CN110743798B - Casting mechanism - Google Patents

Abstract

The invention provides a projectile mechanism, which belongs to the field of mechanical technology. The ejection mechanism includes a projectile barrel, a drive motor, a power supply, an armature post and an impact head. The drive motor is fixedly installed at the rear end of the projectile tube. An electrified coil is wound around the armature post. The armature post is fixed in the projectile tube. The front end of the projectile tube, the front end of the projectile tube is open, the impact head and the armature column are connected through a return spring, the output shaft of the drive motor is rotationally connected in the armature column, a combination disk is fixed on the output shaft of the drive motor, and the armature The rear end of the column is fixedly provided with a combination disk two parallel to the combination disk one. A permanent magnet strip whose magnetic pole direction coincides with the axis of the projectile tube is provided in the impact head. The drive motor is electrically connected to the power supply; a material inlet is provided on the projectile tube. When the impact head moves to the extreme position close to the opening end of the projectile tube, the feed inlet can be blocked. The invention has the advantages of simple structure and high projection accuracy.

Description

a projectile mechanism

Technical field

The invention belongs to the field of mechanical technology and relates to a projectile mechanism.

Background technique

Wenwan walnuts have very good cultural value. The similarity of Wenwan walnuts sold in pairs is very important. In addition, whether a pair of Wenwan walnuts is good or not depends first on the bone quality. Good bone quality and oiliness If it is enough, it means that the density of Wenwan's cortex is good, and it will generally look better when rolled out. Only such Wenwan walnuts have the value of being played, and Wenwan walnuts are very light and do not hit or press the hand, so it means that Wenwan walnuts are not mature. The walnuts are not oily enough, the density is not high, and the disk value is not high.

In the process of sorting pairs of walnuts, after sorting the size of the walnuts, those with similar densities are selected as one type among the walnuts of similar sizes. Wenwan walnut manufacturers and purchasers need to classify them well, and then classify them. Walnuts of comparable size and density are priced to facilitate their sale.

The existing method is manual work, which not only easily leads to different selection criteria, but also the classified walnuts still have a large size range. During the process of processing, it is easy to cause insufficient processing or over-processing. problems, especially in the mechanical grinding and polishing process. Furthermore, manual selection is costly, difficult, and difficult to classify and price.

Contents of the invention

The purpose of the present invention is to provide a projectile mechanism in view of the above-mentioned problems existing in the existing technology. The technical problems to be solved by the present invention are how to achieve projectile accuracy and simple structure.

The object of the present invention can be achieved through the following technical solutions: a projectile mechanism, characterized in that the projectile mechanism includes a projectile barrel, a driving motor, a power supply, an armature column and an impact head, and the driving motor is fixedly arranged on the projecting barrel. At the rear end, an energized coil is wound around the armature post. The armature post is fixed in the ejection tube. The impact head is slidingly connected to the front end of the ejection tube. The front end of the ejection tube is open. The impact head and the armature The columns are connected by a return spring. The output shaft of the drive motor is rotatably connected in the armature column. A coupling disk is fixedly provided on the output shaft of the drive motor. The rear end of the armature column is fixedly provided with a coupling plate. Disk 1 is parallel to disk 2. The impact head is provided with a permanent magnetic strip whose magnetic pole direction coincides with the axis of the projectile tube. The coupling disk 2 has two arc-shaped contact strips, and the two contact strips are uniform in the circumferential direction. Distributed on the combination plate two, the two ends of the energized coil are electrically connected to two contact strips respectively, and the two contact strips have the same radius. The combination plate one has two symmetrically distributed contacts, and the two contacts can respectively It rests on the two contact strips, and the two contacts are respectively connected to the positive and negative poles of the power supply. The drive motor is electrically connected to the power supply; The feed inlet can be blocked at the extreme position of one end of the barrel opening.

The driving motor is a micro motor, which only needs to drive the coupling disk 1. Its driving force and noise are relatively small. The function of the driving motor is to drive the coupling disk 1 and the coupling disk 2 to move relative to each other. During the relative movement of the two, Due to the switching of the trigger strip and the contact, the energizing direction of the energized coil is intermittently adjusted. When the end of the armature post close to the impact head and the end opposite to the permanent magnet strip in the impact head have different polarity, the impact head receives the armature post. The return spring is compressed by the adsorption force in the direction, so that the impact head vacates the feeding section of the inlet, and the walnuts enter the ejection barrel. When the direction of the current in the energized coil is switched, the armature column is close to the end of the impact head and the permanent magnet strip in the impact head. The opposite end has the same pole, and the impact head receives the repulsive force given by the armature post, plus the restoring force of the return spring, causing the impact head to move toward the opening of the projectile tube, driving the walnuts in the projectile tube to be thrown out of the projectile tube.

