JPS609070Y2 - Combine drive device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a drive device for transmitting engine rotation to a traveling section and a reaping section in a combine harvester.

The self-propelled combine harvester consists of a reaping section that harvests and transports the shell culms in the field, a threshing section that threshes and sorts the transported shell culms, a traveling section that carries these and runs, and other accessory devices. has been done.

Each of these devices is driven by an engine mounted on the machine base.

However, in conventional combine harvesters, each device in the reaping section is driven via a reaping drive shaft mounted above the rear end of the reaping section and a transmission shaft connected to this. is configured to drive this through a threshing input shaft, and the traveling section further drives this through a transmission within a gear box.

On the other hand, the reaping section needs to be raised and lowered when adjusting the reaping height or when traveling on the road. For this purpose, the upper end of the reaping frame that supports the entire reaping group is pivotally supported on the bearing of the reaping drive shaft. It is made to move up and down by swinging with a hydraulic cylinder.

It is desirable that the driving device for the traveling section and the reaping section, as well as the pivot structure of the reaping section, be made as small and simple as possible in order to downsize the machine and improve the transmission efficiency. In the case of small walk-behind combine harvesters, which have been developed in recent years to meet the needs of small-scale farmers, this is strongly required in order to make the machines more compact.

However, in the past, the reaping drive shaft and the reaping pivot were provided separately from the drive device for the traveling section, which hindered miniaturization and made the drive device extremely complex.

The present invention has been developed in view of the above points.The drive shaft and the reaping drive shaft driven by the drive shaft are supported by a gear box, and the reaping drive shaft is provided with a protrusion from the gear box that is concentric with the reaping drive shaft. By providing a pivot part to pivotally support the reaping part, and by connecting the transmission shaft that drives the reaping part and the reaping drive shaft with gears within this pivot part, the drive of the traveling part and the reaping part and the rotation of the reaping part are controlled. The present invention provides a drive device for a combine harvester in which support mechanisms are integrated into one gear box to streamline and downsize the equipment.

Hereinafter, its configuration and the like will be explained in detail with reference to embodiments shown in the drawings.

1 to 5 show a drive device for a combine harvester according to the present invention, FIG. 1 is a side view of a combine in which this is implemented, FIG. 2 is a front view of the drive device, and FIG. 4 is a vertical sectional view of FIG. 2, and FIG. 5 is a power transmission path diagram.

In these figures, the combine 1 consists of a reaping section 2, a threshing section 3, and a running section 4, and the reaping section further includes a cutting section 5 that scrapes out the husks in the field, and a section behind it that erects the fallen husks. a pulling device 6 for cutting the grass culm, a clipper-shaped cutting blade 8 installed close to the ground at the rear of the grass cutting rod 7 supporting the grass cutting body 5 and cutting the root part of the grass culm; It is composed of a shell culm conveying device 9 for conveying to the threshing machine 3, and the like.

In addition, the frame 10 of the threshing machine 3 includes a handling chamber 12 that stores a handling barrel 11, and a sorting chamber 14 that extends from below in the width direction of the machine and stores a sorting device including a winch 13 and others. is formed in a rectangular shape S', and is supported by fixing its legs to the traveling frame 15 of the traveling section 4.

Then, on the side of the handling chamber 12, a feed chain 17 that clamps and transfers the culm together with a clamping rod 16 is installed in the handling chamber 12.
2, and behind the threshing machine 3 there are a bagging device 18, a control box 19, and a straw cutter 20.
are arranged in parallel in the width direction of the machine.

Further, on the reaper 2 side of the frame 10, there is an inlet funnel 21 which is formed in a triangular shape in plan view and prevents particles scattered from the handling chamber 12 and particles shed from the shell culm during transportation.
The height of 0 is provided protruding toward the reaper 2 from the handling chamber entrance in the central part of S.

Further, the running section 4 is constituted by a pair of left and right running flora 25, each of which includes a drive wheel 22, a plurality of running wheels 23 attached to the running frame 15, and an endless crawler track 24 stretched between these wheels. ing.

Between the reaping section 2 and the threshing section 3, an engine 26 shown in Fig. 6 that drives each device of the machine is mounted with its output shaft 27 parallel to the direction of movement of the machine. ,
The output shaft 27 is connected to a hydraulic pump 28 mounted on the outside of the machine base, a drive device 29 to be described later, and an input shaft 3 of the threshing machine 3.
0 are connected by belts.

The drive device 29 is comprised of a gear device, etc. housed inside a gear box 31, and the gear box 31 extends from below the inlet funnel 21 toward the running section 4, as shown in FIG. is formed vertically.

As shown in detail in FIGS. 3 to 6, this gear box 31 is divided into a main body 32 and a thinner lid 33 in the axial direction of the internal shaft.
After storing the device inside, it is integrated with many bolts.

A convex portion is integrally formed near the upper end of the main body 32 by a box-shaped input box 32a that protrudes outward from the side plate of the main body 32.
An input shaft 35 is rotatably supported by an input bearing 34 attached to the side opening 32b of a.

Furthermore, an input pulley 3 is connected to one end of the input shaft 35 by a belt and connected to a pulley on the output shaft 27 of the engine 26.
6 is pivotally mounted, and a drive bevel gear 37 is pivotally mounted on the other end.

In the gear box 31, a drive shaft 38 orthogonal to the input shaft 35 is provided with one end pivotally supported by the side plate of the input box 32a and the other end pivotally supported by the lid body 33.
This drive shaft 38 has two gears meshing with the drive bevel gear 37.
The driven bevel gears 39 and 40 are freely rotatable with their tooth portions facing each other, and their movement in the axial direction is restricted.

Clutch surfaces are formed on opposing surfaces of these driven bevel gears 39 and 40.

Furthermore, a clutch 41 having clutch surfaces on both sides is non-rotatably but slidably fitted on the drive shaft 38 between the driven bevel gears 39 and 40 on both sides, and by sliding the clutch 41, The drive shaft 38 is selectively engaged with either of the clutch surfaces of the driven bevel gears 39, 40 to rotate the drive shaft 38 forward or backward.

Reference numeral 42 is a switch for sliding the input clutch 41, and is connected to an operating lever of the control box 19 via a shifter shaft and a wire (not shown).

Further, a speed change gear shaft 45 is supported below the drive shaft 38, and is driven by the meshing of gears 43 and 44. An integrally formed transmission gear 46 is fitted in a non-rotatable and slidable manner.

47 is a chic for sliding this speed change gear 46,
It is connected to an operating lever of the control box 19 via a thick shaft 48 and a wire (not shown).

Further, a speed change shaft 49 is pivotally supported below the speed change gear 46, and three gears 50 that selectively mesh with any of the gears by sliding the speed change gear 46 are mounted on the speed change shaft 49.
, 51 and 52 are pivoted.

Furthermore, a clutch shaft 53 is pivotally supported below the speed change shaft 49, and the clutch shaft 53 meshes with a gear 54 that is rotatably mounted on the speed change shaft 49, and has a clutch surface formed on both sides thereof. 55 is rotatably mounted.

Further, on the speed change shaft 49, there are two sliding gears 56.5 each having a clutch surface that meshes with the clutch surface of the clutch gear 55.
7 are non-rotatably but slidably fitted on both sides of the clutch gear 55, and between these outer surfaces and a brake plate 58 attached to the gear box 31, there is a brake surface that suddenly brakes the rotation of the clutch gear 55. is formed.

Reference numeral 59 denotes two shifters that slide the sliding gears 56 and 57, and are connected to a side clutch lever of the control box 19 via a thick shaft 60 and a wire (not shown).

