CN114849832A

CN114849832A - Crushing and screening device for constructional engineering

Info

Publication number: CN114849832A
Application number: CN202210444223.1A
Authority: CN
Inventors: 王孟
Original assignee: Individual
Current assignee: Guo Runling
Priority date: 2022-04-25
Filing date: 2022-04-25
Publication date: 2022-08-05
Anticipated expiration: 2042-04-25
Also published as: CN114849832B

Abstract

The invention discloses a crushing and screening device for constructional engineering, which comprises a box body, wherein the box body is of a rectangular hollow structure, a feed inlet is formed in a position, close to the top, of one side surface of the box body, a discharge outlet is formed in a position, close to the bottom, of the other side of the box body, a feed pipe is arranged at the feed inlet, a first dustproof assembly is arranged in the feed pipe, a discharge pipe is arranged at the discharge outlet, a second dustproof assembly is arranged in the discharge pipe, a multistage crushing assembly is arranged in the box body, a driving assembly used for driving the crushing assembly to work is arranged on the rear end surface of the box body, an adjusting mechanism used for increasing the torque of the crushing assembly is arranged in the driving assembly, and multistage screening assemblies with different sun-drying diameters are further arranged in the box body. Has the advantages that: the device can separately handle the material of equidimension not through one-level screening subassembly, the broken subassembly of one-level, second grade screening subassembly, the broken subassembly of second grade when using to improve the screening effect, and can improve screening efficiency, can also improve the device's life.

Description

Crushing and screening device for constructional engineering

Technical Field

The invention belongs to the technical field of constructional engineering equipment, and particularly relates to a crushing and screening device for constructional engineering.

Background

The building engineering refers to an engineering entity formed by the construction of various building constructions and their auxiliary facilities and the installation of lines, pipelines and equipment matched with them. The house building is provided with a top cover, a beam column, a wall, a foundation and a project which can form an internal space and meet the requirements of people on production, living, study and public activities; need carry out crushing treatment to building material in the building site, but some building material repeatedly uses after crushing treatment, avoids building material to carry out the waste.

The existing crushing and screening device for the building engineering can not crush the materials well when in use, has poor crushing effect, and can easily cause equipment damage and be unusable when materials with higher hardness are crushed in the crushing process; and the existing crushing and screening devices have low efficiency, generate larger dust during crushing and pollute the environment.

Disclosure of Invention

The invention aims to solve the problems and provide a crushing and screening device for constructional engineering.

In order to achieve the technical purpose, the invention provides the following technical scheme:

the invention provides a crushing and screening device for construction engineering, which comprises a box body, wherein the box body is of a rectangular hollow structure, a feed inlet is formed in one side surface of the box body, which is close to the top, a discharge outlet is formed in the other side of the box body, which is close to the bottom, a feed pipe is arranged at the feed inlet, a first dustproof assembly is arranged in the feed pipe, a discharge pipe is arranged at the discharge outlet, a second dustproof assembly is arranged in the discharge pipe, a multistage crushing assembly is arranged in the box body, a driving assembly for driving the crushing assembly to work is arranged on the rear end surface of the box body, an adjusting mechanism for increasing the torque of the crushing assembly is arranged in the driving assembly, and multistage screening assemblies with different airing diameters are also arranged in the box body;

the multistage crushing assembly is divided into a first-stage crushing assembly and a second-stage crushing assembly;

the multi-stage screening component is divided into a first-stage screening component and a second-stage screening component;

the primary screening component, the primary crushing component, the secondary screening component and the secondary crushing component are all arranged in the box body from top to bottom;

the primary screening assembly comprises a first screening plate, the first screening plate is obliquely arranged with one end higher and the other end lower, the high end of the first screening plate is arranged close to the feed inlet and is in rotating fit with the inner wall of the box body, the low end of the first screening plate is connected with a second connecting plate, the inner wall of the box body is provided with a second supporting plate for supporting the second connecting plate, the second supporting plate is vertically arranged, a plurality of first screening holes are uniformly formed in the first screening plate, the second connecting plate is connected with two first moving rods, and the two first moving rods and the second connecting plate are spliced to form an approximate U-shaped structure;

the first-stage crushing assembly is arranged on one side, far away from the feeding hole, of the second supporting plate and comprises a third crushing roller and a fourth crushing roller which are horizontally arranged, the building material falling between the third crushing roller and the fourth crushing roller can be crushed by matching the third crushing roller and the fourth crushing roller, the third crushing roller is arranged close to the second supporting plate, the third crushing roller and the fourth crushing roller are respectively connected with the box body through a third connecting shaft and a fourth connecting shaft, one end of each of the third connecting shaft and the fourth connecting shaft penetrates through the rear end face of the box body and extends into the driving assembly, two second cams are mounted on the third connecting shaft, the two second cams are respectively matched with the two first moving rods, the two second cams are respectively arranged in front of and behind the third crushing roller, and a secondary screening component is arranged below the primary crushing component;

the secondary screening component comprises a second screening plate, the second screening plate is obliquely arranged with one end higher and the other end lower, the high end of the second screening plate is in rotating fit with the inner wall of the box body, the high end of the second screening plate is positioned below the fourth crushing roller, the low end of the second screening plate is connected with a third connecting plate, the box body is provided with a third supporting plate for supporting the third connecting plate, the third supporting plate is vertically arranged, the third supporting plate is positioned between the second supporting plate and the feed inlet, the third connecting plate is connected with two second moving rods, the third connecting plate and the two second moving rods are spliced to form an approximate U-shaped structure, the second screening plate is provided with a plurality of second screening holes, and the secondary screening component is arranged below the second screening plate;

the secondary crushing assembly comprises a first crushing roller and a second crushing roller which are horizontally arranged between a third supporting plate and the feeding hole, the first crushing roller and the second crushing roller are respectively connected with the box body through a first connecting shaft and a second connecting shaft, one ends of the first connecting shaft and one ends of the second connecting shaft penetrate through the rear end of the box body and extend into the driving assembly, the first connecting shaft is connected with two first cams, the two first cams are respectively matched with two second moving rods, the two first cams are respectively arranged at the front and the rear of the first crushing roller, and guide plates are arranged below the secondary crushing assembly;

the material guide plate is obliquely arranged with one end higher and the other end lower, the lower end of the material guide plate is connected with the inner bottom surface of the discharge hole, the higher end of the material guide plate is positioned below the second crushing roller, and the bottom surface of the material guide plate is uniformly connected with a plurality of electromagnets for adsorbing scrap iron;

