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CN-119568402-B - Manual locking mechanism that goes up of helicopter front wheel lock

CN119568402BCN 119568402 BCN119568402 BCN 119568402BCN-119568402-B

Abstract

The manual locking and unlocking mechanism for the front wheel lock of the helicopter comprises a manual pin assembly, a connecting cap, a manual rod, a screw, a guide rod, an end cover, a shell and a piston, wherein the piston and the shell are coaxially arranged, the end face of the shell is provided with the end cover, the shell is in threaded connection with the end cover, a through hole is formed in the axial direction of the piston, one end of the piston extending out of the end cover is provided with the connecting cap, the connecting cap is axially provided with the through hole which is communicated with the axial through hole of the piston, the manual rod is slidably arranged in the axial through hole of the connecting cap and the piston, the manual rod is provided with two pin holes in the radial direction, the connecting cap is radially provided with a through hole corresponding to the pin holes, the manual pin assembly can axially limit the manual rod, a boss is arranged on the side face of the connecting cap, the boss is provided with a mounting hole along the axial direction of the connecting cap, the guide rod penetrates through the mounting hole in the blind hole in the shell, and is limited in the radial direction of the connecting cap, and the screw is arranged in the mounting hole.

Inventors

  • Pu Qianwang
  • LIU ZEMIN
  • CHEN RENYI
  • ZHANG WENZHI
  • WANG FEI

Assignees

  • 贵州新安航空机械有限责任公司

Dates

Publication Date
20260505
Application Date
20241118

Claims (6)

  1. 1. A manual locking and unlocking mechanism of a front wheel lock of a helicopter comprises a manual pin assembly (1), a connecting cap (2), a manual rod (3), a screw (4), a guide rod (5), an end cover (8), a shell (9) and a piston, wherein the piston and the shell (9) are coaxially arranged, the end face of the shell (9) is provided with the end cover (8), the shell (9) is in threaded connection with the end cover (8), a through hole is arranged in the axial direction of the piston, one end of the piston extending out of the end cover (8) is provided with the connecting cap (2), the axial direction of the connecting cap (2) is provided with the through hole which is communicated with the axial through hole of the piston, the manual rod (3) is slidably arranged in the axial through hole of the connecting cap (2) and the piston, two pin holes in the radial direction are arranged at the axial through hole of the connecting cap (2), one through hole corresponding to the pin holes is arranged in the radial direction of the connecting cap (2), the manual pin assembly (1) can penetrate through one of the radial through holes of the connecting cap (2) and one pin hole of the manual rod (3) to axially limit the manual rod (3), a boss is arranged on the side face of the connecting cap (2), the boss is arranged in the axial direction of the connecting cap (2) and is provided with a mounting hole (9) corresponding to the guide hole (9) on the connecting cap (2) and penetrates into the axial position of the connecting cap (5), limiting the radial direction of the connecting cap (2), wherein a screw (4) is arranged in the mounting hole to limit the guide rod (5); Manual pin subassembly (1) including pull ring (101), round pin cover (102), round pin pole (103), spring (104), card (105) and steel ball (106), the pull rod is installed on round pin pole (103), and spring (104) suit is on round pin pole (103), and the step up end in upper portion position of round pin pole (103) is down terminal surface butt, be equipped with the fluting along the diameter direction from the centre of a circle on card (105), install card (105) on round pin pole (103) axle through fluting department, card (105) up end and spring (104) lower terminal surface butt, the lower terminal surface of card (105) intermediate position and the step terminal surface laminating of round pin pole (103) lower part position, and in round pin pole (103) were installed to round pin cover (102) inner chamber, make card (105) lower terminal surface and the step up end laminating in round pin cover (102) inner chamber, through-hole and the strip groove of round pin pole (103) axial direction on round pin (107) passed round pin cover (102), and round pin (103) can not deviate from in round pin cover (102) and follow interior axle (102).
  2. 2. The manual locking and unlocking mechanism of the front wheel lock of the helicopter of claim 1, wherein through holes for installing the steel balls (106) are formed in the radial direction of the side wall of the lower portion of the pin sleeve (102), the two steel balls (106) are positioned on two sides of the pin rod (103) and can prevent the pin rod (103) from being separated, and annular avoidance grooves are formed in the positions of the two sides of the pin rod (103) which are positioned on the steel balls (106).
  3. 3. The manual locking and unlocking mechanism for the front wheel lock of the helicopter of claim 1, wherein the pull ring (101) is of an elastic structure.
  4. 4. The manual locking and unlocking mechanism for the front wheel lock of the helicopter of claim 1, wherein the cylindrical pin (107) is in interference fit with the through hole on the pin sleeve (102).
  5. 5. The manual locking and unlocking mechanism for the front wheel lock of the helicopter is characterized in that the connecting cap (2) is connected with the piston through threads.
  6. 6. The manual locking and unlocking mechanism for the front wheel lock of the helicopter, as claimed in claim 1, is characterized in that the piston is positioned between the end cover (8) and the connecting cap (2) and is provided with a stop washer (6) and a nut (7).

