CN110355328B

CN110355328B - A roller mill for moulding sand production line

Info

Publication number: CN110355328B
Application number: CN201910755203.4A
Authority: CN
Inventors: 杜兴; 杜法良
Original assignee: Hangzhou Chancel Machinery Co ltd
Current assignee: Hangzhou Chancel Machinery Co ltd
Priority date: 2019-08-15
Filing date: 2019-08-15
Publication date: 2020-11-24
Anticipated expiration: 2039-08-15
Also published as: CN110355328A

Abstract

The invention relates to a sand mixer for a sand molding production line, which comprises a rack, a sand storage bin, a machine base, a large arm and a small arm, wherein the rack is arranged on the rack; a rotating shaft which is coaxial with a sand storage bin discharge port is fixed below the second shell, the rotating shaft is connected to the base in an inserting and rotating mode, a first driving wheel is coaxially fixed on the rotating shaft, a first gear is connected to the first driving wheel, a second gear and a third gear which is meshed with the first gear and the second gear are connected to the base in a rotating mode, a first worm is fixed on an output shaft of the first motor, a first worm wheel is meshed with the first worm, a first rotating shaft is fixed on the first worm wheel, and a second rotating shaft connected with the first rotating shaft is arranged on the second gear; the base is also provided with a first driving piece for driving the third gear to do linear displacement motion. The invention realizes the circumferential rotation work of the large arm by means of the motor of the large arm, and achieves the effects of reducing the number of the motors and reducing the production cost.

Description

A roller mill for moulding sand production line

Technical Field

The invention relates to the technical field of mold sand manufacturing, in particular to a sand mixer for a mold sand production line.

Background

Clay sand molds can be classified into wet, dry and surface-dried sand molds at present. The main differences between the three are: the wet type is that the manufactured sand mould is directly poured into high-temperature metal liquid without being dried; the dry sand mold is to send the whole sand mold into a kiln for drying before mold assembling and casting; the surface drying sand mould is only used for drying the surface layer of the cavity by a certain depth by a proper method before casting. The clay green sand is also called green sand, is a casting process method with the longest history and has the widest application range. In the vigorous development of various chemically bonded sands, the clay green sand is still the most important molding material, has wide application range and large consumption, and is incomparable with any other molding material. The green sand is made up by mixing raw sand, bentonite, additive and water in a certain proportion in a sand mixer. The common charging sequence is that the reclaimed sand and the dry materials such as new sand, bentonite, coal powder and the like are mixed uniformly, and then water is added to be mixed to the required index.

The traditional Chinese patent with the publication number of CN207952526U discloses a movable double-arm continuous sand mixer, which comprises a trolley, wherein a sand storage bin, a double-arm sand mixer, an air compressor, a bag-type dust collector and a PLC (programmable logic controller) electrical control cabinet are arranged on the trolley, and the PLC electrical control cabinet is respectively connected with the air compressor, the bag-type dust collector, the double-arm sand mixer and a controlled end of a trolley driving mechanism; the double-arm sand mixer comprises a machine base, a large arm and a small arm, a movable seat is arranged above a first horizontal swing mechanism, a fixed support is fixedly arranged on the movable seat, the large arm is arranged on the fixed support through a third vertical swing mechanism, and a lifting mechanism is arranged between the middle of the bottom end face of the large arm and the movable seat.

The above prior art solutions have the following drawbacks: as can be known from fig. 1 of the specification of the prior art, the circumferential rotation of the large arm relative to the base and the circumferential rotation of the small arm relative to the large arm are controlled by separate motors, and the large arm and the small arm have one motor, so that the circumferential rotation of the large arm and the small arm can be realized by the motors on the large arm and the small arm, and the number of the motors can be saved undoubtedly; therefore, a new sand mixer needs to be designed to solve the above problems.

Disclosure of Invention

The invention aims to provide a sand mixer for a sand molding production line, which has the advantages that the circumferential rotation work of a large arm is realized by means of a motor of the large arm, and the effects of reducing the number of the motors and reducing the production cost are achieved.

The above object of the present invention is achieved by the following technical solutions:

a sand mixer for a sand molding production line comprises a rack, a sand storage bin arranged on the rack, a base arranged below the sand storage bin, a large arm which is obliquely arranged along a vertical plane and is rotatably connected to the base, and the lower side of the large arm is communicated with a discharge port of the sand storage bin; the large arm comprises a first shell, a spiral conveying blade and a first motor, wherein the spiral conveying blade is rotatably connected in the first shell, and the first motor is arranged on the lower side of the first shell and drives the spiral conveying blade to rotate; the small arm comprises a second shell, a sand mixing blade and a second motor, wherein the sand mixing blade is rotatably connected in the second shell, and the second motor is arranged on one side of the second shell, which faces the first shell, and drives the sand mixing blade to rotate; a rotating shaft which is coaxial with a sand storage bin discharge port is fixed below the second shell, the rotating shaft is connected to the base in an inserting and rotating mode, a first driving wheel is coaxially fixed on the rotating shaft, a first gear is connected to the first driving wheel, a second gear and a third gear which is meshed with the first gear and the second gear are connected to the base in a rotating mode, a first worm is fixed on an output shaft of the first motor, a first worm wheel is meshed with the first worm, a first rotating shaft is fixed on the first worm wheel, and a second rotating shaft connected with the first rotating shaft is arranged on the second gear; the base is also provided with a first driving piece for driving the third gear to do linear displacement motion.

