Title:
HST TRAVELING SYSTEM OF WORK MACHINE
Document Type and Number:
WIPO Patent Application WO/2006/098179
Kind Code:
A1
Abstract:
An HST traveling system of a work machine capable of eliminating the need of a transmission and a propeller shaft, capable of traveling the work machine from a low speed to a high speed, and enabling the simplification of circuit configuration. A controller (31) calculates the target tilt amounts of hydraulic motors (10) and (20) by referring a vehicle body traveling speed (vehicle speed) obtained from signals detected by a rotation detector (20c) to control characteristics and controls tilt amount control means (10b) and (20b) of the hydraulic motors (10) and (20) and a clutch (15). Also, the controller changes over a traveling mode from a set speed to a low speed four-wheel drive for driving both of traveling devices (12) and (22) or a high speed two-wheel drive for driving only the traveling device (22) on the rear wheel side by zeroing the capacity of the hydraulic motor (10) on the front wheel side.
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Inventors:
Udagawa, Tsutomu c/o Hitachi Construction Machinery Co. Ltd. (Tsuchiura Works, Intellectual Property
Department, 650, Kandatsumachi, Tsuchiura-sh, Ibaraki 13, 30000, JP)
Egawa, Eiji c/o Hitachi Construction Machinery Co. Ltd. (Tsuchiura Works, Intellectual Property Department, 650, Kandatsumachi, Tsuchiura-sh, Ibaraki 13, 30000, JP)
Nakayama, Akira c/o Hitachi Construction Machinery Co. Ltd. (Tsuchiura Works, Intellectual Property Department, 650, Kandatsumachi, Tsuchiura-sh, Ibaraki 13, 30000, JP)
Takiguchi, Kazuo c/o Hitachi Construction Machinery Co. Ltd. (Tsuchiura Works, Intellectual Property Department, 650, Kandatsumachi, Tsuchiura-sh, Ibaraki 13, 30000, JP)
Toyooka, Tsukasa c/o Hitachi Construction Machinery Co. Ltd. (Tsuchiura Works, Intellectual Property Department, 650, Kandatsumachi, Tsuchiura-sh, Ibaraki 13, 30000, JP)
Sugaya, Makoto c/o Hitachi Construction Machinery Co. Ltd. (Tsuchiura Works, Intellectual Property Department, 650, Kandatsumachi, Tsuchiura-sh, Ibaraki 13, 30000, JP)
Sato, Kensuke c/o Hitachi Construction Machinery Co. Ltd. (Tsuchiura Works, Intellectual Property Department, 650, Kandatsumachi, Tsuchiura-sh, Ibaraki 13, 30000, JP)
Egawa, Eiji c/o Hitachi Construction Machinery Co. Ltd. (Tsuchiura Works, Intellectual Property Department, 650, Kandatsumachi, Tsuchiura-sh, Ibaraki 13, 30000, JP)
Nakayama, Akira c/o Hitachi Construction Machinery Co. Ltd. (Tsuchiura Works, Intellectual Property Department, 650, Kandatsumachi, Tsuchiura-sh, Ibaraki 13, 30000, JP)
Takiguchi, Kazuo c/o Hitachi Construction Machinery Co. Ltd. (Tsuchiura Works, Intellectual Property Department, 650, Kandatsumachi, Tsuchiura-sh, Ibaraki 13, 30000, JP)
Toyooka, Tsukasa c/o Hitachi Construction Machinery Co. Ltd. (Tsuchiura Works, Intellectual Property Department, 650, Kandatsumachi, Tsuchiura-sh, Ibaraki 13, 30000, JP)
Sugaya, Makoto c/o Hitachi Construction Machinery Co. Ltd. (Tsuchiura Works, Intellectual Property Department, 650, Kandatsumachi, Tsuchiura-sh, Ibaraki 13, 30000, JP)
