CN201329560Y - Fixing wrench for continuous use - Google Patents

Abstract

The utility model discloses a fixing wrench for continuous use, which comprises a wrench handle and a wrench head. The fixing wrench is characterized in that the two sides of the wrench head are oppositely provided with a long claw and a short claw; the height of the long claw is more than the height of the short claw; the long claw and the short claw form a working jaw; the long working clamp side of the long claw is arranged in parallel to the short working clamp side of the short claw; and an arc-shaped clamp side is arranged in front of the short working clamp side and connected with the short working clamp side. With the long claw and the short claw, the working jaw can clamp the bolt head or nut for continuous and reciprocating turning; the wrench is not required to be removed off the bolt head or nut for angle displacement during the turning process, thereby leading to continuous, simple and reliable operation. The utility model reduces the required operating time, and effectively improves the working efficiency. Moreover, the utility model has the advantages of simple structure, small size, convenient manufacture and low cost,, and can be used as the standby tool in each industry.

Description

The back-up wrench that can use continuously

Technical field

The utility model relates to a kind of back-up wrench, is specifically related to a kind of back-up wrench that can use continuously.

Background technology

Spanner is a kind of instrument commonly used, and its scope of application is very wide, all is widely used in every profession and trades such as automobile industry, engineering mechanical device, pipeline science of bridge building, shipbuilding metallurgy, generating, papermaking.Spanner of a great variety, modal is back-up wrench, be mainly used to screw or looser a bolt head or nut, its structure is simple relatively, and the scope of application is wider.

The now present back-up wrench that uses, the work pawl height unanimity at driving end jaw two ends, in use, rotation is pulled in behind certain angle, the driving end jaw need be got from bolt head or nut, and after turning round certain angle in the other direction, again the driving end jaw be blocked bolt head or nut, be rotated further spanner then, bolt head or nut are locked or unclamp.So repeat multi-pass operation, driving end must be got from bolt head or nut, re-use behind the revolution certain angle, so repetitive operation is than trouble.As publication number is the back-up wrench of CN2442791, the work pawl length unanimity at the jaw two ends of this spanner, and piece-holder gets very tightly during work, spanner must be taken out and could continue to operate after putting again.

The utility model content

Can not continued operation at back-up wrench of the prior art, ineffective deficiency, the utility model provides a kind of need not driving end to be got from bolt head or nut the back-up wrench that can use continuously of high efficiency.

The technical solution of the utility model is: a kind of spanner that can use continuously, comprising the spanner handle, is driving end at the front end of spanner handle, it is characterized in that: be oppositely arranged long pawl and short pawl in the both sides of driving end, the height of long pawl forms the work jaw greater than the height of short pawl between long pawl and the short pawl; The long working clamp limit of long pawl parallels with the short working clamp limit of short pawl, and the front end on short working clamp limit is arc pincers limits, arc pincers limit and short working clamp limit smooth connection.

Further feature is: the height of long pawl approximately is the twice of short pawl height.

The height of described short pawl is d, and the height on short working clamp limit is approximately d/2, and the radius on arc pincers limit is approximately d/2

Described long working clamp limit is parallel with the axis of spanner handle with short working clamp limit.

With respect to prior art, the utlity model has following advantage:

1, by long pawl and short pawl are set, make jaw can block bolt head or nut and come and go continuously and pull, do not need in the process spanner got from bolt head or nut and carry out the angle transposition, make operation continuous, easy, reliable;

2, reduced under the bigger situation of operation required time, particularly workload, can effectively increase work efficiency;

3, simple in structure, volume is little, and is easy to make, and cost is low, can be used as the standing instrument of every profession and trade.

Description of drawings

The structural representation of the back-up wrench that Fig. 1 can use continuously for the utility model;

Among the figure, 1-spanner handle, 2-driving end, the long pawl of 3-, the short pawl of 4-, the 5-jaw of work, the long working clamp of 6-limit, 7-lacks the working clamp limit, and the 8-arc clamps the limit.

The specific embodiment

The utility model is described in further detail below in conjunction with the drawings and specific embodiments.

