One-way rotary fixture automatic return device and method

Abstract

The present invention discloses an automatic self-centering device and method for a one-way rotary clamp, the device comprising: a self-centering driving mechanism, comprising a stepped shaft, a first coupling, a one-way shaft, a second coupling and a driving motor connected in sequence, the driving motor being connected to a controller, a third pulley being installed on the stepped shaft, the self-centering driving mechanism being installed on a frame of a rotary device through bearings and seats installed at both ends of the stepped shaft, the third pulley being tensioned on a belt of the rotary device; a self-centering detection mechanism, comprising a plurality of magnets installed on a clamp coupling, and two Hall sensors arranged on a reduction box housing, the Hall sensors being connected to a controller of the driving motor, the Hall sensors being used to detect magnetic signals of the magnets and feeding them back to the controller of the driving motor. The present invention has the advantages of convenient self-centering control of the one-way rotary clamp and low cost.

Description

Technical Field

[0001] The invention relates to the field of mechanical processing, and in particular to an automatic self-centering device and method for a one-way rotary clamp. Background Art

[0002] The rotating parts that need to be corrected, such as the one-way rotary clamp installed on the clamp coupling of the rotating equipment, need to be adjusted to the correct position after the irregular object is clamped and fixed by the multi-jaw chuck, or the clamped object is manually adjusted to adapt to the position of the current one-way rotary clamp. Because the clamped object is irregular, the required one-way rotary clamp is also irregular. Therefore, the clamped object and the one-way rotary clamp cannot be matched in any direction. The angle of the one-way rotary clamp installed on the clamp coupling on the reducer of the rotating equipment needs to be rotated to make it in the correct state. Traditional one-way rotary clamps require manual observation and alignment, which takes a certain amount of time each time they are clamped, and there are angles that are difficult to observe, which greatly reduces efficiency and increases the labor intensity of workers. There are two common practices in this field to control the return of the intended rotary fixture: one is to install a camera and replace the power motor with a stepper motor, and use a visual solution to control the stepper motor at any angle to achieve positioning, but the cost of this solution is high, and the visual recognition effect is poor. The cost of high-power stepper motors is high, and the two have poor anti-pollution capabilities. The second is to calibrate the position after using a servo motor with a fixed ratio transmission, so that the position where the fixture stops each time is the return direction, but the cost is high, and the fixed ratio transmission is difficult to match, which limits the application scenarios. The servo motor and driver have poor anti-vibration and anti-pollution capabilities in some traditional equipment. Summary of the invention

[0003] The purpose of the present invention is to provide a one-way rotary clamp automatic return device and method to solve the problem of difficult return control and high cost of traditional rotary parts.

[0004] In order to solve the above technical problems, the present invention provides an automatic self-centering device for a one-way rotary clamp, wherein the rotary device comprises a frame, a rotary motor and a reduction box arranged on the frame, the output end of the reduction box is connected to a clamp coupling, the clamp coupling is used to install the one-way rotary clamp, the rotary motor and the reduction box are connected through a belt transmission structure, the belt transmission structure comprises a first pulley respectively arranged on the rotary motor and a second pulley arranged on the reduction box, and a belt wound around the first pulley and the second pulley; the automatic self-centering device for a one-way rotary clamp comprises:

[0005] The return drive mechanism comprises a stepped shaft and a one-way shaft connected by a first coupling, the one-way shaft is connected to a driving motor through a second coupling, the driving motor is connected to a controller, a third pulley is installed on the stepped shaft, bearings and bearing seats are installed at both ends of the stepped shaft, the return drive mechanism is installed on the frame of the rotating device through the bearing seat, and the third pulley is tensioned on the belt of the rotating device; the first pulley, the second pulley and the third pulley form a three-wheel belt transmission structure with the belt;

[0006] The return detection mechanism includes a plurality of magnets mounted on the clamp coupling, and two Hall sensors arranged on the reduction gear housing at an angle to the cross section of the clamp coupling. The Hall sensors are connected to the controller of the drive motor of the return drive mechanism. The Hall sensors are used to detect the magnetic signals of the magnets and feed them back to the controller of the drive motor.