Description

Manual locking mechanism that goes up of helicopter front wheel lock Technical Field The invention relates to the technical field of helicopter landing gears, in particular to a manual locking and unlocking mechanism of a front wheel lock of a helicopter. Background The patent document with the bulletin number of CN111532422B discloses a bidirectional hydraulic locking mechanism for the front wheel of the helicopter, wherein a manual rod is connected with a lock rod through a bearing seat, a hydraulic piston is used for pushing the manual rod and the lock rod to move, the lock rod enters the locking mechanism for locking, when hydraulic pressure is removed, the piston returns to an initial position under the action of an unlocking spring but the manual rod does not move, the locking mechanism is in a locking state, when the locking mechanism is unlocked, the piston pushes the manual rod and the lock rod under the action of hydraulic pressure, so that the lock rod is separated from the locking mechanism for unlocking, the hydraulic pressure is removed, the piston returns to the initial position but the manual rod does not generate displacement, the locking mechanism is in an unlocking state, when the manual locking is carried out, the manual rod and the lock rod are driven to move for locking, the manual pin is inserted into the locking mechanism to keep the locking state, and the manual pin is pulled out, and the manual pin is inserted into a radial locking hole and is kept in the locking mechanism. The existing manual locking mechanism is not fixed in direction and inconvenient to operate and is laborious. Disclosure of Invention In order to solve the problems in the background art, the invention provides a manual locking and unlocking mechanism of a front wheel lock of a helicopter. The invention discloses a manual locking and unlocking mechanism of a front wheel lock of a helicopter, which comprises a manual pin assembly, a connecting cap, a manual rod, a screw, a guide rod, an end cover, a shell and a piston, wherein the piston is coaxially arranged with the shell, the end surface of the shell is provided with the end cover, the shell is in threaded connection with the end cover, a through hole is arranged in the axial direction of the piston, one end of the piston extending out of the end cover is provided with the connecting cap, the through hole is communicated with the axial through hole of the piston, the manual rod is slidably arranged in the axial through holes of the connecting cap and the piston, two pin holes in the radial direction are arranged at the axial through holes of the manual rod, one through hole corresponding to the pin holes is arranged in the radial direction of the connecting cap, the manual pin assembly can penetrate through one of the radial through holes of the connecting cap and the pin holes of the manual rod, the manual rod is axially limited, a boss is arranged on the side surface of the connecting cap, the boss is provided with a mounting hole corresponding to the mounting hole on the connecting cap in the axial direction, the shell is provided with a blind hole on the connecting cap, the guide rod penetrates through the mounting hole on the connecting cap to the shell, the blind hole in the connecting cap in the axial direction is limited in the radial direction, and the guide rod is limited in the radial direction. Further, manual round pin subassembly includes pull ring, bush, pin pole, spring, card and steel ball, and the pull rod is installed on the pin pole, and the spring housing is on the pin pole, and the terminal surface butt under the step of upper portion position of spring up end and pin pole, be equipped with along the fluting of diameter direction from the centre of a circle on the card, install the card on the pin pole through fluting department, terminal surface butt under card up end and the spring, the lower terminal surface of card intermediate position and the laminating of the step terminal surface of pin pole lower part position, in the bush inner chamber was installed to the pin pole, the terminal surface laminating was gone up to the step up end in messenger's card down with the bush inner chamber, the cylindric lock passed through hole and the bar groove of pin pole axial direction on the bush, cylindric lock and the epaxial slip of bush and not deviate from in the bush. Further, through holes for installing steel balls are formed in the radial direction of the side wall of the lower portion of the pin sleeve, the two steel balls are located on two sides of the pin rod, the pin rod can be prevented from falling out, and annular avoidance grooves are formed in the positions of the two sides of the pin rod. Further, the pull ring is of an elastic structure. Further, the connecting cap is connected with the piston through threads. Further, the piston is located between the end cap and the connecting cap with a stop washer and nut mounted therebetwe