Combined type buffer

Abstract

The utility model discloses a combined type buffer which comprises an inner cylinder and an outer cylinder which can axially move relative to each other, an elastic body and a spring are arranged between the inner cylinder and the outer cylinder, the elastic body and the spring are arranged in the same axial direction, and in a normal state, the elastic body and the spring abut against the inner wall of the inner cylinder and the inner wall of the outer cylinder at the maximum interval displacement position. The elastic body is limited in the inner cylinder and the outer cylinder in the radial direction. According to the combined type buffer, the elastic body and the spring are matched for use, so that the buffer has a good continuous anti-buffering effect after being impacted and pressed, and can be matched with the body structures of the inner cylinder and the outer cylinder. And secondly, the limiting check block is arranged on the inner wall of the outer cylinder, and the elastic body can have a better limiting and deviation preventing effect under the action of the inner cylinder.

Description

Technical Field

[0001] The utility model relates to the technical field of buffers, in particular to a composite buffer. Background Art

[0002] The buffer is mainly used in large crane equipment such as port machinery, mining machinery, heavy machinery, steel mills, etc. in complex working environments. Existing spring buffers may have metal breakage or deformation problems in high-frequency working environments. Therefore, polyurethane buffers are used. However, polyurethane buffers have poor continuous impact resistance and cannot achieve good buffering effect. In addition, existing polyurethane buffers are directly bonded to the support and are not easy to disassemble or install. At the same time, the bonding (shear force) strength is not enough, and the iron plate will fall off from the polyurethane elastomer after oxidation.

[0003] This case was created to solve the above problems. Utility Model Content

[0004] 1. Technical issues to be resolved

[0005] In view of the deficiencies in the prior art, the utility model provides a composite buffer, which solves the problems raised in the above background technology.

[0006] (II) Technical solution

[0007] To achieve the above objectives, the utility model is implemented through the following technical solutions: a composite buffer, including an inner cylinder and an outer cylinder that can move axially with respect to each other, an elastomer and a spring are inserted between the inner cylinder and the outer cylinder, wherein the elastomer and the spring are arranged in the same axial direction, and under normal conditions, the elastomer and the spring are placed against the inner walls of the inner cylinder and the outer cylinder at the maximum spacing displacement; the elastomer is radially limited within the inner cylinder and the outer cylinder.

[0008] Preferably, the outer cylinder is also provided with an annular inner buckle at the opening, and an annular protrusion is provided at the end of the inner cylinder corresponding to the annular buckle, so that the two are not subjected to external forces when they are in contact.

[0009] Preferably, the spring is cast in the elastomer.

[0010] Preferably, structural deformation spaces are formed between the elastomer and the inner cylinder and the outer cylinder respectively, wherein the annular protrusion is located in the outer cylinder and extends toward the inner circumference, so that a relatively small gap is formed between the elastomer and the inner cylinder, and a relatively large gap is formed between the elastomer and the outer cylinder.

[0011] Preferably, the annular protrusion is flush with the inner wall of the inner cylinder, one end of the elastomer is placed at the position of the annular protrusion of the inner cylinder, and its outer periphery is in contact with the circumferential inner wall of the inner cylinder, and the outer edge of the elastomer only forms a large gap with the inner wall of the outer cylinder.

[0012] Preferably, the spring is placed between the elastic body and the inner wall of the inner cylinder.

[0013] Preferably, a limit stopper is provided at the end of the inner wall of the outer cylinder to form an enclosure limit for the bottom support position of the elastic body.

[0014] Preferably, the elastic body is made of polyurethane, foam rubber or other similar resilient materials but is not limited to the above materials.

[0015] (III) Beneficial effects

[0016] After adopting the above technical solution, the utility model has the following advantages compared with the prior art: the utility model is a composite buffer, which, through the coordinated use of an elastic body and a spring, enables the buffer to have a good continuous anti-buffering effect after impact and pressure, and can adapt to the inner cylinder and outer cylinder body structure. Secondly, the inner wall of the outer cylinder is provided with a limit stopper and the inner cylinder and the elastic body can have a better limit and anti-deviate effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of Embodiment 1 of the present utility model;

[0018] Figure 2 This is a schematic diagram of the second embodiment of the present utility model.

[0019] In the figure: 1, inner cylinder; 2, outer cylinder; 3, elastic body; 4, spring; 5, large gap; 6, small gap; 7, limit stop; 8, annular protrusion. DETAILED DESCRIPTION

[0020] The utility model is further described in detail below through the drawings and embodiments.

[0021] like Figure 1 As shown: as a first embodiment, a composite buffer includes an inner cylinder 1 and an outer cylinder 2. The inner part of the outer cylinder 2 is hollow and one side is set as an opening. The open side of the inner cylinder 1 penetrates into the opening and the two can move axially. An elastic body is placed between the inner cylinder 1 and the outer cylinder 2. The outer cylinder 2 is also provided with an annular inner buckle at the opening, and the end of the inner cylinder 1 corresponding to it is provided with an annular protrusion 8 extending toward the inner circumference. When the two are in contact, they are not subjected to external forces. Under normal conditions, the elastic body is against the inner walls of the inner cylinder 1 and the outer cylinder 2 at the maximum spacing displacement. When the outer end of the inner cylinder 1 is subjected to longitudinal impact and vibration, it deforms and absorbs energy to provide buffering.

