Silicone oil shock absorber

Abstract

The utility model relates to a shock absorber, in particular to a silicone oil shock absorber, which is characterized in that a through columnar hole cavity is arranged on a base of a shell of the silicone oil shock absorber. The central shaft is disposed in the bore and is coaxial with the bore. The two rubber discs are arranged in the hole cavity and located at the two axial ends of the hole cavity, the outer circumferences of the rubber discs are sealed and fixedly connected with the inner wall face of the hole cavity, the center portions of the rubber discs are sealed and fixedly connected with the center shaft, and at least one end of the center shaft protrudes to the axial outer side of the corresponding rubber disc. The damping disc is located in the hole cavity and located between the two rubber discs, the damping disc and the center shaft are coaxially arranged, and the center shaft is fixedly connected. And silicone oil is filled in a cavity, between the two rubber discs, of the hole cavity. The silicone oil shock absorber can conduct shock absorption in the axial direction of the center shaft and in the direction perpendicular to the axial direction.

Description

Technical Field

[0001] This utility model relates to a vibration damper, and more specifically, to a silicone oil vibration damper. Background Technology

[0002] Silicone oil vibration dampers are widely used in the construction machinery industry for vibration reduction in engines, transmissions, and cabs. Chinese patent document CN 201757150U discloses a silicone oil vibration damper, whose main structure includes rubber filled within a housing, a central shaft fixed within the rubber, and a damping disc central shaft fixed to the end of the central shaft located within a closed cavity. The filled rubber and the housing are fixedly connected by vulcanization, forming a closed cavity within the housing, which is filled with damping silicone oil. When the central shaft vibrates up and down under the action of the supported components, the damping disc moves up and down within the silicone oil to absorb the vibration.

[0003] The silicone oil vibration damper with the above structure is mainly used to effectively dampen vibrations in the Z direction, which is consistent with the axial direction of the central axis. However, its vibration isolation effect is not good for vibrations in the X and Y directions, which are perpendicular to the axial direction of the central axis. When this type of vibration damper is used, the center of gravity is arranged in a vertical position. Therefore, this silicone oil vibration damper mainly isolates vibrations in the vertical direction, and its vibration isolation effect in the horizontal direction is not good. Utility Model Content

[0004] The technical problem to be solved by this utility model is the shortcoming of the existing silicone oil vibration damper in unidirectional vibration reduction, and a silicone oil vibration damper is provided to achieve vibration reduction in multiple dimensions.

[0005] The technical solution of this utility model to achieve its purpose is: a silicone oil vibration damper, comprising:

[0006] The outer casing base has a through cylindrical cavity.

[0007] A central shaft is arranged in the cavity and is coaxial with the cavity;

[0008] Two rubber discs are arranged in the cavity and located at both ends of the cavity along the axial direction. The outer circumference of the rubber discs is sealed and fixedly connected to the inner wall of the cavity, and the central part of the rubber discs is sealed and fixedly connected to the central shaft. At least one end of the central shaft protrudes to the outside of the corresponding rubber disc.

[0009] A damping disc is located in the cavity and between the two rubber discs, and is coaxially arranged with and fixedly connected to the central shaft.

[0010] The cavity located between the two rubber discs is filled with silicone oil.

[0011] In this utility model of a silicone oil vibration damper, the damping disc includes a damping cylinder and a damping disk located within the damping cylinder, the damping disk being coaxially arranged with the damping cylinder; the damping disk is fixedly connected to the central shaft at its center, and the damping disk is fixedly connected to the damping cylinder at its outer circumference. The damping disk and the damping cylinder can be connected by an interference fit, welding, or as an integral structure. The damping disk and the central shaft are connected by welding or threaded connection.

[0012] In this utility model of silicone oil vibration damper, the damping disk is provided with a plurality of axially penetrating axial damping holes; the damping cylinder is provided with a plurality of radially penetrating radial damping holes.

[0013] In this novel silicone oil vibration damper, the central shaft is tubular, with both ends extending axially to the outer sides of the corresponding rubber disc. The inner hole of the central shaft can be a smooth hole for bolts to pass through, facilitating the installation of the silicone oil vibration damper; alternatively, the inner hole can be a threaded hole for connection with the threads on the bolts.

[0014] In this novel silicone oil vibration damper, the section where the inner wall of the cavity connects with the rubber disc is stepped. The outer casing base and the rubber disc can be connected by an interference fit or by vulcanization. The stepped design at both ends of the inner wall of the cavity enhances the connection strength between the outer casing base and the rubber disc.

