JP2002360038A - Structure for changing speed of raking reel in general- purpose combine harvester - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a speed-changing device having a compacted size of the device, and a simplified structure. SOLUTION: This speed-changing device is formed by coaxially attaching a plurality of driven sprockets having different numbers of teeth to a reel spindle of a raking reel, winding a reel-driving chain between one of the driven sprocket in the driven sprockets and a driving sprocket attached to a driving shaft to form a reel-driving structure, and enabling the driven sprocket wound by the reel-driving chain to be exchanged by a chained sprocket-exchanging operation means.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a squeeze reel transmission structure of a general-purpose combine.

[0002]

2. Description of the Related Art Conventionally, as one form of a general-purpose combine,
Some rake units are provided with a raking reel, the reel driving mechanism is interlocked to the raking reel, and the reel driving mechanism is provided with a transmission for changing the rotation speed of the raking reel.

[0003] The transmission has a split pulley linked to a raking reel, and the transmission can be steplessly changed by arbitrarily changing the diameter of the pulley. In some cases, the speed is continuously changed by a motor.

[0004]

However, in the above-described transmission, the size of the transmission is large and the mechanism is complicated, so that the number of parts is increased, which leads to an increase in cost and a reduction in maintainability. There is a problem that.

[0005]

Therefore, according to the present invention, a reaping unit is provided with a squeeze reel, a reel drive mechanism is interlocked to the squeeze reel, and the rotation speed of the squeeze reel is changed by the reel drive mechanism. In a general-purpose combine provided with a speed change device, a plurality of driven sprockets having different numbers of teeth are coaxially mounted on a reel support shaft of a take-up reel, and one of the driven sprockets is driven by a driven sprocket and a drive shaft. A reel drive chain is formed by winding a reel drive chain between the sprocket and a sprocket, and a transmission is formed such that the reel drive chain can be replaced with any of the driven sprockets by a chain replacement operating means. It is intended to provide a raking reel speed change structure.

The present invention is also characterized by the following configuration.

The chain changing operation means is connected to the loose side of the reel driving chain, and performs the chain changing operation on the loose side of the reel driving chain.

[0008] The chain change operation means is provided with a tension sprocket slidable in a direction substantially perpendicular to the rotation direction of the reel drive chain, and the tension sprocket is disposed near the driven sprocket.

[0009]

Embodiments of the present invention will be described below.

That is, a general-purpose combine equipped with the raking reel transmission structure according to the present invention has a basic structure as follows:
The reaping unit is provided with a raking reel, the reel driving mechanism is operatively connected to the raking reel, and the transmission mechanism for changing the rotation speed of the raking reel is provided to the reel driving mechanism.

As a characteristic structure, a plurality of driven sprockets having a different number of teeth are coaxially mounted on a reel support shaft of the raking reel, and one of the driven sprockets and a driving shaft mounted on a driving shaft. A reel drive mechanism is formed by winding a reel drive chain between the sprocket and the sprocket, and the transmission is formed such that the reel drive chain can be switched to any of the driven sprockets by a chain switching operation means.

Further, the chain change operation means is connected to the loose side of the reel drive chain, and performs the chain change operation on the loose side of the reel drive chain.
The chain change operation means includes a tension sprocket slidable in a direction substantially perpendicular to the rotation direction of the reel drive chain, and the tension sprocket is arranged near the driven sprocket.

[0013]

Embodiments of the present invention will be described below with reference to the drawings.

1 and 2 show a general-purpose combiner 1 according to the present invention. The general-purpose combiner 1 has a pair of left and right crawler-type traveling parts 3, 3 arranged at a lower portion of a body frame 2. The mowing unit 4 is attached to the front end of the body frame 2 via a transport unit 5 so as to be able to move up and down. A moving sorting unit 7 is provided, and a straw processing unit 8 is provided at an upper rear portion of the swinging sorting unit 7 and immediately after the threshing unit 6.

The general-purpose combiner 1 is provided with an operating section 9 at the front of the body frame 2 and directly above the transport section 5 and at a position immediately behind the operating section 9 and at a threshing section. A grain storage unit 10 is provided immediately above the grain storage unit 6, and a motor unit 11 is provided immediately after the grain storage unit 10.

The structure of each part of the general-purpose combine 1 will be described below.

