JPH0711562Y2 - Transmission in binder - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention is directed to continuously variable transmission of power transmitted from an engine through a transmission to a traveling device and a cutting and binding device in a binder by adjusting an output of the engine. The present invention relates to a transmission that can be performed.

[Conventional technology]

Conventionally, in a binder, power is transmitted from an engine to a traveling device and a mowing and binding device through a transmission, and a transmission transmission mechanism and an engine output adjusting mechanism are used to drive the traveling transmission device and the mowing device.
It is designed to change the speed of the binding device.

[Problems to be solved by the device]

By the way, in the case of the conventional binder, the shifting of the traveling device and the mowing and bundling device during the harvesting work must be performed by the combination of the shifting of the transmission and the adjustment of the output of the engine according to the work content and the working situation. Therefore, not only is the gear shifting operation extremely complicated, but it is particularly difficult to appropriately shift the traveling speed and the cutting and binding speed during the work.

In view of such a problem in the conventional binder, the present invention constitutes a continuously variable transmission mechanism between the output shaft of the engine and the input shaft of the transmission, which automatically adjusts the transmission speed in proportion to the rotation speed of the engine. As a result, the power transmitted from the engine to the traveling device and the mowing and bundling device through the transmission can be continuously stepped by only the output adjustment operation of the engine. It is an object of the present invention to provide a speed change device in a binder that can easily and appropriately perform the speed change.

[Means for Solving the Problems]

The present invention is configured as follows as a technical means for achieving the object.

That is, in a transmission device of a binder for transmitting power from an engine to a traveling device, a cutting device, and a binding device through a transmission, a drive-side speed change pulley, in which a pulley diameter is expanded and contracted by sliding a slide pulley, is provided on an output shaft of the engine, A transmission belt for transmitting power is suspended between the drive side speed change pulley and the input side speed change pulley provided on the input shaft of the transmission, and a slide pulley is slid on the drive side speed change pulley in conjunction with the output shaft. A centrifugal weight type automatic slide mechanism is provided, and a continuously variable transmission mechanism that automatically adjusts the transmission speed in proportion to the engine speed is configured.

[Action]

In the transmission of the binder according to the present invention, the centrifugal weight type automatic slide mechanism interlocking with the output shaft of the engine slides the slide pulley of the drive side transmission pulley to expand and contract the diameter of the pulley. The rotation speed of the transmission input shaft is automatically adjusted in proportion to the rotation speed. That is, when the output shaft of the engine rotates at a low speed, the input shaft of the transmission rotates at a low speed, and when the output shaft of the engine rotates at a high speed, the input shaft of the transmission rotates at a high speed. Therefore, only by adjusting the output of the engine, the continuously variable transmission to the traveling device, the cutting device, and the binding device is performed.

Also, when the engine enters a low-speed rotation state due to a temporary increase in load, the transmission input shaft automatically changes to a low-speed rotation state, so the engine is powered by a large torque and the engine stops. There is no.

〔Example〕

 An embodiment of the present invention will be described with reference to the drawings.

In the drawings, a transmission device of a binder is illustrated, 1 is an engine, 2 is a transmission, and
The output shaft 3 and the input shaft 4 of the transmission 2 are interlocked via a continuously variable transmission mechanism 5 having a speed adjusting function for automatically adjusting the transmission speed in proportion to the rotation speed of the engine 1. This continuously variable transmission mechanism 5 includes a drive side transmission pulley 6 of an output shaft 3 of an engine 1 and an input shaft 4 of a transmission 2.
The transmission belt 8 is suspended between the input side speed change pulleys 7 and the drive side speed change pulley 6 is a fixed pulley 10 fixed to a shaft cylinder 9 rotatably supported by the output shaft 3 of the engine 1. And a slide pulley slidably fitted on the barrel 9
The slide pulley 11 consists of 11
There is provided a centrifugal weight type automatic slide mechanism provided with a weight 12 that slides to expand and reduce the pulley diameter of the drive side speed change pulley 6. Reference numeral 13 denotes the weight guide, and a clutch bracket 14 corresponding to the weight guide 13 is fixed to the output shaft 3 of the engine 1 so as to rotate integrally,
The weight guide 13 and the clutch bracket 14 constitute a clutch in which power is transmitted to the drive side speed change pulley 6 when the output shaft 3 has a certain rotational speed or higher, and power transmission is interrupted when the output shaft 3 is lower than the rotational speed. ing. The other input side speed change pulley 7 comprises a fixed pulley 15 fixed to the input shaft 4 of the transmission 2 and a slide pulley 16 slidable with respect to the fixed pulley 15, and the slide pulley 16 is moved in the direction of the fixed pulley 15 by a pressure adjusting spring 17. Has been held.
18 is a spring holder.

In the transmission 2, a forward clutch gear 19 and a reverse clutch gear 20 are rotatably fitted to the input shaft 4, and between the forward clutch gear 19 and the reverse clutch gear 20 are integrated with the input shaft 4. A rotating clutch boss 21 is fitted. Reference numeral 22 is a shifter, and this shifter 22 is slidably fitted on a shifter shaft 23, and the shifter 22 and the clutch boss 21 are interlocked via balls 23. Reference numeral 24 is a forward / reverse switching lever, and the rod 25 of the forward / reverse switching lever 24 and the shifter 22 are connected via a shift lever 26 and a shift rod 27. 28 and 29 are pressing springs. Reference numeral 30 denotes a traveling wheel shaft, which is constantly meshed with the clutch gears 19 and 20, and is interlocked by a transmission mechanism 31 which is selectively interlocked with the input shaft 4 by the clutch boss 21. . Reference numeral 32 is a reaping clutch, and the reaping clutch 32 is interlocked with the input shaft 4 of the transmission 2. 33 is a reaping clutch lever.

