WO2021073067A1 - Oil circuit control device and street sweeping vehicle - Google Patents

Abstract

An oil circuit control device and a street sweeping vehicle, comprising a first overflow valve (221), a first three-position four-way directional reversing valve (11), and a second three-position four-way directional reversing valve (12). The first three-position four-way directional reversing valve (11) and the second three-position four-way directional reversing valve (12) are M-type reversing valves; an oil inlet of the first overflow valve (221) is connected to an oil inlet of the first three-position four-way directional reversing valve (11); an oil return port of the first overflow valve (221) is connected to an oil inlet of the second three-position four-way directional reversing valve (12); an oil return port of the first three-position four-way directional reversing valve (11) is connected to the oil inlet of the second three-position four-way directional reversing valve (12); an output end of the first three-position four-way directional reversing valve (11) is connected to a sucker height-adjusting oil cylinder (233); an output end of the second three-position four-way directional reversing valve (12) is connected to a first hydraulic motor (231). On the basis of series connection and the arrangement of the overflow valve, rotation of a sweeper is not affected while a sucker ascends and descends, and therefore, it is achieved that the sucker and the sweeper can operate at the same time; by using a serial oil circuit layout, an oil circuit structure is simplified, and the circuit layout of the street sweeping vehicle is optimized.

Description

Oil circuit control device and sweeper Technical field

The invention relates to the field of new energy environmental sanitation equipment, in particular to an oil circuit control device and a sweeper. This application is based on the Chinese invention patent application with the application date of October 16, 2019 and the application numbers of CN 201910987221.5 and CN201910987224.9. The content of this application is incorporated herein by reference.

Background technique

At present, common vacuum suction floor sweepers on the market generally have wheels for running along the ground, at least one rotatably driven sweeping brush for cleaning the ground, and a vacuum dustbin. With the help of this floor sweeper, the ground can be cleaned, such as streets, sidewalks or parking lots. At least one sweeping brush of the floor sweeper acts on the ground to be cleaned and guides the sweeping objects to the suction nozzle assembly, and the sweeping objects are sucked by the suction nozzle assembly and transported to the vacuum waste bin through a pipe connected to the suction nozzle assembly. To this end, the vacuum waste bin is loaded with negative pressure by the suction device, thereby forming a suction flow from the suction nozzle assembly to the vacuum waste bin and from the vacuum waste bin to the suction device. The sweeper is configured to be self-propelled, for example in the form of a vehicle, wherein a vacuum waste bin may be provided in the rear area of the vehicle, and the vehicle may have a driver's cabin in the front area. Set the sweeping device and the suction nozzle assembly in front of the sweeper's driving direction. When cleaning is needed, put the sweeping device down, drive the sweeping brush to rotate, and gather garbage in front of the suction nozzle assembly, which is sucked in by the suction nozzle assembly. Go to the trash can at the rear.

In the actual sweeping process, the road conditions will be more complicated, and the sweeper needs to be able to respond to various complex road conditions and different cleaning modes in a timely manner. The existing control oil circuits of the swing arm, sweeping brush and suction cup are more complicated and affect The oil circuit layout of the sweeper also makes the swing arm, sweeping brush, and suction cup unable to work at the same time, which affects work efficiency and ease of use.

technical problem

The first object of the present invention is to provide a sweeper with a sweeping device that can operate simultaneously and has a simple oil circuit layout.

The second object of the present invention is to provide a highly integrated oil circuit control device.

The third object of the present invention is to provide a sweeping vehicle with the above-mentioned oil passage control device.

Technical solutions

In order to achieve the first objective of the present invention, the present invention provides a sweeper, which includes a suction cup, a suction cup lifting cylinder, a first hydraulic motor and a first sweeping brush. The suction cup lifting cylinder is connected to the suction cup and drives the suction cup to move. A sweeping brush is connected and drives the first sweeping brush to rotate. The sweeper also includes a first overflow valve, a first three-position four-way reversing valve, a second three-position four-way reversing valve, and a first three-position four-way reversing valve. The valve and the second three-position four-way reversing valve adopt M-type reversing valve; the oil inlet of the first relief valve is connected with the oil inlet of the first three-position four-way reversing valve, and the return of the first relief valve is The oil port is connected with the oil inlet of the second three-position four-way reversing valve, the oil return port of the first three-position four-way reversing valve is connected to the oil inlet of the second three-position four-way reversing valve, the first three The output end of the four-position reversing valve is connected with the suction cup lifting cylinder, and the output end of the second three-position four-way reversing valve is connected with the first hydraulic motor.

A further solution is that the sweeper also includes a first swing arm, a second swing arm, a first telescopic cylinder, a second telescopic cylinder, a third three-position four-way reversing valve, a fourth three-position four-way reversing valve, The second relief valve, the second hydraulic motor and the second sweeping brush, the third three-position four-way reversing valve and the fourth three-position four-way reversing valve adopt M type reversing valve; the second hydraulic motor and the second sweeping The brush is connected and drives the second sweeping brush to rotate. The output end of the second three-position four-way reversing valve is connected to the second hydraulic motor. The first hydraulic motor and the first sweeping brush are arranged on the first swing arm, and the second hydraulic motor And the second sweeping brush are arranged on the second swing arm, the first telescopic oil cylinder is connected with the first swing arm and drives the first swing arm to move, and the second telescopic oil cylinder is connected with the second swing arm and drives the second swing arm to move; The oil inlet of the second relief valve is connected to the oil inlet of the third three-position four-way reversing valve, and the oil return port of the second relief valve is connected to the oil inlet of the fourth three-position four-way reversing valve. The oil return port of the three-position four-way reversing valve is connected to the oil inlet port of the fourth three-position four-way reversing valve, and the oil return port of the fourth three-position four-way reversing valve is connected to the first three-position four-way reversing valve. The oil inlet of the valve is connected, the output end of the third three-position four-way reversing valve is connected to the first telescopic cylinder, and the output end of the fourth three-position four-way reversing valve is connected to the second telescopic cylinder.

A further solution is that the sweeper also includes a first lifting cylinder and a second lifting cylinder. The first lifting cylinder is connected to the first swing arm and drives the first swing arm to lift, and the second lifting cylinder is connected to and drives the second swing arm. The second swing arm is raised and lowered, and the suction cup lifting cylinder, the first lifting cylinder and the second lifting cylinder are connected in parallel with the output end of the first three-position four-way reversing valve.

A further solution is that a hydraulic lock is connected between the output end of the first three-position four-way reversing valve and the suction cup lifting cylinder.

A further solution is that the first hydraulic motor and the second hydraulic motor are connected in series.

A further solution is that the sweeper also includes a steering drive device and a diverter valve. The steering gear oil port of the diverter valve is connected to the steering drive device. The other system oil ports of the diverter valve are connected to the first three-position four-way reversing valve.口连接。 Mouth connection.

A further solution is that the sweeper also includes a garbage can, a garbage dumping cylinder, and a fifth and third four-way reversing valve. The fifth and third four-way reversing valve uses an M-type reversing valve, and the garbage dumping cylinder is connected to the garbage can. And drive the trash can to rotate, the garbage dumping cylinder is connected with the output end of the fifth and third four-way reversing valve; the oil inlet of the fifth and third four-way reversing valve is connected with the diverter port of the diverter valve; the fifth and third The output end of the four-position reversing valve is connected with the garbage dumping cylinder.

A further solution is that the sweeper also includes a clamshell cylinder and a sixth three-position four-way reversing valve. The sixth three-position four-way reversing valve adopts an M-type reversing valve. The clamshell cylinder is connected to and driven by the lid of the garbage bin. The cover body rotates, and the clamshell cylinder is connected to the output end of the sixth and third-position four-way reversing valve; the oil inlet of the sixth and third-position four-way reversing valve is connected to the steering gear port of the diverter valve; the sixth and third-position four-way valve The oil return port of the reversing valve is connected with the oil inlet of the fifth three-position four-way reversing valve.

A further solution is that the sweeper also includes an oil tank and a third overflow valve, and the third overflow valve is connected between the oil tank and the oil ports of other systems of the diverter valve.

A further solution is that the sweeper further includes an oil tank and a fourth overflow valve, and the fourth overflow valve is connected between the oil tank and the oil return port of the diverter valve.

In order to achieve the second object of the present invention, the present invention provides an oil circuit control device, including a valve block, the valve block is provided with a first surface, a second surface, and a third surface; the valve block is provided with a first output oil circuit, The second output oil path, the first oil inlet oil path, the first oil return oil path, the third output oil path, the fourth output oil path, the second oil inlet oil path, the second oil return oil path, the first overflow The oil passage is connected with the second overflow oil passage, the first overflow oil passage, the first oil inlet oil passage and the second oil return oil passage are connected, and the second overflow oil passage is connected with the second oil inlet oil passage; the first output The oil circuit is provided with interfaces on the first surface and the second surface respectively, the second output oil circuit is provided with interfaces on the first surface and the second surface respectively, and the third output oil circuit is provided with interfaces on the first surface and the second surface respectively. , The fourth output oil path is respectively provided with interfaces on the first surface and the second surface; the first oil inlet path, the first oil return path, the second oil inlet path, and the second oil return path are all in the first The surface is provided with an interface; the first overflow oil passage and the second overflow oil passage are both provided with an interface on the third surface.

A further solution is that the oil circuit control device further includes a first three-position four-way reversing valve and a second three-position four-way reversing valve arranged on the first surface, the first three-position four-way reversing valve and the first three-position four-way reversing valve. The two- and three-position four-way reversing valve adopts the M-type reversing valve; the first three-position four-way reversing valve corresponds to the first output oil circuit, the second output oil circuit, the first oil inlet oil circuit, and the first return circuit respectively. The oil circuit is connected, and the second three-position four-way reversing valve is correspondingly connected with the third output oil circuit, the fourth output oil circuit, the second oil inlet oil circuit, and the second oil return oil circuit respectively.

A further solution is that the oil path control device further includes a first relief valve arranged on the third surface, and the first relief valve is respectively connected to the first relief oil path and the second relief oil path.

A further solution is that the first surface and the third surface are respectively located on opposite sides of the valve block; the second surface is located between the first surface and the third surface.

A further solution is that the first oil inlet oil passage and the second oil return oil passage are connected in a "V" shape.

A further solution is that the valve block also has a fifth output oil path, a sixth output oil path, a third oil input path, a third oil return path, a seventh output oil path, and an eighth output oil path inside the valve block. , The fourth oil inlet oil path, the fourth oil return oil path, the third overflow oil path and the fourth overflow oil path; the third oil return oil path is connected with the second oil inlet oil path, and the third overflow oil path , The third oil inlet oil passage is connected with the fourth oil return oil passage, the fourth overflow oil passage is communicated with the fourth oil inlet oil passage; the fifth output oil passage is provided with interfaces on the first surface and the second surface respectively. The six output oil circuits are respectively provided with interfaces on the first surface and the second surface, the seventh output oil circuit is respectively provided with interfaces on the first surface and the second surface, and the eighth output oil circuit is respectively provided on the first surface and the second surface. There are interfaces; the third oil inlet path, the third oil return path, the fourth oil inlet path, and the fourth oil return path are all provided with interfaces on the first surface; the third overflow oil path and the fourth overflow oil path The oil circuits are all provided with interfaces on the third surface.