Sato, Kensuke c/o Hitachi Construction Machinery Co. Ltd. (Tsuchiura Works, Intellectual Property Department, 650, Kandatsumachi, Tsuchiura-sh, Ibaraki 13, 30000, JP)
Application Number:
PCT/JP2006/304265
Publication Date:
September 21, 2006
Filing Date:
March 06, 2006
Export Citation:
Assignee:
HITACHI CONSTRUCTION MACHINERY CO., LTD. (5-1 Koraku 2-chome, Bunkyo-ku Tokyo, 04, 11200, JP)
Udagawa, Tsutomu c/o Hitachi Construction Machinery Co. Ltd. (Tsuchiura Works, Intellectual Property Department, 650, Kandatsumachi, Tsuchiura-sh, Ibaraki 13, 30000, JP)
Egawa, Eiji c/o Hitachi Construction Machinery Co. Ltd. (Tsuchiura Works, Intellectual Property Department, 650, Kandatsumachi, Tsuchiura-sh, Ibaraki 13, 30000, JP)
Nakayama, Akira c/o Hitachi Construction Machinery Co. Ltd. (Tsuchiura Works, Intellectual Property Department, 650, Kandatsumachi, Tsuchiura-sh, Ibaraki 13, 30000, JP)
Takiguchi, Kazuo c/o Hitachi Construction Machinery Co. Ltd. (Tsuchiura Works, Intellectual Property Department, 650, Kandatsumachi, Tsuchiura-sh, Ibaraki 13, 30000, JP)
Toyooka, Tsukasa c/o Hitachi Construction Machinery Co. Ltd. (Tsuchiura Works, Intellectual Property Department, 650, Kandatsumachi, Tsuchiura-sh, Ibaraki 13, 30000, JP)
Sugaya, Makoto c/o Hitachi Construction Machinery Co. Ltd. (Tsuchiura Works, Intellectual Property Department, 650, Kandatsumachi, Tsuchiura-sh, Ibaraki 13, 30000, JP)
Sato, Kensuke c/o Hitachi Construction Machinery Co. Ltd. (Tsuchiura Works, Intellectual Property Department, 650, Kandatsumachi, Tsuchiura-sh, Ibaraki 13, 30000, JP)
Udagawa, Tsutomu c/o Hitachi Construction Machinery Co. Ltd. (Tsuchiura Works, Intellectual Property Department, 650, Kandatsumachi, Tsuchiura-sh, Ibaraki 13, 30000, JP)
Egawa, Eiji c/o Hitachi Construction Machinery Co. Ltd. (Tsuchiura Works, Intellectual Property Department, 650, Kandatsumachi, Tsuchiura-sh, Ibaraki 13, 30000, JP)
Nakayama, Akira c/o Hitachi Construction Machinery Co. Ltd. (Tsuchiura Works, Intellectual Property Department, 650, Kandatsumachi, Tsuchiura-sh, Ibaraki 13, 30000, JP)
Takiguchi, Kazuo c/o Hitachi Construction Machinery Co. Ltd. (Tsuchiura Works, Intellectual Property Department, 650, Kandatsumachi, Tsuchiura-sh, Ibaraki 13, 30000, JP)
Toyooka, Tsukasa c/o Hitachi Construction Machinery Co. Ltd. (Tsuchiura Works, Intellectual Property Department, 650, Kandatsumachi, Tsuchiura-sh, Ibaraki 13, 30000, JP)
Sugaya, Makoto c/o Hitachi Construction Machinery Co. Ltd. (Tsuchiura Works, Intellectual Property Department, 650, Kandatsumachi, Tsuchiura-sh, Ibaraki 13, 30000, JP)
Sato, Kensuke c/o Hitachi Construction Machinery Co. Ltd. (Tsuchiura Works, Intellectual Property Department, 650, Kandatsumachi, Tsuchiura-sh, Ibaraki 13, 30000, JP)
International Classes:
B60K17/356; F16H45/00; F16H47/02; F16H61/44; F16H61/444; F16H61/452
Attorney, Agent or Firm:
Kasuga, Yuzuru (Torii-nihonbashi Bldg, 4-1 Nihonbashi-honcho 3-chom, Chuo-ku Tokyo 23, 10300, JP)
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