The layout of the workplace of the tractor driver. MTZ tractor cabs: what they are The layout of the tractor driver's workplace

Machines and the technologies implemented on their basis must fully comply with safety requirements. This applies to their design and operation.

In accordance with these GOSTs, tractors and self-propelled vehicles are equipped with cabins with stiffening frames. Tractors with safety cabs must be equipped with seat belts.

To reduce slip, the floor of the cab or tractor platform is made of corrugated material. The cab ceiling above the driver's seat must be padded.

The tractor must have an audible signal that is activated from the cab. The sound level of the signal must be 8 dB above the level external noise tractor.

Tractors, self-propelled vehicles and cars must be equipped with a first aid kit to provide the victim with the first first aid and a thermos for drinking water.

Fuel fillers and cooling systems should be located outside the cab.

Combine harvesters and self-propelled chassis with mounted threshers must be grounded to discharge static electricity.

Tractors and self-propelled machines designed to work in mountainous conditions must have a device for stabilizing the skeleton or signaling the limit roll.

Tractors and self-propelled vehicles that can move along the roads of a common network are equipped with external lighting devices. Oversized self-propelled agricultural machines must be provided with signaling means in accordance with the Rules traffic and have a flashing or continuous orange or yellow light at the top.

60) Occupational safety in the repair of electrical equipment, operation of electrical installations

Responsibilities of the person responsible for the operation of consumer electrical installations.
This person must provide:
- reliable, economical and safe operation of electrical installations;
- development and implementation of measures to save electrical energy;
- introduction of new equipment and technologies that contribute to more reliable, economical and safe operation of electrical installations;
- organization and timely implementation of scheduled preventive maintenance and preventive testing of electrical equipment and equipment;
- systematic control over the load schedule, take the development and implementation of measures to reduce power consumption during peak hours of the load of the power system;
- training, instruction and periodic testing of knowledge of the energy service personnel;
- settlement and technical accounting of electricity consumption;
- Availability and timely check of means of protection;
- fulfillment of energy supervision regulations in deadlines;
- maintaining technical documentation, development of necessary instructions and provisions. Organization of safe operation of electrical installations.
The head of the enterprise is obliged to ensure the maintenance, operation and maintenance of electrical installations in accordance with the requirements of the current regulations. normative documents. To do this, he must:
- appoint a person responsible for the good condition and safe operation electrical facilities from among the engineers who have electrical training and have passed the knowledge test in the prescribed manner;
- provide the required number of electrical workers;
- approve the Regulations on the energy service of the enterprise, as well as job descriptions and labor protection instructions;
- to establish such a procedure that the employees who are entrusted with the duties of servicing electrical installations conduct careful monitoring of the assigned and equipment;
- ensure that the knowledge of employees is checked in a timely manner;
- ensure the conduct of emergency and preventive tests and measurements of electrical installations;
- ensure the technical examination of electrical installations.

GOST 12.2.120-2005

Group T58

INTERSTATE STANDARD

Occupational safety standards system

CABINS AND STATIONS FOR OPERATORS OF TRACTORS AND SELF-PROPELLED AGRICULTURAL MACHINES

General safety requirements

Occupational safety standards system. Cabs and operator's workplaces of tractors and powered agricultural machines. General safety requirements

MKS 13.100
65.060.10

Introduction date 2010-07-01

Foreword

The goals, basic principles and basic procedure for carrying out work on interstate standardization are established by GOST 1.0-92 "Interstate standardization system. Basic provisions" and GOST 1.2-2009 "Interstate standardization system. Interstate standards, rules and recommendations for interstate standardization. Rules for the development, adoption, application, renewal and cancellation

About the standard

1 DEVELOPED by the Scientific and Production Republican Unitary Enterprise "Belarusian State Institute for Standardization and Certification (BelGISS)"

2 INTRODUCED by the Committee for Standardization, Metrology and Certification under the Council of Ministers of the Republic of Belarus

3 ADOPTED by the Interstate Council for Standardization, Metrology and Certification (minutes N 28 of December 9, 2005)

Voted for the adoption of the standard:

4 This standard takes into account the main regulatory provisions of the following European Directives:

- 2003/37/EC Directive of the European Parliament and of the Council of 26 May 2003 on the type approval of agricultural and forestry tractors, their trailers and interchangeable towed machines, together with their systems, components and individual technical blocks repealing Directive 74/150/EEC;

