Automatic tightening mechanism for assembling caliper support

Abstract

The invention discloses an automatic tightening mechanism for assembling a caliper support, and relates to the field of industrial assembling.The automatic tightening mechanism comprises a machine body, a mounting base, a positioning mechanism, a mounting block and a position adjusting mechanism, the mounting base is fixed to the upper portion of the machine body, and the positioning mechanism for positioning the caliper support is arranged on the upper portion of the machine body; a mounting block is arranged below the mounting base, a position adjusting mechanism is connected to the upper portion of the mounting block, the horizontal position of the mounting block is adjusted through the position adjusting mechanism, a tightening rod is arranged below the mounting block, and the upper end of the tightening rod is located in the mounting block. According to the automatic tightening mechanism for assembling the caliper support, the multiple sets of supporting blocks are arranged to be matched with the rotary feeding shaft, so that screws can be continuously fed, the supporting blocks can be controlled to move under the tightening rod through rotation of the rotary feeding shaft, the screws are automatically fed, after the screws are fed, the screws can be continuously placed on the empty supporting blocks, and the working efficiency is greatly improved. And subsequent processing is facilitated.

Description

Technical Field

[0001] The invention relates to the technical field of industrial assembly, in particular to an automatic tightening mechanism for assembling a caliper bracket. Background Art

[0002] When assembling the caliper bracket, it is generally fastened by the cooperation of screws and nuts. It can be tightened manually or automatically tightened and installed by an industrial robot. Currently, automatic control tightening by robot instrument arms is gradually replacing manual processing.

[0003] Prior art 1 (application number CN201921989551.X, Chinese patent published on September 1, 2020) A caliper bracket combined automatic tightening workbench, which includes a stand, a caliper bracket positioning mechanism, a guide rod anti-rotation mechanism and a screw tightening mechanism, the stand is provided with a vertical lifting plate and a horizontal moving plate, the vertical lifting plate is located below the horizontal moving plate, the vertical lifting plate is fixedly connected to the caliper bracket positioning mechanism, the horizontal moving plate is slidably connected to the screw tightening mechanism and the guide rod anti-rotation mechanism is fixedly connected, the vertical lifting plate moves along the vertical Z direction under the action of a first driving source, the horizontal moving plate moves along the horizontal X and Y directions under the action of a second driving source, and the screw tightening mechanism approaches or moves away from the guide rod anti-rotation mechanism under the action of a third driving source. It is not only simple in structure and highly versatile, but also can ensure the anti-rotation limit of the guide rod when the clamp body and the bracket are assembled, and improve the screwing accuracy of the bolt; Prior art 2 (application number is CN202122675054.6, a Chinese patent published on March 15, 2022) A combination device of a screw assembly machine, which relates to the technical field of screw assembly setting. In view of the existing screw and nut assembly, which is generally completed by hand or simple tools, resulting in high labor intensity and low production efficiency, the following scheme is proposed, which includes a box body and a support frame, the support frame is fixedly installed on the top of the box body, the side wall of the support frame is fixedly installed with a PLC controller, the top of the support frame is fixedly installed with a hydraulic cylinder, the piston rod end of the hydraulic cylinder is fixedly installed with an electric screwdriver, a transmission mechanism is installed between the box body and the support frame, a clamping mechanism is installed between the box body and the support frame, and the clamping mechanism includes a slider, and the two sliders are slid toward each other and sleeved on the limit rod. It not only has the function of automatic assembly of screws and nuts, but also improves the efficiency of screw removal, which is suitable for promotion.

[0004] When the current caliper bracket combined automatic tightening mechanism or other tightening mechanism is in use, the vertical movement of the tightening mechanism is controlled by an electric telescopic rod, etc., and its movement and rotation speed need to be matched, otherwise thread slippage is likely to occur, or the telescopic distance of the telescopic rod exceeds the movement distance of the screw, which is also likely to cause damage to the screw. In addition, when the current tightening mechanism is controlling the tightening of the screw, only one screw can be tightened at a time. After the screw is tightened, the device position needs to be readjusted and the screw needs to be installed again, which is time-consuming and reduces the overall tightening efficiency and the convenience of using the mechanism. Summary of the invention

