Bolt structure convenient for corner control

Abstract

The utility model relates to a bolt structure convenient for corner control, which comprises a bolt body, a positioning ball, a positioning ring and a cock, a threaded hole is arranged in the middle of a screw head of the bolt body, the cock is screwed in the threaded hole, and a torsion hole is arranged in the middle of the cock; mounting holes are transversely formed in the screw head on the outer side of the threaded hole, positioning balls are arranged in the mounting holes respectively, and springs are arranged between the positioning balls and the plug cock respectively. A positioning ring is arranged on the outer side of the screw head, and a positioning groove capable of being matched with the positioning ball is formed in the inner side wall of the positioning ring. According to the utility model, the positioning ring is matched with the positioning ball, so that the rotating angle of the bolt body can be easily controlled in the rotating process, and the process requirement is met; the positioning ring is fixed in an auxiliary mode through the magnetic suction cup, and it is guaranteed that synchronous rotation cannot occur between the positioning ring and the bolt body. The bolt is simple in structure and ingenious in design, and corner control over the bolt can be achieved without cooperation of other tools.

Description

Technical Field

[0001] The utility model belongs to the technical field of bolts, and relates to a bolt structure convenient for corner control. Background Art

[0002] As a commonly used connection method, threaded connection is widely applied. In some structures, certain requirements are imposed on the connection strength of bolts, which are usually achieved by methods such as torque control method or corner control method. The torque control method requires professional tools, but the tightening accuracy is insufficient, the material potential cannot be fully exerted, and the environmental impact is large; the corner control method is based on a certain corner, and the bolt generates a certain axial elongation and the connecting piece is compressed. The purpose of this is to screw the bolt onto the tight contact surface and overcome some uneven factors such as surface unevenness. The required axial clamping force is generated by the corner, and the tightening accuracy is high, and a large axial clamping force can be obtained. However, the corner control is relatively troublesome. Summary of the Invention

[0003] The purpose of the utility model is to overcome the deficiencies existing in the prior art, solve the problem that the corner control is relatively troublesome when tightening the bolt, and provide a bolt structure convenient for corner control.

[0004] To achieve the above purpose, the following technical solutions are adopted:

[0005] The bolt structure convenient for corner control includes a bolt body, a positioning ball, a positioning ring and a plug. The characteristics are as follows: a threaded hole is opened in the middle of the screw head at the upper end of the bolt body, and a plug is screwed in the threaded hole. A torque hole is opened in the middle of the plug; an installation hole is horizontally opened inside the screw head outside the threaded hole, and positioning balls are respectively arranged in the installation hole, and springs are respectively arranged between the positioning balls and the plug; a positioning ring is arranged outside the screw head, and a positioning groove capable of cooperating with the positioning ball is opened on the inner side wall of the positioning ring.

[0006] Preferably, a magnetic chuck is arranged at the lower end of the positioning ring.

[0007] Preferably, the torque hole is an internal hexagonal hole.

[0008] Preferably, a limiting bayonet that contracts inward is arranged on one side of the installation hole.

[0009] Preferably, the height of the positioning ring is 1.2 - 2 times the height of the screw head.

[0010] Preferably, the installation holes are circumferentially distributed on the screw head, and the number thereof is 3 - 8.

[0011] Compared with the prior art, the utility model has the following advantages:

[0012] The utility model utilizes the cooperation of the positioning ring and the positioning ball, enabling easy corner control during the rotation of the bolt body to meet the process requirements. The positioning ring is assisted and fixed by a magnetic chuck to ensure that the positioning ring and the bolt body do not rotate synchronously. The structure of the utility model is simple and ingeniously designed, and corner control of the bolt can be achieved without the cooperation of other tools. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a schematic cross-sectional view of the utility model.

[0014] Figure 2 is a schematic view of the overall structure of the utility model.

[0015] Figure 3 is a schematic cross-sectional view of the bolt body of the utility model.

[0016] In the figure: 1, bolt body; 2, positioning ball; 3, positioning ring; 4, plug; 5, threaded hole; 6, torque hole; 7, mounting hole; 8, spring; 9, positioning groove; 10, magnetic chuck; 11, limit bayonet; 12, bolt head. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the utility model.

[0018] As Figures 1 - 3 shown, a bolt structure facilitating corner control includes a bolt body 1, a positioning ball 2, a positioning ring 3, and a plug 4. A threaded hole 5 is opened in the middle of the bolt head 12 at the upper end of the bolt body 1, and a plug 4 is screwed in the threaded hole 5. A torque hole 6 is opened in the middle of the plug 4. After the plug 4 is screwed into the threaded hole 5 in place, the bottom of the plug 4 contacts the bottom wall of the threaded hole 5. At this time, the operator inserts a torque wrench into the torque hole 6, and when the torque wrench is rotated, the plug 4 rotates to drive the bolt body 1 to rotate.

