CN214599509U - Four-shaft crusher - Google Patents

Abstract

The utility model discloses a four-axis breaker, include: the crushing device comprises a rack, four cutter shafts, a driving device, a first side plate and a locking assembly, wherein a crushing box body is arranged on the rack, and an opening is formed in an inner cavity of the crushing box body; the four cutter shafts are arranged in the crushing box body, a plurality of cutter discs are sleeved on the cutter shafts, and all the cutter discs are arranged along the length direction of the cutter shafts; the driving device is arranged on one side of the crushing box body, is connected with the cutter shaft and can drive the cutter shaft to rotate; the first edge plate is detachably arranged on the other side of the crushing box body, the first edge plate can cover the opening, the first edge plate is provided with a containing groove, a bearing is arranged in the containing groove, and the bearing is correspondingly matched with the cutter shaft; the locking assembly is detachably arranged on the first side plate and can lock the bearing in the accommodating groove. The utility model provides a four-axis breaker can conveniently dismantle, maintain and change the blade disc.

Description

Four-shaft crusher

Technical Field

The utility model relates to a crushing equipment technical field, in particular to four-axis breaker.

Background

In some conventional four-shaft crushers, a cutter shaft is arranged in a crushing box body, a bearing is arranged on the cutter shaft, a side plate and a bearing hole of the crushing box body are divided into an upper half and a lower half, a cutter disc and the bearing are preassembled on the cutter shaft, then the cutter shaft is arranged in the crushing box body in a hoisting mode, the bearing is matched with the bearing hole of the lower side plate, and finally the upper side plate is fixedly matched with the lower side plate. In a similar way, the cutter head on the cutter shaft is required to be disassembled, the upper edge plate is also required to be disassembled, and then the whole cutter shaft is lifted, so that the cutter head can be disassembled. Therefore, the existing four-shaft crusher is troublesome to the operations of disassembling, replacing, maintaining and the like of the cutter head.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a four-axis crusher can conveniently dismantle the blade disc.

According to the utility model discloses four-axis breaker, include: the crushing device comprises a rack, four cutter shafts, a driving device, a first side plate and a locking assembly, wherein a crushing box body is arranged on the rack, and an opening is formed in an inner cavity of the crushing box body; the four cutter shafts are arranged in the crushing box body, a plurality of cutter discs are sleeved on the cutter shafts, and all the cutter discs are arranged along the length direction of the cutter shafts; the driving device is arranged on one side of the crushing box body, is connected with the cutter shaft and can drive the cutter shaft to rotate; the first edge plate is detachably arranged at the opening and can cover the opening, an accommodating groove is formed in the first edge plate, a bearing is arranged in the accommodating groove, and the bearing is correspondingly matched with the cutter shaft; the locking assembly is detachably arranged on the first side plate and can lock the bearing in the accommodating groove.

According to the utility model discloses four-axis breaker has following beneficial effect at least: when the cutter head is to be disassembled, the locking assembly is firstly disassembled and separated from the first side plate, then the bearing is disassembled from the containing groove, finally the first side plate is separated from the crushing box body, the opening of the crushing box body is opened, the cutter head can be conveniently disassembled from the cutter shaft, the worn cutter head is pertinently replaced, maintained and the like, the cutter shaft is not required to be hoisted, and the maintenance convenience of the four-shaft crusher is improved.

According to some embodiments of the present invention, the driving device includes a first motor and a second motor, the first motor and the motor are both located at one side of the crushing box body away from the first sideboard, an output shaft of the first motor is provided with a first driving gear, wherein two of the knife shafts are both provided with a first driven gear, and the first driving gear is respectively engaged with the two first driven gears; and the output shaft of the second motor is provided with a second driving gear, the other two cutter shafts are provided with second driven gears, and the second driving gears are respectively meshed with the two second driven gears. Because the first motor and the second motor are both positioned at the same side of the crushing box body, the disassembly and the assembly of the first side plate cannot be interfered, so that the disassembly and the assembly of the cutter head are convenient; the first motor simultaneously distributes power to two of the cutter shafts, and the second motor simultaneously distributes power to the other two cutter shafts, so that the power distribution layout of the motors is more reasonable, energy is saved, and the two of the cutter shafts and the other two cutter shafts can rotate in opposite directions, and therefore objects to be crushed above the cutter shafts are effectively crushed.

