A floating screw clamping mechanism

Abstract

This application discloses a floating screw clamping mechanism, relating to the field of automatic screw fastening technology. It includes a mounting base with a screw receiving seat. A screw tube passes through the mounting base and connects to the screw receiving seat. A guide rod is slidably inserted into the screw receiving seat. A slide block is slidably mounted on the screw receiving seat, and two clamping members are rotatably mounted on the slide block. The mounting base is equipped with a drive assembly for controlling the rotation and opening / closing of the two clamping members. When the two clamping members are closed, the screw is confined within them. When the two clamping members are open, the screw moves through them. A sensor is installed within the screw receiving seat, and a first elastic element is provided within the screw receiving seat to push the slide block upwards to contact the sensor. In this application, when the screwdriver tip and screw are not fully engaged, the clamping mechanism automatically aligns the screwdriver tip and screw through floating adjustment, thus ensuring torque transmission and improving the screw fastening effect.

Description

Technical Field

[0001] This application relates to the field of automatic screw connection technology, and in particular to a floating screw clamping mechanism. Background Technology

[0002] Automatic screw-driving equipment, through a precision mechanical structure and intelligent control system, achieves rapid and accurate screw feeding and automatic fastening, significantly reducing manual operation and improving fastening consistency and production efficiency. It is widely used in industries such as electronics, home appliances, and automotive parts.

[0003] Currently, when automatic screw-driving equipment is used for screw-on, the screw supply tube delivers the screw to the screw receiving seat. The drive mechanism drives the guide rod to move within the screw receiving seat. The guide rod drives the cutter head at its bottom to connect with the screw through a hexagonal connection. The drive mechanism then drives the cutter head to rotate through the guide rod. The cutter head rotates while moving, thus automatically fastening the screw.

[0004] When the internal hexagonal groove of the screwdriver tip mates with the hexagonal drive part of the screwdriver head, if the engagement depth is insufficient due to misalignment or insufficient axial clamping force, relative slippage will easily occur between the screwdriver tip and the screw drive part at the moment torque is applied. This failure in torque transmission will seriously affect the tightening quality of the screw, causing the preload to fail to reach the design value. Utility Model Content

[0005] To improve the screw fastening effect, this application provides a floating screw clamping mechanism.

[0006] The floating screw clamping mechanism provided in this application adopts the following technical solution:

[0007] A floating screw clamping mechanism includes a mounting base with a screw receiving seat. A screw tube passes through the mounting base and connects to the screw receiving seat. A guide rod is slidably inserted into the screw receiving seat. A slide is slidably mounted on the screw receiving seat. Two clamping members are rotatably mounted on the slide. The mounting base is provided with a drive assembly for controlling the rotation and opening or closing of the two clamping members. When the two clamping members are closed, the screw is confined within the two clamping members. When the two clamping members are opened, the screw moves through the two clamping members. A sensor is provided inside the screw receiving seat, and a first elastic element is provided inside the screw receiving seat for pushing the slide upward to contact the sensor.

[0008] By adopting the above technical solution, the screw supply tube delivers the screw to the screw receiving seat. The two clamping members are in a closed state, restricting the movement of the screw. The guide rod drives the cutting head to move downward. If the cutting head is fully engaged with the screw, the slide will not move. If the cutting head is not fully engaged with the screw, the cutting head will push the two clamping members downward through the screw. The two clamping members will then drive the slide to move downward, separating the slide from the sensor. At this time, the drive mechanism drives the cutting head to rotate slightly forward and backward through the guide rod, so that the cutting head is fully engaged with the screw. The first elastic element then pushes the slide to move upward again to re-contact the sensor. Subsequently, the drive mechanism drives the two clamping members to rotate and open, and the cutting head can then automatically engage the screw. With this setting, when the cutting head is not fully engaged with the screw, the clamping mechanism automatically engages the cutting head with the screw through floating adjustment, thus ensuring that torque transmission does not fail and improving the screw engagement effect.

[0009] Preferably, the clamping member includes a clamping arm and a clamping block. The middle part of the clamping arm is rotatably mounted on the slide via a rotating shaft. The clamping block is fixedly mounted at the bottom end of the clamping arm. The two clamping blocks are located below the discharge port of the nail receiving seat, and each of the two clamping blocks has a receiving groove on its side wall that is close to each other.

[0010] By adopting the above technical solution, the drive component moves the clamping blocks through the clamping arms. When the two clamping blocks move towards each other and come into contact, the screw falls from the screw holder outlet into the receiving groove of the two clamping blocks, thereby restricting the screw. When the two clamping blocks move away from each other, the receiving groove inside the clamping blocks opens, thereby locking the screw.

