Stud bolt with anti-falling structure

Abstract

The utility model relates to a double-end bolt with an anti-drop structure, which comprises a double-end bolt main body, a nut is screwed outside the double-end bolt main body, anti-drop cylinders are assembled at two end parts of the double-end bolt main body, fastening screw rods are inserted in the anti-drop cylinders, fastening screw grooves are arranged at two end parts of the double-end bolt main body, and the double-end bolt main body is connected with the nut. Fixing blocks are installed at the two ends of the anti-falling barrel correspondingly, anti-falling rods are installed at the top ends of the fixing blocks, annular rotating grooves are formed in the bottom ends of the nuts, the top ends of the anti-falling rods are arranged in the annular rotating grooves, buffering cavities are formed in the bottom ends of the anti-falling rods, and limiting mechanisms are installed in the buffering cavities; the end of the limiting mechanism is connected with a fixing block, and anti-disengaging spiral teeth are arranged on the inner wall of the anti-disengaging rod and meshed with the outer threads of the stud body. The technical scheme of the utility model has the technical effects of good tooth withdrawal prevention function, high connection strength and extremely high connection stability.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of stud bolts, and particularly relates to a stud bolt with an anti-dropping structure. BACKGROUND

[0002] Stud bolts are also called stud screws, and both ends of the stud bolt are provided with threads, and are mainly used in automobiles, motorcycles, tower cranes and large-span steel structures to stably connect two components that are not connected to each other, and one end is screwed into the main body, and the other end is provided with a nut after the accessory is installed, and since the accessory is frequently disassembled, the stud bolt is very convenient to replace. In the prior art, the anti-tooth-retreating effect of the stud bolt structure is poor, and the nut on the stud bolt is continuously vibrated to cause tooth retreat, and long-term use can affect the service life of the fastener, and therefore the prior art needs to be improved. SUMMARY

[0003] Based on the above problems, the utility model provides a stud bolt with an anti-dropping structure, which has good anti-tooth-retreating function, high connection strength, high connection stability, is suitable for equipment parts with large connection load strength, and improves the service life.

[0004] To achieve the above object, the utility model provides the following technical scheme: a stud bolt with an anti-dropping structure, comprising a stud bolt body, the outer two ends of the stud bolt body are screw-connected with nuts, the two end portions of the stud bolt body are both assembled with anti-dropping barrels, the inside of the anti-dropping barrel is inserted with a fastening screw rod, the two end portions of the stud bolt body are both provided with fastening screw grooves, the fastening screw rod is screw-connected in the fastening screw groove, the two end portions of the anti-dropping barrel are both installed with fixed blocks, the top end of the fixed block is installed with an anti-dropping rod, the bottom end of the nut is provided with an annular rotating groove, the top end of the anti-dropping rod is arranged in the annular rotating groove, the bottom end of the anti-dropping rod is provided with a buffer cavity, the inside of the buffer cavity is installed with a limiting mechanism, the end portion of the limiting mechanism is connected with the fixed block, the inner wall of the anti-dropping rod is provided with anti-dropping helical teeth, and the anti-dropping helical teeth are engaged with the outer threads of the stud bolt body.

[0005] The two ends of the double-headed bolt body are screwed with nuts, thereby forming a double-headed bolt in the prior art, after the nuts are screwed into the outside of the double-headed bolt body, a anti-escape cylinder is sleeved on the two ends of the double-headed bolt body, a fastening screw rod is arranged in the inside of the anti-escape cylinder, the fastening screw rod and the anti-escape cylinder are concentrically arranged, after the anti-escape cylinder is sleeved on the outside of the double-headed bolt body, the fastening screw rod in the inside is screwed into a fastening screw groove, and the top end of the anti-escape rod is arranged in an annular rotating groove at the bottom end of the nut, the annular rotating groove is arranged at the bottom end of the nut and the outside of the double-headed bolt body, the anti-escape rod is made of hard elastic material, the bottom end of the anti-escape rod is fixed to a fixed block through a limiting mechanism, and the fixed block is arranged on the anti-escape cylinder, the length of the anti-escape rod can be adjusted through the limiting mechanism, and after the top end of the anti-escape rod is arranged in the annular rotating groove, the anti-escape screw thread on the outer wall is clamped on the external screw thread on the outer wall of the double-headed bolt body.

[0006] The utility model further sets up: the limiting mechanism includes piston rod and piston cylinder, the end of piston cylinder is equipped with piston mouth, piston rod is inserted in piston mouth, both ends of piston rod and piston cylinder are installed with fixed plate, and the fixed plate on piston rod is installed in buffer cavity, the fixed plate on piston cylinder is installed on fixed block.

