CN219819387U - Clamping tool - Google Patents

Abstract

The utility model discloses a clamping tool, which belongs to a manual tool, wherein the clamping force of two clamping jaws clamped by the existing clamping tool on a workpiece is small, the type of the workpiece suitable for clamping by the tool is limited, at least one clamping element which can automatically adjust the gesture according to the shape of the workpiece when clamping the workpiece is arranged on at least one clamping jaw, the clamping element can automatically adjust the gesture according to the shape of the workpiece when clamping the workpiece by using the clamping tool to reliably clamp the workpiece, the clamping force of the two clamping jaws on the workpiece is large, and the clamping tool is suitable for clamping various types (shapes) of workpieces, thereby expanding the application range. The utility model also enables the positioning teeth to be separated from the positioning tooth grooves by axially pressing the shaft assembly to adjust the size of the clamping space between the first clamping jaw and the second clamping jaw so as to be suitable for clamping workpieces with different specifications.

Description

Clamping tool

Technical Field

The utility model belongs to a manual tool, and particularly relates to a clamping tool.

Background

Clamping tools, such as water pump pliers, generally have two clamping jaws, the clamping or release of a workpiece (object) being achieved by changing the relative positions of the two clamping jaws.

An included angle is usually present between the two jaws of the clamping tool, which has the following problems in use:

the shape of two clamping jaws is difficult to adapt to the shape of various workpieces, when clamping the workpieces, the two clamping jaws can extrude the workpieces to the opening directions of the two clamping jaws, so that the clamping force of the two clamping jaws on the workpieces is small, even the workpieces can slip when being extruded, and the types (shapes) of the workpieces suitable for clamping by the clamping tool are limited.

Existing clamping tools cannot be replaced after the clamping jaws (such as the biting teeth) are damaged, so that the whole tool is scrapped.

In addition, the existing clamping tool is inconvenient to adjust the clamping space between the two clamping jaws, and is inconvenient to operate when workpieces with different specifications are to be clamped.

Disclosure of Invention

The utility model aims to solve the technical problems and the technical task of the utility model to overcome the defects that two clamping jaws clamped by the existing clamping tool have small clamping force on a workpiece and the type of the workpiece suitable for clamping is limited, provide a clamping tool suitable for reliably clamping workpieces with various shapes, and improve the operation convenience of the clamping tool on the basis.

In order to achieve the above object, the clamping tool of the present utility model includes a first handle and a second handle rotatably connected together via a shaft assembly, a first clamping jaw is provided at a front end of the first handle, a second clamping jaw is provided at a 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 to bring the first clamping jaw and the second clamping jaw close to each other, and the first handle and the second handle are opened to bring the first clamping jaw and the second clamping jaw open to each other, characterized in that: at least one clamping jaw is provided with at least one clamping piece which can automatically adjust the gesture 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 piece automatically adjusts the gesture according to the shape of the workpiece so as to reliably clamp the workpiece, the clamping force of the two clamping jaws on the workpiece is large, the clamping tool is suitable for clamping various (shape) workpieces, and the application range is enlarged.

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

In one embodiment, a single clamp is provided on both the first jaw and the second jaw, and a single clamp on the first jaw is provided in pairs with a single clamp on the second jaw. Therefore, the clamping piece can clamp the workpiece from the opposite direction of the workpiece, and the reliability of clamping the workpiece is improved.

In one embodiment, to increase the ability and flexibility of the clamping members to self-adjust the posture of the clamping members according to the shape of the workpiece when clamping the workpiece, the clamping members of the first clamping jaw and the clamping members of the second clamping jaw are arranged in groups, and the clamping members of the first clamping jaw and the clamping members of the second clamping jaw are arranged in pairs.

Specifically, the clamping members in the group comprise a front-stage clamping member and at least two secondary clamping members which form the clamping assembly, the front-stage clamping member is assembled on the clamping jaw, the secondary clamping members are assembled on the front-stage clamping member, and when the workpiece is clamped, the front-stage clamping member and the secondary clamping members automatically adjust the postures according to the shape of the workpiece so as to reliably clamp the workpiece. The workpiece can be reliably clamped through the gesture adjustment of the front-stage clamping piece and the secondary clamping piece.

