JP2515184Y2 - Pedal stepping device for hydraulically driven passenger work vehicle - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a pedal stepping device in a hydraulic drive type passenger work vehicle in which a driver gets into a machine and operates.

[Conventional technology]

The hydraulically driven passenger work vehicle is configured to determine the traveling speed by adjusting the flow rate of the hydraulic pump according to the depression amount of a pedal provided on the footrest plate of the driver's seat.

For example, in lawnmowers, when lawn mowing work is performed at a golf course or the like, the lawn mower is run at a low speed, and when lawn mowing work is not performed at the time of loading and unloading, the lawn mower is run at a high speed. In the former lawn mowing work, running the lawn mower at a constant speed is a condition for making the lawn surface beautiful.

At the time of lawnmower work, the amount of pedal depression is kept constant by fine adjustment of the driver's toes, which allows the lawn mower to be kept running at a constant low speed.
The position of the foot on which the pedal is depressed is not constant over a long period of time, which may change the traveling speed of the lawn mower during work.

In addition, other hydraulically driven passenger work vehicles such as tractors, work transport vehicles, and bunker rakes must be kept at a certain low speed during work, and must be run at high speed during non-work. There is.

On the other hand, Japanese Utility Model Publication No. 60-155638 discloses a technique related to the present invention. That is, in order to ensure running stability during high-speed running of an automobile, a plurality of convex portions are radially formed on the lateral side wall of the accelerator pedal at predetermined intervals and the accelerator pedal is depressed to obtain a desired speed. In this state, only the tip end portion of the foot is shifted to the side wall side, and the tip end portion is inserted between the convex portions to maintain the desired speed.

In this technique, it is necessary to laterally shift only the tip of the foot, the ankle is slightly twisted, and the tip of the foot partially enters between the adjacent convex portions,
Its heel is supported by the floor and the rest of the foot is unsupported. For this reason, the posture of the foot for maintaining a constant speed is still unstable, and when inserting the tip of the foot between the convex portions, the selection of the insertion position is stepwise. You can only do it.

[Problems to be solved by the device]

The present invention provides a hydraulically driven passenger work vehicle in which the pedal depression amount during work is always constant in a stable state without finely adjusting the pedal depression amount by the toes. An object of the invention is to keep the traveling speed constant so that various works can be performed stably and uniformly.

[Means for solving the problem]

Means adopted by the present invention to solve the above problems are
In a hydraulically driven passenger work vehicle configured to determine the traveling speed by adjusting the flow rate of the hydraulic pump according to the amount of depression of the pedal provided on the footrest plate of the driver's seat, in the portion of the footrest plate behind the pedal. That is, a foot rest for keeping a constant depression amount of the pedal is provided, and the pedal is provided with an extension portion greatly extended to the side of the foot rest.

[Function of device]

At the time of work, a foot is placed on a foot rest provided on a rear portion of the pedal, and the foot is depressed to perform the work. By the action of the footrest, the position of the foot is stably held at a fixed position, so that the pedal depression amount is constant. This allows the work vehicle to travel while maintaining a constant low speed to perform various kinds of work.

In addition, the pedal provided on the footrest plate of the driver's seat is provided with an extended part that extends greatly to the side of the footrest provided on the rear part of the pedal, so when not in work If you push the pedal extension with a slight lateral displacement, the ankle will not be twisted at all, and the pedal depression amount will be greater than during work, and the work vehicle will travel at high speed.

〔Example〕

Hereinafter, the present invention will be described in more detail with reference to an example implemented in a lawnmower.

FIG. 1 is a perspective view of a three-wheel lawn mower embodying the present invention during lawn mowing work, in which a pair of drive wheels 2 are attached to the front part of a machine body 1, and one driven wheel is provided behind it. (Not shown) is installed. One cutting unit U is mounted on the lower part of the driver's seat in the machine body 1, and a pair of cutting units U is mounted in front of it in a lateral direction.

This lawnmower is of a hydraulic drive type, and its drive conceptual diagram is shown in FIG. That is, the hydraulic pump P is rotated by the engine 3 mounted on the rear portion of the machine body 1, the pair of hydraulic motors M is rotated by the hydraulic pump P, and the drive wheels 2 are directly connected to the output shaft 4 of the hydraulic motor M. There is. In this lawnmower, the main body of the hydraulic motor M itself constitutes the frame of the machine body 1. Each of the hydraulic pump P and the hydraulic motor M is a variable flow rate type and has a structure in which pressure oil flows in both forward and reverse directions. The hydraulic pump P changes its flow rate according to the amount of rotation of a flow rate adjusting shaft (also referred to as a trunnion shaft) [not shown], and the forward and reverse rotation of the flow rate adjusting shaft causes
It has a structure in which the direction of pressure oil changes.

Further, as shown in FIG. 1, FIG. 3, FIG. 4, and FIG. 7, the portion of the footrest plate 5 provided on the driver's seat of the machine body 1 on which the right foot is placed has the hydraulic pump P A front pedal 6 and a rear pedal 7 for rotating the flow rate adjusting shaft are provided. That is, the front pedal 6 and the rear pedal 7 are connected to the rotary shaft 11 provided below the footrest plate 5 via the arms 8 and 9, respectively, and the front pedal 6 or the rear pedal 7 is depressed. The rotation shaft 11 rotates, and the rotation of the rotation shaft 11 causes the flow rate adjusting shaft of the hydraulic pump P to rotate. When the front pedal 6 is stepped on, pressure oil flows out from the hydraulic pump P in the forward direction, the lawn mower moves forward, and when the rear pedal 7 is stepped on, pressure oil flows out from the hydraulic pump P in the opposite direction.
The lawn mower goes backwards.

