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US 9,312,736 B2Granted
Electric machine, in particular of a pump unit
AssigneeBaumueller Nuernberg GmbH
InventorsFrank Gutjahr, Peter Lemke
Life of this patent
Estimating the term…
Abstract
An electric machine has in a machine housing, a stator and a rotor which is arranged on a motor shaft which is supported on a non-drive side in a bearing unit which has a ball bearing arrangement and is arranged within the machine housing in a radially elastic and axially displaceable manner. The electric machine is preferably coupled on the drive side without a bearing via a rigid shaft coupling to a work machine, in particular to a hydraulic pump.
Claims14
An electric machine, comprising:
- a motor shaft containing a bearing-side shaft shank having a circumferential side with an annular groove formed therein;
- a machine housing;
- a stator disposed in said machine housing;
- a rotor disposed in said machine housing and disposed on said motor shaft supported on a non-drive side;
- a bearing unit on said non-drive side disposed axially displaceably within said machine housing and having a ball bearing configuration with bearing inner rings, said bearing unit further having a sleeve enclosing said ball bearing configuration, and an elastomeric element, on which said sleeve rests radially elastically such that said sleeve can be displaced in an axial direction;
- a coupling unit, said motor shaft being guided out of said machine housing on a drive side without a bearing and guided to said coupling unit;
- a shrink disk disposed at said coupling unit and providing a rigid coupling of said motor shaft to a machine shaft of a work machine;
- and
- said bearing unit further having an inner securing ring for axially fixing an adjacent one of said bearing inner rings of said ball bearing configuration, said inner securing ring having a ring outer edge seated in said annular groove disposed on said circumferential side in said bearing-side shaft shank of said motor shaft.
6 more elements
An electric machine comprising:
- a motor shaft having a bearing-side shaft shank with an annular groove formed therein, a machine housing, a stator disposed in the machine housing, a rotor disposed in the machine housing and disposed on the motor shaft supported on a non-drive side, a coupling unit, the motor shaft being guided out of the machine housing on a drive side without a bearing and guided to the coupling unit, and a shrink disk disposed at the coupling unit and providing a rigid coupling of the motor shaft to a machine shaft of a work machine;
- a bearing unit including:
- a ball bearing configuration having bearing inner rings;
- a sleeve enclosing said ball bearing configuration;
- an elastomeric element, on which said sleeve rests radially elastically such that said sleeve can be displaced in an axial direction;
- and
- an inner securing ring for axially fixing an adjacent one of said bearing inner rings of said ball bearing configuration, said inner securing ring having a ring outer edge seated in the annular groove disposed on a circumferential side in the bearing-side shaft shank of the motor shaft.
4 more elements
A drive unit, comprising:
- a power machine, containing:
- a motor shaft having a bearing-side shaft shank with an annular groove formed therein;
- a machine housing;
- a stator disposed in said machine housing;
- a rotor disposed in said machine housing and disposed on said motor shaft supported on a non-drive side;
- a bearing unit on said non-drive side disposed axially displaceably within said machine housing and having a ball bearing configuration with bearing inner rings, said bearing unit further having a sleeve enclosing said ball bearing configuration, and an elastomeric element, on which said sleeve rests radially elastically such that said sleeve can be displaced in an axial direction;
- a coupling unit, said motor shaft being guided out of said machine housing on a drive side without a bearing and guided to said coupling unit;
- a shrink disk disposed at said coupling unit and providing a rigid coupling of said motor shaft to a machine shaft of a work machine;
- and
- said bearing unit further having an inner securing ring for axially fixing an adjacent one of said bearing inner rings of said ball bearing configuration, said inner securing ring having a ring outer edge seated in said annular groove disposed on a circumferential side in said bearing-side shaft shank of said motor shaft;
- and
- a work machine.
9 more elements
Dependencies are inferred from the claim text.