Waste tire fine crusher

Abstract

The waste tire fine crusher comprises a lower box body and an upper box body which are used for defining a fine crushing space, a fine crushing rotating shaft is installed on the lower box body, a rotor located in the fine crushing space is fixedly arranged on the fine crushing rotating shaft, and a plurality of fine crushing moving cutters which are evenly distributed in the circumferential direction are fixedly installed on the rotor; the cutting edge line of the fine crushing moving cutter is parallel to the axis of the fine crushing rotating shaft; a fine crushing fixed cutter is fixedly mounted on the lower box body, and a cutting edge line of the fine crushing fixed cutter is obliquely arranged; the fine crushing rotating shaft is connected with a fine crushing driving device, a polishing driving device is installed on the lower box body, a polishing clutch device is arranged between an output shaft of the polishing driving device and the fine crushing rotating shaft, and the polishing clutch device is separated during fine crushing operation and combined during polishing operation; and a polishing mounting seat for mounting a polishing device is fixedly arranged on the lower box body. Online grinding of the fine crushing moving cutter is achieved, the grinding efficiency is remarkably improved, the labor intensity of workers is reduced, potential safety hazards are reduced, and the grinding effect is good.

Description

Technical Field

[0001] The invention relates to the technical field of crushing machinery, in particular to a waste tire crusher. Background Art

[0002] Waste tires are tires that are discarded due to wear or aging after use. They include not only large tires discarded by cars and trucks, but also small tires discarded by general two-wheeled and three-wheeled electric vehicles. Waste tires contain a large amount of rubber resources. Recycling them is an important measure to alleviate the shortage of natural rubber resources and reduce pollution. Among them, crushing waste tires into velvet or powder is an important step in purifying rubber resources and subsequent recycling. In this step, the waste tires are generally crushed into particles first, and then input into the fine crusher for fine crushing.

[0003] A fine crushing space is provided in the fine crusher, in which a high-speed rotating rotor is installed. A plurality of moving knives are arranged circumferentially on the rotor, and a fixed knife is fixed on the machine body. The moving knife is installed obliquely on the rotor. When the moving knife rotates to the fixed knife, the tire particles are sheared by the sequential shearing effect formed between the blades of the two. In this way, high-speed fine crushing is continuously performed, and the material crushed to a specified fineness falls from the screen below the fine crushing space.

[0004] After the fine crusher has been working for a certain period of time, it is necessary to disassemble the machine and grind and maintain the fixed blade and the movable blade to repair defects such as wear and ensure the fine crushing effect. At present, the grinding of the movable blade is mainly carried out by disassembling the rotor as a whole to the grinding location, and then grinding it manually one by one. Due to the heavy weight of the rotor and the complex connections such as bearings between it and the machine body, its disassembly and assembly is very time-consuming and labor-intensive, and the grinding process requires manual rolling and flipping to switch the movable blade to be ground. The manual labor intensity is high, the safety hazards are great, and the overall grinding efficiency is extremely low. In addition, the manual grinding of the movable blade has a poor grinding base, and the fine crushing gap between it and the fixed blade is uneven after reinstallation, and the repair effect is always unsatisfactory. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a waste tire crusher which can significantly improve the grinding efficiency, reduce the labor intensity, reduce the potential safety hazard and has a good grinding effect.

[0006] In order to solve the above technical problems, the technical solution of the present invention is: a waste tire shredder comprises a lower box body and an upper box body for enclosing a shredding space, the lower box body is equipped with a shredding shaft, the shredding shaft is fixedly provided with a rotor located in the shredding space, the rotor is fixedly provided with a plurality of circumferentially uniformly arranged shredding movable knives, the blade line of the shredding movable knives is arranged parallel to the axis of the shredding rotating shaft; the lower box body is fixedly provided with a shredding fixed knife, the blade line of the shredding fixed knife is parallel to the axis of the shredding rotating shaft The blade lines of the crushing movable knife are arranged obliquely with intersection; the crushing shaft is connected to a crushing drive device, a grinding drive device is installed on the lower box body, a grinding clutch device is provided between the output shaft of the grinding drive device and the crushing shaft, the grinding clutch device is separated during the crushing operation and combined during the grinding operation; a grinding mounting seat for installing a grinding device is fixed on the lower box body, and the grinding device is used to grind the blade of the crushing movable knife along the axial direction parallel to the crushing shaft.

