A high-speed solar cell thickness online detection device

Abstract

This utility model relates to the field of battery cell thickness detection technology, specifically a high-speed online battery cell thickness detection device. It includes a detection base, a measuring mechanism, and a positioning mechanism. The measuring mechanism is mounted on the surface of the detection base, allowing for precise and flexible adjustment of the detection position to adapt to various specifications and multi-point detection needs. Horizontal displacement is precisely controllable, covering the entire area of ​​the battery cell for detection, significantly improving the equipment's compatibility with different specifications of battery cells. Multiple sets of measuring cylinders perform simultaneous detection, enabling thickness uniformity analysis. Except for two sets of calibration measuring cylinders at the edges, the remaining measuring cylinders can simultaneously align with multiple detection points on the battery cell, synchronously completing multi-point thickness detection. This multi-parallel detection design not only quickly obtains the average thickness of the battery cell but also analyzes the thickness uniformity by comparing thickness data from different detection points. The multi-point detection function helps the production line promptly identify defective products, ensuring that the measurement data accurately reflects the original thickness of the battery cell.

Description

Technical Field

[0001] This utility model relates to the field of battery cell thickness detection technology, specifically to a high-speed online battery cell thickness detection device. Background Technology

[0002] In the field of battery production, the thickness accuracy and uniformity of solar cells are core indicators affecting their photoelectric conversion efficiency, mechanical strength, and compatibility with subsequent component packaging. Excessive thickness deviation or uneven thickness in some areas can easily lead to solar cells cracking under stress during lamination packaging, or reduce the overall power generation performance due to unbalanced current distribution. Therefore, it is necessary to conduct 100% online detection of solar cell thickness to ensure that the products leaving the factory meet quality standards.

[0003] Existing online thickness detection devices for high-speed solar cells have the following shortcomings: 1. Traditional testing devices can only perform single-point or fixed-point testing, which is difficult to cover key areas such as the edges and diagonals of the solar cells. This makes it impossible to fully analyze the thickness uniformity of the solar cells, affecting the accuracy of quality judgment.

[0004] 2. Traditional testing devices often require manual placement of the battery cells into the preset area of ​​the testing base, followed by manual adjustment of the clamps to fix the battery cells. It is difficult for workers to ensure that the battery cells are always in the center position, which can easily lead to problems such as edge offset and angle tilt. This results in the subsequent measurement components not being able to accurately align with the preset testing points, directly causing deviations in the thickness data. Utility Model Content

[0005] The purpose of this invention is to provide a high-speed online detection device for battery cell thickness.

[0006] To achieve this objective, the present invention adopts the following technical solution: A high-speed online thickness detection device for solar cells is provided, including a detection base, a measuring mechanism, and a positioning mechanism. The measuring mechanism is installed on the surface of the detection base and includes a support frame, a transverse base, a measuring cylinder, an indicator, a scale, and a push rod. The support frame is fixed on both sides of the surface of the detection base. The transverse base is slidably connected to a limiting track between two sets of support frames. The measuring cylinder is located below the transverse base. The indicator is slidably connected to an indicator groove opened inside the measuring cylinder. The scale is fixed on the surface of the measuring cylinder, and the indicator is attached to the surface of the scale. The push rod is slidably connected inside the measuring cylinder. There are at least three sets of measuring cylinders. The two sets of measuring cylinders at the edges face the fins on both sides of the surface of the detection base, and the remaining measuring cylinders face the solar cell placement area on the surface of the detection base. During detection, the two sets of measuring cylinders at the edges and their internal structures serve as measurement reference data, and the remaining measuring cylinders and their internal structures serve as measurement result data. The positioning mechanism is installed on both sides of the surface of the detection base and includes an electric push rod and a pressing plate. The electric push rod is fixed on the surface of the detection base, and the pressing plate is located at the output end of the electric push rod.

[0007] Preferably, the measuring mechanism further includes a threaded rod and a transverse motor. The threaded rod is rotatably connected between two sets of support frames, and the transverse motor is fixed on the surface of one set of support frames. One end of the threaded rod is connected to the output end of the transverse motor, and the transverse seat is threadedly connected to the surface of the threaded rod. Starting the transverse motor can drive the threaded rod to rotate, thereby driving the transverse seat to slide along the limit track between the support frames to adjust the detection position of the measuring cylinder.

