Aircraft rotor repair reaming tool

Abstract

The utility model discloses an aircraft rotor maintenance reaming tool, including upper casing, handheld casing, butt joint plate, drive arrangement, positioning board, rotary plate, elastic sliding assembly and friction stick, the upper casing is rotatablely connected with handheld casing through butt joint plate, and the power output shaft of drive arrangement is connected on the butt joint plate, is equipped with the radial extension guide groove on the positioning board, and elastic sliding assembly can be slidably installed in the guide groove, is equipped with eccentric positioning slide in the rotary plate, and the friction stick is vertically arranged on the rotary plate and is connected with elastic sliding assembly through positioning slide, the utility model discloses through the cooperation of guide groove and positioning slide realizes the synchronous movement of multiple friction sticks, and when the friction stick and the convex part contact, the elasticity of multiple elastic sliding assemblies will all act on the corresponding friction stick, and the polishing of convex part is accelerated, and when multiple friction sticks contact with the inner wall of hole when rotating a round, the hole will be polished into a circle and be repaired, and the operation is very convenient.

Description

Technical Field

[0001] This utility model belongs to the technical field of aircraft rotor maintenance tools, and in particular relates to a hole-reaming tool for aircraft rotor maintenance. Background Technology

[0002] The rotor of a rotary-wing aircraft is a key component for its flight. Because the rotor is subjected to strong centrifugal force and complex and variable aerodynamics during operation, many small holes will form on the rotor over time. In order to ensure the structural strength and safety of the rotor, it is necessary to fill and repair the small holes on the rotor.

[0003] The formation of small holes on the rotor blade is usually in the following ways:

[0004] ① Impact from foreign objects: If the rotor collides at high speed with a large bird or a hard, large foreign object, it may create a small hole or puncture with a diameter of 5 centimeters or even larger, and may also cause large-area damage and deformation to the rotor surface. In some special circumstances, such as extreme weather such as encountering hailstones with large diameters, similar-sized holes may also be created.

[0005] ② Material fatigue and aging: If small holes formed due to material fatigue and aging are not detected and treated in time, they may continue to expand and connect with the increasing use time and continuous stress, eventually forming large holes that may reach about 3 to 5 centimeters in size. In severe cases, it may even cause large cracks or even breakage in the rotor structure.

[0006] ③ Corrosion: In extremely harsh corrosive environments such as high humidity and high salinity, the pores formed by corrosion may gradually deepen and enlarge. Adjacent pores may connect together to form a larger corrosion area with a diameter of about 2 to 4 centimeters.

[0007] Because each surface of the rotor is subjected to strong centrifugal force and complex and varied aerodynamic external factors, it is necessary to adjust the process for different sized holes when scraping off the corrosion layer inside the small holes, which makes the grinding process very troublesome. Utility Model Content

[0008] The purpose of this utility model is to provide a hole-reaming tool for aircraft rotor maintenance that is simple in structure, low in cost, easy to operate, and convenient for hole grinding.

[0009] The objective of this utility model is achieved through the following technical measures: A reaming tool for aircraft rotor maintenance, characterized in that it includes an open upper shell, a handheld shell, a receiving plate fixed to the lower surface of the bottom plate of the upper shell, a driving device disposed in the handheld shell, a positioning plate fixed in the upper shell, a rotating plate rotatably mounted in the upper shell, several elastic sliding components, and several friction rods. The upper shell is rotatably connected to the handheld shell through the receiving plate, and the power output shaft of the driving device is connected to the receiving plate. The positioning plate is provided with several guide grooves distributed circumferentially and extending radially. Each elastic sliding component is slidably mounted in the corresponding guide groove. The rotating plate is located above the positioning plate. The rotating plate is provided with several positioning slides distributed circumferentially and diverging in shape. The positioning slides are eccentrically arranged and pass through the rotating plate vertically. A limiting structure for restricting the upward movement of the rotating plate is provided at the opening of the upper shell and above the rotating plate. The friction rods are vertically disposed on the rotating plate, and the lower end of each friction rod is connected to the corresponding elastic sliding component through a connecting structure passing through the positioning slide.

