JPH104760A - Threshing unit structure of combine - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To facilitate maintenance of a power transmission mechanism to a handling cylinder and to perform opening and closing operations of a front wall in a threshing unit in which a handling wall is freely opened and closed and a handling cylinder is detachable. Lighter weight and easier connection / separation of the power cylinder and the power transmission mechanism. SOLUTION: A front wall of a handling room for accommodating a handling cylinder is configured to be openable and closable about a rotation axis provided on a side edge of the front wall, and a shaft is attached to the front wall and a machine frame of a combine. A power transmission mechanism is interposed between the output shaft and the output shaft, and the power transmission mechanism includes an output pulley fitted to the output shaft and a front support supported by the front wall and connected to the handle cylinder in conjunction with the output pulley. It comprises a passive pulley fitted on a shaft, an interlock belt wound around each of the pulleys, and a dog clutch interposed between the front support shaft and the handling cylinder.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a structure for a threshing unit of a combine.

[0002]

2. Description of the Related Art Conventionally, in a threshing unit of a combine, a handling drum pivotally supported in a handling room is driven by power from a motor unit transmitted through a belt-type power transmission mechanism.

There is also a threshing unit in which the front wall of the handling room is freely openable and closable so that the handling cylinder is detachable. In this threshing unit, the power transmission mechanism is provided behind the handling room.

[0004]

However, in the threshing unit in which the power transmission mechanism is provided behind the handling room, a straw processing unit is provided behind the handling room, and a grain tank and a grain culm transport mechanism are provided on the left and right sides. However, there is a problem that the space behind the handling room is narrow and it is difficult to maintain the power transmission mechanism.To solve this problem, a power transmission mechanism is installed on the front wall of the handling room. When the front wall is opened, not only the work of dividing the power transmission mechanism into the handling cylinder when opening the front wall, but also the work of aligning the end of the power transmission mechanism with the handling cylinder after closing the front wall is required. It was troublesome.

[0005]

Therefore, according to the present invention, a front wall of a handling chamber for accommodating a handling cylinder is configured to be openable and closable about a rotation shaft provided on a side edge of the front wall. A power transmission mechanism is interposed between the front wall and an output shaft pivotally supported by the combine machine frame. The power transmission mechanism includes an output pulley fitted to the output shaft, and a shaft supported by the front wall. And a passive pulley fitted on a front support shaft interlocked with the handle cylinder, an interlock belt wound around each of the pulleys, and a dog clutch interposed between the front support shaft and the handle cylinder. It is an object of the present invention to provide a structure for a threshing unit of a combine, which is characterized in that it is configured.

Further, the present invention has the following features.

The dog clutch is provided near an intersection of a perpendicular drawn from the axis of the rotation shaft to the axis of the handle cylinder.

[0008] The engagement claws of the dog clutch are provided with an inclined angle at the contact surfaces thereof, and the engagement claws are formed so as to bite into each other.

A cylindrical centering ring is externally fitted to one outer periphery of the engaging claw, and the inner peripheral surface of the centering ring is brought into contact with the outer peripheral surface of the other engaging claw, thereby providing a front-end. The axis of the part support shaft and the handle cylinder should be aligned.

[0010]

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

FIGS. 1 and 2 show a combine A having a threshing unit structure according to the present invention. In the drawings, reference numeral 1 denotes a track frame equipped with a pair of right and left crawler-type traveling devices 2; A machine erected on the truck frame 1,
Numeral 4 denotes a threshing unit in which a feed chain 5 is stretched to the left and a handling cylinder 6 and a processing cylinder 7 are built in. Numeral 8 denotes a mowing unit equipped with a cutting blade and a grain culm transport mechanism. A straw processing unit provided with 11, a driving unit 12 provided with a driver's seat 13 and a driving operation unit 14, a motor unit 15 incorporating an engine 16, 17
Is a grain tank, 18 is a frying cylinder, 19 is a swing sorting section,
While traveling on the field by the operation of the operation operation unit 14, the grain stalks cut by the cutting unit 8 are threshed by the threshing unit 4, and the thresh is separated into grains and straw by the rocking sorting unit 19. The grains are stored in the grain tank 17 via the fryer cylinder 18, and the straw is discharged outside the machine via the straw chain 10 and the straw tine 11 of the straw processing unit 9. .

The threshing unit 4 includes, as shown in FIGS.
A handling cylinder 6 having a shaft center in the front-rear direction is rotatably supported inside a handling chamber 21 having a grain culm passage 20 extending between the lower front side and the lower left side. Many protruding teeth 22
Thus, the grain is threshed from the tip of the cereal stem passing through the cereal stem passage 20.