A further solution is that the oil circuit control device further includes a third three-position four-way reversing valve and a fourth three-position four-way reversing valve arranged on the first surface, a third three-position four-way reversing valve and a third three-position four-way reversing valve. The four-three-position four-way reversing valve adopts the M-type reversing valve; the third three-position four-way reversing valve corresponds to the fifth output oil circuit, the sixth output oil circuit, the third oil inlet oil circuit, and the third return valve respectively. Oil circuit connection, the fourth three-position four-way reversing valve is correspondingly connected with the seventh output oil circuit, the eighth output oil circuit, the fourth oil inlet oil circuit, and the fourth oil return oil circuit; the oil circuit control device also It includes a second overflow valve arranged on the third surface, and the second overflow valve is respectively connected with the third overflow oil passage and the fourth overflow oil passage.

A further solution is that the valve block is provided with a first installation groove, other system oil passages, and a fifth oil return oil passage inside. The first installation groove is connected between the other system oil passages and the fifth oil return oil passage. The system oil circuit is connected with the fourth oil inlet oil circuit; the oil circuit control device further includes a third overflow valve, and the third overflow valve is installed at the first installation groove.

A further solution is that the valve block is provided with a second installation groove, a steering oil passage and a sixth oil return oil passage inside the valve block. The second installation groove is connected between the steering oil passage and the sixth oil return oil passage; the oil passage is controlled. The device also includes a fourth overflow valve, and the fourth overflow valve is installed at the second installation groove.

In order to achieve the third objective of the present invention, the present invention provides a sweeper, which includes the oil circuit control device as described above.

Beneficial effect

The sweeper provided by the above scheme uses an M-type three-position four-way reversing valve, and uses a series connection method to reverse the oil return port of the first three-position four-way reversing valve and the second three-position four-way reversing valve. The oil inlet of the valve is connected, and the first relief valve is connected between the oil inlet of the first three-position four-way reversing valve and the oil inlet of the second three-position four-way reversing valve. The hydraulic motor has relatively low requirements for oil pressure, so the hydraulic motor is set at the back stage of the oil circuit so that when the suction cup lifting cylinder drives the suction cup to lift, the first relief valve can be turned on by inputting a large oil pressure. Then the overflowing oil drives the hydraulic motor and the sweeping brush to rotate, so that the suction cup is raised and lowered without affecting the sweeping operation, and then the suction cup and the sweeping brush can operate at the same time. The tandem oil circuit layout also simplifies the oil circuit structure. Optimize the route layout of sweepers.

In addition, the sweeper can also be equipped with two swing arms and two sweeping brushes, and use a series connection method to connect the oil return port of the third three-position four-way reversing valve and the oil inlet port of the fourth three-position four-way reversing valve. Connect, and connect the second relief valve between the oil inlet of the third three-position four-way reversing valve and the oil inlet of the fourth three-position four-way reversing valve, so that when the swing arm is telescopic, the input can be The larger oil pressure causes the second relief valve to be turned on, and then the overflowing oil drives the subsequent telescopic cylinder to expand and contract, so that the two swing arms can telescopically move at the same time, and the reversing valve can also be controlled to move in time-sharing. At the same time, it does not affect the sweeping operation of the subsequent stage, so that the sweeper can adapt to the sweeping width of different grounds and different working environments, which improves the ease of use of the sweeper.

In addition, the lifting cylinder is connected in parallel with the suction cup lifting cylinder, and then the swing arm and the suction cup are driven to lift, and the hydraulic lock is equipped to keep the position fixed.

Furthermore, the series arrangement optimizes the layout of the oil circuit, and does not affect the actual sweeping rotation of the sweeping brush.

In addition, the diverter valve ensures the stable operation of the steering drive device, thereby improving the walking safety of the sweeper.

In addition, since the dumping of the trash can and the opening of the lid of the trash can are performed after parking, the steering drive device is no longer required at this time, so the fifth, three-position, four-way reversing valve and the sixth, fifth, third, and four-way reversing valve are no longer needed. The directional reversing valve is arranged in an oil circuit of the rotating drive device, thereby optimizing the structural layout of the oil circuit.

In addition, the third relief valve is used as the total relief valve of other system circuits, and the fourth relief valve is used as the total relief valve of the rotating circuit. The third relief valve and the fourth relief valve can be set in the bypass valve. Externally, it can conveniently adjust the thresholds of the third and fourth overflow valves, so that it can be adjusted according to different use environment conditions.

Through the oil circuit control device provided by the above solution, the oil circuit is arranged in the valve block, so that the pipeline can be connected in the valve block. The highly integrated oil circuit arrangement is used to optimize and simplify the oil circuit arrangement and greatly improve the oil circuit. Road reliability.

And, by arranging the three-position four-way reversing valve and the corresponding interface on the first surface, the other interface of the output oil path is arranged on the second surface, and the overflow valve is arranged on the third surface , Thereby optimizing the outer space layout of the valve block, enabling the valve block to carry more functional modules, making the oil circuit control device more highly integrated, and reducing the space occupation.

Furthermore, the arrangement of the V-shaped oil circuit is convenient for processing and manufacturing.

In addition, the arrangement of oil circuits, reversing valves and relief valves can also be added, so that the valve block can connect and control more equipment.

And, set a third relief valve and a fourth relief valve in the valve block, the third relief valve is used as the total relief valve of other system circuits, and the fourth relief valve is used as the total relief valve of the rotating circuit, and can be used as the total relief valve of the rotating circuit. The third relief valve and the fourth relief valve are arranged on the valve block outside the diverter valve, which can conveniently adjust the threshold of the third relief valve and the fourth relief valve, so that it can be carried out according to different use environment conditions. Targeted adjustment.