[0011] Preferably, the clamping block has a through hole at the bottom of the receiving groove, the inner diameter of the through hole is larger than the diameter of the screw body, and the inner diameter of the through hole is smaller than the diameter of the screwdriver head.

[0012] By adopting the above technical solution, when the screw falls into the receiving groove, the screw body can pass through the through hole, while the screw head remains in the receiving groove, thus facilitating the restraint of the screw.

[0013] Preferably, the driving assembly includes a gripper cylinder and two driving fingers. The gripper cylinder is mounted on the mounting base, and the two driving fingers are mounted on the driving end of the gripper cylinder. The two driving fingers move to contact the two gripping arms and cause the two gripping arms to drive the gripping blocks to move towards each other. The slide is provided with second elastic elements on opposite sides. The two second elastic elements abut against the two gripping arms respectively and cause the two gripping arms to drive the gripping blocks to move towards each other.

[0014] By adopting the above technical solution, when it is necessary to close the two clamping blocks, the gripper cylinder drives the two driving fingers to move away from each other, the two driving fingers drive the two clamping arms to rotate, the two clamping arms push the two second elastic elements to contract and deform, and the two clamping arms drive the two clamping blocks to move closer to each other; when it is necessary to open the two clamping blocks, the gripper cylinder drives the two driving fingers to move closer to each other, the two second elastic elements release elastic potential energy and move the two clamping arms to rotate and reset, and the two clamping arms then drive the two clamping blocks to move away from each other.

[0015] Preferably, a push wheel is rotatably provided at the top of the clamping arm, and the driving finger moves to contact the push wheel.

[0016] By adopting the above technical solution, the finger is driven to move and contact the push wheel, which in turn pushes the clamping arm to rotate, thereby making the rotation of the clamping arm more stable.

[0017] Preferably, guide blocks are provided on both opposite side walls of the pin holder, and two guide grooves are symmetrically opened in the slide, with the two guide blocks slidably disposed in the two guide grooves.

[0018] By adopting the above technical solution, when the slide moves on the pin seat, the guide block and the guide groove cooperate to guide the movement of the slide, thereby making the movement of the slide more stable.

[0019] Preferably, a push block is fixedly provided inside the slide block, the top end of the first elastic member abuts against the push block, and the bottom end of the first elastic member abuts against the pin seat.

[0020] By adopting the above technical solution, when the slide moves downward, the slide drives the push block to move downward. The push block moves and squeezes the first elastic element and causes it to contract and deform. When the cutter head is fully engaged with the screw, the first elastic element releases its elastic potential energy and moves the slide upward together with the push block, thereby enabling the slide to move and reset.

[0021] In summary, this application includes at least one of the following beneficial technical effects:

[0022] 1. Utilizing the floating function of the clamping mechanism, if the cutter head and screw are not fully aligned, the cutter head will push the two clamping parts downward through the screw. The two clamping parts will then move the slide downward, causing the slide to separate from the sensor. At this time, the drive mechanism will drive the cutter head to rotate slightly forward and backward through the guide rod, so that the cutter head and screw are fully aligned. The first elastic element will then push the slide to move upward again to re-contact the sensor. Subsequently, the drive mechanism will drive the two clamping parts to rotate and open, and the cutter head can then automatically lock the screw. When the cutter head and screw are not fully aligned, the clamping mechanism will automatically align the cutter head and screw through floating adjustment, so that torque transmission will not fail and the screw locking effect will be improved.

[0023] 2. With the aid of the drive assembly, when it is necessary to close the two clamping blocks, the gripper cylinder drives the two drive fingers to move away from each other, the two drive fingers drive the two clamping arms to rotate, the two clamping arms push the two second elastic elements to contract and deform, and the two clamping arms drive the two clamping blocks to move closer to each other. When it is necessary to open the two clamping blocks, the gripper cylinder drives the two drive fingers to move closer to each other, the two second elastic elements release elastic potential energy and move the two clamping arms to rotate and reset, and the two clamping arms then drive the two clamping blocks to move away from each other.

[0024] 3. When the slide moves downward, the slide moves the push block downward. The push block moves and squeezes the first elastic element and causes it to contract and deform. When the cutter head is fully engaged with the screw, the first elastic element releases its elastic potential energy and moves the slide upward together with the push block, so that the slide can move and reset. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of the floating screw clamping mechanism of this application;

[0026] Figure 2 This is a partial structural diagram of the floating screw clamping mechanism of this application, to highlight the cutting head;

[0027] Figure 3 This is a partial structural schematic diagram of the floating screw clamping mechanism of this application, to highlight the drive component;

[0028] Figure 4 This is an exploded view of part of the structure of the floating screw clamping mechanism of this application.

