Transmission device

Patent metadata

Field	Value
Publication number	US-10525541-B2
Application number	US-201615377161-A
Country	US
Kind code	B2
Filing date	Dec 13, 2016
Priority date	Dec 16, 2015
Publication date	Jan 7, 2020
Grant date	Jan 7, 2020

Abstract

A transmission device is configured to generate at least one of a stroke motion and a reciprocating motion of an insert tool of a hand-held power tool, and includes at least one link unit configured to generate the stroke motion. The link unit includes at least one output element, at least one link element, at least one contact surface, and at least one further contact surface. The at least one contact surface is disposed at least partially on the at least one output element. The at least one link element is configured to act in combination with the at least one output element via the at least one contact surface. The at least one further contact surface is configured to generate a force that initiates the reciprocating motion, and is disposed at least partially on the at least one output element.

First claim

What is claimed is:

1. A transmission device, the transmission device configured to generate a stroke motion and a reciprocating motion of an insert tool of a hand-held power tool, the transmission device comprising:
at least one link unit that includes:
at least one output element arranged on a gear;
at least one first contact surface that is disposed at least partially on the at least one output element;
at least one link element that is configured to act in combination with the at least one output element via the at least one first contact surface to produce the stroke motion in a stroke direction; and
at least one second contact surface that is disposed at least partially on the at least one output element, and that is configured to generate a force component to initialize the reciprocating motion in a reciprocating direction that is different from the stroke direction.

2. The transmission device of claim 1 , wherein the link unit further includes:
at least one rotatably mounted rolling element that at least partially defines the at least one second contact surface.

3. The transmission device of claim 2 , wherein the at least one output element defines a longitudinal direction that is perpendicular to the stroke direction and parallel to the reciprocating direction, and the at least one rolling element is mounted so as to be rotatable about an axis that is perpendicular to the longitudinal direction of the at least one output element.

4. The transmission device of claim 2 , wherein the at least one rolling element includes a ball bush.

5. The transmission device of claim 1 , further comprising:
at least one bearing element configured to support the at least one link element; and
at least one third contact surface that is configured to contact the at least one second contact surface in at least one operating mode, and that is disposed on the at least one bearing element.

6. The transmission device of claim 5 , wherein the at least one third contact surface is inclined about at least one axis extending in a plane having a surface normal disposed parallel to a longitudinal direction of the at least one output element, and extending obliquely in relation to the stroke direction.

7. The transmission device of claim 5 , further comprising:
at least one contact element that at least partially defines the at least one third contact surface, and that is disposed on the at least one bearing element.

8. The transmission device of claim 5 , further comprising:
at least one setting unit that is operable to switch over between at least two driving modes at least partially via displacement of the at least one bearing element relative to the at least one output element.

9. The transmission device of claim 5 , further comprising:
at least one spring element configured to apply a force to the at least one bearing element in at least one direction parallel to a longitudinal direction of the at least one output element.

10. A hand-held power tool, comprising:
a transmission device that is configured to generate a stroke motion and a reciprocating motion of an insert tool for the hand-held power tool, and that includes:
at least one link unit that has:
at least one output element arranged on a gear;
at least one first contact surface that is disposed at least partially on the at least one output element;
at least one link element that is configured to act in combination with the at least one output element via the at least one first contact surface to produce the stroke motion in a stroke direction; and
at least one second contact surface that is disposed at least partially on the at least one output element, and that is configured to generate a force component to initialize the reciprocating motion in a reciprocating direction that is different from the stroke direction.

11. A method of generating motion of an insert tool of a hand-held power tool, the method comprising:
generating a stroke motion in a stroke direction via at least one first contact surface that is disposed on at least one output element of at least one link unit of a transmission device, the link unit further including at least one link element that is configured to act in combination with the at least one output element via the at least one first contact surface; and
generating a reciprocating motion in a reciprocating direction that is different from the stroke direction via at least one second contact surface that is disposed on the at least one output element;

wherein the at least one output element is arranged on a gear.

Assignees

• Bosch Gmbh Robert

Inventors

• Saegesser Daniel
• Laett Michael

Classifications

• B23D49/165

  with means to move the saw blades in an orbital path · CPC title

• B23D49/162

  Pad sawing devices · CPC title

• B25F3/00 Primary

  Associations of tools for different working operations with one portable power-drive means; Adapters therefor · CPC title

• F16H37/122

  for interconverting rotary motion and oscillating motion · CPC title

• F16H25/14

  with reciprocation perpendicular to the axis of rotation (crank or eccentric gearings without swinging connecting-rod F16H21/36) · CPC title