CN211398193U

CN211398193U - Bolt structure with trapezoidal rotation stopping groove

Info

Publication number: CN211398193U
Application number: CN201922237352.XU
Authority: CN
Inventors: 杨东佐
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-12-13
Filing date: 2019-12-13
Publication date: 2020-09-01
Anticipated expiration: 2029-12-13

Abstract

The utility model provides a take trapezoidal groove's that splines bolt structure, includes hexagon socket head cap screw, has a plurality of die-cut fashioned trapezoidal groove that splines along hexagon socket head cap screw's head periphery array, forms trapezoidal tooth between the adjacent two grooves that splines, and the tank bottom in groove that splines forms the root of tooth of trapezoidal tooth, and the tooth top and the root of tooth of trapezoidal tooth all are circular-arcly, and the arc center of the tooth top and the root of tooth of trapezoidal tooth all is located hexagon socket head cap screw's axis. By adopting the technical scheme, the bolt structure can be locked by a conventional hexagonal wrench, a special sleeve wrench with a locking sleeve can be sleeved on the periphery of the bolt structure, and the bolt structure is locked by the wrench for locking the rotation stopping groove, so that the bolt structure is locked by two modes, and in addition, the rotation stopping groove can also be used for locking the rotation stopping sleeve with each other.

Description

Bolt structure with trapezoidal rotation stopping groove

Technical Field

The utility model belongs to the technical field of connect the fastening technique and specifically relates to a take trapezoidal bolted construction who ends the turn trough.

Background

The Chinese patent application with the patent application number of CN201610777306.7 discloses a fastening connection assembly, a fastening connection structure and a track structure, wherein a rotation stopping sleeve is arranged, the rotation stopping sleeve is provided with a rotation stopping convex part of the rotation stopping sleeve, an accessory body rotation stopping convex part is arranged on an accessory body, the rotation stopping of the rotation stopping sleeve relative to the accessory body is realized through the relative resistance of the rotation stopping convex part of the rotation stopping sleeve and the rotation stopping convex part of the accessory body, the rotation stopping of a bolt or a nut relative to the accessory body is realized because the rotation stopping sleeve is stopped relative to the bolt, and finally the rotation stopping sleeve is stopped through a resisting nut to avoid the rotation stopping sleeve from coming off along the axial direction of the bolt.

However, in the above technical scheme, the outer hexagon bolt can only be adopted, the head of the inner hexagon bolt is a round head, so that the rotation of the rotation stopping sleeve can not be stopped relatively, and therefore the inner hexagon bolt can not be adopted.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a take trapezoidal groove of splining's bolt structure, its both accessible conventional hexagonal head spanner locking also can be through purpose-made box spanner, and can splining for the groove of splining.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a take trapezoidal groove's that splines bolt structure, includes hexagon socket head cap screw, follows hexagon socket head cap screw's head periphery array has a plurality of die-cut fashioned trapezoidal grooves that splines, and adjacent two splines and form trapezoidal tooth between the groove, and the tank bottom in spline forms the root of tooth of trapezoidal tooth, the tooth top and the root of tooth of trapezoidal tooth all are circular-arcly, and the tooth top of trapezoidal tooth and the arc center of root of tooth all are located hexagon socket head cap screw's axis.

Furthermore, the rotation stopping groove is in an isosceles trapezoid shape.

Furthermore, the rotation stopping grooves are evenly arrayed along the head of the hexagon socket head cap screw.

Further, the ratio of the tooth height x of the trapezoidal teeth to the diameter y of the head of the hexagon socket head is greater than or equal to 1/45.

Further, the included angle α between the left side and the right side of the trapezoidal tooth is in the range: alpha is more than or equal to 8 degrees and less than or equal to 12 degrees.

Furthermore, still include the rotation stopping cover, the protruding bulge that is equipped with in the periphery of rotation stopping cover, the rotation stopping cover includes the trepanning, be equipped with on the inner wall of trepanning with the rotation stopping inslot matches the interior rotation stopping body, the rotation stopping cover is established including the head of hexagon bolt through the trepanning cover.

