A welding positioning structure for a structurally stable headrest assembly

Abstract

A welding positioning structure for a headrest assembly with a stable structure belongs to the technical field of welding positioning fixtures, and solves the problems of inaccurate positioning and loose clamping in the prior art, which lead to unqualified batch products. It includes a bottom plate, on which two groups of base support positioning blocks arranged symmetrically are arranged, and base positioning pins are arranged on the base support positioning blocks. The upper sides of the two groups of base support positioning blocks are provided with base upper rotating clamping mechanisms, and the lower sides of the base support positioning blocks are respectively provided with two base lower clamping mechanisms, and a lower catheter positioning mechanism is arranged between the two base lower clamping mechanisms, and an upper catheter positioning mechanism is arranged on the upper side of the base support positioning block. It has a reasonable design, a compact structure, and precise positioning. After manually pre-clamping the workpiece, it can be clamped by a cylinder. The positioning and clamping are stable, which effectively prevents quality defects caused by the reverse installation of the headrest catheter workpiece. It has strong practicality and high reliability in use.

Description

Technical Field

[0001] The utility model belongs to the technical field of welding positioning fixtures, and in particular relates to a welding positioning structure of a headrest component with a stable structure. Background Art

[0002] The headrest assembly is the key position for installing the headrest in the rear seat, and its welding positioning directly affects the accuracy of the headrest installation position. If there is a problem with the clamping positioning of the headrest assembly welding, it will cause the headrest position deviation, which will bring serious safety hazards and affect the comfort of the passenger's head. However, during the welding process of the current headrest assembly, there are generally problems with inaccurate positioning and loose clamping. Once there is a positioning deviation or the clamping is not in place, it will cause batch product problems. Therefore, it is necessary to improve the headrest assembly welding positioning device in the prior art. Utility Model Content

[0003] The utility model aims at solving the above problems and provides a kind of headrest assembly welding positioning structure with precise positioning, which can be clamped by a cylinder after manually pre-clamping the workpiece, and has stable positioning and clamping, and can effectively prevent quality defects caused by reverse installation of the headrest duct workpiece, has strong practicality and high reliability.

[0004] The technical solution adopted by the utility model is: the structurally stable headrest assembly welding positioning structure includes a base plate, characterized in that: two groups of base support positioning blocks arranged symmetrically on the left and right are arranged on the base plate, base positioning pins are respectively arranged on the base support positioning blocks, the headrest base workpiece is positioned and placed on the two groups of base support positioning blocks, and the upper sides of the two groups of base support positioning blocks are provided with laterally arranged base upper side rotating clamping mechanisms, two base lower side clamping mechanisms are respectively provided on the lower sides of the base support positioning blocks, a lower catheter positioning mechanism is provided between the two lower base clamping mechanisms and on the lower side of the base support positioning blocks, a catheter upper positioning mechanism is also provided on the upper side of the base support positioning block and at a position corresponding to the catheter lower positioning mechanism, and the headrest bracket workpiece and the headrest catheter workpiece to be welded are arranged between the catheter upper positioning mechanism and the catheter lower positioning mechanism.

[0005] The rotating clamping mechanism on the upper side of the base includes a rotating clamping shaft, which is arranged along the extension direction of the headrest base workpiece, one end of the rotating clamping shaft is hinged to the clamping shaft hinge seat, and the other end of the rotating clamping shaft is connected to the driving end of the rotating clamping cylinder on the upper side of the base through the clamping shaft connecting sleeve; two groups of contour-bending rotating clamping blocks are respectively arranged at both ends of the rotating clamping shaft, and the two groups of contour-bending rotating clamping blocks at each end are respectively arranged on the left and right sides of the positioning mechanism on the catheter; a clamping shaft pre-tightening handle is also provided on the contour-bending rotating clamping block. The rotating clamping shaft is driven to rotate by the clamping shaft pre-tightening handle, and then the contour-bending section on the upper side of the headrest base workpiece placed on the base support positioning block is pre-tightened by using the two groups of contour-bending rotating clamping blocks respectively arranged at both ends of the rotating clamping shaft; then, the rotating clamping cylinder on the upper side of the base is started to lock the rotating clamping shaft and the position of the contour-bending rotating clamping blocks thereon.

