A shock-resistant vibration isolator

Abstract

The utility model provides an impact-resistant vibration isolator, including a shell, a bottom plate and a central axis, an upper rubber is arranged between the central axis and the shell, the central axis and the shell are arranged coaxially and the upper end of the central axis passes through the shell; the lower end of the central axis and the upper end of the lower rubber are fixed together by vulcanization, and the lower end of the lower rubber is fixed in the space surrounded by the gasket, the bottom plate and the shell; the bottom surface of the lower rubber is provided with a first concave hole, and a truncated cone-shaped cavity is provided between the lower surface of the lower rubber and the bottom plate, the first concave hole and the truncated cone-shaped cavity are connected, and the bottom plate is used to block the lower end of the shell. The vibration isolator of the utility model has an overload protection function, and the upper and lower rubbers of the vibration isolator are both made of rubber, which has a certain vibration reduction ability. At the same time, through the design of the upper and lower rubber structures, the vibration isolator has a strong impact resistance. Due to the rotating body structure of the shell interior, the central axis and the upper and lower rubbers, the horizontal stiffness and vibration reduction ability of the vibration isolator are the same.

Description

Technical Field

[0001] The utility model relates to a vibration isolator, in particular to an impact-resistant vibration isolator. Background Art

[0002] The vibration isolator is an elastic element connecting the equipment and the foundation, which is used to reduce and eliminate the vibration force transmitted from the equipment to the foundation and the vibration transmitted from the foundation to the equipment. The existing vibration isolators generally have good vibration reduction performance, but poor impact resistance and no overload protection function. When the impact force is large, the vibration isolator is easily damaged.

[0003] For applications with small vibration and large impact force, such as anti-ship missiles, underwater torpedoes and other weapons, the explosion shock waves will damage the electronic equipment on the ship and make the ship lose its combat effectiveness. The existing vibration isolators cannot meet the above application requirements.

[0004] Therefore, it is particularly important to provide a vibration isolator that has both certain vibration reduction capability and impact resistance capability. Utility Model Content

[0005] The purpose of the utility model is to overcome the deficiencies in the prior art and provide an impact-resistant vibration isolator. The vibration isolator of the utility model has an overload protection function. The upper and lower rubbers of the vibration isolator are both made of rubber, which has a certain vibration reduction capacity. Through the design of the upper and lower rubber structures, the vibration isolator has a strong impact resistance in the vertical direction. At the same time, due to the design of the rubber rotating body structure, the rigidity and vibration reduction capacity of the vibration isolator in the horizontal direction are the same.

[0006] In order to achieve the above technical objectives, the technical solution adopted by the embodiment of the utility model is:

[0007] An impact-resistant vibration isolator comprises a shell, a bottom plate and a central shaft, an upper rubber is arranged between the central shaft and the shell, the central shaft is coaxially arranged with the shell and the upper end of the central shaft passes through the shell;

[0008] The lower end of the central shaft is fixed to the upper end of the lower rubber by vulcanization, and the lower end of the lower rubber is fixed in a space enclosed by the gasket, the bottom plate and the shell;

[0009] The bottom surface of the lower rubber is provided with a first concave hole, a truncated cone-shaped cavity is provided between the lower surface of the lower rubber and the bottom plate, the first concave hole is communicated with the truncated cone-shaped cavity, and the bottom plate is used to block the lower end of the shell.

[0010] Furthermore, the upper end of the upper rubber extends to above the shell, and a nut is provided on the top of the central shaft, and the nut is located above the upper rubber.

[0011] Furthermore, the gasket is arranged along the radial direction of the shell, the gasket is located between the lower end of the central axis and the bottom plate, the upper end of the gasket is clamped on the inner wall of the shell, and the lower end is in contact with the lower rubber.

[0012] Furthermore, the lower end of the central axis has a raised portion, the raised portion is arranged perpendicular to the central axis, and the raised portion is fixed to the lower rubber by vulcanization.

[0013] Furthermore, the upper rubber and the lower rubber are symmetrically distributed relative to the axis of the central axis, and a special-shaped cavity is formed between the upper rubber, the lower rubber and the shell.

[0014] Furthermore, the central shaft and the nut, and the base plate and the shell are connected via threads.

[0015] Furthermore, a second concave hole is arranged on the upper surface of the upper rubber; and a threaded hole is arranged on the upper end of the central shaft for connecting an external device.

