CN211217552U - Casting mechanism - Google Patents

Abstract

The utility model provides a throw mechanism belongs to mechanical technical field. The throwing mechanism comprises a throwing barrel, a driving motor, a power supply, an armature post and an impact head, wherein the driving motor is fixedly arranged at the rear end of the throwing barrel, an electrified coil is wound on the armature post, the armature post is fixed in the throwing barrel, the impact head is slidably connected with the front end of the throwing barrel, the front end of the throwing barrel is opened, the impact head is connected with the armature post through a reset spring, an output shaft of the driving motor is rotatably connected in the armature post, a first combination disc is fixedly arranged on the output shaft of the driving motor, a second combination disc parallel to the first combination disc is fixedly arranged at the rear end of the armature post, a permanent magnet strip with the magnetic pole direction coincident with the axis of the throwing barrel is arranged in the impact head, and the driving motor is electrically connected with the power supply; the throwing barrel is provided with a feeding port, and the feeding port can be blocked when the impact head moves to the limit position close to one end of the opening of the throwing barrel. The utility model has the advantages of simple structure, high casting precision and the like.

Description

Casting mechanism

Technical Field

The utility model belongs to the technical field of machinery, a throw mechanism is related to.

Background

The walnut toy has good walnut playing value, the similarity of the walnut toy sold in pairs is very important, in addition, the walnut toy is good and not good, the walnut toy has bone, good bone quality and enough oiliness, the cortex density of the walnut toy is not wrong, the walnut toy can be looked better, the walnut toy has the walnut playing value, the walnut toy is very light, the walnut toy does not play hands, the walnut toy does not have mature characters, the walnut has insufficient oiliness, the density is not large, and the plate value is not high.

In the paired walnut sorting process, after the walnuts are sorted, walnuts with similar densities are selected from walnuts with equivalent sizes, manufacturers and purchasing manufacturers of the funny walnuts need to classify the walnuts well, and then the walnuts with equivalent sizes and densities are priced so as to be convenient for sale.

The existing mode is manual operation, which not only easily causes different judgment standards for sorting, but also easily causes the problems of incomplete processing or excessive processing in the process of processing the sorted walnuts, particularly in the process of mechanical grinding and polishing, and moreover, the manual sorting cost is high, the difficulty is high, and the sorting and pricing are not easy.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a throw mechanism to the above-mentioned problem that prior art exists, the utility model discloses the technical problem that will solve is how to throw precision, simple structure.

The purpose of the utility model can be realized by the following technical proposal: a throwing mechanism is characterized by comprising a throwing barrel, a driving motor, a power supply, an armature post and a striking head, wherein the driving motor is fixedly arranged at the rear end of the throwing barrel, an energizing coil is wound on the armature post, the armature post is fixedly arranged in the throwing barrel, the striking head is slidably connected with the front end of the throwing barrel, the front end of the throwing barrel is provided with an opening, the striking head is connected with the armature post through a reset spring, an output shaft of the driving motor is rotatably connected in the armature post, an output shaft of the driving motor is fixedly provided with a first combination disk, the rear end of the armature post is fixedly provided with a second combination disk parallel to the first combination disk, a permanent magnet strip with the magnetic pole direction coincident with the axis of the throwing barrel is arranged in the striking head, the second combination disk is provided with two arc-shaped contact strips, and the two contact strips are circumferentially and uniformly distributed on the second combination disk, the two ends of the electrified coil are respectively and electrically connected with two contact strips, the two contact strips have the same radius, the first combination disc is provided with two contacts which are symmetrically distributed, the two contacts can respectively abut against the two contact strips, the two contacts are respectively connected with the positive electrode and the negative electrode of a power supply, and the driving motor is electrically connected with the power supply; the ejection barrel is provided with a feeding opening, and the feeding opening can be blocked when the impact head moves to a limit position close to one end of the opening of the ejection barrel.