[0006] The base lower side clamping mechanism includes a base lower side clamping cylinder arranged vertically, a base lower side clamping swing rod is rotatably provided at the telescopic end of the upper part of the base lower side clamping cylinder, a rear end of the base lower side clamping swing rod is hinged with the telescopic end of the cylinder, a base lower side clamping block is provided at the front end of the base lower side clamping swing rod, and a swing connecting rod is hingedly provided at the middle part of the base lower side clamping swing rod, and a base lower side pre-tightening handle is also provided on the base lower side clamping swing rod. The base lower side pre-tightening handle is used to drive the base lower side clamping swing rod to swing, so that the base lower side clamping block provided at the front end of the base lower side clamping swing rod is used to pre-tighten the straight section of the lower side of the headrest base workpiece; then, the base lower side clamping cylinder is started to lock the base lower side clamping swing rod and the position of the base lower side clamping block on it.

[0007] The upper duct positioning mechanism comprises an upper duct positioning cylinder arranged obliquely downward, an upper positioning connection seat is provided at the telescopic end of the lower part of the upper duct positioning cylinder, both sides of the upper positioning connection seat are respectively slidably arranged on the upper positioning guide rail, and two groups of upper duct positioning guide blocks are provided at the front end of the upper positioning connection seat, and an upper positioning block pre-tightening handle is also provided on the upper positioning connection seat. The upper positioning connection seat is driven to reciprocate along the upper positioning guide rail by the upper positioning block pre-tightening handle, and then the upper ends of the two groups of headrest duct workpieces arranged on the upper side of the headrest bracket workpiece are positioned by using the two groups of upper duct positioning guide blocks at the front end of the upper positioning connection seat.

[0008] The upper side of the positioning guide block on the conduit is respectively provided with an anti-misalignment protrusion for preventing the headrest conduit workpiece from being installed upside down. The anti-misalignment protrusion on the upper side of the positioning guide block on the conduit can effectively prevent the headrest conduit workpiece from being installed upside down during the installation process.

[0009] The lower guide tube positioning mechanism comprises a lower guide tube positioning cylinder arranged obliquely upward, a lower guide tube connection seat is provided at the telescopic end of the upper part of the lower guide tube positioning cylinder, two sets of lower guide tube positioning guide blocks are provided at the front end of the lower guide tube connection seat, an L-shaped lower guide tube pre-tightening handle is rotatably provided on the cylinder body of the lower guide tube positioning cylinder, and the middle part of the lower guide tube pre-tightening handle is hinged to the lower guide tube connection seat through a connecting rod. The lower guide tube pre-tightening handle drives the lower guide tube connection seat to move, so that the lower ends of the two sets of headrest guide tube workpieces arranged on the upper side of the headrest bracket workpiece are positioned by using the two sets of lower guide tube positioning guide blocks at the front end of the lower guide tube connection seat.

[0010] The beneficial effects of the utility model are as follows: since the utility model adopts two groups of base support positioning blocks arranged symmetrically on the bottom plate, the base support positioning blocks are provided with base positioning pins, the upper sides of the two groups of base support positioning blocks are provided with laterally arranged base upper side rotation clamping mechanisms, the lower sides of the base support positioning blocks are respectively provided with two base lower side clamping mechanisms, a conduit lower positioning mechanism is provided between the two base lower side clamping mechanisms and on the lower side of the base support positioning blocks, and a conduit upper positioning mechanism is provided on the upper side of the base support positioning blocks and at a position corresponding to the conduit lower positioning mechanism, the utility model has a reasonable design, a compact structure, and precise positioning. After manually pre-clamping the workpiece, it can be clamped by a cylinder. The positioning and clamping are stable, which can effectively prevent quality defects caused by the reverse installation of the headrest conduit workpiece. The utility model has strong practicality and high reliability in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural schematic diagram of the utility model (the positioning and clamping structure on the upper right half of the bottom plate is not shown).

[0012] Figure 2 yes Figure 1 A-direction view.

[0013] Figure 3 yes Figure 1 A structural schematic diagram of the base lower side pressing mechanism, the catheter upper positioning mechanism and the catheter lower positioning mechanism.

[0014] Explanation of the serial numbers in the figure: 1 bottom plate, 2 rotating clamping mechanism on the upper side of the base, 3 base support positioning block, 4 rotating clamping shaft, 5 rotating clamping cylinder on the upper side of the base, 6 clamping shaft connecting sleeve, 7 clamping shaft hinge seat, 8 contour bending rotating clamping block, 9 clamping shaft pre-tightening handle, 10 clamping mechanism on the lower side of the base, 11 upper positioning mechanism of the catheter, 12 lower positioning mechanism of the catheter, 13 headrest base workpiece, 14 headrest bracket workpiece, 15 headrest catheter workpiece, 16 clamping cylinder on the lower side of the base, 17 clamping rocker rod on the lower side of the base, 18 clamping block on the lower side of the base, 19 pre-tightening handle on the lower side of the base, 20 positioning cylinder on the catheter, 21 upper positioning connecting seat, 22 upper positioning guide block on the catheter, 23 upper positioning guide rail, 24 upper positioning block pre-tightening handle, 25 lower positioning cylinder of the catheter, 26 lower positioning connecting seat, 27 lower positioning guide block of the catheter, 28 pre-tightening handle of the lower positioning block, 29 base positioning pin. DETAILED DESCRIPTION

