Apparatus for controlling chain tension
AssigneeLG Industrial Systems Co., Ltd.
InventorYi Sug Kwon
Life of this patent
Estimating the term…
Abstract
A chain tension control apparatus for preventing a chain chattering in a power transmission system including main and subordinate sprockets and a chain connecting the main and subordinates sprockets. The apparatus maintains a chain tension by sensing a chain release and accordingly driving an electromagnet in accordance with a compensation signal that responds to chain release factors, and the chain tension in the apparatus is maintained by disposing a permanent magnet adjacent to the chain, thereby preventing chain vibration and noise from occurring.
Claims8
In a power transmission system including main and free wheeled subordinate sprockets and a chain formed of a plurality of links and rollers connected to each other, wherein said chain meshed to said main sprocket and said free wheeled subordinate sprocket transfers a rotation force of said main sprocket to said free wheeled subordinate sprocket,
- a chain tension control apparatus, comprising:
- a first chain release detecting sensor disposed adjacent to a central upper portion of an upper span of said chain and detecting a release of the upper span of said chain;
- a second chain release detecting sensor disposed adjacent to a central lower portion of a lower span of said chain and detecting a release of the lower span of said chain;
- a tension controller comparing respective signal values outputted from said first and second chain release detecting sensors with a reference value, and outputting first and second compensation signals for compensating each release of the upper span and lower span of said chain;
- a first electromagnet disposed adjacent to a central lower portion of the upper span of said chain, and downwardly attracting the upper span of said chain in accordance with said first compensation signal outputted from said tension controller;
- and
- a second electromagnet disposed adjacent to a central upper portion of the lower span of said chain, and upwardly attracting the lower span of said chain in accordance with said second compensation signal outputted from said tension controller.
In a power transmission system including main and free wheeled subordinate sprockets and a chain formed of a plurality of links and rollers connected to each other, wherein said chain meshed to said main sprocket and said free wheeled subordinate sprocket transfers a rotation force of said main sprocket to said free wheeled subordinate sprocket,
- a chain tension control apparatus, comprising:
- a first chain release detecting sensor disposed adjacent to a central upper portion of an upper span of said chain and detecting a release of the upper span of said chain;
- a second chain release detecting sensor disposed adjacent to a central lower portion of a lower span of said chain and detecting a release of the lower span of said chain;
- first and second A/D (Analog/Digital) converters correspondingly converting respective signal values outputted from said first and second chain release detecting sensors to digital signal values;
- a tension controller outputting first and second compensation signals for compensating a chain release of each of the upper and lower spans of said chain in correspondence with respective signal values outputted from said first and second A/D converters;
- first and second D/A (Digital/Analog) converters correspondingly converting said first and second compensation signals outputted from said tension controller to analog signals;
- first to fourth diodes rectifying positive and negative polarities of respective signal values outputted from said first and second D/A converters;
- first and second electromagnets disposed adjacent to a central lower portion of the upper span and to a central upper portion of the lower span of said chain, and downwardly attracting the upper span of said chain in accordance with respective signal values outputted from said first and second diodes;
- and
- third and fourth electromagnets disposed adjacent to a central lower portion of the upper span and to a central upper portion of the lower span of said chain, and upwardly attracting the lower span of said chain in accordance with respective signal values outputted from said third and fourth diodes.
Dependencies are inferred from the claim text.