Blind cavity internal nut feeding device and method for an aeroengine

Abstract

The application provides an aero-engine blind cavity internal nut feeding device and method, and relates to the field of aero-engine assembly equipment.The device comprises a conveying device and a feeding device.The conveying device is used for feeding the nut into the aero-engine blind cavity and storing the nut, so that the nut is located in the aero-engine blind cavity and can move freely.The feeding device is used for receiving the nut in the aero-engine blind cavity.Compared with the prior art, the conveying device can drive the nut into the aero-engine blind cavity, so that the cylindrical protrusion and the feeding pipe are coaxial, the nut falls on the cylindrical protrusion, the cylindrical protrusion is moved upward, and finally the nut can be assembled on the nut locking and screwing assembly.In the process, the hand does not need to directly contact the nut, that is, the hand does not need to be inserted into the aero-engine blind cavity, the nut can be controlled to enter the aero-engine blind cavity outside the aero-engine blind cavity, the position of the nut in the aero-engine blind cavity can be controlled to move, and the aero-engine blind cavity nut conveying is easy to operate.

Description

Technical Field

[0001] This invention belongs to the field of aero-engine assembly technology, specifically relating to a nut feeding device and method for a small space environment inside the blind cavity of an aero-engine. Background Technology

[0002] With the development of aero engines, existing nuts and studs are all installed in pairs, requiring a one-to-one correspondence between the nuts and studs to ensure the balance and stability of the fan disc shaft under high-speed rotation.

[0003] like Figure 1 The diagram shown is a cross-sectional view of the connection between the fan disc shaft 1003 and the connecting disc 1004. When assembling bolts within the rotor blind cavity, the blind cavity must be placed vertically. Figure 1 As shown, the tightening device is then inserted into the blind cavity from the upper cavity opening. After reaching the assembly position, the nut is tightened. In some engine models, the inner diameter of the upper cavity opening is ≤Φ95mm, the axial distance from the lowest point of the blind cavity to the nut to be tightened is ≤40mm, the diameter of the center circle of the nut is ≤Φ230mm, and the spacing between adjacent nuts is ≤30mm.

[0004] Currently, for such confined spaces, the nuts are usually installed manually. This means that the nuts and studs need to be installed manually by inserting them into the mating space. This space has very demanding requirements for manual assembly, such as being narrow and requiring workers with small hands to be able to reach into it. Summary of the Invention

[0005] The purpose of this invention is to provide a nut feeding device and method for the blind cavity of an aero-engine, which can conveniently and quickly transport the nut to the required position inside the blind cavity.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is a nut feeding device inside the blind cavity of an aero-engine, comprising a conveying device and a feeding device. The conveying device is used to feed the nut into the engine blind cavity and store the nut. After the nut is discharged from the lower end, the nut is located in the engine blind cavity and can move freely.

[0007] The feeding device is used to receive the nuts in the engine blind cavity and can drive the nuts to make circular and vertical movements.

[0008] Furthermore, the conveying device includes a feeding pipe and a rotating stop mechanism. The feeding pipe has a vertical conveying channel inside, which is used to store nuts. The rotating stop mechanism is connected to the feeding pipe and is used to position and constrain the nuts in the conveying channel.

[0009] Furthermore, the conveying device also includes a drive assembly connected to the feed pipe, which is used to enable the feed pipe and the rotary stop mechanism to move vertically simultaneously.

[0010] Furthermore, the rotary stop mechanism includes a swing rod, a transmission system support, and a stopper. The swing rod is parallel to the feed pipe and can rotate. The transmission system support is installed at the upper end of the feed pipe and connected to the swing rod. The stopper is connected to the swing rod, so that the swing rod drives the stopper to move, which is used to constrain the position of the nut in the conveying channel.

[0011] Furthermore, the drive assembly includes a bushing, a lifting system support, a drive motor, and a rack. The bushing allows the feed tube to pass through it. The lifting system support is connected to the upper end of the bushing. The drive motor is mounted on the lifting system support, and a drive gear is fixed on the output shaft of the drive motor. The rack is disposed on the outer wall of the feed tube and extends along the length of the feed tube for meshing with the drive gear.

[0012] Furthermore, the feeding device includes a guide shaft, a telescopic rod, a cylindrical protrusion, and a transmission assembly. The guide shaft is capable of rotation and vertical movement; the telescopic rod is connected to the guide shaft, enabling it to perform circular motion; the cylindrical protrusion is located on the telescopic rod and is used to receive the nut; the transmission assembly is used to control the movement of the guide shaft.

