JP2841634B2 - Travel transmission - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a traveling transmission device for an agricultural machine or a construction machine, which is provided with traveling devices on the left and right and propelled.

Conventional technology Conventionally, as disclosed in JP-A-1-101273,
There was a steering device for tracked vehicles.

This conventional structure does not use a single drive shaft having a side clutch mechanism and a multiple disc clutch mechanism, but drives the case body of the multiple disc clutch mechanism from another transmission shaft in the transmission case to drive the traveling. The shaft is forward or reverse, and the drive shaft of another system that rotates the main body of the multiple disc clutch mechanism forward or reverse is selected in a free rotation state and a non-rotatable state in advance. Without it, it had a structure that would not allow rapid turning and one-brake slow turning.

Problems to be Solved by the Invention In the related art, there is a drawback that a special reverse transmission mechanism must be configured in a transmission case without effectively utilizing a drive shaft driven at an angle.

Means for Solving the Problems In order to solve the above problems, the present invention provides a single drive shaft 31 with a side clutch mechanism B for separately transmitting power to the pair of left and right traveling devices 1a, 1b. A clutch mechanism C capable of disconnecting power with a variable torque on the same drive shaft 31 is provided separately from the side clutch mechanism B on at least one outer side of the left and right side clutch mechanisms B. After the side clutch is disengaged, the side clutch mechanism B and the side clutch mechanism C are interlocked so that the clutch mechanism C on the side is engaged, and the main body 33 of the clutch mechanism C is attached to the drive shaft 31. Reversing mechanism A that can appropriately reverse the rotation of
And a brake mechanism D for applying a brake to a part of the reverse rotation mechanism A and stopping its rotation, and the reverse transmission mechanism A and the brake mechanism D are provided so as to be selectively operated.

According to the present invention, a single drive shaft 31 equipped with a side clutch mechanism B and a clutch mechanism C in a variable torque transmission mode is provided.
Is driven by the main body side, which is the case side of the clutch mechanism C, via the reversing mechanism 41 to reversely transmit the traveling drive shaft via the clutch mechanism C, and the reversing mechanism A is connected to a brake mechanism. D can be operated in D, so the structure is simpler than that of a conventional device that incorporates a reversing mechanism in the transmission case, and a transmission device without a conventional reversing device can be easily modified. it can.

Embodiment The traveling part of the combine shown in FIG. 1 has a traveling device 3 in which left and right traveling endless bodies 1a and 1b as a pair of left and right traveling devices are vertically movable with respect to a vehicle body 2 in a left and right independent suspension state. ing. More specifically, output shaft cases 4a and 4b are projected to the left and right sides of the transmission case 4 located at the front position at the intermediate portion of the left and right traveling endless bodies 1a and 1b, and the output shaft cases 4a and 4b On the side, a swing transmission case 5 that can rotate around the output shaft protruding from this output shaft case 5
a, 5b, and the drive shafts 6a,
6b, drive sprockets 7a, 7b are attached thereto, and the front sides of the traveling endless bodies 1a, 1b are wound. In addition, swing arms 8a, 8b are provided on the vehicle body 2 provided integrally with the transmission case 4 at the rear portions of the traveling endless bodies 1a, 1b, and idler sprockets 9a, 9b are provided therethrough via idlers. Wrapped around. Further, the swing transmission case 5a and the swing arm 8a, and the swing transmission case 5b and the swing arm 8b are configured to be interlocked by the wheel supporting frames 10a and 10b and swing simultaneously.

The lever 11 integrated with the swing transmission case 5a
a is connected to a piston of a hydraulic device 12a having a base portion attached to the vehicle body 2 side, and a lever 11b having a base portion attached to the vehicle body 2 is connected to a lever 11b integrated with the swing transmission case 5b.
The left and right traveling endless body sides are connected to the piston 2b and independently driven up and down to swing freely, so that the left and right inclination of the vehicle body 2 or the road surface height of the vehicle body 2 can be freely selected.

13 is a threshing device, which is usually used for threshing in a handling room while processing grain culms conveyed by reaping to separate kernels and straws so that the kernels can be harvested. belongs to. In the figure, 14 is a spiral cylinder, 15 is a sorting room,
16 shows a sorting net.

Numeral 17 is a harvesting and conveying device, and a rear end side of a conveying path frame 19 having a conveying device 18 connected to a supply port of the threshing device 13 is pivotally attached to a front end of the threshing device 13 with a lateral support shaft, A cut culm receiving trough 21 provided with a transfer spiral 20 for receiving the harvested grain culm at the tip side and scraping to the left and right central sides is provided, and further, a clipper cutting blade 22 is provided in front of the trough. 23 indicates a weeding rod, and 24 indicates a raising reel. And the transport path frame 19 of this reaper transport device 17
A hydraulic device 25 is interposed between the frame 19 and the vehicle body 2 so that the hydraulic device 25 can rotate vertically with respect to the vehicle body 2.

