Anti-loosening bolt

Abstract

The anti-loosening bolt comprises a bolt body and a nut, the bolt body comprises a bolt head portion and a screw portion, a sliding block groove is formed in the side, back on to the screw portion, of the bolt head portion, the two ends of the sliding block groove are communicated with movable grooves, and a slidable driving block is arranged in the sliding block groove in a clamped mode. The two ends of the driving block are provided with transmission racks extending into the movable grooves, the groove bottoms of the movable grooves are provided with threaded holes, the threaded holes penetrate through the bolt head and are parallel to the screw rod part, a lifting screw rod screwed with the threaded holes is arranged in the threaded holes, the end, close to the screw rod part, of the lifting screw rod is provided with anti-skid teeth, and the other end of the lifting screw rod is coaxially connected with a transmission gear. The transmission gear is meshed with the transmission rack; the driving block is pushed to drive the anti-skid teeth to stretch out towards the screw part, after the bolt is loosened, the anti-skid teeth further stretch out to maintain pressure, the bolt is temporarily fixed in the absence of tools, and hidden dangers caused by bolt loosening are avoided.

Description

Technical Field

[0001] The invention relates to the technical field of fasteners, and in particular to an anti-loosening bolt. Background Art

[0002] During the connection process of traditional bolts, the vibration of the equipment may cause the nut to reverse on the bolt, causing the bolt to loosen. Existing anti-loosening bolts use the principle of forward and reverse rotation to prevent the bolt from loosening. When the friction fails, the reverse thread setting of the fastening nut and the locking nut increases the pre-tightening force of the locking nut when the fastening nut loosens naturally; however, in the case of high vibration frequencies, the nuts will still loosen, and it is difficult to temporarily tighten the bolts without tools, and the equipment cannot continue to operate safely. Therefore, designing an anti-loosening bolt that can be operated quickly and does not require tools for temporary reinforcement has become a technical problem that needs to be solved urgently. Summary of the invention

[0003] In order to solve the above problems, the present invention provides an anti-loosening bolt.

[0004] The technical solution of the utility model is a kind of anti-loosening bolt, including a bolt body and a nut, the bolt body including a bolt head and a screw rod part, the bolt head is provided with a slider groove on the side facing away from the screw rod part, the two ends of the slider groove are connected with movable grooves, a slidable driving block is provided inside, the two ends of the driving block are provided with transmission racks extending into the movable groove, the groove bottom of the movable groove is provided with a threaded hole, the threaded hole passes through the bolt head and is parallel to the screw rod part, a lifting screw engaged with it is provided in the threaded hole, the lifting screw is provided with anti-slip teeth on one end close to the screw rod part, and a transmission gear is coaxially connected to the other end, and the transmission gear is meshed with the transmission rack.

[0005] After adopting the above structure, after the nut is tightened on the screw part, the driving block is pushed to move along the slider groove, and the transmission racks at both ends drive the transmission gear to rotate. The rotation of the transmission gear causes the lifting screw to rotate, and cooperates with the threaded hole to move the lifting screw. On the one hand, the lifting screw pulls the gear teeth of the transmission gear, and keeps the two meshing while moving on the transmission rack. On the other hand, the anti-slip teeth are pushed to extend toward the screw part and press on the object fastened by the bolt, increasing the pressure to prevent the bolt from reversing and loosening; and after the bolt is loosened, the anti-slip teeth can be further extended to maintain the pressure, and the bolt can be temporarily fixed in the absence of tools to avoid hidden dangers caused by loose bolts.

[0006] As a further improvement of the utility model, a plurality of positioning grooves are provided on one side of the slider groove, and the positioning grooves are arranged at intervals along the length direction of the slider groove; a protruding positioning bead is provided on the side of the driving block, and the size and position of the positioning bead correspond to the positioning groove.