[0008] Preferably, a lifting cylinder is fixedly connected to the bottom of the transverse base, and a bearing plate is fixed to the output end of the lifting cylinder. The bearing plate is made of magnetic material, and a magnetic block is attached to the top of the measuring cylinder. The magnetic block is magnetically connected to the bearing plate. Activating the lifting cylinder can push the bearing plate to move up and down, causing the measuring cylinder to move closer to or away from the battery cells on the surface of the detection base, thereby adjusting the detection height.

[0009] Preferably, a push block is slidably connected inside the measuring cylinder, the push block is fixed to the top of the push rod, a spring is fixed between the top of the push block and the top of the inner cavity of the measuring cylinder, and the indicator is fixedly connected to the push block. A measuring plate is fixed to the bottom of the push rod.

[0010] Preferably, the positioning mechanism further includes a push-pull plate, a movable plate, a rotating shaft, a drive gear, and a drive rack. The push-pull plate is fixed to the output end of the electric push rod, the movable plate is fixed to the bottom end of the push-pull plate, and the movable plate is slidably connected to the surface of the detection base. The rotating shaft is rotatably connected to the surface of the movable plate through a bearing seat. The drive gear is fixed to both ends of the surface of the rotating shaft. The drive rack is meshed with the surface of the drive gear, and the pressing plate is fixedly connected to the drive rack. The drive rack is slidably connected to the surface of the movable plate through a sliding frame.

[0011] Preferably, positioning slide rods are symmetrically fixed on both sides of the surface of the extrusion plate, and sliding holes adapted to the positioning slide rods are opened inside the push-pull plate. The positioning slide rods slide through the sliding holes, and spring two is sleeved on the surface of the positioning slide rods, with the two ends of spring two respectively fixed between the extrusion plate and the push-pull plate.

[0012] Preferably, a driven gear is fixed in the middle of the surface of the rotating shaft, a driven rack is meshed with the surface of the driven gear, and the driven rack is slidably connected to the surface of the moving plate through a sliding frame.

[0013] Preferably, a fixing frame is fixed to the top of the driven rack, and multiple sets of measuring cylinders with the same structure as those below the support plate are fixed to the end of the fixing frame.

[0014] The beneficial effects of this utility model are: 1. This utility model discloses a high-speed online thickness detection device for solar cells. The detection position is precisely and flexibly adjustable, adapting to the detection needs of multiple specifications and multiple points. The horizontal displacement is precisely controllable, covering the entire area of ​​the solar cell for detection, which greatly improves the compatibility of the equipment with solar cells of different specifications. Multiple sets of measuring cylinders detect simultaneously, realizing thickness uniformity analysis. Except for two sets of measuring cylinders used for calibration at the edge, the remaining measuring cylinders can be aligned with multiple detection points of the solar cell at the same time to complete multi-point thickness detection simultaneously. This multi-group parallel detection design can not only quickly obtain the average thickness of the solar cell, but also analyze the thickness uniformity of the solar cell by comparing the thickness data of different detection points. The multi-point detection function can help the production line to detect unqualified products in a timely manner, ensuring that the measurement data can truly reflect the original thickness of the solar cell.

[0015] 2. The present invention provides a high-speed online thickness detection device for battery cells. The measuring cylinder is magnetically connected to the support plate via a magnetic block at the top, allowing for disassembly and installation of the measuring cylinder without tools. When it is necessary to detect the thickness of the battery cell at different locations, the position of the measuring cylinder can be quickly switched via the magnetic connection, thereby improving the equipment's response speed to diverse detection needs.

[0016] 3. This utility model provides a high-speed online thickness detection device for solar cells, which automatically centers and positions the cells, eliminating human alignment errors. By having two sets of extrusion plates move synchronously towards both sides of the solar cell, the device achieves automated centering and positioning. Compared to manual placement and alignment, this structure avoids the randomness of manual operation and ensures that the solar cell is always in the center of the preset detection area. This provides a stable benchmark for the accurate alignment of the detection points in subsequent thickness detection, reducing the risk of data distortion caused by positioning deviations from the source.

