CN118769150A - Clamping tools - Google Patents

Abstract

The present invention discloses a clamping tool, which belongs to a manual tool. The two clamping jaws of the existing clamping tool have a small holding force on the workpiece, and the types of workpieces that the tool is suitable for clamping are limited. The present invention configures at least one clamping member on at least one clamping jaw, which adjusts its posture according to the shape of the workpiece when clamping the workpiece to reliably clamp the workpiece. When the clamping tool is used to clamp the workpiece, the clamping member adjusts its posture according to the shape of the workpiece to reliably clamp the workpiece. The two clamping jaws have a large holding force on the workpiece. The clamping tool is suitable for clamping a variety of types (shapes) of workpieces, and the scope of application is expanded. The present invention also adjusts the size of the clamping space between the first clamping jaw and the second clamping jaw by axially pressing the shaft assembly to disengage the positioning tooth groove, so as to be suitable for clamping workpieces of different specifications.

Description

Clamping tools

Technical Field

The invention belongs to a manual tool, and in particular relates to a clamping tool.

Background Art

A clamping tool, such as a water pump pliers, generally has two jaws, and the workpiece (object) is clamped or released by changing the relative positions of the two jaws.

There is usually an angle between the two jaws of the clamping tool, which may cause the following problems during use:

The shapes of the two jaws are difficult to adapt to the shapes of various workpieces. When clamping the workpiece, the two jaws will squeeze the workpiece toward the opening direction of the two jaws, resulting in a small holding force of the two jaws on the workpiece, and even the workpiece may slip due to being squeezed, resulting in the types (shapes) of workpieces that the clamping tool is suitable for clamping being limited.

The existing clamping tools cannot be replaced after the clamping jaws (such as the biting teeth) are damaged, which causes the entire tool to be scrapped.

In addition, the existing clamping tool is not convenient for adjusting the clamping space between the two clamping jaws, and it is inconvenient to operate when clamping workpieces of different specifications.

Summary of the invention

The technical problem to be solved and the technical task proposed by the present invention are to overcome the defects of the existing clamping tools, that is, the two jaws have a small holding force on the workpiece and the types of workpieces that the tools are suitable for clamping are limited, and to provide a clamping tool suitable for reliably clamping workpieces of various shapes, and on this basis to improve the operating convenience of the clamping tool.

To achieve the above-mentioned purpose, the clamping tool of the present invention comprises a first handle and a second handle which are rotatably connected together through an axis assembly, a first clamping jaw is arranged at the front end of the first handle, a second clamping jaw is arranged at the front end of the second handle, a clamping space is maintained between the first clamping jaw and the second clamping jaw, the first handle and the second handle are held so that the first clamping jaw and the second clamping jaw are brought close to each other, and the first handle and the second handle are opened so that the first clamping jaw and the second clamping jaw are opened to each other, and the feature is that: at least one clamping member is arranged on at least one clamping jaw, which adjusts its posture according to the shape of the workpiece when clamping the workpiece so as to reliably clamp the workpiece.

When the clamping tool clamps a workpiece, the clamping part adjusts its posture according to the shape of the workpiece to reliably clamp the workpiece. The two clamping jaws have a strong holding force on the workpiece. The clamping tool is suitable for clamping workpieces of various types (shapes), and the scope of application is expanded.

In order to adjust the positional relationship between the workpiece and the clamping member when clamping the workpiece to reliably clamp the workpiece, the clamping member is configured to adapt to the shape of the clamped workpiece in at least one direction of the depth direction, width direction and lateral direction of the clamping space.

In one embodiment, a single clamping member is disposed on each of the first clamping jaw and the second clamping jaw, and the single clamping member on the first clamping jaw and the single clamping member on the second clamping jaw are disposed in pairs, thereby enabling the clamping member to clamp the workpiece from opposite directions of the workpiece, thereby increasing the reliability of clamping the workpiece.

In one embodiment, in order to increase the ability and flexibility of the clamping member to adjust its posture according to the shape of the workpiece when clamping the workpiece, groups of clamping members are configured on the first jaw and the second jaw, and the groups of clamping members on the first jaw and the groups of clamping members on the second jaw are configured in pairs.

Specifically, the group of clamping members includes a front clamping member and at least two secondary clamping members constituting a clamping assembly, the front clamping member is assembled on the clamping jaw, and the secondary clamping member is assembled on the front clamping member, and when clamping a workpiece, the front clamping member and the secondary clamping member adjust their postures according to the shape of the workpiece to reliably clamp the workpiece. Accordingly, the workpiece can be reliably clamped by adjusting the postures of the front clamping member and the secondary clamping member.

