Automatic tightening mechanism for caliper support assembly

Abstract

The application discloses a kind of automatic tightening mechanisms for caliper support assembly, it is related to industrial assembly field, including machine body, mounting seat, positioning mechanism, mounting block and position adjusting mechanism, the mounting seat is fixed above the machine body, and the top of machine body is provided with the positioning mechanism for providing the positioning of caliper support, the lower portion of mounting seat is provided with mounting block, and the upper portion of mounting block is connected with position adjusting mechanism, the horizontal position of mounting block is adjusted by position adjusting mechanism, the lower portion of mounting block is provided with tightening rod, and the upper end of tightening rod is located inside mounting block.The automatic tightening mechanism for caliper support assembly can make screw continuous feeding by the setting of multiple groups of supporting blocks and the cooperation of rotating feeding shaft, the rotation of rotating feeding shaft can control the movement of supporting block under tightening rod, automatically feed screw, and the empty supporting block can continue to place screw after screw feeding is completed, which is convenient for subsequent processing.

Description

Technical Field

[0001] This invention relates to the field of industrial assembly technology, specifically to an automatic tightening mechanism for assembling caliper brackets. Background Technology

[0002] When assembling caliper brackets, they are usually tightened by the interlocking of screws and nuts. This can be done manually or automatically by industrial robots. Currently, automated tightening using robotic arms is gradually replacing manual tightening.

[0003] Prior art 1 (Chinese patent application number CN201921989551.X, published on September 1, 2020) discloses an automatic tightening workbench for caliper bracket assembly, comprising a frame, a caliper bracket positioning mechanism, a guide rod anti-rotation mechanism, and a screw tightening mechanism. The frame is provided with a vertical lifting plate and a horizontal moving plate. The vertical lifting plate is located below the horizontal moving plate. The caliper bracket positioning mechanism is fixedly connected to the vertical lifting plate. The screw tightening mechanism and the guide rod anti-rotation mechanism are slidably connected to the horizontal moving plate. The vertical lifting plate moves along the vertical Z-axis under the action of a first driving source, and the horizontal moving plate moves along the horizontal X and Y directions under the action of a second driving source. The screw tightening mechanism moves closer to or further away from the guide rod anti-rotation mechanism under the action of a third driving source. Not only is the structure simple and highly versatile, but it also ensures the guide rod's anti-rotation limit during the assembly of the clamp body and bracket, improving the bolt tightening accuracy. Existing technology 2 (Chinese patent application number CN202122675054.6, published March 15, 2022) describes a combination device for a screw assembly machine, relating to the field of screw assembly technology. Addressing the problem of high labor intensity and low production efficiency in existing screw and nut assembly processes, which are generally completed manually or with simple tools, the proposed solution includes a housing and a support frame. The support frame is fixedly installed at the top of the housing. A PLC controller is fixedly installed on the side wall of the support frame. A hydraulic cylinder is fixedly installed at the top of the support frame, and an electric screwdriver is fixedly installed at the piston rod end of the hydraulic cylinder. A transmission mechanism is installed between the housing and the support frame, and a clamping mechanism is installed between the housing and the support frame. The clamping mechanism includes sliders, and two sliders slide against each other on a limiting rod. This not only provides automatic screw and nut assembly but also improves screw removal efficiency, making it suitable for widespread application.

[0004] Current caliper bracket assembly automatic tightening mechanisms or other tightening mechanisms control the vertical movement of the tightening mechanism via an electric telescopic rod. The movement and rotation speed must be matched; otherwise, stripping of the screws can easily occur. Furthermore, if the telescopic rod's extension distance exceeds the screw's movement distance, it can easily damage the screw. Moreover, current tightening mechanisms can only tighten one screw at a time. After tightening, readjusting the equipment position requires reinstalling the screw, which is time-consuming and reduces overall tightening efficiency and ease of use. Summary of the Invention

