A PCBA board bracket screw locking machine

Abstract

The present invention relates to the technical field of PCBA production equipment, and provides a PCBA board bracket screw locking machine, which includes a driving motor. The output end of the driving motor is connected to a driving rod, and the driving rod is connected to a screwdriver bit through a torsion mechanism so as to automatically disconnect the thrust transmission when the screwdriver bit encounters excessive resistance. The present invention overcomes the deficiencies of the prior art, is reasonably designed and has a compact structure. Through the design of the torsion mechanism, it can automatically disconnect the thrust transmission when the screw is tightened or blocked, protecting the equipment and workpieces from damage. At the same time, the cooperation of the transmission column with the slider and the driving groove avoids the re-pushing of the driving inertial force on the screwdriver bit when the driving mechanism stops, further improving the safety. When the screw head is damaged and the screwdriver bit cannot drive the screw to rotate, it can automatically stop the driving motor and the locking cylinder, effectively preventing the PCBA board and the bracket from being damaged due to the screw being pressed in, achieving the effect of intelligent anti-fooling.

Description

Technical Field

[0001] The present invention relates to the technical field of PCBA production equipment, and particularly relates to a screwing machine for PCBA board brackets. Background Art

[0002] In the electronics manufacturing industry, the screwing of screws for PCBA (Printed Circuit Board Assembly) board brackets is a crucial link, which directly relates to the assembly quality, stability and durability of electronic products. Traditional screw screwing methods mostly adopt manual operation. This method not only has low efficiency, but also easily causes problems such as inconsistent screwing force, screw damage or damage to the PCBA board and brackets due to human factors. With the continuous development of automation technology, automated screw screwing machines have gradually replaced the traditional manual operation method.

[0003] However, existing automated screw screwing machines still have some deficiencies. For example, some automated screw screwing machines lack an effective torque control mechanism during the screwing process. When the screw is tightened or encounters excessive resistance, it cannot stop driving in time, which may cause damage to the PCBA board and brackets. Therefore, we propose a screwing machine for PCBA board brackets. Summary of the Invention

[0004] (1) Technical Problems to be Solved

[0005] Aiming at the deficiencies of the prior art, the present invention provides a screwing machine for PCBA board brackets, which overcomes the deficiencies of the prior art, is reasonably designed, has a compact structure, and solves the problem that the driving cannot be stopped in time when the existing screw is tightened or encounters excessive resistance.

[0006] (2) Technical Solutions

[0007] To achieve the above object, the present invention is realized through the following technical solutions: A screwing machine for PCBA board brackets includes a driving motor, the output end of the driving motor is connected to a driving rod, and the driving rod is connected to a screw bit through a torque mechanism so as to automatically disconnect the thrust transmission when the screw bit encounters excessive resistance.

[0008] The torque mechanism includes a driving column connected to the driving rod. The outer surface of the driving column is symmetrically provided with inclined driving grooves along its circumference. A receiving groove is provided at the bottom of each driving groove. A sliding groove is provided on one side of the receiving groove. A slider supported by a support spring is slidably connected inside the sliding groove. A shutdown button is provided inside the sliding groove corresponding to the sliding direction of the slider. The shutdown button is electrically connected to the driving motor and is used to stop the operation of the driving motor when triggered.

[0009] The torque mechanism also includes a sliding disk connected to the screwdriver head, a pair of vertical plates are provided on the top of the sliding disk, and a transmission column corresponding to the accommodating groove is provided on one side of each vertical plate. The transmission column is inserted into the accommodating groove and is located at the bottom of the end of the slider, so that when the driving column applies excessive thrust to the transmission column, the slider is forced to trigger the stop button.

[0010] Preferably, a sliding plate is provided on the back of the driving motor, a sliding rail is provided on the back of the sliding plate for sliding, a mounting base is provided on the back of the sliding rail, a locking cylinder is provided on the mounting base, and the output end of the locking cylinder is connected to the sliding plate to push the sliding plate to slide along the sliding rail.

[0011] Preferably, a U-shaped positioning plate is provided at the bottom of the sliding plate, a feed pipe is provided on one side of the U-shaped positioning plate, a pair of clamps are provided in the U-shaped positioning plate, a space for a screwdriver head to pass through is reserved between the pair of clamps, and the pair of clamps are arranged below the discharge port at the bottom of the feed pipe to clamp the screws falling through the feed pipe.

