An oil-liquid compensating link ring, a shock absorber assembly, and an air spring assembly

Abstract

The utility model discloses a kind of oil liquid compensation link ring, shock absorber assembly, air spring assembly, including link ring shell, link ring shell is equipped with the central passage that can be communicated with recovery cavity, at least two oil grooves are opened in link ring shell, oil groove two ends are communicated with central passage and compression cavity respectively, oil groove is connected with valve core in through elastic member, valve core moves away from compression cavity and can cause compression cavity and central passage one-way conduction. In the utility model, by setting at least two oil grooves in link ring shell and separately configuring an oil circuit that can one-way conduct compression cavity, central passage, recovery cavity in each oil groove, after long time use of shock absorber, still spare oil circuit can be provided as passage, avoid the phenomenon that shock absorber idle stroke appears in prior art.

Description

Technical Field

[0001] This utility model relates to the field of air spring technology, and more specifically to an oil compensation link ring, a shock absorber assembly, and an air spring assembly. Background Technology

[0002] When evaluating the performance of electronically controlled shock absorbers, the most intuitive indicator is the damping force characteristics at different speed ranges under tension and compression states. Several key components within the shock absorber collectively determine the range or adjustability of the damping force. Among these, adjusting the piston valve system and compression valve system is the primary means of achieving damping force adjustment. While ensuring adjustable and controllable damping force, other components also play indispensable roles. The connecting ring is one such core component; its main function within the shock absorber is to reliably connect the solenoid valve and the intermediate cylinder, ensuring the oil seal at this connection. Furthermore, in dual-valve shock absorbers, the connecting ring also performs oil compensation within the recovery chamber.

[0003] However, after prolonged use, the springs and piston valve plates may fail, leading to the phenomenon of the shock absorber having no free play. Utility Model Content

[0004] The technical problem to be solved by this utility model is how to avoid the phenomenon of free play in the shock absorber.

[0005] This utility model solves the above-mentioned technical problems through the following technical means: an oil compensation link ring, including a link ring housing, the link ring housing having a central channel that can communicate with the recovery chamber, at least two oil grooves having at least two oil grooves having at both ends that are respectively connected to the central channel and the compression chamber, the oil grooves being connected to a valve core through an elastic element, the valve core moving away from the compression chamber can cause the compression chamber to be unidirectionally connected to the central channel.

[0006] As a preferred technical solution, a second connecting hole is provided at the bottom of the oil tank to communicate with the compression chamber, and a first connecting hole is provided on the central channel to communicate with the oil tank. The movement of the valve core away from the compression chamber can cause a gap to be formed between the second connecting hole and the bottom of the valve core, and between the valve core and the first connecting hole.

[0007] As a preferred technical solution, the valve core is provided with a connecting hole three on its side, which can be aligned with the connecting hole.

[0008] As a preferred technical solution, the elastic element may be coaxial or non-coaxial with the valve core axis.

[0009] As a preferred technical solution, one end of the elastic element abuts against or is fixedly connected to the top of the oil tank, and the other end of the elastic element abuts against or is elastically connected to the valve core.

[0010] As a preferred technical solution, a spring groove is provided on the valve core, a baffle is fixedly connected to the top of the oil groove, one end of the elastic element is fixedly connected to or abuts against the baffle, and the other end of the elastic element extends into the spring groove and is fixedly connected to or abuts against the bottom of the spring groove.

[0011] As a preferred technical solution, the link ring housing includes a link ring cover and a lower link ring, which are fixed together to form two oil grooves.

[0012] As a preferred technical solution, sealing rings are provided on the connecting surfaces at the top and bottom of the connecting ring housing.

[0013] A shock absorber assembly includes an oil compensation connecting ring, a working cylinder, an intermediate cylinder, and an oil reservoir. The intermediate cylinder is located outside the working cylinder, and the oil reservoir is located outside the intermediate cylinder. A piston is provided inside the working cylinder, which divides the inner cavity of the working cylinder into a recovery chamber and a compression chamber. The recovery chamber is connected to the gap between the working cylinder and the intermediate cylinder and a central channel. A connecting hole is connected to the compression chamber through the gap between the intermediate cylinder and the oil reservoir.

[0014] An air spring assembly includes the above-mentioned shock absorber assembly and an air spring, wherein the shock absorber assembly and the air spring are assembled to form an air spring assembly.

