JPH0452081B2 - - Google Patents

Description

[Detailed Description of the Invention] (a) Field of Industrial Application This invention relates to a dual tilling device in which a first tilling device and a second tilling device are arranged in parallel in front and back so that they can be separated and connected. It is related to the connection structure.

(b) Conventional technology A so-called dual tilling device, in which a second tilling device is installed parallel to the rear of the first tilling device, enhances the tilling and crushing effects on the soil, so it is suitable for hard soils and heavy clay soils. It has often been used in cultivation.

However, conventional dual-type tilling devices are either fixed types in which the first tilling device and the second tilling device cannot be separated, or are fixed type in which the vertical positions cannot be adjusted even if they can be separated. Ta.

(c) Problems to be solved by the invention Therefore, if it is a fixed type, it cannot be separated to form a single type tillage device, and if it is a type that does not change its vertical position, the first tiller cannot be separated. The vertical position of the second tilling device relative to the tilling device, that is, the plowing depth of the second tilling device cannot be adjusted, and these tilling devices are usually quite heavy, so the operation of connecting them is difficult. It was hot.

(d) Means for Solving the Problems Therefore, the present invention provides a first tilling device that is connected to the rear of the tractor via a lifting hitch mechanism, and a first tilling device that is separably connected to the rear of the first tilling device. In a dual tilling device comprising a second tilling device, an engaging member is provided substantially above the center of gravity in the left-right direction of the second tilling device and in front of the center of gravity in the front-rear direction, A supporting member provided on the device is engaged with the engaging member from below, and
The basic configuration is that mounting seats are formed on the front and rear joint surfaces of the second tilling device and the first tilling device, respectively, and these mounting seats are fixed with mounting tools, while the engaging member of the second tilling device is fixed. Attached to the vertical adjustment device,
An additional configuration is one in which the relative mounting position of both mounting seats can be changed up and down, and furthermore, in this configuration,
There is also a structure in which a fixing device is interposed between the vertical adjustment device of the second tilling device and the support member of the first tilling device, so that the first tilling device and the second tilling device can be fixed in addition to being engaged. This is an arbitrary configuration.

In addition, in the above configuration, when the first tilling device and the second tilling device are connected in a normal position, the mounting seat joint extension surface of both tilling devices and the plane connecting the tilling centers of both tilling devices are approximately at right angles. In some cases, it is set to intersect with the .

(E) Function With this configuration, if the second tilling device is placed upright, the first tilling device can be connected to the tractor while it is attached to the tractor, and the engagement members of both can be connected to the vertical adjustment device. By attaching it, the relative height of the two can also be changed.

In addition, if a fixing device is installed in addition to the engaging member,
Both are also more firmly fixed.

Furthermore, when the second tilling device is set at the normal position, the attachment seat joint extension surface of both tilling devices and the plane connecting the tilling centers of both tilling devices are set to intersect at a substantially right angle, Even if the relative heights of both tilling devices are changed, the distance between them remains almost constant.

(F) Embodiments Examples of the present invention will be described below with reference to the drawings.

FIG. 1 is a partially sectional side view of the essential parts of a dual-type tilling device according to the present invention, FIG. 2 is an enlarged sectional view of FIG. 1, and FIGS. Figure 5 is a side view and rear view of the main parts showing the connection structure of the two-tillage system, Figure 5 is an expanded sectional view showing the transmission system, and Figures 6 and 7 are a side view and a plan view of the dual-type tillage system. be.

Dual tillage equipment is mainly used in Figures 6 and 7.
As shown in the figure, a second tilling device 2 is installed in parallel behind the first tilling device 1.

The first tillage device 1 is constructed by connecting side plates 3, 3 on both sides by a beam 4 extending horizontally, and surrounding the upper part with a top plate 5, in the space formed by these. Similarly, the first tilling shaft 6 is rotatably supported laterally and horizontally. A transmission case 7 for transmitting power to the first tilling shaft 6 is provided on the outside of one side plate 3, and a large number of tilling bodies 8 are attached radially to the first tilling shaft 6. It has a normal structure.