The driving motor is a micro motor and only needs to drive the first combination disk, the driving force and the noise are relatively small, the driving motor is used for driving the first combination disk and the second combination disk to move relatively, the energizing direction of the energized coil is intermittently adjusted due to the switching of a contact spring and a contact in the relative movement process of the first combination disk and the second combination disk, when an armature post is close to one end of the impact head and is opposite to one end of a permanent magnet strip in the impact head, the impact head receives the adsorption force in the direction of the armature post and compresses a reset spring to enable the impact head to vacate a blanking section of a feed inlet, walnuts enter the throwing barrel, after the current direction of the energized coil is switched, one end of the armature post close to the impact head is the same pole as one end of the permanent magnet strip in the impact head, the impact head receives the repulsive force given by the armature post and the restoring force of the reset spring to enable the impact head to move towards the opening direction of the throwing barrel, the walnuts in the throwing cylinder are driven to be thrown out of the throwing cylinder.

The rotating speed of the driving motor is controlled, so that the time for the impact head to vacate the blanking section of the feeding port is proper, only one walnut entering the throwing cylinder at a time can be enabled or not enter the throwing cylinder, in principle, the walnut cannot enter the throwing cylinder normally with a certain probability, and a plurality of walnuts entering at a time can not be enabled, so that the corresponding relation between the throwing distance and the quality of the walnuts is ensured in the throwing process.

The impact head is pulled up and driven by switching the current direction of the electrified coil, and in the pulling up process, the pulling force applied to the impact head is changed from small to large, and the impact head cannot be contacted with the armature post under the action of the reset spring, so that the impact force on the walnut when the armature post is contacted with the impact head is avoided, and when the impact head slides to the opening direction of the ejection cylinder instantly, a gap is formed between the walnut and the impact head, thereby influencing the ejection distance and the sorting precision; in the process that the impact head is far away from the armature column, the driving force received by the impact head is reduced from large to small, and the characteristic that the pulling force is reduced from small to large when the impact head is close to the armature column is matched, so that the intensity of throwing out the walnut carried by the impact head is higher, and the wear of the impact head on the walnut is smaller.

The whole casting mechanism is very simple in structure, the control mode is also very simple, the whole size is small, a plurality of casting mechanisms work simultaneously, and the sorting efficiency is greatly improved.

In the above-mentioned ejection mechanism, an annular step is provided at an end of the impact headrest near the armature post, and an end of the return spring near the impact head is connected to the annular step.

The setting of annular step can be when keeping the longer deformation length of reset spring, can reduce armature post and impact head's minimum distance, makes the drive power of throwing out the walnut can not weaken.

In the above-mentioned ejection mechanism, a sheath is provided at an end of the impact head near the opening of the ejection barrel, the outer contour of the sheath is adapted to the inner cavity of the ejection barrel, and a notch is provided on the sheath and can be aligned with the feeding port; the impact head is fixedly provided with a guide rod inserted in the jack, the guide rod is provided with a protrusion, the inner wall of the jack is provided with a thread groove, and the rotation angle of the impact head is 80-120 degrees in the process that the protrusion moves from one end of the thread groove to the other end of the thread groove.

In the process that the impact head moves in the casting cylinder, the opening section of the feed opening changes, if the impact head only moves linearly, the walnut is clamped between the impact head and the feed opening, in order to avoid the problem, the feeding precision is improved, the impact head is enabled to carry out rotary motion with a certain angle while moving linearly through the matching of the thread groove and the bulge, so that when the impact head opens the feed opening and closes the feed opening, the walnut can be driven due to the rotation of the impact head, the entering walnut can enter the sheath more smoothly due to the rotation of the impact head, the walnut possibly blocked by the impact head can be prevented, the walnut can be driven to leave the motion path of the impact head due to the rotation of the impact head, on the one hand, the walnut is protected, and on the other hand, the feeding precision can be improved.

The existence of sheath can avoid in dust and impurity get into the gap between impact head and the section of thick bamboo that casts, moreover, can avoid the slip in-process of impact head, the operational resistance that impact head and the section of thick bamboo relative motion led to the fact the walnut makes the walnut not receive wearing and tearing, and the contact site of walnut and impact head is also relatively stable when throwing out.

In the throwing mechanism, a feeding hopper is arranged at a feeding port of each throwing barrel, and an opening of the feeding hopper is positioned below the corresponding blanking plate.

In the ejection mechanism, one end of the ejection cylinder, which is provided with the opening, faces upwards, and an inclination angle of 5-30 degrees is formed between the axis of the ejection cylinder and the horizontal plane.

The throwing cylinders are distributed in an inclined angle, so that the walnut is kept in contact with the end part of the impact head in the process of returning the impact head, when the impact head drives the walnut to be thrown, the acting force on the walnut is more direct, the actions of all throwing mechanisms are more uniform, and the sorting precision is improved.

