Workpiece pressing screw locking device
By designing a workpiece compression screw locking device including a compression assembly and a lock assembly, the problem that existing tools cannot simultaneously screw multiple screws simultaneously is solved, improving work efficiency, preventing workpiece movement and tool damage, and ensuring proper longitudinal pressure for each screw.
Patent Information
- Application Number
- CN202510289180.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-12
- Publication Date
- 2025-04-25
AI Technical Summary
The existing screwing tools cannot screw multiple screws simultaneously at the same time, which is inefficient in working efficiency, and the workpiece is easy to move during screw locking, which causes inconvenience to operation. In addition, the rigid structure of the screw tool is easily subjected to the reaction force of the screw, which affects the service life, and synchronousness in the longitudinal direction is difficult to achieve, making it easy to cause screws not to tighten or damage to the screw tool.
A workpiece compression screw locking device is designed, including a compression assembly and a locking assembly. The compression assembly drives the entire downward movement through the lifting cylinder, and the elastic pressing head fixes the edge of the workpiece to prevent movement. The locking assembly is driven by gears and motors to achieve synchronous screwing of multiple screws. The driving rod and the driven rod are connected by magnetic couplings to achieve flexible connections to avoid impact of the screw reaction force on the tool. The cushioning structure provides cushioning function in the longitudinal direction, ensuring that each screw is pressured in the longitudinal direction appropriately.
The simultaneous screwing of multiple screws is achieved, which greatly improves work efficiency, prevents workpiece movement, reduces impact damage of the tool, extends service life, and ensures that each screw has appropriate pressure in the longitudinal direction, avoids excessive screwing or intact.
Smart Images
Figure CN119870955A_ABST
Abstract
Description
Technical field:
[0001] The invention relates to the technical field of screw locking, and in particular to a workpiece pressing screw locking device. Background technology:
[0002] At present, in the process of screwing and locking screws, the existing screwing tools generally screw a single screw and cannot screw multiple screws synchronously at the same time, which has low work efficiency and the workpiece is easy to move during the screw locking process, which brings inconvenience to the operation; in addition, the existing screwing tools are rigid structures in both the axial direction and the longitudinal direction. The disadvantage of the rigid structure in the axial direction is that when the screw reaches the locking point, the screwing tool is easily affected by the reaction force of the screw if it continues to work, causing impact on the tool itself, and long-term use is easy to affect the service life of the screwing tool, especially if multiple screws are screwed at the same time. The locking point of each screw is slightly different. When some screws reach the locking point, other screws have exceeded the locking point, which may easily lead to over-tightening, causing varying degrees of damage to both the screws and the screwing tools. The disadvantage of the rigid structure in the longitudinal direction is that the screwing tool and the screw are in rigid contact in the longitudinal direction. If multiple screws are screwed at the same time, since the height of each screw is slightly different, it is difficult for the screwing tools to be completely consistent in synchronization, and it is easy for individual screws to have low pressure in the longitudinal direction and cannot be tightened. Excessive pressure can easily cause damage to the screwing tool. There is currently no good solution to the above problems.
[0003] In summary, the above-mentioned problems encountered in the process of screw tightening have become technical problems that need to be solved urgently in the industry. Summary of the invention:
[0004] In order to make up for the deficiencies of the prior art, the present invention provides a workpiece clamping screw locking device, which solves the problem that previous screwing tools cannot simultaneously screw multiple screws synchronously and have low work efficiency, and solves the problem that previous workpieces are prone to move, causing inconvenience in operation.