[0005] The purpose of this invention is to provide an automatic tightening mechanism for caliper bracket assembly, in order to solve the problems mentioned in the background art, which require the vertical movement of the tightening mechanism controlled by the electric telescopic rod to be matched with its rotation speed, otherwise stripping of the screw is likely to occur, or the telescopic rod's extension distance may exceed the screw's movement distance, which may also cause damage to the screw. Furthermore, current tightening mechanisms can only tighten one screw at a time when controlling the tightening of the screw, and the screw needs to be reinstalled after the equipment position is readjusted after the screw is tightened.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an automatic tightening mechanism for assembling a caliper bracket, comprising a body, a mounting base, a positioning mechanism, a mounting block, and a position adjustment mechanism. The mounting base is fixed above the body, and a positioning mechanism for positioning the caliper bracket is provided above the body. A mounting block is provided below the mounting base, and a position adjustment mechanism is connected above the mounting block to adjust the horizontal position of the mounting block. A tightening rod is provided 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 the transmission rod and the mounting block are rotatably connected. A rotation drive mechanism is provided outside the transmission rod to control its rotation. A vertical control mechanism is provided above the tightening rod to control its vertical movement. The mounting block is fixed to a fixed block on its outer side, allowing the fixed block and the mounting block to move synchronously. A second motor is installed below the fixed block, and a rotating feeding shaft is connected below the second motor. A support block is provided on the outer side of the rotating feeding shaft, and the support block is located below the tightening rod to provide support for the screw. The support block is set at an equal angle to the center of the rotating feeding shaft. The rotation of the rotating feeding shaft switches the support block below the tightening rod. The support blocks are arranged in pairs, and a through groove is formed in the middle of the pair of support blocks, allowing the lower end of the screw to pass through. A support plate is connected to the inner end of the support block. A sliding groove is opened inside the rotating feeding shaft, and the support plate and the sliding groove form an up-and-down sliding structure. An automatic reset mechanism is provided on the outer side of the support plate. The support block and the support plate form a sliding connection, and an opening control mechanism is provided on the outer side of the support block.

[0007] To further optimize this technical solution, the rotary drive mechanism includes a first gear, a second gear, and a first motor; The first gear is fixed to the surface of the transmission rod and rotates synchronously with the transmission rod; The second gear is mounted on the outside of the first gear, and the second gear and the first gear are meshed together, 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 this technical solution, a transmission block is fixed to the outside of the tightening rod, and the tightening rod forms an up-and-down sliding structure through the transmission block and the transmission rod.

[0009] To further optimize this technical solution, the vertical control mechanism includes a first spring, a sliding ring, a first magnetic block, and an electromagnet; The first spring is positioned above the tightening rod, and its upper end is fixedly connected to the mounting block. The sliding ring is fixed below the first spring, and the lower surface of the sliding ring is in contact with the tightening rod; The first magnetic block is fixed to the upper end of the tightening rod; An electromagnet is fixed inside the mounting block and positioned above the first magnetic block. When energized, the electromagnet attracts the first magnetic block.

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

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

[0012] To further optimize this technical solution, ball bearings are evenly arranged above the support block, and the ball bearings are in contact with the screw heads supporting the support block.

[0013] To further optimize this technical solution, the opening control mechanism includes a sliding plate, a second spring, a control rope, and an automatic drive mechanism; The slide plate is fixed to the inside of the support block, and the support block is located inside the support plate and forms a sliding connection with the support plate; The second spring is fixed to the outside of the skateboard to provide thrust to the skateboard; The control rope is fixed to the outside of the skateboard to control its movement. The automatic drive mechanism, connected to the control rope, automatically controls the movement of the support block after it descends.

[0014] To further optimize this 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 is located below the support plate.

[0015] Compared with the prior art, the beneficial effects of the present invention are: The screw is tightened by a tightening rod, which can automatically move downward under the action of the first spring, so that it can automatically tighten as the screw is tightened, ensuring the tightening effect. At the same time, the attraction of the first magnetic block by the electromagnet can control the tightening rod to move upward for reset, making the tightening control simpler.

[0016] The support block provides support for the screw, facilitating subsequent screw installation. Furthermore, the support block moves synchronously with the tightening rod under the connection of the mounting block and the fixing block, ensuring that it always remains below the tightening rod, making it convenient to tighten screws in different positions.

[0017] The movement of the support block releases its support on the screw head, allowing the screw to be installed smoothly. After the support block is released, it automatically returns to its original position without affecting subsequent use.

[0018] By using multiple sets of support blocks in conjunction with a rotating feeding shaft, screws can be continuously fed. The rotation of the feeding shaft controls the movement of the support blocks under the tightening rod, automatically feeding the screws. After the screws are fed, the empty support blocks can be used to place more screws, facilitating subsequent processing and improving the screw feeding efficiency. This, in turn, improves the overall tightening efficiency and ease of use of the tightening mechanism.

[0019] The mutual attraction between the second magnetic block and the magnetic attraction block allows the movement of the support block to be automatically controlled after the support plate moves down. This enables the support block to 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 facilitates the continued use of the support block in the future. Attached Figure Description

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

[0021] In the diagram: 1. Machine body; 2. Mounting base; 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. Sliding ring; 14. First magnetic block; 15. Electromagnet; 16. Fixing block; 17. Second motor; 18. Rotary 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 Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Please see Figures 1-11 The present invention provides the following technical solution: an automatic tightening mechanism for assembling a caliper bracket, comprising a body 1, a mounting base 2, a positioning mechanism 3, a mounting block 4, and a position adjustment mechanism 5. The mounting base 2 is fixed above the body 1, and the positioning mechanism 3 is provided above the body 1 to position the caliper bracket. The mounting block 4 is provided below the mounting base 2, and the position adjustment mechanism 5 is connected above the mounting block 4. The horizontal position of the mounting block 4 is adjusted by the position adjustment mechanism 5.