Control the speed of the drive motor so that the impact head vacates the feeding section at the appropriate time, so that only one or no walnuts can enter the ejection tube at a time. In principle, it is better to have a certain probability of not being able to enter the walnuts normally. , nor can there be multiple walnuts entering at a time to ensure that during the throwing process, there is a corresponding relationship between the throwing distance and the quality of the walnuts.

By switching the current direction of the energized coil, the impact head is attracted and driven away. During the pulling process, the pulling force on the impact head changes from small to large. Under the action of the return spring, the impact head cannot contact the armature column, which prevents the armature. When the pillar contacts the impact head, it causes an impact force on the walnut, causing a gap between the walnut and the impact head when the impact head instantly slides towards the opening of the ejection tube, thus affecting the projectile distance and the selection accuracy; when the impact head is far away from the armature column During the process, the driving force on the impact head changes from large to small, and combined with the characteristic that the pulling force when the impact head approaches the armature column changes from small to large, the impact head carries the walnuts and throws them with greater strength, and the walnuts are worn by the impact head smaller.

The structure of the entire ejection mechanism is very simple, and the control method is also very simple. The overall size is small, and multiple ejection mechanisms work at the same time, which greatly improves the sorting efficiency.

In the above ejection mechanism, the end of the impact head close to the armature post has an annular step, and the end of the return spring close to the impact head is connected to the annular step.

The setting of the annular step can reduce the minimum distance between the armature column and the impact head while retaining the long deformation length of the return spring, so that the driving force for throwing walnuts will not be weakened.

In the above-mentioned projectile mechanism, one end of the impact head close to the opening of the projectile tube has a sheath, the outer contour of the sheath matches the inner cavity of the projectile tube, and the sheath has a notch, and the notch It can be aligned with the feed inlet; there is a jack hole in the armature column, and a guide rod inserted in the jack hole is fixedly installed on the impact head, and there is a protrusion on the guide rod, and the jack hole There is a threaded groove on the inner wall. When the protrusion moves from one end of the threaded groove to the other end, the rotation angle of the impact head is between 80° and 120°.

During the movement of the impact head in the ejection barrel, the opening cross-section of the discharge port changes. If the impact head only moves in a straight line, there is a risk of walnuts being clamped between the impact head and the discharge port. In order to avoid this problem, To improve the feeding accuracy, through the cooperation of the thread groove and the protrusion, the impact head can move linearly and rotate at a certain angle, so that the impact head can move due to the movement of the impact head when opening and closing the discharge port. The rotation drives the walnuts away. The walnuts that are about to enter can enter the sheath more smoothly due to the rotation of the impact head. The walnuts that may be stuck by the impact head can be driven away from the movement of the impact head due to the rotation of the impact head. path, on the one hand, it protects the walnuts, and on the other hand, it can improve the feeding accuracy.

The existence of the sheath can prevent dust and impurities from entering the gap between the impact head and the projectile tube. Moreover, it can avoid the running resistance caused to the walnuts by the relative movement of the impact head and the projectile tube during the sliding process of the impact head, so that the walnuts are not affected by the impact. Wear and tear, the contact area between the walnut and the impact head is relatively stable when thrown.

In the above-mentioned projectile mechanism, a hopper is provided at the material inlet of each projectile barrel, and the opening of the hopper is located below the corresponding blanking plate.

In the above-mentioned projectile mechanism, the projectile tube is provided with one end of the opening facing upward, and the axis of the projectile tube has an inclination angle of 5 to 30° with the horizontal plane.

The ejection tubes are distributed at an angle, which can ensure that the walnuts are in contact with the end of the impact head during the return of the impact head. When the impact head drives the walnuts to be thrown, the force on the walnuts is more direct, and the actions of each ejection mechanism are more unified, and the impact on the walnuts is more uniform. The selection accuracy has been improved.

In the above-mentioned projectile mechanism, the axes of each projectile tube are in the same plane.

During the selection process, variables should be reduced as much as possible. The density of walnuts can be directly determined based on the throwing distance. Each projectile tube is in the same plane, and the throwing distance can be more directly related to the density of walnuts.

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

The specifications of each ejection mechanism are unified. However, after walnuts of different sizes enter, the contact positions between the walnuts of different sizes and the impact head are different. To be precise: the distance between the contact positions of walnuts of different sizes and the impact head and the axis of the impact head. Different sizes will affect the impact force of the projectile, as well as the projectile distance and projectile path. In order to eliminate this situation, for the projectile mechanisms corresponding to walnuts of different sizes, adjust sleeves of different thicknesses are rotated to adjust the contact position between the walnuts and the impact head. Located at the axis of the impact head.

In the above-mentioned projectile mechanism, several material receiving boxes are arranged in front of each projectile tube, and the material receiving boxes corresponding to the same projectile tube are on the same straight line.

The receiving boxes at different positions are used to receive the thrown walnuts for classification and packaging. The bottom of the receiving box is provided with soft materials, such as fine sand, etc. to prevent the walnuts from popping out after entering and also to protect the walnuts.

