CN115847143A - Automatic bar positioning and clamping device - Google Patents

Abstract

The invention discloses an automatic bar positioning and clamping device which comprises a base, wherein a driving cylinder is arranged on the base, a box body is arranged on the base at the extending end of a piston rod of the driving cylinder, a box cover is arranged at the upper part of the box body, a clamping component for clamping a bar is arranged at the open structure side of the box body, the clamping component comprises a power push rod, and wedge-shaped force application parts are arranged at two sides of the power push rod in the box body; the novel electric hand-operated tool is characterized in that two symmetrical hand grips with the same structure and arc structures are arranged on two sides of the power push rod, the hand grips extend out of the box body, the hand grips are mounted on the box body through pin shafts in the box body, the other end of the power push rod extends out of the box body and is connected with a piston rod of a driving cylinder through a coupling, the driving cylinder is fixedly mounted on a base, and a reset spring is mounted on the outer side of the hand grips in the box body. The invention has the advantages of simplicity, flexibility, easy application to various devices, wide practicability, capability of realizing automatic centering and clamping of workpieces, and firm and stable clamping of the workpieces.

Description

Automatic bar positioning and clamping device

Technical Field

The invention belongs to the technical field of clamp design, and particularly relates to an automatic bar positioning and clamping device.

Background

The workpiece needs to be fixed on an equipment workbench before the traditional equipment part is machined, a common fixing method is that an auxiliary clamp is arranged on the equipment, the part to be machined is clamped by the auxiliary clamp arranged on the equipment, the traditional flat tongs which are mainly used by a machine are arranged on the auxiliary clamp arranged on the equipment, and the traditional flat tongs work mode is as follows: the screw rod 1.4 is driven to rotate by rotating the tightening and loosening handle 1.5, the movable jaw 1.3 on the bottom plate 1.1 is pulled to move, and the fixed jaw 1.2 is fixed, so that a workpiece between the two jaws is clamped, but the workpiece can slide up and down or rotate due to the fact that the clamping surface of the cylindrical bar is too small. It can be seen that the bayonet of the flat-nose pliers for the machine is a plane, so that the cylindrical bar can be clamped very difficultly, the limitation of two-way movement freedom degree can be realized, one direction can not be limited, if the processing is carried out under the condition of overlarge processing cutting force or large feeding amount in the processing process of a cutter, a part can slide, the processing is not facilitated, and the potential safety hazard is easy to occur. Another clamping method of the traditional equipment is to fix a workpiece by using a complete set of pressing plates, but the bar parts are relatively difficult to compress by using the pressing plates, and the processing is inconvenient due to the compression by using the pressing plates. In order to solve the problems, a novel automatic bar material mounting, centering processing, clamping and clamping device is necessary, and therefore the invention provides an automatic bar material positioning and clamping device.

Disclosure of Invention

Aiming at the problems in the prior art, the invention provides the automatic bar positioning and clamping device which is simple in structure, reasonable in design, firm and stable in workpiece clamping, safe in machining process and capable of preventing parts from sliding and reducing the labor intensity of operators.

The invention is realized in such a way that the automatic bar positioning and clamping device comprises a base, wherein a driving cylinder is arranged on the base, a box body is arranged on the base at the extending end of a piston rod of the driving cylinder, the box body is of an open structure in the extending direction of the piston rod, a box cover is arranged at the upper part of the box body, a clamping component for clamping a bar is arranged at the open structure side of the box body, the clamping component comprises a power push rod, and wedge-shaped force application parts are arranged at two sides of the power push rod in the box body; the novel electric hand-operated tool is characterized in that two symmetrical hand grips with the same structure and arc structures are arranged on two sides of the power push rod, the hand grips extend out of the box body, the hand grips are mounted on the box body through pin shafts in the box body, the other end of the power push rod extends out of the box body and is connected with a piston rod of a driving cylinder through a coupling, the driving cylinder is fixedly mounted on a base, and a reset spring is mounted on the outer side of the hand grips in the box body.

Preferably, the two sides of the box body, which are close to the driving cylinder side, are provided with first guide blocks.

Preferably, a centering extension part is further arranged on the power push rod on the hand grip side, and a first centering roller is mounted at the end part of the centering extension part; the outer end parts of the two grippers are respectively provided with a second centering roller.

Preferably, the box body is provided with second guide blocks at two sides of the centering extension part.

Preferably, a driving wheel matched with the wedge-shaped surface on the outer side of the wedge-shaped force application part of the power push rod is arranged at the end part of the hand grip in the box body.

Preferably, the box body is fixedly connected with the base through an L-shaped support.

Preferably, the cross section of the power push rod is of a rectangular structure.

The invention has the advantages and technical effects that: the automatic positioning and clamping device is simple and flexible, is easy to use on various equipment, has wide practicability, can realize automatic centering and clamping of a workpiece, and is firm and stable in clamping of the workpiece. The structure is a reasonable clamp in the aspect of solving the problems that the roundness error is relatively large, the clamping is relatively difficult during processing, the clamping force of the bar is easy to be uneven, and the automatic centering and alignment are easy to realize.

Drawings

FIG. 1 is a front view of the present invention;

FIG. 2 is a top view of FIG. 1;

FIG. 3 is a bottom view of FIG. 1;

FIGS. 4 and 5 are schematic perspective views of the present invention;

fig. 6 is a schematic view of the inner structure of the box cover.

In the figure, 1, a base; 2. a drive cylinder; 3. a box body; 4. a box cover; 5. a clamping assembly; 5-1, a power push rod; 5-10, wedge-shaped force application part; 5-2, a gripper; 5-3, a pin shaft; 5-4, a coupling; 5-5, a return spring; 5-6, a first guide block; 5-7, centering the extension; 5-8, a first centering roller; 5-9, a second centering roller; 5-10 parts of a second guide block; 5-11, driving wheels; 6. an L-shaped bracket.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to fig. 1 to 6, an automatic bar positioning and clamping device comprises a base 1, wherein the base is of a plate type structure and provides a mounting position and a mounting position for external equipment, a driving cylinder 2 is mounted on the base, a box body 3 is mounted at the extending end of a piston rod of the driving cylinder on the base, the box body is of an open type structure in the extending direction of the piston rod, a box cover 4 is mounted at the upper part of the box body, a clamping assembly 5 for clamping a bar is mounted at the side of the open type structure of the box body, the clamping assembly 5 comprises a power push rod 5-1, and wedge-shaped force application parts 5-10 are arranged at two sides of the power push rod in the box body; two grips 5-2 with the same structure and arc structures are symmetrically arranged on two sides of the power push rod, the grips extend out of the box body, the grips are mounted on the box body through pin shafts 5-3 in the box body, the other end of the power push rod extends out of the box body and is connected with a piston rod of a driving cylinder through a coupling 5-4, the driving cylinder 2 is fixedly mounted on the base 1, and a return spring 5-5 is mounted on the outer side of each grip in the box body.

The bottom plate in the structure mainly provides mounting positions for the driving cylinder 2 and the box body 3 and mounting positions for external equipment; the driving cylinder mainly provides common power for the grippers 5-2, the piston rod extends out, the three grippers grip the cylindrical bar, the piston rod contracts, and the three grippers release the cylindrical bar; the box body is mainly formed by welding plates, the box cover is arranged on the box body in a detachable mode through fasteners, the purpose is to install and replace the internal components of the box body, the box body mainly provides installation positions for the power push rod and the hand grip, and meanwhile, the box body provides guiding and positioning functions for the power push rod; the wedge-shaped force application parts 5-10 on the two sides of the power push rod 5-1 are mainly used for pushing the other two grippers to grip and loosen, and the connecting side of the power push rod and the piston rod is of a rectangular structure, so that the power push rod is prevented from rotating and is matched with the square hole of the box body to play a role in guiding. The pin shaft 5-3 is mainly used for fixing the hand grip on the box body, and meanwhile, the hand grip can rotate around the pin shaft; the gripper 5-2 with the arc-shaped structure has the main functions of positioning and clamping the bar, automatically positioning and clamping the bar by driving the clamping assembly through the extension of the piston rod of the driving cylinder, contracting the piston rod of the driving cylinder, expanding and resetting the gripper under the action of the reset spring 5-5, and automatically releasing the bar.

