JPH10210844A - Straw winding prevention drum attaching structure for rotary shaft - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a titled structure capable of dispensing with an expensive rolling bearing and a drum holder, simplifying an assembling structure, quickening assembly and improving workability by attaching a divided drum 5 to a divided bearing. SOLUTION: In this attaching structure of the straw winding prevention drum 16 of a rotary shaft 4A for freely relatively rotationally attaching the straw winding prevention drum 16 to the rotary shaft 4A through a pair of left and right bearings 17, the bearing 17 is constituted of a collar, the bearing 17 and the straw winding prevention drum 16 are respectively divided in a peripheral direction and the divided drum 16A is attached to the divided bearing 17A. Also, it is preferable to attach the divided drum 16A to the divided bearing 17A while making the phase of the divided end face of the divided drum 16A different from the divided end face of the divided bearing 17A, make the bearing 17 by resin and bring the outer end face into contact with the side face of a sprocket mounted to the rotary shaft 4A.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile agricultural machine such as a combine harvester or a rush harvester, and more particularly to a technique for preventing a straw from being wound around a driving rotary shaft such as a feed conveyor.

[0002]

2. Description of the Related Art An example of a structure for preventing a straw from being wound around a drive rotating shaft of a feed conveyor in an all-culm-in type combiner will be described. As shown in FIG. Rotary axis 4
A, a sprocket 14 for driving a feed conveyor is mounted rotatably integrally via a key 15 on a key A, and a drum holder H is attached to a boss portion 14A of the driving sprocket 14 via a bearing B so as to be relatively rotatable. A straw-wrap preventing drum D having a large diameter is externally fitted to H, and the straw-wrap preventing drum D is supported so as to be rotatable relative to the driving rotary shaft 4A.

[0003]

The use of the expensive bearing B for the straw winding prevention drum D to which almost no load acts, and the fact that the straw winding prevention drum D cannot be directly mounted on the bearing B, the drum is not used. A holder H must be used, and a dustproof cover C for protecting the bearing B from dust such as straw chips is required. Further, from one end of the driving rotary shaft 4A, the bearing B, the drum holder H, the straw The winding prevention drum D must be assembled, and assembling and disassembly are troublesome as a whole.
In addition, there is a disadvantage that the number of parts increases, the weight increases and the cost increases, and there is room for improvement.

SUMMARY OF THE INVENTION An object of the present invention is to devise a support structure for a straw winding prevention drum to facilitate assembly and simplify the structure.

[0005]

According to the first aspect of the present invention, a straw winding prevention drum mounting structure for rotatably mounting a straw winding prevention drum on a rotary shaft via a pair of left and right bearings. The bearing is made of a collar, and the bearing and the straw winding prevention drum are each divided in the circumferential direction, and the divided drum is attached to the divided bearing. [Function] According to this configuration, the bearing can be divided in the circumferential direction by the collar, and the divided bearing and the divided straw winding prevention drum can move the bearing and the straw winding prevention drum with respect to the rotating shaft without removing the rotating shaft. And can be assembled from the radial direction. In addition, it is possible to eliminate the need for expensive rolling bearings and drum holders. [Effect] According to the first aspect of the present invention, the collar having the function of the bearing and the function of the holder for supporting the straw winding prevention drum so as to be rotatable relative to the rotating shaft is simplified, and the cost is reduced. In addition, the bearing and the straw winding prevention drum can be easily assembled to the rotating shaft by the bearing divided in the circumferential direction and the straw winding prevention drum.

According to a second aspect of the present invention, the divided drum is attached to the divided bearing such that the divided end faces of the divided drum are different in phase from the divided end faces of the divided bearing. [Operation] According to this configuration, it is possible to operate in the same manner as in the first aspect of the invention, and to embrace the split bearing with the split drum and attach it to the rotary shaft. [Effect] According to the second aspect of the present invention, the above-described effect of the first aspect of the present invention can be obtained, and the divided bearing can be hung on the divided drum and attached to the rotary shaft. For example, as shown in FIG. The split end faces of the split drum and the split end faces of the split bearings are set to the same phase, and the split bearings and the split drums are separately mounted on the rotating shaft. No means is required, and the assembly structure can be simplified and the assembly can be speeded up.

According to a third aspect of the present invention, the bearing is made of resin, and an outer end surface thereof is brought into contact with a side surface of a sprocket mounted on a rotating shaft. [Operation] According to this structure, the operation is the same as that of the invention according to claim 1, and the outer end surface of the bearing is brought into contact with the side surface of the sprocket mounted on the rotating shaft. Since the structure can be achieved, and the bearing made of resin is used, the friction with the metal sprocket can be reduced to suppress the corotation with the sprocket, and the function of preventing winding of the straw can be enhanced. [Effect] According to the third aspect of the present invention, the above-mentioned effects of the first aspect of the present invention are provided, and a dust-proof structure for the bearing can be achieved by using the bearing itself. There is no need to provide them, and the structure can be simplified and the cost can be reduced.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to a structure for preventing a straw from being wound around a driving rotary shaft of a feed conveyor in a whole-culm-in type combine.