- 75/321/EEC Council Directive of 20 May 1975 concerning the approximation of the laws of the Member States concerning the steering of wheeled agricultural and forestry tractors;

- 76/432/EEC Council Directive of 6 April 1976 on the approximation of the laws of the Member States concerning brake devices wheeled agricultural and timber tractors;

- 86/415/EEC Council Directive of 24 July 1986 on the installation, location, operation and identification of control devices for agricultural and forestry tractors

5 APPROVED AND INTRODUCED BY Order federal agency on technical regulation and metrology of November 10, 2009 N 498-st

6 INSTEAD OF GOST 12.2.120-88


Information on the entry into force (termination) of this standard is published in the index "National standards.

Information about changes to this standard is published in the "National Standards" index, and the text of the changes is published in the "National Standards" information indexes. In case of revision or cancellation of this standard, the relevant information will be published in the information index "National Standards"


AMENDED, published in IUS N 6, 2011

Amended by database manufacturer

1 area of ​​use

1 area of ​​use

This standard applies to cabs and workplaces of operators of tractors, self-propelled agricultural machines, universal power equipment (hereinafter referred to as machines) and establishes requirements for the size of the minimum space, access systems on workplace the operator, the location of the controls, the working conditions of the operator and the protective properties of the cabin.

The standard does not apply to small tractors and self-propelled machines with a gauge of less than 1150 mm, as well as to self-propelled machines designed to work in enclosed spaces (greenhouses, livestock farms).

2 Normative references

This standard uses references to the following standards:

GOST 12.2.002.2-91 * System of labor safety standards. Tractors agricultural and forest wheeled. Method for static testing of protective structures
_______________
GOST R ISO 3463-2008.


GOST EN 632-2003 Agricultural machines. Combine harvesters and forage harvesters. Safety requirements

GOST EN 894-2-2002* Machine safety. Ergonomic requirements for the design of information display facilities and controls. Part 2. Means of displaying information
_______________
* Within the territory of Russian Federation GOST R ISO 51341-99** applies.

**Probably an original error. You should read GOST R 51341-99. - Database manufacturer's note.


GOST ISO 2867-2002 * Earth-moving machines. Access systems
_______________
* On the territory of the Russian Federation, GOST R ISO 2867-99 applies.


GOST ISO 3164-2002* Earth-moving machines. Protective devices. Deformation limitation volume characterization in laboratory tests
_______________
* On the territory of the Russian Federation, GOST R ISO 3164-99 applies.


GOST ISO 3411-2003 * Earth-moving machines. Anthropometric data of operators and minimum working space around the operator
_______________
* On the territory of the Russian Federation, GOST R ISO 3411-99 applies.


GOST ISO 4252-2005 Agricultural tractors. Operator's workplace, entrance and exit. Dimensions

GOST ISO 4253-2005 Agricultural tractors. Operator's seat location. Dimensions

GOST ISO 4254-3-2005 Tractors and machines for agricultural work and forestry. Technical means security. Part 3. Tractors

GOST ISO 4254-7-2005 Tractors and machines for agricultural work and forestry. Technical means of ensuring security. Part 7. Combine harvesters, forage harvesters and cotton harvesters

GOST ISO 5353-2003* Earth-moving machines, tractors and machines for agricultural work and forestry. Seat reference point
_______________
* On the territory of the Russian Federation, GOST 27715-88 applies.

GOST 5727-88 Safety glass for land transport. General specifications

GOST ISO 8082-2002* Logging machines, timber and forestry tractors. Rollover protection device. Safety requirements and test methods
_______________
* On the territory of the Russian Federation, GOST R ISO 8082-2005 "Self-propelled forestry machines. Rollover protection devices. Technical requirements and test methods"


GOST ISO 8083-2002* Logging machines, timber and forestry tractors. Falling object protection device. Safety requirements and test methods
_______________
* On the territory of the Russian Federation there is GOST R ISO 8083-2008 "Forestry machines. Falling object protection devices. Technical requirements and test methods"


GOST ISO 8084-2002* Logging machines, timber and forestry tractors. Operator protection device. Safety requirements and test methods
_______________
* On the territory of the Russian Federation, GOST R ISO 8084-2005 "Machines for forestry. Operator protection devices. Technical requirements and test methods"


GOST ISO 11112-2000* Earth-moving machines. Operator's seat. Dimensions and technical requirements
_______________
* On the territory of the Russian Federation, GOST 20062-96 "Tractor seat. General technical conditions" is valid.


GOST ISO 14269-2-2003 Tractors and self-propelled machines for agricultural work and forestry. Operator workplace environment. Part 2: Test method and characteristics of heating, ventilation and air conditioning systems

GOST ISO 14269-5-2003 Tractors and self-propelled machines for agricultural work and forestry. Operator workplace environment. Part 5: Test method for containment systems

GOST 20062-96 Tractor seat. General specifications

GOST 21480-76 "Man-machine" system. Mnemonic schemes. General ergonomic requirements

GOST 21753-76 "Man-machine" system. Control levers. General ergonomic requirements

GOST 26336-97* Tractors, machines for agriculture and forestry, self-propelled machinery for lawns and gardens. Conventions(symbols) of elements of control systems, maintenance and display of information
_______________
* On the territory of the Russian Federation, GOST 26336-84 "Tractors and agricultural machines, mechanized, lawn and garden equipment. A system of symbols for designating controls and means of displaying information. Symbols"

GOST 27258-87 (ISO 6682-86) Earth-moving machines. Comfort zones and control reach

GOST 30879-2003 (ISO 3795:1989)* Road vehicles, tractors and machines for agricultural work and forestry. Determination of the combustion characteristics of interior trim materials
________________
* On the territory of the Russian Federation, GOST 25076-81 applies.

Note - When using this standard, it is advisable to check the validity of the reference standards according to the "National Standards" index, compiled as of January 1 of the current year, and according to the corresponding information indexes published in the current year. If the reference standard is replaced (modified), then when using this standard, you should be guided by the replacing (modified) standard. If the referenced standard is canceled without replacement, the provision in which the reference to it is given applies to the extent that this reference is not affected.

3 Cabin design requirements

3.1 The starting point for the parameters of the cabs, the areas for the location of the controls is the control point of the seat (SIP) in accordance with GOST ISO 5353.

3.2 For a single cab, the minimum working space for the operator should be:

- for tractors - GOST ISO 4252, for industrial, forestry and forestry tractors - GOST ISO 3411;

- for grain, forage and cotton harvesters - GOST EN 632 and GOST ISO 4254-7.

For other machines, the minimum working space for the operator, designed to work while sitting, limited by the elements of the cab and its equipment with an average seat position in terms of adjustments (vertical, horizontal and weight of the operator), is in accordance with Figure 1.

NOTE The minimum working space of 3.2 and 3.3 does not determine the shape of the cabin.

Picture 1

The minimum width of the double cab of the machine at a height of 310 to 810 mm above the SIP must be at least 1400 mm.

3.3 The minimum working space in cabs designed for the operator to work in a standing position is in accordance with GOST ISO 3411.

3.4 For machines with a reverse control post, the minimum working space and cab dimensions for reverse control are according to the technical specifications (TS) for machines of specific models.

3.5 The dimensions of the doorway and passage at the maximum possible open door for tractor cabins, except for timber industry and forestry, - in accordance with GOST ISO 4252, for cabins of grain harvesters, forage harvesters and cotton harvesters - in accordance with GOST EN 632 and GOST ISO 4254-7, for other machines - in accordance with Figure 2. For forestry and forestry tractors - according to GOST ISO 2867.

______________
* Height of the doorway with the maximum possible open door of the cab, designed for standing work.
** Minimum door opening height for seated cabs.

Note - The drawing does not define the shape of the doorway.

Figure 2

For wheeled tractors of classes less than 1.4, it is allowed, in agreement with the consumer, to reduce the height of the doorway by no more than 50 mm.

3.6 Machines, with the exception of self-propelled agricultural machines, caterpillar agricultural, forestry and forestry tractors (except for vineyard tractors) must be equipped with protective cabins or have devices to limit deformation when the machine overturns and (or) random objects fall on the cab. Industrial tractors must be equipped with protective cabins or devices at the request of the consumer.

Dimensions and location relative to the SIP and operators seat:

- free space zones for protective cabins (devices) of wheeled agricultural tractors - according to GOST 12.2.002.2;

- deformation limiting volume for protective cabins (devices) of industrial, timber industry and forestry tractors - according to GOST ISO 3164.

