Anti-thread-slipping double-end bolt

Abstract

The utility model relates to an anti-skidding stud bolt which comprises a stud bolt main body, a bolt external thread is arranged on the stud bolt main body, a nut is screwed outside the stud bolt main body, a countersunk head screw hole is formed in the nut, an anti-skidding thread body is assembled in the countersunk head screw hole, a round groove is formed in the anti-skidding thread body, and the anti-skidding thread body is connected with the round groove. An anti-skid screw rod is installed in the round groove and provided with a containing cavity, a buffering mechanism is installed in the containing cavity and provided with a shaft seat, a protection plate is installed on the shaft seat and provided with fastening thread teeth, and the fastening thread teeth are meshed with external threads of the bolt. The anti-skid lead screw is provided with a sliding external thread, and the sliding external thread is matched with the internal thread of the countersunk head screw hole. According to the technical scheme, the double-end bolt has the advantages of being reasonable in structural design and solving the problem that when the threads of the double-end bolt make contact with a nut, the threads of the double-end bolt are repeatedly rubbed, abrasion is too large, and the thread slipping phenomenon possibly occurs.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of stud bolts, especially a stud bolt preventing thread stripping. BACKGROUND

[0002] The stud bolt is also called a stud screw, both ends of the stud screw are provided with threads, and the stud screw is mainly used in automobiles, motorcycles, tower cranes and large-span steel structures to stably connect two components that are not connected to each other, one end of the stud bolt is screwed into a main body, and the other end is provided with a nut after an accessory is installed, the accessory is frequently disassembled, and the stud bolt is convenient to replace, in the prior art, the threads of the stud bolt are repeatedly rubbed when the threads contact the nut, and the threads may be excessively worn and may cause thread stripping, thereby causing connection failure, and therefore, the prior art needs to be improved. SUMMARY

[0003] Based on the above problems, the utility model provides a stud bolt with a reasonable structure and solves the problem that the threads of the stud bolt are repeatedly rubbed when the threads contact the nut, which may cause thread stripping when the threads are excessively worn.

[0004] To achieve the above object, the utility model provides the following technical scheme: a stud bolt preventing thread stripping, which comprises a stud bolt body, bolt external threads are formed at both ends of the outer part of the stud bolt body, nuts are screwed on the outer part of the stud bolt body at both sides of the external threads, counterbores are formed at the centers of the opposite two surfaces of the nuts, an anti-thread-stripping body is assembled in the counterbores, a circular groove is formed at the bottom end of the anti-thread-stripping body, an anti-thread-stripping rod is vertically installed in the circular groove, a receiving cavity is formed at the bottom end of the anti-thread-stripping rod, a buffer mechanism is installed in the receiving cavity, an axle seat is installed at the end of the buffer mechanism, a protective plate is installed at the bottom end of the axle seat, fastening thread teeth are formed at the bottom end of the protective plate, the fastening thread teeth are engaged with the bolt external threads, thread external threads are formed at the outer wall of the anti-thread-stripping rod, and the thread external threads are matched with the internal threads of the counterbores.

[0005] Through the above technical scheme, the stud bolt body is a stud bolt with left and right screw threads and nuts in the prior art, the nuts are arranged at the bolt external threads, counterbores are formed at the centers of the opposite two surfaces of the nuts, the anti-thread-stripping body is assembled in the counterbores, the anti-thread-stripping rod in the anti-thread-stripping body is vertically fixed in the circular groove, the bottom end of the anti-thread-stripping rod is provided with the buffer mechanism, the protective plate is attached to the outer wall of the stud bolt body, the fastening thread teeth on the protective plate are engaged with the bolt external threads on the stud bolt body, the nut is fastened on the stud bolt body, and thread stripping between the nut and the stud bolt body is prevented.

[0006] The utility model further sets up: the buffer mechanism includes the fixed plate of installation in the storage cavity inside, the end of fixed plate is installed with telescopic link perpendicularly, the end of telescopic link is installed with universal seat, the inside of universal seat is installed with universal ball, the part of universal ball is assembled with the axle seat outside universal seat.

[0007] Through adopting above technical scheme, the fixed plate in buffer mechanism is fixed in storage cavity, the top of telescopic link is installed with universal seat, universal ball can rotate between universal seat and axle seat, thereby connecting buffer mechanism with protective plate.

[0008] The utility model further sets up: the outside of telescopic link is equipped with spring between fixed plate and universal seat.

[0009] Through adopting above technical scheme, through telescopic cooperation between telescopic link and spring, thereby when rotating anti -skid screw rod into countersunk hole, the outer thread of protective plate and stud bolt main part is tightly engaged.

[0010] The utility model further sets up: the inner wall of universal seat is evenly equidistance and is opened with rotation cavity along its axle, the inside of rotation cavity is installed with ball bearing, ball bearing is attached with universal ball.

[0011] Through adopting above technical scheme, ball bearing can rotate with universal ball in rotation cavity, thereby improving the rotation of universal ball.

