JP2003054389A - Tractor lifting equipment - Google Patents

Abstract

(57) [Problem] To provide a tractor lift device capable of easily lifting a tractor body at a required place. SOLUTION: A tractor body 2 movably supported by a front wheel and a rear wheel 8 or a crawler unit is provided with a lower link 37 which can swing up and down within a predetermined range, and a stand 48 which supports the tractor body 2 in a lifted state. The stand 48 is rotatably supported at the upper part by the tractor body 2 and is grounded at the lower part, and the tractor is advanced in the front-rear direction from a state where the rear wheels 8 and the like are grounded. Rotating relative to the tractor body 2,
The tractor body 2 is lifted by the stand 48 to lift the rear wheel 8 and the like.
8 interlocks with the turning operation of the stand 8 and stops the turning operation of the stand 48 by engaging with the lower link 37 located at the end of the swing range while the rear wheel 8 and the like are floated. 55 are provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tractor lift device for lifting a tractor vehicle body to levitate front wheels or rear wheels or a crawler belt unit for supporting the tractor vehicle body from a ground contact surface.

[0002]

2. Description of the Related Art In a tractor, a screw jack or a hydraulic jack is used to lift the vehicle body of the tractor and lift the front wheel or the rear wheel from the ground when adjusting the treads of the front and rear wheels or changing the tires. Jacks, etc.,
It is done by a crane.

[0003]

The lifting of the tractor body by the crane has a problem that it cannot be carried out without the equipment. When the tractor body is lifted by the jack, it takes a relatively long time and a relatively long time. There is a problem in that it is inconvenient to carry a large jack and it is troublesome to handle. In view of the above problems, it is an object of the present invention to provide a tractor lift device that can easily lift a tractor vehicle body at a necessary place.

[0004]

The technical means taken by the present invention to solve the technical problem is a lower link which is vertically swingable within a predetermined range on a tractor body movably supported by a traveling body. And a stand that supports the tractor vehicle body in a lifted state.The stand has an upper portion pivotally supported by the tractor vehicle body and a lower portion grounded,
The stand is rotated relative to the tractor vehicle body by moving the tractor forward and backward from the state where the vehicle body is in contact with the ground, and the tractor vehicle body is lifted by the stand to levitate the vehicle body. , A linkage body that is interlocked with the rotation operation of the stand and that engages with a lower link located at the end of the swing range to stop the rotation operation of the stand while the traveling body is levitated. It is characterized by

Further, another technical means is provided with a stand in which an upper part is rotatably supported by a tractor body movably supported by a traveling body and a lower part is grounded, and the traveling body is grounded. From the above, by moving the tractor in the front-rear direction to rotate the stand relatively to the tractor vehicle body, or by forcibly rotating the stand with respect to the tractor vehicle body by the power of the actuator, The tractor body is configured to be lifted to float the traveling body, and a marker is displayed to indicate a state where the tractor body is lifted by the stand.

Another technical means is to provide a mounting portion at the front of a tractor body movably supported by a traveling body, one end side of which is pivotally supported and the other end side of which is rotatably supported. A stand for grounding is provided, and by moving the tractor forward and backward from a state where the traveling body is in contact with the ground, the stand rotates relatively to the tractor vehicle body, and the tractor vehicle body is lifted by the stand to levitate the traveling body. The stand is characterized in that, when not in use, the stand is attached to the mounting portion so as to project upward from the mounting portion and can be changed in posture to function as a front guard.

The mounting portion has an insertion space through which one end side of the stand can be inserted from above and below. By inserting one end side of the stand from above into the insertion space and fixing the stand to the mounting portion, the stand is front. The stand may be in the guard posture, and the stand may be in the use posture by inserting one end side of the stand from the lower side into the insertion space and pivotally supporting the stand on the mounting portion. Further, the insertion space through which the one end side of the stand of the attachment portion is inserted may be provided with a margin in the front-rear direction so that the one end side of the stand is obliquely inserted.

Further, by rotating the stand around the pivotal support part, the stand may be made to be changeable between a stand use posture and a front guard posture.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. 1 to 14 show the first embodiment. In FIG. 1, reference numeral 1 denotes a tractor, and a vehicle body 2 of the tractor has a front engine 4 covered with a hood 3 and the engine 4. It is mainly composed of a transmission case 5 connected to the rear part. The transmission case 5 is
The engine 4 includes a clutch housing connected to the rear of the engine 4 via a flywheel housing, a transmission case connected to the rear of the clutch housing, and the like.

The tractor 1 is a biaxial tractor in which the tractor body 2 is movably supported by a pair of left and right front wheels 7 (running bodies) and a pair of left and right rear wheels 8 (running bodies). The tractor 1 is a two-wheel drive tractor 1 in which front wheels 7 are steering wheels and rear wheels 8 are drive wheels, or a four-wheel drive tractor 1 in which front wheels 7 are also drive wheels. Also,
In this tractor 1, instead of the left and right rear wheels 8, a crawler belt unit 9 (running body) is attached, so that the tractor vehicle body 2 is movably supported by a pair of left and right front wheels 7 and a pair of left and right crawler belt units 9. It is a semi-track tractor.

