CN216362617U

CN216362617U - Underwater sewage cutting and crushing machine for hydraulic and hydroelectric engineering

Info

Publication number: CN216362617U
Application number: CN202120273951.1U
Authority: CN
Inventors: 赵西伟; 熊伟; 罗碧萍
Original assignee: Hunan Taoyuan Hydropower Engineering Construction Co ltd
Current assignee: Hunan Taoyuan Hydropower Engineering Construction Co ltd
Priority date: 2021-01-29
Filing date: 2021-01-29
Publication date: 2022-04-26
Anticipated expiration: 2031-01-29

Abstract

The utility model relates to an filth cutting rubbing crusher under water for hydraulic and hydroelectric engineering, it relates to hydraulic and hydroelectric engineering technical field, including smashing case, drive assembly, cutting assembly, smash case width direction to the lateral wall link up, smash the incasement and be equipped with the filter screen, filter screen fixed connection smashes one side of incasement width direction, smash a plurality of shovel boards of one side fixedly connected with of filter screen far away from the bottom plate of the case, cutting assembly wears to locate to smash the incasement by smashing case length direction lateral wall, cutting assembly rotates with crushing case lateral wall to be connected, cutting assembly is used for stirring garrully to get into the pasture and water of smashing the incasement, drive assembly locates to smash one side that the bottom plate of the case is close to the filter screen, the bottom of smashing case length direction both sides is rotated and is connected with the runner, drive assembly is used for the drive to smash the case and removes. This application has the effect of the less equipment resource of waste and manpower resources when filth cutting rubbing crusher cuts the operation to pasture and water under water.

Description

Underwater sewage cutting and crushing machine for hydraulic and hydroelectric engineering

Technical Field

The application relates to the technical field of hydraulic and hydroelectric engineering, in particular to an underwater sewage cutting crusher for hydraulic and hydroelectric engineering.

Background

Water is a basic element that human beings rely on for survival, electric power is a main energy source for social development, water conservancy and hydropower engineering is a project built for eliminating water damage and developing and utilizing water resources, however, water plants overflowing in water often have adverse effects on the related projects of water conservancy and hydropower, and therefore an underwater pollutant cutting and smashing machine is needed to treat the water plants.

The prior patent publication No. CN208663882U and the patent name thereof is a patent of an underwater sewage cutting pulverizer for hydraulic and hydroelectric engineering, which comprises a pulverizing box, a motor, a shovel tooth and a leakage net, wherein the upper end of the pulverizing box is provided with a motor plate, the two sides of the motor plate are both provided with the motor, the front side of the lower end of the pulverizing box is provided with the shovel tooth, the rear side of the inner part of the pulverizing box is provided with the leakage net, the lower end of the inner part of the pulverizing box is provided with a cutting knife, the lower end of the motor is provided with a rotating shaft which penetrates through the motor plate and is arranged in the pulverizing box, the pulverizing box is firstly arranged at the rear side of a ship through a screw hole and then driven to advance by starting the ship, aquatic plants can be combed through the shovel tooth, the cut aquatic plants after combing through the cutting knife in the advancing process, then the rotating shaft is driven to rotate by starting the motor, the rotating shaft drives a turntable to rotate so as to drive the pulverizing blades to rotate and pulverize, but the pulverizer needs to advance under the driving of the ship, the motor is restarted to cut the pasture and water in the advancing process, and the cutting operation process of the pasture and water is troublesome.

In view of the above-mentioned related technologies, the inventor thinks that there is a defect that many equipment resources and human resources are needed to be consumed when the underwater pollutant cutting crusher cuts waterweeds.

SUMMERY OF THE UTILITY MODEL

In order to improve the defect that more equipment resources and manpower resources need to be consumed when cutting the operation to pasture and water by the underwater pollutant cutting pulverizer, the application provides an underwater pollutant cutting pulverizer for hydraulic and hydroelectric engineering.