As shown in FIG. 4, a large number of handling cylinders 6 are provided on an outer peripheral surface of a drum 26 comprising a substantially cylindrical outer peripheral wall 23 and front and rear disks 24 and 25 having front and rear end faces of the outer peripheral wall 23 closed. The handling teeth 22 are protruded, and the handling cylinder shaft has a hexagonal cross section at the center of the front and rear disks 24, 25.
27, and is fixed to the front and rear disks 24, 25 via front and rear flanges 28, 29 fixed to the front and rear ends of the handling cylinder shaft 27, respectively.

As shown in FIGS. 3 to 5, the handling room 21 includes an openable and closable upper cover 30 forming an upper surface and an upper portion of a left side surface, a crimp net 31 which forms a lower surface, and a front and openable front wall 32. , Which is formed by a right wall 34 and a rear wall 35 fixed to the machine frame 33, and connects the left front end of the upper cover 30 to the left end of the front wall 32.
A releasable lock mechanism 36 keeps the upper cover 30 and the front wall 32 closed. In the figure, reference numeral 37 denotes a position regulating member which is disposed below the lock mechanism 36 and regulates a fixed position of the connection between the upper cover 30 and the front wall 32. Reference numeral 38 denotes a detent mechanism, which can temporarily fix the degree of opening of the front wall 32 in three stages. In FIG. 5, 32
b is a safety cover that covers the power transmission mechanism B.

As shown in FIG. 3, the upper cover 30 has an inner lid 39 curved from the middle to the left edge, and a combine A
The upper end of the upper cover 30 is pivotally connected to a pivot 41 provided on the upper edge of the right wall 34 so as to be rotatable. The upper and left side surfaces of the handling room 21 can be opened.

As shown in FIGS. 3 and 4, the crimping net 31 is a wire netting which is curved so as to maintain a fixed gap with the rotation locus of the tip of the tooth 22 and opens the upper cover 30. Then, the crimping net 31 can be attached and detached while being turned counterclockwise as viewed from the front.

As shown in FIGS. 4 to 6, the front wall 32 is provided with a gap between the lower end edge and the front end edge of the crimping net 31 so as to allow passage of the grain stalk.
The lower half 32a of the front wall is formed in a thin box shape to enhance rigidity, and a plurality of hinge rotation shafts 45 attached to the front edge of the right wall 34 are attached to the right end of the front wall 32. The rim is pivotably connected to the front so that the front surface of the handling chamber 21 can be opened.

The handle cylinder 6 is provided with a front shaft support provided on a front wall 32.
The front support 46 is rotatably supported between a rear support 46 and a rear support 47 provided on the rear wall 35. The front support 46 is, as shown in FIGS. At the approximate center of 32a, the front support shaft insertion hole
A front support shaft 49, which is formed by forming the front support shaft insertion hole 48, is mounted substantially at the center of the outer surface of the lower half portion 32a of the front wall. It is rotatably supported by bearings 51, and a dog clutch 52 is attached to the inner end of the front support shaft 49.
The dog clutch is attached to the front end of a hexagonal tubular handle cylinder shaft 27 through which the one engaging claw 53 is connected and the axis of the handle cylinder 6 is inserted.
When the front wall 32 closes the handling chamber 21, the engaging claws 53, 54 engage with each other, and the front wall 32
When the handle room 21 is opened, the engagement is released.

Then, as shown in FIG. 8, each of the engagement claws 53, 5
4 The contact surfaces 53a and 54a of each other are formed as follows. That is, an advancing angle of the inclination angle θ is provided on the contact surface 53a (front surface) of the engagement claw 53 on the front support shaft 49 side, and the contact surface 54a (rear surface) of the engagement claw 54 on the handle cylinder shaft 27 side is provided. When the power is transmitted from the front support shaft 49 side to the handle cylinder shaft 27 side by providing the receding angle of the inclination angle θ, the engagement claws 53 and 54 bite each other to ensure the engagement,
The play in the axial direction is prevented, and the power transmission is stabilized. In addition, the receding angle is also provided on the (rear surface) of the engaging claw 53 on the front support shaft 49 side, and the advancing angle is provided on the (front surface) of the engaging claw 54 on the handling cylinder shaft 27, so that the handling cylinder (6) When the front support shaft 49 is driven in reverse by the inertia of the above, the engagement claws 53 and 54 can bite each other to ensure the engagement.

A short cylindrical centering ring 55 is fitted around the outer periphery of the engaging claw 54 on the handle cylinder 6 side, and the front center end of the centering ring 55 is expanded toward the front. A tapered guide surface 55a is formed to engage the dog clutch 52 with the guide surface 55a and the engaging claw 5 on the front support shaft 49 side.
3 by sliding contact with the outer peripheral surface 53b,
Guides the dog clutch 52 on the side of the handle cylinder shaft 27 that is cantilevered, aligns the axis of the handle cylinder shaft 27 with the axis of the front support shaft 49, and adjusts the inner circumferential surface of the centering ring 55 to the front. Engagement claw on the part support shaft 49 side
The contact of the shaft 53 with the outer peripheral surface 53b keeps the axis aligned, and the power is transmitted by the engaging claws 53 and 54.

