JPH0684804U - Horizontal adjustment structure of airframe in walking type work machine - Google Patents

Abstract

(57) [Summary] [Purpose] This function enables horizontal adjustment of the machine body to contribute to the improvement of work accuracy, significantly simplifies the adjustment mechanism, and further improves the assemblability. [Structure] The bracket 12 of the main cylinder device 11 is formed with an elongated hole-like mounting hole 12a capable of adjusting the mounting position of the main cylinder device 11 in the left-right direction, and the left and right traveling wheels accompanying adjustment of the mounting position of the main cylinder device 11 are formed. A structure for horizontally adjusting the body of a walk-type working machine in which the body posture is horizontally adjusted based on the antithetical movement of 9.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a structure for horizontally adjusting the body of a walk-type working machine such as a walk-type rice transplanter.

[0002]

[Problems to be Solved by Prior Art and Invention]

 In general, some walking type working machines of this type have a traveling wheel that is vertically movable on the left and right sides of the machine body and is connected to a lift cylinder, and the machine body is moved up and down based on hydraulic operation of the lift cylinder. However, with this model, there is a risk that the height of the left and right traveling wheels will differ due to dimensional errors and assembly errors in the parts.In this case, since the aircraft attitude does not become horizontal but tilts left and right, In particular, in walk-behind rice transplanters, the planting depth of each row varies, resulting in a significant decrease in work accuracy. Therefore, it is proposed to adjust the length of the connecting rod that is interposed between the left and right traveling wheels and the lift cylinder to adjust the aircraft horizontally. Since an adjustment mechanism is installed, the number of parts is increased and the structure is complicated.After assembling the connecting rod to the machine after adjusting it to a predetermined length in advance. However, since the length would have to be adjusted again when the aircraft was leveled, the actual assembly process was complicated.

[0003]

[Means for Solving the Problems]

 The present invention was devised with the aim of providing a leveling structure for a body of a walk-behind work machine that can eliminate these drawbacks in view of the above-mentioned circumstances. In a walk-behind work machine in which traveling wheels that are freely installed are connected to a lift cylinder and the machine body is moved up and down based on the hydraulic operation of the lift cylinder, the cylinder mounting position is set to the left and right in the mounting portion of the lift cylinder. The present invention is characterized in that adjustable mounting position adjusting means is provided, and the body is horizontally adjusted based on the adjusting operation of the mounting position adjusting means. With this configuration, the present invention enables horizontal adjustment of the machine body and contributes to the improvement of working accuracy, while significantly simplifying the adjusting mechanism and further improving the assemblability. It is a thing.

[0004]

【Example】

 Next, an embodiment of the present invention will be described with reference to the drawings. In the drawings, reference numeral 1 denotes a walk-behind rice transplanter, which is an example of a walk-behind working machine, and an engine 2 and a transmission case 3 are arranged in a vertically aligned state at the front part of the body of the rice transplanter. On the other hand, in the rear part of the machine, a planting work unit 6 including a seedling placing table 4 that reciprocates in the left-right direction, a planting mechanism 5 that scrapes planted seedlings from the seedling placing table 4 and planted on the rice field. The left and right traveling wheels 9 are vertically movably connected to the left and right sides of the machine body through a swing case 8 which is swingably supported by an output shaft 7 of the transmission case 3. . The engine power is transmitted to the planting work unit 6 and the traveling wheels 9 via the transmission case 3, and the basic configurations of these are the same as conventional ones.

Reference numeral 11 denotes a main cylinder device composed of both rod-type double-acting cylinders. The main cylinder device 11 is arranged in a vertical position in front of the engine 2 and the transmission case 3. That is, the upper end of the piston rod 11a is integrally fixed to the engine 2 via the upper bracket 12, while the lower end of the piston rod 11a is integrally fixed to the transmission case 3 via the lower bracket 13. For this reason, the main cylinder device 11 can move the cylinder tube 11b up and down with respect to the stationary piston rod 11a.

