Hydraulic automatic parking control system and vehicle

Abstract

The utility model discloses a hydraulic automatic parking control system and a vehicle, the hydraulic automatic parking control system comprises a closed pump, an oil recharging pump and a parking control valve, the closed pump is used for supplying oil to walking wheels of the vehicle, and an outlet of the oil recharging pump is connected with a first control oil pipe and a second control oil pipe; the oil supplementing pump supplies oil to the first control oil pipe or the second control oil pipe so as to adjust the oil supply amount and the oil supply direction of the closed pump. The parking control valve is used for controlling braking of the walking wheels. The parking control valve comprises a first position and a second position, the walking wheels are braked when the parking control valve is located at the first position, and braking of the walking wheels is canceled when the parking control valve is located at the second position; when the oil supplementing pump supplies oil to the first control oil pipe or the second control oil pipe, the parking control valve is driven to be switched from the first position to the second position. According to the hydraulic automatic parking control system, automatic parking of the vehicle can be achieved, and the controllability and safety of the vehicle are improved.

Description

Technical Field

[0001] This utility model relates to the field of mining machinery technology, and in particular to a hydraulic automatic parking control system and vehicle. Background Technology

[0002] Hydraulic motor-driven four-wheel drive vehicles include a parking control valve for controlling vehicle braking; currently, parking control valves are typically electronically controlled. Before the vehicle moves, the parking control valve is energized, releasing the brakes and allowing the vehicle to move normally. After the vehicle reaches a designated location and stops, the parking control valve is de-energized, braking the vehicle. However, hydraulic motor-driven four-wheel drive vehicles require frequent starting and stopping on slopes, necessitating frequent control of the parking mechanism, resulting in poor maneuverability. If the parking mechanism is not engaged, the vehicle may experience slight rolling, affecting vehicle safety. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a hydraulic automatic parking control system that enables automatic parking of the vehicle, improving vehicle handling and safety.

[0004] This utility model also proposes a vehicle having the above-mentioned hydraulic automatic parking control system.

[0005] The hydraulic automatic parking control system according to a first aspect embodiment of the present invention includes:

[0006] A closed-loop pump used to supply oil to the wheels of a vehicle;

[0007] The replenishing pump has a first control oil pipe and a second control oil pipe connected to its outlet. The replenishing pump adjusts the oil supply volume and direction of the closed pump by supplying oil to the first control oil pipe or the second control oil pipe.

[0008] A parking control valve is used to control the braking of the driving wheels; the parking control valve has a first position and a second position, wherein the driving wheels are braked when the parking control valve is in the first position, and the driving wheels are braked when the parking control valve is in the second position;

[0009] The shuttle valve includes a first oil inlet, a second oil inlet, and an oil outlet. The first oil inlet is connected to the first control oil pipe, the second oil inlet is connected to the second control oil pipe, and the oil outlet is connected to the parking control valve.

[0010] Hydraulic oil in the first or second control oil pipe enters the parking control valve through the shuttle valve, driving the parking control valve to switch from a first position to a second position; the parking control valve is provided with a reset structure, which is used to drive the parking control valve to move from the second position to the first position and maintain it in the first position.

[0011] The hydraulic automatic parking control system according to the first aspect of the present invention has at least the following beneficial effects:

[0012] By connecting the first control oil pipe and the second control oil pipe, which are connected to the replenishing oil pump, to the parking control valve through a shuttle valve, the parking control valve releases the vehicle brake when hydraulic oil from the first or second control oil pipe enters the outlet pipe through the shuttle valve; when no hydraulic oil enters the outlet pipe, the parking control valve can reset in time and brake the vehicle, without the need for manual operation. This ensures the vehicle's handling and safety even when the vehicle frequently starts and stops on slopes.

