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US 12,614,955 B2Granted
Electric work machine
AssigneeMakita Corporation
InventorsTsubasa Yagi, Hidekazu Suda, Shunpei Yamaji
Life of this patent
Estimating the term…
Abstract
An electric work machine includes a motor, a circuit board, a case, at least one elastic member, and a filler. The circuit board includes a heat generating element mounted thereon, and the heat generating element generates heat due to the motor being driven. The case includes a heat dissipation part thermally coupled to the heat generating element and houses the circuit board therein. The at least one elastic member is placed between the circuit board and the case, and is housed inside the case. The filler is filled inside the case and fixes the circuit board and the at least one elastic member inside the case.
Claims17
An electric work machine comprising:
- a motor;
- a circuit board including an electric/electronic component thereon, the electric/electronic component being configured to generate heat due to the motor being driven;
- a case (i) including a heat dissipation part and (ii) housing the circuit board therein, the heat dissipation part being (i) thermally coupled to the electric/electronic component and (ii) configured to dissipate the heat generated in the electric/electronic component;
- at least one elastic member (i) between the circuit board and the case and (ii) including an adhesive agent or sponge;
- and
- a filler (i) filled in the case and (ii) that fixes the circuit board and the at least one elastic member to the case.
3 more elements
An electric work machine comprising:
- a motor;
- a circuit board including an electric/electronic component thereon, the electric/electronic component being configured to generate heat due to the motor being driven;
- a case (i) including a heat dissipation part and (ii) housing the circuit board therein, the heat dissipation part being (i) thermally coupled to the electric/electronic component and (ii) configured to dissipate the heat generated in the electric/electronic component;
- at least one elastic member between the circuit board and the case;
- and
- a filler (i) filled in the case and (ii) that fixes the circuit board and the at least one elastic member to the case, wherein:
- the circuit board (i) has a shape of a rectangle and (ii) includes first through fourth side edges forming the rectangle, the first side edge being opposed to the second side edge;
- the case includes first and second side walls;
- the at least one elastic member includes:
- a first elastic member between the first side edge and the first side wall;
- and
- a second elastic member (i) between the second side edge and the second side wall and (ii) opposed to the first elastic member;
- and
- the electric/electronic component is between the first elastic member and the second elastic member.
11 more elements
An electric work machine comprising:
- a motor;
- a circuit board including an electric/electronic component thereon, the electric/electronic component being configured to generate heat due to the motor being driven;
- a case (i) including a heat dissipation part and (ii) housing the circuit board therein, the heat dissipation part being (i) thermally coupled to the electric/electronic component and (ii) configured to dissipate the heat generated in the electric/electronic component;
- at least one elastic member between the circuit board and the case;
- and
- a filler (i) filled in the case and (ii) that fixes the circuit board and the at least one elastic member to the case, wherein:
- the circuit board includes:
- at least one side edge;
- a first surface;
- and
- a second surface corresponding to a reverse side of the first surface;
- the case includes:
- at least one side wall covering the at least one side edge;
- and
- an inner surface facing the second surface;
- and
- the at least one elastic member (i) fills a gap between the at least one side edge and the at least one side wall and (ii) is closer to the inner surface with respect to the first surface.
14 more elements
An electric work machine comprising:
- a motor;
- a circuit board including an electric/electronic component thereon, the electric/electronic component being configured to generate heat due to the motor being driven;
- a case (i) including a heat dissipation part and (ii) housing the circuit board therein, the heat dissipation part being (i) thermally coupled to the electric/electronic component and (ii) configured to dissipate the heat generated in the electric/electronic component;
- at least one elastic member between the circuit board and the case;
- and
- a filler (i) filled in the case and (ii) that fixes the circuit board and the at least one elastic member to the case, wherein:
- the circuit board includes at least one side edge;
- the case includes at least one side wall covering the at least one side edge;
- the at least one elastic member is between the at least one side edge and the at least one side wall;
- and
- the filler is (i) between the at least one elastic member and the at least one side wall and/or (ii) between the at least one elastic member and the at least one side edge.
8 more elements
An electric working machine comprising:
- a motor;
- a circuit board including an electric/electronic component thereon, the electric/electronic component being configured to generate heat due to the motor being driven;
- a case (i) including a heat dissipation part and (ii) housing the circuit board therein, the heat dissipation part being (i) thermally coupled to the electric/electronic component and (ii) configured to dissipate the heat generated in the electric/electronic component;
- at least one elastic member between the circuit board and the case;
- and
- a filler (i) filled in the case and (ii) that fixes the circuit board and the at least one elastic member to the case, wherein:
- the circuit board includes:
- a first surface;
- and
- a second surface corresponding to a reverse side of the first surface;
- the case includes an inner surface facing the second surface;
- and
- the at least one elastic member is between the second surface and the inner surface.
10 more elements
An electric work machine comprising:
- a motor;
- a circuit board including an electric/electronic component thereon, the electric/electronic component being configured to generate heat due to the motor being driven;
- a case (i) including a heat dissipation part and (ii) housing the circuit board therein, the heat dissipation part being (i) thermally coupled to the electric/electronic component and (ii) configured to dissipate the heat generated in the electric/electronic component;
- at least one elastic member between the circuit board and the case;
- and
- a urethane resin (i) filled in the case and (ii) that fixes the circuit board and the at least one elastic member to the case.
3 more elements
Dependencies are inferred from the claim text.