CN104690660B

CN104690660B - Adjustable pliers

Info

Publication number: CN104690660B
Application number: CN201310659219.8A
Authority: CN
Inventors: 王暋
Original assignee: Hangzhou Great Star Tools Co Ltd; Hangzhou Great Star Industrial Co Ltd
Current assignee: Hangzhou Great Star Tools Co Ltd; Hangzhou Great Star Industrial Co Ltd
Priority date: 2013-12-06
Filing date: 2013-12-06
Publication date: 2020-03-31
Anticipated expiration: 2033-12-06
Also published as: CN104690660A

Abstract

The invention discloses an adjustable clamp, which comprises a first handle and a second handle, wherein the front end of the first handle is provided with a first clamping part, the front end of the second handle is provided with a second clamping part, the first clamping part and the second clamping part form a jaw, the first handle and the second handle are arranged in an intersecting way and are relatively fixed through a connecting mechanism, it is characterized in that the second handle is provided with a long strip-shaped tooth socket at the position of the connecting mechanism, the inner side part of the tooth socket is provided with a toothed belt, the connecting mechanism comprises a toothed block which is arranged in the toothed groove and meshed with the toothed belt on the toothed groove, and a linkage mechanism connected with the tooth block, the linkage mechanism drives the tooth block to rotate and separate from the occlusion with the tooth socket, so that the first handle can move along the tooth grooves relative to the second handle through the movement of the connecting mechanism, wherein the teeth on the toothed belt are one-way ratchet teeth.

Description

Adjustable pliers

Technical Field

The invention relates to a pair of pliers, in particular to a pair of pliers with jaws capable of being adjusted rapidly.

Background

The traditional pliers are provided with two intersected pliers arms which can rotate around a pivot of an intersection point to achieve the purpose of gripping an object, a jaw for gripping the object is formed above the intersection point, and a gripping pliers handle is arranged below the intersection point. However, the expandable size of the jaws of such pliers is fixed and the range of sizes of articles that can be gripped is limited.

A forceps with adjustable jaw size as disclosed in US5845551 appeared. One of the forceps arms is provided with a long notch at the position of the intersection point, the side wall of the notch is provided with teeth distributed along the side wall, and the other forceps arm can gradually move for a certain distance along the teeth of the notch at the intersection point and can be fixed on any tooth, so that the size of the forceps jaws can be adjusted.

However, this pliers is of the type which is reversible, i.e. the pivot at the point of intersection has an adjustment switch which, when opened, allows the two pliers arms to move relative to each other. When the switch is turned off, the two clamp arms are relatively fixed in position and can be normally used. The disadvantage of this design is the inconvenience of use. When the clamp is used, the switch is firstly turned on, the switch is maintained in an open state, the jaw is opened to be larger than the size of a clamped article, and then the jaw is gradually reduced to achieve the purpose of just clamping the article. The process of expanding and contracting the jaws requires the switch to be maintained in an open state, and the size of the jaws can be adjusted. This is very inconvenient for the user, so that further improvement is required. Not only does the switch not need to be held all the time in the process of changing the jaw, but also the design of the switch is simpler and more convenient.

Disclosure of Invention

The invention aims to provide pliers with a jaw size which only needs to be adjusted by a switch in one direction, and can be adjusted without the switch in the other direction, so that the jaw is stabilized on an object to be clamped.

It is another object of the present invention to provide pliers with adjustable jaw size wherein the adjustment switch is simple in design and easy to use.

In order to achieve the purpose, the invention provides adjustable pliers, which comprise a first handle and a second handle, wherein the front end of the first handle is provided with a first clamping part, the front end of the second handle is provided with a second clamping part, the first clamping part and the second clamping part form a jaw, the first handle and the second handle are arranged in an intersecting way and are relatively fixed through a connecting mechanism, it is characterized in that the second handle is provided with a long strip-shaped tooth socket at the position of the connecting mechanism, the inner side part of the tooth socket is provided with a toothed belt, the connecting mechanism comprises a toothed block which is arranged in the toothed groove and meshed with the toothed belt on the toothed groove, and a linkage mechanism connected with the tooth block, the linkage mechanism drives the tooth block to rotate and separate from the occlusion with the tooth socket, whereby movement of said first handle relative to said second handle along said gullet by movement of said connection mechanism.

