Flexible clamping and conveying linkage mechanism for motorcycle frame welding station

Abstract

The invention relates to the technical field of motorcycle frame machining, in particular to a flexible clamping and conveying linkage mechanism for a motorcycle frame welding station, which comprises a mounting seat, a rotating seat is arranged at the top of the mounting seat, a driving rotating rod is arranged at the top of the rotating seat, and a connecting block fixedly sleeves the outer surface of the driving rotating rod. The two positioning seats are respectively provided with a frame placing station; the top surface of the mounting seat is also provided with a positioning table; the clamping assembly is arranged above the two mounting plates; and the two synchronous adjusting assemblies are arranged above the positioning table. Compared with the prior art, the clamping assembly is arranged to be matched with the synchronous adjusting assembly to form an angle-action linkage link, the rotating shaft and the rotating plate are driven through a driving gear and a driven gear, and the rotating angle is accurately converted into a progressive sequence of pre-clamping, full-clamping, pressure maintaining, pre-loosening and full-loosening of the clamp; and rigid synchronization of rotary table movement and clamping opening and closing is realized.

Description

Technical Field

[0001] This invention relates to the field of motorcycle frame processing technology, and in particular to a flexible clamping and conveying linkage mechanism for a motorcycle frame welding station. Background Technology

[0002] In motorcycle frame welding production, the frame is generally composed of multiple tubular and stamped parts, which are positioned, tack-fixed, and then continuously welded with multiple weld seams on a special tooling. Existing production lines are generally equipped with dual-station or multi-station turntable / slide / chain conveyor mechanisms, with each station equipped with tooling fixtures corresponding to the motorcycle model for conveying or transferring the components during welding.

[0003] In the prior art, Chinese patent document CN108177950B, "A Quick and Effortless Chassis Tilting Device," proposes using the eccentric principle to achieve tilting by utilizing the chassis's own weight. This results in a lightweight chassis tilting device structure, significantly reduced investment, and ensured operability, achieving convenient and effortless chassis tilting and a green and environmentally friendly working effect. However, consistent with traditional methods, traditional structures often employ a separate design where "the conveyor mechanism is responsible for handling and repositioning, and each tooling independently performs clamping / releasing." The specific process is usually as follows: after the conveyor moves the tooling to the loading / unloading position, the operator places the chassis in the first or second placement area or on the positioning reference, and then triggers multiple clamps one by one through a manual button, foot valve, or independent pneumatic valve island. The components are clamped; only when the clamping signals at each location meet the interlocking conditions of the control system can the workstation be moved to the welding position or the welding program be started; after welding is completed, the operator needs to release the clamps one by one before unloading or moving to the next process. However, this mode has several limitations: First, the conveying and clamping sequence is sequential, making it impossible to complete pre-clamping and pressure holding during the rotation process, resulting in a long and fluctuating cycle time; Second, it relies on manual multi-point operation, which is prone to errors such as incomplete clamping and accidental release, leading to weld misalignment, dimensional deviations, and safety risks; Third, although the two workstations are formally opposed, it is difficult to achieve true parallelism between the clamping side and the welding side, and the rotation time is not effectively utilized. Therefore, this application discloses a flexible clamping and conveying linkage mechanism for a motorcycle frame welding station. Summary of the Invention

[0004] In view of this, the purpose of this invention is to propose a flexible clamping and conveying linkage mechanism for motorcycle frame welding stations, so as to solve the problems of traditional motorcycle frame welding stations where the conveying and clamping are sequential, requiring manual locking or unlocking at multiple points one by one, resulting in long and fluctuating cycle times, easy occurrence of errors such as failure to clamp / accidental release and safety hazards, and low parallel efficiency.

