An adaptive adjustment device for a linear motor
Patent Information
- Application Number
- CN202521550002.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-24
- Publication Date
- 2026-09-18
- Estimated Expiration
- 2035-07-24
AI Technical Summary
[0004]直线电机的自适应调节装置在安装时，通常是由螺丝固定，不便使其快速拆卸维护；
[0019] This utility model uses a combination of components such as a fixed groove, fixed block, pin hole, mounting plate, positioning pin, reading head, wire, plug, socket, controller, acceleration sensor, carriage, grating ruler, and end cap to facilitate quick disassembly, maintenance, and replacement of the reading head and acceleration sensor, thereby improving the accuracy of the linear motor's movement position.
Smart Images
Figure CN224774758U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of linear motor control technology, specifically to an adaptive adjustment device for a linear motor. Background Technology
[0002] A linear motor is a transmission device that directly converts electrical energy into linear motion mechanical energy without any intermediate conversion mechanism. It can be viewed as a rotary motor cut radially and unfolded into a plane. The adaptive adjustment device of a linear motor dynamically adjusts control parameters (PID gain, feedforward compensation, friction model, etc.) by real-time monitoring of the motor's operating status (such as position, current, load force, vibration, etc.) to cope with load changes, external disturbances, and mechanical nonlinearities (such as end effects and thermal deformation), thereby maintaining high precision (±0.1μm), high responsiveness (adjustment delay <1ms), and strong robustness.
[0003] Traditional linear motor adaptive adjustment devices have the following problems:
[0004] The adaptive adjustment device of a linear motor is usually fixed with screws during installation, which makes it inconvenient to disassemble and maintain it quickly.
[0005] Secondly, it is difficult to balance dynamic jitter and static accuracy of linear motors under high-speed conditions, which reduces the accuracy of linear motor position movement. Utility Model Content
[0006] The purpose of this invention is to provide an adaptive adjustment device for a linear motor. Through the cooperation of a fixing slot, a fixing block, a pin hole, and a positioning pin, the reading head can be quickly disassembled for rapid maintenance. At the same time, the reading head, grating ruler, and acceleration sensor work together to significantly improve the accuracy of the linear motor's movement position across the entire frequency band, thereby solving the problems mentioned in the background art.
[0007] To achieve the above objectives, this utility model provides the following technical solution:
[0008] An adaptive adjustment device for a linear motor includes a linear guide base, a power worktable, and a mounting plate.
[0009] A power worktable is slidably mounted on the top center of the linear guide rail base, and the power worktable has a built-in linear motor; a mounting plate is mounted on one end of the front of the power worktable, and fixing grooves are opened at both ends of the top of the front slide of the power worktable. A pin hole is opened at the center of the top of the front slide of the power worktable. Fixing blocks are fixedly mounted on both ends of the bottom of the mounting plate, and a through hole is opened at the top center of the mounting plate. A positioning pin is set inside the through hole.
[0010] The mounting plate is equipped with adjustment components for adaptive adjustment of the linear motor;
[0011] The mounting plate has a connecting plate fixed to one end of its top back side, and a placement seat is fixed to the front side of one end of the connecting plate. An acceleration sensor is installed inside the placement seat, and the acceleration sensor is connected to an external control device via a wire.
[0012] Preferably, the adjustment assembly includes a mounting plate, a reading head, a wire, a plug, a socket, a controller, a slide, a grating ruler, and end caps. The reading head is fixedly mounted on the bottom of the mounting plate, one end of the reading head is fixedly connected to a wire, and the other end of the wire is fixedly connected to a plug. The controller is provided on the top front end of the mounting plate, and the plug is inserted into a corresponding socket provided below the controller on one side. The slide is fixedly mounted on the back of the reading head, and the slide is slidably connected to the grating ruler provided on the front center of the linear guide rail seat. End caps for limiting the position are installed at both ends of the grating ruler.
[0013] The reading head works in conjunction with the grating ruler to achieve precise positioning of the linear motor.
[0014] Preferably, the grating ruler is bonded to the center of the front side of the linear guide base, and the back side of the end cap is bonded to the front side of the linear guide base.
[0015] Preferably, the mounting plate has card holders fixedly installed at both ends of the front side of the top, and the controller is snapped into the inside of the card holders.
