JPS6037628Y2 - Power transmission device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a power transmission device for agricultural machinery including all-terrain vehicles, various work vehicles, and the like.

Conventionally, traveling agricultural machinery generally uses a manual lever linked to a belt tension pulley to switch the vehicle's running speed and the rotation speed of the work equipment, but passenger vehicles are equipped with a transmission with a built-in auxiliary transmission. In many cases, the equipment was large and expensive.

In addition, there are few belt tension systems, and even if there are, the single-disconnection I-contact operation of the power transmission device is performed only with a manual lever, just like in the walking type, and there is a difference in operation feel compared to automobiles equipped with foot pedals. There was a misalignment, making it difficult to operate.

This invention is equipped with multiple pairs of pulleys of different sizes between the prime mover and the vehicle travel transmission section or the work equipment transmission section, and a belt and tension pulley are provided between each pair of pulleys. A single manual lever that selects and operates each of the tension pulleys and is interlocked with the operating system of the same manual lever, in the case where the transmission of power to the vehicle travel transmission section or the work equipment transmission section is disconnected or connected to shift gears and operate the clutch. The invention is characterized in that it is equipped with a single foot pedal which, when operated, cuts off the power transmission to all the belts.The purpose of this pedal is to eliminate the drawbacks of the conventional technology and to provide an economical and easy-to-operate power source. It is intended to provide a transmission device.

The present invention is constructed as described above, and when a manual lever is operating one of the tension pulleys and another tension pulley is to be operated, the manual lever can independently switch the tension pulley. Furthermore, it is also possible to operate the other tension pulleys by operating the foot pedal to cut off the power, and then operating the rear foot pedal by switching the manual lever.

As described above, according to the present invention, the belt tension type power transmission device is used, so the cost is very low.

Furthermore, no matter which tension pulley is operated by the manual lever, the power can be turned off or on by operating the foot pedal, so the vehicle can be driven in the same way as a general automobile, and is therefore easy to operate.

The present invention will now be described in detail with reference to the most preferred embodiment shown in FIGS. 1-3.

In the figure, 1 is the chassis, 2 is the wheel, 3 is the frame,
4 is a loading platform, 5 is a panel, 6 is an engine cover, 4 is a driver's seat, 8 is a prime mover, 9 is a transmission, 10, 11
12 is a V-belt, 12 is a pulley on the motor side, 13 is a pulley on the transmission side, 14 is a brake pedal, 15 is a foot pedal, and 16 is a manual lever.

Manual lever 16 and fork 17.18 are connected to shaft 19
The guide plate 20 is rotatably supported by a guide plate 20 fixed to the panel 5, which is indicated by a two-dot chain line in FIG.

The upper ends of the U-arms 21 and 21' are rotatably supported by the forks 17 and 18, respectively.
’ at the lower end of each tension spring 22.2.
It is multiplied by 3.

The foot pedal 15 and arms 24, 25 are rotatably supported by a shaft portion 26' of a bracket 26 fixed to the frame 3, and the other end of a tension spring 22, 23 and a port are attached to the ends of the arms 24, 25. One end of the cable is attached.

Shaft 2 fixed to chassis 1 or frame 3
Tension pulley 30.30 rotatably supported by 9
The other end of the Bowden cord 27.28 is attached to a tension arm 31.32 having a .

Further, V-belts 10 and 11 are loosely hung between pulleys 12 and 13.

The present embodiment is constructed as described above, and its operation will be explained next.

Power is transmitted from the prime mover to the belt to the transmission to the wheels by operating the tension pulley 30 on the V-belt 10 or 11 that is hung between the boo IJ 12 on the prime mover side and the pulley 13 on the transmission side.

Now, in the state shown in Figure 3, the V-belts 10 and 11 are connected to the pulley 12.
It loosens between ゜13 and does not transmit due to re-slip, but
When the manual lever 16 is rotated in the direction of arrow A along the U-shaped guide hole of the guide plate 20, the manual lever 16
is in a state beyond one point and comes to rest at the front end of the guide hole of the guide plate 20 as shown in the figure.

Since the manual lever 16 is restrained by a fork 18 which also has a U-shaped notch, the manual lever 16 rotates the fork 18 at the same time, and the upper end of the manual lever 16 is rotatably supported by the fork 18. Pull up arm 21'.

Therefore, the Bowden cable 28 is displaced via the tension spring 23 and arm 25 hung on the lower end of the U-arm 21', and the tension pulley 30 is moved around the shaft 29 or the tension arm 22 attached to the end of the Bowden cable 28. It rotates to the arrow point B as shown by the two-dot chain line, and applies tension to the V-belt 11 corresponding to the extension of the tension spring 23 to tension the V-belt 11 and enable transmission.

Next, after returning the manual lever to the position shown by the solid line in Fig. 3, move the manual lever 16 along the guide hole of the guide plate 20 to the arrow point C, and then rotate it in the arrow direction A to obtain the same effect as described above. to tension the other V-belt 10.

On the other hand, a bar 15' is fixed to the clutch pedal 15, and when the manual lever 16 is rotated in the direction of arrow A, the U arm 21
, is pushed up by the upper surface of the arm 25 to the position indicated by the arrow in conjunction with the tension spring 23.

Also, when the V-belt 10 is under tension, it is pushed up by the arm 24.

Therefore, which arm 24.25 among arms 24.25
Even if the V-belt 10 or 11 is pushed up, by pressing the foot pedal 15 from the D position, it is possible to release the tension in the V-belt 10 or 11 and cut off the power transmission.

When switching the tension pulleys 30, 30', the manual lever 16 alone can be used to switch the tension pulleys 30 and 30', as described above, but the manual lever must also be pressed by pressing the foot pedal 15 to release tension from all V-belts. You may switch by operating 16.

After switching the manual lever 16, when the foot pedal is released, the manual lever 1 is switched by the action of the tension springs 22 and 23.
The tension pulley defined by 6 tensions the V-belt, and by gradually releasing the pressure from the foot pedal, it is possible to prevent the vehicle from suddenly starting.

As described above, according to this embodiment, an inexpensive belt tension type power transmission device can be used by operating the foot pedal, and the vehicle can be driven in a manner similar to that of a general automobile, making the vehicle extremely easy to operate.

Next, a second embodiment shown in FIG. 4 will be described.

In this embodiment, the arms 24 and 25 of the first embodiment are removed and wires 41 and 42 are added.

That is, one ends of Bowden cables 27, 28 and wires 41.degree. 42 are hung on the lower ends of the tension springs 22, 23, and the other ends of the wires 41, 42 are attached to the bar 15' of the foot pedal 15.

When the manual lever 16 is rotated in the A direction, the fork 18, U
Bowden cable 28 is displaced via arm 21' and tension spring 23, actuating tension pulley 30'.

At this time, since the tension spring 23 and the foot pedal 15 are connected by the wire 42, the foot pedal 15 is also pulled up to the position indicated by the arrow.

On the other hand, since the fork 17 is stationary, the U-arm 21, tension spring 22, and wire 41 connected to the bar 15' are free, and therefore no tension is applied to the Bowden cable 27.

When the foot pedal 15 is depressed from the D position, the manual lever 16 is activated.
Even if the belt remains in the A position (clutch engaged), the tension on the Bowden cable is released, and the belt 11 is loosened, cutting off power transmission.

Further, when the manual lever 16 is moved from the arrow point C to the arrow point A, tension is similarly applied to the Bowden cable 27.

This embodiment has the same effects as the first embodiment.

[Brief explanation of the drawing]

1 to 3 show a power transmission device according to a first embodiment of the present invention, and FIG. 1 is a side view of a vehicle equipped with this embodiment;
FIG. 2 is a front view showing the vehicle with some of the accessories removed, FIG. 3 is a perspective view showing the main parts of this embodiment, and FIG. 4 is a front view of the vehicle with some of the accessories removed. FIG. 3 is a perspective view showing the same portion as FIG. 3; 8...JJX motive, 9------) Lance mission, 10.11...■Belt, 12,1
3... Pulley, 15... Foot pedal,
16...Manual lever 30.30'...
・Tension pulley.

Claims (1)

[Scope of utility model registration request] A plurality of pairs of pulleys of different sizes are provided between the prime mover and the vehicle running transmission section or the work equipment transmission section, and a belt and tension pulley are provided between each pair of pulleys, and by operating each tension pulley, the vehicle running transmission is transmitted from the prime mover. A single manual lever for selectively operating each of the tension pulleys, and a single manual lever that is linked to the operating system of the manual lever, in a device that performs speed change and clutch operation by disconnecting and connecting power transmission to the power transmission section or work equipment transmission section, and A power transmission device characterized by comprising a foot pedal which, when operated, cuts off power transmission to all belts.