JPS61171923A - Plunging type double pod joint - Google Patents

Abstract

PURPOSE:To enable a sealing boot of being mounted tightly at one end thereof and increase the strength and the rigidity of the open part of an external shell by integrally forming at annular flange around the external circumference of the open end part of said shell. CONSTITUTION:A flange 3 which provides a means of joining with another member is formed at one end of an external member 1. An external shell 2 which provides a means for accepting an internal member is formed at the other end of said member 1. An annular flange 8 is integrally formed around the external circumference of the open end part of the external shell 2. The flange 8 has both an annular projection 9 and an annular smoothened face 10 formed successively on the external circumference thereof. Such formation is not only suitable in mounting a sealing boot but also rather effective in reinforcement of the open end of the external shell 2 which has potential problem in strength or rigidity.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a joint for transmitting rotational torque, and particularly to a blanging type two-pod joint.

<Prior Art> Universal joints have conventionally been used as power transmission means for propeller shafts and drive axles of automobiles.

The most well-known type of universal joint is the Cardan joint, but since it itself does not have constant velocity, two Cardan joints are generally combined to achieve constant velocity. In such a transmission system, if there is displacement in the axial direction, slide splines, ball splines, etc. are used, which increases the cost and tends to make the structure complicated and large. . However,
In recent years, a type of joint called a blanging type two-pod joint has been used. According to this joint, uniform velocity can be obtained by combining it with one cardan joint.
Furthermore, it is possible to omit means for absorbing displacement in the axial direction, such as a ball spline.

Blanging-type two-pod joints transmit power between an outer cylinder and an internal member that is fitted into the outer cylinder so that it can slide and bend in the axial direction and transmit rotational torque. It is necessary to seal the sliding part with grease and to prevent foreign matter from entering the sliding part. However, since both parts of the joint are axially displaced and bent relative to each other, a bellows type sealing boot is generally used. One end of the sealing boot is attached to the main shaft on the side of the internal member, and the other end is attached to the outer cylinder, but in a two-pod joint, the outer cylinder has an approximately oval shape. This makes it difficult to install the sealing boot to achieve the required airtightness.

<Problems to be Solved by the Invention> In view of the drawbacks of the prior art, the main object of the present invention is to provide a plunging type two-pod joint having a suitable sealing boot mounting structure.

<Means for Solving the Problems> According to the present invention, the present invention provides an external member having an outer cylinder opening on at least one side, and an external member fitted into the opening of the outer cylinder so as to bend and axially align with each other. A blanging-type two-pod joint comprising an internal member capable of directional movement and transmitting rotational torque, characterized in that a seven-circular flange is integrally provided on the outer periphery of the open end of the outer cylinder. This is achieved by providing a blanging-type two-pod joint.

<Function> As described above, by providing the seven circular lunges on the outer periphery of the open end of the outer cylinder, one end of the sealing boot can be tightly attached, and the strength and rigidity of the opening of the outer cylinder is increased. increase

<Example> FIGS. 1 and 2 show a blanging type 2-pound joint according to the present invention. One end of the outer member 1 is formed with a 7-lunge 3 for connection to other members, and the other end is formed with an outer member 112 for receiving the inner member. The outer cylinder 2 extends from the 7 flange 3 with a substantially circular cross section, and has an inner hole 4 defined therein that opens toward the free end.

As clearly shown in FIGS. 2 and 3, the inner hole 4 has a cylindrical center hole 6 having a chamfered opening edge 6a, and a pair of holes that are continuous and parallel to the center hole 6. It consists of two side holes 5 connected at corner positions. The central hole 6 has a side wall concentric to the 7 flange 3;
The side holes 5 also each have an arc-shaped side wall. On the other hand, the flange 3 has bolt holes 7 at appropriate locations for connection to other members.

As shown in Figures 2 and 3, the external shape of the outer cylinder 2 is approximately oval, and when a sealing boot is attached directly to the outer circumference, it is difficult to obtain the required sealing performance. is difficult. Therefore, a circular flange 8 is integrally formed on the outer periphery of the open end of the outer cylinder 2, and an annular protrusion 9 and an annular smooth surface 10 are connected to the outer periphery.

As shown in FIGS. 1 and 2, the internal member 13
is formed at the free end of the main shaft 14, and is mounted on a spline 14a cut into the free end of the main shaft 14 so as not to be relatively rotatable, and is prevented from being removed in the axial direction by a snap ring 15. It consists of a member 16 and rolling elements 18 mounted via needle bearings 17 on both ends of the spider member in a direction perpendicular to the axial direction of the main shaft 14.

In particular, as clearly shown in FIG. 2, the intermediate portion 16a of the spider member 16 has a spherical shape, and is slidable in the central hole 6 of the inner hole 4 in the axial direction, but perpendicular to the axial direction. The rolling elements 18 are received in such a way that they are not displaced within the plane of the side hole 5, and the rolling elements 18 are fitted into the side walls of the side holes 5 without causing any deformation, so that rotational torque can be transmitted. Therefore, is the main shaft 14 axially oriented with respect to the external member 1? l
ll! ! Moreover, since the spider member 16 is fitted into the center hole 6 with a spherical surface and the rolling elements 18 are also spherical, the main shaft 14 can also tilt relative to the external member 1.

In this way, the main shaft 14 and the external member 1 constitute a blanging type two-pod joint which is capable of transmitting torque to each other, is slidable in the axial direction, and is also capable of tilting relative to each other.

Further, a large diameter end of a bellows-type sealing boot 19 is attached to a boot band 2 on an annular smooth surface 10 provided on the outer periphery of the flange 8.
1, and the small diameter end of the sealing boot 19 is similarly attached to the main shaft 14 by a boot band 20. 7. The annular protrusion 9 provided on the free end side of the outer periphery of the flange 8 ensures the sealing effect and also seals the sealing boot 19.
It works to prevent the material from falling off.

The inside of the outer cylinder 2 is filled with grease for lubricating the sliding parts, and the large diameter end of the sealing boot 19 is suitably attached to the boot band 21 on the outer periphery of the seven flange 8 of the outer cylinder 2. Therefore, grease does not leak to the outside, and foreign matter does not enter the inside of the outer cylinder 2 from the outside.

In particular, according to the main body side, since the 7 langes 8 are integrally formed at the open end of the outer cylinder 2, it is not only suitable for attaching a sealing boot, but also suitable for external use where strength or rigidity may be a problem. The open end of EI2 is considerably reinforced.

Although preferred embodiments of the present invention have been described above, the present invention is not limited to the above. For example, instead of forming the 7 flange 8 integrally with the outer cylinder 2, the 7 flange 8 like TI4 may be fitted, welded or other means. It is also possible to attach it integrally.

<Effects> As described above, according to the present invention, even if the outline of the outer periphery of the outer cylinder is not circular, the sealing boot can be suitably mounted by simply providing the circular 7 flange at the open end of the outer cylinder. Moreover, it is possible to achieve the effect of improving the strength and rigidity.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view of a branding type two-pod joint according to the present invention. FIG. 2 is a sectional view taken along line I-II in FIG. 1. FIG. 3 is a perspective view of the outer cylinder shown in FIGS. 1 and 2. FIG. 1... External member 2... Outer cylinder 3... 7 lange part 4... Inner hole 5... Side hole 6.
...Center hole 6a...Opening edge 7...Bolt hole Dice 8...7 Lunge 9.
...Annular protrusion 10...Annular smooth surface 13...Internal member 14...Main shaft 14a...Spline 15...Snap ring 16...Spider member 16
a... Middle part 17... Needle bearing 1
8... Rolling element 19... Seal boot 20
．． 21... Boot band patent applicant: Honda Motor Co., Ltd.
Attorney Patent Attorney Yo Oshima
-Figure 2Figure 3

Claims (1)

[Scope of Claims] A brand comprising: an outer member having an outer cylinder that is open on at least one side; and an inner member that is fitted into the opening of the outer cylinder so as to be able to bend and move in the axial direction to each other and transmit rotational torque. A blanging type two-pod joint, characterized in that a circular flange is integrally provided on the outer periphery of the open end of the outer cylinder.