[0015] In this novel silicone oil vibration damper, the diameter of the outer section of the connecting part between the inner wall of the cavity and the rubber disc is smaller than the diameter of the inner section.

[0016] In this novel silicone oil vibration damper, the thickness of the rubber disc in the axial direction increases sequentially from the outer circumference to the center.

[0017] In this utility model of silicone oil vibration damper, the upper part of the outer shell base is arched, and the top of it is provided with an exhaust hole that communicates with the cavity. An air nozzle or a screw plug is installed in the exhaust hole.

[0018] In this utility model of silicone oil vibration damper, the outer shell base is further provided with an oil filling hole communicating with the cavity, and a screw plug is installed in the oil filling hole. The amount of silicone oil filling in the cavity is adjusted by increasing or decreasing the oil filling hole.

[0019] Compared with the prior art, the silicone oil vibration damper of this invention can reduce vibration in the axial direction of the central shaft and in the direction perpendicular to the axial direction. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the silicone oil vibration damper of this utility model.

[0021] Figure 2This is a cross-sectional schematic diagram of the silicone oil vibration damper of this utility model.

[0022] Figure 3 This is a schematic diagram of the outer shell base in the silicone oil vibration damper of this utility model.

[0023] Figure 4 This is a schematic diagram of the structure of the rubber disc in the silicone oil vibration damper of this utility model.

[0024] Figure 5 This is a schematic diagram of the combined structure of the damping disc and the central shaft in the silicone oil vibration damper of this utility model.

[0025] Figure 6 This is a schematic diagram of the damping disc in the silicone oil vibration damper of this utility model.

[0026] Component names and serial numbers in the diagram:

[0027] 10. Outer shell base, 11. Oil filling hole, 12. Oil hole plug, 13. Vent hole, 14. Air hole plug, 15. Mounting hole, 16. Hole, 17. Large diameter section, 18. Small diameter section.

[0028] Central axis 20.

[0029] Rubber disc 30.

[0030] Damping disc 40, damping disc 41, axial damping hole 42, damping cylinder 43, radial damping hole 44.

[0031] Silicone oil 50. Detailed Implementation

[0032] The specific implementation plan is described below with reference to the attached diagram.

[0033] like Figures 1 to 6 As shown, the silicone oil vibration damper includes: a housing base 10, a central shaft 20, two rubber discs 30, and a damping disc 40. The housing base 10 has a through cylindrical cavity 16. The central shaft 20 is arranged in the cavity 16 and is coaxial with the cavity 16. The two rubber discs 30 are arranged in the cavity 16 and located at both axial ends of the cavity 16. The outer circumference of the rubber discs 30 is sealed and fixedly connected to the inner wall of the cavity 16, and the central portion of the rubber discs 30 is sealed and fixedly connected to the central shaft 20. At least one end of the central shaft 20 protrudes to the axial outer side of the corresponding rubber disc 30.

[0034] The damping disc 40 is located in the cavity 16 and between the two rubber discs 30, and is arranged coaxially with the central shaft 20 and fixedly connected to it; the cavity 16 located between the two rubber discs 30 is filled with silicone oil 50.

[0035] Optionally, the upper part of the housing base 10 is arched, and its bottom protrudes to both sides to form a mounting part. Mounting holes 15 are provided on the mounting part, and bolts are installed in the mounting holes 15 to fix the housing base 10 to the vehicle frame. After the housing base 10 is installed, the axis of the cavity 16 is arranged horizontally.

[0036] like Figure 3 As shown, the top of the housing base 10 is provided with an exhaust port 13 communicating with the cavity 16, and an air vent plug 14 is installed in the exhaust port 13. The silicone oil vibration damper can remove excess air from the cavity 16 or replenish silicone oil in the cavity 16 by removing the air vent plug 14. When the exhaust port 13 is only used for venting, an air nozzle can also be installed in the exhaust port 13. Optionally, an oil replenishment port 11 communicating with the cavity 16 can also be provided on the housing base 10, and a plug is installed in the oil replenishment port 11. The amount of silicone oil filling in the cavity 16 can be adjusted by increasing or decreasing the oil replenishment port 11. The oil replenishment port 11 can be located at the lower part of the housing base 10 for easy oil draining from the cavity.

