JPH10248360A - Pedal lock device for work vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a pedal locking hook from being inclined to a pedal side over a prescribed position in a state where a pedal is not stepped-on. SOLUTION: When the clutch pedal 32 of a combine is stepped-on, a main clutch is interrupted at first. When the pedal 32 is deeply stepped-on, a disk brake is operated so that the pedal 32 is provided with a restricting plate 74. Even if the pedal locking hook 68 is inclined to the pedal side unexpectedly when the pedal 32 is in a non-stepping state, the pedal locking hook 68 is abutted on the restricting plate 74 so as to prevent more movement. When the engagement recessed part 78 of the pedal locking hook 68 is hooked on the engaging part 80 which is formed in the restricting plate; 74 in a state where the pedal 32 is stepped-on by a prescribed quantity, the pedal 32 is locked to be a stepping-on state.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work vehicle provided with a pedal for operating a clutch or the like by depressing operation, and more particularly to a pedal lock device for a work vehicle provided with a pedal lock hook for locking the pedal in a depressed state. About.

[0002]

2. Description of the Related Art In a working vehicle such as a combine machine, when it is desired to temporarily stop the machine body on a slope or the like, the main clutch is disengaged by depressing a clutch pedal, and the wheels are braked by depressing the pedal further deeply. Some include a brake mechanism to which an action is applied.

For example, as shown in FIGS. 9 and 10, the clutch pedal 32 is moved from its pivot point 34 to the plate 3.
5. When the clutch pedal 32 is depressed, the tight arm 39 is connected to the tight arm 39 via the rod 37.
The belt clutch is disengaged and the engine pulley 24
The power transmission from a to the HST pulley 41 is cut off. When the clutch pedal 32 is depressed deeply, the brake rod 43 operates the brake mechanism.

On the other hand, when the parking brake lever 46 is pulled forward with the clutch pedal 32 depressed, a hook 68 is attached to the pin 45 attached to the clutch pedal 32.
Is hooked, the parking brake is applied, and when the clutch pedal 32 is depressed again, the hook 68 comes off and the parking brake is released.

[0005]

However, according to the above-mentioned prior art, the hook 68 is connected to the clutch pedal 32.
The shaft 72 is rotatably pivoted in a direction away from the clutch pedal 32 and is always urged by a spring (tensile) 72.
In the non-depressed state, the hook 68 falls toward the front side of the clutch pedal 32 and enters the lower side of the pedal 32. If the clutch pedal 32 is erroneously depressed in this state, the depressed force causes the hook 68 and the like to depress. There was a risk of deformation.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and an object of the present invention is to prevent a pedal locking hook from falling over a predetermined position to the pedal side when the pedal is not depressed. It is another object of the present invention to provide a pedal lock device for a work vehicle.

[0007]

In order to achieve this object, the present invention provides at least one of an on / off operation of a main clutch (40) of a drive system and a braking operation by a brake mechanism (44) by a stepping operation. Work, and a pedal lock hook (68) capable of forcibly moving the pedal (32) to lock the pedal (32) in a depressed state. In the vehicle (10), when the pedal (32) is not depressed, the pedal locking hook (68) prevents the pedal (32) from moving beyond the interference position with the pedal (32). When the pedal (32) is depressed by a predetermined amount or more, the pedal (32) is provided with a stopper / lock means capable of locking the pedal (32) in the depressed state. The features.

Further, in the present invention, the stopper / lock means is formed on a regulating plate (74) with which the pedal locking hook (68) abuts near the interference position, and on the regulating plate (74), And an engagement portion (80) with which the pedal lock hook (68) can be engaged.

(Operation) In the above configuration, when the work vehicle (10) of the present invention depresses, for example, the pedal (32), the main clutch (40) of the traveling system is first disengaged.
When the pedal (32) is further depressed deeply, the brake mechanism (44) is activated.
When the pedal locking hook (68) is hooked on the pedal (32) while the pedal (32) is depressed, the pedal (32)
Is locked in the depressed state.

