CN201979436U - Novel open ratchet wrench - Google Patents

Abstract

The utility model discloses a novel open ratchet wrench. The novel open ratchet wrench comprises a wrench head, the wrench head comprises an upper claw and a lower claw, a wedging block groove is formed on the inner wall of the upper claw, a wedging block and a return spring are arranged in the wedging block groove, one end of the wedging block is propped against the return spring, a shaft pin hole is formed on the wedging block, a shaft pin is arranged in the shaft pin hole, the two ends of the shaft pin are fixed on the wrench head to limit the expansion and retraction of the wedging block, a groove is formed in the middle of the wedging block, and the two ends of the wedging block are propped against a nut. The wrench provided by the utility model has the advantages that due to the groove formed on the wedging block, a sharp corner of the nut can be accommodated in the groove when the wedging block clamps a working face of the nut, so as to prevent the abrasion between the sharp corner of the nut and the wedging block when the nut is wrenched, which can reduce the damage to the nut and prolong the service life of the nut; and the structure of the wrench is simple, and the manufacture is convenient.

Description

A kind of novel open ratchet spanner

Technical field

The utility model relates to a kind of spanner.

Background technology

Can not work continuously in the time of common fork spanner work, every turn once just need withdraw to be carried out down could continuing turn behind the side, relatively wastes time and energy.The Wedge-type fork spanner of Chu Xianing can overcome this defective afterwards, realized continuous turn nut.But general Wedge-type fork spanner structure is comparatively complicated, and the voussoir of the spanner working face that blocks nut rubs between wedge angle meeting of nut and the voussoir when pulling, and has grown that the wearing and tearing of nut will be comparatively serious afterwards the time, influences its later use.

Summary of the invention

The purpose of this utility model provides a kind of novel open-end wrench simple in structure, when pulling nut than the wearing and tearing of primary nut.

The technological means of dealing with problems: a kind of novel open ratchet spanner, comprise spanner, described spanner comprises dewclaw and lower claw, has wedge groove on the inwall of dewclaw, is provided with voussoir and back-moving spring in the wedge groove, voussoir one end props up back-moving spring, have pin hole on the voussoir, be provided with pivot pin in the pin hole, pivot pin two is fixed on stretching in order to the restriction voussoir on the spanner, be provided with a groove in the middle of the voussoir, voussoir two and nut offset.

As preferably, described lower claw inwall is provided with Baltimore groove.

Spanner of the present utility model is provided with a groove on voussoir, voussoir is when blocking the working face of nut like this, the wedge angle of nut just can be contained in the groove, when pulling nut like this, wearing and tearing have just been avoided between its wedge angle and the voussoir, make the damage of nut less, prolonged its service life; Spanner is simple in structure, easy to make simultaneously.

Description of drawings

Fig. 1 is a part-structure cutaway view of the present utility model;

Fig. 2 does not install the part-structure cutaway view of voussoir for spanner.

The specific embodiment

As shown in Figure 1, 2, a kind of novel open ratchet spanner comprises spanner 1, and spanner 1 comprises dewclaw 21 and lower claw 22, have wedge groove 3 on the inwall of dewclaw 21, be provided with voussoir 4 and back-moving spring 5 in the wedge groove 3, voussoir 4 one ends prop up back-moving spring 5, have pin hole 6 on the voussoir 4, be provided with pivot pin 7 in the pin hole 6, pivot pin 7 two are fixed on the spanner 1 flexible in order to restriction voussoir 4, are provided with a groove 8 in the middle of the voussoir 4, and voussoir 4 two and nut offset.

In the time of spanner work, the both sides of voussoir two and nut offset, the wedge angle of nut just can be contained in the groove 8 of voussoir 4 centres, the lower end of nut and the lower claw of spanner 22 offset, the dextrorotation wrench, nut is by turn, and the wedge angle of nut does not contact with voussoir, so can not be worn, the spanner turn is after certain angle, the revolution spanner, voussoir 4 meeting quilts are along wedge groove 3 past returning back to top, and compression reseting spring 5, throw off between voussoir 4 and the nut like this, spanner can not turn round can drive nut, thereby realizes the ratcher function of unidirectional turn.

Lower claw 22 inwalls are provided with Baltimore groove 9 simultaneously, and the wedge angle of nut lower end also can be contained in the Baltimore groove 9 like this, avoid wearing and tearing.

Claims (2)

1. novel open ratchet spanner, comprise spanner (1), it is characterized in that: described spanner (1) comprises dewclaw (21) and lower claw (22), have wedge groove (3) on the inwall of dewclaw (21), be provided with voussoir (4) and back-moving spring (5) in the wedge groove (3), voussoir (4) one ends prop up back-moving spring (5), have pin hole (6) on the voussoir (4), be provided with pivot pin (7) in the pin hole (6), pivot pin (7) two is fixed on spanner (1) and goes up stretching in order to restriction voussoir (4), be provided with a groove (8) in the middle of the voussoir (4), voussoir (4) two and nut offset.

2. a kind of novel open ratchet spanner as claimed in claim 1 is characterized in that described lower claw (22) inwall is provided with Baltimore groove (9).

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