JPH0328017Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention is a bucket wheel support for bridge reclaimers used for transporting bulk materials in blending yards of steel plants, bauxite yards of alumina smelters, etc. It is related to the device.

[Prior Art] As shown in FIG. 6, a bridge reclaimer has a carriage frame 4 movably supported on a horizontally extending girder 1 via horizontal and vertical rollers 2 and 3. A bucket wheel 5, which has a bucket 6 on its circumference and a guide rail 7 attached to its inner circumferential surface and is arranged along the carriage frame 4, is connected to a support roller 8 attached to the upper part of the carriage frame 4 and a bucket wheel 5 attached to the lower part of the carriage frame 4. The attached support roller 9 is supported by the carriage frame 4 so as to be able to roll on a guide rail 7. At the top of the carriage frame 4, there is an endless chain 13 that extends triangularly around three sprockets 10, 11, and 12, and a sprocket (not shown) installed on the side of the bucket wheel 5.
By applying the triangular bottom of the chain 13 and rotating the sprocket 10 with a motor, the bucket wheel 5 is guided by the support rollers 8 and 9 through the chain 13 and rotates around the girder 1, and the gear is rotated. Transport material 15 such as ore scraped off by the harrow 14 supported by the Tsuji frame 4
are scooped up one by one with a bucket 6 and transferred to a conveyor 16 on the girder 1 for conveyance.

The support rollers 8 and 9 used in the Bridge Creamer support the bucket wheel 5 while rolling in contact with a guide rail 7 provided in a ring shape inside the bucket wheel 5. , the conventional lower support roller 9 is attached to a support bracket 1 fixedly supported by the carriage frame 4, as shown in FIGS. 7 and 8.
7, it is rotatably supported by a shaft 19 via a bearing 18, and is simply configured to contact the guide rail 7 and rotate on the guide rail 7.

[Problems to be solved by the invention] Because the conventional support roller 9 is supported by the bracket 17 via the bearing 18 and the shaft 19 as described above, there is a gap between the support roller 9 and the guide rail 7. When a gap occurs, it cannot be automatically adjusted to eliminate the gap. Therefore, when an external force is applied to the bucket 6, the bucket wheel 5 may be pushed up and the guide rail 7 and the lower support roller 9 may collide violently, and the guide rail 7 and support roller 9 receive the impact and wear abnormally. There is also the problem that such abnormal wear creates a gap between the support roller 9 and the guide rail 7, making it impossible for the bucket wheel 5 to rotate smoothly.
This causes vibration and significantly reduces the lifespan of the aircraft.

Therefore, the present invention makes it possible to automatically correct the gap between the support roller and the guide rail, and also allows the support roller and the guide rail to follow the external force with zero gap even if an external force is applied. The purpose is to prevent abnormal wear and extend the life of the aircraft.

[Means for Solving the Problems] The present invention rotatably supports a support roller that supports the bucket wheel by rolling in contact with a guide rail on the inner surface of the bucket wheel, and the support bracket is , the support bracket is assembled to a spring case fixed to a support beam supported by a carriage frame so as to be freely displaceable in the direction of the guide rail, and the support bracket is
The structure is such that it is connected to a spring that is compressed and built into the spring case.

[Function] The support bracket that supports the support roller through the bearing and shaft is always pushed toward the guide rail by the force of the spring, so even if there is a gap between the support roller and the guide rail, it will be eliminated. can. Furthermore, by selecting the characteristics of the spring described above, it can follow external forces without strongly resisting them, and abnormal wear due to impact on the support rollers and guide rails is also eliminated.

[Example] Hereinafter, an example of the present invention will be described based on the drawings.

In the bridge reclaimer having the same structure as shown in FIG. 6, the support roller 9 is attached to the carriage frame 4 as a special support system as shown in FIGS. 1 to 4, and the bucket wheel 5 is supported. do.