The teeth on the toothed belt are one-way ratchets.

The linkage mechanism comprises a pivot which is arranged in the through hole of the tooth block and is rotationally connected with the tooth block and a trigger mechanism which is connected with the pivot, the pivot is driven by the trigger mechanism to move, and the pivot further rotates along with the tooth block.

The first handle has a side opening in the side wall at the connection to receive the corresponding position of the second handle therethrough, forming a first portion of the first handle at an upper portion of the second handle and a second portion of the first handle at a lower portion of the second handle, wherein the pivot passes through the first portion of the first handle and then through the gullet of the second handle to pass through the second portion of the first handle.

And the other side of the teeth, meshed with the tooth grooves, of the tooth block is provided with a fixing part and an elastic part, and the elastic part is connected to the fixing part and is abutted against the second handle.

The fixed part is a spring hole, the elastic piece is a second spring, and the second spring is arranged in the spring hole.

First clamping part and second clamping part all establish to be hook-shaped to inboard edge is provided with the tooth, makes things convenient for centre gripping and interlock.

The first clamping part and the first handle are integrally formed or connected together through a connecting means, and the second clamping part and the second handle are integrally formed or connected together through a connecting means.

In another embodiment, the outer side of the pivot is provided with a spiral second groove, a guide pin is arranged on the spiral second groove, the other end of the guide pin extends into the inner part of the toothed block from the side part, and the trigger mechanism further comprises a trigger switch, and when the trigger switch generates a downward acting force, the guide pin rotates along the spiral second groove, so that the toothed block is driven to rotate.

The trigger mechanism further includes a toothed ring having internal teeth fixedly disposed within an outer recess of the first portion of the first handle and a first spring disposed below the trigger switch and within the toothed ring.

Drawings

FIG. 1 is a schematic diagram of a preferred embodiment of the present invention.

Fig. 2 is an exploded view of a preferred embodiment of the present invention.

Fig. 3 is an exploded view from another angle of a preferred embodiment of the present invention.

Fig. 4 is a partially enlarged exploded view of a preferred embodiment of the present invention.

Detailed Description

As shown in fig. 1-4, an adjustable forceps comprises a first handle 5 and a second handle 9, the first handle 5 is provided with a first clamping portion 2 at the front end, the second handle 9 is provided with a second clamping portion 1 at the front end, the first clamping portion 2 and the second clamping portion 1 form a jaw, the first handle and the second handle are arranged in an intersecting manner and are relatively fixed through a connecting mechanism, wherein the second handle is provided with an elongated tooth socket 91 at the connecting mechanism position, the inner side of the tooth socket 91 is provided with a toothed belt 92, the connecting mechanism comprises a tooth block 3 which is arranged in the tooth socket 91 and is meshed with the toothed belt 92 distributed on the tooth socket 91 and a linkage mechanism connected with the tooth block, the linkage mechanism drives the tooth block 3 to rotate and is separated from being meshed with the tooth socket 91, so that the first handle 5 can move along the tooth socket 91 relative to the second handle 9 along with the movement of the connecting mechanism to change the size of the jaw, wherein teeth on the toothed belt are unidirectional teeth, i.e. the teeth are each inclined diagonally in one direction, as shown in figure 1 by the arrow in the gullet. Therefore, when the tooth is stressed in the opposite direction of inclination, namely in the opposite direction of an arrow, the tooth belt and the tooth block are separated by a barb to ensure that the tooth block can slide in the tooth groove under the action of external force. And in the direction that the tooth inclines, in the arrow direction, the cingulum can push the tooth piece and overcome the elastic force and break away from the tooth on the cingulum automatically, does not need the intervention of external force to realize one-way quick slip.

