Triangular welding strip torsion correction device
By designing a triangular welding strip torsion correction device, a probe is used to detect the welding strip orientation and correct the welding strip orientation, which solves the problem of inconsistent welding surfaces caused by triangular welding strip torsion, improves welding quality and production efficiency, and enhances the automation level of photovoltaic modules.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- TRINA SOLAR CO LTD
- Filing Date
- 2025-08-27
- Publication Date
- 2026-07-21
Smart Images
Figure CN224530188U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of photovoltaic module welding, and in particular to a triangular welding strip torsion correction device. Background Technology
[0002] In the production of photovoltaic modules, triangular welding ribbons are key components for connecting solar cells. Triangular welding ribbons typically have three sides, one of which is the welding surface and needs to be oriented in a specific direction to be correctly welded to the main busbars of the solar cell. However, in actual production and use, triangular welding ribbons are prone to twisting during transportation, storage, and conveying. Furthermore, with the development of N-type cells and super-multiple busbar (SMBB) technology, the ribbon diameter has been further refined to below 0.2mm, significantly reducing its torsional resistance and exacerbating the difficulty of controlling welding precision.
[0003] Although there has been considerable research on optimizing the solder strip structure, such as using a layered coating process to reduce deformation caused by solder flow through a combination of a high-melting-point protective layer and a low-melting-point welding layer, or designing segmented solder strips, these solutions mainly focus on improving the shape and coating of the solder strip, and lack effective means to suppress torsional stress caused by temperature gradients or external forces in the welding process.
[0004] Currently, the orientation of the welding surface of triangular weld strips is mainly determined by visual inspection, followed by manual adjustment of the weld strip direction. This method is not only inefficient but also prone to human error, especially in large-scale production environments, and cannot meet the requirements of high-efficiency and high-precision production.
[0005] Furthermore, existing detection and repair technologies are significantly lagging behind. EL inspection mainly relies on offline sampling, AI vision lacks sensitivity to micron-level offsets and has a high false detection rate, and local heating repair is only suitable for slight torsion and may cause secondary damage. Most detection methods are based on optical recognition principles, which are highly dependent on ambient light and have difficulty adapting to solder strips of different colors and surface conditions, making it difficult to guarantee detection accuracy.
[0006] Furthermore, while some existing automated equipment can cut the solder strip, it cannot simultaneously solve the torsion problem, still requiring manual intervention to correct the solder strip orientation. This not only increases the number of production steps but also reduces production efficiency, affecting the consistency and quality stability of battery modules. Utility Model Content
[0007] The purpose of this invention is to provide a triangular welding strip torsion correction device to solve the problem of inconsistent welding surface orientation caused by the torsion of the triangular welding strip in the prior art.
[0008] To solve the above-mentioned technical problems, this utility model provides a triangular welding strip torsion correction device, comprising:
[0009] A welding strip feeding mechanism is used to convey triangular welding strips;
[0010] A clamping and cutting mechanism is provided at the discharge end of the welding strip feeding mechanism for clamping and cutting the triangular welding strip output from the welding strip feeding mechanism;
[0011] A torsion correction mechanism is located downstream of the clamping and cutting mechanism and is used to torsion correct the orientation of the triangular welding strip;
[0012] A traction mechanism, located at the outlet end of the torsion correction mechanism, is used to grab the triangular welding strip after it has been cut and torsion corrected, and pull the triangular welding strip through the torsion correction mechanism.
[0013] Furthermore, the clamping and cutting mechanism includes a first fixed clamp, a movable clamp, and a second fixed clamp arranged along the conveying direction of the triangular welding strip; the first fixed clamp and the second fixed clamp are fixedly arranged, the movable clamp is arranged between the first fixed clamp and the second fixed clamp, and the movable clamp can move relative to the first fixed clamp and the second fixed clamp; the first fixed clamp, the second fixed clamp, and the movable clamp cooperate with each other to clamp, cut, and deliver the triangular welding strip.
[0014] Furthermore, the movable fixture includes a download block, an upper pressure block fixed above the download block, an upper cutting block mounted on the upper pressure block, a cutter mounted on the upper cutting block, and a lower cutting block mounted on the download block, with a channel for the triangular welding strip to pass through formed between the upper cutting block and the lower cutting block.