[0017] 4. This utility model provides a high-speed online thickness detection device for battery cells. The positioning force is adaptively adjusted to avoid over- or under-positioning. When the extrusion plate contacts the edge of the battery cell, the reaction force of the battery cell pushes the extrusion plate to drive the positioning slide rod to slide along the sliding hole of the push-pull plate, and simultaneously compresses the second spring. The elastic deformation of the second spring can buffer the clamping force in real time. If there is a slight deviation in the size of the battery cell, the second spring can compensate for the clamping distance through deformation. This not only avoids the battery cell from shifting during detection due to insufficient clamping force, but also prevents the edge deformation of the battery cell due to excessive clamping force, further ensuring the integrity of the battery cell's shape after positioning, and indirectly ensuring that the detection data can reflect the true thickness of the battery cell. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments of the present invention will be briefly described below.

[0019] Figure 1 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 2 ; Figure 3 This is a schematic diagram of the structure of the testing base and the extrusion plate of this utility model; Figure 4 This is a schematic diagram of the structure of the movable plate and the extrusion plate of this utility model; Figure 5 This is a cross-sectional view of the measuring cylinder of this utility model; Figure 6 This is a schematic diagram of the structure of the bearing plate and measuring cylinder of this utility model; In the diagram: 1. Detection base; 2. Measuring mechanism; 3. Support frame; 4. Threaded rod; 5. Horizontal movement motor; 6. Horizontal movement seat; 7. Lifting cylinder; 8. Bearing plate; 9. Measuring cylinder; 10. Magnetic block; 11. Push block; 12. Spring one; 13. Indicator; 14. Scale; 15. Push rod; 16. Measuring plate; 17. Positioning mechanism; 18. Electric push rod; 19. Push-pull plate; 20. Moving plate; 21. Rotating shaft; 22. Driving gear; 23. Driving rack; 24. Pressing plate; 25. Positioning slide rod; 26. Spring two; 27. Driven gear; 28. Driven rack; 29. ​​Fixing frame. Detailed Implementation

[0020] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0021] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual images. They should not be construed as limiting the scope of this patent. To better illustrate the embodiments of the present invention, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product.

[0022] Reference Figures 1 to 6 The high-speed battery cell thickness online detection device shown includes a detection base 1, a measuring mechanism 2, and a positioning mechanism 17. The measuring mechanism 2 is mounted on the surface of the detection base 1 and includes a support frame 3, a transverse seat 6, a measuring cylinder 9, an indicator 13, a scale 14, and a push rod 15. The support frame 3 is fixed on both sides of the surface of the detection base 1. The transverse seat 6 is slidably connected to a limiting track between two sets of support frames 3. The measuring cylinder 9 is located below the transverse seat 6. The indicator 13 is slidably connected to an indicator groove opened inside the measuring cylinder 9. The scale 14 is fixed to the surface of the measuring cylinder 9, and the indicator 13 is abutted against the scale. On the surface of ruler 14, push rod 15 is slidably connected to the inside of measuring cylinder 9. There are at least three sets of measuring cylinders 9. The two sets of measuring cylinders 9 at the edges are directly opposite the wing edges on both sides of the surface of the detection base 1, and the remaining measuring cylinders 9 are directly opposite the battery cell placement area on the surface of the detection base 1. During the test, the two sets of measuring cylinders 9 at the edges and their internal structure are used as measurement reference data, and the remaining measuring cylinders 9 and their internal structure are used as measurement result data. Positioning mechanism 17 is installed on both sides of the surface of the detection base 1. Positioning mechanism 17 includes electric push rod 18 and pressing plate 24. Electric push rod 18 is fixed on the surface of the detection base 1, and pressing plate 24 is set at the output end of electric push rod 18.

