JPH09119521A - Speed change operating device for traveling working machinery - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an auxiliary transmission gear by which auxiliary speed change operation is carried out simply and easily and step down operation is carried out. SOLUTION: In a traveling machinery 1 provided with a main clutch pedal 31 and a brake pedal 32 on the light and left sides of an operating part having a steering 3a, a main speed change lever 33 for carrying out forward/backward traveling switching of a machinery, and an auxiliary transmission gear 6 for carrying out speed switching of high speed and low speed, the auxiliary transmission gear 6 is formed in such a constitution that speed switching is carried out independently into high speed, low speed, and an neutral position by stepping operation of a step down pedal.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gear shift operation device for a traveling work machine having a sub gear shift device such as a rice transplanter or a tractor.

[0002]

2. Description of the Related Art Conventionally, a sub-transmission of a riding type rice transplanter, which is a traveling working machine, has a main clutch pedal and a brake pedal arranged on the left and right of a control section having steering installed on the traveling machine body, The main gearshift lever for switching between forward and backward movement is installed upright to the left of the steering wheel, and the auxiliary speed for manual operation for switching the traveling speed to high-speed road traveling, low-speed planting traveling and neutral state on the step below the steering wheel. The speed change lever is erected shorter than the main speed change lever.

[0003]

In the shift operating device for a traveling work machine according to the above-mentioned conventional structure, when the auxiliary shift lever is manually operated to shift gears, the driver leans the upper body in a forward leaning posture to perform the gear shifting operation. Since it is necessary to operate the steering wheel at the same time, the operation levers for other work machines cannot be operated in parallel, and it takes force to switch the auxiliary speed change lever by one hand operation. However, there has been a problem for drivers such as women and girls in performing good gear shifting operations.

[0004]

SUMMARY OF THE INVENTION In order to solve the above-mentioned conventional problems, a gear shift operating device for a traveling work machine according to the present invention has main clutch pedals on the left and right of a steering section having steering installed on the traveling body. In a traveling work machine equipped with a brake pedal, a main gear shift lever for switching forward and backward of the machine body, and an auxiliary transmission device for speed switching, the auxiliary transmission device is operated at high speed by stepping on a foot pedal. And a switching mechanism that switches and shifts to a low speed and a neutral position separately.

Further, the foot pedal of the switching mechanism is installed behind the steering shaft standing upright in the center of the control section or between the steering shaft and the brake pedal and below the rear surface of the control panel cover. It has a feature.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described with reference to the drawings. A riding type rice transplanter 1 shown as an example of a traveling work machine is mounted on a traveling machine body 1c having front wheels 1a and rear wheels 1b with an engine 1e covered with a bonnet 2 and the bonnet. The steering section 3 including the steering wheel 3a and the steering seat 3b standing on the steering section panel cover 2a that is continuously provided so as to cover the rear section of the vehicle 2 is installed, and the lifting mechanism 4 provided at the rear section of the machine body mounts the seedlings. Stand 5a
A planting device 5 including a planting claw 5b for scraping off the seedling from the plant and planting it on the ground, a gliding float 5c, and the like is mounted so as to be able to move up and down.

The control section 3 includes a control section panel cover 2
A support shaft (steering shaft) 30 of the steering wheel 3a is erected in the center of the control panel 2p formed on the upper part of a, the main clutch pedal 31 is on the left side of the control panel cover 2a, and the traveling device is on the right side. The main gear shift lever 33 is provided on the left side of the steering wheel 3a for switching between the forward and backward movements of the vehicle body, and extends toward the hand side while being guided and supported by the lever guide 33a. As shown in FIG. 4, the lever guide 33a of the main shift lever 33 is provided.
Has a U-shaped guide groove 34 for switching the airframe between forward and backward, and the left side of the guide groove 34 is set as the forward position F and the right side is set as the reverse position R. And each position F, R
When the main shift lever 33 is tilted forward, the traveling speed is increased via a continuously variable transmission mechanism (not shown).

On the other hand, in addition to the main speed change lever 33, the auxiliary speed change device 6 for assisting speed change between high speed and low speed of the machine body.
Is a foot-operated operating lever (hereinafter referred to as a foot pedal) 6a
At the rear of the steering shaft 30 provided upright in the center of the control panel cover 2a, or between the steering shaft 30 and the brake pedal 32, and at the control panel cover 2
The lower part of the back side of a is installed on the control section deck 3c so as to be able to be stepped on by the configuration described later.

Further, the working machine lever 52 for raising and lowering and planting the planting device 5 is guided and supported by a lever guide 53 having a long groove-shaped guide groove 53a provided on the side of the control sheet 3b. . By operating the working machine lever 52, it is possible to lower the planting device 5 through the elevating mechanism 4 into a planting work posture and drive the same, and to stop the planting device 5 and move it upward. it can.

As shown in FIGS. 4 and 5, the auxiliary transmission device 6 is provided.
Includes a switching mechanism 6b for sequentially and continuously switching speeds such as high speed, low speed, and neutral position by stepping on the foot pedal 6a. That is, the auxiliary transmission device 6
Is rotatably supported on a support frame 60 attached to the control section deck 3c, and a supporting shaft 61 to which a semi-arcuate supporting drum 62 having the foot pedal 6a is fixed is rotatably supported. An operating member 63 having an operating claw 63a projecting from the side of the drum 62 is integrally fixed, and a winding spring 64 is interposed between the support frame 60 and the supporting drum 62.
The actuating member 63 and the actuating member 63 are maintained in a fixed position so that they can be returned by rotation.

A rotary shaft 68 is rotatably supported by the support frame 60 below the support shaft 61.
Passive member 65 in which four passive pawls 65a that engage with the operating pawl 63a of the operating member 63 in a disengageable manner are formed to project at equal angles in the circumferential direction.
And a rotary cam 67 in which a guide groove 66 for switching the shifter 70 of the auxiliary transmission mechanism 7, which will be described later, is integrally provided to configure the switching mechanism 6b. As shown in the development view of FIG. 6B, the guide groove 66 connects the inclined groove 66a and the return groove 66b formed on the peripheral surface of the rotary cam 67 to communicate with each other. Is set to a neutral position N, a low speed position L and a high speed position H are set on both sides of the neutral position N, and the high speed position H is set to the return direction side end of the return groove 66b.

The sub-transmission mechanism 7 slidably mounts a shifter shaft 71 having a shifter 70, which engages with a sub-transmission gear (not shown), in a support hole 72 of the transmission case and is orthogonal to the support hole 72. The positioning ball 73, which is provided in the direction in which the spring is elastically pressed by the spring, is switched to the respective concave grooves of the neutral position groove 7N, the low speed position groove 7L, and the high speed position groove 7H formed in the axial direction of the shifter shaft 71. It is provided so as to be engageable with each shift position. The tip end of the operating rod 75 protruding from the shifter shaft 71 is engaged with the guide groove 66 of the rotary cam 67.
Reference numeral 74 is a return spring that urges the shifter shaft 71 to the right.

The rice transplanter 1 equipped with the auxiliary transmission 6 configured as described above switches the forward and backward movements of the airframe by depressing the main clutch pedal 31 and switching the main shift lever 33, and the main shift is performed. By operating the lever 33 in the forward direction, the vehicle speed can be increased and adjusted. Then, when performing the switching operation of the sub-variation device 6, the foot pedal 6a is moved to the position shown in FIG.
This can be quickly performed by changing from the standby posture shown by the solid line in (B) to the stepping posture shown by the dotted line that is rotated by approximately 90 degrees with the foot. That is, since the operating pawl 63a of the operating member 63 engages the passive pawl 65a of the passive member 65 in the neutral position by the pushing movement of the foot pedal 6a, the rotary cam 67 is thereby shown in FIG. 6 (B). Is rotated about 90 degrees from the neutral position N to move the operating rod 75 to the inclined groove 6
6a to move the ball 73 so that the ball 73 moves to the shifter shaft 71.
The operation is stopped at a low speed position that engages with the low speed position groove 7L. Based on this operation, the shifter 70 can bring the sub transmission gear of the sub transmission mechanism 7 into the low speed meshing state to cause the rice transplanter 1 to plant and travel at a low traveling speed suitable for the planting work.