A pair of left and right traveling drive shafts 61 and 62 are pivotally supported below the clutch shaft 53 and at the lower end of the gear box 31. Of these, the right traveling drive shaft 62 is supported on the left as viewed in the direction of travel. It is formed longer than the travel drive shaft 61, and these travel drive shafts 61, 62 are pivotally supported by a wheel vibro 3 that is separately provided and press-fitted into the gear box 31.

Further, the shaft support of the shorter traveling drive shaft 61 is the input shaft 3.
The shaft support No. 5 is formed in a convex portion having a constant height of S゛.

Note that the shorter running drive shaft 61 may be directly supported by the bearing portion without using the foil vibro 3, and FIG. 2 shows this state.

Gears 64 and 65 that mesh with the sliding gears 56 and 57 are respectively mounted on the running drive shafts 61 and 62, and drive wheels 22 of the running rollers 25 are mounted on both ends of the drive shafts 61 and 62, respectively. It is attached to the shaft.

The running roller 25 is mounted with its upper end facing a recess between the convex portions formed by the input shaft 35 and the travel drive shaft 61, respectively.

On the other hand, a reaping drive shaft 66 is supported at the upper end of the gear box 31 with both ends protruding from the gear box 31, and a chain wheel 67 is rotatably mounted on the reaping drive shaft 66. , is chain-connected to a chain wheel 68 on the drive shaft 38.

A one-way clutch is interposed between the chain wheel 68 and the drive shaft 38, which transmits the rotation to the chain wheel 68 only when the drive shaft 38 rotates in the forward direction.

Further, a clutch surface is formed on the side surface of the chain wheel 67 and engages with a clutch surface of a reaping latch 69 that is coaxially fitted in a non-rotatable but slidable manner.

70 is a shifter that slides the reaping latch 69,
It is connected to the reaping latch lever of the control box 19 via the thick shaft 71, the shifter lever 72, and a wire (not shown).

Furthermore, a bevel gear 7 is provided on the protruding portion of the reaping drive shaft 66 on the lid body 33 side.
3 is pivotally attached, and a pivot 74 is attached to the side surface of the lid body 33 and is concentric with the reaping drive shaft 66, which is formed in a bottomed cylindrical shape and covers the protrusion of the reaping drive shaft 66. ing.

As shown in FIG. 1, a pipe-shaped reaping frame 75 that supports the entire reaping machine 2 is rotatably supported on the pivot portion 74 at its upper end. A bevel gear 77 at the tip of the transmission shaft 76, which is supported through the transmission shaft, meshes with the bevel gear 73.

On the other hand, at the lower end of the gear box 31, a hydraulic cylinder 78 operated by the hydraulic pump 28 is rotatably supported by a mounting pin 79, and the tip of the piston is attached to the reaping frame 75. The reaping frame 75 is pivotally mounted at the center and is configured to swing around the pivot portion 74 by the operation of a hydraulic cylinder 78.

The input shaft 30 of the threshing machine 3, which is connected to the engine 26 by a belt, is connected to a bearing 80 near the upper end of the gear box 31.
The input pulley 81, which is loosely mounted on the input shaft 30, is connected to the driving pulley on the engine output shaft 27 by a belt.

Further, the projecting portion of the reaping drive shaft 66 on the main body 32 side is connected to the conveyance drive shaft 85 via a coupling 82 and bevel gears 83 and 84.

The drive device 29 configured in this manner is supported by fixing the main body 32 of the gear box 31 to the machine base.

In the combine constructed as described above, the rotation of the engine 26 is transmitted to the hydraulic pump 28, the input shaft of the drive device 29, and the input shaft 30 of the threshing machine 3.

The rotation of the input shaft 35 is transmitted to the drive shaft 38 as normal rotation or reverse rotation by operating the input clutch 41 and meshing it with one of the bevel gears 39 and 40.

Further, the rotation of the drive shaft 38 is transmitted to the speed change gear shaft 45 through the meshing of the gears 43 and 44, and further transmitted to the speed change shaft 49 by selecting and meshing the speed change gear 46 with one of the gears 5G and 51.52. be done.

