Electric actuator for valve

Abstract

The utility model provides a valve electric actuator which comprises a control mechanism, a driving motor, a first transmission assembly, a first output shaft, a signal detection encoder mechanism, a middle plate, a second transmission assembly and a second output shaft, and the control mechanism is in communication connection with the driving motor and the signal detection encoder mechanism; the first output end of the driving motor is in transmission connection with the second output shaft through the first transmission assembly, the first output shaft and the second transmission assembly in sequence. The first output shaft and the second transmission assembly are installed on the upper side face and the lower side face of the middle plate correspondingly. The signal detection encoder mechanism is in transmission connection with the first output shaft; and the second output shaft is used for outputting final power to external equipment. The valve electric actuator is compact in structure, convenient to operate and low in cost and has the manual emergency function, and various requirements of the industrial field for valve control are met.

Description

TECHNICAL FIELD

[0001] The utility model relates to electric actuator technical field and particularly relates to a valve electric actuator. BACKGROUND

[0002] Butterfly valves and ball valves are widely used in many industrial fields such as ship systems, and the electric valve actuators thereof need to accurately and reliably realize the opening and closing operations of the valves, and in the event of power failure, the valves are opened by manual operation. However, the existing valve electric actuators have many deficiencies: the overall volume is relatively large, there is no intuitive valve position indicating device, and an accurate electric mechanism control and feedback device is often used, which results in high product cost and limits the application thereof in more fields. SUMMARY

[0003] To solve the above technical problems, the application provides a valve electric actuator.

[0004] The utility model provides a valve electric actuator, which comprises a control mechanism, a driving motor, a first transmission assembly, a first output shaft, a signal detection encoder mechanism, an intermediate plate, a second transmission assembly and a second output shaft. The control mechanism is in communication connection with the driving motor and the signal detection encoder mechanism, respectively. The first output end of the driving motor is in transmission connection with the second output shaft through the first transmission assembly, the first output shaft and the second transmission assembly in sequence. The first output shaft and the second transmission assembly are installed on the upper and lower sides of the intermediate plate, respectively. The signal detection encoder mechanism is in transmission connection with the first output shaft. The second output shaft is used for outputting the final power to an external device. The valve electric actuator of the application can accurately control the opening and closing of the valve, efficiently transmit power and ensure the stability of the actuator structure.

[0005] Further, the valve electric actuator further comprises a self-locking reverse mechanism. The output end of the driving motor is connected with the input end of the first transmission assembly through the self-locking reverse mechanism. The self-locking reverse mechanism can prevent the actuator from rotating in reverse direction and ensure the reliable control of the valve.

[0006] Further, the first transmission assembly and the second transmission assembly are planetary reduction mechanisms. Each stage of planetary gear of the planetary reduction mechanism shares one fixed ring gear. The first transmission assembly and the second transmission assembly are compact in structure and can realize efficient speed reduction and torque increase.

[0007] Further, the planetary reduction mechanism comprises a hole gear, a planetary gear, a fixed ring gear, an integrally formed sun gear and a planet carrier. The inner and outer sides of the planetary gear are in transmission connection with the hole gear or the sun gear of the previous stage and the fixed ring gear, respectively. The planetary gear is fixed on the planet carrier, the first output shaft and the second output shaft. The structure of the planetary reduction mechanism ensures accurate and efficient power transmission and stable fixation of the planetary gear.

[0008] Further, the first transmission assembly comprises a first planetary gear mechanism, a second planetary gear mechanism, a third planetary gear mechanism and a first fixed gear ring, the planet gears of the first planetary gear mechanism, the second planetary gear mechanism and the third planetary gear mechanism share the first fixed gear ring. The addition of the composite material can enhance the mechanical strength, stability and other properties of the aerogel layer. The first transmission assembly provides the advantages of multi-stage reduction and simplifies the transmission structure.

[0009] Further, the second transmission assembly comprises a first gear box planetary gear mechanism, a second gear box planetary gear mechanism and a second fixed gear ring, the outer sides of the planet gears of the first gear box planetary gear mechanism and the second gear box planetary gear mechanism are in meshing transmission with the second fixed gear ring. The multi-stage reduction realizes a suitable transmission ratio and the sharing of the gear ring simplifies the structure.

[0010] Further, the driving motor is further provided with a second output end, and the second output end is installed with a manual wheel. The second output end provides a manual operation function, and increases the operation flexibility.

