阅读说明：本技术 一种边坡修剪机的液压系统 (Hydraulic system of side slope trimmer ) 是由 胡信平 马永胜 谷新昶 朱明� 张龙飞 刘德凯 马元 于 2021-09-16 设计创作，主要内容包括：本申请涉及一种边坡修剪机的液压系统,属于液压系统的领域,包括行走液压系统部分,所述行走液压系统部分包括行走液压马达以及朝行走液压马达内泵油的行走液压泵,所述行走液压泵为双向变量液压泵,行走液压泵的A口与行走液压马达的其中一个油口连接,行走液压泵的B口与行走液压马达的另一个油口连接,且所述行走液压泵还连接有控制其泵油方向以及泵油量的控制机构。工作人员在驱动边坡修剪机移动时,可通过双向变量泵朝行走马达处输送液压油以驱动行走马达工作,进而带动边坡修剪机移动。控制机构可通过调节行走液压泵的排量以实现对行走马达转速的无级调节,进而可灵活控制边坡修剪机的行走速度。(The utility model relates to a hydraulic system of side slope trimming machine belongs to hydraulic system's field, including walking hydraulic system part, walking hydraulic system part is including walking hydraulic motor and towards the walking hydraulic pump of walking hydraulic motor internal pump oil, the walking hydraulic pump is two-way variable hydraulic pump, and the A mouth of walking hydraulic pump is connected with one of them hydraulic fluid port of walking hydraulic motor, and the B mouth of walking hydraulic pump is connected with another hydraulic fluid port of walking hydraulic motor, just the walking hydraulic pump still is connected with the control mechanism who controls its pump oil direction and pump oil volume. When the worker drives the slope trimmer to move, the hydraulic oil can be conveyed towards the walking motor through the bidirectional variable pump to drive the walking motor to work, and then the slope trimmer is driven to move. The control mechanism can realize stepless regulation of the rotating speed of the walking motor by regulating the discharge capacity of the walking hydraulic pump, and further can flexibly control the walking speed of the slope trimmer.)

1. A hydraulic system of a slope trimmer is characterized in that: the hydraulic brake system comprises a walking hydraulic system part (100), a working hydraulic system part (200) and an auxiliary hydraulic system part (300), wherein the walking hydraulic system part (100) comprises a walking hydraulic motor (150) and a walking hydraulic pump (110) for pumping oil towards the inside of the walking hydraulic motor (150), the walking hydraulic pump (110) is a bidirectional variable hydraulic pump, an A port of the walking hydraulic pump (110) is connected with one oil port of the walking hydraulic motor (150), a B port of the walking hydraulic pump (110) is connected with the other oil port of the walking hydraulic motor (150), the walking hydraulic motor (150) is provided with a first brake overflow valve (151) and a second brake overflow valve (152) in parallel, the walking hydraulic motor (150) is further provided with a shuttle valve (153) in parallel, the hot oil shuttle valve (153) is connected with a flushing overflow valve (154), an oil outlet of the flushing overflow valve (154) is connected with a fixed throttle valve (155), and the fixed throttle valve (155) is connected with the oil tank, and the traveling hydraulic pump (110) is also connected with a control mechanism for controlling the oil pumping direction and the oil pumping amount.

2. The hydraulic system of a slope trimmer according to claim 1, wherein: the control mechanism comprises an oil supplementing pump (120) and an electro-hydraulic proportional direction throttle valve (160), the oil supplementing pump (120) fetches oil from a hydraulic oil tank (500), an oil inlet of the electro-hydraulic proportional direction throttle valve (160) is connected with an oil outlet of the oil supplementing pump (120), and two oil outlets of the electro-hydraulic proportional direction throttle valve (160) are connected with the traveling hydraulic pump (110) to control the angle of a swash plate of the traveling hydraulic pump.

3. The hydraulic system of a slope trimmer according to claim 1, wherein: the working hydraulic system part (200) comprises a working hydraulic pump (240) and a working hydraulic motor (210), the oil outlet of the working hydraulic pump (240) is provided with two paths, one path is connected with a working overflow valve (220), the other path is connected with a working electromagnetic directional valve (230), the oil outlet of the working electromagnetic directional valve (230) is connected with the oil port of the working hydraulic motor (210), the oil outlet of the working overflow valve (220) and the oil return port of the working electromagnetic directional valve (230) are communicated with each other and are connected with a radiator (400), and the radiator (400) is connected with a hydraulic oil tank (500).

