Hydraulic unit for active suspension system

Abstract

The hydraulic unit for the active suspension system comprises a hydraulic pump assembly and a control assembly, the hydraulic pump assembly comprises a pump cover, a plunger cylinder body, a plunger, a thrust bearing and a pump body, a pump cavity is formed in the pump body, and the plunger cylinder body, the plunger and the thrust bearing are all arranged in the pump cavity. One end of the plunger is connected with one end of the plunger cylinder body through the plunger spring, and the other end of the plunger is provided with a spherical structure which is in contact with the thrust bearing and operates in cooperation with the thrust bearing; a bearing installation cavity used for positioning and installing the thrust bearing is formed in the pump body, the central axis of the bearing installation cavity is inclined relative to the horizontal axis, and the thrust bearing is arranged on the driving shaft in a sleeving mode and installed in the bearing installation cavity. According to the hydraulic unit for the active suspension system, the structure of the hydraulic unit is greatly simplified, the machining difficulty and cost are reduced, friction and abrasion between parts are reduced, and the durability and stability of the system are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile suspension systems, in particular to a hydraulic unit for an active suspension system. Background Art

[0002] Traditional swash plate piston pumps typically rely on complex hydraulic units to provide the required adjustment force. These units often contain multiple precision components, such as the slipper, swash plate, and return plate. These components are not only difficult and costly to manufacture, but also prone to wear over time, impacting system stability and durability. Therefore, simplifying the hydraulic unit's structure and reducing costs while maintaining high performance and durability have become pressing challenges in active suspension system technology. Utility Model Content

[0003] In view of the above-mentioned deficiencies of the current hydraulic unit of the suspension system, the utility model provides a hydraulic unit for an active suspension system with a simplified structure, low cost and good durability.

[0004] The embodiments of the present invention adopt the following technical solutions:

[0005] A hydraulic unit for an active suspension system, comprising a hydraulic pump assembly and a control assembly, wherein the control assembly comprises a controller and a synchronous motor, the synchronous motor being electrically connected to the controller, and the controller being used to receive and process control signals; the hydraulic pump assembly comprises a pump cover, a plunger cylinder, a plunger, a thrust bearing and a pump body, the pump cover and the pump body being fixedly connected by fasteners, a pump chamber being formed within the pump body, the plunger cylinder, the plunger and the thrust bearing being all arranged within the pump chamber, the plunger being arranged within the plunger cylinder, one end of the plunger being connected to one end of the plunger cylinder via a plunger spring, and the other end being provided with a spherical structure, the spherical structure being in contact with and cooperating with the thrust bearing; a bearing mounting chamber for positioning and mounting the thrust bearing is provided within the pump body, the central axis of the bearing mounting chamber being inclined relative to the horizontal axis, the thrust bearing being sleeved on the active shaft and mounted within the bearing mounting chamber.

[0006] In one embodiment, a driving shaft is provided between the hydraulic pump assembly and the control assembly, one end of the driving shaft is connected to the output end of the synchronous motor, and the other end drives the plunger cylinder to rotate.

[0007] In one embodiment, the synchronous motor is a permanent magnet synchronous motor or a brushless DC motor.

[0008] In one embodiment, it further comprises an axis spring and an axis retaining ring, wherein the axis spring and the axis retaining ring are sleeved on the driving shaft.

[0009] In one embodiment, a first needle roller bearing is provided between the driving shaft and the pump cover, and a second needle roller bearing is provided between the driving shaft and the plunger cylinder body. The driving shaft drives the plunger cylinder body to rotate through the second needle roller bearing.

[0010] In one embodiment, an oil inlet and an oil outlet are provided on both sides of the pump cover, and a flow channel for connecting the oil inlet and the oil outlet is formed between the pump body and the pump cover.

[0011] In one embodiment, the fastener is a fastening bolt.

