CN207500292U

CN207500292U - Fastener

Info

Publication number: CN207500292U
Application number: CN201721215011.7U
Authority: CN
Inventors: 孙愉后
Original assignee: 孙愉后
Current assignee: Fujian Jinjiang City Lijing Automobile Parts Co., Ltd.
Priority date: 2017-09-21
Filing date: 2017-09-21
Publication date: 2018-06-15
Anticipated expiration: 2027-09-21

Abstract

A kind of fastener, including tightening piece (1) and annular element (2), the tightening piece (1) is configured to be combined to fasten by fastener with cooperation screw rod, and the tightening piece includes：First main part (11), and the connecting portion (12) of annular, the connecting portion is formed with external screw thread (121) from first main part (11) towards being extended by fastener on the lateral surface of the connecting portion (12)；The annular element includes：Second main part (21), internal thread (211) is formed on the second main part medial surface, the internal thread is combined with the external screw thread to be suitable for the connecting portion (12) being screwed into second main part (21)；The external screw thread (121) of the connecting portion is identical with the externally threaded hand of spiral of the cooperation screw rod, and the first helix angle of the external screw thread (121) of the connecting portion is more than the helix angle of the cooperation screw rod, so that the further pine of the tightening piece is hindered to move back when tightening piece pine moves back.

Description

Fastener

Technical field

The utility model is related to a kind of locking fasteners more particularly to a kind of further pine for realizing inhibition tightening piece to move back Fastener.

Background technology

Fastener is applied in all trades and professions of connection fastening demand, such as in vehicle, building machinery, agricultural machine It is all widely used in tool, manufacture machinery etc..For in large-scale engineering machinery or engineering truck, due to working environment it is severe with And the effect of heavy load so that fastener thereon by the vibration of all directions and impacting for load, this cause fastener compared with It easily loosens, so as to which the reduction of fastener function be caused even to fail.Cause very big security risk.

Currently used fastener locking method generally comprises the locking of non-removable locking scheme and increasing friction force Scheme.Non-removable locking scheme is changed into detachable threaded connection not using welding, bonding or rushing a little modes such as riveting It is detachable to be threadedly coupled.In non-removable locking scheme, fastener cannot be reused, and troublesome in poeration, be usually used in certain It is required that anti-loosening property is high and is not required to the important events of dismounting.The locking scheme of increasing friction force is using increasing between screw thread or bolt The method of the frictional force of (screw) head and nut end face is locking to achieve the purpose that.The locking scheme of increasing friction force is not by space Limitation, can dismantle repeatedly, but reliability is poor, in work after a certain period of time, locking effect can be reduced because of reasons such as vibrations Fruit.

Utility model content

The technical issues of the utility model solves is to provide a kind of fastener, by between tightening piece and annular element Helicitic texture cooperation so that tightening piece is more loose to move back, tighter for the coupling mechanism force of tightening piece, causes tightening piece that can not loosen, So as to play the role of that the further pine of tightening piece is inhibited to move back.

According to the embodiment of the utility model one side, provide a kind of fastener, the fastener include tightening piece and Annular element, the tightening piece are configured to be combined with cooperation screw rod to fasten by fastener, and the tightening piece includes the first main body Portion and the connecting portion of annular, the connecting portion is extended from first main part direction by fastener, outside the connecting portion External screw thread is formed on side；The annular element includes the second main part, and interior spiral shell is formed on the second main part medial surface Line, the internal thread is combined with the external screw thread to be suitable for the connecting portion being screwed into second main part；Wherein, The external screw thread of the connecting portion is identical with the externally threaded hand of spiral of the cooperation screw rod, and the external screw thread of the connecting portion The first helix angle be more than it is described cooperation screw rod helix angle so that hindering the tightening piece when tightening piece pine moves back Further pine moves back.

An exemplary embodiment according to the present utility model is provided on first end surfaces of first main part At least two first engaging portions；At least two second engaging portions are provided on second end surfaces of second main part, each First engaging portion is combined with corresponding second engaging portion, is moved back with the pine for further preventing the tightening piece.

An exemplary embodiment according to the present utility model, each first engaging portion are included in a circumferential direction The the first spiral faying face and the first blocking surface of extension, each corresponding second engaging portion include extending in a circumferential direction The second spiral faying face and the second blocking surface, the first spiral faying face is configured to and the second spiral faying face matching splice grafting It touches, first blocking surface is configured to match with the second blocking surface and contact, to realize the knot of tightening piece and the annular element It closes.

An exemplary embodiment according to the present utility model, the first spiral faying face and the second spiral faying face The second identical helix angle is respectively provided with to cooperate, second helix angle is more than the externally threaded of the cooperation screw rod Helix angle, the spiralling direction of the second spiral faying face with described externally threaded to screw direction opposite.

An exemplary embodiment according to the present utility model, second helix angle are equal to the first spiral liter Angle.

An exemplary embodiment according to the present utility model, each second engaging portion further include third spiral Face, the third helicoid be by by the second spiral faying face close to the part of the second blocking surface of second engaging portion Removal is a part of and is formed, which intersects with second blocking surface.

An exemplary embodiment according to the present utility model, wherein, the annular element towards described by fastener Side be formed with ratchet, the ratchet is constructed such that in the tightening piece relative to annular described when being moved back by fastener pine Part is remained stationary as relative to by fastener.

An exemplary embodiment according to the present utility model, wherein, the fastener further includes washer, the washer Including towards the first surface by fastener, being formed with prominent tooth, the tooth and the quilt on the first surface Fastener is combined, to prevent the washer relative to by the rotation of fastener.

An exemplary embodiment according to the present utility model, wherein, the tooth is arranged radially substantially.

An exemplary embodiment according to the present utility model, wherein, the tooth is inside including the diameter from the washer Outwardly extending first part and second part are held, the second part is from the radial outer end of the first part to the pad The radially outward edge extension of circle, and the first part and the second part are at an angle.

An exemplary embodiment according to the present utility model extends to the sector shape.

An exemplary embodiment according to the present utility model, the tooth have tip, and the tip is adapted for insertion into It is described by fastener.

An exemplary embodiment according to the present utility model, wherein, the washer towards the one of the annular element Side is formed with the first recess, and first recess is suitable for accommodating at least part of the annular element, and suitable for it is described Annular element is combined, so that the annular element is remained stationary as relative to washer and by fastener when the tightening piece pine moves back.

An exemplary embodiment according to the present utility model, wherein, it is formed on the bottom surface of first recess Ratchet, the ratchet are combined with the end face of the annular element.

An exemplary embodiment according to the present utility model, wherein, the annular element further comprises：Cylindric Third engaging portion, the third engaging portion extend from second main part, and suitable for being contained in first recess.

An exemplary embodiment according to the present utility model, the outer surface of the third engaging portion and described first recessed Be formed with annular projection on one of medial surface into portion, the outer surface of the third engaging portion and first recess it is interior Annular groove is formed in the another one of side, the axial height of the annular groove is more than the axial high of the annular projection Degree, the annular element and the washer are linked together in which can be movable relatively.

An exemplary embodiment according to the present utility model, the tightening piece have four-prism shape or positive six rib Post shapes.

An exemplary embodiment according to the present utility model, second main part have opposite with the tightening piece Neat prism shape.

An exemplary embodiment according to the present utility model, the tightening piece are nut, and the nut is matched with described Close screw flight cooperation.

An exemplary embodiment according to the present utility model, the tightening piece are bolt head, the bolt head and institute It states cooperation screw rod integrally connected and rotates together.

The embodiment of one side according to the present utility model provides a kind of wrench device, for above-mentioned fastener It tightens and dismantles, the wrench device includes：Cylindric third main part；Third engaging portion is arranged in the main part Side, suitable for being matched with the lateral surface of the tightening piece and the annular element；And blocking mechanism, blocking mechanism are configured to Under blocked state, the third engaging portion and the annular element are prevented during the wrench device is inserted in the fastener Be combined and in the released state, the third engaging portion allowed to be combined at least part of the annular element.

An exemplary embodiment according to the present utility model, is formed on the third main part from the third The hole of the third engaging portion is penetrated on the outside of main part；The blocking mechanism is suitable for accommodating in the hole and reaching institute It states except hole or is removed from the hole.

An exemplary embodiment according to the present utility model, the blocking mechanism include：Screw, spiral shell peg or pin.

The fastener of the various embodiments described above according to the present utility model, by the external screw thread on the connecting portion of tightening piece with Internal thread on annular element is combined, and pass through the external screw thread on the connecting portion with it is described cooperation screw rod the hand of spiral it is identical, Externally threaded helix angle is more than the structure of the helix angle of the cooperation screw rod so that when tightening piece pine moves back, tightening piece Internal thread increases the screw fastening clamp force of tightening piece, and the further pine of tightening piece is hindered to move back, obtains stable anti-loosing effect.And It is further realized by the combination of the first engaging portion and the second engaging portion on the end face of tightening piece and the end face of annular element To the locking of the fastener.And the use of washer is reduced by the scraping damage suffered by fastener surface, is protected by fastener Surface.