[0007] As a preferred technical solution, the grinding device includes a grinding base fixedly connected to the grinding mounting seat, a grinding reciprocating seat is installed on the grinding base, the reciprocating direction of the grinding reciprocating seat is parallel to the axial direction of the crushing shaft, and a reciprocating drive is provided between the grinding reciprocating seat and the grinding base; a grinding wheel is rotatably mounted on the grinding reciprocating seat, and the grinding wheel is connected to a grinding drive.

[0008] As a preferred technical solution, a vertically movable grinding lifting seat is installed on the grinding reciprocating seat, the grinding wheel and the grinding driver are installed on the grinding lifting seat, and a lifting height adjuster is provided between the grinding lifting seat and the grinding reciprocating seat.

[0009] As a preferred technical solution, a distance adjustment structure for adjusting the distance between the grinding wheel and the crushing movable knife is provided between the grinding base and the grinding mounting seat.

[0010] As a preferred technical solution, the grinding clutch device includes a coupling connection hole radially arranged at the end of the crushing shaft, and a clutch sleeve that is sleeved on the corresponding end of the crushing shaft is fixedly provided on the output shaft of the grinding drive device, and the clutch sleeve is provided with a coupling through hole corresponding to the coupling connection hole, and a coupling connection pin passing through the coupling through hole is installed on the coupling connection hole.

[0011] As a preferred technical solution, a fine crushing gap adjustment structure is provided between the fine crushing fixed knife and the lower box body.

[0012] As a preferred technical solution, the fine crushing gap adjustment structure includes fixed knife fastening bolts installed in sequence on the lower box body along the blade line direction of the fine crushing fixed knife, the fine crushing fixed knife is provided with fixed knife mounting through holes corresponding to each of the fixed knife fastening bolts, and the fixed knife mounting through holes are long holes arranged perpendicular to the blade line direction of the fine crushing fixed knife; a fixed knife limiting nut is fixedly provided on the lower box body at a side of the fine crushing fixed knife away from the rotor, and a gap maintaining bolt for pressing against the fine crushing fixed knife is installed on the fixed knife limiting nut.

[0013] As a preferred technical solution, a fine crushing feeding device is provided on the top of the upper box body.

[0014] As a preferred technical solution, the grinding operation includes the following steps:

[0015] Step 1: remove the upper box to expose the upper part of the rotor;

[0016] Step 2: The grinding clutch device is combined, and the grinding device is installed on the grinding mounting seat;

[0017] Step 3: The grinding drive device drives the rotor to rotate until one of the fine crushing movable knives on the upper part of the rotor reaches the grinding position of the grinding device and stops;

[0018] Step 4: the grinding device grinds the fine-crushing movable knife along the axial direction of the fine-crushing rotating shaft;

[0019] According to step three and step four, each of the fine crushing movable knives is polished in sequence until all the fine crushing movable knives are polished.

[0020] As a preferred technical solution, the grinding drive device in step three drives the rotor to rotate in a direction opposite to the rotation direction of the rotor during fine crushing operation, and the grinding wheel in the grinding device moves into the grinding range before the fine crushing movable knife arrives, and the rotor stops with the blade of the fine crushing movable knife resting on the grinding wheel of the grinding device.

