JPH09202151A - Propeller shaft for vehicles - Google Patents

Abstract

(57) 【Abstract】 PROBLEM TO BE SOLVED: To avoid fluctuation of rotational balance of a propeller shaft for a vehicle and prevent sound and vibration from being transmitted to the vehicle. SOLUTION: The outer peripheral portion of the other end portion of the propeller shaft 1 is supported by a differential carrier 19 via a metal bush 21, and the rotation center axis of the other end portion side of the propeller shaft 1 is fixed. Thus, for example, the rotation center axis of the other end of the propeller shaft 1 and the bevel pinion shaft 11
Even if there is a deviation from the center axis of rotation, the deviation can be avoided and the propeller shaft 1 can be rotated in a well-balanced manner. In addition, the circlip attached to the tip of the bevel pinion shaft 11 is expanded inside the fitting hole and locked inside to prevent the other end of the propeller shaft 1 from coming off the bevel pinion shaft 11. You can

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention supports the outer periphery of the end portion of a propeller shaft on the side of a differential gear (differential device) by a differential carrier.
The present invention relates to a vehicle propeller shaft in which a propeller shaft and a rotary shaft of a differential gear are spline-coupled to each other.

[0002]

2. Description of the Related Art Conventionally, a transmission and a differential gear of a vehicle and a propeller shaft which is arranged between the transmission and the differential gear and transmits power are connected as follows. That is, the flanges of the universal joints provided at both ends of the propeller shaft are brought into contact with the flange members provided at the ends of the transmission and the differential gear, respectively, and the corresponding contact portions are fixed by bolts and nuts. .

Further, as shown in FIG. 5, the tip of the universal joint 3 at one end of the propeller shaft 1 (transmission 2 side, the same applies hereinafter) is formed in a sliding yoke 3a (a tubular member movable in the axial direction). , The rotary shaft 5 of the transmission 2 is fitted into a hole provided with an axial spline 4 (may be serration) on the inner wall of the yoke 3a,
The outer peripheral portion of the yoke 3a is held by the transmission case 7 via the metal bush 6 (see also FIG. 6), and the flange of the universal joint 9 at the other end portion of the propeller shaft 1 (differential gear 8 side, the same applies hereinafter). 10 (Fig. 7
(See also FIG. 7, the universal joint 9 shown in FIG. 7 is obtained by rotating the universal joint 9 shown in FIG. 8 by 90 degrees), and a flange member for engaging the bevel pinion shaft 11 of the differential gear 8 with the flange member.
There is also one in which the two are brought into contact with each other, and both are fastened together by bolts 13 and nuts (not shown) to be integrally held. The bevel pinion shaft 11 transmits the power from the propeller shaft 1 to each gear of the differential gear 8.

A flange 10 of the propeller shaft 1;
The connecting portion with the flange member 12 connected to the bevel pinion shaft 11 will be described in detail. As shown in FIG. 7, the end surface of the flange 10 of the propeller shaft 1 has a protrusion 14 for fitting.
Are formed in the bolt holes 15 formed in the flange 10 at four locations (not shown) around the protrusion 14 and the bolts are formed.
13 is inserted.

Further, as shown in FIG. 7, the bevel pinion shaft 11 and the flange member 12 of the differential gear 8 are engaged with each other by a spline (may be serration) 11a so that power can be transmitted, and are tightened by a nut 16 to be integrated. It is fixed to.

As shown in FIG. 7, a concave portion 17 into which the protruding portion 14 of the flange 10 is fitted is formed on the end surface of the flange member 12. Further, bolts 13 inserted through the bolt holes 15 of the flange 10 are inserted through bolt holes 18 provided at four locations around the recess 17.

The flange member 12 engaged with the bevel pinion shaft 11 and the flange 10 of the propeller shaft 1 are fixed in contact with each other by fixing the other end of the propeller shaft 1 to the sliding yoke 3a. When the propeller shaft 1 is subjected to an unexpected force, the sliding yoke 3a and the like are largely moved, and the sliding yoke 3a and the rotary shaft 5 of the transmission 2 are disengaged from each other. This is because there is a risk. In order to prevent this coming off, the flange 10 of the propeller shaft 1 is fixed to the flange member 12 of the bevel pinion shaft 11 so that the propeller shaft 1 does not move.

Further, a propeller shaft 1 for transmitting power
Is machined in a balanced and precise manner so that it can rotate smoothly even at high speeds. When the propeller shaft 1 is assembled to the vehicle body, the rotary shaft 5 of the transmission 2 and the bevel pinion shaft 11 of the differential gear 8 are connected together with their shaft cores (hereinafter, referred to as the rotation center shafts) (see FIG. 6 straight line L). The arrow in FIG. 6 indicates the rotation of the propeller shaft 1.

[0009]

In the prior art described above, the propeller shaft 1 itself is machined in a balanced and accurate manner as a single item, but the propeller shaft 1 is connected to the rotary shaft of the differential gear 8. When this is done, that is, the flange member in which the flange 10 of the universal joint 9 on the other end side of the propeller shaft 1 is engaged with the bevel pinion shaft 11 of the differential gear 8
When coupled to 12, the rotation center axis A of the coupling portion of the flange 10 and the flange member 12 and the rotation center axis B of the bevel pinion shaft 11 are displaced as shown in FIG. There was a problem that the rotation balance was lost. This is because the bevel pinion shaft 11 and the flange member 12 are connected by the spline 11a for power transmission,
This is because there is some play (play) in this joint.

When the balance of the rotation of the propeller shaft 1 is lost in this way, there is a problem that when the propeller shaft 1 rotates at high speed, the rotation of the propeller shaft 1 fluctuates and sound or vibration is transmitted to the vehicle. In order to avoid this, the flange member 12 and the bevel pinion shaft 11 are matched in shape, and the bevel pinion shaft 11 is press-fitted into the flange member 12 so as to eliminate play. Due to the interposition, it was difficult to surely avoid mutual deviation of the rotation center axes.

The present invention has been made to solve the above-mentioned problems, and both ends of a propeller shaft are formed as movable sliding yokes, and the sliding yoke on the other end side of the propeller shaft is formed by a differential carrier. By supporting and fixing the rotation center axis, this prevents fluctuations in the rotation balance of the propeller shaft,
An object of the present invention is to provide a vehicle propeller shaft in which sound and vibration are not transmitted to the vehicle.

[0012]

According to a first aspect of the present invention, there is provided a vehicle propeller shaft for transmitting power between a transmission and a differential gear,
One end of the propeller shaft is supported by a transmission case, and the other end is supported by a differential carrier via bearings.

As described above, according to the first aspect of the present invention, one end of the propeller shaft that transmits power between the transmission and the differential gear, that is, the transmission side is supported by the transmission case via the bearing, and the propeller shaft is supported. The rotation center shaft of one end of the propeller shaft is fixed, and the other end of the propeller shaft, that is, the differential gear side is supported by the differential carrier via a bearing to fix the rotation center shaft of the other end of the propeller shaft.

This prevents deviation of the rotation center axis between the transmission shaft and the propeller shaft and deviation of the rotation center axis between the propeller shaft and the differential gear shaft (bevel pinion shaft).

According to the second aspect of the present invention, the other end portion of the propeller shaft is supported at its outer peripheral portion by a differential carrier via a bearing, and a bevel pinion is provided inside a fitting hole formed in the propeller shaft in the axial direction. The shaft is inserted, and a circlip is attached to the tip of the bevel pinion shaft, the diameter of which is expanded and locked inside.

As described above, according to the second aspect of the invention, the outer peripheral portion of the other end portion of the propeller shaft is supported by the differential carrier via the bearing, and the rotation center shaft of the propeller shaft on the differential gear side is fixed. This avoids the deviation of the rotation center axis between the propeller shaft and the bevel pinion shaft.

Further, a circlip is attached to the tip of the bevel pinion shaft inserted through the fitting hole of the propeller shaft, and the circlip is expanded when the bevel pinion shaft is pushed into the fitting hole. The bevel pinion shaft is prevented from coming off by locking it inside the fitting hole.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the present invention understood from the description of claim 1, as shown in FIG. 2, one end portion of a vehicle propeller shaft 1 for transmitting power between a transmission 2 and a differential gear 8 is provided. The transmission case 7 is supported via bearings 6. Then, connect the other end of the propeller shaft 1 to the differential carrier.
19 is supported via a bearing 21.

