Servo motor synchronous testing device

Abstract

The invention discloses a servo motor synchronous testing device, which belongs to the technical field of press machines, and comprises a hollow bracket, and the center of the hollow area of the bracket is rotatably provided with a middle large gear. At least two first driven gears and at least two second driven gears which can be meshed with the middle large gear and are the same in specification are evenly distributed on the periphery of the middle large gear, and the at least two first driven gears and the at least two second driven gears are arranged in a spaced and staggered mode. The first driven gear and the second driven gear are connected with a driving servo motor and a feedback servo motor respectively, wherein the driving servo motor and the feedback servo motor are installed on the support and are the same in specification. The driving servo motors complete driving of the middle large gear through the first driven gear and then complete driving of the feedback servo motor through the second driven gear, and the at least two driving servo motors can simulate cooperation under working conditions. Whether the servo motors are synchronous or not is judged by testing the consistency of any driving servo motor and any feedback servo motor.

Description

Technical Field

[0001] The invention belongs to the technical field of presses, in particular to a servo motor synchronous testing device. Background Art

[0002] A press (including punching machines and hydraulic presses) is a versatile mechanical device with an ingenious structure, which is widely used in metal processing, plastic molding and stamping processes. Mechanical press: The motor drives a large pulley (usually also a flywheel) through a V-belt, and drives the crank slider mechanism through a gear pair and a clutch, so that the slider and the punch move straight down to perform forging work. After the work is completed, the slider moves upward, the clutch automatically disengages, and at the same time the automatic device on the crank shaft is turned on, so that the slider stops near the top dead center.

[0003] At present, servo motors are more and more widely used in the entire press industry. Servo motors have the characteristics of high precision, fast response, stable operation, etc., but at the same time, large-sized servo motors are expensive, resulting in huge equipment investment. A high-power servo motor can be replaced by using multiple small-power servo motors of the same power together, but the premise is that it is necessary to ensure that the operation of multiple small-power servo motors maintains consistent synchronization and feedback. At present, there is a lack of equipment that can test the synchronization of multiple servo motors. Summary of the invention

[0004] In order to solve the problem of lack of testing equipment for whether the synchronization and feedback of multiple low-power servo motors are consistent, the present invention provides a servo motor synchronization testing device.

[0005] The present invention is achieved through the following technical solutions: A servo motor synchronous testing device, comprising a bracket with a hollow interior, wherein a large intermediate gear is rotatably arranged at the center of the hollow area of ​​the bracket, and at least two driven gears 1 and 2 with the same specifications that can mesh with the large intermediate gear are evenly distributed on the outer periphery of the large intermediate gear, wherein at least two driven gears 1 and at least two driven gears 2 are spaced and staggered; The driven gear 1 and the driven gear 2 are respectively connected with a driving servo motor and a feedback servo motor which are installed on the bracket and have the same specifications.

[0006] The driving servo motor drives the middle large gear through driven gear one, and then drives the feedback servo motor through driven gear two. At least two driving servo motors can simulate the coordination under working conditions, and the consistency of any driving servo motor and any feedback servo motor can be tested to determine whether the above servo motors are synchronized.

[0007] A further improvement of the present invention is that the drive servo motor and the feedback servo motor are both equipped with encoders. The encoders monitor the rotation angle / speed data of the drive servo motor and the specific rotation angle / speed data of the feedback servo motor, and the motors with abnormal operation are found in time through data comparison.

[0008] A further improvement of the present invention is that the driving servo motor is installed on the top surface of the driven gear one; and the feedback servo motor is installed on the bottom surface of the driven gear two.

[0009] A further improvement of the present invention is that an intermediate gear shaft penetrates the axis of the intermediate large gear, and both ends of the intermediate gear shaft are connected to the bracket through deep groove ball bearings.

[0010] A further improvement of the present invention is that a locking nut is provided on the intermediate gear shaft to fix the relative position of the intermediate gear shaft and the intermediate large gear, which helps to improve the connection stability between the intermediate gear shaft and the intermediate large gear.