[0021] Due to the adoption of the above technical scheme, the present invention sets the movable fine-crushing knife to be parallel to the axis of the fine-crushing shaft, and sets the fixed fine-crushing knife to be oblique. While the two form a sequential shearing effect, the installed grinding device can perform online grinding on the movable fine-crushing knife in a direction parallel to the axis of the fine-crushing shaft, without the need to disassemble and assemble the rotor. By relying on the online switching of the movable fine-crushing knife by the grinding drive device, the grinding of all movable fine-crushing knives can be completed in sequence, the grinding efficiency is significantly improved, the labor intensity is reduced, the mechanized grinding operation is realized as a whole, and the safety hazards are reduced; and because the grinding device realizes mechanical linear grinding, the grinding straightness is good, which is conducive to forming a uniform fine-crushing gap with the fixed fine-crushing knife, and the grinding effect is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The following drawings are intended only to illustrate and explain the present invention, and are not intended to limit the scope of the present invention.

[0023] Figure 1 is a schematic cross-sectional structural diagram of an embodiment of the present invention;

[0024] Figure 2 yes Figure 1 An enlarged structural diagram of one of the fine crushing fixed knives;

[0025] Figure 3 yes Figure 1 Schematic diagram of the left view structure;

[0026] Figure 4 is a schematic diagram of a top view of the structure of an embodiment of the present invention during grinding operation;

[0027] Figure 5 is a schematic cross-sectional view of the grinding operation of an embodiment of the present invention;

[0028] Figure 6 It is a schematic structural diagram of a grinding device according to an embodiment of the present invention.

[0029] In the figure: 1-fine crushing shaft; 11-fine crushing driving device; 2-rotor; 21-moving knife mounting plate; 22-moving knife mounting plate; 3-fine crushing moving knife; 4-fine crushing fixed knife; 5-grinding driving device; 51-grinding clutch device; 52-clutch sleeve; 53-combination connection hole; 54-combination through hole; 6-grinding mounting seat; 7-grinding device; 71-grinding base; 72-grinding reciprocating seat; 73-reciprocating driver; 74-grinding wheel; 75-grinding driver; 76-grinding lifting seat; 77-lifting height adjuster; 78-distance adjustment structure; 8-fine crushing gap adjustment structure; 81-fixed knife fastening bolt; 82-fixed knife mounting hole; 83-fixed knife limiting nut; 84-gap retaining bolt; 91-lower box body; 92-upper box body; 93-fine crushing space; 94-discharge port; 95-screen; 96-fine crushing feeding device. DETAILED DESCRIPTION

[0030] The present invention is further described below in conjunction with the accompanying drawings and examples. In the following detailed description, certain exemplary embodiments of the present invention are described only by way of illustration. Needless to say, those of ordinary skill in the art will recognize that the described embodiments may be modified in various ways without departing from the spirit and scope of the present invention. Therefore, the drawings and description are illustrative in nature and are not intended to limit the scope of protection of the claims.

[0031] like Figure 1 As shown, the waste tire shredder includes a lower box body 91 and an upper box body 92 for enclosing a shredding space 93. A shredding shaft 1 is installed on the lower box body 91, and a rotor 2 located in the shredding space 93 is fixed on the shredding shaft 1. Of course, a discharge port 94 is provided at the lower part of the lower box body 91, and a screen 95 is provided at the lower part of the shredding space 93 in the lower box body 91. The material shredded to a specified fineness is screened out from the screen 95 and output through the discharge port 94. The above structure is a well-known technology in the field of shredders and will not be described in detail here. Conventionally, a shredding feeding device 96 is provided at the top of the upper box body 92 to feed the tire particle material processed by the upstream coarse shredding. The shredding feeding device 96 can adopt a spiral push type or a star feed type, etc., which is not limited here. This embodiment is only illustrated by a spiral push type.

