Non-detachable connecting structure

Abstract

The utility model provides a non-detachable connecting structure which comprises a first connecting piece and a second connecting piece and further comprises a first riveting piece and a second riveting piece, and the first connecting piece and the second connecting piece are fixedly connected together through the first riveting piece and the second riveting piece. The first riveting piece penetrates through the first connecting piece and the second connecting piece, the second riveting piece is rotationally mounted in the first riveting piece, a first anti-falling part is arranged on the inner side of the first riveting piece, a second anti-falling part is arranged on the outer side of the second riveting piece, and the first anti-falling part and the second anti-falling part are matched in a concave-convex mode so as to limit axial separation of the second riveting piece and the first riveting piece; the connecting structure has the advantages of being reliable in connection and non-detachable.

Description

Technical Field

[0001] The utility model relates to the technical field of riveting, in particular to a non-detachable connection structure. Background Art

[0002] A rivet is a nail-shaped object with a cap on one end that is used to connect at least two parts or components with through holes. In riveting, the riveted parts are connected by using their own deformation or interference fit. When the rivet connection structure needs to be disassembled, the rivet must be loosened with a screwdriver first, and force is applied evenly on all sides. After the screwdriver loosens the rivet to a gap, it can be easily pulled out by clamping it upwards with needle-nosed pliers, or by using pliers to cut the rivet connecting rod and then pulling it out. However, in some special field equipment, rivets are generally designed to not be pulled out after being connected and fixed. Once pulled out, it will cause safety accidents and property losses.

[0003] There is an urgent need to provide a non-detachable connection structure. Utility Model Content

[0004] The utility model aims to provide a reliable and non-detachable connection structure.

[0005] In order to achieve the above-mentioned purpose, the utility model provides a non-detachable connection structure, including a first connecting member and a second connecting member, and also including a first rivet and a second rivet, the first connecting member and the second connecting member are fixedly connected together by the first rivet and the second rivet; the first rivet passes through the first connecting member and the second connecting member, the second rivet is rotatably installed in the first rivet, a first anti-detachment portion is provided on the inner side of the first rivet, and a second anti-detachment portion is provided on the outer side of the second rivet, the first anti-detachment portion and the second anti-detachment portion are matched in a concave-convex manner to limit the axial separation of the second rivet and the first rivet.

[0006] It can be seen from the above scheme that by arranging the second rivet to be installed in the first rivet, the second anti-detachment portion is matched and connected with the first anti-detachment portion arranged inside the first rivet, which is beneficial to avoid axial separation of the first rivet and the second rivet, and ensures that the first connecting member and the second connecting member are firmly connected together. Since the first anti-detachment portion and the second anti-detachment portion are hidden inside the first rivet, they cannot be forcibly disassembled once they are connected in place.

[0007] A further solution is that a through hole, a threaded hole and an accommodating cavity are sequentially provided on the inner side of the first rivet along its axial direction, both ends of the threaded hole are respectively connected with the through hole and the accommodating cavity, and the first anti-slip portion is arranged in the through hole; a smooth rod portion and a threaded column portion are also provided on the outer side of the second rivet, the second anti-slip portion is arranged at one end of the smooth rod portion away from the threaded column portion, the second anti-slip portion is arranged corresponding to the first anti-slip portion, the smooth rod portion is inserted in the threaded hole, and the threaded column portion is arranged in the accommodating cavity.

[0008] A further solution is that during the process of installing the second rivet member to the first rivet member, the threaded column portion can be threadedly matched with the threaded hole.

[0009] It can be seen from the above scheme that by setting the threaded hole and the threaded column, when the second rivet and the first rivet are connected, the second rivet enters the first rivet in a rotational installation manner. When the two are connected in place, the threaded column passes through the threaded hole into the accommodating cavity, so that the second rivet can move slightly in the axial direction to ensure that the first anti-detachment part and the second anti-detachment part can be correctly connected, avoiding the two from being unable to be installed in place due to manufacturing or assembly errors. Even if the utility model encounters high-intensity and frequent vibrations, the first rivet and the second rivet will not easily detach.

