Anti-falling and anti-rotating bolt structure

Abstract

The utility model discloses an anti-disengagement and anti-rotation bolt structure which comprises a metric thread structure, a first stress column, a second stress column, a riveting cylinder, a filling arc groove, a spline gear ring and a guide angle, and the metric thread structure comprises a first threaded column and a first smooth column. One end of the first threaded column is fixedly connected with one end of the first smooth column; one end of the first stress column is fixedly connected with the other end of the first smooth column; one end of the riveting cylinder is fixedly connected with the other end of the second stress column; one end of the filling arc groove is fixedly connected with the other end of the riveting cylinder; one end of the spline gear ring is fixedly connected with the other end of the filling arc groove; the guide angle is arranged at the end of a key groove in the other end of the spline gear ring. Compared with the prior art, the anti-falling and anti-rotating bolt structure has the advantage of preventing the bolt from falling off and rotating.

Description

TECHNICAL FIELD

[0001] The utility model relates to fastener technical field especially relates to a prevent bolt structure that drops and turns round. BACKGROUND

[0002] The automobile engine structure is compact, and the installation space is small, and many subassemblies need to be fixed on the automobile beam framework through threaded connection.

[0003] Some subassemblies such as automobile anti-lock braking system (ABS) are restricted by the self-volume, and need to be fixed on the vehicle through small contact area with the bolt.

[0004] Therefore, how to provide a prevent bolt structure that drops and turns round, so that it can achieve the technical effect of preventing rotation and falling under small contact area, is a technical problem that the technical personnel in the field urgently need to solve. UTILITY MODEL CONTENTS

[0005] In view of the problems existing in the prior art, the technical problem to be solved by the utility model is to provide a prevent bolt structure that drops and turns round, so that it can achieve the technical effect of preventing rotation and falling under small contact area.

[0006] To achieve the above-mentioned purpose, the utility model provides a prevent bolt structure that drops and turns round, metric screw thread structure, the metric screw thread structure is cylindrical structure, the metric screw thread structure includes first threaded column and first smooth column, the outside wall of first threaded column is threaded structure, the outside wall of first smooth column is smooth structure, one end of first threaded column is fixedly connected with one end of first smooth column, the outer diameter of first threaded column is same with first smooth column;First force column, the first smooth column is located in the center of one end of first force column, one end of first force column is fixedly connected with the other end of first smooth column;Second force column, the second force column is cylindrical structure, the first force column is located in the center of one end of second force column, one end of second force column is fixedly connected with the other end of first force column;Riveting cylinder, the second force column is located in the center of riveting cylinder, one end of riveting cylinder is fixedly connected with the other end of second force column;Fill circular arc groove, the fill circular arc groove is circular arc columnar structure, one end of fill circular arc groove is fixedly connected with the other end of riveting cylinder;Spline gear ring, the spline gear ring is cylindrical structure, one end of spline gear ring is fixedly connected with the other end of fill circular arc groove;Guide angle, the guide angle is arranged in the keyway end head at the other end of spline gear ring.

[0007] In the first aspect, the first force-bearing column comprises: a first pressure-bearing column in a circular truncated cone structure, the first smooth column is located at the center of the upper end surface of the first pressure-bearing column, and the upper end surface of the first pressure-bearing column is fixedly connected with the other end of the first smooth column; a second pressure-bearing column in a cylindrical structure, the lower end surface of the first pressure-bearing column is fixedly connected with one end of the second pressure-bearing column; wherein the other end of the second pressure-bearing column is located at the center of one end of the second force-bearing column, and the one end of the second force-bearing column is fixedly connected with the other end of the second pressure-bearing column.

[0008] In the first aspect, the diameter of the upper end surface of the first pressure-bearing column is 1.5 times the outer diameter of the first smooth column.

[0009] In the first aspect, the diameter of the upper end surface of the first pressure-bearing column is smaller than the diameter of the lower end surface of the first pressure-bearing column; the diameter of the lower end surface of the first pressure-bearing column is the same as the outer diameter of the second pressure-bearing column.