In one of the above-described ejection mechanisms, the axes of the respective ejection cylinders are in the same plane.

In the selection process, variables are reduced as much as possible, the density of walnuts can be directly judged according to the casting distance, all casting cylinders are located in the same plane, and the casting distance can be more directly related to the density of the walnuts.

In the above-mentioned ejection mechanism, an adjusting sleeve is inserted into the sheath, and the adjusting sleeve has a feeding port corresponding to the notch.

The specification of each throwing mechanism is unified, however, after the walnuts with different sizes enter, the contact positions of the walnuts with different sizes and the impacting head are different, and the accurate: the distance between the contact position of the walnut and the impact head with different sizes and the axis of the impact head is different, the throwing impact force can be influenced, the throwing distance and the throwing path can be influenced, and in order to eliminate the condition, the adjusting sleeves with different thicknesses are rotated aiming at the throwing mechanisms corresponding to the walnuts with different sizes so as to adjust the contact position of the walnut and the impact head to be positioned at the axis position of the impact head.

In the above-mentioned ejection mechanism, a plurality of material receiving boxes are arranged in front of each ejection barrel, and the material receiving boxes corresponding to the same ejection barrel are positioned on the same straight line.

The walnut thrown by the receiving boxes at different positions is received to classify and package the walnut, and the bottom of the receiving box is provided with soft materials such as fine sand, so that the walnut is prevented from popping up after entering and is protected.

Drawings

Fig. 1 is a schematic view of the overall structure of the screening apparatus.

Figure 2 is a schematic view of the construction of the ejection mechanism.

Fig. 3 is a schematic view of the size selecting mechanism.

Fig. 4 is a schematic structural view of the first bonding pad and the second bonding pad.

In the figure, 11, a frame; 12. a conveyor belt; 121. a limiting strip; 122. a leak hole; 13. a drive roller; 14. a driven roller; 15. a support block; 16. a roller; 17. a blanking plate; 18. a baffle plate; 181. a stirring rod; 19. a blocking plate; 21. a projectile barrel; 211. a feeding port; 212. an annular step; 213. a sheath; 22. a drive motor; 23. an armature post; 231. a jack; 232. a guide bar; 233. a protrusion; 234. a thread groove; 24. a striking head; 241. a permanent magnet strip; 25. an electrified coil; 26. a return spring; 27. a first combination disc; 271. a contact; 28. a second combination disc; 281. a contact bar; 3. feeding into a hopper; 4. and (4) adjusting the sleeve.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in fig. 1 and 3, the sorting device comprises a frame 11, a filtering mechanism arranged on the frame 11, the filtering mechanism comprises a plurality of conveyer belts 12, each conveyer belt 12 is superposed from top to bottom, and the sorting device is characterized in that: the turning-back radius of each conveyor belt 12 is reduced from outside to inside in sequence, and the conveyor belt 12 with smaller turning-back radius is wrapped by the conveyor belt 12 with larger turning-back radius;

one end of each conveying belt 12 is respectively drawn by a driving roller 13, the other end of the conveying belt 12 positioned at the innermost side is drawn by a driven roller 14, gaps between the adjacent conveying belts 12 at one end of the driven roller 14 are supported by a plurality of supporting blocks 15 fixed on a bracket, and the outer side and the inner side of each supporting block 15 are respectively and rotatably connected with a roller 16;

the conveyer belt 12 is provided with a plurality of leak holes 122, and the diameters of the leak holes 122 on the conveyer belt 12 are sequentially reduced from outside to inside;

each conveying belt 12 is correspondingly provided with a blanking plate 17 fixed on the frame 11, the blanking plate 17 of the innermost conveying belt 12 is positioned between the channel roller and the driven roller 14, and the blanking plates 17 of the other layers of conveying belts 12 are positioned between the driving roller 13 of the conveying belt 12 and the driving roller 13 of the inner conveying belt 12; the tail end of the outermost conveying belt 12 is also provided with a blanking plate 17, so that the blanking plates 17 are positioned in the same plane and are distributed at intervals in sequence from large to small according to the filtering diameter;

the two sides of each conveying belt 12 are provided with a baffle 18 fixed on the frame 11; except the blanking plate 17 corresponding to the conveying belt 12 positioned at the innermost side, a blocking plate 19 is arranged above each blanking plate 17, the blocking plate 19 is fixed on the frame 11, and the blocking plate 19 is close to the lower surface of the conveying belt 12 above the blocking plate 19; a plurality of stirring rods 181 are connected between the two baffles 18 on the two sides of the same conveying belt 12;

the frame 11 is provided with ejection mechanisms corresponding to the blanking plates 17 one by one.

