CN109663731A

CN109663731A - A kind of construction site sand sieving machine convenient for safeguarding

Info

Publication number: CN109663731A
Application number: CN201910148080.8A
Authority: CN
Inventors: 张志锋
Original assignee: Individual
Current assignee: Individual
Priority date: 2018-03-22
Filing date: 2019-02-28
Publication date: 2019-04-23
Also published as: CN108405296A

Abstract

The present invention relates to stone sand sub-sieve fields, in particular to a kind of construction site sand sieving machine convenient for safeguarding, including the upper isolation circle set set gradually from top to bottom, separating screen device, transition apparatus and power device, separating screen device includes lower closed circular set, inner wall is covered set on lower closed circular and the cylinder of outer wall can be covered along the sub-sieve conical disc of own axis and set on lower closed circular, upper isolation circle is sheathed on the top of lower closed circular set, and the coaxial setting of the two, upper isolation circle set is capable of the surface for being set to lower closed circular set of vertical sliding by cylinder, transition apparatus includes transition disk and two transition blocks being symmetrically set at the top of transition disk, two transition blocks are respectively positioned on the lower half portion in isolation circle set, power device is set to the bottom of transition disk and is sequentially connected with sub-sieve conical disc, the present invention being capable of automatic sieving stone sand, after and It is continuous stone grain after screening to be excluded, and the sub-sieve conical disc in the present invention can be quickly disassembled, and clean convenient for subsequent artefacts to it.

Description

A kind of construction site sand sieving machine convenient for safeguarding

Technical field

The present invention relates to stone sand sub-sieve field, in particular to a kind of construction site sand sieving machine convenient for safeguarding.

Background technique

Sandstone is because of its good hardness and stable chemical property, often as good construction material, concrete material And it is widely used in the fields such as house, road, highway, railway, engineering.Different aggregate structures differ greatly, some grain thicknesses Uniformly, what is had is not of uniform size；Clast psephicity is fine in some sandstones, and clast corner angle are distinct in some sandstones.Sandstone belongs to loose Object, but the general hardness of its particle is larger, and under ground surface environment, and chemical property is stablized.For sandstone, weatherability Generally relatively strong, especially the quartzy sandstone Jing Guo silication, hardness are more than granite.

When construction place uses sand, use can not be direct plungeed into sand, and it is husky to need to carry out sand sieve Processing, removes foreign particle therein with this, is all often using common sieve to sand processing, this sieve in construction Husky treatment effect is bad, needs just meet the requirements by multiple sieve sand processing, otherwise will affect the construction quality of construction, with People have developed automation sand sieving machine afterwards, and this sand sieving machine cost is high, and more important is internal structure complexity, So the impurity after the screening of part can be accumulated with the increase for using the time, in internal screening washer, and because dismounting is inconvenient, screening washer It cannot be cleaned well, and then influence subsequent sieve sand, led to the sand that should not partially waste and be wasted.

Summary of the invention

In view of the above-mentioned deficiencies in the prior art, it is an object of the present invention to which it is husky with sieve convenient for safeguarding to provide a kind of construction site Machine.

To solve the above problems, the present invention the following technical schemes are provided:

A kind of construction site sand sieving machine convenient for safeguarding, including set gradually from top to bottom upper isolation circle set, separating screen device, Transition apparatus and power device, separating screen device include lower closed circular set, are set to lower closed circular set inner wall and can be along itself axis The sub-sieve conical disc of line rotation and the cylinder that outer wall is covered set on lower closed circular, upper isolation circle are sheathed on the top of lower closed circular set Portion, and the coaxial setting of the two, upper isolation circle set are capable of the surface for being set to lower closed circular set of vertical sliding, transition by cylinder Device includes transition disk and two transition blocks being symmetrically set at the top of transition disk, and two transition blocks are respectively positioned on isolation circle set Interior lower half portion, power device are set to the bottom of transition disk and are sequentially connected with sub-sieve conical disc.

