JPS61263658A - Impact element for grinder - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a striker for a crusher, and an object of the present invention is to change the arrangement of a corner used as a striking surface using a simple and rational structure. The purpose is to improve the durability of a striker whose diagonal corner portions can be used uniformly without any work.

A crusher (hammer mill) is a rotating body consisting of a plurality of coaxial disks arranged at a predetermined distance from each other, and a hammer is placed near the outer periphery between the disks in parallel to the axial direction. The corner portion that becomes the striking surface is provided so that it can protrude outward from the rotating body through the provided mounting rod due to the centrifugal force action caused by the rotation of the disc, and the object to be crushed is struck with the protruding corner portion of the striker. It is structured to give However, in the conventional striking device, in order to use the diagonal corners of the rectangular plate-like striking device as the striking surface (when rotating the rotating body in both forward and reverse directions, the two protruding corners are used). The mounting rod insertion holes are provided in two places, and the mounting rod is first inserted into one of the two insertion holes drilled in the striker. When a corner becomes worn, the mounting rod is inserted again into the other insertion hole, and the insertion position of the mounting rod is changed so that the other corner becomes the striking surface. In order to change the insertion position of the mounting rod, it is necessary to temporarily stop the rotating body, remove the mounting rod, and manually replace the large number of striking elements one by one, which results in a missed opportunity for this work. Then, one corner becomes too worn, resulting in poor balance and vibration, and in some cases, there is a risk that the other corner cannot be used as a striking surface at all. Therefore, the applicant of the present application made the mounting push-insertion hole a long hole,
A striker for a crusher in which the corner on the diagonal line replaces the other corner with a probability of approximately 1/2 each time the rotating body is started or stopped, and the corner on the opposite side protrudes (patent application No. 59) -680
68) and achieved some success. However, simply speaking, a long hole shape is usually a narrow rectangle with both ends perpendicular to the longitudinal direction, or an oval shape with both ends shaped like an arc with a diameter equal to the width. Moreover, in order to allow the position of the mounting rod to move relatively within the elongated hole, it is necessary to make the width somewhat larger than the diameter of the mounting rod. Therefore, both ends of the mounting push-through hole and the mounting rod are the eighth
As shown in Figure a and Figure 8, contact is made only at contact point A (Ao), so whenever the position of the attachment rod moves to the other end, the impact of the attachment rod hitting that end is at the corresponding contact point A. (A'
) If the impact is concentrated on one point and repeatedly applied to the same point, cracks and cracks are likely to occur at the hit point.If the impactor continues to be used with cracks and cracks, it will fall off and cause damage to the crusher. Not only will it cause trouble, but if metal powder gets mixed into the material to be crushed even if it does not fall off, for example, in the case of ceramic raw materials, it will result in a number of defective products with black spots on the fired products, and in the case of food raw materials, There are problems that need to be improved, such as undesirable food hygiene issues.

In order to prevent the impactor from cracking or cracking, it is necessary to reduce the impact when the mounting rod hits the end.To do this, it is necessary to stop the impact at multiple points and disperse the impact force. Conceivable.

The present invention has been invented based on this clear understanding, and has further improved the above-mentioned striker in which the mounting insertion hole is formed into a long hole, and has excellent durability that does not easily cause cracks or cracks even under hard use. This is a rectangular plate-shaped impactor for a crusher in which the mounting push-insertion hole is formed as a long hole with both ends set at predetermined mounting rod insertion positions. The inner side is at least an inclined or arc-shaped two circumferentially circumscribed to the mounting rod and symmetrical about the longitudinal center line.
The reason is that it is formed into a desired shape having sides or an arc shape having a diameter equal to the diameter of the circumscribed circle of the mounting rod. Here, the predetermined mounting rod insertion position means that when the mounting rod is inserted into this position and attached to the rotating body, the corner part protrudes outward from the disk due to the action of centrifugal force and hits the object to be crushed. A position that can be given.

In the case of a conventional two-hole striker, this corresponds to the drilling positions of the two attachment push-through holes that are symmetrical with respect to the center line perpendicular to the longitudinal direction.

Next, an example of the present invention will be described with reference to the drawings.

FIGS. 1 and 2 show an embodiment of the striker according to the present invention, and the attachment push-through hole 2 of the striker 1 having a rectangular plate shape has both ends 2a, 2a4 at predetermined positions as shown in the figure. It corresponds to the mounting rod insertion position, and the width is slightly wider than the mounting rod 3, so that the loosely inserted mounting rod 3 can move relatively from one end to the other end with a margin.

Here, relative movement means that the striker moves along the insertion hole by the distance between both ends of the attachment insertion hole, but when viewed only in terms of the relationship between the striker and the attachment rod. , it can also be seen that the mounting rod moves, so 0 both ends 2a using such wording for expression.
, 2a are cut into a V-shape that is symmetrical with respect to the center line in the longitudinal direction of the striker. Incidentally, to show the specific dimensions of the mounting rod 3 and the mounting push-through hole 2, the diameter of the mounting rod is 25 mm, and the width of the mounting push-through hole is 28 mm. The mounting rod 3 is inserted into the mounting insertion hole 3 of the striker l, and the discs 4a, 4 in the rotating body 4 are inserted.
If installed inside the outer periphery between a, the mounting rod will move relatively at a rate of approximately 1/2 each time the rotating body starts and stops, and the end of the insertion hole that the mounting rod comes into contact with will change places. . In other words, while the rotary body is rotating and centrifugal force is acting on the striking elements, the corners of all the striking elements protrude radially outward from the disk relative to the axis of the rotating body, for example, above the disk. The striker located at When the striker descends and the upper end comes into contact with it (Fig. 4a), or rotates 45 degrees from there, the striker will either descend as it is and the position of the attachment rod will change, or the position of the attachment rod will change. Whether the protruding end side rotates downward as it is is 5.
5 minutes (Fig. 4b), and all the striking elements located in the lower half of the disc rotate downward with their protruding ends while leaving the mounting rods in the same position. In reality, a rotating body does not come to a momentary stop, so it is assumed that the mounting rod reciprocates within the mounting insertion hole until it stops due to the balance between centrifugal force and gravity. According to the experimental data, it was confirmed that the average probability that the position of the mounting rod changes due to one start and stop is about 1 in 2.

