Anti-loose fastener with bolt lightening hole reserved

Abstract

The utility model belongs to the field of undercarriage structure design, and particularly relates to an anti-loose fastener with a bolt lightening hole reserved, the anti-loose fastener comprises a clamping ring, a nut, a fastened part and a bolt, the clamping ring is provided with a first key tooth and a second key tooth; the bolt is provided with a first key groove. The nut is provided with a second key groove. The bolt penetrates through a fastened part to be in threaded connection with the nut, the first key teeth of the clamping ring are matched with the first key grooves for locking, the second key teeth of the clamping ring are matched with the second key grooves for locking, the reducing space of the bolt can be effectively saved, and positions are provided for positioning and mounting of other parts and equipment. In the aspect of cost, the structural form of an existing part is not changed, use of a cotter pin is reduced, machining of a clamping ring part is newly added, a new function is given to a traditional bolt connection form, and structural design of an aircraft is facilitated.

Description

Technical Field

[0001] The present application belongs to the field of landing gear structure design, and in particular relates to an anti-loosening fastener with a retained bolt lightening hole. Background Art

[0002] Conventional aviation parts are usually fastened in the form of nuts and washers, and the bolts and nuts are locked by the safety pins. The split pins are installed through the lightening holes of the bolts and are perpendicular to the center axis. With the expansion of aircraft functions, structural parts often need to be connected to system pipelines and other equipment. Some equipment needs to be positioned and installed using bolt lightening holes. At this time, the existence of traditional split pins brings obstacles and difficulties to the installation and positioning of the equipment. Utility Model Content

[0003] In order to solve the above problems, the present application provides an anti-loosening fastener with a bolt-reducing hole, comprising a clamping ring, a nut, a fastened part, and a bolt, wherein:

[0004] The clamping ring has a first key tooth and a second key tooth; the bolt has a first key groove, and the nut has a second key groove; the bolt passes through the fastened part and is threadedly connected with the nut, the first key tooth of the clamping ring cooperates with the first key groove to stop, and the second key tooth cooperates with the second key groove to stop.

[0005] Preferably, the end faces of the clamping ring and the nut are provided with screw holes, and the clamping ring and the nut are fastened and connected through the screw holes.

[0006] Preferably, the first keyway is located at the outer edge of the bolt, the second keyway is located at the outer edge of the nut, the inner edge of the retaining ring protrudes radially inward to form a first key tooth, and the outer edge of the retaining ring protrudes radially outward to form a second key tooth. During installation, at least a portion of the first keyway of the bolt protrudes from the end face of the nut to cooperate with the retaining ring.

[0007] Preferably, the first key teeth, the second key teeth, the first key grooves and the second key grooves are each comprised of a plurality of circumferentially distributed ones.

[0008] Preferably, the center of the bolt has a central lightening hole.

[0009] Preferably, the first keyway is located at the edge of the central lightening hole of the bolt.

[0010] Preferably, the clamping ring comprises a plurality of models, and the angular positions of the adjacent first key teeth and the second key teeth of each model are different.

[0011] The advantages of the present application include: the present invention can effectively save the space for bolts and provide a location for positioning and installing other parts and equipment. In terms of cost, the present invention does not change the structural form of existing parts, reduces the use of cotter pins, adds processing of new clamping ring parts, gives new functions to traditional bolt connection forms, and facilitates the structural design of aircraft. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is the anti-loosening fastener connection diagram of this application retaining the bolt lightening hole;

[0013] Figure 2 This is a component diagram of the anti-loosening fastener parts for retaining bolt lightening holes in this application. DETAILED DESCRIPTION

[0014] In order to make the purpose, technical scheme and advantages of the implementation of this application clearer, the technical scheme in the implementation of this application will be described in more detail in combination with the drawings in the implementation of this application. In the drawings, the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The described implementation is a part of the implementation of this application, not all of the implementations. The implementation described below with reference to the drawings is exemplary and is intended to be used to explain this application, and cannot be understood as a limitation on this application. Based on the implementation in this application, all other implementations obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application. The implementation of this application is described in detail below in combination with the drawings.

[0015] like Figure 1-Figure 2 As shown, the present application provides an anti-loosening fastener with a retained bolt lightening hole, comprising a clamp ring 1, a nut 2, a fastened part 3, and a bolt 4, wherein:

[0016] The clamping ring 1 has a first key tooth 5 and a second key tooth 6; the bolt 4 has a first key groove 8, and the nut 2 has a second key groove 7; the bolt 4 passes through the fastened part 3 and is threadedly connected with the nut 2, the first key tooth 5 of the clamping ring 1 cooperates with the first key groove 8 to stop, and the second key tooth 6 cooperates with the second key groove 7 to stop.

[0017] Preferably, the end faces of the collar 1 and the nut 2 are provided with screw holes, and the collar 1 and the nut 2 are fastened and connected through the screw holes.