Further, in order to clamp the workpiece from multiple positions, the single clamping member or the group of clamping members includes at least one pair. Moreover, at least one pair of single clamping members or the group of clamping members is distributed along the depth direction of the clamping space.

In order to facilitate assembly, especially to facilitate replacement of the clamping member, the clamping member is assembled via a pin shaft so as to swing around the pin shaft to adjust the posture.

In order to apply a sufficiently large holding force to the workpiece through the clamp, the clamp is configured to slide along the arc surface to adjust the posture. The arc surface can provide a larger support surface for the clamp, and when a sufficiently large holding force is applied to the workpiece through the clamp, the clamp and the assembly connection structure of the clamp will not be damaged.

In order to constrain the clamping member to a position sliding along the arc surface and simplify the structure, a constraining hole is arranged concentrically with the arc surface, and a rod is passed through the constraining hole. The constraining hole or the rod is arranged on the clamping member to constrain the clamping member to a position sliding along the arc surface and guide the clamping member to slide along the arc surface.

In order to make the constraint structure regular, the rod is connected between two parallel first side walls and second side walls, a gap is formed between the first side walls and the second side walls, and the constraint hole is arranged on a middle wall, and the middle wall is located in the gap.

In order to make the arc surface bear force evenly, the arc surface is arranged on the peripheral surfaces of the first side wall and the second side wall and on both sides of the middle wall corresponding to the peripheral surfaces.

In one embodiment, the clamping member is provided with a first elastic element for maintaining the clamping member in an initial state, so as to restore the clamping member to the initial state after the clamping member changes its posture due to clamping the workpiece.

In a specific implementation, the clamping part of the clamping member is a plane, an inner concave surface or an outer convex surface (cylindrical surface or spherical surface). The clamping member is in the shape of a square, a semi-cylindrical, a crescent, a cylindrical, a hemispherical or a spherical shape. In order to increase the reliability of the clamping member in clamping the workpiece, the clamping part of the clamping member is provided with a bite tooth.

In order to constrain the clamping member within a reasonable posture adjustment range and avoid the clamping member being unable to clamp the workpiece due to excessive posture adjustment, a limiting portion for limiting the posture adjustment range of the clamping member is provided on the clamping member.

In order to adjust the size of the clamping space to suit clamping workpieces of different specifications, the first handle has a long hole, and a positioning tooth groove is set on the first edge of the long hole; the shaft assembly is rotatably configured on the second handle and penetrates the long hole of the first handle, and the shaft assembly has positioning teeth. The positioning teeth rely on the positioning elastic force to engage with the positioning tooth groove to position the shaft assembly to fix the relative position of the first handle and the second handle. At this time, the clamping space is determined, and the shaft assembly is axially pressed to overcome the positioning elastic force so that the positioning teeth disengage the positioning tooth groove to enable the shaft assembly to move along the long hole to adjust the relative position of the first handle and the second handle, thereby adjusting the size of the clamping space.

In order to facilitate operation, the shaft assembly includes a pivot and a swinging member, the pivot is configured to move axially, and a push-pull portion is provided on the pivot; the positioning tooth is provided on the swinging member, the swinging member is movably located in the long hole, the swinging member is sleeved on the pivot through the pivot hole and cooperates with the axial movement of the pivot, the pivot hole has an inclined surface facing the push-pull portion, the inclined surface leans against the push-pull portion by the positioning elastic force, and when the pivot is pressed axially, the push-pull portion applies force to the inclined surface to cause the swinging member to swing around the pivot in the direction of the positioning tooth disengaging the positioning tooth groove. Accordingly, by holding the second handle with a hand and axially pressing the pivot with the fingers of the hand to disengage the positioning tooth groove, the shaft assembly can be moved in the long hole to adjust the size of the clamping space.

In order to ensure that the positioning elastic force always exists when the shaft assembly moves along the long hole, the swinging member has a blind hole facing the second edge of the long hole, and a second elastic element is built into the blind hole. The second elastic element provides the positioning elastic force, and the second elastic element is supported on the second edge of the long hole and slidably cooperates with the second edge of the long hole. Therefore, when the shaft assembly moves along the long hole, the second elastic element slides on the second edge of the long hole to provide the positioning elastic force.

In order to ensure that the axial movement of the pivot is converted into the swing of the swinging part, the pivot is prevented from rotating when the pivot moves axially. To this end, the shaft assembly includes a stop member, which is located in the long hole and is configured to move along the long hole. The stop member is sleeved on the pivot through the stop hole and cooperates with the axial movement of the pivot.

In order to reset the pivot after the pivot is axially pressed, a third elastic element acts on the pivot, and the third elastic element applies an elastic force to the pivot in a direction opposite to the direction in which the pivot is axially pressed.

