Power transmission device of grinding and polishing machine

TWM687997UActive Publication Date: 2026-10-01BASSO IND CORP
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Patent Information

Application Number
TW114213451
Authority / Receiving Office
TW · TW
Patent Type
Utility models
Current Assignee / Owner
Filing Date
2025-12-18
Publication Date
2026-10-01
Estimated Expiration
2035-12-17

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Abstract

A power transmission device for a grinding and polishing machine includes an input shaft extending along a first axis, a motor for driving the input shaft to rotate, and a grinding disc. The grinding disc includes an output shaft. The power transmission device includes an eccentric member and a bolt. The eccentric member includes a bushing and two counterweights extending in opposite directions from a circumferential surface of the bushing and integrally formed with the bushing. The bushing defines a first shaft hole around the first axis and a second shaft hole around a second axis. The second shaft hole is fitted onto the output shaft. The bolt passes through the first shaft hole along the first axis and is connected to the input shaft, so that the eccentric member is driven by the input shaft and rotates together with the grinding disc. This invention simplifies the components and allows for quick replacement of the eccentric member.
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Claims

1. A power transmission device for a grinding and polishing machine, the grinding and polishing machine comprising an input shaft extending along a first axis, a motor for driving the input shaft to rotate, and a grinding disc suitable for surface treatment of a surface, the grinding disc comprising an output shaft parallel to the input shaft, the power transmission device comprising: an eccentric member comprising a bushing, and two counterweights extending in opposite directions from a circumferential surface of the bushing and integrally formed with the bushing, the bushing defining a first shaft hole around the first axis and defining a second shaft hole around a second axis parallel to the first axis, the second shaft hole being sleeved on the output shaft; and a bolt, passing through the first shaft hole along the first axis and connected to the input shaft, such that the eccentric member is driven by the input shaft and rotates together with the grinding disc.

2. The power transmission device for the grinding and polishing machine as described in claim 1, wherein, The bolt can be connected to the input shaft by means of screwing, tightening, or snapping.

3. The power transmission device for the grinding and polishing machine as described in claim 1, wherein, The second axis is separated from the first axis by an eccentricity, and the counterweights define a maximum diameter width along a radial line passing through the first axis and the second axis, the eccentricity being 10% to 25% of the maximum diameter width.

4. The power transmission device for the grinding and polishing machine as described in claim 3, wherein, The eccentricity is greater than 5mm.

5. The power transmission device for the grinding and polishing machine as claimed in claim 1, wherein, Each of the counterweights is fan-shaped and has two fan-shaped surfaces spaced apart along the first axis, two side surfaces connected to the fan-shaped surfaces, and an arc surface connecting the side surfaces and the fan-shaped surfaces. The side surfaces define an angle between the first axis and the first axis, the angle being between 90 degrees and 150 degrees.

6. The power transmission device for the grinding and polishing machine as described in claim 5, wherein, One of the arc surfaces is adjacent to the first axis and defines a first radius with respect to the first axis, and the other of the arc surfaces is adjacent to the second axis and defines a second radius smaller than the first radius with respect to the second axis.

7. The power transmission device for the grinding and polishing machine as described in claim 5, wherein, Each of the counterweights also has a hollow section extending from one of the fan surfaces to the other.

8. The power transmission device for the grinding and polishing machine as described in claim 7, wherein, One of the openings of these openwork sections is opposite to the opening of the other of these openwork sections.

9. The power transmission device for the grinding and polishing machine as claimed in claim 1, wherein, These counterweights have a positional difference along the direction of the first axis.