Vehicle frame welding positioning mechanism

Abstract

The invention relates to the technical field of vehicle frame welding, and discloses a vehicle frame welding positioning mechanism which comprises a workbench, a welding mechanical arm arranged on the side edge of the workbench, an overturning frame arranged in the middle of the workbench and rotating relative to the workbench, a head pipe fixing mechanism and a side pipe fixing mechanism. The side pipe fixing mechanism comprises a supporting base slidably connected to the overturning frame, the side edge of the supporting base is fixedly connected with a guiding circular ring, the two sides of the guiding circular ring are slidably connected with guiding sliding bases, the supporting base is provided with a lifting driving assembly for adjusting the height of the guiding sliding bases, and the middle of each guiding sliding base is provided with an ejection assembly. A mounting plate is arranged at the extending end of the ejection assembly and rotationally connected with a rotating shaft, and a clamping assembly is arranged at the end, away from the center of the guide ring, of the rotating shaft. Through free adjustment of the position of the clamping assembly, motorcycle frames of different models can be effectively positioned on the premise that parts are not disassembled and assembled.

Description

Technical Field

[0001] The invention relates to the technical field of vehicle frame welding, in particular to a vehicle frame welding positioning mechanism. Background Art

[0002] The frame of a motorcycle usually uses round or oval tubes, which are equipped with a grid beam structure through welding or brazing processes. The structure is strong and the quality is light. Therefore, during the processing, it is usually necessary to fix different bent pipes and weld the joints of the bent pipes.

[0003] The existing welding equipment adopts a method of setting up multiple clamping components on a flat plate, and fixing different metal pipes through clamping components of different heights and angles. This results in that only fixed models of frames can be fixed on the fixing plate. When the frame model needs to be changed, the clamping components need to be disassembled and assembled, resulting in the entire positioning mechanism being cumbersome during use, and therefore it needs to be improved. Summary of the invention

[0004] The present invention provides a frame welding positioning mechanism, which solves the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A frame welding positioning mechanism comprises a workbench, a welding manipulator is arranged on the side of the workbench, a flip frame rotating relative to the workbench is arranged in the middle of the workbench, and also comprises a head pipe fixing mechanism and a side pipe fixing mechanism; the head pipe fixing mechanism comprises an end bracket arranged at the end of the flip frame, an end support is arranged on the end bracket, a flip support plate is arranged on the side of the end support close to the center of the workbench, a conical head is arranged on the flip support plate, and the conical head is detachably connected to the head pipe of the frame; the side pipe fixing mechanism comprises a supporting base slidably connected to the flip frame, a guide ring is fixedly connected to the side of the supporting base, guide slides are slidably connected to the two sides of the guide ring, a lifting drive assembly for adjusting the height of the guide slide is arranged on the supporting base, an ejection assembly is arranged in the middle of the guide slide, a mounting plate is arranged at the protruding end of the ejection assembly, the mounting plate is rotatably connected to a rotating shaft, a clamping assembly is arranged at the end of the rotating shaft away from the center of the guide ring, and the clamping assembly is fixedly connected to the side pipe of the frame.

[0007] As a preferred technical solution of the present invention, a cross bar is provided on the side of the flip frame, and a plurality of supporting bases are slidably connected to the cross bar. A clearance groove is provided in the middle of the workbench, and side panels are provided at both ends of the clearance groove. The ends of the side panels are rotatably connected to a main shaft fixedly connected to the end of the flip frame. A flip motor is provided on the workbench, and the output shaft of the flip motor is fixedly connected to a driving gear, and the driving gear is meshingly connected to a driven gear fixedly connected to the main shaft.

[0008] As a preferred technical solution of the present invention, the lifting drive assembly includes a guiding slide bar slidably connected to the support base. One end of the guiding slide bar away from the center of the guiding ring is fixedly connected to a support plate. The side surface of the support plate is rotatably connected to a support rod, and one end of the support rod away from the support plate is rotatably connected to a guiding slide seat. A suspension bracket is arranged on the support base, and a lifting lead screw is rotatably connected to the suspension bracket. A transverse movement nut is threadedly connected to the lifting lead screw, and a lifting push rod is rotatably connected to the transverse movement nut. One end of the lifting push rod away from the transverse movement nut is rotatably connected to the support plate.

