A squeeze-fastening self-locking bushing

Abstract

An extruded fastening self-locking bushing, the present invention relates to the field of aircraft assembly, and specifically to an extruded fastening self-locking bushing, comprising a first bushing and a second bushing; the first bushing comprises a first mounting plate, a mounting column and a first matching platform; the mounting column is arranged on one side of the first mounting plate, and is provided with an assembly hole; the first matching platform surrounds the mounting column; a first ratchet ring is provided on the first matching platform; the second bushing comprises a second mounting plate and a plurality of second matching platforms; the second mounting plate is provided with a mounting hole; the second matching platform is arranged around the mounting hole; an expansion groove is provided between adjacent second matching platforms; a second ratchet ring is provided around the mounting hole on the second matching platform. The invention solves the problem that the installation of general bushings is time-consuming and labor-intensive and has safety risks, the efficiency is low during the assembly and maintenance of aircraft, which affects the efficiency and accuracy of the operation, and it is easy to fall off and shake. When the bushing is deformed, the shaft therein is damaged, thereby affecting the safety of the aircraft operation.

Description

Technical Field

[0001] The invention relates to the field of aircraft assembly, in particular to an extrusion-type fastening self-locking bushing. Background Art

[0002] In the field of aircraft assembly, bushings play a role in positioning and fixing, ensuring accurate docking and firm connection between aircraft components. Through the precise design and installation of bushings, the overall stability and safety of the aircraft structure can be guaranteed. The aircraft will be subject to various forces during flight. Bushings need to have good wear resistance to reduce friction and wear between components. They can also play a role in buffering and shock absorption, absorbing the impact and vibration generated by the aircraft during flight, helping to protect aircraft components from damage and extend the service life of the aircraft.

[0003] Some bushings use complex fastening methods, such as interference fit, threaded connection, etc., which increases the difficulty of installation and removal. During the installation process, special tools and techniques may be required, which increases the assembly cost and time; once the bushing is installed on the aircraft, it may be very difficult to remove due to the complexity of its fastening method. This may result in more time and resources required when repairing or replacing the bushing. In this case, the bushing needs to be designed to facilitate installation and removal to simplify the aircraft assembly and maintenance process.

[0004] In the installation of bushings in key parts of current components, the tolerance manufacturing of the bushings and the experience of the fitter are particularly tested, which places great demands on the stability of the process methods and techniques. In a sense, the stability of the process plan, tools or techniques determines the accuracy of the installation of the component bushings. The prior art generally uses liquid nitrogen cooling installation or cold extrusion installation for bushing installation; liquid nitrogen installation of bushings is highly risky, and a little carelessness may cause bushing installation deviation or personal injury, etc.; while cold extrusion installation is assembled by interference fit, and it is easy to cause deformation of the parts and holes at the installation location by extrusion installation, which is difficult to apply to high-precision use environments, and bushings are installed by knocking, hammering and extrusion with conventional tools relying on the experience of fitters, which may cause the bushing to be installed at an angle, causing the old hole to be extruded and deformed, and thus the parts are scrapped, and the existing bushings are generally one-piece structures without shoulders or with shoulders on a single head, so that they can only be installed from one side of the workpiece, and at most can only ensure that the bushing does not fall off from one side of the workpiece, and it is easy to fall off and shake after the bushing is used frequently, affecting the efficiency and accuracy of the operation; and when the workpiece at the bushing installation location is deformed by external forces and other factors, the bushing is easily deformed, and thus the shaft protected by the bushing is damaged. Summary of the invention

[0005] The purpose of the present invention is to provide an extruded fastening self-locking bushing, which solves the problems that the installation of general bushings is time-consuming, labor-intensive and has safety risks, is inefficient during aircraft assembly and maintenance, affects the efficiency and accuracy of operations, is easy to fall off and shake during operation, and when the bushing is deformed, the shaft therein is easily damaged, thereby affecting the safety of aircraft operation.