4. The hydraulic system of a slope trimmer according to claim 3, wherein: the auxiliary hydraulic system part (300) comprises an auxiliary electromagnetic overflow valve (310), an electromagnetic valve group and an auxiliary execution assembly, wherein the auxiliary electromagnetic overflow valve (310) is connected with an auxiliary hydraulic pump (320), an oil outlet of the auxiliary hydraulic pump (320) is divided into two paths, one path of oil inlet is connected with the auxiliary electromagnetic overflow valve (310), the other path of oil inlet is connected with the oil inlet of the electromagnetic valve group, an oil return port of the electromagnetic valve group is connected with a radiator (400), the electromagnetic valve group comprises a rotary electromagnetic reversing valve (381), the auxiliary execution assembly comprises a rotary hydraulic motor (380), the oil outlet of the auxiliary hydraulic pump (320) is connected with the oil inlet of the rotary electromagnetic reversing valve (381), the rotary electromagnetic reversing valve (381) is connected with the rotary hydraulic motor (380), and the oil return port of the auxiliary electromagnetic overflow valve (310) is connected with the radiator (400).

5. The hydraulic system of a slope trimmer according to claim 4, wherein: and a two-way overflow valve (382) is connected to an oil path between the rotary hydraulic motor (380) and the rotary electromagnetic directional valve (381).

6. The hydraulic system of a slope trimmer according to claim 5, wherein: the auxiliary execution assembly comprises a first swing hydraulic cylinder (3501) and a second swing hydraulic cylinder (3502), the electromagnetic valve group further comprises a pair of swing electromagnetic directional valves (351), the first swing hydraulic cylinder (3501) and the second swing hydraulic cylinder (3502) are respectively and independently connected with one swing electromagnetic directional valve (351), an oil outlet of the auxiliary hydraulic pump (320) is connected with an oil inlet of the swing electromagnetic directional valve (351), and an oil return port of the swing electromagnetic directional valve (351) is connected with the radiator (400).

7. The hydraulic system of a slope trimmer according to claim 6, wherein: the auxiliary execution assembly further comprises a large-arm telescopic hydraulic cylinder (340), the electromagnetic valve group further comprises a large-arm telescopic electromagnetic directional valve (341), an oil outlet of the auxiliary hydraulic pump (320) is connected with an oil inlet of the large-arm telescopic electromagnetic directional valve (341), and the large-arm telescopic electromagnetic directional valve (341) is connected with the large-arm telescopic hydraulic cylinder (340).

8. The hydraulic system of a slope trimmer according to claim 7, wherein: the auxiliary execution assembly further comprises a suspension arm supporting hydraulic cylinder (330), the electromagnetic valve group further comprises a suspension arm supporting electromagnetic directional valve (331), an oil outlet of the auxiliary hydraulic pump (320) is connected with an oil inlet of the suspension arm supporting electromagnetic directional valve (331), and the suspension arm supporting electromagnetic directional valve (331) is connected with the suspension arm supporting hydraulic cylinder (330).

9. The hydraulic system of a slope trimmer according to claim 8, wherein: the auxiliary execution assembly further comprises a tool apron angle hydraulic cylinder (360), the electromagnetic valve group further comprises a tool apron angle electromagnetic directional valve (363), an oil outlet of the auxiliary hydraulic pump (320) is connected with an oil inlet of the tool apron angle electromagnetic directional valve (363), and the tool apron angle electromagnetic directional valve (363) is connected with the tool apron angle hydraulic cylinder (360).

10. The hydraulic system of a slope trimmer according to claim 9, wherein: and an oil return filter (600) is connected in series between the radiator (400) and the hydraulic oil tank (500).

Technical Field

The application relates to the field of hydraulic systems, in particular to a hydraulic system of a slope trimmer.

Background

Along with the rapid development of the expressway and the increasing of the environmental protection requirement, the requirement of the expressway slope greening is stricter and stricter, the workload is large, the working strength is high, and the mechanical construction gradually replaces manual operation.

In the related art, for example, a comprehensive greening maintenance vehicle is provided in Chinese patent with publication number CN108966895A and publication date of 2018, 12 and 11. Including the automobile body, be connected with the side slope trimmer on the automobile body, the side slope trimmer includes the workstation of being connected with automobile body sub vehicle frame rotation, the flexible arm that one end and workstation articulated set up, and the flexible arm other end is connected with rolls over the arm, rolls over the arm and keeps away from the one end of flexible arm and is provided with the blade holder, is provided with the pruning blade that is used for pruning the grass and trees in the blade holder.

During operation, the automobile body removes, and operating personnel is through adjusting flexible wall and roll over the arm so that the trimming blade of blade holder department acts on the vegetation to prune the vegetation.

With respect to the related art among the above, the inventors consider that the following drawbacks exist: the maintenance vehicle is usually driven by an engine to run, and the running speed is difficult to adjust and control.

Disclosure of Invention

In order to facilitate the adjustment of the movement speed of the slope trimmer by workers, the application provides a hydraulic system of the slope trimmer.

