CN112792485A

CN112792485A - Dustproof pin clamping mechanism

Info

Publication number: CN112792485A
Application number: CN202011455912.XA
Authority: CN
Inventors: 逯志浩; 颜杰军; 刘敦敦; 刘浩; 范懿
Original assignee: Dongfeng Motor Corp
Current assignee: Dongfeng Motor Corp
Priority date: 2020-12-10
Filing date: 2020-12-10
Publication date: 2021-05-14

Abstract

The invention discloses a dustproof pin clamping mechanism, relates to the technical field of pin clamping devices, and solves the problem that welding slag is easy to fly into the existing pin clamping mechanism in the using process. Comprises a seat body, wherein a driving piece is arranged in the seat body; the limiting mechanism is arranged on the seat body and is provided with a hole groove; the pull rod is movably arranged in the seat body, one end of the pull rod is provided with a pressing part and a shielding part, and the other end of the pull rod is connected with the driving part; the driving piece drives the pull rod to rotate in the seat body to a position where the pressing portion clamps the workpiece and the shielding portion shields the hole groove. The pin clamping mechanism can prevent impurities such as welding slag from entering the pin clamping mechanism when the pressing part presses the workpiece, and the influence of the impurities such as the welding slag on the operation of the pin clamping mechanism is avoided.

Description

Dustproof pin clamping mechanism

Technical Field

The invention relates to the technical field of pin clamping devices, in particular to a dustproof pin clamping mechanism.

Background

In the welding forming process of an automobile body, sometimes, common supporting compression or fixing positioning pins cannot be adopted for positioning due to equipment space or product production structures, and generally, pin cylinders are adopted for positioning under the condition. However, in the use process of the existing pin clamping mechanism, welding slag easily enters, normal operation of equipment is affected, and faults such as jamming, improper cylinder and the like are caused.

Disclosure of Invention

The invention aims to provide a dustproof pin clamping mechanism capable of effectively preventing welding slag and foreign particles from flying in, and the dustproof pin clamping mechanism is used for solving the problem that the existing pin clamping mechanism is easy to fly in the welding slag in the use process.

In order to achieve the above purpose, the technical scheme of the invention is as follows:

a dust pin clamping mechanism for clamping a workpiece, comprising:

the seat body is internally provided with a driving piece;

the limiting mechanism is arranged on the seat body, and a hole groove is formed in the limiting mechanism;

the pull rod is movably arranged in the seat body, one end of the pull rod is provided with a pressing part and a shielding part, and the other end of the pull rod is connected with the driving part;

the driving piece drives the pull rod to rotate in the seat body to a position where the pressing portion clamps the workpiece and the shielding portion shields the hole groove.

Preferably, the blocking portion extends to one side of the pressing portion along the length direction of the pull rod, and the blocking portion and the pressing portion block the hole groove together.

Preferably, a settling tank is arranged on the limiting mechanism, the settling tank is located at a position where the shielding portion is in contact with the limiting mechanism, and the driving piece drives the shielding portion to rotate to the settling tank and then seal the hole groove.

Preferably, the bottom of the settling tank is a plane, and the surface of the shielding part contacting with the settling tank is a plane.

Preferably, the surface of the shielding part contacting with the settling tank conforms to the shape of the hole groove.

Preferably, the thickness of the shielding part is smaller than that of the pull rod, and the thickness of the shielding part decreases progressively along the direction away from the pull rod.

Preferably, the limiting mechanism comprises a limiting table and a positioning pin, the positioning pin is arranged on the base body, the limiting table is sleeved outside the positioning pin, and the limiting table is fixedly connected with the base body so as to lock the positioning pin on the base body;

the locating pin is internally provided with a cavity for accommodating the end part of the pull rod, and the hole groove is formed in the side wall of the locating pin.

Preferably, the compressing part comprises a compressing block, the compressing block is close to the side wall of the limiting table and is provided with an avoiding groove, the compressing block extends out of the rear of the hole groove and is in contact with the limiting table, and the side wall of the hole groove is located in the avoiding groove.

Preferably, the pressing block is arranged on a first side wall, close to the hole groove, of the pull rod, when the pressing portion clamps the workpiece, the first side wall is attached to the inner wall of the positioning pin, and the hole groove is shielded by the first side wall, the shielding portion and the pressing portion together.

Preferably, the driving member includes a cylinder body and a guiding mechanism, a telescopic rod of the cylinder body is hinged to the pull rod, and the guiding mechanism enables the pull rod to rotate around a hinged position of the pull rod when the pull rod moves along the length direction.

The invention has the beneficial effects that:

set up the occlusion part on the pull rod, when the portion that compresses tightly of pull rod adds with stop gear cooperation and holds the work piece, occlusion part and the common hole groove that seals of portion that compresses tightly stop outside stop gear with welding slag and other impurity that produce during the welding to avoid impurity such as welding slag to influence pin clamping device's normal operating, further ground energy increases pin clamping device's life.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a first guiding mechanism according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of the second guiding mechanism according to the embodiment of the present invention.

