Low-temperature electric actuator
By introducing an insulated chamber and protective frame into the electric actuator, combined with a linkage mechanism and an automated cleaning system, the problems of freezing damage, poor heat dissipation adaptability, and high maintenance difficulty of traditional electric actuators in low-temperature environments are solved, achieving stable operation and efficient maintenance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-01-07
- Publication Date
- 2026-03-13
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
Traditional electric actuators are prone to freezing damage to components and failure of parts in low-temperature environments. Their heat dissipation structure is fixed and has poor adaptability. At the same time, maintenance depends on manual labor, is difficult to operate, and poses safety risks and high maintenance costs.
The design of the insulated chamber and protective frame provides thermal insulation and protection for the core transmission components; the bevel gear meshing transmission between the linkage mechanism and the transmission mechanism enables precise temperature control and flexible heat dissipation in low-temperature environments; the automated cleaning system inside the control box reduces the need for manual maintenance.
It achieves stable operation in low-temperature environments, improves heat dissipation adaptability, reduces maintenance difficulty and cost, and enhances equipment efficiency and safety.
Smart Images
Figure CN121654785A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of electric actuator technology, and more particularly to a cryogenic electric actuator. Background Technology
[0002] In the field of industrial automation, electric actuators, as core components for controlling valves, baffles and other equipment, are widely used in various scenarios such as petrochemicals, cold chain logistics, and polar engineering. Among these, the demand for stable operation in low-temperature environments is becoming increasingly prominent.
[0003] Traditional electric actuators have not fully considered the special characteristics of low-temperature operating conditions in their structural design, resulting in many problems that urgently need to be solved. Their core transmission components and electronic components lack targeted thermal insulation and protection structures. In low-temperature environments, they are prone to transmission jamming due to material embrittlement and lubricant solidification, and even component freezing failure, which seriously affects the stability of equipment operation. Furthermore, their heat dissipation systems are mostly fixed structures, which cannot flexibly adjust the heat dissipation efficiency according to the actual temperature changes in low-temperature environments. Either the heat dissipation is not timely enough when the temperature is slightly higher, resulting in overheating of components, or excessive heat dissipation at extreme low temperatures, resulting in energy waste. Their adaptability is extremely poor. In addition, in low-temperature environments, the surface of the heat dissipation structure is prone to condensation of frost and accumulation of dust. Traditional equipment requires manual cleaning and maintenance regularly, which is not only difficult to operate and labor-intensive, but also poses safety risks for low-temperature operations. At the same time, the overall disassembly and assembly of the equipment is inconvenient, which further increases maintenance costs and downtime.
[0004] Therefore, we propose a cryogenic electric actuator. Summary of the Invention
[0005] To address the problems of traditional electric actuators being prone to component freezing damage and failure in low-temperature environments, having fixed heat dissipation structures with poor adaptability, and requiring manual maintenance and being difficult to operate, this invention adopts the following technical solution: A cryogenic electric actuator includes a reversing gearbox, a drive housing, and a control box. The control box, drive housing, and reversing gearbox are connected sequentially from left to right. A main shaft is rotatably provided at the bottom of the reversing gearbox. An installation end for connecting the drive housing is integrally formed on the side of the reversing gearbox. An insulation chamber is provided inside the drive housing. The drive housing has a protective frame to protect the internal rotor. The drive housing has staggered through-holes. The drive housing has a heat transfer cavity. The outer surface of the drive housing has mounting holes. A heat dissipation fin assembly is movably fitted inside the through-holes. The heat dissipation fin assembly includes a main fin that is movably fitted with the through-hole. The outer end of the main fin has a sealing plate. The outer surface of the sealing plate has a secondary fin. A flow channel is formed at one inner end of the main fin.
[0006] Preferably, a transmission mechanism is rotatably provided inside the heat transfer cavity. The transmission mechanism includes a transmission screw shaft and a rotating shaft that are rotatably connected to the heat transfer cavity. The end of the transmission screw shaft is provided with a driven bevel gear, and the end of the rotating shaft is provided with a driving bevel gear that meshes with the driven bevel gear.
