JPS62141351A - Belt drive transmission - Google Patents

Abstract

PURPOSE:To make it possible to select a speed range without stopping a combine, by interlocking a speed change lever and a select lever by an interlocking mechanism. CONSTITUTION:A combine 8 is provided with a travelling device 10 having a crawler and a gear case 9 including a transmission mechanism. When a speed change lever 5 of an interlocking mechanism 7 is rotated to one end so as to travel the combine at high speeds, a select lever 6 is simultaneously rotated in the same direction with the speed change lever 5, and is fixed at a predetermined position. Owing to this operation, a speed change cam 4 axially expanding and contracting a space between split pulleys 1 and 2 is rotated to contract the space, thereby travelling the combine at high speeds. When the combine is intended to be traveled at low speeds, the speed change lever 5 of the interlocking mechanism 7 is rotated in the reverse direction.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a belt transmission transmission device, and can be used as a transmission device for combines, harvesters, etc.

Conventional technology Conventionally, the traveling device of a combine harvester has a gear case with a built-in transmission mechanism that rotationally drives the left and right crawlers, and is also switched to a fast traveling speed for traveling on the road or a slow traveling speed for working in the field. This device is equipped with an auxiliary transmission gear case with a built-in transmission mechanism that can change the speed, and switches the gears in the auxiliary transmission gear case to a high speed for driving on the road or a low speed for driving in the field. Ta.

Problems to be Solved by the Invention When a combine harvester is run on the road, the gear in the auxiliary transmission gear case is switched to the side that runs at a faster running speed when running on the road, and the combine harvester is run at a faster running speed. When working in the field, the gear in the auxiliary transmission gear case is switched to the side that runs at a slow speed for work, and the combine is run at a slow speed for work. To reduce costs by making a device capable of changing the speed without using the auxiliary transmission gear case, and at the same time, to create a configuration that allows the speed to be changed without temporarily stopping the combine harvester at the time of the change. It is.

Means for Solving the Problems This invention provides split pulleys (1) and (2).
a variable speed cam (4) that expands and contracts 2) in the axial direction of the shaft (3);
Between the speed change lever (5) that rotates the speed change cam (4) in the direction around the shaft (3), there is a lever (6) that changes the rotation range of the speed change cam (4) and changes the speed range. A belt transmission transmission device is provided with an interlocking mechanism (7) that can be switched by.

Effect of the Invention For example, when the combine harvester is run at a high speed on the road, when the gear shift lever (5) of the interlocking mechanism (7) is rotated to one end, the switching lever (6) of the interlocking mechanism (7) is rotated.
is simultaneously rotated in the same direction as the gear shift lever (5) and fixed at a predetermined position, this operation causes the split pulley (1
), the variable speed cam (4) that expands and contracts this split pulley (2) in (2) in the direction of the shaft (3) rotates to a predetermined position, and the split pulley (2) moves toward the split pulley (1) side. As the split pulleys (1) and (2) move to The rotation of 2) speeds up the rotation of the crawlers provided on both the left and right sides of the rotary drive combine, and the combine runs at a high speed. In addition, when the combine harvester is run at a slow speed for working in the field, when the speed change lever (5) of the interlocking mechanism (7) is rotated to the original position opposite to the above, the interlocking mechanism ( The switching lever (6) of 7) simultaneously rotates in the same direction as the speed change lever (5) and returns to its original position, and this operation causes the split pulleys (1) and (2) to switch to the original position. The speed change cam (4), which expands and contracts in the direction of the shaft (3), rotates to its original position, and the split pulley (2) moves to the opposite side of the split pulley (1). The gap between the split pulleys (1) and (2) becomes wider, the diameter of the diameter of the split pulleys (1) and (2) becomes smaller, and the rotation of the split pulleys (1) and (2) causes rotation. The rotation of the crawlers on both the left and right sides of the driven combine becomes slow, and the combine runs at a slow speed.

Effects of the Invention According to this invention, by rotating the gear shift lever (5) of the interlocking mechanism (7), the switching lever (6) of the interlocking mechanism (7) can be moved simultaneously in the same direction as the gear shift lever (5). Due to this operation, the speed change cam (4) rotates and the gap between the split pulleys (1) and (2) is expanded or contracted, and the pulley diameter of the split pulleys (1) and (2) is changed. By increasing or decreasing the diameter, the rotation of the crawlers provided on both the left and right sides of the combine, which is rotationally driven by the rotation of the split pulleys (1) and (2), can be changed to low or high speed. This transmission device is a low-cost transmission device, and it is easy to operate the combine because there is no need to temporarily stop the combine when changing the running speed of the combine from high speed to low speed or from low speed to high speed. become.

