JP3111142B2 - Sheave case drive of threshing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a crank arm having a support shaft portion at both ends, an arm portion connected to each support shaft portion, and a connecting rod portion connecting the both arm portions to be rotatable. A sheave case of a threshing device configured so that a bearing is interposed between the split bearing bracket attached to the sheave case and the connecting rod part, and the sheave case is smoothly swung by a double-supported crank arm. Related to the drive unit.

[0002]

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

[0003]

However, since a large amount of dust due to sorting floats at the installation location of the crank arm, dust easily enters the sliding contact surface of the split bush, and the split bush is invaded by the dust. There is a risk of early wear, and there is 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 a bearing between a sheave case and a crank arm while smoothly swinging and driving a sheave case by a double-supported crank arm.

[0004]

A feature of the present invention is a crank arm having a support shaft portion at both ends, an arm portion connected to each of the support shaft portions, and a connecting rod portion connecting the two arm portions to each other. In a sheave case drive part of a threshing device in which a bearing is interposed between a bearing bracket attached to a sheave case and the connecting rod portion, the support shaft portion of the crank arm is
By supporting it on the side plate that forms the interior space of the sheave case,
The arm and the link are placed in the sheave case mounting space.
Position the connecting rod portion to form the crank arm
The support shaft portion, the arm portion, and the connecting rod portion.
Chi, wherein the connecting link portions fraction with both arm portions formed in a three-part structure wherein the crank arm and separately, in that the bearing and the rolling bearing was fitted on the connecting rod portions min.

[0005]

[Operation] In other words, while the sheave case is configured to be able to be smoothly swung by the double-supported crank arm,
The crank arm is divided into three parts with both arm parts and connecting rod part separate, so rolling bearings such as ball bearings and roller bearings can be adopted without restrictions on assembly, and rolling bearings have seals It is easy to prevent dust intrusion, and even if dust invades, it has a characteristic that it is less likely to be abraded by invading dust than a sliding bearing such as a bush, so the bearing between the sheave case and the crank arm Durability can be sufficiently improved.

[0006]

As a result, the durability of the bearing between the sheave case and the crank arm can be sufficiently improved while the sheave case is smoothly driven to swing by the double-supported crank arm. It is now possible to provide an excellent threshing device in terms of performance and maintenance.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 1, in a threshing apparatus 1 of a self-removing type combiner, a handling drum 2 is rotatably driven around a horizontal axis of a body in a handling chamber 3 so as to be rotatable. A receiving net 5 is provided between the sorting unit 4 and the lower sorting unit 4, a dust outlet 6 is formed at the rear end of the handling room 3, and the grain stalks nipped and transported by the feed chain 7 are handled in the handling room 3 to thresh. It is configured in. Then, the guide of the feed chain 7 is connected to the front guide portion 8a.
And a rear guide portion 8b.
Is bolted to the rear guide portion 8b so that it can be replaced with an appropriate length suitable for the model.

[0008] Sheave case 9 in the sorting section 4, Karino 1 for wind selection
No. 1 and No. 1 screw conveyors 11 and No. 2 screw conveyors 12 are provided, and the fine processed material leaking from the receiving net 5 and the coarse processed material falling from the dust outlet 6 are rocked and transferred backward. A sieving and air sorting process is performed while the kernels are transferred from the screw conveyor 11 for collecting the first material to the Glen tank and the like, and the second material that is not sufficiently sorted is transferred from the screw conveyor 12 for collecting the second material to the screw-type reduction device. It is configured to return to the front part of the sheave case 9 via the same 17. As shown in FIGS. 4 and 5, an intake port 29 and a suction fin 30 are provided on an input pulley 27 attached to a support shaft of the karano 10 for wind selection and an output pulley 28 for transmitting each rotating power 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 grain pan 13, a chaff sieve 14 for rough sorting, and a grain sieve 1 for fine sorting.
5, a straw rack 16 for discharging straw, etc., and the sheave case 9 is supported by a guide rail 18 and a sheave case drive unit 19 so as to be able to move back and forth.
By disassembling the sheave case 9, the sheave case 9 can be pulled out to the rear of the fuselage.

As shown in FIGS. 2 and 3, the sheave case driving portion 19 is constituted by supporting shaft portions 20a at both ends, arm portions 20b connected to the supporting shaft portions 20a, respectively.
A crank arm 20 having a connecting rod portion 20c for connecting the both arm portions 20b is attached to a bearing 22 attached to each of the left and right side plates 21 in a double-supported manner, and a split bearing attached to the left and right of the rear bottom surface of the sheave case 9. Connecting rod portion 2 of crank arm 20 with bracket 23
The right and left portions of the crankshaft 0c are linked to each other so as to swing the sheave case 9 by the rotation of the crank arm 20. Further, a balance weight 31 is attached to the connecting rod portion 20c to reduce vibrations caused by 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 into a three-part structure. 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
Roller bearing 26 with dust seal externally fitted to
Is provided between the bearing bracket 23 and the connecting rod portion 20c, so that the sheave case 9 is smoothly swung by the crank arms 20 supported by the left and right side plates 21 in a doubly supported manner. Connecting rod part 20
The rolling bearing 26 is adopted as a separate member from c, without any restrictions on assembly, and it is easy to prevent the intrusion of dust. Even if dust invades, the rolling bearing 26 is less likely to be worn by the invading dust. And sheave case 9
The durability between the bearing and the crank arm 20 is improved.

[Alternative Embodiment] The connecting structure between 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 configured in a pillow block shape in which the rolling bearing 26 is fitted, and the bearing bracket itself may be removed from the sheave case 9 when disassembled.

In the claims, reference numerals are provided for convenience of comparison with the drawings, but the present invention is not limited to the configuration shown in the attached drawings.

[Brief description of the drawings]

FIG. 1 is a longitudinal side view of a threshing apparatus.

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

FIG. 3 is a view taken in the direction of arrows AA in FIG. 2;

Fig. 4 Cross section of Karamin

5 is a view taken in the direction of arrows BB in FIG. 4;

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

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

8 is a view taken in the direction of arrows CC in FIG. 7;

[Explanation of symbols]

 9 Sheave case 20 Crank arm 20a Support shaft part 20b Arm part 20c Connecting rod part 23 Bearing bracket 26 Rolling bearing

Claims (1)

(57) [Claims] An arm portion (20) connected to each of the support shaft portions (20a) at both ends and each of the support shaft portions (20a).
b) a crank arm (20) having a connecting rod portion (20c) connecting the two arm portions (20b).
Are provided rotatably, and a bearing bracket (23) attached to a sheave case (9 ) and the connecting rod portion (20 ) are provided.
c) in a sheave case drive of a threshing device in which bearings are interposed between the shaft portions (20a) of the crank arm (20);
Side plates (2) forming an interior space of the sheave case (9)
1) in the space for the sheave case (9)
The two arm portions (20b) and the connecting rod portion (20
c) to form the crank arm (20).
The support shaft portion (20a) and the arm portion (20
b) of the connecting rod portion (20c), the two arm portions (20b) and the connecting rod portion (20c) are formed separately, and the crank arm (20) is formed into a three-piece structure, and the bearing A sheave case drive section of a threshing device in which a rolling bearing (26) is provided on the connecting rod portion (20c).