Electronically controlled shock absorber and vehicle

Abstract

The utility model relates to an electric control shock absorber and vehicle, including inner tube and first damping device, the inner tube has first communication hole, and first damping device is connected with the cavity hydraulic pressure of inner tube radial inside through first communication hole, in the utility model, the adapter is arranged between the inner tube and first damping device, and the first end of adapter is fixedly connected with the inner tube shape cooperation, and the second end of adapter includes the plane of abutment with first damping device, and the second communication hole of hydraulic connection first communication hole and second end is possessed to adapter. The scheme has realized the hydraulic connection of inner tube inner chamber and first damping device through simple structure, lower cost adapter, and simple and compact structure is favorable for reducing production cost.

Description

Technical Field

[0001] This utility model relates to an electronically controlled shock absorber, and more particularly to a low-cost electronically controlled shock absorber for use in vehicles. Background Technology

[0002] Shock absorbers have been widely used in many fields in recent years due to their excellent performance in vibration reduction and energy absorption. For example, in automotive shock absorption systems, shock absorbers can improve vehicle handling and comfort by adjusting the damping force at different stages.

[0003] In some vibration dampers, especially in electronically controlled vibration dampers that use solenoid valves as damping devices, two intermediate cylinders are usually required to achieve damping control of the compression oil circuit or the rebound oil circuit. The intermediate cylinders need to be fixed and sealed, which makes the entire electronically controlled vibration damper complex and costly. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide an improved electronically controlled vibration damper, which has better sealing performance and simple structure.

[0005] To address the aforementioned technical problems, this utility model provides an electrically controlled vibration damper, comprising an inner cylinder and a first damping device. The inner cylinder has a first connecting hole, and the first damping device is hydraulically connected to a cavity radially inner side of the inner cylinder through the first connecting hole. In this utility model, an adapter is disposed between the inner cylinder and the first damping device. The first end of the adapter matches the shape of the inner cylinder and is fixedly connected to it. The second end of the adapter includes a plane that abuts against the first damping device. The adapter has a second connecting hole for hydraulically connecting the first connecting hole and the second end. This solution achieves the hydraulic connection between the inner cylinder cavity and the first damping device through a simple and low-cost adapter. The structure is simple and compact, which helps to reduce production costs.

[0006] According to a preferred embodiment of this utility model, the inner diameter of the first connecting hole and the second connecting hole are preferably the same. This results in a relatively smooth channel wall between the inner cylinder cavity and the first damping device, reducing pressure loss of the hydraulic medium in the channel and improving the control accuracy of the first damping device.

[0007] According to a preferred embodiment of this utility model, the adapter is welded and fixed to the inner cylinder. Welding provides a more robust connection and better sealing. The adapter can also be fixed to the inner cylinder by adhesive bonding or other methods. More preferably, the adapter is fixed to the inner cylinder by brazing. When brazing, the filler metal can fill the gap between the first end of the adapter and the inner cylinder, increasing the welding area between the first end and the inner cylinder, resulting in better sealing and less thermal impact on the inner cylinder and the adapter. Alternatively, the adapter can also be fixed to the inner cylinder by, for example, laser welding or argon arc welding around the outer edge.

[0008] According to a preferred embodiment of this utility model, the adapter is located radially inside the outer cylinder of the electronically controlled vibration damper. This design allows the adapter to be assembled with the inner cylinder and other parts to form an inner cylinder assembly, and then the inner cylinder assembly can be directly inserted into the outer cylinder, simplifying the assembly process.

[0009] According to a preferred embodiment of the present invention, a sealing ring is disposed between the adapter and the first damping device. More preferably, the second end is square, with the side length of the square being greater than the diameter of the sealing ring. Designing the second end as a square ensures that the area of ​​the region around the first connecting hole on the first end that contacts the inner cylinder is substantially the same, saving material in manufacturing the adapter while ensuring sealing. The diameter of the sealing ring is smaller than the side length of the square, ensuring complete sealing between the second end and the first damping device.

