JPS6394907A - Reinforcing structure of walking type rice field working machine - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a reinforcing structure for walking-type paddy field working machines such as rice transplanters, seeding machines, and fertilizer spreaders.

[Prior art and problems to be solved by the invention] Generally, in this type of walking type paddy field work machine.

The frame structure is such that the fuselage frame extends rearward from the rear of the transmission case, but the transmission case and the fuselage frame must be firmly connected. So conventionally.

Reinforcement has been done by forming the joint with a thick flange, or by supporting and fixing members such as reinforcing rods between the two. This poses a problem, as it requires a separate reinforcing member, increases the number of parts, and increases the weight of the machine.

[Means for Solving the Problems] In view of the above-mentioned circumstances, the present invention was devised for the purpose of providing a reinforcing structure for a walking paddy field work machine that can eliminate these drawbacks. , a walking type paddy field working machine in which a front end of a body frame is connected to a rear part of a transmission case, in which both front and rear ends of a hydraulic cylinder for controlling vertical movement of traveling wheels are fixed to the transmission case and the body frame, respectively. hand,
It is characterized by a substantially triangular reinforcement structure formed by the transmission case, body frame, and hydraulic cylinder.

With this configuration, the present invention makes it possible to reliably increase the strength of the joint between the transmission case and the fuselage frame by using the hydraulic cylinders necessary to control the vertical movement of the traveling wheels.

[Example] Next, an example of the present invention will be described based on the drawings. In the drawing, 1 is a walking type rice transplanter;
The aircraft is equipped with an engine 2 in the front, and a seedling platform 3 with a low front and rear height. The process of scraping the seedlings and planting them on the rice field remains the same as before.

Reference numeral 5 denotes a running wheel, and the running wheel 5 includes a wheel 5 at the rear end of a second chenno case 6 constituting a bendable chenno case.
The front end of the second chain case 6 is swingably (flexibly) supported by the front end of the first chain case 7. This first chain case 7 has a support shaft 7 attached to the upper part of the transmission case 8.
It is pivotably supported around a as a fulcrum. The driving wheels 5 are driven by the driving force from the engine, and the transmission case 8. First chain case 7, second chain case 6
It is designed to travel and rotate by transmitting power through the .

Reference numeral 9 denotes a fuselage frame (transmission case) in which a flange portion at the front end is integrally attached to the rear end of the transmission case 8, and the fuselage frame 9 is provided with power from the transmission case 8 to the Cheno case 10 side at the rear of the fuselage. A power transmission chain 11 that transmits power is installed inside, and this support is supported by a support shaft 12 that passes through the upper and lower chains of the fuselage frame 9 in the left and right directions and is rotatably supported. The shaft 12 is arranged to be located between the wheel 5a and the support shaft 7a of the first chain case 7, and one end thereof (the left end in the embodiment)
An intermediate boss portion 13a of the actuating arm 13 is pivotally supported so as to be swingable about an axis, and a base end portion of a lock plate 14 is integrally fixed thereto. On the other hand, an intermediate boss 15a of one operating arm 15 is integrally attached to the other end of the support shaft 12 (the right end in the embodiment) by spline fitting. Furthermore, a lock pin 14a is attached to the lock plate 14 for the ammunition 1.
4b, the actuating arm 13 is normally projected and resiliently fitted into a locking hole 13d formed on the side of the actuating arm 13, and in this state, the actuating arm 13 is integral with the lock plate 14. In other words, the operating arm 13 is connected to the support shaft 12 by the lock pin 14.
Furthermore, it has a structure that is integrated with the other operating arm 15, so that when the lock is activated, the left and right operating arms 13.15 are configured to swing simultaneously around the support shaft 12. There is. In addition, the actuating arm 13 is freed from the lock plate 14 by retracting the lock pin 14a against the bullet 14b and pulling it out from the locking hole 13d by, for example, planting in conjunction with the clutch lever engagement operation. As a result, the left and right operating arms 13, 15 are configured to be able to swing independently around the support shaft 12. Moreover, the front end portions of these actuating arms 13, 15 are pivotably attached to the intermediate portion of the second chenoke case 6, respectively.
, 15b.

On the other hand, reference numeral 16 denotes a hydraulic cylinder for controlling the elevation of the aircraft body, which is obliquely installed above the aircraft frame 9 so as to be high in the front and low in the rear. A valve case 17 housing a switching valve is integrally provided at the base end of the hydraulic cylinder 16, and this valve case 17 is further attached to a bracket 18 that is integrally fixed to the fuselage frame 9 with a tightening bolt 18a. is integrally fixed by. Further, the front end portion of the hydraulic cylinder 16 is integrally fixed to a mounting seat 8a which is integrally provided from the transmission case 8 by a tightening bolt 8b.
The body frame 9 and the hydraulic cylinder 16 form a triangular reinforcing frame structure. Further, in the embodiment, the mounting bracket 19a of the fuel tank 19 is integrally attached to the front end of the hydraulic cylinder 16, and the cylinder rod 16a is installed in the space between the fuel tank 19 and the transmission case 8. It is designed to expand and contract, and a large space is secured behind the engine 2 and in front of the transmission case 8 without being obstructed by the hydraulic cylinder 16, so that it can be used, for example, as an air cleaner 2.
In addition to improving maintenance efficiency such as inspection and maintenance of a.
A large space can be secured behind the hydraulic cylinder 16, and when mounting other parts such as a fertilizer application machine, it is possible to secure installation space for parts such as a fertilizer application drive unit, and furthermore, the length of the machine body can be shortened if necessary. can also contribute.

