A device for extending and retracting a single-sided flap system and limiting its position at any angle.

Abstract

This invention belongs to the field of aerospace equipment design and relates to a device for the retraction and extension of a single-sided flap system and its arbitrary angle limiting mechanism. It mainly includes a mounting and fixing mechanism, a speed reduction and torque amplification mechanism, and a limit control mechanism. The mounting and fixing mechanism connects the device to the mounting bracket of the single-sided flap control system and the universal joint of the flap transmission rod. Then, a crank or other power tool is used to input high-speed, low-torque onto the input shaft of the speed reduction and torque amplification mechanism, which is transmitted to the flap transmission rod through the output shaft of the speed reduction mechanism, thus achieving flexible retraction and extension of the flap system. Furthermore, a limit control mechanism is added to the speed reduction mechanism to control the rotation direction of the device and the flap transmission rod, achieving arbitrary angle limiting of the single-sided flap system. This invention solves the problems of difficult retraction and extension and unlimited arbitrary angle limiting in existing single-sided flap control systems without a control mechanism.

Description

Technical Field

[0001] This invention belongs to the field of aviation process equipment design and relates to a device for the retraction and extension of a single-sided flap system and an arbitrary angle limiting device. Background Technology

[0002] Before the wing docking of a certain series of aircraft in my country, the single-sided flap control system was not connected to the flap control mechanism of the center wing. Therefore, the single-sided flap control system lacked power and control limit devices. To prevent the flaps from sliding down due to their own weight during the single-sided wing docking and hoisting process, posing a safety risk, the flaps had to be manually extended to their lower limit before hoisting. Furthermore, after the wing docking was completed, if the flap control mechanism of the center wing failed to function, the flaps needed to be checked again for extension and retraction. The entire process required manual control of the flaps for extension and retraction. Especially during the process of retracting the flaps from their lower limit, due to the flaps' weight, several people needed to manually rotate the flap drive lever simultaneously to retract the flaps, which was extremely time-consuming and labor-intensive, increasing workload and difficulty, and reducing work efficiency. Simultaneously, during the lowering process, someone had to control the flap limit to prevent the flaps from sliding down due to their own weight. Human error or improper operation during this process could lead to safety risks and hazards. Summary of the Invention

[0003] The purpose of this invention is to solve the problems of difficulty in retraction and extension and no limit on arbitrary angle in the operation of the single-sided flap control system of this series of aircraft without a control mechanism. It provides a single-sided flap system retraction and extension and arbitrary angle limit device that is efficient and convenient to install and stable and reliable to use.

[0004] Technical solution

[0005] A device for the retraction and arbitrary angle limiting of a single-sided flap system includes an installation and fixing mechanism, a deceleration and torque-increasing mechanism, and a limiting mechanism;

[0006] The mounting and fixing mechanism includes a tube shaft 1, a flange support arm 3, a shoulder compensation sleeve 4, a tightening sleeve 5, and a support shaft 6. The tube shaft 1 is installed in the cable guide plate mounting groove 15a above the transmission rod support of the single-sided flap control system of the aircraft. The support shaft 6 is installed in the light-reducing hole 15b above the transmission rod support of the single-sided flap control system of the aircraft. The flange support arm 3, the shoulder compensation sleeve 4, and the tightening sleeve 5 are sleeved on the tube shaft 1. The support shaft 6 is installed at one end of the flange support arm 3.