[0032] like Figure 1 and Figure 2 As shown, a plurality of circumferentially evenly distributed fine-crushing moving knives 3 are fixedly mounted on the rotor 2. In this embodiment, the rotor 2 includes a plurality of moving knife mounting disks 21 fixedly mounted in sequence on the fine-crushing shaft 1. A plurality of moving knife mounting plates 22 are fixedly welded together on the outer circumferential surfaces of the moving knife mounting disks 21. The fine-crushing moving knives 3 are fixedly mounted on the corresponding moving knife mounting plates 22 using bolts. The above structural arrangement of the rotor 2 and the installation of the fine-crushing moving knives 3 are easily obtained by those skilled in the art in combination with the existing moving knife technology and will not be described in detail herein.

[0033] like Figure 3 As shown, the blade line of the fine-crushing movable knife 3 is arranged parallel to the axis of the fine-crushing rotating shaft 1; the fine-crushing fixed knife 4 is fixedly installed on the lower box body 91, and the blade line of the fine-crushing fixed knife 4 is arranged obliquely to cross the blade line of the fine-crushing movable knife 3. Through the above arrangement, when the fine-crushing movable knife 3 passes through the fine-crushing fixed knife 4, the two can still form a gradually biting sequential shearing effect, and the fine-crushing movable knife 3 is parallel to the fine-crushing rotating shaft 1, so it is convenient to grind the blade of the fine-crushing movable knife 3 directly along the axis direction of the fine-crushing rotating shaft 1, which is conducive to simplifying the grinding operation.

[0034] In this embodiment, two fixed pulverizing knives 4 are provided, and they are respectively located on opposite sides of the rotor 2. The blade lines of the two fixed pulverizing knives 4 only need to form an intersection with the blade line of the movable pulverizing knives 3. The specific oblique arrangement is not limited here because the effects are the same. The number of movable pulverizing knives 3 is set according to the pulverizing efficiency requirements, etc., and is not limited here.

[0035] like Figure 1 , Figure 3 and Figure 4 As shown, the fine crushing shaft 1 is connected to a fine crushing driving device 11, and the fine crushing driving device 11 is used to drive the fine crushing shaft 1 to rotate at a high speed, so that the fine crushing movable blade 3 and the fine crushing fixed blade 4 in the fine crushing space 93 form a continuous and efficient fine crushing operation. Conventionally, the fine crushing driving device 11 includes a fine crushing driving motor, and the fine crushing driving motor is connected to the fine crushing shaft 1 by power transmission.

[0036] like Figure 3 and Figure 4 As shown, a grinding drive device 5 is installed on the lower box body 91, and a grinding clutch device 51 is provided between the output shaft of the grinding drive device 5 and the fine crushing shaft 1. The grinding clutch device 51 is separated during fine crushing operation and combined during grinding operation. During fine crushing operation, the grinding drive device 5 does not affect the high-speed drive of the rotor 2 by the fine crushing drive device 11. During grinding operation, the grinding drive device 5 can utilize the combination of the grinding clutch device 51 to drive the rotor 2 to switch the fine crushing movable blade 3 that needs to be polished. In this process, the grinding drive device 5 drives the output shaft of the fine crushing drive device 11 to passively rotate. Among them, the grinding drive device 5 includes a grinding drive motor and a grinding reducer to provide low-speed and high-torque output, and the output shaft of the grinding reducer constitutes the output shaft of the grinding drive device 5.

[0037] The grinding clutch device 51 of this embodiment includes a coupling hole 53 radially arranged at the end of the crushing shaft 1, and a clutch sleeve 52 is fixedly arranged on the output shaft of the grinding drive device 5 and is sleeved on the corresponding end of the crushing shaft 1, and a coupling through hole 54 corresponding to the coupling hole 53 is arranged on the clutch sleeve 52, and a coupling pin passing through the coupling through hole 54 is installed on the coupling hole 53. By installing the coupling pin on the coupling hole 53, the crushing shaft 1 can be synchronously rotated with the clutch sleeve 52, that is, the grinding clutch device 51 is coupled; and after the coupling pin is removed, the clutch sleeve 52 can rotate relative to the crushing shaft 1, so that the grinding clutch device 51 is separated.

