CN217624085U

CN217624085U - Propeller with variable pitch function

Info

Publication number: CN217624085U
Application number: CN202221985899.3U
Authority: CN
Inventors: 邓江; 罗刚; 许智淇; 张文; 李正冰
Original assignee: Chongqing Zongshen Aircraft Engine Manufacturing Co ltd
Current assignee: Chongqing Zongshen Aviation Engine Manufacturing Co.,Ltd.
Priority date: 2022-07-29
Filing date: 2022-07-29
Publication date: 2022-10-21
Anticipated expiration: 2032-07-29

Abstract

The utility model relates to a screw specifically is a screw with displacement function, including kuppe, propeller hub, paddle assembly and displacement mechanism, displacement mechanism includes displacement motor and displacement switchgroup, the displacement motor is connected with the propeller hub is quiet, displacement switchgroup includes the switch body, displacement motor and propeller hub all are located the inside of kuppe, switch body and paddle assembly transmission cooperation, the displacement switchgroup is installed in the casing outside of displacement motor, the outside cover of displacement motor is equipped with the protection casing, be formed with the cavity that holds the displacement switchgroup between protection casing and the motor housing. The problem of screw take place displacement inefficacy easily among the prior art has been solved to this scheme.

Description

Propeller with variable pitch function

Technical Field

The utility model relates to a screw specifically is a screw with displacement function.

Background

As shown in fig. 1, the propeller with a variable pitch function includes an air guide sleeve 1, an electrical slip ring mounting disc 2, a hub, a blade assembly 3 and a variable pitch mechanism, the blade assembly 3 is in running fit with the hub, the variable pitch mechanism is mounted on the hub, the air guide sleeve 1 and the electrical slip ring mounting disc 4 surround the hub, and the blade assembly is driven to rotate by the variable pitch mechanism, so that the purpose of variable pitch is achieved. The variable-pitch mechanism comprises a variable-pitch motor and a variable-pitch switch group 4, the variable-pitch motor is used for generating variable-pitch power, the variable-pitch motor is installed on the propeller hub and is surrounded by the air guide sleeve, the variable-pitch switch group 4 is installed on the electric slip ring installation plate 2, the variable-pitch switch group 4 is electrically connected with the variable-pitch motor, and the variable-pitch switch group is normally in a normally closed state. The variable-pitch switch group comprises a switch body, a diode and a corresponding lead, the variable-pitch switch group is installed on one side of the electrical slip ring installation disc, which faces the aircraft engine, a cam corresponding to the switch body is connected to the root of the paddle assembly, the switch body can be triggered by rotation of the cam, the variable-pitch switch group is changed from a closed state to an open state, and therefore the variable-pitch motor can stop variable-pitch operation in time.

When such screw uses on unmanned aerial vehicle, the discovery takes place the phenomenon of displacement inefficacy easily to emergence accident when leading to unmanned aerial vehicle flight easily.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a screw with displacement function to the problem of displacement inefficacy takes place easily for the screw among the solution prior art.

In order to achieve the purpose, the utility model discloses a basic scheme provides a screw with displacement function, including kuppe, propeller hub, paddle assembly and displacement mechanism, displacement mechanism includes displacement motor and displacement switch group, displacement motor and propeller hub quiet connection, displacement switch group includes the switch body, displacement motor and propeller hub all are located the inside of kuppe, switch body and paddle assembly transmission cooperation, displacement switch group installs in the casing outside of displacement motor, the outside cover of displacement motor is equipped with the protection casing, be formed with the cavity that holds displacement switch group between protection casing and the motor housing.

The beneficial effect of this basic scheme lies in: adopt such setting, compare with prior art, make the displacement switch group sealed in the cavity between protection casing and motor housing, reduced the condition that the constitution spare part of displacement switch group takes place to damage by a wide margin to the phenomenon that makes the screw take place the displacement inefficacy reduces by a wide margin, has improved the reliability that the screw used on unmanned aerial vehicle.

Further, the variable pitch switch group comprises two switch bodies, and the two switch bodies are arranged in series. By adopting the arrangement, the reliability of the variable-pitch mechanism is improved.

