Hydraulic oil way system of electric control land leveler

Abstract

The utility model relates to the technical field of land levelers, in particular to a hydraulic oil way system of an electric control land leveler. A first oil outlet of a priority steering valve is connected with a steering gear, a second oil outlet of the priority steering valve is connected with a left multi-way valve set, and due to the fact that in the steering process of the land leveler, corresponding oil cylinders controlled by the left multi-way valve set cannot be operated at the same time generally, a first oil suction pump can be shared; when steering is needed, oil is supplied to the first oil suction pump preferentially, when steering is stopped, if corresponding oil cylinders connected with the left multi-way valve need to be supplied with oil, the steering priority valve supplies oil to the left multi-way valve from a second oil outlet, and the right multi-way valve set independently leads out a second oil suction pipe from the hydraulic oil tank and independently uses a second liquid pump to supply oil. According to the system, oil supply of the steering gear and the ten oil cylinders can be achieved only through two small-displacement liquid pumps, through reasonable oil way distribution, a hydraulic oil way system is simplified, and cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of land graders, in particular to a hydraulic oil circuit system of an electric-controlled land grader. Background Art

[0002] Graders are mainly used for leveling large sites or roads. The existing hydraulic oil circuit system of graders generally includes a steering hydraulic system, a left multi-way valve hydraulic system and a right multi-way valve hydraulic system. Each system requires a separate pump to supply oil independently. This structure easily leads to a complex hydraulic system and increased costs. The Chinese patent application publication number CN111576513A discloses a grader flow control system, method, controller and grader, which integrates multiple systems and controls them through a multi-way valve. Although only one electronically controlled pump is needed to supply oil to the multi-way valve, this structure requires the use of an electronically controlled pump with a larger displacement, which also increases costs.

[0003] Therefore, it is urgent to improve the hydraulic oil circuit system of the electric grader, simplify the hydraulic oil circuit system and reduce costs by reasonably allocating the oil circuit. Utility Model Content

[0004] The technical problem to be solved by the utility model is that it is urgent to improve the hydraulic oil circuit system of the electric control grader, simplify the hydraulic oil circuit system and reduce the cost by reasonably distributing the oil circuit.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0006] The hydraulic oil system of the electric grader includes:

[0007] Hydraulic oil tank;

[0008] A first oil suction pipe, wherein a starting end of the first oil suction pipe is connected to a hydraulic oil tank;

[0009] a first liquid pump, the first liquid pump being connected to a first oil suction pipe;

[0010] A steering priority valve, wherein the oil inlet of the steering priority valve is connected to the end of the first oil suction pipe;

[0011] A steering gear, wherein the oil inlet end of the steering gear is connected to the first oil outlet of the steering priority valve through a pipeline;

[0012] A left multi-way valve group, wherein the oil inlet of the left multi-way valve group is connected to the second oil outlet of the steering priority valve through a pipeline; the left multi-way valve group is connected to the left blade lifting cylinder, the front bulldozer lifting cylinder, the blade lead-out cylinder, the shovel angle change cylinder and the rotary motor cylinder;

[0013] A second oil suction pipe, wherein a starting end of the second oil suction pipe is connected to the hydraulic oil tank;

[0014] a second liquid pump, the second liquid pump being connected to a second oil suction pipe;

[0015] The right multi-way valve group, the oil inlet of the right multi-way valve group is connected to the end of the second oil suction pipe through a pipeline; the right multi-way valve group is connected with a frame articulation cylinder, a blade swing cylinder, a front wheel tilt cylinder, a rear ripper lifting cylinder and a right blade lifting cylinder.

[0016] Furthermore, in the hydraulic oil circuit system structure of the above-mentioned electric-controlled grader, the left multi-way valve group is connected to a first controller, and the first controller is electrically connected to a first electric-controlled handle.

[0017] Furthermore, in the hydraulic oil circuit system structure of the above-mentioned electric-controlled grader, the left multi-way valve group is connected to a second controller, and the second controller is electrically connected to a second electric-controlled handle.

[0018] Furthermore, the hydraulic oil circuit system structure of the above-mentioned electric grader also includes a first oil return pipe, which includes a main pipe, a first branch pipe and a second branch pipe connected to each other, the first branch pipe is connected to the steering gear, the second branch pipe is connected to the steering priority valve, and the main pipe is connected to the hydraulic oil tank.

[0019] Furthermore, the hydraulic oil circuit system structure of the above-mentioned electric-controlled grader further includes a second oil return pipe, wherein the starting end of the second oil return pipe is connected to the left multi-way valve group, and the end thereof is connected to the hydraulic oil tank.

[0020] Furthermore, the hydraulic oil circuit system structure of the electric grader further includes a third oil return pipe, the starting end of which is connected to the right multi-way valve group, and the end of which is connected to the hydraulic oil tank.

[0021] Furthermore, in the hydraulic oil circuit system structure of the above-mentioned electric-controlled grader, the left blade lifting cylinder, the front bulldozer lifting cylinder, the rear ripper lifting cylinder and the right blade lifting cylinder are connected to a balance valve.

