JPH07268909A - Tiltable dozer in working traveling vehicle - Google Patents

Abstract

PURPOSE:To reliably perform excavating-earth pushing work in a desired posture by recognizing an inclined quantity of a blade to a machine body by an operator by graduations of a blade rear face plate and a mark of a guide body. CONSTITUTION:A rear face plate 21 of a blade 15 is slidably applied to a butting plate 20 integrally arranged on the front end of a vertically freely swinging front arm 11 of a traveling vehicle for excavating-earth pushing work, and is fitted to and locked on a guide body 22 arranged in a hook shape on the rear face plate 21 so that vertical swinging is guided. Angle graduations 23 are arranged on a rear surface of the guide body 22, and a mark 24 corresponding to the angle graduations 23 is arranged on a rear surface of the butting plate 20. While looking at a rear surface condition of the blade 15 from an operation seat, an operator reads the graduations 23 indicated by the mark 24, and recognizes an inclination of the blade 15 to a machine body, and extends and contracts a tilting hydraulic cylinder 17, and performs reliable excavating- earth pushing work in a desired tilt posture. Since an exclusive member is not separately required to recognize the inclination, the number of part items is not increased.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tilt type dozer for a work vehicle equipped on a work vehicle such as a tractor and a hydraulic excavator.

[0002]

BACKGROUND OF THE INVENTION Generally,
In this type of work machine, there is one in which a dozer provided with an earth-discharging plate (blade) is provided as a work machine attachment. Among such dozers, a so-called tilt type in which the dozer can be forcibly tilted left and right There is one. However, conventionally, in such a tilt type, it is not possible to know exactly how much the tilt is, simply by allowing the dozer to tilt left and right, and as a result, the dozer is in a horizontal state. The reality was that the operator had to rely on his feelings.

[0003]

SUMMARY OF THE INVENTION The present invention was devised with the object of providing a tilt-type dozer for a work vehicle capable of eliminating these drawbacks in view of the above circumstances. A front arm that is vertically swingable on the machine body is provided with a blade for excavating and earthing work which is tiltably swingable left and right, and an actuator for horizontally swinging the blade. In the work vehicle, an inclination amount recognizing means for recognizing an inclination amount of the blade with respect to the machine body is provided between the blade and the front arm.

According to the present invention, the angle of inclination of the dozer can be recognized with certainty.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, one embodiment of the present invention will be described with reference to the drawings. In the drawings, reference numeral 1 denotes a traveling machine body of a hydraulic excavator, which is a construction machine, and the traveling machine body 1 is provided with a lower traveling body 2 including a crawler type traveling device, and is rotatably provided on the lower traveling body 2. The upper revolving structure 3 and the driver's seat 4, the boom 5, the arm 6, the bucket 7 and the like provided on the upper revolving structure 3 are used as in the related art. Incidentally, in the embodiment, the pipe 3a for supplying the pressure oil to the arm 6 and the hydraulic cylinder on the bucket 7 side is provided at the front portion of the upper swing body 3 and the swing body frame 3 is provided.
Although it is arranged so as to penetrate through the through hole 3c formed in b, the revolving structure frame 3b is designed so that the portion where the through hole 3c is formed has a large thickness. Since it is not necessary to increase the thickness of other parts, the weight can be reduced, and the contact area of the pipe 3a with respect to the through hole 3c is increased to diffuse the contact range. As a result, the pipe 3a in a tension state when supplying pressure oil is It is possible to reduce the surface pressure at the time of contacting the through hole 3c and to protect the pipe 3a.

Reference numeral 8 is a dozer in which the present invention is implemented.
The dozer 8 is detachably attached to the front portion of the lower traveling body 2 as a front attachment. That is, the front arm 11 is pivotally supported by the bracket 9 integrally provided on the front end portion of the frame 2a of the lower traveling body 2 through the mounting shaft 10 so as to be vertically swingable. Is a lifting hydraulic cylinder 1 provided between the front arm 11 and the frame 2a.
It is configured to swing up and down by the expansion and contraction operation of 2.

A support frame 13 is provided in a bridge shape at the front end of the front arm 11, and a support cylinder 14 is arranged below the center position of the support frame 13 in the left-right direction so that its axial center is oriented in the front-back direction. It is provided integrally. On the other hand, reference numeral 15 denotes a blade, and a front end portion of a support shaft 16 is integrally provided at a center position of the blade 15 in the left-right direction, and a rear end portion of the support shaft 16 protruding from a blade rear end is supported by the support. The cylinder 14 is rotatably supported around the axis.

Reference numeral 17 denotes a tilt hydraulic cylinder for swinging the blade 15. The tilt hydraulic cylinder 17 is provided with a support bracket 18 integrally projecting upward from the front end portion of the front arm 11. The blade 15 is interposed between a rear end portion of the blade 15 and a support bracket 19 integrally provided on the center portion in the left-right direction. And blade 1
Reference numeral 5 is set so that the tilt hydraulic cylinder 17 is expanded and contracted so that the tilt hydraulic rocking can be performed with the support shaft 16 as a fulcrum.