Further, the bottom of the upper isolation circle set offers several openings downward and along its circumferentially-spaced distribution Inserting groove, the shank that is inserted with of vertical sliding is capable of in inserting groove, and shank is located at one end and lower closed circular outside inserting groove The top of set connects, and the cylinder body of cylinder is connect by bolt one with the outer wall that lower closed circular covers, the vertical court of the outbound course of cylinder On, and linkage board is fixed on the piston rod of cylinder, linkage board is solid by the outer wall that circle set lower semisection is isolated in bolt two on Fixed connection.

Further, the outer wall of the lower closed circular set is fixed with a hollow square tube, can in the top of hollow square tube Sliding is inserted with extension square tube, and it is solid to extend the outer wall that circle set is isolated by bolt three in the one end of square tube far from hollow square tube on Fixed connection, hollow square tube and cylinder are symmetrically set in the periphery of lower closed circular set, lower closed circular put at the outer edge of end face for The intermediate incline structure of outer incline offers the discharge of several circumferentially-spaced distributions along lower closed circular set on the intermediate incline Slot.

Further, the inner wall of the upper isolation circle set is embedded with sealing ring, and the bottom of the sealing ring is covered towards upper isolation circle Bottom extend outwardly, the first annular slot that can be connected to each other with the bottom of sealing ring is offered on intermediate incline, it is first annular Slot is connected with all discharge grooves.

Further, the inner wall of the lower closed circular set is fixed is embedded with hinged lantern ring, and hinged lantern ring is located at lower closed circular set Upper half fragment position, sub-sieve conical disc is set to the top of hinged lantern ring, and the bottom of sub-sieve conical disc is equipped with an annular plugboard, Offering at the top of hinged lantern ring can be connected to each other and can also be for annular plugboard along itself with the bottom of annular plugboard Second annular groove of axis rotation, the bottom of sub-sieve conical disc is fixed with the splicing bar being coaxially arranged, sub-sieve conical disc Setting coaxial with hinged lantern ring, upper isolation circle set and lower closed circular set, it is outer that lower closed circular set is extended on the top of sub-sieve conical disc.

Further, the bottom that the top of the transition disk is covered with lower closed circular is fixedly and coaxially connected, power device packet Warehouse and universal driving shaft are included, warehouse is set to the bottom of transition disk, offers hinge hole on transition disk, which runs through transition Disk and with transition disk be coaxially disposed, one end of universal driving shaft and the intracorporal bottom wall in storehouse are hinged, and the other end of universal driving shaft passes through It the intracorporal roof in storehouse and lower closed circular is extended to by hinge hole covers upper half fragment position in inner wall, the one end of universal driving shaft opens up There is the spliced eye being inserted into for the end for splicing bar, spliced eye and splicing bar coaxial arrangement, the outer circumference surface for splicing bar are equipped with It is several along its circumferentially-spaced distribution and end cross-sectional is the positive stop strip of trapezium structure, the inner wall of spliced eye offers several difference With the one-to-one limiting slot of all positive stop strips.

Further, the universal driving shaft is located at the intracorporal one end fixing sleeve in storehouse equipped with bevel gear one, and warehouse is interior to be equipped with an electricity Machine, the motor are located at the periphery of bevel gear one, and fixing sleeve is equipped with the bevel gear being meshed with bevel gear one on the main shaft of motor Two.

Further, two sides similar in two transition blocks are the first bevel structure, and two the first inclined-planes, which are constituted, to be supplied Sand material can by v-shaped cavity, the outer wall fixing sleeve of transition disk lower semisection is equipped with the first charging tray, the periphery pair of first charging tray Title is set there are two tilting material path, and the outer wall of transition disk upper semisection is symmetrically opened up there are two extending to slope surface in v-shaped cavity, and two Slope surface distinguishes one inclination material path of face.

Further, the outer wall fixing sleeve of the lower closed circular set is equipped with the second charging tray, and second charging tray is close to lower closing The bottom setting of circle set.

The utility model has the advantages that a kind of construction site of the invention sand sieving machine convenient for safeguarding, manually passes through upper isolation for sandstone Circle set is poured into lower closed circular set, is then scattered in sub-sieve conical disc, and then motor driven bevel gear one rotates, and engages umbrella Gear two rotates, so that universal driving shaft rotates, universal driving shaft will splice bar with rotation, so that sub-sieve conical disc rotation, and then by stone Sand carries out sub-sieve, (surface of sub-sieve conical disc offers several fine sand holes, and fine sand can be flowed down by the hole), then approach two The v-shaped cavity that first inclined-plane of transition block is constituted continues to fall well, and is flowed down outwardly by slope surface, by the first charging tray and Material path outflow is tilted, so as to artificial treatment, after fine sand sub-sieve, isolation circle set is risen in cylinder driving at this time, sub-sieve The stone grain of taper panel surface is exposed outside, and then sub-sieve conical disc continues rotation, these stone grains flow into second by discharge groove In charging tray, then cylinder resets, and the sealing ring of upper isolation circle set bottom and first annular slot grafting form sealing, guarantee subsequent Stone sand separation when fine sand will not outbound flow, the present invention can automatic sieving stone sand, and it is subsequent also can be by the stone grain after screening It excludes, and the sub-sieve conical disc in the present invention can be quickly disassembled, and clean quite convenient for subsequent artefacts to it.

Detailed description of the invention

Fig. 1 is schematic perspective view of the invention；

Fig. 2 is lateral sectional view of the invention；

Fig. 3 is assembling structure schematic diagram of the invention；

Fig. 4 is the enlarged drawing in Fig. 3 at A；

Fig. 5 is sectional perspective structural schematic diagram one of the invention；

Fig. 6 is sectional perspective structural schematic diagram two of the invention；

Fig. 7 is the enlarged drawing in Fig. 6 at B；

Fig. 8 is sectional perspective structural schematic diagram three of the invention；

Description of symbols: upper isolation circle set 1, sealing ring 1a, shank 1b, inserting groove 1c, separating screen device 2, lower closed circular set 2a, first annular slot 2b, the second charging tray 2c, hinged lantern ring 2d, the second annular groove 2d1, intermediate incline 2e, discharge groove 2f, sub-sieve Conical disc 2g, fine sand hole 2g1, annular plugboard 2g2 splice bar 2k, positive stop strip 2k1, cylinder 2m, linkage board 2m1, hollow square tube 2m2 extends square tube 2m3, power device 3, warehouse 3a, universal driving shaft 3b, bevel gear one 3c, motor 3d, two 3e of bevel gear, spliced eye 3f, limiting slot 3g, transition apparatus 4, transition disk 4a, slope surface 4b, the first charging tray 4c tilt material path 4d, and transition block 4f, first tiltedly Face 4f1, v-shaped cavity 4f2.

Specific embodiment

With reference to the accompanying drawings of the specification and embodiment, specific embodiments of the present invention are described in further detail:

It is upper including what is set gradually from top to bottom referring to figs. 1 to a kind of construction site shown in Fig. 8 sand sieving machine convenient for safeguarding Isolation circle set 1, separating screen device 2, transition apparatus 4 and power device 3, separating screen device 2 include lower closed circular set 2a, are set to lower closing Circle set 2a inner wall and the cylinder that 2a outer wall can be covered along the sub-sieve conical disc 2g of own axis and set on lower closed circular 2m, upper isolation circle set 1 are set to the top of lower closed circular set 2a, and the coaxial setting of the two, and upper isolation circle set 1 can by cylinder 2m The surface for being set to lower closed circular set 2a of vertical sliding, transition apparatus 4 include transition disk 4a and are symmetrically set in transition disk Two transition blocks 4f, two transition block 4f at the top of 4a are respectively positioned on the lower half portion in isolation circle set 1, and power device 3 is set to The bottom of transition disk 4a and with sub-sieve conical disc 2g be sequentially connected.

