Bolt limiting structure

Abstract

A bolt limiting structure belongs to the technical field of bolt fastening and comprises a bolt portion and a fixing portion, the bolt portion comprises a screw rod and a bolt gasket, a bolt head is arranged at the top end of the screw rod, the bottom face of the bolt head is connected with the bolt gasket arranged on the screw rod in a sleeved mode, and the bolt gasket is connected with the fixing portion. At least one limiting fin is arranged on the periphery of the bolt gasket; the fixing part comprises a welding panel, the welding panel is provided with a bolt through hole allowing the screw to penetrate through, the welding panel is further provided with a folded edge which is folded upwards and then extends towards one side, and an elastic piece is arranged on the portion, below the folded edge, of the welding panel. The folded edge extends towards one side, the hollow part is formed between the folded edge and the welding panel, the elastic piece is located in the hollow part and matched with the folded edge, after the limiting fin is installed between the elastic piece and the folded edge, the screw rod is matched with the nut to complete installation and fixation, and the limiting fin is beneficial to preventing the screw rod from loosening in the axial direction and the circumferential direction; therefore, the bolt is prevented from falling off.

Description

Technical Field

[0001] The utility model belongs to the technical field of bolt fastening, in particular to a bolt limiting structure. Background Art

[0002] In the field of vehicle component connection and fastening, bolts are passed through a larger sheet metal plane and nuts are assembled from the other side, such as the installation of body suspension buffer blocks. The body connection suspension buffer blocks are mainly used to connect the body and the frame, and play a role in buffering and shock absorption in the whole vehicle.

[0003] Generally, the connection of the body suspension requires the connection bolts and locking nuts to tightly connect the body and the frame. When assembling this structure, it usually requires two people to cooperate in the construction, one person to fix the bolt tightening part on the top, and the other person to assemble the parts and tighten the nuts on the other side of the sheet metal.

[0004] In the absence of a corresponding bolt anti-rotation structure, two operators are required to cooperate and operate simultaneously when the connecting bolt and the locking nut are connected, which is labor-intensive and time-consuming during assembly and has low work efficiency.

[0005] A Chinese patent (publication number CN220101768U) discloses an anti-rotation bracket and anti-rotation bolt assembly, which can limit the bolt during rotation. However, when the nut is tightened on the other side, the bolt may fall out, which is not conducive to assembly. In the later use process, the bolt is prone to fall out due to lack of limitation. Utility Model Content

[0006] In order to solve the problems in the prior art that bolt assembly operation is inconvenient and bolts are easily disengaged during subsequent use, the utility model provides a bolt limiting structure.

[0007] The utility model is realized by the following technical solutions:

[0008] A bolt limiting structure comprises a bolt part and a fixing part, wherein the bolt part comprises a screw rod and a bolt washer, the top end of the screw rod is provided with a bolt head, the bottom surface of the bolt head is connected with the bolt washer sleeved on the screw rod, and at least one limiting fin is provided on the outer periphery of the bolt washer; the fixing part comprises a welding panel, the welding panel is provided with a bolt through hole allowing the screw rod to pass through, the welding panel is also provided with a folded edge folded upward and extending to one side, and the welding panel below the folded edge is provided with a spring sheet, the spring sheet cooperates with the folded edge to limit the axial rotation of the limiting fin.

[0009] The hemming extends to one side and forms a hollowed-out part with the welding panel. The elastic piece is located within this hollowed-out part. The elastic piece cooperates with the hemming. After installing the limiting fin between the elastic piece and the hemming, the screw cooperates with the nut to complete the installation and fixation. The limiting fin helps prevent the screw from loosening axially and circumferentially, thereby avoiding the situation of the bolt coming out.

[0010] A further improvement of the present utility model is that the above two limiting fins are arranged axially symmetrically on the bolt gasket; the extending directions of the two hemmings are opposite. This helps the limiting fin to rotate into the hollowed-out part between the hemming and the elastic piece for fixation, thereby improving the fixation effect on the limiting fin.

[0011] A further improvement of the present utility model is that the above hemming is integrally L-shaped, and the elastic piece is inclined and convex upward toward the side of the hemming. The inclined elastic piece provides guidance when the limiting fin enters the hollowed-out part.