[0015] The beneficial effects of this utility model are as follows:

[0016] (1) In this utility model, by setting at least two oil grooves in the connecting ring housing and configuring an oil circuit that can unidirectionally connect the compression chamber, the central channel and the recovery chamber in each oil groove, a spare oil circuit can still be provided as a channel after the shock absorber has been used for a long time, thus avoiding the phenomenon of shock absorber idle stroke in the prior art.

[0017] (2) In this utility model, by setting the elastic element and the valve core to be coaxial, the support force of the valve core can be improved. When the damper is under tension, the oil fills the spring groove and oil groove in the valve, forming pressure and working together with the spring force to improve the clamping effect between the valve core and the connecting hole one.

[0018] (3) In this utility model, the connecting ring body adopts a splicing design, which is divided into a split structure of connecting ring cover and lower connecting ring, reducing the assembly difficulty of the connecting ring shell. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the cross-sectional structure of the connecting ring of the shock absorber in the tensile state according to Embodiment 1 of this utility model;

[0020] Figure 2 This is a schematic diagram of the cross-sectional structure of the connecting ring of the shock absorber in the compression state, as provided in Embodiment 1 of this utility model.

[0021] Figure 3This is a schematic diagram of the cross-sectional structure of the vibration damper provided in Embodiment 1 of this utility model;

[0022] Figure 4 This is a schematic diagram of the oil flow direction inside the shock absorber provided in Embodiment 2 of this utility model;

[0023] Reference numerals: 1. Connecting ring gland; 101. Oil groove; 102. Connecting hole one; 103. Central channel; 2. Lower connecting ring; 201. Connecting hole two; 3. Baffle; 4. Spring; 5. Valve core; 501. Connecting hole three; 6. Upper sealing ring; 7. Lower sealing ring; 8. Restoration chamber; 9. Compression chamber; 10. Working cylinder; 11. Intermediate cylinder; 12. Oil reservoir. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below in conjunction with the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0025] Example 1

[0026] See Figure 1 , Figure 3 An oil compensation connecting ring includes a connecting ring housing and a valve core 5. The connecting ring housing has a central channel 103 and at least two oil grooves 101 inside. Each oil groove 101 has a corresponding connecting hole 102 at its bottom. Each oil groove 101 contains a valve core 5 that can move axially along the connecting ring housing. The valve core 5 is sized to match the connecting hole 102 and can block the connecting hole 102 under the elastic force of an elastic element, thereby opening or closing the oil passage. The connecting ring housing has a central channel 103... One end of channel 103 is connected to the solenoid valve, and the other end is connected to the recovery chamber 8 of the shock absorber. In this embodiment, the central channel 103 is coaxial with the axis of the connecting ring housing, but it can also be non-coaxial. The bottom of the connecting hole 102 is connected to the compression chamber 9 of the shock absorber. The valve core 5 is provided with a connecting hole 3 501. The central channel 103 is correspondingly provided with a connecting hole 102 that is connected to the connecting hole 3 501. The connecting hole 3 501 is a side hole opened on the valve core 5. When the connecting hole 3 501 is misaligned with the connecting hole 201 and is connected to the connecting hole 102, the oil circuit is open.

[0027] It should be noted that in this embodiment, the bottom of the oil groove 101 refers to the end of the connecting ring housing facing the damper oil reservoir 12. At least two oil grooves 101 are provided, and each oil groove 101 is provided with a unidirectional oil passage. Compared with the prior art which only provides one spring and one oil passage, after the damper has been used for a long time, a spare oil passage can still be provided as a channel, avoiding the phenomenon of damper idle stroke in the prior art. Of course, the connecting ring can also be designed according to different needs, such as setting different numbers of oil grooves 101 and corresponding numbers of valve cores 5, elastic elements, etc., such as setting three oil grooves 101, three valve cores 5, and three elastic elements, or four oil grooves 101, four valve cores 5, and four elastic elements, etc., or other numbers, such as five or six oil grooves 101, etc. In this embodiment, two oil grooves 101 are used as an example, and the two oil grooves 101 are symmetrically arranged about the connecting ring housing.

