Patent Publication Number: US-11376601-B2

Title: Crushing device for waste tire and multi-functional crusher with crushing device

Description:
CROSS REFERENCE OF RELATED APPLICATION 
     The application is a continuation application of a PCT application No. PCT/CN2019/098769, filed on Aug. 1, 2019; and claims the priority of Chinese Patent Application CN 201910610510.3, filed to the State Intellectual Property Office of China (SIPO) on Jul. 8, 2019, the entire content of which are incorporated hereby by reference. 
    
    
     BACKGROUND OF THE PRESENT INVENTION 
     Field of Invention 
     The present invention relates to a technical field of crushing equipment, and more particularly to a crushing device for a waste tire and a multi-functional crusher with the crushing device. 
     Description of Related Arts 
     With the global industrialization process and the rapid development of the automobile industry, the auto tires have also increased dramatically as an essential component, followed by recycling of waste tires. Crusher is an indispensable equipment in the recycling process of the waste tires. Conventional crushers process the waste tires with a strip cutting device, and then crush the cut strips with a crushing device. The strip cutting device and the crushing device generally adopt fixedly installed tooth rollers, which cannot control the width of the tire strips. And it is difficult to repair and maintain the crusher. 
     In addition, in other treatments of the waste tires, such as freezing and oil refining, there are problems such as high treatment cost and secondary pollution. 
     Chinese patent (CN 109664439 A) disclosed “a resource recovery system”, comprising a machine body, a cutting device, a crushing device, and a filter, wherein a top part of the machine body is provided with a feed hopper; the cutting device is arranged in a cutting cavity of the machine body, and the crushing device is arranged in a crushing cavity of the machine body; the filter is arranged in a receiving cavity of the machine body, and is located below the crushing device. The device was designed to crush the waste tires and improve resource utilization. However, in practice, the device is difficult to inspect and repair, and it is impossible to control the width of the cut strips of the tires. 
     Chinese patent (CN 107127910 B) disclosed “a crusher for recycling tire rubber”, comprising a cutting mechanism with a pair of engaged tooth rollers, a barrel, and a cutting roller, wherein a material barrel is located above the cutting roller; a cutter is distributed between the material barrel and the cutting roller, and the cutter is driven by a driving mechanism; the cutting mechanism is located below the cutting roller. The device takes advantages of the cutter which cuts the tires and the tooth rollers which crush the rubber strips to avoid most of the dense textured structure, thereby reducing wear of the cutter and extending the service life. However, the device is difficult to inspect and repair, and has poor convenience. 
     SUMMARY OF THE PRESENT INVENTION 
     Aiming at the deficiencies in the prior art, the present invention provides a crushing device for a waste tire and a multi-functional crusher with the crushing device, so as to improve convenience of part replacement of the multi-functional crusher and crushing efficiency of the waste tire, and decrease production costs of the crushing device and the multi-functional crusher. 
     In order to accomplish the above object, the present invention adopts technical solutions as follows. 
     A crushing device for a waste tire is provided, comprising a roll shaft and crushing components arranged on the roll shaft, wherein: the roll shaft comprises a main shaft, a roll shaft main body fixedly arranged on the main shaft, and roll shaft blockers arranged at two axial ends of the main shaft; a plurality of roll shaft convex bodies are arranged on a periphery of the roll shaft main body along a circumferential direction; and a roll shaft groove is formed between each two adjacent roll shaft convex bodies. 
     The crushing components comprise tools, axial interval adjusting blocks and/or radial supporting blocks, wherein: each tool consists of a tool base and a tool head which are fixedly connected; and a tool base groove, corresponding to the roll shaft convex body, is provided on the tool base. The tools are divided into cutting tools and grinding tools, wherein: the cutting tools are longer than the grinding tools; symmetrical cutting convex surfaces are arranged at a connection surface between a tool base and a tool head of each cutting tool; preferably, a top end of the tool head of each cutting tool is linear; a grinding convex surface is arranged at a side of a connection surface between a tool base and a tool head of each grinding tool along an axial direction of a grinding tool base groove; preferably, a top end of the tool head of each grinding tool is a curved surface. 
     Each radial supporting block consists of a supporting main body and a supporting base, wherein: a supporting groove, corresponding to the roll shaft convex body, is provided on the supporting base; a supporting convex surface is arranged at a side of a connection surface between the supporting main body and the supporting base along an axial direction of the supporting groove; and a top end of the supporting main body is a curved surface. 