[0019] An installation hole 7 is horizontally opened inside the bolt head outside the threaded hole 5, and positioning balls 2 are respectively arranged in the installation hole 7. Springs 8 are respectively arranged between the positioning balls 2 and the plug 4, and the springs 8 enable the positioning balls 2 to have an outward pre-tightening force.

[0020] A positioning ring 3 is provided on the outer side of the screw head 12. A positioning groove 9 that can cooperate with the positioning ball 2 is formed on the inner side wall of the positioning ring 3. If 4 positioning balls 2 are circumferentially distributed on one screw head 12, when one positioning ball 2 cooperates with the positioning groove 9, it is selected as the initial angle. The bolt body 1 continues to rotate. When the next positioning ball 2 cooperates with the positioning groove 9, the bolt rotates 90°. And so on to achieve the control of the bolt rotation angle.

[0021] Furthermore, a magnetic chuck 10 is provided at the lower end of the positioning ring 3. The magnetic chuck 10 can adsorb on the surface of the metal workpiece, facilitating the fixation of the positioning ring 3 and preventing it from rotating with the bolt body 1.

[0022] Furthermore, the torque hole 6 is an internal hexagonal hole, and the internal hexagonal torque hole 6 is convenient for using an internal hexagonal wrench.

[0023] Furthermore, a limiting bayonet 11 that contracts inward is provided on one side of the mounting hole 7. The limiting bayonet 11 prevents the positioning ball 2 from rolling out of the mounting hole 7.

[0024] Furthermore, the height of the positioning ring 3 is 1.2 - 2 times the height of the screw head 12. Select a positioning ring 3 with an appropriate height according to needs to adapt to the tightening height of the bolt.

[0025] Furthermore, the mounting holes 7 are circumferentially distributed on the screw head 12, and the number thereof is 3 - 8. The positioning balls 2 are respectively installed in the corresponding mounting holes 7. According to the number of the positioning balls 2, the limited rotation angle of the bolt can be controlled.

[0026] Working principle: When the present utility model is in use, first insert the rod portion of the bolt body 1 into the threaded hole to be connected. Then, put the positioning ring 3 on the outside of the screw head 2 (cooperate one positioning ball 2 with the positioning groove 9), use the magnetic chuck 10 to adsorb on the surface of the workpiece, and then insert the internal hexagonal wrench into the torque hole 6. Then the staff rotates the torque hole 6, and the bolt body 1 rotates to drive the positioning ball 2 to rotate. The positioning ball 2 that cooperates with the positioning groove 9 rolls out of the positioning groove 9 until the next positioning ball 2 enters the positioning groove 9. At this time, the rotation angle of the bolt body 1 is the limited angle (if there are 4 positioning balls, the limited angle is 90°), achieving the purpose of controlling the bolt rotation angle.

[0027] It can be understood that the above embodiments are merely exemplary embodiments adopted to illustrate the principle of the present utility model. However, the present utility model is not limited thereto. For those of ordinary skill in the art, various modifications and improvements can be made without departing from the spirit and essence of the present utility model, and these modifications and improvements are also regarded as the protection scope of the present utility model.

Claims

1. A bolt structure facilitating corner control, comprising a bolt body (1), a positioning ball (2), a positioning ring (3) and a plug (4), characterized in that: A threaded hole (5) is formed in the middle of the screw head (12) at the upper end of the bolt body (1). A plug (4) is screwed into the threaded hole (5), and a torque hole (6) is formed in the middle of the plug (4); an installation hole (7) is horizontally formed inside the screw head outside the threaded hole (5), positioning balls (2) are respectively arranged in the installation hole (7), and springs (8) are respectively arranged between the positioning balls (2) and the plug (4); a positioning ring (3) is arranged outside the screw head (12), and a positioning groove (9) capable of cooperating with the positioning ball (2) is formed on the inner side wall of the positioning ring (3).

2. The bolt structure facilitating corner control according to claim 1, characterized in that: A magnetic suction cup (10) is arranged at the lower end of the positioning ring (3).

3. A bolt structure facilitating corner control according to claim 1, wherein: The torque hole (6) is an internal hexagonal hole.

4. A bolt structure facilitating corner control according to claim 1, characterized in that: A limiting bayonet (11) that contracts inward is arranged on one side of the installation hole (7).

5. The bolt structure facilitating corner control according to claim 1, wherein: The height of the positioning ring (3) is 1.2 - 2 times the height of the screw head (12).

6. The bolt structure facilitating corner control according to claim 1, characterized in that: The installation holes (7) are circumferentially distributed on the screw head (12), and the number thereof is 3 - 8.

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