JP2006322303A - Crusher - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problems that a crusher using two rotary crushers needs a large area on a horizontal plane and has difficulty in crushing an object into very fine pieces while coping with the size and hardness of the object, and that the technology for the method for crushing the object with a drum cutter and a fixed blade is insufficient to crush the object finely while coping with the kind of the object, though the mechanism does not need a large space in a horizontal direction, wherefore an improvement is desired. <P>SOLUTION: The crusher includes a rotary drum which has crushing blades arranged in a plurality of tiers and is placed in an inner frame for containing the object to be crushed. The crusher can crush the object sequentially from the upper part by the rotary crushing blades projecting from an outer peripheral surface of the drum and projections inside the inner frame. The crusher is particularly suitable for crushing an used sprue of a blast furnace. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention finely pulverizes processing materials used in construction, construction, etc., including stone, brick, asphalt, concrete, metal, plastic, etc. In particular, the present invention relates to an arm attachment type drum crushing machine of a power shovel.

Various inventions have been made for drum crushers, but a rotary crusher can be attached to a hydraulic excavator to produce a crushing work and a work efficiency that disperses and works to be crushed. ing. For example, Japanese Laid-Open Patent Publication No. 9-53252 discloses a pair of crushing teeth rotatably arranged on a bucket, and Japanese Laid-Open Patent Publication No. 2001-1932912 discloses a crushing on a side surface of a bucket body provided in a rotary crushing mechanism. Japanese Patent Application Laid-Open No. 10-331185 discloses a drum cutter in a frame that accommodates an object to be crushed. Has a fixed blade that alternately engages with a blade projecting on the outer peripheral surface of the drum cutter, and the drum cutter is rotationally driven by a hydraulic motor fixed to the frame. Has been.

  However, among these crushers, those using two rotary crushers require a large area in the horizontal plane, and it is difficult to make them extremely fine while accommodating the size and hardness of the object to be crushed. . Also, the method of crushing with a drum cutter and fixed blade does not take a large place in the horizontal direction from the top of the mechanism, but it is still insufficient as a technology to cope with the type of pulverized material and miniaturize, Improvement is desired.

  As a result of intensive studies in view of the above circumstances, the present invention is a crusher capable of expanding the types of objects to be crushed and achieving fine pulverization of a metal composite refractory material that has been impossible in the past. Is intended to provide.

JP-A-9-53252 JP-A-10-331185 JP 2001-1929212 A

Most of conventional crushers are mounted on a relatively small bucket and have one or two drum cutters provided so as to be rotatively pulverized, and finally the pulverized fine particles are at most. In many cases, about 40-50 mm, and when metal fine pieces are mixed by mistake, the pulverization is not performed smoothly, and the pulverization must be stopped for separation and removal. Since the size of the obtained fine particles is about 40 to 50 mm, further fine particle formation has been demanded upon reuse. In addition, despite the fact that the runway of the blast furnace is heavily consumed, refractory bricks and metal are complex, so if they are separated in advance and the metal is not removed, pulverization is impossible. Met.
The present invention includes concrete, asphalt, brick, and, in some cases, composites thereof, or composites of refractory bricks and metals used in the smelters of the blast furnace as described above, or those containing mud. It is an object of the present invention to provide a crusher that can be easily pulverized to those that have been difficult in the past as well as those that are suitable for pulverization, and that can be pulverized more finely than conventional pulverizers.

The present invention is a crusher that adopts a vertical three-dimensional crushing mechanism instead of the conventional flat crusher as a result of various studies to solve the above-described conventional technology.
That is, the invention of claim 1 is an attachment type crusher attached to an arm of a hydraulic excavator,
A basket-shaped inner frame of a truncated cone shape having a multistage fixed crushing blade on the inner surface fixed in the bucket;
A rotating drum provided inside the inner frame and rotated by a hydraulic motor fixed in the bucket, the upper surface of which is provided with a multistage crushing blade on the outer periphery of a drum having a dome and a cylindrical body;
A shielding plate that shields the space formed between the outer periphery of the upper surface of the inner frame and the bucket in a sealed state at the top;
The hydraulic motor is supported and fixed, and includes a base body having holes for passing crushed materials,
It is a crusher that can gradually crush as the material to be crushed from the upper part descends,