Description of the drawings

The utility model with reference to the accompanying drawings to be further described, wherein：

Fig. 1 is the stereoscopic schematic diagram of the decomposition for the fastener for showing a kind of exemplary embodiment according to the present utility model；

Fig. 2 is to show another stereoscopic schematic diagram that fastener shown in FIG. 1 decomposes；

Fig. 3 is the partial schematic sectional view for showing fastener shown in FIG. 1；

Fig. 4 is the stereoscopic schematic diagram after the combination of the fastener described in Fig. 1；

Fig. 5 is the partial schematic sectional view for showing fastener shown in Fig. 4；

Fig. 6 is the stereoscopic schematic diagram for the tightening piece for showing fastener shown in FIG. 1；

Fig. 7 is the stereoscopic schematic diagram for the annular element for showing fastener shown in FIG. 1；

Fig. 8 is the stereoscopic schematic diagram for the washer for showing fastener shown in FIG. 1；

Fig. 9 is another stereoscopic schematic diagram for showing washer shown in Fig. 8；

Figure 10 is the elevational schematic view for showing the washer described in Fig. 8；

Figure 11 is to show that a kind of wrench device of exemplary embodiment according to the present utility model is nested into according to this practicality Stereoscopic schematic diagram when on a kind of fastener of novel exemplary embodiment；

Figure 12 is to show that the wrench device described in Figure 11 is nested into a kind of exemplary embodiment according to the present utility model Partial schematic sectional view when on fastener；

Figure 13 is the stereoscopic schematic diagram for showing wrench device；

Figure 14 is the schematical geometrical principle figure for the externally threaded helix angle for showing tightening piece shown in fig. 6；

Figure 15 is the externally threaded helix angle for the screw rod for showing to coordinate with the tightening piece of the embodiment of the utility model Geometrical principle figure；

Figure 16 is the schematical geometrical principle figure of the helix angle for the annular element for showing tightening piece shown in Fig. 7；And

Figure 17 is the stereoscopic schematic diagram for the fastener for showing another exemplary embodiment according to the present utility model.

Specific embodiment

Below with reference to the embodiments and with reference to the accompanying drawing the technical solutions of the present invention will be further described. In specification, the same or similar drawing reference numeral indicates the same or similar component.It is following real to the utility model with reference to attached drawing The explanation for applying mode is intended to explain the overall utility model design of the utility model, and is not construed as to this practicality A kind of novel limitation.

In addition, in the following detailed description, for ease of explaining, many concrete details are elaborated to provide to present disclosure The comprehensive understanding of embodiment.It should be apparent, however, that one or more embodiments without these specific details can also It is carried out.In other cases, well known construction and device diagrammatically embodies to simplify attached drawing.

Utility model design generally according to the present utility model provides a kind of fastener, including tightening piece and ring Shape part, the tightening piece are configured to be combined with cooperation screw rod to fasten by fastener, and the tightening piece includes the first main part The connecting portion of annular, the connecting portion is extended from first main part direction by fastener, on the lateral surface of the connecting portion It is formed with external screw thread；The annular element includes：Second main part is formed with internal thread on the second main part medial surface, institute It states internal thread and is combined with the external screw thread and be suitable for the connecting portion being screwed into second main part；Wherein, it is described The external screw thread of connecting portion is identical with the externally threaded hand of spiral of the cooperation screw rod, and externally threaded the of the connecting portion One helix angle is more than the helix angle of the cooperation screw rod so that hindered when tightening piece pine moves back the tightening piece into one Step pine moves back.

According to a utility model exemplary embodiment, the fastener of the utility model can be applied to operation In machinery, be used for example as creeper tread in engineering truck, chassis member connector.Due to the severe use work of Work machine Condition causes with larger vibration and larger load, especially transverse load in fastener in use Tightening piece can be loosened with the passage of usage time.

A kind of embodiment according to the present utility model, the tightening piece have four-prism shape, regular hexagonal prism shape or other Regular prism shape.As shown in figures 1 to 6, the tightening piece 1 is nut, the nut and the screw rod (Figure 15) thread fitting.Spiral shell Mother 1 can be the common nut such as tetragonal nut, hex nut.In another embodiment, as shown in figure 17, the tightening piece is Bolt head 1 ', the bolt head 1 ' is with coordinating 201 integrally connected of screw rod and rotating together.In this way, bolt head 1 ' and 201 structure of screw rod Into a bolt.Bolt head 1 ' can be quadrangle bolt head, hexagonal bolt head or other common bolt head shapes.

Referring to Fig. 1-15, by tightening piece for the fastener of the utility model embodiment is described for nut.

An exemplary embodiment according to the present utility model, the fastener include：It is configured to the tightening piece 1 of nut With annular element 2, the tightening piece 1 is configured to be combined to fasten by fastener (not shown), the tightening piece 1 with cooperation screw rod Including：The connecting portion 12 of first main part 11 and annular, the connecting portion 12 is from first main part 11 towards being fastened Part extends, and external screw thread 121 is formed on the lateral surface of the connecting portion 12；The annular element 2 includes：Second main part of annular 21, internal thread 211 is formed on 21 medial surface of the second main part, and the internal thread 211 is combined with the external screw thread 121 It is suitable for the connecting portion 12 being screwed into second main part 21；Wherein, the external screw thread 121 of the connecting portion 12 and institute The externally threaded hand of spiral for stating cooperation screw rod is identical, and the first helix angle of the external screw thread 121 of the connecting portion 12 is big In the helix angle of the cooperation screw rod, so that the further pine of the tightening piece 1 is hindered to move back when 1 pine of tightening piece moves back.

