Gear pump assembly and active suspension system

Abstract

The utility model belongs to the technical field of suspensions, and particularly relates to a gear pump assembly and an active suspension system, which comprise a gear pump and an energy accumulator, an oil outlet of the gear pump is connected with an oil outlet pipe, and the energy accumulator is mounted on a shell of the gear pump. The side, provided with the oil outlet pipe, of the shell of the gear pump is provided with an energy storage device mounting position, or the side, close to the oil outlet pipe, of the shell of the gear pump is provided with an energy storage device mounting position; the oil outlet pipe is connected with the energy storage device through the control valve group; when the gear pump works normally, part of oil enters the energy storage device from an oil outlet of the gear pump through the oil outlet pipe and the control valve set. When the gear pump breaks down, oil in the energy storage device flows to the tail end of the oil outlet pipe through the control valve set. The utility model has the advantages of compact structure and reasonable arrangement in limited chassis space.

Description

Technical Field

[0001] The utility model belongs to the technical field of suspensions, and particularly relates to a gear pump assembly and an active suspension system. Background Art

[0002] The suspension system is an important part of the chassis. Its functions mainly include transmitting the forces and torques acting between the wheels and the frame, buffering the impact caused by the uneven road surface on the frame or the body, and reducing the vibration caused by the impact of the uneven road surface, so as to ensure that the vehicle can drive smoothly.

[0003] Among them, the active suspension system has the advantage of being able to quickly adjust the vehicle body height, which can greatly improve the driving and riding experience of users. However, in the existing active suspension systems, their structural compositions are relatively complex. Especially, the gear pump and the energy accumulator occupy a large amount of chassis space, thus affecting the layout of the entire suspension system.

[0004] Based on the above practical difficulties, how to improve the active suspension system, especially its gear pump and energy accumulator parts, has become an urgent problem to be solved. Summary of the Utility Model

[0005] A gear pump assembly and an active suspension system provided by the utility model have a compact structure and can be reasonably arranged in a limited chassis space.

[0006] The technical solution of the utility model includes: a gear pump assembly, including a gear pump, an oil outlet pipe is connected to the oil outlet of the gear pump, and further includes: an energy accumulator, the energy accumulator is installed on the housing of the gear pump, and an energy accumulator installation position is provided on one side of the housing of the gear pump where the oil outlet pipe is arranged, or an energy accumulator installation position is provided on one side of the housing of the gear pump close to the oil outlet pipe; a control valve group, the oil outlet pipe is connected to the energy accumulator through the control valve group; when the gear pump is working normally, part of the oil liquid enters the energy accumulator from the oil outlet of the gear pump through the oil outlet pipe and the control valve group; when a fault occurs in the gear pump, the oil liquid in the energy accumulator flows to the end of the oil outlet pipe through the control valve group.

[0007] Preferably, a welding fixing part is provided on one side of the housing of the energy accumulator connected to the housing of the gear pump; or, a fastener is provided on one side of the housing of the energy accumulator connected to the housing of the gear pump.

[0008] Preferably, the number of the energy accumulators is two, the two energy accumulators are arranged on the same side of the housing of the gear pump, and the two energy accumulators are arranged vertically.

[0009] Preferably, the control valve group includes an electromagnetic three-way valve. The first interface and the second interface of the electromagnetic three-way valve are connected to the oil outlet pipe, and the third interface of the electromagnetic three-way valve is connected to the energy accumulator.

[0010] Preferably, the control valve group includes an electromagnetic valve. The first interface of the electromagnetic valve is connected to the oil outlet pipe through a pipeline, and the second interface of the electromagnetic valve is connected to the energy accumulator through a pipeline.

[0011] Preferably, the oil outlet pipe is arranged on the front side of the housing of the gear pump, and the energy accumulator is installed on the upper side of the housing of the gear pump.

[0012] Preferably, an energy storage oil pipe is provided between the oil outlet pipe and the energy accumulator. The energy storage oil pipe is provided with a one-way valve, and the one-way valve conducts in the direction from the energy accumulator to the oil outlet pipe.

