Lightweight shock absorber

Abstract

The utility model discloses a light-weight shock absorber, and belongs to the technical field of shock absorbers. The two ends of the support are provided with bent parts, and an installation cavity is formed in each bent part; the two ends of the central shaft are provided with step structures; the step structure correspondingly penetrates through the mounting cavity and is positioned on the bracket through the positioning assembly; the vibration isolation pieces are correspondingly arranged in all the sets of mounting cavities and arranged on the step structures in a sleeving mode; the ball joint is mounted on the central shaft in a sliding manner; the connecting end of the ball joint has bending dependent variable. According to the structural analysis, the positioning assembly and the support are simplified, and the overall weight is reduced. And meanwhile, the performance is improved, for example, the tightening amount is controlled through an adjusting nut in the positioning assembly, so that adjustment of different rigidity requirements is achieved. An elastic vibration isolation piece net pad is adopted, and hard limiting in the prior art is replaced with flexible applicability limiting. The connecting end of the ball joint has bending dependent variable, so that the displacement required by bending is met, the bending stress is improved, and the service life is prolonged.

Description

Technical Field

[0001] The invention belongs to the technical field of shock absorbers, and in particular relates to a lightweight shock absorber. Background Art

[0002] In order to meet the technical requirements of rotational decoupling and limit angle control of existing shock absorbers, patent CN112727977A provides a ball-jointed end-face constrained variable damping stiffness vibration isolator, including an arched bracket, a vertical central axis arranged in the arched bracket, a vibration isolation assembly installed at both ends of the arched bracket, and a connector assembly slidably mounted on the vertical central axis. The vibration isolation assembly is provided with an elastic limit block for convenient decoupling and regulation. However, the vibration isolator disclosed in patent CN112727977A cannot meet the bending angle control. For example, due to the physical properties of its material, there may be certain bending angle restrictions. When the shock absorber needs to withstand a large bending angle in application, it may exceed the bearing range of its material, resulting in performance degradation or damage. For shock absorbers of certain specific shapes, such as JNHQ150*50M20 rubber shock absorber, its design may be more suitable for certain specific bending angles rather than all angles. If a bending angle inconsistent with its design is encountered in actual application, its vibration reduction effect may be affected.

[0003] In addition, experiments have found that although the vibration isolator disclosed in patent CN112727977A has a large internal stress tolerance, including tension, compression, shear, torsion and other stresses, in some extreme cases, such as overload or long-term operation in harsh environments, it may exceed its stress tolerance, resulting in performance degradation or damage. The stress distribution may be uneven, resulting in excessive stress concentration in certain local areas. These stress concentration areas may become potential damage points, affecting the service life and performance of the shock absorber. Summary of the invention

[0004] The object of the present invention is to provide a lightweight shock absorber to solve the problems raised in the background technology.

[0005] The present invention adopts the following technical scheme: a lightweight shock absorber, comprising: a bracket with bent parts at both ends, each set of bent parts has an installation cavity; and further comprising:

[0006] The central shaft has step structures at both ends; the step structures pass through the mounting cavity and are positioned on the bracket by a positioning assembly; the positioning assembly is also used to adjust the tightening amount between the central shaft and the bracket to achieve the release required for lateral impact;

[0007] A vibration isolator is correspondingly arranged in each group of mounting cavities and sleeved on the step structure;

[0008] A ball joint is slidably mounted on the central axis; the connecting end of the ball joint has a bending strain.

[0009] In a further embodiment, the central shaft comprises: a body, and tightening sections extending axially outward by a predetermined length at both ends of the body; the outer diameter of the tightening section is smaller than the outer diameter of the central shaft, forming a step structure.

[0010] In a further embodiment, the vibration isolation member comprises:

[0011] The mesh pad has a predetermined thickness; the mesh pad is an annular structure and is arranged in the installation cavity.

[0012] In a further embodiment, the ball joint is of a screw type, and a bending elastic member is spirally mounted on its connecting end.

[0013] In a further embodiment, the positioning assembly comprises:

[0014] An adjusting nut, which is screwed onto the tightening section and is located on the outer end surface of the bent portion;

[0015] An upper gasket is sleeved between the adjusting nut and the bent portion;

[0016] The lower gasket is sleeved between the bent portion and the body of the central axis.

[0017] In a further embodiment, the vibration isolation member further comprises:

[0018] The outer disc spring and the inner disc spring are respectively arranged on the outer side surface and the inner side surface of the mesh pad.

[0019] In a further embodiment, the curved elastic member comprises:

[0020] A socket nut, one end of which is screwed onto the ball joint;

[0021] A load-bearing spring, one end of which is embedded in the other end of the sleeve nut;

[0022] A connecting nut, one end of which is connected to the other end of the load spring.

