Sliding centering mechanism of positioning pin

Abstract

The utility model relates to the technical field of workpiece clamping, in particular to a sliding centering mechanism of a positioning pin, and solves the technical problems that in an existing automatic welding system, a welding angle plate on a workpiece is troublesome to fix due to small operation space; according to the technical scheme, the sliding centering mechanism of the positioning pin comprises a base, an air cylinder, a push-pull assembly, a supporting table assembly, a rocker arm assembly and a pin lock assembly. The pin lock assembly is horizontally inserted into the pin hole outwards from the interior of the notch of the angle plate to fix the angle plate. According to the utility model, the rocker arm assembly carrying the pin lock assembly is matched in a cylinder driving manner, so that the two side wall plates of the angle plate can be locked by reversely sliding the pin in the notch of the angle plate, the angle plate locking device can be conveniently applied in a narrow space in an automatic welding system, the locking effect is good, manual operation of workers is not needed, the labor input cost is reduced, and the working efficiency is improved. The problem that in an existing automatic welding system, a welding angle plate on a workpiece is troublesome to fix due to the fact that the operation space is small is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of workpiece clamping, in particular to a sliding centering mechanism of a positioning pin. Background Art

[0002] In the application of workpiece welding production, the angle plates used for assembly of the workpiece after forming are generally not formed integrally with the workpiece body, but are mostly connected by later welding. In order to ensure that there is sufficient strength between the angle plate and the workpiece body after welding, welding is generally performed around the joint surface of the angle plate and the workpiece body structure to form a continuous weld.

[0003] However, in the automated welding system currently used in industry, the welding guns are located on both sides of the angle plate and the workpiece body, and the welding operation is carried out simultaneously. The two welding guns are located very close to the angle plate, and the distance between them is very short. If the traditional method of clamping or latching the angle plate is used, there is not enough operating space. Moreover, if the angle plate is manually fixed by workers, the welding operation of a large number of workpieces is very labor-intensive, and repeated clamping, unloading, and picking and placing are very troublesome.

[0004] Therefore, in order to address the problem that it is troublesome to fix the welding angle plate on the workpiece due to the small operating space in the above-mentioned current automated welding system, a positioning pin structure can be designed which can automatically slide outward from the groove of the angle plate and lock therein. This structure is not affected by the small operating space and has fast positioning and good effect. Utility Model Content

[0005] In order to overcome the problem that it is troublesome to fix the welding angle plate on the workpiece due to the small operating space in the current automated welding system.

[0006] The technical solution of the utility model is: a sliding centering mechanism of a positioning pin, comprising a base, a cylinder, a push-pull assembly, a support assembly, a rocker assembly, and a pin lock assembly; the base is fixedly mounted on a welding workbench by bolt fasteners, the cylinder is mounted inside the base and the piston rod of the cylinder extends to the outside of the front end of the base, the front end of the piston rod of the cylinder is fixedly mounted with a push-pull assembly, a support assembly located in front of the push-pull assembly is anchored with bolts on the welding workbench, a rocker assembly is arranged between the push-pull assembly and the support assembly, the rocker assembly has two rotatable Z-shaped swivel arms, a pin lock assembly matched with the pin hole on the workpiece angle plate is arranged on the back side of the front end of the swivel arm, and the pin lock assembly is horizontally inserted into the pin hole from the inside of the notch of the angle plate to the outside to fix the angle plate.

[0007] Preferably, when the workpiece and the angle plate are in place, the cylinder drives the push-pull assembly to extend forward, and the rocker arm assembly is forced to rotate in the opposite direction, driving the pin lock assembly to slide in the opposite direction on the support platform assembly, approaching the wall panels on the left and right sides from the groove of the angle plate until it is pushed into the corresponding pin hole to fix the angle plate.

