A synchronous testing device for servo motor

Abstract

The application discloses a synchronous testing device for servo motors and belongs to the technical field of presses. The device comprises a support with an internal cavity. A middle gear is arranged at the center of the hollow area of the support. At least two driven gears one and two, which can be engaged with the middle gear and have the same specifications, are uniformly distributed on the periphery of the middle gear. The at least two driven gears one and the at least two driven gears two are arranged in a staggered manner. A driving servo motor and a feedback servo motor, which have the same specifications, are connected to the driven gears one and two respectively and are installed on the support. The driving servo motor drives the middle gear through the driven gears one, and then drives the feedback servo motor through the driven gears two. The at least two driving servo motors can simulate the cooperation under working conditions. The consistency of any driving servo motor and any feedback servo motor is tested to determine whether the servo motors are synchronous.

Description

Technical Field

[0001] This invention belongs to the field of press technology, specifically a servo motor synchronous testing device. Background Technology

[0002] A press (including punch presses and hydraulic presses) is a sophisticated and versatile mechanical device widely used in metal processing, plastic molding, and stamping processes. A mechanical press is driven by an electric motor via a V-belt to a large pulley (often also serving as a flywheel). This pulley, through a gear pair and clutch, drives a crank-slider mechanism, causing the slide and punch to descend linearly for forging. After the work is completed, the slide rises, the clutch automatically disengages, and simultaneously, an automatic actuator on the crankshaft engages, stopping the slide near the top dead center.

[0003] Servo motors are increasingly widely used in the press industry. They are characterized by high precision, fast response, and stable operation. However, large-sized servo motors are expensive, resulting in huge equipment investments. A high-power servo motor can be replaced by multiple low-power servo motors of the same power. However, it is necessary to ensure that the operation of multiple low-power servo motors maintains consistency, synchronization, and feedback. Currently, there is a lack of equipment that can test the synchronization of multiple servo motors. Summary of the Invention

[0004] To address the lack of testing equipment for assessing the synchronization and feedback consistency of multiple low-power servo motors, this invention provides a servo motor synchronization testing device.

[0005] This invention is achieved through the following technical solution:

[0006] A servo motor synchronization testing device includes a hollow support frame. A central large gear is rotatably provided at the center of the hollow area of ​​the support frame. At least two driven gears of the same specification, namely driven gear 1 and driven gear 2, are evenly distributed around the outer periphery of the central large gear. The at least two driven gears 1 and at least two driven gears 2 are spaced apart and staggered.

[0007] Driven gear one and driven gear two are respectively connected to a drive servo motor and a feedback servo motor of the same specifications, which are mounted on the bracket.

[0008] The drive servo motor drives the intermediate large gear through the driven gear one, and then drives the feedback servo motor through the driven gear two. At least two drive servo motors can simulate the coordination under working conditions. The synchronization of the above servo motors is determined by testing the consistency of any drive servo motor and any feedback servo motor.

[0009] A further improvement of this invention is that encoders are installed on both the drive servo motor and the feedback servo motor. By monitoring the rotation angle / speed data of the drive servo motor and the specific rotation angle / speed data of the feedback servo motor through the encoders, abnormal motor operation can be detected promptly through data comparison.

[0010] A further improvement of the present invention is that the aforementioned drive servo motor is mounted on the top surface of the driven gear one; and the feedback servo motor is mounted on the bottom surface of the driven gear two.

[0011] A further improvement of the present invention is that an intermediate gear shaft passes through the center of the aforementioned intermediate large gear, and the two ends of the intermediate gear shaft are respectively connected to the bracket by deep groove ball bearings.

[0012] A further improvement of the present invention is that a locking nut is provided on the aforementioned intermediate gear shaft to fix the relative position of the intermediate gear shaft and the intermediate large gear. This helps to improve the connection stability between the intermediate gear shaft and the intermediate large gear.

[0013] A further improvement of the present invention is that the aforementioned bracket is provided with a second cover plate to seal the end of the intermediate gear shaft. The second cover plate reduces the influence of the external environment on the deep groove ball bearing, thus avoiding interference with test data.

