Guide structure and magnetorheological damper with same

Abstract

The utility model discloses a guiding structure and a magneto-rheological damper with the guiding structure, and relates to the technical field of guiding structures, the guiding structure comprises a guiding sleeve, a dustproof sealing ring, a guiding bearing, a buffering sealing ring and a static sealing ring, a dustproof sealing ring is arranged at the outer end of an inner hole of the guide sleeve, a buffering sealing ring is arranged at the inner end of the inner hole of the guide sleeve, the inner diameters of the dustproof sealing ring and the buffering sealing ring are matched with the piston rod, a static sealing ring is arranged between the guide sleeve and a cylinder body of the piston cylinder, and a guide bearing is arranged on the inner side of the buffering sealing ring. The buffering sealing ring can prevent iron powder particles from entering the guide sleeve, abrasive particle abrasion to the guide bearing is prevented, the service life of the guide sleeve and the service life of the guide bearing are prolonged, the sealing reliability is improved through two-end sealing, and friction force between the guide sleeve and the piston rod is reduced; assembly operation is simple, the device is suitable for automatic assembly production, the structure is simple, parts are few, and the production cost can be greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of guide structures, in particular to a guide structure and a magnetorheological damper with the guide structure. Background Art

[0002] Magnetorheological dampers are intelligent dampers with rapidly adjustable damping, utilizing the rheological effect of magnetorheological fluid in a magnetic field. They hold great promise for vibration and motion control in active applications such as vehicles, civil engineering, medical devices, and robotics. Based on magnetorheological technology, magnetorheological dampers feature a simple structure, continuous damping force that is adjustable in both forward and reverse directions, a wide adjustable damping range, fast response, excellent stability, and compatibility with microcomputer control. Consequently, magnetorheological dampers have attracted widespread attention from researchers worldwide in semi-active suspension applications.

[0003] The cylinder of the magnetorheological damper is filled with magnetorheological fluid, and the piston slides inside the cylinder and is connected to an external mechanism through a piston rod, transmitting the damping force to the external mechanism. The piston rod of the magnetorheological damper needs a guide to guide and seal the movement of the piston rod when entering and exiting the cylinder. The magnetorheological fluid filled in the magnetorheological damper contains micron-sized iron powder, which poses a great challenge to the sealing and wear resistance of the guide. The reliable operation of the magnetorheological damper requires a guide structure to seal and guide the piston rod. If only one seal is provided, the service life of the guide bearing will be affected, and once the only seal fails, the damper will fail. Utility Model Content

[0004] The purpose of the utility model is to provide a guide structure and a magnetorheological damper with a guide structure, so as to solve the problems existing in the above-mentioned prior art and improve the sealing and wear resistance of the guide sleeve.

[0005] To achieve the above purpose, the present invention provides the following solutions:

[0006] The utility model provides a guide structure and a magnetorheological damper with a guide structure, comprising a guide sleeve, a dustproof sealing ring, a guide bearing, a buffer sealing ring and a static sealing ring. The guide sleeve is used to be sleeved on a piston rod in a piston cylinder. The outer end of the inner hole of the guide sleeve is provided with the dustproof sealing ring, and the inner end is provided with the buffer sealing ring. The inner diameters of the dustproof sealing ring and the buffer sealing ring are matched with the piston rod. The static sealing ring is provided between the guide sleeve and the cylinder body of the piston cylinder, and the guide bearing is provided on the inner side of the buffer sealing ring.

[0007] Preferably, a riveting slot is provided in the middle of the outer surface of the guide sleeve, and the riveting slot is used for riveting connection with the cylinder body.

[0008] Preferably, the outer end of the guide sleeve is provided with a dustproof sealing groove, the dustproof sealing ring is clamped in the dustproof sealing groove, and the outer end of the dustproof sealing ring is flush with the outer end surface of the guide sleeve.

[0009] Preferably, a circular mounting seat is provided in the dustproof sealing groove, the inner ring of the mounting seat is provided with the dustproof sealing ring, the top surface is connected to the outer end surface of the guide sleeve by punching and riveting, and the outer end surface of the mounting seat is flush with the outer end surface of the guide sleeve.

[0010] Preferably, a circular mounting seat is provided in the dustproof sealing groove, the dustproof sealing ring is provided between the inner ring of the mounting seat and the bottom surface of the dustproof sealing groove, the outer ring is sealed and connected to the dustproof sealing groove through an O-ring, and the outer end surface of the mounting seat is flush with the outer end surface of the guide sleeve; the dustproof sealing ring is an H-shaped sealing ring.

