Inverted magneto-rheological shock absorber suitable for Macpherson suspension

Abstract

The utility model relates to an inverted magneto-rheological shock absorber suitable for a Macpherson suspension, which comprises an outer pipe, an inner pipe, a magneto-rheological shock absorber and a magneto-rheological shock absorber, the working bar is sleeved with the outer pipe, and a supporting pipe is further arranged between the working bar and the outer pipe; a three-cylinder structure is formed among the outer pipe, the supporting pipe and the working lever; the piston structure comprises a fixed end, a piston rod and a piston body, the fixed end is arranged at the lower end of the outer pipe, one end of the piston rod is connected to the fixed end, the other end of the piston rod is connected with the piston body, the piston body is movably sleeved with the working lever through a sealing structure, and damping liquid is arranged in the working lever to provide damping force between the working lever and the piston body. The utility model provides an inverted magneto-rheological shock absorber which improves rigidity and is suitable for a Macpherson suspension.

Description

Technical Field

[0001] This utility model relates to the field of automotive shock absorbers, and in particular to an inverted magnetorheological shock absorber suitable for MacPherson suspension. Background Technology

[0002] The MacPherson strut suspension, a widely used automotive suspension system, boasts advantages such as simple structure, low cost, and small space occupation. Its structure and performance parameters directly impact a vehicle's ride comfort and handling stability. It is one of the most popular independent suspension systems today, typically used on the front wheels of passenger cars. However, under complex road conditions, especially when the vehicle is cornering or subjected to lateral forces, the shock absorbers of a traditional MacPherson strut suspension may experience increased friction and accelerated seal wear due to the large bending moment and lateral forces, leading to shock absorber oil leakage problems. This can affect handling performance and ride comfort. Summary of the Invention

[0003] In order to overcome at least one of the problems mentioned above, this utility model provides an inverted magnetorheological damper with improved stiffness, suitable for MacPherson strut suspension.

[0004] It increases the lateral stiffness of the shock absorber through a three-cylinder structure and improves the service life of the shock absorber through a piston rod protection structure. It also adopts the continuously adjustable damping force characteristic of the magnetorheological shock absorber to improve the vehicle's comfort and handling, while reducing the vehicle's roll angle.

[0005] The technical solution adopted by this utility model to solve its technical problem is: an inverted magnetorheological damper suitable for MacPherson suspension, comprising:

[0006] The outer tube is surrounded by a support assembly;

[0007] The working bar is fitted inside the outer tube, and a support tube is also installed between the working bar and the outer tube; the outer tube, the support tube, and the working bar form a three-cylinder structure;

[0008] The piston structure includes a fixed end, a piston rod, and a piston body. The fixed end is located at the lower end of the outer tube. One end of the piston rod is connected to the fixed end, and the other end is connected to the piston body. The piston body is movably fitted into the working lever through a sealing structure. The working lever is provided with damping fluid to provide damping force between the working lever and the piston body.

[0009] Preferably, the device also includes a magnetorheological system, comprising an electromagnetic control system and a magnetorheological fluid; the magnetorheological fluid is a damping fluid disposed within the working bar, and the electromagnetic control system alters the flowability of the magnetorheological fluid to adjust the continuous damping force of the shock absorber.

[0010] Preferably, the electromagnetic control system includes an electromagnet core, an electromagnetic coil wound around the periphery of the electromagnet core, and an electromagnetic sleeve disposed on the outer edge. When the electromagnetic coil is energized, it generates a magnetic field, which changes the fluidity of the magnetorheological fluid, thereby adjusting the continuous damping force of the shock absorber. The electromagnet core is disposed on the piston body.

[0011] Preferably, the electromagnetic control system further includes a wire that passes through the outer tube, the fixed end, and the piston rod, and is connected to the electromagnetic coil. The piston rod and piston body have a through hole in the middle for the wire to pass through. The end of the wire is provided with an insulated wire terminal, which is disposed in the piston body.

[0012] Preferably, the piston body is provided with an aluminum cap at its end.

[0013] Preferably, a floating piston is provided on the upper part of the working lever, and the upper space formed by the floating piston and the working lever is filled with high-pressure nitrogen.

[0014] Preferably, a Teflon sleeve is also provided between the working bar and the support tube.

[0015] Preferably, the bracket assembly includes: a cable bracket, a stabilizer bracket, and a ram's horn bracket.

[0016] Preferably, the piston rod is provided with a guide, a protective cover, and an oil seal along its outer edge; a buffer pad is also provided between the protective cover and the piston body.

[0017] The beneficial effects of this utility model are as follows: An inverted magnetorheological damper suitable for MacPherson strut suspension increases the lateral stiffness of the damper through a three-cylinder structure and improves the service life of the damper through a piston rod protection structure. Furthermore, the continuously adjustable damping force characteristic of the magnetorheological damper enhances vehicle comfort and handling while reducing vehicle roll angle. It significantly improves lateral force resistance: by modifying the piston rod of the traditional damper into a main working rod and adding two auxiliary guides, the overall structure of the damper is more stable, effectively dispersing and balancing lateral forces, reducing the stress on the piston rod and its sealing structure, and extending its service life. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] Figure 1 This is a schematic diagram of the overall structure of the inverted magnetorheological damper for MacPherson suspension described in this utility model;

[0020] Figure 2 This is a schematic cross-sectional view of the inverted magnetorheological damper for MacPherson strut suspension described in this utility model.

[0021] Figure 3This is a utility model Figure 2 A cross-sectional structural diagram. Detailed Implementation

[0022] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0023] like Figure 1 , 2 The inverted magnetorheological damper shown, suitable for MacPherson strut suspension, consists of an outer tube 33, a working rod 36, and a support tube 30, forming a three-cylinder structure. It comprises a main working rod 36 and two auxiliary conduits (support tube 30 and outer tube 33). The main working rod 36 replaces the piston rod portion of a traditional damper, becoming the primary working area for the magnetorheological fluid. The two auxiliary conduits are connected to both sides of the main working rod, forming a circulating motion system used to disperse and balance lateral forces.

[0024] Significantly improves lateral force resistance: By modifying the piston rod of the traditional shock absorber into the main working rod and adding two auxiliary guides, the overall structure of the shock absorber is more stable, which can effectively disperse and balance lateral forces, reduce the stress on the piston rod and its sealing structure, and extend its service life.

[0025] The piston structure consists of a fixed end, a piston rod 25, and a piston body. The fixed end is located at the lower end of the outer tube 33. One end of the piston rod 25 is connected to the fixed end, and the other end is connected to the piston body. The piston body is movably fitted inside the working lever 36 through a sealing structure. Damping fluid is installed inside the working lever 36 to provide damping force between the working lever and the piston body.

[0026] The magnetorheological system includes an electromagnetic control system and a magnetorheological fluid 15. In this embodiment, the magnetorheological fluid 15 is a damping fluid disposed in the working bar. The electromagnetic control system changes the fluidity of the magnetorheological fluid, thereby adjusting the continuous damping force of the shock absorber.

[0027] The electromagnetic control system consists of an electromagnet core 12, an electromagnetic coil 13 wound around the periphery of the electromagnet core 12, and an electromagnetic sleeve 11 disposed on the outer edge. When the electromagnetic coil 13 is energized, it generates a magnetic field, which changes the fluidity of the magnetorheological fluid 15, thereby adjusting the continuous damping force of the shock absorber and realizing the continuous adjustable damping force. The electromagnet core 12 is disposed on the piston body. In one embodiment, the piston body is the electromagnet core 12, and the piston body is formed by the electromagnet core 12.

[0028] Optimized damping effect: Through the core technology of magnetorheological dampers, the damping force can be continuously adjusted in a fast and high-precision manner, which not only gives the vehicle excellent handling and comfort.

[0029] Specific implementation structure:

[0030] The electromagnetic control system's wiring has one end of wire 1 soldered to a rubber-coated wire terminal 14, and the other end connected to the vehicle's power supply, which provides different signal currents to the power system. An electromagnetic coil 13 is evenly wound within a rectangular groove of the electromagnet core 12. The electromagnet core 12, electromagnetic coil 13, and wire terminal 14 are injection molded as a single piece with rubber coating. A through-hole is machined into the inner wall of the piston rod 25, through which the wire 1 passes. A retaining ring groove is machined into the outer wall of the piston rod 25 to install a retaining ring 9, and an O-ring 10 is installed in the rectangular groove. The piston rod 25 is fitted seamlessly with the electromagnet core 12. The O-ring 12 in the rectangular groove of the piston rod ensures a seal between the piston rod 25 and the electromagnet core 12. Aluminum caps 31 are used at both ends of the electromagnet core 12, and a stainless steel electromagnetic sleeve 11 is used along its outer edge for clamping and riveting to prevent magnetic interference. The retaining ring 9 and the aluminum caps 31 are press-fitted together to prevent the piston body from dislodging and the piston rod from rotating.

[0031] The floating piston 35 inside the working lever 36 has two rectangular grooves machined along its outer edge. An O-ring 17 and a wear ring 16 are fitted onto it. The O-ring 17 seals the top of the working lever 36 with high-pressure nitrogen 37, providing a counterforce for the magnetorheological damper. The wear ring 16 contacts the working lever 36, improving its wear resistance and extending the damper's lifespan. Magnetorheological fluid 15 is injected into the lower part of the working lever 36, located between the piston body and the floating piston 35.

[0032] See Figure 3 The piston rod 25 has an outer edge located below the piston body and is fastened with a buffer block 8 installed between the piston body assembly and the guide 26 to prevent metal-to-metal impact between the aluminum pressure cap 31 and the guide 26. The guide 26 has a sealing ring 5, an O-ring 6, and an oil seal 28 on its outer edge, forming a sealing structure to prevent oil leakage from the magnetorheological damper. The guide retaining ring 7 engages with a groove on the inner wall of the working lever 36 to fix the position of the guide 26; the working lever 36 port is press-fitted with a protective cap 27.

[0033] See Figure 3 The connection structure between the working bar 36, the outer tube 33, and the support tube 30 is as follows: a Teflon sleeve 29 is installed on the outer edge of the working bar 36, and sealing rings 33 are installed at both ends to improve the wear resistance of the working bar 36. The support tube 30 is installed on the outer edge of the Teflon sleeve 29 to disperse the lateral force of the working bar 36 and to rivet and fix the sealing rings 33. The outer tube 32 is installed on the outer edge of the support tube 30. The support tube 30 is fixed by the inner flange at the top of the outer tube 32. The dust cover 34 is interference fitted at the opening of the outer tube 32 to prevent foreign objects from entering and shorten the wear life of the Teflon sleeve 29.

[0034] See Figure 2The bracket assembly structure includes: an outer tube 32 welded with a bracket 4 for connecting the MacPherson strut suspension balance and stability components of the vehicle; an outer tube 32 welded with a wire bracket 3 for fixing the wire 1; and a steering knuckle bracket 24 welded to it for connecting the steering knuckle of the vehicle's MacPherson strut suspension.

[0035] The fixed end structure of the piston structure includes a limiting block 23, an inner support plate 22, and a buffer pad 21 installed on the inner wall of the outer tube 32 to limit and protect the compression stroke of the shock absorber. The piston rod 25 passes through the limiting block 23, the inner support plate 22, the buffer pad 21, the fixing sleeve 20, and the fixing cover 2, and is locked with a hexagonal lock nut 19. A dust cover 18 is interference-fitted to the bottom of the outer tube 32 to prevent foreign objects such as mud and sand from entering.

[0036] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. An inverted magnetorheological damper suitable for MacPherson strut suspension, characterized in that, include: The outer tube is surrounded by a support assembly; The working lever is fitted inside the outer tube, and a support tube is also provided between the working lever and the outer tube; the outer tube, the support tube, and the working lever form a three-cylinder structure; The piston structure includes a fixed end, a piston rod, and a piston body. The fixed end is located at the lower end of the outer tube. One end of the piston rod is connected to the fixed end, and the other end is connected to the piston body. The piston body is movably fitted into the working lever through a sealing structure. The working lever is provided with damping fluid to provide damping force between the working lever and the piston body.

2. The inverted magnetorheological damper for MacPherson strut suspension according to claim 1, characterized in that: It also includes a magnetorheological system, comprising an electromagnetic control system and a magnetorheological fluid; the magnetorheological fluid is a damping fluid disposed within the working bar, and the electromagnetic control system alters the flowability of the magnetorheological fluid to adjust the continuous damping force of the shock absorber.

3. An inverted magnetorheological damper for MacPherson strut suspension according to claim 2, characterized in that: The electromagnetic control system includes an electromagnet core, an electromagnetic coil wound around the periphery of the electromagnet core, and an electromagnetic sleeve disposed on the outer edge. When the electromagnetic coil is energized, it generates a magnetic field, which changes the fluidity of the magnetorheological fluid, thereby adjusting the continuous damping force of the shock absorber. The electromagnet core is disposed on the piston body.

4. An inverted magnetorheological damper for MacPherson strut suspension according to claim 3, characterized in that: The electromagnetic control system also includes a wire that passes through the outer tube, the fixed end, and the piston rod, and is connected to the electromagnetic coil. The piston rod and the piston body have a through hole in the middle for the wire to pass through. The end of the wire is provided with an insulated wire terminal, which is located inside the piston body.

5. An inverted magnetorheological damper for MacPherson strut suspension according to claim 4, characterized in that: An aluminum cap is provided at the end of the piston body.

6. An inverted magnetorheological damper for MacPherson strut suspension according to claim 1, characterized in that: A floating piston is provided on the upper part of the working bar, and the upper space formed by the floating piston and the working bar is filled with high-pressure nitrogen.

7. An inverted magnetorheological damper for MacPherson strut suspension according to claim 1, characterized in that: A Teflon sleeve is also provided between the working bar and the support tube.

8. An inverted magnetorheological damper for MacPherson strut suspension according to claim 1, characterized in that: The bracket assembly includes: a cable bracket, a stabilizer bracket, and a ram's horn bracket.

9. An inverted magnetorheological damper for MacPherson strut suspension according to claim 5, characterized in that: The piston rod is provided with a guide, a protective cover, and an oil seal along its outer edge; a buffer pad is also provided between the protective cover and the piston body.

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