In the present invention as understood from the second aspect, as shown in FIG. 3, the outer peripheral portion of the other end portion of the propeller shaft 1 is supported by the differential carrier 19 via the bearing 21. Further, the bevel pinion shaft 11 is fitted into the fitting hole 23 formed in the axial direction of the other end of the propeller shaft 1, and the diameter of the bevel pinion shaft 11 is expanded at the tip end thereof to fit inside the fitting hole 23. Attach the circlip 26 to be stopped.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, one embodiment of the present invention will be explained based on FIGS. 1 and 2 by giving the same reference numerals to the same members as in FIGS. This embodiment is characterized by the universal joint 3 at one end of the propeller shaft 1 and the universal joint 9 at the other end.
As shown in FIG. 1, the sliding yokes 3a and 9a are formed, and the sliding yoke 3a at one end is connected to the transmission case 7 and the sliding yoke 9a at the other end is connected to the differential carrier as shown in FIG. 19
Was supported by.

More specifically, one end of the propeller shaft 1, that is, the universal joint 3 on the transmission 2 side.
Is formed on the sliding yoke 3a, and the outer peripheral portion of the sliding yoke 3a serves as a metal bush 6 as a bearing.
While being supported by the transmission case 7 via the, the rotary shaft 5 of the transmission is fitted in the fitting hole 20 formed in the axial direction of the sliding yoke 3a and provided with the spline 4.

The rear end of the universal joint 9 on the side of the differential gear 8 at the other end of the propeller shaft 1 is formed on a sliding yoke 9a.
The outer peripheral portion of 9a is supported by the differential carrier 19 via a metal bush 21 as a bearing, and as shown in FIG.
As shown in FIG. 5, the small diameter shaft portion 11b having the spline of the bevel pinion shaft 11 of the differential gear 8 is fitted in the fitting hole 23 having the spline 22 formed in the axial direction of the sliding yoke 9a.

A stopper 25 is mounted between the small-diameter shaft portion 11b and the large-diameter shaft portion 11c of the bevel pinion shaft 11 via a nut 24 to prevent the sliding yoke 9a from being excessively fitted.

A circlip 26 for retaining is attached to the tip of the small-diameter shaft portion 11b of the bevel pinion shaft 11 fitted to the sliding yoke 9a. The circlip 26 expands in diameter when the tip of the small-diameter shaft portion 11b of the bevel pinion shaft 11 is fitted into the inside of the sliding yoke 9a, and functions as a retainer.

Next, the operation of this embodiment will be described. Universal joint 3 at one end of the propeller shaft 1 for transmitting power between the transmission 2 and the differential gear 8.
The outer peripheral portion of the sliding yoke 3a is supported by the transmission case 7 via the metal bush 6 to fix the rotation center axis of one end of the propeller shaft 1.

The outer periphery of the sliding yoke 9a of the universal joint 9 at the other end of the propeller shaft 1 is supported by the differential carrier 19 via the metal bush 21 so that the center of rotation of the other end of the propeller shaft 1 is supported. Fix the shaft.

By fixing the rotation center axes of both ends of the propeller shaft 1 in this manner, the rotation center axis between the rotation shaft 5 of the transmission 2 and one end of the propeller shaft 1 is deviated, and It is possible to avoid the deviation of the rotation center axis between the other end of the propeller shaft 1 and the bevel pinion shaft 11 of the differential gear 8.

For example, even if the bevel pinion shaft 11 of the differential gear 8 and the central shaft of the metal bush for receiving the sliding yoke 9a are deviated, this deviation is caused by the play between the flange member 12 and the spline connecting portion of the bevel pinion shaft 11. Will be absorbed by.

As a result, even during high-speed rotation, the propeller shaft 1 can be rotated while maintaining an accurate balance in a single piece, and this rotation can be input to the differential gear 8 for stable rotation. Can be transmitted.

Also, the fitting hole 23 of the sliding yoke 9a
When the bevel pinion shaft 11 is pushed into the fitting hole 23, the circlip 26 attached to the tip of the small diameter shaft portion 11b of the bevel pinion shaft 11 fitted in the
It is to be locked inside.

