JPH0619825U - Horizontal hammer crusher - Google Patents

Abstract

(57) [Summary] [Purpose] To improve the maintenance of horizontal hammer crusher. [Structure] A recess 42 formed at the center of an end surface 41 of a hammer pin 4 and a projection 61 protruding from an end plate 6 fixed by a screw vault 62 are fitted to this end surface. The reaction force in the insertion hole 31 of the rotor disk 3 which receives the most impact when the hammer pin is crushed is integrally received by the fitting surface of the concave portion and the convex portion. [Effect] A direct load due to an impact is not applied to the tightening portion itself between the hammer pin and the end plate, so that the maintenance work of the device is reduced and the operation with few failures is guaranteed.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a horizontal hammer crusher used for primary crushing of coarse dust and secondary and tertiary crushing of rock, lime, etc.

[0002]

[Prior art]

 FIG. 2 shows a general structure of a horizontal hammer crusher, in which a rotor main shaft 2 is horizontally mounted in the center of a casing 1 and is rotated at a high speed by a drive motor. A plurality of rotor discs 3a are radially attached to the rotor spindle toward the inner wall of the casing at appropriate angles by dividing the circumference evenly, and the hammer pins 4a are inserted into the insertion holes formed in each rotor disc. The hammer 5a is pivotally supported by the hammer pin so that the hammer 5a can swing. When the object M to be crushed is fed from the object supply unit 7 opening above the casing, the object M collides with the head 52a of the hammer 5a rotating at high speed around the rotor spindle, and is crushed and splashed. , It collides again with the repulsion plate 11 suspended obliquely above the casing at high speed and is subjected to efficient crushing action. Since the crushed object is crushed by the collision with the hammer or the repulsion plate, the impact force applied to the hammer 5a is also very large, and in order to prevent the damage of the device due to this reaction force, the rotor disc, Special consideration must be given to the engagement relationship between the hammer pin and the hammer.

FIG. 3 is a part of a vertical cross-sectional front view showing a main part of a configuration conventionally adopted for this purpose, and is accompanied by a rotor disk 3 a which rotates at high speed around a rotor main shaft (not shown). The hammer pin 4a, which rotates at the same speed, is urged toward the outer peripheral side of the shaft by centrifugal force. Since the outer diameter D of the hammer pin is smaller than the inner diameter D1 of the insertion hole 31a of the rotor disk and is engaged in a loose fit, the hammer pin is pulled toward the outer diameter side in the insertion hole by centrifugal force. A gap d1 is formed. On the other hand, a larger centrifugal force is also applied to the head 52 of the hammer 5a which is loosely fitted to the hammer pin. Here, the inner diameter D2 of the mounting hole 51a of the hammer 5a is much larger than the outer diameter D of the hammer pin, but the hammer pin is blocked by the inner surface on the inner diameter side of the insertion hole of the rotor disk and cannot move further to the outer diameter side. From the above, the hammer 5a is pressed to the inner diameter side of the hammer pin by being urged to the outer diameter side by centrifugal force while being restrained by the hammer pin. To form a gap d2. When the crushed object collides with the head portion 52a of the rotating hammer 5a, the hammer 5 is pushed back toward the inner diameter side against the centrifugal force at that moment, and retreats in the range of the gap d2 to cause a sudden impact. ease. Along with this, the hammer pin also retreats within the range of the gap d1 to evoke the action of further facilitating the alleviation of impact.

As shown in the figure, the hammer pin 4a pivotally supporting the hammer 5a is loosely fitted in the rotor disk so as to be movable in the radial direction with respect to the rotor spindle, but with respect to the horizontal direction (left and right in the figure). The end plate 6a is fixed to the end surface 41a with a bolt 62a so as not to move, and serves as a stopper for the hammer pin. That is, since the end plate is screwed to the end surface of the hammer pin, the hammer pin is detached from the insertion hole 31a of the rotor disc even when the hammer pin rotates at high speed together with the rotor disc and when a large impact is applied during crushing. It is guaranteed that the crushing will continue without interruption.

[0005]

[Problems to be solved by the device]

 The crushing principle of the hammer crusher is that it is advanced by violent collision between the hammer and the object to be crushed, so that a large impact force is always applied to each part related to the crushing of the device. As described above, the impact force is buffered to protect each member of the device and its connecting portion. However, the general prior art structure shown in FIG. Therefore, it is not uncommon for the device to be quickly worn away, and in particular for the combination of the components to be loosened or rattling, resulting in a rapid decrease in the crushing efficiency. The most prominent part of this is the area around the hammer pin, where the reaction force of the shock during crushing is concentrated, and the hammer pin retreats to the inner diameter side at the moment the crushed object collides with the hammer. , When the impact is large, it collides with the outer diameter side of the hammer pin. In response to this impact, the hammer pin also retreats toward the inner diameter side, and the body itself collides with the inner surface on the inner diameter side of the insertion hole of the rotor disk. In this way, the hammer pin is repeatedly subjected to centrifugal force and impact with the object to be crushed repeatedly while the device is operating, and repeatedly collides with the inner surface of the insertion hole, and this inertial force is directly applied to the end plate to fix the end plate and the hammer pin. There is a problem in that the screw vault 62a that is in use suffers from violent vibration, looseness and rattling, and even in the long term, metal fatigue of the material may occur, leading to sudden fracture.