[0015] Furthermore, the cutting edge of the cutter forms an angle with the horizontal plane.
[0016] Furthermore, the included angle ranges from 5 to 30 degrees.
[0017] Furthermore, the torsion correction mechanism includes a guide component with a through hole and a detection component fixed to the inner wall of the through hole. The guide component is used to provide a guide path, and the detection component is used to detect the orientation of the triangular weld strip by measuring the resistance difference between the reflective slope of the triangular weld strip and the contact surface, thereby determining the position of the welding surface.
[0018] Furthermore, the guiding component includes a disk with a triangular through hole, and the detection component includes a plurality of probes disposed on the inner wall of the through hole, the probes being respectively mounted on the three inner walls of the triangular through hole through a retractable support structure.
[0019] Furthermore, the traction mechanism includes a gripper and a drive component for moving the gripper, the gripper being used to clamp the cut short triangular welding strip.
[0020] Furthermore, it also includes a coaxial rod, which is fixed below the first fixed clamp and the movable clamp, and is arranged parallel to the first fixed clamp and the movable clamp.
[0021] Furthermore, it also includes a support component, located downstream of the torsion correction mechanism, for receiving and placing the torsion-corrected triangular welding strip, and the drive component of the traction mechanism is also located on the support component.
[0022] Compared with the prior art, the present invention has at least the following beneficial effects:
[0023] The triangular welding strip torsion correction device proposed in this utility model takes the triangular welding strip conveyed by the welding strip feeding mechanism, clamps and cuts it by the clamping and cutting mechanism, corrects the orientation of the triangular welding strip by the torsion correction mechanism, and pulls the triangular welding strip to correct the deviation by the traction mechanism, thereby realizing the function of automatic torsion correction of the triangular welding strip, so that the welding surface of the triangular welding strip is aligned, improving the welding quality and production efficiency of photovoltaic modules.
[0024] Furthermore, the triangular welding strip torsion correction device uses probes to measure the resistance values between different surfaces to determine the position of the welding surface, and uses a physical structure to torsion and correct the triangular welding strip. The structure is simple and reliable, the detection is accurate, and no manual intervention is required, which greatly improves the automation level of the production line. Attached Figure Description
[0025] Figure 1 This is a schematic diagram of the triangular welding strip torsion correction device in one embodiment of the present invention;
[0026] Figure 2 This is a three-dimensional schematic diagram of a portion of the triangular welding strip torsion correction device in one embodiment of the present invention;
[0027] Figure 3 This is a three-dimensional schematic diagram of a portion of the triangular welding strip torsion correction device in one embodiment of the present invention from another angle.
[0028] Figure 4 A schematic diagram of the movable clamp;
[0029] Figure 5 This is a schematic diagram of the torsion correction mechanism in one embodiment of the present invention.
[0030] Reference numerals: 1. Welding strip feeding mechanism; 2. First fixed clamp; 3. Moving clamp; 31. Lowering block; 32. Upper pressure block; 33. Upper cutting block; 34. Cutting knife; 35. Lower cutting block; 4. Triangular welding strip; 5. Torsion correction mechanism; 6. Second fixed clamp; 7. Clamping jaw; 8. Bearing component; 9. Coaxial rod; 10. Probe. Detailed Implementation
[0031] Based on the teachings of this specification, those skilled in the art can form new technical solutions by combining different implementation methods without creating technical contradictions. Such variations should be considered to fall within the protection scope of this patent.
[0032] The following is a more detailed description of a triangular welding strip torsion correction device of the present invention with reference to the schematic diagram, which illustrates a preferred embodiment of the present invention. It should be understood that those skilled in the art can modify the present invention described herein while still achieving the advantageous effects of the present invention. Therefore, the following description should be understood as being of general knowledge to those skilled in the art and is not intended to limit the present invention.
[0033] The present invention will be described in more detail below by way of example with reference to the accompanying drawings. The advantages and features of the present invention will become clearer from the following description. It should be noted that the drawings are in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of the present invention.
[0034] Example 1
[0035] like Figures 1 to 5 As shown in the figure, this embodiment proposes a triangular welding strip torsion correction device, including a welding strip feeding mechanism 1, a clamping and cutting mechanism, a torsion correction mechanism 5, and a traction mechanism.