[0006] The embodiments of the present invention are implemented by the following technical solutions:

[0007] An extrusion-type fastening self-locking bushing, comprising:

[0008] The first bushing comprises a first mounting plate, a mounting column and a first matching platform; the mounting column is arranged on one side of the first mounting plate, and the mounting column is provided with a mounting hole with two ends passing therethrough inside; the first matching platform is arranged on one side of the first mounting plate and is arranged around the mounting column; a circle of space is left between the outer edge of the first matching platform and the edge of the first mounting plate; a first ratchet ring is provided at one end of the first matching platform; a thread is provided on the outer wall of one end of the mounting column;

[0009] The second bushing includes a second mounting plate and a plurality of second mating platforms; a mounting hole is provided on the second mounting plate, and a thread is provided on the inner wall thereof; the second mating platform is arranged on one side of the second mounting plate and is arranged around the mounting hole; a circle of interval is left between the outer edge of the second mating platform and the edge of the second mounting plate; an expansion groove is provided between adjacent second mating platforms; a second ratchet ring is provided on the inner side of the second mating platform around the mounting hole; when the first bushing and the second bushing are assembled, the mounting column is connected to the mounting hole by threads, the inner wall of the second mating platform is fitted with the outer wall of the first mating platform, and the first ratchet ring and the second ratchet ring are meshed.

[0010] The outer side wall of the first matching platform is provided with an inclined surface; the inner side wall of the second matching platform is also provided with an inclined surface; when the first bushing and the second bushing are matched, a plurality of the second matching platforms surround the first matching platform, and the inclined surface on the first matching platform is interference fit with the inclined surface of the second matching platform.

[0011] It also includes a sealing ring; when the first bushing and the second bushing are assembled, the sealing ring surrounds and fits on the outer bottom of the first matching platform, and the top surface of the second matching platform fits on the sealing ring.

[0012] The tooth surface of the second ratchet ring is located at the bottom of the inner inclined surface of the second matching platform.

[0013] A cavity is also provided between the second ratchet ring and the second mounting plate; the second ratchet ring is slidably arranged in the cavity and is connected to the bottom of the cavity through an elastic member.

[0014] The bottom of the cavity is also provided with a plurality of through holes, which are connected to the side of the second mounting plate away from the second matching platform; a connecting rod is provided in the through hole, one end of which is connected to the second ratchet ring and the other end is hingedly provided with a pull ring.

[0015] A placement groove is also provided at the opening of the through hole on the side of the second mounting plate away from the second matching platform, and the pull ring is arranged in the placement groove.

[0016] The technical solution of the embodiment of the present invention has at least the following advantages and beneficial effects:

[0017] 1. The present invention provides an extrusion-type tightening self-locking bushing, which uses a first bushing with a first ratchet ring and a second bushing with a second ratchet ring, and is threadedly connected so that the two can rotate relative to each other during assembly, so that the first ratchet ring and the second ratchet ring are meshed. The mechanical characteristics of the bushing are used to limit the rotational freedom, and oil sealing is required at the sealing ring installation site before the two parts are installed to achieve a secure installation and prevent it from falling off during subsequent long-term use. The bushing installation has high precision, high stability, and operability, and the bushing installation accuracy and stability and reliability are improved on the basis of greatly reducing the error tolerance of labor and tools, thereby improving the service life and convenience of the tightening bushing.

[0018] 2. An extrusion-type tightening self-locking bushing of the present invention can realize automatic positioning after the two-part bushing is assembled, limit the freedom of bushing rotation, and realize stable and firm assembly of parts, so that the device has high fault tolerance during assembly and reduces the bushing installation error caused by human measurement factors; and an expansion groove is added to the clamping part, which is conducive to the stable clamping of the bushing mechanism and the workpiece, and the expansion clamping force is large. The bushing can be tightened and clamped after being placed, which can be suitable for the stable installation of bushings of continuous large quantities of workpieces, and has high stability. Before the installation of the two-part bushing, oil filling and sealing work is performed at the sealing ring installation position to improve the working accuracy and service life of the parts, so that it has strong stability, strong corrosion resistance, long service life, and sustainable work; it has a wide range of applications and can be used for bushing installation in multiple usage scenarios, and the parameters are adjustable;

[0019] 3. An extrusion-type fastening self-locking bushing of the present invention adopts a first bushing and a second bushing to be installed from both sides of the assembly through hole of the workpiece, and cooperates with the shoulders on the first bushing and the second bushing so that the shoulders on both sides can respectively fit the two end edges of the assembly through hole, so that the device can be stably assembled on the workpiece, avoiding the phenomenon that bushings without shoulders or single-head shoulders easily fall off and shake after frequent use, thereby ensuring the stability of the assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the split structure of the present invention;

[0021] Figure 2is an internal cross-sectional view of the present invention;

[0022] Figure 3 is an internal cross-sectional view of Embodiment 2 of the present invention;

[0023] Figure 4 Yes Figure 3 Enlarged view of point A in the middle.

[0024] In the figure, 101-first mounting plate, 102-assembly hole, 103-first assembly groove, 104-first matching platform, 105-mounting column, 106-first ratchet ring, 201-second mounting plate, 202-mounting hole, 203-second assembly groove, 204-second matching platform, 205-second ratchet ring, 206-through hole, 207-connecting rod, 208-spring, 209-pull ring, 3-sealing ring. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, but not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0026] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] Example 1

[0028] like Figure 1 and 2As shown, an extrusion-type fastening self-locking bushing comprises a first bushing, a second bushing and a sealing ring 3; the first bushing comprises a first mounting disk 101, a mounting column 105 and a first matching platform 104; the first mounting disk 101 is a circular disk, and a first assembly groove 103 is provided on its bottom side; the first assembly groove 103 is preferably a cross groove, which is used to rotate the first mounting disk 101; the mounting column 105 is arranged on the side of the first mounting disk 101 away from the first assembly groove 103, and the interior of the mounting column 105 is provided with an assembly hole 102 with two ends through, and the assembly hole 102 is used for sliding installation of other workpieces; the first matching platform 104 is arranged on the top side of the first mounting disk 101 and is arranged around the mounting column 105, and the outer side wall of the first matching platform 104 is provided with an inclined surface; the end of the first matching platform 104 away from the first mounting disk 101 is provided with a first ratchet ring 106 around the assembly hole 102; the outer side wall of the end of the mounting column 105 away from the first mounting disk 101 is provided with a thread;

[0029] Specifically, the outer wall of the first matching platform 104 is perpendicular to the top surface of the first mounting plate 101, and a gap is left between the outer wall of the first matching platform 104 and the side edge of the first mounting plate 101, which is called a sleeve shoulder; when the first bushing is slidably assembled in the assembly through hole on the workpiece, the sleeve shoulder of the first mounting plate 101 blocks the outside of the assembly through hole, limiting the first bushing from sliding out to the other side;

[0030] The second bushing includes a second mounting disk 201 and a plurality of second matching platforms 204; the second mounting disk 201 is a circular disk, and a second assembly groove 203 is provided on its bottom side, and a mounting hole 202 with two ends penetrating therethrough is also provided inside the disk, and the inner wall of the mounting hole 202 is provided with a thread; the second assembly groove 203 is preferably a cross groove, which is used to rotate the second mounting disk 201; the number of second matching platforms 204 is preferably 6; the second matching platforms 204 are arranged on the top side of the second mounting disk 201, and are equidistantly arranged around the mounting hole 202; an expansion groove is provided between adjacent second matching platforms 204; an inclined surface is provided on the inner side wall of the second matching platform 204; a second ratchet ring 205 is provided around the inner side wall of the second matching platform 204 and the mounting hole 202; the tooth surface of the second ratchet ring 205 faces the top surface of the second matching platform 204, and is flush with the bottom of the inclined surface of the inner side wall of the second matching platform 204;

[0031] Specifically, the outer wall of the second matching platform 204 is perpendicular to the top surface of the second mounting plate 201, and is used to directly fit with the inner wall of the assembly through hole on the workpiece; a circle of gap is left between the outer wall of the second matching platform 204 and the side edge of the second mounting plate 201, which is called a sleeve shoulder; when the second bushing is slidably assembled in the assembly through hole on the workpiece, the sleeve shoulder of the second mounting plate 201 blocks the outer side of the assembly through hole, limiting the second bushing from sliding out to the other side;

[0032] The sealing ring 3 is preferably an annular rubber ring. When the first bushing and the second bushing are assembled, the sealing ring 3 surrounds and fits the outer bottom of the first matching platform 104, and the top surface of the second matching platform 204 fits the sealing ring 3.

[0033] Specifically, when the first bushing and the second bushing are assembled, the first ratchet ring 106 and the second ratchet ring 205 are meshed, and the thread of the inner wall of the mounting hole 202 is meshed and connected with the thread on the mounting column 105; the inclined surface on the first matching platform 104 and the inclined surface of the second matching platform 204 are interference fit; when the mounting column 105 is screwed into the mounting hole 202, the first ratchet ring 106 and the second ratchet ring 205 rotate relative to each other, the inclined surface on the first matching platform 104 is fitted with the inclined surface of the second matching platform 204, and then the second matching platform When 204 continues to be screwed in, due to the interference fit, the second mating platform 204 is squeezed, and the outer wall of the second mating platform 204 is attached and squeezed to the inner wall of the assembly through hole of the workpiece, and at the same time, the expansion groove between adjacent second mating platforms 204 is opened, so that the second bushing is fixed to the workpiece, and at the same time, the first ratchet ring 106 and the second ratchet ring 205 are engaged with each other, so that their rotation is limited by the interaction with the threaded engagement, so as to achieve the purpose of stably fixing the first bushing and the second bushing in the hole of the workpiece and preventing them from falling off during subsequent long-term use.

[0034] Example 2

[0035] like Figure 3 As shown, a cavity is further provided between the second ratchet ring 205 and the second mounting plate 201; the second ratchet ring 205 is slidably arranged in the cavity and connected to the bottom of the cavity through an elastic member; the elastic member is preferably a spring 208; a plurality of through holes 206 are further provided at the bottom of the cavity and are connected to the side of the second mounting plate 201 away from the second matching platform 204; a connecting rod 207 is provided in the through hole 206, one end of which is connected to the second ratchet ring 205, and the other end is hingedly provided with a pull ring 209; the second mounting plate 201 is provided with a plurality of through holes 206, and ... A placement groove is also provided at the opening of the through hole 206 on the side of the mounting plate 201 away from the second matching platform 204, and the pull ring 209 is provided in the placement groove; so that the pull ring 209 will not interfere with the operation of other devices during the use of the device, and it is convenient to pull the connecting rod 207 during disassembly, thereby separating the first ratchet ring 106 and the second ratchet ring 205, and then allowing the mounting hole 202 and the mounting column 105 to rotate out in the opposite direction, so as to separate the first bushing and the second bushing and remove them from the workpiece. The other components of this embodiment 2 are the same as those of embodiment 1, and are not repeated here.

