Torsion anti-impact damping mechanism and system

Abstract

The invention provides a torsion anti-impact damping mechanism and system, and belongs to the technical field of helicopter structural design, in the mechanism, semicircular grooves are evenly distributed in the outer edge of an anti-torsion supporting piece, and semicircular grooves are evenly distributed in the corresponding positions of the inner edge of a gear; a semicircular groove in the outer edge of the anti-torsion supporting piece and a semicircular groove in the inner edge of the gear form a complete circle, and an elastic element is placed in the complete circle; a wear-resistant sheet is glued between the semicircular grooves in the outer side of the anti-torsion supporting piece; when the motor rotates to drive the anti-torsion supporting piece to rotate, the anti-torsion supporting piece transmits torque to the elastic element in the semicircular groove of the anti-torsion supporting piece, the elastic element deforms, the semicircular groove in the gear transmits load to the gear, the lower check block and the upper check block limit the gear to move up and down, and the gear transmits the load to a mechanism to be driven. According to the invention, stable transmission of load and motion can be realized in an impact vibration environment, the device can be used on rotary driving products such as a rotary retractable hanger of a helicopter, the impact load is reduced, a driving mechanism can be protected, and opening and closing can be realized.

Description

Technical Field

[0001] The present invention belongs to the technical field of helicopter structure design, and particularly relates to a torsional impact and vibration damping mechanism and system. Background Art

[0002] When the helicopter rotary drive starts and encounters a limit stop, additional impact loads will be generated, which will increase the additional load and cause damage to the drive mechanism.

[0003] The commonly used solution is to adjust the acceleration during start-up and stop through the control system to reduce the impact, but there are many limiting factors in the adjustment of the control system, and a satisfactory effect cannot be achieved. Especially when there are sudden changes in load during the rotation process, in order to further reduce the impact, elastic elements are generally added at the limit position for unloading, but unloading cannot be performed during start-up. Summary of the Invention

[0004] In order to solve the problem that the prior art cannot perform unloading during start-up, the present invention provides a torsional impact and vibration damping mechanism and system, which has a simple and reliable structure and can enable the system to achieve the ability of anti-impact and vibration during the entire rotation process. The technical solutions are as follows:

[0005] In the first aspect, a torsional impact and vibration damping mechanism is provided, including: motor 1, lower block 2, gear 3, elastic element 4, wear-resistant sheet 5, anti-torsion support 6, upper block 7, and gasket 8.

[0006] The lower block 2, anti-torsion support 6, upper block 7, and gasket 8 are sequentially installed on the shaft of the motor 1 and tightened and fixed by fasteners. The anti-rotation plane on the shaft of the motor 1 ensures that the lower block 2, anti-torsion support 6, upper block 7, gasket 8, and the shaft of the motor 1 rotate together.

[0007] The gear 3 is sleeved outside the anti-torsion support 6 and is limited up and down by the lower block 2 and the upper block 7; semi-circular grooves are evenly distributed on the outer edge of the anti-torsion support 6, and semi-circular grooves are evenly distributed at corresponding positions on the inner edge of the gear 3; the semi-circular grooves on the outer edge of the anti-torsion support 6 and the semi-circular grooves on the inner edge of the gear 3 form a complete circle, and the elastic element 4 is placed inside.

[0008] The wear-resistant sheet 5 is cemented between the outer semi-circular grooves of the anti-torsion support 6, and the outer surface of the wear-resistant sheet 5 contacts the inner surface of the gear 3.

[0009] When the motor 1 rotates, it drives the anti-torsion support 6 to rotate. The anti-torsion support 6 transmits the torque to the elastic element 4 in its semi-circular groove, and the elastic element 4 deforms. The semi-circular groove on the gear 3 transmits the load to the gear 3. The lower block 2 and the upper block 7 limit the up and down movement of the gear 3, and the gear 3 transmits the load to the mechanism to be driven.

[0010] Among them, a fillet R1 is chamfered at the sharp edge of the semi-circular groove on the inner edge of the gear 3, a fillet R2 is chamfered at the sharp edge of the edge groove on the outer edge of the anti-torsion support member 6, and the edge T1 of the wear-resistant sheet 5 does not exceed the fillets R1 and R2; the cavity formed by the fillet R1 of the gear 3, the edge T1 of the wear-resistant sheet 5, the fillet R2 of the anti-torsion support member 6, and the edge T2 of the elastic element 4 serves as the space for the elastic element 4 to deform under force.

[0011] Optionally, the elastic elements 4 are arranged at equal intervals, with a minimum of 3 to ensure relatively uniform force application; and a maximum of 10 to avoid the individual size of the wear-resistant sheet 5 being too small and affecting force transmission.

[0012] Among them, the radius R3 of the elastic element 4 and the radius R4 of the anti-torsion support member 6 satisfy:

[0013] 0.2R4 ≤ R3×n ≤ R4,

[0014] where: n is the number of elastic elements.

[0015] The design that meets this requirement can make the most of the structural space and avoid waste of space caused by size mismatches between elastic elements or anti-torsion support members.

