Hydrodynamic brake

Abstract

The invention relates to a retarder having the following features: a rotor ( 1 ) and a stator ( 2 ) that, together, form a working space ( 3 ); a hollow shaft ( 4 ) for connecting, in a rotationally fixed manner, an input shaft ( 5 ), which is near a transmission, to an output shaft ( 6 ), which is near a cardan shaft, and; the hollow shaft support s the rotor by means of a screw thread ( 4.1.1 ).

Description

technical field

[0001] The present invention relates to a hydraulic brake, also known as a "vehicle retarder", especially for automobiles. Background technique

[0002] Such a reducer has two bucket wheels, one of which is stationary (stator) and the other is rotating (rotor). The two bucket wheels mutually form a torus-shaped working chamber. The working chamber is filled with a working medium, for example an oil, for braking purposes. However, in the non-braking operating phase, there is no working medium in the working chamber.

[0003] During the non-braking operating phase, however, air is present in the working chamber. This produces undesired braking torques and thus power losses, which increases energy losses.

[0004] Numerous measures for reducing the power loss are known. The purpose of such a measure is to make the rotor and the stator movable relative to each other in the axial direction. In the non-braking operating phase, the rotor and stator are separat...

Examples

Embodiment Construction

[0027] figure 1 The gear unit shown in is constructed as follows: a rotor 1 and a stator 2 are each designed as a bucket wheel and a torus-shaped working chamber 3 is formed between them. The rotor is supported on a hollow shaft 4 . The hollow shaft is connected in a rotationally fixed manner to a shaft 5 adjacent to a cardan shaft (not shown) and to a shaft 6 adjacent to a transmission gearbox (not shown). The shaft 5 is extendable in the hollow shaft 4 and is equipped with a flange 5.1 for torque transmission.

[0028] The stator 2 has a stator housing 2.1. The rotor 1 has a rotor housing 1.1.

[0029] The rotor 1 is indirectly supported by the hollow shaft 4 . Because the hollow shaft 4 itself carries a threaded ring 4.1. The threaded ring has a steep thread 4.1.1 on its outer circumference. The rotor 1 is provided with a corresponding steep thread 1.1.1 on its inner circumference. The two steep threads 4.1.1 and 1.1.1 work together. They have a pitch that satisfies...

technical field

[0001] The present invention relates to a hydraulic brake, also known as a "vehicle retarder", especially for automobiles. Background technique

[0002] Such a reducer has two bucket wheels, one of which is stationary (stator) and the other is rotating (rotor). The two bucket wheels mutually form a torus-shaped working chamber. The working chamber is filled with a working medium, for example an oil, for braking purposes. However, in the non-braking operating phase, there is no working medium in the working chamber.

[0003] During the non-braking operating phase, however, air is present in the working chamber. This produces undesired braking torques and thus power losses, which increases energy losses.

[0004] Numerous measures for reducing the power loss are known. The purpose of such a measure is to make the rotor and the stator movable relative to each other in the axial direction. In the non-braking operating phase, the rotor and stator are separat...

Examples

Embodiment Construction

[0027] figure 1 The gear unit shown in is constructed as follows: a rotor 1 and a stator 2 are each designed as a bucket wheel and a torus-shaped working chamber 3 is formed between them. The rotor is supported on a hollow shaft 4 . The hollow shaft is connected in a rotationally fixed manner to a shaft 5 adjacent to a cardan shaft (not shown) and to a shaft 6 adjacent to a transmission gearbox (not shown). The shaft 5 is extendable in the hollow shaft 4 and is equipped with a flange 5.1 for torque transmission.

[0028] The stator 2 has a stator housing 2.1. The rotor 1 has a rotor housing 1.1.

[0029] The rotor 1 is indirectly supported by the hollow shaft 4 . Because the hollow shaft 4 itself carries a threaded ring 4.1. The threaded ring has a steep thread 4.1.1 on its outer circumference. The rotor 1 is provided with a corresponding steep thread 1.1.1 on its inner circumference. The two steep threads 4.1.1 and 1.1.1 work together. They have a pitch that satisfies...

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