The bottom of the upper isolation circle set 1 offers several openings downward and along the inserting groove of its circumferentially-spaced distribution Be capable of vertical sliding in 1c, inserting groove 1c is inserted with shank 1b, and shank 1b is located at one end and lower envelope outside inserting groove 1c The top connection of circle set 2a is closed, the cylinder body of cylinder 2m is connect by bolt one with the outer wall that lower closed circular covers 2a, and cylinder 2m's is defeated Direction vertically upward, and is fixed with linkage board 2m1 out on the piston rod of cylinder 2m, linkage board 2m1 by bolt two on every Outer wall from circle 1 lower semisection of set is fixedly connected, and the surface of sub-sieve conical disc 2g offers several fine sand hole 2g1, and fine sand sub-sieve is most After can obtain stone grain, when preventing the more fine sand hole 2g1 blocked on sub-sieve conical disc 2g of stone grain, cylinder 2m work so that on every Rise from circle set 1, so that the surface exposure of sub-sieve conical disc 2g is outwardly, and then stone grain is discharged.

The outer wall of the lower closed circular set 2a is fixed with a hollow square tube 2m2, can slide in the top of hollow square tube 2m2 Dynamic being inserted with extends square tube 2m3, extends the one end of square tube 2m3 far from hollow square tube 2m2 by bolt three and circle set 1 is isolated on Outer wall be fixedly connected, hollow square tube 2m2 and cylinder 2m are symmetrically set in the periphery of lower closed circular set 2a, and lower closed circular covers the upper end 2a It is the intermediate incline 2e structure being inclined outwardly at the outer edge in face, is offered on intermediate incline 2e several along lower closed circular set 2a Circumferentially-spaced distribution discharge groove 2f, when due to sub-sieve conical disc 2g rotation, rotatory force allows stone grain to pass through discharge groove 2f and intermediate incline 2e scatters well opens the surface of sub-sieve conical disc 2g, and then achievees the purpose that exclude stone grain.

The inner wall of the round set 1 of upper isolation is embedded with sealing ring 1a, and the bottom of sealing ring 1a covers 1 bottom towards upper isolation circle Portion extends outwardly, and the first annular slot 2b that can be connected to each other with the bottom of sealing ring 1a, the first ring are offered on intermediate incline 2e Shape slot 2b is connected with all discharge groove 2f, after upper isolation circle set 1 is contacted with lower closed circular set 2a, prevents subsequent fine sand by the two Gap outflow, admittedly use first annular slot 2b and sealing ring 1a, they two can constitute sealing so that subsequent fine sand will not be outer Stream.

The inner wall of the lower closed circular set 2a is fixed to be embedded with hinged lantern ring 2d, and hinged lantern ring 2d is located at lower closed circular set 2a's Upper half fragment position, sub-sieve conical disc 2g is set to the top of hinged lantern ring 2d, and the bottom of sub-sieve conical disc 2g is equipped with an annular and inserts Offering at the top of fishplate bar 2g2, hinged lantern ring 2d can be connected to each other and can also be for annular with the bottom of annular plugboard 2g2 For plugboard 2g2 along the second annular groove 2d1 of own axis, the bottom of sub-sieve conical disc 2g is fixed with coaxial setting Splicing bar 2k, sub-sieve conical disc 2g and hinged lantern ring 2d, upper isolation circle set 1 and the coaxial setting of lower closed circular set 2a, sub-sieve cone The top of shape disk 2g is extended outside lower closed circular set 2a, and sub-sieve conical disc 2g can pass through the annular of annular plugboard 2g2 and second Slot 2d1 is plugged together, and when subsequent sub-sieve conical disc 2g is by power rotation, annular plugboard 2g2 can along the second annular groove 2d1 into Row rotation achievees the purpose that sub-sieve conical disc 2g sub-sieve.