Embodiment In the example shown in Figure 1, the combine harvester (8) is a traveling device (10) having a crawler and a gear case (9) containing a built-in transmission mechanism for rotationally driving the crawler in its lower part.
A threshing device (11
), a prime mover (12) and a driver's seat (13) are provided, a pulley (14) is fixed to the shaft end of the prime mover (12), a shaft (3) is provided on the upper part of the gear case (9), and this Axis (3
), a pulley (15) is fixed to the pulley (15), and split pulleys (1) and (2) are provided inside this pulley (15).
1) is fixed to the shaft (3), and this split pulley (2) is configured to slide in the axial direction of the shaft (3).
) A speed change cam (4) is provided inside, and this speed change cam (4)
is configured to rotate in the direction around the shaft (3), and the side surface of this speed change cam (4) has an inclined pawl, and the speed change cam (4) is mounted on the upper part of the gear case (9). A shaft (18) is provided in the center of the gear case (9), and a pulley (17) is attached to this shaft (16). and fix the prime mover (1
2) and the pulley (15) of the shaft (3).
) and pass the belt (18) to the split pulley (1).
, (2) and the pulley (17) of the shaft (1B), a belt (19) is passed between the belt (19), and a rotatable tension device (20) is provided in the middle of the belt (18). , a travel lever (35) that rotates this tension device (20)
A shaft (21) is provided at the bottom of the gear case (9) that protrudes on both left and right sides, and a sprocket (22) is provided at the end of this shaft (21). ) is the configuration in which the crawler is passed,
When the travel lever (35) is operated to the (e) position, the bell (18) and the belt (18) rotate due to the rotation of the prime mover (12), and the shaft (16) is rotationally driven.
The transmission mechanism in the gear case (9) is rotationally driven, the shaft (21) is rotationally driven, and the crawler is rotationally driven, and when the travel lever (35) is operated to the (to) position. This configuration is such that the rotational drive of the crawler is stopped.

There is a box-shaped operation case (23) in front of the driver's seat (engine 3).
is provided, and this operation case (23) is provided with the gear case (
9) is provided with a side clutch lever (24) for manually operating the clutch in the side clutch lever (24).
), the clutch is disengaged, the left or right crawler stops rotating, and the combine (
8) is configured to turn or change the traveling direction to the left or right, and when the side clutch lever (20) is operated to its original position, the clutch is engaged and the crawler rotates, The combine (8) is configured to travel straight.

The operation case (23) is provided with a speed change lever (5) for changing the traveling speed of the combine harvester (8), and an interlocking mechanism (7) is provided below the speed change lever (5). 7) is a shift boss (
25) and the fixed boss (3) fixed to the operation case (23).
A crank-shaped support shaft (28) is rotatably inserted into the support shaft (26), and a switching lever (6) is provided at the end of the support shaft (26), and the lower end of the gear shift lever (5) A connecting rod (27) is provided between the shift lever (5) and the shift cam (4) to connect the shift lever (5) and the shift cam (4). is the switching lever (
6) fix the fixing plate (37) having a long hole into which the
When the shift lever (5) is operated to the (d) position, the switching lever (6) is rotated to the (b) position in conjunction with this operation, and the shift cam (4) is moved by a predetermined amount to the split pulley. (2) side, and this movement causes the split pulley (2) to move toward the pulley (1), and the gap between this split pulley (2) and the split pulley (1) becomes narrower. So, this split pulley (
The diameters of the pulleys 1) and (2) are increased, the rotation of the left and right crawlers becomes faster, and the traveling speed of the combine harvester (8) becomes faster. When operated to the position, the switching lever (6) rotates to the (a) position in conjunction with this operation, and the speed change cam (4) rotates toward the specified accident gear case (9). As a result, the split pulley (2) moves toward the gear case (9), and the gap between the split pulley (2) and the split pulley (1) widens, causing the split pulleys (1) and (2) to move toward the gear case (9). ) is made smaller, the rotation of the left and right crawlers becomes slower, and the traveling speed of the combine (8) becomes slower.

The threshing device (11) is configured to thresh the harvested husk supplied from the husk transfer device (28) while being held and transferred between a check 7 and a clamping plate. is provided with a separation rod (28) for separating the culm to be harvested, and a pulling device (30) for pulling up the separated culm is provided on the rear side of this separation rod (29), and a lower side of this pulling device (30) is provided. A cutting blade (31) for reaping the culm being pulled up is provided at the rear part, and a raking device (32) for raking the reaped culm is provided above the cutting blade (31). ) On the upper side, there is a husk transfer device (
28).

A grain lifting device (33) is installed on the side of the threshing device (11) for frying the threshed grains and discharging them outside the machine, and on the rear side, the threshed culms are cut and sent to the field. This configuration includes a waste culm processing device (34) for discharging.

Incidentally, a concave-convex pawl is formed on the side of the speed change cam (4), and the speed change cam (4) is formed on the upper part of the gear case (9).
) is provided with an uneven claw that engages with the uneven claw of the gear case (9), and the inner peripheral side of the uneven claw of the gear case (9). A link rod is built in between the inner peripheral side of the part, and when the gear shift lever (5) is operated, the connecting rod (2) is interlocked with this operation.
7), the speed change cam (4) rotates, and this speed change cam (4) rotates.
The link rod may be configured to stand up due to the rotational movement of 4) and push the speed change cam (4).