The application provides a hydraulic system of side slope trimming machine adopts following technical scheme:

the utility model provides a hydraulic system of side slope trimming machine, includes walking hydraulic system part, walking hydraulic system part is including walking hydraulic motor and towards the walking hydraulic pump of walking hydraulic motor inner pump oil, the walking hydraulic pump is two-way variable hydraulic pump, and the A mouth of walking hydraulic pump is connected with one of them hydraulic fluid port of walking hydraulic motor, and the B mouth of walking hydraulic pump is connected with another hydraulic fluid port of walking hydraulic motor, just the walking hydraulic pump still is connected with the control mechanism who controls its pump oil direction and pump oil volume.

Through adopting above-mentioned technical scheme, when the staff was removing at the drive side slope trimming machine, accessible two-way variable pump carried hydraulic oil towards walking motor department with drive walking motor work, and then drove the side slope trimming machine and remove. The control mechanism can realize stepless regulation of the rotating speed of the walking motor by regulating the discharge capacity of the walking hydraulic pump, so that the walking speed of the slope trimmer can be flexibly controlled, and meanwhile, the control mechanism controls the rotating direction of the walking hydraulic motor by controlling the oil pumping direction of the walking hydraulic pump.

Optionally, the control mechanism includes an oil supply pump and an electro-hydraulic proportional directional throttle valve, the oil supply pump takes oil from the hydraulic oil tank, an oil inlet of the electro-hydraulic proportional directional throttle valve is connected with an oil outlet of the oil supply pump, and two oil outlets of the electro-hydraulic proportional directional throttle valve are connected with the traveling hydraulic pump to control the angle of a swash plate of the electro-hydraulic proportional directional throttle valve.

By adopting the technical scheme, the flow and the flow direction of the hydraulic oil flowing through the electro-hydraulic proportional direction throttling valve are adjusted, so that the slope angle of the walking hydraulic pump is adjusted, the oil pumping amount and the oil pumping direction of the bidirectional variable pump are adjusted, and the purpose of stepless speed regulation is achieved.

Optionally, the hydraulic system further includes a working hydraulic system part, the working hydraulic system part includes a working hydraulic pump and a working hydraulic motor, an oil outlet of the working hydraulic pump is provided with two paths, wherein one path is connected with a working overflow valve, the other path is connected with a working electromagnetic directional valve, an oil outlet of the working electromagnetic directional valve is connected with an oil port of the working hydraulic motor, an oil outlet of the working overflow valve and an oil return port of the working electromagnetic directional valve are communicated with each other and connected with a radiator, and the radiator is connected with a hydraulic oil tank.

Through adopting above-mentioned technical scheme, work hydraulic pump drive work hydraulic motor rotates, and then makes work hydraulic motor can drive the blade rotation that is used for pruning. The arrangement of the working overflow valve can enable the oil circuit in the working hydraulic system part to be more stable, when the trimmed blade impacts hard objects during working, the working overflow valve can protect the oil circuit of the system to a certain extent, and the service life of the working hydraulic system part is prolonged. The radiator can play a certain role in radiating hydraulic oil in the working hydraulic system part so as to improve the working stability of the hydraulic oil. The working electromagnetic directional valve can facilitate the working personnel to control the working state of the working hydraulic motor, and the adjustability of the system is improved.

Optionally, the hydraulic system further comprises an auxiliary hydraulic system part, the auxiliary hydraulic system part comprises an auxiliary electromagnetic overflow valve, an electromagnetic valve bank and an auxiliary execution assembly, the auxiliary electromagnetic overflow valve is connected with an auxiliary hydraulic pump, an oil outlet of the auxiliary hydraulic pump is divided into two paths, one path of the oil outlet is connected with an oil inlet of the auxiliary electromagnetic overflow valve, the other path of the oil outlet is connected with an oil inlet of the electromagnetic valve bank, an oil return port of the electromagnetic valve bank is connected with the radiator, the electromagnetic valve bank comprises a rotary electromagnetic directional valve, the auxiliary execution assembly comprises a rotary hydraulic motor, an oil inlet of the oil outlet rotary electromagnetic directional valve of the auxiliary hydraulic pump is connected, the rotary electromagnetic directional valve is connected with the rotary hydraulic motor, and the oil return port of the auxiliary electromagnetic overflow valve is communicated with the radiator.

By adopting the technical scheme, the auxiliary electromagnetic overflow valve can be used for controlling the oil pressure in the whole auxiliary hydraulic system part so as to protect the whole auxiliary hydraulic system part. The auxiliary hydraulic pump can be used for driving the rotary hydraulic motor to rotate and providing driving force for driving the rotary motor to work. The arrangement of the rotary electromagnetic reversing valve can facilitate the workers to adjust the specific working state of the rotary hydraulic motor, so as to improve the adjustability of the system.

Optionally, an oil path between the rotary hydraulic motor and the rotary electromagnetic directional valve is connected with a two-way overflow valve.

