Electromechanical spindle drive

Patent metadata

Field	Value
Publication number	US-12580447-B2
Application number	US-202218276108-A
Country	US
Kind code	B2
Filing date	Feb 22, 2022
Priority date	Feb 23, 2021
Publication date	Mar 17, 2026
Grant date	Mar 17, 2026

Abstract

An electromechanical spindle drive includes a housing, a motor, a rotational part in the form of a spindle nut, the rotational part being rotated by the motor about a rotational axis, a spindle which interacts with the rotational part, the threaded section of which is arranged within the rotational part and which exits the rotational part at a spindle outlet end, and bearings by means of which the rotational part is rotatably mounted relative to the housing, wherein at least one, preferably at least two of the bearings, are arranged in the region of the spindle outlet end of the rotational part and/or are designed in the form of a radial bearing.

First claim

The invention claimed is:

1 . An electromechanical spindle drive comprising:
a housing, a motor, a rotational part comprising a spindle nut, wherein the rotational part is rotatable by the motor about a rotational axis, a spindle interacting with the rotational part and comprising a, threaded section arranged within the rotational part and exiting the rotational part at a spindle outlet end, and a plurality of bearings rotatably mounting the rotational part relative to the housing, wherein a bearing of the plurality of bearings is arranged in a region of the spindle outlet end of the rotational part, inside the rotational part and on an inner side of the rotational part.

2 . The electromechanical spindle drive according to claim 1 , wherein the bearing arranged in the region of the spindle outlet end of the rotational part is arranged between an inside of the rotational part and a bearing seat projecting into an interior of the rotational part.

3 . The electromechanical spindle drive according to claim 1 , wherein the bearing arranged in the region of the spindle outlet end of the rotational part is arranged so as to axially overlap with at least one of a stator and a rotor of the motor or is arranged within an area enclosed by the at least one of the stator and the rotor or is arranged so as to axially overlap and be within the area enclosed by the at least one of the stator and the rotor.

4 . The electromechanical spindle drive according to claim 1 , wherein the bearing arranged in the region of the spindle outlet end of the rotational part is a rolling bearing.

5 . The electromechanical spindle drive according to claim 1 , wherein at least one bearing of the plurality of bearings is arranged in an area of an end of the rotational part opposite the spindle outlet end.

6 . The electromechanical spindle drive according to claim 1 , wherein at least one bearing of the plurality of bearings is an axial bearing arranged in an area between the motor and a braking device of the electromechanical spindle drive.

7 . The electromechanical spindle drive according to claim 1 , wherein at least one of a stator of the motor surrounds the rotational part a rotor of the motor comprises pole elements mounted on an outside of the rotational part and, the motor is a synchronous motor.

8 . An electromechanical spindle drive comprising:
a housing, a motor, a rotational part comprising a spindle nut, wherein the rotational part is rotatable by the motor about a rotational axis, a spindle interacting with the rotational part and comprising a threaded section arranged within the rotational part and exiting the rotational part at a spindle outlet end, a plurality of bearings rotatably mounting the rotational part relative to the housing, and a rolling spindle drive in which rolling elements are guided in a circulating path, wherein a first portion of the circulating path is formed between an internal thread of the rotational part and an external thread of the spindle and a second portion of the circulating path is formed by a return channel, formed in an interior of the spindle.

9 . An electromechanical spindle drive comprising:
a housing, a motor, a rotational part comprising a spindle nut, wherein the rotational part is rotatable by the motor about a rotational axis, a spindle interacting with the rotational part and comprising a threaded section arranged within the rotational part and exiting the rotational part at a spindle outlet end, a plurality of bearings rotatably mounting the rotational part relative to the housing, and an attachment part at an end of the rotational part opposite the spindle outlet end and connected to the rotational part, wherein a portion of the attachment part located outside the rotational part is formed in a shape of a pin, wherein a longitudinal axis of the portion of the attachment part formed in the shape of the pin coincides with the rotational axis of the rotational part.

10 . The electromechanical spindle drive according to claim 9 , wherein a maximum diameter of a portion of the attachment part located inside the rotational part is at least 3 times as large as a diameter of the portion of the attachment part formed in the shape of the pin.

11 . An electromechanical spindle drive comprising:
a housing, a motor, a rotational part comprising a spindle nut, wherein the rotational part is rotatable by the motor about a rotational axis, a spindle interacting with the rotational part and comprising a threaded section arranged within the rotational part and exiting the rotational part at a spindle outlet end, a plurality of bearings rotatably mounting the rotational part relative to the housing, an attachment part at an end of the rotational part opposite the spindle outlet end and connected to the rotational part, and a sensor device, wherein a portion of the attachment part located outside the rotation part is disposed in a detection range of the sensor device.

12 . An electromechanical spindle drive comprising:
a housing, a motor, a rotational part comprising a spindle nut, wherein the rotational part is rotatable by the motor about a rotational axis, a spindle interacting with the rotational part and comprising a threaded section arranged within the rotational part and exiting the rotational part at a spindle outlet end, a plurality of bearings rotatably mounting the rotational part relative to the housing, an attachment part at an end of the rotational part opposite the spindle outlet end and connected to the rotational part, and a lubricant channel is configured in the attachment part for supplying lubricant to an interior of the rotational part.

13 . The electromechanical spindle drive according to claim 12 , wherein a path of a first portion of the lubricant channel is aligned with the rotational axis of the rotational part.

14 . The electromechanical spindle drive according to claim 13 , wherein a path of a second portion of the lubricant channel has a radial component with respect to the rotational axis or is oblique to the rotational axis or has a radial component with respect to the rotational axis and is oblique to the rotational axis.

15 . An electromechanical spindle drive comprising:
a housing, a motor, a rotational part comprising a spindle nut, wherein the rotational part is rotatable by the motor about a rotational axis, a spindle interacting with the rotational part and comprising a threaded section arranged within the rotational part and exiting the rotational part at a spindle outlet end, a plurality of bearings rotatably mounting the rotational part relative to the housing, an attachment part at an end of the rotational part opposite the spindle outlet end and connected to the rotational part, and a braking device surrounding the attachment part.

16 . The electromechanical spindle drive according to claim 1 , wherein cooling fins are arranged on an outside of the housing, at least in an area of the motor, wherein the cooling fins are removable from the housing body.

17 . The electromechanical spindle drive according to claim 1 , comprising a modular design.

18 . The electromechanical spindle drive according to claim 1 , further comprising a braking device which can be actuated between a braking position and a released position, wherein the braking device acts on the rotational part.

19 . The electromechanical spindle drive according to claim 1 , further comprising a braking device having a brake disc that rotates

Assignees

• Trumpf Maschinen Austria Gmbh & Co Kg

Inventors

• Speziali Stefano

Classifications

• H02K7/102

  with friction brakes · CPC title

• H02K7/086

  radially supporting the rotor around a fixed spindle; radially supporting the rotor directly (H02K7/09 takes precedence) · CPC title

• H02K5/1737

  radially supporting the rotor around a fixed spindle; radially supporting the rotor directly · CPC title

• H02K1/2706

  Inner rotors · CPC title

• F16H25/2228

  the device for circulation forming a part of the screw member · CPC title