[0010] This invention enables multiple friction rods to move synchronously through the combination of guide grooves and positioning slides. When the friction rods come into contact with the protrusions on the inner wall of the hole, the elasticity of multiple sliding components will act on the corresponding friction rods, accelerating the grinding of the protrusions. At the same time, when multiple friction rods rotate once and contact the inner wall of the hole evenly, the hole will be ground into a circle for repair. The operation is very convenient.

[0011] The elastic sliding assembly of this utility model consists of a sliding block and a compression spring. The two ends of the compression spring contact the side of the sliding block and the inner end of the guide groove, respectively. The connecting structure includes a receiving post on the top surface of the sliding block and a receiving sleeve at the bottom of the friction rod. The lower end of the receiving sleeve presses against the upper edge of the positioning slide. Both the receiving post and the receiving sleeve have receiving channels. The receiving post extends upward through the positioning slide and into the receiving sleeve, and is connected to it by bolts through the receiving channels.

[0012] The driving device of this utility model adopts a micro motor. The handheld housing is cylindrical with a cavity at the top to accommodate the receiving plate and the micro motor. There is a rotation gap between the receiving plate and the handheld housing. The receiving plate consists of a top plate, a boss located in the middle of the bottom surface of the top plate, and a fixing sleeve located on the bottom surface of the boss. The upper surface of the top plate is connected to the bottom plate of the upper housing. The side of the boss is provided with a guide protrusion along the circumference. The upper end of the inner wall of the cavity is provided with a guide groove along the circumference. The guide protrusion is located in the guide groove. The micro motor is fixed in the cavity, and the shaft end of its power output shaft extends upward into the fixing sleeve and is connected to it.

[0013] The power output shaft of this invention has a polygonal shaft at its end, and the fixing sleeve is a polygonal sleeve, with the polygonal shaft inserted into the polygonal sleeve.

[0014] The limiting structure of this utility model adopts a limiting ring with a thread on the outer ring surface. The bottom surface of the limiting ring contacts the upper plate surface of the rotating plate. The upper part of the inner wall of the upper housing is provided with an internal thread, and the limiting ring is threadedly connected to the upper housing.

[0015] This invention provides a pressure sensor between the receiving column and the receiving sleeve for collecting data on the pressure exerted by the friction rod against the inner wall of the hole.

[0016] The handheld housing of this utility model is formed by joining two half-shells together.

[0017] The upper housing of this utility model is box-shaped, and the positioning plate is disposed on the bottom plate of the upper housing.

[0018] The upper shell of this utility model is cylindrical, and the positioning plate serves as the bottom plate of the upper shell.

[0019] Compared with the prior art, the present invention has the following significant advantages:

[0020] This invention enables multiple friction rods to move synchronously through the combination of guide grooves and positioning slides. When the friction rods come into contact with the protrusions on the inner wall of the hole, the elasticity of multiple sliding components will act on the corresponding friction rods, accelerating the grinding of the protrusions. At the same time, when multiple friction rods rotate once and contact the inner wall of the hole evenly, the hole will be ground into a circle for repair. The operation is very convenient. Attached Figure Description

[0021] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0022] Figure 1 This is one of the overall structural schematic diagrams of this utility model;

[0023] Figure 2 This is an exploded view of the structure of each component inside the upper shell of this utility model;

[0024] Figure 3 This is the second overall structural schematic diagram of this utility model (with half of the handheld housing removed).

[0025] Figure 4 This is an exploded view of the upper shell and the limiting ring of this utility model;

[0026] Figure 5 This is a schematic diagram of the structure of the elastic sliding component of this utility model.

