Title:
INDUSTRIAL VEHICLE HYDRAULIC TRANSMISSION
Document Type and Number:
Japanese Patent JP2021080938
Kind Code:
A
Abstract:
To provide an industrial vehicle hydraulic transmission capable of achieving both improvement in clutch cooling performance with hydraulic oil and enhanced response of a clutch with respect to inching valve operation.SOLUTION: An industrial vehicle hydraulic transmission 20 comprises a clutch cooling hydraulic oil passage 38 which guides hydraulic oil passed through a torque converter 11 to a cooler 36 and also guides the hydraulic oil cooled with the cooler 36 to a clutch 12. The industrial vehicle hydraulic transmission also has: a conduction hydraulic oil passage which connects an inching valve 30 and the clutch cooling hydraulic oil passage 38 and guides a portion of hydraulic oil from the inching valve 30 to the clutch cooling hydraulic oil passage 38 during inching; a check valve 45 which is installed on the conduction hydraulic oil passage and prevents the hydraulic oil from flowing back to the inching valve 30; a drain hydraulic oil passage which is connected to a place between the check valve 45 and the inching valve 30 in the conduction hydraulic oil passage; and a residual pressure relief device which is installed on the drain hydraulic oil passage and releases residual pressure in the conduction hydraulic oil passage.SELECTED DRAWING: Figure 1
Inventors:
KUWAHARA KEISUKE
Application Number:
JP2019206261A
Publication Date:
May 27, 2021
Filing Date:
November 14, 2019
Export Citation:
Assignee:
TOYOTA IND CORP
International Classes:
F16D48/02; B66F9/22
Domestic Patent References:
| JPH0925960A | 1997-01-28 | |||
| JPH0512762U | 1993-02-19 |