Fixed connecting mechanism

Abstract

The present application relates to the technical field of aircraft mounting and fixing, and discloses a fixed connecting mechanism used for connecting a first mounting component and a second mounting component, the first mounting component and the second mounting component being respectively provided with a first mounting component hole and a second mounting component hole. The connecting mechanism comprises a connecting base and a connecting slider. The connecting base comprises an axially extending inner cavity, a first base opening, and a second base opening. The connecting base abuts against a mounting component group, and the second base opening is provided opposite to the first mounting component hole. The connecting slider is provided with a slider through hole. The connecting slider is capable of entering the inner cavity from the first base opening. A fixing bolt passes through the slider through hole, and during application of a load by the fixing bolt, the axes of the fixing bolt, the connecting base, and the connecting slider gradually approach each other, and simultaneously the slider through hole is aligned with the second base opening, so that the fixing bolt passes through the second base opening, then aligns with and passes through the first mounting component hole and the second mounting component hole, and fastens and connects the mounting component group. The fixed connecting mechanism of the present application reduces the mounting accuracy requirements of a mounting bolt and a mounting hole.

Description

Fixed connection mechanism Technical Field

[0001] This application relates to the field of aircraft installation and fixing technology, and in particular to a fixing connection mechanism. Background Technology

[0002] The installation and fixing of aircraft components, such as the fixing of battery packs to the fuselage and the fixing of the cockpit to the wings, commonly uses two main methods: bolt tension and bolt shear. The stress analysis for both is as follows: 1. Bolt Tensile Stress: Because thin-shell structures perform poorly under normal surface forces, bolt tensile stress is not recommended for thin-shell structures. The connection strength of bolt tensile stress is highly dependent on the bolt preload. When the preload loosens due to vibration or other reasons, the connection strength will decrease significantly. 2. Bolt Shear Stress: Bolt shear stress is a commonly used method in the aviation industry, but it requires high installation accuracy (usually using clearance fits or interference fits). This high precision requirement complicates the installation and disassembly process, requiring special tooling and fixtures. For example, using the traditional bolt shear method to install battery packs to the fuselage, aligning the battery mounting holes with the fuselage mounting holes requires a specialized battery installation vehicle and specialized installation fixtures. On uneven or unpaved ground, it is even more difficult to use the installation vehicle to align the mounting holes. Because of the battery's large weight, a large number of personnel are required to assemble it. Summary of the Invention

[0003] The purpose of this application is to provide a fixed connection mechanism that reduces the installation accuracy requirements of mounting bolts and mounting holes.

[0004] To address the aforementioned technical problems, this application provides a fixed connection mechanism for connecting an assembly of mounting components. The assembly includes at least a first mounting component and a second mounting component. The first mounting component has a first mounting component hole, and the second mounting component has a second mounting component hole. The fixed connection mechanism includes a connecting base and a connecting slider. The connecting base includes an axially extending inner cavity and a first base opening and a second base opening communicating with the inner cavity. The connecting base abuts against the assembly of mounting components, and the second base opening is opposite to the first mounting component hole. The connecting slider has an axially extending slider through hole. The connecting slider can enter the inner cavity from the first base opening and can move freely within the inner cavity. A fixing bolt passes through the slider through hole, and during the process of receiving the installation load applied by the fixing bolt, the axis of the fixing bolt gradually approaches the axis of the connecting base and the connecting slider, while the slider through hole aligns with the second base opening, so that the fixing bolt, after passing through the second base opening, aligns with the first mounting component hole and the second mounting component hole, thus fastening the assembly of mounting components.

[0005] Optionally, the inner wall of the cavity gradually decreases axially inward from the opening of the first base to the opening of the second base.

[0006] Optionally, the connecting slider has radial and axial degrees of freedom within the inner cavity.

[0007] Optionally, the connecting slider includes a slider seat and a spherical bearing axially disposed within the slider seat, the spherical bearing being able to oscillate within the slider seat.