According to the utility model discloses a some embodiments, the locking subassembly includes the locking cover, the holding tank runs through first sideboard, the tip warp of arbor the holding tank stretches out outside the broken box, the locking cover is established and is fixed in the tip of arbor, the locking cover can be right the inner circle extrusion of bearing to carry out axial locking to the bearing, make the bearing be located the holding tank and be difficult for breaking away from, owing to be the inner circle extrusion to the bearing, so can not interfere the relative rotation of bearing inner and outer lane, guarantee that the bearing can normal function.

According to some embodiments of the utility model, the locking cover pass through the fastener with the tip fixed connection of arbor through the locking fastener, makes the locking cover remove toward the direction at bearing place along the axial of arbor to realize locking and the extrusion of locking cover to the bearing.

According to some embodiments of the utility model, the locking subassembly still includes the packing ring, the packing ring cover is located the arbor, the packing ring is located the locking cover with between the bearing, a terminal surface of packing ring with the locking cover butt, another terminal surface of packing ring with the inner circle butt of bearing, the inside extruded in-process of locking cover, earlier with the packing ring contact, then the packing ring extrudees the inner circle of bearing, and the packing ring can increase the area of contact between locking cover and the bearing, reduces the two pressure to can protect the difficult impaired of bearing.

According to some embodiments of the utility model, the terminal surface of locking cover is equipped with the concave edge in location, the lateral wall on the concave edge in location with the lateral wall cooperation of packing ring. Through setting up the concave edge of location, make the locking cover implement radial positioning through the concave edge of location and packing ring, the locking cover is difficult for rocking in footpath to make things convenient for the assembly and the fixed of locking cover.

According to some embodiments of the utility model, the inboard of first sideboard is equipped with first guard ring, first guard ring with first sideboard fixed connection, the inner endwall of first guard ring is equipped with the ring channel, the cover is equipped with the second guard ring on the arbor, the second guard ring is equipped with first bulge loop, first bulge loop with the cooperation is established to the ring channel insert, the second guard ring with first guard ring can rotate relatively. The first protection ring is used for protecting the bearing, and impurities in the crushing box body are difficult to permeate into the bearing along the cutter shaft; the second protective ring is also used for protecting the bearing, so that impurities in the crushing box body are prevented from permeating into the bearing along the side wall of the first side plate; and first bulge loop forms to insert with the ring channel and establishes the cooperation, makes to form tortuous winding clearance between the lateral wall of first bulge loop and the lateral wall of ring channel, avoids the infiltration bearing in the impurity in the broken box from the clearance between first guard ring and the second guard ring to provide multiple protection to the bearing, improve the life of bearing.

According to some embodiments of the utility model, still be equipped with the second bulge loop on the second guard ring, the second bulge loop is worn to locate first guard ring with first curb plate and with the inner circle butt of bearing makes impurity in the broken box be difficult to permeate the bearing in the clearance of the inner circle of bearing and second guard ring.

According to the utility model discloses a some embodiments still include the second sideboard, be equipped with on the second sideboard with the second guard ring corresponds the hole of dodging that sets up, dodge the hole with the cooperation is established to the second guard ring insertion, first guard ring is located first sideboard with between the second sideboard, the second sideboard can bear the second guard ring on the one hand, and on the other hand can block to a certain extent that impurity removes to the lateral wall of first sideboard, and is setting up the bearing in the first sideboard, so can protect the bearing not receive impurity infiltration to a certain extent.

According to the utility model discloses a some embodiments, first sideboard pass through the fastener with broken box fixed connection makes first sideboard and broken box can stabilize and be connected to can realize the cooperation of dismantling of first sideboard and broken box.

According to some embodiments of the utility model, adjacent two the range upon range of staggered arrangement of blade disc of arbor makes the breaker have the shearing action when broken object, improves crushing efficiency and quality.

According to some embodiments of the utility model, still include the dust cover, the dust cover is located the outside of first sideboard, the locking subassembly with the bearing is located the inner chamber of dust cover, through setting up the dust cover, on the one hand from the outside protection bearing of first sideboard and locking subassembly not infected by the dust, on the other hand, because the locking subassembly is fixed in the arbor, can follow the arbor and rotate, so the dust cover can protect personnel can not touch the locking subassembly when the machine operation to the security of four-axis breaker has been improved.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic view of a four-shaft crusher according to an embodiment of the present invention;

fig. 2 is an exploded schematic view of the four-shaft crusher shown in fig. 1;

fig. 3 is a side sectional view of the four-shaft crusher shown in fig. 1;

fig. 4 is a top sectional view of the four-shaft crusher shown in fig. 1;

fig. 5 is an enlarged schematic view of the region a shown in fig. 4.

Reference numerals:

the crusher comprises a frame 100, a crushing box body 200, an opening 210, a first motor 310, a first driving gear 311, a first driven gear 312, a second motor 320, a second driving gear 321, a second driven gear 322, a first side plate 410, a containing groove 411, a bearing 412, a second side plate 420, a cutter shaft 500, a cutter head 510, a locking assembly 600, a locking cover 610, a positioning concave edge 611, a gasket 620, a dust cover 630, a first guard ring 710, an annular groove 711, a second guard ring 720, a first convex ring 721 and a second convex ring 722.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, a plurality of means are one or more, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

As shown in fig. 1 and 2, the four-shaft crusher according to the embodiment of the present invention comprises: the crushing device comprises a frame 100, four cutter shafts 500, a driving device, a first side plate 410 and a locking assembly 600, wherein the frame 100 is provided with a crushing box body 200, and an inner cavity of the crushing box body 200 is provided with an opening 210; the four cutter shafts 500 are arranged in the crushing box body 200, a plurality of cutter heads 510 are sleeved on the cutter shafts 500, and all the cutter heads 510 are arranged along the length direction of the cutter shafts 500; the driving device is arranged on one side of the crushing box body 200, is connected with the cutter shaft 500 and can drive the cutter shaft 500 to rotate; the first side plate 410 is detachably arranged at the opening 210, the first side plate 410 can cover the opening 210, the first side plate 410 is provided with an accommodating groove 411, a bearing 412 is arranged in the accommodating groove 411, and the bearing 412 is correspondingly matched with the cutter shaft 500; the locking assembly 600 is detachably disposed on the first side plate 410, and the locking assembly 600 can lock the bearing 412 in the receiving groove 411.

Specifically, when the cutter head 510 is to be disassembled, the locking assembly 600 is firstly disassembled and separated from the first side plate 410, then the bearing 412 is disassembled from the accommodating groove 411, finally the first side plate 410 is separated from the crushing box body 200, so that the opening 210 of the crushing box body 200 is opened, the cutter head 510 can be conveniently disassembled from the cutter shaft 500, the worn cutter head 510 can be purposefully replaced and maintained, the cutter shaft 500 does not need to be hoisted out, and the maintenance convenience of the four-shaft crusher is improved.

Each cutter shaft 500 is provided with at least one cutter disc 510, the cutter discs 510 on different cutter shafts 500 are sheared mutually, the lowest shearing and crushing can be met, the cutter discs 510 can be set to be in reasonable corresponding quantity according to requirements, and the cutter discs 510 can be understood by those skilled in the art and are not limited herein.

In some embodiments of the present invention, the driving device includes a first motor 310 and a second motor 320, the first motor 310 and the motors are both located at a side away from the first side plate 410, an output shaft of the first motor 310 is provided with a first driving gear 311, wherein two cutter shafts 500 are both provided with first driven gears 312, and the first driving gear 311 is respectively engaged with the two first driven gears 312; the output shaft of the second motor 320 is provided with a second driving gear 321, the other two cutter shafts 500 are provided with second driven gears 322, and the second driving gear 321 is respectively engaged with the two second driven gears 322. Since the first motor 310 and the second motor 320 are both located on the same side of the crushing box 200, the first side plate 410 is not interfered with, and the cutter head 510 is convenient to disassemble and assemble; the first motor 310 simultaneously distributes power to two of the cutter shafts 500, and the second motor 320 simultaneously distributes power to the other two cutter shafts 500, so that the power distribution layout of the motors is more reasonable, energy is saved, and the two of the cutter shafts 500 and the other two cutter shafts 500 can rotate in opposite directions, thereby effectively crushing the objects to be crushed above the cutter shafts 500.

Specifically, in the above embodiment, as shown in fig. 3, in one side of the crushing box 200, the output shaft of the first motor 310 drives the first driving gear 311 to rotate counterclockwise, and the first driving gear 311 drives the two first driven gears 312 to rotate clockwise, so that the two knife shafts 500 connected with the first motor 310 rotate clockwise; in the other side of the crushing box 200, the output shaft of the second motor 320 drives the second driving gear 321 to rotate clockwise, and the first driving gear 311 drives the second driven gear 322 to rotate counterclockwise, so that the two cutter shafts 500 connected to the second motor 320 rotate counterclockwise. Four cutter shafts 500 top equipped with blade disc 510 have connected into the bearing area that can bear the broken material of area, and this bearing area compares common biax breaker, and bearing area is bigger, and the suitability is stronger. When placing the material of treating broken at the top of broken box 200, along with arbor 500's rotation, no matter which position of material at bearing area, treat that broken material all can be taken to broken box 200 in the middle of, finally cut, broken by blade disc 510 on two middle arbor 500, broken material falls out from the feed opening that the bottom of broken box 200 set up, accomplishes crushing process.

It is contemplated that in other embodiments, the driving device may include four motors corresponding to the four knife shafts 500, so that the four knife shafts 500 can rotate individually, thereby flexibly controlling the rotation direction and the rotation speed of each knife shaft 500.

In addition, in some embodiments, a reduction gear box is arranged between the motor and the output shaft of the motor, and is used for improving the torque of the output shaft.

In some embodiments of the utility model, as shown in fig. 2, locking subassembly 600 includes locking cover 610, holding tank 411 runs through first curb plate 410, the tip of arbor 500 stretches out crushing box 200 through holding tank 411 outside, the tip that is fixed in arbor 500 is established to locking cover 610 cover, locking cover 610 can be to the inner circle extrusion of bearing 412, thereby carry out axial locking to bearing 412, make bearing 412 be located holding tank 411 and be difficult for breaking away from, owing to be to the inner circle extrusion of bearing 412, so can not interfere the relative rotation of the interior outer lane of bearing 412, guarantee that bearing 412 can normal operating.

In some embodiments of the present invention, the locking cover 610 is fixedly connected to the end of the arbor 500 by a fastener, and the locking fastener is used to move the locking cover 610 toward the bearing 412 along the axial direction of the arbor 500, so as to lock and squeeze the bearing 412 by the locking cover 610. The fastening member may be a common bolt, a common screw, or the like, and a fixing hole through which a rod portion of the bolt passes is formed in the locking cover 610, and an end portion of the arbor 500 is disposed in a threaded hole in which the bolt is threadedly engaged, so that the locking cover 610 is fastened by the bolt, and the bearing 412 can be pressed inward by the locking cover 610, and the bearing 412 is locked in the accommodating groove 411.

In some embodiments of the present invention, the locking assembly 600 further includes a washer 620, the knife shaft 500 is located by the washer 620, the washer 620 is located between the locking cover 610 and the bearing 412, an end surface of the washer 620 abuts against the locking cover 610, another end surface of the washer 620 abuts against the inner ring of the bearing 412, the locking cover 610 contacts with the washer 620 in the inward extrusion process, then the washer 620 extrudes the inner ring of the bearing 412, the washer 620 can increase the contact area between the locking cover 610 and the bearing 412, and the pressure of the two is reduced, so that the bearing 412 is protected from being damaged easily.