The rotation of the speed change shaft 49 is transmitted to the clutch shaft 53 by the meshing of the gear 54 and the sliding gear 55, but during normal driving, the clutch gears 56 and 57 are both clutch-coupled with the sliding gear 55. Gear 56.57
The driving wheels 22 on both sides rotate due to the meshing of the gears 64 and 65, and the roller 25 runs.

When the machine is to be turned, one of the side clutch levers in the control box 19 is operated to slide the clutch gear 56 or 57 on the turning side. 22 is decelerated and the machine base turns.

In the case of an even sharper turn, the clutch gear 56 or 57
If it is slid further, the brake plate 58 is activated, the drive wheel 22 is suddenly braked, and the machine base turns sharply.

On the other hand, the rotation of the drive shaft 38 is transmitted to the reaping drive shaft 66 through the connection of the chain wheels 67, 68 and the reaping latch 69.
Further, due to the meshing of the bevel gears 73 and 77, the power is transmitted to the cutting blade 8 and the lifting device 6 via the transmission shaft 76 and the like.

Further, the rotation of the reaping drive shaft 66 is transmitted to the culm conveyance device 9 via the conveyance drive shaft 85 and the like by the engagement of the coupling 82 and the bevel gears 83 and 84.

On the other hand, the rotation of the intermediate shaft 30 of the thresher 3 is controlled by the handling cylinder 1.
The rotation of the first swing shelf 86 and the second spiral conveyor 87 is further transmitted to the first spiral conveyor 88 and the winnower 13, and from the winnower 13 to the straw cutter 20.

Further, the rotation of the handling cylinder 11 is transmitted to the feed chain 17.

Further, by operating the hydraulic pump 28, the hydraulic cylinder 78 is operated, and the reaping frame 75 swings around the pivot portion 74 of the gear box 31, and the entire reaping section 2 is moved up and down.

As is clear from the above explanation, according to the present invention, in a combine harvester, a reaping drive shaft, a traveling drive shaft, an input shaft for driving these, a drive shaft, and a power transmission device are pivotally supported by one gear box, and the reaping drive shaft is By providing a pivot part concentric with the protruding part of the shaft from the gear box to pivotally support the reaping part, and by connecting the transmission shaft that drives the reaping part and the reaping drive shaft with gears within this pivot part. Since the driving part of the traveling part, the driving part of the reaping part, and the pivot mechanism are combined into one gear box, the structure of the device is significantly streamlined and simplified, and the device is also made smaller. This is particularly effective for small combine harvesters.

[Brief explanation of the drawing]

1 to 5 show a drive device for a combine harvester according to the present invention, FIG. 1 is a side view of a combine in which this is implemented, FIG. 2 is a front view of the drive device, and FIG. 4 is a vertical sectional view of FIG. 2, and FIG. 5 is a power transmission path diagram. 1... Combine harvester, 2... Reaping section, 4
...... Traveling part, 26... Engine, 29
... Drive device, 31 ... Gear box, 32a ... Input box, 35 ...
Input shaft, 38... Drive shaft, 46... Speed change gear, 61.62... Travel drive shaft, 66...
...Reaping drive shaft, 73.77...Bevel gear,
75...Reaping frame, 76...Transmission shaft.

Claims (1)

[Scope of utility model registration request] a drive shaft that is pivotally supported near the top end of the gearbox and driven by an external drive source via an input shaft; a reaping drive shaft that is pivotally supported near the top end of the gearbox and driven by the drive shaft; a pair of travel drive shafts that are pivotally supported at the lower end and driven by the drive shaft via a transmission; A branch is provided, and the upper end of the reaping frame that supports the entire reaping group is pivotally supported on this pivot, and a transmission shaft that passes through the inside of the reaping frame and drives the reaping section and the reaping drive shaft are connected to the pivot. A drive device for a combine harvester, characterized in that gears are connected inside.