An object of the present invention is to provide a horizontal hammer crusher having a novel structure in consideration of maintenance in a crushing main part in order to solve the above-mentioned problems.

[0007]

[Means for Solving the Problems]

 The horizontal hammer crusher according to the present invention comprises a rotor spindle 2 which horizontally rotates in a substantially central portion of a casing 1, a rotor disc 3 in which the circumference of the rotor spindle is equally divided by an equal angle, and a rotor disc 3 of the rotor disc. It consists of a hammer 5 that is loosely fitted to a hammer pin 4 that is loosely fitted into the insertion hole 31, and the hammer pin 4 is attached to the center of an end plate 6 that is detachably screwed to an end surface 41 that projects from the end of the rotor disk 3. The above problem is solved by providing a convex portion 61 projecting to the hammer pin side and fitting the concave portion 42 formed in the end surface of the hammer pin.

[0008]

[Action]

 In the horizontal hammer crusher according to the present invention, since the concave portion of the hammer pin and the convex portion of the end plate are fitted, even if the hammer pin is impacted and jumps violently in the insertion hole of the rotor disk, All the reaction force is received by the side surface of the mating part, the hammer pin and the end plate move up and down integrally via this mating close contact surface, and the screw vault that screws them both engages in the radial direction of the shaft. Since no load is directly applied, there is no fear of causing any wear or rattling at this fixed part.

[0009]

Embodiment FIG. 1 is a vertical sectional front view showing a main part of an embodiment of the present invention. The entire apparatus is the same as the casing 1, the rotor main shaft 2 and the supply unit 7 shown in FIG. 2, and is omitted in this figure. A hammer pin 4 is loosely movably inserted into an insertion hole 31 of a rotor disk 3 which is regularly and radially attached to a rotor main shaft (not shown) so as to be movable in the radial direction of the main shaft, and a hammer 5 is further loosely fitted to this hammer pin. . The inner diameter D1 of the insertion hole 31 of the rotor disk, the inner diameter D2 of the mounting hole 51 of the hammer 5, and the outer diameter D of the hammer pin, and the gap d1 formed between the rotor disk 3 and the hammer pin 4, The relationship between the gaps d2 formed between the hammer 5 and the hammer pin 4 is no different from that of the conventional technique shown in FIG. An end plate 6 is screwed by a screw vault 62 to the end of the hammer pin 4 projecting from the end face 41 of the rotor disk. The end face 41 of the hammer pin is provided with a recess 42 centered on the axis of the pin, but in this embodiment it is a round hole. However, the shape of the recess is not particularly limited, and may be, for example, a conical hole. On the other hand, on the inner surface of the end plate, a convex portion 61 that fits into the concave portion is provided at the center of the inner surface of the end plate, and in this embodiment, it is formed of a cylindrical protrusion that fits into a round hole. It goes without saying that the fitting may be such that the conical inclined surface is intimately pressure-bonded to integrally receive the shock.

[0010]

[Effect of device]

 As described above, the horizontal hammer crusher according to the present invention is structurally improved in the end plate mounting part where the reaction force of impact is most concentrated and wear or loosening of tightening is likely to occur directly. Since the load on the equipment is not applied, the maintenance work of the equipment is reduced, and the effect of ensuring stable daily operation with few failures can be obtained.

[Brief description of drawings]

FIG. 1 is a vertical sectional front view showing a main part of an embodiment of the present invention.

FIG. 2 is a front view showing the entire horizontal hammer crusher.

FIG. 3 is a vertical sectional front view showing a main part of the embodiment.

[Explanation of symbols] 1 casing 2 rotor spindle 3 rotor disk 4 hammer pin 5 hammer 6 end plate 7 supply part 31 insertion hole 41 end face (hammer pin) 42 recess 51 mounting hole 61 convex part M crushed object D hammer pin outer diameter D1 Inner diameter of insertion hole of rotor disc D2 Inner diameter of attachment hole of hammer d1 Gap between rotor disc and hammer pin d2 Gap between hammer pin and hammer 5

Claims (1)

[Scope of utility model registration request] 1. A rotor main shaft 2 which horizontally rotates substantially in the center of a casing 1, a rotor disk 3 in which a circumference of the rotor main shaft is divided at equal angles and which are evenly mounted, and an insertion hole 31 of the rotor disk. In a horizontal hammer crusher consisting of a hammer 5 that is loosely fitted to a hammer pin 4 that is loosely fitted, the hammer pin 4 is attached to the center of an end plate 6 that is detachably screwed to an end surface 41 that projects from the end of the rotor disk 3. A concave portion 4 provided with a convex portion 61 protruding toward the pin side and formed in the end surface 41 of the hammer pin
A horizontal hammer crusher characterized by being fitted with 2.