[0012] A further improvement of the present utility model is that the bottom surface part of the hemming extending toward the elastic piece is the lower end surface of the hemming; the end surface of the elastic piece close to the root of the hemming is the limiting end surface of the elastic piece; the upper edge in the length direction of the limiting fin is the upper line of the limiting structure, and the lower edge in the length direction is the lower line of the limiting structure.

[0013] A further improvement of the present utility model is that the width direction of the above limiting fin is K, the projected distance on the welding panel from the limiting end surface of the elastic piece to the root of the hemming is L, and L>K. This size setting provides a accommodation space for the limiting fin.

[0014] A further improvement of the present utility model is that the vertical distance from the front end surface of the hemming to the welding panel is E, the distance between the upper line and the lower line of the limiting structure is T, and E>T.

[0015] A further improvement of the present utility model is that the vertical distance from the front end surface of the hemming to the limiting end surface of the elastic piece is H, and E>T>H. By squeezing the elastic piece, the limiting fin can finally enter the limiting space between the hemming and the elastic piece, and helps prevent the limiting fin from extruding the elastic piece reversely and coming out.

[0016] A further improvement of the present utility model is that the distance between the two hemmings is A, and the distance between the opposite end surfaces of the two limiting fins is B, and B>A.

[0017] A further improvement of the present utility model is that the bolt gasket and the bolt head are fixedly connected by cold heading or resistance welding. This improves the firmness between the bolt gasket and the bolt head.

[0018] A further improvement of the present utility model is that a bolt flange is fixedly connected between the bolt head and the bolt gasket, which helps to increase the contact force-bearing area between the bolt head and the bolt gasket.

[0019] As can be seen from the above technical solutions, the beneficial effects of the present utility model are as follows: By extending the hem to one side and forming a hollow part between the hem and the welding panel, the elastic piece is located within the hollow part. The elastic piece and the hem cooperate with each other. After installing the limiting fin between the elastic piece and the hem, the screw cooperates with the nut to complete the installation and fixation. The limiting fin helps to prevent the screw from loosening axially and circumferentially, thereby avoiding the situation of the bolt coming out. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the present utility model, the drawings required for description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0021] Figure 1 It is a schematic structural diagram of the prior art.

[0022] Figure 2 It is the first schematic structural diagram of the specific embodiment of the present utility model.

[0023] Figure 3 It is the second schematic structural diagram of the specific embodiment of the present utility model.

[0024] Figure 4 It is the schematic diagram of the fixed part of the specific embodiment of the present utility model.

[0025] Figure 5 It is the schematic diagram of the bolt part of the specific embodiment of the present utility model.

[0026] In the drawings: 1. Fixed part; 101. Hem; 1011. Lower end face of the hem; 1012. Front end face of the hem; 102. Elastic piece; 1021. Limiting end face of the elastic piece; 103. Bolt through hole; 104. Welding panel; 2. Bolt part; 201. Bolt gasket; 202. Bolt flange; 203. Screw; 204. Limiting fin; 2041. Upper side line of the limiting structure; 2042. Lower side line of the limiting structure; 205. Bolt head. SPECIFIC EMBODIMENTS

[0027] To make the objectives, features, and advantages of the present utility model more obvious and understandable, the technical solutions in the present utility model will be clearly and completely described below with reference to the accompanying drawings in the specific embodiments. Obviously, the embodiments described below are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in this patent, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of this patent.

[0028] As shown in the accompanying drawings, a bolt limiting structure includes a bolt part 2 and a fixing part 1. The bolt part 2 includes a screw rod 203 and a bolt gasket 201. A bolt head 205 is provided at the top end of the screw rod 203. The bolt gasket 201 sleeved on the screw rod 203 is connected to the bottom surface of the bolt head 205. The bolt gasket 201 and the bolt head 205 are fixedly connected by cold heading or resistance welding to enhance the firmness between the bolt gasket 201 and the bolt head 205. A bolt flange 202 is fixedly connected between the bolt head 205 and the bolt gasket 201, which helps to increase the contact stress area between the bolt head 205 and the bolt gasket 201.

[0029] Two limiting fins 204 are provided on the outer periphery of the bolt gasket 201. The two limiting fins 204 are symmetrically arranged on the bolt gasket 201, that is, the two limiting fins 204 are extended on the diameter line of the screw rod 203.

