JPS60245830A - Grease supply bearing - Google Patents

Abstract

PURPOSE:To feed grease continuously while to discharge used grease reliably by fitting a flinger for pressure feeding used grease onto the rotary shaft while providing a grease storage chamber communicating with the grease supply path and the used grease storage chamber while having a float valve in the bearing box. CONSTITUTION:An annular flinger 16 for performing pumping as the shaft rotates is fitted over a rotary shaft 11 while adjoining to the inner ring of bearing 2. A used grease storage chamber 14a is provided radially in same axial direction with the flinger 16 in a bearing housing 14 constructing a bearing box 13. While a lubricant grease supply path 15a reaching from the outercircumference to the endface of bearing 2 and a tubular bottomed grease storage chamber 15b having one end communicating with said supply path 15a and the other end communicating with the used grease storage chamber 14a are provided on the bearing cover 15. A reciprocal float valve 18 is provided in said chamber 15b to prevent over packing of grease.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field to which the Invention Pertains] The present invention relates to a grease replenishment type bearing device that is capable of continuously replenishing a bearing with an appropriate amount of grease.

[Prior art and its problems]

A conventional example of a grease-replenishable bearing device will be explained based on FIG. 6. In this figure, a rotating shaft 1 is supported by a cylindrical bearing housing 8 via a bearing 2, and bearing covers 4 and 5 surrounding the end surfaces of the bearing 2 are attached to both end surfaces of the bearing housing 3. The bearing housing 8 is provided with a replenishment port 8a for lubricating the bearing 2, and the outer peripheral portion of the bearing cover 5 is provided with a discharge port 5a for waste grease that has lubricated the bearing 2. The lubricating grease is supplied by being pushed through the supply port 8a by an injection pump or the like.

If the bearing 2 is filled with too much grease, the temperature will rise due to the heat of agitation of the grease generated as the bearing 2 rotates, and especially high-speed rotating bearings may overheat and burn out. With the above structure, too much grease may be packed during replenishment, and since the replenishment is intermittent, it is not possible to continuously replenish the bearing 2 with an appropriate amount of grease during rotation, resulting in a decrease in lubrication performance and a high temperature of the bearing 2. It may happen. Also, waste grease is removed from bearing 2.
After being blown away by the action of the rotating part, it is discharged by its own weight, which has the disadvantage that it accumulates in the discharge port 5a and cannot be discharged reliably.

[Purpose of the invention]

SUMMARY OF THE INVENTION In order to eliminate the above-mentioned drawbacks, the present invention aims to provide a grease replenishment type bearing device that is capable of continuously replenishing a bearing with an appropriate amount of grease and reliably discharging waste grease. .

[Key points of the invention]

In order to achieve the above-mentioned object, this invention has a rotating shaft fitted with a flinger for pumping waste grease to a waste grease storage chamber, and a bottomed cylindrical replenishment grease storage chamber in a bearing box at both ends thereof. A part is provided in communication with the grease replenishment path and the waste grease storage chamber, and a float valve that is reciprocated by the grease pressure or the pumping action of the flinger is provided in the replenishment grease storage chamber to prevent overfilling with grease during replenishment; The bearing is designed to continuously supply an appropriate amount of grease to the bearing during rotation, and to ensure that waste grease is discharged.

[Embodiments of the invention]