[0007] The speed reduction and torque increasing mechanism includes a first support plate 7, a second support plate 7a, an input shaft 8, bearings 1 and 2, intermediate shaft 9, bearings 3 and 4, pinion 9c, large gear 9d, gear key 1 9e, gear key 2 9f, output shaft 10, bearing 5 10a, bearing 6 10f, gear 10b, and gear key 3 10c. The first support plate 7 and the second support plate 7a are connected by support plate connecting bolts 13, bushings 13a, gaskets 4 13c, and hexagonal self-locking nuts 4 13d. A flange support is provided on the first support plate 7, and one end of the tube shaft 1 is installed inside the flange support. Three sets of bearing seats are respectively provided on the first support plate 7 and the second support plate 7a. The input shaft 8 is installed on a corresponding set of bearing seats on the first support plate 7 and the second support plate 7a via bearings 1 8a and 2 8b. The bearing seat on the second support plate 7a is connected to the power drive mechanism; the intermediate shaft 9 is mounted on the second set of bearing seats on the first support plate 7 and the second support plate 7a via bearings 3 and 4 (9a and 9g); the small gear 9c is sleeved on the intermediate shaft 9 via gear key 1 (9e); the large gear 9d is sleeved on the intermediate shaft 9 via gear key 2 (9f); the large gear 9d meshes with the input shaft 8; the output shaft 10 is mounted on the third set of bearing seats on the first support plate 7 and the second support plate 7a via bearings 5 ​​(10a and 6 (10f)); the gear 10b is sleeved on the output shaft 10 via gear key 3 (10c); the gear 10b meshes with the small gear 9c; one end of the output shaft 10 passes through the bearing seat on the first support plate 7 and is connected to the spline joint 16 of the flap drive rod; the second support plate 7a is provided with a gear position groove.

[0008] The limiting mechanism includes a ratchet rocker arm 14 and a bolt 14a. The ratchet rocker arm 14 includes a ratchet limiting block and a rocker arm. The ratchet limiting block is rotatably mounted on the inner side of the support plate 7a by the bolt 14a. The ratchet limiting block is provided with ratchet teeth at both ends, which mesh with the ratchet on the input shaft 8. The rocker arm passes through the gear groove on the support plate 7a and can slide in the gear groove according to the working conditions to switch between three gears.

[0009] Furthermore, one end of the tube shaft 1 is installed inside the flange support by a hexagonal self-locking nut 1c; the flange support arm 3 is sleeved on the tube shaft 1 by a round-head rivet 2; the support shaft 6 is installed at one end of the flange support arm 3 by a support shaft fixing screw 6a, a washer 6b, a washer 6c, and a hexagonal self-locking nut 6d.

[0010] Furthermore, the retaining ring 9b is sleeved on the intermediate shaft 9, and the retaining ring 9b is located on one side of the pinion 9c, thus limiting the pinion 9c;

[0011] Furthermore, the bushing 10e is fitted onto the output shaft 10 and is located on one side of the gear 10b, thus limiting the position of the gear 10b.

[0012] Furthermore, the crank handle 11 and the handle 12 are connected by a hexagonal self-locking nut 3 12a and a washer 3 12b.

[0013] Furthermore, the power drive mechanism is an electric tool.

[0014] Furthermore, the power drive mechanism includes a crank handle 11 and a handle 12. One end of the input shaft 8 passes through the bearing seat on the support plate 7a and is connected to one end of the crank handle 11, while the other end of the crank handle 11 is connected to the handle 12.

[0015] Furthermore, one end of the input shaft 8 is a standard square connector, which matches the square hole on the crank handle 11.

[0016] Beneficial effects

[0017] This invention provides a device for the deployment and retraction of a single-sided flap system and an arbitrary angle limiting device. It utilizes a flap transmission rod support and its structural installation, offering portable installation and rapid power delivery. The reduction and torque amplification mechanism employs a two-stage involute spur gear reduction principle, converting high-speed, low-torque into low-speed, high-torque, ensuring stable force and motion transmission and accurate and efficient rotation angle control. Furthermore, the input shaft uses a standard square connector, allowing connection to other electric torque converters for power input. The combination of the limiting mechanism and the reduction and torque amplification mechanism prevents the flap from sliding down due to its own weight during the rotation of the single-sided flap control system, achieving arbitrary angle limiting, and simultaneously controlling the input direction of force and motion to the reduction and torque amplification mechanism. Attached Figure Description

