JPH066284Y2 - Sliding universal joint - Google Patents

Description

Detailed Description of the Invention A. Purpose of the Invention (1) Field of Industrial Use The present invention relates to a slide type universal joint provided in a bend portion of a bendable wheel drive shaft of, for example, an automobile, and in particular, a plurality of articles extending in an axial direction at intervals. A cylindrical outer member having a transmission groove on its inner peripheral surface and connected to one transmission shaft; an inner member having a plurality of trunnions extending radially so as to project into a plurality of transmission grooves and connected to the other transmission shaft A member; an inner roller slidably fitted to the outer circumference of each trunnion; a holder relatively swingably fitted to the outer circumference of the inner roller; a rotatably fitted to the outer circumference of the holder And an outer roller which is engaged with the transmission groove.

(2) Conventional technology This type of universal joint is available in Japanese Patent Publication Sho 57-13.
It is already known as disclosed in Japanese Patent Publication No. 211.

(3) Problems to be solved by the invention In such a conventional joint, when both transmission shafts bend each other during transmission, the outer roller reciprocally rolls in the transmission groove while allowing the tilting of the trunnion, but the trunnion The outer roller also tilts to some extent in accordance with the tilting, and as a result, the rolling resistance of the outer roller increases, and vibration may occur.

The present invention has been made in view of the above circumstances, and the outer roller can be reciprocally rolled in a transmission groove while maintaining an appropriate posture without tilting due to tilting of the trunnion, and the slide is easy to manufacture. The purpose is to provide a universal universal joint.

B. Configuration of the Invention (1) Means for Solving the Problems In order to achieve the above-mentioned object, according to the present invention, at least one side edge is formed in the longitudinal direction of the transmission groove at the end portion of the transmission groove open surface of the holder. The outer member is provided with a rail portion that extends linearly and is formed separately from the holder, and a rail portion that abuts the one side edge portion of the regulation plate to suppress the inclination of the holder. Characterize.

(2) Operation According to the above configuration, even if the holder of the outer roller tries to tilt when the trunnion tilts, the side edge portion of the regulation plate fixed to the holder has a long span in the longitudinal direction of the transmission groove on the rail portion of the outer member. Since the holder is reliably supported and supported stably, the inclination of the holder is surely suppressed, so that the outer roller supported by the holder can smoothly roll back and forth in the transmission groove without being inclined.

Further, since the restriction plate which is separate from the holder can be processed independently, it can be easily obtained in a shape such as a square suitable for suppressing the inclination of the holder.

(3) Embodiment An embodiment of the present invention will be described below with reference to the drawings.

First, referring to FIGS. 1 and 2, two transmission shafts 1 and 2 are cylindrical outer joints in which the slide type universal joint J of the present invention is integrally connected to the end of the transmission shaft 1 and the front end surface is open. The main elements are the member 3 and the inner member 4 fixed to the end of the other transmission shaft 2 and housed in the outer member 3. On the inner peripheral surface of the outer member 3, three transmission grooves 5 extending in the axial direction at equal intervals from each other, and a pair of rail portions 6 extending from both edges of each transmission groove 5 to its open surface. , 6 are formed.

On the other hand, on the outer peripheral surface of the boss 7 of the inner member 4 fixed to the transmission shaft 2, the protrusions 3 are inserted into the three transmission grooves 5 ...
Book trunnions 8 are integrally projected.

A spherical inner roller 9 having a center on its axis is slidably fitted to the outer circumference of each trunnion 8, and a holder 10 is relatively swingably fitted to the outer circumference of the inner roller 9. . Further, a cylindrical outer roller 12 is rotatably fitted to the outer periphery of the holder 10 via a needle bearing 11, and the outer roller 12 is rotatably engaged with the transmission groove 5.

An outer end of the holder 10 slidably contacts the bottom surface of the transmission groove 5, and a regulation plate 13 slidably contacts the inner side surface of the rail portion 6 at the inner end of the holder 10.

As shown in FIG. 3, the restriction plate 13 is manufactured separately from the holder 10, and the short shaft 10a protruding from the inner end of the holder 10 is press-fitted into the circular mounting hole 16 opening at the center thereof. As a result, it is fixed to the holder 10.

In addition, welding or screwing may be used for the fixing.

Further, as shown in FIG. 4, in the regulation plate 13, at least one side extending in the lateral width direction of the transmission groove 5 is the outer roller 12.
It has a rectangular shape slightly smaller than the outer diameter of the outer roller 12 so that it can reciprocate without hindering the rolling of the outer roller 12 and without rotating in the transmission groove 5. Both side edge portions 13a of the regulation plate 13 along the longitudinal direction of the transmission groove are linearly long in the same longitudinal direction. Therefore, even if the holder 10 tries to tilt when the trunnion 8 tilts, the both side edge portions 13a.
Since a can be stably abutted and supported on the rail portion 6 with a long span in the longitudinal direction of the transmission groove, the inclination of the holder 10 can be reliably suppressed.

Further, the holder 10 is integrally formed with a flange 14 that cooperates with the restriction plate 13 to suppress axial movement of the outer roller 12.