[0011] Preferably, the dustproof sealing groove is a three-stage stepped groove, the dustproof sealing ring is clamped in the middle groove of the stepped groove, and a pressure ring is clamped in the large groove at the end. The outer end face of the pressure ring is connected to the outer end face of the guide sleeve by punching and riveting, and the inner end face is clamped to the dustproof sealing ring; the dustproof sealing ring is an H-shaped sealing ring.

[0012] Preferably, a retaining spring is provided between the outer end of the guide sleeve and the cylinder body.

[0013] Preferably, a main sealing ring is clamped in the middle of the guide sleeve.

[0014] Preferably, the main sealing ring and the buffer sealing ring are both Y-shaped sealing rings, and the opening of the Y-shaped sealing ring faces the inner end surface of the guide sleeve.

[0015] Preferably, an oil storage tank is provided in the middle of the guide sleeve, the oil storage tank is at least 1 mm deep, and a guide bearing is provided between the oil storage tank and the buffer sealing ring; or the guide bearing is provided between the oil storage tank and the main sealing ring.

[0016] Preferably, the static sealing ring is an O-ring and is respectively provided at both ends of the guide sleeve.

[0017] The utility model also relates to a magnetorheological damper with a guide structure, comprising the above-mentioned guide structure and a magnetorheological damper body, the piston rod of the magnetorheological damper body passing through the inner hole of the guide structure, the side wall of the guide structure being riveted to the cylinder body of the magnetorheological damper body, and a retaining spring being provided between the end and the cylinder body.

[0018] Compared with the prior art, the utility model has achieved the following technical effects:

[0019] The utility model discloses a buffer sealing ring can block iron powder particles from entering the guide sleeve, prevents abrasive wear on the guide bearing, and increases the service life of the guide sleeve and the guide bearing. The seals at both ends improve the reliability of the seal and reduce the friction between the guide sleeve and the piston rod. The utility model has simple assembly operation and is suitable for automated assembly production. The utility model has a simple structure and few parts, which can greatly reduce the production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 This is a structural diagram of the guide structure in Example 1 of the present utility model;

[0022] Figure 2 This is a structural diagram of the guide structure in Example 1 of the present utility model;

[0023] Figure 3 This is a schematic structural diagram of the guide sleeve in Example 1 of the present utility model;

[0024] Figure 4 This is a structural diagram of the guide structure in the second embodiment of the present utility model;

[0025] Figure 5 This is a structural diagram of the guide structure in the third embodiment of the present utility model;

[0026] Figure 6 This is a structural diagram of the guide structure in the fourth embodiment of the present utility model;

[0027] Figure 7 This is a schematic structural diagram of a magnetorheological damper with a guide structure in a fifth embodiment of the present invention;

[0028] In the figure: 1-guide sleeve, 2-dustproof sealing ring, 3-main sealing ring, 4-guide bearing, 5-buffer sealing ring, 6-O-ring, 7-oil storage tank, 8-mounting seat, 9-H-type sealing ring, 10-circlip, 11-rivet slot, 12-pressure ring, 13-punch rivet slot, 14-piston rod, 15-cylinder body. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] The purpose of the utility model is to provide a guide structure and a magnetorheological damper with the guide structure, so as to solve the problems existing in the prior art and improve the sealing and wear resistance of the guide sleeve.

[0031] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0032] Example 1

[0033] like Figures 1 to 3 As shown, this embodiment provides a guide structure including a guide sleeve 1, a dustproof seal 2, a guide bearing 4, a buffer seal 5, and a static seal. The guide sleeve 1 is used to be mounted on a piston rod 14 in a piston cylinder. The outer end of the inner hole of the guide sleeve 1 is provided with a dustproof seal 2, and the inner end is provided with a buffer seal 5. The inner diameters of the dustproof seal 2 and the buffer seal 5 match those of the piston rod 14. A static seal is provided between the guide sleeve 1 and the cylinder body 15 of the piston cylinder, and a guide bearing 4 is provided inside the buffer seal 5. Seals are provided at both ends of the guide sleeve 1, ensuring reliable sealing and reducing friction between the guide sleeve 1 and the piston rod 14.

[0034] As an optional solution, in this embodiment, a riveting groove 11 is provided in the middle of the outer surface of the guide sleeve 1 , and the riveting groove 11 is used for riveting connection with the cylinder body 15 .

