CN109533276B

CN109533276B - Rotary type blade clamping device

Info

Publication number: CN109533276B
Application number: CN201811333279.XA
Authority: CN
Inventors: 徐龙起; 胡敦远; 王小明; 李永亮; 王海云; 颜亮; 孔波
Original assignee: China Helicopter Research and Development Institute
Current assignee: China Helicopter Research and Development Institute
Priority date: 2018-11-09
Filing date: 2018-11-09
Publication date: 2020-10-23
Anticipated expiration: 2038-11-09
Also published as: CN109533276A

Abstract

The application belongs to the technical field of aircraft connection structure, in particular to rotary type paddle clamping device. The device comprises: the upper clamping plate assembly, the lower clamping plate assembly, the universal joint, the supporting spring and the operating rod assembly. The upper clamping plate assembly comprises an upper clamping plate and a strip-shaped worm wheel, and the upper clamping plate is fixedly connected with the strip-shaped worm wheel; the lower clamping plate assembly comprises a lower clamping plate and a cover plate, the lower clamping plate is hinged with the upper clamping plate through a connecting assembly, the lower clamping plate is provided with an inner hole, the bottom of the inner hole is provided with an axial step, and the cover plate is arranged at the top of the inner hole of the lower clamping plate; the universal joint comprises an upper shaft joint and a lower shaft joint, the upper shaft joint is fixedly connected with the lower shaft joint and provided with a worm structure, the upper shaft joint is arranged in an inner hole of the lower clamping plate and is in fit connection with the strip-shaped worm wheel, and the lower shaft joint is arranged on the lower side of the lower clamping plate and is sleeved with a supporting spring; the operating rod assembly comprises an operating rod, and the operating rod is fixedly connected with the lower shaft joint. The clamping device can reliably clamp the paddle, and is simple in structure, convenient to operate and reliable in work.

Description

Rotary type blade clamping device

Technical Field

The application belongs to the technical field of helicopter connection structures, and particularly relates to a rotary type blade clamping device.

Background

When the helicopter is stored on a ship deck or in a hangar, the helicopter rotor wing needs to have a folding function in order to reduce the occupied space of the helicopter. When a ship sails on the sea, the ship is influenced by sea waves, and a large shaking phenomenon can occur, so that the helicopter blades shake.

After the paddle shakes, the paddle can collide with the engine body structure easily, and damage to the paddle and the engine body structure is caused. In order to avoid damage to the collision of the paddle and the engine body structure, the folded paddle needs to be clamped and fixed.

Accordingly, a technical solution is desired to overcome or at least alleviate at least one of the above-mentioned drawbacks of the prior art.

Disclosure of Invention

The object of the present application is to provide a rotary blade holding device to solve at least one problem existing in the prior art.

The technical scheme of the application is as follows:

a rotary blade holding apparatus comprising:

the upper clamping plate assembly comprises an upper clamping plate and a strip-shaped worm gear, and the upper clamping plate is fixedly connected with the strip-shaped worm gear;

the lower clamping plate assembly comprises a lower clamping plate and a cover plate, the lower clamping plate is hinged with the upper clamping plate through a connecting assembly, the lower clamping plate is provided with an inner hole, the bottom of the inner hole is provided with an axial step, and the cover plate is arranged at the top of the inner hole of the lower clamping plate;

the universal joint comprises an upper shaft joint and a lower shaft joint, the upper shaft joint is fixedly connected with the lower shaft joint, the upper shaft joint is provided with a worm structure, the upper shaft joint is arranged in an inner hole of the lower clamping plate and is in fit connection with the strip-shaped worm gear, and the lower shaft joint is arranged on the lower side of the lower clamping plate and is sleeved with a supporting spring;

a lever assembly including a lever secured to the lower boss.

Optionally, the upper clamping plate is fixedly connected with the bar-shaped worm gear through two first cylindrical pins.

Optionally, a gluing sleeve is sleeved on a joint surface of the upper clamping plate and the paddle; and a lower rubber sleeve is sleeved on the binding surface of the lower clamping plate and the paddle.

Optionally, the upper surface of the upper clamping plate and the lower surface of the lower clamping plate are both provided with reinforcing ribs.

Optionally, the connecting assembly includes a flat head shaft and a cotter pin, a double-lug structure is provided at one end of the upper clamp plate, and the lower clamp plate is hinged to the double-lug structure of the upper clamp plate through the flat head shaft in cooperation with the cotter pin.