[0009] As a preferred technical solution of the present invention, the ejection assembly includes an ejection lead screw threadedly connected to the middle of the guiding slide seat. One end of the ejection lead screw away from the guiding ring is rotatably connected to a mounting plate. Sliding rods fixedly connected to the mounting plate are slidably connected to both sides of the guiding slide seat. One end of the sliding rod close to the guiding ring is provided with a fixing plate rotatably connected to the ejection lead screw.

[0010] As a preferred technical solution of the present invention, a clamping disc is fixedly connected to the middle of the rotating shaft. A nut block is arranged on the side surface of the mounting plate. A clamping lead screw is threadedly connected to the nut block. One end of the clamping lead screw close to the clamping disc is rotatably connected to a clamping block cooperating with the clamping disc.

[0011] As a preferred technical solution of the present invention, the clamping assembly includes a mounting frame arranged at one end of the rotating shaft away from the center of the guiding ring. The middle parts of L-shaped clamping rods are rotatably connected to both ends of the mounting frame. Clamping seats are arranged at the ends of the L-shaped clamping rods, and clamping pieces are rotatably connected to the clamping seats. A clamping slide rod is slidably connected to the middle of the rotating shaft. A clamping push block cooperating with the L-shaped clamping rod is arranged at one end of the clamping slide rod away from the guiding ring. A limiting plate is arranged at one end of the clamping slide rod close to the guiding ring. A support plate is slidably connected to the middle of the clamping slide rod. A clamping spring is arranged between the push plate and the limiting plate. A cam cooperating with the push plate is rotatably connected to the side surface of the mounting plate.

[0012] As a preferred technical solution of the present invention, legs are arranged on the side surface of the end support. The end of the leg is rotatably connected to a flipping support plate. A screw rod is threadedly connected to the side surface of the end support. A support rod is rotatably connected to the end of the screw rod. One end of the support rod away from the screw rod is rotatably connected to the flipping support plate.

[0013] The present invention has the following beneficial effects:

[0014] By setting a guiding slider that slides along a guiding circular ring on a support base that moves horizontally left and right, the side tube of the frame can be fixed at different spatial positions and angles, meeting the requirement of fixing the steel tube obliquely during the welding process of the motorcycle frame. Moreover, the position of the clamping assembly can be freely adjusted. Without disassembling and assembling components, this mechanism can effectively position motorcycle frames of different models, facilitating the free adjustment of motorcycle frame models during the production process, reducing the switching time of production tasks, and making it more convenient to use. Brief Description of the Drawings

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0016] Figure 1 It is a schematic structural diagram of a frame welding positioning mechanism.

[0017] Figure 2 It is a front view of a frame welding positioning mechanism.

[0018] Figure 3 It is a schematic structural diagram of a workbench in a frame welding positioning mechanism.

[0019] Figure 4 It is a schematic structural diagram of a head tube fixing mechanism in a frame welding positioning mechanism.

[0020] Figure 5 It is a schematic structural diagram of a flipping frame in a frame welding positioning mechanism.

[0021] Figure 6 It is a schematic structural diagram of a side tube fixing mechanism in a frame welding positioning mechanism.

[0022] Figure 7 For Figure 6 left view.

[0023] Figure 8 It is a schematic structural diagram of the lower part of the support base in a frame welding positioning mechanism.

[0024] Figure 9 For Figure 6 front view.

[0025] Figure 10 It is a schematic structural diagram of an ejecting assembly in a frame welding positioning mechanism.

[0026] Figure 11It is a schematic structural diagram of the cooperation between the clamping block and the clamping disc in a frame welding positioning mechanism.

[0027] Figure 12 It is a schematic structural diagram of a clamping assembly in a frame welding positioning mechanism.

