Rubber connecting piece

Abstract

The utility model relates to the technical field of anti-loose fasteners, and provides a rubber connecting piece which comprises a hollow rubber column and a hard piece arranged in an inner hole of the rubber column. A deformation groove is formed in the inner side surface of the rubber column; the end face of the hard piece is provided with an arc chamfer and a limiting groove embedded with the rubber column. A first blocking part for axial limiting and restraining and a second blocking part for rotary limiting and restraining are arranged on the outer side face of the hard piece; the hard piece is provided with a central through hole, and a connecting part is arranged in the central through hole. The first blocking part and the second blocking part can prevent the hard piece from rotating relative to the rubber column or falling off from the rubber column, and the connecting stability of the rubber connecting piece is improved. The deformation groove and the limiting groove can prevent the rubber column from being separated due to excessive deformation at the position where the rubber column is connected with the hard part when being pressed, so that firm connection between the rubber column and the hard part is ensured; the stress area of the end face of the hard part can be increased through the arc chamfers, and stable supporting force is provided.

Description

Technical Field

[0001] The utility model relates to the technical field of anti-loosening fasteners, in particular to a rubber connecting piece. Background Art

[0002] In the existing technology, profiles are usually connected by rigid connection methods such as screw connection, riveting, and welding. However, the screw connection method can easily cause damage to the profile. For example, during the assembly process, the impact force of the screw moving forward can easily damage the profile; in usage scenarios such as vehicles or machinery and equipment, the screw is in vibration and can easily cause damage to the profile, thereby reducing its service life.

[0003] Utility model patent application number 200520001702.8 discloses a rubber nut comprising a nut coaxially embedded within a hollow cylindrical rubber buffer body with both ends open, and integrally integrated with the body. The rubber portion of the rubber nut described in this utility model undergoes compression deformation (thickening) due to the force exerted by the I-shaped brass nut. When the nut reaches the preload, the rubber buffer body reaches its maximum compression deformation, and the thickened portion of the rubber nut can firmly clamp one component to another, thereby playing a connecting role. At the same time, the rubber can buffer the pressure exerted on the connected parts during the deformation process, playing a role in protecting the connected parts. However, this utility model patent does not limit the nut. During connection and assembly, the nut and the rubber buffer body are prone to relative rotation or axial detachment, which is not conducive to assembly stability. Utility Model Content

[0004] The purpose of the utility model is to provide a rubber connector, aiming to improve the problem of poor stability of existing rubber nuts.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A rubber connector comprises a hollow rubber column and a hard component arranged in the inner hole of the rubber column;

[0007] A deformation groove is provided on the inner side surface of the rubber column;

[0008] The end surface of the hard part is provided with a circular chamfer and a limiting groove engaged with the rubber column;

[0009] The outer surface of the hard member is provided with a first blocking portion for axial limit constraint and a second blocking portion for rotation limit constraint;

[0010] The hard component is provided with a central through hole, and a connecting portion is provided in the central through hole.

[0011] Preferably, the first blocking portion is an annular shoulder or an annular groove.

[0012] Preferably, there is at least one first blocking portion.

[0013] Preferably, the second blocking portion is a plane passing through both ends of the hard component, or the second blocking portion is a spline structure.

[0014] Preferably, the hard component is arranged on one end of the rubber column to form a connecting end.

[0015] Preferably, a convex edge is provided on the outer side surface of the other end of the rubber column.

[0016] Preferably, the surface roughness of the rubber column is 1.1-1.8 μm; the hardness of the rubber column is 65-75 Shore A.

[0017] Preferably, the connecting portion is a threaded structure.

[0018] After adopting the above technical solution, the utility model has the following advantages compared with the background technology:

[0019] 1. In the present invention, a first blocking portion for axial limit constraint and a second blocking portion for rotation limit constraint are provided on the outer surface of the hard part, which can prevent the hard part from rotating relative to the rubber column or falling off from the rubber column when the connecting part is screwed with the bolt, thereby improving the stability of the connection of the rubber connector.