[0008] Optionally, the diameter of the spherical bearing is larger than the diameter of the fixing bolt, so that the fixing bolt can be inserted into the spherical bearing.

[0009] Optionally, the second base opening and the first mounting component hole are both larger than the slider through hole, so that the fixing bolt can move radially within the second base opening and the first mounting component hole after passing through the slider through hole, the second base opening, and the first mounting component hole.

[0010] Optionally, during the installation load applied by the fixing bolt, the axis of the fixing bolt gradually approaches and aligns with the axis of the connecting base and the connecting slider.

[0011] Optionally, the inner cavity is a conical cavity, and the connecting slider is a conical slider.

[0012] Optionally, the connecting base includes a stacked base, a vibration isolation layer, and a tapered pad ring, wherein the vibration isolation layer is used to increase radial damping.

[0013] Optionally, the opening of the first base is sealed by a slider cover to prevent the connecting slider from sliding out of the inner cavity.

[0014] The fixed connection mechanism of this application reduces the installation accuracy requirements of the mounting bolts and mounting holes. Attached Figure Description

[0015] Figure 1 shows a structural schematic diagram of the fixed connection mechanism and mounting component assembly according to an embodiment of this application;

[0016] Figure 2 shows a structural schematic diagram of the fixed connection mechanism and the mounting component assembly before the connecting bolts in an embodiment of this application;

[0017] Figure 3 shows an exploded view of the fixed connection mechanism according to an embodiment of this application;

[0018] Figure 4 shows an exploded view of the connecting base and connecting slider of the fixed connection mechanism according to an embodiment of this application. Detailed Implementation

[0019] The following specific examples illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. This application can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and application systems without departing from the spirit of this application. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.

[0020] The embodiments of this application will now be described in detail with reference to the accompanying drawings, so that those skilled in the art can easily implement the application. This application may be embodied in many different forms and is not limited to the embodiments described herein.

[0021] For the purpose of clearly describing this application, devices that are not relevant to the description are omitted, and the same or similar components throughout the specification are given the same reference numerals.

[0022] Throughout this specification, when it is said that a device is "connected" to another device, this includes not only "direct connection" but also "indirect connection" by placing other components in between. Furthermore, when it is said that a device "comprises" a certain constituent element, unless otherwise stated otherwise, this does not exclude other constituent elements, but rather implies that other constituent elements may be included.

[0023] When we say that a device is "above" another device, this can mean that it is directly above the other device, or it can mean that other devices are present in between. Conversely, when we say that a device is "directly" "above" another device, there are no other devices present in between.

[0024] Although the terms first, second, etc., are used in some instances herein to describe various elements, these elements should not be limited by these terms. These terms are used only to distinguish one element from another. For example, descriptions such as first interface and second interface, etc. Furthermore, as used herein, the singular forms “a,” “an,” and “the” are intended to also include the plural forms unless the context indicates otherwise. It should be further understood that the terms “comprising,” “including,” indicate the presence of the stated feature, step, operation, element, component, item, kind, and / or group, but do not exclude the presence, occurrence, or addition of one or more other features, steps, operations, elements, components, items, kinds, and / or groups. The terms “or” and “and / or” as used herein are interpreted as inclusive, or mean any one or any combination thereof. Thus, “A, B, or C” or “A, B, and / or C” means “any one of: A; B; C; A and B; A and C; B and C; A, B, and C.” Exceptions to this definition occur only when combinations of elements, functions, steps, or operations are inherently mutually exclusive in some way.

[0025] The technical terms used herein are for reference only to specific embodiments and are not intended to limit the scope of this application. The singular form used herein includes the plural form unless the statement explicitly indicates otherwise. The word "comprising" as used in the specification means to specify a particular characteristic, region, integer, step, operation, element, and / or component, and does not exclude the presence or addition of other characteristics, regions, integers, steps, operations, elements, and / or components.

