CN202251342U

CN202251342U - Fixed torque nut

Info

Publication number: CN202251342U
Application number: CN2011203690674U
Authority: CN
Inventors: 申利宾; 钟志军; 王兵
Original assignee: R&T (XIAMEN) PLUMBING Inc
Current assignee: Xiamen R&T Plumbing Technology Co Ltd
Priority date: 2011-09-29
Filing date: 2011-09-29
Publication date: 2012-05-30
Anticipated expiration: 2021-09-29

Abstract

A fixed torque nut includes a driving piece provided with an inner hole, and a locking piece provided with internal threads in the middle part, wherein the locking piece is sleeved in the inner hole of the driving piece for rotation in a matched manner; at least one spring sheet provided with a deformation part bent to the forward screw direction is arranged in the circumferential direction of the locking piece; the wall of the inner hole comprises at least two displacement force application surfaces taking the inner hole as the center; and the deformation surface and the non-deformation surface on the deformation part of each spring sheet are jointed with the two adjacent force application surfaces respectively. Under a certain torque, the driving piece drives the locking piece to lock tightly through the spring sheets and then is continued to be screwed in the forward direction, the deformation parts of the spring sheets are radially shrunk and deformed to slide continuously along the wall of the inner hole, and then the driving piece rotates in a no-load state; when the driving piece is screwed in the reverse direction, the wall of the inner hole is propped against the non-deformation surfaces of the spring sheets, the spring sheets with no deformation drive the locking piece to be unscrewed in the reverse direction and get out of the driving piece; as the force arm for reverse screw is bigger than the force arm for forward screw, the locking piece is more labor-saving when being unscrewed; and the maximum torque force of the spring sheets exerted on the locking piece can be controlled through rotating the wall of the inner hole of the driving piece, components cannot be damaged, the service life of the fixed torque nut is prolonged, and the fixed torque nut can be used repeatedly.

Description

A kind ofly decide torque nut

Technical field

The utility model relates to a kind of screw-threaded coupling part of torque setting, especially a kind ofly decides torque nut.

Background technique

Bolt and nut is widely used at mechanical field; But common bolt and nut does not have maximum torque to be set, thereby need use and decide the torsion nut, to prevent excessive helical pressure damage equipment or to damage bolt and nut; The whole world is existing decides that torsion nut patent is more representational to be had: 1. will decide the torsion nut among the U.S. Pat 2004033118A1 and be divided into two-part: actuator and nut; Groove is set on actuator, salient point is set on nut cooperates with it, when actuator is screwed into certain torsion; Salient point skids off from groove, makes actuator can not continue to increase torsion; But it can not confirm limit torque value accurately, and the problem that exists limit torque value lower nut assembly to be difficult for withdrawing from.2. former Soviet Union's patent SU566034A1 is divided into two-part with deciding the torsion nut; Different is two all is groove, and groove and groove cooperatively interact, and between two grooves, insert bar; Control torsion, can change limit torque value through changing different bars; Though the control limit torque value does not still solve the problem that limiting value lower nut assembly is difficult for withdrawing from very easily.3. the US7029216 of U.S. Fluidmaster is provided with the projection with monocline face on nut, with the actuator groove fit, can better under limit torsion, withdraw from nut assembly; Though this nut assembly withdraws from more easily, definite value is inaccurate, and permanent deformation appears in stuck point easily, can not be repeatedly used.

The model utility content

For addressing the above problem, the utility model aims to provide a kind of torque nut of deciding.

The utility model addresses the above problem the technological scheme that is adopted: a kind ofly decide torque nut; Comprise that one has the actuator and a middle tapped locking element of endoporus; Locking element is placed in the endoporus of actuator and is rotatably assorted; It is characterized in that: the circumferential variant part that is provided with at least of locking element is towards the crooked shell fragment of dextrorotation direction; Inner hole wall is made up of two displacement force surfaces that with the endoporus are the center at least, and deformation plance on the variant part of shell fragment and non-deformation plance are fitted with two adjacent force surfaces respectively.

Said deformation plance, non-deformation plance, force surface are preferably the plane.

