A dual passage self-resetting locking device capable of hydraulic and mechanical driving

Abstract

The application belongs to the field of aircraft structure design, and particularly relates to a double-channel self-reset locking device capable of realizing hydraulic and mechanical driving, which comprises a hydraulic driving mechanism, a mechanical driving mechanism and a locking module; the locking module comprises a lock hook, a torsional spring, a connecting rod and a first rocker arm; the lock hook is connected to a body structure through a rotating shaft, one end of the torsional spring is fixed on the body structure and the other end is overlapped on the lock hook; a normal unlocking rocker arm and an emergency unlocking rocker arm are coaxially abutted or separated from the first rocker arm in the circumferential direction, and when abutting, the normal unlocking rocker arm or the emergency unlocking rocker arm can drive the first rocker arm to rotate under the power driving; when the normal unlocking rocker arm abuts against the first rocker arm, the emergency unlocking rocker arm is separated from the first rocker arm; when the emergency unlocking rocker arm abuts against the first rocker arm, the normal unlocking rocker arm is separated from the first rocker arm. The layout is reasonable, the locking reliability is high, the locking device has good arrangement accessibility, and is convenient for inspection and maintenance, disassembly and installation.

Description

Technical Field

[0001] This application belongs to the field of aircraft structural design, and specifically relates to a dual-path self-resetting locking device that can achieve hydraulic and mechanical drive. Background Technology

[0002] Aircraft locking devices typically employ hydraulic unlocking and a backup unlocking system, such as a backup air source or a backup hydraulic source, all sharing a drive unit to complete the backup unlocking. This means that the normal unlocking function and the emergency unlocking function are not completely independent and can affect each other, reducing the reliability of the mission unit.

[0003] The locking mechanism is unlocked by a hydraulic actuator. This type of locking device requires an independent unlocking actuator to complete the unlocking task. Due to hydraulic fluctuations in the energy system on the machine, the normal unlocking function and the emergency unlocking function affect each other during operation. In the normal unlocking mode, there is a problem of accidental unlocking caused by fluctuations in the mechanism and actuator.

[0004] Therefore, how to prevent the normal unlocking function and the emergency unlocking function from interfering with each other is a problem that needs to be solved. Summary of the Invention

[0005] To address the aforementioned issues, this application provides a dual-path self-resetting locking device capable of both hydraulic and mechanical drive, thereby resolving the problem of mutual interference between the normal unlocking function and the emergency unlocking function in the prior art.

[0006] The technical solution of this application is: a dual-path self-resetting locking device that can realize hydraulic and mechanical drive, including a hydraulic drive mechanism, a mechanical drive mechanism and a locking module;

[0007] The hydraulic drive mechanism is connected to the locking module and is capable of hydraulic unlocking; the mechanical drive mechanism is connected to the locking module and is capable of emergency unlocking.

[0008] The locking module includes a locking hook, a torsion spring, a connecting rod, and a first rocker arm; the locking hook is connected to the machine body structure via a rotating shaft, one end of the torsion spring is fixed to the machine body structure, and the other end is attached to the locking hook; the locking hook tends to be locked under the action of the torsion spring.

[0009] One end of the connecting rod is hinged to the lock hook and the other end is connected to the first rocker arm; the hydraulic drive mechanism includes a normal unlocking rocker arm and the mechanical drive mechanism includes an emergency unlocking rocker arm; the first rocker arm, the normal unlocking rocker arm and the emergency unlocking rocker arm are coaxially connected to the body structure.

[0010] The normal unlocking rocker arm and the emergency unlocking rocker arm are coaxially connected or separated from the first rocker arm in the circumferential direction. When they are connected, the normal unlocking rocker arm or the emergency unlocking rocker arm can drive the first rocker arm to rotate under power.

[0011] When the normal unlocking rocker arm is in contact with the first rocker arm, the emergency unlocking rocker arm separates from the first rocker arm; when the emergency unlocking rocker arm is in contact with the first rocker arm, the normal unlocking rocker arm separates from the first rocker arm.

[0012] Preferably, the first rocker arm is provided with a first boss, the normal unlocking rocker arm is provided with a second boss, and the stress unlocking rocker arm is provided with a third boss. The second boss and the third boss are located above the first boss and abut or separate from the first boss in the circumferential direction on the same axis.

[0013] Preferably, the locking position of the locking hook under the action of the torsion spring is designed with an offset from the center of the rotating shaft.

[0014] Preferably, the hydraulic drive mechanism further includes a hydraulic unlocking actuator, the piston rod of which is hinged to the normal unlocking rocker arm, and the normal unlocking rocker arm is rotated when the piston rod of the hydraulic unlocking actuator retracts.

[0015] Preferably, the mechanical drive mechanism further includes a pull rod, a multi-stage conversion module, a steel cable, and a handle assembly;

[0016] One end of the lever is connected to the emergency unlocking rocker arm, and the other end is connected to the multi-stage conversion module. The multi-stage conversion module can perform force conversion and operating stroke matching. The steel cable is connected between the handle assembly and the multi-stage conversion module. The handle assembly is used for manual operation to pull the steel cable and the lever.

[0017] Preferably, the multi-stage conversion module includes a multi-stage lever arm conversion rocker arm, a tension spring, a spring connecting rod, and a spring support; the multi-stage lever arm conversion rocker arm is provided with a first sector-shaped component connected to a steel cable, and the multi-stage lever arm conversion rocker arm is provided with three connection interfaces for force value conversion and operating stroke matching; the tension spring is connected between the multi-stage lever arm conversion module and the spring connecting rod, the spring connecting rod is connected to the spring support, and the spring support is fixed to the machine body structure; the tension spring can drive the multi-stage lever arm conversion rocker arm to reset.

[0018] Preferably, the first sector-shaped component includes a sector-shaped wheel with a cable groove and two connecting lugs, and the steel cable is connected in the cable groove.

[0019] Preferably, the multi-stage lever arm conversion rocker arm is connected to the tension spring through an ear hole.

[0020] Preferably, the spring link is equipped with a bearing and connected to a spring support, and the spring link is rotatable about the spring support.

[0021] Preferably, the handle assembly includes a handle and a second sector member fixedly connected to the handle, the second sector member being connected to a steel cable, and the handle being rotatably connected to the machine body structure.

[0022] The dual-path self-resetting locking device of this application, which can be driven by both hydraulic and mechanical means, has the following advantages:

[0023] With a reasonable layout and high locking reliability, the locking device is easily accessible, facilitating inspection, maintenance, disassembly, and installation. It can operate in both hydraulic and mechanical drive modes, which are independent and do not affect each other. The mechanism includes a return spring for active reset, and can also correct the locking trajectory of the locked target to a certain extent, ensuring the correct locking position of the locking ring on the hook. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of this application;

[0025] Figure 2 This is a partial schematic diagram of the locked state of this application;

[0026] Figure 3 This is a partial schematic diagram of the normal unlocked state of this application;

[0027] Figure 4 This is a partial schematic diagram of the emergency unlocking state of this application.

[0028] Figure 5 This is a schematic diagram of the locking force state of the locking hook in this application.

[0029] 1. Lock hook; 2. Torsion spring; 3. Connecting rod; 4. First rocker arm; 4-1. First boss; 5. Normal unlocking rocker arm; 5-1. Second boss; 6. Emergency unlocking rocker arm; 6-1. Third boss; 7. Hydraulic unlocking actuator; 8. Pull rod; 9. Multi-stage lever arm conversion rocker arm; 10. Tension spring; 11. Spring connecting rod; 12. Spring support; 13. Steel cable; 14. Handle assembly. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be described in more detail below with reference to the accompanying drawings. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are only some, not all, of the embodiments of this application. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application. The embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0031] The first aspect of this application provides a dual-path self-resetting locking device capable of both hydraulic and mechanical actuation, such as... Figure 1 It includes a hydraulic drive mechanism, a mechanical drive mechanism, and a locking module.

[0032] The hydraulic drive mechanism is connected to the locking module and can perform hydraulic unlocking; the mechanical drive mechanism is connected to the locking module and can perform emergency unlocking.