[0011] A further improvement of the present invention is that the bracket is provided with a second cover plate for sealing the end of the intermediate gear shaft. The second cover plate reduces the influence of the external environment on the deep groove ball bearing and avoids interference with the test data.

[0012] A further improvement of the present invention is that the inner ring of the driven gear 1 is provided with a motor transmission shaft 1, one end of which is connected to the driving servo motor, and the lower end of the motor transmission shaft 1 is mounted on the bracket through a deep groove ball bearing.

[0013] A further improvement of the present invention is that the bracket is provided with a cover plate 1 for sealing the bottom of the motor drive shaft 1.

[0014] A further improvement of the present invention is that the above-mentioned driving servo motor is installed on the bracket by bolts and through the motor mounting flange, and a deep groove ball bearing is provided between the rotating shaft of the driving servo motor and the bracket; a motor shaft spacer is provided outside the rotating shaft of the driving servo motor, and the motor shaft spacer is linked to an upper end portion of the motor transmission shaft through a flat key.

[0015] A further improvement of the present invention is that a gap is reserved between the upper end of the motor transmission shaft 1 and the inner top surface of the bracket, and the gap is filled with a spacer sleeve mounted on the motor shaft spacer sleeve.

[0016] A further improvement of the present invention is that the inner ring of the second driven gear is provided with a second motor transmission shaft having one end connected to a feedback servo motor, and the upper end of the second motor transmission shaft is mounted on the bracket via a deep groove ball bearing.

[0017] A further improvement of the present invention is that the bracket is provided with a cover plate 1 for sealing the top of the motor transmission shaft 2.

[0018] A further improvement of the present invention is that the feedback servo motor is mounted on the bracket by bolts and through 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 two lower ends of the motor drive shaft through a flat key.

[0019] A further improvement of the present invention is that a gap is reserved between the lower end of the second motor transmission shaft and the inner top surface of the bracket, and the gap is filled with a spacer sleeve mounted on the motor shaft spacer sleeve.

[0020] It can be seen from the above technical scheme that the beneficial effects of the present invention are: the driving servo motor completes the driving of the middle large gear through the driven gear one, and then completes the driving of the feedback servo motor through the driven gear two, at least two driving servo motors can simulate the coordination under working conditions, and whether the above servo motors are synchronized can be determined by testing the consistency of any driving servo motor and any feedback servo motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solution of the present invention, the accompanying drawings required for use in the description will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0022] Figure 1 It is a structural schematic diagram of a specific implementation mode of the present invention.

[0023] Figure 2 for Figure 1 Schematic diagram of the cross-section at AA.

[0024] Figure 3 for Figure 1 Schematic diagram of the cross-section at BB.

[0025] In the attached figure: 1. driving servo motor; 2. bracket; 3. motor mounting flange; 4. spacer; 5. motor shaft spacer; 6. flat key; 7. motor drive shaft 1; 8. cover plate 1; 9. deep groove ball bearing; 10. expansion sleeve; 11. middle large gear; 12. cover plate 2; 13. middle gear shaft; 14. locking nut; 15. cover plate 3; 16. motor drive shaft 2; 17. feedback servo motor. DETAILED DESCRIPTION

[0026] In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, the technical scheme of the present invention will be clearly and completely described below in conjunction with the drawings in this specific embodiment. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of them. Based on the embodiments in this patent, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this patent.

[0027] like Figure 1-Figure 3 As shown, the present invention discloses a servo motor synchronous testing device, comprising a bracket 2 with a hollow interior, wherein the center of the hollow area of ​​the bracket 2 is rotatably provided with an intermediate large gear 11, and the outer periphery of the intermediate large gear 11 is evenly distributed with at least two driven gears 1 and 2 which can mesh with the intermediate large gear 11 and have the same specifications, and at least two driven gears 1 and at least two driven gears 2 are arranged at intervals and staggered; the driven gears 1 and 2 are respectively connected with a driving servo motor 1 and a feedback servo motor 17 which are installed on the bracket 2 and have the same specifications. This layout helps to form an even distribution of the driving servo motor 1 and the feedback servo motor 17 on the outer periphery of the intermediate large gear 11. Encoders are installed on both the driving servo motor 1 and the feedback servo motor 17; the encoders monitor the rotation angle / speed data of the driving servo motor 1 and the specific rotation angle / speed data of the feedback servo motor 17, and the motors with abnormal operation can be found in time through data comparison.

