CN111330721A

CN111330721A - Ore crushing device

Info

Publication number: CN111330721A
Application number: CN202010238809.3A
Authority: CN
Inventors: 马兆飞
Original assignee: Guangzhou Liji Mining Equipment Co ltd
Current assignee: Hunan linli Southern New Material Technology Co.,Ltd.
Priority date: 2020-03-30
Filing date: 2020-03-30
Publication date: 2020-06-26
Anticipated expiration: 2040-03-30
Also published as: CN111330721B

Abstract

The invention discloses an ore crushing device, which comprises a left spline shaft and a right spline shaft, wherein in an initial state, the right spline shaft is meshed with a right spline meshing shaft to drive a left crushing wheel and a right crushing wheel to rotate to crush ores preliminarily, then the ores preliminarily crushed fall into a stirring box to be stacked, the mass in the stirring box is gradually increased, a stirring shaft is meshed with the stirring spline shaft, the left spline shaft is meshed with the left spline meshing shaft, a toothed ring gear is meshed with a toothed ring, the stirring box is driven to rotate relative to the stirring shaft, the rotating direction of the stirring shaft is opposite, and the crushing efficiency is accelerated.

Description

Ore crushing device

Technical Field

The invention relates to the technical field of ore crushing, in particular to an ore crushing device.

Background

The traditional ore crushing device generally adopts a roller to rotate to sequentially crush ores, and the crushed ores are uneven in particle size and large in particle diameter difference, so that the device for improving the ore crushing efficiency is needed to be invented.

Disclosure of Invention

The object of the present invention is to provide an ore crushing device for overcoming the above mentioned drawbacks of the prior art.

The ore crushing device comprises a crusher body, wherein an engagement groove is formed in the crusher body, a primary crushing device is arranged in the engagement groove and comprises primary crushed blocks positioned in the engagement groove, a primary crushing space is formed in the primary crushed blocks, a driving shaft which extends forwards and backwards and is bilaterally symmetrical is arranged on the inner wall of the primary crushing space in a rotating connection mode, crushing wheels are arranged on the driving shaft, an ore inlet is formed in the upper inner wall of the primary crushing space in a penetrating mode, an ore outlet is formed in the lower inner wall of the primary crushing space in a penetrating mode and is communicated with a conveying pipe, ores are crushed by the crushing wheels on the left side and the right side in a rotating mode and are discharged from the ore outlet through the conveying pipe, a secondary crushing device is arranged on the lower side of the primary crushed blocks in the crusher body and comprises a stirring box arranged in a cavity, the ore crushing machine is characterized in that a stirring space is arranged in the stirring box, a toothed ring is fixedly arranged on an outer wall ring of the stirring box, a stirring shaft is arranged on the lower wall of the stirring box in a rotating fit mode, ten stirring rods are fixedly connected to the stirring shaft in a staggered mode from top to bottom, ores fall into the stirring space and then are accelerated to crush through opposite rotation of the stirring shaft and the stirring box, a driving device located on the left side of the meshing groove is further arranged in the crushing machine body and comprises a transmission groove located on the left side of the meshing groove, a transmission block is arranged in the transmission groove and is in sliding fit with a wall body in the transmission groove, a transmission motor is fixedly arranged in the transmission block, a spline meshing shaft is symmetrically and dynamically connected to the left end and the right end of the transmission motor, the spline meshing shaft is connected with a spline shaft, power switching is achieved through the left and right movement of the transmission block.

On the basis of the technical scheme, the primary crushing device further comprises a front cavity located at the front side of the primary crushing space, a crushing fixed bevel gear located in the front cavity is arranged on the driving shaft, a crushing transmission shaft is rotatably connected to the inner wall of the lower side of the front cavity, an upper crushing bevel gear meshed with the crushing fixed bevel gear is arranged on the upper side of the crushing transmission shaft, a lower crushing bevel gear located in the meshing groove is arranged on the lower side of the crushing transmission shaft, a primary grinding transmission shaft located on the lower side of the crushing block is rotatably connected to the meshing groove, the left side of the primary grinding transmission shaft is fixedly connected with the spline shaft, and the primary grinding transmission shaft, the lower crushing bevel gear, the crushing transmission shaft, the upper crushing bevel gear and the meshing transmission of the crushing fixed bevel gear are connected through the crushing bevel.

