Shoulder-free bush rapid installation device of aircraft supporting frame

Abstract

The utility model relates to the technical field of aviation shoulder-free lining installation, and discloses a shoulder-free lining rapid installation device of an airplane supporting frame, which comprises a base, a guide, a magnetic suction gasket and a pressure head, the base is provided with a supporting surface, and the supporting surface is used for supporting the shoulder-free lining pressed into a supporting frame part and avoiding the guide in the pressing-in process; one end of the guide penetrates through the lining bottom hole of the supporting frame and the shoulder-free lining, the other end of the guide is inserted into the pressing head, and the guide and the pressing head are kept in an attached state through the magnetic force of the magnetic gasket; the bushing is installed in a press machine extrusion mode, operation is simple and rapid, and meanwhile the risk that the bushing installation is affected by thread damage is avoided; by means of the magnetic force of the magnetic suction gasket, the operation that the replaceable guide is rapidly attached to the pressing head in the shoulder-free bush installation process is supported, and meanwhile the operation that the replaceable guide and the pressing head are rapidly detached after the shoulder-free bush is installed is also facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of aviation shoulderless bushing installation, in particular to a shoulderless bushing quick installation device for an aircraft support frame. Background Art

[0002] There are many supporting frame parts in aircraft structures, which are used to connect structures and mechanisms. In order to meet functional requirements and increase the service life of components, a shoulderless bushing is usually installed inside the bottom hole of the support frame during design. Usually, there are dimensional requirements for the end face of the shoulderless bushing and the end face of the support frame after installation in the manufacturing drawings or specifications. However, the conventional spinning installation method with threaded rods and nuts is not fast in terms of the speed of bushing installation and disassembly of the device after installation. Therefore, how to design a tool that ensures the step difference between the end face of the bushing and the end face of the part after the shoulderless bushing is installed, and the bushing can be installed quickly and the device can be quickly disassembled after installation has become a technical problem that needs to be solved urgently. Utility Model Content

[0003] In response to the shortcomings of the existing technology, the utility model provides a shoulderless bushing quick installation device for an aircraft support frame, which has the advantages of ensuring the step difference between the bushing end face and the part end face after the shoulderless bushing is installed, and the bushing is installed quickly and the device can be quickly disassembled after installation. It solves the problem that the conventional spinning installation method with a combination of threaded rods and nuts is not fast in both the speed of bushing installation and the speed of disassembly of the device after installation.

[0004] In order to achieve the above-mentioned purpose of ensuring the step difference between the end face of the bushing and the end face of the part after the shoulderless bushing is installed, and the bushing is installed quickly and the device can be quickly disassembled after installation, the utility model provides the following technical solutions: A shoulderless bushing quick installation device for an aircraft support frame, comprising a base, a guide, a magnetic washer, and a pressure head, wherein the base is provided with a support surface for supporting the shoulderless bushing when it is pressed into the support frame part and for avoiding the guide during the pressing process; one end of the guide passes through the bottom hole of the support frame bushing and the shoulderless bushing, and the other end is inserted into the pressure head, and the magnetic force of the magnetic washer is used to keep the guide and the pressure head in close contact.

[0005] Preferably, the support frame is a V-shaped structure, and a support surface is provided on the base according to the structure of the support frame, for supporting the support frame when pressing the shoulderless bushing.

[0006] Preferably, the support surface is provided with an avoidance hole for avoiding interference between the guide and the base.

[0007] Preferably, the guide is in the shape of a three-layer step, the front end part of which is a cylinder with a chamfer, the chamfer is used for quick positioning and alignment, the front end cylinder plays a guiding role in the bushing installation process, and the front end cylinder and the bottom hole of the support frame bushing are clearance-fitted; the middle cylindrical part passes through the shoulderless bushing, which is used to limit the shoulderless bushing, and the middle cylinder and the shoulderless bushing are clearance-fitted; the rear end part is a cylinder with a chamfer, the chamfer is used for quick positioning and alignment, and the rear end cylindrical part plays a guiding role in the process of positioning and sticking the guide and the pressure head.

[0008] Preferably, the magnetic washer is located between the guide and the pressure head. After the shoulderless bushing is installed into the guide, the magnetic force of the magnetic washer is used to keep the guide and the pressure head in close contact, thereby preventing the shoulderless bushing from falling off during the liquid nitrogen cooling process of the bushing or the installation process of the bushing.

[0009] Preferably, the magnetic force of the magnetic washer is used to support the rapid adhesion of the guide and the pressure head and the rapid disassembly of the guide and the pressure head after the shoulderless bushing is installed.