[0013] Furthermore, the transmission assembly includes a roller sleeve and a push guide bar. The roller sleeve is coupled to the guide shaft and has a rotating gear docked at its upper end. The push guide bar meshes with the rotating gear, and when the push guide bar is translated, it causes the guide shaft to rotate.

[0014] Furthermore, the transmission assembly also includes a toothed groove and a lifting motor. The toothed groove is disposed on the guide shaft and arranged along the length of the guide shaft. The lifting motor is connected to a lifting gear, which meshes with the toothed groove of the guide shaft to enable the guide shaft to move axially.

[0015] A method for feeding nuts inside a blind cavity of an aero-engine, as described in this application, includes the following steps:

[0016] Insert the lower ends of the conveying device and the feeding device into the engine blind cavity, and adjust the horizontal height of the lower ends of both.

[0017] The guide shaft on the feeding device is rotated, which drives the cylindrical protrusion on the telescopic rod to move downwards towards the feeding pipe, so that the cylindrical protrusion and the feeding pipe are coaxial.

[0018] The swing arm on the control conveyor rotates, and after rotation, the baffle rotates, releasing the constraint on the nut in the feed pipe, allowing the nut to be discharged from the feed pipe and fall on the cylindrical protrusion.

[0019] The guide shaft on the feeding device is rotated in the opposite direction, causing the cylindrical protrusion and nut on the telescopic rod to move in the opposite direction to above the assembly position.

[0020] The guide shaft moves upward, causing the nut to move upward and be assembled onto the nut locking assembly.

[0021] Furthermore, the conveying device stores nuts in a stacked state.

[0022] Compared with the prior art, the beneficial effects of the present invention are as follows: the nut is driven into the engine blind cavity by the conveying device, and then the cylindrical protrusion on the telescopic rod moves to make the cylindrical protrusion and the feed tube coaxial. Then the nut in the feed tube is discharged and falls on the cylindrical protrusion, which receives the nut. Then the cylindrical protrusion can be controlled to move in the opposite direction to align with the assembly position on the nut locking assembly. Then the cylindrical protrusion is moved upward to finally assemble the nut onto the nut locking assembly. During the process, there is no need for the hand to directly contact the nut, that is, there is no need to put the hand into the engine blind cavity. The nut can be controlled to enter the engine blind cavity from the outside of the engine blind cavity, and the position movement of the nut in the engine blind cavity can also be controlled, which provides easy operation for conveying the nut in the engine blind cavity. Attached Figure Description

[0023] Figure 1 This is a cross-sectional schematic diagram of the connection between the fan disc shaft and the connecting disc in the prior art;

[0024] Figure 2 This is a schematic diagram of the overall structure of the present invention;

[0025] Figure 3 This is a schematic diagram of the conveying device structure of the present invention;

[0026] Figure 4 This is a schematic diagram of the structure of a first embodiment of the feed stopper of the present invention;

[0027] Figure 5 This is a schematic diagram of the overall structure of the feeding device of the present invention;

[0028] Figure 6 This is a schematic diagram of part A of the feeding device of the present invention;

[0029] Figure 7 This is a schematic diagram of the structure of the feed stopper in Embodiment 2 of the present invention;

[0030] Figure 8 This is a schematic diagram of the baffle structure in Embodiment 2 of the present invention;

[0031] Figure 9 This is a front view structural diagram of Embodiment 3 of the material stopper of the present invention;

[0032] Figure 10 This is a bottom view of the structure of embodiment three of the feed stopper of the present invention;

[0033] Figure 11 This is a schematic diagram of the guiding component structure of the present invention;

[0034] Figure 12 This is a schematic diagram showing the connection between the outer guide rod and the feed pipe of the present invention.

