JPH0314281Y2 - - Google Patents

Description

[Detailed description of the invention] A. Industrial application field This invention relates to a device for driving a grinding wheel shaft equipped with a grinding wheel in a grinding machine, and more specifically, it relates to a device that drives a grinding wheel shaft equipped with a grinding wheel in a grinding machine. Regarding a grindstone shaft drive device.

B. Technical background of the invention and its problems Originally, a machine tool such as a surface grinder is equipped with heat sources such as sliding heat or rotational heat generated from each part of the machine, a drive motor, and a hydraulic pressure source.

For this reason, in order to reduce the displacement of various parts of the machine due to temperature rise, methods such as circulating cooling water or partially ventilating the machine have been used.

However, there is no grinding wheel shaft head equipped with the above-mentioned cooling method, and the drive motor for rotating the grinding wheel shaft uses a cooling fan to cool the motor itself.
It is generally installed on the side opposite to the output shaft.

For this reason, hot air tends to fill the column, and a shielding plate blocks the space between the drive motor and the grindstone shaft head to prevent hot air from flowing into the column.

As a result, the rotational heat generated from the rotation support of the grinding wheel shaft and the heat generated by the drive motor are propagated, etc.
Currently, there are problems such as subtle displacement occurring at the point of contact between the grinding wheel surface and the workpiece, making it impossible to improve product accuracy.

C. Purpose of the invention This invention was made in view of the conventional problems mentioned above, and it is possible to effectively cool the drive motor and the bearing part, and to effectively suppress the thermal effects. The purpose of the present invention is to provide a grindstone shaft drive device that can be used.

D Means for solving the problem In order to achieve the above object, this invention includes a grindstone at one end side of a grindstone shaft which is rotatably supported on the grindstone shaft head via a plurality of bearings, In a grinding wheel shaft drive device for a grinding machine in which the output shaft of a drive motor is connected to the other end side, a cover is provided to cover the drive motor, and an inner cylinder is provided to cover the grinding wheel shaft side, and from the inside of the inner cylinder. A cooling fan is provided that sucks air and causes it to pass through the cover to cool the drive motor, and a second cooling fan is provided for cooling air that passes through the outside of the inner cylinder and blows out toward the grinding wheel. It is something.

E. Embodiments of the invention Examples of the invention will be specifically described below with reference to the drawings.

First, the plan view and side view of the surface grinder shown in FIGS. 5 and 6 will be generally described.

A table 3 that performs reciprocating motion using a guide groove provided on the upper surface of the bed 1A extending in the left-right direction in FIG. A column 5 is provided on the upper surface of the bed 1B so as to be movable in left and right directions (FIG. 5).

A grindstone shaft head 7 that is vertically movable is provided on the side wall of the column 5.

A disc-shaped grindstone 11 is attached to the tip of the grindstone shaft 9 rotatably supported by the grindstone shaft head 7, and a drive motor 15 is connected to the rear end of the grindstone shaft 9 via a connecting shaft 13. is provided.

Further, the table 3, column 5, and grindstone shaft head 7 are configured to be driven by an electric motor, a hydraulic cylinder, and the like.

The configuration of this type of surface grinder is common, and detailed general description will be omitted.

1 and 2 show reference examples. In these FIGS. 1 and 2, the guide surface 17 provided on the column 5 is used as a guide, and the sliding surface provided on the left and right ends of the grinding wheel shaft head 7 is used as a guide. The portion 19 makes it slidable up and down.

A grindstone shaft support cylinder 21 is fitted and fixed to the grindstone shaft head 7, and the grindstone shaft 9 is rotatably supported by bearings 23 (e.g., rolling bearings) provided at both internal ends of the grindstone shaft support cylinder 21. has been done.

A disc-shaped grindstone 11 is fixed to the tip of the grindstone shaft 9, and a coupling ring 25 is fitted to the other end of the grindstone shaft 9, and the drive motor 1 is connected to the drive motor 1 through the connection shaft 13.
It is connected to a coupling ring 29 fitted onto the output shaft 27 of No. 5.

Further, the output shaft side flange 31, which is the mounting surface of the drive motor 15, is fastened by a plurality of bolts 37, etc. to the flange 35, which is integrally fixed to one end of the grindstone shaft head 7 by bolts 33, etc., as described above. be.

Note that a cover 39 covering this drive motor 15
is fastened to the flange 35 with a plurality of bolts 41, etc., and the cover 39 serves as a ventilation duct.

A cooling fan 43 is provided on the output shaft side of the drive motor 15 for blowing air from the output shaft side to the side opposite to the output shaft.
is fixed to the output shaft 27.

Note that the drive motor 15 is of a generally known type, and a description of its structure will be omitted.

Furthermore, the above-mentioned grindstone shaft head 7, flange 35,
The cover 39 is provided with an appropriate number of ventilation holes of an appropriate size for ventilation.