Further, to clamp the workpiece from multiple locations, a single clamp or a set of clamps includes at least one pair. Furthermore, at least one pair of individual clamping members or groups of clamping members is distributed in the depth direction of the clamping space.

For ease of assembly, in particular for ease of replacement of the clamps, the clamps are mounted with a pin shaft to swing around the pin shaft to adjust the attitude.

In order to enable a sufficiently large holding force to be applied to the workpiece by the holding member, the holding member is configured to slide along the circular arc surface to adjust the posture. The arc surface can provide a larger supporting surface for the clamping piece, and when the clamping piece applies enough clamping force to the workpiece, the clamping piece and the assembly connection structure of the clamping piece cannot be damaged.

In order to restrain the clamping piece at a sliding position along the arc surface and simplify the structure, a restraint hole is arranged concentrically with the arc surface, a rod piece is arranged in the restraint hole in a penetrating way, and the restraint hole or the rod piece is arranged on the clamping piece to restrain the clamping piece at the sliding position along the arc surface and guide the clamping piece to slide along the arc surface.

In order to make the constraint structure regular, the rod piece 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, the constraint hole is configured on a middle wall, and the middle wall is positioned in the gap.

In order to make the stress of the arc surface uniform, the arc surface 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.

In one embodiment, the clamping member is acted on by a first elastic element for keeping the clamping member in an initial state, so that the clamping member is reset to the initial state after the clamping member changes the posture due to clamping the workpiece.

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

In order to restrict the clamping piece in a reasonable posture adjustment range, the problem that the workpiece cannot be clamped due to overlarge amplitude when the clamping piece adjusts the posture is avoided, and a limiting part used for limiting the posture adjustment range of the clamping piece is arranged on the clamping piece.

In order to adjust the size of the clamping space to be suitable for clamping workpieces with different specifications, the first handle is provided with a long hole, and a positioning tooth slot is arranged at the first edge of the long hole; the shaft assembly rotates to be configured in the second handle and wears to locate the slot hole of first handle, and the shaft assembly has the location tooth, and the location tooth relies on location elasticity and the meshing of location tooth groove to fix the relative position of first handle and second handle with the shaft assembly location, and the centre gripping space at this moment can be confirmed, and axial pressing shaft assembly overcomes the location elasticity and makes the location tooth break away from the location tooth groove and makes the shaft assembly can follow the slot hole and remove the relative position that is used for adjusting first handle and second handle, adjusts the size of centre gripping space according to this.

For easy operation, the shaft assembly comprises a pivot and a swinging piece, wherein the pivot is configured to axially move, and a pushing part is arranged on the pivot; the swinging member is movably positioned in the long hole, the swinging member is sleeved on the pivot through the pivot hole and axially moves and cooperates with the pivot, the pivot hole is provided with an inclined plane facing the pushing part, the inclined plane leans against the pushing part by means of positioning elastic force, and the pushing part applies force to the inclined plane when the pivot is axially pressed to enable the swinging member to swing around the pivot in the direction that the positioning tooth is separated from the positioning tooth slot. Accordingly, the second handle is held by the hand, and the pivot is axially pressed by the fingers of the hand, so that the positioning teeth are separated from the positioning tooth grooves, and the shaft assembly can be moved in the long holes to adjust the size of the clamping space.

In order to make the positioning elastic force always exist when the shaft assembly moves along the long hole, the swinging piece is provided with a blind hole facing to the second edge of the long hole, and a second elastic element is arranged in the blind hole and provides the positioning elastic force, and the second elastic element is supported on the second edge of the long hole and is in sliding fit with the second edge of the long hole. Thus, the second elastic element is slidably pulled at the second edge of the elongated hole to provide a positioning elastic force when the shaft assembly moves along the elongated hole.

