JPH10175164A - Sleeve flange type fitting device to fit grinding wheel to spindle of grinder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sleeve flange type fitting device which can wash a groove to house a balance weight easily, and can fix the balance weight without using a steel ball. SOLUTION: A sleeve flange type fitting device 1 to fit a grinding wheel to the spindle of a grinder is composed of a sleeve flange 10 forming a sleeve part 12 and a flange part 11; a push plate 20 fitted to the sleeve part 12 in order to fix a grinding wheel to the flange part 11; a cover fitted to the push plate 20; a balance weight 30 which consists of three balance weights received to the circular recess formed to the push plate 20, and has the first circular arc form side surface 302 and the second circular arc form side surface 304 containing with the side surface at the outer side near the outer peripheral edge of the push plate 20; and a nut 50 screwed to the end of the sleeve part 12, and operates a pressing force to the cover 40.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates generally to a mounting device for mounting a grinding wheel on a spindle of a grinding machine, and more particularly to a sleeve flange type mounting device for mounting a grinding wheel on a spindle of a grinding machine.

[0002]

2. Description of the Related Art There are two types of mounting devices used for mounting a grinding wheel on a spindle of a grinding machine, a straight flange type and a sleeve flange type.

FIGS. 4 and 5 show a conventional sleeve flange type mounting device 7 (hereinafter referred to as "mounting device") for mounting a grinding wheel 80 on a spindle (not shown) of a grinding machine (not shown). Is shown. FIG. 5 shows a cross section of the mounting device 7 along the line 5-5 in FIG. The mounting device 7 includes a sleeve flange 70 in which a flange portion 702 and a sleeve portion 704 are formed. A circular groove 73 for receiving a plurality (three in FIG. 4) of balance weights 74 is formed in the flange portion 702. The grinding wheel 80 is attached to the sleeve flange 70 by a sleeve portion 704 that extends through the grinding wheel and then through the push plate 77 and the nut 78. Nut 78
Is screwed into a threaded portion 782 formed outside the end of the sleeve portion 704, and applies a pressing force to the grinding wheel 80 by the pressing plate 77 so that the grinding wheel 80 is firmly attached to the sleeve flange 70.

[0004] The sleeve flange 70 is further formed with a tapered hole 72 and an internally threaded portion 722 at the center thereof. Therefore, the mounting device 7 connected to the grinding wheel 80 is mounted on the tip of a spindle having a structure corresponding to the mounting device.

Each balance weight 74 is provided with a hole 742 extending in the axial direction of the balance weight. The hole 742 extending in the axial direction has a thread formed in the hole,
A hole 751 that penetrates the hole 742 and is orthogonal to the hole and extends in the radial direction of the balance weight 74. The steel ball 76 is received in a radially extending hole 751 and is in contact with the inner wall of the groove 73. Screw 75 is hole 74
Screw into 2. When the screw 75 is in the state shown in FIG.
2, the front end of the screw 75 has a groove 73
A steel ball 76 is pressed against the inner wall of the balance weight 74 in the radial direction. When the screw 75 is further tightened, the steel ball 76 is pressed against the outer wall of the groove 73 in the radial direction of the balance weight 74 by the screw 75 connected to the balance weight 74. Thus, the balance weight 74 is firmly fixed to the outer wall of the groove 73 so that the balance weight is fixed at a predetermined position. When the screw 75 is turned so that the screw 75 is separated from the steel ball 76,
The fixing of the balance weight 74 is released, and the position of the balance weight 74 can be adjusted along the circular groove 73.

After the grinding wheel 80 has been mounted on the spindle by the mounting device 7, the static and dynamic balance of the mounting device 7 connected to the grinding wheel 80 is checked. Optimal static and dynamic balance of the mounting device 7 connected with the grinding wheel 80 is obtained by adjusting the position of the balance weight 74.

The conventional mounting device 7 for mounting a grinding wheel on a spindle of a grinding machine has the following disadvantages.