[0007] Furthermore, in the automatic self-centering device for a one-way rotary clamp provided by the present invention, the two Hall sensors are mounted on the housing of the reduction box via a waist-shaped block.

[0008] Furthermore, in the one-way rotating clamp automatic return device provided by the present invention, the magnet is embedded and installed on the clamp coupling with the axis of the clamp coupling as the center.

[0009] Furthermore, in the automatic self-centering device for a one-way rotary clamp provided by the present invention, the controller is arranged in a control box, and the control box is arranged on the frame.

[0010] Furthermore, in the automatic return device for a one-way rotating clamp provided by the present invention, there are multiple belts, and the corresponding first pulley, second pulley and third pulley are all multiples matching the number of belts; or the corresponding first pulley, second pulley and third pulley are all provided with multiple belt grooves matching the number of multiple belts.

[0011] In order to solve the above technical problems, the present invention also provides a method for automatically returning a one-way rotary clamp, using the above-mentioned automatic returning device for the one-way rotary clamp, comprising:

[0012] The rotary motor stops and the drive motor starts. The drive motor rotates unidirectionally in the same direction through the second coupling, the one-way shaft, the first coupling and the stepped shaft. When the stepped shaft rotates, it drives the belt transmission through the third pulley. During the belt transmission, the second pulley on the reduction box and the first pulley of the rotary motor are driven to rotate, so that the clamp coupling on the reduction box rotates to change the angle of the one-way rotary clamp installed thereon. When the clamp coupling rotates, when a certain magnet on it passes through the first Hall sensor, the first Hall sensor will detect the magnetic signal of the magnet and feed it back to the controller of the drive motor. The controller controls the drive motor to decelerate so that the clamp coupling rotates at a reduced speed. When the magnet passes through the second Hall sensor when the clamp coupling rotates at a reduced speed, the second Hall sensor feeds back the magnetic signal of the magnet to the controller of the drive motor and controls the drive motor to stop, so that the clamp coupling is in the return position.

[0013] Furthermore, the present invention provides an automatic return method for a one-way rotating clamp. When the clamp coupling is displaced from its return position due to the inertial force of the drive motor, the drive motor is started to allow the clamp coupling to continue rotating. When the next magnet of the clamp coupling passes the first Hall sensor, the first Hall sensor will detect the magnetic signal of the magnet and feed it back to the controller of the drive motor. The controller controls the drive motor to decelerate so that the clamp coupling rotates at a slower speed. When the magnet passes the second Hall sensor during the decelerating rotation of the clamp coupling, the second Hall sensor feeds back the magnetic signal of the magnet to the controller of the drive motor and controls the drive motor to stop so that the clamp coupling is in the return position.

[0014] Furthermore, the one-way rotary clamp automatic return method provided by the present invention also includes a control method of the rotary device, and the control method of the rotary device includes:

[0015] Stop the driving motor and start the rotary motor. The rotary motor drives the belt transmission through the first pulley. During belt transmission, the stepped shaft and the first coupling connected to it are driven to rotate through the third pulley, and the one-way shaft does not rotate. During belt transmission, the reduction box is also rotated through the second pulley to put the clamp coupling and the one-way rotary clamp installed thereon into a rotating state.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The automatic return device and method for a one-way rotating clamp provided by the present invention add a return drive mechanism and a return detection mechanism to the traditional rotating equipment, which are attached to the original rotating equipment. Without starting the rotating motor of the rotating equipment, the return drive mechanism independently controls the rotation angle of the clamp coupling of the reduction box of the rotating equipment and the one-way rotating clamp installed thereon, and the start and stop of the return drive mechanism are controlled by the return detection mechanism, so that the clamp coupling and the one-way rotating clamp installed thereon are in a return state, thereby facilitating the return control of the one-way rotating clamp, solving the problem that the rotating motor of the rotating equipment is difficult to control the one-way rotating clamp on the clamp coupling for return, and making the one-way rotating clamp installed on the clamp coupling in a return state before clamping, thereby facilitating the installation and disassembly operations of the clamped object on the one-way rotating clamp.