[0029] Reference numerals: 1. Mounting base; 2. Pin holder; 3. Pin supply tube; 4. Guide rod; 5. Cutting head; 6. Slide; 7. Clamping component; 71. Clamping arm; 72. Clamping block; 8. Drive assembly; 81. Clamping cylinder; 82. Drive finger; 9. Sensor; 10. First elastic element; 11. Receiving groove; 12. Through hole; 13. Second elastic element; 14. Push wheel; 15. Guide block; 16. Guide groove; 17. Push block; 18. Rotating shaft; 19. Connecting plate; 20. Locking bolt. Detailed Implementation

[0030] The following is in conjunction with the appendix Figures 1-4 This application will be described in further detail.

[0031] This application discloses a floating screw clamping mechanism.

[0032] Reference Figure 1 , Figure 2 and Figure 3A floating screw clamping mechanism includes a mounting base 1 fixedly installed on a screw-driving device. A screw receiving seat 2 is fixedly mounted on the bottom of the mounting base 1 via two inclined connecting plates 19. A guide rod 4 slides vertically through the screw receiving seat 2, and a cutting head 5 is mounted at the bottom end of the guide rod 4. An internal hexagonal groove is formed on the bottom wall of the cutting head 5. A screw supply tube 3 passes vertically through the mounting base 1, with its lower half inclined along the direction of the connecting plates 19, and its bottom end connected to the screw receiving seat 2. Screws are fed into the screw receiving seat 2 through the screw supply tube 3, and the guide rod 4 drives the cutting head 5 to operate and automatically screw in the screw.

[0033] Reference Figure 4 A slide block 6 is slidably mounted on the mounting base 1. Guide blocks 15 are fixedly mounted vertically on the opposite side walls of the mounting base 1. Guide grooves 16 are formed on the opposite inner side walls of the slide block 6, and the two guide blocks 15 are slidably mounted in the two guide grooves 16. When the slide block 6 slides on the mounting base 1, the guide blocks 15 and the guide grooves 16 guide the sliding of the slide block 6, making the movement of the slide block 6 more stable.

[0034] The slide block 6 is fixedly mounted with push blocks 17 in the middle of the two guide grooves 16 by locking bolts 20. First elastic elements 10 are mounted on both sides of the pin holder 2 in the width direction. The bottom ends of the two first elastic elements 10 abut against the pin holder 2, and the top ends of the two first elastic elements 10 abut against the two push blocks 17. In this application, the first elastic element 10 can be a spring, and guide posts are formed on the sides of the pin holder 2 and the push blocks 17 that are close to each other. The two guide posts are inserted into the two ends of the first elastic element 10, thereby guiding and limiting the first elastic element 10.

[0035] A sensor 9 is mounted on the top of the pin holder 2, with both ends of the sensor 9 extending out of the pin holder 2 along its width. The first elastic element 10 drives the slide 6 to move upward via the push block 17, and after the slide 6 moves upward, its top end abuts against the sensor 9.

[0036] Two clamping parts 7 are symmetrically mounted on the slide 6 along its width direction. A drive assembly 8 is mounted on the mounting base 1. The drive assembly 8 is used to control the rotation of the two clamping parts 7 to open or close. The drive assembly 8 consists of a gripper cylinder 81 and two drive fingers 82. The gripper cylinder 81 is fixedly mounted on the mounting base 1, and the two drive fingers 82 are mounted on the drive end of the gripper cylinder 81.

[0037] The clamping member 7 consists of a clamping arm 71 and a clamping block 72. A rotating shaft 18 is fixedly installed inside the slide 6, and the middle part of the clamping arm 71 is rotatably mounted on the rotating shaft 18. A push wheel 14 is rotatably mounted on the top end of the clamping arm 71, and the clamping block 72 is fixedly installed on the bottom end of the clamping arm 71. Second elastic members 13 are installed on both sides of the slide 6 in the width direction, and the ends of the two second elastic members 13 away from the slide 6 respectively abut against the two clamping arms 71. In this application, the second elastic members 13 can be selected as springs, and grooves are formed on both the slide 6 and the clamping arms 71, with both ends of the second elastic members 13 located in the grooves.

[0038] When the gripper cylinder 81 drives the two driving fingers 82 to move away from each other, the two driving fingers 82 drive the two gripping arms 71 to rotate via the push wheel 14. The two gripping arms 71 push the two second elastic elements 13 to contract and deform, and the two gripping arms 71 drive the two gripping blocks 72 to move towards each other. When the gripper cylinder 81 drives the two driving fingers 82 to move towards each other, the two second elastic elements 13 release elastic potential energy and move the two gripping arms 71 to rotate and reset. The two gripping arms 71 then drive the two gripping blocks 72 to move away from each other.