Figure 14 is the geometrical principle figure for the externally threaded helix angle for showing the tightening piece described in Fig. 6；Figure 15 be show with The geometrical principle figure of the externally threaded helix angle of the screw rod of the tightening piece cooperation of the embodiment of the utility model.According to this practicality A novel exemplary embodiment, the external screw thread 121 of the connecting portion are respectively formed tool with the internal thread 211 of the annular element There is the helicoid of identical lift angle to cooperate.In fig. 14, the right part of Figure 14 shows the externally threaded spiral shell of tightening piece Revolve lift angle φ.In fig.15, α is the externally threaded spiral liter of the screw rod coordinated with the tightening piece of the embodiment of the utility model Angle.Since tightening piece 1 and screw rod coordinate, the helix angle of the internal thread of tightening piece 1 is also α.

A kind of exemplary embodiment according to the present utility model, as shown in Figs. 1-5, the external screw thread 121 of the connecting portion with The internal thread 211 of second main part 21 is respectively formed with same-handed lift angle to cooperate.The external screw thread 121 of connecting portion The first helix angle φ be more than it is described cooperation screw rod helix angle α (namely helix angle of the internal thread 10 of nut), phase The internal thread 211 of cooperation, the hand of spiral of external screw thread 121 must be the same, and with coordinating the hand of spiral of screw rod and nut 1 The hand of spiral of internal thread 10 is identical.In this way, and nut 1 static relative to screw rod in annular element 2 relative to screw rod with screw rod The opposite direction of the hand of spiral in the case that pine moves back certain angle, the lateral surface of the connecting portion of nut 1 is (where external screw thread 12 Side) relative to climb altitude of the annular element 2 on axis direction (upwardly direction in Fig. 1,4) be more than nut medial surface (medial surface where the internal thread 10 of nut) relative to screw flight (upwardly direction in Fig. 1) in the axial direction pine Height is moved back, is static due to screw rod, annular element 2 and by fastener, so that 1 pair of nut is matched with what internal thread 10 was combined It closes screw rod to stretch, therefore the coupling mechanism force between the external screw thread of the internal thread 10 of nut and cooperation screw rod increases, and realizes to nut Further locking, and compress annular element 2 further towards by fastener.

Those skilled in the art twist it is also understood that corresponding to fastener and the different helix angles for coordinating screw rod The helix angle of the internal thread 211 on 121 and second main part 21 of external screw thread formed on the connecting portion of tight part also will be corresponding Adjustment.

An exemplary embodiment according to the present utility model, as shown in Fig. 1,2,4,6,7, first main part 11 The first end surfaces on be provided at least two first engaging portions；Be provided on second end surfaces of second main part 21 to Few two the second engaging portions, each first engaging portion is combined with corresponding second engaging portion, further to prevent The pine of the tightening piece 1 moves back.

An exemplary embodiment according to the present utility model, as shown in Fig. 1,2,4,6,7, each described first combines Portion includes the first spiral faying face 111 and the first blocking surface 112 that extend in a circumferential direction, each corresponding second knot Conjunction portion includes the second spiral faying face 212 and the second blocking surface 213 that extend in a circumferential direction, the first spiral faying face 111 It is configured to match with the second spiral faying face 212 and contact, first blocking surface 112 is configured to and the second blocking surface 213 match contact, to realize the combination of tightening piece 1 and the annular element 2.

An exemplary embodiment according to the present utility model, as shown in Fig. 1,2,4,6,7, first spiral combines 111 and second spiral faying face 212 of face is respectively provided with the second identical helix angle to cooperate, and second helix angle is big In the externally threaded helix angle of the cooperation screw rod, the spiralling direction of the second spiral faying face and the outer spiral shell Line to screw direction opposite.

According to the embodiment of above-mentioned example, the first spiral faying face 111 of first engaging portion and the second engaging portion The second spiral faying face 212 be respectively formed the helicoid with identical lift angle to cooperate.The helix angle β of helicoid is more than The helix angle α of the screw rod, the spiralling direction of the second spiral faying face externally threaded screw direction with described On the contrary.In this way, it is static relative to screw rod 100 in annular element 2, and nut 1 moves back the situation of predetermined angular relative to 100 pine of screw rod Under, 1 outside (from first main part 11 to the stage portion of 12 transition of connecting portion) of nut is relative to annular element 2 in axis It is opposite that climb altitude on direction (upwardly direction in Fig. 3) is more than on the inside of nut (medial surface where the internal thread 10 of nut) Height is moved back in pine of the screw flight on axis direction (upwardly direction in Fig. 3), since screw rod relative to annular element is quiet Only, so that nut 1 for matched screw rod stretch, therefore the internal thread 10 of nut with cooperation screw rod external screw thread it Between coupling mechanism force increase, the further locking to nut is realized, and annular element 2 is compressed further towards by fastener, by upper Stating the combination of the first engaging portion and the second engaging portion further realizes to the locking of the fastener.