[0018] The automatic return device and method for a one-way rotating clamp provided by the present invention detects the magnetic signal of a magnet on the clamp coupling by a Hall sensor of a return detection mechanism as the start and stop of a driving motor of a return drive mechanism to control the return of the clamp coupling on the reduction box and the one-way rotating clamp installed thereon, thereby improving the degree of automation of the return control of the clamp coupling and the one-way rotating clamp installed thereon, reducing the difficulty of the return control of the clamp coupling and the one-way rotating clamp installed thereon, and reducing the labor intensity of the work.

[0019] The automatic return device and method for a one-way rotary clamp provided by the present invention controls the return of a separate rotary clamp installed on a clamp coupling by adding a return drive mechanism and a return detection mechanism to a traditional rotary device, thereby avoiding improvements to a rotary motor and a reduction box and reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figures 1 to 4 It is a three-dimensional structural schematic diagram of the rotary device and the automatic self-centering device thereon;

[0021] Figure 5 It is a schematic diagram of the main structure of the rotary device and the automatic self-centering device thereon;

[0022] Figure 6 It is a right view structural diagram of the rotary device and the automatic self-centering device thereon;

[0023] Figures 7 and 8 It is a three-dimensional structural schematic diagram of the return drive mechanism;

[0024] As shown in the figure:

[0025] 100, rotating equipment, 110, frame, 120, rotating motor, 121, first pulley, 130, reduction box, 131, second pulley, 140, fixture coupling, 150, belt;

[0026] 200. Automatic return device of one-way rotary clamp, 210. Return drive mechanism, 211. First coupling, 212. Second coupling, 213. Step shaft, 214. One-way shaft, 215. Drive motor, 216. Third pulley, 217. Control box, 218. Bearing seat, 219. Bearing, 220. Return detection mechanism, 221. Magnet, 222. Hall sensor, 223. Waist-shaped block. DETAILED DESCRIPTION

[0027] The present invention is described in detail below in conjunction with the accompanying drawings: The advantages and features of the present invention will become more apparent from the following description. It should be noted that the accompanying drawings are in very simplified form and in non-precise proportions, and are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention. Example

[0028] Please refer to Figures 1 to 8 The first embodiment of the present invention provides an automatic return device 200 for a one-way rotating fixture, including a return drive mechanism 210 and a return detection mechanism 220, which is used to be installed on the one-way rotating fixture of the fixture coupling of the rotating device.

[0029] The rotary device 100 includes a frame 110, a rotary motor 120 and a reduction box 130 arranged on the frame 110, the output end of the reduction box 130 is connected to a fixture coupling 140, the fixture coupling 140 is used to install a one-way rotary fixture (not shown), the rotary motor 120 and the reduction box 130 are connected through a belt transmission mechanism, and the belt transmission mechanism includes a first pulley 121 and a second pulley 131 respectively arranged on the rotary motor 120 and the reduction box 130, and a belt 150 wound around the first pulley 121 and the second pulley 131. The one-way rotary fixture can be any fixture known in the art that matches the clamped object.

[0030] The return drive mechanism 210 includes a stepped shaft 213 and a one-way shaft 214 connected by a first coupling 211. The one-way shaft 214 is connected to a driving motor 215 through a second coupling 212. The driving motor 215 is connected to a controller. In order to protect the controller, the controller can be set in a control box 217, and the control box 217 is set on the frame 110. A third pulley 216 is installed on the stepped shaft 213. Bearings 219 and bearing seats 218 are installed at both ends of the stepped shaft 213. The return drive mechanism 210 is installed on the frame 110 of the rotating device 100 through the bearing seats 218. The third pulley 216 is tensioned on the belt of the rotating device 100. The first pulley 121, the second pulley 131 and the third pulley 216 form a three-wheel belt transmission mechanism with the belt 150. The one-way shaft 214 is a well-known technology in the art and has only a one-way rotation function.

[0031] The return detection mechanism 220 includes a plurality of magnets 221 mounted on the clamp coupling 140, and two Hall sensors 222 arranged on the housing of the reduction box 130 at an angle aligned with the cross section of the clamp coupling 140. The Hall sensors 222 are connected to the controller of the drive motor 215 of the return drive mechanism 210. The Hall sensors 222 are used to detect the magnetic signal of the magnet 221 and feed it back to the controller of the drive motor 215. For ease of installation, the magnet 221 may be cylindrical.

