Working machine

Patent metadata

Field	Value
Publication number	US-2022018089-A1
Application number	US-202117487768-A
Country	US
Kind code	A1
Filing date	Sep 28, 2021
Priority date	Mar 29, 2019
Publication date	Jan 20, 2022
Grant date	—

Abstract

A working machine includes a machine body, a traveling device travelably supporting the machine body, a hydraulic driving device to hydraulically drive the traveling device, a floor frame supported on the machine body via a mounting member, a pedal operable to brake the traveling device, the inching valve to change a flow rate of hydraulic fluid supplied to the hydraulic driving device according to operation of the pedal, and a cable operably connecting the pedal to the inching valve. The pedal and the inching valve are attached to the floor frame.

First claim

What is claimed is:

1 . A working machine comprising:
a machine body; a traveling device travelably supporting the machine body; a hydraulic driving device to hydraulically drive the traveling device; a floor frame supported on the machine body via a mounting member; a pedal operable to brake the traveling device; an inching valve to change a flow rate of hydraulic fluid supplied to the hydraulic driving device according to operation of the pedal; and a cable operably connecting the pedal to the inching valve, wherein the pedal and the inching valve are attached to the floor frame.

2 . The working machine according to claim 1 , wherein
the floor frame includes an installation part supporting an operator's seat, and the inching valve is attached to the installation part below the operator's seat.

3 . The working machine according to claim 2 , wherein
the floor frame includes an inspection opening, and the inching valve is disposed below the inspection opening so as to be accessible via the inspection opening.

4 . The working machine according to claim 3 , wherein
the floor frame includes a floor part forward of the installation part, the floor part includes
a floor main body including the inspection opening, and
an openable cover closing the inspection opening, and the inching valve is disposed below the openable cover.

5 . The working machine according claim 1 , wherein
the inching valve includes
a valve lever operably connected to the cable, and
a valve main body to which the valve lever is attached, and
the valve main body changes the flow rate of hydraulic fluid supplied to the hydraulic driving device according to rotation of the valve lever around a vertical axis by operating the pedal.

6 . The working machine according to claim 5 , further comprising:
a hydraulic pump to deliver the hydraulic fluid; and a hydraulic fluid tank disposed on a lateral side of the inching valve, wherein the valve main body includes
a back surface with a first joint port fluidly connected to a delivery circuit of the hydraulic pump,
a side surface, facing toward the hydraulic fluid tank, with a second joint port fluidly connected to the hydraulic fluid tank, and
an upper surface with an operation shaft operably connected to the valve lever.

7 . The working machine according to claim 2 , further comprising:
a frame member extended upward from a front portion of the floor frame, the pedal being attached to the frame member; a first cable stay fixed to the frame member, one end portion of the cable being attached to the first cable stay; an attachment bracket fixed to the installation part; a valve bracket attached to the attachment bracket, the inching valve being attached to the valve bracket; and a second cable stay attached to the valve bracket, the other end portion of the cable being attached to the second cable stay.

Assignees

• Kubota Kk

Inventors

• Takano Yuki
• Aizawa Tsutomu
• Matsushita Tetsuji

Classifications

• E02F9/2004

  Control mechanisms, e.g. control levers (control levers per se G05G) · CPC title

• E02F9/16

  Cabins, platforms, or the like, for drivers ({for motor vehicles in general B62D33/06}, for cranes B66C13/54) · CPC title

• E02F9/0833

  Improving access, e.g. for maintenance, steps for improving driver's access, handrails · CPC title

• E02F9/0841 Primary

  Articulated frame, i.e. having at least one pivot point between two travelling gear units (tractor-trailer combinations B62D53/00) · CPC title

• E02F3/3411

  of the Z-type · CPC title