On the basis of the technical scheme, the secondary crushing device also comprises a gear ring meshing groove with an inward opening communicated with the periphery of the cavity, the gear ring is arranged in the gear ring meshing groove, a gear ring gear which can be meshed with the gear ring is also arranged in the gear ring meshing groove, the bottom wall of the lower end of the stirring box is symmetrically and fixedly connected with inverted T-shaped blocks which are in sliding fit in the spring grooves, the spring grooves are symmetrically arranged in the rotating block, the rotating block is rotationally matched in the cavity, a supporting spring is fixedly connected between the bottom wall of the inverted T-shaped block and the bottom wall of the spring groove, the upper wall of the middle of the rotating block is provided with a stirring spline shaft which is in running fit with the inner wall of the rotating block, the upper end of the rotating block is provided with a stirring shaft meshing groove, the stirring shaft meshing groove can be in splined connection with the stirring shaft, and the lower end of the stirring shaft meshing groove is fixedly connected with the upper end of a rotating block transmission shaft.

On the basis of the technical scheme, the driving device further comprises a transmission shaft moving groove positioned at the outer end of the transmission cavity, the outer end of the moving groove is provided with a spline shaft, the spline shaft is in rotating fit with a wall body, the right end of the right-end spline shaft is fixedly connected with a primary grinding transmission shaft, the primary grinding transmission shaft is rotatably connected between the spline shaft and a primary grinding space at the left side, the left end of the transmission cavity is provided with a left belt wheel cavity, the wall body between the spline shaft and the left belt wheel cavity is in rotating fit with a right upper belt wheel shaft, the right end of the upper belt wheel shaft extends to be fixedly connected with the left spline shaft, the left end of the upper belt wheel shaft extends to be fixedly connected with a left driving belt wheel in the left belt wheel cavity, the right end of the left belt wheel cavity is provided with a rotating bevel gear meshing groove, a lower belt wheel shaft is rotatably matched between the left belt wheel cavity and the, the left driven belt wheel is connected with the left driving belt wheel through a left belt, a lower belt wheel cavity is arranged at the upper end of a bevel gear meshing groove, a rotating block transmission shaft is rotatably matched between the lower belt wheel cavity and the bevel gear meshing groove, the upper end of the bevel gear meshing groove is rotatably matched with the top wall of the belt wheel cavity and extends to the rotating block fixed connection, the lower end of the rotating block transmission shaft extends to an inner fixed connection upper bevel gear meshed with the rotating block lower bevel gear, a gear ring meshing groove is arranged above the lower belt wheel cavity, a gear transmission shaft is rotatably matched with the gear ring meshing groove, the lower end of the gear transmission shaft extends to the lower belt wheel cavity and is fixedly connected with a lower driven belt wheel, the lower driven belt wheel is connected with the driving lower belt wheel through a lower belt, and a gear ring gear capable of being meshed with the gear ring is fixedly connected into the gear ring meshing groove at the upper end of the gear transmission shaft, the left end of the cavity is communicated with a block cavity, a block with a lower inclined plane is arranged in the block cavity in a sliding fit mode, an upper inclined plane is arranged on the outer bottom wall of the stirring box and matched with the block cavity, a rack is fixedly connected to the left end of the block cavity, a rack spring is fixedly connected to the left end of the rack and the left wall of the block cavity, a lead screw bevel gear meshing groove is formed in the upper end of the block cavity, a block transmission shaft is rotatably matched between the lead screw bevel gear meshing groove and the wall body of the block cavity and extends to the block cavity, a rack gear meshed with the rack is fixedly connected to the upper end of the block transmission shaft, a lead screw lower bevel gear is fixedly connected to the lead screw bevel gear meshing groove, a transmission block lead screw is rotatably matched between the lead screw bevel gear meshing groove and the wall body of the transmission cavity, and an upper lead screw bevel gear meshed with the lead screw lower bevel, the left end of the transmission block screw rod extends into the transmission cavity and is in threaded connection with the transmission block.