FIG. 6 shows another embodiment of shaft alignment.
As shown by the dashed line, a tapered projection 90 is formed at the center of the front end face of the handling cylinder shaft 27, while a tapered hole 91 corresponding to the tapered projection 90 is formed at the center of the inner end face of the front support shaft 49, and the taper is formed. When the protrusion 90 enters the tapered hole 91, the front support shaft 49
The axis of the handle cylinder shaft 27 may be made to coincide with the axis of.

In particular, the dog clutch 52 is disposed in the vicinity of the intersection of a perpendicular drawn from the axis of the rotating shaft 45, which is the opening / closing operation center of the front wall 32, to the axis of the handling cylinder 6, At the final connecting position of 52, the direction of separation of the engaging claws 53, 54 is substantially parallel to the axis, and the centering action by the guide surface 55a can be received over the entire circumference. In FIG. 4, reference numeral 42 denotes a partition plate, 43 denotes a front winding prevention plate, 44 denotes a rear winding prevention plate, 56 denotes a straw processing unit drive pulley, and 57 denotes a straw processing unit drive belt.

As shown in FIGS. 4 and 9, the rear shaft support portion 47 has a rear support shaft insertion hole 58 formed at the center of the rear wall 35.
The rear support shaft 59 inserted through the rear support shaft insertion hole 58 is
It is rotatably supported by a rear bearing 61 in a flange type rear bearing box 60 attached to the rear side surface, and a hexagonal indentation 62 is continuously provided at the inner end of the rear support shaft 59, as described above. It can be inserted into the rear end of the hexagonal tubular handle shaft 27.

In particular, as shown in FIGS. 4 and 9, the front end of the indentation body 62 can be inserted to the inside of the rear flange 29, and the handle cylinder 6 is cantilevered when the front wall 32 is opened. The rigidity of the part is increased.

With this configuration, when the lock mechanism 36 is released, the upper cover 30 is opened, the crimp net 31 is removed, and when the front wall 32 is opened, the engagement of the dog clutch 52 is released.
The connection between the front support shaft 49 and the front end of the handle shaft 27 is released. In this state, the handling chamber 6 can be easily pulled out by pulling the handling cylinder 6 forward.
Can be taken out of the cylinder. The handling cylinder 6 can be mounted in the handling room 21 in the reverse order.

The power transmission mechanism B to the handling cylinder 6 is shown in FIGS.
As shown in the figure, a gear box 64 having a built-in meshing bevel gear 63 is arranged on the right outside the handling chamber 21, and an input pulley 66 is fitted to a left-right input shaft 65 extending from the gear box 64, The output pulley 69 is fitted to the front end of an output shaft 68 extending in the front-rear direction extending from the gear box 64, and is connected to the engine 16 of the prime mover unit 15 via an input belt 67, and is attached to the front end of the front support shaft 49. A passive pulley 70 is fitted, and an interlock belt 71 is wound between the output pulley 69 and the passive pulley 70 so as to transmit power from the engine 16 to the handling cylinder 6. The output pulley 71, the output pulley 69, and the passive pulley 70 are constituted by a V belt and a V pulley, respectively.

A tension mechanism 72 is attached to the outer surface of the front wall 32 to apply a required tension to the interlocking belt 71 to prevent the interlocking belt 71 from coming off and reducing the transmission power. The tension mechanism 72 forms the outer periphery of the front bearing box 50 into a circular cross section to form a tension fulcrum 73, and the bending portion of a substantially L-shaped tension lever 74 is rotatably fitted to the tension fulcrum 73, A tension pulley 75 is pivotally supported at one end of the tension lever 74, and a spring seat 77 in which an adjustment bolt 76 is screwed is provided on the outer surface of the front wall 32 to protrude.
A tension spring 78 is suspended between the adjustment bolt 76 and the other end of the tension lever 74, and the outer circumference of the interlocking belt 71 is pressed inward by the tension of the tension spring 78.

A refraction assisting device 79 having a substantially L-shaped cross section is provided.
Protruding from the front of the machine frame 33 in proximity to the hinge pivot shaft 45 to regulate the bending position of the interlock belt 71, thereby substantially reducing the tension of the interlock belt 71 regardless of whether the front wall 32 is opened or closed. By keeping it constant, the interlocking belt 71 is easily bent, and the interlocking belt 71 is prevented from coming off.

The embodiment of the present invention is configured as described above, and the power transmission mechanism B to the handling cylinder 6 is disposed on the outer surface of the front wall 32 of the handling cylinder 6, so that the power transmission is performed. The maintenance of the mechanism B becomes easy, and the lock mechanism 36 is released to release the front wall 32.
Is released, a part of the power transmission mechanism B to the handling cylinder 6
The connection between the power transmission mechanism B and the handle cylinder 6 is released by rotating integrally with the handle 32, and the handle cylinder 6 can be easily taken out.