The application provides a pair of an underwater pollutant cutting rubbing crusher for hydraulic and hydroelectric engineering adopts following technical scheme:

the utility model provides an underwater pollutant cutting rubbing crusher for hydraulic and hydroelectric engineering, is including smashing case, drive assembly, cutting assembly, smash case width direction to the lateral wall link up, smash the incasement and be equipped with the filter screen, filter screen fixed connection smashes one side of incasement width direction, smash a plurality of shovel boards of one side fixedly connected with of bottom of the case board faraway from the filter screen, cutting assembly wears to locate crushing incasement by smashing case length direction lateral wall, cutting assembly rotates with crushing case lateral wall to be connected, cutting assembly is used for stirring garrulous entering and smashes the aquatic weed of incasement, drive assembly locates the one side that crushing bottom of the case board is close to the filter screen, the bottom rotation of smashing case length direction both sides is connected with the runner, drive assembly is used for the drive to smash the case removal.

Through adopting above-mentioned technical scheme, it is submarine to arrange the cutting rubbing crusher in, the cutting rubbing crusher can remove at the bottom under drive assembly's drive effect, it rolls at the bottom to remove in-process runner, it removes in-process shovel board and carries out first step cutting to pasture and water to smash the incasement to smash, the rethread starts cutting assembly and carries out second step cutting to the pasture and water that cuts into and smashes the incasement and handle, the pasture and water after handling will be at the in-process that smashes the case and continue to advance and remove towards the filter screen, through drive assembly's setting, the cutting rubbing crusher need not use boats and ships to pull when cutting the operation to pasture and water, consequently, equipment resource and manpower resources can be saved.

Optionally, the cutting assembly is arranged in the crushing box in a penetrating mode along the width direction of the crushing box through the side wall of one side of the length direction of the crushing box, one end, located outside the crushing box, of the cutting assembly is in transmission connection with the transmission assembly, and the other end, far away from the cutting assembly, of the transmission assembly is in transmission connection with the driving assembly.

Through adopting above-mentioned technical scheme, when operating personnel started cutting assembly and cut pasture and water, transmission assembly can be with cutting assembly's power transmission to drive assembly, and drive assembly passes through the power drive crushing case removal of transmission assembly transmission, and cutting assembly can move with drive assembly in step, therefore rubbing crusher can remove by oneself when carrying out pasture and water cutting operation, is favorable to saving equipment resource and manpower resources.

Optionally, drive assembly includes drive case, drive shaft, drive fan, the drive case is located and is smashed the one side that the bottom plate of the case is close to the filter screen, drive case fixed connection is in smashing bottom plate width direction's intermediate position department, the drive shaft is worn to locate the drive case perpendicularly by the drive case and is kept away from the lateral wall of filter screen one side, the drive shaft is located the one pot head of drive incasement and establishes and the first transmission wheel of fixedly connected with, drive pot head is established and fixed connection is located the outer one end of drive case in the drive shaft, the one end that cutting assembly was kept away from to transmission assembly is worn to locate in the drive case, transmission assembly is located the one end and the first transmission wheel transmission of drive incasement and is connected.

Through adopting above-mentioned technical scheme, when operating personnel started cutting assembly, transmission assembly will cut assembly moving power transmission to first drive wheel and drive first drive wheel and rotate, and first drive wheel will drive the drive shaft and drive the fan rotation, and the drive fan will produce thrust to the rubbing crusher at aquatic pivoted in-process, consequently can drive the rubbing crusher and remove in the aquatic, and the drive case can play the guard action to drive shaft and first drive wheel.

Optionally, the cutting assembly includes motor, axis of rotation, blade, the axis of rotation is worn to locate perpendicularly crushing incasement by the lateral wall of crushing case length direction one side, just the axis of rotation is worn to locate perpendicularly on the inside wall of crushing case length direction opposite side, the axis of rotation is rotated with the lateral wall of crushing case length direction both sides and is connected, the axis of rotation is located the outer one end of crushing case to the motor, the motor output shaft is connected with rotation axis transmission, drive assembly locates between crushing case lateral wall and the motor, just drive assembly is connected with rotation axis transmission, the blade is equipped with a plurality of, and is a plurality of blade cover is established and fixed connection is located the part of crushing incasement in the axis of rotation.

Through adopting above-mentioned technical scheme, operating personnel starter motor, motor output shaft drive axis of rotation and blade rotation, and the blade can cut the pasture and water of smashing the incasement at smashing the incasement rotation, axis of rotation pivoted in-process, and drive assembly drives first drive wheel with axis of rotation pivoted power transmission to first drive wheel and rotate, therefore operating personnel only need starter motor can drive the blade and rotate the cutting to the pasture and water, can also drive the drive fan and rotate the crushing case of drive and remove.