Forestry and forestry tractors must be equipped with cabs and equipped with rollover protection devices in accordance with GOST ISO 8082, from falling objects - in accordance with GOST ISO 8083 and penetrating objects - in accordance with GOST ISO 8084.

In the case of a two-seat cab, a similar limitation of deformation must be ensured for the second workplace.

For cabs with a reversible helm station, the limitation of cab deformation must be ensured for both positions of the helm station.

3.7 In the case of installation of a protective cage or roll bar, the requirements of 3.2, 3.3 and 3.6 should be followed.

3.8 Tractor cabins, except for timber industry and forestry, must have emergency exits in accordance with GOST ISO 4252, cabins of grain harvesters, forage harvesters, cotton harvesters - in accordance with GOST EN 632 and GOST ISO 4254-7. Cabins of timber industry and forestry tractors must have an emergency (second) exit in accordance with GOST ISO 2867.

The rest of the cars must have at least three emergency exits, which can be doors, windows, hatches. Emergency exits should be located on different sides (walls, roof) of the cabin and have the shape of an ellipse with main axes 640 and 440 mm or a square with a side of 600 mm, or a rectangle 650x470 mm, or a circle with a diameter of 650 mm.

Emergency exits must be opened without the aid of a tool. If the emergency exits are glazed windows, then there must be means in the cab that, in an emergency, can break or expose the glass of the emergency exit.

3.9 The cabs of the machines must protect the operator from precipitation.

4 Cabin equipment requirements

4.1 Cabins of self-propelled agricultural machines must be equipped with windshield wipers for the front windows, and for other machines - for the front and rear windows.

The number of windshield wipers must be set in the technical specifications for machines of specific models.

Windshield wipers must operate regardless of engine operation and vehicle speed.

It is allowed, in the absence of a reversible control station for the rear window wipers, to have only a manual drive.

4.2 Tractor cabs must be equipped with windshield washers.

Installation of windshield washers in the cabs of other machines - at the request of the customer.

4.3 The cabs of the machines must be glazed with glass in accordance with GOST 5727 or other glasses, subject to the safety requirements in accordance with GOST 5727.

At the request of the customer, it is allowed to glaze the windows of the cabs of machine operators with heat-absorbing glass.

4.4 Openable windows of the cab of the machine must be opened from the inside and have a device for fixing them in the open and closed positions.

4.5 The doors of the cabs of the machines must have locks that can be locked with a key and a latch to hold them in the extreme open position.

It is allowed to install a lock on one door if there is an internal lock on the other door.

Emergency hatches (if any) must have internal locks.

4.6 The workplace of the operator of tractors, except for timber industry and forestry, and machines must be equipped with a sprung seat with a backrest in accordance with GOST 20062. Timber and forestry tractors must be equipped with a seat - according to GOST ISO 11112.

On special modifications of agricultural tractors, in technically justified cases, in agreement with the consumer, it is allowed to install an unsprung seat.

For workplaces with a reversible control post, the seat must be rotated by 180 ° with its fixation in working positions.

If an asymmetrical arrangement of the seat is necessary, it is allowed, in agreement with the customer, to reduce the distance to the nearest side wall by no more than 75 mm.

The dimensions of the additional seat, if any, are according to specifications for cars of specific models.

4.7 The cabs of the machines must be equipped with internal lighting lamps with independent switching.

The recommended illumination at the level of the control panel and instrument panel from the interior lighting of the cab is at least 5 lux.

4.8 In the cab of the machines, places should be provided for the location of the case with the first aid kit. medical care, devices for attaching a thermos or other container for drinking water and for the operator's outerwear.

4.9 In the cab of the machines, a place must be provided for installing a radio receiver and an antenna.

4.10 The cabs of the machines must be equipped with a device that protects the operator's face from direct sunlight.

4.11 Cabins of wheeled vehicles that can move on public roads must be equipped with external rear-view mirrors on the left and right. Cabins of self-propelled agricultural machines, except for combine harvesters and forage harvesters, must be equipped with an external rear-view mirror only on the left, providing a rear view. Equipment with mirrors for the cabins of grain and forage harvesters - according to GOST EN 632.

4.12 Control devices in the cab of the machine must be illuminated to prevent glare.

4.13 Materials used for interior trim of tractor and machine cabs must be non-flammable in accordance with GOST 30879.

5 Requirements for the operator's workplace

5.1 Cabins must be equipped with ventilation and heating systems. The operating characteristics of the ventilation and heating systems of the operator's workplace must comply with GOST ISO 14269-2.

The design of the cabin must ensure tightness in accordance with GOST ISO 14269-5.

For self-propelled vehicles, intended for operation mainly in the warm season, it is allowed not to install a heating system.

When installing an air conditioner, the performance of the air conditioning system must comply with GOST ISO 14269-2.

5.2 The concentration of dust in the cabin, depending on the content of SiO, should not exceed that specified in Table 1.


Table 1

5.3 The concentration of carbon monoxide in the cabin with the engine running should not exceed 20 mg/m.

5.4 The location of the pedals and steering wheel relative to the SIP point for tractors - according to GOST ISO 4253. For machines, the dimensions, the relative position of the seat, steering wheel, clutch and brake pedals with the selected free play must correspond to those shown in Figures 3, 4 and Table 2. Adjustable steering column at the same time, it should be in the middle position according to the adjustments.

1 - wheel; 2 - brake and clutch pedals

Note - The dimensions in the drawing are indicated under the following conditions:

- the pedals are in the position where free play is selected;

- the seat is loaded and is in the middle position according to the adjustments.

Figure 3

1 - clutch; 2 - brake; 3 - accelerator

Figure 4

table 2

In millimeters

The location of the controls for timber industry and forestry tractors is according to GOST 27258.

The location of the main and auxiliary controls for machines with a reversible control post - according to specifications for machines of specific models.

5.5 The reach of the operator's arms and legs for tractors - according to GOST ISO 4254-3 GOST EN 632.

For other machines with the operator in a seated position:

- in the zone (figure 5) there should be no elements that may interfere with the operator's use of the controls;

- a free space of at least 120 mm between adjacent moving elements must be provided in the zone.

Figure 5 - Spherical zones of free space

5.6 Typical methods of actuating the main controls are given in Appendix A.

5.7 Location of the steering wheel for tractors - according to GOST ISO 4253, for grain and forage harvesters - according to GOST EN 632. For other machines, the steering wheel should be located relative to the horizontal plane within 10° - 30° when working while sitting and within 0° - 30° when working standing, while the adjustment should be carried out steplessly or with fixation in at least four positions, steering the wheel of these machines must have height adjustment (along the axis of the column) by (100 ± 20) mm steplessly or with fixation in at least five positions.

5.8 Location of controls for tractors - according to GOST ISO 4252, for grain and forage harvesters - according to GOST EN 632.

For other machines, the distances from the handles of the control levers (in all positions) to the elements of the workplace and between the handles, except for levers driven simultaneously by a horizontally located brush, must be at least 50 mm for those driven by a brush with a control force of more than 150 N and not less than 25 mm - for actuated by fingers with a control force from 80 to 150 N (except for engine controls).

The minimum length of the free part of the lever together with the handle in any of its positions, driven by the fingers, must be at least 50 mm, driven by the brush - at least 150 mm.

5.9 Ergonomic requirements for the design of controls - according to GOST EN 894-2. Dimensions of lever handles and other manual controls - according to GOST 21753.

5.10 The support pads of the main pedals must have a length and width of at least 60 mm.

If there are no control pedals in the cab of the machine, then on the floor of the cab there should be inclined stops or foot pads at an angle of 25 ° -40 ° to the horizontal, covered with a low heat-conducting material. Their dimensions should ensure a stable position of the operator's legs.

5.11 The distance between the edges of the platforms adjacent to non-blocking pedals should be within 50-100 mm, blocked - 5-20 mm. The angle of rotation from the longitudinal axis of the machine of the support platforms of the pedals actuated by the foot of the foot must not exceed 15 °.

5.12 Forces of resistance to movement of controls should not exceed the values ​​given in Table 3.


Table 3

5.13 Control elements with which the hands of the operator or maintenance personnel come into contact should be made of a material with a thermal conductivity of not more than 0.2 W / (m K), or they should have a coating of this material with a thickness of at least 0.5 mm.

5.14 The means of displaying information should be marked with symbols in accordance with GOST 26336 and (or) inscriptions that should be located on the instrument panel in the immediate vicinity of the indicator (instrument, signal light, etc.) or on the indicator itself.

