A kind of auxiliary tool for Bombardier Q400 aircraft propeller disassembly and maintenance

Abstract

A kind of auxiliary tool for Bombardier Q400 aircraft propeller disassembly and maintenance, it is related to aircraft maintenance tool field, after propeller is fixed to rotating assembly, propeller is rotated to make rotating shaft rotate in shaft sleeve, the blade on propeller that needs maintenance is rotated to vertical upward position, then locking mechanism is used to lock rotating shaft relative to shaft sleeve, prevent propeller from rotating, the staff on operating platform can carry out construction to the blade that needs maintenance.The whole operation process propeller is all fixed to the auxiliary tool, and can rotate freely, the whole auxiliary tool can be moved to specified station by walking mechanism, realize transport function, improve the maintenance efficiency of Bombardier Q400 aircraft propeller, reduce operation risk.

Description

Technical Field

[0001] This utility model relates to the field of aircraft maintenance tools, specifically to an auxiliary tooling for the disassembly, assembly, and maintenance of the propeller of a Bombardier Q400 aircraft. Background Technology

[0002] The propeller of the Bombardier Q400 aircraft is a core component, with a diameter of approximately 4.11 meters and a weight of about 340 kilograms. Each propeller consists of six blades, making it large and structurally complex. During scheduled maintenance, the propellers need to be vertically removed from both sides of the aircraft's wings, an operation fraught with high safety risks. Furthermore, the storage and maintenance of the removed propellers present the following challenges: (1) The propeller is large in size and has limited storage space, which can easily lead to instability or collision damage.

[0003] (2) When maintaining the propeller, it is necessary to rotate the propeller frequently to check different parts, but the traditional method cannot achieve safe and free rotation.

[0004] (3) Transportation is difficult and accidents are likely to occur during the movement.

[0005] Therefore, there is an urgent need for an auxiliary tooling to simulate the vertical suspension state of a propeller on an aircraft, supporting free rotation, stable positioning, and convenient transportation, so as to ensure a safe and efficient maintenance process. Summary of the Invention

[0006] In order to overcome the shortcomings of the above technologies, this utility model provides an auxiliary tooling for the disassembly, assembly, and maintenance of propellers for Bombardier Q400 aircraft, which allows the propeller to rotate freely and move easily, thereby improving work efficiency.

[0007] The technical solution adopted by this utility model to overcome its technical problem is: An auxiliary tooling for the disassembly, assembly, and maintenance of the propeller of a Bombardier Q400 aircraft, comprising: The frame has an operating platform at its upper end, which is horizontally positioned, and a traveling mechanism at its lower end. A rotating assembly, mounted on the frame, is used to connect the propeller; The rotating component includes: A base is mounted on a frame, and a bushing I is fixed on the base. The axis of the bushing I is horizontally arranged in the front-to-back direction. A rotating shaft is rotatably mounted in bushing I. A flange is coaxially connected to the head end of the shaft. The flange has through holes spaced circumferentially, matching the number and position of the screws on the propeller. The propeller screws are inserted into the corresponding through holes and locked in place by nuts. A locking mechanism is provided on bushing I and is used to lock and fix the rotating shaft relative to bushing I.

[0008] Furthermore, the aforementioned walking mechanism includes casters installed at the four corners of the lower end of the frame.

[0009] To improve ease of use, a ladder is also included on the frame, with the upper end of the ladder flush with the operating platform.

[0010] To enhance safety, the aforementioned operating platform is equipped with guardrail I on its side.

[0011] To improve safety, guardrails II are installed on both sides of the aforementioned ladder.

[0012] To improve safety, the system also includes N braking assemblies mounted on the frame, where N is a positive integer greater than or equal to 1. Each braking assembly includes a sleeve fixed to the frame and a screw screwed into the sleeve. The axis of the screw screw is arranged vertically, a brake pad is mounted at the lower end of the screw screw, and a handwheel is mounted at the upper end of the screw screw.