[0013] Preferably, the control valve group includes a first electromagnetic two-way valve, a second electromagnetic two-way valve, a three-way joint and a one-way valve; the first electromagnetic two-way valve is arranged near the oil outlet of the oil outlet pipe; the first interface and the second interface of the three-way joint are connected to the oil outlet pipe, and the third interface of the three-way joint is connected to the energy accumulator through a first pipeline; the second electromagnetic two-way valve is arranged on the first pipeline; the one-way valve is arranged on the energy storage oil pipe, the energy storage oil pipe is connected in parallel with the first pipeline, and the end of the energy storage oil pipe is connected to the oil outlet pipe.

[0014] The present utility model further provides an active suspension assembly, which includes the above-mentioned gear pump assembly, and a shock absorber is connected to the end of the oil outlet pipe of the gear pump assembly.

[0015] The beneficial effects of the present utility model are as follows: by installing the energy accumulator on the housing of the gear pump, especially by arranging the energy accumulator and the oil outlet pipe on the same side, or by arranging the energy accumulator on the side close to the oil outlet pipe, the gear pump and the energy accumulator are integrated into one body, and the close arrangement of the two is beneficial to the arrangement of the pipeline and the control valve group, thereby forming a gear pump assembly with a relatively concentrated occupied volume, which is beneficial to the layout in the limited vehicle chassis space, can save space, improve the integration degree of the entire suspension system, and provide great convenience for the layout of the entire suspension system. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0017] Figure 1It is a schematic diagram of the gear pump assembly from two perspectives in Embodiment 1;

[0018] Figure 2 It is a schematic diagram of the gear pump assembly from two perspectives in Embodiment 2;

[0019] Figure 3 It is a schematic diagram of the gear pump assembly in Embodiment 3.

[0020] Wherein:

[0021] 1. Gear pump, 11. Oil outlet pipe, 2. Energy storage device, 21. Welding fixing part, 3. Electromagnetic three-way valve, 4. Three-way joint, 51. First electromagnetic two-way valve, 52. Second electromagnetic two-way valve, 6. Energy storage oil pipe, 61. Check valve, 7. Solenoid valve. Detailed implementation manners

[0022] In order to enable those skilled in the art to better understand the solution of the present utility model, the present utility model will be further described in detail below in conjunction with the accompanying drawings and specific implementation manners.

[0023] In this article, terms such as "upper, lower, left, right, inner, outer" are established based on the positional relationship shown in the drawings. Depending on the different drawings, the corresponding positional relationship may also change accordingly. Therefore, it cannot be understood as an absolute limitation of the protection scope; moreover, relational terms such as "first" and "second" are only used to distinguish one component with the same name from another, and do not necessarily require or imply any such actual relationship or order between these components. In addition, in the embodiments of the present utility model, "above", "below", etc. include the present number.

[0024] The gear pump assembly and the active suspension system in this embodiment are to solve the problem of how to better utilize the space under the premise of limited space in the vehicle chassis and arrange the components of the suspension system. Especially for the gear pump and the energy storage device, the two are integrated into one to form a gear pump assembly, so as to save space, improve the integration degree, and facilitate the arrangement of the entire active suspension system.

[0025] As Figures 1 to 3 shown, the gear pump assembly in this embodiment includes a gear pump 1. The oil outlet of the gear pump 1 is connected to an oil outlet pipe 11. When the gear pump 1 is working normally, the oil, such as high-pressure oil, flows from the oil outlet to the oil outlet pipe 11 under the power of the gear pump 1, and then flows to the components that need to be controlled through the oil outlet pipe 11.

[0026] The gear pump assembly of this embodiment further includes an accumulator 2, which is installed on the housing of the gear pump 1. Specifically, an accumulator installation position is provided on the side of the housing of the gear pump 1 where the oil outlet pipe 11 is arranged, or an accumulator installation position is provided on the side of the housing of the gear pump 1 close to the oil outlet pipe 11. That is to say, the accumulator 2 and the oil outlet pipe 11 are arranged on the same side of the housing of the gear pump 1, or the two are arranged on two sides of the housing of the gear pump 1 close to each other. For example, in Figure 1 , Figure 2 the given example, the accumulator 2 and the oil outlet pipe 11 are arranged on the same side of the housing of the gear pump 1; in Figure 3 the given example, the accumulator 2 and the oil outlet pipe 11 are arranged on two sides of the housing of the gear pump 1 close to each other.

