Riveting device

Abstract

The object of the present invention is to provide a riveting device that facilitates the disengagement of a pressure head from a riveted component so as to facilitate the reset of the pressure head. To achieve the above object, the present invention adopts the following technical scheme: a riveting device, including a press, a riveting assembly is provided at the output end of the press, the riveting assembly includes a pressure head, the upper end of the pressure head is connected and fixed to the output end of the press, a plurality of riveting protrusions are provided at the lower side of the pressure head, the riveting protrusions include a lower end face located at the lower side and a side face located at the circumferential side, the lower edge of the side face is connected to the edge of the lower end face, and part or all of the side face gradually extends from bottom to top toward the circumferential inner side so that part or all of the side face is inclined, so that an acute angle is formed between the inclined side face and the lower end face.

Description

Technical Field

[0001] The invention relates to a riveting device. Background Art

[0002] The bearings are usually fixed to the aluminum end caps by riveting. Figure 1 and Figure 2 As shown, the aluminum end cover 1 has a bearing fixing groove which is open to one axial side, and a bearing 2 is pressed in the bearing fixing groove. An annular cam ring 11 to be riveted is provided on the axial surface of the aluminum end cover 1. The cam ring 11 to be riveted is riveted by the riveting protrusion on the lower side of the pressure head, so that the riveting point of the cam ring to be riveted is deformed and extended circumferentially inward and circumferentially outward to form a square protrusion 12 with certain tensile and shear strength. The square protrusion 12 is located on the axial side of the outer ring of the bearing 2, and can play an axial limiting role of the bearing 2.

[0003] Since there are no obstacles on the inner and outer sides of the convex ring 11 to be riveted, the square protrusion will not extend upward to stick to the side of the riveting protrusion closest to and farthest from the bearing 2. Since the convex ring 11 to be riveted is annular, the square protrusion 12 generated by the pressure of the riveting point cannot extend to the clockwise rotation side and the counterclockwise rotation side of the convex ring 11 to be riveted with the axis of the pressure head as the center, so that the riveting protrusion will be stuck on the convex ring 11 to be riveted, and it is difficult to disengage the pressure head from the end cover. When the pressure head is reset upward, the end cover will be lifted up, so that the end cover may be broken. Summary of the invention

[0004] The object of the present invention is to provide a riveting device which is convenient for the separation between a pressing head and a riveted component so as to facilitate the reset of the pressing head.

[0005] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a riveting device, including a press, a riveting assembly is provided at the output end of the press, the riveting assembly includes a pressing head, the upper end of the pressing head is connected and fixed to the output end of the press, and a plurality of riveting protrusions are provided on the lower side of the pressing head, the riveting protrusions include a lower end face located on the lower side and a side face located on the circumferential side, the lower edge of the side face is connected to the edge of the lower end face, and part or all of the side face gradually extends circumferentially inward from bottom to top so that part or all of the side face is inclined, so that an acute angle is formed between the inclined side face and the lower end face.

[0006] When the device of the present invention is used, the aluminum material at the riveting point relative to the inclined side surfaces in the clockwise and counterclockwise directions of the riveting protrusion is deformed and extends upward. Due to the setting of the inclined surface, less or even no aluminum material can adhere to the inclined surface, and the reset of the pressure head will be easier, and the pressure head will be more easily detached from the end cover to avoid the end cover being lifted up and broken.

[0007] Preferably, the plurality of riveting protrusions are arranged in an annular pattern with the vertical axis of the ram as the center, and the side surfaces of the riveting protrusions on the clockwise rotation direction and the counterclockwise rotation direction with the vertical axis of the ram as the center are inclined to form the acute angle with the lower end surface.

[0008] Preferably, a compression spring and a pressing sleeve are provided on the outer side of the ram, the cross-section of the pressing sleeve is annular, a fixing block is fixed to the upper end of the ram, the upper end of the compression spring contacts the lower end surface of the fixing block, the lower end of the compression spring contacts the upper end surface of the pressing sleeve, and a limiting structure is provided between the pressing sleeve and the ram to prevent the pressing sleeve from falling away from the ram downward. Under the action of the compression spring, the plane where the lower end surface of the pressing sleeve is located is below the plane where the lower end surface of the riveting protrusion is located.

[0009] When the riveting protrusion under the pressure head rivets the convex ring to be riveted on the end cover, the pressing sleeve will press on the axial surface of the end cover, which can prevent the end cover from bouncing and jumping due to instantaneous force, so as to improve the riveting accuracy. When the pressure head is reset, the fixed block has a tendency to move upward under the influence of the compression spring. The fixed block and the pressure head are fixed together, which can facilitate the reset of the pressure head and make the separation of the riveting protrusion under the pressure head and the end cover faster.

