JP2000014213A - Frame structure of paddy field work machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a frame structure of a paddy field work machine, capable of improving a performance for preventing noises caused by a specific front step, improving the attachability or detachability of the front step and further improving a performance for revolving the frame by disposing the front step and forming a support for elastically supporting the link portion of the front step. SOLUTION: A front step 9 provided with step portions 9A placed on both the right and left sides of an engine section and with a connection portion 9B for connecting the front ends of the step portions 9A to each other is disposed. A support portion 31 for elastically supporting the connection portion 9B of the front step 9 is formed in the front portion of an engine-loading frame. Therein, fixing pins 36 capable of being switched into a fixing state for fixing the connection portion 9B to the support portion 31 or into a release state for releasing the fixation by the operation of a handle may be disposed, and slits allowing the withdrawal of the fixing pins to forward or rearward release the pin insertion holes of the support portion 31 or the pin insertion holes of the connection portion 9B may also be formed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a frame structure of a paddy field working machine such as a rice transplanter.

[0002]

2. Description of the Related Art Some paddy field working machines are provided with a step portion located on both left and right sides of a prime mover portion and a front step having a connecting portion connecting front ends of these step portions. In such a paddy field working machine, the front end of the body is brought close to the ridge, and the boarding operation unit disposed at the rear of the prime mover can be easily boarded from the ridge using the front step, so that it is convenient without entering the field. Can be done.

[0003] In order to support the front step in such a paddy working machine having such a front step, an engine mounting frame is conventionally mounted on a traveling transmission case which is connected and fixed to the front of a main frame which supports the boarding operation section. Is connected and fixed, and a supporting portion for supporting the connecting portion of the front step and fastening with a bolt is formed at the front portion of the engine mounting frame, and supporting the rear end of the step portion on the main frame and fastening with the bolt. A support was formed to attach the front step.

Some paddy field working machines are provided with a canopy to improve the operating environment.

In order to support a canopy in a paddy working machine having such a canopy, conventionally, an engine, a transmission case, and an engine mounting frame connected to and fixed to a traveling transmission case supporting a steering front wheel are known. A canopy column was erected in the area between the front and rear of the car.

[0006]

However, the prior art described above has the following disadvantages. On the support surface of the front step, the front step was rigidly connected to each support by bolting the front step to each support, so the vibration of the body frame was transmitted to the front step variously,
The vibration loosened the bolts, causing looseness in fixing, and generated vibration noise.

In addition, when the front steps are attached and detached, laborious and troublesome operations such as loosening and tightening of bolts are required, and the workability of attaching and detaching the front steps is poor.

On the mounting surface of the canopy, the front and rear length of the engine mounting frame becomes longer in order to secure a space for erecting the support between the engine and the transmission case, so that it protrudes forward from the front wheel axle. The length of the overhang was long, which deteriorated the turning performance of the headland.

An object of the present invention is to improve the performance of preventing noise caused by the front step, improve the detachability of the front step, and improve the turning performance of the aircraft.

[0010]

The features, functions and effects of the first aspect of the present invention are as follows.

[Features] A front step including a step portion located on both left and right sides of a driving portion and a connecting portion for connecting front ends of these step portions is provided, and the front step of the engine mounting frame is provided at a front portion of the engine mounting frame. The point is that a supporting portion for elastically supporting the connecting portion is formed.

[Operation] According to the first aspect of the present invention, the supporting portion is formed at the front portion of the engine mounting frame which is a part of the body frame, so that the connecting portion of the front step is elastically supported. Thus, transmission of vibration from the engine mounting frame to the front step can be suppressed.

[Effect] Therefore, according to the first aspect of the present invention, the vibration of the front step caused by the vibration of the body frame can be suppressed, and the loosening of the fixing can be suppressed, so that the vibration noise caused by the front step can be reduced. Can be reduced.

According to the second aspect of the present invention, the features, actions,
The effects are as follows.