When the mounting device 7 has been used recently, it is not substantially difficult to move the balance weight 74 along the groove 73. However, after a certain period of use, grinding or grinding with the grinding wheel 80 generates abrasive grains or dust, which enters the grooves 73, deposits inside the grooves 73 and hardens. The accumulation and hardening of the abrasive grains inside the groove 73 makes it difficult to move the balance weight 74 along the circular groove 73. Therefore,
Before replacing the broken grinding wheel with a new one,
Grooves 73 must be cleaned to remove hardened abrasive particles that have accumulated within the interior. Thereby, the position of the balance weight 74 is readjusted to have an optimal static and dynamic balance for the mounting device 7 connected to the new grinding wheel. The cleaning of the groove 73 is performed by first removing the screw 75 from the steel ball 76 and removing the balance weight 74 from the groove 73. Thus, removing all screws 76 from steel ball 75 is laborious and time consuming.

Further, the abrasive grains enter the holes 751 and are hardened in the gap between the balance weight 74 and the inner wall of the groove 73. Thus, the abrasive grains enter hole 751 and hole 7
Hardening within 51 prevents movement and retention of steel ball 76 in a position that fixes balance weight 74 in place. In this case, it is very difficult to adjust the position of the balance weight 74.

[0010]

Accordingly, it is an object of the present invention to provide an improved sleeve flange type mounting device for mounting a grinding wheel on a spindle of a grinding machine which alleviates or eliminates the above-mentioned problems. It is in.

Another object of the present invention is to provide a sleeve flange type mounting device for mounting a grinding wheel on a spindle of a grinding machine, which can easily clean a groove accommodating a balance weight.

Still another object of the present invention is to provide a sleeve flange type mounting device for mounting a grinding wheel on a spindle of a grinding machine, which can fix a balance weight without using steel balls. According to the present invention,
The problem of the prior art arises in that it is very difficult to adjust the position of the balance weight because the movement of the steel ball is prevented so that the steel ball is held in a position for fixing the balance weight 74 in a predetermined position. Absent.

[0013]

SUMMARY OF THE INVENTION A sleeve flange type mounting apparatus of the present invention includes a flange portion, a sleeve portion protruding from the flange portion and having an externally threaded end, and means for mounting to a spindle. And a circular pressing plate for fixing a grinding wheel to the flange portion, wherein the pressing plate has a first side engaged with the grinding wheel, toward the first side. A second side surface opposite the first side surface having a circular recess toward the bottom surface, a bottom surface located between the first side surface and the second side surface, located near an outer peripheral edge of the push plate; An outer side sloped outward toward the first side and terminating at a first end of the bottom surface, having an intermediate side terminating at a second end of the bottom surface and substantially parallel to the first side; Located almost in the center of the push plate,
A central stepped portion protruding from the push plate, and a first central hole axially passing through the push plate, wherein the sleeve portion extends through the first central hole and the outer The side, bottom, middle side and stepped portions at the center are the second
From the side surface to the first side surface, the first arcuate side surface which is received in the cavity and contacts the outer side surface, near the second side surface of the push plate. A front surface, a rear surface proximate the bottom surface, and a first
A second arcuate side opposite to the arcuate side of
A plurality of arc-shaped balances inclined from front to back such that the distance between the first arc-shaped side and the second arc-shaped side gradually increases from front to back. Weights, a plurality of screws penetrating the balance weights from the front surface to the back surface and applying a pressing force to the bottom surface, and attached to the push plate, and contacting the second arc-shaped side surface of each balance weight It includes a circular cover having an outer peripheral edge, and a nut screwed into an end of the sleeve portion to exert a pressing force on the cover.

[0014]

According to the present invention, since the balance weight is fixed to the depression of the pressing plate by the screw and the cover penetrating the balance weight from the front to the back, the screw and the cover are removed. The balance weight can be easily removed from the depression of the push plate.
For this reason, dust and abrasive grains that accumulate in the depressions of the pressing plate can be easily cleaned. Further, according to the present invention, since the balance weight can be fixed at a predetermined position by the screw and the cover penetrating the balance weight, there is no need to arrange a steel ball inside the balance weight.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIGS. 1 to 3, there is shown a sleeve flange type mounting apparatus 1 (hereinafter referred to as a mounting apparatus) for mounting a grinding wheel 60 on a spindle (not shown) of a grinding machine (not shown) according to the present invention. , Mounting device) is a flange portion 1
1 and a sleeve portion 12 extending from the center and front of the flange portion. The circular push plate 20 is the front part 20
4 having a circular recess 26 in its front face.
And a central stepped portion 22 and a first central portion of the hole 24 penetrating the push plate 20 in the axial direction.
2 and a positioning ridge 25 projecting therefrom. Each of the three balance weights 30 has a screw 32 penetrating the balance weight from the front surface to the rear surface. A second central hole 421 is formed in the circular cover 40, and a large screw hole 5 is formed in the nut 50.
1 is formed.

