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Shaft having a journal

A bearing and longitudinal axis technology, used in rigid shaft couplings, couplings, elastic couplings, etc., can solve problems such as increasing wear, hindering the purpose of use, and deteriorating efficiency, and achieves high efficiency and reduced wear. Effect

Active Publication Date: 2014-01-29
SFS GRP INT AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] That is to say, the main problem in such a ball screw drive is that in the case of a wrong orientation of the two bearings or in the case of a deformation of the screw, that is, in the case where the longitudinal axis of the drive part and the thread part have an opposite In the case of a radial offset or an inclination angle, the ball screw drive may seize during use and this may impede fulfillment of the purpose of use, may be subject to significantly increased wear and may have deteriorated efficiency

Method used

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Examples

Experimental program
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Embodiment Construction

[0042] figure 1 Shown is a longitudinal sectional view of a first embodiment of a threaded spindle according to the invention, generally designated 10 . The lead screw 10 comprises: a drive portion 20 having a longitudinal axis A and supported by a first bearing 70; and a threaded portion 30 having a longitudinal axis B; and a nut 50 supported by a second bearing 80a and The threaded portion 30 is guided in this nut. There are at least two embodiments for the second bearing, figure 1 A first embodiment of which is shown and marked 80a while Figure 17 A second embodiment is shown and designated 80b. according to figure 1 As shown in the figure, the threaded part 30 and the nut 50 have threads 31 or 51 respectively, and these threads mesh with each other. The thread 31 is an external thread, and the thread 51 is an internal thread. The driving part 20 and the threaded part 30 are constructed as separate parts, which are respectively provided with engagement elements 25...

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PUM

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Abstract

The invention relates to a threaded spindle (11), having a drive part (20), which has a longitudinal axis (A) and is mounted by a first journal (70), and having a threaded part (30), which likewise has a longitudinal axis (B), and having a threaded nut (50), which is mounted by a second journal (80a; 80b) and in which the threaded part (30) is guided. The drive part (20) and the threaded part (30) are formed as separate parts and are each provided with at least one coupling element (25, 55), which are connected to each other in an articulated manner by plugging together. A mutual offset or inclination angle (a) of the longitudinal axes (A, B) of the drive part (20) and of the threaded part (30) can be compensated in this manner. The two-part threaded spindle (11) forms a threaded drive with the threaded nut (50) thereof, which can for example be used in a parking brake of a vehicle braking system. The swinging function created between the drive part (20) and the threaded part (30) reduces transverse forces, which increases efficiency and reduces wear compared to a known threaded drive with a single-part threaded spindle.

Description

technical field [0001] The invention relates to a screw comprising: a drive part having a longitudinal axis and supported by a first bearing; a threaded part also having a longitudinal axis; and a nut supported by a second bearing and The threaded portion is guided in the nut. Background technique [0002] Such threaded screws with nuts are generally designed in the prior art as ball screw drives, which can be used in the field of lid and door opening systems (Klappen und Tueroeffnungssysteme) and in particular in the field of vehicles. In vehicles, it can be used, for example, in vehicle brakes. In this case, the drive part is rotated by means of an electric motor. In this way, a longitudinal movement of the nut actuates the brake piston and thus acts as a braking device for the vehicle brake. The threaded portion is in contact with the nut through balls. In a spindle / ball-slewing bushing arrangement (Spindel- / Kagelumlaufbuechsenanordnung) known from document DE 101 50...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H25/24F16D1/10F16D3/02F16D65/18B62D5/04F16D125/40F16D65/56
CPCF16D2125/40F16H25/24F16H2025/2445F16D1/10F16D3/02F16D1/116F16D3/04Y10T74/19721F16H25/2015F16H25/20
Inventor H·库斯特
Owner SFS GRP INT AG
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