[0036] The working principle of this embodiment is:

[0037] The present invention provides an extrusion-type fastening self-locking bushing. First, the first bushing is slid into the assembly through hole (hereinafter referred to as the assembly through hole) on the workpiece to be assembled, so that the sleeve shoulder on the first mounting plate 101 fits with the surface of one side of the workpiece. Then, the sealing ring 3 is put in from the other end of the assembly through hole and is surrounded and fits with the outer bottom of the first matching platform 104. Then, the oiling step is performed at the installation position of the sealing ring 3, which can further ensure the sealing effect and make the assembly smoother. Then, the second bushing is put in from the other end of the assembly through hole, and the mounting column 105 is screwed into the mounting hole 202 along the thread, so that the inclined surface on the first matching platform 104 fits with the inclined surface of the second matching platform 204 and then continues to be screwed in, so that the first ratchet ring 106 and the second ratchet ring 205 rotate relative to each other, and then the rotation direction is restricted under the action of the ratchet. Then, the second When the mating platform 204 continues to be screwed in, due to the interference fit, the second mating platform 204 is squeezed, and the outer wall of the second mating platform 204 is attached to and squeezed with the inner wall of the assembly through hole, and at the same time, the expansion groove between adjacent second mating platforms 204 is expanded, so that the second bushing is relatively fixed to the workpiece, and at the same time, the first ratchet ring 106 and the second ratchet ring 205 are engaged with each other, so that their rotation is limited by the interaction with the threaded engagement, and at the same time, the shoulders on the first bushing and the second bushing are respectively attached to the surfaces at both ends of the assembly through hole, so that the device is fixed in the assembly hole 102 and its movement is restricted from both sides at the same time; when disassembly is required, the connecting rod 207 is pulled to separate the first ratchet ring 106 and the second ratchet ring 205, and then the mounting hole 202 and the mounting column 105 can be rotated out in the opposite direction, so that the first bushing and the second bushing are separated and removed from the workpiece.

[0038] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An extrusion-type fastening self-locking bushing, characterized in that: include: The first bushing comprises a first mounting plate, a mounting column and a first matching platform; the mounting column is arranged on one side of the first mounting plate, and the mounting column is provided with a mounting hole with two ends passing therethrough inside; the first matching platform is arranged on one side of the first mounting plate and is arranged around the mounting column; a circle of space is left between the outer edge of the first matching platform and the edge of the first mounting plate; a first ratchet ring is provided at one end of the first matching platform; a thread is provided on the outer wall of one end of the mounting column; The second bushing comprises a second mounting plate and a plurality of second matching platforms; the second mounting plate is provided with a mounting hole, and its inner wall is provided with a thread; the second matching platform is arranged on one side of the second mounting plate and is arranged around the mounting hole; a circle of interval is left between the outer edge of the second matching platform and the edge of the second mounting plate; an expansion groove is provided between adjacent second matching platforms; a second ratchet ring is provided on the inner side of the second matching platform around the mounting hole; when the first bushing and the second bushing are assembled, the mounting column is connected to the mounting hole by threads, the inner side wall of the second matching platform is fitted with the outer side wall of the first matching platform, and the first ratchet ring and the second ratchet ring are meshed; the outer side wall of the first matching platform is provided with an inclined surface; the inner side wall of the second matching platform is also provided with an inclined surface; when the first bushing and the second bushing are assembled, a plurality of the second matching platforms surround the first matching platform, and the inclined surface on the first matching platform is interference fit with the inclined surface of the second matching platform; the tooth surface of the second ratchet ring is located at the bottom of the inclined surface inside the second matching platform; Sealing ring; when the first bushing and the second bushing are assembled, the sealing ring surrounds and fits on the outer bottom of the first matching platform, and the top surface of the second matching platform fits on the sealing ring; A cavity is also provided between the second ratchet ring and the second mounting plate; the second ratchet ring is slidably disposed in the cavity and is connected to the bottom of the cavity via an elastic member; The bottom of the cavity is also provided with a plurality of through holes, which are connected to the side of the second mounting plate away from the second matching platform; a connecting rod is provided in the through hole, one end of which is connected to the second ratchet ring, and the other end is hingedly provided with a pull ring; A placement groove is also provided at the opening of the through hole on the side of the second mounting plate away from the second matching platform, and the pull ring is arranged in the placement groove.

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