JPH0882323A - Rotaly shaft supporting device for automobile transmission - Google Patents

Abstract

PURPOSE: To prevent seal member from being damaged because of the end face of a rotary shaft coming in contact with the inner peripheral edge of the seal member in the case of inserting the rotary shaft through the inside of the seal member. CONSTITUTION: The inner peripheral side part of seal member 8 is inclined toward the end face of a roller 7 so as to shorten the distance between the inner peripheral edge of the seal member 8 and the end face of the roller 7. As a result, even if a rotary shaft 1 is inserted in the silightly inclined state through the inside of the seal member 8, the end face of the rotary shaft 1 hardly comes in contact with the inner peripheral edge of the seal member so as to prevent the damage of the seal member 8.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The supporting device for a rotary shaft of an automobile transmission according to the present invention is used for rotatably supporting a rotary shaft incorporated in an automobile transmission with respect to a casing of the transmission.

[0002]

2. Description of the Related Art A plurality of rotary shafts for transmitting a driving force are incorporated inside a transmission for an automobile, and they are rotatably supported inside a casing through roller bearings.

5 to 6 schematically show an example of such a supporting device for a rotary shaft of an automobile transmission.

Reference numeral 1 denotes a rotary shaft for transmitting the driving force of the engine. A gear 2 is fixedly provided on the outer peripheral surface of the intermediate portion of the rotary shaft 1, and the gear 2 is provided at the intermediate portion of another rotary shaft (not shown). By engaging with another gear fixed to the outer peripheral surface, the rotary shaft 1
The drive force can be transmitted between the gear and the other rotary shaft while shifting.

Reference numeral 3 denotes a holding portion formed inside the casing, and an outer ring 5 constituting a cylindrical roller bearing 4 is fitted and fixed inside the holding portion 3. The inner raceway 6 formed on the inner circumferential surface of the intermediate portion of the outer ring 5 and the outer raceway 17 formed on the outer circumferential surface of the rotating shaft 1 or the outer circumferential surface of the inner ring 16 fitted onto the rotating shaft 1 A plurality of rollers 7 and 7 are provided between them, respectively, to rotatably support the rotary shaft 1 inside the holding portion 3.

In an actual case, the cylindrical roller bearing 4
As shown in FIG. 7, a pair of seal members 8 each having a circular ring shape are formed on both ends of the inner peripheral surface of the outer ring 5,
By supporting the outer peripheral edge of 8 and slidingly contacting the inner peripheral edge of each seal member 8 with the outer peripheral surface of the rotary shaft 1, foreign matter can enter the rolling parts of the plurality of rollers 7, 7. To prevent.

[0007]

However, in the case of the conventional supporting device for the rotary shaft of the transmission for an automobile constructed as described above, the existence of the gear 2 fixed on the outer peripheral surface of the intermediate portion of the rotary shaft 1. And the shape of the sealing materials 8 and 8 causes the following problems.

That is, when the support device for the rotary shaft is constructed,
Usually, after mounting the cylindrical roller bearing 4 on the holding portion 3 in the casing, the rotary shaft 1 is placed inside the cylindrical roller bearing 4.
It is inserted directly or with the inner ring 16 held. In this way, when the rotary shaft 1 is inserted inside the cylindrical roller bearing 4 mounted inside the holding portion 3 in advance, the gear 2 fixed on the outer peripheral surface of the intermediate portion of the rotary shaft 1 is brought close to the rotary support portion. With this, when the rotary shaft 1 is inserted into the cylindrical roller bearing 4, the gear 2 interferes and the inserted portion cannot be visually observed.
Since it is difficult to prevent the shaft from inclining inside the plurality of rollers 7, 7, it is inevitable that it becomes difficult to hold the rotary shaft 1 concentrically with the outer ring 5.

In the case of the cylindrical roller bearing 4 which constitutes the above-described conventional supporting device for the rotary shaft of the automobile transmission, the rollers 7, 7 are provided.
When the rotary shaft 1 is inserted inside the cylindrical roller bearing 4 while the rotary shaft 1 is tilted as described above because the distance L between the seal material 8 and the inner peripheral edge of the seal material 8 is relatively large, The end surface of the rotating shaft 1 or the inner ring 16 may collide with the inner surface of the seal material 8 on the outlet side (the right side in FIGS. 5 to 6) and damage the seal material 8.

The supporting device for the rotary shaft of the automobile transmission according to the present invention eliminates the above-mentioned inconvenience.

