JPH06227274A - Propeller shaft - Google Patents

Abstract

PURPOSE:To decrease surface deflection of a connection flange relative to the shaft body and decrease vibration of a propeller shaft by forming a surface deflection correcting means from detention holes between flange side bolt mounting parts in the connection flange and a protruding member which protrudes from the detention hole to the yoke plane part of a joint yoke. CONSTITUTION:A surface deflection correcting means 38 is formed from detention holes 34-1 thru 34-4 formed between flange bolt mounting holes 30-1 thru 30-4 provided in a connection flange 10 and a protruding member 36 which is in engagement so that it protrudes from the detention holes 34-1 thru 34-4 to the yoke plane 24 of a joint yoke 14. In this surface deflection correcting means 38, the protruding member 36 in screw engagement with the detention hole formed on the L1 side having smaller thickness is protruded to the yoke plane 24 side in an amount corresponding to the difference in the thickness so that the surface deflection of the connection flange 10 relative to the shaft body 4 is decreased when the flange plane 28 on the connection flange 10 has had different thickness between the width L1 on one side and the width L2 on the other side owing to tolerance or deflection generated under machining.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a propeller shaft, and more particularly to a joint yoke of a universal joint having one end portion connected to a driving force generating means and the other end portion provided with a connection flange attached to a power transmission device. The present invention relates to a propeller shaft in which connecting bolts are joined to a plurality of flange side bolt mounting portions of the connecting flange and a plurality of yoke side bolt mounting portions of the joint yoke, and the other end portion is connected to the power transmission. .

[0002]

2. Description of the Related Art In a vehicle, as shown in FIG. 5, a power transmission (not shown), which is one power transmission unit for transmitting power of an internal combustion engine.
Is provided to the differential gear 106, which is another power transmission device, via the propeller shaft 102, and the power transmission system for rotating the rear wheels attached to the wheel shaft is provided.

The propeller shaft 102 has a universal joint 10
8 and the connection flange 110, and is connected to the differential gear 106. The universal joint 108 is the shaft body 104.
A shaft yoke 112 and a joint yoke 114, which are fixed to the end portion of, are connected by a spider 116. The connection flange 110 is fixed to the differential case 118 of the differential 106.

The joint yoke 114 and the connecting flange 110 are joined together while a joint spigot portion and a flange spigot portion (not shown) are fitted.

In such a power transmission system of the propeller shaft 102, in order to reduce body vibration and muffled noise caused by the imbalance of the propeller shaft 102, the maximum direction of the unbalance amount on the propeller shaft 102 side and the connecting direction are used. A method is known in which an imbalance of the propeller shaft 102 is canceled by assembling as close as possible to the minimum direction of misalignment of the spigot portion on the flange 110 side.

A propeller shaft is disclosed, for example, in Japanese Utility Model Publication No. 2-2085. In the one disclosed in this publication, a flange member is spline-coupled to the rear end of the first shaft, the first shaft is rotatably supported by the vehicle body between the flange member and the second joint, and a flange is attached to the front end of the third shaft. The members are spline-joined, the third shaft is rotatably supported by the vehicle body between the flange member and the third joint, and further flange portions are formed at the front and rear ends of the second shaft, and the flange portions are used as the flange member. The bolts are connected to each other to facilitate the replacement of the second shaft and to easily perform the error correction after the assembling on the second shaft portion, thereby simplifying the maintenance work and the assembling work.

[0007]

However, for example, in the propeller shaft to which the universal joint is attached as described above, when the yoke flat surface portion 124 of the joint yoke 114 and the flange flat surface portion 128 of the connecting flange 110 are coupled to each other, as shown in FIG. As shown in FIG. 7, when there is no surface wobbling, the propeller shaft 102 does not vibrate.

However, when the yoke flat surface portion 124 of the joint yoke 114 and the flange flat surface portion 128 of the connecting flange 110 are coupled with each other, as shown in FIG. 6, when there is surface wobbling, the propeller shaft 102 largely wobbles. There was a disadvantage that it was turned around and vibration was generated, which was disadvantageous in practical use.

A surface runout between the yoke flat surface portion 124 of the joint yoke 114 and the flange flat surface portion 128 of the connecting flange 110 is caused by a tolerance or a runout during machining. Therefore, the surface runout causes the propeller shaft 10 to move.
The shake of 2 could not be completely eliminated.

[0010]

Therefore, in order to eliminate the above-mentioned inconvenience, the present invention uses a joint transmission yoke in a universal joint having one end portion connected to a driving force generating means and the other end portion. The connection flanges attached to the joint flanges are joined together, connection bolts are attached to the flange side bolt attachment portions of the connection flange and the yoke side bolt attachment portions of the joint yoke, and the other end portion is attached to the power transmission device. In the propeller shaft connected to, the engaging hole portion formed between the flange side bolt mounting portions provided on the connecting flange, and a small amount of protrusion from the engaging hole portion to the yoke plane portion of the joint yoke. A surface wobbling correction means for reducing the surface wobbling between the connecting flange and the shaft body by the engaging protruding member is provided. .

[0011]

According to the invention as described above, when the driving force generating means and the power transmission are connected by the propeller shaft, the joint yoke of the universal joint attached to the other end of the propeller shaft is attached to the power transmission. The connecting flanges are joined together, and the projecting member is engaged with the yoke plane portion of the joint yoke so as to slightly project from the engaging holes formed between the flange-side bolt mounting portions provided on the connecting flanges, and thereafter. Attaching connection bolts to a plurality of flange side bolt mounting portions of the connecting flange and a plurality of yoke side bolt mounting portions of the joint yoke,
The surface deflection between the connection flange and the shaft body is reduced by the correction means including the engagement hole and the protruding member.

[0012]

Embodiments of the present invention will be described in detail below with reference to the drawings.

1 to 4 show an embodiment of the present invention. In FIG. 4, 2 is a propeller shaft, 4 is a shaft main body, and 6 is a power transmission device, for example, a rear differential gear. The propeller shaft 2 is for transmitting power from an internal combustion engine (not shown), which is a driving force generating means, to the differential gear 6 which is another power transmitter, and is connected by a universal joint 8 and a connecting flange 10. It is linked to motive 6.

The universal joint 8 is constructed by connecting a shift yoke 12 fixed to the other end of the shaft body 4 and a joint yoke 14 with a spider 16.

The connecting flange 10 is fixed to the differential case 18 of the differential 6.

The joint yoke 14 and the connecting flange 1
As shown in FIG. 1, the joint spigot portion 20 and the flange spigot portion 22 are fitted and joined together as shown in FIG.

As shown in FIG. 4, first to fourth joint bolt mounting holes 26-1 to 26-4, which are, for example, four joint bolt mounting portions, are equally arranged on the yoke flat surface portion 24 of the joint yoke 14. Are formed.

Further, on the flange flat surface portion 28 of the connecting flange 10, the first to fourth portions are arranged at equal intervals in the circumferential direction.
First to fourth flange bolt mounting holes 30-1 to 30-4, which are four flange side bolt mounting portions, are formed at positions corresponding to the joint bolt holes 26-1 to 26-4, for example.

The first to fourth joint bolt mounting holes 2
First to fourth connecting bolts 32-1 to 6-1 to 26-4
32-4 is inserted, and the first to fourth connecting bolts 32
-1 to 32-4 are attached to the first to fourth flange bolt attachment holes 30-1 to 30-4, respectively.

The first provided on the connecting flange 10
~ First to fourth engagement hole portions 34-1 to 34-4 formed between the fourth flange bolt mounting holes 30-1 to 30-4, respectively,
The connecting flange 10 and the shaft body are formed by the projecting member 36 that engages with the first to fourth engaging hole portions 34-1 to 34-4 so as to slightly project into the yoke flat surface portion 24 of the joint yoke 14. 4 is provided with a surface wobbling correction means 38 for reducing the surface wobbling.

More specifically, the first and second flange bolt mounting holes 30-1 and 30-2 are provided with a first engaging hole portion 34-1 at a substantially central portion thereof, and second and third flange bolts are provided. The second engaging hole portion 34 is provided at a substantially central portion between the mounting holes 30-2 and 30-3.
-2 is provided, and the third and fourth flange bolt mounting holes 30-
A third engaging hole portion 34-3 is provided at a substantially central portion between the third and 30-4, and fourth and first flange bolt mounting holes 30-4 and 30 are provided.
The fourth engagement hole portion 34-1 is provided at a substantially central portion between -1.
The inner peripheral portions of the first to fourth engagement hole portions 26-1 to 26-4 are threaded.

The outer peripheral portion of the projecting member 36 is threaded so as to be screwed into the first to fourth engaging hole portions 26-1 to 26-4, respectively. The surface wobbling correction means 3 is formed by the projecting member 36 and the first to fourth engagement hole portions 26-1 to 26-4.
8 is formed.

As shown in FIG. 3, the surface wobbling correcting means 38 has a width L1 on one side and a width L2 on the other side which are different from each other due to a tolerance or a wobbling which occurs in the flange flat surface portion 28 of the connecting flange 10 during machining. When the thickness of the protruding member 36 is screwed to the engaging hole portion formed on the side of the width L1 having a small thickness, for example, the first engaging hole portion 34-1, the width L1 and the width L2 are provided.
The surface run-out between the connecting flange 10 and the shaft body 4 is reduced by projecting the same toward the flat surface 24 of the yoke by the difference in the thickness of

Next, the operation of this embodiment will be described.

