JPS5829355Y2 - Automatic grease replenishment device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for automatically and continuously replenishing bearings with grease.

Grease has conventionally been supplied to bearings provided on rotating shafts for lubrication, and replenishment of grease is generally carried out periodically using a grease gun.

However, the amount of grease depletion varies depending on the operating conditions of the rotating electrical machine. If the grease is insufficient before regular replenishment, the bearings will burn out during continuous operation, while regular replenishment may be carried out in large amounts even though the grease depletion is small. This not only wastes grease, but also raises the temperature of the bearing, shortening its life, and causes various problems such as grease leakage, which contaminates the insulators and lowers the insulation resistance.

In view of the above-mentioned drawbacks, the present invention was devised based on a novel idea with the object of providing an automatic grease replenishing device that automatically replenishes grease without causing insufficient or excessive grease.

In order to achieve this purpose, the present invention supports a rotary shaft rotatably, has a small outer cover and a small inner cover on both sides, and presses a button on a device that supplies grease to the covered bearing, and both ends are sealed and grease is supplied to one end. The coupling part of the cylindrical grease case is formed with a coupling part having an opening and a through hole, and the hole communicating with the bearing 1 of the outer small lid is aligned with the supply port of the coupling part. The extruded body with the abrasive body fixed in the grease case is arranged to be connected to the outer small lid via a spring.The abrasive body is passed through the through hole of the coupling part and attached to the rotating shaft by the spring. It is characterized by pressure contact, so the abrasive body wears out according to the rotation speed of the rotating shaft, and an appropriate amount of grease is always replenished, and the grease is not reinforced during stoppage, so there is no waste.

Here, an embodiment of the present invention will be described with reference to the drawings.

The rotating shaft 1 is equipped with a bearing 2, and the rotating shaft 1 is equipped with a bearing 2.
A nut 3 is screwed into the rotating shaft 1 to fix the inner ring 2a of the rotary shaft 1.

4 indicates a washer to prevent the nut 3 from loosening.

A bearing frame 5 is fixed to the outer periphery of the outer ring 2b of the bearing 2, and a hole 5a, which will be a part of a grease passage in the bearing 2 housing, is passed through the bearing frame 5 from a replenishment port, which will be described later.

An inner small cover 6 and an outer small cover 7 are provided on both sides of the bearing 2 and the bearing frame 5.

A U-shaped hole 6a through which grease passes is provided in the inner small lid 6, and communicates between the hole 5a of the bearing frame 5 and the bearing 2.

The outer small lid 7 has a cavity 7 through which grease from the bearing 2 is discharged.
A is provided at the bottom of the outer small lid 7, and a reservoir 8 for collecting waste grease is attached to the lower part of the outer small lid 7 and communicating with the cavity 7a.

The outer small lid 7 is provided with a recess, and the replenishment port 9a side of the grease case 9 is screwed into the recess. It has reached this point.

Further, a hole 7c is provided in the outer small lid 7 so as to pass through an abrasion body 10 protruding from the grease case 9.

The coupling part 9b of the grease case 9 is screwed into the recess of the outer small lid 7, and the inside of the grease case 9 is filled with grease 11.
It is covered with an extrusion body 12 for extruding.

A spring 13 is interposed between the extrusion body 12 and the grease case 9, and a force is applied to push the extrusion body 12 downward, or in other words, to push out the grease 11 from the supply port 9a.

An abrasive body 10 is disposed through the grease case 9 so as to support the extruded body 12, and this abrasive body 10 is further connected to the outer small lid 7.
It penetrates through the hole 7c and its end is in contact with the rotating shaft 1.

The pressure exerted by the spring 13 is therefore supported by the ends of the wearable body 10.

The material of the abrasive body 10 is made of a substance that is abraded by sliding, such as carbon such as pencil lead, talc, or lead, and its abrasion resistance is adapted to the lifespan of the grease 11.

That is, the abrasive body 10 does not wear out too quickly, nor does it wear out easily, and the degree of wear is determined in consideration of the life of the grease 11 and the rotational speed of the rotating shaft 1.

The degree of this wear is determined by the material.

When the rotary shaft 1 rotates, the abrasive body 10 pressed against the rotary shaft 1 by the spring 13 wears out little by little, the extrusion body 12 descends, and the grease 11 is extruded from the supply port 9a.

Therefore, as long as the rotating shaft 1 is rotating, the bearing 2 is automatically replenished with the grease 11 little by little.

In this embodiment, the grease case 9 is provided on the outer small lid, but it may be provided on the inner small lid 6.

As embodied in the above embodiments, according to the present invention, by replenishing grease to the bearing according to the degree of wear of the wear body, there is no problem of extreme grease shortage or excess as in the conventional case, and the rotation speed is reduced. An appropriate amount of grease can be replenished to the bearing according to the situation, and grease is not replenished while the rotating electrical machine is stopped, eliminating waste.

In this way, it was possible to replenish grease stably over a long period of time without waste.

[Brief explanation of drawings]

The figure is a sectional view showing an embodiment of an automatic grease replenishing device according to the present invention. In the drawings, 1 is a rotating shaft, 2 is a bearing, 7b is a hole, 9 is a grease case, 9a is a supply port, 9b is a joint, 10 is an abrasive body, 11 is grease, and 12 is an extruded body.

Claims (1)

[Scope of utility model registration request] In a device for supplying grease to a bearing that rotatably supports a rotating shaft and covers both sides with a small outer cover and a small inner cover, a joint part is formed that is sealed at both ends and has a supply port and a through hole at one end. The connecting portion of the cylindrical grease case is connected to the outer small lid so that the hole communicating with the bearing housing of the outer small lid matches the supply port of the connecting portion, and the grease case An extruded body having an abrasive body fixed therein is disposed via a spring, and the abrasive body passes through a through hole of the coupling part and is pressed against the rotating shaft by the spring. Supply equipment.