[0020] 2. In the present invention, a deformation groove is provided on the inner side surface of the rubber column. When the rubber connector is under pressure, the deformation groove deforms first, and a limiting groove is also provided on the end surface of the hard component to engage with the rubber column, which can limit the expansion and deformation of the rubber column. It can avoid the rubber column from being separated due to excessive deformation at the connection position with the hard component when under pressure, thereby ensuring the reliability of the connection between the rubber column and the hard component.

[0021] 3. The end surface of the hard part in the present invention is provided with an arc chamfer, which can increase the force-bearing area of ​​the end surface of the hard part, provide stable supporting force, and is not easy to tear the rubber column when subjected to force, thereby ensuring the service life of the rubber column. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a cross-sectional view of the rubber connector described in the present invention;

[0023] Figure 2 This is a schematic diagram of the hard part of the rubber connector of the present invention;

[0024] Figure 3 This is a cross-sectional view of another embodiment of the rubber connector of the present invention;

[0025] Figure 4This is a schematic diagram of another embodiment of the hard part of the rubber connector according to the present invention;

[0026] Figure 5 This is a structural schematic diagram of the rubber connector described in the present invention.

[0027] Description of reference numerals:

[0028] 10. Rubber column; 101. Convex edge; 102. Deformation groove;

[0029] 11. Hard part; 111. First blocking portion; 112. Second blocking portion; 113. Central through hole;

[0030] 114. Connecting portion; 115. Arc chamfer; 116. Limiting groove. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0032] In addition, it should be noted that the terms "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. are all based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element of the present invention must have a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0033] When an element is referred to as being “fixed to,” “disposed on,” or “provided on” another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it can be directly connected to the other element or indirectly connected to the other element.

[0034] Unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be interpreted broadly. For example, they can refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of these terms in the utility model based on specific circumstances.

[0035] Example

[0036] Please refer to Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5 As shown, this embodiment provides a rubber connector, including a hollow rubber column 10 and a hard part 11 arranged in the inner hole of the rubber column 10. The rubber column 10 can be cast outside the hard part 11, and the hard part 11 is provided with a central through hole 113. A connecting portion 114 is provided in the central through hole 113. The connecting portion 114 can be a threaded structure. The rubber connector can be used to connect profiles in combination with other connecting components (such as bolts) through the connecting portion 114. Since the rubber column 10 has good elasticity, shock resistance and pressure resistance, it can buffer the impact force generated by the bolts on the profile during connection, and absorb the force generated by vibration during use, thereby protecting the connected profile from damage and extending the service life.

[0037] Furthermore, a first blocking portion 111 for axial limit constraint and a second blocking portion 112 for rotational limit constraint are provided on the outer surface of the hard part 11 to prevent the hard part 11 from rotating relative to the rubber column 10 or falling off from the rubber column 10 when the connecting portion 114 is screwed into the bolt, thereby improving the stability of the connection of the rubber connector.

[0038] In addition, a deformation groove 102 is provided on the inner side surface of the rubber column 10. When the rubber connector is under pressure, the wall thickness of the rubber column 10 at the position of the deformation groove 102 is different and it is easy to deform under pressure. Therefore, when the rubber connector is under pressure, the deformation groove 102 deforms first, which can prevent the rubber column 10 from being separated due to excessive deformation at the position where it is connected to the hard component 11, thereby ensuring the reliability of the connection between the rubber column 10 and the hard component 11.

[0039] In addition, a circular chamfer 115 is provided on the end face of the hard part 11 (when the second blocking portion 112 is provided at both ends of the hard part 11, the circular chamfer 115 can be extended to the end face of the hard part 11). By providing the circular chamfer 115, the force-bearing area of ​​the end face of the hard part 11 can be increased. Regardless of whether the rubber connector is used vertically or horizontally, the hard part 11 can provide stable supporting force. Moreover, compared with the stress concentration at sharp corners, the circular chamfer 115 is not easy to tear the rubber column 10 when subjected to force, which can ensure the service life of the rubber column 10.