[0027] In the diagram: 110, upper shell; 111, bottom plate; 120, receiving plate; 121, top plate; 122, boss; 123, guide protrusion; 124, guide groove; 130, handheld shell; 140, internal thread; 150, limiting ring; 160, polygonal sleeve; 170, micro motor; 180, polygonal shaft; 190, cavity; 200, positioning plate; 210, guide groove; 300, rotating plate; 310, positioning slide; 400, elastic sliding component; 410, sliding block; 420, compression spring; 430, receiving column; 500, friction rod; 510, receiving sleeve; 520, receiving channel. Detailed Implementation

[0028] like Figures 1-5 As shown, this utility model discloses a reaming tool for aircraft rotor maintenance, comprising an open upper housing 110, a handheld housing 130, a receiving plate 120 fixed to the lower surface of the base plate 111 of the upper housing 110, a driving device disposed in the handheld housing 130, a positioning plate 200 fixed in the upper housing 110, a rotating plate 300 rotatably mounted in the upper housing 110, five elastic sliding components 400, and five friction rods 500. In this embodiment, the upper housing 110 is a circular box shape, the driving device is a micro motor 170, the upper housing 110 is rotatably connected to the handheld housing 130 via the receiving plate 120, and the power output shaft of the micro motor 170 is connected to the receiving plate 120. The positioning plate 200 is fixed to the base plate 111 of the upper housing 110. The upper housing 110 has five guide grooves 210 arranged in a circular pattern and extending radially. Each elastic sliding component 400 is slidably installed in the corresponding guide groove 210. The rotating plate 300 is located above the positioning plate 200. The rotating plate 300 has five positioning slides 310 arranged in a circular pattern and extending radially. The positioning slides 310 are eccentrically arranged and pass through the rotating plate 300 vertically. The positioning slides 310 and their corresponding guide grooves 210 below them are staggered. At the opening of the upper housing 110 and above the rotating plate 300, there is a limiting structure for restricting the upward movement of the rotating plate 300. The friction rods 500 are vertically arranged on the rotating plate 300, and the lower end of each friction rod 500 is connected to the corresponding elastic sliding component 400 through a connecting structure passing through the positioning slides 310.

[0029] The guide groove 210 and the positioning slide 310 work together to enable the synchronous movement of multiple friction rods 500. When the friction rods 500 come into contact with the protruding parts of the inner wall of the hole, the elastic force of multiple elastic sliding components 400 will act on the corresponding friction rods 500, accelerating the grinding of the protruding parts. At the same time, when multiple friction rods 500 rotate one revolution and come into contact with the inner wall of the hole, the hole will be ground into a circle and then repaired. The positioning plate 200 and the guide groove 210 guide and position the sliding of the elastic sliding components 400. As the rotating plate 300 rotates, the position of the guide groove 210 and the positioning slide 310 will change, and when the position changes, it will squeeze the elastic sliding components 400 to slide and change position.

[0030] The elastic sliding assembly 400 consists of a sliding block 410 and a compression spring 420. The sliding block 410 is slidably installed in the guide groove 210, and the sliding block 410 contacts the inner wall of the guide groove 210 and the rotating plate 300. The two ends of the compression spring 420 contact the side of the sliding block 410 and the inner end of the guide groove 210 respectively, and are always in a compressed state. The connection structure includes a receiving post 430 provided on the top surface of the sliding block 410 and a receiving sleeve 510 provided at the bottom of the friction rod 500. The lower end of the receiving sleeve 510 presses against the upper edge of the positioning slide 310. Both the receiving post 430 and the receiving sleeve 510 are provided with receiving channels 520. The receiving post 430 extends upward through the positioning slide 310 into the receiving sleeve 510 and is connected to it by bolts through the receiving channels 520.

[0031] A pressure sensor is provided between the receiving column 430 and the receiving sleeve 510 for collecting data on the extrusion force between the friction rod 500 and the inner wall of the hole. This pressure sensor is existing technology.

[0032] When the rotating plate 300 rotates, the inner wall of the positioning slide 310 will press against the receiving column 430, causing the receiving column 430 to drive the sliding block 410 to slide. When the sliding block 410 slides, it presses against the compression spring 420, increasing the compression force of the compression spring 420. The setting of the sliding block 410 ensures the stability of the receiving column 430 and prevents the receiving column 430 from tilting when it is pressed, which would affect the normal grinding of the friction rod 500. The setting of the compression spring 420 always applies an outward force to the sliding block 410, so that the sliding block 410 can drive the friction rod 500 to press and grind the inner wall of the hole. The receiving sleeve 510 is fitted onto the outside of the receiving column 430, so that the receiving column 430 drives the friction rod 500 to move and rotate synchronously when rotating and sliding, and prevents the friction rod 500 from shaking when squeezed; the friction rod 500 is connected and fixed to the receiving column 430 by the cooperation of the receiving channel 520 and the bolt, so that the friction rod 500 will not fall off when squeezed by external force.