[0012] The utility model further sets up: the protective plate is composed of hard board layer and corrosion -resistant layer.

[0013] Through adopting above technical scheme, the corrosion resistance of protective plate can be improved through corrosion -resistant layer.

[0014] The utility model further sets up: the outside of anti -skid screw rod is equipped with annular rubber sheet and annular gasket in countersunk hole, the bottom of annular gasket is installed with fixed ring.

[0015] Through adopting above technical scheme, when anti -skid screw rod is screwed into countersunk hole, annular rubber sheet and annular gasket seal the gap between anti -skid screw rod and countersunk hole.

[0016] The utility model further sets up: the outer wall of annular rubber sheet surface annular gasket is evenly equidistance and is installed with rubber block along its axle.

[0017] Through adopting above technical scheme, the rubber block can extrude between annular rubber sheet and annular gasket. ACCURATE DRAWING

[0018] Figure 1 It is the structure diagram of the utility model embodiment.

[0019] Figure 2 The anti-slip wire body structure diagram of the embodiment of the utility model.

[0020] Figure 3 The buffer mechanism structure diagram of the embodiment of the utility model.

[0021] Figure 4 The protective plate structure diagram of the embodiment of the utility model.

[0022] The meaning of the reference signs in the figure: 1 - stud main body, 2 - stud external thread, 3 - nut, 4 - anti-slip wire body, 5 - countersunk hole, 6 - round groove, 7 - anti-slip wire rod, 8 - storage cavity, 9 - shaft seat, 10 - buffer mechanism, 101 - fixed plate, 102 - telescopic rod, 103 - spring, 104 - universal ball, 105 - ball, 106 - rotating cavity, 107 - universal seat, 11 - fastening thread tooth, 12 - protective plate, 121 - hard plate layer, 122 - corrosion-resistant layer, 13 - annular rubber sheet, 14 - rubber block, 15 - fixing ring, 16 - annular gasket, 17 - wire external thread. DETAILED DESCRIPTION

[0023] The specific embodiment is merely the explanation of the utility model, and it is not the limitation of the utility model, and the person skilled in the art can make the modification of the embodiment without the creative contribution according to the need after reading the present specification, but as long as in the claim range of the utility model, it is protected by the patent law.

[0024] Reference is made to the accompanying drawings Figures 1-4The embodiment discloses an anti-slip double-end bolt, which comprises a double-end bolt body 1, bolt external threads 2 are formed at the two ends of the double-end bolt body 1, nuts 3 are screwed at the two external threads 2 of the double-end bolt body 1, counterbores 5 are formed at the centers of the opposite two faces of the nuts 3, anti-slip bolt bodies 4 are assembled in the counterbores 5, circular grooves 6 are formed at the bottom ends of the anti-slip bolt bodies 4, anti-slip bolt rods 7 are vertically installed in the circular grooves 6, receiving cavities 8 are formed at the bottom ends of the anti-slip bolt rods 7, buffer mechanisms 10 are installed in the receiving cavities 8, shaft seats 9 are installed at the ends of the buffer mechanisms 10, protective plates 12 are installed at the bottom ends of the shaft seats 9, fastening thread teeth 11 are formed at the bottom ends of the protective plates 12, the fastening thread teeth 11 are engaged with the bolt external threads 2, external slip bolt threads 17 are formed at the upper ends of the outer walls of the anti-slip bolt rods 7, and the external slip bolt threads 17 are matched with the internal threads of the counterbores 5. The double-end bolt body 1 is a double-end bolt with left and right screw nuts in the prior art, the nut 3 in the double-end bolt is arranged at the bolt external thread 2, the counterbores 5 are formed at the centers of the opposite two faces of the nut 3, the anti-slip bolt body 4 is assembled in the counterbores 4, the anti-slip bolt rod 7 in the anti-slip bolt body 4 is vertically fixed in the circular groove 6, the bottom end of the anti-slip bolt rod is provided with the buffer mechanism 10, the protective plate 12 is attached to the outer wall of the double-end bolt body 1, the fastening thread teeth 11 on the protective plate 12 are engaged with the bolt external threads 2 on the double-end bolt body 1, the nut 3 is fastened on the double-end bolt body 1, and the slip phenomenon between the nut 3 and the double-end bolt body 1 is prevented.

[0025] The embodiment further comprises the following arrangement: the buffer mechanism 10 comprises a fixed plate 101 installed in the receiving cavity 8, a telescopic rod 102 is vertically installed at the end of the fixed plate 101, a universal seat 107 is installed at the end of the telescopic rod 102, a universal ball 104 is installed in the universal seat 107, and the universal ball 104 is assembled in the shaft seat 9 outside the universal seat 107. The fixed plate 101 in the buffer mechanism 10 is fixed in the receiving cavity 8, the top end of the telescopic rod 102 is installed in the universal seat 107, the universal ball 104 can rotate between the universal seat 107 and the shaft seat 9, and the buffer mechanism 10 is connected with the protective plate 12.