[Traveling Section] The traveling section 3 has a traveling frame 12 attached to a lower portion of the body frame 2 as shown in FIG.
A drive wheel 14 is interlockedly connected to a front end of the traveling frame 12, while a free wheel 15 is rotatably supported at a rear end of the traveling frame 12, and a crawler belt 16 is provided between the drive wheel 14 and the idle wheel 15. The drive wheels 14 are linked to a transmission 13 which is arranged at the front of the body frame 2 and linked to the motor unit 11. In the figure, reference numeral 17 denotes a rolling wheel.

[Mowing Unit] As shown in FIG. 1, the cutting unit 4 has a platform 18 connected to the tip of the transporting unit 5 and a transverse feed auger 19 having an axis oriented in the left-right direction inside the platform 18. The cutting blade device 20 is laid horizontally at a position immediately before the transverse feed auger 19, and a divider 21 is disposed at a position immediately before the cutting blade device 20. The raking reel 22 is arranged via the elevating mechanism 23, the reel driving mechanism 45 is interlocked to the raking reel 22, and a transmission 46 for changing the rotation speed of the raking reel 22 is provided on the reel driving mechanism 45. ing.

In this way, the cereal rods planted in the field are squeezed by the raking reel 22 and the root portion of the cereal rods are cut by the cutting blade device 20. The harvested cereal rods are gathered in a substantially central portion of the container, and delivered to the rear transport unit 5.

At this time, the harvesting operation can be performed efficiently by changing the rotation speed of the raking reel 22 by the transmission 46 in accordance with the type of crop to be harvested, the posture of the grain stick, and the like.

In such a configuration, the gist of the present invention is that a plurality (two in this embodiment) of driven sprockets 48 and 49 having different numbers of teeth are coaxially mounted on a reel support shaft 47 of the raking reel 22. A reel drive chain 52 is formed by winding a reel drive chain 52 between one of the driven sprockets 48 (49) and the drive sprocket 51 attached to the drive shaft 50, and the reel drive chain 52 Of the driven sprocket by the chain change operation means 53
That is, the transmission 46 is formed so as to be replaceable with the transmission 48, 49.

That is, as shown in FIGS. 3 to 5, the reel drive mechanism 45 extends in the front-rear direction and
A reel support shaft 47 of the raking reel 22 extending in the left-right direction between the front ends of a pair of left and right elevating arms 54 forming a part of 23.
And the right end of the reel support shaft 47 extends to the right side of the right elevating arm 54, and a small-diameter driven sprocket 48 and a large-diameter driven sprocket 49 are coaxially arranged at the right end. On the other hand, a drive shaft 50 whose axis is oriented in the left-right direction is provided at the rear end of the right elevating arm 54, and a drive sprocket 51 is attached to the right end of the drive shaft 50, and both sprockets 48 (49), A reel drive chain 52 is wound between the members 51. 55 is a drive shaft support.

An input sprocket 56 is attached to the left end of the drive shaft 50, and a transmission chain 58 is wound between the input sprocket 56 and an output sprocket 57 provided on the conveyor 25 of the conveyor 5 described later. By turning the drive shaft 50, the drive shaft 50 is linked to the conveyor 25.

The transmission 46 is provided with a chain changing operation means 53.
Thus, the reel drive chain 52 is replaced with either the small-diameter driven sprocket 48 or the large-diameter driven sprocket 49 so that a two-step speed change can be performed.

That is, the chain change operation means 53 is
As shown in FIGS. 3 to 5, a left and right sliding action portion that slides in the left and right direction to change over the reel drive chain 52.
59, and an operation unit 60 that slides the left-right sliding action unit 59 in the left-right direction.

The right and left sliding action portion 59 is provided with a support member 61 at a front portion of the right lifting arm 54.
The slide support shaft 62 whose axis is oriented in the left-right direction is slidably supported in the left-right direction. A tension sprocket 63 is coaxially attached to the right end of the slide support shaft 62, and a pair of left and right The idler sprocket 66 is mounted in parallel with and close to the tension sprocket 63 via the support plate bodies 64 and 65. 63
a and 66a are sprocket spindles.

In this manner, the tension sprocket
63 is placed near the driven sprockets 48 and 49,
The reel drive chain 52 can be slid in the left-right direction substantially perpendicular to the rotation direction of the reel drive chain 52, and the slack side (upper rotation side) 52a of the reel drive chain 52 is arranged along the upper peripheral edge of the idler sprocket 66, while the tension sprocket 63 Around the lower edge of the tension sprocket 63
Thereby, tension is applied to the loose side 52a of the reel drive chain 52.