[0027] The gear pump assembly of this embodiment further includes a control valve group, and the oil outlet pipe 11 is connected to the accumulator 2 through this control valve group. When the gear pump 1 is working normally, part of the oil fluid enters the accumulator 2 from the oil outlet of the gear pump 1 through the oil outlet pipe 11 and the control valve group. Of course, most of the oil fluid provided by the gear pump 1 flows to the end of the oil outlet pipe 11 to be supplied to the required components for corresponding actions; when the gear pump 1 fails, the oil fluid in the accumulator 2 flows through the control valve group to the end of the oil outlet pipe 11, so as to ensure that after the gear pump 1 fails, for example, in case of emergencies such as failure or power outage, the accumulator 2 can be used as an emergency power source to ensure that the actuator can continue to complete the necessary actions, and the entire gear pump assembly can still maintain normal operation, improving the safety and reliability of the system.

[0028] In this embodiment, by installing the accumulator 2 on the housing of the gear pump 1, especially by arranging the accumulator 2 and the oil outlet pipe 11 on the same side, or arranging the accumulator 2 on the side close to the oil outlet pipe 11, the gear pump 1 and the accumulator 2 are integrated into one body, and the close arrangement of the two is conducive to the arrangement of pipelines and the control valve group, thereby forming a gear pump assembly with a relatively concentrated occupied volume, which is conducive to layout in the limited space of the vehicle chassis, can save space, improve the integration degree of the entire suspension system, and provide great convenience for the layout of the entire suspension system.

[0029] Specifically, a welding fixing part 21 is provided on the side where the housing of the accumulator 2 is connected to the housing of the gear pump 1, so as to integrate the accumulator 2 and the gear pump 1 into a gear pump assembly by welding, so as to improve the reliability of the entire gear pump assembly, and even when subjected to a large external force, the entire gear pump assembly can still maintain reliable operation. Or, fasteners are provided on the side where the housing of the accumulator 2 is connected to the housing of the gear pump 1, for example, the two are connected by means of bolts, screws, pins, etc., which is convenient for later replacement and maintenance.

[0030] Specifically, there are two energy accumulators 2, which are arranged on the same side of the housing of the gear pump 1 and arranged up and down. In this way, two energy accumulators 2 are designed in one gear pump assembly to store more spare oil and extend the working time after the gear pump 1 fails.

[0031] like Figure 1 As shown, in the first implementation of the present embodiment, the control valve group includes an electromagnetic three-way valve 3, the first interface and the second interface of the electromagnetic three-way valve 3 are connected to the oil outlet pipe 11, and the third interface of the electromagnetic three-way valve 3 is connected to the energy accumulator 2. In normal operation, the electromagnetic three-way valve 3 remains normally open, that is, when the high-pressure oil pumped from the gear pump 1 passes through the electromagnetic three-way valve 3 from the oil outlet pipe 11, most of the oil enters the second interface from the first interface of the electromagnetic three-way valve 3 and flows to the end of the oil outlet pipe 11, and is provided to the action parts of the suspension system; part of the oil flows from the third interface of the electromagnetic three-way valve 3 to the energy accumulator 2 for storage, and as shown in FIG. Figure 1 As shown, the accumulator 2 is directly connected to the third interface of the electromagnetic three-way valve 3 to save the space occupied by the pipeline, making the volume of the entire gear pump assembly more compact. Once the gear pump 1 fails, the first interface of the electromagnetic three-way valve 3 is closed, that is, the passage of the oil outlet of the gear pump 1 is closed, and the oil stored in the accumulator 2 flows to the second interface through the third interface of the electromagnetic three-way valve 3, and then flows to the end of the oil outlet pipe 11, providing high-pressure oil to the action parts of the suspension system to maintain the normal operation of the entire suspension system.