[0013] According to some embodiments of the present invention, the hydraulic automatic parking control system further includes a control plunger, wherein the first control oil pipe and the second control oil pipe are both connected to the control plunger, and the control plunger is used to adjust the oil supply quantity and oil supply direction of the closed pump;

[0014] When the oil pressure in the first control oil pipe is equal to the oil pressure in the second control oil pipe, the control plunger drives the closed-loop pump to stop supplying oil to the traveling wheels, and the vehicle stops; when the oil pressure in the first control oil pipe is not equal to the oil pressure in the second control oil pipe, the control plunger drives the closed-loop pump to supply oil to the traveling wheels, thereby driving the traveling wheels to move, and the vehicle moves.

[0015] According to some embodiments of the present invention, the control plunger has a first control position, a second control position, and a third control position. When the control plunger is in the first control position, the closed-loop pump supplies oil to the traveling wheels to drive the vehicle forward; when the control plunger is in the third control position, the closed-loop pump supplies oil to the traveling wheels to drive the vehicle backward; when the control plunger is in the second control position, the closed-loop pump stops supplying oil to the traveling wheels.

[0016] According to some embodiments of this utility model, the second control position is located between the first control position and the third control position. When the oil pressure of the first control oil pipe is equal to the oil pressure of the second control oil pipe, the control plunger is in the second control position. When the oil pressure of the first control oil pipe is greater than the oil pressure of the second control oil pipe, the control plunger moves from the second control position to the third control position. When the oil pressure of the second control oil pipe is greater than the oil pressure of the first control oil pipe, the control plunger moves from the second control position to the first control position.

[0017] According to some embodiments of the present invention, the closed-loop pump supplies oil to the traveling wheel through a first oil circuit or a second oil circuit. The closed-loop pump supplies oil to the traveling wheel through the first oil circuit to drive the vehicle forward, and the closed-loop pump supplies oil to the traveling wheel through the second oil circuit to drive the vehicle backward.

[0018] According to some embodiments of the present invention, both the first oil circuit and the second oil circuit are equipped with overflow valves, which are used to limit the maximum pressure of the first oil circuit and the second oil circuit.

[0019] According to some embodiments of the present invention, the first oil inlet is connected to the first control oil pipe through a first oil inlet pipe, the second oil inlet is connected to the second control oil pipe through a second oil inlet pipe, and the oil outlet is connected to the parking control valve through an oil outlet pipe.

[0020] According to some embodiments of this utility model, the outlet end of the replenishing pump is connected to a third oil circuit, and the first oil inlet pipe and the second oil inlet pipe are both connected to the third oil circuit; a filter is installed in the third oil circuit.

[0021] According to some embodiments of the present invention, the first control oil pipe is equipped with a first forward / reverse proportional valve, and the second control oil pipe is equipped with a second forward / reverse proportional valve.

[0022] The vehicle according to the second aspect embodiment of the present invention adopts the above-described hydraulic automatic parking control system, and therefore has at least all the beneficial effects of the hydraulic automatic parking control system, which will not be elaborated here.

[0023] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0025] Figure 1 This is a schematic diagram of the hydraulic automatic parking control system according to the first aspect of this utility model;

[0026] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0027] Figure 3 for Figure 1 Enlarged view of point B in the middle.

[0028] Icon labels:

[0029] Closed-loop pump 100, first oil circuit 110, second oil circuit 120, relief valve 130;

[0030] Oil replenishment pump 200, first control oil line 210, first forward / reverse proportional valve 211, second control oil line 220, second forward / reverse proportional valve 221, third oil line 230, filter 240;

[0031] Parking control valve 300, reset structure 310;

[0032] Shuttle valve 400, first oil inlet pipe 410, second oil inlet pipe 420, oil outlet pipe 430;

[0033] Control plunger 500. Detailed Implementation

[0034] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0035] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, etc., indicating the directional or positional relationship, are based on the directional or positional relationship shown in the drawings and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0036] In the description of this utility model, "multiple" refers to two or more. The use of "first" and "second" is for distinguishing technical features only and should not be construed as indicating or implying relative importance, or implicitly indicating the number of technical features or their sequential relationship.