Further, the sliding movement of the slide support shaft 62 to the left allows the tension sprocket 63 and the idler sprocket 66 to be disposed so as to face the small-diameter driven sprocket 48 in the front-rear direction. By moving the tension sprocket 63 and the idler sprocket 66 in the front-rear direction by moving the tension sprocket 63 and the idler sprocket 66 in the front-rear direction, the tension sprocket 63 and the idler sprocket 66 The sprockets 63,
The reel drive chain 52 can be replaced with a small or large-diameter driven sprocket 48, 49 facing the front and rear direction 66.

The operation section 60 is provided with an operating arm support shaft 68a rotatably attached to the rear portion of the right elevating arm 54 via a bracket 67 so that the operating arm support shaft 68a is oriented in the left-right direction.
The base end of the operating arm 68 is attached to the right end of a, and the base of the link 70 is connected to the distal end of the operating arm 68 via a connecting pin 69, and the distal end of the link 70 and A tension spring 72 is interposed between the left support plate 64 and a connection arm 71 which is provided vertically.

A base end of an operating lever 73 is connected to a base end of the operating arm 68, and a front-rear sliding rod 74 formed to extend in the front-rear direction at the base end of the operating lever 73. A base end (rear end) is connected, and a speed changing yoke 75 is connected to a front end (front end) of the front-rear sliding rod 74.

The transmission yoke 75 is formed in a rectangular shape in a plan view, and has a middle part pivotally supported by the support member 61 via a pivot 76 whose axis is oriented in the vertical direction. The front part of the front-rear sliding rod 74 is slidably inserted in the front part of the front-rear sliding rod 74 through the rod connecting piece 77 provided at the side end. The rear pressing springs 78 and 79 are wound, and the front and rear pressing springs 78 and 79 connect the front and rear sliding rod 74 to the rod connecting piece 77. 85 and 86 are spring receiving pieces.

On the other hand, an engagement pin 80 whose axis is oriented vertically is attached to the other end of the transmission yoke 75.
An engagement groove formed at the left end of the slide support shaft 62
81 is engaged.

By rotating the operation lever 73 in the forward direction (rearward direction) in this manner, the front-rear sliding rod
When the 74 is slid forward (rearward), the transmission yoke 75 rotates counterclockwise (clockwise) about the pivot 76 in the plan view shown in FIG. Dowel pin 80
And the slide support shaft 62 interlockingly connected via the engagement groove 81 and
Slide to the left (to the right) and slide the shaft 62
Slide the tension sprocket 63 and the idler sprocket 66 attached to the right end of the sprocket to the left (to the right), and follow the sprockets 63 and 66 in the front-rear direction with a small-diameter (large-diameter) driven sprocket 48 (49). The reel drive chain 52 can be replaced with a new one.

At this time, when the operating lever 73 is rotated in the front-rear direction, the connecting pin 69 connecting the distal end of the operating arm 68 and the base end of the link 70 is moved to a position below the operating arm support shaft 68a. Since the tension spring 72 urges the fulcrum at a position beyond the fulcrum and between the fulcrum and the upper position, the operation lever 73 can be held at either the front or rear operation position.

Accordingly, a member for holding the operation position of the transmission lever 73 is not separately required, and a change in the tension force applied to the reel drive chain 52 by the tension urging force of the tension spring 72 can be reduced.

Further, a stopper receiving piece 82 is connected to the pivot 76 for pivotally supporting the transmission yoke 75 in a protruding manner in the front-rear direction, and when the transmission yoke 75 is rotated about the pivot 76, The front end 82a of the stopper receiving piece 82 abuts on the left rotation stopper piece 83 provided on the support member 61, and the transmission yoke 7
5, while the rear end portion 82b of the stopper receiving piece 82 abuts on the right-hand rotation stopper piece 84 provided on the support member 61, thereby turning the transmission yoke 75 to the right. The movement is regulated.

Here, the operating position of the transmission yoke 75 can be regulated by the front / rear pressing springs and the left and right rotation stopper pieces 83, 84. No thrust load acts on shaft 62,
As a result, wear of the slide support shaft 62 can be prevented.

Then, the left and right rotation stopper pieces 83, 8
4 has a variable speed yoke 75
Rotation restricting position, that is, the tension sprocket 63
In addition, the shift position of the idler sprocket 66 can be appropriately adjusted.

