JPH0632747U - Tapered roller bearing device - Google Patents

Abstract

(57) [Abstract] [Purpose] An object of the present invention is to provide a highly reliable tapered roller bearing device that can be inspected and replenished with grease reliably and easily. [Structure] Inner race 20a and this inner race
A tapered roller 20b arranged on the outer peripheral surface of the roller 20a at a predetermined interval, and a roller provided outside the tapered roller 20b and rotatably mounted on the inner race 20a via the tapered roller 20b. An outer race 20c, and the tapered roller 2 of the inner race 20a.
At a position corresponding to the end surface on the large diameter side of 0b, a flange portion 23a provided on the outer peripheral portion is extended near the end surface of the outer race 20c to connect the inner race 20a and the outer race 20c. An oil retainer 23, which prevents the grease 13 enclosed between them from flowing out, is detachably provided.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a tapered roller bearing device which is attached to a knuckle of a front wheel of an automobile and rotatably holds an axle hub, for example.

[0002]

[Prior art]

 For example, a track wheel bearing receives a vertical load, a vertical load, and a lateral load that occurs when turning, so a structure that uses two tapered roller bearings with the same outer diameter and a large load capacity is used in combination. Widely used.

That is, as shown in FIG. 2, the front wheel axle includes a knuckle 3 provided at the tip of an axle shaft 1 so as to be steerable in a horizontal plane via a kingpin 2. Inner races 4a and 5a (inner ring) of the inner tapered roller bearing 4 and the outer tapered roller bearing 5 are fitted onto the base end and the tip of the spindle portion 3a (knuckle spindle) of the knuckle 3, respectively. There is.

On the other hand, the outer races 4b and 5b (outer rings) of the inner tapered roller bearing 4 and the outer tapered roller bearing 5 are provided on the inner peripheral surface of an axle hub 6 provided on the outer side in the radial direction of the knuckle spindle 3a. It has been inserted. A brake drum 7 to which a tire is attached is fixed to the outer peripheral surface of the axle hub 6 at its axially outer end. A front brake assembly 8 is incorporated in the space defined by the outer peripheral surface of the axle hub 6 and the inner peripheral surface of the brake drum 7.

On the other hand, the lubrication of the inner and outer tapered roller bearings 4 and 5 is performed by the grease filled around the rollers 4c and 5c and the space 6a defined in the central portion of the axle hub 6. The enclosed grease is used. Further, in order to prevent the outflow of grease and the intrusion of muddy water, a grease cap 9 is provided on the axially outer end surface of the axle hub 6, and the inner end surface thereof is shown in FIGS. 2 and 3 (a). An oil seal 10 is provided.

When performing maintenance on the two tapered roller bearings 4 and 5, the axle hub 6, the brake drum 7, and the front brake assembly 8 are removed from the front wheel axle.

That is, as shown in FIG. 3 (a), the inner tapered roller bearing 4 is sandwiched between the knuckle 3 and the axle hub 6, and the axle hub 6 is indicated by an arrow (a). By removing it in the direction, the rollers 4c are exposed on the surface of the inner race 4a as shown in FIG. Reference numeral 11 in the drawing is a cage for preventing the rollers 4c from coming into contact with each other.

Next, the worker applies grease 13 with the grease gun 12 at this time. At the same time, the rollers 4c and the inner race 4a are checked for damage. Then, the outer race 4b and the axle hub 6 are assembled again to complete the maintenance.

[0009]

[Problems to be solved by the device]

 By the way, conventionally, in order to effectively prevent the outflow of the grease 13 and the inflow of muddy water from the tapered roller bearing 4, an oil retainer (a grease outflow prevention part) is provided. In the above-mentioned conventional example, as shown in FIG. 3, the rear end side of the inner race 4a of the inner tapered roller bearing 4 is extended upward, and a flange is provided on the upper part of the inner race 4a to provide an oil retainer. 14 is integrally formed. By thus forming the oil retainer 14 integrally with the inner race 4a, the tapered roller bearing 4 is downsized.

However, this oil retainer 14 is effective in preventing the grease 13 from flowing out, but on the contrary, it becomes an obstacle when the grease 13 is enclosed. It may be difficult to encapsulate the grease 13 in the portion indicated by A.

Further, the roller 4c is apt to be damaged by the load being applied to the end surface on the large diameter side indicated by A in the structure, but the oil retainer 14 becomes an obstacle when checking the damage of this portion. For this reason, there have been cases where sufficient maintenance cannot be performed. The present invention has been made in view of such circumstances, and an object thereof is to provide a tapered roller bearing in which grease can be easily replenished and damages can be easily inspected.

[0012]

[Means for Solving the Problems]

 This invention is directed to an inner race, a tapered roller arranged on the outer peripheral surface of the inner race at a predetermined interval, and the tapered roller provided on the outer side of the tapered roller via the tapered roller. In a tapered roller bearing device comprising an outer race rotatably provided with respect to the inner race, an outer peripheral portion is provided at a position corresponding to an end surface of the inner race on the large diameter side of the tapered roller. Is provided in the vicinity of the end face of the outer race, and a retainer portion is detachably provided to prevent the grease enclosed between the inner race and the outer race from flowing out. It is what

[0013]

[Action]

 According to this structure, by removing the retainer portion from the inner race, it is possible to inspect for damage on the large diameter side end surface of the tapered roller and to fill this portion with grease.