[0012] Preferably, the opposite sides of the clamping jaws on both sides are provided with mutually matching clamping grooves for clamping the screws falling through the feed pipe, and the clamping groove is laterally provided with an arc groove, and the interior of the arc groove is provided with a connecting spring, a trigger block and a trigger button, the connecting spring connects the arc groove and the trigger block, and the outer wall of the trigger block exceeds the arc groove to form a clamping force on the screw between the two clamping jaws, the trigger block is slidably connected in the arc groove, and when the screw is turned and rotated by the screwdriver head, the trigger block triggers the trigger button, and the trigger button is electrically connected to the drive motor and the locking cylinder to control the drive motor and the locking cylinder to stop.

[0013] Preferably, a clamping cylinder is provided on the side of the U-shaped positioning plate facing away from the feed pipe, and a push block is provided at the output end of the clamping cylinder. A pair of inclined grooves are opened inside the push block, and a push column is slidably connected in each of the inclined grooves. The clamping claw is rotatably connected in the U-shaped positioning plate, and one side of the clamping claw is connected to the push column. When the push block moves, the two clamping claws are separated or clamped.

[0014] Preferably, a vertical slot for accommodating the torque mechanism is provided in the sliding plate, and the sliding disk is rotatably connected in the vertical slot to limit the position of the screwdriver head.

[0015] Preferably, the bottom of the driving column and the bottom of the sliding plate have a space for the driving column to move downward.

[0016] Preferably, the bottom of the sliding block facing one end of the transmission column is an arc-shaped inclined surface that fits the outer wall of the transmission column, and the top is an inclined surface, so that the transmission column can push it from the upper side of the transmission column to move into the sliding groove.

[0017] (III) Beneficial effects

[0018] The embodiment of the present invention provides a PCBA board bracket screw locking machine, which has the following beneficial effects:

[0019] 1. Through the design of the torque mechanism, the thrust transmission can be automatically disconnected when the screw is tightened or blocked, protecting the equipment and workpieces from damage. At the same time, the cooperation of the transmission column with the slider and the driving groove avoids the re-pushing of the driving inertia force on the screw bit when the driving mechanism stops, further improving the safety.

[0020] 2. When the head of the screw is damaged and the screw bit cannot drive the screw to rotate, the driving motor and the locking cylinder can be automatically stopped, effectively preventing the PCBA board and the bracket from being damaged due to the screw being pressed in, achieving the effect of intelligent anti-fooling. Description of the Drawings

[0021] Figure 1 It is the front three-dimensional schematic diagram of the overall structure of the present invention;

[0022] Figure 2 It is the back three-dimensional schematic diagram of the overall structure of the present invention;

[0023] Figure 3 It is the sectional schematic diagram of the driving rod structure of the present invention;

[0024] Figure 4 It is the sectional schematic diagram of the vertical groove structure inside the sliding plate of the present invention;

[0025] Figure 5 It is the three-dimensional schematic diagram of the torque mechanism structure of the present invention;

[0026] Figure 6 It is the three-dimensional schematic diagram of the accommodation groove structure of the present invention;

[0027] Figure 7 It is the sectional three-dimensional schematic diagram of the driving column structure of the present invention;

[0028] Figure 8 It is the front three-dimensional schematic diagram of the jaw structure of the present invention;

[0029] Figure 9 It is the top three-dimensional schematic diagram of the jaw structure of the present invention;

[0030] Figure 10 It is the three-dimensional schematic diagram of the clamping groove structure of the present invention.

[0031] In the figure: 1. Driving motor; 2. Driving rod; 21. Driving column; 22. Driving groove; 23. Accommodating groove; 24. Sliding groove; 25. Slide block; 26. Support spring; 27. Shut-down button; 3. Screwdriver bit; 31. Sliding plate; 32. Vertical plate; 33. Transmission column; 4. Sliding plate; 5. Slide rail; 6. Installation base plate; 7. Locking cylinder; 8. U-shaped positioning plate; 9. Feed pipe; 10. Claw; 101. Clamping groove; 102. Arc groove; 103. Connecting spring; 104. Trigger block; 105. Trigger button; 11. Clamping cylinder; 12. Push block; 13. Inclined groove; 14. Push column. Detailed implementation manner