Optionally, the transmission assembly includes second drive wheel, third drive wheel, fourth drive wheel, drive belt, transmission shaft, the second drive wheel cover is established and fixed connection is located the outer one end of crushing case in the axis of rotation, just the second drive wheel is located between motor and the crushing case lateral wall, the transmission shaft is worn to locate the drive incasement perpendicularly by the lateral wall that drive case width direction is close to motor one side, the transmission shaft rotates with the drive case to be connected, third drive wheel cover is established and fixed connection is in the one end that the drive case was kept away from to the transmission shaft, the drive belt cover is located on first drive wheel and the second drive wheel lateral wall, fourth drive wheel cover is established and fixed connection is located the one end of drive incasement in the transmission shaft, the fourth drive wheel is connected with first drive wheel transmission.

By adopting the technical scheme, an operator starts the motor to drive the rotating shaft to rotate, the rotating shaft drives the second driving wheel to rotate, the second driving wheel drives the driving belt to rotate with the third driving wheel, the third driving wheel drives the transmission shaft to rotate with the fourth driving wheel, the fourth driving wheel drives the first driving wheel to rotate, and the first driving wheel drives the driving shaft to rotate with the driving fan, so that the crushing box is driven to move.

Optionally, the second driving wheel and the third driving wheel are both chain wheels, the transmission belt is a chain, the second driving wheel and the third driving wheel are both meshed with the transmission belt, the first driving wheel and the fourth driving wheel are both bevel gears, and the first driving wheel is meshed with the fourth driving wheel.

By adopting the technical scheme, the transmission mode among the second transmission wheel, the third transmission wheel and the transmission belt is chain transmission, compared with a belt transmission mode, the chain transmission does not have the phenomena of elastic sliding and slipping, the transmission efficiency is higher, the buoyancy force received in water is smaller than that received by the belt transmission, the first transmission wheel and the fourth transmission wheel are in gear transmission, and the gear transmission has the advantages of high transmission efficiency and high precision.

Optionally, the crushing case bottom plate is close to the lateral wall fixedly connected with fixed block of transmission shaft one side, the fixed block is kept away from the pot head of crushing case and is established and transmission connection on the transmission shaft.

Through adopting above-mentioned technical scheme, fixed block one end is fixed in on the crushing case bottom plate, and other pot head is established and the transmission is connected on the transmission shaft, therefore the fixed block can play the supporting role to the transmission shaft, promotes the stability of transmission shaft rotation in-process.

Optionally, the outer side wall fixedly connected with that the crushing box is close to one side of the motor is used for protecting a protective cover of the second driving wheel, the third driving wheel and the driving belt, one end of the protective cover close to the rotating shaft is sleeved on the rotating shaft, one end of the protective cover close to the driving shaft is sleeved on the driving shaft, and the rotating shaft and the driving shaft are both rotatably connected with the protective cover.

Through adopting above-mentioned technical scheme, the protection casing can play the guard action to second drive wheel, third drive wheel, drive belt, reduces the possibility that drive assembly is disturbed by debris such as aquatic pasture and water when carrying out power transmission.

In summary, the present application includes at least one of the following beneficial technical effects:

1. arrange the cutting rubbing crusher in the bottom, the cutting rubbing crusher can remove at the bottom under drive assembly's drive effect, remove in-process runner and roll at the bottom, smash the case and remove in-process shovel board and carry out first step cutting to pasture and water, the rethread starts cutting assembly and carries out second step cutting to the pasture and water of cutting into crushing incasement and handle, through drive assembly's setting, the cutting rubbing crusher need not use boats and ships to pull when cutting the operation to pasture and water, consequently, can save equipment resource and manpower resources.

2. When the cutting assembly is started by an operator, the transmission assembly transmits the power of the cutting assembly to the first transmission wheel and drives the first transmission wheel to rotate, the first transmission wheel drives the driving shaft and the driving fan to rotate, and the driving fan generates thrust to the pulverizer in the process of rotating in water, so that the pulverizer can be driven to move in the water.

3. The transmission mode among the second transmission wheel, the third transmission wheel and the transmission belt is chain transmission, compared with a belt transmission mode, the chain transmission does not have the phenomena of elastic sliding and slipping, the transmission efficiency is higher, the buoyancy force received in water is smaller than that received by the belt transmission, the first transmission wheel and the fourth transmission wheel are in gear transmission, and the gear transmission has the advantages of high transmission efficiency and high precision.

