JP2002240583A - Power take-off for power agricultural machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power take-off capable of increasing the rigidity of an input/output shaft portion and taking off the rotation of an output shaft proportional to an engine speed. SOLUTION: An input shaft to be rotated by receiving the rotating power of an engine is provided on one side of a transmission case and a change gear is provided in the transmission case for gear-changing the rotating power of the input shaft. The power gear-changed by the change gear is transmitted to a travel axle and the power parted on the way of a travel transmission passage is transmitted to the output shaft provided on the same side as that of the input shaft concentrically therewith.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power take-out device for a power agricultural machine such as a combine.

[0002]

2. Description of the Related Art Conventionally, this type of apparatus has been disclosed in
No. 9869 is known. In this publication, an input shaft for receiving power from an engine is provided on a lateral side of a transmission case so as to protrude therefrom, and a belt type continuously variable transmission and a planetary gear type continuously variable transmission incorporated in the transmission case are provided. The power shifted by the device is transmitted to a traveling axle.

A pulley is mounted on the input shaft for driving a reaping unit, which is a working unit. A belt is wound between the pulley and the input pulley on the reaping device side so as to rotate at a constant speed. The power is transmitted to the reaping side.
Another example of the combine used is described in JP-A-9-74874.

In this publication, a belt type continuously variable transmission and a planetary gear type continuously variable transmission are incorporated in a transmission case to transmit reduced rotational power to a traveling axle by a combination of these transmissions. A power take-off shaft is extended from the transmission upper side of the planetary gear mechanism, and a pulley is attached to an end of the shaft to drive a cutting unit.

[0005]

However, in the former case of the above-mentioned conventional apparatus, although the stepless rotational power can be transmitted to the traveling axle side, the power for driving the working unit is transmitted by the transmission. Because the structure is not continuously variable, for example, in the case of a combine, the harvesting unit is not configured to be linked to the vehicle speed. There was a problem that clogging occurred.

In the latter case, although the working unit is driven in conjunction with the vehicle speed, the power take-off shaft is provided at a position deviated from the input shaft, and a pulley is attached to the shaft end. The position of the pulley on the input side and the pulley on the output side are greatly displaced, which makes it difficult to replace the belt, complicates the structure of the transmission case, and has no empty space on the side of the transmission case. There is a problem that it is difficult to provide an operation member such as a tension clutch and a linking member.

[0007]

SUMMARY OF THE INVENTION The present invention has been proposed in view of the above problems, and has the following configuration. That is, according to the first aspect of the present invention, the input shaft 24 that rotates by receiving the rotational power of the engine 6 is provided on one side of the transmission case 20.
A transmission for shifting the rotational power of the input shaft 24 is provided in the transmission case 20, and the power shifted by the transmission is transmitted to the traveling axles 67 and 67, while being branched in the traveling transmission path. The power is provided on the same side as the input shaft 24 and concentrically, and the output shaft 7 for driving the working unit is provided.
2. A power take-out device for a power agricultural machine, wherein the power take-out device is configured to transmit the power to the power agricultural machine. Further, according to the invention of claim 2, the transmission comprises a belt-type continuously variable transmission 22 and a planetary gear mechanism 21, and a stepless power is provided to the traveling axles 67, 67 and the output shaft 72 for driving the working unit. The power take-out device for a power agricultural machine according to claim 1, wherein the power take-off device is configured to be transmitted.

Further, according to the third aspect of the invention, pulleys 73 and 74 are attached to the input shaft 24 end and the output shaft 72 end, respectively, and the output pulley 74 is located closer to the inside of the machine than the input pulley 73. The power take-out device for a power agricultural machine according to claim 1 or 2, wherein the power supply device is configured to drive a work unit attached to the machine body.

[0009]

The power of the engine 6 is transmitted to the input shaft 24 and is shifted by the transmission in the transmission case 20. The shifted rotational power is transmitted to the traveling axles 67, 6 on the lower transmission side.
7 is transmitted.

At the same time, the rotational power branched from the traveling system is taken out from the output shaft 72 provided on the same side of the transmission case 20 as the input shaft 24, and transmitted to the working unit. Since the input shaft 24 and the output shaft 72 are on the same side, and the shaft cores are concentric, the transmission configuration of the input / output shaft portion is compact.