The invention has the beneficial effects that: with preliminary kibbling power and thoroughly crushing power separately to when realizing that the ore quality in the agitator tank reaches certain quality, preliminary kibbling power cuts off, thoroughly smashes power and opens, and it is extravagant to reduce the energy, and agitator tank direction of rotation and (mixing) shaft direction of rotation are opposite simultaneously, improve crushing speed.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is a schematic view of an ore crushing apparatus as a whole;

FIG. 2 is an enlarged view of a portion of the preliminary grinding space 75 of FIG. 1;

fig. 3 is a schematic top view of the junction of 59 and 61 of fig. 2.

Detailed Description

The invention will now be described in detail with reference to fig. 1-3, for the sake of convenience, the orientations described hereinafter being defined as follows: the up, down, left, right, and front-back directions described below correspond to the up, down, left, right, and front-back directions in the projection relationship of fig. 1 itself.

Referring to fig. 1 to 3, a mineral crushing apparatus according to an embodiment of the present invention includes a crusher body 20, an engagement groove 62 is formed in the crusher body 20, a preliminary crushing apparatus is formed in the engagement groove 62, the preliminary crushing apparatus includes a preliminary crushed mineral 56 located in the engagement groove 62, a preliminary crushing space 75 is formed in the preliminary crushed mineral 56, a driving shaft 59 rotatably connected to the inner wall of the preliminary crushing space 75 and extending forward and backward and symmetrically left and right is provided on the driving shaft 59, a crushing wheel 57 is provided on the driving shaft 59, a mineral inlet 55 is provided on the upper inner wall of the preliminary crushing space 75, a mineral outlet 66 is provided on the lower inner wall of the preliminary crushing space 75, the mineral outlet 66 is communicated with a delivery pipe 65, mineral is rotated and crushed by the crushing wheels 57 on the left and right sides and is discharged from the mineral outlet 66 through the delivery pipe 65, the secondary crushing device is arranged in the crusher body 20 and located on the lower side of the primary grinding fragment 56, the secondary crushing device comprises a stirring box 26 arranged in a cavity 27, a stirring space 18 is arranged in the stirring box 26, a toothed ring 22 is fixedly arranged on the outer wall ring of the stirring box 26, a stirring shaft 19 is matched with the lower wall of the stirring box 26 in a rotating manner, ten stirring rods 21 which are distributed from top to bottom in a staggered manner are fixedly connected to the stirring shaft 19, the crushing efficiency is accelerated through the opposite rotation of the stirring shaft 19 and the stirring box 26 after ores fall into the stirring space 18, a driving device located on the left side of the meshing groove 62 is further arranged in the crusher body 20 and comprises a transmission groove 6 located on the left side of the meshing groove 62, a transmission block 7 is arranged in the transmission groove 6, the transmission block 7 is matched with the inner wall body of the transmission groove 6 in a sliding manner, and a, the left end and the right end of the transmission motor 8 are symmetrically and dynamically connected with spline meshing shafts 11, spline shafts 13 are connected to the outer ends of the spline meshing shafts 11 through splines, and the transmission block 7 moves left and right to achieve power switching to respectively and independently drive the primary crushing device and the secondary crushing device to thoroughly crush ores.