[0035] Among them, 1-nut locking assembly, 1003-fan disc shaft, 1004-connecting disc, 201-feeding pipe, 2021-shaft sleeve, 2022-lifting system support, 2023-drive motor, 2024-drive gear, 2025-rack, 2031-transmission system support, 2032-swing rod, 2033-limit sleeve, 2034-material stopper, 20341-cylindrical body. 20342-Stop plate, 20343-Sliding sleeve body, 20344-Support rod, 20345-Pull rod, 20346-Elastic pressure rod, 2035-Rotary motor, 301-Guide shaft, 302-Telescopic rod, 3031-Positioning inner sleeve, 3032-Fixing plate, 30311-Top positioning short sleeve, 30312-Bottom tray, 3033-Roller sleeve, 30331-Guide wheel, 30 34-Rotary gear, 3035-Push guide bar, 3036-Rotary push electric cylinder, 3037-Lifting positioning seat, 3038-Lifting motor, 3039-Lifting gear, 30310-Slider, 304-Columnar protrusion, 4-Mounting base, 5-Slide rail, 6-Horizontal push motor, 203401-Baffle plate, 2034011-Baffle plate, 2034012-Baffle plate, 2034 013-Notch, 203402-Ring gear, 203403-Locking wheel, 2034031-Locking end, 203404-Supporting wheel, 2034041-Supporting end, 203405-Side notch, 203406-Gear ring, 20101-Guide groove, 701-Center guide rod, 702-Top plate, 703-Outer guide rod, 704-Locking rod. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0038] See Figure 2 As shown, a nut feeding device for the blind cavity of an aero-engine is used in conjunction with a nut locking assembly 1. This feeding device is mainly used to transport nuts to the nut locking assembly 1. The feeding device includes a feeding device and a conveying device. Nuts are stored in the conveying device, and then the conveying device is moved so that its lower end enters the engine blind cavity. Then, the nuts stored in the conveying device are discharged, so that the nuts are located on the feeding device. The feeding device drives the nuts to move, so that the nuts are transferred to the nut locking assembly 1, and finally the nuts are docked with the nut locking assembly 1. During this process, it is not necessary to put hands into the engine blind cavity, reducing the difficulty of assembling nuts in the narrow space inside the aero-engine blind cavity.

[0039] See Figure 2 and Figure 3 As shown, the conveying device includes a feed pipe 201, which is vertical. The internal channel of the feed pipe 201 is a conveying channel, which is also vertical. The feed pipe 201 is connected to a rotating baffle mechanism, which blocks the lower end of the feed pipe 201. Nuts that need to be installed in the blind cavity are stored in the conveying channel of the feed pipe 201. At this time, the nuts in the feed pipe 201 are in a stacked state. By controlling the rotating baffle mechanism, the nut at the bottom of the feed pipe 201 can be discharged. However, it should be noted that before the nut is discharged, the feeding component needs to be able to receive the discharged nut. That is, the nut in the feed pipe 201 will fall on the feeding component after being discharged, and then the feeding component can transfer the nut. In this way, the nuts can be moved in the engine blind cavity through the coordinated cooperation of the feeding component and the conveying component.

[0040] The aforementioned feed pipe 201 and rotary baffle mechanism can move vertically simultaneously, allowing the nut to be discharged from the engine blind cavity at a suitable position. Specifically, a drive assembly is connected to the feed pipe 201, which controls the vertical movement of the feed pipe 201. The drive assembly includes a bushing 2021 sleeved on the feed pipe 201, with a lifting system support 2022 connected to its upper end. The lifting system support 2022 is connected to a drive motor 2023, which controls the vertical movement of the feed pipe 201. 1. Vertical movement is achieved, for example: a drive gear 2024 is fixed on the output shaft of the drive motor 2023, and a rack 2025 is provided on the outer wall of the feed pipe 201. The rack 2025 extends along the length of the feed pipe 201, and an opening is provided on the bushing 2021 near the upper end, so that the drive gear 2024 can mesh with the rack 2025. Thus, when the drive motor 2023 controls the drive gear 2024 to rotate, the feed pipe 201 can be moved vertically, thereby adjusting the position of the nut discharge.

[0041] The rotating baffle mechanism moves simultaneously with the feed pipe 201. Specifically, the rotating baffle mechanism includes a transmission system support 2031 installed at the upper end of the feed pipe 201. The transmission system support 2031 is also connected to a swing rod 2032, which is parallel to the feed pipe 201. The swing rod 2032 longitudinally passes through the lifting system support 2022. A limit sleeve 2033 is fixed on the outer wall of the feed pipe 201, located near the lower end of the feed pipe 201. The lower end of the swing rod 2032 passes through the limit sleeve 2033, and a baffle 2034 is connected to the lower end of the swing rod 2032. The feed stop 2034 limits the nut at the lowest position in the feed pipe 201. A rotary motor 2035 is also installed on the transmission system support 2031. A gear set is set in the transmission system support 2031. The rotary motor 2035 is connected to the swing rod 2032 through the gear set. That is, when the rotary motor 2035 is working, its output shaft controls the gear set to work. At this time, the gear set drives the swing rod 2032 to rotate, which in turn makes the feed stop 2034 rotate. When the feed stop 2034 no longer limits the nut at the lowest position in the feed pipe 201, the nut can be discharged from the feed pipe 201.