[0037] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0038] Reference Figures 1 to 3The hydraulic automatic parking control system of the first aspect of this utility model includes a closed-loop pump 100, a replenishing pump 200, and a parking control valve 300. The closed-loop pump 100 supplies oil to the vehicle's wheels to drive the vehicle. If the closed-loop pump 100 stops supplying oil to the wheels, the vehicle stops. The outlet of the replenishing pump 200 is connected to a first control oil pipe 210 and a second control oil pipe 220. The replenishing pump 200 adjusts the oil supply quantity and direction of the closed-loop pump 100 by supplying oil to the first control oil pipe 210 or the second control oil pipe 220. For example, if the replenishing pump 200 supplies oil to the first control oil pipe 210, the closed-loop pump 100 drives the wheels forward; if the replenishing pump 200 supplies oil to the second control oil pipe 220, the closed-loop pump 100 drives the wheels backward. In this embodiment, a first forward / reverse proportional valve 211 is installed on the first control oil pipe 210, and a second forward / reverse proportional valve 221 is installed on the second control oil pipe 220. The forward / reverse proportional valve is a hydraulic or pneumatic component used to control the direction and flow rate of fluid. Its main function is to precisely adjust the movement direction and speed of the actuator through electrical signals to achieve forward rotation, reverse rotation, and stepless speed regulation. In this embodiment, the first forward / reverse proportional valve 211 and the second forward / reverse proportional valve 221 are basically the same. The first forward / reverse proportional valve 211 is used to control the unit flow rate through the first control oil pipe 210, and the second forward / reverse proportional valve 221 is used to control the unit flow rate through the second control oil pipe 220, thereby realizing the control of the closed pump 100.

[0039] Parking control valve 300 is used to control the braking of the travel wheels, see reference. Figure 3As shown, the parking control valve 300 includes a first position and a second position. When the parking control valve 300 is in the first position, the travel wheels are braked; when the parking control valve 300 is in the second position, the travel wheel brakes are released. That is, even if the closed-circuit pump 100 supplies hydraulic oil to the travel wheels to drive them, the travel wheels can only move forward or backward after the brakes are released and the parking control valve 300 is in the second position. If the parking control valve 300 is in the first position, even if the closed-circuit pump 100 supplies hydraulic oil to the travel wheels, the travel wheels cannot move. Currently, the parking control valve 300 is usually an electronically controlled valve. When the vehicle frequently starts and stops on a slope, it is necessary to frequently control the vehicle to park, frequently sending parking signals to the parking control valve 300, resulting in poor maneuverability. If the vehicle is not parked, it will experience slight rolling, affecting vehicle safety. To solve the above-mentioned technical problems, the hydraulic automatic parking control system of this embodiment is provided with a shuttle valve 400. The shuttle valve 400 includes a first oil inlet, a second oil inlet, and an oil outlet. The first oil inlet is connected to the first control oil pipe 210, the second oil inlet is connected to the second control oil pipe 220, and the oil outlet is connected to the parking control valve 300. When the hydraulic oil in the first control oil pipe 210 or the second control oil pipe 220 enters the oil outlet pipe 430 through the shuttle valve 400, it can drive the parking control valve 300 to switch from the first position to the second position. The parking control valve 300 is provided with a reset structure 310, which is used to drive the parking control valve 300 to move from the second position to the first position and maintain it in the first position. By connecting the first control oil pipe 210 and the second control oil pipe 220, which are connected to the replenishing oil pump 200, to the parking control valve 300 through the shuttle valve 400, the parking control valve 300 can release the vehicle brake when the hydraulic oil from the first control oil pipe 210 or the second control oil pipe 220 enters the outlet pipe 430 through the shuttle valve 400; when no hydraulic oil enters the parking control valve 300, the parking control valve 300 can be reset in time and brake the vehicle without manual operation. This ensures the vehicle's handling and safety even when the vehicle frequently starts and stops on slopes.

