JP2002262605A - Connecting structure of implement unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a connecting structure of an implement unit designed so that an excessive load is not applied to a driving shaft for transmitting a power to the implement unit and misalignment is not caused in the driving shaft when the implement unit is separated in the connecting structure of the implement unit for a sulky working machine in which the implement unit is freely detachably connected through connecting parts to a connecting beam for the working machine mounted on the rear end of a lifting and lowering mechanism provided at the rear of the sulky working machine. SOLUTION: This connecting structure is obtained by respectively composing the connecting parts 21 of a first nipping body 34 for nipping the connecting beam 12 for the working machine, a second nipping body 33 and a nipping and fixing tool 35 installed between the first nipping body 34 and the second nipping body 33 and further arranging a rolling roller 36 in contact with the upper sidewall 12c of the connecting beam 12 for the working machine in the nipping and fixing tool 35.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a riding work machine in which a working machine such as a rotary cultivator can be arranged via a lifting mechanism at the rear of a riding work machine provided with a driver's seat on which an operator operates. In the above, the working machine is configured by connecting the working unit to a working machine connecting beam for connecting to a lifting mechanism at the rear of the riding work machine, and connecting the working unit to the working machine connecting beam. It is about structure.

[0002]

2. Description of the Related Art Conventionally, a driver's seat on which an operator rides and operates is provided, and a lifting and lowering mechanism is provided at a rear portion of a riding work machine capable of self-propelling, and a working machine connecting beam is provided on the lifting and lowering mechanism. The work machines are connected so that work can be performed by the work machines. That is, when the working machine is a rotary cultivator, the riding machine can be used as a riding tractor.
Various work can be performed by the riding work machine of one stand.

In this case, the working machine requires a working machine connecting beam for connection to the lifting mechanism, and a power transmission mechanism for transmitting the power of the engine of the riding work machine to the working machine. Therefore, the working machine is configured by the working machine connecting beam, the power transmission mechanism, and the working unit.

In such a working machine, for example, in the case of a rotary cultivator, there is a rotary cultivator in which a plurality of rotary cultivating units are connected to a working machine connecting beam to form one rotary cultivator. The tilling area can be adjusted by adjusting the interval between the tilling units.

In this case, each rotary tillage unit
The drive sprocket of the rotary tilling unit is attached to the drive shaft extended from the power transmission mechanism to transmit power to the rotary tilling unit. With such a configuration, each rotary tilling unit By adjusting the distance between the tillers, power can be transmitted reliably even if the arrangement position of the rotary tillage unit is displaced.

[0006]

However, when power is obtained from the drive shaft extended from the power transmission mechanism, the rotary tilling is required to adjust the interval between the rotary tilling units. When the unit is detached from the work equipment connecting beam, the rotary tillage unit may hang on the drive shaft, and an excessive load acts on the drive shaft, causing the drive shaft to misalign. There is a problem that may occur.

[0007]

In order to solve the above problems, according to the present invention, a working unit connecting beam attached to a rear end of a lifting mechanism provided at a rear portion of a riding work unit is connected to a working unit via a connecting unit. In the connecting structure of the working unit of the riding work machine, the connecting portion includes a first holding body for holding the working machine connecting beam, a second holding body, and the first holding body and the second holding body. It is constituted by a holding fixture mounted between the body and the body, and further, a rolling roller is provided on the holding fixture so as to contact the upper side wall of the working machine connecting beam.

In particular, the work machine connecting beam is a quadrangular prism extending in the left-right direction of the riding work machine. The first clamp is brought into contact with a front side wall of the quadrangular prism and the second clamp is attached to a rear side wall. To abut the work machine connecting beam, and a rolling roller provided on a holding fixture provided above the upper side wall of the quadrangular prism body is brought into contact with the upper side wall.

Therefore, when the connection between the working unit and the working unit connecting beam is released at the connecting part of the working unit in order to adjust the interval between the working units, the working unit is suspended on the working unit connecting beam via the rolling rollers. Since the drive shaft can be lowered, it is possible to prevent an excessive load from acting on the drive shaft.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the present invention, a working machine attached to a rear end of a lifting mechanism provided at a rear portion of a riding work machine is constituted by a working machine connecting beam and a working unit, and the working unit is connected to the working machine by a connecting portion. The connecting beam is detachable from the connecting beam. In particular, the connecting portion is formed by a first holding member, a second holding member, and a holding fixture provided between the first holding member and the second holding member. The work unit is connected by holding the working machine connecting beam between the first holding body and the second holding body, and further, a holding fixture positioned above the working machine connecting beam. And a rolling roller which is in contact with an upper side wall of the working machine connecting beam.

