CN212470644U

CN212470644U - Centering clamping device

Info

Publication number: CN212470644U
Application number: CN202020645917.8U
Authority: CN
Inventors: 李月梅; 苗军; 苗榕容
Original assignee: Jilin Zhongxiang Electronic Technology Engineering Co ltd
Current assignee: Jilin Zhongxiang Electronic Technology Engineering Co ltd
Priority date: 2020-04-26
Filing date: 2020-04-26
Publication date: 2021-02-05
Anticipated expiration: 2030-04-26

Abstract

The utility model discloses a centering clamping device, belonging to the technical field of tool fixtures and used for solving the technical problems of serious abrasion between moving parts, low service life and high maintenance cost when the clamping device in the prior art is used; the utility model is provided with a base, the top end of which is symmetrically and slidably connected with a clamping pliers; the clamping lever is rotationally connected to the lower part of the clamping pincers, the middle part of the clamping lever is rotationally connected with the base, and a rolling body is arranged at the end, far away from the clamping pincers, of the clamping lever; sliding connection on the base and drive press from both sides the pull rod that tight lever swing made the centre gripping pincers clamp work piece, the clamp plate with the rolling element contact is installed to pull rod one end to and connect the elastic component between base and the tight lever of clamp, press from both sides tight lever through the elastic component drive and reset and make the centre gripping pincers release the work piece, the utility model discloses have the fault rate low, long service life, maintain the beneficial effect that cost of maintenance is low.

Description

Centering clamping device

Technical Field

The utility model relates to a frock clamp technical field especially relates to a centering clamping device.

Background

Shaft parts with multiple specifications are usually only slightly changed in diameter and length, machining efficiency can be greatly improved by adopting a drum wheel type machine tool for machining, but a drum wheel clamp of the existing drum wheel type machine tool is large in size and large in occupied space, and cannot adapt to machining of the shaft parts with multiple specifications;

the prior art discloses a chinese utility model patent, which is filed on 2013, 11/05.8. 201320692883.8.No. CN203579227U, and comprises a hydraulic driving device and a self-centering clamping device, wherein two clamping jaws of the self-centering clamping device are driven by clamping levers to slide relatively, clamp and release a workpiece, the two clamping levers are symmetrically installed on a mounting seat through rotating shafts, one end of each clamping lever is in driving fit with the clamping jaws on the same side, a slotted hole is formed in the other swinging end of each clamping lever, a cylindrical pin simultaneously passes through the slotted holes of the two clamping levers, a tensioning rod is installed on the mounting seat, one end of the tensioning rod is connected with a cylindrical pin, and the other end of the tensioning rod is connected with the hydraulic driving device;

this when from centering anchor clamps centre gripping work piece, the piston rod of hydro-cylinder passes through right angle lever and promotes the straining rod and move down, and the straining rod drives through the cylindric lock and presss from both sides tight lever and swing simultaneously to drive two centre gripping pincers simultaneously inwards move in opposite directions, and the centre gripping pincers are from centering through V type structure and are step up the work piece, release the work piece: a piston rod of the oil cylinder pushes the tension rod to move upwards through the right-angle lever, and the tension rod drives the clamping lever to swing simultaneously through the cylindrical pin, so that the two clamping pincers are driven to move outwards and oppositely to release the workpiece simultaneously;

although the self-centering clamp can obtain enough clamping force to clamp a workpiece through hydraulic clamping, has relatively small structural dimension and low noise, and is very suitable for processing shaft parts with multiple specifications, when in use, the cylindrical pin and the slotted hole of the clamping lever are seriously abraded, the service life is short, and the maintenance cost is high.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming the defect that prior art exists, providing a centering clamping device that the fault rate is low, long service life, maintenance cost is low.

