JPH11105684A - Brake pedal connection device for work vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate operation, make receiving difficult of scattering of mud or the like, by associating a pedal connecting link connecting and disconnecting between a pair of right/left brake pedals, by a dash board covering a steering post part or an operating lever provided in an upper part of a column cover. SOLUTION: Around a pedal shaft 26 provided in a right/left brake pedal 1, 2, each pedal boss 21, 28 is provided, in a pin holder 29 of the pedal boss 27, a lock pin 33 is provided by a wire 31 interlocked with an operating lever 5. This lock pin 33 is engaged with a pin hole 34 of a lock bracket 30 of the pedal boss 28, to serve as a connecting link 3 of the brake pedals 1, 2. The operating lever 5 is provided in a side surface of a bracket 35 of a steering post 4, to be protruded from a lever guide hole 37 of a column cover 6 covering the steering post 4. Accordingly, the operating lever 5 is placed in a position easily operated and in a high position, by being covered with the column cover 6, scattering of mud, muddy water, etc., is prevented from being easily received.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a brake petal connecting device for braking left and right driving wheels of a working vehicle such as a tractor, a rice transplanter, a lawn mower, and the like.

[0002]

A petal connector for connecting and disengaging a pair of brake petals for braking the left and right drive wheels respectively is provided near a step floor where the brake petal is located (see FIG. 1). No. 59-187554), but soil and dust are remarkably scattered, making it difficult to maintain a smooth operation.

[0003]

According to the present invention, a petal connector 3 for connecting and disconnecting a pair of left and right brake petals 1 and 2 is provided on an upper portion of a dashboard or column cover 6 which covers a steering post 4. A brake petal connection device for a work vehicle that is linked by the operation lever 5 is configured.

[0004]

In order to connect or disconnect the left and right brake petals 1 and 2, the operation lever 5 on the upper part of the dashboard 4 is used.
Is operated to switch the connecting tool 3. The operation lever 5 is located above the dashboard or column cover 6 that covers the steering post 4, so that the operator can easily perform the operation, and can perform a quick and accurate operation. In addition, since the operation lever 5 is located above the dashboard or column cover 6, the operation lever 5 is located at a high distance from the step floor, and is not easily scattered by mud or the like, and can maintain a smooth operation.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to an agricultural tractor as a working vehicle. The tractor body 7 has an engine disposed under a front hood 8 and a clutch housing 9 and a transmission case 10 connected to the rear side of the engine. , The rear wheels 11 and the front wheels 12 are driven, and the PTO shaft 13 on the rear side of the transmission case 10 is transmitted.
A seat floor 15 is provided between the pair of left and right fenders 14 on the rear wheel 11, and a cockpit 16 is provided on the upper side.

A step floor 17 is formed on the front side of the seat floor 15, and a column cover for covering a steering post 4 for supporting a steering shaft 19 of a steering handle 18 between the front side of the step floor 17 and the hood 8. 6 and the dashboard 20 are arranged. By operating the steering wheel 18, the front wheels 12
The instrument panel 21 is disposed at the upper end of the dashboard 20. A pair of left and right brake petals 1,
2 is disposed on the right foot side of the step floor 17, and the clutch petal is provided on the left foot side.

A pair of left and right brakes 22 and 23 operated by the brake petals 1 and 2 are connected to a rear axle housing 2 projecting right and left outside of the transmission case 10.
4 and are interlocked with the corresponding brake petals 1 and 2 by a brake interlocking mechanism 25. The left and right brake petals 1, 2 are provided with a horizontal petal shaft 26 below the dashboard 20, and the respective petal bosses 27, 28 are rotatably provided around the petal shaft 26 so as to be suspended.

A pin holder 29 and a lock bracket 30 are integrated with each of the petal bosses 27 and 28, and the pin holder 29 of the left petal boss 27 is moved in and out of the spring 32 by a wire 31 interlocked with the operating lever 5. A lock pin 33 is provided, and the lock pin 33 is
By engaging with the pin hole 34 of the lock bracket 30 of the petal boss 28 with a tension force of 2, the connecting tool 3 can integrate the left and right brake petals 1 and 2.
Further, by pulling the wire 31 against the spring 32 with the operation lever 5 to remove the lock pin 33 from the lock bracket 30, the left and right brake petals 1 and 2 can be operated separately.

The operating lever 5 is provided on the side surface of a bracket 35 of the steering post 4 for rotatably supporting the upper portion of the steering shaft 19 so as to be rotatable up and down around a horizontal lever shaft 36. Turned to the side.
A lever guide hole 37 is provided on the rear side surface of the column cover 6 that covers the steering post 4 so as to be longer in the vertical direction, and the operation lever 5 projects rearward from the lever guide hole 37.