[0040] A limiting groove 116 is also provided on the end surface of the hard part 11. After the rubber column 10 is cast outside the hard part 11, a convex ring can be formed to fit into the limiting groove 116. This can limit the expansion and deformation of the rubber column 10 and prevent the rubber column 10 from expanding and deforming outwards and separating from the hard part 11 when the rubber connector is under pressure. In a preferred embodiment, the first blocking portion 111 is at least one annular shoulder (such as Figure 3 as shown) or annular groove (as Figure 1As shown), after the rubber column 10 is cast outside the hard part 11, it can form an axial interlock with the annular boss or annular groove, thereby limiting the axial displacement of the hard part 11 in the rubber column 10, preventing the hard part 11 from moving or falling off, and further ensuring the stability of the connection of the rubber connector.

[0041] In a preferred embodiment, the second blocking portion 112 is a plane that passes through both ends of the hard member 11 (eg Figure 4 As shown), the plane makes the outer side of the hard member 11 form an irregular shape, or the second blocking portion 112 is a spline structure (as shown Figure 2 As shown), the key teeth of the spline structure can be trapezoidal or I-shaped, thereby increasing the contact area and tight bonding with the rubber column 10. After the rubber column 10 is cast outside the hard part 11, it can form a circumferential interlock with the irregularly shaped hard part 11 or the spline structure, thereby limiting the rotation of the hard part 11 in the rubber column 10, avoiding the hard part 11 from rotating relative to the rubber column 10 during connection, so as to ensure the stability of the rubber connector.

[0042] like Figure 1 、 Figure 3 and Figure 5 As shown, in this embodiment, the hard component 11 is arranged on one end of the rubber column 10 to form a connecting end, which is used to cooperate with other connecting components (such as bolts) for fastening, and the other end of the rubber column 10 is used to connect to the profile.

[0043] like Figure 1 、 Figure 3 and Figure 5 As shown, in this embodiment, a convex edge 101 is provided on the outer surface of the other end of the rubber column 10. The convex edge 101 is an annular structure integrally formed with the rubber column 10. When the rubber connector is connected to the profiles, the two connected profiles are respectively located on the upper and lower surfaces of the convex edge 101. At this time, the convex edge 101 can play a role in buffering and shock absorption, thereby reducing the pressure on the connected profiles and playing a protective role.

[0044] In this embodiment, the rubber column 10 has a surface roughness of 1.1 to 1.8 μm, exhibiting excellent wear resistance and a good fit with the hard component 11, effectively reducing wear and extending service life. The rubber column 10 has a hardness of 65 to 75 Shore A, exhibiting excellent elasticity, shock resistance, and compressive strength, effectively protecting the connected profiles.

[0045] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A rubber connector, characterized in that: It comprises a hollow rubber column and a hard part arranged in the inner hole of the rubber column; A deformation groove is provided on the inner side surface of the rubber column; The end surface of the hard part is provided with a circular chamfer and a limiting groove engaged with the rubber column; The outer surface of the hard member is provided with a first blocking portion for axial limit constraint and a second blocking portion for rotation limit constraint; The hard component is provided with a central through hole, and a connecting portion is provided in the central through hole.

2. The rubber connector according to claim 1, characterized in that: The first blocking portion is an annular shoulder or an annular groove.

3. The rubber connector according to claim 2, characterized in that: There is at least one first blocking portion.

4. The rubber connector according to claim 1, characterized in that: The second blocking portion is a plane passing through both ends of the hard component, or the second blocking portion is a spline structure.

5. The rubber connector according to claim 1, characterized in that: The hard component is arranged on one end of the rubber column to form a connecting end.

6. The rubber connector according to claim 5, characterized in that: A convex edge is provided on the outer side surface of the other end of the rubber column.

7. The rubber connector according to claim 1, characterized in that: The surface roughness of the rubber column is 1.1-1.8 μm; the hardness of the rubber column is 65-75 Shore A.

8. The rubber connector according to claim 1, characterized in that: The connecting portion is a threaded structure.

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