GRINDING DEVICE

Abstract

A grinding device for grinding a cylinder that has a rotating shaft includes an immovable component, a movable component, and a grinding component. The immovable component has a positioning unit. The cylinder has the rotating shaft positioned by the positioning unit. The movable component has a carrying portion and is such installed on the immovable component that the movable component can move axially along the rotating shaft. The carrying portion positionally corresponds to the cylinder. The grinding component is located on the carrying portion and positionally corresponds to a surface of the rotating shaft. The grinding device thereby is able to grind the rotating shaft of the cylinder evenly with reduced labor costs.

Description

BACKGROUND OF THE INVENTION

1. Technical Field

The present invention relates to mechanical processing device, and more particularly to a grinding device for making cylinders or cylindrical workpieces.

2. Description of Related Art

A conventional approach to grinding cylinders or cylindrical workpieces is that workers use abrasive paper to manually grind the workpieces at where the workpieces will rotationally combined with other articles. However, the result of manual grinding is highly dependent on the workers' skill and it is often seen that the grounded sites are not evenly and/or adequately processed. When such a ragged and/or rough cylinder (such as a rotor shaft) is applied or assembled as a part to a mechanism (such as a motor), it is unlikely to fit the surrounding parts well, and the resultant poor combination can generate noise and/or even have adverse effects on the service life of the mechanism, in turn causing great trouble to the users. Therefore, the conventional approach needs to be improved.

BRIEF SUMMARY OF THE INVENTION

In view of the aforementioned need, the primary objective of the present invention is to provide a grinding device that grinds cylinders with better quality and lower labor costs, and endows the ground cylinders with improved evenness and fineness.

For achieving the objective as stated above, the disclosed grinding device is configured to grind a cylinder that has a rotating shaft. The grinding device comprises an immovable component, a movable component, and a grinding component. The immovable component has a positioning unit. The cylinder is such installed on the positioning unit that it is rotatable against the rotating shaft. The movable component has a carrying portion. The movable component is such installed on the immovable component that it is axially movable along the rotating shaft. The carrying portion is positionally corresponding to the cylinder. The grinding component is located on the carrying portion and positionally corresponding to a surface of the rotating shaft. Thereby, when the cylinder rotates against the rotating shaft, the grinding component peripherally grinds peripherally grinds the surface of the rotating shaft. When the movable component move axially along the rotating shaft, the grinding component also move axially along the rotating shaft of the cylinder and linearly grinds the surface of the rotating shaft, thereby making the surface of the rotating shaft ground more evenly.

The invention as well as a preferred mode of use, further objectives and advantages thereof will be best understood by reference to the following detailed description of illustrative embodiments when read in conjunction with the accompanying drawings.

BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS

FIG. 1 is a front view of a preferred embodiment of the present invention.

FIG. 2 is a side view of the preferred embodiment of the present invention, showing that the driving unit drives the cylinder to rotate.

FIG. 3 and FIG. 4 are front views of the preferred embodiment of the present invention, showing that the driven unit drives the movable component.

FIG. 5 is a side view of the preferred embodiment of the present invention, showing that the driving unit is unable to drive the cylinder to rotate.

DETAILED DESCRIPTION OF THE INVENTION

Referring to FIG. 1 through FIG. 5, according to the present invention, a grinding device 10 used for grinding a cylinder 20 is disclosed. In the depicted preferred embodiment, the cylinder 20 is illustratively a motor rotor. The cylinder 20 has a rotating shaft 22. The grinding device 10 comprises an immovable component 30, a movable component 40, and two grinding components 50.

The immovable component 30 comprises a carrying surface 32, a positioning unit 34, a driving unit 36, and a driven unit 38. The carrying surface 32 is a smooth surface. The positioning unit 34 is deposited on the carrying surface 32. The positioning unit 34 comprises two fixing shafts 342, two posts 343, and a positioning space 344. The two posts 343 each have one end perpendicular installed on the carrying surface 32. The two fixing shafts 342 are each located at the other end of the two post 343. The two fixing shafts 342 are axially aligned. The positioning space 344 is defined between the two fixing shafts 342. The cylinder 20 is placed in the positioning space 344 and rotatable against the rotating shaft 22. The two fixing shafts 342 abut against two ends of the rotating shaft 22, so as to support the cylinder 20 to rotate against the rotating shaft 22.

The driving unit 36 comprises a first power source 362 and a driving member 364. The driving member 364 is pivotally movable between a first position P1 (as shown in FIG. 2) and a second position P2 (as shown in FIG. 5). The first power source 362 may be a motor or the like, for powering the driving member 364 to act while the driving member 364 may be a belt set or the like. When the driving member 364 is at the first position P1, the first power source 362 drives the driving member 364 to act. Since the driving member 364 is pressing upon the cylinder 20, the cylinder 20 is driven to rotate against the rotating shaft 22. When the driving member 364 is at the second position P2, the driving member 364 is away from the cylinder 20, and the cylinder 20 is not driven to rotate. The driven unit 38 comprises a second power source 382 and a cam 384. The second power source 382 powers the cam 384 to rotate.