The transmission in the transmission case 4 will be described in detail. Power from an engine is transmitted to the input shaft 26 via a hydraulic transmission mechanism E (commonly called HST). The input shaft 26 is provided with a transmission clutch gear 27 which is slidable in the axial direction and is rotated integrally with the shaft. The clutch gear 27 includes a large-diameter gear 27a, a medium-diameter gear 27b, and a small-diameter gear 27c, and can be moved on a shaft by a shifter 28.

Reference numeral 29 denotes an intermediate shaft, which is provided on the left and right sides of a gear 29a integral with the shaft, for shifting gears 30a, 3 meshing with the gears 27a, 27b, 27c, respectively.
0b and 30c are installed.

Reference numeral 31 denotes a drive shaft for a clutch support shaft. Both left and right ends are rotatably supported by penetrating through the case bodies 33a and 33b of the multi-plate clutch mechanism 32a and 32b. The clutch case bodies 33a and 33b It is rotatably supported by transmission cases 34a, 34b inside the reversing mechanism that can be attached to and detached from both sides. Three
Reference numeral 5 denotes a drive gear fixed to the drive shaft 31 and the gear 29a.
And the drive shaft 31 is rotated at a reduced speed.

Drive clutch gears 35a and 35b are integrally provided on both left and right sides of the drive gear 35.

36a, 36b are side clutch gears and gears having both functions of reduction, which are loosely fitted to the drive shaft 31 so as to be freely rotatable,
The gear 36a is provided so as to be freely disengageable from the gear 35a, and the gear 36b is provided so as to be freely disengageable from the gear 35b, and constitutes a side clutch mechanism B. And these gears 36a, 36
Small-diameter gears 37a and 37b for reduction are integrally attached to a boss portion integral with b, and a plurality of clutch disks 38 that are integrally rotated with the boss portion are attached to the outside thereof. . On the other hand, a clutch disc that rotates integrally with the case
39 is provided between the clutch discs 38, 38, and the side clutch shifters 40a, 40b move the boss with the gears 36a, 37a or the boss with the gears 36b, 37b to shift the gear 35a.
Alternatively, when the power transmission from the gear 35b is cut off, the clutch disc 38 and the clutch disc 39 are pressed against each other. That is, the clutch mechanism C is a variable torque transmission type clutch such as a multiple disc clutch or a cone clutch of the embodiment.

The reverse rotation mechanism A and the brake mechanism D in the transmission cases 34a and 34b will be described. Gears 41a and 41b for reverse transmission are fixed to the clutch case bodies 33a and 33b. On the outer side of the gear 41a or the gear 41b, there is provided a rotating body 42 which is spline-fitted to the drive shaft 31 and rotates integrally with the shaft 31.The rotating body 42 is provided with a clutch pawl 42a. .
Further, a rotatable gear 44 is provided on the drive shaft 31 via a bush 43 so as to be movable in the axial direction on the outer side of the rotating body 42, and a clutch pawl that can be engaged with the clutch pawl 42a on this gear 44 is provided. 44a is provided on the inner surface, and a spring 45 is interposed between the rotating body 42 and the gear 44 so that the gear 44
Are urged outward so that the clutch claws 42a and 44a do not engage, and the transmission case 34a,
A claw 44b is provided to engage with a brake claw 46 formed on the inner surface of 34b. A counter shaft 47 is provided with a counter gear 48 that meshes with the gear 44, and a gear 49 that meshes with the gear 48.
Is provided on another counter shaft 50, and a gear 49a provided integrally with the gear 49 is engaged with the gear 41a or the gear 41b so that the rotation direction of the drive shaft 31 and the rotation direction of the clutch case main bodies 33a, 33b are reversed. It is configured to be able to.

As described above, the brake mechanism D includes the claw 44a of the gear 44.
When the clutch engages with the brake pawl 46, the rotation of the gear 44 is stopped so that the rotation of the gear 41a or the gear 41b is stopped, and the clutch mechanism C is directly transformed into a brake mechanism. 51a and 51b are shifters for moving the gear 44 in the axial direction, and are linked to the left and right petals 52a and 52b via wires.

53 is an intermediate shaft for deceleration transmission, which includes the gears 37a and 37
Large-diameter gears 54a and 54b that mesh with b are loosely fitted, respectively, and small-diameter gears 55a and 55b that are integral with the gears 54a and 54b are attached to the bosses of these gears 54a and 54b.

Reference numerals 56a and 56b denote output shafts, respectively. Gears 57a and 57b meshing with the gears 55a and 55b are integrally attached, and the cylindrical output shaft case 4 protrudes to the left and right sides of the transmission case 4.
Pins 58 are rotatably supported in a and 4b, and are rotatably inserted at the left and right inner ends through holes provided in the shaft cores of the output shafts. Then, as described above, the output shaft case 4
Swing transmission cases 5a, 5b are pivotally mounted on a, 4b.

The shifters 40a and 40b include a steering lever 59a of the cockpit 60,
Wired to 59b.