[0016] Preferably, the upper sides of the placement seat are provided with positioning grooves, and a positioning seat is engaged inside the positioning groove, with the bottom of the positioning seat abutting the top of the acceleration sensor.
[0017] Preferably, one end of the positioning pin through the through hole is engaged with the inside of the pin hole.
[0018] Compared with the prior art, the beneficial effects of this utility model are:
[0019] This utility model uses a combination of components such as a fixed groove, fixed block, pin hole, mounting plate, positioning pin, reading head, wire, plug, socket, controller, acceleration sensor, carriage, grating ruler, and end cap to facilitate quick disassembly, maintenance, and replacement of the reading head and acceleration sensor, thereby improving the accuracy of the linear motor's movement position.
[0020] Furthermore, the combined use of the grating ruler and the accelerometer can significantly improve the full-frequency accuracy of the linear motor's position: the grating ruler provides a stable low-frequency absolute position reference (±0.1μm static accuracy), while the accelerometer, by capturing high-frequency vibrations (200Hz-5kHz) in real time and performing dynamic compensation, reduces the dynamic tracking error caused by disturbances by more than 70% (e.g., from ±0.5μm to ±0.15μm when moving at 1m / s).
[0021] In summary, this utility model enables the quick disassembly of the reading head through the cooperation of the fixing slot, fixing block, pin hole and positioning pin, so as to facilitate quick maintenance; at the same time, the reading head, grating ruler and acceleration sensor are used in conjunction to significantly improve the full-frequency accuracy of the linear motor's movement position. Attached Figure Description
[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0023] Figure 2 This is a schematic diagram of the separation structure of the linear motor and the adjustment device of this utility model;
[0024] Figure 3 This is a schematic diagram of the explosion separation structure of the regulating device of this utility model;
[0025] Figure 4 for Figure 3 Right view structural diagram;
[0026] Figure 5 for Figure 3 Rear view structural diagram.
[0027] In the diagram: 1. Linear guide rail seat; 2. Power worktable; 3. Fixing groove; 301. Fixing block; 4. Pin hole; 5. Mounting plate; 6. Positioning pin; 7. Reading head; 701. Wire; 702. Plug; 703. Socket; 8. Controller; 9. Card slot; 10. Connecting plate; 11. Placement seat; 12. Acceleration sensor; 13. Positioning groove; 14. Positioning seat; 15. Carriage; 16. Grating ruler; 17. End cap. Detailed Implementation
[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0029] Please see Figures 1-5 This utility model provides a technical solution:
[0030] An adaptive adjustment device for a linear motor includes a linear guide rail base 1, a power worktable 2, and a mounting plate 5.
[0031] A power worktable 2 is slidably mounted on the top center of the linear guide rail base 1, and the power worktable 2 has a built-in linear motor; a mounting plate 5 is mounted on one end of the front of the power worktable 2, and fixing grooves 3 are opened at both ends of the top of the front slide of the power worktable 2. A pin hole 4 is opened at the center of the top of the front slide of the power worktable 2. Fixing blocks 301 are fixedly mounted on both ends of the bottom of the mounting plate 5, and a through hole is opened at the top center of the mounting plate 5. A positioning pin 6 is set inside the through hole; one end of the positioning pin 6 passes through the through hole and engages with the inside of the pin hole 4; the reverse operation allows the mounting plate 5 to be installed quickly.
[0032] By taking the positioning pin 6 by hand and moving it upward, the positioning pin 6 can be disengaged from the pin hole 4. Then, the mounting plate 5 can be taken and moved upward, so that the fixing block 301 set at the bottom of the mounting plate 5 can be moved out of the fixing groove 3, so as to realize the quick disassembly and separation of the mounting plate 5, thereby facilitating the inspection and maintenance of the reading head 7 and the acceleration sensor 12 on the mounting plate 5.
[0033] The mounting plate 5 is equipped with an adjustment component for adaptive adjustment of the linear motor. The adjustment component includes the mounting plate 5, a reading head 7, a wire 701, a plug 702, a socket 703, a controller 8, a slide 15, a grating ruler 16, and an end cap 17. The reading head 7 is fixedly mounted on the bottom of the mounting plate 5. One end of the reading head 7 is fixedly connected to the wire 701, and the other end of the wire 701 is fixedly connected to the plug 702. The controller 8 is located on the top front end of the mounting plate 5. The plug 702 is inserted into the corresponding socket 703 located below one side of the controller 8. The slide 15 is fixedly mounted on the back of the reading head 7. The slide 15 is slidably connected to the grating ruler 16 located at the center of the front of the linear guide rail seat 1. End caps 17 for limiting are installed at both ends of the grating ruler 16.