[0018] This invention includes 6 figures, and the descriptions of these figures are as follows:

[0019] Figure 1 This is a schematic diagram of the installation of a single-sided flap system retraction and extension and arbitrary angle limiting device;

[0020] Figure 2 This is a schematic diagram of a single-sided flap system retraction and extension and arbitrary angle limiting device;

[0021] Figure 3 This is a schematic diagram of the mounting bracket for the transmission rod joint of a single-sided flap system;

[0022] Figure 4 This is a schematic diagram of a deceleration and torque-increasing mechanism for a single-sided flap system with retraction, extension, and arbitrary angle limiting devices;

[0023] Figure 5 This is a schematic diagram of the connector between output shaft 8 and crank handle 11;

[0024] Figure 6 This is a schematic diagram of the stop positions on the ratchet rocker arm 14 and the support plate 7a of the limit mechanism;

[0025] Among them, 1. Tube shaft, 1a. Tube shaft fixing screw, 1b. Arc-shaped washer, 1c. Hexagonal self-locking nut one, 2. Round head rivet, 3. Flange support arm, 4. Shoulder compensating bushing, 5. Tightening bushing, 6. Support shaft, 6a. Support shaft fixing screw, 6b. Waste one, Waste two, 6c. 6d. Hexagonal self-locking nut two, 7. Support plate one, 7a. Support plate two, 8. Input shaft, 8a. Bearing one, 8b. Bearing two, 9. Intermediate shaft, 9a. Bearing three, 9g. Bearing four, 9b. Retaining ring, 9c. Small gear, 9d. Large gear, 9e. Gear key one, 9f. Gear key II. 10. Output shaft; 10a. Bearing 5; 10f. Bearing 6; 10b. Gear; 10c. Gear key 3; 10e. Bushing; 11. Crank handle; 12. Handle; 12a. Hexagonal self-locking nut 3; 12b. Washer 3; 13. Two-side support plate connecting bolts; 13a. Bushing; 13d. Hexagonal self-locking nut 4; 13c. Washer 4; 14. Ratchet rocker arm; 14a. Bolt; 15. Joint mounting bracket; 15a. Steel cable guide plate mounting groove; 15b. Lightening hole; 16. Spline joint; 17. Flap drive rod; 18. Flap drive rod universal joint. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings. A device for the retraction and extension of a single-sided flap system and for limiting it at any angle includes a mounting and fixing mechanism, a deceleration and torque-increasing mechanism, and a limiting mechanism.

[0027] The mounting and fixing mechanism includes a tube shaft 1, a flange support arm 3, a shoulder compensation sleeve 4, a tightening sleeve 5, and a support shaft 6. The tube shaft 1 is installed in the cable guide plate mounting groove 15a above the transmission rod support of the single-sided flap control system of the aircraft. The support shaft 6 is installed in the light-reducing hole 15b above the transmission rod support of the single-sided flap control system of the aircraft. The flange support arm 3, the shoulder compensation sleeve 4, and the tightening sleeve 5 are sleeved on the tube shaft 1. The support shaft 6 is installed at one end of the flange support arm 3.

[0028] The mounting bracket at one end of the transmission rod of the single-sided flap control system of this series of aircraft is used as the mounting base for this device, such as... Figure 3The steel cable guide plate mounting groove 15a and the lightening hole 15b above the joint mounting support serve as mounting supports for the tube shaft 1 and the support shaft 6. The tube shaft 1 is connected to the support plate 7 of the speed reduction and torque amplification mechanism, serving as the connecting main shaft. The support shaft 6 prevents the speed reduction and torque amplification mechanism from shaking and deflecting. The tube shaft 1 is made of 30CrMnSi material to ensure support strength, and a thread is machined at one end of the tightening bushing 5 to mate with it. The support shaft 6 and the shoulder compensation bushing 4 are made of POM (polyoxymethylene) material to prevent impact damage to the inner walls of the mounting groove 15a and the lightening hole 15b on the joint mounting support. The flange support arm 3 and the tightening bushing 5 are made of LD5 (molded) material, and a rubber gasket is attached to the surface of the tightening bushing 5 that mates with the mounting groove 15a.

[0029] Speed ​​reduction and torque amplification mechanisms, such as Figure 2 The main principle is to convert high-speed, low-torque input into low-speed, high-torque input through a two-stage reduction mechanism. The reduction and torque-increasing mechanism includes support plate 1 (7), support plate 2 (7a), input shaft 8, bearing 1 (8a), bearing 2 (8b), intermediate shaft 9, bearing 3 (9a), bearing 4 (9g), pinion 9c, gear 9d, gear key 1 (9e), gear key 2 (9f), output shaft 10, bearing 5 (10a), bearing 6 (10f), gear 10b, and gear key 3 (10c). Support plates 1 (7) and 2 (7a) are connected by support plate connecting bolts 13, bushings 13a, gaskets 4 (13c), and hexagonal self-locking nuts 4 (13d). A flange support is provided on support plate 1 (7), and one end of the tube shaft 1 is installed inside the flange support. Three sets of bearing seats are respectively provided on support plates 1 (7) and 2 (7a). The input shaft 8 is installed on a corresponding set of bearing seats on support plates 1 (7) and 2 (7a) through bearings 1 (8a) and 2 (8b). The bearing seat on the second support plate 7a is connected to the power drive mechanism; the intermediate shaft 9 is mounted on the second set of bearing seats on the first support plate 7 and the second support plate 7a via bearings 3 and 4 (9a and 9g); the small gear 9c is sleeved on the intermediate shaft 9 via gear key 1 (9e); the large gear 9d is sleeved on the intermediate shaft 9 via gear key 2 (9f); the large gear 9d meshes with the input shaft 8; the output shaft 10 is mounted on the third set of bearing seats on the first support plate 7 and the second support plate 7a via bearings 5 ​​(10a and 6 (10f)); the gear 10b is sleeved on the output shaft 10 via gear key 3 (10c); the gear 10b meshes with the small gear 9c; one end of the output shaft 10 passes through the bearing seat on the first support plate 7 and is connected to the spline joint 16 of the flap drive rod; the second support plate 7a is provided with a gear position groove.

[0030] The assembled input shaft 8, intermediate shaft 9, and output shaft 10 are installed on the two side support plates 7 and 7a using connecting bolts 13. Figure 2 High-speed, low-torque input can be achieved using crank handle 11 or other electric torque tools from the standard square connector on output shaft 8. Figure 5 Through a two-stage reduction gear, a low-speed, high-torque output is generated from the output shaft 10, connecting the splined end of the output shaft 10 to the splined joint 16 of the flap drive rod, thereby realizing the movement and extension of the single-sided flap control system. The side support plates are made of LD5 (molded) material; the input shaft 8, pinion 9c, gear 9d, and gear 10b are made of 30CrMnSi material after heat treatment; the intermediate shaft 9 and output shaft 10 are made of 40Cr material after quenching and tempering; bearings 8, 8a, 9a, 9g, 10a, and 10f are angular contact ball bearings.

[0031] Limit control mechanism such as Figure 6 Utilizing the two-way reversing control principle of a ratchet, the ratchet is combined with a speed reduction and torque amplification mechanism. The limiting mechanism includes a ratchet rocker arm 14 and a bolt 14a. The ratchet rocker arm 14 includes a ratchet limiting block and a rocker arm. The ratchet limiting block is rotatably mounted inside the support plate 7a via the bolt 14a. Both ends of the ratchet limiting block are provided with ratchet teeth that mesh with the ratchet on the input shaft 8. The rocker arm extends out of the gear groove on the support plate 7a and can slide within the gear groove according to working conditions, performing three-gear switching. The bolt 14a is mounted on the support plate 7a. By moving the ratchet rocker arm 14 to different gear positions, the teeth on the upper part of the ratchet rocker arm 14 mesh with the ratchet teeth at one end of the input shaft 8, thereby achieving arbitrary angle limiting of the single-sided flap control system. The ratchet rocker arm 14 is made of 30CrMnSi material and heat-treated. A hole is drilled on the upper surface of the lever according to the HB-3101 square joint technical requirements, a spring is inserted, a ball is pressed, and it cooperates with the stop groove on the support plate 2 7a to restrict the ratchet rocker arm 14 to rotate only in the stop groove on the support plate 2 7a.

[0032] In this invention, one end of the tube shaft 1 is installed in the flange support by a hexagonal self-locking nut 1c; the flange support arm 3 is sleeved on the tube shaft 1 by a round-head rivet 2; the support shaft 6 is installed at one end of the flange support arm 3 by a support shaft fixing screw 6a, a washer 6b, a washer 6c, and a hexagonal self-locking nut 6d.

[0033] In this invention, the retaining ring 9b is sleeved on the intermediate shaft 9, and the retaining ring 9b is located on one side of the pinion 9c to limit the pinion 9c.

[0034] In this invention, the bushing 10e is sleeved on the output shaft 10 and located on one side of the gear 10b to limit the position of the gear 10b.

[0035] In this invention, the crank 11 and the handle 12 are connected by a hexagonal self-locking nut 12a and a washer 12b.

[0036] In this invention, the power drive mechanism is an electric tool.

[0037] In this invention, the power drive mechanism includes a crank handle 11 and a handle 12. One end of the input shaft 8 passes through the bearing seat on the support plate 7a and is connected to one end of the crank handle 11. The other end of the crank handle 11 is connected to the handle 12.

[0038] In this invention, one end of the input shaft 8 is a standard square connector that matches the square hole on the crank handle 11.

[0039] Before use, assemble the device. First, insert the tube shaft 1 into the support plate 7 and fix it using the tube shaft fixing screw 1a, arc-shaped washer 1b, and hexagonal self-locking nut 1c. Rivet the flange support arm 3 to the tube shaft 1 using round-head rivets 2. Screw the shoulder compensation bushing 4 and tightening bushing 5 onto the tube shaft 1. Fix the support shaft 6 using fixing screw 6a, washer 6b, washer 6c, and hexagonal self-locking nut 6c. Then, install the input bearing 8 and bearing 8a at both ends of the input shaft 8. Install bearing 9a, bearing 9g, retaining ring 9b, pinion 9c, and gear 9d onto the intermediate shaft 9 in sequence. Fix the pinion 9c and gear 9d using gear keys 9e and 9f. Install bearing 10a, bearing 10f, gear 10b, and bushing 10e onto the output shaft 10 in sequence. Fix gear 10b using gear key 10c. Secondly, the inner and outer rings of the bearings at both ends of the input shaft 8, intermediate shaft 9, and output shaft 10 are all fitted with a small interference fit. Next, the assembled bearings at both ends of the input shaft 8, intermediate shaft 9, and output shaft 10 are installed into the support plates 7 and 7a, and secured firmly using connecting bolts 13, bushings 13a, hexagonal self-locking nuts 13d, and washers 13c. Finally, the ratchet rocker arm 14 and bolt 14a are installed on the support plate 7a. During installation, it should be ensured that the ratchet rocker arm 14 can rotate freely on the bolt 14a without jamming. At this point, the installation and fixing mechanism, the speed reduction and torque increase mechanism, and the limit control mechanism are assembled. The above work is for initial use and will only be disassembled during subsequent maintenance and inspection.