Reference numeral 20 denotes a backing plate integrally provided at the front end of the front arm 11, and the blade 20 is attached to the backing plate 20 correspondingly.
The rear face plate 21 will be slidably applied,
An outer edge portion of the backing plate 20 is fitted and locked to a guide body 22 provided in a hook shape on the rear plate 21 of the blade 15 so as to perform a vertical swing guide. A scale (angle scale) 23 is provided on the rear surface of the guide body 22 (that is, the surface visible to the operator sitting in the driver's seat 4). On the other hand, the backing plate 2
Marks 24 are provided on the rear surface of 0 corresponding to the scales 23. Then, by reading the scale 23 indicated by the mark 24, the inclination angle of the blade 15 with respect to the body can be known.

In the embodiment of the present invention configured as described above, when performing excavation and earthing work using the blade 15, either the right or left side of the blade 15 is raised by expanding and contracting the hydraulic cylinder 17 for tilting. The tilted posture is achieved, and the excavation and embankment work can be performed in this tilted posture.

As described above, according to the embodiment of the present invention, the excavation and earth-moving work in the tilted posture can be performed. In that case, the mark 24 indicates the inclination angle of the blade 15 with respect to the body. It can be recognized immediately by reading the scale 23 being pointed, and as a result, the excavation and embankment work in a desired posture can be reliably performed.

Moreover, the scale 23 and the mark 24 for recognizing the inclination angle of the blade 15 are provided with the guide body 22 and the contact plate 20 necessary for guiding the blade 15.
Since it is provided in the above, there is no need to prepare a dedicated member separately, and there is no problem such as an increase in the number of parts. In addition, it is very natural in excavation and earthing work performed while observing the state of the rear surface of the blade 15. Moreover, there is an advantage that the tilted state of the blade 15 can be recognized.

The present invention is not limited to the above embodiment, but it is also possible to provide a scale on the backing plate and a mark on the guide body. Further, as in the second embodiment shown in FIG. 7, marks (match marks) 25, 25 set to face each other in a parallel state.
May be simplified. Furthermore, the amount of tilt may be converted into an electrical signal. As such, a detection sensor may be provided in the support shaft portion in order to detect the rotation amount of the blade support shaft 16. In addition, as in the third embodiment shown in FIG. A detection sensor (such as a stroke sensor) for detecting the amount of inclination of the blade 15 with respect to the body between the backing plate 20.
If 26 is provided and the detection signal from the detection sensor 26 is automatically controlled so as to match the adjustment amount of the tilt adjuster 27 provided in the driver's seat, automatic tilt control can be performed and operability can be improved. However, in this case, by providing the horizontal detection sensor 28 on the machine body side and correcting the tilt angle with respect to the horizontal line of the machine body calculated based on the detection value of the horizontal detection sensor 28, the tilt angle of the blade 15 with respect to the horizontal line can be controlled. It is convenient because it can be done automatically.

[0014]

In summary, since the present invention is constructed as described above, the operator recognizes the tilt amount of the blade with respect to the machine body by the tilt amount recognizing means when performing the excavation and embankment work in the tilt posture. As a result, the excavation and embankment work in a desired posture can be reliably performed. Further, the inclination amount recognizing means, a backing plate provided on the front frame side to guide the swing of the blade,
If it is installed on the guide body that guides the board,
There is an advantage that it is not necessary to separately prepare a dedicated member for the inclination amount recognizing means, and it is possible to recognize the inclination state of the blade very naturally in the excavation and embankment work performed while observing the state of the rear surface of the blade.

[Brief description of drawings]

FIG. 1 is a side view of a hydraulic excavator.

FIG. 2 is a plan view of a dozer.

FIG. 3 is a front view of a dozer.

FIG. 4 is a rear view of the dozer.

FIG. 5 is a partial cross-sectional side view of the dozer.

FIG. 6 is an enlarged view of a main part.

FIG. 7 is an enlarged view of an essential part showing a second embodiment.

FIG. 8 is an enlarged view of an essential part showing a third embodiment.

FIG. 9 is an enlarged view showing a piping state.

[Explanation of symbols]

 8 Dozer 11 Front Arm 15 Blade 17 Hydraulic Cylinder for Tilt 20 Abutting Plate 22 Guide Body 23 Scale 24 Mark 25 Matching Mark 26 Tilt Amount Detection Sensor

Claims (5)

[Claims] 1. A blade for excavation and earthmoving work, which is provided at a tip end portion of a front arm that is swingably moved up and down on a machine body so as to be tilted left and right, and an actuator for tilting the blade horizontally and tilted. A tilt type in a working vehicle, characterized in that tilt amount recognizing means for recognizing a tilt amount of the blade with respect to the body is provided between the blade and the front arm. Dozer. 2. The tilt amount recognizing means according to claim 1,
A tilt-type dozer for a working vehicle, comprising a scale and a mark facing the scale. 3. The tilt amount recognizing means according to claim 1,
A tilt-type dozer for a work vehicle, wherein the blades are formed of matching marks that face each other in a horizontal posture with respect to the machine body. 4. The tilt amount recognizing means according to claim 1,
A tilt-type dozer for a work vehicle, comprising tilt detecting means for converting the amount of tilt of the blade with respect to the airframe into an electric signal and outputting the electric signal. 5. The tilt amount recognizing means according to claim 1, wherein the tilt amount recognizing means is provided on a backing plate provided on the front frame side for guiding the swinging movement of the blade and a guide body for guiding the plate. A tilt-type dozer for work vehicles that is characterized by being