The crawler belt unit 9 includes an upper drive sprocket 10 fixed to a rear axle 14, a lower pair of front and rear idlers 11, and a plurality of rolling wheels 12 arranged between the front and rear idlers 11. A drive sprocket 10, an idler 11, and an endless belt-shaped crawler belt 13 wound around a wheel 12 are provided.
By driving 0 to rotate, the crawler belt 13 is circulated. As shown in FIG. 14, the crawler belt 13 is provided with engagement holes 15 which are engaged with the drive sprocket 10 and transmit torque from the drive sprocket 10 to the crawler belt 13 at predetermined intervals in the circumferential direction. ing.

This engaging hole 15 (the center A1 in the left-right direction)
Is formed by being offset by B (1/4 of the tread change width) from the center A2 of the crawler belt 13 in the left-right direction to one side in the left-right direction. This is for attaching the crawler belt 13 upside down so that the tread can be changed as shown by a solid line and an imaginary line in FIG. Accordingly, changing the treads of the left and right crawler belt units 9 does not require a structure in which the left and right crawler belt units 9 are slid in the left and right directions, and the cost can be reduced.

A front axle frame 16 is fixed to the engine 4 so as to project forward from the engine 4, and a central portion of the front axle case in the left-right direction extends in the front-rear direction at a middle portion in the front-rear direction of the front axle frame 16. A front wheel 7 is supported on the left and right sides of the front axle case so as to be swingable around the axis.
Is provided. The front axle frame 16 is mainly configured by connecting front end sides of a pair of left and right side walls 16a by a front wall 16b, and rear end sides of the left and right side walls 16a are fixed to side surfaces of the engine 4 by bolts or the like.

Further, left and right fenders 17 for covering the left and right rear wheels 8 or the left and right crawler belt units 9 are provided at a rear portion of the tractor body 2, and a driver's seat 18 is provided between the left and right fenders 17. A steering wheel 19 is provided in front of the driver's seat 18. 1 to 9, 20
Is a stand for lifting the front part of the tractor vehicle body 2 to lift the front wheels 7 from the ground and maintaining that state when tread adjustment of the left and right front wheels 7 or tire replacement is performed (this is called a front stand. ).

The front stand 20 includes a pair of left and right ground feet 21.
The left and right grounding feet 21 have one end side (base end side, upper end side) detachably attached to attachment portions 23 provided on both left and right front end sides of the front axle frame 16,
The other end side (tip side, lower end side) of the grounding foot 21 is connected to the grounding foot 21.
Are connected by a connecting member 22 integrally extending from the. The connecting member 22 may be formed separately from the grounding feet 21, and may be welded or bolted to each grounding foot 21.

Each of the left and right mounting portions 23 has a front axle frame 16
And a plate 24 fixed to the front axle frame 16 and a front end of the side wall 16a of the front axle frame 16. The plate 24 includes a side wall portion 24a, which is disposed on the front end side of the side wall 16a of the front axle frame 16 so as to be opposed to each other in the left-right direction.
It is formed in an L-shape in a plan view from a rear wall portion 24b connecting the rear end side of 4a and the front axle frame side wall 16a. Further, a pair of upper and lower insertion holes 25 are formed in the side wall portion 24a of the plate 24 and the front axle frame side wall 16a, respectively, and the insertion hole 25 formed in the plate side wall portion 24a,
The through hole 25 formed in the front axle frame side wall 16a is formed concentrically in the left-right direction.

A pair of insertion holes 26 corresponding to the insertion holes 25 are also formed on one end side of the left and right grounding feet 21 of the front stand 20. When the tractor vehicle body 2 is lifted using the front stand 20 and the front wheels 7 are levitated from the ground contact surface D, one end side of the left and right one side ground foot 21 of the front stand 20 is attached to the left and right one side mounting portion 23. Front axle frame side wall 16
a and the plate side wall part 24a, and the one end side of the left and right other side grounding foot 21 is inserted between the front axle frame side wall 16a and the plate side wall part 24a of the mounting part 23 on the left and right other side. It is inserted into the insertion space 28.

The front stand 20 is attached to the mounting portion 23 by inserting the pin 27 into one of the upper and lower sides of the through holes 25, 26 formed at one end of the front axle frame side wall 16a, the plate side wall portion 24a and the grounding foot 21. Is rotatably supported around the axis in the left-right direction, and the other end of the grounding foot 21 is grounded. At this time, as shown in FIGS. 3, 5, and 6, when the front wheel 7 and the rear wheel 8 (or the crawler belt unit 9) are in contact with the ground, the other end of the grounding foot 21 from the pivoting fulcrum is grounded. Since the length to the side is longer than the vertical distance from the pivoting fulcrum of the grounding foot 21 to the grounding surface D (the grounding point of the front wheel 7), the front stand 20 moves downward as it goes forward. The tilted posture is such that

In this state, when the tractor 1 is moved forward by the rear wheels 8 or the like (moves in the direction of arrow E in FIG. 6), the front stand 20 takes the other end side of the grounding foot 21 as a fulcrum from the tilted posture described above. Raises up (swings forward, or rotates rearward relative to the tractor body 2 about a rotation pivot point), whereby the front portion of the tractor body 2 is lifted. As a result, the front wheels 7 float above the ground contact surface D (see FIG. 8), and the tractor vehicle body 2 is supported by the rear wheels 8 and the like and the front stand 20. At this time, in the illustrated example, since the return of the front stand 20 is restricted, the tractor 1 is in a state in which the front stand 20 is in a slightly forward leaning posture from a posture along the vertical direction.
The forward stand 20 is stopped.
The forward movement of the tractor 1 may be stopped in a state in which the posture is along the vertical direction.

