CN216331425U

CN216331425U - Vehicle traveling speed control system

Info

Publication number: CN216331425U
Application number: CN202122622979.4U
Authority: CN
Inventors: 魏首材; 戴自西; 许朝雄
Original assignee: Fujian Haishan Machinery Co ltd
Current assignee: Fujian Haishan Machinery Co ltd
Priority date: 2021-10-29
Filing date: 2021-10-29
Publication date: 2022-04-19
Anticipated expiration: 2031-10-29

Abstract

The utility model discloses a vehicle traveling speed control system, which comprises a transfer case, an engine, a variable pump, a variable motor and a reversing valve, wherein the transfer case is connected with the engine through a transmission shaft; the transfer case comprises a first input shaft, a second input shaft, a first output shaft and a second output shaft; the first input shaft is connected with the first output shaft through a first clutch, the first input shaft is connected with the engine, and the first output shaft is used for connecting a rear axle transmission shaft of a vehicle; the first input shaft is connected with the second output shaft through a second clutch, the second output shaft is connected with the variable pump, the variable pump is connected with the variable motor through a hydraulic oil circuit, the variable motor is connected with the second input shaft, and the second input shaft is connected with the first output shaft through a third clutch; the vehicle running speed control system selects a combination mode of a variable pump and a variable motor to automatically control the driving torque, speed and the like required by the vehicle, so that the problem of power output waste can be greatly reduced.

Description

Vehicle traveling speed control system

Technical Field

The utility model relates to the technical field of vehicles, in particular to a vehicle traveling speed control system.

Background

The road sweeper is a widely used environmental sanitation vehicle, and is used for sweeping the ground and collecting and transporting garbage on the ground. The operation mechanism of a common road sweeper mainly comprises a sweeping disc, a fan, a water path and the like, and the operation process is that the sweeping disc rotates to sweep road surface garbage to a middle suction nozzle in the process of low-speed running of a vehicle; the high-pressure waterway sprays water to flush the ground and reduce dust; the fan works to generate vacuum, and the suction nozzle sucks garbage on the road surface into the garbage can, so that the road surface cleaning work is completed.

The road sweeper realizes a walking function through the engine, a low-speed gear is selected during walking operation, and the required engine is high in rotating speed, high in oil consumption, large in power loss and hydrostatic; the hydrostatic pressure is adopted during sweeping operation, the speed change range is small, the power loss is lower than that of a chassis self-contained transmission system, but the power loss is also greatly wasted.

SUMMERY OF THE UTILITY MODEL

Therefore, it is necessary to provide a vehicle running speed control system to solve the problem of excessive engine power loss of the vehicle.

In order to achieve the above object, the present embodiment provides a vehicle traveling speed control system, which includes a transfer case, an engine, a variable pump, a variable motor, and a directional control valve;

the transfer case comprises a first input shaft, a second input shaft, a first output shaft and a second output shaft; the first input shaft is connected with the first output shaft through a first clutch, the first input shaft is connected with the engine, and the first output shaft is used for connecting a rear axle transmission shaft of a vehicle; the first input shaft is connected with the second output shaft through a second clutch, the second output shaft is connected with the variable pump, the variable pump is connected with the variable motor through a hydraulic oil circuit, the variable motor is connected with the second input shaft, and the second input shaft is connected with the first output shaft through a third clutch.

Further, the transfer case also comprises a third output shaft, and the second output shaft is connected with the third output shaft through a fourth clutch.

Further, still include the fan, the third output shaft is connected the fan.

Further, still include the water pump, third output shaft is connected the water pump.

Further, still include the solenoid directional valve, the solenoid directional valve sets up on the hydraulic oil way.

Further, the electromagnetic directional valve is a two-position two-way electromagnetic directional valve.

Further, still include the flushometer, the flushometer sets up on the hydraulic oil way.

Further, the variable displacement pump is a variable displacement plunger pump.

Further, the vehicle is a road sweeper.

Different from the prior art, the vehicle running speed control system in the technical scheme selects the hydraulic system as a closed system, selects a combination mode of a variable pump and a variable motor, and automatically controls the driving torque, the speed and the like required by the vehicle, so that the problem of power output waste can be greatly reduced.