[0016] To further utilize the structural space, R1 ≥ R2 is satisfied.

[0017] To ensure that the elastic element has sufficient restraint in the semi-circular groove under force, R1 ≤ 0.2R3; to ensure that the elastic element will not be shear-damaged under force, R2 ≥ 0.1R3.

[0018] Optionally, the materials of the lower stop block 2 and the upper stop block 7 are wear-resistant composite materials.

[0019] In a second aspect, a torsional anti-shock and vibration damping system is provided, including: the torsional anti-shock and vibration damping mechanism according to any one of the first aspects, and a mechanism to be driven,

[0020] The mechanism to be driven is connected to the gear 3 in the torsional anti-shock and vibration damping mechanism.

[0021] The beneficial effects of the present invention are at least as follows:

[0022] It realizes the smooth transmission of load and motion in an impact and vibration environment, can be used in products with rotational drive such as the rotary retractable hanger of a helicopter, reduces the impact load, can protect the drive mechanism and realizes opening and closing. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the torsional anti-shock and vibration damping mechanism of the present invention;

[0024] Figure 2 It is a composition diagram of the torsional anti-shock and vibration damping mechanism of the present invention;

[0025] Figure 3 Schematic diagram of the arrangement of the elastic element of the present invention;

[0026] Figure 4 Schematic diagram of the deformation space of the elastic element of the present invention. Detailed implementation manners

[0027] In order to make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0028] The features and illustrative embodiments of various aspects of the present invention will be described in detail below. In the following detailed description, many specific details are set forth in order to provide a thorough understanding of the present invention. However, it is obvious to those skilled in the art that the present invention can be practiced without some of these specific details. The following description of the embodiments is only intended to provide a better understanding of the present invention by showing examples of the present invention. The present invention is in no way limited to any specific arrangement and method set forth below, but covers any improvement, replacement, and modification of structures, methods, and devices without departing from the spirit of the present invention. Well-known structures and technologies are not shown in the drawings and the following description to avoid unnecessarily obscuring the present invention.

[0029] It should be noted that, without conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other, and the various embodiments may refer to and cite each other.

[0030] The present invention will be described in detail below with reference to the accompanying drawings and specific implementation manners.

[0031] Refer to Figure 1 and Figure 2 , an embodiment of the present invention provides a torsional anti-impact damping mechanism, which has a simple structure and strong designability, and can be used alone as an anti-impact solution or added to an existing damping solution to improve the anti-impact ability of the entire system during rotation, so as to further enhance its anti-impact effect.

[0032] The torsional anti-impact damping mechanism is as shown in Figure 1 . This mechanism consists of a motor 1, a lower block 2, a gear 3, an elastic element 4, a wear-resistant sheet 5, a torsional support member 6, an upper block 7, a gasket 8, and a bolt 9.

[0033] The lower stop block 1, the torsion-resistant support member 6, the upper stop block 7 and the gasket 8 are successively mounted on the shaft of the motor 1 and tightened and fixed by bolts 9. The anti-rotation plane on the motor shaft ensures that the lower stop block, the torsion-resistant support member, the upper stop block, the gasket and the motor shaft rotate together.

[0034] The gear 3 is sleeved outside the torsion-resistant support member 6 and is limited by the lower stop block 1 and the upper stop block 7 up and down. Semi-circular grooves are evenly distributed on the outer edge of the torsion-resistant support member, and semi-circular grooves are evenly distributed at corresponding positions on the inner edge of the gear; the semi-circular grooves on the outer edge of the torsion-resistant support member and the semi-circular grooves on the inner edge of the gear form a complete circle, and an elastic element 4 is placed inside, see Figure 3 .

[0035] The materials of the lower stop block 2 and the upper stop block 7 are wear-resistant composite materials.

[0036] A wear-resistant piece 5 is cemented between the outer semi-circular grooves of the torsion-resistant support member, and the outer surface of the wear-resistant piece contacts the inner surface of the gear.

[0037] The sharp edges of the semi-circular grooves on the inner edge of the gear are chamfered with a fillet R1, and the sharp edges of the corresponding semi-circular grooves on the outer edge of the torsion-resistant support member are also chamfered with a fillet R2. The edge T of the wear-resistant piece cannot exceed the fillets R1 and R2; the cavity formed by the gear fillet R1, the wear-resistant piece edge T1, the torsion-resistant support member fillet R2 and the edge T2 of the elastic element is used as the space for the shear deformation of the elastic element under force, see Figure 4 .

[0038] When the motor rotates, it drives the torsion-resistant support member to rotate. The torsion-resistant support member transmits the torque to the elastic element in the semi-circular groove. Through the shear deformation of the elastic element, the load is transmitted to the gear through the semi-circular groove on the gear, and then transmitted to the product to be driven through the gear.

[0039] The elastic elements (semi-circular grooves) are arranged at equal intervals, and the minimum number of them is 3 to ensure relatively uniform force; the maximum number of them is 10 to avoid too small individual size of the wear-resistant piece, which affects the force transmission.