According to a second aspect of the present invention, the inner frame is configured in a basket shape by forming a space portion that can discharge crushed material in the outer peripheral direction by a plurality of rings, the plurality of rings, and a frame connecting the rings. The crusher according to claim 1, wherein

  According to a third aspect of the present invention, a crushed object dispersing protrusion is provided on the upper surface of the dome of the rotating drum, and a first stage crushing blade is provided on the outer periphery of the relatively small diameter barrel portion of the cylindrical portion. A second-stage crushing blade and a third-stage crushing blade are sequentially provided on the outer periphery of the relatively large-diameter barrel from the upper side, and a fourth protruding outward from the large-diameter barrel by the mounting plate. 3. A step crushing blade is provided, a fifth step (lowermost) crushing blade is provided on the upper surface of the flange, and the flange is further distributed on the circumference. The crusher described,

  Further, in the invention of claim 4, the crushing blade between the upper part of the drum and the third stage from the bottom of the drum has a shape, size and arrangement for the purpose of major division, and in the second stage from the bottom of the drum, The shape, size, and arrangement for the purpose of subdivision, with the crushing blade for subdivision being mounted on the flange-type receptacle of the object to be crushed, which can make the size of the object to be crushed uniformly at the bottom. The crusher according to any one of claims 1, 2, or 3,

  In the invention according to claim 5, the first stage crushing blade and the second stage crushing blade of the drum have sharp tips, and the distance between the fourth stage crushing blade and the fifth stage crushing blade is 40 mm or less. A crusher according to any one of claims 1, 2, 3 or 4,

  According to the sixth aspect of the present invention, a crushing assisting convex piece is attached to the inner upper portion of the inner frame in accordance with the attachment position of the crushing blade of the drum, and the inner frame side is provided between the third and fourth stages on the drum side. 6. A concave and convex flange is provided, and a bottom projecting piece that is detachably attached to the inner frame is attached under the concave and convex flange. It is a crusher in any one of.

  Further, in the invention of claim 7, the hydraulic motor is a one-way rotating type or a forward / reverse rotating type, and is driven by a hydraulic source provided in the hydraulic excavator, and the hydraulic motor is fixed to the bottom of the inner frame. The crusher according to any one of claims 1, 2, 3, 4, 5 or 6, wherein the rotating part of the motor is fixed to the rotating drum with a bolt.

  The invention according to claim 8 is a turning wheel having a bearing between the outer ring side and the inner ring side, and either one, for example, the outer ring side is fixed to the rotating drum, and the other one, for example, the inner ring side is fixed to the base by a bolt. It is a crusher according to any one of claims 1, 2, 3, 4, 5, 6 or 7,

  The invention of claim 9 is characterized in that the stage on which the drum is placed is fixed by welding the side surface to the bucket, and a hole for discharging the crushed material into the bucket is provided. The crusher according to any one of 3, 4, 5, 6, 7 or 8.

  In general, the present invention can efficiently pulverize a large amount of concrete, asphalt, brick, and optionally a composite thereof, or a composite containing a small amount of metal, which is suitable for pulverization. It was easy to cut the metal cylinder vertically, round it up, and pulverize the refractory brick at the same time, such as refractory bricks and metal cylinder composites of blast furnaces that were A pulverizer having a high level of pulverization capability is provided. For example, from 30 to 40 mm, it was fine to pulverize a hard material such as concrete to a slightly soft one, and a considerably large size material, that is, conventionally pulverize to a size of 40 to 50 mm. A pulverizer capable of pulverizing is provided.

  The present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing an outline of a main part of a hydraulic excavator used in the crusher of the present invention, FIG. 2 is a simplified explanatory diagram of an inner frame installed in the hydraulic excavator of FIG. 1, and FIG. 4 is a simplified explanatory view showing the assembly structure of the frame, FIG. 4 is an exploded perspective view showing the structure of the rotating drum installed in the hydraulic excavator of FIG. 1, and FIG. 5 is a view of the rotating drum and hydraulic motor of the crusher of the present invention. FIG. 6 is an explanatory side view showing the relationship between the rotating drum of the crusher of the present invention and the surrounding inner frame, and FIG. 7 is a view as seen from the upper surface of FIG.