[0011] Further, the valve electric actuator further comprises an elongated rod penetrating the driving motor, and a position display seat is installed at the top of the elongated rod. The position display seat is arranged to facilitate intuitive observation of the valve position state.

[0012] Further, the self-locking reverse mechanism comprises a self-locking reverse fixed plate, a self-locking upper part and a self-locking intermediate part, the driving motor and the self-locking upper part are in transmission connection, and the two ends of the self-locking intermediate part are respectively connected with the self-locking upper part and the hole gear of the first transmission assembly.

[0013] Further, the signal detection encoder mechanism is assembled with an input gear, and the first output shaft is in meshing connection with the signal detection encoder gear. The meshing connection relationship realizes real-time transmission of the rotation information of the first output shaft to the signal detection encoder mechanism, provides key feedback data for accurate control of the driving motor, and ensures the accuracy and reliability of the valve action.

[0014] Compared with the prior art, the beneficial results of the utility model lie in that:

[0015] 1. The three-stage and two-stage planetary gear mechanisms are adopted, compared with the traditional reducer, the volume is effectively reduced, the structure of the whole electric actuator is more compact, and installation and use are facilitated.

[0016] 2. The driving motor is self-designed, can well adapt to the structure of the product, optimizes the power transmission process, and improves the transmission efficiency.

[0017] 3. The differential transmission principle is used, without adopting high-priced feedback devices, while ensuring the valve control accuracy, the product cost is greatly reduced, and the market competitiveness of the product is improved.

[0018] 4、Through the indication icon and position display device arranged on the upper end cover, the operator can intuitively observe the opening angle of the valve outside the protective cover without the aid of other complex tools, which is convenient for operation and monitoring.

[0019] 5、The signal detection encoder mechanism can accurately control the opening and closing angle of the valve, meeting the requirements of different industrial application scenarios on the control precision of the valve.

[0020] 6、In emergency situations such as power failure, manual adjustment can be performed through the manual wheel to ensure normal operation of the valve and the continuity and safety of industrial production. BRIEF DESCRIPTION OF DRAWINGS

[0021] The accompanying drawings are included to provide a further understanding of embodiments and are incorporated in and constitute a part of this specification. The drawings illustrate embodiments and serve the purpose of explaining the principles of the present application. Other embodiments and many of the intended advantages of the embodiments will be readily appreciated as they become better understood by reference to the following detailed description. The elements of the drawings are not necessarily to scale relative to each other. Like reference numbers designate corresponding similar parts.

[0022] Figure 1 is a perspective view of a valve electric actuator according to the present application;

[0023] Figure 2 is a whole cross-sectional view of a valve electric actuator according to the present application;

[0024] Figures 3a-3b is a cross-sectional view and perspective view of a drive motor and self-locking reverse mechanism of a valve electric actuator according to the present application;

[0025] Figures 4a-4b is an exploded view and cross-sectional view of a first transmission assembly of a valve electric actuator according to the present application;

[0026] Figures 5a-5b is a structure perspective view and front view of a signal detection encoder mechanism of a valve electric actuator according to the present application.

[0027] Figures 6a-6c is an exploded view, cross-sectional view and top view of a second transmission assembly of a valve electric actuator according to the present application.

[0028] Meaning of each number in the figure: 100-control mechanism, 200-upper part, 300-intermediate plate, 400-lower part, 500-lengthening rod, 101-first drive controller, 102-second drive controller, 103-cable harness, 104-junction box, 201-first stage planetary reduction mechanism, 2011-first stage planetary wheel, 202-second stage planetary reduction mechanism, 2021-second stage planetary wheel, 2022-second stage sun wheel, 2023-second stage planet carrier, 203-third stage planetary reduction mechanism, 2031-third stage planetary wheel, 2032-second stage sun wheel, 2033-third stage planet carrier, 204-first fixed ring gear, 205-driving motor, 206-first output shaft, 207-self-locking reverse mechanism, 2071-self-locking reverse fixed plate, 2072-self-locking upper part, 2073-self-locking intermediate part, 2074-deep groove ball bearing one, 2075-cylindrical pin, 2076-spring, 208-signal detection encoder mechanism, 2081-input gear, 209-deep groove ball bearing two, 210-position display seat, 211-hand wheel, 212-protection cover, 213-upper end cover, 214-base, 215-elastic retainer ring one, 216-square hole gear one, 217-O-shaped sealing ring, 218-casing, 401-gearbox first stage planetary reduction mechanism, 4011-gearbox first stage planetary wheel, 4013-gearbox first stage planet carrier, 402-gearbox second stage planetary reduction mechanism, 4021-gearbox second stage planetary wheel, 4022-gearbox second stage sun wheel, 4023-gearbox second stage planet carrier, 403-second output shaft, 404-second fixed ring gear, 405-deep groove ball bearing three, 406-elastic retainer ring two, 407-skeleton oil seal, 408-square hole gear two. DETAILED DESCRIPTION