[0035] As an optional solution, in this embodiment, a dustproof sealing groove is provided at the outer end of the guide sleeve 1, and the dustproof sealing ring 2 is clamped in the dustproof sealing groove. The outer end of the dustproof sealing ring 2 is flush with the outer end surface of the guide sleeve 1 (the upper end shown in the figure).

[0036] As an optional solution, in this embodiment, an annular mounting seat 8 is provided in the dust seal groove. The inner ring of the mounting seat 8 is provided with a dust seal ring 2. The top surface is connected to the outer end surface of the guide sleeve 1 by punching and riveting. The outer end surface of the mounting seat 8 is preferably flush with the outer end surface of the guide sleeve 1 to achieve a neat and beautiful appearance. In this embodiment, the punching and riveting connection can fix the mounting seat 8 and limit its axial movement, facilitating mass production. Alternatively, a countersunk bolt or other method can be used for connection and fixation.

[0037] As an optional solution, in this embodiment, a retaining spring 10 is provided between the outer end of the guide sleeve 1 and the cylinder body 15 , and the retaining spring 10 is snapped into the retaining groove of the cylinder body 15 to prevent the guide sleeve 1 from falling off.

[0038] As an optional solution, in this embodiment, a main sealing ring 3 is clamped in the middle of the guide sleeve 1. The main seal serves as a second seal, further improving the sealing effect and sealing reliability.

[0039] As an optional solution, in this embodiment, both the main seal ring 3 and the buffer seal ring 5 are Y-shaped seal rings, with the opening of the Y-shaped seal ring facing the inner end surface (the lower end in the figure) of the guide sleeve 1. The buffer seal ring 5 can prevent iron powder particles from entering the guide sleeve 1, preventing abrasive wear on the guide bearing 4 and extending the service life of the guide sleeve 1.

[0040] As an optional solution, in this embodiment, an oil reservoir 7 is provided in the middle of the guide sleeve 1. The oil reservoir 7 is at least 1 mm deep, and a guide bearing 4 is provided between the oil reservoir 7 and the buffer seal 5. The lubricating oil in the oil reservoir fully lubricates the main seal 3, reducing the friction between the guide sleeve 1 and the piston rod 14.

[0041] As an optional solution, the static sealing ring in this embodiment is an O-ring 6 and is respectively provided at both ends of the guide sleeve 1 , or may be other types of static sealing rings.

[0042] The guide structure in this embodiment improves the sealing and lubrication effects of the guide structure and the service life of the magnetorheological damper; the assembly operation is simple and suitable for automated assembly production; the structure is simpler and has fewer parts, and it can be assembled and produced automatically, which can greatly reduce production costs and improve production efficiency and product consistency.

[0043] Example 2

[0044] like Figure 4 As shown, the difference between the structure of this embodiment and that of the first embodiment is that a guide bearing 4 is provided between the oil reservoir 7 and the main sealing ring 3. The positions of the oil reservoir 7 and the guide bearing 4 are interchangeable.

[0045] Example 3

[0046] like Figure 5 As shown, the difference between the structure of this embodiment and that of embodiment 1 is that a circular mounting seat 8 is provided in the dust seal groove, a dust seal ring 2 is provided between the inner ring of the mounting seat 8 and the bottom surface of the dust seal groove, and the outer ring is sealed to the dust seal groove through an O-ring 6. The outer end surface of the mounting seat 8 is preferably flush with the outer end surface of the guide sleeve 1, so that the appearance is neat and beautiful; the dust seal ring 2 is an H-type sealing ring 9, and the H-type sealing ring 9 is a bidirectional sealing ring with an H-shaped cross section.

[0047] When the installation space of the guide structure is limited, the main sealing ring 3 and the dustproof sealing ring 2 can be replaced by a dustproof lip seal of an H-shaped sealing ring 9.

[0048] Example 4

[0049] like Figure 6 As shown, the difference between the structure of this embodiment and that of embodiment 1 is that the dustproof sealing groove is a three-section stepped groove, a dustproof sealing ring 2 is clamped in the middle groove of the stepped groove, a pressure ring 12 is clamped in the large groove at the end, and the outer end face of the pressure ring 12 can preferably be connected to the outer end face of the guide sleeve 1 by punching and riveting and be flush (the processing technology is simple, the appearance is neat and beautiful), and the inner end face is clamped with the dustproof sealing ring 2; the dustproof sealing ring 2 is an H-type sealing ring 9, and the H-type sealing ring 9 is a bidirectional sealing ring with an H-shaped cross section.

[0050] When the installation space of the guide structure is limited, the main sealing ring 3 and the dustproof sealing ring 2 can be replaced by a dustproof lip seal of an H-shaped sealing ring 9.

