JPH05154762A - Grinding wheel holder with torque transfer function - Google Patents

Abstract

PURPOSE:To surely transfer the rotational torque to a grinding wheel shaft by providing a taper hole couplable with the taper shaft section of the grinding wheel shaft and the spline teeth engageable with the spline teeth formed on the grinding wheel shaft. CONSTITUTION:The coupling between the taper shaft section 3 of a grinding wheel shaft 2 and the taper hole of a main flange 8 mainly serves as the centering of a grinding wheel holder 7. The engaging between the spline teeth 6 of the grinding wheel shaft 2 and the spline teeth 22 of a sub-flange 12 serves as the transmission function of the rotational torque of the grinding wheel shaft 2 by the activation of a grinding/cutting machine 1, and the rotation of the grinding wheel shaft 2 is surely transmitted to a grinding wheel 10 side. The replacing work of the grinding wheel shaft 2 can be simply performed.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial field of application> The present invention is attached to a grindstone shaft of a grinding machine, a cutting machine, or the like (for example, a grinding and cutting machine) that grinds or cuts a work. It is related to the grindstone holder.

<Prior Art> Conventionally, this type of grindstone holder is usually provided with a taper hole that can be fitted into the taper shaft portion of the grindstone shaft of the grinding and cutting machine, and the taper hole is provided in the taper shaft portion of the grindstone shaft. After mating, they are fixed to the wheel spindle using mounting bolts or nuts. A grindstone holder having such a tapered hole is disclosed, for example, in Japanese Utility Model Publication No. 62-12539, Japanese Patent Application Laid-Open No. 58-186560.

<Problems to be Solved by the Invention> In the above-described conventional grindstone holder, the rotational torque of the grindstone shaft of the grinding and cutting machine is transmitted to the grindstone side by the pressure contact relationship between the taper shaft portion of the grindstone shaft and the taper hole.

 Therefore, it is necessary to securely tighten the mounting bolts or nuts.If the tightening is loose, or if the tightening becomes loose during grinding and cutting, the transmission efficiency of the rotational torque is reduced, There was a problem that the torque was not transmitted. In particular, in recent years, when a large grindstone is used due to the high performance of the cutting machine, a large tightening force is required for tightening the mounting bolt or nut. In some cases, the rotational torque transmission due to the fitting with the tapered hole was not satisfactory.

 In some cases, key means is interposed between the grindstone shaft and the grindstone holder, but in this case, it is difficult to assemble the grindstone holder via the key, and the replacement work is complicated.

 Therefore, an object of the present invention is, in view of the above-mentioned problems in the conventional technology, a grindstone holder capable of reliably transmitting the rotational torque of the grindstone shaft and easily performing a replacement work for the grindstone shaft. To provide.

<Means for Solving Problems> The present invention for solving the problems in the above-mentioned conventional techniques is a grindstone holder that holds a grindstone and is detachably attached to a grindstone shaft of a grinding and cutting machine, The gist of the configuration is to have a taper hole that can be fitted in a tapered taper shaft portion of the grindstone shaft and a spline tooth that can mesh with a spline tooth formed in the grindstone shaft.

<Operation> According to the above means, the taper hole of the grindstone holder is fitted into the taper shaft portion of the grindstone shaft for centering, and at the same time, the spline teeth mesh with each other, so that the grindstone shaft The rotation torque is reliably transmitted to the grindstone side.

<Example> An example of the present invention will be described below with reference to the drawings. In FIG. 1, which is a plan view in which a grindstone holder attached to a grindstone shaft is partially broken, a grinder / cutting machine 1 such as a grinder or a cutting machine includes a grindstone shaft 2 that is positively rotated. Then, the grindstone shaft 2 is formed with a tapered taper shaft portion 3 at its tip portion, and a proper number (two in the figure) of mounting bolt screw holes 4 is formed on the tip surface thereof. A flange portion 5 is formed adjacent to the base end side of the tapered shaft portion 3, and external tooth-like spline teeth 6 are formed on the outer peripheral surface of the flange portion 5 (see FIGS. 2 and 1). (See Figure 5).

 Next, the grindstone holder 7 removably attached to the grindstone shaft 2 of the grinding and cutting machine 1 will be described in detail (see FIGS. 1 to 4).

 The grindstone holder 7 holds a main flange 8 having a taper hole 9 which can be fitted in the taper shaft portion 3 of the grindstone shaft 2 of the grinding and cutting machine 1 and a disc-shaped grindstone 10 between the main flange 8. It is mainly composed of a sub flange 12 which is attached by an appropriate number (six in the figure) of fastening bolts 11. In addition, between the both flanges 8 and 12, a proper number (4 in the figure) of detent pins 14 that penetrate the detent holes 13 of the grindstone 10 are installed.