Outside the end of the sleeve portion 12, each member of the mounting device is mounted together with a grinding wheel 60 on the mounting device 1.
A screw portion used to be screwed into the large screw hole 51 of the nut 50 when assembled is formed. The sleeve flange 10 further has a tapered hole 13 and a small screw hole 14 for mounting the mounting device 1 connected to the grinding wheel 60 to the end of a spindle having a structure corresponding to the mounting device. Have been.

The pressing plate 20 further has a convex portion 21 on the rear surface. The protrusion 21 is formed by the grinding wheel 60 and the mounting device 1.
When it is attached to the grinding wheel, it comes into contact with the grinding wheel 60.

The depression 26 is located near the outer peripheral edge of the push plate 20, is inclined outward toward the back surface of the push plate 20, and has an outer side surface 221 ending at a first end of the bottom surface 262. An intermediate side 264 substantially parallel to the outer side and terminating at a second end of the bottom surface 262, and a central step 22 extending between the intermediate side and the positioning ridge 25. Is formed. Outer side 22
1 is inclined with a first inclination.

Each balance weight 30 has an outer side surface 2.
A first arcuate side 302 having a first radius of curvature substantially the same as the curvature of 21 and a second radius of curvature substantially the same as the curvature of the outer peripheral edge 411 of the cover 40. It is made to have a generally arc shape formed by the second arc side portion 304. Further, the first arc-shaped side portion 302 is provided with a balance weight 3
0 is inclined with a second inclination from the front to the back. The second slope is substantially the same as the first slope defined by the outer side surface 221. The distance between the first arc-shaped side portion 302 and the second arc-shaped side portion 304 is the balance weight 30.
The balance weight 30 is inclined from the front surface to the rear surface so as to gradually increase from the front surface to the rear surface. Second
Is inclined with a third inclination.

The outer peripheral edge 411 of the cover 40 is inclined inward toward the back of the cover 40 with a fourth inclination. The fourth inclination is substantially the same as the third inclination defined by the second arc-shaped side surface portion 304 of each balance weight 30.

When assembling the members of the mounting device 1 together with the grinding wheel 60, first, the sleeve portion 12 of the sleeve flange 10 is passed through a hole in the center portion of the grinding wheel 60, and then the hole in the first center portion of the pressing plate 20. 24, the first arc-shaped side surface 302 of each balance weight contacts the outer side surface 221, and the front surface of the balance weight 30 is the front surface 20 of the push plate 20.
4 and the balance weight 30 is arranged in the recess 26 so that the back surface of the balance weight 30 is located near the bottom surface 262. After that, the cover 40 is moved to the pressing plate 2.
At this time, the side surface formed by the hole 421 in the second central portion of the cover 40 matches the positioning ridge 25, and the outer peripheral edge of the cover 40 has the shape of the second arc of each balance weight 30. It contacts the side surface 304. next,
A nut 50 is screwed into the end of the sleeve portion 12 to apply a pressing force to the cover 40 so that the balance weight 30 can move freely along the recess without disengaging from the recess 26 inside the cover 40.
0, the grinding wheel 60, the pressing plate 20, the balance weight 30, and the cover 40 are connected. Then, the screw 32 of the balance weight 30 is screwed into the bottom surface 262 to apply a pressing force to the bottom surface 262, and the balance weight 30 is attached to the outer side surface 221 of the push plate 20 and the outer peripheral edge 4 of the cover 40.
11 to a position where it is strongly pushed. Finally,
The mounting device 1 assembled with the grinding wheel 60 is mounted on a spindle of a grinding machine, and the static and dynamic balance of the mounting device 1 assembled with the grinding wheel 60 is inspected. Thereby, the position of the balance weight 30 is adjusted until an optimal static and dynamic balance is obtained.