In order to ensure reliable assembly of the shaft assembly and stable and non-deflected holding force when holding the first handle and the second handle to clamp the workpiece, the second handle has a first wall and a second wall, and a gap is maintained between the first wall and the second wall; the portion of the first handle where the long hole is provided is located in the gap between the first wall and the second wall and is laterally limited by the first wall and the second wall; the pivot is rotatably assembled on the first wall and the second wall of the second handle, the pivot includes a shaft segment, a first end cover fixedly arranged at one end of the shaft segment, and a second end cover assembled at the other end of the shaft segment, the first end cover and the second end cover are separately exposed on the outer side surface of the first wall and the outer side surface of the second wall; the push portion is arranged on the shaft segment.

The present invention configures at least one clamping member on at least one clamping jaw, which adjusts its posture according to the shape of the workpiece when clamping the workpiece so as to reliably clamp the workpiece. When the clamping tool clamps the workpiece, the clamping member adjusts its posture according to the shape of the workpiece when clamping the workpiece so as to reliably clamp the workpiece. The two clamping jaws have a large holding force on the workpiece, and the clamping tool is suitable for clamping various types (shapes) of workpieces, thereby expanding its scope of application.

The clamping piece of the present invention is assembled on the clamping claw, and clamping the workpiece will not cause damage to the clamping claw; and the clamping piece can be replaced after being damaged, thereby saving the use cost of the clamping tool.

The present invention provides a long hole on the first handle, and a positioning tooth groove on the first edge of the long hole; and the shaft component is rotatably arranged on the second handle and penetrated through the long hole of the first handle. The shaft component has positioning teeth, and the positioning teeth rely on the positioning elastic force to mesh with the positioning tooth groove to position the shaft component to fix the relative position of the first handle and the second handle. The shaft component is axially pressed to overcome the positioning elastic force so that the positioning teeth disengage the positioning tooth groove so that the shaft component can move along the long hole to adjust the relative position of the first handle and the second handle, thereby adjusting the size of the clamping space to be suitable for clamping workpieces of different specifications.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of an orthographic projection of a clamping tool according to an embodiment of the present invention;

FIG2 is an isometric view of the clamping tool shown in FIG1 ;

FIG3 is a schematic diagram of the structural decomposition of the clamping tool shown in FIG1-2;

FIG4 is a schematic diagram of the structure shown in FIG3 from another viewing angle;

FIG5 is a schematic diagram of the assembly relationship between the shaft assembly and the long hole of the second handle according to Embodiment 1 of the present invention;

FIG6 is a schematic diagram of the structure shown in FIG5 from another viewing angle;

FIG7 is a left side view of the clamping tool shown in FIG1 when the first clamping jaw and the second clamping jaw are brought together to reduce the clamping space;

Fig. 8 is a cross-sectional view taken along the line A-A of Fig. 7;

FIG9 is an enlarged view of portion A in FIG8 ;

Fig. 10 is a cross-sectional view taken along line B-B of Fig. 9;

FIG11 is a schematic diagram of the matching relationship between the push-butting portion on the shaft segment and the swinging member in Example 1;

FIG12 is a schematic diagram of an orthographic projection of a second embodiment of a clamping tool according to the present invention;

FIG13 is an isometric view of the clamping tool shown in FIG12;

FIG14 is a schematic diagram of an orthographic projection of a third embodiment of a clamping tool according to the present invention;

FIG15 is an isometric view of the clamping tool shown in FIG14;

16 is a schematic diagram of the assembly relationship between the front-stage clamping member and the first clamping jaw in Example 3 of the clamping tool of the present invention;

FIG17 is an exploded schematic diagram of the structure shown in FIG16 ;

FIG18 is a schematic diagram of an orthographic projection of a fourth embodiment of a clamping tool according to the present invention;

FIG19 is a schematic diagram of the structural decomposition of the clamping tool of Embodiment 5 of the present invention;

FIG20 is a schematic diagram of FIG19 from another viewing angle;

FIG21 is a schematic diagram of the structural decomposition of the clamping tool of Example 6 of the present invention;

FIG22 is a schematic diagram of the structural decomposition of a clamping tool according to a seventh embodiment of the present invention;

Description of the numbers in the figure:

100 first handle: 101 first clamping jaw, 102 constraint hole, 103 middle wall, 104 long hole, 105 first edge, 106 positioning tooth groove, 107 second edge, 108 mounting groove, 109 first V-shaped groove;

200 second handle: 201 second clamping jaw, 202 first wall, 203 second wall, 204 gap, 205 first circular groove, 206 first axial hole, 207 notch, 208 second circular groove, 209 second axial hole, 210 second V-shaped groove;

300 shaft assembly: 301 positioning tooth, 302 pivot, 303 swing member, 304 push portion, 305 pivot hole, 306 inclined surface, 307 blind hole, 308 second elastic element, 309 anti-rotation member, 310 anti-rotation hole, 311 third elastic element, 312 shaft section, 313 first end cover, 314 second end cover, 315 anti-rotation plane,

400 clamping space;

500 clamping member, 501 pin shaft, 502 engaging teeth, 503 limiting portion, 504 first elastic element, 505 triangular assembly portion, 506 clamping portion;

600 Supporting assembly: 601 front clamping member, 602 secondary clamping member, 603 arc surface, 604 rod, 605 first side wall, 606 second side wall, 607 gap.

