Dismounting method for bearing of aero-engine of unmanned aerial vehicle

Abstract

The invention discloses a dismounting method for a bearing of an aircraft engine of an unmanned aerial vehicle, and relates to the technical field of aircraft engines of unmanned aerial vehicles. According to the method, a dismounting device is adopted for dismounting the unmanned aerial vehicle aero-engine bearing, and the dismounting device comprises a connecting block, a lifting screw rod and a fixing shaft; connecting parts are symmetrically arranged on the two opposite sides of the connecting block, each connecting part is provided with a connecting piece, and each connecting piece can be controlled to move away from or close to the connecting block on the corresponding connecting part; and a fixed shaft is arranged on each connecting piece. The distance between the fixed shaft on the connecting piece and the lifting screw rod and the axial distance of the fixed shaft are adjusted to adapt to different bearings, the bottom of the lifting screw rod makes contact with the top of a mounting part, the lifting screw rod is rotated to move downwards, and a clamping hook of the fixed shaft drives the bearing to move upwards till the bearing is ejected out; therefore, the bearing of the aero-engine of the unmanned aerial vehicle is disassembled.

Description

Technical Field

[0001] The present invention relates to the technical field of unmanned aerial vehicle (UAV) aero-engines, and particularly to a method for disassembling a bearing of a UAV aero-engine. Background Art

[0002] Most UAVs use internal combustion engines as direct power. The maintenance, servicing, and field repair of the engine are crucial for ensuring the practicality of the equipment. The bearing is an important component for the rotation and load-bearing of the engine main shaft, and is a key component for ensuring the performance of the engine. To extend the service life of the engine and eliminate early failures, it is necessary to regularly repair and replace the engine bearings to improve the reliability of the system.

[0003] The engine bearings are all installed in an interference fit form, and the outer ring of the bearing and the installation hole are in an interference connection. Due to the limitations of the bearing size and installation space, the existing three-jaw puller mechanism cannot penetrate deep into the bearing, and the disassembly of the bearing cannot be achieved. If violent means are used for direct disassembly, it is easy to cause deformation of the installation hole, affecting the installation and fastening of the new bearing and even resulting in part scrapping. Summary of the Invention

[0004] In view of the deficiencies in the above background art, the present invention provides a method for disassembling a bearing of a UAV aero-engine. This structure adjusts the distance between the fixing shaft pitch of the lifting screw on the connecting piece and the axial distance of the fixing shaft to adapt to different bearings, such as hole-mounted bearings or shaft-mounted bearings; the bottom of the lifting screw contacts the top of the installation part, and the lifting screw is rotated to move downward, and the fixing shaft hook drives the bearing to move upward until the bearing is pushed out, thus realizing the disassembly of the bearing of the UAV aero-engine.

[0005] The object of the present invention is to provide a method for disassembling a bearing of a UAV aero-engine. The disassembly device adopted by this method includes: A connecting block, on opposite sides of which connecting parts are symmetrically arranged, and on each connecting part a connecting piece is arranged, and each connecting piece can be controlled to move away from or close to the connecting block on the corresponding connecting part; A lifting screw, vertically penetrating the connecting block and threadedly connected to the connecting block; one end of the lifting screw is provided with a rotating handle; Each connecting piece is provided with a fixing shaft; Each fixing shaft is parallel to the lifting screw; Each fixing shaft can be controlled to move axially on the corresponding connecting piece; On the same end of each fixing shaft, a fixing shaft hook is provided; Wherein, the fixing shaft hook is arranged on the side away from the handle; A method for disassembling the bearing of an unmanned aerial vehicle aeroengine using a disassembly device, comprising the following steps: Adjust each connecting piece to move to a suitable distance from the connecting block, where this distance is determined according to the bearing to be disassembled; Adjust the axial distance between the two fixed shafts and, by rotation, make the hooks of the two fixed shafts symmetrically engage with the bottom of the bearing to be removed; Rotate the lifting screw through the handle so that the lifting screw tightly abuts against the part where the bearing is installed; Continue to rotate the lifting screw so that the hook of the fixed shaft drives the bearing to move in the opposite direction of the force applied to the lifting screw until the bearing is ejected; Among them, the bearing to be disassembled includes a hole-mounted bearing or a shaft-mounted bearing.