Between the front pedal 6 and the rear pedal 7 of the footrest plate 5, a footrest 12 that is inclined so as to have a front height is provided. The front pedal 6 is provided with an extended portion 6a that is greatly extended to one side of the footrest 12, and the extended portion 6a
Is wider than the other parts to facilitate the stepping operation.

FIG. 3 is a plan view of the front pedal 6 and the footrest 12 during lawn mowing work, and FIGS.
FIG. 4 is a cross-sectional view taken along line XX in FIG. 3 during stop, during lawn mowing work, and during non-lawn mowing work. 7 and 8 are perspective views of the front pedal 6 and the footrest 12 during lawn mowing work and non-lawn mowing work, respectively.

Then, when performing lawn mowing work, as shown in FIGS. 5 and 7, the foot F of the driver A is placed on the footrest 12 and the front pedal 6 is depressed by the foot Fa to work. I do.
By the action of the footrest 12 that is inclined so that it is at the front height,
Since the position of the toe Fa that depresses the front pedal 6 is stably maintained at a constant position, the depression amount of the front pedal 6 is constant even if the lawn mowing work is performed for a long time. As a result, the lawn mower can be run at a constant low speed to perform lawn mowing work, so that the surface of the mowed lawn becomes beautiful.

Further, when the lawnmower is carried in or out of a golf course or the like, as shown in FIGS. 6 and 8, the entire foot F of the driver A is slid sideways as it is. When the extension 6a of the front pedal 6 is depressed on the footrest plate 5 in this state, the depression amount of the front pedal 6 can be made larger than that during the lawn mowing work, whereby the lawnmower travels at a high speed.

In FIG. 1, reference numeral 13 denotes an elevating pedal for elevating the cutting unit U, which is depressed by the left foot of the driver A.

Further, in the above-described embodiment, the present invention is applied to a lawnmower, but the present invention is of a hydraulic drive type in addition to the lawn mower, and the driver is boarded in the machine to perform the work. It can also be applied to tractors, work carriers, bunker rakes, etc.

[Effect of device]

In the pedal stepping device according to the present invention, a footrest for maintaining a constant pedaling amount is provided at a rear portion of the pedal on a footrest plate of a driver's seat, and the pedal is Since the extension part which extends greatly to the side of the footrest is provided, at the time of work, most of the driver's foot (a part excluding the toes) is placed on the footrest and the toes of the foot rest. By depressing the pedal with, the foot position can be stabilized and the pedal depression amount can be made constant, and the running speed of the work vehicle can be maintained at a constant low speed. By depressing the extension portion of the pedal while slightly shifting the position as it is, the amount of depression can be made larger than that at the time of work, and the work vehicle can be run at high speed. In addition, since the driver's ankles are in a natural state with no twist during both working and non-working, the driver does not feel tired even during continuous driving.

In this way, in the hydraulically driven passenger work vehicle, without delicately adjusting the amount of depression of the pedal by the toes,
With the effect of the footrest, the work vehicle can be run and various work can be performed while the pedal depression amount is kept constant and a constant low speed is maintained, so stable and uniform work is performed. be able to.

[Brief description of drawings]

FIG. 1 is a perspective view of a three-wheeled riding lawn mower according to the present invention during lawn mowing work, and FIG. 2 is a conceptual diagram of hydraulic drive.
FIG. 3 is a plan view of the front pedal 6 and the footrest 12 during a lawn mowing operation, and FIGS. 4 to 6 show the front pedal 6 and the footrest 12 during a mowing operation and a lawn mowing operation, respectively. 3 is a cross-sectional view taken along line XX of FIG. 3, FIG. 7 and FIG.
FIG. 3 is a perspective view of a portion of a footrest 12 and. The description of the reference numerals of the main parts constituting the present invention is as follows. A: Driver, F: Foot, Fa: Toe M: Hydraulic motor, P: Hydraulic pump 5: Footrest plate, 6: Front pedal (pedal) 6a: Front pedal extension 12: Footrest

Claims (2)

(57) [Scope of utility model registration request] 1. A hydraulically driven work vehicle having a structure in which a traveling speed is determined by adjusting a flow rate of a hydraulic pump according to a depression amount of a pedal provided on a footrest plate of a driver's seat. While providing a foot rest on the rear part of the pedal, the pedal is provided with an extension portion greatly extended to the side of the foot rest, and at the time of work, by placing a foot on the foot rest and stepping on the pedal, While keeping the amount of depression constant to keep the traveling speed constant,
A pedal depressing device for a hydraulically driven passenger work vehicle, wherein the pedal depressing device is configured to travel at a high speed by depressing an extended portion of the pedal deeper than when in a non-working period. 2. The pedal stepping device for a hydraulically driven passenger work vehicle according to claim 1, wherein the footrest is inclined so as to have a front height.