JPS6313529Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a pedal device for a forward-reverse convertible tractor for avoiding interference between a pedal tread and a seat.

In a forward-reverse conversion type tractor that is operated by changing its posture between forward and reverse positions, a reverse brake pedal and a clutch pedal are located near the forward seat attachment part, and the footplates of these pedal devices are placed close to the floor. If it protrudes too high from the seat, it may interfere with the forward seat when installed, making installation difficult.

Therefore, it is conceivable to have a structure in which the pedal tread is pivoted to the stem so that it can be raised and lowered, and the raised position is maintained with pins or bolts, but this is difficult to manufacture, difficult to raise and lower, and requires many parts to be attached and detached. It has various problems such as easy powder loss and a large number of parts.

In view of the above-mentioned problems, the present invention aims to provide a pedal device for a forward/backward convertible tractor that has a small number of parts and detachable parts, and is easy to manufacture and raise/lower. This is a forward/reverse converting type tractor which is provided with a reverse pedal device A having a stem 25 and a treadle 24 at its upper end near the forward seat attachment portion 18F.
In order to allow the tread plate 24 to be raised and lowered freely relative to the tread plate 2
The mounting part 28 formed on the lower surface of the treadle 4 is pivotally supported on the stem 25 via a pivot 29, and the mounting part 2
8 is formed with a groove 28b into which the stem 25 can freely enter,
Another feature is that the tread plate 24 is provided with an engaging member 26 that detachably engages with the stem 25 to hold the tread plate 24 in an upright position.

Embodiments of the present invention will be described below with reference to the drawings.

1 and 2, a vehicle body 2 of a forward/reverse convertible tractor 1 is constructed by connecting an engine 3, a clutch housing 4, and a transmission case 5, and the engine 3 is covered with a bonnet 6. A rear bonnet 7 in which a battery is housed is provided at the rear.

Reference numeral 8 indicates a front wheel, 9 indicates a rear wheel, and 10 indicates a rear wheel fender. A hydraulic system 11 for lifting and lowering the work machine is mounted on the rear upper part of the transmission case 5. From above the hydraulic system 11, the left and right flanks of the transmission case 5 are A floor sheet 12 is provided across the vehicle, and left and right steps 13 extend forward from the lower front end of the floor sheet 12.

Clutch pedal 16F is on the left step 13
However, a pair of left and right brake pedals 17F are arranged on the right step 13, a seat 19F is provided on the upper surface of the floor seat 12 above the hydraulic system 11 via a mounting part 18F, and a seat 19F is provided on the lower part of the rear bonnet 7. A handle device 21F is provided on the upper surface of the mission case 5 via a mounting portion 20F. These clutch pedal 16F, brake pedal 1
7F, mounting parts 18F, and 20F are for the forward posture, and the tractor 1 is equipped with a similar one for the backward posture, and the operating force transmission system is the same so that it can be operated from both sides. The seat 19F and the handle device 21F are configured so that a set of each is used by changing the mounting position.

Near the attachment portion 18F of the forward seat 19F, there are attachment portions 20R for the reverse clutch pedal 16R and reverse steering wheel device 21R on the right side, and left and right attachment portions 20R on the left side.
A pair of reverse brake pedals 17R are respectively arranged. In FIG. 2, reference numeral 22 denotes a pair of left and right brake master cylinders, which are configured to actuate the cylinders 22 and brake the rear wheels 9 when either of the forward/reverse brake pedals 17E, 17R is depressed.

In addition, the seat 19 and the handle device 21 are arranged in the forward posture state in FIG. 1 and in the backward motion state in FIG. 2.

When the forward seat 19F is attached to the mounting portion 18F, the reverse clutch pedal 16R and brake pedal 17R will interfere with the seat 19F as shown in FIGS. 1 and 2. To avoid this, Each pedal device has a treadle 24 that can be raised or lowered, and is configured such that the height of the pedal device protruding from the floor seat 12 can be reduced by placing the pedal in an inverted position.

In the first embodiment shown in FIGS. 3 to 5,
The brake pedal 17 and other pedal devices 4 include a stem 25 that is pivotally supported on the vehicle body 2, and a pivot 29 at the upper end of the stem 25.
The footboard 24 has a footboard 24 that is pivotally supported to be able to rise and fall freely via the treadle plate 24, and an engagement member 26 that holds the footboard 24 in an upright position with respect to a stem 25.

The left brake pedal 17 is located on the bottom surface of the footboard 24.
A connecting rod receiver 27 and a mounting portion 28 are provided for engaging a connecting rod (not shown) for simultaneously stepping on the levers.

The mounting portion 28 is formed by welding a U-shaped member in a plan view, and is open at the front in the stepping direction, and a groove 28b into which the stem 25 can freely enter is formed in the rear wall 28a. This mounting portion 28 is pivotally supported on the upper end of the stem 25 via a pivot 29, and is rotatable in the direction of FIG. , the groove 28b fits into the stem 25, and the inner part of the groove 28b is the stem 2.
5 (imaginary line state), the treadle 24 is in an inverted position, and at that time, the treadle 24 is in contact with the stem 25
The position will be lower than the top of the .

The engagement member 26 has a pair of left and right curved spring plates 32 welded to a flat plate 31 facing each other, and the flat plate 31 is welded (or bolted) to the wall 28a, and the stem 25 is fitted into the pair of spring plates 32. It has an engaging recess 32a that can be held together and a guide part 32b that spreads toward the end to guide the stem 25 to the recess 32a, and the footboard 24 can be rotated about the pivot 29 and lifted from the inverted position to the upright position. At this time, the engaging member 26 is fitted into the stem 25 from the guide portion 32b, and is fitted and held in the recessed portion 32a, thereby preventing further fitting and easy detachment.