[0010] Preferably, the pressure head is a three-layer concave stepped shape, the inner diameter of the concave cylindrical part at the front end is larger than the outer diameter of the shoulderless bushing, and the depth is consistent with the height of the shoulderless bushing protruding support frame, which is used to ensure the protrusion amount after the shoulderless bushing is installed; the middle concave cylindrical part limits the guide; the concave part at the rear end is used for rapid air discharge and facilitating the observation of the installation status of the shoulderless bushing installation device.

[0011] Compared with the prior art, the present invention provides a shoulder-free bushing quick installation device for an aircraft support frame, which has the following beneficial effects:

[0012] 1. This quick-install device for shoulderless bushings on aircraft support frames is suitable for installing both shoulderless and shouldered bushings. By slightly adjusting the design of the pressure head structure, by changing the concave design at the front end of the pressure head to a convex design, the control of the shoulderless bushing above the support frame surface can be achieved, while the control of the shoulderless bushing below the support frame surface can be achieved.

[0013] 2. The shoulderless bushing quick installation device for the aircraft support frame has a simple structure and low manufacturing cost. All parts of the device can be manufactured using ordinary machining and CNC equipment.

[0014] 3. The aircraft support frame's shoulderless bushing quick installation device uses a press extrusion method to install the bushing. Compared with the method of tightening and inserting with threaded rods and nuts, the operation is simpler and faster, and the risk of thread damage affecting bushing installation is avoided.

[0015] 4. The shoulderless bushing quick installation device of the aircraft support frame utilizes the magnetic force of the magnetic washer to not only support the quick adhesion of the replaceable guide and the pressure head during the installation of the shoulderless bushing, but also facilitates the quick disassembly of the replaceable guide and the pressure head after the bushing is installed. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the overall structure of the shoulderless bushing of the utility model;

[0017] Figure 2 This is an exploded view of the shoulderless bushing of the utility model;

[0018] Figure 3 This is a cross-sectional view of the structure of the utility model after the shoulder-less bushing is installed;

[0019] Figure 4 This is a schematic diagram of the structure of the shoulderless bushing provided by the utility model;

[0020] Figure 5 It is a structural diagram of the base of the utility model.

[0021] In the figure: 1. Support frame; 2. Shoulderless bushing; 3. Base; 31. Support surface; 32. Avoidance hole; 4. Guide; 5. Magnetic washer; 6. Press head; 7. Press. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] like Figure 1-5As shown, a quick installation device for a shoulderless sleeve 2 on an aircraft support frame 1 includes a base 3, a guide 4, a magnetic washer 5, and a press head 6. The base 3 is provided with three support surfaces 31 for supporting the shoulderless sleeve 2. These surfaces support the shoulderless sleeve 2 when pressed into the support frame 1 and prevent the guide 4 from moving during the press-in process. One end of the guide 4 passes through the bottom hole of the support frame 1 sleeve and the shoulderless sleeve 2, and the other end is inserted into the press head 6. The magnetic force of the magnetic washer 5 maintains the guide 4 and press head 6 in close contact. During installation, the support frame 1 is first placed on the support surface 31 of the base 3 to ensure accurate positioning. Then, the guide 4 is passed through the bottom hole of the support frame 1 sleeve and the shoulderless sleeve 2, and the other end is inserted into the press head 6. At this point, the magnetic force of the magnetic washer 5 ensures a tight fit between the guide 4 and the press head 6. Next, by operating the press head 6 to apply pressure, the shoulderless sleeve 2 is gradually pressed into the predetermined position on the support frame 1 under the guidance of the guide 4. The entire installation process is fast, accurate and causes little damage to parts.

[0024] like Figure 5 As shown, in one embodiment of the present invention, the support frame 1 is a V-shaped structure, and three small contoured support surfaces 31 are correspondingly provided on the base 3 according to the V-shaped support frame 1, which are used to support the support frame 1 when pressing the shoulderless bushing 2; each support surface 31 is provided with an avoidance hole 32, which is used to avoid interference between the guide 4 and the base 3; the design of the base 3 of the shoulderless bushing 2 quick installation device of the aircraft support frame 1 fully considers the characteristics and installation requirements of the V-shaped support frame 1, and through the provision of the small contoured support surface 31 and the avoidance hole 32, stable support for the support frame 1 and smooth avoidance of the guide 4 are achieved, thereby improving the installation efficiency and installation quality.

[0025] like Figure 2 As shown, in one embodiment of the present invention, the guide 4 is three-stepped, and its front end part is a cylinder with chamfers, and the chamfers are used for quick positioning and alignment, and the front end cylinder plays a guiding role in the installation process of the bushing, and the front end cylinder and the bottom hole of the bushing of the support frame 1 adopt a clearance fit; the middle cylindrical part passes through the shoulderless bushing 2, which is used to limit the shoulderless bushing 2, and the middle cylinder and the shoulderless bushing 2 adopt a clearance fit; the rear end part is also a cylinder with chamfers, and the chamfers are used for quick positioning and alignment, and the rear end cylindrical part plays a guiding role in the positioning and tight fit of the guide 4 and the pressure head 6; through the three-step design and chamfering, clearance fit and other details, the entire installation process becomes smoother and more efficient, reducing installation time and labor costs; the precise design of the guide 4 and the close fit of each part ensure that the shoulderless bushing 2 can be accurately and quickly installed to the predetermined position of the support frame 1, thereby improving installation accuracy and product quality; clearance fit and reasonable structural design reduce friction and damage to various parts during installation, and extend the service life of parts.

[0026] like Figure 2 and Figure 3 As shown, in one embodiment of the present invention, the magnetic washer 5 is located between the guide 4 and the pressure head 6. After the shoulderless bushing 2 is installed in the guide 4, the magnetic force of the magnetic washer 5 is used to keep the guide 4 and the pressure head 6 in a close contact state, so as to prevent the shoulderless bushing 2 from falling off during the liquid nitrogen cooling process of the bushing or the installation process of the bushing. The magnetic force of the magnetic washer 5 is used to support the operation of quickly pressing the guide 4 and the pressure head 6 together and the operation of quickly disassembling the guide 4 and the pressure head 6 after the shoulderless bushing 2 is installed. The magnetic washer 5 is located between the guide 4 and the pressure head 6. Through its strong magnetic force, the guide 4 and the pressure head 6 can be tightly fitted during the installation process, ensuring that the shoulderless bushing 2 is smoothly pressed into the support frame 1 under the guidance of the guide 4. This close contact state not only improves the stability of the installation, but also reduces the installation error caused by looseness or offset. During the installation of the shoulderless bushing 2, especially in special processing stages such as liquid nitrogen cooling of the bushing, the shoulderless bushing 2 may fall off due to temperature changes or improper operation. The magnetic force of the magnetic washer 5 effectively prevents this from happening, ensuring that the shoulderless bushing 2 remains on the guide 4 until fully installed. The magnetic force of the magnetic washer 5 not only allows the guide 4 and the indenter 6 to quickly adhere to each other, but also facilitates quick removal of the shoulderless bushing 2 after installation. This design greatly improves work efficiency, reduces operation time, and makes the entire installation process more flexible and convenient.

[0027] like Figure 2 As shown, in one embodiment of the present invention, the pressure head 6 is a three-layer concave stepped shape, the inner diameter of the concave cylindrical part at the front end is larger than the outer diameter of the shoulderless bushing 2, and the depth is consistent with the height of the shoulderless bushing 2 protruding from the support frame 1, which is used to ensure the protrusion of the shoulderless bushing 2 after installation; the middle concave cylindrical part allows the guide 4 to be limited; the rear end concave part is used for rapid air discharge and facilitating the observation of the installation status of the shoulderless bushing 2 installation device; the three-layer concave stepped design enables the pressure head 6 to accurately match the size requirements of the shoulderless bushing 2 and the support frame 1, thereby improving the accuracy of installation; the rapid air discharge design and the rear end concave part that is easy to observe make the entire installation process smoother and more convenient; by accurately matching the protrusion of the shoulderless bushing 2 and providing a stable guide 4 limiting effect, the pressure head 6 design ensures that the installation quality of the shoulderless bushing 2 meets the design requirements; the reasonable structural design reduces potential risks during the installation process, such as friction, excessive resistance or installation offset, thereby improving the safety of operation.

[0028] Working principle: Position the support frame 1 and base 3 to the appropriate position of the press 7; press the shoulderless bushing 2, guide 4, magnetic washer 5, and press head 6 Figure 2Install them in sequence and put them into the liquid nitrogen tank for cooling; take out the cooled bushing, guide 4 and other assemblies from the liquid nitrogen tank, and quickly insert the guide 4 into the bottom hole of the bushing of the support frame 1, and then quickly lower the press 7 to press the bushing into the bottom hole of the bushing of the support frame 1; lift and lock the press 7, and then remove the entire device and the support frame 1 assembly from the press 7; remove the pressure head 6 from above the support frame 1 assembly, and finally push the guide 4 and the magnetic washer 5 out from under the support frame 1 assembly.

