A spiral blade variable pitch garbage fine pulverizing device and garbage treatment method

Abstract

The present invention relates to the technical field of garbage disposal, and in particular to a spiral blade variable pitch garbage fine pulverizing device and a garbage disposal method. The spiral blade variable pitch garbage fine pulverizing device comprises: a shell assembly, a pitch adjustment unit installed on the shell assembly, and a cylindrical filter screen arranged at the first end of the shell assembly; a gear set is arranged in the shell assembly, a motor shaft is arranged in the center of the shell assembly, the motor shaft is connected to the pitch adjustment unit and the gear set, a plurality of reamers are arranged in an array around the center circumference of the filter screen in the filter screen, and the plurality of reamers are connected to the gear set; the rotation of the motor shaft drives the reamers to rotate through the gear set, and at the same time, the motor shaft drives the plurality of reamers to move closer to or away from the center of the filter screen through the pitch adjustment unit. The pulverizing device solves the problem of a long processing time caused by repeated pulverizing when the existing pulverizer pulverizes garbage that occupies a large space.

Description

Technical Field

[0001] The invention relates to the technical field of garbage disposal, and in particular to a spiral blade variable pitch garbage fine crushing device and a garbage disposal method. Background Art

[0002] The information disclosed in this background technology section is only intended to enhance the understanding of the overall background of the invention, and should not necessarily be regarded as an admission or any form of suggestion that the information constitutes the prior art already known to a person skilled in the art.

[0003] With the rapid development of my country's social economy, the acceleration of urbanization and the rapid improvement of people's living standards, the garbage and waste generated in the process of urban production and life have also increased rapidly. The situation of domestic garbage occupying land, polluting the environment and affecting people's health has become more and more obvious. The massive increase in urban domestic garbage has made garbage disposal more and more difficult, and the resulting environmental pollution and other problems have gradually attracted widespread attention from all walks of life.

[0004] Double roller shredders are generally used for industrial materials such as mining, chemicals, cement, and building materials. If they are used for ordinary household garbage, it will cause a waste of resources. However, the existing garbage shredders have low shredding efficiency. For example, garbage such as plastic bottles takes up a lot of space. In ordinary shredders, it is necessary to shred repeatedly to ensure the shredding accuracy, resulting in a long processing time. Summary of the invention

[0005] In view of the deficiencies in the prior art, an embodiment of the present invention aims to provide a spiral blade variable pitch garbage fine shredding device to solve the problem of long processing time caused by repeated shredding when the existing shredder shreds garbage that occupies a large space.

[0006] In order to achieve the above objectives, the embodiments of the present invention provide the following technical solutions:

[0007] A spiral blade variable pitch garbage fine pulverizing device comprises: a shell assembly, a pitch adjusting unit installed on the shell assembly and a cylindrical filter screen arranged at the first end of the shell assembly; a gear group is arranged in the shell assembly, a motor shaft is arranged in the center of the shell assembly, the motor shaft is connected to the pitch adjusting unit and the gear group, a plurality of reamers are arranged in an array around the center circumference of the filter screen in the filter screen, and the plurality of reamers are connected to the gear group; the motor shaft rotates to drive the reamers to rotate through the gear group, and at the same time, the motor shaft makes the plurality of reamers approach or move away from the center of the filter screen through the pitch adjusting unit.

[0008] In another preferred embodiment of the present invention, the gear set includes a main gear, an intermediate gear and a final gear, the motor shaft is connected to the main gear, the intermediate gear has a plurality of gears distributed around the main gear and meshing with the main gear, the number of the final gears is the same as the number of the intermediate gears, and each final gear is respectively meshed with an intermediate gear and connected to a reamer.

[0009] In another preferred embodiment of the present invention, two main gears are arranged along the length direction of the filter, a plurality of intermediate gears are staggered along the length direction of the filter, each meshing with one of the two main gears, and a plurality of final gears are staggered along the length direction of the filter.

