Battery powered work machine, and battery powered forklift

• US 9,550,659 B2
• Filed: 01/08/2013
• Issued: 01/24/2017
• Est. Priority Date: 01/08/2013
• Status: Expired due to Fees

• Current Assignee: Komatsu Ltd.
• Original Assignee: Komatsu Ltd.
• Inventors: Nakazawa, Norikazu, Nishiyama, Kouji
• Primary Examiner(s): Rivera, William A
• Assistant Examiner(s): Kruer, Stefan
• Application Number:
  US13/990,514
• Publication Number:
  US 20150375977A1
• Time in Patent Office: 1,477 Days
• US Class Current: 1/1
• CPC Class Codes: B60K 1/00 Arrangement or mounting of electrical propulsion units B60K7/00 takes precedence; arrangement or mounting of plural diverse prime-movers for mutual or common propulsion B60K6/00; electric transmission arrangements B60K17/12; electric equipment or propulsion of electrically-propelled vehicles per se B60L; current-collectors for power supply lines of electrically-propelled vehicles B60L5/00
• CPC Class Codes: B60K 1/04 of the electric storage means for propulsion exchanging batteries for electric propulsion of vehicles B60L53/80; for auxiliary purposes only B60R16/04; supplying batteries to, or removing batteries from, vehicles B60S5/06
• CPC Class Codes: B60K 2001/003 with means for cooling the electrical propulsion units
• CPC Class Codes: B60K 2001/0416 Arrangement in the rear part of the vehicle
• CPC Class Codes: B60L 50/60 using power supplied by batteries in combination with fuel cells B60L50/75
• CPC Class Codes: B60L 53/00 Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
• CPC Class Codes: B60L 53/53 Batteries
• CPC Class Codes: B60Y 2200/62 Conveyors, floor conveyors
• CPC Class Codes: B66F 9/07 Floor-to-roof stacking devices, e.g. "stacker cranes", "retrievers"
• CPC Class Codes: B66F 9/07504 Accessories, e.g. for towing, charging, locking
• CPC Class Codes: B66F 9/07531 Battery compartments
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries
• CPC Class Codes: Y02T 10/7072 Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
• CPC Class Codes: Y02T 90/12 Electric charging stations
• CPC Class Codes: Y02T 90/14 Plug-in electric vehicles

Abstract

A battery-powered work machine driven with a battery, includes: a body including a bottom and a pair of sides erecting from the bottom and including a first side and a second side; a control device of the work machine mounted on the bottom; a first fuse for a driving control device and a second fuse for a cargo-handling device, provided closer to the first side than the second side; a charging device for the battery, the charging device being mounted on the bottom; and a third fuse for the charging device, provided closer to the second side than the first side.

Claims

1. A battery-powered work machine driven with a battery, the work machine comprising:

a body including a bottom, a battery setting surface on which the battery is mounted, the battery setting surface placed above the bottom, and a pair of sides erecting from the bottom and including a first side and a second side;

a control device of the work machine mounted on the bottom on a side adjacent to the first side, the control device including a driving control device and a cargo-handling control device;

a first fuse for the driving control device, and a second fuse for the cargo-handling control device, the first fuse and the second fuse being provided closer to the first side than the second side;

a charging device for the battery, the charging device being mounted on the bottom on a side adjacent to the second side; and

a third fuse for the charging device, the third fuse being provided closer to the second side than the first side; and

a storage space that is formed in the body, below a bottom of the battery, and above the bottom of the body, and in which the driving control device is stored, the first fuse for the driving control device, the cargo-handling control device, the second fuse for the cargo-handling device, the charging device, and the third fuse for the charging device in which the first side and the second side are erected on both sides in a widthwise direction of the body, wherein

the first side is a partition wall on one of right and left sides of the body, and the second side is a partition wall on the other one of the right and left sides of the body.

2. The battery-powered work machine according to claim 1, wherein

the first side includes a first opening in communication with the first fuse for the driving control device, and a second fuse for the cargo-handling control device, and

the second side includes a second opening in communication with the third fuse for the charging device.

3. A battery-powered forklift including a fork mounted on a front of a body to which a front wheel and a rear wheel are attached, a counterweight provided on a rear of the body, wherein the body travels by a driving electric motor, the forklift comprising:

a battery mounted on a battery setting surface placed above the bottom of the body, and the battery being mounted above the rear wheel;

a storage space that is formed in the body, below a bottom of the battery, and above the bottom of the body, and in which a pair of sides are erected from both sides of the bottom of the body, the pair of sides including a first side and a second side, in a widthwise direction of the body;

a cargo-handling electric motor that is stored in the storage space for allowing operating oil, which operates the fork, to generate oil pressure;

a control device mounted in the storage space on a side adjacent to the first side, the control device including a driving control device to control the driving electric motor and a cargo-handling control device to control the cargo-handling electric motor;

a first fuse for the driving control device, and a second fuse for the cargo-handling control device, the first fuse and the second fuse being stored in the storage space, and are provided closer to the first side than the second side;

a charging device mounted on a side adjacent to the second side in the storage space for charging the battery;

a third fuse for the charging device, the third fuse being stored in the storage space, and provided closer to the second side than the first side; and

an operating oil tank for holding the operating oil, wherein said operating oil tank is stored in the storage space,

wherein the first side is a partition wall on one of right and left sides of the body, and the second side is a partition wall on the other one of the right and left sides of the body.

4. The battery-powered forklift according to claim 3, wherein

the first side includes a first opening in communication with the first fuse for the driving control device, and a second fuse for the cargo-handling control device, and

the second side includes a second opening in communication with the third fuse for the charging device.

5. The battery-powered forklift according to claim 3, further comprising a fan that exhausts air from the storage space to an outside.