JPH07184466A - Thresher for combine harvester - Google Patents

Abstract

PURPOSE:To improve the driving efficiency of the first and the second conveyors in a threshing part of a combine harvester. CONSTITUTION:This thresher for a combine harvester equipped with the first conveyor (50) for taking out threshed grains in a threshing part (4) to the outside of the machine and the second conveyor (53) for returning the second returned material to the threshing part (4) is provided by installing the first and the second conveyors (50) and (53) in a chain driving structure and interposing a torque limiter device (82) in a chain driving system (87) of the conveyors (50) and (53).

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a threshing device for a normal combine harvester for harvesting grains such as rice, wheat and soybeans for threshing.

[0002]

2. Description of the Related Art A driving force is transmitted by a transmission belt to the first and second conveyors provided in this seed threshing section to drive them.

[0003]

However, in the case of such a belt drive, a large belt tension is required in order to secure the transmission force, so that the belt support structure is strengthened and a large number of tension rollers are installed. However, there is a drawback that the structure is complicated and the weight is increased.
This tendency was more remarkable as the size of the combine increased.

[0004]

Therefore, the present invention provides a combine threshing apparatus provided with a first conveyor for taking out threshed grains in a threshing section to the outside of the machine and a second conveyor for returning a second reduced product to the threshing section. , The first and second conveyors are provided in the chain drive structure, and the chain drive system of these conveyors is provided with a torque limiter device, and the driving force required to drive the first and second conveyors is provided. , Which can be easily secured by extremely lightweight and compact means, overload drive is also prevented by the torque limiter device, safety protection of the first and second conveyors and chain drive system can be achieved, and particularly large drive force is required. Suitable for large-sized ordinary combine harvesters.

[0005]

Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 is a side view of the first and second conveyor drive units, FIG. 2 is a side view of the combine as a whole, and FIG. 3 is a plan view thereof. In the figure, (1) is a traveling crawler (2) and a track frame (3). ) Equipped with a machine, (4) is equipped with an axial flow screw type handling cylinder (5), a processing cylinder (6), a sorting mechanism (7), etc., and a threshing unit mounted on the machine base (1). , (8)
Is a grain tank for storing the grains of the threshing section (4) taken out through the fried grain tube (9), and (10) is mounted in the lower front of the threshing section (4) so as to be able to move up and down through a hydraulic cylinder (11). The reaper to be installed, (12) is the driver's seat (13) and the operation unit (1
4) an operating cabin provided in front of the grain tank (8), (15) an engine section provided behind the grain tank (8) and having an engine (16) installed therein,
(17) is a grain carry-out auger for taking out grains in the grain tank (8).

The mowing section (10) connects the grain mowing header (18) for receiving the uncut grain culm and the rear center of the header (18) so that the mowing grain culm is threshing section (4). It is composed of a feeder house (19) to be fed to the uncut grass reel (20), a reciprocating drive type cutting blade (21), a weeding board (22), and a grain scraper auger. (23) and are provided in the grain header (18),
Supply chain conveyor (24) in which the cut culm to be taken into the header (18) is installed in the feeder house (19)
It is configured to be sent to the threshing unit (4) via the to perform threshing processing.

Further, a second reducing cylinder (25) is provided on the outer right side of the threshing section (4) so that the second processed product is returned to the processing cylinder (6) for re-thresholding and re-sorting. It is provided.

Further, as shown in FIGS. 4 to 5, the screw type handling cylinder (5) has a cylindrical body (26) having a length substantially equal to the longitudinal length of the threshing section (4), and this body ( 26) Spiral screw blades (2
7) and a dust projection (28) provided on the outer periphery of the rear end of the body portion (26), and the screw type handling cylinder (5)
Is supported in the longitudinal direction of the machine, and the feeder house (19)
The front end of the handling cylinder (5) is provided so as to face the inlet (30) on the front side of the handling room (29) communicating with the handling chamber (29), and the handling cylinder (5) is provided on the dust outlet (31) on the rear side of the handling room (29). The catching net (32) is stretched under the handling cylinder (5) excluding the dust discharge port (31) so that the rear end portion of the cutting barrel (5) is put in, and all the cut culms are fed from the feeder house (19). And then thresh.