[0010] In the first aspect, the outer diameter of the second force-bearing column is greater than the outer diameter of the second pressure-bearing column; the outer diameter of the second force-bearing column is 1.1-1.3 times the diameter of the upper end surface of the first pressure-bearing column.

[0011] In the first aspect, the outer diameter of the riveting cylinder is smaller than the outer diameter of the second force-bearing column.

[0012] In the first aspect, the diameter of the upper end surface of the filling circular arc groove is greater than the diameter of the lower end surface of the filling circular arc groove; the side wall of the filling circular arc groove is recessed at the central axis of the filling circular arc groove, the included angle between the other end surface of the riveting cylinder and the side wall of the filling circular arc groove in contact is an acute angle; the diameter of the upper end surface of the filling circular arc groove is the same as the outer diameter of the riveting cylinder.

[0013] In the first aspect, the outer diameter of the spline gear ring is greater than the diameter of the lower end surface of the filling circular arc groove; the angle of the guide angle is 16°-30°.

[0014] In the first aspect, the outer diameter of the riveting cylinder and the outer diameter of the spline gear ring are both greater than the inner diameter of the carrier hole.

[0015] In the first aspect, the first threaded column, the first smooth column, the first pressure-bearing column, the second pressure-bearing column, the second force-bearing column, the riveting cylinder, the filling circular arc groove, the spline gear ring and the guide angle are integrally formed.

[0016] Beneficial effects:

[0017] The utility model discloses a kind of anti-drop anti-rotation bolt structures including standard metric thread structure, first stress column, second stress column, riveting cylinder, filling circular arc groove, spline gear ring and guide angle, wherein, the first threaded column of metric thread structure is matched with standard nut, for being connected with nut, it can be fixed on whole vehicle frame, to fix the component of metric thread structure and metric thread structure lower part in automobile engine compartment;First stress column mainly includes first pressure-bearing column and second pressure-bearing column, the surface not covered by first smooth column in the upper end surface of first pressure-bearing column is first step stress surface, first step stress surface is used to bear vertical pressure, under the action of vertical force, the component of second stress column lower part is pressed into the carrier hole needing to be fixed, carrier hole can be directly processed into round hole;The surface not covered by second pressure-bearing column in the end surface of one end of second stress column is second step stress surface, and the second step stress surface is used to dilute the pressure of external hanging carrier in vertical direction, external hanging carrier is the structure supported by first step stress surface by passing through metric thread structure, supported by second step stress surface by passing through first stress column, second step stress surface contacts with external hanging carrier, and the pressure in vertical direction can be reduced by increasing contact area, to avoid damaging the rough surface of external hanging carrier;From guide angle, insert carrier hole, spline gear ring, filling circular arc groove and riveting cylinder enter carrier hole in pressing process, in the process that riveting cylinder is pressed into the carrier hole of carrier, the acute angle between riveting cylinder and filling circular arc groove is forced to displace carrier material, and completely filled into the recess structure of filling circular arc groove, permanent local filling is formed, to prevent the problem of separation from carrier caused by bolt drop, and the carrier can be fastened spare part, then spline gear ring is pressed into carrier through interference fit through carrier hole, since it is keyway cooperation, bolt and carrier hole can be effectively prevented from axial rotation, so that spline gear ring, filling circular arc groove and riveting cylinder are assembled into a firm whole with carrier, if tightening torque test is carried out on actual assembly part, when the first threaded column of metric thread structure and nut are tightened enough, the thread at the upper part of first threaded column is first damaged and fractured, but the bottom does not rotate with the contact position of carrier;In addition, the overall length of riveting cylinder, filling circular arc groove, spline gear ring and guide angle does not need to be too large, and the outer diameter does not need to be too large, in the case that the overall length of riveting cylinder, filling circular arc groove, spline gear ring and guide angle is small and the outer diameter is small, bolt anti-drop and anti-rotation function can be realized through short contact surface;Guide angle can facilitate subsequent spline gear ring, filling circular arc groove and riveting cylinder to be pressed into carrier, to play the role of auxiliary guide.As can be seen from the above, the spline tooth ring, the filling circular arc groove and the riveting cylinder are assembled into a firm whole, then the firm whole is fixed on the vehicle through the metric screw thread structure and the matched nut, so that the bolt of the anti-falling and anti-rotating bolt structure is prevented from falling off and rotating, in addition, the anti-falling and anti-rotating bolt structure has the advantages of simple structure, convenient use, good fastening effect and long service life. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0019] Fig. 1 is a front view of the overall structure of the anti-falling and anti-rotating bolt structure of the present application.