This makes it possible to prevent the other end of the propeller shaft 1 from coming off the small-diameter shaft portion 11b of the bevel pinion shaft 11. Thus, the propeller shaft 1
Since the other end portion of the propeller shaft 1 is prevented from coming off, it is possible to prevent the propeller shaft 1 from moving toward the differential gear 8 side and prevent one end portion of the propeller shaft 1 from coming off the rotary shaft 5 of the transmission 2.

Although the metal bush is used as the bearing in this embodiment, the bearing is not limited to this, and a bearing such as a roller bearing or a ball bearing may be used.

[0033]

According to the first aspect of the present invention, one end of the propeller shaft that transmits power between the transmission and the differential gear is supported by the transmission case via a bearing, and the center of rotation on the one end side of the propeller shaft is supported. The shaft is fixed, and the other end is supported by the differential carrier via a bearing to fix the rotation center shaft on the other end of the propeller shaft.

Thus, for example, the deviation of the rotation center axis between the transmission shaft and one end of the propeller shaft, and the deviation of the rotation center axis between the rotation shaft of the differential gear and the other end of the propeller shaft. Therefore, the propeller shaft can be rotated in a well-balanced manner, and sound or vibration can be prevented from being transmitted to the vehicle even at high speed rotation.

According to the second aspect of the present invention, the outer peripheral portion of the other end portion of the propeller shaft is supported by the differential carrier via a bearing, and the rotation center axis on the other end portion side of the propeller shaft is fixed. As a result, even if there is a deviation between the rotation center axis of the other end of the propeller shaft and the rotation center axis of the bevel pinion shaft, this deviation can be avoided and the propeller shaft can be rotated in a well-balanced manner. As a result, it is possible to prevent sound and vibration from being transmitted to the vehicle even during high-speed rotation.

When a circlip is attached to the tip of the bevel pinion shaft fitted in the fitting hole at the other end of the propeller shaft and the bevel pinion shaft is pushed into the fitting hole,
Since the diameter of the circlip is expanded and locked inside, it is possible to prevent the other end of the propeller shaft from coming off the bevel pinion shaft. Since the propeller shaft does not move in this way, it is possible to prevent one end of the propeller shaft from coming off the rotation axis of the transmission.

Further, in the invention of claim 2, the bevel pinion shaft of the differential gear is fitted in the fitting hole formed at the other end of the propeller shaft in the axial direction to couple the propeller shaft and the bevel pinion shaft. So
A flange member for connection and bolts and nuts for fixing, which are required in the past, are no longer required, and the number of parts can be reduced by this, and work for attaching this part is also unnecessary, and workability is greatly improved. be able to.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing one embodiment of the present invention.

FIG. 2 is a cross-sectional side view showing details of that of FIG.

FIG. 3 is a sectional side view showing, in an enlarged manner, a coupling portion between the propeller shaft and the differential gear of FIG.

FIG. 4 is an enlarged sectional side view of a fitting portion between the sliding yoke and the bevel pinion shaft of FIG.

FIG. 5 is a sectional side view showing a connecting portion of a conventional propeller shaft.

FIG. 6 is a schematic view showing a rotation center axis of the propeller shaft of FIG.

FIG. 7 is an enlarged cross-sectional view showing a connecting portion between an end portion of the propeller shaft of FIG. 5 and a flange member of a bevel pinion shaft.

[Explanation of symbols] 1 Propeller shaft 2 Transmission 6 Bearing 7 Transmission case 8 Differential gear 11 Bevel pinion shaft 19 Differential carrier 21 Bearing 23 Fitting hole 26 Circlip

Claims (2)

[Claims] 1. A propeller shaft for a vehicle, which transmits power between a transmission and a differential gear, wherein one end of the propeller shaft is supported by a transmission case and the other end is supported by a differential carrier through bearings. A propeller shaft for a vehicle, which is characterized in that 2. An outer peripheral portion of the other end portion of the propeller shaft is supported by a differential carrier via a bearing, and a bevel pinion shaft is inserted inside a fitting hole formed in the propeller shaft in an axial direction. The propeller shaft for a vehicle according to claim 1, wherein a circlip that is expanded in diameter and locked inside is attached to a tip end portion of the bevel pinion shaft.