Optionally, the connection assembly further comprises a washer for mating assembly of the flathead shaft and the cotter pin.

Optionally, one end of the lower clamping plate is provided with a groove communicated with the inner hole of the lower clamping plate, and the groove is used for accommodating the strip-shaped worm wheel.

Optionally, the cover plate is fixed on the top of the inner hole of the lower clamping plate through 5 countersunk head screws.

Optionally, the universal joint further includes a second cylindrical pin and a connecting block, and the upper shaft joint and the lower shaft joint are connected by the connecting block matching with the second cylindrical pin.

Optionally, the operating rod assembly further comprises a third cylindrical pin, and the operating rod is connected with the lower shaft joint through two third cylindrical pins.

The application has at least the following beneficial technical effects:

the utility model provides a rotation type paddle clamping device, when the paddle is folding fixed, hoist and mount, can press from both sides tight paddle reliably, have simple structure, the operation is convenient, characteristics such as reliable operation.

Drawings

FIG. 1 is a schematic view of a rotary blade holding apparatus according to one embodiment of the present application;

FIG. 2 is an exploded view of a rotary blade holding apparatus according to one embodiment of the present application;

FIG. 3 is a schematic view of a worm gear in the form of a bar of a rotary paddle holding device according to an embodiment of the present application;

FIG. 4 is an assembly view of a gimbal and lower clamp plate assembly of a rotary blade gripping device according to an embodiment of the present application;

FIG. 5 is an operational view of a rotary blade holding apparatus according to an embodiment of the present application;

fig. 6 is a schematic diagram of the operation of a rotary blade holding apparatus according to an embodiment of the present application.

Wherein:

10-an upper cleat assembly; 11-an upper splint; 12-gluing a rubber sleeve; 13-a bar worm gear; 14-a first cylindrical pin; 20-a lower cleat assembly; 21-countersunk head screw; 22-a cover plate; 23-arranging a rubber sleeve; 24-lower splint; 30-a universal joint; 31-upper coupling; 32-a second cylindrical pin; 33-lower coupling; 34-a connecting block; 40-a support spring; 50-a lever assembly; 51-a third cylindrical pin; 52-a joystick; 60-a connecting assembly; 61-plain head axis; 62-a gasket; 63-cotter pin; 70-body structure; 71-a paddle; 72-an auxiliary rod; 73-Cross bar.

Detailed Description

In order to make the implementation objects, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be described in more detail below with reference to the drawings in the embodiments of the present application. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are a subset of the embodiments in the present application and not all embodiments in the present application. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present application and should not be construed as limiting the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application. Embodiments of the present application will be described in detail below with reference to the accompanying drawings.

In the description of the present application, it is to be understood that the terms "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience in describing the present application and for simplifying the description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore should not be construed as limiting the scope of the present application.

The present application is described in further detail below with reference to fig. 1 to 6.

The present application provides a rotary paddle clamping device, as shown in fig. 1, comprising: an upper clamp assembly 10, a lower clamp assembly 20, a universal joint 30, a support spring 40, and a lever assembly 50.

Specifically, as shown in fig. 2, the upper clamp assembly 10 includes an upper clamp 11 and a worm bar 13, and the upper clamp 11 is fixedly connected to the worm bar 13. In one embodiment of the present application, the upper clamping plate 11 is fixedly connected to the bar worm gear 13 by two first cylindrical pins 14.

The lower clamping plate assembly 20 comprises a lower clamping plate 24 and a cover plate 22, the lower clamping plate 24 is hinged with the upper clamping plate 11 through a connecting assembly 60, an inner hole is formed in the lower clamping plate 24, an axial step is arranged at the bottom of the inner hole, and the cover plate 22 is arranged at the top of the inner hole of the lower clamping plate 24. In one embodiment of the present application, the connecting assembly 60 includes a flat head shaft 61, a washer 62 and a cotter pin 63, one end of the lower side of the upper clamping plate 11 is provided with a double-lug structure, and the lower clamping plate 24 is hinged with the double-lug structure of the upper clamping plate 11 through the flat head shaft 61 matching with the washer 62 and the cotter pin 63, so that the lower clamping plate 24 is mounted with the upper clamping plate 11. One end of the lower clamping plate 24 is provided with a groove communicated with the inner hole of the lower clamping plate 24, and the groove is used for accommodating the strip-shaped worm wheel 13. The cover plate 22 is fixed on the top of the inner hole of the lower clamping plate 24 through 5 countersunk head screws 21.

