Micrometer linear drive

Abstract

The utility model provides a kind of micron linear drive device, including shell, base, reducer box shell and by shell, the internal space being enclosed by reducer box shell and base jointly, internal space is integrated with miniature motor, reducer, screw mechanism and sensor, the motion control single-chip microcomputer drive board of motor and the embedded processing circuit board of sensor signal processing;Single-chip microcomputer drive board is electrically connected with miniature motor, the input end of reducer is connected to the output end of miniature motor, screw mechanism includes screw nut and screw rod, and the output end of reducer is connected to screw rod, and screw nut connection is equipped with screw nut fixing seat, and screw nut fixing seat is connected with external shaft, and external shaft extends base;Embedded processing circuit board is electrically connected with sensor, and single-chip microcomputer drive board is electrically connected with embedded processing circuit board, and sensor is used to detect the position change of external shaft, and male plug is provided on base, and male plug is connected with single-chip microcomputer drive board.

Description

Technical Field

[0001] This utility model relates to the field of driver technology, and in particular to a micron-level linear drive device. Background Technology

[0002] With the continuous advancement of technology, the demand for high-precision linear motion is growing in many fields, such as semiconductor manufacturing, micro-nano fabrication, precision optical instruments, and biomedical engineering. In these fields, linear motion control with micron-level or even higher precision is crucial for improving production efficiency, ensuring product quality, and realizing complex functions.

[0003] Currently, linear drives are widely used in various fields. Common forms of linear drives include a motor, a lead screw and nut mechanism, and an output shaft connected in sequence. Linear drives are typically used to achieve precise linear motion. In a linear drive, the motor provides power, and the lead screw and nut mechanism transmits that power to the output shaft, enabling it to move linearly.

[0004] Existing high-precision linear drive devices are often large in size and complex in structure, making miniaturization and weight reduction difficult. In addition, the drivers and controllers of traditional devices are usually separate, requiring complex wiring and installation, which increases the complexity of the system and the risk of failure, while making it difficult to achieve micron-level or even higher precision control. Utility Model Content

[0005] To address the shortcomings of the existing technology, this utility model aims to provide a micron-level linear drive device to meet the application requirements of high precision, miniaturization, low cost, and high reliability.

[0006] To solve the above-mentioned technical problems, this utility model provides a micron-level linear drive device, including a shell, a base, a reducer housing, and an internal space formed by the shell, the reducer housing, and the base. The internal space integrates a micro motor, a reducer, a lead screw mechanism and a sensor, a single-chip microcomputer drive board for motor motion control, and an embedded processing circuit board for sensor signal processing.

[0007] The microcontroller driver board is electrically connected to the micro motor, the output end of the micro motor is connected to the input end of the reducer, the lead screw mechanism includes a lead screw nut and a lead screw, the lead screw is connected to the output end of the reducer, the lead screw nut is connected to a lead screw nut fixing seat, the lead screw nut fixing seat is connected to the external shaft, and the external shaft extends out of the base;

[0008] The embedded processing circuit board is electrically connected to the sensor, and the microcontroller driver board is electrically connected to the embedded processing circuit board. The sensor is used to detect the position change of the external shaft. A male plug is provided on the base, and the male plug is connected to the microcontroller driver board.

[0009] In a preferred embodiment, the reducer is a reduction gearbox.

[0010] In a preferred embodiment, the lead screw mechanism is a ball screw mechanism.

[0011] In a preferred embodiment, the internal space is provided with a frame, the lead screw mechanism is installed inside the frame, the reducer is installed above the frame, and the lead screw extends out of the frame and connects to the reducer.

[0012] In a preferred embodiment, guide posts are provided on both sides of the lead screw within the frame, and the lead screw nut fixing seat is provided with guide holes corresponding to the guide posts. The lead screw nut fixing seat is slidably connected to the guide posts through the guide holes.

[0013] In a preferred embodiment, the frame includes a through hole through which the lead screw passes and is connected to the reducer, the lead screw includes an angular contact bearing disposed within the through hole; the slide rail is disposed on both sides of the frame along the width direction, the through groove is provided with retaining edges on both sides along the width direction, and the angular contact bearing is disposed within the through hole.

[0014] In a preferred embodiment, a handwheel is provided on the housing, and the drive end of the handwheel is connected to the input end of the reducer; the handwheel can be rotated to drive the reducer.

[0015] In a preferred embodiment, the sensor includes a magnetic sensor and a magnetic component. The magnetic sensor is fixed on the embedded processing circuit board, the magnetic component is disposed on the lead screw nut fixing seat, the embedded processing circuit board is fixed on one side of the lead screw nut fixing seat, and the magnetic sensor is disposed above the magnetic component along the height direction.