[0013] Furthermore, the aforementioned locking mechanism includes a plurality of pin holes evenly spaced along the circumferential direction on the bushing I and a plurality of locking holes evenly spaced along the circumferential direction on the rotating shaft. The axis of the pin is arranged in the vertical direction. After passing through the pin hole, the pin is inserted into the locking hole. The head end of the pin is provided with a handle.

[0014] To improve service life, bushing II is also included, which is located between bushing I and the rotating shaft.

[0015] To prevent the shaft from detaching from bushing I, a slot is provided on bushing I and a limiting groove is provided around the shaft in the circumferential direction. The stop block is fixed to bushing I by bolts, the stop block is embedded in the slot and its lower end is slidably inserted into the limiting groove.

[0016] To improve service life, a bearing bush is also included, which is located between the limit groove and the stop block.

[0017] The beneficial effects of this invention are as follows: After the propeller is fixed to the rotating assembly, rotating the propeller causes the shaft to rotate within bushing I, thus rotating the blades on the propeller that need maintenance to a vertically upward position. Then, a locking mechanism locks the shaft relative to bushing I to prevent the propeller from rotating. Workers standing on the operating platform can then perform maintenance on the blades. Throughout the entire operation, the propeller is fixed to this auxiliary fixture and can rotate freely. The entire auxiliary fixture can be moved to a designated workstation via a traveling mechanism, achieving a transportation function. This improves the maintenance efficiency of the Bombardier Q400 aircraft propeller and reduces operational risks. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2This is a structural diagram of the brake pad portion of this utility model; Figure 3 This is a three-dimensional structural diagram of the rotating component of this utility model; Figure 4 This is a front sectional view of the rotating component of this utility model; Figure 5 This is a schematic diagram of the propeller installation state of this utility model. Figure I ; Figure 6 This is a schematic diagram of the propeller installation state of this utility model. Figure II ; In the diagram: 1. Frame; 2. Casters; 3. Operating platform; 4. Ladder; 5. Rotating assembly; 6. Guardrail I; 7. Guardrail II; 8. Brake pad; 9. Screw sleeve; 10. Screw; 11. Handwheel; 12. Propeller; 13. Nut; 51. Base; 52. Bushing I; 53. Flange; 54. Through hole; 55. Stop block; 56. Bolt; 57. Pin; 58. Handle; 59. Shaft; 510. Bushing II; 511. Limit groove; 512. Bearing shell; 513. Locking hole; 514. Pin hole. Detailed Implementation

[0019] The following is in conjunction with the appendix Figure 1 To be continued Figure 6 The present invention will be further described below.

[0020] An auxiliary tooling for the disassembly, assembly, and maintenance of a propeller for a Bombardier Q400 aircraft includes: a frame 1 with an operating platform 3 mounted on its upper end, the operating platform 3 being horizontally positioned, and a traveling mechanism mounted on the lower end of the frame 1; a rotating assembly 5 mounted on the frame 1 for connecting a propeller 12; the rotating assembly 5 includes: a base 51 mounted on the frame 1, with a bushing I 52 fixed on the base 51, the axis of the bushing I 52 being horizontally positioned along the front-rear direction; a rotating shaft 59 rotatably mounted in the bushing I 52, the head end of the rotating shaft 59 being coaxially connected to a flange 53, the flange 53 having through holes 54 spaced along the circumferential direction matching the number and position of the screws on the propeller 12, the screws of the propeller 12 being inserted into the corresponding through holes 54 and locked in place by nuts 13; and a locking mechanism mounted on the bushing I 52 for locking the rotating shaft 59 relative to the bushing I 52. The entire auxiliary tooling is moved to an open area near the aircraft propeller via a traveling mechanism. A gantry crane is used to lift the propeller 12, removed from the Bombardier Q400 aircraft, to the rotating assembly 5. The screws at the rear end of the propeller 12 are inserted into the corresponding through holes 54 of the flange 53 and then locked in place using nuts 13, thus securing the propeller 12 to the rotating assembly 5. The propeller 12 is then rotated, causing the shaft 59 to rotate within the bushing I 52, rotating the blades on the propeller 12 that require maintenance to a vertically upward position. A locking mechanism is then used to lock the shaft 59 relative to the bushing I 52, preventing the propeller 12 from rotating. Workers standing on the operating platform 3 can then perform maintenance on the blades requiring maintenance. After the blade is finished, the locking mechanism is released, the shaft 59 is rotated again, and the above actions are repeated until all blades on the propeller 12 are maintained. Throughout the entire operation, the propeller 12 is fixed to the auxiliary fixture and can rotate freely. The entire auxiliary fixture can be moved to the designated work position through the walking mechanism to realize the transportation function, which improves the maintenance efficiency of the Bombardier Q400 aircraft propeller 12 and reduces the operational risk.