It should be noted that the front stand 20 is tilted so that it shifts downward as it goes rearward with the front wheels 7 and the rear wheels 8 (or the crawler belt unit 9) in contact with the ground. The tractor body 2 may be lifted by the front stand 20 by moving backward. Further, when the front stand 20 is not used, the front stand 20 is arranged in the vertical direction with one end side of the front stand 20 as the lower side, and one end side of the ground foot 21 on the left and right side of the front stand 20 is connected to the left and right sides. The side of the front axle frame side wall 16a of the side attachment portion 23 and the plate side wall portion 24a are inserted, and one end of the ground foot 21 on the other side of the left and right sides is attached to the front axle frame side wall 16a of the attachment portion 23 of the other side of the left and right side and the plate. It is inserted between the side wall portion 24a.

Then, the front stand 20 is attached to the mounting portion 23 by inserting the pin 27 into both the upper and lower sides of the front axle frame side wall 16a, the plate side wall portion 24a and the insertion holes 25 and 26 formed at one end side of the grounding foot 21. The mounting part 2
3 is attached so as to project upward. As a result, the front stand 20 functions as a front guard and a weight and secures a storage place. Therefore, the front stand 20 is capable of changing its posture between a use posture that functions as a lift member (vehicle body raising member) and a non-use posture that functions as a front guard (front guard posture).

As shown in FIG. 1, FIG. 3, FIG. 5, FIG. 7 and FIG. 9, the tractor vehicle body 2 is attached to the left and right sides (left side in the illustrated example) of the front portion of the front axle bracket 16 by the front stand 20.
It has a marker device 29 for displaying the lifted state. The marker device 29 is mainly composed of a marker 30 and a support body 31, and the support body 31 is formed of a cylindrical body and is vertically arranged at the rear portion of the outer surface of the mounting portion 23 and welded to the mounting portion 23. Is fixed by. The marker 30 is formed by bending a round bar material, and has a support shaft portion 30a that is rotatably inserted around the vertical axis of the support body 31 and an upper end of the support shaft portion 30a. The display unit 30b extends in a direction substantially orthogonal to the vertical direction, and the contact portion 30c extends from the lower end of the support shaft unit 30a in a direction substantially orthogonal to the vertical direction.

As shown in FIG. 4, the upper end surface of the support 31 is an inclined surface 31a which is cut by a surface inclined with respect to the vertical axis, and the inclined surface 31a is
It is formed so as to incline downward in a direction that shifts outward in the left-right direction as it goes forward, and as shown in FIG.
The display portion 30b of the marker 30 faces the tilt direction that shifts outward in the left-right direction as it goes forward, and the contact portion 30c faces the tilt direction that shifts inward in the left-right direction as it goes forward. There is. In this state, one end of the front stand 20 is pivotally attached to the mounting portion 23,
When the front stand 20 is in a rearward tilted posture before the tractor vehicle body 2 is lifted (vehicle body lifting front posture) as shown in FIGS. 3 and 6, the abutment portion 30c of the marker 30 causes the front stand 20 to move.
It contacts the back surface of the grounding foot 21 (or may be made to face each other with a slight interval).

Then, the tractor body 2 is attached to the front stand 20.
The tractor 1 is moved forward so as to be lifted by the
The abutment portion 30c is relatively pushed rearward by the front stand 20, the marker 30 rotates about the vertical axis, and the display portion 30b gradually faces forward, as shown in FIG. Rocks like. At this time, the display unit 30b swings so as to go up the inclined surface 31a at the upper end of the support 31.

The front stand 20 is shown in FIG.
When it reaches a predetermined set position (position at which the tractor body 2 is completely lifted), the display unit 30b faces forward (the front axle frame side wall 16a and the plate side wall 2 as shown in FIG. 9).
4a) and the front stand 20 can be easily confirmed from the driver's seat 18 at a predetermined set position. The predetermined set position of the front stand 20 is not limited to the position of the present embodiment, and may be, for example, a position where the ground foot 21 is in a state of being along the vertical direction.

Further, in the present embodiment, it is possible to confirm that the front stand 20 is in the predetermined set position when the display section 30b is facing forward. The direction of the present embodiment is not limited, and for example, the display unit 30b may face outward in the left-right direction when the front stand 20 is at a predetermined set position. As described above, in the present embodiment, the lifted state of the tractor vehicle body 2 is set by the marker 30.
This can be easily confirmed from the driver's seat 18. Thus, in order to stop the movement of the front stand 20 at the time of lifting the tractor vehicle body 2, without providing a stopper (contact) for contacting the front stand 20. The marker device 29 is provided because the tractor 1 has a large weight and therefore a large load acts on the stopper, which may damage the stopper.

Further, if the pressing force by the front stand 20 is released, the marker 30 is displayed by its own weight due to its own weight.
b slides down the inclined surface 31a and returns to the original position shown in FIG. The front stand 20 may be mainly configured by one grounding foot, and the front wheels 7 may be lifted one by one. As shown in FIGS. 10 and 11, at the rear of the tractor body 2, a three-point link mechanism 35 for mounting a working machine such as a rotary cultivator in a vertically movable manner is provided. Includes one top link 36 on the upper side and a pair of left and right lower links 37 on the lower side.