By adopting the technical scheme, the oil pressure of the hydraulic oil flowing into the rotary hydraulic motor can be kept stable through the bidirectional overflow valve. When the hydraulic motor rotates and meets external strong resistance, the bidirectional overflow valve can play a role in stabilizing the pressure and prevent overload so as to protect the rotary hydraulic motor.

Optionally, the auxiliary execution assembly comprises a first swing hydraulic cylinder and a second swing hydraulic cylinder, the solenoid valve bank further comprises a pair of swing electromagnetic directional valves, the first swing hydraulic cylinder and the second swing hydraulic cylinder are both independently connected with one swing electromagnetic directional valve, an oil outlet of the auxiliary hydraulic pump is connected with an oil inlet of the swing electromagnetic directional valve, and an oil return port of the swing electromagnetic directional valve is connected with the radiator.

By adopting the technical scheme, the flow direction of the hydraulic oil entering the first swing hydraulic cylinder or the second swing hydraulic cylinder can be controlled by swinging the electromagnetic directional valve, and then the rotation direction of the first swing hydraulic cylinder or the second swing hydraulic cylinder is controlled.

Optionally, the auxiliary execution assembly further comprises a large-arm telescopic hydraulic cylinder, the electromagnetic valve group further comprises a large-arm telescopic electromagnetic directional valve, an oil outlet of the auxiliary hydraulic pump is connected with an oil inlet of the large-arm telescopic electromagnetic directional valve, and the large-arm telescopic electromagnetic directional valve is connected with the large-arm telescopic hydraulic cylinder.

By adopting the technical scheme, the large arm telescopic electromagnetic reversing can be used for controlling the oil inlet and outlet conditions in the large arm telescopic hydraulic cylinder, so that a piston rod of the large arm telescopic hydraulic cylinder extends, contracts or keeps still.

Optionally, the auxiliary execution assembly further comprises a boom supporting hydraulic cylinder, the electromagnetic valve group further comprises a boom supporting electromagnetic directional valve, an oil outlet of the auxiliary hydraulic pump is connected with an oil inlet of the boom supporting electromagnetic directional valve, and the boom supporting electromagnetic directional valve is connected with the boom supporting hydraulic cylinder.

By adopting the technical scheme, the suspension arm supporting electromagnetic directional valve can be used for controlling the working state of the suspension arm supporting hydraulic cylinder.

Optionally, the auxiliary execution assembly further includes a tool apron angle hydraulic cylinder, the electromagnetic valve group further includes a tool apron angle electromagnetic directional valve, an oil outlet of the auxiliary hydraulic pump is connected with an oil inlet of the tool apron angle electromagnetic directional valve, and the tool apron angle electromagnetic directional valve is connected with the tool apron angle hydraulic cylinder.

Through adopting above-mentioned technical scheme, through the operating condition of the steerable blade holder angle pneumatic cylinder of blade holder angle solenoid directional valve to make the piston rod of blade holder angle pneumatic cylinder stretch, contract or keep motionless, and then make the blade holder rotate, so that the better effect of blade holder is in the vegetation that needs to be pruned.

Optionally, an oil return filter is connected in series between the radiator and the hydraulic oil tank.

By adopting the technical scheme, the hydraulic oil in the hydraulic system is easy to mix with particles when working for a long time, so that the working performance of the hydraulic oil is easy to influence. The oil return filter can play a certain role in filtering particles in the hydraulic oil so as to improve the working performance of the hydraulic oil.

In summary, the present application includes at least one of the following advantageous technical effects:

1. setting of a walking hydraulic system part: when the worker drives the slope pruning machine to move, hydraulic oil can be conveyed towards the walking motor through the bidirectional variable pump to drive the walking motor to work, and then the slope pruning machine is driven to move. The control mechanism can realize stepless regulation of the rotating speed of the walking motor by regulating the discharge capacity of the bidirectional variable hydraulic pump, so that the walking speed of the slope trimmer can be flexibly controlled;

2. the working hydraulic pump drives the working hydraulic motor to rotate, so that the working hydraulic motor can drive the blade for trimming to rotate. The arrangement of the working overflow valve can enable the oil circuit in the working hydraulic system part to be more stable, when the trimmed blade impacts hard objects during working, the working overflow valve can protect the oil circuit of the system to a certain extent, and the service life of the working hydraulic system part is prolonged. The radiator can play a certain role in radiating hydraulic oil in the working hydraulic system part so as to improve the working stability of the hydraulic oil. The working electromagnetic directional valve can facilitate the working personnel to control the working state of the working hydraulic motor, and the adjustability of the system is improved.

Drawings

FIG. 1 is a schematic diagram of the overall structure of a hydraulic system in an embodiment of the present application;

FIG. 2 is a schematic structural diagram of a walking hydraulic system part in the embodiment of the application;

FIG. 3 is a schematic structural diagram of a working hydraulic system portion in an embodiment of the present application;

FIG. 4 is a schematic diagram of the structure of the auxiliary hydraulic system portion in the embodiment of the present application;

FIG. 5 is a schematic view of the connection of the hydraulic cylinder of the support leg in the embodiment of the present application.

