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Patent Searching and Data


Title:
DUMP TRUCK
Document Type and Number:
WIPO Patent Application WO/2012/172826
Kind Code:
A1
Abstract:
A dump truck equipped with an oil-cooled center brake (11), a first hydraulic pump (51) for supplying oil coolant to the center brake (11), a second hydraulic pump (52) that supplies oil coolant to the center brake (11) in addition to the oil coolant from the first hydraulic pump (51), a hydraulic motor (54) that drives the second hydraulic pump (52), a third hydraulic pump (53) that supplies hydraulic fluid to the hydraulic motor (54), an open/close valve (55) that causes the hydraulic fluid to bypass the hydraulic motor (54), and a control device (57) that controls the amount of bypass flow through the open/close valve (55). The capacity of the first hydraulic pump (51) corresponds to the amount of flow of oil coolant necessary for lubricating the transmission (6). The capacity of the second hydraulic pump (52) corresponds to the amount of flow to supplement the oil coolant from the first hydraulic pump (51) when the brake is off. The capacity of the third hydraulic pump (53) is smaller than the capacity of the second hydraulic pump (52).

Inventors:
FUDOUJI Takashi (163-46 Nagasuna, Hitachinaka-sh, Ibaraki 04, 〒3120004, JP)
Application Number:
JP2012/052232
Publication Date:
December 20, 2012
Filing Date:
February 01, 2012
Export Citation:
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Assignee:
KOMATSU LTD. (2-3-6, Akasaka Minato-k, Tokyo 14, 〒1078414, JP)
株式会社小松製作所 (〒14 東京都港区赤坂2丁目3番6号 Tokyo, 〒1078414, JP)
International Classes:
F16D65/853; B60T5/00; B60T10/00
Foreign References:
JPS5587639A
JPS5972160U
JPS63305044A
JPH02144249A
JPH0379464A
JPH0471829U
Other References:
See also references of EP 2557333A4
Attorney, Agent or Firm:
KINOSHITA & ASSOCIATES (3rd floor, Ogikubo TM building 26-13, Ogikubo 5-chome, Suginami-k, Tokyo 51, 〒1670051, JP)
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Claims: