Carrier plate nut structure with detachable cartridge receiver mounting edge

Abstract

The utility model relates to the technical field of aero-engines, and discloses a detachable supporting plate nut structure of a cartridge receiver mounting edge, which comprises a nut snap ring, an anti-rotation bump, a first bolt and a second bolt, and the rod part of the second bolt penetrates through a second mounting edge of a second connecting piece. The second bolt is used for being matched with the threaded assembly at the second installation hole so that the first installation edge and the second installation edge can be pressed and fixed between the nut clamping ring and the head of the second bolt. According to the utility model, the nut snap ring, the first bolt, the second bolt and the nut assembly are adopted to realize the combined connection of two mutually connected mounting edges of the cartridge receiver, a traditional supporting plate nut structural form is replaced, and the disassembly is convenient; when the nut is damaged and needs to be maintained and replaced, a conventional bolt and nut disassembling process can be adopted, destructive disassembling of the supporting plate nut is not needed, the maintenance period can be greatly shortened, the engine assembling and maintaining efficiency is improved, and the labor cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of aero-engine technology and discloses a detachable support plate nut structure for the casing mounting edge. Background Technology

[0002] A typical aero-engine unit mainly consists of five components: the intake casing, compressor, combustion chamber, turbine, and exhaust nozzle. Air is compressed and boosted by the compressor before entering the combustion chamber for combustion. The resulting high-temperature, high-pressure combustion gas expands in the turbine, converting into shaft power that drives the compressor. The gas is then expelled at high speed through the exhaust nozzle, generating the engine's thrust. Different components or parts require tight connections using bolts and nuts to ensure reliable mounting and sealing.

[0003] In actual design and assembly processes, due to space limitations or blind spots, some parts cannot be secured with nuts to tighten bolts during assembly. In such cases, a support plate nut needs to be pre-installed on the part's mounting edge before connecting it to the bolt. Currently, flared support plate nuts and riveted support plate nuts are commonly used in aero-engines. However, during assembly, the flared section of the flared support plate nut is prone to cracking during the flaring process. Furthermore, during aero-engine maintenance, if the threads of the support plate nut are damaged, the component must be disassembled and reassembled. Both flared and riveted support plate nuts are time-consuming and labor-intensive to reassemble. Utility Model Content

[0004] The purpose of this utility model is to provide a detachable tray nut structure for the mounting edge of the casing, which can replace the traditional tray nut structure and is easy to disassemble. When the nut is damaged and needs to be repaired or replaced, it can be done using the conventional bolt and nut disassembly process without the need for destructive disassembly of the tray nut. This can greatly shorten the maintenance cycle, improve the efficiency of engine assembly and maintenance, and reduce labor costs.

[0005] To achieve the above-mentioned technical effects, the technical solution adopted by this utility model is as follows:

[0006] A removable support plate nut structure for the mounting edge of a casing includes:

[0007] A nut retainer, wherein a first mounting hole and a second mounting hole are provided on the nut retainer, and threaded components are respectively provided at the first mounting hole and the second mounting hole;

[0008] An anti-rotation protrusion is fixed to the nut retainer on the side near the first mounting edge, and an anti-rotation groove that mates with the anti-rotation protrusion is provided on the first mounting edge.

[0009] The first bolt is used to engage with the threaded assembly at the first mounting hole to secure the nut retainer on the first mounting edge of the first connector;

[0010] The second bolt has its shank passing through the second mounting edge of the second connector. The second bolt is used to engage with the threaded assembly at the second mounting hole to press and fix the first mounting edge, the second mounting edge, and the head of the second bolt between the nut retainer and the second bolt.

[0011] Furthermore, the first bolt is a countersunk bolt, and the first mounting edge has a tapered hole on the side away from the nut retainer that mates with the head of the countersunk bolt; the threaded assembly at the first mounting hole is a first nut that mates with the countersunk bolt.

[0012] Furthermore, the threaded assembly at the second mounting hole is a second nut coaxially disposed with the second mounting hole, and the second nut is provided with an anti-rotation component that mates with the second mounting hole to limit and prevent rotation of the second nut.