Internal combustion engine (not shown) as driving force generating means
When connecting the power transmission and the differential gear 6 with the propeller shaft 2, the joint yoke 14 of the universal joint 8 attached to the other end portion of the propeller shaft 2 is provided with the connecting flange 10 attached to the differential gear 6. It is joined.

Further, for example, in the case where the flange flat surface portion 28 of the connecting flange 10 has a thickness L1 on one side and a width L2 on the other side which are different from each other due to tolerances and runouts generated during machining, An engaging hole formed on the smaller width L1 side, for example, only the protruding member 36 screwed into the first engaging hole 34-1 is provided with the yoke flat surface portion by the difference in thickness between the width L1 and the width L2. The surface run-out between the connecting flange 10 and the shaft body 4 is reduced by projecting it to the side of 24.

After that, the first to
Connection bolts 32 are attached to the fourth flange bolt attachment holes 30-1 to 30-4 and the first to fourth joint bolt attachment holes 26-1 to 26-4 of the joint yoke 14, respectively.

As a result, the surface runout between the connecting flange 10 and the shaft body 4 which could not be corrected by the conventional one can be reduced, and the surface runout correcting means 38 can be reduced. Vibration of the propeller shaft 2 due to surface wobbling can be reduced, which is practically advantageous.

The first to fourth engaging hole portions 34-1 to 34 are also provided.
-4, the first to fourth engagement hole portions 34-1 are formed.
To 34-4 and the thread pitches of the first to fourth flange bolt mounting holes 30-1 to 30-4 have the same pitch, the first to fourth engagement hole portions 34-1 to 34-1. 34-4 can be made to function as a flange bolt mounting hole, the range of selection at the time of screwing the connecting bolt 32 for inlay fitting can be widened, and the balance state of the propeller shaft 2 can be improved, It is practically advantageous.

[0030]

As described in detail above, according to the present invention, the connecting yoke, which is attached to the power transmission device, is attached to the joint yoke of the universal joint which is connected to the driving force generating means at one end portion and is attached to the other end portion. In a propeller shaft that has been joined, connecting bolts have been attached to the flange-side bolt mounting portions of the connecting flange and the yoke-side bolt mounting portions of the joint yoke, and the other end portion has been connected to the power transmission. The connection flange and the shaft body are formed by the engagement holes formed between the flange-side bolt attachment portions provided on the flange, and the projecting members that engage with the yoke flat surface portion of the joint yoke from the engagement holes to slightly allow the connection. Since a surface wobbling correction means for reducing the surface wobbling of the connection flange and the shaft main body was not able to be corrected by the conventional one, Shake can be reduced to, and give reduced vibrations of the propeller shaft due to the surface deflection of the connecting flange and the shaft body, it is practically advantageous.

[Brief description of drawings]

FIG. 1 is an enlarged view of a main part of a propeller shaft showing an embodiment of the present invention.

FIG. 2 is a schematic sectional view of a connecting flange.

FIG. 3 is a sectional view of a connecting flange.

FIG. 4 is an assembled perspective view of a power transmission system.

FIG. 5 is a schematic diagram of a power transmission system showing a conventional technique of the present invention.

FIG. 6 is a schematic perspective view of a power transmission system.

[Explanation of symbols]

 2 Propeller shaft 4 Shaft body 6 Power transmission device 8 Universal joint 10 Connection flange 12 Shift yoke 14 Joint yoke 18 Differential gear case 24 Yoke flat part 26 Joint bolt mounting hole 28 Flange flat part 30 Flange bolt mounting hole 32 Connection bolt 34 Engagement hole portion 36 Projecting member 38 Surface deflection correcting means

[Procedure amendment]

[Submission date] April 20, 1993

[Procedure Amendment 1]

[Document name to be corrected] Drawing

[Correction target item name] All drawings

[Correction method] Change

[Correction content]

[Figure 1]

[Fig. 2]

[Figure 3]

[Figure 4]

[Figure 5]

[Figure 6]

Claims (1)

[Claims] 1. A connecting flange attached to a power transmission machine is joined to a joint yoke of a universal joint attached to the other end portion while connecting one end portion to a driving force generating means,
In the propeller shaft in which connecting bolts are attached to a plurality of flange side bolt mounting portions of the connecting flange and a plurality of yoke side bolt mounting portions of the joint yoke, and the other end portion is connected to the power transmission, The connecting holes are formed between the flange-side bolt mounting portions provided on the flange for use, and the projecting member is engaged with the yoke flat surface portion of the joint yoke from the engaging hole portions so as to slightly project the connection. A propeller shaft comprising a surface wobbling correction means for reducing surface wobbling between a flange and the shaft body.