Therefore, when the work unit connection beam is once released from being held by the connecting portion in order to change the attachment position of the work unit to the work machine connection beam, the work unit is moved to the work machine connection beam by the rolling rollers. In this state, the work unit is suspended, and the weight of the work unit is supported by the work equipment connection beam. Therefore, it is possible to prevent an excessive force from acting on the drive shaft that transmits power to the work unit, and to prevent the drive shaft from being misaligned.

Further, since the working unit is locked to the working machine connecting beam via the rolling roller, the working unit can be easily moved along the working machine connecting beam by rolling the rolling roller. The working unit can be reliably positioned and attached to the required position.

[0013] In particular, the work machine connecting beam is a quadrangular prism extending in the left-right direction of the riding work machine, the first sandwiching body is brought into contact with the front side wall of the square pillar, and the second sandwiching body is brought into contact with the rear side wall. The work machine connecting beam is held in contact therewith, and a rolling roller provided on a holding fixture provided above the upper side wall of the quadrangular prism body is brought into contact with the upper side wall.

Accordingly, the contact area between the rolling roller and the work equipment connecting beam can be increased, so that the load per unit area can be reduced, and the rolling roller can be easily rolled. This makes it easy to move the work unit.

When the work unit is moved, the first
Since the work unit can be moved along the work equipment connecting beam because it is regulated by the holding body and the second holding body, it is possible to prevent a load from acting on the drive shaft when the work unit is moved. Work can be done with peace of mind.

Here, the working unit is a rotary tilling unit for performing a tilling operation, a transplanting unit for performing a transplanting operation, or the like, and is linked to a drive shaft as described later. Things. Therefore, the work can be switched by replacing only the working unit instead of replacing each work equipment connection beam, and the cost can be reduced by sharing the work equipment connection beam.

In particular, the work of replacing the work unit, which is lighter than the work machine, may be performed in accordance with the required work, so that the work of replacement can be facilitated.

Hereinafter, embodiments of the present invention will be described in more detail with reference to the drawings. In particular, although the working unit is a rotary tilling unit in the following embodiments, the working unit is not limited to this, and various working units can be mounted as needed.

[0019]

1 is a side view of a rotary tilling unit A of a riding work machine B provided with a rotary tilling unit A, and FIG. 2 is a plan view of the same. However, in FIG.
For convenience of explanation, the rotary portion C of the rotary tillage unit A is drawn backward and drawn.

Although only the rear end portion of the riding work machine B is shown, a pair of left and right or one front wheel is disposed in front of the vehicle body frame and a pair of left and right rear wheels is located rearward, similarly to the conventional riding work machine. 1, an operation unit such as a steering wheel, a seat unit composed of a seat, a motor unit 2 such as an engine and a transmission case are provided on the upper surface of the body frame from the front, and the power of the motor unit 2 is supplied to the rear wheels 1 and Or it is transmitted to the front wheels so that it can run on its own.

The power of the prime mover unit 2 is transmitted to the first power transmission mechanism 3 by a first power transmission mechanism 3, a second power transmission mechanism 4, and a third power transmission mechanism 5 each having a connecting chain.
To the second power transmission mechanism 4, and from the second power transmission mechanism 4 to the third power transmission mechanism 5. And
A unit drive shaft 8 is connected to both ends of the rotation shaft 7 of the driven sprocket 6 of the third power transmission mechanism 5, and the unit drive shaft 8 extends to both left and right sides of the third power transmission mechanism 5, and the power of the prime mover unit 2 is increased. Drives the unit drive shaft 8 to rotate.