The steps for sorting walnuts with different sizes are as follows:

the first step is as follows: walnut which is peeled and cleaned is slowly put in from the outermost layer of the conveyer belt 12 and is put in from one end of the outermost layer close to the driving roller 13, each conveyer belt 12 runs for a period of time towards the direction far away from the driving roller 13, so that the outermost layer of the conveyer belt 12 drives the walnut which cannot be filtered through the filtering hole on the conveyer belt 12 to fall onto the next layer of the conveyer belt 12, and the walnut which cannot be filtered through the corresponding conveyer belt 12 or cannot be filtered through the corresponding conveyer belt 12 due to stacking is positioned on one side, far away from the driving roller 13, of the conveyer belt 12 under the limiting action of the baffle 18 and the supporting block 15;

the second step is that: stopping feeding, namely, sequentially reversely running each layer of the conveyer belts 12 except the outermost layer of the conveyer belt 12 from inside to outside, and keeping the initial running direction of other conveyer belts 12 when one conveyer belt 12 reversely runs;

the third step: after the second step, the conveying belts 12 on the inner side of the conveying belt 12 which runs reversely for the last time sequentially run reversely from outside to inside, and when one conveying belt 12 runs reversely, other conveying belts 12 keep the initial running direction; according to the control rule of the third step, the reverse running times of the inner layer conveying belt 12 in any two adjacent conveying belts 12 are increased by one time compared with the reverse running times of the outer layer conveying belt 12 adjacent to the inner layer conveying belt;

the fourth step: and repeating the first step to the third step to finish the sorting process of the walnuts according to the sizes.

The above steps describe the process based on the situation that the number of layers of the conveyer belt 12 is large, taking three layers as an example: first, blanking is carried out to the outermost layer, each conveying belt 12 runs for a period of time in the direction far away from the driving roller 13, the running direction is called as forward running, otherwise, the reverse running is carried out, when stacking conditions exist on each conveying belt 12, blanking is suspended, the third layer runs for a period of time in the reverse direction, in the process, the outermost layer and the middle layer run in the forward direction, after walnuts on the third layer are all separated from the conveying belts 12, the second layer runs for a period of time in the reverse direction, the first layer and the third layer run in the forward direction, after no stacked walnuts exist on the second layer, the innermost layer runs in the reverse direction, and similarly, other layers run in the forward direction.

Although the steps are relatively complicated, precise sorting can be realized by matching with the initial feeding amount through program control, and the specific sorting principle is as follows:

in the process that all the conveying belts 12 are operated in the forward direction, walnuts which cannot be filtered through corresponding filter holes are stacked between the adjacent conveying belts 12 far away from one side of the driving roller 13 under the action of the supporting blocks 15 and the baffle plates 18, the walnuts which cannot be filtered through the filter holes enter the corresponding blanking plates 17 due to the longer length of the outermost conveying belt 12, when the innermost layer is operated in the reverse direction, the stirring rods 181 drive the stacked walnuts to be dispersed, so that the walnuts are tiled again, the walnuts which can pass through the filter holes enter the corresponding blanking plates 17 of the inner conveying belt 12, the walnuts which cannot be filtered enter the corresponding blanking plates 17 of the upper conveying belt 12, the secondary inner layer is operated in the reverse direction, the walnuts which are filtered through the secondary inner conveying belt 12 enter the innermost conveying belt 12 again, and the innermost conveying belt 12 needs to be selected in the reverse direction again, therefore, the third step of the above steps, and (3) feeding again until no walnuts exist on all the conveying belts 12, and repeating the steps to accurately select all the walnuts.

The whole structure is very simple and small in size, and the conveyer belts 12 are stacked with the blanking plates 17 inside.

The conveyer belt 12 can be horizontal, also can make one side of drive roller 13 decline certain angle, and the setting of supporting shoe 15 can ensure that the walnut can not be inserted between the adjacent conveyer belt 12 of being close to driven roller 14 one end.