[0042] See Figure 4As shown, the first embodiment of the baffle 2034 in this technical solution includes a columnar body 20341. The upper end of the columnar body 20341 is connected to the swing rod 2032. The columnar body 20341 is provided with a bottom support and a clamping member. The clamping member is located above the bottom support and can move vertically. After the clamping member is adjusted to the designated position, it can be locked. When the bottom support and the clamping member are not rotating, the bottom support supports the nut in the feed pipe 201. Then, the swing rod 2032 controls the bottom support and the clamping member to rotate synchronously. When the bottom support no longer supports the nut, the nut can be discharged from the feed pipe 201.

[0043] A long, narrow limiting port is provided on the feed pipe 201. The limiting port is located near the lower end of the feed pipe 201. When the bottom support does not support the nut, the locking component locks the position of the nut at the second lowest position in the feed pipe 201 to prevent the nut in the feed pipe 201 from sliding down freely.

[0044] The base support consists of several baffle plates 20342 arranged in a circular array around the columnar body 20341. The area between two adjacent baffle plates 20342 is the feeding interval. When the swing rod 2032 is not rotating, the baffle plates 20342 block the lower end of the feeding pipe 201. When the swing rod 2032 rotates, the baffle plates 20342 move accordingly. When the feeding interval is located directly below the feeding pipe 201, the nut at the lowest position in the feeding pipe 201 can be discharged under its own weight, allowing the nut to pass through the feeding interval. At this time, the clamping member can squeeze the second lowest nut above the nut, thus realizing the discharge of nuts one by one.

[0045] Specifically, the locking component includes a sliding sleeve 20343 sleeved on the cylindrical body 20341. A locking pin is provided on the sliding sleeve 20343, and the locking pin is screwed onto the sliding sleeve 20343. After the sliding sleeve 20343 is slid to a designated position, the position of the sliding sleeve 20343 can be locked by turning the locking pin. At this time, the sliding sleeve 20343 can rotate synchronously with the cylindrical body 20341. Several radially extending support rods 20344 are provided on the sliding sleeve 20343. The number of support rods 20344 is the same as the number of feeding intervals. Each support rod 20344 has an arc-shaped bend at its end connected to a tie rod 20345. An elastic pressure rod 20346 is installed between two adjacent support rods 20344. The end of the elastic pressure rod 20346 connects to the tie rod 20345, with a rounded transition at the connection point. The elastic pressure rod 20346 is also arc-shaped, forming a wave-like shape after connecting to the tie rod 20345. The elastic pressure rod 20346 is located directly above the feeding interval, thus allowing the material to pass through. The pull rod 20345 forms a closed ring. When the bottom support blocks the lower end of the feed pipe 201, the pull rod 20345 corresponds to the second-lowest nut, meaning the feed pipe 201 is located between two adjacent elastic pressure rods 20346. At this time, the pull rod 20345 will not contact the nut. When the cylindrical body 20341 is rotated, both the stop plate 20342 and the elastic pressure rods 20346 undergo circular motion, causing the stop plate 20342 to gradually separate from the lower end of the feed pipe 201. During this process... The elastic pressure rod 20346 will gradually come into contact with the second lowest nut and squeeze it, so that when the lowest nut is discharged, the second lowest nut will still be in the feed tube 201. At this time, the second lowest nut is not supported, but it will not move downward. Then, the swing rod 2032 will continue to rotate, so that the stop plate 20342 will be positioned below the feed tube 201 again. During this process, the elastic pressure rod 20346 will gradually separate from the squeezed nut, so that the nut in the feed tube 201 can be fed downward.

[0046] Several nuts can be pre-stored in the feed pipe 201, and then the feed pipe 201 is moved into the engine blind cavity. When it reaches the designated position, the feeding device can be adjusted to receive the nuts. Then, by controlling the baffle 2034, the nuts in the feed pipe 201 are discharged one by one and fall onto the feeding device. In this way, there is no need to manually feed the nuts into the engine blind cavity, nor is it necessary to put them in one by one, which can increase the convenience of operation.

