JPS6336828Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention connects the lower end of a pedal support rod to the free end side of a vertically swinging arm located below a footrest step, and connects this pedal support rod to the footrest. This invention relates to a pedal operating device for a riding work vehicle, which is slidably passed through a rod insertion hole formed in a step.

Conventionally, in the pedal operation device mentioned above,
For example, Utility Model Publication No. 47-6897, or Utility Model Number 51-
As described in Publication No. 49693, in order to prevent the rod insertion hole formed in the footrest step from becoming a large hole that is long in the front-rear direction of the vehicle body, the part of the pedal support rod that is inserted into the rod insertion hole is vertically swung. It is formed in an arc shape centered on the swing axis of the moving arm to reduce the opening area of the rod insertion hole as much as possible, reducing the strength of the footrest step.
This eliminates the inconvenience of muddy water splashing above the step through the rod insertion hole.

However, in this case, the pedal support rod must be formed into an arc shape, which takes time and effort to manufacture, and when connecting the pedal support rod and the vertical swing arm, the relative mounting angle must be adjusted to a predetermined angle. If the pedal support rod is not set and connected, there is a risk that the pedal support rod will come into contact with the edge of the rod insertion hole, making it impossible to operate smoothly. There was a drawback that required

This invention not only simplifies the manufacturing and processing of the pedal-type operating device and simplifies the assembly work, but also solves the new problems that arise along with this, making it easy to manufacture and process at low cost. The object of the present invention is to provide a pedal-type operating device for a riding work vehicle that can also be assembled.

The characteristic structure of the present invention for achieving the above object is that the lower end of the pedal support rod is connected to the free end side of the vertically swinging arm located below the footrest step. In a pedal operation device for a riding work vehicle, in which a rod is slidably passed through a rod insertion hole formed in the footrest step, the pedal support rod is formed in a straight shaft shape, and its lower end is pivoted up and down. For the arm,
Among the rubber mats, which are pivotally connected to each other so as to be relatively swingable around a horizontal axis in a direction perpendicular to the arm swinging plane, and which are laid on the upper surface of the footrest step,
The edge of the rod insertion hole is made to protrude toward the center of the rod insertion hole than the edge of the rod insertion hole to form a buffering elastic body, and the side surface of the pedal support rod is covered with the cushioning elastic body. The reason is that it is received and supported in a locking manner so that it cannot fall over, and this structure provides the following functions and effects.

In other words, the pedal support rod is formed into a straight shaft shape, making it easy to manufacture, and the rod and the vertical swinging arm are pivotally connected around the horizontal axis so that they can swing freely relative to each other. We were able to configure it so that high accuracy was not required.

In addition, by making the pedal support rod part straight, it has the above-mentioned advantages in terms of manufacturing and machining compared to the case where it is formed in an arc shape around the axis of the swinging arm, but on the other hand, it requires a slightly wider step opening. There is also the problem that the automatic movement of the pedal support rod causes the rod to hit the periphery of the rod insertion hole, making it easy to generate vibration noise.In this invention, we have solved this new problem. This problem was successfully solved by making effective use of the rubber mat placed on the top of the steps. In other words, the gap in the rod insertion hole can be closed using an extremely simple structure in which the mat on the edge of the rod insertion hole is made to protrude further toward the center of the rod than the edge of the rod insertion hole. There is no need to provide a separate sealing material or a separate cushioning material to prevent rod collisions, and there is no need to separately install such separate parts, so it is low cost, easy to work with, and solves the problems mentioned above. This is what I did. For these reasons, overall, it is possible to obtain a pedal-type operating device for a work vehicle at low cost and with good workability in manufacturing and assembly work.

Hereinafter, embodiments of the present invention will be described in detail based on the drawings.

As shown in FIGS. 1 to 3, it is equipped with a pair of left and right front wheels 1, 1 that can be driven and rotated and whose direction can be changed, and a pair of left and right rear wheels 2, 2 that can be driven and rotated,
Engine 3 and transmission case 4, driver's seat 5
At the rear of the passenger vehicle body, which is located in front of the vehicle body and at the front end of the vehicle, there is a slanted seedling platform 6 that moves back and forth horizontally at a constant stroke with four pine-shaped seedlings, W, placed side by side in the horizontal direction. , each pine-like seedling W
A seedling planting device 9 is equipped with four planting claws 7 that take out and plant one seedling from the lower end of each, and three floats 8 arranged side by side at appropriate intervals in the horizontal direction. , a pair of upper and lower lifting links 10a, 10b
Furthermore, a hydraulic cylinder 11 for lifting and lowering the seedling planting device is provided in such a manner that the upper lifting link 10a can be operated to swing up and down with respect to the vehicle body. It is configured to plant four rows of seedlings, and in order to maintain a constant planting depth and to avoid contact of the seedling planting device 9 with the ground when traveling on a headland or on a road. The seedling planting device 9 is configured to be able to be raised and lowered relative to the vehicle body.

A belt-tension type transmission clutch 12 is provided for intermittent transmission of the output of the engine 3 to the transmission case 4, and an operating lever 13 and a foot pedal 14 are provided therefor.