DETAILED DESCRIPTION

In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution in the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiment of the present invention. Obviously, the described embodiment is a part of the embodiment of the present invention, not all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

The terms "including" and "having" and any variations thereof in the specification and claims of the present invention are intended to cover non-exclusive inclusions. For example, a method or product comprising a series of technical features is not necessarily limited to those technical features clearly listed, but may also include other technical features that are not clearly listed and can be included in the method or product.

In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", "both sides", "outer" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. Among them, "upper" and "lower", "left" and "right" are opposite in direction, "both sides" include "left" and "right", and "outer" refers to the surface of the product facing away from the center of the product.

In the description of the present invention, it is necessary to understand that the technical features defined by the terms "first", "second" and the like with sequential concepts are only for the purpose of clearly describing the defined technical features so that the defined technical features can be clearly distinguished from other technical features, but do not represent such naming in actual implementation, and therefore cannot be understood as a limitation of the present invention.

The present invention is described in detail below in conjunction with specific embodiments and accompanying drawings.

Example 1

As shown in FIG1-11, the clamping tool is a water pump pliers. It includes a first handle 100 and a second handle 200 that are rotatably connected together via an axis assembly 300. A first clamping jaw 101 is provided at the front end of the first handle. A second clamping jaw 201 is provided at the front end of the second handle. A clamping space 400 is maintained between the first clamping jaw 101 and the second clamping jaw 201. The first handle and the second handle are held so that the first clamping jaw and the second clamping jaw are brought close to each other to clamp a workpiece located in the clamping space, and the first handle and the second handle are opened so that the first clamping jaw and the second clamping jaw are opened to each other to loosen the workpiece or to clamp the workpiece.

The first handle 100 has a long hole 104 , a first edge 105 of the long hole 104 is provided with a positioning tooth groove 106 , and a second edge 107 of the long hole is a plane.

The second handle 200 has a first wall 201 and a second wall 203, and a gap 204 is maintained between the first wall and the second wall. A first circular groove 205 is provided on the outer side of the first wall, and a first shaft hole 206 is provided on the bottom of the first circular groove. The main body of the first shaft hole is a circular hole for rotationally matching with the shaft segment described below and supporting the shaft segment. The first shaft hole has a notch 207 for the push-butt portion to pass through when assembling the shaft segment. A second circular groove 208 is provided on the outer side of the second wall 203, and a second shaft hole 209 is provided on the bottom of the second circular groove. The second shaft hole is a circular hole for rotationally matching with the shaft segment described below and supporting the shaft segment. The first shaft hole and the second shaft hole are located on the same axis.

The shaft assembly 300 includes a pivot 302, a swinging member 303, and a stopper 309. The pivot 302 includes a shaft section 312, a first end cap 313 fixed to one end of the shaft section, and a second end cap 314 assembled to the other end of the shaft section. The shaft section 312 is a circular shaft with a stopper plane 315. A pin is fixed to the shaft section 312 as a push-butt portion 304. The width of the swinging member 303 is slightly smaller than the width of the long hole 104. The swinging member 303 is provided with a pivot hole 305, and the pivot hole has an inclined surface 306 facing the push-butt portion. The swinging member is provided with a positioning tooth 301 facing the first edge 105 and a blind hole 307 facing the second edge 107. The stopper 309 is a plate member, on which a semi-cylindrical stopper hole 310 is provided, and the width of the stopper is equivalent to the width of the long hole. When the stopper is located in the long hole, it can move along the long hole and cannot rotate in the long hole. The shaft section cooperates with the semi-cylindrical anti-rotation hole 310 through the anti-rotation plane to limit the rotation of the shaft section.