The front end side of the top link 36 is attached to a bracket provided on the upper rear surface of the tractor vehicle body 2 through a ball joint so as to be rotatable about an axis in the left-right direction. The side is of the tractor body 2.
Support shaft 3 in the left-right direction via a ball joint at the bottom of the side surface on the rear end side.
It is attached so as to be rotatable around 8 and is supported by the tractor body 2 so as to be vertically swingable. The rear end side of the top link 36 and the rear end sides of the left and right lower links 37 are attached to the working machine. In addition, the left and right lower links 37
Are formed such that the distance in the left-right direction gradually increases toward the rear.

A pair of left and right lift arms 39 are arranged on the rear portion of the tractor body 2. The front end sides of the left and right lift arms 39 are attached to a bracket 40 provided on the rear part of the tractor vehicle body 2 via a support shaft 41 in the left-right direction so as to be integrally rotatable around the axis. An upper end side of a lift rod 42 is pivotally attached to a rear end side of the left and right lift arms 39 so as to be rotatable about an axis in the left and right direction, and a lower end side of the lift rod 42 is a left and right lower link 37.
Is rotatably attached to a middle portion in the front-rear direction so as to be rotatable around an axis in the left-right direction.

Further, the upper end side of the hydraulic cylinder 43 is pivotally attached to the rear end side of the lift arm 39 on the other side of the left and right so as to be rotatable around the axis in the left and right direction. The lower link 37 on the side is pivotally attached to a middle portion in the front-rear direction so as to be rotatable about an axis in the left-right direction. Therefore, by swinging the left and right lift arms 39 up and down, the left and right lower links 37 are integrally swung up and down. Further, on the rear end side of the tractor vehicle body 2, an elevating drive device 44 including a hydraulic cylinder (or other actuator) for vertically swinging the left and right lift arms 39 is provided.

In the present embodiment, the lifting drive device 44 is composed of a single-acting hydraulic cylinder, and the base end side of the cylinder body 44a of the lifting drive device 44 is provided below the rear surface of the tractor vehicle body 2. It is rotatably pivoted about a left-right axis around the mounted bracket 45, and the tip end side of the piston rod 44b of the elevating drive device 44 is rotatable around the left-right axis around the middle of the lift arm 39. Is pivotally attached to. In this elevating / lowering drive device 44, the control valve is switched so that pressure oil is supplied from the hydraulic pump to the cylinder body 44a, whereby the piston rod 44b moves in the protruding direction by the movement of the piston in the cylinder body 44a. Then, the lift arm 39 is swung upward, and the left and right lower links 37 are swung upward via the lift rod 42 and the hydraulic cylinder 43 to switch the control valve to the neutral position. When the control valve is switched so that the lift arm 39 and the lower link 37 are stopped and the pressure oil is discharged from the cylinder body 44a, the pressure oil is discharged from the cylinder body 44a due to the weight of the working machine, the lower link 37 and the like. Lower link 3
7 is configured to lower, and left and right lower links 3
7 is a predetermined range (cylinder body 44a of the lifting drive device 44)
It is configured to swing up and down within the moving range of the piston in the inside).

Further, in the lifting drive device 44,
Piston and piston rod 44 in the cylinder body 44a
The lower link 37 is not connected to b, and when the lower link 37 is lifted by hand, the lower link 37 swings upward. 10 to 13, reference numeral 48 denotes the rear wheel 8.
Alternatively, at the time of adjusting the tread of the crawler belt unit 9 or replacing the crawler belt unit 9, the rear portion of the tractor vehicle body 2 is lifted to lift the rear wheel 8 or the crawler belt unit 9 from the ground contact surface D and to maintain the state (this It is called the rear stand).

After this, the stand 48 is pivotally supported by the tractor vehicle body 2 so as to be rotatable about an axis in the left-right direction.
And a pair of left and right grounding feet 50 detachably attached to the pivotal support 49. The ground foot 50 is
One may be provided, or three or more may be provided. Also,
The ground foot 50 may be fixed to the pivot portion 49 by welding or the like. The pivot 49 is composed of a cylindrical body,
It is arranged between a pair of left and right brackets 51 provided on the lower side of the rear end of the tractor vehicle body 2.
A bracket 51 is rotatably supported around a shaft center in the left-right direction via a pivot shaft 52 inserted in the pivot portion 49.

A pair of left and right holders 53 are provided on the lower side of the pivot portion 49, and each of the holders 53 has a grounding foot 5
One end side (base end side, upper end side) of 0 is detachably attached by a bolt or the like, and the other end side (tip side, lower end side) of the grounding foot 50 is grounded. The holder 53 is fixed to the pivot portion 49 so as to project outward in the radial direction and in an inclined shape that shifts outward in the left-right direction as it goes outward in the radial direction. The distance is gradually increased toward the end.

An interlocking body 55 is fixed to a pivotal support 49 of the rear stand 48. The interlocking body 55 is formed in a V shape in a side view, and a front end side of the interlocking body 55 is a pivotal support portion 49 of the rear stand 48.
Is provided with an arm portion 56 that is fixed by welding or the like and integrally rotates with the rear stand 48, and an engagement portion 57 that engages over the left and right lower links 37 is provided on the rear end side of the arm portion 56. Has been. The engaging portion 57 is formed of a bar material and is projected outward from the arm portion 56 in both left and right directions. The portion protruding from the arm portion 56 slides on the lower surface side of the left and right lower links 37. It is engaged by movably abutting.

