Dump truck

Patent metadata

Field	Value
Publication number	US-9643527-B2
Application number	US-201415122071-A
Country	US
Kind code	B2
Filing date	Feb 27, 2014
Priority date	Feb 27, 2014
Publication date	May 9, 2017
Grant date	May 9, 2017

Abstract

A suspension of a dump truck includes: an upper arm and a lower arm each having a proximal end supported on a vehicle body frame and configured to be up-and-down pivotally movable; a tire support in a form of a casing having an upper portion rotatably connected to a distal end of the upper arm and a lower portion rotatably connected to a distal end of the lower arm; and a suspension cylinder having an upper end rotatably connected to the vehicle body frame and a lower end rotatably connected to the upper arm, in which a king pin shaft connecting a rotation center of the upper arm and the casing with a rotation center of the lower arm and the casing intersects with an axial line of the suspension cylinder in the vicinity of a connecting portion of the upper arm and the casing.

First claim

The invention claimed is:

1. A dump truck comprising:
a vehicle body frame;
a suspension;
tires suspended from the vehicle body frame via the suspension and configured to travel the dump truck; and
a body supported by the vehicle body frame and configured to be raised and lowered,
the suspension comprising:
an upper arm and a lower arm each comprising a proximal end supported on the vehicle body frame and configured to be up-and-down pivotally movable; and
a tire support comprising an upper portion that is rotatably connected to a distal end of the upper arm and a lower portion that is rotatably connected to a distal end of the lower arm; and
a suspension cylinder comprising an upper end that is rotatably connected to the vehicle body frame and a lower end that is rotatably connected to the upper arm, wherein

a king pin shaft connecting a rotation center of the upper arm and the tire support with a rotation center of the lower arm and the tire support intersects with an axial line of the suspension cylinder in the vicinity of a connecting portion of the upper arm and the tire support.

2. The dump truck according to claim 1 , wherein
the king pin shaft intersects with the axial line of the suspension cylinder at the rotation center in the connecting portion of the upper arm and the tire support.

3. The dump truck according to claim 1 , wherein
the vehicle body frame comprises a vertical frame comprising a mount portion on which the body is mounted, and
the upper end of the suspension cylinder is rotatably supported by a suspension support provided to the vertical frame.

4. The dump truck according to claim 1 , wherein
the tires are configured to be driven by a driving unit attached to the vehicle body frame via a drive shaft.

5. A dump truck comprising:
a vehicle body frame;
a suspension;
tires suspended from the vehicle body frame via the suspension and configured to travel the dump truck; and
a body supported by the vehicle body frame and configured to be raised and lowered,
the suspension comprising:
an upper arm and a lower arm each comprising a proximal end supported on the vehicle body frame and configured to be up-and-down pivotally movable; and
a tire support comprising an upper portion that is rotatably connected to a distal end of the upper arm and a lower portion that is rotatably connected to a distal end of the lower arm; and
a suspension cylinder comprising an upper end that is rotatably connected to the vehicle body frame and a lower end that is rotatably connected to the upper arm, wherein

a king pin shaft connecting a rotation center of the upper arm and the tire support with a rotation center of the lower arm and the tire support intersects with an axial line of the suspension cylinder at a rotation center in a connecting portion of the upper arm and the tire support,
the vehicle body frame comprises a vertical frame comprising a mount portion on which the body is mounted,
the upper end of the suspension cylinder is rotatably supported by a suspension support provided to the vertical frame,
the lower end of the suspension cylinder is connected to the upper arm via a connecting bracket covering the connecting portion of the upper arm and the tire support, and
the tires are configured to be driven by an electric motor attached to the vehicle body frame via a drive shaft.

Assignees

• Komatsu Mfg Co Ltd

Inventors

• Uranaka Kyouji
• Okamoto Kouichi
• SASAKI Taiga

Classifications

• B60G3/20 Primary

  all arms being rigid · CPC title

• B60P1/16 Primary

  actuated by fluid-operated mechanisms · CPC title

• B60G7/005

  Ball joints (B60G7/006 takes precedence; for steering linkage B62D7/16; ball joints per se F16C11/06) · CPC title

• B60K17/30

  the ultimate propulsive elements, e.g. ground wheels, being steerable · CPC title

• B60K7/0007

  the motor being electric · CPC title