Galvanometer motor with constant temperature control function

Abstract

The galvanometer motor with the constant-temperature control function comprises a motor body assembly and a constant-temperature control assembly, the motor body assembly comprises a motor shell, a motor stator and a motor rotating shaft which are sequentially arranged from outside to inside, and the constant-temperature control assembly comprises a temperature sensor, a middle-section thermostat, a tail-section thermostat and a constant-temperature shell. The middle-section thermostat and the tail-section thermostat are vertically installed on the outer wall of the motor shell, the constant-temperature shell is arranged outside the middle-section thermostat and the tail-section thermostat, and the temperature sensor detects the temperature of the motor body assembly and feeds back the temperature to the middle-section thermostat and the tail-section thermostat. And the temperature of the motor body assembly is controlled through the middle-section thermostat and the tail-section thermostat. According to the invention, through effective temperature control, the temperature drift of the motor body assembly is reduced, and the starting and operation performance of the motor body assembly under the condition that the environment temperature is relatively low can be ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of galvanometer motors, and in particular to a galvanometer motor with a constant temperature control function. Background Art

[0002] With the rapid development of laser processing technology, laser galvanometer systems have been widely used in material processing, additive manufacturing and other fields. As the core component of the laser galvanometer system, the performance of the galvanometer motor directly affects the accuracy and efficiency of laser processing. As a high-precision instrument, the galvanometer motor has the problem of temperature drift during operation. The change in the ambient temperature of the galvanometer motor will directly affect its internal temperature, causing the motor parameters to drift. Uneven temperatures inside and outside the motor will cause local temperature differences, causing parameter drift. The performance of the galvanometer motor often degrades due to temperature drift, which affects the stability of the system and the quality of laser processing.

[0003] At present, the temperature control of the galvanometer motor is mainly carried out through heat dissipation cooling, relying on air cooling or water cooling. Although it can solve the heat dissipation problem to a certain extent, these methods have the following shortcomings: the heat dissipation efficiency of air cooling is limited and cannot meet the heat dissipation requirements of high-power galvanometer motors; although the water cooling system has high heat dissipation efficiency, it has a complex structure and high maintenance cost. The existing temperature control method cannot accurately control the temperature of the galvanometer motor, which easily leads to large fluctuations in the motor temperature, thereby affecting the processing accuracy. In order to achieve better heat dissipation effect, traditional heat dissipation systems often require a larger volume and installation space, which is not conducive to the miniaturization and integration of the system.

[0004] In addition, the start-up and operation of the galvanometer motor in a low temperature environment also face challenges. When the ambient temperature is low, the start-up and operation performance of the galvanometer motor will be affected, resulting in a decrease in the response speed and processing accuracy of the system. Therefore, it is necessary to design a galvanometer motor with a constant temperature control function to solve the above problems. Summary of the invention

[0005] The object of the present invention is to provide a galvanometer motor with a constant temperature control function.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] A galvanometer motor with a constant temperature control function comprises a motor body component and a constant temperature control component, wherein the motor body component comprises a motor housing, a motor stator and a motor shaft which are sequentially arranged from the outside to the inside, and the constant temperature control component comprises a temperature sensor, a middle section thermostat, a tail section thermostat and a constant temperature housing, wherein the middle section thermostat and the tail section thermostat are mounted on the outer wall of the motor housing from top to bottom, and the constant temperature housing is arranged outside the middle section thermostat and the tail section thermostat, and the temperature sensor detects the temperature of the motor body component and feeds back to the middle section thermostat and the tail section thermostat, and the temperature of the motor body component is controlled respectively by the middle section thermostat and the tail section thermostat.

[0008] Furthermore, the motor body assembly also includes an upper bearing, a lower bearing, an upper end cover and a lens base. The motor housing is provided with an upper flange deep groove and a lower flange deep groove at the top and bottom respectively. The upper bearing is installed in the upper flange deep groove, and the lower bearing is installed in the lower flange deep groove. The two ends of the motor bearing are respectively rotatably installed with the upper bearing and the lower bearing. The upper end cover is provided on the upper bearing and installed with the motor shaft. The lens base is provided at the top end of the motor shaft and is installed with a lens.

