JPH0440738Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an improvement of a crusher for crushing, for example, mineral raw materials or waste materials.

[Prior art] An example of a conventional crusher of this type is shown in Figures 3 and 4.
To explain with reference to the drawings, a hopper 2 is provided in the upper part of the casing 1, and a drive shaft 3 is provided that penetrates the casing 1 horizontally. Inside the casing 1 on the drive shaft 3,
Disks 4, 4 are inserted. Between these disks 4 and 4, there are four hammer shafts 5 equally spaced around the circumference.
a, 5a, 5b, and 5b are stretched. The hammer shafts 5a, 5a are provided with a plurality of hammers 7a, 7a facing each other via a collar 6a, and the hammer shafts 5b, 5b are provided with a collar 6b.
A plurality of hammers 7b, 7b are provided in a staggered manner opposite to each other with the hammers 7a, 7a interposed therebetween.

With this structure, the drive shaft 3 is rotated and the material to be crushed thrown into the hopper 2 is transferred to the hammer 7.
a, 7b, and discharged from chute 8-8.

In this crusher, a side liner 9 that covers the outer periphery of the disk 4 is attached to the inside of the casing 1 in order to prevent the area around the disk 4 inside the casing 1 from being abraded by the crushed materials moving in contact with it.

[Problem to be solved by the invention] In the above-mentioned conventional crusher, when the side liner 9 is worn out and especially the shaded area A is gouged out, the hammer 7
As the gap between the crusher and the crusher becomes larger, the crushing capacity is greatly reduced, and foreign matter gets caught in the gap, causing unnecessary load on the crusher and causing failure.

Since the hammers 7a and 7b naturally wear out, they are designed so that they can be replaced if necessary, but the side liner 9 is troublesome to replace, so the hammer 7 is usually replaced.
The replacement period is about 10 times that of a and 7b, or the shaded area A is repaired by welding before then. However, the repair work also takes a long time, resulting in a reduction in operating hours.

An object of the present invention is to provide a crusher that prevents reduction in operating time due to side liner wear.

[Means for Solving the Problems] According to the present invention, the inside of the side liner that covers part of the outer periphery of the disk that is fixed to the drive shaft and supports a plurality of hammers via the hammer shaft, and that is fixed to the inside of the casing. is covered with a lap liner, the outer edge of the lap liner is formed into a chamfered surface, and the bolt holes for attaching the liner to the casing are plug welded.

[Operation] In the crusher configured as described above, the overlapping liner greatly reduces wear on the side liners. The overlap liner can be easily replaced in a short time by removing the external nut of the mounting bolt.

Further, the inclined surface alleviates the impact of falling of the crushed objects and facilitates the movement of the crushed objects.

Plug welding also prevents mounting bolts from falling off and head wear.

[Examples] Examples of the present invention will be described below with reference to the drawings.

Note that parts in FIG. 1 that correspond to those in FIG. 3 are given the same reference numerals and redundant explanation will be omitted.

1 and 2, a stacked liner 10 is attached to the inside of the side liner 9 with a plurality of (eight in the illustrated example) mounting bolts 11 and nuts 12. The overlapping liner 10 covers approximately 60% of the radial direction of the side liner 9 whose lower part is cut out at an angle of 60 degrees left and right with respect to the center line, and approximately covers approximately 60% of the outer circumference of the disk 4 exposed from the side liner 9. It is formed in an arc shape to cover the entire area. The outer edge of the overlapping liner 10 is formed into a chamfered inclined surface 10a having approximately 2/3 of the thickness. This slope 1
0a may be arcuate. Further, a recess 10b is formed to accommodate the head of the mounting bolt 11, and the bolt 11 is
The concave portion 10b that accommodates the is closed with a plug welded portion B.

Therefore, the overlap liner 10 is the side liner 9.
This prevents wear of the part near the disk 4, which is particularly prone to wear, and greatly reduces the wear of the entire side liner 9.

Further, the inclined surface 10a alleviates the impact of falling crushed objects and facilitates the downward movement of fallen objects.

Furthermore, the plug welded portion B prevents the mounting bolt 11 from falling off and prevents the bolt head from being worn out by crushed objects.

Further, the stacked liner 10 can be easily replaced with a new one in a short time by removing the nut 12.

[Effects of the invention] Since the present invention is configured as explained above, the wear of the side liner due to crushed materials is greatly reduced by using the overlapped liner that can be easily and quickly replaced.
It is possible to extend the replacement time to about three times the conventional time and improve the operating time of the crusher.

[Brief explanation of the drawing]

Fig. 1 is a side sectional view of the main parts showing an embodiment of the present invention, Fig. 2 is a front view of the side liner and overlap liner, and Figs. 3 and 4 are side sectional views showing the main parts of a conventional crusher. FIG. 2 is a diagram and an internal front view. 1...Casing, 3...Driveshaft,
4... Disc, 5a, 5b... Hammer shaft, 7a, 7b... Hammer, 9... Side liner, 10... Lap liner, 10a... Inclined surface, B
...Plug welding part.

Claims (1)

[Scope of utility model registration request] A part of the outer periphery of the disk that is fixed to the drive shaft and supports a plurality of hammers via the hammer shaft is covered, and the inside of the side liner that is fixed to the inside of the casing is covered with a stacked liner, and the outer edge of the stacked liner is chamfered. A crusher characterized in that bolt holes for attaching the liner to the casing are plug-welded.