JP2508768Y2 - Rotation type crusher - Google Patents

Description

[Detailed description of the device]

[0001]

[Industrial application] The present invention relates to a rotary crusher such as a cone crusher or a gyratory re-crusher for crushing rocks or slag, and particularly to the length of a concave used for a medium or small gyratory re-crusher It is intended to extend the life.

[0002]

2. Description of the Related Art A conventional gyratory re-crusher which is the background of the present invention is disclosed in, for example, Japanese Utility Model Laid-Open No. 1-77844. Jai rate Li crusher 1 _b of the above disclosure, as shown in FIG. 4, a substantially conical tubular shaped concave inside 3 deployed fitted vertically upper body 2 inside the mounting hole 2 _a, supported on a lower body 4 By rotating the mantle 5 having a substantially truncated cone shape in an eccentric state, the raw material supplied between the concave 26 and the mantle 5 is crushed by pressure. The upper outer peripheral portion of the concave 26 is formed with a first tapered surface 6 _a ring-like which widens downward, the lower end outer peripheral portion, the ring-shaped for expanding upward Two tapered surfaces 6 _b are formed. The concave 26 has the first tapered surface 6 _a.
And the ring-shaped third taper surface 7 formed on the inner peripheral portion of the mounting hole _2a are fitted to each other, and the second taper surface _6b and the fourth taper surface of the holding member 8 having a wedge-shaped cross section. It is supported in the upper body 2 by fitting with 8 _a . The ring-shaped holding member 8 is inserted in a wedge shape between the upper body 2 and the second tapered surface 6 _b by a bolt 9 and a nut 10. Therefore, by loosening the bolt 9, the holding member 8 is removed and the concave 26 is attached to the mounting hole 2.
It can be easily removed from _a . Further, the rotation preventing key 11 is for preventing the concave 26 from rotating within the mounting hole _2a .

[0003]

By the way, as shown in FIG. 5, the wall thickness of the concave 26 is taken into consideration in terms of strength required to support the crushing load and surface wear due to crushing. It is constituted by the sum of the thickness of the worn margin (hatched portion in the figure). In addition, the wear amount t _{1 to} t ₄ of the concave 26 is generally gradually increased from the upper portion to the lower portion. Therefore, even if the wear of the lower part of the concave portion 26 progresses to a certain level, and the upper part of the concave part 26 has a relatively sufficient thickness before the remaining thickness lost due to the wear reaches the minimum required thickness for strength. Nevertheless, the concave 26 had to be replaced. Therefore, the concave 26 has a relatively short life, which prevents the running cost from being reduced. Therefore, the purpose of the present invention is to
An object of the present invention is to provide a rotary type crusher having a long-life concave.

[0004]

In order to achieve the above-mentioned object, the main means adopted by the present invention is, as its gist, a substantially cylindrical concave which is vertically inserted into a mounting hole inside a body. A first tapered surface that expands downwardly is formed on an outer peripheral portion of the concave portion, and a second tapered surface that expands upward is formed below the first tapered surface on the outer peripheral portion of the concave portion. Further, a third tapered surface that fits with the first or second tapered surface of the concave is formed on the inner peripheral portion of the mounting hole, and the second tapered surface of the concave is formed on the inner peripheral portion of the mounting hole. Alternatively, a holding member having a wedge-shaped cross section having a fourth tapered surface that fits with the first tapered surface is detachably provided, and the holding member is provided between the outer peripheral portion of the concave and the inner peripheral portion of the mounting hole. It is pressed to cut into the Both taper surfaces of the cave are sandwiched between a third taper surface formed on the inner peripheral portion of the mounting hole and a fourth taper surface of the holding member, and an approximately frustoconical mantle is eccentric in the concave. In a rotary type crusher that swirls and crushes the supplied raw material between the concave and the mantle, the taper angles of all the first to fourth tapered surfaces are set equal, and the third The first or second taper surface fitted with the taper surface of No. 1 is set as a rotary crusher according to a point set to fit with the fourth taper surface when the concave is turned upside down. ing.

[0005]

