CN2273238Y

CN2273238Y - Protecting device for open wrench screw nut or bolt

Info

Publication number: CN2273238Y
Application number: CN 96230750
Authority: CN
Inventors: 吴传福
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-09-23
Filing date: 1996-09-23
Publication date: 1998-01-28
Anticipated expiration: 2006-09-23

Abstract

The utility model relates to a protecting device for the screw cap or screw bolt of an open wrench, belonging to a wrench. The utility model has a structure that the clamping jaw of the wrench, in which the four sides of the screw cap or the screw bolt can be contained and clamped, is made to an open honeycomb socket shape. The three socket angles of the clamping jaw and parallel clamping surfaces on both sides of the clamping jaw are respectively provided with arc-shaped concave holes. The positions of the arc-shaped concave holes just conform to the relational form of five contacting rim angles clamped by the wrench of the screw cap or the screw bolt. When the screw cap or the screw bolt is locked and disassembled, the contact point between the screw cap and the wrench or the contact point between the screw bolt and the wrench is transferred to the side plane of the screw cap or the screw bolt. Therefore, the problems that the rim angles of the screw cap or the screw bolt are worn, and the locking and the disassembly of the screw cap or the screw bolt are disengaged do not occur.

Description

The protective device of open-end wrench nut or bolt

The utility model relates to uses spanner, the protective device of particularly a kind of open-end wrench nut or bolt.

Generally the lock to hexagonal (hexagon)nut or bolt unloads operation, nothing more than being with open-end wrench, execution of instrument such as box spanner or monkey wrench, wherein this box spanner is because of factors such as specification and structure kenels, cause it to use bigger spatial constraints is arranged, though and monkey wrench has the convenience of adjusting the clamping specification according to nut or bolt size, but adjust threaded shank because of comparatively propping up it with thumb when trouble and the application of force on adjusting, add its volume restrictions, cause it to use and still have many restrictions and impracticable part, be and open-end wrench is to obtain the consumer with its light volume and easy operation extensively to adopt, especially because of the roughly existing unified trend of the specification of nut or bolt, open-end wrench has the unfavorable factor of specification limits though be, but generally speaking, its practicality and not second to monkey wrench.

The open-end wrench of now knowing, see also shown in Figure 4, its main body is that two ends have the wrench body 10 than enlarged head 11, respectively be formed with the open type folder mouth 12 of tool parallel surface in its two ends head 11, folder mouthful 12 both sides are respectively in order to clamping nut or bolt and as two

jaws

13,14 of the application of force, this two

jaw

13,14 of mat is parallel clamping face to be fixed plane, the both sides formation clamping of nut or bolt, utilize the strength of switching wrench body 10 according to this and control two

jaws

13,14 to drive nuts or bolt rotation, and then unload operation according to the lock that its direction of rotation reaches nut or bolt.

Only, the lock that carries out nut or bolt with open-end wrench unloads operation, can form two sides clamping rotation to nut or bolt by two jaws though be known as, but in fact, because of taking the smoothness that nut or bolt were inserted in or derived key grip into account, the general chi footpath that all specification of key grip is slightly larger than the nut of desire operation, cause between nut or bolt and spanner two jaw clamping faces and have the gap, under this situation, when unloading operation, the lock that carries out nut or bolt will produce state as shown in Figure 5, because of this nut or bolt 20 and two jaws 13, the gapped existence of 14 clamping face, be and when switching wrench body 10, its two

jaw

13,14 can't drive nut or bolt 20 rotations at once, but at two

jaws

13,14 rotate suitable angle a little after, make nut or bolt 20 reach two corners 21 of leaning on second jaw, 14 outer ends by first jaw, 13 inner ends, 22 form point-like with two clamping faces contacts, could unload with the lock of wrench body 10 operation nuts or bolt 20, this one concerns that kenel not only easily causes the stress concentration phenomenon of this contact site application of force, and through being easy to cause the wearing and tearing of this position structure after repeatedly lock unloads, make it that slip phenomenon very easily take place when lock unloads, have a strong impact on its lock and unload the stable and smooth and easy of operation, remain to be solved improvement in fact.

