JPH089761A - Sheave case drive of thresher - Google Patents

Abstract

(57) [Abstract] [Purpose] To improve the durability of the bearing between the sheave case and the crank arm while smoothly swinging the sheave case with the cantilevered crank arm. [Structure] Support shaft portions 20a on both ends, and those support shaft portions 2
0a, a crank arm 20 having arm portions 20b connected to each other and a connecting rod portion 20c for connecting the both arm portions 20b is rotatably provided, and a bearing bracket 23 attached to the sheave case 17 and the connecting rod portion 20c. In the sheave case drive part of the threshing device in which a bearing is interposed between the bearing arms 23 and the connecting rod portion 20c of the crank arm 20, the bearing bracket 23 attached to the sheave case 17 and the connecting rod portion 20c are separated from each other. Equipped with rolling bearings 26 between.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is capable of driving and rotating a crank arm having a support shaft portion on both end sides, an arm portion connected to each of the support shaft portions, and a connecting rod portion connecting both the arm portions. The sheave case of the threshing device, in which a bearing is provided between the split type bearing bracket attached to the sheave case and the connecting rod portion, and the sheave case is configured to smoothly swing and drive by the both-sided crank arm. Regarding the drive unit.

[0002]

2. Description of the Related Art Conventionally, as shown in FIGS. 7 and 8, a crank arm supporting shaft portion 32, an arm portion 33, and a connecting rod portion 34 are integrally structured, and a split type bearing bracket 36 and a connecting rod of a sheave case 35 are connected. The bearing provided between the parts 34 is a split bush (sliding bearing) 37 due to restrictions on the assembly surface.

[0003]

However, since a large amount of dust is floating at the place where the crank arm is installed due to the sorting, dust easily enters the sliding contact surface of the split bush, and the split bush is caused by the intruding dust. There is a risk of early wear, and there was room for improvement in terms of improving the durability of the hair ring. It is an object of the present invention to sufficiently improve the durability of the bearing between the sheave case and the crank arm while smoothly swinging the sheave case by the cantilevered crank arm.

[0004]

A characteristic feature of the present invention is that a crank arm includes a support shaft portion on both ends, arm portions connected to the support shaft portions, and a connecting rod portion connecting the both support arm portions. In a threshing device in which a bearing is interposed between a bearing bracket attached to a sheave case and a connecting rod portion, a crank arm is formed into a three-part structure by separating both arm portions and the connecting rod portion from each other. The rolling bearing has the bearing fitted onto the connecting rod.

[0005]

That is, while the sheave case can be smoothly rocked and driven by the cantilevered crank arm,
Since the crank arm is divided into three parts by separating both arm parts and the connecting rod part separately, rolling bearings such as ball bearings and roller bearings can be adopted without restriction on assembly, and rolling bearings are sealed Since it can be configured to prevent dust from entering, and even if dust enters, it has the property of being less likely to wear due to intruding dust compared to sliding bearings such as bushings, so that the bearing between the sheave case and crank arm Durability can be improved sufficiently.

[0006]

As a result, the durability of the sheave case drive unit can be sufficiently improved while the sheave case is smoothly rockingly driven by the cantilevered crank arm, and the durability of the bearing between the sheave case and the crank arm can be sufficiently improved. It has become possible to provide a threshing device that is excellent in terms of maintenance and maintenance.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 1, in a threshing device 1 of a self-removing combine, a handling barrel 2 is rotatably supported in a handling chamber 3 about a horizontal axis of the machine front and rear, and the handling chamber 3 and its A receiving net 5 is provided between the lower sorting unit 4 and a dust outlet 6 formed at the rear end of the handling chamber 3 so that the grain culms sandwiched and conveyed by the feed chain 7 can be handled and threshed in the handling chamber 3. Is configured. Then, the guide of the feed chain 7 is connected to the front guide portion 8a.
And a rear guide portion 8b, and the front guide portion 8a
Is connected to the rear guide portion 8b by bolts so that it can be replaced with an appropriate length suitable for the model.