By adopting the technical scheme, when in sand mixing, the sand in the sand storage bin falls into the first shell, the first motor drives the spiral conveying blade to rotate to convey the sand into the second shell, and then the second motor drives the sand mixing blade to rotate to stir the raw materials, so that the sand and other raw materials are stirred into a whole, the preparation work of the mould sand is realized, and the mould sand is discharged from the second shell for use;

in the process, when the large arm needs to rotate, the driving piece drives the displacement shaft to drive the gear three to linearly displace, so that the gear three is simultaneously meshed with the gear I and the gear II, and then the motor I rotates to drive the worm I to rotate, so that the worm wheel I and the rotating shaft I are driven to rotate;

when the large arm rotates to a proper angle, the gear III can be driven to move away from one side of the gear II, the contact gear II and the gear I are in linkage work, and the motor I can independently drive the spiral conveying blade to rotate;

in the process, the purchase cost and the maintenance cost of the motor are high, and the number of the motors is reduced, so that the cost can be reduced on one hand, and the occupied area of the motor can be reduced on the other hand.

The invention is further configured to: the three coaxial displacement axles that are fixed with of gear one, driving piece one including set up on the frame and supply a gliding spout of displacement axle, rotate connect in the spout pass displacement axle one and with a displacement axle screw-thread fit's lead screw one, lead screw one end extends to outside the frame, and is fixed with hand wheel one in the outer one end of frame.

By adopting the technical scheme, the screw thread matching relationship between the first screw rod and the first displacement shaft and the guiding effect of the sliding groove on the first displacement shaft are utilized, when the first screw rod is rotated, the linear displacement work of the third gear driven by the first displacement shaft can be realized, and the third gear is driven to be meshed with the first gear and the second gear or to be far away from the first gear and the second gear; a first hand wheel is arranged on the first screw rod, so that a worker can conveniently drive the first screw rod to rotate.

The invention is further configured to: the gear three-axis is fixed with a displacement shaft I, a driving piece I comprises a mounting seat I, a sliding groove I arranged in the mounting seat I and a sliding rod I inserted in the sliding groove I, one end of the sliding rod I is fixed with the side wall of the displacement shaft I, the side wall of the sliding rod I, which is located in the mounting seat I, is fixed with a displacement block I, the cross section of the displacement block is in an isosceles trapezoid shape with the lower bottom fixed with the sliding rod I, a displacement groove I for the displacement block I to slide is arranged in the mounting seat I, a driving block I and a driving block II are correspondingly arranged in the displacement groove I, the driving block I and the driving block II are respectively abutted against two waist inclined planes of the displacement block I, a screw rod I and a screw rod II are further rotatably connected in the displacement groove I, and the screw rod II respectively penetrate through the driving block I and the driving block II and are in threaded fit with the driving block I and the driving block II.

By adopting the technical scheme, when the first screw rod and the second screw rod rotate, under the matching action of the first screw rod and the second screw rod with the threads of the first driving block and the second driving block respectively, the synchronous reverse displacement of the first driving block and the second driving block can be realized, and further under the transmission work of the first driving block and the second driving block with the inclined planes of the first displacement block and the second displacement block, the linear displacement work adjustment of the first sliding rod can be realized, so that under the fixed action of the first sliding rod and the first displacement shaft, the linear reciprocating displacement work of the third gear can be driven;

meanwhile, the first driving block and the second driving block are always abutted to the two waists of the first displacement block, when no external force is used for driving the first screw rod and the second screw rod to rotate, the first driving block and the second driving block can stably limit the displacement block, so that the third gear is more stable, the third gear is more stable in the process of meshing the first gear and the second gear, and the first motor is better used for driving the first driving wheel to rotate.

The invention is further configured to: : the screw thread directions of the first screw and the second screw are arranged in the same direction, and a gear four and a gear five which are meshed with each other are coaxially fixed on the first screw and the second screw respectively; one end of the first screw rod extends out of the first mounting seat, and a second hand wheel is arranged at one end, outside the first mounting seat, of the first screw rod.

By adopting the technical scheme, the meshing action of the gear four and the gear five is utilized, so that the screw rod two can be driven to synchronously and reversely rotate only by driving the screw rod one to rotate; furthermore, as the screw thread directions of the first screw and the second screw are the same, when the first screw and the second screw synchronously rotate in opposite directions, the synchronous opposite displacement work of the first driving block and the second driving block can be realized; and then the second hand wheel is utilized, so that the worker can drive the first screw rod to rotate.

The invention is further configured to: a discharge pipe is vertically arranged at the lower end of the higher side of the first shell, a feed pipe which is coaxially arranged with the discharge pipe is vertically communicated with the upper end of the second shell, a limiting ring is arranged at the lower end of the discharge pipe, an annular groove is formed in the limiting ring, a second transmission wheel which can only be connected in the annular groove in a circumferential rotating mode is fixed at the upper end of the discharge pipe, a sixth gear, a seventh gear and an eighth gear are further rotatably connected to the second shell, the sixth gear drives the second transmission wheel to rotate, and the eighth gear is located between the sixth gear and the seventh gear and is simultaneously meshed with the sixth gear and the seventh; a second worm is coaxially fixed on an output shaft of the second motor, a second worm wheel is meshed with the second worm, and the second worm wheel and the seventh gear are coaxially arranged and are communicated into a whole through a third rotating shaft; and a second driving piece for driving the eight gears to linearly displace is further arranged on the second shell.