Drawings

FIG. 1 is a schematic structural diagram of a vehicle traveling speed control system according to an embodiment;

FIG. 2 is a second schematic structural diagram of a vehicle traveling speed control system according to the present embodiment;

fig. 3 is a schematic structural diagram of the vehicle traveling speed control system having an external variable pump and an external gear pump in this embodiment.

Description of reference numerals:

1. a transfer case;

11. a first input shaft; 12. a second input shaft;

13. a first output shaft; 14. a second output shaft; 15. a third output shaft;

2. a variable displacement pump;

3. a variable displacement motor;

4. an electromagnetic directional valve;

5. a flush valve;

6. an engine;

7. a fan;

8. a variable pump is externally connected;

9. is externally connected with a gear pump.

Detailed Description

To explain technical contents, structural features, and objects and effects of the technical solutions in detail, the following detailed description is given with reference to the accompanying drawings in conjunction with the embodiments.

Referring to fig. 1 to 3, the present embodiment provides a vehicle traveling speed control system, which can be applied to a road sweeper. Referring to fig. 1 and 2, the traveling speed control system includes a transfer case 1, an engine 6, a variable pump 2, a variable motor 3, and a directional control valve. The transfer case 1 can distribute the power of the engine 6, and the transfer case 1 includes a first input shaft 11, a second input shaft 12, a first output shaft 13, and a second output shaft 14.

Referring to fig. 1, the first input shaft 11 is connected to the first output shaft 13 through a first clutch, the first input shaft 11 is connected to the engine 6, the first output shaft 13 is used for connecting a rear axle transmission shaft of a vehicle, the engine 6 transmits power to the rear axle transmission shaft through the first input shaft 11 and the first output shaft 13, and the rear axle transmission shaft transmits the power to wheels of the vehicle for the vehicle to run.

Referring to fig. 1, the first input shaft 11 is connected to the second output shaft 14 through a second clutch, the second output shaft 14 is connected to the variable displacement pump 2, and the engine 6 transmits power to the variable displacement pump 2 through the first input shaft 11 and the second output shaft 14.

Referring to fig. 1, the variable displacement pump 2 is connected to the variable displacement motor 3 through a hydraulic oil path, the variable displacement motor 3 is connected to the second input shaft 12, and the variable displacement pump 2 drives the variable displacement motor 3 to operate through the hydraulic oil path. The second input shaft 12 is connected with the first output shaft 13 through a third clutch, and the variable motor 3 can transmit power to a rear axle transmission shaft through the second input shaft 12 and the first output shaft 13 for the vehicle to run.

Among the above-mentioned technical scheme, vehicle walking speed control system chooses for use hydraulic system to be the closed system, chooses for use the combination mode of variable pump and variable motor, carries out automatic control to required drive moment of vehicle, speed etc. this power output waste problem that can greatly reduced.

Referring to fig. 1, in the present embodiment, the transfer case 1 further includes a third output shaft 15, and the second output shaft 14 is connected to the third output shaft 15 through a fourth clutch. By connecting the fan 7 or the water pump to the third output shaft 15, the transfer case 1 can transmit power to the fan 7 or the water pump through the third output shaft 15. The fan 7 works to generate vacuum, and the garbage on the road surface is sucked into the garbage can through the suction nozzle, so that the road surface cleaning work is completed. The water pump works to wash the ground and fall dust, and further wash the road.

Referring to fig. 1, in this embodiment, the walking speed control system further includes an electromagnetic directional valve 4, and the electromagnetic directional valve 4 is disposed on the hydraulic oil line. The electromagnetic directional valve 4 is a two-position two-way electromagnetic directional valve, a two-position three-way electromagnetic directional valve and the like so as to drive the two-way oil supply of the variable displacement pump 2. Preferably, the variable displacement pump 2 is a variable displacement plunger pump.

Referring to fig. 1, in the embodiment, when the temperature of the hydraulic oil path is too high, the heat dissipation problem needs to be considered. The walking speed control system further comprises a flushing valve 5, wherein the flushing valve 5 is arranged on the hydraulic oil circuit, the valve core is pushed by the pressure of the high-pressure oil circuit, the hydraulic oil of the low-pressure oil circuit is sent back to the oil tank, and meanwhile, the low-pressure is kept. Thus, the flushing valve can release hot oil to play a role in heat dissipation.