[0021] In one embodiment of this utility model, the walking mechanism includes casters 2 respectively installed at the four corners of the lower end of the frame 1. By providing casters 2, this auxiliary tooling can move and turn easily, with a simple structure and stable and reliable operation.

[0022] In one embodiment of this utility model, a ladder 4 is further provided on the frame 1, with the upper end of the ladder 4 flush with the operating platform 3. Workers can climb onto the operating platform 3 via the ladder 4, improving operational convenience.

[0023] In one embodiment of this utility model, a guardrail I 6 is provided on the side of the operating platform 3. Guardrails II 7 are provided on both sides of the ladder 4. The guardrail I 6 can improve the safety of workers when performing construction on the operating platform 3, and the guardrails II 7 can improve the safety of workers when climbing the ladder 4.

[0024] In one embodiment of this utility model, N braking assemblies are further included on the frame 1, where N is a positive integer greater than or equal to 1. Each braking assembly includes a threaded sleeve 9 fixed to the frame 1 and a screw 10 screwed into the threaded sleeve 9. The axis of the screw 10 is vertically oriented, a brake pad 8 is mounted at the lower end of the screw 10, and a handwheel 11 is mounted at the upper end of the screw 10. When the entire auxiliary fixture is moved into place, the screw 10 is driven to rotate via the handwheel 11. Since the screw 10 and the threaded sleeve 9 are connected by a threaded transmission, the rotation of the screw 10 drives the brake pad 8 to move downwards, causing the brake pad 8 to contact the ground. The friction with the ground is used to fix the entire frame 1 relative to the ground.

[0025] In one embodiment of this utility model, the locking mechanism includes a plurality of pin holes 514 evenly spaced along the circumferential direction on the bushing I 52 and a plurality of locking holes 513 evenly spaced along the circumferential direction on the rotating shaft 59. The axis of the pin shaft 57 is arranged in the vertical direction. The pin shaft 57 passes through the pin holes 514 and is inserted into the locking holes 513. A handle 58 is provided at the head end of the pin shaft 57. When it is necessary to lock the position of the propeller 12, the handle 58 drives the pin shaft 57 to be inserted into a pin hole 514 and rotated into a locking hole 513 with the same axis as the pin hole 514, thereby locking and fixing the rotating shaft 59 relative to the bushing I 52, that is, fixing the position of the propeller 12.

[0026] In one embodiment of this utility model, a bushing II 510 is further included, which is disposed between bushing I 52 and rotating shaft 59. Preferably, bushing II 510 is made of tin bronze. When rotating shaft 59 rotates, its surface makes sliding frictional contact with the inner surface of bushing II 510. Since tin bronze has excellent wear resistance, the service life of the entire auxiliary tooling is improved.

[0027] In one embodiment of this utility model, a retaining groove is further provided on the bushing I 52 and a limiting groove 511 is provided around the rotating shaft 59 in the circumferential direction. A stop block 55 is fixed to the bushing I 52 by bolts 56. The stop block 55 is embedded in the retaining groove and its lower end is slidably inserted into the limiting groove 511. By inserting the stop block 55 into the limiting groove 511 of the rotating shaft 59, the rotating shaft 59 and the bushing I 52 can be locked in the axial direction, preventing the rotating shaft 59 from disengaging from the bushing I 52.