Next, when it is desired to drive the sub-transformer 6 at a high speed suitable for running on the road, the foot pedal 6a is returned to the standby position by the spring 64. By pushing, the actuating claw 63a of the actuating member 63 engages with the next passive claw 65a to rotate the rotary cam 67 by approximately 90 degrees. As a result, when the return groove 66b of the guide groove 66 is aligned with the operating rod 75, the return spring 74 pushes the shifter shaft 71 to the right,
Based on this operation, the ball 73 and the high-speed position groove 7H are positioned and engaged in the shifter 70, and the sub-transmission gear of the sub-transmission mechanism 7 is brought into a high-speed meshing state so that the rice transplanter 1 can travel at high speed.

Then, from the above high-speed running state, the sub-transformer 6
When it is desired to switch to the low speed running state again, the foot pedal 6a is once pushed to actuate the actuating member 63 and the rotating cam 67, and the actuating rod 75 is returned to the original neutral position N by the guide groove 66. By pushing the foot pedal 6a again in the same manner as described above, the operating rod 75 is guided and moved by the guide groove 66 and positioned at the low speed position L, so that the low speed running state is smoothly switched through the neutral position N. be able to.

At this time, the auxiliary transmission 6 is operated by the foot pedal 6
a is behind the steering shaft 30 provided upright in the center of the control panel cover 2a, or between the steering shaft 30 and the brake pedal 32, and the control panel cover 2
Since it is installed in the lower rear part of a so that the operator can step on the foot, unlike the conventional auxiliary transmission that manually operates the auxiliary transmission lever, the driver does not have to take a forward leaning posture and perform a transmission operation. The gear shift operation can be accurately and easily performed by moving the foot on the side of the brake pedal 32 to the back of the control panel cover 2a while keeping a good eye on the front and simply stepping on the foot pedal 6a. it can.

Therefore, the foot pedal 6a installed as described above does not hinder the pushing operation of the brake pedal 32 which is frequently depressed, and the brake pedal 32 is also operated.
The foot pedal 6a of the auxiliary transmission 6 can be distinguished without being confused with the pedaling operation of
Can be accurately and accurately operated with the foot on the brake pedal 32 side. Therefore, it is possible to easily and simultaneously operate the work implement lever 52 and the like with the other hand while operating the steering wheel 3a, and the road planting and planting traveling work by the rice transplanter 1 can be efficiently performed. Can be done well.

Further, the sub-transmission device 6 thus constructed
Repeats the pushing operation of the foot pedal 6a in the same direction to continuously switch the speed between the high speed and the low speed via the neutral position N. It is possible to confirm the changeover, and it is possible to stop and maintain the machine body at the neutral position via the auxiliary transmission 6. In addition, the auxiliary transmission 6 has a foot pedal 6a.
It is advisable to install the display means 2b, which displays the shift change state in response to the stepping operation, on, for example, the control panel portion 2p or the auxiliary transmission device 6 at a location where it is easily visible.

Further, the guide groove 66 of the rotary cam 67 which constitutes the switching mechanism 6b of the auxiliary transmission device 6 capable of continuous switching as described above is not limited to the above-described one but is constructed as shown in FIG. 6 (C). You may. That is, this rotating cam 67
The guide groove 66c and 66d are engraved so as to form a continuous guide groove 66 by intersecting at the center, and the tip of the operating rod 75 is slidably engaged in the guide groove 66. The guide piece 69 is pivotally supported so that it can be turned. At the intersection of the guide grooves 66c and 66d, the operating rod 75 is set to the neutral position N for setting and maintaining the shifter shaft 71 at the neutral position, and the high speed position H and the low speed position L are provided before and after the turning direction. It is set individually.