[0038] The combination hole 53 may be a threaded hole, and the combination pin passes through the combination hole 54 and is threadedly connected to the combination hole 53 to achieve combination; the combination hole 53 may also be a radial through hole, and the clutch sleeve 52 is provided with two opposite combination holes 54 corresponding to the combination hole 53, and the combination pin passes through the combination hole 53 and the two combination holes 54 to achieve combination. Both of the above two implementations are within the protection scope of the present invention, and this embodiment only illustrates the latter.

[0039] like Figure 4 As shown, a grinding mounting seat 6 for mounting a grinding device 7 is fixedly provided on the lower box 91, and the grinding device 7 is used to grind the blade of the fine-crushing movable knife 3 along the axial direction parallel to the fine-crushing rotating shaft 1. In actual operation, the fine-crushing rotating shaft 1 is usually arranged horizontally, so the grinding device 7 can be easily installed in a posture of grinding along the axial direction of the fine-crushing rotating shaft 1 based on the horizontal arrangement, and since the blade line of the fine-crushing movable knife 3 is parallel to the axis of the fine-crushing rotating shaft 1, the grinding device 7 can easily directly form a straight line grinding along the blade line direction of the fine-crushing movable knife 3.

[0040] like Figures 4 to 6 As shown, the grinding device 7 of this embodiment includes a grinding base 71 for fixedly connecting with the grinding mounting seat 6, a grinding reciprocating seat 72 is mounted on the grinding base 71, the reciprocating direction of the grinding reciprocating seat 72 is parallel to the axial direction of the fine crushing shaft 1, and a reciprocating driver 73 is arranged between the grinding reciprocating seat 72 and the grinding base 71; a grinding wheel 74 is rotatably mounted on the grinding reciprocating seat 72, and the grinding wheel 74 is connected to a grinding driver 75. The grinding driver 75 drives the grinding wheel 74 to rotate at a high speed, and the reciprocating driver 73 drives the grinding reciprocating seat 72 to reciprocate, and the grinding wheel 74 grinds the blade of the fine crushing movable knife 3.

[0041] The grinding reciprocating seat 72 can be guided by a guide rod sleeve or a guide rail slide to form a reciprocating motion. This embodiment is illustrated by a guide rod sleeve. The reciprocating drive 73 can be implemented by a motor-coordinated transmission or the like. This embodiment is illustrated by a motor-coordinated spiral transmission. The grinding drive 75 can be implemented by a motor-coordinated transmission or the like. This embodiment is illustrated by a motor-coordinated belt transmission.

[0042] Preferably, a vertically movable grinding lifting seat 76 is installed on the grinding reciprocating seat 72, and the vertical movement is realized by a guide rod sliding sleeve or a guide rail sliding seat and the like, which is not limited here; the grinding wheel 74 and the grinding driver 75 are installed on the grinding lifting seat 76, and a lifting height adjuster 77 is provided between the grinding lifting seat 76 and the grinding reciprocating seat 72. The height of the grinding lifting seat 76 is adjusted by the lifting height adjuster 77, so that the grinding wheel 74 can be lifted to a suitable height for grinding the fine crushing movable knife 3. The lifting height adjuster 77 can be realized by a hand wheel in combination with a spiral transmission structure, and the required height is maintained by the self-locking property of the spiral transmission after adjustment.

[0043] Preferably, a distance adjustment structure 78 for adjusting the distance between the grinding wheel 74 and the fine-crushing movable knife 3 is provided between the grinding base 71 and the grinding mounting seat 6. The position of the grinding base 71 is adjusted by the distance adjustment structure 78, so that the grinding wheel 74 reaches a suitable distance for grinding the fine-crushing movable knife 3. In practical applications, the distance adjustment structure 78 and the lifting height adjuster 77 are used in conjunction with each other, so that the grinding wheel 74 is finally in a suitable position for grinding the blade of the fine-crushing movable knife 3. The distance adjustment structure 78 of this embodiment includes a base fastening bolt installed on the grinding mounting seat 6, and a base mounting through hole corresponding to the base fastening bolt is provided on the grinding base 71. The base mounting through hole is arranged in the form of a long hole arranged in a direction close to or away from the rotor 2. The base fastening bolt is fastened at different positions of the base mounting through hole to achieve the above-mentioned fine-tuning operation of making the grinding wheel 74 close to or away from the fine-crushing movable knife 3.