A lifting mechanism 9 is provided behind the riding work machine B.
The work machine connecting beam 12 is pivotally connected to the rear end of the lower link 10 of the lifting mechanism 9 via a pivot 11. In the elevating mechanism 9, the elevating cylinder 13 is used.
By expanding and contracting and rotating the lift arm 14,
The lower arm 10 operatively connected to the lift arm 14 is rotated by the connecting arm 15. further,
The working machine connecting beam 12 has a top link connecting plate 16 protruding upward, and the rear end of the top link 17 is connected to the top link connecting plate 16 so that the lower link can be extended and contracted by the lifting cylinder 13. With the rotation of 10, the work implement connecting beam 12 can be rotated about the pivot 11 as the center of rotation.

The work machine connecting beam 12 is a quadrangular prism extending in the left-right direction of the riding work machine B, and has a rectangular front side wall 12a, a rear side wall 12b, and an upper side wall 12c, respectively.
The lower side wall 12d forms a hollow quadrangular prism. The top link connecting plate 16 is disposed on the upper side wall 12c as described above, and a power transmission mechanism support plate 18 for supporting the rear end of the third power transmission mechanism 5 is disposed. The third power transmission mechanism 5 is rotatably disposed on the support plate 18, and the working machine connection beam 12 is operated by operating the lifting cylinder 13.
With the rotation of the third power transmission mechanism 5, the third power transmission mechanism 5 also rotates. That is, the relative position of the unit drive shaft 8 extending from the third power transmission mechanism 5 substantially parallel to the work equipment connection beam 12 with respect to the third power transmission mechanism 5 is determined by the rotational movement of the work equipment connection beam 12. So that it doesn't change with time.

The rotary tilling unit A includes a rotary section C, a power transmission section 19 for interlockingly connecting the rotary section C and the unit drive shaft 8, a support frame 20 for supporting the power transmission section 19, The connecting frame 21 is provided at the front end of the support frame 20 and connects to the working machine connecting beam 12.

The power transmission unit 19 includes a driving sprocket 22 and
Driven sprocket (not shown) and driven sprocket
It is composed of a connection chain 24 wound around a 22 and a driven sprocket, and a chain case 25.

The driving sprocket 22 and the driven sprocket are rotatably mounted on a chain case 25. The drive sprocket 22 has a drive shaft fitting hole 26 into which the unit drive shaft 8 is fitted.
In this embodiment, the unit drive shaft 8 has a hexagonal column shape, the drive shaft insertion hole 26 has a substantially hexagonal opening corresponding to the hexagonal column shape, and the drive sprocket 22 is securely rotated with the rotation of the unit drive shaft 8. It can be rotated. Further, connecting shafts 27 for mounting the rotary part C are respectively provided at both ends of a rotating shaft (not shown) of the driven sprocket which rotates in conjunction with the rotation of the driving sprocket 22 by the connecting chain 24. .

The rotary part C is a tilling claw having a required shape.
And a cultivating claw support shaft 29 in which the plurality of cultivating claws 28 are arranged in a required pattern. In particular, the tilling claw support shaft
29 has an insertion hole into which the above-described connection shaft 27 is inserted, and the tilling claw support shaft 29 is attached to the connection shaft 27 so that the connection shaft 27 is inserted into the insertion hole, and the fixing pin 30 is used. The tilling claw support shaft 29 and the connection shaft 27 are connected and fixed. Thereby, with the rotation of the unit drive shaft 8,
The rotary part C can be rotated.

The support frame 20 is a frame extending in the front-rear direction. The support frame 20 supports the power transmission section 19 in a fixed state and supports the power transmission section 19, and also attaches a cover body 31 or auxiliary wheels (not shown). I can do it.

Further, connecting arms 32, 32 are provided extending on the left and right sides of the support frame 20 in the forward direction, and a connecting portion 21, which is a main part of the present invention, is provided at the tip of the connecting arms 32, 32. I have to.

The connecting portion 21 includes a second holding body 33 connected to the distal ends of the connecting arms 32, 32, a first holding body 34 disposed opposite to the second holding body 33, and a first holding body 34. A holding fixture 35 erected between the holding body 34 and the second holding body 33;
The rolling roller 36 is rotatably mounted around the shaft 35. In this embodiment,
The holding fixture 35 is constituted by a fixing bolt 35a and a fixing nut 35b. The holding fixture 35 is not limited to the configuration of the fixing bolt 35a and the fixing nut 35b, but may have another configuration.

