CN114986063B

CN114986063B - Spring positioning pin device applied to automatic welding line

Info

Publication number: CN114986063B
Application number: CN202210929630.1A
Authority: CN
Inventors: 唐振凯
Original assignee: Shenzhen Xinshunkang Precision Machinery Co ltd
Current assignee: Shenzhen Xinshunkang Precision Machinery Co ltd
Priority date: 2022-08-04
Filing date: 2022-08-04
Publication date: 2022-10-21
Anticipated expiration: 2042-08-04
Also published as: CN114986063A

Abstract

The invention discloses a spring positioning pin device applied to an automatic welding line, which comprises a transfer block, a gripper positioning pin and a metal plate, wherein the metal plate is provided with a positioning hole; the gripper positioning pin is fixedly connected with a mounting block, the mounting block is connected with an extrusion block through a second spring, a rectangular groove is formed in the extrusion block, and an extrusion plate is connected to the rectangular groove through a fourth spring. The invention can prevent the metal plate from shaking caused by the movement of the clamp positioning pin, has good stability under the limiting action of the two clamping plates, prevents the metal plate from sliding after the clamp positioning pin is withdrawn, has better positioning effect on the metal plate, not only improves the positioning precision of the metal plate, but also does not need two cylinders, greatly reduces the cost and has low manufacturing cost.

Description

Spring positioning pin device applied to automatic welding line

Technical Field

The invention relates to the technical field of mechanical part positioning, in particular to a spring positioning pin device applied to an automatic welding line.

Background

With the continuous progress of science and technology, the development of robot industrialization is very rapid, a plurality of robot tools and grippers are applied to a white body automatic line welding line, the manipulator is more and more widely applied to the welding line of an automobile host factory, and the grippers can improve the production beat.

The publication No. CN110081058A discloses a spring positioning pin device applied to an automatic welding line, which is used for positioning sheet metal parts and has the structure that: an adjusting bolt of the spring positioning pin device is arranged at the tail part of the sleeve in a threaded manner with a screw rod facing inwards; the head of the clamp positioning pin is exposed out of the top end of the sleeve, and the like.

According to the comparison documents, in order to ensure the precision of the vehicle body, positioning pins are usually utilized for positioning, comprehensive consideration is carried out on the aspects of the appearance, the sealing performance and the like of a metal plate, a plurality of high-precision positioning holes cannot be designed on the metal plate, a gripper and a clamp need to share the positioning holes, after the positioning pins of the clamp are controlled to withdraw by using cylinders, a robot takes the gripper to take out the metal plate, the operation process needs to utilize the gripper, the clamp, two cylinders and a control system, the cost is high, the metal plate is easy to slide after the positioning pins of the clamp are withdrawn, and the positioning and fastening effects on the metal plate are poor.

Disclosure of Invention

The invention aims to solve the following defects in the prior art that a gripper and a clamp need to share a positioning hole, a robot takes the gripper to take a part after a positioning pin of the clamp is controlled to withdraw by using a cylinder, the operation process needs to use the gripper, the clamp, two cylinders and a control system, the cost is higher, the metal plate part is easy to slide after a positioning pin of the clamp is withdrawn, and the positioning and fastening effects on the metal plate part are poorer.

In order to achieve the purpose, the invention adopts the following technical scheme:

a spring positioning pin device applied to an automatic welding line comprises a transfer block, a gripper positioning pin and a metal plate part, wherein a positioning hole is formed in the metal plate part, a sleeve is mounted on the transfer block, a mounting cavity is formed in the sleeve, and the mounting cavity is connected with the gripper positioning pin through a first spring;

the gripper positioning pin is fixedly connected with an installation block, the installation block is connected with an extrusion block through a second spring, a rectangular groove is formed in the extrusion block, an extrusion plate is connected to the rectangular groove through a fourth spring, a second magnet is fixedly connected to the extrusion block, two moving blocks are connected to the sleeve in a sliding mode, a sliding groove is formed in each moving block, a hinge block is connected to the sliding groove in a sliding mode, a clamping plate is fixedly connected to each moving block, a rotating assembly is arranged on the sleeve and comprises a fixed plate fixedly arranged on the sleeve, a rotating block is connected to the fixed plate in a rotating mode, a torsion spring is fixedly connected to the rotating block and fixedly connected with the fixed plate, and each hinge block is hinged to the rotating block;

the fixture locating pin is characterized in that a sliding cavity is formed in the fixture locating pin, a sliding assembly is arranged on the sliding cavity, the sliding assembly comprises a plurality of fastening rods which are connected with the fixture locating pin in a sliding mode, a sliding rod is connected to the fixture locating pin through a third spring, and the sliding rod is connected with the fastening rods through a plurality of hinged rods respectively and correspondingly.