By adopting the technical scheme, the discharging pipe and the feeding pipe are coaxially arranged, and the circumferential rotation relation between the second driving wheel and the annular groove is utilized, so that the second shell can rotate relative to the first shell;

the second driving part drives the eighth gear to realize the meshing of the sixth gear and the seventh gear, and then the second motor is started to drive the second worm wheel to rotate so as to drive the third rotating shaft and the seventh gear to rotate, so that the sixth gear can be driven to drive the second driving wheel to rotate, and the second shell can be driven to rotate relative to the first shell; the circumferential rotation work of the small arm can be realized by directly utilizing the second motor without additionally arranging an independent motor, and the using number of the motors is reduced.

The invention is further configured to: a second displacement shaft is coaxially fixed on the eighth gear, and the lower end of the second displacement shaft is abutted against the upper end of the second shell; the driving piece II comprises a screw rod II and a hand wheel III, the screw rod II is rotatably connected to the shell II and penetrates through the displacement shaft II to be in threaded fit with the displacement shaft II, and the hand wheel III is coaxially fixed with one end of the screw rod II.

By adopting the technical scheme, the screw thread matching relationship between the screw rod II and the displacement shaft II is utilized, the lower end of the displacement shaft II is abutted against the shell II, and the rotation work of the displacement shaft II is limited; when the second screw rod is rotated, the second displacement shaft can be driven to drive the linear displacement of the eighth gear to work, so that the engagement work of the eighth gear with the sixth gear and the seventh gear is realized, or the second screw rod is far away from the sixth gear and the seventh gear, and meanwhile, under the friction force of the second screw rod and the second displacement shaft, when the second screw rod is driven to rotate without external force, the second displacement shaft can be limited; and then set up hand wheel three on lead screw two, can make things convenient for the staff to order about the rotation work of lead screw two.

The invention is further configured to: eight coaxial being fixed with displacement axle two of gear, driving piece two includes mount pad two, sets up sliding tray two in mount pad two, pegs graft in sliding tray two, two one end of sliding tray are fixed with the lateral wall of displacement axle two, the lateral wall that sliding tray two is in mount pad two is fixed with a displacement piece two, two cross-sections of displacement piece are the isosceles trapezoid setting that the lower bottom is fixed with sliding tray two, set up the gliding displacement groove two that supplies displacement piece two in the mount pad two, still correspond in the displacement groove two and set up drive block three, drive block four, drive block three and drive block four respectively with two waist inclined plane butts of displacement piece two, it is connected with screw rod three, screw rod four still to rotate in the displacement groove two, screw rod three, screw rod four pass drive block three, drive block four respectively and with drive block three, drive block four screw-thread fit.

By adopting the technical scheme, when the third screw and the fourth screw rotate, under the matching action of the third screw and the fourth screw with the third driving block and the fourth driving block respectively, synchronous reverse displacement of the third driving block and the fourth driving block can be realized, further, under the transmission work of the third driving block and the fourth driving block with the inclined planes of the two waists of the second displacement block, the linear displacement work adjustment of the second sliding rod can be realized, and thus under the fixed action of the second sliding rod and the second displacement shaft, the linear reciprocating displacement work of the eighth gear can be driven;

meanwhile, the driving block III and the driving block IV are always abutted against two waists of the displacement block II, when no external force drives the screw rod III and the screw rod IV to rotate, the driving block III and the driving block IV can perform stable limiting work on the displacement block II, so that the position of the gear eight of the driving block III is more stable, the driving block III and the driving block IV are more stable in the process of meshing the gear I and the gear II, and the rotation work of the driving wheel II is better realized by the motor II.

The invention is further configured to: the thread directions of the third screw and the fourth screw are arranged in the same direction, and a gear nine and a gear ten which are meshed with each other are coaxially fixed on the third screw and the fourth screw respectively; one end of the third screw rod extends to the outside of the mounting seat, and a hand wheel IV is arranged at one end of the third screw rod, which is positioned at the outside of the mounting seat.

By adopting the technical scheme, the meshing action of the nine gears and the ten gears is utilized, so that the screw rod four can be driven to synchronously and reversely rotate only by driving the third screw rod to rotate; furthermore, as the thread directions of the third screw and the fourth screw are the same, when the third screw and the fourth screw synchronously rotate in opposite directions, the synchronous and opposite displacement work of the third driving block and the fourth driving block can be realized; and then utilize hand wheel four, the staff of being convenient for orders about the rotation work of screw rod three.

The invention is further configured to: the first shell is internally divided into a feeding cavity and a containing cavity, wherein the feeding cavity is used for respectively accommodating the spiral conveying blade, the first worm wheel and the first worm, and one end of a conveying shaft of the spiral conveying blade extends into the containing cavity and is coaxially connected with an output shaft of the first motor.

Through adopting above-mentioned technical scheme, form two mutually independent pay-off chambeies in casing one and hold chamber one, make its worm wheel one, worm one can set up in holding chamber one, and the raw materials is carried in the pay-off intracavity, can not get into to holding chamber one in, avoids the raw materials to influence the rotation work of worm wheel one, worm one.

The invention is further configured to: the second shell is divided into a sand mixing cavity for respectively placing a sand mixing blade, a second worm wheel and a second worm and a second accommodating cavity, and one end of a sand mixing shaft of the sand mixing blade extends into the second accommodating cavity and is coaxially connected with an output shaft of the second motor.

