Centrifugal clutch for aircraft with over-bridge adaptation

Abstract

This utility model discloses a centrifugal clutch for aircraft with a bridge transition, relating to the field of clutch technology. The utility model includes: a coupling hub, a connector block, an upper flange, and a lower flange. This utility model achieves lightweight and high wear resistance by using 7075 aluminum alloy for the coupling hub and heat-sealing it with a wear-resistant steel ring. An aluminum alloy transition bridge is added between the coupling hub and the lower flange to form an axial flexible connection, solving the problems of heavy weight, strong vibration transmission, and complex maintenance of traditional cast iron clutches. It is suitable for rotorcraft power systems.

Description

Technical Field

[0001] This utility model belongs to the field of clutch technology, specifically, it relates to a centrifugal clutch for aircraft with a bridge transition. Background Technology

[0002] A centrifugal clutch is an automatic clutch, belonging to the category of self-controlled clutches. Its working principle is based on the centrifugal force effect. When the speed of the drive shaft reaches the set value, the centrifugal force drives the engagement element to automatically connect or disconnect the transmission part without external control. Structurally, it is divided into various types such as brake block type, steel ball type, steel sand type, and steel bar type. Among them, the fully centrifugal clutch relies entirely on centrifugal force to maintain the engagement state. It is commonly found in small cars driven by high-speed engines. Compared with other clutches, the centrifugal clutch has the characteristics of compact structure and automatic response. Centrifugal clutches are also used in some aircraft. The hub of a traditional centrifugal clutch is mostly made of cast iron or iron and has no bridge transition.

[0003] In view of this, this utility model is hereby proposed. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a centrifugal clutch for aircraft with a bridge transition, which solves the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by this utility model is as follows:

[0006] A centrifugal clutch for aircraft with a bridge adapter includes: a coupling hub, characterized in that a connector hub block is provided at the bottom of the coupling hub, a lower flange is provided at the top of the coupling hub, and an upper flange is provided at the top of the lower flange.

[0007] Optionally, the coupling hub is made of aluminum alloy.

[0008] Optionally, the inner wall of the coupling hub is fitted with an alloy wear-resistant steel ring.

[0009] Optionally, a transition bridge is provided between the coupling hub and the lower flange.

[0010] Optionally, a coupling buffer rubber is provided between the upper flange and the lower flange.

[0011] By adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art. Of course, any product implementing the present invention does not necessarily need to achieve all of the following advantages at the same time:

[0012] 1. The aircraft with a bridge-connector uses a centrifugal clutch to rotate when the engine is started. As the throttle is increased at a constant speed, the clutch and the hub are combined to drive the main rotor to rotate. The hub of the centrifugal clutch uses 7075 aviation aluminum as the outer shell. Lightweight design was carried out without affecting the strength of the outer shell, which reduced the weight. The inner alloy wear-resistant steel sleeve enhances the reliability of the aircraft engine power transmission and makes the aircraft lighter overall.

[0013] 2. The centrifugal clutch of this aircraft with a bridge transfer adds a transfer bridge between the coupling hub and the flange, so that the coupling hub cooperates with the transmission bridge, the engine and the main rotor assembly are softly connected, the main rotor is softly started, and the entire assembly is more convenient to disassemble, maintain and repair.

[0014] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings. Attached Figure Description

[0015] The accompanying drawings described below are merely some embodiments. Those skilled in the art can obtain other drawings based on these drawings without any creative effort. In the drawings:

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a schematic diagram from another perspective of the present invention;

[0018] Figure 3 This is an exploded view of the present invention.

[0019] The attached diagram lists the components represented by each number as follows:

[0020] 1. Coupling hub; 2. Connector hub; 3. Coupling buffer rubber; 4. Upper flange; 5. Alloy wear-resistant steel ring; 6. Adapter bridge; 7. Lower flange.

[0021] It should be noted that these accompanying drawings and textual descriptions are not intended to limit the scope of the present invention in any way, but rather to illustrate the concept of the present invention to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0022] The present invention will now be described in further detail with reference to the accompanying drawings.

[0023] Please see Figure 1-3 As shown, this embodiment provides a centrifugal clutch for aircraft with a bridge adapter, including: a coupling hub 1.