In the rotary type crusher according to the present invention, during use, the lower part of the concave is much thinner than the upper part due to wear.
The holding member is removed while the thickness of the worn lower portion of the concave portion still retains sufficient strength, and the concave portion is removed from the mounting hole, inverted, and mounted again in the mounting hole. Since the upper and lower tapered surfaces of the concave have the same angle as described above, both tapered surfaces of the concave are formed, for example, on the inner peripheral portion of the mounting hole even in the inverted state. Since the third taper surface and the fourth taper surface of the holding member are closely fitted, they are firmly sandwiched and fixed. At this time, a relatively thick part with less wear is placed under the inverted concave part. As a result, the concave can be used further and its life can be extended.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments embodying the present invention will be described below with reference to the accompanying drawings for the understanding of the present invention. It should be noted that the following embodiments are examples of embodying the present invention and are not of the nature to limit the technical scope of the present invention. 1 is a vertical sectional view showing a gyratory re-crusher according to an embodiment of the present invention, FIG. 2 is a longitudinal sectional view showing a concave portion of the gyratory re-crusher, and FIG. 3 is another sectional view of the present invention. It is a longitudinal section showing a gyratory re-crusher provided with a concave according to an example. However, with the conventional Jai rate Li crusher 1 _b and common elements shown in FIG. 4 using the same reference numerals, and detailed description thereof will be omitted. The gyratory re-crusher 1 according to the present embodiment is
As shown in FIGS. 1 and 2, the conventional Jai rate Li crusher 1 _b and the basic structure is substantially the same, one of the differences between the conventional Jai rate Li crusher 1 _b is
The taper angle θ _{1 with} respect to the machine center C of the ring-shaped first taper surface 6 _a which is formed on the outer peripheral portion of the upper end of the concave 6 and expands downward (hereinafter, the taper angle means the angle with respect to the machine center C. And the taper angle θ ₂ of the ring-shaped second taper surface 6 _b formed on the outer peripheral portion of the lower end of the concave 6 and expanding upward, and the above-mentioned inner peripheral portion of the mounting hole 2 _a. The taper angle of the third taper surface 7 formed at the position facing the first taper surface 6 _a and the taper angle of the fourth taper surface 8 _a formed on the holding member 8 are all set to be equal. That is. Thereby, as will be described later, the concave 6 in use can be turned upside down for further use. Further, the other one difference, the first tapered surface 6 _a of the concave 6 to be fitted to the third tapered surface 7 of the mounting hole 2 _a is, the holding when turned upside down the concave 6 That is, it is set at a position to be fitted with the fourth tapered surface 8 _a of the member 8. Further, the concave 6 has a distance r ₁ from the machine center C to the outermost end 6 _{c of} the first tapered surface 6 _a and a distance r ₁ from the machine center C to the outermost end 6 _{d of} the second tapered surface 6 _b. Is equal to the distance r ₂ and is the maximum distance compared to other portions.

When the gyratory re-crusher 1 having the above-described structure is used for a long period of time, wear of the concave 6 progresses, and the thicknesses t ₁ and t ₄ of the worn portions shown by the diagonal lines in FIG. It becomes larger, and the remaining wall thickness becomes thicker toward the top. Therefore, when removing the worn concave 6 from the upper body 2, by loosening the nut 10 and removing the holding member 8 together with the bolt 9 from the inner peripheral portion of the upper body 2, the concave 6 is attached to the mounting hole 2 _a.
Taken from. Subsequently, the concave 6 is turned upside down, and is fitted and arranged from below in the mounting hole _2a . Then, in order to hold both tapered surfaces 6 _b and 6 _a of the concave 6 between the third tapered surface 7 of the mounting hole 2 _a and the fourth tapered surface 8 _a of the holding member 8, the holding member 8 is fixed by the bolt 9. It is attached to the upper body 2 by being pressed by the nut 10 and the first taper surface 6 _a of the concave 6 described above.
And the inner periphery of the mounting hole _2a . As a result, the holding member 8 bites into a wedge shape between the inner peripheral portion of the mounting hole 2 _a and the first tapered surface 6 _a of the concave 6, so that the concave 6 can be attached to the upper main body 2 even when it is turned upside down. It is firmly fixed. And the concave 6
Rotation within the mounting hole 2 _a is prevented by the detent key 11. In the concave 6 fixed by reversing,
Since the relatively thick wall portion is located at the bottom, it can be used further as long as its mechanical strength permits. Therefore, the concave 6 has a longer life than the conventional one, which contributes to the reduction of the running cost. In the above embodiment, the third tapered surface 7 may be provided below the inner peripheral portion of the mounting hole _2a , and the holding member 8 may be provided above the inner peripheral portion of the mounting hole _2a. is there. In this case, the third taper surface 7 and the second taper surface 6 _b of the concave 6, the fourth taper surface 8 _a of the holding member 8 and the first taper surface 6 _a of the concave 6 are fitted together. It goes without saying that the shape must be possible. Further, in the above embodiment, the distances r ₁ and r ₂ between the outermost ends 6 _c and 6 _{d of the} tapered surfaces 6 _a and 6 _b of the concave 6 and the machine center C are set to be equal to each other. Although the structure is simplified, the setting of the distances r ₁ and r ₂ is not limited to the above case.

Next, the cone cave 1 with the cone cave above and below
2 _a, is divided into 12 _b the Jai rate Li crusher 1
_a is shown in FIG. In this embodiment, the upper concave 1
The upper outer circumference of the 2 _a, is formed with a first tapered surface 6 _a ring-like which widens downward, the lower end outer peripheral portion of the concave 12 _b of the lower, upwardly widening the second tapered surface 6 _b annular with equal taper angle as the tapered surface 6 _a and is formed. Again, the previous embodiment as well as the distance and the machine center from the mechanical center to the outermost end of the first tapered surface 6 _a second tapered surface 6 _b
The distance to the outermost edge of is equal, and it is set to be the maximum distance in the whole. And the concave 12
The lower part of _a, a ring-shaped tapered face 12 _c which widened upward is formed. Also, concave 12 _b
At the upper part of the above, the taper surface 12 _c
Ring-shaped tapered surface 12 _d having a taper angle equal to
Are formed. These are formed so that the distance from the distance and the machine center from the machine center to the outermost edge 12 _e of the tapered surface 12 _c to the outermost end 12 _f of the tapered surface 12 _d is equal.

