A locking structure

Abstract

This invention provides a locking structure for locking a locked component (3) and a gearbox housing (4). The locking structure includes a locking screw (1) and an anti-rotation wedge (2). The locking screw (1) includes a threaded portion at the bottom and a bent lug portion at the top. An axial groove is provided on the threaded portion, and the anti-rotation wedge (2) is engaged in the groove. The tip of the anti-rotation wedge (2) faces the bottom of the threaded portion, and the height of the highest point of the anti-rotation wedge (2) exceeds the depth of the groove. The bent lug portion is a hollow structure. When the threaded portion is locked, the bent lug portion bends outward and engages in the limiting groove on the top surface of the locked component (3). This structure has the advantages of small space requirements, simple installation, and few parts, improving the design accessibility and reliability of the gearbox locking structure.

Description

Technical Field

[0001] This invention relates to the field of aviation transmission technology, specifically to a locking structure that prevents two connecting parts from moving relative to each other. Background Technology

[0002] During the operation of a transmission mechanism, both the external working environment and internal gear transmission will generate impacts and vibrations. Although many methods are used to minimize impacts and vibrations, vibration is unavoidable. Therefore, the threaded pair must have the characteristic of preventing relative rotation. The essence of anti-loosening is to prevent relative rotation between the threaded pairs.

[0003] The main existing anti-loosening structures are shown below. Figure 1 It includes: 10 nuts, 20 anti-loosening washers and 30 bolts.

[0004] This type of anti-loosening structure has the problem of being complex and having many structural components. Summary of the Invention

[0005] The technical solution of the present invention is to provide a locking structure that solves the problems of complex structure and numerous structural components in existing anti-loosening structures.

[0006] This invention provides a locking structure for locking the connection between the locked component 3 and the gearbox housing 4; the locking structure includes: a locking screw 1 and an anti-rotation wedge 2; wherein, The locking screw 1 includes a threaded portion at the bottom and a bent lug portion at the top; An axial groove is provided on the threaded part, and the anti-rotation wedge 2 is engaged in the groove. The tip of the anti-rotation wedge 2 faces the bottom of the threaded part, and the height of the highest point of the anti-rotation wedge 2 exceeds the depth of the groove. The bent lug part is a hollow structure. When the threaded part is locked, the bent lug part bends outward and gets into the limiting groove on the top surface of the locked component 3.

[0007] Optionally, a square hole is provided at the center bottom of the bent ear portion.

[0008] Optionally, the top of the bent ear portion is annular.

[0009] Optionally, the top of the bent ear portion has a split structure.

[0010] Optionally, when the threaded part is locked, one of the folded lugs bends outward and gets into the limiting groove on the top surface of the locked member 3.

[0011] Optionally, when the threaded part is tightened, one of the lobes of the bent lug is bent outward at a preset angle.

[0012] Optionally, the surface of the locking screw 1 is silver-plated.

[0013] Optionally, thread-locking compound is applied to the threads of the locking screw 1.

[0014] Optionally, the threaded bottom hole of the gearbox housing 4 is machined with a vent hole.

[0015] Optionally, the locking screw 1 is made of soft stainless steel.

[0016] This invention provides a locking structure with wide applications in the mechanical field. Existing locking structures that offer good locking performance and are difficult to loosen are mostly complex in structure, have a large number of parts, are complicated to install, require ample installation space, and are costly to manufacture. This invention, however, features small space requirements, simple installation, and fewer parts, improving the design accessibility and reliability of gearbox locking structures. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. The drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of the background technology of this invention; Figure 2 This is a schematic diagram of the installation of the locking structure of the present invention; Figure 3 This is a schematic diagram of the locking screw of the present invention; Figure 4 This is a schematic diagram of the anti-rotation wedge block of the present invention; Explanation of reference numerals in the attached figures: 10—Nuts; 20—Anti-loosening washer; 30—Screw pile; 1—Locking screw; 2—Anti-rotation wedge block; 3—The locked component; 4—Gearbox housing. Detailed Implementation

[0019] 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.

