JPH0685925U - Propeller shaft - Google Patents

Abstract

(57) [Summary] [Object] To provide a propeller shaft capable of suppressing membrane vibration and resonance vibration of the propeller shaft and facilitating insertion and fixation of ball paper. [Structure] At both ends of the paper tube 2, a flange portion 3b is formed outward at one end of a cylindrical portion 3a, and an inward flange portion 3c is formed at the other end of the cylindrical portion 3a. At the same time, a ring 3 having a hole 3d formed in the inner flange portion 3c is fitted so that the outer diameter of the paper tube 2 is larger than the outer diameter of the outer flange portion 3b of the ring 3. Characteristic propeller shaft.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a propeller shaft that transmits power (rotating torque) from a transmission such as an automobile or an agricultural machine to a differential gear device for driving wheels.

[0002]

[Prior art]

 The propeller shaft that transmits power from the transmission of the automobile to the differential gear device has universal joints 11 and 12 attached at both ends as shown in FIG. 3, and one universal joint 11 is connected to the output shaft of the transmission. The other universal joint 12 is connected to the input shaft of the differential gear device. A propeller shaft tube is used to reduce the weight of such a propeller shaft 10. However, various vibrations are transmitted from the engine and the vehicle body to the propeller shaft, such as gear vibration from the transmission and impact noise during gear shifting. Make a noise. In particular, when the natural frequency of the propeller shaft matches, resonance phenomenon occurs and noise also increases. For this reason, various measures have been attempted on propeller shafts as noise prevention measures. For example, as shown in FIG. 3, a paper tube 2 in which ball paper is laminated in a cylindrical shape is arranged in a tube of a propeller shaft 10 and is stopped by a tape 13 in practice.

In addition, as a vibration damping means for a propeller shaft, Japanese Utility Model Laid-Open No. 4-11912 discloses a propeller shaft including a tube and yokes of universal joints provided at both ends thereof. , A propeller shaft characterized by being filled with foamed resin in the south of the tube has been proposed, or in the Japanese Utility Model Publication No. 54-115029, a front universal joint and a rear universal joint are connected. A propeller shaft for automobiles has been proposed which is characterized in that a sound absorbing and damping material is filled inside the propeller shaft tube.

[0004]

[Problems to be Solved by the Invention] As described above, a paper tube 2 having a plurality of rolls of ball paper is put in the tube 1 in the propeller shaft so as to be closely adhered to the inner wall of the tube 1 and to be appropriately welded. It is fixed with tape 13 so that it does not move away from the surface. However, fixing with tape in this way is extremely inferior in workability, and is effective for film vibration on the surface, but due to resonance phenomenon. There is a problem that the effect cannot be expected as noise prevention.

The present invention has been made in view of the above problems, and an object of the present invention is to suppress membrane vibration and resonance vibration of a propeller shaft and to easily insert and fix ball paper. Providing a propeller shaft that can

[0006]

[Means for Solving the Problems]

 That is, in order to solve the above-mentioned problems, the present invention proposes a propeller shaft in which paper tubes laminated in a cylindrical shape are inserted into a propeller shaft tube, and one end of the cylindrical portion is provided at each end of the paper tube. A flange portion is formed at the end of the cylindrical portion, and a flange portion is formed at the other end of the cylindrical portion inward, and a ring is formed in the inner flange portion to form a ring. Is fitted such that the outer diameter of the ring is larger than the outer diameter of the outer flange of the ring.

[0007]

[Action]

 The operation when the propeller shaft is used as the above means will be described with reference to the accompanying drawings (FIGS. 1 and 2). After being inserted into the propeller shaft tube 1, the paper tube 2 is installed in a state in which the inner wall of the propeller shaft tube 1 is urged by elasticity and the cylindrical portion 3a of the ring 3 causes the paper tube 2 to move. Since the inner diameter of the inner part is restricted from moving inward, the adhesion becomes stronger. Therefore, the paper tube 2 can be maintained in a stable state without particularly fixing the ring 3 and the like in the propeller tube 1. Also, even if shocking vibrations or vibrations due to gear meshing are transmitted from the engine or the transmission to the propeller shaft, the vibration damping effect is strengthened by strengthening the adhesion of the paper tube 2 to the inner wall of the propeller shaft, thus suppressing the membrane vibration. And the noise is reduced. In particular, the resonance phenomenon of vibration can be suppressed by the hole 3d formed in the inner flange portion 3b at the end portion of the ring 3 fitted in the both end portions of the paper tube 2.