[0044] In this embodiment, when fine crushing is performed, the grinding clutch device 51 is disengaged, the fine crushing driving device 11 drives the rotor 2 to rotate at a high speed, and the fine crushing fixed blade 4 and the fine crushing movable blade 3 perform continuous and efficient fine crushing in the fine crushing space 93 .

[0045] When the tool needs to be sharpened, the crushing operation stops and the sharpening operation includes the following steps.

[0046] Step 1: Remove the upper box 92 to expose the upper half of the rotor 2. In actual production, the side walls of the upper box 92 and the lower box 91 are both provided with semicircular grooves corresponding to the crushing shaft 1. When the two boxes are installed together, the two semicircular grooves form the through holes of the crushing shaft 1. After the upper box 92 is removed, the upper half of the crushing shaft 1 is exposed, and correspondingly, the upper half of the rotor 2 is exposed.

[0047] Step 2: The grinding clutch device 51 is engaged. The principle of this engagement has been described above and will not be repeated here. The grinding device 7 is installed on the grinding mounting seat 6. During the installation process, the height of the grinding wheel 74 is adjusted using the lifting height adjuster 77 according to the required grinding position of the grinding wheel 74. After adjusting the distance position of the grinding wheel 74, the base fastening bolts are fixed to the base mounting holes.

[0048] Step 3: The grinding drive device 5 drives the rotor 2 to rotate until one of the fine crushing movable knives 3 on the upper part of the rotor 2 reaches the grinding position of the grinding device 7 and stops.

[0049] Step 4: the grinding device 7 grinds the movable fine-crushing knife 3 along the axial direction of the fine-crushing shaft 1. The grinding process is that the reciprocating driver 73 drives the grinding reciprocating seat 72 to reciprocate, so that the grinding wheel 74 grinds the blade of the movable fine-crushing knife 3.

[0050] According to step three and step four, each of the fine crushing movable knives 3 is polished in sequence until all of the fine crushing movable knives 3 are polished.

[0051] Based on the fact that grinding is mainly for grinding the back of the blade of the fine-crushing movable knife 3, preferably, in step 3, the grinding drive device 5 drives the rotor 2 to rotate in the opposite direction to the rotation direction of the rotor 2 during the fine-crushing operation, and of course the rotation speed is also low, such as 3r / min; the grinding wheel 74 in the grinding device 7 moves into the grinding range before the fine-crushing movable knife 3 arrives, and the rotor 2 stops with the blade of the fine-crushing movable knife 3 against the grinding wheel 74 of the grinding device 7. After stopping, the posture at the time of stopping can be fixed by a brake mechanism, etc., to ensure the stability of the fine-crushing movable knife 3 during the reciprocating grinding process. This brake mechanism can be realized by using a grinding drive motor with a brake function. Of course, after grinding one of the fine-crushing movable knives 3, the grinding wheel 74 is driven to leave the grinding range, and the rotor 2 can be driven to continue to rotate. After the fine-crushing movable knife 3 crosses the range of the grinding wheel 74, the grinding wheel 74 is driven back to the grinding range, and the next fine-crushing movable knife 3 is stopped.

[0052] The grinding range is the range in which the grinding wheel 74 can grind the blade of the pulverizing movable knife 3, which is mainly the linear range in which the grinding wheel 74 reciprocates within the blade line length of the pulverizing movable knife 3. Therefore, the drive to leave and return to the grinding range can be achieved by driving the reciprocating driver 73 to drive the grinding wheel 74 to leave or return to the blade range horizontally, or by driving the lifting height adjuster 77 to drive the grinding wheel 74 to leave or return to the grinding position vertically, which is not limited here.

