Bolted connection and bolt assembly comprising a bolted connection

Abstract

The invention relates to a bolted joint and a bolt assembly comprising the bolted joint. The bolted joint comprises: a main body, wherein an outer diameter of a main body middle section of the main body is different from an outer diameter of a main body first end section of the main body and an outer diameter of a main body second end section of the main body, and wherein the main body middle section is eccentric with respect to the main body first end section and the main body second end section; and a core, wherein an outer diameter of a core middle section of the core is smaller than an outer diameter of a core first end section of the core and an outer diameter of a core second end section of the core, and the outer diameter of the core first end section is equal to the outer diameter of the core second end section, wherein an outer circumference of the core first end section and an outer circumference of the core second end section are in a corresponding contact fit with an inner surface of the main body first end section and an inner surface of the main body second end section, and wherein an outer circumference of the core middle section is in a clearance with an inner surface of the main body middle section.

Description

TECHNICAL FIELD

[0001] The present application relates to a bolted joint, mainly used for connecting a single-ear piece and a double-ear piece structure, such as a wing flap mechanism, which can simultaneously meet the requirements of breakage safety and eccentric adjustment at the joint of the wing flap mechanism. The present application also relates to a bolt assembly comprising the bolted joint. BACKGROUND

[0002] The design of an aircraft wing requires both high structural safety, i.e. the aircraft should still be able to fly safely after the failure of a single component, and a smooth outer surface, i.e. the gap between the movable flap and the fixed box section should be as small as possible. Therefore, concepts such as multi-force transmission design, redundancy design, breakage safety design and gap compensation design are proposed for the design of the flap mechanism.

[0003] In order to improve the structural safety and achieve the adjustable function of the wing gap, the existing flap mechanism design has breakage safety bolt connections or eccentric adjustment bolt connections at different positions. This design increases the complexity of the overall structure installation, has many procedures and a long cycle.

[0004] Therefore, there is a need to further improve the existing connection structure. SUMMARY

[0005] In view of the above problems of the prior art, the purpose of the present application is to provide a multifunctional bolted joint that simultaneously meets the requirements of breakage safety and eccentric adjustment at one connection position, thereby providing a more reliable bolted joint for the installation of the aircraft wing flap.

[0006] In a first example of the bolted joint, the bolted joint comprises: a main body, which is a hollow cylindrical piece defining a central space, wherein an outer diameter of a main body middle section of the main body is different from an outer diameter of a main body first end section of the main body and an outer diameter of a main body second end section of the main body, and wherein the main body middle section is eccentric with respect to the main body first end section and the main body second end section, and the main body first end section and the main body second end section are concentric; and a core, which is inserted into the central space of the main body, wherein an outer diameter of a core middle section of the core is smaller than an outer diameter of a core first end section of the core and an outer diameter of a core second end section of the core, and the outer diameter of the core first end section is equal to the outer diameter of the core second end section, and wherein the core middle section, the core first end section and the core second end section are concentric, wherein an outer periphery of the core first end section and an outer periphery of the core second end section are in contact with an inner surface of the main body first end section and an inner surface of the main body second end section, respectively, and wherein there is a gap between an outer periphery of the core middle section and an inner surface of the main body middle section.

[0007] In a second example of the bolted connection, optionally including the first example, the outer diameter of the first end section of the body is greater than the outer diameter of the intermediate section of the body, and the outer diameter of the intermediate section of the body is greater than the outer diameter of the second end section of the body.

[0008] In a third example of the bolted connection, optionally including one or more of the first example and the second example, the intermediate section of the body has an eccentric dimension relative to the first end section of the body and the second end section of the body, and wherein the outer diameter of the first end section of the body is equal to the outer diameter of the intermediate section of the body plus twice the eccentric dimension, and wherein the outer diameter of the intermediate section of the body is equal to the outer diameter of the second end section of the body plus twice the eccentric dimension.

[0009] In a fourth example of the bolted connection, optionally including one or more of the first example through the third example, the outer periphery of the first end section of the body is provided with a circumferentially arranged radially protruding tooth forming a bolted connection gear.

[0010] In a fifth example of the bolted connection, optionally including one or more of the first example through the fourth example, the second end section of the body is provided with a radial through-going bore, and the second end section of the core is correspondingly provided with a radial through-going bore, together forming a bolted bolt hole.

[0011] In a sixth example of the bolted connection, optionally including one or more of the first example through the fifth example, the core is a solid rod.