[0008]

【Example】

 Hereinafter, a specific embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of a ring used in the propeller shaft of the present invention. That is, in the propeller shaft of the present invention, a paper tube 2 is formed by laminating ball paper in a cylindrical shape, and the rings 3 are fitted to both ends of the paper tube 2 and fitted into the propeller shaft tube 1. It In the ring 3, a flange portion 3b is formed outward at one end of the cylindrical portion 3a, and the other end of the cylindrical portion 3a is formed so as to bulge and the end portion of the cylindrical portion 3a is formed. A flange portion 3c is formed inwardly on this. Of course, the cylindrical portion 3a may be a flat cylinder. A hole 3d is formed in the center of the inner flange 3c. The material of the front ring 3 may be steel or synthetic resin.

FIG. 2 is a vertical cross-sectional view showing a state in which the paper tube 2 having the ring 3 fitted at both ends thereof is fitted into the propeller shaft tube 1. As described above, the rings 3 are fitted into both ends of the paper tube 2, and in this case, the outer diameter of the paper tube 2 is wound and inserted so that it is slightly larger than the outer diameter of the outer flange portion 3a of the ring 3. . Further, the area in contact with the inner wall of the paper tube 2 is reduced due to the bulging of the end portion of the cylindrical portion 3a of the ring 3.

The paper tube 2 is fitted into the propeller shaft tube 1 with the rings 3 and 3 fitted therein, and the outer diameter of the paper tube 2 is elastically deformed when inserted. Due to this, the diameter is slightly reduced and it is inserted. When the paper tube 2 is inserted into the propeller shaft tube 1, a jig or the like may be used.

When the propeller shaft has the above-mentioned structure, after being inserted into the propeller shaft tube 1, the paper tube 2 is installed in a state in which the elastic biasing force acts on the inner wall of the propeller shaft tube 1 and the ring. Since the inner diameter of the paper tube 2 is restricted from moving inward by the cylindrical portion 3a of 3, the adhesive force becomes stronger. Therefore, the paper tube 2 can be maintained in a stable state without particularly fixing the ring 3 and the like in the propeller tube 1.

Further, even if shock vibration or vibration due to gear meshing is transmitted from the engine or the transmission to the propeller shaft, the vibration damping action is strengthened by strengthening the adhesion of the paper tube 2 to the inner wall of the propeller shaft. Is suppressed and noise is reduced. In particular, the resonance phenomenon of vibration can be suppressed by the hole 3d formed in the inner flange portion 3c at the end portion of the ring 3 fitted in the both end portions of the paper tube 2.

[0013]

[Effect of device]

 Since the propeller shaft of the present invention is configured as described above in detail, not only the work of inserting the paper tube into the propeller shaft becomes extremely easy, but also the vibration suppressing action is strengthened. Furthermore, noise during the resonance phenomenon can be reduced.

[Brief description of drawings]

FIG. 1 is a perspective view of a ring used in a propeller shaft of the present invention.

FIG. 2 is a vertical cross-sectional view showing a state in which a paper tube is fitted into a propeller shaft tube.

FIG. 3 is a schematic view including a partial cross section of a conventional propeller shaft.

[Explanation of symbols]

 1 Propeller shaft tube 2 Paper tube 3 Ring 3a Cylindrical part 3b, 3c Flange part 3d Hole

Claims (1)

[Scope of utility model registration request] 1. A propeller shaft in which paper tubes laminated in a cylindrical shape are fitted in a propeller shaft tube, and a flange portion is outwardly provided at both ends of the paper tube and at one end of the cylindrical portion. A ring having a flange portion formed inward at the other end of the cylindrical portion and a hole formed in the inner flange portion is formed so that the outer diameter of the paper tube is equal to that of the outer flange portion of the ring. A propeller shaft that is fitted so as to be larger than the outer diameter.