The second tilling device 2 is also similar, and each member such as side plates 9, 9, beam (pipe) 10, top plate 11, second tilling shaft 12, transmission case 13, tilling body 14, etc. has the same configuration. However, since the second tilling device 2 is located at the rearmost part, there is also a sieve plate 15 in the part following the top plate 11, and a rear cover 1 behind it.
6 are installed respectively. This rear cover 16 is pushed downward by cover holders 17, 17.

The dual tiller with such a configuration is used by connecting the first tiller 1 to the rear of the tractor 18.
8, a lifting hitch mechanism 21 consisting of an upper link 19 and lower links 20, 20 is extended backwards and connected to a predetermined connection portion of the first tilling device 1. In addition, 22, 22 is a gauge wheel provided in front of the first tilling shaft 6 for setting the tilling depth.

On the other hand, power transmission to the first tilling shaft 6 and the second tilling shaft 12 is configured as shown in FIG. 5, for example.

First, regarding the power transmission to the first tilling shaft 6, an input transmission case 23 is provided in the center of the beam 4, and a transmission joint 25 is connected to the input shaft 24 of this.
The PTO power of the tractor 18 is transmitted by. The power transmitted to the input shaft 24 is appropriately decelerated by the deceleration mechanism 26, and the direction is changed by the bevel mechanism 27, and the power is transferred to the transmission shaft 28 which is inserted through the beam 4 toward the transmission case 7 can be conveyed to. And this transmission shaft 2
8 is a sprocket and chain mechanism 29 inserted into the transmission case 7 and housed therein.
It is adapted to be transmitted to the first tilling shaft 6 by.

Next, regarding the second tilling shaft 12, part of the power is branched from the middle of the transmission shaft 28 by a bevel mechanism 30, and a universal joint 31 (cover (accommodated in a tube 32) and a bevel mechanism 33 to a sub-transmission shaft 35 in a transmission tube 34 installed parallel to the beam 4 described above. The auxiliary transmission shaft 35 is inserted into the transmission case 13 of the second tilling device 2 described above, and is similarly transmitted to the second tilling shaft 12 by the sprocket and chain mechanism 36. Note that since a torque limiter 37 is interposed at the inner shaft end of the sub-transmission shaft 35, the power transmitted from the bevel mechanism 33 to the sub-transmission shaft 35 is adjusted thereby. .

By the way, the first tillage device 1 and the second tillage device 2 as described above are detachably connected by the following connection structure.

FIG. 1 is a partially cross-sectional side view showing a specific example of this. First, it is necessary to locate a portion approximately above the center of gravity in the left-right direction and in front of the center of gravity in the front-rear direction in the middle of the pipe 10 of the second tilling device 2. An engaging member 38 is provided.

A supporting member 39 extending in this direction from the first tilling device 1 can engage with this engaging member 38 by scooping it up from below.

Note that this engaging member 38 may be provided so that its vertical position remains unchanged with respect to the second tilling shaft 12, but as described below, it can be relatively movable up and down (in other words, this A vertical adjustment device 40 (the second tilling shaft 12 is vertically movable) may be provided and attached thereto.

Various types of vertical adjustment device 40 can be considered, but for example, a threaded inner cylinder 41 formed with a female thread is raised from the pipe 10, and a threaded outer cylinder 42 is slidably fitted onto the threaded inner cylinder 41. In addition, a screw shaft 43 may be rotatably mounted on the screw outer cylinder 42, and this screw shaft 43 may be screwed into the screw inner cylinder 41. Therefore, if the handle 44 is fixed to the outer end of the screw shaft 43, this handle 4
By turning 4, the threaded inner cylinder 41 (second tilling shaft 12) and the threaded outer cylinder 42 (engaging member 38) can be relatively expanded and contracted. In addition, 4
Reference numeral 5 denotes a clamp for fixing the screw outer cylinder 37 and the screw inner cylinder 36.

Next, the engaging member 38 attached to the vertical adjustment device 40 must be able to engage with the support member 39 extending from the first tilling device 1 in this direction.