     An axial interval adjusting block groove, corresponding to the roll shaft convex body, is provided on each axial interval adjusting block; the tools, the radial supporting blocks, and the axial interval adjusting blocks are slidably engaged with the roll shaft convex bodies; and the roll shaft fixes the roll shaft blockers and the crushing components through locking structures. 
     Preferably, the locking structures comprise a plurality of locking threaded holes provided on two end surfaces of the roll shaft main body, a plurality of locking through-holes which are provided on the roll shaft blockers and correspond to the plurality of locking threaded holes, and main shaft through-holes provided on the roll shaft blockers, through which the main shaft passes; and bolts pass through the locking through-holes and the locking threaded holes, so that the crushing components and the roll shaft blockers are locked and fixed. 
     A first multi-functional crusher is further provided, comprising a box, a recovery device and the crushing device, wherein: a material inlet and a material outlet are provided at an upper part of the box; the crushing device is arranged on a common frame body outside the box through the main shaft; the crushing device is driven through a drive mechanism and rotates around the main shaft. 
     The recovery device comprises a recovery component arranged inside the box and a recovery pushing mechanism arranged at the material outlet, wherein: the recovery pushing mechanism comprises a recovery pushing plate and a recovery pushing part arranged on the recovery pushing plate; the recovery pushing plate is slidably connected to a first side plate of the box at the material outlet; a discharge port, corresponding to the recovery pushing plate, is provided at an upper part of a front plate or a back plate of the box; the front plate and the back plate of the box are both detachably connected to the box. 
     The first multi-functional crusher further comprises a cooling medium mechanism, wherein: the cooling medium mechanism comprises a cooling medium through-hole, a reflux groove and a filtering cavity; the cooling medium through-hole is provided on the front plate or the back plate of the box; the reflux groove is provided on the front plate and/or the back plate of the box; the filtering cavity is arranged below a filtering top plate at the material outlet; a first end of the reflux groove is interconnected to the filtering cavity through a first through-hole, and a second end of the reflux groove is interconnected to a crushing cavity for placing the waste tire through a second through-hole; and the first through-hole and the second through-hole are both provided on a connection surface between the reflux groove and the front plate or the back plate of the box. 
     The recovery component comprises a lower axial blocker detachably connected to a bottom plate of the box, wherein: the lower axial blocker is engaged with the crushing components; the lower axial blocker and a first end of the material outlet are connected to a lower recovery plate. 
     The recovery component further comprises an upper axial blocker detachably connected to a top plate of the box, wherein: the upper axial blocker is engaged with the crushing components; the upper axial blocker and a second end of the material outlet are connected to an upper recovery plate. 
     The recovery component comprises the upper recovery plate and the lower recovery plate which are connected to the material outlet; the upper recovery plate and the lower recovery plate are both engaged with the crushing components. 
     Preferably, a crushing pushing mechanism and a material inlet cover mechanism are arranged on a second side plate of the box at the material inlet, wherein: the crushing pushing mechanism comprises a crushing pushing plate and a crushing pushing part arranged on the crushing pushing plate; the material inlet cover mechanism comprises a cover plate for covering the material inlet and a cover pushing part arranged on the cover plate; the crushing pushing plate and the cover plate are both slidably connected to the front plate and the back plate of the box. 
     A second multi-functional crusher is further provided, comprising a box, a recovery device and the crushing device, wherein: material inlets and a material outlet are provided at an upper part of the box; the crushing device is arranged on a common frame body outside the box through the main shaft; the recovery device is arranged above the crushing device, comprising a recovery box and a recovery pushing mechanism; the material outlet is provided at a middle part of a bottom surface of the recovery box; the material inlets are provided at two side plates of the recovery box; the recovery pushing mechanism comprises a recovery pushing plate and a recovery pushing part arranged on the recovery pushing plate; the recovery pushing plate is slidably connected to the side plates of the recovery box; and a discharge port, corresponding to the recovery pushing plate, is provided on a front plate or a back plate of the box. 