To ensure that the axial movement of the pivot shaft is converted into a wobble movement of the wobble member, the pivot shaft is prevented from rotating during the axial movement of the pivot shaft, for which purpose the shaft assembly comprises a rotation-stopping member which is located in the elongated hole and is arranged to move along the elongated hole, which rotation-stopping member is fitted over the pivot shaft via the rotation-stopping hole and is in axial movement engagement with the pivot shaft.

In order to reset the pivot after the pivot is axially pressed, a third elastic element acts on the pivot, and the direction of the elastic force exerted by the third elastic element on the pivot is opposite to the direction of the axial pressing of the pivot.

In order to ensure reliable assembly of the shaft assembly and stable, non-offset clamping force when clamping the workpiece by the first and second handles, the second handle has a first wall and a second wall, with a gap maintained therebetween; the part of the first handle, which is provided with the long hole, is positioned 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 comprises a shaft section, a first end cover fixedly arranged at one end of the shaft section and a second end cover 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.

According to the utility model, at least one clamping piece which can automatically adjust the gesture according to the shape of the workpiece when clamping the workpiece is arranged on at least one clamping jaw, so that the clamping piece can automatically adjust the gesture according to the shape of the workpiece when clamping the workpiece by the clamping tool, the workpiece can be reliably clamped, the clamping force of the two clamping jaws on the workpiece is large, and the clamping tool is suitable for clamping various types (shapes) of workpieces, and the application range is expanded.

The clamping piece is assembled on the clamping jaw, so that the clamping jaw cannot be damaged when clamping a workpiece; the clamping piece can be replaced after being damaged, so that the use cost of the clamping tool is saved.

The first handle is provided with a long hole, and the first edge of the long hole is provided with a positioning tooth slot; the shaft assembly is rotatably arranged on the second handle and penetrates through the long hole of the first handle, the shaft assembly is provided with positioning teeth, the positioning teeth are meshed with the positioning tooth grooves by means of positioning elastic force to position the shaft assembly to fix the relative positions 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 positions of the first handle and the second handle, and accordingly the size of the clamping space is adjusted to be suitable for clamping workpieces with different specifications.

Drawings

FIG. 1 is a schematic front view of embodiment 1 of the clamping tool of the present utility model;

FIG. 2 is an isometric view of the gripping tool of FIG. 1;

FIG. 3 is an exploded view of the clamping tool of FIGS. 1-2;

FIG. 4 is a schematic diagram of another view of the structure of FIG. 3;

FIG. 5 is a schematic view showing the assembly relationship of the shaft assembly of embodiment 1 of the present utility model and the elongated hole of the second shank;

FIG. 6 is a schematic diagram of another view of the structure of FIG. 5;

FIG. 7 is a left side view of the clamping tool of FIG. 1 with the first and second jaws closed to reduce the clamping space;

FIG. 8 is a cross-sectional view taken along the direction A-A of FIG. 7;

fig. 9 is an enlarged view of a portion a in fig. 8;

FIG. 10 is a cross-sectional view taken along the direction B-B of FIG. 9;

FIG. 11 is a schematic diagram showing the cooperation relationship between the pushing portion on the shaft section and the swinging member in embodiment 1;

FIG. 12 is a schematic front view of embodiment 2 of the clamping tool of the present utility model;

FIG. 13 is an isometric view of the gripping tool of FIG. 12;

FIG. 14 is a schematic front view of embodiment 3 of the clamping tool of the present utility model;

FIG. 15 is an isometric view of the gripping tool of FIG. 14;

FIG. 16 is a schematic view showing the assembly relationship between the front stage clamping member and the first clamping jaw in embodiment 3 of the clamping tool according to the present utility model;

FIG. 17 is an exploded view of the structure of FIG. 16;

FIG. 18 is a schematic front view of embodiment 4 of the clamping tool of the present utility model;

FIG. 19 is an exploded view of embodiment 5 of the clamping tool of the present utility model;

FIG. 20 is a schematic view of the other view of FIG. 19;

FIG. 21 is an exploded view of embodiment 6 of the clamping tool of the present utility model;