[0011]

A support device for a rotary shaft of a transmission for a vehicle according to the present invention has a gear fixed to an outer peripheral surface of an intermediate portion thereof, similarly to the conventional support device for a rotary shaft described above. A rotary shaft support device for an automobile transmission, which rotatably supports a rotary shaft constituting a transmission near a gear with respect to a casing, and has an inner raceway at an intermediate portion of an inner peripheral surface. An outer race internally fitted and fixed to a holding portion formed in a part of the casing, and an outer race formed by the inner raceway and the outer circumferential surface of the rotary shaft or the outer circumferential surface of the inner race fitted on the rotary shaft. A plurality of rollers provided between and each of which is formed in a ring shape,
Each of the outer peripheral edges is supported by both ends of the inner peripheral surface of the outer ring, and is composed of a pair of seal members.

By inclining the inner peripheral portion of the sealing material toward the plurality of rollers, the inner peripheral edge of each sealing material is brought close to the plurality of rollers.

[0013]

The function of rotatably supporting the rotary shaft inside the casing by the rotary shaft supporting device of the automotive transmission of the present invention constructed as described above is the same as that of the conventional rotary shaft support described above. It is similar to the case of the device.

However, in the case of the rotary shaft supporting device for the automobile transmission of the present invention, the inner peripheral edges of the pair of seal members supported at both ends of the inner peripheral surface of the outer ring are close to the plurality of rollers. Therefore,
Even when the inside of the cylindrical roller bearing is inserted with the rotary shaft inclined, the end face of the rotary shaft and the inner peripheral edge of the seal material on the outlet side are less likely to collide with each other, and the seal material is less likely to be damaged.

[0015]

The present invention will be described in more detail with reference to the illustrated embodiments. FIG. 1 is a partial sectional view showing a first embodiment of the present invention.

Reference numeral 1 denotes a rotary shaft in which a gear 2 (see FIG. 5; omitted in FIG. 1) is fixedly provided in an intermediate portion for transmitting the driving force of the engine. The rotary shaft 1 is formed inside a casing. It is rotatably supported inside the held portion 3 via a cylindrical roller bearing 4.

An outer ring 5 having an inner raceway 6 formed in the middle portion of the inner circumferential surface is held by a retainer 9, and the outer raceway 5 is held inside the outer race 5 while the outer raceways are in contact with the inner raceway 6. A cylindrical roller bearing 4 composed of a plurality of rollers 7 provided on both ends of an inner peripheral surface of an outer ring 5 supports outer peripheral edges of a pair of sealing members 8 formed in a circular ring shape. At the same time, the inner peripheral edges of the respective sealing members 8 and 8 are brought into sliding contact with the outer peripheral surface of the rotating shaft 1 to prevent foreign matter from entering the rolling portions of the plurality of rollers 7.

The respective sealing members 8 and 8 are constituted by reinforcing rubber members 11 and 11 for sealing with core members 10 and 10 made of metal plates. The outer peripheral edge portions of the core materials 10 and 10 are curled outward to support portions 12 and 1
2, the respective support portions 12, 12 are plastically deformed from the chain line state to the solid line state, and are engaged with the locking grooves 13, 13 formed at both ends of the inner peripheral surface of the outer ring 5, whereby the respective seal members 8, 8 is supported inside the outer ring 5.

The above-mentioned structure is the same as that of the conventional supporting device for the rotary shaft of the transmission for an automobile, but in the case of this embodiment, the core members 10 and 10 constituting the respective sealing members 8 and 8 are arranged. By inclining the inner peripheral portions 10a, 10a toward the plurality of rollers 7 and inclining the rubber members 11, 11 reinforced by the core members 10, 10 in the same direction, the sealing members 8, 8 The inner peripheral edges of the rubber members 11, 11 constituting the above are close to the end faces of the plurality of rollers 7.

The operation itself for rotatably supporting the rotating shaft 1 inside the casing by the supporting device for the rotating shaft of the automotive transmission of the present invention, which is constructed as described above, is the same as that for the conventional rotating shaft described above. This is the same as in the case of the supporting device, and there are a plurality of pluralities between the outer peripheral surface of the rotating shaft 1 and the inner raceway 6 formed on the inner peripheral surface of the outer ring 5 fitted and fixed to the holding portion 3 in the casing. The rolling of the roller 7 allows the rotation of the rotating shaft 1.

However, in the case of the supporting device for the rotary shaft of the automobile transmission of the present invention, the inside of the rubber members 11, 11 constituting the pair of seal members 8, 8 supported at both ends of the inner peripheral surface of the outer ring 5. Since the peripheral edge and the end faces of the plurality of rollers 7 are close to each other, when the transmission is assembled, even if the rotary shaft 1 is inserted in the cylindrical roller bearing 4 while the rotary shaft 1 is inclined, End face 1a
The inner peripheral edge portion of the rubber material 11 forming the sealing material 8 on the outlet side (the right side in FIG. 1) is less likely to collide, and the sealing material 8 is less likely to be damaged.

