Compression deformation type sleeve fastener

Abstract

The utility model discloses a compression deformation type sleeve fastener, comprising a sleeve body, a flange is integrally formed on the top of the sleeve body, an annular deformation groove is arranged on the inner wall of the top of the sleeve body, the compression annular deformation groove can form an annular limiting protrusion on the outer wall of the sleeve body, and a second sleeve is coaxially arranged at the lower end of the sleeve body. The sleeve fastener is installed in conjunction with a thin-walled frame, which can make the connection between the upper and lower mounting holes of the thin-walled frame have good rigidity, and also has the advantage that the thin-walled frame will not be squeezed and deformed after being locked by the fastener, and the sleeve fastener can provide axial locking force and greater side sliding resistance.

Description

Technical Field

[0001] The utility model belongs to the technical field of fasteners, in particular to a compression deformation type sleeve fastener used for a thin-wall frame. Background Art

[0002] In the current family car market, new energy vehicles continue to squeeze out the share of traditional fuel vehicles, and the market share of new energy vehicles has exceeded 50%. With the rise and breakthrough of national car companies, the design technology of new energy vehicles has been continuously updated and iterated, and many new problems have encountered unprecedented challenges and tests. The overall direction of vehicle design is to move forward in the direction of component integration and lightweight under the premise of safety and reliability, and the application of hollow and lightweight thin-walled aluminum alloy skeletons (or frames) has increased generation by generation. Therefore, it is worth reflecting on whether the connection points set on the skeleton are suitable according to the traditional method. Usually, the schemes for setting connection points on one side of sheet metal (or skeleton panel) are: panel opening plus welding nuts, top arc welding bolts, panel opening plus rivet bolts, and double-sided opening through bolt nut connection. Since the frame structure is made of aluminum alloy, it is impossible to weld the cold forging of heterogeneous steel nuts, and the aluminum alloy welding seams have the problem of low stripping force and stripping torque in the connection point strength; the use of rivet bolts has the problem of electrochemical reaction caused by the potential difference between the steel and aluminum heterogeneous materials, which makes the steel fasteners easy to corrode; in addition to these problems of the single-panel connection point, the strength and rigidity of the connection are very weak, which is difficult to meet the requirements of the use conditions; the double-sided through-hole through-bolt nut connection is hollow and has no support function in the thin-walled frame. When tightening the bolts or nuts, the crushing deformation of the support surface cannot provide the normal connection preload axial force. For this reason, the connection points of thin-walled aluminum alloy frames cannot use traditional connection fasteners and need to have a structurally innovative connection design. Summary of the invention

[0003] The technical problem to be solved by the utility model is to provide a knurled tooth limiting sleeve fastener which can support the inner surface of a thin-walled frame, improve its use rigidity, have good installation passability, and has good axial limiting and radial anti-rotation effects.

[0004] In order to solve the above technical problems, the present invention is achieved through the following technical solutions: a compression deformation type sleeve fastener, comprising a sleeve body, a flange is integrally formed on the top of the sleeve body, an annular deformation groove is arranged on the top inner wall of the sleeve body, and the compression annular deformation groove can form an annular limiting protrusion on the outer wall of the sleeve body, and the distance dimension between the top surface of the annular limiting protrusion and the flange is the same as the thickness dimension of the thin-walled frame, and a second sleeve is coaxially arranged at the lower end of the sleeve body, and a limiting shoulder surface is formed between the lower end surface of the sleeve body and the second sleeve, and an annular cutting groove is arranged on the second sleeve, and the upper part of the annular cutting groove extends to the limiting shoulder surface of the sleeve body, and the sleeve body and the second sleeve are coaxially provided with a through hole that intersects with each other, and the height dimension of the second sleeve is smaller than the thickness dimension of the thin-walled frame by 0.2-1mm.

[0005] Preferably, the height dimension of the annular limiting protrusion formed by compressing the annular deformation groove on the outer wall of the sleeve body is 0.2-0.8 mm.

[0006] Preferably, the width of the annular groove is 1 / 3-1 / 2 of the width of the second sleeve.

[0007] Preferably, the through hole is provided with a first bevel structure and a second bevel structure at the upper and lower ends thereof, respectively.

[0008] Preferably, the second sleeve is configured as a frustum-shaped structure that is larger at the bottom and smaller at the top.

[0009] Preferably, the frustum-shaped structure of the second sleeve is provided with grooves penetrating vertically in a linear array.

