WO2016072950A1

WO2016072950A1 - A joint mechanism for spherical surfaced gears

Info

Publication number: WO2016072950A1
Application number: PCT/TR2015/000335
Authority: WO
Inventors: Göksel DARCAN
Original assignee: Darcan Göksel
Priority date: 2014-11-06
Filing date: 2015-11-06
Publication date: 2016-05-12

Abstract

The invention is about a joint mechanism (1) which provides changing rotation axis of rotating shaft up to 180° while keeping speed and torque output linear and includes at least on helical or straight cut gear contact surface (1.1) on a spherical head, at least one contact clearance (1.2) between helical or straight gears (1.1) and at least one circular contact clearance (1.3) on spherical head to keep every teeth (1.1) to be exactly placed.

Description

A JOINT MECHANISM FOR SPHERICAL SURFACED GEARS ABSTRACT

Invention, is a pair of gears processed on a semi-spherical surface and a mechanism containing this gear system. Mechansim should be used for changing rotation axis (articulation) of rotating shaft joints.

Figure-1; a percpective view, showing working principle of the spherical surfaced gear mechansim which is subject to the invention. Despite it is shown on the figure that the gears are following a helical path to the peak of spheres, it is also in scope of invention if gears path is straight cut as in spur gears. Being helical is known as a general method applied for decreasing noise and vibration, also spreading the load on gear teeth. On the figure, it is a mechansim which contains the symmetric of designed gear oppositely, for changing rotation axis of rotating shafts or similar up to 180°. The primary subject of the invention is that the base of the gears are spherical and also the radius is not changing, transmission of rotation is lossless. Another benefit of mechansim that rotation speed and torque is also lossless except torque lost on friction.

Statue of known techniques: Cardan Joint

Cardan joint which is also known as universal joint is invented by Italian mathematician Gerolamo Cardano in 1545. Usually used to transmit power to differential gear on rear wheel driven vehicles from front placed engine. It allows a litte change to rotation axis. Also while rotating, speed on input shaft is not equal to output shaft, through the rotation speed is inceasing and decreasing respectively. After a specific angle between shafts, the transmission of torque reduces even loses. It rejects rotation or totally breaks.

Rzeppa Joint (US Patent 2,010,899)

It is used for transmitting power to front wheels of front wheel driven or all wheel driven vehicles and is invented in 1926 by Alfred Hans Rzeppa worked as an engineer at Ford Motor Company/Amerika. It transmits power with the help of balls moving inside a spherical shell. Typically it allows 45° - 48° change on rotation axis, and on some desings it allows up to 54°. Short description of invention:

The invention is; a mechanical gear design and the mechansim including this desgin to change rotation axis of rotating shafts, ensures the needs described above and clears of some known disadvantages, and brings some more advantages.

The invention is; a mechanism which allows keeping speed and torque linear on input and output shafts while allowing change of rotation axis up to 180° when needed.

The invention is; designed to have the pitch circle of gear teeth on a spherical surface and with the help of this, keeps the connection between shafts stable and strong.

The aim of invention is; to increase maneuverability of any vehicle used on automotive, agriculture or defense industries which has traction on front wheels. The aim of invention is; to decrease time and fuel consumption while increasing maneuverability.

The aim of invention is; to decrease carbon emissions while increasing maneuverability.

The aim of invention is; to take away power and torque loss on existing systems.

The aim of invention is; the need for a longer-lasting system against failures caused by the high friction and wear of existing systems.

The aim of invention is; to decrease fatal traffic accidents caused by failures caused by the high friction and wear of existing systems.

To fulfill the aims described above, the invention have to include;

· Gears processed on spherical head The structural and characterstic properties of the invention will be understood more clearly with help of detailed descriptions and citations to figures so the evaluation should be done according to these figures and descriptions. Figures That Aid to the Understanding of the Invention

"A Joint Mechanism For Sphencal Surfaced Gears" which is subject to this patent application is shown as a reference. Figures are not at exact scale and when needed it can be at any size and any tooth count. Also it can be helical or straight. These figures are as folows;

Figure 1 : Three dimensional perspevtive view of the invention.

Figure 2: Three dimensional perspective view of the invention from opposite view angle.

Figure 3: Three dimensional perspective view of angular movement gears.

Figure 4: Three dimensional perspective view of connecting rod.

Reference Numbers; 1 Gear MechanismTooth

1.1 Contact surface of tooth

1.2 Contact clearance

1.3 Circular contact clearance

2 Connecting rod

3 Angular movement gears

Detailed description of invention:

In this detailed description, joint mechanism for spherical surface gears subject to invention is described without any limitations to be better understood.

The invention is about, the design of a gear and a mechansim (1) including this gear to change rotation axis or articulating the joint of any kind of rotating shafts. Teeth (1.1) are uniquely designed as combination of zero-width infinite count of teeth (1.1) with pitch circle placed on spherical surface, where there is no existing example of this design of gear and mechanism. It is thought to keep spherical gears to be at correct perpendicular position for every articulation angle and to allow up to 180° of articulation.

The pitch circle of the gear teeth (1.1) being on a spherical surface is subject to the invention, but their helical or straight geometry will not change the working principle of the mechanism (1). Mechanism (1) is consisting of these two symmetric spherical gears to be placed oppositely. The aim of the gears being spherical is to keep the mechanism (1) constantly working at the absolute needed contact angle with the help of the connecting rod (2). The mechanism (1) includes two pieces of angular movement gears (3) and the joint axis beween connecting rod (2) and angular movement gears (3) is passing through the center of the sphere.

The gear mechansim (1) subject to invention includes; at least one helical or straight tooth contact surface (1.1), at least one helical or straight contact clearance (1.2), and a circular contact clearance (1.3) on spherical head to keep every teeth (1.1) to be exactly placed.

Claims

1- This invention is a gear mechanism (1) to allow changing of rotation axis of any kind of rotating shafts which includes at least one tooth contact surface (1.1) placed on spherical head, at least one contact clearance of tooth (1.2) and a circular contact clearance (1.3) on peak of spherical head.

2- Is a gear mechanism (1) suitable to Claim 1, where the tooth (1.1) path is helical. 3- Is a gear mechanism (1) suitable to Claim 1, where the tooth (1.1) path is straight- cut.

4- Is a gear mechanism (1) suitable to Claim 1, where the peak contact clearance (1.3) is circular.

5- Is a gear mechanism (1) suitable to Claim 1, which includes angular movement gear (3) and connecting rod (2).