[0014] A further improvement of the present invention is that the inner ring of the driven gear is provided with a motor drive shaft one, one end of which is connected to a servo motor, and the lower end of the motor drive shaft one is mounted on the bracket by a deep groove ball bearing.

[0015] A further improvement of the present invention is that the bracket is provided with a cover plate that seals the bottom of the motor drive shaft.

[0016] A further improvement of the present invention is that the aforementioned drive servo motor is mounted on the bracket by bolts and a motor mounting flange, and a deep groove ball bearing is provided between the shaft of the drive servo motor and the bracket; a motor shaft spacer is provided outside the shaft of the drive servo motor, and the motor shaft spacer is linked to an upper end of the motor drive shaft by a flat key.

[0017] A further improvement of the present invention is that a gap is reserved between the upper end of the motor drive shaft and the inner top surface of the bracket, and the gap is filled with a spacer sleeved on the motor shaft spacer sleeve.

[0018] A further improvement of the present invention is that the inner ring of the driven gear two is provided with a motor drive shaft two, one end of which is connected to the feedback servo motor, and the upper end of the motor drive shaft two is mounted on the bracket by a deep groove ball bearing.

[0019] A further improvement of the present invention is that the bracket is provided with a cover plate to seal the top of the motor drive shaft II.

[0020] A further improvement of the present invention is that the aforementioned feedback servo motor is mounted on the bracket by bolts and a motor mounting flange, and a deep groove ball bearing is provided between the rotating shaft of the feedback servo motor and the bracket; a motor shaft spacer is provided outside the rotating shaft of the feedback servo motor, and the motor shaft spacer is linked to the lower end of the motor drive shaft by a flat key.

[0021] A further improvement of the present invention is that a gap is reserved between the lower end of the above-mentioned motor drive shaft II and the inner top surface of the bracket, and the gap is filled with a spacer sleeved on the motor shaft spacer sleeve.

[0022] As can be seen from the above technical solution, the beneficial effects of the present invention are: the drive servo motor drives the intermediate large gear through the driven gear one, and then drives the feedback servo motor through the driven gear two. At least two drive servo motors can simulate the coordination under working conditions. The synchronization of the above servo motors can be determined by testing the consistency of any drive servo motor and any feedback servo motor. Attached Figure Description

[0023] To more clearly illustrate the technical solution of the present invention, the accompanying drawings used in the description will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a structural schematic diagram of a specific embodiment of the present invention.

[0025] Figure 2 for Figure 1 A schematic diagram of the cross-section at point AA.

[0026] Figure 3 for Figure 1 Schematic diagram of the cross section at BB.

[0027] In the attached diagram: 1. Drive servo motor; 2. Bracket; 3. Motor mounting flange; 4. Spacer; 5. Motor shaft spacer; 6. Flat key; 7. Motor drive shaft one; 8. Cover plate one; 9. Deep groove ball bearing; 10. Expansion sleeve; 11. Intermediate large gear; 12. Cover plate two; 13. Intermediate gear shaft; 14. Locking nut; 15. Cover plate three; 16. Motor drive shaft two; 17. Feedback servo motor. Detailed Implementation

[0028] To make the objectives, features, and advantages of this invention more apparent and understandable, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this patent, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this patent.

[0029] like Figures 1-3 As shown, this invention discloses a servo motor synchronization testing device, including a hollow support 2. A central large gear 11 is rotatably mounted at the center of the hollow area of ​​the support 2. At least two driven gears (first and second) of the same specification, capable of meshing with the central large gear 11, are evenly distributed around the outer periphery of the central large gear 11. The at least two driven gears (first and second) are spaced apart and staggered. A drive servo motor 1 and a feedback servo motor 17 of the same specification, mounted on the support 2, are respectively connected to the driven gears (first and second). This layout helps to achieve an even distribution of the drive servo motors 1 and 17 around the central large gear 11. Encoders are installed on both the drive servo motor 1 and the feedback servo motor 17. The encoders monitor the rotation angle / speed data of the drive servo motor 1 and the specific rotation angle / speed data of the feedback servo motor 17. By comparing the data, abnormal motor operation can be detected in a timely manner.