[0005] To achieve the above objectives, the present invention provides a flexible clamping and conveying linkage mechanism for a motorcycle frame welding station, comprising a mounting base, a rotating seat on the top of the mounting base, a driving rotating rod on the top of the rotating seat, a connecting block fixedly sleeved on the outer surface of the driving rotating rod, positioning seats on both sides of the connecting block, a frame placement station on each of the two positioning seats, the two frame placement stations being arranged axially symmetrically, a mounting plate on the top of the frame placement station, a first placement seat on one side of the mounting plate, and a second placement seat on the other side, the first placement seat and the second placement seat being used to place the frame body to be processed, and a positioning platform on the top surface of the mounting base; A clamping assembly is disposed above the two mounting plates. The clamping assembly is used to simultaneously clamp the frame body when the frame body is rotated and transported to the processing area by the rotating seat and the drive rotating rod. Two synchronous adjustment components are disposed above the positioning table. The synchronous adjustment components are used to adjust the opening and closing state of the clamping components during the rotation of the rotating seat and the driving rotating rod driving the connecting block and the positioning seat to rotate. During the process of the rotating seat and the driving rotating rod driving the connecting block and the positioning seat to rotate and reset, the clamping assembly that rotates to the processing area is synchronously clamped and limited under the action of the synchronous adjustment assembly, while the clamping assembly that rotates and conveys away from the processing area is synchronously released from the limit under the action of the synchronous adjustment assembly.

[0006] Preferably, the clamping assembly includes clamping seats fixedly mounted on the two mounting plates. The clamping seats are U-shaped, with a mounting plate on the top of the clamping seats. A rotating rod is rotatably mounted on the bottom center of the mounting plate. A drive plate is fixedly sleeved on the outer surface of the rotating rod on the side away from the mounting plate. Two sets of slide rails are respectively provided on the bottom sides of the mounting plate, with two slide rails in each set. A first sliding seat is rotatably mounted on both slide rails. Drive connecting rods are rotatably mounted on both sides of the drive plate. The two drive connecting rods are rotatably mounted to the two first sliding seats respectively. A vertical block is provided on both sides of the top surface of the first sliding seat, and a clamping block is rotatably mounted on the top of the vertical block.

[0007] Preferably, when the rotating rod rotates, the rotating rod drives the two first sliding seats to move closer to each other through the drive plate and drive connecting rod, and the clamping block clamps the frame body.

[0008] Preferably, a torsion spring is provided at the rotatable connection between the upright block and the clamping block. The clamping block is arranged in a rotary shape, and clamping wheels are rotatably mounted at both ends of the clamping block. When the first sliding seats approach each other, one of the clamping wheels on the clamping block contacts the frame body first. As the two first sliding seats continue to approach each other, the other clamping wheel is pushed to rotate and synchronously contacts the frame body to clamp. After the two first sliding seats move away from each other, the clamping block drives the two clamping wheels to reset under the action of the torsion spring.

[0009] Preferably, the synchronous adjustment assembly includes two positioning plates fixedly installed on the positioning platform, the two positioning plates being arranged opposite each other. A rotating shaft is rotatably installed in the middle of the positioning plates, and a rotating plate is fixedly sleeved on the top of the rotating shaft. A sliding groove is provided on one side of the rotating plate, and a second sliding seat is rotatably installed on one side of the positioning plate. A drive rod is slidably installed on the second sliding seat, and the sliding groove is slidably installed on one side of the second sliding seat. A first connecting rod is rotatably installed at one end of the drive rod, and one side of the first connecting rod is slidably installed inside the positioning seat. A second connecting rod is rotatably installed at the other end of the first connecting rod, and one side of the second connecting rod is slidably installed at the bottom of the mounting plate. A rotating gear is fixedly sleeved on the side of the rotating rod near the mounting plate, and a drive gear plate that meshes with the second connecting rod is provided on one side of the second connecting rod.

[0010] Preferably, when the drive rod deflects and moves, it drives the first connecting rod to slide, causing the second connecting rod to slide inside the mounting plate, thereby driving the drive tooth plate to move and driving the rotating gear to rotate, and synchronously driving the clamping blocks to move closer to each other for clamping.

[0011] Preferably, the top surface of the positioning plate is also provided with a C-shaped travel limiting groove, and one side of the rotating plate is slidably installed inside the travel limiting groove. The travel limiting groove is used to control the deflection angle of the drive rod.

[0012] Preferably, a drive gear is fixedly sleeved on the top surface of the drive rotating rod, and a driven gear is provided at the bottom of each rotating shaft. The two driven gears are respectively located on both sides of the drive gear, and the driven gears mesh with the drive gear.