[0020] Fig. 2 is a front view of the anti-falling and anti-rotating bolt structure of the present application.

[0021] Fig. 3 is a side view of the overall structure of the anti-falling and anti-rotating bolt structure of the present application.

[0022] Reference signs:

[0023] 1, metric screw thread structure; 11, first threaded column; 12, first smooth column; 2, first stress column; 21, first pressure-bearing column; 22, second pressure-bearing column; 3, second stress column; 4, riveting cylinder; 5, filling circular arc groove; 6, spline tooth ring; 7, guide angle. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art belong to the scope of protection of the present application.

[0025] Embodiment one

[0026] As Figs. 1-3The embodiment one provides a bolt structure for preventing loosening and rotation, which comprises a metric thread structure 1 in a cylindrical structure, the metric thread structure 1 comprising a first threaded column 11 and a first smooth column 12, the outer side wall of the first threaded column 11 being in a threaded structure, the outer side wall of the first smooth column 12 being in a smooth structure, one end of the first threaded column 11 being fixedly connected with one end of the first smooth column 12, and the outer diameter of the first threaded column 11 being the same as that of the first smooth column 12; a first force column 2, the first smooth column 12 being located at the center of one end of the first force column 2, and one end of the first force column 2 being fixedly connected with the other end of the first smooth column 12; a second force column 3 in a cylindrical structure, the first force column 2 being located at the center of one end of the second force column 3, and one end of the second force column 3 being fixedly connected with the other end of the first force column 2; a riveting cylindrical body 4, the second force column 3 being located at the center of the riveting cylindrical body 4, and one end of the riveting cylindrical body 4 being fixedly connected with the other end of the second force column 3; a filling circular-arc groove 5 in a circular-arc columnar structure, one end of the filling circular-arc groove 5 being fixedly connected with the other end of the riveting cylindrical body 4; a spline gear ring 6 in a cylindrical structure, one end of the spline gear ring 6 being fixedly connected with the other end of the filling circular-arc groove 5; and a guide angle 7 arranged at the key groove end head of the other end of the spline gear ring 6.

