SU954300A1

SU954300A1 - Device for interlocking endless-track tractor suspension

Info

Publication number: SU954300A1
Application number: SU803256457A
Authority: SU
Inventors: Владислав Юрьевич Иматович; Абрам Моисеевич Кауфман; Юрий Георгиевич Попов; Юрий Николаевич Фильков
Original assignee: Производственное Объединение "Челябинский Тракторный Завод Им.В.И.Ленина"; Челябинский Филиал Научно-Исследовательского Тракторного Института
Priority date: 1980-12-30
Filing date: 1980-12-30
Publication date: 1982-08-30

Description

(54) УСТРОЙСТВО ДЛЯ БЛОКИРОВКИ ПОДВЕСКИ ГУСЕНИЧНОГО ТРАКТОРА(54) DEVICE FOR LOCKING SUSPENSION OF TRACKED TRACTOR

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Изобретение относитс к транспортному машиностроению, преимущественно к гусеничным машинам с навесным оборудованиемFIELD: transport engineering, mainly tracked vehicles with attachments.

Известно устройство дл блокировки подвески гусеничного трактора, преимущественно с навесным оборудованием, содержащее гидравлические цилиндры дл ограничени одностороннего перемещени подвески , св занные с системой управлени , включающей гидрораспределитель, и блок изменени направлени движени мащины 1.A device for locking the suspension of a crawler tractor, preferably with attachments, contains hydraulic cylinders for limiting one-way movement of the suspension associated with a control system including a hydraulic distributor and a unit for changing the direction of movement of the mask 1.

Это устройство обеспечивает блокировку подвески при ручном или другом виде управлени , в то врем как при земл ных и других работах с навесным оборудованием требуетс , чтобы блокировка включалась автоматически при изменении направлени движени трактора, чем облегчаетс и упрощаетс работа водител .This device provides suspension blocking with manual or other control, while ground and other work with attachments require that the lock is automatically activated when the tractor moves in the direction of movement, which makes it easier and easier for the driver to work.

Цель изобретени - повышение производительности трактора и повышение комфортности работы водител .The purpose of the invention is to increase tractor productivity and increase driver comfort.

Указанна цель достигаетс тем, что устройство снабжено датчиками концевых положений штоков гидроцилиндров, гидрораспределитель св зан с блоком изменени направлени движени машины, а указанные датчики соединены с системой управлени гидроцилиндрами.This goal is achieved by the fact that the device is equipped with sensors for the end positions of the hydraulic cylinder rods, the hydraulic distributor is connected to the unit for changing the direction of movement of the machine, and these sensors are connected to the hydraulic cylinders control system.

Гидрораспределитель выполнен по схеме 4/3 с электрогидравлическим от двух вспомогательных распределителей управлением, а устройство снабжено источником высокого давлени жидкости, св занным с гидрораспределителем , и источником низкого давлени жидкости, св занным со вспомогательными распределител ми.The valve is configured as 4/3 with electro-hydraulic control from two auxiliary valves, and the device is equipped with a high pressure fluid source connected to the hydraulic valve and a low pressure fluid source connected to the auxiliary distributors.

Кроме того, устройство снабжено гидро10 замками, установленными между гидроцилиндрами и гидрораспределителем.In addition, the device is equipped with hydraulic locks 10 installed between the hydraulic cylinders and the hydraulic distributor.

На чертеже показаны гидравлическа и электрическа части схемы предлагаемого устройства, а также св зи с элементами 15 трактора.The drawing shows the hydraulic and electrical parts of the circuit of the proposed device, as well as the connection with the elements of the tractor 15.