[0013] Furthermore, the second nut is a cylindrical head nut, and the second mounting hole has an elliptical structure. The length of the long side of the ellipse of the second mounting hole is the same as the outer diameter of the second nut, and the length of the short side of the ellipse is less than the outer diameter of the second nut.

[0014] Furthermore, the second mounting hole on the nut retainer has a polygonal countersunk hole at a position away from the first mounting edge, and the head of the second nut has a polygonal structure that fits into the polygonal countersunk hole, forming an anti-rotation component.

[0015] Furthermore, the second nut and the nut retainer are in contact with each other on the end face away from the first mounting edge. The anti-rotation component is a first anti-rotation hole provided on one end face of the second nut, and the nut retainer is provided with an anti-rotation pin that cooperates with the first anti-rotation hole.

[0016] Furthermore, it also includes a spring sheet, which has a through hole through which the anti-rotation pin can pass; the anti-rotation pin has a locking wire hole, which is used to insert a locking wire to limit the spring sheet on the anti-rotation pin; and a compressed spring is provided between the spring sheet and the second nut.

[0017] Furthermore, the spring and the second nut are respectively provided with mounting grooves at the positions that contact the spring to accommodate the corresponding ends of the spring.

[0018] Furthermore, the nut retainer has one first mounting hole and multiple second mounting holes, which are symmetrically distributed on both sides of the first mounting hole. A convex ring structure is provided at the position corresponding to the first mounting hole, allowing the first bolt to pass through. A groove for the convex ring structure to engage is provided on the first mounting edge.

[0019] Furthermore, the second nut is a T-nut, the head of the second nut mates with the second mounting edge to form an axial stop surface, and the shank of the second nut passes through the second mounting hole to form an anti-rotation protrusion.

[0020] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model uses a nut retainer, a first bolt, a second bolt, and a nut assembly to combine and connect the two interconnected mounting edges of the casing, replacing the traditional tray nut structure, which facilitates disassembly; when the nut is damaged and needs to be repaired or replaced, the conventional bolt and nut disassembly process can be used, without the need for destructive disassembly of the tray nut, which can greatly shorten the maintenance cycle, improve the efficiency of engine assembly and maintenance, and reduce labor costs. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the connection structure between the first mounting edge and the second mounting edge in the embodiment;

[0022] Figure 2 This is a schematic diagram of the nut retainer structure in the embodiment;

[0023] Figure 3 This is a schematic diagram of the nut retainer structure with anti-rotation pin in the embodiment;

[0024] Figure 4 This is a schematic diagram of the second nut structure in the embodiment;

[0025] Figure 5 This is a schematic diagram showing the installation of the second nut, anti-rotation pin, and spring in the embodiment;

[0026] Among them, 1. Nut retainer; 101. First mounting hole; 102. Second mounting hole; 2. Anti-rotation protrusion; 3. First bolt; 4. Second bolt; 5. First nut; 6. Second nut; 7. First anti-rotation hole; 8. Anti-rotation pin; 801. Locking hole; 9. Spring; 10. Spring; 11. Protruding ring structure; 12. First mounting edge; 13. Second mounting edge. Detailed Implementation

[0027] The present invention will now be described in further detail with reference to the embodiments and accompanying drawings. However, this should not be construed as limiting the scope of the present invention to the following embodiments; all technologies implemented based on the content of the present invention fall within the scope of the present invention.

[0028] Example

[0029] See Figures 1-5 A removable mounting plate nut structure for a casing, comprising:

[0030] Nut retainer 1, wherein a first mounting hole 101 and a second mounting hole 102 are provided on the nut retainer 1, and threaded components are respectively provided at the first mounting hole 101 and the second mounting hole 102;

[0031] Anti-rotation protrusion 2, the anti-rotation protrusion 2 is fixed on the side of the nut retainer 1 near the first mounting edge 12, and the first mounting edge 12 is provided with an anti-rotation groove that cooperates with the anti-rotation protrusion 2;

[0032] The first bolt 3 is used to engage with the threaded assembly at the first mounting hole 101 to fix the nut retainer 1 on the first mounting edge 12 of the first connector;

[0033] The second bolt 4 has its shank passing through the second mounting edge 13 of the second connector. The second bolt 4 is used to engage with the threaded assembly at the second mounting hole 102 to press and fix the first mounting edge 12 and the second mounting edge 13 between the nut retainer 1 and the head of the second bolt 4.