     Preferably, crushing pushing mechanisms and material inlet cover mechanisms are arranged on the both two side plates of the box; each crushing pushing mechanism comprises a crushing pushing seat and a crushing pushing part arranged on the crushing pushing seat; each material inlet cover mechanism comprises a cover plate and a cover pushing part arranged on the cover plate; the crushing pushing seats and the cover plates are all slidably connected to the front plate and the back plate of the box; and the crushing pushing seats are engaged with the crushing components. 
     Compared with the prior art, the present invention has beneficial effects as follows. 
     (1) Through adopting the crushing device which integrates the crushing components with the roll shaft, the usage and maintenance convenience of the crushing device are improved, the production cost is decreased, and the working efficiency is increased; meanwhile, through the flexible arrangement of the tools, the radial supporting blocks and the axial interval adjusting blocks with the roll shaft, the crushing device can be applied in different working conditions. 
     (2) Through adopting the multi-functional crusher with the crushing device, the production cost is decreased; the recovery device and the recovery pushing mechanism realize the automatic operation during the crushing process, so that the human cost and the operation cost are decreased; the usage of the cooling medium mechanism realizes the circulation of the cooling medium, so that the working temperature during the crushing process is decreased and the crusher is protected, thereby improving the working efficiency. 
     (3) The detachable connection of the front plate and the back plate of the box and the usage of the detachable axial blockers increase the check and maintenance efficiency of the crusher, so that the crushing device is unnecessary to be removed out of the box when checking and maintaining the crusher, which realizes the fast maintenance inside the box and saves time and labor. 
     (4) The locking threaded holes are provided in square around a center of the end surface of the roll shaft main body, so as to guarantee an overall stability of the crushing device. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a structural sketch view of a multi-functional crusher according to a first preferred embodiment of the present invention. 
         FIG. 2  is a structural sketch view of a roll shaft main body and a main shaft according to the first preferred embodiment of the present invention. 
         FIG. 3  is a structural sketch view of a crushing device according to the first preferred embodiment of the present invention. 
         FIG. 4  is a structural sketch view of an axial interval adjusting block according to the first preferred embodiment of the present invention. 
         FIG. 5  is a structural sketch view of a cutting tool according to the first preferred embodiment of the present invention. 
         FIG. 6  is a structural sketch view of a grinding tool according to the first preferred embodiment of the present invention. 
         FIG. 7  is a structural sketch view of a radial supporting block according to the first preferred embodiment of the present invention. 
         FIG. 8  is a structural sketch view of a multi-functional crusher according to a second preferred embodiment of the present invention. 
         FIG. 9  is a structural sketch view of a multi-functional crusher according to a third preferred embodiment of the present invention. 
         FIG. 10  is a structural sketch view of a multi-functional crusher according to a fourth preferred embodiment of the present invention. 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
     The present invention is further illustrated with the preferred embodiments as follows. One skilled in the art can easily know the advantages and effects of the present invention from the disclosure of the specification. It should be known that: the structure, proportion and size shown in the figures are all only for matching the disclosure of the specification, so that one skilled in the art can know and read the technical solutions of the present invention, which are not for limiting the implementation of the present invention and do not have the substantive meaning in technology. Without influencing the generable effects and accomplishable objects of the present invention, any structural modification, change of the proportional relation, or the adjustment of the size should be all encompassed in the range of the technical solutions of the present invention. Meanwhile, the terms such as “up”, “down”, “left”, “right”, “front”, “back”, “middle” and “one” referred in the specification are only for clear description, not for limiting the implementable scope of the present invention. Without the substantive change of the technical solutions, the change or adjustment of the relative relation is also seen as the implementable scope of the present invention. 
     First Preferred Embodiment 
     According to the first preferred embodiment, as shown in  FIGS. 1-7 , the present invention provides a crushing device for a waste tire and a multi-functional crusher with the crushing device. 
     The crushing device  2  comprises a roll shaft and crushing components arranged on the roll shaft, wherein: the roll shaft comprises a main shaft  202 , a roll shaft main body  201  fixedly arranged on the main shaft  202 , and roll shaft blockers  203  and  208  arranged at two axial ends of the main shaft  202 ; and the roll shaft blockers  203  and  208  are detachably connected to the roll shaft main body  201  through locking structures. 