Through adopting above-mentioned technical scheme, form two mutually independent muddy sand chambeies in casing two and hold chamber two, make its worm wheel two, worm two can set up in holding chamber people, and the raw materials stirs at the mulling intracavity, can not get into to holding chamber two in, avoid the raw materials to influence the rotation work of worm wheel two, worm two.

In conclusion, the beneficial technical effects of the invention are as follows:

1. the first driving part is used for driving the third gear to displace relative to the second gear, when the circumferential rotation of the large arm is required to be realized, the third gear can be driven to be meshed with the second gear and the first gear, so that the first driving wheel can be driven to rotate by directly utilizing the driving force of the first motor, the circumferential rotation of the large arm is realized, and the first motor can be used as a driving source for the circumferential rotation of the large arm while meeting the requirement of driving a spiral conveying blade, so that the required motors are reduced, and the production cost can be reduced to a certain extent;

2. the second driving part is used for driving the eight gear to displace relative to the seventh gear, when the circumferential rotation of the small arm is required to be realized, the eight gear can be driven to be meshed with the six gear and the seventh gear, so that the eight gear can directly drive the second driving wheel to rotate by using the driving force of the second motor, the circumferential rotation of the small arm is realized, and the second motor can be used as a driving source for the circumferential rotation of the small arm while the second motor drives the sand mulling blade, so that the motors required to be used are reduced, and the production cost can be further reduced.

Drawings

Fig. 1 is a schematic overall structure diagram of the first embodiment.

Fig. 2 is a partial structural schematic view of the first housing and the first motor in fig. 1.

Fig. 3 is an enlarged schematic view at a in fig. 2.

Fig. 4 is a partial structural schematic diagram of the second housing and the second motor in fig. 1.

Fig. 5 is an enlarged schematic view at B in fig. 4.

FIG. 6 is a schematic cross-sectional view of a first driving member according to a second embodiment.

Fig. 7 is an enlarged schematic view at C in fig. 6.

FIG. 8 is a schematic sectional view of a second driving member according to a second embodiment.

Fig. 9 is an enlarged schematic view at D in fig. 8.

In the figure, 1, a frame; 2. a sand storage bin; 3. a machine base; 4. a large arm; 41. a first shell; 42. a first accommodating cavity; 43. a spiral conveying blade; 44. a first motor; 45. a discharge pipe; 46. a feeding cavity; 5. a small arm; 51. a second shell; 52. a second accommodating cavity; 53. a sand mixing cavity; 54. a sand mulling blade; 55. a second motor; 56. a feed pipe; 57. discharging the material pipe; 6. a first driving part; 61. a first screw rod; 62. a chute; 63. a first hand wheel; 64. a first mounting seat; 65. a first sliding groove; 66. a first sliding rod; 67. a first displacement block; 68. a first driving block; 69. a second driving block; 610. a first screw rod; 611. a second screw; 612. a first guide rod; 613. a second guide rod; 614. a third hand wheel; 615. a fourth gear; 616. a fifth gear; 617. a first displacement groove; 7. a driving part II; 71. a second screw rod; 72. a second hand wheel; 73. a second mounting seat; 74. a second sliding groove; 75. a second sliding rod; 76. a second displacement block; 77. a third driving block; 78. driving block four; 79. a third screw; 710. a screw rod IV; 711. a third guide rod; 712. a fourth guide rod; 713. a fourth hand wheel; 714. a ninth gear; 715. ten gears; 716. a second displacement groove; 8. a discharge pipe; 9. a rotating shaft; 10. a first transmission wheel; 11. a third driving wheel; 12. a first transmission belt; 13. a first gear; 14. a second gear; 15. a third gear; 16. a first worm; 17. a first worm wheel; 18. a first rotating shaft; 19. a second rotating shaft; 20. a first bevel gear; 21. a second bevel gear; 22. a first displacement shaft; 23. a second driving wheel; 24. a fourth driving wheel; 25. a second transmission belt; 26. a sixth gear; 27. a seventh gear; 28. eighth gear; 29. a second worm; 30. a second worm gear; 31. a rotating shaft III; 32. a second displacement shaft; 33. a limit ring.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Example 1: referring to fig. 1, the sand mixer for a sand molding production line disclosed by the invention comprises a frame 1, a sand storage bin 2, a machine base 3, a large arm 4 and a small arm 5; the machine frame 1 is erected on the ground, the sand storage bin 2 is fixed on the machine frame 1 and used for storing raw materials, and the lower end of the sand storage bin 2 is communicated with a discharge pipe 8; the machine base 3 is arranged right below the discharge pipe 8. Referring to fig. 1 and 2: the large arm 4 comprises a first shell 41, a spiral conveying blade 43 and a first motor 44; the first shell 41 is obliquely arranged along the vertical surface, and the lower side of the first shell is positioned below the discharge pipe 8; the first shell 41 is internally isolated into a first accommodating cavity 42 and a feeding cavity 46; the first motor 44 is fixed at the lower side of the first shell 41, and the output shaft extends into the first accommodating cavity 42; the spiral conveying blade 43 is rotatably connected into the material conveying cavity 46, and a conveying shaft of the spiral conveying blade 43 extends into the accommodating cavity I42 and is coaxially fixed with an output shaft of the motor I44; the upper end of the material feeding cavity 46 is communicated with the material discharging pipe 8 and is rotatably connected with the material discharging pipe 8; a rotating shaft 9 is coaxially fixed at the lower end of the first shell 41 and the discharge pipe 8, and the rotating shaft 9 is inserted in the base 3 and rotates relative to the base 3; a discharge pipe 45 is vertically communicated below the higher side of the first shell 41;