[0028] Figure 13 It is Figure 12 the front view of.

[0029] In the figure: 1, workbench; 2, welding manipulator; 3, flipping frame; 4, head tube fixing mechanism; 5, side tube fixing mechanism; 6, frame head tube; 7, frame side tube; 8, flipping motor; 9, driving gear; 10, driven gear; 11, side plate; 12, main shaft; 13, end bracket; 14, end support; 15, flipping support plate; 16, leg; 17, conical head; 18, screw; 19, support rod; 20, support base; 21, guiding ring; 22, guiding sliding seat; 23, lifting driving assembly; 24, mounting plate; 25, ejecting assembly; 26, rotating shaft; 27, clamping assembly; 28, guiding sliding rod; 29, support rod; 30, suspension bracket; 31, lifting lead screw; 32, transverse moving nut; 33, lifting push rod; 34, support plate; 35, fixing plate; 36, sliding rod; 37, ejecting lead screw; 38, nut block; 39, clamping lead screw; 40, clamping block; 41, clamping disc; 42, limiting plate; 43, clamping spring; 44, cam; 45, push plate; 46, mounting frame; 47, clamping sliding rod; 48, L-shaped clamping rod; 49, clamping seat; 50, clamping piece; 51, clamping push block. Specific embodiments

[0030] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0031] In one embodiment, please refer to Figures 1-13A frame welding positioning mechanism comprises a workbench 1, a welding manipulator 2 is arranged on the side of the workbench 1, and the welding manipulator 2 is arranged on the front and rear sides of the workbench 1. The frame is welded by the welding manipulator 2. A clearance groove is arranged in the middle of the workbench 1, and the left and right ends of the clearance groove are provided with side plates 11 fixedly connected to the workbench 1. The upper end of the side plate 11 is rotatably connected with a main shaft 12 arranged in a left and right direction. One end of the main shaft 12 close to the center of the workbench 1 is fixedly connected to the left and right ends of the flip frame 3, and a flip motor 8 is arranged at the left end of the workbench 1, and the output shaft of the flip motor 8 is fixedly connected to the driving gear 9, and the driving gear 9 is meshed and connected to the driven gear 10, and the driven gear 10 is fixedly connected to the left end of the main shaft 12 on the left side, so that the flip motor 8 can rotate the main shaft 12 by gear transmission, so that the flip frame 3 is flipped around the center of the main shaft 12, and also includes a head pipe fixing mechanism 4 and a side pipe fixing mechanism 5;

[0032] The head tube fixing mechanism 4 includes an end bracket 13 arranged at the left end of the flip frame 3, an end support 14 is arranged above the end bracket 13, a flip support plate 15 is arranged on the right side of the end support 14, and a cone head 17 is arranged on the upper surface of the flip support plate 15. The outside of the cone head 17 is detachably connected to the frame head tube 6. The frame head tube 6 can be inserted from top to bottom on the outside of the cone head 17 to complete the assembly process;

[0033] The side pipe fixing mechanism 5 includes a support base 20 slidably connected to the flipping frame 3. The flipping frame 3 includes three horizontal bars arranged from front to back and oriented left and right. Multiple support bases 20 are slidably connected to the middle of the horizontal bars. In this application, three support bases 20 are provided, and the appropriate number of support bases 20 can be selected according to the number of frame side pipes 7 to be welded actually and placed on the flipping frame 3. And guiding rings 21 are arranged on both the left and right sides of the flipping frame 3. The axis of the guiding ring 21 is parallel to that of the support base 20. Guiding sliders 22 arranged left and right are slidably connected to both the front and back sides of the guiding ring 21. The left and right ends of the guiding slider 22 are respectively slidably connected to two guiding rings 21 on the same support base 20. A lifting drive assembly 23 is arranged at the lower part of the support base 20. The lifting drive assembly 23 can push the guiding slider 22 to move up and down along the guiding ring 21, so as to change the height and orientation of the guiding slider 22. And an ejecting assembly 25 is arranged in the middle of the guiding slider 22. The ejecting assembly 25 is vertically arranged relative to the guiding slider 22. An installation plate 24 is arranged at the extending end of the ejecting assembly 25 away from the center of the guiding ring 21. The distance between the installation plate 24 and the guiding slider 22 is changed by the ejecting assembly 25. And a rotating shaft 26 is rotatably connected to the installation plate 24. A clamping assembly 27 is arranged at one end of the rotating shaft 26 away from the guiding ring 21. The clamping assembly 27 is detachably connected to the frame side pipe 7. By sliding the guiding slide bar 28 along the guiding ring 21 and controlling the position of the installation plate 24 by the ejecting assembly 25, the adjustment of the spatial position of the frame side pipe 7 is realized. And the orientation of the frame side pipe 7 is changed by the rotation of the rotating shaft 26 itself, so that the frame side pipe 7 can be fixed at different angles and positions in space, which is convenient for the head-to-tail connection between different frame side pipes 7, and thus convenient for subsequent end welding treatment.

