JPH08280234A - Supporting mechanism of feed chain - Google Patents

Abstract

PURPOSE: To provide a supporting mechanism of a feed chain capable of lifting and oscillating the feed chain without being affected by moment applied to a supporting shaft by supporting a sprocket shaft at positions on the front right and left sides of threshing part frame body. CONSTITUTION: A feed chain 17 for conveying grain culms is longitudinally stretched on the side of a threshing part and the front sprocket 26 for rolling the feed chain 17 is supported on a sprocket shaft 34 horizontally installed on the frame body 16 side of the threshing part frame and the rear of a chain frame 24 in which the feed chain 17 is stretched is attached so as to enable lifting, lowering and oscillating round the sprocket shaft 34 and the sprocket shaft 34 is supported at the positions on both right and left sides in the front of the threshing part frame body 16.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a feed chain support mechanism for conveying grain culms provided in a threshing device such as a combine harvester.

[0002]

2. Description of the Related Art Conventionally, a feed chain for transporting grain culms in a threshing portion is, as shown in Japanese Patent Laid-Open No. 5-276826, a rear sprocket for winding the feed chain, which protrudes from the left side surface of the threshing portion frame. There is known a structure in which the front of the feed chain is rotatable upward around a rotation shaft.

[0003]

However, since the rotating shaft of the sprocket is supported only on the left side surface of the threshing part frame, the bending moment generated on the rotating shaft due to the load of the feed chain or the like can be set at one point (rotating shaft Support points) will be received. For this reason, especially when the front of the feed chain rotates upward and the bending moment applied to the rotating shaft becomes large, an excessive force is applied to the supporting point of the rotating shaft, the supporting state of the rotating shaft becomes unstable, or the rotating shaft itself. Due to the deformation of the supported portion of the feed chain, the rotation posture of the feed chain is not stable, and the rotating shaft or the supporting portion of the rotating shaft is damaged.

[0004]

The support mechanism of the feed chain according to the present invention for solving the above-mentioned problems comprises a threshing section 9
A feed chain 17 for conveying grain culms is stretched laterally in the front-rear direction, and a front sprocket 26 around which the feed chain 17 is wound is pivotally supported by a sprocket shaft 34 provided laterally on the side of the threshing part frame 16. In the case where the rear of the chain frame 24 on which the feed chain 17 is stretched is attached so as to be able to move up and down around the sprocket shaft 34, the sprocket shaft 34 is located on both left and right sides in front of the threshing part frame 16. It is characterized by being supported in position.

[0005]

[Operation] Chain frame 24 of feed chain 17
The bending moment applied to the sprocket shaft 34 by the
Chain frame 2 while receiving at two points on both left and right sides of
4, the rear of the feed chain 17 is vertically swung about a sprocket shaft 34 around which a front sprocket 26 is supported.

[0006]

EXAMPLE FIG. 1 shows a side view of a self-removing combine to which the present invention is applied. A machine body 3 is provided on a machine body frame 2 supported by the traveling device 1. In front of the machine body 3, a lift frame 4 provided at a front end of the machine body frame 2 is supported so as to be vertically swingable. A processing unit 6 is provided. At the rear of the lift frame 4, there is a handling room 7 at the top.
Is provided with a threshing section 9 in which a sorting chamber 8 is placed at the bottom. A handling cylinder 11 is axially supported in the handling chamber 7 so as to be rotatable in the front-rear direction. Further, the sorting chamber 8 is formed by being surrounded by a threshing part frame body 16 composed of a front wall 12, left and right side walls 13, 14 and the like, and a sorting mechanism including a sorting fan, a spiral shaft and the like inside. Is equipped with.

On the left side of the threshing section 9, a feed chain 17 is stretched in the front-rear direction so as to pass through the outside of the side opening of the handling chamber 7 in a structure described later. On the other hand, as shown in FIG. 2, an openable / closable handle barrel cover 18 capable of closing the upper and side openings of the handle chamber 7 is provided above the handle chamber 7. The handling cylinder 11 appears in the open state of 18. The handle barrel cover 18 is integrally provided with a guide rail 19 that faces the feed chain 17 in a state where the handle barrel cover 18 is closed. The handling body cover 18 has a structure in which the left side (right side as viewed from the front) moves up and down.

In the threshing section 9 constructed as described above, the feed chain 17 takes over the cut culm that has been cut by the pre-processing section 6 and conveyed backward, and handles the culm that has been inherited by the feed chain 17. It is transferred to the chamber 6 and the handling cylinder 11
The grain culm transported by is threshed, and the automatic sorting process for straw, cuttings, fine grains and the like is performed in the sorting chamber 7.
At this time, the feed condition of the feed chain 17 is as follows:
The head of the grain culm is held between the feed chain 17 and the guide rail 19 while the tip of the grain is conveyed so as to pass through the inside of the handling chamber 6. The configuration and operation of the threshing unit 9 are the same as those of the conventional one.

On the other hand, as shown in FIG. 3, a gear case 21 for driving the feed chain 17 is provided on the left side wall 13 of the threshing part frame 16, and the gear case 21 is provided.
A drive shaft 22 is rotatably supported and protrudes to the left. A drive pulley 23 is provided at the tip of the drive shaft 22. The driving force transmitted from the engine into the threshing unit 9 for driving the threshing unit 9 is transmitted to the gear case 21, the drive shaft 22 is rotationally driven, and the drive pulley 23 is rotated.