[0034] The reading head 7 works in conjunction with the grating ruler 16 to achieve precise positioning of the linear motor.
[0035] Among them, a connecting plate 10 is fixed to one end of the top back of the mounting plate 5, and the connecting plate 10 has anti-interference performance; a placement seat 11 is fixed to the front of one end of the connecting plate 10, and an acceleration sensor 12 is installed inside the placement seat 11. The acceleration sensor 12 is connected to an external control device through a wire 701.
[0036] An accelerometer (PCB Piezotronics 356A01) is a MEMS or piezoelectric device that converts mechanical vibrations into electrical signals. It is used to detect the high-frequency dynamic characteristics of linear motors (bandwidth up to 10kHz, sensitivity 100mV / g). By monitoring vibrations (such as structural resonance or impact disturbances) in the range of 200Hz to 5kHz in real time, it provides a basis for feedforward compensation for the control system.
[0037] This utility model uses a combination of components such as a fixed groove 3, a fixed block 301, a pin hole 4, a mounting plate 5, a positioning pin 6, a reading head 7, a wire 701, a plug 702, a socket 703, a controller 8, an acceleration sensor 12, a slide 15, a grating ruler 16, and an end cap 17 to facilitate quick disassembly, maintenance, and replacement of the reading head 7 and the acceleration sensor 12, thereby improving the accuracy of the linear motor's movement position.
[0038] Furthermore, the combined use of the grating ruler 16 and the accelerometer can significantly improve the full-frequency accuracy of the linear motor's position: the grating ruler 16 provides a stable low-frequency absolute position reference (±0.1μm static accuracy), while the accelerometer, by capturing high-frequency vibrations (200Hz-5kHz) in real time and performing dynamic compensation, reduces the dynamic tracking error caused by disturbances by more than 70% (e.g., from ±0.5μm to ±0.15μm when moving at 1m / s).
[0039] The HEIDENHAIN LIDA 487 series grating ruler 16 is a high-precision linear displacement sensor that achieves nanometer-level position detection through the optical moiré fringe principle.
[0040] The reading head 7 (RON 886C) serves as its signal acquisition unit, converting the optical signals of the grating lines into electrical signals (with a resolution of 1 nm).
[0041] The controller 8 (SIEMENS SMC30) is responsible for decoding the reading head 7 signal (supporting the EnDat2.2 protocol) and executing the closed-loop control algorithm. The three of them constitute the core chain of the linear motor positioning system, with a typical positioning accuracy of ±0.1μm.
[0042] By processing this data in real time (such as decoding the EnDat protocol and compensating for temperature drift), controller 8 can dynamically adjust the following key parameters of the linear motor:
[0043] PID gain (dynamically adjusts the proportional / integral / derivative coefficients based on the error);
[0044] Feedforward compensation (based on position differential prediction of disturbance);
[0045] Current loop output (thrust fluctuation optimized via FOC algorithm);
[0046] Vibration suppression parameters (integrating acceleration signals to suppress resonance) ultimately achieve coordinated control of positioning accuracy at the ±0.1μm level and anti-interference bandwidth at 1kHz.
[0047] In summary, this utility model enables the reading head 7 to be quickly disassembled for rapid maintenance through the cooperation of the fixing groove 3, fixing block 301, pin hole 4 and positioning pin 6. At the same time, the reading head 7, grating ruler 16 and acceleration sensor 12 work together to significantly improve the full-frequency accuracy of the linear motor's movement position.
[0048] This utility model utilizes components such as the reading head 7, the grating ruler 16, and the acceleration sensor 12 to work together to achieve precise positioning of the linear motor. At the same time, the system control bandwidth is extended from 300Hz to 1kHz, which maintains nanometer-level steady-state accuracy and reduces the impact recovery time by 80% (10ms→2ms), enabling the linear motor to achieve true dynamic and static advantages in high-speed and high-precision scenarios.