According to the embodiment of above-mentioned example, combination and the first engaging portion by external screw thread 121 and internal thread 211 With the combination of the second engaging portion, the dual locking effect moved back for fastener is realized.

It will be understood by those skilled in the art that the second helix angle is one exemplary equal to first helix angle Mode, the second helix angle can also be larger or smaller than first helix angle, can equally play dual locking move back Effect.

An exemplary embodiment according to the present utility model, as shown in fig. 7, each second engaging portion further includes Third helicoid 214, the third helicoid 214 be by by the second spiral faying face 212 close to second engaging portion The second blocking surface 213 part removal a part and formed, which intersects with second blocking surface 213.

According to the embodiment of above-mentioned example, under tightening piece 1 and the assembled state of annular element 2, moved back in 1 non-pine of tightening piece Before, first blocking surface 112 is matched with second blocking surface 213 and is contacted.And tightening piece 1 is being screwed into annular element 2 In rundown process in, the rotation of the last lap before contacting is matched with second blocking surface 213 in the first blocking surface 112 During tight, in order to avoid the second spiral faying face 212 and the first blocking surface 112, the first spiral shell at neighbouring second blocking surface 213 Rotation 111 interference of faying face and stop the tightening piece 1 tighten in place, by the second spiral faying face 212 close to this A part removal part for second blocking surface 213 of two engaging portions, so as to reduce the height of the second blocking surface 213 so that twist First blocking surface 112 of tight part 1 can pass through and tightening piece 1 continues to be screwed down, until the first blocking surface 112 contacts Onto its corresponding second blocking surface 213.

Although it will be understood by those skilled in the art that have in above-described embodiment by being gone from the second spiral faying face 212 Except a part and formed third helicoid 214, however, the rest part of the second spiral faying face 212 still can play with First spiral faying face with reference to and effect that the nut pine is hindered to move back.During the pine of nut moves back, in the first blocking surface 112 During being moved far from the second corresponding blocking surface 213 and the second blocking surface to next second engaging portion, the Before one blocking surface 112 reaches third helicoid 214, the second spiral faying face 212 all with the first spiral faying face with reference to and hinder The nut pine is hindered to move back.

An exemplary embodiment according to the present utility model, the annular element 2 towards described by the one of fastener Side is formed with ratchet (embodiment is not shown), and the ratchet is constructed such that in the tightening piece 1 relative to by fastener The annular element 2 is remained stationary as relative to by fastener when pine moves back.

It is more than what is be subjected to when 1 pine of tightening piece moves back by the ratchet annular element 2 and by the frictional force between fastener With the frictional force between annular element 2, so that annular element 2 is relative to motionless by fastener, and 1 pine of tightening piece moves back.

An exemplary embodiment according to the present utility model, as shown in Fig. 2,9,10, fastener further includes washer 3, The washer 3 is included towards the first surface 31 by fastener, and prominent tooth is formed on the first surface 31 312, the tooth 312 is combined with described by fastener, to prevent the washer 3 relative to by the rotation of fastener.

The washer 3 is directly contacted with by fastener, and prominent tooth 312 is combined with by fastener on first surface 31, is prevented The rotation of washer 3.The embodiment of property according to the example, by setting 3 frictional engagement of washer by fastener, to tighten During threaded fastener and provide the protection by fastening workpiece surface to being in contact condition.

An exemplary embodiment according to the present utility model, as shown in Fig. 2,9,10, the tooth 312 is substantially in radiation Shape arranges.

An exemplary embodiment according to the present utility model, the tooth 312 includes as shown in Fig. 2,9,10：From described The outwardly extending first part 3121 of radial inner end of washer；And second part 3122, the second part is from described first Radially outward edge from partial radial outer end to the washer extend, and the first part with the second part into one jiao Degree.

An exemplary embodiment according to the present utility model, the tooth 312 can with arc extend.

An exemplary embodiment according to the present utility model, as shown in Fig. 2,9,10, the tooth 312 has tip, The tip is adapted for insertion into described by fastener.

When fastener is mounted preload, by pressing in axial direction of the annular element 2 to the washer 3, make The tip of the tooth is pressed by fastener, realize washer and the firm combination by fastener, prevent washer relative to By fastener rotation.

An exemplary embodiment according to the present utility model, as shown in Fig. 1,8, the washer 3 towards the ring The side of shape part 2 is formed with the first recess 33, and first recess 33 is suitable for accommodating at least one of the annular element 2 Point, and suitable for being combined with the annular element, so that the annular element 2 is relative to 3 He of washer when 1 pine of tightening piece moves back It is remained stationary as by fastener.

An exemplary embodiment according to the present utility model, as shown in Fig. 1,8, the bottom surface of first recess 33 On be formed with ratchet 331, the ratchet 331 is combined with the end face of the annular element 2.