[0016] In a preferred embodiment, the base is provided with a first mounting port and a second mounting port, the male plug is disposed in the first mounting port, and the external shaft extends out of the base from the second mounting port.

[0017] Compared with the prior art, the technical solution of this utility model has the following beneficial effects:

[0018] 1. By setting up a micro-motor and a microcontroller driver board for motor motion control, as well as an embedded processing circuit board for sensor signal processing, the sensor detects in real time, and the embedded processing circuit board compensates for the travel difference of the external shaft's mechanical movement in real time, achieving micron-level precision control. Simultaneously, a lead screw mechanism is adopted, possessing strong self-locking force. When power is off, the lead screw and lead screw nut achieve mechanical self-locking, preventing slippage under vertical load.

[0019] 2. High integration enables a compact design, with key components such as micro motors, reducers, lead screw mechanisms, motion control microcontroller driver boards for sensor motors, and embedded processing circuit boards for sensor signal processing compactly integrated within the internal space. This facilitates integration and installation, reduces maintenance costs, and further enhances its practicality and economy.

[0020] 3. By setting a reducer, ultra-high torque can be achieved. After the micro motor passes through the reducer, the output torque can be increased instantly. At the same time, the device has high power output capability and high conversion efficiency, fast movement speed, and high-precision positioning capability, which can meet the requirements of different working speeds. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure and appearance of the linear drive device in a preferred embodiment of the present invention;

[0022] Figure 2 This is a schematic diagram of the internal space integration structure of the linear drive device in a preferred embodiment of the present invention;

[0023] Figure 3 This is a schematic diagram of the base structure of the linear drive device in a preferred embodiment of the present invention;

[0024] Figure 4 This is a cross-sectional view of the internal structure of the linear drive device in a preferred embodiment of the present invention.

[0025] Figure 5 This is a diagram showing the fit between the frame and the lead screw mechanism of the linear drive device in a preferred embodiment of this utility model.

[0026] Explanation of reference numerals in the attached drawings: 1. Housing; 11. Handwheel; 2. Base; 21. First mounting port; 22. Second mounting port; 23. Male plug; 3. Micro motor; 4. Reducer; 41. Reducer housing; 5. Lead screw mechanism; 51. Lead screw nut; 52. Lead screw; 53. Lead screw nut fixing seat; 531. Guide hole; 54. Contact bearing; 6. Microcontroller driver board; 7. External shaft; 8. Frame; 81. Guide post; 82. Through hole; 9. Sensor; 91. Magnetic sensor; 92. Magnetic component; 10. Embedded processing circuit board. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0028] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0029] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed", "equipped with", "sleeved / connected", "connected", etc., should be interpreted broadly. For example, "connection" can be a wall-mounted connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0030] refer to Figures 1-5This embodiment provides a micron-level linear drive device, including a housing 1, a base 2, a reducer housing 41, and an internal space enclosed by the housing 1, the reducer housing 41, and the base 2. The internal space integrates a micro motor 3, a reducer 4, a lead screw mechanism 5, a sensor 9, a microcontroller drive board 6 for motor motion control, and an embedded processing circuit board 10 for sensor 9 signal processing. The microcontroller drive board 6 is electrically connected to the micro motor 3, providing control signals to achieve precise control of the micro motor 3. The output end of the micro motor 3 is connected to the input end of the reducer 4. The lead screw mechanism 5 includes a lead screw nut 51 and a lead screw 52. The lead screw 52 is connected to the output end of the reducer 4. The input and output ends of the reducer 4 are designed on opposite sides, so that the shaft of the lead screw 52 and the output shaft of the motor are parallel inside the electric cylinder. The lead screw nut 51 is connected to a lead screw nut 51 fixing seat, which is connected to the external shaft 7, which extends out of the base 2. The embedded processing circuit board 10 is electrically connected to the sensor 9, and the microcontroller driver board 6 is electrically connected to the embedded processing circuit board 10. The sensor 9 is used to detect the position change of the external shaft 7. The base 2 is provided with a male plug 23, which is connected to the microcontroller driver board 6.