[0047] See Figure 2 , Figure 5 and Figure 6As shown, the feeding device in this application includes a guide shaft 301. The lower end of the guide shaft 301 is connected to a telescopic rod 302. The free end of the telescopic rod 302 is fixed with a cylindrical protrusion 304. Before the nut is discharged from the feed pipe 201, the telescopic rod 302 needs to be moved by the guide shaft 301. Finally, the cylindrical protrusion 304 at the free end of the telescopic rod 302 moves to a position below the feed pipe 201. At this time, the cylindrical protrusion 304 is coaxially arranged with the feed pipe 201, that is, the bottom support is located between the cylindrical protrusion 304 and the feed pipe 201.

[0048] The guide shaft 301 can rotate and move axially. This guide shaft 301 should be parallel to the feed pipe 201. A transmission assembly is fitted onto the guide shaft 301 to control its movement. The transmission assembly includes a positioning inner sleeve 3031 through which the guide shaft 301 passes. The upper end of the positioning inner sleeve 3031 is connected to the fixed plate 3032. The positioning inner sleeve 3031 includes a top positioning short sleeve 30311 and a bottom tray. 30312, a hanging plate with an arc-shaped end face is connected between the top positioning short sleeve 30311 and the bottom tray 30312. At this time, a roller sleeve 3033 is fitted on the positioning inner sleeve 3031 in the vertical interval area formed between the top positioning short sleeve 30311 and the bottom tray 30312. The roller sleeve 3033 is located in the vertical interval area. A rotating gear 3034 is fixed to the upper end of the roller sleeve 3033. At the same time, a push guide strip is slidably connected to the lower surface of the fixed plate 3032. Rotary actuator 3036 pushes guide bar 3035 to mesh with rotating gear 3034 on the upper end of roller sleeve 3033. Simultaneously, guide bar 3035 is also connected to the output end of rotary actuator 3036. Rotary actuator 3036 controls the translation of guide bar 3035, which in turn drives rotating gear 3034 to rotate, thereby causing roller sleeve 3033 to rotate. It should be noted that guide shaft 301 is coupled to roller sleeve 3033. Specifically, the guide shaft 301 is provided with an axially extending strip groove, and a number of guide wheels 30331 are provided on the roller sleeve 3033. Parts of the guide wheels 30331 are located in the strip groove. That is, when the roller sleeve 3033 rotates, it will also drive the guide shaft 301 to rotate, which in turn drives the telescopic rod 302 at the lower end of the guide shaft 301 to perform circumferential motion. In this way, the position of the cylindrical protrusion 304 can be adjusted so that the cylindrical protrusion 304 is aligned with the feed pipe 201.

[0049] A lifting positioning seat 3037 is fixed on the roller sleeve 3033. A lifting motor 3038 is installed on the lifting positioning seat 3037. The lifting motor 3038 is connected to a lifting gear 3039 through a reducer. A flat opening is also provided on the roller sleeve 3033. The lifting gear 3039 passes through the flat opening and meshes with the guide shaft 301. That is, the guide shaft 301 should be provided with a toothed groove. The toothed groove is arranged along the length direction of the guide shaft 301. The operation of the lifting motor 3038 can make the guide shaft 301 move vertically, thereby adjusting the horizontal height of the telescopic rod 302, so that the nut located on the cylindrical protrusion 304 can move vertically. In this way, the guide shaft 301 can be controlled to rotate first, so that the nut on the cylindrical protrusion 304 can be moved to a position below the nut locking assembly 1. Then, the guide shaft 301 can be controlled to move upward, so that the nut on the cylindrical protrusion 304 can move upward, and finally the nut can be assembled with the nut locking assembly 1.

[0050] In this application, during the nut conveying process, the feeding device and the conveying device need to work together. Therefore, for ease of use, both the feeding device and the conveying device are installed on the mounting base 4. Specifically, the lifting motor 3038 of the conveying device is connected to the mounting base 4, and a slide rail 5 is provided on the mounting base 4. A slider 30310 is provided on the fixing plate 3032 of the feeding device. Through the cooperation of the slider 30310 and the slide rail 5, the feeding device is connected to the mounting base 4. A horizontal push motor 6 is also provided on the mounting base 4. The output end of the horizontal push motor 6 is connected to the fixing plate 3032. In this way, the horizontal push motor 6 can control the movement of the fixing plate 3032, thereby adjusting the position of the telescopic rod 302 and the cylindrical protrusion 304, which can increase the applicability.