[0010] In another preferred embodiment of the present invention, the pitch adjusting unit includes a pitch adjusting wheel arranged in a housing assembly, a through hole for passing the main gear transmission shaft is arranged at the center of the pitch adjusting wheel, rotating holes for passing the intermediate gear transmission shaft are arranged circumferentially along the center of the pitch adjusting wheel, and an arc groove for passing the final gear transmission shaft with the rotating hole as the center; under the rotation of the motor shaft, the pitch adjusting wheel rotates reciprocatingly, so that the multiple reamers are close to or away from the center of the filter.

[0011] In another preferred embodiment of the present invention, the pitch adjusting unit includes a pitch adjusting rack, the pitch adjusting wheel is circular, a gear segment is arranged on the circular outer circumference, the pitch adjusting rack is meshed with the gear segment of the pitch adjusting wheel, and the pitch adjusting rack performs linear reciprocating motion under the rotation of the motor shaft, thereby driving the pitch adjusting wheel to perform reciprocating rotation.

[0012] In another preferred embodiment of the present invention, the distance adjusting unit also includes a distance adjusting cam and a distance adjusting connecting rod; a first swinging groove is arranged in the middle of the distance adjusting connecting rod, a second swinging groove is arranged at the first end, and an adjustment hole is arranged at the second end; the distance adjusting cam is connected to the motor shaft, the distance adjusting cam is a C-shaped structure, connected in the middle by a swinging shaft, the swinging shaft passes through the first swinging groove of the distance adjusting connecting rod, and the adjustment hole of the distance adjusting connecting rod is rotatably connected to the end face of the shell assembly through a pin shaft; the distance adjusting rack protrudes from the connecting shaft and passes through the second swinging groove of the distance adjusting connecting rod; the rotation of the motor shaft drives the distance adjusting cam to rotate, thereby driving the distance adjusting connecting rod to swing, thereby driving the distance adjusting rack to perform linear reciprocating motion.

[0013] In another preferred embodiment of the present invention, the shell assembly includes a first shell and a second shell arranged opposite to each other; the centers of the two shells have a through hole that passes through the motor shaft, and the inward end faces of the shells are provided with an annular groove and a plurality of strip grooves, the annular groove is used to install the transmission shaft of the intermediate gear, and the strip grooves are arranged radially for installing the transmission shaft of the final gear, wherein the strip groove of the second shell is a through groove.

[0014] In another preferred embodiment of the present invention, a flat notch is provided on the outer periphery of the first shell, and the pitch adjustment unit includes a pitch adjustment wheel arranged in the shell assembly, the pitch adjustment wheel is circular, and a gear segment is provided on the circular outer periphery, and the gear segment leaks out through the flat notch of the first shell.

[0015] In another preferred embodiment of the present invention, an arcuate circular groove is provided on the end surface of the second shell away from the first shell, and the cylindrical filter is installed in the arcuate circular groove and can rotate in the arcuate circular groove.

[0016] The embodiment of the present invention also provides a garbage treatment method using the above-mentioned spiral blade variable pitch garbage fine shredding device, wherein the circumferentially arranged reamers move away from or close to the center while rotating, and gradually squeeze and shred the garbage when moving close to the center.

[0017] One or more technical solutions provided in the embodiments of the present invention have at least the following technical effects or advantages:

[0018] 1. After the garbage is put into the crushing device of the present invention, the reamer gradually approaches the center while rotating, slowly squeezes the garbage, and gradually cuts from the outside of the garbage to the inside, and crushes the garbage from multiple angles. The reamer moves from far to near and the reamer rotates to achieve cutting and squeezing of the garbage to be crushed from the outside to the inside, which reduces the time consumption and improves the shredding efficiency.

[0019] 2. The present invention arranges two main gears along the length direction and staggers the intermediate gears and the final gears along the length direction, thereby avoiding the phenomenon that the final gears hit the non-meshing intermediate gears and the main gears on one side when moving close to the center, and increases the adjustable length of the reamer, which is convenient for squeezing and cutting relatively small garbage.