An exemplary embodiment according to the present utility model, the ratchet 331 are configured to as shown in Figure 8 in annular element Be arranged radially on surface by the side of fastener.The ratchet of the compact arranged radial setting causes annular Larger frictional force is generated between part 2 and washer 3.During tightening piece 1 loosens, since washer 3 is relative to by fastener Remains stationary, under the action of the frictional force between the annular element 2 and washer 3, the annular element 2 is also relative to washer 3 and tight Firmware remains stationary.

An exemplary embodiment according to the present utility model, as shown in Fig. 1,8, the annular element 2 further comprises： Cylindric third engaging portion 22, the third engaging portion 22 extend from second main part 21, and described suitable for being contained in In first recess 33.

An exemplary embodiment according to the present utility model, as shown in Fig. 1,8, the appearance of the third engaging portion 22 Annular projection 332, the appearance of the third engaging portion 22 are formed on one of medial surface of face and first recess 33 Annular groove 221, the axial direction of the annular groove 221 are formed in the another one of the medial surface of face and first recess 33 Highly it is more than the axial height of the annular projection 332, the annular element 2 and the washer 3 is connected in which can be movable relatively Together.

According to the embodiment of above-mentioned example so that annular element 2 and washer 3 are inseparable and can relative rotation and axial direction Movement, so as to facilitate fastener, storage and transport.

According to the fastener of the embodiment of above-mentioned example, since after used a period of time, 1 pine of tightening piece moves back, twist The regular prism of tight part is no longer aligned with the regular prism of the annular element 2.And in the disassembly process of fastener, if using conventional Spanner only turn tightening piece 1 to dismantle, it will cause moved back on direction along 1 pine of tightening piece between tightening piece 1 and annular element 2 Further relative motion, so as to cause the coupling mechanism force of the bigger for tightening piece 1 as described above so that fastener can not Dismounting.Therefore, it is necessary to a kind of wrench devices to realize for the dismounting synchronous with annular element 2 of tightening piece 1, and due to 1 pine of tightening piece It moves back and annular element is relative to motionless by fastener, the regular prism of tightening piece is no longer aligned with the regular prism of the annular element 2 so that During wrench device is inserted in, the medial surface for the wrench device coincideing with the lateral surface of tightening piece 1 can not be nested into annular On part 2, and interference, and the second spiral faying face 212 of annular element 2 can be damaged with annular element 2.Therefore, it is necessary to one kind For the wrench device of this fastener, to realize the smooth installation and removal for fastener.

The exemplary embodiment of one side according to the present utility model as figs 11-13, provides a kind of spanner dress 4 are put, tightening and dismantling for the fastener of each exemplary embodiment of the utility model, the wrench device includes：Cylinder The third main part 41 of shape；Third engaging portion 42 is arranged on the inside of the main part, suitable for the tightening piece and the annular The lateral surface of part matches；And blocking mechanism 43, blocking mechanism 43 are configured under blocked state, in the wrench device Prevented during being inserted in the fastener wrench device be nested into the position being combined of the annular element 2 and In the released state, the third engaging portion 42 is allowed to be combined at least part of the annular element 2.

An exemplary embodiment according to the present utility model is formed on the third main part 41 from described The outside of three main parts 41 penetrates into the hole 44 of the third engaging portion 42, and the blocking mechanism 43 is suitable for being contained in the hole 44 In or remove from the hole 44.

Below in conjunction with the accompanying drawings 1-16 describe the nut fastener of embodiment according to the present utility model it is locking make it is used Journey.

When the fastener of the utility model embodiment for example is used to fasten by fastener applied to engineering truck, advance group Nut 1 and annular element 2 are closed, nut 1 is screwed into annular element 2, until the first blocking surface 112 of nut 1 is resisted against annular element The second main part 21 on the second blocking surface 213 on.Nut 1 and annular element 2, the component of washer 3 are integrally tightened onto cooperation On screw rod, apply pretightning force and fastening will be clamped by fastener.In installation process, due to the presence of washer 3, washer is for quilt The power that fastener applies is substantially vertical in by the pressure of fastener, and tighten the rotary force of nut 1 and annular element 2 rarely by It is transmitted to washer and by the contact surface between fastener, therefore reduces to by the scraping on contact surface surface.

The pine that can generate nut 1 with the passage of usage time moves back, due to the first engaging portion described above and second The interaction of engaging portion and the interaction of the internal thread of the external screw thread of tightening piece and annular element, are realized for tightening piece It is dual it is locking move back, nut is more loose to move back, being got over to the stretching of screw rod for generating due to the difference of helix angle and helix angle Greatly, so as to which coupling mechanism force is bigger, nut is caused to be less susceptible to loosen.