[0027] The utility model discloses a kind of anti-escape anti-rotation bolt structures including standard metric thread structure 1, first stress column 2, second stress column 3, riveting cylinder 4, filling circular arc groove 5, spline gear ring 6 and guide angle 7, wherein, the first thread column 11 of metric thread structure 1 is equipped with standard nut, for being connected with nut, it can be fixed on whole vehicle frame, to with metric thread structure 1 and the component in the lower part of metric thread structure is fixed in the engine compartment of car;First stress column 2 mainly includes first pressure-bearing column 21 and second pressure-bearing column 22, the surface not being covered by first smooth column 11 in the upper end surface of first pressure-bearing column 21 is first step stress surface, first step stress surface is used to bear vertical pressure, under the action of vertical force, the component of second stress column 3 lower part is pressed into the carrier hole needing to be fixed, carrier hole can be directly processed into round hole;The surface not being covered by second pressure-bearing column 22 in the end surface of one end of second stress column 3 is second step stress surface, the second step stress surface is used to dilute the pressure of external hanging carrier in vertical direction, external hanging carrier is the structure supported by first step stress surface through metric thread structure 1, supported by second step stress surface through first stress column 2, second step stress surface contacts with external hanging carrier, can reduce the pressure in vertical direction by increasing contact area, avoid to cause damage to the interface of external hanging carrier;From guide angle 7, insert carrier hole, during pressing down, spline gear ring 6, filling circular arc groove 5 and riveting cylinder 4 enter carrier hole, in the process that riveting cylinder 4 is pressed into the carrier hole of carrier, the acute angle between riveting cylinder 4 and filling circular arc groove 5 is forced to make the displacement of carrier material, and completely filled into the recess structure of filling circular arc groove 5, form permanent local filling, prevent the problem of separation with carrier caused by bolt falling, the carrier can be fastening spare part, then spline gear ring 6 is pressed into carrier through interference fit through carrier hole, since it is keyway cooperation, bolt and carrier hole can be effectively prevented from axial rotation, so that spline gear ring 6, filling circular arc groove 5 and riveting cylinder 4 and carrier are assembled into a firm whole, if tightening torque test is carried out to actual assembly part, when the first thread column 11 of metric thread structure 1 and nut are enough big, the thread at the upper part of first thread column 11 is broken first, but the contact position of spline gear ring 6 and carrier does not rotate;In addition, the overall length of riveting cylinder 4, filling circular arc groove 5, spline gear ring 6 and guide angle 7 does not need to be too large, and the outer diameter does not need to be too large, in the case that the overall length of riveting cylinder 4, filling circular arc groove 5, spline gear ring 6 and guide angle 7 is small and the outer diameter is small, short contact surface can be realized to realize the function of bolt anti-falling and anti-rotation;Guide angle 7 can facilitate subsequent spline gear ring 6, filling circular arc groove 5 and riveting cylinder 4 to be pressed into carrier, play the role of auxiliary guide.As can be seen, by assembling the spline tooth ring 6, the filling circular arc groove 5 and the riveting cylinder 4 into a firm whole with the carrier, and then assembling the firm whole with the nut to realize the function of the bolt of the anti-falling and anti-rotating bolt structure of the utility model, in addition, the anti-falling and anti-rotating bolt structure has the advantages of simple structure, convenient use, good fastening effect and long service life.

[0028] In some possible implementations, the first stress column 2 comprises: a first pressure bearing column 21 in a circular truncated cone structure, the first smooth column 12 is located at the center of the upper end face of the first pressure bearing column 21, and the upper end face of the first pressure bearing column 21 is fixedly connected with the other end of the first smooth column 12; a second pressure bearing column 22 in a cylindrical structure, the lower end face of the first pressure bearing column 21 is fixedly connected with one end of the second pressure bearing column 22; wherein the other end of the second pressure bearing column 22 is located at the center of one end of the second stress column 3, and one end of the second stress column 3 is fixedly connected with the other end of the second pressure bearing column 22.

[0029] Specifically, the surface of the upper end face of the first pressure bearing column 21 which is not covered by the first smooth column 12 is a first stepped stress surface for bearing vertical pressure, under the action of the vertical force, the member at the lower part of the second stress column 3 is pressed into the carrier hole to be fixed, and the carrier hole can be directly processed into a circular hole, meanwhile, the first stepped stress surface can also be used to support the externally-hung carrier; the sidewall of the first pressure bearing column can also be used to support the externally-hung carrier, and the inner hole of the externally-hung carrier supported by the sidewall is matched with the sidewall.

[0030] In some possible implementations, the diameter of the upper end face of the first pressure bearing column 21 is 1.5 times of the outer diameter of the first smooth column 12; the diameter of the upper end face of the first pressure bearing column 21 is smaller than the diameter of the lower end face of the first pressure bearing column 21; and the diameter of the lower end face of the first pressure bearing column 21 is the same as the outer diameter of the second pressure bearing column 22.

[0031] Specifically, the diameter of the upper end face of the first pressure bearing column 21 is 1.5 times of the outer diameter of the first smooth column 12, so that the width of the first stepped stress surface is wider, and the externally-hung carrier is facilitated to be supported.