[0006] Preferably, for the method of disassembling a hole-mounted bearing, it includes: First, place the fixed shaft of the disassembly device inside the bearing to be removed; Adjust the direction and position of the fixed shaft so that the hook of the fixed shaft engages with the bottom of the bearing; Rotate the lifting screw through the handle so that the bottom of the lifting screw contacts the inner wall of the installation part; Continue to rotate the lifting screw to move downward, and the hook of the fixed shaft drives the bearing to move upward until the bearing is ejected.

[0007] Preferably, for the method of disassembling a shaft-mounted bearing, it includes: Rotate the lifting screw so that the lifting screw moves up to a suitable position; Adjust the direction and position of the fixed shaft so that the hook of the fixed shaft engages with the bottom of the bearing; Rotate the lifting screw so that the bottom of the lifting screw contacts the top of the installation part; Continue to rotate the lifting screw to move downward, and the hook of the fixed shaft drives the bearing to move upward until the bearing is ejected.

[0008] Preferably, each of the connecting parts includes two parallel cross beams.

[0009] Preferably, each connecting piece is a movable locking box body; two parallel cross beams penetrate through the movable locking box body; among them, one cross beam penetrates through one end of the movable locking box body, and the other cross beam penetrates through the other end of the movable locking box body; The movable locking box body moves along the two parallel cross beams; the movement of the movable locking box body along the two parallel cross beams away from or close to the connecting block is controlled by a first locking mechanism arranged in the movable locking box body.

[0010] Preferably, the first locking mechanism includes: A first locking spring, arranged on one side of the movable locking box body; The first locking wedge is arranged on the first locking spring; a first guiding groove for the movement of the first locking wedge is arranged on one side of the movable locking box body; The radial adjustment button has one end arranged on the first locking wedge and the other end extending outside the movable locking box body to form a first pressing end; Under the pushing action of the first locking spring, the first locking wedge applies pressure to the cross beam along the first guiding groove for locking; When the radial adjustment button is pressed, the first locking wedge is adjusted to loosen the locked cross beam, and the movable locking box body is adjusted to move on the cross beam.

[0011] Preferably, each of the fixed shafts vertically penetrates through the corresponding movable locking box body, and the penetration position is between two parallel cross beams; The axial movement or rotation of the fixed shaft is controlled by a second locking mechanism arranged in the movable locking box body.

[0012] Preferably, the second locking mechanism includes: A second locking spring is arranged at the bottom of the movable locking box body; A second locking wedge is arranged on the second locking spring; a second guiding groove for the movement of the second locking wedge is arranged on the side of the movable locking box body; The axial adjustment button has one end arranged on the second locking wedge and the other end extending outside the movable locking box body to form a second pressing end; Under the pushing action of the second locking spring, the second locking wedge applies pressure to the fixed shaft along the second guiding groove for locking; When the axial adjustment button is pressed, the second locking wedge is adjusted to loosen the locked fixed shaft, and the fixed shaft is adjusted to axially move or rotate along the movable locking box body.

[0013] Preferably, a buffer pad is arranged at one end of the lifting screw rod away from the manual handle.