The top of the transition disk 4a and the bottom of lower closed circular set 2a are fixedly and coaxially connected, and power device 3 includes storehouse Body 3a and universal driving shaft 3b, warehouse 3a are set to the bottom of transition disk 4a, offer hinge hole on transition disk 4a, which passes through Across crossing disk 4a and being coaxially disposed with transition disk 4a, one end of universal driving shaft 3b and the bottom wall in warehouse 3a are hinged, linkage The other end of axis 3b passes through the roof in warehouse 3a and extends to the upper half section in lower closed circular set 2a inner wall by hinge hole It sets, the one end of universal driving shaft 3b offers the spliced eye 3f being inserted into for the end for splicing bar 2k, spliced eye 3f and splicing bar 2k coaxial arrangement, the outer circumference surface of splicing bar 2k are equipped with several along its circumferentially-spaced distribution and end cross-sectional is trapezium structure Positive stop strip 2k1, the inner wall of spliced eye 3f offer it is several respectively with the one-to-one limiting slot 3g of all positive stop strip 2k1, due to Accumulation or entirety of the sub-sieve conical disc 2g due to the time are damaged, and can pass through release bolt one, bolt two and spiral shell at this time Then bolt three is taken out by sub-sieve conical disc 2g, splice bar 2k at this time and rise with sub-sieve conical disc 2g, strip extracts limiting slot out 3g, splicing bar 2k is separated with universal driving shaft 3b, subsequent to be stitched and fastened, the rotation of universal driving shaft 3b cooperation positive stop strip 2k1 with Splicing bar 2k is driven rotation by limiting slot 3g.

The universal driving shaft 3b is located at one end fixing sleeve in warehouse 3a equipped with one 3c of bevel gear, and warehouse 3a is interior to be equipped with a motor 3d, motor 3d are located at the periphery of one 3c of bevel gear, and on the main shaft of motor 3d fixing sleeve be equipped be meshed with one 3c of bevel gear Bevel gear two 3e, motor 3d work, by the cooperation of two 3e of one 3c of bevel gear and bevel gear so that universal driving shaft 3b occur from Turn.

Two sides similar in two transition block 4f are the first inclined-plane 4f1 structure, and two the first inclined-plane 4f1 are constituted for sand Material can by v-shaped cavity 4f2, the outer wall fixing sleeve of transition disk 4a lower semisection is equipped with the first charging tray 4c, first charging tray 4c Periphery be symmetrically arranged with two inclination material path 4d, the outer wall of transition disk 4a upper semisection symmetrically opens up that there are two extend to v-shaped cavity Slope surface 4b in 4f2, two slope surface 4b distinguish one inclination material path 4d of face, after fine sand is fallen, are sufficiently fallen by v-shaped cavity 4f2 Enter to two positions slope surface 4b, and flowed out outwardly by slope surface 4b, and approach the first charging tray 4c, subsequently through inclination material path 4d after Continuous outflow.

The outer wall fixing sleeve of the lower closed circular set 2a is equipped with the second charging tray 2c, and the second charging tray 2c is close to lower closed circular set The bottom of 2a is arranged, and stone grain can be flowed directly by discharge groove 2f to the second charging tray 2c, wherein handles convenient for subsequent.