[0007] After adopting the above structure, when the driving block is pushed, the positioning beads are pressed to pass over the groove wall of the slider groove and enter different positioning grooves, so as to unitize the moving distance of the driving block and more accurately control the driving of the driving block to extend the anti-skid teeth and avoid damage to the anti-skid teeth caused by excessive pressure.

[0008] As a further improvement of the utility model, a contraction hole for accommodating a positioning bead is provided on the side of the driving block, a supporting spring connected to the positioning bead is provided at the bottom of the contraction hole, and one side of the positioning bead extends out of the contraction hole.

[0009] After adopting the above structure, the supporting spring is used to push the positioning bead out of the shrinkage hole so that the positioning bead can be stuck in the positioning groove; when the driving block moves, the positioning bead is pressed back into the shrinkage hole, and after the positioning bead is realigned with a different positioning groove, the supporting spring pushes the positioning bead out, reducing the wear caused by the positioning bead squeezing the groove wall of the slider.

[0010] As a further improvement of the present invention, the side of the driving block facing the notch of the slider slot is provided with anti-slip grooves.

[0011] After adopting the above structure, the anti-skid pattern is provided on one side of the driving block facing the notch of the slider slot, so that the resistance is increased when the driving block is pushed, so as to facilitate applying sufficient thrust to the narrow parts on the bolt head.

[0012] As a further improvement of the utility model, lubricating grease is coated between the transmission rack and the transmission gear.

[0013] After adopting the above structure, grease is applied between the transmission rack and the transmission gear, so that when the gear teeth of the transmission gear move, the wear and resistance between the transmission rack and the transmission gear are reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 Shown is a schematic diagram of the structure of the utility model.

[0015] Figure 2 Shown is a schematic diagram of the slider slot structure.

[0016] Figure 3 Shown is a schematic diagram of the cross-sectional structure of the shrinkage hole.

[0017] 1- nut, 2- bolt head, 3- screw part, 4- slider groove, 5- movable groove, 6- driving block, 7- transmission rack, 8- threaded hole, 9- lifting screw, 10- anti-skid teeth, 11- transmission gear, 12- positioning groove, 13- positioning bead, 14- contraction hole, 15- support spring, 16- anti-skid pattern. DETAILED DESCRIPTION

[0018] like Figure 1-Figure 3An anti-loosening bolt is shown, comprising a bolt body and a nut 1, wherein the bolt body comprises a bolt head 2 and a screw portion 3, a slider groove 4 is provided on the side of the bolt head 2 facing away from the screw portion 3, both ends of the slider groove 4 are connected with movable grooves 5, a slidable driving block 6 is provided inside, both ends of the driving block 6 are provided with a transmission rack 7 extending into the movable groove 5, a threaded hole 8 is provided at the bottom of the movable groove 5, the threaded hole 8 passes through the bolt head 2 and is parallel to the screw portion 3, a lifting screw 9 is screwed together in the threaded hole 8, an end of the lifting screw 9 close to the screw portion 3 is provided with an anti-slip tooth 10, and the other end is coaxially connected with a transmission gear 11, and the transmission gear 11 is meshed with the transmission rack 7.

[0019] After the nut 1 is tightened on the screw part 3, the driving block 6 is pushed to move along the slider groove 4, and the transmission racks 7 at both ends drive the transmission gear 11 to rotate. The rotation of the transmission gear 11 causes the lifting screw 9 to rotate, and cooperates with the threaded hole 8 to move the lifting screw 9. On the one hand, the lifting screw 9 pulls the gear teeth of the transmission gear 11, and keeps the two meshing while moving on the transmission rack 7. On the other hand, the anti-skid teeth 10 are pushed to extend toward the screw part 3 and press on the object fastened by the bolt, increasing the pressure to prevent the bolt from reversing and loosening; and after the bolt is loosened, the anti-skid teeth 10 can be further extended to maintain the pressure, and the bolt can be temporarily fixed in the absence of tools to avoid hidden dangers caused by loose bolts.