After the contracts of different diameters are sorted and classified, the contracts enter the corresponding ejection mechanisms from the respective blanking plates 17, the ejection mechanisms can be of the existing structures, for example, the barrel with the opening facing upwards and forwards is connected with a sliding plate in the barrel, the sliding plate is connected with a spring at the bottom of the barrel, the spring can be compressed after the walnut falls in, and the walnut is ejected out of the barrel under the action of the restoring force of the spring.

Further, the conveyor belt 12 is made of transparent soft plastic.

The conveyer belt 12 of transparent material can the operation personnel respectively observe the state of walnut on conveyer belt 12 to in good time adjustment conveyer belt 12's operating parameter.

The lateral surface of the conveying belt 12 is provided with a plurality of limiting strips 121, and the limiting strips 121 are arranged along the running direction of the conveying belt 12. Spacing strip 121 can make the walnut remove according to the orbit in the in-process that rolls and is driven in reverse, improves and filters out efficiency, reduces the filtration pore because of the jam that a plurality of walnuts share the filtration pore cross-section and cause.

One end of the blanking plate 17 inclines to one side vertical to the running direction of the conveying belt 12, so that an inclination angle of less than 20 degrees is formed between the plane of the blanking plate 17 and the plane of the conveying belt 12.

As shown in fig. 2 and 4, the ejection mechanism comprises a ejection barrel 21, a driving motor 22, a power supply, an armature column 23 and an impact head 24, the driving motor 22 is fixedly arranged at the rear end of the ejection barrel 21, an energizing coil 25 is wound on the armature column 23, the armature column 23 is fixed in the ejection barrel 21, the impact head 24 is slidably connected at the front end of the ejection barrel 21, the front end of the ejection barrel 21 is open, the impact head 24 is connected with the armature column 23 through a return spring 26, an output shaft of the driving motor 22 is rotatably connected in the armature column 23, a first bonding disk 27 is fixedly arranged on the output shaft of the driving motor 22, a second bonding disk 28 parallel to the first bonding disk 27 is fixedly arranged at the rear end of the armature column 23, a permanent magnet strip 241 with the magnetic pole direction coincident with the axis of the ejection barrel 21 is arranged in the impact head 24, two arc-shaped contact strips 281 are arranged on the second bonding disk 28, the two contact strips 281 are uniformly distributed on the second bonding disk 28 in the circumferential direction, the two ends of the energizing coil 25 are respectively and electrically connected with the two contact strips 281, the radiuses of the two contact strips 281 are the same, the combination disc I27 is provided with two contacts 271 which are symmetrically distributed, the two contacts 271 can respectively abut against the two contact strips 281, the two contacts 271 are respectively connected with the positive pole and the negative pole of the power supply, and the driving motor 22 is electrically connected with the power supply; the throwing barrel 21 is provided with a feeding port 211, and the striking head 24 can block the feeding port 211 when moving to a limit position close to one end of the opening of the throwing barrel 21.

The driving motor 22 is a micro motor, only the first combination disk 27 needs to be driven, the driving force and noise are relatively small, the driving motor 22 is used for driving the first combination disk 27 and the second combination disk 28 to move relatively, in the process of the relative movement of the first combination disk 27 and the second combination disk 28, the energizing direction of the energized coil 25 is intermittently adjusted due to the switching of the contact spring and the contact 271, when one end of the armature column 23, which is close to the impact head 24, is opposite to one end of the permanent magnet strip 241 in the impact head 24, the impact head 24 receives the adsorption force in the direction of the armature column 23 and compresses the return spring 26, so that the impact head 24 vacates the blanking section of the feeding port 211 and enters the throwing cylinder 21, when the current direction of the energized coil 25 is switched, one end of the armature column 23, which is close to the impact head 24, is the same pole as one end of the permanent magnet strip 241 in the impact head 24, the impact head 24 receives the repulsion force given by the armature column 23 and adds the restoring force of the, the impacting head 24 moves towards the opening direction of the throwing cylinder 21 to drive the walnuts in the throwing cylinder 21 to be thrown out of the throwing cylinder 21.