[0015] according to Figures 1 to 3 The specific structure of the utility model is described in detail. The structurally stable headrest assembly welding positioning structure comprises a bottom plate 1, on which two groups of base support positioning blocks 3 are arranged symmetrically on the left and right, and base positioning pins 29 are respectively arranged on the base support positioning blocks 3. The headrest base workpiece 13 is positioned and placed on the base positioning pins 29 of the two groups of base support positioning blocks 3 through the positioning holes thereon, and the headrest bracket workpiece 14 is also positioned by using the positioning holes thereon to cooperate with the base positioning pins 29.

[0016] The upper side of the two groups of base support positioning blocks 3 is provided with a laterally arranged upper base rotating clamping mechanism 2, and the upper base rotating clamping mechanism 2 includes a rotating clamping shaft 4 arranged along the extension direction of the headrest base workpiece 13, one end of the rotating clamping shaft 4 is hinged to the clamping shaft hinge seat 7 fixedly arranged on the bottom plate 1, and the other end of the rotating clamping shaft 4 is connected to the driving end of the upper base rotating clamping cylinder 5 arranged on the bottom plate 1 through the clamping shaft connecting sleeve 6. The left and right ends of the rotating clamping shaft 4 are respectively provided with two groups of contoured bending rotating clamping blocks 8 for pressing the contoured bending section of the headrest base workpiece 13; and the two groups of contoured bending rotating clamping blocks 8 at each end are respectively arranged on the left and right sides of the positioning mechanism 11 on the catheter. The contoured bending rotating clamping block 8 is also provided with a clamping shaft pre-tightening handle 9. Then, the rotating clamping shaft 4 is driven to rotate through the clamping shaft pre-tightening handle 9, so as to utilize the two sets of contour-bending rotating clamping blocks 8 respectively arranged at the two ends of the rotating clamping shaft 4 to pre-tighten the contour-bending section on the upper side of the headrest base workpiece 13 placed on the base support positioning block 3; then, the rotating clamping cylinder 5 on the upper side of the base is started to lock the position of the rotating clamping shaft 4 and the contour-bending rotating clamping blocks 8 thereon.

[0017] Two base lower side clamping mechanisms 10 are also provided on the lower side of each group of base support positioning blocks 3. The base lower side clamping mechanism 10 includes a base lower side clamping cylinder 16 arranged vertically, and a base lower side clamping swing rod 17 is rotatably provided at the telescopic end of the upper part of the base lower side clamping cylinder 16, and the rear end of the base lower side clamping swing rod 17 is hinged with the telescopic end of the cylinder, and the front end of the base lower side clamping swing rod 17 is provided with a base lower side clamping block 18 for pressing and fixing the lower straight section of the headrest base workpiece 13, and a swing connecting rod is hingedly provided in the middle of the base lower side clamping swing rod 17. A base lower side pre-tightening handle 19 is also provided on the base lower side clamping swing rod 17. Thus, the base lower side pre-tightening handle 19 is utilized to drive the base lower side clamping swing rod 17 to swing, so that the base lower side clamping block 18 provided at the front end of the base lower side clamping swing rod 17 can be utilized to pre-tighten the straight section on the lower side of the headrest base workpiece 13; then, the base lower side clamping cylinder 16 is started to lock the base lower side clamping swing rod 17 and the position of the base lower side clamping block 18 thereon.

[0018] A lower conduit positioning mechanism 12 is provided between the two base lower side clamping mechanisms 10 at each end and on the lower side of the base support positioning block 3. The lower conduit positioning mechanism 12 includes a lower conduit positioning cylinder 25 arranged obliquely upward, a lower positioning connection seat 26 is provided at the telescopic end of the upper part of the lower conduit positioning cylinder 25, two groups of lower conduit positioning guide blocks 27 are provided at the front end of the lower positioning connection seat 26, an L-shaped lower positioning block pre-tightening handle 28 is rotatably provided on the cylinder body of the lower conduit positioning cylinder 25, and the middle part of the L-shaped lower positioning block pre-tightening handle 28 is hinged to the lower positioning connection seat 26 through a connecting rod; the lower positioning connection seat 26 is driven to move by the lower positioning block pre-tightening handle 28, so that the lower ends of the two groups of headrest conduit workpieces 15 arranged on the upper side of the headrest bracket workpiece 14 are positioned by using the two groups of lower conduit positioning guide blocks 27 at the front end of the lower positioning connection seat 26, and then the lower conduit positioning cylinder 25 is started to lock the position of the lower conduit positioning guide blocks 27.