[0022] Furthermore, in the hydraulic oil circuit system structure of the above-mentioned electric-controlled grader, the blade swing cylinder and the front wheel tilt cylinder are connected with a hydraulic lock.

[0023] The beneficial effects of the utility model are as follows: in the hydraulic oil circuit system of the electric-controlled grader involved in the utility model, the steering gear is connected through the first oil outlet of the priority steering valve, and the second oil outlet is connected to the left multi-way valve group. Since the corresponding oil cylinders controlled by the left multi-way valve group are generally not operated simultaneously during the steering process of the grader, a first oil suction pump can be shared; when steering is required, oil is supplied to the first oil suction pump first, and when steering stops, if the corresponding oil cylinders connected to the left multi-way valve need to be supplied with oil, the steering priority valve supplies oil to the left multi-way valve from the second oil outlet, while the right multi-way valve group separately draws out a second oil suction pipe from the hydraulic oil tank, and uses the second liquid pump separately for oil supply, so that the system only needs two liquid pumps with smaller displacements to realize the oil supply of the steering gear and ten cylinders, and the hydraulic oil circuit system is simplified and the cost is reduced by reasonably allocating the oil circuit.

[0024] Furthermore, the left multi-way valve group and the right multi-way valve group are respectively controlled by electric control handles to improve the oil distribution accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of a hydraulic oil circuit system of an electric-controlled motor grader according to a specific implementation mode of the utility model;

[0026] Description of labels:

[0027] 1. Hydraulic oil tank;

[0028] 2. The first oil suction pipe;

[0029] 3. The first liquid pump;

[0030] 4. Steering priority valve;

[0031] 5. Steering gear;

[0032] 6. Left multi-way valve group; 61. Left blade lifting cylinder; 62. Front bulldozer lifting cylinder; 63. Blade lead-out cylinder; 64. Shovel angle change cylinder; 65. Rotary motor cylinder;

[0033] 7. Second oil suction pipe;

[0034] 8. Second liquid pump;

[0035] 9. Right multi-way valve group; 91. Frame articulation cylinder; 92. Blade swing cylinder; 93. Front wheel tilt cylinder; 94. Rear ripper lifting cylinder; 95. Right blade lifting cylinder;

[0036] 10. A first controller; 101. A first electric control handle;

[0037] 11. Second controller; 111. Second electric control handle;

[0038] 12, first oil return pipe; 121, first branch pipe; 122, second branch pipe; 123, main pipe;

[0039] 13. Second oil return pipe;

[0040] 14. The third oil return pipe;

[0041] 15. Balancing valve;

[0042] 16. Hydraulic lock. DETAILED DESCRIPTION

[0043] In order to explain the technical content, achieved objectives and effects of the present invention in detail, the following is an explanation in conjunction with the implementation modes and the accompanying drawings.

[0044] Please refer to Figure 1 The specific implementation of the utility model relates to a hydraulic oil circuit system of an electric-controlled grader, comprising:

[0045] Hydraulic oil tank 1;

[0046] A first oil suction pipe 2, wherein a starting end of the first oil suction pipe 2 is connected to the hydraulic oil tank 1;

[0047] A first liquid pump 3, wherein the first liquid pump 3 is connected to the first oil suction pipe 2;

[0048] A steering priority valve 4, wherein the oil inlet of the steering priority valve 4 is connected to the end of the first oil suction pipe 2;

[0049] A steering gear 5, wherein the oil inlet end of the steering gear 5 is connected to the first oil outlet of the steering priority valve 4 through a pipeline;

[0050] The left multi-way valve group 6, the oil inlet of the left multi-way valve group 6 is connected to the second oil outlet of the steering priority valve 4 through a pipeline; the left multi-way valve group 6 is connected to the left blade lifting cylinder 61, the front bulldozer lifting cylinder 62, the blade lead-out cylinder 63, the shovel angle change cylinder 64 and the rotary motor cylinder 65;

[0051] A second oil suction pipe 7, wherein a starting end of the second oil suction pipe 7 is connected to the hydraulic oil tank 1;

[0052] a second liquid pump 8, wherein the second liquid pump 8 is connected to the second oil suction pipe 7;

[0053] The right multi-way valve group 9, the oil inlet of the right multi-way valve group 9 is connected to the end of the second oil suction pipe 7 through a pipeline; the right multi-way valve group 9 is connected to the frame articulation cylinder 91, the blade swing cylinder 92, the front wheel tilt cylinder 93, the rear tiller lifting cylinder 94 and the right blade lifting cylinder 95.

[0054] In the above embodiment, the steering gear 5 is connected to the first oil outlet of the priority steering valve, and the second oil outlet is connected to the left multi-way valve group 6. Since the corresponding oil cylinders controlled by the left multi-way valve group 6 are generally not operated simultaneously during the steering process of the grader, a first oil suction pump can be shared; when steering is required, oil is supplied to the first oil suction pump first. When steering stops, if the corresponding oil cylinders connected to the left multi-way valve need to be supplied with oil, the steering priority valve 4 supplies oil to the left multi-way valve from the second oil outlet, while the right multi-way valve group 9 draws out a second oil suction pipe 7 from the hydraulic oil tank 1 alone, and uses the second liquid pump 8 alone to supply oil, so that the system only needs two smaller displacement liquid pumps to realize the oil supply of the steering gear 5 and ten cylinders.