[0053] The movable fine-crushing knife 3 is ground by the above structural principle, and there are only two fixed fine-crushing knives 4, which can be disassembled and ground separately. After grinding, there is a certain amount of grinding on the blade of the tool, such as Figure 2 and Figure 4 As shown, in this embodiment, a fine crushing gap adjustment structure 8 is provided between the fine crushing fixed knife 4 and the lower box body 91. After the fine crushing fixed knife 4 is polished, the position of the fine crushing fixed knife 4 is adjusted by the fine crushing gap adjustment structure 8 so that the required fine crushing gap can still be maintained between the fine crushing movable knife 3 and the fine crushing fixed knife 4.

[0054] The fine-crushing gap adjustment structure 8 of this embodiment includes fixed knife fastening bolts 81 sequentially installed on the lower box body 91 along the blade line direction of the fine-crushing fixed knife 4. The fine-crushing fixed knife 4 is provided with fixed knife installation holes 82 corresponding to each of the fixed knife fastening bolts 81. The fixed knife installation holes 82 are arranged as long holes perpendicular to the blade line direction of the fine-crushing fixed knife 4. The fine-crushing fixed knife 4 is also fastened to different positions of the fixed knife installation holes 82 by the fixed knife fastening bolts 81 to achieve adjustment close to or away from the fine-crushing movable knife 3, that is, to achieve adjustment of the fine-crushing gap between the fine-crushing movable knife 3 and the fine-crushing fixed knife 4.

[0055] A fixed blade limiting nut 83 is fixedly provided on the lower box body 91 at the side of the fine-crushing fixed blade 4 away from the rotor 2. A gap maintaining bolt 84 for pressing against the fine-crushing fixed blade 4 is installed on the fixed blade limiting nut 83. The rigid pressing of the gap maintaining bolt 84 prevents the fine-crushing fixed blade 4 from retreating due to the reaction force during the shearing and fine-crushing process, thereby ensuring the stability of the fine-crushing gap and the long-term and reliable operation of the fine-crushing operation. The threaded connection between the gap maintaining bolt 84 and the fixed blade limiting nut 83 is convenient for adjusting the position of the fine-crushing fixed blade 4 during the gap adjustment process, so that it can always keep pressing against the fine-crushing fixed blade 4.

[0056] In this embodiment, the movable fine-crushing knife 3 is arranged to be parallel to the axis of the fine-crushing shaft 1, and the fixed fine-crushing knife 4 is arranged to be oblique. The two can form a sequential shearing effect, and at the same time, the installed grinding device 7 can grind the movable fine-crushing knife 3 online in a direction parallel to the axis of the fine-crushing shaft 1, without the need to disassemble and assemble the rotor 2. By relying on the grinding drive device 5 to switch the movable fine-crushing knife 3 online, the grinding of all the movable fine-crushing knives 3 can be completed in sequence, and the grinding efficiency is significantly improved. The single grinding operation can be reduced to 0.5h to complete, and the labor intensity is also reduced. The mechanized grinding operation is realized as a whole, and the safety hazard is reduced. Moreover, because the grinding device 7 realizes mechanical linear grinding, the grinding straightness is good, which is conducive to forming a uniform fine-crushing gap with the fixed fine-crushing knife 4, and the grinding effect is good.