[0024] Example 1: The invention provides a technical solution in which a tightening rod 6 is provided 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 the transmission rod 7 and the mounting block 4 are rotatably connected. A rotary drive mechanism is provided on the outside of the transmission rod 7 to control the rotation of the transmission rod 7. A vertical control mechanism is provided above the tightening rod 6 to control the vertical movement of the tightening rod 6. A fixing block 16 is fixed on the outside of the mounting block 4 to keep the fixing block 16 and the mounting block 4 moving synchronously. A second motor 17 is installed below the fixing block 16, and a rotary feeding shaft 18 is connected below the second motor 17. A support block 19 is provided on the outer side, and the support block 19 is located below the tightening rod 6 to provide support for the screw. The support block 19 is set at the same angle as 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 pair of support blocks 19 so that the lower end of the screw can pass through. The inner end of the support block 19 is connected to the support plate 20. The rotating feeding shaft 18 has a sliding groove 21 inside. The support plate 20 and the sliding groove 21 form an up-and-down sliding structure. An automatic reset mechanism is provided on the outer side of the support plate 20. The support block 19 and the support plate 20 form a sliding connection. An opening control mechanism is provided on the outer side of the support block 19.

[0025] In use, the caliper bracket to be processed can be placed on top of the machine body 1 and positioned by the positioning mechanism 3. The position adjustment mechanism 5 can control the movement of the mounting block 4 and adjust the position of the tightening rod 6 to match the screw installation position. The positioning mechanism 3 and the position adjustment mechanism 5 can adopt existing related technologies. The positioning mechanism 3 positions the caliper bracket, the position adjustment mechanism 5 controls the horizontal movement of the mounting block 4, and then the screw on the support block 19 is moved downward by the downward movement and rotation of the tightening rod 6 to install the screw.

[0026] Example 2: Based on Example 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 to the surface of the transmission rod 7 and rotates synchronously with the transmission rod 7. The second gear 9 is disposed on the outside of the first gear 8, and the second gear 9 and the first gear 8 form a meshing connection. 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. A transmission block 11 is fixed to the outside of the tightening rod 6, and the tightening rod 6 is connected to the transmission block 11 via the transmission block 11. The rods 7 form an up-and-down sliding structure. 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 located above the tightening rod 6, and its upper end is fixedly connected to the mounting block 4. The sliding ring 13 is fixed below the first spring 12, and its lower surface is in contact with the tightening rod 6. The first magnetic block 14 is fixed at the upper end of the tightening rod 6. The electromagnet 15 is fixed inside the mounting block 4, and its position is above the first magnetic block 14. When energized, the electromagnet attracts the first magnetic block 14.

[0027] When tightening rod 6 is needed, electromagnet 15 can be de-energized to release its attraction to the first magnetic block 14. Tightening rod 6 will then move downward under the action of the first spring 12 and connect with the screw. At the same time, transmission block 11 slides inside 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, which in turn drives the transmission rod 7 to rotate. Transmission rod 7 drives tightening rod 6 to rotate through transmission block 11, tightening the screw. As the screw moves downward, the first spring 12 continuously pushes tightening rod 6 downward to maintain a stable connection with the screw. After tightening, electromagnet 15 is energized again to attract the first magnetic block 14, controlling tightening rod 6 to move upward and reset.

[0028] Example 3: Based on Example 1, an automatic reset mechanism is disclosed, comprising 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 mounted 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 rotational reset force. A guide block 23 is fixed to the surface of the support block 19. The guide block 23 is inserted into the adjacent support block 19 and forms a sliding connection with the support block 19. Ball bearings 22 are evenly arranged above the support block 19. The ball bearings 22 contact the screw heads supporting 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 mechanism. The moving mechanism includes a sliding plate 24, which is fixed to 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. A second spring 25 is fixed to the outer side of the sliding plate 24 to provide thrust to the sliding plate 24. A control rope 26 is fixed to the outer side of the sliding plate 24 to control the movement of the sliding plate 24. An automatic drive mechanism is connected to the control rope 26 and automatically controls the movement of the support block 19 after it descends. The automatic drive mechanism includes a magnetic attraction block 27 and a second magnetic block 28. The magnetic attraction block 27 is fixed to the inner end of the control rope 26 and forms a sliding connection with the support plate 20. The second magnetic block 28 is fixed inside the rotating feeding shaft 18 and is located below the support plate 20.