In addition, for solving the restricted problem of open-end wrench on operations specifications, be to have the dealer to develop the nut of applicable two kinds of specifications or the open-end wrench that the bolt lock unloads, there is Improvement type spanner shown in Figure 6 to come out before this type of design, on its structural design, mainly be in spanner 30 2 jaws 31, the appropriate position of 32 clamping faces is provided with two jiaos of holes 33,34, these two jiaos of holes 33,34 relative distance is to be slightly larger than than the nut of the little size of spanner or the width across corners of bolt, be slightly larger than than the nut of the little size of spanner or the breach 35 of bolt single face width and be provided with a width in spanner 30 a folders mouthful bottom, use except being applicable to that the nut that conforms to spanner 30 folder mouthful specifications or the lock of bolt unload the operation, more can these two jiaos of holes 33,34 and the cooperation of breach 35 and can unload operation at the nut of reduced size or the lock of bolt, and with the stable holding of formation multiaspect.

Yet, with the structural design of this Improvement type open-end wrench, in fact and fail certain improvement and now know the disappearance of structure, even have its difficulty to exist on the implementation, only explanation as back slightly:

(1). see also shown in Figure 7, unload in the operation when carry out nut or bolt lock that specification with it conforms to these spanners, because of the facility of considering that nut or bolt are inserted in and derive, still possess the gap between its nut or bolt and folder mouth, be and its lock concerns that kenel is still two corners 41,42 with nut or bolt 40 and forms two point form with two jaws, 31,32 clamping faces of spanner 30 and contact when unloading to cause its corner 41,42 structure wear problems and fail to obtain effective solution.

(2). see also shown in Figure 8, when the lock that carries out the reduced size nut with this spanner unloads operation, be two jiaos of holes 33 that utilize spanner 30,34 and 35 pairs of nuts of breach or bolt 50 form the multiaspect clampings, be to be nut or bolt 50 relative corners 51 only because of its structural relation kenel, 52 just are placed in two jiaos of holes 33, in 34, that is the diagonal distance of this nut or bolt 50 must be greater than spanner 30 folder mouthful width, cause nut or bolt 50 to be inserted in from the openend of spanner 30 folder mouths, and spanner 30 must be inserted in from the top of nut or bolt 50, therefore just cause it to use the restriction of pattern, even the problem that in some particular space, can't implement, have a strong impact on its practicality, simultaneously because of this conformal aperture 33,34 the degree of depth is also little, cause itself and nut or bolt 50 corners 51,52 contact site is also little, stress effect when adding the application of force causes the phenomenon that the angle is collapsed in its structure wearing and tearing to produce with easier.

Sum up the above, the structural design of this Improvement type open-end wrench, obviously and fail to solve the disappearance of now knowing open-end wrench, the real still difficult perfect design that is called.

And for providing hexagonal (hexagon)nut or bolt when lock unloads, can obtain the stable holding of open-end wrench two clamping faces, it is the steadiness that has the dealer to attempt to promote its clamping in the mode that adds profile of tooth grip rib line at the spanner clamping face, so in fact, the corner two point-contact type attitudes of the setting of these grip rib lines when release lock does not unload yet, not only fail to obtain firm lock and unload operation, because of the rib line its wear phenomenon is quickened in the friction of corner on the contrary, and it very easily forms sharp keen burr to nut or bolt friction cuttings in the surface, be easy to injure human body accidentally when touching, real difficulty is called good improvement design.