As shown in FIG. 10, front wheels 7 and rear wheels 8
When the (or crawler belt unit 9) is grounded, the length from the pivoting fulcrum of the grounding foot 50 to the other end side is
Since it is longer than the vertical distance from the pivoting fulcrum of the grounding foot 50 to the grounding surface D, the rear stand 48 is in an inclined posture so as to move downward as it goes forward. At this time, the left and right lower links 37 are located at the lowered position (the lower side of the swing range), and the interlocking body 55
The engaging portion 57 of is in contact with the lower side of the left and right lower links 37.

From this state, when the tractor 1 is moved forward by the front wheels 7 (moves in the direction of arrow E in FIG. 6), the rear stand 48 rises from the tilted posture described above with the other end of the grounding foot 50 as the fulcrum. (While swinging forward or rotating relatively rearward with respect to the tractor body 2 about a rotation pivot), the tractor body 2
The rear part is lifted so that the rear wheels 8 and the like float above the ground contact surface D. Further, at this time, the interlocking body 55 rotates upward together with the rear stand 48 to push up the left and right lower links 37.

When the rear part of the tractor vehicle body 2 is lifted by the rear stand 48, the lower link 37 is positioned at the upper limit of its swinging range and the rotation of the interlocking body 55 is restricted. The rotation of 48 is stopped. When lowering the tractor body 2, the tractor 1 may be moved backward by the front wheels 7. Further, in the above-mentioned structure, the rear stand 4
When the front wheel 7 and the rear wheel 8 (or the crawler belt unit 9) are in contact with the ground, 8 is inclined so that the front wheel 7 and the rear wheel 8 (or the crawler belt unit 9) move downward as it goes rearward, and the tractor 1 is moved backward to move the rear stand 48 Alternatively, the tractor body 2 may be lifted.

In this case, if the interlocking body 55 is made to rotate integrally with the rear stand 48, the interlocking body 55 is rotated by the front stand pivoting with respect to the tractor vehicle body 2.
Since the lower link 37 is rotated downward, the lower link 37 is placed at the lower limit position of its swing range, and the rear stand 4
When the rear part of the tractor vehicle body 2 is lifted by 8, the engaging part 57 of the interlocking body 55 contacts the lower link 37 to restrict the rotational movement of the rear stand 48, or Rear stand 4 by moving 1 backwards
A motion converting mechanism is provided between the rear stand 48 and the interlocking body 55 so that the interlocking body 55 pivots upward and pushes up the lower link 37 when the 8 rotates forward with respect to the tractor vehicle body 2.

Further, the pivotal support 49 of the rear stand 48 is located rearward of the pivotal fulcrum on the front end side of the lower link 37, and the interlocking body 55 is provided so as to project forward from the pivotal support 49. By rotating the stand 48 forward with respect to the tractor body 2, the lower link 37 is moved by the interlocking body 55.
May be configured to be pushed up, and the interlocking body 55 is interlocked with the rotation operation of the rear stand 48 with respect to the tractor body 2.
When the tractor vehicle body 2 is lifted by rotating the interlocking body 55, the interlocking body 55 moves the lower link 37 located at the end of the swing range.
It suffices that the rear stand 48 is stopped from rotating by engaging with the.

When the tractor body 2 is lifted by the rear stand 48 and the rear wheels 8 and the like are levitated,
The left and right grounding feet 50 may raise the left and right rear wheels 8 and the like at the same time, but it is also possible to attach only the left and right grounding feet 50 and raise the left and right rear wheels 8 and the like one by one. In this case, only one grounding foot 50 may be prepared, and this one grounding foot 50 may be replaced with the left and right holders 53. Further, when the rear stand 48 is not used, the grounding foot 50 is removed from the holder 53, and the pivotal support 49 and the interlocking body 55 are left as they are, so that a large storage space is not required. The pivot support 49 may be removed from the bracket 51, and the rear stand 48 and the interlocking body 55 may be removed.

When the lower link 37 is pushed up by the rotation of the interlocking body 55, the engaging portion 57 of the interlocking body 55 is interlocked with the lower link 37 so as to be relatively movable. The lower link 37 may be engaged, or the interlocking body 55 may be engaged with the left and right lower links 37 so that the lower link 37 is pushed up by the rotation of the interlocking body 55. Also, the rotation axis of the rear stand 48 and the lower link 3
The rear stand 48 may be rotated about the same axis as the lower link 37 by making the swing axis of 7 coincide.
In this case, the rear end side of the interlocking body 55 may be connected and fixed to the lower link 37.

On the rear side of the tractor vehicle body 2, a marker device having substantially the same mechanism as the marker device 29 on the front portion of the tractor 1 described above is provided so that the rear stand 48 lifts the rear portion of the tractor vehicle body 2. Alternatively, it may be easily confirmed from the driver's seat 18. 15 to 19
Shows the second embodiment, and the stand 60 is composed of a main stand 61 having a long length and a sub stand 62 having a short length. By changing the length of the stand 60, the tractor can be changed. It is configured so that it can be used (differently used) when it is used to lift the front part of the vehicle body 2 and when it is used to lift the rear part of the tractor vehicle body 2.

