Riveting tool for wave-shaped retainer

Abstract

A riveting tool for a wave-shaped retainer comprises a riveting device and the retainer arranged in the riveting device for machining, the retainer comprises an upper frame and a lower frame, the upper frame and the lower frame are both provided with abutting connecting parts, the connecting parts are correspondingly provided with riveting holes used for inserting rivets, the riveting device comprises an upper die and a lower die, and the upper die and the lower die are arranged on the upper die. The upper die can move towards the lower die, the upper die and the lower die are respectively provided with an upper riveting part and a lower riveting part corresponding to a riveting hole of the retainer, the upper riveting part is provided with a jacking part corresponding to the riveting hole, and the jacking part has elasticity and is used for positioning a rivet in the riveting hole. The utility model has the beneficial effects that the rivet is positioned by the jacking piece before the riveting action of the rivet is completed, so that the position of the rivet cannot deviate in the riveting hole, and the torque cannot be applied to the retainer in other directions so as to avoid the problem of breakage of the retainer.

Description

Technical Field

[0001] The utility model relates to a riveting tool, in particular to a riveting tool for a wave-shaped retainer. Background Art

[0002] The deep groove ball bearing cage riveting fixture is a specialized tool used to secure the unique wave-shaped cage of deep groove ball bearings during bearing assembly. By riveting, the cage is securely fixed in place, ensuring smooth bearing operation. The fixture provides precise positioning and reliable clamping, preventing the cage from shifting or deforming during the riveting process, thereby safeguarding the bearing's quality and performance.

[0003] Chinese patent document CN106270347B discloses a riveting device, which includes a riveting head for riveting rivets and a first driving device for driving the riveting head to move up and down. The riveting head matches the shape of the upper retainer in the bearing, and a riveting groove is provided on the riveting head. The riveting groove corresponds to the position of the upper retainer for inserting rivets; a first lower die is fixed to the workbench, the first lower die corresponds to the riveting head, and the first lower die matches the shape of the lower retainer.

[0004] The above solution places the upper and lower sides of the retainer on the riveting head and the first lower die of the riveting device, respectively, and then drives the riveting head toward the first lower die to complete the riveting operation. However, the above solution has the following disadvantages: because the rivets placed on the retainer will be offset within the retainer hole before the riveting is completed, these offset rivets will also be offset when the riveting torque generated by the contact with the upper and lower dies, which can easily damage the retainer and cause it to break during use, or even break directly during the riveting process. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a wave-shaped cage riveting tool which reduces the possibility of the cage being broken during the riveting process.

[0006] To achieve the above-mentioned purpose, the technical solution of the present invention is as follows: a wave-shaped retainer riveting tool, comprising a riveting device and a retainer placed in the riveting device for processing, the retainer comprising an upper frame and a lower frame, the upper frame and the lower frame are both provided with connecting parts that abut against each other, and the connecting parts are correspondingly provided with rivet holes for inserting rivets, the riveting device comprises an upper die and a lower die, the upper die can move toward the lower die and the upper die and the lower die are respectively provided with an upper riveting part and a lower riveting part at the rivet holes of the retainer, the upper riveting part is provided with a top pressing piece at the position of the rivet hole, the top pressing piece is elastic and is used to form a positioning for the rivet in the riveted hole.

[0007] The beneficial effects of the present invention are as follows: by providing a pressing piece corresponding to the position of the rivet in the riveting hole and contacting the rivet in advance before the upper riveting part and the lower riveting part contact each other, the pressing piece provides positioning for the rivet before the upper riveting part and the lower riveting part complete the riveting action on the rivet, so that the rivet will not be offset in position in the riveting hole, thereby making the torque applied by the upper riveting part and the lower riveting part act vertically on the rivet, so that the torque will not be applied to the retaining frame in other directions to avoid the problem of retaining frame breakage.

[0008] Furthermore, the upper riveting portion is provided with a placement hole for inserting the top pressing piece, the placement hole includes an elastic section and a positioning section in which an elastic piece is arranged, and the two ends of the elastic piece are respectively fixed on the bottom of the elastic section and the top pressing piece.

[0009] By placing an elastic member within the placement hole of the upper riveting section, the pressing member is stably inserted and effectively positioned. The combined use of the elastic and positioning segments ensures the pressing member is well supported and secured during insertion. The elasticity of the elastic member cushions the impact of the pressing member's insertion, reducing damage to the pressing member and the riveting section. This design also helps improve assembly efficiency and accuracy, ensuring the precise positioning of the pressing member and, consequently, the rivet during the riveting process, enhancing the stability and reliability of the entire riveted structure.

[0010] Furthermore, the cross-section of the positioning section is inclined and the aperture is gradually tapered toward the elastic section; the pressing member includes a guide portion located within the positioning section, the outer surface of the guide portion is adapted to the inner surface of the positioning section, and a connecting hole for inserting the elastic member is provided at the center of the guide portion.

[0011] The inclined cross-section of the positioning section and the tapered aperture toward the elastic section, as well as the matching of the guide portion in the top pressure piece with the inner surface of the positioning section and the connecting hole in the center of the guide portion for the elastic piece to be inserted, together improve the assembly accuracy, ensure the correct positioning of the top pressure piece when it moves toward the bottom of the placement hole, reduce the influence of the aperture tolerance on the positioning rivet of the top pressure piece, thereby improving the production yield, reducing manufacturing costs, and enhancing the stability and durability of the product.

[0012] Furthermore, a guide hole is provided on the lower riveting portion at a position corresponding to the riveting hole, and the guide hole cooperates with the pressing piece to form radial positioning of the rivet.

[0013] A guide hole is provided on the lower riveting section, corresponding to the rivet hole position. This design, in conjunction with the top pressure piece, achieves precise radial positioning of the rivet, thereby improving riveting accuracy, enhancing riveting stability, and increasing production efficiency. This precise positioning also helps ensure that the rivet is evenly stressed during the riveting process, avoiding riveting defects caused by uneven force and ensuring riveting quality. Furthermore, the design of the guide hole makes the riveting process more adaptable to automated production, reducing manual intervention and meeting the needs of modern production lines. As an optimization method, the opening diameter of the guide hole can be made slightly larger than the rivet diameter to provide sufficient deformation space within the guide hole for the rivet to deform.

[0014] Furthermore, the diameter of the guide hole is gradually reduced toward the bottom thereof and the cross section of the guide hole is inclined.

[0015] The guide hole's diameter tapers toward the bottom and its cross-section is angled, enhancing positioning accuracy, structural stability, and riveting quality. This design allows the top pressure piece to fit more tightly against the rivet as it presses into the guide hole, creating radial positioning at both ends of the rivet, reducing deviation during assembly. The angled cross-section also helps disperse stress and reduce stress concentration. Furthermore, the combination of the tapered diameter and angled cross-section reduces assembly force, improving efficiency, and making the design easily adaptable to automated production, minimizing manual intervention and meeting the demands of modern production lines. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a disassembly diagram of an embodiment of the utility model;

[0017] Figure 2 This is an axonometric view of the riveting device according to an embodiment of the present utility model;

[0018] Figure 3 This is a disassembled diagram of the riveting device according to an embodiment of the present utility model;

[0019] Figure 4 This is a partial cross-sectional view of the top pressure piece of an embodiment of the present utility model;

[0020] Figure 5 This is a partial cross-sectional view of the guide hole of an embodiment of the present utility model;

[0021] Figure 6 This is an axonometric view of the retaining frame according to an embodiment of the present invention. DETAILED DESCRIPTION

[0022] The utility model embodiment of a wave type retainer riveting tool is as follows Figure 1-6The figure shows a retainer 2, which includes a riveting device 1 and a retainer 2 placed within the riveting device 1 to complete the riveting. The retainer 2 includes an upper frame 21 and a lower frame 22. The portions of the upper frame 21 and the lower frame 22 for accommodating rolling elements (not shown) are both semicircular and wavy in shape, forming a complete sphere when riveted together. A connecting portion 23 is provided between the semicircular grooves of the upper frame 21 and the lower frame 22 for enclosing the rolling elements (not shown). A rivet hole 24 for rivet placement is provided at the center of the connecting portion 23.

[0023] The riveting device 1 includes an upper mold 11 and a lower mold 12. The upper mold 11 and the lower mold 12 are provided with a wave-shaped pressing surface 13 on the outer surface of the retaining frame 2 corresponding to the upper mold 11 and the lower mold 12, and the outer surface of the wave-shaped pressing surface 13 is also arranged in a wavy shape. An upper riveting part 111 and a lower riveting part 121 are respectively provided at the position of the riveting hole 24 of the retaining frame 2 of the upper mold 11 and the lower mold 12.

[0024] The upper riveting portion 111 is provided with a pressing piece 112 having an outer diameter slightly larger than the outer diameter of the rivet, a placement hole 113 for placing the pressing piece 112, and an elastic piece 114 for providing elasticity to the pressing piece 112, at the position corresponding to the riveting hole 24. The placement hole 113 includes a positioning section 1132 provided near its opening and an elastic section 1131 located at its bottom. The pressing piece 112 includes a cylindrical pressing section and a guide portion 1121 located in the placement hole 113. The outer surface of the guide portion 1121 is adapted to the inner surface of the positioning section 1132. Both are inclined and gradually narrow in width toward the bottom of the placement hole 113. A connecting hole 1122 for placing the elastic piece 114 is provided at the center of the guide portion 1121. The connecting hole 1122 and the elastic section 1131 cooperate to prevent the elastic piece 114 from falling out. As a preferred embodiment, an arc-shaped pressing surface 1124 with an outer diameter roughly equivalent to that of the rivet is provided on the pressing section 1123 toward the rivet hole 24 , and the cross section of the arc-shaped pressing surface 1124 is arc-shaped.

[0025] A guide hole 122 is provided on the lower riveting portion 121 at the location corresponding to the rivet hole 24. The diameter of the guide hole 122 tapers toward its bottom, and the cross-section of the guide hole 122 is inclined. At the bottom of the guide hole 122, the diameter is slightly smaller than the outer diameter of the rivet. During riveting, the guide hole 122 cooperates with the pressing member 122 to position the rivet.

[0026] The following is a brief description of the usage process of this embodiment: the upper frame 21 and the lower frame 22 are placed on the wave-shaped pressing surface 13 of the lower mold 12 and the rivet is passed through the rivet hole 24. At this time, the guide hole 122 can initially position the rivet; in the process of the upper mold 11 pressing downward toward the lower mold 12, the top pressing piece 112 first contacts the rivet. In the process of continuous pressing, the arc-shaped pressing surface 1124, the guide part 1121 and the positioning section 1132 cooperate to continuously correct the rivet position, so that the rivet position is perpendicular to the rivet hole 24 when the upper riveting part 111 and the lower riveting part 121 are closed, so that the rivet will not be offset in position.

[0027] The above embodiment is only one preferred embodiment of the present invention. Common changes and substitutions made by those skilled in the art within the scope of the technical solution of the present invention are all included in the protection scope of the present invention.

Claims

1. A riveting tool for a wave-shaped retainer, comprising a riveting device and a retainer placed in the riveting device for processing, wherein the retainer comprises an upper frame and a lower frame, each of which is provided with abutting connecting portions, each of which has corresponding rivet holes for inserting rivets, and the riveting device comprises an upper die and a lower die, the upper die being movable toward the lower die, and each of which is provided with an upper riveting portion and a lower riveting portion, respectively, at positions corresponding to the rivet holes of the retainer, characterized in that: A pressing piece is provided on the upper riveting portion at a position corresponding to the riveting hole. The pressing piece is elastic and is used to position the rivet in the riveting hole.

2. The wave-shaped retainer riveting tool according to claim 1, characterized in that: The upper riveting portion is provided with a placement hole for the top pressing piece to be placed. The placement hole includes an elastic section and a positioning section in which an elastic piece is arranged. The two ends of the elastic piece are respectively fixed on the bottom of the elastic section and the top pressing piece.

3. The wave-shaped retainer riveting tool according to claim 2, characterized in that: The cross-section of the positioning section is inclined and the aperture is gradually reduced toward the elastic section; the pressing member includes a guide portion located in the positioning section, the outer surface of the guide portion is adapted to the inner surface of the positioning section, and a connecting hole for inserting the elastic member is provided at the center of the guide portion.

4. The wave-shaped retainer riveting tool according to claim 1, characterized in that: A guide hole is provided on the lower riveting portion at a position corresponding to the riveting hole, and the guide hole cooperates with the pressing piece to form radial positioning of the rivet.

5. The wave-shaped retainer riveting tool according to claim 4, characterized in that: The guide hole has a diameter that is gradually reduced toward its bottom, and a cross section of the guide hole is inclined.

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