     As shown in  FIG. 2 , a plurality of roll shaft convex bodies  204  are uniformly and fixedly arranged on a periphery of the roll shaft main body  201  along a circumferential direction; a roll shaft groove  205  is formed between each two adjacent roll shaft convex bodies  204 ; the roll shaft convex bodies  204  and the roll shaft grooves  205  are for arranging corresponding crushing components; the roll shaft convex bodies  204  can be in various shapes, such as being trapezoidal and cylindrical; in the first preferred embodiment, the trapezoidal roll shaft convex bodies  204  as an example are described in detail. 
     As shown in  FIG. 3 , two end surfaces of the roll shaft main body  201  have the same structure, and the roll shaft blockers  203  and  208  at the two end surfaces have the same structure. In the preferred embodiment, one side of the crushing device as an example is described in detail. 
     The roll shaft blocker  203  is circular; a radius of the roll shaft blocker  203  is larger than that of the end surfaces of the roll shaft main body  201 ; through the locking structures, the roll shaft blocker  203  is detachably connected to the roll shaft main body  201 ; the locking structures comprise a plurality of locking threaded holes  241  provided on the two end surfaces of the roll shaft main body  201 , and a plurality of locking through-holes  243  corresponding to the plurality of locking threaded holes  241  on the end surfaces of the roll shaft main body and a main shaft through-hole  207  corresponding to the main shaft  202  which are provided on the roll shaft blocker  203 ; bolts pass through the plurality of locking threaded holes  241  and the plurality of locking through-holes  243 , so that the roll shaft main body  201  and the roll shaft blockers  203  and  208  are locked and fixed; in order to guarantee a stability of a crushing device  2  when rotating, the plurality of locking threaded holes  241  are provided in regular triangle around the main shaft through-hole  207 . 
     The crushing components comprise tools, axial interval adjusting blocks and radial supporting blocks, which match with the roll shaft convex bodies  204  and the roll shaft grooves  205 , wherein: each tool consists of a tool base and a tool head which are fixedly connected; a tool base groove, corresponding to the roll shaft convex body  204 , is provided on the tool base; and an axial interval adjusting block groove  214 , corresponding to the roll shaft convex body  204 , is provided on each axial interval adjusting block. 
     As shown in  FIG. 7 , each radial supporting block consists of a supporting main body  901  and a supporting base  902 , wherein: a supporting groove  903 , corresponding to the roll shaft convex body  204 , is provided on the supporting base  902 ; a supporting convex surface  904  is arranged at a side of a connection surface between the supporting main body  901  and the supporting base  902  along an axial direction of the supporting groove  903 ; and a top end  905  of the supporting main body is a curved surface. 
     The tools, the axial interval adjusting blocks and the radial supporting blocks are slidably engaged with the roll shaft convex bodies  204  along an axial direction of the main shaft  202 . 
     The tools are divided into cutting tools and grinding tools, wherein: the cutting tools are higher than the grinding tools; for each cutting tool, symmetrical cutting convex surfaces  227  are arranged at two sides of a connection surface between a lower end surface of a cutting tool head  215  and an upper end surface of a cutting tool base  216  along an axial direction of a cutting tool base groove  217 , and a top end  218  of the cutting tool head of the cutting tool is linear; for each grinding tool, a grinding convex surface  231  is arranged at a side of a connection surface between a lower end surface of a grinding tool head  219  and an upper end surface of a grinding tool base  220  along an axial direction of a grinding tool base groove  221 , and a top end of the grinding tool head of the grinding tool is a curved surface. 
     When cutting the waste tire, the cutting tools and the grinding tools can be used independently or used together. When grinding the waste tire, only the grinding tools are used; a side of the grinding tool head  219  of each grinding tool, where no grinding convex surface  231  is arranged along the grinding tool base groove  221 , is a grinding surface; when grinding, the grinding surfaces of the adjacent grinding tools contact to form the grinding grooves, so as to grind the waste tire; the radial supporting blocks are arranged on the adjacent roll shaft convex bodies, and the supporting convex surfaces  904  of the adjacent radial supporting blocks contact to form the supporting grooves, playing a role of transportation channel for the ground waste tire, so that the ground waste tire moves between the grinding grooves and the supporting grooves alternately, thereby decreasing the heat generated during the grinding process. 
     When cutting or grinding the waste tire, the axial interval adjusting blocks can be arranged between the adjacent cutting tools, grinding tools and radial supporting blocks along an axial direction of the roll shaft according to actual working conditions, for interval adjustment. 