[0029] In the following detailed description, reference is made to the accompanying drawings, which form a part hereof, and in which are shown by way of illustration illustrative embodiments in which the application can be practiced. For purposes of explanation and illustration, directional terms are used with reference to the orientation of the described figures. However, it is to be understood that the embodiments can be practiced in other orientations than those presented in the figures. The directional terms, such as "top," "bottom," "left," "right," "upper," "lower," and the like are used to aid in describing the embodiments and are not to be construed as limiting. It is to be understood that other embodiments can be utilized and structural or logical changes can be made without departing from the scope of the present application. The following detailed description is, therefore, not to be taken in a limiting sense, and the scope of the present application is defined by the appended claims.

[0030] The utility model provides a valve electric actuator, refer to Figure 1 The utility model discloses a valve electric actuator's perspective drawing and overall section view are shown, like Figures 1-2As shown, the valve electric actuator comprises a control mechanism 100, an upper part 200, an intermediate plate 300 and a lower part 400, and the upper part 200 and the lower part 400 are fixedly connected through the intermediate plate 300. The control mechanism 100 comprises a first drive controller 101, a second drive controller 102, a cable harness 103, a junction box 104 and a power board, the cable harness 103 is responsible for transmitting electrical signals, the junction box 104 is used for external wiring, and the connection of the actuator with an external power supply and a control system is ensured. The control mechanism 100 controls the working of the drive motor 205 by controlling the first drive controller 101 and the second drive controller 102, the drive motor 205 drives the first transmission assembly and the second transmission assembly to rotate, so as to realize the function of driving the external equipment (valve) to open and close.

[0031] In specific embodiments, in combination with Figure 1 - Fig. 3, Figure 3a and Figure 3b respectively show the drive motor and the self-locking reverse mechanism of the valve electric actuator of the utility model, as shown in the figure, the upper part 200 comprises a drive motor 205, a first output shaft 206 and a self-locking reverse mechanism 207 arranged in the upper end cover 213. The self-locking reverse mechanism 207 comprises a self-locking reverse fixed plate 2071, a self-locking upper part 2072 and a self-locking intermediate part 2073. The drive motor 205 and the self-locking upper part 2072 are connected and transmitted, one end of the self-locking intermediate part 2073 is connected with the self-locking upper part 2072 for transmission, and in the installation process, the self-locking intermediate part 2073 is installed with a square hole gear one 216 of the first transmission assembly at the other end, and the drive motor 205 is fixed on the self-locking reverse fixed plate 2071 by bolts.

[0032] Further, the self-locking intermediate part 2073 is provided with a cylindrical pin 2075 and a spring 2076 at both ends, and the self-locking intermediate part 2073 is connected and transmitted with the self-locking upper part 2072 through the four pin shafts above. When the pin shaft on the self-locking upper part 2072 and the cylindrical pin 2075 are in contact and stressed, the spring 2076 in the middle is extruded to form a reverse thrust, thereby achieving the effect of self-locking reverse.