[0005] The technical solution adopted by the present invention to solve the above technical problems is:
[0006] The cam is connected with the upper and lower pressing plates by a plurality of supporting columns, and the four corners of the lifting plate are movably mounted on the guide shafts on the frame, and the two sides of the lifting plate are respectively connected with the lifting cylinder mounted on the top of the frame through the transmission shaft, and the bottom of the pressing plate is equipped with a plurality of elastic pressure heads corresponding to the edge positions of the workpieces; the locking assembly comprises a motor mounting plate, a gear mounting plate and a tightening mounting plate movably mounted on the supporting columns, the motor mounting plate and the gear mounting plate are connected as a whole by bolts, the gear mounting plate and the tightening mounting plate are connected by a plurality of columns, the middle part of the motor mounting plate is connected with the driving cylinder fixed on the lifting plate, and a plurality of tightening motors are installed on the motor mounting plate, the output shaft of the tightening motor is connected with the large gear arranged in the gear mounting plate, and the periphery of the large gear is meshed with a plurality of small gears, each of which is respectively connected with the screwing rod, and the bottom of the screwing rod corresponds to the screw position on the workpiece.
[0007] The bottom of the clamping plate is provided with a guide sleeve corresponding to the position of each screw rod.
[0008] The four corners of the tightening installation plate are movably installed on the guide shafts on the frame.
[0009] Lubricating grease is stored in the grooves around the large gear and the small gear.
[0010] The screwing rod includes an active rod and a driven rod, the top of the active rod is connected to the pinion, and the active rod and the driven rod are connected by a flexible structure. The active rod is installed in an upper bearing seat, and two upper bearings for supporting the active rod are provided in the upper bearing seat. The driven rod is installed in a lower bearing seat, and two lower bearings for supporting the driven rod are provided in the lower bearing seat. The lower part of the driven rod is connected to a screwing head through a buffer structure.
[0011] The flexible structure includes a magnetic coupling.
[0012] The active rod is provided with an upper boss and an upper bearing retaining ring for limiting the two upper bearings.
[0013] The driven rod is provided with a lower boss and a lower bearing retaining ring for limiting the two lower bearings.
[0014] The outer sides of the upper bearing seat and the lower bearing seat are respectively provided with mounting flanges. The upper bearing seat is fixed to the gear mounting plate through the mounting flanges, and the lower bearing seat is fixed to the tightening mounting plate through the mounting flanges.
[0015] The buffer structure includes a movable sleeve installed on the outside of the driven rod, a spring is sleeved on the driven rod between the top of the movable sleeve and the lower boss, long holes are provided in the side walls on both sides of the movable sleeve, and limit pins are installed at the positions of the driven rod corresponding to the long holes, and the two ends of the limit pin are respectively located in the long holes, and the bottom of the movable sleeve is connected to the screwing head.
[0016] The present invention adopts the above scheme and has the following advantages:
[0017] The lifting cylinder drives the clamping assembly and the locking assembly to move downward along the guide shaft as a whole. Several elastic pressure heads at the bottom of the clamping assembly can clamp and fix the edge of the workpiece to prevent the workpiece from moving when the screw is tightened, which is convenient for subsequent screw tightening work. The driving cylinder drives the locking assembly to move downward along the pillar as a whole. After it is in place, the tightening motor starts, and the output shaft of the tightening motor drives the large gear to rotate, and the large gear drives several small gears to rotate, and each small gear drives the screwing rod to rotate. The screws on the workpiece are locked by the screwing rod, and multiple screws can be tightened synchronously at the same time, which greatly improves work efficiency.
[0018] The active rod and the driven rod are connected by a magnetic coupling, which realizes a flexible connection between the active rod and the driven rod in the axial direction, avoids the impact of the reaction force of the screw on the tool itself, prolongs the service life of the screwing tool, and at the same time, there will be no over-tightening when multiple screws are tightened, which protects the screws and the screwing tool; the driven rod is connected to the screwing head by a buffer structure, which realizes the buffer function of the driven rod and the screwing head in the longitudinal direction, can reduce the impact force and play a protective role, and at the same time, when multiple screws are tightened, the pressure in the longitudinal direction of each screw can be ensured to ensure that it is tightened. Description of the drawings:
[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.
[0020] Figure 2 It is a three-dimensional enlarged structural schematic diagram of the clamping assembly and the locking assembly of the present invention.