The front portion of the front-rear sliding rod 74 is slidably moved back and forth through a rod connecting piece 77 provided at one end of the speed change yoke 75, and is located in front of and behind the rod connecting piece 77. Before winding around the outer peripheral surface of the front and rear sliding rod 74
Since it is connected to the rod connecting piece 77 by the rear pressing springs 78 and 79, a return spring such as wire operation is not required, and the operation load can be reduced. The displacement of 75 can be absorbed, and it is not necessary to hold the operation lever 73 at the intermediate operation position.

[Transport Section] As shown in FIG. 1, the transport section 5 has a feeder house 24 extending in the front-rear direction attached to the front end of the body frame 2 so as to be vertically rotatable, and is transported inside the feeder house 24. While a conveyor 25 is provided, a front transport beater 26 is rotatably suspended above the front end of the body frame 2. In the figure, reference numeral 27 denotes a lifting hydraulic cylinder for raising and lowering the feeder house 24.

In this manner, the lateral auger of the reaper 4
The husks gathered by 19 are transported to the rear threshing unit 6 by the transport conveyor 25 and the front transport beater 26.

[Threshing Unit] As shown in FIG. 1, the threshing unit 6 forms a handling chamber 42 at a position immediately behind the transporting unit 5.
A cylindrical first handling cylinder 28 and a second handling cylinder 29 having substantially the same outer diameter are disposed at an interval in the front and rear direction with the rotation axis directed in the left-right width direction. Receiving net 30, just below 28, 29
31 are arranged.

In this way, the cereal rods conveyed by the conveying unit 5 are subjected to threshing while moving from the left end to the right end of the first handling cylinder 28 by the action of the first handling cylinder 28. The threshing process is performed while moving from the right end to the left end of the second handling cylinder 29 by the action of the second handling cylinder 29, and the grains pass through the receiving nets 30 and 31 by their own weights and are oscillated downward. While falling to the section 7, the straw is transferred to the straw processing section 8 behind.

Here, the outer diameter of the first handling cylinder 28 and the outer diameter of the second handling cylinder 29 are set to be substantially the same, and the threshing processing area in the second handling cylinder 29 is increased so that threshing can be performed smoothly and reliably. So that you can do it.

[Swing Sorting Unit] As shown in FIG. 1, the swing sorting unit 7 is provided at a position directly below the first handling cylinder 28 and the second handling cylinder 29 with the swinging body.
32 is arranged so as to be able to swing up and down via a swing mechanism 33. 39 is the first grain trough extending in the left-right direction to receive the first grain, 40 is the second grain trough extending in the left-right direction to receive the second grain, and 41 is Karamin.

[Straw Processing Unit] As shown in FIG. 1, the straw processing unit 8 is provided with a rear transport beater 90 at a position immediately behind the second handling cylinder 29 of the threshing unit 6. A straw cutter 92 is provided at a position behind the 90.

The straw that has been threshed in the threshing unit 6 is subjected to the action of the rear transport beater 90 to remove the straw.
After being conveyed to the hopper 92, the straw is cut into pieces by the cutter 92, and then discharged to the outside of the machine.

[Operation Unit] The operation unit 9 has a substantially rectangular box-shaped cabin 93 disposed at the upper center of the front end of the body frame 2 and a seat 94 disposed at the center rear of the cabin 93 in plan view. seat
A front column 95 is disposed at a position in front of 94, and a steering wheel 96 and a speed change lever 97 are provided at an upper end of the front column 95.

[Motor Unit] The motor unit 11 has an engine E disposed at the upper rear part of the body and transmits the engine E to each power mechanism unit such as the cutting blade device 20 and the transmission 13 (not shown).
Are interlocked and linked.

When the engine E is driven, each power mechanism operates in conjunction with each other.

FIG. 6 shows a general-purpose combine 1 as another embodiment. The general-purpose combine 1 is for cutting and threshing cereals such as soybeans. The general-purpose combine 1 has the basic structure described above. In the same manner, the operation unit 9 is disposed at the front part of the body frame 2 at the right side of the transport unit 5, and the handling cylinder 100 of the threshing unit 6 is disposed so that the axis is oriented in the front-back direction. Is different.

The general-purpose combiner 1 is equipped with a reel drive mechanism 45 having a transmission 46 according to the present invention. FIG. 7 shows a reel drive mechanism 101 for transmitting power to the reel drive mechanism 45. Further, an auger transmission mechanism 102 for transmitting power to the lateral feed auger 19 and a cutting blade transmission mechanism 103 for transmitting power to the cutting blade device 20 are shown.

These transmission mechanisms 101, 102, 103
A transmission shaft 104 provided in the front upper part of the feeder house 24 with its axis oriented in the left-right direction is shared, and each performs a transmission function.