[0013] Preferably, the rotatable connection between the first linkage rod and the second linkage rod is configured as a rotating rod, and the rotating rod passes through the positioning seat and the mounting plate. The positioning seat and the mounting plate are provided with a through groove adapted to the rotating rod, and a sealing telescopic plate that moves with the rotating rod is provided on the through groove. The sealing telescopic plate is used to seal the through groove.

[0014] Preferably, the rotating base is configured as a forward and reverse stepper motor, used to drive the connecting block and the positioning base to reciprocate within a 180-degree stroke.

[0015] The beneficial effects of this invention are: 1. This type of flexible clamping and conveying linkage mechanism for motorcycle frame welding stations, through the setting of clamping components and synchronous adjustment components, forms an "angle-action" linkage link. The driving gear and driven gear drive the rotating shaft and rotating plate, and then through the sliding groove, the second sliding seat, the driving rod, the first / second connecting rod, the driving tooth plate and the rotating gear, the rotation angle is accurately converted into the progressive sequence of "pre-clamping-full clamping-pressure holding-pre-loosening-full loosening" of the clamp. This achieves rigid synchronization between the turntable movement and the clamping opening and closing, so that it automatically clamps and holds pressure when entering the welding area and automatically releases when leaving the welding area, eliminating the need for manual button locking / unlocking, reducing misoperation and waiting time, significantly shortening the cycle time and improving consistency. Dual-station axisymmetry and 180° indexing enable clamping and welding to be performed in parallel, improving OEE; C-shaped stroke limit grooves limit the action range and avoid malfunctions in transition angles; short force chain, high rigidity, good centering, stable clamping and positioning repeatability, enhanced resistance to thermal drift during welding, and overall achieve a highly reliable, low-maintenance, and easily interlocked automated linkage process.

[0016] 2. This type of flexible clamping and conveying linkage mechanism for motorcycle frame welding stations utilizes a torsion spring, a rotary clamping block, and clamping wheels on the clamping assembly. The torsion spring is integrated into the rotating joint of the vertical block and clamping block, and the clamping block is rotary with clamping wheels at both ends, forming a rolling progressive clamping mechanism of "one point first, then two points": when the first sliding seat approaches, one side roller contacts and guides the workpiece; as it continues to approach, the other side roller is forced to rotate and simultaneously presses against the workpiece, forming a two-point constraint. The clamping process uses rolling instead of sliding, significantly reducing impact peaks and surface friction, protecting the coating and thin-walled tubing, and preventing chipping and misalignment. The torsion spring provides preload and return force, ensuring no self-loosening under vibration and rapid reset during the release phase, reducing jamming and shortening idle time. The rollers are wear parts that can be quickly replaced, making maintenance simple and cost-effective. This compliant-self-centering characteristic can accommodate certain clamping tolerances and welding thermal deformation, maintaining stable clamping force and consistent positioning, improving weld geometric accuracy and appearance quality, while delaying mechanism wear and improving long-term reliability.