[0028] In one embodiment of this utility model, a bearing bush 512 is further included, disposed between the limiting groove 511 and the stop block 55. Preferably, the bearing bush 512 is made of tin bronze. When the rotating shaft 59 rotates, its surface makes sliding frictional contact with the inner surface of the bearing bush 512. Since tin bronze has excellent wear resistance, the service life of the entire auxiliary tooling is improved.

[0029] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An auxiliary tooling for the disassembly, assembly, and maintenance of a propeller for a Bombardier Q400 aircraft, characterized in that, include: The frame (1) has an operating platform (3) at its upper end, the operating platform (3) is horizontally positioned, and the frame (1) has a walking mechanism at its lower end. Rotating assembly (5), mounted on frame (1), is used to connect propeller (12); The rotating component (5) includes: The base (51) is mounted on the frame (1), and a bushing I (52) is fixed on the base (51). The axis of the bushing I (52) is set horizontally in the front-back direction. A rotating shaft (59) is rotatably mounted in bushing I (52). A flange (53) is coaxially connected to the head end of the rotating shaft (59). The flange (53) has through holes (54) spaced circumferentially, matching the number and position of the screws on the propeller (12). The screws of the propeller (12) are inserted into the corresponding through holes (54) and then locked in place by nuts (13). A locking mechanism is provided on bushing I (52) to lock and fix the rotating shaft (59) relative to bushing I (52).

2. The auxiliary tooling for disassembling and maintaining the propeller of a Bombardier Q400 aircraft according to claim 1, characterized in that: The walking mechanism includes casters (2) installed at the four corners of the lower end of the frame (1).

3. The auxiliary tooling for disassembling and maintaining the propeller of a Bombardier Q400 aircraft according to claim 1, characterized in that: It also includes a ladder (4) mounted on the frame (1), the upper end of which is flush with the operating platform (3).

4. The auxiliary tooling for disassembling and maintaining the propeller of a Bombardier Q400 aircraft according to claim 1, characterized in that: The side of the operating platform (3) is provided with guardrail I (6).

5. The auxiliary tooling for disassembling and maintaining the propeller of a Bombardier Q400 aircraft according to claim 3, characterized in that: Guardrails II (7) are provided on both sides of the ladder (4).

6. The auxiliary tooling for disassembling and maintaining the propeller of a Bombardier Q400 aircraft according to claim 1, characterized in that: It also includes N brake assemblies installed on the frame (1), where N is a positive integer greater than or equal to 1. The brake assembly includes a screw sleeve (9) fixed on the frame (1) and a screw (10) screwed into the screw sleeve (9). The axis of the screw (10) is set in the vertical direction. A brake pad (8) is installed at the lower end of the screw (10), and a handwheel (11) is installed at the upper end of the screw (10).

7. The auxiliary tooling for disassembling and maintaining the propeller of a Bombardier Q400 aircraft according to claim 1, characterized in that: The locking mechanism includes a plurality of pin holes (514) evenly spaced along the circumferential direction on the bushing I (52) and a plurality of locking holes (513) evenly spaced along the circumferential direction on the rotating shaft (59). The axis of the pin (57) is arranged in the vertical direction. The pin (57) passes through the pin hole (514) and is inserted into the locking hole (513). The head end of the pin (57) is provided with a handle (58).

8. The auxiliary tooling for disassembling and maintaining the propeller of a Bombardier Q400 aircraft according to claim 1, characterized in that: It also includes bushing II (510) which is disposed between bushing I (52) and shaft (59).

9. The auxiliary tooling for disassembling and maintaining the propeller of a Bombardier Q400 aircraft according to claim 1, characterized in that: It also includes a slot on the bushing I (52) and a limiting groove (511) arranged around the rotating shaft (59) in the circumferential direction. The stop block (55) is fixed to the bushing I (52) by bolts (56). The stop block (55) is embedded in the slot and its lower end is slidably inserted into the limiting groove (511).

10. The auxiliary tooling for disassembling and maintaining the propeller of a Bombardier Q400 aircraft according to claim 1, characterized in that: It also includes a bearing bush (512) disposed between the limiting groove (511) and the stop block (55).

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