FIG. 1 shows an embodiment of the present invention, and parts indicated by the same reference numerals as in FIG. 6 are the same parts. In this figure, a rotating shaft 11 is supported by a bearing box 13 via a bearing 2, and an annular flinger 16 that performs a pumping action as it rotates is fitted onto the rotating shaft 11 adjacent to the inner ring of the bearing 2. There is. The bearing box 18 consists of a bearing housing 14 into which the bearing 2 is fitted and which surrounds the flinger 16, and a bearing cover 15 which is attached to the bearing housing 14 and which surrounds the end face of the bearing 2 opposite to the flinger 16. . A waste grease storage chamber 14a is radially provided in the bearing housing 14 at the same axial position as the flinger 16, and the waste grease accumulated in this waste grease storage chamber i4a can be scraped out from the outside by removing the screw plug 17. It can be scraped out and discharged. The bearing cover 15 is covered with a bearing 2 from the outer periphery.
A replenishment grease storage chamber 1 having a bottomed cylindrical shape and having one end communicating with the replenishment path i5a and the other end communicating with the waste grease storage chamber 11.
5b is provided. This supply grease storage chamber 15
Inside b is a float valve 1 that can reciprocate inside.
8 is provided with an MI gap between it and the peripheral wall of the replenishment grease storage chamber 15b. This float valve 18 can also be implemented as a plate-shaped one. The replenishment grease storage chamber 15b is provided with a bottomed cylindrical hole from the outer periphery of the bearing cover 15, a communication hole 15C communicating with the replenishment path 15a is formed at the bottom of the hole, and a projection of an appropriate height is formed at the center of the inside. It is formed by closing the inlet with a stopper 19 having a diameter 19a. A communication passage 20 communicating the other end of the supply grease storage chamber 15b with the waste grease storage chamber 14& is provided in the axial direction through the bearing cover 15 and the bearing housing 14 on the side of the protrusion 19& of the plug 19.

The outer periphery of the flinger 16 is eccentrically formed as shown in FIG. 2, and the pumping action is performed by the air pressure in the radial direction generated as the finger rotates. The allinger 16 may have a cross-sectional shape as shown in FIGS. 8 to 5, or may have a disc shape with a part of the outer periphery. When lubricating grease is pushed through the supply channel 15 & with an injection pump etc., some of the grease flows into the float valve 1.
8 and replenish grease storage chamber 1 from communication hole 150.
5b, it is possible to replenish the bearing 2 part with new grease without filling it too much. The waste grease that has lubricated the bearing 2 is pumped into the waste grease storage chamber 14a by the pump action of the flinger 16, and at the same time, the float valve 18 is pushed down little by little by the grease pressure or air pressure.

This float valve 18 is lowered not only by the pressure of the waste grease and the air pressure but also by its own weight, and thereby the replenishment grease storage chamber 15b
New grease accumulated inside is pushed out and continuously replenished to the two parts of the bearing in appropriate amounts during rotation.

[Effects of the Invention] According to the present invention, in the grease replenishment type bearing device, a flinger for pumping waste grease to the waste grease storage chamber is fitted on the rotating shaft, and a bottomed cylindrical replenishment grease is fitted in the bearing box. A storage chamber is provided with both ends communicating with the grease replenishment path and the waste grease storage chamber, and a float valve is provided in the replenishment grease storage chamber to be moved back and forth by the grease pressure or the pumping action of the flinger, so that when replenishing Excess grease is stored in the replenishment grease storage chamber to prevent the bearing from being overfilled with grease, and during rotation, new grease that has accumulated in the replenishment grease storage chamber is pushed out little by little with a float valve to continuously supply the appropriate amount to the bearing. The advantage is that the waste grease can be replenished and the waste grease can be reliably discharged by the pumping action of the flinger.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view of an embodiment of the present invention, FIG. 2 is a longitudinal sectional view taken along line I-1 in FIG. 1, and FIGS. 8 to 5 are longitudinal sectional views of other embodiments of the invention. 6 are vertical sectional views of the conventional example. 2... Bearing, 11... Rotating shaft, 18... Bearing box,
14a...waste grease storage room, 15a...supply route,
15b... Replenishment grease storage chamber, 16... Flinger, 18 Fig. 1 3 Fig. 2 Fig. 3 Fig. 4 Fig. 5 Fig. 6

Claims (1)

[Claims] 1) A bearing box is provided with a grease replenishment path for bearing lubrication, a waste grease storage chamber that can be scraped out from the outside, and a bottomed cylindrical replenishment grease storage chamber that communicates with the replenishment path and the waste grease storage chamber at both ends. At the same time, a flinger is fitted on the rotating shaft to forcefully feed waste grease to the waste grease storage chamber by the pumping action of the rotating part, and a float valve is provided in the replenishment grease storage chamber to be reciprocated by the grease pressure or the pumping action of the flinger. Grease replenishment type bearing device.