[0057] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A waste tire shredder, comprising a lower box and an upper box for enclosing a shredding space, wherein a shredding shaft is mounted on the lower box, and a rotor located in the shredding space is fixed on the shredding shaft, characterized in that: The rotor is fixedly mounted with a plurality of circumferentially evenly distributed fine-crushing movable knives, the blade lines of which are arranged parallel to the axis of the fine-crushing rotating shaft; the lower box is fixedly mounted with a fine-crushing fixed knife, the blade line of which is arranged obliquely to intersect with the blade line of the fine-crushing movable knife; The fine crushing shaft is connected to a fine crushing drive device, a grinding drive device is installed on the lower box body, a grinding clutch device is provided between the output shaft of the grinding drive device and the fine crushing shaft, the grinding clutch device is separated during fine crushing operation and engaged during grinding operation; a grinding mounting seat for mounting a grinding device is fixedly provided on the lower box body, the grinding device is used to grind the blade of the fine crushing movable knife along the axial direction parallel to the fine crushing shaft.

2. The waste tire crusher according to claim 1, characterized in that: The grinding device includes a grinding base fixedly connected to the grinding mounting seat, a grinding reciprocating seat is installed on the grinding base, the reciprocating direction of the grinding reciprocating seat is parallel to the axial direction of the crushing shaft, and a reciprocating drive is provided between the grinding reciprocating seat and the grinding base; a grinding wheel is rotatably mounted on the grinding reciprocating seat, and the grinding wheel is connected to the grinding drive.

3. The waste tire shredder according to claim 2, characterized in that: A vertically movable grinding lifting seat is installed on the grinding reciprocating seat, the grinding wheel and the grinding driver are installed on the grinding lifting seat, and a lifting height adjuster is arranged between the grinding lifting seat and the grinding reciprocating seat.

4. The waste tire crusher according to claim 2, characterized in that: A distance adjustment structure for adjusting the distance between the grinding wheel and the fine crushing movable knife is provided between the grinding base and the grinding mounting seat.

5. The waste tire shredder according to claim 1, characterized in that: The grinding clutch device includes a connecting hole radially arranged at the end of the crushing shaft, and a clutch sleeve sleeved on the corresponding end of the crushing shaft is fixedly provided on the output shaft of the grinding drive device, and the clutch sleeve is provided with a connecting through hole corresponding to the connecting hole, and a connecting pin passing through the connecting through hole is installed on the connecting hole.

6. The waste tire shredder according to claim 1, characterized in that: A fine crushing gap adjustment structure is provided between the fine crushing fixed knife and the lower box body.

7. The waste tire shredder according to claim 6, characterized in that: The fine crushing gap adjustment structure includes fixed knife fastening bolts installed in sequence on the lower box body along the blade line direction of the fine crushing fixed knife, the fine crushing fixed knife is provided with fixed knife mounting through holes corresponding to each of the fixed knife fastening bolts, and the fixed knife mounting through holes are arranged in the form of long holes perpendicular to the blade line direction of the fine crushing fixed knife; a fixed knife limiting nut is fixedly provided on the lower box body at a side of the fine crushing fixed knife away from the rotor, and a gap maintaining bolt for pressing against the fine crushing fixed knife is installed on the fixed knife limiting nut.

8. The waste tire shredder according to claim 1, characterized in that: A fine crushing feeding device is provided on the top of the upper box body.

9. The waste tire shredder according to any one of claims 1 to 8, characterized in that: The grinding operation includes the following steps: Step 1: remove the upper box to expose the upper part of the rotor; Step 2: The grinding clutch device is combined, and the grinding device is installed on the grinding mounting seat; Step 3: The grinding drive device drives the rotor to rotate until one of the fine crushing movable knives on the upper part of the rotor reaches the grinding position of the grinding device and stops; Step 4: the grinding device grinds the fine-crushing movable knife along the axial direction of the fine-crushing rotating shaft; According to step three and step four, each of the fine crushing movable knives is polished in sequence until all the fine crushing movable knives are polished.

10. The waste tire shredder according to claim 9, characterized in that: In step three, the grinding drive device drives the rotor to rotate in a direction opposite to the rotation direction of the rotor during fine crushing operation, and the grinding wheel in the grinding device moves into the grinding range before the fine crushing movable knife arrives, and the rotor stops with the blade of the fine crushing movable knife resting on the grinding wheel of the grinding device.

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