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Dane Technologies, Inc.
QuicKART 2000 Series
Service Manual
7105 Northland Terrace, Minneapolis, MN 55428 / 888-544-7779 / 763-544-7779 / Fax 763-544-4234
www.danetechnologies.com
970-011 Rev. 3/1/06
60
QK-2000 System Configuration
Service Bulletin — #985-001
November 1999
The QK-2000 machine is a powerful battery powered machine that uses remote control
to push shopping carts from the parking lot back to the store.
1. The QuicKART is driven by an
electric motor
through three (3) 12-volt batteries
connected in series (36 volts).
2) There is a single 8-inch
castered wheel
in back of the machine, which swivels
when the machine turns. This wheel is of solid rubber construction and rides on
journal roller bearings, which should be greased at least once a year.
3) The
drive axle
is one integrated assembly containing three (3) major
components: the DIFFERENTIAL AND AXLE HOUSING (output shafts), the
MOTOR, and the BRAKE ASSEMBLY. In general any one of these three
components can be replaced separately.
4) The
axle output shafts
are one-inch in diameter and are driven by a differential
gear box located near the center of the axle housing. The system is sealed with
lifetime lubrication.
5) The
drive motor
is rated at 36 volts D.C. and is capable of a peak of
approximately 2 horsepower. The motor is rated for continuous duty at 0.972
horsepower. The motor drives the axle shafts with ratio of 30.87:1.
6) A
brake
is located on the end of the motor, held in place with two 8/32 x 2.1 inch
long, cap screws. The brake assembly contains three major components:
a)
A micro-switch is mounted on the outside of the circular brake
housing which detects the position of the manual release arm. When the
machine is in normal operation, the switch is closed. When manual
release lever, lower right side of back plate, is pulled out, this switch will
open and electronics will shut down, preventing the machine from
operating without the braking feature. Note: Pulling this manual release
lever will keep the brake assembly from locking the motor, allowing the
operator to be able to push the machine manually while the QuicKART is
turned off. While pushing the QuicKART with the brake released, the
motor burns off generated voltage through occasional braking. This can
be avoided by pushing the QuicKART slowly.
b)
The brake is an electro-mechanical design. It consists of an
electro-magnet (63 ohms), a moving metal disk plus a fiber brake disk.
The fiber disk has a hexagon center which mates with a hexagon shaft on
the end of the motor. Two screws hold the brake assembly to the back
bell housing of the motor. This arrangement means the braking action is
through the differential gear box. With the lever in a counter clockwise
rotation, viewed from the end, the brake pad is pressed between a fixed
and movable plate in the brake housing. When 36 volts are applied to the
brake coil, the movable plate releases the brake pad and allows it to turn
with the motor. In the QK-2000, 36 volts is used to release the brake but
after a few seconds it drops to approximately 18 volts to reduce battery
consumption and heat generation.