[0031] In this embodiment, the micron-level linear drive device has the following advantages: high torque; the torque of the micro motor 3 is amplified by the reducer 4 and then drives the lead screw 52, ​​resulting in a significant increase in output thrust. Micron-level positioning; the lead screw 52-nut directly converts the motor's rotational motion into linear motion, and with the closed-loop control of the high-precision sensor 9, micron-level positioning is achieved. In the event of a power outage, the lead screw 52-nut and the reducer work together to increase the self-locking force and prevent the load from retracting. Compact design; all components are arranged within a single internal space enclosed by the outer shell 1 and the base 2, with no external structure.

[0032] The reducer 4 provided in this embodiment is a reduction gearbox. The input end of the reduction gearbox is connected to the output end of the micro motor 3, receiving the power input from the micro motor 3. The output end of the reduction gearbox is connected to the lead screw mechanism 5, transmitting the reduced power to the lead screw mechanism 5, driving the lead screw 52 to rotate, thereby driving the external shaft 7 to achieve linear motion. Using a reduction gearbox as the reducer 4 can effectively reduce the speed of the micro motor 3, increase the output torque, improve the push-pull force of the drive device, and achieve linear drive with micron-level precision.

[0033] The lead screw mechanism 5 provided in this embodiment is a ball screw mechanism 5. The lead screw 52 is connected to the reducer 4 and receives the power transmitted by the reducer 4. The rotation of the lead screw 52 realizes the conversion of linear motion. The lead screw nut 51 cooperates with the lead screw 52. The fixed seat of the lead screw nut 51 is connected to the external shaft 7. When the lead screw 52 rotates, the lead screw nut 51 moves along the axial direction of the lead screw 52, ​​driving the external shaft 7 to achieve linear motion. The ball screw 52 has low friction and high efficiency, and outputs greater thrust for the same volume. The ball circulation structure itself has high rigidity, increases the self-locking torque, and achieves backlash-free, micron-level repeatable positioning.

[0034] The specific assembly structure of the lead screw mechanism 5 is as follows: Figure 2 The internal space is equipped with a frame 8. The lead screw mechanism 5 is installed inside the frame 8, and the reducer 4 is installed above the frame 8. The lead screw 52 extends out of the frame 8 and connects to the reducer 4. The frame 8 supports the lead screw mechanism 5, and the reducer 4 is installed above the frame 8, with the lead screw 52 extending out of the frame 8 and connecting to the reducer 4, thus realizing the transmission and conversion of power. The frame 8 provides a stable mounting platform for the lead screw mechanism 5 and the reducer 4, ensuring precise cooperation and stable operation between components, and improving the reliability and accuracy of the drive device.

[0035] like Figure 5 Within the frame 8, guide posts 81 are provided on both sides of the lead screw 52. The lead screw nut 51 fixing seat has guide holes 531 corresponding to the guide posts 81. The lead screw nut 51 fixing seat slides onto the guide posts 81 through the guide holes 531. The guide posts 81 guide the lead screw nut 51 fixing seat, restricting its movement direction and ensuring it moves in a straight line. The guide posts 81 and guide holes 531 provide stable motion guidance for the lead screw nut 51 fixing seat, ensuring it moves in a straight line, improving motion accuracy and stability, and reducing errors during movement.

[0036] In this embodiment, as Figure 5 The frame 8 includes a through hole 82 through which the lead screw 52 passes and connects to the reducer 4. The lead screw 52 includes an angular contact bearing 54 disposed within the through hole 82. The lead screw 52 passes through the angular contact bearing 54 and connects to the reducer 4. The angular contact bearing 54 supports and positions the lead screw 52, ​​ensuring precise connection and stable transmission between the lead screw 52 and the reducer 4. The angular contact bearing 54 can withstand larger axial and radial loads, improving the stability and reliability of the connection between the lead screw 52 and the reducer 4, extending its service life, while reducing motion resistance and improving transmission efficiency.

[0037] In this embodiment, as Figure 1A handwheel 11 is provided on the outer casing 1. The drive end of the handwheel 11 is connected to the input end of the reducer 4. Specifically, the handwheel 11 shaft passes through the top of the outer casing 1 and is connected to the high-speed gear shaft of the reducer 4 via a spline or D-shaped flat section. The handwheel 11 can be rotated to drive the reducer 4. In normal electric mode, the handwheel 11 rotates with the motor. During power outages or debugging, the lead screw 52 can be manually driven by the handwheel 11 to achieve micron-level fine adjustment without electricity. The handwheel 11 and the motor share the reducer 4, resulting in structural reuse without increasing volume. The large reduction ratio makes the handwheel 11 easy to operate and it has a reverse self-locking feature to prevent the load from causing the handwheel 11 to reverse.