[0008] Preferably, the push-pull assembly includes a push-pull table and a No. 1 through slot; the push-pull table is a hollow plate structure with an open front end, and two left-right symmetrical No. 1 through slots are respectively provided at the upper and lower ends of the push-pull table, and the two No. 1 through slots on the same horizontal plane are in an eight-shaped structure with an intersection angle of 120 degrees. The cylinder drives the push-pull table to move forward and backward, generating a push-pull force in the forward and backward directions on the rocker arm assembly, and with the help of the eight-shaped structure of the No. 1 through slot, the rocker arm assembly can have space to rotate while being subjected to force.

[0009] Preferably, the support platform assembly includes a support plate, a slide groove, and an axle column; the support plate is arranged at the lower front side of the push-pull platform, and a slide groove perpendicular to the sliding direction of the push-pull platform is provided on the side of the upper end of the support plate away from the push-pull platform, and two left and right opposite axle columns are fixedly connected to the side of the upper end of the support plate close to the push-pull platform. The support plate serves as a supporting platform for the front end of the rocker arm assembly, and the axle column is used as the rotation axis of the rocker arm assembly.

[0010] Preferably, the rocker arm assembly includes a swivel arm, a No. 1 clamping shaft, and a No. 2 through slot; one end of the swivel arm is located on the inner side of the push-pull platform, and the other end is located above the slide slot; an axial hole that is sleeved on the outer side of the corresponding shaft column is provided at the middle bend of the Z-shaped structure of the swivel arm; a No. 2 through slot that runs longitudinally through is provided at the end of the swivel arm that is located above the slide slot; after the rear end of the swivel arm is subjected to the push-pull force of the push-pull platform, the No. 1 clamping shaft moves in the No. 1 through slot, so that the swivel arm rotates with the shaft column as the axis, driving the front end of the swivel arm to rotate slightly above the slide slot, and the position of the No. 2 through slot changes.

[0011] Preferably, the pin lock assembly includes a pin head and a No. 2 clamping shaft; a metal plate is fixedly connected to one end of the pin head, a horizontal slot is provided at the side wall of the swivel arm above the slide slot, the metal plate is inserted in the horizontal slot, and the upper and lower ends of the metal plate are fixedly connected to the No. 2 clamping shaft inserted in the No. 2 through slot, and the No. 2 clamping shaft at the lower end is slidably connected in the slide slot, and when the front end of the swivel arm rotates and moves, the No. 2 through slot provides a certain space for the movement of the No. 2 clamping shaft, and the No. 2 clamping shaft moves stably along the slide slot following the rotation of the swivel arm.

[0012] Preferably, the end of the pin head facing the edge of the support plate is an arc-shaped protruding structure, and four arc-shaped concave notches are arranged around the outer wall of the arc-shaped protruding structure. A limiting column with a diameter larger than the diameter of the pin hole on the angle plate is arranged between the arc-shaped protruding structure and the metal plate. When the No. 2 clamping shaft moves in the opposite direction along the slide groove, the pin head approaches the two side wall panels of the angle plate and pushes into the corresponding pin holes to lock the angle plate.

[0013] Preferably, a baffle and a cover plate are fixedly connected to the front end of the base. The baffle covers the top of the rocker arm assembly and is located on the inner side of the groove of the angle plate. The cover plate is located above the baffle and has circular rubber structure pressing plates installed on the left and right sides that rest against the upper edge of the angle plate. A screw is provided in the middle of the pressing plate, and the edge of the angle plate can be squeezed by rotating the pressing plate to make it more stable when in place.

[0014] Beneficial effects of the utility model:

[0015] 1. The rocker arm assembly with the pin lock assembly can be driven by the cylinder to slide the pin in the opposite direction from the notch of the angle plate to lock the two side panels of the angle plate, which is convenient for application in the narrow space of the automated welding system. The locking effect is good, and manual operation is not required, which reduces the labor input cost.

