WO2022260634A1 - Differential gearbox with output shafts that are on the same side and rotate in reverse directions - Google Patents

Differential gearbox with output shafts that are on the same side and rotate in reverse directions Download PDF

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Publication number
WO2022260634A1
WO2022260634A1 PCT/TR2022/050539 TR2022050539W WO2022260634A1 WO 2022260634 A1 WO2022260634 A1 WO 2022260634A1 TR 2022050539 W TR2022050539 W TR 2022050539W WO 2022260634 A1 WO2022260634 A1 WO 2022260634A1
Authority
WO
WIPO (PCT)
Prior art keywords
gear
movement
internal
rotation
rotates
Prior art date
Application number
PCT/TR2022/050539
Other languages
French (fr)
Inventor
Ali Turan
Original Assignee
Ali Turan
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from TR2021/009347 external-priority patent/TR2021009347A1/en
Application filed by Ali Turan filed Critical Ali Turan
Publication of WO2022260634A1 publication Critical patent/WO2022260634A1/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
    • B64D35/00—Transmitting power from power plants to propellers or rotors; Arrangements of transmissions
    • B64D35/04—Transmitting power from power plants to propellers or rotors; Arrangements of transmissions characterised by the transmission driving a plurality of propellers or rotors
    • B64D35/06—Transmitting power from power plants to propellers or rotors; Arrangements of transmissions characterised by the transmission driving a plurality of propellers or rotors the propellers or rotors being counter-rotating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H48/00—Differential gearings
    • F16H48/06—Differential gearings with gears having orbital motion
    • F16H48/10—Differential gearings with gears having orbital motion with orbital spur gears
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H48/00—Differential gearings
    • F16H48/38—Constructional details
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H48/00—Differential gearings
    • F16H48/38—Constructional details
    • F16H48/42—Constructional details characterised by features of the input shafts, e.g. mounting of drive gears thereon
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64C—AEROPLANES; HELICOPTERS
    • B64C27/00—Rotorcraft; Rotors peculiar thereto
    • B64C27/04—Helicopters
    • B64C27/08—Helicopters with two or more rotors
    • B64C27/10—Helicopters with two or more rotors arranged coaxially
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H48/00—Differential gearings
    • F16H48/06—Differential gearings with gears having orbital motion
    • F16H48/10—Differential gearings with gears having orbital motion with orbital spur gears
    • F16H2048/106—Differential gearings with gears having orbital motion with orbital spur gears characterised by two sun gears