Description of the drawings

Fig. 1 is a block diagram of an oil circuit system in an embodiment of a sweeper of the present invention.

Fig. 2 is an enlarged view of the oil circuit system at A in Fig. 1.

Fig. 3 is an enlarged view of the oil circuit system at B in Fig. 1.

Fig. 4 is a structural diagram of an oil circuit control device in an embodiment of the sweeper of the present invention.

Fig. 5 is an exploded view of the structure of the oil passage control device in the embodiment of the sweeper of the present invention.

Fig. 6 is a structural diagram of a valve block in an embodiment of the sweeping vehicle of the present invention.

Fig. 7 is a structural diagram of the valve block in the embodiment of the sweeping vehicle of the present invention from another perspective.

Fig. 8 is a cross-sectional view of the valve block in the embodiment of the sweeping vehicle of the present invention.

Fig. 9 is a side view of the valve block in the embodiment of the sweeper of the present invention.

Fig. 10 is a cross-sectional view at A in Fig. 9.

Fig. 11 is a cross-sectional view at B in Fig. 9.

Fig. 12 is a cross-sectional view at C in Fig. 9.

Fig. 13 is a cross-sectional view at D in Fig. 9.

The present invention will be further described below with reference to the drawings and embodiments.

Embodiments of the present invention

1 to 3, the sweeper includes a suction cup, a suction cup lifting cylinder 233, a first hydraulic motor 231, a first sweeping brush, a first swing arm, a second swing arm, a first telescopic cylinder 237, a second telescopic cylinder 238, The first lifting cylinder 234 and the second lifting cylinder 235, the second hydraulic motor 232 and the second sweeping brush. The suction cup lifting cylinder 233 is connected to the suction cup and drives the suction cup to move. The first hydraulic motor 231 is connected to the first sweeping brush and drives the first The sweeping brush rotates, the second hydraulic motor 232 is connected to the second sweeping brush and drives the second sweeping brush to rotate. The first hydraulic motor 231 and the first sweeping brush are arranged on the first swing arm, and the second hydraulic motor 232 and the second sweeping The brush is arranged on the second swing arm, the first telescopic cylinder 237 is connected with the first swing arm and drives the first swing arm to move laterally, and the second telescopic cylinder 238 is connected with the second swing arm and drives the second swing arm to move laterally , And then use the telescopic cylinder to drive the sweeping brush to move laterally, and the first lifting cylinder 234 is connected to the first swing arm to drive the first swing arm to lift, and the second lifting cylinder 235 is connected to the second swing arm to drive the second swing arm to lift , And then realize the lifting of the sweeping brush.

The sweeper also includes a trash can, a flip cylinder 245, a flip cylinder 246, a garbage dumping cylinder 243, and a garbage dumping cylinder 244. The flipping cylinders 245, 246 are connected to the cover of the garbage can and drive the cover to rotate. The garbage dumping cylinders 243, 244 and The trash can is connected and drives the trash can to rotate.

The sweeper also includes a fuel tank 211, a master pump assembly 212, a diverter valve 213, a first relief valve 221, a second relief valve 222, a third relief valve 223, a fourth relief valve 224, the first three-position four Two-way reversing valve 11, the second three-position four-way reversing valve 12, the third three-position four-way reversing valve 13, the fourth three-position four-way reversing valve 14, the fifth three-position four-way reversing valve 15 and The sixth three-position four-way reversing valve 16. In this embodiment, the diverter valve 213 adopts an FLD type diverter valve, the first three-position four-way reversing valve 11, the second three-position four-way reversing valve 12, the third three-position four-way reversing valve 13, the fourth and third Four-position reversing valve 14, the fifth three-position four-way reversing valve 15, and the sixth three-position four-way reversing valve 16 are all M-type reversing valves.

The master cylinder assembly 212 is connected to the fuel tank 211, the output end of the master cylinder assembly 212 is connected to the oil inlet P of the diverter valve 213, and the other system port B of the diverter valve 213 is connected to the third three-position four-way reversing valve 13 The oil inlet is connected, and the third relief valve 223 is connected between the oil tank 211 and the other system oil ports of the diverter valve 213.

The oil inlet of the second relief valve 222 is connected to the oil inlet of the third three-position four-way reversing valve 13, and the oil return port of the second relief valve 222 is connected to the inlet of the fourth three-position four-way reversing valve 14. The oil port is connected, the oil return port of the third three-position four-way reversing valve 13 is connected to the oil inlet port of the fourth three-position four-way reversing valve 14 and the oil return port of the fourth three-position four-way reversing valve 14 is connected to The oil inlet of the first three-position four-way reversing valve 11 is connected, and the output port AB of the third three-position four-way reversing valve 13 is connected to the first telescopic cylinder 237, and a throttle valve is also connected therebetween. The output end AB of the three-position four-way reversing valve 14 is connected to the second telescopic oil cylinder 238, and a throttle valve is also connected therebetween.

The oil inlet of the first relief valve 221 is connected to the oil inlet of the first three-position four-way reversing valve 11, and the oil return port of the first relief valve 221 is connected to the oil inlet of the second three-position four-way reversing valve 12. Oil port connection, the oil return port of the first three-position four-way reversing valve 11 is connected to the oil inlet of the second three-position four-way reversing valve 12, and the output end of the first three-position four-way reversing valve 11 is connected to the suction cup The lifting cylinder 233 is connected, and the suction cup lifting cylinder 233, the first lifting cylinder 234, and the second lifting cylinder 235 are connected in parallel with the output end of the first three-position four-way reversing valve 11, and the first three-position four-way reversing valve A hydraulic lock 236 is connected between the output end of 11 and the suction cup lifting cylinder 233. The hydraulic lock 236 can be a two-way hydraulic lock. Of course, the first lifting cylinder 234 and the second lifting cylinder 235 can also be respectively connected with corresponding hydraulic locks.