[0040] Reference Figure 1As shown, the hydraulic automatic parking control system of this embodiment also includes a control plunger 500. The first control oil pipe 210 and the second control oil pipe 220 are both connected to the control plunger 500. The control plunger 500 is used to adjust the oil supply quantity and oil supply direction of the closed pump 100. Specifically, when the oil pressure of the first control oil pipe 210 is equal to the oil pressure of the second control oil pipe 220, for example, when both the first forward / reverse proportional valve 211 and the second forward / reverse proportional valve 221 are in the closed state, the control plunger 500 drives the closed pump 100 to stop supplying oil to the driving wheels, and the vehicle stops. When the oil pressure of the first control oil pipe 210 is not equal to the oil pressure of the second control oil pipe 220, for example, when only one of the first forward / reverse proportional valve 211 and the second forward / reverse proportional valve 221 is in the closed state, the control plunger 500 drives the closed pump 100 to supply oil to the driving wheels, thereby driving the driving wheels to move and the vehicle moves.

[0041] Reference Figure 1 , Figure 2 As shown, the control plunger 500 has a first control position, a second control position, and a third control position. The second control position is located between the first and third control positions. The oil pressure in the first control oil pipe 210 is equal to the oil pressure in the second control oil pipe 220. For example, when both the first forward / reverse proportional valve 211 and the second forward / reverse proportional valve 221 are closed, the control plunger 500 is in the second control position. At this time, the closed-loop pump 100 stops supplying oil to the traveling wheels, and the vehicle stops. The oil pressure in the first control oil pipe 210 is greater than the oil pressure in the second control oil pipe 220. For example, when the first forward / reverse proportional valve 211 is open... When the second forward / reverse proportional valve 221 is closed, the control plunger 500 moves from the second control position to the third control position. At this time, the closed-loop pump 100 supplies oil to the traveling wheels, thereby driving the traveling wheels to move and the vehicle to move. If the oil pressure in the second control oil pipe 220 is greater than the oil pressure in the first control oil pipe 210, for example, when the second forward / reverse proportional valve 221 is open and the first forward / reverse proportional valve 211 is closed, the control plunger 500 moves from the second control position to the first control position. At this time, the closed-loop pump 100 supplies oil to the traveling wheels, thereby driving the traveling wheels to move and the vehicle to move. Further, it can be configured that when the control plunger 500 is in the first control position, the closed-loop pump 100 supplies oil to the traveling wheels to drive the vehicle forward; when the control plunger 500 is in the third control position, the closed-loop pump 100 supplies oil to the traveling wheels to drive the vehicle backward.

[0042] In the embodiments of this utility model, reference is made to Figure 1As shown, the closed-loop pump 100 supplies oil to the traveling wheels through the first oil passage 110 or the second oil passage 120. When the closed-loop pump 100 supplies oil to the traveling wheels through the first oil passage 110, it drives the vehicle forward; when the closed-loop pump 100 supplies oil to the traveling wheels through the second oil passage 120, it drives the vehicle backward. Both the first oil passage 110 and the second oil passage 120 are equipped with relief valves 130, which are used to limit the maximum pressure of the first oil passage 110 and the second oil passage 120.

[0043] In the embodiments of this utility model, reference is made to Figure 2 As shown, the first oil inlet of the shuttle valve 400 is connected to the first control oil pipe 210 through the first oil inlet pipe 410, the second oil inlet is connected to the second control oil pipe 220 through the second oil inlet pipe 420, and the oil outlet is connected to the parking control valve 300 through the oil outlet pipe 430. The shuttle valve 400 can be a suitable device purchased according to actual conditions, and is not limited in this embodiment.

[0044] In an embodiment of this utility model, the outlet end of the replenishing pump 200 is connected to the third oil circuit 230, and the first oil inlet pipe 410 and the second oil inlet pipe 420 are both connected to the third oil circuit 230; the third oil circuit 230 is equipped with a filter 240.

[0045] The vehicle of the second aspect embodiment of this utility model adopts the above-described hydraulic automatic parking control system, and therefore has at least all the beneficial effects of the hydraulic automatic parking control system, which will not be elaborated here.