[0007] Preferably, a linkage mechanism is fixedly installed on the outer surface of the drive housing. The linkage mechanism includes a linkage shaft compartment disposed on the outer surface of the drive housing. Both ends of the linkage shaft compartment are provided with gear ring boxes that are connected to the rotating shafts at both ends of the drive housing. The end of the linkage shaft compartment is provided with a first adjusting motor that drives the internal transmission shaft.
[0008] Preferably, the left end of the drive housing is provided with a rear end head that is connected to the control box, the right end of the drive housing is provided with a front end head that is connected to the mounting end head, and a heat transfer ring plate is provided on the outer side of the rear end head.
[0009] Preferably, the main fin is provided with a linkage frame and a linkage sleeve at its left and right ends respectively, and the linkage frame is provided with a linkage rod that is movably fitted with the linkage sleeve at both ends. The linkage frame is threadedly fitted with the transmission screw shaft.
[0010] Preferably, the control box contains a component box, the outer end of the component box is provided with an operating cover, and the bottom of the inner cavity of the component box is provided with a mounting bracket for installing components.
[0011] Preferably, a heat dissipation rib is fixedly installed on the outer surface of the control box, and a scraper frame acting on the outer surface of the heat dissipation rib is movably fitted on the outer surface of the control box.
[0012] Preferably, the control box has adjusting screws that are rotatably mounted on the left and right ends of its outer surface, and a first spur gear is fixedly installed at the top of the adjusting screws.
[0013] Preferably, a second adjusting motor is fixedly installed on the top of the inner wall of the control box, and a second spur gear is fixedly installed on the top of the output shaft of the second adjusting motor.
[0014] Preferably, the upper part of the side wall of the control box is rotatably fitted with inner and outer double toothed rings, the inner ring teeth and outer ring teeth of the inner and outer double toothed rings meshing and matching with the second spur gear and the first spur gear, respectively.
[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. By coordinating the insulation chamber within the drive housing with the protective frame, effective insulation and protection are provided for the internal rotor, preventing damage to the core transmission components from low-temperature environments. The heat transfer cavity and the flow channels of the heat dissipation fin assembly work together to switch the airflow channel state according to operating conditions, achieving precise temperature control in low-temperature environments. Simultaneously, the heat transfer ring plate conducts heat from the drive housing to the control box, providing auxiliary insulation for internal components. This solves the problem of traditional electric actuators being prone to operational failures due to component freezing and failure in low-temperature environments.
[0016] 2. Through the bevel gear meshing transmission of the linkage mechanism and the transmission mechanism, the heat dissipation fin group can be driven to achieve telescopic adjustment, flexibly switching between low-frequency heat preservation and heat dissipation and high-frequency rapid heat dissipation modes, adapting to the heat dissipation needs under different low-temperature working conditions, avoiding energy waste. The staggered and opposing design of multiple main fins and the position adjustment of the main fins and auxiliary fins for different heat dissipation needs can significantly expand the heat dissipation area after telescopic, improve heat exchange efficiency, and solve the defects of fixed heat dissipation structure and poor adaptability of traditional actuators.
[0017] 3. The control box drives the scraper to automatically remove frost and dust from the surface of the heat dissipation fins through the linkage of the second regulating motor, inner and outer double toothed rings and regulating screw, without the need for manual intervention, reducing the difficulty of maintenance in low-temperature environments; each component adopts a modular design, the drive housing is precisely connected to the reversing gear box and control box through the end, and the mounting bracket of the component box facilitates the disassembly and assembly of components, greatly improving maintenance efficiency and reducing downtime.
[0018] In summary, this invention overcomes the shortcomings of the prior art, has strong low-temperature adaptability, flexible heat dissipation adjustment, and convenient and efficient maintenance. It can stably adapt to low-temperature working conditions and improve energy efficiency, and has high social use value and application prospects. Attached Figure Description
[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0020] Figure 1 This is an exploded view of the overall structure of the present invention; Figure 2 This is a schematic diagram of the overall structure of the present invention; Figure 3 This is an exploded view of the structure of the driving housing in this invention; Figure 4 This is a schematic cross-sectional view of the control box in this invention; Figure 5 For this Figure 4 Enlarged view of the local structure at point A; Figure 6 This is a schematic cross-sectional view of the drive housing structure in this invention; Figure 7 For this Figure 6 Enlarged view of the local structure at point B; Figure 8 This is a schematic diagram showing the structural positions of the heat dissipation fin assembly and the drive housing in this invention; Figure 9 This is a schematic diagram showing the structural positions of the heat dissipation fin assembly and the transmission mechanism in this invention.