[0010] According to a preferred embodiment of this utility model, the first damping device is hydraulically connected to the lower cavity of the inner cylinder. Since the balance cavity usually contains both gas and hydraulic fluid, both damping devices of the electronically controlled shock absorber are positioned near the bottom of the inner cylinder. Therefore, the first damping device, which is hydraulically connected to the inner cylinder cavity via an adapter, is preferably hydraulically connected to the lower cavity of the inner cylinder. When the balance cavity does not contain gas, the first damping device can also be designed to be hydraulically connected to the upper cavity of the inner cylinder, or both damping devices can be hydraulically connected to the inner cylinder cavity via adapters.

[0011] More preferably, the electronically controlled shock absorber has a bottom valve assembly with an inner cylinder mounted on it. The bottom valve assembly has a check valve that restricts the flow of hydraulic medium from the axial side of the bottom valve assembly where the inner cylinder is located to the opposite side. This design moves the check valve, which replenishes hydraulic medium to the lower cavity of the inner cylinder during the rebound stroke, from the balance chamber to the bottom valve assembly, reducing the radial dimension of the electronically controlled shock absorber and facilitating its application in space-constrained scenarios such as automotive suspension systems. Alternatively, the check valve restricting the flow of hydraulic medium from the lower cavity of the inner cylinder to the balance chamber can also be designed on the first damping device.

[0012] Furthermore, the aforementioned technical problems can also be solved by vehicles equipped with any of the aforementioned electronically controlled shock absorbers. Due to the adoption of the aforementioned optimized and simple electronically controlled shock absorbers, the vehicles can be equipped with electronically controlled shock absorbers at a lower cost. Attached Figure Description

[0013] The present invention will now be described in more detail with reference to the accompanying drawings, but this does not limit the overall concept of the present invention.

[0014] Figure 1 This is a cross-sectional view of a type of electronically controlled vibration damper in the prior art;

[0015] Figure 2This is a cross-sectional view of the preferred embodiment of the present invention;

[0016] Figure 3 This is a partial enlarged cross-sectional view of a preferred embodiment of the present invention.

[0017] Figure 4 This is a schematic diagram of the adapter according to a preferred embodiment of the present invention.

[0018] In this utility model, unless otherwise specified, "axial", "radial" and "circumferential" are all relative to the electronically controlled vibration damper. Detailed Implementation

[0019] Figure 1 An electronically controlled vibration damper in the prior art is shown. To achieve damping control of the compression oil circuit and the rebound oil circuit, an electromagnetically controlled first damping device 6' and a second damping device 7' are installed on the outer cylinder 2'. To achieve hydraulic connection between the two damping devices 6' and 7' and the corresponding working cavities, a first intermediate cylinder 8' and a second intermediate cylinder 9' are additionally set between the inner cylinder 3' and the outer cylinder 2', and the second damping device 7' and the first damping device 6' are respectively installed on them. Thus, the first damping device 6' is hydraulically connected to the lower cavity of the inner cylinder 3' through a connecting hole on the lower side of the inner cylinder 3', a cavity between the second intermediate cylinder 9' and the inner cylinder 3', and a connecting hole on the second intermediate cylinder 9'. The second damping device 7' is hydraulically connected to the upper cavity of the inner cylinder 3' through a connecting hole on the upper side of the inner cylinder 3', a cavity between the first intermediate cylinder 8' and the inner cylinder 3', and a connecting hole on the first intermediate cylinder 8'. In this design, both the upper and lower ends of the first intermediate cylinder 8' and the second intermediate cylinder 9' need to be sealed and fixedly connected to the inner cylinder 3', and both need to be sealed. The first intermediate cylinder 8' and the second intermediate cylinder 9' are respectively provided with flat surfaces for mounting the second damping device 7' and the first damping device 6' by stamping. The structure is complex and difficult to process, resulting in a complex overall structure and high cost of the electronically controlled vibration damper.

