JPS5847331Y2 - Transmission wheel holding device in diagonal transmission - Google Patents

Description

[Detailed description of the invention] When a transmission wheel such as a sprocket or a pulley is directly fitted around the transmission shaft in an oblique manner via a universal joint, and the transmission band is stretched diagonally to the transmission shaft, the transmission Transmission was achieved by pressing the transmission wheel around which the other end of the band was wrapped, such as a spring, in the direction in which the transmission band was tensioned.

However, since the angle of the diagonal transmission wheel attached to the transmission shaft can change freely, if the load suddenly changes, the diagonal transmission wheel tilts and rides on the transmission band, causing the transmission band to come off. There is a drawback, and the above-mentioned phenomenon is more likely to occur when rotating at high speed.

This invention can prevent tilting of the oblique rotating body not only during low-speed rotation but also during high-speed rotation, and the transmission band will not come off, ensuring accurate transmission at all times and preventing damage to the transmission band. The purpose of the present invention is to provide a transmission wheel holding device for a diagonal transmission in which a transmission wheel is fitted around a transmission shaft via a universal joint, and in which the transmission wheel is fitted around a transmission shaft via a universal joint. It is characterized in that rollers fitted to shaft rods are brought into sliding contact with both sides of the outer periphery where the transmission band such as a belt is not wrapped around, and the transmission wheels are held between these rollers. .

The present invention will be explained in more detail with reference to the embodiment shown in the drawings below. Reference numeral 1 is a threshing device mounted on one side of a machine base having a traveling device, and a reaping device 2 is installed in front of the threshing device. A culm clamping conveyor 4 is disposed between the reaping device 2 and the starting end of a feed chain 3 equipped with a pincher provided along the handling opening of the threshing device 1. A straw removal chain 7 is stretched across a drive sprocket 6 to a drive shaft 5 of a sprocket at the rear end of the machine 3 toward the middle of the width of the machine at the rear of the machine.

A cylindrical boss 8 is interposed at the portion of the drive shaft 5 where the drive sprocket 6 is attached by inserting pins 8' and 8' therethrough, and a cylindrical boss 8 is inserted in the middle of the boss 8. A ball bearing 9 is installed in the long hole 8a in the longitudinal direction including the warp axis, and the radial direction of the ball bearing 9 is aligned with the axial direction of the drive shaft 5 by means of a support shaft 10 orthogonal to the long hole 8a. A flat washer 11 is installed between the inner surface of the long hole 8a and both sides of the pole bearing 90.
11, and both ends of the support shaft 100 are fixed with C pins 13.

A ring 14 is fitted on the outer periphery of the ball bearing 9, and a drive sprocket 6 is fitted on the outer periphery of the ring 14, and a pair of fulcrum pins 16 are screwed together from a direction perpendicular to the support shaft 10. hole 14a, 1 of ring 14 by 16
4a, it is rotatably connected.

Furthermore, an idler sprocket 19, around which the end of the straw removal chain 7 is wound, is pivotally supported at the tip of a frame 18 projecting from the upper plate 17a of the culm discharge port 17 of the threshing device 1. The base is pressed by a spring 20 in a direction to apply tension to the straw removal chain 7.

It should be noted that the fulcrum pins 16, 16 can of course be replaced with spheres or other equivalent means, and if a roller is attached to the fulcrum pins 16, the rotation will be made smoother.

Alternatively, the ring 14 may be omitted and the fulcrum pin 16.16 may be linked to the outer ring portion of the ball bearing 9.

Immediately behind the drive sprocket 6 of the frame 18, there is a support plate 21 perpendicular to the length direction of the straw removal chain 7.
are integrally protruded, and the front ends of chain guides 22 and 22 are welded to both upper and lower ends thereof, and two shaft rods 23 and 23 are provided on the front side toward both rear sides of the drive sprocket 6, respectively. is protrudingly provided, and rollers 24. ... are in sliding contact with both sides of the drive sprocket 6.60, respectively.

In the above-mentioned device, when the drive shaft 5 rotates, the ring 1
4 rotates freely around the support shaft 100 together with the outer ring of the ball bearing 9, and the drive sprocket 6 swings in a range of 2θ about the fulcrum pin 16 and 16 relative to the ring 14, so the drive sprocket 6 is rotated as shown in FIG. and rotates in the inclined position shown in FIG.

At that time, roller 24. ... is drive sprocket 60
As it rotates, the shaft rod 23. Since the tilted posture of the drive sprocket 6 is maintained constant while rotating freely around ..., the straw removal chain 7 will not come off even if the load changes suddenly or the machine suddenly tilts, ensuring reliable transportation. It can be performed.

As described above, the present invention is an oblique transmission in which a transmission wheel is fitted around a transmission shaft via a universal joint, and the present invention is applied to both sides of the outer periphery of the transmission wheel where the transmission band such as a chain or belt is not wrapped around. , rollers fitted to the shaft rods are in sliding contact with each other, and the transmission wheels are held between the rollers, so that the transmission wheels are always tilted back and forth with respect to the transmission shaft, and the transmission wheels wrapped around the transmission wheels are Even though the load on the band fluctuates, when the transmission wheel is unwound, the rollers that are in sliding contact with both sides of the transmission wheel prevent the transmission wheel from tilting in either direction. can be kept constant and smooth diagonal transmission can be performed without interfering with the rotation of the transmission band.

Furthermore, since the rollers are supported by the shaft rods, the frictional resistance is small, and loss of power can be prevented, and the rolling of the rollers can prevent straw or other conveyed materials from becoming entangled.

[Brief explanation of drawings]

Fig. 1 is a plan view of the combine harvester, Fig. 2 is an exploded perspective view of the diagonal transmission, Fig. 3 is a plan view of the main parts, Fig. 4 is an enlarged plan view of the same, Fig. 5 is a perspective view, FIG. 6 is a partially cutaway plan view, and FIG. 7 is a side view of the same. 5... Drive shaft, 6... Drive sprocket, 1... Straw removal chain, 9... Ball bearing, 10... Support shaft , 23...
・Axle rod, 24...Roller.

Claims (2)

[Scope of utility model registration request] (1) In a diagonal transmission device in which a transmission wheel is fitted around a transmission shaft via a universal joint, a shaft rod is attached to both sides of the outer periphery of the transmission wheel where the transmission band such as a chain or belt is not wrapped around. 1. A transmission wheel holding device for an oblique transmission, characterized in that the transmission wheel is held between the rollers by slidingly contacting the rollers fitted in the transmission wheel. (2) A bearing is inserted into a long hole in the axial direction of the universal joint drilled in the transmission shaft, supported by a support shaft perpendicular to the axial direction, and a ring fitted to the outer ring portion of the bearing or its outer periphery. A transmission wheel holding device in a diagonal transmission according to claim 1, wherein a transmission wheel is loosely fitted into the transmission wheel, and the transmission wheels are connected at two pivot points on one diameter.