[Features] There is provided a front step including a step portion located on the left and right sides of the prime mover and a connecting portion for connecting the front ends of these step portions, and the front step of the engine mounting frame is provided at the front of the engine mounting frame. A supporting portion for supporting the connecting portion is formed, and a fixing pin is provided which can be switched between a fixed state in which the connecting portion is fixed to the supporting portion by a handle operation and a released state in which fixing is released, and The pin insertion hole is formed in a slit which is opened forward or rearward to allow the fixing pin to be pulled out relatively forward or rearward in a released state.

[Operation] According to the second aspect of the invention, the fixing pin is released, the front step is moved backward so that the fixing pin and the slit are fitted, and then the fixing pin is operated to the fixed state. Thereby, the connecting portion can be fixed to the support portion. On the other hand, by operating the fixing pin in the release state and moving the front step forward, the fixing pin is detached from the pin insertion hole, and the fixing of the connecting portion by the support portion can be released. Thus, by operating the fixing pin with the handle, the connecting portion can be fixed and released with respect to the support portion, and by moving the front step back and forth in the released state,
Support and release of the connecting portion to the supporting portion can be performed.

[Effects] Therefore, according to the second aspect of the present invention, the fixing of the connecting portion of the front step to the supporting portion can be performed by a simple operation such as a handle operation, and the workability of attaching and detaching the front step can be improved. Now you can.

According to the third aspect of the present invention, the features, actions,
The effects are as follows.

[Features] A base consisting of left and right brackets and a connecting member connecting the upper and lower middle portions of these brackets is connected and fixed to a transmission case connected to the rear part of the engine mounting frame, and a canopy support is mounted on this base. Is connected and fixed.

According to the third aspect of the present invention, since the canopy support is connected and fixed to the base fixed to the transmission case connected to the rear part of the engine mounting frame, the engine mounted on the engine mounting frame is Space for erecting the support between the transmission case and the transmission case is unnecessary, and the overhang from the steering front wheel axle supported by the transmission case can be reduced.

[Effect] Therefore, according to the third aspect of the present invention, the turning performance on the headland can be improved.

According to the fourth aspect of the present invention, the features, functions,
The effects are as follows.

[Features] In the features of the third invention,
The point is that the canopy is supported only by the base.

[Operation] As means for supporting the canopy, means for supporting the rear portion of the canopy through the support frame to the fuselage frame can also be considered. In this case, the canopy is positioned rearward from the riding operation section covered with the canopy. When performing rearward work such as replenishing seedlings to the seedling planting device to be performed, the pillars inevitably hinder the work, thereby deteriorating the backward workability.
Paying attention to the above points, according to the fourth aspect of the present invention, since the back of the boarding operation section covered with the canopy is provided as a column-free space while the canopy is provided, the rear work such as replenishing seedlings is obstructed by the support. Can be done without.

[Effects] Therefore, according to the fourth aspect of the present invention, the rear workability such as replenishing seedlings can be maintained satisfactorily while providing the canopy.

According to the fifth aspect of the present invention, the features, functions,
The effects are as follows.

[Features] In the features of the third and fourth aspects of the present invention, the base is connected and fixed to the steering post.

[Operation] According to the fifth aspect of the present invention, the base and the steering post are connected and fixed to the base and the steering post so that the base and the steering post are reinforced with each other. The base can be made strong.

[Effects] Therefore, according to the fifth aspect of the present invention, the canopy support strength can be increased simply and inexpensively.

[0030]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 1, a riding type rice transplanter equipped with a fertilizer application, which is an example of a paddy field working machine, includes a plurality of seedling planting devices 2 of a multi-row type at a rear portion of a self-propelled body 1 as a link mechanism. 3 and a hydraulic cylinder 4 so as to be operably connected to each other.

The self-propelled body 1 is mounted on a body frame 7 having a pair of left and right driving front wheels 5 for steering and a pair of left and right driving rear wheels 6 by a front driving unit 8, a front step 9, and a riding operation. It is configured by mounting the unit 10 and the canopy 27. The boarding driver 10 includes a steering handle 10a and a seat 10
b.