[0012] The beneficial effect of the present invention is that it provides a hydraulic unit for an active suspension system, which adopts a method of direct contact and cooperation between the plunger spherical surface and the thrust bearing, eliminates the sliding shoe, swash plate, and return plate components, greatly simplifies the structure of the hydraulic unit, reduces processing difficulty and cost, reduces friction and wear between components, and improves the durability and stability of the system; this hydraulic unit is suitable for suspension systems with relatively small displacement and can be adjusted and optimized according to actual needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0014] Figure 1 This is a structural diagram of the hydraulic unit described in the utility model;

[0015] Figure 2 This is a cross-sectional view of the hydraulic unit described in the present utility model;

[0016] Figure 3 This is a schematic diagram of the appearance of the hydraulic unit described in the present utility model.

[0017] The accompanying drawings are marked as follows: 1. Controller; 2. Synchronous motor; 3. Oil inlet; 4. Oil outlet; 5. First needle roller bearing; 6. Pump cover; 7. Fastening bolt; 8. Shaft spring; 9. Shaft retaining ring; 10. Second needle roller bearing; 11. Driving shaft; 12. Plunger spring; 13. Plunger cylinder; 14. Plunger; 15. Thrust bearing; 16. Pump body. DETAILED DESCRIPTION

[0018] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the present invention.

[0019] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, features qualified as "first," "second," etc., may explicitly or implicitly include one or more of such features. In the description of this utility model, unless otherwise specified, "plurality" means two or more.

[0020] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed, removable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on specific circumstances.

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] like Figure 1 、 Figure 2 and Figure 3As shown, the utility model provides a hydraulic unit for an active suspension system, including a hydraulic pump assembly and a control assembly, wherein the control assembly includes a controller 1 and a synchronous motor 2, and the hydraulic pump assembly includes a pump cover 6, a plunger cylinder 13, a plunger 14, a thrust bearing 15 and a pump body 16. The controller 1 is used to receive and process signals from the vehicle system and send control instructions (input signals) to the synchronous motor 2; the synchronous motor 2 adopts a permanent magnet synchronous motor or a DC brushless motor, and the synchronous motor 2 rotates according to the instructions of the controller 1 and drives the active shaft 11 to rotate. In this embodiment, the controller 1 can also be an ECU, which is an electronic control unit of a car, also often referred to as a "driving computer" or "on-board computer". It is a highly integrated miniature computer management center.

[0023] The pump body 16 and the pump cover 6 are fixedly connected by fastening bolts 7. A pump cavity is formed in the pump body 16, and the plunger cylinder 13, the plunger 14, and the thrust bearing 15 are all arranged in the pump cavity. The plunger 14 is installed in the plunger cylinder 13, and the plunger cylinder 13 is installed in the pump body 16. The plunger 14 reciprocates in the plunger cylinder 13, and one end of the plunger 14 is connected to one end of the plunger cylinder 13 through the plunger spring 12, and the other end is provided with a spherical structure, which is in direct contact with the thrust bearing 15 and cooperates in operation. A bearing mounting cavity for positioning and mounting the thrust bearing 16 is provided in the pump body 16. The central axis of the bearing mounting cavity is inclined relative to the horizontal axis. The thrust bearing 15 is sleeved on the driving shaft 11 and installed in the bearing mounting cavity to support and drive the reciprocating motion of the plunger 14.

[0024] A driving shaft 11 is provided between the hydraulic pump assembly and the control assembly. This driving shaft 11 is connected to the output of the synchronous motor 2 and drives the plunger cylinder 13 to rotate. A shaft spring 8 and a shaft retaining ring 9 are sleeved on the driving shaft 11 to secure and support it, ensuring its stability during operation.

[0025] A first needle roller bearing 5 is provided between the driving shaft 11 and the pump cover 6, and a second needle roller bearing 10 is provided between the driving shaft 11 and the plunger cylinder 13. The driving shaft 11 drives the plunger cylinder 13 to rotate via the second needle roller bearing 10. In actual applications, the needle roller bearing can also be replaced by a bushing or a body cover made of similar bearing alloy to provide contact with the driving shaft.

[0026] An oil inlet 3 and an oil outlet 4 are provided on both sides of the pump cover 6 for inputting and outputting the hydraulic medium. A flow channel is formed between the pump body 16 and the pump cover 6 to connect the oil inlet 3 and the oil outlet 4.

[0027] When this device is operating, controller 1 sends control instructions to synchronous motor 2 based on the vehicle system's requirements. Synchronous motor 2 rotates, driving drive shaft 11. Drive shaft 11, via a needle bearing and plunger cylinder 13, drives plunger 14 to reciprocate within plunger cylinder 13. The spherical surface of plunger 14 directly contacts and cooperates with thrust bearing 15, drawing hydraulic medium from oil inlet 3 and pumping it out from oil outlet 4, providing high-pressure hydraulic pressure to the suspension system. The hydraulic pump utilizes a simple swash plate plunger 14 pump structure, eliminating complex components such as the slipper, swash plate, and return stroke. The plunger's spherical surface directly cooperates with thrust bearing 15, significantly simplifying the hydraulic unit's structure and reducing both manufacturing difficulty and cost.

[0028] The above embodiments are preferred implementation schemes of the present invention. In addition, the present invention can also be implemented in other ways. Any obvious replacement without departing from the concept of the present technical solution is within the scope of the present invention patent.

[0029] In order to make it easier for ordinary technicians in this field to understand the improvements of the present invention over the prior art, some drawings and descriptions of the present invention have been simplified, and for the sake of clarity, some other elements are omitted in this application document. Ordinary technicians in this field should realize that these omitted elements may also constitute the content of the present invention.

Claims

1. A hydraulic unit for an active suspension system, characterized in that: The invention comprises a hydraulic pump assembly and a control assembly, wherein the control assembly comprises a controller (1) and a synchronous motor (2), wherein the synchronous motor (2) is electrically connected to the controller (1), and the controller is used to receive and process control signals; the hydraulic pump assembly comprises a pump cover (6), a plunger cylinder (13), a plunger (14), a thrust bearing (15) and a pump body (16), wherein the pump cover (6) and the pump body (16) are fixedly connected by fasteners, a pump cavity is formed in the pump body (16), and the plunger cylinder (13), the plunger (14), the thrust bearing (15) and the pump body (16) are fixedly connected by fasteners. 5) are arranged in the pump cavity, the plunger (14) is arranged in the plunger cylinder (13), one end of the plunger (14) is connected to one end of the plunger cylinder (13) through the plunger spring (12), and the other end is provided with a spherical structure, and the spherical structure contacts and cooperates with the thrust bearing (15) to operate; a bearing mounting cavity for positioning and mounting the thrust bearing (15) is provided in the pump body (16), the central axis of the bearing mounting cavity is inclined relative to the horizontal axis, and the thrust bearing (15) is sleeved on the driving shaft (11) and installed in the bearing mounting cavity.

2. The hydraulic unit according to claim 1, characterized in that A driving shaft (11) is provided between the hydraulic pump assembly and the control assembly. One end of the driving shaft (11) is connected to the output end of the synchronous motor (2), and the other end drives the plunger cylinder (13) to rotate.

3. The hydraulic unit according to claim 1, characterized in that: The synchronous motor (2) is a permanent magnet synchronous motor or a brushless DC motor.

4. The hydraulic unit according to claim 1, characterized in that It also includes an axis spring (8) and an axis retaining ring (9), and the axis spring (8) and the axis retaining ring (9) are sleeved on the driving shaft (11).

5. The hydraulic unit according to claim 1, wherein: A first needle roller bearing (5) is provided between the driving shaft (11) and the pump cover (6), and a second needle roller bearing (10) is provided between the driving shaft (11) and the plunger cylinder (13). The driving shaft (11) drives the plunger cylinder (13) to rotate via the second needle roller bearing (10).

6. The hydraulic unit according to claim 1, characterized in that An oil inlet (3) and an oil outlet (4) are provided on both sides of the pump cover (6), and a flow channel for connecting the oil inlet (3) and the oil outlet (4) is formed between the pump body (16) and the pump cover (6).

7. The hydraulic unit according to claim 1, characterized in that: The fastener is a fastening bolt (7).

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