[0040] In use, first unscrew the tightening bushing 5 on the tube shaft 1, align the splined end of the output shaft 10 with the universal spline joint 16 of the flap drive rod, and insert it. Then, simultaneously push the device along the axial direction of the tube shaft 1 with the shoulder compensation bushing 4 and the support shaft 6 on the flange support arm 3, inserting the support rubber shaft on the tube shaft 1 and the support rocker arm 6 into the steel cable guide plate mounting groove 15a and the lightening hole 15b of the joint mounting support 15 (e.g., Figure 1 Adjust the installation posture of the device appropriately to ensure that the inner end face of the shoulder compensation bushing 4 is fully engaged with the end face of the guide plate mounting groove 15a, insert the spline end of the output shaft 10 into the universal spline connector 16 to a sufficient engagement depth, tighten the tightening bushing 5 on the tube shaft 1, and gently shake the device by hand to check whether the installation is secure.

[0041] During operation, the ratchet rocker arm 14 is moved to the neutral position on the support plate 7a. The ball on the ratchet rocker arm 14 slides into the groove corresponding to the neutral position on the support plate 7a. A crank or other electric wrench is connected to the standard square connector of the input shaft 8 as a power input. The rotation of the input shaft 8 drives the entire reduction and torque amplification mechanism, transmitting power to the flap transmission rod 17, which in turn moves the flap on one side. By switching the rotation direction of the power input, the flexibility of the single-sided flap control system is checked. When the ratchet rocker arm 14 is moved to the forward rotation position on the support plate 7a, the ball on the ratchet rocker arm 14 slides into the groove corresponding to the forward rotation position on the support plate 7a. The upper right tooth of the ratchet rocker arm 14 meshes with the ratchet tooth of the input shaft 8. At this time, the input shaft 8 can only rotate clockwise and cannot rotate counterclockwise, thus realizing the forward operation of the single-sided flap control system and moving the flap downward. When the ratchet rocker arm 14 is moved to the reverse position on the support plate 7a, the ball on the handle of the ratchet rocker arm 14 slides into the groove corresponding to the reverse position on the support plate 7a. The upper left tooth of the ratchet rocker arm 14 meshes with the ratchet tooth of the input shaft 8. At this time, the input shaft 8 can only rotate counterclockwise and cannot rotate clockwise, thereby realizing the reverse operation of the single-sided flap control system and retracting the flap. At the same time, as long as the ratchet rocker arm 14 is moved to the reverse position on the support plate 7a, the single-sided flap control system can only retract and cannot lower. The flap control system will not slide down due to the weight of the flap, thus protecting the flap control system and limiting its movement at any angle.

[0042] Implementation 1: Before wing docking, when the middle and outer wings are not lifted on the transport vehicle, install the device in place on the ground, move the ratchet rocker arm 14 to the forward rotation position on the support plate 7a, and use a crank or other electric wrench or other power input connection input shaft 8 standard square connector to place the flaps to the required position for docking. Then move the ratchet rocker arm 14 to the reverse rotation position on the support plate 7a. At this time, the single-sided flap control system can only be retracted and cannot be lowered to prevent the flaps from sliding down due to their own weight during the docking and hoisting of the single-sided wing.

[0043] Implementation 2: After the wing docking is completed, when the flap edge margin at the joint between the center wing and the flap is adjusted, in order to facilitate the construction of the flap edge margin adjustment and the inspection of the gap at the docking point, the flap can be raised, lowered, and limited to any position by switching the ratchet rocker arm 14 to the forward and reverse gear on the support plate 7a.

[0044] Implementation 3: After the wing docking is completed, when checking the flexibility of the single-sided flap control system, move the ratchet rocker arm 14 to the neutral position on the support plate 7a, and connect a crank or other electric wrench to the standard square connector of the input shaft 8 to retract or extend the flaps, and check whether the state of the single-sided flap control system during movement meets the technical requirements.

