ANGLE ADJUSTMENT DEVICE FOR GRINDING MACHINE

Abstract

A grinding machine includes a base with a U-shaped frame on the base. The U-shaped frame has two extensions and each have a first hole and a second hole which is an oval hole. A grinding roller is connected to the frame. An adjustment device includes a first shaft and a second shaft. The first shaft extends through a portion of the base and the two respective first holes of the extensions. The second shaft extends through the second holes of the two extensions. An eccentric sleeve and an adjustment member are located in the second hole of one of the extensions, and each have an eccentric hole. The adjustment member is mounted to the eccentric sleeve. The second shaft extends through the two eccentric holes. When rotating the adjustment member and the eccentric sleeve, the frame and the grinding roller are pivoted about the first shaft.

Description

BACKGROUND OF THE INVENTION

1. Fields of the Invention

The present invention relates to an adjustment device, and more particularly, to an adjustment device for adjustment of an angle of a grinding roller of a grinding machine.

2. Descriptions of Related Art

The conventional grinding machine is disclosed in FIG. 1 and generally comprises a base 1 with a feeding platform 2 located on the base 1, and a grinding roller 3 is located above the feeding platform 2 so as to form a space 5 between the grinding roller 3 and the feeding platform 2. A frame 4 is connected to the feeding platform 2 and located on one end of the grinding roller 3. The feeding platform 2 is parallel to the grinding roller 3. An object (not shown) is fed from the feeding platform 2 and positioned in the space 5, so that the grinding roller 3 is lowered to grind the surface of the object. The space 5 has to be set according to the size of the object to he ground so as to obtain a flat and smooth surface on the object.

However, the frame 4 is connected to one end of the grinding roller 3 which becomes a cantilever structure, and the grinding roller 3 may tilt after a period of time of use. Therefore, the feeding platform 2 is not parallel to the grinding roller 3, and the tilt grinding roller 3 cannot grind a flat and smooth surface on the object. The user has to adjust the grinding roller 3 frequently.

The present invention intends to provide an adjustment device for adjusting the grinding roller of a grinding machine, so as to improve the shortcomings mentioned above.

SUMMARY OF THE INVENTION

The present invention relates to an adjustment device for a grinding machine, and comprises a base and a U-shaped frame is located on the top of the base. The U-shaped frame has a first extension and a second extension, each of the first and second extensions has a first hole and a second hole which is an oval hole. Two tubular members are located on the base, and the first and second extensions are mounted to two respective outsides of the two tubular members. A feeding platform is located on the base. A grinding roller is transversely connected to the frame.

An adjustment device is connected to the frame and has a first shaft and a second shaft. The first shaft has a fixing end and an operation end. The fixing end of the first shaft extends through the tubular member and the first hole of the second extension. The operation end of the first shaft extends through the other tubular member and the first hole of the first extension. The second shaft has an elongate body which has a restriction end and a connection end which extends through the second hole of the second extension, the two tubular members and the second hole of the first extension. The restriction end is sized larger than the second hole of the second extension. The connection end extends beyond the second hole of the first extension. An eccentric sleeve is located in the second hole of the first extension and has a first eccentric hole defined axially therethrough. An adjustment member has a second eccentric hole defined axially therethrough. The eccentric sleeve securely extends through the second eccentric hole. The adjustment member is engaged with the second hole of the first extension. When rotating the adjustment member and the eccentric sleeve, the frame and the grinding roller are pivoted about the first shaft.

The primary object of the present invention is to provide an adjustment device for a grinding machine, the transverse grinding roller is adjusted an angle relative to the feeding platform by rotating the adjustment member and the eccentric sleeve. The frame and the grinding roller are pivoted about the first shaft so as to ensure that the object to be ground has a flat and smooth surface.

The present invention will become more obvious from the following description when taken in connection with the accompanying drawings which show, for purposes of illustration only, a preferred embodiment in accordance with the present invention.

BRIEF DESCRIPTION OF TI IE DRAWINGS

FIG. 1 is a side view to show a conventional grinding machine;

FIG. 2 is a perspective view to show the grinding machine with the adjustment device of the present invention;

FIG. 3 shows the fixing board connected to the first and second shaft of the adjustment device;

FIG. 4 is an exploded view to show the adjustment device of the present invention;

FIG. 5 is a cross sectional view of a portion of the adjustment device of the present invention;

FIG. 5 a shows a wrench is used to clamp the two flat faces of the eccentric sleeve;

FIG. 6 shows an end cross sectional view of the eccentric sleeve, the adjustment member and the second shaft in the second hole of the frame;

FIG. 7 shows that the grinding roller is tilt relative to the feeding platform, and

FIG. 8 shows that the grinding roller is adjusted and parallel to the feeding platform.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

Referring to FIGS. 2 to 6, the adjustment device for a grinding machine of the present invention comprises a base 10 and a U-shaped frame 20 is located on the top of the base 10. The U-shaped frame 20 has a first extension 21 and a second extension 210. Each of the first and second extensions 21, 210 has a first hole 51 and a second hole 52, and each of the second holes 52 is a non-circular hole. In this embodiment, each of the second holes 52 is an oval hole. Two tubular members are connected to the top of the base 10, and the first and second extensions 210 are mounted to two respective outsides of the two tubular members. A feeding platform 30 is located on the base 10. A grinding roller 40 is transversely connected to the frame 20 so that an object is put on the feeding platform 20 and positioned to a desired position where the grinding roller 40 grinds the object.

An adjustment device 50 is connected to the frame 20 and has a first shaft 53 and a second shaft 54. The first shaft has a fixing end 531 and an operation end 532. The fixing end 531 of the first shaft 53 extends through the tubular member and the first hole 51 of the second extension 210. The operation end 532 of the first shaft 53 extends through the other tubular member and the first hole 51 of the first extension 21. A first urging member 533 is connected to the operation end 532 extending beyond the first hole 52 of the first extension 21.

The second shaft 54 has an elongate body 541 which has a restriction end 544 and a connection end 545. The connection end 545 extends through the second hole 52 of the second extension 210, the two tubular members and the second hole 52 of the first extension 21. The restriction end 544 is sized larger than the second hole 52 of the second extension 210 so that the second shaft 54 does not drop from the second hole 52 of the second extension 210. The fixing end 531 of the first shaft 53 may have a larger end to prevent it from dropping from the second hole 52 of the second extension 210. The connection end 545 of the second shaft 54 extends beyond the second hole 52 of the first extension 21.

An eccentric sleeve 542 is located in the second hole 52 of the first extension 21 and has a first eccentric hole 5421 defined axially therethrough. The eccentric sleeve 542 has two flat faces 5423 defined in the outside thereof. An adjustment member 543 has a second eccentric hole 5431 defined axially therethrough. The eccentric sleeve 542 securely extends through the second eccentric hole 5431 of the adjustment member 543. The eccentric sleeve 542 has a radial hole 5422 which communicates with the first eccentric hole 5421. A bolt 55 threadedly extends through the radial hole 5422 and contacts against the elongate body 541. The adjustment member 543 is engaged with the second hole 52 of the first extension 21. The connection end 545 of the second shaft 54 has outer threads 547 which are threadedly connected to a second urging member 546. The adjustment member 543 has a lever 5432 extending therefrom.

As shown in FIG. 7, after the grinding machine is assembled, the grinding roller 40 is not parallel to the feeding platform 30 because of the accumulated tolerances. The assembler loosens the bolt 55 and the first urging member 533, and uses a wrench to clamp the two flat faces 5423 of the eccentric sleeve 542 as shown in FIG. 5a. The eccentric sleeve 542 is rotated relative to the elongate body 541 and drives the adjustment member 543 and the second hole 52 of the first extension 21 of the U-shaped frame 20, so that the U-shaped frame 20 is pivoted about the first shaft 53. Therefore, the grinding roller 40 is adjusted relative to the feeding platform 30 to be parallel to the feeding platform 30 as shown in FIG. 8. The bolt 55 is then tightened again, and a scale device is connected to the adjustment member 543 which is set at a desired position according to the scale device. The customers or users can also rotate the eccentric sleeve 542 to initialize the position of the grinding roller 40, and by operating the first and second urging members 533, 546 to set the desired position and height of the grinding roller 40.

When the users wants to adjust the grinding roller 40 after a period of time of use, the first and second urging members 533, 546 are loosened, and the adjustment member 543 is rotated by operating the lever 5432 to rotate the adjustment member 543 relative to the eccentric sleeve 542, in the meanwhile, the eccentric sleeve 542 does not rotate. The adjustment member 543 drives the second hole 52 of the first extension 21 and the U-shaped frame 20 is pivoted about the first shaft 53 so as to adjust the grinding roller 40 to be parallel to the feeding platform 30 as shown in FIG. 8 again.

It is noted that the restriction end 544 is sized larger than the second hole 52 of the second extension 210 so that the second shaft 54 does not drop from the second hole 52 of the second extension 210. The fixing end 531 of the first shaft 53 has a large end to prevent it from dropping from the second hole 52 of the second extension 210. As shown in FIG. 3, the fixing board 57 is connected between the fixing end 531 of the first shaft 53 and the restriction end 544 of the second shaft 54 so as to securely position the first and second shaft 53, 54 to the U-shaped frame 20, such that one end of the grinding roller 40 can be adjusted.

While we have shown and described the embodiment in accordance with the present invention, it should be clear to those skilled in the art that further embodiments may be made without departing from the scope of the present invention.

Claims

1. An adjustment device for a grinding machine, comprising: a base;a U-shaped frame located on a top of the base having a first extension and a second extension, each of the first and second extensions having a first hole and a second hole, each of the second holes being a non-circular hole, two tubular members on the base, the first and second extensions mounted to two respective outsides of the two tubular members;a feeding platform located on the base;a grinding roller transversely connected to the frame, andan adjustment device connected to the frame and having a first shaft and a second shaft, the first shaft having a fixing end and an operation end, the fixing end of the first shaft extending through the tubular member and the first hole of the second extension, the operation end of the first shaft extending through the other tubular member and the first hole of the first extension, the second shaft having an elongate body which has a restriction end and a connection end, the connection end extending through the second hole of the second extension, the two tubular members and the second hole of the first extension, the restriction end being sized larger than the second hole of the second extension, the connection end extending beyond the second hole of the first extension, an eccentric sleeve located in the second hole of the first extension and having a first eccentric hole defined axially therethrough, an adjustment member having a second eccentric hole defined axially therethrough, the eccentric sleeve securely extending through the second eccentric hole, the adjustment member engaged with the second hole of the first extension.

2. The adjustment device as claimed in claim 1, wherein the eccentric sleeve has two flat faces defined in an outside thereof.

3. The adjustment device as claimed in claim 1 wherein a first urging member connected to the operation end extending beyond the first hole of the first extension, the connection end of the second shaft has outer threads which are threadedly connected to a second urging member.

4. The adjustment device as claimed in claim 1, wherein the eccentric sleeve has a radial hole which communicates with the first eccentric hole, a bolt threadedly extends through the radial hole and contacts against the elongate body.

5. The adjustment device as claimed in claim 1, wherein the adjustment member has a lever extending therefrom.

6. The adjustment device as claimed in claim 1, wherein the adjustment device has a fixing board which is located between the fixing end of the first shaft and the restriction end of the second shaft.

7. The adjustment device as claimed in claim 1, wherein the two second holes each are an oval hole.