CN213929120U - Elastic pawl type anti-loosening bolt structure - Google Patents
Elastic pawl type anti-loosening bolt structure Download PDFInfo
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- CN213929120U CN213929120U CN202022931429.6U CN202022931429U CN213929120U CN 213929120 U CN213929120 U CN 213929120U CN 202022931429 U CN202022931429 U CN 202022931429U CN 213929120 U CN213929120 U CN 213929120U
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- clamp spring
- spiral groove
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Abstract
The utility model provides an elasticity pawl formula check bolt structure belongs to metal connecting piece technical field. The bolt comprises a bolt rod and a nut, wherein the bolt rod comprises a connecting end, a limiting end and a rod body, a spiral groove is formed in the inner wall of a through hole of the nut, at least one arc-shaped elastic clamp spring is arranged in the spiral groove, the clamp spring is of a straight sheet structure in a natural state, a plurality of positioning assemblies are arranged on the connecting end at equal intervals along the axis direction of the bolt rod, each positioning assembly comprises a plurality of positioning notches which are uniformly distributed on the peripheral surface of the connecting end in the circumferential direction, and a plurality of pawls are arranged on the inner side of each clamp spring at equal intervals; after the clamp spring is clamped in the spiral groove, the phase angle between adjacent pawls is equal to the phase angle between adjacent positioning notches in the positioning assembly; an elastic connecting portion is arranged between the pawl and the inner side edge of the clamp spring, the pawl is provided with a limiting end face towards the leading-out direction of the spiral groove, and the limiting end face and the elastic connecting portion are in smooth transition. The utility model has the advantages of locking effect is good.
Description
Technical Field
The utility model belongs to the technical field of the metal connecting piece, a elasticity pawl formula check bolt structure is related to.
Background
The general bolt structure is that bolt cooperation nut is used for the dismantlement of two or more article to be connected, because reasons such as the article vibrations of connecting, it is not hard up to take place easily between traditional helicitic texture's the bolt and the nut, the nut after not hard up takes place to break away from very easily with between the bolt, current way is through two nut cooperations, so that inboard nut is locked, though the degree of difficulty and the probability that connection structure pine takes off can be improved to a great extent to this kind of mode, it still has the risk of pine taking off, locking effect still is difficult to satisfy the requirement on the article that the vibration is frequent, especially the connection of railway, the relevant equipment of railway, locking effect has directly influenced the reliability and the maintenance cycle of equipment.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an elasticity pawl formula check bolt structure to the above-mentioned problem that prior art exists, the utility model aims to solve the technical problem that how make bolt and nut have better locking effect after being connected.
The purpose of the utility model can be realized by the following technical proposal: an elastic pawl type anti-loosening bolt structure is characterized by comprising a bolt rod and a nut, wherein the bolt rod comprises a connecting end, a limiting end and a rod body, a spiral groove is formed in the inner wall of a through hole of the nut, at least one arc-shaped elastic clamp spring is arranged in the spiral groove, the clamp spring is of a straight sheet structure in a natural state, a plurality of positioning assemblies are arranged on the connecting end at equal intervals along the axis direction of the bolt rod, each positioning assembly comprises a plurality of positioning notches which are circumferentially and uniformly distributed on the peripheral surface of the connecting end, and a plurality of pawls are arranged on the inner side of the clamp spring at equal intervals; after the clamp spring is clamped in the spiral groove, the phase angle between adjacent pawls is equal to the phase angle between adjacent positioning notches in the positioning assembly;
an elastic connecting part is arranged between the pawl and the inner side edge of the clamp spring, the pawl is provided with a limiting end surface facing the leading-out direction of the spiral groove, and the limiting end surface and the elastic connecting part are in smooth transition; the outer edge of the clamp spring is provided with a limiting lug, and a limiting notch corresponding to the limiting lug is formed in the spiral groove.
Furthermore, both ends of the clamp spring are respectively provided with a positioning hole.
Further, the diameter of the connecting end is smaller than that of the rod body.