[0033] The locking module includes a locking hook 1, a torsion spring 2, a connecting rod 3, and a first rocker arm 4; the locking hook 1 is connected to the body structure via a rotating shaft, one end of the torsion spring 2 is fixed to the body structure, and the other end is attached to the locking hook 1; the locking hook 1 tends to be locked under the action of the torsion spring 2.

[0034] One end of the connecting rod 3 is hinged to the locking hook 1, and the other end is connected to the first rocker arm 4; the hydraulic drive mechanism includes a normal unlocking rocker arm 5, and the mechanical drive mechanism includes an emergency unlocking rocker arm 6. The first rocker arm 4, the normal unlocking rocker arm 5, and the emergency unlocking rocker arm 6 are coaxially connected to the machine body structure.

[0035] The normal unlocking rocker arm 5 and the emergency unlocking rocker arm 6 are coaxially aligned and circumferentially abutting or separating from the first rocker arm 4. When they abut, the normal unlocking rocker arm 5 or the emergency unlocking rocker arm 6 can drive the first rocker arm 4 to rotate under power.

[0036] When the normal unlocking rocker arm 5 is in contact with the first rocker arm 4, the emergency unlocking rocker arm 6 is separated from the first rocker arm 4; when the emergency unlocking rocker arm 6 is in contact with the first rocker arm 4, the normal unlocking rocker arm 5 is separated from the first rocker arm 4.

[0037] Two independent unlocking pathways are defined: the hydraulic normal unlocking and mechanical emergency unlocking functions are separated. The operation of one pathway will not affect the linkage of the other pathway, so that the two pathways do not interfere with each other, which greatly improves the safety of the mechanism.

[0038] The torsion spring 2 continuously presses the locking hook 1, and the locking hook 1 naturally has the ability to automatically lock and reset. After stopping / releasing pressure, the locking hook 1 can automatically return to the locked position.

[0039] The coaxial rocker arm and the abutment-separated force transmission structure mechanically block the risk of unauthorized unlocking caused by hydraulic pressure fluctuations and impact loads.

[0040] A single locking module is shared, with only the drive path being separate, simplifying the overall structure, reducing the number of parts, and minimizing the space required for layout.

[0041] Preferably, the first rocker arm 4 is provided with a first boss 4-1, the normal unlocking rocker arm 5 is provided with a second boss 5-1, and the stress unlocking rocker arm is provided with a third boss 6-1. The second boss 5-1 and the third boss 6-1 are located above the first boss 4-1 and abut or separate from the first boss 4-1 in the circumferential direction on the same axis.

[0042] like Figures 2-4 When locked, the first protrusion 4-1 on the rocker arm of the linkage 3, the second protrusion 5-1 on the normal unlocking rocker arm 5, and the third protrusion 6-1 on the emergency unlocking rocker arm 6 are in contact with the first protrusion 4-1.

[0043] Under the action of the hydraulic unlocking actuator 7, the second boss 5-1 of the normal unlocking rocker arm 5 rotates and separates from the first boss 4-1 of the rocker arm of the pull rod 8; the emergency unlocking rocker arm 6 remains stationary under the action of the tension spring 10, and the third boss 6-1 on the emergency unlocking rocker arm 6 separates from the first boss 4-1 on the rocker arm of the connecting rod 3, without affecting each other.

[0044] Under the operating force of the handle assembly 14, the third boss 6-1 of the emergency unlocking rocker arm 6 rotates and separates from the first boss 4-1 of the rocker arm of the lever 8; the normal unlocking rocker arm 5 remains stationary under the action of the tension spring 10, and the second boss 5-1 on the normal unlocking rocker arm 5 separates from the first boss 4-1 on the rocker arm of the connecting rod 3, without affecting each other.

[0045] The use of a boss for partial contact force transmission results in less frictional resistance compared to full-surface bonding, requiring less driving force for unlocking and improving the ease of hydraulic and manual operation. The boss is an independent load-bearing structure, which concentrates the force and facilitates reinforcement and thickening, improving the wear resistance and life of the rocker arm and reducing wear and jamming failures caused by long-term reciprocating operation.

[0046] Combination Figure 5 Preferably, the locking position of the locking hook 1 under the action of the torsion spring 2 is designed with an offset from the center of the rotating shaft. The positive pressure exerted on the locking hook 1 by the locked target (locking ring) will generate a counterclockwise self-locking torque on the rotating shaft of the locking hook 1 in the same direction as the torsion spring 2, forming a double locking torque of torsion spring 2 + external load.

