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Arc-shaped opening pliers

An arc-shaped opening and pliers head technology, applied in the direction of pliers, hand-held tools, manufacturing tools, etc., can solve the problem of inability to penetrate the mounting hole, rotate the pin, etc., to increase the contact surface and facilitate the installation. , Reasonable design effect

Pending Publication Date: 2022-04-08
CRRC YONGJI ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a kind of arc-shaped cotter pincers, which cannot rotate the pin shaft quickly and accurately when installing the cotter pin, so that the cotter pin can be accurately loaded into the pin shaft mounting hole, and solve the problem of traditional needle-nose pliers when replacing the contactor pin. The technical problem that the pin shaft cannot be inserted into the mounting hole quickly and accurately

Method used

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Embodiment Construction

[0020] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0021] A curved opening pliers, such as figure 1 As shown, it includes a pliers body I3 composed of a pliers head I1 and a pliers handle I2 and a pliers body II6 composed of a pliers head II4 and a pliers handle II5. Such as figure 2 As shown, the jaws of pliers head I1 and pliers II4 are provided with step-shaped arc slots correspondingly, the small end of the step-shaped arc slots forms a small arc jaw part 8, and the large end of the step-shaped arc slots The end forms a large arc jaw portion 9.

[0022] During specific implementation, the radius of the small arc jaw portion 8 is 1.1-2 times the radius of the shaft body of the clamped pin shaft 10 . Preferably, the radius of the small arc jaw portion 8 is 1.5 times the radius of the shaft body of the clamped pin shaft 10 . Such as image 3 , 4 As shown, the small circular arc jaw por...

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Abstract

The arc-shaped opening pliers comprise a pliers body I (3) integrally formed by a pliers head I (1) and a pliers handle I (2) and a pliers body II (6) integrally formed by a pliers head II (4) and a pliers handle II (5), and the middle of the pliers body I (3) and the middle of the pliers body II (6) are connected through a riveting pin shaft (7). Step-shaped arc clamping grooves are correspondingly formed in the plier mouth portions of the plier head I (1) and the plier head II (4), small arc plier mouth portions (8) are formed at the small ends of the step-shaped arc clamping grooves, and large arc plier mouth portions (9) are formed at the large ends of the step-shaped arc clamping grooves. The arc jaw is used for replacing a straight jaw of a pair of needle-nose pliers, so that the contact area with a pin shaft is increased, the pin shaft can be accurately rotated to a proper position through the clamp, and a cotter pin can be conveniently installed.

Description

technical field [0001] The invention belongs to the technical field of maintenance auxiliary tools for main contactors in traction converters of motor vehicles, in particular to an arc-shaped opening pliers. Background technique [0002] With the increase of the operation time of the train, maintenance becomes more and more important for the safe operation of the train. As the main part of the traction converter, the main contactor is particularly important to overhaul due to its important role and frequent opening actions. [0003] At present, the main contactor used in the motor vehicle traction converter, the connection between the transmission mechanism and the main and auxiliary contacts basically adopts the method of cooperating between the pin shaft and the cotter pin. Due to the structural characteristics of the main contactor, the contacts and pins are inside the main contactor. Needle-nose pliers are needed for maintenance or replacement. Clamp the pin shaft with...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B25B7/00B25B7/02B25B27/02
Inventor 刘晨晓刘莉王海龙
Owner CRRC YONGJI ELECTRIC CO LTD
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