Work on the combine harvester (8) is carried out by an operator sitting in the driver's seat (13), but when driving this combine harvester (8) on the road, the shift lever (5) is moved to position (d). When the travel lever (35) is operated to the (e) position, the pulley diameters of the split pulleys (1) and (2) that rotationally drive the crawler of the combine (8) are changed by the interlocking mechanism (7). and the combine (8)
The vehicle travels at the fastest speed possible on the road. The combine (
8) is run in the field to reap and thresh the culms, the gear shift lever (5) is operated to the (C) position, and the travel lever (35) is operated to the (E) position. ,
The diameters of the split pulleys (1) and (2) that rotationally drive the crawler of the combine (8) are changed by the interlocking mechanism (7), and the combine (8) runs at a slow working speed. Then, while separating the shell culm to be reaped with the separating rod (29), the separated shell culm is held and lifted by the pulling device (30) and transported upwards, while being reaped with the cutting blade (31). The culm is scraped by the raking device (32) and the culm transfer device (2)
8), and this culm transfer device (28) clamps and transports the cut husk culm upwards, and then it is supplied to the threshing device (11), where the chute 7 and the clamping plate While being held and transferred through the threshing device (11), the threshed grains are threshed by the threshing device (11), and the threshed grains are hoisted to the upper part by the hoisting device (33) and discharged outside the machine; Threshed culms are treated with culm processing equipment! In (34), it is cut and discharged to the field.

When switching the combine harvester (8) between a fast speed for traveling on the road and a slow speed for working in the field,
By operating the speed change lever (5), the speed is changed by the interlocking mechanism (7) in conjunction with this operation, making the operation easy and the structure simple.

In addition, to explain another embodiment shown in FIGS. 6, 7, and 8, a chevron-shaped inclined claw is provided on the negative side surface of the speed change cam (4), and the gear case (9) The upper part is provided with an inclined pawl that engages with the chevron-shaped inclined pawl of the speed change cam (4), and operates a switching clutch for switching between forward and reverse in the transmission mechanism in the gear case (9). A switching shaft (39) is provided to protrude from the surface of the gear case (9), and a switching arm (40) is provided at the end of the switching shaft (39).
is fixed, a horizontal loft shaft (41) is provided below the gear shift lever (5), and a connecting loft (38) is provided between the loft shaft (41) and the switching arm (40). ,
A crank-shaped groove is provided in the operation case (23),
When the speed change lever (5) is operated from the neutral position (G) to the (H) position, the combine harvester (8) is configured to move forward, and at the same time, in conjunction with this operation, the switch lever (6)
) rotates to the (l) position, and the split pulleys (1) and (
2), the forward speed of this combine (8) is changed, and the speed change lever (5) is
By approaching the position, the forward speed of the combine (8) is increased.

When the gear shift lever (5) is operated from the neutral position (G) to the (S) position, the combine harvester (8) is configured to move backward, and at the same time, in conjunction with this operation, the switching lever (
6) rotates to the (wo) position, and the split pulley (1),
(2) changes the reverse speed of this combine (8), and by operating the speed change lever (5) close to the (a) position, the combine (8)
The reverse speed of the gear lever (5) is increased.
By operating the combine harvester (8) close to the neutral (g) position, the forward and backward movement speed of the combine (8) is reduced.

When the combine harvester (8) is run at a fast forward speed, the gear shift lever (5) is operated close to the (h) position to run the combine harvester (8) at a fast speed, and when the combine harvester (8) is run at a slow forward speed, the Operate the gear shift lever (5) close to the groove (G) position to drive at a slow running speed. When the combine harvester (8) is to run at a fast reverse speed, the gear shift lever (5) is operated close to the (S) position to run at a fast reverse speed, or at a slow reverse speed. Sometimes, the speed change lever (5) is operated close to the (G) position of the groove to drive the vehicle at a slow reverse traveling speed.

[Brief explanation of drawings]

The drawings show a specific embodiment of the present invention, in which Fig. 1 is a perspective view of a part thereof, Fig. 2 is a side view, Fig. 3 is a front view, and Fig. 4 is a front view.
The figure is a plan view of a part of the combine harvester, and FIG. 5 is a side view of the entire combine harvester. 6, 7, and 8 are views showing other embodiments, in which FIG. 6 is a side view, FIG. 7 is a front view, and FIG. 8 is a partial plan view thereof. In the figure, symbols (1) and (2) are split pulleys, (3) is a shaft, (
4) is a speed change cam, (5) is a speed change lever, (6) is a switching lever, and (7) is an interlocking mechanism.

Claims (1)

[Claims] This split pulley (2) of split pulleys (1) and (2) is connected to the shaft (3
) between the speed change cam (4) that expands and contracts in the axial direction and the speed change lever (5) that rotates this speed change cam (4) in the direction around the shaft (3). A belt transmission transmission device that is provided with an interlocking mechanism (7) that can change the rotation range and change the speed range using a switching lever (6).