[0026] Terms such as "below" and "above" indicating relative space are used to more easily explain the relationship of one device relative to another in the accompanying drawings. These terms refer not only to their meaning as shown in the drawings but also to other meanings or operations of the device in use. For example, if the device in the drawings is flipped, a device previously described as "below" another device may now be described as "above" another device. Therefore, the exemplary term "below" encompasses both above and below. The device may be rotated 90° or other angles, and the terms representing relative space are interpreted accordingly.

[0027] Although not explicitly defined, all terms, including technical and scientific terms used herein, shall have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. Terms defined in commonly used dictionaries shall be further interpreted as having a meaning consistent with the relevant technical literature and the content of this present application, and shall not be over-interpreted as having an ideal or overly formulaic meaning unless otherwise defined.

[0028] The fixed connection mechanism of this application embodiment is often used for the installation and fixing of components between aircraft, such as the fixing of battery packs to fuselage. This type of fixed installation has high requirements for installation accuracy.

[0029] The embodiments of this application are described below with reference to the accompanying drawings. As shown in Figures 1 and 2, the fixing connection mechanism 123 of this application embodiment is used to connect the mounting component assembly. The mounting component assembly includes a first mounting component 100 and a second mounting component 200. The first mounting component 100 has a first mounting component hole (not shown in the figure) at the mounting position, and the second mounting component 200 has a second mounting component hole (not shown in the figure) at the mounting position. The fixing connection mechanism 123 is located on one side of the mounting component assembly, and in this embodiment, it is located on one side of the first mounting component 100, but is not limited to this side. A fixing bolt 3 passes through the fixing connection mechanism 123, the first mounting component hole, and the second mounting component hole, and is threadedly connected to the mating nut 30, thereby fixing the first mounting component 100 and the second mounting component 200.

[0030] As shown in Figure 3, the fixed connection mechanism 123 includes a connecting base 1 and a connecting slider 2. The connecting base 1 abuts against the first mounting component 100 in the mounting component assembly. In one embodiment, the connecting base 1 can be fixed to the first mounting component 100 by mounting screws. Of course, in another embodiment, the connecting base 1 and the first mounting component 100 are integrally formed. The connecting base 1 includes an axially (X-axis) extending inner cavity 10, and a first base opening 11 and a second base opening 12 communicating with the inner cavity 10 on both sides, wherein the diameter of the first base opening 11 is larger than that of the second base opening 12. When the connecting base 1 is abutted against the first mounting component 100, the second base opening 12 is aligned with the hole of the first mounting component.

[0031] The connecting slider 2 has an axially extending slider through hole 20. The connecting slider 2 can enter the inner cavity 10 from the first base opening 11 and can move freely within the inner cavity 10. The fixing bolt 3 passes through the first base opening 11 and the slider through hole 20. During the installation load applied by the fixing bolt 3, the connecting slider 2 moves towards the mounting surface. The axis of the fixing bolt 3 gradually approaches the axis of the connecting base 1 and the connecting slider 2, while the slider through hole 20 is aligned with the second base opening 12. This allows the fixing bolt 3 to pass through the second base opening 12 and then align with the holes through the first and second mounting components. The first mounting component 100 and the second mounting component 200 of the mounting component assembly are then fastened together by the mating nut 30.

[0032] In this embodiment, both the second base opening 12 and the first mounting component hole are larger than the diameter of the slider through hole 20. Therefore, when a mounting load is applied to the fixing bolt 3, causing it to pass axially through the slider through hole 20, the second base opening 12, and the first mounting component hole, the fixing bolt 3 can move radially within a certain range of the second base opening 12 and the first mounting component hole, so that the fixing bolt 3 can be aligned with the second mounting component hole and the nut 30. During the tightening process, the axis of the bolt 3 gradually approaches the axis of the connecting base 1 and the connecting slider 2. In this case, even if there is some deviation between the fixing bolt 3 and the nut 30, it can be aligned with the nut 30 and tightened by the radial translation of the connecting slider 2.

[0033] It should be noted that the mounting component group is not limited to the two mounting components in the above embodiments, and may also include more mounting components that are fixedly connected to each other.