[0023] In a further embodiment, it also includes: a flexible protection ring wrapped around the load-bearing spring.

[0024] In a further embodiment, the mesh pad is made of at least one of rubber or metal.

[0025] Beneficial effects of the invention: The invention discloses a lightweight shock absorber. Firstly, from a structural analysis, the positioning assembly and the bracket are simplified, which reduces the overall weight. At the same time, the performance is improved, such as controlling the tightening amount through the adjusting nut in the positioning assembly to achieve adjustment of different stiffness requirements.

[0026] In addition, the vibration isolation member of the present invention adopts a mesh pad, and the flexible applicability limit replaces the hard limit of the prior art. The limit range can be adjusted as needed to adapt to workpieces of different sizes, shapes or processing requirements. It can cope with more complex working environments. The flexible applicability limit usually has a more precise trigger mechanism, which can be triggered in advance when the machine tool moves close to the limit range, thereby more accurately protecting the safety of the machine tool and the workpiece.

[0027] Finally, the connecting end of the ball joint has a bending strain to meet the displacement required for bending, solve the technical problem of vertical non-decoupling in the prior art, increase the bending stress, and increase the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a structural diagram of a lightweight shock absorber according to Example 1.

[0029] Figure 2 This is a cross-sectional view of a lightweight shock absorber according to Example 1.

[0030] Figure 3 A side view of a lightweight shock absorber of Example 1.

[0031] Figures 1 to 3 The labels in the figure are: bracket 1, bending part 2, vibration isolation part 3, positioning assembly 4, ball joint 5, central axis 6, mesh pad 301, outer disc spring 302, inner disc spring 303, adjusting nut 401, upper gasket 402, lower gasket 403, sleeve nut 501, main body 601, tightening section 602. DETAILED DESCRIPTION

[0032] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0033] Example 1

[0034] In order to solve the multi-directional decoupling problem and stress requirement problem of the prior art and to improve the service life. This embodiment discloses a lightweight shock absorber, such as Figure 1As shown, it includes: a bracket 1 with bent parts 2 at both ends, and a mounting cavity is opened in each set of bent parts 2. It also includes: a central shaft 6 with step structures at both ends. When installed, the step structures pass through the mounting cavity and are positioned on the bracket 1 through the positioning component 4; the positioning component 4 is also used to adjust the tightening amount between the central shaft 6 and the bracket 1 to achieve the release required for lateral impact. Each set of step structures is sleeved with a vibration isolator 3, and the vibration isolator 3 is located in the corresponding mounting cavity.

[0035] Correspondingly, a ball joint 5 is slidably mounted on the central axis 6, which can realize multi-directional rotation and decoupling. At the same time, in order to ensure the decoupling and bending strain requirements required in the vertical direction, the connection end of the ball joint 5 has a bending strain.

[0036] Furthermore, the central shaft 6 includes: a body 601, and tightening sections 602 extending axially outward by a predetermined length at both ends of the body 601; the outer diameter of the tightening section 602 is smaller than the outer diameter of the central shaft 6, forming a step structure.

[0037] Considering that the hard limit in the prior art may be more easily damaged when impacted due to its rigid structure, it cannot provide such precise protection effect and is not easy to replace. Figure 2 As shown, the vibration isolator 3 in this embodiment includes: a mesh pad 301 with a predetermined thickness. In this embodiment, the mesh pad 301 is an annular structure, arranged in the installation cavity, and is configured to be sleeved on the tightening end.

[0038] Correspondingly, the vibration isolator 3 further includes: an outer disc spring 302 and an inner disc spring 303 which are respectively arranged on the outer side surface and the inner side surface of the mesh pad 301 .

[0039] In order to meet different damping release requirements, the positioning assembly 4 in this embodiment is an adjustable structure, which is specifically manifested as follows: the positioning assembly 4 includes: an adjusting nut 401 that is spirally mounted on the tightening section 602 and located on the outer end surface of the bending portion 2. The tightening amount is regulated by adjusting the nut 401. Correspondingly, an upper gasket 402 and a lower gasket 403 are respectively arranged between the adjusting nut 401 and the bending portion 2, and between the bending portion 2 and the body 601 of the central shaft 6. Among them, the upper gasket 402 and the lower gasket 403 can be made of rubber.

[0040] At the same time, in order to meet the vertical decoupling requirements and bending stress, the ball joint 5 is a screw type, and a bending elastic part is spirally installed at its connecting end. The bending elastic part of this embodiment includes: a sleeve nut 501, a load-bearing spring and a connecting nut. Among them, one end of the sleeve nut 501 is spirally installed on the ball joint 5; one end of the load-bearing spring is embedded in the other end of the sleeve nut 501; one end of the connecting nut is connected to the other end of the load-bearing spring. The load-bearing spring in this embodiment is an alloy material, such as a titanium alloy. It can still meet the stiffness requirements while ensuring the elasticity requirements, and it is light in weight.