[0049] The grating ruler 16 is bonded to the center of the front side of the linear guide 1, and the back side of the end cap 17 is bonded to the front side of the linear guide 1.
[0050] The mounting plate 5 has two fixed mounting brackets 9 on its top front end. These brackets 9 are used to secure the controller 8 in place. The controller 8 is held in place inside the brackets 9.
[0051] The upper sides of the placement base 11 are provided with positioning grooves 13, and positioning seats 14 are engaged inside the positioning grooves 13. The bottom of the positioning seats 14 abuts against the top of the acceleration sensor 12. By setting the positioning grooves 13 and positioning seats 14, this utility model can easily press and fix the acceleration sensor 12, and at the same time, it can also facilitate its quick disassembly, replacement and maintenance.
[0052] By picking up the positioning seat 14 by hand and moving it upward, the positioning seat 14 can be removed from the positioning groove 13, thereby facilitating the removal and maintenance of the acceleration sensor 12 placed in the placement seat 11.
[0053] In practical use, when the power worktable 2 is working, the reading head 7 moves horizontally on the grating ruler 16 while moving across the power worktable 2. At the same time, the acceleration sensor 12 moves on the power worktable 2 following the mounting plate 5. The reading head 7, the grating ruler 16 and the acceleration sensor 12 work together under coordinated control.
[0054] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. An adaptive adjustment device for a linear motor, comprising a linear guide rail base (1), a power worktable (2), and a mounting plate (5), characterized in that: The linear guide rail base (1) has a power worktable (2) slidably mounted on its top center, and the power worktable (2) has a built-in linear motor; a mounting plate (5) is mounted on one end of the front of the power worktable (2), and fixing grooves (3) are opened at both ends of the top of the front slide of the power worktable (2), and a pin hole (4) is opened at the center of the top of the front slide of the power worktable (2); fixing blocks (301) are fixedly mounted on both ends of the bottom of the mounting plate (5), and a through hole is opened at the center of the top of the mounting plate (5), and a positioning pin (6) is set inside the through hole; The mounting plate (5) is equipped with an adjustment component for adaptive adjustment of the linear motor; Among them, a connecting plate (10) is fixed to one end of the top back of the mounting plate (5), and a placement seat (11) is fixed to the front of one end of the connecting plate (10). An acceleration sensor (12) is placed inside the placement seat (11), and the acceleration sensor (12) is connected to an external control device through a wire (701).
2. The adaptive adjustment device for a linear motor according to claim 1, characterized in that: The adjustment assembly includes a mounting plate (5), a reading head (7), a wire (701), a plug (702), a socket (703), a controller (8), a slide (15), a grating ruler (16), and an end cap (17). The reading head (7) is fixedly mounted on the bottom of the mounting plate (5). One end of the reading head (7) is fixedly connected to a wire (701), and one end of the wire (701) is fixedly connected to a plug (702). The controller (8) is provided on the top front end of the mounting plate (5). The plug (702) is inserted into a corresponding socket (703) provided below one side of the controller (8). The slide (15) is fixed on the back of the reading head (7). The slide (15) is slidably connected to the grating ruler (16) provided at the center of the front of the linear guide rail seat (1). The two ends of the grating ruler (16) are equipped with end caps (17) for limiting. The reading head (7) works in conjunction with the grating ruler (16) to achieve precise positioning of the linear motor.
3. The adaptive adjustment device for a linear motor according to claim 2, characterized in that: The grating ruler (16) is bonded to the center of the front of the linear guide seat (1), and the back of the end cap (17) is bonded to the front of the linear guide seat (1).
4. The adaptive adjustment device for a linear motor according to claim 1, characterized in that: The mounting plate (5) has a card holder (9) fixedly installed at both ends of the front side of the top, and the controller (8) is snapped into the inside of the card holder (9).
5. The adaptive adjustment device for a linear motor according to claim 1, characterized in that: The placement seat (11) has positioning grooves (13) on both sides of the upper part. The positioning seat (14) is engaged inside the positioning groove (13). The bottom of the positioning seat (14) abuts against the top of the acceleration sensor (12).
6. The adaptive adjustment device for a linear motor according to claim 1, characterized in that: The locating pin (6) is engaged with the inside of the through hole (4) at one end.