The second holding body 33 is bent in the middle to form a substantially U-shape in side view, and a rear side wall receiving portion 33b that overlaps with the rear side wall 12b of the working machine connecting beam 12; Lower wall receiving part 3 that overlaps with lower wall 12d of
It is a metal plate provided with 3d. Furthermore, the lower side wall receiving portion 33
The front end of d is bent downward to form a direct joining portion 33e that is directly joined to the first holding member 34.
The second holding body 33 is provided with an insertion hole at a required position where the fixing bolt 35a of the holding fixture 35 is inserted.

The first holding body 34 is a flat metal plate, and has an insertion hole for inserting a fixing bolt 35a of the holding fixture 35 at a required position.

The rear side wall receiving portion 33b of the second holding body 33 configured as described above is brought into contact with the rear side wall 12b of the work equipment connecting beam 12, and the lower side wall receiving portion 33 of the second holding body 33 is provided.
d is brought into contact with the lower side wall 12d of the working machine connecting beam 12, and further, the first holding body 34 is moved to the front side wall 12a of the working machine connecting beam 12.
, And the first holding member 34 and the second holding member 33 are connected by the fixing bolt 35a and the fixing nut 35b of the holding fixture 35, so that the first holding member 34 and the second holding member 33 Thus, the working machine connecting beam 12 is held therebetween. Thus, the rotary tillage unit A is connected to the work equipment connection beam 12.

At this time, in this embodiment, since the second holding member 33 is provided with the direct joining portion 33e, the first holding member 34 and the second holding member 33 are held by the holding fixture 35 in the direct joining portion 33e. 33 is directly joined.

On the other hand, on the upper end side of the first holding member 34 and the second holding member 33, the fixing bolt 35a of the holding fixture 35 is attached to the first holding member by the intermediary of the work equipment connecting beam 12 therebetween. It is in a state of being erected between 34 and the second holding body 33. The rolling roller 36 is mounted around the fixing bolt 35a in the erected state, and the rolling roller 36 is brought into contact with the upper side wall 12c of the working machine connecting beam 12.

The second holding member 33 has a lower side wall receiving portion 33d.
No fixing bolt 35a with rolling rollers 36 mounted
May be provided.

When changing the position of the rotary tilling unit A connected to the working machine connecting beam 12, first, the fixing by the holding fixture 35 is loosened, so that the first holding body 34 and the second holding body 33 The holding state of the work equipment connection beam 12 is released.

When the clamping state is released, the rotary tilling unit A is rotated by the rolling rollers 36 to connect the working machine connecting beam.
12 and is suspended from the working machine connecting beam 12 via the rolling rollers 36, so that most of the weight of the rotary tilling unit A can be applied to the working machine connecting beam 12. By applying an excessive load to the unit drive shaft 8, the occurrence of misalignment in the unit drive shaft 8 can be prevented.

As shown in FIGS. 2 and 3, in the present embodiment, the dimensions of the first holding member 34 and the second holding member 33 in the direction parallel to the extension direction of the working machine connecting beam 12 are made as large as possible. At the same time, the two rolling rollers 36 abutting on the upper side wall 12c of the work equipment connecting beam 12 are separated from the connecting part 21 of one rotary tilling unit A as much as possible,
It is arranged on the left and right sides.

Therefore, when the holding state by the first holding body 34 and the second holding body 33 is released, the two rolling rollers 36
Thus, the rotary tilling unit A can be stably hooked, and the movement of the rotary tilling unit A along the work equipment connecting beam 12 can be easily performed. In addition, by moving while being restricted by the first holding member 34 and the second holding member 33, it is possible to prevent an extra load from acting on the unit drive shaft 8.

Particularly, in this embodiment, the rolling roller 36 is
By having a cylindrical body having a length substantially coinciding with the width of the upper side wall 12c, the contact area between the rolling roller 36 and the upper side wall 12c can be increased, and the load per unit area can be reduced and smooth. The rotation of the rotary tillage unit A can be performed.

The number of rolling rollers 36 is not limited to two, and more rolling rollers 36 may be provided.