the driving assembly comprises a protective box connected to the rear end face of the box body, the protective box is provided with a motor, a ninth driven gear, an eleventh driven gear, an eighth driven gear and a seventh driven gear which are respectively arranged on a first connecting shaft, a second connecting shaft, a third connecting shaft and a fourth connecting shaft, the rear end face of the box body is connected with a fifth connecting shaft, the fifth connecting shaft is connected with the output end of the motor through a coupler, the fifth connecting shaft is connected with a first driving gear, one side of the first driving gear is meshed with the third driven gear, the third driven gear is in key connection with the seventh connecting shaft, two ends of the seventh connecting shaft are respectively connected with the outer side of the box body and the inner wall of the protective box, the third driven gear is meshed with the ninth driven gear, and the third driven gear is connected with the eleventh driven gear through a tenth driven gear, the tenth driven gear is in keyed connection with a tenth connecting shaft, and two ends of the tenth connecting shaft are respectively connected with the outer side of the box body and the inner wall of the protective box; the other side of the first driving gear is engaged with a first driven gear, the first driven gear is in keyed connection with a sixth connecting shaft, two ends of the sixth connecting shaft are respectively connected with the outer side of the box body and the inner wall of the protective box, the first driven gear is connected with the eighth driven gear through a fifth driven gear, the fifth driven gear is in keyed connection with an eighth connecting shaft, two ends of the eighth connecting shaft are respectively connected with the outer side of the box body and the inner wall of the protective box, the fifth driven gear is connected with the seventh driven gear through a sixth driven gear, the sixth driven gear is in keyed connection with a ninth connecting shaft, and two ends of the ninth connecting shaft are respectively connected with the outer side of the box body and the inner wall of the protective box;

the first driving gear is connected with the fifth connecting shaft in a rotating and clamping mode, the fifth connecting shaft is connected with a conversion piece matched with the first driving gear in a sliding and clamping mode, and the fifth connecting shaft can drive the first driving gear to rotate through the cooperation of the conversion piece and the first driving gear.

When the crushing and screening device for the building engineering is used, the device is arranged at a fixed position, then building materials enter a box body through a feeding pipe and fall into a first screening plate to be screened, smaller materials fall through a first screening hole, materials which do not pass through the first screening hole roll downwards along the first screening plate, the materials which roll along the first screening plate fall between a third crushing roller and a fourth crushing roller, the third crushing roller and the fourth crushing roller are driven to crush the materials under the operation of a driving assembly, the crushed materials fall downwards and fall onto a secondary screening assembly arranged below a crushing assembly, and when the primary screening assembly works, a third connecting shaft can drive a second cam to rotate, so that a first moving rod matched with the second cam can swing up and down, the material blocking in the first screening hole is avoided, the material crushed by the first-stage crushing component is screened by the second-stage screening component, the crushed material can pass through the second screening hole if the size is proper, and then falls on the second-stage crushing component arranged below the second screening component along the second screening plate for secondary crushing if the size is improper, the second-stage screening component can crush smaller materials directly passing through the first screening hole and can crush the materials guided by the second screening plate, the first crushing roller and the second crushing roller are driven to rotate by the driving component during crushing so as to crush the materials, the crushed materials fall on a guide plate arranged below the second-stage crushing component, the first connecting shaft can drive the first cam to rotate during the operation of the second-stage crushing component, and the second moving rod matched with the second-stage crushing component can move up and down through the rotation of the first cam, reciprocate through the second carriage release lever and can drive the second screening board and rock from top to bottom, thereby can avoid the material card in second screening hole, the stock guide that the slope set up can be to the material of falling on the stock guide derivation of discharge gate department, can start a plurality of electro-magnets of setting in the stock guide bottom in the derivation, through the circular telegram magnetization of a plurality of electro-magnets, can adsorb the iron fillings in the material, after the material is broken to accomplish, can make the electro-magnet outage, then can follow the stock guide by the iron fillings that adsorb on the stock guide and derive to discharge gate department.

Preferably, the conversion piece is of a circular ring structure, the inner wall of the conversion piece is in sliding clamping connection with the outer side of the fifth connecting shaft, a groove of a circular structure is formed in the outer side face of the conversion piece, a plurality of positioning pins are connected to the two end faces of the conversion piece, and a plurality of positioning grooves and a plurality of positioning pins are formed in the end face of the first driving gear in a matched mode.

Preferably, the adjusting mechanism comprises a second driving gear installed on a fifth connecting shaft, the second driving gear is rotatably clamped with the fifth connecting shaft, the conversion part is connected between the first driving gear and the second driving gear, the end face of the second driving gear is also provided with a plurality of positioning grooves matched with the positioning pins, the sixth connecting shaft is connected with a second driven gear matched with the second driving gear in a key manner, the seventh connecting shaft is connected with a fourth driven gear matched with the second driving gear in a key manner, the conversion part is provided with a shifting fork assembly used for driving the conversion part to move, the shifting fork assembly comprises a shifting fork matched with the groove, a connecting rod is vertically installed on the shifting fork, a sliding rod is connected on the connecting rod, and the sliding rod is rotatably clamped with the connecting rod, the sliding rod and the connecting rod are spliced to form an approximate + -type structure, the unconnected end of the sliding rod penetrates through the protective box and is positioned at the rear part of the protective box, a gear shifting handle is vertically arranged at one end of the sliding rod, which is positioned at the outer side of the protective box, the gear shifting handle and the sliding rod are spliced to form an approximate + -type structure, the sliding rod is of a cylindrical structure, a long strip-shaped adjusting block is connected onto the rear end surface of the protective box, the adjusting block is of a quadrangular prism structure, the length direction of the adjusting block is perpendicular to the rear end surface of the protective box, the top surface of the adjusting block is provided with a sliding chute which is of an approximate U-shaped structure, the length direction of the sliding chute is parallel to the length direction of the adjusting block, one side surface of the adjusting block is provided with two notches which are communicated with the sliding chute, the two notches are a first gear and a second gear, and the first gear is arranged between the second gear and the rear end surface of the protective box, the first gear and the second gear are connected with fixing assemblies for fixing gear shifting handles;

the fixing assembly comprises a second mounting groove formed in the inner side wall of the notch, a first mounting groove and the second mounting groove are formed in the outer side of the adjusting block, the second mounting groove and the first mounting groove are spliced to form an L-shaped structure, a clamping pin used for fixing a gear shifting handle is connected in the second mounting groove, one end of the clamping pin is connected with a pulling plate, the pulling plate penetrates through the first mounting groove and is located on the outer side of the adjusting block, and a third spring is connected between the pulling plate and the second mounting groove.

Preferably, the second mounting groove is of a quadrangular prism structure, the bayonet lock is of a quadrangular prism structure, an inclined surface is formed by cutting the upper side of one end, far away from the pulling plate, of the bayonet lock, and the inclined surface is arranged upwards.

Preferably, the two notches are internally and respectively connected with a supporting plate, and a second spring is respectively connected between the bottom surfaces of the two supporting plates and the inner bottom surfaces of the two notches.