Description of reference numerals: 100. a traveling hydraulic system section; 110. a traveling hydraulic pump; 120. an oil replenishing pump; 150. a traveling hydraulic motor; 151. a first brake relief valve; 152. a second brake relief valve; 153. a hot oil shuttle valve; 154. flushing the overflow valve; 155. a fixed throttle valve; 160. an electro-hydraulic proportional directional throttle valve; 170. controlling an overflow valve; 180. a first oil-supplementing one-way valve; 190. a second oil-supplementing one-way valve; 200. a working hydraulic system part; 210. a working hydraulic motor; 220. a working overflow valve; 230. a working electromagnetic directional valve; 240. a working hydraulic pump; 300. an auxiliary hydraulic system portion; 310. an auxiliary electromagnetic spill valve; 320. an auxiliary hydraulic pump; 330. a boom support hydraulic cylinder; 331. the suspension arm supports the electromagnetic directional valve; 332. a suspension arm bidirectional throttle valve; 333. a suspension arm hydraulic control one-way valve; 340. a large arm telescopic hydraulic cylinder; 341. a large arm telescopic electromagnetic directional valve; 342. a large arm balance valve; 343. a large arm bidirectional throttle valve; 3501. a first swing hydraulic cylinder; 3502. a second swing hydraulic cylinder; 351. oscillating the solenoid directional valve; 352. a swing balancing valve; 353. a swinging bidirectional throttle valve; 360. a tool apron angle hydraulic cylinder; 361. a cutter holder bidirectional throttle valve; 362. a cutter holder hydraulic control one-way valve; 363. a tool apron angle electromagnetic directional valve; 370. a support leg hydraulic cylinder; 371. a support leg electromagnetic directional valve; 372. a support leg hydraulic control one-way valve; 373. a leg overflow valve; 374. a pressure relay; 380. a rotary hydraulic motor; 381. a rotary electromagnetic directional valve; 382. a two-way relief valve; 400. a heat sink; 500. a hydraulic oil tank; 600. and an oil return filter.

Detailed Description

The present application is described in further detail below with reference to figures 1-5.

The embodiment of the application discloses hydraulic system of a side slope trimmer. Referring to fig. 1, a hydraulic system of a slope trimmer includes a traveling hydraulic system portion 100, a working hydraulic system portion 200, and an auxiliary hydraulic system portion 300. The walking hydraulic system part 100 is used for driving the slope trimmer to move integrally. The working hydraulic system section 200 is used to control the rotation of the trimming blade for the side slope trimmer to perform the trimming operation. The auxiliary hydraulic system portion 300 is used to assist the operation of the slope trimmer so that the slope trimmer can accommodate a variety of operating conditions.

Referring to fig. 1 and 2, the traveling hydraulic system part 100 includes a traveling hydraulic pump 110 and a traveling hydraulic motor 150 connected to the traveling hydraulic pump 110. The traveling hydraulic pump 110 is a bidirectional variable hydraulic pump, an a port of the traveling hydraulic pump 110 is connected to one of the oil ports of the traveling hydraulic motor 150, and a B port of the traveling hydraulic pump 110 is connected to the other oil port of the traveling hydraulic motor 150, so that the traveling hydraulic motor 150 is controlled to rotate by the traveling hydraulic pump 110. In order to improve the safety of the operation of the traveling hydraulic pump 110, the traveling hydraulic motor 150 is provided with a first brake relief valve 151 and a second brake relief valve 152 in parallel, and the pressure value thereof is 270 Bar.

The walking hydraulic motor 150 is further provided with a hot oil shuttle valve 153 in parallel, the hot oil shuttle valve 153 is connected with a flushing overflow valve 154, an oil outlet of the flushing overflow valve 154 is connected with a fixed throttle valve 155, and the fixed throttle valve 155 is connected with an oil tank. When the hydraulic oil on the side of the traveling hydraulic motor 150 has a high oil pressure, the hydraulic oil on the low-pressure side may flow into the oil tank through the hot oil shuttle valve 153 and the flushing relief valve 154 to displace the hot oil in the oil path and displace impurities in the oil path into the oil tank, so that the hydraulic oil stably operates in the oil path.

In order to facilitate the adjustment of the rotation speed and the rotation direction of the walking hydraulic motor 120 by the operator, the walking hydraulic pump 110 is further connected with a control mechanism for controlling the oil pumping amount and the oil pumping direction thereof. The control mechanism comprises an oil supplementing pump 120 and an electro-hydraulic proportional direction throttle valve 160, an oil inlet of the electro-hydraulic proportional direction throttle valve 160 is connected with an oil outlet of the oil supplementing pump 120, and the oil supplementing pump 120 takes oil from the hydraulic oil tank 500. An oil outlet of the electro-hydraulic proportional direction throttle valve 160 is connected to a piston of the traveling hydraulic pump 110 to control a swash plate of the traveling hydraulic pump 110 to rotate, thereby realizing adjustment of the oil pumping amount and the oil pumping direction of the traveling hydraulic pump 110.