The pedal (32) is provided with stopper / lock means (74, 80). When the pedal (32) is not depressed, the pedal locking hook (68) is provided. Even if the pedal is inadvertently fallen to the pedal side, the pedal locking hook (68) abuts against the stopper / locking means (74, 80) to prevent further movement of the pedal locking hook (68), Also,
In a state where the pedal (32) is depressed by a predetermined amount or more,
The stopper / lock means (74, 80) enables the pedal (32) to be locked in a depressed state.

Note that the reference numerals in parentheses described above are shown for reference to the drawings, and do not limit the invention specifying matter of the present invention.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. Note that members that are the same as or correspond to those of the above-described related art are denoted by the same reference numerals and described.

As shown in FIGS. 1 and 2, a combine 10 for cutting, threshing, and storing grain stalks is driven by a crawler traveling device 14 mounted on the traveling frame 12 while moving in front of the traveling frame 12. The grain stalk is cut by a cutting unit 16 attached to the unit, the grain stalk is threshed by a threshing unit 18 disposed in the center of the machine body, and the threshed grains are stored in a grain tank 20.

An operator's seat 22 is disposed at an intermediate portion between the cutting section 16 and the grain tank 20, and an operation lever 26 and the like are provided at a front portion of the operator's seat 22. 24 are mounted. In addition, traveling frame 1
2, the driving frame 12 is located below the driver's seat 22.
The fuel tank 30 is housed inside the operation frame 12a.

FIG. 3 is an exploded view of the drive system, showing a connection state between the clutch pedal and the brake mechanism. Power from the engine 24 is transmitted from the PTO shaft 52 to a main shaft 56 on the transmission 54 side, and pulleys 53 and 57 are fixed to the PTO shaft 52 and the main shaft 56, respectively.
A main clutch 40 of a traveling system is provided between 3 and 57, and power transmission from the engine 24 to the transmission 54 is controlled via the main clutch 40.

The power transmitted to the transmission 54 is transmitted to a plurality of drive shafts 5 in the transmission 54.
8 through 62 to the drive shaft 64, and further through the sprocket 66 to the left and right crawler traveling devices 1.
4, 14 are driven.

The clutch pedal 32 to be depressed is
The main clutch 40 is connected via one link mechanism 36.
The clutch pedal 32 is connected to the left and right disc brakes 44 via the other link mechanism 38. It should be noted that a parking brake lever 46 described later is also connected to the disc brake 44.

FIGS. 4 and 5 are side views of the step 23, which is the foot resting surface of the driver's seat 22. When the clutch pedal 32 is depressed, the pedal arm 32a pivots about the fulcrum shaft 34. The main clutch 40 rotates clockwise, and the main clutch 40 is disconnected via the link mechanism 36.

At this time, when the clutch pedal 32 is depressed deeply, the brake arm 42 is operated via the link mechanism 38 by the further rotation of the pedal arm 32a, and the disc brake 44 is activated. In front of the clutch pedal 32, a pedal locking hook 68 for locking the clutch pedal 32 in a depressed state is provided.

The pedal locking hook 68 is formed in a substantially rectangular shape when viewed from the side, is rotatable about a fulcrum shaft 70, and is constantly urged clockwise in the figure by a torsion coil spring 72. Then, with the clutch pedal 32 depressed deeply, the pedal locking hook 68
Is engaged with the clutch pedal 32, the clutch pedal 32 can be locked in a depressed state. This will be described later.

On the other hand, the body can be stopped also by operating the parking brake lever 46. When the parking brake lever 46 is rotated clockwise in FIG. , The disc brake 44 of the right wheel operates, for example.

In the present embodiment, the pedal lock hook 68 is prevented from moving beyond the interference position with the pedal 32 when the pedal 32 is not depressed. In addition, a stopper / lock means is provided which can lock the pedal 32 in the depressed state when the pedal 32 is depressed by a predetermined amount or more.