As preferred, the inlet pipe is the rectangle structure, the inlet pipe is the low slope setting of the high one end of one end, the low side of inlet pipe with the feed inlet is connected, first dustproof subassembly is including setting up dust guard in the inlet pipe, the vertical setting of dust guard, the dust guard with inlet pipe inner wall normal running fit, the dust guard is kept away from a side of feed inlet with be connected with first spring in the inlet pipe between the top surface.

Preferably, the discharging pipe is the rectangle structure, the discharging pipe is the low slope setting of the high one end of one end, the high end of discharging pipe with the discharge gate is connected, the dustproof subassembly of second includes many protective strip, and many protective strip are all connected be close to low department in the discharging pipe.

Preferably, four corners of the bottom surface of the box body are connected with movable wheels, the front end surface of the box body is provided with two observation windows, the two observation windows are respectively corresponding to the primary crushing mechanism and the secondary crushing mechanism, and one sides of the movable wheels are connected with strut assemblies with adjusting functions.

Preferably, the pillar assembly comprises a first connecting plate connected to the bottom surface of the box body, a threaded rod is connected to the bottom surface of the first connecting plate, a threaded pipe is connected to the outer side of the threaded rod, and a first supporting plate is connected to the bottom surface of the threaded rod.

Preferably, a nut is arranged above the threaded pipe and connected to the outer side of the threaded rod.

Has the advantages that: the device can carry out first-step screening on materials needing to be crushed through the primary screening component, the materials with different sizes are screened out, the larger materials are crushed into smaller materials through the primary crushing component, the smaller materials directly enter the secondary screening component through the primary screening component to be crushed, the materials crushed by the primary crushing component are screened through the secondary screening component, the materials with proper sizes are discharged outwards through the secondary screening component through the material guide plate, the unsuitable materials are further screened through the secondary screening component, the device can separately process the materials with different sizes when in use through the steps, the screening effect is improved, the screening efficiency can be improved, and the service life of the device can be prolonged; the first dustproof assembly and the second dustproof assembly are arranged to play a dustproof effect on feeding and discharging, so that dust is prevented from flying; and still be provided with the adjusting part who is used for strengthening the moment of torsion, make the device can increase the torsion when carrying out the breakage to harder material to can be better carry out broken screening to the material, and can play a protection effect to the motor.

Drawings

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

FIG. 1 is a front view of the present invention;

FIG. 2 is an enlarged view of the portion A of the present invention;

FIG. 3 is a schematic structural view of the present invention;

FIG. 4 is a schematic view of the internal structure of the present invention;

FIG. 5 is an enlarged view of the portion D of the present invention;

FIG. 6 is a schematic structural view of the present invention;

FIG. 7 is an enlarged view of the portion of FIG. 6B of the present invention;

FIG. 8 is a left side view of the present invention;

FIG. 9 is a schematic illustration of a crushing screen assembly of the present invention;

FIG. 10 is a schematic illustration of a crushing screen assembly of the present invention;

FIG. 11 is a schematic illustration of a crushing screen assembly of the present invention;

FIG. 12 is a schematic view of the drive assembly of the present invention;

FIG. 13 is a schematic view of a fork assembly of the present invention;

FIG. 14 is a schematic view of a conversion member of the present invention;

the reference numerals are explained below:

1. a box body; 101. an observation window; 102. a feed pipe; 103. a discharge pipe; 104. a feed inlet; 105. a discharge port; 106. a protective strip; 107. a dust-proof plate; 108. a first spring; 2. a moving wheel; 3. a strut assembly; 301. a first connecting plate; 302. a threaded rod; 303. a threaded pipe; 304. a first support plate; 305. a nut; 4. a protective box; 401. a through hole; 5. a first screening plate; 501. a first screening aperture; 502. a second connecting plate; 503. a first moving bar; 6. a second support plate; 7. a second screening plate; 701. a second screening aperture; 702. a third connecting plate; 703. a second movable bar; 8. a secondary crushing assembly; 801. a first crushing roller; 802. a second crushing roller; 803. a first connecting shaft; 804. a second connecting shaft; 805. a first cam; 9. a primary crushing assembly; 901. a third crushing roller; 902. a third connecting shaft; 903. a fourth crushing roller; 904. a fourth connecting shaft; 905. a second cam; 10. a third support plate; 11. a material guide plate; 1101. an electromagnet; 12. an adjusting block; 1201. a chute; 1202. a notch; 1203. mounting grooves; 1204. a second spring; 1205. a resisting plate; 1206. pulling a plate; 1207. mounting holes; 1208. a third spring; 1209. a bayonet lock; 1210. a first gear; 1211. a second gear; 13. a motor; 14. a first drive gear; 15. a second driving gear; 16. a fifth connecting shaft; 17. a sixth connecting shaft; 18. a first driven gear; 19. a second driven gear; 20. a third driven gear; 21. a fourth driven gear; 22. a seventh connecting shaft; 23. a fork assembly; 2301. a shifting fork; 2302. a connecting rod; 2303. a slide bar; 2304. a shift knob; 24. a conversion member; 2401. a slider; 2402. a groove; 2403. positioning pins; 25. an eighth connecting shaft; 26. a fifth driven gear; 27. a ninth connecting shaft; 28. a sixth driven gear; 29. a seventh driven gear; 30. an eighth driven gear; 31. a ninth driven gear; 32. a tenth driven gear; 33. the tenth is connected with the rotating shaft; 34. an eleventh driven gear.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.

Referring to fig. 1-14, the invention provides a crushing and screening device for construction engineering, comprising a box body 1, wherein the box body 1 is a rectangular hollow structure, a feeding hole 104 is arranged on one side surface of the box body 1 near the top, a discharging hole 105 is arranged on the other side surface near the bottom, a feeding pipe 102 is arranged at the feeding hole 104, a first dustproof assembly is arranged in the feeding pipe 102 to prevent dust generated during crushing and screening of building materials from flying out of the feeding pipe 102, so that pollution can be effectively reduced, a discharging pipe 103 is arranged at the discharging hole 105, a second dustproof assembly is arranged in the discharging pipe 103, a second dustproof assembly is arranged at the discharging pipe 103 to reduce flying dust generated during discharging, so that air pollution is reduced, a multi-stage crushing assembly is arranged in the box body 1, a driving assembly for driving the crushing assembly to work is arranged on the rear end surface of the box body 1, the driving assembly is internally provided with an adjusting mechanism for increasing the torque of the crushing assembly, the adjusting mechanism is arranged for increasing the torque of the crushing assembly and crushing harder materials by the crushing assembly, so that the driving assembly is prevented from being damaged in the crushing process, the effect of protecting the driving assembly is achieved, and a plurality of stages of screening assemblies with different sun-drying diameters are also arranged in the box body 1;

the multi-stage crushing component is divided into a first-stage crushing component 9 and a second-stage crushing component 8;