[0055] As a preferred embodiment, the left multi-way valve group 6 is connected to a first controller 10 , and the first controller 10 is electrically connected to a first electric control handle 101 .

[0056] As a preferred embodiment, the left multi-way valve group 6 is connected to a second controller 11 , and the second controller 11 is electrically connected to a second electric control handle 111 .

[0057] In the above embodiments, the left multi-way valve group 6 and the right multi-way valve group 9 are controlled by electric control handles respectively to improve the oil distribution accuracy.

[0058] As a preferred embodiment, it also includes a first oil return pipe 12, which includes a main pipe 123, a first branch pipe 121 and a second branch pipe 122 that are interconnected. The first branch pipe 121 is connected to the steering gear 5, the second branch pipe 122 is connected to the steering priority valve 4, and the main pipe 123 is connected to the hydraulic oil tank 1.

[0059] In the above embodiment, since the steering gear 5 and the left multi-way valve group 6 share the first liquid pump 3, the return oil pipelines of the two can be merged into the main pipe 123 of the first return oil pipe 12 to connect to the hydraulic oil tank 1, reducing the number of return oil pipe interfaces of the hydraulic oil tank 1.

[0060] As a preferred embodiment, the hydraulic oil circuit system further includes a second oil return pipe 13 , the starting end of which is connected to the left multi-way valve group 6 , and the end of which is connected to the hydraulic oil tank 1 .

[0061] As a preferred embodiment, the hydraulic oil circuit system further includes a third oil return pipe 14 , the starting end of which is connected to the right multi-way valve group 9 , and the end of which is connected to the hydraulic oil tank 1 .

[0062] As a preferred embodiment, the left blade lifting cylinder 61 , the front bulldozer lifting cylinder 62 , the rear ripper lifting cylinder 94 and the right blade lifting cylinder 95 are connected to a balance valve 15 .

[0063] As a preferred embodiment, the blade swing cylinder 92 and the front wheel tilt cylinder 93 are connected to a hydraulic lock 16 .

[0064] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent transformations made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in the relevant technical field, are also included in the patent protection scope of the present invention.

Claims

1. The hydraulic oil circuit system of the electric grader is characterized by: include: Hydraulic oil tank; A first oil suction pipe, wherein a starting end of the first oil suction pipe is connected to a hydraulic oil tank; a first liquid pump, the first liquid pump being connected to a first oil suction pipe; A steering priority valve, wherein the oil inlet of the steering priority valve is connected to the end of the first oil suction pipe; A steering gear, wherein the oil inlet end of the steering gear is connected to the first oil outlet of the steering priority valve through a pipeline; A left multi-way valve group, wherein the oil inlet of the left multi-way valve group is connected to the second oil outlet of the steering priority valve through a pipeline; the left multi-way valve group is connected to the left blade lifting cylinder, the front bulldozer lifting cylinder, the blade lead-out cylinder, the shovel angle change cylinder and the rotary motor cylinder; A second oil suction pipe, wherein a starting end of the second oil suction pipe is connected to the hydraulic oil tank; a second liquid pump, the second liquid pump being connected to a second oil suction pipe; The right multi-way valve group, the oil inlet of the right multi-way valve group is connected to the end of the second oil suction pipe through a pipeline; the right multi-way valve group is connected with a frame articulation cylinder, a blade swing cylinder, a front wheel tilt cylinder, a rear ripper lifting cylinder and a right blade lifting cylinder.

2. The hydraulic oil circuit system of the electric grader according to claim 1, characterized in that: The left multi-way valve group is connected to a first controller, and the first controller is electrically connected to a first electric control handle.

3. The hydraulic oil circuit system of the electric grader according to claim 1, characterized in that: The left multi-way valve group is connected to a second controller, and the second controller is electrically connected to a second electric control handle.

4. The hydraulic oil circuit system of the electric grader according to claim 1, characterized in that: It also includes a first oil return pipe, which includes a main pipe, a first branch pipe and a second branch pipe connected to each other, the first branch pipe is connected to the steering gear, the second branch pipe is connected to the steering priority valve, and the main pipe is connected to the hydraulic oil tank.

5. The hydraulic oil circuit system of the electric grader according to claim 1, characterized in that: It also includes a second oil return pipe, the starting end of which is connected to the left multi-way valve group, and the end of which is connected to the hydraulic oil tank.

6. The hydraulic oil circuit system of the electric grader according to claim 1, characterized in that: It also includes a third oil return pipe, the starting end of which is connected to the right multi-way valve group, and the end of which is connected to the hydraulic oil tank.

7. The hydraulic oil circuit system of the electric grader according to claim 1, characterized in that: The left blade lifting cylinder, the front bulldozer lifting cylinder, the rear ripper lifting cylinder and the right blade lifting cylinder are connected with a balance valve.

8. The hydraulic oil circuit system of the electric grader according to claim 1, characterized in that: The blade swing oil cylinder and the front wheel tilt oil cylinder are connected with a hydraulic lock.

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