Drawings

FIG. 1 is a first schematic structural diagram of an underwater pollutant cutting and crushing machine in the embodiment of the application.

FIG. 2 is a schematic structural diagram II of the underwater pollutant cutting and crushing machine in the embodiment of the application.

FIG. 3 is a partially exploded schematic view of the underwater soil cutting shredder shown in FIG. 1 according to the embodiment of the present application.

Description of reference numerals: 1. a crushing box; 2. a drive assembly; 3. a cutting assembly; 4. a filter screen; 5. a shovel plate; 6. a rotating wheel; 7. a transmission assembly; 21. a drive box; 22. a drive shaft; 23. driving the fan; 24. a first drive pulley; 31. a motor; 32. a rotating shaft; 33. a blade; 71. a second transmission wheel; 72. a third transmission wheel; 73. a fourth transmission wheel; 74. a transmission belt; 75. a drive shaft; 76. a fixed block; 77. a shield.

Detailed Description

The present application is described in further detail below with reference to figures 1-3.

The embodiment of the application discloses an underwater pollutant cutting crusher for hydraulic and hydroelectric engineering. Referring to fig. 1, the underwater sewage cutting crusher for hydraulic and hydroelectric engineering comprises a crushing box 1, wherein opposite side walls in the width direction of the crushing box 1 are through, the manufacturing material of the crushing box 1 is preferably stainless steel, four corners of the bottom surface of the crushing box 1 are respectively and rotatably connected with rotating wheels 6, rotating rollers are rotatably connected between the rotating wheels 6 on two sides in the length direction of the crushing box 1, a plurality of shovel plates 5 are equidistantly arranged on one side in the width direction of a bottom plate of the crushing box 1, five shovel plates 5 are arranged in the embodiment, the cross sections of the shovel plates 5 are right-angled triangles, short sides in the right-angled sides of the shovel plates 5 are attached and welded on the side walls of the bottom plate of the crushing box 1, a driving component 2 for driving the crusher to move is welded on one side of the bottom plate of the crushing box 1 away from the shovel plates 5, a cutting component 3 is arranged in the crushing box 1 in a penetrating manner, the cutting component 3 comprises a rotating shaft 32, the rotating shaft 32 is vertically arranged on the opposite side walls in the length direction of the crushing box 1 in the length direction, the rotation axis 32 is connected with crushing case 1 length direction to the lateral wall rotation, and the one end that the rotation axis 32 is located outside crushing case 1 is equipped with motor 31, and the motor 31 output shaft is connected with rotation axis 32 transmission, and the part cover that the rotation axis 32 is located crushing case 1 is established and fixedly connected with a plurality of blades 33, and one side fixedly connected with filter screen 4 of keeping away from shovel board 5 in crushing case 1.

Referring to fig. 2 and 3, a transmission assembly 7 is rotatably connected to an end of the rotating shaft 32 located outside the pulverizing box 1, the transmission assembly 7 includes a second transmission wheel 71, the second transmission wheel 71 is a sprocket, the second transmission wheel 71 is sleeved and fixedly connected to the rotating shaft 32, the second transmission wheel 71 is located between the pulverizing box 1 and the motor 31, a transmission belt 74 is sleeved on the second transmission wheel 71, the transmission belt 74 is a chain, the second transmission wheel 71 is engaged with the transmission belt 74, a third transmission wheel 72 is penetrated through an end of the transmission belt 74 far away from the second transmission wheel 71, the third transmission wheel 72 is also a sprocket, the third transmission wheel 72 is engaged with the transmission belt 74, a transmission shaft 75 is vertically and fixedly connected to an end of the third transmission wheel 72 far away from the motor 31, and an end of the transmission shaft 75 far away from the third transmission wheel 72 is penetrated through the driving assembly 2.

One side that crushing case 1 bottom plate is close to drive assembly 2 is equipped with fixed block 76, fixed block 76 is the rectangular block, the lateral wall laminating of fixed block 76 width direction one side is welded on crushing case 1 bottom plate, the pot head that crushing case 1 was kept away from to fixed block 76 is established and is rotated and connect on transmission shaft 75, fixed block 76 plays the supporting role to transmission shaft 75, the pot head that transmission shaft 75 is located drive assembly 2 is established and fixedly connected with fourth drive wheel 73, fourth drive wheel 73 is bevel gear, one side welding that crushing case 1 is close to motor 31 has protection casing 77, second drive wheel 71 is located to protection casing 77 cover, third drive wheel 72, outside the drive belt 74, protection casing 77 length direction pot head is located on the axis of rotation 32 and is connected with the axis of rotation 32 rotation, one side cover that protection casing 77 keeps away from axis of rotation 32 is located on transmission shaft 75 and is connected with transmission shaft 75 rotation.