[0022] A spring 4 is cast in the elastomer. The spring 4 has a large rebound force and can be combined with the elastomer, so that the elastomer has a better buffering effect and is more durable in use. At the same time, the spring 4 can be prevented from rusting in a humid environment.

[0023] The inner cylinder 1 and the outer cylinder 2 are enclosed outside the elastic body, which can give it a complete seal. At the same time, the design of the structure of the inner cylinder 1 and the outer cylinder 2 plays a role in accommodating and limiting its overall deformation.

[0024] Specifically, the annular protrusion 8 is provided so that structural deformation spaces are formed between the elastomer and the inner cylinder 1 and the outer cylinder 2, respectively. With the annular protrusion 8 located in the outer cylinder 2, a relatively small gap 6 is formed between the elastomer and the inner cylinder 1, and a relatively large gap 5 is formed between the elastomer and the outer cylinder 2. The distribution of the large gap 5 and the small gap 6 matches the deformation position of the elastomer. For example, the elastomer is compressed axially in the early stage, and at the same time, it is slightly deformed radially outward to match the small gap 6. The radially outward size of the elastomer increases during the continuous extrusion process, and is further extruded to fill and accommodate in the large gap 5.

[0025] Due to the existence of the spring 4 (the compression of the spring 4 is mainly axial deformation, without radial deformation), the radial deformation of the elastic body compressed in the early stage is very small, so the size of the small gap 6 can be kept as small as possible to better limit the deformation body.

[0026] Furthermore, the existing buffer directly bonds the elastic body to the iron plate, and the iron plate is provided with mounting holes. This structure has the following disadvantages: insufficient bonding (shearing force) strength, and the iron plate will fall off from the elastic body after oxidation. Therefore, in this embodiment, a limit stopper 7 is further provided at the end of the inner wall of the outer cylinder 2 to form an enclosure for the bottom support position of the elastic body, and cooperates with the annular protrusion 8 to limit the other side of the elastic body, so as to avoid displacement bias / misalignment caused by long-term force and reduce functionality.

[0027] It should be noted that the elastomer is made of polyurethane, but is not limited to polyurethane, and may also be made of polyurethane, rubber, foam rubber, polyether and other materials.

[0028] like Figure 2 As shown: As a second embodiment, an annular protrusion 8 is provided at the end of the inner cylinder 1. The annular protrusion 8 does not extend inward, and only abuts against the annular inner buckle of the outer cylinder 2 to limit outward movement and falling off. One end of the elastomer is only placed at the position of the annular protrusion 8 of the inner cylinder 1, and its outer periphery abuts against the circumferential inner wall of the inner cylinder 1. The outer edge of the elastomer only forms a buffer gap with the inner wall of the outer cylinder 2 to provide space for the compressed elastomer. Secondly, the two ends of the elastomer are respectively limited and will not detach from the original position.

[0029] At the same time, a spring 4 can be directly placed between the elastic body and the inner wall of the inner cylinder 1. Under normal conditions, the spring 4 is slightly compressed by the position of the inner cylinder 1, which has a good buffering effect after impact and pressure, and makes the elastic body have a better limiting and anti-deviating effect.

[0030] The above-mentioned embodiments are for inspiration. Through the above-mentioned description, relevant staff can make various changes and modifications without departing from the scope of the invention. The technical scope of this new type of use is not limited to the content in the specification, and its protection scope must be determined according to the scope of the claims.

Claims

1. A composite buffer, characterized in that: It comprises an inner cylinder and an outer cylinder which can move axially relative to each other, an elastic body and a spring are placed between the inner cylinder and the outer cylinder, wherein the elastic body and the spring are arranged in the same axial direction, and under normal conditions, the elastic body and the spring are pressed against the inner walls of the inner cylinder and the outer cylinder at the maximum spacing displacement; the elastic body is radially limited within the inner cylinder and the outer cylinder.

2. A composite buffer according to claim 1, characterized in that: The outer cylinder is also provided with an annular inner buckle at the opening, and an annular protrusion is provided at the end of the inner cylinder corresponding to the outer buckle, so that the two are not subjected to external forces when they are in contact.

3. A composite buffer according to claim 2, characterized in that: The spring is cast in the elastic body.

4. A composite buffer according to claim 2, characterized in that: The elastomer forms structural deformation spaces with the inner cylinder and the outer cylinder respectively, wherein the annular protrusion is located in the outer cylinder and extends toward the inner circumference, so that a relatively small gap is formed between the elastomer and the inner cylinder, and a relatively large gap is formed between the elastomer and the outer cylinder.

5. A composite buffer according to claim 2, characterized in that: The annular protrusion is flush with the inner wall of the inner cylinder, one end of the elastic body is placed at the position of the annular protrusion of the inner cylinder, and its outer periphery is in contact with the circumferential inner wall of the inner cylinder. The outer edge of the elastic body only forms a large gap with the inner wall of the outer cylinder.

6. A composite buffer according to claim 5, characterized in that: The spring is placed between the elastic body and the inner wall of the inner cylinder.

7. A composite buffer according to any one of claims 1 to 6, characterized in that: A limit stopper is provided at the end of the inner wall of the outer cylinder to form an enclosure limit for the bottom support position of the elastic body.

8. The composite buffer according to claim 1, characterized in that: The elastic body is made of any one or more of polyurethane and foam rubber materials.

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