JPS588339Y2 - Crusher - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a pulverizer that is highly safe and has good pulverization efficiency.

A typical type of crusher that has been used in the past is a so-called hammer mill, which consists of a plurality of circular disks fixed concentrically to a rotating drive shaft, and a A plurality of supporting shafts are fixed through the peripheral edge in parallel with the rotary drive shaft, and a large number of swingers are arranged in the gaps between the disks and each supporting shaft supports and supports the base end of each hammer. This is a crusher in which a crushing rotor with a flexible rotor is built into the housing.

However, in such a crusher, as shown in FIG. Because the setting is large, when a fibrous raw material C, such as wood, which has a high rebound and is difficult to crush, is introduced, the hammer 4 that collides with the raw material C rebounds due to the rebound, and the tip of the hammer... There were cases where the hammer collided with the adjacent support shaft and bent the support shaft, or the protective collar (not shown) that was tightly fitted to the support shaft was destroyed, or the tip of the hammer was chipped. .

If the spindle is bent due to the collision between the rebounding hammer and the spindle, it becomes impossible to remove the spindle when replacing the hammer, and the protective collar may be destroyed, making it impossible to replace the hammer. It is clear that if the tip is chipped, the fragments will be scattered by the large centrifugal force of the crushing rotor, causing serious problems in terms of handling and safety, such as causing unexpected injury to workers.

The present invention has been made to eliminate the above-mentioned drawbacks and further improve the grinding efficiency. The structure is configured so that the sum of the swing radius of the hammer and the shaft radius of the support shaft is smaller than the distance between the support shafts, and when the hammer collides with the space collar due to swing, the collision is received by surface contact. The present invention relates to a crusher having a recessed portion on both the front and rear sides of the hammer.

The present invention will be explained in detail below with reference to the drawings.
FIG. 1 is a schematic cross-sectional view of essential parts showing an embodiment of the crusher of the present invention, where A is a crushing rotor and B is a housing.

The illustrated housing B has an upper half formed into an opening/closing lid B1 centered around a hinge shaft 6, so that internal repair and inspection work can be easily performed.

This opening/closing lid Bl is provided with a pulverized raw material inputting lower, and a receiving blade 8 is attached to the lower side of the inputting lower.

This receiving blade 8 can be moved back and forth toward the crushing rotor A by operating an adjustment screw 9, so that the gap between the rotor A and the crusher 4 can be freely adjusted.

Further, numeral 10 is a curved screen for particle size adjustment attached over the lower half of the grinding rotor A, and this screen can be adjusted up and down by an adjustment screw (not shown).

The crusher shown in the figure is provided with only one receiving blade 8, but if necessary, an appropriate number of additional receiving blades may be arranged and fixed at appropriate locations on the inner wall surface of the housing B. Good too.

The crushing rotor A built in such a housing B is a first
~2 As shown in Figure 2, a plurality of circular disks 2 are concentrically fixed to a rotary drive shaft 1, each having a plurality of cutting blades 5 (triangular blades in the figure) on the outer peripheral surface. It is said to be circular saw-shaped discs formed continuously, and these discs 2...
- Small-diameter space collars 12 each having a ring-shaped cushioning material 11 on its inner peripheral surface are interposed concentrically in the mutual gap.

A plurality of (six in the figure) support shafts 3 are passed through the peripheral edge of the disk 2 at equal angular intervals (every 60 degrees in the figure) in parallel with the rotary drive shaft 1. and are fixed with nuts 31 at both ends.

The hammer 4... has a circular disk 2 along each of the above-mentioned support shafts 3... to prevent collisions between the hammers.
...They are placed in a row in the gap between them, and on different levels.
The respective hammer base end portions 41 are supported and supported by the support shafts 3 and are swingably mounted.

As shown in FIG. 3, the sum of the swing radius R of the hammer 4 and the shaft radius r of the spindle 3 is the spindle 3...
・It is configured so that the distance between the axes t is smaller than the distance t between the axes of
Further, recessed portions 42, 42 having the same curvature as the outer peripheral surface of the space collar 12 are formed on both side surfaces.

According to the pulverizer of the present invention configured as described above, the raw material input from the input lower is pulverized by both the hammer 4 of the pulverizing rotor A rotating at high speed and the circular saw-shaped disc 2. The crushed material that has passed through the screen 10 and fallen to the bottom is taken out to the outside, but if the crushed raw material is a fibrous raw material C such as wood that has a large repulsion and is difficult to crush, the repulsion will cause the Even if the hammer 4 rebounds as shown by the chain line in , the sum of the swing radius R of the hammer and the radius r of the spindle is smaller than the distance t between the spindles, so... There is no collision with the adjacent support shaft 3, which eliminates problems such as the support shaft being bent, making it impossible to replace the hammer, or the tip of the hammer being chipped, causing fragments to fly and injuring the worker. .

In the present invention, the cushioning material 11 is inserted into the inner peripheral surface of the space collar 12, and the above-mentioned recesses 42, 42 are formed on both sides of the hammer 4, so that the hammer 4... Even if the space collar 12 collides with the space collar 12, the collision will be a surface collision, and the impact force will be dispersed and absorbed by the cushioning material 11, resulting in even better safety and service life. It becomes something.

Furthermore, in the present invention, in the case of raw materials that cannot be efficiently pulverized by the hammer 4 alone, the cutting pulverization by the cutting blade 5 of the circular disc 2 is carried out in parallel with the pulverization by the hammer 4. Since these are carried out simultaneously, there is also the advantage that the grinding efficiency is greatly improved.

As described above, the crusher of the present invention has a remarkable effect and is particularly useful for crushing fibrous raw materials such as wood, which have high rebound and are difficult to crush.

[Brief explanation of drawings]

Fig. 1 is a schematic cross-sectional view of essential parts showing one embodiment of the pulverizer of the present invention, Fig. 2 is a longitudinal sectional view of the grinding rotor employed in the pulverizer of the present invention, and Figs. 3 and 4 are: FIG. 3 is a diagram illustrating the operation of the main parts of the crushing rotor used in the present invention crusher and the conventional crusher, respectively. Explanation of main symbols in the drawings, 1...Rotation drive shaft, 2
・・・・・・Circular disk, 3・・・・Spindle, 4・
... Hammer 41 ... ° ... Hammer base end, 5 ... Cutting blade, A ... Grinding rotor, B ... ... Uzing, R: deviation radius, r: shaft radius, t: distance between shafts.

Claims (1)

[Scope of utility model registration request] A plurality of circular disks 2 are concentrically fixed to the rotary drive shaft 1, and a plurality of support shafts are fixed through the peripheral edge of the disks 2 in parallel with the rotary drive shaft 1. 3... and the disk 2... are arranged in the mutual gap between each spindle 3...
A crushing rotor A is built in a housing B, and the crushing rotor A is equipped with a large number of swingable hammers 4, each of which has a base end 41 supported by a shaft. In the crusher, a plurality of cutting blades 5 are formed on the outer peripheral surface of each of the circular disks 2, and the
・The sum of the swing radius R of the rotor 4 and the shaft radius r of the support shaft 3 is made smaller than the distance t between the shafts of the support shaft 3, and the disc 2 ...A space collar 12 is attached to the rotary drive shaft 1 within the mutual gap...
is externally fitted through a cushioning material 11 placed on the inner peripheral surface thereof, and furthermore, when the nozzle 4 swings and collides with the space collar 12, the collision is prevented by surface contact. A crusher having concave step portions 42 formed on the front and rear surfaces of the hammers 4 in the direction of swinging force as shown in FIG.