[0014] Compared with the prior art, the beneficial effects of the present invention are: The present invention provides a method for disassembling a bearing of an unmanned aerial vehicle (UAV) aero-engine. The disassembling device adopted in the present invention is used to disassemble the bearing of the UAV aero-engine. The device is provided with a lifting screw rod, and fixed shafts arranged on connecting pieces on both sides of the lifting screw rod. By adjusting the distance between the fixed shafts on the connecting pieces and the lifting screw rod, as well as the axial distance of the fixed shafts, different bearings can be adapted, such as hole-mounted bearings or shaft-mounted bearings; the bottom of the lifting screw rod is brought into contact with the top of the mounting part, and the lifting screw rod is rotated to move downward, and the fixed shaft hooks drive the bearing to move upward until the bearing is pushed out. Thus, the disassembly of the bearing of the UAV aero-engine is realized. The present invention can realize the non-destructive disassembly of blind-hole interference press-fitted or interference-mounted bearings, and improves the reliability and convenience of engine maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 Schematic diagram of the method for disassembling the bearing of the UAV aero-engine provided by the present invention; Figure 2 Schematic diagram of the adjustment of the fixed shaft; Figure 3 Schematic diagram of the structure of the adjustment button; Figure 4 Schematic diagram of the disassembly of the hole-mounted bearing; Figure 5 Schematic diagram of the disassembly of the shaft-mounted bearing. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] In order to enable those skilled in the art to better understand and implement the technical solution of the present invention, the present invention will be further described below in conjunction with specific embodiments and the accompanying drawings. However, the specific embodiments cited do not limit the present invention.

[0017] The purpose of the present invention is to provide a method for disassembling a bearing of a UAV aero-engine. A bearing disassembly device for a UAV aero-engine provided by the present invention can realize the rapid disassembly of an interference-mounted engine bearing at the blind-hole position, can simultaneously accommodate hole-mounted bearings and shaft-mounted bearings, and can also be used for the disassembly of interference devices with similar structures, greatly improving the operability of engine maintenance.

[0018] To achieve the above object, referring to Figures 1-5 as shown, a method for disassembling a bearing of a UAV aero-engine includes a connecting block 8, a lifting screw rod 4 and a fixed shaft; Connecting parts are symmetrically arranged on opposite sides of the connecting block 8. Each connecting part is provided with a connecting piece, and each connecting piece can be controlled to move away from or close to the connecting block 8 on the corresponding connecting part; The lifting screw rod 4 vertically penetrates through the connecting block 8 and is threadedly connected to the connecting block 8; one end of the lifting screw rod 4 is provided with a rotating handle; A fixed shaft is provided on each connecting member; each of the fixed shafts is parallel to the lifting screw rod 4; Each fixed shaft can be controlled to move axially on the corresponding connecting member; a fixed shaft catch 12 is provided at the same end of each fixed shaft; wherein, the fixed shaft catch 12 is provided on the side away from the handle.

[0019] Each fixed shaft catch 12 is provided on one side of the end of the corresponding fixed shaft; when the fixed shaft catches 12 on the two fixed shafts are adjusted to be oppositely arranged, the shaft-mounted bearing can be disassembled; or when the fixed shaft catches 12 on the two fixed shafts are adjusted to be arranged away from each other, the hole-mounted bearing can be disassembled.

[0020] Each of the connecting parts includes two parallel cross beams 1. In this embodiment, the two connecting parts on both sides of the connecting block are two parallel cross beams; thus, the connecting members on the two connecting parts can be controlled to move away from or close to the connecting block 8.

[0021] Each connecting member is a movable locking box body; the two parallel cross beams 1 penetrate through the movable locking box body; wherein, one cross beam 1 penetrates through one end of the movable locking box body, and the other cross beam 1 penetrates through the other end of the movable locking box body; it can also be understood that the movable locking box body is arranged between the two parallel cross beams, and the two parallel cross beams penetrate through the symmetric ends of the movable locking box body. Thus, the movable locking box body can move on the two parallel cross beams.

[0022] In this embodiment, the connecting members on the two connecting parts on both sides of the connecting block are respectively a first movable locking box body 2 and a second movable locking box body 6; a fixed shaft is provided on each connecting member; that is, a first fixed shaft 3 is provided on the first movable locking box body 2, and a second fixed shaft 5 is provided on the second movable locking box body 6; wherein, the structures of the first movable locking box body 2 and the second movable locking box body 6 are exactly the same. At the same time, the setting of each fixed shaft is also the same. The following descriptions of the setting of the movable locking box body and the fixed shaft are applicable to both the first movable locking box body 2 and the second movable locking box body 6, as well as the first fixed shaft 3 and the second fixed shaft 5.

[0023] The movable locking box body moves along the two parallel cross beams 1; the first locking mechanism provided in the movable locking box body controls the movable locking box body to move away from or close to the connecting block 8 along the two parallel cross beams 1.

