Electric work machine

Patent metadata

Field	Value
Publication number	US-11839965-B2
Application number	US-202016935376-A
Country	US
Kind code	B2
Filing date	Jul 22, 2020
Priority date	Aug 30, 2019
Publication date	Dec 12, 2023
Grant date	Dec 12, 2023

Abstract

Breakage of a controller in an electric work machine and components around the controller is reduced. The electric work machine includes a motor, a trigger switch operated to activate the motor, a controller that controls the motor, a housing including a grip on which the trigger switch is located and a controller compartment accommodating the controller, and a deformation reducing member located at an interface between the grip and the controller compartment to reduce deformation of the housing.

First claim

What is claimed is:

1. An electric work machine, comprising:
a motor;
a trigger switch operated to activate the motor;
a controller configured to control the motor;
a housing including
a grip on which the trigger switch is located, and
a controller compartment accommodating the controller;

a deformation reducing member located at an interface between the grip and the controller compartment to reduce deformation of the housing; and
a controller case located in an internal space of the controller compartment and accommodating at least a part of the controller, wherein
the deformation reducing member is located above the controller case, and
the controller case includes
a bottom plate, and
a wall plate protruding upward from a rim of the bottom plate, and

the deformation reducing member is located at least partially above the wall plate.

2. The electric work machine according to claim 1 , wherein
the deformation reducing member is located in an internal space of the controller compartment and connected to an inner surface of the housing.

3. The electric work machine according to claim 2 , wherein
the controller compartment is connected to a lower end of the grip, and
the deformation reducing member is located above the controller.

4. The electric work machine according to claim 2 , further comprising:
a controller case located in an internal space of the controller compartment and accommodating at least a part of the controller,
wherein the deformation reducing member is located above the controller case.

5. The electric work machine according to claim 1 , wherein
the controller compartment is connected to a lower end of the grip, and
the deformation reducing member is located above the controller.

6. The electric work machine according to claim 1 , wherein
the wall plate includes
a left wall plate protruding upward from a left end of the bottom plate, and
a right wall plate protruding upward from a right end of the bottom plate, and

the deformation reducing member has a left end located above the left wall plate and a right end located above the right wall plate.

7. The electric work machine according to claim 1 , further comprising:
a buffer layer located between the deformation reducing member and an upper end of the wall plate.

8. The electric work machine according to claim 7 , wherein
the buffer layer includes at least a part of the controller compartment.

9. The electric work machine according to claim 1 , wherein
the controller compartment has larger dimensions than the grip in a front-rear direction and a lateral direction, and
the deformation reducing member has a larger dimension than the grip in the lateral direction.

10. The electric work machine according to claim 1 , wherein
the deformation reducing member has higher rigidity than the housing.

11. The electric work machine according to claim 1 , wherein
the deformation reducing member comprises metal or carbon.

12. An electric work machine, comprising:
a motor;
a trigger switch operated to activate the motor;
a controller configured to control the motor;
a housing including
a grip on which the trigger switch is located, and
a controller compartment accommodating the controller;

a deformation reducing member located at an interface between the grip and the controller compartment to reduce deformation of the housing; and
an operation panel operated to change a control mode of the motor, wherein
the controller compartment has an opening receiving the operation panel, and
the deformation reducing member is located on at least a periphery of the opening.

13. The electric work machine according to claim 12 , wherein
the opening is located frontward from the interface, and
the deformation reducing member is located at least partially between the interface and the opening in a front-rear direction.

14. The electric work machine according to claim 12 , wherein
the deformation reducing member is fixed to the operation panel.

15. The electric work machine according to claim 14 , further comprising:
a connection portion comprising a synthetic resin and connecting the deformation reducing member to the operation panel,
wherein the connection portion is integral with the operation panel, and
the deformation reducing member is fixed to the connection portion.

16. An electric work machine, comprising:
a motor;
a controller configured to control the motor;
a housing including a controller compartment accommodating the controller;
an operation panel located in an opening in the controller compartment; and
a deformation reducing member fixed to the operation panel to reduce deformation of the housing.

17. The electric work machine according to claim 16 , further comprising:
a connection portion comprising a synthetic resin and connecting the deformation reducing member to the operation panel,
wherein the connection portion is integral with the operation panel, and
the deformation reducing member is fixed to the connection portion.

18. The electric work machine according to claim 16 , wherein
the deformation reducing member comprises metal or carbon.

Assignees

• Makita Corp

Inventors

• Kawai Yasuhito

Classifications

• B25F5/02 Primary

  Construction of casings, bodies or handles {(B25F5/006, B25F5/008 take precedence)} · CPC title

• H02K7/145 Primary

  Hand-held machine tool · CPC title

• H02K11/28

  Manual switches · CPC title

• H02K11/33

  Drive circuits, e.g. power electronics (H02K11/38 takes precedence) · CPC title

• B25B21/02

  with means for imparting impact to screwdriver blade or nut socket · CPC title