As a preferred scheme, the sleeve is provided with an opening communicated with the installation cavity, the inner wall of one side of the opening is fixedly connected with a first magnet, and the sliding rod is fixedly connected with a convex block.

As a preferred scheme, the installation cavity is fixedly connected with a threaded rod which is vertically arranged, the convex block is connected with the threaded rod in a sliding mode, the convex block is connected with a cam in a rotating mode, and the cam is connected with the threaded rod in a threaded mode.

As a preferred scheme, sliding connection has on the sleeve with the stripper bar that the turning block cooperation was used, fixedly connected with sixth spring on the stripper bar, the sixth spring with muffjoint, the transversal right trapezoid setting of personally submitting of stripper bar.

As a preferred scheme, every fastening rod one end all is provided with the circular arc terminal surface, fastening rod one end fixedly connected with a plurality of friction archs.

Compared with the prior art, the invention has the beneficial effects that:

1. when the friction protrusions on the fastening rods are tightly attached to the inner wall of the positioning hole, the friction force between the friction protrusions and the inner wall of the positioning hole can be increased, so that the sheet metal part can be positioned and fastened better, after the friction protrusions are separated from the inner wall of the positioning hole, the clamp positioning pins vertically move downwards, the sheet metal part can be prevented from shaking due to the movement of the clamp positioning pins, and the sheet metal part is good in stability under the limiting action of the two clamping plates and prevented from sliding after the clamp positioning pins are withdrawn, so that the positioning effect on the sheet metal part is better, the positioning precision of the sheet metal part is improved, two air cylinders are not needed, the cost is greatly reduced, and the manufacturing cost is low;

2. when the clamp positioning pin completely exits from the positioning hole, the rotating block and the fixing plate rotate relatively, the distance between the two clamping plates is increased and the clamping plates do not contact with the surface of the metal plate, then the metal plate can be grabbed by the gripper without the limitation of the clamping plates, so that the grabbing process of the metal plate is smoother, the clamping plates are separated from the metal plate at a point before the gripper grabs the metal plate, the probability that the metal plate slides before the gripper picks the metal plate can be greatly reduced, and the positioning effect of the metal plate is better;

3. the part of the arc end surface of the fastening rod, which is close to the upper part, is not provided with the friction bulge, so that the situation that the metal plate part deviates due to overlarge friction force between the fastening rod and the positioning hole in the process that the clamp positioning pin enters the positioning hole can be prevented, and the clamp positioning pin can smoothly enter the positioning hole to position and fasten the metal plate part.

Drawings

FIG. 1 is a schematic front view of a spring positioning pin device applied to an automatic welding line according to the present invention;

FIG. 2 is a schematic side view of a spring positioning pin device applied to an automatic welding line according to the present invention;

FIG. 3 is a schematic cross-sectional view of a spring positioning pin device applied to an automatic welding line according to the present invention;

FIG. 4 is a schematic top perspective view of a spring positioning pin device applied to an automatic welding line according to the present invention;

FIG. 5 is a schematic view of a partial top cross-sectional view of a clamp locating pin and a plate member.

In the figure: the device comprises a transfer block 1, a sleeve 2, a sheet metal part 3, an extrusion rod 4, a clamp positioning pin 5, a gripper positioning pin 6, an installation block 7, an extrusion block 8, a clamping plate 9, a moving block 10, a rotating block 11, a first magnet 12, a fixing plate 13, a hinged block 14, a squeezing plate 15, a threaded rod 16, a first spring 17, a convex block 18, a cam 19, a hinged rod 20, a sliding rod 21, a fastening rod 22, a third spring 23, a sliding groove 24, an installation cavity 25 and a positioning hole 26.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Referring to fig. 1-5, an use spring positioning pin device at automatic weld assembly line, including adapter block 1, tongs locating pin 6 and metal plate spare 3, locating hole 26 has been seted up on the metal plate spare 3, install sleeve 2 on the adapter block 1, install the installation cavity 25 has been seted up on the sleeve 2, be connected with anchor clamps locating pin 5 through first spring 17 on the installation cavity 25, fixedly connected with installation piece 7 on the tongs locating pin 6, installation piece 7 has extrusion piece 8 through second spring coupling, sliding connection has two movable blocks 10 on the sleeve 2, spout 24 has all been seted up on every movable block 10, sliding connection has articulated piece 14 in spout 24, fixedly connected with splint 9 on the movable block 10.

