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JPS56143859A - Stepless hydraulic transmission device - Google Patents

Stepless hydraulic transmission device

Info

Publication number
JPS56143859A
JPS56143859A JP4571280A JP4571280A JPS56143859A JP S56143859 A JPS56143859 A JP S56143859A JP 4571280 A JP4571280 A JP 4571280A JP 4571280 A JP4571280 A JP 4571280A JP S56143859 A JPS56143859 A JP S56143859A
Authority
JP
Japan
Prior art keywords
pressure passage
hydraulic pressure
neutral position
unloader valve
transmission device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP4571280A
Other languages
Japanese (ja)
Inventor
Hiroshi Ikegawa
Yoshimasa Matsuda
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Iseki and Co Ltd
Iseki Agricultural Machinery Mfg Co Ltd
Original Assignee
Iseki and Co Ltd
Iseki Agricultural Machinery Mfg Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Iseki and Co Ltd, Iseki Agricultural Machinery Mfg Co Ltd filed Critical Iseki and Co Ltd
Priority to JP4571280A priority Critical patent/JPS56143859A/en
Publication of JPS56143859A publication Critical patent/JPS56143859A/en
Pending legal-status Critical Current

Links

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  • Control Of Fluid Gearings (AREA)

Abstract

PURPOSE: To prevent a trouble of running of a machine body by a method wherein a high hydraulic pressure passage is communicated with a low hydraulic pressure passage when a transmission lever is at a neutral position and a rotation of the hydraulic motor is prevented even if a clearance is found in the transmission mechanism.
CONSTITUTION: Unloader valve 61 is arranged between a high hydraulic pressure passage 38 and a low hydraulic pressure passage 42 which communicates a hydraulic pump 3 with a hydraulic motor 23, the unloader valve is cooperated with the transmission lever 21 and further cooperated at its neutral position. Thus, when the transmission lever 21 is set at its neutral position, the unloader valve 61 communicates a high hydraulic pressure passage 38 and a low hydraulic pressure passage 42 in a short passage, so that a clearance is made in the transmission mechanism and so the hydraulic motor 23 is not rotated even if the inclination or slant plate 18 of the hydraulic pump 3 is slightly inclined.
COPYRIGHT: (C)1981,JPO&Japio
JP4571280A 1980-04-09 1980-04-09 Stepless hydraulic transmission device Pending JPS56143859A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4571280A JPS56143859A (en) 1980-04-09 1980-04-09 Stepless hydraulic transmission device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4571280A JPS56143859A (en) 1980-04-09 1980-04-09 Stepless hydraulic transmission device

Publications (1)

Publication Number Publication Date
JPS56143859A true JPS56143859A (en) 1981-11-09

Family

ID=12726954

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4571280A Pending JPS56143859A (en) 1980-04-09 1980-04-09 Stepless hydraulic transmission device

Country Status (1)

Country Link
JP (1) JPS56143859A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0495663A (en) * 1990-08-09 1992-03-27 Kubota Corp Work vehicle
KR100426539B1 (en) * 2000-07-31 2004-04-13 김경환 Continuously variable transmission

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0495663A (en) * 1990-08-09 1992-03-27 Kubota Corp Work vehicle
KR100426539B1 (en) * 2000-07-31 2004-04-13 김경환 Continuously variable transmission

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