The outline of the present invention is composed of an inner frame on the inner surface of the bucket and a drum that rotates inside the bucket, and the drum is provided with crushing blades in multiple stages. Even if it is scrap metal from the blast furnace runner, the metal cylinder is divided vertically at the upper part, then rolled into a small cylinder at the lower part and discharged. The refractory is made finer and discharged.
Note that a bracket 12 is attached to the frame and is coupled to an arm of a hydraulic excavator (not shown).

That is, the present invention is a crusher having an attachment type drum attached to an arm (not shown) of a hydraulic excavator as shown in FIG.
11 is a bucket, 12 is a bracket to be attached to a hydraulic excavator, 13 is a claw, and 14 is a plate material for fixing the inner frame. A partition plate insertion piece 15 of the inner frame and a lower partition plate insertion piece 16 attached thereto. Is provided. Reference numeral 18 denotes a shielding plate that covers a bucket space of a size that matches the circumference of the head of the rotating drum attached to the upper surface. Then, locking members 20 are provided on both sides of the fixing member 19 at the upper part where the partition plate as shown in FIG. 7 is inserted to support the load.

  2 and 3, a multistage ring 23 of the inner frame 22 fixed in the bucket has a large number of pieces 24 attached thereto, and the upper portion of the inner frame 22 is crushed on the inner surface side at an appropriate interval. The structure of a cage-shaped inner frame 22 having a truncated conical shape having projections 21 (providing a strong impact crushing effect on the object to be crushed corresponding to the crushing blade of the rotating drum) is shown. A large number of frames 24 are attached to the multi-stage ring 23 of the inner frame 22, particularly the second and lower rings 23, and crushing projections 21 are provided protruding inward at appropriate intervals. As shown in the separation diagram of FIG. 2, the bottom stage includes a large size detachable bottom crushing protrusion 21 -L which is uneven on the removable inner surface side which is screwed, and a small size detachable bottom crushing protrusion 21. Since the final particle size can be determined according to the purpose, it is formed so that it can be exchanged.

  FIG. 3 is a partial cross-sectional view showing a state in which the ring 23 of each step of the inner frame 22 is joined by the piece 24. The ring 23 of each step is provided in close contact with the outside of the top of the piece 24, and the lower end of the piece 24 Is provided so as to be positioned on the lower ring, and finally, a mesh-like void 25 as shown in FIG. 2 is provided. Further, as shown in FIG. 2, a partition plate 26 is provided on the upper surface of the ring at the upper end of the inner frame 22 at an appropriate interval to partition the ring 23 of each step on the side surface, and the bucket can be understood as shown in FIG. It is held at a predetermined position by being inserted and fixed to a partition plate insertion piece 15 provided inside the shielding portion and a partition piece fixing member 16 provided at a lower portion in the vertical direction.

  The object to be crushed (processed material) is discharged to the outside of the inner frame 22 in accordance with the particle size from the cage-like space 25 formed by the combined state of the tops 24 of the rings 23 of each stage. Since it does not need to be crushed, it is directly discharged from the cage-like space 25 to the outside. Then, the pulverized material passes through the outer side of the inner frame 22 without passing through the pulverizing mechanism and flows down to the lower part, and the object to be pulverized becomes gradually finer and is discharged to the outside from the cage-like space. The desired fine particles can be passed through the outside of the inner frame 22 and allowed to flow down to the lower part, so that the efficiency of grinding can be increased, and the connection of the ring 23 of each stage 23 by the top 24 can be used for concrete grinding. When such an object to be crushed collides with the surroundings at the crushing stage, it is not a crushing blade, but has an effect of crushing withstanding an impact.

  FIG. 4 is an exploded perspective view of a rotating drum, a hydraulic motor, and a mounting member installed inside the inner frame. The rotating drum 33 has an upper surface that is a dome 31 and a body portion that is an outer periphery of a relatively small diameter body portion 35. Are provided with a first crushing blade 32a, a relatively large-diameter barrel 36 with a second crushing blade 32b, and a third crushing blade 32c. A fourth stage crushing blade 32d attached to the upper side of dx is provided.