As shown in FIGS. 5 and 6, a projection 76 is provided at an intermediate portion of the pedal locking hook 68 formed in a rectangular shape, and the projection 76 and the base end of the pedal locking hook 68 are provided. An engagement recess 78 is formed between the side arm 68a. Also, the clutch pedal 32 includes
A regulating plate 74 having a predetermined width is provided so as to protrude to the side, and an engaging portion 80 having a slightly notched upper portion is formed on the upper surface of the regulating plate 74.

The width of the regulating plate 74 is such that when the pedal lock hook 68 is rotated about the fulcrum shaft 70 so as to approach the pedal 32 side (counterclockwise in the drawing), the pedal lock hook The size of the tip 68 is determined so as to abut on the regulating plate 74.

In the non-depressed state of the clutch pedal 32, even if the pedal locking hook 68 tries to rotate in the counterclockwise direction in FIG.
The free end 68b abuts on the regulating plate 74,
Rotation beyond the interference position with the regulating plate 74 is prevented.

Further, by depressing the clutch pedal 32 by a predetermined amount, the pedal 32 is rotated clockwise in the figure around the fulcrum shaft 34, and in this state, the pedal locking hook 68 is forcibly moved to the pedal 32. If the clutch is turned so as to approach (counterclockwise), the engaging concave portion 78 of the pedal locking hook 68 can be hooked and engaged with the engaging portion 80 of the regulating plate 74. 32 can be locked in the depressed state. The restricting plate 74 and the engaging portion 80 constitute stopper / locking means.

Next, the operation of the present embodiment will be described.

For example, when the clutch pedal 32 of the combine 10 is depressed, the main clutch 40 of the traveling system is first disengaged, and when the pedal 32 is further depressed, the disc brake 44 is actuated and the machine stops. ing.
However, when the depression of the clutch pedal 32 is released, the pedal 32 returns to its original state, and the braking action by the brake is released. Therefore, even if the depression operation of the clutch pedal 32 is released by the operation while sitting in the driver's seat. A pedal lock hook 68 that can be locked in a state where the pedal is depressed is used.

That is, when the vehicle is to be temporarily stopped while traveling on a hill or the like while traveling on a road, and it is desired to maintain the state, the pedal 32 is depressed from the non-depressed state (position A) in FIG. The pedal lock hook 68 is displaced to the depressed state (position B), and the pedal lock hook 68 is then moved from the original position (position C) against the biasing force of the torsion coil spring 72 toward the front side (reverse position). (Clockwise). The engaging recess 78 of the pedal locking hook 68 is connected to the regulating plate 7 attached to the pedal 32.
4 (the D position). Then, the clutch pedal 32 is slightly moved in the original direction by an amount corresponding to the play amount and then locked.

Thus, even if the pedal 32 is released, the pedal 32 will not return to its original position because the pedal 32 is locked by the pedal locking hook 68. The main clutch 40 is disengaged, and the disc brake 44 is actuated, so that the aircraft remains stopped.

Next, when it is desired to release the lock, the pedal 32 is depressed by an amount corresponding to the play amount.
4 is disengaged from the engagement portion 80, and the pedal lock hook 68 returns to the original position by the urging force of the torsion coil spring 72, so that the lock is released.

On the other hand, when the clutch pedal 32 is in the non-depressed state, the biasing force is weakened, for example, by the torsion coil spring 72 being slackened, so that the pedal locking hook 68 comes closer to the pedal 32 side carelessly. When it has been turned, the free end 68a of the pedal locking hook 68
Is in contact with the regulating plate 74, and therefore does not rotate beyond this contact position.

Therefore, even if the clutch pedal 32 is accidentally depressed in this state, the pedal lock hook 6
8 simply rotates in the same direction as the pedal 32 in a state in which the hook 68 is in contact with the pedal 32, so that the hook 68 is not likely to be deformed.

Next, FIGS. 7 and 8 show the storage structure of the fuel tank 30. FIG.