[0017] 3. This type of motorcycle frame welding station uses a flexible clamping and conveying linkage mechanism. By incorporating a through-slot and a sealing telescopic plate within the synchronous adjustment component, the rotational connection of the first and second linkage rods utilizes a rotating rod arrangement that penetrates the positioning seat and mounting plate. This, combined with the matching through-slot, provides swing angle and stroke space, resulting in a straight force chain, precise alignment, and higher rigidity. This reduces gaps and accumulated errors in multi-stage supports, thereby improving clamping response and repeatability. The through-slot is covered by a moving sealing telescopic plate, forming a dynamic sealing barrier. This barrier prevents welding slag, dust, and spatter from entering the slide rail, tooth surface, and guide cavity throughout the entire stroke, maintaining lubrication, reducing abrasive wear, significantly extending the lifespan of the guide rail, tooth plate, and rotating parts, and reducing cleaning and maintenance frequency. Simultaneously, the sealing plate blocks movement gaps, reducing the risk of accidental contact injury and inhibiting jamming caused by foreign object intrusion, improving equipment safety and availability. Overall, the through-type force transmission and dynamic sealing balance precision maintenance and environmental adaptability, ensuring long-term stable operation and consistent high-quality welding. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for this invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the planar structure of the present invention; Figure 3 This is a schematic diagram of the position structure of the synchronous adjustment component of the present invention; Figure 4 This is a bottom view schematic diagram of the synchronous adjustment component of the present invention; Figure 5 This is a schematic diagram of the operating structure of the synchronous adjustment component and the clamping component of the present invention; Figure 6 This is a schematic diagram of the synchronous adjustment component and clamping component of the present invention; Figure 7 This is a partial structural diagram of the synchronous adjustment component and clamping component of the present invention; Figure 8 For the present invention Figure 7 Enlarged structural diagram at point A in the middle; Figure 9 This is a bottom view of the clamping assembly of the present invention; Figure 10 This is a schematic diagram of the rotating gear and drive gear plate structure of the present invention; Figure 11 This is a partial structural diagram of the synchronization adjustment component of the present invention; Figure 12 This is a schematic diagram of the operating state of the synchronization adjustment component of the present invention.

[0020] The diagram is marked as follows: 1. Mounting base; 2. Rotating base; 3. Drive rotating rod; 4. Connecting block; 5. Positioning base; 6. Mounting plate; 7. First placement base; 8. Second placement base; 9. Chassis body; 10. Clamping base; 11. Mounting plate; 12. Rotating rod; 13. Drive plate; 14. Slide rail; 15. First sliding base; 16. Drive connecting rod; 17. Vertical block; 18. Clamping block; 19. Clamping wheel; 20. Positioning platform; 21. Positioning plate; 22. Rotating shaft; 23. Driven gear; 24. Drive gear; 25. Second sliding base; 26. Stroke limit groove; 27. Rotating plate; 28. Drive rod; 29. ​​First connecting rod; 30. Second connecting rod; 31. Rotating gear; 32. Drive gear plate; 33. Sliding groove; 34. Sealing telescopic plate. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments.

[0022] It should be noted that, unless otherwise defined, the technical or scientific terms used in this invention should have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "first," "second," and similar terms used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0023] like Figures 1 to 12As shown, a flexible clamping and conveying linkage mechanism for a motorcycle frame welding station includes a mounting base 1, a rotating base 2 on the top of the mounting base 1, a drive rotating rod 3 on the top of the rotating base 2, a connecting block 4 fixedly sleeved on the outer surface of the drive rotating rod 3, positioning seats 5 on both sides of the connecting block 4, and frame placement stations on the two positioning seats 5 respectively. The two frame placement stations are arranged axially symmetrically. A mounting plate 6 is provided on the top of the frame placement station. A first placement seat 7 is provided on one side of the mounting plate 6, and a second placement seat 8 is provided on the other side. The first placement seat 7 and the second placement seat 8 are used to place the frame body 9 to be processed. A positioning platform 20 is also provided on the top surface of the mounting base 1. A clamping assembly is provided above the two mounting plates 6 and is used to clamp the frame body 9 when it is welded. When the rotating seat 2 and the drive rotating rod 3 rotate and transport to the processing area, they synchronously clamp the frame body 9. Two synchronous adjustment components are set above the positioning table 20. The synchronous adjustment components are used to adjust the opening and closing state of the clamping components during the rotation of the rotating seat 2, the drive rotating rod 3, the connecting block 4, and the positioning seat 5. When the rotating seat 2 and the drive rotating rod 3 drive the connecting block 4 and the positioning seat 5 to rotate and reset, the clamping components that rotate to the processing area are synchronously clamped and limited under the action of the synchronous adjustment components. When the clamping components that rotate and transport away from the processing area are synchronously released under the action of the synchronous adjustment components, the rotating seat 2 is set as a forward and reverse stepper motor to drive the connecting block 4 and the positioning seat 5 to reciprocate within a stroke of 180 degrees. When the equipment is in standby mode, the station on the loading / unloading side of the two symmetrical workstations remains fully unclamped. The operator places the frame body 9 on the first placement seat 7 and the second placement seat 8 and triggers the start. The rotating seat 2 is driven by the forward and reverse stepper motors to drive the rotating rod 3 to rotate and transport it. Before entering the processing area, the synchronous adjustment component pre-clamps it, and then it is fully clamped and pressure is maintained, immediately meeting the interlocking conditions for welding start. At the same time, the station on the other side where welding is completed begins to gradually loosen with the angle to release thermal stress and prevent the workpiece from rebounding, until it returns to the loading / unloading position and the limit is completely released. The whole process connects "rotation - clamping / loosening - welding / loading / unloading" into a continuous action that evolves with the angle, which reduces manual operation and waiting, and reduces welding deformation and error accumulation through rigid positioning and progressive clamping, achieving stable dimensional consistency and higher cycle efficiency.

[0024] like Figures 1 to 3 , Figures 5 to 9As shown, the clamping assembly includes a clamping seat 10 fixedly mounted on two mounting plates 6. The clamping seat 10 is U-shaped. A mounting plate 11 is provided on the top of the clamping seat 10. A rotating rod 12 is rotatably mounted on the bottom center of the mounting plate 11. A drive plate 13 is fixedly sleeved on the outer surface of the rotating rod 12 away from the mounting plate 11. Two sets of slide rails 14 are provided on the bottom sides of the mounting plate 11. Each set of slide rails 14 has two slides. A first sliding seat 15 is rotatably mounted on both slide rails 14. A drive connecting rod 16 is rotatably mounted on both sides of the drive plate 13. The two drive connecting rods 16 are rotatably mounted to the two first sliding seats 15 respectively. A vertical block 17 is provided on both sides of the top surface of the first sliding seat 15. A clamping block 18 is rotatably mounted on the top of the vertical block 17. When the rotating rod 12 rotates, the rotating rod 12 drives the two first sliding seats 15 to move closer to each other through the drive plate 13 and the drive connecting rod 16. The clamping block 18 clamps the frame body 9. When the workstation rotates into the synchronous clamping section, the drive from the synchronous adjustment component is transmitted to the rotating rod 12 via the mechanism, causing it to rotate at a predetermined angle. The rotating rod 12 drives the drive plate 13 to pull the two drive connecting rods 16 in both directions with equal amount, thereby pushing the two first sliding seats 15 to move symmetrically closer along the slide rail 14. The clamping block 18 on the upright block 17 then adheres to the frame reference surface and forms a self-centering clamp. After reaching the set clamping stroke, a small amount of angle input is continued to establish pressure holding, ensuring the constraint rigidity during the welding process. When the workstation leaves the processing section, the rotating rod 12 rotates in the opposite direction, the first sliding seats 15 separate symmetrically, and the clamping block 18 retracts to a safe distance. The whole process is symmetrical, with short force chains and self-centering, which not only improves the positioning accuracy and weld consistency, but also reduces the stress accumulation and wear of the fixture after heating. A torsion spring is provided at the rotatable connection between the upright block 17 and the clamping block 18. The clamping block 18 is arranged in a rotary shape, and clamping wheels 19 are rotatably installed at both ends of the clamping block 18. When the first sliding seats 15 approach each other, one of the clamping wheels 19 on the clamping block 18 contacts the frame body 9 first. When the two first sliding seats 15 continue to approach each other, the other clamping wheel 19 is pushed to rotate and synchronously contacts the frame body 9 to clamp. After the two first sliding seats 15 move away from each other, the clamping block 18 drives the two clamping wheels 19 to return to their original positions under the action of the torsion spring. As the first sliding seat 15 approaches symmetrically, the clamping block 18 maintains a suitable posture under the preload of the torsion spring. First, the clamping wheel 19 on one side lightly touches the frame body 9 to achieve guidance and alignment. Then, as it continues to approach, the clamping wheel 19 on the other side is forced to rotate and presses against the workpiece simultaneously to form a two-point constraint, ultimately achieving the set clamping force and clamping stroke. Since the contact is rolling and progressive, it can effectively absorb clamping deviations and reduce instantaneous impact forces, thereby avoiding pushing the workpiece off-center or causing dents. After welding, when the sliding seat separates, the torsion spring drives the clamping block 18 to quickly return to the center and resets both clamping wheels 19 together, keeping the mechanism clean and preventing semi-suspended jamming caused by vibration. Overall, while ensuring positioning accuracy, it significantly reduces the impact of surface damage and thermal deformation coupling. The rotating pair of the upright block 17 and the clamping block 18 has a built-in torsion spring, which provides return force and micro-preload to prevent accidental loosening caused by vibration. The reset is quick and reliable, and the rollers are easily replaceable parts that can be quickly replaced according to the wear cycle, making maintenance simple.

[0025] like Figures 2 to 8 , Figures 10 to 12 As shown, the synchronous adjustment assembly includes two positioning plates 21 fixedly mounted on the positioning platform 20. The two positioning plates 21 are arranged opposite each other. A rotating shaft 22 is rotatably mounted in the middle of the positioning plate 21. A rotating plate 27 is fixedly sleeved on the top of the rotating shaft 22. A sliding groove 33 is opened on one side of the rotating plate 27. A second sliding seat 25 is rotatably mounted on one side of the positioning plate 21. A drive rod 28 is slidably mounted on the second sliding seat 25. The sliding groove 33 is slidably mounted inside one side of the second sliding seat 25. A first connecting rod 29 is rotatably mounted on one end of the drive rod 28. One side of the first connecting rod 29 is slidably mounted inside one side of the positioning seat 5. A second connecting rod 30 is rotatably mounted on the other end of the first connecting rod 29. One side of the second connecting rod 30 is slidably mounted on the bottom of the mounting plate 11. A rotating rod 12 is fixedly sleeved on the side near the mounting plate 11. There is a rotating gear 31, and a drive gear plate 32 that meshes with the second connecting rod 30 is provided on one side of the second connecting rod 30. When the drive rod 28 deflects and moves, it drives the first connecting rod 29 to slide and drive the second connecting rod 30 to slide inside the mounting plate 11, thereby driving the drive gear plate 32 to move and drive the rotating gear 31 to rotate. It synchronously drives the clamping blocks 18 to move closer to each other and clamp them. The top surface of the positioning plate 21 is also provided with a C-shaped stroke limit groove 26. One side of the rotating plate 27 is slidably installed inside the stroke limit groove 26. The stroke limit groove 26 is used to control the deflection angle of the drive rod 28. The top surface of the drive rotating rod 3 is fixedly sleeved with a drive gear 24. The bottom of the rotating shaft 22 is provided with a driven gear 23. The two driven gears 23 are respectively provided on both sides of the drive gear 24, and the driven gears 23 and the drive gear 24 mesh with each other. When the rotating seat 2 drives the rotating rod 3 to rotate, the driving gear 24 on its top surface meshes with the driven gears 23 on both sides, causing the rotating shaft 22 to rotate synchronously. The rotating plate 27 at the upper end of the rotating shaft 22 rotates accordingly, causing the second sliding seat 25 on one side to undergo controlled offset along the sliding groove 33 on the rotating plate 27. This, in turn, pushes the driving rod 28 to produce a deflection and linear component of a limited amplitude. This displacement is guided by the first connecting rod 29 inside the positioning seat 5 and by the second connecting rod 30 at the bottom of the mounting plate 11, converting the linear motion into the reciprocating motion of the driving toothed plate 32. The toothed plate meshes with the rotating gear 31, thereby causing the rotating rod 12 of the clamping assembly to rotate according to an angular curve and achieve "pre-clamping - full clamping - pressure holding" (its driving stroke is as follows). Figure 12 (Processes from I to III) or "Pre-pressure holding - pre-relaxation - full relaxation" (its drive stroke is as follows) Figure 12 The progressive timing of the process from III to I; the double-sided symmetrical driven gear 23 makes the timing of the two stations completely consistent, but the workflow is one after the other. This multi-level link of "angle drive - limited output - gear and rack transmission" ensures the rigidity of the action, repeatability and anti-interference ability, while eliminating the need for external air source or complex sensor closed loop, making maintenance simple and interlocking clear. The rotating connection between the first linkage 29 and the second linkage 30 is set as a rotating rod, and the rotating rod passes through the positioning seat 5 and the mounting plate 6. The positioning seat 5 and the mounting plate 6 are provided with a through groove adapted to the rotating rod, and a sealing telescopic plate 34 that moves with the rotating rod is provided on the through groove. The sealing telescopic plate 34 is used to seal the through groove. When the synchronous adjustment component drives the first linkage rod 29 and the second linkage rod 30 to perform a compound motion of angle and line, the rotational connection position adopts a rotating rod structure that passes through the positioning seat 5 and the mounting plate 6. The required stroke and swing angle are provided by the through groove that cooperates with it. The outer sealing telescopic plate 34 moves synchronously with the rotating rod to achieve full-process coverage and sealing. When driving, the force is directly applied from the rotating rod to the internal tooth plate and the rotating shaft 22. The path is short, the rigidity is high, and the alignment is good, which makes the clamping action response faster and the repeatability more accurate. At the same time, the seal inhibits the intrusion of welding slag and dust, delays the wear of the guide rail and tooth surface, keeps lubrication and clean, reduces the frequency of maintenance and improves long-term stability and operational safety.