A control overflow valve 170 is also connected in parallel in an oil path between the electro-hydraulic proportional direction throttle valve 160 and the traveling hydraulic pump 110, the traveling hydraulic pump 110 is provided with a cooling oil cavity, an oil outlet of the control overflow valve 170 is connected with an oil inlet of the cooling oil cavity, and hydraulic oil flowing out of the control overflow valve 170 can cool the traveling hydraulic pump 110. The control overflow valve 170 is also connected in parallel with a first oil-replenishing check valve 180 and a second oil-replenishing check valve 190. The first oil supplementing check valve 180 is communicated with an oil path connected with the traveling hydraulic motor 150 through the port a of the traveling hydraulic pump 110, and the second oil supplementing check valve 190 is communicated with an oil path connected with the port B of the traveling hydraulic pump 110 and the traveling hydraulic motor 150, so that oil is supplemented to the traveling hydraulic motor 150, and the traveling hydraulic motor 150 can work more stably.

Referring to fig. 2 and 3, the working hydraulic system portion 200 includes a working hydraulic pump 240 and a working hydraulic motor 210 connected to the working hydraulic pump 240. The working hydraulic pump 240 is a one-way quantitative hydraulic pump, two paths of oil outlets of the working hydraulic pump 240 are arranged, one path of the oil outlet is connected with the working overflow valve 220, so that hydraulic pressure in the working hydraulic system part 200 is kept in a stable state, and further, the occurrence of working accidents and the damage of equipment are reduced. The other path of the oil outlet is connected with a working electromagnetic directional valve 230, and the working electromagnetic directional valve 230 is connected with the working hydraulic motor 210 to control the working state of the working hydraulic motor 210. Specifically, the working electromagnetic directional valve 230 is a three-position four-way electromagnetic directional valve with an H-shaped neutral function, the working electromagnetic directional valve 230 is connected with the working hydraulic motor 210, the working hydraulic motor 210 is connected with the trimming blade of the slope trimmer, and the rotation direction of the working hydraulic motor 210 and whether the rotation operation is performed or not can be controlled by adjusting the position of the valve core in the working electromagnetic directional valve 230, so as to control the working state of the trimming blade of the slope trimmer. The working overflow valve 220 and the working electromagnetic directional valve 230 have oil return ports communicated with each other and are connected in series with a radiator 400, and the radiator 400 is connected with a hydraulic oil tank 500. The radiator 400 can radiate the hydraulic oil in the oil return path, thereby reducing the temperature of the hydraulic oil and improving the working stability of the hydraulic oil.

During operation, the hydraulic pump 240 supplies oil to the hydraulic motor 210 to drive the hydraulic motor 210 to rotate, and the hydraulic motor 210 drives the trimming blade to rotate to perform trimming operation. When the trimming blade touches hard objects in operation, the working relief valve 220 can keep the hydraulic oil in the oil circuit of the working hydraulic system part 200 stable, thereby protecting the working hydraulic motor 210 and avoiding the trimming blade from being damaged due to violent trimming. The working electromagnetic directional valve 230 may be used to adjust the flow direction of hydraulic oil in the working hydraulic system portion 200 so that the worker adjusts the working state of the working hydraulic pump 240.

Referring to fig. 3 and 4, the auxiliary hydraulic system portion 300 includes an auxiliary electromagnetic spill valve 310, a solenoid valve group, and an auxiliary actuator assembly. The auxiliary electromagnetic overflow valve 310 is connected with an auxiliary hydraulic pump 320, the auxiliary hydraulic pump 320 is a one-way quantitative hydraulic pump, and the auxiliary hydraulic pump 320 obtains hydraulic oil from the hydraulic oil tank 500. The oil outlet of the auxiliary hydraulic pump 320 is divided into two paths, wherein one path is connected with the oil inlet of the auxiliary electromagnetic overflow valve 310, the other path is connected with the oil inlet of the electromagnetic valve bank, and the oil return port of the electromagnetic valve bank and the oil outlet of the auxiliary electromagnetic overflow valve 310 are connected with each other through a pipeline and communicated with the radiator 400.

