CN212351797U

CN212351797U - Fastening assembly easy to assemble and disassemble

Info

Publication number: CN212351797U
Application number: CN202021117143.8U
Authority: CN
Inventors: 涂卫强; 郑思凯; 朱亮; 李志平
Original assignee: AECC Commercial Aircraft Engine Co Ltd
Current assignee: AECC Commercial Aircraft Engine Co Ltd
Priority date: 2020-06-16
Filing date: 2020-06-16
Publication date: 2021-01-15
Anticipated expiration: 2030-06-16

Abstract

The utility model provides an easily assemble fastening components who decomposes for realize the quick high quality assembly of aeroengine axle class interference fit spare. The fastening assembly includes: a process nut having a plurality of pin holes on an outer peripheral side surface; a wrench including a ring portion having a plurality of perforations in a circumferential direction and a handle extending outward from an outer circumferential surface of the ring portion; and a plurality of pins corresponding to the plurality of pin holes and the plurality of through holes, respectively; the annular part is sleeved on the outer peripheral side surface of the process nut, the plurality of pin holes and the plurality of through holes are respectively aligned, and the plurality of pins respectively penetrate through the plurality of through holes and are in threaded connection with the plurality of pin holes.

Description

Fastening assembly easy to assemble and disassemble

Technical Field

The utility model relates to an aeroengine assembling tool technical field, concretely relates to a fastening component for realizing assembly of engine shaft class interference fit piece.

Background

As shown in fig. 1, an interference fit 20 is fixed on a journal 10 of an aircraft engine rotating shaft in an interference fit manner, the interference fit 20 includes a bearing front seal ring 21 and a bearing inner ring 22, in order to ensure that the seal ring 21 and the bearing inner ring 22 are assembled in place, a hot-pack mode is usually adopted, the seal ring 21 and the bearing inner ring 22 are assembled on the journal 10 after being heated, and then contact surfaces are pressed and attached in a pressing manner by an annular process nut (not shown in fig. 1). The process nut is large in thread diameter and can be compressed and decomposed only by large external force, so that the process nut is difficult to assemble and decompose by using tools such as a universal wrench.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an easily assemble fastening components who decomposes for realize aeroengine axle class interference fit's quick high quality assembly.

To achieve the object, a fastening assembly for fastening an interference fit on a journal of an aircraft engine shaft comprises: a process nut having a plurality of pin holes on an outer peripheral side surface; a wrench including a ring portion having a plurality of perforations in a circumferential direction and a handle extending outward from an outer circumferential surface of the ring portion; and a plurality of pins corresponding to the plurality of pin holes and the plurality of through holes, respectively; the annular part is sleeved on the outer peripheral side surface of the process nut, the plurality of pin holes and the plurality of through holes are respectively aligned, and the plurality of pins respectively penetrate through the plurality of through holes and are in threaded connection with the plurality of pin holes.

In one or more embodiments of the fastening assembly, an inner peripheral edge of a top end of the ring portion is provided with an inner rib by which a top end of the process nut bears the wrench.

In one or more embodiments of the fastener assembly, the inner rib is disposed partially along the inner peripheral edge.

In one or more embodiments of the fastener assembly, the inner rib is disposed about the entire circumference of the inner peripheral edge.

In one or more embodiments of the fastening assembly, the plurality of pin holes are uniformly distributed on the peripheral side surface of the process nut and are located on a middle section of the process nut; the plurality of perforations are evenly distributed in the circumferential direction of the annular portion.

In one or more embodiments of the fastening assembly, the handle extends in a direction of diametrical extension of the loop.

In one or more embodiments of the fastening assembly, an inner circumferential surface of the annular portion partially abuts an outer circumferential surface of the process nut.

In one or more embodiments of the fastening assembly, an inner circumferential surface of the annular portion completely conforms to an outer circumferential surface of the process nut.

In one or more embodiments of the fastening assembly, the bore is provided with an internal thread for connection with the pin.

The utility model discloses a fastening components links together technology nut and spanner through a plurality of pins, connects simply reliably. The handle extends outwards from the peripheral surface of annular portion and forms the arm of force, can exert great moment on the handle, drives the rotation of technology nut, realizes the assembly and the decomposition of technology nut. The fastening assembly is simple in structure, low in machining and manufacturing cost, convenient to operate and high in assembly and disassembly efficiency, and can realize quick high-quality assembly of the interference fit piece of the shaft of the aero-engine.

Drawings

The above and other features, properties and advantages of the present invention will become more apparent from the following description of the embodiments with reference to the accompanying drawings, in which:

FIG. 1 is a schematic view of the connection relationship between a journal and an interference fit of a rotating shaft of an aircraft engine according to the prior art.