Working principle: sandstone is manually poured into lower closed circular by upper isolation circle set 1 and is covered in 2a, sub-sieve is then scattered in On conical disc 2g, then motor 3d drives one 3c of bevel gear rotation and two 3e of meshing bevel gear, so that universal driving shaft 3b is rotated, linkage Axis 3b will splice bar 2k with rotation, so that sub-sieve conical disc 2g rotation, and then stone sand is subjected to sub-sieve, sub-sieve conical disc 2g's Surface offers several fine sand hole 2g1, and fine sand can be flowed down by the hole, then the first inclined-plane 4f1 of two transition block 4f of approach The v-shaped cavity 4f2 of composition continues to fall well, and is flowed down outwardly by slope surface 4b, passes through the first charging tray 4c and inclination material path 4d outflow after fine sand sub-sieve, is isolated circle and covers 1 and risen at this time so as to artificial treatment in cylinder 2m driving, sub-sieve taper The stone grain on the surface disk 2g is exposed outside, and then sub-sieve conical disc 2g continues rotation, these stone grains flow into the by discharge groove 2f In two charging tray 2c, then cylinder 2m resets, and the sealing ring 1a of 1 bottom of upper isolation circle set and first annular slot 2b grafting are formed close Envelope guarantees that fine sand will not outbound flow when the separation of subsequent stone sand.

The above described is only a preferred embodiment of the present invention, not making any limit to technical scope of the invention System, therefore any subtle modifications, equivalent variations and modifications to the above embodiments according to the technical essence of the invention, In the range of still falling within technical solution of the present invention.

Claims

1. a kind of construction site sand sieving machine convenient for safeguarding, it is characterised in that: including the upper isolation set gradually from top to bottom Circle set (1), separating screen device (2), transition apparatus (4) and power device (3), separating screen device (2) include lower closed circular set (2a), set In lower closed circular set (2a) inner wall and can along own axis sub-sieve conical disc (2g) and be set to lower closed circular set The cylinder (2m) of (2a) outer wall, upper isolation circle set (1) are set to the top of lower closed circular set (2a), and the coaxial setting of the two, on every It is capable of the surface set on lower closed circular set (2a) of vertical sliding by cylinder (2m) from circle set (1), transition apparatus (4) includes Transition disk (4a) and two transition blocks (4f) being symmetrically set at the top of transition disk (4a), two transition blocks (4f) are respectively positioned on Isolation circle set (1) in lower half portion, power device (3) set on transition disk (4a) bottom and with sub-sieve conical disc (2g) Transmission connection.

2. a kind of construction site according to claim 1 sand sieving machine convenient for safeguarding, it is characterised in that: the upper isolation The bottom of circle set (1) offers several open downward and along the inserting groove of its circumferentially-spaced distribution (1c), inserting groove (1c) It is capable of being inserted with shank (1b) for vertical sliding, shank (1b) is located at the one end of inserting groove (1c) outside and lower closed circular set The top of (2a) connects, and the cylinder body of cylinder (2m) is connect by bolt one with the outer wall of lower closed circular set (2a), cylinder (2m) Outbound course vertically upward, and is fixed with linkage board (2m1) on the piston rod of cylinder (2m), linkage board (2m1) passes through bolt Two outer walls that circle set (1) lower semisection is isolated on are fixedly connected.

3. a kind of construction site according to claim 2 sand sieving machine convenient for safeguarding, it is characterised in that: the lower closing The outer wall of circle set (2a) is fixed with a hollow square tube (2m2), and being inserted with for capable of sliding in the top of hollow square tube (2m2) is prolonged It stretches square tube (2m3), extends the one end of square tube (2m3) far from hollow square tube (2m2) by bolt three and the outer of circle set (1) is isolated on Wall is fixedly connected, and hollow square tube (2m2) is symmetrically set in the periphery of lower closed circular set (2a), lower closed circular set (2a) with cylinder (2m) It is intermediate incline (2e) structure being inclined outwardly at the outer edge of upper surface, is offered on the intermediate incline (2e) several along lower envelope Close the discharge groove (2f) of the circumferentially-spaced distribution of circle set (2a).

4. a kind of construction site according to claim 3 sand sieving machine convenient for safeguarding, it is characterised in that: the upper isolation The inner wall of round set (1) is embedded with sealing ring (1a), and the round bottom for covering (1) is isolated to extension towards upper in the bottom of the sealing ring (1a) It stretches, the first annular slot (2b) that can be connected to each other with the bottom of sealing ring (1a) is offered on intermediate incline (2e), it is first annular Slot (2b) is connected with all discharge grooves (2f).