[0009] Furthermore, it also includes a sensor assembly, which includes a grating code disk, a reading head mounting seat, and a grating reading head. The grating code disk is installed at the bottom of the motor shaft and is driven to rotate by the motor shaft. The reading head mounting seat is arranged at the bottom of the motor housing. The grating reading head is installed on the reading head mounting seat and is placed at the bottom of the grating code disk to cooperate with it to measure the position and speed of the motor shaft.

[0010] Furthermore, the motor shaft is provided with a groove at the top, and the upper end cover is provided with a stop pin, and the stop pin is inserted into the groove to limit the position.

[0011] Furthermore, the motor body assembly also includes a lower end cover, which is installed on the bottom of the motor housing through the lower end cover, and the reading head is placed on a mounting base between the two for fixation.

[0012] Furthermore, the temperature sensor is arranged on the grating code disk.

[0013] Furthermore, the motor stator comprises a frame and a coil, the frame is provided with a plurality of coils and is arranged around the inner wall of the motor housing, and the coil is mounted on the frame.

[0014] Furthermore, the middle section thermostat includes a middle section flexible cooler and a middle section heat-conducting film, and the middle section flexible cooler and the middle section heat-conducting film are installed in sequence from the inside to the outside between the motor housing and the constant temperature housing; the tail section thermostat includes a tail section flexible cooler and a tail section heat-conducting film, and the tail section flexible cooler and the tail section heat-conducting film are installed in sequence from the inside to the outside between the motor housing and the constant temperature housing.

[0015] Furthermore, the middle section flexible cooler and the rear section flexible cooler are both flexible TEC coolers, and the middle section heat conductive film and the rear section heat conductive film are both graphene heat conductive films.

[0016] Furthermore, the constant temperature control component also includes a controller, through which the temperature collected by the temperature sensor is connected and obtained, and then the middle thermostat and the tail thermostat are connected to control the temperature.

[0017] After adopting the above technical solution, the present invention has the following advantages compared with the background technology:

[0018] 1. The present invention is provided with a middle section thermostat and a tail section thermostat, which are installed on the outside of the motor body assembly from top to bottom. Through integrated design, the impact on the overall structure and size of the motor is minimized to the greatest extent, which is more conducive to the equipment integration of the motor. The middle section thermostat and the tail section thermostat are started by the controller. Through effective temperature control, the temperature drift of the motor body assembly is reduced, and the starting and operating performance of the galvanometer motor can be ensured under low ambient temperature conditions, thereby improving the response speed and processing accuracy of the system.

[0019] 2. The present invention arranges the thermostatic housing, graphene thermal conductive film and flexible TEC cooler on the outside of the motor body assembly, which facilitates the repair or aging replacement of abnormal parts of the thermostatic device. The replacement can be completed without opening the inside of the motor and does not affect the structure and performance of the motor itself. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a structural diagram of the galvanometer motor of the present invention;

[0021] Figure 2 for Figure 1 Exploded diagram of

[0022] Figure 3 It is a schematic diagram of the stator structure of the galvanometer motor of the present invention;

[0023] Figure 4 It is a schematic diagram of the stator and housing structure of the galvanometer motor of the present invention;

[0024] Figure 5 An exploded view of the rotor structure of the galvanometer motor of the present invention;

[0025] Figure 6 It is a top view of the mechanical limiting device of the present invention;

[0026] Figure 7 It is a side view of the mechanical limiting device of the present invention;

[0027] Figure 8 is a cross-sectional schematic diagram of a galvanometer motor of the present invention;

[0028] Fig. 9 It is a working schematic diagram of the constant temperature control of the present invention.

[0029] Description of reference numerals:

[0030] 1. Motor body assembly; 2. Lens base; 3. Upper end cover; 4. Upper bearing; 5. Lower bearing; 6. Motor shaft; 7. Motor stator; 8. Motor housing; 9. Middle section flexible cooler 9; 10. Middle section thermal conductive film; 11. Tail section flexible cooler; 12. Tail section thermal conductive film; 13. Grating code disk; 14. Temperature sensor; 15. Reading head mounting seat; 16. Grating reading head; 17. Lower end cover; 18. Constant temperature housing; 19. Coil; 20. Frame; 21. Stop pin; 22. Middle section thermostat; 23. Tail section thermostat. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0032] It should be noted that in the present invention, the terms "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element of the present invention must have a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0033] Example

[0034] Cooperate Figures 1 to 9 As shown, the present invention discloses a galvanometer motor with a constant temperature control function, including a motor body component 1, a sensor component and a constant temperature control component.