[0047] Preferably, the hydraulic drive mechanism further includes a hydraulic unlocking actuator 7, the piston rod of which is hinged to the normal unlocking rocker arm 5. When the piston rod of the hydraulic unlocking actuator 7 retracts, it pulls the normal unlocking rocker arm 5 to rotate, thereby ensuring that the tension spring 10 is only subjected to axial force. The tension spring 10 provides the restoring force for the handle assembly 14 and the steel cable 13.

[0048] It uses a standard hydraulic actuator as a power source, is compatible with the existing airborne hydraulic system of the aircraft, requires no additional energy source, and has strong versatility; the linear telescopic motion is converted into the rocker arm rotation motion, with stable force transmission and large output torque, which can meet the unlocking requirements of heavy load locks.

[0049] Preferably, the mechanical drive mechanism further includes a pull rod 8, a multi-stage conversion module, a steel cable 13, and a handle assembly 14.

[0050] One end of the lever 8 is connected to the emergency unlocking rocker arm 6, and the other end is connected to the multi-stage conversion module. The multi-stage conversion module can perform force conversion and operating stroke matching. The steel cable 13 is connected between the handle assembly 14 and the multi-stage conversion module. The handle assembly 14 is used for manual operation to pull the steel cable 13 and the lever 8.

[0051] The steel cable 13 remote transmission allows the emergency operating handle to be placed in easily accessible areas such as the cockpit or the outside of the machine body, without being restricted by the installation position of the lock body; the multi-level conversion module can adjust the output force and stroke to adapt to the human-machine operation indicators of different models, reduce the manual unlocking operation force, and improve the operating comfort.

[0052] Preferably, the multi-stage conversion module includes a multi-stage lever arm conversion rocker arm 9, a tension spring 10, a spring connecting rod 11, and a spring support 12; the multi-stage lever arm conversion rocker arm 9 is provided with a first sector-shaped component connected to the steel cable 13, and the multi-stage lever arm conversion rocker arm 9 is provided with three connection interfaces for force value conversion and operating stroke matching, which can realize three different force transmission ratios; the tension spring 10 is connected between the multi-stage lever arm conversion module and the spring connecting rod 11, the spring connecting rod 11 is connected to the spring support 12, and the spring support 12 is fixed to the machine body structure; the tension spring 10 can drive the multi-stage lever arm conversion rocker arm 9 to reset.

[0053] The three-position connection interface allows for switching between three force ratios, flexibly matching the handle operating force and operating stroke required by different models, resulting in a high degree of product versatility; the independent reset spring 10 provides reset tension specifically for the entire mechanical path of the steel cable 13, handle, and multi-stage rocker arm, so that all components automatically return to the initial locked position after the handle is released, without the need for manual repositioning.

[0054] Preferably, the first sector component includes a sector wheel with a cable groove and two connecting lugs, with the steel cable 13 connected within the cable groove. The steel cable 13 is confined by the groove, preventing slippage and disengagement during transmission, ensuring accurate and uninterrupted unlocking stroke; the arc groove of the sector wheel smoothly converts the linear tension of the steel cable 13 into the rotational torque of the rocker arm, resulting in uniform force distribution and reducing localized wear on the steel cable 13.

[0055] Preferably, the multi-stage lever arm conversion rocker arm 9 and the tension spring 10 are connected through an ear hole; the ear hole hinge is a flexible connection, and the angle of the tension spring 10 can be adaptively and finely adjusted during the rocker arm swing, without generating additional bending stress.

[0056] Preferably, the spring connecting rod 11 is equipped with a bearing and connected to the spring support 12, and the spring connecting rod 11 can rotate around the spring support 12. The bearing enables unobstructed rotation, and the connecting rod 3 rotates synchronously with the spring 10 when it swings, ensuring that the spring 10 is only subjected to axial tension throughout the entire process, thus eliminating bending moment and shear force.