[0030] The upper edge in the length direction of the limiting fin 204 is the upper limit line 2041 of the limiting structure, and the lower edge in the length direction is the lower limit line 2042 of the limiting structure. The width direction of the limiting fin 204 is K, the distance between the upper limit line 2041 and the lower limit line 2042 of the limiting structure is T, and the distance between the opposite end faces of the two limiting fins 204 is B.

[0031] The fixing part 1 includes a welding panel 104. A bolt through hole 103 allowing the screw rod 203 to pass through is provided on the welding panel 104. The welding panel 104 is also provided with a folded edge 101 that is folded upward and extends to one side. A spring piece 102 is provided on the welding panel 104 below the folded edge 101. The spring piece 102 and the folded edge 101 cooperate to limit the axial rotation of the limiting fin 204. By extending the folded edge 101 to one side and forming a hollow part between the folded edge 101 and the welding panel 104, the spring piece 102 is located in the hollow part. The spring piece 102 and the folded edge 101 cooperate with each other. After the limiting fin 204 is installed between the spring piece 102 and the folded edge 101, the screw rod 203 is installed and fixed with a nut. The limiting fin 204 helps to prevent the screw rod 203 from loosening in the axial and circumferential directions, thereby avoiding the situation of the bolt coming out.

[0032] The hemming 101 is generally L-shaped as a whole, and the extending directions of the two hemmings 101 are opposite. This helps the limiting fin 204 to rotate into the hollow part between the hemming 101 and the elastic piece 102 for fixation, thereby improving the fixation effect on the limiting fin 204. The elastic piece 102 is inclined and convex upward toward the side of the hemming 101. The inclined elastic piece 102 provides guidance when the limiting fin 204 enters the hollow part.

[0033] The bottom surface part of the hemming 101 extending toward the elastic piece 102 is the lower end surface 1011 of the hemming. One end of the lower end surface 1011 of the hemming away from the root of the hemming 101 is provided with a front end surface 1012 of the hemming in a chamfer structure; the end surface of the elastic piece 102 close to the root of the hemming 101 is the limiting end surface 1021 of the elastic piece; the projected distance between the limiting end surface 1021 of the elastic piece and the root of the hemming 101 on the welding panel 104 is L, the vertical distance between the front end surface 1012 of the hemming and the welding panel 104 is E, the vertical distance between the front end surface 1012 of the hemming and the limiting end surface 1021 of the elastic piece is H, and the distance between the two hemmings 101 is A.

[0034] Among them, L>K, and the setting of this dimension provides a receiving space for the limiting fin 204.

[0035] Among them, E>T>H. By squeezing the elastic piece 102, the limiting fin 204 can finally enter the limiting space between the hemming 101 and the elastic piece 102, and it helps to prevent the limiting fin 204 from being extruded reversely by the elastic piece 102 and coming out.

[0036] Among them, B>A, ensuring that the limiting fin 204 has enough length to contact the root of the hemming 101 and the elastic piece 102.

[0037] In summary, the usage method of this device: Pass the screw 203 through the bolt through-hole 103, and by screwing the bolt head 205 counterclockwise, the action will cause the limiting fin 204 to rotate simultaneously, that is, trigger the action And because the dimension T> the dimension H, when the lower edge line 2042 of the limiting structure contacts the elastic piece 102, it will cause the elastic piece 102 to generate an action At the same time, the limiting structure will have an upward movement tendency, that is, the action

[0038] It should be noted that during the action process, since the bolt part 2 is lifted, when the upper edge line 2041 of the limiting structure first contacts the lower end surface 1011 of the hemming, in the projection on the welding panel 104, the upper edge line 2041 of the limiting structure should intersect with the projection of the lower end surface 1011 of the hemming, that is, the lower end surface 1011 of the hemming should have enough length to cover the upper edge line 2041 of the limiting structure to prevent the bolt part 2 from rising further.

[0039] When the lower edges 2042 of the two limit structures completely cross the limiting end face 1021 of the elastic piece, the placement of the bolt part 2 is completed.

[0040] After the placement of the bolt part 2 is completed, under normal conditions of the structure of the present invention, no failures such as displacement and falling off will occur (hereinafter referred to as failures).