A sieve case 9 in the sorting section 4 and a Karato 1 for wind selection
0, 1 No. recovery screw conveyor 11, 2 No. reduction screw conveyor 12 are provided, and fine processed products leaking from the receiving net 5 and coarse processed products falling from the dust inlet 6 are oscillated and transferred backward. While sieving and wind sorting, the grain is transferred from the No. 1 recovery screw conveyor 11 to the grain tank, and the insufficiently selected No. 2 from the No. 2 recovery screw conveyor 12 to the screw type reduction device. It is configured to return to the front part of the sheave case 9 via 17. As shown in FIGS. 4 and 5, the intake port 29 and the suction fins 30 are provided on the input pulley 27 attached to the support shaft of the wind-sinking sardines 10 and the output pulley 28 for transmitting the power of each rotation of the sorting unit 4. The air is supplied by the fins 30 to improve the wind selection ability.

The sheave case 9 includes a Glen pan 13, a rough selection chaff sheave 14, and a precise selection Glen Sheave 1.
5. A straw discharge straw rack 16 and the like are provided, and the sheave case 9 is supported by a guide rail 18 and a sheave case drive unit 19 so as to be movable back and forth.
By disassembling 9, the sheave case 9 can be pulled out to the rear of the machine body.

As shown in FIGS. 2 and 3, in constructing the sheave case drive unit 19, support shaft portions 20a on both end sides, arm portions 20b connected to each of the support shaft portions 20a,
The crank arm 20 having a connecting rod portion 20c for connecting the both arm portions 20b is attached to the bearings 22 attached to the left and right side plates 21 in a cantilevered manner, and the split type bearing is attached to the left and right of the rear bottom surface of the sheave case 9. The connecting rod portion 2 of the crank arm 20 by the bracket 23
The left and right parts of 0c are interlocked with and the sheave case 9 is rocked by the rotation of the crank arm 20. Further, a balance weight 31 is attached to the connecting rod portion 20c to reduce the vibration associated with the swing drive.

The left and right arm portions 20b and the central connecting rod portion 20c are separated from each other to form the crank arm 20 in a three-part structure, and the connecting rod portion 20c is connected to the arm portion 20b by a key 24 and a retaining bolt 25. , Connecting rod portion 20c
Rolling bearing 26 with dust seal
Is provided between the bearing bracket 23 and the connecting rod portion 20c, and thus the sheave case 9 is smoothly oscillated by the crank arms 20 supported by the left and right side plates 21 in a cantilevered manner. Connecting rod part 20
c is used as a separate body and the rolling bearing 26 is adopted without any restrictions on assembly, and it is easy to prevent dust from entering, and even if dust enters, the characteristics of the rolling bearing 26 are less likely to cause wear due to intruding dust. And sheave case 9
The bearing durability between the crank arm 20 and the crank arm 20 is improved.

[Other Embodiment] The connecting structure of the arm portion 20b and the connecting rod portion 20c can be appropriately changed. The bearing bracket 36 of the sheave case 9 may be formed in a pillow block shape into which the rolling bearing 26 is fitted, and the bearing bracket itself may be removed from the sheave case 9 when disassembled.

It should be noted that reference numerals are given in the claims for convenience of comparison with the drawings, but the present invention is not limited to the configurations of the accompanying drawings by the entry.

[Brief description of drawings]

1 is a vertical side view of the threshing device.

FIG. 2 is a rear view of a longitudinal section of the sheave case drive unit.

FIG. 3 is a view taken along the line AA of FIG.

[Figure 4] Cross section of Kara Minoh

5 is a view taken along the line BB of FIG.

FIG. 6 is a side view of the threshing feed chain portion.

FIG. 7 is a sectional view of a main part of a conventional example.

FIG. 8 is a view on arrow CC of FIG.

[Explanation of symbols]

 9 sheave case 20 crank arm 20a support shaft portion 20b arm portion 20c connecting rod portion 23 bearing bracket 26 rolling bearing

Claims (1)

[Claims] 1. A support shaft portion (20a) on both end sides, and an arm portion (20) connected to each of the support shaft portions (20a).
b), a crank arm (20) having a connecting rod portion (20c) for connecting both arm portions (20b) to each other.
And a bearing bracket (23) attached to the sheave case (17) and the connecting rod portion (20).
In the sheave case drive part of the threshing device in which a bearing is interposed between c), the both arm parts (20b) and the connecting rod part (20).
c) is formed separately, and the crank arm (20) is formed into a three-part structure, and the bearing is connected to the connecting rod portion (20).
The sheave case drive of the thresher, which is a rolling bearing (26) fitted onto c).