[0035] The motor body component 1 includes a motor housing 8, a motor stator 7 and a motor shaft 6 which are arranged in sequence from the outside to the inside. The constant temperature control component includes a temperature sensor 14, a middle section thermostat 22, a tail section thermostat 23 and a constant temperature housing 18. The middle section thermostat 22 and the tail section thermostat 23 are installed on the outer wall of the motor housing from top to bottom. The constant temperature housing 18 is arranged outside the middle section thermostat 22 and the tail section thermostat 23. The temperature sensor 14 detects the temperature of the motor body component 1 and feeds back to the middle section thermostat 22 and the tail section thermostat 23. The temperature of the motor body component 1 is controlled by the middle section thermostat 22 and the tail section thermostat 23 respectively.

[0036] In this embodiment, a middle section thermostat 22 and a tail section thermostat 23 are provided, and the two are installed up and down on the outside of the motor body assembly 1. Through the integrated design, the impact on the overall structure and external dimensions of the motor is minimized to the greatest extent, which is more conducive to the equipment integration of the motor. The middle section thermostat 22 and the tail section thermostat 23 are started by the controller. Through effective temperature control, the temperature drift of the motor body assembly 1 is reduced, and the starting and operating performance of the galvanometer motor can be ensured under low ambient temperature conditions, thereby improving the response speed and processing accuracy of the system.

[0037] The motor body assembly 1 also includes an upper bearing 4, a lower bearing 5, an upper end cover 3 and a lens base 2. The motor housing 8 is provided with an upper flange deep groove and a lower flange deep groove at the top and bottom respectively. The upper bearing 4 is installed in the upper flange deep groove, and the lower bearing 5 is installed in the lower flange deep groove. The two ends of the motor bearing are rotatably installed with the upper bearing 4 and the lower bearing 5 respectively. The upper end cover 3 is covered on the upper bearing 4 and installed with the motor shaft 6. The lens base 2 is arranged at the top of the motor shaft 6 and is installed with a lens.

[0038] The sensor assembly includes a grating code disk 13, a reading head mounting seat 15, and a grating reading head 16. The grating code disk 13 is mounted at the bottom of the motor shaft 6 and is driven to rotate by the motor shaft 6. The reading head mounting seat 15 is set at the bottom of the motor housing 8. The grating reading head 16 is mounted on the reading head mounting seat 15 and is placed at the bottom of the grating code disk 13 to cooperate with it to measure the position and speed of the motor shaft 6.

[0039] The grating code disk 13 of the present embodiment is made of glass material, which has extremely high thermal stability and low thermal expansion coefficient. The grating lines on the code disk are evenly distributed. The grating reading head 16 contains an LED light source and a reflected light receiver. The LED light source emits light onto the grating lines of the grating code disk 13 to cause interference, and then reflects light to the receiver. By processing the signal, accurate position information of the motor shaft 6 is obtained.

[0040] The motor shaft 6 is provided with a groove at the top, and the upper end cover 3 is provided with a stop pin 21, which is inserted into the groove to limit the position. In this embodiment, the shaft is provided with a groove for limiting the rotation range of the motor, preferably two and symmetrically arranged, and the upper end cover 33 is provided with two corresponding stop pins 21. The rotation of the motor shaft 6 working through the galvanometer is provided with a physical limit device to ensure the safe operation of the galvanometer motor.

[0041] The motor body assembly 1 further comprises a lower end cover 17, which is mounted on the bottom of the motor housing 8, and the reading head is fixed on a mounting seat between the two.

[0042] The temperature sensor 14 is arranged on the grating code disk 13 .