[0028] The middle gear shaft 13 is passed through the axis of the middle gear 11, and a locking nut 14 is provided on the middle gear shaft 13 to fix the relative position of the middle gear shaft 13 and the middle gear 11; both ends of the middle gear shaft 13 are connected to the bracket 2 through deep groove ball bearings 9. The bracket 2 is provided with a cover plate 3 15 for sealing the ends of the middle gear shaft 13.

[0029] The driving servo motor 1 is installed on the top surface of the driven gear 1; the feedback servo motor 17 is installed on the bottom surface of the driven gear 2.

[0030] The driving servo motor 1 is installed on the bracket 2 through bolts and motor mounting flange 3, and a deep groove ball bearing 9 is provided between the rotating shaft of the driving servo motor 1 and the bracket 2; a motor shaft spacer 5 is provided outside the rotating shaft of the driving servo motor 1, and the motor shaft spacer 5 is linked with the upper end of the motor transmission shaft 7 through a flat key 6. A gap is reserved between the upper end of the motor transmission shaft 7 and the inner top surface of the bracket 2, and the gap is filled with a spacer 4 sleeved on the motor shaft spacer 5.

[0031] The inner ring of the driven gear is provided with a motor transmission shaft 7, one end of which is connected to the driving servo motor 1. The lower end of the motor transmission shaft 7 is installed on the bracket 2 through a deep groove ball bearing 9. The bracket 2 is provided with a cover plate 8 for sealing the bottom of the motor transmission shaft 7.

[0032] The feedback servo motor 17 is installed on the bracket 2 through bolts and 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 with the lower end of the motor transmission shaft 2 16 through a flat key 6. A gap is reserved between the lower end of the motor transmission shaft 2 16 and the inner top surface of the bracket 2, and the gap is filled with a spacer 4 sleeved on the motor shaft spacer 5.

[0033] The inner ring of the second driven gear is provided with a second motor transmission shaft 16 whose one end is connected to the feedback servo motor 17, and the upper end of the second motor transmission shaft 16 is installed on the bracket 2 through a deep groove ball bearing 9; the bracket 2 is provided with a cover plate 8 for sealing the top of the second motor transmission shaft 16.

[0034] In summary, the method of using the device is as follows: the drive servo motor 1 and the feedback servo motor 17 are staggered and evenly arranged around the outer periphery of the middle large gear 11, which optimizes the power transmission route. Assuming that the angle / speed data value on the drive servo motor 1 is a, and the angle / speed data on the feedback servo motor 17 is b, due to energy loss, the value of b is less than the value of a; according to the selection of gear specifications in practice, through the calculation 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, When 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 with qualified synchronization), the drive servo motor 1 and the feedback servo motor 17 are synchronized.

[0035] Since the speed of the driving servo motor 1 or the feedback servo motor 17 is somewhat different from the rated speed, and there is lateral clearance under gear meshing, the slip rate under speed synchronization conditions does not affect the gear meshing.