In some embodiments of the present invention, as shown in fig. 4 and 5, the end surface of the locking cover 610 is provided with a positioning concave edge 611, and the side wall of the positioning concave edge 611 is engaged with the outer side wall of the washer 620. Through the arrangement of the positioning concave edge 611, the locking cover 610 can be radially positioned through the positioning concave edge 611 and the washer 620, and the locking cover 610 is not prone to shaking in the radial direction, so that the locking cover 610 is convenient to assemble and fix.

In some embodiments of the present invention, as shown in fig. 2 and 5, the inner side of the first side plate 410 is provided with a first guard ring 710, the first guard ring 710 is fixedly connected to the first side plate 410, the inner end wall of the first guard ring 710 is provided with an annular groove 711, the knife shaft 500 is sleeved with a second guard ring 720, the second guard ring 720 is provided with a first protruding ring 721, the first protruding ring 721 is inserted into the annular groove 711 and is engaged with the annular groove 711, and the second guard ring 720 and the first guard ring 710 can rotate relatively. The first protection ring 710 is used for protecting the bearing 412, and impurities in the crushing box body 200 are difficult to permeate into the bearing 412 along the cutter shaft 500; the second protection ring 720 is also used for protecting the bearing 412 from impurities in the crushing box body 200 penetrating into the bearing 412 along the side wall of the first edge plate 410; the first protruding ring 721 and the annular groove 711 are inserted and matched, so that a zigzag gap is formed between the side wall of the first protruding ring 721 and the side wall of the annular groove 711, and impurities in the crushing box body 200 are prevented from permeating into the bearing 412 from the gap between the first protection ring 710 and the second protection ring 720, so that multiple protection is provided for the bearing 412, and the service life of the bearing 412 is prolonged.

Further, in some embodiments of the present invention, the second guard ring 720 is further provided with a second protruding ring 722, the second protruding ring 722 is disposed through the first guard ring 710 and the first edge plate 410 and abuts against the inner ring of the bearing 412, so that the impurities in the crushing box 200 are difficult to penetrate into the bearing 412 from the gap between the inner ring of the bearing 412 and the second guard ring 720.

Further, the utility model discloses an in some embodiments, still include second sideboard 420, be equipped with the hole of dodging that corresponds the setting with second guard ring 720 on the second sideboard 420, dodge the hole and insert with second guard ring 720 and establish the cooperation, first guard ring 710 is located between first sideboard 410 and the second sideboard 420, second sideboard 420 can bear second guard ring 720 on the one hand, on the other hand can block impurity to a certain extent and remove to the lateral wall of first sideboard 410 on, and the bearing 412 has been set up in the first sideboard 410, so can protect bearing 412 not by impurity infiltration to a certain extent.

In some embodiments, one end surface of the second guard ring 720 abuts against the cutter disc 510 on the cutter shaft 500, and the other end surface abuts against the inner ring of the bearing 412 through the second protruding ring 722, so that the second guard ring 720 is stably positioned and can rotate along with the cutter shaft 500.

In some embodiments of the present invention, the first side plate 410 is fixedly connected to the crushing box 200 by a fastener, so that the first side plate 410 can be stably connected to the crushing box 200, and the detachable connection between the first side plate 410 and the crushing box 200 can be realized. In a similar way, the fastener of setting on first sideboard 410 also can be accessories such as common bolt, screw and nut, compares in common breaker, and the welding links to each other between sideboard and the sideboard and forms broken box 200, perhaps bends the mode that forms broken box 200 through the panel beating, and the demand of changing blade disc 510 can be satisfied in first sideboard 410 detachable mode to dismantle fast.

In some embodiments of the present invention, the cutter discs 510 of two adjacent cutter shafts 500 are stacked and staggered, so that the crusher can cut objects and improve the crushing efficiency and quality.

In some embodiments of the utility model, still include dust cover 630, the outside of first curb plate 410 is located to dust cover 630, and locking subassembly 600 and bearing 412 are located the inner chamber of dust cover 630, through setting up dust cover 630, on the one hand from the outside protection bearing 412 of first curb plate 410 and locking subassembly 600 not infected by the dust, on the other hand, because locking subassembly 600 is fixed in arbor 500, can follow arbor 500 and rotate, so dust cover 630 can protect personnel can not touch locking subassembly 600 when the machine operation to the security of four-axis crusher has been improved.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The present embodiment has been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above-described embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the present invention.