During installation, the two arms of the pliers or the tweezers are respectively matched with the positioning holes, so that the clamp spring is in an inward compression state, then the clamp spring is clamped into the spiral groove, the clamp spring is placed at the bottom of the spiral groove through rotation, the bolt rod or the nut is pressed and rotated, the nut is connected with the bolt rod, a to-be-connected piece is pressed tightly, the screwing-in action is smooth due to smooth transition between the limiting end face and the elastic connecting part, and when the limiting lug on the clamp spring corresponds to the limiting notch in the spiral groove, the clamp spring is locked; can only be destructively disassembled and can not be disassembled for restoration.
In the connection state, because the original straight clamp spring is extruded by the spiral groove to be spiral, but two ends of the clamp spring are respectively in a pressing state with two longitudinal side walls of the spiral groove, the clamp spring is not easy to be screwed out, in addition, each pawl is clamped into a positioning notch which is most adaptive to pawl deformation, because the same group of positioning notches are positioned on the same cross section of the bolt rod, part of the pawls are positioned in the positioning notches in one cross section, the other part of the pawls are positioned in the positioning notches corresponding to adjacent positioning components, the limiting end surfaces are abutted against the peripheral inner walls of the positioning notches, the bolt rod needs to be twisted to move towards the leading-out direction of the spiral groove when the bolt rod is separated relative to the nut, but the movement trend is influenced by the limiting end surfaces and the peripheral inner walls of the positioning notches, so that the bolt structure has a very good anti-loosening effect after being assembled, on the other hand, as the clamp spring has elasticity and the pawl also has elasticity, the bolt rod and the nut can be buffered and damped in the mechanical vibration process, so that the anti-falling effect is further enhanced; and moreover, the limiting notch is matched with the limiting bump, so that the clamp spring can be locked.
Drawings
Fig. 1 is a partial sectional view of the present bolt structure.
Fig. 2 is a sectional view taken along a-a in fig. 1.
Fig. 3 is a schematic structural diagram of the snap spring.
In the figure, 1, a bolt rod; 11. a connecting end; 12. a limiting end; 13. a positioning notch; 14. a rod body; 2. a nut; 21. a helical groove; 3. a clamp spring; 31. positioning holes; 4. a pawl; 41. an elastic connection portion; 42. a limiting end face; 5. and a limiting bump.
Detailed Description
The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.
As shown in fig. 1, 2 and 3, the bolt comprises a bolt rod 1 and a nut 2, the bolt rod 1 comprises a connecting end 11, a limiting end 12 and a rod body 14, a spiral groove 21 is formed in the inner wall of a through hole of the nut 2, at least one arc-shaped and elastic clamp spring 3 is arranged in the spiral groove 21, the clamp spring 3 is of a straight sheet structure in a natural state, a plurality of positioning assemblies are arranged on the connecting end 11 at equal intervals along the axial direction of the bolt rod 1, each positioning assembly comprises a plurality of positioning notches 13 which are circumferentially and uniformly distributed on the peripheral surface of the connecting end 11, and a plurality of pawls 4 are arranged on the inner side of the clamp spring 3 at equal intervals; after the clamp spring 3 is clamped in the spiral groove 21, the phase angle between the adjacent pawls 4 is equal to the phase angle between the adjacent positioning notches 13 in the positioning assembly;
an elastic connecting part 41 is arranged between the pawl 4 and the inner edge of the clamp spring 3, the pawl 4 is provided with a limit end surface 42 facing the leading-out direction of the spiral groove 21, and the limit end surface 42 and the elastic connecting part 41 are in smooth transition.
The two ends of the clamp spring 3 are respectively provided with a positioning hole 31, and the diameter of the connecting end 11 is smaller than that of the rod body 14.
During installation, the two arms of the pliers or the tweezers are respectively matched with the positioning holes 31, so that the clamp spring 3 is in an inward compression state, then the clamp spring 3 is clamped into the spiral groove 21, the clamp spring 3 is placed at the bottom of the spiral groove 21 through rotation, the bolt rod 1 or the nut 2 is pressed and rotated, the nut 2 is connected with the bolt rod 1, a to-be-connected part is pressed, the screwing-in action is smooth due to smooth transition between the limiting end face 42 and the elastic connecting part 41, and when the limiting lug 5 on the clamp spring 3 corresponds to the limiting notch in the spiral groove 21, the clamp spring 3 is locked; can only be destructively disassembled and can not be disassembled for restoration.