[0011]

According to the present invention, an input shaft 24 is provided on one side of the transmission case 20 for rotating by receiving the rotational power of the engine 6, and the transmission case 20 is provided with a transmission for changing the rotational power of the input shaft 24. Devices 21 and 22 are provided, and the power shifted by the transmissions 21 and 22 is transmitted to the traveling axles 67 and 6.
7 while transmitting the power branched in the middle of the traveling transmission path to the output shaft 72 for driving the working unit, which is provided on the same side as the input shaft 24 and concentrically. The power take-off device for the power farming machine is characterized by increasing the free space on the side of the transmission case 20 to facilitate the routing of the speed change operation members and interlocking members, and the rigidity due to the double structure of the input and output shafts. Has the characteristic of increasing.

The transmission is composed of a belt-type continuously variable transmission 22 and a planetary gear mechanism 21, and is continuously provided on the traveling axles 67, 67 and the output shaft 72 for driving the working unit. With the configuration in which the power is transmitted, the rotational power linked to the vehicle speed is taken out to the working unit side, and the workability and operability are improved. In particular, if the invention of claim 2 is applied to a combine, the rotation speed of the reaping unit according to the vehicle speed can be obtained,
It is possible to eliminate clogging of the grain stalk during transport, and the harvesting and transporting posture is stabilized, and transporting performance is improved.

In claim 3, pulleys 73 and 74 are attached to the end of the input shaft 24 and the end of the output shaft 72, respectively, and the output pulley 74 is located closer to the inside of the machine than the input pulley 73. Since the attached working unit is configured to be driven, the configuration of the input / output shaft unit is simplified and the belt can be easily replaced.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a side view of a combine 1 in which a threshing unit 4 and a Glen tank (not shown) for temporarily storing threshed grains are horizontally and horizontally located above a traveling body 3 having a traveling crawler 2. It is provided side by side.

A cutting section 7 is provided at a front portion of the traveling vehicle body 3. The culm transporting device 13 and the like support the cutting support metal 14
It is configured to rotate up and down around the rotation fulcrum 14a.

The grain stalks cut by the cutting blade device 10 and transported by the grain stalk transport device 13 are transported rearward by being clamped by the feed chain 17 and the clamping rod, and threshed by the threshing unit 4. FIG. 2 shows the inside of a power transmission for transmitting power to the mowing unit 7 and the traveling unit. The transmission case 20 that houses the transmission is a case part 20 a that houses the planetary gear type continuously variable transmission 21 and a case part 2 that covers the belt type transmission 21.
The transmission case 20 has an input shaft 24 and a transmission shaft 25 suspended horizontally and horizontally at an appropriate distance.

A pair of speed change pulleys 29, 30 whose pulley diameters change reciprocally by operating a speed change lever 28 are mounted on the input shaft 24 and the speed change shaft 25 on the side of the transmission case 20b. , 30 with belt 3
2 is wound. Each of the speed change pulleys 29 and 30 includes split pulleys 29a and 30a fixed so as not to be movable in the axial direction and movable split pulleys 29b and 30b movable in the axial direction. Cooling fins are provided on the fixed split pulley side. The arm 35 on the lever operation shaft 33 and the arm 38 for moving the movable split pulley 30b on the speed change shaft 25 in the axial direction are connected by a rod 39. Further, the arm 40 for moving the movable split pulley 29b on the input shaft 24 and the arm 38 are linked to each other by another link 42. Reference numerals 44, 44 denote roller bearings supported by shafts 45, 45 fixed to the transmission case 20 side.
Cams 46 and 47 are provided between the arm 40 and the arms 40 and 38, and the shift lever 28 is operated back and forth to operate the lever operation shaft 33.
Is rotated, the movable split pulleys 29b, 30b are moved in the longitudinal direction of the shaft, and the pulley diameters of the speed change pulleys 29, 30 are changed. The rotation of the speed change shaft 25 is controlled by the speed change pulleys 29 and 30, the speed change belt 3
The transmission is shifted by a belt-type continuously variable transmission 22 comprising a sun gear 48 integrally formed on one side of the transmission shaft 25.