[0016] 2. The horizontal push-pull force generated by the cylinder drive controls the rotation and sliding of the rotating arm. The moving stroke of the pin lock assembly is short and the pin lock speed is fast;

[0017] 3. Use baffles to shield the operating area of ​​the rocker arm assembly to prevent dust from entering and prevent dust from causing poor operation of the rocker arm assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The figure shows a schematic diagram of the overall assembly structure of the sliding centering mechanism of the positioning pin of the utility model;

[0019] Figure 2 Shown is a schematic diagram of the first three-dimensional structure of the sliding centering mechanism of the positioning pin and the corner plate assembly of the utility model;

[0020] Figure 3 Shown is a schematic diagram of a second three-dimensional structure of the sliding centering mechanism of the positioning pin and the corner plate assembly of the utility model;

[0021] Figure 4 The first three-dimensional structure schematic diagram of the sliding centering mechanism of the positioning pin of the utility model is shown;

[0022] Figure 5 The second three-dimensional structure schematic diagram of the sliding centering mechanism of the positioning pin of the utility model is shown;

[0023] Figure 6 What is shown is a schematic diagram of an enlarged three-dimensional structure of the details of the sliding centering mechanism of the positioning pin of the utility model.

[0024] Explanation of the reference numerals in the accompanying drawings: 1. base; 2. cylinder; 7. baffle; 8. cover plate; 9. pressing plate; 301. push-pull table; 302. No. 1 through slot; 401. support plate; 402. slide slot; 403. shaft column; 501. rotating arm; 502. No. 1 clamping shaft; 503. No. 2 through slot; 601. pin head; 602. No. 2 clamping shaft. DETAILED DESCRIPTION

[0025] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0026] See also Figure 1-3The utility model provides an embodiment: a sliding centering mechanism of a positioning pin, comprising a base 1, a cylinder 2, a push-pull assembly, a support assembly, a rocker assembly, and a pin lock assembly; the base 1 is fixedly mounted on a welding workbench by bolt fasteners, the cylinder 2 is mounted inside the base 1 and the piston rod of the cylinder 2 extends to the outside of the front end of the base 1, the front end of the piston rod of the cylinder 2 is fixedly mounted with a push-pull assembly, a support assembly located in front of the push-pull assembly is anchored on the welding workbench by bolts, and a push-pull assembly and the support assembly are arranged between the push-pull assembly and the support assembly There is a rocker arm assembly, which has two rotatable Z-shaped rotating arms 501. A pin lock assembly that is compatible with the pin hole on the workpiece angle plate is arranged on the back side of the front end of the rotating arm 501. The pin lock assembly is horizontally inserted into the pin hole from the inside of the groove of the angle plate to fix the angle plate. When the workpiece and the angle plate are in place, the cylinder 2 drives the push-pull assembly forward, and the rocker arm assembly is forced to rotate in the opposite direction, driving the pin lock assembly to slide in the opposite direction on the support assembly, approaching the wall panels on the left and right sides from the groove of the angle plate until it is pushed into the corresponding pin hole to fix the angle plate.