[0010] Preferably, the limiting structure includes an upper limit block arranged on the inner wall of the pressing sleeve and a lower limit protrusion arranged on the pressing head, the upper end of the inner wall of the pressing sleeve extends circumferentially inward to form the upper limit block, and the lower limit block located at the lower side of the upper limit block to support the upper limit block is arranged at the position where the pressing head deviates from the upper end. The above arrangement is to prevent the pressing head and the pressing sleeve from being separated from each other.

[0011] Preferably, the inner wall of the press sleeve extends circumferentially inward to form the upper limit block in the shape of an annular shape, and the circumferential outer wall of the pressure head extends circumferentially outward to form the lower limit block. The outer edge of the cross section of the lower limit block is the same shape as the inner edge of the cross section of the press sleeve where it deviates from the upper limit block and is both circular. The upper limit block is annular to increase the contact area between the upper limit block and the lower limit block to improve the anti-slip effect. The inner edge of the cross section of the press sleeve is the same shape as the outer edge of the cross section of the lower limit block to facilitate the up and down sliding of the press sleeve and to make the gap between the press sleeve and the lower limit block smaller, so as to reduce the radial movement distance of the press sleeve.

[0012] Preferably, an external thread structure is provided at the upper end of the circumferential outer wall of the pressure head, the fixing block is annular in cross section and is sleeved and fixed on the circumferential outer side of the pressure head, and an internal thread structure matching the external thread structure is provided on the circumferential inner wall of the fixing block, and the axial length of the external thread structure is greater than the axial length of the internal thread structure. The elastic force of the compression spring can be adjusted by adjusting the upper and lower positions of the fixing block relative to the pressure head.

[0013] The invention has the advantages of being easy to disengage the pressing head from the riveted component, so as to facilitate the resetting of the pressing head. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A schematic diagram of the structure of the convex ring to be riveted of the aluminum end cover before riveting;

[0015] Figure 2 A schematic diagram of the structure of the protrusion to be riveted of the aluminum end cover after riveting;

[0016] Figure 3 It is an exploded schematic diagram of the riveting assembly of the present invention;

[0017] Figure 4 A cross-sectional view of the riveting assembly of the present invention;

[0018] Figure 5 A three-dimensional diagram of the riveting assembly of the present invention;

[0019] Figure 6 for Figure 3 Enlarged view of point A in the middle. DETAILED DESCRIPTION

[0020] The present invention will be further described below based on the accompanying drawings and specific embodiments.

[0021] Depend on Figures 3 to 6 As shown, a riveting device of the present invention includes a press, a riveting assembly 3 is provided at the output end of the press, the riveting assembly 3 includes a pressing head 31, the upper end of the pressing head 31 is connected and fixed to the output end of the press, a plurality of riveting protrusions 32 are provided on the lower side of the pressing head 31, the riveting protrusion 32 includes a lower end face 321 located on the lower side and a side face located on the circumferential side, the lower edges of the side faces are connected to the edges of the lower end faces 321, the side faces include inclined side faces 322, the inclined side faces 322 gradually extend from bottom to top toward the circumferential inner side of the riveting protrusion 32, the plurality of riveting protrusions 32 are annularly spaced with the vertical axis of the pressing head 31 as the center, the inclined side faces 322 include a side face located on the clockwise rotation direction side and a side face on the counterclockwise rotation direction side of the riveting protrusion 32 with the vertical axis of the pressing head 31 as the center, and the inclined side face 322 forms an acute angle with the lower end face 321.

[0022] A compression spring 33 and a pressing sleeve 34 are provided on the circumferential outer side of the pressing head 31. The cross-section of the pressing sleeve 34 is annular. A fixing block 35 is fixed to the upper end of the pressing head 31. The upper end of the compression spring 33 contacts the lower end surface of the fixing block 35, and the lower end of the compression spring 33 contacts the upper end surface of the pressing sleeve 34. A limiting structure is provided between the pressing sleeve 34 and the pressing head 31 to prevent the pressing sleeve 34 from falling away from the pressing head 31. Under the action of the compression spring 33, the plane where the lower end surface of the pressing sleeve 34 is located is below the plane where the lower end surface of the riveting protrusion 32 is located.