[0057] Preferably, the handle assembly 14 includes a handle and a second sector member fixedly connected to the handle. The second sector member is connected to the steel cable 13, and the handle is rotatably connected to the machine body structure. The sector member converts the rotational motion of the handle into a linear tension force on the steel cable 13, resulting in smooth torque transmission and a smooth operating feel.

[0058] The overall movements are as follows:

[0059] During normal unlocking, the piston rod of the hydraulic unlocking actuator 7 retracts, driving the normal unlocking rocker arm 5 to rotate. The boss 5-1 of the normal unlocking rocker arm 5 pushes the connecting rod rocker arm 4 and the connecting rod 3, ultimately pushing the lock hook 1 to rotate and release the locked target. Throughout the process, the emergency unlocking rocker arm 6 remains stationary under the action of the tension spring 10. The boss 6-1 on the emergency unlocking rocker arm 6 is separated from the boss 4-1 on the connecting rod rocker arm 4 and does not affect each other.

[0060] When the normal unlocking task is completed, the hydraulic unlocking actuator 7 returns to the oil level, and the torsion spring 2 on the lock hook 1 will drive the lock hook 1 back to the initial position, while also helping the piston rod of the hydraulic unlocking actuator 7 to reset.

[0061] During emergency unlocking, the handle assembly 14 is pulled upwards. The handle 14 pulls the steel cable 13 and rotates the multi-stage lever arm conversion rocker arm 9, which in turn pulls the lever 8 and drives the emergency unlocking rocker arm 6. The boss 6-1 on the emergency unlocking rocker arm 6 pushes the connecting rod rocker arm 4 and the connecting rod 3, ultimately pushing the lock hook 1 to rotate and release the locked target. Throughout the process, the normal unlocking rocker arm 5 remains stationary under the action of the hydraulic unlocking actuator 7. The boss 5-1 on the normal unlocking rocker arm 5 and the boss 4-1 on the connecting rod rocker arm 4 are separated and do not affect each other.

[0062] After the emergency unlocking operation is completed, the tension spring 10 connected to the multi-stage lever arm conversion rocker arm 9 retracts and drives the steel cable 13 and handle assembly 14 to return to the initial state. At the same time, the torsion spring 2 on the lock hook 1 will drive the lock hook 1 to return to the initial position.

[0063] In summary, this application has the following advantages:

[0064] It adopts a coaxial three rocker arm + boss abutment separation core structure, and physically decouples the two sets of force transmission paths for normal hydraulic unlocking and mechanical emergency unlocking: when hydraulically unlocking, the mechanical path components are stationary, and when manually emergency unlocking, the hydraulic path components are stationary. The two sets of actions do not interfere with each other, completely eliminating the linkage jamming and mis-locking risks caused by the traditional shared force transmission mechanism.

[0065] The hydraulic passage relies on the separation transmission of the boss. Pressure fluctuations and impact loads in the airborne hydraulic system can only slightly drive the actuator cylinder to extend and retract, and cannot push the locking hook to complete the unlocking. This eliminates unauthorized unlocking from the root of the mechanical structure and meets the high-safety-level locking requirements of the aircraft.

[0066] Hydraulic and mechanical systems are redundant backups for each other. In the event of hydraulic power failure, the lock can be unlocked using a purely mechanical steel cable handle. A single path failure will not cause the lock mechanism to fail completely, providing dual safety redundancy.

[0067] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A dual-path self-resetting locking device capable of both hydraulic and mechanical actuation, characterized in that, Includes a hydraulic drive mechanism, a mechanical drive mechanism, and a locking module; The hydraulic drive mechanism is connected to the locking module and is capable of hydraulic unlocking; the mechanical drive mechanism is connected to the locking module and is capable of emergency unlocking. The locking module includes a locking hook (1), a torsion spring (2), a connecting rod (3), and a first rocker arm (4); the locking hook (1) is connected to the body structure via a rotating shaft, one end of the torsion spring (2) is fixed to the body structure, and the other end is attached to the locking hook (1); the locking hook (1) tends to lock under the action of the torsion spring (2); One end of the connecting rod (3) is hinged to the lock hook (1), and the other end is connected to the first rocker arm (4); the hydraulic drive mechanism includes a normal unlocking rocker arm (5), and the mechanical drive mechanism includes an emergency unlocking rocker arm (6). The first rocker arm (4), the normal unlocking rocker arm (5), and the emergency unlocking rocker arm (6) are coaxially connected to the machine body structure. The normal unlocking rocker arm (5) and the emergency unlocking rocker arm (6) abut or separate from the first rocker arm (4) in the circumferential direction on the same axis. When abutting, the normal unlocking rocker arm (5) or the emergency unlocking rocker arm (6) can drive the first rocker arm (4) to rotate under power drive. When the normal unlocking rocker arm (5) comes into contact with the first rocker arm (4), the emergency unlocking rocker arm (6) separates from the first rocker arm (4); when the emergency unlocking rocker arm (6) comes into contact with the first rocker arm (4), the normal unlocking rocker arm (5) separates from the first rocker arm (4).

