JPH0217127B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a lateral vibration prevention device for a mid-mount mower.

(Prior Art) Conventionally, a mounting frame is provided on the lower abdomen of a moving vehicle body, for example, a tractor vehicle body, and a pantograph-type refraction link mechanism that can freely bend around the front and rear axis is provided at both left and right ends of this mounting frame. There is one in which a mid-mount mower is attached to a tractor body via a bending link mechanism so that it can be raised and lowered. In this case, the mower has gauge wheels on both the front and rear, and moves up and down following the undulations of the ground during work, but when working on an incline,
Since each bending link mechanism is bendable around the front and rear axes, the entire mower moves to the lower side and is in a state of lateral vibration with respect to the tractor body. Similar lateral runout also occurs when turning at high speeds. and,
If such lateral vibration occurs, the mower may come into contact with the wheels, especially the rear wheels, or the mowing position may shift, resulting in uncut areas, which hinders efficient work. Therefore, in order to eliminate the above drawbacks, we
There is a lateral vibration prevention device disclosed in Japanese Patent No. -54505.
According to the invention, a guide cylinder is provided on the tractor body side, a steady rest rod is provided on the mower side, and the rod is fitted into the guide cylinder so as to be relatively slidable in the vertical direction.

(Problems to be Solved by the Invention) According to the above configuration, it is possible to effectively prevent the mower from lateral vibration when working on an inclined surface or during high-speed rotation. By the way, the mower is provided with gauge wheels at the front and rear, and the gauge wheels move up and down following the undulations of the ground, and the load of the mower is supported by each gauge wheel. Therefore, the load applied to each gauge wheel is large, and there is a serious problem in that gauge wheel marks are left on the lawn after mowing and the lawn is damaged. SUMMARY OF THE INVENTION In view of the above-mentioned problems, it is an object of the present invention to not only simply prevent lateral vibration, but also to reduce the ground load of a mower.

[Means for Solving the Problems] The technical means is to install a mid-mount mower 4 in the lower abdomen of the moving vehicle body 1, which is movable up and down via a pair of left and right bending link mechanisms 8 which are bendable around the front and rear axes. is installed, and the mid-mount mower 4 and the moving vehicle body 1
A lateral vibration prevention device 19 is provided between the lateral vibration prevention device 19 and a vibration prevention regulating rod 21 provided on either the moving vehicle body 1 side or the mid-mount mower 4 side; A guide member 20 is provided on the other side and guides the regulating rod 21 so as to be relatively movable in the vertical direction. The point is that an engaging spring 29 is provided.

(Function) According to the present invention, the steady rest regulating rod 21 is provided on either the moving vehicle body 1 side or the mid-mount mower 4 side, and the regulating rod 21 is guided on the other side so as to be relatively movable in the vertical direction. The regulating rod 21 and the guide member 20 are provided with a guide member 20 that allows relative movement in the vertical direction when a lateral force is applied to the mower 4 when working on a slope or during high-speed mowing. Since the mower 4 is engaged with the mower 4, relative movement in the lateral direction is effectively restricted, and lateral vibration is prevented. Furthermore, since a biasing spring 29 is provided that biases the mower 4 to pull up freely, the ground load of the mower 4 can be reduced. Furthermore, since the biasing spring 29 is provided using the regulating rod 21 and the guide member 20, the members can be used for multiple purposes, reducing costs and simplifying the structure.

