US 7,682,124 B2 · Tractor with backhoe

Abstract

A tractor with a backhoe is disclosed. The backhoe is mounted to a rear portion of the tractor. The backhoe has a boom, an arm pivotally supported to a leading end of the boom, a bucket pivotally supported to a leading end of the arm, a boom cylinder for operating the boom, an arm cylinder for operating the arm and a bucket cylinder for operating the bucket. The tractor includes a frame attached to a rear portion of the tractor, a swing bracket supported to a rear portion of the frame to be pivotable about a vertical axis, a control valve unit having control valves for controlling the boom cylinder, the arm cylinder and the bucket cylinder and a hose unit for feeding pressure oil from the control valve unit to the boom cylinder, the arm cylinder and the bucket cylinder. The wing bracket includes a first opening open to the front side and a second opening open to the rear side. The control valve unit is disposed, in its plan view, on an extension line of the first opening and the second opening. The hose unit extends substantially linearly from the control valve unit through the first opening to the second opening.

Drawings

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Drawings

Claims9

Dependent claims

A tractor with a backhoe, the backhoe being mounted to a rear portion of the tractor and having a boom, an arm pivotally supported to a leading end of the boom, a bucket pivotally supported to a leading end of the arm, a boom cylinder for operating the boom, an arm cylinder for operating the arm and a bucket cylinder for operating the bucket, said tractor comprising:

a frame attached to a rear portion of the tractor;
a swing bracket having a front side and a rear side supported to a rear portion of the frame to be pivotable about a vertical axis;
a control valve unit having control valves for controlling the boom cylinder, the arm cylinder and the bucket cylinder;
and
a hose unit for feeding pressure oil from the control valve unit to the boom cylinder, the arm cylinder and the bucket cylinder;
wherein said swing bracket includes a first opening open to the front side and a second opening open to the rear side;
said control valve unit is disposed, in its plan view, on an extension line of said first opening and said second opening, said hose unit extending substantially straight from said control valve unit through said first opening to said second opening;
and
wherein said frame includes an upper wall, a lower wall spaced downwardly of the upper wall, a vertical wall disposed from the upper wall to the lower wall for interconnecting the upper and lower walls so that front and rear faces of the vertical wall are oriented in the fore and aft direction, and a pair of right and left side walls extending forwardly from the front face of the vertical wall and interconnecting the upper and lower walls, said frame further including connected portions for attaching the frame to the rear portion of the tractor;
and wherein said control valve unit is disposed between the upper wall and the lower wall of the frame, said control valve unit being attached to said rear face of the vertical wall of the frame.

7 more elements

a frame attached to a rear portion of the tractor;
a swing bracket having a front side and a rear side supported to a rear portion of the frame to be pivotable about a vertical axis;
a control valve unit having control valves for controlling the boom cylinder, the arm cylinder and the bucket cylinder;
and
a hose unit for feeding pressure oil from the control valve unit to the boom cylinder, the arm cylinder and the bucket cylinder;
wherein said swing bracket includes a first opening open to the front side and a second opening open to the rear side;
said control valve unit is disposed, in its plan view, on an extension line of said first opening and said second opening, said hose unit extending substantially linearly from said control valve unit through said first opening to said second opening;
wherein said frame includes an upper wall;
a lower wall downwardly spaced from the upper wall;
a vertical wall disposed from the upper wall to the lower wall for interconnecting the upper and lower walls so that front and rear faces of the vertical wall are oriented in the fore and aft direction;
and a pair of right and left side walls extending forwardly from the front face of the vertical wall and interconnecting the upper and lower walls, said frame further including connected portions for attaching the frame to the rear portion of the tractor;
and
wherein each right/left outer portion of each said side wall includes an outrigger frame for attaching an outrigger, each said outrigger frame having a pair of front and rear walls spaced apart in the fore and aft direction and a connecting wall for connecting right/left inner ends of said front and rear walls;
said upper wall and said lower wall each is formed of a flat plate;
said vertical wall and each said side wall each is formed of a plate member, and
said front and rear walls and said connecting wall of the outrigger frame each is formed of a plate member.