[0007] The piston rod can be inserted and extracted in the inside of the piston mouth, the piston cylinder is fixed to the fixed block through the fixed plate, and the piston rod is installed in the buffer cavity at the bottom end of the anti-escape rod through the fixed plate, so that the distance between the anti-escape rod and the fixed block is adjusted by the extraction and insertion of the piston rod in the piston cylinder, thereby adjusting the height of the anti-escape rod.

[0008] The utility model further sets up: the outside of piston rod and piston cylinder is equipped with reset spring, reset spring is arranged between two fixed plates.

[0009] The piston rod and the piston cylinder are supported by the reset spring.

[0010] The utility model further sets up: the inside of the nut is installed with extrusion plate.

[0011] The utility model further sets up: the outside of the double-headed bolt body is equipped with the protective film.

[0012] The screw rod body of the double-headed bolt body is protected, and the protective film can be torn off during use.

[0013] The utility model further sets up: the bottom of fastening screw rod is installed with rotating disc.

[0014] The fastening screw rod is conveniently rotated by the rotating disc. DRAWINGS

[0015] Figure 1 Structure diagram of the anti-off cylinder and nut of the utility model embodiment.

[0016] Figure 2 Structure diagram of the anti-off cylinder and nut of the utility model embodiment.

[0017] Figure 3 Structure diagram of the anti-off cylinder and nut of the utility model embodiment.

[0018] Figure 4 Structure diagram of the anti-off cylinder and nut of the utility model embodiment.

[0019] In the figure, the meaning of the label: 1 - stud main body; 2 - protective film; 3 - anti-off screw tooth; 4 - fixed block; 5 - extrusion plate; 6 - nut; 7 - anti-off cylinder; 8 - annular rotary groove; 9 - fastening screw groove; 10 - fastening screw; 11 - rotary disc; 12 - anti-off rod; 13 - buffer cavity; 14 - limiting mechanism; 141 - piston rod; 142 - piston port; 143 - piston cylinder; 144 - reset spring; 145 - fixed plate. DETAILED DESCRIPTION

[0020] The specific embodiment is merely an explanation of the utility model, and is not a limitation of the utility model, and a person skilled in the art can make a modification of the embodiment without creative contribution according to the need after reading the specification, but as long as it is within the scope of the claims of the utility model, it is protected by the patent law.

[0021] Reference is made to the accompanying drawings Figures 1-4The utility model discloses a double -end bolt with prevent structure, including double -end bolt main part 1, the both ends of double -end bolt main part 1 are all screwed with nut 6, the both ends of double -end bolt main part 1 are all assembled with prevent cylinder 7, the inside of prevent cylinder 7 is inserted with fastening screw 10, the both ends of double -end bolt main part 1 are all set up fastening screw groove 9, fastening screw 10 is screwed in fastening screw groove 9, the both ends of prevent cylinder 7 are all installed with fixed block 4, the top of fixed block 4 is installed with prevent rod 12, the bottom of nut 6 is set up annular rotation groove 8, the top of prevent rod 12 is set in annular rotation groove 8, the bottom of prevent rod 12 is set up buffer cavity 13, the inside of buffer cavity 13 is installed with limit mechanism 14, the end of limit mechanism 14 is connected fixed block 4, the inner wall of prevent rod 12 is set up prevent helical tooth 16, prevent helical tooth 16 is engaged with the outer thread of double -end bolt main part 1. The both ends of double -end bolt main part 1 are all screwed with nut 6, to form the double -end bolt in the prior art, after the nut 6 is screwed into the outside of double -end bolt main part 1, the both ends of double -end bolt main part 1 are equipped with prevent cylinder 7, the inside of prevent cylinder 7 is installed with fastening screw 10, and prevent cylinder 7 is concentric with fastening screw 10, after prevent cylinder 7 is equipped on the outside of double -end bolt main part 1, the inside fastening screw 10 is screwed into fastening screw groove 9, and the top of prevent rod 12 is set in annular rotation groove 8 at the bottom of nut 6, annular rotation groove 8 is set at the bottom of nut 6 and the outer ring of double -end bolt main part 1, prevent rod 12 is hard elastic material, the bottom of prevent rod 12 is installed fixed block 4 through limit mechanism 14, is installed on prevent cylinder 7 through fixed block 4, and through the setting of limit mechanism 14, the length of prevent rod 12 can be adjusted, and after the top of prevent rod 12 is in annular rotation groove 8, the outer wall prevent helical tooth 16 is clamped on the outer thread of the outer wall of double -end bolt main part 1. Under the action of prevent cylinder 7, the nut 6 in the double -end bolt is circumferentially limited, to prevent the tooth from falling phenomenon that the nut 6 structure rotates, under the engagement of prevent rod 12 and fastening screw 10, the double -end bolt and fastening screw 10 are kept in the stable connection limiting state, have good tooth and fall prevention function, and the connection intensity is high, has very high connection stability, is applicable to the equipment part with greater connection load intensity, improves the service life of double -end bolt.