[0040] In an embodiment, the relationship between the radius R3 of the elastic element and the radius R4 of the torsion-resistant support member needs to satisfy:

[0041] 0.2R4 ≤ R3×n ≤ R4

[0042] Where: n is the number of elastic elements.

[0043] The design that meets this requirement can make the most of the structural space, avoid waste of space caused by size mismatch between elastic elements or torsion-resistant support members, and to further utilize the structural space, ensure that R1 ≥ R2.

[0044] To ensure that the elastic element has sufficient restraint in the semi-circular groove under force, R1 ≤ 0.2R3; to ensure that the elastic element will not be shear-damaged under force, R2 ≥ 0.1R3.

[0045] The present invention designs a torsional anti-impact and vibration damping mechanism with anti-impact and vibration damping functions. By adjusting the stiffness of the elastic element and the quantity and size of the elastic element, different usage environments can be matched to achieve the best anti-impact and vibration damping effects.

[0046] An embodiment of the present invention further provides a torsional anti-impact and vibration damping system, including: the torsional anti-impact and vibration damping mechanism described in the embodiment of the present invention, and a mechanism to be driven, where the mechanism to be driven is connected to gear 3 in the torsional anti-impact and vibration damping mechanism.

[0047] The torsional anti-impact and vibration damping mechanism provided by the embodiment of the present invention realizes the smooth transmission of load and motion in an impact and vibration environment, can be used in products with rotational drive such as the rotary retractable hanger of a helicopter, reduces the impact load, can protect the drive mechanism and realize opening and closing.

[0048] The above only expresses the implementation manners of the present invention, and the description is relatively specific and detailed, but it cannot be understood as a limitation on the scope of the patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention. In addition, the parts not detailed in the present invention are all conventional techniques.

Claims

1. A torsional shock-absorbing and vibration-damping mechanism, characterized in that Comprising: a motor, a lower stop block, a gear, an elastic element, a wear-resistant sheet, a torsion-resistant support member, an upper stop block, and a gasket The lower stop block, the torsion-resistant support member, the upper stop block, and the gasket are sequentially installed on the shaft of the motor and tightened and fixed by fasteners. The anti-rotation plane on the shaft of the motor ensures that the lower stop block, the torsion-resistant support member, the upper stop block, the gasket, and the shaft of the motor rotate together; The gear is sleeved outside the torsion-resistant support member and is limited by the lower stop block and the upper stop block up and down; semi-circular grooves are evenly distributed on the outer edge of the torsion-resistant support member, and semi-circular grooves are evenly distributed at corresponding positions on the inner edge of the gear; the semi-circular grooves on the outer edge of the torsion-resistant support member and the semi-circular grooves on the inner edge of the gear form a complete circle, and an elastic element is placed inside; A wear-resistant sheet is cemented between the outer semi-circular grooves of the torsion-resistant support member, and the outer surface of the wear-resistant sheet contacts the inner surface of the gear; When the motor rotates, it drives the torsion-resistant support member to rotate. The torsion-resistant support member transmits the torque to the elastic element in its semi-circular groove, and the elastic element deforms. The semi-circular groove on the gear transmits the load to the gear. The lower stop block and the upper stop block limit the up and down movement of the gear, and the gear transmits the load to the mechanism to be driven.

2. The torsion anti-shock and vibration damping mechanism according to claim 1, characterized in that Round corners R1 are chamfered at the sharp edges of the semi-circular grooves on the inner edge of the gear, round corners R2 are chamfered at the sharp edges of the edge grooves on the outer edge of the torsion-resistant support member, and the edge T1 of the wear-resistant sheet does not exceed the round corners R1 and R2; the cavity formed by the round corner R1 of the gear, the edge T1 of the wear-resistant sheet, the round corner R2 of the torsion-resistant support member, and the edge T2 of the elastic element serves as the space for the elastic element to be deformed by force.

3. The anti-torsion shock-absorbing mechanism according to claim 2, wherein The elastic elements are arranged at equal intervals, with at least 3 and at most 10.

4. The anti-torsion impact damping mechanism according to claim 1, characterized in that The radius R3 of the elastic element and the radius R4 of the torsion-resistant support member satisfy: 0.2R4 ≤ R3×n ≤ R4, where: n is the number of elastic elements.

5. The anti-torsion shock-absorbing mechanism according to claim 2, wherein, R1 ≥ R2.

6. The anti-torsion shock-absorbing mechanism according to claim 3, wherein R1 ≤ 0.2R3; R2 ≥ 0.1×R3.

7. The anti-torsion shock-absorbing mechanism according to claim 1, characterized in that, The materials of the lower stop block and the upper stop block are wear-resistant composite materials.

8. A torsional anti-impact damping system, characterized in that, Comprising: The torsion anti-shock and vibration damping mechanism according to any one of claims 1 to 7, and a mechanism to be driven, wherein, the mechanism to be driven is connected to the gear in the torsion anti-shock and vibration damping mechanism.

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