Next, the structure of the feed chain 17 and the mounting structure on the threshing section 9 side will be described with reference to FIGS. The feed chain 17 is the chain frame 2
Drive sprocket 26 rotatably supported by
Driven sprockets 27, 28 Idle sprockets 29
A chain 31 with a protrusion is wound around the structure. At this time, the driven sprocket 27 is positioned behind the drive sprocket 26 and the driven sprocket 28 is positioned in front of the drive sprocket 26, respectively, to position the feed chain 17 in the front-rear direction. The idle sprocket 29 is located above the drive sprocket 26 and applies a certain amount of tension to the chain 31 with protrusions. A driven pulley 32 is integrally fixed to the back surface of the drive sprocket 26, and the driven pulley 32 and the drive sprocket 26 rotate integrally.

On the other hand, the left and right side walls 13, 14 of the threshing part frame 16
A sprocket shaft case 33 having a hollow cylindrical shape is fixed to the front surface of the sprocket shaft case 33 in the left-right direction via a fixture 35.
4 has been inserted. At this time, the left end portion of the sprocket shaft 34 projects from the sprocket shaft case 33.
Since the sprocket shaft case 34 functions as a stay in the left and right direction of the threshing part frame 16,
Has higher rigidity than before. For this reason, the support of the threshing selection mechanism in the threshing unit 9 is stable, and stable threshing work with less influence of vibration during traveling can be performed.

The driven pulley 32 is rotatably supported at the protruding left end portion of the sprocket shaft 34, whereby the feed chain 17 is rotatably supported by the sprocket shaft 34 with the front as a fulcrum. It The sprocket shaft 34 and the drive shaft 22 are located at substantially the same height from the ground. The driven pulley 32 and the drive pulley 23 are connected by a chain 36 or other interlocking means. At this time, a frame 37 for tensioning the chain is provided between the driven pulley 32 side and the drive pulley 23 side, and the chain 36 is adjusted so as to maintain a certain tension.

With the above structure, the feed chain 17 is
The drive force transmitted to the drive pulley 23 as described above is transmitted to the driven pulley 32 via the chain 36, and the driven pulley 32 rotates, whereby the drive sprocket 26
Is rotated, and each of the sprockets 26, 27, 28, 2 is rotated.
The chain 31 with the protrusions, which is wound around 9, rotates to convey the grain culms as described above.

Next, a method of opening the handling chamber 7 above and laterally will be described. First, the handle cover 18 is rotated upward. At this time, the guide rail 19 provided on the handle barrel cover 18 also rotates upward together with the handle barrel cover 18, so that the guide rail 19 is separated from the feed chain 17 to the upper right side of the feed chain 17. Then, in this state, the feed chain 17 is integrally formed with the chain frame 24, and the rear end (the driven sprocket 27 side) is rotated upward about the sprocket shaft 34 to open the side of the threshing unit 9. Then, maintenance of the threshing section 9 is performed from the opened portion of the handling room 7.

At this time, the load of the feed chain 17 is applied to the left end of the sprocket shaft 34, and a moment is generated to bend the sprocket shaft 34 downward. In this case, since the sprocket shaft 34 is inserted into the sprocket shaft case 33 that is fixed to the left and right side walls 13 and 14 of the threshing part frame body 16 via the fixing tool 35, the bending moment is the same as that of the left and right fixing tools 35. Two points share and receive. Therefore, even when the force applied to the sprocket shaft 34 increases and the bending moment increases when the feed chain 17 is rotated as described above, the bending moment can be stably received and the fixed No excessive force is applied to the tool 35. That is, the feed chain 17 can be rotated upward in a stable state, and the fixture 35, the left and right sidewalls 13 of the threshing part frame 16,
There is no deformation or damage to the mounting portion of the fixture 35 of 14, the sprocket shaft case 33, and the sprocket shaft 34.

[0016]

According to the present invention configured as described above, since the fulcrum shaft of the feed chain is supported in a two-point supported state on both left and right sides of the threshing part frame, the feed chain is stably supported. There is an effect that the can be rotated upward. Further, since the fulcrum shaft functions as a stay in the left-right direction of the threshing part frame, there is also an effect of increasing the rigidity of the whole threshing part frame.

[Brief description of drawings]

FIG. 1 is an overall side view showing a feed chain mounting structure in a combine.

FIG. 2 is an enlarged front view of a main part of a threshing unit.

FIG. 3 is an enlarged front view of an essential part showing the attachment structure of the feed chain.

FIG. 4 is an enlarged side view of an essential part showing the attachment structure of the feed chain.

FIG. 5 is a side view showing the rotation operation of the feed chain.

[Explanation of symbols]

 9 Threshing part 17 Feed chain 26 Sprocket 16 Threshing part frame 34 Sprocket shaft 24 Chain frame

Claims (1)

[Claims] 1. A front sprocket (26) around which a feed chain (17) for conveying grain culms is stretched in the front-rear direction on the side of the threshing section (9) and the feed chain (17) is wound.
Of the sprocket shaft (3
4) and the above feed chain (1
7) in which the rear of the chain frame (24) which is stretched is attached so as to be able to move up and down around the sprocket shaft (34), and the sprocket shaft (34) is used for the threshing part frame (16) Support mechanism for the feed chain that is supported at the front left and right sides.