The operating process dismantled using wrench device 4 to fastener is detailed below：

When proceeding by dismounting, the blocking mechanism 43 of the wrench device (can be screw, bolt, sell or play similary Other components of barrier effect) it screws in/is inserted into hole 44, and be exposed to the engaging portion 42, the wrench device 4 is inserted in, So that the engaging portion 42 of wrench device 4 is combined with the lateral surface of the nut 1 of regular prism shape, wrench device 4 is towards fastener Movement, until the upper end that the blocking mechanism 43 is tightened part 1 is stopped, rotary spanner device 4 is with by the loose nut 1 moved back at this time Playback, until the first blocking surface 112 contacts the second blocking surface 213.Later, blocking mechanism 43 is screwed out/extracted, by wrench device 4 continue to be inserted in downwards, until the engaging portion of wrench device 4 42 is attached to the lateral surface of the tightening piece and the annular element, this When can rotary spanner device 4, realize for tightening piece 1 it is synchronous with annular element 2 dismounting.

Figure 17 is the schematic diagram for the fastener for showing another exemplary embodiment according to the present utility model.Shown in Figure 17 Fastener and Fig. 1-6 shown in fastener the difference lies in the fastener shown in Figure 17, tightening piece is and screw rod 201 integrally connecteds and the bolt head 1 ' rotated together with screw rod 201.

Referring to Figure 17, fastener includes bolt and annular element 2 ' and washer 3 ', and bolt includes integrally connected and turns together Dynamic bolt head 1 ' and the screw rod 201 with threaded portion.The at one end being combined with bolt head 1 ' of screw rod is provided with external screw thread, It is matched with the internal thread with annular element 2 '.

In the fastener, the combination of the internal thread of the structure of annular element, the external screw thread of shank of bolt and annular element with The structure in nut fastener shown in Fig. 1-11 is identical with combination, and details are not described herein.

The above wrench device is equally applicable to the installation and removal of the fastener, for the peace of the fastener The installation of the fastener of dress, disassembly process with including nut, disassembly process are similar, and details are not described herein.

The fastener of the various embodiments described above according to the present utility model, by the external screw thread on the connecting portion of tightening piece with Internal thread on annular element is combined, and pass through the external screw thread on the connecting portion with it is described cooperation screw rod the hand of spiral it is identical, Externally threaded helix angle on connecting portion is more than the structure of the helix angle of the cooperation screw rod so that when tightening piece pine moves back When, the screw fastening clamp force that tightening piece applies is increased by the internal thread of tightening piece, the further pine of tightening piece is hindered to move back, is obtained Stable anti-loosing effect.And pass through the knot of the first engaging portion on the end face of tightening piece and the end face of annular element and the second engaging portion Conjunction is further realized to the locking of the fastener.And washer use reduce by fastener surface fastener dismounting Suffered damage in the process, is protected by fastener surface.

It will be understood to those skilled in the art that embodiment described above is all exemplary, and this field Technical staff can make improvements, the rushing in terms of not recurring structure or principle of the structure described in various embodiments It can be freely combined in the case of prominent.

After the preferred embodiment of the utility model is described in detail, those skilled in the art can be clear Solution, in the protection domain for not departing from appended claims with that can carry out various change under spirit with changing, and the utility model is also It is not only restricted to the embodiment of examples cited embodiment in specification.

Claims

1. a kind of fastener, which is characterized in that including：

Tightening piece (1) is configured to be combined to fasten by fastener with cooperation screw rod, and the tightening piece (1) includes：

First main part (11) and

The connecting portion (12) of annular, the connecting portion (12) is extended from first main part (11) direction by fastener, described External screw thread (121) is formed on the lateral surface of connecting portion (12)；And

Annular element (2), the annular element (2) include：

Second main part (21) is formed with internal thread (211), the internal thread on the second main part (21) medial surface (211) it is combined with the external screw thread (121) and is suitable for the connecting portion (12) being screwed into second main part (21)；

Wherein, the external screw thread (121) of the connecting portion (12) is identical with the externally threaded hand of spiral of the cooperation screw rod, and First helix angle of the external screw thread (121) of the connecting portion (12) is more than the helix angle of the cooperation screw rod, so that working as Tightening piece (1) pine hinders the further pine of the tightening piece (1) to move back when moving back.

2. fastener according to claim 1, which is characterized in that wherein,

At least two first engaging portions are provided on first end surfaces of first main part (11)；

At least two second engaging portions are provided on second end surfaces of second main part (21), each described first combines Portion is combined with corresponding second engaging portion, is moved back with the pine for further preventing the tightening piece (1).

3. fastener according to claim 2, which is characterized in that wherein,

Each first engaging portion includes the first spiral faying face (111) and the first blocking surface that extend in a circumferential direction (112), each corresponding second engaging portion includes the second spiral faying face (212) and second extended in a circumferential direction Blocking surface (213), the first spiral faying face (111) are configured to match with the second spiral faying face (212) and contact, and described One blocking surface (112) is configured to match with the second blocking surface (213) and contact, to realize tightening piece (1) and the annular element (2) combination.