[0020] The features and illustrative embodiments of various aspects of the present invention will now be described in detail. Numerous specific details are set forth in the following detailed description to provide a thorough understanding of the invention. However, it will be apparent to those skilled in the art that the invention may be practiced without requiring some of these specific details. The following description of embodiments is merely intended to provide a better understanding of the invention by illustrating examples of the invention. The invention is by no means limited to any specific setups and methods set forth below, but covers any improvements, substitutions, and modifications to structures, methods, and devices without departing from the spirit of the invention. Well-known structures and techniques are not shown in the drawings and the following description to avoid unnecessarily obscuring the invention.

[0021] In the description of this invention, it should be noted that the directions or positional relationships indicated by terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing and simplifying the invention, and should not be construed as limiting the invention. Furthermore, the use of ordinal numbers (e.g., "first and second," etc.) is for distinguishing objects and is not limited to this order, and should not be construed as indicating or implying relative importance.

[0022] 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, encompassing both direct connection and indirect connection via an intermediate medium. Those skilled in the art can understand the specific meaning of these terms in this invention based on the specific circumstances.

[0023] It should be noted that, unless otherwise specified, the embodiments of the present invention and the features thereof can be combined with each other, and the various embodiments can be referenced and cited in each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0024] The present invention will be further described in detail below with reference to the embodiments and accompanying drawings, but the embodiments of the present invention are not limited thereto.

[0025] like Figure 2-4 As shown, the present invention provides a locking structure for locking the connection between the locked component 3 and the gearbox housing 4; the locking structure includes: a locking screw 1 and an anti-rotation wedge 2; wherein, The locking screw 1 includes a threaded portion at the bottom and a bent lug portion at the top; An axial groove is provided on the threaded part, and the anti-rotation wedge 2 is engaged in the groove. The tip of the anti-rotation wedge 2 faces the bottom of the threaded part, and the height of the highest point of the anti-rotation wedge 2 exceeds the depth of the groove. The bent lug part is a hollow structure. When the threaded part is locked, the bent lug part bends outward and gets into the limiting groove on the top surface of the locked component 3.

[0026] Optionally, a square hole is provided at the center bottom of the bent ear portion.

[0027] Optionally, the top of the bent ear portion is annular.

[0028] Optionally, the top of the bent ear portion has a split structure.

[0029] Optionally, when the threaded part is locked, one of the folded lugs bends outward and gets into the limiting groove on the top surface of the locked member 3.

[0030] Optionally, when the threaded part is tightened, one of the lobes of the bent lug is bent outward at a preset angle.

[0031] Optionally, the surface of the locking screw 1 is silver-plated.

[0032] Optionally, thread-locking compound is applied to the threads of the locking screw 1.

[0033] Optionally, the threaded bottom hole of the gearbox housing 4 is machined with a vent hole.

[0034] Optionally, the locking screw 1 is made of soft stainless steel.

[0035] This invention provides an effective locking structure, including a gearbox housing 4, a locked component 3, a locking screw 1, and an anti-rotation wedge 2. The locking screw 1 locks the locked component onto the gearbox housing 4 through threads and an anti-loosening structure, thus fastening the locked component 3 to the gearbox housing 4 together. The locked component 3 is locked with the fewest possible parts, which has outstanding advantages for compact structures and small spaces.

[0036] The present invention uses the anti-rotation wedge block 2 to lock the locking screw 1, thereby preventing relative rotation between the gearbox housing and the locked component.

[0037] The locking screw 1 of this invention has a square hole design in its inner hole, which can be screwed into the threaded hole of the gearbox housing 4 using a square head tool, thus improving manufacturability.

[0038] The locking screw 1 of this invention adopts an ear-type structure to prevent axial transmission. It is pressed by the locked component to prevent the locking screw from moving axially or coming out of the gearbox body.

[0039] The locking screw 1 of the present invention adopts a split structure at the flange. The locking screw 1 is locked by stamping the flange outward. The locking screw 1 is locked by bending the lug at the flange. The locking screw 1 is locked to prevent rotation by bending the lug and is embedded in the locked component.

[0040] The locking screw 1 of this invention is silver-plated to prevent cold welding when it is screwed into the gearbox housing 4, which would cause the screw to fall into the threaded hole of the gearbox housing 4 and stick together.