[0020] 3. In the crushing device of the present invention, the rotation of the motor shaft drives the pitch-adjusting cam to rotate, the pitch-adjusting cam drives the pitch-adjusting connecting rod to swing at a certain angle, the swing of the pitch-adjusting connecting rod drives the pitch-adjusting rack to make reciprocating linear motion, and then drives the pitch-adjusting wheel to rotate back and forth, and the rotation of the pitch-adjusting wheel drives the reamer to reciprocate close to and away from the center of the filter. Through the coordination of the pitch-adjusting cam, the pitch-adjusting connecting rod, the pitch-adjusting rack, the pitch-adjusting wheel and the gear set, the reamer can move close to or away from the center while rotating, so as to achieve cutting and squeezing of the garbage to be crushed from the outside to the inside, thereby improving the shredding efficiency.

[0021] 4. The present invention arranges the filter to rotate relative to the housing assembly, so that the uncrushed garbage is driven upward from the bottom of the filter as the filter rotates, and falls back into the reamer when the reamer is opened for further crushing, thereby improving the crushing accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0023] Figure 1 is an overall schematic diagram of a crushing device according to an embodiment of the present invention;

[0024] Figure 2 is a schematic diagram of a crushing device from another perspective of an embodiment of the present invention;

[0025] Figure 3 is a schematic diagram of a first shell of a crushing device according to an embodiment of the present invention;

[0026] Figure 4 is a schematic diagram of a second shell of a crushing device according to an embodiment of the present invention;

[0027] Figure 5 is a schematic diagram of the interior of the first shell of the crushing device according to an embodiment of the present invention;

[0028] Figure 6 is a schematic diagram of a gear set of a crushing device according to an embodiment of the present invention;

[0029] Figure 7 Schematic diagram of the inner side distance adjustment unit of the crushing device according to an embodiment of the present invention;

[0030] Figure 8 Schematic diagram of the pitch-adjustable wheel disc of the crushing device according to an embodiment of the present invention;

[0031] Fig. 9 Schematic diagram of the outer spacing adjustment unit of the crushing device according to an embodiment of the present invention;

[0032] Fig.10 2 is a schematic diagram of a distance adjustment cam of a crushing device according to an embodiment of the present invention;

[0033] In the figure: 1, pitch-adjusting screw; 2, motor shaft; 3, pitch-adjusting cam; 4, pitch-adjusting connecting rod; 5, fixed frame; 6, pitch-adjusting rack; 7, filter screen; 8, first housing; 9, second housing; 10, pitch-adjusting wheel; 11, final transmission shaft; 12, intermediate transmission shaft; 13, main transmission shaft; 14, main gear; 15, intermediate gear; 16, final gear; 17, annular groove; 18, strip groove; 19, rotating hole; 20, arc groove; 21, reamer; 22, second swing groove; 23, first swing groove; 24, adjustment hole; 25, swing shaft; 26, arc-shaped circular groove;

[0034] In order to show the positions of various parts, the distances or sizes between them are exaggerated and the schematic diagram is for reference only. DETAILED DESCRIPTION

[0035] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0036] For the convenience of description, if the words "up", "down", "left" and "right" appear in the present invention, they only indicate that they are consistent with the up, down, left and right directions of the drawings themselves, and do not limit the structure. They are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0037] Terminology explanation section: The terms "install", "connected", "connect", "fixed" and the like in the present invention should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral whole; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium; it can be an internal connection between two elements, or an interaction relationship between two elements. For ordinary technicians in this field, the specific meaning of the terms in the present invention can be understood according to the specific circumstances.

[0038] As introduced in the background technology, plastic bottles and other garbage take up a large space, and in ordinary shredders, they need to be shredded repeatedly to ensure the shredding accuracy, resulting in a long processing time. In order to solve the above technical problems, the present invention proposes a spiral blade variable pitch garbage shredding device, which can be directly installed as a component in a garbage recycling truck to directly shred the garbage.

[0039] like Figure 1-Figure 10 As shown, in one embodiment of the present invention, a spiral blade variable pitch garbage fine pulverizing device is recorded, comprising: a shell assembly, a pitch adjusting unit installed on the shell assembly, and a cylindrical filter screen 7 arranged at the first end of the shell assembly; a gear group is arranged in the shell assembly, a motor shaft is arranged in the center of the shell assembly, the motor shaft is connected to the pitch adjusting unit and the gear group, a plurality of reamers 21 are arranged in an array around the center circumference of the filter screen 7 in the filter screen 7, and the plurality of reamers 21 are all connected to the gear group; the rotation of the motor shaft drives the reamers 21 to rotate through the gear group, and at the same time, the motor shaft makes the plurality of reamers 21 approach or move away from the center of the filter screen 7 through the pitch adjusting unit.