Described actuator is the round-meshed hexagonal swivel nut in top, and circular hole and female threaded shaft are to contraposition; Described endoporus is to have the inner hexagonal hole that six force surfaces constitute; Described shell fragment has six, and six shell fragments are evenly spaced apart to make progress in locking element week.Locking element is screwed under certain torsional interaction of actuator; When this moment, actuator rotated with respect to locking element dextrorotation damping; The force surface of the actuator endoporus radially deformation plance of roof pressure shell fragment shrinks to the locking element center; The variant part of shell fragment is slided on inner hole wall, make actuator further drive locking element and further lock, actuator is unloaded to rotate.When needs oppositely unscrew locking element; The derotation actuator; The non-deformation plance of the force surface roof pressure shell fragment variant part of endoporus, not contraction deformation of shell fragment can make the derotation of actuator drive locking element unscrew and withdraw from; Therefore the arm of force of the centrosymmetric two non-deformation plances of the utility model locking element can use less torsion can unscrew locking element greater than the arm of force of two deformation plances.

Inner hexagonal hole bottom extension one annulus on the described actuator; The bottom of described locking element is provided with the disk that is interlocked with circle ring inner wall; The annulus of the disk of locking element bottom and actuator bottom interlocks, and with the locking element axial limiting, makes actuator and locking element be rotatably assorted and link into an integrated entity, and the locking face of disk as locking element.

Described disk ring is along being provided with limited step, and described circle ring inner wall is provided with some buckles that block mutually with limited step; Cooperate with limited step through buckle, locking element is limited in the actuator endoporus rotates.

The beneficial effect of the utility model is: under certain moment of torsion, make actuator pass through shell fragment and drive locking element locking, under this moment of torsion, continue the dextrorotation actuator, shell fragment variant part radial contraction is out of shape along the inner hole wall Continuous Sliding, and actuator is unloaded to rotate; The derotation actuator, the non-deformation plance of inner hole wall roof pressure shell fragment, the indeformable drive locking element counter-rotating of shell fragment unscrews to be withdrawed from; Because the locking element derotation arm of force is bigger than the dextrorotation arm of force; Therefore it is more laborsaving to unscrew locking element, and rotates the acrotorque that the control shell fragment is loaded into locking element through the actuator inner hole wall, can defective component; Prolong the working life of the utility model, can be repeatedly used.

Description of drawings

Fig. 1 is the assembling stereochemical structure decomposing schematic representation of the utility model.

Fig. 2 is the perspective view of the utility model.

Fig. 3 is the perspective view of the utility model locking element.

Fig. 4 is the plan view of the utility model locking element.

Fig. 5 is the worm's eye view of the utility model locking element.

Fig. 6 is the plan view of the utility model actuator.

Fig. 7 is the rear view of the utility model actuator.

Fig. 8 is the structure sectional view of the utility model actuator.

Fig. 9 is the force structure sectional view of the utility model dextrorotation state.

Figure 10 is that the utility model is by the structure sectional view of inner hole wall compressive strain.

Figure 11 is the force structure sectional view of the utility model derotation state.

Accompanying drawing sign among the figure: 10. locking element; 11. internal thread; 12. shell fragment; 13. variant part; 131. deformation plance; 132. non-deformation plance; 14. disk; 141. limited step; 20. actuator; 21. hexagonal swivel nut; 22. circular hole; 23. annulus; 24. inner hexagonal hole; 241. force surface (inner hole wall); 25. circle ring inner wall; 26. buckle.

Embodiment

Below in conjunction with accompanying drawing and embodiment the utility model is further specified.

As Fig. 1With Fig. 2Shown a kind of torque nut of deciding has in the middle of the actuator 20 and of inner hexagonal hole 24 locking element 10 of band internal thread 11 by one and forms; As Fig. 3～ Fig. 5Shown in; With the right-handed thread is example; The circumferentially evenly spaced apart of the locking element 10 of the utility model is fixed with six variant parts 13 towards the crooked shell fragment 12 of dextrorotation direction, but be provided with can be by a non-deformation plance 132 of a deformation plance 131 of radially roof pressure contraction deformation and rotation direction roof pressure for the variant part 13 of shell fragment 12, because the stressed arm of force of deformation plance is bigger; Be easy to generate radial deformation, but not the stressed arm of force of deformation plance rotation direction is almost nil so be not easy distortion; The bottom of locking element 10 is provided with disk 14, and disk 14 rings are along being provided with limited step 141; As shown in Figure 5, the gap can be provided with between shell fragment 12 and the disk 14, but when increasing preset torque if desired, this gap can be cancelled, shell fragment 12 and disk are made of one.As Fig. 6～ Fig. 8Shown in, the utility model actuator 20 have the hexagonal swivel nut 21 of circular hole 22 for the top, the endoporus of described actuator 20 is to have the inner hexagonal hole 24 that six force surfaces 241 constitute; Inner hexagonal hole 24 bottom extensions one annulus 23 on the actuator 20, annulus 23 inwalls 25 are provided with six buckles 26; As Fig. 3, Fig. 6 and Fig. 9Shown in; Locking element 10 is inserted in the inner hexagonal hole 24 of actuator 20; Limited step 141 on locking element 10 bottom discs 14 is spacing with buckle 26 fasteners on actuator 20 bottom annulus 23 inwalls; Deformation plance 131 on the variant part 13 of shell fragment 12 all fits with inner hexagonal hole 24 interior force surfaces 241 (hole wall of inner hexagonal hole 24) with non-deformation plance 132, and two force surfaces 241 that promptly deformation plance 131 on the variant part 13 of each shell fragment 12 and non-deformation plance 132 are adjacent with corresponding inner hexagonal hole 24 1 interior angles are respectively fitted; The circular hole 22 at actuator 20 tops 20 and the internal thread 11 axial contrapositions at locking element 10 centers; As Fig. 2 and Fig. 9Shown in, the assembling of the utility model is accomplished.