the primary screening component, the primary crushing component 9, the secondary screening component and the secondary crushing component 8 are all arranged in the box body 1 from top to bottom;

the primary screening assembly comprises a first screening plate 5, the first screening plate 5 is obliquely arranged with one high end and one low end, the high end of the first screening plate 5 is arranged close to the feed inlet 104 and is in running fit with the inner wall of the box body 1, the low end of the first screening plate 5 is connected with a second connecting plate 502, the inner wall of the box body 1 is provided with a second supporting plate 6 for supporting the second connecting plate 502, the second supporting plate 6 is vertically arranged, the first screening plate 5 is uniformly provided with a plurality of first screening holes 501, the second connecting plate 502 is connected with two first moving rods 503, the two first moving rods 503 and the second connecting plate 502 are spliced to form an approximate U-shaped structure, the building materials enter the box body 1 through the feed pipe 102 and fall on the first screening plate 5 in an oblique mode to screen the building materials, the smaller materials fall through the first screening holes 501, and the materials which do not pass through the first screening holes 501 roll downwards along the first screening plate 5;

the first-level crushing assembly 9 is arranged on one side, far away from the feeding hole 104, of the second supporting plate 6, the first-level crushing assembly 9 comprises a third crushing roller 901 and a fourth crushing roller 903 which are horizontally arranged, building materials falling between the third crushing roller 901 and the fourth crushing roller 903 can be crushed through the cooperation of the third crushing roller 901 and the fourth crushing roller 903, the third crushing roller 901 is arranged close to the second supporting plate 6, the third crushing roller 901 and the fourth crushing roller 903 are respectively connected with the box body 1 through a third connecting shaft 902 and a fourth connecting shaft 904, one end of each of the third connecting shaft 902 and the fourth connecting shaft 904 penetrates through the rear end face of the box body 1 and extends into the driving assembly, two second cams 905 are arranged on the third connecting shaft 902, the two second cams 905 are respectively matched with the two first moving rods 905, the two second cams 905 are respectively arranged in front of and behind the third crushing roller 901, a second-level screening assembly is arranged below the first-level crushing assembly 9, the materials rolling along the first screening plate 5 fall between the third crushing roller 901 and the fourth crushing roller 903, the third crushing roller 901 and the fourth crushing roller 903 are driven to crush the materials under the operation of the driving assembly, the crushed materials fall downwards and fall on a secondary screening assembly arranged below the crushing assembly 9, and in addition, when the primary screening assembly 9 works, the third connecting shaft 902 can drive the second cam 905 to rotate, so that the first moving rod 503 matched with the second cam 905 can swing up and down, the materials are prevented from being clamped in the first screening hole 501, the screening efficiency of the primary screening assembly on the materials with different sizes is improved, and the working capacity of the device is improved;

the secondary screening component comprises a second screening plate 7, the second screening plate 7 is arranged in a manner that one end of the second screening plate is higher and the other end of the second screening plate is lower, the high end of the second screening plate 7 is in rotating fit with the inner wall of the box body 1, the high end of the second screening plate 7 is positioned below the fourth crushing roller 903, the lower end of the second screening plate 7 is connected with a third connecting plate 702, the box body 1 is provided with a third supporting plate 10 for supporting the third connecting plate 702, the third supporting plate 10 is vertically arranged, the third supporting plate 10 is positioned between the second supporting plate 6 and the feeding hole 104, the third connecting plate 702 is connected with two second moving rods 703, the third connecting plate 702 and the two second moving rods are spliced to form an approximate U-shaped structure, the second screening plate 7 is provided with a plurality of second screening holes 703, a secondary crushing component 8 is arranged below the second screening plate 7, and screens materials crushed by the primary crushing component 9, the crushed materials can pass through the second screening holes 701 if the sizes are proper, and roll along the second screening plate 7 to fall on a secondary crushing assembly 8 arranged below the second screening assembly for secondary crushing if the sizes are not proper;

the secondary crushing assembly 8 comprises a first crushing roller 801 and a second crushing roller 802 which are horizontally arranged between the third support plate 10 and the feed inlet 104, the first crushing roller 801 and the second crushing roller 802 are respectively connected with the box body 1 through a first connecting shaft 803 and a second connecting shaft 804, one end of each of the first connecting shaft 803 and the second connecting shaft 804 penetrates through the rear end of the box body 1 and extends into the driving assembly, two first cams 805 are connected to the first connecting shaft 803, the two first cams 805 are respectively matched with two second moving rods 703, the two first cams 805 are respectively arranged at the front and back and the rear of the first crushing roller 801, a material guide plate 11 is arranged below the secondary crushing assembly 8, the secondary crushing assembly 8 can crush smaller materials directly passing through the first sieving holes 501 and can crush the materials guided by the second sieving plate 7, the first crushing roller 801 and the second crushing roller 802 are driven by the driving assembly to rotate to crush the materials during crushing, the crushed materials fall into a material guide plate 11 arranged below the secondary crushing assembly 8, the secondary crushing assembly 8 can drive a first cam 805 to rotate through a first connecting shaft 803 during working, a second moving rod 703 matched with the first cam 805 can move up and down through rotation of the first cam 805, and a second screening plate 7 can be driven to shake up and down through up and down movement of the second moving rod 703, so that the materials can be prevented from being clamped in a second screening hole 701, the screening efficiency of the secondary screening assembly can be improved, and the working efficiency of the device is further improved;

the material guide plate 11 is obliquely arranged with a high end and a low end, the low end of the material guide plate 11 is connected with the inner bottom surface of the discharge port 105, the high end of the material guide plate 11 is positioned below the second crushing roller 802, the bottom surface of the material guide plate 11 is uniformly connected with a plurality of electromagnets 1101 for adsorbing iron filings, the material falling on the material guide plate 11 can be guided out towards the discharge port 105 through the obliquely arranged material guide plate 11, the electromagnets 1101 arranged at the bottom of the material guide plate 11 can be started while being guided out, the electromagnets 1101 are energized and magnetized through the electromagnets 1101, the iron filings in the material can be adsorbed, when the material is crushed, the electromagnets 1101 are powered off, and then the iron filings adsorbed on the material guide plate 11 can be guided out towards the discharge port 105 along the material guide plate 11;