As shown in these figures, as shown in FIG.
2a, the fuel tank 30 is housed therein. The upper portion of the fuel tank 30 is covered in a step 23, and the upper surface of the step 23 is provided with a floor mat 25.
Is glued. An opening 23a is formed at the front of the step 23. A fuel supply port 30a protrudes upward from the opening 23a, and a cap 27 is attached to the fuel supply port 30a.

The cap 27 is provided with a detachable refueling port guard 31 which serves both as a mudguard and a protection. The upper surface of the refueling port guard 31 is inclined so that the driver side is lowered, so that the driver during the operation can be operated. It is formed so that the driver can ride comfortably on the foot. This filler guard 31 is used in step 2
3 and a floor mat 25 are opened, and pins 33 are inserted into the holes and attached.

According to this embodiment, the fuel filler guard 3
In order to fix 1, for example, a hole is made in step 23 and a grommet is adhered, and the grommet is filled with a filler guard 31.
With respect to the means for inserting the pin, the grommet can be eliminated, the number of parts can be reduced, and the cost can be reduced.

[0038]

As described above, according to the present invention, when the pedal is depressed, the pedal locking hook for holding the pedal in the locked state when the pedal is not depressed determines the interference position with the pedal. A stopper / locking means for locking the pedal in the depressed state when the pedal is depressed by a predetermined amount or more is provided, so that the pedal locking hook is released from the pedal. Even when the spring biased to the pedal is bent, the hook does not enter the lower side of the pedal beyond the interference position where it comes into contact with the pedal, so that the hook is deformed when the pedal is depressed. It is possible to prevent the risk of being caused.

Further, the stopper / locking means includes a regulating plate with which the pedal locking hook abuts in the vicinity of the interference position with the pedal, and an engagement formed on the regulating plate, with which the pedal locking hook can be engaged. With this configuration, it is possible to prevent the pedal locking hook from accidentally entering the lower side of the pedal with a simple configuration, and it is possible to reliably lock the pedal by the engaging portion. .

[Brief description of the drawings]

FIG. 1 is a side view of a combine to which the present invention is applied.

FIG. 2 is a plan view of FIG.

FIG. 3 is a development view showing the entire drive system.

FIG. 4 is a side view of a driver's seat step portion, showing a positional relationship between a clutch pedal and a pedal locking hook.

FIG. 5 is a side view showing a state where the clutch pedal is locked by a pedal locking hook.

FIG. 6 is a front view of a main part of FIG. 5;

FIG. 7 is a side view of a combine tank with a fuel tank attached.

FIG. 8 is a plan view of FIG. 7;

FIG. 9 is a view showing a conventional example of an arrangement relationship between a clutch pedal and a parking brake lever.

FIG. 10 is a diagram showing a conventional example in a state where a parking brake lever is hooked on a clutch pedal and the clutch pedal is locked.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Combine 12 Running frame 14 Crawler running device 22 Driver's seat 23 Step 32 Clutch pedal 34 Support shaft 36, 38 Link mechanism 40 Main clutch 44 Disk brake 46 Parking brake lever 68 Pedal lock hook 70 Support shaft 72 Torsion coil spring 74 Regulation plate 76 Projection 78 Engagement concave part 80 Engagement part

Claims (2)

[Claims] A pedal for operating at least one of an on / off operation of a main clutch of a drive system and a braking action by a brake mechanism by a depressing operation; and a pedal forcibly moved toward the pedal to operate the pedal. A pedal lock hook that can be locked in a depressed state, wherein the pedal lock hook moves to a position beyond an interference position with the pedal when the pedal is not depressed. And a stopper / lock means capable of locking the pedal in a depressed state when the pedal is depressed by a predetermined amount or more, the pedal lock device for a work vehicle. 2. The stopper / locking means includes: a regulating plate with which the pedal locking hook abuts near the interference position; and an engaging portion formed on the regulating plate, with which the pedal locking hook can engage. The pedal lock device for a work vehicle according to claim 1, comprising: