Hand-held machine tool having a damping element

Patent metadata

Field	Value
Publication number	US-9641046-B2
Application number	US-201113878778-A
Country	US
Kind code	B2
Filing date	Oct 11, 2011
Priority date	Oct 14, 2010
Publication date	May 2, 2017
Grant date	May 2, 2017

Abstract

A hand-held machine tool comprises a driving motor that is mounted in a machine tool housing and is used to drive a tool, and a damping element accommodated in the machine tool housing. At least one damping element is arranged between the housing of the driving motor and the machine tool housing and forms a support element for mounting and supporting the driving motor in the machine tool housing.

First claim

What is claimed is:

1. A hand-held power tool comprising:
a drive motor supported in a machine casing and configured to drive a tool; and
a plurality of damping elements positioned in the machine casing and configured to reduce oscillations,
wherein the damping elements are disposed between a motor casing of the drive motor and the machine casing and defines a carrier element configured to retain and support the drive motor in the machine casing,
wherein the damping elements are positioned around a circumference between the motor casing and the machine casing and spaced apart from each other about the circumference, and
wherein each damping element of the plurality of damping elements is held on a connecting carrier ring.

2. The hand-held power tool as claimed in claim 1 , wherein the drive motor is held in the machine casing exclusively by the damping elements.

3. The hand-held power tool as claimed in claim 1 , wherein the damping elements comprise compact damping blocks, and
wherein the damping blocks are polygonal blocks.

4. The hand-held power tool as claimed in claim 1 , wherein the damping elements are positioned in a receiving device in at least one of the motor casing and the machine casing.

5. The hand-held power tool as claimed in claim 1 , wherein the damping elements include a recess configured to enable the damping elements to slide onto a centering pin.

6. The hand-held power tool as claimed in claim 1 , wherein the damping elements are configured to enable vibration decoupling in at least two differing directions.

7. The hand-held power tool as claimed in claim 1 , wherein the damping elements include a rubber-elastic material.

8. A hand-held power tool comprising:
a machine casing
a drive motor retained in the machine casing, the drive motor including a motor casing and at least one damping element, the at least one damping element being configured to reduce oscillations of the drive motor,
wherein the at least one damping element is disposed between the motor casing of the drive motor and the machine casing and includes a carrier element configured to hold and support the drive motor in the machine casing,
wherein the machine casing has a centering pin, and
wherein the at least one damping element has a recess in which the pin is slidably received.

9. The hand-held power tool according to claim 8 , wherein the at least one damping element has at least one cavity and the machine casing has a convex geometry.

10. The hand-held power tool according to claim 8 , wherein the motor casing includes a receiving device, and
wherein the at least one damping element is received in the receiving device.

11. The hand-held power tool according to claim 10 , wherein the receiving device has a base cross section that is matched to the damping element and laterally projecting walls.

12. The hand-held power tool according to claim 10 , wherein the receiving device comprises a cavity into which the at least one damping element is inserted, and
wherein a cross section of the cavity is matched to a cross section of the at least one damping element.

13. The hand-held power tool according to claim 10 , wherein the receiving device receives the at least one damping element in a form-fitting manner both in a direction of a longitudinal axis of the drive motor and in a direction transverse to the longitudinal axis.

14. The hand-held power tool according to claim 8 , wherein the drive motor is retained within the machine casing exclusively by the damping elements.

15. The hand-held power tool according to claim 8 , wherein the at least one damping element has flat or curved surfaces, via which the at least one damping element contacts the motor casing and/or machine casing.

16. The hand-held power tool according to claim 15 , wherein the at least one damping element includes the curved surfaces, and
wherein the curved surfaces are in bearing contact with the motor casing and the machine casing.

17. The hand-held power tool according to claim 8 , wherein the at least one damping element is realized as a compact damping block.

18. The hand-held power tool according to claim 8 , wherein the at least one damping element is configured to transmit forces in a radial direction and in at least one of a direction of the longitudinal axis and a direction transverse to the longitudinal axis.

19. The hand-held power tool according to claim 8 , wherein the at least one damping element is composed of a rubber-elastic material.

20. The hand-held power tool according to claim 8 , wherein the machine casing is realized as a single piece that includes a handle, or, when in a fully assembled state, is formed from two casing half-shells which are joined together.

21. A hand-held power tool comprising:
a machine casing;
a drive motor retained in the machine casing, the drive motor including a motor casing and a plurality of damping elements, the plurality of damping elements being configured to reduce oscillations of the drive motor,
wherein the plurality of damping elements are disposed between the motor casing of the drive motor and the machine casing, the plurality of damping elements being distributed about a circumference of the motor casing,
wherein the plurality of damping elements constitute carrier elements which are configured to hold and support the drive motor in the machine casing, and
wherein the plurality of damping elements are realized as compact damping blocks, the damping blocks being held on a connecting carrier ring.

Assignees

• Christen Stefan
• Mathys Thomas
• Bosch Gmbh Robert

Inventors

• Christen Stefan
• Mathys Thomas

Classifications

• B25F5/006

  Vibration damping means · CPC title

• H02K7/145 Primary

  Hand-held machine tool · CPC title

• B24B41/007

  Weight compensation; Temperature compensation; Vibration damping · CPC title

• B24B23/04 Primary

  with oscillating grinding tools; Accessories therefor · CPC title

• H02K5/24

  specially adapted for suppression or reduction of noise or vibrations · CPC title