In addition, in one embodiment, the preliminary grinding apparatus further includes a front chamber 81 located at a front side of the preliminary grinding space 75, a grinding fixed bevel gear 58 positioned in the front cavity 81 is arranged on the driving shaft 59, a grinding transmission shaft 61 is rotatably connected with the inner wall of the lower side of the front cavity 81, the grinding transmission shaft 61 is provided at the upper side thereof with a grinding upper bevel gear 60 engaged with the grinding fixed bevel gear 58, the crushing transmission shaft 61 is provided at the lower side thereof with a crushing lower bevel gear 64 positioned in the engaging groove 62, a primary grinding transmission shaft 17 positioned on the lower side of the grinding block 56 is rotationally connected in the engaging groove 62, the left side of the primary grinding transmission shaft 17 is fixedly connected with the spline shaft 13, the grinding bevel gear 63, the grinding lower bevel gear 64, the grinding transmission shaft 61, the grinding upper bevel gear 60 and the grinding fixed bevel gear 58 are engaged to drive the grinding bevel gear 57 to rotate relatively.

In addition, in one embodiment, the secondary crushing device further comprises a gear ring engaging groove 23 with an opening inwardly communicated with the periphery of the cavity 27, the gear ring 22 is arranged in the gear ring engaging groove 23, a gear ring gear 24 capable of being engaged with the gear ring 22 is further arranged in the gear ring engaging groove 23, the bottom wall of the lower end of the stirring box 26 is symmetrically and fixedly connected with an inverted T-shaped block 28, the inverted T-shaped block 28 is in sliding fit in a spring groove 30, the spring groove 30 is symmetrically arranged in a rotating block 40, the rotating block 40 is in rotating fit in the cavity 27, a supporting spring 29 is fixedly connected between the bottom wall of the inverted T-shaped block 28 and the bottom wall of the spring groove 30, a stirring spline shaft 80 is arranged on the middle upper wall of the rotating block 40, the stirring spline shaft 80 is in rotating fit with the inner wall of the rotating block 40, and an engaging groove 34 is arranged at the upper end of the rotating block 40, the stirring shaft meshing groove 34 can be in splined connection with the stirring shaft 19, and the lower end of the stirring shaft meshing groove 34 is fixedly connected with the upper end of a rotating block transmission shaft 36.

In addition, in one embodiment, the driving device further includes a transmission shaft moving groove 9 located at the outer end of the transmission cavity 6, the outer end of the moving groove 9 is provided with a spline shaft 13, the spline shaft 13 is rotatably engaged with the wall body, the right end of the right spline shaft 13 is fixedly connected with a primary grinding transmission shaft 17, the spline shaft 13 is rotatably connected with the primary grinding transmission shaft 17 between the left primary grinding space 75, the left end of the transmission cavity 6 is provided with a left pulley cavity 52, the wall body between the spline shaft 13 and the left pulley cavity 52 is rotatably engaged with a right upper pulley shaft 1, the right end of the upper pulley shaft 1 is extended to be fixedly connected with the left spline shaft 13, the left end of the upper pulley shaft 1 is extended to be fixedly connected with a left driving pulley 54 in the left pulley cavity 52, the right end of the left pulley cavity 52 is provided with a rotating bevel gear engaging groove 35, a lower pulley shaft 48 is rotatably engaged between the left pulley cavity, a left driven pulley 50 is fixedly connected with the left end of the lower pulley shaft 48 extending into the left pulley cavity 52, the left driven pulley 50 is connected with the left driving pulley 54 by a left belt 51, a lower pulley cavity 31 is arranged at the upper end of the bevel gear meshing groove 35, a rotating block transmission shaft 36 is rotatably matched between the lower pulley cavity 31 and the bevel gear meshing groove 35, the rotating block transmission shaft 36 is rotatably matched with the top wall of the pulley cavity 31, the upper end of the rotating block transmission shaft extends to the rotating block 40 and is fixedly connected with the rotating block, the lower end of the rotating block transmission shaft 36 extends into the rotating block 35 and is fixedly connected with an upper bevel gear 37 meshed with the rotating block lower bevel gear 38, a gear ring meshing groove 23 is arranged above the lower pulley cavity 31, a gear transmission shaft 25 is rotatably matched with the gear ring meshing groove 23, a lower driven pulley 32 is fixedly connected with the lower driven pulley 25 by the lower belt 33, and the lower driven pulley 32 is connected with the driving lower pulley 39 by a lower belt, the upper end of the gear transmission shaft 25 extends into the gear ring meshing groove 23 and is fixedly connected with a ring gear 24 which can be meshed with the gear ring 22 for transmission, the left end of the cavity 27 is communicated with a block cavity 47, a block 43 which is provided with a lower inclined surface 41 is matched in the block cavity 47 in a sliding way, the outer bottom wall of the stirring box 26 is provided with an upper inclined surface 42 matched with the block 43, the left end of the block 43 is fixedly connected with a rack 45, the left end of the rack 45 and the left wall of the block cavity 47 are fixedly connected with a rack spring 46, the upper end of the block cavity 47 is provided with a lead screw bevel gear meshing groove 14, a block transmission shaft 53 is matched between the lead screw bevel gear meshing groove 14 and the wall body of the block cavity 47 in a rotating way, the block transmission shaft 53 extends to the block cavity 47 and is fixedly connected with a rack gear 44 which is meshed with the rack 45, and the upper end of the block transmission, a transmission block screw rod 10 is rotatably matched with a wall body between the screw rod bevel gear meshing groove 14 and the transmission cavity 6, the right end of the transmission block screw rod 10 extends to the screw rod bevel gear meshing groove 14 and is fixedly connected with a screw rod upper bevel gear 15 meshed with the screw rod lower bevel gear 16, and the left end of the transmission block screw rod 10 extends into the transmission cavity 6 and is in threaded connection with the transmission block 7.