[0043] The motor stator 7 includes a frame 20 and a coil 19. The frame 20 is provided with a plurality of coils and is arranged around the inner wall of the motor housing 8. The coil 19 is installed on the frame 20. The frame 20 of this embodiment is made of non-magnetic material, the coil 19 is wound around the outer periphery of the frame 20, and then the frame 20 and the coil 19 are encapsulated and fixed in the motor housing 8. The motor housing 8 is made of magnetic conductive material and is a magnetic conductive housing, and its yoke function.

[0044] The middle section thermostat 22 includes a middle section flexible cooler 9 and a middle section heat-conducting film, and the middle section flexible cooler 9 and the middle section heat-conducting film 10 are installed in sequence from the inside to the outside between the motor housing 8 and the constant temperature housing 18; the tail section thermostat 23 includes a tail section flexible cooler 11 and a tail section heat-conducting film 12, and the tail section flexible cooler 11 and the tail section heat-conducting film 12 are installed in sequence from the inside to the outside between the motor housing 8 and the constant temperature housing 18.

[0045] The middle section flexible cooler 9 and the tail section flexible cooler 11 are both flexible TEC coolers, and the middle section heat conductive film 10 and the tail section heat conductive film 12 are both graphene heat conductive films. The thermostatic housing 18, the graphene heat conductive film and the flexible TEC cooler are arranged outside the motor body assembly 1, so that the abnormal parts of the thermostatic device can be repaired or replaced due to aging, etc., and the replacement can be completed without opening the inside of the motor and affecting the structure and performance of the motor itself.

[0046] The thermostatic housing 18 of this embodiment is made of aluminum alloy, and the flexible TEC cooler is composed of a flexible substrate and a flexible thermoelectric material. The flexible TEC cooler uses PDMS as a flexible substrate and embeds the thermoelectric material Bi2Te3 therein. PDMS is not only flexible, but also provides good mechanical properties and electrical insulation properties. Based on the Peltier effect, the cooling and heating functions can be achieved through the positive and negative directions of the current. The flexible TEC cooler is close to the surface of the motor, and the Peltier effect can be used as a heat source or a cold source to heat or cool the motor as a whole for constant temperature control.

[0047] The constant temperature control component also includes a controller, which is an integrated chip. The controller is connected to and obtains the temperature collected by the temperature sensor 14, and then connects to the middle section thermostat 22 and the tail section thermostat 23 for temperature control. The integrated chip controls the activation of the flexible TEC cooler, and the constant temperature control is integrated with the motor to minimize the impact on the overall structure and external dimensions of the motor, which is more conducive to the assembly and installation of the motor.

[0048] The controller of this embodiment, that is, the integrated chip can also be provided with a control module and a detection module. When the flexible TEC cooler works abnormally, it can be comprehensively judged whether the flexible TEC cooler is abnormal through the information feedback of the temperature sensor 14 and the current detection information of the flexible TEC cooler, without affecting the safety performance of the galvanometer motor.

[0049] For abnormal repair of the flexible TEC cooler and the graphene thermal conductive film, the replacement work can be completed by simply opening the thermostat housing and replacing the corresponding flexible TEC cooler and the graphene thermal conductive film, which is easy to operate. For the replacement of the temperature sensor 14, the replacement work can be completed by simply opening the lower end cover 17 and the reading head mounting seat 15.

[0050] This embodiment can control the corresponding middle section thermostat 22 and the tail section thermostat 23 according to the demand of temperature change, and can also start the operation of the two thermostats at the same time.

[0051] The working principle is as follows: the working temperature of the motor body component 1 is set by initial adjustment, and the information of the temperature sensor 14 is collected through the integrated chip as a controller, so as to control the start of the corresponding flexible TEC cooler when constant temperature is required, and use the corresponding graphene thermal conductive film to exchange heat between the flexible TEC cooler and the environment.