The output end AB of the second three-position four-way reversing valve 12 is connected to the first hydraulic motor 231, and a one-way throttle valve is also connected therebetween. The first hydraulic motor 231 and the second hydraulic motor 232 are connected in series, and the second hydraulic motor 231 is connected in series with the second hydraulic motor 232. The rear stage of the hydraulic motor 232 is connected to the oil tank.

The sweeper also includes a steering drive device 241 and a steering cylinder 242. The steering drive device 241 is connected to the steering cylinder 242. The oil inlet of the sixth three-position four-way reversing valve 16 is connected to the steering gear oil port of the diverter valve 213. The oil return port of the three-position four-way reversing valve 16 is connected to the oil inlet port of the fifth three-position four-way reversing valve 15, and the oil return port of the fifth three-position four-way reversing valve 15 is connected to the steering drive device 241, The garbage dumping cylinders 243, 244 are connected to the output end of the fifth three-position four-way reversing valve 15, and the flip cylinders 245, 246 are connected to the output end of the sixth three-position four-way reversing valve 16, and there is a single connection between them. To the throttle valve. The fourth relief valve 224 is connected between the oil tank 211 and the oil return port of the shunt valve 213, the third relief valve 223 and the fourth relief valve 224 are both arranged outside the shunt valve 213, and the third relief valve serves as other The total relief valve of the system circuit, and the fourth relief valve is used as the total relief valve of the steering circuit.

4-13, the oil circuit system of this embodiment integrates part of the equipment on the oil circuit control device. The oil circuit control device includes the above-mentioned three-position four-way reversing valve and overflow valve, as well as a valve block. 3. The valve block 3 is provided with a first surface 301, a second surface 302, a third surface 303, a fourth surface 304, and a fifth surface 305, which can be described with reference to the orientation of FIGS. 6 and 8. The first surface 301 is located on the valve On the top surface of the block 3, the third surface 303 is located on the bottom surface of the valve block 3. The second surface 302, the fourth surface 304, and the fifth surface 305 are all side surfaces and are located between the first surface 301 and the third surface 303. A surface 301 and a third surface 303 are located on opposite sides, and the fourth surface 304 and the fifth surface 305 are located on opposite sides.

The valve block 3 is provided with a first output oil path 311, a second output oil path 312, a first oil inlet path 321, a first oil return path 331, a third output oil path 313, and a fourth output oil path 314 inside. , The second oil inlet oil passage 322, the second oil return oil passage 332, the first overflow oil passage 341 and the second overflow oil passage 342, the first overflow oil passage 341, the first oil inlet oil passage 321 and the The second oil return oil passage 332 is in communication, and the second overflow oil passage 342 is in communication with the second oil inlet oil passage 322.

The first output oil passage 311 is provided with ports on the first surface 301 and the second surface 302 respectively, the second output oil passage 312 is provided with ports on the first surface 301 and the second surface 302 respectively, and the third output oil passage 313 is respectively provided with ports on the first surface 301 and the second surface 302. The first surface 301 and the second surface 302 are provided with interfaces, and the fourth output oil passage 314 is provided with interfaces on the first surface 301 and the second surface 302, respectively.

The first oil inlet oil passage 321, the first oil return oil passage 331, the second oil inlet oil passage 322, and the second oil return oil passage 332 are all provided with interfaces on the first surface 301, and the first oil return oil passage 331 is still there. The fourth surface 304 is provided with an interface, and both the first overflow oil passage 341 and the second overflow oil passage 342 are provided with an interface on the third surface 303.

The valve block 3 also has a fifth output oil path 315, a sixth output oil path 316, a third oil inlet path 323, a third oil return path 333, a seventh output oil path 317, and an eighth output oil path. Path 318, fourth oil inlet path 324, fourth oil return path 334, third overflow oil path 343, and fourth overflow oil path 344.

The third oil return oil passage 333 is in communication with the second oil inlet oil passage 322, the third overflow oil passage 343, the third oil inlet oil passage 323, and the fourth oil return oil passage 334 are in communication, and the fourth overflow oil passage 344 is communicated with The fourth oil inlet oil passage 324 is in communication.

The fifth output oil passage 315 is provided with interfaces on the first surface 301 and the second surface 302, respectively, the sixth output oil passage 316 is provided with interfaces on the first surface 301 and the second surface 302, respectively, and the seventh output oil passage 317 is respectively provided on the first surface 301 and the second surface 302. The first surface 301 and the second surface 302 are provided with interfaces, and the eighth output oil passage 318 is provided with interfaces on the first surface 301 and the second surface 302, respectively.

The third oil inlet oil passage 323, the third oil return oil passage 333, the fourth oil inlet oil passage 324, and the fourth oil return oil passage 334 are all provided with interfaces on the first surface 301, and the third overflow oil passage 343 and the The four overflow oil passages 344 are all provided with ports on the third surface 303.

The above-mentioned output oil passages are all arranged in an L-shaped oil passage, and the output oil passages and interfaces are arranged up and down, and are arranged along the length direction of the valve block. The first oil inlet oil passage 321 and the second oil return oil passage 332 are connected in a “V” shape, the second oil inlet oil passage 322 and the third oil return oil passage 333 are connected in a “V” shape, and the third oil inlet oil passage is 323 and the fourth oil return passage 334 are connected in a "V" shape. It can be seen that each oil circuit makes full use of the space of the valve block and is arranged without interfering with each other. Compared with the arrangement of complicatedly connected oil pipes, the valve block oil circuit in this case is more highly integrated and runs more stable.

