JPH0336886Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a bearing lubrication and oiling device, particularly to a bearing lubrication and oiling device for a marine gyro.

[Conventional technology]

As shown in FIG. 3, a conventional lubricating oil supply device of this type has one end immersed in lubricating oil 32 in an oil storage tank 31 provided outside a gyro case 30, and the other end of an oil wick 33 made of felt, for example. is directly wound around the outer end of the rotating shaft 35 of the gyro rotor supported by the bearing 34 in the gyro case 30,
The lubricating oil adhering to the rotating shaft 35 from the oil core 33 is scattered as the rotating shaft 35 rotates, and a portion of the scattered oil is supplied to the bearing 34 of the rotating shaft 35. on the other hand,
Lubricating oil 32 passing through the bearing 34 and entering inside it
is configured such that one end opens below the inside of the bearing 34 inside the gyro case 30, and the other end returns into the oil storage tank 31 through an oil drain pipe 36 communicating with the oil storage tank 31 provided outside the gyro case 30. be.

In addition, other lubricating oil supply devices are as shown in Fig. 4.
A felt 41 provided below inside the gyro case 40 is impregnated with lubricating oil.
The other end of the oil core 42, one end of which is in contact with the oil wick 42, is brought into contact with the rotating part 46 of the bearing 45 of the rotating shaft 44 of the gyro rotor 43 to supply oil to the bearing 45, and the lubricating oil that has passed through the bearing 45 is It is configured to protrude from the through hole 48 of the housing 47 of the rotor 43 and return to the felt 41 below.

[Problem that the invention attempts to solve]

However, in the conventional device shown in Figure 3, only a portion of the splashed oil is used for lubrication, which may result in incomplete lubrication, and since an oil storage tank is used, the lubrication oil There is an unbalance of the mass due to the movement of the compass, which causes a large error in the compass. Furthermore, in the device shown in Fig. 4, the lubricating oil is supplied from the felt below the bearing via the oil wick by directly connecting the oil wick to the rotating part of the bearing. The problem was that the relationship between the amount and the friction torque during rotation of the gyro was difficult, and assembly and adjustment required skill.

[Means for Solving the Problems] The present invention includes a refueling fitting attached to the end of the rotating shaft of a marine gyro, which has a conical shape that expands from the outside of the ball bearing toward the inner ring thereof;
a felt impregnated with lubricating oil that partially contacts the small diameter portion of the metal fitting; a bush that is disposed on the outer ring of the ball bearing and has grooves and holes at the bottom for the outflow of lubricating oil; A bearing lubricating oil supply device for a marine gyro is constructed from a tapered conical sealing fitting attached to the inner side of the ball bearing of the rotating shaft.

[Effect]

In this invention, felt is used as a part to store lubricating oil, and this felt is impregnated with lubricating oil to prevent weight imbalance due to oil movement, and to lubricate the bearing of the rotating shaft of the gyro. The oil is supplied by bringing a felt containing lubricating oil into contact with a conical lubricating fitting with a large diameter on the bearing, which has the function of fixing and lubricating the bearing, and using centrifugal force, the lubricating oil is used for this lubricating purpose. It rises along the conical surface of the metal fitting and is supplied to the bearing. This ensures complete lubrication.

〔Example〕

An example of the present invention will be described below with reference to FIGS. 1 and 2. In this example, the rotor 1
A rotor 2 is provided inside the rotor 2, and for this rotor 2,
The stator 3 is arranged to form a motor section. A rotating shaft 4 is fixed to the center of the gyro 1. Gyro cases 5 and 6 are arranged on the left and right sides of the outer circumference of the gyro 1, and two ball bearings 7 and 8 on the left and right sides are housed in the gyro cases 5 and 6, respectively, in order to support the rotating shaft 4 of the gyro 1. Covers 9 and 10 with seals for positioning the rotation shaft 4 of the gyro 1 in the axial direction are fixed to both sides of the gyro cases 5 and 6, respectively. The outer periphery of each of the ball bearings 7 and 8 in the gyro cases 5 and 6 is cylindrical and has a cutout groove on the lower side for inserting a felt, grooves 11B and 12B for oil to flow out, and holes 11A and 12A. The provided bushes 11 and 12 are respectively disposed. Ball bearings 7 and 8 are installed at corresponding positions inside the ball bearings 7 and 8 on both sides of the rotating shaft 4 of the gyro 1.
A conical sealing fitting 13, 1 that becomes larger in diameter toward the
4 will be provided. On the other hand, ball bearings 7 and 8 serve both to fix the inner rings of ball bearings 7 and 8 and to supply oil.
A conical oil supply fitting 15 that becomes larger in diameter toward
16 are attached to both ends of the rotating shaft 4 of the gyro 1 outside the ball bearings 7 and 8, respectively. The outer ring of one ball bearing 7 is held down by a ring-shaped fixing fitting 17, and the outer ring of the other ball bearing 8 is supported via a holding fitting 18 and a preload spring 19.

Ball bearing 7 of gyro case 5, 6,
As shown in FIG. 2, which is an enlarged view of the peripheral area of one of the ball bearings 7, oil wicks or felts 20, 22, 21, 23 impregnated with lubricating oil are provided around the ball bearing 8 to function as a lubricating oil supply and a tank. Place them respectively. In this case, a portion of the felt 22 contacts the conical recess or small diameter portion of the oil supply fitting 15, and a portion of the felt 20 contacts the oil drain hole 11 of the bush 11.
Block A. The other felts 23 and 21 are also arranged in substantially the same manner.

In this example, when the gyro 1 in the gyro cases 5 and 6 rotates, the rotor 2, the rotating shaft 4, the seal fittings 13 and 14, the inner rings of the ball bearings 7 and 8, and the oil supply fittings 15 and 16 are integrated. and rotate. Therefore, when the gyro 1 rotates, the lubrication fittings 15 and 16 also rotate together with the gyro 1 as described above, but at that time, the lubrication fittings 15 and 1
The lubricating oil is scraped out from the felts 22 and 23 that are in contact with the ball bearings 15 and 16, and the scraped lubricating oil spreads toward the inner rings of the ball bearings 7 and 8 due to the action of centrifugal force. It flows out as if spreading along the inner rings of the ball bearings 7 and 8, and flows out onto the transfer surfaces of the ball bearings 7 and 8, thereby fulfilling the lubricating function of the ball bearings 7 and 8. While the gyro 1 is rotating, lubricating oil is continuously supplied to the transfer surfaces of the ball bearings 7 and 8 from the felts 22 and 23 and the oil supply fittings 15 and 16, so that it overflows from the transfer surfaces of the ball bearings 7 and 8. The released lubricating oil flows out to the seal fittings 13 and 14, respectively. The seal fittings 13 and 14 are the oil supply fittings 1
Since the conical shape is inversely tapered compared to the conical shape of the bushes 11 and 16, excess lubricating oil does not flow through the rotating shaft 4 and flows into the lubricating oil draining groove at the bottom of the bushes 11 and 12. 11B, 12B and hole 1
1A and 12A, and is returned to the felts 20 and 21 inserted into the notch grooves at the bottom of the bushes 11 and 12. In this case, since the felts 20 and 22 and the felts 21 and 23 are each integrally formed, the lubricating oil circulates between the felts.

In addition, the lid 9 attached to the gyroscope cases 5 and 6,
10 are each equipped with a seal to prevent lubricating oil from leaking to the outside.

As mentioned above, the bearing lubrication and oil supply device according to the present invention is a self-lubricating system that supplies lubricating oil to the bearing as the gyro rotates, which prevents the lubricating oil from leaking into the gyro and prevents long-term operation of the gyro. can withstand.

[Effect of idea]

According to the present invention described above, there are the following effects. That is, since the structure is simple, the number of parts is small and it can be manufactured at low cost. Since it is a circulating oil supply system within a small volume, there is little mass imbalance, which is advantageous in terms of the performance of the gyro.

Since an inverted conical sealing fitting is used for the ball bearing, it is possible to prevent lubricating oil from leaking to the gyro.

Lubricant the ball bearing transfer surface (high temperature)
The circulating oil supply method returns the oil to the felt (low temperature) below it and then supplies it to the transfer surface, which is advantageous in terms of temperature rise of the rotating part.

Lubricating oil can be easily replenished by removing the lids at both ends of the gyro case.

Since the diameter of the contact portion of the refueling fitting with the felt can be reduced, even if the contact pressure between the two is increased, the friction torque can be small, which is advantageous in terms of temperature rise and starting torque of the gyro.

Also, since the felt acts as a filter, clean lubricating oil can be supplied.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of an example of the present invention, FIG. 2 is an enlarged view of a part thereof, and FIGS. 3 and 4 are sectional views of conventional examples, respectively. In the figure, 4 is a rotating shaft, 5 and 6 are gyro cases, 7 and 8 are ball bearings, 9 and 10 are lids,
11 and 12 are bushes, 13 and 14 are seal fittings, 15 and 16 are oil supply fittings, and 20 to 23 are filters, respectively.

Claims (1)

[Scope of utility model registration request] A lubricating fitting attached to the end of the conical rotating shaft that expands from the outside toward the inner ring of the ball bearing of the rotating shaft of a marine gyro, and a felt impregnated with lubricating oil that partially contacts the small diameter portion of the fitting. and a bushing disposed on the outer ring of the ball bearing and having a groove and a hole in the lower part for draining lubricating oil;
A bearing lubricating oil supply device for a marine gyro, characterized in that it comprises a seal fitting having a conical shape that tapers away from the ball bearing and is attached to the inner side of the ball bearing of the rotating shaft.