[0010] Compared with the prior art, the utility model is beneficial in that: an annular limiting protrusion is formed by the annular deformation groove on the sleeve fastener, and an axial limiting effect is formed by the contact between the annular limiting protrusion and the flange and the upper part of the thin-walled frame. At the same time, the sleeve body and the upper mounting hole of the thin-walled frame are matched with an interference fit of 0.05mm-0.30mm, which serves to limit the anti-rotation of the sleeve fastener and the upper mounting hole of the thin-walled frame. The lower material of the thin-walled frame is squeezed into the annular cutting groove, and the annular cutting groove and the limiting shoulder surface are in contact with the lower part of the thin-walled frame to form an axial limiting effect. The lower material of the thin-walled frame is squeezed into the annular cutting groove, and the lower material of the thin-walled frame is squeezed into the groove, which serves to limit the anti-rotation of the sleeve fastener and the lower mounting hole of the thin-walled frame. At the same time, the sleeve fastener can support and strengthen the thin-walled frame, thereby increasing the overall structural strength of the thin-walled frame during use. In addition, the sleeve fastener and the upper and lower mounting holes of the thin-walled frame can be pre-positioned for installation through manual operation, which has the advantages of good assembly passability and convenient assembly.

[0011] The sleeve fastener is installed in conjunction with the thin-walled frame, which can ensure good rigidity at the connection between the upper and lower mounting holes of the thin-walled frame, and also has the advantage that the thin-walled frame will not be squeezed and deformed after being locked by the fastener. The sleeve fastener can provide axial locking force and greater sideslip resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The utility model is further described below in conjunction with the accompanying drawings.

[0013] Figure 1 It is a stereogram of the utility model.

[0014] Figure 2 It is the front view of the utility model.

[0015] Figure 3 It is a front view of the installation structure of the utility model and the thin-wall frame.

[0016] Figure 4 yes Figure 3 AA section view.

[0017] Figure 5 It is a schematic diagram of an upper assembly tool, a lower assembly tool and the utility model being used together but not yet pressed together.

[0018] Figure 6 It is a schematic diagram of the upper assembly tool, the lower assembly tool and the utility model being used together to complete the press assembly. DETAILED DESCRIPTION

[0019] The utility model is described in detail below in conjunction with specific implementation methods:

[0020] like Figures 1 to 6 A compression deformation type sleeve fastener shown in the figure includes a sleeve body 1, a flange 2 is integrally formed on the top of the sleeve body 1, an annular deformation groove 5 is arranged on the top inner wall of the sleeve body 1, and the compression annular deformation groove 5 can form an annular limiting protrusion 51 on the outer wall of the sleeve body 1, and the distance dimension between the top surface of the annular limiting protrusion 51 and the flange 2 is the same as the thickness dimension of the thin-walled frame 8, and the lower end of the sleeve body 1 is coaxially arranged with a second sleeve 7, and a limiting shoulder surface 4 is formed between the lower end surface of the sleeve body 1 and the second sleeve 7, and an annular cutting groove 6 is arranged on the second sleeve 7, and the upper part of the annular cutting groove 6 extends to the limiting shoulder surface 4 of the sleeve body 1, and the sleeve body 1 and the second sleeve 7 are coaxially arranged with a through hole 3 that intersects with each other, and the height dimension of the second sleeve 7 is smaller than the thickness dimension of the thin-walled frame 8 by 0.2-1mm.

[0021] The height dimension of the annular deformation groove 5 is set to 0.1mm. After the annular deformation groove 5 is fully compressed, its height dimension is 0. The depth dimension of the annular deformation groove 5 is 1 / 2-2 / 3 of the width dimension of the sleeve body 1. The height dimension of the annular limiting protrusion 51 formed on the outer wall of the sleeve body 1 by compressing the annular deformation groove 5 is 0.2-0.8mm, which can not only ensure the service strength of the sleeve body 1, but also the formed annular limiting protrusion 51 cooperates with the flange 2 to play a good axial limiting role on the upper part of the thin-walled frame 8.

[0022] The width of the annular groove 6 is 1 / 3-1 / 2 of the width of the second sleeve 7, which can ensure that the metal material of the thin-walled frame 8 is squeezed and deformed to flow into the annular groove 6 to form a fixed limit, and at the same time ensure the structural strength of the second sleeve 7. In order to facilitate the guide shafts of the upper and lower assembly tools to be embedded and installed in the through hole 3, the first bevel structure 31 and the second bevel structure 32 can guide the guide shafts of the upper assembly tool 10 and the lower assembly tool 11.

[0023] The material hardness of the thin-walled frame 8 is less than that of the sleeve fastener. After the thin-walled frame 8 is squeezed, its material will deform and flow into the annular groove 6. The second sleeve 7 is configured as a frustum-shaped structure with a larger bottom and a smaller top. The frustum-shaped structure facilitates the thin-walled frame 8 to flow into the annular groove 6 for limiting position after being squeezed.