[0012] In a seventh example of the bolted connection, optionally including one or more of the first example through the sixth example, the length of the body is the same as the length of the core, wherein the length of the first end section of the body is greater than the length of the first end section of the core, wherein the length of the second end section of the body is greater than the length of the second end section of the core, and wherein the length of the intermediate section of the body is less than the length of the intermediate section of the core.

[0013] In an eighth example of the bolted connection, optionally including one or more of the first example through the seventh example, the outer diameter of the second end section of the body, i.e. the first diameter dimension, and the outer diameter of the second end section of the core, i.e. the second diameter dimension, satisfy the following relationship:

[0014]

[0015] The present application also relates to a bolt assembly for connecting a single ear piece to a double ear piece, comprising: a bolt connector according to any one of the above examples, wherein the outer periphery of the first end section of the main body is provided with a circumferentially arranged radial protruding tooth, forming a bolt connection gear, and wherein the second end section of the main body is provided with a radial through hole, and the second end section of the core is correspondingly provided with a radial through hole, together forming a bolt latch hole; an anti-rotation clamping plate, the first end of the anti-rotation clamping plate comprising a toothed ring hole, the inner teeth of the toothed ring hole engaging with the teeth of the bolt connection gear, and the second end of the anti-rotation clamping plate comprising an interface; a clamping plate fastener, the interface being connected to the double ear piece by the clamping plate fastener; a safety pin, the safety pin passing through the bolt latch hole; and a safety nut, the safety nut being sleeved on the outer periphery of the second end section of the main body and cooperating with the safety pin.

[0016] The bolt connector of the present application can simultaneously meet the requirements of breakage safety and eccentric adjustment. The safety of the wing flap mechanism is improved, and the gap between the flap and the box section can be adjusted to improve the smoothness of the wing.

[0017] The bolt connector can be used to connect a single ear piece-double ear piece connection structure. The relative position of the ear joint of the middle single ear piece and the ear joints of the two sides double ear pieces is adjusted by rotating the eccentric bolt, and the adjustment of the installation gap of the flap is realized.

[0018] In the corresponding bolt assembly, the bolt connector is fixed after positioning by the engagement of the bolt connection gear of the bolt end and the teeth of the toothed ring hole of the anti-rotation clamping plate. The anti-rotation clamping plate is fixed to the structure of the double ear piece by the clamping plate fastener. The core for breakage safety is inserted into the inside of the main body of the bolt connector, and is connected and fixed together by the nut and the safety pin. The functions of eccentric adjustment and breakage safety are integrated.

[0019] Compared with the existing connection structure, the bolt connector of the present application can be used to universally connect the connection positions of the wing flap mechanism, and has good universality. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to describe the embodiments of the above and other features of the present application, a more particular description of the application briefly described above will be rendered by reference to the examples of the application illustrated in the drawings. It is to be understood that these drawings are only illustrative of the various embodiments of the application and should not be considered as limiting the scope thereof, which will be described and explained further with reference to the drawings and by using additional features and details. In the drawings:

[0021] Figure 1 is a perspective view of a bolt assembly according to a preferred embodiment of the present application;

[0022] Figure 2 isFigure 1 exploded view of the bolt assembly of

[0023] Figure 3 perspective view of a bolted joint according to a preferred embodiment of the invention;

[0024] Figure 4 perspective view of a bolted joint according to a preferred embodiment of the invention; Figure 3 cross-sectional view of the bolted joint of

[0025] Figure 5 perspective view of the core of the bolted joint of Figure 3

[0026] Figure 6 perspective view of the core of the bolted joint of Figure 5

[0027] Figures 1 to 6 drawn approximately to scale, however the dimensions in the drawings are merely illustrative and not necessarily drawn to scale, but are intended to clarify. In other embodiments, other relative dimensions can be used.

[0028] In this and in the following, like features appearing in different drawings are denoted by the same or similar reference numerals.

[0029] List of reference numerals:

[0030] 1 bolt assembly

[0031] 10 body

[0032] 11 first end section of the body

[0033] 12 intermediate section of the body

[0034] 13 second end section of the body

[0035] 20 core

[0036] 21 first end section of the core

[0037] 22 intermediate section of the core

[0038] 23 second end section of the core

[0039] 30 anti-rotation dog

[0040] 31 dog hole

[0041] 32 interface

[0042] 40 dog fastener

[0043] 50 cotter pin​​

[0044] 60 safety nut DETAILED DESCRIPTION

[0045] The present application will be further described with reference to the accompanying drawings, in which specific embodiments are shown. The following description is presented in terms of particular embodiments, which should not be interpreted as limiting the scope of the application. The description is presented for purposes of description rather than limitation, and the application is entitled to its full breadth of scope.