[0005] The object of the present invention is to provide an automatic tightening mechanism for assembling a caliper bracket, so as to solve the problem proposed in the above-mentioned background technology that the vertical movement of the tightening mechanism is controlled by an electric telescopic rod, etc., and its movement and rotation speed need to be matched, otherwise the thread slippage phenomenon is likely to occur, or the telescopic distance of the telescopic rod exceeds the moving distance of the screw, which is also likely to cause damage to the screw, and the current tightening mechanism can only tighten one screw at a time when controlling the tightening of the screw, and the device position needs to be readjusted after the screw is tightened, and the screw needs to be installed again.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an automatic tightening mechanism for assembling a caliper bracket, comprising a machine body, a mounting seat, a positioning mechanism, a mounting block and a position adjustment mechanism, wherein the mounting seat is fixed on the top of the machine body, and a positioning mechanism for providing positioning for the caliper bracket is arranged on the top of the machine body, a mounting block is arranged below the mounting seat, and a position adjustment mechanism is connected above the mounting block, and the horizontal position of the mounting block is adjusted by the position adjustment mechanism, a tightening rod is arranged below the mounting block, and the upper end of the tightening rod is located inside the mounting block, a transmission rod is nested above the tightening rod, and a rotational connection is formed between the transmission rod and the mounting block, and a rotation driving mechanism is arranged on the outer side of the transmission rod to control the rotation of the transmission rod, and a vertical control mechanism is arranged above the tightening rod to provide control for the vertical movement of the tightening rod. The control system is characterized in that a fixed block is fixed on the outer side of the mounting block so that the fixed block and the mounting block can keep synchronous movement, a second motor is installed below the fixed block, and a rotating feeding shaft is connected below the second motor, a supporting block is arranged on the outer side of the rotating feeding shaft, and the supporting block is located below the tightening rod to provide support for the screw, and the supporting block and the center of the rotating feeding shaft are arranged at equal angles, and the supporting block under the tightening rod is switched by the rotation of the rotating feeding shaft, and the supporting blocks are arranged in pairs, and a through groove is formed in the middle part of the paired supporting blocks, so that the lower end of the screw passes through, and a supporting plate is connected to the inner end of the supporting block, a sliding groove is provided inside the rotating feeding shaft, and an up and down sliding structure is formed between the supporting plate and the sliding groove, an automatic resetting mechanism is arranged on the outer side of the support plate, a sliding connection is formed between the supporting block and the support plate, and an opening control mechanism is arranged on the outer side of the supporting block.

[0007] To further optimize the technical solution, the rotation drive mechanism includes a first gear, a second gear and a first motor; A first gear is fixed on the surface of the transmission rod and rotates synchronously with the transmission rod; The second gear is arranged outside the first gear, and the second gear and the first gear are meshed and connected, and the diameter of the second gear is smaller than the diameter of the first gear; The first motor is connected to the second gear to control the rotation of the second gear.

[0008] To further optimize the technical solution, a transmission block is fixed to the outer side of the tightening rod, and the tightening rod forms an up and down sliding structure between the transmission block and the transmission rod.

[0009] To further optimize the technical solution, the vertical control mechanism includes a first spring, a sliding ring, a first magnetic block and an electromagnet; A first spring is arranged above the tightening rod, and an upper end of the first spring is fixedly connected to the mounting block; A sliding ring is fixed below the first spring, and the lower surface of the sliding ring is in contact with the tightening rod; A first magnetic block is fixed to the upper end of the tightening rod; The electromagnet is fixed inside the mounting block and is located above the first magnetic block. The electromagnet attracts the first magnetic block when powered on.

[0010] To further optimize the technical solution, the automatic reset mechanism includes a reset rope, a rotating shaft and a torsion spring; A reset rope, fixed above the support plate; The rotating shaft is rotatably mounted inside the rotating feeding shaft, and the upper end of the reset rope is wound around the surface of the rotating shaft; The torsion spring is installed at the end of the rotating shaft to provide a rotational restoring force for the rotating shaft.

[0011] To further optimize the technical solution, a guide block is fixed on the surface of the support block, and the guide block is inserted into the adjacent support blocks and forms a sliding connection between the support blocks.

[0012] To further optimize the technical solution, balls are evenly arranged above the support block, and the balls are in contact with the screw heads supported by the support block.

[0013] To further optimize the technical solution, the opening control mechanism includes a slide plate, a second spring, a control rope and an automatic drive mechanism; The slide plate is fixed on the inner side of the support block, and the support block is located inside the support plate and forms a sliding connection between the support plate; A second spring is fixed to the outer side of the slide plate to provide thrust for the slide plate; A control rope, fixed on the outside of the skateboard to control the movement of the skateboard; The automatic driving mechanism is connected with the control rope and automatically controls the movement of the supporting block after the supporting block is lowered.

