A reusable screw locking structure

Abstract

The application discloses a reusable screw locking structure, which comprises a locking assembly, a screw, an insertion end, and the locking assembly is detachably connected with the screw and the insertion end. When the locking assembly is connected with the screw, the locking assembly and the screw are circumferentially locked. When the locking assembly is connected with the insertion end, the locking assembly and the insertion end are circumferentially locked. When the screw is inserted into the insertion end, the locking assembly is connected with the screw and the insertion end simultaneously. The locking assembly is detachably connected with the screw and the air inlet cap cover. The circumferential relative positions of the screw and the air inlet cap cover are ensured by circumferentially locking the screw and the air inlet cap respectively. When replacement or reinstallation is needed, the screw locking structure can be repeatedly used without being discarded.

Description

Technical Field

[0001] This invention belongs to the field of turbine engine fastening, and specifically relates to a reusable screw locking structure. Background Technology

[0002] The intake cap is an indispensable structure at the intake end of a gas turbine engine, especially a turbofan engine, and its fastening reliability directly determines the reliability and safety of the entire engine. The top locking screw connection of the intake cap 3 is widely used in the fastening of the intake cap 3 in small and medium-sized turbofan engines due to its simple structure and few parts. However, because of the small number of locking parts and the complex working conditions of the front intake, higher requirements are placed on the reliability of the connecting parts.

[0003] Currently, in existing technologies, as shown in the appendix Figure 1 The locking of the screw 2 at the front end of the air intake cap 3 generally adopts a disposable locking plate to ensure the relative position of the screw 2 and the air intake cap. The screw 2 and the air intake cap 3 are fixed in the circumferential direction by the permanent plastic deformation of the locking plate, which ensures the reliability of the air intake cap 3 and other rotor components in the pressing state.

[0004] In existing technologies, locking plates are simple and easy to install and remove, but they cannot be repeatedly disassembled and reused, and cannot be repeatedly bent during assembly. This type of bent locking plate typically includes a fixing area 51 and a bending area 52. The fixing area 51 is inserted into the fixing groove of the air intake cap 3. After the locking screw 2 is tightened, the bending area 52 of the locking plate is hammered into the peripheral plane of the screw head 2 to achieve locking. Alternatively, some structures have the fixing groove located at the screw head 2. After the locking plate and screw 2 are screwed together and locked, the bending area is hammered into the air intake cap 3 to ensure locking.

[0005] However, regardless of the fixing method used, this locking plate is a replacement part and is a disposable consumable that cannot be reused. The above-mentioned problems are the technical issues that this application urgently needs to solve. Summary of the Invention

[0006] To address the above problems, the present invention provides a reusable screw locking structure.

[0007] The technical solution of the present invention to solve the above-mentioned technical problems is as follows: a reusable screw locking structure, including a locking component; and

[0008] A screw, a locking assembly, and a detachable connection between the screw and the locking assembly, wherein the locking assembly and the screw are circumferentially locked when connected; and

[0009] The insertion end has a screw that can be inserted into it. The locking component is detachably connected to the insertion end. When the locking component is connected to the insertion end, the locking component and the insertion end are circumferentially locked.

[0010] When the screw is inserted into the insertion end, the locking component connects to both the screw and the insertion end simultaneously.

[0011] In one alternative embodiment, the locking assembly includes a locking member located between the nut of the screw and the insertion end, the locking member being simultaneously pluggable to both the screw and the insertion end.

[0012] In an alternative embodiment, the locking component further includes a positioning piece on which the locking element is disposed.

[0013] In an alternative embodiment, an axial locking structure is also included for axially locking the locking component.

[0014] In one alternative embodiment, the axial locking structure includes an elastic retaining ring located between the locating piece and the nut, and the elastic retaining ring is sleeved on the outside of the locking member.

[0015] In an alternative embodiment, a radial locking structure is also included for radially locking the locking component.

[0016] In one alternative embodiment, the radial locking structure includes a boss that protrudes axially from the insertion end, the boss being arranged circumferentially along the insertion end, and a positioning piece being sleeved on the outside of the boss.

[0017] In one optional embodiment, a first locking groove is provided on the boss, and the locking member protrudes radially from the inner side of the positioning piece, and the first locking groove is plugged into and pulled into the locking member.

[0018] In one optional embodiment, a second locking groove is provided on the nut, and the locking member protrudes axially from the side of the positioning piece facing the nut, and the second locking groove is plugged into and pulled into the locking member.

[0019] In one alternative embodiment, the positioning piece and the locking element are integrally formed.