According to the above, the outer flange 39-o is provided at the bottom of the rotating drum 33, and as can be understood from FIGS. 5 and 6, the swivel wheel 40 has a rotating side 40a, a fixed side 40b, and an intermediate portion. The flange 39-o is coupled to the rotating side 40a of the swivel wheel by a bolt. A hydraulic motor 38 is inserted into the large-diameter body portion 36 of the rotary drum 33. 5 and 6, the hydraulic motor is composed of a hydraulic motor rotating side 38u, a hydraulic motor fixed side 38d, and a hydraulic pipe mounting portion 38o immediately below the hydraulic motor rotating side 38u. A mounting flange 41 is provided on the outer periphery of the lower end, and is connected to an internal flange 39-i provided in the large-diameter body portion 36 of the rotary drum 33 with a bolt.
In this way, the rotation of the hydraulic motor freely turns on the rotation side of the turning wheel to rotate the rotating drum.

On the other hand, as shown in FIG. 4, the fastener 44 of the holding body 45 is provided with double inner and outer screw holes 43 in a ring shape, and the bolts passing through the inner screw holes are fixed to the fixing portion 38 d of the hydraulic motor. The bolt that is inserted into and fixed to the screw hole provided on the lower surface of the rotating wheel and passes through the outer screw hole is inserted into the screw hole on the fixed side 40b of the swivel wheel 40 and fixed. 46 is a hole for discharging the pulverized material.
Further, as clearly shown in FIG. 5 showing the relationship between the rotating drum and the hydraulic motor and FIG. 6 showing the relationship between the inner frame and the rotating drum, the inner side is slightly above the bottom of the large-diameter barrel of the rotating drum. Directional flanges 39-i are provided. A holding body 45 for supporting and fixing the hydraulic motor 38 and having a hole 40 for passing crushed material is shown. And it is the grinder which grind | pulverizes the to-be-crushed material thrown in from the upper part, and can grind | pulverize gradually as it descends.

  According to the above structure, the rod-like body 34 extending in the radial direction from the top of the dome 31 of the rotating drum 33 is provided, and when the object to be crushed is introduced from above, the rotating drum 33 is evenly distributed around the periphery. Can be made.

  The upper part of the rotary drum 33 is a relatively small-diameter barrel 35, and a first stage crushing blade 32a is provided around the rotary drum 33, and a relatively large-diameter barrel 36 is provided below the rotary drum 33. A second-stage crushing blade 32b and a third crushing blade 32c are provided, and further, a lower-stage fourth-stage blade 32d attached to the upper side of the diameter-expansion spacer member 37, and a lower-side fifth blade. Since the stage crushing blade 32e is provided, the objects to be crushed can be crushed sequentially.

  A rotating wheel 40 having a ball bearing 40c shown in FIG. 5 is bolted to the lowermost surface of the rotating drum 36 at the lower part of the rotating drum 36 in FIG. 38 is inserted. A rotating flange 41 for attachment to the rotating drum 36 is provided around the rotating portion 38u of the hydraulic motor. The hydraulic motor 38 has a hydraulic motor fixing portion 38d. A hydraulic pipe mounting portion 36o for hydraulic ON and OF is provided at a lower portion of the hydraulic motor 38, and a swivel wheel 40 and a mounting portion are provided at the lowermost portion. A holding body 45 attached with a stopper 44 having an opening at the center having a screw hole 43 for connecting and holding the flange 41 is fixed to the bucket, and the motor and rotating drum supported thereby are firmly held. It is supposed to do. The holding body 45 to which the metal fitting 44 is attached is provided with holes 46 for passing pulverized material on both sides of the metal fitting 44.

The above configuration can be easily understood from FIGS. 5, 6 and 7. FIG. That is, FIG. 5, FIG. 6 and FIG. 7 can easily understand the positional relationship between the inner frame 22 provided in the bucket 11 and the rotating drum inside thereof, and the relationship between the crushing blades attached thereto.
It should be understood that the same reference numerals are given to the same parts shown here. The inner frame is provided with a crushing protrusion 21 at a predetermined position of the ring 23, and at the lowermost part, detachable fixing protrusions 21-L and 21-S are provided on the lower surface of an uneven flange (partition plate). Is provided. Further, the rotary drum 33 is provided with crushing blades in five stages from the top so that crushing according to the purpose can be performed.

  The gap between the inner frame 22 and the rotating drum 33 is appropriately determined in consideration of the type of the object to be crushed or the size of the particles obtained by pulverization. Further, the inner frame 22 is configured in consideration of the fact that the object to be crushed is large in the horizontal direction, for example, in the upper part, and becomes smaller as it reaches the lower part. Further, the shielding plate 18 is usually provided with an inclination in the central direction so that it can be easily fed by gravity to the portion to be crushed. The uppermost protrusion 21 of the inner frame 22 limits the size of the material to be crushed, reduces the load on the rotating drum due to the large amount of material to be crushed, and smooth crushing. Can be realized.

