Error-proof handle assembly for helicopter rotor brake

Abstract

The utility model belongs to the technical field of rotor braking system design, and discloses an error-proof handle assembly for helicopter rotor braking, which comprises a handle support, an annular core, a handle, a lock rod, a spring and a trigger, the handle support is of a plate-shaped structure, a through hole is formed in the middle, the annular core is fixed in the through hole, and the axis of the annular core is parallel to the plane where the handle support is located. One end of the handle sleeves the annular core and rotates around the annular core; a limiting hole is formed in the annular core; a lock rod is arranged in the handle, one end of the lock rod is connected with the handle through a spring, and the other end of the lock rod penetrates out of the handle and enters a limiting hole of the annular core. The trigger is connected with the lock rod and penetrates out of the handle from the side face of the handle. The trigger drives the lock rod to be disengaged from the limiting hole or inserted into the limiting hole. The handle sleeves one end of the annular core and is connected with a steel cable through a fork lug; the steel cable is connected with a rotor brake.

Description

Technical Field

[0001] The utility model belongs to the technical field of rotor brake system design, and particularly relates to an anti-error handle assembly for helicopter rotor brakes. Background Art

[0002] The rotor brake system of a certain type of helicopter is an independent, manually operated brake system. After the engine stops and the rotor speed drops below the specified speed, the pilot can operate the rotor brake handle to transmit the braking force to the rotor brake device, so that the rotor stops rotating quickly. It can also be used to lock the rotor during helicopter ground maintenance and mooring.

[0003] The helicopter needs to perform brake operations on the rotor during and after shutdown. Generally, using the hydraulic pressure of the on-board hydraulic system as the operating force of the rotor brake device is a convenient and reliable method. However, hydraulic control will make the entire hydraulic system more complex, and it requires 2 handles, 1 safety handle and 1 operating handle, thus reducing the reliability of the entire hydraulic system. Summary of the Utility Model

[0004] Purpose of the utility model: To propose an anti-error handle assembly for helicopter rotor brakes. Using an independent, manually controlled rotor brake system is more weight-saving compared to hydraulic control, and it uses 1 handle for operation, with better anti-error performance, higher reliability, and more convenient operation.

[0005] Technical Solution

[0006] An anti-error handle assembly for helicopter rotor brakes includes: a handle support, an annular core, a handle, a locking rod, a spring, and a trigger;

[0007] The handle support is a plate-like structure with a through hole in the middle. The annular core is fixed inside the through hole, and the axis of the annular core is parallel to the plane where the handle support is located;

[0008] One end of the handle is sleeved on the annular core and rotates around the annular core; there is a limiting hole on the annular core;

[0009] The inside of the handle is hollow, and a locking rod is arranged inside the handle. One end of the locking rod is connected to the handle through a spring, and the other end passes through the handle and enters the limiting hole of the annular core;

[0010] The trigger is connected to the locking rod and passes through the side of the handle to protrude from the handle. The locking rod is driven by the trigger to be disengaged from or inserted into the limiting hole;

[0011] One end of the handle sleeved on the annular core is also connected to a steel cable through a fork ear, and the steel cable is connected to the rotor brake.

[0012] Further, the end of the handle away from the handle support is a flat oval structure, and the included angle between the major axis of the oval structure and the handle body is 150°. Through weight reduction and ergonomic design, it is convenient for the driver to manually operate and apply force.

[0013] Further, the annular core is a hollow cylinder, and two limiting holes are provided along the radial direction. When the locking rod is inserted into the two limiting holes, it corresponds to the two states of rotor braking and freedom respectively.

[0014] Further, the included angle between the axes of the two limiting holes is between 30° and 90°. It is convenient to distinguish the two rotor states.

[0015] Further, the handle support is a hexagonal structure and is installed on the top inside the cockpit through bolts.

[0016] Further, in the normal state, the spring is in a compressed state, and the locking rod is pressed into the limiting hole by the elastic force of the spring.

[0017] In summary, the beneficial effects of the present utility model are as follows:

[0018] An anti-error handle for helicopter rotor braking realizes the generation of pressure in the manual rotor braking system and can maintain the braking pressure in the rotor braking system. Before the handle is pulled, the driver needs to manually operate the trigger to drive the locking rod to move out of the limiting hole, thus avoiding misoperation. Compared with hydraulic control, it is more weight-saving, and only 1 handle is used for operation, with better anti-error performance, higher reliability, and more convenient operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the internal structure of the anti-error handle assembly.

[0020] Figure 2 It is a schematic diagram of the overall external shape of the anti-error handle assembly.

[0021] 1. Handle, 2. Spring, 3. Locking rod, 4. Handle support, 5. Fork ear, 6. Locking piece, 7. Annular core, 8. Trigger. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] An anti-error handle assembly for helicopter rotor braking, as shown in Figure 1 and Figure 2As shown in the figure, the handle assembly consists of a handle, a spring, a trigger, a locking lever, a handle support, an annular core and a fork ear, etc., and can be installed on the top of the helicopter cockpit through bolts. The handle and the annular core are installed on the support through two locking pieces. The annular core is fixed and has two limit holes. The handle can rotate around the annular core. The locking lever is installed inside the handle. One end passes through the annular core through the limit hole, and the other end is connected to the trigger. The limit hole catches the locking lever, so that the handle cannot be pulled when it is in the locked position. The trigger compresses the spring under the manual operation of the driver, drives the locking lever to move out of the limit hole, and enables the handle to be pulled to avoid misoperation. The fork ear is used to connect the steel cable and transmit the braking force to the rotor brake device.

Claims

1. An anti-misoperation handle assembly for a helicopter rotor brake, characterized in that: The component includes: a handle support, an annular core, a handle, a locking rod, a spring, and a trigger; The handle support is in a plate-like structure, with a through hole in the middle. The annular core is fixed inside the through hole, and the axis of the annular core is parallel to the plane where the handle support is located; One end of the handle is sleeved on the annular core and rotates around the annular core; there are limit holes on the annular core; The inside of the handle is hollow, and a locking rod is arranged inside the handle. One end of the locking rod is connected to the handle through a spring, and the other end passes through the handle and enters the limit hole of the annular core; The trigger is connected to the locking rod and passes through the side of the handle. The locking rod is driven by the trigger to be withdrawn from or inserted into the limit hole; One end of the handle sleeved on the annular core is also connected to a cable through a fork ear, and the cable is connected to the rotor brake.

2. The component according to claim 1, wherein: The end of the handle away from the handle support is a flat oval structure, and the included angle between the long axis of the oval structure and the handle body is 150°.

3. The component according to claim 2, wherein: The annular core is a hollow cylinder, and there are two limit holes arranged along the radial direction.

4. The component according to claim 3, wherein: The included angle between the axes of the two limit holes is between 30° and 90°.

5. The component according to claim 3, wherein: The handle support is in a hexagonal structure and is installed on the top inside the cockpit through bolts.

6. The component according to claim 1, characterized in that: In the normal state, the spring is in a compressed state, and the locking rod is pressed into the limit hole by the elastic force of the spring.

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