JPH0610954A - Synchronous fixed joint - Google Patents

Abstract

(57) [Summary] [Objective] To avoid any costly machining of the inner surface of the outer part of the joint, to provide a synchronous fixed joint in which the friction and thus the heating on the inner surface is significantly reduced, and also to oversize the joint. Avoid setting it. The inner joint part is supported inside the outer joint part, the cage 3 is controlled only via a ball 6, and the axial support of the inner joint part is the same as that of the outer joint part 1. The ring part arranged on the open side of the hollow chamber 17 is restricted against outward movement, and the cage is spaced apart from the inner surface of the outer joint and the outer surface of the inner joint part 2. ing.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is adapted to an outer joint part having a bell shape and having a hollow chamber and having outer running grooves uniformly distributed on the peripheral surface, and the outer running groove. It has a joint inner part having an inner running groove, and a sphere which is received in the inner running groove and the outer running groove and transmits torque, and the sphere is arranged between the outer joint part and the inner joint part. Is held in the opening of the retained cage, the fitting inner part being brought into contact with the fitting surface belonging to the fitting inner part in a hollow chamber of the fitting outer part, the fitting surface matching the fitting surface. The present invention relates to a synchronous fixed joint which is axially supported inward.

[0002]

Couplings of the type in which the inner part of the joint is axially supported inwardly in the hollow space of the outer part of the joint are known (German Patent Publication DE 3114290). In the proposed solution, a space is provided between the outer surface of the inner joint part and the inner surface of the cage, whereby the mechanical surface between the inner surface of the retainer and the outer surface of the inner joint part is provided. Trying to avoid processing.

The above solution has the disadvantage that the inner surface of the outer joint part still has to be subjected to expensive machining and the joint must be oversized.

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to avoid any costly machining of the inner surface of the outer joint of a joint and to reduce friction and thus heating on this inner surface significantly. The purpose is to provide a joint and to avoid overdimensioning the joint.

[0005]

SUMMARY OF THE INVENTION The means of the present invention, which was devised to solve the above-mentioned problems, is based on the fact that the cage is controlled only by means of a sphere and is restricted in the axial direction to open the hollow chamber. It is supported axially outwardly on the ring part located on the side, and the cage is arranged at a distance from the inner surface of the outer joint part and the outer surface of the inner joint part.

[0006]

An advantage of the above arrangement is that only the outer surface of the cage needs to be mechanically machined. Furthermore, it is possible to eliminate all overdimensions which lead to high friction losses and heat generation of the joints which occur in supporting all surfaces. The risk of tightening that occurs when bending the joint is reliably eliminated in the arrangement described above.

In an advantageous construction of the invention, the ring part is
They are formed by keys welded to the outer portion of the joint between the outer running grooves under the inward pressure when the joint is assembled.

By the keys being welded under inward pressure during assembly, the joint is simultaneously adjusted with limited play.

According to another advantageous embodiment of the invention, the ring part is formed by guide surfaces which are arranged radially inward between the outer running grooves. Furthermore, according to another advantageous feature of the invention, the spherically shaped second abutment surface is defined by a radius, the center of the corresponding abutment surface being spaced from the centerline. And the radius is longer than the radius of the first abutment surface axially inward of the joint inner portion.

In another configuration of the invention, the second abutment surface is formed by a cone.

According to another aspect of the present invention, the first spherical contact surface is integrally formed with the inner joint portion, and the inner contact portion and the second contact surface are disposed between the inner joint portion and the second contact surface. A supported insert is provided. Such a construction results in a particularly compact construction of the joint according to the invention.

According to another advantageous characteristic of the invention, the spherically shaped first abutment surface is arranged as a separate partial spherical head on the side of the inner joint part facing the inside of the hollow chamber. And there is a gap between the inner part of the joint and the second abutment surface. In such an arrangement, a wide play space is allowed due to the construction of the inner joint part.

According to a further advantageous development of the invention, a partially spherical head is centered with respect to the inner joint part via a centering member. In such an arrangement, the partially spherical head is perfectly protected against eccentric movement.

According to a further advantageous feature of the invention, a second
The abutment surface is formed by an insert which is arranged axially inward of the hollow chamber and is movable in a radially restricted manner. With such a configuration, the processing of the spherically-shaped abutting surface inside the hollow chamber is eliminated.

According to a further advantageous development of the invention, the insert is arranged axially inside the cavity and is received in a notch having a larger diameter than the insert. Such an arrangement is provided especially for joints with offset. The advantage of such an arrangement is that the spherical bearing surface of the insert can be manufactured by deformation.

In another configuration of the present invention, the second contact surface is formed as a flat surface.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT The synchronous fixed joint shown in FIG. 1 mainly consists of an outer joint portion 1, an inner joint portion 2, a cage 3 and a ball 6 serving for torque transmission. Joint inner part 2
Is a partially spherical head 4 having a first abutment surface 12
Is supported by the second abutment surface 5 in the hollow chamber 17 of the outer joint portion 1. In this case, the joint inner part 2
It is functionally important that there is a gap between the and the second abutment surface 5.

In the embodiment according to FIG. 1, the cage 3 is prevented from moving axially outwards by the key 7 in the ring portion 18. The key 7 forming the ring portion 18 that supports only the retainer is designed such that after the joint inner portion 2 is fitted together with the retainer 3 and the ball 6 during assembly, the joint outer portion is loaded while applying inward pressure. Welded with 1. With such an arrangement, limited play adjustment of the joint is achieved.

The outer joint part 1 has a shaft 9 for receiving a connecting shaft, and the inner joint part 2 has a receiving hole 8 for receiving a connecting pin.

The ball 6 is arranged in the outer running groove 10 of the outer joint part 1 for transmitting torque and in the inner running groove 11 of the inner joint part 2 arranged in conformity with the outer run groove. It is provided.

In the embodiment of the synchronous fixed joint according to the invention shown in FIG. 2, the first abutment surface 1 of spherical design is used.
2 is formed integrally with the inner joint portion 2. further,
The second abutment surface 5 is formed by an insert 13, which is received with a radial play in the recess 14 in the hollow chamber 17 of the outer joint part.
Radial play results from manufacturing tolerances and the first abutment surface 12 that occurs when the joint pivots in the offset-joint.
Helps compensate for the radial motion of the.

FIG. 2 shows the structural correspondence between the radii R and R2.

In the synchronous fixed joint shown in FIG. 3, the second contact surface is formed as a flat surface. This configuration compensates for radial movement of the first abutment surface.

In the synchronous fixed joint shown in FIG. 4, the partially spherical head 4 is adapted not to move in the radial direction via the centering ring 19 in the annular chamber 20 in the inner portion of the joint.

In the outer joint part 1 produced from sheet metal, for example by deep drawing, shown in FIG. 5, a ring part 18 is formed by a guide surface 7a directed radially inward. The outer joint part 1 is provided with a connecting pin 16, which is preferably connected to the outer joint part 1 by welding. The connection pin 16 simultaneously
It forms a second abutment surface 5 for the joint inner part 2 or the part-spherical head 4.

In the outer joint part, which is also formed from sheet metal, as shown in FIG. 6, the connecting pins 16 are deep-drawn together as a unit. Furthermore, the second abutment surface 5 belongs to the insert 13, which can be moved radially in the hollow chamber 17 of the outer joint part 1.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view of a synchronous fixed joint according to the present invention having a joint inner portion supported via a partially spherical head.

FIG. 2 is a vertical sectional view of a synchronous fixed joint having a first abutment surface integrally formed with an inner portion of the joint.

FIG. 3 is a vertical cross-sectional view of a synchronous fixed joint having a first abutment surface integrally formed on an inner portion of the joint and a second abutment surface formed as a flat surface.

FIG. 4 is a longitudinal sectional view of a synchronous fixed joint having a centering member for a partially spherical head in an inner portion of the joint.

FIG. 5 is a joint outer portion embossed from a thin plate,
It is a longitudinal cross-sectional view of the synchronous fixed joint which has a connection pin which forms a 2nd contact surface.

FIG. 6 is a longitudinal sectional view of a synchronous fixed joint formed from a thin plate having a deep-drawn connection pin and an insert body serving as a second contact surface.

[Explanation of symbols]

 1 Joint Outer Part 2 Joint Inner Part 3 Cage 4 Head 5 Second Abutment Surface 6 Sphere 7 Key 7a Guide Surface 8 Receiving Hole 9 Shaft 10 Outer Travel Groove 11 Inner Traveling Groove 12 First Abutment Surface 13 Insert 14 Notch 16 Connection Pin 17 Hollow Chamber 18 Ring Part 19 Centering Ring 20 Annular Chamber

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Werner Krude, Federal Republic of Germany Neunkirchen-Woerperat, Pfarer-Stauuf-Strasse 32

Claims (11)

[Claims] 1. A joint having an outer running groove formed in the shape of a bell, having hollow chambers, and having outer running grooves evenly distributed on the peripheral surface, and an inner running groove matching the outer running groove. It has an inner part and a sphere that is received in the inner running groove and the outer running groove and transmits torque, wherein the sphere is
Retained in an opening of a retainer arranged between the outer joint part and the inner joint part, said inner joint part being provided in a hollow chamber of the outer joint part by means of an abutment surface belonging to said inner joint part. In a synchronous fixed joint of the type axially supported inwardly on a bearing surface which matches said bearing surface, said cage (3) being controlled only via a ball (6), And axially restricted hollow chamber (17)
Is axially supported outward by a ring portion (18) located on the open side of the retainer (3), and a retainer (3) is attached to the inner surface of the outer joint portion (1) and the outer surface of the inner joint portion (2). Synchronous fixed joint characterized in that they are arranged at intervals. 2. A ring part (18) is formed by keys (7) welded to the outer joint part (1) between the outer running grooves (10) under inward pressure during joint assembly. The synchronous fixed joint according to claim 1. 3. The ring portion (18) has an outer running groove (1).
Synchronous fixed joint according to claim 1 or 2, characterized in that it is formed by guide surfaces (7a) arranged radially inwardly between 0). 4. A spherically shaped second abutment surface (5) is defined by a radius (R), the center of the corresponding abutment surface being located at a distance from the center line. In addition, the radius (R) is equal to the first contact surface (1
2) The radius (R
The synchronous fixed joint according to any one of claims 1 to 3, which is longer than 2). 5. Synchronous fixed joint according to claim 1, wherein the second abutment surface (5) is formed by a cone. 6. A first contact surface (1) formed in a spherical shape.
2. The synchronization according to claim 1, wherein 2) is integrally formed on the inner joint part and a supported insert is provided between the inner joint part and the second abutment surface (5). Fixed joint. 7. A first abutting surface (1) formed in a spherical shape.
2) is arranged as a separate part-spherical head (4) on the side of the joint inner part (2) which faces the inside of the hollow chamber (17) and which is connected to the joint inner part (2) and the second part. 3. A space between the contact surface (5) and the contact surface (5).
Synchronous fixed joint described. 8. A part-spherical head (4) is centered with respect to the inner joint part (2) via a centering member (19). Synchronous fixed joint. 9. The second abutment surface (5) is formed by an insert (13) arranged axially inside the hollow chamber (7). Synchronous fixed joint. 10. A joint (13) in which the radius (R2) is located on the centerline outside the joint center.
Synchronous fixing according to any one of the preceding claims, wherein the is arranged axially inside the hollow chamber (17) and is received in a notch (14) having a larger diameter than the insert (13). Type fitting. 11. The synchronous fixed joint according to claim 1, wherein the second abutment surface (5) is formed as a flat surface.