4. fastener according to claim 3, which is characterized in that wherein,

The first spiral faying face (111) and the second spiral faying face (212) are respectively provided with the second identical helix angle with phase Mutually cooperation, second helix angle are more than the externally threaded helix angle of the cooperation screw rod, the second spiral faying face Spiralling direction with described externally threaded to screw direction opposite.

5. fastener according to claim 4, which is characterized in that wherein,

Second helix angle is equal to first helix angle.

6. fastener according to claim 4, which is characterized in that wherein, each second engaging portion further includes：

Third helicoid (214), the third helicoid (214) are by the way that the close of the second spiral faying face (212) is somebody's turn to do The part removal of the second blocking surface (213) of second engaging portion is a part of and is formed, the third helicoid (214) and described second Blocking surface (213) is intersecting.

7. fastener according to claim 1, which is characterized in that wherein, the annular element (2) is fastened towards described The side of part is formed with ratchet, and the ratchet is constructed such that move back when institute relative to by fastener pine in the tightening piece (1) Annular element (2) is stated to remain stationary as relative to by fastener.

8. fastener according to claim 1, which is characterized in that wherein, the fastener further includes：

Washer (3), the washer (3) include：

Towards the first surface (31) by fastener, prominent tooth (312), institute are formed on the first surface (31) It states tooth (312) to be combined by fastener with described, to prevent the washer (3) relative to by the rotation of fastener.

9. fastener according to claim 8, which is characterized in that wherein, the tooth (312) is arranged radially substantially.

10. fastener according to claim 8, which is characterized in that wherein,

The tooth (312) includes：

From the outwardly extending first part of the radial inner end of the washer (3121)；And

Second part (3122), radially outward edge of the second part from the radial outer end of the first part to the washer Extension, and the first part and the second part are at an angle.

11. fastener according to claim 8, which is characterized in that wherein, extend to tooth (312) arc.

12. fastener according to claim 8, which is characterized in that wherein, the tooth (312) has tip, the tip It is adapted for insertion into described by fastener.

13. fastener according to claim 8, which is characterized in that wherein, the washer (3) towards the annular element (2) side is formed with the first recess (33), and first recess (33) is suitable at least the one of the receiving annular element (2) Part, and suitable for being combined with the annular element so that when the tightening piece (1) pine moves back the annular element (2) relative to It washer (3) and is remained stationary as by fastener.

14. fastener according to claim 13, which is characterized in that wherein, on the bottom surface of first recess (33) Ratchet (331) is formed with, the ratchet (331) is combined with the end face of the annular element (2).

15. fastener according to claim 13, which is characterized in that wherein, the annular element (2) further comprises：

Cylindric third engaging portion (22), the third engaging portion (22) extends from second main part (21), and is suitable for It is contained in first recess (33).

16. fastener according to claim 15, which is characterized in that wherein, the outer surface of the third engaging portion (22) Be formed with annular projection (332) on one of the medial surface of first recess (33), the third engaging portion (22) Annular groove (221), the annular groove are formed in the another one of the medial surface of outer surface and first recess (33) (221) axial height is more than the axial height of the annular projection (332), by the annular element (2) and the washer (3) It links together with can be movable relatively.

17. fastener according to claim 1, which is characterized in that wherein, the tightening piece (1) has four-prism shape Shape or regular hexagonal prism shape.

18. fastener according to claim 17, which is characterized in that wherein, second main part has twists with described The prism shape that tight part (1) aligns.

19. according to claim 1-18 any one of them fasteners, which is characterized in that wherein, the tightening piece (1) is spiral shell Mother, the nut and the cooperation screw flight cooperation.

20. according to the fastener described in any one of claim 1-18, which is characterized in that wherein, the tightening piece (1) is Bolt head, the bolt head screw rod integrally connected and rotate together with the cooperation.

21. a kind of wrench device is exclusively used in tightening and dismantling for the fastener described in any one of claim 1-20, special Sign is that the wrench device includes：

Cylindric third main part (41)；

Third engaging portion (42) is arranged on the inside of the main part, suitable for the lateral surface with the tightening piece and the annular element It matches；And

Blocking mechanism (43), blocking mechanism (43) are configured under blocked state, and the fastening is inserted in the wrench device The third engaging portion (42) being combined and in the released state with the annular element (2) is prevented during part, is allowed The third engaging portion (42) is combined at least part of the annular element (2).

22. wrench device according to claim 21, which is characterized in that wherein,

It is formed on the third main part (41) on the outside of the third main part (41) and penetrates into the third combination The hole (44) in portion (42)；

The blocking mechanism (43) is suitable for being contained in the hole (44) and reach except the hole or from the hole (44) It removes.

23. wrench device according to claim 22, which is characterized in that wherein,

The blocking mechanism includes：Screw, spiral shell peg or pin.