JPS5821328Y2 - Grease discharge device for rotating electrical machines - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a grease discharging device for a rotating electrical machine for taking out old bearing lubricating grease to the side of a bearing box.

Conventionally, in general rotating electric machines, an oil drain port was provided at the bottom of the bearing box, and used grease was removed from the oil drain port, but depending on the connection state with the load, oil draining work may be necessary. There were times when it was difficult.

FIGS. 1 and 2 show a conventional example in which the drained oil is taken out to the side of the bearing box in order to facilitate the oil draining work in such a case.

In the figure, 1 is an electric motor, 2 is a rotating shaft, 3 is a bearing that supports the rotating shaft 2, 4 is a bearing box that accommodates the bearing 3, 5 is a through hole that passes horizontally through the lower part of the bearing box 4, and 6 is a through hole that passes through the bottom of the bearing box 4. This is a drain oil reservoir that can be slid horizontally within the hole 5.

By the way, in the conventional device configured as described above, in order to take out the drain oil receiver 6 on the side as shown by the chain line in FIG. There was a drawback that the area increased.

This invention aims to improve the above-mentioned drawbacks.

An embodiment of this invention will be described below with reference to FIGS. 3 to T.

In the figure, the same reference numerals as in FIGS. 1 and 2 indicate the same or corresponding parts, 7 is an oil drain receiver that can be slid horizontally in the through hole 5, and 7a to 7c are oil drain receivers 1. 7a is a circular side plate, 1b is a screw hole whose center is at a predetermined distance S from the center P of the side plate 7a, and 7c is a guide with a width W that extends from the screw hole 7b through the center P and reaches the outer periphery of the side plate 7a. Groove, 8 is side plate 7
The guide rod 8a is screwed into the screw hole 7b of a, the guide rod 8
8b is a small diameter part with an outer diameter d that supports the threaded part 8a on an extension of the threaded part 8a, and 8c is a guide rod provided at the end of the small diameter part 8b. Reference numeral 8 is an operating handle for rotating the guide rod 8, and reference numeral 9.10 is a support fitting for the guide rod 8.

The length t□ of the small diameter w8b of the guide rod 8 is longer than the axial length t2 of the drain oil receiver 7, and the outer diameter d1 of the small diameter portion 8b is longer than the axial length t2 of the drain oil receiver 7.
Outer diameter of threaded portion 8a and guide groove 7 of drain oil receiving side plate γa
The dimensions between the groove widths W of c are set so that the relationship d<W<D holds.

As shown in FIG. 6, the drain oil receiver 7 configured as described above is supported by a guide rod 8 within the through hole 5,
The old grease in the bearing 3 is discharged into the drain oil receiver γ by pushing new grease into the oil supply port 11 at the upper part of the bearing box 4 shown in FIG. 5 with a grease gun (not shown).

Next, by rotating the operating handle 8c in a predetermined direction, the drain oil receiver 7 can be moved in the axial direction of the through hole 5.

Note that since the rotation center of the drain oil receiver 70 is eccentric with respect to the rotation center of the guide groove 80, the rotation of the drain oil receiver 70 is prevented by the through hole 5 with respect to the rotation of the guide shaft 8.

Also, by rotating the operating handle 8c while preventing the rotation of the oil drain 7 that has moved to the side of the through hole 5 by an external force, the oil drain receiver 7 is separated from the threaded portion 8a and moved to the small diameter portion 8b. can be done.

Since the outer diameter d of the small diameter portion 8b is smaller than the groove width W of the guide rod 7c provided on the side plate 7a of the oil drain receiver 7, the oil drain receiver 7 can be removed from the guide rod 8, and the old grease can be removed. taken outside.

As described above, with this invention, the drain oil receiver can be moved to the side by rotating the guide rod and used grease can be taken out, so there is no need for extra space to take out the drain oil. Therefore, the installation area of the rotating electric machine does not increase.

[Brief explanation of the drawing]

Figures 1 and 2 show conventional examples, with Figure 1 being a front view and Figure 2 being a front view.
The figure is an enlarged sectional view of the main part, Figures 3 to 1 show an embodiment of this invention, Figure 3 is a front view of the drain oil receiver partially shown in cross section, and Figure 4 is the figure 3. FIG. 5 is a longitudinal sectional view of the bearing box, FIG. 6 is a sectional view taken along VI-VI in FIG. In the figures, the same reference numerals indicate the same or corresponding parts, 4
is a bearing box, 5 is a through hole, 7 is a drain oil receiver, 7a is a side plate, 1
b is a screw hole, 7c is a guide groove, 8 is a guide rod, 8a is a threaded portion, and 8b is a small diameter portion.

Claims (1)

[Scope of utility model registration request] A bearing box that accommodates a bearing that supports a rotating shaft of a rotating electrical machine and is provided with a through hole passing through the lower part horizontally, a screw hole having a similar shape to the cross section of the through hole and spaced a predetermined distance from the center, and has side plates at both ends that are provided with guide grooves that reach the screw hole from the outer periphery and have a width smaller than the screw hole, and a drain oil receiver that is slidably arranged in the through hole; A guide rod is provided, with a portion located at the hole being a threaded portion to be screwed into the screw hole, and a portion protruding from the through hole being a small diameter portion smaller than the guide groove. A grease discharge device for a rotating electric machine in which an oil receiver is moved to the outside of the through hole.