5. a kind of construction site according to claim 4 sand sieving machine convenient for safeguarding, it is characterised in that: the lower closing The inner wall of circle set (2a) is fixed to be embedded with hinged lantern ring (2d), and hinged lantern ring (2d) is located at the upper half section of lower closed circular set (2a) It sets, sub-sieve conical disc (2g) is set to the top of hinged lantern ring (2d), and the bottom of sub-sieve conical disc (2g) is equipped with an annular grafting Plate (2g2), offering at the top of hinged lantern ring (2d) can be connected to each other and can also be for the bottom of annular plugboard (2g2) Annular plugboard (2g2) along own axis the second annular groove (2d1), the bottom of sub-sieve conical disc (2g) be fixed with Its splicing bar (2k) being coaxially disposed, sub-sieve conical disc (2g) and hinged lantern ring (2d), on be isolated to justify and covers (1) and lower closed circular set Lower closed circular set (2a) is extended outside in (2a) coaxial setting, the top of sub-sieve conical disc (2g).

6. a kind of construction site according to claim 5 sand sieving machine convenient for safeguarding, it is characterised in that: the transition circle The top of disk (4a) and the bottom of lower closed circular set (2a) are fixedly and coaxially connected, and power device (3) includes warehouse (3a) and linkage Axis (3b), warehouse (3a) are set to the bottom of transition disk (4a), offer hinge hole on transition disk (4a), which runs through It transition disk (4a) and is coaxially disposed with transition disk (4a), the bottom wall in one end of universal driving shaft (3b) and warehouse (3a) is cut with scissors It connects, the other end of universal driving shaft (3b) passes through the roof in warehouse (3a) and extends to lower closed circular set (2a) inner wall by hinge hole In upper half fragment position, the one end of universal driving shaft (3b) offers the spliced eye that is inserted into of end for splicing bar (2k) (3f), spliced eye (3f) and splicing bar (2k) coaxial arrangement, the outer circumference surface of splicing bar (2k) are equipped with several circumferentially-spaced along its Be distributed and end cross-sectional be the positive stop strip (2k1) of trapezium structure, the inner wall of spliced eye (3f) offer it is several respectively with it is all The one-to-one limiting slot (3g) of positive stop strip (2k1).

7. a kind of construction site according to claim 6 sand sieving machine convenient for safeguarding, it is characterised in that: the universal driving shaft (3b) is located at one end fixing sleeve in warehouse (3a) equipped with bevel gear one (3c), and warehouse (3a) is interior to be equipped with a motor (3d), the electricity Machine (3d) is located at the periphery of bevel gear one (3c), and on the main shaft of motor (3d) fixing sleeve be equipped be meshed with bevel gear one (3c) Bevel gear two (3e).

8. a kind of construction site according to claim 6 sand sieving machine convenient for safeguarding, it is characterised in that: two mistakes Crossing two sides similar in block (4f) is the first inclined-plane (4f1) structure, two the first inclined-planes (4f1) constitute for sand material can by The outer wall fixing sleeve of v-shaped cavity (4f2), transition disk (4a) lower semisection is equipped with the first charging tray (4c), the week of first charging tray (4c) While be symmetrically arranged with two inclination material paths (4d), the outer wall of transition disk (4a) upper semisection symmetrically opens up that there are two extend to v-shaped cavity Slope surface (4b) in (4f2), two slope surfaces (4b) difference one inclination material paths (4d) of face.

9. a kind of construction site according to claim 1 sand sieving machine convenient for safeguarding, it is characterised in that: the lower closing The outer wall fixing sleeve of circle set (2a) is equipped with the second charging tray (2c), which sets close to the bottom of lower closed circular set (2a) It sets.