[0020] The locking component of the present invention is detachably connected to the screw and the air intake cap. By circumferentially locking the screw and the air intake cap respectively, the circumferential relative positions of the screw and the air intake cap are guaranteed. When replacement or reinstallation is required, it does not need to be discarded and can be reused.

[0021] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures pointed out in the description, claims and drawings. Attached Figure Description

[0022] 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. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 A schematic diagram of a locking plate circumferentially locking a screw and an intake cap according to the prior art is shown;

[0024] Figure 2 A cross-sectional view is shown according to an embodiment of the present invention;

[0025] Figure 3 An exploded view is shown according to an embodiment of the present invention.

[0026] Explanation of reference numerals in the attached drawings: Locking component 1, Lock 11, Positioning piece 12, Screw 2, Nut 21, Second locking groove 211, Stud 22, Air inlet cap 3, Insertion end 31, Boss 32, First locking groove 33, Elastic retaining ring 4, Fixing area 51, Bending area 52, Threaded bracket 6. Detailed Implementation

[0027] 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.

[0028] The following discloses various implementation methods or embodiments of the described subject matter technical solutions. To simplify the disclosure, specific embodiments of one or more arrangements of the features are described below, but the embodiments are not intended to limit this specification. The connection between the first feature and the second feature described later in the specification can include implementations with direct connection, implementations that form additional features, and further, implementations that use one or more other intervening features to indirectly connect or combine the first feature and the second feature with each other, so that the first feature and the second feature are not directly connected.

[0029] This application discloses a reusable screw locking structure, which includes a locking component 1, a screw 2, and an insertion end 31.

[0030] in, Figure 3 An exploded view of an example of a screw-locking structure is shown, such as... Figure 3As shown, the insertion end 31 of the air intake cap 3 has a hole, and the stud 22 of the screw 2 is inserted into the insertion end 31 through the hole. A mechanism or structure with internal threads is fixed on the side of the insertion end 31 away from the screw 2. After the screw 2 is inserted into the insertion end 31, it is threadedly connected to the structure or mechanism with internal threads.

[0031] like Figure 2 A cross-sectional view of this application is shown, wherein, taking the screw 2 fastening the air intake cap 3 as an example, the above-mentioned insertion end 31 is opened on the air intake cap 3, and a threaded bracket 6 with internal threads is installed inside the air intake cap 3. After the screw 2 is inserted into the air intake cap 3, it is threadedly connected to the threaded bracket 6.

[0032] In the embodiments disclosed in this application, such as Figure 2 As shown, the locking component 1 is detachably connected to the screw 2. When the locking component 1 is connected to the screw 2, the locking component 1 and the screw 2 are circumferentially locked, and the two can maintain their circumferential relative positions unchanged. The locking component 1 is also detachably connected to the air intake cap 3. When the locking component 1 is connected to the air intake cap 3, the locking component 1 and the insertion end 31 are circumferentially locked, and the two can also maintain their circumferential relative positions unchanged.

[0033] like Figure 2 As shown, this application connects the locking component 1 to both the screw 2 and the insertion end 31. Since the locking component 1 can lock the screw 2 circumferentially when connected to the screw 2, and can also lock the insertion end 31 circumferentially when connected to the insertion end 31, when the locking component 1 is connected to both the insertion end 31 and the screw 2, it can lock the screw 2 and the insertion end 31 circumferentially, ensuring the relative circumferential positions of the screw 2 and the insertion end 31. Furthermore, since the locking component 1 is detachably connected to both the screw 2 and the insertion end 31, the locking component 1 can be removed from the screw 2 and the insertion end 31 for repeated use.

[0034] For ease of understanding and to simplify the description, the following examples all use the connection between screw 2 and insertion end 31 on air intake cap 3 as an example.

[0035] like Figure 3As shown, in some examples, the locking assembly 1 consists of a positioning piece 12 and a locking member 11. The locking member 11 and the positioning piece 12 can be integrally formed by casting. The locking assembly 1 is located between the nut 21 of the screw 2 and the insertion end 31 of the air intake cap 3. The locking assembly 1 is plugged and pulled to the screw 2 and the air intake cap 3 through the locking member 11, thereby simultaneously locking the screw 2 and the air intake cap 3 circumferentially. For example, the locking member 11 may include more than two, and the nut 21 and the insertion end 31 are respectively provided with a first locking groove 33 and a second locking groove 211 corresponding to and matching the locking member 11. By simultaneously plugging and pulling the locking member 11 with the first locking groove 33 and the second locking groove 211, the screw 2 and the air intake cap 3 can be circumferentially locked at the same time.