Referring to fig. 1, in the present embodiment, the vehicle may be a road sweeper, a water supply pump truck, or the like, and the vehicle may be a gasoline vehicle or a hybrid vehicle. Preferably, the vehicle is a road sweeper, and is used for sweeping the ground and collecting and transporting garbage on the ground, keeping the road clean, reducing the content of inhalable particles in the air and improving the living environment of people.

Referring to fig. 1, in the present embodiment, the first input shaft 11 and the second output shaft 14 are driven by a gear, the second output shaft 14 and the third output shaft 15 are driven by a gear, and the second input shaft 12 and the first output shaft 13 are driven by a gear.

Referring to fig. 1, when the road sweeper arrives at a work site, the vehicle travels by switching from the transfer case 1 to the hydrostatic travel mode, and the travel work is performed.

Referring to fig. 1, during a walking operation, the walking speed control system controls the variable displacement pump 2 to output high-pressure oil to the variable displacement motor 3, the variable displacement motor 3 drives the first output shaft 13 of the pneumatic box, and the first output shaft 13 is further transmitted to the rear axle transmission shaft to enable the vehicle to walk. In the process of walking operation, the electromagnetic valve is not electrified, and the flushing valve 5 dissipates heat.

Referring to fig. 1, when acceleration or deceleration is required during the traveling of the vehicle, the traveling speed of the vehicle can be controlled by increasing or decreasing the output rotation speed of the variable motor 3 by using the independent variable of the variable pump 2 or the variable motor 3 or the combined variable of the variable pump 2 or the variable motor 3.

Referring to fig. 1, when a vehicle needs to be braked and decelerated during traveling, at the instant of stepping on service brake, the variable pump 2 and the variable motor 3 return to the neutral position and are not output, the electromagnetic directional valve 4 is electrified, so that the high-low pressure oil path is communicated, and the vehicle is braked and decelerated through the brake.

Referring to fig. 2, in this embodiment, the output end of the variable pump 2 may be further connected to another external variable pump and an external gear pump. The hydraulic pressure output by the external variable pump 8 controls a large water pump, a small water pump, a washing disc, a rolling brush motor, a suction port lifting oil cylinder and the like. Preferably, the external variable pump 8 is a variable displacement plunger pump. The hydraulic pressure output by the external gear pump 9 controls a rear cleaning mechanism oil cylinder (comprising a lifting oil cylinder and a transverse moving oil cylinder), a bin box turning oil cylinder, a bin tail gate locking oil cylinder and the like.

It should be noted that, although the above embodiments have been described herein, the utility model is not limited thereto. Therefore, based on the innovative concepts of the present invention, the technical solutions of the present invention can be directly or indirectly applied to other related technical fields by making changes and modifications to the embodiments described herein, or by using equivalent structures or equivalent processes performed in the content of the present specification and the attached drawings, which are included in the scope of the present patent.

Claims

1. A vehicle traveling speed control system is characterized by comprising a transfer case, an engine, a variable pump, a variable motor and a reversing valve;

2. The vehicle travel speed control system of claim 1 wherein the transfer case further includes a third output shaft, the second output shaft being connected to the third output shaft by a fourth clutch.

3. The system of claim 2, further comprising a fan, wherein the third output shaft is coupled to the fan.

4. The system as claimed in claim 2, further comprising a water pump, wherein the third output shaft is connected to the water pump.

5. The vehicle running speed control system according to claim 1, further comprising an electromagnetic directional valve provided on the hydraulic oil circuit.

6. The vehicle running speed control system according to claim 5, wherein the electromagnetic directional valve is a two-position two-way electromagnetic directional valve.

7. The vehicle running speed control system according to claim 1, further comprising a flush valve provided on the hydraulic oil path.

8. The vehicle running speed control system according to claim 1, wherein the variable displacement pump is a variable displacement plunger pump.

9. The system according to any one of claims 1 to 8, wherein the vehicle is a road sweeper.