Specifically, the one-way ratchet means that the teeth of the toothed belt extend from the groove edge to a direction obliquely upward, such as an arrow in the tooth socket in fig. 1, when the jaw needs to be enlarged, that is, when the first handle is pulled downward from the uppermost position of the tooth socket (i.e., moved in the direction opposite to the arrow), the engagement between the tooth block and the toothed belt needs to be removed by the trigger element, and when the first handle is pulled upward from the lower position of the tooth socket (i.e., moved in the direction of the arrow), the tooth block can move freely along the tooth socket even if the tooth block and the toothed belt are in the engaged state due to the one-way ratchet. Thus, when the jaws are opened, the article is placed into the jaws, and then the jaws are conveniently reduced to a state of just holding the article.

The adjustable clamp may be a water pump clamp, a pipe clamp or other clamps. Wherein two clamping parts are all set to hook-like to the inboard side is provided with the tooth, makes things convenient for centre gripping and interlock. The first clamping part and the first handle are integrally formed or connected together through a connecting means, and the second clamping part and the second handle are integrally formed or connected together through a connecting means.

The first handle 5 and the connecting mechanism are relatively fixed, the linkage mechanism comprises a pivot 11 arranged in the through hole of the toothed block 3 and a trigger mechanism connected with the pivot, the pivot is driven by the trigger mechanism to move, and the pivot further rotates with the toothed block, so that the toothed block is separated from the toothed belt, and the relative movement is possible.

The first handle 5 has a first through hole at the position of the pivot, the pivot is cylindrical and has a circular cross section, the pivot passes through the first through hole and continues to pass through the tooth socket of the second handle 9, and the first handle 5 and the second handle 9 are relatively fixed.

More specifically, the first handle has a lateral hole in the lateral wall at the connection means, through which a corresponding position of the second handle can be received, forming a first portion of the first handle, located at the upper part of the second handle, and a second portion of the first handle, located at the lower part of the second handle. The hub shaft extends through a first portion of the first handle and then through the gullet of the second handle and then through a second portion of the first handle. The tooth block is positioned inside the tooth socket of the second handle and is meshed with the tooth socket.

One side of the tooth block is provided with teeth which can be meshed with the toothed belt, and the other opposite side is provided with a fixing part and an elastic part, wherein the elastic part is connected to the fixing part and is abutted against the second handle. In particular, the fixed part may be a spring hole, and the elastic element, in particular the second spring 8, is arranged in the spring hole, abutting against the second handle. Thus, after the trigger element is released, the teeth of the toothed block can be restored to the meshed state with the teeth on the toothed belt due to the action of the second spring, so that the gear can be normally used.

In one embodiment, as shown in fig. 1-4, the pivot 11 has a spiral second groove 12 on its outer side, on which a guide pin 31 is disposed, and the other end of the guide pin extends into the inside of the tooth block from its side, and the trigger mechanism 4 further includes a trigger switch 41, when the trigger switch generates a downward force, the guide pin 31 rotates along the spiral second groove 12, so as to drive the tooth block 3 to rotate, thereby disengaging the tooth block from the tooth socket, and enabling the first handle to move along the tooth socket relative to the second handle.

The trigger mechanism further comprises a toothed ring 42 with internal teeth fixedly arranged in an outer recess of the first part of the first handle and a first spring 43 arranged below the trigger switch and in the toothed ring, and the first spring 43 is arranged in an outer recess of the first part of the first handle, and the trigger switch has external teeth engageable with the internal teeth of the toothed ring. Under the normal condition, trigger switch and ring gear are the detached state, and under the effect of first spring, trigger switch is by first spring jack-up, and trigger switch's external tooth separates with the internal tooth of ring gear, after pushing down trigger switch, during trigger switch's external tooth got into the internal tooth of ring gear, because the ring gear is fixed, so after the internal tooth of ring gear and trigger switch's external tooth interlock, trigger switch stall, pilot pin 31 produced the rotation along spiral second recess 12, thereby the drive tooth piece 3 rotates. The inner diameter of the first spring is gradually reduced from the bottom to the direction of the trigger switch, the bottom is arranged in a toothed ring 42 with internal teeth, which is concave on the outer side of the first part of the first handle, and the top is contacted with the bottom of the trigger element.

