JPH032103Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Field of industrial application The present invention relates to a discharge pipe rotating device in a grain tank for discharging grains from the grain tank.

(b) Prior art Conventionally, whether the discharge pipe rotating device for a grain tank is a gear drive system or a chain drive system, when the discharge pipe collides with a tree or a transport vehicle, the transmission mechanism is damaged by the impact, so this is prevented. It was equipped with a safety device to do so.

(c) Problems to be solved by the invention If a torque limiter is used as the safety device for the discharge pipe rotating device in the known grain tank, the structure will be complicated, the weight will be large, and the cost will be high.
In addition, if a shear pin is used, it is troublesome to restore it if it breaks.

(d) Means for solving the problem The present invention provides a discharging tube at the top of a lifting tube so that it can be rotated via a rotating outer tube, and a plurality of protrusions arranged at loose intervals on the outer circumference of the outer tube. By providing a protrusion and further extending a chain between the row of protrusions and the drive sprocket, the chain will jump over the protrusion when an impact is applied to the discharge pipe, thereby preventing damage to the transmission device and eliminating the impact. The above-mentioned problem has been solved by allowing the operator to immediately continue working.

(e) Action When loading the grains in the grain tank onto the platform of a transport vehicle, move the machine to the place where the transport vehicle is parked, and
The grains are loaded onto the loading platform by raising the discharge tube and rotating it so that the discharge port faces onto the loading platform.

At this time, when the drive sprocket is rotated, the chain rotates while being engaged with a protrusion protruding from the outer circumferential surface of the discharge pipe, so that the discharge pipe turns in either left or right direction.

Then, when the discharge tube is rotated as described above,
When the discharge tube collides with an obstacle, the chain jumps over the protrusion and spins idly, so the transmission mechanism is not damaged.

Furthermore, when the obstacle is removed, the chain is engaged with the protrusion and transmits power, allowing the discharge pipe to rotate.

(f) Example An example of the present invention will be explained with reference to the drawings.
This combine is equipped with a threshing device b and a grain tank c on a machine base having a traveling device a, a pretreatment device d is installed in the front of the threshing device b, and an operation panel e is installed in the front of the grain tank c. A cockpit f is provided, and an engine g is installed at the rear.
A lifting tube 1 is installed upright on a cylinder that projects outward from the bottom of the grain tank c with a lateral transfer spiral installed inside, and a lateral transfer tube 1 is installed inside the lifting tube 1. A lifting spiral 2 that interlocks with the spiral is installed inside, a cylinder 3 is attached to the upper part of the lifting cylinder 1 with bolts 3a, and an outer cylinder 5 is rotatably fitted on the outer periphery of the cylinder 3 via a bush 4. A discharge tube 7 is connected to the upper portion of the discharge tube 7, which is moved up and down by a hydraulic cylinder 6b about a horizontal axis 6a, and has an ejection spiral inside.

The lower part of the outer cylinder 5 is formed into a large diameter part 8 which becomes the bottom of the teeth of the sprocket, and a plurality of screw holes 9 formed on the outer periphery of the outer cylinder 5 are provided with tapered pins 10 as shown in FIG. A motor 12 is attached to the lower part of a transmission case 11 provided in the vicinity thereof, and a small diameter gear 13 of a shaft that interlocks with the motor 12 is connected to a large diameter gear 15 of a counter shaft 14. As shown in FIG. 1, a chain 17 is stretched between the drive sprocket 16 which is meshed with the drive sprocket 16 and spline-fitted to the lower part of the drive sprocket 16, and the pins 10 on the outer periphery of the outer cylinder 5.

Further, one end of a V-shaped chain tension 20, 20 made of spring steel is pivotally supported on support pins 18, 18 provided on both sides of the portion of the chain 17 extending from the large diameter portion 8 toward the drive sprocket 16. The other end is connected by a coil spring 21 so that it can expand and contract.

