PCBA (printed circuit board assembly) board bracket screw locking machine

Abstract

The invention relates to the technical field of PCBA production equipment, and provides a PCBA board support locking screw machine which comprises a driving motor, the output end of the driving motor is connected with a driving rod, and the driving rod is connected with a screwdriver bit through a torsion mechanism, so that when the screwdriver bit suffers from overlarge resistance, thrust transmission is automatically cut off, and the screwdriver bit is driven to rotate. The screw driver overcomes the defects in the prior art, is reasonable in design and compact in structure, can automatically cut off thrust transmission when a screw is tightened or blocked through the design of the torsion mechanism, protects equipment and workpieces from being damaged, and meanwhile, through the cooperation of the transmission column, the sliding block and the driving groove, the situation that the screwdriver bit is pushed again by driving inertia force when the driving mechanism is shut down is avoided, and the service life of the screwdriver bit is prolonged. And the safety is further improved. When the head of a screw is damaged and a screwdriver bit cannot drive the screw to rotate, the driving motor and the locking air cylinder can be automatically stopped, the PCBA board and the support are effectively prevented from being damaged due to the fact that the screw is pressed in, and the intelligent fool-proof effect is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of PCBA production equipment, and in particular to a PCBA board bracket locking screw machine. Background Art

[0002] In the electronics manufacturing industry, the screw locking of PCBA (Printed Circuit Board Assembly) board brackets is a crucial link, which is directly related to the assembly quality, stability and durability of electronic products. Traditional screw locking methods mostly use manual operations, which is not only inefficient, but also prone to problems such as inconsistent locking force, screw damage or damage to PCBA boards and brackets due to human factors. With the continuous development of automation technology, automatic screw locking machines have gradually replaced traditional manual operations.

[0003] However, the existing automatic screw locking machines still have some shortcomings. For example, some automatic screw locking machines lack an effective torque control mechanism during the locking process. When the screws are tightened or encounter excessive resistance, the drive cannot be stopped in time, which may cause damage to the PCBA board and bracket. For this reason, we propose a PCBA board bracket locking screw machine. Summary of the invention

[0004] 1. Technical issues to be solved

[0005] In view of the deficiencies of the prior art, the present invention provides a PCBA board bracket locking screw machine, which overcomes the deficiencies of the prior art, has a reasonable design and a compact structure, and solves the problem that the existing screws cannot be driven in time when tightening or encountering excessive resistance.

[0006] (II) Technical solution

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions: a PCBA board bracket locking screw machine, comprising 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 head through a torque mechanism, so that the thrust transmission is automatically disconnected when the screwdriver head encounters excessive resistance;

[0008] The torque mechanism comprises 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, the bottom of each driving groove is provided with a receiving groove, one side of the receiving groove is provided with a slide groove, the interior of the slide groove is slidably connected with a slider supported by a supporting spring, and a stop button is provided inside the slide groove corresponding to the sliding direction of the slider, and the stop 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 locking screw machine. It 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 workpiece from damage. At the same time, the cooperation between the transmission column, the slider and the drive slot avoids the driving inertia force pushing the screwdriver head again when the driving mechanism stops, further improving safety.

[0020] 2. When the screw head is damaged and the screwdriver head cannot drive the screw to rotate, it can automatically stop driving the motor and locking cylinder, effectively preventing the PCBA board and the bracket from being damaged due to the pressing of the screw, and achieving the effect of intelligent anti-fool. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a main perspective schematic diagram of the overall structure of the present invention;

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

[0023] Figure 3 It is a schematic cross-sectional view of the driving rod structure of the present invention;

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

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

[0026] Figure 6 It is a three-dimensional schematic diagram of the receiving tank structure of the present invention;

[0027] Figure 7 It is a schematic cross-sectional perspective view of the driving column structure of the present invention;

[0028] Figure 8 This is a front perspective schematic diagram of the clamping jaw structure of the present invention;

[0029] Fig. 9 It is a top perspective schematic diagram of the clamping jaw structure of the present invention;

[0030] Fig.10 It is a 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. receiving groove; 24. sliding groove; 25. sliding block; 26. supporting spring; 27. stop button; 3. screwdriver head; 31. sliding plate; 32. vertical plate; 33. transmission column; 4. sliding plate; 5. sliding rail; 6. mounting base plate; 7. locking cylinder; 8. U-shaped positioning plate; 9. feeding pipe; 10. clamping 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 DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are 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.

[0033] See attached Figure 1-10 A PCBA board bracket locking screw 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, and the driving rod 2 is connected to a screwdriver head 3 through a torque mechanism, so that the thrust transmission is automatically disconnected when the screwdriver head 3 encounters excessive resistance. When the driving motor 1 is started, the driving rod 2 rotates accordingly, and drives the screwdriver head 3 to rotate through the torque mechanism, thereby performing a screw locking function;

[0034] The torque mechanism includes a driving column 21 connected to the driving rod 2, and the outer surface of the driving column 21 is symmetrically provided with inclined driving grooves 22 along its circumference, and each driving groove 22 is provided with a receiving groove 23 at the bottom, and a slide groove 24 is provided on one side of the receiving groove 23, and a slider 25 supported by a supporting spring 26 is slidably connected inside the slide groove 24, and a stop button 27 is provided inside the slide groove 24 corresponding to the sliding direction of the slider 25, and 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;

[0035] The torque mechanism also includes a sliding disk 31 connected to the screwdriver head 3. A pair of vertical plates 32 are provided on the top of the sliding disk 31. A transmission column 33 corresponding to the receiving groove 23 is provided on one side of each vertical plate 32. The transmission column 33 is inserted into the receiving groove 23 and is located at the bottom of the end of the slider 25. When the driving column 21 applies excessive thrust to the transmission column 33, the slider 25 is forced to trigger the stop button 27.

[0036] When the screw is tightened with the screwdriver head 3, the driving motor 1 is started. At this time, the driving rod 2 drives the screwdriver head 3 to work through the torque mechanism. When the screw is tightened, the screwdriver head 3 as a whole will move downward during the rotation so that the screw can be screwed into the bracket. Therefore, the driving rod 2 will move downward during the rotation, that is, the driving column 21 will also move downward during the rotation. When the screw is tightened or subjected to other forms of excessive resistance, the screwdriver head 3 will encounter increased resistance and stop rotating. At this time, the transmission column 33 located in the accommodating groove 23 will also stop rotating. Since the driving column 21 moves downward relative to the transmission column 33 during rotation, the transmission column 33 will push the slider 25 to move toward the inside of the slide groove 24, thereby triggering the stop button 27. At this time, the driving motor 1 stops working, and the driving mechanism that drives the screwdriver head 3 to work downward also stops working, thereby preventing the PCBA board and the bracket from being damaged by excessive screw torque.

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

[0038] A sliding plate 4 is provided on the back of the driving motor 1, and a slide rail 5 for sliding is provided on the back of the sliding plate 4. A mounting base plate 6 is provided on the back of the slide rail 5. A locking cylinder 7 is provided on the mounting 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, and further the driving motor 1, the driving rod 2, the torque mechanism and the screwdriver head 3 slide along the slide rail 5. At this time, the screwdriver head 3 can push the screw to move during the process of driving the screw to rotate, so as to screw the screw in.

[0039] Furthermore, the locking cylinder 7 is electrically connected to the stop button 27 so that the locking cylinder 7 and the driving motor 1 are triggered simultaneously.

[0040] A U-shaped positioning plate 8 is provided at the bottom of the sliding plate 4, and a feeding pipe 9 is provided on one side of the U-shaped positioning plate 8 for inserting screws. A pair of clamping jaws 10 is provided in the U-shaped positioning plate 8, and a space for the screwdriver head 3 to pass through is reserved between the pair of clamping jaws 10. The pair of clamping jaws 10 are arranged below the discharge port at the bottom of the feed pipe 9 to clamp the screws falling through the feed pipe 9. During operation, the screws are inserted in an orderly manner through the feed pipe 9, and the prior art is not described in detail. The screws fall one by one between the clamping jaws 10 in the U-shaped positioning plate 8. At this time, the clamping jaws 10 form a clamping force on the screw and clamp the screw in a predetermined position. At this time, the bottom of the screwdriver head 3 can be aligned with the head of the screw to facilitate subsequent screwing 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] The bottom of the driving column 21 and the bottom of the sliding plate 31 have space for the driving column 21 to move downward, which can provide the driving column 21 with necessary travel space.

[0045] 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, ensuring that the slider 25 has a certain squeezing force on the top of the transmission column 33, while the transmission column 33 can push the slider 25 to move relatively. The top of the slider 25 is an inclined surface, so that the transmission column 33 can be pushed from the upper side of the transmission column 33 to move toward the slide groove 24, ensuring that when the screwdriver head 3 is pulled downward, the transmission column 33 can push the slider 25, so that the transmission column 33 can be quickly reset.

[0046] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0047] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A PCBA board bracket locking screw machine, comprising a drive motor (1), characterized in that: The output end of the driving motor (1) is connected to a driving rod (2), and the driving 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).

2. A PCBA board bracket locking screw machine as claimed in claim 1, characterized in that: 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 plate (6), the mounting base plate (6) is provided with a locking cylinder (7), and 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).

3. A PCBA board bracket locking screw machine as claimed in claim 2, characterized in that: 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 jaws (10) are provided inside the U-shaped positioning plate (8), a space for a screwdriver head (3) to pass through is reserved between the pair of clamping jaws (10), and the pair of clamping jaws (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).

4. A PCBA board bracket locking screw machine as claimed in claim 3, characterized in that: 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 feeding tube (9), and the clamping groove (101) is provided with an arc groove (102) in the horizontal 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 two clamping jaws (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.

5. A PCBA board bracket locking screw machine as claimed in claim 3, 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 inclined groove (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.

6. 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).

7. 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.

8. A PCBA board bracket locking screw machine as claimed in claim 1, characterized in that: The bottom of the slider (25) facing one end of 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 toward the slide groove (24).

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