the driving assembly comprises a protective box 4 connected to the rear end face of the box body 1, a motor 13, a ninth driven gear 31, an eleventh driven gear 34, an eighth driven gear 30 and a seventh driven gear 29 are mounted on the protective box 4 and are respectively mounted on a first connecting shaft 803, a second connecting shaft 804, a third connecting shaft 902 and a fourth connecting shaft 904, a fifth connecting shaft 16 is connected to the rear end face of the box body 1, the fifth connecting shaft 16 is connected with the output end of the motor 13 through a coupler, a first driving gear 14 is connected to the fifth connecting shaft 16, a third driven gear 20 is meshed with one side of the first driving gear 14, the third driven gear 20 is in key connection with a seventh connecting shaft 22, two ends of the seventh connecting shaft 22 are respectively connected with the outer side of the box body 1 and the inner wall of the protective box 4, the third driven gear 20 is meshed with the third driven gear 31, the ninth driven gear 20 is connected with the eleventh driven gear 34 through a tenth driven gear 32, the tenth driven gear 32 is in key connection with a tenth connecting shaft, and two ends of the tenth connecting shaft are respectively connected with the outer side of the box body 1 and the inner wall of the protection box 4; a first driven gear 18 is meshed with the other side of the first driving gear 14, the first driven gear 18 is in keyed connection with a sixth connecting shaft 17, two ends of the sixth connecting shaft 17 are respectively connected with the outer side of the box body 1 and the inner wall of the protection box 4, the first driven gear 18 is connected with an eighth driven gear 30 through a fifth driven gear 26, the fifth driven gear 26 is in keyed connection with an eighth connecting shaft 25, two ends of the eighth connecting shaft 25 are respectively connected with the outer side of the box body 1 and the inner wall of the protection box 4, the fifth driven gear 26 is connected with a seventh driven gear 29 through a sixth driven gear 28, the sixth driven gear 28 is in keyed connection with a ninth connecting shaft 27, and two ends of the ninth connecting shaft 27 are respectively connected with the outer side of the box body 1 and the inner wall of the protection box 4;

the first driving gear 14 and the fifth connecting shaft 16 are rotatably clamped, the fifth connecting shaft 16 is slidably clamped with a conversion part 24 matched with the first driving gear 14, the fifth connecting shaft 16 can drive the first driving gear 14 to rotate through the matching of the conversion part 24 and the first driving gear 14, the fifth connecting shaft 16 is driven to rotate through the motor 13, the fifth connecting shaft 16 can drive the first driving gear 14 to rotate through the matching of the conversion part 24 and the first driving gear 14, the first driving gear 14 is driven to rotate through the matching of the first driving gear 14, the first driven gear 18 and the third driven gear 20, the first driven gear 18 drives the eighth driven gear 30 to rotate through the fifth driven gear 26, so that the third connecting shaft 902 rotates, the third crushing roller 901 can be further driven to rotate, the fifth driven gear 26 drives the seventh driven gear 29 to rotate through the sixth driven gear 28 while rotating, thereby make the fourth connecting axle rotate, and then can make the fourth crushing roller 904 rotate, the rotation direction of third crushing roller 902 and fourth crushing roller 904 all rotates inwards, rotate through third driven gear 20 like the same, drive ninth driven gear 31 and rotate, further drive first connecting shaft 803 through ninth driven gear 31 and rotate, then third driven gear 20 drives eleventh driven gear 34 through tenth driven gear 32 and rotates, thereby drive second connecting axle 804 and rotate, first connecting shaft 803 and second connecting axle 804 rotate and can make the rotation direction of first crushing roller 801 and second crushing roller 802 all rotate inwards, the rotation direction is as shown by the arrow in fig. 12.

As an optional embodiment, the converter 24 is in a circular ring structure, an inner wall of the converter 24 is slidably engaged with an outer side of the fifth connecting shaft 16, a groove 2402 in a circular structure is formed on an outer side surface of the converter 24, a plurality of positioning pins 2403 are connected to both end surfaces of the converter 24, and a plurality of positioning grooves are formed on an end surface of the first driving gear 14 to be matched with the positioning pins 2403. The adjusting mechanism comprises a second driving gear 15 arranged on a fifth connecting shaft 16, the second driving gear 15 is rotationally clamped with the fifth connecting shaft 16, a conversion part 24 is connected between a first driving gear 14 and the second driving gear 15, the end surface of the second driving gear 15 is also provided with a plurality of positioning grooves matched with the positioning pins 2403, a second driven gear 19 matched with the second driving gear 15 is connected on a sixth connecting shaft 17 in a key way, a fourth driven gear 21 matched with the second driving gear 15 is connected on a seventh connecting shaft 22 in a key way, when the conversion part 24 is matched with the second driving gear 15, the second driven gear 19 and the fourth driven gear 21 can be driven to rotate by the second driving gear 15, a state that a pinion is used for driving a big gear to rotate can be formed, so that the effect of increasing the torque of the connecting shaft can be achieved, when the second driven gear 19 and the fourth driven gear 21 rotate, the sixth driven gear 17 and the seventh connecting shaft 22 can be driven to rotate, the first-stage crushing assembly 9 and the second-stage crushing assembly 8 can be driven to rotate according to the description, and the first driving gear 14 and the second driving gear 15 are rotatably clamped with the fifth connecting shaft 16, so that the fifth connecting shaft 16 cannot be driven to rotate without the cooperation of the conversion piece 24; a shifting fork 2301 assembly 23 for driving the shifting fork 2301 assembly to move is arranged on the conversion element 24, the shifting fork 2301 assembly 23 comprises a shifting fork 2301 matched with a groove 2402, a connecting rod 2302 is vertically arranged on the shifting fork 2301, a sliding rod 2303 is connected on the connecting rod 2302, the sliding rod 2303 is rotationally clamped with the connecting rod 2302, the sliding rod 2303 is spliced with the connecting rod 2302 to form an approximate 'Gamma' shaped structure, the unconnected end of the sliding rod 2303 penetrates through the protective box 4 and is positioned behind the protective box 4, a shifting handle 2304 is vertically arranged on the end of the sliding rod 2303 positioned outside the protective box 4, the shifting handle 2304 is spliced with the sliding rod 2303 to form an approximate 'Brilliant' shaped structure, the sliding rod 2303 is a cylindrical structure, when in use, the sliding rod 2303 can be driven to reciprocate by pulling the shift handle 2304, thereby enabling the connecting rod 2302 to drive the shifting fork 2301 to reciprocate, and further enabling the shifting fork 2301 to drive the converting piece 24 to reciprocate to be matched with the first driving gear 14 or the second driving gear 15; the rear end face of the protective box 4 is connected with a strip-shaped adjusting block 12, the adjusting block 12 is of a quadrangular prism structure, the length direction of the adjusting block 12 is perpendicular to the rear end face of the protective box 4, the top face of the adjusting block 12 is provided with a sliding groove 1201 which is approximately of a U-shaped structure, the length direction of the sliding groove 1201 is parallel to the length direction of the adjusting block 12, one side face of the adjusting block 12 is provided with two notches 1202 which are communicated with the sliding groove 1201, the two notches 1202 are a first gear 1210 and a second gear 1211, the first gear 1210 is arranged between the second gear 1211 and the rear end face of the protective box 4, when the shift handle 2304 is positioned in the first gear 1210, the conversion piece 24 is matched with the first driving gear 14, and when the shift handle 2304 is positioned in the second gear 1211, the conversion piece 24 is matched with the second driving gear 15; a fixing component for fixing the shift knob 2304 is connected to each of the first gear 1210 and the second gear 1211; fixed subassembly is including seting up second mounting groove 1203 on the breach 1202 inside wall, first mounting groove 1203 and second mounting groove 1203 together have been seted up in the regulating block 12 outside, second mounting groove 1203 splices with first mounting groove 1203 and forms and carries out L shape structure, second mounting groove 1203 in-connection has the bayonet lock 1209 that is used for fixed handle 2304 of shifting, bayonet lock 1209 serves and is connected with the arm-tie 1206, the arm-tie 1206 passes first mounting groove 1203 and is located the regulating block 12 outside, be connected with third spring 1208 between arm-tie 1206 and the second mounting groove 1203, second mounting groove 1203 is the quadrangular structure, bayonet lock 1209 is the quadrangular structure, the one end upside that the arm-tie 1206 was kept away from to the bayonet lock 1209 surely forms an inclined plane, the inclined plane upwards sets up. When the shift knob 2304 is pulled to cooperate with the first gear 1210, the reversible shift knob 2304 is clamped into the first gear 1210, the shift knob 2304 pushes the pin 1209 back into the second mounting groove 1203 along the inclined surface of the pin 1209 when clamped into the first gear 1210, and when the shift knob 2304 is lower than the pin 1209, the pin 1209 is ejected by the third spring 1208 to clamp the shift knob 2304, the shift knob 2304 cannot rotate, and the same is true when cooperating with the second gear 1211. All be connected with in two breachs 1202 and support the board 1205, two support and all be connected with second spring 1204 between the bottom surface in board 1205 bottom surface and two breachs 1202, when needing to change the gear, bayonet lock 1209 is arranged in second mounting groove 1203 when can pulling arm-tie 1206, and the handle 2304 of shifting this moment pops out from the gear under the effect of second spring 1204, then the pulling handle 2304 of shifting operates can.