Claims (10)

1. A four-shaft crusher, comprising:

the crusher comprises a rack (100), wherein a crushing box body (200) is arranged on the rack (100), and an opening (210) is formed in an inner cavity of the crushing box body (200);

the four cutter shafts (500) are arranged in the crushing box body (200), a plurality of cutter heads (510) are sleeved on the cutter shafts (500), and all the cutter heads (510) are arranged along the length direction of the cutter shafts (500);

the driving device is arranged on one side of the crushing box body (200), is connected with the cutter shaft (500) and can drive the cutter shaft (500) to rotate;

the first side plate (410) is detachably arranged at the opening (210), the first side plate (410) can cover the opening (210), an accommodating groove (411) is formed in the first side plate (410), a bearing (412) is arranged in the accommodating groove (411), and the bearing (412) is correspondingly matched with the cutter shaft (500);

the locking assembly (600), locking assembly (600) detachably locates on first sideboard (410), locking assembly (600) can with bearing (412) lock in holding tank (411).

2. The four-shaft crusher of claim 1,

the driving device comprises a first motor (310) and a second motor (320), the first motor (310) and the second motor are both positioned on one side, away from the first side plate (410), of the crushing box body (200), an output shaft of the first motor (310) is provided with a first driving gear (311), two of the cutter shafts (500) are both provided with first driven gears (312), and the first driving gear (311) is respectively meshed with the two first driven gears (312);

the output shaft of the second motor (320) is provided with a second driving gear (321), the other two cutter shafts (500) are respectively provided with a second driven gear (322), and the second driving gear (321) is respectively meshed with the two second driven gears (322).

3. The four-shaft crusher of claim 1,

the locking assembly (600) comprises a locking cover (610), the accommodating groove (411) penetrates through the first side plate (410), the end portion of the cutter shaft (500) passes through the accommodating groove (411) and extends out of the crushing box body (200), the end portion of the cutter shaft (500) is fixedly sleeved with the locking cover (610), and the locking cover (610) can extrude the inner ring of the bearing (412).

4. The four-shaft crusher of claim 3,

the locking cover (610) is fixedly connected with the end part of the cutter shaft (500) through a fastener.

5. The four-shaft crusher of claim 3,

the locking assembly (600) further comprises a washer (620), the washer (620) is sleeved on the cutter shaft (500), the washer (620) is located between the locking cover (610) and the bearing (412), one end face of the washer (620) is abutted to the locking cover (610), and the other end face of the washer (620) is abutted to the inner ring of the bearing (412).

6. The four-shaft crusher of claim 1,

the inboard of first sideboard (410) is equipped with first guard ring (710), first guard ring (710) with first sideboard (410) fixed connection, the inner endwall of first guard ring (710) is equipped with ring channel (711), the cover is equipped with second guard ring (720) on arbor (500), second guard ring (720) are equipped with first bulge loop (721), first bulge loop (721) with the cooperation is inserted to ring channel (711), second guard ring (720) with first guard ring (710) can rotate relatively.

7. The four-shaft crusher of claim 6,

the second protection ring (720) is further provided with a second convex ring (722), and the second convex ring (722) penetrates through the first protection ring (710) and the first side plate (410) and is abutted against the inner ring of the bearing (412).

8. The four shaft crusher of claim 7,

still include second sideboard (420), be equipped with on second sideboard (420) with the hole of dodging that second guard ring (720) corresponds the setting, dodge the hole with second guard ring (720) are inserted and are established the cooperation, first guard ring (710) are located first sideboard (410) with between second sideboard (420).

9. The four-shaft crusher of claim 1,

the first side plate (410) is fixedly connected with the crushing box body (200) through a fastener.

10. The four-shaft crusher of claim 1,

the cutter heads (510) of two adjacent cutter shafts (500) are arranged in a stacked and staggered mode.

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