[0038] The sensor 9 provided in this embodiment includes a magnetic sensor 91 and a magnetic component 92 (such as...). Figure 4 The magnetic sensor 91 is fixed on the embedded processing circuit board 10, and the magnetic component 92 is disposed on the lead screw nut 51 fixing seat. The embedded processing circuit board 10 is fixed on one side of the lead screw nut 51 fixing seat, and the magnetic sensor 91 is positioned above the magnetic component 92 along the height direction. When the lead screw nut 51 fixing seat moves, the magnetic sensor 91 detects the position change of the magnetic component 92, thereby obtaining the motion information of the lead screw nut 51 fixing seat. The magnetic component 92 moves synchronously with the lead screw nut 51 fixing seat, outputting a linear Hall voltage. The embedded processing circuit board 10 calculates the micron-level displacement in real time. By using the magnetic sensor 91 and the magnetic component 92, non-contact detection can be achieved, which has the advantages of high precision, high reliability, and strong anti-interference ability, further improving the performance and accuracy of the drive device.

[0039] In this embodiment, as Figure 3 The base 2 is provided with a first mounting port 21 and a second mounting port 22. The male plug 23 is disposed in the first mounting port 21 for easy connection and power supply, enabling signal transmission and control. The external shaft 7 extends out of the base 2 through the second mounting port 22, realizing the linear motion output of the external shaft 7 and meeting the application requirements of the drive device. The first mounting port 21 and the second mounting port 22 on the base 2 facilitate the installation and arrangement of the male plug 23 and the external shaft 7, making the structure of the entire device more reasonable. The whole machine can be "plug and play," facilitating integration and installation, and improving the versatility and operability of the device.

[0040] The above description is only a preferred embodiment of the present utility model, but the design concept of the present utility model is not limited thereto. Any non-substantial modifications made to the present utility model by those skilled in the art within the scope of the technology disclosed in the present utility model using this concept shall be deemed as an infringement of the protection scope of the present utility model.

Claims

1. A micrometer-scale linear drive device, characterized in that: It includes an outer shell, a base, a reducer housing, and an internal space enclosed by the outer shell, the reducer housing, and the base. The internal space integrates a micro motor, a reducer, a lead screw mechanism, a sensor, a single-chip microcomputer driver board for motor motion control, and an embedded processing circuit board for sensor signal processing. The microcontroller driver board is electrically connected to the micro motor, the output end of the micro motor is connected to the input end of the reducer, the lead screw mechanism includes a lead screw nut and a lead screw, the lead screw is connected to the output end of the reducer, the lead screw nut is connected to a lead screw nut fixing seat, the lead screw nut fixing seat is connected to an external shaft, and the external shaft extends out of the base; The embedded processing circuit board is electrically connected to the sensor, and the microcontroller driver board is electrically connected to the embedded processing circuit board. The sensor is used to detect the position change of the external shaft. A male plug is provided on the base, and the male plug is connected to the microcontroller driver board.

2. The micrometer linear drive according to claim 1, characterized in that The reducer is a reduction gearbox.

3. The micrometer linear drive device according to claim 1, characterized in that: The lead screw mechanism is a ball screw mechanism.

4. A micrometer-scale linear actuator according to claim 3, wherein: The internal space is equipped with a frame, the lead screw mechanism is installed inside the frame, the reducer is installed above the frame, and the lead screw extends out of the frame and connects to the reducer.

5. The micron-level linear drive device according to claim 4, characterized in that: Guide posts are provided on both sides of the lead screw inside the frame, and the lead screw nut fixing seat is provided with guide holes corresponding to the guide posts. The lead screw nut fixing seat is slidably connected to the guide posts through the guide holes.

6. A micrometer-scale linear actuator according to claim 5, wherein: The frame includes a through hole through which the lead screw passes and is connected to the reducer, the lead screw including an angular contact bearing disposed within the through hole.

7. The micrometer linear drive according to claim 1, characterized in that A handwheel is provided on the housing, and the drive end of the handwheel is connected to the input end of the reducer; the handwheel can be rotated to drive the reducer.

8. The micrometer linear drive according to claim 1, characterized in that The sensor includes a magnetic sensor and a magnetic component. The magnetic sensor is fixed on the embedded processing circuit board, and the magnetic component is disposed on the lead screw nut fixing seat. The embedded processing circuit board is fixed on one side of the lead screw nut fixing seat, and the magnetic sensor is disposed above the magnetic component along the height direction.

9. The micrometer linear drive according to claim 1, characterized in that The base is provided with a first mounting port and a second mounting port. The male plug is disposed in the first mounting port, and the external shaft extends out of the base from the second mounting port.

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