That is, in the case of the cylindrical roller bearing 4 incorporated in the rotary shaft supporting device of the automobile transmission of the present invention, the distance 1 between the inner peripheral edge of the rubber material 11 and the end face of the rubber material 11 is incorporated in the conventional device. For example, a cylindrical roller bearing 4 as shown in FIG.
Is sufficiently smaller than the distance L in the case of (l <L)
Therefore, even if the rotary shaft 1 inserted through the insides of the plurality of rollers 7 is slightly inclined, the chamfered portion 15 formed at the end of the rotary shaft 1 is dislocated from the inner peripheral edge of the rubber material 11, and the end face 1 of the rotary shaft 1 is removed.
The a does not collide with the inner peripheral edge of the rubber material 11.

For this reason, even if the portion into which the rotary shaft 1 is inserted cannot be visually observed due to the gear 2 fixed to the intermediate portion of the rotary shaft 1, the rubber material 11 forming the seal material 8 is unlikely to be damaged. It can be reduced.

Next, FIG. 2 shows a second embodiment of the present invention. In the case of the present embodiment, the bent portions 14, 14 formed on the outer peripheral edge portions of the core materials 10, 10 constituting the seal materials 8, 8.
Are fitted and fixed to both ends of the inner peripheral surface of the outer ring 5. Further, the rubber members 11, 11 whose middle portions are bent in a V shape are joined to the inner peripheral edge portions of the core members 10, 10. Other configurations and operations are the same as in the case of the first embodiment described above.

Next, FIG. 3 shows a third embodiment of the present invention. This embodiment is a modification of the second embodiment and is the same as the above-mentioned second embodiment except that the core material 10 and the rubber material 11 forming the sealing material 8 are slightly different in cross-sectional shape. .

Further, in the case of the fourth embodiment shown in FIG. 4, the support portions 12 and 12 formed by curling the outer peripheral edge portion and the locking groove 13 formed on the inner peripheral surface of the end portion of the outer ring 5, The core members 10, 1 supported on the inner peripheral surface of the outer ring 5 by engagement with the outer ring 5.
The rubber material 11, 11 is joined to the inner peripheral edge portion of 0 to form the sealing material 8, 8. Other configurations and operations are the same as those in the above-described first to third embodiments.

In each of the above-mentioned embodiments, the outer peripheral surface of the rotary shaft 1 is directly used as the outer track, but the structure is such that the inner ring 16 is externally fitted and fixed to the rotary shaft 1 as shown in FIG. Even if
It can be implemented in almost the same manner.

[0028]

Since the supporting device for the rotary shaft of the automobile transmission of the present invention is constructed and operates as described above, the end face of the rotary shaft is located at the inner peripheral edge of the seal material on the outlet side during the assembling work. It is possible to effectively prevent the sealing material from hitting and damaging the sealing material.

[Brief description of drawings]

FIG. 1 is a partial sectional view showing a first embodiment of the present invention.

FIG. 2 is a sectional view of a roller bearing used in the second embodiment.

FIG. 3 is a cross-sectional view of a sealing material used in the third embodiment.

FIG. 4 is a sectional view of a roller bearing used in the fourth embodiment.

FIG. 5 is a cross-sectional view schematically showing a first example of a supporting device for a rotary shaft of a transmission for an automobile, which is a target of the present invention.

FIG. 6 is a sectional view schematically showing the second example.

FIG. 7 is a half sectional view showing a roller bearing used in a conventional rotary shaft support device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 rotating shaft 1a end face 2 gear 3 holding part 4 cylindrical roller bearing 5 outer ring 6 inner race 7 roller 8 sealing material 9 retainer 10 core material 10a inner peripheral part 11 rubber material 12 support part 13 locking groove 14 bending part 15 Chamfer 16 Inner ring 17 Outer track

Claims (1)

[Claims] 1. A rotary shaft of a transmission for an automobile, wherein a gear is fixedly provided on an outer peripheral surface of an intermediate portion, and a rotary shaft constituting a transmission of the automobile is rotatably supported by a casing in the vicinity of the gear. A support device, an outer ring having an inner raceway at an intermediate portion of an inner circumference surface and internally fitted and fixed to a holding portion formed in a part of the casing, the inner raceway, and an outer peripheral surface of the rotating shaft. Alternatively, a plurality of rollers provided between the outer raceway formed by the outer peripheral surface of the inner ring fitted onto the rotating shaft and each of the rollers are formed in a circular ring shape, and the outer peripheral edges of the rollers are both end portions of the inner peripheral surface of the outer ring. Composed of a pair of sealing materials supported by, and by inclining the inner peripheral portion of the sealing material toward the plurality of rollers, the inner peripheral edge of each sealing material is brought close to the plurality of rollers. Supporting device for rotating shafts of automobile transmissions.