JPH0735778Y2 - Grease greasing device for vehicle propulsion shaft support bearings - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a grease greasing device for supplying grease to a vehicle propulsion shaft support bearing.

[Conventional technology]

Generally, the propelling shaft of a vehicle is rotatably supported by a support bearing 3 having a spline shaft 1 interposed between the spline shaft 1 and a center bearing rubber 2 as shown in FIG. 56-73631). A companion flange 4 is connected to the spline shaft 1 via a spline connection.

The support bearing 3 is filled with grease 5 when it is assembled in order to ensure smooth rotation.

[Problems to be solved by the device]

However, since such a structure limits the space, it is possible to lubricate only a fixed amount and, if necessary, lubricate. Moreover, when the temperature inside the support bearing 3 rises and the internal pressure rises, the seal lip 6,
There was a risk that grease 5 would flow out from 7. As a technique related to the present invention, the technique disclosed in Japanese Utility Model Laid-Open No. 57-33322 has been proposed.

The present invention has been made in order to solve the above-mentioned drawbacks, and the purpose of the invention is to allow grease lubrication as needed, grease does not flow out even if the temperature rises, and the life of the support bearing can be extended. A grease lubrication device for a vehicle propulsion shaft support bearing.

[Means for Solving the Problems]

The present invention to achieve the above object is to provide a companion flange with a grease nipple, and to form a notch grease passage in a spline where the companion flange and the spline shaft are fitted to each other to form a spline shaft held by an outer race, an inner race and a seal lip. In the grease lubrication device for the vehicle propulsion shaft support bearing that lubricates the bearings, the grease reservoir is formed at the position of the above-mentioned inner race or the spline shaft where the inner race is provided, and the grease is centrifugally removed from the grease reservoir. It is characterized in that the inner race is provided with a grease supply passage for supplying grease to the bearing and returning from the bearing side to the grease reservoir when the bearing holding internal pressure becomes high.

[Action]

Grease is supplied from the grease nipple to the grease reservoir through the notched grease passage, and from the grease reservoir is centrifugally supplied to the bearing through the grease supply passage. On the other hand, when the internal pressure inside the bearing holding becomes high, the grease is returned to the grease reservoir through the grease supply passage and the bearing is constantly supplied with a constant amount of grease.

〔Example〕

 Hereinafter, the present invention will be described in detail with reference to the drawings.

FIG. 1 shows a grease supply device for a vehicle propulsion shaft support bearing according to the present invention. 10 is a spline shaft of the vehicle propulsion shaft, and 11 is a center bearing rubber. Spline shaft 10 and center bearing rubber
A support bearing 12 is interposed between the spline shaft 10 and 11, and the spline shaft 10 is rotatably supported by the support bearing 12. The support bearing 12 includes a bearing (for example, a ball bearing) 13, an outer race 14 and an inner race 15 sandwiching the bearing 13 above and below, and a pair of seal lips 16 and a clip 17 sandwiching the bearing 13 left and right. . Also support bearing 12
The outer side of the slinger 20 is constituted by a slinger 20 via a retainer 18 and a seal lip 19. The spline shaft 10 includes a male spline 21 provided on the spline shaft 10 side and a female spline provided on the companion flange 22 side.
The companion flange 22 is connected via the spline connection with 23 and the support bearing 12.

The companion flange 22 is provided with a grease nipple 24 for injecting and filling grease, and the female spline 23 on the side of the companion flange 22 where the spline shaft 10 and the companion flange 22 are fitted has one ridge as shown in FIG. It is notched and a notched grease passage 25 is formed therein. Also the inner race 15 of the support bearing 12
At the position of the spline shaft 10 where is provided, a grease reservoir portion 26 for temporarily storing the grease supplied from the notched grease passage 25 is formed. A grease supply passage 28 for supplying grease 27 is formed on the outer circumference of the bearing 13 in the inner race 15.

When supplying grease 27 to the outer periphery of the bearing 13, grease is injected into the grease nipple 24 provided on the companion flange 22, and the notch grease formed on the female spline 23 of the companion flange 22 is supplied from the grease nipple 24. Spline shaft 10 through passage 25
The grease is temporarily stored in the grease reservoir 26 formed in the inner race 15, and the grease 27 is supplied to the outer periphery of the bearing 13 through the grease supply passage 28 formed in the inner race 15 by the centrifugal force that rotates. It is greasy.
Therefore, grease 27 is constantly filled around the bearing 13,
It rotates smoothly.

On the other hand, when the inside pressure of the support bearing 12 rises due to the temperature rise, it is returned to the grease reservoir 26 through the grease supply passage 28. Therefore, the grease is prevented from flowing out from the seal lips 16 and 19 inside and outside the support bearing 12, and the bearing 13 is always covered with a constant amount of grease 27, so that the life of the support bearing 12 can be extended.

In the above embodiment, the grease reservoir portion 26 for temporarily storing the grease is formed at the position of the spline shaft 10 where the inner race 15 is provided, but as shown in FIG. The grease reservoir 29 may be formed in the same, and the same effect can be obtained.

[Effect of device]

As described above, according to the present invention, the provision of the grease lubrication path for supplying grease from the outside to the inside of the support bearing enables grease lubrication as needed, and grease leakage even if the temperature rises. And the life of the support bearing can be extended.

[Brief description of drawings]

1 is a sectional view of an embodiment of the present invention, and FIG. 2 is a sectional view of FIG.
II-II line sectional view, FIG. 3 is a sectional view of an essential part of another embodiment of the present invention, and FIG. 4 is a sectional view of a conventional example. 10 …… Spline shaft 13 …… Bearing 15 …… Inner race 22 …… Companion flange 23 …… Female spline 24 …… Grease nipple 25 …… Notch grease passage 26,29 …… Grease reservoir 27 …… Grease 28 …… Grease supply path.

Claims (1)

[Scope of utility model registration request] 1. A companion flange is provided with a grease nipple, and a notch grease passage is formed in a spline where the companion flange and the spline shaft are fitted to lubricate a bearing of the spline shaft held by an outer race, an inner race and a seal lip. In a grease lubrication device for a vehicle propulsion shaft support bearing, a grease reservoir is formed at the position of the above-mentioned inner race or the spline shaft where the inner race is provided, and grease is lubricated from the grease reservoir to the bearing by centrifugal force. A grease supply device for a vehicle propulsion shaft support bearing, wherein a grease supply passage for returning from the bearing side to the grease reservoir is formed in the inner race when the bearing holding internal pressure becomes high.