[0021] Figure 3 It is a schematic structural diagram of the clamping assembly of the present invention.
[0022] Figure 4 It is a schematic structural diagram of the locking assembly of the present invention.
[0023] Figure 5 It is a schematic diagram of the structure of the internal drive of the locking assembly of the present invention.
[0024] Figure 6 It is a schematic diagram of the three-dimensional structure of the screw rod of the present invention.
[0025] Figure 7It is a schematic cross-sectional structural diagram of the screw rod of the present invention.
[0026] In the figure, 1, active rod, 2, driven rod, 3, upper bearing seat, 4, upper bearing, 5, lower bearing seat, 6, lower bearing, 7, screwing head, 8, magnetic coupling, 9, guide sleeve, 10, upper boss, 11, upper bearing retaining ring, 12, lower boss, 13, lower bearing retaining ring, 14, mounting flange, 15, movable sleeve, 16, spring, 17, long strip hole, 18, limit pin, 19, lifting plate, 20, clamping plate, 21, pillar, 22, elastic pressure head, 23, motor mounting plate, 24, gear mounting plate, 25, tightening mounting plate, 26, driving cylinder, 27, tightening motor, 28, large gear, 29, small gear, 30, screwing rod, 31, column, 32, guide shaft, 33, lifting cylinder. Specific implementation method:
[0027] In order to clearly illustrate the technical features of the present solution, the present invention is described in detail below through specific implementation methods and in conjunction with the accompanying drawings.
[0028] like Figure 1-7 As shown, a workpiece clamping screw locking device includes a clamping assembly, in which a locking assembly is movably installed, the clamping assembly includes an upper lifting plate 19 and a lower clamping plate 20, the lifting plate 19 and the clamping plate 20 are connected by a plurality of pillars 21, the four corners of the lifting plate 19 are movably installed on the guide shaft 32 on the frame, the two sides of the lifting plate 19 are respectively connected to the lifting cylinder 33 installed on the top of the frame through the transmission shaft, and the bottom of the clamping plate 20 is installed with a plurality of elastic pressure heads 22 corresponding to the edge position of the workpiece; the locking assembly includes a motor mounting plate 23 movably installed on the pillar 21, a gear mounting plate 23 and a gear mounting plate 24; The plate 24 and the tightening mounting plate 25, the motor mounting plate 23 and the gear mounting plate 24 are connected together by bolts, the gear mounting plate 24 and the tightening mounting plate 25 are connected by a number of columns 31, the middle part of the motor mounting plate 23 is connected to the driving cylinder 26 fixed on the lifting plate 19, and a number of tightening motors 27 are installed on the motor mounting plate 23. The output shaft of the tightening motor 27 is connected to the large gear 28 arranged in the gear mounting plate 24, and the periphery of the large gear 28 is meshed with a number of small gears 29, each small gear 29 is respectively connected to a screwing rod 30, and the bottom of the screwing rod 30 corresponds to the screw position on the workpiece.
[0029] A guide sleeve 9 is provided at the bottom of the clamping plate 20 corresponding to the position of each screwing rod 30. On the one hand, the guide sleeve 9 can guide the screwing rod 30. On the other hand, when the clamping plate 20 moves downward, the screw cover on the workpiece can be used to straighten the screw, so that the screwing rod 30 can better screw the screw.
[0030] The four corners of the tightening mounting plate 25 are movably mounted on the guide shaft 32 on the frame to improve the stability of operation.
[0031] Grease is stored in the grooves around the large gear 28 and the small gear 29 for lubricating the large gear 28 and the small gear 29.
[0032] The screwing rod 30 includes an active rod 1 and a driven rod 2. The top of the active rod 1 is connected to the pinion 29. The active rod 1 and the driven rod 2 are connected by a flexible structure. The active rod 1 is installed in an upper bearing seat 3. The upper bearing seat 3 is provided with two upper bearings 4 for supporting the active rod 1. The driven rod 2 is installed in a lower bearing seat 5. The lower bearing seat 5 is provided with two lower bearings 6 for supporting the driven rod 2. The lower part of the driven rod 2 is connected to a screwing head 7 through a buffer structure.