[0037] Optionally, the section of the inner wall of the cavity 16 that mates with the rubber disc 30 is stepped, such as... Figure 2 As shown, the two ends of the cavity 16 are stepped, with the smaller diameter segment 18 located outside the larger diameter segment 17. The outer shell base 10 and the rubber disc 30 can be connected by an interference fit or by vulcanization. The stepped shape at both ends of the inner wall of the cavity 16 can enhance the connection strength between the outer shell base 10 and the rubber disc 30.

[0038] Optionally, such as Figure 2 As shown, the thickness of the rubber disc 30 increases gradually from the outer circumference to the center in the axial direction. The central shaft 20 is tubular, with both ends extending to the axial outer sides of the corresponding rubber disc 30. The inner hole of the central shaft 20 can be a smooth hole for bolts to pass through, or it can be a threaded hole for connection with the threads on the bolts. In some embodiments, the central shaft 20 can also be a solid screw, with external threads at one or both ends to mate with a nut and connect to the damped component.

[0039] Optionally, such as Figure 5As shown, the damping disk 40 includes a damping cylinder 43 and a damping disk 41 located within the damping cylinder 43. The damping disk 41 and the damping cylinder 43 are arranged coaxially. The damping disk 41 is fixedly connected to the central shaft 20 at its center and to the damping cylinder 43 at its outer circumference. The damping disk 41 and the damping cylinder 43 can be connected by an interference fit, welding, or as a single unit. The damping disk 41 and the central shaft 20 are connected by welding or threaded connection. Furthermore, the damping disk 41 is provided with a plurality of axially penetrating axial damping holes 42; the damping cylinder 43 is provided with a plurality of radially penetrating radial damping holes 44. The radial damping holes 44 and the axial damping holes 42 are evenly distributed circumferentially around the center of the damping disk 40 on the damping disk 41 and the damping cylinder 43, respectively.

[0040] In this embodiment, the axial static stiffness of the silicone oil vibration damper rubber is 2000-4000 N / mm, and the radial static stiffness is 1-1.3 times that of the axial stiffness. The axial dynamic stiffness is 450 N / mm, and the radial dynamic stiffness is 1.1-1.5 times that of the axial stiffness. This silicone oil vibration damper can reduce vibration in the axial direction (Z-axis direction) of the central shaft and in directions perpendicular to the axial direction (X-axis direction and Y-axis direction).

Claims

1. A silicone oil vibration damper, characterized in that, include: The outer casing base has a through cylindrical cavity. A central shaft is arranged in the cavity and is coaxial with the cavity; Two rubber discs are arranged in the cavity and located at both ends of the cavity along the axial direction. The outer circumference of the rubber discs is sealed and fixedly connected to the inner wall of the cavity, and the central part of the rubber discs is sealed and fixedly connected to the central shaft. At least one end of the central shaft protrudes to the outside of the corresponding rubber disc. A damping disc is located in the cavity and between the two rubber discs, and is coaxially arranged with and fixedly connected to the central shaft. The cavity located between the two rubber discs is filled with silicone oil.

2. The silicone oil vibration damper according to claim 1, characterized in that, The damping disk includes a damping cylinder and a damping disk located in the damping cylinder, the damping disk being arranged coaxially with the damping cylinder; the damping disk is fixedly connected to the central axis at its center, and the damping disk is fixedly connected to the damping cylinder at its outer circumference.

3. The silicone oil vibration damper according to claim 2, characterized in that, The damping disk is provided with multiple axially penetrating axial damping holes.

4. The silicone oil vibration damper according to claim 2, characterized in that, The damping cylinder is provided with multiple radially penetrating radial damping holes.

5. The silicone oil vibration damper according to any one of claims 1 to 4, characterized in that, The central shaft is tubular, with both ends extending to the outer side of the corresponding rubber disc.

6. The silicone oil vibration damper according to claim 1, characterized in that, The section of the inner wall of the cavity that connects with the rubber disc is stepped.

7. The silicone oil vibration damper according to claim 6, characterized in that, The diameter of the outer section of the part connecting the inner wall of the cavity to the rubber disc is smaller than the diameter of the inner section.

8. The silicone oil vibration damper according to claim 7, characterized in that, The thickness of the rubber disc in the axial direction increases sequentially from the outer circumference to the center.

9. The silicone oil vibration damper according to claim 1, characterized in that, The upper part of the outer casing base is arched, and the top of it is provided with an exhaust hole that communicates with the cavity. An air nozzle or a screw plug is installed in the exhaust hole.

10. The silicone oil vibration damper according to claim 1 or 9, characterized in that, The outer casing base is also provided with an oil filling hole that communicates with the cavity, and a screw plug is installed in the oil filling hole.

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