After the rotary tilling unit A is moved to the required position, it is re-fixed by the holding fixture 35 so that the working machine connecting beam 12 of the rotary tilling unit A is moved.
A connection can be made to For example, positioning grooves (not shown) are formed at predetermined intervals on the front side wall 12a of the working machine connecting beam 12, and the working machine connecting beam 12 of the first holding body 34 is formed.
By providing a positioning ridge (not shown) for engaging with the positioning groove on the contact surface with the positioning groove, the positioning may be easily performed.

With the above configuration, FIG.
As shown in (1), the rotary tillage unit A can be pulled out of the work implement connecting beam 12 and the unit drive shaft 8 and detached therefrom.

Then, a working unit having the same connecting portion 21 as the rotary type tillage unit A and the power transmission portion 19 into which the unit drive shaft 8 is fitted is mounted and used instead of the rotary type tillage unit A. Can also.

That is, by sharing the working machine connecting beam 12, various works can be performed only by replacing the working unit, and compared with the conventional working machine in which the working machine connecting beam 12 is integrated. Cost can be reduced. In addition, since the replacement of the work equipment connecting beam 12 is not required, the weight is reduced, so that the replacement work can be facilitated.

[0047]

According to the first aspect of the present invention, the connecting portion includes a first holding member for holding the work equipment connecting beam, a second holding member, the first holding member and the second holding member. Between the work unit and the work machine connecting beam by arranging a rolling roller in contact with the upper side wall of the working machine connecting beam on the holding fixture. In order to displace the attachment position, when the holding of the working machine connecting beam by the first holding body and the second holding body is released,
The work unit can be hung on the work equipment connection beam by the rolling rollers, so that the entire weight of the work unit can be received by the work equipment connection beam, and an excessive load is applied to the drive shaft that transmits power to the work unit. Can be prevented from acting on the drive shaft, thereby preventing the drive shaft from being misaligned. Further, since the working unit is hung on the work equipment connecting beam via the rolling roller, the working unit can be easily displaced by rolling the rolling roller.

According to the second aspect of the present invention, the first holding member is brought into contact with the front side wall of the working machine connecting beam having a rectangular column shape, and the second holding body is brought into contact with the rear side wall. When the working unit is displaced by holding the connecting beam and by contacting the rolling roller provided on the holding fixture provided above the upper side wall of the square pillar with the upper side wall. In addition, since the working unit can be displaced while being restricted by the first holding body and the second holding body, it is possible to prevent a load from acting on the drive shaft due to the displacement of the working unit.

[Brief description of the drawings]

FIG. 1 is a side view showing a state in which a working unit is connected to a working machine connecting beam.

FIG. 2 is a plan view showing a state in which a working unit is connected to a working machine connecting beam.

FIG. 3 is a plan view showing a state in which a work unit is detached from a work machine connecting beam.

[Explanation of symbols]

 Reference Signs List A Rotary tilling unit B Riding work machine C Rotary part 5 Third power transmission mechanism 8 Unit drive shaft 9 Lifting mechanism 12 Work equipment connection beam 16 Top link connection plate 17 Top link 12a Front side wall 12b Back side wall 12c Upper side wall 18 Power transmission Mechanism support plate 19 Power transmission section 20 Support frame 21 Connection section 25 Chain case 32 Connection arm 33 Second holding body 34 First holding body 35 Holding fixture 35a Fixing bolt 35b Fixing nut 36 Rolling roller

Claims (2)

[Claims] An elevator mechanism (9) provided at the rear of the riding work machine (B).
The connecting part (21) is attached to the working machine connecting beam (12)
In the connecting structure of the working unit of the riding work machine (B), the working unit is connected via the connecting member (21), the connecting portion (21) includes a first holding body (34) for holding the working machine connecting beam (12). , A second holding body (33), and a holding fixture (35) provided between the first holding body (34) and the second holding body (33). 35) work equipment connecting beam (1
A connection structure for working units, wherein a rolling roller (36) is provided to abut on the upper side wall (12c) of 2). 2. The work machine connecting beam (12) is a riding work machine.
(B) extending in the left-right direction, the first sandwiching body (34) is brought into contact with the front side wall (12a) of the square pillar, and the second sandwiching body ( 33) is brought into contact with the work machine connecting beam (12), and the rolling roller (36) provided on the holding fixture (35) installed above the upper side wall (12c) of the rectangular prism body. ) Is in contact with the upper side wall (12c).