Definitions

  • the output shafts of differential gearboxes have the same rotation torques. They are used in various applications thanks to this property, specifically in the automotive sector.
  • the gearboxes are used for the transmission of rotary movement extracted from gearbox or electric motor to the wheels in equal torques. Though the output torques of the differential gearboxes are same, their rotary speeds can differ. This enables the cornering capabilities of automobiles, toleration of wheel diameter inequal caused by erosion.
  • the gearboxes have outputs on two opposite sides, and their movements are directed to the wheels.
  • This invention is related to differential gearboxes with output shafts that are on the same side and rotate in reverse directions for their use in coaxial rotor helicopters.
  • FIGURE- 1 The structure of differential gearbox that consists of output shafts on the same side
  • FIGURE-2 A disassembled view of the structure of differential gearbox that consists of output shafts on the same side.
  • FIGURE-3 Internal gear (2) FIGURE-4.
  • Pinion gears (5) connected to internal gear (2), move together with the main movement gear, and can rotate around their own axis
  • FIGURE-5 Pinion gears (3) connected to internal gear (2), mounted to body, and can rotate around their own axis FIGURE-6.
  • FIGURE-7 Direction of rotation of internal gear (2), pinion gears (3) that are mounted to body and can rotate around their own axis, and the gear that rotates the outer movement shaft.
  • the shafts In the differential gearbox with output shafts that are on the same side and rotate in reverse directions, the shafts should be nested such that one is positioned inside of the other, for the movement shafts to be positioned on the same side and same point of the gearbox.
  • These movement shafts are the outer movement shaft (8) and the internal movement shaft (11) shown on Figure-1 and Figure-2.
  • the rotation movement extracted from engines/motors are transmitted to differential gearbox through the shaft of gear l for the input movement (13) and the shaft of gear_2 for the input movement (15). If a single engine/motor is used, the differential gearbox consists of only one gear l for the input movement (12) and the shaft of gear l for the input movement (13). If more than two engine/motor is used, the number of shafts and gears for the input movement will be same as the engine/motor count.
  • pinion gears that move together with the main movement gear and can rotate around their own axis (5) that are installed to the shafts (6) on the main movement gear (9) and can rotate around their own axis.
  • the pinion gears that move together with the main movement gear and can rotate around their own axis (5) supply rotation to the gear that rotates the internal movement shaft (10) and internal gear (2), while being rotated together with the main movement gear (9). Because the gear that rotates the internal movement shaft (10) rotates together with the internal movement shaft (11) because it is connected to the internal movement shaft (11).
  • the rotation of pinion gears (5) around their own axis can be in either direction according to their speed difference to internal gear (2) and the gear that rotates the internal movement shaft (10).
  • the positioning of the pinion gears (3), which are mounted to body and rotate around their own axis, relative to the body are fixed by the shafts (4) mounted to body. They can only rotate around their own axis.
  • the pinion gears (3) which are mounted to body and rotate around their own axis, supply rotation to the gear (7), which rotates the outer movement shaft, in the opposite direction, FIGURE-7.
  • the reverse rotation of two output shafts are realized at the point.
  • the gear that rotates the outer movement shaft (7) engages with the outer movement shaft (8) and supplies rotation to the outer movement shaft (8).
  • FIGURE-6 and FIGURE-7 can be reverse depending on the direction of rotation of the input to the differential gearbox.
  • an angle gear is preferred for the main movement gear (9) for a 90-degree rotation of the movement.
  • angle gears are preferred for the gear l for the input movement (12) and gear_2 for the input movement (14).
  • This invention presents the following.
  • the output movement shafts are available as nested shafts positioned on the same side and place on the gearbox body, as opposed to conventional gearboxes. These output movement shafts rotate in reverse direction.
  • a system of gears is used within in the embodiment of the gearboxes, as in the conventional or various gearboxes.
  • a novelty has been introduced with the structure of gears and engagement, which constitutes a novel gearbox to be used in coaxial rotor helicopters. This system does not cover the structure of individual gears, but with the joint functioning of them.
  • This invention is related to the design of a differential gearbox, the embodiment and endurance of it and its gears, which are made possible by combining various disciplines and engineering studies.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Retarders (AREA)

Abstract

This invention is about nested output shafts on the same side of the differential gearbox. The rotation of output shafts is in reverse directions and consists of differential features.