[0033] In specific embodiments, in combination with Figures 1-2 and Figures 4a-4b , Figures 4a-4bThe utility model discloses a valve electric actuator's first drive subassembly's structure explosion map and structure section view are shown respectively. As shown in the drawing, first drive subassembly includes one -level planetary reduction mechanism 201, two -level planetary reduction mechanism 202, three -level planetary reduction mechanism 203, first fixed gear ring 204 and square hole gear one 216. The inside of 3 three -level planetary gears 2031 of three -level planetary reduction mechanism 203 is engaged transmission with square hole gear one 216, and the outside is engaged transmission with first fixed gear ring 204. 3 three -level planetary gears 2031 are fixed on three -level planet carrier 2033 by means of deep groove ball bearing and pin shaft, and three -level sun gear 2032 is integrally formed with three -level planet carrier 2033 and is set on the opposite face of three -level planetary gear 2031. When driving motor 205 rotates, synchronous belt drives self -locking intermediate piece 2073 to rotate, because square hole gear one 216 is fixed on self -locking intermediate piece 2073, square hole gear one 216 also will synchronous rotation, and then square hole gear one 216 and three -level planetary gear 2031 are engaged, drive three -level planetary gear 2031 and three -level sun gear 2032 to rotate. The inside of 3 two -level planetary gears 2021 is engaged with three -level sun gear 2032 to realize transmission, and its outside is engaged with first fixed gear ring 204 to drive. 3 two -level planetary gears 2021 are fixed on two -level planet carrier 2023 by means of deep groove ball bearing and pin shaft, and two -level sun gear 2022 is integrally formed with two -level planet carrier 2023 and is set on the opposite face of two -level planetary gear 2021. When three -level sun gear 2032 rotates, 3 two -level planetary gears 2021 are driven to rotate simultaneously, and two -level sun gear 2022 is driven to rotate. The inside of 3 one -level planetary gears 2011 is engaged transmission with two -level sun gear 2022, and its outside is engaged transmission with first fixed gear ring 204, and first output shaft 206 has 3 tight -fitting pin shafts, and 3 one -level planetary gears 2011 are installed to the pin shaft of first output shaft 206 through needle bearing. When two -level sun gear 2022 rotates, 3 one -level planetary gears 2011 are driven to rotate simultaneously, and first output shaft 206 is driven to rotate, and the output shaft of driving motor 205 is connected with the input end of three -level planetary reduction through self -locking reverse mechanism.

[0034] In a specific embodiment, the upper part 200 further comprises a casing 218 fixed with the upper end cover 213, which is fixedly installed on the base 214, for protecting the driving motor and gear accessories, and internally installed with a driving controller, and the actuator controls the driving motor to work through the driving controller. The junction box 104 is fixedly installed on the casing 218, and the cable harness 103 is fixed on the casing, one end of which is connected to the driving controller inside the casing 218, and the other end is connected to the inside of the junction box 104, for external wiring. One end of the base 214 is fixed with the casing 218 through bolts, and the sealing effect is ensured by means of the O-shaped sealing ring 217, and the other end of the base 214 is fixed with the middle plate 300 through bolts, and the sealing is also ensured by means of the O-shaped sealing ring 217. The first output shaft 206 is guided and installed by means of the deep groove ball bearing two 209, and the installation position is above the base 214, and the elastic retainer ring one 215 for shaft is used for clamping and fixing.

[0035] In a specific embodiment, in combination with Figures 1-2 and Figures 5a-5b , Figures 5a-5b respectively show the perspective view and front view of the signal detection encoder mechanism of the valve electric actuator of the utility model. The signal detection encoder mechanism 208 is driven to rotate when the first output shaft 206 rotates. Through the three-stage gear reduction transmission of the first transmission assembly, the rotating signal is transmitted to the encoder. Then, the encoder transmits the collected signal to the control mainboard of the driving first driving controller 101 and / or second driving controller 102, and then controls the driving motor 205 to rotate clockwise to close the valve and counterclockwise to open the valve. The driving motor 205 is rotated to the first output shaft 206 after planetary gear reduction. The signal detection encoder mechanism 208 is fixed on the base 214, the input gear 2081 of the input end is engaged with the teeth on the first output shaft 206, and the encoder control module transmits the detected position information to the control mainboard through the encoder communication cable to control the driving motor 205 to work. Specifically, the input gear 2081 can be a plastic gear.

[0036] In a specific embodiment, in combination with Figures 1-2 and Figures 6a-6c , Figures 6a-6cThe utility model discloses a valve electric actuator's second drive subassembly's structure explosion map, sectional view and plan view are shown respectively. As shown in the drawing, second drive subassembly includes gear box first planetary reduction mechanism 401, gear box second planetary reduction mechanism 402, second fixed gear ring 404 and square hole gear no. 2 408, and the outside of planetary gear of gear box first planetary reduction mechanism 401, gear box second planetary reduction mechanism 402 is engaged transmission with second fixed gear ring 404. One end of intermediate plate 300 is fixed with base 214 through bolt, and its other end is fixed with second fixed gear ring 404 through bolt. One end of square hole gear no. 2 408 is connected with first output shaft 206 through four square openings and realizes transmission, and the other end of square hole gear no. 2 408 is engaged with gear box second planetary gear 4021 of gear box second planetary mechanism 402 to realize transmission, and square hole gear no. 2 408 passes through the middle of intermediate plate 300. The inside of 4 gear box second planetary gears 4021 is engaged with square hole gear no. 2 408 to realize transmission, and the outside is engaged with second fixed gear ring 404 to realize transmission. 4 gear box second planetary gears 4021 are fixed on gear box second planetary carrier 4023 by means of deep groove ball bearing and pin shaft, gear box second sun gear 4022 is integrally formed with gear box second planetary carrier 4023 and is arranged on the opposite surface of gear box second planetary gear 4021. When first output shaft 206 rotates, it drives square hole gear no. 2 408 to rotate, and square hole gear no. 2 408 rotates and drives gear box second planetary gear 4021 and gear box second sun gear 4022 to rotate. The inside of 4 gear box first planetary gears 4011 is engaged with gear box second sun gear 4022 to realize transmission, and the outside is engaged with second fixed gear ring 404 to realize transmission, and second output shaft 403 is provided with 4 tightly fitted pin shafts, 4 gear box first planetary gears 4011 are arranged on the pin shafts of second output shaft 403 through needle bearing, gear box second sun gear 4022 rotates and synchronously drives 4 gear box first planetary gears 4011 to rotate, and simultaneously drives second output shaft 403 to rotate, second output shaft 403 is matched with valve through four square openings and external equipment, and drives the valve to open and close.

[0037] In a specific embodiment, the maximum diameter of the cross section of the second output shaft 403 is greater than the maximum diameter of the cross section of the first output shaft 206. Two deep groove ball bearings 405 are arranged in the middle of the second fixed gear ring 404, the second output shaft 403 is installed on the second fixed gear ring 404 through the deep groove ball bearings 405, is limited and fixed by using the elastic collar 406 for shaft, and the sealing of the shaft opening position is ensured by using the skeleton oil seal 407.

[0038] In a specific embodiment, the valve electric actuator further comprises an extension rod 500, a position display seat 210 and a manual wheel 211 installed in the protective cover 212, the extension rod 500 penetrates the drive motor 205, the position display seat 210 is fixed to the top end of the extension rod 500, and the extension rod 500 is fixed on the second output shaft 403 of the gear box and rotates with the second output shaft 403 and penetrates the drive motor 205 to the other end. The first output end of the drive motor 205 is connected with the input end of the three-stage planetary reduction mechanism 203 through the self-locking reverse device 207, and the second output end of the drive motor 205 is fixedly connected with the manual wheel 211, which serves as a backup operating device. When the valve electric actuator encounters a power failure condition, the manual wheel can be manually rotated by manpower, so as to realize manual adjustment of the valve angle, effectively avoid the situation that the valve cannot be adjusted due to power failure, and ensure that the valve can still operate normally in special circumstances.

[0039] The valve electric actuator of the present application covers a gear box two-stage planetary reduction, an intermediate plate, a base, an upper end cover, a cable harness, a junction box, a drive motor, a three-stage planetary reduction, a self-locking reverse mechanism, a position display, a signal detection encoder mechanism, a drive controller and a power board, and simultaneously has electric and manual execution mechanisms. The reduction mechanism is composed of a three-stage planetary reduction and a gear box two-stage planetary reduction, and contains a plurality of planetary gears, a planet carrier and corresponding gear shafts. One end of the drive motor is connected with the manual wheel, and the other output end is connected with the driving wheel in the gear box two-stage planetary reduction through the reverse mechanism. The plurality of planetary gears of the planetary reduction are combined with the internal teeth (first fixed gear ring) of the inner wall of the central groove of the fixed drive motor to complete the reduction process, and the rotary motion is sequentially transmitted to the gear box two-stage planetary reduction through the main shaft and the sun gear, and finally transmitted to the second output shaft of the gear box connected with the valve. The planetary gear shaft and the planet carrier connecting shaft are fixed on the planet carrier and the output shaft through flat-end locking pins and deep groove ball bearings. The drive motor is provided with the manual wheel at one end, the main shaft can be driven to rotate by controlling the drive motor, the gear box two-stage reduction is driven to rotate, and the second output shaft drives the valve to rotate. The output shaft of the drive motor has two output ends, one end is used to drive the planetary reduction to rotate, and the other end is used to operate the manual wheel. The volume of the planetary reduction mechanism is reduced under the premise of ensuring the same output torque, and the function of manually opening the valve is achieved. The opening and closing state of the valve can be directly observed at the protective cover, and the signal detection encoder mechanism is used to realize accurate control of the rotation angle of the drive motor.