The first three-position four-way reversing valve 11, the second three-position four-way reversing valve 12, the third three-position four-way reversing valve 13 and the fourth three-position four-way reversing valve 14 are all arranged on the first surface 301 Above, the first three-position four-way reversing valve 11 is respectively connected to the first output oil passage 311, the second output oil passage 312, the first oil inlet oil passage 321, and the first oil return oil passage 331, and the second, third oil passages The four-position reversing valve 12 is respectively connected to the third output oil passage 313, the fourth output oil passage 314, the second oil inlet oil passage 322, and the second oil return oil passage 332, and the third three-position four-way reversal The valve 13 is respectively connected to the fifth output oil path 315, the sixth output oil path 316, the third oil inlet oil path 323, and the third oil return oil path 333, respectively. The fourth three-position four-way reversing valve 14 corresponds to each other. It is connected to the seventh output oil passage 317, the eighth output oil passage 318, the fourth oil inlet oil passage 324, and the fourth oil return oil passage 334.

The first relief valve 221 and the second relief valve 222 are both disposed on the third surface 303, and the first relief valve 221 is connected to the first relief oil passage 341 and the second relief oil passage 342, respectively. The second relief valve 222 is connected to the third relief oil passage 343 and the fourth relief oil passage 344, respectively.

The valve block 3 is provided with a first installation groove 351, other system oil passages 353, and a fifth oil return oil passage 354 inside. The first installation groove 351 is connected between the other system oil passages 353 and the fifth oil return oil passage 354. The other system oil passage 353 is connected to the fourth oil inlet oil passage 324, and the third relief valve 223 is installed at the first installation groove 351.

The valve block 3 is provided with a second installation groove 352, a steering oil passage 355, and a sixth oil return oil passage 367 inside. The second installation groove 352 is connected between the steering oil passage and the sixth oil return oil passage, and the fourth overflow The valve 224 is installed at the second installation groove 352. Other system oil passages 353 and steering oil passages 355 are provided with interfaces on the fifth surface 355, the sixth oil return oil passage 367 is provided with interfaces on the second surface 352, and the fifth oil return oil passage 354 is opposite to the second surface 352. The surface is provided with an interface. The third relief valve 223 and the fourth relief valve 224 are arranged on the valve block 3 outside the shunt valve, which facilitates the adjustment of the oil circuit.

The above-mentioned embodiments are only preferred embodiments of the present invention. For the connection drive of more equipment, it can also be connected in series on other system branches, or the series connection of equipment can be reduced. The series connection of control valves and the connection of overflow valves can be used. Simultaneous operation of the equipment can be realized. Of course, the series or parallel connection of the cylinders of each equipment can be adjusted according to actual needs, including the number of configurations of each equipment can also be adjusted according to actual needs.

It can be seen from the above that by using the M-type three-position four-way reversing valve, and using the series connection method, the return port of the first three-position four-way reversing valve and the inlet of the second three-position four-way reversing valve are connected. The oil port is connected, and the first relief valve is connected between the oil inlet of the first three-position four-way reversing valve and the oil inlet of the second three-position four-way reversing valve, due to the hydraulic motor driving the brush The requirement for the speed is relatively low, so the hydraulic motor is set in the latter stage of the oil circuit, so that when the suction cup lifting cylinder drives the suction cup to lift, the first relief valve can be turned on by inputting a large oil pressure, and then the overflow will be caused. The oil drives the hydraulic motor and the sweeping brush to rotate, so that the suction cup is raised and lowered without affecting the sweeping operation, and then the suction cup and the sweeping brush can operate at the same time. The tandem oil circuit layout is also used to simplify the oil circuit structure and optimize the sweeper Line layout.

The sweeper can also be equipped with two swing arms and two sweeping brushes, and use a series connection method to connect the oil return port of the third three-position four-way reversing valve to the oil inlet of the fourth three-position four-way reversing valve. And connect the second relief valve between the oil inlet of the third three-position four-way reversing valve and the oil inlet of the fourth three-position four-way reversing valve, so that when the swing arm is telescopic, the input can be larger. The oil pressure causes the second overflow valve to be turned on, and then the overflow oil drives the subsequent telescopic cylinder to expand and contract, so that the two swing arms can telescopically move at the same time, and the reversing valve can also be controlled to move in time-sharing telescopic movement at the same time. Too much influence on the rotation of the sweeping brush of the subsequent stage, so that the sweeper can adapt to the sweeping width of different grounds and different working environments, which improves the ease of use of the sweeper.

The lifting cylinder is connected in parallel with the suction cup lifting cylinder to drive the lifting of the swing arm and the suction cup, and is equipped with a hydraulic lock to keep the position fixed. The series arrangement optimizes the layout of the oil circuit and does not affect the actual sweeping rotation of the sweeping brush. The diverter valve ensures the stable operation of the steering drive device, thereby improving the walking safety of the sweeper. Since the dumping of the trash can and the opening of the lid of the trash can are performed after parking, the steering drive device is no longer required at this time, so the fifth, third, four-way reversing valve and the sixth, fifth, three-way, four-way switch The direction valve is arranged in an oil circuit of the rotating drive device, thereby optimizing the structural layout of the oil circuit. The third relief valve is used as the total relief valve of other system circuits, and the fourth relief valve is used as the total relief valve of the rotating circuit. The third relief valve and the fourth relief valve can be arranged outside the shunt valve. It can conveniently adjust the thresholds of the third relief valve and the fourth relief valve, so that it can be adjusted in a targeted manner according to different use environment conditions.