[0032] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0033] Referring to the attached Figures 1-10 , a PCBA board bracket screw locking machine includes a driving motor 1 as a driving source. The output end of the driving motor 1 is connected to a driving rod 2. The driving rod 2 is connected to a screwdriver bit 3 through a torque mechanism so as to automatically disconnect the thrust transmission when the screwdriver bit 3 encounters excessive resistance. When the driving motor 1 is started, the driving rod 2 rotates accordingly, and drives the screwdriver bit 3 to rotate through the torque mechanism, thereby performing the screw locking function;

[0034] The torque mechanism includes a driving column 21 connected to the driving rod 2. The outer surface of the driving column 21 is symmetrically provided with inclined driving grooves 22 along its circumference. The bottom of each driving groove 22 is provided with an accommodating groove 23. One side of the accommodating groove 23 is provided with a sliding groove 24. A slide block 25 supported by a support spring 26 is slidably connected inside the sliding groove 24. A shut-down button 27 is arranged inside the sliding groove 24 corresponding to the sliding direction of the slide block 25. The shut-down button 27 is electrically connected to the driving motor 1 and is used to stop the operation of the driving motor 1 when triggered;

[0035] The torque mechanism further includes a sliding plate 31 connected to the screwdriver bit 3. A pair of vertical plates 32 are arranged on the top of the sliding plate 31. A transmission column 33 corresponding to the accommodating groove 23 is arranged on one side of each vertical plate 32. The transmission column 33 is inserted into the accommodating groove 23 and is located at the bottom of the end of the slide block 25, so as to force the slide block 25 to trigger the shut-down button 27 when the driving column 21 applies excessive thrust to the transmission column 33.

[0036] When using the screwdriver bit 3 to turn the screw, start the drive motor 1. At this time, the drive rod 2 drives the screwdriver bit 3 to work through the torque mechanism. When turning the screw, the whole screwdriver bit 3 will move downward during the rotation process so that the screw can be screwed into the bracket. Therefore, the drive rod 2 will move downward during the rotation process, that is, the drive column 21 will also move downward during the rotation process. When the screw is tightened or subjected to other forms of excessive resistance, at this time, the resistance received by the screwdriver bit 3 increases and it stops rotating. At this time, the transmission column 33 located in the receiving groove 23 will also stop rotating. Since the drive column 21 moves downward relative to the transmission column 33 during the rotation process, the transmission column 33 will push the slider 25 to move into the inside of the chute 24, and then the shutdown button 27 is triggered. At this time, the drive motor 1 stops working, and the drive mechanism that drives the screwdriver bit 3 to work downward also stops working, avoiding damage to the PCBA board and the bracket due to excessive screw torque.

[0037] When the transmission column 33 pushes the slider 25 to move into the chute 24, the transmission column 33 will cross over the slider 25 and enter the drive groove 22. Even if the drive column 21 continues to move downward and rotate at this time, it will not cause excessive thrust to the transmission column 33, avoiding the situation where the drive inertia force of the drive mechanism may push the screwdriver bit 3 to drive the screw to rotate again when the drive mechanism stops working, and further improving the safety and reliability of the device.

[0038] A sliding plate 4 is provided on the back of the drive motor 1. A slide rail 5 for its sliding is provided on the back of the sliding plate 4. An installation base plate 6 is provided on the back of the slide rail 5. A locking cylinder 7 is provided on the installation base plate 6. The output end of the locking cylinder 7 is connected to the sliding plate 4 to push the sliding plate 4 to slide along the slide rail 5. When the locking cylinder 7 works, the sliding plate 4 slides along the slide rail 5, further causing the drive motor 1, the drive rod 2, the torque mechanism, and the screwdriver bit 3 to slide along the slide rail 5. At this time, when the screwdriver bit 3 drives the screw to rotate, it can push the screw to move to realize the screwing in of the screw.

[0039] Further, the locking cylinder 7 is electrically connected to the shutdown button 27 to facilitate the simultaneous triggering of the locking cylinder 7 and the drive motor 1.

[0040] A U-shaped positioning plate 8 is provided at the bottom of the sliding plate 4. A feed pipe 9 for feeding screws is provided on one side of the U-shaped positioning plate 8. A pair of clamping jaws 10 are provided inside the U-shaped positioning plate 8. A space for the screwdriver bit 3 to pass through is left between the pair of clamping jaws 10. The pair of clamping jaws 10 are arranged below the bottom discharge port of the feed pipe 9 to clamp the screws falling through the feed pipe 9. During work, the screws are fed orderly through the feed pipe 9. The prior art will not be elaborated here. The screws fall one by one between the clamping jaws 10 inside the U-shaped positioning plate 8. At this time, the clamping jaws 10 form a clamping force on the screws and make the screws be clamped at a predetermined position. At this time, the bottom of the screwdriver bit 3 can be aligned with the head of the screw to facilitate the subsequent screwing-in work.