[0030]

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

According to the first aspect of the present invention, the front wall of the handling chamber for accommodating the handling cylinder is configured to be openable and closable about a rotation axis provided at a side edge of the front wall, and to be connected to the front wall by the same. A power transmission mechanism is interposed between the output shaft and the output shaft that is supported by the machine frame of the combine. The power transmission mechanism includes an output pulley fitted to the output shaft, A passive pulley fitted to the front support shaft interlockingly connected to the pulley, an interlock belt wound around each of the pulleys, and a dog clutch interposed between the front support shaft and the handling cylinder. When the front wall is opened, the power transmission mechanism is divided into the front support shaft side and the handle cylinder side at the location of the dog clutch, and in this state, the handle cylinder is pulled out to facilitate handling from the handling chamber. The torso can be taken out, and the handling cylinder can be installed in the handling room in the reverse order to the Supporting the front part, and it is possible to transmit the power.

According to the second aspect of the invention, the dog clutch is provided near the intersection of a perpendicular line drawn down from the axis of the rotating shaft to the axis of the handle cylinder, so that the final engagement of the dog clutch is achieved. In the position, the direction of separation of the engagement claws is substantially parallel to the axis, and the centering action by the guide surface can be received over the entire circumference.

According to the third aspect of the present invention, the engaging claws of the dog clutch are provided with an inclined angle on the contact surfaces thereof, and the engaging claws are formed so as to bite into each other. The meshing is ensured by the bite, the backlash in the axial direction is prevented, and the power transmission can be stabilized.

According to the fourth aspect of the present invention, a cylindrical centering ring is externally fitted on one outer periphery of the engaging claw, and the inner circumferential surface of the centering ring is fitted on the outer circumferential surface of the other engaging claw. By simply contacting the front wall, it is possible to automatically align the axis of the front support shaft with the handle cylinder simply by closing the front wall, and there is no need for separate centering work. Can be simplified.

[Brief description of the drawings]

FIG. 1 is a side view of a combine having a threshing unit structure of the present invention.

FIG. 2 is a plan view of the same.

FIG. 3 is a front view of a threshing unit.

FIG. 4 is a sectional plan view of a threshing unit.

FIG. 5 is a plan view of a front wall.

FIG. 6 is a cross-sectional plan view of a front wall.

FIG. 7 is a sectional plan view of a front support shaft.

FIG. 8 is a development view of the outer peripheral surface of the engagement claw.

FIG. 9 is a cross-sectional plan view of a rear support shaft.

[Explanation of symbols]

 A Combine B Power transmission mechanism θ Tilt angle 6 Handle cylinder 21 Handling room 32 Front wall 33 Machine frame 45 Rotating shaft 49 Front support shaft 52 Dog clutch 53 Engagement claw 53a Contact surface 54 Engagement claw 54a Contact surface 55 Centering ring 68 Output shaft 69 Output pulley 70 Passive pulley 71 Interlocking belt

Claims (4)

[Claims] 1. A front wall (32) of a handling room (21) for storing a handling drum (6).
Is configured to be openable and closable about a rotation shaft (45) provided on a side edge of the front wall (32), and is attached to the front wall (32) and the machine frame (33) of the combine (A). A power transmission mechanism (B) is interposed between the output shaft (68) and the output shaft (68), and the power transmission mechanism (B) includes an output pulley (69) fitted to the output shaft (68), It is wound around the pulleys (69) and (70) that are mounted on the front support shaft (49) that is supported by the front wall (32) and is interlocked with the handling cylinder (6), and that is attached to the pulleys (69) and (70). A threshing unit structure for a combine, comprising an interlocking belt (71) and a dog clutch (52) interposed between the front support shaft (49) and the handling cylinder (6). 2. The dog clutch (52), wherein:
2. A threshing unit structure for a combine as claimed in claim 1, wherein said threshing unit is provided in the vicinity of an intersection of a perpendicular line drawn down from the axis of (45) to the axis of said cylinder. 3. An engagement pawl (53) (5) of said dog clutch (52).
4) The abutment surfaces (53a) and (54a) of the competitors are provided with an inclination angle (θ), and the engaging claws (53) and (54) are formed so as to bite into each other. Threshing unit structure of combine. 4. A cylindrical centering ring (55) is externally fitted on one outer periphery of the engaging claws (53) (54) to form a coaxial centering ring (5).
The inner peripheral surface of (5) is brought into contact with the outer peripheral surface of the other engaging claw, so that the axes of the front support shaft (49) and the handle cylinder (6) are aligned. The threshing unit structure of the combine described.