[0018] Preferably, the first keyway 8 is located at the outer edge of the bolt 4, the second keyway 7 is located at the outer edge of the nut 2, the inner edge of the retaining ring 1 radially protrudes inward to form a first key tooth 5, and the outer edge of the retaining ring 1 radially protrudes outward to form a second key tooth 6. During installation, at least a portion of the first keyway 8 of the bolt 4 protrudes from the end face of the nut 2 to cooperate with the retaining ring 1.

[0019] Preferably, the first key teeth 5, the second key teeth 6, the first key grooves 8 and the second key grooves 7 are each composed of a plurality of circumferentially distributed ones.

[0020] Preferably, the bolt 4 has a central lightening hole at its center.

[0021] In another embodiment, not shown in the drawings, the first keyway 8 is located at the edge of the central lightening hole of the bolt 4 .

[0022] Preferably, the clamping ring 1 includes multiple models, and the angular positions of adjacent first key teeth 5 and second key teeth 6 of each model are different.

[0023] When installing the structure, first install the fastened parts 3 and the bolts 4 in place, then tighten the nut 2, and then install the clamping ring 1, and insert the first key teeth 5 and the second key teeth 6 on the clamping ring 1 into the first key groove 8 and the second key groove 7 on the nut 2 and the bolt 4 respectively, and finally connect and fix the clamping ring 1 and the nut 2 together with screws.

[0024] During use, when the bolt 4 or nut 2 tends to rotate relative to each other due to the friction of the parts, the torque is transmitted to the nut 2 or bolt 4 through the clamp ring 1 to ensure that the movement state of the two is consistent, thereby achieving the purpose of preventing loosening. Figure 1 As shown, the connection parts of the clamp ring and the nut and bolt are all on the outer circumference, which does not occupy the space of the bolt lightening hole, ensuring the smoothness of the bolt lightening hole and can be used to install other parts or equipment.

[0025] To sum up, the core of the present invention is to connect the bolt and the nut by using a clamping ring to prevent relative rotation between the two and thus meet the anti-loosening requirements, without changing the structural form of existing parts, reducing the use of cotter pins, and adding the processing of new clamping ring parts, giving new functions to the traditional bolt connection form, and facilitating the structural design of the aircraft.

[0026] The advantages of the present application include: the present invention can effectively save the space for bolts and provide a location for positioning and installing other parts and equipment. In terms of cost, the present invention does not change the structural form of existing parts, reduces the use of cotter pins, adds processing of new clamping ring parts, gives new functions to traditional bolt connection forms, and facilitates the structural design of aircraft.

[0027] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. An anti-loosening fastener with a retaining bolt lightening hole, characterized in that: The invention comprises a clamping ring (1), a nut (2), a fastened part (3), and a bolt (4), wherein: The clamping ring (1) has a first key tooth (5) and a second key tooth (6); the bolt (4) has a first key groove (8), and the nut (2) has a second key groove (7); the bolt (4) passes through the fastened part (3) and is threadedly connected with the nut (2); the first key tooth (5) of the clamping ring (1) cooperates with the first key groove (8) to stop, and the second key tooth (6) cooperates with the second key groove (7) to stop.

2. The anti-loosening fastener with a bolt-retaining hole as claimed in claim 1, characterized in that: The end surfaces of the clamping ring (1) and the nut (2) are provided with screw holes, and the clamping ring (1) and the nut (2) are fastened and connected through the screw holes.

3. The anti-loosening fastener with a retaining bolt lightening hole as claimed in claim 1, characterized in that: The first keyway (8) is located on the outer edge of the bolt (4), the second keyway (7) is located on the outer edge of the nut (2), the inner edge of the clamping ring (1) protrudes radially inward to form a first key tooth (5), and the outer edge of the clamping ring (1) protrudes radially outward to form a second key tooth (6). During installation, at least a portion of the first keyway (8) of the bolt (4) protrudes from the end surface of the nut (2) to cooperate with the clamping ring (1).

4. The anti-loosening fastener with a retaining bolt lightening hole as claimed in claim 1, characterized in that: The first key teeth (5), the second key teeth (6), the first key grooves (8) and the second key grooves (7) all include a plurality of teeth distributed in the circumferential direction.

5. The anti-loosening fastener with a retaining bolt lightening hole as claimed in claim 1, characterized in that: The center of the bolt (4) is provided with a central weight-reducing hole.

6. The anti-loosening fastener with a retaining bolt lightening hole as claimed in claim 5, characterized in that: The first keyway (8) is located at the edge of the central lightening hole of the bolt (4).

7. The anti-loosening fastener with a retaining bolt lightening hole as claimed in claim 1, characterized in that: The clamping ring (1) includes multiple models, and the angular positions of adjacent first key teeth (5) and second key teeth (6) in each model are different.

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