     The multi-functional crusher with the crushing device comprises a box  1 , the crushing device  2 , and a recovery device  3 , wherein: a crushing cavity  104  for placing the waste tire is provided inside the box  1 ; a material inlet  101  is provided on a top plate of the box, corresponding to the crushing cavity  104 ; the waste tire enters the crushing cavity  104  through the material inlet  101 ; a feed plate  103  is arranged at the material inlet  101  in a certain angle, which facilitates feeding; a material outlet  102  is also provided on the top plate of the box  1 , for discharging crushed debris; and the top plate of the box, where the material outlet  102  is located, is a filleting top plate  105  with dense filtering through-holes provided thereon. 
     The main shaft  202  passes through a front plate  115  and a back plate  116  of the box  1 , for arranging the crushing device  2  on a common frame body outside the box  1 ; the crushing device  2  is driven through a drive mechanism and rotates around the main shaft  202 ; the drive mechanism is preferred to be a motor  206  assembled on the main shaft  202 ; the front plate  115  and the back plate  116  of the box are higher than the top plate of the box, for blocking the waste tire put into the material inlet  101  and the crushed debris at the material outlet  102 ; the front plate  115  and the back plate  116  of the box are detachably connected to the box  1 . 
     The recovery device  3  comprises a recovery component and a recovery pushing mechanism at the material outlet  102 , wherein: the recovery pushing mechanism comprises a recovery pushing plate  302  and a recovery pushing part  303  arranged on the recovery pushing plate  302 ; the recovery pushing plate  302  is slidably connected to a side plate  117  of the box, and the side plate is arranged at a side of the material outlet  102 ; a discharge port  304 , corresponding to the recovery pushing mechanism, is provided at an upper part of the front plate  115  of the box, so as to push the crushed debris out of the box from the discharge port  304 ; and the recovery pushing part  303  is preferred to be a hydraulic part. 
     The recovery component comprises an upper axial blocker  305  detachably connected to the top plate of the box and a lower axial blocker  306  detachably connected to a bottom plate of the box, wherein: the upper axial blocker  305  and the lower axial blocker  306  are engaged with the crushing components; the upper axial blocker  305  and a first end of the material outlet  102  are connected to an upper recovery plate  307 ; the lower axial blocker  306  and a second end of the material outlet  102  are connected to a lower recovery plate  308 ; and the upper recovery plate  307  protrudes from the material outlet  102 , so as to avoid an outflow of the debris during the discharge process. 
     A crushing pushing mechanism and a material inlet cover mechanism are arranged at the material inlet  101 , wherein: the crushing pushing mechanism comprises a crushing pushing plate  212 , which is slidably connected to the front plate  115  and the back plate  116  of the box, and a crushing pushing part  213  arranged on the crushing pushing plate  212 ; the material inlet cover mechanism comprises a cover plate  209 , which is slidably connected to the front plate  115  and the back plate  116  of the box, and a cover pushing part  210  arranged on the cover plate  209 ; and, the cover pushing part  210  and the crushing pushing part  213  are both preferred to be hydraulic parts. 
     The multi-functional crusher further comprises a cooling medium mechanism, wherein: the cooling medium mechanism comprises a cooling medium through-hole  401  provided on the front plate  115  of the box, through which a cooling medium enters the box, a front reflux groove  402  arranged on the front plate  115  of the box, a back reflux groove  412  arranged on the back plate  116  of the box, and a filtering cavity  403 ; the filtering cavity is an enclosed cavity formed by the filtering top plate  105 , the side plate  117  of the box, the bottom plate of the box, the lower recovery plate  308  and the lower axial blocker  306 ; a first end of the front reflux groove  402  is interconnected to the filtering cavity  403  through a first through-hole, and a second end of the front reflux groove  402  is interconnected to the crushing cavity  104  through a second through-hole, so as to recycle the cooling medium; the first through-hole and the second through-hole are both provided on a connection surface between the front plate  115  of the box and the front reflux groove  402 ; the connection way of the back reflux groove  412  to the filtering cavity  403  and the crushing cavity  104  is same as that of the front reflux groove  402 , and is not repeated herein. 