[0046] Figures 1-6 An xyz coordinate system is provided for reference. In one example, the z-axis can be a vertical axis (e.g., parallel to the gravity axis), the x-axis can be a lateral axis (e.g., horizontal axis), and the y-axis can be a longitudinal axis.

[0047] When referring to directions, positive can refer to the direction of the arrows of the y-axis, x-axis, and z-axis, and negative can refer to the opposite direction of the arrows of the y-axis, x-axis, and z-axis. A solid circle can represent an arrow and axis facing toward the view or positive to the view.

[0048] Figure 1 The bolt assembly 100 according to the preferred embodiment of the present application is schematically shown, which mainly comprises a bolt connector 1 for the connection of the double ear piece and the single ear piece, an anti-rotation clamp plate 30 and clamp plate fastener 40 for fixing the bolt connector 1 with the double ear piece, and a safety pin 50 and safety nut 60 for the self-fixing of the bolt connector 1. Figure 2 The bolt assembly 100 according to the preferred embodiment of the present application is schematically shown, which mainly comprises a bolt connector 1 for the connection of the double ear piece and the single ear piece, an anti-rotation clamp plate 30 and clamp plate fastener 40 for fixing the bolt connector 1 with the double ear piece, and a safety pin 50 and safety nut 60 for the self-fixing of the bolt connector 1. Figure 1 The bolt assembly 100 according to the preferred embodiment of the present application is schematically shown, which mainly comprises a bolt connector 1 for the connection of the double ear piece and the single ear piece, an anti-rotation clamp plate 30 and clamp plate fastener 40 for fixing the bolt connector 1 with the double ear piece, and a safety pin 50 and safety nut 60 for the self-fixing of the bolt connector 1.

[0049] Figure 3 The bolt connector 1 according to the preferred embodiment of the present application is schematically shown, which mainly comprises a main body 10 for eccentric adjustment and a core 20 for breakage safety, wherein the core 20 is inserted into the main body 10.

[0050] The main body 10 is a hollow cylindrical piece, i.e., the main body 10 can define a central space, and can extend in the length direction of the main body 10.

[0051] The main body 10 comprises, in sequence in the length direction, a main body first end section 11, a main body middle section 12, and a main body second end section 13, wherein the main body middle section 12 can be the connection with the ear piece of the single ear piece, and the end sections on both sides can be the connection with the ear piece of the double ear piece. The outer diameter of the main body middle section 12 can be different from the outer diameter of the main body first end section 11 and the outer diameter of the main body second end section 13.

[0052] As Figure 3 shown in the preferred embodiment of the present application, the outer diameter of the first end section 11 of the main body is greater than the outer diameter of the middle section 12 of the main body, and the outer diameter of the middle section 12 of the main body is greater than the outer diameter of the second end section 13 of the main body.

[0053] Figure 4 A cross-sectional view of the bolted joint 1 of Figure 3 is schematically shown, as viewed in the positive direction of the z-axis and taken along the x-y plane, wherein the diameters of the respective sections of the main body 10 of the bolted joint are shown, in particular, the first end section 11 of the main body has a diameter D1, the middle section 12 of the main body has a diameter D2, and the second end section 13 of the main body has a diameter D3.

[0054] In the present application, the middle section 12 of the main body is eccentric with respect to the first end section 11 of the main body and the second end section 13 of the main body, and the first end section 11 of the main body and the second end section 13 of the main body are concentric.

[0055] In detail, as shown in the cross-sectional view of Figure 4 , the middle section 12 of the main body can have an eccentricity e with respect to the first end section 11 of the main body and the second end section 13 of the main body, the eccentricity e being dependent on the actual eccentricity adjustment requirements.

[0056] The eccentricity e represents the distance by which the common central axis of the first end section 11 of the main body and the second end section 13 of the main body is offset from the central axis of the middle section 12 of the main body.

[0057] Further, the outer diameter D1 of the first end section 11 of the main body is equal to the outer diameter D2 of the middle section 12 of the main body plus twice the eccentricity e, and the outer diameter D2 of the middle section 12 of the main body is equal to the outer diameter D3 of the second end section 13 of the main body plus twice the eccentricity e, the following relationship can be satisfied:

[0058] D1 = D2 + 2e;

[0059] D2 = D3 + 2e.

[0060] Figure 5 A perspective view of the core of the bolted joint of Figure 3 is schematically shown. The core 20 is inserted into the central space defined by the main body 10. Preferably, from the first end of the main body 10. The core 20 is a solid rod.