Further, still including the spanner that is used for locking hexagon socket head cap screw, the spanner includes the handle and establishes the lock sleeve in handle one end, the inner wall of lock sleeve is equipped with a plurality of and ends the trapezoidal convex body of groove complex.

By adopting the technical scheme, the bolt structure can be locked by a conventional hexagonal wrench, a special sleeve wrench with a locking sleeve can be sleeved on the periphery of the bolt structure, and the bolt structure is locked by the wrench for locking the rotation stopping groove, so that the bolt structure is locked by two modes, and in addition, the rotation stopping groove can also be used for locking the rotation stopping sleeve with each other.

Drawings

Fig. 1 is a schematic view of a head of an hexagon socket head cap screw.

Fig. 2 is a schematic view of the present invention in a locked state.

Fig. 3 is an exploded view of fig. 2.

Detailed Description

As shown in fig. 1-3, a bolt structure with a trapezoidal anti-rotation groove 15 includes an inner hexagon bolt 7 and an anti-rotation sleeve 2, a plurality of anti-rotation grooves 15 which are formed by punching and are in a trapezoidal shape are evenly arrayed along the periphery of the head of the inner hexagon bolt 7, the anti-rotation grooves 15 are in an isosceles trapezoid shape, trapezoidal teeth 16 are formed between every two adjacent anti-rotation grooves 15, tooth root portions 17 of the trapezoidal teeth 16 are formed at the bottom of the anti-rotation grooves 15, tooth crest portions 18 and tooth root portions 17 of the trapezoidal teeth 16 are both arc-shaped, arc centers of the tooth crest portions 18 and the tooth root portions 17 of the trapezoidal teeth 16 are both located on the axis of the inner hexagon bolt 7, a protrusion 5 is convexly arranged on the periphery of the anti-rotation sleeve 2, the anti-rotation sleeve 2 includes a sleeve hole 3, an inner anti-rotation body 4 which is matched with the anti-rotation groove 15 is arranged on the inner wall of the sleeve hole 3, the anti-rotation sleeve 2 is sleeved on the head of the inner hexagon bolt 7 through the sleeve hole 3, the inner anti-rotation body 4 is inserted into the trapezoidal anti.

In order to secure the strength of the trapezoidal teeth 16, the ratio of the tooth height x of the trapezoidal teeth 16 to the diameter y of the head of the hexagon socket head screw 7 is greater than or equal to 1/45.

In the following, the M20 hexagon socket head bolt 7 is taken as an example, the diameter of the bolt head is 31.5mm, the included angle α =9.63 ° between the right and left sides of the trapezoidal tooth 16, the tooth height x =0.8mm of the trapezoidal tooth 16, and the width z =2.88mm of the tooth root 17 of the trapezoidal tooth 16.

As a preferable scheme, the spanner 19 for locking the hexagon socket head cap screw 7 is further included, the spanner comprises a handle 20 and a locking sleeve 21 arranged at one end of the handle 20, and a plurality of trapezoidal convex bodies 22 matched with the trapezoidal rotation stopping grooves 15 are arranged on the inner wall of the locking sleeve 21. The special wrench 19 is used to fit over the head of the hexagon socket bolt 7 to rotate the hexagon socket bolt 7, and a conventional hexagon wrench may be used to rotate the hexagon socket bolt 7.

By adopting the technical scheme, the bolt structure can be locked by a conventional hexagonal wrench, and can also be locked by sleeving a special socket wrench 19 on the periphery of the bolt structure and locking the bolt structure by the wrench rotating stopping relative to the rotating stopping groove 15, so that the bolt structure can be locked by two modes, and in addition, the rotating stopping groove 15 can also be used for mutually stopping rotation with the rotating stopping sleeve 2.