Furthermore, the lower part of the large diameter part 8 has an even larger diameter, and a part thereof has a recess 8a (shown by a dotted line in FIG. 1).
The L-shaped arm 22 is pivotally supported at a portion corresponding to the recess 8a, and one side of the L-shaped arm 22 pivotally supports a roller 23 that comes into contact with the recess 8a, and the other side is connected to a wire 24. A hook 25 connected to the other end engages in a disengaged state with a receiving rod 28 of a clutch lever 27 that connects and disconnects the tension clutch 26 of the lateral transfer spiral.

In the above-mentioned device, when the grain tank is full, the machine is brought close to the place where the transport vehicle is parked, the discharge tube 7 is tilted upward by the hydraulic cylinder 6b, and the motor 12 is started. rotates at a reduced speed via the small-diameter gear 13, large-diameter gear 15, chain 17, and pin 10, and accordingly, the discharge tube 7 rotates, and its discharge port faces onto the loading platform of the carrier vehicle. At this time, the motor 12 is stopped and the grains are lifted and discharged.

When storing the discharge tube 7 at a predetermined position on the threshing device, the motor 12 is reversely rotated to return the discharge tube 7 and rotate it downward by the hydraulic cylinder 6b.

If the discharge pipe 7 collides with an obstacle while rotating the discharge pipe 7, the chain 17
are arranged at sparse intervals, and only a small number of pins 10 (2 to 3 in this example) are engaged with the chain 17, so the chain 17 will jump over the pins 10, causing damage to the transmission mechanism. An unreasonable load is not applied, and by forming the pin 10 in a tapered shape as described above, the flying action of the chain 17 is improved.

Further, when the drive sprocket 16 is rotated clockwise in FIG. 1, the right side of the chain 17 is tensioned as shown by the solid line.

At that time, conventionally, as shown in Fig. 6, the tip was in contact with the fixed member, so the tension of the chain was almost linear, and the chain was pushed very strongly to stretch and wear out quickly, but in this embodiment, Qian Zhang 20,20
Since a coil spring 21 is tensioned at the tip of the chain, both of them tilt to the right as shown by the solid line in Fig. 1, so the chain 17 is tensioned with the appropriate pushing force set, and the motor 12 is reversed. When rotated,
The chain tensioners 20, 20 are tilted to the left as shown by the two-dot chain line, and the chain tensioners 20, 20 and chain 17 are prevented from elongation and abnormal wear of the chain tensioners 20, 20 and the chain 17 while ensuring a reasonable transmission regardless of the direction of rotation. It can be prevented.

Furthermore, as described above, when the discharge pipe 7 collides with an obstacle and a large impact load is applied to the chain 17, the coil spring 21 expands, so that the chain jumping action is performed more reliably. I can do it.

(g) Effects of the invention As mentioned above, the invention provides the discharge tube 7 at the top of the lifting tube 1 so as to be rotatable via the rotatable outer tube 5.
A plurality of protrusions are provided on the outer periphery of the outer cylinder 5 at sparse intervals,
Since the chain 17 is stretched between these rows of protrusions and the drive sprocket 16, when the discharge tube 7 collides with an obstacle such as a transport vehicle and an impact overload is applied to the chain 17, the chain 17 will be able to release a small number of pins. This eliminates the need for expensive torque limiters, shear pins, etc. that are troublesome to replace, and allows for immediate turning once the obstacle is cleared.

Furthermore, compared to sprocket processing, both hole processing and pin processing can be provided easily and inexpensively, and the structure can be simple and compact.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention,
Fig. 1 is a plan view of the main parts, Fig. 2 is a side view showing a partial cross section, Fig. 3 is a perspective view of the pin, Fig. 4 is a plan view of the combine harvester, and Fig. 5 shows the grain loading state. FIG. 6 is a plan view of the conventional example. 1... Lifting tube, 5... Outer tube, 7... Discharge tube, 8
...Large diameter part, 16... Drive sprocket, 17...
...Chien.

Claims (1)

[Scope of utility model registration request] The rotating outer cylinder 5 is placed with the discharge cylinder 7 on top of the lifting cylinder 1.
A grain tank is provided so as to be rotatable through the outer cylinder 5, a plurality of protrusions are protruded from the outer periphery of the outer cylinder 5 at sparse intervals, and a chain 17 is stretched between the row of these protrusions and a drive sprocket 16. Discharge pipe rotating device.