[0019] An upper catheter positioning mechanism 11 is also provided on the upper side of the base support positioning block 3 and at a position corresponding to the lower catheter positioning mechanism 12 . The headrest bracket workpiece 14 and the headrest catheter workpiece 15 to be welded are both provided between the upper catheter positioning mechanism 11 and the lower catheter positioning mechanism 12 . The catheter upper positioning mechanism 11 includes a catheter upper positioning cylinder 20 arranged obliquely downward, and an upper positioning connecting seat 21 is provided at the telescopic end of the lower part of the catheter upper positioning cylinder 20. The two sides of the upper positioning connecting seat 21 are respectively slidably arranged on the upper positioning guide rail 23, and two groups of catheter upper positioning guide blocks 22 are provided at the front end of the upper positioning connecting seat 21. An upper positioning block pre-tightening handle 24 is also provided on the upper positioning connecting seat 21; the upper positioning connecting seat 21 is driven to reciprocate along the upper positioning guide rail 23 by the upper positioning block pre-tightening handle 24, and then the two groups of catheter upper positioning guide blocks 22 at the front end of the upper positioning connecting seat 21 are used to position the upper ends of the two groups of headrest catheter workpieces 15 arranged on the upper side of the headrest bracket workpiece 14, and then the catheter upper positioning cylinder 20 is started to lock the position of the catheter upper positioning guide block 22. In addition, the upper side of the positioning guide block 22 on the catheter is respectively provided with an anti-misalignment protrusion for preventing the headrest catheter workpiece 15 from being installed upside down. Then, the anti-misalignment protrusion on the upper side of the positioning guide block 22 on the catheter is used to effectively prevent the headrest catheter workpiece 15 from being installed upside down during the installation process.

[0020] When the structurally stable welding positioning structure of the headrest assembly is used, first, the headrest base workpiece 13 is placed on two sets of base support positioning blocks 3, and the headrest base workpiece 13 is positioned by using the positioning holes on the headrest base workpiece 13 and the base positioning pins 29 on the base support positioning blocks 3. Afterwards, the headrest bracket workpiece 14 is positioned and placed at the corresponding installation positions at both ends of the headrest base workpiece 13 through the base positioning pins 29 on the base support positioning blocks 3; and the two headrest conduit workpieces 15 are respectively mounted on the conduit upper positioning guide blocks 22 of the conduit upper positioning mechanism 11, and at the same time, the anti-dislocation protrusions on the conduit upper positioning guide blocks 22 are used to ensure the correct installation of the headrest conduit workpiece 15, effectively preventing the headrest conduit workpiece 15 from being installed upside down. After each workpiece is placed in place, the rotating pressing shaft 4 is driven to rotate through the pressing shaft pre-tightening handle 9, and then the two sets of contoured bending rotating pressing blocks 8 respectively arranged at both ends of the rotating pressing shaft 4 are used to pre-tighten the contoured bending section on the upper side of the headrest base workpiece 13 placed on the base support positioning block 3; and the base lower side pre-tightening handle 19 is used to drive the base lower side clamping swing rod 17 to swing, so as to pre-tighten the straight section on the lower side of the headrest base workpiece 13 through the base lower side clamping block 18 arranged at the front end of the base lower side clamping swing rod 17.

[0021] Then, the upper positioning block pre-tightening handle 24 is used to drive the upper positioning connecting seat 21 to move downward along the upper positioning guide rail 23, thereby driving the two groups of catheter upper positioning guide blocks 22 at the front end of the upper positioning connecting seat 21 and the headrest catheter workpiece 15 positioned thereon to move to the welding position; then, the lower positioning block pre-tightening handle 28 is used to drive the lower positioning connecting seat 26 to move, so as to utilize the two groups of catheter lower positioning guide blocks 27 at the front end of the lower positioning connecting seat 26 to position the lower ends of the two groups of headrest catheter workpieces 15 arranged on the catheter upper positioning mechanism 11. After each welding workpiece is positioned and pre-pressed, the upper rotating and pressing cylinder 5 of the base is started to lock the position of the rotating and pressing shaft 4 and the position of the profile bending rotating and pressing block 8 on it, the lower pressing cylinder 16 of the base is started to lock the position of the lower pressing swing rod 17 of the base and the lower pressing block 18 of the base, and the upper positioning cylinder 20 of the conduit and the lower positioning cylinder 25 of the conduit are started to respectively lock the position of the upper positioning guide block 22 of the conduit and the lower positioning guide block 27 of the conduit. After each welding workpiece is locked and fixed, the subsequent automatic welding is carried out.