By the way, the upper and lower brackets 12 and 13 project forward from the engine 2 and the transmission case 3, respectively, and are attached to upper and lower end portions of the piston rod 11a in mounting holes 12a and 13a formed at the projecting tips thereof. The mounting holes 12a formed in the upper bracket 12 are formed as long holes facing left and right. That is, the mounting position (mounting angle) of the main cylinder device 11 can be finely adjusted in the horizontal direction by moving the upper mounting position of the piston rod 11a in the horizontal direction along the elongated hole. .

Further, 14 is a balance arm that faces left and right, and an intermediate portion of the balance arm 14 is pivotally supported by a pin shaft 15 projecting forward and backward from an upper end portion of the cylinder tube 11b in a swinging manner. On the other hand, the left and right ends are connected to the swing arm 8a integrally provided on the swing case 8 side via connection rods 16, respectively. Then, the balance arm 14 moves in parallel following the vertical movement of the cylinder tube 11b associated with the operation of the main cylinder device 11, and based on the parallel movement, the left and right traveling wheels 9 are moved up and down in the same direction to raise and lower the machine body. It is becoming like this.

On the other hand, 17 is an auxiliary cylinder device composed of a single rod type double acting cylinder, and the auxiliary cylinder device 17 is provided between the cylinder tube 11 b of the main cylinder device 11 and the balance arm 14. In this state, they are arranged in parallel with the main cylinder device 11. Then, when the auxiliary cylinder device 17 expands and contracts, the balance arm 14 swings around the pin shaft 15 as a fulcrum, and based on the swing, the left and right traveling wheels 9 are moved up and down in the anti-reverse direction to move the machine body. It is designed to be forced to roll left and right.

Reference numeral 18 denotes a hydraulic valve unit that controls the operation switching of both the cylinder devices 11 and 17, and a spool 19 of a valve for a main cylinder installed in the hydraulic valve unit 18 is a float for detecting the ups and downs of the machine body. On the other hand, the spool 21 of the auxiliary cylinder valve is interlocked with the pendulum body 22 that detects rolling of the machine body. That is, the operation of the main cylinder device 11 is automatically switched on the basis of the detection of the float / sink of the body of the float 20 to automatically control the body to a constant height, and the operation of the auxiliary cylinder device 17 is activated on the basis of the detection of the rolling of the pendulum body 22. Is automatically switched to automatically control the aircraft in a horizontal position.

Reference numeral 23 denotes a vertical feed mechanism arranged on the back surface of the seedling placing table 4, and the vertical feeding mechanism 23 is provided when the seedling placing table 4 reaches the left and right moving ends. In addition, the mat-shaped planted seedlings placed on the seedling placing table 4 are vertically fed downward to a predetermined pitch. That is, the vertical feed mechanism 23 includes a pair of upper and lower rollers 24 rotatably supported at the upper and lower ends of the vertical feed window provided in the seedling table 4, and a mat-shaped seedling through the vertical feed window. It comprises a vertical feed belt 25 suspended between both belts 24 so as to come into contact with the bottom portion thereof, an operating arm 26 linked to the lower roller 24 via a one-way clutch, and the like. The actuating arm 26 is intermittently pressed and oscillated by a rear drive arm 28 that is interlocked with a vertical feed drive mechanism (not shown), which will be described later. The seedling contact part is forcibly fed downward by a predetermined pitch at the timing described above.

On the other hand, the vertical feed drive mechanism is incorporated in the transmission case 4. Then, the front drive arm 29 is intermittently forcibly oscillated at a timing corresponding to the speed of the planting power output from the transmission case 3, and the power of the front drive arm 29 is passed through the connecting rod 30. And is transmitted to the rear drive arm 28. The length of the connection rod 30 is adjusted at the connection portion between the connection rod 30 located below the vertical feed mechanism 23 and the rear drive arm 28. A vertical feed amount adjusting unit 31 for adjusting the vertical feed amount of the vertical feed mechanism 23 is provided based on the above. That is, the vertical feed amount adjusting unit 31 changes the swing range of the rear drive arm 28 based on the length adjustment of the connecting rod 30, and the vertical feed amount of the vertical feed belt 25 based on the change of the swing range. Can be adjusted.