[0051] Example 5

[0052] like Figure 7 As shown, this embodiment provides a magnetorheological damper with a guide structure, including the above-mentioned guide structure and a magnetorheological damper body, the piston rod 14 of the magnetorheological damper body passes through the inner hole of the guide structure, the side wall of the guide structure is riveted to the cylinder body 15 of the magnetorheological damper body, and a retaining spring 10 is arranged between the end and the cylinder body 15.

[0053] When assembling the guide sleeve 1 and the piston rod 14, first inject lubricating oil into the oil storage ring groove of the guide sleeve 1. When the piston rod 14 moves, the main seal can be lubricated to reduce friction. After the guide sleeve 1 and the internal components such as the piston and the piston rod 14 are installed in the cylinder body 15, the retaining ring 10 on the shoulder of the guide sleeve 1 is inserted into the retaining groove of the cylinder body 15 to prevent the guide sleeve 1 from falling off. Then, several spot rivets or full-circle ring groove press rivets are performed on the outer wall of the cylinder body 15 corresponding to the riveting retaining groove 11 of the guide sleeve 1, and the installation is completed.

[0054] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. At the same time, those skilled in the art will find that the specific implementation methods and application scopes may vary based on the concept of the present invention. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims

1. A guide structure, characterized in that: It includes a guide sleeve, a dustproof sealing ring, a guide bearing, a buffer sealing ring and a static sealing ring. The guide sleeve is used to be sleeved on a piston rod in a piston cylinder. The outer end of the inner hole of the guide sleeve is provided with the dustproof sealing ring, and the inner end is provided with the buffer sealing ring. The inner diameters of the dustproof sealing ring and the buffer sealing ring are matched with the piston rod. The static sealing ring is provided between the guide sleeve and the cylinder body of the piston cylinder, and the guide bearing is provided on the inner side of the buffer sealing ring.

2. The guide structure according to claim 1, characterized in that: A riveting slot is provided in the middle of the outer surface of the guide sleeve, and the riveting slot is used for riveting connection with the cylinder body.

3. The guide structure according to claim 1, wherein: The outer end of the guide sleeve is provided with a dustproof sealing groove, and the dustproof sealing ring is clamped in the dustproof sealing groove.

4. The guide structure according to claim 3, characterized in that: An annular mounting seat is provided in the dustproof sealing groove, the inner ring of the mounting seat is provided with the dustproof sealing ring, and the top surface is connected to the outer end surface of the guide sleeve by punching and riveting.

5. The guide structure according to claim 3, characterized in that: A circular mounting seat is provided in the dust seal groove, the dust seal ring is provided between the inner ring of the mounting seat and the bottom surface of the dust seal groove, the outer ring is sealed and connected to the dust seal groove through an O-ring, and the outer end surface of the mounting seat is flush with the outer end surface of the guide sleeve; the dust seal ring is an H-shaped seal ring.

6. The guide structure according to claim 3, characterized in that: The dustproof sealing groove is a three-stage stepped groove, the dustproof sealing ring is clamped in the middle groove of the stepped groove, and a pressure ring is clamped in the large groove at the end. The outer end face of the pressure ring is connected to the outer end face of the guide sleeve by punching and riveting, and the inner end face is clamped to the dustproof sealing ring; the dustproof sealing ring is an H-shaped sealing ring.

7. The guide structure according to claim 1, characterized in that: A retaining spring is provided between the outer end of the guide sleeve and the cylinder body.

8. The guide structure according to claim 1, wherein: A main sealing ring is clamped in the middle of the guide sleeve; the main sealing ring and the buffer sealing ring are both Y-shaped sealing rings, and the opening of the Y-shaped sealing ring faces the inner end surface of the guide sleeve.

9. The guide structure according to claim 8, characterized in that: An oil storage tank is provided in the middle of the guide sleeve, and the oil storage tank is at least 1 mm deep. The guide bearing is provided between the oil storage tank and the buffer sealing ring, or the guide bearing is provided between the oil storage tank and the main sealing ring; the static sealing ring is an O-ring and is respectively provided at both ends of the guide sleeve.

10. A magnetorheological damper with a guide structure, characterized in that: It comprises the guide structure and magnetorheological damper body described in any one of claims 1 to 9, the piston rod of the magnetorheological damper body passes through the inner hole of the guide structure, the side wall of the guide structure is riveted to the cylinder body of the magnetorheological damper body, and a retaining spring is provided between the end and the cylinder body.

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