[0016] Furthermore, the bottom plate is provided with exhaust holes.

[0017] The beneficial effects brought by the technical solution provided by the embodiment of the utility model are:

[0018] 1. The vibration isolator of the utility model has an overload protection function, which is mainly reflected in the following two aspects:

[0019] (1) The upper end of the upper rubber extends to the top of the shell, which can prevent the top mounting plate from colliding with the shell when impacted, and can play a buffering role. In addition, the concave hole on the upper surface of the upper rubber allows the upper rubber to have a certain deformation buffer space when encountering an impact.

[0020] (2) The upper end of the lower rubber is fixed to the lower end of the central axis by vulcanization, and the lower end of the lower rubber is fixed in the space enclosed by the gasket, the bottom plate and the shell. A first concave hole is arranged on the bottom surface of the lower rubber, and a truncated cone-shaped cavity is provided between the bottom surface of the lower rubber and the bottom plate. The first concave hole is connected to the trapezoidal hole. When encountering an impact, the setting of the trapezoidal hole enables the lower rubber to have a larger buffer space. When the rubber contacts the bottom plate, the setting of the first concave hole enables the lower rubber to produce a gradual stiffness, so that the vibration isolator has an overload protection function.

[0021] 2. The vibration isolator of the utility model is provided with upper and lower rubbers, which have a certain vibration reduction capacity. At the same time, through the design of the upper and lower rubber structures, the vibration isolator has a strong impact resistance in the vertical direction. At the same time, due to the design of the rubber rotating body structure, the vibration isolator has the same stiffness and vibration reduction capacity in the horizontal direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1It is a schematic structural diagram of an impact-resistant vibration isolator in an embodiment of the utility model.

[0023] Figure 2 yes Figure 1 Top view of the middle isolator.

[0024] Figure 3 yes Figure 2 BB cross-sectional view of the middle vibration isolator.

[0025] Explanation of the reference numerals: 1-shell; 2-bottom plate; 3-center axis; 4-upper rubber; 5-lower rubber; 6-gasket; 7-first recessed hole; 8-truncated cone-shaped cavity; 9-nut; 10-raised portion; 11-special-shaped cavity; 12-second recessed hole; 13-threaded hole; 14-mounting hole. DETAILED DESCRIPTION

[0026] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "inside, outside", "up, down", "left, right", etc. are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise stated, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention.

[0027] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0028] Example 1

[0029] like Figure 1-3 As shown, an impact-resistant vibration isolator comprises a shell 1, a bottom plate 2 and a central shaft 3, an upper rubber 4 is arranged between the central shaft 3 and the shell 1, the central shaft 3 is coaxially arranged with the shell 1 and the upper end of the central shaft 3 passes through the shell 1;

[0030] The lower end of the central shaft 3 is fixed to the upper end of the lower rubber 5 by vulcanization, and the lower end of the lower rubber 5 is fixed in the space enclosed by the gasket 6, the bottom plate 2 and the housing 1;

[0031] The bottom surface of the lower rubber 5 is provided with a first concave hole 7, and a truncated cone-shaped cavity 8 is provided between the lower surface of the lower rubber 5 and the bottom plate 2. The first concave hole 7 is connected to the truncated cone-shaped cavity 8, and the bottom plate 2 is used to block the lower end of the housing 1. The bottom plate 2 is provided with an exhaust hole.

[0032] Specifically, the shell 1 includes an integrally formed upper half and lower half, the upper half is a cylindrical structure, the lower half is a flat plate structure, the lower half is arranged on the outer periphery of the bottom of the upper half, and the lower half is provided with a mounting hole 14 for connecting the shell 1 with other components.

[0033] The upper end of the upper rubber 4 extends to the upper part of the housing 1 . A nut 9 is provided on the top of the central shaft 3 . The nut 9 is located above the upper rubber 4 .

[0034] The gasket 6 is arranged along the radial direction of the housing 1 . The gasket 6 is located between the lower end of the central shaft 3 and the bottom plate 2 . The upper end of the gasket 6 is stuck on the inner wall of the housing 1 , and the lower end is in contact with the lower rubber 5 .

[0035] Specifically, the inner wall of the upper half of the shell 1 is a variable diameter structure, with a small inner diameter at the upper part and a large inner diameter at the lower part. The gasket 6 is arranged at the variable diameter position. The variable diameter structure enables the upper surface of the gasket 6 to contact the upper part with a small inner diameter, thereby playing a positioning role.