[0014] To further optimize the technical solution, the automatic drive mechanism includes a magnetic attraction block and a second magnetic block; A magnetic attraction block is fixed to the inner end of the control rope, and a sliding connection is formed between the magnetic attraction block and the support plate; The second magnetic block is fixed inside the rotating feeding shaft, and the second magnetic block is located below the supporting plate.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The tightening of the screw is controlled by a tightening rod, and the tightening rod can automatically move downward under the action of the first spring, so that it can automatically move as the screw is tightened to ensure its tightening effect. At the same time, the tightening rod can be controlled to move upward to reset by cooperating with the attraction of the electromagnet to the first magnetic block, making its tightening control simpler.

[0016] The support block provides support for the screws to facilitate the subsequent installation of the screws. The support block can keep synchronized with the movement of the tightening rod under the connection between the installation block and the fixing block, so that it can always be located below the tightening rod, which is convenient for tightening and installing screws in different positions.

[0017] The support of the support block on the screw head can be released by moving the support block, so that the screw can be installed smoothly. At the same time, the support block automatically resets upward after releasing the support for the screw, without affecting the subsequent use.

[0018] By setting up multiple groups of support blocks and cooperating with the rotating feeding shaft, the screws can be fed continuously. The support blocks can be controlled to move under the tightening rod by rotating the rotating feeding shaft to automatically feed the screws. After the screws are fed, the empty support blocks can continue to be used to place the screws, which is convenient for subsequent processing and improves the feeding efficiency of the screws, thereby improving the overall tightening efficiency and ease of use of the tightening mechanism.

[0019] Through the mutual attraction between the second magnetic block and the magnetic attraction block, the movement of the support block can be automatically controlled after the support plate moves downward, so that the support block can automatically move away from the outside of the screw after the screw is connected, without affecting the continuous downward movement of the screw, and also facilitating the subsequent use of the support block. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a side view structural schematic diagram of the present invention; Figure 3 This is a schematic diagram of the three-dimensional structure of the mounting block of the present invention; Figure 4 This is a schematic diagram of the main cross-sectional structure of the installation block of the present invention; Figure 5 It is a schematic diagram of the main cross-sectional structure of the transmission rod of the present invention; Figure 6 It is a schematic diagram of the top-sectional structure of the transmission rod of the present invention; Figure 7 This is a schematic diagram of the three-dimensional structure of the rotary feeding shaft of the present invention; Figure 8 This is a schematic diagram of the three-dimensional structure of the support block of the present invention; Fig. 9 This is a schematic diagram of the top-sectional structure of the support plate of the present invention; Fig.10 This is a schematic diagram of the main cross-sectional structure of the rotary feeding shaft of the present invention; Fig.11 It is a schematic diagram of the top view structure of the rotating shaft of the present invention.

[0021] In the figure: 1. body; 2. mounting seat; 3. positioning mechanism; 4. mounting block; 5. position adjustment mechanism; 6. tightening rod; 7. transmission rod; 8. first gear; 9. second gear; 10. first motor; 11. transmission block; 12. first spring; 13. slide ring; 14. first magnetic block; 15. electromagnet; 16. fixed block; 17. second motor; 18. rotating feeding shaft; 19. support block; 20. support plate; 21. slide groove; 22. ball bearing; 23. guide block; 24. slide plate; 25. second spring; 26. control rope; 27. magnetic attraction block; 28. second magnetic block; 29. ​​reset rope; 30. rotating shaft; 31. torsion spring. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] See also Figure 1-Figure 11 The present invention provides the following technical solution: an automatic tightening mechanism for assembling a caliper bracket, comprising a body 1, a mounting seat 2, a positioning mechanism 3, a mounting block 4 and a position adjustment mechanism 5, wherein the mounting seat 2 is fixed above the body 1, and the positioning mechanism 3 for providing positioning for the caliper bracket is arranged above the body 1, a mounting block 4 is arranged below the mounting seat 2, and the position adjustment mechanism 5 is connected above the mounting block 4, and the horizontal position of the mounting block 4 is adjusted by the position adjustment mechanism 5.

[0024] Embodiment 1: The invention provides a technical solution, which discloses that a tightening rod 6 is arranged below the mounting block 4, and the upper end of the tightening rod 6 is located inside the mounting block 4, a transmission rod 7 is nested above the tightening rod 6, and a rotation connection is formed between the transmission rod 7 and the mounting block 4, and a rotation driving mechanism is arranged on the outer side of the transmission rod 7 to control the rotation of the transmission rod 7, a vertical control mechanism is arranged above the tightening rod 6 to provide control for the vertical movement of the tightening rod 6, a fixed block 16 is fixed on the outer side of the mounting block 4 to keep the fixed block 16 and the mounting block 4 moving synchronously, a second motor 17 is installed below the fixed block 16, and a rotating feeding shaft 18 is connected below the second motor 17, and the rotating feeding shaft 18 A support block 19 is provided on the outside, and the support block 19 is located below the tightening rod 6 to provide support for the screw, and the support block 19 is arranged at an equal angle to the center of the rotating feeding shaft 18. The support block 19 below the tightening rod 6 is switched by rotating the rotating feeding shaft 18. The support blocks 19 are arranged in pairs, and a through groove is formed in the middle of the paired support blocks 19 to allow the lower end of the screw to pass through, and the inner end of the support block 19 is connected to a support plate 20, and a slide groove 21 is provided inside the rotating feeding shaft 18, and an up and down sliding structure is formed between the support plate 20 and the slide groove 21, and an automatic reset mechanism is provided on the outside of the support plate 20, and a sliding connection is formed between the support block 19 and the support plate 20, and an opening control mechanism is provided on the outside of the support block 19.

[0025] When in use, the caliper bracket to be processed can be placed above the body 1 and positioned by the positioning mechanism 3. The mounting block 4 can be controlled to move by the position adjustment mechanism 5, and the position of the tightening rod 6 can be adjusted to match the screw installation position. The positioning mechanism 3 and the position adjustment mechanism 5 can use existing related technologies. The positioning mechanism 3 positions the caliper bracket, and the position adjustment mechanism 5 controls the horizontal movement of the mounting block 4. Then, the screw on the support block 19 is controlled to move downward by the downward movement and rotation of the tightening rod 6 to install the screw.

[0026] Embodiment 2: Based on embodiment 1, a rotary drive mechanism is disclosed, including a first gear 8, a second gear 9 and a first motor 10. The first gear 8 is fixed on the surface of the transmission rod 7 and rotates synchronously with the transmission rod 7. The second gear 9 is arranged on the outside of the first gear 8, and the second gear 9 and the first gear 8 are meshed and connected. The diameter of the second gear 9 is smaller than that of the first gear 8. The first motor 10 is connected to the second gear 9 to control the rotation of the second gear 9. A transmission block 11 is fixed on the outside of the tightening rod 6. The tightening rod 6 is connected to the transmission block 11 through the transmission block 11. An up and down sliding structure is formed between the rods 7, and the vertical control mechanism includes a first spring 12, a sliding ring 13, a first magnetic block 14 and an electromagnet 15. The first spring 12 is arranged above the tightening rod 6, and the upper end of the first spring 12 is fixedly connected to the mounting block 4. The sliding ring 13 is fixed below the first spring 12, and the lower surface of the sliding ring 13 is in contact with the tightening rod 6. The first magnetic block 14 is fixed to the upper end of the tightening rod 6. The electromagnet 15 is fixed inside the mounting block 4, and the electromagnet 15 is located above the first magnetic block 14. When power is turned on, the first magnetic block 14 is attracted.

[0027] When the tightening rod 6 is needed, the electromagnet 15 can be powered off to release its attraction effect on the first magnetic block 14. The tightening rod 6 will move downward under the action of the first spring 12 and connect with the screw. At the same time, the transmission block 11 slides inside the transmission rod 7. Then the first motor 10 can be started to drive the second gear 9 to rotate. The second gear 9 drives the first gear 8 to rotate, so that the first gear 8 drives the transmission rod 7 to rotate. The transmission rod 7 drives the tightening rod 6 to rotate through the transmission block 11, and the screw is tightened and installed. As the screw moves downward, the first spring 12 can continuously push the tightening rod 6 to move downward, so that it maintains a stable connection with the screw. After tightening is completed, the electromagnet 15 is energized to attract the first magnetic block 14, and the tightening rod 6 is controlled to move upward and reset.

[0028] Embodiment 3: Based on the embodiment 1, an automatic reset mechanism is disclosed, which includes a reset rope 29, a rotating shaft 30 and a torsion spring 31. The reset rope 29 is fixed above the support plate 20. The rotating shaft 30 is rotatably installed inside the rotating feeding shaft 18. The upper end of the reset rope 29 is wound around the surface of the rotating shaft 30. The torsion spring 31 is installed at the end of the rotating shaft 30 to provide a rotation reset force for the rotating shaft 30. A guide block 23 is fixed on the surface of the support block 19. The guide block 23 is inserted into the adjacent support block 19 and the support blocks 19 form a sliding connection. Balls 22 are evenly arranged above the support block 19. The ball 22 contacts the screw head supported by the support block 19. The opening control mechanism includes a slide plate 24, a second spring 25, a control rope 26 and an automatic drive The driving mechanism comprises a slide plate 24, which is fixed on the inner side of the support block 19, and the support block 19 is located inside the support plate 20 and forms a sliding connection with the support plate 20. The second spring 25 is fixed on the outer side of the slide plate 24 to provide thrust for the slide plate 24. The control rope 26 is fixed on the outer side of the slide plate 24 to control the movement of the slide plate 24. The automatic driving mechanism is connected to the control rope 26, and automatically controls the movement of the support block 19 after the support block 19 is lowered. The automatic driving mechanism comprises a magnetic attraction block 27 and a second magnetic block 28. The magnetic attraction block 27 is fixed on the inner end of the control rope 26, and a sliding connection is formed between the magnetic attraction block 27 and the support plate 20. The second magnetic block 28 is fixed on the inside of the rotating feeding shaft 18, and the second magnetic block 28 is located below the support plate 20.

[0029] The screw to be used is inserted into the top of the support block 19 to obtain support. The second motor 17 can control the rotation of the rotating feeding shaft 18 to drive the support block 19 to move, and the screw is moved to the bottom of the tightening rod 6, so as to realize the fast and automatic feeding of the screw. When the tightening rod 6 drives the screw to move downward and rotate, the support plate 20 is synchronously driven to move downward. After the screw is connected, the magnetic attraction block 27 and the second magnetic block 28 are relative. At this time, the magnetic attraction block 27 is attracted to move, driving the control rope 26 to move. The control rope 26 pulls the slide plate 24 to drive the support block 19 to move, and the support block 19 is removed from the upper end of the screw to release the continued support for the screw. At the same time, the torsion spring 31 drives the rotating shaft 30 to reset and rotate, and the reset rope 29 is wound up, and the support plate 20 is pulled upward to reset and move, so that the support block 19 is reset. When the subsequent tightening rod 6 is raised, the rotating feeding shaft 18 can be controlled to rotate to continue to feed the next group of screws. At the same time, the screws can be placed on the empty support block 19 to facilitate subsequent continued use.

[0030] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0031] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An automatic tightening mechanism for assembling a caliper bracket, comprising a body (1), a mounting seat (2), a positioning mechanism (3), a mounting block (4) and a position adjustment mechanism (5), wherein the mounting seat (2) is fixed on the upper part of the body (1), and the upper part of the body (1) is provided with a positioning mechanism (3) for providing positioning for the caliper bracket, the lower part of the mounting seat (2) is provided with a mounting block (4), and the upper part of the mounting block (4) is connected with the position adjustment mechanism (5), and the horizontal position of the mounting block (4) is adjusted by the position adjustment mechanism (5); Features: A tightening rod (6) is arranged below the mounting block (4), and the upper end of the tightening rod (6) is located inside the mounting block (4); a transmission rod (7) is nested above the tightening rod (6), and a rotational connection is formed between the transmission rod (7) and the mounting block (4); a rotation driving mechanism is arranged on the outer side of the transmission rod (7) to control the rotation of the transmission rod (7); a vertical control mechanism is arranged above the tightening rod (6) to control the vertical movement of the tightening rod (6); a fixed block (16) is fixed on the outer side of the mounting block (4) so ​​that the fixed block (16) and the mounting block (4) maintain synchronous movement; a second motor (17) is installed below the fixed block (16), and a rotating feeding shaft (18) is connected below the second motor (17); a support is arranged on the outer side of the rotating feeding shaft (18) The support block (19) is arranged below the tightening rod (6) to provide support for the screw, and the support block (19) and the center of the rotating feeding shaft (18) are arranged at equal angles. The support block (19) below the tightening rod (6) is switched by rotating the rotating feeding shaft (18). The support blocks (19) are arranged in pairs, and a through groove is formed in the middle of the paired support blocks (19) to allow the lower end of the screw to pass through. The inner end of the support block (19) is connected to a support plate (20). A sliding groove (21) is provided inside the rotating feeding shaft (18), and an up-and-down sliding structure is formed between the support plate (20) and the sliding groove (21). An automatic reset mechanism is arranged on the outer side of the support plate (20). A sliding connection is formed between the support block (19) and the support plate (20), and an opening control mechanism is arranged on the outer side of the support block (19).

2. The automatic tightening mechanism for assembling a caliper bracket according to claim 1, characterized in that: The rotary drive mechanism comprises a first gear (8), a second gear (9) and a first motor (10); A first gear (8) is fixed on the surface of the transmission rod (7) and rotates synchronously with the transmission rod (7); A second gear (9) is arranged outside the first gear (8), and the second gear (9) and the first gear (8) are meshedly connected, and the diameter of the second gear (9) is smaller than the diameter of the first gear (8); The first motor (10) is connected to the second gear (9) to control the rotation of the second gear (9).

3. The automatic tightening mechanism for assembling a caliper bracket according to claim 2, characterized in that: A transmission block (11) is fixed to the outer side of the tightening rod (6), and the tightening rod (6) forms an up-and-down sliding structure between the transmission block (11) and the transmission rod (7).

4. An automatic tightening mechanism for assembling a caliper bracket according to claim 2 or 3, characterized in that: The vertical control mechanism comprises a first spring (12), a sliding ring (13), a first magnetic block (14) and an electromagnet (15); A first spring (12) is arranged above the tightening rod (6), and an upper end of the first spring (12) is fixedly connected to the mounting block (4); A sliding ring (13) is fixed below the first spring (12), and a lower surface of the sliding ring (13) is in contact with the tightening rod (6); A first magnetic block (14) is fixed to the upper end of the tightening rod (6); The electromagnet (15) is fixed inside the mounting block (4), and the electromagnet (15) is located above the first magnetic block (14), and attracts the first magnetic block (14) when powered.

5. The automatic tightening mechanism for assembling a caliper bracket according to claim 1, characterized in that: The automatic reset mechanism comprises a reset rope (29), a rotating shaft (30) and a torsion spring (31); A reset rope (29) is fixed above the support plate (20); A rotating shaft (30) is rotatably mounted inside the rotating feeding shaft (18), and the upper end of the reset rope (29) is wound around the surface of the rotating shaft (30); A torsion spring (31) is mounted on the end of the rotating shaft (30) to provide a rotational restoring force for the rotating shaft (30).

6. An automatic tightening mechanism for assembling a caliper bracket according to claim 1 or 5, characterized in that: A guide block (23) is fixed on the surface of the support block (19), and the guide block (23) is inserted into an adjacent support block (19) to form a sliding connection between the support blocks (19).

7. The automatic tightening mechanism for assembling a caliper bracket according to claim 1, characterized in that: Ball bearings (22) are evenly arranged above the support block (19), and the ball bearings (22) are in contact with screw heads supported by the support block (19).

8. The automatic tightening mechanism for assembling a caliper bracket according to claim 1, characterized in that: The opening control mechanism comprises a slide plate (24), a second spring (25), a control rope (26) and an automatic driving mechanism; The slide plate (24) is fixed on the inner side of the support block (19), and the support block (19) is located inside the support plate (20) and is slidably connected to the support plate (20); A second spring (25) is fixed to the outer side of the slide plate (24) to provide a thrust for the slide plate (24); A control rope (26) fixed to the outer side of the slide plate (24) to control the movement of the slide plate (24); The automatic driving mechanism is connected to the control rope (26) and automatically controls the movement of the support block (19) after the support block (19) descends.

9. The automatic tightening mechanism for assembling a caliper bracket according to claim 8, characterized in that: The automatic driving mechanism comprises a magnetic attraction block (27) and a second magnetic block (28); A magnetic attraction block (27) is fixed to the inner end of the control rope (26), and a sliding connection is formed between the magnetic attraction block (27) and the support plate (20); The second magnetic block (28) is fixed inside the rotating feeding shaft (18), and the second magnetic block (28) is located below the supporting plate (20).

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