[0041] In order to further prevent dust and protect the load-bearing spring so as to be suitable for different environments, in this embodiment, a flexible protection ring, such as a rubber ring, is wrapped around the load-bearing spring.

[0042] First of all, from the structural analysis, the positioning assembly 4 and the bracket 1 are simplified, reducing the overall weight. At the same time, the performance is improved, such as controlling the tightening amount through the adjustment nut 401 in the positioning assembly 4 to achieve adjustment of different stiffness requirements.

[0043] It should be noted that the mesh pad 301 in this embodiment is made of at least one of rubber or metal. If it is made of metal, it is a metal mesh pad; if it is made of rubber, it is a rubber mesh pad. Correspondingly, a metal+rubber mesh pad can be prepared by interweaving metal and rubber.

[0044] For example, a wire mesh pad is made of multiple metal wires interwoven and woven. This woven structure gives the wire mesh pad a certain degree of flexibility and elasticity, while also ensuring its strength and stability. The mesh size of the wire mesh pad can be adjusted as needed. The size of the mesh determines the filtering accuracy and carrying capacity of the wire mesh pad. The wire mesh pad can be made into various shapes, such as flat, cylindrical, conical, etc. These shape designs allow the wire mesh pad to adapt to different application scenarios and installation requirements.

[0045] Regardless of the material used, the flexible applicability limit replaces the hard limit of the existing technology. The limit range can be adjusted as needed to adapt to workpieces of different sizes, shapes or processing requirements. It can cope with more complex working environments. For example, when the machine tool is subjected to external shock or vibration, the flexible limit can absorb these shocks through its flexible structure, reducing the risk of damage to the machine tool and the workpiece. It can quickly switch between different processing tasks without spending a lot of time replacing and adjusting the limit switch. The flexible applicability limit usually has a more precise trigger mechanism, which can be triggered in advance when the machine tool moves close to the limit range, thereby more accurately protecting the safety of the machine tool and the workpiece.

[0046] Finally, the connection end of the ball joint 5 has a bending strain to meet the displacement required for bending, solve the technical problem of vertical non-decoupling in the prior art, increase the bending stress, and increase the service life. It is found through experiments that the shock absorber of the present application has a high safety factor, a long service life, and a large degree of stress demand response.

Claims

1. A lightweight shock absorber, characterized in that: include: A bracket having bent portions at both ends, each of which has a mounting cavity; and further comprising: The central shaft has step structures at both ends; the step structures pass through the mounting cavity and are positioned on the bracket by a positioning assembly; the positioning assembly is also used to adjust the tightening amount between the central shaft and the bracket to achieve the release required for lateral impact; A vibration isolator is correspondingly arranged in each group of mounting cavities and sleeved on the step structure; A ball joint is slidably mounted on the central axis; the connecting end of the ball joint has a bending strain.

2. A lightweight shock absorber according to claim 1, characterized in that: The central shaft comprises: a body, and tightening sections extending axially outward by a predetermined length at both ends of the body; the outer diameter of the tightening section is smaller than the outer diameter of the central shaft, forming a step structure.

3. A lightweight shock absorber according to claim 1, characterized in that: The vibration isolation member comprises: The mesh pad has a predetermined thickness; the mesh pad is an annular structure and is arranged in the installation cavity.

4. A lightweight shock absorber according to claim 1, characterized in that: The ball joint is of screw type, and a bending elastic member is spirally installed at the connection end thereof.

5. A lightweight shock absorber according to claim 2, characterized in that: The positioning component comprises: An adjusting nut, which is screwed onto the tightening section and is located on the outer end surface of the bent portion; An upper gasket is sleeved between the adjusting nut and the bent portion; The lower gasket is sleeved between the bent portion and the body of the central axis.

6. A lightweight shock absorber according to claim 3, characterized in that: The vibration isolation member further comprises: The outer disc spring and the inner disc spring are respectively arranged on the outer side surface and the inner side surface of the mesh pad.

7. A lightweight shock absorber according to claim 4, characterized in that: The bending elastic member comprises: A socket nut, one end of which is screwed onto the ball joint; A load-bearing spring, one end of which is embedded in the other end of the sleeve nut; A connecting nut, one end of which is connected to the other end of the load spring.

8. A lightweight shock absorber according to claim 7, characterized in that: Also includes: A flexible protection ring is wrapped around the load-bearing spring.

9. A lightweight shock absorber according to claim 3, characterized in that: The mesh pad is made of at least one of rubber and metal.

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