According to the configuration of the above example, in the field where the mowing and threshing operation is being performed, when the mowing / transporting device 17 is moved up and then turns quickly, the brake petal 52 on the side to be turned is depressed to resist the spring 45. The gear 44 is moved inward to disengage the brake pawl 46 and the pawl 44b, and the pawl 44a is engaged with the clutch pawl 42a of the rotating body 42, and the gear 44 is rotated from the drive shaft 31. deep. In this state, when the steering lever 59 on the side to be turned is depressed, the clutch gear of the side clutch
After disengagement between the clutch gear 35a and the clutch gear 36a or between the clutch gear 35b and the clutch gear 36b,
8 and the clutch board 39 are pressed against each other. Therefore, power is transmitted from the gear 44, which is integrally rotated from the drive shaft 31 via the rotating body 42, to the reverse rotation transmission gear 41a or 41b via the counter gear 48, the gear 49, and the gear 49a. The case main body 33a or the case main body 33b of the clutch mechanism 32a or the multiple disc clutch mechanism 32b is rotated to the side opposite to the drive shaft 31. For this reason, the gear 3 is connected from the case body 33a or the case body 33b through the multi-plate clutch mechanism.
The gear 7a or the gear 37b is reversely rotated in the opposite direction to the normal case, and the gear 54a or the gear 54b is transmitted in the reverse direction, and the traveling endless belt 1a or 1b on the side to be turned is reversely rotated to perform rapid turning.

Next, when turning slowly, the step on the petal 52 is released, and the gear 44 is operated outward by the spring 45 to engage the pawl 44a with the brake pawl 46 to stop the rotation of the gear 44.

In this state, when the steering lever 59 on the side to be turned is depressed as described above, the clutch gear 35 of the side clutch is depressed.
a is disengaged from the clutch gear 36a or between the clutch gear 35b and the clutch gear 36b.
And the clutch board 39 are pressed against each other. At this time, the gears 41a and 41b provided integrally with the case body 33a or the case body 33b of the multi-plate clutch mechanism 32a or the multi-plate clutch mechanism 32b are engaged with the gear 49a which has become unrotatable this time. As a result, the clutch disc 39 becomes a brake due to the pressure contact and the rotation of the gear 37a or the gear 37b is stopped, so that it is possible to make a slow turn in a state where the transmission to one of the traveling endless belts 1a or 1b is interrupted.

In the case of rapid turning, agricultural machines and construction machines may cause danger or disrupt work. For example, a case where the vehicle is traveling at high speed on a road, a case where a harvesting operation is being performed by a combine, or the like.

At these times, it is required that rapid turning does not occur automatically. Therefore, in the embodiment, the pin 60 for preventing the pedals 52a and 52b from being depressed is configured to be operated by the solenoid 61, and this solenoid 61
Excitation, such as the sensor switch SW ₂ for detecting that the sensor switch SW _3, or, in the case of combine a working reaper descends a sensor switch SW ₁ or reaper 17 out cereal稈検detects this at the time of switching speed It is good to have a configuration operated by a sensor.

In the embodiment, the switches SW ₁ , SW ₂ , and SW ₃ are connected in parallel. However, they may be provided in series so that the safe turning can be performed only when the front part is detected. Of course, the sensor may be replaced by any one of the sensors or another sensor provided in a portion for operation or operation which is deemed necessary.

In the figure, reference numeral 62 denotes a battery, and 63 denotes a sensor actuator.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows an embodiment of the present invention. FIG. 1 is a side view of an agricultural combine equipped with the present invention, FIG. 3 is a transmission development view in cross section of a main part, FIG. 4 is a transmission view including a steering operation part, FIG. 5 is a side view of a main part of an operation system, and FIGS. 6 to 8 are switches for a safety mechanism. FIG. 9 is a simplified diagram showing the mounting portion, and FIG. 9 is an electrical diagram of the safety control mechanism. Symbols 1a and 1b in the figure are a traveling device, 31 is a drive shaft, 33 is a clutch main body (case main body), A is a reverse rotation mechanism, B is a side clutch mechanism, C is a clutch mechanism, and D is a brake mechanism.

Claims (1)

(57) [Claims] 1. A single drive shaft 31 is provided with a side clutch mechanism B for separately transmitting power to a pair of left and right traveling devices 1a, 1b. Aside from the side clutch mechanism B, a clutch mechanism C capable of disconnecting power with a variable torque on the same drive shaft 31 is provided, and after the side clutch is disengaged by the disengagement operation of the side clutch mechanism B, the clutch mechanism C on that side is disengaged. The side clutch mechanism B and the side clutch mechanism C are interlocked so as to be engaged, and the drive shaft 31 is provided with a reversing mechanism A capable of appropriately reversing the rotation of the body 33 of the clutch mechanism C. A traveling transmission device comprising a brake mechanism D for applying a brake to a part of A and stopping its rotation, and a reverse rotation mechanism A and a brake mechanism D are provided so as to be selectively operated. Place.