[0046] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0047] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A hydraulic automatic parking control system, characterized by, The hydraulic automatic parking control system comprises: a closed pump for supplying oil to the traveling wheels of a vehicle; a replenishing pump, the outlet of which is connected with a first control oil pipe and a second control oil pipe, the replenishing pump adjusting the oil supply amount and direction of the closed pump by supplying oil to the first control oil pipe or the second control oil pipe; a parking control valve for controlling the braking of the traveling wheels, the parking control valve comprising a first position and a second position, the traveling wheels being braked when the parking control valve is in the first position, and the braking of the traveling wheels being cancelled when the parking control valve is in the second position; a shuttle valve comprising a first oil inlet, a second oil inlet and an oil outlet, the first oil inlet being in communication with the first control oil pipe, the second oil inlet being in communication with the second control oil pipe, and the oil outlet being connected with the parking control valve; the hydraulic oil in the first control oil pipe or the second control oil pipe enters the parking control valve through the shuttle valve, driving the parking control valve to switch from the first position to the second position, the parking control valve being provided with a reset structure for driving the parking control valve to move from the second position to the first position and to be kept in the first position.

2. The hydraulic automatic park control system of claim 1, wherein: The hydraulic automatic parking control system further comprises a control plunger, the first control oil pipe and the second control oil pipe being connected with the control plunger, the control plunger being used for adjusting the oil supply amount and direction of the closed pump; when the oil pressure of the first control oil pipe is equal to that of the second control oil pipe, the control plunger drives the closed pump to stop supplying oil to the traveling wheels, and the vehicle stops; when the oil pressure of the first control oil pipe is not equal to that of the second control oil pipe, the control plunger drives the closed pump to supply oil to the traveling wheels, thereby driving the traveling wheels to move, and the vehicle moves.

3. The hydraulic automatic park control system of claim 2, wherein: The control plunger has a first control position, a second control position and a third control position, the closed pump supplying oil to the traveling wheels to drive the vehicle to move forward when the control plunger is in the first control position, and the closed pump supplying oil to the traveling wheels to drive the vehicle to move backward when the control plunger is in the third control position; the closed pump stops supplying oil to the traveling wheels when the control plunger is in the second control position.

4. The hydraulic automatic park control system of claim 3, wherein: The second control position is located between the first control position and the third control position, the control plunger being in the second control position when the oil pressure of the first control oil pipe is equal to that of the second control oil pipe, the control plunger moving from the second control position to the third control position when the oil pressure of the first control oil pipe is greater than that of the second control oil pipe, and the control plunger moving from the second control position to the first control position when the oil pressure of the second control oil pipe is greater than that of the first control oil pipe.

5. The hydraulic automatic park control system of claim 1, wherein: The closed pump supplies oil to the traveling wheels through a first oil path or a second oil path, the closed pump supplying oil to the traveling wheels through the first oil path to drive the vehicle to move forward, and the closed pump supplying oil to the traveling wheels through the second oil path to drive the vehicle to move backward.

6. The hydraulic automatic park control system of claim 5, wherein: The first oil path and the second oil path are each provided with an overflow valve for limiting the maximum pressure of the first oil path and the second oil path.

7. The hydraulic automatic park control system of claim 1, wherein: The first oil inlet is connected to the first control oil pipe through a first oil inlet pipe, the second oil inlet is connected to the second control oil pipe through a second oil inlet pipe, and the oil outlet is connected to the parking control valve through an oil outlet pipe.

8. The hydraulic automatic park control system of claim 7, wherein: The outlet end of the oil supplement pump is connected to a third oil path, the first oil inlet pipe and the second oil inlet pipe are in communication with the third oil path, and the third oil path is provided with a filter.

9. The hydraulic automatic park control system of claim 1, wherein: The first control oil pipe is provided with a first forward / reverse proportional valve, and the second control oil pipe is provided with a second forward / reverse proportional valve.

10. A vehicle characterized by: The hydraulic automatic parking control system of any one of claims 1 to 9 is adopted.

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