In the tractor 1 of this embodiment,
A weight mounting frame 63 is provided on the front end side of the front axle frame 16, and mounting parts 64 for mounting the stand 60 are provided on both left and right sides of the weight mounting frame 63. The main stand 61 includes a pair of left and right grounding feet 65 formed of a tubular body.
One end side (base end side, upper end side) of 5 is detachably attached to the attachment portion 64, and the other end side (tip end side, lower end side) of the grounding foot 65 is connected by a connecting member 66.

The sub stand 62 includes a pair of left and right connecting feet 6
7, each of the left and right connecting legs 67 has a cylindrical body 67a.
And an insertion member 67 fixed to one end side of the cylindrical body 67a.
and the left and right insertion members 67b are inserted into one end of the left and right main stands 61, and the insertion members 67b
The sub stand 62 can be connected to the main stand 61 by penetrating the pin 68 across the main stand 61 and fixing the insertion member 67b to the main stand 61 so as not to come off. Further, a pair of left and right mounting plates 69 are fixed to the other end side of each connecting leg 67 of the sub stand 62, and the mounting plate 69 on the inner side in the left-right direction provided on each connecting leg 67 is a connecting member. They are connected by 70.

Further, the left and right mounting plates 69 of each of the connecting legs 67
A work machine connecting portion on the rear end side of the lower link 37 can be inserted between the work machine connecting portions, and the work machine connecting portion is pivoted on the left and right mounting plates 69 by the connecting pins 71 about the axis in the left-right direction. It can be pivotally connected freely. The weight mounting frame 63 includes a main frame member 72 formed in a U-shape that is open rearward in a plan view from the left and right side walls 72a and a front wall 72b that connects the front ends of the left and right side walls 72a. The left and right side walls 72a are connected to each other, and the reinforcing frame member 73 is fixed to the front end side of the front axle frame 16.

Each of the left and right mounting portions 64 includes a main stand mounting portion 75 and a sub stand mounting portion 76. The main stand mounting portion 75 is composed of a U-shaped plate 77 and the side wall 72a of the weight mounting frame 63, and the sub stand mounting portion 76 is composed of a cylindrical body arranged in the vertical direction. The U-shaped plate 77 is laterally opposed to the side wall 72a of the weight mounting frame 63, and extends inward in the left and right direction from the front and rear of the side wall 77a and is welded to the side wall 72a of the weight mounting frame 63. The front and rear walls 77b and 77c are fixed to each other to form a U-shape that is open in the left-right direction in plan view. The U-shaped plate 77 and the side wall 7 of the weight mounting frame 63 are formed.
2a, the main stand mounting portion 75 is formed in a vertically open tubular shape, and the inside of the main stand mounting portion 75 serves as an insertion space 78 for inserting one end side of the ground foot 65 of the main stand 61. There is.

When the main stand 61 is not used, the main stand 61 is arranged vertically with one end side of the main stand 61 facing downward.
While inserting one end side of the grounding foot 65 on the left and right sides into the insertion space 78 of the main stand mounting portion 75 on the left and right side,
One end of the grounding foot 65 on the other side of the left and right is inserted into the insertion space 78 of the main stand mounting portion 75 on the other side of the left and right. Then, by inserting a pair of upper and lower pins 68 into the side wall 72a of the weight mounting frame 63, the plate side wall 77a, and one end of the grounding foot 65, the main stand 61 is projected to the main stand mounting portion 75 and upward from the mounting portion 75. Attach as a shape.

As a result, the main stand 61 functions as a front guard and a weight and secures a storage place. Further, when the sub stand 62 is not used, the sub stand 62 is arranged in the vertical direction with one end side of the connecting foot 67 of the sub stand 62 being the lower side, and the insertion member 67b of the sub stand 62 is
The sub-stand 62 is attached to the sub-stand attaching portion 76 as a projecting upward from the attaching portion 76 by inserting the sub-stand attaching portion 76 from above and preventing it from coming off with a pin or the like.

As a result, the sub stand 62 also functions as a front guard and a weight, and a storage space is secured. In the stand 60 having the above structure, only the main stand 61 is used when the front part of the tractor body 2 is lifted, and the main stand 6 is used when the rear part of the tractor body 2 is lifted.
1 is used by connecting the sub stand 62. When the tractor vehicle body 2 is lifted and the front wheels 7 are levitated from the ground contact surface D, the ground feet 65 on one of the left and right sides of the main stand 61.
One end side of each of the right and left sides is inserted into the insertion space 78 of the main stand mounting portion 75, and one end side of the left and right other side ground feet 65 is inserted into the insertion space 78 of the left and right other side main stand mounting portions 75.

Then, the side wall 72 of the weight mounting frame 63
a, the side wall 77a of the plate, and one end 68 of the grounding foot 65, one pin 68 penetrates the main stand 6
1 is rotatably supported on the main stand mounting portion 75 about the axis in the left-right direction, and the other end of the grounding foot 65 is grounded. At this time, like the front stand 20 of the first embodiment, the main stand 61 is in a tilted posture so as to move downward as it goes forward.

Therefore, the insertion space 78 is provided with an allowance (play) in the front-rear direction in order to insert one end side of the main stand 61 at an angle. From the above state, the tractor 1
When the vehicle is moved forward by the rear wheels 8 and the like, the main stand 61 rises from an inclined posture and stands up, and the front portion of the tractor body 2 is lifted and the front wheels 7 are moved, as in the front stand 20 of the first embodiment. The tractor vehicle body 2 floats above the ground contact surface D and is supported by the rear wheels 8 and the like and the main stand 61. Therefore, the main stand 61 is capable of changing its posture between a use posture that functions as a lift member (vehicle body raising member) and a non-use posture that functions as a front guard (front guard posture).