Description

DIFFERENTIAL GEARBOX WITH OUTPUT SHAFTS THAT ARE ON THE SAME SIDE AND ROTATE IN REVERSE
DIRECTIONS
As part of their property, the output shafts of differential gearboxes have the same rotation torques. They are used in various applications thanks to this property, specifically in the automotive sector. In automobiles, the gearboxes are used for the transmission of rotary movement extracted from gearbox or electric motor to the wheels in equal torques. Though the output torques of the differential gearboxes are same, their rotary speeds can differ. This enables the cornering capabilities of automobiles, toleration of wheel diameter inequal caused by erosion. In automobiles, the gearboxes have outputs on two opposite sides, and their movements are directed to the wheels.
For the use of differential gearboxes in coaxial rotor helicopters, their outputs should be on the same side, while their rotary movements should differ in direction. The reverse direction of the equal torque forces applied to the propellers cancel each other and prevents a rotation force on the body of the helicopter.
This invention is related to differential gearboxes with output shafts that are on the same side and rotate in reverse directions for their use in coaxial rotor helicopters.
FIGURES and EXPLANATIONS
FIGURE- 1. The structure of differential gearbox that consists of output shafts on the same side
FIGURE-2. A disassembled view of the structure of differential gearbox that consists of output shafts on the same side.
FIGURE-3. Internal gear (2) FIGURE-4. Pinion gears (5) connected to internal gear (2), move together with the main movement gear, and can rotate around their own axis
FIGURE-5. Pinion gears (3) connected to internal gear (2), mounted to body, and can rotate around their own axis FIGURE-6. Direction of rotation of internal gear (2), pinion gears (5) that move together with the main movement gear and rotate around their own axis, and the gear (10) that rotates the internal movement shaft.
FIGURE-7. Direction of rotation of internal gear (2), pinion gears (3) that are mounted to body and can rotate around their own axis, and the gear that rotates the outer movement shaft.
THE EXPLANATION OF NUMBERS ON THE FIGURES
1. Body
2. Internal gear
3. Pinion gears that are mounted to body and rotate around their own axis
4. The shaft mounted to body
5. Pinion gears that move together with the main movement gear and can rotate around their own axis
6. The shafts mounted to the main movement gear
7. The gear that rotates the outer movement shaft
8. The outer movement shaft
9. The main movement gear
10. The gear that rotates the internal movement shaft
11. The internal movement shaft
12. Gear l for the input movement
13. The shaft of Gear l for the input movement
14. Gear_2 for the input movement
15. The shaft of Gear_2 for the input movement
16. Direction of rotation of internal gear
17. Direction of rotation of the group of pinion gears that move together with the main movement gear and can rotate around their own axis
18. Direction of rotation of the gear that rotates the internal movement shaft
19. Direction of rotation of the pinion gears that move together with the main movement gear and can rotate around their own axis
20. Direction of rotation of the group of pinion gears that are mounted to body and rotate around their own axis
21. Direction of rotation of the gear that rotates the outer movement shaft DESCRIPTION
In the differential gearbox with output shafts that are on the same side and rotate in reverse directions, the shafts should be nested such that one is positioned inside of the other, for the movement shafts to be positioned on the same side and same point of the gearbox. These movement shafts are the outer movement shaft (8) and the internal movement shaft (11) shown on Figure-1 and Figure-2.
The rotation movement extracted from engines/motors are transmitted to differential gearbox through the shaft of gear l for the input movement (13) and the shaft of gear_2 for the input movement (15). If a single engine/motor is used, the differential gearbox consists of only one gear l for the input movement (12) and the shaft of gear l for the input movement (13). If more than two engine/motor is used, the number of shafts and gears for the input movement will be same as the engine/motor count.
The gear l for the input movement (12), which is rotated by the input movement shaft (13), and the gear_2 for the input movement (14), which is rotated by the input movement shaft (15), rotate the main movement gear (9).
There are pinion gears that move together with the main movement gear and can rotate around their own axis (5) that are installed to the shafts (6) on the main movement gear (9) and can rotate around their own axis.
The pinion gears that move together with the main movement gear and can rotate around their own axis (5) supply rotation to the gear that rotates the internal movement shaft (10) and internal gear (2), while being rotated together with the main movement gear (9). Because the gear that rotates the internal movement shaft (10) rotates together with the internal movement shaft (11) because it is connected to the internal movement shaft (11).
The direction of rotation of internal gear (2) and the gear that rotates the internal movement shaft (10) are same, FIGURE-6. However, their speed can differ proportionally to the differences of torques applied to the output movement shafts. These speed differences appear on the pinion gears (5) that move together with the main movement gear and can rotate around their own axis, and creates the differential property.
The rotation of pinion gears (5) around their own axis can be in either direction according to their speed difference to internal gear (2) and the gear that rotates the internal movement shaft (10). Direction of rotation of the pinion gears that move together with the main movement gear and can rotate around their own axis (19), FIGURE-6. The internal gear (2) that rotates in the same direction with the gear that rotates the internal movement shaft (10), supplies rotation to all pinion gears (3), which are mounted to body and rotate around their own axis, in the same direction. The positioning of the pinion gears (3), which are mounted to body and rotate around their own axis, relative to the body are fixed by the shafts (4) mounted to body. They can only rotate around their own axis. The pinion gears (3), which are mounted to body and rotate around their own axis, supply rotation to the gear (7), which rotates the outer movement shaft, in the opposite direction, FIGURE-7. The reverse rotation of two output shafts are realized at the point. The gear that rotates the outer movement shaft (7) engages with the outer movement shaft (8) and supplies rotation to the outer movement shaft (8).
The direction of rotation shown on FIGURE-6 and FIGURE-7 can be reverse depending on the direction of rotation of the input to the differential gearbox.
Often an angle gear is preferred for the main movement gear (9) for a 90-degree rotation of the movement. When bevelled gear is preferred for the main movement gear (9), angle gears are preferred for the gear l for the input movement (12) and gear_2 for the input movement (14). These are preferences and not related to the content of the invention.
This invention presents the following. In the differential gearbox developed for use in coaxial rotor helicopters, the output movement shafts are available as nested shafts positioned on the same side and place on the gearbox body, as opposed to conventional gearboxes. These output movement shafts rotate in reverse direction. For this purpose, a system of gears is used within in the embodiment of the gearboxes, as in the conventional or various gearboxes. However, a novelty has been introduced with the structure of gears and engagement, which constitutes a novel gearbox to be used in coaxial rotor helicopters. This system does not cover the structure of individual gears, but with the joint functioning of them.
This invention is related to the design of a differential gearbox, the embodiment and endurance of it and its gears, which are made possible by combining various disciplines and engineering studies.