The pivot axis has a smaller head on the trigger element outside the first portion of the first handle above the second handle so that it can be fixed inside the trigger element outside the first handle. While the other end, outside the second portion of the first handle, is fixed to the other end of the pivot by a fixing element 10. The other end of the pivot may be a screw thread and the fixing element 10 is a nut, the pivot being fixed by rotating the screw thread to the nut.

The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.

Claims

1. An adjustable pair of pliers comprises a first handle and a second handle, wherein a first clamping part is arranged at the front end of the first handle, a second clamping part is arranged at the front end of the second handle, the first clamping part and the second clamping part form a jaw, the first handle and the second handle are arranged in an intersecting manner and are relatively fixed through a connecting mechanism, and the adjustable pair of pliers is characterized in that the second handle is provided with an elongated tooth socket at the position of the connecting mechanism, a toothed belt is arranged at the inner side part of the tooth socket, the connecting mechanism comprises a toothed block which is arranged in the tooth socket and meshed with the toothed belt on the tooth socket, and a linkage mechanism connected with the toothed block, the linkage mechanism drives the toothed block to rotate and is separated from the tooth socket, so that the first handle can move along the tooth socket relative to the second handle through the movement of the connecting mechanism; the linkage mechanism comprises a pivot shaft which is arranged in the through hole of the tooth block and is rotationally connected with the tooth block and a trigger mechanism which is connected with the pivot shaft, the pivot shaft is driven by the trigger mechanism to move, and the pivot shaft further rotates along with the tooth block; the outer side of the pivot is provided with a spiral second groove, a guide pin is arranged on the spiral second groove, the other end of the guide pin extends into the tooth block from the side part, the trigger mechanism further comprises a trigger switch, and after the trigger switch generates a downward acting force, the guide pin rotates along the spiral second groove so as to drive the tooth block to rotate, so that the tooth block is disengaged from the tooth groove, and the first handle moves along the tooth groove relative to the second handle;

the trigger mechanism further comprises a toothed ring with internal teeth fixedly arranged in an outer side recess of a first part of the first handle and a first spring arranged below the trigger switch and in the toothed ring, wherein the first spring is arranged in an outer side recess of the first part of the first handle, and the trigger switch is provided with external teeth which are meshed with the internal teeth of the toothed ring;

under the effect of first spring, trigger switch by first spring jack-up, trigger switch the external tooth with the internal tooth separation of ring gear, after pushing down trigger switch, trigger switch's the external tooth gets into in the internal tooth of ring gear, because the ring gear is fixed, works as the ring gear the internal tooth with trigger switch's the external tooth interlock back, trigger switch stall, the pilot pin produces the rotation along the spiral second recess, thereby drives the tooth piece rotates.

2. The adjustable clamp of claim 1 wherein the teeth on the toothed belt are one-way ratchets.

3. The adjustable forceps of claim 1 wherein the first handle has a side opening in a side wall at the connection mechanism for receiving a corresponding location of the second handle therethrough to form a first portion of the first handle at an upper portion of the second handle and a second portion of the first handle at a lower portion of the second handle, wherein the pivot axis passes through the first portion of the first handle and then through a gullet in the second handle to pass through the second portion of the first handle.

4. The adjustable clamp of claim 3 wherein said tooth block has a fixed portion on the other side of the teeth engaging the gullet and a resilient member connected to the fixed portion and abutting said second handle.

5. The adjustable clamp of claim 4, wherein said fixed portion is a spring hole and said resilient member is a second spring, said second spring being disposed within said spring hole.

6. The adjustable clamp of claim 5 wherein said first and second clamping portions are each configured as a hook and have teeth on an inner edge to facilitate clamping and engagement.

7. The adjustable clamp of claim 6, wherein said first gripping portion is integrally formed with said first handle or connected thereto by a connecting means, and said second gripping portion is integrally formed with said second handle or connected thereto by a connecting means.