[0036] It should be understood that in some other embodiments, the above-mentioned locking member 11 may also include one. When the locking member 11 includes one, the locking member 11 may adopt a structure that is difficult to rotate, such as having multiple angles, so that it can also play a circumferential limiting effect after being inserted into the matching first locking groove 33 and second locking groove 211.

[0037] In order to ensure that the locking component 1 does not displace radially or axially during operation, in addition to the above, the embodiments disclosed in this application also include an axial locking structure and a radial locking structure, wherein the axial locking structure is used to axially lock the locking component 1, and the radial locking structure is used to radially lock the locking component 1.

[0038] In a more specific example, such as Figure 2 As shown, the insertion end 31 is provided with a boss 32 that protrudes axially from the insertion end 31. This boss 32 serves as a radial positioning structure for radially locking the locking assembly 1. The boss 32 is arranged circumferentially along the insertion end 31, and the positioning piece 12 in the locking assembly 1 is sleeved on the outside of the boss 32. In some examples, such as Figure 3 As shown, the boss 32 is an annular boss 32, which is coaxially arranged with the insertion end 31, and the positioning piece 12 is an annular shape, which is integrally fitted on the outside of the boss 32.

[0039] It should be understood that in other examples, the aforementioned boss 32 may also include multiple bosses 32 arranged around the insertion hole on the insertion end 31. The boss 32 may be arc-shaped or other structures. In addition, the aforementioned positioning piece 12 is not limited to annular, as long as it has a through hole inside that matches the outer edge of the boss 32.

[0040] like Figure 2As shown, this application can radially limit the positioning piece 12 by sleeved on the outside of the boss 32, thereby preventing it from radially swinging during operation. Since the positioning piece 12 is fixedly connected to the locking member 11, it can achieve the effect of radially locking the entire locking assembly 1.

[0041] In the embodiments disclosed in this application, such as Figure 2 As shown, axial locking is achieved by using an elastic retaining ring 4 as the axial locking structure. The elastic retaining ring 4 is located between the positioning piece 12 and the nut 21. The elastic retaining ring 4 is sleeved on the outside of the locking component 11. After the screw 2 is assembled with the air intake cap 3, the nut 21 squeezes the positioning piece 12 through the elastic retaining ring 4, thereby axially limiting the locking component 1.

[0042] In the example above that includes the positioning piece 12, the locking piece 11, and the boss 32, as follows: Figure 3 As shown, the first locking groove 33 can be radially formed on the boss 32, and the second locking groove 211 can be axially formed on the nut 21. The number of the first locking groove 33, the second locking groove 211 and the locking member 11 are in one-to-one correspondence. The locking member 11 is radially protruding from the inner side of the positioning piece 12, and the end away from the positioning piece 12 also protrudes axially from the side of the positioning piece 12 facing the nut 21. For example, the locking member 11 can be an L-shaped structure, with the horizontal part on one side extending radially along the positioning piece 12 and fixed to the inner side of the positioning piece 12, and the vertical part on the other side extending towards the nut 21. The horizontal part of the L-shaped locking member 11 is inserted into the first locking groove 33, and the end extending towards the nut 21 is plugged into and pulled into the second locking groove 211.

[0043] The assembly process of this application is as follows: First, tighten the locking piece 11 together with the screw 2 to the specified torque, then reverse the screw 2, and align the first locking groove 33 on the screw 2 with the second locking groove 211 on the insertion end 31 by retraction. Then, insert the positioning piece 12 and sleeve it on the outside of the boss 32, so that the locking piece 11 is simultaneously inserted into the first locking groove 33 and the second locking groove 211. Next, insert the elastic retaining ring 4 into the retaining ring groove formed between the nut 21 and the positioning piece 12 to axially position the entire locking assembly 1. The elastic retaining ring 4 is an elastic element, which can be stretched by applying external force during installation and inserted between the nut 21 and the positioning piece 12. After installation, the elastic retaining ring 4 returns to its original shape and engages in the retaining ring groove to prevent the positioning piece 12 from coming out, thereby restricting the relative rotation of the nut 21 and the air intake cap 3 to achieve anti-loosening. The structure after assembly is as follows. Figure 2 As shown, the locking assembly 1 can lock the screw 2 and the air intake cap 3, ensuring that their relative positions remain stable.

[0044] In existing technologies, such as Figure 1As shown, disposable locking plates, in addition to the disadvantage of not being reusable, also have the disadvantage of not being able to be bent repeatedly during assembly. Furthermore, in order to induce plastic deformation in the locking plate, it is necessary to strike the locking plate during the assembly, bending, or disassembly process. The striking process can easily cause permanent damage to adjacent parts, affecting the quality of the parts.

