Intermediate cylinder sub-assembly of electric control shock absorber

Abstract

The utility model discloses an intermediate cylinder sub-assembly of an electric control shock absorber. The intermediate cylinder sub-assembly comprises a working cylinder and an intermediate cylinder, the working cylinder is coaxially sleeved with the three middle cylinders, the three middle cylinders are distributed at intervals in the length direction of the working cylinder, and the lengths of the three middle cylinders are different; sleeve connecting bases are coaxially connected between every two adjacent middle cylinders in an interference fit mode, connecting through holes are formed in the side walls of the two sleeve connecting bases in a penetrating mode, and a sealing ring used for isolating cavities on the two sides of one of the two sleeve connecting bases is installed on the inner side wall of one of the two sleeve connecting bases. The intermediate cylinder sub-assembly of the electric control shock absorber can meet the bandwidth requirement of a double-valve electric control shock absorber, and provides a larger damping adjusting range compared with a single-valve electric control shock absorber; meanwhile, the intermediate cylinder sub-assembly of the electric control shock absorber can meet more customer requirements while reducing the cost.

Description

TECHNICAL FIELD

[0001] The utility model relates to a shock absorber technical field especially relates to a kind of intermediate cylinder subassembly in electric control shock absorber. BACKGROUND

[0002] Electric control shock absorber is the important component of electric control suspension system, and main function is to reduce the vibration and jolt of vehicle when driving on uneven road, to improve ride comfort and operating stability. Its working principle is when the frame (or vehicle body) and axle relative movement appear between vibration, piston in shock absorber moves up and down, and oil in shock absorber cavity repeatedly flows into another cavity from one cavity through different gap. At this time, the friction between hole wall and oil and the internal friction between oil molecules form damping force to vibration, so that automobile vibration energy is converted into oil heat energy, and then absorbed by shock absorber and dissipated to atmosphere.

[0003] Conventional shock absorber has passive shock absorber and single valve shock absorber, and passive shock absorber damping force is determined in later period and cannot be adjusted, and only motion mode or comfort mode can be selected;Single valve shock absorber increases an oil circuit, and oil passes through electromagnetic valve in compression and recovery stroke, to realize the function of adjusting damping force. However, this single valve shock absorber cannot realize independent control in compression and recovery process, and damping force adjustment range is small, and flexibility is poor, so it cannot meet the requirement of electric control shock absorber damping force of current host factory.

[0004] Based on this, the utility model provides an intermediate cylinder subassembly of electric control shock absorber to solve the problems mentioned above. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing an intermediate cylinder subassembly of electric control shock absorber, which can reduce cost, meet double valve damping control and more customer requirements.

[0006] To solve the above technical problems, the utility model provides an intermediate cylinder subassembly of electric control shock absorber, which comprises a working cylinder and an intermediate cylinder.

[0007] The intermediate cylinder is coaxially sleeved outside the working cylinder, and there are three intermediate cylinders, which are distributed along the length direction of the working cylinder.

[0008] The sleeve connecting seat is coaxially connected between two adjacent intermediate cylinders.

[0009] Among the three intermediate cylinders, the intermediate cylinder between the two sleeve connecting seats is fixed with the sleeve connecting seat by interference press fitting or welding, and the other two intermediate cylinders are fixed with the sleeve connecting seat by interference press fitting.

[0010] Two connecting through holes are formed in the side walls of the sleeve connecting seats, a sealing ring for isolating the two chambers on the two sides of one of the sleeve connecting seats is mounted on the inner side wall of the sleeve connecting seat, and the sealing ring is located between the two connecting through holes.

[0011] Further, the intermediate cylinder sub-assembly of the electric control shock absorber further comprises a guide and a bottom valve.

[0012] The guide and the bottom valve are respectively interference-fitted at the two ends of the working cylinder, and the guide and the bottom valve are respectively interference-fitted with the two intermediate cylinders at the two ends of the working cylinder.

[0013] Further, a central through hole is formed in the middle of the guide, and an oil scraping ring is mounted in the central through hole.