In the present invention, the grinding wheel 60 is broken,
When it is necessary to replace with a new grindstone, the nut 50 is loosened and removed from the sleeve portion. And the present invention
In order to operate the screw 32 passing through the balance weight 30, the cover 4 can be used without being implemented as in the prior art.
0 can be removed from the sleeve portion 12 and the balance weight 30 can be removed from the groove 26. Therefore, dust and abrasive grains deposited on the grooves 26 generated by grinding with the grinding wheel 60 can be easily removed. Furthermore, the present invention does not require the use of steel balls to secure the balance weight 30 in place.
Therefore, according to the present invention, the balance weight 30
The conventional problem that the adjustment of the position of the balance weight 30 is very difficult because the movement of the steel ball to fix the steel ball in a predetermined position is prevented does not occur.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a member constituting a sleeve flange type mounting device for mounting a grinding wheel on a spindle of a grinding machine according to the present invention, as viewed obliquely from the upper front right side.

FIG. 2 is a front view showing a sleeve flange type mounting device when the member shown in FIG. 1 is assembled together with a grinding wheel.

FIG. 3 is a sectional view taken along line 3-3 in FIG. 2;

4 shows a conventional sleeve flange type mounting device for mounting a grinding wheel on a spindle of a grinding machine, FIG.
FIG.

FIG. 5 is a sectional view taken along the line 5-5 in FIG. 4;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Sleeve flange type mounting apparatus 10 Sleeve flange 11 Flange part 12 Sleeve part 20 Circular push plate 22 Central stepped part 24 Center hole 25 Positioning ridge 26 Depression 30 Balance weight 32 Screw 40 Cover 50 Nut 51 Screw hole 204 Push plate front surface 221 Outer side surface 262 Bottom surface 264 Intermediate side surface 302 First arc-shaped side surface 304 Second arc-shaped side surface 411 Outer peripheral edge 421 Second central hole

Claims (4)

[Claims] 1. A sleeve flange type mounting device for mounting a grinding wheel on a spindle of a grinding machine, comprising a flange portion, a sleeve portion projecting from the flange portion and having an externally threaded end portion, and the spindle. A sleeve flange having means for attaching to the
A circular pressing plate for fixing a grinding wheel to the flange portion, wherein the pressing plate has a first side engaged with the grinding wheel, and a circular recess directed to the first side. A second side surface opposite to the first side surface, a bottom surface located between the first side surface and the second side surface, and a first side surface located near an outer peripheral edge of the pressing plate; Having an outer side sloped outward toward and terminating at a first end of the bottom surface, an intermediate side terminating at a second end of the bottom surface and substantially parallel to the first side, A stepped portion at a central portion that is located substantially at a central portion of the push plate and protrudes from the push plate; and a first central portion hole that penetrates the push plate in the axial direction, and the sleeve portion includes the first portion. 1 through the hole in the central portion, the outer side surface, the bottom surface, the intermediate side surface, and the step portion of the central portion Is a first arcuate side surface which cooperates to form a depression from the second side surface of the push plate toward the first side surface and is received by the depression and in contact with the outer side surface. A front surface located near the second side surface of the push plate, a back surface located near the bottom surface, and a second arc-shaped side surface opposite to the first arc-shaped side surface; A plurality of inclining from the front surface to the back surface such that a distance between the first arc-shaped side surface and the second arc-shaped side surface gradually increases from the front surface to the back surface; An arc-shaped balance weight, a plurality of screws penetrating the balance weight from the front surface to the back surface, and applying a pressing force to the bottom surface, and the second weight of the balance weight is attached to the push plate. Outside touching the arc-shaped side A circular cover having an edge, said threaded onto the end of the sleeve portion, the sleeve flange type mounting device comprising a nut for applying a pressing force to said cover. 2. The sleeve flange type mounting device according to claim 1, wherein a convex portion for connecting to a grinding wheel is formed on the first side surface of the pressing plate. 3. The push plate further includes a positioning ridge projecting from the central stepped portion and positioned around the first central hole, and the cover includes a second central hole and the positioning ridge. The mounting device according to claim 1, wherein a side surface provided with the second central hole that fits the positioning ridge is formed. 4. The means for attaching the sleeve flange to the spindle includes a threaded hole located at an end of the sleeve portion, and a tapered hole extending from the threaded hole through the flange portion. 2. The sleeve flange type mounting device according to 1.