[0010] A further solution is that the first anti-slip part is a card slot, a stop slot wall is arranged on the side of the card slot away from the accommodating cavity, and an inclined slot wall is arranged on the side of the card slot close to the accommodating cavity; the second anti-slip part is a protrusion, a slope and a stop surface are arranged on the protrusion, the protrusion is embedded in the card slot, the slope is adjacent to the inclined slot wall, and the stop surface can abut against the stop slot wall.

[0011] A further solution is that the length of the smooth rod portion is greater than the length of the threaded hole, the length of the threaded column portion is less than the length of the accommodating cavity, and the inner diameter of the accommodating cavity is greater than the major diameter of the threaded column portion.

[0012] A further solution is that the first rivet includes a first body and a first cap, the first body passes through the first connecting member and the second connecting member, the first cap is adjacent to the surface of the first connecting member, and a first tool hole is opened in the center of the first cap; the second rivet includes a second body and a second cap, the second body is inserted into the first body, the second cap is adjacent to the surface of the second connecting member, and a second tool hole is opened in the center of the second cap.

[0013] A further solution is that the first body is provided with at least two through grooves at an end away from the first cap portion, and the through grooves connect the inner and outer sides of the first body, so that at least two elastic swing arms are formed at one end of the first body, and the elastic swing arms can swing elastically along the radial direction of the first body.

[0014] A further solution is that a first avoidance groove is opened on the outer side of the first connecting member, and the first cap is arranged in the first avoidance groove; a second avoidance groove is opened on the outer side of the second connecting member, and the second cap is arranged in the second avoidance groove.

[0015] A further solution is that the non-detachable connection structure also includes a third connecting member, which is connected to the side of the second connecting member facing away from the first connecting member, and the first rivet member passes through the first connecting member, the second connecting member and the third connecting member in sequence, and the second rivet member is inserted into the second rivet member from the side of the third connecting member facing away from the second connecting member.

[0016] A further solution is that a third avoidance groove is formed on a side of the third connecting member facing away from the second connecting member, and the second cap portion is arranged in the third avoidance groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural diagram of an embodiment of the utility model.

[0018] Figure 2 It is an exploded view of an embodiment of the utility model.

[0019] Figure 3 It is a cross-sectional view of an embodiment of the utility model.

[0020] Figure 4 yes Figure 3 Enlarged view of point A in the middle.

[0021] Figure 5 It is a structural diagram of the first riveted part from a first viewing angle in an embodiment of the utility model.

[0022] Figure 6 It is a structural diagram of the first riveted component from a second viewing angle in an embodiment of the utility model.

[0023] Figure 7 It is a structural diagram of the second rivet member from a first viewing angle in an embodiment of the utility model.

[0024] Figure 8 It is a structural diagram of the second rivet member from a second viewing angle in an embodiment of the utility model.

[0025] The present invention will be further described below with reference to the accompanying drawings and embodiments. DETAILED DESCRIPTION

[0026] See also Figures 1 to 8 The embodiment provides a non-detachable connection structure, comprising a first connection member 1, a second connection member 2, a third connection member 3, a first rivet 4 and a second rivet 5, wherein the second connection member 2 is connected between the first connection member 1 and the third connection member 3, and the first connection member 1, the second connection member 2 and the third connection member 3 are fixedly connected together by the first rivet 4 and the second rivet 5. Specifically:

[0027] The first connecting member 1 has a first mounting hole 11 extending therethrough, the second connecting member 2 has a second mounting hole 21 extending therethrough, and the third connecting member 3 has a third mounting hole 31 extending therethrough. The first mounting hole 11, the second mounting hole 21 and the third mounting hole 31 are coaxially arranged and connected.