A ring gear 50 is mounted on a holder 49 rotatably fitted on the transmission shaft 25. The ring gear 50 is a driving gear 5 which rotates integrally with the input shaft 24.
Always meshed with 1. A plurality of planetary gears 52, 52 meshing with the sun gear 48 and the ring gear 50 are attached to an output gear 55 constituting a carrier, and the sun gear 48, which is power-transmitted via the belt-type continuously variable transmission 22, The orbital rotation of the planetary gears 52 provided between the ring gear 50 and the power transmitted without passing through the belt-type continuously variable transmission 22 is taken out from the output gear 55. Further, the output gear 55 meshes with a gear 57 on the intermediate shaft 56, and the gear 57 meshes with a gear 62 on the steering clutch shaft 60. Steering clutches 63, 63 are provided on the left and right of the steering clutch shaft 60, and gear portions 63 a, 63 a provided on the inner ends of the steering clutches 63, 63 are provided on internal teeth 62 a provided on the inner periphery of the gear 62 when the steering clutch 63, 63 moves straight. I try to mesh. Wheel gears 65, 65 mesh with gears 63a, 63a of the steering clutches 63, 63 to drive the traveling axles 67, 67.

At the time of turning, the steering clutch 63 is disengaged by tilting the power steering lever 68 provided in front of the cockpit 66 in either right or left direction.
When the vehicle 8 is depressed, the steering brake 69 is actuated, and the aircraft turns around the side where the steering clutch 63 is disengaged. When the power steering lever 68 is operated back and forth, the reaping unit 7 moves up and down.

A large-diameter gear 70 for driving not only the traveling system but also the mowing unit, which is a working unit, is removably attached to the output gear 55 with bolts 71. Is engaged with a gear 75 at the end of the output shaft 72 rotatably fitted to the input shaft 24. Input shaft 2
An input pulley 73 for receiving power from the engine 6 is attached to the shaft end of 4, and an output pulley 74 is fixed to the end of the output shaft 72 by spline fitting inside the input pulley 73. FIG.
As is clear from FIG. 7, a bearing 76 is interposed between the outer end of the boss portion of the output pulley 74 and the boss portion of the input pulley 73, and supports the two pulleys 73 and 74 in a state of approaching each other. . By providing the pulleys 73 and 74 close to each other in this manner, the configuration can be made compact and maintenance such as replacement of the belt can be facilitated.

The rotational power of the output pulley 74 is transmitted to the mowing unit 7 via the belt 77 and a gear mechanism (not shown), and the rotation in proportion to the vehicle speed is performed by the blade 10, the cereal stem raising device 11, and the cereal stem. The data is transmitted to the scraping device 12, the transport device 13, and the like. In the figure, reference numeral 79 denotes a belt for transmitting the power of the engine 6 to the input pulley 73, and reference numeral 80 denotes a tension pulley of the belt 32.

Next, the operation of the planetary gear type continuously variable transmission 21 will be described. When the engine 6 is rotating, the input shaft 24 is driven via the input pulley 93.
The ring gear 50 is driven to rotate via the drive gear 51. Since the transmission shaft 25 is also constantly rotating, the sun gear 48
The rotation direction of the output gear 55 is determined by the magnitude of the rotation speed of the ring gear 50 and the rotation speed of the sun gear 48 at this time. That is, the rotation (peripheral speed) of the sun gear 48 with respect to the ring gear 50 rotating in one direction at a constant rotation.
Is high, the planetary gears 52, 52 revolve around the sun gear 48 in the normal rotation direction (the forward direction in this embodiment) while rotating, and conversely, the rotation (peripheral speed) of the sun gear 48 is slow. In this case, the planetary gears 52 revolve around the sun gear 48 in the reverse direction (the reverse direction in this embodiment) while rotating. When the rotation speed (peripheral speed) of the sun gear 48 is the same as the rotation (peripheral speed) of the ring gear 50, the planetary gear 5
2, 52 rotate only and do not revolve.

As described above, by changing the rotational speed of the sun gear 48 by adjusting the forward / backward movement of the speed change lever 28, the rotation of the output gear 55 can be steplessly forward / reversely rotated. As a result, the shift lever 28
Operation to increase the vehicle speed from the neutral position to the forward acceleration
Alternatively, it can be adjusted from the neutral position to the reverse speed increasing side.

