JPH0686885B2 - Bearing lubrication device - Google Patents

Description

The present invention relates to a bearing oiling device.

[Background of the Invention]

A conventional bearing oiling device is, as disclosed in Japanese Patent Laid-Open No. 52-19111, a felt or cotton cloth oiling pad, which is pressed and closely attached to the axle, and the other is immersed in lubricating oil to cause capillary action in the pad. I used to refuel.
This oil supply device has no moving parts and can supply oil reliably, but has a drawback that the lubrication function of the bearing part is impaired because the oil supply amount is small because it utilizes the capillary action.

Further, as this type of bearing oil supply device, there is one that is configured by a gear pump in which rotational power is transmitted by a drive gear and a driven gear fitted to an axle, and the supply lubricating oil is made to directly flow into the bearing portion.

5 to 7 show a conventional example of this type of bearing oil supply device. As shown in the figure, each of the bearings 1 and 2 has a two-divided structure, and is entwined with a bearing box 3 and a main motor frame 4 and supported by an axle 5. The bearing box 3 has an oil tank 3a at the center, oil tanks 3b on both sides, and an oil reservoir 3c at the upper center. The gear pump 6 is mounted in the central oil tank 3a, and the rotational force is transmitted by the drive gear 7 and the driven gear 8 fitted to the axle 5. The lubricating oil discharged from the gear pump 6 is press-fitted into the oil reservoir 3c in the upper center part through the discharge pipe 3d in the bearing box 3 and flows into the oil tanks 3b on both sides. And the oil sump in the upper center
When the oil level of 3c exceeds the position a, the lubricating oil flows into the gap between the bearing inner diameter surface and the axle journal and is supplied to the shaft sliding portion. After this, the lubricating oil returns to the central oil tank 3a and circulates via two paths 3e (only one is shown). A refueling device (refueling pad) 9 formed of felt using capillary action, which is arranged in the oil tanks 3b on both sides, serves as a supplementary lubrication function, and the gear pump 6 which is the refueling pump or when the electric vehicle is started fails. Help refuel when you do.

By the way, the bearing lubrication device thus constructed has a drawback that the structure is complicated. That is, it has been experimentally confirmed that the optimum amount of lubricating oil supplied without impairing the lubricating function of the bearings 1 and 2 is 100 cc / h. However, the supply capacity of the gear pump 6, especially when the train speed becomes high and the axle 5 rotates at high speed, the oil supply capacity of the gear pump 6 is improved, and more lubricating oil than necessary is forcibly supplied to the bearings 1 and 2. Because it is done
The lubricating oil forcibly supplied to the bearings 1 and 2 leaks out from the flange portions 1b and 2b. Since the oil collecting mechanisms 1a and 2a are provided on the flange portions 1b and 2b in order to prevent the leakage of the lubricating oil, the structure of the bearing oil supply device becomes complicated.

FIG. 8 shows another conventional example of the bearing oil supply device.
As shown in the figure, the bearing lubrication device is driven by an eccentric ring (annular ring) 10 provided on the axle 5, and the lubricating oil 3a
The oil supply pump 11 has a suction port 11a and a discharge port 11b that are open in the interior, and a discharge pipe 3d that connects between the discharge port 11b of the oil supply pump 11 and the bearing 1. The refueling pump 11 is reciprocatingly powered by the reciprocating piston 12 of the refueling pump 11 by the cam mechanism of the eccentric ring 10 fitted to the axle 5, so that the lubricating oil 3ao is discharged from the suction port 11a to the discharge port 11a of the refueling pump 11.
Flow to b. The lubricating oil 3ao is supplied from the outlet 13 of the discharge pipe 3d through the discharge pipe 3d between the inner diameter surface of the bearing 1 and the axle journal surface to perform bearing lubrication. In this bearing oil supply device as well, since the lubricating oil 3ao is forcibly supplied to the bearing 1 as described above, the lubricating oil 3ao supplied to the bearing 1 leaks from the flange portion 1b of the bearing 1 to the outside. Therefore, there was a problem that the consumption of lubricating oil 3ao was large.