[0032] In some possible implementations, the outer diameter of the second stress column 3 is larger than the outer diameter of the second pressure bearing column 22; the outer diameter of the second stress column 3 is 1.1-1.3 times of the diameter of the upper end face of the first pressure bearing column 21; and the outer diameter of the riveting cylinder 4 is smaller than the outer diameter of the second stress column 3.

[0033] Specifically, the outer diameter of the second stress column 3 is 1.1-1.3 times of the diameter of the upper end face of the first pressure bearing column 21, so that the width of the second stepped stress surface is larger than the frame, which is convenient for supporting the external carrier and better dilutes the pressure intensity in the vertical direction on the external carrier; the outer diameter of the riveting cylinder 4 is smaller than the outer diameter of the second stress column 3, so that the second stress column 3 can resist the carrier embedded on the riveting cylinder 4 by the carrier hole, and further sliding of the carrier upward is avoided.

[0034] In some possible implementations, the diameter of the upper end face of the filling circular arc groove 5 is larger than the diameter of the lower end face of the filling circular arc groove 5; the side wall of the filling circular arc groove 5 is recessed at the central axis of the filling circular arc groove 5, the included angle between the other end face of the riveting cylinder 4 and the side wall of the filling circular arc groove 5 in contact is an acute angle; and the diameter of the upper end face of the filling circular arc groove 5 is the same as the outer diameter of the riveting cylinder 4.

[0035] Specifically, the side wall of the filling circular arc groove 5 is recessed inward, the diameter of the upper end face is larger than the diameter of the lower end face, the included angle between the other end face of the riveting cylinder 4 and the side wall of the filling circular arc groove 5 in contact is an acute angle, and the diameter of the upper end face of the filling circular arc groove 5 is the same as the outer diameter of the riveting cylinder 4, so that in the process of pressing into the carrier, the acute angle structure forces the carrier to displace, the carrier material is completely filled into the recessed structure of the filling circular arc groove 5, a permanent partial filling is formed, and the bolt is prevented from falling off and separating from the carrier.

[0036] In some possible implementations, the outer diameter of the spline gear ring 6 is larger than the diameter of the lower end face of the filling circular arc groove 5; and the angle of the guide angle 7 is 16°-30°.

[0037] Specifically, the angle of the guide angle 7 is 16°-30°, which can facilitate the bolt structure of the utility model to be pressed into the carrier through the carrier hole, and plays a role of auxiliary guiding; the outer diameter of the spline gear ring 6 is larger than the diameter of the lower end face of the filling circular arc groove 5, which further prevents the bolt from falling off and separating from the carrier.

[0038] In some possible implementations, the outer diameter of the riveting cylinder 4 and the outer diameter of the spline gear ring 6 are both larger than the inner diameter of the carrier hole; the first threaded column 11, the first smooth column 12, the first pressure bearing column 21, the second pressure bearing column 22, the second stress column 3, the riveting cylinder 4, the filling circular arc groove 5, the spline gear ring 6 and the guide angle 7 are integrally formed.

[0039] Specifically, the outer diameter of the riveting cylinder 4 and the outer diameter of the spline gear ring 6 are both larger than the inner diameter of the carrier hole, so that in the process of pressing into the carrier, the bolt is more prevented from falling off and separating from the carrier.

[0040] The preferred embodiments of the present application are described in detail above. It should be understood that those skilled in the art can make many modifications and changes without creative labor based on the concept of the present application. Therefore, any technical solutions obtained by logical analysis, reasoning or limited experiments based on the existing technology within the concept of the present application shall be within the protection scope defined by the claims.