As shown in FIGS. 3 and 4, the body frame 7 includes a main frame 1 on which a riding operation unit 10 is mounted.
A transmission case 12 for running and planting is connected and fixed to the front of the vehicle 1 and an engine mounting frame 13 is connected and fixed to the transmission case 12. The driving front wheel 5 is constructed by connecting the transmission case 12 to the front axle. The drive rear wheel 6 is supported via a case 14 and the rear axle case 1
5, the main frame 11 is supported.

The engine 1 which is a main component of the driving unit 8
6 is mounted on the engine mounting frame 13 via a plurality of vibration isolating rubbers 17 in a horizontal position in which the output shaft 16a is positioned in a horizontal direction, as shown in FIGS. A radiator 18 and a suction-type cooling fan 19 are disposed at positions on the left and right sides of the engine 16 where the output shaft 16a does not protrude so as to discharge cooling exhaust toward the engine 16. An air cleaner 20 is communicatively connected to a carburetor 21 located at a front part of the engine 16, and an exhaust manifold 22 and an outer peripheral part of a muffler pipe 23 are provided with a wind guide cover 24 for guiding the cooling and exhaust flow. A belt continuously variable transmission 25 that transmits power from the transmission case 16 to the transmission case 12 and a bonnet 26 are provided.

As shown in detail in FIG. 2, the front step 9 comprises a step part 9A located on the left and right sides of the driving part 8 and a front end of the step part 9A at a position in front of the upper and lower middle part of the driving part 8. Is provided, and the step 9A and the connecting portion 9B are integrally formed.

On the upper part of the transmission case 12, a steering post 29 in which a torque generator 28 for power steering is incorporated at the lower part is provided upright.

Means for attaching the front step 9 to the body frame 7 are shown in FIGS. 6A and 6B and FIG.
As shown in detail in (b) and (a) and (b) of FIG. 9, the right and left portions of the connecting portion 9B of the front step 9 are elastically attached to the front portion of the engine mounting frame 13 via the vibration isolating rubber 30. (Anti-vibration) A pair of left and right support portions 31 for mounting and supporting is formed,
A rubber tubular anti-vibration support member that supports the rear end of the step portion 9A in a vibration-proof manner by inserting a pin 32 fixed to the rear end of the left and right step portions 9A of the front step 9 into the main frame 11 from the front. 33 is inserted and held, and a fixing means is provided.

As shown in FIG. 8, the fixing means swings around the axis P in the vertical direction while penetrating vertically through the connecting portion 9B, the vibration isolating rubber 30 and the supporting portion 31, so that the lower end is fixed to the lower end. The handle 34, which is bent and connected, rides on the cam 35 formed on the support portion 31 and is pulled down, so that the connecting portion 9
The fixing pin 36, which can be operably switched between a fixed state in which B is pressed and fixed to the support portion 31 via the vibration isolating rubber 30 and a released state in which the fixing is released by releasing from the cam 35 to release the lowering, is released. As a means for providing, the fixing pin 36 is inserted in a pin insertion hole 37 formed in the connecting portion 9B in a state where it cannot be removed. The pin insertion hole 38 of the support portion 31 is formed as a slit that opens forward and allows the fixing pin 36 to be pulled out in the released state.

Therefore, according to this configuration, the fixing pin 36
When the front step 9 is moved forward in a state in which the fixing pin 36 is swung to the release state, the fixing pin 36 is moved to the pin insertion hole 38.
The front step 9 can be detached from the body frame 7 by pulling out the pin 32 from the cylindrical anti-vibration support member 33 while the fixing pin 36 is swung to the released state. The front step 9 is moved rearward with the pin 36 inserted into the pin insertion hole 38 and the pin 32 is inserted into the cylindrical anti-vibration support 33, and then the fixing pin 36 is rotated through the handle 34 in the fixed state. As a result, the front step 9 can be fixedly mounted on the body frame 7. The cam 35 is provided with a recess 39 for engaging the handle 34 and pulling down the fixing pin 36 to prevent it from rotating in the fixed state.