[0014] Further, the side wall of the guide has a flow-through groove, and the side wall of the end of the working cylinder away from the guide is provided with a communication hole.

[0015] Further, the number of the communication holes is 4-8.

[0016] Further, the diameter of the communication holes is φ4mm-φ12mm.

[0017] Further, an annular sealing groove is formed in the inner side wall of one of the sleeve connecting seats, and the sealing ring is clamped and mounted in the annular sealing groove.

[0018] Further, annular connection grooves for matching the intermediate cylinders are formed in the inner side walls of the two sleeve connecting seats.

[0019] Further, positioning notches are arranged on the outer side walls of the sleeve connecting seats at positions on the two sides of the connecting through holes.

[0020] Further, an adapter ring sealing ring is mounted in the connecting through hole.

[0021] Compared with the prior art, the electric control shock absorber intermediate cylinder sub-assembly has at least the following beneficial effects:

[0022] (1) The electric control shock absorber intermediate cylinder sub-assembly can meet the bandwidth requirement of the double-valve electric control shock absorber, and provide a larger damping adjustment range than the single-valve electric control shock absorber.

[0023] (2) The manufacturing and assembly processes of the intermediate cylinder sub-assembly of the electronically controlled vibration damper provided by this utility model are simple. At the same time, for vibration dampers of the same specification, the requirements of different projects for different solenoid valve heights and angles can be met by adjusting the length of the intermediate cylinder installed between the two sleeve connecting seats. This makes the sleeve connecting seats universal and can be mass-produced. In other words, the intermediate cylinder sub-assembly of the electronically controlled vibration damper provided by this utility model can meet more customer needs while reducing costs. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the intermediate cylinder sub-assembly of the electronically controlled shock absorber in this embodiment of the present invention;

[0025] Figure 2 This is a schematic diagram of the structure of one of the sleeve connecting seats in the intermediate cylinder sub-assembly of the electronically controlled vibration damper in this practical embodiment. Detailed Implementation

[0026] The intermediate cylinder sub-assembly of the electronically controlled shock absorber of this utility model will be described in more detail below with reference to the schematic diagrams, which illustrate preferred embodiments of this utility model. It should be understood that those skilled in the art can modify the utility model described herein while still achieving the advantageous effects of this utility model. Therefore, the following description should be understood as being of general knowledge to those skilled in the art and is not intended to limit this utility model.

[0027] The present invention will be described in more detail below by way of example with reference to the accompanying drawings. The advantages and features of the present invention will become clearer from the following description. It should be noted that the drawings are in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of the present invention.

[0028] like Figure 1 As shown in the figure, this utility model embodiment proposes an intermediate cylinder sub-assembly of an electronically controlled vibration damper, including a working cylinder 1 and an intermediate cylinder 2; the intermediate cylinder 2 is coaxially sleeved outside the working cylinder 1, and there are three intermediate cylinders 2, which are distributed at intervals along the length direction of the working cylinder 1; two adjacent intermediate cylinders 2 are coaxially interference-fitted with sleeve connecting seats 3, wherein the intermediate cylinder 2 located between two sleeve connecting seats 3 is interference-fitted or welded to the sleeve connecting seat 3 (including but not limited to laser welding, electromagnetic welding, etc.), and the other two intermediate cylinders 2 are interference-fitted to the sleeve connecting seat 3; the side walls of the two sleeve connecting seats 3 are provided with through holes 31, and the inner side wall of one of the two sleeve connecting seats 3 is equipped with a sealing ring 4 for isolating the two chambers on both sides, and the sealing ring 4 is located between the two through holes 31.

[0029] In the embodiment, the connecting through hole 31 is used to realize the communication between the intermediate cylinder chamber and the electromagnetic valve, and through the arrangement of the two sleeve connecting seats 3 with the connecting through hole 31, the intermediate cylinder sub-assembly of the electric control shock absorber provided by the embodiment can meet the bandwidth requirement of the double-valve electric control shock absorber, and a larger damping adjustment range can be provided than the single-valve electric control shock absorber.