[0020] Figures 2 to 4 Preferred embodiments of the present invention are shown, such as... Figures 2 to 4As shown, the electrically controlled vibration damper designed according to this utility model includes an inner cylinder 3 with a first connecting hole 31, a first damping device 6 hydraulically connected to the radially inner cavity of the inner cylinder 3 through the first connecting hole 31, and an adapter 1 disposed between the inner cylinder 3 and the first damping device 6. The first end 11 of the adapter 1 is shaped to fit the inner cylinder 3 and is fixedly connected to it. The second end 12 of the adapter 1 includes a plane that abuts against the first damping device 6. The adapter 1 is designed with a second connecting hole 13 for hydraulically connecting the first connecting hole 31 and the second end 12. With this design, the first damping device 6 can be directly hydraulically connected to the inner cavity of the inner cylinder 3 through the adapter 1, without the need for a second intermediate cylinder 9' to achieve the hydraulic connection between the inner cavity of the inner cylinder 3 and the first damping device 6. The hydraulic connection between the inner cavity of the inner cylinder 3 and the first damping device 6 is achieved through the adapter 1, resulting in a simple and compact structure with low cost.

[0021] like Figure 3 As shown, in a preferred embodiment, the first connecting hole 31 and the second connecting hole 13 are designed to have the same inner diameter. This makes the channel wall between the inner cavity of the inner cylinder 3 and the first damping device 6 relatively smooth, reducing the pressure loss of the hydraulic medium in the channel and improving the control accuracy of the first damping device 6.

[0022] like Figure 2 and Figure 3 As shown, in the preferred embodiment, the adapter 1 is welded to the inner cylinder 3. In other embodiments, the adapter 1 can also be fixed to the inner cylinder 3 by means of adhesive bonding or other methods. Welding provides a more robust connection and better sealing.

[0023] More preferably, the adapter 1 can be fixed to the inner cylinder 3 by brazing. When brazing, the brazing filler metal can fill the gap between the first end 11 of the adapter 1 and the inner cylinder 3, increasing the welding area between the first end 11 and the inner cylinder 3 and providing better sealing. In other embodiments, a ring can also be welded around the outer ring of the adapter 1 at the contact point with the inner cylinder 3 by, for example, laser welding or argon arc welding.

[0024] like Figure 2 and Figure 3 As shown, in a preferred embodiment, the adapter 1 is located radially inside the outer cylinder 2 of the electronically controlled vibration damper. This means that the dimensions of the adapter 1 ensure that it can be directly inserted into the outer cylinder 2 after assembly with the inner cylinder 3. Normally, the inner cylinder 3, the first intermediate cylinder 8, and the adapter 1 are assembled together to form the inner cylinder assembly, which is then installed into the outer cylinder 2. Therefore, the above design simplifies the assembly process and ensures that the inner cylinder assembly can be directly inserted into the outer cylinder. In other embodiments, the adapter 1 can also protrude from the outer cylinder 2. For example, the inner cylinder assembly can be tilted to allow for overall assembly into the outer cylinder 2, or the adapter 1 can be installed after the inner cylinder assembly is installed (e.g., by adhesive bonding).

[0025] like Figure 3 As shown, in a preferred embodiment, a sealing ring 4 is disposed between the adapter 1 and the first damping device 6. More preferably, the second end 12 can be designed as a square, with its side length being greater than the diameter of the sealing ring 4. Designing the second end 12 as a square ensures that the area of ​​the area around the first connecting hole 31 on the first end 11 that contacts the inner cylinder 3 is substantially the same, saving material in manufacturing the adapter 1 while ensuring sealing. The diameter of the sealing ring 4 is smaller than the side length of the square, ensuring that the second end 12 and the first damping device 6 are completely sealed by it.

[0026] like Figure 2 and Figure 3 As shown, the first damping device 6 is preferably positioned near the bottom of the inner cylinder 3, meaning that the first damping device 6 is hydraulically connected to the lower cavity of the inner cylinder 3. In most cases, hydraulic fluid and gas coexist in the balance chamber 21 of the electronically controlled vibration damper. To prevent gas from entering the various working chambers from the balance chamber 21, each damping device 6, 7 is preferably positioned near the bottom of the balance chamber 21. Therefore, the first damping device 6 connected via the adapter 1 is preferably a damping device hydraulically connected to the lower cavity of the inner cylinder 3.

[0027] In other embodiments, when there is no gas inside the balance chamber 21, for example, when the electronically controlled shock absorber is designed with an external accumulator so that the balance chamber 21 is entirely filled with hydraulic medium, the first damping device 6 can also be designed as a damping device that generates a pressure drop during the rebound stroke and is hydraulically connected to the upper cavity of the inner cylinder 3 (functionally equivalent to...). Figure 2 The second damping device 7 is hydraulically connected to the upper cavity of the inner cylinder 3 via the adapter 1, or both the first damping device 6 and the second damping device 7 are designed to be hydraulically connected to the inner cylinder 3 via the adapter 1.

