JP2596239Y2 - Propeller shaft for vehicles - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a propeller shaft for a vehicle, and more particularly, to a propeller shaft for transmitting driving force from an engine transmission to a final reduction gear. And a propeller shaft for a vehicle.

[0002]

2. Description of the Related Art As a conventional propeller shaft for a vehicle of this type, for example, one having a configuration as shown in FIG. 2 disclosed in Japanese Patent Laid-Open No. 57-15126 is known. Here, 10 is the engine, 20 is its transmission, 30
Is a propeller shaft for transmitting the output from the transmission 20 to the final reduction gear 40. The propeller shaft 30 according to the present embodiment is divided into two shafts, a first shaft 31 and a second shaft 32, and the first shaft 31 and the output shaft 21 of the transmission 20 are divided.
Are connected by a rubber coupling 33, and hooks joints (Cardan joints) 34 and 35 are respectively connected to the first shaft 31, the second shaft 32, the second shaft 32, and the input shaft 41 on the final reduction gear 40 side. Used. Reference numeral 36 denotes a center bearing that supports the first shaft 31, and B denotes an elastic support portion for supporting the first shaft 31 on the vehicle body side.

[0003]

However, in the above-described conventional vehicle propeller shaft, the propeller shaft 30 is mounted on the vehicle body in a state where the deflection angle exists between the output shaft 21 of the transmission 20 and the first shaft 31. When the running is performed, the rubber coupling 33 connecting the output shaft 21 and the first shaft 31 is rotated while being twisted due to the runout, and the runout angle and the rubber coupling 33 have A bending moment M corresponding to the bending rigidity is generated. On the other hand, since the transmission 20 is elastically supported by the vehicle body via the support portion B as shown in the figure together with the engine 10, the reaction force due to the bending moment M is applied to the elastic support portion B via the shaft lead-out portion. FC ′ is actuated and the shaft 30
The transmission 20 is vibrated in synchronization with the rotation speed of the vehicle, and this causes vibration of the vehicle body during traveling of the vehicle.

An object of the present invention is to pay attention to the above-mentioned problem, and to solve the problem, minimize vibration transmitted to a vehicle body due to a deflection angle generated between an input side and an output side of a propeller shaft. It is an object of the present invention to provide a vehicle propeller shaft in which a rubber coupling is arranged so as to be able to suppress it.

[0005]

In order to achieve the above object, the present invention comprises connecting a plurality of shafts to each other with a joint, and connecting an output shaft of an engine-side transmission and an input shaft of a final reduction gear. A second shaft of the plurality of shafts from the engine-side transmission, and a first second shaft of the plurality of shafts from the engine-side transmission.
A joint connecting the shaft and a third third shaft is a rubber coupling, and one of the pair of shafts connected to each other by the rubber coupling is located near the rubber coupling and supported by a vehicle body. The center bearing support is provided.

[0006]

According to the present invention, the location of the rubber coupling and the center bearing is specified so that the vibration caused by the bending rigidity of the rubber coupling can be more efficiently utilized while utilizing the vibration damping effect of the rubber coupling. The propeller shaft itself is prevented from being affected by heat, and the torsional vibration of the propeller shaft itself is stably suppressed.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings.

FIG. 1 shows an embodiment of the present invention. In this example, the first shaft 31 and the second shaft 32 of the propeller shaft 30 are connected by a rubber coupling 43, and the first shaft 31 and the transmission 2 are connected.
The 0 output shaft 21 and the second shaft 32 and the input shaft 41 of the final reduction gear 40 are connected by cardan joints 44 and 45. The support portion B of the center bearing support 36 that supports the propeller shaft 30 on the vehicle body side is provided near the rubber coupling 43 of the first shaft 31, and FIG.
Does not change relative to the position of the center bearing support 36 shown in FIG.

In the propeller shaft 30 thus connected and supported according to the present embodiment, as can be seen by comparing FIG. 1 with FIG. 2, from the drawing portion of the output shaft 21 of the transmission 20 to the rubber coupling. 2 is L2 in FIG. 2, while L1 is kept sufficiently long in FIG. On the other hand, the rubber coupling 33 or 43
In FIG. 1, since the magnitude of the bending moment M generated based on the bending rigidity and the deflection angle is the same, the reaction force acting as the excitation force of the transmission 20 is Fc = M / L1 in FIG. Thus, in the case of FIG. 2, Fc '= M / L2, and it can be seen that Fc is sufficiently smaller than Fc'. Thus, according to the present embodiment, in the propeller shaft having the rubber coupling, the vibrating force for vibrating the vehicle body can be suppressed lower than in the related art.

In the above-described embodiment, the case of a two-part type propeller shaft has been described. However, even in the case of a three-part type propeller shaft, a connecting portion between the first shaft and the second shaft is provided. Alternatively, by using a rubber coupling for the connecting portion between the second shaft and the third shaft, an effect of suppressing generation of a force for exciting the vehicle body can be obtained. Further, in the above description, the example in which the center bearing support is provided on the first shaft side has been described. However, the case where the center bearing support is provided on the second shaft 32 side immediately after the second joint by the rubber coupling is described. Needless to say, the same effect can be obtained.

[0011]

[Effects of the Invention] As described above, according to the present invention,
A coupling that connects a second second shaft from the engine-side transmission among the plurality of shafts and a first shaft or a third third shaft on the first surface from the engine-side transmission is referred to as a rubber coupling. Thus, vibration transmitted from the transmission to the vehicle body due to the bending rigidity of the rubber coupling can be suppressed while utilizing the vibration damping effect of the rubber coupling. Furthermore, since one of the pair of shafts connected by the rubber coupling is provided with a center bearing located near the rubber coupling and supported by the vehicle body, the center bearing causes vibration caused by the bending rigidity of the rubber coupling. In addition, since the rubber coupling and the center bearing are arranged at a distance from a heat source such as an engine, the influence of the rubber constituting them can be avoided, and the propeller can be prevented. The torsional vibration and the like of the shaft itself can be suppressed stably.

[Brief description of the drawings]

FIG. 1 is a configuration diagram illustrating an example of a shaft connection state according to the present invention;

FIG. 2 is a configuration diagram of a two-part type propeller shaft according to a conventional example.

[Explanation of symbols]

 Reference Signs List 10 engine 20 transmission 21 output shaft 30 propeller shaft 31 first shaft 32 second shaft 40 final reducer 41 input shaft 43 rubber coupling 44, 45 cardan joint

Claims (1)

(57) [Scope of request for utility model registration] 1. A vehicle propeller shaft connected between an output shaft of an engine-side transmission and an input shaft of a final reduction gear, wherein the plurality of shafts are connected to each other by a joint. A joint coupling between a second second shaft from the engine-side transmission and a first first shaft or a third third shaft from the engine-side transmission is a rubber coupling ; The rubber coupling is connected to each other.
Located on one of the paired shafts near the rubber coupling
A propeller shaft for a vehicle, comprising a center bearing support supported by the vehicle body .