[0040] After the garbage is put into the shredder device of the present invention, the reamer gradually approaches the center while rotating, slowly squeezes the garbage, and gradually cuts from the outside of the garbage to the inside, and shreds the garbage from multiple angles. The reamer moves from far to near and the reamer rotates to achieve cutting and squeezing of the garbage to be shredded from the outside to the inside, which reduces the time consumption and improves the shredding efficiency.

[0041] like Figure 5 , Figure 6 As shown, the gear set includes a main gear 14, an intermediate gear 15 and a final gear 16, the motor shaft is connected to the main gear 14, the intermediate gear 15 has a plurality of gears distributed around the main gear 14 and meshing with the main gear 14, the number of the final gears 16 is the same as the number of the intermediate gears 15, each final gear 16 is respectively meshed with an intermediate gear 15 and connected to a reamer 21. Two main gears 14 are arranged along the length direction of the filter screen 7, and the plurality of intermediate gears 15 are staggered along the length direction of the filter screen 7, respectively meshing with one of the two main gears 14, and the plurality of final gears 16 are staggered along the length direction of the filter screen 7.

[0042] In the present invention, two main gears 14 are installed and arranged in a staggered manner, so that the final gear 16 will not have a tooth collision with the main gear 14 during the revolution, thereby increasing the distance adjustment length of the center distance. Furthermore, in order for the reamer to rotate at a high speed to cut the garbage, the gear transmission process needs to have a speed-increasing characteristic, so the main gear is larger than the intermediate gear and larger than the final gear.

[0043] like Figure 5 , Figure 8 As shown, the pitch adjusting unit includes a pitch adjusting wheel 10 arranged in a housing assembly, a through hole for passing the transmission shaft of the main gear 14 is arranged at the center of the pitch adjusting wheel 10, a rotating hole 19 for passing the transmission shaft of the intermediate gear 15 is arranged circumferentially along the center of the pitch adjusting wheel 10, and an arc groove 20 for passing the transmission shaft of the final gear 16 with the rotating hole 19 as the center; under the rotation of the motor shaft, the pitch adjusting wheel 10 reciprocates, so that the multiple reamers 21 are close to or away from the center of the filter screen 7.

[0044] like Figure 1 , Fig. 9 As shown, the pitch adjusting unit includes a pitch adjusting rack 6, and the pitch adjusting wheel 10 is circular, with a gear segment arranged on the circular outer circumference. The pitch adjusting rack 6 is meshed with the gear segment of the pitch adjusting wheel 10. Under the rotation of the motor shaft, the pitch adjusting rack 6 performs a linear reciprocating motion, thereby driving the pitch adjusting wheel 10 to perform a reciprocating rotation.

[0045] like Figure 1 , Figure 7 , Fig. 9 , Fig.10As shown, the distance adjusting unit also includes a distance adjusting cam 3 and a distance adjusting connecting rod 4; a first swinging groove 23 is arranged in the middle of the distance adjusting connecting rod 4, a second swinging groove 22 is arranged at the first end, and an adjustment hole 24 is arranged at the second end; the distance adjusting cam 3 is connected to the motor shaft, and the distance adjusting cam 3 is a C-shaped structure, connected in the middle by a swinging shaft 25, the swinging shaft 25 passes through the first swinging groove 23 of the distance adjusting connecting rod 4, and the adjustment hole 24 of the distance adjusting connecting rod 4 is rotatably connected to the end face of the housing component through the distance adjusting screw 1; the distance adjusting rack 6 extends out of the connecting shaft and passes through the second swinging groove 22 of the distance adjusting connecting rod 4; the rotation of the motor shaft drives the distance adjusting cam 3 to rotate, thereby driving the distance adjusting connecting rod 4 to swing, thereby driving the distance adjusting rack 6 to perform linear reciprocating motion.

