Cutting mechanism for a lawnmower and/or a motor scythe, lawnmower and/or motor scythe and method for assembling a cutting mechanism and/or a lawnmower and/or a motor scythe

Patent metadata

Field	Value
Publication number	US-12114599-B2
Application number	US-202117215062-A
Country	US
Kind code	B2
Filing date	Mar 29, 2021
Priority date	Mar 30, 2020
Publication date	Oct 15, 2024
Grant date	Oct 15, 2024

Abstract

A cutting mechanism for a lawnmower and/or a motor scythe has at least one tool device, a tool connecting device, and a securing device. The tool device is designed for cutting grass. The tool connecting device is designed for rotation around a cutting mechanism rotation axis of the cutting mechanism. The tool connecting device and the tool device are designed to form a positive connection to one another in order to secure the positively connected tool device against being released from the tool connecting device radially in a radial direction with respect to the cutting mechanism rotation axis. The securing device and the tool connecting device are designed to be at least partially adjustable relative to one another in, or counter to, an at least partial radial direction at least section-by-section between an enable position for enabling production and/or release of the positive connection and a securing position for securing the positive connection against release.

First claim

What is claimed is:

1. A cutting mechanism for a lawnmower and/or a motor scythe, comprising:
at least one tool device, wherein the tool device is designed for cutting grass;
a tool connecting device, wherein the tool connecting device is designed for rotation around a cutting mechanism rotation axis of the cutting mechanism, and wherein the tool connecting device and the tool device are designed to form a positive connection to one another in order to secure the tool device, when positively connected, against being released from the tool connecting device radially in a radial direction with respect to the cutting mechanism rotation axis; and
a securing device, wherein the securing device and the tool connecting device are designed to be at least partially adjustable relative to one another for enabling establishment and/or release of the positive connection and a securing position for securing the positive connection against release,
wherein the securing device and the tool connecting device are designed to be at least partially adjustable relative to one another in an axial direction non-orthogonal with respect to the cutting mechanism rotation axis in a first adjusting section between the enable position and an intermediate position, and only in, or counter to, a radial direction in a second adjusting section, the second adjusting section being different from the first adjusting section, between the intermediate position and the securing position,
wherein the radial direction is orthogonal to a direction of the rotation around the cutting mechanism rotation axis.

2. The cutting mechanism according to claim 1 , wherein
the tool device or the tool connecting device has a pin,
the tool connecting device or the tool device has a pin receptacle,
the pin and the pin receptacle are designed for the pin to be received in the pin receptacle in a direction parallel to a pin longitudinal axis in order to form the positive connection, and
the pin longitudinal axis is non-orthogonal with respect to the cutting mechanism rotation axis.

3. The cutting mechanism according to claim 1 , wherein at least one of:
(i) the tool connecting device and the tool device are designed to form a positive connection to one another, at least in the securing position in order to secure the positively connected tool device against release from the tool connecting device in an axial direction non-orthogonal with respect to the cutting mechanism rotation axis,
(ii) the securing device and the tool device are designed to form a positive connection to one another in the securing position in order to secure the positively connected tool device against release from the securing device in an axial direction non-orthogonal with respect to the cutting mechanism rotation axis, or
(iii) the securing device and the tool connecting device are designed to form a positive connection to one another in the securing position in order to secure the securing device and the tool connecting device against release from one another in an axial direction non-orthogonal with respect to the cutting mechanism rotation axis.

4. The cutting mechanism according to claim 3 , wherein
the tool connecting device or the securing device has a cover disc,
the cover disc is designed for rotation around the cutting mechanism rotation axis and for covering the positive connection of the tool connecting device and the tool device to one another and/or of the securing device and the tool device to one another in an axial direction non-orthogonal with respect to the cutting mechanism rotation axis.

5. The cutting mechanism according to claim 4 , wherein
the cutting mechanism has a plurality of the tool devices, wherein the plurality of tool devices are designed for cutting grass;
the tool connecting device and the tool devices are designed to form positive connections to one another in order to secure the tool devices, when positively connected, against being released from the tool connecting device radially in different radial directions with respect to the cutting mechanism rotation axis; and
the securing device and the tool connecting device are designed to be at least partially adjustable relative to one another between the enable position for enabling the establishment and/or release of the positive connections and the securing position for securing the positive connections against release.

6. The cutting mechanism according to claim 5 , wherein
(i) the securing device and the tool connecting device are designed to be fully adjustable relative to one another in, or counter to, only a single radial direction, at least section-by-section, between the enable position and the securing position, or
(ii) the securing device and the tool connecting device are designed to be adjustable with a plurality of parts relative to one another in, or counter to, different radial directions, at least section-by-section, between the enable position and the securing position.

7. The cutting mechanism according to claim 6 , wherein
the securing device or the tool connecting device is designed for changing at least one dimension in a radial direction for adjustment, at least section-by-section, between the enable position and the securing position.

8. The cutting mechanism according to claim 7 , wherein
the dimension is a radius.

9. The cutting mechanism according to claim 7 , wherein
the securing device or the tool connecting device has an axial part and at least one radial part movably connected to the axial part,
the axial part is designed to be adjustable in an axial direction non-orthogonal with respect to the cutting mechanism rotation axis, and
the radial part is designed to be adjustable in an at least partial radial direction to change the dimension.

10. The cutting mechanism according to claim 9 , wherein
the securing device or the tool connecting device has at least one rotatable joint for adjustment at least section-by-section between the enable position and the securing position, and
the axial part and the radial part are connected in an adjustably movable manner via the at least one rotatable joint to change the dimension.

11. The cutting mechanism according to claim 9 , wherein at least one of:
(i) the cover disc and/or the axial part extends away from the cutting mechanism rotation axis in a radial direction, at least in the securing position, or
(ii) the cover disc and/or the axial part, completely surrounds the cutting mechanism rotation axis in a direction of rotation around the cutting mechanism rotation axis, at least in the securing position.

12. A cutting mechanism for a lawnmower and/or a motor scythe, comprising:
at least one tool device, wherein the tool device is designed for cutting grass;
a tool connecting device, wherein the tool connecting device is designed for rotation around a cutting mechanism rotation axis of the cutting mechanism, and wherein the tool connecting device and the tool device are designed to form a positive connection to one another in order to secure the tool device, when positively connected, against being released from the tool connecting device radially in a radial direction with respect to the cutting mechanism rotation axis; and
a securing device, wherein the securing device and the tool connecting device are designed to be at least partially adjustable relative to one another in, or counter to, an at least partial radial direction between an enable position for enabling establishment and/or release of the positive connection and a securing position for securing the positive connection against release, wherein
the radial direction is orthogonal to a direction of the rotat

Assignees

• Stihl Ag & Co Kg Andreas

Inventors

• Wolf Philip
• Gassner Markus
• Fiebig Marko

Classifications

• A01D34/736

  Flail type · CPC title

• A01D2101/00

  Lawn-mowers · CPC title

• A01D34/008

  for automated or remotely controlled operation · CPC title

• A01D34/82

  Other details · CPC title

• A01D34/733 Primary

  Cutting-blade mounting means · CPC title