Active hydraulic preload adjusting type shock absorber

Abstract

The utility model discloses an active hydraulic preload adjusting type shock absorber, which belongs to the technical field of shock absorbers and comprises a fixed frame and a lower pressing plate, a hydraulic cylinder is fixedly mounted in the fixed frame, an electronic control unit is fixedly mounted on one side of the fixed frame, and an upper pressing plate is fixedly mounted at the output end of the hydraulic cylinder. Two inserting rods and a sliding barrel are fixedly installed at the bottom end of the upper pressing plate, a round barrel is fixedly installed at the top end of the lower pressing plate, the inserting rods are installed in the round barrel in a sliding mode, a large damper and a first spring are fixedly installed at the bottom ends of the inserting rods, and the bottom ends of the large damper and the first spring are both fixedly installed at the top end of the lower pressing plate. A liquid storage cylinder is fixedly installed at the top end of the lower support, and the sliding barrel is slidably installed in the liquid storage cylinder. The damping force can be adjusted in real time according to different road conditions and driving conditions, the best controllability and comfort are provided, the control stability of a vehicle is improved, vibration and noise of a vehicle body are effectively reduced, and the riding comfort is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of shock absorbers, in particular to an active hydraulic preload regulating shock absorber. Background Art

[0002] Active hydraulic preload adjustable shock absorber is an advanced vibration reduction technology, which directly applies control force to the wheel or body through a motor or hydraulic pump to adapt to different road conditions and driving needs. The background technology of this shock absorber mainly includes the following aspects: Active shock absorber is widely used in various fields due to its superior performance, such as integrated circuit manufacturing, precision measurement, precision machining, medical equipment and aerospace and other high-end fields; Compared with traditional passive shock absorbers, active shock absorbers can adjust the damping force in real time to adapt to different road conditions and load conditions. This adjustment is achieved by changing the shock absorber valve system parameters or oil properties. The background technology of active hydraulic preload adjustable shock absorber involves multiple fields of application, damping adjustability, technology development, patent application and model application. The development and application of these technologies have given active shock absorbers significant advantages in providing comfort and handling.

[0003] The damping coefficient of traditional passive shock absorbers is fixed and cannot be adjusted in real time according to different road conditions. It cannot respond quickly to sudden changes in the road surface and cannot provide better vibration reduction. Therefore, it cannot achieve the best results in vehicle handling stability and ride comfort at the same time. Therefore, we propose an active hydraulic preload adjustable shock absorber to solve this problem. Utility Model Content

[0004] The purpose of the utility model is to provide an active hydraulic preload adjustable shock absorber to solve the problems raised in the above background technology.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] An active hydraulic preload adjustment shock absorber comprises: a fixed frame and a lower pressure plate, a hydraulic cylinder is fixedly installed in the fixed frame, an electronic control unit is fixedly installed on one side of the fixed frame, an upper pressure plate is fixedly installed on the output end of the hydraulic cylinder, two plug-in rods and a sliding cylinder are fixedly installed on the bottom end of the upper pressure plate, a circular cylinder is fixedly installed on the top end of the lower pressure plate, the plug-in rod is slidably installed in the circular cylinder, a large damper and a first spring are fixedly installed on the bottom end of the plug-in rod, the bottom ends of the large damper and the first spring are both fixedly installed on the top end of the lower pressure plate, a lower support is fixedly installed on the lower pressure plate, a liquid storage cylinder is fixedly installed on the top end of the lower support, the sliding cylinder is slidably installed in the liquid storage cylinder, a second vibration damping assembly is arranged in the sliding cylinder, and a hydraulic vibration damping assembly is arranged in the liquid storage cylinder.

[0007] Preferably, the second shock absorbing assembly includes: a piston tube and a third spring, the third spring is fixedly installed in the outer shell, the bottom end of the third spring is fixedly connected to the piston tube, a small damper is fixedly installed in the outer shell, the bottom end of the small damper is fixedly connected to the piston tube, and a connecting rod is fixedly installed at the bottom end of the piston tube.