[0033] The flexible structure includes a magnetic coupling 8. The magnetic coupling 8 is a non-contact coupling, which consists of two inner and outer magnets, separated by an isolation cover in the middle, the inner magnet is connected to the driven rod, and the outer magnet is connected to the active rod. The working principle of the magnetic coupling 8 is to use the interaction of magnetic fields to transmit motion and torque without direct contact.
[0034] The active rod 1 is provided with an upper boss 10 and an upper bearing retaining ring 11 for limiting the two upper bearings 4 .
[0035] The driven rod 2 is provided with a lower boss 12 and a lower bearing retaining ring 13 for limiting the two lower bearings 6 .
[0036] The outer sides of the upper bearing seat 3 and the lower bearing seat 5 are respectively provided with mounting flanges 14 , and the upper bearing seat 3 is fixed to the gear mounting plate 24 through the mounting flanges 14 , and the lower bearing seat 5 is fixed to the tightening mounting plate 25 through the mounting flanges 14 .
[0037] The buffer structure includes a movable sleeve 15 installed on the outside of the driven rod 2, a spring 16 is sleeved on the driven rod 2 between the top of the movable sleeve 15 and the lower boss 12, and long holes 17 are provided in the side walls of the movable sleeve 15 on both sides. A limit pin 18 is installed at the position of the driven rod 2 corresponding to the long hole 17, and the two ends of the limit pin 18 are respectively located in the long hole 17. The bottom of the movable sleeve 15 is connected to the screwing head 7. After the movable sleeve 15 compresses the spring 16, a certain displacement can occur between it and the driven rod 2 in the longitudinal direction. The spring 16 plays a buffering role. The limit pin 18 cooperates with the long hole 17 to limit and guide the up and down movement of the movable sleeve 15. At the same time, the driven rod 2 also drives the movable sleeve 15 to rotate through the limit pin 18, and the movable sleeve 15 then drives the screwing head 7 to rotate to screw the screw.
[0038] Working principle:
[0039] During operation, the lifting cylinder 33 drives the clamping assembly and the locking assembly to move downward along the guide shaft 32 as a whole. The several elastic pressure heads 22 at the bottom of the clamping assembly can clamp and fix the edge of the workpiece to prevent the workpiece from moving when the screw is tightened, thereby facilitating the subsequent screw tightening work. At the same time, the guide sleeve 9 can cover the screw on the workpiece inside to straighten the screw, so that the screwing rod 30 can better tighten the screw. Then the driving cylinder 26 is started to drive the locking assembly to move downward along the support 21 and the guide shaft 32 as a whole. After it is in place, the tightening motor 27 is started. The output shaft of the tightening motor 27 drives the large gear 28 to rotate, and the large gear 28 drives several small gears 29 to rotate. Each small gear 29 drives the active rod 1 to rotate. The active rod 1 drives the driven rod 2 to rotate through the magnetic coupling 8. The driven rod 2 drives the movable sleeve 15 to rotate through the limit pin 18. The movable sleeve 15 drives the screwing head 7 to rotate, thereby tightening the screw. During the screwing process, the magnetic coupling 8 realizes a flexible connection between the active rod 1 and the driven rod 2 in the axial direction. After exceeding the upper force limit, idling may occur between the active rod 1 and the driven rod 2, thereby avoiding the impact of the reaction force of the screw on the tool itself. At the same time, there will be no over-screwing when multiple screws are screwed, which protects the screws and the screwing tool. The movable sleeve 15 and the spring 16 realize the buffering function of the active rod 1 and the driven rod 2 in the longitudinal direction. After the movable sleeve 15 compresses the spring 16, a certain displacement may occur between the movable sleeve 15 and the driven rod 2 in the longitudinal direction, and the spring 16 plays a buffering role. The limit pin 18 cooperates with the long hole 17 to limit and guide the up and down movement of the movable sleeve 15. When multiple screws are screwed at the same time, the pressure in the longitudinal direction of each screw can be ensured to ensure that it is tightened.