FIG. 1 shows an overall side view of a combine. A scraping reel 1 for scraping a grain culm, a clipper-type cutter 2 for cutting a root part of the grain culm, and a cutting grain culm are provided at the front of the fuselage. An auger 3 for gathering in the center of the right and left of the body, a pre-cutting device 5 equipped with a feed conveyor 4 for lifting and transporting the gathered culms, and a body frame 7 having a pair of right and left crawler traveling devices 6 and 6 At the top, the feed conveyor 4
Threshing device 8 for threshing the grain stalks conveyed by
And a driving cabin 9, so that the pre-cutting device 5 at the front of the machine body can be moved up and down through a hydraulic cylinder 10 with a drive shaft 4 </ b> A of the feed conveyor 4 as a fulcrum.

As shown in FIGS. 2 and 3, the feed conveyor 4 comprises a bar conveyor having a pair of left and right chains 11 and 11 on which a bar 12 is erected, and a threshing device is provided at one end of a driving rotary shaft 4A. 8 is provided with an input pulley 13 to which power is transmitted via a belt transmission. A drive sprocket 14 for driving a bar conveyor is mounted on the drive rotary shaft 4A via a key 15 so as to be rotatable integrally therewith. A drive shaft portion between the drive sprocket 14 and the other drive sprocket 14 A large-diameter straw winding prevention drum 16 for preventing the straw from winding around the shaft portion is rotatably mounted via a bearing 17 made of a synthetic resin collar.

The straw winding prevention drum 16 and the bearing 17 are divided into two parts in the circumferential direction.
A, 16A and split collars 17A, 17A are respectively
It is configured so that it can be mounted on the drive rotary shaft 4A from the radial direction.

The split collars 17A, 17A have axially concave portions 17C, 17C at the center of the outer surface, respectively.
The boss portion 14A of the drive sprocket 14 is inserted into the recessed portion 17C, 17C, and the split collar 17A, 17
The outer side surface of the drive sprocket 14 in the radial direction is in contact with the inner side surface of the drive sprocket 14, and further, the inner end surface of the boss 14A of the drive sprocket 14 and the recessed portions 1 of the split collars 17A, 17A.
7C and 17C end faces are brought into contact with each other and drive sprocket 1
It is configured such that dust such as straw chips does not enter through a gap between the bearing 4 and the bearing 17.

The straw winding prevention drum 16 is made of sheet metal and formed in a curved shape by a press. The divided end faces 16B, 16B of the divided drums 16A, 16A are separated from the divided end faces 17B, 17B of the divided collars 17A, 17A. The drums 16A and 16A are attached to the divided collars 17A and 17A via bolts 18 and 18 while being overlapped in the circumferential direction.

[Alternative Embodiment] In the above embodiment, the structure for preventing the straw from being wound around the drive rotating shaft of the feed conveyor has been described. The present invention can also be applied to a structure for preventing a straw from winding around a rotating shaft or a structure for preventing a straw from winding around a rotating shaft of a straw transporting device in a rush harvester.

As shown in FIGS. 5 and 6, a resin bearing 1 is provided.
7 may be constituted by a cylindrical collar that contacts only the end face of the boss portion 14A of the drive sprocket 14.

Further, as shown in FIG.
A, split end faces 16B, 16B of 16A and split bearing 17
A and 17A are set in phase with split end faces 17B and 17B, and the split bearings 17A and 17A are
9 and 19, the split bearing 17
The split drums 16A, 16A may be individually connected to A, 17A via bolts 20. (Note that components having the same functions as those of the above-described embodiment are denoted by the same reference numerals and symbols as those of the embodiment.)

[Brief description of the drawings]

FIG. 1 is an overall side view of a combine.

FIG. 2 is a schematic diagram showing a transmission system to a feed conveyor.

FIG. 3 is a longitudinal sectional front view showing a part of a feed conveyor.

FIG. 4 is a longitudinal sectional side view of the same.

FIG. 5 is a longitudinal sectional front view showing a part of the second embodiment;

FIG. 6 is a longitudinal sectional side view of the same.

FIG. 7 is a longitudinal sectional side view of a third embodiment.

FIG. 8 is a longitudinal sectional front view showing a part of a conventional structure.

[Explanation of symbols]

 4A Rotating shaft 14 Sprocket 16 Straw winding prevention drum 16A Split drum 17 Bearing 17A Split bearing

Claims (3)

[Claims] A structure for mounting a straw winding prevention drum on a rotating shaft via a pair of left and right bearings so as to be rotatable relative to each other. A bearing and a straw-winding prevention drum mounting structure of a rotating shaft, wherein the bearing and the straw-winding prevention drum are each divided in the circumferential direction, and the divided drum is mounted on the split bearing. 2. The rotary drum according to claim 1, wherein the split drum is attached to the split bearing such that the split end faces of the split drum are different in phase from the split end faces of the split bearing. Construction. 3. The mounting structure according to claim 1, wherein the bearing is made of resin, and an outer end surface of the bearing is in contact with a side surface of a sprocket mounted on the rotating shaft. .