[0022] The embodiment is further provided with: the limiting mechanism 14 comprises a piston rod 141 and a piston cylinder 143, the end of the piston cylinder 143 is provided with a piston opening 142, the piston rod 141 is inserted into the piston opening 142, the two ends of the piston rod 141 and the piston cylinder 143 are both provided with a fixed plate 145, and the fixed plate 145 on the piston rod 141 is installed in the buffer cavity 13, and the fixed plate 145 on the piston cylinder 143 is installed on the fixed block 4. The piston rod 141 can be inserted and extracted in the piston opening 142, the piston cylinder 143 is fixed on the fixed block 4 through the fixed plate 145, and the piston rod 141 is installed in the buffer cavity 13 at the bottom end of the anti-extraction rod 12 through the fixed plate 145, so that the distance between the anti-extraction rod 12 and the fixed block 4 is realized through the insertion and extraction of the piston rod 141 in the piston cylinder 143, and the height of the anti-extraction rod 12 is adjusted.

[0023] The embodiment is further provided with: the outside of the piston rod 141 and the piston cylinder 143 is sleeved with a reset spring 144, and the reset spring 144 is arranged between the two fixed plates 145. The reset spring 144 can provide support force for the piston rod 141 and the piston cylinder 143.

[0024] The embodiment is further provided with: the outside of the double-headed bolt body 1 is provided with an extrusion plate 5 on the inner side of the nut 6, which is used for cooperating with the nut 6.

[0025] The embodiment is further provided with: the outside of the double-headed bolt body 1 is sleeved with a protective film 2, which is used for protecting the screw rod body of the double-headed bolt body 1 and can be torn off during use.

[0026] The embodiment is further provided with: the bottom end of the fastening screw rod 10 is provided with a rotating disc 11, which is used for facilitating the rotation of the fastening screw rod 10.

[0027] Working principle: in use, firstly, the double-headed bolt body 1 and the nut 6 are installed on a device, then, after the nut 6 is screwed into a fastening position, the anti-extraction cylinder 7 is sleeved on the double-headed bolt body 1, at this time, the fastening screw rod 10 in the anti-extraction cylinder 7 is screwed into the fastening screw groove 9 at the bottom end of the double-headed bolt body 1, after the anti-extraction cylinder 7 is sleeved on the double-headed bolt body 1, the anti-extraction rod 12 is engaged with the external thread of the double-headed bolt body 1, until the top end of the anti-extraction rod 12 is located in the annular rotating groove 8 on the nut 6, the nut 6 is limited, and the nut 6 is prevented from being unscrewed and falling off.

[0028] The above only describes the preferred embodiment of the present application, and it should be noted that, for ordinary technical personnel in the technical field, some improvements and modifications can be made without departing from the technical principle of the present application, and the improvements and modifications of the above assumptions should also be regarded as the protection range of the present application.

Claims

1. A double-headed bolt having a pull-out prevention structure, comprising a double-headed bolt main body, characterized by: The outer ends of the double-headed bolt body are screwed with nuts, the two end portions of the double-headed bolt body are equipped with anti-off barrels, the inside of the anti-off barrel is inserted with a fastening screw rod, the two end portions of the double-headed bolt body are provided with fastening screw grooves, the fastening screw rod is screwed in the fastening screw groove, the two end portions of the anti-off barrel are installed with fixed blocks, the top end of the fixed block is installed with an anti-off rod, the bottom end of the nut is provided with an annular rotating groove, the top end of the anti-off rod is arranged in the annular rotating groove, the bottom end of the anti-off rod is provided with a buffer cavity, the inside of the buffer cavity is installed with a limiting mechanism, the end portion of the limiting mechanism is connected with the fixed block, the inner wall of the anti-off rod is provided with anti-off helical teeth, and the anti-off helical teeth are engaged with the external threads of the double-headed bolt body.

2. The double-end bolt with anti-drop structure according to claim 1, characterized in that: The limiting mechanism comprises a piston rod and a piston barrel, the end portion of the piston barrel is provided with a piston port, the piston rod is inserted in the piston port, the two end portions of the piston rod and the piston barrel are installed with fixed plates, and the fixed plate on the piston rod is installed in the buffer cavity, and the fixed plate on the piston barrel is installed on the fixed block.

3. The double-end bolt with anti-drop structure according to claim 2, characterized in that: The outside of the piston rod and the piston barrel is sleeved with a reset spring, and the reset spring is arranged between the two fixed plates.

4. The double-end bolt with anti-drop structure according to claim 1, characterized in that: The inside of the double-headed bolt body is installed with an extrusion plate.

5. The double-end bolt with anti-drop structure according to claim 1, characterized in that: The outside of the double-headed bolt body is sleeved with a protective film.

6. The double-end bolt with anti-drop structure according to claim 1, characterized in that: The bottom end of the fastening screw rod is installed with a rotating disc.

Images