[0032] Please refer to Figure 1 In order to install the two Hall sensors 222 at an angle, the one-way rotary clamp automatic return device 200 provided in the first embodiment of the present invention has the two Hall sensors 222 installed on the housing of the reduction box 130 through a waist-shaped block 223.

[0033] Please refer to Figure 2 In order to adapt to the return control of different one-way rotating clamps, the one-way rotating clamp automatic return device 200 provided in the first embodiment of the present invention has the magnet 221 embedded and installed on the clamp coupling 140 with the axis of the clamp coupling 140 as the center. The number of the magnets 221 can be three, four, six, etc. The number of the magnets 221 can also be adjusted according to the different one-way rotating clamps installed on the clamp coupling 140.

[0034] Please refer to Figure 1 , Figure 2 and Figure 6In order to improve the transmission control force of the return drive mechanism 210 on the reduction box 130 so that the fixture coupling 140 rotates smoothly, the one-way rotary fixture automatic return device 200 provided in the first embodiment of the present invention has multiple belts 150, and the corresponding first pulley 121, second pulley 131 and third pulley 216 are all multiple to match the number of belts 150. Alternatively, when there are multiple belts 150, the corresponding first pulley 121, second pulley 131 and third pulley 216 are all provided with multiple belt grooves to match the number of multiple belts 150. Example

[0035] Embodiment 2 of the present invention provides an automatic return method for a rotary device 100, using the above-mentioned one-way rotary fixture automatic return device 200, comprising:

[0036] The rotary motor 120 stops, and the drive motor 215 starts. The drive motor 215 rotates unidirectionally in the same direction through the second coupling 212, the one-way shaft 214, the first coupling 211, and the stepped shaft 213. When the stepped shaft 213 rotates, the belt 150 is driven through the third pulley 216. When the belt 150 is driven, the second pulley 131 on the reduction box 130 and the first pulley 121 of the rotary motor 120 are driven to rotate, so that the clamp coupling 140 on the reduction box 130 rotates to change the angle of the one-way rotary clamp installed thereon. When the clamp coupling 140 rotates When a certain magnet 221 on it passes through the first Hall sensor 222, the first Hall sensor 222 will detect the magnetic signal of the magnet 221 and feed it back to the controller of the drive motor 215, and the controller will control the drive motor 215 to decelerate so that the clamp coupling 140 will rotate at a reduced speed. When the clamp coupling 140 rotates at a reduced speed, when the magnet 221 passes through the second Hall sensor 222, the second Hall sensor 222 will feed back the magnetic signal of the magnet 221 to the controller of the drive motor 215 and control the drive motor 215 to stop so that the clamp coupling 140 is in the return position. At this time, the rotation of the first pulley 121 of the rotary motor 120 is the unpowered rotation of the rotary motor 120 in a stopped state.

[0037] The second embodiment of the present invention provides an automatic return method for the rotating device 100. When the clamp coupling 140 is deviated from the return position due to the inertial force of the drive motor 215, the drive motor 215 is started to make the clamp coupling 140 continue to rotate. When the next magnet 221 of the clamp coupling 140 passes the first Hall sensor 222, the first Hall sensor 222 will detect the magnetic signal of the magnet 221 and feed it back to the controller of the drive motor 215. The controller controls the drive motor 215 to decelerate the rotation of the clamp coupling 140. When the magnet 221 passes the second Hall sensor 222 during the deceleration of the clamp coupling 140, the second Hall sensor 222 feeds back the magnetic signal of the magnet 221 to the controller of the drive motor 215 and controls the drive motor 215 to stop, so that the clamp coupling 140 is in the return position. That is, by detecting multiple magnets 221 one by one through two Hall sensors 222, it can be ensured that the clamp coupling 140 and the one-way rotating clamp installed thereon are in the return position, avoiding the problem that when the clamp coupling 140 stops rotating, the inertia force of the drive motor 210 of the return drive mechanism 210 drives the reduction gearbox 130 to rotate, causing the clamp coupling 140 and the one-way rotating clamp installed thereon to be misaligned. That is, the clamp coupling 140 and the one-way rotating clamp installed thereon detect the next magnet 221 through two Hall sensors 222 to ensure that the clamp coupling 140 and the one-way rotating clamp installed thereon are in the return position.