The feeding pipe 102 is of a rectangular structure, the feeding pipe 102 is arranged in a manner that one end of the feeding pipe 102 is higher and the other end of the feeding pipe 102 is lower, the lower end of the feeding pipe 102 is connected with the feeding hole 104, the first dustproof assembly comprises a dustproof plate 107 arranged in the feeding pipe 102, the dustproof plate 107 is vertically arranged, the dustproof plate 107 is in running fit with the inner wall of the feeding pipe 102, a first spring 108 is connected between one side surface of the dustproof plate 107, which is far away from the feeding hole 104, and the inner top surface of the feeding pipe 102, through the dustproof plate 107 and the first spring 108 arranged in the feeding pipe 102, when a material enters the feeding hole 104 from the feeding pipe 102, the material overcomes the elastic force of the first spring 108 under the action of the obliquely arranged feeding pipe 102 to push the dustproof plate 107 open so as to enter the box 1, when the material does not enter the box 1, the dustproof plate 107 returns to the original position under the action of the spring, because the dustproof plate 107 is vertically arranged and the feeding pipe 102 is inclined, the inner bottom surface of the feeding pipe 102 can play a limiting function on the dustproof plate 107, ensuring that it returns to its original position and effectively seals the feed tube 102.

Discharging pipe 103 is the rectangle structure, discharging pipe 103 is the low slope setting of the high one end of one end, discharging pipe 103 is high-end and discharge gate 105 is connected, the dustproof subassembly of second includes many protective strip 106, many protective strip 106 are all connected and are close to low end department in discharging pipe 103, can make the material of getting rid of outward through discharge gate 105 and can avoid the dust to locate outwards the departure from discharging pipe 103 through setting up protective strip 106, its protective strip 106 is the rubber material.

1 bottom surface four corners of box all is connected with removes wheel 2, and the terminal surface is provided with two observation windows 101 before the box 1, and the position of two observation windows 101 is corresponding with the broken mechanism of one-level and the broken mechanism position of second grade respectively, and four remove wheel 2 one side and all be connected with pillar subassembly 3 that has regulatory function, and it is more convenient, convenient to use in order to make the device remove through setting up four removal wheels 2.

The pillar assembly 3 comprises a first connecting plate 301 connected to the bottom surface of the box body 1, a threaded rod 302 is connected to the bottom surface of the first connecting plate 301, a threaded pipe 303 is connected to the outer side of the threaded rod 302, and a first supporting plate 304 is connected to the bottom surface of the threaded rod 302. Nut 305 is arranged above threaded pipe 303, nut 305 is connected to the outer side of threaded rod 302, and nut 305 is arranged above threaded pipe 303 in order to rotate threaded pipe 303 when the distance between first support plate 304 and the bottom surface of box 1 is adjusted properly, and nut 305 is arranged near the top end of threaded pipe 303 by rotating nut 305, so that threaded pipe 303 can not be reversed, the distance between first support plate 304 and box 1 is reduced, and the use is more stable.

By adopting the structure, when the device is used, the device is arranged at a fixed position, then the building materials enter the box body 1 through the feeding pipe 102, fall on the first screening plate 5 which is obliquely arranged to screen the building materials, smaller materials fall through the first screening holes 501, the materials which do not pass through the first screening holes 501 roll downwards along the first screening plate 5, the materials which roll along the first screening plate 5 fall between the third crushing roller 901 and the fourth crushing roller 903, the third crushing roller 901 and the fourth crushing roller 903 are driven to crush the materials under the work of the driving assembly, the crushed materials fall downwards and fall on the secondary screening assembly which is arranged below the crushing assembly 9, and when the primary screening assembly 9 works, the third connecting shaft 902 can drive the second cam 905 to rotate, so that the first moving rod 503 matched with the second cam 905 can swing up and down, avoiding the material from being blocked in the first screening holes 501, screening the material crushed by the first-stage crushing assembly 9 by the second-stage screening assembly, enabling the crushed material to pass through the second screening holes 701 if the crushed material is proper in size, rolling along the second screening plate 7 to fall on the second-stage crushing assembly 8 arranged below the second screening assembly for secondary crushing if the crushed material is improper in size, crushing the smaller material directly passing through the first screening holes 501 by the second-stage screening assembly 8, simultaneously crushing the material guided by the second screening plate 7, driving the first crushing roller 801 and the second crushing roller 802 to rotate to crush the material by the driving assembly during crushing, enabling the crushed material to fall on the guide plate 11 arranged below the second-stage crushing assembly 8, enabling the first connecting shaft 803 to drive the first cam 805 to rotate during the operation of the second-stage crushing assembly 8, enabling the second moving rod 703 matched with the first cam 805 to move up and down, reciprocate through second carriage release lever 703 and can drive second screening board 7 and rock from top to bottom, thereby can avoid the material card in second screening hole 701, the stock guide 11 that the slope set up can be to falling the material on stock guide 11 leading to discharge gate 105 department, a plurality of electro-magnets 1101 that the setting was in the stock guide 11 bottom can be started in the derivation, it is magnetic to be circular telegram through a plurality of electro-magnets 1101, can adsorb iron fillings in the material, after the material breakage is accomplished, can make electro-magnet 1101 cut off the power supply, then the iron fillings adsorbed on stock guide 11 can be followed stock guide 11 and lead to discharge gate 105 department.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be able to cover the technical scope of the present invention and the equivalent alternatives or modifications according to the technical solution and the inventive concept of the present invention within the technical scope of the present invention.

