JPS6218184Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a device for preventing lateral vibration of the reaping section of a combine harvester, which prevents the lateral vibration of the reaping section when the reaping section is raised and lowered.

Conventionally, as shown in Japanese Utility Model Application Publication No. 55-27078, there has been a technique in which a link rod is provided to connect the reaping section to the driver's cab, and the link rod prevents the reaping section from swinging laterally.

However, in the above-mentioned conventional technology, since the attachment position of the link rod is apart from the rotational fulcrum axis of the reaping section, the installation length of the link rod and the vertical range of the reaping section are mutually restricted, and the reaping section Since the link rod was bent in conjunction with the lifting and lowering of the link rod, there were problems such as the fact that the reinforcing structure and the bearing structure of the connecting portion could not be easily simplified.

However, the present invention provides a device for raising and lowering a reaping section around a rotating fulcrum shaft, in which a guide roller is provided in the reaping section, and a guide plate is provided inside the driver's platform to support the guide roller between the outside surface and the guide roller. is fixedly installed, and the inscribed surface of the guide plate that guides the guide roller is formed in an arc shape centered on the rotation fulcrum shaft.

Therefore, the guide plate can be easily attached according to the position of the rotation fulcrum shaft and the range of elevation of the reaping section, and a structure for preventing lateral vibration can be easily obtained without interfering with the elevating function of the reaping section. By eliminating the need for connecting parts such as link rods, the structure for preventing lateral vibration can be easily simplified, and compared to conventional methods, manufacturing costs can be reduced and handling operability such as assembly and disassembly can be easily improved. be.

Hereinafter, one embodiment of the present invention will be described in detail based on the drawings. Figure 1 is a schematic side view of the combine harvester, Figure 2 is a plan view of the same, and in the figure 1 is a truck frame;
2 is a traveling crawler installed on the left and right sides of the truck frame 1; 3 is a machine base fixedly supported on the truck frame 1; 4 is a threshing section with a feed chain 5 installed on the left side and a handling barrel 6 built therein; 7 is a threshing section A reaping section is provided in front of the threshing section 4 and is rotated up and down by a hydraulic cylinder 9 around a rotation fulcrum shaft 8 at the front end of the reaping section, and 10 is a cylinder type straw that is fixed on the rear surface of the threshing section 4. Cutter, 11 is the cutter 1
0, a straw collecting table 12 is connected to the end of the feed chain 5 and selectively feeds straw to the cutter 10 or the collecting table 11; 13 is the rear right side of the threshing section 4; 15 is the paddy holder 13 facing the grain lifting cylinder 14 provided in the
16 is a driver's seat provided on the top surface of the engine portion 15; 17 is a driver's cab; 18 is a driving operation section in which side clutch levers 19, 19, etc. are mounted on the top surface of the operating column 20. .

The reaping section 7 includes a main reaping frame 21 whose base end is attached to the rotation fulcrum shaft 8 and whose intermediate end is connected to the hydraulic cylinder 9;
Grass dividing board 22 attached via a, grain culm lifting devices 23, 23, and left and right raking drums 24, 2
4, a lower conveyance chain 25 arranged in parallel below the left raking drum 24, a cutting blade 26 that reciprocates via a crank mechanism 26a, and a vertical conveyance chain 27, which enters between the grass dividing plates 22... The tip of the uncut grain culm is held by the pulling devices 23, 23, and the culm base is held between the drums 24, 24 and the chain 25, and the culm is cut by the cutting blade 26, and the culm is harvested. The structure is such that the grain culm is held and conveyed to the threshing section 4 by a vertical conveyance chain 27.

As shown in FIGS. 3 and 4, there is an elevation between the reaping frame 21a of the reaping section 7 and a side column 28 provided on the left side of the driver's seat 16 adjacent to the reaping frame 21a to prevent the reaping section 7 from swinging laterally. A guide 29 is arranged.

The lifting guide 29 includes a guide roller 32 attached to the right side of the reaping frame 21a via a support arm 30 and a shaft 31, and a left side surface of the side column 28 that guides the guide roller 32 inwardly when the reaping section 7 is raised or lowered. The guide plate 33 is provided in the reaping section 7, and is configured to prevent lateral vibration of the reaping section 7 that occurs when the reaping section 7 is raised and lowered.

The guide plate 33 has an inscribed surface 33a that guides the guide roller 32 in an arc shape centered on the rotation fulcrum shaft 8, and is inscribed in the ascending and descending locus of the guide roller 32 when the reaping section 9 ascends and descends. The guide roller 33a is attached to the side column 28 so that the surface 33a is aligned with the guide roller 33a, and is configured to move and guide the guide roller 33a between the inscribed surface 33a and the left side surface of the column 28.

In addition to supporting the proximal end of the reaping frame 21 and the lifting drive shaft 34 on the machine body side, the reaping section 7 also lifts and lowers the right side of the reaping frame 21a, which is relatively distal side of the reaping section 7. Since the guide 29 is used to guide the mower toward the machine body side, it is not possible to prevent the reaping section 7 from swinging sideways during the vertical movement, but as a result, a stable force in a fixed direction is always applied to the reaping support section. , strength can be improved, and the performance of the lifting hydraulic cylinder 9 can be reduced in size, for example. Furthermore, it is possible to effectively eliminate the lateral vibration of the reaping section 7 due to the impact force generated at the reciprocating turning point when the reciprocating type cutting blade 26 is driven.In this case, the roller 32 may be an elastic roller. Therefore, the effect can be further improved.

As is clear from the above embodiments, the present invention provides a device for raising and lowering the reaping section 7 around the pivot shaft 8, in which the reaping section 7 is provided with a guide roller 32, and the outer surface of the driver's cab 17 is provided inside the machine. A guide plate 33 that supports the guide roller 32 is fixedly installed between the guide roller 32 and the inscribed surface 33a of the guide plate 33 that guides the guide roller 32 is formed into an arc shape centered on the rotation fulcrum shaft 8. The rotation fulcrum shaft 8
The guide plate 33 can be easily attached according to the position of the reaping section and the range of elevation of the reaping section 7, and a structure for preventing lateral vibration can be easily obtained without interfering with the elevating function of the reaping section 7. By eliminating the need for connecting parts such as link rods, the structure to prevent lateral vibration can be easily simplified, and compared to conventional systems, manufacturing costs can be reduced and handling operations such as assembly and disassembly can be easily improved. It has practical effects such as:

[Brief explanation of the drawing]

FIG. 1 is an overall side view of the combine harvester, FIG. 2 is a plan view thereof, FIG. 3 is an enlarged side view of the main parts, and FIG. 4 is an explanatory plan view thereof. 7... Reaping section, 29... Lifting guide.

Claims (1)

[Scope of utility model registration request] In a device for raising and lowering a reaping section 7 around a rotation fulcrum shaft 8, a guide roller 32 is provided in the reaping section 7, and a guide plate that supports the guide roller 32 between the inside of the driver's cab 17 and the outer surface thereof. 33
A device for preventing lateral vibration of a reaping section of a combine harvester, characterized in that an inscribed surface 33a of a guide plate 33 that guides the guide roller 32 is formed in an arc shape centered on the rotation fulcrum shaft 8.