[0021] In the diagram: 100, reversing gearbox; 1001, main shaft; 1002, mounting end; 200, drive housing; 2001, heat transfer cavity; 2002, through-plate slot; 2003, mounting hole; 2004, front end; 2005, rear end; 2006, heat transfer ring plate; 2007, insulation chamber; 300, linkage mechanism; 3001, linkage shaft compartment; 3002, first regulating motor; 3003, gear ring box; 400, control box; 4001, component box; 4002, control cover; 4003 1. Mounting bracket; 2. Protective frame; 3. Heat dissipation fin assembly; 201. Main fin; 202. Sealing plate; 203. Secondary fin; 204. Flow channel; 21. Linkage frame; 211. Linkage rod; 22. Linkage sleeve; 3. Transmission mechanism; 301. Transmission screw shaft; 3011. Driven bevel gear; 302. Rotating shaft; 3021. Driving bevel gear; 4. Flow booster fan; 5. Heat dissipation fins; 51. Scraper frame; 6. Inner and outer double toothed rings; 7. Adjusting screw; 71. First spur gear; 8. Second adjusting motor; 81. Second spur gear. Detailed Implementation
[0022] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0023] Example 1: Refer to Figures 1 to 9 A low-temperature electric actuator includes a reversing gearbox 100, a drive housing 200, and a control box 400. The control box 400, the drive housing 200, and the reversing gearbox 100 are connected sequentially from left to right. A main shaft 1001 is rotatably provided at the bottom of the reversing gearbox 100. An installation end 1002 for connecting the drive housing 200 is integrally formed on the side of the reversing gearbox 100. A heat-insulating chamber 2007 is provided inside the drive housing 200. The drive housing 200 has a protective frame 1 to protect the internal rotor. The drive housing 200 has staggered through-holes 2002. A heat transfer cavity 2001 is formed inside the drive housing 200. Mounting holes 2003 are formed on the outer surface of the drive housing 200. A heat dissipation fin assembly 2 is movably fitted within the through-holes 2002. The heat dissipation fin assembly 2 includes main fins 201 movably fitted with the through-holes 2002. A sealing plate 202 is provided at the outer end of the main fins 201, and secondary fins 203 are provided on the outer surface of the sealing plate 202. A flow channel 204 is formed at one inner end of the main fins 201. The main fins 201 are arranged in a staggered, opposing configuration, with the flow channel 204 located within the heat transfer cavity 2. When the heat transfer cavity 2001 is outside, the internal space of the heat transfer cavity 2001 can be divided into a single channel for airflow by multiple main fins 201, so that the airflow can circulate inside the heat transfer cavity 2001; when the position of the main fins 201 inside the through-slot 2002 is adjusted and the flow channel 204 is inside the heat transfer cavity 2001, the inside of the heat transfer cavity 2001 is in a fully flowing state. Since the main fins 201 have now extended to the outside of the drive housing 200, the heat dissipation efficiency inside the drive housing 200 is improved. The mounting hole 2003 is equipped with a flow booster fan 4 that provides airflow speed when the heat transfer cavity 2001 is divided into a single channel by multiple main fins 201.
[0024] Specifically, refer to Figure 7 and Figure 8 A transmission mechanism 3 is rotatably provided inside the heat transfer cavity 2001. The transmission mechanism 3 includes a transmission screw shaft 301 and a rotating shaft 302 rotatably connected to the heat transfer cavity 2001. The end of the transmission screw shaft 301 is provided with a driven bevel gear 3011, and the end of the rotating shaft 302 is provided with a driving bevel gear 3021 that meshes with the driven bevel gear 3011. Through the structural design of bevel gear meshing transmission, the power direction is accurately converted, ensuring that the power transmission between the transmission screw shaft 301 and the rotating shaft 302 is stable and efficient. Moreover, the meshing transmission method has a precise transmission ratio, reducing power loss and ensuring the synchronicity and reliability of the adjustment action of the heat dissipation fin assembly 2.