[0024] Each of the fixed shafts vertically penetrates through the corresponding moving locking box body, and the penetration position is between two horizontally arranged cross beams 1; the second locking mechanism arranged in the moving locking box body controls the axial movement or rotation of the fixed shaft.

[0025] In order to enable the moving locking box body to move on the cross beam and be locked in time, the first locking mechanism includes: A first locking spring, arranged on one side of the moving locking box body; A first locking wedge block, arranged on the first locking spring; a first guiding groove for the movement of the first locking wedge block is arranged on one side of the moving locking box body; A radial adjustment button 11, one end of which is arranged on the first locking wedge block and the other end extends outside the moving locking box body to form a first pressing end; Under the pushing action of the first locking spring, the first locking wedge block applies pressure to the cross beam along the first guiding groove to perform locking; When the radial adjustment button is pressed, the first locking wedge block is adjusted to loosen the locked cross beam, and the moving locking box body is adjusted to move on the cross beam.

[0026] In order to enable the fixed shaft to axially move or rotate along the moving locking box body, the second locking mechanism includes: A second locking spring, arranged at the bottom of the moving locking box body; A second locking wedge block, arranged on the second locking spring; a second guiding groove for the movement of the second locking wedge block is arranged on the side of the moving locking box body; An axial adjustment button 10, one end of which is arranged on the second locking wedge block and the other end extends outside the moving locking box body to form a second pressing end; Under the pushing action of the second locking spring, the second locking wedge block applies pressure to the fixed shaft along the second guiding groove to perform locking; When the axial adjustment button is pressed, the second locking wedge block is adjusted to loosen the locked fixed shaft, and the fixed shaft is adjusted to axially move or rotate along the moving locking box body.

[0027] In this embodiment, to further illustrate the locking mechanism, refer to Figures 2-3 As shown, in the natural state, the locking spring 001 applies an upward force to the adjustment button 003, and the locking wedge block 002 applies pressure to the object to be locked under the action of the guiding groove to achieve the locking effect. When the adjustment button 001 is pressed downward, the locking wedge block moves to the left and simultaneously loosens the object to be locked. At this time, the object to be locked can be moved. After releasing the button, the object to be locked is fixed again under the action of the locking spring 001.

[0028] Press the radial adjustment button to move the locking arm left or right. Release the button to lock the locking arm in place. The adjustment buttons on both moving locking arms have the same function. Press the axial adjustment button to adjust the position of the fixed shaft up or down or to rotate the direction of the fixed shaft. The direction of the top arrow indicates the direction of the fixed shaft hook. The fixed shaft hook can transfer the acting force to the bearing. Release the axial adjustment button to lock the fixed shaft in the moving locking arm.

[0029] A buffer pad is provided at one end of the lifting screw rod (4) away from the manual handle to avoid damaging other components when disassembling the bearing.

[0030] In this embodiment, the handle provided at one end of the lifting screw rod 4 is a handle in the shape of a butterfly plate.

[0031] When disassembling the bearing mounted on the shaft and the bearing mounted in the hole, by rotating the butterfly plate at the top of the lifting screw rod, the buffer pad at the bottom of the lifting screw rod contacts the part. The buffer pad protects the part from being damaged by force. Continuing to rotate the butterfly plate, the cross beam drives the fixed shafts at both ends to move upward. There is a hexagonal socket mounting interface at the center of the top of the butterfly plate. When the interference of the bearing is too large and the butterfly plate cannot be rotated manually, an external tool can be used for operation. The specific operation is as follows.

[0032] A method for disassembling the bearing of an unmanned aerial vehicle aeroengine using a disassembly device includes the following steps: Adjust each connecting piece to move to a suitable distance from the connecting block 8, where this distance is determined according to the bearing to be disassembled; Adjust the axial distance between the two fixed shafts and by rotation, make the fixed shaft hooks of the two symmetrically catch the bottom of the bearing to be taken out; Rotate the lifting screw rod 4 through the handle so that the lifting screw rod 4 tightly abuts against the part mounting the bearing; Continue to rotate the lifting screw rod 4 so that the fixed shaft hook drives the bearing to move in the opposite direction of the force applied to the lifting screw rod 4 until the bearing is ejected; The bearing to be disassembled includes a bearing mounted in a hole or a bearing mounted on a shaft.