[0026] The embodiment further comprises the following arrangement: a spring 103 is sleeved between the fixed plate 101 and the universal seat 107 outside the telescopic rod 102. Through the telescopic cooperation between the telescopic rod 102 and the spring 103, the protective plate 12 is tightly engaged with the external threads of the double-end bolt body 1 when the anti-slip bolt rod 7 is screwed into the counterbores 5.

[0027] The embodiment is further provided with: the inner wall of the universal seat 107 is uniformly and equidistantly provided with a rotating cavity 106 along its axis, the rotating cavity 106 is internally provided with a ball bearing 105, and the ball bearing 105 is arranged in close contact with the universal ball 104. The ball bearing 105 can rotate in close contact with the universal ball 104 in the rotating cavity 106, thereby improving the rotation of the universal ball 104.

[0028] The embodiment is further provided with: the protective plate 12 is composed of a hard plate layer 121 and a corrosion-resistant layer 122. The corrosion-resistant layer 122 can improve the corrosion resistance of the protective plate 12.

[0029] The embodiment is further provided with: the outer part of the anti-skid screw rod 7 is sleeved with an annular rubber sheet 13 and an annular gasket 16 in the countersunk hole 5, and the bottom end of the annular gasket 16 is provided with a fixing ring 15. When the anti-skid screw rod 7 is screwed into the countersunk hole 5, the annular rubber sheet 13 and the annular gasket 16 seal the gap between the anti-skid screw rod 7 and the countersunk hole 5.

[0030] The embodiment is further provided with: the outer wall of the annular rubber sheet 13 opposite to the annular gasket 16 is uniformly and equidistantly provided with a rubber block 14 along its axis. The rubber block 14 can extrude the annular rubber sheet 13 and the annular gasket 16.

[0031] Working principle: in use, when the double-headed bolt body 1 is installed, after the nut 3 is screwed onto the double-headed bolt body 1 and fixed, the anti-skid screw rod 7 in the anti-skid screw body 4 is inserted into the countersunk hole 5 and rotated, and the anti-skid screw rod 7 is pushed downward along with the thread cooperation between the anti-skid screw outer thread 17 on the anti-skid screw rod 7 and the countersunk hole 5, the fastening thread tooth 11 on the protective plate 12 is engaged with the bolt outer thread 2 on the double-headed bolt body 1, thereby fastening the nut 3 on the bolt outer thread 2 on the double-headed bolt body 1, thereby preventing the nut 3 from slipping.

[0032] The above is only the preferred embodiment of the present application, and it should be pointed out that for ordinary skilled in the art, without departing from the technical principles of the present application, a number of improvements and modifications can be made, and the above-mentioned improvements and modifications are also regarded as the protection scope of the present application.

Claims

1. A double-ended stud bolt with anti-slip threads, comprising a double-ended stud bolt body, characterized in that: The double-ended bolt body has external threads at both ends. Nuts are screwed onto the external threads on both sides of the double-ended bolt body. Countersunk holes are formed at the center of the two opposite faces of the nuts. Anti-slip screws are installed in the countersunk holes. A circular groove is formed at the bottom of the anti-slip screw. An anti-slip screw rod is vertically installed in the circular groove. A receiving cavity is formed at the bottom of the anti-slip screw rod. A buffer mechanism is installed inside the receiving cavity. A bearing is installed at the end of the buffer mechanism. A protective plate is installed at the bottom of the bearing. A fastening thread is formed at the bottom of the protective plate. The fastening thread meshes with the external threads of the bolt. A stripping external thread is formed on the upper end of the outer wall of the anti-slip screw rod. The stripping external thread mates with the internal threads of the countersunk holes.

2. The double-ended bolt with anti-slip threads according to claim 1, characterized in that: The buffer mechanism includes a fixed plate installed inside the storage cavity, a telescopic rod vertically installed at the end of the fixed plate, a universal seat installed at the end of the telescopic rod, a universal ball installed inside the universal seat, and a bearing seat fitted inside the portion of the universal ball located outside the universal seat.

3. The double-ended bolt with anti-slip threads according to claim 2, characterized in that: A spring is fitted onto the outside of the telescopic rod between the fixed plate and the universal joint.

4. The double-ended bolt with anti-slip threads according to claim 3, characterized in that: The inner wall of the universal joint is provided with rotating cavities evenly spaced along its axis, and ball bearings are installed inside the rotating cavities, which are fitted together with the universal ball bearings.

5. The double-ended stud with anti-slip threads according to claim 1, characterized in that: The protective plate consists of a rigid plate layer and a corrosion-resistant layer.

6. The double-ended stud with anti-slip threads according to claim 1, characterized in that: The anti-slip screw has an annular rubber sheet and an annular washer fitted inside the countersunk screw hole on its exterior, and a retaining ring is installed at the bottom end of the annular washer.

7. The double-ended stud with anti-slip threads according to claim 6, characterized in that: Rubber blocks are evenly and equidistantly installed on the outer wall of the annular rubber sheet along its axis.

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