[0028] The first rivet 4 includes a first main body 41 and a first cap 42. The first cap 42 is arranged at the first end of the first main body 41, and the diameter of the first cap 42 is greater than the diameter of the first main body 41. A first contact surface is formed between the first cap 42 and the first main body 41. The first contact surface is adjacent to the surface of the first connector 1, preferably abutting. In order to prevent the first cap 42 from protruding from the surface of the first connector 1, a first avoidance groove 12 can be provided on the outer side of the first connector 1. The diameter of the first avoidance groove 12 is slightly greater than the diameter of the first cap 42, and the first cap 42 is provided in the first avoidance groove 12. A first tool hole 43 for inserting an installation tool is provided in the center of the first cap 42. The first tool hole 43 can be set to a hexagonal, plum blossom, cross or straight shape. The second end of the first main body 41 passes through the first connector 1, the second connector 2 and the third connector 3 in sequence, and the second end of the first main body 41 is flush with the surface of the third connector 3 or slightly recessed in the outer surface of the third connector 3.

[0029] The second rivet 5 includes a second main body 51 and a second cap 52, the second cap 52 is arranged on the first end of the second main body 51, and the diameter of the second cap 52 is larger than the diameter of the second main body 51, and a second contact surface is formed between the second cap 52 and the second main body 51. The second contact surface is adjacent to the surface of the second connector 2, preferably abutting. In order to prevent the second cap 52 from protruding from the surface of the third connector 3, a third avoidance groove 32 can be provided on the outer side of the third connector 3, the diameter of the third avoidance groove 32 is slightly larger than the diameter of the second cap 52, and the second cap 52 is arranged in the third avoidance groove 32. A second tool hole 53 for inserting an installation tool is provided in the center of the second cap 52, and the second tool hole 53 can be set to a hexagonal, plum blossom, cross or straight shape. The second end of the second main body 51 is inserted into the first main body 41. During the installation process, the second rivet 5 is inserted into the first rivet 4 while rotating.

[0030] A through hole, a threaded hole 45 and an accommodating cavity 46 are sequentially arranged on the inner side of the first rivet 4 along its own axial direction. Both ends of the threaded hole 45 are connected to the through hole and the accommodating cavity 46 respectively. A first anti-slip portion 44 is arranged in the through hole.

[0031] The second rivet 5 is provided with a second anti-slip portion 54, a polished rod portion 55 and a threaded column portion 56 in sequence along its own axial direction on the outside. The polished rod portion 55 is arranged between the second anti-slip portion 54 and the threaded column portion 56, the length of the polished rod portion 55 is greater than the length of the threaded hole 45, the length of the threaded column portion 56 is less than the length of the accommodating cavity 46, and the inner diameter of the accommodating cavity 46 is greater than the major diameter of the threaded column portion 56. When the second rivet 5 and the first rivet 4 are installed in place, the first anti-slip portion 44 and the second anti-slip portion 54 are connected in a concave-convex manner to limit the axial separation of the second rivet 5 and the first rivet 4. At this time, the polished rod portion 55 is inserted into the threaded hole 45, and the threaded column portion 56 is arranged in the accommodating cavity 46. When the second rivet 5 is installed on the first rivet 4, the threaded column 56 is threadedly matched with the threaded hole 45 after passing through the through hole. Thereafter, it rotates and penetrates deeper until the threaded column 56 is separated from the threaded hole 45. At this time, the threaded column 56 is arranged in the accommodating cavity 46. Since the threaded column 56 is not in direct contact with the threaded hole 45, the second rivet 5 can fine-tune its position along its axial direction to ensure that the first anti-detachment portion 44 is matched and connected with the second anti-detachment portion 54.

[0032] exist Figure 4 In the figure, the first anti-slip portion 44 is a groove that is approximately "V" in shape, and the groove extends along the circumference of the first rivet. A stop groove wall 441 is provided on the side of the groove away from the accommodating cavity 46, and the stop groove wall 441 extends radially of the first main body 41. The groove is provided with an inclined groove wall 442 on the side close to the accommodating cavity 46, and the inclined groove wall 442 extends obliquely along the axial direction of the first main body 41.

