IP Library › Granted Patent US 12,447,598
Granted Patent B2
US 12,447,598 · App. 18/524,106 · Granted Oct 21, 2025

Hand-held machine tool comprising a spacer element

Inventors: Tobias Herr (Stuttgart, DE); Jens Blum (Filderstadt, DE)
Assignee: Robert Bosch GmbH
B25F5/00B25F5/02B25F5/001B25F5/029F16J15/4472
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Quick Facts
Patent No.
US 12,447,598
App. No.
18/524,106
Granted
Oct 21, 2025
Kind
B2
Abstract

The disclosure relates to a hand-held machine tool comprising a tool receptacle and a housing, in which a drive motor having a motor shaft and a transmission are arranged. The transmission is arranged in a transmission housing, and wherein a spacer element is arranged between the transmission and the drive motor, which spacer element comprises a disc-shaped base body on which a tubular mounting portion is formed for mounting on the motor shaft, said spacer element forming a seal, in particular a labyrinth seal.

Claims (28)

1. A hand-held machine tool comprising:

a tool receptacle; and

a drive motor having a motor shaft;

a transmission; and

a housing in which the drive motor and transmission are arranged,

wherein:

the transmission is arranged in a transmission housing,

a spacer element is arranged between the transmission and the drive motor, the spacer element comprising a disc-shaped base body on which a tubular mounting portion is arranged, the mounting portion designed for mounting on the motor shaft,

the spacer element forms a labyrinth seal,

the transmission comprises an intermediate shaft which forms a pot-shaped receptacle, and

at least portions of the mounting portion are arranged in the pot-shaped receptacle.

2. The hand-held machine tool according to claim 1 , wherein:

the mounting portion of the spacer element engages the motor shaft along the transmission housing in a direction of an axis of rotation of the tool receptacle.

3. The hand-held machine tool according to claim 1 , wherein:

the drive motor comprises a rotor, and

a front side of the disc-shaped base body facing away from the mounting portion adjoins the rotor.

4. The hand-held machine tool according to claim 1 , wherein:

a front side of the mounting portion facing the transmission comprises at least one receptacle which is designed to collect lubricant coming from the transmission.

5. The hand-held machine tool according to claim 4 , wherein:

the receptacle is designed according to a type of annular ring segment or annular ring.

6. The hand-held machine tool according to claim 1 , wherein:

the transmission comprises a bearing element fixed in the transmission housing in which bearing element the pot-shaped receptacle of the intermediate shaft is rotatably supported.

7. The hand-held machine tool according to claim 6 , wherein:

at least sections of the bearing element and the mounting portion are arranged coaxially with respect to one another.

8. The hand-held machine tool according to claim 6 , wherein:

the disc-shaped base body features an outer diameter that is greater than an inner diameter of the bearing element.

9. The hand-held machine tool according to claim 1 , wherein:

a radial gap is formed between an outer diameter of the mounting portion and an inner diameter of the pot-shaped receptacle.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Feb 7, 2024
From: HERR, TOBIAS; BLUM, JENS
To: ROBERT BOSCH GMBH
Reel/Frame 066401/0614 →
Priority Claims (1)
DE 10 2022 212 835.4 · Nov 30, 2022 · national
Continuity (1)
Related Publication 20240175496A1 · May 30, 2024
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