2. The dual-path self-resetting locking device capable of both hydraulic and mechanical drive as described in claim 1, characterized in that, The first rocker arm (4) is provided with a first boss (4-1), the normal unlocking rocker arm (5) is provided with a second boss (5-1), and the stress unlocking rocker arm is provided with a third boss (6-1). The second boss (5-1) and the third boss (6-1) are located above the first boss (4-1) and abut or separate from the first boss (4-1) in the circumferential direction on the same axis.

3. The dual-path self-resetting locking device capable of both hydraulic and mechanical drive as described in claim 2, characterized in that, The locking position of the hook (1) under the action of the torsion spring (2) is designed with an offset from the center of the rotating shaft.

4. The dual-path self-resetting locking device capable of both hydraulic and mechanical drive as described in claim 1, characterized in that, The hydraulic drive mechanism also includes a hydraulic unlocking actuator (7), the piston rod of which is hinged to the normal unlocking rocker arm (5). When the piston rod of the hydraulic unlocking actuator (7) retracts, it pulls the normal unlocking rocker arm (5) to rotate.

5. The dual-path self-resetting locking device capable of both hydraulic and mechanical drive as described in claim 1, characterized in that, The mechanical drive mechanism also includes a pull rod (8), a multi-stage conversion module, a steel cable (13), and a handle assembly (14); One end of the lever (8) is connected to the emergency unlocking rocker arm (6), and the other end is connected to the multi-stage conversion module. The multi-stage conversion module can perform force conversion and operation stroke matching. The steel cable (13) is connected between the handle assembly (14) and the multi-stage conversion module. The handle assembly (14) is used for manual operation to pull the steel cable (13) and the lever (8).

6. The dual-path self-resetting locking device capable of both hydraulic and mechanical drive as described in claim 5, characterized in that, The multi-stage conversion module includes a multi-stage lever arm conversion rocker arm (9), a tension spring (10), a spring connecting rod (11), and a spring support (12); the multi-stage lever arm conversion rocker arm (9) is provided with a first sector-shaped component connected to the steel cable (13), and the multi-stage lever arm conversion rocker arm (9) is provided with three connection interfaces for force value conversion and operation stroke matching; the tension spring (10) is connected between the multi-stage lever arm conversion module and the spring connecting rod (11), the spring connecting rod (11) is connected to the spring support (12), and the spring support (12) is fixed to the machine body structure; the tension spring (10) can drive the multi-stage lever arm conversion rocker arm (9) to reset.

7. The dual-path self-resetting locking device capable of both hydraulic and mechanical drive as described in claim 6, characterized in that, The first sector component includes a sector wheel with a cable groove and two connecting lugs, and the steel cable (13) is connected in the cable groove.

8. The dual-path self-resetting locking device capable of both hydraulic and mechanical drive as described in claim 6, characterized in that, The multi-stage lever arm conversion rocker arm (9) is connected to the tension spring (10) through an ear hole.

9. The dual-path self-resetting locking device capable of both hydraulic and mechanical drive as described in claim 6, characterized in that, The spring link (11) is equipped with a bearing and connected to the spring support (12), and the spring link (11) is rotatable about the spring support (12).

10. The dual-path self-resetting locking device capable of both hydraulic and mechanical drive as described in claim 6, characterized in that, The handle assembly (14) includes a handle and a second sector member fixedly connected to the handle. The second sector member is connected to a steel cable (13), and the handle is rotatably connected to the body structure.

Images