CN209056853U - Locking perseverance torque thread clamping mechanism - Google Patents

Abstract

The utility model relates to electric power tool fields, specifically locking permanent torque thread clamping mechanism, including U-shaped attachment base, sliding block and loose-proof compacting mechanism, loose-proof compacting mechanism includes the bolt being rotatably connected and anti-loose spot, bolt passes through sliding block and is threadedly coupled therewith, anti- loose spot is opposite with attachment base and cooperatively forms thread clamping mechanism, bolt and the surface that anti-loose spot fits be respectively equipped with can intermeshing first non-return helical teeth and the second non-return helical teeth to limit the opposite anti-loose spot counter-rotating of bolt, the front of anti-loose spot is equipped with the non-return helical teeth circle of third to limit anti-loose spot rotation, bolt is equipped with the first bolt head and the second bolt head, fracture is equipped between first bolt head and the second bolt head.The locking permanent torque thread clamping mechanism of the utility model, when use, are not only not easy to loosen, but also will not damage cable or thread clamping mechanism by pressure because screw-down torque is excessive.

Description

Locking perseverance torque thread clamping mechanism

Technical field

The utility model relates to electric power tool field, specifically locking permanent torque thread clamping mechanism.

Background technique

Thread clamping mechanism is used to electric power tool being fixedly mounted on cable, to be grounded to cable, the maintenance such as electrical verification Operation, is the important component of electric power tool.Currently, thread clamping mechanism will be electric usually using the bolt of cooperation thread clamping mechanism ontology Cable presses against on thread clamping mechanism ontology, to realize the fixation of thread clamping mechanism and cable.But due to being bolted over time It can loosen, especially in the environment of grease is more or high-frequency vibration, be bolted and more easily loosen, will lead to wire holding machine Structure clamping cable even loosens built on the sand, and corresponding electric power tool is caused to can not work normally.In addition, current thread clamping mechanism is used Bolt usually can damage cable or thread clamping mechanism by pressure because screw-down torque is excessive when tightening, although also having one at present A little perseverance torque wrenches, can preset the peak torque for tightening bolt, to solve the above problems, but that structure is complicated is expensive.

Utility model content

To solve the above-mentioned problems, the task of the utility model, which is to provide, a kind of is not only not easy to loosen but also will not be because of tightening Torque is excessive and damages the locking permanent torque thread clamping mechanism of cable or thread clamping mechanism by pressure.

The utility model task is achieved through the following technical solutions:

Locking perseverance torque thread clamping mechanism, including U-shaped attachment base, sliding block and loose-proof compacting mechanism, the opening phase of attachment base Guiding straight trough is equipped with to two sides, sliding block can be inserted into be embedded on attachment base from one end of guiding straight trough, and sliding block is equipped with Screw hole, loose-proof compacting mechanism include bolt and anti-loose spot, and the back side of anti-loose spot and the end of bolt are rotatably connected, bolt Across sliding block screw hole and be threadedly coupled therewith, anti-loose spot is opposite with attachment base bottom and cooperatively forms for clamping cable Thread clamping mechanism, the surface that bolt and anti-loose spot fit is respectively equipped with being capable of intermeshing first non-return helical teeth circle and second The helical teeth of non-return helical teeth circle, the first non-return helical teeth circle screws contrary direction inclination, the second non-return helical teeth towards with bolt The helical teeth of circle, towards on the contrary, to limit the opposite anti-loose spot counter-rotating of bolt, is prevented towards with the helical teeth of the first non-return helical teeth circle The front of loose spot is equipped with the non-return helical teeth circle of third, the helical teeth court of the helical teeth direction and the first non-return helical teeth circle of the non-return helical teeth circle of third To identical, to limit the relatively clamped cable counter-rotating of anti-loose spot；The rear end of the bolt is successively arranged first along axial direction Bolt head and the second bolt head are equipped with fracture between the first bolt head and the second bolt head, what the fracture was able to bear Peak torque is less than the peak torque that bolt other parts are able to bear, when the torque that the first bolt head is born is greater than fracture energy When the peak torque enough born, fracture can be broken to be detached from the first bolt head from bolt.