[0036] Specifically, the welding strip feeding mechanism 1 is used to convey the triangular welding strip 4; the clamping and cutting mechanism is located at the output end of the welding strip feeding mechanism 1, and is used to clamp and cut the triangular welding strip 4 output from the welding strip feeding mechanism 1; the torsion correction mechanism 5 is located downstream of the clamping and cutting mechanism, and is used to torsion correct the orientation of the triangular welding strip 4; the traction mechanism is located at the output end of the torsion correction mechanism 5, and is used to grab the cut and torsion corrected triangular welding strip 4, and pull the triangular welding strip 4 through the torsion correction mechanism 5. The triangular welding strip torsion correction device accurately identifies the torsion state of the triangular welding strip 4 through the torsion correction mechanism 5, and achieves automatic correction by combining the pulling of the traction mechanism. The structure is simple and reliable, requires no manual intervention, and can adapt to the torsion requirements of triangular welding strips 4 of different specifications.
[0037] In this embodiment, the clamping and cutting mechanism includes a first fixed clamp 2, a movable clamp 3, and a second fixed clamp 6 arranged along the conveying direction of the triangular welding strip 4. The first fixed clamp 2 and the second fixed clamp 6 are fixedly arranged to clamp and fix the triangular welding strip 4. The distance between the first fixed clamp 2 and the second fixed clamp 6 can be adjusted according to actual needs. The movable clamp 3 is arranged between the first fixed clamp 2 and the second fixed clamp 6. The movable clamp 3 can move relative to the first fixed clamp 2 and the second fixed clamp 6. By controlling the moving distance of the movable clamp 3, the extension length of the triangular welding strip 4 can be precisely controlled. The first fixed clamp 2, the second fixed clamp 6, and the movable clamp 3 cooperate to clamp, cut, and deliver the triangular welding strip 4, ensuring that the welding surface of the triangular welding strip 4 is always correctly aligned with the battery cell, thereby improving welding accuracy, stability, and efficiency, while also effectively reducing welding defects and improving welding quality.
[0038] In this embodiment, as Figure 4 As shown, the movable clamp 3 includes a download block 31, an upper pressure block 32 fixed above the download block 31, an upper cutting block 33 mounted on the upper pressure block 32, a cutter 34 mounted on the upper cutting block 33, and a lower cutting block 35 mounted on the download block 31. A channel for the triangular welding strip 4 to pass through is formed between the upper cutting block 33 and the lower cutting block 35. The download block 31 serves as the basic component of the movable clamp 3, providing support and a mounting platform. The upper pressure block 32, fixed above the download block 31, serves to fix and support the upper cutting block 33. The upper cutting block 33, mounted on the upper pressure block 32, cooperates with the lower cutting block 35 to perform clamping and cutting functions. The channel formed between the upper cutting block 33 and the lower cutting block 35 can stably clamp the triangular welding strip 4, preventing the triangular welding strip 4 from shifting or shaking during delivery and cutting.
[0039] In this embodiment, the cutting edge of the cutter 34 forms an angle with the horizontal plane, allowing the cutter 34 to cut into the triangular weld strip 4 more quickly. Compared to a vertical cutting edge, the oblique cutting method can significantly reduce the deformation of the triangular weld strip 4 during the cutting process and can also more effectively reduce the force required during the cutting process, thereby improving cutting efficiency.
[0040] In addition, the cutting edge tilt direction can be adjusted to tilt to the left or right according to the welding strip feeding direction to adapt to the layout requirements of different production lines.
[0041] In this embodiment, the included angle ranges from 5 to 30 degrees. A 5-degree included angle can significantly improve the cutting effect. Compared to a vertical cutting edge (90 degrees), even a smaller included angle can reduce stress concentration during the cutting process, reducing deformation and damage to the triangular welding strip 4. A 30-degree included angle is large enough in practical applications, effectively dispersing the cutting force while avoiding insufficient contact area between the cutter and the welding strip due to an excessively large included angle, thus affecting cutting stability. Preferably, the included angle is 15 degrees. A 15-degree included angle can well adapt to the special shape of the triangular welding strip 4, especially when cutting bevels, it can better fit the geometry of the triangular welding strip 4, reducing damage and deformation during the cutting process.