referring to fig. 1 and 4: the small arm 5 comprises a second shell 51, a sand mixing blade 54 and a second motor 55, and the second shell 51 is isolated into a second accommodating cavity 52 and a sand mixing cavity 53; the second accommodating cavity 52 is positioned on one side of the second shell 51 facing the first shell 41, the second motor 55 is fixed on the side, and an output shaft of the second motor 55 extends into the second accommodating cavity 52; the sand mixing blade 54 is rotatably connected in the sand mixing cavity 53, and a sand mixing shaft of the sand mixing blade 54 extends into the accommodating cavity II 52 and is coaxially fixed with an output shaft of the motor II 55; the upper end of the sand mixing cavity 53 is communicated with a feeding pipe 56 which is coaxially arranged with the discharging pipe 45, and the feeding pipe 56 is communicated with the discharging pipe 45 and is rotatably connected with the discharging pipe 45; a discharging pipe 57 is communicated with the lower part of the other side of the sand mixing cavity 53. Referring to fig. 2 and 4: wherein, the first motor 44 and the second motor 55 are respectively communicated with an external power supply through electric wires, when the electric motor is powered on, the raw materials fall into the feeding cavity 46 from the sand storage bin 2 (refer to fig. 1), the first motor 44 drives the spiral conveying blade 43 to rotate, the raw materials are conveyed into the sand mixing cavity 53 of the second shell 51, the second motor 55 drives the sand mixing blade 54 to stir and mix the raw materials, and the mixed mold sand falls into a corresponding mold from the discharging pipe 57.

Referring to fig. 2 and 3, a first driving wheel 10 is coaxially fixed on the rotating shaft 9, a third driving wheel 11 is correspondingly and rotatably connected on the base 3, a first driving belt 12 is wound on the first driving wheel 10 and the third driving wheel 11, and the ratio of the outer diameters of the third driving wheel 11 and the first driving wheel 10 is 1: 4. A first gear 13 is coaxially fixed on the third driving wheel 11, a second gear 14 and a third gear 15 are rotatably connected to the base 3, a gap is reserved between the first gear 13 and the second gear 14, and the first gear 13 and the second gear 14 are simultaneously meshed through the third gear 15, so that the second gear 14 drives the first gear 13 to rotate. A first worm 16 is coaxially fixed on an output shaft of the first motor 44, a first worm wheel 17 meshed with the first worm 16 is rotatably connected in the first accommodating cavity 42, a first rotating shaft 18 is coaxially fixed on the first worm wheel 17, and a first helical gear 20 is coaxially fixed at the lower end of the first rotating shaft 18; the second gear 14 is coaxially fixed with a second rotating shaft 19, and the upper end of the second rotating shaft 19 is coaxially fixed with a second helical gear 21 meshed with the first helical gear 20. The machine base 3 is also provided with a driving piece I6 for driving the gear III 15 to linearly move relative to the gear II 14. When the third gear 15 simultaneously engages with the first gear 13 and the second gear 14, and the first motor 44 is started, the third driving wheel 11 is driven to drive the first driving wheel 10 to rotate, so as to drive the first casing 41 to rotate circumferentially.

A first displacement shaft 22 is coaxially fixed on the gear III 15, and a first driving piece 6 comprises a sliding groove 62, a first screw rod 61 and a first hand wheel 63; the sliding groove 62 is formed in the base 3 and is formed along the radial direction of the first displacement shaft 22, the lower end of the first displacement shaft 22 is inserted into the sliding groove 62, and the diameter of the first displacement shaft 22 is equal to the width of the sliding groove 62; the first screw rod 61 is arranged in parallel with the length direction of the sliding groove 62 and is rotatably connected to two side walls of the sliding groove 62, and meanwhile, the first screw rod 61 penetrates through the first displacement shaft 22 and is in threaded fit with the first displacement shaft 22; one end of the first screw rod 61 extends out of the machine base 3, and the first hand wheel 63 and one end of the first screw rod 61, which is positioned outside the machine base 3, are coaxially fixed. The first screw rod 61 rotates to drive the first displacement shaft 22 to drive the third gear 15 to linearly reciprocate along the sliding groove 62, so that the third gear 15 is simultaneously meshed with the second gear 14 and the first gear 13 or is far away from the second gear 14.

Referring to fig. 4 and 5, a limiting ring 33 is fixed at the lower end of the discharge pipe 45, and a ring of annular grooves are formed in the limiting ring 33; the upper end of the feeding pipe 56 extends into the annular groove, a second driving wheel 23 inserted into the annular groove is fixed, the second driving wheel 23 and the section of the feeding pipe 56 are arranged in an inverted T shape, so that the feeding pipe 56 and the discharging pipe 45 can only rotate in the circumferential direction, and the axes cannot be separated.