[0032] like Figure 3 As shown, in another implementation of this embodiment, the control valve group includes a solenoid valve 7, a first interface of the solenoid valve 7 is connected to an oil outlet pipe 11 through a pipeline, and a second interface of the solenoid valve 7 is connected to an accumulator 2 through a pipeline. Specifically, the oil outlet pipe 11 is provided on the front side of the housing of the gear pump 1, and the accumulator 2 is installed on the upper side of the housing of the gear pump 1.

[0033] like Figure 2 As shown, in another implementation of the present embodiment, an energy storage oil pipe 6 is provided between the oil outlet pipe 11 and the energy accumulator 2, and the energy storage oil pipe 6 is provided with a one-way valve 61, and the one-way valve 61 is conducted from the energy accumulator 2 to the oil outlet pipe 11. Therefore, by designing an additional energy storage oil pipe 6 to separate the oil inlet and outlet pipes of the energy accumulator 2, the reliable oil supply of the energy accumulator 2 can be improved when the gear pump 1 fails, thereby improving the working reliability of the entire gear pump assembly when the gear pump 1 fails.

[0034] Specifically, the control valve group includes a first electromagnetic two-way valve 51, a second electromagnetic two-way valve 52, a three-way joint 4, and a check valve 61. The first electromagnetic two-way valve 51 is arranged near the oil outlet of the oil outlet pipe 11. Under normal conditions, the first electromagnetic two-way valve 51 remains open. Once the gear pump 1 fails, the first electromagnetic two-way valve 51 is kept closed. The first interface and the second interface of the three-way joint 4 are connected to the oil outlet pipe 11, and the third interface of the three-way joint 4 is connected to the energy accumulator 2 through a first pipeline. The second electromagnetic two-way valve 52 is arranged in the first pipeline. Similar to the first electromagnetic two-way valve 51, the second electromagnetic two-way valve 52 remains open under normal conditions, so that the oil pumped out by the gear pump 1 can enter the energy accumulator 2 through the second electromagnetic two-way valve 52. Once the gear pump 1 fails, the second electromagnetic two-way valve 52 is kept closed. The check valve 61 is arranged in the energy storage oil pipe 6. The energy storage oil pipe 6 is connected in parallel with the first pipeline, and the end of the energy storage oil pipe 6 is connected to the oil outlet pipe 11. By using the check valve 61, under normal conditions, the oil pumped out by the gear pump 1 will not enter the energy accumulator 2 through the energy storage oil pipe 6. Once the gear pump 1 fails, the oil in the energy accumulator 2 can enter the oil outlet pipe 11 through the check valve 61 from the energy storage oil pipe 6 and be provided to the moving parts required by the suspension system to keep the entire suspension system working properly.

[0035] In another embodiment, an active suspension assembly (not shown in the figure) is further provided, including the above-mentioned gear pump assembly. The end of the oil outlet pipe 11 of the gear pump assembly is connected with a shock absorber. In the active suspension assembly of this embodiment, because a gear pump assembly integrating the gear pump 1 and the energy accumulator 2 is adopted, by installing the energy accumulator 2 on the housing of the gear pump 1, especially by arranging the energy accumulator 2 and the oil outlet pipe 11 on the same side, or arranging the energy accumulator 2 on one side close to the oil outlet pipe 11, the gear pump 1 and the energy accumulator 2 are integrated into one body, and the close arrangement of the two is beneficial to the arrangement of the pipeline and the control valve group, thus forming a gear pump assembly with a relatively concentrated occupied volume, which is beneficial to the layout in the limited vehicle chassis space, can save space, improve the integration degree of the entire suspension system, and provide great convenience for the layout of the entire suspension system.

[0036] In the case where the embodiments do not conflict with each other, at least part of the technical solutions in each embodiment can be recombined to form the essential technical solutions of the present invention. Of course, each embodiment can also be mutually cited or included. And it should be noted that the adaptive adjustment and modification made by those skilled in the art when recombining the technical means recorded in each embodiment will also fall within the protection scope of the present invention.

