CN201579730U - chain wrench - Google Patents

Abstract

The utility model discloses a chain wrench, which comprises a handle, a fixed plate mouth and a chain. The fixed plate mouth has a fixed plate head, and the fixed plate head is connected with a movable plate mouth through a first fulcrum. The board head, the tail end of the movable board head is connected with the adjusting part, and the adjusting part adjusts the rotation of the movable board head around the first fulcrum at a certain angle. The utility model can solve the problem that fine adjustment cannot be performed without major modification, has simple structure, ingenious design, convenient use and portability, and wide application range.

Description

chain wrench

Technical field:

The utility model relates to a hand tool, in particular to a wrench for fastening, connecting or clamping.

Background technique:

The traditional wrench is usually composed of a handle and a fixed wrench of a certain size, and the scope of use is very limited; while the common movable wrench mostly uses a worm gear device, and the size of the wrench must be adjusted by the wrench adjustment device when using it. The movable wrench and the fixed wrench first clamp the object to be wrenched, and then turn the handle, so that the wrench automatically locks the object to be wrenched and drives it to rotate together. However, it is often not suitable for some objects with specific shapes, which greatly limits the scope of use of this wrench; meanwhile, the adjustment of the wrench opening of this wrench is not very convenient. The utility model patent with the publication number CN2409015Y discloses an adjustable self-locking wrench, which is composed of a handle, a fixed plate mouth and a chain, which greatly expands the scope of use. The following problems still exist when the wrench is used: one is that the wrench only The length of the ring can be adjusted to match the work object by adjusting the position where the hook is connected to the chain, but fine-tuning cannot be performed; second, once the work object is relatively smooth, the wrench often cannot effectively match it, resulting in the inability to fasten the work object.

Utility model content:

The technical problem to be solved by the utility model is to provide a chain wrench aiming at the above deficiencies, by adding fine-tuning tools to solve the problem of fine-tuning ring length, and by increasing the friction force of the contact surface of the working object to solve the problem of being unable to fasten. Ingenious structure, easy to use and so on.

The technical scheme adopted in this utility is:

A chain wrench, including a handle, a fixed plate mouth and a chain, the fixed plate mouth has a fixed plate head, the fixed plate head is connected to the movable plate mouth through the first fulcrum, and the head end of the movable plate mouth is provided with a movable plate head. The tail end of the board head is connected with the adjustment piece, and the movable board head can be rotated around the first fulcrum at a certain angle by adjusting the adjustment piece.

The adjustment member is an adjustment rod connected to the handle or the mouth of the fixed plate through the second fulcrum, a nut is screwed on the adjustment rod, and the tail end of the movable plate head is connected on the adjustment rod.

The chain has regular or irregular serrated openings to increase the contact friction between the work object and the chain.

The utility model can solve difficult problems without major modification, has simple structure, ingenious design, convenient use and portability, and wide application range.

Description of drawings:

Fig. 1 is the structural representation of the utility model.

Detailed ways:

Below in conjunction with accompanying drawing, the utility model is further described:

As shown in Figure 1, the tail end of the handle 10 of the chain wrench has a fixed plate mouth 20, the tail end of the fixed plate mouth 20 is connected with a chain 30, the head end of the fixed plate mouth 20 has a fixed plate head 21, and the fixed plate head 21 passes through The first fulcrum 22 is connected with a movable plate mouth 40, and the head end of the movable plate mouth 40 is provided with a movable plate head 41, and the movable plate head 41 is connected with the tail end of the chain 30, and the tail end of the movable plate head 41 is connected to the adjusting rod 50, the adjustment rod 50 is connected to the handle 10 or the fixed plate mouth 20 through the second fulcrum 52, the nut 51 is screwed on the adjustment rod 20, and the chain 30 has regular or irregular serrated openings 31 to increase the working object Contact friction with the chain.

Claims (3)

1. chain wrench, include handle, fixed head mouth and chain, has fixedly wrench on the fixed head mouth, it is characterized in that: fixedly wrench is connected with the portable plate mouth by first fulcrum, the head end of portable plate mouth is provided with movable wrench, the tail end of movable wrench is connected with adjustment part, by adjusting adjustment part, movable wrench is rotated to an angle around first fulcrum.

2. chain wrench as claimed in claim 1 is characterized in that: adjustment part is connected with nut for be connected the adjusting lever on handle or the fixed head mouth by second fulcrum on the adjusting lever, the tail end cross-under of movable wrench is on adjusting lever.

3. chain wrench as claimed in claim 1 or 2 is characterized in that: chain has rule or irregular zigzag opening.

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