[0030] An intermediate gear shaft 13 passes through the center of the intermediate large gear 11. A locking nut 14 is provided on the intermediate gear shaft 13 to fix the relative position of the intermediate gear shaft 13 and the intermediate large gear 11. The two ends of the intermediate gear shaft 13 are respectively connected to the bracket 2 by deep groove ball bearings 9. The bracket 2 is provided with a cover plate 3 15 to seal the end of the intermediate gear shaft 13.

[0031] The drive servo motor 1 is mounted on the top surface of the driven gear one; the feedback servo motor 17 is mounted on the bottom surface of the driven gear two.

[0032] The drive servo motor 1 is mounted on the bracket 2 via bolts and a motor mounting flange 3, and a deep groove ball bearing 9 is provided between the shaft of the drive servo motor 1 and the bracket 2; a motor shaft spacer 5 is provided outside the shaft of the drive servo motor 1, and the motor shaft spacer 5 is linked to the upper end of the motor drive shaft 7 via a flat key 6. A gap is reserved between the upper end of the motor drive shaft 7 and the inner top surface of the bracket 2, and the gap is filled with a spacer 4 fitted on the motor shaft spacer 5.

[0033] The inner ring of the driven gear is provided with a motor drive shaft 7, one end of which is connected to the drive servo motor 1. The lower end of the motor drive shaft 7 is mounted on the bracket 2 through a deep groove ball bearing 9. The bracket 2 is provided with a cover plate 8 that seals the bottom of the motor drive shaft 7.

[0034] The feedback servo motor 17 is mounted on the bracket 2 via bolts and a motor mounting flange 3, and a deep groove ball bearing 9 is provided between the rotating shaft of the feedback servo motor 17 and the bracket 2; a motor shaft spacer 5 is provided outside the rotating shaft of the feedback servo motor 17, and the motor shaft spacer 5 is linked to the lower end of the second motor drive shaft 16 via a flat key 6. A gap is reserved between the lower end of the second motor drive shaft 16 and the inner top surface of the bracket 2, and the gap is filled with a spacer 4 fitted on the motor shaft spacer 5.

[0035] The inner ring of the driven gear is provided with a motor drive shaft 16, one end of which is connected to the feedback servo motor 17. The upper end of the motor drive shaft 16 is mounted on the bracket 2 through a deep groove ball bearing 9. The bracket 2 is provided with a cover plate 8 that seals the top of the motor drive shaft 16.

[0036] In summary, the usage of this device involves the drive servo motor 1 and the feedback servo motor 17 being arranged alternately and evenly around the outer circumference of the central large gear 11, thus optimizing the power transmission path. Assuming the angle / speed data of the drive servo motor 1 is 'a' and the angle / speed data of the feedback servo motor 17 is 'b', due to energy loss, the value of 'b' is less than the value of 'a'. Based on the actual selection of gear specifications and through calculations of energy loss, it is assumed that the average angle / speed data of the drive servo motor 1 and the feedback servo motor 17 under theoretical conditions is 'c'.

[0037] If the test value range of the drive servo motor 1 or the feedback servo motor 17 within the normal range does not exceed x% of c (x% is the slip rate that meets the synchronization requirements), then the drive servo motor 1 and the feedback servo motor 17 are synchronized.

[0038] Since the speed of the driving servo motor 1 or the feedback servo motor 17 differs from the rated speed, and there is lateral clearance under gear meshing, the slip rate under speed synchronization conditions will not affect the gear meshing.