In the crusher according to the present invention as described above, the material to be crushed from above is introduced directly into the inner frame 22 or guided by the shielding plate. At that time, the object to be crushed charged near the center of the inner frame 12 collides with the rod-like body 34 at the top of the rotating drum 33 that rotates in accordance with the rotation of the rotating drum 33 to cause the object to be crushed in the inner frame 22. Can be lowered in the inner frame 22 without being biased to one direction. A crushing protrusion on the inner frame side so that the object to be crushed in the inner frame 22 is positioned between the fourth crushing blade and the fifth crushing blade provided on the rotating rotary drum 33. 22d is attached from below by a flange-like support 22e so that the shape and degree of crushing of the object to be crushed can be regulated.
The object to be crushed charged near the center of the rotary drum 33 is a crushing blade 32a, 32b, 32c, 32d provided on the side circumference of the small-diameter barrel 35 and the large-diameter barrel 36 of the rotary drum 33, or an inner frame. It can be crushed by colliding with an inner piece 24 of 22, a crushing projection 21 provided appropriately, or the like.

As shown in FIG. 6 and the like, the crushing of the object to be crushed is a large one of the crushing blades 32 provided on the side periphery of the rotating drum 33 that has the inner frame 22 in a reverse truncated cone shape and further rotates. The crushing blade provided on the side periphery of the rotating drum 33 that rotates and the coma blade provided inside the inner frame 22 and the projection provided appropriately, By making the space | interval with 22 wide on the upper side from the downward direction, it can crush efficiently in the suitable position in the inner frame 22 by the magnitude | size of the outer diameter of a to-be-crushed object. That is, a relatively large crushed object is crushed above the input side of the object to be crushed in the inner frame 22, and a relatively small crushed object including a crushed object that has been crushed and reduced in the lower part. The object to be crushed having a target particle size is discharged to the outside through the stitch-like void 25 of the inner frame 22 and the lowermost gap of the inner frame 22 through the hole at the bottom of the bucket 11. The Rukoto.
In particular, when the first stage crushing blade and the second stage crushing blade are formed at an acute angle, the metal cylinder existing in the waste material of the runner of the blast furnace is cut in the vertical direction and rounded into a rod shape when pulverized. In particular, by setting the distance between the 4th stage crushing blade and the 5th stage crushing blade to 40 mm or less, it becomes a thin and short metal rod, and is discharged as a shape that can be easily separated from other refractory bricks and other crushed materials. can do.

  The situation where the inner frame 22 and the small-diameter barrel 35 and the large-diameter barrel 36 of the rotary drum 33 are firmly fixed to the bucket is as understood from the description of the drawings already shown. This rotation is also smoothly driven by the action of the hydraulic motor 38 driven by the hydraulic mechanism, but in particular, it can be smoothly turned by the action of the turning wheel 40. The pulverized material finally goes to the bottom of the bucket, but if a hole is made in the bottom, it is discharged from here.

  INDUSTRIAL APPLICABILITY The present invention can be used for waste processing associated with the dismantling of roads and other structures, and for miniaturization processing of wastes at factory production sites.

The perspective view which shows the outline of the principal part of the hydraulic shovel used for the crusher of this invention. FIG. 2 is an exploded perspective view showing a structure of an inner frame installed in the hydraulic excavator of FIG. 1. The simplified explanatory drawing which shows the assembly structure of the longitudinal cross-section direction of an inner frame. FIG. 2 is an exploded perspective view showing a structure of a rotating drum installed in the hydraulic excavator of FIG. 1. Explanatory drawing which shows the relationship between the rotating drum of the crusher of this invention, and a hydraulic motor. Side surface explanatory drawing which shows the relationship between the rotating drum of the crusher of this invention, and the surrounding inner frame. The figure seen from the upper surface of FIG.