In the initial state, the upper end of the inverted T-shaped block 28 is abutted against the stirring box 26 and is positioned at the upper end of the cavity 27, the supporting spring 29 is in a relaxed state, the gear ring 22 is not meshed with the gear ring 24, the stirring shaft meshing groove 34 is not meshed with the stirring shaft 19, the spline meshing shaft 11 is meshed with the right spline groove 12, and the building block 43 extends out of the left end of the building block groove 47 under the action of the rack spring 46 and is positioned in the cavity 27.

When ore is needed to be crushed, the electric motor 8 is started, at this time, the ore is poured into the preliminary crushing chamber 75 from the ore inlet 55, at this time, the driving motor 8 drives the spline engaging shaft 11 to rotate, thereby driving the preliminary crushing transmission shaft 17 to rotate through the second spline shaft 13, driving the crushing fixed bevel gear 58 to rotate through the power transmission of the crushing bevel gear 63, the crushing upper bevel gear 64, the crushing transmission shaft 61 and the crushing upper bevel gear 60, thereby driving the left and right crushing wheels 57 to rotate for preliminary crushing the ore, the ore is preliminarily crushed and falls into the stirring box 26 through the ore outlet 66 and the delivery pipe 65, as the preliminarily crushed ore of the stirring box 26 is accumulated, the mass in the stirring box 26 becomes heavier, the supporting spring 29 is continuously pressed to descend, when the stirring box 26 descends to abut against the fixed block 40, the stirring shaft 19 engages with the stirring shaft engaging groove 34, the toothed ring 22 engages with the first gear teeth 24, meanwhile, the contact of the upper inclined surface 42 and the lower inclined surface 41 moves the building block 43 leftwards, the movement of the building block 43 leftwards drives the rack 45 to move leftwards, the rack gear 44 rotates to drive the building block transmission shaft 53 to rotate, power passes through the lead screw upper bevel gear 15, the lead screw lower bevel gear 16 transmits power to drive the transmission block lead screw 10 to rotate and drive the transmission block 7 to move leftwards, at the moment, the right spline meshing shaft 11 is separated from the right spline groove 12, the left spline meshing shaft 11 is meshed with the left spline groove 12 to rotate the left spline shaft 13, the left spline shaft 13 rotates to drive the first transmission shaft 1 to rotate, the power transmission of the rotating block upper bevel gear 37 drives the rotating block transmission shaft 36 to rotate, at the moment, the rotating block transmission shaft 36 drives the stirring spline shaft 80 to rotate and drives the stirring shaft 19 to rotate, meanwhile, the driving lower belt wheel 39 on the sixth transmission shaft 36 transmits power through the lower belt 33, the lower driven belt wheel 32 and the gear transmission shaft 25 to drive the gear ring gear 24 to rotate, so that the gear ring gear 24 drives the gear ring 22 to rotate to drive the stirring box 26 to rotate, the rotation directions of the stirring shaft 19 and the stirring box 26 are opposite, the crushing efficiency is improved, and after the crushing is completed, the front end cavity door is opened to take out the ore powder from the stirring box 26, and the initial state is recovered.