FIG. 2 is a schematic view of a fastening assembly according to one or more embodiments.

FIG. 3 is a perspective view of an attachment relationship of a fastener assembly according to one or more embodiments.

FIG. 4 is a cross-sectional view of an attachment relationship of a fastener assembly according to one or more embodiments.

Detailed Description

The following discloses many different embodiments or examples for implementing the subject technology described. Specific examples of components and arrangements are described below to simplify the present disclosure, but these are merely examples and are not intended to limit the scope of the present invention. For example, if a first feature is formed over or on a second feature described later in the specification, this may include embodiments in which the first and second features are formed in direct contact, and may also include embodiments in which additional features are formed between the first and second features, such that the first and second features may not be in direct contact. Additionally, reference numerals and/or letters may be repeated among the various examples throughout this disclosure. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. Further, when a first element is described as being coupled or coupled to a second element, the description includes embodiments in which the first and second elements are directly coupled or coupled to each other, as well as embodiments in which one or more additional intervening elements are added to indirectly couple or couple the first and second elements to each other. It is to be understood that the spatial relationship terms used in the specification are intended merely for convenience in description, and may encompass other orientations of the elements in addition to the orientation depicted in the figures. For example, if an element is turned over, elements described as "front," "front," or "front" of other elements or features may be oriented "rear" of the other elements or features, or turned over at a particular angle, may be oriented "left," "lower left," "right," etc. of the other elements or features. It is to be understood, moreover, that the drawings are designed solely for purposes of illustration and not as a definition of the limits of the invention, for which reference should be made to the appended claims.

Referring to fig. 2 to 4, the fastening assembly 30 of the present invention is used for fastening an interference fit 20 on a journal 10 of an aircraft engine shaft, and comprises a process nut 3, a wrench 4 and a plurality of pins 5. The outer peripheral side surface 32 of the process nut 3 has a plurality of pin holes 31. The wrench 4 includes a ring portion 41 and a handle 42, the ring portion 41 having a plurality of perforations 43 in a circumferential direction, the handle 42 extending outwardly from an outer circumferential surface 411 of the ring portion 41. The plurality of pins 5 correspond to the plurality of pin holes 31 and the plurality of through holes 43, respectively.

When the process nut 3 is assembled and disassembled by using the wrench 4, the ring-shaped portion 41 of the wrench 4 is fitted over the outer peripheral side surface 32 of the process nut 3, the plurality of pin holes 31 and the plurality of through holes 43 are respectively aligned, and the plurality of pins 5 are respectively inserted through the plurality of through holes 43 and threadedly coupled to the plurality of pin holes 31, so that the process nut 3 and the wrench 4 are coupled together with simple and reliable coupling. The handle 42 extends outwards from the outer peripheral surface 411 of the annular part 41 to form a force arm, so that a large moment can be applied to the handle 42 to drive the process nut 3 to rotate, and the process nut 3 is assembled and disassembled.

Referring to fig. 2 and 4, the inner peripheral edge 412 of the top end of the ring portion 41 is provided with an inner rib 412a, and the top end of the process nut 3 holds the spanner 4 by the inner rib 412 a. The inner rib 412a may be provided on the entire periphery of the inner peripheral edge 412 or may be provided on a part of the inner peripheral edge 412 as long as the wrench 4 can be held by the inner rib 412 a. Therefore, the inner flange 412a can be used as a mistake-proofing device and a protection device, which can prevent the spanner 4 from being wrongly assembled and can avoid the spanner 4 from slipping off due to misoperation to cause damage to precision parts such as bearings.

With continued reference to fig. 2 to 4, a plurality of pin holes 31 are evenly distributed on the outer peripheral side surface 32 of the process nut 3 on the middle cross section in the thickness direction of the process nut 3, and a plurality of perforations 43 are evenly distributed in the circumferential direction of the annular portion 41. Therefore, the technical nut 3 and the plurality of pins 5 can be uniformly stressed, and deformation, fracture or blocking caused by excessive local stress can be avoided.

Referring to fig. 2 and 3, the grip 42 extends in the diametrical extension direction of the ring portion 41, whereby the direction of the force applied to the grip 42 can be made the same as the rotation direction of the process nut 3 to obtain a better force state.