With the above configuration, the cooling fan 43 rotates due to the rotation of the drive motor 15, and air is redirected from the output shaft side of the drive motor 15 through the ventilation duct formed by the cover 39 that covers the drive motor 15. Flows to the output shaft side.

Therefore, the air that communicates with the atmosphere inside the column 5 is sucked in through the ventilation holes provided in the grindstone shaft head 7, flange 35, and cover 39 as appropriate, and is discharged to the outside of the machine.

As indicated by the thick arrows in the figure, the flow direction of the air is such that the heat generated from the sliding and rotating parts is discharged to the outside of the machine along the ventilation duct, and at the same time, the drive motor is also cooled.

FIG. 3 and FIG. 4 show an embodiment, and components having the same functions as those in the reference example are given the same reference numerals. In FIGS. 3 and 4, the grindstone shaft support cylinder 21 on which the grindstone shaft head 7 is supported and the inner cylinder 45 that covers the connecting shaft 13 extending from the drive motor 15 that rotates the grindstone shaft 9 are connected to the grindstone shaft head 7. It is integrated inside.

Note that a ventilation duct is provided between the outer surface of the inner cylinder 45 and the inner wall of the grinding wheel shaft head 7, and a ventilation hole having an appropriate size is provided at an appropriate position, and is provided at the lower part of the grinding wheel shaft head 7 on the side opposite to the grinding wheel. It communicates with the cooling fan 47.

With the above configuration, the heat generated by the grinding wheel shaft head is removed by the cooling fan 47 as shown by the thick arrow in the figure, and the air is discharged outside the machine through the ventilation port provided on the grinding wheel side.

Further, by providing a shielding plate 48 shown by a dashed line in FIG. 1, it is possible to suppress the displacement of the column 5 due to the flow of wind flowing into the column 5, and it is also possible to further increase the effect. be.

F. Effects of the Invention As can be understood from the description of the embodiments above, in short, the present invention has a grinding wheel 11 attached to one end side of the grinding wheel shaft 9 rotatably supported by the grinding wheel shaft head 7 via a plurality of bearings 23. A grindstone shaft driving device for a grinding machine is provided with an output shaft 27 of a drive motor 15 connected to the other end side of the grindstone shaft 9, and a cover 39 is provided to cover the drive motor 15.
A cooling fan 43 is provided to cool the drive motor 15 by sucking air from inside the inner cylinder 45 and letting it pass through the cover 39. A second cooling fan 4 for cooling air that is blown out to the grinding wheel 11 side.
7.

As is clear from the above description, in the present invention, a cover 39 that covers the drive motor 15 that drives the grindstone shaft 9 and an inner cylinder 45 that covers the grindstone shaft 9 side are provided, and a cooling fan that cools the drive motor 15 is provided. 4
3 sucks cooling air from the inner cylinder 45 side and causes it to pass through the cover 39. That is, the cooling fan 43 cools the bearing 23 of the grindstone shaft 9 and also cools the drive motor 15.

Furthermore, according to the present invention, the second cooling fan 47
Since the cooling air is sent to the outside of the inner cylinder 45 for cooling, the bearing 23 can be sufficiently cooled, and the heat generated in the bearing 23 can be transmitted to the grindstone shaft head 7. This effectively prevents them from doing so. Furthermore, since the cooling air is blown toward the grinding wheel 11, fine grinding dust generated during the grinding process is transferred to the bearing 2.
This also effectively prevents suction to the third side.

[Brief explanation of drawings]

Fig. 1 is an enlarged plan view showing a reference example of this invention with the main part taken as a cross section, Fig. 2 is an enlarged side view showing the main part of the embodiment shown in Fig. FIG. 4 is an enlarged side view of the embodiment shown in FIG. 3 with a cross section of the main part; FIG. 5 is a front view of the surface grinder; FIG. is a side view of the front grinder. Explanation of symbols representing main parts of the drawing, 5...
Column, 7... Grinding wheel shaft head, 9... Grinding wheel shaft, 11...
...Whetstone, 43...Cooling fan, 47...Cooling fan.

Claims (1)

[Scope of utility model registration request] A grindstone 11 is provided at one end of a grindstone shaft 9 rotatably supported by a grindstone shaft head 7 via a plurality of bearings 23, and an output shaft 27 of a drive motor 15 is connected to the other end of the grindstone shaft 9. This grinding wheel shaft driving device for a grinding machine is provided with a cover 39 that covers the drive motor 15 and an inner cylinder 45 that covers the grinding wheel shaft 9 side, and air is sucked from inside the inner cylinder 45 to drive the inside of the cover 39. A cooling fan 43 is provided for cooling the drive motor 15 by cooling the drive motor 15, and a second cooling fan 47 is provided for cooling air that passes through the outside of the inner cylinder 45 and blows out toward the grinding wheel 11. Grinding wheel shaft drive device for grinding machines.