As a result, when the foot pedal 6a is pushed and the rotary cam 67 is rotated 180 degrees in the arrow direction,
The operating rod 75 is guided to the low speed position L on the side of the guide groove 66d and switched so as to travel at a low speed. Further, when it is desired to travel at a high speed, when the foot pedal 6a is depressed from this state, the operating rod 75 is returned to the original neutral position N with the guide piece 69 directed toward the other guide groove 66c side, and therefore, again. By pushing the foot pedal 6a, the operating rod 75 can be guided to the high speed position H and switched to run at high speed. Therefore, also in this case, it is possible to smoothly perform the continuous gear shift between the high speed position H and the low speed position L via the neutral position N. In addition, the rotary cam 67 is set to 180
The rotating mechanism that rotates each time may be appropriately configured by a rack that is operated by pushing the foot pedal 6a and a pinion that meshes with the rack.

The seedling placing table 5a of the rice transplanter 1 which is operated as described above has a transparent plate made of a plastic material on the entire surface thereof, which is processed by vacuum forming or the like to form the seedling placing surface 50 and the rib portion for the seedling guide. 51 and 51 are integrally formed for a plurality of lines, and FIG.
As shown in Fig. 4, when the vehicle is moved backward with the planting device 5 raised, the rear view is not blocked by the seedling mounting table 5a unlike a conventional one, and the transparent seedling mounting table 5a is used. The rear side can be seen well, and the driver can check the remaining amount of seedlings from the back side of the seedling stand 5a. If the rib portions 51, 51 formed on both sides of the seedling mounting table 5a are formed of colored or opaque members, it is possible to easily confirm the machine body width using the rib portions 51, 51 as an index, and the rib portion 51 in the middle is used.・ ・ By doing the same, it is possible to make it easier to supply seedlings and check the remaining amount of seedlings for each shoot.

[0022]

As described above, according to the first aspect of the present invention, the sub-transmission device can change gears between high speed, low speed and neutral position by stepping on the foot pedal, so that women and women etc. It is also possible for the driver to easily perform the auxiliary shift operation, and at that time, the driver does not have to take a forward leaning posture and can perform a good operation while keeping a close eye on the front without performing the shifting operation. it can. Also, while operating the steering wheel, the operation of the working machine lever and the like and the auxiliary transmission can be operated at the same time, and the work can be performed efficiently and smoothly.

According to the second aspect of the invention, when the foot pedal of the auxiliary transmission is operated, the left foot depresses the left main clutch pedal, and the right foot on the brake pedal side is moved to the rear of the control panel cover. Since the shift operation can be performed by depressing the foot pedal, the clutch switching operation and the auxiliary shift operation can be favorably pushed by the left and right feet.

[Brief description of the drawings]

FIG. 1 is a side view of a riding type rice transplanter equipped with an auxiliary transmission of the present invention.

FIG. 2 is a plan view of FIG. 1;

FIG. 3 is a perspective view of FIG. 1;

FIG. 4 is a rear view showing a main part of a control unit.

FIG. 5A is a perspective view of an auxiliary transmission. (B) is a left side view showing the action.

FIG. 6A is a rear view showing the operation of the auxiliary transmission device.
(B) is a development view showing the guide groove of the rotating cam of (A).
FIG. 6C is a development view showing a guide groove of a rotary cam according to another embodiment.

[Explanation of symbols]

 1 Rice transplanter (running machine) 2 Bonnet 2a Control panel cover 3 Control section 3a Steering 5 Planting device 6 Auxiliary transmission 6a Foot pedal 6b Switching mechanism 7 Auxiliary transmission 30 Steering shaft 31 Main clutch pedal 32 Brake pedal 33 Main Speed change lever 63 Operating member 67 Rotating cam 71 Shifter shaft 70 Shifter 75 Operating rod

Claims (2)

[Claims] 1. A main clutch pedal and a brake pedal are arranged on the left and right of a steering section having steering installed on a traveling machine body, a main gear shift lever for switching forward and backward of the machine body, and a sub gear shift for switching speed. In a traveling work machine provided with a device, the sub-transmission device is constituted by a switching mechanism that switches and shifts to a high speed, a low speed, and a neutral position separately by stepping on a foot pedal. Operating device. 2. The foot pedal of the switching mechanism is installed behind a steering shaft standing upright in the center of the control section or between the steering shaft and the brake pedal and below the rear surface of the control panel cover. 1. A shift operation device for a traveling work machine according to 1.