[0033] The handheld housing 130 is cylindrical, with a cavity 190 at its upper part to accommodate the receiving plate 120 and the micro motor 170. A rotational clearance exists between the receiving plate 120 and the handheld housing 130. The upper part of the cavity 190 is adapted to the receiving plate 120 and engages with it to ensure a stable connection without affecting rotation. The handheld housing 130 is formed by connecting two half-housing halves together with push-back bolts and is fitted onto the outside of the receiving plate 120. The receiving plate 120 consists of a top plate 121, a boss 122 located in the middle of the bottom surface of the top plate 121, and a fixing sleeve located on the bottom surface of the boss 122. The upper surface of the top plate 121 is connected to the bottom plate 111 of the upper housing 110. The side of the boss 122 is provided with a guide protrusion 123 along the circumference. The upper end of the inner wall of the cavity 190 is provided with a guide groove 124 along the circumference. The guide protrusion 123 is located in the guide groove 124. The micro motor 170 is fixed in the cavity 190, and the shaft end of its power output shaft extends upward into the fixing sleeve and connects with it. In this embodiment, the shaft end of the power output shaft is a polygonal shaft 180, and the fixing sleeve is a polygonal sleeve 160. The polygonal shaft 180 is inserted into the polygonal sleeve 160. Through the cooperation of the polygonal sleeve 160 and the polygonal shaft 180, the receiving plate 120 can be rotated normally when the micro motor 170 rotates.

[0034] The upper housing 110 provides space for the installation of the positioning plate 200 and the rotating plate 300, and ensures the stability of the positioning plate 200 and the rotating plate 300 after installation; the handheld housing 130 facilitates the handheld use of this device; the receiving plate 120 ensures the normal connection between the upper housing 110 and the handheld housing 130, and allows the upper housing 110 to rotate normally relative to the handheld housing 130.

[0035] The limiting structure employs a limiting ring 150 with threads on its outer ring surface. The bottom surface of the limiting ring 150 contacts the upper plate surface of the rotating plate 300. The upper part of the inner wall of the upper housing 110 is provided with an internal thread 140, and the limiting ring 150 is threadedly connected to the upper housing 110. The interaction between the internal thread 140 and the limiting ring 150 restricts the rotating plate 300, preventing it from becoming loose during use and affecting the restriction of the sliding block 410.

[0036] The working principle and usage process of this utility model are as follows:

[0037] In use, first prepare the hole by hand, then press the friction rod 500 to move the sliding block 410 towards the center of the positioning plate 200 via the receiving column 430. This causes the sliding block 410 to press the compression spring 420, increasing its stress. Then, insert the friction rod 500 into the hole and slowly release the pressure on the friction rod 500. The spring force of the compression spring 420 will be released, pushing the friction rod 500 into contact with the inner wall of the hole. Then, start the micro motor 170 to drive the friction rod 500. The upper housing 110 rotates, which in turn causes the friction rods 500 to rotate and grind the inner wall of the hole. When one of the friction rods 500 contacts the protrusion on the inner wall of the hole, it pushes the sliding block 410 and the receiving column 430 to rotate, causing the receiving column 430 to press against the inner wall of the positioning slide 310. This causes the rotating plate 300 to rotate, and during rotation, the inner walls of the other positioning slides 310 press against the corresponding sliding blocks 410, causing the sliding blocks 410 to drive the friction rods 500 to slide and disengage from the inner wall of the hole. In practical applications, the number of friction rods can be determined according to the diameter of the hole to be ground, and the number of elastic sliding components, guide grooves, and positioning slides can be determined accordingly. The number of friction rods is at least two.