[0041] The opposite sides of the clamping jaws 10 on both sides are provided with mutually matching clamping grooves 101 for clamping the screws falling through the feed pipe 9 so that the screws are accurately clamped to the preset position. An arc groove 102 is horizontally provided in the clamping groove 101. A connecting spring 103, a trigger block 104 and a trigger button 105 are provided inside the arc groove 102. The connecting spring 103 connects the arc groove 102 and the trigger block 104. The outer wall of the trigger block 104 exceeds the arc groove 102 to form a clamping force on the screw between the two clamping jaws 10. The trigger block 104 is slidably connected in the arc groove 102. When the screw is turned and rotated by the screwdriver head 3, the trigger block 104 triggers the trigger button 105. The trigger button 105 is electrically connected to the drive motor 1 and the locking cylinder 7 to control the drive motor 1 and the locking cylinder 7 to stop. The screwdriver head 3 is aligned with the head of the screw. After that, it will first drive the screw to rotate. During this process, the locking cylinder 7 does not work, and the outer wall of the screw abuts against the trigger blocks 104 on both sides. At this time, the trigger blocks 104 on both sides will be driven to move along the arc groove 102, further causing the trigger button 105 to be triggered. At this time, the clamping claws 10 on both sides are controlled to separate and release the clamping of the screw, and then the locking cylinder 7 starts to drive the screw downward for screwing in. When the screw head is damaged, the screwdriver head 3 cannot drive the screw to rotate, that is, the trigger block 104 cannot trigger the trigger button 105 at this time. When the trigger button 105 does not receive the trigger signal for a long time, an electrical signal is sent at this time to control the drive motor 1 and the locking cylinder 7 to stop, so as to avoid damage to the screw head. When the screwdriver head 3 cannot drive the screw to rotate, the screw is pressed into the screw hole, causing damage to the PCBA board and the bracket, thereby achieving the effect of intelligent anti-foolproofing.

[0042] A clamping cylinder 11 is provided on the side of the U-shaped positioning plate 8 facing away from the feed pipe 9, and a push block 12 is provided at the output end of the clamping cylinder 11. A pair of inclined grooves 13 are opened inside the push block 12, and a push column 14 is slidably connected in each inclined groove 13. The clamping jaw 10 is rotatably connected in the U-shaped positioning plate 8, and one side of it is connected to the push column 14. When the push block 12 moves, the two clamping jaws 10 are separated or clamped, and the clamping cylinder 11 is started. At this time, the push block 12 moves, and the two clamping jaws 10 can clamp or release the screw through the cooperation of the inclined groove 13 and the push column 14. Furthermore, the clamping cylinder 11 is electrically connected to the trigger button 105, so that when the trigger button 105 is triggered, the clamping cylinder 11 is started and the clamping force on the screw is released in time.

[0043] A vertical slot for accommodating a torque mechanism is provided in the sliding plate 4, and the sliding disk 31 is rotatably connected in the vertical slot to limit the screwdriver head 3. The screwdriver head 3 can be effectively limited to ensure that it does not shake or deviate from a predetermined trajectory during operation, thereby improving the stability and accuracy of the operation.

[0044] There is a space for the driving column 21 to move downward between the bottom of the driving column 21 and the bottom of the sliding disk 31, which can provide the necessary stroke space for the driving column 21.

[0045] The bottom of the slider 25 at the end facing the transmission column 33 is an arc-shaped inclined surface that fits the outer wall of the transmission column 33. While ensuring that the slider 25 has a certain extrusion force on the top of the transmission column 33, the transmission column 33 can relatively push the slider 25 to move. The top of the slider 25 is an inclined surface, so that the transmission column 33 can push it into the chute 24 from the upper side of the transmission column 33, ensuring that when the screwdriver bit 3 is pulled downward, the transmission column 33 can push the slider 25 to facilitate the rapid reset of the transmission column 33.

[0046] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising a..." does not exclude the existence of additional identical elements in the process, method, article or device comprising the element.