[0027] See also Figure 3-6In this embodiment, the push-pull assembly includes a push-pull table 301 and a No. 1 through slot 302; the push-pull table 301 is a hollow plate structure with an open front end, and two left-right symmetrical No. 1 through slots 302 are respectively provided at the upper and lower ends of the push-pull table 301, and the two No. 1 through slots 302 on the same horizontal plane are in an eight-shaped structure with an intersection angle of 120 degrees. The cylinder 2 drives the push-pull table 301 to move forward and backward, and generates a push-pull force in the front-to-back direction on the rocker arm assembly. With the help of the eight-shaped structure of the No. 1 through slot 302, the rocker arm assembly can have space to rotate while being subjected to force. The support table assembly includes a support plate 401, a slide slot 402, and a shaft column 403; the support plate 401 is arranged at the lower front side of the push-pull table 301 A slide groove 402 perpendicular to the sliding direction of the push-pull platform 301 is provided on the side of the upper end of the support plate 401 away from the push-pull platform 301, and two left and right opposite shaft columns 403 are fixedly connected to the side of the upper end of the support plate 401 close to the push-pull platform 301. The support plate 401 serves as a supporting platform for the front end of the rocker arm assembly, and the shaft column 403 is used as the rotation axis of the rocker arm assembly. The rocker arm assembly includes a rotating arm 501, a No. 1 clamping shaft 502, and a No. 2 through groove 503; one end of the rotating arm 501 is located on the inner side of the push-pull platform 301, and the other end is located above the slide groove 402. An axial hole that is sleeved on the outer side of the corresponding shaft column 403 is provided at the middle bending part of the Z-shaped structure of the rotating arm 501, and the rotating arm 501 is located above the slide groove 402. A longitudinally penetrating No. 2 through slot 503 is provided at one end. After the rear end of the rotating arm 501 is subjected to the push-pull force of the push-pull platform 301, the No. 1 clamping shaft 502 moves in the No. 1 through slot 302, so that the rotating arm 501 rotates with the shaft column 403 as the axis, driving the front end of the rotating arm 501 to rotate slightly above the slide slot 402, and the position of the No. 2 through slot 503 changes. The pin lock assembly includes a pin head 601 and a No. 2 clamping shaft 602; a metal plate is fixedly connected to one end of the pin head 601, and a horizontal slot is provided on the side wall of the rotating arm 501 above the slide slot 402. The metal plate is inserted into the horizontal slot, and the upper and lower ends of the metal plate are fixedly connected to the No. 2 clamping shaft inserted in the No. 2 through slot 503 602, the second clamping shaft 602 at the lower end is slidably connected in the slide groove 402, and when the front end of the rotating arm 501 rotates and moves, the second through groove 503 provides a certain space for the movement of the second clamping shaft 602, and the second clamping shaft 602 follows the rotation of the rotating arm 501 and moves stably along the slide groove 402. The end of the pin head 601 facing the edge of the support plate 401 is an arc-shaped protrusion structure, and four arc-shaped inward concave notches are arranged around the outer wall of the arc-shaped protrusion structure. A limiting column with a diameter larger than the diameter of the pin hole on the angle plate is arranged between the arc-shaped protrusion structure and the metal plate. When the second clamping shaft 602 moves in the opposite direction along the slide groove 402, the pin head 601 approaches the two side wall panels of the angle plate and pushes into the corresponding pin holes to lock the angle plate.

[0028] See also Figure 2In this embodiment, a baffle 7 and a cover plate 8 are fixedly connected to the front end of the base 1. The baffle 7 covers the top of the rocker arm assembly and is located on the inner side of the groove of the angle plate. The cover plate 8 is located above the baffle 7 and has circular rubber structure pressing plates 9 installed on the left and right sides that rest against the upper edge of the angle plate. The pressing plate 9 has a screw in the middle, and the edge of the angle plate can be squeezed by rotating the pressing plate 9 to make it more stable when in place.

[0029] When working, the worker places the workpiece body and the angle plate on the welding table, so that the notch of the angle plate is above the support plate 401;

[0030] Start the cylinder 2 to drive the push-pull platform 301 to extend toward the side of the angle plate. The push-pull platform 301 exerts a linear push on the rear end of the rotating arm 501. Due to the structure of the No. 1 through slot 302 in the shape of an eight, the No. 1 clamping shaft 502 moves from one end in the No. 1 through slot 302 to the other end, thereby causing the rotating arm 501 to rotate with the shaft column 403 as the axis.

[0031] Subsequently, the front end of the rotating arm 501 rotates slightly above the slide groove 402, generating a thrust in the rotation direction on the No. 2 clamping shaft 602. Due to the limiting effect of the slide groove 402 and the moving space provided by the No. 2 through groove 503, the No. 2 clamping shaft 602 moves in the opposite direction along the slide groove 402, so that the pin head 601 approaches the two side wall panels of the angle plate and pushes into the corresponding pin hole to lock the angle plate.

[0032] Through the above steps, the rocker arm assembly carrying the pin lock assembly can be driven by cylinder 2 to slide the pin in the opposite direction from the groove of the angle plate to lock the side wall panels of the angle plate, which is convenient for application in the narrow space of the automated welding system. The locking effect is good, and no manual operation by workers is required, thereby reducing labor input costs, so as to solve the problem that it is troublesome to fix the welding angle plate on the workpiece due to the small operating space in the current automated welding system.