Specifically, the electromagnetic valve group includes a rotary electromagnetic directional valve 381, and the rotary electromagnetic directional valve 381 is a three-position four-way electromagnetic directional valve with an O-shaped neutral position function. The auxiliary implement assembly includes a rotary hydraulic motor 380, and the rotary hydraulic motor 380 is connected with the worktable of the slope trimmer to control the rotation of the worktable, so as to adjust the working direction of the slope trimmer. An oil outlet of the auxiliary hydraulic pump 320 is connected with an oil inlet of a rotary electromagnetic directional valve 381, the rotary electromagnetic directional valve 381 is connected with a rotary hydraulic motor 380, and a two-way overflow valve 382 is further connected to an oil path between the rotary hydraulic motor 380 and the rotary electromagnetic directional valve 381, so that the oil pressure in the oil path is kept stable.

In operation, the auxiliary hydraulic pump 320 supplies oil to the oil path in the auxiliary hydraulic system portion 300, and the operator controls the flow of hydraulic oil through the rotary electromagnetic directional valve 381, so as to realize forward rotation, reverse rotation, and static state of the rotary hydraulic cylinder.

The auxiliary implement assembly further comprises a boom extension hydraulic cylinder 340, and the boom extension hydraulic cylinder 340 is used for controlling extension or contraction of the extension arm of the slope trimmer. The electromagnetic valve group further comprises a large arm telescopic electromagnetic directional valve 341, and the large arm telescopic electromagnetic directional valve 341 is a three-position four-way electromagnetic directional valve with a Y-shaped middle position function. An oil outlet of the auxiliary hydraulic pump 320 is connected with an oil inlet of the large-arm telescopic electromagnetic directional valve 341 through a pipeline, one oil outlet of the large-arm telescopic electromagnetic directional valve 341 is connected with a rod cavity of the large-arm telescopic hydraulic cylinder 340, and the other oil outlet of the large-arm telescopic electromagnetic directional valve 341 is connected with a rodless cavity of the large-arm telescopic hydraulic cylinder 340. By adjusting the position of the valve core in the large arm telescopic electromagnetic directional valve 341, the telescopic state of the piston rod of the large arm telescopic hydraulic cylinder 340 can be conveniently adjusted by a worker, so that the large arm of the slope trimmer can extend, contract or keep the length unchanged. An arm bidirectional throttle valve 343 and an arm balance valve 342 are sequentially added in an oil path between the arm telescopic electromagnetic directional valve 341 and the arm telescopic hydraulic cylinder 340, so that the arm telescopic hydraulic cylinder 340 can be more stable in operation.

The auxiliary execution assembly further comprises a boom support hydraulic cylinder 330 for connecting the workbench of the slope trimmer and the telescopic arm, and the boom support hydraulic cylinder 330 is used for controlling the telescopic arm to swing up and down. The solenoid valve block further includes a boom support solenoid directional valve 331 connected to the boom support hydraulic cylinder 330. Specifically, the boom support electromagnetic directional valve 331 is a three-position four-way electromagnetic directional valve with a Y-shaped median function, an oil outlet of the auxiliary hydraulic pump 320 is connected with an oil inlet of the boom support electromagnetic directional valve 331, one oil outlet of the boom support electromagnetic directional valve 331 is connected with a rodless cavity of the boom support hydraulic cylinder 330, and the other oil outlet of the boom support electromagnetic directional valve 331 is connected with a rod cavity of the boom support hydraulic cylinder 330. The oil return port of the boom support solenoid operated directional valve 331 is connected to the radiator 400 via a pipe. The piston rod of the boom support hydraulic cylinder 330 is extended to control the telescopic boom to move upwards, and the piston rod of the boom telescopic hydraulic cylinder is contracted to control the telescopic boom to move downwards.

The auxiliary executing assembly further comprises a first swing hydraulic cylinder 3501 and a second swing hydraulic cylinder 3502, wherein the central axis of the rotating output shaft of the first swing hydraulic cylinder 3501 is horizontally arranged at the end position of the telescopic arm and is perpendicular to the telescopic arm so as to control the folding arm at the end of the telescopic arm to rotate, and the rotating output shaft of the second swing hydraulic cylinder 3502 is parallel to the rotating output shaft of the first swing hydraulic cylinder 3502 and is perpendicular to the folding arm so as to control the tool apron at the end of the folding arm to rotate. The electromagnetic valve group further comprises a pair of swing electromagnetic directional valves 351, the first swing hydraulic cylinder 3501 and the second swing hydraulic cylinder 3502 are both connected with one swing electromagnetic directional valve 351, an oil outlet of the auxiliary hydraulic pump 320 is connected with an oil inlet of the swing electromagnetic directional valve 351, and an oil return port of the swing electromagnetic directional valve 351 is connected with the radiator 400. The swinging electromagnetic directional valve 351 is a three-position four-way electromagnetic directional valve with a Y-shaped middle position function. A swing two-way throttle valve 353 and a swing balance valve 352 are further added to an oil path between each swing electromagnetic directional valve 351 and the first swing hydraulic cylinder 3501 or the second swing hydraulic cylinder 3502 connected thereto, so that the hydraulic pressure in the oil path is kept stable.