[0045] Meanwhile, since the locking plate is usually made of sheet metal, it is difficult to ensure the flatness of the installation, which can easily cause the screw 2 to be installed at an angle. If the screw 2 is disassembled and reassembled, a new locking plate needs to be replaced, resulting in a great waste.

[0046] The reusable screw locking structure disclosed in this application has the following advantages: First, the locking component 1 can be reused. Second, the locking component 1 does not need to be hammered or bent during installation, and will not cause damage to surrounding parts. Furthermore, since it is also provided with a radial locking structure and an axial locking mechanism, it can ensure the firmness and stability of the locking component 1 during operation. In addition, this application provides a boss 32 as an axial locking structure, so that there is a completely fitting end face between the air intake cap 3 and the nut 21, thereby achieving a more secure fastening effect.

[0047] In the description of this specification, it should be understood that the terms "center," "length," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "inner," "outer," "circumferential," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this specification and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this specification.

[0048] In the description of this specification, "multiple" means at least two, such as two, three, etc., unless otherwise expressly and specifically limited.

[0049] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0050] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A reusable screw locking structure, characterized in that, Including locking components (1); and Screw (2), the locking assembly (1) is detachably connected to the screw (2), and when the locking assembly (1) is connected to the screw (2), the locking assembly (1) and the screw (2) are circumferentially locked; as well as Insertion end (31), the screw (2) can be inserted into the insertion end (31), the locking component (1) is detachably connected to the insertion end (31), when the locking component (1) is connected to the insertion end (31), the locking component (1) and the insertion end (31) are circumferentially locked; the insertion end (31) is opened on the air intake cap (3); When the screw (2) is inserted into the insertion end (31), the locking assembly (1) is simultaneously connected to both the screw (2) and the insertion end (31); The locking assembly (1) includes a locking member (11) located between the nut (21) of the screw (2) and the insertion end (31), and the locking member (11) can be plugged and unplugged into both the screw (2) and the insertion end (31) simultaneously; the locking assembly (1) also includes a positioning piece (12), on which the locking member (11) is disposed; it also includes an axial locking structure for axially locking the locking assembly (1); and a radial locking structure for radially locking the locking assembly (1); the radial locking structure includes a boss (32) axially protruding from the insertion end (31), the boss (32) extending along the insertion end (31)... The end (31) is circumferentially arranged, and the positioning piece (12) is sleeved on the outside of the boss (32); the boss (32) is provided with a first locking groove (33), the locking member (11) protrudes radially from the inside of the positioning piece (12), and the end away from the positioning piece (12) also protrudes axially from the side of the positioning piece (12) facing the nut (21); the first locking groove (33) is plugged and pulled connected with the locking member (11); the nut (21) is provided with a second locking groove (211), the locking member (11) protrudes axially from the side of the positioning piece (12) facing the nut (21), and the second locking groove (211) is plugged and pulled connected with the locking member (11); The locking member (11) has an L-shaped structure. The horizontal part on one side extends radially along the positioning piece (12) and is fixed to the inside of the positioning piece (12). The vertical part on the other side extends toward the nut (21). The horizontal part of the L-shaped locking member (11) is inserted into the first locking groove (33), and the end extending toward the nut (21) is plugged into the second locking groove (211). The axial locking structure includes an elastic retaining ring (4), which is located between the positioning piece (12) and the nut (21) and is sleeved on the outside of the locking member (11); First, tighten the locking piece (11) together with the screw (2) to the specified torque, then reverse the screw (2) and align the first locking groove (33) on the screw (2) with the second locking groove (211) on the insertion end (31) by backing back. Then, install the positioning piece (12) and put it on the outside of the boss (32) so that the locking piece (11) is inserted into the first locking groove (33) and the second locking groove (211) at the same time. Then, put the elastic retaining ring (4) into the retaining ring groove formed between the nut (21) and the positioning piece (12) to axially position the entire locking assembly (1). Apply external force to extend the elastic retaining ring (4) and install it between the nut (21) and the positioning piece (12). After installation, the elastic retaining ring (4) returns to its original shape and locks in the retaining ring groove to prevent the positioning piece (12) from coming out, thereby limiting the relative rotation of the nut (21) and the air intake cap (3) to achieve anti-loosening.

2. The screw locking structure as described in claim 1, characterized in that, The positioning piece (12) and the locking piece (11) are integrally formed.

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