[0033] Among them, the method for disassembling the bearing mounted in a hole includes: First place the fixed shaft of the disassembly device inside the bearing to be taken out; Adjust the direction and position of the fixed shaft so that the fixed shaft hook catches the bottom of the bearing; Rotate the lifting screw rod through the handle so that the bottom of the lifting screw rod contacts the inner wall of the mounting part; Continue to rotate the lifting screw rod to move downward, and the fixed shaft hook drives the bearing to move upward until the bearing is ejected.

[0034] The method for disassembling the bearing mounted on a shaft includes: Rotate the lifting screw to move the lifting screw upward to a proper position; Adjust the direction and position of the fixed shaft so that the fixed shaft hook is stuck at the bottom of the bearing; Rotate the lifting screw so that the bottom of the lifting screw contacts the top of the mounting part; Continue to rotate the lifting screw downward, and the fixed shaft hook drives the bearing to move upward until the bearing is pushed out.

[0035] See Figure 4 As shown, for the disassembly of the bearing 005 installed in the hole, the operation method is as follows: 1) First, place the fixed shaft of the disassembly device inside the bearing 005 to be removed; 2) Press the adjustment buttons on the movable locking box respectively to adjust the direction and position of the fixed shaft so that the fixed shaft hook is stuck at the bottom of the bearing 005; where the cross beam is erected on the casing 004 for installing the bearing; 3) Rotate the butterfly piece at the top of the lifting screw clockwise so that the buffer pad at the bottom of the lifting screw contacts the inner wall of the mounting part; 4) Continue to rotate the butterfly piece clockwise to move the lifting screw downward, and the fixed shaft hook drives the bearing 005 to move upward until the bearing is pushed out.

[0036] See Figure 5 As shown, for the disassembly of the bearing 007 installed on the shaft, the operation method is as follows: 1) Rotate the butterfly piece at the top of the lifting screw counterclockwise to move the lifting screw upward to a proper position; 2) Press the adjustment buttons on the locking arm respectively to adjust the direction and position of the fixed shaft so that the fixed shaft hook is stuck at the bottom of the bearing 007; 3) Rotate the butterfly piece at the top of the lifting screw clockwise so that the buffer pad at the bottom of the lifting screw contacts the top of the mounting part 006; 4) Continue to rotate the butterfly piece clockwise to move the lifting screw downward, and the fixed shaft hook drives the bearing to move upward until the bearing is pushed out.

[0037] The present invention describes the preferred embodiments and their effects. However, those skilled in the art can make additional changes and modifications to these embodiments once they know the basic creative concepts. Therefore, the appended claims are intended to be construed as including the preferred embodiments and all changes and modifications falling within the scope of the present invention.

[0038] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for disassembling a bearing of an unmanned aerial vehicle aeroengine, characterized in that: The disassembly device used in the method includes: A connecting block (8), wherein connecting portions are symmetrically arranged on opposite sides of the connecting block (8), each connecting portion is provided with a connecting piece, and each connecting piece can be controlled to move away from or closer to the connecting block (8) on the corresponding connecting portion; A lifting screw rod (4) vertically penetrates the connecting block (8) and is threadedly connected to the connecting block (8); a rotating handle is provided at one end of the lifting screw rod (4); Each connecting piece is provided with a fixed shaft; Each of the fixed shafts is parallel to the lifting screw (4); Each fixed shaft can be controlled to move axially on the corresponding connecting piece; A fixed shaft hook is provided at the same end of each fixed shaft; Wherein, the fixed shaft hook is arranged away from a side of the handle; The method for disassembling the bearing of the UAV aero engine by using a disassembly device comprises the following steps: Adjust each connecting member to move to a suitable distance from the connecting block (8), wherein the distance is determined according to the bearing to be disassembled; Adjust the axial distance between the two fixed shafts and rotate them so that the two fixed shaft hooks are symmetrically clamped on the bottom of the bearing to be removed; Rotate the lifting screw rod (4) by means of a handle so that the lifting screw rod (4) is pressed against a part of the bearing installation; Continue to rotate the lifting screw (4) so ​​that the fixed shaft hook drives the bearing to move in the opposite direction of the force on the lifting screw (4) until the bearing is ejected; Among them, the bearings to be disassembled include hole-mounted bearings or shaft-mounted bearings.