In addition, by arranging the oil circuit in the valve block, the pipeline can be connected in the valve block. The highly integrated oil circuit arrangement is used to optimize and simplify the oil circuit arrangement and greatly improve the reliability of the oil circuit. By arranging the three-position four-way reversing valve and the corresponding interface on the first surface, the other interface of the output oil circuit is arranged on the second surface, and the overflow valve is arranged on the third surface, thereby Optimize the outer space layout of the valve block, so that the valve block can carry more functional modules, make the oil circuit control device more highly integrated, and reduce the space occupation. And the layout of the V-shaped oil circuit is convenient for processing and manufacturing. The third relief valve and the fourth relief valve are provided in the valve block. The third relief valve is used as the total relief valve of other system circuits, and the fourth relief valve is used as the total relief valve of the rotating circuit, and the third relief valve can be used as the total relief valve of the rotating circuit. The relief valve and the fourth relief valve are arranged on the valve block outside the shunt valve, which can conveniently adjust the thresholds of the third relief valve and the fourth relief valve, so that it can be targeted according to different use environment conditions adjust.

Industrial applicability

The oil circuit control device and the sweeper of the present invention are suitable for the field of new energy environmental sanitation equipment. Through the series connection method and the use of the overflow valve, the suction cup can be raised and lowered without affecting the sweeping operation, and then the suction cup and the sweeping The brushes can operate at the same time, and the tandem oil circuit layout is used to simplify the oil circuit structure and simplify the oil circuit layout of the sweeper.

Claims (20)

