Folding hinge suitable for curved surface

Abstract

The utility model relates to the technical field of hinges, and provides a folding hinge suitable for a curved surface, which is applied to a fixed part and a folding part which are abutted against each other, and comprises a translation angle sheet, a limiting chute is arranged on the fixed part, and the translation angle sheet is arranged in the limiting chute and can slide along the direction of a connecting line of the fixed part and the folding part; the limiting sliding groove provides guidance for sliding of the translation angle piece and limits the translation angle piece from sliding out of the fixing piece. The folding piece is provided with a mounting groove, and the folding corner piece is fixedly connected into the mounting groove; the translation angle piece is provided with a first connecting part, the folding angle piece is provided with a second connecting part, and the first connecting part and the second connecting part are connected through the rotating shaft. According to the utility model, the whole body formed by the translation angle piece, the folding angle piece and the folding piece translates for a certain distance towards the direction far away from the fixing piece, so that a gap is reserved between the folding piece and the fixing piece, the folding piece and the fixing piece can rotate relatively, and the technical problems that the mechanism cannot rotate and the structure is interfered as the rotating shaft is positioned in the machine body are well solved.

Description

Technical Field

[0001] The utility model relates to the technical field of hinges, and in particular to a folding hinge suitable for curved surfaces. Background Art

[0002] Hinges are a common structural form and are extremely common in wind tunnel model structural design. For example, movable control surfaces such as rudders, elevators, flaps, and ailerons are all controlled by hinges. However, in some special cases, some functions that can be achieved by real aircraft cannot be simulated in the real structure for wind tunnel model design after being reduced in scale. In this case, the structure needs to be redesigned to complete its original function. For example, when the shaft is located inside the fuselage, the rotation function cannot be achieved. At this time, in order to demonstrate this activity detail and study the aerodynamic characteristics of the folding mechanism, it is necessary to design and manufacture corresponding wind tunnel test models for wind blowing tests to study the aircraft folding structure in different states such as flattened and folded. Therefore, how to provide a shaft located inside the fuselage to avoid the mechanism being unable to rotate and structural interference is an urgent problem to be solved. Utility Model Content

[0003] The purpose of the utility model is to provide a folding hinge suitable for curved surfaces, so as to solve the technical problems that the mechanism cannot rotate and structural interference occurs due to the shaft being located inside the body.

[0004] The utility model is achieved through the following technical solutions:

[0005] A folding hinge suitable for curved surfaces, applied to a fixed part and a folding part abutting each other, comprising:

[0006] The translation angle piece and the fixing piece are provided with a limiting slide groove. The translation angle piece is arranged in the limiting slide groove and can slide along the direction of the connecting line between the fixing piece and the folding piece. The limiting slide groove provides a guide for the translation angle piece and limits the translation angle piece from slipping off the fixing piece.

[0007] A folding corner piece, wherein the folding piece is provided with a mounting groove, and the folding corner piece is fixedly connected to the mounting groove; and

[0008] The rotating shaft is provided with a first connecting portion on the translation angle piece and a second connecting portion on the folding angle piece, and the first connecting portion and the second connecting portion are connected through the rotating shaft.

[0009] Optionally, the first connecting portion is provided with a folding limiting surface, and the second connecting portion is provided with a locking surface, and when the locking surface contacts the folding limiting surface, the folding angle of the folding member relative to the fixing member is limited.

[0010] Optionally, the first connecting portion is further provided with a flattening limit surface, and when the locking surface contacts the flattening limit surface, the flattening angle of the folding member relative to the fixing member is limited.

[0011] Optionally, the limiting sliding groove is connected to a first cover plate through fasteners for closing it and maintaining the integrity of the fixed part profile; the mounting groove is connected to a second cover plate through fasteners for closing it and maintaining the integrity of the folding part profile.

[0012] Optionally, the translational corner piece is provided with a C-shaped area near the first connecting portion to avoid a folding track of the folding piece.