The above structure can also adopt the following technical scheme:

preferably, the two sides of the box body, which are close to the driving cylinder side, are provided with the first guide blocks 5-6, and the first guide blocks are added on the basis of automatic guiding of the box body, so that the power push rod is prevented from deforming while linear motion is ensured, and the running stability of the invention is improved.

Preferably, a centering extension part 5-7 is further arranged on the power push rod on the hand grip side, and a first centering roller 5-8 is mounted at the end part of the centering extension part; the outer ends of the two grippers are respectively provided with a second centering roller 5-9. The first centering roller and the two second centering rollers play a role in centering the bar when being used for clamping the bar, and simultaneously scratch on the surface of the bar is reduced.

Preferably, the two sides of the centering extension part on the box body are provided with second guide blocks 5-10, so that the centering extension part is prevented from deforming while the power push rod moves forwards in a straight line, and the running stability of the centering device is further improved under the condition that the centering extension part and the first guide blocks exist simultaneously.

Preferably, the end part of the hand grip in the box body is provided with driving wheels 5-11 matched with the wedge-shaped surface on the outer side of the wedge-shaped force application part of the power push rod, so that the friction resistance is reduced, and the noise is reduced.

Preferably, the box body is fixedly connected with the base through an L-shaped support 6, the L-shaped support is formed by bending a steel plate and is mainly connected with the bottom plate and the box body, so that the overall height of the box body can be reduced, the space is saved, and the overall weight of the box body is reduced.

According to the working principle of the automatic positioning and clamping device, the power push rod is pushed by the extension of the piston rod of the driving cylinder, the power push rod moves to drive the two grippers to rotate, the second centering roller on the grippers and the second centering roller on the power push rod are firstly contacted with a bar material in the process that the piston rod of the driving cylinder extends to a certain position, the bar material is positioned by using the three centering rollers, the bar material is clamped after the positioning is finished, and then the bar material moves to the specified position under the action of an external power source, so that the automatic positioning and clamping operation of the bar material is finished. Because the centering roller is adopted in the automatic positioning and clamping process of the bar, the bar is stressed more uniformly, the clamping is more reliable and stable, and the defect that the individual degree of freedom of the transmission clamp cannot be positioned in a single direction is avoided. The novel automatic positioning and clamping device is free and convenient to clamp, can more easily realize the automation of workpiece clamping, and has wide market application prospect.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims (7)

1. The utility model provides a bar automatic positioning clamping device which characterized in that: the device comprises a base, wherein a driving cylinder is arranged on the base, a box body is arranged on the base at the extending end of a piston rod of the driving cylinder, the box body is of an open structure in the extending direction of the piston rod, a box cover is arranged at the upper part of the box body, a clamping component for clamping a bar is arranged on the open structure side of the box body, the clamping component comprises a power push rod, and wedge-shaped force application parts are arranged on two sides of the power push rod in the box body; the novel electric hand-operated tool is characterized in that two symmetrical hand grips with the same structure and arc structures are arranged on two sides of the power push rod, the hand grips extend out of the box body, the hand grips are mounted on the box body through pin shafts in the box body, the other end of the power push rod extends out of the box body and is connected with a piston rod of a driving cylinder through a coupling, the driving cylinder is fixedly mounted on a base, and a reset spring is mounted on the outer side of the hand grips in the box body.

2. The automatic bar positioning and clamping device of claim 1, wherein: and first guide blocks are arranged on two sides of the box body, which are close to the driving cylinder side, and two sides of the power push rod are provided with first guide blocks.

3. The automatic bar positioning and clamping device of claim 1, wherein: a centering extension part is further arranged on the power push rod on the hand grip side, and a first centering roller is mounted at the end part of the centering extension part; the outer end parts of the two grippers are respectively provided with a second centering roller.

4. The automatic bar positioning and clamping device of claim 1, wherein: and second guide blocks are arranged on two sides of the centering extension part on the box body.

5. The automatic bar positioning and clamping device of claim 1, wherein: and a driving wheel matched with the wedge-shaped surface on the outer side of the wedge-shaped force application part of the power push rod is arranged at the end part of the hand grip in the box body.

6. The automatic bar positioning and clamping device of claim 1, wherein: the box body is fixedly connected with the base through an L-shaped support.

7. The automatic bar positioning and clamping device of claim 1, wherein: the section of the power push rod is of a rectangular structure.

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