[0039] The present invention discloses a servo motor synchronous testing device. The bracket 2 is fixed to the laboratory floor by expansion bolts and is an integral part of the entire experiment. The motor mounting flange 3 is fixed to the bracket 2 by bolts, realizing the installation of motor drive shaft 7 and motor drive shaft 16. The driving servo motor 1 is fixed to the motor mounting flange 3 by bolts. The motor drive shaft 7 is fixed to the bracket 2 by a deep groove ball bearing 9 and a cover plate 8. The motor drive shaft 7 is connected to the driving servo motor 1 by a flat key 6, a motor shaft spacer 5, a spacer 4, an expansion sleeve 10. The intermediate gear shaft 13 is fixed to the bracket 2 via a deep groove ball bearing 9 and a second cover plate 12; the intermediate large gear 11 is fixed to the intermediate gear shaft 13 via a lock nut 14; the second motor drive shaft 16 is fixed to the bracket 2 via a motor mounting flange 3, a deep groove ball bearing 9, and a third cover plate 15; the feedback servo motor 17 is fixed to the motor mounting flange 3 via bolts; the second motor drive shaft 16 is connected to the feedback servo motor 17 via a flat key 6, a motor shaft spacer 5, and an expansion sleeve 10. The four motor drive shafts 17, four motor drive shafts 16, and one intermediate large gear 11 are connected by gear meshing. This structure enables the torque of four driving servo motors 1 running simultaneously to be transmitted to the feedback servo motor 17 via the intermediate large gear 11, accurately detecting the synchronization of the four driving servo motors 1. This detection device is easy to install, has a simple structure, and is easy to maintain.

[0040] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A servo motor synchronization testing device, comprising an internally hollow support (2), characterized in that, A central large gear (11) is rotatably mounted in the center of the hollow area of ​​the bracket (2). At least two driven gears of the same specifications, namely driven gear 1 and driven gear 2, are evenly distributed around the outer periphery of the central large gear (11) and can mesh with it. The at least two driven gears 1 and at least two driven gears 2 are spaced apart and staggered. Drive servo motors (1) and feedback servo motors (17) of the same specifications are respectively connected to driven gear 1 and driven gear 2, which are mounted on the bracket (2). The drive servo motor (1) is mounted on the top surface of driven gear 1. The feedback servo motor (17) is mounted on the bottom surface of the driven gear 2; the intermediate gear shaft (13) passes through the center of the intermediate large gear (11), and the two ends of the intermediate gear shaft (13) are respectively connected to the bracket (2) by deep groove ball bearings (9); the inner ring of the driven gear 1 is provided with a motor drive shaft 1 (7) with one end connected to the drive servo motor (1), and the lower end of the motor drive shaft 1 (7) is mounted on the bracket (2) by deep groove ball bearings (9); the drive servo motor (1) is mounted on the bracket by bolts and through the motor mounting flange (3). (2) On the bracket (2), a deep groove ball bearing (9) is provided between the shaft of the drive servo motor (1) and the bracket (2); a motor shaft spacer (5) is provided outside the shaft of the drive servo motor (1), and the motor shaft spacer (5) is linked to the upper end of the motor drive shaft (7) through a flat key (6); the inner ring of the driven gear is provided with a motor drive shaft (16) one end of which is connected to the feedback servo motor (17), and the upper end of the motor drive shaft (16) is mounted on the bracket (2) through a deep groove ball bearing (9); the feedback servo motor (17) is connected to the bracket (2) through bolts and motor The mounting flange (3) is mounted on the bracket (2), and a deep groove ball bearing (9) is provided between the shaft of the feedback servo motor (17) and the bracket (2); a motor shaft spacer (5) is provided outside the shaft of the feedback servo motor (17), and the motor shaft spacer (5) is linked to the lower end of the motor drive shaft (16) via a flat key (6); encoders are installed on both the drive servo motor (1) and the feedback servo motor (17); a locking nut (14) is provided on the intermediate gear shaft (13) to fix the relative position of the intermediate gear shaft (13) and the intermediate large gear (11).

2. The servo motor synchronization testing device according to claim 1, characterized in that, The bracket (2) is provided with a cover plate (12) that seals the end of the intermediate gear shaft (13).

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