In FIG. 1 again, a flexible boot 18 is stretched between the outer member 3 and the transmission shaft 2 to cover the open / close end of the outer member 3. One end of the flexible boot 18 is fitted in the outer peripheral groove 19 of the outer member 3 and tightened by the band 20, and the other end is fitted in the outer peripheral groove 21 of the transmission shaft 2 and tightened by the band 22.

Next, the operation of this embodiment will be described. For example, when a rotational torque is applied to the transmission shaft 1, the torque is transmitted to the outer member 3
To the inner member 4, that is, from one side surface of the transmission groove 5 to the trunnion 8 and the boss 7 through the outer roller 12, the holder 10 and the inner roller 9, and then to the transmission shaft 2.

In the meantime, if the two transmission shafts 1 and 2 are bent so that their axes cross each other, the inner roller 9 will move to the trunnion 8.
The outer roller 12 reciprocally rolls on one side surface of the transmission groove 5 while sliding on the trunnion 8 while allowing the tilting. that time,
In particular, the holder 10 includes the rail portion 6 and the regulation plate 13 as described above.
Since the inclination in the transmission groove 5 is suppressed by contact with both side edge portions 13a of the outer roller 1 of the outer roller 1 supported by the holder 5,
2 does not incline, and therefore can smoothly roll in the transmission groove 5.

Further, even when both the transmission shafts 1 and 2 are axially displaced from each other, the outer roller 12 can smoothly roll in the transmission groove 5 without tilting.

By the way, although the regulation plate 13 has a rectangular shape that is most suitable for suppressing the inclination of the holder 10, since it is a separate body from the holder 10, it is processed in advance before being fixed to the holder 10.
This can be easily manufactured with high yield.

C. As described above, according to the present invention, at least one side edge portion of the end of the holder on the open side of the transmission groove extends linearly in the longitudinal direction of the transmission groove and is formed separately from the holder. Since the outer member is provided with a rail portion for fixing the regulation plate to be fixed and abutting the one side edge portion of the regulation plate to suppress the inclination of the holder, even if the holder of the outer roller tries to tilt when the trunnion tilts. The side edge portion of the regulation plate fixed to the holder can be stably abutted and supported on the rail portion with a long span in the longitudinal direction of the transmission groove, and the inclination of the holder and the outer roller can be reliably prevented. Since the roller can always be kept in an appropriate rolling posture, the rolling resistance of the outer roller is reduced,
This reduces power loss and suppresses vibration. In addition, since the long span is secured as described above, the load burden on the sliding contact portion between the regulation plate side edge portion and the rail portion is reduced, so that it is possible to suppress early wear of the sliding contact portion, and The effect of preventing the inclination of the outer roller by the cooperation of the regulation plate and the rail portion as described above can be effectively exhibited for a long period of time.

Moreover, since the regulation plate can be manufactured separately from the holder, it can be easily manufactured into a rectangular shape suitable for suppressing the inclination of the holder.

[Brief description of drawings]

The drawings show one embodiment of the slide type universal joint of the present invention. Fig. 1 is a longitudinal sectional view, Fig. 2 is a sectional view taken along the line II-II of Fig. 1, and Fig. 3 is a main part of Fig. 2. Enlarged view, No. 4
The drawing is a sectional view taken along the line IV-IV in FIG. J ... Joint, 1 ... One transmission shaft, 2 ... Other transmission shaft, 3 ... Outer member, 4 ... Inner member, 5 ... Transmission groove, 6 ... Rail part, 8 ...
Trunnion, 9 ... Inner roller, 10 ... Holder, 12 ... Outer roller, 13 ... Regulation plate, 13a ... Side edge

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shigeo Kurita, 1-4-1, Chuo, Wako-shi, Saitama, Honda R & D Co., Ltd. (56) References JP-A-63-195421 (JP, A) Sho 59-29151 (JP, Y2)

Claims (2)

[Scope of utility model registration request] 1. A cylindrical outer member (3) having a plurality of transmission grooves (5) extending in the axial direction at intervals from each other on the inner peripheral surface thereof and connected to one transmission shaft (1); An inner member (4) having a plurality of trunnions (8) extending radially so as to project into a plurality of transmission grooves (5) and connected to the other transmission shaft (2); on the outer periphery of each trunnion (8) An inner roller (9) slidably fitted; a holder (10) fitted to the outer periphery of the inner roller (9) so as to be relatively swingable
An outer roller (12) rotatably fitted to the outer periphery of the holder (10) and engaged with the transmission groove (5)
In the slide type universal joint consisting of and, at least one side edge portion (13a) extends linearly in the longitudinal direction of the transmission groove (5) at the end portion of the transmission groove open surface side of the holder (10) and A regulation plate (13) formed separately from the holder (10) is fixed and abutted on the one side edge portion (13a) of the regulation plate (13) to suppress the inclination of the holder (10). A slide-type universal joint characterized in that the rail portion (6) is provided on the outer member (3). 2. The utility model registration claim (1), wherein the restriction plate (13) is formed in a rectangular shape so as to reciprocate in the transmission groove (5) of the outer member (3) without rotating. ) The slide type universal joint described in the item.