Reference:

IRCPK/04/TO/07

Organization:

Cracow University of Technology

IRC Name:

IRC South Poland

Country:

Poland

Entry Date:

Wed, April 11, 2001

Last Update:

Tue, April 23, 2002

Deadline:

Thu, April 10, 2003

Abstract:

A Polish company has developed a variable-speed transmission gear for variable change of rotational speed. This gear consists of a system of at least three mate gears. The central gear is a bevel gear that has the form of a prolate cone frustum, on which surface teeth of a special configuration are distributed in a way that enables them to mate with two analogical bevel gears for drive transmission. The company is open to all cooperation types with industrial or research partners.

Description:

A Polish company has developed a variable-speed transmission gear for variable change of rotational speed that consists of a system of at least three mate gears. The transmission gear is the central one and has the form of a prolate cone frustum, on which surface gears of a special configuration are distributed. Their configuration changes in a way that is described by relevant mathematical equations. This enables the gears transmitting the drive to mate correctly on any arbitrary orbit of the central bevel gear, thus enabling a variable change of rotational speed. A model of such a special gear has been made on a machine tool (milling machine) with numerical control and five degrees of freedom.

Innovative Aspects:
Contrary to the variable-speed transmission gears known so far (gyroscope, hydraulic, friction, controlled by current of stepwise changing intensity or voltage), this gear enables variable-speed change of rotational speed by means of the mate gears only, thus giving better efficiency in high-duty operation.

Main Advantages:
- High efficiency of variable-speed (stepless) change of rotational speed in high-duty operation
- Acceleration at constant driving force and savings in energy, e.g. fuel
- Possibility to design and construct a compact differential mechanism

Technology Keywords:

Design and Modelling / Prototypes

Current Stage of Development:

Available for demonstration

Exploitation of RTD Results:

None

Intellectual Property Rights:

Patent(s) granted

Comments

patent granted in Poland

Organisation/Company Type:

Research institute/University

Organisation/Company Size:

50-249

Brief Market Application Codes:

INDUSTRY

Comments

Detailed Market Application Codes (VEIC):

Keywords

Other Industrial Products (not elsewhere classified)

Highlights
This variable-speed transmission gear may be used in gear boxes of vehicles, hoists, cranes and machine tools, in differential mechanisms, agricultural machines, etc.

Collaboration Type:

Technical Co-operation
Joint venture agreement
License agreement
Commercial Agreement with Technical Assistance
Manufacturing agreement (Subcontracting & Co-contracting)
Financial resources

Comments
all kinds of cooperation are welcome with industry (engine tools, automotive industry), research companies, universities etc. ready to find other applications for offered solution

Preferred Countries for diffusion:

ALL

Additional Information:

Contact Name:

Kubik

Contact First name:

Artur

Phone:

+48 12 628 25 45

Fax:

+48 12 632 47 95

Email:

mailto:artur@transfer.edu.pl