Wherein, the second shell 51 is also rotatably connected with a fourth transmission wheel 24, a second transmission belt 25 is wound around the outer sides of the second transmission wheel 23 and the fourth transmission wheel 24 to realize the synchronous rotation of the second transmission wheel 23 and the fourth transmission wheel 24, and the external diameter ratio of the fourth transmission wheel 24 to the second transmission wheel 23 is 1: 4. A gear six 26 is coaxially fixed on the driving wheel four 24; the second shell 51 is also rotatably connected with a seventh gear 27 and an eighth gear 28, a space is reserved between the sixth gear 26 and the seventh gear 27, and the seventh gear 27 drives the sixth gear 26 to rotate by simultaneously engaging the sixth gear 26 and the seventh gear 27 through the eighth gear 28. A second worm 29 is coaxially fixed on an output shaft of the second motor 55, a second worm wheel 30 meshed with the second worm 29 is rotatably connected in the first accommodating cavity 42, a third rotating shaft 31 is coaxially fixed on the second worm wheel 30, and the lower end of the third rotating shaft 31 is coaxially fixed with a seventh gear 27. The second housing 51 is further provided with a first driving member 6 for driving the gear eight 28 to linearly displace relative to the gear seven 27. When the gear eight 28 simultaneously engages with the gear six 26 and the gear seven 27, and the motor two 55 is started, the driving wheel four 24 is driven to drive the driving wheel two 23 to rotate, so that the housing two 51 is driven to rotate circumferentially.

A second displacement shaft 32 is coaxially fixed on the eighth gear 28, and a second driving piece 7 comprises a second screw rod 71 and a third hand wheel 614; the lower end of the second displacement shaft 32 abuts against the second shell 51; the second shell 51 is provided with two support seats, the second screw rod 71 is radially arranged along the second displacement shaft 32, two ends of the second screw rod 71 are respectively connected to the two support seats through bearings in a rotating mode, and meanwhile the second screw rod 71 penetrates through the second displacement shaft 32 and is in threaded fit with the second displacement shaft 32; one end of the second screw rod 71 extends out of the second shell 51, and the third hand wheel 614 and one end of the second screw rod 71, which is located outside the second shell 51, are coaxially fixed. The second screw rod 71 rotates to drive the second displacement shaft 32 to drive the eight gear 28 to linearly reciprocate, so that the eight gear 28 is simultaneously meshed with the six gear 26 and the seven gear 27, or is far away from the six gear 26.

The implementation principle of the embodiment is as follows: when the large arm 4 needs to rotate circumferentially, a worker manually drives the screw rod I61 to rotate, drives the displacement shaft I22 to drive the gear III 15 to be meshed with the gear I13 and the gear II 14, then the motor I44 is started to drive the worm I16 and the worm wheel I17 to rotate, and further drives the rotating shaft II 19 and the gear II 14 to rotate under the meshing action of the helical gear I20 and the helical gear II 21, so that the driving wheel III 11 is driven to drive the driving wheel I10 to rotate, and the circumferential rotation of the large arm 4 is realized; when the screw conveying blade 43 rotates to a proper position, the gear III 15 is manually driven to be far away from the gear II 14, and the motor I44 continues to work normally to drive the screw conveying blade 43 to convey the raw materials;

when the forearm 5 needs to rotate circumferentially, a worker manually drives the screw rod II 71 to rotate, drives the displacement shaft II 32 to drive the gear III 15 to be simultaneously meshed with the gear VI 26 and the gear VII 27, then the motor II 55 is started to drive the worm II 29 and the worm wheel II 30 to rotate, and drives the rotating shaft III 31 to drive the gear VII 27 to rotate, so that the driving wheel IV 24 is driven to drive the driving wheel II 23 to rotate, and the circumferential rotation of the forearm 5 is realized; when the rotating shaft rotates to a proper position, the gear eight 28 is manually driven to be away from the gear seven 27, the motor two 55 continues to work normally, and the sand mulling blade 54 is driven to perform mulling on the raw materials.

Example 2: the difference from the embodiment 1 is that, referring to fig. 6 and 7, the lower end of the first displacement shaft 22 abuts against the upper end of the machine base 3; the driving piece I6 comprises a mounting seat I64 and a sliding rod I66; the first mounting seat 64 is fixed on the base 3, a first sliding groove 65 is radially formed in the first mounting seat 64 along the first displacement shaft 22, the first sliding rod 66 is inserted into the first sliding groove 65 and can only linearly displace along the first sliding groove 65, and one end of the first sliding rod is welded and fixed with the side wall of the first displacement shaft 22; a first displacement block 67 is further fixed on one side, located in the first sliding groove 65, of the first sliding rod 66, the section of the first displacement block 67 is in an isosceles trapezoid shape, and the lower bottom of the isosceles trapezoid is fixed with the first sliding rod 66; a first displacement groove 617 which is communicated with the first sliding groove 65 and is used for linear displacement of the first displacement block 67 is formed in the first mounting seat 64; a first driving block 68 and a second driving block 69 are respectively arranged on two sides of the first displacement block 67 in the first displacement slot 617, and the first driving block 68 and the second driving block 69 are abutted to two waists of the first displacement block 67 at the moment; a first screw 610, a second screw 611, a first guide rod 612 and a second guide rod 613 are also arranged in the first displacement groove 617 in parallel along the width direction of the first sliding rod 66; the first screw 610 and the first guide rod 612 penetrate through the first driving block 68, the first screw 610 is in threaded fit with the first driving block 68, the second screw 611 and the second guide rod 613 penetrate through the second driving block 69, and the second screw 611 is in threaded fit with the second driving block 69; the first screw 610 and the second screw 611 are rotatably connected to the first mounting seat 64, and the first guide rod 612 and the second guide rod 613 are fixed to the mounting seat.

