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Ball screw with ball returning device and electric parking brake with ball screw

A ball screw and ball technology, applied in the direction of transmission, brake actuator, belt/chain/gear, etc., can solve the problems of reducing efficiency, improving sliding parts, increasing wear of balls and thread channels, etc., to reduce wear, Simple structure and novel effect

Inactive Publication Date: 2017-02-01
CIXING GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The disadvantage of this originally described ball screw design is that the spring and / or spring elements and intermediate pieces create a preload in the ball chain and significantly lift the sliding part relative to the sliding part in the ball channel
Since sliding friction has a higher coefficient of friction than rolling friction, this will result in increased ball and thread channel wear and reduced efficiency

Method used

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  • Ball screw with ball returning device and electric parking brake with ball screw
  • Ball screw with ball returning device and electric parking brake with ball screw
  • Ball screw with ball returning device and electric parking brake with ball screw

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Embodiment Construction

[0027] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention will be further elaborated below.

[0028] see Figure 1 to Figure 4 The shown ball screw 1 with ball reversing device can be used for electric parking brakes. The ball screw 1 comprises a screw shaft 3 and a ball nut 5 , wherein the ball nut 5 is arranged rotatably on a threaded section 301 of the screw shaft 3 . The screw shaft 3 and the ball nut 5 are coaxially arranged. In this embodiment, the ball screw 1 is integrated into the brake cylinder of the hydraulic service brake by utilizing common knowledge in the field, and other components of the electric parking brake are not shown in this figure, and the electric parking brake and the hydraulic pressure of the motor vehicle Service brake combination. Wherein the DC motor is connected with the lead screw shaft 3 through a force fit through a self-locking decele...

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PUM

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Abstract

The invention discloses a ball screw with a ball returning device. The ball screw comprises a ball nut and a screw shaft. The ball nut is arranged on the screw shaft in a rotatable mode and forms a spirally-wound ball channel together with the screw shaft so that balls can roll. The ball screw is provided with the ball returning device. The ball returning device comprises at least one returning channel which is located between a set of threaded tail end and threaded starting point of the ball channel and used for returning the balls, and hence the balls can roll back and forth at unlimited times. The invention further discloses an electric parking brake with the ball screw.

Description

technical field [0001] The invention relates to the field of parking brakes, in particular to a ball screw with a ball reversing device and an electric parking brake with the ball screw. Background technique [0002] The use of electric parking brake systems in motor vehicles, in which the mechanical parking brake is replaced by an electric drive with an electric drive, is known from the prior art. To perform the braking process, the rotational motion of the motor is converted by a ball screw into a translational motion, where the brake pads come into contact with the braking surface. Such electric parking brake systems are usually integrated into the calipers of the hydraulic service brakes so that the calipers perform the service and parking brake functions as a combined caliper. In this combined execution process, the rotational motion of the motor is converted into translational motion through the ball screw and applied to the axial displacement of the brake piston of t...

Claims

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Application Information

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IPC IPC(8): F16H25/22F16D65/14F16D121/14F16D125/40
CPCF16H25/2228F16D65/14F16D2121/14F16D2125/40
Inventor 亚历山大·富利科
Owner CIXING GROUP
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