CN2752515Y

CN2752515Y - Locking and antitheft device for nut and special spanner thereof

Info

Publication number: CN2752515Y
Application number: CN 200420108897
Authority: CN
Inventors: 俞苗根
Original assignee: Jiangsu Power Transmission & Transformation Corp
Current assignee: Jiangsu Power Transmission & Transformation Corp
Priority date: 2004-11-18
Filing date: 2004-11-18
Publication date: 2006-01-18
Anticipated expiration: 2014-11-18

Abstract

The utility model relates to a looseness and theft preventing device for nuts and a spanner thereof. The looseness and theft preventing device is composed of a spiral shim and a spiral wedge which are matched, wherein the spiral shim has more than one circle of inner threads, a first buckle spiral tooth of the inner threads is provided with a bevel edge, the spiral wedge is made of elastic wires, and the length of the screw of the spiral wedge is bigger than a half circle and is smaller than one circle. The outer side of one end of the spiral wedge is provided with a wedge surface corresponding to the bevel edge of the first buckle spiral tooth of the spiral shim. The special spanner is composed of a handle, a core body and a guide sleeve, wherein the inner wall of the core body is provided with threads which are identical to threads of a bolt, one end of the core body is fixedly connected with the handle, a first tooth end part of inner threads of the other end of the core body is provided with a convex working head, and the guide sleeve is glidingly matched with the core body. Original nuts do not need disassembling, and the utility model has convenient installation.

Description

Locking anti-theft nut unit and special spanner thereof

Technical field

The utility model relates to a kind of nut anti-looseness and anti-theft device, particularly a kind of locking anti-theft nut unit and special spanner thereof that is used to move member nut locking radial.Belong to field of mechanical technique.

Background technique

At present, be used for nut anti-looseness, antitheft device has numerous species.Axial clearance during double nut, spring washer etc. are eliminated screw rod and nut is cooperated by end-face friction can only play locking effect, and is not ideal to the occasion effect that installation requirement is high, and increase material and cost.Patent documentation is reported many nut anti-looseness, anti-theft device in recent years, be broadly divided into three classes by its structure characteristic, one class is to put into butterfly spring, nut tip portion at the internally tangent ring-shaped groove of nut to fix a special spring sheet and embed screw rod, or the axial clearance between plain nut and screw rod is carried out nut anti-looseness.One class is groove of gradually deepening along the screw thread tightening direction of processing on the internal thread of common standard nut, puts into a ball then or squeeze into a key pin at groove in groove, in order to pin nut.The 3rd class is to adopt special periphery to be the nut or the special-shaped nut structure of convex-shaped surface, or adopts the tenon structure, all packs screw rod into to reach the antitheft purpose of nut with special tool.More than the device great majority all will be changed a social system again to standard nut, have weakened the mechanical strength of nut, the locking device structure complexity of increase, and the big cost height of volume, and generally can not have locking and antitheft function simultaneously concurrently.More than device is used for the nut of newly-built member, can play certain locking, antitheft effect, but be applied on the nut that moves member, and difficulty is but very big.For example for the iron tower of power transmission line that has moved in a large number, at first must remove original bolt, nut on these iron towers, and these bolts, nut are subjected to the effect of wind-force in the open air throughout the year, produce the low-frequency vibration of self, make the whole asphyxias by external pressure on the chest and abdomen in gap on bolt and the iron tower member, dismounting difficulty and workload are huge.Even original bolt is all removed, the special-shaped anti-theft bolt that wants to pack into from component hole again neither a lead-pipe cinch.Original bolt under being disassembled, nut are because of defectives such as distortion, corrosions, and great majority can not be reused, and all purchase new special-shaped anti-theft bolt, nut, and cost is higher, therefore consider it also is non-remunerative from economic angle.

Summary of the invention

The purpose of this utility model is, overcomes the deficiencies in the prior art part, provide a kind of simple in structure, must not dismantle original bolt, nut and can effectively locking, antitheft locking anti-theft nut unit.

Another purpose of the present utility model is, for locking anti-theft nut unit provides a kind of assembling special spanner.

The utility model is to take following technological scheme to realize:

Locking anti-theft nut unit of the present utility model, comprise nuts and bolt, it is characterized in that it also comprises spiral shell pad and spiral wedge, the common supporting composition locking anti-theft nut unit of nut, bolt, spiral shell pad and spiral wedge, described spiral shell pad has the internal thread greater than a week, and its internal thread first button thread has chamfering, and the spiral wedge is made up of elastic metallic yarn, its helix length is greater than half cycle and less than a week, and the end outside is to buckle the corresponding wedge surface of chamfering with spiral shell pad first.