Referring to fig. 3 and 4, the inner circumferential surface 413 of the annular portion 41 and the outer circumferential side surface 32 of the process nut 3 may be configured to partially abut, so that the process nut 3 may be driven to rotate by the friction force between the inner circumferential surface 413 and the outer circumferential side surface 32, so as to reduce the stress on the pin 5, and avoid the pin 5 from being deformed due to an excessive stress, which may result in difficulty in disassembling the pin 5, the process nut 3 and the wrench 4; further, the gap is present between the non-fitted portion of the inner peripheral surface 413 and the outer peripheral side surface 32, which facilitates quick fitting of the wrench 4 onto the process nut 3 through the annular portion 41.

The inner peripheral surface 413 of the annular portion 41 and the outer peripheral side surface 32 of the process nut 3 may also be provided to completely fit, whereby the frictional force between the inner peripheral surface 413 and the outer peripheral side surface 32 may be further increased, reducing the force applied to the pin 5.

As will be understood from fig. 2, the through hole 43 is provided with the internal thread 431 for connection with the pin 5, whereby the pin 5 can be assembled in advance on the wrench 4 without the head of the pin 5 exceeding the inner peripheral surface 413 of the wrench 4, so that the pin 5 can be stored, and the tightening time in assembling and disassembling the process nut 3 can be reduced, improving efficiency.

Referring to fig. 3 and 4, the operation steps of assembling the nut 3 by using the wrench 4 of the present invention are as follows:

1. screwing the pin 5 onto the wrench 4 so that the head of the pin 5 does not go beyond the inner peripheral surface 413 of the wrench 4;

2. the wrench 4 is sleeved on the peripheral side surface 32 of the process nut 3 from the top end of the process nut 3 through the annular part 41, so that the wrench 4 is supported by the top end of the process nut 3 through the inner rib 412a, and the damage to precision parts such as bearings and the like caused by the fact that the wrench 4 slides down due to misoperation is avoided;

3. turning the wrench 4 so that the pin 5 is aligned with the pin hole 31 of the outer peripheral side surface 32 of the process nut 3;

4. tightening the pin 5 so that the pin 5 is inserted into the pin hole 31 of the outer peripheral side surface 32 of the process nut 3;

5. the technical nut 3 is driven to rotate by adding an extension rod at the handle 42 of the wrench 4 or hammering the handle 42 by a hammer, so that the binding surface of the interference fit 20 is pressed;

6. loosening the pin 5 so that the pin 5 is disengaged from the pin hole 31 of the outer peripheral side surface 32 of the process nut 3;

7. the spanner 4 is removed from the outer peripheral side surface 32 of the process nut 3 from the tip end of the process nut 3.

Adopt the utility model discloses a spanner 4 decomposes operation step of technology nut 3 similar with above-mentioned step, only application of force opposite direction.

Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, any modification, equivalent changes and modifications made to the above embodiments according to the technical spirit of the present invention, all without departing from the content of the technical solution of the present invention, fall within the scope of protection defined by the claims of the present invention.

Claims

1. Fastening subassembly of easy assembly decomposition for fastening interference fit spare on the axle journal of aeroengine pivot, its characterized in that includes:

a process nut having a plurality of pin holes on an outer peripheral side surface;

a wrench including a ring portion having a plurality of perforations in a circumferential direction and a handle extending outward from an outer circumferential surface of the ring portion; and

a plurality of pins corresponding to the plurality of pin holes and the plurality of through holes, respectively;

the annular part is sleeved on the outer peripheral side surface of the process nut, the plurality of pin holes and the plurality of through holes are respectively aligned, and the plurality of pins respectively penetrate through the plurality of through holes and are in threaded connection with the plurality of pin holes.

2. The fastener assembly of claim 1, wherein an inner peripheral edge of a top end of the ring portion is provided with an inner rib by which a top end of the craft nut bears against the wrench.

3. The fastener assembly of claim 2, wherein said inner rib is disposed partially along said inner peripheral edge.

4. The fastener assembly of claim 2, wherein said inner rib is disposed about the entire circumference of said inner peripheral edge.

5. The fastener assembly of claim 1, wherein said plurality of pin holes are uniformly distributed on said peripheral side surface of said process nut and are located on a mid-section of said process nut; the plurality of perforations are evenly distributed in the circumferential direction of the annular portion.

6. The fastener assembly of claim 1, wherein said handle extends in a direction of diametrical extension of said loop portion.

7. The fastener assembly of claim 1, wherein an inner peripheral surface of the annular portion partially abuts an outer peripheral surface of the craft nut.

8. The fastener assembly of claim 1, wherein an inner peripheral surface of the annular portion completely conforms to an outer peripheral surface of the craft nut.

9. A fastening assembly according to claim 1, wherein the bore is provided with an internal thread for connection with the pin.