[0051] See Figure 3 , Figure 7 and Figure 8As shown in Embodiment 2, the structure of the aforementioned baffle 2034 is improved as follows: The baffle 2034 includes a cylindrical body 20341, on which two baffle plates 2034011 are provided. Each of the two baffle plates 2034011 is connected to a baffle plate 2034012. At this time, the baffle plates and the baffle plates 2034011 form a baffle plate 203401, that is, two baffle plates 2034012 are fixed on the cylindrical body 20341. 1. Two baffles 203401 are arranged vertically, each with a notch 2034013. Based on their different horizontal heights, the two baffles 203401 can be divided into an upper baffle and a lower baffle. Similarly, the notch on the upper baffle is called the upper notch, and the notch on the lower baffle is called the lower notch. The baffle on the upper baffle is called the upper baffle plate, and the baffle on the lower baffle is called the lower baffle plate. The upper baffle plate is located directly above the lower notch, and the upper notch is located on the lower baffle plate. At the top, two strip-shaped openings are provided on the feed pipe 201. When the columnar body 20341 rotates, the upper baffle and the lower baffle pass through the two openings respectively. When the columnar body 20341 does not rotate, the lower baffle supports the lowest nut in the feed pipe 201, and the upper notch of the upper baffle corresponds to the opening. At this time, the second lowest nut is not restricted. After the columnar body 20341 is rotated, the lower baffle no longer supports the lowest nut. At this time, the lower notch corresponds to the opening, and the lowest nut falls under the action of gravity. At this time, the upper baffle supports the second lowest nut, preventing the second lowest nut from being discharged from the feed pipe 201. In this implementation structure, there needs to be a gap between the edges of two adjacent nuts located in the feed pipe 201 so that the upper baffle can enter the gap. When the baffle 2034 adopts this implementation structure, it occupies relatively little space and can be used for the assembly of nuts in a small engine blind cavity environment.

[0052] See Figure 3 , Figure 9 and Figure 10As shown in Embodiment 3, the feed stopper 2034 in Embodiment 1 is also improved, specifically as follows: The feed stopper 2034 includes a cylindrical body 20341, on which two gears 203402 are provided. A high-position strip-shaped opening and a low-position strip-shaped opening are provided on the feed pipe 201, each with several openings arranged in a circular array around the central axis of the feed pipe 201. A positioning wheel 203403 and a supporting wheel 203404 are axially connected to the feed pipe 201. Both the positioning wheel 203403 and the supporting wheel 203404 have side edges. At notch 203405, a positioning end 2034031 and a supporting end 2034041 are formed on the positioning wheel 203403 and the supporting wheel 203404, respectively. When the side notch 203405 of the positioning wheel 203403 aligns with the high-position strip opening, the supporting end 2034041 on the supporting wheel 203404 is located inside the feed pipe 201, and the supporting end 2034041 supports the lowest nut. When the supporting wheel 203404 rotates, the positioning wheel 203403 rotates synchronously, that is, the supporting wheel 203404 rotates to the side notch 203405. When 3405 is aligned with the lower slot, the locking end 2034031 on the locking wheel 203403 enters the feed pipe 201 after passing through the higher slot. At this time, the locking end 2034031 supports the second-lower nut. In this embodiment, there are several locking wheels 203403 and several supporting wheels 203404, and each locking wheel 203403 has a chamfer at its edge. The chamfer makes it easier to squeeze the edge of the locking wheel 203403 into the feed pipe 201 between two adjacent nuts. However, it should be noted that when the locking wheel 203403 and the supporting wheel 203404 are aligned, the locking end 2034031 enters the feed pipe 201 between two adjacent nuts. When 03404 rotates synchronously, the supporting end 2034041 will only completely separate from the lowest nut after the locking end 2034031 is completely located between the lowest nut and the second lowest nut. In this way, when the locking end 2034031 is squeezed between the lowest nut and the second lowest nut, the lowest nut is limited by the supporting end 2034041, so the second lowest nut and the nut above it can be displaced upward. This can apply an upward lifting force to the nuts stacked in the feed tube 201, so that the stacked nuts can be displaced slightly, and the nuts are prevented from getting stuck in the feed tube 201.