[0029] In summary, the quick installation device for the shoulderless bushing 2 of the aircraft support frame 1 is applicable to the installation of both shoulderless bushings 2 and shouldered bushings. At the same time, based on the structural design of the pressure head 6, a slight adjustment is made to change the concave design of the front end of the pressure head 6 to a convex design to achieve the control of the shoulderless bushing 2 above the support frame 1 surface and the control of the shoulderless bushing 2 below the support frame 1 surface; the structure is simple, the manufacturing cost is low, and ordinary machining CNC equipment can be used to complete the manufacturing of all parts of the device; the bushing is installed by extrusion using a press 7, which is simpler and faster to operate than the method of tightening with a threaded rod and a nut, and avoids the risk of thread damage affecting the installation of the bushing; by utilizing the magnetic force of the magnetic washer 5, it not only supports the operation of quickly pressing the replaceable guide 4 and the pressure head 6 during the installation of the shoulderless bushing 2, but also facilitates the quick disassembly of the replaceable guide 4 and the pressure head 6 after the bushing is installed.

[0030] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0031] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A quick installation device for a shoulderless bushing of an aircraft support frame, characterized in that: The invention comprises a base (3), a guide (4), a magnetic washer (5), and a pressure head (6); the base (3) is provided with a support surface (31) for supporting the shoulderless bushing (2) when it is pressed into the support frame (1) and for avoiding the guide (4) during the pressing process; one end of the guide (4) passes through the bottom hole of the bushing of the support frame (1) and the shoulderless bushing (2), and the other end is inserted into the pressure head (6), and the magnetic force of the magnetic washer (5) keeps the guide (4) and the pressure head (6) in close contact.

2. The quick installation device for a shoulderless bushing of an aircraft support frame according to claim 1, characterized in that: The support frame (1) is a V-shaped structure, and a support surface (31) is provided on the base (3) according to the structure of the support frame (1), for supporting the support frame (1) when pressing the shoulderless bushing (2).

3. The quick installation device for a shoulderless bushing of an aircraft support frame according to claim 2, characterized in that: The support surface (31) is provided with an avoidance hole (32) for avoiding interference between the guide (4) and the base (3).

4. The shoulderless bushing quick installation device for an aircraft support frame according to claim 1, characterized in that: The guide (4) is in a three-layer stepped shape, and its front end portion is a cylinder with a chamfer, and the chamfer is used for rapid positioning and alignment. The front end cylinder plays a guiding role in the bushing installation process, and the front end cylinder and the bushing bottom hole of the support frame (1) adopt a clearance fit; the middle cylindrical portion passes through the shoulderless bushing (2) and is used to limit the shoulderless bushing (2), and the middle cylinder and the shoulderless bushing (2) adopt a clearance fit; the rear end portion is a cylinder with a chamfer, and the chamfer is used for rapid positioning and alignment. The rear end cylindrical portion plays a guiding role in the positioning and tight fit process of the guide (4) and the pressure head (6).

5. The shoulderless bushing quick installation device for an aircraft support frame according to claim 1, characterized in that: The magnetic washer (5) is located between the guide (4) and the pressure head (6). After the shoulderless bushing (2) is installed in the guide, the magnetic force of the magnetic washer (5) is used to keep the guide (4) and the pressure head (6) in a close contact state, thereby preventing the shoulderless bushing (2) from falling off during the liquid nitrogen cooling process of the bushing or the installation process of the bushing.

6. The shoulderless bushing quick installation device for an aircraft support frame according to claim 5, characterized in that: The magnetic force of the magnetic washer (5) is used to support the rapid adhesion of the guide (4) and the pressure head (6) and the rapid disassembly of the guide (4) and the pressure head (6) after the shoulderless bushing (2) is installed.

7. The shoulderless bushing quick installation device for an aircraft support frame according to claim 1, characterized in that: The pressure head (6) is in the shape of a three-layer concave step, the inner diameter of the front concave cylindrical portion is larger than the outer diameter of the shoulderless bushing (2), and the depth is consistent with the height of the shoulderless bushing (2) protruding from the support frame (1), which is used to ensure the protrusion of the shoulderless bushing (2) after installation; the middle concave cylindrical portion limits the guide (4); the rear concave portion is used for rapid exhaust of air and for facilitating observation of the installation status of the shoulderless bushing (2) installation device.

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