TOLERANCE RING WITH STOP

Abstract

A tolerance ring is an intermediate element for a shaft/hub connection that is positioned in a groove between shaft and hub and that produces a force-fitting connection between these two elements. It has substantially the shape of a hollow cylinder, wherein the lateral surface thereof has embossments in the form of radially inwardly and/or outwardly pointing elevations. Here, provision is made at one longitudinal end of a flange-like collar, which is applied in a radial plane with respect to the central longitudinal axis. The tolerance ring is preferably manufactured in one piece with the flange-like collar from metal as a deep-drawn part, preferably being manufactured from aluminum or an aluminum alloy. An assembly method for such a tolerance ring, and a ball screw drive, and a screw drive, having such a tolerance ring are also provided.

Claims

1. A tolerance ring, comprising: a substantially hollow-cylindrical basic shape with a first axial longitudinal end and a second axial longitudinal end and with a central longitudinal axis; a lateral surface of the hollow cylinder has embossments in the form of comprising embossments formed of at least one of radially inwardly or outwardly pointing elevations; and a flange-shaped collar applied at the second axial longitudinal end in a radial plane with respect to the central longitudinal axis.

2. The tolerance ring as claimed in claim 1, wherein the tolerance ring with the flange-shaped collar is formed in one piece from metal as a deep-drawn part.

3. The tolerance ring as claimed in claim 1, wherein the tolerance ring is comprised manufactured from aluminum or an aluminum alloy.

4. The tolerance ring as claimed in claim 1, wherein a transition region from the hollow-cylindrical basis shape to the flange-shaped collar is smooth.

5. The tolerance ring as claimed in claim 1, wherein the embossments in the lateral surface are realized as surface structures which are corrugated, fluted or embossed in a ribbed manner.

6. A method for securing in a defined end position a flat ring element that is to be attached to the threaded spindle of a ball screw drive, the method comprising the steps of: providing a threaded spindle having a substantially cylindrical thread-free end portion; providing a target position on said end portion of the threaded spindle, said target position has a longitudinal stop which is configured to limit a movement of the flat ring element in a first axial direction; pushing the flat ring element onto the end portion until the longitudinal stop is reached; and bringing a tolerance ring as claimed in claim 1 onto the end portion of the threaded spindle, with the flange-shaped collar at a front, until the collar, in a defined manner, presses the ring element against the longitudinal stop and fixes said ring element in the target position.

7. The method as claimed in claim 6, further comprising, for securing the ring element, pressing a region of the flange-shaped collar in a punctiform or areal manner against the end portion of the threaded ring.

8. The method as claimed in claim 7, further comprising providing an encircling incision in the end portion of the threaded spindle in a region of the target position, into which encircling incision the transition region of the tolerance ring engages after being pressed on.

9. The method as claimed in claim 6, wherein the threaded spindle provided with the tolerance ring is connected to a hub.

10. A ball screw drive, comprising: a threaded spindle which has an outer thread and a spindle nut which engages around said spindle and which has an inner thread; thread flights are configured as mutually complementary ball grooves which, in a fitted state between threaded spindle and spindle nut, receive a multiplicity of balls, said balls being kept in endless ball circulation by a ball return guide which bridges one or more thread turns; at one longitudinal end, the threaded spindle has a substantially cylindrical thread-free end portion with a target position, said target position being provided with a longitudinal stop which is configured to limit a movement of a ring element provided there in a first axial direction; and a tolerance ring as claimed in claim 1 that is pushed onto the end portion of the threaded spindle and defines an end position of a ring element.

11. A screw drive, comprising: a threaded spindle which has an outer thread and a spindle nut which engages around said spindle and which engages with the outer thread of said spindle via a complementary inner thread; at one longitudinal end, the threaded spindle has a substantially cylindrical thread-free end portion with a target position, said target position being provided with a longitudinal stop which is configured to limit a movement of a ring element provided there in a first axial direction; and a tolerance ring as claimed in claim 1 is pushed onto an end portion of the threaded spindle and defines an end position of a ring element.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0021] FIG. 1 shows a tolerance ring according to the present description in a side view.

[0022] FIG. 2 shows the tolerance ring in FIG. 1 in an axial plan view, in the cross section of the plane B-B.

[0023] FIG. 3 shows a ring element on the end portion of a threaded spindle, secured by a tolerance ring with stop flange according to the present invention, in longitudinal section.

[0024] FIG. 4 shows a ring element secured according to the prior art in longitudinal section.

DETAILED DESCRIPTION

[0025] FIGS. 1 and 2 show a side view and cross-sectional view, respectively, of the same component and are therefore described together. A tolerance ring 100 with stop, as shown here, has two basic functional regions. The main body or the basic shape 130 is a hollow cylinder with a central longitudinal axis 140 and with a first longitudinal end 110 which terminates in a cylindrical manner. The second longitudinal end 120 bears the flange-like collar 160, which lies in a radial plane 170 which is oriented perpendicularly to the central longitudinal axis. A smooth transition region 190 marks the transition from the hollow cylinder 130 into the collar 160. The lateral surface 180 of the hollow-cylinder basic shape 130 is in some regions ribbed, corrugated, or deformed out of the purely cylindrical shape, in order to form the embossments 150, 150′, 150″. As FIG. 2 shows in cross section, in this way, a clear inner radius and a clear outer radius are defined by the peaks and troughs, respectively, of the embossments.

[0026] FIGS. 3 and 4 show the end portion 210, 310 of a threaded spindle 200 and 300, respectively. Such a threaded spindle may be both part of a ball screw drive or part of a nut/spindle screw drive. A ring element which, for example, forms a radial stop or the support disk of a bearing is denoted by 230 and 330, respectively. Said ring element is pushed onto the end portion 210, 310 and secured. In the case of FIG. 4, according to the prior art, this is realized by a securing ring 320.

[0027] FIG. 3 shows the solution according to the invention. The ring element 230 abuts against the axial longitudinal stop 240 in the end portion 210 in a defined manner. A tolerance ring 100 is in a state pushed onto the end of the threaded spindle 200 such that the flange-like collar 160, together with the longitudinal stop 240, fixes the ring element 230 in the target position 220 in a defined manner. An encircling incision 250 in the threaded spindle 250 makes it possible to provide a defined seat through compression or pressing-on at least of the transition region 190 of the tolerance ring.