The part of the first handle 100 where the long hole is provided is located in the gap 204 between the first wall 202 and the second wall 203 and is laterally limited by the first wall and the second wall. The swinging member 303 and the stop member 309 are located side by side in the long hole and are also laterally limited by the first wall and the second wall and cannot escape from the long hole. The blind hole 307 is built with a second elastic element 308, which is a helical compression spring and is supported between the second edge 107 of the long hole and the swinging member 303 to provide a positioning elastic force to the swinging member. The second elastic element is also slidably matched with the second edge 107 of the long hole. The third elastic element is sleeved on the shaft section 312, and the third elastic element is also a helical compression spring. The shaft section 312 passes through the first shaft hole 206, the pivot hole 305, the stop hole 310, and the second shaft hole 209 in sequence, and then is connected to the second end cover 314. The first end cap 313 is located in the first circular groove 205 and exposed on the outer side of the first wall, and the second end cap 314 is located in the second circular groove 208 and exposed on the outer side of the second wall. The third elastic element 311 is squeezed between the first wall 202 and the first end cap 313. The direction in which the third elastic element applies elastic force to the pivot is opposite to the direction in which the pivot is axially pressed. In view of the above structure, the shaft section 312 is rotationally matched with the first shaft hole 206 and the second shaft hole 209, the pivot 312 is rotationally assembled on the first wall and the second wall of the second handle, the shaft assembly is rotationally configured with the second handle, and the pivot can move axially. In addition, the shaft assembly is inserted into the long hole of the first handle, the swinging member is sleeved on the pivot through the pivot hole and cooperates with the axial movement of the pivot, and the stop member is sleeved on the pivot through the stop hole and cooperates with the axial movement of the pivot.

The positioning teeth 301 mesh with the positioning tooth groove 106 by means of the positioning elastic force to position the shaft assembly to fix the relative position of the first handle and the second handle, and the inclined surface 306 leans against the push portion by means of the positioning elastic force. As shown in FIG10 , the first end cover 313 is pressed axially to the left to overcome the positioning elastic force, so that the shaft section 312 moves axially relative to the first handle 100, the second handle 200, the swinging member 303 and the stop member 309, and the push portion 304 applies force to the inclined surface 306 to cause the swinging member to swing around the shaft section 312 in the direction in which the positioning teeth disengage from the positioning tooth groove (counterclockwise direction as shown in FIG9 ), so that the positioning teeth disengage from the positioning tooth groove, and then the swinging member 303 and the stop member 309 can move along the long hole, that is, the shaft assembly can move along the long hole to adjust the relative position of the first handle and the second handle. The axial pressure on the pivot is removed, and the pivot is reset to the state shown in Figures 9-10 under the elastic force applied to the pivot by the third elastic element. The swinging member is also reset to the state shown in Figures 9-10 under the elastic force of the second elastic element.

In this embodiment, the positioning tooth groove 106 faces upwards, and the positioning teeth 301 face downwards. Therefore, when the pivot is not pressed, the shaft assembly can also be moved upwards along the long hole, and the positioning teeth will be pushed by the positioning tooth grooves to make the swinging member swing. The positioning teeth produce a rattling sound when sliding through the positioning tooth grooves one by one. On the contrary, due to the direction restrictions of the positioning tooth grooves and the positioning teeth, the shaft assembly cannot be moved downwards along the long hole when the pivot is not pressed. In this way, the positioning teeth are engaged with the positioning tooth grooves by the positioning elastic force, and the shaft assembly is positioned to fix the relative position of the first handle and the second handle, so as to prevent the positioning teeth from slipping out of the positioning tooth grooves when clamping the workpiece, and ensure that the first clamping jaw and the second clamping jaw can apply a holding force to the workpiece by holding the first handle and the second handle.

In this embodiment, a clamping member 500 is configured on both the first clamping member and the second clamping member to adjust the posture according to the shape of the workpiece so as to reliably clamp the workpiece. Specifically, two single clamping members 500 are configured on both the first clamping member and the second clamping member through a pin 501 to adjust the posture by swinging around the pin. The clamping member on the first clamping member and the clamping member on the second clamping member are configured in pairs. Moreover, the two pairs of single clamping members are distributed along the depth direction of the clamping space 400. In this embodiment, as shown in FIG2 , the clamping part of the clamping member is a plane, the clamping part is provided with an occlusal tooth 502, the clamping member is in a square shape, and the end of the clamping member is provided with a limiter 503 for limiting the posture adjustment range of the clamping member. Further, as shown in FIG8 , a first V-shaped groove 109 is provided on the first clamping member, and a second V-shaped groove 210 is provided on the second clamping member to provide a movable space for the swing of the clamping member. Therefore, when the clamping tool of this embodiment is used to clamp a workpiece, the clamping member swings around the pin shaft to adjust its posture according to the shape of the workpiece so as to reliably clamp the workpiece. The swing of the clamping member around the pin shaft can adapt to the shape of the clamped workpiece in the depth direction and width direction of the clamping space (see Figure 21), thereby reliably clamping the workpiece. The two clamping jaws have a large holding force on the workpiece, and the clamping tool is suitable for clamping various types (shapes) of workpieces, thereby expanding the scope of application.

