JPH068741A - Pedal operation structure for working vehicle - Google Patents

Abstract

PURPOSE:To eliminate a fear of two pedals being simultaneously stepped on as rapid re-pedalling ability is maintained by providing a regulating member moved in linkage with a brake pedal and bringing a regulating member into a contact operation posture to block advance operation of an HST pedal along with pedaling of a brake pedal. CONSTITUTION:When a brake pedal 9 is stepped on, a regulating member 12 is brought into a contact operation posture to restrain and block advance pedaling operation of a HST pedal 8. Thereby, even when a foot is placed on the front of the HST pedal 8 during the second stage of pedaling operation of the brake pedal 9, an advance running state is not produced and deficiency in a power is prevented from occurring. This structure effects proximity arrangement of the two pedals 8 and 9 to each other. Further, only when the brake pedal 9 is not pedaled, the presence of the regulating member 12 causes advance pedaling of the HST pedal 8.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pedal operating structure of a working vehicle such as a lawn mower or a small transport vehicle in which a brake pedal and an HST pedal located behind the brake pedal are arranged in proximity to each other.

[0002]

2. Description of the Related Art Conventionally, as a work vehicle of this type, for example, a lawn mower disclosed in Japanese Utility Model Laid-Open No. Sho 63-178661 has been known, and it is possible to quickly switch between the HST pedal and the brake pedal. Although this has the advantage of enabling agile running operation, on the other hand, with this arrangement, the braking force may be insufficient due to the appearance of a forward running state caused by stepping on the HST pedal together with the depression of the brake pedal. was there.

[0003]

[Patent Document 1] Japanese Patent Application Laid-Open No. 3-9
In some cases, such as the one disclosed in Japanese Patent No. 2431, the brake pedal and the HST pedal are laterally spaced apart from each other to eliminate the risk of insufficient braking force. However, in this configuration, there is a disadvantage in that the above-described quick stepping property is disadvantageous, and there is another disadvantage in that the free space on the step floor is narrowed and the habitability is deteriorated. There seems to be room for improvement in the means.
An object of the present invention is to provide a pedal operation structure capable of eliminating the risk of common stepping while maintaining quick stepping ability.

[0004]

To achieve the above object, the present invention provides a brake pedal and an HS located behind the brake pedal.
In a pedal operating structure of a work vehicle in which a T-pedal is disposed in proximity, a restricting member that moves in conjunction with a brake pedal is provided, and the restricting member prevents the forward operation of the HST pedal when the brake pedal is depressed. The brake pedal and the regulating member are interlockingly connected and the regulating member and the HST are moved to a state in which the brake pedal and the regulating member are moved to the working posture, and the regulating member is moved to the retracted posture that allows the forward operation of the HST pedal when the brake pedal is released. It is characterized in that it is arranged relative to the pedal.

[0005]

In other words, when the brake pedal is depressed, the regulating member moves to the abutting action posture and the forward depressing operation of the HST pedal is restrained from being restrained. Therefore, the foot is placed on the front part of the HST pedal in the latter stage of the depressing operation of the brake pedal. Even if it occurs, the forward traveling state will not appear and the lack of braking force will be resolved. This allows the pedals to be placed close to each other in order to increase the free space on the step floor. Further, due to the presence of the restriction member, the HST pedal can be depressed forward only when the brake pedal is not depressed, and the inconvenience that the brake pedal is operated forward is not caused.

[0006]

Therefore, the brake pedal and the HST pedal can be arranged close to each other without fear of stepping on them together, and both improvement of the comfortability by solving the lack of braking force and expanding the foot placement place are improved. The pedal operation structure can be provided while obtaining a rational state in which a poor traveling state in which the vehicle is started while being braked can be effectively prevented.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to the drawings in the case of a tractor which is an example of a work vehicle. A lawn tractor is shown in FIG.
Is a driving part provided with an engine E, 3 is a front wheel, 4 is a rear wheel, 5
Is a mower, 6 is a lifting mechanism, and 7 is a mission. In this lawn tractor, the mission 7 is equipped with an HST (hydrostatic type continuously variable transmission), and an HST pedal 8 and a brake pedal 9 that control the operation thereof are arranged in the front right portion of the step floor 10. Next, the operation structure of the pedals 8 and 9 will be described.