[Object of the Invention] The present invention has been made in view of the above points, and enables the amount of lubricating oil supplied to the bearing to be always the optimum amount even when the supply capacity of the oil supply pump is excessive. An object of the present invention is to provide a bearing oil supply device.

[Outline of Invention]

That is, the present invention relates to a bearing installed on an axle for driving a wheel, a bearing box provided under the bearing for storing lubricating oil, and driven by an annular ring provided on the axle, and An oil supply pump having a suction port and a discharge pipe opened in the oil, and one end pressed against the axle through an opening hole provided in the bearing, and the other end immersed in the lubricating oil. In a bearing oiling device having a pad, the oiling pad is slidably fixed to a support body fixed to an opening in the upper portion of the bearing box, and one end of the oiling pad is pressed to an axle of the oiling pad. An open oil supply pad discharge pipe is provided, and the other end of the oil supply pad discharge pipe and the outlet of the discharge pipe of the oil supply pump are connected, whereby the amount of lubricating oil to the bearing is Constrained to a constant So as to.

Example of Invention

Hereinafter, the present invention will be described based on the illustrated embodiments. 1 to 4 show an embodiment of the present invention.
Since the same parts as those of the prior art are designated by the same reference numerals, the description thereof will be omitted. In this embodiment, the refueling pad 9 is slidably fixed to a support 9a fixed to the opening 3f in the upper part of the bearing box 3, and one end of the refueling pad 9 is opened at a pressing contact portion 9b with the axle 5. The oil supply pad discharge pipe 9c is provided, and the other end of the oil supply pad discharge pipe 9c is connected to the outlet of the discharge pipe 3d of the oil supply pump 11. By doing so, the refueling pad 9 is slidably fixed to the support body 9a fixed to the opening 3f in the upper part of the bearing box 3, and at the same time, the refueling pad 9 has a pressing contact portion 9b with the axle 5 on one side. An oil supply pad discharge pipe 9c having an open end is provided, and the other end of the oil supply pad discharge pipe 9c and the oil supply pump
The outlet of the discharge pipe 3d of 11 is connected to the bearing
The amount of lubricating oil supplied to 1, 2 will be suppressed to a constant level, and the amount of lubricating oil 3ao supplied to bearings 1, 2 will always be the optimum amount even if the supply capacity of the oil supply pump 11 is excessive. It is possible to obtain a bearing oiling device capable of.

That is, through the discharge pipe 3d drawn out from the oil supply pump 11 and the opening holes 1c provided in the bearings 1 and 2, the oil supply pad 9 is opened with the outlet portion 9d in the vicinity of the surface in pressure contact with the axle 5. The support pad 9a of the oil supply pad 9 and the oil supply pad discharge pipe 9c, which extends to the outside, are connected by a connection joint 9e. By doing so, the lubricating oil 3ao supplied from the oil supply pump 11 is connected to the discharge pipe 3d drawn from the oil supply pump 11 and the connecting joint 9e through the connection pipe 9e as shown by the arrow in the figure, and the oil supply pad After passing through the oil supply pad discharge pipe 9c attached to the support body 9a, the outlet 9d of the oil supply pad discharge pipe 9c is discharged to the pressing contact portion 9b of the oil supply pad 9 with the axle 5. That is, the lubricating oil 3ao supplied by the oil supply pump 11 is not forcedly forced into the gap between the bearings 1 and 2 and the journal surface of the axle 5, but is injected into the axle 5 of the oil supply pad 9. It is supplied to the bearing portion through the pressing contact portion 9b. Therefore, no matter how large the lubricating oil supply capacity of the oil supply pump 11 is, the surplus lubricating oil will be returned to the bearing housing 3 provided below the bearings 1 and 2. Then, the amount of oil flowing into the bearing portion is suppressed. Even if the train speed becomes high and the refueling capacity of the refueling pump 11 becomes unnecessarily high as the rotation speed of the axle 5 increases, the amount of lubricating oil to the bearing portion is suppressed to a constant value. It is possible to reduce leakage of lubricating oil from the second flange portions 1b, 2b and the like. The refueling pad 9 is slidable toward the axle 5 with the support 9a,
Since it is pressed by the spring, the oil supply pad 9 is always in close contact with the axle 5 at a predetermined pressure, and the lower part of the oil supply pad 9 is immersed in the lubricating oil 3ao of the bearing housing 3. Therefore, when the oil supply pump 11 has a malfunction due to a failure or when the lubricating oil supply capacity of the oil supply pump 11 is reduced such as when the train starts to start, it plays an auxiliary role.
Further, the oil supply pad discharge pipe 9c is attached and fixed to the support body 9a of the oil supply pad 9, and is connected to the discharge pipe 3d of the oil supply pump 11 via the connection joint 9e outside the support body 9a. When the oil is worn, the refueling pad 9 can be taken out by removing the connection joint 9e, the refueling pad 9 can be easily replaced, and the maintainability can be improved.

