JPH0711261U - Grindstone mounting structure - Google Patents

Abstract

(57) [Abstract] [Purpose] An object of the present invention is to provide a whetstone mounting structure that securely mounts a whetstone to a whetstone holder and that includes a balance adjusting mechanism with a simple configuration. [Structure] A groove 18 having a semicircular cross section in the axial direction of the grindstone holder 10.
And a groove 34 having a semicircular cross section is formed in the hole 32 of the grindstone structure 22. Therefore, the grindstone structure 22
The grindstone holder 10 is inserted into the hole 32 of the above, a key hole is formed by making the groove 18 and the groove 34 correspond to each other, and the key 36 is inserted into the key hole, and the disk 38 is attached to the grindstone holder 10 by the bolt 42. To do. Therefore, the key 3
By inserting 6, the rotational force of the grindstone holder 10 is reliably transmitted to the grindstone structure 22, and the key 3
The balance can be adjusted by changing the length of 6 by the key hole.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a structure for mounting a grindstone used in a grinder on a grindstone holder, and more specifically to a grindstone mounting structure that also serves as a balance adjusting mechanism.

[0002]

[Prior art]

 Many techniques have been developed for attaching and balancing the grindstone to the grindstone holder.

In the prior art, there is a method of attaching a grindstone to a grindstone holder with an adhesive. Also, various new techniques have been proposed for balance adjustment. For example, in Japanese Utility Model Laid-Open No. 63-179054, a shaft body is inserted into a spindle for rotating a grindstone, and a disk having a slide groove in which a balance weight slides is formed inside the shaft body. There is disclosed a technical idea that the balance is adjusted by mounting it on a disk and rotating the disc from the outside or by displacing the balance weight in the radial direction.

[0004]

[Problems to be solved by the device]

 However, in the balance adjusting device, since the shaft body is inserted into the spindle and the disk or the like is attached to the tip end portion thereof, the internal structure becomes complicated and the cost of the device increases.

Further, when the grindstone is fixed to the grindstone holder with an adhesive, a gap is created between the grindstone holder and the grindstone, and as a result, the mounting state of the grindstone holder and the grindstone may become unstable. It was

The present invention has been made in order to solve this kind of problem, and the grindstone is mounted to the grindstone holder in a reliable and stable state, and has a simple structure. It is an object of the present invention to provide a grindstone mounting structure including a balance adjusting mechanism that can be manufactured as described above.

[0007]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention has a grindstone holder having a plurality of grooves axially defined in a tip portion, and a first hole portion into which the grindstone holder is fitted. A plurality of grooves corresponding to the grooves of the holder are inserted into the grindstone structure defined in the hole, and the second hole defined by the groove of the grindstone structure and the groove of the grindstone holder. , A key of which the same or different lengths are selectively used, and a mounting means for fixing the key and the grindstone structure to each other.

Further, it is preferable that the mounting means is a plate body that is brought into contact with the end portion of the second hole portion and mounted on the grindstone holder.

Further, it is preferable that the key has a bent portion, and the bent portion is sandwiched between the plate body and the grindstone holder.

[0010]

[Action]

 The grindstone holder is fitted into the first hole portion of the grindstone structure, the grooves defined in the grindstone holder and the first hole portion of the grindstone structure are made to correspond to each other, and the key is formed in the second hole portion defined thereby. Insert. Further, by the mounting means, for example, by mounting the plate body in contact with the end portion of the second hole portion on the grindstone holder, it is possible to prevent the key from falling out of the second hole portion. As a result, the key engages with the respective grooves of the grindstone holder and the first hole of the grindstone structure, and the rotational force of the grindstone holder is surely transmitted to the grindstone structure. At this time, the balance can be adjusted by selectively changing the lengths of the keys to be inserted into the plurality of second holes for each second hole.

If the key is provided with a bent portion and the bent portion is sandwiched between the grindstone holder and the plate, it is possible to prevent the key from being displaced in the second hole portion due to the rotation operation.

[0012]

【Example】

 BEST MODE FOR CARRYING OUT THE INVENTION A grindstone mounting structure according to the present invention will be described in detail below with reference to the accompanying drawings, with reference to preferred embodiments.