In order to achieve the above object, the present invention provides the following technical solutions:

the utility model discloses a centering clamping device, include:

the top end of the base is symmetrically and slidably connected with a clamping clamp;

the clamping lever is rotatably connected to the lower part of the clamping pliers, the middle part of the clamping lever is rotatably connected with the base, and the end, far away from the clamping pliers, of the clamping lever is provided with a rolling body;

a pull rod which is connected on the base in a sliding way and drives the clamping lever to swing so as to enable the clamping clamp to clamp the workpiece, wherein one end of the pull rod is provided with a pressure plate which is contacted with the rolling body, and

and the elastic component is connected between the base and the clamping lever, and drives the clamping lever to reset through the elastic component so that the clamping pliers release the workpiece.

Further, the clamping lever is of an L-shaped structure;

one end of the clamping lever is rotationally connected with the clamping pincers, the rolling body is installed at the other end of the clamping lever, and the clamping lever is located at the L-shaped inflection point and is rotationally connected with the base.

Furthermore, the rolling body is of a cylindrical structure, and two ends of the rolling body are rotatably connected with the clamping lever through bearings;

or the rolling body comprises a fixed shaft and a travelling wheel rotationally connected to the fixed shaft;

and two ends of the fixed shaft are fixedly connected with the clamping lever.

Further, the pull rod is vertically and slidably connected to the middle of the base;

one end of the pull rod is fixedly connected with the pressing plate, and protruding parts are formed at two ends of the pressing plate and used for blocking the rolling body from being separated from the pressing plate;

the other end of the pull rod is fixedly connected with a piston rod of the air cylinder, and the air cylinder provides driving force for the pull rod.

Further, the convex portion extends in the height direction toward the rolling member side.

Further, the elastic component is a compression spring.

Furthermore, the base is positioned on two sides of the pull rod and is provided with an accommodating cavity of which the axis is parallel to the axis of the pull rod;

the containing cavity is connected with a mandril in a sliding way;

the compression spring is arranged in the accommodating cavity, and the ejector rod is pushed by the compression spring to extend out of the base and contact with the clamping lever, so that the clamping lever drives the clamping pincers to be far away from the workpiece.

Furthermore, the contact end of the ejector rod and the clamping lever is provided with a roller which is in rolling contact with the clamping lever through the roller.

Further, the elastic component is an extension spring;

one end of the extension spring is connected with the clamping lever, and the other end of the extension spring is connected with the base.

Further, the elastic component is a torsion spring;

one tail end of the torsion spring is in contact with the clamping lever, the other tail end of the torsion spring is in contact with the base, and the torsion spring pushes the clamping lever to drive the clamping pincers to be far away from the workpiece in a fan-shaped expansion mode.

In the technical scheme, the utility model provides a pair of centering clamping device, beneficial effect:

1. the utility model relates to a clamping lever, clamping lever install the rolling element, through the clamp plate contact of rolling element and pull rod, convert sliding friction into rolling friction, avoid clamping lever and pull rod between the surface because sliding contact produces wearing and tearing, prolonged this clamping device life, reduce the fault rate, and then reduce maintenance, cost of maintenance to and reduce equipment shut down number, improve production efficiency;

2. the utility model discloses an still install elastomeric element on the base, elastomeric element with press from both sides tight lever contact and support press from both sides tight lever and reset, make press from both sides tight lever drive centre gripping pincers towards keeping away from the work piece direction slip, and then release the work piece, through elastomeric element, the rolling element that is favorable to pressing from both sides tight lever contacts with the clamp plate all the time, clamp plate and rolling element production striking sound when avoiding the cylinder action are favorable to falling and fall the noise.

3. The utility model discloses a bellying has been laid to the clamp plate both sides, blocks the rolling element through the bellying and breaks away from the clamp plate, has improved this clamping device reliability.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present invention, and other drawings can be obtained by those skilled in the art according to these drawings.

Fig. 1 is a front view of a first embodiment of a centering and clamping device disclosed in the present invention;

fig. 2 is a schematic structural view of a clamping lever of the centering and clamping device disclosed by the invention;

fig. 3 is a schematic structural view of a pressing plate of a centering and clamping device disclosed by the invention;

fig. 4 is a front view of a second embodiment of a centering and clamping device disclosed in the present invention;

fig. 5 is a front view of a third embodiment of the centering and clamping device disclosed in the present invention.

Description of reference numerals:

a base 1; a holding clamp 2; a clamping lever 3; a pull rod 4; a cylinder 5; an elastic component 6 and a mandril 7; a roller 8; a workpiece 9;

a rolling body 301;

a platen 401; a raised portion 402.

Detailed Description

In order to make the technical solution of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings.

As shown in fig. 1;

the first embodiment;

the utility model relates to a centering clamping device, include:

the top end of the base 1 is symmetrically connected with clamping pincers 2 in a sliding manner;

the clamping lever 3 is rotatably connected to the lower portion of the clamping pliers 2, the middle portion of the clamping lever 3 is rotatably connected with the base 1, and a rolling body 301 is arranged at the end, far away from the clamping pliers 2, of the clamping lever 3;

a pull rod 4 slidably connected to the base 1 and driving the clamp lever 3 to swing to clamp the workpiece 9 by the clamp 2, a pressing plate 401 contacting with the rolling body 301 and mounted at one end of the pull rod 4, and

and an elastic component 6 connected between the base 1 and the clamping lever 3, wherein the elastic component 6 drives the clamping lever 3 to reset so that the clamping pliers 2 releases the workpiece 9.

Specifically, the top end of the base 1 is symmetrically connected with two clamping pincers 2 in a sliding mode through a slideway, one opposite sides of the two clamping pincers 2 are provided with V-shaped grooves, and when the two clamping pincers 2 move relatively, the shaft parts are clamped in a self-centering mode through the V-shaped grooves;

the base 1 is positioned at the lower part of the clamping pincers 2 and symmetrically and rotatably connected with clamping levers 3, the base 1 is positioned between the two clamping levers 3 and vertically and slidably connected with a pull rod 4, the top end of the pull rod 4 is provided with a pressing plate 401, the pressing plate 401 presses the clamping levers 3 rotatably connected to the base 1 to swing, so that the clamping levers 3 drive the clamping pincers 2 to move relatively to clamp a workpiece 9, one end of each clamping lever 3 is rotatably connected with the clamping pincers 2, the other end of each clamping lever 3 is in rolling contact with the pressing plate 401 of the pull rod 4 through a rolling body 301, the clamping levers 3 and the pull rod 4 are prevented from being worn due to sliding friction, and the rolling bodies 301 are in rolling contact with the pressing plates 401 of the pull rods 4, so that friction is reduced, the failure rate is favorably reduced, the maintenance;

an elastic component 6 is arranged between the base 1 and the clamping lever 3, and when the pull rod 3 loses acting force, the elastic component 6 drives the clamping lever 3 to reset so that the clamping pliers 2 slides towards the direction away from the workpiece, and further the workpiece 9 is released and released;

see fig. 1, 2; preferably, the clamping lever 3 is of an L-shaped structure;

one end of the clamping lever 3 is rotatably connected with the clamping pincers 2, the other end of the clamping lever 3 is provided with a rolling body 301, and the clamping lever 3 is positioned at the L-shaped inflection point and is rotatably connected with the base 1.

Specifically, the shape of the clamping lever 3 is similar to that of an L-shaped structure, one side of the L-shaped structure, which is smaller than 180 degrees, faces the pull rod 4, the clamping lever 3 is rotatably connected with the base 1 at an inflection point of the L-shaped structure through a shaft, the upper end of the clamping lever 3 is rotatably connected with the clamping pliers 2, and the lower end of the clamping lever 3 is provided with a rolling body 301; preferably, the rolling body 301 is a cylindrical structure, and two ends of the rolling body are rotatably connected with the clamping lever 3 through bearings; the structure is simple, the replacement is convenient, or the rolling body 301 can be replaced by a travelling wheel, the clamping lever 3 is provided with a fixed shaft, the travelling wheel is rotatably connected onto the fixed shaft and is in rolling contact with the pressing plate 401, and when the travelling wheel is worn, the travelling wheel can be periodically replaced.

See fig. 1, 3; preferably, the pull rod 4 is vertically and slidably connected to the middle of the base 1;

one end of the pull rod 4 is fixedly connected with a pressing plate 401, and two ends of the pressing plate 401 are provided with convex parts 402 for blocking the rolling body 301 from being separated from the pressing plate 401; the other end of the pull rod 4 is fixedly connected with a piston rod of the air cylinder 5, and the air cylinder 5 provides driving force for the pull rod 4.