[0024] The second sleeve 7 has a frustum-shaped structure with grooves 9 extending vertically in a linear array. When the thin-walled frame 8 is squeezed, its material will deform and flow into the grooves 9, thereby preventing the sleeve fastener and the thin-walled frame 8 from rotating.

[0025] The outer diameters of the sleeve body 1 and the second sleeve 7 match the apertures of the upper and lower mounting holes of the thin-walled frame 8. The operator pushes the sleeve fastener to slide and embed it into the upper mounting hole of the thin-walled frame 8. At the same time, the sleeve body 1 and the upper mounting hole of the thin-walled frame 8 are matched with an interference fit of 0.05mm-0.30mm (due to the small interference fit assembly method here, the operator manually presses or knocks the flange 2 with a tool to easily pre-position the sleeve body 1 and install it in the upper and lower mounting holes of the thin-walled frame 8), which serves to limit the anti-rotation of the sleeve fastener and the upper mounting hole of the thin-walled frame 8. At this time, the limiting shoulder surface 4 at the bottom end of the sleeve body 1 contacts and limits the thin-walled frame 8, and the upper assembly tool 10 and the lower assembly tool 1 are used. 1 is slidably embedded in the upper and lower parts of the through hole 3. Under the extrusion of the upper assembly tool 10 and the lower assembly tool 11, the annular deformation groove 5 on the top inner wall of the sleeve body 1 is compressed. After the annular deformation groove 5 is compressed, an annular limiting protrusion 51 is formed on the outer wall of the sleeve body 1. The annular limiting protrusion 51 cooperates with the flange 2 to clamp the upper part of the thin-walled frame 8, which can form an axial limiting effect on the upper part of the thin-walled frame 8. The material of the lower part of the thin-walled frame 8 is squeezed into the annular cutting groove 6. The annular cutting groove 6 and the limiting shoulder surface 4 cooperate to clamp the lower part of the thin-walled frame 8, forming an axial limiting effect on the lower part of the thin-walled frame 8. The material of the lower part of the thin-walled frame 8 is squeezed into the groove 9, which serves the purpose of limiting the anti-rotation of the sleeve fastener and the lower mounting hole of the thin-walled frame 8. The guide shaft of the lower assembly tool 11 is set as a frustum-shaped structure with a small bottom and a large top. After the limiting end surface of the lower assembly tool 11 contacts the lower end of the thin-walled frame 8, the lower part of the guide shaft can squeeze the second sleeve 7 outward, thereby achieving a better limiting effect. The bolt slides through the matching component and the through hole 3 on the thin-walled frame 8, and the lower end of the bolt is locked and fixed by a lock nut.

Claims

1. A compression deformation sleeve fastener, characterized in that: The invention comprises a sleeve body (1), wherein a flange (2) is integrally formed on the top of the sleeve body (1), an annular deformation groove (5) is arranged on the inner wall of the top of the sleeve body (1), and the annular deformation groove (5) can be compressed to form an annular limiting protrusion (51) on the outer wall of the sleeve body (1), and the distance between the top surface of the annular limiting protrusion (51) and the flange (2) is the same as the thickness of the thin-walled frame (8), and a second sleeve (7) is coaxially arranged at the lower end of the sleeve body (1), and a limiting shoulder surface (4) is formed between the lower end surface of the sleeve body (1) and the second sleeve (7), and an annular cutting groove (6) is arranged on the second sleeve (7), and the upper part of the annular cutting groove (6) extends to the limiting shoulder surface (4) of the sleeve body (1), and the sleeve body (1) and the second sleeve (7) are coaxially provided with intersecting through holes (3), and the height of the second sleeve (7) is 0.2-1 mm smaller than the thickness of the thin-walled frame (8).

2. The compression deformation sleeve fastener according to claim 1, characterized in that: The compression annular deformation groove (5) can form an annular limiting protrusion (51) on the outer wall of the sleeve body (1) with a height dimension of 0.2-0.8 mm.

3. The compression deformation sleeve fastener according to claim 1, characterized in that: The width of the annular groove (6) is 1 / 3 to 1 / 2 of the width of the second sleeve (7).

4. The compression deformation sleeve fastener according to claim 1, characterized in that: The through hole (3) is provided with a first oblique angle structure (31) and a second oblique angle structure (32) at the upper and lower ends respectively.

5. The compression deformation sleeve fastener according to claim 1, characterized in that: The second sleeve (7) is configured as a frustum-shaped structure that is larger at the bottom and smaller at the top.

6. The compression deformation sleeve fastener according to claim 1, characterized in that: The second sleeve (7) has a frustum-shaped structure provided with grooves (9) extending vertically in a linear array.

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