[0034] In a case of this embodiment, the lifting drive assembly 23 includes guide slide rods 28 slidably connected to the left and right sides of the support base 20. The lower ends of the guide slide rods 28 are fixedly connected to the support plates 34. The two support plates 34 arranged front and back are respectively arranged on the left and right sides below the support base 20. A suspension bracket 30 arranged left and right is provided in the middle of the lower surface of the support base 20. The lower end of the suspension bracket 30 is rotatably connected to a lifting lead screw 31 arranged left and right. The left and right sides of the lifting lead screw 31 are threadedly connected with transverse nuts 32. The lower surface of the transverse nut 32 is rotatably connected to the upper end of a lifting push rod 33. The lower end of the lifting push rod 33 is rotatably connected to the middle of the upper surface of the support plate 34. The left and right sides of the lifting lead screw 31 are provided with threads with opposite helix directions. Therefore, when the lifting lead screw 31 rotates, the two transverse nuts 32 move closer to each other or move away from each other. The two transverse nuts 32 drive the support plate 34 to move up and down through the lifting push rod 33. The lower ends of the support rods 29 are rotatably connected to the front and back sides of the upper surface of the support plate 34. The upper ends of the support rods 29 are rotatably connected to the guide slide seats 22. Therefore, when the support plate 34 moves up and down, the guide slide rods 28 can be pushed to move along the guide ring 21 through the support rods 29. Through holes are provided on the support base 20, and the support rods 29 penetrate and connect to the through holes. When an operator rotates the lifting lead screw 31, the guide slide seats 22 can be driven to move up and down along the guide ring 21.

[0035] In a case of this embodiment, the ejection assembly 25 includes an ejection lead screw 37 threadedly connected to the middle of the guide slide seat 22. The ejection lead screw 37 is perpendicular to the guide slide seat 22. One end of the ejection lead screw 37 away from the center of the guide ring 21 is rotatably connected to the middle of the mounting plate 24. The left and right ends of the mounting plate 24 are fixedly connected to one ends of the sliding rods 36 away from the center of the guide ring 21. The middle parts of the sliding rods 36 are slidably connected to the left and right sides of the guide slide seat 22. One ends of the sliding rods 36 close to the center of the guide ring 21 are fixedly connected to the left and right ends of the fixing plate 35. The middle of the fixing plate 35 is rotatably connected to one side of the ejection lead screw 37 close to the center of the guide ring 21. Therefore, when the ejection lead screw 37 rotates, the ejection lead screw 37 can push the mounting plate 24 to move away from or close to the guide slide seat 22 relative to each other, realizing the processing of spacing adjustment.