[0033] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of those skilled in the art without departing from the purpose of the present invention.

Claims

1. A sliding centering mechanism for a positioning pin, comprising a base (1); characterized in that: It also includes a cylinder (2), a push-pull assembly, a support assembly, a rocker assembly, and a pin lock assembly; the base (1) is fixedly mounted on the welding workbench by bolt fasteners, the cylinder (2) is mounted inside the base (1) and the piston rod of the cylinder (2) extends to the outside of the front end of the base (1), the front end of the piston rod of the cylinder (2) is fixedly mounted with the push-pull assembly, the support assembly located in front of the push-pull assembly is anchored on the welding workbench by bolts, a rocker assembly is arranged between the push-pull assembly and the support assembly, the rocker assembly has two rotatable Z-shaped rotating arms (501), the front end of the rotating arm (501) is provided with a pin lock assembly adapted to the pin hole on the workpiece angle plate, and the pin lock assembly is horizontally inserted into the pin hole from the inside of the notch of the angle plate to fix the angle plate.

2. A sliding centering mechanism for a positioning pin according to claim 1, characterized in that: The push-pull assembly comprises a push-pull platform (301) and a No. 1 through slot (302); the push-pull platform (301) is a hollow plate structure with an open front end, and the push-pull platform (301) is provided with two left-right symmetrical No. 1 through slots (302) at the upper and lower ends, respectively, and the two No. 1 through slots (302) on the same horizontal plane are in an eight-shaped structure with an intersection angle of 120 degrees.

3. A sliding centering mechanism for a positioning pin according to claim 2, characterized in that: The support platform assembly comprises a support plate (401), a slide groove (402), and a shaft column (403); the support plate (401) is arranged at the lower front side of the push-pull platform (301); a slide groove (402) perpendicular to the sliding direction of the push-pull platform (301) is provided on a side of the upper end of the support plate (401) away from the push-pull platform (301); and two shaft columns (403) opposite to each other are fixedly connected to a side of the upper end of the support plate (401) close to the push-pull platform (301).

4. A sliding centering mechanism for a positioning pin according to claim 3, characterized in that: The rocker arm assembly comprises a rotating arm (501), a first clamping shaft (502), and a second through slot (503); one end of the rotating arm (501) is located inside the push-pull platform (301), and the other end is located above the slide slot (402); a shaft hole sleeved on the outside of a corresponding shaft column (403) is provided at a middle bending part of the Z-shaped structure of the rotating arm (501); and a second through slot (503) is provided longitudinally through the rotating arm (501) at one end located above the slide slot (402).

5. A sliding centering mechanism for a positioning pin according to claim 4, characterized in that: The pin lock assembly comprises a pin head (601) and a second clamping shaft (602); one end of the pin head (601) is fixedly connected to a metal plate, a horizontal slot is provided at a part of the side wall of the rotating arm (501) above the slide groove (402), the metal plate is inserted into the horizontal slot, the upper and lower ends of the metal plate are fixedly connected to the second clamping shaft (602) inserted into the second through groove (503), and the second clamping shaft (602) at the lower end is slidably connected in the slide groove (402).

6. A sliding centering mechanism for a positioning pin according to claim 5, characterized in that: One end of the pin head (601) facing the edge of the support plate (401) is an arc-shaped protruding structure, and four arc-shaped inwardly concave notches are arranged around the outer wall of the arc-shaped protruding structure. A limiting column with a diameter larger than the diameter of the pin hole on the angle plate is arranged between the arc-shaped protruding structure and the metal plate.

7. A sliding centering mechanism for a positioning pin according to claim 6, characterized in that: A baffle (7) and a cover plate (8) are fixedly connected to the front end of the base (1); the baffle (7) covers the upper part of the rocker arm assembly and is located inside the notch of the angle plate; the cover plate (8) is located above the baffle (7) and has circular rubber-structured pressing plates (9) mounted on the left and right sides thereof against the upper edge of the angle plate.

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