Then, as shown in FIG. 4, by sliding the sliding gear 15a into the transmission case 4,
The driving speed of the seedling planting device 9 relative to the traveling speed is changed by sliding the traveling transmission 15 that switches the traveling speed between two forward speeds and one reverse speed, the front wheel differential transmission 16, and the sliding gear 17a. Inter-stock transmission device 17,
An interlocking type planting clutch 18 that intermittents the drive of the seedling planting device 9 by sliding the movable clutch piece 18a;
A safety clutch 19 that automatically disconnects when the drive torque of the seedling planting device 9 exceeds a set value, and
An interlocking type differential lock piece 20 is provided for switching the front wheel differential transmission 16 between a state that allows differential rotation and a state that prevents differential rotation. In addition, the power of the front wheel differential transmission 16 is transferred to the rear wheel drive case 21.
A shaft 23 is provided to transmit power to the input bevel gear 22 in the inner side, and the output of the input bevel gear 22 is transmitted to the left and right rear wheels 2
The movable clutch pieces 24a, 2
Steering clutches 24, 24 are provided which can be individually operated on and off by sliding the steering clutches 4b. Furthermore, an output shaft 25 for transmitting the power of the planting clutch 18 to the rear of the vehicle body is provided, and a transmission shaft 26 for driving the seedling planting device is provided.
A universal joint 2 is attached to each of the output shaft 25 next to the vehicle body and the input shaft 27 of the seedling planting device 9.
8 and 28 so that they rotate together.

A footrest step 29 is provided at the lower front of the driver's seat 5, and a pair of left and right auxiliary footrests 30, 30 are provided at the front.
are each bolted to the front end of the footrest step 29. the foot pedal 14 for operating the transmission clutch; and the rear wheel steering clutch 24;
A pair of steering pedals 31 connected to the rod 24
Support rods 14a and 31 for each of A and 31B
a, 31b to the transmission case 4, and a pair of left and right rod insertion holes 33, 33.
, the footrest step 29 and both auxiliary steps 30,
30 connections.

As shown in FIGS. 5 and 6, the vertically swinging arm 34 for operating the differential gear is mounted on the mission case 4 located below the footrest step 29.
A defrock foot pedal 3 installed so as to be able to swing freely around the horizontal axis X and to be biased back upwards.
5 is slidably inserted into the rod insertion hole 37 formed in the footrest step 29 in a state where it is locked and supported so that it cannot fall down.
An L-shaped bent portion 36a at the lower end of the rod 36 is pivotally connected to the vertically swinging arm 34 using a flexible hole 38 formed therein to allow relative movement along the arm's longitudinal direction. Therefore, the pedal 35 can be supported while the opening area of the rod insertion hole 37 is reduced. In addition, a rubber mat 3 attached to the top surface of the footrest step 29
The rod insertion hole edge portion 39a of No. 9 is configured so that the rod side surface serves both as a receiving member and as a buffering elastic body.

As shown in FIGS. 3 and 7, a gear shift lever 40 for the traveling transmission 15 is pivoted to the transmission case 4 so as to be swingable left and right, and a lever operation position display plate 41 is arranged to indicate the upper and lower positions of the lever 40. A height corresponding to the intermediate part is provided, and reverse R, neutral N, forward 1st speed F ₁ for planting, neutral N, and 2nd forward speed F ₂ for driving are provided.
Each of them is shown in a state in which they are arranged in the horizontal direction in that order, and in a state in which they are located immediately in front of and to the side of the lever grip portion 40a in plan view.

As shown in FIG. 3, FIG. 8, and FIG. 9, a fuel tank 44 is provided to surround the rotational support shaft 43 of the steering handle 42 relative to the front wheels 1, 1,
A cover 45 that covers the support shaft 43 above the tank 44
In a side view, the axis Y is inclined with respect to the upper surface of the cover, and the distance in the radial direction between the support shaft insertion hole 46 formed in the cover 45 and the outer surface of the support shaft is the same over the entire circumference. It is made to penetrate in such a state.

The present invention can be used not only to operate the differential lock piece 20, but also to operate various devices installed in various riding vehicles, such as, for example, to operate various control valves in construction machinery.

Incidentally, although reference numerals are written in the claims section of the utility model registration for convenience of comparison with the drawings, the present invention is not limited to the structure of the attached drawings by such entry.

[Brief explanation of the drawing]

Figure 1 is a side view of the riding rice transplanter, Figure 2 is a plan view of the control section, Figure 3 is a cutaway side view of the same section, and Figure 4 is a side view of the riding rice transplanter.
The figure is a schematic diagram of the transmission system, Figure 5 is a side view of the pedal mounting structure, Figure 6 is a front view of the same structure, Figure 7 is an expanded rear view of the gear shift lever mounting part, and Figure 8 is a side view of the tank cover. FIG. 9 is a sectional view taken along the - line in FIG. 8. 29... Foot rest step, 34... Vertical swing arm, 36... Pedal support rod, 36a...
Lower end of rod, 37...Rod insertion hole, 38...
Hole, 39...Rubber mat, 39a...Buffering elastic body.

Claims (1)

[Scope of utility model registration request] A pedal support rod 3 is attached to the free end side of the vertically swinging arm 34 located below the footrest step 29.
6, and the pedal support rod 36 is slidably passed through a rod insertion hole 37 formed in the footrest step 29. The rod 36 is formed into a straight shaft shape, and its lower end 36a is pivotally connected to the vertically swinging arm 34 so as to be relatively swingable around a horizontal axis in a direction perpendicular to the arm swinging surface. Among the rubber mats 39 laid on the upper surface of the footrest step 29, the one at the edge of the rod insertion hole 37 is made to protrude toward the center of the hole than the edge of the rod insertion hole 37 to provide cushioning elasticity. A pedal type operating device for a working vehicle, characterized in that a body 39a is formed, and the cushioning elastic body 39a receives the side surface of the pedal support rod 36 and locks and supports the pedal support rod 36 so that it cannot fall.