(Embodiment) Hereinafter, a first embodiment of the present invention will be described based on the drawings. In FIGS. 1 and 3, reference numeral 1 denotes a tractor body, which has front wheels 2 and rear wheels 3. Reference numeral 4 denotes a mid-mount mower, which is equipped with a mower frame 5, a plurality of cutting blade bodies 6 rotatably installed around a vertical axis, and a gauge wheel 7, and has a pair of left and right wheels between the front and rear wheels 2 and 3. It is attached to the lower abdomen of the tractor body 1 via a pantograph type refraction link mechanism 8 so as to be able to rise and fall freely. Each cutting blade body 6 is driven by a front power extraction device 9 of the tractor body 1 via a universal joint shaft 10. Each bending link mechanism 8 is formed by connecting a pair of front and rear upper links 11 and lower links 12 so as to be bendable by a longitudinal connecting shaft 13, and each upper link 11 is attached to the outside of a mounting frame 14 mounted on the tractor body 1. At the end, each lower link 12 is pivotally connected to the mower frame 5 side. A pair of left and right lifting cables 15 are connected to the mower frame 5, and each of the lifting cables 15 is connected to a bell crank 17 which is pivotally supported to the mounting frame 14 by a pivot 16, as shown in FIG. The mower 4 is interlocked with each lift arm of a hydraulic system mounted on the rear of the tractor body 1 via an interlocking rod 18 connected to the crank 17.
can be raised and lowered by a hydraulic system.

Reference numeral 19 denotes a lateral vibration prevention device that allows the mower 4 to move up and down and prevents lateral vibration, and is provided between the tractor body 1 and the mower machine frame 5. The lateral vibration prevention device 19 includes a guide member 20 provided on the tractor body 1 side and a vibration prevention regulating rod 21 provided on the mower frame 5 side. The mower frame 5 via the pivot shaft 22 in the direction
It is pivotally attached to the upper bracket 23 so as to be swingable in the front and rear directions. As shown in FIG. 3, the guide member 20 is formed in a U-shape when viewed from the side, and has a side wall portion
is fixed to the rear surface of the base of the mounting stay 24 of the mounting frame 14 by welding, bolting, etc., and insertion holes are formed in the upper wall 26 and the lower wall 27 to guide the regulating rod 21 relatively movably in the vertical direction. . The upper part of the regulating rod 21 is the upper wall 26 of the guide member 20.
Each insertion hole of the lower wall 27 is installed in a concave shape, and the regulating rod 21 is movable relative to the guide member 20 in the vertical direction. Further, a stopper pin 28 is fixed to the middle part of the regulating rod 21 in a penetrating manner so as to come into contact with the lower surface of the lower wall 27 of the guide member 20 so as to be able to come into contact with and separate from the lower surface of the lower wall 27 to restrict upward movement of the regulating rod 21. Further, a biasing spring 29 made of a coil spring is inserted into the regulating rod 21 that protrudes upward from the upper wall 26, and a spring receiving washer 30 is inserted into the regulating rod 21. is provided in a penetrating manner. When the mower frame 5 is lowered, the biasing spring 29 is applied to the upper wall 26.
and the spring receiving washer 30 are configured to be in a compressed state. Therefore, due to the urging force of the urging spring 29, the mower 4 is moved upwardly through the regulating rod 21.
In other words, it is in a state where it is biased to be pulled up.

Further, a plurality of pin holes 31 are formed in the vertical direction, and by selecting the pin holes 31, the upward biasing force of the biasing spring 29 can be adjusted.

The first embodiment of the present invention is configured as described above, and when performing reaping work with the mower 4,
As shown in FIG. 2, while the mower 4 is lowered and the gauge wheels 7 are in contact with the ground, each cutting blade body 6 is driven by the power from the front power extraction device 9.
The tractor body 1 is caused to travel forward. At this time, since each bending link mechanism 8 can be bent only around the front and rear axes, the mower 4 follows the undulations of the ground with the bending and stretching movements of each bending link mechanism 8, and is integrated with the tractor body 1. Since the cutting blade moves, a predetermined cutting operation can be performed using the rotating cutting blade body 6. When the mower 4 moves up and down following the ground, the control rod 21
The mower 4 only slides vertically relative to the guide member 20, and does not interfere with the movement of the mower 4 up and down. In other words, the regulating rod 21 is the guide member 20
Since the regulating rod 21 is inserted into the respective insertion holes of the upper wall 26 and the lower wall 27 so as to be relatively movable, and is pivotally attached to the mower frame 5, there is some play in this part, and the bending link mechanism 8 This does not impair the smooth bending and stretching movements of the body.