[0013] The technical solution of this utility model has at least the following advantages and beneficial effects: in the utility model, the translation angle piece and the folding angle piece are connected by a rotating shaft, the translation angle piece is slidably set in the limiting slide groove on the fixed part, and the folding angle piece is fixedly connected to the folding part. In this way, the whole composed of the translation angle piece, the folding angle piece and the folding part can slide along the limiting slide groove, and the whole can be translated a certain distance away from the fixed part, so that a gap is left between the folding part and the fixed part, so that the folding part can rotate relative to the fixed part, which solves the technical problem that the rotating shaft is located inside the machine body, causing the mechanism to be unable to rotate and structural interference. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0015] Figure 1 A diagram of a folding hinge suitable for a curved surface provided by the utility model in a flattened state;

[0016] Figure 2 An exploded view of a folding hinge suitable for curved surfaces provided by the utility model in a flattened state;

[0017] Figure 3 This is a partial enlarged view of the state of the translation corner piece, folding corner piece and folding member after the entire translation;

[0018] Figure 4 Schematic diagram of the structure of the translation angle piece;

[0019] Figure 5 Schematic diagram of the structure of the folded corner piece;

[0020] Figure 6 The locking principle diagram of the locking surface in the flattened state;

[0021] Figure 7 The locking principle diagram of the locking surface in the folded state;

[0022] Icon: 1-fixing part, 101-limiting slide, 2-folding part, 201-installing slot, 3-translational angle piece, 301-folding limiting surface, 302-flattening limiting surface, 303-C-type area, 4-folding angle piece, 401-locking surface, 5-rotating shaft, 6-first cover plate, 7-second cover plate. DETAILED DESCRIPTION

[0023] refer to Figure 1-Figure 5 A folding hinge suitable for curved surfaces includes a translation angle piece 3, a folding angle piece 4, and a rotating shaft 5. The fixed part 1 and the folding part 2 that abut against each other can be various aircraft models with folding structures, such as missiles and aircraft.

[0024] The translational corner piece 3 is provided with a first connection portion, and the folding corner piece 4 is provided with a second connection portion. The first connection portion and the second connection portion are connected by a rotating shaft 5, so that the folding corner piece 4 can translate and rotate relative to each other around the rotating shaft 5. The folding member 2 is provided with a mounting groove 201, and the folding corner piece 4 is fixedly connected to the mounting groove 201. The fixing member 1 is provided with a limiting slide 101. The translational corner piece 3 is arranged in the limiting slide 101 and can slide along the direction of the line connecting the fixing member 1 and the folding member 2. The width of the translational corner piece 3 is the same as the width of the limiting slide 101. The limiting slide 101 provides a guide for the sliding of the translational corner piece 3. At the same time, a stop is provided at one end of the limiting slide 101 close to the folding member 2 to limit the translational corner piece 3 from sliding out of the limiting slide 101.

[0025] On the basis of the above, the whole composed of the translation angle piece 3, the folding angle piece 4 and the folding part 2 can slide along the limiting slide groove 101, and the whole can translate a certain distance in the direction away from the fixed part 1, so that a gap is left between the folding part 2 and the fixed part 1, so that the folding part 2 can rotate relative to the fixed part 1, which effectively solves the technical problem that the rotating shaft 5 is located inside the machine body, causing the mechanism to be unable to rotate and structural interference.

[0026] The translational corner piece 3 has a C-shaped area 303 near the first connection portion to avoid the folding trajectory of the folding member 2. It is easy to understand that in other embodiments, if the folding member 2 needs to rotate at a small angle, the C-shaped area 303 can of course be omitted without interference.

[0027] In this embodiment, the fixed member 1 and the folding member 2 are aircraft models. On this basis, a first cover plate 6 is connected to the limiting chute 101 via fasteners (e.g., screws). The first cover plate 6 closes the limiting chute 101, maintaining the integrity of the fixed member 1's profile while confining the translation angle piece 3 within the limiting chute 101. A second cover plate 7 is connected to the mounting slot 201 via fasteners (e.g., screws). When the fasteners are connected to the second cover plate 7, the folding angle piece 4 is simultaneously fixed. The second cover plate 7 closes the mounting slot 201, maintaining the integrity of the folding member 2's profile. It is easy to understand that if the application does not require the integrity of the profile, the first cover plate 6 and the second cover plate 7 can of course be omitted.