Specifically, a pull rod 4 is slidably connected between the clamping levers 3 of the base 1, a pressing plate 401 is mounted at the top end of the pull rod 4, and the bottom end of the pull rod 4 is fixedly connected with a piston rod of the air cylinder 5;

when a piston rod of the air cylinder 5 contracts, the pull rod 4 moves downwards to drive the pressing plate 401 to press the clamping lever 3, so that the clamping lever 3 drives the clamping pincers 2 to move relatively to clamp the workpiece 9, when the piston rod of the air cylinder 5 extends out, the pull rod 4 drives the pressing plate 401 to move upwards, the clamping lever 3 loses the acting force for pressing the rolling body 301, the elastic component 6 drives the pressing and clamping lever 3 to reset, the two ends of the pressing plate 401 are provided with the protruding portions 402 through a bending process, and preferably, the height direction of the protruding portions 402 extends towards the rolling body 301 side. When the elastic component 6 drives the compression clamping lever 3 to reset, the boss 402 blocks the rolling body 301 from being separated from the pressure plate 401, and the rolling body 301 of the elastic component 6 supporting the compression clamping lever 3 is always in contact with the pressure plate 401, so that the pressure plate 401 and the rolling body 301 are prevented from generating impact noise when the air cylinder 5 acts.

Referring to fig. 1, preferably, the elastic member 6 is a compression spring. Preferably, the base 1 is provided with accommodating cavities which are parallel to the axis of the pull rod 4 and are positioned at two sides of the pull rod 4; the containing cavity is connected with a mandril 7 in a sliding way; the containing cavity is internally provided with a compression spring, and the push rod 7 is pushed by the compression spring to extend out of the base 1 and contact with the clamping lever 3, so that the clamping lever 3 drives the clamping pincers 2 to be far away from the workpiece 9.

Specifically, the base 1 is positioned on two sides of the pull rod 4 and is provided with containing cavities, the axes of the containing cavities are parallel to the axis of the pull rod 4, the containing cavities are connected with ejector rods 7 in a sliding mode, the ejector rods 7 extend out of the base 1 through compression spring supports to be in contact with the clamping lever 3, in the structure, the compression springs are in contact with the clamping lever 3 through the ejector rods 7, compression of the compression springs in balanced stress is guaranteed, meanwhile, the containing cavities limit the compression springs in the interior, inclination of the compression springs is avoided when the compression springs are stressed, and the service life of the compression springs is prolonged;

referring to fig. 1, preferably, the contact end of the push rod 7 and the clamping lever 3 is provided with a roller 8, and is in rolling contact with the clamping lever 3 through the roller 8. In the structure, the ejector rod 7 is in rolling contact with the clamping lever 3 through the roller 8, so that the abrasion of the sliding friction surface between the ejector rod 7 and the clamping lever 3 is avoided, the service lives of the ejector rod 7 and the clamping lever 3 are prolonged, the failure rate is reduced, and the aims of reducing the maintenance cost and the repair cost are fulfilled;

as shown in fig. 4;

example two;

preferably, the elastic member 6 is an extension spring; one end of the extension spring is connected with the clamping lever 3, and the other end is connected with the base 1.

Specifically, the second embodiment is basically the same as the first embodiment, except that the elastic member 6 is an extension spring, and compared with the first embodiment, the second embodiment has a simple structure and is convenient to maintain and repair.

As shown in fig. 5;

example three;

preferably, the elastic member 6 is a torsion spring;

one tail end of the torsion spring is in contact with the clamping lever 3, the other tail end of the torsion spring is in contact with the base 1, and the torsion spring pushes the clamping lever 3 to drive the clamping pincers 2 to be far away from the workpiece 9 in a fan-shaped expansion mode.

Specifically, the third embodiment is basically the same as the second embodiment, except that the elastic member 6 is a torsion spring in the third embodiment, and compared with the second embodiment, the third embodiment has a compact structure, which is advantageous for reducing the weight of the centering and clamping device.