[0036] In a case of this embodiment, a clamping disc 41 is fixedly connected to the middle of the rotating shaft 26. A nut block 38 is arranged on the side surface of the mounting plate 24. The nut block 38 is threadedly connected with a clamping lead screw 39. One end of the clamping lead screw 39 close to the clamping disc 41 is rotatably connected to a clamping block 40 cooperating with the clamping disc 41. The clamping block 40 is made of anti-slip rubber material. Therefore, after the clamping lead screw 39 presses the clamping block 40 against the outside of the clamping disc 41, the rotating shaft 26 will be locked. Therefore, when fixing the vehicle frame side tube 7, first adjust the orientation of the vehicle frame side tube 7. After the adjustment is completed, the vehicle frame side tube 7 can be fixed by tightening the clamping lead screw 39.

[0037] In one case of this embodiment, the clamping assembly 27 includes a mounting bracket 46 disposed at one end of the rotating shaft 26 away from the center of the guiding ring 21. The mounting bracket 46 is of a U-shaped structure. The middle parts of L-shaped clamping rods 48 are rotatably connected to the left and right ends of the mounting bracket 46. A clamping seat 49 is provided at one end of the L-shaped clamping rod 48 away from the mounting bracket 46. The clamping seat 49 is rotatably connected to a clamping piece 50. The two clamping pieces 50 are oppositely arranged. The side surface of the vehicle frame side tube 7 is fixed by the clamping piece 50. A clamping slide rod 47 is slidably connected to the middle of the rotating shaft 26. The end of the clamping slide rod 47 away from the center of the guiding ring 21 is fixedly connected to the middle of a clamping push block 51. When the clamping slide rod 47 moves towards the center of the guiding ring 21, the left and right ends of the clamping push plate 45 contact the ends of the L-shaped clamping rods 48 close to the guiding ring 21. At this time, the ends of the two L-shaped clamping rods 48 close to the guiding ring 21 are separated from each other, so that the ends of the L-shaped clamping rods 48 away from the guiding ring 21 approach each other, that is, the two clamping pieces 50 approach each other, and the clamping pieces 50 are pressed against the surface of the vehicle frame side tube 7 to complete the fixing process. A limiting plate 42 is provided at the end of the clamping slide rod 47 close to the center of the guiding ring 21. A push plate 45 is slidably connected to the side of the clamping slide rod 47 close to the limiting plate 42. A clamping spring 43 is provided between the push plate 45 and the limiting plate 42. The clamping spring 43 is sleeved outside the clamping slide rod 47. Cams 44 cooperating with the push plate 45 are rotatably connected to the front and rear sides of the mounting plate 24. Therefore, when the convex part of the cam 44 rotates to a state in which it fits with the push plate 45, the cam 44 will push the push plate 45 towards the direction of the limiting plate 42. The push plate 45 pushes the limiting plate 42 towards the center direction of the guiding ring 21 through the clamping spring 43. At this time, the clamping slide rod 47 moves towards the guiding ring 21, and finally the L-shaped clamping rods 48 approach each other to achieve the clamping process, that is, the fixing process of the clamping piece 50 to the vehicle frame side tube 7 is realized.

[0038] In one case of this embodiment, a leg 16 is provided at the lower right side of the end support 14. The right end of the leg 16 is rotatably connected to the lower left side of the flipping support plate 15. A screw rod 18 is threadedly connected above the end support 14. The right end of the screw rod 18 is rotatably connected to the left end of a support rod 19. The right end of the support rod 19 is rotatably connected to the upper left side of the flipping support plate 15. Thus, the flipping support plate 15 is pushed to rotate around the leg 16 by the screw rod 18 to adjust the angle of the tapered head 17, that is, to adjust the fixing angle of the vehicle frame head tube 6.

[0039] During the implementation of this embodiment, legs 16 are provided below the workbench 1, so that the workbench 1 remains stable during the welding process, and the flipping motor 8 and the welding manipulator 2 are powered.

[0040] The frame head tube 6 is fixed. Rotate the screw rod 18. The screw rod 18 drives the flipping support plate 15 to rotate forward and flip, thereby adjusting the pitching orientation of the tapered head 17. After stopping the rotation of the screw rod 18, take out the frame head tube 6 that needs to be welded, and insert the frame head tube 6 from top to bottom outside the tapered head 17. At this time, the fixation of the frame head tube 6 is completed.