The spanner that can use continuously of the present utility model comprises spanner 1, at spanner 1 front end is provided with driving end 2, driving end 2 front openings; Be relatively set with long pawl 3 and short pawl 4 in the both sides of driving end 2, form work jaw 5 between long pawl 3 and the short pawl 4, the long working clamp limit 6 of long pawl 3 parallels with the short working clamp limit 7 of short pawl 4, the length on long working clamp limit 6 is greater than the length on short working clamp limit 7, and the front end on short working clamp limit 7 is arc pincers limits 8; Long working clamp limit 6, short working clamp limit 7 constitute the stressed limit of this patent spanner; Driving end is not being got under the situation of bolt head or nut, and arc pincers limit 8 does not hinder spanner work jaw 5 revolution in the other direction.The height of long pawl 3 specifically can approximately be the twice of short pawl 4 height greater than the height of short pawl 4; The height of establishing short pawl 4 among the figure is d, and the height on short working clamp limit 7 is approximately d/2, and the radius on arc pincers limit 8 that is arranged on the front end on short working clamp limit 7 is approximately d/2, arc pincers limit 8 and short working clamp limit 7 smooth connections.

The described spanner that can use continuously, long working clamp limit 6 is parallel 1 axis with spanner with short working clamp limit 7 among the figure.

As a kind of example structure more specifically, treat that as hypothesis the nominal dimension between moving bolt head two opposite side of plate is S, distance between then long working clamp limit 6 and the short working clamp limit 7 is 1.015S, the height of long pawl 3 is 0.6S, the height of short pawl 4 is 0.3S, the height on short working clamp limit 7 is 0.15S, and the radius on arc pincers limit 8 is d/2, and the long working clamp limit 6 of work jaw 5 both sides and short working clamp limit 7 are the angle of 1 axis formation 120 ° with respect to spanner.

When using spanner of the present utility model to screw or to looser a bolt head or nut, if the bolt head of right-hand thread or nut are positioned over left end with long pawl 3, short pawl 4 is positioned over right-hand member, spanner is pulled 1 clockwise with the workpiece chucking in the long working clamp limit 6 of spanner and short working clamp limit 7, and this moment is for loading.Because workpiece is stressed on 6 tops, long working clamp limit when loading, 7 roots are stressed on short working clamp limit, and workpiece may outwards slide at an end of long pawl 3, but since the length on long working clamp limit 6 greater than the size of workpiece, spanner is clamping work pieces all the time, the maintenance loading; If pull spanner 1 counterclockwise, this moment is opposite during being subjected to force direction and turning clockwise on the workpiece, because short working clamp limit 7 length on edge are very short in the short pawl 4, workpiece skids off arc pincers limit 8 easily, work jaw 5 is when axis of workpiece turns round in the other direction, on workpiece, skid,, do not work the effect of pulling for idle running is returned.If left-hand thread is positioned over right-hand member with long pawl 3, short pawl 4 is positioned over left end, long pawl 3 and short pawl 4 reversing of position, pulls spanner counterclockwise 1, is loading this moment, returns 1 for idle running as if pulling spanner clockwise, and is inoperative.

Claims (4)

1, a kind of back-up wrench that can use continuously, comprise that spanner is (1), at spanner is the front end of (1) driving end (2), it is characterized in that: be oppositely arranged long pawl (3) and short pawl (4) in the both sides of driving end (2), the height of long pawl (3) forms work jaw (5) greater than the height of short pawl (4) between long pawl (3) and the short pawl (4); The long working clamp limit (6) of long pawl (3) parallels with the short working clamp limit (7) of short pawl (4), and the front end on short working clamp limit (7) is arc pincers limits (8), arc pincers limits (8) and short working clamp limit (7) smooth connection.

2, according to the described back-up wrench that can use continuously of claim 1, it is characterized in that: the height of long pawl (3) is the twice of short pawl (4) height.

3, according to the described back-up wrench that can use continuously of claim 1, it is characterized in that: the height of described short pawl (4) is d, and the height on short working clamp limit (7) is d/2, and the radius on arc pincers limits (8) is d/2.

4, according to the arbitrary described back-up wrench that can use continuously of claim 1 to 3, it is characterized in that: described long working clamp limit (6) is parallel the axis of (1) with spanner with short working clamp limit (7).