The rotating speed of the driving motor 22 is controlled, so that the time for the impacting head 24 to vacate the blanking section of the feeding port 211 is proper, only one walnut entering the throwing cylinder 21 at a time can enter the walnut or not enter the walnut, in principle, the walnut cannot enter the walnut normally at a certain probability, and a plurality of walnuts entering at a time cannot enter the walnut at a time, so that the corresponding relation between the throwing distance and the quality of the walnuts is ensured in the throwing process.

The collision head 24 is pulled up and driven by switching the current direction of the electrified coil 25, in the pulling up process, the pulling force on the collision head 24 is changed from small to large, and under the action of the reset spring 26, the collision head 24 cannot be contacted with the armature post 23, so that the walnut is prevented from being impacted when the armature post 23 is contacted with the collision head 24, and when the collision head 24 slides to the opening direction of the throwing cylinder 21 instantly, a gap is formed between the walnut and the collision head 24, so that the throwing distance is influenced, and the sorting precision is influenced; in the process that the impact head 24 is far away from the armature post 23, the driving force applied to the impact head 24 is reduced from large to small, and the impact head 24 carries the walnut to throw out more strongly by matching with the characteristic that the pulling force is reduced from small to large when the impact head 24 is close to the armature post 23, and the walnut is less worn by the impact head 24.

The whole casting mechanism is very simple in structure, the control mode is also very simple, the whole size is small, a plurality of casting mechanisms work simultaneously, and the sorting efficiency is greatly improved.

The end of impact head 24 adjacent armature post 23 has an annular step 212 and the end of return spring 26 adjacent impact head 24 is attached to annular step 212. The annular step 212 is arranged, so that the minimum distance between the armature post 23 and the impact head 24 can be reduced while the longer deformation length of the return spring 26 is kept, and the driving force for throwing out the walnut cannot be weakened.

One end of the impact head 24 close to the opening of the throwing barrel 21 is provided with a sheath 213, the outline of the sheath 213 is matched with the inner cavity of the throwing barrel 21, and the sheath 213 is provided with a notch which can be aligned with the material inlet 211; an insertion hole 231 is formed in the armature post 23, a guide rod 232 inserted into the insertion hole 231 is fixedly arranged on the impact head 24, a protrusion 233 is arranged on the guide rod 232, a thread groove 234 is formed in the inner wall of the insertion hole 231, and in the process that the protrusion 233 moves from one end of the thread groove 234 to the other end, the rotation angle of the impact head 24 is 80-120 degrees.

In the process that the impact head 24 moves in the throwing cylinder 21, the opening section of the feed opening changes, if the impact head 24 only moves linearly, the walnut is clamped between the impact head 24 and the feed opening, in order to avoid the problem, the feeding precision is improved, the impact head 24 moves linearly and simultaneously carries out rotary motion at a certain angle through the matching of the thread groove 234 and the protrusion 233, so that when the impact head 24 opens and closes the feed opening, the walnut can be driven by the rotation of the impact head 24, the entering walnut can enter the sheath 213 more smoothly due to the rotation of the impact head 24, the walnut which is possibly stuck by the impact head 24 can be driven to leave the motion path of the impact head 24 due to the rotation of the impact head 24, on the one hand, the walnut is protected, and on the other hand, the feeding precision can be improved.

The existence of the sheath 213 can prevent dust and impurities from entering a gap between the impact head 24 and the ejection barrel 21, and can prevent the impact head 24 and the ejection barrel 21 from moving relatively to cause running resistance to the walnut in the sliding process of the impact head 24, so that the walnut is not abraded, and the contact part between the walnut and the impact head 24 is relatively stable in the ejection process.

The feeding inlet 211 of each throwing barrel 21 is provided with a feeding hopper 3, and the opening of the feeding hopper 3 is positioned below the corresponding blanking plate 17.

The end, provided with the opening, of the throwing cylinder 21 faces upwards, and an inclination angle of 5-30 degrees is formed between the axis of the throwing cylinder 21 and the horizontal plane. The throwing cylinders 21 are distributed in an inclined angle, so that the walnuts can be ensured to be in contact with the end parts of the striking heads 24 in the process of returning the striking heads 24, when the striking heads 24 drive the walnuts to be thrown, the acting force on the walnuts is more direct, the actions of all throwing mechanisms are more uniform, and the sorting precision is improved.