[0014]

【Example】

 An embodiment of the present invention will be described below with reference to FIG. The same components as those of the conventional example are designated by the same reference numerals and the description thereof will be omitted.

The tapered roller bearing device 20 (hereinafter, “conical roller bearing”) of the present invention is used, for example, as the outer tapered roller bearing 4 (shown in FIG. 2) of the front wheel axle. The tapered roller bearing 20 includes an inner race 20a fitted on the spindle portion 3a of the knuckle 3 and a plurality of tapered rollers arranged on the surface of the inner race 20a at a predetermined interval in the circumferential direction. 20b, a retainer 21 for restricting contact between the tapered rollers 20b, ..., and an outer race 20c fitted on the inner peripheral surface of the axle hub 6 while being fitted on the tapered roller 20b. .

Further, one end portion 22 of the inner race 20a extends upward, and a ring-shaped oil retainer 23 (retainer portion) is provided on the upper end of the one end portion 22 so as to be detachable by screwing. ing. A collar portion 23a protruding in the direction of the roller 20b is formed on the outer peripheral portion of the retainer 23 located near the end surface of the outer race 20c, and the grease 13 enclosed in the tapered roller bearing 20 (see FIG. It is designed to prevent the outflow of (b)).

At the time of maintenance, the outer race 20c and the axle hub 6 are removed in the direction shown by the arrow (a) in the figure, as in the conventional example. As a result, as shown in FIG. 1 (b), the rollers 20b ... Are exposed on the inner race 20a. Then, the oil retainer 23 is removed from the inner race 20a. As a result, the end surface of the roller 20b on the large diameter side can be exposed.

Next, the operator inspects the large diameter surface of the roller 20b and the portion of the inner race 20a indicated by A in the figure for damage. Next, the grease gun 12 is used to replenish the tapered roller 20b with grease 13. Since the large diameter surface of the tapered roller 20b is exposed, the grease 13 can be easily replenished to the inside portion A of the cage 21 as well.

According to such a configuration, unlike the conventional example, it is possible to expose the end surface of the tapered roller 20b on the large diameter side, that is, the portion that is particularly easily damaged and needs to be replenished with the grease 13. As a result, this portion can be inspected and the grease 13 can be supplied easily and effectively, so that maintainability is improved and reliability is also improved. Further, since the oil retainer 23 is continuously provided on the one end portion 22 of the inner race 20a, the size of the apparatus does not increase. The present invention is not limited to the above-described embodiment, but can be variously modified without changing the gist of the invention.

For example, in the above-described one embodiment, the tapered roller shaft home device is provided on the front wheel axle, but the same effect can be obtained by providing it on the rear wheel axle. Further, in the above-described embodiment, the oil retainer 23 is screwed to the inner race 20a, but the present invention is not limited to this. For example, instead of screwing, they may be fitted together. Alternatively, the ring-shaped oil retainer 23 may be divided into two in the diametrical direction, and the divided body may be mounted from the outer side in the radial direction of the inner race 20a and screwed.

[0021]

[Effect of device]

 As described above, the present invention is provided with an inner race, a tapered roller arranged on the outer peripheral surface of the inner race at a predetermined interval, and an outer side of the tapered roller. A tapered roller bearing device comprising an outer race rotatably provided with respect to the inner race via tapered rollers, which corresponds to an end surface of the inner race on the large diameter side of the tapered roller. At this position, the retainer part that extends the outer peripheral part near the end face of the outer race and prevents the grease enclosed between the inner and outer races from flowing out is attached or detached. It is provided freely.

According to this structure, by removing the retainer portion, it is possible to expose the end surface on the large diameter side of the tapered roller, which is particularly liable to be damaged and in which the grease 13 needs to be replenished, Inspection of this part and replenishment of grease can be performed easily and effectively, and reliability is improved.

[Brief description of drawings]

FIG. 1A is a vertical sectional view showing an embodiment of the present invention, and FIG. 1B is a vertical sectional view showing the same during maintenance.

FIG. 2 is a vertical sectional view showing a front wheel axle.

FIG. 3A is a vertical cross-sectional view showing a conventional example, and FIG.
Similarly, the longitudinal cross-sectional view showing the time of maintenance.

[Explanation of symbols]

13 ... Grease, 20 ... Tapered roller bearing (conical roller bearing device), 20a ... Inner race, 20b ... Tapered roller, 2
0c ... outer race, 22 ... oil retainer (retainer part).

Claims (1)

[Scope of utility model registration request] 1. An inner race, a tapered roller arranged on the outer peripheral surface of the inner race at a predetermined interval, and the tapered roller provided outside the tapered roller via the tapered roller. Outer layer rotatably attached to the inner layer
In a tapered roller bearing device comprising: an outer race, the outer peripheral portion is extended to a position near the end surface of the outer race, at a position corresponding to the end surface of the inner race on the large diameter side of the tapered roller. A tapered roller bearing device, characterized in that a retainer portion for preventing the grease enclosed between the inner race and the outer race from flowing out is detachably provided.