Claims

1. A structurally stable headrest assembly welding positioning structure, comprising a base plate (1), characterized in that: The bottom plate (1) is provided with two groups of base support positioning blocks (3) arranged symmetrically on the left and right, and the base support positioning blocks (3) are respectively provided with base positioning pins (29). The headrest base workpiece (13) is positioned and placed on the two groups of base support positioning blocks (3), and the upper sides of the two groups of base support positioning blocks (3) are provided with a transversely arranged base upper side rotation clamping mechanism (2). The lower sides of the base support positioning blocks (3) are respectively provided with two base lower side clamping mechanisms (10), and a lower catheter positioning mechanism (12) is provided between the two base lower side clamping mechanisms (10) and on the lower side of the base support positioning blocks (3). A catheter upper positioning mechanism (11) is also provided on the upper side of the base support positioning block (3) and at a position corresponding to the catheter lower positioning mechanism (12). The headrest bracket workpiece (14) and the headrest catheter workpiece (15) to be welded are arranged between the catheter upper positioning mechanism (11) and the catheter lower positioning mechanism (12).

2. The structurally stable headrest assembly welding positioning structure according to claim 1, characterized in that: The rotating clamping mechanism (2) on the upper side of the base comprises a rotating clamping shaft (4), which is arranged along the extension direction of the headrest base workpiece (13), one end of the rotating clamping shaft (4) is hinged to the clamping shaft hinge seat (7), and the other end of the rotating clamping shaft (4) is connected to the driving end of the rotating clamping cylinder (5) on the upper side of the base through a clamping shaft connecting sleeve (6); two groups of contour-bending rotating clamping blocks (8) are respectively arranged at both ends of the rotating clamping shaft (4), and the two groups of contour-bending rotating clamping blocks (8) at each end are respectively arranged on the left and right sides of the positioning mechanism (11) on the catheter; and a clamping shaft pre-tightening handle (9) is also provided on the contour-bending rotating clamping block (8).

3. The structurally stable headrest assembly welding positioning structure according to claim 1, characterized in that: The base lower side clamping mechanism (10) comprises a base lower side clamping cylinder (16) arranged vertically, a base lower side clamping swing rod (17) is rotatably arranged at the telescopic end of the upper part of the base lower side clamping cylinder (16), a rear end of the base lower side clamping swing rod (17) is hinged to the telescopic end of the cylinder, a base lower side clamping block (18) is arranged at the front end of the base lower side clamping swing rod (17), a swing connecting rod is hingedly arranged at the middle part of the base lower side clamping swing rod (17), and a base lower side pre-tightening handle (19) is also arranged on the base lower side clamping swing rod (17).

4. The structurally stable headrest assembly welding positioning structure according to claim 1, characterized in that: The catheter upper positioning mechanism (11) comprises a catheter upper positioning cylinder (20) arranged obliquely downward, an upper positioning connection seat (21) is provided at the telescopic end of the lower part of the catheter upper positioning cylinder (20), two sides of the upper positioning connection seat (21) are respectively slidably arranged on the upper positioning guide rail (23), and two groups of catheter upper positioning guide blocks (22) are provided at the front end of the upper positioning connection seat (21), and an upper positioning block pre-tightening handle (24) is also provided on the upper positioning connection seat (21).

5. The structurally stable headrest assembly welding positioning structure according to claim 4, characterized in that: Anti-misalignment protrusions for preventing the headrest catheter workpiece (15) from being installed upside down are respectively provided on the upper sides of the positioning guide blocks (22) on the catheter.

6. The structurally stable headrest assembly welding positioning structure according to claim 1, characterized in that: The catheter lower positioning mechanism (12) comprises a catheter lower positioning cylinder (25) arranged obliquely upward, a lower positioning connection seat (26) being provided at the telescopic end of the upper portion of the catheter lower positioning cylinder (25), two groups of catheter lower positioning guide blocks (27) being provided at the front end of the lower positioning connection seat (26), an L-shaped lower positioning block pre-tightening handle (28) being rotatably provided on the cylinder body of the catheter lower positioning cylinder (25), and a middle portion of the lower positioning block pre-tightening handle (28) being hinged to the lower positioning connection seat (26) via a connecting rod.

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