Aforesaid locking anti-theft nut unit is characterized in that the wherein said spiral shell pad outside is for cylindrical.

Aforesaid locking anti-theft nut unit, it is corresponding trapezoidal to it is characterized in that wherein said spiral wedge cross section is bolt thread gap.

A kind of special spanner of locking anti-theft nut unit, it is made up of handle and guide pin bushing, it is characterized in that it also comprises core body, described core body inwall has and the corresponding to screw thread of bolt thread, core body one end is fixedlyed connected with handle, the other end internal thread first tooth end is the working head of projection, and guide pin bushing is enclosed within on the core body, is slidingly matched with core body.

The special spanner of aforesaid locking anti-theft nut unit is characterized in that being equipped with the guide pin bushing Returnning spring between wherein said guide pin bushing and the core body, and the guide pin bushing side has axial slide, and adjusting screw places in the chute, fixedlys connected with core body.

The utility model locking anti-theft nut unit working principle process is, by the supporting locking anti-theft nut unit of forming of nut, bolt, spiral shell pad and spiral wedge, the spiral shell pad has and the corresponding to internal thread greater than a week of bolt thread, its internal thread first button thread has chamfering, the spiral wedge is made by elastic metallic yarn, identical its helix length of pitch of its pitch and spiral shell pad is greater than half cycle and less than a week, and the end outside is to buckle the corresponding wedge surface of chamfering with spiral shell pad first.The said apparatus using method is, the part of appearing that is rotary with the bolt of nut at operation iron tower or member screws in the spiral shell pad earlier with hand, make its end that interior chamfering is arranged outwardly, with special spanner the spiral wedge is packed among the interior Hole chamfering of spiral shell pad then, till tightening.At this moment, the top that spiral shell pad first is buckled non-complete thread is pressed on the wedge surface of spiral wedge, because this spiral wedge leans on resilient grip in the bolt spiral chute, in case the nut of spiral shell pad and front thereof is because of being vibrated or the varying load desire is loosening when returning, the spiral wedge can not retreat thereupon, and therefore, the spiral wedge is when eliminating spiral shell pad, bolt radial clearance, also eliminate its axial clearance, reached the purpose of spiral shell pad and front nut anti-looseness thereof.Because in this spiral wedge when assembling, is almost all in the stud bolt spiral chutes, so good concealment, is difficult for realizing, realized exactly, if when wanting to back out the spiral shell pad and back out nut, also be impossible at all with instruments such as common planks.On the contrary, because the effect of wedge only can be moved back tighter and tighter, thereby realize the antitheft purpose of nut.

Description of drawings

Fig. 1 is the utility model device user mode schematic representation.

Fig. 2 is the spiral wedge plan view of the utility model device.

Fig. 3 is that the A of Fig. 2 is to schematic representation.

Fig. 4 is the B----B sectional view of Fig. 2.

Fig. 5 is the utility model device assembling special spanner profile schematic representation.

Fig. 6 is the D----D sectional view of Fig. 5.

Fig. 7 is the C portion enlarged diagram of Fig. 5.

Embodiment

As shown in Figure 1, on the bolt 1 of operation member 2, be fixed with nut 3, the spiral shell pad 5 of the utility model device is screwed in and is tightened by bolt 1 part of appearing, the end that the spiral shell pad has an interior Hole chamfering outwardly, the spiral wedge 4 that will install with special spanner is packed among the interior Hole chamfering of spiral shell pad 5 then.The spiral shell pad has 1---3 week internal thread among the embodiment, and the M16 gauge thickness is 5mm only, and the M20 gauge thickness is 6mm only.The spiral shell pad outside can be the hexagonal cylindricality, for more effectively antitheft, is preferably cylindrical.This device volume is little; consumptive material is few; can form standard, tandem product; simple installation can effectively prevent nut loosening and stolen, needn't dismantle the nuts and bolt that has moved large in number and widely distributed; member nut for new installation can shield equally; can also be from one or both ends locking nut and analog thereof, applied widely, save cost.Concordant substantially with bolt as nut in the practice, the bolt less individual cases of appearing can be backed out former nut, change the thin slightly hexagon thin nut of thickness, and the utility model device is installed again.As the member that this device is housed can adopt the high pulling torque spanner need remove the time, and this device spiral shell pad thread is destroyed, and pulls down, and rejects the spiral wedge, and then with regard to detachable original bolt, nut.