Further, front and rear rocking sorters (33) and (34) constituting the sorter mechanism (7) are provided, and the swing link (3) is provided.
The sorting discs (33) (34) are swingably driven in the front-rear direction via 5), and the feed pan (36) located below the front part of the handling cylinder (5) and the grain leakage amount are adjustable. First chaff sheave (37) and its chaff sheave (3
7) The first sorting net (38) provided below and the sieving line (39) connected to the rear side of the chaff sheave (37) are provided on the front swing sorting disc (33) while the sieving line (39) is provided.
A second chaff sheave (40) provided below the rear side, and a sieving line (41) connected to the rear side of the chaf sheave (40),
The rear rocking sorter (34) is provided with a straw rack (42) positioned above the sieve line (41) and below the rear end of the receiving net (32) and the first and second-flow grain boards (43) (44). ).

Further, a dust removing fan (45) for supplying a sorting wind to the upper surface of the feed pan (36), and a first chaff sheave (37) and a first sorting net (38) below the first sorting net (38).
And the Kara-mino fan (48) that supplies sorting air through the second air passages (46) (47), and one that receives the grain from the first sorting net (38) and sends it to the fried grain barrel (9). Guard gutter (49) and first conveyor (50), and second chaff sheave (40)
A second sorting fan (51) that supplies sorting air to the lower side and the upper surface of the second-flow grain board (44), and two that sends the reduction products from the second-flow grain board (44) to the second-reduction cylinder (25). A gutter (52) and a second conveyor (53), and a third port (54) facing the sieving line (41) at the rear end of the sorting board (34),
The grain of the first gutter (49) is sent to the tank (8), and the reduced product of the second gutter (52) is sent to the processing cylinder (6).

As shown in FIG. 7, the engine (16)
Output shaft (16a) of the above is interlockingly connected to the counter shaft (55), and the output pulleys (56a) (56b) (56) (56a) (56b) (56) fixed to the counter shaft (55)
c), the input pulley (58) of the threshing input shaft (57) and the input shaft (59) of the traveling continuously variable transmission (HST) (59).
Interlocked with the input pulley (60) of a) and the input pulley (63) of the lower discharge auger (61) drive input shaft (62) of the grain tank (8) via each transmission belt (64) (65) (66). It is configured to be connected to each other to drive the threshing unit (4), the traveling crawler (2), and the grain tank (8).

The threshing input shaft (57) is interlockingly connected to the threshing counter shaft (67) through a reduction gear train (68), and the threshing drive case is connected to the handling barrel shaft (5a) of the handling barrel (5). A pulley (72) (7) is attached to a speed change shaft (71) connected through a high and low speed two-speed speed change gear train (70) in (69).
3) and the belt (74) through the counter shaft (6
7) are interlocked with each other to drive the handling cylinder (5) in two high and low stages.

Further, the counter shaft (67) is interlockingly connected to the swing counter shaft (76) of the PTO case (75) on the right rear side of the threshing unit (4) through the bevel gear (77), and the threshing unit (4) ) Lower rear swing drive shaft (78)
The swing counter shaft (76) is interlockingly connected to the outside of the threshing right side plate (4a) via the pulleys (79) (80) and the belt (81) to drive the swinging of the sorting boards (33) (34). Is configured to do.

Further, a drive sprocket (83) having a torque limiter (82), which is a torque limiter device, is attached to the swing drive shaft (78) projecting to the outside of the threshing left side plate (4b), And each conveyor shaft (50a) (53a) of the second conveyor (50) (53)
First and second sprocket (84) (8)
5) and the fan shaft (51) of the second sorting fan (51).
The drive sprocket (83) is interlockingly connected to a fan sprocket (86) attached to a) via a transmission chain (87) that is a chain drive system, and the fan shaft (48a) of the Karaino fan (48). To pulley (8
8) The second selection fan shaft (51a) is interlockingly connected via the (89) and the belt (90), and the threshing left side plate (4)
On the left outer side of b), the chain (87) drives the first and second conveyors (50) (53) and the second sorting fan (51), and the belt (90) drives the Karako fan (48).
Are configured to be driven respectively.