Claims

1. A structure for preventing loosening and rotation of bolts, characterized in that, The anti-falling and anti-rotation bolt structure comprises: A metric thread structure (1) in a cylindrical structure, comprising a first threaded column (11) with a threaded outer wall and a first smooth column (12) with a smooth outer wall, one end of the first threaded column (11) being fixedly connected to one end of the first smooth column (12), the first threaded column (11) having the same outer diameter as the first smooth column (12); A first force column (2) with the first smooth column (12) located at the center of one end of the first force column (2), one end of the first force column (2) being fixedly connected to the other end of the first smooth column (12); A second force column (3) in a cylindrical structure, the first force column (2) being located at the center of one end of the second force column (3), one end of the second force column (3) being fixedly connected to the other end of the first force column (2); A riveting cylindrical body (4) with the second force column (3) located at the center of the riveting cylindrical body (4), one end of the riveting cylindrical body (4) being fixedly connected to the other end of the second force column (3); A filled circular-arc groove (5) in a circular-arc columnar structure, one end of the filled circular-arc groove (5) being fixedly connected to the other end of the riveting cylindrical body (4); A spline gear ring (6) in a cylindrical structure, one end of the spline gear ring (6) being fixedly connected to the other end of the filled circular-arc groove (5); A guide angle (7) provided at the keyway end of the other end of the spline gear ring (6).

2. A pull-out and rotation resistant bolt structure according to claim 1, wherein The first force column (2) comprises: A first pressure-bearing column (21) in a circular truncated cone columnar structure, the first smooth column (12) being located at the center of the upper end face of the first pressure-bearing column (21), the upper end face of the first pressure-bearing column (21) being fixedly connected to the other end of the first smooth column (12); A second pressure-bearing column (22) in a cylindrical structure, the lower end face of the first pressure-bearing column (21) being fixedly connected to one end of the second pressure-bearing column (22); wherein the other end of the second pressure-bearing column (22) is located at the center of one end of the second force column (3), one end of the second force column (3) being fixedly connected to the other end of the second pressure-bearing column (22).

3. A pull-out and rotation resistant bolt structure as claimed in claim 2, characterized in that: The diameter of the upper end face of the first pressure-bearing column (21) is 1.5 times the outer diameter of the first smooth column (12).

4. The anti-backout and anti-rotation bolt structure of claim 3, wherein: The diameter of the upper end face of the first pressure-bearing column (21) is smaller than the diameter of the lower end face of the first pressure-bearing column (21); the diameter of the lower end face of the first pressure-bearing column (21) is the same as the outer diameter of the second pressure-bearing column (22).

5. A pull-out and rotation resistant bolt structure according to claim 4, wherein: The outer diameter of the second force column (3) is greater than the outer diameter of the second pressure-bearing column (22); the outer diameter of the second force column (3) is 1.1-1.3 times the diameter of the upper end face of the first pressure-bearing column (21).

6. A pull-out and rotation resistant bolt structure according to claim 5, wherein: The outer diameter of the riveting cylinder (4) is smaller than the outer diameter of the second force column (3).

7. A pull-out and rotation resistant bolt structure as claimed in claim 6, characterized in that: The diameter of the upper end surface of the filling arc groove (5) is larger than the diameter of the lower end surface of the filling arc groove (5); the side wall of the filling arc groove (5) is recessed towards the central axis of the filling arc groove (5), the included angle between the other end surface of the riveting cylinder (4) and the side wall of the filling arc groove (5) in contact is an acute angle; the diameter of the upper end surface of the filling arc groove (5) is the same as the outer diameter of the riveting cylinder (4).

8. A pull-out and rotation resistant bolt structure as claimed in claim 7, characterized in that: The outer diameter of the spline gear ring (6) is larger than the diameter of the lower end surface of the filling arc groove (5); the angle of the guide angle (7) is 16°-30°.

9. A pull-out and rotation resistant bolt structure as claimed in claim 8, characterized in that: The outer diameter of the riveting cylinder (4) and the outer diameter of the spline gear ring (6) are both larger than the inner diameter of the carrier hole.

10. The anti-backout and anti-rotation bolt structure of claim 9, wherein: The first threaded column (11), the first smooth column (12), the first pressure bearing column (21), the second pressure bearing column (22), the second force column (3), the riveting cylinder (4), the filling arc groove (5), the spline gear ring (6) and the guide angle (7) are integrally formed.

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