[0041] The frame side tube 7 is fixed. Rotate the cam 44. The cam 44 disengages from the push plate 45. At this time, the L-shaped clamping rod 48 separates from the clamping push block 51. The L-shaped clamping rod 48 can rotate freely at this time. Take out the frame side tube 7 that needs to be fixed to the frame head tube 6 and place it between the two clamping pieces 50 on the leftmost side. Rotate the cam 44 in the reverse direction. The clamping pieces 50 fix the frame side tube 7. Move the leftmost support base 20 horizontally left and right, and rotate the lifting screw rod 31. The guiding sliding seat 22 slides up and down along the guiding ring 21, and the distance between the mounting plate 24 and the guiding sliding seat 22 can also be adjusted by rotating the ejecting screw rod 37. Finally, the frame side tube 7 contacts the frame head tube 6 at the target angle and position. After the adjustment is completed, tighten the clamping screw rod 39 so that the inclination angle of the frame side tube 7 is fixed. The above steps are used to fix different frame side tubes 7 in sequence.

[0042] Welding process. The welding robot 2 welds the contact surface between the frame head tube 6 and the frame side tube 7. During the welding process, the entire flipping frame 3 is rotated by the flipping motor 8, thereby increasing the welding freedom and facilitating the welding process of the welding robot 2.

[0043] After welding the outside, rotate the cam 44 in the reverse direction. The clamping disc 41 disengages from the frame side tube 7. At this time, the frame side tube 7 and the frame head tube 6 have formed a complete frame, and the entire frame can be taken out from bottom to top. If the same model of frame needs to be welded later, the position and height of the mounting plate 24 and the inclination angle of the clamping assembly 27 do not need to be adjusted. Just put in the new frame side tube 7 and frame head tube 6, and lock the clamping pieces 50 to perform the subsequent welding process. If frames of different models need to be welded, the fixing position can be re-adjusted according to the above steps for fixing the frame side tube 7 and the frame head tube 6.

[0044] The present invention is applicable to a frame welding positioning mechanism. By arranging a guiding sliding seat 22 that slides along a guiding circular ring 21 on a supporting base 20 that moves horizontally left and right, the side tubes 7 of the frame can be fixed at different spatial positions and angles, meeting the requirement of inclined fixing of steel tubes during the welding process of the motorcycle frame. Moreover, the position of the clamping assembly 27 can be freely adjusted. Without disassembling and assembling components, this mechanism can effectively position motorcycle frames of different models, facilitating the free adjustment of motorcycle frame models during the production process, reducing the switching time of production tasks, and making it more convenient to use.

[0045] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-described exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be encompassed within the present invention.

Claims

1. A frame welding positioning mechanism, comprising a workbench (1), a welding manipulator (2) is arranged on the side of the workbench (1), characterized in that: A turning frame (3) is arranged in the middle of the workbench (1) and is rotatable relative to the workbench (1), and also includes a head pipe fixing mechanism (4) and a side pipe fixing mechanism (5); The head pipe fixing mechanism (4) comprises an end bracket (13) arranged at the end of the flip frame (3), an end support (14) being arranged on the end bracket (13), a flip support plate (15) being arranged on one side of the end support plate (14) close to the center of the workbench (1), a conical head (17) being arranged on the flip support plate (15), and the conical head (17) being detachably connected to the frame head pipe (6); The side tube fixing mechanism (5) comprises a support base (20) slidably connected to the flip frame (3); the side of the support base (20) is fixedly connected to the guide ring (21); the two sides of the guide ring (21) are slidably connected to the guide slide (22); the support base (20) is provided with a lifting drive assembly (23) for adjusting the height of the guide slide (22); the middle of the guide slide (22) is provided with an ejection assembly (25); the protruding end of the ejection assembly (25) is provided with a mounting plate (24); the mounting plate (24) is rotatably connected to a rotating shaft (26); the end of the rotating shaft (26) away from the center of the guide ring (21) is provided with a clamping assembly (27); the clamping assembly (27) is fixedly connected to the side tube (7) of the frame.