The bolt structure of the present invention will be described below with reference to the following embodiments:

as shown in fig. 2 and 3, a fastening connection mechanism, including a fastener assembly and a rotation stopping and release stopping pad 1, the fastener assembly includes a fastener and a rotation stopping sleeve 2 sleeved on the fastener, the periphery of the fastener is provided with an outer rotation stopping portion, the rotation stopping sleeve 2 includes a sleeve hole 3, an inner rotation stopping body 4 matched with the outer rotation stopping portion is arranged on the inner wall of the sleeve hole 3, a convex body 5 is convexly arranged at the periphery of the rotation stopping sleeve 2, the rotation stopping and release stopping pad 1 includes a pad body 6, a through hole 7 arranged on the pad body 6, and a release stopping portion which is arranged on the circumferential direction and is used for stopping the protruding body 5 extending out of the fastener assembly and further stopping the fastener assembly from rotating relative to the rotation stopping and release stopping pad 1 and is arranged on one side of the convex body 5 far from the pad body 6 and stopping the release stopping portion of the protruding body 5 from one side of the pad body 6 when.

In this embodiment, the fastener does the utility model discloses the hexagon socket head cap screw 7 that adopts, it has the groove 15 that splines that is trapezoidal form of a plurality of die-cut fashioned along the even array of head periphery of hexagon socket head cap screw 7, hexagon socket head cap screw 7 passes in proper order and ends to rotate and only to take off pad 1, first by the through-hole on connecting piece 8 and with the second by the screw hole threaded connection on the connecting piece 8, hexagon socket head cap screw 7 clockwise is the direction of screwing, end outward and rotate the portion and end the groove 15, end and be equipped with trapezoidal interior only rotor 4 on the inner wall of trepanning 3 of cover 2, interior only rotor 4 inserts and ends in the groove 15, only rotate the relative hexagon socket head cap screw 7 of cover 2 and end and rotate.

The anti-rotation and anti-release pad 1 has a structure that the anti-rotation part is a first anti-rotation lug 10 convexly arranged on one side of the pad body 6 far away from the connected piece 8, the anti-release part is an anti-release block 11 arranged on one side of the first anti-rotation lug 10 far away from the pad body 6, the anti-release block 11 is arranged on one side of the first anti-rotation lug 10 in the clockwise direction, and the pad body 6, the first anti-rotation lug 10 and the anti-release block 11 are integrally formed in a stamping mode.

The fastening method adopting the embodiment comprises the following steps:

(1) the inner hexagon bolt 7 sequentially penetrates through the through holes on the rotation-stopping and slip-preventing pad 1 and the first connected piece 8 and is in threaded connection with the threaded hole on the second connected piece 8;

(2) the head of the hexagon socket head cap screw 7 is sleeved with the rotation stopping sleeve 2 which is relatively stopped with the head of the hexagon socket head cap screw 7, then the hexagon socket head cap screw 7 is rotated in the anticlockwise direction until the convex body 5 of the rotation stopping sleeve 2 is stopped by the first rotation stopping convex block 10 on the rotation stopping and separation stopping pad 1 positioned on one side of the unscrewing direction of the convex body 5, and at the moment, the convex body 5 is far away from the side of the connecting piece 8 and is limited by the separation stopping block 11 of the rotation stopping and separation stopping pad 1, so that the rotation stopping sleeve 2 is prevented from being separated from the head of the hexagon socket head cap screw 7.

In the above fastening method, a special socket wrench with a locking sleeve may be used to fit over the head of the socket bolt 7 to rotate the socket bolt 7, or a conventional hexagon wrench may be used to rotate the socket bolt 7.

The effects of the above embodiment are explained below, because the contact area between the rotation stop and release prevention pad 1 and the surface of the connected piece 8 is larger than the contact area between the head of the hexagon socket head screw 7 and the rotation stop and release prevention pad 1, the rotation stop and release prevention pad 1 and the connected piece 8 are more easily loosened relative to the rotation stop and release prevention pad 1, and the first rotation stop protrusion 10 arranged on the rotation stop and release prevention pad 1 can realize the relative rotation stop of the hexagon socket head screw 7 and the rotation stop and release prevention pad 1, thereby increasing the rotation stop effect of the fastening connection mechanism.