[0024] like Figure 1-3 As shown, in this embodiment, the bottom of the coupling hub 1 is provided with a connector block 2, the top of the coupling hub 1 is provided with a lower flange 7, and the top of the lower flange 7 is provided with an upper flange 4. The connector block 2 has multiple sets of bearings installed inside by screws. When the engine is started, the connector block 2 is driven to rotate. As the throttle is increased at a constant speed, the connector block 2 is combined with the coupling hub 1, and the main rotor is driven to rotate through the connection between the upper flange 4 and the lower flange 7 on the back.

[0025] like Figure 1-3 As shown, the coupling hub 1 in this embodiment is made of 7075 aluminum alloy; wherein, the coupling hub 1 is precision machined using 7075 aviation aluminum. Aviation aluminum has higher strength and wear resistance, and is lighter than iron, making the overall clutch lighter while having a certain strength.

[0026] like Figure 1-3 As shown, in this embodiment, the inner wall of the coupling hub 1 is fitted with an alloy wear-resistant steel ring 5; wherein, the outer aluminum coupling hub 1 shell and the inner alloy wear-resistant steel ring 5 are installed by a hot fitting process of thermal expansion and contraction interference fitting, and a permanent bond is formed after cooling, ensuring no relative slippage at high speed, so that the two are tightly connected, and the inner lining of the alloy wear-resistant steel ring 5 makes the coupling hub 1 stronger and less prone to deformation.

[0027] like Figure 1-3 As shown, in this embodiment, a transition bridge 6 is provided between the coupling hub 1 and the lower flange 7; wherein, the transition bridge is made of 7075 aluminum alloy precision casting, and has an H-shaped structure with round ends. One side is connected to the coupling hub 1, and the other side is positioned and matched with the lower flange 7 to form a non-rigid transmission path, effectively isolating the high-frequency vibration of the engine. The bolt connection makes it easier to separate the power chain without disassembling the clutch as a whole.

[0028] like Figure 1-3 As shown, in this embodiment, a coupling buffer rubber 3 is provided between the upper flange 4 and the lower flange 7; wherein, the coupling buffer rubber 3 is a rubber molding part, which achieves bidirectional compression through interference fit. The rubber damping characteristics control the vibration amplitude of the transmission system to the minimum, while absorbing instantaneous impact torque and avoiding hard contact damage to the rotor mechanism.

[0029] Working principle: The engine drives the connector swing block 2 to rotate. When the centrifugal force does not reach the threshold, the swing block maintains a gap with the inner wall of the alloy wear-resistant steel ring 5, and the main rotor has no torque input. When the rotation speed continues to increase and the centrifugal force reaches the threshold, the connector swing block 2 and the alloy wear-resistant steel ring 5 come into frictional contact. The torque is transmitted to the lower flange 7 through the adapter bridge 6. The peak torque is absorbed by the coupling buffer rubber 3, and the power is output smoothly.

[0030] This utility model is not limited to the above-described embodiments. Anyone should know that structural changes made under the guidance of this utility model, and any technical solutions that are the same as or similar to this utility model, fall within the protection scope of this utility model. Technical aspects, shapes, and structures not described in detail in this utility model are all publicly known technologies.

Claims

1. A centrifugal clutch for an aircraft with a bridge-type transition, comprising: The coupling hub (1) is characterized in that a connector hub block (2) is provided at the bottom of the coupling hub (1), a lower flange (7) is provided at the top of the coupling hub (1), an upper flange (4) is provided at the top of the lower flange (7), the coupling hub (1) is made of 7075 aluminum alloy, and a transition bridge (6) is provided between the coupling hub (1) and the lower flange (7), the transition bridge (6) is made of aluminum alloy.

2. A centrifugal clutch for aircraft with a bridge-type adapter according to claim 1, characterized in that, The inner wall of the coupling hub (1) is fitted with an alloy wear-resistant steel ring (5).

3. A centrifugal clutch for aircraft with a bridge-type adapter according to claim 1, characterized in that, A coupling buffer rubber (3) is provided between the upper flange (4) and the lower flange (7).

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