Electrically driven industrial vehicle

• US 7,900,722 B2
• Filed: 03/09/2007
• Issued: 03/08/2011
• Est. Priority Date: 04/12/2006
• Status: Active Grant

• Current Assignee: Takeuchi Mfg. Co.Ltd
• Original Assignee: Takeuchi Mfg. Co.Ltd
• Inventors: Yoshioka, Masao, Shimada, Yoshihide, Yamazaki, Yutaka
• Primary Examiner(s): Morris; Lesley
• Assistant Examiner(s): Stabley; Michael R
• Application Number:
  US12/294,471
• Publication Number:
  US 20100224426A1
• Time in Patent Office: 1,460 Days
• Field of Search: 180/6.48, 180/6.7
• US Class Current: 180/6.48
• CPC Class Codes: E02F 3/3414 the arms being pivoted at the rear of the vehicle chassis, e.g. skid steer loader
• CPC Class Codes: E02F 9/0858 Arrangement of component parts installed on superstructures not otherwise provided for, e.g. electric components, fenders, air-conditioning units E02F9/16, E02F9/18 take precedence
• CPC Class Codes: E02F 9/207 of the type electric propulsion units, e.g. electric motors or generators
• CPC Class Codes: E02F 9/2079 Control of mechanical transmission for hydrostatic transmission or hydraulic torque converter E02F9/2253

Abstract

A shovel loader (1) has a vehicle body frame (9), a travel device (5), a loader device (20), and a drive power generation section for generating drive power for making the travel device (5) travel. The vehicle body frame (9) has a pair of side frames (9a, 9a) arranged on both the left and right sides of the shovel loader (1). The loader device (20) is made up of a pair of lift arms (21,21) vertically swingably attached to the pair of side frames (9a, 9a) and of a bucket (29) vertically swingably attached to the forward end of the pair of lift arms (21,21). The drive power generation section has a pair of electric motors (71,71) for individually transmitting drive power to the pair of travel devices (5,5) and capable of being controlled independent of each other so that a vehicle (10) can be made to travel in a manner the left and right are independent of each other, and also has a battery (50) for supplying electric power to the electric motors (71,71).

Claims

1. An industrial vehicle, comprising:

a vehicle body frame;

a travel member installed on the vehicle body frame;

a work device installed on the vehicle body frame; and

a drive power generation section that is provided in the vehicle body frame and that generates drive power to cause the travel member to travel, wherein

the vehicle body frame has a pair of side frames provided on the left and right sides of the industrial vehicle,

the work device comprises a pair of lift arms vertically swingably installed on the pair of side frames at their base ends, and a bucket vertically swingably installed on the front ends of the pair of lift arms,

the drive power generation section comprises an electric motor that causes the travel member to travel by transmitting drive power to the travel member, and a battery or a large capacity condenser or a combination of a battery and a large capacity condenser that supplies electric power to the electric motor, the battery being housed in a battery storage part formed in a planar shape below a floor surface of the vehicle body frame, and a battery housing aperture that opens to the battery storage part is formed in the rear surface of the vehicle body frame, and the battery is inserted and removed through the battery storage aperture.

2. The industrial vehicle according to claim 1, wherein the travel member comprises a pair of travel members provided on the left and right of the vehicle body frame, the electric motor is provided in the drive power generation section as a pair of left and right electric motors, and by independently controlling the drive of the pair of electric motors, the drive power can be individually transmitted to the pair of travel members and the pair of travel members can travel independently.

3. The industrial vehicle according to claim 1, wherein the battery is a lithium ion battery or an organic radical battery.