The movable component 40 is installed on the carrying surface 32. The movable component 40 comprises a carrying portion 42, a rail unit 44, and a frame 48. The movable component 40 slides on the rail unit 44 so as to move over the carrying surface 32. The carrying portion 42 is positionally corresponding to the cylinder 20. The carrying portion 42 has two symmetrically formed notches 422 for receiving the two ends of the rotating shaft 22 of the cylinder 20. The carrying portion 42 has two clip slots 46 each located by one of the two notches 422. The frame 48 is provided beside the movable component 40, so that the cam 384 and the frame 48 press against each other. Thereby, when the second power source 382 drives the cam 384 to rotate, the cam 384 in turn drives the movable component 40 to move linearly to and fro along the carrying surface 32.

The grinding component 50 may be abrasive paper, sand cloth or other materials having abrasive effects. The grinding component 50 may be in the form of a flat sheet or a roll that can automatically expand or roll up. The grinding components 50 are held in the clip slots 46, so that the grinding components 50 are corresponding to the surfaces of the two ends of the rotating shaft 22 of the cylinder 20. When the two ends of the rotating shaft 22 of the cylinder 20 are received in the two notches 422, the surfaces of the two ends of the rotating shaft 22 of the cylinder 20 abut against the two grinding components 50, respectively.

The technical features described above may be further explained with reference to FIG. 1 and FIG. 2. The cylinder 20 is placed on the carrying portion 42 so that the surfaces of the two ends of the rotating shaft 22 of the cylinder 20 contact the grinding components 50, respectively, and the two fixing shafts 342 abut against the two ends of the rotating shaft 22. When the driving member 364 is at the first position P1, the driving member 364 is pressing on the cylinder 20, so the two ends of the rotating shaft 22 are pushed toward and thereby press more closely on the grinding components 50. Referring to FIG. 3 and FIG. 4, when the first power source 362 drives the driving member 364, the driving member 364 in turn drives the cylinder 20 to rotate against the rotating shaft 22, which allowing the grinding components 50 to peripherally grind the surfaces of the two ends of the rotating shaft 22. When the second power source 382 at the same time powers the cam 384 to rotate, since the two ends of the rotating shaft 22 of the cylinder 20 are propped by the two fixing shafts 342, the cam 384 in turn drives the frame 48 to make the entire carrying portion 42 to move axially to and fro along the rotating shaft 22. As a result, the grinding components 50 move along the rotating shaft 22 of the cylinder 20 to and fro and linearly grind the surfaces of the two ends of the rotating shaft 22, thereby achieving back and forth grinding.

It is to be restated that the conventional approach to grinding a cylinder is that workers use abrasive paper to manually grind the axle of the workpiece and tends to cause ragged and/or rough ground surfaces of the cylinder. When such a cylinder (e.g. a rotor shaft) is applied or assembled as a part to a mechanism (e.g. a motor), it is unlikely to fit the surrounding parts well, and the resultant poor combination can generate noise and/or even have adverse effects on the service life of the mechanism. However, the disclosed grinding device 10 uses the movable component 40 to work with the positioning unit 34, the driving unit 36, and the driven unit 38, so as to provide both peripheral and linear grinding to the rotating shaft 22 of the cylinder 20. Thereby, the disclosed grinding device can perform grinding with better quality and lower labor costs, and endows the ground rotating shaft 22 with improved evenness and fineness.

The present invention has been described with reference to the preferred embodiments and it is understood that the embodiments are not intended to limit the scope of the present invention. Moreover, as the contents disclosed herein should be readily understood and can be implemented by a person skilled in the art, all equivalent changes or modifications which do not depart from the concept of the present invention should be encompassed by the appended claims.

Claims

1. A grinding device, for grinding a cylinder that has a rotating shaft, the grinding device comprising: an immovable component, having a positioning unit on which the cylinder is such mounted that the cylinder is rotatable against the rotating shaft;a movable component, having a carrying portion, wherein the movable component is such installed that on the immovable component that the movable component is moveable axially along the rotating shaft, and the carrying portion positionally corresponds to the cylinder; anda grinding component, being installed on the carrying portion and positionally corresponding to a surface of the rotating shaft.

2. The grinding device of claim 1, wherein the immovable component further comprises a carrying surface, and the positioning unit of the immovable component comprises two posts, two fixing shafts, and a positioning space, in which the two posts are installed on the carrying surface, and each of the two fixing shafts is located on one end of one said post, while the positioning space is defined between the two fixing shafts, so that when the cylinder is placed in the positioning space, the two fixing shafts abut against two ends of the rotating shaft of the cylinder, respectively.

3. The grinding device of claim 1, wherein the immovable component further comprises a driving unit that is configured to drive the cylinder to rotate against the rotating shaft.

4. The grinding device of claim 1, wherein the immovable component further comprises a driven unit that is configured to drive the movable component to move axially to and fro along the rotating shaft.

5. The grinding device of claim 1, wherein the carrying portion of the movable component comprises two notches for receiving two ends of the rotating shaft of the cylinder, respectively, and the grinding component is located by the two notches and contacts the two ends of the rotating shaft.

6. The grinding device of claim 5, wherein each of the two notches comprises a clip slot, and the grinding component is received in the clip slots and contacts the surface of the rotating shaft.