JPS6236518Y2 - - Google Patents

Description

[Detailed explanation of the invention] (a) Industrial application field The present invention relates to a gravel crushing device for crushing loose gravel so that it can be used as construction sand.

(b) Conventional technology and the problems to be solved by the present invention Conventional crushers crush gravel by forcefully pressing it with a pair of rollers; Because it had a complex structure,
Manufacturing costs were high and transportation was not easy.

(c) Means for solving the problem In view of the problem, the present invention provides a crushing bowl with a double structure on the machine frame, and a conical grinding barrel with a double structure is fitted inside the crushing bowl. , the rotating main shaft of the grinding drum is supported vertically by a bearing and is connected to a drive motor,
This device is capable of manufacturing sand for construction by finely crushing loose gravel using a device having a simple structure in which gravel can be introduced from above the crushing pot.

(d) Embodiment and operation An embodiment of the present invention will now be explained with reference to the drawings as follows.

1 in the figure is the machine frame installed vertically on the base 2,
A crushing pot 3 having a double structure with inner wall plates a, a, . . .

Reference numeral 4 denotes a conical grinding drum having a double structure with outer wall plates b, b...b screwed onto the outer circumferential surface, which fits into the crushing bowl 3 and is integrally provided at the upper end of the grinding drum 4. The rotating main shaft 5 is vertically supported by a bearing 6 fixed to the machine frame 1 and coaxially connected to a drive motor 7 fixed to the front surface of the machine frame 1 above the bearing 6.

Reference numeral 8 denotes a gravel charging hopper attached to the upper end of the crushing bowl 3. The lower end of this hopper 8 is fixed to the rotating main shaft 5 and is connected to the lower surface side of a conical bounce prevention member 9 provided above the grinding barrel 4. There is a bifurcated opening c along the inner side of 3.

Reference numerals 10 and 10 designate vertical adjustment screws for the crushing pot 3, which are provided so that sprockets 11, 11 are fixed to their intermediate portions, and a chain 12 is spanned so that the left and right sides can be operated integrally.

13 is a discharge port opened at the lower end of the crushing pot 3;
...14 is a tightening screw for fixing the crushing pot 3 to the machine frame 1, and is screwed into a screw rod 16 passing through long holes 15, 15 provided on the side of the back panel b.

Although not shown in the drawings, the crushing pot 3 is divided into two parts so that it can be expanded freely so that the inner wall plates a...a of the crushing pot 3 and the outer wall plates b...b of the conical grinding drum can be easily replaced. It is also possible to do so.

Since the present invention is constructed as described above, turn on the power now, start the drive motor 7, and move the grinding drum 4.
If loose gravel is supplied to the input hopper 8 while rotating the
The sand is thrown into the crushing bowl 3, falls between the crushing bowl 3 and the rotating grinding drum 4, is crushed and processed into sand, and is discharged from the discharge port 13 of the crushing bowl 3, but it cannot be used continuously for a long period of time. When the inner wall plates a...a of the crushing pot 3 and the outer wall surfaces b...b of the grinding barrel 4 are worn out and the gap between the crushing pot 3 and the grinding barrel 4 widens, tighten the tightening screws 14, 14.
Loosen the adjustment screws 10, 10, push the crushing bowl 3 upwards, retighten the tightening screws 14...14, securely fix the crushing bowl 3 to the machine frame 1, and then again.
The grinding cylinder 4 is rotated to continue crushing loose gravel.

(e) Effects of the invention In this invention, as described above, a double-structured crushing bowl is attached to the machine frame, and a conical grinding barrel provided in a double structure is fitted inside this crushing bowl. It has a simple structure in which the rotating main shaft is supported by a bearing and connected to a drive motor, making it easy to manufacture and handle.Furthermore, since it is vertical, it does not require a large space, and can be miniaturized, making it easy to move and transport. In addition, by moving the crushing bowl up and down and adjusting the gap between the crushing bowl and the grinding drum, it has various features such as being able to process not only sand but also products with the desired particle size. It is something.

[Brief explanation of the drawing]

Figure 1 is a side view of the invented product. FIG. 2 is a longitudinal sectional front view of the main parts of the invented product. FIG. 3 is a partial longitudinal sectional view of the product of the present invention. In the figure, 1 is the machine frame, 3 is the crushing pot, 4 is the grinding barrel, and 7
is the drive motor, 8 is the input hopper, and 9 is the bounce prevention plate.

Claims (1)

[Scope of utility model registration request] A double-structured crushing bowl is installed at the bottom of the machine frame so that it can be adjusted up and down, and a conical grinding barrel with a double structure is fitted inside this crushing bowl, and the main shaft of the grinding barrel is rotated vertically by a bearing. A gravel charging hopper is installed above the crushing bowl, and the lower end of this hopper opens toward the bottom of a splash-preventing member fixed to the rotating main shaft and installed above the grinding drum. Gravel crushing equipment.