[0030] In the embodiment, further, the interference fit connection is adopted between the three intermediate cylinders 2 and the sleeve connecting seat 3, or the interference fit and welding connection are adopted, which reduces the use of the sealing element, is more convenient to assemble, and reduces the cost.

[0031] In addition, the sleeve connecting seat 3 can be formed by turning a cylindrical body with a specified length, and the manufacturing process is simple, and for the same specification of the shock absorber, the length of the intermediate cylinder 2 installed between the two sleeve connecting seats 3 can be adjusted to meet the requirements of different projects for different electromagnetic valve heights and angles. Specifically, during assembly, the positions of the three intermediate cylinders 2 can be adjusted to combine multiple installation modes of different double-valve height differences, and the installation directions of the connecting through holes 31 of the two sleeve connecting seats 3 can be adjusted to adjust the installation angle of the double valve.

[0032] In summary, the intermediate cylinder sub-assembly of the electric control shock absorber provided by the utility model can meet more customer requirements while reducing the cost.

[0033] In the above embodiment, the intermediate cylinder sub-assembly of the electric control shock absorber further comprises a guide 5 and a bottom valve 6; the guide 5 and the bottom valve 6 are interference fitted at both ends of the working cylinder 1 respectively, and the guide 5 and the bottom valve 6 are interference fitted with the two intermediate cylinders 2 at both ends of the working cylinder 1 respectively. Through the arrangement of the two sleeve connecting seats 3, the guide 5 and the bottom valve 6, stable sealing installation of all intermediate cylinders is realized.

[0034] In the above embodiment, a center through hole is formed in the middle of the guide 5, and an oil scraping ring 6 is installed inside the center through hole. The center through hole is used to guide the installation of the piston rod, and the oil scraping ring 6 is arranged to scrape the surface of the installed piston rod.

[0035] In addition, the side wall of the guide 5 has a flow-through groove 51, and the side wall of the working cylinder 1 away from the guide 5 is provided with a communication hole 11. Through the arrangement of the flow-through groove 51 and the communication hole 11, an oil liquid intercommunication channel is provided between the working cylinder 1 and the two intermediate cylinder chambers, and the effective control of the double electromagnetic valve is ensured.

[0036] Further, the number of the communication holes 11 is 4-8, and the hole diameter of the communication holes 11 is φ4mm-φ12mm, which ensures the control effect of the electromagnetic valve.

[0037] In the above embodiment, the outer side wall of the sleeve connecting seat 3 is provided with a positioning notch 33 at the position on both sides of the connecting through hole 31, thereby improving the precision and efficiency of mounting the electromagnetic valve and the shock absorber sealing.

[0038] Specifically, the positioning notch 33 is mainly used in cooperation with the simulation tooling of the electromagnetic valve, and the end of the simulation tooling is provided with a positioning block matched with the positioning notch 33.

[0039] (1) Installation positioning: the end of the simulation tooling is inserted into the connecting through hole 31, the axial position is aligned, the positioning block at the end of the simulation tooling is inserted into the positioning notch 33, radial positioning (preventing the tooling from rotating or deviating in the through hole) is realized, and the installation posture is ensured to be accurate (simulating the installation position of the real electromagnetic valve).

[0040] (2) The simulation tooling and the shock absorber shell are fixed by using screws and other fasteners, the installation fastening force of the real electromagnetic valve is simulated, the position of the simulation tooling is ensured to be stable during the sealing process, and the sealing precision is prevented from being affected by vibration or displacement.

[0041] (3) The sealing part of the shock absorber is processed by taking the simulation tooling as a positioning reference, the sealing size and the sealing property are ensured to meet the design requirements, after the sealing is completed, the simulation tooling is removed, the real electromagnetic valve is installed, and finally oil is injected (filling the working medium of the shock absorber, such as hydraulic oil).

[0042] Necessarily, in order to ensure the sealing property between the electromagnetic valve and the side wall of the connecting through hole 31, the adapter ring sealing ring 7 is installed in the inner side of the connecting through hole 31.