[0033] Correspondingly, the second anti-slip portion 54 is a protrusion, which can extend along the circumference of the second riveted member to form a ring, or a plurality of protrusions can be provided, and the plurality of protrusions are arranged along the circumference of the second riveted member. The cross-sectional shape of the protrusion matches the shape of the slot. The protrusion is provided with an inclined surface 541 and a stop surface 542, the stop surface 542 extends along the radial direction of the second body 51, and the inclined surface 541 extends along the axial direction of the second body 51. The protrusion is embedded in the slot, the inclined surface 541 is adjacent to the inclined groove wall 442, and the stop surface 542 can abut against the stop groove wall 441 to limit the second riveted member 5 from being separated from the first riveted member 4 in the axial direction. Due to the provision of the inclined surface 541 and the inclined groove wall 442, during the process of the second riveted member 5 being installed to the first riveted member 4, the inclined groove wall 442 slides relative to the inclined surface 541 until the second anti-slip portion 54 is embedded in the first anti-slip portion 44.

[0034] In other embodiments, the first anti-detachment portion may be a protrusion, and the second anti-detachment portion may be a slot, and the protrusion and the slot may cooperate with each other in a concave-convex manner to achieve a fixed connection between the two.

[0035] In order to further improve the anti-slipping ability of the first rivet 4 and the second rivet 5, the number of the first anti-slipping parts 44 of this embodiment is set to be multiple. This embodiment takes three first anti-slipping parts 44 as an example. The three first anti-slipping parts 44 are arranged along the axial direction of the first rivet 4 and are evenly spaced. The number of the second anti-slipping parts 54 is equal to the number of the first anti-slipping parts 44, and the second anti-slipping parts 54 are arranged one-to-one with the first anti-slipping parts 44; or the number of the second anti-slipping parts 54 is greater than the number of the first anti-slipping parts 44, and each first anti-slipping part 44 corresponds to at least one second anti-slipping part 54. This embodiment is preferably the former.

[0036] See also Figure 5 and Figure 6 The first body 41 is provided with at least two through grooves 47 at one end away from the first cap portion 42. The through grooves 47 connect the inner and outer sides of the first body 41, so that at least two elastic swing arms 48 are formed at one end of the first body 41. The elastic swing arms 48 can swing elastically along the radial direction of the first body 41. When the second anti-slip portion 54 moves toward the first anti-slip portion 44, the inclined surface 541 abuts against the inclined groove wall 442 and pushes the elastic swing arm 48 outward, so that the second anti-slip portion 54 can be smoothly embedded in the card slot. At this time, the force pushing the elastic swing arm 48 outward disappears, and the elastic swing arm 48 returns to its initial position, ensuring that the stop groove wall 441 and the stop surface 542 are opposite in the axial direction, which plays a role in limiting the disengagement.

[0037] In other embodiments, the first rivet and the second rivet can connect the first connector and the second connector together, and the third connector may not be used in this structure. In this case, the first rivet passes through the first connector and the second connector, and the second rivet is rotated from the outside of the second connector to the inside of the first rivet, so that the four are fixedly connected.

[0038] In order to prevent the second rivet from protruding from the surface of the second connecting member, a second avoidance groove is opened on the outer side of the second connecting member. The second avoidance groove is slightly larger than the diameter of the second cap portion, and the second cap portion is arranged in the second avoidance groove.

[0039] In summary, the utility model arranges the second rivet to be installed in the first rivet, so that the second anti-detachment portion is cooperated and connected with the first anti-detachment portion arranged inside the first rivet, which is beneficial to avoid axial separation of the first rivet and the second rivet, and ensures that the first connecting member and the second connecting member are firmly connected together. Since the first anti-detachment portion and the second anti-detachment portion are hidden inside the first rivet, they cannot be forcibly disassembled once they are connected in place.