[0040] It is clear that a person skilled in the art can make various modifications and changes to the embodiments of the present application without departing from the spirit and scope of the present application. In this way, the present application also aims to encompass these modifications and changes if they are within the scope of the claims of the present application and their equivalents. The word "comprising" does not exclude the presence of other elements or steps than those listed in a claim. The simple fact that certain measures are recited in mutually different dependent claims does not indicate that a combination of these measures cannot be used to advantage. Any reference signs in the claims should not be considered as limiting the scope.

Claims

1. A valve electric actuator, characterized by The valve electric actuator comprises a control mechanism, a driving motor, a first transmission assembly, a first output shaft, a signal detection encoder mechanism, an intermediate plate, a second transmission assembly and a second output shaft, wherein: The control mechanism is in communication connection with the driving motor and the signal detection encoder mechanism respectively; The first output end of the driving motor is in transmission connection with the second output shaft via the first transmission assembly, the first output shaft and the second transmission assembly in sequence; The first output shaft and the second transmission assembly are respectively installed on the upper and lower sides of the intermediate plate; The signal detection encoder mechanism is in transmission connection with the first output shaft; The second output shaft is used for outputting final power to external equipment.

2. The electric actuator for valve according to claim 1, wherein The valve electric actuator further comprises a self-locking reverse mechanism, and the output end of the driving motor is connected with the input end of the first transmission assembly through the self-locking reverse mechanism.

3. The electric actuator for valve according to claim 1, wherein The first transmission assembly and the second transmission assembly are planetary reduction mechanisms, and the planetary gears of each stage of the planetary reduction mechanisms share one fixed gear ring respectively.

4. The electric actuator for valve according to claim 3, wherein The planetary reduction mechanism comprises a hole gear, a planetary gear, a fixed gear ring, an integrally formed sun gear and a planet carrier, the inner and outer sides of the planetary gear are in meshing transmission with the hole gear or the sun gear of the upper stage and the fixed gear ring respectively, and the planetary gear is fixed on the planet carrier, the first output shaft and the second output shaft.

5. The electric actuator for valve according to claim 1, wherein The first transmission assembly comprises a first-stage planetary reduction mechanism, a second-stage planetary reduction mechanism, a third-stage planetary reduction mechanism and a first fixed gear ring, and the planetary gears of the first-stage planetary reduction mechanism, the second-stage planetary reduction mechanism and the third-stage planetary reduction mechanism share the first fixed gear ring.

6. The electric actuator for valve according to claim 1, wherein The second transmission assembly comprises a gear box first-stage planetary reduction mechanism, a gear box second-stage planetary reduction mechanism and a second fixed gear ring, and the outer sides of the planetary gears of the gear box first-stage planetary reduction mechanism and the gear box second-stage planetary reduction mechanism are in meshing transmission with the second fixed gear ring.

7. The electric actuator for valve according to claim 1, wherein The driving motor is further provided with a second output end, and the second output end is installed with a manual wheel.

8. The electric actuator for valve according to claim 1, characterized in that, The valve electric actuator further comprises an elongated rod penetrating through the driving motor, and a position display seat is installed on the top of the elongated rod.

9. The electric actuator for valve according to claim 2, characterized in that, The self-locking reverse mechanism comprises a self-locking reverse fixed plate, a self-locking upper part and a self-locking intermediate part, the driving motor and the self-locking upper part are in transmission connection, and the two ends of the self-locking intermediate part are respectively connected with the self-locking upper part and the hole gear of the first transmission assembly.

10. The electric actuator for valve according to claim 1, characterized in that, The signal detection encoder mechanism is assembled with an input gear, and the first output shaft is in meshing connection with the signal detection encoder gear. The signal detection encoder mechanism is assembled with an input gear, and the first output shaft is in meshing connection with the signal detection encoder gear.

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