[0023] The limiting structure includes an upper limit block 341 arranged on the inner wall of the pressing sleeve 34 and a lower limit protrusion 311 arranged on the pressing head 31. The upper end of the inner wall of the pressing sleeve 34 extends circumferentially inward to form the upper limit block 341. The lower limit block 311 is located at the lower side of the upper limit block 341 to support the upper limit block 341 at the position deviating from the upper end of the pressing head 31. The inner wall of the pressing sleeve 34 extends circumferentially inward to form the upper limit block 341 in an annular shape. The circumferential outer wall of the pressing head 31 extends circumferentially outward to form the lower limit block 311. The outer edge of the cross section of the lower limit block 311 is the same as the inner edge of the cross section of the pressing sleeve 34 at the position deviating from the upper limit block 341 and is both circular.

[0024] An external thread structure 312 is provided at the upper end of the circumferential outer wall of the pressure head 31. The cross-section of the fixing block 35 is annular and is sleeved and fixed on the circumferential outer side of the pressure head 31. The circumferential inner wall of the fixing block 35 is provided with an internal thread structure that matches the external thread structure 312. The axial length of the external thread structure 312 is greater than the axial length of the internal thread structure.

[0025] When the device of the present invention is used, when the riveting protrusion contacts the aluminum end cover for riveting,

[0026] The aluminum material at the riveting point that is located on the inclined side surfaces in the clockwise and counterclockwise directions relative to the riveting protrusion is deformed and extends upward. Due to the setting of the inclined surface, there is less or even no aluminum material that can adhere to the inclined surface, so the reset of the pressure head will be easier, and the pressure head will be more easily detached from the end cover to avoid the end cover being lifted up and broken.

[0027] The invention has the advantages of being easy to disengage the pressing head from the riveted component, so as to facilitate the resetting of the pressing head.

Claims

1. A riveting device, characterized in that A press is included, wherein a riveting assembly is provided at the output end of the press, wherein the riveting assembly includes a press head, wherein the upper end of the press head is connected and fixed to the output end of the press, wherein a plurality of riveting protrusions are provided at the lower side of the press head, wherein the riveting protrusions include a lower end face located at the lower side and a side face located at the circumferential side, wherein the lower edge of the side face is connected to the edge of the lower end face, and part or all of the side faces are gradually extended inwardly from bottom to top in the circumferential direction so that part or all of the side faces are inclined so that an acute angle is formed between the inclined side face and the lower end face; wherein the plurality of riveting protrusions are annularly spaced with the vertical axis of the press head as the center, and the side faces of the riveting protrusions along the clockwise rotation direction with the vertical axis of the press head as the center and along the The side surfaces on the counterclockwise rotation direction are inclined, and the side surfaces along the clockwise rotation direction and the counterclockwise rotation direction of the rivet pressing protrusion form the acute angle with the lower end surface; a compression spring and a pressing sleeve are sleeved on the circumferential outer side of the pressure head, and the cross-section of the pressing sleeve is annular, a fixing block is fixed to the upper end of the pressure head, the upper end of the compression spring contacts the lower end surface of the fixing block, and the lower end of the compression spring contacts the upper end surface of the pressing sleeve, and a limiting structure is provided between the pressing sleeve and the pressure head to cooperate with each other to prevent the pressing sleeve from falling off the pressure head. Under the action of the compression spring, the plane where the lower end surface of the pressing sleeve is located is below the plane where the lower end surface of the rivet pressing protrusion is located.

2. The riveting device according to claim 1, characterized in that The limiting structure includes an upper limit block arranged on the inner wall of the pressing sleeve and a lower limit block arranged on the pressing head. The upper end of the inner wall of the pressing sleeve extends circumferentially inward to form the upper limit block. The lower limit block located at the lower side of the upper limit block to support the upper limit block is provided at the position where the pressing head deviates from the upper end.

3. The riveting device according to claim 2, characterized in that The inner wall of the pressing sleeve extends circumferentially inward to form the annular upper limit block, and the circumferential outer wall of the pressing head extends circumferentially outward to form the lower limit block. The outer edge of the cross-section of the lower limit block has the same shape as the inner edge of the cross-section of the pressing sleeve where it deviates from the upper limit block and both are arranged in a circular shape.

4. The riveting device according to claim 1, characterized in that An external thread structure is provided at the upper end of the circumferential outer wall of the pressure head, the cross-section of the fixed block is annular and is sleeved and fixed on the circumferential outer side of the pressure head, and the circumferential inner wall of the fixed block is provided with an internal thread structure that matches the external thread structure, and the axial length of the external thread structure is greater than the axial length of the internal thread structure.

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