The labels in the figure are: the device comprises a base 1, a positioning pin 2, a limiting table 3, a pull rod 4, a guide mechanism 5, a hole groove 201, a settling tank 202, a cavity 203, a pressing part 401, a shielding part 402, a shielding surface 403, a back surface 404 and an avoidance groove 405.

Detailed Description

The technical solutions in the present embodiments will be clearly and completely described below with reference to the accompanying drawings in the present embodiments, which, however, should not be construed as limiting the invention to specific embodiments, but are for explanation and understanding only:

as shown in fig. 1, the present embodiment provides a dustproof pin clamping mechanism, which includes a base 1, a limiting mechanism and a pull rod 4.

In this embodiment, stop gear includes spacing platform 3 and locating pin 2, and pull rod 4 one end is equipped with compressing tightly portion 401 and shielding part 402, and stop gear can integrated into one piece.

The pedestal 1 includes driving piece and mount pad, and the driving piece includes cylinder body and guiding mechanism 5, and the cylinder body passes through bolt fixed connection with the mount pad, is equipped with the installation cavity in the mount pad, and the other end setting of pull rod 4 is in the installation cavity and through the round pin hub connection with the piston rod of cylinder body. The guide mechanism 5 is installed in the installation cavity, the guide mechanism 5 is used for guiding the pull rod 4 when the piston rod drives the pull rod 4 to stretch, the guide mechanism 5 has multiple structures and corresponds to different guide mechanisms 5, and when different guide mechanisms are used, the structures at the bottom end of the pull rod 4 are correspondingly different. A first guide mechanism and a second guide mechanism as shown in fig. 2 and 3.

The first guide mechanism comprises a guide rod, a guide slit is arranged in the middle of the pull rod 4 at the moment, and after the guide rod penetrates through the guide slit, two ends of the guide rod are fixed in the installation cavity. The rod 4 moves vertically along with the vertical movement of the piston rod, and the rod 4 not only moves vertically but also rotates in the left-right direction around the pin shaft by the engagement of the guide slit and the guide rod.

The second guide mechanism comprises two guide rods, namely a front guide rod and a rear guide rod, the front guide rod is positioned on the same side of the pressing part 401, the rear guide rod is positioned on the opposite side of the pressing part 401, and the front guide rod and the rear guide rod are arranged in parallel. The pull rod 4 is provided with a front guide part contacted with the front guide rod on one side of the pressing part 401, the front guide part comprises a vertical front guide surface and a front inclined surface smoothly transited from the bottom of the front guide surface to the front guide rod, and the front inclined surface is inclined from the bottom of the front guide surface to the front guide rod. The pull rod 4 is provided with a rear guide part contacting with the rear guide rod at the opposite side of the pressing part 401, the rear guide part comprises a vertical rear guide surface and a rear inclined surface smoothly transiting with the bottom of the rear guide surface, and the rear inclined surface is inclined from the bottom of the rear guide surface to the front guide rod. The rod 4 is guided by the front and rear guide rods, and moves backward while moving upward, and the pressing portion 401 at the tip of the rod 4 is separated from the stopper table 3. At this time, a workpiece to be clamped can be placed between the limiting table 3 and the pressing portion 401, then the cylinder body is started to enable the piston rod to move downwards, the pull rod 4 moves forwards while moving downwards, and finally the pressing portion 401 is in contact with the workpiece, so that the workpiece and the limiting table 3 are positioned and clamped.

Wherein, the pull rod 4 and the guide mechanism 5 adopt clearance fit on the premise of ensuring the use requirement, so that the pull rod 4 is movably arranged in the seat body 1.

The locating pin 2 sets up on pedestal 1, and spacing platform 3 cup joints outside locating pin 2, and spacing platform 3 adopts bolt fixed mounting on pedestal 1 to lock locating pin 2 on pedestal 1, and guarantee that locating pin 2 does not shift.

The positioning pin 2 is internally provided with a cavity 203 for accommodating the pull rod 4 to move, so that the pull rod 4 is prevented from colliding with the inner wall of the positioning pin 2 in the movement process. The side wall of the positioning pin 2 is provided with a hole groove 201, the hole groove 201 is a through hole and penetrates through the side wall of the positioning pin 2, the shape of the hole groove 201 is not limited, and as long as the pressing part 401 of the pull rod 4 can smoothly penetrate out of and penetrate into the hole groove, in the embodiment, the telescopic part of the pull rod 4 in the hole groove 201 is a rectangular block, and the hole groove 201 is a square hole so as to match the shape of the pull rod 4 and reduce the gap between the pull rod 4 and the hole groove 201.

A shielding portion 402 is formed to extend toward the pressing portion 401 along the longitudinal direction of the draw bar 4, and the shielding portion 402 and the pressing portion 401 together shield the hole groove 201. The shielding part 402 is arranged on one side of the pressing part 401 far away from the seat body 1, the shielding part 402 is provided with a shielding surface 403 and a back surface 404 which are opposite, the back surface 404 is a plane, the back surface 404 is positioned on an extension surface of the side wall of the pull rod 4, the thickness of the shielding part 402 is smaller than that of the pull rod 4, and the thickness of the shielding part 402 decreases progressively along the direction far away from the pull rod 4, so that the shielding part 402 is wedge-shaped, and the shielding part 402 is prevented from influencing the movement of the pull rod 4 in the cavity 203 of the positioning pin 2.