[0047] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A PCBA board bracket screw locking machine, comprising a drive motor (1), characterized in that: The output end of the drive motor (1) is connected to a drive rod (2), and the drive rod (2) is connected to a screwdriver head (3) via a torque mechanism so as to automatically disconnect thrust transmission when the screwdriver head (3) encounters excessive resistance; The torque mechanism comprises a driving column (21) connected to the driving rod (2), the outer surface of the driving column (21) is symmetrically provided with inclined driving grooves (22) along its circumference, the bottom of each driving groove (22) is provided with a receiving groove (23), one side of the receiving groove (23) is provided with a slide groove (24), the interior of the slide groove (24) is slidably connected with a slider (25) supported by a supporting spring (26), the interior of the slide groove (24) is provided with a stop button (27) corresponding to the sliding direction of the slider (25), the stop button (27) is electrically connected to the driving motor (1), and is used to stop the operation of the driving motor (1) when triggered; The torque mechanism further comprises a sliding plate (31) connected to the screwdriver head (3), a pair of vertical plates (32) being provided on the top of the sliding plate (31), a transmission column (33) corresponding to the receiving groove (23) being provided on one side of each vertical plate (32), the transmission column (33) being inserted into the receiving groove (23) and being located at the bottom of the end of the slider (25), so that when the driving column (21) applies an excessive thrust to the transmission column (33), the slider (25) is forced to trigger the stop button (27); The back of the driving motor (1) is provided with a sliding plate (4), the back of the sliding plate (4) is provided with a sliding rail (5) for sliding, the back of the sliding rail (5) is provided with a mounting base (6), the mounting base (6) is provided with a locking cylinder (7), the output end of the locking cylinder (7) is connected to the sliding plate (4) to push the sliding plate (4) to slide along the sliding rail (5); A U-shaped positioning plate (8) is provided at the bottom of the sliding plate (4), a feeding pipe (9) is provided on one side of the U-shaped positioning plate (8), a pair of clamping claws (10) are provided inside the U-shaped positioning plate (8), a space for the screwdriver head (3) to pass through is reserved between the pair of clamping claws (10), and the pair of clamping claws (10) are arranged below the discharge port at the bottom of the feeding pipe (9) to clamp the screws falling through the feeding pipe (9); The opposite sides of the clamping jaws (10) on both sides are provided with mutually matching clamping grooves (101) for clamping the screws falling through the feed pipe (9), and the clamping groove (101) is provided with an arc groove (102) in the transverse direction, and the arc groove (102) is provided with a connecting spring (103), a trigger block (104) and a trigger button (105) inside, and the connecting spring (103) connects the arc groove (102) and the trigger block (104), and the trigger block (105) is provided with a connecting spring (103) and a trigger block (104). The outer wall of the clamp (104) extends beyond the arc groove (102) to form a clamping force on the screw between the two clamping jaws (10); the trigger block (104) is slidably connected in the arc groove (102); when the screw is rotated by the screwdriver head (3), the trigger block (104) triggers the trigger button (105); the trigger button (105) is electrically connected to the drive motor (1) and the locking cylinder (7) to control the drive motor (1) and the locking cylinder (7) to stop.

2. A PCBA board bracket locking screw machine as claimed in claim 1, characterized in that: A clamping cylinder (11) is provided on the side of the U-shaped positioning plate (8) facing away from the feed pipe (9), and a push block (12) is provided at the output end of the clamping cylinder (11). A pair of inclined grooves (13) are provided inside the push block (12), and a push column (14) is slidably connected in each of the inclined grooves (13). The clamping jaw (10) is rotatably connected in the U-shaped positioning plate (8), and one side of the clamping jaw is connected to the push column (14). When the push block (12) moves, the two clamping jaws (10) are separated or clamped.

3. A PCBA board bracket locking screw machine as claimed in claim 1, characterized in that: The sliding plate (4) is provided with a vertical slot for accommodating a torque mechanism, and the sliding disc (31) is rotatably connected in the vertical slot to limit the position of the screwdriver head (3).

4. A PCBA board bracket locking screw machine as claimed in claim 1, characterized in that: The bottom of the driving column (21) and the bottom of the sliding plate (31) have a space for the driving column (21) to move downward.

5. A PCBA board bracket locking screw machine as claimed in claim 1, characterized in that: The bottom of the slider (25) facing the transmission column (33) is an arc-shaped inclined surface that fits the outer wall of the transmission column (33), and the top is an inclined surface, so that the transmission column (33) can be pushed from the upper side of the transmission column (33) to move into the slide groove (24).

Images