[0034] In this embodiment, a nut clasp 1, a first bolt 3, a second bolt 4, and a nut assembly are used to connect the two interconnected mounting edges (first mounting edge 12 and second mounting edge 13) of the casing, replacing the traditional tray nut structure, which facilitates disassembly. When the nut is damaged and needs to be repaired or replaced, the conventional bolt and nut disassembly process can be used, without the need for destructive disassembly of the tray nut. This can greatly shorten the maintenance cycle, improve engine assembly and maintenance efficiency, and reduce labor costs.

[0035] In this embodiment, the specific installation process for the two cooperating casing mounting edges is as follows:

[0036] S1. Insert the anti-rotation protrusion 2 of the nut retainer 1 into the anti-rotation groove of the first mounting edge 12 to achieve the installation and positioning of the nut retainer 1 while ensuring that the nut retainer 1 has the anti-rotation function.

[0037] In this embodiment, the nut retainer 1 has a first mounting hole 101, and the number of second mounting holes 102 can be arranged in groups of two or more. The second mounting holes 102 are symmetrically distributed on both sides of the first mounting hole 101. To prevent the nut retainer 1 from being suspended in the middle and thus lacking strength, this embodiment provides a convex ring structure 11 at the position corresponding to the first mounting hole 101, through which the first bolt 3 can pass. The first mounting edge 12 is provided with a groove for the convex ring structure 11 to fit, which can increase the structural strength of the nut retainer 1.

[0038] As illustrated in this embodiment, a structure consisting of two second mounting holes 102 is used as a group. The corresponding first mounting edge 12 has a total of three holes: one countersunk hole and two bolt through holes. The countersunk hole is used to mate with the first bolt 3, and the two bolt through holes are respectively used to mate with the corresponding second bolt 4.

[0039] In this embodiment, anti-rotation grooves are provided at the positions of the two bolt through holes facing the first mounting edge 12, and the anti-rotation protrusion 2 extends into the anti-rotation groove to realize the anti-rotation function of the nut retainer 1.

[0040] S2. The first bolt 3 passes through the first mounting edge 12 and the first mounting hole 101, and cooperates with the nut assembly located at the first mounting hole 101 to achieve relative fixation between the nut retainer 1 and the first mounting edge 12.

[0041] In this embodiment, the first bolt 3 is a countersunk bolt, and the threaded assembly at the first mounting hole 101 is a first nut 5 that mates with the countersunk bolt. The countersunk portion of the countersunk hole can be any structure, such as a conical surface or a flat groove, and its shape can be any shape, such as round, square, or polygonal, used to house the head of the countersunk bolt. Figure 1 As shown, the head of the countersunk bolt must be consistent with the countersunk structure of the countersunk hole to ensure a proper fit. For example, in this embodiment, the conical surface of the countersunk bolt and the conical surface of the countersunk hole must fit together to ensure that the end face of the countersunk bolt does not protrude from the corresponding mounting surface of the first mounting edge 12 after assembly.

[0042] S3. Pass the shank of the second bolt 4 through the second mounting edge 13 of the second connector, so that the second bolt 4 engages with the threaded assembly at the second mounting hole 102, thereby pressing and fixing the first mounting edge 12 and the second mounting edge 13 between the nut retainer 1 and the head of the second bolt 4.

[0043] In this embodiment, the bolt holes of the second mounting edge 13 are aligned with the bolt holes of the first mounting edge 12, the second bolt 4 is passed through the bolt holes of the second mounting edge 13 and the first mounting edge 12, and the other end is connected to the second nut 6 assembly. The assembly is then tightened according to the bolt tightening torque requirements.

[0044] In this embodiment, the threaded assembly at the second mounting hole 102 is a second nut 6 coaxially arranged with the second mounting hole 102. The second nut 6 is provided with an anti-rotation component that mates with the second mounting hole 102 to limit and prevent rotation of the second nut 6. When the nut is damaged or reaches the end of its service life and needs to be replaced, the bolt and nut can be quickly disassembled and replaced, replacing the destructive disassembly and assembly process of traditional pallet nuts, thus improving assembly and engine maintenance efficiency.