     According to the present invention, an implementation method of the multi-functional crusher comprises steps of: 
     (1) selecting the plurality of roll shaft convex bodies on the roll shaft main body, and assembling the crushing components thereon; and, according to actual requirements, arranging the cutting tools, the grinding tools, the radial supporting blocks, and the axial interval adjusting blocks; 
     (2) arranging the crushing device inside the box; and introducing a certain volume of cooling medium into the box through the cooling medium through-hole  401 ; 
     (3) putting a certain amount of waste tire into the box through the material inlet  101 ; and pushing the cover plate  209  by the cover pushing part  210 , so that the cover plate  209  covers the material inlet  101  and the relatively enclosed crushing cavity  104  is formed; 
     (4) starting the motor  206 , and pushing the crushing pushing plate  212  by the crushing pushing part  213 , so that the waste tire moves towards the crushing device; 
     (5) cutting the waste tire into strips or blocks by the cutting tools; and continuously grinding the waste tire, obtained after cutting, between the intervals of the crushing components by the grinding tools; 
     (6) under an effect of rotational centrifugal force of the crushing device  2 , by the ground debris, entering a channel among the material outlet  102 , the upper recovery plate  307  and the lower recovery plate  308  through a fit clearance between the lower axial blocker  306  and the tools, and being gradually accumulated on the filtering top plate  105 ; 
     (7) pushing the recovery pushing plate  302  by the recovery pushing part  303 , so as to push the crushed debris out of the box  1  from the discharge port  304 ; wherein: during the process, the cooling medium in the debris is gradually accumulated in the filtering cavity  403  through the filtering through-holes on the filtering top plate  105 , and then returns to the crushing cavity  104  through the front reflux groove  402  and the back reflux groove  412 , which circulates continuously; and 
     (8) during the crushing process of the waste tire, recovering the cover plate  209 , the cover pushing part  210 , the crushing pushing plate  212 , the crushing pushing part  213 , the recovery pushing plate  302  and the recovery pushing part  303  to original positions, and repeating the steps of (3)-(7), so as to realize an automatic cycle operation. 
     When cutting the waste tire into blocks, the lower axial blocker  306  and the upper axial blocker  305  are removed from the box  1 ; according to width requirements of waste tire cutting, the tools, the radial supporting blocks and the axial interval adjusting blocks, conforming to the cutting requirements, are assembled on the roll shaft convex bodies; the detailed working process is same as the above steps and not repeated herein. 
     Furthermore, the crushing solid can be cut or ground with the cutting tools or the grinding tools independently. 
     Second Preferred Embodiment 
     As shown in  FIG. 8 , according to the second preferred embodiment, a multi-functional crusher is provided. The multi-functional crusher in the second preferred embodiment is different from the multi-functional crusher in the first preferred embodiment in that: the crushing pushing mechanism, the material inlet cover mechanism, and the upper axial blocker  305  are removed; in addition, the top plate  125  between the material inlet  101  and the material outlet  102  is removed; and an arc-shaped baffle  6  is added at a side of the crushing device in the box, for pushing the crushed waste tire to the lower axial blocker and reducing a manufacturing difficulty of the crusher. 
     An implementation method of the multi-functional crusher comprises steps of: 
     (1) selecting the plurality of roll shaft convex bodies on the roll shaft main body, and assembling the crushing components thereon; and, according to actual requirements, arranging the cutting tools, the grinding tools, the radial supporting blocks, and the axial interval adjusting blocks; 
     (2) arranging the crushing device inside the box; and introducing a certain volume of cooling medium into the box through the cooling medium through-hole; 
     (3) starting the motor; 
     (4) putting the waste tire into the box through the material inlet; 
     (5) cutting the waste tire into strips or blocks by the cutting tools; and continuously grinding the waste tire, obtained after cutting, between the intervals of the crushing components by the grinding tools; 
     (6) under an effect of rotational centrifugal force of the crushing device, by the ground debris, firstly passing through the arc-shaped baffle  6 , then entering a channel among the material outlet, the upper recovery plate and the lower recovery plate through a fit clearance between the lower axial blocker and the tools, and being gradually accumulated on the filtering top plate; 
     (7) pushing the recovery pushing plate by the recovery pushing part, so as to push the crushed debris out of the box from the discharge port; wherein: during the process, the cooling medium in the debris is gradually accumulated in the filtering cavity through the filtering through-holes on the filtering top plate, and then returns to the crushing cavity through the front reflux groove and the back reflux groove, which circulates continuously; and 
     (8) during the crushing process of the waste tire, recovering the recovery pushing plate and the recovery pushing part to original positions, and repeating the steps of (4)-(7), so as to realize an automatic cycle operation. 
     The crusher in the second preferred embodiment is suitable for processing the relatively heavy big waste tire and other solid materials, and can conduct the crushing operation continuously. 
     Third Preferred Embodiment 
     As shown in  FIG. 9 , according to the third preferred embodiment, a multi-functional crusher is provided. The multi-functional crusher in the third preferred embodiment is different from the multi-functional crusher in the first preferred embodiment in that: an upper crushing device  703  and a lower crushing device  704 , which are engaged with each other, are arranged; a lower end of the upper crushing device  703  and the material outlet are connected to an upper recovery plate  702 ; the upper recovery plate  702  protrudes from the top plate of the box; the upper recovery plate  702  is engaged with the crushing components of the upper crushing device  703 ; the lower crushing device  704  and the bottom plate of the box are connected to a lower recovery plate  701 ; and the lower recovery plate  701  is engaged with the crushing components of the lower crushing device  704 . 
     The implementation method of the crusher in the third preferred embodiment is same as that in the first preferred embodiment. 
     Fourth Preferred Embodiment 
     As shown in  FIG. 10 , according to the fourth preferred embodiment, a multi-functional crusher is provided. The multi-functional crusher in the fourth preferred embodiment is different from the multi-functional crusher in the first preferred embodiment in that: the crushing pushing mechanism and the material inlet cover mechanism are arranged on both two side plates of the box; the recovery component and the cooling medium mechanism are removed; the crushing pushing plate in the original crushing pushing mechanism is replaced by the crushing pushing seats, respectively a first crushing pushing seat  501  and a second crushing pushing seat  502 ; and grooves are provided on the first crushing pushing seat  501  and the second crushing pushing seat  502 , for being engaged with the crushing components. 
     Furthermore, the recovery device is different and arranged above the crushing device, comprising a recovery box and a recovery pushing mechanism arranged at a back side of the recovery box, wherein: a material outlet  508  is provided at a middle part of a bottom surface of the recovery box; material inlets  503  and  504  are respectively provided at side plates  510  and  511  of the recovery box; both of the side plates  510  and  511  of the recovery box are filtering plates with filtering holes provided thereon; the recovery pushing mechanism comprises a recovery pushing plate  505 , which is slidably connected to the side plates  510  and  511  of the recovery box, and a recovery pushing part  506  arranged on the recovery pushing plate; and a discharge port  509 , corresponding to the recovery pushing mechanism, is provided at the upper part of the front plate of the box. 
     An implementation method of the multi-functional crusher comprises steps of: 
     (1) selecting the plurality of roll shaft convex bodies on the roll shaft main body, and assembling the crushing components thereon; and, according to actual requirements, arranging the cutting tools, the grinding tools, the radial supporting blocks, and the axial interval adjusting blocks; 
     (2) injecting a certain volume of cooling medium into the box through a cooling medium through-hole  507  provided on the front plate of the box; 
     (3) putting a certain amount of waste tire into the box through the material inlets  503  and  504 ; and pushing the corresponding cover plates respectively by the cover pushing parts at the two sides, so that the cover plates cover the material inlets  503  and  504  and the relatively enclosed crushing cavity is formed; 
     (4) pushing the corresponding crushing pushing plates respectively by the two crushing pushing parts, so as to crush the waste tire; 
     (5) the crushed tire being gradually accumulated in the recovery box along the material outlet  508 ; a part of the injected cooling medium returning to the box along the material outlet  508 , and the other part of the injected cooling medium passing through the filtering plates at the two sides of the recovery box and returning to the box along the grooves on the crushing pushing seats, so as to realize continuous circulation of the cooling medium; 
     (6) pushing the recovery pushing plate  505  by the recovery pushing part  506 , so as to push the crushed debris out of the box from the discharge port  509 ; and 
     (7) recovering the crushing pushing mechanisms and the material inlet cover mechanisms, which are arranged at the two sides of the box, and the recovery pushing mechanism to original positions, and repeating the steps of (3)-(6), so as to realize a continuous cycle operation. 
     The technical solutions of the present invention are further described with the above preferred embodiment, but the protection scope of the present invention is not limited thereto. Equivalent modifications and changes made by one of ordinary skill in the art without departing from the spirit and range of the present invention should be all encompassed in the protection scope of the present invention.