FIG. 22 is an exploded view of embodiment 7 of the clamping tool of the present utility model;

the reference numerals in the figures illustrate:

100 first handle: 101 first jaw, 102 restraining hole, 103 middle wall, 104 slot, 105 first edge, 106 positioning slot, 107 second edge, 108 mounting slot, 109 first V-shaped slot;

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

300 shaft assembly: 301 positioning teeth, 302 pivots, 303 swings, 304 pushes against, 305 pivot holes, 306 ramps, 307 blind holes, 308 second spring elements, 309 stops, 310 stops holes, 311 third spring elements, 312 shaft segments, 313 first end caps, 314 second end caps, 315 stops planes,

400 clamping spaces;

500 clamping pieces, 501 pin shafts, 502 snap teeth, 503 limiting parts, 504 first elastic elements, 505 triangular assembly parts and 506 clamping parts;

600 add and hold the subassembly: 601 front-stage clamping piece, 602 secondary clamping piece, 603 arc surface, 604 rod piece, 605 first side wall, 606 second side wall, 607 gap.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

The terms "comprises" and "comprising" and any variations thereof, in the description and claims, are intended to cover a non-exclusive inclusion, such as a method or article, that comprises a list of features does not necessarily limit the features to those expressly listed, but may include other features not expressly listed that may be included in such method or article.

In the description of the present utility model, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "both sides", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Wherein, the directions of the upper and the lower and the left and the right are opposite, and the two sides comprise the left and the right, and the outer refers to the surface of the product facing away from the center of the product.

In the description of the present utility model, it should be understood that the technical features defined by the terms "first", "second", etc. having sequential concepts are merely for the purpose of clearly describing the defined technical features, so that the defined technical features can be clearly distinguished from other technical features, and are not so named as to represent actual implementation, and thus should not be construed as limiting the present utility model.

The present utility model will be described in detail with reference to specific embodiments and drawings.

Example 1

As shown in fig. 1-11, the holding tool is a water pump clamp. Which includes a first handle 100 and a second handle 200 rotatably coupled together via a shaft assembly 300. The front end of the first handle is provided with a first clamping jaw 101. The front end of the second handle is provided with a second clamping jaw 201. A clamping space 400 is maintained between the first jaw 101 and the second jaw 201. The first handle and the second handle are held to enable the first clamping jaw and the second clamping jaw to be close to each other so as to clamp a workpiece positioned in the clamping space, and the first handle and the second handle are opened to enable the first clamping jaw and the second clamping jaw to be open to each other so as to loosen the workpiece or clamp the workpiece.

The first handle 100 has a slot 104, a first edge 105 of the slot 104 defining a detent 106, and a second edge 107 of the slot being planar.

The second handle 200 has a first wall 201 and a second wall 203 with a gap 204 maintained therebetween. The outside of the first wall is provided with a first circular groove 205, the bottom of the first circular groove is provided with a first shaft hole 206, the main body of the first shaft hole is a round hole for being in rotary fit with a shaft section described below and supporting the shaft section, and the first shaft hole is provided with a notch 207 for allowing the pushing part to pass through when the shaft section is assembled. The outer side of the second wall 203 is provided with a second circular groove 208, and the bottom of the second circular groove is provided with a second shaft hole 209, which is a circular hole for being in rotary fit with a shaft section described below and supporting the shaft section. The first shaft hole and the second shaft hole are positioned on the same axis.

The shaft assembly 300 includes a pivot 302, a swing 303, and a rotation stop 309. The pintle 302 includes a shaft section 312, a first end cap 313 secured to one end of the shaft section, and a second end cap 314 mounted to the other end of the shaft section. The shaft section 312 is a circular shaft with a rotation stopping plane 315. A pin is fixed to the shaft section 312 as the pushing portion 304. The width of the swinging member 303 is slightly smaller than the width of the long hole 104, and a pivot hole 305 having a slope 306 facing the pushing portion is provided on the swinging member 303. The oscillating member is provided with positioning teeth 301 towards the first edge 105 and blind holes 307 towards the second edge 107. The rotation stopping member 309 is a plate member, and a semi-cylindrical rotation stopping hole 310 is formed on the plate member, and the width of the rotation stopping member is equal to that of the long hole. The rotation stopping piece can move along the long hole and can not rotate in the long hole when being positioned in the long hole. The shaft segment cooperates with the semi-cylindrical rotation-stopping hole 310 via the rotation-stopping plane to limit the rotation of the shaft segment.