Next, the operation of the above example will be described. The input shaft 2 that is rotatably supported by the transmission case 20 with the rotational power of the engine 6
When performing the harvesting operation by transmitting the signal to the pulley 73 of No. 4, the operator tilts the shift lever 28 forward to move the machine forward. The diameter of the speed change pulleys 29 and 30 of the belt-type continuously variable transmission 22 is changed in accordance with the tilt angle of the speed change lever 28, and the rotation speed of the speed change shaft 25 is controlled. At this time, the revolving rotation of the planetary gears 52, 52, which are located between the sun gear 48 provided on the speed change shaft 25 and the ring gear 50 rotating at a constant rotation, are engaged with the gears 48, 50 and are being rotated. It is taken out from the output gear 55 and transmitted to the gear 57 of the intermediate shaft 56, and the rotation is further transmitted to the gear 62 on the steering clutch shaft 60.
To the gears 63a, 63a, wheel gears 65, 65
Are sequentially transmitted to the traveling axles 67, 67.

By tilting the shift lever 28 in the front-rear direction, the body can be steplessly shifted forward and backward, and neutrally stopped. On the other hand, the output gear 55
A large-diameter gear 70 is integrally fixed to the
Is constantly meshed with the gear 75, so that the rotational power proportional to the vehicle speed is transmitted to the output shaft 72 side, and the rotation is transmitted to the cutting section 7 side, which is a working section, via the output pulley 74. That is, the cutting blade device 10, the grain stem raising device 11, the grain stem scraping device 12, the transporting device 13, and the like are driven by rotation in proportion to the vehicle speed. It is sequentially conveyed rearward and threshed in the threshing unit 4 while being pinched by the feed chain 17 and the pinching rod. As described above, in this embodiment, since the cutting unit 7 is driven in accordance with the vehicle speed, the operation of the so-called pre-processing unit is delayed in the high-speed cutting operation, so that there is little possibility that a problem such as jamming of the grain stem occurs. Although the description is omitted in this embodiment, in driving the pre-processing unit of the combine, if the power that increases / decreases in accordance with the vehicle speed is supplied to the output shaft 72, the pre-processing unit operates in reverse when the aircraft moves backward. In order to control this, it is necessary to interpose a one-way clutch in the power transmission path on the mowing side. This one-way clutch is, for example, a transmission case 2
It may be provided between the output shaft 72 supported at 0 and the output pulley 74, or may be provided at the input pulley of the reaper.

In this embodiment, the combine harvester has been described as an example. However, the combine harvester may be applied to a tractor, a riding management machine, a rice transplanter, a vegetable harvester, or the like which requires a power take-out device. It is not limited to the embodiment. In any power agricultural machine, the input shaft and the output shaft after shifting are on the same left and right sides of the transmission case and are provided concentrically, thereby simplifying the transmission configuration and increasing the empty space. A clutch and the like can be installed, and the space can be effectively used.

[Brief description of the drawings]

FIG. 1 is a side view of a combine.

FIG. 2 is a sectional view showing a structure inside a transmission case.

FIG. 3 is a side view of the transmission case.

FIG. 4 is a plan view of a main part.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Combine 2 Traveling crawler 3 Traveling vehicle body 4 Threshing part 7 Cutting part 17 Feed chain 20 Transmission case 21 Planetary gear type transmission 22 Belt type continuously variable transmission 24 Input shaft 25 Output shaft 28 Shift lever

 ────────────────────────────────────────────────── ─── Continued on the front page F term (reference) 2B076 AA03 DA02 DA04 3D043 AA01 AA06 AB10 AB12 BA07 BC02 BC05 BC06 3J062 AA13 AB06 AB34 AC03 BA35 CG02 CG13 CG32 CG37 CG82

Claims (3)

[Claims] An input shaft is provided on one side of a transmission case for rotating by receiving rotation power of an engine, and transmissions for shifting the rotation power of the input shaft are provided in the transmission case. And the power shifted by the transmissions 21 and 22 is transmitted to the traveling axles 67 and 67, while the power branched in the middle of the traveling power transmission path is coaxially on the same side as the input shaft 24. A power take-out device for a power agricultural machine, wherein the power output is transmitted to an output shaft 72 for driving a working unit provided. 2. The transmission according to claim 1, wherein said transmission is a belt-type continuously variable transmission.
The power agricultural machine according to claim 1, characterized in that the stepless power is transmitted to the traveling axles (67, 67) and the output shaft (72) for driving the working unit. Power take-out device. 3. Pulleys 73 and 74 are attached to the end of the input shaft 24 and the end of the output shaft 72, respectively. The output pulley 74 is closer to the inside of the machine than the input pulley 73, and the output pulley 74 is attached to the machine. The power take-out device for a power agricultural machine according to claim 1 or 2, wherein the power take-out device is configured to be driven.