The auxiliary execution assembly further comprises a tool apron angle hydraulic cylinder 360, and the electromagnetic valve group further comprises a tool apron angle electromagnetic directional valve 363 used for adjusting the working state of the tool apron angle hydraulic cylinder 360. The blade holder includes rectangular base and along its length direction perpendicular to base and with the articulated spliced pole that sets up of base, spliced pole one end second swing hydraulic cylinder 3502's rotatory output shaft fixed connection, blade holder angle pneumatic cylinder 360 sets up along spliced pole length direction, and blade holder angle pneumatic cylinder 360's piston rod sets up with the base is articulated, blade holder angle pneumatic cylinder 360's cylinder body and spliced pole welding. The tool apron angle electromagnetic directional valve 363 is a three-position four-way electromagnetic directional valve with a Y-shaped median function, an oil outlet of the auxiliary hydraulic pump 320 is connected with an oil inlet of the tool apron angle electromagnetic directional valve 363, one oil outlet of the tool apron angle electromagnetic directional valve 363 is connected with a rodless cavity of the tool apron angle hydraulic cylinder 360, and the other oil outlet of the tool apron angle electromagnetic directional valve 363 is connected with a rod cavity of the tool apron angle hydraulic cylinder 360. An oil path between the tool apron angle electromagnetic directional valve 363 and the tool apron angle hydraulic cylinder 360 is sequentially connected with a tool apron hydraulic control one-way valve 362 and a tool apron two-way throttle valve 361, so that the hydraulic pressure in the oil path is kept stable. When the piston rod of the knife holder angle hydraulic cylinder 360 stretches, the base rotates along the axial direction of the base, so that the trimming blade can better act on the vegetation.

Referring to fig. 3, 4 and 5, the auxiliary implement assembly further includes four leg hydraulic cylinders 370 for supporting the slope trimmer chassis, and the solenoid valve block further includes four leg solenoid directional valves 371. The support leg electromagnetic directional valves 371 are three-position four-way electromagnetic directional valves with Y-shaped neutral positions, and each support leg hydraulic cylinder 370 is connected with one support leg electromagnetic directional valve 371 to form a group of support leg groups. The oil outlet of the auxiliary hydraulic pump 320 is respectively connected with the oil inlet of the landing leg electromagnetic directional valve 371, one oil outlet of the landing leg electromagnetic directional valve 371 is connected with the rodless cavity of the corresponding landing leg hydraulic cylinder 370, the other oil outlet of the landing leg electromagnetic directional valve 371 is connected with the rod cavity of the corresponding landing leg hydraulic cylinder 370, and the oil return ports of the landing leg electromagnetic directional valve 371 are connected with the radiator 400 through pipelines. All be connected with landing leg liquid accuse check valve 372 in every group landing leg group, landing leg liquid accuse check valve 372 is located between landing leg electromagnetic directional valve 371 and landing leg pneumatic cylinder 370, and still is connected with landing leg overflow valve 373 and pressure relay 374 between landing leg liquid accuse check valve 372 and the landing leg pneumatic cylinder 370.

When the slope trimmer encounters uneven road surfaces, workers can control the extension and retraction of the support leg hydraulic cylinder 370 through the support leg electromagnetic directional valve 371 so as to support the chassis and keep the slope trimmer stable and not prone to overturn. In order to filter the hydraulic oil in the loop to improve the working quality of the hydraulic oil in the system, an oil return filter 600 is connected in series between the radiator 400 and the hydraulic oil tank 500.

The implementation principle of the embodiment of the application is as follows: the traveling hydraulic pump 110 operates to control the rotation speed of the traveling hydraulic motor 150 by adjusting the electro-hydraulic proportional direction throttle valve, and thus the overall operation speed of the side slope trimmer can be adjusted steplessly. When the rotary hydraulic motor works, the auxiliary hydraulic pump 320 provides hydraulic oil, the auxiliary electromagnetic overflow valve 310 adjusts the oil pressure of a loop in the auxiliary hydraulic system part 300 to play a certain protection role on an oil path, and the working state of the rotary hydraulic motor 380 can be controlled by adjusting the position of a valve core of the rotary electromagnetic directional valve 381. Meanwhile, the working state of the large arm telescopic hydraulic cylinder 340 can be changed by adjusting the large arm telescopic electromagnetic directional valve 341, so that the telescopic arm can extend or contract, and meanwhile, the length of the telescopic arm can be kept unchanged. The staff is through adjusting the case position of two swing solenoid directional valves 351 to the arm that rolls over of control slope trimmer takes place to rotate with flexible arm, or makes blade holder and roll over the arm and take place relative rotation, and then the staff of being convenient for adjusts the working angle of blade holder. Meanwhile, the work angle of the cutter holder can be controlled by adjusting the angle of the cutter holder electromagnetic directional valve 363, so that the work angle can be better acted on the grass and the trees, and the trimming effect is improved.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.