JP2005008016A - Tractor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily change the attitude of a driver's seat, and to quickly and easily perform moving between a operating part in front of the driver's seat and a working device behind it. <P>SOLUTION: In this tractor, the driver's seat 8 is provided on a tractor vehicle body 2, the operating part 43 of the tractor 1 and the working device 13 are provided in front of and behind the driver's seat 8, respectively, and the driver's seat 8 takes each attitude of a forward attitude for making the operating part 43 operable and a backward attitude for making the working device 13 operable. On left and right sides of the driver's seat 8 on the tractor vehicle body 2, passages 52 for enabling a person to pass in the longitudinal direction between the operating part 43 and the working device 13 are provided at positions lower than a supporting part 6a of the driver' seat 8 of a floor sheet 6 for covering a hydraulic device 5. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a tractor provided with a work device such as a backhoe at the rear of a tractor vehicle body.
[0002]
[Prior art]
Conventionally, there is a work vehicle called a TLB (tractor / front loader / backhoe) configured by mounting a front loader on a front portion of a tractor and a backhoe on a rear portion (for example, Patent Documents 1 to 3). .
The tractor employed in the TLB includes a driver's seat that can be reversed in the front-rear direction via a reverse support mechanism on the vehicle body, and a steering portion having a steering handle and a steering floor in front of the driver's seat. The front loader and the backhoe are each provided with an operation lever.
[0003]
And when driving the tractor or working with the front loader, the driver's seat can be operated forward and the steering wheel, control lever, etc. can be operated, and when working on the backhoe, the driver's seat must be turned backwards. The backhoe control lever can be operated by reversing its posture.
[0004]
[Patent Document 1]
JP-A-9-9713 [Patent Document 2]
JP 2001-63640 A [Patent Document 3]
Japanese Patent Laid-Open No. 2002-80549
[Problems to be solved by the invention]
In the case of the above-described tractor, for example, when moving to a destination and then shifting to excavation work, the operator changes the driver's seat from the control unit side to a backward posture, and then descends to the ground once to the rear side of the tractor. It is necessary to perform an operation such as moving to, and sitting on the driver's seat using a step on the backhoe side or the like (for example, Patent Document 1).
This is because a large number of operating levers such as the hydraulic elevating device operating lever and traveling system auxiliary transmission lever are scattered between the front and back of the control unit and the backhoe, especially around the driver's seat. This is because it is difficult to secure a space for the worker to move.
[0006]
As a result, the labor required for the movement of workers increases, the work efficiency deteriorates because it is not possible to immediately shift to excavation work, and the mud on the ground often rides on the tractor or backhoe. It is necessary to perform maintenance such as high frequency.
In view of this, there is a type in which a passage is formed on the tractor vehicle body on the left and right sides of the driver's seat so that the control unit and the work device can pass back and forth (for example, Patent Document 2).
[0007]
However, in this conventional case, the passage provided on the left and right sides of the driver's seat is provided at a height position substantially the same as the support portion of the driver's seat of the floor seat that covers the hydraulic device. When the driver's seat is rotated in this state, it is inconvenient that the operator's knee must be lifted high and the lower end of the leg must be raised higher than the height of the support portion of the driver seat on the floor seat. . In addition, since the passage is high, when the hand is put on the fender or the like so as not to fall down when passing through the passage, it is necessary for the operator to bend down greatly and it is inconvenient to pass.
[0008]
In view of the above problems, the present invention can easily change the posture of the driver's seat and can quickly and easily move between the control unit in front of the driver's seat and the rear working device.
[0009]
[Means for Solving the Problems]
The technical means of the present invention for solving this technical problem is that a driver's seat 8 is provided on the tractor body 2, a control unit 43 of the tractor 1 is provided in front of the driver's seat 8, and a work device 13 is provided in the rear. A tractor provided so that the driver's seat 8 can take each of a forward posture in which the operation unit 43 can be operated and a rearward posture in which the work device 13 can be operated;
On the left and right sides of the driver's seat 8 on the tractor vehicle body 2, a passage 52 that allows the control unit 43 and the working device 13 to pass back and forth is a driver seat of the floor seat 6 that covers the hydraulic device 5. 8 is provided at a position lower than the support portion 6a.
[0010]
Another technical means of the present invention is that the passage 52 is disposed at a height position substantially corresponding to the rotation support shaft portion 20 of the lift arm of the hydraulic device 5.