[0028] In this embodiment, the first connection portion is provided with a folding limit surface 301, and the second connection portion is provided with a locking surface 401. When the folding member 2 rotates relative to the fixed member 1 to fold, the locking surface 401 contacts the folding limit surface 301, thereby limiting the folding angle of the folding member 2 relative to the fixed member 1. Furthermore, the first connection portion is also provided with a flattening limit surface 302. Similarly, when the folding member 2 is flattened from a folded state, the locking surface 401 contacts the flattening limit surface 302, thereby limiting the flattening angle of the folding member 2 relative to the fixed member 1.

[0029] It can be seen that the folding hinge provided by the utility model can realize angular positioning in the folded state and the flattened state, can quickly and simply change the state during model testing and display, is simple to operate, and has high positioning accuracy.

[0030] For the convenience of description, the contact surface between the locking surface 401 and the flattening limit surface 302 is defined as the flattening contact surface, and the contact surface between the locking surface 401 and the folding limit surface 301 is defined as the folding contact surface. Figure 6 When the locking surface 401 contacts the flattening limit surface 302 (i.e., in a completely flattened state), the distance OS1 from the axis O of the shaft 5 to any contact point S1 on the flattening contact surface should be greater than the distance OH from the axis O of the shaft 5 to the vertical point H of the locking surface 401, i.e., OS1>OH. Similarly, referring to Figure 7 When the locking surface 401 contacts the folding limit surface 301 (that is, when it is in a fully folded state), the distance OS2 from the axis O of the rotating shaft 5 to any contact point S2 on the folding contact surface should also be greater than the distance OH from the axis O of the rotating shaft 5 to the vertical point H of the locking surface 401, that is, OS2>OH; that is, draw a circle with OH, and any contact point S1 on the flattened contact surface is outside the circle, and any contact point S2 on the folded contact surface is also outside the circle. In this way, it is ensured that there will be no interference when the folding corner piece 4 rotates in two directions.

[0031] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A folding hinge suitable for curved surfaces, used for mutually abutting fixed parts and folding parts, characterized in that: include: The translation angle piece and the fixing piece are provided with a limiting slide groove. The translation angle piece is arranged in the limiting slide groove and can slide along the direction of the connecting line between the fixing piece and the folding piece. The limiting slide groove provides a guide for the translation angle piece and limits the translation angle piece from slipping off the fixing piece. A folding corner piece, wherein the folding piece is provided with a mounting groove, and the folding corner piece is fixedly connected to the mounting groove; and The rotating shaft is provided with a first connecting portion on the translation angle piece and a second connecting portion on the folding angle piece, and the first connecting portion and the second connecting portion are connected through the rotating shaft.

2. The folding hinge suitable for curved surfaces according to claim 1, characterized in that: The first connecting portion is provided with a folding limiting surface, and the second connecting portion is provided with a locking surface. When the locking surface contacts the folding limiting surface, the folding angle of the folding member relative to the fixing member is limited.

3. The folding hinge suitable for curved surfaces according to claim 2, characterized in that: The first connecting portion is further provided with a flattening limit surface, and when the locking surface contacts the flattening limit surface, the flattening angle of the folding member relative to the fixing member is limited.

4. The folding hinge suitable for curved surfaces according to any one of claims 1 to 3, characterized in that: The limiting sliding groove is connected to a first cover plate through a fastener for closing it and maintaining the integrity of the fixed part surface; the mounting groove is connected to a second cover plate through a fastener for closing it and maintaining the integrity of the folding part surface.

5. The folding hinge suitable for curved surfaces according to any one of claims 1 to 3, characterized in that: The translational corner piece is provided with a C-shaped area near the first connecting portion to avoid the folding track of the folding member.

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