A gear four 615 and a gear five 616 are coaxially fixed on the screw rod one 610 and the screw rod two 611 respectively, the gear four 615 and the gear five 616 are meshed with each other, and the external diameter ratio is equal to the size; one end of the first screw 610 extends out of the first mounting seat 64, and a second hand wheel 72 is coaxially fixed at one end of the first screw outside the first mounting seat 64.

Referring to fig. 8 and 9, the second driving member 7 includes a second mounting seat 73 and a second sliding rod 75; the second mounting seat 73 is fixed on the second housing 51, a second sliding groove 74 is radially formed in the second mounting seat 73 along the second displacement shaft 32, the second sliding rod 75 is inserted into the second sliding groove 74 and can only linearly displace along the second sliding groove 74, and one end of the second sliding rod is welded and fixed with the side wall of the second displacement shaft 32; a second displacement block 76 is further fixed on one side of the second sliding rod 75, which is positioned in the second sliding groove 74, the section of the second displacement block 76 is in an isosceles trapezoid shape, and the lower bottom of the isosceles trapezoid is fixed with the second sliding rod 75; a second displacement groove 716 which is communicated with the second sliding groove 74 and is used for the linear displacement of the second displacement block 76 is formed in the second mounting seat 73; a third driving block 77 and a fourth driving block 78 are respectively arranged on two sides of the second displacement block 76 in the second displacement slot 716, and the third driving block 77 and the fourth driving block 78 are abutted against two waists of the second displacement block 76 at any moment; a screw rod III 79, a screw rod IV 710, a guide rod III 711 and a guide rod IV 712 are arranged in the displacement groove II 716 in parallel along the width direction of the sliding rod II 75; the third screw rod 79 and the third guide rod 711 both penetrate through the third driving block 77, the third screw rod 79 is in threaded fit with the third driving block 77, the fourth screw rod 710 and the fourth guide rod 712 both penetrate through the fourth driving block 78, and the fourth screw rod 710 is in threaded fit with the fourth driving block 78; the third screw 79 and the fourth screw 710 are rotatably connected in the second mounting seat 73, and the third guide rod 711 and the fourth guide rod 712 are fixed in the mounting seat.

A gear nine 714 and a gear ten 715 are respectively and coaxially fixed on the screw three 79 and the screw four 710, the gear nine 714 and the gear ten 715 are mutually meshed, and the external diameter ratio is equal in size; one end of the third screw rod 79 extends out of the second mounting seat 73, and a fourth hand wheel 713 is coaxially fixed at one end of the second screw rod outside the second mounting seat 73.

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

Claims

1. A sand mixer for a molding sand production line comprises a rack (1), a sand storage bin (2) arranged on the rack (1), a base (3) arranged below the sand storage bin (2), a large arm (4) which is obliquely arranged along a vertical plane and is rotatably connected to the base (3) and is communicated with a discharge hole of the sand storage bin (2) at the lower side, and a small arm (5) which is horizontally arranged below the higher side of the large arm (4) and is rotatably connected with the large arm (4); the large arm (4) comprises a first shell (41), a spiral conveying blade (43) which is rotatably connected in the first shell (41), and a first motor (44) which is arranged on the lower side of the first shell (41) and drives the spiral conveying blade (43) to rotate; the small arm (5) comprises a second shell (51), a sand mixing blade (54) rotatably connected in the second shell (51), and a second motor (55) which is arranged on one side of the second shell (51) facing the first shell (41) and drives the sand mixing blade (54) to rotate; the method is characterized in that: a rotating shaft (9) which is coaxial with a discharge hole of the sand storage bin (2) is fixed below the second shell (51), the rotating shaft (9) is connected to the base (3) in an inserting and rotating mode, a first driving wheel (10) is coaxially fixed on the rotating shaft (9), the first driving wheel (10) is connected with a first gear (13), the base (3) is rotatably connected with a second gear (14) and a third gear (15) which is meshed with the first gear (13) and the second gear (14) at the same time, a first worm (16) is fixed on an output shaft of the first motor (44), the first worm (16) is meshed with a first worm wheel (17), a first rotating shaft (18) is fixed on the first worm wheel (17), and a second rotating shaft (19) which is connected with the first rotating shaft (18) is arranged on the second gear (14); the machine base (3) is also provided with a driving piece I (6) for driving the gear III (15) to do linear displacement motion; the lower end of the higher side of the first shell (41) is vertically provided with a discharge pipe (45), the upper end of the second shell (51) is vertically communicated with a feed pipe (56) which is coaxially arranged with the discharge pipe (45), the lower end of the discharge pipe (45) is provided with a limit ring (33), an annular groove is formed in the limit ring (33), the upper end of the discharge pipe (45) is fixedly provided with a second transmission wheel (23) which can only be connected in the annular groove in a circumferential rotating manner, the second shell (51) is also rotatably connected with a sixth gear (26), a seventh gear (27) and an eighth gear (28), the sixth gear (26) drives the second transmission wheel (23) to rotate, and the eighth gear (28) is positioned between the sixth gear (26) and the seventh gear (27) and is simultaneously meshed with the sixth gear (26) and the seventh gear; a second worm (29) is coaxially fixed on an output shaft of the second motor (55), a second worm wheel (30) is meshed with the second worm (29), and the second worm wheel (30) and a seventh gear (27) are coaxially arranged and are communicated into a whole through a third rotating shaft (31); and a second driving piece (7) for driving the gear eight (28) to linearly displace is further arranged on the second shell (51).

