JPH0425228Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The invention makes it possible to adjust the crushing gap between the rotating impact member and the collision plate, and to widen it and automatically return it when a foreign object such as a piece of iron gets mixed in. This invention relates to a holding device for holding during crushing in an impact crusher.

[Prior Art] For example, as shown in FIG. 4, an impact crusher has a rotary impact member 4, which has a plurality of impact plates 3 attached to a holding member 2 attached to a horizontal rotating shaft 1, inside a casing 5. While rotating at high speed and crushing the object to be crushed (not shown) supplied from the supply port 6 by applying a large impact force, the upper end is pivotally connected to the casing 5 by the pin 7 and the object to be crushed (not shown) is rotated around the rotating impact member 4. It collides with the arranged collision plate 8 and is crushed into smaller pieces to be sent to the discharge port 9.
A crushing gap holding device 10 that allows the crushing gap between the rotating impact member 4 and the collision plate 8 to be adjusted and held so that it can be widened and automatically returned when a foreign object such as a piece of iron is mixed in. Conventionally, the fourth
It is constructed as shown in FIG.

In the figure, the inner end of an adjustment bolt 11 that movably passes through the casing 5 is pivotally attached to the lower end of the collision plate 8 by a pin 12. Adjustment bolt 1
A spring presser 13 is movably fitted to the outer end of the fifth
As detailed in the figure, two fixing bolts 15 whose base ends are pivotally connected to the outside of the casing 5 by pins 14
The fixing bolt 1 is movably fitted to the tip of the
A nut 16 and a lock nut 17 screwed onto the tip of the bolt 5 prevent the bolt from coming off the fixing bolt 15.

Adjustment bolt 1 protruding from spring retainer 13
An adjustment nut 18 is screwed onto the outer end of the adjustment bolt 11, and a spring receiver 19 is movably fitted into the adjustment nut 18 near the middle part of the adjustment bolt 11.
are connected by a connecting pipe 20. A compression coil spring 21 is fitted into a connecting pipe 20 between the spring presser 13 and the spring receiver 19.

In FIG. 5, 22 is a lock nut with a cap 23, and 24 is a spring receiving seat attached to the outside of the casing 5.
This restricts the movement of the casing 9 in the 5 direction.

In the crushing holding device 10 configured as described above,
By loosening the capped lock nut 22 and turning the adjusting nut 18 in an appropriate direction, the crush distance between the rotating impact member 4 and the collision plate 8 can be adjusted by moving the adjusting bolt 11 in the axial direction. In addition, when a foreign object is mixed in, the compression coil spring 21 that presses the collision plate 8 with a constant load via the adjustment bolt 11 is contracted, the lower end of the collision plate 8 moves, and the width of the space between the pieces of debris is widened. After passing through, the compression coil spring 21 restores the collision plate 8.
The lower end of the machine returns to its original position, and automatic return occurs between crushing stages.

[Problems to be Solved by the Invention] However, according to the conventional crushing holding device 10, the spring receiver 19 connected to the adjustment nut 18 via the connecting pipe 20 is compressed by the compression coil spring 21. Since it is pressed against the sheet 24, it takes a great deal of effort to turn the adjusting nut 18 to adjust the crushing interval, and it takes a long time of 30 minutes to 2 hours.
In general, especially large machines, many of these types of machines are installed outdoors and do not have roofs, making footing very difficult in rainy weather, which is dangerous as workers must climb on top of the machines to work. .

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a crushing interval holding device for an impact crusher, which allows the crushing interval to be adjusted safely and quickly by remote control.

[Means for solving the problem] The crushing holding device of the impact crusher of the present invention is
In order to solve the above-mentioned problem, in an impact crusher in which a collision plate whose upper end is pivotally connected to the casing is arranged around a rotating impact member provided in the casing, the casing is attached to the lower end of the collision plate. The inner end of the support rod that is movable and penetrates through the support rod is pivoted, a support bracket is fitted to the outer end of the support rod so as to be movable while preventing the support rod from separating from the support rod, and the support bracket is provided in the middle of the support rod. A hydraulic cylinder in which a spring is fitted into a support rod between a spring receiver and a support bracket, and the cylinder body is pivoted to the outside of the casing parallel to the support rod, and the support bracket is pivotally connected to the tip of the piston rod. It is.

[Function] By supplying and discharging hydraulic oil to the hydraulic cylinder,
The support rod connected to the hydraulic cylinder via the support bracket moves without being affected by the acting force of the spring, and the crushing interval is adjusted.
And the piston rod of the hydraulic cylinder is held in that state. When a foreign object enters, the spring is contracted and the lower end of the collision plate moves together with the support rod, widening the gap between crushers. After the foreign object has passed, the lower end of the collision plate returns to its original position due to the restoration of the spring and breaks into pieces. An automatic return is performed during the interval.

[Embodiment] An embodiment of the crushing holding device of the impact crusher of the present invention will be described with reference to FIGS. 1 to 3.

In the following description, the same components as those shown in FIG. 4 are designated by the same reference numerals, and the description thereof will be omitted.