[0036] The lower end of the central axis 3 has a raised portion 10 , which is arranged perpendicular to the central axis 3 , and is fixed to the lower rubber 5 by vulcanization.

[0037] The setting of the raised portion 10 can increase the contact area between the lower rubber 5 and the central axis 3, thereby increasing the bonding strength between the lower rubber 5 and the central axis, and when the central axis 3 is impacted in the vertical direction, the impact force can be evenly dispersed in the lower rubber 5 to avoid local force damage to the lower rubber 5.

[0038] The upper rubber 4 and the lower rubber 5 are symmetrically distributed with respect to the axis of the central axis 3, and a special-shaped cavity 11 is formed between the upper rubber 4, the lower rubber 5 and the housing 1. There is a certain gap between the lower surface of the upper rubber 4 and the upper surface of the lower rubber 5, that is, the upper rubber 4 and the lower rubber 5 are not in direct contact, so that when the central axis 3 is impacted in the vertical direction, there is a certain buffer space between the upper rubber 4 and the lower rubber 5.

[0039] The upper rubber 4 and the lower rubber 5 are both made of rubber.

[0040] The central shaft 3 and the nut 9 as well as the base plate 2 and the housing 1 are connected via threads.

[0041] A second concave hole 12 is provided on the upper surface of the upper rubber 4 ; a threaded hole 13 is provided on the upper end of the central shaft 3 for connecting with external equipment.

[0042] When the central axis 3 is impacted in the horizontal direction, the central axis 3 will move to one side along the impact force direction. The provision of the second concave hole 12 and the special-shaped cavity 11 can increase the horizontal stiffness and vibration reduction capability of the vibration isolator.

[0043] Finally, it should be noted that the above specific implementation methods are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to examples, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. An impact-resistant vibration isolator, characterized in that: It comprises a shell (1), a bottom plate (2) and a central shaft (3), an upper rubber (4) being arranged between the central shaft (3) and the shell (1), the central shaft (3) being arranged coaxially with the shell (1) and the upper end of the central shaft (3) passing through the shell (1); The lower end of the central shaft (3) is fixed to the upper end of the lower rubber (5) by vulcanization, and the lower end of the lower rubber (5) is fixed in a space enclosed by the gasket (6), the bottom plate (2) and the housing (1); The bottom surface of the lower rubber (5) is provided with a first concave hole (7), a truncated cone-shaped cavity (8) is provided between the lower surface of the lower rubber (5) and the bottom plate (2), the first concave hole (7) is connected to the truncated cone-shaped cavity (8), and the bottom plate (2) is used to block the lower end of the shell (1).

2. The shock-resistant vibration isolator according to claim 1, characterized in that: The upper end of the upper rubber (4) extends to the top of the housing (1), and a nut (9) is provided on the top of the central shaft (3), and the nut (9) is located above the upper rubber (4).

3. The shock-resistant vibration isolator according to claim 1, characterized in that: The gasket (6) is arranged along the radial direction of the shell (1), and is located between the lower end of the central shaft (3) and the bottom plate (2). The upper end of the gasket (6) is clamped on the inner wall of the shell (1), and the lower end is in contact with the lower rubber (5).

4. The shock-resistant vibration isolator according to claim 1, characterized in that: The lower end of the central axis (3) has a raised portion (10), the raised portion (10) is arranged perpendicular to the central axis (3), and the raised portion (10) is fixed to the lower rubber (5) by vulcanization.

5. The shock-resistant vibration isolator according to claim 1, characterized in that: The upper rubber (4) and the lower rubber (5) are symmetrically distributed relative to the axis of the central axis (3), and a special-shaped cavity (11) is formed between the upper rubber (4), the lower rubber (5) and the shell (1).

6. The shock-resistant vibration isolator according to claim 2, characterized in that: The central shaft (3) and the nut (9), and the base plate (2) and the housing (1) are connected via threads.

7. The shock-resistant vibration isolator according to claim 1, characterized in that: The upper surface of the upper rubber (4) is provided with a second concave hole (12); A threaded hole (13) is provided at the upper end of the central shaft (3) for connecting to external equipment.

8. The shock-resistant vibration isolator according to claim 1, characterized in that: The bottom plate (2) is provided with an exhaust hole.

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