Hand-held power tool drive device

Patent metadata

Field	Value
Publication number	US-9833850-B2
Application number	US-201414317804-A
Country	US
Kind code	B2
Filing date	Jun 27, 2014
Priority date	Jun 28, 2013
Publication date	Dec 5, 2017
Grant date	Dec 5, 2017

Abstract

A hand-held power tool drive device includes at least one wobble drive unit that has at least one rotatably mounted drive element, with at least one wobble unit positioned on the at least one drive element. The drive device also includes at least one counterweight unit that has at least one movably mounted compensating element configured to be driven by the at least one wobble unit. The at least one wobble unit includes at least one force application point that is configured to drive the at least one compensating element. An axis extending through a rotational axis of the at least one drive element and the at least one force application point encloses an angle of between 0° and 135° with a wobble element longitudinal axis of a wobble element of the at least one wobble unit.

First claim

What is claimed is:

1. A hand-held power tool drive device, comprising:
at least one wobble drive unit including
at least one rotatably mounted drive element defining a rotational axis, and
at least one wobble unit positioned on the at least one drive element, the at least one wobble unit having
a wobble plate mounted on the at least one rotatably mounted drive element,
at least one force application point, and
a wobble element extending from the wobble plate and defining a longitudinal axis; and

at least one counterweight unit including
at least one bearing pin receiving structure,
at least one movably mounted compensating element extending from the bearing pin receiving structure away from the rotational axis along the longitudinal axis, and
a joining element extending from the at least one bearing pin receiving structure towards the rotational axis along the longitudinal axis and connected to the at least one wobble unit at the at least one force application point,

wherein the at least one force application point is configured to drive the at least one counterweight unit, such that the at least one movably mounted compensating element is pivoted about a pivot axis extending through the at least one bearing pin receiving structure,
wherein a first axis, extending through the rotational axis of the at least one drive element and the at least one force application point, forms an angle of 0° to 135° with the longitudinal axis of the wobble element,
wherein the at least one movably mounted compensating element extends through the longitudinal axis along the pivot axis, and
wherein the at least one bearing pin receiving structure is located between the at least one movably mounted compensating element and the at least one force application point along the longitudinal axis.

2. The hand-held power tool drive device according to claim 1 , wherein:
a plane is perpendicular to the longitudinal axis,
the rotational axis is located in the plane, and
the at least one force application point is spaced apart from the plane.

3. The hand-held power tool drive device according to claim 2 , wherein the at least one force application point is located between an output end of the wobble element and the rotational axis along the longitudinal axis.

4. The hand-held power tool drive device according to claim 1 , wherein the at least one wobble unit further includes a further wobble element, and the at least one force application point is located on the further wobble element.

5. The hand-held power tool drive device according to claim 1 , wherein:
the at least one counterweight unit further includes at least one movably mounted actuating element configured to move the at least one compensating element; and
the pivot axis is located between an output end of the wobble element and the at least one force application point along the longitudinal axis.

6. The hand-held power tool drive device according to claim 1 , wherein the joining element is a ball cup.

7. The hand-held power tool drive device according to claim 1 , wherein the joining element is a fork adapter.

8. The hand-held power tool drive device according to claim 1 , wherein the joining element is configured to receive a conical pin or a spherical pin of the at least one wobble drive unit.

9. The hand-held power tool drive device according to claim 8 , wherein the first axis forms an angle of 90° with the longitudinal axis.

10. The hand-held power tool drive device according to claim 1 , wherein:
a plane is perpendicular to the longitudinal axis,
the rotational axis is located in the plane,
the at least one wobble unit further includes at least one further wobble element positioned such that the at least one further wobble element is spaced apart from the plane, and
the at least one force application point is located on the at least one further wobble element.

11. A hand-held power tool comprising:
a housing; and
at least one hand-held power tool drive device including
at least one wobble drive unit having
at least one rotatably mounted drive element defining a rotational axis, and
at least one wobble unit positioned on the at least one drive element, the at least one wobble unit having
a wobble plate mounted on the at least one rotatably mounted drive element,
at least one force application point, and
a wobble element extending from the wobble plate and defining a longitudinal axis;

a bearing pin received by the housing; and
at least one counterweight unit including
at least one bearing pin receiving structure configured to receive the bearing pin, to mount pivotally the at least one counterweight unit on the housing,
at least one movably mounted compensating element extending from the bearing pin receiving structure away from the rotational axis along the longitudinal axis, and
a joining element extending from the at least one bearing pin receiving structure towards the rotational axis along the longitudinal axis and connected to the at least one wobble drive unit at the at least one force application point,

wherein the at least one force application point is configured to drive the at least one counterweight unit, such that the at least one movably mounted compensating element is pivoted about a pivot axis extending through the at least one bearing pin receiving structure and the bearing pin,
wherein a first axis, extending through the rotational axis of the at least one drive element and the at least one force application point, forms an angle of 0° to 135° with the longitudinal axis of the wobble element,
wherein the at least one movably mounted compensating element extends through the longitudinal axis along the pivot axis, and
wherein the at least one bearing pin receiving structure is located between the at least one movably mounted compensating element and the at least one force application point along the longitudinal axis.

Assignees

• Bosch Gmbh Robert

Inventors

• Schmid Hardy

Classifications

• B25F5/001

  Gearings, speed selectors, clutches or the like specially adapted for rotary tools · CPC title

• B25D2217/0088

  being mechanically-driven · CPC title

• B25D17/24

  Damping the reaction force {(resiliently mounted handles B25D17/043; dampers in connections of hammers to backhoes E02F3/966)} · CPC title

• B23D51/16 Primary

  of drives or feed mechanisms for straight tools, e.g. saw blades, or bows · CPC title

• B25D11/062 Primary

  comprising a wobbling mechanism, swash plate · CPC title