2. A sand mixer for a foundry production line according to claim 1, characterized in that: three (15) coaxial fixings of gear have displacement axle (22), driving piece (6) are including offering on frame (3) and supplying displacement axle (22) gliding spout (62), rotate and connect in spout (62) and pass displacement axle (22) and with displacement axle (22) screw-thread fit's lead screw one (61), lead screw one (61) end extends outside frame (3), and is in the outer one end of frame (3) and is fixed with hand wheel (63).

3. A sand mixer for a foundry production line according to claim 1, characterized in that: the gear III (15) is coaxially fixed with a first displacement shaft (22), the first driving part (6) comprises a first mounting seat (64), a first sliding groove (65) arranged in the first mounting seat (64) and a first sliding rod (66) inserted in the first sliding groove (65), one end of the first sliding rod (66) is fixed with the side wall of the first displacement shaft (22), the side wall of the first sliding rod (66) in the first mounting seat (64) is fixed with a first displacement block (67), the cross section of the first displacement block (67) is in an isosceles trapezoid shape with the lower bottom fixed with the first sliding rod (66), a first displacement groove (617) for the first displacement block (67) to slide is formed in the first mounting seat (64), a first driving block (68) and a second driving block (69) are correspondingly arranged in the first displacement groove (617), and the first driving block (68) and the second driving block (69) are respectively abutted to two inclined planes of the first displacement block (67), the first screw rod (610) and the second screw rod (611) are rotatably connected in the first displacement slot (617), and the first screw rod (610) and the second screw rod (611) respectively penetrate through the first driving block (68) and the second driving block (69) and are in threaded fit with the first driving block (68) and the second driving block (69).

4. A sand mixer for a foundry production line according to claim 3, characterized in that: the screw directions of the first screw (610) and the second screw (611) are arranged in the same direction, and a gear four (615) and a gear five (616) which are meshed with each other are coaxially fixed on the first screw (610) and the second screw (611) respectively; one end of the first screw rod (610) extends out of the first mounting seat (64), and a second hand wheel (72) is arranged at one end of the first screw rod, which is positioned outside the first mounting seat (64).

5. A sand mixer for a foundry production line according to claim 1, characterized in that: a second displacement shaft (32) is coaxially fixed on the eighth gear (28), and the lower end of the second displacement shaft (32) is abutted against the upper end of the second shell (51); the driving piece II (7) comprises a screw rod II (71) and a hand wheel III (614), the screw rod II (71) is rotatably connected to the shell II (51) and penetrates through the displacement shaft II (32) and is in threaded fit with the displacement shaft II (32), and the hand wheel III (614) is coaxially fixed with one end of the screw rod II (71).

6. A sand mixer for a foundry production line according to claim 1, characterized in that: the eight (28) gear is coaxially fixed with a second displacement shaft (32), the second driving element (7) comprises a second mounting seat (73), a second sliding groove (74) arranged in the second mounting seat (73), and a second sliding rod (75) inserted in the second sliding groove (74), one end of the second sliding rod (75) is fixed with the side wall of the second displacement shaft (32), the side wall of the second sliding rod (75) in the second mounting seat (73) is fixed with a second displacement block (76), the cross section of the second displacement block (76) is in an isosceles trapezoid shape with the lower bottom fixed with the second sliding rod (75), a second displacement groove (716) for the second displacement block (76) to slide is formed in the second mounting seat (73), a third driving block (77) and a fourth driving block (78) are correspondingly arranged in the second displacement groove (716), and the third driving block (77) and the fourth driving block (78) are respectively abutted against two waist inclined surfaces of the second displacement block (76), and a third screw rod (79) and a fourth screw rod (710) are further rotatably connected in the second displacement slot (716), and the third screw rod (79) and the fourth screw rod (710) respectively penetrate through the third driving block (77) and the fourth driving block (78) and are in threaded fit with the third driving block (77) and the fourth driving block (78).

7. A sand mixer for a foundry production line according to claim 6, characterized in that: the thread directions of the third screw (79) and the fourth screw (710) are arranged in the same direction, and a gear nine (714) and a gear ten (715) which are meshed with each other are coaxially fixed on the third screw (79) and the fourth screw (710) respectively; one end of the screw rod III (79) extends out of the mounting seat II (73), and a hand wheel IV (713) is arranged at one end of the screw rod III, which is positioned out of the mounting seat II (73).

8. A sand mixer for a foundry production line according to claim 1, characterized in that: the feeding cavity (46) and the containing cavity (42) are respectively used for placing the spiral conveying blade (43), the worm wheel I (17) and the worm rod I (16) in the shell I (41), and one end of a conveying shaft of the spiral conveying blade (43) extends into the containing cavity I (42) and is coaxially connected with an output shaft of the motor I (44).

9. A sand mixer for a foundry production line according to claim 1, characterized in that: the second shell (51) is internally divided into a sand mixing cavity (53) and a containing cavity (52) which are used for containing a sand mixing blade (54), a worm gear (30) and a worm (29) respectively, and one end of a sand mixing shaft of the sand mixing blade (54) extends into the containing cavity (52) and is coaxially connected with an output shaft of the motor (55).