Main rotor hub mechanism for unmanned helicopter

An unmanned helicopter and main rotor technology, applied in the direction of rotorcraft, propellers, motor vehicles, etc., can solve the problems of poor bearing force and complicated maintenance, eliminate axial force, simplify maintenance steps, and increase use effect of life

Pending Publication Date: 2018-02-06
河南方达空间信息技术有限公司
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention proposes an unmanned helicopter main rotor hub mechanism, which solves the problems of poor bearing force in the existing unmanned helicopter rotor hub and complicated maintenance

Method used

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  • Main rotor hub mechanism for unmanned helicopter
  • Main rotor hub mechanism for unmanned helicopter

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Embodiment Construction

[0011] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0012] Such as Figure 1-2 As shown, a main rotor hub mechanism of an unmanned helicopter includes a main rotor head 1, and the main rotor head 1 is connected with a connecting shaft 3, and the connecting shaft 3 is connected with a main rotor hub 7, and the connecting shaft 3 passes through the main rotor hub. The grease cavity inside the rotor hub 7, the left side of the grease cavity is provided with a thrust bearing 14 and a ball bearing 12 in turn from ri...

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Abstract

The invention provides a main rotor hub mechanism for an unmanned helicopter. The main rotor hub mechanism comprises a main hub head, wherein the main hub head is connected with a connecting shaft; the connecting shaft is connected with a main rotor hub; the connecting shaft penetrates through a grease pocket inside the main rotor hub; a thrust bearing II and a ball bearing II are sequentially arranged on the left side of the grease pocket from the right to the left; a spacer sleeve II is arranged between the thrust bearing II and the ball bearing II; a thrust bearing I and a ball bearing I are sequentially arranged on the right side of the grease pocket from the right to the left; a spacer sleeve I is arranged between the thrust bearing I and the ball bearing I; a grease filling port communicated with the grease pocket is formed in the main rotor hub; the main rotor hub is connected with a main rotor blade; and rotor blade limiting screws are arranged on the main rotor hub. The main rotor hub mechanism disclosed by the invention has the advantages that axial force stressed by the ball bearing can be eliminated by changing a layout manner of the bearings in the hub, and the servicelife of the main rotor hub is prolonged; and moreover, the grease pocket is formed inside the hub, and the grease filling port is increased on the hub, so that convenience is brought to lubrication of the bearings in the hub.

Description

technical field [0001] The invention relates to an unmanned helicopter, in particular to a main rotor hub mechanism of an unmanned helicopter. Background technique [0002] At present, most unmanned helicopter propeller hubs use two pairs of ball bearings, or a pair of ball bearings plus a thrust bearing structure. This bearing arrangement will cause the ball bearings to always be in the static state after the preload is added. In the state of axial force; after the rotor rotates to the rated speed, the ball bearing may also receive the action of axial force, which will intensify the wear of the bearing balls, the inner ring of the bearing, and the outer ring of the bearing, resulting in a decrease in the life of the bearing. At the same time, the internal structure of the propeller hub is complicated, the number of bearings is relatively large, and it is not easy to assemble and disassemble. At present, most unmanned helicopters have no grease filling port on the main roto...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B64C27/32B64C11/02
CPCB64C11/02B64C27/32
Inventor 校明俊马建超闫军胜赵楠史建峰
Owner 河南方达空间信息技术有限公司
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