Be provided with rotating assembly on sleeve 2, rotating assembly is including fixed plate 13 that sets up on sleeve 2, it is connected with turning block 11 to rotate on the fixed plate 13, set up the opening that communicates each other with installation cavity 25 on the sleeve 2, the first magnet 12 of fixedly connected with on the inner wall of opening one side, fixedly connected with second magnet on the extrusion piece 8, fixedly connected with convex block 18 on the slide bar 21, because first magnet 12 and second magnet are opposite to surperficial magnetism mutually, there is the effort of inter attraction between first magnet 12 and the second magnet, under the effect of effort, relative slip takes place for extrusion piece 8 and installation piece 7, be in the open-ended directly over just after extrusion piece 8 removes.

The slip chamber has been seted up on anchor clamps locating pin 5, be provided with the slip subassembly on the slip chamber, the slip subassembly includes a plurality of anchorage bars 22 with anchor clamps locating pin 5 sliding connection, be connected with slide bar 21 through third spring 23 on the anchor clamps locating pin 5, slide bar 21 is connected with corresponding anchorage bar 22 respectively through a plurality of hinge bar 20, every anchorage bar 22 one end all is provided with the circular arc terminal surface, a plurality of friction of anchorage bar 22 one end fixedly connected with are protruding, the one end that anchorage bar 22 is close to locating hole 26 inner wall has set up the circular arc terminal surface, the circular arc terminal surface does not set up the friction arch by the part of top, can prevent that anchor clamps locating pin 5 from getting into the in-process of locating hole 26, frictional force between anchorage bar 22 and the locating hole 26 is too big, be favorable to in the smooth entering locating hole 26 of anchor clamps locating pin 5, fix a position 3.

The rectangular groove is formed in the extrusion block 8, the extrusion plate 15 is connected to the rectangular groove through a fourth spring, when the extrusion block 8 continuously moves downwards and penetrates through the opening, the extrusion plate 15 can slide relative to the rectangular groove, the fourth spring deforms simultaneously, when the extrusion block 8 is just separated from the rotating block 11, the rotating block 11 can reversely rotate by a certain angle under the elastic force action of the torsion spring, each clamping plate 9 is not attached to the surface of the metal plate part 3 until the surface of the rotating block 11 is contacted with the surface of the extrusion plate 15, the torsion spring is fixedly connected to the rotating block 11, the torsion spring is fixedly connected with the fixing plate 13, each hinged block 14 is hinged to the rotating block 11, after the rotating block 11 rotates, the torsion spring deforms, the hinged block 14 slides in the sliding groove 24 of the moving block 10 in a limiting mode, the hinged block 14 is hinged to the rotating block 11, and the hinged block 14 can slide in the sliding groove 24 along with the rotation of the rotating block 11.

Fixedly connected with is the threaded rod 16 of vertical setting in the installation cavity 25, and convex block 18 and threaded rod 16 sliding connection rotate on the convex block 18 and are connected with cam 19, and cam 19 and threaded rod 16 threaded connection have on the sleeve 2 extrusion stem 4 with the cooperation of turning block 11 use, fixedly connected with sixth spring on the extrusion stem 4, and sixth spring and sleeve 2 are connected, and extrusion stem 4 is transversal personally submits the right trapezoid and sets up.

The vertical in-process that moves down of convex block 18, can take place relative slip with threaded rod 16, cam 19 can carry out threaded connection with threaded rod 16, and take place relative rotation with convex block 18, when anchor clamps locating pin 5 withdraws from locating hole 26 completely, cam 19 rotates a certain position department just, and contact with the inclined plane of extrusion stem 4, because extrusion stem 4's transversal right trapezoid setting of personally submitting, when cam 19 rotates a certain position and contacts with the 4 inclined planes of extrusion stem, cam 19 has vertical ascending extrusion effort to extrusion stem 4, under the effect of action, extrusion stem 4 vertical upward movement, the deformation takes place simultaneously for the sixth spring.