 On the outer end surface of the main flange 8, a disc-shaped fixing plate 15 is attached by an appropriate number (two in the figure) of fixing bolts 16. The fixing plate 15 is provided with an insertion hole 17 corresponding to the screw hole 4 of the grindstone shaft 2, and a mounting bolt 18 passed through the insertion hole 17 is screwed into the screw hole 4. Thus, the grindstone holder 7 is attached to the grindstone shaft 2. At the time of this attachment, the head portion of the fastening bolt 11 is housed in the recess 5a formed on the outer surface of the flange portion 5 of the grindstone shaft 2.

 A flange-shaped clamp portion 19 is integrally formed at the tip of the main flange 8. The clamp portion 19 is clamped by a clamp arm 20 of a grindstone exchanging device (not shown), so that the grindstone holder 7 is attached / detached to / from the grindstone shaft 2 by the clamp. The grindstone changing device is arranged in front of the grindstone shaft 2 of the grinding and cutting machine 1.

 An annular ring portion 21 is integrally formed on the outer surface of the sub-flange 12.

Internal ring-shaped spline teeth 22 are formed on the inner peripheral surface of the ring portion 21. The spline teeth 22 are meshed with the spline teeth 6 of the grindstone shaft 2.

 When the above-mentioned grindstone holder 7 is attached to the grindstone shaft 2 of the grinder / cutting machine 1, the tapered shaft portion 3 of the grindstone shaft 2 of the grinder / cutting machine 1 is fitted into the tapered hole 9 of the main flange 8 to provide the core. At the same time as the extension, the spline teeth 6 of the grindstone shaft 2 are meshed with the spline teeth 22 of the sub-flange 12. Then, the mounting bolt 18 is screwed into the screw hole 4 of the grindstone shaft 2 through the insertion hole 17 of the fixing plate 15, so that the grindstone holder 7 is mounted on the grindstone shaft 2.

 Therefore, the fitting between the tapered shaft portion 3 of the grindstone shaft 2 and the tapered hole 9 of the main flange 8 mainly functions as the centering of the grindstone holder 7. Further, the meshing between the spline teeth 6 of the grindstone shaft 2 and the spline teeth 22 of the sub-flange 12 serves to transmit the rotational torque of the grindstone shaft 2 when the grinding and cutting machine 1 is activated, and the grindstone shaft 2 has a function of transmitting. The rotation is reliably transmitted to the grindstone 10 side. During torque transmission, the pressure contact between the tapered shaft portion 3 of the grindstone shaft 2 and the tapered hole 9 of the main flange 8 and the mounting bolt 18 assist the torque transmission.

 When replacing the old and new grindstones 10 on the grindstone shaft 2 of the grinding and cutting machine 1, first, after the mounting bolts 18 are removed, the clamp arm 20 of the grindstone changing device is used to clamp the main flange 8. Is clamped, and the grindstone holder 7 is removed from the grindstone shaft 2.

 Then, after a new grindstone holder 7 is fitted to the grindstone shaft 2 of the grinding and cutting machine 1 and the clamping by the clamp arm 20 is released, the grindstone holder 7 is attached to the grindstone shaft 2 via the mounting bolts 18. After that, the grinding and cutting machine 1 is started and a predetermined process is performed.

 While the removed grindstone holder 7 is clamped by the clamp arm 20, the fastening bolt 11 is removed, and the sub flange 12 is removed from the main flange 8, so that the grindstone 10 is new. After the replacement, the sub flange 12 is assembled to the main flange 8 with the fastening bolt 11.

 By increasing the number of spline teeth 6 and 22 and chamfering the abutting side end of the spline teeth 6 and 22, it is possible to smoothly engage the spline teeth 6 and 22 with each other. is there.

<Effects of the Invention> That is, according to the present invention, by fitting the taper hole of the grindstone holder to the taper shaft portion of the grindstone shaft, centering is performed and at the same time, the spline teeth mesh with each other. Since the rotation torque of the grindstone shaft is reliably transmitted to the grindstone side, it is possible to reliably transmit the rotation torque of the grindstone shaft and to easily replace the grindstone shaft as compared with the conventional one. effective. This has a particularly beneficial effect as a whetstone holder having a large whetstone.

[Brief description of drawings]

 The drawings show an embodiment of the present invention. Fig. 1 is a partially cutaway plan view of a grindstone holder in which a grindstone holder is attached to a grindstone shaft, and Fig. 2 shows a state in which the holder is removed. FIG. 3 is a front view of the grindstone holder, FIG. 4 is a rear view of the grindstone holder, and FIG. 5 is a front view of the grindstone shaft of the cutting machine. DESCRIPTION OF SYMBOLS 1 ... Grinding cutting machine 2 ... Grinding wheel shaft 3 ... Tapered shaft part 6 ... Spline tooth 7 ... Grinding wheel holder 9 ... Tapered hole 10 ... Grinding wheel 22 ... Spline tooth

Claims (1)

[Claims] 1. A grindstone holder that holds a grindstone and is removably attached to a grindstone shaft of a grinding and cutting machine, wherein the grindstone has a taper hole that can be fitted into a taper taper shaft portion of the grindstone shaft. A grindstone holder having a torque transmitting function, which is provided with spline teeth that can mesh with spline teeth formed on a shaft.