As Fig. 9 and Figure 10Shown in, when 20 rotations of dextrorotation actuator, the deformation face 131 of force surface 241 roof pressure shell fragments 12 variant parts 13 of the inner hexagonal hole 24 of actuator 20 makes shell fragment 12 drive locking elements 10 dextrorotations and rotates, and F is the force direction that receives of locking element 10 and actuator 20 among the figure; When locking element 10 is locked under certain and moment of torsion; Be rotated further actuator 20 this moment; Then the deformation face 131 of the variant part 13 of the force surface 241 roof pressure shell fragments 12 of inner hexagonal hole 24 is to the contraction deformation that radially bends of locking element 10; Shell fragment 12 slides along the force surface 241 of inner hexagonal hole 24, and promptly actuator 20 can't further drive the locking element rotation lock through shell fragment 12, then actuator unloaded rotation under this torsional interaction.As Figure 11Shown in; Need unscrew the latch fitting 10 of above-mentioned locking when withdrawing from; Derotation rotating drive part 20, the force surface 241 of the inner hexagonal hole 24 of actuator 20 counter-rotating spin up roof pressure shell fragment 12 variant parts 13 non-deformation plance 132, i.e. the non-deformation plance 132 that force surface 241 counter-rotating roof pressure shell fragments 12 variant parts 13 are arranged of inner hexagonal hole 24; 10 derotations of shell fragment 12 drive locking elements unscrew to be withdrawed from, i.e. actuator 20 derotations load locking element 10 counter-rotatings and withdraw from.Because locking element 10 unscrews the moment that required moment equals to screw,, therefore can use less torsion can unscrew locking element 10 because of the arm of force of the utility model locking element 10 centrosymmetric two non-deformation plances 131 the arm of force greater than two deformation plances 132.

Above embodiment only supplies to explain the usefulness of the utility model; But not to the restriction of the utility model, those skilled in the art are under the situation of spirit that does not break away from the utility model and scope; Can also make various conversion or variation; Therefore, all technological schemes that are equal to also should belong to the category of the utility model, are limited each claim.

Claims

1. decide torque nut for one kind; Comprise that one has the actuator and a middle tapped locking element of endoporus; Locking element is placed in the endoporus of actuator and is rotatably assorted; It is characterized in that: the circumferential variant part that is provided with at least of locking element is towards the crooked shell fragment of dextrorotation direction, and inner hole wall is made up of two displacement force surfaces that with the endoporus are the center at least, and deformation plance on the variant part of shell fragment and non-deformation plance are fitted with two adjacent force surfaces respectively.

2. a kind of torque nut of deciding as claimed in claim 1 is characterized in that: said deformation plance, non-deformation plance, force surface are the plane.

3. according to claim 1 or claim 2 a kind of decides torque nut, and it is characterized in that: described actuator is the round-meshed hexagonal swivel nut in top, and circular hole and female threaded shaft are to contraposition; Described endoporus is to have the inner hexagonal hole that six force surfaces constitute; Described shell fragment has six, and six shell fragments are evenly spaced apart to make progress in locking element week.

4. according to claim 1 or claim 2 a kind of decides torque nut, it is characterized in that: inner hexagonal hole bottom extension one annulus on the described actuator; The bottom of described locking element is provided with the disk that is interlocked with circle ring inner wall.

5. a kind of torque nut of deciding as claimed in claim 4 is characterized in that: the ring of described disk is along being provided with limited step, and described circle ring inner wall is provided with some buckles that block mutually with limited step.