In the invention, in an initial state, one end of the clamp positioning pin 5 is positioned in the positioning hole 26 of the plate part 3, the friction protrusions on each fastening rod 22 are contacted with the inner wall of the positioning hole 26, when a robot drives the hand grip to take a workpiece, one end of the hand grip positioning pin 6 moves vertically and downwards, the extrusion block 8 moves vertically and downwards simultaneously under the transmission action of the mounting block 7, the extrusion block 8 contacts with a part of the rotating block 11 positioned on one side of the fixed plate 13 in the moving process, the extrusion block 8 moves against the rotating block 11 along with the continuous downward movement of the hand grip positioning pin 6, the rotating block 11 rotates relative to the fixed plate 13 simultaneously, the torsion spring deforms simultaneously, the rotating block 11 is in a horizontal state in the initial state, the rotating block 11 has a certain inclination angle after rotating, and inclines downwards along with the side contacted with the extrusion block 8, the hinge block 14 slides in the sliding groove 24 of the movable block 10 in a limiting manner, the hinge block 14 is hinged to the rotating block 11, and the hinge block 14 slides in the sliding groove 24 along with the sleeve 2 simultaneously.

After the two moving blocks 10 move, the distance between the two moving blocks is reduced until the clamping plates 9 on the moving blocks 10 are attached to the surface of the metal plate 3, at the very moment, the second magnet on the extrusion block 8 is opposite to the first magnet 12 on the sleeve 2, because the magnetic properties of the opposite surfaces of the first magnet 12 and the second magnet are opposite, an attractive force exists between the first magnet 12 and the second magnet, under the action of the attractive force, the extrusion block 8 and the installation block 7 slide relatively, because one end of the second spring is fixedly connected with the installation block 7 and the other end of the second spring is fixedly connected with the extrusion block 8, the second spring deforms simultaneously, after the extrusion block 8 moves under the action of the attractive force, the bottom end of the extrusion block 8 is just above the opening, the extrusion plate 15 is located above the rotating block 11, when the extrusion block 8 just begins to be separated from the rotating block 11, the rotating block 11 can rotate reversely by a little angle under the elastic force of the torsion spring, each clamping plate 9 is not attached to the surface of the extrusion block 3 until the surface of the rotating block 11 is contacted with the surface of the extrusion plate 15.

Then the extrusion block 8 moves downwards along with the gripper positioning pin 6, the extrusion plate 15 moves together against the rotation block 11, after the rotation block 11 rotates, the surfaces of the two clamping plates 9 are attached to the surface of the metal plate 3 again, when the extrusion block 8 moves downwards continuously and passes through the opening, the extrusion plate 15 slides relative to the rectangular groove, the fourth spring deforms simultaneously, after the extrusion block 8 moves to a certain position, the extrusion block moves downwards along with the convex block 18, the convex block 18 and the sliding rod 21 slide relative to the fixture positioning pin 5 at first, the third spring 23 deforms, the position of the fixture positioning pin 5 remains unchanged, because one end of the hinge rod 20 is hinged to the sliding rod 21, the other end of the hinge rod is hinged to the corresponding fastening rod 22, the inclination angle of the hinge rod 20 changes, the fastening rod 22 slides relative to the fixture positioning pin 5, the friction bulge on each fastening rod 22 is separated from the inner wall of the positioning hole 26, and when the deformation amount of the third spring 23 reaches the maximum, the extrusion block 8 moves downwards along with the convex block 18 and the fixture positioning pin 5.

When the friction protrusions on the fastening rods 22 are tightly attached to the inner walls of the positioning holes 26, the friction force between the friction protrusions and the inner walls of the positioning holes 26 can be increased, so that the sheet metal parts 3 can be better positioned, after the friction protrusions are separated from the inner walls of the positioning holes 26, the clamp positioning pins 5 vertically move downwards, the sheet metal parts 3 can be prevented from shaking due to the movement of the clamp positioning pins 5, the sheet metal parts 3 can be prevented from sliding after the clamp positioning pins 5 are withdrawn, the sheet metal parts 3 are better in stability under the limiting action of the two clamping plates 9, the positioning effect of the sheet metal parts 3 is better, the positioning precision of the sheet metal parts 3 is improved, two air cylinders are not needed, the cost is greatly reduced, the manufacturing cost is low, the convex blocks 18 can slide relative to the threaded rods 16 in the vertical and downward movement process, the cam 19 rotates on the convex blocks 18 in a limiting mode, the cam 19 is further in threaded connection with the threaded rods 16, and the cam 19 can rotate relative to the convex blocks 18 in the downward movement process.