Also in the present embodiment, the marker device 29 for displaying the state where the tractor body 2 is lifted by the main stand 61 is provided. Since this marker device 29 has the same configuration and function as the above-mentioned marker device 29, the description thereof will be omitted. Further, when the tractor vehicle body 2 is lifted and the rear wheel 8 or the crawler belt unit 9 is levitated from the ground surface D, the sub stand 62 is connected to the main stand 61 and the piston of the lifting drive device 44 is connected, as shown in FIG. By projecting the rod 44b, the left and right lower links 37 are set to the upper limit position of the swing range, and the one mounting plate 69 of the left and right connecting legs 67 of the sub stand 62 is
One of the left and right lower links 37 is pivotally connected to the work machine connecting portion on the rear end side, and the other mounting plate 69 of the left and right connecting foot 67 is pivotally connected to the work machine connecting portion on the rear end side of the other left and right lower link 37. Then, the other end of the main stand 61 is grounded.

In this state, as shown by the solid line in FIG. 19, when the rear wheel 8 (or crawler belt unit 9) is in contact with the ground, the length from the rotation pivot point of the stand 60 to the other end side is increased. From the rotation pivot of the stand 60 to the ground plane D
Since it is longer than the distance in the vertical direction to (the ground contact point of the rear wheel 8 or the like), the stand 60 is in a tilted posture so as to shift downward as it goes rearward. When the tractor 1 is moved backward (moved in the F direction shown by the arrow in FIG. 19) from this state by the front wheels 7 or the like, the stand 60 rises up from the above-described tilted posture with the ground contact side as a fulcrum (swing backward, Or, it stands up by rotating forward relative to the tractor body 2 about the pivotal fulcrum), whereby the rear portion of the tractor body 2 is lifted and the rear wheels 8 and the like float above the ground contact surface D. However, the tractor body 2 is supported by the front wheels 7 and the stand 60.

A marker device for displaying the lifted state of the rear wheel 8 or the like by the stand 60 may be provided.
Further, the stand 60 may be made extendable by providing the sub stand 62 on the main stand 61 so as to be movable and fixed in the length direction. FIG. 20 shows another example of the rear stand 80. One end side of the rear stand 80 is pivotally connected to a bracket 81 provided at the rear part of the tractor vehicle body 2 so as to be rotatable about an axis in the left-right direction. Then, the other end side of the rear stand 81 is grounded so that the rear stand 81 is inclined so as to move downward as it goes rearward, and in this state, the tractor 1 is moved backward.
The rear stand 81 lifts the rear side of the tractor body 2.

FIG. 21 shows another example of the front stand 82, in which one end side of the front stand 82 is pivotally attached to the front end side of the front axle frame 16 so as to be rotatable about an axial center in the left-right direction. By vertically swinging and supporting the stand 82 around the pivotally supporting portion 83, a stand use posture (shown by phantom lines) that functions as a lifter member and a non-use posture (solid line) that functions as a front guard. It is possible to change the posture. In this example, when the front stand 82 is in a non-use posture that functions as a front guard and a weight, a means for positioning and fixing the front stand 82 at the position (for example, the front stand 82 and the front axle frame 16). A pin) which penetrates through.

[0057]

According to the present invention, a tractor body movably supported by a traveling body is provided with a lower link that can be vertically swung within a predetermined range, and a stand that supports the tractor body in a lifted state. The upper part is rotatably supported by the tractor body and the lower part is grounded. By moving the tractor forward and backward from the grounded state of the traveling body, the stand rotates relative to the tractor body. Since the tractor body is lifted by the stand and the traveling body is levitated,
The tractor body can be easily lifted at the required place.

In addition to interlocking with the turning operation of the stand, while the traveling body is levitated, the lower link located at the end of the swing range is engaged to stop the turning operation of the stand. Since the interlocking body is provided, it is not necessary to separately provide a stopper for restricting the rotation of the stand, and thus the stand can be provided at low cost. In addition, the upper part is provided with a stand that is rotatably supported by the tractor body movably supported by the traveling body and the lower part is grounded, and the tractor is moved forward and backward from the state where the traveling body is grounded. By rotating the stand relative to the tractor body,
Alternatively, by forcibly rotating the stand with respect to the tractor vehicle body by the power of the actuator, the tractor vehicle body is lifted by the stand and the traveling body is levitated. Can be lifted.

Further, by providing the marker for displaying the state where the tractor body is lifted by this stand, the state where the tractor body is lifted by the stand can be easily confirmed from the driver's seat. Further, if a stopper is provided to restrict the rotation of the stand by abutting the stand when the tractor vehicle body is lifted, the tractor has a large weight, which may damage the stopper. There is no such thing as a way to check by.

Further, a mounting portion is provided at the front part of the tractor body movably supported by the traveling body, and a stand having one end rotatably pivotally supported and the other end grounded is mounted on the mounting portion. By moving the tractor forward and backward from the state where the body is in contact with the ground, the stand rotates relatively to the tractor body, and the tractor body is lifted by the stand to levitate the traveling body. , The tractor body can be easily lifted at the required place. When the stand is not in use, the stand can be attached to the mount so as to project upward from the mount so that the stand can function as a front guard, thereby ensuring a storage space when the stand is not in use. In addition to being able to do it, the stand can be used as a front guard when not in use, which is convenient.