13 more elements

a frame attached to a rear portion of the tractor;
a swing bracket having a front side and a rear side supported to a rear portion of the frame to be pivotable about a vertical axis;
a control valve having control valves for controlling the boom cylinder, the arm cylinder and the bucket cylinder;
and
a hose unit for feeding pressure oil from the control valve unit to the boom cylinder, the arm cylinder and the bucket cylinder;
wherein said swing bracket includes a first opening open to the front side and a second opening open to the rear side;
said control valve unit is disposed, in its plan view, on an extension line of said first opening and said second opening, said hose unit extending substantially straight from said control valve unit through said first opening to said second opening;
and
wherein said frame includes an upper wall, a lower wall spaced downwardly of the upper wall, and a vertical wall disposed from the upper wall to the lower wall for interconnecting the upper and lower walls so that front and rear faces of the vertical walls are oriented in the fore and aft direction, and wherein said control valve unit is disposed between the upper wall and the lower wall of the frame, said control valve unit being attached to said rear face of the vertical wall of the frame;
wherein said vertical wall has a cutout to allow communication between forward and rearward sides of the vertical wall, said swine cylinder extending from the forward side to rearward side of the vertical wall through said cutout;
and
wherein a swing cylinder is disposed within a space between the upper and lower walls and downwardly of the control valve unit.

9 more elements

Dependencies are inferred from the claim text.

Description7,780 words

Summary1,442 words

#1. Field of the Invention

#The present invention relates to a tractor having a backhoe attached to a rear side thereof.

#2. Description of the Related Art

Brief description of the drawings13 figures

#FIG. 1 is an overall side view of a tractor with a backhoe according to one embodiment of the present invention, showing the tractor having also a front loader mounted thereto in addition to the backhoe,

#FIG. 2 is a side view showing principal portions in FIG. 1,

#FIG. 3 is a rear view of the tractor, with the backhoe being detached therefrom,

Detailed description6,141 words

#Next, one preferred embodiment of the present invention will be described. In the following description, unless indicated otherwise, the languages of a fore and aft direction, a right/left direction and a vertical direction will all be used with reference to the forward traveling direction of the vehicle body.

#In FIG. 1 and FIG. 2, mark T denotes a tractor. Numeral 1 denotes a backhoe attached to the rear portion of the tractor T. Numeral 2 denotes a front loader optionally attached to the front portion of the tractor T. Numeral 3 denotes an attaching frame mounted on the vehicle body of the tractor T for attaching the backhoe 1 and the front loader 2 thereto.

#The tractor T employed herein is a two-shaft, four-wheel tractor having a pair of right and left front wheels 4 and a pair of right and left rear wheels 5. Though not shown, the vehicle body of this tractor T consists mainly of an engine mounted at a forward position thereof, a clutch housing connected to a rear side of the engine via a flywheel housing, and a transmission case connected to a rear side of the clutch housing. The engine is covered by a hood 6, and a driver's seat 7 is provided upwardly of the transmission case (at a rear upper portion of the vehicle body). A steering wheel 8 is provided forwardly of the driver's seat 7.

Facts

Application

11/375,360Filed 14 Mar 2006

Priority

JP 2005-14309116 May 2005

Published

US 2006/0254415 A116 Nov 2006

Granted

23 Mar 2010

Term ended

24 Aug 2026

Estimated · how

20 years from earliest known nonprovisional domestic filing plus recorded patent term adjustment, including 163 days of adjustment. Maintenance-fee lapses, terminal disclaimers and statutory extensions have not been checked. The continuity chain may be incomplete; this is not an enforceability determination.

Classification7 codes

E02F 3/384
Connections to the frame; Supports for booms or arms: the boom being pivotable relative to the frame about a vertical axis
E02F 9/2267
Arrangements or adaptations of elements for hydraulic drives: valves or distributors
E02F 9/2271
Arrangements or adaptations of elements for hydraulic drives: actuators and supports therefor and protection therefor
E02F 9/2275
Arrangements or adaptations of elements for hydraulic drives: hoses and supports therefor and protection therefor

Timeline

16 May 2005Priority claimedJP 2005-143091
14 Mar 2006Application filedUS 11/375,360
26 Jun 2006Assigned to Kubota Corporationassignment of assignor's interest
16 Nov 2006PublishedUS 2006/0254415 A1
23 Mar 2010GrantedUS 7,682,124 B2
24 Aug 2026Term endedEstimated, includes 163 days of adjustment

Tractor with backhoe

Life of this patent

Tractor with backhoe

Life of this patent

Life of this patent

Abstract

Drawings

Drawings

Claims9

Description7,780 words

Drawings

Classification7 codes

Life of this patent

Description7,780 words