In the above technical solution, the utility model provides a centering clamping device;

has the advantages that:

While certain exemplary embodiments of the present invention have been described above by way of illustration only, it will be apparent to those of ordinary skill in the art that the described embodiments may be modified in various different ways without departing from the spirit and scope of the present invention. Accordingly, the drawings and description are illustrative in nature and should not be construed as limiting the scope of the invention.

Claims

1. A centering gripping device, comprising:

the top end of the base (1) is symmetrically connected with a clamping clamp (2) in a sliding way;

the clamping lever (3) is rotatably connected to the lower portion of the clamping pliers (2), the middle portion of the clamping lever (3) is rotatably connected with the base (1), and a rolling body (301) is arranged at the end, far away from the clamping pliers (2), of the clamping lever (3);

a pull rod (4) which is connected on the base (1) in a sliding way and drives the clamping lever (3) to swing so that the clamping pliers (2) clamps a workpiece (9), wherein one end of the pull rod (4) is provided with a pressure plate (401) which is contacted with the rolling body (301), and

and the elastic component (6) is connected between the base (1) and the clamping lever (3), and the elastic component (6) drives the clamping lever (3) to reset so that the clamping pliers (2) releases a workpiece (9).

2. A centering grip according to claim 1, characterized in that;

the clamping lever (3) is of an L-shaped structure;

one end of the clamping lever (3) is rotationally connected with the clamping pincers (2), the other end of the clamping lever (3) is provided with the rolling body (301), and the clamping lever (3) is located at the L-shaped turning point and is rotationally connected with the base (1).

3. A centering grip according to claim 2, wherein;

the rolling body (301) is of a cylindrical structure, and two ends of the rolling body are rotationally connected with the clamping lever (3) through bearings;

or the rolling body (301) comprises a fixed shaft and a travelling wheel rotationally connected to the fixed shaft;

and two ends of the fixed shaft are fixedly connected with the clamping lever (3).

4. A centering grip according to claim 1, characterized in that;

the pull rod (4) is vertically connected to the middle part of the base (1) in a sliding manner;

one end of the pull rod (4) is fixedly connected with the pressing plate (401), and protruding parts (402) are formed at two ends of the pressing plate (401) and used for blocking the rolling body (301) from being separated from the pressing plate (401);

the other end of the pull rod (4) is fixedly connected with a piston rod of the cylinder (5), and the pull rod (4) is provided with driving force through the cylinder (5).

5. A centering and clamping device according to claim 4, characterized in that;

the protruding portion (402) extends in the height direction toward the rolling element (301).

6. A centering and clamping device according to any one of claims 1 to 5, characterized in that;

the elastic component (6) is a compression spring.

7. A centering and clamping device according to claim 6, characterized in that;

the base (1) is positioned on two sides of the pull rod (4) and is provided with an accommodating cavity of which the axis is parallel to that of the pull rod (4);

the containing cavity is connected with a mandril (7) in a sliding way;

the compression spring is arranged in the accommodating cavity, and the ejector rod (7) is pushed by the compression spring to extend out of the base (1) and contact with the clamping lever (3), so that the clamping lever (3) drives the clamping pincers (2) to be far away from the workpiece (9).

8. A centering and clamping device according to claim 7, characterized in that;

and the contact end of the ejector rod (7) and the clamping lever (3) is provided with a roller (8) which is in rolling contact with the clamping lever (3) through the roller (8).

9. A centering and clamping device according to any one of claims 1 to 5, characterized in that;

the elastic component (6) is an extension spring;

one end of the extension spring is connected with the clamping lever (3), and the other end of the extension spring is connected with the base (1).

10. A centering and clamping device according to any one of claims 1 to 5, characterized in that;

the elastic component (6) is a torsion spring;

one tail end of the torsion spring is in contact with the clamping lever (3), the other tail end of the torsion spring is in contact with the base (1), and the torsion spring pushes the clamping lever (3) to drive the clamping pincers (2) to be far away from the workpiece (9) in a fan-shaped expansion mode.