[0039] Each of the two clamping blocks 72 has a receiving groove 11 on its adjacent sidewalls, the inner diameter of which is larger than the diameter of the screwdriver head. Each of the two clamping blocks 72 has a through hole 12 at its bottom, the inner diameter of which is smaller than the diameter of the screwdriver head and larger than the diameter of the screw body. When the screw falls into the receiving groove 11 and the two clamping blocks 72 move to close, the screw body can pass through the through hole 12, while the screw head remains in the receiving groove 11, thus confining the screw.

[0040] The implementation principle of the floating screw clamping mechanism in this application embodiment is as follows: After the screw supply system delivers the screw to the screw receiving seat 2 through the screw supply pipe 3, the two clamping members 7 are in a closed state to constrain the screw's degree of freedom. The guide rod 4 drives the cutting head 5 to move downward. If the cutting head 5 and the screw are fully aligned, the slide 6 remains stationary; if there is a deviation in alignment, the cutting head 5 will push the two clamping members 7 to move axially through the screw, thereby causing the slide 6 to move downward and disengage from the sensor 9. At this time, the drive mechanism starts, controlling the cutting head 5 to perform small-angle forward and reverse rotation through the guide rod 4 to achieve automatic alignment and connection between the cutting head 5 and the screw. Subsequently, under the action of the first elastic element 10, the slide 6 resets and re-contacts the sensor 9; the drive mechanism then drives the two clamping members 7 to rotate and open, and the cutting head 5 can then drive the screw to complete the subsequent fastening process. The floating screw clamping mechanism can achieve automatic alignment through position feedback and active correction when the alignment between the cutting head 5 and the screw is not perfect, ensuring effective torque transmission and significantly improving the screw fastening quality and reliability.

[0041] The above are merely optional embodiments of this disclosure and are not intended to limit this disclosure. Various modifications and variations can be made to this disclosure by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this disclosure should be included within the scope of protection of this disclosure.

Claims

1. A floating screw clamping mechanism characterized by: The device includes a mounting base (1), on which a nail receiving seat (2) is provided. A nail supply tube (3) passes through the mounting base (1) and connects to the nail receiving seat (2). A guide rod (4) is slidably inserted into the nail receiving seat (2). A slide (6) is slidably provided on the nail receiving seat (2). Two clamping members (7) are rotatably provided on the slide (6). A drive assembly (8) is provided on the mounting base (1) for controlling the rotation of the two clamping members (7) to open or close. When the two clamping members (7) are closed, the screw is confined within the two clamping members (7). When the two clamping members (7) are opened, the screw moves through the two clamping members (7). A sensor (9) is provided inside the nail receiving seat (2). A first elastic member (10) is provided inside the nail receiving seat (2) for pushing the slide (6) to slide upward to contact the sensor (9).

2. A floating screw clamp mechanism according to claim 1, wherein: The clamping member (7) includes a clamping arm (71) and a clamping block (72). The middle part of the clamping arm (71) is rotatably mounted on the slide (6) via a rotating shaft (18). The clamping block (72) is fixedly mounted on the bottom end of the clamping arm (71). The two clamping blocks (72) are located below the discharge port of the nail receiving seat (2), and each of the two clamping blocks (72) has a receiving groove (11) on its side wall that is close to each other.

3. A floating screw clamp mechanism according to claim 2, wherein: The clamping block (72) has a through hole (12) at the bottom of the receiving groove (11). The inner diameter of the through hole (12) is larger than the diameter of the screw body, and the inner diameter of the through hole (12) is smaller than the diameter of the screwdriver head.

4. A floating screw clamp mechanism according to claim 2, wherein: The drive assembly (8) includes a gripper cylinder (81) and two drive fingers (82). The gripper cylinder (81) is mounted on the mounting base (1), and the two drive fingers (82) are mounted on the drive end of the gripper cylinder (81). The two drive fingers (82) move to contact the two gripping arms (71) and cause the two gripping arms (71) to drive the gripping blocks (72) to move towards each other. The slide (6) is provided with second elastic elements (13) on both sides. The two second elastic elements (13) abut against the two gripping arms (71) respectively and cause the two gripping arms (71) to drive the gripping blocks (72) to move towards each other.

5. A floating screw clamp mechanism according to claim 4, wherein: The top of the clamping arm (71) is rotatably provided with a push wheel (14), and the driving finger (82) moves to contact the push wheel (14).

6. A floating screw clamp mechanism according to claim 1, wherein: Guide blocks (15) are provided on both opposite side walls of the pin holder (2), and two guide grooves (16) are symmetrically opened in the slide (6), with the two guide blocks (15) slidably disposed in the two guide grooves (16).

7. A floating screw clamp mechanism as claimed in claim 1, wherein: A push block (17) is fixedly installed inside the slide (6). The top end of the first elastic member (10) abuts against the push block (17), and the bottom end of the first elastic member (10) abuts against the pin seat (2).

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