High-precision sensor deceleration device
Patent Information
- Application Number
- CN202521965477.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-12
- Publication Date
- 2026-10-23
- Estimated Expiration
- 2035-09-12
AI Technical Summary
本实用新型的优点：本实用新型采用纯机械式消隙结构，相较于在加工过程中控制加工间隙来实现消除间隙更为可靠、高效。本实用新型采用单个扭簧即可实现消除齿轮间隙，结构简单。
Smart Images
Figure CN224886282U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of mechanical structure design technology, and specifically relates to a high-precision sensor deceleration device. Background Technology
[0002] Rotary actuators are widely used in aircraft doors, flaps, high-lift systems, etc. They are usually driven by a drive unit to rotate one or more sets of rotary actuators to further realize the functions of doors, flaps, high-lift systems, etc.
[0003] In rotary actuators, RVDT (rotary variable differential transformer) is widely used to monitor and provide feedback on the angle of the rotary actuator. The position of the rotary actuator is then calculated by the host computer and fed back to the controller to stop the rotary actuator from working, thus realizing the position monitoring and control function of the rotary actuator.
[0004] During the rotation of the actuator, due to factors such as gear transmission errors, the drive unit has difficulty stopping at a precise position. When its movement exceeds the range specified by the stroke, it will exert excessive force on the cabin door, flaps, high lift system, etc., and may even cause damage to these systems, resulting in aircraft crash and mission failure.
[0005] To ensure that the system's motion stroke is within the specified range, a high-precision sensor deceleration device needs to be designed to achieve accurate position feedback of the rotary actuator: 1) The general design idea of sensor deceleration device is to ensure a small gap (idle stroke) by controlling the machining accuracy of the transmission gear, but this gap cannot be completely eliminated, and the surface of the gear wears after working for a period of time, resulting in an increase in gap and idle stroke; 2) Electronic components are used to achieve position feedback, but electronic components have a high failure rate. Utility Model Content
[0006] The purpose of this invention is to provide a high-precision sensor deceleration device that uses a purely mechanical structure to monitor the position of a rotary actuator, thereby reducing the probability of position monitoring errors.
[0007] The technical solution of this utility model: In order to achieve the above-mentioned utility model objectives, this utility model designs a high-precision sensor deceleration device, including a sensor positioning housing, a first bearing, a gear shaft, an input gear, an output gear ring, a second bearing, a planetary gear, a fixed gear ring, and an adapter. The sensor positioning housing is fixed on the adapter, and the fixed gear ring is fixed in the mounting cavity formed by the sensor positioning housing and the adapter. The fixed gear ring serves as the mounting carrier for the gear shaft. The gear shaft is fixed on the fixed gear ring by a first bearing. The input gear is fixedly connected to one end of the gear shaft, and the other end of the gear shaft is fixed to the stepped hole inside the output gear ring by a second bearing. A gear segment is also provided in the middle section of the gear shaft. Planetary gears are fitted around the outer periphery of the gear segment. The upper part of the planetary gears meshes with the output gear ring, and the lower part of the planetary gears meshes with the fixed gear ring. The number of teeth of the fixed gear ring and the output gear ring differs by 1, and a large reduction ratio of the sensor reduction device is achieved through the small difference in the number of teeth.
[0008] Furthermore, it also includes a torsion spring, with its two ends respectively mounted on the output gear ring and the sensor positioning housing. The torsion spring can eliminate the gap between the output gear ring and the planetary gear in both forward and reverse directions, so that the gear tooth surfaces always keep in contact, thereby achieving high output accuracy.
[0009] Furthermore, to facilitate the installation and adjustment of the torsion spring, four torsion spring mounting holes are provided on the upper end face of the central boss of the output gear ring, and three torsion spring mounting holes are provided on the sensor positioning housing.
[0010] Furthermore, a spring support is provided between the output gear ring and the torsion spring, the function of which is to support the inner ring of the torsion spring and prevent the torsion spring from changing diameter.
[0011] Furthermore, the lower end of the output gear ring is a cover-like structure with gears on the inner side, and the upper end is an output shaft with internal splines. It is connected to the sensor through the internal splines to realize signal output.
[0012] Furthermore, the gear shaft and the input gear are connected by a square shaft, a hexagonal shaft, or a spline to achieve speed transmission.
[0013] Furthermore, the sensor positioning housing and the adapter are fixedly connected by a flange.
