Spreading clamp

A technology of jaws and movable arms, which is applied in the field of splicing pliers and hand tools, and can solve problems such as the inability to complete narrow gaps.

Inactive Publication Date: 2009-11-18
VALTRA (SHANGHAI) MASCH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The design of the wedge-shaped jaws solves the problem that the related stretching pliers using the pliers body in the prior art cannot complete narrow gap stretching, and improves its adaptability; when simple stretching is required, a single movable arm or a fixed The wedge-shaped jaws of the arm are completed, and the wedge-shaped jaws formed by the jaws of the two arms can also be used to complete the lifting support

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Such as figure 1 and figure 2 The supporting pliers shown, the clamp body is similar to the common spring type pliers, including the fixed arm 12, the movable arm 11, the fixed handle 22, and the movable handle 21, and a certain adjustment mechanism is formed by springs and other components between them. The adjustment of the adjustment mechanism is used to adjust the opening and closing of the angle between the fixed arm 12 and the movable arm 11. The fixed arm 12 and the movable arm 11 are arranged crosswise. An adjusting tail screw 31 is arranged at the end of the clamp, and a knurl 311 at the end of the tail screw A lever rocker 312 is placed horizontally on the upper side. Shaking the rocker 312 can quickly adjust the relationship between the fixed arm 12 and the movable arm 11, and when the clamp is in a tightened state and cannot continue to manually apply force, the rocker 312 can be used to apply a larger force. force.

[0033]A fixed arm working jaw set 5 a...

Embodiment 2

[0041] Such as Figure 7 Compared with the supporting tongs in the first embodiment, the other supporting tong structure shown is mainly different in the structure of the wedge-shaped jaws. The upper part of the jaw set can form a working jaw surface 42B, which can cooperate with the working jaw surface 52 .

Embodiment 3

[0043] Such as Figure 8 In yet another supporting structure shown, in the working jaw part, the upper and lower jaw structures are basically symmetrically arranged, and have corresponding working jaw surfaces 41, 51 and 42, 52 respectively.

[0044] Such as Figure 9 The support joint structure shown, the support joint 7 is used as the connection accessory of the accessory installation hole in the above embodiment. The support joint has a thread conversion structure, that is, one side of the thread is adapted to the size of the accessory installation hole, and the other side has a different thread. The diameter can be used to switch and connect different accessories, and a larger section of the thread also forms a jaw working surface 71, which can serve as a supporting force surface when bracing.

[0045] The supporting jaw structure of the present invention is not limited to the various types mentioned above, for example, there may be other forms of pushing the working jaw ...

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PUM

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Abstract

The invention relates to a spreading clamp which comprises a movable arm, a fixed arm, a movable handle, a fixed handle and a regulating mechanism, wherein the movable arm and the fixed arm are partially or totally crossly arranged from the process that the clamp is fully opened to the process that the clamp is closed, the movable arm and the fixed arm are provided with corresponding working clampopenings, the regulating mechanism is used for regulating the opening and closing size of the movable arm and the fixed arm, local or total corresponding working clamp openings of the movable arm andthe fixed arm together form a wedged clamp opening, the clamp opening surface of which is inserted into a narrower target clearance. The design of the wedged clamp opening solves the problem that thenarrower clearance can not be spread by adopting the relevant spreading clamp of a lock wrench body in the prior art, and improves the adaptability. One side of the fixed arm and one side of the movable arm, of which the working clamp openings correspond to each other, are provided with corresponding column bulges naturally extending along the side direction. The spreading clamp can be used for repairing workpieces of damaged or extruded and distorted circular or rectangular steel tubes, and the like.

Description

technical field [0001] The invention relates to a hand tool, in particular a splint pliers used to stretch or expand a gap or distance, which is used in fields such as carpentry, welding, machining, and maintenance. Background technique [0002] In the prior art, when the operator completes tasks such as bracing, propping, and lifting, the operator will use tools such as brace clamps. The present invention is mainly aimed at an improvement of this type of clamp. The following aspects are disclosed in the prior art: kind of clamp. [0003] The U.S. patent No. US 5,501,126 discloses a crossing-jawlocking pliers, which is based on the traditional vise, and is used to complete the back support of the workpiece by setting the clamping arms crossed The operation, and in order to increase the friction of the working surface, there is a tooth pattern on the working surface. [0004] The U.S. patent No. US 5,423,236 discloses an adjustable spreading locking pliers (adjustable sprea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B25B7/02B25B7/12
Inventor 王汉义覃勤
Owner VALTRA (SHANGHAI) MASCH CO LTD
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