[0026] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the invention (including the claims) is limited to these examples; within the framework of the invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in the details for the sake of brevity.

[0027] This invention is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A flexible clamping and conveying linkage mechanism for a motorcycle frame welding station, characterized in that, include: Mounting base (1), the top of the mounting base (1) is provided with a rotating base (2), the top of the rotating base (2) is provided with a driving rotating rod (3), the outer surface of the driving rotating rod (3) is fixedly sleeved with a connecting block (4), both sides of the connecting block (4) are provided with positioning bases (5), the two positioning bases (5) are respectively provided with a frame placement station, the two frame placement stations are arranged axially symmetrically, the top of the frame placement station is provided with a mounting plate (6), one side of the mounting plate (6) is provided with a first placement seat (7), the other side is provided with a second placement seat (8), the first placement seat (7) and the second placement seat (8) are used to place the frame body (9) to be processed, the top surface of the mounting base (1) is also provided with a positioning platform (20). A clamping assembly is disposed above the two mounting plates (6). The clamping assembly is used to simultaneously clamp the frame body (9) when the frame body (9) is rotated and transported to the processing area by the rotating seat (2) and the drive rotating rod (3). Two synchronous adjustment components are arranged above the positioning table (20). The synchronous adjustment components are used to adjust the opening and closing state of the clamping components during the rotation of the rotating seat (2) and the driving rotating rod (3) driving the connecting block (4) and the positioning seat (5) to rotate. During the process of the rotating seat (2) and the driving rotating rod (3) driving the connecting block (4) and the positioning seat (5) to rotate and reset, the clamping assembly that rotates to the processing area is synchronously clamped and limited under the action of the synchronous adjustment assembly, while the clamping assembly that rotates and leaves the processing area is synchronously released from the limit under the action of the synchronous adjustment assembly.

2. The flexible clamping and conveying linkage mechanism for motorcycle frame welding station according to claim 1, characterized in that, The clamping assembly includes clamping seats (10) fixedly mounted on two mounting plates (6). The clamping seats (10) are U-shaped. A mounting plate (11) is provided on the top of the clamping seat (10). A rotating rod (12) is rotatably mounted on the bottom center of the mounting plate (11). A drive plate (13) is fixedly sleeved on the outer surface of the rotating rod (12) away from the mounting plate (11). Two sets of slide rails (14) are provided on the bottom sides of the mounting plate (11). Each set of slide rails (14) has two slide rails. A first sliding seat (15) is rotatably mounted on both slide rails (14). A drive connecting rod (16) is rotatably mounted on both sides of the drive plate (13). The two drive connecting rods (16) are rotatably mounted on the two first sliding seats (15). A stand (17) is provided on both sides of the top surface of the first sliding seat (15). A clamping block (18) is rotatably mounted on the top of the stand (17).