[0028] See Figure 1 In this embodiment, the elastic element is a spring 4. One end of the spring 4 is abutted or fixedly connected to the top of the oil tank 101, and the other end is abutted or fixedly connected to the valve core 5. That is, in the initial state, due to the elastic force of the spring 4, the valve core 5 is pressed against the connecting hole 102. At this time, the connecting hole 3 501 is aligned with the connecting hole 102 and is fully connected. By setting the two ends of the spring 4 to the top of the oil tank 101 and the valve core 5 respectively as fixed connections, the stability of the valve core 5 in sealing the connecting hole 102 can be improved, and the stability of the connection between the spring 4 and the top of the oil tank 101 and the valve core 5 can be prevented due to the oil entering the oil tank 101 and the valve core 5 when the damper is in the compressed state.

[0029] See Figure 1 To further improve the connection stability of spring 4, a baffle 3 is fixedly connected to the inner wall of the top of the connecting ring housing. A spring groove is opened in the valve core 5 for installing the spring. The spring groove is connected to the connecting hole 3 501. One end of the spring 4 abuts or is fixedly connected to the baffle 3, and the other end abuts or is fixedly connected to the spring groove. In this embodiment, the spring 4 and the valve core 5 are coaxial to improve the stable support force. In the initial state, when the spring 4 presses the valve core 5 against the connecting hole 102, there is a gap between the plane where the top of the valve core 5 is located and the plane where the bottom of the baffle 3 is located. The end of the valve core 5 facing the connecting hole 102 is set in the shape of a boss.

[0030] See Figure 1To reduce the assembly difficulty of the connecting ring housing, the connecting ring body in this embodiment adopts a splicing design, that is, a split structure consisting of a connecting ring cover 1 and a lower connecting ring 2. The oil groove 101 is opened at the end of the lower connecting ring 2 facing the connecting ring cover 1, which can be opened by machining. Of course, the connecting ring cover 1 and the lower connecting ring 2 can also be enclosed and fixed to form two oil grooves 101. The outer circumferential wall of the top of the lower connecting ring 2 is provided with a mating step. The outer circumferential edge of the connecting ring cover 1 is folded down to form an annular connecting part that matches the mating step, and is fixedly connected to the mating step through the annular connecting part. It can be an interference fit, a threaded fit, or other fixing methods. The top of the lower connecting ring 2 is also provided with a connecting step that matches the baffle, so as to ensure that when the baffle 3 is installed on the lower connecting ring 2, the plane where the top of the baffle 3 is located is coplanar with the plane where the top of the lower connecting ring 2 is located, so that the two form a plane. The bottom of the lower connecting ring 2 is provided with a boss, which makes the entire connecting ring housing roughly form a T-shaped structure.

[0031] The connecting surfaces at the top and bottom of the connecting ring housing are equipped with sealing rings. The top of the connecting ring cover 1 is fixed with an upper sealing ring 6, and the bottom boss of the lower connecting ring 2 is circumferentially fixed with a lower sealing ring 7. A solenoid valve is also fixed at the top of the connecting ring housing.

[0032] When the shock absorber is in a stretched state, the recovery chamber 8 forms a high-pressure chamber and the compression chamber 9 forms a low-pressure chamber. Under this condition, the oil circuit is not open, and the oil in the recovery chamber 8 will flow to the compression chamber 9 through the connecting ring. The specific oil flow path is abcd. The bypass oil of the shock absorber first enters the central channel 103 of the connecting ring. At this time, the connecting hole 102 and the connecting hole 301 are fully connected. The oil flows into the oil groove 101 through the connecting hole 102 and the connecting hole 301. The oil fills the spring groove in the valve core 5 and the oil groove 101, forming a pressure F. The pressure F acts on the valve core 5 and works together with the elasticity of the spring 4 to improve the sealing effect between the valve core 5 and the connecting hole 102, thereby sealing the lower through hole of the connecting ring, i.e., the connecting hole 102, and sealing the oil groove 101. As the volume of oil tank 101 decreases due to the continuous inflow of oil, the oil then re-enters the central channel 103 through connecting hole three 501 and connecting hole one 102, and finally flows to the solenoid valve.