The width of the shielding surface 403 is not less than the width of the hole groove 201, and the height of the shielding surface 403 is not less than the distance between the pressing portion 401 and the hole groove 201.

The stop gear is last to be opened there is subsider 202, hole groove 201 sets up on the tank bottom of subsider 202, namely in this embodiment, subsider 202 sets up the inner wall of locating pin 2, the subsider 202 tank bottom is the plane, it is the plane to shelter from face 403, compress tightly portion 401 and wear out the back by hole groove 201 and compress tightly the work piece when, shelter from face 403 and subsider 202 tank bottom surface contact, the hole groove 201 of sealed portion 401 top that compresses tightly shelters from the piece, avoid the piece in the course of working to get into in the pedestal 1 by the hole groove 201 of compressing tightly portion 401 top clearance.

The portion 401 that compresses tightly includes the compact heap, the compact heap is established on the first lateral wall that pull rod 4 is close to hole groove 201, the lateral wall that the compact heap is close to spacing platform 3 is equipped with and dodges groove 405, the compact heap stretch out behind the hole groove 201 with when spacing platform 3 contacts, a lateral wall of hole groove 201 is located and dodges the groove 405, reduce the compact heap along with the in-process of pull rod 4 motion and the clearance between the hole groove 201, the compact heap has the effect that blocks clastic with the one end of work piece contact, the lateral wall of hole groove 201 is located and dodges when groove 405, further reduce the possibility that the piece got into 2 interior cavities 203 of locating pin, thereby improve and block the effect to clastic.

The width of compact heap is less than pull rod 4's width, and the lateral wall both sides of 4 installation compact heaps of pull rod are compared in the compact heap all have the surplus, and the lateral wall of 4 installation compact heaps of pull rod can contact with the tank bottom surface of subsider 202, when making the compact heap stretch out hole groove 201 and press from both sides tight work piece, the first lateral wall of pull rod 4 pastes with the inner wall of locating pin 2 mutually, first lateral wall, occlusion part 402 and the portion 401 that compresses tightly shelter from hole groove 201 jointly, further promote the sealed effect to hole groove 201, reduce impurity and get into in the dustproof pin fixture.

The invention can be used in, but is not limited to, the field of automobile manufacturing in the field of welding and manufacturing of automobile bodies.

It is to be understood that the above examples are merely illustrative for clarity of description and are not limiting on the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are intended to be within the scope of the invention.

Claims

1. A dust pin fixture for clamping a workpiece, comprising:

the seat body is internally provided with a driving piece;

the driving piece drives the pull rod to rotate in the seat body to a position where the pressing portion clamps the workpiece and the blocking portion blocks the hole groove.

2. The dustproof pin clamping mechanism according to claim 1, wherein the blocking portion is formed by extending to one side of the pressing portion along the length direction of the pull rod, and the blocking portion and the pressing portion together block the hole groove.

3. The dustproof pin clamping mechanism according to claim 2, wherein a settling tank is formed in the limiting mechanism, the settling tank is located at a position where the shielding portion is in contact with the limiting mechanism, and the driving member drives the shielding portion to rotate to the settling tank and then seals the hole groove.

4. The dust pin retaining mechanism of claim 3, wherein the bottom of the settling tank is planar and the surface of the shield in contact with the settling tank is planar.

5. The dust pin clamping mechanism of claim 2, wherein the surface of the shielding portion in contact with the settling tank conforms to the shape of the bore and groove.

6. The dust pin clamping mechanism of claim 2, wherein the thickness of the shielding portion is less than the thickness of the pull rod, and the thickness of the shielding portion decreases in a direction away from the pull rod.

7. The dustproof pin clamping mechanism according to any one of claims 1 to 6, wherein the limiting mechanism comprises a limiting table and a positioning pin, the positioning pin is arranged on the base body, the limiting table is sleeved outside the positioning pin, and the limiting table is fixedly connected with the base body so as to lock the positioning pin on the base body;

8. The dustproof pin clamping mechanism according to claim 7, wherein the pressing portion comprises a pressing block, an avoiding groove is formed in a side wall, close to the limiting table, of the pressing block, and when the pressing block extends out of the hole groove and contacts with the limiting table, a side wall of the hole groove is located in the avoiding groove.

9. The dust pin clamping mechanism according to claim 8, wherein the pressing block is provided on a first side wall of the pull rod close to the hole groove, when the pressing portion clamps the workpiece, the first side wall is attached to the inner wall of the positioning pin, and the first side wall, the shielding portion and the pressing portion together shield the hole groove.

10. The dust pin clamping mechanism according to claim 1, wherein the driving member comprises a cylinder and a guiding mechanism, a telescopic rod of the cylinder is hinged to the pull rod, and the guiding mechanism enables the pull rod to rotate around the hinged position of the pull rod when the pull rod moves in the length direction.