Claims

1. The utility model provides a crushing and screening device for building engineering which characterized in that: the box body (1) is of a rectangular hollow structure, a feeding hole (104) is formed in one side face of the box body (1) close to the top, a discharging hole (105) is formed in the other side face of the box body close to the bottom, a feeding pipe (102) is arranged at the feeding hole (104), a first dustproof assembly is arranged in the feeding pipe (102), a discharging pipe (103) is arranged at the discharging hole (105), a second dustproof assembly is arranged in the discharging pipe (103), a multi-stage crushing assembly is arranged in the box body (1), a driving assembly used for driving the crushing assembly to work is arranged on the rear end face of the box body (1), an adjusting mechanism used for increasing the torque of the crushing assembly is arranged in the driving assembly, and a plurality of stages of screening assemblies with different sun-drying diameters are further arranged in the box body (1);

the multi-stage crushing assembly is divided into a first-stage crushing assembly (9) and a second-stage crushing assembly (8);

the primary screening component, the primary crushing component (9), the secondary screening component and the secondary crushing component (8) are all arranged in the box body (1) from top to bottom;

the primary screening assembly comprises a first screening plate (5), the first screening plate (5) is obliquely arranged with one high end and one low end, the high end of the first screening plate (5) is arranged close to the feed inlet (104) and is in running fit with the inner wall of the box body (1), the low end of the first screening plate (5) is connected with a second connecting plate (502), the inner wall of the box body (1) is provided with a second supporting plate (6) used for supporting the second connecting plate (502), the second supporting plate (6) is vertically arranged, a plurality of first screening holes (501) are uniformly formed in the first screening plate (5), the second connecting plate (502) is connected with two first moving rods (503), and the two first moving rods (503) and the second connecting plate (502) are spliced to form an approximate U-shaped structure;

the first-stage crushing assembly (9) is arranged on one side, far away from the feed port (104), of the second supporting plate (6), the first-stage crushing assembly (9) comprises a third crushing roller (901) and a fourth crushing roller (903) which are horizontally arranged, building materials falling between the third crushing roller (901) and the fourth crushing roller (903) can be crushed through the cooperation of the third crushing roller (901) and the fourth crushing roller (903), the third crushing roller (901) is arranged close to the second supporting plate (6), the third crushing roller (901) and the fourth crushing roller (903) are connected with the box body (1) through a third connecting shaft (902) and a fourth connecting shaft (904) respectively, one ends of the third connecting shaft (902) and the fourth connecting shaft (904) penetrate through the rear end face of the box body (1) and extend into the driving assembly, and two second cams (905) are installed on the third connecting shaft (902), the two second cams (905) are respectively matched with the two first moving rods (503), the two second cams (905) are respectively arranged in front of and behind the third crushing roller (901), and a secondary screening assembly is arranged below the primary crushing assembly (9);

the secondary screening assembly comprises a second screening plate (7), the second screening plate (7) is obliquely arranged with one high end and one low end, the high end of the second screening plate (7) is in running fit with the inner wall of the box body (1), the high end of the second screening plate (7) is positioned below the fourth crushing roller (903), the low end of the second screening plate (7) is connected with a third connecting plate (702), the box body (1) is provided with a third supporting plate (10) for supporting the third connecting plate (702), the third supporting plate (10) is vertically arranged, the third supporting plate (10) is positioned between the second supporting plate (6) and the feeding port (104), the third connecting plate (702) is connected with two second moving rods (703), and the third connecting plate (702) and the two second moving rods (703) are spliced to form an approximate U-shaped structure, a plurality of second screening holes (701) are formed in the second screening plate (7), and a secondary crushing assembly (8) is arranged below the second screening plate (7);

the secondary crushing assembly (8) comprises a first crushing roller (801) and a second crushing roller (802) which are horizontally arranged between the third supporting plate (10) and the feeding hole (104), the first crushing roller (801) and the second crushing roller (802) are respectively connected with the box body (1) through a first connecting shaft (803) and a second connecting shaft (804), one end of each of the first connecting shaft (803) and the second connecting shaft (804) penetrates through the rear end of the box body (1) and extends into the driving assembly, two first cams (805) are connected to the first connecting shaft (803), the two first cams (805) are respectively matched with the two second moving rods (703), the two first cams (805) are respectively arranged at the front and back of the first crushing roller (801), and a material guide plate (11) is arranged below the secondary crushing assembly (8);

the material guide plate (11) is obliquely arranged with one higher end and one lower end, the lower end of the material guide plate (11) is connected with the inner bottom surface of the discharge hole (105), the higher end of the material guide plate (11) is positioned below the second crushing roller (802), and the bottom surface of the material guide plate (11) is uniformly connected with a plurality of electromagnets (1101) for adsorbing scrap iron;

the driving assembly comprises a protection box (4) connected to the rear end face of the box body (1), a motor (13) and a ninth driven gear (31), an eleventh driven gear (34), an eighth driven gear (30) and a seventh driven gear (29) which are respectively installed on a first connecting shaft (803), a second connecting shaft (804), a third connecting shaft (902) and a fourth connecting shaft (904) are installed on the protection box (4), a fifth connecting shaft (16) is connected to the rear end face of the box body (1), the fifth connecting shaft (16) is connected with the output end of the motor (13) through a coupler, a first driving gear (14) is connected to the fifth connecting shaft (16), a third driven gear (20) is meshed to one side of the first driving gear (14), and the third driven gear (20) is connected to the seventh connecting shaft (22) in a keyed mode, two ends of the seventh connecting shaft (22) are respectively connected with the outer side of the box body (1) and the inner wall of the protective box (4), the third driven gear (20) is meshed with the ninth driven gear (31), the third driven gear (20) is connected with the eleventh driven gear (34) through a tenth driven gear (32), the tenth driven gear (32) is in key connection with the tenth connecting shaft, and two ends of the tenth connecting shaft are respectively connected with the outer side of the box body (1) and the inner wall of the protective box (4); the other side of the first driving gear (14) is engaged with a first driven gear (18), the first driven gear (18) is in keyed connection with a sixth connecting shaft (17), two ends of the sixth connecting shaft (17) are respectively connected with the outer side of the box body (1) and the inner wall of the protection box (4), the first driven gear (18) and the eighth driven gear (30) are connected through a fifth driven gear (26), the fifth driven gear (26) is in keyed connection with an eighth connecting shaft (25), two ends of the eighth connecting shaft (25) are respectively connected with the outer side of the box body (1) and the inner wall of the protection box (4), the fifth driven gear (26) is connected with the seventh driven gear (29) through a sixth driven gear (28), and the sixth driven gear (28) is in keyed connection with a ninth connecting shaft (27), two ends of the ninth connecting shaft (27) are respectively connected with the outer side of the box body (1) and the inner wall of the protective box (4);

first driving gear (14) with rotate the joint between fifth connecting axle (16), the slip joint on fifth connecting axle (16) have with first driving gear (14) complex converting part (24), through converting part (24) with first driving gear (14) cooperation can make fifth connecting axle (16) drive first driving gear (14) and rotate.

2. A construction crushing and screening device according to claim 1, wherein: the novel gear box is characterized in that the conversion piece (24) is of a circular ring-shaped structure, the inner wall of the conversion piece (24) is connected with the outer side of the fifth connecting shaft (16) in a sliding and clamping mode, a groove (2402) of an annular structure is formed in the outer side face of the conversion piece (24), a plurality of positioning pins (2403) are connected to two end faces of the conversion piece (24), and a plurality of positioning grooves and a plurality of positioning pins (2403) are formed in the end face of the first driving gear (14) in a matched mode.

3. A construction crushing and screening device according to claim 2, wherein: the adjusting mechanism comprises a second driving gear (15) installed on a fifth connecting shaft (16), the second driving gear (15) is rotationally clamped with the fifth connecting shaft (16), a conversion part (24) is connected between a first driving gear (14) and the second driving gear (15), a plurality of positioning grooves matched with the positioning pins (2403) are also formed in the end face of the second driving gear (15), a second driven gear (19) matched with the second driving gear (15) is connected to the sixth connecting shaft (17) in a key mode, a fourth driven gear (21) matched with the second driving gear (15) is connected to the seventh connecting shaft (22) in a key mode, a shifting fork (2301) component (23) used for driving the conversion part to move is arranged on the conversion part (24), and the shifting fork (2301) component (23) comprises a shifting fork (2301) matched with the groove (2402), the shift fork (2301) is vertically provided with a connecting rod (2302), the connecting rod (2302) is connected with a sliding rod (2303), the sliding rod (2303) is connected with the connecting rod (2302) in a rotating and clamping manner, the sliding rod (2303) is spliced with the connecting rod (2302) to form an approximate + -type structure, the unconnected end of the sliding rod (2303) penetrates through the protective box (4) and is located at the rear of the protective box (4), the sliding rod (2303) is located at one end of the outer side of the protective box (4) and is vertically provided with a gear shifting handle (2304), the gear shifting handle (2304) is spliced with the sliding rod (2303) to form an approximate + -type structure, the sliding rod (2303) is a cylindrical structure, the rear end face of the protective box (4) is connected with a regulating block (12) in a long strip manner, the regulating block (12) is in a quadrangular structure, and the length direction of the regulating block (12) is perpendicular to the rear end face of the protective box (4), the top surface of the adjusting block (12) is provided with a sliding groove (1201) with an approximate U-shaped structure, the length direction of the sliding groove (1201) is parallel to the length direction of the adjusting block (12), one side surface of the adjusting block (12) is provided with two notches (1202) communicated with the sliding groove (1201), the two notches (1202) are a first gear (1210) and a second gear (1211), the first gear (1210) is arranged between the second gear (1211) and the rear end surface of the protective box (4), and the first gear (1210) and the second gear (1211) are both connected with fixing components for fixing a gear shifting handle (2304);

fixed subassembly is including offering second mounting groove (1203) on jagged (1202) inside wall, first mounting groove (1203) have been seted up in regulating block (12) outside with second mounting groove (1203) together, second mounting groove (1203) with first mounting groove (1203) concatenation forms and carries out L shape structure, bayonet lock (1209) in-connection that is used for fixed handle (2304) of shifting, bayonet lock (1209) serve and are connected with arm-tie (1206), arm-tie (1206) pass first mounting groove (1203) are located the regulating block (12) outside, arm-tie (1206) with be connected with third spring (1208) between second mounting groove (1203).

4. A construction crushing and screening device according to claim 3, wherein: the second mounting groove (1203) is of a quadrangular structure, the clamping pin (1209) is far away from the upper side of one end of the pulling plate (1206), an inclined plane is formed by cutting, and the inclined plane is arranged upwards.

5. A construction crushing and screening device according to claim 3, wherein: abutting plates (1205) are connected in the two notches (1202), and second springs (1204) are connected between the bottom surfaces of the two abutting plates (1205) and the inner bottom surfaces of the two notches (1202).

6. A construction crushing and screening device according to claim 1, wherein: the inlet pipe (102) are the rectangle structure, inlet pipe (102) are the low slope setting of the high one end of one end, the low side of inlet pipe (102) with feed inlet (104) are connected, first dustproof subassembly is including setting up dust guard (107) in inlet pipe (102), dust guard (107) vertical setting, dust guard (107) with inlet pipe (102) inner wall normal running fit, keep away from dust guard (107) a side of feed inlet (104) with be connected with first spring (108) in inlet pipe (102) between the top surface.

7. A construction crushing and screening device according to claim 1, wherein: discharging pipe (103) are the rectangle structure, discharging pipe (103) are the low slope setting of the high one end of one end, the high end of discharging pipe (103) with discharge gate (105) are connected, the dustproof subassembly of second includes many protective strip, and many protective strip are all connected be close to low point department in discharging pipe (103).

8. A construction crushing and screening device according to claim 1, wherein: box (1) bottom surface four corners all is connected with and removes wheel (2), the terminal surface is provided with two observation windows (101) before box (1), and the position of two observation windows (101) is corresponding with one-level crushing mechanism and second grade crushing mechanism position respectively, four it all is connected with pillar subassembly (3) that have regulatory function to remove wheel (2) one side.

9. A construction crushing and screening device according to claim 8, wherein: the strut assembly (3) comprises a first connecting plate (301) connected to the bottom surface of the box body (1), a threaded rod (302) is connected to the bottom surface of the first connecting plate (301), a threaded pipe (303) is connected to the outer side of the threaded rod (302), and a first supporting plate (304) is connected to the bottom surface of the threaded rod (302).

10. A construction crushing and screening device according to claim 9, wherein: a nut (305) is arranged above the threaded pipe (303), and the nut (305) is connected to the outer side of the threaded rod (302).