[0033] When the shock absorber is in a compressed state, the recovery chamber 8 forms a low-pressure chamber, and the compression chamber 9 forms a high-pressure chamber. Under this condition, the oil circuit is open, and the high-pressure oil in the main chamber of the shock absorber flows to the solenoid valve through the connecting ring. The specific oil flow path is efgh, where the high-pressure oil in the main chamber flows to the connecting hole 102 of the connecting ring. The oil pressure acts on the bottom of the valve core 5, pushing it to overcome the resistance of the spring 4 and move upward until the spring 4 is compressed to a tight state. At this time, the oil can enter the oil groove 101 in the connecting ring through the gap between the valve core 5 and the oil groove 101, and then flow into the central channel 103 along the connecting hole 102 and finally into the chamber between the intermediate cylinder 11 and the working cylinder 10 of the shock absorber. This connecting ring structure solves the problem of the shock absorber experiencing idle stroke due to untimely oil compensation when the shock absorber is in a compressed state.

[0034] Example 2

[0035] The difference between this embodiment and Embodiment 1 is that it provides a damper assembly including the oil compensation link ring of Embodiment 1. This damper assembly includes a working cylinder 10, an intermediate cylinder 11, and an oil reservoir 12. The intermediate cylinder 11 is located outside the working cylinder 10, and the oil reservoir 12 is located outside the intermediate cylinder 11. A piston is provided inside the working cylinder 10, dividing the inner cavity of the working cylinder 10 into a recovery chamber 8 and a compression chamber 9. The recovery chamber 8 is connected to the gap between the working cylinder 10 and the intermediate cylinder 11, and to the central channel 103. A connecting hole 102 communicates with the compression chamber 9 through the gap between the intermediate cylinder 11 and the oil reservoir 12.

[0036] Example 3

[0037] The difference between this embodiment and embodiment 2 is that an air spring assembly including the shock absorber in embodiment 2 is provided, which is formed by assembling the shock absorber and the air spring.

[0038] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. An oil-compensating connecting ring, characterized in that, It includes a link ring housing, which has a central channel that can communicate with the recovery chamber. At least two oil grooves are provided inside the link ring housing. The two ends of the oil grooves are respectively connected to the central channel and the compression chamber. The oil grooves are connected to the valve core through an elastic element. The valve core can move away from the compression chamber to make the compression chamber and the central channel unidirectionally connected.

2. The oil compensation link ring according to claim 1, characterized in that, The bottom of the oil tank has a second connecting hole that communicates with the compression chamber, and the center channel has a first connecting hole that communicates with the oil tank. The movement of the valve core away from the compression chamber can cause gaps to form between the second connecting hole and the bottom of the valve core, and between the valve core and the first connecting hole.

3. The oil compensation link ring according to claim 2, characterized in that, The valve core has a three-way connecting hole on its side that can be aligned with the connecting hole.

4. The oil compensation link ring according to claim 1, characterized in that, The elastic element may be coaxial or non-coaxial with the valve core axis.

5. The oil compensation link ring according to claim 1, characterized in that, One end of the elastic element abuts against or is fixedly connected to the top of the oil tank, and the other end of the elastic element abuts against or is elastically connected to the valve core.

6. An oil-compensating connecting ring according to claim 1 or 5, characterized in that, The valve core has a spring groove, and a baffle is fixedly connected to the top of the oil groove. One end of the elastic element is fixedly connected to or abuts against the baffle, and the other end of the elastic element extends into the spring groove and is fixedly connected to or abuts against the bottom of the spring groove.

7. The oil compensation link ring according to claim 1, characterized in that, The connecting ring housing includes a connecting ring cover and a lower connecting ring, which are enclosed and fixed to form two oil grooves.

8. The oil compensation link ring according to claim 1, characterized in that, The connecting surfaces at the top and bottom of the connecting ring housing are equipped with sealing rings.

9. A shock absorber assembly, characterized in that, Includes the oil compensation link ring, working cylinder, intermediate cylinder, and oil reservoir as described in any one of claims 1-8. The intermediate cylinder is located outside the working cylinder, and the oil reservoir is located outside the intermediate cylinder. A piston is provided inside the working cylinder, which divides the inner cavity of the working cylinder into a restoration chamber and a compression chamber. The restoration chamber is connected to the gap between the working cylinder and the intermediate cylinder and the central channel. A connecting hole 1 is connected to the compression chamber through the gap between the intermediate cylinder and the oil reservoir.

10. An air spring assembly, characterized in that, Includes the shock absorber assembly as described in claim 9.

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