[0040] The above specific implementation manner cannot be used as a limitation on the protection scope of the present invention. For those skilled in the art, any substitution, improvement or change made to the implementation manner of the present invention falls within the protection scope of the present invention.
[0041] The matters not described in detail in the present invention are all known technologies to those skilled in the art.
Claims
1. A workpiece clamping screw locking device, characterized in that: The cam is connected to the upper and lower pressing plates by a plurality of supporting columns, and the four corners of the lifting plate are movably mounted on the guide shafts on the frame, and the two sides of the lifting plate are respectively connected to the lifting cylinder mounted on the top of the frame through the transmission shaft, and the bottom of the pressing plate is provided with a plurality of elastic pressure heads corresponding to the edge positions of the workpieces; the locking assembly comprises a motor mounting plate, a gear mounting plate and a tightening mounting plate movably mounted on the supporting columns, the motor mounting plate and the gear mounting plate are connected to each other through bolts, the gear mounting plate and the tightening mounting plate are connected through a plurality of columns, the middle part of the motor mounting plate is connected to the driving cylinder fixed on the lifting plate, a plurality of tightening motors are installed on the motor mounting plate, the output shaft of the tightening motor is connected to the large gear arranged in the gear mounting plate, the periphery of the large gear is meshed with a plurality of small gears, each small gear is respectively connected to the screwing rod, and the bottom of the screwing rod corresponds to the screw position on the workpiece.
2. A workpiece clamping screw locking device according to claim 1, characterized in that: The bottom of the clamping plate is provided with a guide sleeve corresponding to the position of each screw rod.
3. A workpiece clamping screw locking device according to claim 1, characterized in that: The four corners of the tightening installation plate are movably installed on the guide shafts on the frame.
4. A workpiece clamping screw locking device according to claim 1, characterized in that: Lubricating grease is stored in the grooves around the large gear and the small gear.
5. A workpiece clamping screw locking device according to claim 1, characterized in that: The screwing rod includes an active rod and a driven rod, the top of the active rod is connected to the pinion, and the active rod and the driven rod are connected by a flexible structure. The active rod is installed in an upper bearing seat, and two upper bearings for supporting the active rod are provided in the upper bearing seat. The driven rod is installed in a lower bearing seat, and two lower bearings for supporting the driven rod are provided in the lower bearing seat. The lower part of the driven rod is connected to a screwing head through a buffer structure.
6. A workpiece clamping screw locking device according to claim 5, characterized in that: The flexible structure includes a magnetic coupling.
7. A workpiece clamping screw locking device according to claim 5, characterized in that: The active rod is provided with an upper boss and an upper bearing retaining ring for limiting the two upper bearings.
8. A workpiece clamping screw locking device according to claim 5, characterized in that: The driven rod is provided with a lower boss and a lower bearing retaining ring for limiting the two lower bearings.
9. A workpiece clamping screw locking device according to claim 5, characterized in that: The outer sides of the upper bearing seat and the lower bearing seat are respectively provided with mounting flanges. The upper bearing seat is fixed to the gear mounting plate through the mounting flanges, and the lower bearing seat is fixed to the tightening mounting plate through the mounting flanges.
10. A workpiece clamping screw locking device according to claim 8, characterized in that: The buffer structure includes a movable sleeve installed on the outside of the driven rod, a spring is sleeved on the driven rod between the top of the movable sleeve and the lower boss, long holes are provided in the side walls on both sides of the movable sleeve, and limit pins are installed at the positions of the driven rod corresponding to the long holes, and the two ends of the limit pin are respectively located in the long holes, and the bottom of the movable sleeve is connected to the screwing head.