[0041] The principle is as follows: When the action and the action appear in superposition, it is the most severe working condition. Due to the blocking and lifting effects of the elastic piece 102102, the limiting fin 204 cannot move forward any further, and the

[0042] action

[0043] is blocked. At the same time, since the limiting fin on the other side is longer and is not beyond the control of the folding edge 101 on the other side, with dimension T > dimension H and dimension B > dimension A, the final effect is that the bolt part 2 is controlled within the fixed part 1 and no failure will occur.

[0044] In this specification, each embodiment is described in a progressive manner. The key point of each embodiment is to illustrate the differences from other embodiments. For the same or similar parts among the embodiments, reference can be made to each other.

[0045] Terms such as "upper", "lower", "outer side", "inner side", etc. in the specification, claims and above-mentioned drawings of the present invention, if any, are used to distinguish the relative positions and do not need to be qualitatively defined. It should be understood that such used data can be interchanged under appropriate circumstances so that the embodiments of the present invention described here can be implemented in an order other than those illustrated or described here. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion.

[0046] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present utility model. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present utility model. Therefore, the present utility model will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A bolt limiting structure, comprising a bolt portion (2) and a fixing portion (1), characterized in that: The bolt portion (2) comprises a screw rod (203) and a bolt washer (201); a bolt head (205) is provided at the top end of the screw rod (203); the bolt washer (201) sleeved on the screw rod (203) is connected to the bottom surface of the bolt head (205); and at least one limiting fin (204) is provided on the outer periphery of the bolt washer (201); the fixing portion (1) comprises a welding panel (104); a bolt through hole (103) is provided on the welding panel (104) for allowing the screw rod (203) to pass through; a folded edge (101) is folded upward and extended to one side on the welding panel (104); and a spring sheet (102) is provided on the welding panel (104) below the folded edge (101); the spring sheet (102) cooperates with the folded edge (101) to limit the rotation of the limiting fin (204) in the axial direction.

2. A bolt limiting structure according to claim 1, characterized in that: Two limiting fins (204) are provided, and the two limiting fins (204) are axially symmetrically arranged on the bolt gasket (201); and the extension directions of the two folded edges (101) are opposite.

3. A bolt limiting structure according to claim 1 or 2, characterized in that: The folded edge (101) is L-shaped as a whole, and the spring piece (102) is inclined toward one side of the folded edge (101) and protrudes upward.

4. A bolt limiting structure according to claim 3, characterized in that: The bottom portion of the folded edge (101) extending toward one side of the spring sheet (102) is divided into a folded edge lower end surface (1011); the end surface of the spring sheet (102) close to the root of the folded edge (101) is a spring sheet limiting end surface (1021); the upper edge of the limiting fin (204) in the length direction is the limiting structure upper edge line (2041), and the lower edge in the length direction is the limiting structure lower edge line (2042).

5. A bolt limiting structure according to claim 4, characterized in that: The width direction of the limiting fin (204) is K, and the projection distance between the limiting end surface (1021) of the spring piece and the root of the folded edge (101) on the welding panel (104) is L, and L>K.

6. A bolt limiting structure according to claim 4, characterized in that: An end of the folded edge lower end surface (1011) away from the root of the folded edge 101 is provided with a folded edge front end surface (1012) in a chamfered structure; the vertical distance between the folded edge front end surface (1012) and the welding panel (104) is E, and the distance between the upper edge line (2041) of the limiting structure and the lower edge line (2042) of the limiting structure is T, and E>T.

7. A bolt limiting structure according to claim 6, characterized in that: The vertical distance between the front end surface (1012) of the folded edge and the spring-piece limiting end surface (1021) is H, and E>T>H.

8. A bolt limiting structure according to claim 4, characterized in that: The distance between the two folded edges (101) is A, the distance between the end faces of the two limiting fins (204) that are separated from each other is B, and B>A.

9. A bolt limiting structure according to claim 4, characterized in that: The bolt gasket (201) and the bolt head (205) are fixedly connected by cold heading or resistance welding.

10. A bolt limiting structure according to claim 9, characterized in that: A bolt flange (202) is fixedly connected between the bolt head (205) and the bolt gasket (201).

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