Further, the mounting portion has an insertion space through which one end side of the stand can be inserted from both above and below, and one end side of the stand is inserted from above into this insertion space and fixed to the mounting portion.
Alternatively, by inserting one end side of the stand from the lower side into the insertion space and pivotally supporting the stand on the mounting portion, the position of the stand can be changed between the use position and the front guard position. Further, by rotating the stand around the pivotal support, the stand can be changed to the stand use posture and the front guard posture, so that the posture of the stand can be easily changed and the structure can be simplified.

[Brief description of drawings]

FIG. 1 is a side view of a tractor according to a first embodiment.

FIG. 2 is a front view of the stand when not in use.

3A is a plan view of a mounting portion of the stand, and FIG. 3B is a side view of a mounting portion of the stand.

FIG. 4 is a cross-sectional view taken along the line C-C of FIG.

FIG. 5 is a perspective view showing a state of the stand before lifting the vehicle body.

FIG. 6 is a side view showing a state of the stand before lifting the vehicle body.

FIG. 7A is a plan view of a mounting portion of a stand,
(B) is a side view of the attachment part of a stand.

FIG. 8 is a side view showing a state in which a front part of the tractor is lifted.

FIG. 9A is a plan view of a mounting portion of a stand,
(B) is a side view of the attachment part of a stand.

FIG. 10 is a side view of a lift device that lifts a rear portion of the tractor.

FIG. 11 is a rear view of the lift device for lifting the rear part of the tractor.

FIG. 12 is a perspective view of a stand and an interlocking body.

FIG. 13 is a side view showing a state in which a rear portion of the tractor is lifted.

FIG. 14 is a rear sectional view of the crawler belt unit.

FIG. 15 is a side view of the tractor according to the second embodiment.

FIG. 16 is a side view of a mounting portion of a stand.

FIG. 17 is a plan view of a mounting portion of a stand.

FIG. 18 is a front view of the stand.

FIG. 19 is a side view showing a lifted state of the rear portion of the tractor.

FIG. 20 is a side view showing another example of the rear stand.

FIG. 21 is a perspective view showing another example of the front stand.

[Explanation of symbols]

2 tractor body 7 front wheels (running body) 8 Rear wheels (running body) 9 Track unit (running body) 20 stand 23 Mounting part 30 markers 37 Lower Link 44 Actuator (elevation drive device) 48 stand 49 pivotal branch 50 grounded feet 55 interlocking body 64 mounting part 78 insertion space

Continued front page    (72) Inventor Hiroshi Imura             64 Ishizukitamachi, Sakai City, Osaka Prefecture Kubo Co., Ltd.             Ta Sakai Factory (72) Inventor Takashi Gogenya             64 Ishizukitamachi, Sakai City, Osaka Prefecture Kubo Co., Ltd.             Ta Sakai Factory F-term (reference) 3D026 EA08 EA14 EA18 EA53 EA73                       EA84

Claims (6)

[Claims] 1. A tractor vehicle body movably supported by a traveling body includes a lower link that can be vertically swung within a predetermined range, and a stand that supports the tractor vehicle body in a lifted state. Is rotatably pivoted to the lower part and the lower part is grounded, and by moving the tractor forward and backward from the state where the traveling body is grounded, the stand rotates relatively to the tractor vehicle body, The tractor is constructed so that the vehicle body is lifted to levitate the traveling body, and it is interlocked with the rotating operation of this stand, and while the traveling body is levitated, it engages the lower link located at the end of the swing range. A lift device for a tractor, further comprising: an interlocking body for stopping the rotating operation of the stand. 2. A stand, the upper part of which is rotatably supported by a tractor vehicle body movably supported by a traveling body, and the lower part of which is grounded, and the tractor is moved in the front-rear direction from a state where the traveling body is grounded. The tractor body is lifted by the stand and traveled by advancing and rotating the stand relative to the tractor body, or by forcibly rotating the stand with respect to the tractor body by the power of the actuator. A lift device for a tractor, which is configured to raise a body, and is provided with a marker that indicates a state in which the tractor vehicle body is lifted by the stand. 3. A tractor vehicle body movably supported by a traveling body is provided with a mounting portion at a front portion thereof, and the mounting portion is provided with a stand having one end pivotally supported and the other end grounded. By moving the tractor forward and backward from the state in which the body is in contact with the ground, the stand rotates relatively to the tractor body, and the tractor body is lifted by the stand to levitate the traveling body. The lift device for a tractor, wherein the stand is attached to the mounting portion so as to project upward from the mounting portion when the stand is not used, and the posture thereof can be changed to a posture that functions as a front guard. 4. The mounting portion has an insertion space into which one end side of the stand can be inserted from both above and below, and the one end side of the stand is inserted into the insertion space from above to fix the stand to the front portion. 4. The stand is in a guard posture, and is configured such that the stand is in a use posture by inserting one end side of the stand into the insertion space from below and pivotally supporting the mounting portion. Tractor lift equipment. 5. The insertion space of the mounting portion, through which one end side of the stand is inserted, the one end side of the stand is obliquely inserted,
The tractor lift device according to claim 4, wherein a margin in the front-rear direction is provided. 6. The lift device for a tractor according to claim 3, wherein the stand can be changed into a stand use posture and a front guard posture by rotating the stand around a pivot.