Although there are various types of engagement structures, the above-mentioned engagement member 3
8, pins 46, 4 are provided on both sides of the screw outer cylinder 42.
6 protrudes from the plate 4 which is a supporting member 39.
Fitting parts 48, 48 that fit into the pins 46, 46 are formed at the tips of the pins 7, 47, and the fitting parts 4
8 and 48 may be adapted to fit the pins 46 and 46 by scooping them up from below.

The above is an engagement structure for simply engaging the first tillage device 1 and the second tillage device 2, but in addition to this, a fixing structure for firmly fixing both 1 and 2 is provided separately.

That is, the mounting seats 4 are attached to the rear surface of the first tilling device 1 and the front surface of the second tilling device 2, respectively.
9, 49, 50, 50 are provided, and these mounting seats 49, 49, 50, 50 are connected to appropriate mounting tools 51...
It is made to be fixed by using.

As a specific example of this mounting structure, the mounting tool 51...
Use a bolt for the mounting seat 49, 49 on one side (for example, the second tilling device 2 side), and provide a tap hole (screw hole) into which this bolt is screwed, and then attach the other side (on the first tilling device 1 side). It is conceivable to provide bolt holes or the like in the seats 50, 50 through which bolts are inserted. In addition, since the vertical positions of both mounting seats 49, 49, 50, and 50 must be changeable, the bolt holes must be elongated holes or a plurality of holes arranged vertically.
In addition, this mounting seat 49, 49, 50, 50 is
As shown in the enlarged plan sectional view of the figure, if the fitting structure is such that they fit into each other in a U-shape or the like, it is easy to position left and right at the time of connection.

Furthermore, it is also possible to use bolt holes instead of tap holes and use nuts instead.

On the other hand, the supporting member 39 of the first tilling device 1 described above
In addition to the engagement structure that engages the engagement member 38 of the second tillage device 2, an appropriate fixing device 52 that can fix both 1 and 2 may also be provided.

That is, as shown in the side view of FIG. 3 and the rear view of FIG.
Levers 53, 53 are attached to the plates 47, 47, and the tightening operation of the levers 53, 53 causes tightening members 54, 54 such as wires to tighten the pins 46, 46 of the engaging member 38.

As described above, when connecting the first tilling device 1 and the second tilling device 2 that have been separated, first the second tilling device 2 is attached to the stand that is installed on the side plates 9, 9 so that it can be erected and stored. 55, 55, etc. are stood upright, and the first tilling device 1 attached to the tractor 18 is brought close to it, and the elevating hitch mechanism 2 is
1 to engage the support member 39 with the engagement member 38 from below, and also remove both mounting seats 49, 49,
50, 50 are joined, and this part is attached to the mounting tool 51...
However, it is fixed in place.

The same applies to the case where the engagement member 38 is attached to the vertical adjustment device 40, and the pin 46,
46 and the plates 47, 47, the rest can be done in the same way (furthermore, if a fixing device 52 is provided, operate that as well to fix it). However, during this operation, if the handle 44 is first turned to raise the pins 46, 46 to a very high position, the space into which the plates 47, 47 are inserted becomes larger, making the connection work easier.
However, in this case, it is necessary to finally turn the handle 44 of the vertical adjustment device 40 to raise the second tilling device 2 to a predetermined height. Body 14...
(This is because it is preferable for the outer circumference of the work path to just touch the surface of the cultivated soil.)

Furthermore, when the second tilling device 2 is pulled up to the normal position, the joint extension surface M of the mounting seats 49, 49, 50, 50 of both of them 1 and 2 and the center of both tilling shafts 6 and 12 are The connecting plane L may be set to intersect at a substantially right angle.

That is, since the center of the cultivating body 14 of the second cultivating device 2 in the normal position is slightly above the center of the cultivating body 8 of the first cultivating device 1, the mounting seat 4
The joint extension surfaces M of 9, 49, 50, and 50 may be tilted slightly forward (approximately 5 degrees) toward the top.

