Screw drive

Patent metadata

Field	Value
Publication number	US-10859154-B2
Application number	US-201816052808-A
Country	US
Kind code	B2
Filing date	Aug 2, 2018
Priority date	Aug 24, 2017
Publication date	Dec 8, 2020
Grant date	Dec 8, 2020

Abstract

A screw drive includes a spindle and a nut with a nut body. The nut body has at least one hole for a fastening member that is configured to enable the screw drive to be fastened on a higher-level subassembly or on a higher-level construction component. The at least one hole is further configured as a coolant duct of a coolant path. In one embodiment, an interior space between the nut body and the spindle is configured as a coolant duct.

First claim

What is claimed is:

1. A screw drive, comprising:
a spindle nut having a nut body; and
a spindle surrounded by the spindle nut,
wherein the nut body has at least one through hole that is configured to receive a fastening member and form a coolant duct of a portion of a first coolant path, the fastening member configured to protrude from at least one end of two mutually opposite ends of the nut body and connect the spindle nut to a higher-level subassembly.

2. The screw drive according to claim 1 , wherein the nut body has a flange, and wherein the at least one through hole is formed in the flange.

3. The screw drive according to claim 1 , wherein the at least one through hole is a plurality of through holes.

4. The screw drive according to claim 3 , wherein the two mutually opposite ends are each covered by a cover, and wherein at least one cover defines at least one fluid duct configured to fluidically connect at least two through holes.

5. The screw drive according to claim 4 , wherein the at least one cover is a unitary body that encircles the spindle, and wherein the at least one fluid duct is configured as a groove in the at least one cover.

6. The screw drive according to claim 5 , wherein the groove is recessed axially in the at least one cover.

7. The screw drive according to claim 3 , wherein at least one first opening of each through hole is an inlet opening for a coolant, and wherein at least one second opening of each through hole is an outlet opening for the coolant.

8. The screw drive according to claim 7 , wherein the two mutually opposite ends are each covered by a cover, and wherein, in the case of the plurality of through holes, the inlet openings are arranged alternately on the two ends when viewed in the circumferential direction of the nut body.

9. The screw drive according to claim 7 , wherein, in the case of the plurality of through holes, the inlet opening of a first through hole is connected to one fluid connection, and the outlet opening of a further through hole is connected to a further fluid connection.

10. The screw drive according to claim 3 , wherein the coolant path extends in a meandering way via the through holes from an inlet-side fluid connection to an outlet-side fluid connection.

11. The screw drive according to claim 3 , wherein the two mutually opposite ends are each covered by a cover, wherein each cover defines respective fluid ducts configured to fluidically connect the through holes.

12. The screw drive according to claim 11 , wherein each cover is a unitary body that encircles the spindle, and wherein each fluid duct is configured as a groove in the respective cover.

13. The screw drive according to claim 1 , wherein at least one first opening of the through hole is an inlet opening for a coolant, and wherein at least one second opening of the through hole is an outlet opening for the coolant.

14. The screw drive according to claim 13 , wherein the coolant is air.

15. The screw drive according to claim 1 , further comprising an attachment configured to introduce fluid into an interior space disposed between the nut body and the spindle, the attachment arranged on the end of the nut body and the interior space configured as a coolant duct of a portion of a second coolant path.

16. The screw drive according to claim 15 , further comprising a sealing element on the outer end section of the attachment when viewed in the longitudinal direction, wherein the sealing element has a smaller sealing gap than a further sealing element disposed on the end of the nut, and wherein the sealing elements seal off the interior space at the ends when viewed in the longitudinal direction.

17. The screw drive according to claim 15 , wherein the attachment is configured as a sleeve that defines an annular feed space radially on the inside, the feed space being open toward the nut body and closed at least partially radially toward the inside, radially toward the outside, and axially toward the outside.

18. The screw drive according to claim 1 , wherein an interior space disposed between the nut body and the spindle is configured as a coolant duct of a portion of a second coolant path, the second coolant path disposed substantially radially inwardly from the first coolant path.

19. The screw drive according to claim 18 , wherein the first and second coolant paths have a common inlet opening and separate outlet openings.

20. The screw drive according to claim 1 , wherein the nut body defines a fluid duct configured to carry coolant from the outside into an interior space disposed between the nut body and the spindle, the interior space configured as a coolant duct of a portion of a second coolant path.

Assignees

• Bosch Gmbh Robert

Inventors

• Schmaeling Franz
• Ament Helmut
• Ziegler Mario
• Korbacher Michael
• Groganz Thomas

Classifications

• F16H57/0417

  Heat exchangers adapted or integrated in the gearing · CPC title

• F16H57/0497 Primary

  Screw mechanisms · CPC title

• F16H25/2252

  Planetary rollers between nut and screw · CPC title

• F16H57/0416

  Air cooling or ventilation · CPC title

• F16H25/2418

  Screw seals, wipers, scrapers or the like · CPC title