The invention has the advantages that the primary crushing power and the thorough crushing power are separated, so that when the ore quality in the stirring box reaches a certain quality, the primary crushing power is cut off, the thorough crushing power is started, the energy waste is reduced, and meanwhile, the rotation direction of the stirring box is opposite to that of the stirring shaft, so that the crushing speed is improved.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. An ore crushing device comprises a crusher body, wherein a meshing groove is formed in the crusher body, a primary crushing device is arranged in the meshing groove and comprises a primary crushing block positioned in the meshing groove, a primary crushing space is arranged in the primary crushing block, a driving shaft which is rotationally connected, extends forwards and backwards and is symmetrical in left and right is arranged on the inner wall of the primary crushing space, a crushing wheel is arranged on the driving shaft, an ore inlet is formed in the upper inner wall of the primary crushing space in a penetrating mode, an ore outlet is formed in the lower inner wall of the primary crushing space in a penetrating mode and communicated with a conveying pipe, ores pass through the left side and the right side and are rotationally crushed by the crushing wheel, the ore outlet is communicated with the conveying pipe to be discharged, a secondary crushing device positioned on the lower side of the primary crushing block is arranged in the crusher body, and the secondary crushing device comprises, the ore crushing machine is characterized in that a stirring space is arranged in the stirring box, a toothed ring is fixedly arranged on an outer wall ring of the stirring box, a stirring shaft is arranged on the lower wall of the stirring box in a rotating fit mode, ten stirring rods are fixedly connected to the stirring shaft in a staggered mode from top to bottom, ores fall into the stirring space and then are accelerated to crush through opposite rotation of the stirring shaft and the stirring box, a driving device located on the left side of the meshing groove is further arranged in the crushing machine body and comprises a transmission groove located on the left side of the meshing groove, a transmission block is arranged in the transmission groove and is in sliding fit with a wall body in the transmission groove, a transmission motor is fixedly arranged in the transmission block, a spline meshing shaft is symmetrically and dynamically connected to the left end and the right end of the transmission motor, the spline meshing shaft is connected with a spline shaft, power switching is achieved through the left and right movement of the transmission block.

2. A mineral breaker apparatus in accordance with claim 1 wherein: preliminary reducing mechanism still including being located the ante-chamber of preliminary crushing space front side, be equipped with in the drive shaft and be located the fixed bevel gear that pulverizes of ante-chamber intracavity, ante-chamber downside inner wall rotates and is connected with and pulverizes the transmission shaft, pulverize the transmission shaft upside be equipped with pulverize fixed bevel gear meshing connection's last bevel gear, it is equipped with to pulverize transmission shaft downside and is located under the meshing inslot pulverize bevel gear, meshing inslot internal rotation is connected with and is located pulverize the transmission shaft of just grinding of piece downside, just grind transmission shaft left side with fixed connection between the integral key shaft, through pulverize bevel gear, pulverize down bevel gear, pulverize the transmission shaft, pulverize last bevel gear, pulverize fixed bevel gear's.

