JPH039975Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an improvement in the structure for attaching a grindstone to a grindstone holder in a rotary polishing grindstone.

Rotary polishing whetstones are used to polish the surface of stones, etc., and these rotary polishing whetstones have a whetstone holder attached to the tip of the rotating shaft. The grindstone is mounted on this grindstone holder. However, when polishing stones, etc. using such a rotary grinding wheel, the grinding wheel is subject to severe wear and needs to be replaced frequently. If it takes time to attach the grindstone, the work efficiency will decrease accordingly, so if possible, it would be ideal to be able to attach the grindstone to the grindstone holder with a single touch.

As a means for this purpose, for example, 1981 Utility Model Publication No. 8562 and 1988 Utility Model Publication No.
There is one described in Publication No. 55845,
All of these are made by press-fitting the polygonal shaft of the grindstone into the polygonal hole formed in the holder.
At the same time as the grindstone is mounted on the grindstone holder, rotational drive is transmitted to the grindstone through the polygonal hole.

However, when the whetstone is attached to the whetstone holder using a combination of a polygonal hole and a polygonal shaft, the whetstone holder and whetstone are fixed in a completely integrated manner. When polishing is performed with the grinding wheel surface placed diagonally relative to the surface to be polished, force is applied to the polygonal support shaft from an unnatural direction. As a result, there is a risk that the support shaft itself may break, and the force applied from such an unnatural direction may cause the support shaft to wear out and create a gap between it and the polygonal hole. In this case, smooth driving is hindered and the grinding wheel is caused to run out. In particular, if the support shaft breaks while being press-fitted into the polygonal hole, it is difficult to remove the broken residue.

This idea allows the attachment of the whetstone to the whetstone holder.
By interposing an elastic ring and configuring the drive to be transmitted to the grinding wheel by meshing the concave portion and the protrusion, the above-mentioned problems found in conventional configurations can be overcome. This is an attempt to eliminate such drawbacks.

The structure for attaching a whetstone to a whetstone holder according to this invention will be explained based on the drawings.A support shaft 4 is formed at the lower center of the whetstone holder 2, while a support shaft 4 is formed at the upper center of the whetstone 5. A hole 6 having an inner diameter larger than the outer diameter is formed, and the support shaft 4
is inserted into the hole 6, the support shaft 4
An elastic ring 7 having an outer diameter slightly larger than the inner diameter of the hole 6 is interposed in the gap between the hole 6 and the hole 6. The protrusion 3 formed on the lower part is connected to the recess 8 formed on the upper part of the grindstone 5.
The structure is such that this is done by multiplying the

That is, the grindstone holder 2 is
As shown in the figure, it has an umbrella shape with sloped upper and lower surfaces, and a screw hole 9 is formed in the center of the upper surface for attachment to the rotating shaft 10 of the polishing machine. In addition, a support shaft 4 is formed in the center of the lower surface, and a protrusion 3 is formed around the support shaft 4.Furthermore, near the tip of the support shaft, Support shaft 4
Elastic ring 7 having an outer diameter larger than the outer diameter of
However, the structure is such that it is attached by being fitted onto the support shaft 4.

As shown in FIG. 2, the whetstone 5 has an upper surface that is
It has an inclined surface corresponding to the shape of the lower surface of the whetstone holder 2, and the lower part thereof has a skirt shape that is slightly expanded.In the center of the upper surface, there is a slope slightly larger than the outer diameter of the support shaft 4. , ring 7
A hole 6 having an inner diameter slightly smaller than the outer diameter of the grinding wheel holder 2 is formed around the hole 6. The structure is such that recesses 8 are formed.

The whetstone holder 2 and whetstone 5 for carrying out this invention have the above-mentioned constructions, but when used, they are attached as shown in FIGS. 4 to 6.

That is, to attach the whetstone 5 to the whetstone holder 2, insert the support shaft 4 of the whetstone holder 2 into the hole 6 formed at the center of the upper surface of the whetstone 5, and
The protrusions 3 of the whetstone holder 2 are connected to the recesses 8 of the whetstone 2.
However, when polishing is performed with the whetstone surface parallel to the surface to be polished, as shown in Figure 4. , the entire upper edge of the whetstone 5 is in contact with the lower surface of the whetstone holder 2, and as shown in FIG. 6, the whetstone surface is oblique to the surface to be polished. When performing polishing work under such conditions, as shown in FIG. It will be destroyed.

In addition, in any of these cases, the support shaft 4
As a result of the configuration in which an elastic ring 7 having a shape larger than the inner diameter of the hole 6 formed in the grinding wheel 5 is arranged on the outer periphery of the grinding wheel 5, there is no risk of the grinding wheel 5 falling off from the grinding wheel holder 2. It is.

In the above, as a means for implementing the structure for attaching the whetstone 5 to the whetstone holder 2 according to this invention, the support shaft 4 and the protrusion 3 are formed at the lower center of the whetstone holder 2, and the upper surface of the whetstone 5 is In this case, a hole 6 and a recess 8 are formed in the upper surface of the grindstone 5. However, as another embodiment of the grindstone holder 2 and the grindstone 5, as shown in FIG. 7 and FIG. It is also possible to form a support shaft 4 to which an elastic ring 7 is attached, and also form a hole 6 in the center of the lower surface of the grindstone holder 2. It is also possible to form a recess 8 on the upper surface of the grinding wheel holder 2 and a recess 8 for fitting the protrusion 3 on the lower surface of the grindstone holder 2. As another embodiment for interposing the elastic ring 7 in the gap, a groove may be formed in the wall of the hole 6, and the elastic ring 7 may be fitted into the groove.

The structure for attaching the grindstone 5 to the grindstone holder 2 according to this invention has the above-mentioned structure and has the following effects.

In other words, when polishing the surface of stone, etc., the grinding wheel is severely worn and requires frequent replacement. This can be done by simply inserting the whetstone 5 into the whetstone holder 2, and at the same time, since the attached whetstone 5 is supported by the elastic ring 7, the whetstone 5 is This makes it possible to prevent a situation in which it would fall off from the holder 2.

In addition, in the case of so-called oblique grinding, in which the grinding wheel surface is arranged diagonally with respect to the surface to be polished, the engaged state of the grinding wheel holder 2 and the grinding wheel 5 is as shown in FIG. As the lower edge of the holder 2 is constantly pressed against the upper edge of the grinding wheel 5, it is possible to transmit a strong pressing force of the grinding wheel 5 to the surface to be polished. Even if
No excessive force is applied to the fitting part between the whetstone holder 2 and the whetstone 5, which prevents damage to the whetstone 5 during operation.Furthermore, the rotation of the whetstone 5 by the whetstone holder 2 is As a result, the drive mechanism becomes as if it were driven by a universal joint, and smooth drive transmission can be achieved. Even in the case of oblique sharpening, there is an advantage that good polishing work can be performed without causing any wobbling of the grindstone 5.

[Brief explanation of the drawing]

The attached drawings show one embodiment of this invention, in which Fig. 1 is a perspective view showing the state in which the grindstone is attached to the grindstone holder, and Fig. 2 is a perspective view showing the state in which the grindstone holder and the grindstone are combined. FIG. 3 is a perspective view showing the shape of the lower surface of the whetstone holder;
Figure 4 is a longitudinal cross-sectional view showing how the whetstone is attached to the whetstone holder, Figure 5 is a front view showing how the whetstone is attached to the whetstone holder when performing diagonal sharpening, and Figure 6 is a vertical cross-sectional view showing how the whetstone is attached to the whetstone holder when performing diagonal sharpening. FIG. 7 is a vertical cross-sectional view showing the engagement state of the grindstone holder and the grindstone when carrying out the process, and FIG. 8 is a perspective view showing another embodiment of the grindstone holder.
The figure is a perspective view showing another implementation of the grindstone. 2... Grindstone holder, 3... Protrusion, 4... Support shaft, 5... Grindstone, 6... Hole, 7... Elastic ring, 8... Recess.

Claims (1)

[Scope of utility model registration request] As a means for attaching the whetstone 5 to the whetstone holder 2, either the support shaft 4 or the hole 6 is formed in the lower center of the whetstone holder 2, and the support shaft 4 or the hole 6 is formed in the upper center of the whetstone 5. When either the hole 6 has an inner diameter larger than the outer diameter of the grinding wheel holder 4 or the support shaft 4 has an outer diameter smaller than the inner diameter of the hole 6 of the grindstone holder 2, and the support shaft 4 is inserted into the hole 6, In this case, an elastic ring 7 having an outer diameter slightly larger than the inner diameter of the hole 6 is interposed in the gap between the support shaft 4 and the hole 6, and the grindstone 5 is rotated by the grindstone holder 2. The projection 3 formed on the lower part of the whetstone holder 2 or the top of the whetstone 5 transmits the transmission.
A mounting structure for a grinding wheel, characterized in that the structure is formed so that the mounting structure can be mounted by fitting into a recess 8 formed in a lower part of the grindstone.