[0042] In this embodiment, as Figure 5 As shown, the torsion correction mechanism 5 includes a guide member with a through hole, which is used to provide a guide path.
[0043] Specifically, the guide component includes a disc with a triangular through hole, and multiple gear grooves are provided on the outer periphery of the disc. The drive gear of the external drive mechanism (not shown) meshes with the gear grooves to drive the disc to rotate, thereby adjusting the orientation of the triangular welding strip 4.
[0044] The torsion correction mechanism 5 also includes a detection component fixed to the inner wall of the through hole. The detection component is used to detect the orientation of the triangular welding strip 4 by measuring the resistance difference between the reflective inclined surface and the contact surface of the triangular welding strip 4, thereby determining the position of the welding surface.
[0045] Specifically, the detection component includes multiple probes 10 disposed on the inner wall of the through hole. The probes 10 are respectively mounted on the three inner walls of the triangular through hole via a retractable support structure. The shape of the triangular through hole matches the cross-section of the triangular welding strip 4, allowing the triangular welding strip 4 to pass through smoothly. The end of each probe 10 can contact the surface of the triangular welding strip 4 via the retractable support structure. The retractable support structure can be a spring, a pneumatic structure, or other structure that enables the probe 10 to extend and retract within a certain range, allowing it to contact each surface of the triangular welding strip 4 when measuring its resistance. When not measuring or after measurement, it can retract into the disk without affecting the conveying of the triangular welding strip 4 after twisting.
[0046] Furthermore, since the reflective bevel of the triangular welding strip 4 is coated during preparation to improve reflectivity, and the welding surface is coated with a highly conductive coating to increase conductivity when welding with the battery grid lines, the resistance values of different surfaces are different. Therefore, the welding surface can be accurately identified by utilizing the difference in resistance between different surfaces.
[0047] In a specific operation, when judging the welding surface, multiple probes 10 respectively contact the three surfaces of the triangular weld strip 4. A known and appropriate constant current (I) can be applied to each surface of the triangular weld strip 4 through the probes 10. The voltage between any two surfaces of the triangular weld strip 4 can be measured through the probes 10. The resistance between these two surfaces of the triangular weld strip 4 can be calculated according to Ohm's law U=IR.
[0048] The measurement process was repeated until every two sides of the triangular weld strip 4 had been tested. By comparing the resistance values of the reflective bevel and the welded surface, the welded surface was accurately identified.
[0049] The resistance difference of each contact surface of the triangular welding strip 4 is measured by the probe 10, which is not affected by ambient light and the surface condition of the welding strip, making the test results more reliable. This provides an accurate basis for subsequent automatic correction and solves the problem of misalignment of the welding surface caused by the torsion of the triangular welding strip 4.
[0050] It is understandable that the determination of the three faces of the triangular welding strip 4 can also be done in other ways. For example, in some scenarios, it can be done by manual visual inspection; in other scenarios, it can be identified by an industrial camera, etc.
[0051] In this embodiment, the traction mechanism includes a gripper 7 and a driving component for moving the gripper 7. The gripper 7 is used to clamp the cut short triangular welding strip. The driving component drives the gripper 7 to complete the torsion correction action, and then the torsion short triangular welding strip is placed on the bearing component 8, so that the welding surface of the triangular welding strip 4 faces the solar cell, thereby improving the welding quality and production efficiency of the photovoltaic module.
[0052] Specifically, the gripper 7 can be a pneumatic gripper or an electric gripper. The pneumatic gripper opens and closes under air pressure control, offering a fast response speed; the electric gripper is driven by a servo motor, providing high positioning accuracy. The drive component can be a linear motor, a servo cylinder, or a ball screw module. A linear motor enables high-speed reciprocating motion, a servo cylinder has a simple structure, and a ball screw module offers high positioning accuracy. The appropriate option can be selected based on the specific requirements.
[0053] In this embodiment, the triangular welding strip torsion correction device further includes a coaxial rod 9, which is fixed below the first fixed clamp 2 and the movable clamp 3, and is arranged parallel to the first fixed clamp 2 and the movable clamp 3. The coaxial rod 9 provides a stable reference for the first fixed clamp 2 and the movable clamp 3, ensuring that the first fixed clamp 2 and the movable clamp 3 maintain a precise parallel relationship during movement and clamping, making the cold drawing correction process more accurate and effectively correcting the torsion of the triangular welding strip 4.