[0045] In this embodiment, the second nut 6 is a cylindrical head nut, and the second mounting hole 102 is an elliptical structure. The length of the long side of the ellipse of the second mounting hole 102 is the same as the outer diameter of the second nut 6, and the length of the short side of the ellipse is less than the outer diameter of the second nut 6. By setting the second mounting hole 102 to an elliptical shape, with the length of the long side of the ellipse being the same as the outer diameter of the second nut 6 and the length of the short side of the ellipse being shorter than the outer diameter of the second nut 6, before assembling the second nut 6 with the nut retainer 1, the nut retainer 1 is heated to expand the diameter of the second mounting hole 102. After the second nut 6 is inserted into the second mounting hole 102, and after the nut retainer 1 cools down, the second nut 6 can be pressed against the short side of the second mounting hole 102. The second nut 6 can deform in the short side direction, thus giving the second nut 6 a threaded self-locking function. This irregular structure also allows the second nut 6 to be circumferentially fixed and unable to rotate circumferentially. This structural fit allows the nut to simultaneously have a threaded self-locking function and a circumferential anti-rotation function.

[0046] In addition to the aforementioned anti-rotation structure, the second mounting hole 102 on the nut retainer 1 can also be provided with a regular polygonal countersunk hole at a position away from the first mounting edge 12. The head of the second nut 6 is a polygonal structure that fits into the polygonal countersunk hole, forming an anti-rotation component. Any shape with anti-rotation function, such as a dodecagonal head, hexagonal head, quadrilateral, or cross shape, can be used.

[0047] In addition to the aforementioned anti-rotation structure, the second nut 6 and the nut retainer 1 are in contact on the end face opposite to the first mounting edge 12. The anti-rotation component is a first anti-rotation hole 7 provided on one end face of the second nut 6, and the nut retainer 1 is provided with an anti-rotation pin 8 that mates with the first anti-rotation hole 7. When connecting and fixing the first mounting edge 12 and the second mounting edge 13, the second nut 6 is first installed on the nut retainer 1. The anti-rotation pin 8 of the nut retainer 1 passes through the first anti-rotation hole 7 of the second nut 6, making it impossible for the second nut 6 to rotate circumferentially.

[0048] In some embodiments, to ensure the second nut 6 fits snugly with the nut retainer 1, a spring plate 9 is fitted onto the second nut 6. The spring plate 9 has a through hole through which the anti-rotation pin 8 passes. The anti-rotation pin 8 has a locking thread hole 801 for inserting a locking thread to limit the spring plate 9 onto the anti-rotation pin 8. A compressed spring 10 is provided between the spring plate 9 and the second nut 6. By engaging the head of the spring plate 9 with the head of the second nut 6, the spring 10 is fixed between the spring plate 9 and the head of the second nut 6, ensuring that the spring 10 will not fall out and remains compressed. Then, the nut retainer 1 is assembled with the first mounting edge 12. When the second nut 6 needs to be replaced later, the locking thread is cut, the spring plate 9 is removed, and the second nut 6 can be replaced without disassembling the nut retainer 1, reducing the number of times the countersunk bolt is disassembled and reducing wear on the countersunk bolt and nut.

[0049] In this embodiment, the spring 9 and the second nut 6 are respectively provided with mounting grooves at the positions in contact with the spring 10 to accommodate the corresponding ends of the spring 10, which ensures that the spring 10 will not fall off accidentally when used for a long time or subjected to vibration, thereby maintaining the continuous compression state of the spring 10 and helping to maintain the tight fit between the second nut 6 and the nut retainer 1.

[0050] In this embodiment, the second nut 6 is a T-nut. The head of the second nut 6 and the second mounting edge 13 cooperate to form an axial stop surface. The shank of the second nut 6 passes through the second mounting hole 102 to form an anti-rotation protrusion 2. The anti-rotation protrusion 2 is formed by the structure of the second nut 6 itself, so there is no need to process the anti-rotation protrusion 2 separately on the nut retainer 1. This can effectively simplify the structure of the nut retainer 1, reduce processing costs, and improve assembly efficiency.