[0038] In order not to affect the normal use of the rotary device 100, the automatic straightening method of the rotary device 100 provided in the second embodiment of the present invention further includes a control method of the rotary device 100, and the control method of the rotary device 100 includes:

[0039] Stop the driving motor 215, start the rotary motor 120, and the rotary motor 120 drives the belt 150 through the first pulley 121. When the belt 150 is driving, the stepped shaft 213 and the first coupling 211 connected thereto are driven to rotate through the third pulley 216, and the one-way shaft 214 does not rotate; when the belt 150 is driving, the reduction box 130 is also driven to rotate through the second pulley 131, so that the clamp coupling 140 and the one-way rotary clamp installed thereon are in a rotating state. That is, when the rotary device 100 is in normal use, the return drive mechanism 210 only rotates the stepped shaft 213 and the first coupling 211, while the one-way shaft 214 and the second coupling 212 connected thereto do not rotate, and the driving motor 215 does not start. In other words, the return drive mechanism 210 is a two-stage type, the stage where the stepped shaft 213 is located is bidirectionally rotating, and the stage where the one-way shaft 214 is located is unidirectionally rotating.

[0040] The one-way rotary clamp automatic return device 200 and method provided in the above embodiment of the present invention add a return drive mechanism 210 and a return detection mechanism 220 to the traditional rotary device 100, so that the return drive mechanism 210 and the return detection mechanism 220 are attached to the original rotary device 100. Without starting the rotary motor 120 of the rotary device 100, the return drive mechanism 210 independently controls the rotation angle of the clamp coupling 140 of the reduction box 130 of the rotary device 100 and the one-way rotary clamp installed thereon, and the return detection mechanism 220 is used to detect the rotation angle of the one-way rotary clamp installed thereon. Mechanism 220 controls the start and stop of the return drive mechanism 210 to put the clamp coupling 140 and the one-way rotating clamp installed thereon into a return state, thereby facilitating the return control of the one-way rotating clamp, solving the problem that the rotary motor 120 of the rotating equipment 100 is difficult to control the one-way rotating clamp on the clamp coupling 140 for return, and making the one-way rotating clamp installed on the clamp coupling 140 in a return state before clamping, thereby facilitating the installation and disassembly operations of the clamped object on the one-way rotating clamp.

[0041] The one-way rotating clamp automatic return device 200 and method provided in the above-mentioned embodiment of the present invention detects the magnetic signal of the magnet 221 on the clamp coupling 140 by the Hall sensor 222 of the return detection mechanism 220 as the start and stop of the drive motor 215 of the return drive mechanism 210 to control the clamp coupling 140 on the reduction box 130 and the one-way rotating clamp installed thereon, thereby improving the degree of automation of the return control of the clamp coupling 140 and the one-way rotating clamp installed thereon, reducing the difficulty of the return control of the clamp coupling 140 and the one-way rotating clamp installed thereon, and reducing the labor intensity of the work.

[0042] The one-way rotary clamp automatic return device 200 and method provided in the above-mentioned embodiment of the present invention, by adding a return drive mechanism 210 and a return detection mechanism 220 to the traditional rotary equipment 100, controls the return of the separate rotary clamp installed on the clamp coupling 140, thereby avoiding the improvement of the rotary motor 120 and the reduction box 130 and reducing the cost.

[0043] The present invention is not limited to the above-mentioned specific implementation modes. Obviously, the above-mentioned embodiments are only some embodiments of the embodiments of the present invention, but not all embodiments. Based on the described embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the present invention. Those skilled in the art can make other levels of modifications and changes to the present invention. In this way, if these modifications and changes of the present invention fall within the scope of the claims of the present invention, the present invention is also intended to include these changes and changes.

Claims

1. An automatic return device for a one-way rotating fixture installed by a fixture coupling of a rotating device, the rotating device comprising a frame, a rotating motor and a reduction box arranged on the frame, the output end of the reduction box is connected to a fixture coupling, the fixture coupling is used to install a one-way rotating fixture, the rotating motor and the reduction box are connected through a belt transmission structure, the belt transmission structure comprises a first pulley respectively arranged on the rotating motor and a second pulley arranged on the reduction box, and a belt wound around the first pulley and the second pulley, characterized in that The one-way rotary fixture automatic return device comprises: The return drive mechanism comprises a stepped shaft and a one-way shaft connected by a first coupling, the one-way shaft is connected to a driving motor through a second coupling, the driving motor is connected to a controller, a third pulley is installed on the stepped shaft, bearings and bearing seats are installed at both ends of the stepped shaft, the return drive mechanism is installed on the frame of the rotating device through the bearing seat, and the third pulley is tensioned on the belt of the rotating device; the first pulley, the second pulley and the third pulley form a three-wheel belt transmission structure with the belt; The return detection mechanism includes a plurality of magnets mounted on the clamp coupling, and two Hall sensors arranged on the reduction gear housing at an angle to the cross section of the clamp coupling. The Hall sensors are connected to the controller of the drive motor of the return drive mechanism. The Hall sensors are used to detect the magnetic signals of the magnets and feed them back to the controller of the drive motor.

2. The automatic return device for a one-way rotary clamp according to claim 1, characterized in that: The two Hall sensors are mounted on the housing of the reduction box through a waist-shaped block.

3. The automatic return device for a one-way rotary clamp according to claim 1, characterized in that: The magnet is embedded and mounted on the clamp coupling with the axis of the clamp coupling as the center.

4. The automatic return device for a one-way rotary clamp according to claim 1, characterized in that: The controller is arranged in a control box, and the control box is arranged on the frame.

5. The automatic return device for a one-way rotary clamp according to claim 1, characterized in that: There are multiple belts, and the corresponding first pulley, second pulley and third pulley are all multiple to match the number of belts; or the corresponding first pulley, second pulley and third pulley are all provided with multiple belt grooves to match the number of belts.

6. A method for automatically returning a one-way rotary fixture, characterized in that: The one-way rotary clamp automatic return device according to any one of claims 1 to 5 comprises: The rotary motor stops and the drive motor starts. The drive motor rotates unidirectionally in the same direction through the second coupling, the one-way shaft, the first coupling and the stepped shaft. When the stepped shaft rotates, it drives the belt transmission through the third pulley. During the belt transmission, the second pulley on the reduction box and the first pulley of the rotary motor are driven to rotate, so that the clamp coupling on the reduction box rotates to change the angle of the one-way rotary clamp installed thereon. When the clamp coupling rotates, when a certain magnet on it passes through the first Hall sensor, the first Hall sensor will detect the magnetic signal of the magnet and feed it back to the controller of the drive motor. The controller controls the drive motor to decelerate so that the clamp coupling rotates at a reduced speed. When the magnet passes through the second Hall sensor when the clamp coupling rotates at a reduced speed, the second Hall sensor feeds back the magnetic signal of the magnet to the controller of the drive motor and controls the drive motor to stop, so that the clamp coupling is in the return position.

7. The method for automatically returning a one-way rotary fixture according to claim 6, characterized in that: When the clamp coupling is displaced from its return position due to the inertial force of the drive motor, the drive motor is started to make the clamp coupling continue to rotate. When the next magnet of the clamp coupling passes the first Hall sensor, the first Hall sensor will detect the magnetic signal of the magnet and feed it back to the controller of the drive motor. The controller controls the drive motor to decelerate so that the clamp coupling rotates at a slower speed. When the magnet passes the second Hall sensor during the decelerated rotation of the clamp coupling, the second Hall sensor feeds back the magnetic signal of the magnet to the controller of the drive motor and controls the drive motor to stop so that the clamp coupling is in the return position.

8. The method for automatically returning a one-way rotary clamp according to claim 6 or 7, characterized in that: The invention also includes a control method for a rotary device, wherein the control method for the rotary device includes: Stop the driving motor and start the rotary motor. The rotary motor drives the belt transmission through the first pulley. During belt transmission, the stepped shaft and the first coupling connected to it are driven to rotate through the third pulley, and the one-way shaft does not rotate. During belt transmission, the reduction box is also rotated through the second pulley to put the clamp coupling and the one-way rotary clamp installed thereon into a rotating state.

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