The portion of the first handle 100 with the elongated hole 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 rotation stopping member 309 are positioned in parallel in the long hole and are also limited by the first wall and the second wall laterally so as not to be out of the long hole. The blind hole 307 houses a second resilient element 308 which is a helical compression spring and which is supported between the second edge 107 of the elongate hole and the oscillating member 303 to provide a positioning spring force to the oscillating member. The second resilient element is in sliding engagement with the second edge 107 of the slot. The shaft section 312 is sleeved with a third elastic element, which is also a helical compression spring. The shaft section 312 passes through the first shaft bore 206, the pivot bore 305, the anti-rotation bore 310, the second shaft bore 209 in sequence before being connected to the second end cap 314. The first end cap 313 is positioned within the first circular groove 205 and exposed on the outer side of the first wall, and the second end cap 314 is positioned within the second circular groove 208 and exposed on the outer side of the second wall. The third elastic element 311 is compressed between the first wall 202 and the first end cap 313. The third elastic element applies elastic force to the pivot in the opposite direction to the direction of axially pressing the pivot. In view of the foregoing, the shaft section 312 is in rotational engagement with the first shaft bore 206 and the second shaft bore 209, and the pivot shaft 312 is rotatably mounted to the first and second walls of the second handle, the shaft assembly being rotatably disposed with the second handle, the pivot shaft being axially movable. The shaft assembly is arranged in the long hole of the first handle in a penetrating mode, the swinging piece is sleeved on the pivot through the pivot hole and is matched with the pivot in an axial moving mode, and the rotation stopping piece is sleeved on the pivot through the rotation stopping hole and is matched with the pivot in an axial moving mode.

The positioning teeth 301 engage with the positioning tooth slots 106 by means of positioning spring force to position the shaft assembly to fix the relative positions of the first and second handles, and the inclined surface 306 is abutted against the pushing portion by means of positioning spring force. As shown in fig. 10, the first end cover 313 is pressed axially leftwards, so that the shaft section 312 moves axially relative to the first handle 100, the second handle 200, the swinging member 303 and the rotation stopping member 309 against the positioning elastic force, the pushing portion 304 applies force to the inclined surface 306 to enable the swinging member to swing around the shaft section 312 in a direction (anticlockwise direction shown in fig. 9) in which the positioning teeth are separated from the positioning tooth grooves, and the swinging member 303 and the rotation stopping member 309 can move along the long holes, that is, the shaft assembly can move along the long holes so as to adjust the relative positions of the first handle and the second handle. The axial pressing of the pivot is removed, the pivot is reset to the state shown in fig. 9-10 under the action of the elastic force applied to the pivot by the third elastic element, and the swinging element is reset to the state shown in fig. 9-10 under the action of the elastic force of the second elastic element.

In this embodiment, the positioning tooth groove 106 is upward and the positioning tooth 301 is downward, so that when the pivot is not pressed, the shaft assembly can be moved upward along the long hole, and the positioning tooth is pushed by the positioning tooth groove to swing the swinging member. The clicking sound is produced when the positioning teeth slide one by one through the positioning tooth slots. On the contrary, because the shaft assembly cannot move downwards along the long hole when the pivot is not pressed due to the limitation of the directions of the positioning tooth slot and the positioning tooth, the positioning tooth is meshed with the positioning tooth slot by means of positioning elastic force, the shaft assembly is positioned to fix the relative position of the first handle and the second handle, the positioning tooth is prevented from slipping from the positioning tooth slot when the workpiece is clamped, and the clamping force can be applied to the workpiece by the first clamping jaw and the second clamping jaw by holding the first handle and the second handle.