[0053] Since the positioning wheel 203403 and the support wheel 203404 need to be controlled by the ring gear 203402 to rotate, auxiliary gears are fixed on both the positioning wheel 203403 and the support wheel 203404. Two gear rings 203406 are connected to the feed pipe 201. The outer and inner circumferential surfaces of the gear rings 203406 are provided with convex teeth. The convex teeth on the inner circumferential surface of the gear rings 203406 mesh with the auxiliary gears, while the convex teeth on the outer circumferential surface of the gear rings 203406 mesh with the ring gears. Thus, when the cylindrical body rotates, it can drive the positioning wheel 203403 and the support wheel 203404 to rotate synchronously.

[0054] When feeding nuts using the above-mentioned feeding device and conveying device, the feeding pipe 201 of the conveying device and the guide shaft 301 of the feeding device are both inserted into the blind cavity of the engine. At this time, the feeding pipe 201 can be in a state where nuts are already stored or in a state where nuts are not filled. If nuts are already stored in the feeding pipe 201, the guide shaft 301 can be controlled to rotate, driving the telescopic rod 302 and the cylindrical protrusion 304 to move, so that the cylindrical protrusion 304 moves directly below the feeding pipe 201. For ease of operation, a positioning stop can be directly set on the guide shaft 301. When the guide shaft 301 rotates to the state where the cylindrical protrusion 304 and the feeding pipe 201 are coaxial, the positioning stop contacts the feeding pipe 201, and at this time the steering shaft cannot continue to rotate in the original direction.

[0055] If the lower end of the feed pipe 201 is located inside the engine blind cavity and no nut is filled inside the feed pipe 201, then a nut can be filled into the feed pipe 201 from the outside of the engine blind cavity.

[0056] Then, by controlling the rotation of the guide shaft 301, the cylindrical protrusion 304 is made coaxial with the feed pipe 201. Then, by controlling the upward movement of the guide shaft 301, the cylindrical protrusion 304 reaches the receiving position. At this time, the swing rod 2032 drives the baffle 2034 to rotate, switching the feed pipe 201 from the storage state to the discharge state, so that the nut in the feed pipe 201 is discharged and falls on the cylindrical protrusion 304. Then, after controlling the guide shaft 301 to move downward, the guide shaft 301 rotates in the opposite direction, so that the cylindrical protrusion 304 moves to the bottom of the nut locking assembly 1. At this time, the cylindrical protrusion 304 is coaxial with the nut positioning part on the nut locking assembly 1. Then, the guide shaft 301 can be moved upward again to position and align the nut with the nut on the nut locking assembly 1.

[0057] See 2. Figure 3 , Figure 11 and Figure 12As shown in this application, when the nut is filled into the feed tube 201, a guide groove 20101 is provided on the inner wall of the feed tube 201. The guide groove 20101 extends along the length of the feed tube 201, and there are at least two guide grooves 20101. A guide assembly is installed in the feed tube 201. That is, the nut is first filled onto the guide assembly, and then the stacked nut is loaded into the feed tube 201 through the guide assembly. During this process, the nut will not contact the inner wall of the feed tube 201, so as to avoid the nut becoming tilted and stuck during the downward movement.

[0058] The guiding assembly includes a central guide rod 701 and a top plate 702. The top plate 702 is fixed to the upper part of the central guide rod 701. An outer guide rod 703 is also fixed on the top plate 702. The outer guide rods 703 are parallel to the central guide rod 701, and the number of outer guide rods 703 is the same as the number of central guide rods 701. Several nuts can be first fitted onto the central guide rod 701. An end notch is provided at the free end of the outer guide rod 703. A locking rod 704 is hinged at the end notch of the outer guide rod 703. An elastic component is connected between the locking rod 704 and the outer guide rod 703. The elastic component can be a spring or a torsion spring, which is mainly used to provide force to the locking rod 704. When the elastic component is in its normal state, the locking rod 704 is perpendicular to the outer guide rod 703. At this time, the inner end of the locking rod 704 passes through the end notch and contacts the end face of the nut, thereby completing the assembly of the nut on the guiding assembly.