2. A frame welding positioning mechanism according to claim 1, characterized in that: A cross bar is arranged on the side of the flip frame (3), and a plurality of support bases (20) are slidably connected to the cross bar. A clearance groove is arranged in the middle of the workbench (1), and side plates (11) are arranged at both ends of the clearance groove. The ends of the side plates (11) are rotatably connected to a main shaft (12) fixedly connected to the end of the flip frame (3). A flip motor (8) is arranged on the workbench (1), and the output shaft of the flip motor (8) is fixedly connected to a driving gear (9), and the driving gear (9) is meshedly connected to a driven gear (10) fixedly connected to the main shaft (12).

3. A frame welding positioning mechanism according to claim 1, characterized in that: The lifting drive assembly (23) comprises a guide slide bar (28) slidably connected to the support base (20); one end of the guide slide bar (28) away from the center of the guide ring (21) is fixedly connected to the support plate (34); the side of the support plate (34) is rotatably connected to the support bar (29); and one end of the support bar (29) away from the support plate (34) is rotatably connected to the guide slide seat (22).

4. A frame welding positioning mechanism according to claim 3, characterized in that: The support base (20) is provided with a suspension frame (30), the suspension frame (30) is rotatably connected to a lifting screw rod (31), the lifting screw rod (31) is threadedly connected to a transverse nut (32), the transverse nut (32) is rotatably connected to a lifting push rod (33), and one end of the lifting push rod (33) away from the transverse nut (32) is rotatably connected to a support plate (34).

5. The frame welding positioning mechanism according to claim 1, characterized in that: The ejection assembly (25) comprises an ejection screw (37) threadedly connected to the middle part of the guide slide (22); one end of the ejection screw (37) away from the guide ring (21) is rotatably connected to the mounting plate (24); sliding rods (36) fixedly connected to the mounting plate (24) are slidably connected to both sides of the guide slide (22); and a fixed plate (35) rotatably connected to the ejection screw (37) is provided at one end of the sliding rod (36) close to the guide ring (21).

6. A frame welding positioning mechanism according to claim 1, characterized in that: A clamping disk (41) is fixedly connected to the middle of the rotating shaft (26), a nut block (38) is arranged on the side of the mounting plate (24), the nut block (38) is threadedly connected to a clamping screw (39), and one end of the clamping screw (39) close to the clamping disk (41) is rotatably connected to a clamping block (40) that cooperates with the clamping disk (41).

7. A frame welding positioning mechanism according to claim 1, characterized in that: The clamping assembly (27) comprises a mounting frame (46) arranged at one end of the rotating shaft (26) away from the center of the guide ring (21), the two ends of the mounting frame (46) are rotatably connected to the middle part of an L-shaped clamping rod (48), the end of the L-shaped clamping rod (48) is provided with a clamping seat (49), and the clamping seat (49) is rotatably connected to a clamping piece (50).

8. A frame welding positioning mechanism according to claim 7, characterized in that: The middle part of the rotating shaft (26) is slidably connected with a clamping slide rod (47), and the end of the clamping slide rod (47) away from the guide ring (21) is provided with a clamping push block (51) that cooperates with the L-shaped clamping rod (48), and the end of the clamping slide rod (47) close to the guide ring (21) is provided with a limit plate (42), the middle part of the clamping slide rod (47) is slidably connected with a support plate (34), a clamping spring (43) is provided between the push plate (45) and the limit plate (42), and the side of the mounting plate (24) is rotatably connected with a cam (44) that cooperates with the push plate (45).

9. The frame welding positioning mechanism according to claim 1, characterized in that: A leg (16) is provided on the side of the end support (14), and the end of the leg (16) is rotatably connected to the flip support plate (15). A screw rod (18) is threadedly connected to the side of the end support (14), and the end of the screw rod (18) is rotatably connected to a support rod (19), and one end of the support rod (19) away from the screw rod (18) is rotatably connected to the flip support plate (15).

Images