A bullet 20 is interposed at the tip of the cylinder rod 16a, and a center portion of a balance arm 21 is swingably supported by a pin 21a. The front end of an actuating rod 22 is connected to both left and right ends of the balance arm 21, and the rear end of the actuating rod 22 is connected to the aforementioned actuating arm 13.
It is pivotally supported at the rear end of 15 by pins 13c and 15c. Also, a switching plate 1 is integrally attached to the valve shaft 17a protruding from the valve case 17.
The upper end of a sensing rod 24 whose lower end is connected to the float 23 is connected to 7b. The switching plate 17b then swings in conjunction with the vertical swinging of the sensing rod 24 due to the vertical swinging of the float 23 due to changes in the depth and depth of the tiller as the machine travels and the change in ground pressure from the field surface. As a result, the valve switches and the hydraulic cylinder 16
is designed to expand and contract. The expansion and contraction control of the hydraulic cylinder 16 is such that when the plowing platform becomes deeper and the machine body sinks, and the ground pressure of the float 23 increases, the hydraulic cylinder 16 expands, thereby causing the left and right operating rods 22 to move forward. By being simultaneously pushed away by
, 15b swings about the support shaft 12 as a fulcrum to displace it downwards, and the accompanying bending displacement operation of the first chain case 7 and the second chain case 6 causes the traveling wheels 5 to remain vertical on the road. The traveling wheels 5 move downward by the amount that the tiller becomes deeper, and in this way, the vertical movement of the traveling wheels 5 of the machine body is controlled. The planting work will be carried out within the range of vertical movement of the vertical running wheels 5, but in the case of machine rotation, the running wheels 5 may be lowered further downward to lift the machine 1. However, in this case, the traveling wheels 5 are displaced rearward to bring the aircraft into a forward balanced state.

In the embodiment, the vertical displacement position of the running wheel 5 is adjusted by adjustment holes 13e and 15e provided in the actuating arm 13.15 to correspond to Fukada and Asada. In such a case, the adjustment holes 13a and 15e are arranged not on the actuating rod 22 side but on the actuating arm 13.15 side, and in an arc shape with respect to the axis of the actuating arm, so that the displacement locus of the traveling wheel is not changed inadvertently. It is designed to avoid fluctuations and to always operate within a constant trajectory range.

In the embodiment of the present invention configured as described above, the transmission case 8 and the fuselage frame 9 are integrally provided with both the front and rear ends of the hydraulic cylinder 16 for controlling the vertical movement of the traveling wheels 5, respectively. It is connected and fixed to the frame, and has a substantially triangular reinforcing frame structure. For this reason, the transmission case 8 and the fuselage frame 9
The flange-shaped connection part with the rice transplanter is strongly reinforced by the hydraulic cylinder 16, so there is no need to make the flange connection part thicker or use a separate reinforcing rod. The hydraulic cylinder 16, which is an absolutely necessary member for controlling the vertical movement of the traveling wheels 5, has an extremely simple structure that is simply connected and fixed in an inclined manner between the two, so that the hydraulic cylinder 16 can be used effectively as it is. It is possible to increase the strength of the connecting part, which not only allows effective dual-use of parts but also simplifies the structure.
This is not just a matter of reducing the number of parts, but it can also greatly contribute to reducing the weight of the machine.

Moreover, in this thing, the hydraulic cylinder 16 is.

It is sloped and is located on the upper rear side of the engine 2,
In addition, since the rod is configured to expand and contract in the dead space below the front of the fuel tank 19, the hydraulic cylinder 16
The vertical movement control mechanism including the hydraulic cylinder 16 can effectively overlap the stroke on the engine 2 side, which can greatly contribute to making the aircraft more compact. can be placed as close to the front of the aircraft as possible, improving the aircraft's balance.

It should be noted that the present invention is not limited to the above-mentioned embodiments, and the point is that both front and rear ends of a hydraulic cylinder that controls the vertical movement of the traveling wheels are integrally fixed to the transmission case and the aircraft frame, respectively, and the transmission Case,
Any structure may be used as long as it has a substantially triangular reinforcing structure formed by the fuselage frame and a hydraulic cylinder.Therefore, the chain case is not limited to a bent type, and of course may be a single type. It is.

[Operations and Effects] In summary, since the present invention is constructed as described above, the transmission case and the fuselage frame are connected by a substantially triangular reinforcing structure by a hydraulic cylinder whose front and rear ends are both fixed. Therefore, there is no need to reinforce the connecting part between the two by making a thick flange part or using a separate reinforcing rod as in the past, and the hydraulic cylinder required to control the vertical movement of the traveling wheel can be used as is. This means that it can be used for reliable reinforcement. Therefore, in addition to effective dual-use of parts, the structure can be simplified and the number of parts can be reduced, which can greatly contribute to reducing the weight of the aircraft.

[Brief explanation of the drawing]

The drawings show an embodiment of the chain case structure of the reinforcing structure of the walking rice paddy work machine according to the present invention, and FIG. 1 is an overall side view of the walking rice transplanter, and FIG. 2 is a side view of the main parts. Figure 3 is a plan view of the same as above, Figure 4 is an enlarged side view of the main parts, Figure 5 is a plan view of the same as above, Figure 6 is a vertical sectional view of the fuselage frame, Figure 7
The figure is an explanatory diagram of the action. In the figure, 1 is a traveling body, 5 is a traveling wheel, 5a is a wheel, 6 is a second chain case, 7 is a first chain case, 7a is a support shaft, 12 is a support shaft, and 13.15 is an operating arm.

Claims (1)

[Claims] In a walking paddy field work machine in which a front end of a body frame is connected to a rear part of a transmission case, both front and rear ends of a hydraulic cylinder for controlling vertical movement of traveling wheels are fixed to the transmission case and the body frame, respectively. , transmission case, fuselage frame,
and a reinforcing structure for a walking paddy field work machine, characterized in that a substantially triangular reinforcing structure is formed using hydraulic cylinders.