Requirements for the design of information display means - in accordance with GOST EN 894-2, the construction of mnemonic diagrams - in accordance with GOST 21480.

Appendix A (recommended). Typical methods for activating the main controls

Table A.1

Electronic text of the document
prepared by Kodeks JSC and verified against:
official publication
M.: Standartinform, 2010

Revision of the document, taking into account
changes and additions prepared
JSC "Kodeks"

Cabin- this is the workplace of the tractor driver, where they spend most of their working time. Go to design tractor cabs impose the following requirements: rational placement of controls and seats; reliable protection from precipitation, sun, wind, dust, exhaust gases, negative temperatures, vibration and noise; good visibility; large margin of safety.

The cabin is usually made of all-metal with two hermetically sealed glazed doors. On tractors, it is installed on four shock absorber supports, which reduce the vibration of the tractor operator's workplace.

Cabins of general purpose tractors are equipped with seats for the driver and passenger with seat belts. On universal row-crop tractors, the cabs are single (the seat is only for the tractor driver).

Tractor seat ( rice. 211, a) is mounted on a suspension 4 of a parallel-gram type and sprung with a spring 2 or a torsion bar. To dampen vibrations, it is equipped with a hydraulic shock absorber 5. The tightening force of the spring 2 is adjusted by screw 1 in direct proportion to the weight of the driver.

On the MTZ-80 seat ( rice. 211.6) are bolted to the cab floor. The seat is single, with a torsion bar suspension and a hydraulic shock absorber. The design of the seat provides for its adjustment in height, length, backrest tilt and suspension stiffness. Rice. 211. Tractor seat: a- diagram of the device; 1 - adjusting screw; 2 - spring: 3 - bracket: 4 - suspension; 5 - shock absorber; b - seat MTZ tractor-80: 1 - length adjustment lever: 2 - handle for fixing the seat in height; 3- lower arm; 4 - rubber stop; 5 upper lever: 6 - stiffness adjustment screw; 7 - backrest tilt mounting bracket.

Handle 2 changes the position of the seat in height within 0 ... 80 mm. By moving lever 1 to the left, you can move the seat forward or backward by 150 mm every 25 mm. Using bracket 7, the backrest is installed in three positions at different angles of inclination to the seat. Screw 6 regulate the stiffness of the suspension. In the free state, the suspension arms 3 should touch the rubber stop 4, and in the loaded state (with the tractor driver), the seat should drop by 60 mm, i.e., half of its full speed. With a larger stroke of the seat, the screw 6 increases the stiffness of the suspension (turn the screw 6 counterclockwise), and with a smaller deflection, the stiffness is reduced.

The microclimate in the cabin must meet the following requirements: the air temperature during the warm period must not exceed the ambient air temperature by more than 2...3 °C and must not be lower than 14 and not higher than 28 °C; air velocity during ventilation - no more than 1.5 m/s; dust content in the air - no more than 2 mg/m3, carbon monoxide - no more than 20 mg/m3.

For forced supply ventilation of tractor cabs, a fan-dust separator is used ( rice. 212, a). It is installed on the cabin roof and consists of a housing, a hood 1, a branch pipe 2, a shield 3 and an electric motor 5 with an impeller 4. When the fan impeller rotates, air from the environment is sucked under the hood 1, enters the impeller blades and, after centrifugal cleaning, passes through the pipe 2 into the cab. Dust separated from the air, hitting the partitions, is thrown out through the outlet in the fan housing. Shield 3 regulates the direction of air flow into the cabin.

To ensure normal temperature conditions in the summer, the cabs of some tractors are equipped with forced ventilation with an air cooler. Typically, water-evaporative type air coolers are used, the operation of which is based on the principle of heat extraction during the evaporation of water in contact with air. Such a ventilation unit supplies dust-free, humidified and cooled air to the cabin.

Ventilation unit with an air cooler of the tractor DT-75MV ( rice. 212b) works as follows. Outside air through the air intake hood installed above the cabin roof is sucked in by centrifugal fan 1 and undergoes centrifugal cleaning of dust, which is removed through the slots in the volute 2. Then the air passes through the central pipe 4 and is additionally cleaned of dust in the sump when the direction of movement changes. With the passage of warm air through the tray and grate 9, moistened with water from the tank 14, the water evaporates. The air is humidified, cooled and, passing through the cassette 8, is finally cleared of dust and water droplets. The purified air enters the cabin through the shield 5, which regulates the direction of its flow.