With this configuration, the seat 19F is attached to the mounting portion 18F.
When installing the pedal device A, the footboard 24 is placed in an inverted position against the engaging force of the engaging member 26, and the upper end of the footboard 24 is lower than the upper end of the stem 25 to lower the height of the pedal device A. Seat 19F has 24 treads
It can be installed normally and easily.

Incidentally, the clutch pedal 16R is also constructed in the same manner as the pedal device A described above.

FIG. 6 shows a second embodiment of the present invention, which differs from the first embodiment only in an engaging member 26', in which a U-shaped spring plate 32' is welded to a flat plate 31. The U-shaped bent portion of the spring plate 32' serves as an engaging recess 32a, and both ends become widening guide portions 32b, which is easier to manufacture than the engaging member 26 of the first embodiment. Moreover, overfitting with the stem 25 is completely prevented.

FIG. 7 shows a third embodiment, in which the engaging member 2
6″ is formed by a substantially M-shaped spring plate when viewed from the side, which is approximately the same width as the internal width of the U-shaped mounting portion 28, and only the fixed portion 36 screwed to the bottom surface of the footboard 24 has the full width, and the guide portion at the tip 33 and the engagement recess 3 in the middle part
4 is divided into left and right parts, and has a bifurcated shape when viewed from the front. On the other hand, a round bar 35 is welded to the upper end of the stem 25, and this round bar 35 has approximately the same width as the internal width of the mounting portion 28, and the engaging member 26'' is attached to the portion that protrudes from the stem 25 to the left and right. The engagement recesses are engaged.

Although this third embodiment requires a round bar 35,
The engaging member 26'' can be manufactured very cheaply and easily, and the raised position of the footboard 24 can be maintained more reliably.

FIG. 8 shows an engine stop operation mechanism particularly useful for the forward/reverse conversion type tractor 1.
8 is a stop lever shaft, 39 is a stop lever attached to the stop lever, and 40 is a bracket fixed to the fuel injection pump. Conventionally, a rod is connected to the stop lever 39, and the stop lever 39 is connected to the stop lever 39 near the forward movement handle attachment part 20F or near the rear bonnet 7. Here, the stop lever 39 is rotated by a Bowden wire 41, and one end of the Bowden wire 41 is attached to a handle post 42.

Reference numeral 43 denotes a fitting that is fixed to the handle post 42 via a bolt 44, and one of the halves has a bracket 45, to which the outer wire 41a of the Bowden wire 41 is attached, and to the inner wire 41b. A knob 46 is provided. At the other end of the Bowden wire 41, an outer wire 41a is attached to the bracket 40, and an inner wire 41b is connected to the stop lever 39. 47 is a wire guide fixed to the transmission case 5.

Since this engine stop operation mechanism is a wire type, it can be installed in a narrow place and is simple and easy to install.Since it is attached to the handle post 42, it is easy to operate. Since it can be used as is even if the position is changed to the backward movement mounting part 20R, there is no need to provide a separate set for the backward movement position or to change the mounting position of the one for the forward movement position.

Further, the engine stop operation mechanism can be applied to a tractor that is operated only in a forward posture,
Even in that case, there are advantages such as ease of installation and ease of operation.

According to the present invention described in detail above, a mounting portion 28 is provided on the lower surface of the treadle 24 to be pivotally supported by the stem 25, and a groove 28b is formed in the mounting portion 28 into which the stem 25 can freely enter when the treadle is in an inverted position. With the simple structure of just providing an engaging member 26 that removably engages with the treadle 25, the treadle 24 can be raised and lowered with respect to the stem 25, and can be positioned lower than the upper end of the stem 25 in the tilted position. The pedal device A can be placed without interfering with the seat 19, and since there are only a small number of parts and no parts to be attached or detached, it can be manufactured at low cost and the work of raising and lowering it can be done very easily.

[Brief explanation of the drawing]

Figures 1 and 2 show a forward-reverse convertible tractor to which the present invention is applied. Figure 5 shows the first embodiment of the present invention, and the third embodiment
The figure is a front view, Figure 4 is a cross-sectional view taken along the - line in Figure 3,
Figure 5 is a sectional view taken along the - line in Figure 4, and Figure 6 is a cross-sectional view of Figure 2.
FIG. 7 is a cross-sectional view showing the third embodiment, FIG. 8 is an explanatory diagram showing an example of an engine stop operating mechanism. DESCRIPTION OF SYMBOLS 1...Forward/forward convertible tractor, 16...Clutch pedal, 17...Brake pedal, 18...Mounting portion, 19...Seat, 24...Treadboard, 25...Stem, 26...Engagement member, 28 ...Mounting part, 29
... Pivot, 32 ... Spring plate, A ... Pedal device.

Claims (1)

[Scope of utility model registration request] In a forward/reverse converting tractor equipped with a reverse pedal device A having a stem 25 and a treadle 24 at its upper end in the vicinity of the forward seat attachment portion 18F, the treadle The mounting portion 28 formed on the lower surface of the stem 24 is attached to the stem 25.
A groove 28b is formed in the mounting portion 28 through which the stem 25 can freely enter, and a groove 28b is formed in the mounting portion 28 so that the tread plate 24 is in a position lower than the upper end of the stem 25 when the footboard 24 is in an inverted position. Freely engage the tread plate 2
1. A pedal device for a forward/reverse convertible tractor, characterized in that an engaging member 26 is provided on a footboard 24 to hold the pedal in a raised position.