[0029] The screw to be used is inserted above the support block 19 for support. The second motor 17 controls the rotation of the rotating feeding shaft 18, which moves the support block 19 to move the screw below the tightening rod 6, enabling fast and automatic screw feeding. When the tightening rod 6 moves the screw downward, it simultaneously moves the support plate 20 downward. After the screw is connected, the magnetic attraction block 27 and the second magnetic block 28 are opposite each other. At this time, the magnetic attraction block 27 is attracted and moves, which moves the control rope 26. The control rope 26 pulls the slide plate 24, which moves the support block 19, removing the support block 19 from the top of the screw and releasing the screw from further support. At the same time, the torsion spring 31 drives the rotating shaft 30 to rotate back, winding the reset rope 29 and pulling the support plate 20 upward to reset the support block 19. When the tightening rod 6 rises, the rotating feeding shaft 18 can be controlled to rotate to continue feeding the next set of screws. At the same time, the empty support block 19 can be used to place screws for subsequent use.

[0030] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

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

Claims

1. An automatic tightening mechanism for assembling a caliper bracket, comprising a body (1), a mounting base (2), a positioning mechanism (3), a mounting block (4), and a position adjustment mechanism (5), wherein the mounting base (2) is fixed above the body (1), and a positioning mechanism (3) for positioning the caliper bracket is provided above the body (1), and a mounting block (4) is provided below the mounting base (2), and a position adjustment mechanism (5) is connected above the mounting block (4), wherein the horizontal position of the mounting block (4) is adjusted by the position adjustment mechanism (5); Its features are: A tightening rod (6) is provided 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 the transmission rod (7) and the mounting block (4) are rotatably connected. A rotary drive mechanism is provided on the outside of the transmission rod (7) to control the rotation of the transmission rod (7). A vertical control mechanism is provided above the tightening rod (6) to control the vertical movement of the tightening rod (6). A fixing block (16) is fixed on the outside of the mounting block (4) to keep the fixing block (16) and the mounting block (4) moving synchronously. A second motor (17) is installed below the fixing block (16), and a rotary feeding shaft (18) is connected below the second motor (17). A support is provided on the outside of the rotary feeding shaft (18). Block (19), and support block (19) is located below tightening rod (6) to provide support for screw. Support block (19) is set at the center of rotating feeding shaft (18) at the same angle. The support block (19) below tightening rod (6) is switched by rotating feeding shaft (18). The support blocks (19) are set in pairs, and a through groove is formed in the middle of the pair of support blocks (19) so that the lower end of the screw can pass through. The inner end of support block (19) is connected to support plate (20). The inside of rotating feeding shaft (18) is provided with sliding groove (21). Support plate (20) and sliding groove (21) form an up-and-down sliding structure. Automatic reset mechanism is provided on the outside of support plate (20). Support block (19) and support plate (20) form a sliding connection. Opening control mechanism is provided on the outside of support block (19). 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 set 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); An electromagnet (15) is fixed inside the mounting block (4) and is located above the first magnetic block (14). When energized, the electromagnet attracts the first magnetic block (14). The automatic reset mechanism 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), and the upper end of the reset rope (29) is wound around the surface of the rotating shaft (30); A torsion spring (31) is installed at the end of the rotating shaft (30) to provide rotational restoring force to the rotating shaft (30).

2. The automatic tightening mechanism for assembling a caliper bracket according to claim 1, characterized in that: The rotary drive mechanism includes 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 mounted on the outside of the first gear (8), and the second gear (9) and the first gear (8) are meshed together, 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 outside 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. The automatic tightening mechanism for assembling a caliper bracket according to claim 3, characterized in that: The surface of the support block (19) is fixed with a guide block (23), which is inserted into the adjacent support block (19) and forms a sliding connection between the support blocks (19).

5. The automatic tightening mechanism for assembling a caliper bracket according to claim 4, characterized in that: Ball bearings (22) are evenly arranged above the support block (19), and the ball bearings (22) are in contact with the screw heads supported by the support block (19).

6. The automatic tightening mechanism for assembling a caliper bracket according to claim 5, characterized in that: The opening control mechanism includes a sliding plate (24), a second spring (25), a control rope (26), and an automatic drive mechanism; The slide plate (24) is fixed to the inside 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 to the outside of the skateboard (24) to provide thrust to the skateboard (24); The control rope (26) is fixed to the outside of the skateboard (24) to control the movement of the skateboard (24); An automatic drive mechanism is connected to a control rope (26) and automatically controls the movement of the support block (19) after it descends.

7. The automatic tightening mechanism for assembling a caliper bracket according to claim 6, characterized in that: The automatic drive mechanism includes 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 is located below the support plate (20).

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