[0052] When the motor temperature is lower than the set working temperature, the flexible TEC cooler starts to heat up by being close to the working surface of the motor, and performs heat exchange with the environment by being close to the non-working surface of the graphene thermal conductive film, so that the motor gradually reaches the set working temperature and stops heating. When the motor temperature is higher than the set working temperature, the flexible TEC cooler cools the motor to dissipate heat and gradually reaches the set working temperature and stops cooling. Then, the graphene thermal conductive film is used to dissipate the heat generated by the non-working surface of the flexible TEC cooler through environmental heat exchange, so that the motor can be controlled at a constant temperature. This embodiment reduces the impact of the environment on the galvanometer motor, reduces the temperature drift of the galvanometer motor through effective temperature control, and ensures the startup and operation performance of the galvanometer motor under low ambient temperature.

[0053] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A galvanometer motor with a constant temperature control function, characterized in that: It includes a motor body component and a constant temperature control component. The motor body component includes a motor housing, a motor stator and a motor shaft arranged in sequence from the outside to the inside. The constant temperature control component includes a temperature sensor, a middle section thermostat, a tail section thermostat and a constant temperature housing. The middle section thermostat and the tail section thermostat are installed up and down on the outer wall of the motor housing. The constant temperature housing is arranged outside the middle section thermostat and the tail section thermostat. The temperature sensor detects the temperature of the motor body component and feeds back to the middle section thermostat and the tail section thermostat. The temperature of the motor body component is controlled by the middle section thermostat and the tail section thermostat respectively.

2. The galvanometer motor with constant temperature control function as claimed in claim 1, characterized in that: The motor body assembly also includes an upper bearing, a lower bearing, an upper end cover and a lens base. The motor housing is provided with an upper flange deep groove and a lower flange deep groove at the top and bottom respectively. The upper bearing is installed in the upper flange deep groove, and the lower bearing is installed in the lower flange deep groove. The two ends of the motor bearing are respectively rotatably installed with the upper bearing and the lower bearing. The upper end cover is provided on the upper bearing and installed with the motor shaft. The lens base is provided at the top end of the motor shaft and is installed with a lens.

3. The galvanometer motor with constant temperature control function as claimed in claim 2, characterized in that: It also includes a sensor assembly, which includes a grating code disk, a reading head mounting seat, and a grating reading head. The grating code disk is mounted on the bottom of the motor shaft and is driven to rotate by the motor shaft. The reading head mounting seat is arranged at the bottom of the motor housing. The grating reading head is mounted on the reading head mounting seat and is placed at the bottom of the grating code disk to cooperate with the grating code disk to measure the position and speed of the motor shaft.

4. The galvanometer motor with constant temperature control function as claimed in claim 2, characterized in that: The motor shaft is provided with a groove at the top, and the upper end cover is provided with a stop pin, which is inserted into the groove to limit the position.

5. The galvanometer motor with constant temperature control function as claimed in claim 3, characterized in that: The motor body assembly also includes a lower end cover, which is installed at the bottom of the motor housing through the lower end cover, and the reading head is placed in a mounting seat between the two for fixation.

6. The galvanometer motor with constant temperature control function as claimed in claim 3, characterized in that: The temperature sensor is arranged on the grating code disk.

7. The galvanometer motor with constant temperature control function as claimed in claim 1, characterized in that: The motor stator comprises a frame and a coil. The frame is provided with a plurality of coils and is arranged around the inner wall of the motor housing. The coil is installed on the frame.

8. The galvanometer motor with constant temperature control function as claimed in claim 1, characterized in that: The middle section thermostat includes a middle section flexible cooler and a middle section heat-conducting film, and the middle section flexible cooler and the middle section heat-conducting film are installed in sequence from the inside to the outside between the motor housing and the constant temperature housing; the tail section thermostat includes a tail section flexible cooler and a tail section heat-conducting film, and the tail section flexible cooler and the tail section heat-conducting film are installed in sequence from the inside to the outside between the motor housing and the constant temperature housing.

9. The galvanometer motor with constant temperature control function as claimed in claim 8, characterized in that: The middle section flexible cooler and the rear section flexible cooler are both flexible TEC coolers, and the middle section heat conductive film and the rear section heat conductive film are both graphene heat conductive films.

10. A galvanometer motor with a constant temperature control function as claimed in any one of claims 1 to 9, characterized in that: The constant temperature control component also includes a controller, which is connected to and obtains the temperature collected by the temperature sensor, and then connects to the middle thermostat and the tail thermostat to control the temperature.

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