In a conventional fastening method, the inner hexagonal bolt 7 is loosened by a certain angle in the loosening direction after being locked so as to prevent the head stress of the inner hexagonal bolt 7 from being large, and the method is widely applied to locking of a hub. After the bolt is screwed, the angle pretightening force is loosened to a certain extent, the bolt is in the elastic deformation limit after being screwed, especially under the conditions of high temperature and full load of vibration load, the bolt can generate limit creep after the bolt is continuously pressed for a long time, and after the limit creep of the bolt causes plastic deformation to form a fixed condition, the fastening strength of the bolt can be greatly reduced and even fails. The half circle of returning is to reduce the limit elastic deformation, so that the bolt is in the normal elastic deformation range, the pre-tightening stress is reduced, and the probability of generating limit plastic deformation and failure is greatly reduced in the continuous pressure fastening state of the bolt, so that the bolt can keep the fastening pressure with continuous high strength.

By adopting the fastening method of the invention, the conventional fastening method is skillfully combined, the hexagon socket head cap screw 7 is reversely unscrewed after being locked, and the convex body 5 of the rotation-stopping sleeve 2 is limited by the first rotation-stopping convex block 10 and the anti-drop block 11 on the rotation-stopping and anti-drop pad 1, so that the rotation stopping of the hexagon socket head cap screw 7 relative to the rotation-stopping and anti-drop pad 1 can be realized, the rotation-stopping sleeve 2 is prevented from dropping off from the hexagon socket head cap screw 7, and the rotation-stopping and anti-drop functions are realized.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the present invention, but is intended to cover various modifications, combinations, and alternatives, which will be apparent to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims

1. The utility model provides a take trapezoidal rotation stopping groove's bolt structure, includes hexagon socket head cap screw, its characterized in that: follow hexagon socket head cap screw's head periphery array has the groove that splines that is of a plurality of die-cut shaping, and adjacent two are ended and are formed trapezoidal tooth between the groove, end the tank bottom in groove and form the root of tooth of trapezoidal tooth, the tooth top and the root of tooth of trapezoidal tooth all are circular-arcly, and the tooth top of trapezoidal tooth and the arc center of root of tooth all are located hexagon socket head cap screw's axis.

2. The bolt structure with trapezoidal rotation-stopping grooves according to claim 1, characterized in that: the rotation stopping groove is in an isosceles trapezoid shape.

3. The bolt structure with trapezoidal rotation-stopping grooves according to claim 1, characterized in that: the rotation stopping grooves are evenly arrayed along the head of the inner hexagon bolt.

4. The bolt structure with trapezoidal rotation-stopping grooves according to claim 1, characterized in that: the ratio of the tooth height x of the trapezoidal teeth to the diameter y of the head of the hexagon socket head is greater than or equal to 1/45.

5. The bolt structure with trapezoidal rotation-stopping grooves according to claim 2, characterized in that: the included angle alpha between the left side edge and the right side edge of the trapezoidal tooth is within the range as follows: alpha is more than or equal to 8 degrees and less than or equal to 12 degrees.

6. The bolt structure with trapezoidal rotation-stopping grooves according to claim 1, characterized in that: the anti-rotation device is characterized by further comprising an anti-rotation sleeve, wherein a protruding body is convexly arranged on the periphery of the anti-rotation sleeve, the anti-rotation sleeve comprises a sleeve hole, an inner anti-rotation body matched with the anti-rotation groove is arranged on the inner wall of the sleeve hole, and the head of the hexagon bolt is arranged on the anti-rotation sleeve through the sleeve hole.

7. The bolt structure with trapezoidal rotation-stopping grooves according to claim 1, characterized in that: the spanner comprises a handle and a locking sleeve arranged at one end of the handle, and a plurality of trapezoidal convex bodies matched with the rotation stopping grooves are arranged on the inner wall of the locking sleeve.