Claims

The hydraulic part of the circuit includes a low pressure hydraulic pump 1 for supplying two auxiliary valves 2 and 3 with solenoid control, 2Q high pressure hydraulic pump 4, for controlling attachments through control unit 5 and for feeding hydraulic cylinders 7 and 8, rods which rest against suspension arms and hydraulic locks 9 and 10 installed between hydraulic cylinders 7 and 8 and the hydraulic distributor 6. The electrical part of the circuit contains sensors And -14 for the end positions of the hydraulic cylinder rods c, connected in parallel and connected with the hydraulic cylinder rods, contacts 15 and 16, connected with the driving direction lever 17 (forward and backward) on the tractor, contacts 18-22 and suspension lock mode buttons 23 and 24, respectively, at the front and rear moves. The device works as follows. When the buttons 23 and 24 are not pressed (as shown in the diagram), the suspension lock is turned off both in the forward and in reverse gears, which is necessary, for example, when driving in transport mode. If the buttons 23 and 24 are turned off at the moment when the lock was turned on, then the rods of the hydraulic cylinders 7 and 8 are in the lower position and the electrical circuit is closed through sensors 13 and 11. Through contacts 18 and 21 and sensors 13 and 11, power is supplied to solenoid auxiliary distributor 2, which includes the valve of the valve 6. The fluid enters the rod end of the cylinder, the sensors 13 and 11 open, the power from the electromagnet is removed, the valve of the valve 6 is returned to the neutral position. Suspension unblocking. When the button 23 is pressed, contact 18 opens and contacts 19 and 20 close. Contact 19 connects the distributor electromagnet, 2 to contact 16 (reverse), and contact 20 connects the solenoid electromagnet 3 to contact 15 (forward). When the lever 17 is moved to the forward position, the contact 15 closes. The supply voltage is applied through contact 20 to the distributor electromagnet 3, which is shifted to the left, opens access of the liquid to the end valve of the hydraulic distributor 6. The spool of the hydraulic distributor moves to the left. Fluid begins to flow into the upper cavities of the hydraulic cylinders 7 and 8, and (the lower ones are connected to the drain, the rods slide out to the balancers of the rollers, i.e., the suspension is blocked. The contacts of sensor 11 and 13 are closed. When the rods come to a predetermined position , the contacts of sensors 12 and 14 are opened. Since the latter are connected in parallel in the circuit, the power supply circuit of the electromagnet of the distributor 3 is opened after reaching the predetermined position of the last of the rods. The others are at this time on the stop in the hydraulic cylinder. The operation of the rods is caused by different heights of the rollers on the ground.Cylinders can also be filled when the tractor is moving. pump 4. The oil in the hydraulic cylinders is locked with hydraulic locks 9 and 10. When the lever 17 is in the reverse position, the power supply is supplied via contacts 16 and 19 to the electro to the collar of the distributor 2, which opens the access of fluid to the left end cavity of the hydraulic distributor 6, and the spool moves to the right. Fluid begins to flow into the lower cavities of the hydraulic cylinders 7 and 8, and the upper ones are connected to the drain. The rams of the hydraulic cylinders are moved to the upper position, the suspension is unlocked. The contacts of sensors 12 and 14 are closed, and when all the rods reach the specified upper position, the contacts of sensors 11 and 13 are opened, as a result of which the power supply circuit of the electromagnet of the distributor 2 is broken, and the valve of the hydraulic distributor 6 returns to its original position, disconnecting the cylinders from the system. The fluid in the hydraulic cylinders is locked with hydraulic locks 9 and 10. If the working conditions require the suspension to be locked in reverse and unlocked at the front, button 24 is pressed, and contacts 21 and 22 are closed. Button 23 returns to its original position. Power to the electromagnet of the distributor 3 is supplied via contact 22, and to the electromagnet of the distributor 2 through contact 21, as a result of which the distributor 2 turns on when the lever 17 is in the forward position and the distributor 3 is in the reverse position. The rest of the work is similar to that described. The proposed device frees the driver from having to act on a special command body controlling the locking of the suspension and locking the hydraulic cylinders on and off, thereby improving tractor performance and reducing driver fatigue, which results in increased comfort. Claim I. Invention device for locking the suspension of a crawler tractor, mainly with attachments, contains hydraulic cylinders for restricting one-way movement of the suspension, associated with a control system including a hydraulic distributor, and a unit for changing the direction of movement of the machine, distinguishing