[0028] like Figure 2 As shown, the electronically controlled shock absorber is designed with a bottom valve assembly 5, on which an inner cylinder 3 is mounted. The bottom valve assembly 5 is designed with a check valve 51, which restricts the hydraulic medium from flowing from the axial side of the bottom valve assembly 5 where the inner cylinder 3 is mounted. Figure 2 The upper part of the middle flows to the opposite side. Figure 2 (Lower side of the inner cylinder 3). This design moves the one-way valve 51, which replenishes hydraulic medium to the lower cavity of the inner cylinder 3 during the rebound stroke, from the balance chamber 21 to the bottom valve assembly 5, reducing the radial dimension of the electronically controlled shock absorber. This is beneficial for the application of electronically controlled shock absorbers in scenarios with limited installation space, such as automotive suspension systems. In other embodiments, the one-way valve 51, which restricts the flow of hydraulic medium from the lower cavity of the inner cylinder 3 to the balance chamber 21, can also be designed on the first damping device 6 (structure same as...). Figure 2 The second damping device 7 in the middle.

[0029] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

[0030] List of reference numerals

[0031] 1. Adapter

[0032] 11 First End

[0033] 12 Second End

[0034] 13 Second connecting hole

[0035] 2. 2' outer cylinder

[0036] 21 Balance chamber

[0037] 3' Inner cylinder

[0038] 31, 31' First connecting hole

[0039] 4. Sealing ring

[0040] 5. Bottom Valve Assembly

[0041] 51 Check Valve

[0042] 6, 6' First damping device

[0043] 7, 7' Second damping device

[0044] 8, 8' First intermediate tube

[0045] 9' Second intermediate tube

Claims

1. An electronically controlled vibration damper, comprising: - Inner cylinder (3), wherein the inner cylinder (3) has a first communicating hole (31), - A first damping device (6), wherein the first damping device (6) is hydraulically connected to the cavity on the radially inner side of the inner cylinder (3) through the first connecting hole (31). A connector (1) is provided between the inner cylinder (3) and the first damping device (6). The first end (11) of the connector (1) is shaped to fit the inner cylinder (3) and is fixedly connected to it. The second end (12) of the connector (1) includes a plane that abuts against the first damping device (6). The connector (1) has a second connecting hole (13) that hydraulically connects the first connecting hole (31) and the second end (12).

2. The electronically controlled vibration damper according to claim 1, characterized in that, The first connecting hole (31) and the second connecting hole (13) have the same inner diameter.

3. The electronically controlled vibration damper according to claim 1, characterized in that, The adapter (1) is welded and fixed to the inner cylinder (3).

4. The electronically controlled vibration damper according to claim 3, characterized in that, The adapter (1) is fixed to the inner cylinder (3) by brazing.

5. The electronically controlled vibration damper according to any one of claims 1 to 4, characterized in that, The adapter (1) is located radially inside the outer cylinder (2) of the electronically controlled vibration damper.

6. The electronically controlled vibration damper according to any one of claims 1 to 4, characterized in that, A sealing ring (4) is provided between the adapter (1) and the first damping device (6).

7. The electronically controlled vibration damper according to claim 6, characterized in that, The second end (12) is a square, and the side length of the square is greater than the diameter of the sealing ring (4).

8. The electronically controlled vibration damper according to any one of claims 1 to 4, characterized in that, The first damping device (6) is hydraulically connected to the lower cavity of the inner cylinder (3).

9. The electronically controlled vibration damper according to claim 8, characterized in that, The electronically controlled shock absorber has a bottom valve assembly (5) on which the inner cylinder (3) is mounted. The bottom valve assembly (5) has a check valve (51) that restricts the flow of hydraulic medium from the axial side of the bottom valve assembly (5) on which the inner cylinder (3) is mounted to the opposite side.

10. A vehicle having an electronically controlled shock absorber according to any one of claims 1-9.

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