Example 2

As shown in Figures 12-13, the clamping tool is also a water pump pliers. The only difference between it and Example 1 is the shape of the clamping member. In this embodiment, the clamping member 500 is semi-cylindrical. The rest of the structure is the same as that of Example 1 and will not be repeated.

Example 3

As shown in Figures 14-17, the clamping tool is used to clamp irregularly shaped workpieces. The only difference between it and Example 1 is that the clamping member configuration is different. In this embodiment, the first clamping jaw and the second clamping jaw are both configured with a group of clamping members, and the group of clamping members includes a front-stage clamping member 601 and two secondary clamping members 602 constituting a holding assembly. The front-stage clamping member is assembled on the first clamping jaw 101 and the second clamping jaw 201, and the secondary clamping member 602 is assembled on the front-stage clamping member 601. Moreover, the holding assembly on the first clamping jaw is configured in pairs with the holding assembly on the second clamping jaw.

Moreover, in this embodiment, the front clamping member 601 and the two secondary clamping members 602 are configured to adjust the posture by sliding along the arc surface 603. The constraint hole 102 is arranged concentrically with the arc surface, and the rod 604 is passed through the constraint hole 102, so as to constrain the clamping member in a position to slide along the arc surface and guide the clamping member to slide along the arc surface.

In this embodiment, as shown in Fig. 16-17, taking the assembly of the front-stage clamping member 601 and the first clamping jaw 101 as an example, the front-stage clamping member 601 is provided with a first side wall 605 and a second side wall 606, a gap 607 is formed between the first side wall and the second side wall, and the rod 604 is connected between the two parallel first side walls and the second side walls. The first clamping jaw 101 has a middle wall 103, the constraint hole 102 is arranged on the middle wall 103, and the middle wall 103 is located in the gap 607. The arc surface 603 is provided on the peripheral surface of the first side wall and the second side wall and on both sides of the middle wall corresponding to the peripheral surface.

The assembly method of the front-stage clamping member and the second clamping jaw and the assembly method of the secondary clamping member and the front-stage clamping member are the same as the assembly method of the front-stage clamping member and the first clamping jaw.

Furthermore, in this embodiment, the front-stage clamping member and the secondary clamping member are crescent-shaped.

The clamping tool of this embodiment, when clamping a workpiece, both the front clamping member and the secondary clamping member automatically adjust their postures according to the shape of the workpiece to reliably clamp the workpiece. The sliding of the front clamping member and the secondary clamping member along the arc surface causes the clamping member to adapt to the shape of the clamped workpiece in the depth direction and width direction of the clamping space (see FIG. 21 ), thereby reliably clamping the workpiece, thereby being able to reliably clamp irregularly shaped workpieces.

In other embodiments, the holding components may be two pairs, and the two pairs of holding components are distributed along the depth direction of the clamping space. Moreover, the rod and the restraining hole may be interchanged.

Example 4

As shown in Figure 18, the difference between the clamping tool and the embodiment 1 is only that the clamping member is configured differently. In this embodiment, the clamping member 500 is cylindrical, and its clamping part is an outer convex surface. The rest of the structure is the same as that of the embodiment 1 and will not be repeated.

In this embodiment, the contact relationship between the clamping member and the clamped workpiece is adjusted by rotating the clamping member, so that the clamping member adapts to the shape of the clamped workpiece in the depth and width directions of the clamping space (see Figure 21) based on its own shape, guides the workpiece to the appropriate position, thereby reliably clamping the workpiece and ensuring that the holding force of the clamping member on the workpiece is not offset or tilted.

Example 5

As shown in Figures 19-20, the difference between the clamping tool and the embodiment 1 is that the assembly relationship and configuration of the clamping member and the clamping jaw are different. In this embodiment, the first clamping jaw 101 and the second clamping jaw 201 both have an assembly groove 108, and the clamping member 500 has a triangular assembly portion 505, which extends to the assembly groove and is swingably assembled on the first clamping jaw and the second clamping jaw through the pin 501. The clamping member acts on a first elastic element 504 for keeping the clamping member in an initial state. The initial state is a state in which the clamping member relies on the clamping jaw by the elastic force of the first elastic element. In this embodiment, the first elastic element 504 is a linear spring wire, which is wound on the pin and supported at both ends on the corresponding clamping jaw and the clamping member. Accordingly, after use, when the clamping member changes its posture due to clamping the workpiece, it can rely on the elastic force of the first elastic element to reset to the initial state, which is convenient for subsequent use of clamping the workpiece. The remaining structures can be the same as those in embodiment 1 and will not be repeated.

