CN205465883U - Variable bore spanner - Google Patents

Abstract

The utility model discloses a variable caliber wrench, which comprises a wrench claw, a wrench front cover, a wrench back cover, a caliber adjusting disc, a locking device and a handle; the wrench front cover and the wrench back cover are respectively provided with fixing ears , and the locking device is fixed on the back cover of the wrench; the front cover of the wrench and the back cover of the wrench are fixed through the fixing ears by bolts; a cavity is formed between the front cover of the wrench and the back cover of the wrench, and the caliber adjustment disc and the wrench jaws are respectively arranged in the cavity; the caliber adjustment disc is provided with plane threads, and the back of the wrench jaws is provided with a thread groove matching the plane threads of the caliber adjustment disc; the wrench jaws pass through the thread grooves and the plane The thread is connected with the caliber adjusting disc; the variable caliber wrench is easy to operate and has strong gripping force, suitable for fastening and loosening any polygonal nuts and bolts with a caliber within the range of 5-80mm. It has strong practicability and is easy to popularize and use.

Description

A variable diameter wrench

technical field

The utility model relates to the technical field of wrenches, in particular to a variable caliber wrench.

Background technique

At present, known variable caliber wrenches mainly include variable caliber sleeve type, sliding stock variable caliber internal tooth wrench, adjustable wrench and the like. The variable caliber is mainly realized by continuously changing the sleeve, adjusting the movable opening of the inner tooth, and adjusting the distance between the movable opening and the fixed opening of the wrench.

In the existing known variable caliber wrench, when the caliber is variable, there are deficiencies such as constantly changing the sleeve, long adjustment time of the inner tooth live mouth, insufficient grip force for large diameter parts, and easy slipping of the jaws.

Contents of the invention

The existing technology is difficult to meet people's needs. In order to solve the above-mentioned problems, the utility model proposes a variable-caliber wrench, which is easy to operate and has strong gripping force. Tighten and loosen.

In order to achieve the above object, the utility model provides the following technical solutions: a variable caliber wrench, including a wrench claw, a wrench front cover, a wrench rear cover, a caliber adjustment disc, a locking device and a handle; the wrench front cover and the wrench The back cover is respectively provided with fixing ears, and the locking device is fixed on the wrench back cover; the wrench front cover and the wrench back cover are fixed by bolts passing through the fixing ears; the wrench front cover and the wrench back cover are formed There is a cavity, and the caliber adjustment disc and the wrench jaw are respectively arranged in the cavity; the caliber adjustment disc is provided with a plane thread, and the back of the wrench jaw is provided with a thread groove matching the plane thread of the caliber adjustment disc; The claw of the wrench is connected with the caliber adjusting disc through threaded grooves and flat threads; several grooves are evenly opened on the circumference of the caliber adjusting disc, and a square hole is opened in the center of the caliber adjusting disc; the handle is clamped in the square hole.

Further, there are three wrench claws, which are evenly screwed on the caliber adjustment disc at 120°.

Further, the diameter of the caliber adjustment disc is 150mm.

Further, the square hole is a square hole, and the side length of the square hole is 10 mm.

Further, there are three fixing ears, which are evenly distributed on the back cover of the wrench.

Compared with the prior art, the beneficial effect of the utility model is: the variable caliber wrench has simple operation and strong gripping force, and is suitable for tightening and loosening any polygonal nuts and bolts with a caliber within the range of 5-80mm, and can Widely used in the sealing and opening of large-diameter threaded sealing caps such as oil barrels and oil plugs, with stable performance; safe and reliable, easy to change diameter, strong practicability, and easy to promote and use.

Description of drawings

Fig. 1 is the schematic diagram of the structure of the caliber adjusting disc of the present utility model;

Fig. 2 is the schematic diagram of the structure of the back cover of the wrench of the present utility model;

Fig. 3 is a schematic diagram of the structure of the front cover of the wrench of the present invention;

In the figure: 1-wrench claw, 2-wrench front cover, 3-wrench back cover, 4-diameter adjustment disc, 5-locking device, 6-handle, 7-fixed ear, 8-flat thread, 9-concave Slot, 10-square hole.