For the input side speed change pulley 7 of the continuously variable speed change mechanism 5,
Pressure adjusting spring 17 holding the slide pulley 16
The pressure adjusting shifter 34 for adjusting the pressing force of the pressure adjusting lever 34 is provided.
It is interlocked with. By adjusting the pressing force of the pressure adjusting spring 17 with the pressure adjusting lever 36, the speed change range of the continuously variable transmission mechanism 5 can be adjusted. Then, when the pressure adjusting lever 36 is tilted in a direction to reduce the pressing force of the pressure adjusting spring 17, a high speed state is set,
When the tilting operation is performed in the direction of increasing the pressing force, the speed becomes low.

In FIG. 2, the cutting clutch 32 is connected to the pressure adjusting lever 36 by a rod.
The interlocking configuration is shown by 37. That is, the mowing clutch 32 is engaged at a low speed and the mowing clutch 32 is disengaged at a high speed, and the mowing operation is automatically stopped when traveling at a high speed to simplify the operation and prevent erroneous operation. There is.

In the above-described structure, the rotation speed of the input shaft 4 of the transmission 2 is automatically adjusted in proportion to the rotation speed of the output shaft 3 of the engine 1. That is, when the output shaft 3 of the engine 1 is rotating at a low speed, the centrifugal force acting on the weight 12 by the drive-side speed change pulley 6 of the continuously variable transmission mechanism 5 is small, so that the diameter is small, and conversely, the input-side speed change pulley 7 is The diameter of the pressure adjusting spring 17 becomes large against the pressure adjusting spring 17, and the input shaft 4 of the transmission 2 rotates at a low speed. When the output shaft 3 of the engine 1 rotates at high speed, the centrifugal force acting on the weight 12 becomes large and the diameter of the drive side transmission pulley 6 becomes large, and conversely the diameter of the input side transmission pulley 7 of the input shaft 4 of the transmission 2 becomes large. Is pressed by the pressure adjusting spring 17 and becomes small, and the input shaft 4 of the transmission 2 rotates at high speed. Therefore,
Only by adjusting the output (rotational speed) of the engine 1, the gear shift of the traveling device, the mowing and the binding device is appropriately performed via the transmission 2.

Further, when the engine 1 is in the low speed rotation state due to the temporary increase of the load, as described above, the transmission 2
Since the input shaft 4 is automatically rotated at a low speed, power is supplied from the engine 1 to the transmission 2 with a large torque, and the engine 1 does not stop. For this reason,
The work can be continued as it is when the load returns to normal without any unnecessary interruption of the work.

By adjusting the output of the engine 1, the number of revolutions of the input shaft 4 of the transmission 2 can be continuously changed, so that the traveling speed and the mowing and bundling speed are always synchronized in an appropriate relationship to facilitate the harvesting work. Done.

[Effect of device]

As described above, the present invention is a binder transmission device for transmitting power from an engine to a traveling device, a cutting device, and a binding device through a transmission, in which a pulley diameter is expanded / contracted by sliding a slide pulley on an engine output shaft. Side shift pulley is provided, and a transmission belt for transmitting power is suspended between the drive shift pulley and the input shift pulley provided on the input shaft of the transmission, and the drive shift pulley is interlocked with the output shaft. By installing a centrifugal weight type automatic slide mechanism that slides the slide pulley,
Since the continuously variable transmission mechanism that automatically adjusts the transmission speed in proportion to the engine speed is configured, the centrifugal weight type automatic slide mechanism that interlocks with the output shaft of the engine slides the slide pulley to drive it. Since the diameter of the speed change pulley is expanded / contracted, the power transmitted from the engine to the traveling device, the cutting device, and the binding device via the transmission can be continuously changed only by adjusting the output of the engine. In the above, there is an effect that traveling, cutting, and shifting of binding can be performed easily and appropriately.

[Brief description of drawings]

The drawings show an embodiment of a transmission in a binder according to the present invention. FIG. 1 is a development view showing a main part of the transmission device, and FIG. 2 is a development of a main part showing another embodiment of the same. It is a figure. 1 ... Engine, 2 ... Transmission, 3 ... Output shaft, 4 ... Input shaft, 5 ... Stepless speed change mechanism, 6 ... Drive side speed change pulley, 7 ... Input side speed change pulley, 8 ... Transmission Belt, 10 ... Fixed pulley, 11 ... Slide pulley, 12 ...
… Weight, 13 …… Weight guide, 14 …… Clutch bracket, 15 …… Fixed pulley, 16 …… Slide pulley, 17 ……
Pressure adjusting spring, 18 ... Spring holder, 24 ... Forward / reverse switching lever, 30 ... Traveling wheel shaft, 32 ... Mowing clutch, 33 ... Mowing clutch lever, 36 ... Pressure adjusting lever

Claims (1)

[Scope of utility model registration request] 1. A binder transmission device for transmitting power from an engine to a traveling device, a cutting device, and a binding device via a transmission, wherein a drive-side speed change pulley is provided on an output shaft of the engine, in which a pulley diameter is expanded / contracted by sliding a slide pulley. A transmission belt for transmitting power is suspended between the drive-side speed change pulley and the input-side speed change pulley provided on the input shaft of the transmission, and the drive-side speed change pulley has a slide pulley linked to the output shaft. A transmission in a binder, comprising a centrifugal weight-type automatic slide mechanism for sliding a gear, and a continuously variable transmission mechanism that automatically adjusts a transmission speed in proportion to an engine speed.