[0008] Preferably, the hydraulic shock absorber assembly includes: a piston block and a pressure cylinder, the piston block is fixedly mounted on the bottom end of the connecting rod, the pressure cylinder is fixedly mounted in the liquid storage cylinder, the piston block is slidably mounted in the pressure cylinder, a second spring is fixedly mounted on the top end of the pressure cylinder, and the second spring is fixedly mounted on the bottom end of the outer shell.

[0009] Preferably, the piston block is provided with a plurality of flow valves, the pressure cylinder is provided with a damping valve and a one-way valve, the pressure cylinder is provided with a pressure groove matching the piston block, and a liquid storage cavity is provided between the pressure cylinder and the liquid storage cylinder.

[0010] Preferably, a plug-in circular groove matching the plug-in rod is formed on the circular cylinder, the large damper and the first spring are both fixedly mounted in the plug-in circular groove, and the first spring is sleeved on the outside of the large damper.

[0011] Preferably, a bearing is fixedly installed in the outer shell, a movable hole matching the connecting rod is opened on the bearing, a sealing ring is sleeved on the outer side of the bearing, and the third spring is sleeved on the outer side of the small damper.

[0012] Preferably, the fixing frame is provided with a mounting hole matching the hydraulic cylinder, the outer shell is provided with a buffer pressure groove matching the piston tube, and the third spring and the small damper are fixedly installed in the buffer pressure groove.

[0013] In the utility model, the active hydraulic preload adjustment shock absorber receives data from the sensor through the electronic control unit, analyzes the current road conditions and driving style, and then automatically starts the hydraulic cylinder according to the preset algorithm, thereby driving the upper pressure plate to press down, and the upper pressure plate simultaneously drives the two plug-in rods and the sliding cylinder to press down together, and the plug-in rod drives the large damper and the first spring plus the small damper and the third spring to adjust the damping force of the shock absorber to adapt to different road conditions and driving requirements;

[0014] In the utility model, the active hydraulic preload adjustment shock absorber described above slides the piston block inside the pressure cylinder, and the piston block cooperates with the pressure hole opened on the pressure cylinder to squeeze the hydraulic oil, and then the second spring cooperates with the outer shell to provide buffering, and the third spring cooperates with the small damper to prevent the damper from rebounding too violently after the compression is completed, thereby damaging the mechanism, and can greatly reduce vibration and noise;

[0015] The utility model has a reasonable structural design. Through the cooperation of multiple structures, the damping force can be adjusted in real time according to different road conditions and driving conditions, providing optimal controllability and comfort, improving the vehicle's control stability, effectively reducing the vibration and noise of the vehicle body, and improving ride comfort. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a three-dimensional structural schematic diagram of an active hydraulic preload adjustment shock absorber proposed by the utility model;

[0017] Figure 2 This is a cross-sectional structural schematic diagram of an active hydraulic preload adjustment shock absorber proposed by the utility model;

[0018] Figure 3 It is a partial structural cross-sectional schematic diagram of an active hydraulic preload adjustment shock absorber proposed by the utility model;

[0019] Figure 4 The utility model is a schematic cross-sectional view of the local structure of an active hydraulic preload adjustment shock absorber.

[0020] In the figure: 1, fixed frame; 2, hydraulic cylinder; 3, electronic control unit; 4, upper pressure plate; 5, sliding cylinder; 6, liquid storage cylinder; 7, lower pressure plate; 8, plug-in rod; 9, circular cylinder; lower support 10, lower support; first spring 11, first spring; large damper 12, large damper; bearing 13, bearing; piston block 14, piston; connecting rod 15, connecting rod; outer shell 16, outer shell; second spring 17, second spring; pressure cylinder 18, pressure cylinder; piston tube 19, piston tube; sealing ring 20, sealing ring; third spring 21, third spring; small damper 22, small damper. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0022] Reference Figure 1-4, an active hydraulic preload adjustment shock absorber, comprising: a fixed frame 1 and a lower pressure plate 7, a hydraulic cylinder 2 is fixedly installed in the fixed frame 1, an electronic control unit 3 is fixedly installed on one side of the fixed frame 1, an upper pressure plate 4 is fixedly installed on the output end of the hydraulic cylinder 2, two plug-in rods 8 and a sliding cylinder 5 are fixedly installed on the bottom end of the upper pressure plate 4, a circular cylinder 9 is fixedly installed on the top of the lower pressure plate 7, the plug-in rod 8 is slidably installed in the circular cylinder 9, a large damper 12 and a first spring 11 are fixedly installed on the bottom end of the plug-in rod 8, the bottom ends of the large damper 12 and the first spring 11 are both fixedly installed on the top of the lower pressure plate 7, a lower support 10 is fixedly installed on the lower pressure plate 7, a liquid storage cylinder 6 is fixedly installed on the top of the lower support 10, the sliding cylinder 5 is slidably installed in the liquid storage cylinder 6, a second vibration reduction assembly is arranged in the sliding cylinder 5, and a hydraulic vibration reduction assembly is arranged in the liquid storage cylinder 6.

[0023] In this embodiment, the second shock absorbing assembly includes: a piston tube 19 and a third spring 21. The third spring 21 is fixedly installed in the outer shell 16. The bottom end of the third spring 21 is fixedly connected to the piston tube 19. A small damper 22 is fixedly installed in the outer shell 16. The bottom end of the small damper 22 is fixedly connected to the piston tube 19. A connecting rod 15 is fixedly installed at the bottom end of the piston tube 19 to further reduce vibration and improve comfort.

[0024] In this embodiment, the hydraulic shock absorbing assembly includes: a piston block 14 and a pressure cylinder 18. The piston block 14 is fixedly installed at the bottom end of the connecting rod 15, and the pressure cylinder 18 is fixedly installed in the liquid storage cylinder 6. The piston block 14 is slidably installed in the pressure cylinder 18. A second spring 17 is fixedly installed at the top of the pressure cylinder 18, and the second spring 17 is fixedly installed at the bottom end of the outer shell 16, which better improves stability.

[0025] In this embodiment, a plurality of flow valves are provided on the piston block 14, a damping valve and a one-way valve are provided on the pressure cylinder 18, a pressure groove matching the piston block 14 is provided on the pressure cylinder 18, a liquid storage chamber is provided between the pressure cylinder 18 and the liquid storage cylinder 6 for further vibration reduction, a plug-in circular groove matching the plug-in rod 8 is provided on the circular cylinder 9, the large damper 12 and the first spring 11 are fixedly installed in the plug-in circular groove, and the first spring 11 is sleeved on the outside of the large damper 12 to better prevent it from rebounding too violently.

[0026] In this embodiment, a bearing 13 is fixedly installed in the outer shell 16, and a movable hole matching the connecting rod 15 is opened on the bearing 13. A sealing ring 20 is sleeved on the outer side of the bearing 13. The third spring 21 is sleeved on the outer side of the small damper 22 for further buffering. A mounting hole matching the hydraulic cylinder 2 is opened on the fixed frame 1, and a buffer pressure groove matching the piston tube 19 is opened on the outer shell 16. The third spring 21 and the small damper 22 are fixedly installed in the buffer pressure groove for better buffering.

[0027] In this embodiment, when in use, the electronic control unit 3 receives data from the sensor, analyzes the current road conditions and driving style, and then automatically starts the hydraulic cylinder 2 according to a preset algorithm, thereby driving the upper pressure plate 4 fixedly connected to its output end to press down, and the upper pressure plate 4 simultaneously drives the two plug-in rods 8 and the sliding cylinder 5 to press down together, and the large damper 12 fixedly installed at the bottom of the plug-in rod 8 and the first spring 11 plus the small damper 22 fixedly installed in the outer shell 16 and the third spring 21 are adjusted to change the damping force of the shock absorber to adapt to different road conditions and driving requirements. When damping, the piston block 14 slides inside the pressure cylinder 18, and the piston block 14 cooperates with the pressure hole opened on the pressure cylinder 18 to squeeze the hydraulic oil, and then the second spring 17 cooperates with the outer shell 16 for buffering, and the third spring 21 cooperates with the small damper 22. After the compression is completed, it is prevented from rebounding too violently to damage the mechanism, and vibration and noise can be greatly reduced.

[0028] The above is a detailed introduction to an active hydraulic preload adjustable shock absorber provided by the utility model. This article uses specific embodiments to explain the principle and implementation method of the utility model. The description of the above embodiments is only used to help understand the method and core idea of ​​the utility model. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

Claims

1. An active hydraulic preload adjustable shock absorber, characterized in that: include: A fixed frame (1) and a lower pressure plate (7), wherein a hydraulic cylinder (2) is fixedly installed in the fixed frame (1), an electronic control unit (3) is fixedly installed on one side of the fixed frame (1), an upper pressure plate (4) is fixedly installed at the output end of the hydraulic cylinder (2), two plug-in rods (8) and a sliding cylinder (5) are fixedly installed at the bottom end of the upper pressure plate (4), a circular cylinder (9) is fixedly installed at the top end of the lower pressure plate (7), the plug-in rod (8) is slidably installed in the circular cylinder (9), and the plug-in rod (8) A large damper (12) and a first spring (11) are fixedly mounted at the bottom end, and the bottom ends of the large damper (12) and the first spring (11) are fixedly mounted on the top end of the lower pressure plate (7), a lower support (10) is fixedly mounted on the lower pressure plate (7), a liquid storage cylinder (6) is fixedly mounted on the top end of the lower support (10), the sliding cylinder (5) is slidably mounted in the liquid storage cylinder (6), a second vibration reduction assembly is arranged in the sliding cylinder (5), and a hydraulic vibration reduction assembly is arranged in the liquid storage cylinder (6).

2. The active hydraulic preload adjustable shock absorber according to claim 1, characterized in that: The second vibration reduction assembly comprises: a piston tube (19) and a third spring (21); the third spring (21) is fixedly mounted in an outer shell (16); the bottom end of the third spring (21) is fixedly connected to the piston tube (19); a small damper (22) is fixedly mounted in the outer shell (16); the bottom end of the small damper (22) is fixedly connected to the piston tube (19); and a connecting rod (15) is fixedly mounted at the bottom end of the piston tube (19).

3. The active hydraulic preload adjustable shock absorber according to claim 1, characterized in that: The hydraulic vibration reduction assembly comprises: a piston block (14) and a pressure cylinder (18), wherein the piston block (14) is fixedly mounted on the bottom end of a connecting rod (15), the pressure cylinder (18) is fixedly mounted in a liquid storage cylinder (6), the piston block (14) is slidably mounted in the pressure cylinder (18), a second spring (17) is fixedly mounted on the top end of the pressure cylinder (18), and the second spring (17) is fixedly mounted on the bottom end of an outer shell (16).

4. The active hydraulic preload adjustable shock absorber according to claim 3, characterized in that: The piston block (14) is provided with a plurality of flow valves, the pressure cylinder (18) is provided with a damping valve and a one-way valve, the pressure cylinder (18) is provided with a pressure groove matching the piston block (14), and a liquid storage chamber is provided between the pressure cylinder (18) and the liquid storage cylinder (6).

5. The active hydraulic preload adjustable shock absorber according to claim 1, characterized in that: The circular cylinder (9) is provided with a plug-in circular groove matching the plug-in rod (8), the large damper (12) and the first spring (11) are both fixedly installed in the plug-in circular groove, and the first spring (11) is sleeved on the outside of the large damper (12).

6. The active hydraulic preload adjustable shock absorber according to claim 2, characterized in that: A bearing (13) is fixedly installed in the outer shell (16), a movable hole matching the connecting rod (15) is opened on the bearing (13), a sealing ring (20) is sleeved on the outer side of the bearing (13), and the third spring (21) is sleeved on the outer side of the small damper (22).

7. The active hydraulic preload adjustable shock absorber according to claim 2, characterized in that: The fixed frame (1) is provided with a mounting hole matching the hydraulic cylinder (2), the outer shell (16) is provided with a buffering groove matching the piston tube (19), and the third spring (21) and the small damper (22) are fixedly mounted in the buffering groove.

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