A spring case 21 containing a compressed spring 22 is fixed to the support beam 20 supported by the carriage frame 4 with mounting bolts 23, and fixed projecting plates 24 are provided at four locations at the bottom of the spring case 21. A long hole 25 extending in the vertical direction is provided in the swinging plate 24 which faces each other in the left-right direction. On the other hand, the support roller 9 for supporting the bucket wheel 5 by rolling on the guide rail 7 on the inner surface of the bucket wheel 5 is
A shaft 19 is rotatably supported by a bearing 18, and supported by a support bracket 17 that fixedly supports both ends of the shaft 19.
The spring 22 in the spring case 21 is fixed to the lower end via the cylinder 26, and bolts 27 are fixed to the support bracket 17 through the elongated holes 25 of each projecting plate 24 of the spring case 21, so that the support bracket 17 is attached to the spring case. It is made to be able to move up and down along a long hole 25 guided by a projecting plate 24 of 21.

Furthermore, the strength of the spring 22 is such that the support roller 9 is normally pressed against the guide rail 7 via the support bracket 17, and when an external force is applied to the bucket 6, it can easily resist up to a certain level of force. However, the spring characteristics are such that it does not easily deform beyond a certain displacement. FIG. 5 shows the spring characteristics.

Now, when attaching the support roller 9 to the carriage frame 4 as shown in Fig. 1, the spring 2
2, with the spring characteristics shown in FIG. 5, when the spring 22 is deflected by 6 mm, the support roller 9
and the guide rail 7 are set in contact with each other. At this time, the contact load is 1400Kg. The contact state between the support roller 9 and the guide rail 7 changes due to changes in the contact state between the upper support roller 9 and the guide rail 7 and external forces acting on the bucket 6, but the contact load does not change until the support roller 9 is displaced by ±6 mm. Contact with the guide rail 7 can be maintained at 2000 kg or less. Even if more abnormal external force acts on the bucket 6, the spring 22 does not displace significantly, so the gap between the guide rail 7 and the support roller 9 can be maintained at zero without damaging the aircraft body. Thereby, the rotation of the bucket wheel 5 can be maintained smoothly without giving any impact.

[Effects of the invention] As described above, since the lower support roller supporting the bucket wheel of the bridge reclaimer is brought into contact with the guide rail on the inner surface of the bucket wheel by a spring with a constant force, The gap between the lower support roller and the guide rail can be automatically maintained at zero, both against external forces on the bucket and against wear between the upper support roller and the guide rail. It is possible to rotate smoothly, prevent wear of rotating parts, and at the same time prevent shock and vibration of the aircraft, which is expected to significantly extend the life of the aircraft.

[Brief explanation of the drawing]

Fig. 1 is a diagram showing an outline of the bucket wheel support device of the present invention, Fig. 2 is an enlarged view of the part shown in Fig. 1,
Fig. 3 is a cross-sectional view of Fig. 2, Fig. 4 is a plan view from the direction of Fig. 2, Fig. 5 is a characteristic diagram of the spring, Fig. 6 is a schematic diagram of the bridge reclaimer, Fig. 7 8 is a cross-sectional view showing how to support a conventional support roller, and FIG. 8 is a side view of FIG. 7. 1 is a girder, 4 is a carriage frame, 5 is a bucket wheel, 6 is a bucket cart, 7 is a guide rail, 8 is an upper support roller, 9 is a lower support roller, 17 is a support bracket, 20 is a support beam, 21 is a spring case, 22
indicates a spring.

Claims (1)

[Scope of utility model registration request] A support roller that supports the bucket wheel by rolling in contact with a guide rail on the inner surface of the bucket wheel is rotatably supported on a support bracket.
The support bracket is assembled to a spring case fixed to a support beam supported by a carriage frame so as to be freely displaceable in the direction of the guide rail, and the support bracket is connected to a spring compressed and built into the spring case. A bucket wheel support device for a bridge reclaimer.