That is, the reel transmission mechanism 101 includes the transmission shaft 1
A reel transmission chain 106 is wound around a reel transmission sprocket 105 provided on the 04 and an input sprocket 56 provided on the reel drive mechanism 45. 107 is a tension roller, and 108 is a transmission mechanism case.

The auger transmission mechanism 102 includes a transmission shaft 104
The auger transmission chain 111 is formed by winding an auger transmission chain 111 between an auger transmission sprocket 109 provided on the right side of the lateral auger support shaft 19a and an input sprocket 110 provided on the right end of the lateral feed auger support shaft 19a. 112 is a tension roller.

The cutting blade transmission mechanism 103 is provided between a cutting blade transmission pulley 113 provided on the transmission shaft 104 and a cutting blade driving input pulley 114 provided on a front portion of the right side wall of the platform 18. The cutting blade transmission belt 115 is wound and formed. 116
Is a cutting blade drive case interlocked with the cutting blade device 20, 117 is an input shaft, and 118 is a tension roller.

[0057]

According to the present invention, the following effects can be obtained.

According to the first aspect of the present invention, a plurality of driven sprockets having different numbers of teeth are coaxially mounted on the reel support shaft of the raking reel, and one of the driven sprockets and the driven sprocket are mounted on the drive shaft. A reel drive mechanism is formed by winding a reel drive chain between the drive sprocket and the driven sprocket, and the transmission is formed such that the reel drive chain can be switched to any of the driven sprockets by a chain switching operation means.

In this manner, by changing the reel drive chain to any one of the plurality of driven sprockets having different numbers of teeth by the chain changing operation means,
The rotation speed of the scraping reel can be changed.

Accordingly, in the above-described transmission, the size of the transmission can be reduced, and the mechanism can be simplified. Therefore, the number of parts can be reduced, and cost reduction and maintenance can be achieved. it can.

According to the second aspect of the present invention, the chain change operation means is connected to the loose side of the reel drive chain, and performs the chain change operation on the loose side of the reel drive chain.

As described above, since the reel drive chain is replaced on the loose side of the reel drive chain where the tension is relatively weak and almost stabilized, the operation load is small and the operation load is stabilized. The chain change operation can be performed easily and reliably.

According to the third aspect of the present invention, the chain changing operation means is provided with a tension sprocket which can be slid in a direction substantially perpendicular to the rotation direction of the reel drive chain, and the tension sprocket is a driven sprocket. It is located near.

As described above, since the tension sprocket is slid at the position near the driven sprocket, the reel drive chain can be reliably replaced by slightly sliding the tension sprocket. Thus, it is possible to prevent the chain change operation means from being excessively operated, and to efficiently change the reel drive chain.

[Brief description of the drawings]

FIG. 1 is a side view of a general-purpose combine provided with a raking reel transmission structure according to the present invention.

FIG. 2 is a plan view of the general-purpose combine.

FIG. 3 is an explanatory side view of the reel drive mechanism.

FIG. 4 is an explanatory plan view of the reel drive mechanism.

FIG. 5 is a sectional front view of the transmission.

FIG. 6 is a side view of a general-purpose combine as another embodiment.

FIG. 7 is an explanatory diagram of a transmission mechanism.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 General-purpose combine 2 Body frame 3 Running part 4 Cutting part 5 Transport part 6 Threshing part

Claims (3)

[Claims] 1. A general-purpose combiner comprising a reaping unit provided on a reaping unit, a reel drive mechanism connected to the rake unit in an interlocked manner, and a transmission device for changing the rotation speed of the rake unit provided on the reel drive mechanism. A plurality of driven sprockets having different numbers of teeth are coaxially mounted on the reel spindle of the raking reel, and a reel driving chain is wound between one of the driven sprockets and the driving sprocket mounted on the driving shaft. A general-purpose combine pulling reel transmission structure, wherein a transmission is formed by forming a reel driving mechanism by turning the reel driving chain to any driven sprocket by a chain switching operation means. 2. The general-purpose combiner according to claim 1, wherein the chain change operation means is connected to a loose side of the reel drive chain to perform a chain change operation on the loose side of the reel drive chain. Rake reel transmission structure. 3. A chain splicing operation means comprising a tension sprocket which is slidable in a direction substantially perpendicular to a rotation direction of a reel drive chain, and wherein the tension sprocket is arranged near a driven sprocket. The raking reel transmission structure of a general-purpose combine according to claim 2, wherein