[0054] In this embodiment, the triangular welding strip torsion correction device further includes a supporting component 8, which is located downstream of the torsion correction mechanism 5 and is used to receive and place the torsion-corrected triangular welding strip 4. The driving component of the traction mechanism is also located on the supporting component 8. The triangular welding strip 4, after being corrected by the guiding component, is directly placed at the designated position on the supporting component 8 by the traction mechanism, completing the positioning preparation for subsequent welding processes without manual intervention. This is particularly suitable for high-precision continuous production of ultra-fine welding strips. Through the coordinated operation of the mechanical structure, the directional consistency of the triangular welding strip 4 is ensured throughout the entire process from correction to positioning, improving the yield rate of the welding process.
[0055] Example 2
[0056] This second embodiment is a specific application of the first embodiment. The process of the triangular welding strip torsion correction device includes the delivery of the triangular welding strip, the cutting of the triangular welding strip, the judgment of the welding surface of the triangular welding strip, and the torsion correction of the triangular welding strip.
[0057] Delivery of triangular welding strips
[0058] When the triangular welding strip torsion correction device is first run, the triangular welding strip 4 conveyed by the welding strip feeding mechanism 1 is manually guided into the clamping groove of the first fixed clamp 2 and the moving clamp 3 (at this time, the moving clamp 3 is close to the fixed clamp), and the moving clamp 3 is tightened.
[0059] Then, the moving clamp 3 moves forward (forward means the direction of pulling out the triangular welding strip 4), moving a short distance (about 20-30mm, this distance can be adjusted according to actual needs).
[0060] Subsequently, the first fixed clamp 2 clamps, and the movable clamp 3 releases and resets, returning to its origin (here, the origin is a self-set point, located on the side closer to the first fixed clamp 2). The movable clamp 3 clamps the triangular welding strip 4 again, the first fixed clamp 2 releases, the movable clamp 3 clamps and delivers it through the torsion correction mechanism 5, causing the head of the triangular welding strip 4 to extend a distance beyond the second fixed clamp 6, completing the delivery action.
[0061] Cutting of triangular welding strip
[0062] After the delivery of the triangular welding strip 4 is completed, the first fixed clamp 2 and the second fixed clamp 6 clamp simultaneously, and the movable clamp 3 releases and resets, returning to its original position and clamping the triangular welding strip 4. At this time, the cutting function is activated, the upper blade block 33 and the lower blade block 35 clamp the triangular welding strip 4, and the cutter 34 quickly cuts down, completing the cutting of the triangular welding strip 4.
[0063] Determining the Welding Surface of Triangular Weld Strips
[0064] Within the torsion correction mechanism 5, probes 10 on each face of the triangular through-hole extend to contact and measure each face of the triangular solder strip 4. By applying a known and appropriate constant current (I) through the probes 10 to each surface of the triangular solder strip 4, the resistance between each pair of faces is measured (calculated according to Ohm's law U=IR). This allows the welding face of the triangular solder strip 4 to be determined, ensuring that the welding face always faces the solar cell. This provides accurate positioning for subsequent welding operations and effectively reduces the occurrence of welding defects.
[0065] Torsion correction of triangular welding strip
[0066] After completing the steps of "delivering the triangular welding strip", "cutting the triangular welding strip", and "judging the welding surface of the triangular welding strip", a torsion correction is performed.
[0067] First, the gripper 7 clamps the triangular welding strip 4, the second fixed clamp 6 releases, and the torsion correction mechanism 5, under the action of the external drive mechanism, torsional correction of the triangular welding strip 4. After torsion, the torsion correction mechanism 5 locks, and the probe 10 retracts.
[0068] Subsequently, the gripper 7 pulls the twisted triangular welding strip 4 through the triangular hole, and the twisted triangular welding strip 4 is corrected by cold drawing. The twisted triangular welding strip 4 is then placed on the bearing component 8 to complete the twist correction process.