In the figure, the inner ends of two support rods 25, which movably penetrate the casing 5 and are spaced apart in the width direction of the collision plate 8 (in the left-right direction in FIG. 2), are attached to the lower end of the collision plate 8. 26. The support rods 25 cooperate with support brackets, hydraulic cylinders, etc. to be described later to constitute a crushing holding device 27, and a channel-shaped support bracket 28 is provided at the outer end of both support rods 25.
is movably fitted therein, and this support bracket 28 is prevented from detaching from both support rods 25 by a stopper 30 fixed to a nut 29 screwed into the outer end of the support rod 25. and,
The nut 29 is lockable by a lock nut 31 with a cap 31a screwed onto the support rod 25.

A spring receiver 32 is provided at the middle part of the support rod 25 outside the casing 5 and fixed to a nut 33 screwed into this middle part.
3 is a lock nut 3 screwed onto the support rod 25;
4 so that it can be locked. A compression coil spring 35 is fitted in the support rod 25 between the spring receiver 32 and the support bracket 28. The compression coil spring 35 applies a constant load in the direction of the rotating impact member 4 to the collision plate 8 via the support rod 25, and also contributes to the widening of the crush gap and automatic return when foreign matter is mixed in by shrinking and restoring. However, it is also possible to use multiple springs regardless of this.

A stopper 36 is provided between the lock nut 34 and the casing 5 at an intermediate portion of the support rod 25 outside the casing 5, and is fixed to a nut 37 screwed onto the support rod 25.
7 is a lock nut 38 similar to the nut 33 above.
It is provided so that it can be locked. stoppa 3
Reference numeral 6 is for preventing contact between the collision plate 8 and the rotating impact member 4 due to the movement of the support rod 25, and is provided so as to be able to come into contact with a receiving seat 39 attached to the outside of the casing 5. , these stopper 36, nut 37, etc. do not need to be installed.

On the other hand, a bearing bracket 40 is provided outside the casing 5 near the support rod 25.
In the bearing bracket 40, a clevis 42 provided on the cylinder body 41a of the hydraulic cylinder 41 is connected to the pin 4.
It is pivoted by 3. The cylinder body 41a of the hydraulic cylinder 41 is provided parallel to the support rod 25, and the clevis 44 attached to the tip of the piston rod 41b is connected to the support bracket 2.
8, and is movably penetrated through the support bracket 2.
A pin 46 is attached to a bearing bracket 45 provided on the outside of 8.
It is more pivoted.

In order to adjust the crushing interval using the holding device 27, hydraulic oil is supplied and discharged from the cylinder body 41a of the hydraulic cylinder 41, and the piston rod 4
1b is expanded and contracted, and the support rod 25, which is connected in parallel to the piston rod 41b via the support bracket 28, is moved. In addition, when foreign matter enters, the compression coil spring 35 is contracted, and the lower end of the collision plate 8 along with the support rod 25 is damaged by the rotating impact member 4.
After the foreign object has passed, the lower end of the collision plate 8 returns to its original position due to the restoration of the compression coil spring 35, and the crushing gap is widened as it moves away from the debris.
automatic recovery is performed.

In addition, in the above embodiment, the hydraulic cylinder 4
Although the case has been described in which the clevis 44 attached to the tip of the piston rod 41b of No. 1 is pivotally connected to the bearing bracket 45 provided on the outside of the support bracket 28, the present invention is not limited to this.
It may also be pivoted to a bearing bracket provided inside the holder.

Further, in the above embodiment, the rotating impact member 4
Although the case has been described in which the rotary impact member is rotated in both directions, the present invention can also be applied to an impact type crusher in which the rotary impact member is rotated in one direction.

Furthermore, the number of collision plates 8 is not limited to four, but can also be applied to an impact type crusher with two or one.

[Effects of the invention] As described above, the crushing time of the impact crusher of the invention is
According to the holding device, the adjustment and holding of the crushing interval can be carried out.
This can be done by simply supplying and discharging hydraulic oil to the hydraulic cylinder without being affected by the acting force of the spring, so it can be done safely and quickly by remote control without the need for manual adjustment by workers as in the past. can be done.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional view showing an embodiment of the crushing holding device of the impact crusher of the present invention, Fig. 2 is an enlarged sectional view taken along the - line in Fig. 1, and Fig. 3 shows the main parts thereof. Enlarged view, Figure 4 is a vertical cross-sectional view of the prior art, Figure 5
The figure is an enlarged sectional view taken along the line - in FIG. 4. 4...Rotating impact member, 5...Casing, 7...
...Pin, 8...Collision plate, 25...Support rod, 2
6...Pin, 28...Support bracket, 29...
Nut, 30...Stopper, 32...Spring receiver, 33...Nut, 35...Compression coil spring, 41...Hydraulic cylinder, 41a...Cylinder body, 41b...Piston rod, 43,4
6...Pin.

Claims (1)

[Scope of utility model registration request] Around the rotating impact member provided inside the casing,
In an impact type crusher, which includes a collision plate whose upper end is pivotally connected to the casing, the inner end of a support rod that movably penetrates the casing is pivotally attached to the lower end of the collision plate, and the inner end of the support rod is pivoted to the lower end of the collision plate. A support bracket is fitted to the outer end so as to be movable while preventing separation from the support rod, and a spring is fitted to the support rod between the support bracket and a spring receiver provided at the middle of the support rod to provide support. A crushing holding device for an impact type crusher, characterized in that the support bracket is pivotally attached to the tip of a piston rod of a hydraulic cylinder whose cylinder body is pivotally attached to the outside of a casing parallel to the rod.