[0061] The core 20 comprises in sequence in length direction a core first end section 21, a core middle section 22 and a core second end section 23, and the outer diameter of the core middle section 22 is smaller than the outer diameter of the core first end section 21 and the outer diameter of the core second end section 23 of the core 20, and the outer diameter of the core first end section 21 is equal to the outer diameter of the core second end section 23.

[0062] Figure 6 The cross-sectional view of the bolted joint 1 is shown schematically Figure 5 The cross-sectional view of the core 20 of the bolted joint 1 is shown schematically from the positive direction of the z-axis and taken along the x-y plane, wherein the diameters of the respective sections of the core 20 of the bolted joint are shown, in particular the core first end section 11 has a diameter d1, the core middle section 12 has a diameter d2, and the core second end section 13 has a diameter d3.

[0063] In the present application, the core middle section 22, the core first end section 21 and the core second end section 23 are concentric.

[0064] Now returning to Figure 4 The outer periphery of the core first end section 21 and the outer periphery of the core second end section 23 can be in contact fit with the inner surface of the body first end section 11 and the inner surface of the body second end section 13, respectively. There is a gap between the outer periphery of the core middle section 22 and the inner surface of the body middle section 12.

[0065] In the preferred embodiment, the diameter relationship of the three sections of the core is d1 = d3, d2 = d1 - 1 (unit: mm). Thus, there is a 0.5 mm gap between the diameter d2 of the core middle section 22 and the inner surface of the body middle section 12. Therefore, the core 20 which plays a role of breakage safety does not participate in the shear load transmitted by the earpieces of the mono ear piece and the double ear piece. Only when the body 10 which plays a role of eccentric adjustment is broken, so that the mono ear piece contacts the core middle section 22 of the core 20, the load is borne, realizing the breakage safety performance of the bolted joint 1 which can still bear the load after the body 10 is broken.

[0066] Now returning to Figure 4 As shown in the figure, in the present application, the length of the body 10 is the same as the length of the core 20, and in order to better avoid the load borne by the core 20 at the variable cross-sections of the core middle section 22 and the core first end section 21, the core second end section 23, the length of the body first end section 11 is greater than the length of the core first end section 21, i.e. greater than x1, the length of the body second end section 13 is greater than the length of the core second end section 23, i.e. greater than x2, and the length of the body middle section 12 is smaller than the length of the core middle section 22, i.e. smaller than x1 + x2.

[0067] In the preferred embodiment, the length of the core middle section 22 of the core 20 is 2 mm longer than the length of the body middle section 12 of the body 10, while the lengths of the two side end sections are each 1 mm shorter, so as to avoid the core 20 of the bolted joint 1 from bearing load at the variable cross-section.

[0068] Further, in order to ensure that the strength of the core 20, which plays a safety role in the event of breakage of the eccentric bolt, still meets the design requirements after the eccentric bolt breaks, the outer diameter D3 of the body second end section 13 and the outer diameter d3 of the core second end section 23 satisfy the following relationship:

[0069]

[0070] Now returning Figure 2 , Figure 2 schematically shows Figure 1 an exploded view of the bolt assembly 1000, which mainly includes the bolted joint 1 described above, the anti-rotation clamping plate 30 and the clamping plate fastener 40 for fixing the bolted joint 1 with the double lug, and the safety pin 50 and the safety nut 60 for self-fixing of the bolted joint 1.

[0071] In the preferred embodiment, the bolted joint 1 further includes a bolted joint gear. Preferably, the outer periphery of the body first end section 11 is provided with radially protruding teeth arranged in a circle, forming the bolted joint gear.

[0072] The first end of the anti-rotation clamping plate 30 includes a toothed ring hole 31, the inner teeth of which are engaged with the teeth of the bolted joint gear. The second end of the anti-rotation clamping plate 30 includes an interface portion 32, which is connected to the lug of the double lug by the clamping plate fastener 40, achieving the anti-loosening and anti-rotation functions of the bolted joint 1.

[0073] In the preferred embodiment, the bolted joint 1 further includes a bolt insertion hole. Preferably, the body second end section 13 is provided with a radial through hole, and the core second end section 23 is correspondingly provided with a radial through hole, together forming the bolt insertion hole.

[0074] The safety pin 50 passes through the bolt insertion hole, and the safety nut 60 is sleeved on the outer periphery of the body second end section 13 and cooperates with the safety pin 50. The core 20 is fixed to the body 10 by the safety pin 50.

[0075] The above, in order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme of the present application is clearly and completely described in combination with the specific embodiments of the present application and the drawings.

