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AssigneeKubota Corporation
InventorsKatsuhiko Yukawa, Takafumi Wada, Masanori Shintani, Junichi Fujiwara
Estimating the term…
A small swivel type working vehicle includes a running device (4), a swivel base (2) mounted on the running device (4) to be swivelable about a vertical swivel axis (X), a driver's seat (5) mounted on the swivel base (2), a control box (6) mounted upright on a top surface of the swivel base (2) forwardly of the driver's seat (5), a swing bracket (18) supported to be swingable about a vertical pivotal axis (19a) by a flange unit (17) provided at a front end of the swivel base (2), a boom (20) attached to the swing bracket to be swingable about a horizontal shaft (22), and a boom cylinder (21) connected at one end thereof to the swing bracket (18) and at the other end to the boom (20) for swinging the boom (20). The boom cylinder (21) is disposed outside the boom (20) to extend along a rear surface thereof. A walk-through space (100) is defined between the control box (6) and the driver's seat (5). A distance (L1) from the swivel axis (X) of the swivel base (2) to the vertical pivotal axis (19a) is substantially the same as a distance (L2) from the swivel axis (X) to a rear end of the swivel base(2).
A small swivel type working vehicle comprising:
Dependencies are inferred from the claim text.
From the US filing history. Foreign family members aren’t listed.
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Arrangements or adaptations of elements for hydraulic drives: valves or distributors
Working downwardly and towards the machine, e.g. with backhoes: backhoes of the miniature type
Connections to the frame; Supports for booms or arms: the boom being pivotable relative to the frame about a vertical axis
Arrangements or adaptations of elements for hydraulic drives: actuators and supports therefor and protection therefor
Term end not estimated
1. Field of the Invention
This invention relates to a small swivel type working vehicle, particularly a small backhoe, comprising a running device, a swivel base mounted on the running device to be swivelable about a vertical swivel axis, a driver's seat mounted on the swivel base, a control box mounted upright on a top surface of the swivel base forwardly of the driver's seat, a swing bracket supported to be swingable about a vertical pivotal axis by a flange unit provided at a front end of the swivel base, a boom attached to the swing bracket to be swingable about a horizontal shaft, and a boom cylinder connected at one end thereof to the swing bracket and at the other end to the boom for swinging the boom.
2. Description of the Related Art
FIG. 1 is a side elevation of a backhoe which is one example of swivel type working vehicles according to this present invention;
FIG. 2 is a plan view of the backhoe shown in FIG. 1;
FIG. 3 is a side view illustrating a front portion of the backhoe shown in FIG. 1;
An embodiment of this invention will be described hereinafter with reference to the drawings.
FIGS. 1 and 2 show an ultra-small backhoe 1 exemplify a swivel type working vehicle. The backhoe 1 includes crawlers 4 acting as a running device, a swivel base 2, and an excavating assembly 3 mounted on the swivel base 2.
Each crawler 4 includes a front roller 4A rotatable about an axis 4a at a front portion one of right and left side frames 31 constituting a track frame, a rear roller 4B rotatable about an axis 4b at a rear portion of the side frame 31, and a rubber or steel crawler belt 32 wound around these rollers. The rear rollers 4B act as drive rollers driven by right and left hydraulic propelling motors.