[0034] This application provides a freely movable connecting slider within the connecting base that can align with the axis of the mounting hole. This allows the slider's through hole to align with the opening of the second base, enabling the mounting bolts to pass through and fix the connecting mechanism and the mounting component assembly. This reduces the installation accuracy requirements between the mounting bolts and the mounting hole (threaded hole).

[0035] Specifically, in one embodiment, the inner wall of the inner cavity 10 gradually decreases axially from the first base opening 11 to the second base opening 12. The axial height of the connecting slider 2 is less than the axial height of the inner cavity 10, and the connecting slider 2 has radial and axial degrees of freedom within the inner cavity 10. An installation load is applied to the fixing bolt 3, causing it to pass axially through the slider through hole 20, the second base opening 12, and the first mounting component hole. The fixing bolt 3 can move radially within a certain range between the second base opening 12 and the first mounting component hole, allowing it to align with the second mounting component hole and the nut 30. During tightening, the axis of the bolt 3 gradually approaches the axes of the connecting base 1 and the connecting slider 2. In this case, even if there is some deviation between the fixing bolt 3 and the nut 30, it can be aligned with the nut 30 and tightened by the radial translation of the connecting slider 2. The gradually decreasing inner cavity wall can serve as an effective force transmission path, transferring all the load of the fixing bolt 3 to the mounting surface, saving time and effort. In one embodiment, when the fixing bolt 3 and nut 30 are fully tightened, the axis of the fixing bolt 3 is fully aligned with the axis of the connecting base 1 and the connecting slider 2.

[0036] In one embodiment, the inner cavity 10 is a conical cavity, and the connecting slider 2 is a conical slider. The conical base serves as the primary force transmission path and also positions the conical slider during fastening. The conical slider can move radially and axially within the conical cavity. Both the second base opening 12 and the first mounting component hole are larger than the slider through hole 20. Therefore, when an installation load is applied to the fixing bolt 3, causing it to axially pass through the slider through hole 20, the second base opening 12, and the first mounting component hole, the fixing bolt 3 can move radially within a certain range between the second base opening 12 and the first mounting component hole, allowing it to align with the second mounting component hole and the nut 30. During tightening, the axis of the bolt 3 gradually approaches the axes of the connecting base 1 and the connecting slider 2. In this case, even if there is some deviation between the fixing bolt 3 and the nut 30, it can be aligned with the nut 30 and tightened by the radial translation of the connecting slider 2.

[0037] The radial degree of freedom of the tapered slider is relaxed, allowing the fixing bolt 3 to translate on the required mounting surface. In one embodiment, the allowable range of movement for the fixing bolt 3 is a cylindrical space of ±5mm from the bolt axis. In this case, even if there is a deviation of less than 5mm between the fixing bolt 3 and the nut 30, it can be aligned with the threaded hole and tightened by translating the tapered slider.

[0038] Furthermore, as shown in Figure 4, the opening 11 of the first base can also be sealed by a slider cover plate 4 to prevent the connecting slider 2 from sliding out of the inner cavity 10. The slider cover plate 4 can be connected to the connecting base 1 by three fixing screws 5. The slider cover plate 4 can be a partially closed cover plate as shown in Figure 4, as long as it can prevent the slider cover plate 4 from sliding out of the inner cavity 10. The number of fixing screws 5 is not limited to three.

[0039] In one embodiment, as shown in FIG. 4, the connecting slider 2 includes a slider seat 21 and a spherical bearing 22 axially disposed within the slider seat 21. The diameter of the spherical bearing 21 is larger than the diameter of the fixing bolt 3, so that the fixing bolt 3 can pass through the spherical bearing 21. In one embodiment, the diameter of the spherical bearing 21 is smaller than the second base opening 12 and the first mounting component hole. The spherical bearing 22 can swing within the slider seat 21, allowing the fixing bolt 3 to swing to a certain extent, so that installation can still be performed even when the axis of the nut 30 corresponding to the fixing bolt 3 is not coaxial with the axis of the fixed connection mechanism 123. This design relaxes the angle restrictions between the mounting bolt and the nut (or threaded hole).