Example 6

As shown in FIG. 21 , the difference between the clamping tool and the embodiment 5 is only that the clamping part of the clamping member is different. In this embodiment, the clamping part 506 is a V-shaped surface, which is an inner concave surface, and the V-shaped surface extends along the depth direction of the clamping space, that is, the extension direction of the V-shaped surface is perpendicular to the axis of the pin. The surface of the V-shaped surface can be formed with spaced protrusions or step structures. When performing the clamping action, the protrusions or step structures can be stuck on the surface of workpieces of different shapes by fine-tuning the position of the clamping tool, assisting the clamping tool to reliably clamp the workpiece. In this embodiment, because the clamping member has the ability to swing around the pin and the V-shaped surface has a certain width, the clamping member can adapt to the shape of the clamped workpiece in the depth direction, width direction and lateral direction (see FIG. 21 ) of the clamping space, thereby reliably clamping the workpiece. The remaining structures are the same as those in the embodiment 1 and will not be repeated.

According to this embodiment, in other embodiments, the V-shaped surface may extend along the lateral direction of the clamping space, that is, the extending direction of the V-shaped surface is parallel to the axis of the pin shaft.

Example 7

As shown in FIG22, the difference between the clamping tool and the embodiment 1 is that the shape of the clamping member and its assembly relationship with the clamping jaws are different. In this embodiment, the first clamping jaw 101 and the second clamping jaw 201 have relative planes, and the clamping member 500 is spherical and fixed on the plane of the corresponding clamping jaw by welding or the like, and its clamping part is an outer convex surface. When clamping the workpiece, the spherical surface of the clamping member will guide the workpiece to adjust its posture and guide the workpiece to be in the appropriate position, so that the clamping force on the workpiece is not offset or tilted. Moreover, the spherical surface will not damage the surface of the workpiece. In this embodiment, the clamping member on the same clamping jaw adapts to the shape of the clamped workpiece in the depth direction and lateral direction of the clamping space (see FIG21) due to its own shape, thereby reliably clamping the workpiece.

The remaining structures are the same as those in Example 1 and will not be described in detail.

According to this embodiment, in other embodiments, the clamping member can be rotated about an axis perpendicular to the plane of the clamping jaws.

In addition to the aforementioned embodiments, in other embodiments, the clamping portion of the clamping member may also be an inner concave surface or an outer convex surface in the form of a semi-cylindrical, cylindrical, hemispherical, or spherical surface.

In the aforementioned embodiments, the structures different from other embodiments can be applied to other embodiments under the guidance of the present invention without causing mutual exclusion.

Claims (23)

1. The clamping tool comprises a first handle (100) and a second handle (200) which are rotationally connected together through a beam assembly (300), wherein a first clamping jaw (101) is arranged at the front end of the first handle, a second clamping jaw (201) is arranged at the front end of the second handle, a clamping space (400) is kept between the first clamping jaw and the second clamping jaw, the first clamping jaw and the second clamping jaw are mutually closed by holding the first handle and the second handle, and the first clamping jaw and the second clamping jaw are mutually opened by opening the first handle and the second handle, and the clamping tool is characterized in that: at least one clamping jaw is provided with at least one clamping piece (500) which can automatically adjust the gesture according to the shape of the workpiece when clamping the workpiece so as to reliably clamp the workpiece.

2. The clamping tool of claim 1, wherein: the clamping member (500) is configured to adapt to a shape of a clamped workpiece in at least one of a depth direction, a width direction, and a lateral direction of the clamping space (400).

3. The clamping tool of claim 1, wherein: the first clamping jaw (101) and the second clamping jaw (201) are respectively provided with a single clamping piece, and the single clamping piece on the first clamping jaw and the single clamping piece on the second clamping jaw are arranged in pairs.

4. The clamping tool of claim 1, wherein: the first clamping jaw (101) and the second clamping jaw (201) are respectively provided with a group of clamping pieces, and the group of clamping pieces on the first clamping jaw and the group of clamping pieces on the second clamping jaw are arranged in pairs.

5. The clamping tool of claim 4, wherein: the group of clamping pieces comprises a front-stage clamping piece (601) and at least two secondary clamping pieces (602) which form the clamping assembly, the front-stage clamping piece is assembled on the clamping jaw, the secondary clamping pieces are assembled on the front-stage clamping piece, and when the workpiece is clamped, the front-stage clamping piece and the secondary clamping pieces can automatically adjust the postures according to the shape of the workpiece so as to reliably clamp the workpiece.

6. A gripping tool according to any of claims 3 to 5, characterised in that: a single clamp or a group of clamps includes at least one pair.

7. The clamping tool of claim 6, wherein: at least one pair of individual clamping elements or groups of clamping elements is distributed in the depth direction of the clamping space (400).