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

Please refer to Fig. 1-3, an embodiment provided by the utility model: a variable caliber wrench, including a wrench claw 1, a wrench front cover 2, a wrench rear cover 3, a caliber adjustment disc 4, a locking device 5 and The handle 6; the wrench front cover 2 and the wrench back cover 3 are respectively provided with fixing ears 7, and the locking device 5 is fixed on the wrench back cover 3; the wrench front cover 2 and the wrench back cover 3 are passed through by bolts The fixed ear 7 is fixed; a cavity is formed between the wrench front cover 2 and the wrench rear cover 3, and the caliber adjustment disc 4 and the wrench claw 1 are respectively arranged in the cavity; the caliber adjustment disc 4 is provided with a plane Thread 8, and the back of the wrench jaw 1 is provided with a thread groove matching the plane thread of the caliber adjustment disc 4; the wrench jaw 1 is connected with the caliber adjustment disc 4 through the thread groove and the plane thread 8; the caliber adjustment disc 4 Several grooves 9 are evenly opened on the circumference, and a square hole 10 is opened at the center of the caliber adjustment disc 4; the handle 6 is clamped in the square hole 10; the wrench claw 1 is provided with three, and is 120° evenly Screwed on the caliber adjustment disc 4; the diameter of the caliber adjustment disc 4 is 150mm; the square hole 10 is a square hole, and the side length of the square hole 10 is 10mm; the fixed ear 7 is provided with three, and evenly distributed On the rear cover 3 of the wrench.

When the variable caliber wrench of the utility model is in use, firstly the handle 6 is set in the square hole 10 on the caliber adjusting disc 4, and rotates clockwise, and the caliber adjusting disc 4 starts to rotate clockwise. 4 Under the action of the upper plane thread 8, the three wrench jaws 1 move linearly towards the center of the wrench at the same time. When the diameter of the three wrench jaws 1 is consistent with the caliber of the nut or bolt head, the three wrench jaws 1 When grasping the nut or bolt head, press the locking device 5 on the back cover 3 of the wrench, and the locking device 5 will be inserted into the groove 9 of the diameter adjusting disc 4. Also no longer do linear motion to the center of the wrench, and three wrench claws 1 grasp the nut or the bolt head, when the handle 6 is rotated clockwise, the nut, the bolt can be tightened or loosened.

It is obvious to those skilled in the art that the present invention is not limited to the details of the above-mentioned exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, no matter from all points of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, so it is intended to be included in the claims All changes within the meaning and range of equivalents of the required elements are included in the present invention. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims (5)

1. A variable caliber wrench, characterized in that it includes a wrench claw (1), a wrench front cover (2), a wrench rear cover (3), a caliber adjustment disc (4), a locking device (5) and a handle (6); the wrench front cover (2) and the wrench back cover (3) are respectively provided with fixing ears (7), and the locking device (5) is fixed on the wrench back cover (3); the wrench front The cover (2) and the wrench back cover (3) are fixed through the fixing ear (7) by bolts; a cavity is formed between the wrench front cover (2) and the wrench back cover (3), and the caliber adjustment disc ( 4) and the wrench claw (1) are respectively arranged in the cavity; the said caliber adjusting disc (4) is provided with a flat thread (8), and the back of the wrench claw (1) is provided with a plane threaded with the caliber adjusting disc (4). Threaded grooves matching the threads; the wrench claw (1) is connected with the caliber adjusting disc (4) through the threaded grooves and flat threads (8); several grooves ( 9), and a square hole (10) is opened at the center of the caliber adjustment disc (4); the handle (6) is clamped in the square hole (10). 2. A variable caliber wrench according to claim 1, characterized in that: there are three wrench claws (1), which are evenly screwed on the caliber adjusting disc (4) at 120°. 3. A variable caliber wrench according to claim 1, characterized in that: the diameter of the caliber adjusting disc (4) is 150mm. 4. A variable caliber wrench according to claim 1, characterized in that: the square hole (10) is a square hole, and the side length of the square hole (10) is 10 mm. 5. A variable caliber wrench according to claim 1, characterized in that: there are three fixing ears (7), which are evenly distributed on the back cover (3) of the wrench.