Importance

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Abstract

The invention provides a wrench, includes a body, a fixed jaw, a movable jaw, a slidable connecting member and a handle which is rotatably connected with the body. The movable jaw forms a slidable connection with the body via the slidable connecting member. The wrench includes a jaw locking mechanism which is rotatably connected with the handle. The jaw locking mechanism is used for restricting the slidable connecting member to move towards to and away from the fixed jaw relative to the body. The invention provides a wrench of which the distance between the jaws is capable of increasing. The fixed jaw and the movable jaw are capable of slipping away from the apexes of the workpiece, which realizes rotating the workpiece continuously and repetitiously. Thus the work efficiency of the wrench is improved. The wrench has a simple structure, and it is capable of enduring larger torque. At the same time, simple structure also simplifies the manufacturing process of the wrench, reducing the costs of manufacture. The first flexible member is internally installed in the body, which makes the first flexible member avoid contacting oil stain in use and the wrench provided by the invention more beautiful at the same time. The worm gear of the wrench uses a double start thread structure, which reduces the time of adjusting the distance between jaws and increases the bearable torque of the worm gear.

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First Claim