As shown in FIG. 6, the torque limiter (8
2) is the drive sprocket (83) which is supported by the swing drive shaft (78) in an idling manner and has an engaging claw (91) on the left side surface.
And a movable clutch body (9) having a meshing claw (92) on the right side surface, which is slidably fitted to the swing drive shaft (78).
3) and a torque spring (95) which is interposed between the clutch body (93) and the spring seat (94) to connect the engaging claws (91) (92) with a constant spring pressure, and the torque limiter (8).
When the transmission torque in 2) is above a certain level, the engagement of the engaging claws (91) (92) is released against the spring (95) to interrupt the transmission of the driving force.

By the way, as shown in FIG. 5, an inlet lead plate (97) for moving and guiding the particles to be shredded is provided on the inner surface of the upper cover (96) above the inlet (31) of the handling chamber (29). , A dust delivery valve (9) for guiding the movement of a plurality of particles to be shredded on the inner surface of the upper cover (96) behind the lead plate (97).
8) is provided, and the dust feeding valve (98) on the inlet side is opened to increase the dust feeding inclination angle (θ) so as to promote the movement toward the outlet side, and the dust feeding inclination angle is directed toward the outlet side. (Θ) is gradually reduced to a closed state to reduce the threshing load on the inlet side and to cope with a high threshing flow rate, preventing clogging of the handling cylinder (5). However, the fourth loss is configured to be reduced.

This embodiment is constructed as described above and requires a large tension on the chain (87) by driving the first and second conveyors (50) (53) by the chain (87). The first and second conveyors (50) (5) with a compact and lightweight structure that enable transmission of large power without slipping and at a constant speed ratio without slipping.
In 3), the drive can be performed with excellent efficiency without loss.

[0018]

EFFECTS OF THE INVENTION As is clear from the above examples, according to the present invention, the first conveyor (50) for taking out the threshed grains in the threshing section (4) to the outside of the machine and the second reduced product in the threshing section (4). In a combine threshing device having a returning second conveyor (53), the first and second conveyors (50) (53) are provided in a chain drive structure, and these conveyors (50) are also provided.
Since the chain drive system (87) of (53) is provided with the torque limiter device (82), the driving force required to drive the first and second conveyors (50) (53) is It can be easily secured by extremely lightweight and compact means, and overload drive is also prevented by the torque limiter device (82).
0) (53) and the chain drive system (87) can be safely protected, and a remarkable effect such as being most suitable for a large-sized ordinary combine combine requiring a large drive force is achieved.

[Brief description of drawings]

FIG. 1 is a side view of first and second conveyor drive units.

FIG. 2 is a side view of the entire combine.

FIG. 3 is a plan view of the entire combine.

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

FIG. 5 is an explanatory plan view of a threshing unit.

FIG. 6 is an explanatory diagram of a torque limiter.

FIG. 7 is an explanatory diagram of a threshing drive system.

[Explanation of symbols]

 (4) Threshing section (50) First conveyor (53) Second conveyor (82) Torque limiter (torque limiter device) (87) Transmission chain (chain drive system)

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Keita Kamikubo 1-32 Chayamachi, Osaka City Yanmar Agricultural Machinery Co., Ltd.

Claims (1)

[Claims] 1. A combine threshing apparatus comprising a first conveyor for taking out threshed grains in a threshing section to the outside of the machine and a second conveyor for returning a second reduced product to the threshing section, wherein the first and second conveyors are provided. A combine threshing device characterized by being provided in a chain drive structure and having a torque limiter device interposed in a chain drive system of these conveyors.