[0025] Specifically, refer to Figure 1 and Figure 3A linkage mechanism 300 is fixedly installed on the outer surface of the drive housing 200. The linkage mechanism 300 includes a linkage shaft compartment 3001 disposed on the outer surface of the drive housing 200. Both ends of the linkage shaft compartment 3001 are provided with gear ring boxes 3003 that are connected to the rotating shafts 302 at both ends of the drive housing 200. The end of the linkage shaft compartment 3001 is provided with a first adjusting motor 3002 that drives the internal transmission shaft. The first adjusting motor 3002 provides a stable power source. Through the cooperation of the linkage shaft compartment 3001 and the gear ring box 3003, the rotating shafts 302 at both ends of the drive housing 200 can be driven to rotate synchronously, realizing the synchronous adjustment of multiple sets of heat dissipation fin groups 2 and improving the adjustment efficiency. At the same time, the linkage mechanism 300 is integrated and installed on the outer surface of the drive housing 200, with a compact structure and saving installation space.
[0026] Specifically, refer to Figure 1 and Figure 6 The drive housing 200 has a rear end head 2005 connected to the control box 400 at its left end and a front end head 2004 connected to the mounting end head 1002 at its right end. A heat transfer ring plate 2006 is provided on the outside of the rear end head 2005. The rear end head 2005 and the front end head 2004 provide a precise positioning reference for the connection between the drive housing 200, the control box 400, and the reversing gear box 100, ensuring that the three are firmly connected and have high coaxiality, reducing vibration and noise during transmission. The heat transfer ring plate 2006 can enhance the heat exchange efficiency at the end of the drive housing 200, avoid heat accumulation at the end in low-temperature environments, ensure the stability of equipment operation, and allow heat to enter the interior of the control box 400, providing insulation for the components installed on the mounting bracket 4003.
[0027] Specifically, refer to Figure 7 and Figure 8 The main fin 201 is provided with a linkage frame 21 and a linkage sleeve 22 at its left and right ends, respectively. The linkage frame 21 is provided with a linkage rod 211 at both ends of the linkage frame 21, which is movably fitted with the linkage sleeve 22. The linkage frame 21 is threadedly fitted with the transmission screw shaft 301. The threaded engagement between the linkage frame 21 and the transmission screw shaft 301 converts the rotational motion into linear motion, realizing the extension and retraction adjustment of the heat dissipation fin group 2 within the through-hole 2002, thereby changing the heat dissipation area and adapting to the heat dissipation requirements under different low-temperature conditions. The fitted engagement between the linkage rod 211 and the linkage sleeve 22 ensures that multiple main fin groups 201 extend and retract synchronously, avoids jamming, and improves the smoothness of adjustment.
[0028] Example 2: Refer to Figure 1 and Figure 9The difference between this embodiment and Embodiment 1 is that the control box 400 is provided with a component box 4001, the outer end of the component box 4001 is provided with a control cover plate 4002, and the bottom of the inner cavity of the component box 4001 is provided with a mounting bracket 4003 for mounting components. The component box 4001 provides a closed protective space for the internal components to prevent moisture and impurities from entering and causing component failure in a low-temperature environment. The mounting bracket 4003 facilitates the orderly installation and disassembly and maintenance of components. The control cover plate 4002 can be opened and closed quickly, which is convenient for staff to inspect and adjust the parameters of the components.
[0029] Specifically, refer to Figure 4 The control box 400 has heat dissipation fins 5 fixedly installed on its outer surface. A scraper 51 that acts on the outer surface of the heat dissipation fins 5 is movably mounted on the outer surface of the control box 400. The heat dissipation fins 5 increase the heat dissipation area of the control box 400 and improve the heat dissipation efficiency of the components during operation. The scraper 51 can move along the outer surface of the control box 400 and can remove frost, dust and other debris from the surface of the heat dissipation fins 5 in a timely manner, so as to avoid the accumulation of debris affecting the heat dissipation effect and ensure the stability of the internal temperature of the control box 400 in low temperature environments.
[0030] Specifically, refer to Figure 4 and Figure 5 The control box 400 has adjusting screws 7 that are rotatably mounted on the left and right ends of its outer surface. A first spur gear 71 is fixedly installed at the top of the adjusting screws 7. The adjusting screws 7 provide power support for the movement of the scraping frame 51. Power transmission is achieved through the first spur gear 71. The structure is simple and reliable. The opposing adjusting screws 7 can ensure that the scraping frame 51 is subjected to balanced force at both ends, and the movement process is smooth, avoiding tilting and jamming.