In this embodiment, the number of the oil supply pump 11 is one for the bearings 1 and 2 provided on both the left and right sides, and the discharge pipe 3d is branched to both of them, but the husband and oil supply pumps 11 are arranged on the bearings 1 and 2. You may do it.

In addition, although the oil supply pump 11 is driven by the eccentric ring 10 (annular ring) provided on the axle 5 in the present embodiment, the invention is not limited to this, and may be driven by a gear.

〔The invention's effect〕

As described above, according to the present invention, even if the supply capacity of the oil supply pump is excessively large, the amount of lubricating oil supplied to the bearing can be always set to the optimum oil amount, and the supply capacity of the oil supply pump is excessively large. Even so, it is possible to obtain a bearing oil supply device that enables the amount of lubricating oil supplied to the bearing to always be the optimum amount.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of an embodiment of a bearing oiling device of the present invention,
FIG. 2 is a sectional view around the oil supply pad of the embodiment, FIG. 3 is a sectional view around the oil supply pump of the embodiment, and FIG. 4 is a perspective view showing a supporting state of the oil supply pad of the embodiment. FIG. 5 is a vertical cross-sectional side view of a conventional bearing lubrication device, FIG. 6 is a sectional view of the same conventional lubrication pad, FIG. 7 is a sectional view of a conventional lubrication pump, and FIG. 8 is a conventional bearing lubrication device. It is a vertical side view of another example of an apparatus. 1 ... Bearing, 1c ... Opening hole provided in the bearing, 2 ... Bearing,
3 …… Bearing box, 3ao …… Lubricant, 3d …… Discharge pipe, 3f ……
Aperture in the upper part of the bearing box, 5 ... axle, 9 ... lubrication pad (lubrication device), 9a ... support, 9b ... press contact with the axle, 9c ... lubrication pad discharge pipe, 9d ... lubrication Pad discharge pipe outlet, 9e ...... connection joint, 10 ... eccentric ring (ring), 11 ... oil pump, 11a ... suction port, 12 ... reciprocating piston.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Masaaki Nakano, 502 Jinritsucho, Tsuchiura-shi, Ibaraki Prefecture, Institute of Mechanical Research, Hiritsu Seisakusho Co., Ltd. Hitachi Works Hitachi Factory

Claims (3)

[Claims] 1. A bearing mounted on an axle for driving a wheel,
A bearing box provided under the bearing and storing lubricating oil; an oil pump driven by an annular ring provided on the axle and having a suction port and a discharge pipe opened to the lubricating oil; A bearing oiling device having one end pressed against the axle through an opening provided in a bearing and the other end having an oiling pad immersed in the lubricating oil. Is slidably fixed to a support body fixed to the opening of the oil supply pad, and an oil supply pad discharge pipe having one end opened is provided at a pressing contact portion of the oil supply pad with the axle, and the other end of the oil supply pad discharge pipe is provided. A bearing oil supply device, characterized in that the outlet of the discharge pipe of the oil supply pump is connected. 2. The bearing oil supply device according to claim 1, wherein the oil supply pad is made of felt. 3. The bearing oil supply device according to claim 1, wherein the oil supply pad discharge pipe of the oil supply pad is fixed to the support body.