3. The flexible clamping and conveying linkage mechanism for motorcycle frame welding station according to claim 2, characterized in that, When the rotating rod (12) rotates, the rotating rod (12) drives the two first sliding seats (15) to move closer to each other through the driving plate (13) and the driving connecting rod (16), and the clamping block (18) clamps the frame body (9).

4. The flexible clamping and conveying linkage mechanism for motorcycle frame welding station according to claim 3, characterized in that, A torsion spring is provided at the rotatable connection between the upright block (17) and the clamping block (18). The clamping block (18) is arranged in a rotary shape. Both ends of the clamping block (18) are rotatably mounted with clamping wheels (19). When the first sliding seats (15) approach each other, one of the clamping wheels (19) on the clamping block (18) first contacts the frame body (9). When the two first sliding seats (15) continue to approach each other, the other clamping wheel (19) is pushed to rotate and synchronously contacts the frame body (9) for clamping. After the two first sliding seats (15) move away from each other, the clamping block (18) drives the two clamping wheels (19) to reset under the action of the torsion spring.

5. The flexible clamping and conveying linkage mechanism for motorcycle frame welding station according to claim 2, characterized in that, The synchronous adjustment assembly includes two positioning plates (21) fixedly installed on the positioning platform (20). The two positioning plates (21) are arranged opposite to each other. A rotating shaft (22) is rotatably installed in the middle of the positioning plate (21). A rotating plate (27) is fixedly sleeved on the top of the rotating shaft (22). A sliding groove (33) is opened on one side of the rotating plate (27). A second sliding seat (25) is rotatably installed on one side of the positioning plate (21). A drive rod (28) is slidably installed on the second sliding seat (25). The sliding groove (33) is slidably installed inside one side of the second sliding seat (25). One end of the drive rod (28) is rotatably mounted with a first connecting rod (29), one side of the first connecting rod (29) is slidably mounted on the inside side of the positioning seat (5), the other end of the first connecting rod (29) is rotatably mounted with a second connecting rod (30), one side of the second connecting rod (30) is slidably mounted on the bottom of the mounting plate (11), the rotating rod (12) is fixedly sleeved with a rotating gear (31) on the side near the mounting plate (11), and one side of the second connecting rod (30) is provided with a drive tooth plate (32) that meshes with the second connecting rod (30).

6. The flexible clamping and conveying linkage mechanism for motorcycle frame welding station according to claim 5, characterized in that, When the drive rod (28) deflects and moves, it drives the first connecting rod (29) to slide and cause the second connecting rod (30) to slide inside the mounting plate (11), thereby driving the drive tooth plate (32) to move and drive the rotating gear (31) to rotate, and synchronously driving the clamping blocks (18) to move closer to each other for clamping.

7. The flexible clamping and conveying linkage mechanism for motorcycle frame welding station according to claim 6, characterized in that, The top surface of the positioning plate (21) is also provided with a C-shaped travel limit groove (26). One side of the rotating plate (27) is slidably installed inside the travel limit groove (26). The travel limit groove (26) is used to control the deflection angle of the drive rod (28).

8. The flexible clamping and conveying linkage mechanism for motorcycle frame welding station according to claim 5, characterized in that, The top surface of the drive rotating rod (3) is fixedly fitted with a drive gear (24), and the bottom of the rotating shaft (22) is provided with a driven gear (23). The two driven gears (23) are respectively located on both sides of the drive gear (24), and the driven gears (23) mesh with the drive gear (24).

9. The flexible clamping and conveying linkage mechanism for motorcycle frame welding station according to claim 5, characterized in that, The first connecting rod (29) and the second connecting rod (30) are connected by a rotating rod, and the rotating rod passes through the positioning seat (5) and the mounting plate (6). The positioning seat (5) and the mounting plate (6) are provided with a through groove that is compatible with the rotating rod, and a sealing telescopic plate (34) that moves with the rotating rod is provided on the through groove. The sealing telescopic plate (34) is used to seal the through groove.

10. The flexible clamping and conveying linkage mechanism for motorcycle frame welding station according to claim 1, characterized in that, The rotating seat (2) is configured as a forward and reverse stepper motor, which drives the connecting block (4) and the positioning seat (5) to reciprocate within a 180-degree stroke.

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