In the striker of this embodiment, when the mounting rod contacts the end of the mounting push-through hole, it contacts at two contact points B and C, so that the impact force at the time of impact is reduced by half at each point. As a result, the impact force applied to each point is reduced by half compared to the conventional method, where it is received at a single point. Therefore, durability is greatly improved.

In the above embodiment, the shape of the 1M end is V-shaped, that is, it is composed of only two symmetrical inclined sides that circumscribe the mounting rod, but the two inclined sides circumscribe the mounting rod and are aligned with the center line in the longitudinal direction. As long as it is symmetrical, it does not matter the shape of the number of sides that are continuous to both sides.1 For example, a continuous part that is continuous to both sides is formed on the circumscribed side of the mounting rod that is perpendicular to the longitudinal direction. Then, as shown in Figure 5 a, the impact can be stopped at the three points E and F, as shown in Figure 5 a, or the continuous part can be attached to other points that can be circumscribed to the rod as shown in Figure 5. If it is constructed with two slanted sides, the receiver can be stopped at four contact points G, H, 1, and J, and further improvement in durability can be expected. In this way, if you increase the number of continuous circumscribed edges on both sides, the impact force will be stopped at that many points, and the impact force at one point will become weaker, and the number of circumscribed edges can be increased infinitely. The final result is an arc shape that matches the outer circumference of the mounting rod.

Fig. 6 shows an embodiment in which the two sides circumscribing the mounting rod are arcuate rather than slanted sides as described above, and the two arcuate sides having a larger diameter than the circumscribed circle of the mounting rod, that is, the contact point B and C are configured to stop receiving impact.

Since the sides on these arcs need to circumscribe the attachment rod, they are formed on an arc having a diameter greater than the diameter of the circumscribed circle of the attachment rod. Note that the number of sides that are continuous to both sides and the shape of the sides are not limited to those mentioned above, and may be straight sides, arcuate sides, or sides that do not circumscribe the mounting rod.

From the above explanation, it can be understood that it is desirable to have a larger number of edges circumscribing the attachment rod in order to receive the impact from the attachment rod. However, if the number of circumscribed edges is increased infinitely, the impact is applied not as a point but as an edge. The means for stopping the receiver is an embodiment shown in FIG. That is, the attachment push-through hole in the striker of this embodiment is formed in the shape of an arc having a diameter equal to the outer circumference of the attachment rod between -L and the contact point.

Incidentally, the width of the mounting insertion hole is 28 mm, the diameter equal to the outer periphery of the mounting rod is 25 mm, and the arc-shaped portion and the blue-white side are formed as a continuous side with no step. A striker formed in this manner can receive and stop the impact force not at a point but at the entire side, and the effect of mitigating the impact force is even more excellent.

In addition, in order to uniformly use all the corners, not just the two diagonally located corners, the rotation direction of the rotating body should be changed appropriately, and the corner on one side of the rotation direction should be used. It is desirable to prevent the corners from being worn out.

As described above, according to the present invention, in a striker that can save the trouble of checking and replacing the replacement time each time, there is a probability of approximately 1 in 2 that the mounting rod will be replaced each time the rotating body is started or stopped. Since the impact applied to both ends of the mounting push-through hole can be stopped at multiple points or sides, the risk of cracking or splitting due to the impact is greatly reduced, and durability is improved. I can do it. Therefore, there is no need to worry about troubles occurring with the crusher, and there is no risk of metal powder, fragments, etc. getting mixed into the object to be crushed, and the present invention brings great benefits.

[Brief explanation of the drawing]

° Fig. 1 is a perspective view showing an embodiment of the striker according to the present invention, Fig. 2 is an explanatory view showing the state of contact between both ends of the attachment push-through hole in the striker and the mounting rod, and Fig. 3 4 is a sectional view showing the main part of the crusher to which the striking element is attached.
Figures a and b are explanatory diagrams showing a state in which the striking surfaces of the striking element are replaced. Figures 5a, b, 6 and 7 are explanatory diagrams showing the state of contact between the ends and the mounting rod in a modified example of the shape of both ends, and Figures 8a and b are illustrations of the conventional striker. It is an explanatory view showing a state of contact between the end of the attachment push-through hole and the attachment rod. l...Blower, 2Φφ installation push-through hole, 3...End part,
4 fists/rotating body, 4a...disc, A, A', B, C, D,
E, F, G, H, I, J, K, L... Contact points. Patent applicant: Onoe Kikai Co., Ltd. ,,+-,,,1''. Agent: Patent attorney: Ishi 1) -tQ---- Patent attorney: Junko Saito Figure 1 Figure 2 Figure 4 Q

Claims (1)

[Claims] In a rectangular plate-shaped crusher striker in which the mounting rod insertion hole is formed as a long hole with both ends thereof set at predetermined mounting rod insertion positions, A striker for a crusher, characterized in that it is formed into a required shape having two sides that are symmetrical with respect to the center line of the direction and have an inclined or arcuate shape, or an arcuate shape that has a diameter equal to the diameter of the circumscribed circle of a mounting rod. .