2. The method for disassembling a UAV aero engine bearing according to claim 1, characterized in that: The method of disassembling the bearing installed in the hole includes: First, place the fixed shaft of the disassembly device into the bearing to be removed; Adjust the direction and position of the fixed shaft so that the fixed shaft hook is stuck at the bottom of the bearing; Rotate the lifting screw by the handle so that the bottom of the lifting screw contacts the inner wall of the installation part; Continue to rotate the lifting screw to move downward, and the fixed shaft hook drives the bearing to move upward until the bearing is ejected.

3. The method for disassembling a UAV aero engine bearing according to claim 1, characterized in that: The method of disassembling the bearing installed on the shaft includes: Rotate the lifting screw to move it up to a suitable position; Adjust the direction and position of the fixed shaft so that the fixed shaft hook is stuck at the bottom of the bearing; Rotate the lifting screw until the bottom of the lifting screw contacts the top of the mounting part; Continue to rotate the lifting screw to move downward, and the fixed shaft hook drives the bearing to move upward until the bearing is ejected.

4. The method for disassembling a UAV aero engine bearing according to claim 1, characterized in that: Each of the connecting parts comprises two cross beams (1) arranged in parallel.

5. The method for disassembling a UAV aero engine bearing according to claim 4, characterized in that: Each connecting member is a movable locking box; two parallel beams (1) penetrate the movable locking box; wherein one beam (1) penetrates one end of the movable locking box, and the other beam (1) penetrates the other end of the movable locking box; The movable locking box moves along two parallel beams (1); and the movable locking box is controlled by a first locking mechanism arranged in the movable locking box to move away from or close to the connecting block (8) along the two parallel beams (1).

6. The method for disassembling a UAV aero engine bearing according to claim 5, characterized in that: The first locking mechanism comprises: A first locking spring, disposed on one side of the movable locking box; A first locking wedge is arranged on the first locking spring; a first guide groove for movement of the first locking wedge is arranged on one side of the movable locking box; A radial adjustment button, one end of which is disposed on the first locking wedge, and the other end of which extends outside the movable locking box to form a first pressing end; The first locking wedge, under the pushing action of the first locking spring, applies pressure to the crossbeam along the first guide groove to lock the crossbeam; When the radial adjustment button is pressed, the first locking wedge is adjusted to release the locked crossbeam, and the movable locking box is adjusted to move on the crossbeam.

7. The method for disassembling a UAV aero engine bearing according to claim 5, characterized in that: Each of the fixed shafts vertically penetrates the corresponding movable locking box, and the penetration position is between two parallel beams (1); The fixed shaft is controlled to move axially or rotate by a second locking mechanism arranged in the movable locking box.

8. The method for disassembling a UAV aero engine bearing according to claim 7, characterized in that: The second locking mechanism comprises: A second locking spring, arranged at the bottom of the movable locking box; A second locking wedge is arranged on the second locking spring; a second guide groove for movement of the second locking wedge is arranged on the side of the movable locking box; An axial adjustment button, one end of which is disposed on the second locking wedge, and the other end of which extends outside the movable locking box to form a second pressing end; The second locking wedge, under the pushing action of the second locking spring, applies pressure to the fixed shaft along the second guide groove to lock the fixed shaft; When the axial adjustment button is pressed, the second locking wedge is adjusted to release the locked fixed shaft, and the fixed shaft is adjusted to move or rotate axially along the movable locking box.

9. The method for disassembling a UAV aero engine bearing according to claim 1, characterized in that: A buffer pad is provided at one end of the lifting screw rod (4) away from the manual handle.

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