[0046] In the crushing device of the present invention, the rotation of the motor shaft drives the pitch-adjusting cam to rotate, the pitch-adjusting cam drives the pitch-adjusting connecting rod to swing at a certain angle, the swing of the pitch-adjusting connecting rod drives the pitch-adjusting rack to make reciprocating linear motion, and then drives the pitch-adjusting wheel to rotate reciprocatingly, and the rotation of the pitch-adjusting wheel drives the reamer to reciprocate towards and away from the center of the filter.

[0047] By adjusting the assembly position of the pitch-adjusting connecting rod 4 and the pitch-adjusting screw 1, the pitch-adjusting screw is located in different adjustment holes, thereby changing the swing angle of the pitch-adjusting connecting rod 4, thereby changing the stroke of the pitch-adjusting rack 6, and finally changing the farthest distance of the five reamers 21 from the center of the circle.

[0048] like Figure 3 , Figure 4 As shown, the housing assembly includes a first housing 8 and a second housing 9 that are arranged opposite to each other; a through hole is provided in the center of the two housings to pass through the motor shaft, and an annular groove 17 and a plurality of strip grooves 18 are provided on the inward end faces of the housings, wherein the annular groove 17 is used to install the transmission shaft of the intermediate gear 15, and the strip grooves 18 are arranged radially to install the transmission shaft of the final gear 16, wherein the strip groove 18 of the second housing 9 is a through groove.

[0049] like Figure 2 As shown, the end surface of the second housing 9 away from the first housing 8 is provided with an arc groove 26, and the cylindrical filter screen 7 is installed in the arc groove and can rotate in the arc groove. The filter screen shown is an annular cylindrical shape, and a plurality of circular and elongated through holes are provided on the filter screen.

[0050] During the crushing process, some garbage larger than the mesh of the filter falls from the gap of the reamer but cannot pass through the mesh. The filter 7 is designed with a rotation function, and the garbage that does not meet the size standard will be crushed again, and the garbage that meets the size standard will be thrown out through the filter 7 by centrifugal force.

[0051] According to the attached Figure 1In the orientation in the middle, the device is mainly composed of a motor shaft 2, a pitch adjusting cam 3, a pitch adjusting screw 1, a pitch adjusting connecting rod 4, a fixed frame 5, a pitch adjusting rack 6, a first shell 8, a pitch adjusting wheel 10, a main gear 14, an intermediate gear 15, a final gear 16, a main transmission shaft 13, an intermediate transmission shaft 12, a final transmission shaft 11, a second shell 9, a reamer 21, a filter 7 and other parts from left to right, wherein the fixed frame is fixed on the garbage collection truck.

[0052] The device motor shaft 2 is divided into two sections, front and rear, which are connected in the middle by a pitch-adjusting cam 3. The front motor shaft 2 is connected to the driving motor, and the rear motor shaft 2 passes through the middle hole axis of the first shell 8 and the pitch-adjusting wheel 10, and is connected to the two main gears 14 at the rear end through a gear key.

[0053] like Figure 3 As shown, the first shell 8 is disc-shaped, hollow in the middle, cross-cut on the side, and the central angle of the minor arc is 20°; an annular groove 17 and a strip groove 18 are provided in the middle, in the shape of a circular ring and five circumferential straight line segments pointing outward from the center of the circle, and the annular groove and the strip groove do not penetrate the shell.

[0054] like Figure 7 , Figure 8 As shown, the pitch-adjustable wheel 10 is also designed in a disc shape, wherein a 73° edge is a gear; five rotating holes are equidistantly arranged around the center of the disc for passing the intermediate transmission shaft 12; a circle is drawn with the center of each rotating hole as the center, and a minor arc is taken as a motion slot for the final transmission shaft 11.