When working on a slope or turning at high speed, the mower 4 tends to move due to force in the lateral direction, but the regulating rod 21 on the mower frame 5 side is relative to the guide member 20 only in the vertical direction. Since the mower 4 is inserted through the movable movable mower, its movement in the lateral direction is restricted, and therefore the mower 4 only moves slightly in the lateral direction within the above-mentioned range of play, and there is no large lateral vibration as in the conventional case. In addition, contact between the mower frame 5 and the rear wheels 3 can be prevented, and the driving vehicle can easily control the travel locus of the mower, preventing the occurrence of uncut leaves, etc., and making work more efficient. Also, during reaping work, the mower 4 is elastically biased upward via the regulating rod 21 by the biasing spring 29, so the ground load of the mower 4 can be reduced, and the generation of marks on the gauge wheel 7 can be prevented. At the same time, damage to the grass can be prevented. More more 4
Since the load on the bending link mechanism 8 can be reduced, the ability to follow the undulations of the ground can be improved, and the bending link mechanism 8
The load on the lifting mechanism such as the lifting cable 15 is reduced, and durability is improved. In addition, since the biasing spring 29 is mounted using the regulating rod 21 and the guide member 20, there is no need to provide a separate mounting member, and the member can be used for multiple purposes, reducing costs and simplifying the structure. .

FIG. 4 shows a second embodiment, in which the guide member 20 has a cylindrical shape. The upper end of the guide member 20 is pivotally attached to the lower surface of the mounting frame 14, and the regulating rod 21 is inserted into the guide member 20 so as to be relatively movable in the vertical direction. Further, the biasing spring 29 is attached in tension between the upper end surface of the regulating rod 21 and the inner end surface of the upper wall of the guide member 20. Therefore, the biasing spring 29 is protected by the guide member 20. Alternatively, the guide member 20 may be attached to the mower frame 5 side, and the regulating rod 21 may be attached to the mounting frame 14 side.

Note that the number of lateral shake prevention devices in each embodiment may be determined as appropriate.

(Effects of the Invention) According to the present invention, a steady rest regulating rod is provided on either the moving vehicle body side or the mid-mount mower side, and a guide for guiding the regulating rod so as to be relatively movable in the vertical direction is provided on the other side. The parts are provided,
When a lateral force is applied to the mower when working on a slope or turning at high speed, the regulating rod and the guide member are engaged so that they can move relative to each other in the vertical direction. Movement is effectively regulated and lateral vibration can be prevented. In addition, because it is equipped with a biasing spring that automatically biases the mower by pulling it up, the ground load of the mower can be reduced, gauge ring marks and damage to the grass can be prevented, and the ability to follow the undulations of the ground can be improved. The load on the bending link mechanism and lifting mechanism is reduced, improving durability. Furthermore, since the biasing spring is provided by using the regulating rod and the guide member, the members can be used for multiple purposes, which has the advantage of reducing costs and simplifying the structure.

[Brief explanation of drawings]

FIG. 1 is a schematic rear view showing the first embodiment of the present invention, FIG. 2 is a side view of the same, FIG. 3 is an enlarged view of the same essential parts, and FIG. 4 is a rear view showing the second embodiment. . DESCRIPTION OF SYMBOLS 1... Tractor body, 4... Mid-mount mower, 8... Refraction link mechanism, 19... Lateral vibration prevention device, 20... Guide member, 21... Regulation rod, 2
9...Biasing spring.

Claims (1)

[Claims] 1 A mid-mount mower 4 is attached to the lower abdomen of the moving vehicle body 1 so as to be able to rise and fall freely via a pair of left and right bending link mechanisms 8 that can freely bend around the longitudinal axis, and the mid-mount mower 4 and the moving vehicle body 1 are connected to each other. In the device in which a lateral vibration prevention device 19 is provided between the vibration prevention device 19 and the vibration prevention control rod 21 provided on either the moving vehicle body 1 side or the midmount mower 4 side, and the vibration prevention device 19 on the other side. and a guide member 20 that guides the regulating rod 21 so as to be relatively movable in the vertical direction. A lateral vibration prevention device for a mid-mount mower, characterized in that a biasing spring 29 is also provided.