Drive assembly 2 includes drive box 21, the lateral wall laminating and the fixed connection of drive box 21 length direction one side are in the one side of smashing 1 bottom plate and keeping away from shovel 5 of case, be cavity in the drive box 21, the intermediate position department that drive box 21 kept away from crushing 1 one side lateral wall wears to establish perpendicularly and rotates and is connected with drive shaft 22, drive shaft 22 is located the pot head of drive box 21 and establishes and the first drive wheel 24 of fixedly connected with, drive shaft 22 is located the outer pot head of drive box 21 and establishes and fixedly connected with drive fan 23, first drive wheel 24 is for the bevel gear with fourth drive wheel 73 matched with, first drive wheel 24 and fourth drive wheel 73 mesh.

The implementation principle of the underwater pollutant cutting pulverizer for the hydraulic and hydroelectric engineering in the embodiment of the application is as follows:

the cutting and crushing machine is placed under water, an operator starts the motor 31, an output shaft of the motor 31 drives the rotating shaft 32 and the blades 33 to rotate, simultaneously, the rotating shaft 32 drives the second driving wheel 71 to rotate, the second driving wheel 71 drives the driving belt 74 and the third driving wheel 72 to rotate in the rotating process, the third driving wheel 72 drives the driving shaft 75 and the fourth driving wheel 73 to rotate in the driving box 21, the fourth driving wheel 73 drives the first driving wheel 24 and the driving shaft 22 to rotate in the rotating process, the driving shaft 22 drives the driving fan 23 to rotate outside the driving box 21, the driving fan 23 generates thrust to the crushing box 1 in the rotating process in water, the crushing box 1 moves under the thrust through the rotating wheel 6 under the water bottom, the shoveling plate 5 performs first-step cutting treatment on aquatic weeds in the moving process of the crushing box 1, the crushing box 1 continues to move so that the aquatic weeds enter the crushing box 1, and the blades 33 rotating in the crushing box 1 perform second-step cutting treatment on the aquatic weeds, the small aquatic weeds after the cutting treatment can pass through the filter screen 4, and the aquatic weeds which are not completely cut can be blocked by the filter screen 4 and stay in the crushing box 1.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides an under water filth cutting rubbing crusher for hydraulic and hydroelectric engineering which characterized in that: comprises a crushing box (1), a driving component (2) and a cutting component (3), the width direction of the crushing box (1) is communicated with the side wall, a filter screen (4) is arranged in the crushing box (1), the filter screen (4) is fixedly connected with one side of the width direction in the crushing box (1), one side of the bottom plate of the crushing box (1) far away from the filter screen (4) is fixedly connected with a plurality of shovel plates (5), the cutting component (3) is penetrated and arranged in the crushing box (1) by the side wall of the length direction of the crushing box (1), the cutting component (3) is rotationally connected with the side wall of the crushing box (1), the cutting component (3) is used for stirring aquatic weed entering the crushing box (1), the driving component (2) is arranged on one side of the bottom plate of the crushing box (1) close to the filter screen (4), the bottom of the two sides of the length direction of the crushing box (1) is rotationally connected with a rotating wheel (6), the driving assembly (2) is used for driving the crushing box (1) to move.

2. An underwater soil cutting shredder for hydraulic and hydro-power engineering as claimed in claim 1, wherein: cutting assembly (3) wear to locate crushing case (1) along crushing case (1) width direction by the lateral wall of crushing case (1) length direction one side in, cutting assembly (3) are located the outer one end transmission of crushing case (1) and are connected with drive assembly (7), the other end that cutting assembly (3) were kept away from in drive assembly (7) is connected with drive assembly (2) transmission.

3. An underwater soil cutting shredder for hydraulic and hydro-power engineering as claimed in claim 2, wherein: the driving component (2) comprises a driving box (21), a driving shaft (22) and a driving fan (23), the driving box (21) is arranged on one side of the bottom plate of the crushing box (1) close to the filter screen (4), the driving box (21) is fixedly connected to the middle position of the width direction of the bottom plate of the crushing box (1), the driving shaft (22) vertically penetrates through the side wall of the driving box (21) far away from the side of the filter screen (4) from the outside of the driving box (21), one end of the driving shaft (22) positioned in the driving box (21) is sleeved and fixedly connected with a first driving wheel (24), the driving fan (23) is sleeved and fixedly connected with one end of the driving shaft (22) which is positioned outside the driving box (21), one end of the transmission component (7) far away from the cutting component (3) is arranged in the driving box (21) in a penetrating way, one end of the transmission component (7) positioned in the driving box (21) is in transmission connection with the first transmission wheel (24).

4. An underwater soil cutting shredder for hydraulic and hydro-power engineering as claimed in claim 2, wherein: the cutting component (3) comprises a motor (31), a rotating shaft (32) and a blade (33), the rotating shaft (32) vertically penetrates through the crushing box (1) from the side wall of one side of the crushing box (1) in the length direction, and the rotating shaft (32) vertically penetrates through the inner side wall of the other side of the length direction of the crushing box (1), the rotating shaft (32) is rotationally connected with the side walls at the two sides of the crushing box (1) in the length direction, the motor (31) is arranged at one end of the rotating shaft (32) which is positioned outside the crushing box (1), the output shaft of the motor (31) is in transmission connection with the rotating shaft (32), the transmission component (7) is arranged between the outer side wall of the crushing box (1) and the motor (31), and the transmission component (7) is in transmission connection with the rotating shaft (32), the blades (33) are provided with a plurality of blades (33) which are sleeved and fixedly connected with the part of the rotating shaft (32) in the crushing box (1).

5. An underwater soil cutting shredder for hydraulic and hydro-power engineering as claimed in claim 2, wherein: the transmission assembly (7) comprises a second transmission wheel (71), a third transmission wheel (72), a fourth transmission wheel (73), a transmission belt (74) and a transmission shaft (75), the second transmission wheel (71) is sleeved and fixedly connected with one end of the rotating shaft (32) which is positioned outside the crushing box (1), the second transmission wheel (71) is positioned between the motor (31) and the side wall of the crushing box (1), the transmission shaft (75) vertically penetrates through the driving box (21) from the side wall of one side, close to the motor (31), of the driving box (21) in the width direction of the driving box (21), the transmission shaft (75) is rotatably connected with the driving box (21), the third transmission wheel (72) is sleeved and fixedly connected with one end, far away from the driving box (21), of the transmission shaft (75), the transmission belt (74) is sleeved on the side wall of the first transmission wheel (24) and the second transmission wheel (71), the fourth transmission wheel (73) is sleeved and fixedly connected with one end, positioned in the driving box (21), of the transmission shaft (75), the fourth transmission wheel (73) is in transmission connection with the first transmission wheel (24).

6. An underwater soil cutting shredder for hydraulic and hydro-power engineering as claimed in claim 5, wherein: the second transmission wheel (71) and the third transmission wheel (72) are chain wheels, the transmission belt (74) is a chain, the second transmission wheel (71) and the third transmission wheel (72) are both meshed with the transmission belt (74), the first transmission wheel (24) and the fourth transmission wheel (73) are both bevel gears, and the first transmission wheel (24) is meshed with the fourth transmission wheel (73).

7. An underwater soil cutting shredder for hydraulic and hydro-power engineering as claimed in claim 5, wherein: crushing case (1) bottom plate is close to lateral wall fixedly connected with fixed block (76) of transmission shaft (75) one side, the pot head that crushing case (1) was kept away from in fixed block (76) is established and is transmitted and be connected on transmission shaft (75).

8. An underwater soil cutting shredder for hydraulic and hydro-power engineering as claimed in claim 5, wherein: smash lateral wall fixedly connected with that case (1) is close to motor (31) one side and is used for protecting simultaneously protection casing (77) of second drive wheel (71), third drive wheel (72), drive belt (74), rotation axis (32) is located to one pot head that protection casing (77) are close to axis of rotation (32), transmission shaft (75) are located to one pot head that protection casing (77) are close to transmission shaft (75) on, rotation axis (32) all rotate with protection casing (77) with transmission shaft (75) and are connected.