[0076] While various embodiments have been described above, it should be understood that they have been described only by way of example and not as limitations. Numerous specific details have been set forth in order to provide a thorough understanding of the inventive concepts. However, it is contemplated that the inventive concepts can be practiced without specific use of the various details. Indeed, various modifications can be made in the embodiments described above while still attaining the beneficial results of the inventive concepts.

[0077] Accordingly, the above-described embodiments are to be considered in all respects as illustrative and not restrictive, and the scope of the application should be determined not by the embodiments described, but by the claims that follow.

[0078] Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of the present application. The present disclosure also includes various modifications, variations, and equivalents of the embodiments. In addition, various combinations, modes, and further inclusions of only one element, more than one, or less than one of other combinations, modes are within the scope and spirit of the present disclosure.

Claims

1. Bolted joint, the bolted joint (1) comprising: - a body (10) which is a hollow cylinder defining a central space, - wherein the outer diameter of a body middle section (12) of the body (10) is different from the outer diameter of a body first end section (11) and of a body second end section (13) of the body (10), and - wherein the body middle section (12) is eccentric with respect to the body first end section (11) and to the body second end section (13), and the body first end section (11) and the body second end section (13) are concentric; and - a core (20) inserted in the central space of the body (10), - wherein the outer diameter of a core middle section (22) of the core (20) is smaller than the outer diameter of a core first end section (21) and of a core second end section (23) of the core (20), and the outer diameter of the core first end section (21) is equal to the outer diameter of the core second end section (23), and - wherein the core middle section (22), the core first end section (21) and the core second end section (23) are concentric, - wherein the outer periphery of the core first end section (21) and the outer periphery of the core second end section (23) are in contact with the inner surface of the body first end section (11) and of the body second end section (13), respectively, and - wherein the outer periphery of the core middle section (22) is in clearance with the inner surface of the body middle section (12), - wherein the length of the body first end section (11) is greater than the length of the core first end section (21), - wherein the length of the body second end section (13) is greater than the length of the core second end section (23), and - wherein the length of the body middle section (12) is smaller than the length of the core middle section (22).

2. Bolted joint according to claim 1, characterized in that - the outer diameter of the body first end section (11) is greater than the outer diameter of the body middle section (12), and the outer diameter of the body middle section (12) is greater than the outer diameter of the body second end section (13).

3. Bolted joint according to claim 2, characterized in that - the body middle section (12) has an eccentricity size (e) with respect to the body first end section (11) and to the body second end section (13), and - wherein the outer diameter of the body first end section (11) is equal to the outer diameter of the body middle section (12) plus twice the eccentricity size (e), and - wherein the outer diameter of the body middle section (12) is equal to the outer diameter of the body second end section (13) plus twice the eccentricity size (e).

4. Bolted joint according to claim 1, characterized in that The outer periphery of the first end section (11) of the main body is provided with circumferentially arranged radially protruding teeth forming a bolted gear.

5. The bolted joint according to claim 1, wherein The second end section (13) of the main body is provided with a radial through hole and the second end section (23) of the core is correspondingly provided with a radial through hole, together forming a bolted latch hole.

6. The bolted joint according to claim 1, wherein The core (20) is a solid rod.

7. The bolted joint according to claim 1, wherein The length of the main body (10) is the same as the length of the core (20).

8. The bolted joint according to claim 1, wherein The outer diameter of the second end section (13) of the main body, i.e. the first diameter size (D3), and the outer diameter of the second end section (23) of the core, i.e. the second diameter size (d3), satisfy the following relationship: 。 9. A bolt assembly for the connection of a single ear member to a double ear member, characterised in that, The bolt assembly comprises: The bolted joint (1) according to any one of claims 1-8, wherein the outer periphery of the first end section (11) of the main body is provided with circumferentially arranged radially protruding teeth forming a bolted gear, and wherein the second end section (13) of the main body is provided with a radial through hole and the second end section (23) of the core is correspondingly provided with a radial through hole, together forming a bolted latch hole; An anti-rotation clamping plate (30), a first end of the anti-rotation clamping plate (30) comprising a toothed gear hole (31), the inner teeth of the toothed gear hole (31) meshing with the teeth of the bolted gear, and a second end of the anti-rotation clamping plate (30) comprising an interface portion (32); A clamping plate fastener (40), the interface portion (32) being connected to the double lug piece by the clamping plate fastener (40); A safety pin (50), the safety pin (50) passing through the bolted latch hole; and A safety nut (60), the safety nut (60) being sleeved on the outer periphery of the second end section (13) of the main body and cooperating with the safety pin (50).

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