[0043] In a preferred embodiment, in combination with the description of the above-mentioned embodiment, Figure 2 One of the inner side walls of the two sleeve connecting seats 3 is provided with an annular sealing groove 32, and the sealing ring 4 is clamped and installed in the annular sealing groove 32. The annular sealing groove 32 is used for limiting and clamping the sealing ring 4, so that the stability of the sealing ring 4 is ensured.

[0044] Further, the annular connection grooves are arranged at both ends of the inner side of the sleeve connecting seat 3, which are used for cooperating with the intermediate cylinder 2, so that the intermediate cylinder 2 is effectively installed in interference and is provided with end positioning.

[0045] In summary, the intermediate cylinder sub-assembly of the electric control shock absorber provided by the utility model has at least the following advantages compared with the prior art:

[0046] The intermediate cylinder sub-assembly of the electric control shock absorber provided by the utility model can meet the bandwidth requirement of the double-valve electric control shock absorber, and provide a larger damping adjustment range than the single-valve electric control shock absorber.

[0047] Further, the electric control shock absorber middle cylinder subassembly structure design and assembly process are simple, and multiple arrangements of the installation height difference and angle of the two electromagnetic valves can be realized during assembly, so that more customer demands can be met while reducing the cost.

[0048] Obviously, various modifications and changes can be made to the present application without departing from the spirit and scope thereof. Accordingly, such modifications and changes are intended to fall within the scope of the application as defined in the appended claims.

Claims

1. A sub-assembly of an intermediate cylinder for an electronically controlled shock absorber, characterized in that, Including the working cylinder and the intermediate cylinder; The intermediate cylinder is coaxially sleeved outside the working cylinder. There are three intermediate cylinders, and the three intermediate cylinders are distributed at intervals along the length direction of the working cylinder. Each of the two adjacent intermediate cylinders is coaxially connected by a sleeve connecting seat; Among them, the intermediate cylinder located between the two sleeve connecting seats of the three intermediate cylinders is fixed to the sleeve connecting seat by interference fit or welding, and the other two intermediate cylinders of the three intermediate cylinders are fixed to the sleeve connecting seat by interference fit. Both of the sleeve connecting seats have through holes on their side walls. One of the sleeve connecting seats has a sealing ring installed on its inner side wall to isolate the two chambers on either side. The sealing ring is located between the two through holes.

2. The intermediate cylinder sub-assembly of the electronically controlled shock absorber as described in claim 1, characterized in that, It also includes a guide and a foot valve; The guide and the bottom valve are respectively interference-fitted to both ends of the working cylinder, and the guide and the bottom valve are respectively interference-fitted to the two intermediate cylinders located at both ends of the working cylinder.

3. The intermediate cylinder sub-assembly of the electronically controlled vibration damper as described in claim 2, characterized in that, The guide has a central opening in the middle, and an oil scraper ring is installed inside the central opening.

4. The intermediate cylinder sub-assembly of the electronically controlled vibration damper as described in claim 2, characterized in that, The guide has a flow groove on its side wall, and the working cylinder has a connecting hole on the side wall away from the guide.

5. The intermediate cylinder sub-assembly of the electronically controlled vibration damper as described in claim 4, characterized in that, The number of connecting holes is 4-8.

6. The intermediate cylinder sub-assembly of the electronically controlled vibration damper as described in claim 5, characterized in that, The diameter of the connecting hole is φ4mm~φ12mm.

7. The intermediate cylinder sub-assembly of the electronically controlled vibration damper as described in claim 1, characterized in that, One of the two sleeve connecting seats has an annular sealing groove on its inner side wall, and the sealing ring is clamped and installed in the annular sealing groove.

8. The intermediate cylinder sub-assembly of the electronically controlled vibration damper as described in claim 1, characterized in that, Both ends of the inner side of the sleeve connecting seat are provided with annular connecting grooves for mates with the intermediate cylinder.

9. The intermediate cylinder sub-assembly of the electronically controlled vibration damper as described in claim 1, characterized in that, The outer wall of the sleeve connector is provided with positioning slots on both sides of the connecting through hole.

10. The intermediate cylinder sub-assembly of the electronically controlled shock absorber as described in claim 1, characterized in that, An adapter ring seal is installed inside the connecting through hole.

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