The axes of the respective shooting pots 21 are in the same plane. In the selection process, variables are reduced as much as possible, the density of walnuts can be directly judged according to the casting distance, the casting cylinders 21 are positioned in the same plane, and the casting distance can be more directly related to the density of the walnuts.

An adjusting sleeve 4 is inserted into the sheath 213, and the adjusting sleeve 4 has a feeding opening corresponding to the gap. The specifications of all throwing mechanisms are uniform, however, after walnuts with different sizes enter, the contact positions of the walnuts with different sizes and the impacting head 24 are different, and the accurate: in order to eliminate the situation, aiming at the casting mechanisms corresponding to walnuts with different sizes, adjusting sleeves 4 with different thicknesses are rotated so as to adjust the contact positions of the walnuts and the impact head 24 to be positioned at the axial line position of the impact head 24.

A plurality of material receiving boxes are arranged in front of each throwing barrel 21, and the material receiving boxes corresponding to the same throwing barrel 21 are positioned on the same straight line. The walnut thrown by the receiving boxes at different positions is received to classify and package the walnut, and the bottom of the receiving box is provided with soft materials such as fine sand, so that the walnut is prevented from popping up after entering and is protected.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims (6)

1. A throwing mechanism is characterized by comprising a throwing barrel (21), a driving motor (22), a power supply, an armature post (23) and an impact head (24), wherein the driving motor (22) is fixedly arranged at the rear end of the throwing barrel (21), an electrified coil (25) is wound on the armature post (23), the armature post (23) is fixed in the throwing barrel (21), the impact head (24) is connected to the front end of the throwing barrel (21) in a sliding manner, the front end of the throwing barrel (21) is opened, the impact head (24) is connected with the armature post (23) through a return spring (26), an output shaft of the driving motor (22) is rotatably connected in the armature post (23), a first binding disc (27) is fixedly arranged on the output shaft of the driving motor (22), a second binding disc (28) parallel to the first binding disc (27) is fixedly arranged at the rear end of the armature post (23), the impact head (24) is internally provided with a permanent magnet strip (241) of which the magnetic pole direction is coincident with the axis of the projectile barrel (21), the second combination disk (28) is provided with two arc-shaped contact strips (281), the two contact strips (281) are circumferentially and uniformly distributed on the second combination disk (28), two ends of the electrified coil (25) are respectively and electrically connected with the two contact strips (281), the radiuses of the two contact strips (281) are the same, the first combination disk (27) is provided with two contacts (271) which are symmetrically distributed, the two contacts (271) can be respectively abutted against the two contact strips (281), the two contacts (271) are respectively connected with the positive electrode and the negative electrode of a power supply, and the driving motor (22) is electrically connected with the power supply; the throwing barrel (21) is provided with a feeding port (211), and the feeding port (211) can be blocked when the impact head (24) moves to a limit position close to one end of the opening of the throwing barrel (21).

2. A projectile mechanism as claimed in claim 1, wherein said impact head (24) has an annular step (212) at the end adjacent the armature post (23), and said return spring (26) is connected to the annular step (212) at the end adjacent the impact head (24).

3. A projectile mechanism as claimed in claim 1 or 2, wherein said impact head (24) has a shield (213) at an end thereof adjacent to the opening of the projectile barrel (21), said shield (213) having a profile adapted to fit within the interior of the projectile barrel (21), said shield (213) having a notch therein, said notch being alignable with said inlet port (211); an insertion hole (231) is formed in the armature post (23), a guide rod (232) inserted into the insertion hole (231) is fixedly arranged on the impact head (24), a protrusion (233) is arranged on the guide rod (232), a thread groove (234) is formed in the inner wall of the insertion hole (231), and in the process that the protrusion (233) moves from one end of the thread groove (234) to the other end, the rotation angle of the impact head (24) is 80-120 degrees.

4. A projectile mechanism as claimed in claim 1 or 2, wherein an inlet hopper (3) is provided at the inlet (211) of each projectile barrel (21).

5. A projectile mechanism as claimed in claim 1 or 2, wherein the end of the projectile barrel (21) provided with the opening is directed upwards, and the axis of the projectile barrel (21) is inclined at an angle of 5-30 ° to the horizontal.

6. A projectile mechanism as claimed in claim 3, wherein said sheath (213) is internally provided with an adjusting sleeve (4), said adjusting sleeve (4) having a feeding opening corresponding to said gap.

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