[0031] Specifically, refer to Figure 5 The second adjusting motor 8 is fixedly installed on the top of the inner wall of the control box 400. The second spur gear 81 is fixedly installed on the top of the output shaft of the second adjusting motor 8. The second adjusting motor 8 provides stable power for the cleaning action of the scraper frame 51. Through the cooperation of the second spur gear 81 with other gear structures, the power is accurately transmitted. Moreover, the motor drive method has a high degree of automation, requiring no manual operation and reducing maintenance costs.
[0032] Specifically, refer to Figure 5 The upper side wall of the control box 400 is fitted with an inner and outer double toothed ring 6. The inner and outer ring teeth of the inner and outer double toothed ring 6 mesh with the second spur gear 81 and the first spur gear 71, respectively. The inner and outer double toothed ring 6 achieves power splitting and synchronous transmission through double tooth surface meshing, so that the second regulating motor 8 can drive the regulating screws 7 at both ends to rotate synchronously, ensuring that the scraper frame 51 moves smoothly. The meshing transmission method has high transmission efficiency, low noise, and compact structure, saving internal installation space in the control box 400.
[0033] Other undescribed structures are described in Example 1.
[0034] Working principle: In this invention, to adjust the heat dissipation requirements in low-temperature environments, the first adjustment motor 3002 is started, and the rotating shaft 302 is driven to rotate through the linkage shaft compartment 3001 and the gear ring box 3003. The active bevel gear 3021 at the end of the rotating shaft 302 meshes with the driven bevel gear 3011 of the transmission screw shaft 301, driving the transmission screw shaft 301 to rotate. Then, through the threaded engagement, the linkage frame 21 drives the heat dissipation fin assembly 2 to extend and retract along the through-plate strip hole 2002, adjusting the heat dissipation area to adapt to different working conditions. When the flow channel 204 is outside the through-plate strip hole 2002, the cooperation of multiple main fins 201 can form an independent airflow channel inside the heat transfer cavity 2001. Then, the airflow speed is increased by the booster fan 4 to make the temperature inside the heat transfer cavity 2001 more uniform. The secondary fins 203 can also perform low-frequency heat dissipation treatment on the temperature inside the heat transfer cavity 2001. When the flow channel 204 is inside the through-strip hole 2002, multiple main fins 201 have extended to the outside of the drive housing 200, so that the flow channel 204 makes the inside of the through-strip hole 2002 a connected cavity. At this time, the temperature inside the heat transfer cavity 2001 is high and it needs to be cooled quickly. The heat dissipation area between the main fins 201 and the secondary fins 203 is increased, thereby improving the high-frequency heat dissipation of the heat inside the heat transfer cavity 2001. The heat transfer ring plate 2006 is designed to allow heat to be dissipated to the inside of the control box 400 when the drive housing 200 is running, thereby keeping the components inside the control box 400 warm. When the temperature is high, the heat can be dissipated through the heat dissipation fins 5 to prevent the control box 400 from overheating.
[0035] The heat generated by the components inside the control box 400 during operation is dissipated through the heat dissipation fins 5. When debris accumulates on the surface of the heat dissipation fins 5, the second regulating motor 8 starts, driving the inner and outer double toothed rings 6 to rotate via the second spur gear 81. The inner and outer double toothed rings 6 drive the first spur gears 71 at both ends and the adjusting screw 7 to rotate synchronously, causing the scraper frame 51 to move along the surface of the heat dissipation fins 5 and remove debris. The heat insulation chamber 2007 cooperates with the protective frame 1 to provide heat insulation protection for the rotor inside the drive housing 200. The heat transfer cavity 2001 cooperates with the flow channel 204 to improve heat exchange efficiency and ensure stable operation of the equipment in low-temperature environments. The opening and closing of the first regulating motor 3002 and the second regulating motor 8 can be controlled by a sensor controller. It is only necessary to set a corresponding temperature sensor for the first regulating motor 3002 and a start-stop program for a corresponding fixed time period for the second regulating motor 8.
[0036] The control method of this invention is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art. The power supply is also common knowledge in the art. Furthermore, since this invention is mainly used to protect mechanical devices, the control method and circuit connection will not be explained in detail here.