[0040] In one embodiment, as shown in FIG4, the connecting base 1 includes a base 1a, a vibration isolation layer 1b, and a conical ring 1c connected to each other. The vibration isolation layer 1b can be made of polyurethane vibration isolation pad to increase radial damping and block vibrations from the fixing hole side (or the fixing bolt side). The connecting base in this embodiment can play a role in filtering vibrations and reducing impact loads.

[0041] The above embodiments are merely illustrative of the principles and effects of this application. Any person skilled in the art can modify or alter the above embodiments without departing from the purpose of this application. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the purpose disclosed in this application should still be covered by the claims of this application.

Claims

1. A fixed connection mechanism for connecting a mounting component assembly, the mounting component assembly comprising at least a first mounting component (100) and a second mounting component (200), wherein the first mounting component (100) and the second mounting component (200) are respectively provided with corresponding first mounting component holes and second mounting component holes, characterized in that, The fixed connection mechanism includes a connecting base (1) and a connecting slider (2). The connecting base (1) includes an axially extending inner cavity (10), a first base opening (11) communicating with the inner cavity (10), and a second base opening (12). The connecting base (1) abuts against the mounting component assembly, and the second base opening (12) is disposed opposite to the first mounting component hole. The connecting slider (2) has an axially extending slider through hole (20), and the connecting slider (2) can enter the inner cavity (10) from the first base opening (11). And can move freely in the inner cavity (10), passing through the slider through hole (20) via a fixing bolt (3), and during the process of receiving the installation load applied by the fixing bolt (3), the axis of the fixing bolt (3) gradually approaches the axis of the connecting base (1) and the connecting slider (2), while the slider through hole (20) is aligned with the second base opening (12), so that after the fixing bolt (3) passes through the second base opening (12), it is aligned with the first mounting component hole and the second mounting component hole, and the mounting component assembly is fastened together.

2. The fixed connection mechanism according to claim 1, characterized in that, The inner wall of the cavity (10) gradually decreases axially from the first base opening (11) to the second base opening (12).

3. The fixed connection mechanism according to claim 1, characterized in that, The connecting slider (2) has radial and axial degrees of freedom within the inner cavity (10).

4. The fixed connection mechanism according to claim 1, characterized in that, The connecting slider (2) includes a slider seat (21) and a spherical bearing (22) axially disposed within the slider seat (21). The spherical bearing (22) can swing within the slider seat (21).

5. The fixed connection mechanism according to claim 4, characterized in that, The diameter of the spherical bearing (21) is larger than the diameter of the fixing bolt (3) so that the fixing bolt (3) can be inserted into the spherical bearing (21).

6. The fixed connection mechanism according to claim 1, characterized in that, The second base opening (12) and the first mounting component hole are both larger than the slider through hole (20) so that the fixing bolt (3) can move radially within the second base opening (12) and the first mounting component hole after passing through the slider through hole (20), the second base opening (12) and the first mounting component hole.

7. The fixed connection mechanism according to claim 1, characterized in that, During the installation load applied by the fixing bolt (3), the axis of the fixing bolt (3) gradually approaches and aligns with the axis of the connecting base (1) and the connecting slider (2).

8. The fixed connection mechanism according to claim 1, characterized in that, The inner cavity (10) is a conical cavity, and the connecting slider (2) is a conical slider.

9. The fixed connection mechanism according to claim 1, characterized in that, The connecting base (1) includes a stacked base (1a), a vibration isolation layer (1b), and a conical gasket (1c), wherein the vibration isolation layer (1b) is used to increase radial damping.

10. The fixed connection mechanism according to claim 1, characterized in that, The first base opening (11) is sealed by a slider cover plate (4) so ​​that the connecting slider (2) does not slide out of the inner cavity (10).

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