A limit switch 38 is provided in the column cover 6 near the lever shaft 36 of the bracket 35, and is turned ON and OFF by moving the operation lever 5 up and down. The operation position of the operation lever 5 by the limit switch 38 and the state of connection and disengagement of the lock pin 33 can be displayed on the upper instrument panel 21 by lighting.

As described above, the petal shafts 26 of the brake petals 1 and 2 are located above the step floor 17, and the brake petals 1 and 2 are provided in a suspended state. 28, a lock pin 33 or the like as the connecting tool 3 is formed.
Since the operation lever 5 for performing the operation of moving in and out is provided in the upper portion of the column cover 6, the operation lever 5 is located at a position where the operator can easily operate, so that quick and accurate operation can be performed. The pivot portion of the operation lever 5 to the lever shaft 36 is located at a high position above the running ground and is covered with the column cover 6, so that it is less likely to be scattered by mud or muddy water and maintains a smooth lever operation. it can.

The connection state of the brake petals 1 and 2 of the connecting member 3 by the operation lever 5 is shown in FIG.
Since the information is displayed on the instrument panel 21 on the zero, it is easy to confirm and an accurate operation can be performed. Further, since the limit switch 38 for this purpose is also provided in the upper part of the column cover 6, it is hardly scattered by muddy water or the like. In the illustrated example, the operation lever 5 is provided on the column cover 6. However, the operation lever 5 may be provided in the same configuration within the upper part of the dashboard 20 on the left and right sides of the column cover 6, and have the same effect.

Numeral 39 denotes a rotary tilling device which is connected to a connecting link 41 which is lifted and lowered by a lift arm 40 on the rear side of the vehicle body 7, and which can be tilled by transmission from the PTO shaft 13. In FIG. 3, the difference from the above example is that, in the configuration of the step floor 17 which is mounted on the vehicle body 7 with the mount rubber 42 interposed therebetween, the step floor 17 is provided on the dashboard 20 part integrated with the step floor 17 side. When the brake pedal 1 is depressed, the mount rubber 42 operates to increase its elasticity. When the brake pedal 1 is released, the elastic force of the mount rubber 42 is weakened, and the vibration damping effect is maintained high. The mount rubber 42
Are arranged directly between the left and right two places at the front of the step floor 17 and the two left and right places at the rear of the seat floor 15 or indirectly via an upper frame or the like to support them.

The mounting rubber 42 includes a bracket 43 integrated with the clutch housing 9 and a dashboard 2.
Step floor 17 integrated with seat floor 0, seat floor 15, etc.
The step floor 17 and the like are supported by being interposed between the brackets 44 and 44. 45 is each of these brackets 43,
The control bolt 44 is inserted vertically through the center of the mount rubber 42 and the mount rubber 42 to prevent horizontal displacement of each part.

A hollow portion 46 is formed in the mount rubber 42 so that oil or air can be supplied or discharged from a cylinder 47. 48 is this cylinder 4
The piston 7 is connected to the brake petal 1, and when the steering brakes 22 and 23 of the rear wheel 11 are braked by depressing the brake petal 1, the hydraulic pressure or air pressure from the cylinder 47 changes the mount rubber 42. , The elastic force of the mount rubber 42 is hardened. For this reason, sinking, vibration, and swinging of the step floor 17 and the seat floor 15 when the brake pedal 1 is stepped on are reduced, and stable operability is achieved. A hose 49 communicates between the cylinder 47 and the mount rubber 42.

The cylinder 47 is operated by switching a control valve of an air circuit or a hydraulic circuit to change the hardness of the mount rubber 42, and this control valve is turned on when the brake pedal 1 is depressed. , A limit switch that is turned off.
The hardness of the mount rubber 42 is the same as that of the brake petal 1.
, But it may be configured to be performed by depressing one of the left and right brake petals 1 and 2, and further may be configured to be performed by depressing a clutch petal.

In FIG. 4, a different point from the above example is that the left and right brake petals 1, 2 and the clutch petals are provided with a potentiometer 50 for detecting a stepping operation. The mount rubber 42 is controlled so that its elasticity is hardened.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an interlocking portion of a brake petal and an operation lever portion, and a rear cross-sectional view of a lock pin portion thereof.

FIG. 2 is a side view of the tractor.

FIG. 3 is a side view of a brake petal part showing a partly different embodiment, and a sectional view of a part thereof.

FIG. 4 is a side view of a brake petal part showing another embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Brake petal 2 Brake petal 3 Petal connection tool 4 Steering post 5 Operation lever 6 Dashboard or column cover

Claims (1)

[Claims] 1. A petal connector 3 for connecting and disconnecting a pair of brake petals 1 and 2 for braking left and right drive wheels 11 and 11 respectively, an upper part of a dashboard or column cover 6 covering a steering post 4 part. A brake petal coupling device for a working vehicle, which is interlocked with an operation lever 5 provided in the vehicle.