1. A sweeper, including a suction cup, a suction cup lifting cylinder, a first hydraulic motor, and a first sweeping brush. The suction cup lifting cylinder is connected to the suction cup and drives the suction cup to move. The first hydraulic motor is connected to the first sweeping brush. Connecting and driving the first sweeping brush to rotate; characterized in that: the sweeping vehicle further includes a first overflow valve, a first three-position four-way reversing valve, a second three-position four-way reversing valve, the first A three-position four-way reversing valve and the second three-position four-way reversing valve adopt an M-type reversing valve; the oil inlet of the first relief valve is connected to the first three-position four-way reversing valve The oil inlet of the first relief valve is connected to the oil inlet of the second three-position four-way reversing valve, and the oil return port of the first three-position four-way reversing valve Connected to the oil inlet of the second three-position four-way reversing valve, the output end of the first three-position four-way reversing valve is connected to the suction cup lifting cylinder, and the second three-position four-way reversing valve The output end of the valve is connected with the first hydraulic motor.
2. The sweeping vehicle according to claim 1, characterized in that: the sweeping vehicle further comprises a first swing arm, a second swing arm, a first telescopic cylinder, a second telescopic cylinder, a third three-position four-way reversing valve, The fourth three-position four-way reversing valve, the second overflow valve, the second hydraulic motor and the second sweeping brush, the third three-position four-way reversing valve and the fourth three-position four-way reversing valve adopt M-type reversing valve; the second hydraulic motor is connected to the second sweeping brush and driving the second sweeping brush to rotate, the output end of the second three-position four-way reversing valve is connected to the second hydraulic The motor is connected, the first hydraulic motor and the first sweeping brush are arranged on the first swing arm, the second hydraulic motor and the second sweeping brush are arranged on the second swing arm, so The first telescopic oil cylinder is connected with the first swing arm and drives the first swing arm to move, and the second telescopic oil cylinder is connected with the second swing arm and drives the second swing arm to move; The oil inlet of the second relief valve is connected to the oil inlet of the third three-position four-way reversing valve, and the oil return port of the second relief valve is connected to the fourth three-position four-way reversing valve. The oil inlet is connected, the oil return port of the third three-position four-way reversing valve is connected to the oil inlet of the fourth three-position four-way reversing valve, and the oil return of the fourth three-position four-way reversing valve Port is connected to the oil inlet of the first three-position four-way reversing valve, the output end of the third three-position four-way reversing valve is connected to the first telescopic cylinder, and the fourth three-position four-way The output end of the reversing valve is connected with the second telescopic oil cylinder.
3. The sweeping vehicle according to claim 2, wherein the sweeping vehicle further comprises a first lifting cylinder and a second lifting cylinder, the first lifting cylinder is connected to the first swing arm and drives the first lifting cylinder The swing arm is raised and lowered. The second lifting cylinder is connected to the second swing arm and drives the second swing arm to lift. The suction cup lifting cylinder, the first lifting cylinder and the second lifting cylinder are connected in parallel with The output end of the first three-position four-way reversing valve is connected.
4. The sweeping vehicle according to claim 3, wherein a hydraulic lock is connected between the output end of the first three-position four-way reversing valve and the suction cup lifting cylinder.
5. The sweeping vehicle according to claim 2, wherein the first hydraulic motor and the second hydraulic motor are connected in series.
6. The sweeping vehicle according to any one of claims 1 to 5, characterized in that: the sweeping vehicle further comprises a steering drive device and a diverter valve, the steering gear oil port of the diverter valve is connected with the steering drive device, so The other system oil ports of the diverter valve are connected with the oil inlets of the first three-position four-way reversing valve.
7. The sweeper according to claim 6, characterized in that: the sweeper further comprises a trash can, a garbage dumping cylinder, and the fifth three-position four-way reversing valve, and the fifth three-position four-way reversing valve An M-type reversing valve is adopted, the garbage dumping cylinder is connected with the garbage bin and driving the garbage bin to rotate, and the garbage dumping cylinder is connected with the output end of the fifth three-position four-way reversing valve; The oil inlet of the fifth three-position four-way reversing valve is connected with the steering gear oil port of the diverter valve; the output end of the fifth three-position four-way reversing valve is connected with the garbage dumping cylinder.
8. The sweeping vehicle according to claim 7, characterized in that: the sweeping vehicle further comprises a clamshell cylinder and the sixth three-position four-way reversing valve, and the sixth three-position four-way reversing valve adopts an M-type reversing valve. The clamshell cylinder is connected with the cover of the trash can and drives the cover to rotate, and the clamshell cylinder is connected with the output end of the sixth three-position four-way reversing valve; the sixth and third The oil inlet of the four-position four-way reversing valve is connected to the oil port of the diverter valve; the oil return port of the sixth three-position four-way reversing valve is connected to the fifth three-position four-way reversing valve. The oil inlet is connected.
9. The sweeping vehicle according to claim 6, characterized in that: the sweeping vehicle further comprises a fuel tank and a third overflow valve, and the third overflow valve is connected to the fuel tank and other system oil ports of the diverter valve between.
10. The sweeper according to claim 6, characterized in that: the sweeper further comprises an oil tank and a fourth overflow valve, the fourth overflow valve is connected between the oil tank and the oil return port of the diverter valve between.
11. The oil circuit control device is characterized in that it comprises a valve block provided with a first surface, a second surface and a third surface; the valve block is provided with a first output oil circuit and a second output oil circuit inside. , The first oil inlet oil path, the first oil return oil path, the third output oil path, the fourth output oil path, the second oil inlet oil path, the second oil return oil path, the first overflow oil path and the second oil path Overflow oil passage, the first overflow oil passage, the first oil inlet oil passage and the second oil return oil passage are in communication, the second overflow oil passage and the second oil inlet oil passage Connected; the first output oil path is provided with an interface on the first surface and the second surface, respectively, and the second output oil path is provided with an interface on the first surface and the second surface, respectively, The third output oil passage is provided with ports on the first surface and the second surface, respectively, and the fourth output oil passage is provided with ports on the first surface and the second surface, respectively; The first oil inlet oil path, the first oil return oil path, the second oil inlet oil path, and the second oil return oil path are all provided with interfaces on the first surface; the first overflow Both the oil passage and the second overflow oil passage are provided with interfaces on the third surface.
12. The oil circuit control device according to claim 11, wherein the oil circuit control device further comprises a first three-position four-way reversing valve and a second three-position four-way reversing valve arranged on the first surface. The first three-position four-way reversing valve and the second three-position four-way reversing valve adopt M-type reversing valves; the first three-position four-way reversing valve corresponds to the The first output oil path, the second output oil path, the first oil inlet oil path, and the first oil return oil path are connected, and the second three-position four-way reversing valve is correspondingly connected to the The third output oil path, the fourth output oil path, the second oil inlet oil path, and the second oil return oil path are connected.
13. The oil passage control device according to claim 11, wherein the oil passage control device further comprises a first relief valve provided on the third surface, and the first relief valve is respectively connected to the The first overflow oil passage and the second overflow oil passage are connected.
14. The oil circuit control device according to claim 11, wherein the first surface and the third surface are respectively located on opposite sides of the valve block; the second surface is located on the first surface And the third surface.
15. The oil passage control device according to claim 11, wherein the first oil inlet oil passage and the second oil return oil passage are connected in a "V" shape.
16. The oil circuit control device according to any one of claims 11 to 15, wherein the valve block is also provided with a fifth output oil circuit, a sixth output oil circuit, a third oil inlet oil circuit, and a third oil circuit inside the valve block. Three oil return lines, seventh output oil lines, eighth output oil lines, fourth oil inlet lines, fourth oil return lines, third overflow oil lines, and fourth overflow oil lines; The oil return oil passage is in communication with the second oil inlet oil passage, the third overflow oil passage, the third oil inlet oil passage, and the fourth oil return oil passage are communicated with each other, and the fourth overflow oil passage is in communication with the fourth oil return oil passage. The fifth output oil path is respectively provided with interfaces on the first surface and the second surface, and the sixth output oil path is respectively provided on the first surface. An interface is provided with the second surface, the seventh output oil path is provided with an interface on the first surface and the second surface respectively, and the eighth output oil path is respectively provided on the first surface and the second surface. The second surface is provided with an interface; the third oil inlet path, the third oil return path, the fourth oil inlet path, and the fourth oil return path are all on the first surface An interface is provided; both the third overflow oil passage and the fourth overflow oil passage are provided with an interface on the third surface.
17. The oil circuit control device according to claim 16, wherein the oil circuit control device further comprises a third three-position four-way reversing valve and a fourth three-position four-way reversing valve arranged on the first surface. The third three-position four-way reversing valve and the fourth three-position four-way reversing valve adopt M-type reversing valve; the third three-position four-way reversing valve corresponds to the The fifth output oil path, the sixth output oil path, the third oil inlet oil path, and the third oil return oil path are connected, and the fourth three-position four-way reversing valve is correspondingly connected to the The seventh output oil passage, the eighth output oil passage, the fourth oil inlet oil passage, and the fourth oil return oil passage are connected; the oil passage control device further includes a device disposed on the third surface A second relief valve, and the second relief valve is respectively connected to the third relief oil passage and the fourth relief oil passage.
18. The oil passage control device according to claim 16, wherein the valve block is provided with a first installation groove, other system oil passages, and a fifth oil return oil passage inside the valve block, and the first installation groove communicates with the Between the other system oil path and the fifth oil return path, the other system oil path is connected to the fourth oil inlet path; the oil path control device further includes a third relief valve, the third The overflow valve is installed at the first installation groove.
19. The oil passage control device according to claim 18, wherein the valve block is provided with a second installation groove, a steering oil passage and a sixth oil return oil passage inside the valve block, and the second installation groove is connected to the Between the steering oil passage and the sixth oil return oil passage; the oil passage control device further includes a fourth overflow valve, and the fourth overflow valve is installed at the second installation groove.
20. The sweeper is characterized by comprising the oil circuit control device according to any one of claims 11 to 19.