[0037] The technical principle of the present utility model has been described in conjunction with specific embodiments. However, it should be noted that the above descriptions are only for explaining the principle of the present utility model and cannot be construed as specific limitations on the protection scope of the present utility model in any way. Based on this explanation, those skilled in the art can think of other specific embodiments or equivalent substitutions of the present utility model without creative efforts, and all will fall within the protection scope of the present utility model.

Claims

1. A gear pump assembly, comprising a gear pump (1), wherein an oil outlet of the gear pump (1) is connected to an oil outlet pipe (11), characterized in that: Also includes: An energy accumulator (2), the energy accumulator (2) being mounted on the housing of the gear pump (1), and an energy accumulator mounting position is provided on a side of the housing of the gear pump (1) where the oil outlet pipe (11) is arranged, or an energy accumulator mounting position is provided on a side of the housing of the gear pump (1) close to the oil outlet pipe (11); A control valve group, wherein the oil outlet pipe (11) is connected to the energy accumulator (2) via the control valve group; When the gear pump (1) operates normally, part of the oil flows from the oil outlet of the gear pump (1) through the oil outlet pipe (11) and the control valve group into the energy accumulator (2); when the gear pump (1) fails, the oil in the energy accumulator (2) flows to the end of the oil outlet pipe (11) through the control valve group.

2. A gear pump assembly according to claim 1, characterized in that: A welding fixing portion (21) is provided on one side where the housing of the energy accumulator (2) is connected to the housing of the gear pump (1); Alternatively, a fastener is provided on one side where the housing of the energy accumulator (2) is connected to the housing of the gear pump (1).

3. A gear pump assembly according to claim 1, characterized in that: The number of the energy accumulators (2) is two, the two energy accumulators (2) are arranged on the same side of the housing of the gear pump (1), and the two energy accumulators (2) are arranged up and down.

4. A gear pump assembly according to any one of claims 1 to 3, characterized in that: The control valve group comprises an electromagnetic three-way valve (3), a first interface and a second interface of the electromagnetic three-way valve (3) being connected to the oil outlet pipe (11), and a third interface of the electromagnetic three-way valve (3) being connected to the energy accumulator (2).

5. A gear pump assembly according to any one of claims 1 to 3, characterized in that: The control valve group comprises a solenoid valve (7), a first interface of the solenoid valve (7) being connected to the oil outlet pipe (11) via a pipeline, and a second interface of the solenoid valve (7) being connected to the energy accumulator (2) via a pipeline.

6. A gear pump assembly according to claim 5, characterized in that: The oil outlet pipe (11) is arranged on the front side of the housing of the gear pump (1), and the energy accumulator (2) is mounted on the upper side of the housing of the gear pump (1).

7. A gear pump assembly according to any one of claims 1 to 3, characterized in that: An energy storage oil pipe (6) is provided between the oil outlet pipe (11) and the energy accumulator (2), and the energy storage oil pipe (6) is provided with a one-way valve (61), and the one-way valve (61) is connected in a direction from the energy accumulator (2) to the oil outlet pipe (11).

8. A gear pump assembly according to claim 7, characterized in that: The control valve group comprises a first electromagnetic two-way valve (51), a second electromagnetic two-way valve (52), a three-way connector (4) and a one-way valve (61); The first electromagnetic two-way valve (51) is arranged on the oil outlet pipe (11) near the oil outlet; The first interface and the second interface of the three-way joint (4) are connected to the oil outlet pipe (11), and the third interface of the three-way joint (4) is connected to the energy accumulator (2) via a first pipeline; The second electromagnetic two-way valve (52) is arranged in the first pipeline; The one-way valve (61) is arranged on the energy storage oil pipe (6), the energy storage oil pipe (6) is connected in parallel with the first pipeline, and the end of the energy storage oil pipe (6) is connected to the oil outlet pipe (11).

9. An active suspension system, characterized in that: It comprises a gear pump assembly as claimed in any one of claims 1 to 8, wherein a shock absorber is connected to the end of an oil outlet pipe (11) of the gear pump assembly.

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