[0036] A servo motor synchronous testing device described in the present invention, 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 to achieve the function of installing the motor drive shaft 1 7 and the motor drive shaft 2 16; the driving servo motor 1 is fixed to the motor mounting flange 3 by bolts; the motor drive shaft 1 7 is fixed to the bracket 2 by a deep groove ball bearing 9 and a cover plate 1 8; the motor drive shaft 1 7 is connected to the driving servo motor 1 by a flat key 6, a motor shaft spacer 5, a spacer 4, and an expansion sleeve 10. The intermediate gear shaft 13 is fixed on the bracket 2 through the deep groove ball bearing 9 and the cover plate 2 12; the intermediate large gear 11 is fixed on the intermediate gear shaft 13 through the locking nut 14; the motor transmission shaft 2 16 is fixed on the bracket 2 through the motor mounting flange 3, the deep groove ball bearing 9 and the cover plate 3 15; the feedback servo motor 17 is fixed on the motor mounting flange 3 by bolts; the motor transmission shaft 2 16 is connected to the feedback servo motor 17 through the flat key 6, the motor shaft spacer 5 and the expansion sleeve 10. The four motor transmission shafts 1 7, the four motor transmission shafts 2 16 and the intermediate large gear 11 are connected through gear meshing. This structure can realize the transmission of the torque of the four driving servo motors 1 running simultaneously to the feedback servo motor 17 through the intermediate large gear 11, and can accurately detect the synchronization of the four driving servo motors 1. This detection device is easy to install, simple in structure, and easy for daily maintenance.

[0037] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one 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 present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A servo motor synchronous testing device, comprising a bracket (2) with a hollow interior, characterized in that: An intermediate large gear (11) is rotatably provided at the center of the hollow region of the bracket (2); at least two driven gears 1 and 2 of the same specification and capable of meshing with the intermediate large gear (11) are evenly distributed on the outer periphery of the intermediate large gear (11); at least two driven gears 1 and at least two driven gears 2 are arranged at intervals and staggered; and the driven gears 1 and 2 are respectively connected to a driving servo motor (1) and a feedback servo motor (17) of the same specification and mounted on the bracket (2).

2. A servo motor synchronous testing device according to claim 1, characterized in that: Encoders are installed on both the driving servo motor (1) and the feedback servo motor (17).

3. A servo motor synchronous testing device according to claim 1 or 2, characterized in that: The driving servo motor (1) is mounted on the top surface of the driven gear one; and the feedback servo motor (17) is mounted on the bottom surface of the driven gear two.

4. A servo motor synchronous testing device according to claim 3, characterized in that: An intermediate gear shaft (13) passes through the axis of the intermediate large gear (11), and both ends of the intermediate gear shaft (13) are connected to the bracket (2) via deep groove ball bearings (9) respectively.

5. A servo motor synchronous testing device according to claim 4, characterized in that: The intermediate gear shaft (13) is provided with a locking nut (14) for fixing the relative position of the intermediate gear shaft (13) and the intermediate large gear (11).

6. A servo motor synchronous testing device according to claim 4, characterized in that: The bracket (2) is provided with a second cover plate (12) for sealing the end of the intermediate gear shaft (13).

7. A servo motor synchronous testing device according to claim 3, characterized in that: The inner ring of the driven gear 1 is provided with a motor transmission shaft 1 (7) whose one end is connected to the driving servo motor (1), and the lower end of the motor transmission shaft 1 (7) is mounted on the bracket (2) via a deep groove ball bearing (9).

8. A servo motor synchronous testing device according to claim 7, characterized in that: The driving servo motor (1) is mounted on the bracket (2) by means of bolts and via a motor mounting flange (3), and a deep groove ball bearing (9) is provided between the rotating shaft of the driving servo motor (1) and the bracket (2); a motor shaft spacer (5) is provided outside the rotating shaft of the driving servo motor (1), and the motor shaft spacer (5) is linked to an upper end portion of a motor transmission shaft (7) via a flat key (6).

9. A servo motor synchronous testing device according to claim 3, characterized in that: The inner ring of the second driven gear is provided with a second motor transmission shaft (16) one end of which is connected to a feedback servo motor (17); the upper end of the second motor transmission shaft (16) is mounted on the bracket (2) via a deep groove ball bearing (9).

10. A servo motor synchronous testing device according to claim 9, characterized in that: The feedback servo motor (17) is mounted on the bracket (2) by means of bolts and via 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 transmission shaft (16) via a flat key (6).

Images