Further, the variable pitch switch groups are arranged in two groups, and the two groups of variable pitch switch groups are symmetrically arranged on two sides of the variable pitch motor. By adopting the arrangement, the two groups of pitch-variable switch groups are conveniently utilized to respectively control the variable pitch of the pitch-variable motor and the variable pitch, and meanwhile, the arrangement of the pitch-variable switch groups can not influence the center-of-gravity offset rotary axis of the propeller, thereby being beneficial to ensuring the rotation stability of the propeller.

Further, the switch body of the variable pitch switch group is a button type microswitch. With such an arrangement, the reliability of the pitch varying mechanism can be further improved.

Drawings

FIG. 1 is a schematic view of a prior art propeller with pitch control;

fig. 2 is a schematic view of an embodiment of a propeller with pitch changing function according to the present invention;

fig. 3 is a schematic view illustrating a protective cover installed at an outer side of the pitch motor in fig. 2.

Detailed Description

The following is further detailed by way of specific embodiments:

reference numerals in the drawings of the specification include: the paddle assembly 11, the propeller hub 12, the switch body 13, the variable pitch motor 14 and the protective cover 15.

The embodiment is substantially as shown in figures 2 and 3: a propeller with a variable pitch function comprises an air guide sleeve, a hub 12, a blade assembly 11 and a variable pitch mechanism, wherein the blade assembly 11 is rotatably connected with the hub 12, and a variable pitch motor 14 and the hub 12 are both positioned in the air guide sleeve. The variable pitch mechanism comprises a variable pitch motor 14 and a variable pitch switch group, wherein the variable pitch motor 14 is electrically connected with the variable pitch switch group, the variable pitch motor 14 is fixedly connected with the hub 12, and the variable pitch switch group is positioned inside the air guide sleeve, and in the embodiment, the variable pitch switch group is preferably arranged outside a shell of the variable pitch motor 14. The variable pitch switch group includes switch body 13, and

switch body

13 and 11 transmission coordination of paddle assembly can trigger switch body 13 disconnection through the rotation of paddle body, for example, coaxial fixedly connected with cam on the paddle body is provided with the transmission connecting rod between cam and the switch body 13, and the one end and the cam sliding fit of transmission connecting rod, the other end and the 13 cooperations of switch body of transmission connecting rod drive the transmission connecting rod through the cam and remove and realize that transmission connecting rod triggers switch body 13.

In this embodiment, two pitch switch sets are disposed outside the casing of the pitch motor 14, and are respectively used for the pitch motor 14 to perform pitch increasing control and pitch decreasing control. The two pitch switch sets are symmetrically arranged on two sides of the pitch motor 14. In this embodiment, one pitch switch group includes two switch bodies 13, and the two switch bodies 13 are connected in series. The switch body 13 is preferably a push button type microswitch of the prior art. The protective cover 15 is sleeved on the outer side of the variable-pitch motor 14, the protective cover 15 is connected and fixed on the variable-pitch motor 14, and a cavity for accommodating the variable-pitch switch group is formed between the protective cover 15 and the motor shell, so that the variable-pitch switch group can be better protected in a sealed mode, the problems of rapid aging and damage of circuits and electronic components of the variable-pitch switch group are further avoided, and the reliability of the variable-pitch mechanism is improved.

The above description is only an example of the present invention, and the common general knowledge of the known specific structures and characteristics of the embodiments is not described herein. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several modifications and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent.

Claims

1. The utility model provides a screw with variable pitch function, includes kuppe, propeller hub, paddle assembly and variable pitch mechanism, variable pitch mechanism includes displacement motor and variable pitch switch group, the displacement motor is quiet with the propeller hub and is connected, variable pitch switch group includes the switch body, displacement motor and propeller hub all are located the inside of kuppe, the switch body and the transmission of paddle assembly cooperate its characterized in that: the variable-pitch motor is characterized in that the variable-pitch switch group is arranged on the outer side of a shell of the variable-pitch motor, a protective cover is sleeved on the outer side of the variable-pitch motor, and a cavity for accommodating the variable-pitch switch group is formed between the protective cover and a motor shell.

2. A propeller with variable pitch function according to claim 1, wherein: the variable-pitch switch group comprises two switch bodies, and the two switch bodies are connected in series.

3. A propeller with variable pitch function according to claim 2, wherein: the variable pitch switch sets are arranged in two groups, and the two groups of variable pitch switch sets are symmetrically arranged on two sides of the variable pitch motor.

4. A propeller having a variable pitch function according to claim 3, wherein: the switch body of the variable-pitch switch group is a button type microswitch.