[0040] Finally, it should be emphasized that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various changes and modifications. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A non-detachable connection structure, comprising a first connection member and a second connection member, characterized in that: It also includes a first rivet and a second rivet, wherein the first connecting member and the second connecting member are fixedly connected together by the first rivet and the second rivet; The first rivet passes through the first connecting member and the second connecting member, the second rivet is rotatably installed in the first rivet, a first anti-slip portion is provided on the inner side of the first rivet, and a second anti-slip portion is provided on the outer side of the second rivet, the first anti-slip portion and the second anti-slip portion are matched in a concave-convex manner to limit the axial separation of the second rivet and the first rivet.

2. The non-detachable connection structure according to claim 1, characterized in that: A through hole, a threaded hole and a receiving cavity are sequentially arranged on the inner side of the first rivet along its axial direction, two ends of the threaded hole are respectively connected with the through hole and the receiving cavity, and the first anti-detachment portion is arranged in the through hole; A smooth rod portion and a threaded column portion are also provided on the outside of the second rivet part. The second anti-slip portion is provided at an end of the smooth rod portion away from the threaded column portion. The second anti-slip portion is provided corresponding to the first anti-slip portion. The smooth rod portion is inserted into the threaded hole, and the threaded column portion is provided in the accommodating cavity.

3. The non-detachable connection structure according to claim 2, characterized in that: During the process of installing the second rivet component to the first rivet component, the threaded column portion can be threadedly engaged with the threaded hole.

4. The non-detachable connection structure according to claim 2, characterized in that: The first anti-slip portion is a card slot, and a stop slot wall is provided on a side of the card slot away from the accommodating cavity, and an inclined slot wall is provided on a side of the card slot close to the accommodating cavity; The second anti-slip portion is a protrusion, and a slope and a stop surface are arranged on the protrusion. The protrusion is embedded in the slot, the slope is adjacent to the inclined slot wall, and the stop surface can abut against the stop slot wall.

5. The non-detachable connection structure according to claim 2, characterized in that: The length of the smooth rod portion is greater than the length of the threaded hole, the length of the threaded column portion is less than the length of the accommodating cavity, and the inner diameter of the accommodating cavity is greater than the major diameter of the threaded column portion.

6. The non-detachable connection structure according to any one of claims 1 to 5, characterized in that: The first rivet comprises a first body and a first cap, the first body passes through the first connector and the second connector, the first cap is adjacent to the surface of the first connector, and a first tool hole is opened at the center of the first cap; The second rivet comprises a second main body and a second cap. The second main body is inserted into the first main body. The second cap is adjacent to the surface of the second connector. A second tool hole is formed at the center of the second cap.

7. The non-detachable connection structure according to claim 6, characterized in that: The first body is provided with at least two through grooves at one end away from the first cap portion, and the through grooves connect the inner and outer sides of the first body, so that at least two elastic swing arms are formed at one end of the first body, and the elastic swing arms can swing elastically along the radial direction of the first body.

8. The non-detachable connection structure according to claim 6, characterized in that: A first avoidance groove is formed on the outer side of the first connecting member, and the first cap portion is arranged in the first avoidance groove; A second avoidance groove is formed on the outer side of the second connecting member, and the second cap portion is arranged in the second avoidance groove.

9. The non-detachable connection structure according to claim 6, characterized in that: The non-detachable connection structure also includes a third connecting member, which is connected to the side of the second connecting member facing away from the first connecting member, the first rivet passes through the first connecting member, the second connecting member and the third connecting member in sequence, and the second rivet is inserted into the second rivet from the side of the third connecting member facing away from the second connecting member.

10. The non-detachable connection structure according to claim 9, characterized in that: A third avoidance groove is formed on a side of the third connecting member facing away from the second connecting member, and the second cap portion is arranged in the third avoidance groove.

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