As shown in Figures 2 and 3, the spiral wedge of the utility model device 4 is made by elastic metallic yarn, and its pitch is identical with the pitch of spiral shell pad, and its helix length is greater than half cycle and less than 1 week, and the end outside is to buckle the corresponding wedge surface 6 of chamfering with spiral shell pad first.For making the spiral wedge can fully fill up the gap of spiral shell pad and bolt thread, make locking, anti-theft effect is better, the further feature of the utility model is that as shown in Figure 4, it is corresponding trapezoidal with bolt thread gap that spiral wedge cross section is.

For the assembling of the utility model device, if use instruments such as having spanner now, be difficult to finish, waste time and energy a kind of assembling special spanner of ad hoc for this reason meter.As Fig. 5, Fig. 6 and shown in Figure 7, this special spanner is made up of handle 7, core body 9 and guide pin bushing 10, core body 9 inwalls have and the corresponding to screw thread 13 of bolt thread, core body one end is fixedlyed connected with handle 7, the other end internal thread first tooth end is the working head 11 of projection, and the outside has and working head all-in-one-piece projection 12, to strengthen the intensity of working head, guide pin bushing 10 is enclosed within on the core body, is slidingly matched with core body.In order not influence being slidingly matched of guide pin bushing and core body, the jagged groove 14 in corresponding core body working head projection place, guide pin bushing end.During use, the guide pin bushing initial position covers the bolt exposed parts in preceding (as shown in Figure 6) with the core body port, rotatable handle, core body is precession on bolt, and the working head on the core body is pushing away spiral wedge afterbody makes it screw in the spiral shell pad, and the effect of guide pin bushing is to prevent that the spiral wedge is by the disengagement of jumping on the bolt.After the core body working head screwed in the spiral shell pad with the spiral wedge, the guide pin bushing front end was just kept off back by spiral shell pad end face.With after also the guide pin bushing position must be adjusted to original state above core body.For making things convenient for the adjusting of guide pin bushing position, further feature is, as shown in Figure 5 and Figure 6, between guide pin bushing and core body, be equipped with guide pin bushing Returnning spring 8, the guide pin bushing side has axial slide 16, and adjusting screw 15 places in the chute, fixedlys connected with core body, by the elastic force of screw 15 Regulation springs, make guide pin bushing reset to corresponding initial position.This special spanner can design multiple ten minutes specification, is used for the bolt of different size, and is easy to use, laborsaving, quick, guaranteed the work efficiency of assembling the utility model device.

In addition to the implementation, all employings are equal to the technological scheme that form obtained of replacement or equivalent transformation, all drop within the protection domain of the present utility model.

Claims

1, locking anti-theft nut unit, comprise nuts and bolt, it is characterized in that it also comprises spiral shell pad and spiral wedge, the common supporting composition locking anti-theft nut unit of nut, bolt, spiral shell pad and spiral wedge, described spiral shell pad has the internal thread greater than a week, and its internal thread first button thread has chamfering, and the spiral wedge is made up of elastic metallic yarn, its helix length is greater than half cycle and less than a week, and the end outside is to buckle the corresponding wedge surface of chamfering with spiral shell pad first.

2, locking anti-theft nut unit according to claim 1 is characterized in that the wherein said spiral shell pad outside is for cylindrical.

3, locking anti-theft nut unit according to claim 1, it is corresponding trapezoidal to it is characterized in that wherein said spiral wedge cross section is bolt thread gap.

4, the special spanner that is used for the described locking anti-theft nut unit of claim 1, it is made up of handle and guide pin bushing, it is characterized in that it also comprises core body, described core body inwall has and the corresponding to screw thread of bolt thread, core body one end is fixedlyed connected with handle, the other end internal thread first tooth end is the working head of projection, and guide pin bushing is enclosed within on the core body, is slidingly matched with core body.

5, special spanner according to claim 4 is characterized in that being equipped with the guide pin bushing Returnning spring between wherein said guide pin bushing and the core body, and the guide pin bushing side has axial slide, and adjusting screw places in the chute, fixedlys connected with core body.