The water level in the sump is automatically set by a float valve 10, which closes and opens the hole connecting the cavities of the water tank and the sump. Water consumption is 1.2...1.4 l/h.

In the cold season, the cabin of the T-150K tractor is blown with air heated in the core of the radiator of the diesel cooling system. Air enters the radiator core through intake 1 ( rice. 213) through a metal sleeve 2. When leaving the cabin, warm air is directed through pipes 3 with slots to blow windshields, and through the outlet pipe 4 - directly into the cabin. A damper with a handle 5 is installed on the outlet pipe, when it is closed, all incoming air is directed to blowing the windows. The damper handle in the inlet pipe can completely block the air flow into the cab.

The order of layout of the workplace of the tractor driver methodically differs from the set out order of work in the design of cars.

The control of the machine-tractor unit is carried out by one driver (operator). Therefore, in most cases, it is sufficient to install single cabs on tractors. Separate firms install a removable passenger seat on request.

The minimum dimensions of single cabins are normalized, mainly width and height. At the same time, they are guided by the anthropometric data of the driver of the 95th level of representativeness. The length of the cab is not regulated, since it largely depends on the layout of the tractor.

When laying out the workplace of the tractor driver, first of all, it is necessary to determine the minimum dimensions and geometric shape of the surfaces that limit the space insidecab around the seated operator in a comfortable working position. These parameters are set by the standards. It is impossible to change the limiting dimensions down, and they are usually increased, because the cabin provides space for outerwear, a first aid kit, a thermos with water or food, and sometimes for a second seat.

The internal dimensions of the cabin are set from the control reference point of the seat (CTS) in accordance with GOST 27715-88.

The minimum dimensions of single and double cabs of agricultural and forestry tractors are established in GOST 12.2.120 - 88. For a single cab, the minimum height is 1010 mm, the minimum width is 900 mm at a height of 310 to 810 mm from the horizontal plane passing through the CTS (Fig. .2.19). The width of a double cabin at the same height must be at least 1400 mm. The distance from the vertical plane passing the seat reference point (TOS) to the rear wall of the cabin must be at least 365 mm.The minimum dimensions of a single cab and a cab with an additional seat, designed for sitting, for industrial tractors are regulated by GOST 12.2.121 - 88.

Structural elements that ensure safe entry and exit from the tractor cab include the following: doorway and cab doors, steps, handrails, emergency hatch. The cabin fully meets the safety requirements for entry and exit with the following parameters:

cabin floor height from the supporting surface 1008 mm;

doorway height 1600 mm;

doorway width 400 mm;

width, depth and height of the step above the level of the supporting surface, respectively, 300, 100 and 520 mm;

distance between the floor surface and the level of the last step 316 mm;

the angle of step removal outward is 55...65°.

In accordance with the requirements of international (ISO) and domestic standards, tractors must be equipped with footrests and (or) ladders with the obligatory presence of handrails and (or) railings. The location, dimensions, requirements for the materials of these elements are specified in the standard. Can be used as intermediate steps structural elements other purpose.

The dimensions of the doorway with the maximum possible opening of the door are established by GOST 12.2.120 - 88. If the operator works while sitting, then the height of the doorway should be at least 1300 mm, and if in a standing position - 1800 mm. The shaded area refers to the cab where the operator is seated. If the doors open less than 90°, the dimensions of the doorway must be increased so that the clear dimension corresponds to that shown in fig. 2.22.

The tractor cab must have at least three emergency exits, which can be doors, windows, hatches, and each exit should be placed on opposite sides (on the walls, in the roof) of the cab. This requirement is important to comply with in order to increase safety when the tractor rolls over and the doors are jammed. The dimensions of emergency exits must correspond to the dimensions of the doorway or be as follows: for a square section of at least 600x600 mm; for rectangular - 470 x 650 mm; for round - 700 mm in diameter; for oval - the main axes of the ellipse are at least 640 and 440 mm. Emergency exits must open without the use of a tool. Cabin windows, if they are intended for emergency exit, must be equipped with means for breaking or promptly dismantling glass.