In the embodiment of the present invention configured as described above, the main cylinder device 11 is mounted between the upper and lower brackets 12 and 13, and the mounting hole 12 a of the upper bracket 12 is mounted to the main cylinder device 11. It is formed in a long hole facing left and right so that the position can be adjusted left and right. That is, when the main cylinder device 11 connected to the left and right traveling wheels 9 via the balance arm 14 and the connecting rod 16 is displaced to the left and right, the left and right traveling wheels 9 move up and down in the anti-reverse direction. By aligning the upper and lower positions of the aircraft, the aircraft attitude can be adjusted horizontally. Therefore, even if the height variations of the left and right traveling wheels 9 occur due to the dimensional error and assembly error of the provisional parts during the assembly of the aircraft, the variation can be easily eliminated and the aircraft can be adjusted to the horizontal posture. As a result, the runnability and working accuracy can be improved, and especially the planting accuracy of the multi-row planting type rice transplanter can be significantly improved.

Moreover, the leveling mechanism of the above embodiment can be constructed very simply by forming the mounting hole 12a of the upper bracket 12 into a long hole, so that the leveling of the machine body is adjusted based on the length adjustment of the connecting rod 16. The adjustment mechanism can be remarkably simplified compared to the case where the above procedure is performed, and the assembling process can be simplified to improve the assemblability.

Further, in the above-described embodiment, since the vertical feed amount adjusting unit 31 is provided near the lower portion of the vertical feed mechanism 23, the adjustment work can be performed while actually observing the operating state of the vertical feed mechanism 23. As a result, not only the adjustment work is not allowed to be facilitated, but also the adjustment accuracy can be improved.

[0015]

[Operation effect]

 In short, since the present invention is constructed as described above, the traveling wheels provided on the left and right sides of the machine body are moved up and down based on the hydraulic operation of the lift cylinder to raise and lower the machine body. However, the mounting portion of the lift cylinder is provided with mounting position adjusting means capable of adjusting the cylinder mounting position in the left-right direction. That is, since the left and right traveling wheels can be moved up and down based on the adjustment of the left and right mounting positions of the lift cylinders, it is possible to adjust the machine body to a horizontal posture by matching the vertical positions of both traveling wheels. Therefore, even if the heights of the left and right traveling wheels do not coincide with each other based on the dimensional error of the parts and the assembly error, the error can be easily canceled by the operation of the mounting position adjusting means, and the aircraft can be horizontally adjusted. As a result, the runnability and work accuracy of the walk-behind work machine can be greatly improved, and in the case of a walk-behind rice transplanter, it can greatly contribute to the improvement of planting accuracy.

Moreover, since the mounting position adjusting means can be configured by a very simple design change such as forming the cylinder mounting hole in a long hole facing left and right, it is possible to adjust the length of the connecting rod. Compared to this, the number of parts can be reduced and the structure can be simplified. Since the assembly process is also simplified, the assemblability can be improved.

[Brief description of drawings]

FIG. 1 is a side view of a walk-behind rice transplanter.

FIG. 2 is a side view of the main part of the same.

FIG. 3 is a front view of the attitude control device.

4A and 4B are a plan view and a side view of an upper bracket, respectively.

FIG. 5 is a perspective view of a walk-behind rice transplanter.

[Explanation of symbols]

 1 Rice transplanter 2 Engine 3 Transmission case 6 Planting work part 9 Wheels 11 Main cylinder device 12 Upper bracket 12a Mounting hole 13 Lower bracket 14 Balance arm 17 Secondary cylinder device

Claims (1)

[Scope of utility model registration request] 1. A walk-type working machine in which traveling wheels provided on the left and right sides of a machine body are respectively connected to a lift cylinder, and the machine body is lifted and lowered based on hydraulic operation of the lift cylinder. In the walk-type working machine, a mounting position adjusting means capable of adjusting the cylinder mounting position in the left-right direction is provided in the portion, and the body is horizontally adjusted based on the adjusting operation of the mounting position adjusting means. Horizontal adjustment structure for the aircraft.