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CN-224218226-U - Single-shaft high-precision servo electric actuator

CN224218226UCN 224218226 UCN224218226 UCN 224218226UCN-224218226-U

Abstract

The utility model provides a high-accuracy servo electric actuator of unipolar, include: the first servo motor is connected with a screw rod of the first servo motor through a coupler, at least 2 nuts matched with the screw rod, a butterfly spring set is matched between the 2 nuts, a sliding rail is arranged on the inner wall of the side edge of the shell, the second servo motor is arranged on a sliding block matched with the sliding rail, and a fixed bracket is fixed between the second servo motor and the sleeve; through the scheme, the position and the speed of the actuator are controlled more accurately through the synergistic effect of the two motors in the double-motor driving, errors are reduced, the response speed of the actuator is improved, the two motors act simultaneously or respectively and independently, the motion state is quickly adjusted according to different working condition requirements, the actuator can respond to control instructions more quickly, the requirements of high-precision application scenes are met, and the overall performance and the reliability of the device are improved.

Inventors

  • WANG BAOGUO
  • QIU YONG
  • WANG HAO
  • ZHANG BIN

Assignees

  • 银川合宜科技有限公司

Dates

Publication Date
20260508
Application Date
20250527

Claims (10)

  1. 1. The single-shaft high-precision servo electric actuator is characterized by comprising a first servo motor (1), a screw rod (2) connected with the first servo motor (1) through a coupler (11), at least 2 nuts (3) matched with the screw rod (2), a belleville spring group (4) matched between the 2 nuts (3), a sleeve (5) welded at the bottom of the nuts (3), a base (10) arranged at the bottom of the sleeve (5), a guide rail (7) arranged behind the sleeve (5) and connected through a sliding block (9), a shell (12) arranged outside the guide rail (7) and a support frame (8) fixed at the bottom of the shell (12); The device also comprises a sliding rail (21) arranged on the inner wall of the side edge of the shell (12), a second servo motor (14) arranged on a sliding block matched with the sliding rail (21), and a fixed bracket (15) fixed between the second servo motor (14) and the sleeve (5).
  2. 2. The single-axis high-precision servo electric actuator according to claim 1, characterized in that the first servo motor (1) is fixed above the guide rail (7).
  3. 3. The single-shaft high-precision servo electric actuator according to claim 1, wherein the nut (3) is sleeved with a hollow shaft stepping motor (23).
  4. 4. The single-shaft high-precision servo electric actuator according to claim 1, wherein a sleeve slider (19) is arranged at the bottom of the sleeve (5), one end of the sleeve slider (19) is sleeved on the connecting rod (13), and a plurality of buffers (20) are fixedly arranged at the bottom of the sleeve slider (19).
  5. 5. The single-axis high-precision servo electric actuator according to claim 1, characterized in that the belleville spring group (4) adopts an asymmetric superposition mode.
  6. 6. The single-shaft high-precision servo electric actuator according to claim 1, wherein 2 locking devices (18) are symmetrically arranged on the outer sides of 2 nuts (3).
  7. 7. A single-axis high-precision servo-actuator according to claim 3, characterized in that the side of the housing (12) is provided with a grating scale (6).
  8. 8. The single-axis high-precision servo electric actuator according to claim 7, characterized in that the grating window on the grating ruler (6) is fixed outside the sleeve (5).
  9. 9. The single-shaft high-precision servo electric actuator according to claim 7, wherein encoders are arranged on the outer sides of the first servo motor (1), the second servo motor (14) and the hollow shaft stepping motor (23).
  10. 10. The single-shaft high-precision servo electric actuator according to claim 9, wherein the first servo motor (1), the second servo motor (14), the hollow shaft stepping motor (23), the grating ruler (6) and the encoder are electrically connected with a controller.

Description

Single-shaft high-precision servo electric actuator Technical Field The utility model relates to the technical field of electric actuators, in particular to a single-shaft high-precision servo electric actuator. Background In the field of modern industrial automation, precise motion control is a key to achieving efficient, stable operation of numerous devices and systems. The servo electric actuator is used as a device for converting electric energy into mechanical energy and accurately controlling position, speed and force, and is widely applied to various industries such as robots, numerical control machine tools, aerospace, automatic production lines and the like. Although the conventional servo motor actuator has achieved a certain result in the aspect of single-axis motion control, there are still some problems to be solved. In terms of precision, with the continuous improvement of the requirements of industrial production on product quality and production efficiency, the requirements on the motion precision of an actuator are also increasingly severe. Many existing single-axis servo electric actuators have difficulty in achieving high-precision motion control requirements due to limitations of mechanical structural design and transmission components. The traditional servo electric actuator adopts a motor to drive a belt so as to drive a screw rod to move, and in the transmission process of the screw rod and a nut, due to factors such as gaps, friction, manufacturing errors of components and the like, deviation exists between the actual movement position and the theoretical setting position of the actuator, so that the control precision of the whole system is affected. Disclosure of utility model The utility model provides a single-shaft high-precision servo electric actuator, which aims to solve the problem of poor precision of the traditional servo electric actuator caused by component errors and other factors. In order to solve the problems, the utility model provides a single-shaft high-precision servo electric actuator, which comprises a first servo motor, a screw rod connected with the first servo motor through a coupler, at least 2 nuts matched with the screw rod, a belleville spring set matched between the 2 nuts, a sleeve welded at the bottom of the nuts, a base arranged at the bottom of the sleeve, a guide rail arranged at the rear of the sleeve and connected through a sliding block, a shell arranged at the outer side of the guide rail, and a support frame fixed at the bottom of the shell, wherein the guide rail is a guide rail; the sliding rail is arranged on the inner wall of the side edge of the shell, the second servo motor is arranged on a sliding block matched with the sliding rail, and the fixed bracket is fixed between the second servo motor and the sleeve; Through the scheme, the position and the speed of the actuator are controlled more accurately through the synergistic effect of the two motors in the double-motor driving, errors are reduced, the response speed of the actuator is improved, the two motors act simultaneously or respectively and independently, the motion state is quickly adjusted according to different working condition requirements, the actuator can respond to control instructions more quickly, in addition, the load capacity and the stability of the actuator are enhanced through the double-motor driving, when the load is relatively large or complex working conditions are faced, the two motors can share the load jointly, the pressure of a single motor is reduced, the reliability of the whole system is improved, the requirements of high-precision application scenes are met, and the overall performance and the reliability of equipment are improved. According to one embodiment of the utility model, the first servo motor is fixed above the guide rail, through the scheme, the space above the actuator is fully utilized, excessive occupied space in the horizontal direction is avoided, the overall structure of the actuator is more compact, more efficient installation can be realized in a limited space, the servo motor is particularly suitable for equipment or a system with strict requirements on the installation space, meanwhile, the servo motor can generate certain heat in the working process and is fixed above the guide rail, and relatively wide space is arranged around the servo motor, so that heat dissipation is facilitated, motor performance reduction or damage caused by heat accumulation is avoided, and long-term stable operation of the actuator is ensured. According to one embodiment of the utility model, the hollow shaft stepping motor is sleeved on the nut, and through the scheme, the hollow shaft stepping motor has high-precision stepping control characteristics, and after being sleeved on the nut, the nut is driven by the nut instead of the second servo motor, so that more precise displacement is realized, and the positioning precision and the motion control precis