When the clamp positioning pin 5 completely exits the positioning hole 26, the cam 19 just rotates to a certain position and contacts with the inclined surface of the extrusion rod 4, because the cross section of the extrusion rod 4 is in a right trapezoid shape, when the cam 19 rotates to a certain position and contacts with the inclined surface of the extrusion rod 4, the cam 19 has a vertical upward extrusion acting force on the extrusion rod 4, the extrusion rod 4 moves vertically upward under the action of the acting force, the sixth spring deforms simultaneously, the extrusion rod 4 contacts with the downward inclined part of the rotating block 11 and moves upwards for a certain distance together in the upward moving process, so that the extrusion plate 15 can move upwards for a certain distance, the rotating block 11 and the fixing plate 13 rotate relatively, at the moment, the distance between the two clamping plates 9 is increased and does not contact with the surface of the sheet metal part 3, then the sheet metal part 3 can be grabbed by using the gripper, the grabbing process of the sheet metal part 3 is smoother, and the clamping plates 9 are separated from the sheet metal part 3 at a point before the gripper grabs the sheet part 3, so that the probability of sliding of the sheet metal part 3 under the action of external force can be greatly reduced, and the positioning effect of the sheet metal part 3 is better.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered as the technical solutions and the inventive concepts of the present invention within the technical scope of the present invention.

Claims

1. A spring positioning pin device applied to an automatic welding line comprises a transfer block (1), a gripper positioning pin (6) and a metal plate part (3), and is characterized in that a positioning hole (26) is formed in the metal plate part (3), a sleeve (2) is mounted on the transfer block (1), a mounting cavity (25) is formed in the sleeve (2), and the mounting cavity (25) is connected with a gripper positioning pin (5) through a first spring (17);

the gripper positioning pin (6) is fixedly connected with a mounting block (7), the mounting block (7) is connected with an extrusion block (8) through a second spring, a rectangular groove is formed in the extrusion block (8), an extrusion plate (15) is connected to the rectangular groove through a fourth spring, a second magnet is fixedly connected to the extrusion block (8), two moving blocks (10) are slidably connected to the sleeve (2), a sliding groove (24) is formed in each moving block (10), a hinge block (14) is slidably connected to the sliding groove (24), a clamping plate (9) is fixedly connected to each moving block (10), a rotating assembly is arranged on the sleeve (2) and comprises a fixing plate (13) fixedly arranged on the sleeve (2), a rotating block (11) is rotatably connected to the fixing plate (13), a torsion spring is fixedly connected to the rotating block (11), the torsion spring is fixedly connected to the fixing plate (13), and each hinge block (14) is hinged to the rotating block (11);

the clamp is characterized in that a sliding cavity is formed in the clamp positioning pin (5), a sliding assembly is arranged on the sliding cavity, the sliding assembly comprises a plurality of fastening rods (22) which are connected with the clamp positioning pin (5) in a sliding mode, a sliding rod (21) is connected to the clamp positioning pin (5) through a third spring (23), and the sliding rod (21) is connected with the fastening rods (22) through a plurality of hinged rods (20) respectively and correspondingly.

2. The spring positioning pin device applied to the automatic welding line according to claim 1, wherein an opening communicated with the mounting cavity (25) is formed in the sleeve (2), a first magnet (12) is fixedly connected to the inner wall of one side of the opening, and a convex block (18) is fixedly connected to the sliding rod (21).

3. The spring positioning pin device applied to the automatic welding line is characterized in that a vertically arranged threaded rod (16) is fixedly connected in the mounting cavity (25), the convex block (18) is in sliding connection with the threaded rod (16), a cam (19) is rotatably connected on the convex block (18), and the cam (19) is in threaded connection with the threaded rod (16).

4. The spring positioning pin device applied to the automatic welding line is characterized in that an extrusion rod (4) matched with the rotating block (11) is connected to the sleeve (2) in a sliding manner, a sixth spring is fixedly connected to the extrusion rod (4), the sixth spring is connected with the sleeve (2), and the cross section of the extrusion rod (4) is in a right trapezoid shape.

5. The spring positioning pin device applied to the automatic welding line according to claim 1, wherein one end of each fastening rod (22) is provided with a circular arc end face, and a plurality of friction protrusions are fixedly connected to one end of each fastening rod (22).