[0023] The measuring mechanism 2 also includes a threaded rod 4 and a transverse motor 5. The threaded rod 4 is rotatably connected between two sets of support frames 3. The transverse motor 5 is fixed on the surface of one set of support frames 3, and one end of the threaded rod 4 is connected to the output end of the transverse motor 5. The transverse seat 6 is threadedly connected to the surface of the threaded rod 4. Starting the transverse motor 5 can drive the threaded rod 4 to rotate, thereby driving the transverse seat 6 to slide along the limit track between the support frames 3 to adjust the detection position of the measuring cylinder 9. After the battery cell is clamped and positioned, the output end of the transverse motor 5 is started, which drives the threaded rod 4 to rotate, thereby driving the transverse seat 6 to slide horizontally along the limit track between the two sets of support frames 3 until the measuring cylinder 9 below the transverse seat 6 is aligned with the preset detection point on the battery cell. The lifting cylinder 7 fixed at the bottom of the transverse seat 6 is started, and its output end pushes the bearing plate 8 to move vertically downward. Since the magnetic block 10 at the top of the measuring cylinder 9 is magnetically connected to the bearing plate 8, the measuring cylinder 9 descends synchronously with the bearing plate 8 until the measuring plate 16 at the bottom of the measuring cylinder 9 approaches the surface of the battery cell, and the lifting cylinder 7 stops working.

[0024] A lifting cylinder 7 is fixedly connected to the bottom of the horizontal moving base 6. A bearing plate 8 is fixed to the output end of the lifting cylinder 7. The bearing plate 8 is made of magnetic material. A magnetic block 10 is attached to the top of the measuring cylinder 9. The magnetic block 10 is magnetically connected to the bearing plate 8. Activating the lifting cylinder 7 can push the bearing plate 8 to move up and down, causing the measuring cylinder 9 to move closer to or away from the battery cells on the surface of the detection base 1, thereby adjusting the detection height. Continuing to control the lifting cylinder 7, the bearing plate 8 is slowly lowered. The measuring plate 16 first contacts the surface of the battery cells, and then... As it continues to descend, the measuring plate 16 is subjected to the reaction force of the battery cell, which pushes the push rod 15 to slide upward along the inside of the measuring cylinder 9. The push block 11, which is fixed to the top of the push rod 15, moves upward synchronously with it. When the push block 11 moves upward, it compresses the spring 12 between it and the top of the inner cavity of the measuring cylinder 9, causing the spring 12 to undergo elastic deformation. At the same time, the indicator 13, which is fixed to the push block 11, slides upward synchronously with the push block 11, and the indicator 13 always adheres to the scale 14 on the surface of the measuring cylinder 9.

[0025] A push block 11 is slidably connected inside the measuring cylinder 9. The push block 11 is fixed to the top of the push rod 15. A spring 12 is fixed between the top of the push block 11 and the top of the inner cavity of the measuring cylinder 9. The indicator 13 is fixedly connected to the push block 11. A measuring plate 16 is fixed to the bottom of the push rod 15. When the spring 12 is compressed to a preset deformation degree or when the measuring plate 16 at the bottom of the two sets of measuring cylinders 9 aligned with the edge of the test base 1 contacts and adheres to the surface of the test base 1, the lifting cylinder 7 stops working. The scale values ​​corresponding to each indicator 13 on the scale 14 are read. The scale values ​​read by the two sets of measuring cylinders 9 at the edge are the measurement reference data used to calibrate the test benchmark. The scale values ​​read by the other measuring cylinders 9 are the measurement result data. The measurement result data is compared with the measurement reference data to calculate the actual thickness of each test point of the battery cell.

[0026] The positioning mechanism 17 also includes a push-pull plate 19, a movable plate 20, a rotating shaft 21, a drive gear 22, and a drive rack 23. The push-pull plate 19 is fixed to the output end of the electric push rod 18, the movable plate 20 is fixed to the bottom end of the push-pull plate 19, and the movable plate 20 is slidably connected to the surface of the detection base 1. The rotating shaft 21 is rotatably connected to the surface of the movable plate 20 through a bearing seat. The drive gear 22 is fixed to both ends of the surface of the rotating shaft 21. The drive rack 23 is meshed with the surface of the drive gear 22, and the pressing plate 24 is fixedly connected to the drive rack 23. The drive rack 23 is slidably connected to the sliding frame. On the surface of the moving plate 20, the battery cell to be tested is placed on the battery cell placement area on the surface of the testing base 1, ensuring that the edge of the battery cell is initially aligned with the boundary of the placement area, in preparation for subsequent positioning and testing. The positioning mechanism 17 automatically centers and positions the battery cell to avoid the battery cell shifting during testing and affecting the accuracy of the data. The electric push rod 18 is activated, and its output end pushes the push-pull plate 19 to move horizontally along the surface of the testing base 1, which drives the moving plate 20 fixed to the push-pull plate 19 to move synchronously, so that the entire positioning assembly is close to the battery cell, and the two sets of extrusion plates 24 move closer to both sides of the battery cell until the battery cell is clamped.