Claims

1. A device for extending, retracting, and limiting the angle of a single-sided flap system, characterized in that, This includes the mounting and fixing mechanism, the speed reduction and torque increase mechanism, and the limit mechanism; The mounting and fixing mechanism includes a tube shaft, a flange support arm, a shoulder compensation sleeve, a tightening sleeve, and a support shaft. The tube shaft is installed in the cable guide plate mounting groove above the transmission rod support of the aircraft's single-sided flap control system. The support shaft is installed in the lightening hole above the transmission rod support of the aircraft's single-sided flap control system. The flange support arm, shoulder compensation sleeve, and tightening sleeve are sleeved on the tube shaft. The support shaft is installed at one end of the flange support arm. The speed reduction and torque amplification mechanism includes support plate 1, support plate 2, input shaft, bearing 1, bearing 2, intermediate shaft, bearing 3, bearing 4, pinion, gear, gear key 1, gear key 2, output shaft, bearing 5, bearing 6, gear, and gear key 3. Support plate 1 and support plate 2 are connected by support plate connecting bolts, bushings, gaskets, and hexagonal self-locking nuts. A flange support is provided on support plate 1, and one end of the tube shaft is installed inside the flange support. Three sets of bearing seats are respectively provided on support plate 1 and support plate 2. The input shaft is installed on a corresponding set of bearing seats on support plate 1 and support plate 2 via bearings 1 and 2, and one end of the input shaft extends out of the support plate. The bearing housing on plate two is connected to the power drive mechanism; the intermediate shaft is mounted on the corresponding second set of bearing housings on support plates one and two via bearings three and four; the small gear is sleeved on the intermediate shaft via a gear key, and the large gear is sleeved on the intermediate shaft via gear key two; the large gear meshes with the input shaft; the output shaft is mounted on the corresponding third set of bearing housings on support plates one and two via bearings five and six; the gear is sleeved on the output shaft via gear key three; the gear meshes with the small gear; one end of the output shaft passes through the bearing housing on support plate one and connects to the spline joint of the flap drive rod; the support plate two is provided with a gear groove; The limiting mechanism includes a ratchet rocker arm and a bolt. The ratchet rocker arm includes a ratchet limiting block and a rocker arm. The ratchet limiting block is rotatably mounted on the inner side of the second support plate by the bolt. The ratchet limiting block is provided with ratchet teeth at both ends, which mesh with the ratchet on the input shaft. The rocker arm passes through the gear groove on the second support plate and can slide in the gear groove according to the working conditions to switch between three gears.

2. The single-sided flap system retraction and arbitrary angle limiting device according to claim 1, characterized in that, One end of the tube shaft is installed inside the flange support by a hexagonal self-locking nut; the flange support arm is sleeved on the tube shaft by a round-head rivet; the support shaft is installed at one end of the flange support arm by a support shaft fixing screw, a washer 1, a washer 2, and a hexagonal self-locking nut 2.

3. The single-sided flap system retraction and arbitrary angle limiting device according to claim 1, characterized in that, The retaining ring is fitted onto the intermediate shaft and is located on one side of the pinion to limit the pinion's movement.

4. The single-sided flap system retraction and arbitrary angle limiting device according to claim 1, characterized in that, The bushing is fitted onto the output shaft and located on one side of the gear to limit the gear's movement.

5. The single-sided flap system retraction and arbitrary angle limiting device according to claim 1, characterized in that, The crank handle and the grip are connected by a hexagonal self-locking nut and a washer.

6. The single-sided flap system retraction and arbitrary angle limiting device according to claim 1, characterized in that, The power drive mechanism is an electric tool.

7. A single-sided flap system retraction and arbitrary angle limiting device according to claim 5, characterized in that, The power drive mechanism includes a crank handle and a handle. One end of the input shaft passes through the bearing seat on the second support plate and is connected to one end of the crank handle, while the other end of the crank handle is connected to the handle.

8. A single-sided flap system retraction and arbitrary angle limiting device according to claim 7, characterized in that, One end of the input shaft is a standard square connector, which matches the square hole on the crank handle.

Images