In view of this, the purpose of this utility model is to design the protective device of a kind of open-end wrench nut or bolt; At first make the nut of the corresponding clamping of this key grip or the appropriate position that respectively contacts the corner of bolt be respectively equipped with arc recess, use when the lock of operation nut or bolt unloads, be able to the contact corner of ccontaining nut of these arc recesses or bolt, make its spin contact be transferred to the side plane of nut or bolt, and then reach the purpose that prevents nut or the wearing and tearing of bolt corner;

Secondly; the setting that makes these arc recesses is all contact corners of including interior nut of spanner clamping range or bolt; therefore no matter carry out with spanner that clockwise lock establishes that operation or counterclockwise pine are unloaded operation or with the spanner use that is inverted; though it still is the spin contact of point-like, its corner all can obtain the ccontaining protection of arc recess.

The 3rd ties up to and all makes suitable radian lead angle in: the interface place of this each arc recess and clamping face and modify, and uses the stress effect that alleviates this position, provide protection against wear the surface of cutting nut or bolt simultaneously.

For achieving the above object, the utility model is achieved in that

The utility model is the protective device of a kind of open-end wrench nut or bolt, comprises spanner, Jia Kou; Be respectively equipped with arc recess at the nut of folder mouthful corresponding clamping or the appropriate position that respectively contacts the corner of bolt.And the folder mouth of spanner is that do can ccontaining clamping nut or the open honeycomb cave type design of four sides of bolt, and angle, three caves and two the parallel clamping face of side appropriate locations in this folder mouthful respectively are provided with a plurality of arc recesses, and the position of these arc recesses just meets nut or bolt by the kenels that concern of five contact corners of spanner clamping.All do suitable radian lead angle modification at each arc recess of folder mouth and the interface place of clamping face.

The utility model compared with the prior art, its advantage:

(1). it is ccontaining for the corner of nut or bolt that the default arc recess of mouth is pressed from both sides in utilization, and the application of force contact point of nut or bolt and spanner is transferred to the side plane of nut or bolt, and then can prevent that nut or bolt corner from wearing and tearing and the phenomenon of unloading slippage is locked in generation.

(2). the setting of these arc recesses is all contact corners of including interior nut of spanner clamping range or bolt; therefore no matter carry out with spanner that clockwise lock establishes that operation or counterclockwise pine are unloaded operation or with the spanner use that is inverted; though it still is the spin contact of point-like, its corner all can obtain the ccontaining protection of arc recess.

(3). the interface place of each arc recess of this spanner and clamping face all makes suitable radian lead angle and modifies, use the stress effect that alleviates this position, provide protection against wear the surface of cutting nut or bolt simultaneously, avoid nut or bolt surface to produce sharp keen burr and injure human body accidentally.

(4). via the kenel design of folder mouth; make it know that more now structure contacts kenel and increased the contact point of folder mouthful bottom and constituted the bikini contact with the two point form spin of nut or bolt; and then outside the corner structure defencive function of nut or bolt, further improve the steadiness of its clamping application of force.

From the above; the utility model is by the improvement design of structure; made it to break away from and known that now spanner unloads operational two point form corner contact kenel at the lock of nut or bolt; and then can form the structural defence device with the set arc recess of its folder mouthful corresponding nut or bolt contact corner; thoroughly solve that its lock unloads the corner structure wearing and tearing that action may cause and the lock of deriving unloads problems such as slippage; as a whole; the utility function of reaching by its structural design; really can provide the intermediate value of utilizing on the industry, not less than being an excellence, outstanding innovative design.

The utility model can also obtain further instruction from the following drawings and embodiment:

Fig. 1 is the utility model open-end wrench structural upright schematic diagram.

Fig. 2 is the structural relation schematic diagram of the utility model open-end wrench when carrying out nut or bolt lock.

Fig. 3 is that the utility model open-end wrench carries out nut or the bolt structural relation schematic diagram when unloading.

Fig. 4 is a structural upright schematic diagram of now knowing open-end wrench.

Fig. 5 knows that now open-end wrench carries out nut or bolt is locked the structural relation schematic diagram that unloads when operating.