[0027] Positioning slide rods 25 are symmetrically fixed on both sides of the surface of the extrusion plate 24. The push-pull plate 19 has a sliding hole adapted to the positioning slide rod 25. The positioning slide rod 25 slides through the sliding hole. The second spring 26 is sleeved on the surface of the positioning slide rod 25, and the two ends of the second spring 26 are respectively fixed between the extrusion plate 24 and the push-pull plate 19. When the extrusion plate 24 contacts the edge of the battery cell, it is blocked by the edge of the battery cell. The extrusion plate 24 drives the positioning slide rod 25 to slide in the sliding hole opened inside the push-pull plate 19. At the same time, the second spring 26 is compressed, so that the extrusion plate 24 moves relative to the surface of the push-pull plate 19. Through the movement of the extrusion plate 24, the active rack 23 can be driven to move synchronously, thereby driving the active gear 22 and the rotating shaft 21 to rotate on the surface of the moving plate 20.

[0028] A driven gear 27 is fixed in the middle of the surface of the rotating shaft 21. A driven rack 28 is meshed with the surface of the driven gear 27. The driven rack 28 is slidably connected to the surface of the moving plate 20 through a sliding frame. The rotation of the rotating shaft 21 can drive the driven gear 27 to rotate together, which can drive the driven rack 28 to slide in the sliding frame on the surface of the moving plate 20. This will drive the fixed frame 29 and the measuring cylinder 9 fixed at its end and its internal structure to move synchronously, so as to achieve clamping and positioning while automatically completing the detection of the thickness of the battery cell.

[0029] A fixing frame 29 is fixed to the top of the driven rack 28, and multiple sets of measuring cylinders 9 with the same structure as those below the support plate 8 are fixed to the end of the fixing frame 29.

[0030] The second spring 26 provides buffer protection. During the process of the extrusion plate 24 clamping the battery cell, the elastic force of the second spring 26 can buffer the clamping force of the extrusion plate 24 on the battery cell, and avoid damage to the battery cell due to excessive clamping force.

[0031] When it is necessary to reset the measuring mechanism 2 or to measure in other positions, start the lifting cylinder 7 to move the bearing plate 8 and measuring cylinder 9 upward. The push rod 15 slides downward under the elastic reset force of the spring 12, and the indicator 13 returns to the initial scale. Then start the transverse motor 5 to drive the transverse seat 6 back to the initial position or move to other measuring positions to repeat the above measurement operation.

[0032] When the measuring cylinder 9 moves synchronously with the fixed frame 29, its movement trajectory is fully coordinated with the battery cell positioning process. While the battery cell is centered, the measuring cylinder 9 moves exactly above the preset detection point. There is no need to lower the measuring cylinder 9 to a position close to the battery cell before positioning. The measuring cylinder 9 moves to multiple preset detection points on the edge of the battery cell during the positioning process, improving the compatibility of the device with different detection requirements.

Claims

1. A high-speed battery piece thickness on-line detection device, comprising a detection base (1), characterized in that: It also includes a measuring mechanism (2) and a positioning mechanism (17). The measuring mechanism (2) is installed on the surface of the detection base (1). The measuring mechanism (2) includes a support frame (3), a transverse seat (6), a measuring cylinder (9), an indicator (13), a scale (14), and a push rod (15). The support frame (3) is fixed on both sides of the surface of the detection base (1). The transverse seat (6) is slidably connected to the limiting rail between the two sets of support frames (3). The measuring cylinder (9) is set below the transverse seat (6). The indicator (13) is slidably connected to the indicator groove opened inside the measuring cylinder (9). The scale (14) is fixed on the surface of the measuring cylinder (9), and the indicator (13) is attached to the surface of the scale (14). The push rod (15) The rod (15) is slidably connected inside the measuring cylinder (9). There are at least three sets of measuring cylinders (9). The two sets of measuring cylinders (9) on the edge face the wing edges on both sides of the surface of the test base (1), and the remaining measuring cylinders (9) face the battery cell placement area on the surface of the test base (1). During the test, the two sets of measuring cylinders (9) on the edge and their internal structure are used as measurement reference data, and the remaining measuring cylinders (9) and their internal structure are used as measurement result data. The positioning mechanism (17) is installed on both sides of the surface of the test base (1). The positioning mechanism (17) includes an electric push rod (18) and a pressing plate (24). The electric push rod (18) is fixed on the surface of the test base (1), and the pressing plate (24) is set at the output end of the electric push rod (18).