[0055] like Figure 5 , Figure 6 As shown, the main transmission shaft 13, the intermediate transmission shaft 12, and the final transmission shaft 11 are respectively installed in the middle hole, the rotating hole, and the arc groove of the pitch wheel 10, and the main gear 14, the intermediate gear 15, and the final gear 16 are respectively fixed on the main transmission shaft 13, the intermediate transmission shaft 12, and the final transmission shaft 11. One end of the intermediate transmission shaft 12 is placed in the annular groove of the second housing 9, and the other end is placed in the annular groove of the first housing 8; the final transmission shaft 11 can slide in the arc groove, one end of the final transmission shaft 11 is placed in the linear groove of the first housing 8, and the other end is placed in the linear groove of the second housing 9 and connected to the reamer 21.

[0056] like Figure 3 , Figure 4 As shown, the first shell 8 and the second shell 9 are similar in shape, the difference is that the second shell 9 is a complete disc, and the strip groove is a through groove.

[0057] The end of the reamer 21 is connected to the final transmission shaft 11 . The reamer 21 is spiral-shaped and there are five of them in total.

[0058] The first swinging groove is provided in the middle of the pitch-adjusting link 4, which is connected to the swinging shaft in the pitch-adjusting cam 3 and can rotate around the swinging shaft; the tail end of the pitch-adjusting link 4 is fixed to the end face of the first housing 8 by the pitch-adjusting screw 1; the top end is connected to the pitch-adjusting rack 6 to drive the pitch-adjusting rack 6 to reciprocate. The pitch-adjusting rack 6 is meshed with the gear segment of the pitch-adjusting wheel 10, and the reciprocating motion of the pitch-adjusting rack 6 drives the pitch-adjusting wheel 10 to reciprocate and rotate.

[0059] The working process is as follows:

[0060] The main movement of the reamer 21 can be divided into two processes: revolution and rotation. For the convenience of description, the movement is divided into two parts: revolution and rotation. In the actual movement process, the revolution and rotation are carried out simultaneously.

[0061] The process of the revolution of the reamer 21 is as follows: the motor drives the motor shaft 2 to rotate, thereby driving the pitch-adjusting cam 3 to rotate, and the pitch-adjusting cam 3 drives the pitch-adjusting connecting rod 4 to swing at a certain angle; the swing of the pitch-adjusting connecting rod 4 drives the pitch-adjusting rack 6 to make reciprocating linear motion, and then drives the pitch-adjusting wheel 10 to reciprocate; when the pitch-adjusting wheel 10 rotates, the arc groove 20 thereon squeezes the final transmission shaft 11, so that the final transmission shaft 11 will make reciprocating linear motion along the straight strip grooves of the first shell 8 and the second shell 9, thereby driving the reamer 21 to reciprocate close to and away from the center of the filter screen, realizing the revolution of variable distance.

[0062] The rotation process of the reamer 21 is as follows: the motor drives the motor shaft 2 to rotate, thereby driving the main gear 14 to rotate, thereby driving the intermediate gear 15 to rotate, thereby driving the final gear 16 to rotate, thereby driving the final transmission shaft 11 to rotate, and thereby driving the reamer 21 to rotate.

[0063] When the five reamers 21 are at the farthest point from the center, the garbage to be crushed enters from the opening end of the filter screen 7 (such as Figure 2 The reamer 21 revolves gradually toward the center, slowly squeezing the garbage, and at the same time, the five reamers 21 rotate to crush the garbage from five angles.

[0064] Although the above describes the specific implementation mode of the present invention in conjunction with the accompanying drawings, it is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art on the basis of the technical solution of the present invention without creative work are still within the scope of protection of the present invention.