Another technical means of the present invention is that a cover member 53 covering the base side of the operation lever 50 on the left and right sides of the driver's seat 8 is disposed at a position lower than the lower surface of the driver's seat 8. .
Another technical means of the present invention is that the passage 52 is supported on the axle case 18 or the brake case 17 via a stay 57.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 6 shows a tractor 1 according to the present invention. The tractor 1 includes a tractor vehicle body 2 composed of an engine, a transmission case and the like, and a pair of left and right front and rear wheels 3 and 4 are provided in the front and rear of the vehicle body 2. I have.
Further, the tractor vehicle body 2 has a hydraulic device 5 for raising and lowering the working machine mounted on the three-point ring, and a floor seat 6 covering the upper portion of the hydraulic device 5 at the upper part. A driver's seat 8 is provided on 6 so as to be capable of reversing back and forth via a reversing support device 7. In addition, wheel fenders 9 that cover the front and upper sides of the rear wheels 4 are attached and fixed to the left and right sides of the floor seat 6 via fasteners such as bolts.
[0012]
A front loader 12 is attached to the front portion of the tractor vehicle body 2 via an attachment frame 11, and a backhoe (working device according to the present invention) 13 is detachably attached to the rear portion of the tractor vehicle body 2 via the attachment frame 11. These are used to construct a work vehicle called a TLB (tractor, front loader, backhoe).
Below the floor seat 6, as shown in FIG. 1, a mission case 16, a pair of brake cases 17 located on both left and right sides of the mission case 16, and a pair of left and right rears located outside each brake case 17 An axle case 18 is disposed, the hydraulic device 5 is placed and fixed on the upper surface of the transmission case 16, and a rotation support shaft portion 20 of a lift arm is provided on both the left and right sides of the hydraulic device 5.
[0013]
The mounting frame 11 has a front side fixed to the side of the vehicle body 2 and a rear side connected to the rear axle case 18. The rear upper part of the mounting frame 11 is configured as a front portal structure. The lower end of the lops 15 is fixedly attached.
The backhoe 13 includes a machine frame 21 that is detachably connected to the rear part of the mounting frame 11, and a drilling device 22 that is provided at the rear part of the machine frame 21. A swivel frame 23 pivotally supported, a boom 24 pivotally supported by the swivel frame 23, and an arm pivotally supported at the upper part of the boom 24. 25, and a bucket 26 pivotally supported at the front end of the arm 25 so as to be able to swing back and forth. The swing frame 23, the boom 24, the arm 25 and the bucket 26 are each a swing cylinder 27 made of a hydraulic cylinder, The boom cylinder 28, the arm cylinder 29, and the bucket cylinder 30 are swung.
[0014]
A step 31 protruding forward toward the tractor vehicle body 2 side is provided at the upper portion of the machine casing 21, and an operation box 33 having an operation lever 32 and the like is provided upright on the step 31. A stabilizer 34 is provided on both the left and right sides of the machine casing 21 so as to be vertically swingable by a swing cylinder 35 via brackets.
On the tractor vehicle body 2 in front of the driver's seat 8, a control unit 43 having a control handle 40, a control floor 41, a pedal device such as a brake and an accelerator, etc. is provided. It can be used for driving.
[0015]
The reversal support device 7 is provided between the left and right wheel fenders 9 at the center of the left and right sides of the floor seat 6. The reversal support device 7 is a floor seat as shown in FIGS. 1 and 2. A base member 45 fixed to the base member 45, and a seat base 47 rotatably provided on the base member 45 via a vertical support shaft 46, and slides provided on the left and right sides of the seat base 47. The driver's seat 8 is supported via the rail 48 so that the front-rear position can be adjusted.
The reversing support device 7 is provided with lock means (not shown) that enables the driver's seat 8 to be positioned in a forward posture or a rearward posture. By releasing the lock means, the seat base with respect to the base member 45 is provided. 47 can be rotated horizontally so that the posture of the driver's seat 8 can be changed.
[0016]
As shown in FIGS. 1 to 3, the upper surface of the floor seat 6 (the right side portion 6 b of the floor seat 6) on the right side of the driver seat 8 is flush with the support portion 6 a of the driver seat 8 of the floor seat 6. A plurality of operation levers 50 such as an operation lever for the hydraulic device 5 and a sub-shift lever for the traveling system are concentrated on the right side portion 6b. In addition, on the floor seat 6 between the left side of the driver's seat 8 and the left wheel fender 9, an operator moves back and forth between the control floor 41 of the control unit 43 and the step 31 of the backhoe 13. A passage 52 configured to be able to pass through is formed. The passage 52 is disposed at a height position substantially corresponding to the rotation support shaft portion 20 of the lift arm of the hydraulic device 5.
