A dual-axis high-precision servo electric actuator

Abstract

This utility model provides a dual-axis high-precision servo electric actuator, comprising: a base, a support seat on the base, a rotary cylinder fixed above the support seat, a flange connected to the rotary cylinder, a bracket fixedly connected to the flange via a fixing frame, a slide rail fixedly connected to the bracket, a servo motor fixed on the slide rail, a lead screw connected to the servo motor via a coupling, and several ball nuts cooperating with the lead screw. Through this design, the rotary cylinder, servo motor, lead screw, and other components are organically integrated, enabling highly coordinated movement between the axes. The rotary cylinder provides rotational motion, and the servo motor drives the lead screw to achieve linear motion. The two work together to reduce motion deviations caused by independent movement of each axis in traditional actuators, thereby significantly improving the overall coordination of the actuator's movement.

Description

Technical Field

[0001] This utility model relates to the field of electric actuator technology, specifically to a dual-axis high-precision servo electric actuator. Background Technology

[0002] In the field of industrial automation control, electric actuators, as key components, are widely used in various scenarios requiring precise position and motion control. Currently, this field generally adopts a single-axis drive structure, using a servo motor in conjunction with a lead screw to achieve linear motion.

[0003] Traditional electric actuators have limitations in terms of precision, stability, and multi-axis collaborative control, making it difficult to meet the growing demands for high-precision and high-efficiency production. On automated assembly lines with extremely high positional accuracy requirements, traditional actuators may cause assembly errors due to insufficient precision, affecting product quality. In multi-axis linkage control scenarios, the poor coordination between the axes of traditional actuators leads to problems such as inaccurate motion trajectories and slow response speeds. Utility Model Content

[0004] This utility model provides a dual-axis high-precision servo electric actuator to solve the problems of inaccurate motion trajectory and slow response speed caused by poor coordination between axes in traditional electric actuators.

[0005] To address the aforementioned problems, this utility model provides a dual-axis high-precision servo electric actuator, comprising: a base, a support seat mounted on the base, a rotary cylinder fixed above the support seat, a flange connected to the rotary cylinder, a bracket fixedly connected to the flange via a fixing frame, a slide rail fixedly connected to the bracket, a servo motor fixedly mounted on the slide rail, a lead screw connected to the servo motor via a coupling, and several ball nuts cooperating with the lead screw. This design organically integrates the rotary cylinder, servo motor, and lead screw, enabling highly coordinated motion between the axes. The rotary cylinder provides rotational motion, while the servo motor drives the lead screw to achieve linear motion. This mutual cooperation reduces motion deviations caused by independent axis movements in traditional actuators, thereby significantly improving the overall coordination of the actuator's motion.

[0006] According to one embodiment of this utility model, a hollow shaft stepper motor is externally fitted to the ball nut. Through the above solution, the hollow shaft stepper motor can cooperate with an advanced control system to compensate for the errors generated by the actuator during operation in real time. Due to motion deviations caused by factors such as mechanical wear and temperature changes, the stepper motor can be finely adjusted according to the feedback signal to ensure that the motion of the actuator always remains within the predetermined accuracy range, effectively improving product quality and production stability.

[0007] According to one embodiment of this utility model, a sliding sleeve is welded to the bottom of the ball nut. The sliding sleeve is fitted onto the outside of the lead screw. This design provides an additional guiding structure for the movement of the ball nut. When the lead screw rotates and drives the ball nut to perform linear motion, the cooperation between the sliding sleeve and the lead screw effectively constrains the direction of movement of the ball nut, preventing it from deviating or wobbling. This ensures that the actuator's end effector moves precisely along a predetermined trajectory, greatly improving the accuracy of motion guidance.

[0008] According to one embodiment of the present invention, a limiting block is connected to the bottom of the sliding sleeve. Through the above scheme, the limiting block can clearly define the movement stroke of the ball nut and the connected components. During the operation of the actuator, when the sliding sleeve moves to the preset limit position with the ball nut, the limiting block contacts the fixed structure of the actuator, thereby preventing the ball nut from continuing to move, ensuring that its movement range is strictly controlled within a safe and effective range, and avoiding damage to other components inside the actuator due to excessive movement.

[0009] According to one embodiment of the present invention, a grating ruler is provided on the side of the slide rail. Through the above scheme, the grating ruler can feed back the position information of the actuator to the control system in real time, so that the control system can know the actual position of the actuator at any time. Based on this feedback, the control system can accurately adjust the motion parameters of the motor, correct the position deviation in time, and ensure that the actuator always runs according to the predetermined trajectory and position requirements, thereby improving the control accuracy and stability of the entire system.

[0010] According to one embodiment of the present invention, the hollow shaft stepper motor, sliding sleeve, and limiting block are all connected to the slide rail via a slider. Through the above solution, each component is constrained and guided by the slide rail during movement, and can maintain a highly consistent movement trajectory. In production processes that require precise repetition of a certain action, it ensures that the position and posture of each operation are exactly the same, effectively improving the production quality and consistency of the product.

[0011] According to one embodiment of the present invention, the support base is fixed to the base by hexagonal bolts. With the above solution, during the operation of the actuator, the support base needs to withstand various forces from the motor, transmission components and external loads. The high-strength fastening effect of the hexagonal bolts can ensure that the support base will not loosen or shift due to vibration, impact or load changes, thus ensuring the stability and reliability of the overall structure of the actuator.

[0012] According to one embodiment of this utility model, the flange, servo motor, and hollow shaft stepper motor are all equipped with absolute encoders on their outer sides. Through the above scheme, the high-speed data acquisition and processing capability of the absolute encoder enables the control system to respond quickly to changes in the motor position and obtain its own rotation angle and position in real time and accurately. When the actuator is subjected to external interference or load changes, the control system can make rapid adjustments based on the position information fed back by the encoder and restore the normal operating state of the actuator in a timely manner, thereby improving the dynamic response capability and anti-interference capability of the actuator.

[0013] According to one embodiment of this utility model, the rotary cylinder, servo motor, hollow shaft stepper motor, grating ruler, and absolute encoder are all electrically connected to the controller. Through the above scheme, the movement of the rotary cylinder, servo motor, and hollow shaft stepper motor is uniformly coordinated. The rotary cylinder is responsible for steering, while the servo motor and hollow shaft stepper motor control the movement and positioning of the actuator. The electrical connection enables the controller to accurately coordinate the action sequence, speed, and time of each component according to a preset program, thereby achieving efficient and accurate collaborative operation.

[0014] The technical advantages of this application are as follows:

[0015] This application provides a dual-axis high-precision servo electric actuator that organically integrates components such as a rotary cylinder, a servo motor, and a lead screw, enabling highly coordinated movements between the axes. The rotary cylinder provides rotational motion, while the servo motor drives the lead screw to achieve linear motion. The two work together to reduce motion deviations caused by independent movements of each axis in traditional actuators, thereby significantly improving the overall coordination of the actuator's movements. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of a dual-axis high-precision servo electric actuator provided by this utility model.

[0017] Figure 2 This is a top view structural diagram of a dual-axis high-precision servo electric actuator provided by this utility model.

[0018] Figure 3 This utility model provides Figure 2 Schematic diagram of the cross section at point AA.

[0019] Explanation of reference numerals in the attached figures:

[0020] 1. Base; 2. Support seat; 3. Rotary cylinder; 4. Flange; 5. Fixing frame; 6. Bracket; 7. Slide rail; 8. Servo motor; 9. Lead screw; 10. Hollow shaft stepper motor; 11. Sliding sleeve; 12. Grating ruler; 13. Limit block; 14. Coupling; 15. Ball nut. Detailed Implementation

[0021] The following will be combined with the appendix Figures 1-3 The embodiments of the technical solution of this application are described in detail below. The following embodiments are only used to illustrate the technical solution of this application more clearly, and are therefore only examples and should not be used to limit the scope of protection of this application.

[0022] Reference Figures 1-3 This utility model provides a dual-axis high-precision servo electric actuator, comprising: a base 1, a support 2 mounted on the base 1, a rotary cylinder 3 fixed above the support 2, a flange 4 connected to the rotary cylinder 3, a bracket 6 fixedly connected to the flange 4 via a fixing frame 5, a slide rail 7 fixedly connected to the bracket 6, a servo motor 8 fixed on the slide rail 7, a lead screw 9 connected to the servo motor 8 via a coupling 14, and several ball nuts 15 cooperating with the lead screw 9. Through the above scheme, the rotary cylinder 3, servo motor 8, lead screw 9 and other components are organically integrated, enabling highly coordinated movement between the axes. The rotary cylinder 3 provides rotational motion, and the servo motor 8 drives the lead screw 9 to achieve linear motion. The two cooperate with each other, reducing the motion deviation caused by the independent movement of each axis in traditional actuators, thereby significantly improving the overall coordination of the actuator's movement.

[0023] The aforementioned ball nut 15 is externally fitted with a hollow shaft stepper motor 10. Through the above scheme, the hollow shaft stepper motor 10 can work with an advanced control system to compensate for errors generated by the actuator during operation in real time. Due to motion deviations caused by factors such as mechanical wear and temperature changes, the stepper motor can be finely adjusted according to the feedback signal to ensure that the motion of the actuator always remains within the predetermined accuracy range, effectively improving product quality and production stability.

[0024] A sliding sleeve 11 is welded to the bottom of the ball nut 15. The sliding sleeve 11 is fitted onto the outside of the lead screw 9. This design provides an additional guiding structure for the movement of the ball nut 15. When the lead screw 9 rotates, driving the ball nut 15 to move linearly, the cooperation between the sliding sleeve 11 and the lead screw 9 effectively constrains the direction of movement of the ball nut 15, preventing it from deviating or wobbling. This ensures that the actuator's end effector moves precisely along a predetermined trajectory, greatly improving the accuracy of motion guidance.

[0025] The ball nut 15 is equipped with an electromagnetic brake. After the actuator stops moving, the ball nut 15 may move slightly due to external vibration, inertia or load changes, causing the position of the actuator to deviate. The electromagnetic brake can immediately lock the ball nut 15 when the power is cut off or a stop signal is issued, fixing it in a specific position, effectively preventing position deviation and ensuring that the actuator always stays in a precise position.

[0026] The bottom of the aforementioned sliding sleeve 11 is connected to a limiting block 13. Through the above scheme, the limiting block 13 can clearly define the movement stroke of the ball nut 15 and the components connected thereto. During the operation of the actuator, when the sliding sleeve 11 moves to the preset limit position with the ball nut 15, the limiting block 13 contacts the fixed structure of the actuator, thereby preventing the ball nut 15 from continuing to move, ensuring that its movement range is strictly controlled within a safe and effective range, and avoiding damage to other components inside the actuator due to excessive movement.

[0027] The slide rail 7 is equipped with a grating ruler 12 on its side. Through the above scheme, the grating ruler 12 can feed back the position information of the actuator to the control system in real time, so that the control system can know the actual position of the actuator at any time. Based on this feedback, the control system can accurately adjust the motion parameters of the motor, correct the position deviation in time, and ensure that the actuator always runs according to the predetermined trajectory and position requirements, thereby improving the control accuracy and stability of the entire system.

[0028] The hollow shaft stepper motor 10, sliding sleeve 11, and limit block 13 mentioned above are all connected to the slide rail 7 via sliders. Through the above scheme, each component is constrained and guided by the slide rail 7 during the movement, and can maintain a highly consistent movement trajectory. In the production process that requires precise repetition of a certain action, it ensures that the position and posture of each operation are exactly the same, which effectively improves the production quality and consistency of the product.

[0029] The aforementioned support base 2 is fixed to the base 1 by hexagonal bolts. Through the above scheme, during the operation of the actuator, the support base 2 needs to withstand various forces from the motor, transmission components and external loads. The high-strength fastening effect of the hexagonal bolts can ensure that the support base 2 will not loosen or shift due to vibration, impact or load changes, thus ensuring the stability and reliability of the overall structure of the actuator.

[0030] Absolute encoders are installed on the outer sides of the flange 4, servo motor 8, and hollow shaft stepper motor 10. Through the above scheme, the high-speed data acquisition and processing capabilities of the absolute encoder enable the control system to respond quickly to changes in motor position and obtain its own rotation angle and position in real time and accurately. When the actuator is subjected to external interference or load changes, the control system can make rapid adjustments based on the position information fed back by the encoder and restore the actuator to normal operation in a timely manner, thereby improving the actuator's dynamic response capability and anti-interference capability.

[0031] The rotary cylinder 3, servo motor 8, hollow shaft stepper motor 10, grating ruler 12, and absolute encoder mentioned above are all electrically connected to the controller. Through the above scheme, the movement of the rotary cylinder 3, servo motor 8, and hollow shaft stepper motor 10 is uniformly coordinated. The rotary cylinder 3 is responsible for steering, while the servo motor 8 and hollow shaft stepper motor 10 control the movement and positioning of the actuators. The electrical connection allows the controller to accurately coordinate the action sequence, speed, and time of each component according to the preset program, so as to achieve efficient and accurate collaborative operation.

[0032] Working principle:

[0033] The rotary cylinder 3 is fixed above the support base 2 and connected to the bracket 6 via the flange 4. When the controller issues a command, the rotary cylinder 3 starts to work, providing rotational motion, driving the connected components to rotate, and realizing the action of the actuator in the rotational direction.

[0034] When the controller issues a command, the servo motor 8 starts working, driving the lead screw 9 to rotate via the coupling 14. The lead screw 9 cooperates with several ball nuts 15, converting the rotational motion of the ball nuts 15 into linear motion, causing the ball nuts 15 to move linearly along the lead screw 9. As the lead screw 9 rotates, driving the ball nuts 15 to move linearly, the ball nuts 15 drive the sliding sleeve 11 to move linearly along the lead screw 9, thereby realizing the actuator's movement in the linear direction. After the actuator stops moving, the electromagnetic brake can immediately lock the ball nuts 15 upon power failure or a stop signal, fixing them in a specific position.

[0035] The hollow shaft stepper motor 10 is externally mounted on the ball nut 15. Together with an advanced control system, it provides real-time compensation for errors generated during actuator operation. Due to motion deviations caused by factors such as mechanical wear and temperature changes, the stepper motor can be fine-tuned based on feedback signals, ensuring that the actuator's movement always remains within the predetermined accuracy range, effectively improving product quality and production stability.

[0036] The controller centrally manages the movement of rotary cylinder 3, servo motor 8, hollow shaft stepper motor 10, grating ruler 12, and absolute encoder. Rotary cylinder 3 is responsible for steering, while servo motor 8 and hollow shaft stepper motor 10 control the movement and positioning of the actuators. The electrical connection allows the controller to precisely coordinate the sequence, speed, and timing of the actions of each component according to a preset program, achieving efficient and accurate collaborative operation.

[0037] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A dual-axis high-precision servo electric actuator, characterized in that, include: The base (1), the support seat (2) on the base (1), the rotary cylinder (3) fixed above the support seat (2), the flange (4) connected to the rotary cylinder (3), the bracket (6) fixedly connected to the flange (4) via the fixing frame (5), the slide rail (7) fixedly connected to the bracket (6), the servo motor (8) fixed on the slide rail (7), the lead screw (9) connected to the servo motor (8) via the coupling (14), and several ball nuts (15) cooperating with the lead screw (9).

2. The dual-axis high-precision servo electric actuator according to claim 1, characterized in that, The ball nut (15) is externally fitted with a hollow shaft stepper motor (10).

3. The dual-axis high-precision servo electric actuator according to claim 2, characterized in that, The ball nut (15) has a sliding sleeve (11) welded to its bottom, and the sliding sleeve (11) is sleeved on the outside of the lead screw (9).

4. The dual-axis high-precision servo electric actuator according to claim 3, characterized in that, The bottom of the sliding sleeve (11) is connected to a limiting block (13).

5. The dual-axis high-precision servo electric actuator according to claim 2, characterized in that, The slide rail (7) is provided with a grating ruler (12) on its side.

6. The dual-axis high-precision servo electric actuator according to claim 4, characterized in that, The hollow shaft stepper motor (10), the sliding sleeve (11), and the limiting block (13) are all connected to the slide rail (7) via sliders.

7. The dual-axis high-precision servo electric actuator according to claim 1, characterized in that, The support base (2) is fixed to the base (1) by hexagonal bolts.

8. The dual-axis high-precision servo electric actuator according to claim 5, characterized in that, Absolute encoders are provided on the outer sides of the flange (4), the servo motor (8), and the hollow shaft stepper motor (10).

9. The dual-axis high-precision servo electric actuator according to claim 8, characterized in that, The rotary cylinder (3), the servo motor (8), the hollow shaft stepper motor (10), the grating ruler (12), and the absolute encoder are all electrically connected to the controller.

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