In the connection state, the original straight clamp spring 3 is also in a spiral shape under the extrusion of the spiral groove 21, but two ends of the clamp spring 3 are respectively in a pressing state with two longitudinal side walls of the spiral groove 21, so that the clamp spring 3 is not easy to be screwed out, in addition, each pawl 4 is clamped into the most adaptive positioning notch 13 after the pawl 4 is deformed, as the same group of positioning notches 13 are positioned on the same cross section of the bolt rod 1, part of the pawls 4 are positioned in the positioning notches 13 in one of the cross sections, and the other part of the pawls 4 are positioned in the positioning notches 13 corresponding to the adjacent positioning components, and the limiting end face 42 is abutted against the inner wall of the peripheral face of the positioning notch 13, the bolt rod 1 needs to twist the pawls 4 to move towards the leading-out direction of the spiral groove 21 when being separated relative to the nut 2, but the movement trend cannot be smoothly performed under the action of the limiting end face 42 and the inner wall of the peripheral face, thereby make this bolt construction have very good locking effect after the assembly, on the other hand, because jump ring 3 has elasticity, pawl 4 also has elasticity, can cushion and the damping to shank of bolt 1 and nut 2 at mechanical shock in-process, makes its anticreep effect further strengthen, moreover, spacing notch and spacing lug 5's cooperation makes jump ring 3 can be locked.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.
Claims (3)
1. An elastic pawl type anti-loosening bolt structure is characterized by comprising a bolt rod (1) and a nut (2), wherein the bolt rod (1) comprises a connecting end (11), a limiting end (12) and a rod body (14), a spiral groove (21) is formed in the inner wall of a through hole of the nut (2), at least one arc-shaped and elastic clamp spring (3) is arranged in the spiral groove (21), the clamp spring (3) is of a flat and straight sheet structure in a natural state, a plurality of positioning assemblies are arranged on the connecting end (11) at equal intervals along the axial direction of the bolt rod (1), each positioning assembly comprises a plurality of positioning notches (13) which are uniformly distributed on the peripheral surface of the connecting end (11) in the circumferential direction, and a plurality of pawls (4) are arranged on the inner side of each clamp spring (3) at equal intervals; after the clamp spring (3) is clamped in the spiral groove (21), the phase angle between adjacent pawls (4) is equal to the phase angle between adjacent positioning notches (13) in the positioning assembly;
an elastic connecting part (41) is arranged between the pawl (4) and the inner edge of the clamp spring (3), the pawl (4) is provided with a limiting end surface (42) facing the leading-out direction of the spiral groove (21), and the limiting end surface (42) and the elastic connecting part (41) are in smooth transition; the outer edge of the clamp spring (3) is provided with a limiting lug (5), and a limiting notch corresponding to the limiting lug (5) is formed in the spiral groove (21).
2. An elastic pawl type anti-loose bolt structure according to claim 1, characterized in that, both ends of the circlip (3) are respectively provided with a positioning hole (31).
3. An elastic ratchet type check bolt structure according to claim 1 or 2, characterized in that the diameter of the connecting end (11) is smaller than the shank (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022931429.6U CN213929120U (en) | 2020-12-09 | 2020-12-09 | Elastic pawl type anti-loosening bolt structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022931429.6U CN213929120U (en) | 2020-12-09 | 2020-12-09 | Elastic pawl type anti-loosening bolt structure |
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| Publication Number | Publication Date |
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| CN213929120U true CN213929120U (en) | 2021-08-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022931429.6U Active CN213929120U (en) | 2020-12-09 | 2020-12-09 | Elastic pawl type anti-loosening bolt structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114992214A (en) * | 2022-06-21 | 2022-09-02 | 冰轮环境技术股份有限公司 | Check bolt structure |
-
2020
- 2020-12-09 CN CN202022931429.6U patent/CN213929120U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114992214A (en) * | 2022-06-21 | 2022-09-02 | 冰轮环境技术股份有限公司 | Check bolt structure |
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