[0009] the vicinity of the upper portion of the lower and 12 _b of the concave 12 _a, in order to improve the holding force by the upper body 2 of this part, a ring-shaped tapered surface expanding upward is formed in the upper A holding member 13 having a bottom surface 13 _a and a ring-shaped tapered surface 13 _b which is formed in the lower portion and expands downward is provided detachably. The tapered surface 13 _a is formed to be fitted with the tapered surface 12 _c of the lower end outer peripheral portion of the concave 12 _a. Further, the tapered surface 13 _b is formed to be fitted with the tapered surface 12 _d of the concave 12 _b. Then, a bolt 14 and a nut 15 for attaching the holding member 13 to the upper body 2
By tightening, the holding member 13 bites into a wedge shape between the tapered surface 12 _c and the inner peripheral portion of the mounting hole 2 _a . Incidentally, the third tapered surface 7, the holding member 8, the fourth tapered surface 8 _a is similar to the previous embodiment. That is, in this embodiment, it is needless to say that the first to fourth all tapered surface 6 _a of, 6 _b, the taper angle of 7, 8 _a are set equal. The holding member 1
Concaves 12 _a fixedly attached to the upper body 2 by bolts 3, 8 and bolts 14, 9 and nuts 10, 15;
At 12 _b , wear causes the lower concave 12 _b to be thinner than the upper concave 12 _a . Therefore, after the concaves 12 _a and 12 _b are removed from the upper body 2 and are integrally turned upside down in the mounted state, the holding members 13 are inserted into the mounting holes 2 _a of the upper body 2 again.
It is attached and fixed via 8. In this fixed state, the concave 12a having _a large wall thickness is arranged on the lower side. Therefore, according to this embodiment, the same effect as that of the gyratory re-crusher 1 (FIG. 1) of the previous embodiment can be obtained.

[0010]

Since the present invention is constructed as described above, the concave can be reversed and used. Therefore, even if the lower portion of the concave portion is greatly thinned due to wear during use, it is possible to further use the portion with less thinning by the above-mentioned reversal by using the lower portion, thereby extending the life of the concave portion. Can be planned.
As a result, running costs can be reduced.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing a gyratory recrusher according to an embodiment of the present invention.

FIG. 2 is a longitudinal cross-sectional view of a main part showing a concave of a gyratory recrusher.

FIG. 3 is a vertical cross-sectional view showing a gyrate recrusher having a concave portion according to another embodiment of the present invention.

FIG. 4 is a vertical cross-sectional view showing a conventional gyratory recrusher.

5 is a state explanatory view showing a longitudinal cross-section of the wear pattern of the concave provided in the gyratory re-crusher shown in FIG.

[Explanation of symbols]

1, 1 _a , 1 _b ... Gyrate re-crusher 2 ... Upper body 2 _a ... Mounting hole 5 ... Mantle 6, 12 _a , 12 _b , 26 ... Concave 6 _a ... First taper surface 6 _b ... Second taper surface 7 ... third tapered surface 8 ... holding member 8 _a ... fourth tapered surface theta _1, theta ₂ ... taper angle

Claims (1)

(57) [Scope of utility model registration request] 1. A first tapered surface that expands downward is formed on the outer peripheral portion of a substantially cylindrical concave member that is vertically inserted and installed in a mounting hole inside the body, and the outer peripheral portion of the concave member is formed. A second taper surface that expands upwardly is formed below the first taper surface of the first taper surface, and a second taper surface that fits with the first or second taper surface of the concave is formed on the inner peripheral portion of the mounting hole. A holding member having a wedge-shaped cross section having a tapered surface of No. 3 and a fourth tapered surface fitted to the second or first tapered surface of the concave is detachably attached to the inner peripheral portion of the mounting hole. A third member, which is provided and is pressed so that the holding member bites between the outer peripheral portion of the concave portion and the inner peripheral portion of the mounting hole, and both tapered surfaces of the concave portion are formed on the inner peripheral portion of the mounting hole. The taper surface of and the fourth taper surface of the holding member. A rotary type crusher for crushing the supplied material by eccentrically rotating a substantially frustoconical mantle in the concave, and crushing the supplied raw material between the concave and the mantle by the above-mentioned first to fourth methods. The taper angles of all the tapered surfaces are set equal, and the first tapered surface is fitted with the third tapered surface.
Alternatively, the rotary crusher is characterized in that the second taper surface is set at a position to be fitted with the fourth taper surface when the concave is turned upside down.