[0038] In other embodiments, the upper housing can be cylindrical, in which case the positioning plate serves as the bottom plate of the upper housing.

[0039] The embodiments of this utility model are not limited thereto. Based on the above content of this utility model, and in accordance with the common technical knowledge and conventional means in the field, without departing from the basic technical idea of ​​this utility model, this utility model can also be modified, replaced or changed in various other forms, all of which fall within the scope of protection of this utility model.

Claims

1. A reamer tool for aircraft rotor maintenance, characterized in that: The device includes an open upper shell, a handheld shell, a receiving plate fixed to the lower surface of the bottom plate of the upper shell, a driving device disposed in the handheld shell, a positioning plate fixed in the upper shell, a rotating plate rotatably mounted in the upper shell, several elastic sliding components, and several friction rods. The upper shell is rotatably connected to the handheld shell through the receiving plate, and the power output shaft of the driving device is connected to the receiving plate. The positioning plate has several guide grooves distributed circumferentially and extending radially. Each elastic sliding component is slidably mounted in the corresponding guide groove. The rotating plate is located above the positioning plate. The rotating plate has several positioning slides distributed circumferentially and diverging in shape. The positioning slides are eccentrically arranged and pass through the rotating plate vertically. At the opening of the upper shell and above the rotating plate, there is a limiting structure for restricting the upward movement of the rotating plate. The friction rods are vertically disposed on the rotating plate, and the lower end of each friction rod is connected to the corresponding elastic sliding component through a connecting structure passing through the positioning slide.

2. The reamer for aircraft rotor maintenance according to claim 1, characterized in that: The elastic sliding assembly consists of a sliding block and a compression spring. The two ends of the compression spring contact the side of the sliding block and the inner end of the guide groove, respectively. The connecting structure includes a receiving post on the top surface of the sliding block and a receiving sleeve at the bottom of the friction rod. The lower end of the receiving sleeve presses against the upper edge of the positioning slide. Both the receiving post and the receiving sleeve have receiving channels. The receiving post extends upward through the positioning slide and into the receiving sleeve, and is connected to it by bolts through the receiving channels.

3. The reamer for aircraft rotor maintenance according to claim 2, characterized in that: The driving device uses a micro motor. The handheld housing is cylindrical with a cavity at its upper part to accommodate the receiving plate and the micro motor. There is a rotation gap between the receiving plate and the handheld housing. The receiving plate consists of a top plate, a boss located in the middle of the bottom surface of the top plate, and a fixing sleeve located on the bottom surface of the boss. The upper surface of the top plate is connected to the bottom plate of the upper housing. The side of the boss is provided with a guide ridge along the circumference. The upper end of the inner wall of the cavity is provided with a guide groove along the circumference. The guide ridge is located in the guide groove. The micro motor is fixed in the cavity, and the shaft end of its power output shaft extends upward into the fixing sleeve and connects to it.

4. The reamer for aircraft rotor maintenance according to claim 3, characterized in that: The power output shaft has a polygonal shaft end, the fixing sleeve is a polygonal sleeve, and the polygonal shaft is inserted into the polygonal sleeve.

5. The reamer for aircraft rotor maintenance according to claim 4, characterized in that: The limiting structure adopts a limiting ring with a threaded outer ring surface. The bottom surface of the limiting ring contacts the upper plate surface of the rotating plate. The upper part of the inner wall of the upper housing is provided with an internal thread, and the limiting ring is threadedly connected to the upper housing.

6. The reamer for aircraft rotor maintenance according to claim 5, characterized in that: A pressure sensor is provided between the receiving column and the receiving sleeve to collect data on the pressure exerted by the friction rod against the inner wall of the hole.

7. The reamer for aircraft rotor maintenance according to claim 6, characterized in that: The handheld housing is formed by joining two half-housing halves together.

8. The reamer for aircraft rotor maintenance according to claim 7, characterized in that: The upper housing is box-shaped, and the positioning plate is disposed on the bottom plate of the upper housing.

9. The reamer for aircraft rotor maintenance according to claim 7, characterized in that: The upper shell is cylindrical, and the positioning plate serves as the bottom plate of the upper shell.

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