Claims

1. Differential gearbox with output shafts that are on the same side and rotate in reverse directions, characterized in that; for the outer movement shaft (8) and the internal movement shaft (11) to turn in reverse directions, and to be positioned on the same side and place on the gearbox body, by the changing position of the pinion gears (5), which move together with the main movement gear and can rotate around their own axis, and are positioned between the internal gear (2) and the gear that rotates the internal movement shaft (10), with the rotation of the main movement gear (9), it supports the following features
• supplies rotation to the internal gear (2) and the gear that rotates the internal movement shaft (10) in the direction of rotation of main movement gear (9),
• transmitting the rotation of internal gear (2), which rotates in the direction of rotation of main movement gear (9), in the reverse direction to the gear that rotates the outer movement shaft (7), by the pinion gears (3), which are mounted to body and rotate around their own axis,
• compensating the rotation speed difference between the internal gear (2) and the gear that rotates the internal movement shaft (10), by the rotation of the pinion gears (5), which move together with the main movement gear and can rotate around their own axis, around their own axis.
2. The differential gearbox with output shafts that are on the same side and rotate in reverse directions according to Claim 1 , characterized in that; the gear that rotates the outer movement shaft (7), which engages with the outer movement shaft (8), and the gear that rotates the internal movement shaft (10), which engages with the internal movement shaft (11), are positioned within the internal gear (2), and able to rotate in reverse direction to each other.
PCT/TR2022/050539 2021-06-07 2022-06-06 Differential gearbox with output shafts that are on the same side and rotate in reverse directions WO2022260634A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
TR2021/009347 TR2021009347A1 (en) 2021-06-07 Differential gearbox rotating in opposite directions and having output shaft from the same side
TR2021009347 2021-06-07

Publications (1)

Publication Number Publication Date
WO2022260634A1 true WO2022260634A1 (en) 2022-12-15

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112357076A (en) * 2020-08-24 2021-02-12 南京航空航天大学 Coaxial dual-rotor helicopter transmission device with cylindrical gear shunt
CN112810811A (en) * 2021-01-19 2021-05-18 清华大学 Dual-rotor unmanned aerial vehicle

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112357076A (en) * 2020-08-24 2021-02-12 南京航空航天大学 Coaxial dual-rotor helicopter transmission device with cylindrical gear shunt
CN112810811A (en) * 2021-01-19 2021-05-18 清华大学 Dual-rotor unmanned aerial vehicle

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
THANG010146: "Coaxial gearbox 2", YOUTUBE, XP093017621, Retrieved from the Internet <URL:https://www.youtube.com/watch?v=aaGhPGV6xqM> [retrieved on 20230125] *

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