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1. 发明申请

WO2019110122A1 AN IMPLEMENT ATTACHMENT DEVICE 审中-公开
公开(公告)号：WO2019110122A1
公开(公告)日：2019-06-13
申请号：PCT/EP2017/082058
申请日：2017-12-08
申请人： VOLVO CONSTRUCTION EQUIPMENT AB
发明人： HAHN, Christian
IPC分类号： E02F3/36 , E02F9/22 , F15B11/00
CPC分类号： E02F9/226 , E02F3/3631 , E02F3/3663
摘要： The invention provides an implement attachment device (1000), for selectively attaching an implement to a working machine, comprising - a hydraulic cylinder (1100) comprising a cylinder housing with first and second longitudinal ends, a piston (1110) in the cylinder housing, and a piston rod (1111) fixed to the piston and protruding through the first end of the cylinder housing, - an attachment element (1115) being connected to a protruding portion of the piston rod, and adapted to engage with a complementary element of the implement, - a hydraulic conduit and valve arrangement (1201-1204) connected to the hydraulic cylinder (1100), - wherein the conduit and valve arrangement (1201-1204) is arranged to selectively allow a communication between a piston side chamber (1120) of the hydraulic cylinder (1100) and a rod side chamber (1121) of the hydraulic cylinder (1100).

2. 发明申请

WO2019192669A1 A WORKING MACHINE, A WORK ATTACHMENT AND A COMBINATION THEREOF 审中-公开
公开(公告)号：WO2019192669A1
公开(公告)日：2019-10-10
申请号：PCT/EP2018/025095
申请日：2018-04-06
申请人： VOLVO CONSTRUCTION EQUIPMENT AB
发明人： HAHN, Christian , DUSEMUND, Björn
IPC分类号： E02F3/36 , E02F9/20 , E02F3/96
摘要： The invention relates to a working machine (1) comprising a work attachment connection arrangement (3, 11a, 15a, 16a) configured to operationally connect to the working machine (1) a work attachment (2) provided with a work tool (4), such as a sweeper/rotary broom, a snow blower or a bucket; and a control system (10, 11) configured to control the operation of the working machine (1) and to, when the work attachment (2) is connected to the working machine (1) via the work attachment connection arrangement (3), control the operation of the work attachment (2). The working machine (1) further comprises: at least a first electric motor (5) configured for operation of the working machine (1); a first rechargeable battery (7) configured to supply the first electric motor (5) with electric power; an electric power circuit (8) connecting the first electric motor (5) and the first rechargeable battery (7), wherein the work attachment connection arrangement (3) comprises a first electrical connector (15a) connected to the electric power circuit (8) of the working machine (1), wherein the first electric connector (15a) is configured to be connected to a corresponding electrical connector (15b) arranged on the work attachment (2), wherein the corresponding electrical connector (15b) is connected to an auxiliary rechargeable battery (17) arranged on the work attachment (2), so as to allow electric connection of the auxiliary rechargeable battery (17) to the electric power circuit (8) of the working machine (1) when the work attachment (2) is connected to the working machine (1) via the work attachment connection arrangement (3). The invention also relates to a work attachment (2) of the above type and a combination of a working machine (1) and a work attachment (2) of the above types.

3. 发明申请

WO2021249614A1 A POWER STEERING SYSTEM FOR A WORKING MACHINE 审中-公开
公开(公告)号：WO2021249614A1
公开(公告)日：2021-12-16
申请号：PCT/EP2020/065807
申请日：2020-06-08
申请人： VOLVO CONSTRUCTION EQUIPMENT AB
发明人： HAHN, Christian
IPC分类号： B62D5/32
摘要： The invention relates to a power steering system (2) for a working machine (4), said power steering system comprising at least one steering cylinder (10), comprising two compartments separated by a piston (11), a liquid tank (12), a steering unit (14) comprising a steering valve (16) and a metering device (18), for supplying one compartment of the steering cylinder with a metered flow of liquid, a hydraulic pump (22), for pumping liquid from the liquid tank to the steering unit through a supply line (24), a return line (26) through which the liquid can flow from the steering unit back to the liquid tank, a recirculation line (28) connecting the return line to the supply line, a check valve (44) being arranged on said recirculation line to prevent liquid from flowing from the supply line to the return line, two control lines (30, 32), respectively connecting the steering unit to the two compartments of the steering cylinder and a liquid accumulator (34) connected through a branch (35) to the return line (26). A relief valve (36) is arranged on the return line (26) between the liquid tank (12) and a connection point (38) of the accumulator (34).

4. 发明公开

EP4161817A1 A POWER STEERING SYSTEM FOR A WORKING MACHINE 有权
公开(公告)号：EP4161817A1
公开(公告)日：2023-04-12
申请号：EP20731458.4
申请日：2020-06-08
申请人： Volvo Construction Equipment AB
发明人： HAHN, Christian
IPC分类号： B62D5/32

5. 发明公开

EP3775397A1 A WORKING MACHINE, A WORK ATTACHMENT AND A COMBINATION THEREOF 审中-实审
公开(公告)号：EP3775397A1
公开(公告)日：2021-02-17
申请号：EP18717219.2
申请日：2018-04-06
申请人： Volvo Construction Equipment AB
发明人： HAHN, Christian , DUSEMUND, Björn
IPC分类号： E02F3/36 , E02F9/20 , E02F3/96

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