[0051] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A cassette mounting edge detachable pallet nut structure characterized by, The utility model relates to a nut snap ring (1) is provided with first installation hole (101) and second installation hole (102) on the nut snap ring (1), and the first installation hole (101) and second installation hole (102) are provided with threaded assembly respectively at first installation edge (12) one side of the nut snap ring (1) close to the first installation edge (12) fixed with anti -rotation boss (2), and the first installation edge (12) is provided with anti -rotation slot that cooperates with anti -rotation boss (2) on the first installation edge (12), first bolt (3) is used for cooperating with threaded assembly at first installation hole (101) to fix the nut snap ring (1) on the first installation edge (12) of first connecting piece, the rod portion of second bolt (4) passes through the second installation edge (13) of second connecting piece, and second bolt (4) is used for cooperating with threaded assembly at second installation hole (102) to be fixed tightly in the head between first installation edge (12), second installation edge (13) and second bolt (4) of nut snap ring (1). The first bolt (3) is countersunk bolt, the first installation edge (12) is provided with tapered hole that cooperates with the head of the countersunk bolt on the side away from the nut snap ring (1), and the threaded assembly at the first installation hole (101) is first nut (5) that cooperates with the countersunk bolt. The threaded assembly at the second installation hole (102) is second nut (6) that is provided coaxially with the second installation hole (102), the second nut (6) is provided with anti -rotation assembly that cooperates with the second installation hole (102) to limit the anti -rotation of second nut (6). The second nut (6) is cylindrical head nut, the second installation hole (102) is oval structure, the length of the long side of the oval of the second installation hole (102) is consistent with the outer diameter of the second nut (6), and the length of the short side of the oval is less than the outer diameter of the second nut (6). The second installation hole (102) on the nut snap ring (1) is provided with polygonal countersunk hole at the position away from the first installation edge (12), the head of the second nut (6) is polygonal structure that fits with the polygonal countersunk hole, and anti -rotation assembly is formed.

2. The chasis mounting edge removable pallet nut structure of claim 1 wherein, The second nut (6) is in contact with the end face on the nut snap ring (1) away from the first installation edge (12), the anti -rotation assembly is first anti -rotation hole (7) that is set on one end face of the second nut (6), and the nut snap ring (1) is provided with anti -rotation pin (8) that cooperates with the first anti -rotation hole (7).

3. The chasis mounting edge removable pallet nut structure of claim 1 wherein, It further includes a spring piece (9), the spring piece (9) is provided with a perforation for the anti -rotation pin (8) to pass through, the anti -rotation pin (8) is provided with a lock wire hole (801), the lock wire hole (801) is used for inserting a lock wire to limit the spring piece (9) on the anti -rotation pin (8), and the spring piece (9) and the second nut (6) are provided with a compressed spring (10) between them.

4. The chasis mounting edge removable pallet nut structure of claim 3 wherein, The spring piece (9) and the second nut (6) are provided with mounting grooves for accommodating corresponding end heads of the spring (10) at positions in contact with the spring (10).

5. The chasis mounting edge removable pallet nut structure of claim 3 wherein, ​ 6. The chasis mounting edge removable pallet nut structure of claim 3 wherein, ​ 7. The chasis mounting edge removable pallet nut structure of claim 6 wherein, ​ 8. The chasis mounting edge removable pallet nut structure of claim 7 wherein, ​ 9. The châssis mounting edge removable pallet nut structure according to claim 1, characterized in that, The nut snap ring (1) has one first mounting hole (101) and multiple second mounting holes (102), the multiple second mounting holes (102) are symmetrically distributed on both sides of the first mounting hole (101), the first mounting hole (101) is provided with a convex ring structure (11) for the first bolt (3) to pass through, and the first mounting edge (12) is provided with a groove matched with the convex ring structure (11).

10. The châssis mounting edge removable pallet nut structure according to claim 3, characterized in that, The second nut (6) is a T-shaped nut, the head of the second nut (6) is matched with the second mounting edge (13) to form an axial stop surface, and the rod of the second nut (6) passes through the second mounting hole (102) to form the anti-rotation convex block (2).

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