[0017]
The base side of the operation lever 50 is covered with a cover member 53 having guide grooves 55 and 56 for guiding the swing of the operation lever 50, and this cover member 53 is bolted onto the floor sheet 6. In addition, the right wheel fender 9 is also connected with a bolt. Therefore, the cover member 53 has a function as a reinforcing member of the wheel fender 9. The cover member 53 that covers the base side of the operation lever 50 on the left and right sides of the driver's seat 8 is disposed at a position lower than the lower surface of the driver's seat 8.
[0018]
On the other hand, the passage 52 is provided at a position lower than the support portion 6a from the mounting portion of the inversion support device 7 of the floor seat 6, that is, the support portion 6a of the driver's seat 8 through the step portion 6c. 5 is disposed at a height position substantially corresponding to the rotation support shaft portion 20 of the lift arm.
Although not shown, a step member having an anti-slip function may be attached to the upper surface of the passage 52.
In addition, it is possible to provide an anti-slip function by forming irregularities on the surface of the floor sheet 6, but it is difficult to remove mud as described above, so a step member separate from the floor sheet 6 is used. It is preferable to provide it detachably.
[0019]
The passage 52 is supported by the axle case 14 or the brake case 17 via a stay 57.
As shown in FIGS. 4 and 5, the support shaft 46 of the driver's seat 8 includes an outer cylindrical body 59 that is penetrated and fixed to the seat base 47, and a cylindrical screw shaft body 60 that is screwed into the outer cylindrical body 59. A bottomed cylindrical outer cylinder 61, and a bottom 61 a of the outer cylindrical body 61 is sandwiched and fixed between a head 60 a of the screw shaft body 60 and a lower end of the outer cylindrical body 59. Is fixed to the base member 45 in a penetrating manner. Accordingly, the outer cylindrical body 59 of the support shaft 46 is rotated about the vertical axis A in the vertical direction via the screw with respect to the screw shaft body 60, whereby the driver's seat 8 is moved together with the seat base 47 and the outer cylindrical body 59. As described above, horizontal rotation is possible around the vertical axis A.
[0020]
A detection sensor 63 that detects an operator seated on the driver's seat 8 by pressure or the like is provided below the front end of the seat portion of the driver's seat 8. An electrical harness 64 connected to the detection sensor 63 projects from the detection sensor 63 below the driver's seat 8 and is inserted into the outer cylindrical body 59 and the screw shaft body 60 of the support shaft 46, below the base member 45. And is connected to a battery or the like provided in the front bonnet of the tractor vehicle body 2 or the like.
Therefore, even if the posture of the driver's seat 8 is changed by rotation, the electric harness 64 does not wrap around the support shaft 46 and does not interfere with the operation presence control (OPC) system.
[0021]
In the above configuration, when driving the tractor 1 or performing an operation using the front loader 12, the driver's seat 8 is set in a forward-facing posture via the reversing support device 7, so that the steering handle 40 and the like in the pilot unit 43 is provided. The operation lever of the front loader 12 can be operated.
And when shifting from each said operation | work to the excavation work by a backhoe, the driver's seat 8 is reversed to a back-facing attitude | position via the inversion support apparatus 7 from the control part 43 side.
At this time, since a plurality of operation levers 50 are concentrated on the right side of the driver's seat 8 and a wide passage space is formed on the left side, a portion having a large turning radius of the driver's seat 8 ( In the illustrated example, the driver's seat 8 does not interfere with the operation lever 50 by rotating the front portion of the driver's seat 8 toward the passage 52 side.
[0022]
Therefore, the driver's seat 8 can be horizontally rotated at the same level between the forward posture and the rearward posture, and can be quickly and easily reversed with a simple structure without a mechanism for raising the driver's seat 8 as in the prior art. It will be a thing. A passage 52 provided on the left and right sides of the driver seat 8 is provided at a position lower than the support portion 6 a of the driver seat 8 of the floor seat 6 that covers the hydraulic device 5, and the passage 52 is a lift arm of the hydraulic device 5. For example, when the driver's seat 8 is rotated in a state where the operator is seated, the operator's leg should be directed toward the passage 52 side. Therefore, it is not necessary to lift the operator's knee high and raise the lower end of the leg higher than the height of the support portion, and the driver's seat 8 can be smoothly rotated to change the posture. In addition, since the cover member 53 that covers the base side of the operation lever 50 is disposed at a position lower than the lower surface of the driver seat 8, the driver seat 8 covers the driver seat 8 when the driver seat 8 is rotated about the support shaft 46. There is no possibility of interfering with the member 53, and the driver's seat 8 can be smoothly rotated to change the posture easily. Further, since the passage 52 is supported by the axle case 14 or the brake case 17 via the stay 57, the passage 52 can be made strong enough to support the weight of the operator with a simple support structure. can do.
[0023]
Then, after the driver's seat 8 is changed to the rearward posture, the operator moves from the control floor 41 through the passage 52 on the left side of the driver's seat 8 to the step 31 of the backhoe 13 and is seated on the driver's seat 8. Is in a state in which the operation lever 32 of the backhoe 13 can be operated. At this time, since the passage 52 is low, the operator does not need to bend down greatly even when the fender or the like is touched so as not to fall over when passing through the passage 52, which is convenient for passage.
Therefore, the operator can quickly move to the backhoe 13 side on the tractor body 2 without getting down to the ground, reducing the labor required for the movement, and can immediately start the next work, improving work efficiency. It will be possible. Further, since it is less likely that the mud on the ground rides on the backhoe 13 side, cleaning and the like can be easily performed.
[0024]
In order to shift from the backhoe 13 operation to the traveling operation of the tractor and the operation of the front loader 12, an operation opposite to the above may be performed.
The present invention is not limited to the above-described embodiment, and can be appropriately changed in design.
For example, the left-right arrangement of the passage on the tractor vehicle body and the operation lever 50 is not limited to the above, and may be configured to be reversed left and right. Further, the driver's seat 8 is not limited to the one whose posture is changed by horizontal rotation, but may be configured to be detached from the floor seat 6 and inverted. Furthermore, a driver seat in a forward posture and a driver seat in a rear posture may be individually provided on the tractor vehicle body.
[0025]
The working device attached to the rear portion of the tractor vehicle body 2 is not limited to the backhoe 13 and can be replaced with another working device. The present invention is limited by the presence or absence of the front loader 12 at the front portion of the tractor vehicle body 2. It is not a thing.
[0026]
【The invention's effect】
According to the present invention, the posture of the driver's seat can be easily changed, and the movement between the control unit in front of the driver's seat and the rear working device can be quickly and via the passage formed on the left and right sides of the driver's seat. It becomes easy to do.
[Brief description of the drawings]
FIG. 1 is a front view of a tractor rear side showing an embodiment of the present invention.
FIG. 2 is a side view of the same.
FIG. 3 is a plan view of the same.
FIG. 4 is a side view showing a structure of a support portion of the driver seat.
FIG. 5 is a side cross-sectional view showing a configuration of a support shaft portion of the driver seat.
FIG. 6 is a side view of the rear side of the tractor.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Tractor 2 Tractor vehicle body 5 Hydraulic device 6 Floor seat 6a Support part 8 Driver's seat 13 Backhoe (working device)
17 Brake case 18 Rear axle case 20 Rotating support shaft portion 43 Control portion 50 Operation lever 52 Passage 53 Cover member 57 Stay

Claims (4)

A driver's seat (8) is provided on the tractor vehicle body (2), a control unit (43) of the tractor (1) is provided in front of the driver's seat (8), and a work device (13) is provided in the rear. In the tractor in which the driver's seat (8) is provided to take the postures of a forward posture that allows the operation unit (43) to be operated and a rearward posture that allows the work device (13) to be operated.
On the left and right sides of the driver's seat (8) on the tractor body (2), there is a passage (52) that can pass back and forth between the control unit (43) and the work device (13). The tractor characterized by being provided in the position lower than the support part (6a) of the driver's seat (8) of the floor seat (6) which covers an apparatus (5). The tractor according to claim 1, wherein the passage (52) is arranged at a height position substantially corresponding to the rotation support shaft portion (20) of the lift arm of the hydraulic device (5). The cover member (53) covering the base side of the left and right operation lever (50) of the driver seat (8) is disposed at a position lower than the lower surface of the driver seat (8). The tractor according to 1. The tractor according to claim 1, wherein the passage (52) is supported by an axle case (18) or a brake case (17) via a stay (57).

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