Claims

1. A spiral blade variable pitch garbage fine pulverizing device, characterized in that: include: A housing assembly, a distance adjusting unit mounted on the housing assembly, and a cylindrical filter screen disposed at a first end of the housing assembly; A gear set is arranged in the housing assembly, a motor shaft is arranged in the center of the housing assembly, the motor shaft is connected to the pitch adjustment unit and the gear set, a plurality of reamers are arranged in an array around the center circumference of the filter screen, and the plurality of reamers are connected to the gear set; The motor shaft rotates through the gear set to drive the reamer to rotate, and at the same time, the motor shaft makes the multiple reamers approach or move away from the center of the filter screen through the distance adjustment unit; The gear set includes a main gear, an intermediate gear and a final gear, the motor shaft is connected to the main gear, the intermediate gear has a plurality of gears distributed around the main gear and meshing with the main gear, the number of the final gears is the same as the number of the intermediate gears, each final gear is meshed with an intermediate gear and connected to a reamer; The pitch adjusting unit comprises a pitch adjusting wheel arranged in a housing assembly, a through hole for passing the main gear transmission shaft is arranged at the center of the pitch adjusting wheel, rotating holes for passing the intermediate gear transmission shaft are arranged circumferentially along the center of the pitch adjusting wheel, and an arc groove for passing the final gear transmission shaft with the rotating hole as the center; under the rotation of the motor shaft, the pitch adjusting wheel rotates back and forth, so that the multiple reamers are close to or away from the center of the filter screen.

2. The spiral blade variable pitch garbage fine pulverizing device according to claim 1, characterized in that: Two main gears are arranged along the length direction of the filter screen, a plurality of intermediate gears are arranged alternately along the length direction of the filter screen, and are respectively meshed with one of the two main gears, and a plurality of final gears are arranged alternately along the length direction of the filter screen.

3. The spiral blade variable pitch garbage fine pulverizing device according to claim 1, characterized in that: The pitch adjusting unit comprises a pitch adjusting rack, the pitch adjusting wheel is circular, a gear segment is arranged on the circular outer circumference, the pitch adjusting rack is meshed with the gear segment of the pitch adjusting wheel, and the pitch adjusting rack performs linear reciprocating motion under the rotation of the motor shaft, thereby driving the pitch adjusting wheel to perform reciprocating rotation.

4. The spiral blade variable pitch garbage fine pulverizing device as claimed in claim 3, characterized in that: The distance adjustment unit also includes a distance adjustment cam and a distance adjustment connecting rod; A first swinging groove is arranged in the middle of the pitch-adjusting connecting rod, a second swinging groove is arranged at the first end, and an adjustment hole is arranged at the second end; the pitch-adjusting cam is connected to the motor shaft, the pitch-adjusting cam is a C-shaped structure, and is connected in the middle by a swinging shaft, the swinging shaft passes through the first swinging groove of the pitch-adjusting connecting rod, and the adjustment hole of the pitch-adjusting connecting rod is rotatably connected to the end face of the housing assembly through a pin shaft; the pitch-adjusting rack protrudes out of the connecting shaft and passes through the second swinging groove of the pitch-adjusting connecting rod; The rotation of the motor shaft drives the pitch-adjusting cam to rotate, thereby driving the pitch-adjusting connecting rod to swing, thereby driving the pitch-adjusting rack to perform linear reciprocating motion.

5. The spiral blade variable pitch garbage fine pulverizing device according to claim 1, characterized in that: The housing assembly comprises a first housing and a second housing that are arranged opposite to each other; There is a through hole in the center of the two shells that passes through the motor shaft. An annular groove and multiple strip grooves are arranged on the inward end surface of the shell. The annular groove is used to install the transmission shaft of the intermediate gear, and the strip grooves are arranged radially for installing the transmission shaft of the final gear, wherein the strip groove of the second shell is a through groove.

6. The spiral blade variable pitch garbage fine pulverizing device according to claim 5, characterized in that: A flat notch is provided on the outer periphery of the first shell, and the pitch adjusting unit includes a pitch adjusting wheel arranged in the shell assembly. The pitch adjusting wheel is circular, and a gear segment is arranged on the circular outer periphery. The gear segment leaks out through the flat notch of the first shell.

7. The spiral blade variable pitch garbage fine pulverizing device according to claim 5, characterized in that: An arc-shaped circular groove is arranged on the end surface of the second shell away from the first shell, and the cylindrical filter screen is installed in the arc-shaped circular groove and can rotate in the arc-shaped circular groove.

8. A method for treating garbage using the spiral blade variable pitch garbage fine pulverizing device as claimed in any one of claims 1 to 7, characterized in that: The circumferentially arranged reamers move away from or towards the center while rotating, and gradually squeeze and crush the garbage when moving towards the center.

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