3. A mineral breaker apparatus in accordance with claim 2 wherein: the secondary crushing device also comprises a gear ring meshing groove with an inward opening communicated with the periphery of the cavity, the gear ring is arranged in the gear ring meshing groove, a gear ring gear which can be meshed with the gear ring is also arranged in the gear ring meshing groove, the bottom wall of the lower end of the stirring box is symmetrically and fixedly connected with inverted T-shaped blocks which are in sliding fit in the spring grooves, the spring grooves are symmetrically arranged in the rotating block, the rotating block is rotationally matched in the cavity, a supporting spring is fixedly connected between the bottom wall of the inverted T-shaped block and the bottom wall of the spring groove, the upper wall of the middle of the rotating block is provided with a stirring spline shaft which is in running fit with the inner wall of the rotating block, the upper end of the rotating block is provided with a stirring shaft meshing groove, the stirring shaft meshing groove can be in splined connection with the stirring shaft, and the lower end of the stirring shaft meshing groove is fixedly connected with the upper end of a rotating block transmission shaft.

4. The ore crushing device according to claim 3, wherein the driving device further comprises a transmission shaft moving groove located at the outer end of the transmission cavity, the outer end of the moving groove is provided with a spline shaft, the spline shaft is in rotating fit with the wall body, the right end of the right spline shaft is fixedly connected with a primary grinding transmission shaft, the spline shaft is rotatably connected with the primary grinding transmission shaft between the primary grinding space at the left side, the left end of the transmission cavity is provided with a left pulley cavity, the wall body between the spline shaft and the left pulley cavity is in rotating fit with a right upper pulley shaft, the right end of the upper pulley shaft extends to be fixedly connected with the left spline shaft, the left end of the upper pulley shaft extends to be fixedly connected with a left driving pulley in the left pulley cavity, the right end of the left pulley cavity is provided with a rotating bevel gear engaging groove, and a lower pulley shaft is rotatably fitted between the left pulley cavity and, the left end of the lower belt wheel shaft extends to a left driven belt wheel fixedly connected in a left belt wheel cavity, the left driven belt wheel is connected with the left driving belt wheel through a left belt, a lower belt wheel cavity is arranged at the upper end of a bevel gear meshing groove, a rotating block transmission shaft is arranged between the lower belt wheel cavity and the bevel gear meshing groove in a rotating fit manner, the upper end of the rotating block transmission shaft in a rotating fit manner extends to the rotating block fixed connection, the lower end of the rotating block transmission shaft extends to an upper bevel gear fixedly connected with the rotating block and meshed with the lower bevel gear of the rotating block, a gear ring meshing groove is arranged above the lower belt wheel cavity, a gear transmission shaft is arranged in a rotating fit manner in the gear ring meshing groove, the lower end of the gear transmission shaft extends to a lower driven belt wheel fixedly connected in the lower belt wheel cavity, the lower driven belt wheel is connected with the driving lower belt wheel through a lower belt, and the upper end of the gear transmission shaft extends to the gear ring meshing groove The cavity left end is communicated with a block cavity, a block with a lower inclined plane is arranged in the block cavity in a sliding fit mode, an upper inclined plane is arranged on the outer bottom wall of the stirring box and matched with the outer bottom wall of the stirring box, a rack is fixedly connected with the block left end, a rack spring is fixedly connected with the rack left end and the block cavity left wall, a lead screw bevel gear meshing groove is formed in the upper end of the block cavity, a block transmission shaft is arranged between the lead screw bevel gear meshing groove and the block cavity wall in a rotating fit mode and extends to the block cavity fixedly connected with a rack gear meshed with the rack, the upper end of the block transmission shaft extends to a lead screw bevel gear fixedly connected with a lead screw lower bevel gear, a transmission block lead screw is arranged between the lead screw bevel gear meshing groove and the transmission cavity in a rotating fit mode, and the right end of the transmission block lead screw extends to the lead screw bevel gear meshing groove fixedly connected with And the left end of the screw rod of the transmission block extends into the transmission cavity and is in threaded connection with the transmission block.