It is preferred that the structure of the fracture is that the annular groove of the bolt outer surface is arranged in and/or is arranged in bolt Internal inner hole.

The beneficial effects of the utility model are: 1. in use, positive screwing bolts, bolt with locking piece of press cable, Since anti-loose spot front is equipped with the non-return helical teeth circle of third, anti-loose spot can be limited with respect to cable counter-rotating, then stopped by second Inverse helical teeth circle is engaged with the first non-return helical teeth circle, and then prevents bolt from relatively anti-loose spot counter-rotating, even if to guarantee Be bolted the time compared with long and grease is more, high-frequency vibration in the environment of, bolt will not all loosen；2. be arranged fracture and Two bolt heads can according to need the maximum receiving torque for being pre-designed fracture, thus when making to screw subassembly of lock bolt, Reach fracture it is maximum bear torque when be broken and make the disengaging of the first bolt head, will not because screw torque it is excessive due to damage by pressure Cable or thread clamping mechanism, and bolt can be unscrewed when needing demounting bolt by the second bolt head counter force, kept away Exempting from bolt can not dismantle and cause maintenance inconvenient.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of locking perseverance torque thread clamping mechanism in embodiment 1；

Fig. 2 is the decomposition texture schematic diagram of Fig. 1.

Wherein, loose-proof compacting mechanism 1, bolt 11, the first bolt head 111, the second bolt head 112, fracture 113, annular Groove 1131, inner hole 1132, the first non-return helical teeth circle 114, anti-loose spot 12, the second non-return helical teeth circle 121, the non-return helical teeth circle of third 122, attachment base 2 is oriented to straight trough 21, sliding block 3, screw hole 31.

Specific embodiment

In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation Example, the present invention will be further described in detail.It should be appreciated that saying that the specific embodiment of description is used only for explaining herein The utility model is not used to limit the utility model.

As shown in Figure 1, 2, locking permanent torque thread clamping mechanism, including U-shaped attachment base 2, sliding block 3 and loose-proof compacting mechanism 1, even The opening opposite sides of joint chair 2 is equipped with guiding straight trough 21, and sliding block 3 can be inserted into be embedded in from one end of guiding straight trough 21 On attachment base 2, sliding block 3 is equipped with screw hole 31, and loose-proof compacting mechanism 1 includes bolt 11 and anti-loose spot 12, the back side of anti-loose spot 12 It is rotatably connected with the end of bolt 11, bolt 11 passes through the screw hole 31 of sliding block 3 and is threadedly coupled therewith, anti-loose spot 12 is opposite with the bottom of attachment base 2 and cooperatively form thread clamping mechanism for clamping cable.Bolt 11 fits with anti-loose spot 12 Surface be respectively equipped with can intermeshing first non-return helical teeth circle 114 and the second non-return helical teeth circle 121, the first non-return helical teeth The helical teeth of circle 114 towards and bolt 11 screw contrary direction and tilt, the helical teeth of the second non-return helical teeth circle 121 is towards with the The helical teeth of one non-return helical teeth circle 114 is towards on the contrary, to limit relatively anti-12 counter-rotating of loose spot of bolt 11, and anti-loose spot 12 is just Face is equipped with the non-return helical teeth circle 122 of third, the helical teeth of the helical teeth direction and the first non-return helical teeth circle 114 of the non-return helical teeth circle 122 of third Towards identical, to limit the relatively clamped cable counter-rotating of anti-loose spot 12.In use, positive screwing bolts 11, bolt 11 Cable is pressed with anti-loose spot 12, since anti-12 front of loose spot is equipped with the non-return helical teeth circle 122 of third, anti-12 phase of loose spot can be limited To cable counter-rotating, then engaging by the second non-return helical teeth circle 121 and the first non-return helical teeth circle 114, and then make bolt 11 Cannot relatively anti-12 counter-rotating of loose spot, even if to guarantee 11 Connection Time of bolt compared with long and grease is more, high frequency vibrating Under dynamic environment, bolt 11 will not all loosen.

The rear end of bolt 11 is successively arranged the first bolt head 111 and the second bolt head 112, the first bolt head 111 along axial direction And second be equipped with fracture 113 between bolt head 112, the peak torque that fracture 113 is able to bear is less than other portions of bolt 11 Divide the peak torque being able to bear, when the torque that the first bolt head 111 is born is greater than the peak torque that fracture 113 is able to bear When, fracture 113 can be broken to be detached from the first bolt head 111 from bolt 11.The structure of fracture 113 is to be arranged in spiral shell The annular groove 1131 of 11 outer surface of bolt and the inner hole 1132 being arranged in inside bolt 11, to make the wall thickness at fracture 113 It is smaller and be broken at first when bearing torque, certainly, it may be otherwise and irregular shrinkage pool, fracture are set at fracture 113 Lines etc., so that fracture 113 is broken at first when bearing torque.

First bolt head 111, the second bolt head 112 and fracture 113 are set, can according to need and be pre-designed fracture The maximum of portion 113 bears torque, in use, can first pass through the first bolt head 111 screws loose-proof compacting mechanism 1, it is disconnected reaching It is broken i.e. from fracture 113 when splitting the maximum receiving torque in portion 113 and is detached from the first bolt head 111, it in this way will not be because of rotation Tight torque is excessive and damages cable or thread clamping mechanism by pressure, so that torque when loose-proof compacting mechanism 1 screws tight is controllable, and can need When dismantling loose-proof compacting mechanism 1, loose-proof compacting mechanism 1 can be unscrewed by 112 counter force of the second bolt head, avoided locking Hold-down mechanism 1 can not be dismantled and cause maintenance inconvenient.

Above description is only the preferred embodiment of the application and the explanation to institute's application technology principle.Those skilled in the art Member is it should be appreciated that utility model range involved in the application, however it is not limited to made of the specific combination of above-mentioned technical characteristic Technical solution, at the same should also cover do not depart from the utility model design in the case where, by above-mentioned technical characteristic or its be equal Feature carries out any combination and other technical solutions for being formed.Such as features described above and (but being not limited to) disclosed herein have The technical solution for thering is the technical characteristic of similar functions to be replaced mutually and being formed.

Claims (2)

1. locking perseverance torque thread clamping mechanism, which is characterized in that including U-shaped attachment base, sliding block and loose-proof compacting mechanism, attachment base Opening opposite sides is equipped with guiding straight trough, and sliding block can be inserted into be embedded on attachment base from one end of guiding straight trough, sliding Block is equipped with screw hole, and loose-proof compacting mechanism includes bolt and anti-loose spot, and the back side of anti-loose spot and the end of bolt can be rotated Connection, bolt pass through the screw hole of sliding block and are threadedly coupled therewith, and anti-loose spot is opposite with attachment base bottom and cooperatively forms use In the thread clamping mechanism of clamping cable, the surface that bolt and anti-loose spot fit be respectively equipped with can intermeshing first it is non-return tiltedly The helical teeth of gear ring and the second non-return helical teeth circle, the first non-return helical teeth circle screws contrary direction inclination towards with bolt, the The helical teeth of two non-return helical teeth circles towards with the helical teeth of the first non-return helical teeth circle towards on the contrary, inverse to limit the opposite anti-loose spot of bolt To rotation, the front of anti-loose spot is equipped with the non-return helical teeth circle of third, helical teeth direction and the first non-return helical teeth of the non-return helical teeth circle of third The helical teeth of circle is towards identical, to limit the relatively clamped cable counter-rotating of anti-loose spot；The rear end of the bolt along axial direction according to It is secondary to be equipped with the first bolt head and the second bolt head, fracture, the fracture are equipped between the first bolt head and the second bolt head The peak torque being able to bear is less than the peak torque that bolt other parts are able to bear, when the torque that the first bolt head is born is big When the peak torque that fracture is able to bear, fracture can be broken to be detached from the first bolt head from bolt.

2. locking permanent torque thread clamping mechanism according to claim 1, which is characterized in that the structure of the fracture is that setting exists The annular groove of the bolt outer surface and/or the inner hole being arranged in inside bolt.