JPH0253Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a drive mechanism for a grain lifting conveyor in a threshing machine.

Normally, in agricultural machinery that handles grain, such as a threshing machine, grain lifting machines comprising a spiral conveyor are often used to lift unhulled rice and the like to a hopper or a storage tank in order to pack them into bags. Especially in threshing machines,
In order to lift and transfer the first paddy grains to the rear of the threshing machine, it has a drive structure that is approximately perpendicular to the operating shaft of the first conveyor, etc., which is horizontally suspended on the machine frame. Therefore, to drive a grain lifting machine, the drive direction is changed from an operating shaft horizontally suspended on the machine frame through bevel gears, chains, etc.

However, the above-mentioned drive method has drawbacks such as the transmission mechanism requires time and effort to assemble, adjust, etc., is inferior in durability, and cannot be easily repaired.
Further, the driving shaft, which is a driving source, and the grain lifting machine have a close relationship with each other. In other words, if the grain lifting machine is overloaded and the drive is disturbed, the effect will also be felt on the operating shaft, causing trouble in the operation of the operating shaft system other than the grain lifting machine.

The present invention was developed in view of the above circumstances, and the transmission path between the operating shaft and the grain lifting machine is formed by a plurality of pulleys and one endless transmission band, thereby solving the above drawbacks and being economical. The object of the present invention is to provide a drive mechanism that is advantageous in terms of performance.

The present invention will be described below based on the illustrated embodiments. FIG. 1 is a schematic front view of a thresher having a traveling device, and FIG. 2 is an enlarged perspective view of the main parts. In the figure, 1 is a machine frame, and 2 is a traveling device consisting of crawlers, etc., to which input from the power section 6 is made. 3 represents a threshing machine consisting of a threshing machine, a handling cylinder 4, a threshing feed chain 5, and a sorting device (not shown), and the fine grains after sorting are collected on the first conveyor 8 that is horizontally hung on the machine frame 1. Then, the fine grains are transferred to the side of the machine frame 1, passed through the grain lifting machine 7, and stored in paddy bags or the like. Here, from below the transfer end of the first conveyor 8 suspended horizontally on the machine frame 1,
In the grain lifting machine 8, which is installed approximately perpendicularly to the first conveyor 8 and extends diagonally upward to take out the grains out of the machine, the first conveyor 8 is substantially parallel to the machine frame 1. A drive pulley 1 is attached to a part of the shaft end of the operating shaft 9 that is suspended.
A guide tension pulley 11 is fitted on the shaft end of the operating shaft 9 approximately parallel to the drive pulley 10.
A driven pulley 12 is fitted into the lower shaft end of the grain lifting conveyor 7a built in the grain lifting machine 7, and a floating tension pulley 13 is opposed to the driven pulley 12 with the operating shaft 9 interposed therebetween. Attached to the pulley mounting bracket 17, the tension spring 1
6 and the tension fitting 18 to tighten it. An endless transmission belt 15 made of a single V-belt or the like is suspended between the pulleys 10, 11, 12, and 13. At this time, the pulley 10 and the pulley 1
2. The distance between the pulleys 12 and 11, the pulley 11 and 13, and the pulley 13 and 10 is 4.
It's a 1/2 twist.

Since the present invention is constructed as described above, when each part is operated, the drive pulley 10 rotates depending on the rotation of the operating shaft 9, and the V
The rotation of the pulley 10 is transmitted to the passive pulley 12 via an endless transmission band 15 made of a belt or the like, and the passive pulley 12 rotates to transfer the grain to the grain frying conveyor
The grains first transferred from the conveyor 8 to the connecting part 14 by operation of "a" are lifted up in the grain lifting machine 7. Here, the rotation of the driven pulley 12 is performed by the tension of the endless transmission band 15 caused by the guide tension pulley 11 and the floating tension pulley 13.

The tension pulley 13 slides and tensions the pulley mounting fitting 17 along the tension fitting 18 by the restoring force of the tension spring 16, and as a result, the pulley 13 is tensioned.

As described above, according to the present invention, the drive pulley 10 is fitted to a part of the shaft end of the operating shaft 9 horizontally suspended on the machine frame 1, and the guide tension pulley 11 is loosely fitted approximately parallel to the drive pulley 10. A passive pulley 12 is fitted to the lower shaft end of the grain frying conveyor 7a, and a floating tension pulley 13 is provided which faces the pulley 12 with the operating shaft 9 in between.
Since one transmission endless belt 15 is suspended between 12, 11, and 13, the transmission mechanism of the orthogonal shaft can be installed in a position without any difficulty and narrowness, and the tension spring 16
In addition, in an overload condition where the load on the grain frying conveyor 7a is greater than the frictional force of the endless belt 15, the belt slips due to the idle rotation of the spring 16 and the endless belt 15, and the operating shaft 9
It plays the role of a check valve that does not impede the rotation of the valve.

Thus, the drive mechanism of the present invention not only reduces manufacturing costs, but also has a simple structure, is convenient for repairs, has excellent durability, and is economically advantageous. It is something to play.

In this embodiment, the guide tension pulley 11
is loosely fitted to the shaft end of the actuating shaft 9, but it is needless to say that this is not limited to this embodiment.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a schematic front view of a thresher having a traveling device, and FIG. 2 is an enlarged perspective view of the main parts. In the figure, 1... machine frame, 2... traveling device, 3... thresher, 4... handling drum, 5... threshing feed chain, 6... power section, 7... grain lifting machine, 7a... ...Grain frying conveyor, 8...Ichiban conveyor, 9...Operating shaft,
10... Drive pulley, 11... Guide tension pulley, 12... Passive pulley, 13... Idle tension pulley, 14... Connection portion, 15...
Transmission endless band, 16...Tension spring, 1
7...Pulley mounting bracket, 18...Tension bracket.

Claims (1)

[Scope of utility model registration request] In the grain lifting machine 7, which is installed from below the transfer end of the first conveyor 8 horizontally suspended on the machine frame 1, extending obliquely upward and substantially perpendicular to the first conveyor 8, to take out the grains out of the machine. Then, a drive pulley 10 is fitted to a part of the shaft end of the operating shaft 9 which is horizontally suspended in the machine frame 1 substantially parallel to the conveyor 8, and a guide tension pulley 11 is loosely fitted. A passive pulley 1 is attached to the lower shaft end of the grain frying conveyor 7a built in the grain machine 7.
A floating tension pulley 13 is provided which faces the driven pulley 12 with the operating shaft 9 interposed therebetween, and one endless transmission band 15 is suspended between the pulleys. The drive mechanism of the grain lifting conveyor in a threshing machine.