Further, the worm bar 13 of the present embodiment is connected to the extended connecting portion of the two-ear structure of the upper plate 11. As shown in fig. 3, the worm bar 13 is a part of a circular worm wheel, the right end of the worm bar is arc-shaped, the center of the circular worm wheel is located on the axis of the flat head shaft 61, and when the upper clamp 11 rotates around the axis of the flat head shaft 61, the motion track of the right end of the worm bar 13 is arc-shaped.

Advantageously, in the present embodiment, the gluing surface of the upper clamping plate 11 and the paddle 71 is sleeved with the gluing sleeve 12; the lower rubber sleeve 23 is sleeved on the binding surface of the lower clamping plate 24 and the paddle 71. The clamping plate and the rubber sleeve are assembled by adopting a vulcanization molding process, and the rubber sleeve can effectively prevent the clamping plate from directly contacting the paddle 71, so that the paddle 71 is prevented from being damaged.

Advantageously, in this embodiment, the upper surface of the upper clamping plate 11 and the lower surface of the lower clamping plate 24 are provided with reinforcing ribs.

The universal joint 30 comprises an upper shaft joint 31 and a lower shaft joint 33, the upper shaft joint 31 is fixedly connected with the lower shaft joint 33, the upper shaft joint 31 is provided with a worm structure, the upper shaft joint 31 is limited in an inner hole of the lower clamping plate 24 through an axial step at the bottom of the inner hole of the lower clamping plate 24 and is in fit connection with the strip-shaped worm wheel 13, the lower shaft joint 33 is arranged on the lower side of the lower clamping plate 24, in the embodiment, the universal joint 30 further comprises a second cylindrical pin 32 and a connecting block 34, and the upper shaft joint 31 and the lower shaft joint 33 are in fit connection with the second cylindrical pin 32 through the connecting block 34. In addition, the lower coupling 33 is sleeved with a support spring 40.

As shown in fig. 4, after the universal joint 30 is assembled, the universal joint passes through the lower rubber sleeve 23 and the lower clamping plate 24 from top to bottom, and after the upper shaft joint 31 is matched with the bottom surface of the inner hole of the lower clamping plate 24, the cover plate 22 is connected with the lower clamping plate 24 through 5 countersunk head screws 21, so that the assembly of the universal joint 30 and the lower clamping plate assembly 20 is completed. After the universal joint 30 is assembled, the lower shaft joint 33 can be pivoted in any plane passing through the axis of the upper shaft joint 31, so that the upper and

lower clamp assemblies

10 and 20 can be pivoted arbitrarily relative to the joystick assembly 50.

The lever assembly 50 comprises a lever 52, the lever 52 being secured to the lower hub 33 by two third cylindrical pins 51.

In this embodiment, the dimension between the lower clamp assembly 20 and the operating rod 52 is smaller than the free height of the support spring 40, thereby placing the support spring 40 in a compressed state. The support spring 40 provides a support force for the lower clamp assembly 20, so that the lower clamp assembly 20 and the upper clamp assembly 10 are in a balanced state relative to the operating lever assembly 50, and an operator can clamp or release the paddle 71 by holding the operating lever assembly 50 by hand.

As shown in fig. 5, the rotary blade holding apparatus of the present application is mounted to the body structure 70 by the auxiliary bar 72 and the cross bar 73. The universal joint 30 is driven to rotate by rotating the operating rod 52, the upper shaft joint 31 is in a worm structure, and the strip-shaped worm wheel 13 is driven to move up and down by taking the central line of the flat head shaft 61 as an axis, namely, the upper clamping plate assembly 10 rotates up and down around the flat head shaft 61, so that the opening and closing of the clamping device of the paddle 71 are realized. The combination of the strip-shaped worm wheel 13 and the upper shaft coupling 31 forms a worm and gear mechanism, which has a self-locking function, and the opening and closing of the upper clamping plate assembly 10 and the lower clamping plate assembly 20 can be realized only by rotating the operating rod assembly 50, so that the operation is reliable.