8. A gripping tool according to any of claims 1-5, characterised in that: the clamping piece (500) is assembled through a pin shaft (501) to swing around the pin shaft to adjust the posture.

9. A gripping tool according to any of claims 1-5, characterised in that: the clamp is configured to slide along an arc surface (603) to adjust the attitude.

10. The clamping tool of claim 9, wherein: a restraint hole (102) is arranged concentrically with the circular arc surface, a rod (604) is penetrated in the restraint hole, and the restraint hole or the rod is arranged on the clamping piece to restrain the clamping piece at a position sliding along the circular arc surface and guide the clamping piece to slide along the circular arc surface.

11. The clamping tool of claim 10, wherein: the rod (604) is connected between two parallel first side walls (605) and second side walls (606), a gap (607) is formed between the first side walls and the second side walls, the constraint hole (102) is configured on a middle wall (103), and the middle wall (103) is positioned in the gap (607).

12. The clamping tool of claim 11, wherein: the arc surface (603) is arranged on the peripheral surfaces of the first side wall and the second side wall and on two side parts of the middle wall corresponding to the peripheral surfaces.

13. A gripping tool according to any of claims 1-5, characterised in that: the clamp is acted upon by a first resilient element (504) to hold the clamp in an initial state.

14. The clamping tool of claim 1, wherein: the clamping part (506) of the clamping piece is a plane, an inner concave surface or an outer convex surface.

15. The clamping tool of claim 14, wherein: the clamping part (506) of the clamping piece is provided with a biting tooth (502).

16. The clamping tool of claim 1, wherein: the clamping piece is square, semi-cylindrical, crescent, cylindrical, hemispherical or spherical.

17. The clamping tool of claim 1, wherein: the clamping piece is provided with a limiting part (503) for limiting the posture adjustment range of the clamping piece.

18. The clamping tool of claim 1, wherein: the first handle (100) is provided with a long hole (104), and a first edge (105) of the long hole is provided with a positioning tooth slot (106); the shaft assembly (300) is rotatably arranged on the second handle (200) and penetrates through the long hole (104) of the first handle, the shaft assembly is provided with positioning teeth (301), the positioning teeth (301) are meshed with the positioning tooth grooves (106) by means of positioning elastic force to position the shaft assembly to fix the relative position of the first handle and the second handle, and the shaft assembly is axially pressed to overcome the positioning elastic force to enable the positioning teeth to be separated from the positioning tooth grooves so that the shaft assembly can move along the long hole to adjust the relative position of the first handle and the second handle.

19. The clamping tool of claim 18, wherein: the shaft assembly (300) comprises a pivot (302) and a swinging piece (303), wherein the pivot (302) is configured to axially move, and a pushing part (304) is arranged on the pivot (302); the swing piece (303) is provided with the positioning teeth (301), the swing piece (303) is movably positioned in the long hole (104), the swing piece (303) is sleeved on the pivot through the pivot hole (305) and axially moves and is matched with the pivot, the pivot hole (305) is provided with an inclined surface (306) facing the pushing part, the inclined surface leans against the pushing part by means of positioning elastic force, and when the pivot is axially pressed, the pushing part applies force to the inclined surface to enable the swing piece to swing around the pivot in the direction that the positioning teeth are separated from the positioning tooth grooves.

20. The clamping tool of claim 19, wherein: the oscillating piece has a blind hole (307) facing the second edge (107) of the elongated hole, the blind hole being internally provided with a second elastic element (308) providing said positioning elastic force, which is supported on and slidingly cooperates with the second edge of the elongated hole.

21. The clamping tool of claim 19, wherein: the shaft assembly (300) includes a rotation stop (309) positioned within the elongated aperture and configured to move along the elongated aperture, the rotation stop being received about and axially movable in engagement with the pivot shaft via a rotation stop aperture (310).

22. The clamping tool of claim 19, wherein: the pivot (302) is acted on by a third elastic element (311), which applies an elastic force to the pivot in a direction opposite to the direction in which the pivot is pressed axially.

23. A gripping tool according to any of claims 19 to 22, characterised in that: the second handle (200) has a first wall (202) and a second wall (203) with a gap (204) maintained therebetween; the part of the first handle, which is provided with the long hole, is positioned in a gap (204) between the first wall and the second wall and is laterally limited by the first wall and the second wall; the pivot (302) is rotatably assembled on the first wall (202) and the second wall (203) of the second handle, the pivot (302) comprises a shaft section (312), a first end cover (313) fixedly arranged at one end of the shaft section and a second end cover (314) assembled at the other end of the shaft section, and the first end cover and the second end cover are separately exposed on the outer side surface of the first wall and the outer side surface of the second wall; the pushing part is arranged on the shaft section.