[0014] Furthermore, screws and washers are used at the flange mating installation position to achieve a fixed connection.
[0015] The working principle of this utility model is as follows: The high-precision sensor deceleration device designed in this utility model uses the input gear as the power source to drive the gear shaft to rotate, and transmits the speed signal to the fixed gear ring through the gear on the gear shaft; since the number of teeth of the fixed gear ring and the output gear ring differs by 1, the large reduction ratio of the sensor deceleration device is achieved through the small difference in the number of teeth; the output gear ring is provided with an internal spline and a torsion spring mounting hole, which can be connected to the sensor through the spline to realize the signal output. Advantages of this invention: This invention employs a purely mechanical backlash elimination structure, which is more reliable and efficient than controlling the machining clearance during processing to eliminate backlash. This invention uses only a single torsion spring to eliminate gear backlash, resulting in a simple structure.
[0016] In the design structure of this utility model, the torsion spring can eliminate the gap between the output gear ring and the planetary gears in both forward and reverse directions, ensuring that the gear tooth surfaces always remain in contact, thereby achieving high output accuracy. Because the reducer is equipped with a torsion spring, it can eliminate the gap between the gear ring and the planetary gears in both forward and reverse directions, ensuring that the gear tooth surfaces always remain in contact, thereby achieving high output accuracy. Attached Figure Description
[0017] Figure 1 This is a structural diagram of the high-precision sensor deceleration device of this utility model; Figure 2 Schematic diagram of the sensor positioning housing; Figure 3 This is a schematic diagram of the output gear ring; Figure 4 This is a schematic diagram of the torsion spring installation. Figure 5 This is a schematic diagram of the gear shaft; The components include: sensor positioning housing 1, torsion spring 2, screw 3, washer 4, first bearing 5, gear shaft 6, nut 7, input gear 8, output gear ring 9, spring support 10, second bearing 11, planetary gear 12, sealing ring 13, fixed gear ring 14, and adapter 15. Detailed Implementation
[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings or specific implementation examples. It should be noted that some (but not all) of the disclosed examples are shown in the drawings. In fact, many different examples can be described, and these examples should not be construed as limited to the examples set forth herein. Rather, these examples are described to better demonstrate the positive effects of this utility model, and all aspects not detailed herein are considered to be well-known or conventional techniques in the art.
[0019] As attached Figures 1-5As shown, this utility model is a high-precision sensor deceleration device, including a sensor positioning housing 1, a torsion spring 2, a screw 3, a washer 4, a first bearing 5, a gear shaft 6, a nut 7, an input gear 8, an output gear ring 9, a spring support 10, a second bearing 11, a planetary gear 12, a sealing ring 13, a fixed gear ring 14, and an adapter 15. In specific implementation, the sensor positioning housing 1 is fixed on the adapter 15, and the fixed gear ring 14 is fixed in the mounting cavity formed by the sensor positioning housing 1 and the adapter 15. The annular boss in the middle of the fixed gear ring 14 is precisely engaged between the sensor positioning housing 1 and the adapter 15. A sealing ring 13 is arranged between the upper end of the fixed gear ring 14 and the inner wall of the sensor positioning housing 1. The gear ring 14 has a stepped mounting cavity at its center for mounting the first bearing 5. The outer ring of the first bearing 5 is interference-fitted with the inner wall of the stepped mounting cavity of the fixed gear ring 14, and the inner ring of the first bearing 5 is interference-fitted with the gear shaft 6. The lower end of the gear shaft 6 is fixedly fitted with the input gear 8 for speed transmission. The upper end of the gear shaft 6 is fixed to the stepped hole inside the output gear ring 9 through the second bearing 11. A gear segment is also provided in the middle section of the gear shaft 6. Planetary gears 12 are fitted around the outer periphery of the gear segment. The upper part of the planetary gears 12 meshes with the output gear ring 9, and the lower part of the planetary gears 12 meshes with the fixed gear ring 14. The number of teeth of the fixed gear ring 14 and the output gear ring 9 differs by 1, and a large reduction ratio of the sensor reduction device is achieved through the small difference in the number of teeth.
[0020] In this specific implementation, a torsion spring 2 is also included. The two ends of the torsion spring 2 are respectively mounted on the output gear ring 9 and the sensor positioning housing 1. The torsion spring 2 can eliminate the gap between the output gear ring 9 and the planetary gear 12 in both forward and reverse directions, ensuring that the gear tooth surfaces always remain in contact, thereby achieving high output accuracy. Because a torsion spring is installed inside the reducer, it can eliminate the gap between the gear ring and the planetary gear in both forward and reverse directions, ensuring that the gear tooth surfaces always remain in contact, thereby achieving high output accuracy.