(G) Effects of the Invention First, in a dual-type cultivating device that can be separated and connected, the engaging member 38 is provided approximately above the center of gravity in the left-right direction of the second cultivating device 2 and in front of the center of gravity in the front-rear direction. , the supporting member 39 provided on the first tilling device 1 is engaged with this engaging member 38 from below, and mounting seats 49, 49, 50, 50 are attached to the front and rear joint surfaces of the second and first tilling devices 2, 1. form,
Since this is fixed with the mounting seats 51, as described above, if the second tilling device 2 is stood up, the first tilling device 1 can be connected to the tractor 18 while being attached. In other words, such a connection (separation) operation can be performed by one person.

In this case, the connection point is the second tillage device 2
Since it is installed approximately above the center of gravity in the left-right direction and in front of the center of gravity in the front-rear direction, the second tilling device 2 will not tilt to the left or right during connection operation, but will also move forward around the connection point. The mounting seats 49, 49 are urged to rotate, and the mounting seats 49, 49 are the mounting seats 5 of the first tilling device 1.
0 and 50, it is very easy to attach the fixtures 51, etc.

Further, if the engaging member 38 is attached to the vertical adjustment device 40, as described above, by raising the engaging member 38 high first, a large space in front of the engaging member 38 can be secured. This makes the connection operation even easier, and allows the plowing depth adjustment of the second tillage device 2 to be set arbitrarily during work after connection.

Furthermore, if a fixing device 52 is provided in addition to the above-mentioned engagement structure, the fixation of this engagement portion will be stronger and more stable.

In addition, when the second tilling device 2 is set in the normal position, the mounting seats 49, 49 of both tilling devices 1, 2,
By setting the 50, 50 joint extension surface M and the surface L that also connects the tilling center to intersect at a substantially right angle, the entire vertical movement range of the second tilling device 2 (approximately
140mm) of each cultivating body 8..., 14...
The distance between them is kept almost constant (approximately 40 mm).

[Brief explanation of the drawing]

The drawings show embodiments of the invention,
FIG. 1 is a partially sectional side view of the essential parts of a dual-type tilling device according to the present invention, FIG. 2 is an enlarged sectional view of FIG. 1, and FIGS. 2. Side and rear views of the main parts showing the connection structure of the tilling device, Figure 5 is an expanded sectional view showing the transmission system, and Figure 6
This figure and FIG. 7 are a side view and a plan view of the dual-type cultivating device. (Symbols) 1...First rotary, 2...Second rotary, 18...Tractor, 21...Elevating hitch mechanism, 3
8... Engagement member, 39... Support member, 40... Vertical adjustment device, 49... Mounting seat, 50... Mounting seat, 51... Mounting tool, 52... Fixing device, M... Both mounting seat joint extension surface,
L...The surface that connects both cultivation centers.

Claims (1)

[Claims] 1. A first tilling device 1 connected to the rear of the tractor 18 via a lifting hitch mechanism 21, and a second tilling device 2 separably connected to the rear of the first tilling device 1. In the dual-type tilling device, an engaging member 38 is provided above the center of gravity in the left-right direction of the second tillage device 2 and in front of the center of gravity in the front-rear direction, and The supporting member 39 provided is engaged with the engaging member 38 from below, and mounting seats 49 and 50 are formed on the front and rear joint surfaces of the second tilling device 2 and the first tilling device 1, respectively, and both mounting seats 49 and 50 are fixed together using a mounting tool 51. 2. Claim 1, characterized in that the engaging member 38 of the second tillage device 2 is attached to the vertical adjustment device 40, and the relative mounting position of both mounting seats 49, 50 can be changed vertically. A connection structure of the described dual-type tillage device. 3 A fixing device 52 is interposed between the vertical adjustment device 40 of the second tilling device 2 and the support member 39 of the first tilling device 1, and the first tilling device 1 and the second tilling device 2 are engaged with each other. 3. A connecting structure for a dual tiller according to claim 2, characterized in that it has a structure that can be fixed to the tiller. 4 When the first tilling device 1 and the second tilling device 2 are connected in the normal position, the mounting seats 49, 50 joint extension surface M of both tilling devices 1, 2 and the tilling center of both tilling devices 1, 2 are connected. 4. A connecting structure for two-unit cultivating devices according to any one of claims 1 to 3, characterized in that the connecting surfaces L are set to intersect at a substantially right angle.