The means for supporting the canopy 27 on the body frame 7 is, as shown in detail in FIGS.
A base 40 is fixedly connected to the transmission case 12, and a pair of right and left columns 41 are connected and fixed to the base 40. The canopy 27 is vertically oscillated around the left-right axis and fixed at the upper end of these columns 41. The canopy 27 is supported only by the base 40.

The base 40 comprises a pair of left and right brackets 43 fixedly connected to the transmission case 12 via bolts 42 at two front and rear positions, and a connecting member 44 for connecting the upper and lower intermediate portions of the brackets 43. Member 44
Is connected and fixed to the torque generator 28 via a stay 45. A tank stay 47 for attaching a fuel tank 46 disposed above the wind guide cover 24 is fixedly connected to the connecting member 44.

Reference numeral 48 denotes a muffler disposed below the front step 9.

[Another Embodiment] In the above embodiment, the fixing pin 36 is held by the connecting portion 9B in a retaining state, and the pin insertion hole 38 of the supporting portion 31 is formed as a slit for opening forward, and the fixing is performed in the released state. The front step 9 is detached forward from the body frame 7 by allowing the pin 36 to be pulled out to the front, but as shown in FIG. By holding the pin as a slit for opening the pin insertion hole 37 of the connecting portion 9B backward, the fixing pin 36 can be relatively pulled out from the pin insertion hole 37 to the rear in the released state. May be disengaged forward from the body frame 7.

In the above embodiment, a rice transplanter is described as a paddy field working machine, but other examples of paddy field working machines include a controlling machine and a direct sowing machine.

[Brief description of the drawings]

FIG. 1 is a side view of a riding rice transplanter.

FIG. 2 is a perspective view of a front part of the rice transplanter.

FIG. 3 is a side view of a driving unit.

FIG. 4 is a plan view of a driving unit.

FIG. 5 is a cutaway rear view of an essential part of a driving unit.

FIG. 6 is a plan view showing an attaching / detaching operation of a front step.

FIG. 7 is a longitudinal sectional side view showing the attaching and detaching operation of the front step.

FIG. 8 is a perspective view of a support unit.

FIG. 9 is a vertical side view showing an attaching / detaching operation of a rear part of a front step.

FIG. 10 is a side view of a base.

FIG. 11 is a front view of a base.

FIG. 12 is a plan view showing an attaching / detaching operation of a front step according to another embodiment.

[Explanation of symbols]

 Reference Signs List 8 driving part 9 front step 9A step part 9B connecting part 12 transmission case 13 engine mounting frame 27 canopy 29 steering post 31 support part 36 fixing pin 37 pin insertion hole 38 pin insertion hole 40 base 41 support column 43 bracket 44 connecting member

Claims (5)

[Claims] 1. A front step having a step portion located on both left and right sides of a prime mover and a connecting portion connecting front ends of these step portions, and connecting the front step to a front portion of an engine mounting frame. The frame structure of a paddy field working machine having a support portion for elastically supporting the portion. 2. A front step comprising a step portion located on both left and right sides of a driving portion and a connecting portion connecting front ends of these step portions, wherein the front step is connected to a front portion of an engine mounting frame. Forming a support portion for supporting the portion, providing a fixing pin which can be switched between a fixed state in which the connecting portion is fixed to the supporting portion by a handle operation and a release state in which the fixing is released, and a pin insertion hole of the supporting portion or a pin of the connecting portion; A frame structure for a paddy working machine, wherein an insertion hole is formed in a slit that opens forward or rearward to allow a relative forward or rearward extraction of a fixing pin in a released state. 3. A transmission case connected to a rear portion of an engine mounting frame is fixedly connected to a base including left and right brackets and a connection member connecting upper and lower intermediate portions of the brackets, and a canopy support is mounted on the base. The frame structure of a paddy working machine fixed and connected. 4. The frame structure for a paddy working machine according to claim 3, wherein the canopy is supported only on the base. 5. The frame structure for a paddy working machine according to claim 3, wherein the base is connected and fixed to the steering post.