[0021] Example 1: A high-precision sensor deceleration device, comprising a sensor positioning housing 1, a torsion spring 2, a screw 3, a washer 4, a first bearing 5, a gear shaft 6, a nut 7, an input gear 8, an output gear ring 9, a spring support 10, a second bearing 11, a planetary gear 12, a sealing ring 13, a fixed gear ring 14, and an adapter 15 (see...). Figure 1 The sensor positioning housing is provided with threaded holes and torsion spring mounting holes A (see...). Figure 2 The torsion spring is fixed to the adapter with screws. Its two ends are respectively mounted on the output gear ring and the sensor positioning housing. The input gear is locked to the gear shaft with a nut, and the speed signal is transmitted to the fixed gear ring through the gear on the gear shaft. The fixed gear ring and the output gear ring have a tooth difference of 1, which achieves a large reduction ratio in the sensor reduction device. The output gear ring is provided with an internal spline and a torsion spring mounting hole B (see...). Figure 3 It can be connected to the sensor via a spline to output signals. During normal operation, the external rotational speed is transmitted to the sensor reduction device through the input gear 8. The input gear 8 and the gear shaft 6 are fixedly connected by a spline and nut to transmit the rotational speed. The speed is then transmitted to the planetary gear 12 through the gear on the gear shaft 6. A large reduction ratio is achieved through the difference in the number of teeth between the fixed gear ring 14 and the output gear ring 9. Finally, the rotational speed is transmitted to the sensor through the output gear ring.
[0022] The above specific embodiments or examples are only used to explain the technical solutions of this utility model and are not intended to limit this application. Parts not described in detail are considered to be conventional technical means or common knowledge in the field. It can be understood by those skilled in the art that, based on the design concept of this application, adaptive modifications can be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. These modifications, equivalent substitutions, and adaptive improvements do not depart from the technical essence of this utility model and should all be covered within the protection scope of this application.
Claims
1. A high-precision sensor deceleration device, characterized in that, It includes a sensor positioning housing, a first bearing, a gear shaft, an input gear, an output gear ring, a second bearing, planetary gears, a fixed gear ring, and an adapter. The sensor positioning housing is fixed on the adapter, and the fixed gear ring is fixed in the mounting cavity formed by the sensor positioning housing and the adapter. The fixed gear ring serves as the mounting carrier for the gear shaft. The gear shaft is fixed on the fixed gear ring by a first bearing. The input gear is fixedly connected to one end of the gear shaft, and the other end of the gear shaft is fixed to the stepped hole inside the output gear ring by a second bearing. A gear segment is also provided in the middle section of the gear shaft. Planetary gears are fitted around the outer periphery of the gear segment. The upper part of the planetary gears meshes with the output gear ring, and the lower part of the planetary gears meshes with the fixed gear ring. The number of teeth of the fixed gear ring and the output gear ring differs by 1, and a large reduction ratio of the sensor reduction device is achieved through the small difference in the number of teeth.
2. The high-precision sensor deceleration device as described in claim 1, characterized in that, It also includes a torsion spring, the two ends of which are respectively mounted on the output gear ring and the sensor positioning housing.
3. The high-precision sensor deceleration device as described in claim 2, characterized in that, The upper surface of the central boss of the output gear ring is provided with four torsion spring mounting holes, and the sensor positioning housing is provided with three torsion spring mounting holes.
4. The high-precision sensor deceleration device as described in claim 3, characterized in that, A spring support is also provided between the output gear ring and the torsion spring.
5. The high-precision sensor deceleration device as described in claim 1, characterized in that, The lower end of the output gear ring is a cover-shaped structure with gears on the inside, and the upper end is an output shaft with internal splines. It is connected to the sensor through the internal splines to realize signal output.
6. The high-precision sensor deceleration device as described in claim 1, characterized in that, The gear shaft and the input gear are connected by a square shaft, a hexagonal shaft, or a spline to achieve speed transmission.
7. The high-precision sensor deceleration device as described in claim 1, characterized in that, The sensor positioning housing and the adapter are fixedly connected by a flange.
8. The high-precision sensor deceleration device as described in claim 7, characterized in that, Screws and washers are used at the flange mating installation position to achieve a fixed connection.