In this embodiment, the clamping members 500 are disposed on both the first clamping jaw and the second clamping jaw to automatically 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 the first clamping jaw and the second clamping jaw through the pin 501 to swing around the pin to adjust the posture. The clamping piece on the first clamping jaw and the clamping piece on the second clamping jaw are arranged in pairs. Also, two pairs of individual clamps are distributed in the depth direction of the clamping space 400. In this embodiment, as shown in fig. 2, the clamping portion of the clamping member is a plane, the clamping portion is provided with engaging teeth 502, the clamping member is square, and the end of the clamping member is provided with a limiting portion 503 for limiting the posture adjustment range of the clamping member. Further, as shown in fig. 8, a first V-shaped groove 109 is provided on the first clamping jaw, and a second V-shaped groove 210 is provided on the second clamping jaw to provide a movable space for the swinging 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 according to the shape of the workpiece from the posture adjustment to reliably clamp the workpiece, the swinging of the clamping member around the pin shaft can adapt to the shape of the clamped workpiece in the depth direction and the width direction (see fig. 21) of the clamping space, thereby reliably clamping the workpiece, the clamping force of the two clamping jaws to the workpiece is large, the clamping tool is suitable for clamping workpieces of various types (shapes), and the application range is enlarged.

Example 2

As shown in fig. 12-13, the holding tool is also a pump clamp. It differs from embodiment 1 only in the shape of the clamping member. In this embodiment, the clip 500 is semi-cylindrical. The other structures are the same as those of embodiment 1, and will not be described again.

Example 3

As shown in fig. 14-17, the clamping tool is used to clamp irregularly shaped workpieces. It differs from embodiment 1 only in the grip configuration. In this embodiment, the first clamping jaw and the second clamping jaw are configured as a group of clamping members, the group of clamping members comprises a front clamping member 601 and two secondary clamping members 602 which form a clamping assembly, the front clamping member is assembled with the first clamping jaw 101 and the second clamping jaw 201, and the secondary clamping member 602 is assembled with the front clamping member 601. Moreover, the clamping assembly on the first clamping jaw and the clamping assembly on the second clamping jaw are configured in pairs.

Also, in this embodiment, the front stage grip 601 and the two secondary grips 602 are each configured to slide along the circular arc surface 603 to adjust the posture. The restraining hole 102 is arranged concentrically with the circular arc surface, and the rod 604 is penetrated in the restraining hole 102, so that the clamping piece is restrained at a position sliding along the circular arc surface and is guided to slide along the circular arc surface.

In this embodiment, as shown in fig. 16-17, taking the assembly of the front clamping member 601 and the first clamping jaw 101 as an example, the front 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 wall and the second side wall. The first jaw 101 has a central wall 103, the restraint aperture 102 being disposed in the central wall 103, the central wall 103 being disposed within the slit 607. The circular arc surface 603 is provided on the circumferential surfaces of the first side wall and the second side wall, and on both side portions of the middle wall corresponding to the circumferential surfaces.

The assembly mode of the front-stage clamping piece and the second clamping jaw is the same as the assembly mode of the front-stage clamping piece and the first clamping jaw.

Also, in this embodiment, the primary and secondary clamps are crescent shaped.

The clamping tool of the embodiment can automatically adjust the postures of the front-stage clamping piece and the secondary clamping piece according to the shape of the workpiece when clamping the workpiece so as to reliably clamp the workpiece. The sliding of the front-stage clamping member and the secondary clamping member along the circular arc surface brings the clamping members to adapt to the shape of the clamped workpiece in the depth direction and the width direction (see fig. 21) of the clamping space, so that the workpiece can be reliably clamped, and the workpiece with an irregular shape can be reliably clamped.

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

Example 4

As shown in fig. 18, the gripping tool differs from embodiment 1 only in the grip configuration. In this embodiment, the clamping member 500 has a cylindrical shape, and its clamping portion has an outer convex surface. The other structures are the same as those of embodiment 1, and will not be described again.