Explanation of symbols

11 Bucket 12 Bracket 13 Claw 14 Plate material for fixing the inner frame 15 Partition plate insertion piece 16 for the inner frame 16 Partition plate insertion piece 17 Partition piece fixing member 18 Shield plate 19 Fixing member 20 Locking member 21 Crushing protrusion 21-L Large size detachable crushing blade 21-S Small size detachable crushing blade 22 Inner frame 22d Inner frame projection 22e 22d support flange 23 Ring 24 Frame 25 Mesh-like void 26 Partition plate 31 Dome 32a First stage crush Blade 32b Second stage crushing blade 32c Third stage crushing blade 32d Fourth stage crushing blade 32e Fifth stage crushing blade 32d-x Mounting stage for fourth stage crushing blade 33 Rotating drum 34 Rod-shaped body 35 Small diameter Body 36 Large diameter body 36o Outer flange 36i at the lower end of the large diameter body 36i Large diameter Internal flange 37 Expanding spacer member 38 Hydraulic motor 38u Hydraulic motor rotating portion 38d Hydraulic motor fixing portion 38p Hydraulic motor hydraulic pipe mounting portion 39-o Flange 39-i Flange 40 Turning wheel 40a Turning wheel rotation Side 40b Rotating wheel fixed side 40c Ball bearing 41 Flange for mounting 42 Flange screw hole 43, 44 Double screw hole for holding plate bracket 45 Stopper bracket 45 Base 46 Ejection hole

Claims (9)

An attachment type crusher attached to the arm of a hydraulic excavator,
A basket-shaped inner frame of a truncated cone shape having a multistage fixed crushing blade on the inner surface fixed in the bucket;
A rotating drum provided inside the inner frame and rotated by a hydraulic motor fixed in the bucket, the upper surface of which is provided with a multistage crushing blade on the outer periphery of a drum having a dome and a cylindrical body;
A shielding plate that shields the space formed between the outer periphery of the upper surface of the inner frame and the bucket in a sealed state at the top;
The hydraulic motor is supported and fixed, and includes a base body having holes for passing crushed materials,
A crusher capable of gradually pulverizing the material to be crushed from the top as it descends.   The inner frame is formed in a cage shape by forming a space part capable of discharging crushed material in the outer peripheral direction by a plurality of rings, the plurality of rings, and a frame connecting the rings. The crusher according to claim 1.   On the upper surface of the dome of the rotating drum, there is provided a projecting piece for dispersing the object to be crushed, the first stage crushing blade is provided on the outer periphery of the relatively small-diameter dome body, and the relatively large-diameter body on the lower part thereof. A second-stage crushing blade and a third-stage crushing blade are sequentially provided on the outer periphery from the upper side, and a fourth-stage crushing blade protruding outward from the large-diameter body is provided by a mounting plate. The crusher according to claim 1, wherein a crushing blade of a fifth stage (lowermost part) is provided on the upper surface of the crusher.   The crushing blades from the top of the drum to the third stage from the bottom of the drum are shaped, sized and arranged for the major division, and the second stage from the bottom of the drum is shaped and sized for the minor division. The crushing blade for chopping is attached to the bottom of the flange-type receptacle of the object to be crushed so that the size of the object to be crushed can be made uniform at the lowermost stage. 4. The crusher according to any one of 3.   The first-stage crushing blade and the second-stage crushing blade of the drum have sharp tips, and the distance between the fourth-stage crushing blade and the fifth-stage crushing blade is 40 mm or less. The crusher according to any one of 2, 3, and 4.   According to the mounting position of the crushing blade of the drum, a crushing assisting convex piece is attached to the inner upper part of the inner frame, and a concave and convex flange is provided on the inner frame side between the 4th and 5th crushing blades on the drum side. 6. A convex piece that is provided and is attached to the inner frame under the concave and convex flange so as to be fixed at the lowermost stage, and is attached to the inner frame. Crusher.   The hydraulic motor is a one-way rotating type or a forward / reverse rotating type, and is driven by the hydraulic pressure provided on the hydraulic excavator, with the hydraulic motor fixed part at the bottom of the bucket and the hydraulic motor rotating part at the rotating drum. The crusher according to claim 1, wherein the crusher is fixed with a bolt.   A turning wheel having a bearing between an outer ring side and an inner ring side, wherein the outer ring side is fixed to a rotating drum and the inner ring side is fixed to a base. The crusher according to any one of 5, 6, and 7.   The base on which the drum is placed is fixed by welding the side surface to the bucket, and a hole for discharging the crushed material into the bucket is provided. , 7 or 8 crusher.

Images