In summary, the rotary blade clamping device of the present application prevents the upper clamp plate 11 and the lower clamp plate 24 from directly contacting the blade 71 by providing the upper rubber sleeve 12 and the lower rubber sleeve 23, thereby avoiding damage to the blade 71; the universal joint 30 can enable the operating rod assembly 50 to deflect freely relative to the upper clamping plate assembly 10 and the lower clamping plate assembly 20, and the operating range of the operating rod assembly 50 is expanded; the upper shaft coupling 31 and the strip-shaped worm wheel 13 form a worm and gear mechanism, the worm and gear mechanism has a self-locking function, the opening and closing of the upper clamping plate assembly 10 and the lower clamping plate assembly 20 can be realized only by rotating the operating rod assembly 50, and the reliability is improved; the support springs 40 balance the upper and

lower clamp assemblies

10, 20 relative to the lever assembly 50, allowing for ease of operation of the lever assembly 50 in controlling the opening and closing of the upper and

lower clamp assemblies

10, 20.

The utility model provides a rotation type paddle clamping device can carry out the centre gripping to the paddle fast reliably, can be used to work such as the fixed of paddle after the paddle is folded, the hoist and mount of paddle, and the mechanism is simple and practical, convenient operation.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present application should be covered within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A rotary paddle clamping device, comprising:

the upper clamping plate assembly (10) comprises an upper clamping plate (11) and a strip-shaped worm wheel (13), and the upper clamping plate (11) is fixedly connected with the strip-shaped worm wheel (13);

the lower clamping plate assembly (20) comprises a lower clamping plate (24) and a cover plate (22), the lower clamping plate (24) is hinged to the upper clamping plate (11) through a connecting assembly (60), an inner hole is formed in the lower clamping plate (24), an axial step is arranged at the bottom of the inner hole, and the cover plate (22) is arranged at the top of the inner hole of the lower clamping plate (24);

the universal joint (30) comprises an upper shaft joint (31) and a lower shaft joint (33), the upper shaft joint (31) is fixedly connected with the lower shaft joint (33), the upper shaft joint (31) is provided with a worm structure, the upper shaft joint (31) is arranged in an inner hole of the lower clamping plate (24) and is in fit connection with the strip-shaped worm wheel (13), and the lower shaft joint (33) is arranged on the lower side of the lower clamping plate (24) and is sleeved with a supporting spring (40);

a lever assembly (50), the lever assembly (50) including a lever (52), the lever (52) being secured to the lower hub (33).

2. Rotary blade clamping device according to claim 1, characterised in that the upper clamping plate (11) is secured to the bar worm gear (13) by means of two first cylindrical pins (14).

3. A rotary blade holding device according to claim 1 wherein the abutment surface of the upper clamping plate (11) against the blade (71) is provided with a sizing sleeve (12); the binding surface of the lower clamping plate (24) and the paddle (71) is sleeved with a lower rubber sleeve (23).

4. A rotary blade holding arrangement according to claim 1, wherein the upper surface of the upper clamping plate (11) and the lower surface of the lower clamping plate (24) are provided with stiffening ribs.

5. A rotary blade clamp assembly according to claim 1, wherein the attachment assembly (60) includes a stub shaft (61) and a cotter pin (63), the upper clamp plate (11) being provided with a binaural configuration at one end, the lower clamp plate (24) being hinged to the binaural configuration of the upper clamp plate (11) by the stub shaft (61) engaging the cotter pin (63).

6. The rotary blade clamp according to claim 5, wherein the connection assembly (60) further comprises a washer (62), the washer (62) being adapted to fit the assembly of the clevis shaft (61) and the cotter pin (63).

7. The rotary blade holding device according to claim 1, wherein one end of the lower clamping plate (24) is provided with a groove which is communicated with the inner hole of the lower clamping plate (24), and the groove is used for accommodating the strip-shaped worm wheel (13).

8. A rotary blade holding device according to claim 1, wherein the cover plate (22) is secured to the top of the internal bore of the lower clamping plate (24) by 5 countersunk screws (21).

9. Rotary blade holding device according to claim 1, wherein the universal joint (30) further comprises a second cylindrical pin (32) and a connecting block (34), the upper (31) and lower (33) joints being connected by the connecting block (34) engaging the second cylindrical pin (32).

10. A rotary blade holding device according to claim 1, wherein the lever assembly (50) further comprises third cylindrical pins (51), the lever (52) being connected to the lower hub (33) by two of the third cylindrical pins (51).