Fig. 6 is the structural upright schematic diagram of Improvement type open-end wrench.

Fig. 7 is the Improvement type open-end wrench structural relation schematic diagram of specification nut or bolt lock when unloading operation that conform to.

Fig. 8 is the structural relation schematic diagram of Improvement type open-end wrench when carrying out unloading operation than small dimension nut or bolt lock.

The drawing explanation:

10-wrench body, 11-head, 12,61-folder mouth, 13,14,31,32-jaw, 20,40,50,70-nut or bolt, 21,22,41,42,51,52,72,73,74,75,76-corner, 30,60-spanner, 33, hole, 34-angle, 35-breach, 62,63,64,65,66-arc recess.

Below by accompanying drawing embodiment of the present utility model is described in detail:

See also shown in Figure 1; the utility model is made open-end wrench 60 folder mouths 61 design of corresponding bolt or nut kenel on structure; system will press from both sides mouthfuls 61, and do can ccontaining clamping nut or the open honeycomb cave kenel of four sides of bolt; angle, three caves and both sides parallel clamping face appropriate location in folder mouth 61 respectively is preset with 5 arc recesses 62; 63; 64; 65; five contact corners when 66 position just meets nut or bolt by spanner 60 clampings concern kenels; using the lock that no matter carries out nut or bolt unloads when operating; the contact corner of this nut or bolt all can correspondence be placed in arc recess 62; 63; 64; 65; in 66; make the contact point of nut or bolt and spanner 60 be transferred to the side plane of nut or bolt; using its application of force switching spanner locks and unloads when operation and cause locking the problem of unloading slippage with not causing wearing and tearing to the corner structure of nut or bolt; and each arc recess 62; 63; 64; 65; 66 all make suitable radian lead angle with the interface place of each clamping face modifies; use the stress effect that alleviates this position; provide protection against wear the surface of cutting nut or bolt simultaneously, become a kind of spy in view of the above and have protection nut or bolt effect open-end wrench.

The inferior Fig. 2 that sees also; shown in 3; arc recess 62 because of its spanner 60 folder mouths 61; 63; 64; 65; 66 respectively contact corner 72 in being provided with when system is subjected to clamping according to bolt or nut 70; 73; 74; 75; 76 design with the relativeness of folder mouthful 61 each clamping face; be and each corner 72 of its nut or bolt 70; 73; 74; 75; 76 all have its corresponding arc recessed 62; 63; 64; 65; 66; so no matter be to carry out clockwise lock with spanner 60 to establish operation (as shown in Figure 2); or counterclockwise pine is unloaded operation (as shown in Figure 3); or with the spanner use that is inverted; though it still is the spin contact of point-like; but its corner 73; 74; 76 or 75; 74; 72 all can obtain arc recess 63; 64; 66 or 65; 64; 62 ccontaining protection; reach except that its contact point being transferred to nut or bolt 70 side planes the effect of prevention corner wearing and tearing; more the kenel design because of folder mouth 61 forms the bikini contact; making it will be more firm on the clamping application of force, become an innovation open-end wrench that has the protection of nut or bolt arrangement and practical intermediate value concurrently according to this.

Claims

1. the protective device of open-end wrench nut or bolt comprises spanner (60), folder mouthful (61), it is characterized in that: the position in that the nut or the bolt of the corresponding clamping of Jia Kou (61) respectively contacts the corner is arranged with arc recess.

2. the protective device of open-end wrench nut according to claim 1 or bolt; it is characterized in that: four sides at Jia Kou (61) are open honeycomb cave type; and angle, three caves and two parallel clamping face positions in this folder mouthful (61) are provided with a plurality of arc recesses (62,63,64,65,66).

3. the protective device of open-end wrench nut according to claim 1 or bolt is characterized in that: at the interface place of each arc recess (62,63,64,65,66) Yu the clamping face of Jia Kou (61), all make the radian lead angle and modify.