In this embodiment, the contact relation between the clamping member and the workpiece to be clamped is adjusted by rotating the clamping member, so that the clamping member adapts to the shape of the workpiece to be clamped in the depth direction and the width direction (see fig. 21) of the clamping space based on the shape of the clamping member, and the workpiece is guided to be in a proper position, thereby reliably clamping the workpiece, and ensuring that the clamping force of the clamping member on the workpiece is not deviated or inclined.

Example 5

As shown in fig. 19-20, the clamping tool differs from embodiment 1 in the mounting relationship and arrangement of the clamping member and the clamping jaw. In this embodiment, the first clamping jaw 101 and the second clamping jaw 201 each have a fitting groove 108, the clamping members 500 each have a triangular fitting portion 505, which extends into the fitting groove and is swingably fitted to the first clamping jaw and the second clamping jaw by means of a pin 501, and the clamping members are acted on with a first elastic member 504 for maintaining the clamping members in an initial state. The initial state is a state that the clamping piece depends on the clamping jaw by means of the elastic force of the first elastic element. In this embodiment, the first elastic element 504 is a linear spring wire that is wound around a pin and supported at both ends on the corresponding jaw and clamp, respectively. Therefore, after the workpiece clamping device is used, when the clamping piece changes in posture due to workpiece clamping, the workpiece clamping device can be reset to an initial state depending on the elastic force of the first elastic element, and the workpiece clamping device is convenient for subsequent use. The other structures can be the same as those of embodiment 1, and will not be described again.

Example 6

As shown in fig. 21, the gripping tool differs from embodiment 5 only in the gripping portion of the gripping member, in which the gripping portion 506 is a V-shaped surface, which is an inward concave surface, and which extends in the depth direction of the gripping space, i.e., in the direction perpendicular to the axis of the pin. The surface of the V-shaped surface can be provided with bulges or ladder structures which are arranged at intervals, and when the clamping action is executed, the bulges or ladder structures can be clamped on the surfaces of workpieces in different shapes by finely adjusting the positions of the clamping tools, so that the auxiliary clamping tools can reliably clamp the workpieces. In this embodiment, since the holding member has a swing around the pin and the V-shaped surface has a certain width, the holding member can be adapted to the shape of the workpiece to be held in the depth direction, width direction and lateral direction (see fig. 21) of the holding space, thereby reliably holding the workpiece. The other structures are the same as those of embodiment 1, and will not be described again.

According to this embodiment, in other embodiments the V-shaped surface may extend sideways of the clamping space, i.e. the direction of extension of the V-shaped surface is parallel to the axis of the pin.

Example 7

As shown in fig. 22, the gripping tool differs from embodiment 1 in the shape of the gripping member and its fitting relationship with the gripping jaw. In this embodiment, the first clamping jaw 101 and the second clamping jaw 201 have opposite planes, and the clamping member 500 is spherical and fixed on the plane of the corresponding clamping jaw by welding or the like, and the clamping portion is an outer convex surface. When clamping the workpiece, the spherical surface of the clamping piece can guide the workpiece to adjust the posture, and guide the workpiece to be in a proper position, so that the clamping force of the clamping piece on the workpiece is not deviated or inclined. Moreover, the spherical surface does not damage the surface of the workpiece. In this embodiment, the clamping members on the same clamping jaw adapt to the shape of the workpiece to be clamped in the depth direction and lateral direction (see fig. 21) of the clamping space due to their own shape, whereby the workpiece is reliably clamped.

The other structures are the same as those of embodiment 1, and will not be described again.

According to this embodiment, in other embodiments, the clamping member is rotatable about an axis perpendicular to the jaw plane.

In addition to the foregoing embodiments, in other embodiments, the clamping portion of the clamping member may be concave or convex, such as semi-cylindrical, hemispherical, spherical, etc.

In the foregoing embodiments, the distinguishing structure between each embodiment and the other embodiments may be applied to the other embodiments without mutual rejection in the light of the present disclosure.

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.