[0037] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.
Claims
1. A cryogenic electric actuator, comprising a reversing gearbox (100), a drive housing (200), and a control box (400), characterized in that: The control box (400), drive housing (200), and reversing gearbox (100) are connected in sequence from left to right. The reversing gearbox (100) has a main shaft (1001) rotatably mounted at the bottom end. The side of the reversing gearbox (100) is integrally formed with an installation end (1002) for connecting the drive housing (200). The drive housing (200) has a heat-insulating chamber (2007) inside. The drive housing (200) is provided with a protective frame (1) to protect the internal rotor. The drive housing (200) is provided with staggered through-plate strip holes (2002). The drive housing (200) is provided with a heat transfer cavity (2001). The drive housing (200) is provided with a mounting hole (2003) on its outer surface. The through-plate strip holes (2002) are movably fitted with a heat dissipation fin assembly (2). The heat dissipation fin assembly (2) includes a main fin (201) movably fitted with the through-plate strip holes (2002). The outer end of the main fin (201) is provided with a sealing plate (202). The outer surface of the sealing plate (202) is provided with a secondary fin (203). The inner end of the main fin (201) is provided with a flow channel (204).
2. The cryogenic electric actuator according to claim 1, characterized in that: The heat transfer cavity (2001) is rotatably provided with a transmission mechanism (3). The transmission mechanism (3) includes a transmission screw shaft (301) and a rotating shaft (302) rotatably connected to the heat transfer cavity (2001). The end of the transmission screw shaft (301) is provided with a driven bevel gear (3011), and the end of the rotating shaft (302) is provided with a driving bevel gear (3021) that meshes with the driven bevel gear (3011).
3. A cryogenic electric actuator according to claim 2, characterized in that: A linkage mechanism (300) is fixedly installed on the outer surface of the drive housing (200). The linkage mechanism (300) includes a linkage shaft compartment (3001) disposed on the outer surface of the drive housing (200). Both ends of the linkage shaft compartment (3001) are provided with gear ring boxes (3003) that are connected to the rotating shafts (302) at both ends of the drive housing (200). The end of the linkage shaft compartment (3001) is provided with a first adjusting motor (3002) that drives the internal transmission shaft.
4. A cryogenic electric actuator according to claim 1, characterized in that: The drive housing (200) has a rear end head (2005) connected to the control box (400) at the left end, a front end head (2004) connected to the mounting end head (1002) at the right end, and a heat transfer ring plate (2006) on the outside of the rear end head (2005).
5. A cryogenic electric actuator according to claim 3, characterized in that: The main fin (201) is provided with a linkage frame (21) and a linkage sleeve (22) at its left and right ends respectively. The linkage frame (21) is provided with a linkage rod (211) that is movably fitted with the linkage sleeve (22) at both ends. The linkage frame (21) is threadedly fitted with the transmission screw shaft (301).
6. A cryogenic electric actuator according to claim 1, characterized in that: The control box (400) is equipped with a component box (4001), and the outer end of the component box (4001) is equipped with an operating cover plate (4002). The bottom of the inner cavity of the component box (4001) is equipped with a mounting bracket (4003) for installing components.
7. A cryogenic electric actuator according to claim 1, characterized in that: The control box (400) has heat dissipation ribs (5) fixedly installed on its outer surface, and a scraper frame (51) that acts on the outer surface of the heat dissipation ribs (5) is movably fitted on the outer surface of the control box (400).
8. A cryogenic electric actuator according to claim 7, characterized in that: The control box (400) has adjusting screws (7) that are rotatably mounted on the left and right ends of its outer surface. The first spur gear (71) is fixedly installed at the top of the adjusting screws (7).
9. A cryogenic electric actuator according to claim 8, characterized in that: The second regulating motor (8) is fixedly installed on the top of the inner wall of the control box (400), and the second spur gear (81) is fixedly installed on the top of the output shaft of the second regulating motor (8).
10. A cryogenic electric actuator according to claim 1, characterized in that: The upper side wall of the control box (400) is rotatably fitted with an inner and outer double toothed ring (6), the inner ring teeth and the outer ring teeth of the inner and outer double toothed ring (6) meshing with the second spur gear (81) and the first spur gear (71) respectively.