[0041] The present invention applies thread-locking agent to the threaded part of the locking screw 1, and after tightening, the locking screw 1 is bonded to the threaded hole of the gearbox housing 4, which isolates the inside of the gearbox from the outside of the gearbox housing 4, and performs a sealing function to prevent lubricating oil or gas from escaping from the threaded part.

[0042] The present invention processes an exhaust hole in the threaded bottom hole of the gearbox housing 4 to avoid excessive air pressure in the threaded hole of the gearbox housing 4 and to avoid excessive internal stress in the gearbox housing 4.

[0043] The locking screw 1 of this invention is made of soft stainless steel, which is easy to bend and not easy to break, and has better manufacturing cost and processability.

[0044] This invention provides a locking structure for locking the connection between the locked component 3 and the gearbox housing 4. The locking structure includes a locking screw 1 and an anti-rotation wedge 2. The locking screw 1 includes a threaded portion at the bottom and a bent lug portion at the top. The threaded portion has an axial groove, and the anti-rotation wedge 2 is engaged in the groove. The tip of the anti-rotation wedge 2 faces the bottom of the threaded portion, and the height of the highest point of the anti-rotation wedge 2 exceeds the depth of the groove. The bent lug portion is a hollow structure. When the threaded portion is locked, the bent lug portion bends outward and engages in the limiting groove on the top surface of the locked component 3.

[0045] A square hole is provided at the center bottom of the bent lug portion. The top of the bent lug portion is annular. The top of the bent lug portion has a split structure. When the threaded part is tightened, one of the split lobes of the bent lug portion bends outward and engages in the limiting groove on the top surface of the locked component 3. When the threaded part is tightened, one of the split lobes of the bent lug portion bends outward at a preset angle. The surface of the locking screw 1 is silver-plated. Thread fastener is applied to the threads of the locking screw 1. A vent hole is machined into the threaded bottom hole of the gearbox housing 4. The locking screw 1 is made of soft stainless steel.

[0046] This invention provides a locking structure with wide applications in the mechanical field. Existing locking structures that offer good locking performance and are difficult to loosen are mostly complex in structure, have a large number of parts, are complicated to install, require ample installation space, and are costly to manufacture. This invention, however, features small space requirements, simple installation, and fewer parts, improving the design accessibility and reliability of gearbox locking structures.

[0047] The above detailed embodiments are a description of the present invention. It should not be considered that the specific embodiments of the present invention are limited to these descriptions. For those skilled in the art, several simple deductions and substitutions can be made without departing from the concept of the present invention, and all of these should be considered to fall within the protection scope of the present invention.

Claims

1. A locking structure, characterized in that, A locking connection applied to the locked component (3) and the gearbox housing (4); the locking structure includes: a locking screw (1) and an anti-rotation wedge (2); wherein, The locking screw (1) includes a threaded portion at the bottom and a bent lug portion at the top; The threaded part is provided with an axial groove, and the anti-rotation wedge (2) is stuck in the groove. The tip of the anti-rotation wedge (2) faces the bottom of the threaded part, and the height of the highest point of the anti-rotation wedge (2) exceeds the depth of the groove. The bent ear portion is a hollow structure. When the threaded portion is locked, the bent ear portion bends outward and is inserted into the limiting groove on the top surface of the locked component (3).

2. The locking structure according to claim 1, characterized in that, A square hole is provided at the bottom center of the bent ear section.

3. The locking structure according to claim 1, characterized in that, The top of the bent ear piece is ring-shaped.

4. The locking structure according to claim 1, characterized in that, The top of the bent ear piece has a split structure.

5. The locking structure according to claim 4, characterized in that, When the threaded part is locked, one of the folded lugs bends outward and gets into the limiting groove on the top surface of the locked member (3).

6. The locking structure according to claim 5, characterized in that, When the threaded part is tightened, one of the lobes of the bent lug bends outward at a preset angle.

7. The locking structure according to claim 1, characterized in that, The surface of the locking screw (1) is silver plated.

8. The locking structure according to claim 1, characterized in that, The threads of the locking screw (1) are coated with thread-locking agent.

9. The locking structure according to claim 1, characterized in that, The threaded bottom hole of the gearbox housing (4) is machined with an exhaust hole.

10. The locking structure according to claim 1, characterized in that, The locking screw (1) is made of soft stainless steel.

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