As shown in FIGS. 1 and 3, an HST pedal 8 swingable back and forth around a horizontal axis P and a brake pedal 9 swingable back and forth around a horizontal axis X are arranged in front and rear close to each other. The brake pedal 9 and the tread surface 9a of the brake pedal 9 to the HST pedal 8
Is slightly shifted to the right of the tread surface 8a. When the brake pedal 9 is stepped forward, a brake device (not shown) is actuated to brake, and when the HST pedal 8 is stepped forward, a forward state is displayed, and when the HST pedal 8 is stepped backward, a reverse state is displayed. When released, it returns to the neutral position and stops traveling. The boss 11 of the brake pedal 9 is fitted with a restraining arm 13 having a restraining pin (corresponding to a restraining member) 12 attached to its tip, and the HST pedal tread 8a and its boss 14 have a vertical plate portion 15. The lower edge 15a of the vertical plate portion 15 is connected and fixed via the stopper plate 12 to form a stopper contact shape for cooperating with the stopper pin 12. That is, the HST pedal 9 can be depressed forward only when the brake pedal 8 is not depressed, in other words, H
Brake pedal 8 only when ST pedal 9 is neutral
The vertical plate portion 15 is formed with a recessed portion 15b for allowing the check pin 12 to enter so that the depression can be performed. The lower edge 15a is shaped so that the line can be smoothly and gently changed before and after the recessed portion 15b.

To explain the operation, when the brake pedal 9 is depressed while the HST pedal 8 is in the neutral position, the front end of the HST pedal tread 8a is accidentally depressed by the heel as shown by the phantom line in FIG. Even so, in this state, the downward projecting portion 15c of the vertical plate portion 15 and the check pin 12 are arranged so as to face each other, and the HST pedal 8
Is maintained in a neutral state. Therefore, when the HST pedal 8 is operated to move forward, the check pin 12 is moved to the vertical plate 15
Since it has entered the recessed portion 15b, the braking operation in this state is disabled. In other words, the check pin 12
When the brake pedal 9 is depressed, the HST pedal 8 is moved to a contacting posture that prevents the HST pedal 8 from moving forward, and when the brake pedal 9 is released, it moves to a retracted posture that allows the HST pedal 8 to move forward. In this state, the brake pedal 9 and the HST pedal 8 are interlocked and linked to each other and are relatively arranged.

As shown in FIGS. 2 and 3, at the front portion of the engine bonnet 16, a cooling air suction port 18 for the radiator 17 is formed. That is, the left and right side surfaces 19
A front vertical wall 20 of a hollow shape which has a net body 19 composed of four surfaces a, 19a, an upper surface 19b and a front surface 19c fixedly attached thereto and allows ventilation therethrough is detachably attached by vertically sliding an engine bonnet body. 1
It is attached to 6A. The engine bonnet body 16A is provided with a seal plate 21 that closes the open bottom surface portion of the net body 19 when the front vertical wall 20 is mounted, and the intake air from the driver's seat 22 portion is filtered by the net body 19 and taken in. Is done. Reference numeral 23 denotes a seal rubber, which closes a gap between the openable and closable upper hood 16U and a gap between the engine bonnet body 16A.

It should be noted that reference numerals are given in the claims for convenience of comparison with the drawings, but the present invention is not limited to the configuration of the accompanying drawings by the entry.

[Brief description of drawings]

FIG. 1 is a side view showing a pedal operating structure.

FIG. 2 is an exploded perspective view showing an intake structure of a radiator.

[Figure 3] Side view of the loan tractor

[Explanation of symbols]

 8 HST pedal 9 brake pedal 12 regulating member

Claims (1)

[Claims] 1. A pedal operating structure for a working vehicle, in which a brake pedal (9) and an HST pedal (8) located on the rear side of the brake pedal (9) are arranged in close proximity to each other, wherein the brake pedal (9) is provided.
A regulating member (12) that moves in conjunction with the regulating member (1) is provided, and the regulating member (1) is associated with depression of the brake pedal (9).
2) is moved to a contact action posture that prevents the forward operation of the HST pedal (8), and the brake pedal (9)
With the release of the depression of the
The brake pedal (9) and the restricting member (12) are interlockingly connected to each other and the restricting member (1) is moved to a retracted position that allows the ST pedal (8) to move forward.
2) A pedal operating structure of a work vehicle in which the HST pedal (8) is relatively disposed.