[0069] The above-mentioned triangular welding strip torsion correction device performs torsion correction on the triangular welding strip 4 through physical means. The structure is simple and reliable, and it also ensures that the welding surface of the triangular welding strip 4 is always correctly aligned with the battery cell, thereby improving the welding quality and the reliability of the module.
[0070] In summary, the triangular welding strip torsion correction device proposed in this utility model automatically torsional corrects the triangular welding strip fed by the welding strip feeding mechanism, clamps and cuts it by the clamping and cutting mechanism, corrects the orientation of the triangular welding strip by the torsion correction mechanism, and pulls the triangular welding strip by the traction mechanism to correct the deviation, thereby realizing the function of automatic torsion correction of the triangular welding strip, so that the welding surface of the triangular welding strip is aligned, improving the welding quality and production efficiency of photovoltaic modules.
[0071] Furthermore, the triangular welding strip torsion correction device uses probes to measure the resistance values between different surfaces to determine the position of the welding surface, and uses a physical structure to torsion and correct the triangular welding strip. The structure is simple and reliable, the detection is accurate, and no manual intervention is required, which greatly improves the automation level of the production line.
[0072] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.
Claims
1. A triangular welding strip torsion correction device, characterized in that, include: A welding strip feeding mechanism is used to convey triangular welding strips; A clamping and cutting mechanism is provided at the discharge end of the welding strip feeding mechanism for clamping and cutting the triangular welding strip output from the welding strip feeding mechanism; A torsion correction mechanism is located downstream of the clamping and cutting mechanism and is used to torsion correct the orientation of the triangular welding strip; A traction mechanism, located at the outlet end of the torsion correction mechanism, is used to grab the triangular welding strip after it has been cut and torsion corrected, and pull the triangular welding strip through the torsion correction mechanism.
2. The triangular welding strip torsion correction device as described in claim 1, characterized in that, The clamping and cutting mechanism includes a first fixed clamp, a movable clamp, and a second fixed clamp arranged along the conveying direction of the triangular welding strip; the first fixed clamp and the second fixed clamp are fixedly arranged, the movable clamp is arranged between the first fixed clamp and the second fixed clamp, and the movable clamp can move relative to the first fixed clamp and the second fixed clamp; the first fixed clamp, the second fixed clamp, and the movable clamp cooperate with each other to clamp, cut, and deliver the triangular welding strip.
3. The triangular welding strip torsion correction device as described in claim 2, characterized in that, The movable fixture includes a download block, an upper pressure block fixed above the download block, an upper cutting block mounted on the upper pressure block, a cutter mounted on the upper cutting block, and a lower cutting block mounted on the download block. A channel for the triangular welding strip to pass through is formed between the upper cutting block and the lower cutting block.
4. The triangular welding strip torsion correction device as described in claim 3, characterized in that, The cutting edge of the cutter forms an angle with the horizontal plane.
5. The triangular welding strip torsion correction device as described in claim 4, characterized in that, The included angle is in the range of 5-30 degrees.
6. The triangular welding strip torsion correction device as described in claim 1, characterized in that, The torsion correction mechanism includes a guide component with a through hole and a detection component fixed to the inner wall of the through hole. The guide component is used to provide a guide path, and the detection component is used to detect the orientation of the triangular weld strip by measuring the resistance difference between the reflective inclined surface of the triangular weld strip and the contact surface, thereby determining the position of the welding surface.
7. The triangular welding strip torsion correction device as described in claim 6, characterized in that, The guiding component includes a disk with a triangular through hole, and the detection component includes multiple probes disposed on the inner wall of the through hole. The probes are respectively mounted on the three inner walls of the triangular through hole through a retractable support structure.
8. The triangular welding strip torsion correction device as described in claim 1, characterized in that, The traction mechanism includes a gripper and a drive component for moving the gripper, the gripper being used to clamp the cut short triangular welding strip.
9. The triangular welding strip torsion correction device as described in claim 1, characterized in that, It also includes a coaxial rod, which is fixed below the first fixed clamp and the movable clamp, and is arranged parallel to the first fixed clamp and the movable clamp.
10. The triangular welding strip torsion correction device as described in claim 1, characterized in that, It also includes a support component, located downstream of the torsion correction mechanism, for receiving and placing the torsion-corrected triangular welding strip, and the drive component of the traction mechanism is also located on the support component.