[0020] A plurality of positioning grooves 12 are provided on one side of the slider groove 4 , and the positioning grooves 12 are arranged at intervals along the length direction of the slider groove 4 ; a protruding positioning bead 13 is provided on the side of the driving block 6 , and the size and position of the positioning bead 13 correspond to the positioning groove 12 .

[0021] When the driving block 6 is pushed, the positioning beads 13 are pressed to pass over the groove wall of the slider groove 4 and enter different positioning grooves 12, so that the moving distance of the driving block 6 is unitized, and the driving block 6 is more accurately controlled to drive the anti-skid teeth 10 to extend to a certain extent, thereby avoiding damage to the anti-skid teeth 10 caused by excessive pressure.

[0022] A contraction hole 14 for accommodating the positioning bead 13 is provided on the side of the driving block 6 , a supporting spring 15 connected to the positioning bead 13 is provided at the bottom of the contraction hole 14 , and one side of the positioning bead 13 extends out of the contraction hole 14 .

[0023] The support spring 15 is used to push the positioning bead 13 out of the contraction hole 14 so that the positioning bead 13 can be inserted into the positioning groove 12; when the driving block 6 moves, the positioning bead 13 is pressed back into the contraction hole 14, and after the positioning bead 13 is realigned with a different positioning groove 12, the support spring 15 pushes the positioning bead 13 out, reducing the wear caused by the positioning bead 13 squeezing the wall of the slider groove 4.

[0024] The driving block 6 is provided with an anti-slip pattern 16 on one side facing the notch of the slider slot 4 .

[0025] An anti-slip pattern 16 is provided on one side of the driving block 6 facing the notch of the slider slot 4 , so as to increase the resistance when the driving block 6 is pushed, thereby facilitating applying sufficient thrust to the narrow parts on the bolt head 2 .

[0026] Lubricating grease is coated between the transmission rack 7 and the transmission gear 11 .

[0027] By coating grease between the transmission rack 7 and the transmission gear 11 , when the gear teeth of the transmission gear 11 move, the wear and resistance between the transmission rack 7 and the transmission gear 11 are reduced.

Claims

1. An anti-loosening bolt, comprising a bolt body and a nut (1), wherein the bolt body comprises a bolt head (2) and a screw shaft (3), characterized in that: A slider groove (4) is provided on the side of the bolt head (2) facing away from the screw rod (3), and the two ends of the slider groove (4) are connected to movable grooves (5), and a slidable driving block (6) is provided inside. The two ends of the driving block (6) are provided with transmission racks (7) extending into the movable groove (5), and the bottom of the movable groove (5) is provided with a threaded hole (8), and the threaded hole (8) passes through the bolt head (2) and is parallel to the screw rod (3). A lifting screw (9) is screwed in the threaded hole (8), and an anti-slip tooth (10) is provided at one end of the lifting screw (9) close to the screw rod (3), and a transmission gear (11) is coaxially connected to the other end, and the transmission gear (11) is meshed with the transmission rack (7).

2. The anti-loosening bolt according to claim 1, characterized in that: A plurality of positioning grooves (12) are provided on one side of the slider groove (4), and the positioning grooves (12) are arranged at intervals along the length direction of the slider groove (4); a protruding positioning bead (13) is provided on the side of the driving block (6), and the size and position of the positioning bead (13) correspond to the positioning groove (12).

3. The anti-loosening bolt according to claim 2, characterized in that: A contraction hole (14) for accommodating a positioning bead (13) is provided on the side of the driving block (6); a supporting spring (15) connected to the positioning bead (13) is provided at the bottom of the contraction hole (14); and one side of the positioning bead (13) extends out of the contraction hole (14).

4. The anti-loosening bolt according to claim 1, characterized in that: The driving block (6) is provided with an anti-slip pattern (16) on one side facing the notch of the slider slot (4).

5. The anti-loosening bolt according to claim 1, characterized in that: Lubricating grease is coated between the transmission rack (7) and the transmission gear (11).

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