[0059] A locking protrusion 20102 is provided inside the feed pipe 201. The locking protrusion 20102 is located in the guide groove near the lower end. As the guide component is inserted from the upper end of the feed pipe 201 and moves downward, the outer end of the locking rod 704 moves in the guide groove 20101. When the outer end of the locking rod 704 contacts the locking protrusion 20102, the locking protrusion 20102 hinders the continued movement of the locking rod 704. However, as the guide component continues to be inserted into the feed pipe 201, the locking rod 704 eventually flips, allowing the guide component to continue to be inserted a short distance. When the inner end of the locking rod 704 abuts against the bottom end of the guide groove, the top plate 702 is located in the feed inlet at the top of the feed pipe 201. At this time, the nut inside the feed pipe 201 can slide off under its own weight and will not get stuck inside the feed pipe 201.

[0060] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0061] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A nut feeding device for the blind cavity of an aero-engine, characterized in that, include: The conveying device is used to feed the nut into the engine blind cavity and store the nut. After the nut is discharged from the lower end, it is positioned in the engine blind cavity and can move freely. The feeding device includes a cylindrical protrusion (304), which is used to receive the nut in the engine blind cavity and can drive the nut to make circular and vertical movements so that the nut can be connected with the nut locking assembly (1). The conveying device includes: The feed tube (201) has a vertical conveying channel inside, which is used to store nuts; A rotating stop mechanism is connected to the feed pipe (201) and is used to position and constrain the nuts in the conveying channel; A drive assembly, connected to the feed pipe (201), is used to enable the feed pipe (201) and the rotary stop mechanism to move vertically simultaneously; The driving component includes: The bushing (2021) allows the feed tube (201) to pass through the bushing (2021); The lifting system support (2022) is connected to the upper end of the bushing (2021); A drive motor (2023) is mounted on a lifting system support (2022), and a drive gear (2024) is fixed on the output shaft of the drive motor (2023). A rack (2025) is disposed on the outer wall of the feed pipe (201) and extends along the length of the feed pipe (201) for meshing with the drive gear (2024).

2. The nut feeding device inside the blind cavity of an aero-engine according to claim 1, characterized in that, The rotary stop mechanism includes: The swing arm (2032) is parallel to the feed tube (201) and is rotatable; The transmission system support (2031) is installed at the upper end of the feed pipe (201) and connected to the swing rod (2032); The stopper (2034) is connected to the swing rod (2032), which causes the swing rod (2032) to drive the stopper (2034) to move, thereby constraining the position of the nut in the conveying channel.

3. The nut feeding device inside the blind cavity of an aero-engine according to claim 1, characterized in that, The feeding device further includes: A guide shaft (301) is connected to a cylindrical protrusion (304) for moving the cylindrical protrusion (304); Telescopic rod (302) is connected to guide shaft (301) and is used to support cylindrical protrusion (304). A transmission assembly for controlling the movement of the guide shaft (301).

4. The nut feeding device inside the blind cavity of an aero-engine according to claim 3, characterized in that, The transmission assembly includes: The roller sleeve (3033) is coupled to the guide shaft (301) and has a rotating gear (3034) docked at its upper end. The guide bar (3035) is pushed to mesh with the rotating gear (3034). When the guide bar (3035) is pushed to translate, the guide shaft (301) rotates.

5. The nut feeding device inside the blind cavity of an aero-engine according to claim 4, characterized in that, The transmission assembly also includes: Gear grooves are provided on the guide shaft (301) and arranged along the length direction of the guide shaft (301); The lifting motor (3038) is connected to the lifting gear (3039), which meshes with the tooth groove of the guide shaft (301) to make the guide shaft (301) move axially.

6. A method for feeding nuts inside a blind cavity of an aero-engine, using the nut feeding device for an aero-engine blind cavity as described in any one of claims 1-5, characterized in that, The method includes the following steps: Insert the lower ends of the conveying device and the feeding device into the engine blind cavity, and adjust the horizontal height of the lower ends of both. The cylindrical protrusion (304) is moved downwards from the conveying device so that the cylindrical protrusion (304) is located directly below the lower end of the conveying device; The nut is conveyed into the engine blind cavity through a conveying device, so that the nut is discharged from the conveying device and falls on the cylindrical protrusion (304); Control the cylindrical protrusion (304) and nut to move in the opposite direction above the assembly position; The control column protrusion (304) moves upward, causing the nut to move upward, so that the nut is assembled on the nut locking assembly (1).

7. The method for feeding nuts inside the blind cavity of an aero-engine according to claim 6, characterized in that, The conveying device stores nuts in a stacked state.

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