2. The high-speed battery sheet thickness on-line detection device according to claim 1, characterized in that: The measuring mechanism (2) also includes a threaded rod (4) and a transverse motor (5). The threaded rod (4) is rotatably connected between two sets of support frames (3). The transverse motor (5) is fixed on the surface of one set of support frames (3), and one end of the threaded rod (4) is connected to the output end of the transverse motor (5). The transverse seat (6) is threadedly connected to the surface of the threaded rod (4). Starting the transverse motor (5) can drive the threaded rod (4) to rotate, thereby driving the transverse seat (6) to slide along the limit track between the support frames (3) to adjust the detection position of the measuring cylinder (9).

3. The high-speed battery sheet thickness on-line detection device according to claim 2, characterized in that: A lifting cylinder (7) is fixedly connected to the bottom of the transverse seat (6). A bearing plate (8) is fixed to the output end of the lifting cylinder (7). The bearing plate (8) is made of magnetic material. A magnetic block (10) is attached to the top of the measuring cylinder (9). The magnetic block (10) is magnetically connected to the bearing plate (8). When the lifting cylinder (7) is activated, the bearing plate (8) can be pushed up and down, causing the measuring cylinder (9) to move closer to or away from the battery cells on the surface of the detection base (1), thereby adjusting the detection height.

4. The high-speed battery sheet thickness on-line detection device according to claim 1, characterized in that: The measuring cylinder (9) has a sliding connection to a push block (11), which is fixed to the top of the push rod (15). A spring (12) is fixed between the top of the push block (11) and the top of the inner cavity of the measuring cylinder (9). The indicator (13) is fixedly connected to the push block (11), and a measuring plate (16) is fixed to the bottom of the push rod (15).

5. The high-speed on-line detection device for the thickness of a battery cell according to claim 1, characterized in that: The positioning mechanism (17) also includes a push-pull plate (19), a moving plate (20), a rotating shaft (21), a drive gear (22), and a drive rack (23). The push-pull plate (19) is fixed to the output end of the electric push rod (18), the moving plate (20) is fixed to the bottom end of the push-pull plate (19), and the moving plate (20) is slidably connected to the surface of the detection base (1). The rotating shaft (21) is rotatably connected to the surface of the moving plate (20) through the bearing seat. The drive gear (22) is fixed to both ends of the surface of the rotating shaft (21). The drive rack (23) is meshed with the surface of the drive gear (22), and the pressing plate (24) is fixedly connected to the drive rack (23). The drive rack (23) is slidably connected to the surface of the moving plate (20) through the sliding frame.

6. The high-speed on-line cell thickness detection device according to claim 5, characterized in that: Positioning slide rods (25) are symmetrically fixed on both sides of the surface of the extrusion plate (24). The inside of the push-pull plate (19) is provided with a sliding hole that matches the positioning slide rod (25). The positioning slide rod (25) slides through the sliding hole. Spring 2 (26) is sleeved on the surface of the positioning slide rod (25), and the two ends of spring 2 (26) are respectively fixed between the extrusion plate (24) and the push-pull plate (19).

7. The high-speed on-line cell thickness detection device according to claim 5, characterized in that: A driven gear (27) is fixed in the middle of the surface of the rotating shaft (21). A driven rack (28) is meshed with the surface of the driven gear (27), and the driven rack (28) is slidably connected to the surface of the moving plate (20) through a sliding frame.

8. The high-speed battery sheet thickness on-line detection device according to claim 7, characterized in that: A fixing frame (29) is fixed to the top of the driven rack (28), and multiple sets of measuring cylinders (9) with the same structure as the underside of the bearing plate (8) are fixed to the end of the fixing frame (29).

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