First, a grindstone mounting structure according to the first embodiment will be described with reference to FIGS. 1 and 2.

As shown in FIG. 1, the grindstone holder 10 has a thin cylindrical portion 14 formed at the tip of the bulging portion 12. A plurality of grooves 18 each having a semicircular cross section are formed on the side surface of the cylindrical portion 14 at regular intervals in the circumferential direction from the tip end plane 16 by a predetermined distance in the axial direction. A screw hole 20 is formed in the axial center of the tip end flat surface 16.

The grindstone structure 22 mounted on the grindstone holder 10 has a substantially hemispherical shape. As shown in FIG. 2, a metal member 24 is formed inside and a grindstone body 26 is formed on the surface portion thereof. ing. A recess 28 is formed on the top of the grindstone structure 22, and a hole 32 having a diameter smaller than that of the recess 28 is formed on the bottom surface 30 of the recess. A plurality of grooves 34 having a semicircular cross section corresponding to the grooves 18 of the grindstone holder 10 are formed on the inner peripheral surface of the hole portion 32 so as to communicate with the bottom surface 30 over a predetermined length.

The key 36 inserted in the hole formed by the groove 18 and the groove 34 is a cylindrical body made of the same material, but the length of the key 36 inserted by the hole is changed. And it plays a balance adjustment function.

A hole 40 is defined in a central portion of the disk 38 that is in contact with the bottom surface 30, and a bolt 42 can be inserted into the hole 40.

In the above-described grindstone mounting structure, the grindstone structure 22 is mounted on the grindstone holder 10 as follows.

That is, the cylindrical portion 14 of the grindstone holder 10 is fitted into the hole 32 of the grindstone structure 22 by tightening or press fitting. As a result, the grindstone structure 22 contacts the bulging portion 12 of the grindstone holder 10. In this case, the tip end flat surface 16 of the cylindrical portion 14 and the bottom surface 30 of the grindstone structure 22 are aligned.

Next, the groove 18 of the grindstone holder 10 and the groove 34 of the hole 32 are aligned. As a result, the groove 18 and the groove 34 form a hole having a circular cross section (hereinafter referred to as a key hole), and the key 36 is inserted into the key hole.

Further, the disk 38 is inserted into the recess 28 of the grindstone structure 22, and is brought into contact with the tip end flat surface 16 of the grindstone holder 10 and the bottom surface 30 of the grindstone structure 22. Therefore, the disk 38 is fixed to the grindstone holder 10 by screwing the bolt 42 into the screw hole 20 of the grindstone holder 10. As a result, the key 36 inserted into the key hole portion is prevented by the disc 38 from falling out of the key hole portion.

In the grindstone mounting mechanism configured as described above, the cylindrical portion 14 of the grindstone holder 10 is inserted into the hole 32 of the grindstone structure 22, and the disc 38 is screwed onto the grindstone holder 10. The key formed by the groove 18 defined in the cylindrical portion 14 of the grindstone holder 10 and the groove 34 defined in the hole 32 of the grindstone structure 22 while the grindstone structure 22 is mounted on the grindstone holder 10. By inserting the key 36 into the hole, the rotational force of the grindstone holder 10 can be reliably transmitted to the grindstone structure 22.

Further, the balance can be adjusted by changing the length of the key 36 inserted into the key hole portion in each hole portion. For example, as shown in FIG. 2, the eccentricity amount can be adjusted by changing the lengths of the keys 36a and 36b. That is, in the present embodiment, the keys 36 used in the grindstone mounting structure have different lengths, that is, a balance adjusting function is provided by using the key 36 as a material for eccentricity to provide a balance adjusting mechanism. The structure is simpler than that of.

Next, a grindstone mounting structure according to the second embodiment will be described with reference to FIGS. 3 and 4. The same components as those in the first embodiment are designated by the same reference numerals, and detailed description thereof will be omitted.

As shown in FIG. 3, a groove 50 having a quadrangular cross section is formed from the groove 18 toward the screw hole 20 on the flat surface 16 of the tip of the grindstone holder 10. Further, the key 52 is provided with a bulging portion 56 having a quadrangular cross section which extends from the end portion of the cylindrical portion 54 in a right angle direction, and is formed in an L shape as a whole.

At the time of assembly, similarly to the first embodiment, the cylindrical portion 14 of the grindstone holder 10 is fitted into the hole 32 of the grindstone structure 22 by interference fitting or press fitting so that the groove 18 and the groove 34 correspond to each other. Let Therefore, the cylindrical portion 54 of the key 52 is inserted into the key hole formed by the grooves 18 and 34, and the bulging portion 56 is fitted into the groove 50 of the flat surface 16 of the tip end portion of the cylindrical portion 14 of the grindstone holder 10. . Therefore, the bulging portion 56 does not protrude from the tip end flat surface 16. Subsequently, when the disk 38 is attached to the grindstone holder 10 with the bolt 42, the disk 38 comes into contact with the bottom surface 30 of the grindstone structure 22, the tip end flat surface 16 and the bulging portion 56.

That is, the same effect as that of the first embodiment is obtained, and the bulging portion 56 of the key 52 is sandwiched between the groove 50 of the flat surface 16 of the tip end portion 16 of the grindstone holder 10 and the disc 38. Even when the wheel 10 and the grindstone structure 22 are rotating, the key 52 is preferably prevented from axially displacing in the key hole portion.

[0028]

EFFECTS OF THE INVENTION According to the grindstone mounting structure of the present invention, the following effects can be obtained.

That is, the grindstone holder is fitted in the first hole of the grindstone structure, and the defined grooves are made to correspond to the grindstone holder and the first hole of the grindstone structure, respectively. Insert the key into the second hole. Further, by mounting a plate body that abuts against the tip surface of the grindstone holder and the tip surface of the grindstone structure to the grindstone holder, the second hole is blocked and the key is prevented from falling out of the second hole. . As a result, the key engages with the respective grooves of the grindstone holder and the first hole portion of the grindstone structure, and the rotational force of the grindstone holder is reliably and stably transmitted to the grindstone structure. At this time, the balance can be adjusted by selectively changing the lengths of the keys to be inserted into the plurality of second holes for each second hole.

That is, by inserting a key into the second hole formed by the groove of the grindstone structure and the groove of the grindstone holder, the grindstone structure is attached to the grindstone holder so that the rotational force can be reliably transmitted. By adjusting the length of the key selectively for each second hole, the key is also used as a balance weight, and the whetstone with a simple structure and a balance adjusting function can be mounted. Realized the structure.

If the key is provided with a bent portion and the bent portion is sandwiched between the grindstone holder and the plate, it is possible to prevent the key from being displaced in the second hole due to the rotation operation.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a grindstone mounting structure according to an embodiment of the present invention.

FIG. 2 is an explanatory sectional view showing a grindstone mounting structure according to an embodiment of the present invention.

FIG. 3 is an exploded perspective view showing a grindstone mounting structure according to another embodiment of the present invention.

FIG. 4 is a cross-sectional view showing a grindstone mounting structure according to another embodiment of the present invention.

[Explanation of symbols]

10 ... Whetstone holder 18, 34, 5
0 ... Groove 16 ... Tip plane 22 ... Grindstone structure 30 ... Bottom 32 ... Hole 36, 52 ... Key

Claims (3)

[Scope of utility model registration request] 1. A grindstone holder having a plurality of grooves axially defined in a tip portion, and a first hole portion into which the grindstone holder is fitted, and a plurality of grindstone holders corresponding to the grooves of the grindstone holder. The groove is inserted into the second hole defined by the grindstone structure defined in the first hole, and the groove of the grindstone structure and the groove of the grindstone holder, and has the same or different length. A whetstone mounting structure comprising: a key for selectively using the above item; and a mounting means for fixing the key to the whetstone structure. 2. The mounting structure for a grindstone according to claim 1, wherein the mounting means is a plate body that is in contact with the end of the second hole and mounted on the grindstone holder. 3. The mounting structure according to claim 2, wherein a bent portion is formed on the key, and the bent portion is sandwiched between the plate body and the grindstone holder.