Description of the drawings

Figure 1 is a schematic diagram of the overall structure of this sorting device.

Figure 2 is a schematic structural diagram of the ejection mechanism.

Figure 3 is a schematic structural diagram of the size selection mechanism.

Figure 4 is a schematic structural diagram of the combination disk 1 and the combination disk 2.

In the figure, 11. Frame; 12. Conveyor belt; 121. Limit bar; 122. Leak hole; 13. Driving roller; 14. Passive roller; 15. Support block; 16. Roller; 17. Blanking plate; 18 , baffle; 181, stirring rod; 19, blocking plate; 21, ejection tube; 211, feeding port; 212, annular step; 213, sheath; 22, drive motor; 23, armature column; 231, jack; 232. Guide rod; 233. Protrusion; 234. Threaded groove; 24. Impact head; 241. Permanent magnetic strip; 25. energized coil; 26. Return spring; 27. Combination plate one; 271. Contact; 28. Combination Pan 2; 281, contact strip; 3, feed hopper; 4, adjustment sleeve.

Detailed ways

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

As shown in Figures 1 and 3, this sorting device includes a frame 11 and a filtering mechanism arranged on the frame 11. The filtering mechanism includes a number of conveyor belts 12, and each conveyor belt 12 is stacked from top to bottom. Specifically, The method is as follows: the turning radius of each conveyor belt 12 decreases from the outside to the inside, and the conveyor belt 12 with a smaller turning radius is wrapped by the conveyor belt 12 with a larger turning radius;

One end of each conveyor belt 12 is pulled by a driving roller 13, and the other end of the innermost conveyor belt 12 is pulled by a driven roller 14. The gap between adjacent conveyor belts 12 at one end of the driven roller 14 is passed through a number of fixed rollers. The support block 15 on the bracket supports, and the outer and inner sides of the support block 15 are respectively connected with rollers 16 for rotation;

A number of leak holes 122 are provided on the conveyor belt 12. From the outside to the inside, the diameter of the leak holes 122 on each conveyor belt 12 decreases in sequence;

Each conveyor belt 12 is correspondingly provided with a blanking plate 17 fixed on the frame 11. The blanking plate 17 of the innermost conveyor belt 12 is located between its channel roller and the driven roller 14. The blanking plate 17 is located between the driving roller 13 of the conveyor belt 12 and the driving roller 13 of the inner conveyor belt 12; the end of the outermost conveyor belt 12 is also provided with a lowering plate 17, so that each blanking plate 17 is in In the same plane, and distributed in order from large to small according to the filter diameter;

Both sides of each conveyor belt 12 are provided with baffles 18 fixed on the frame 11; except for the blanking plate 17 corresponding to the innermost conveyor belt 12, a block is provided above each blanking plate 17. Plate 19, the blocking plate 19 is fixed on the frame 11, and the blocking plate 19 is close to the lower surface of the conveyor belt 12 above it; several stirring rods 181 are connected between the two baffles 18 on both sides of the same conveyor belt 12;

The frame 11 is provided with ejection mechanisms that correspond to each blanking plate 17 one-to-one.

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

Step 1: Slowly put the rotted and cleaned walnuts from the outermost conveyor belt 12, from the end of the outermost layer close to its driving roller 13, with each conveyor belt 12 facing away from the driving roller 13. direction to run for a period of time, so that the outermost conveyor belt 12 drives the walnuts that cannot filter through the filter holes on the conveyor belt 12 to fall onto the next layer of conveyor belt 12, and is limited by the baffle 18 and the support block 15. Below, the walnuts that cannot be filtered through the corresponding conveyor belt 12 or cannot be filtered through the corresponding conveyor belt 12 due to stacking are located on the side of the conveyor belt 12 away from the driving roller 13;

Step 2: Pause unloading. Except for the outermost conveyor belt 12, all conveyor belts 12 run in reverse order from the inside to the outside. When a certain conveyor belt 12 runs in reverse, the other conveyor belts 12 keep running initially. direction;

Step 3: After the second step, each conveyor belt 12 inside the conveyor belt 12 that runs reversely for the last time runs in reverse order from outside to inside. When a certain conveyor belt 12 runs in reverse, the other conveyor belts 12 maintain the initial running direction; according to the control rule of the third step, among any two adjacent conveyor belts 12, the number of reverse runs of the inner conveyor belt 12 is greater than the number of reverse runs of the outer conveyor belt 12 immediately adjacent to it. once;

Step 4: Repeat steps 1 to 3 to complete the size selection process of walnuts.

The above step description process is based on the situation where the conveyor belt 12 has a large number of layers. Taking three layers as an example: the material is first cut to the outermost layer, and each conveyor belt 12 runs in the direction away from the driving roller 13 for a period of time. This running direction is called It is a forward operation, otherwise it is a reverse operation. When there is a stacking situation on each conveyor belt 12, the unloading is suspended, and the third layer runs in the reverse direction for a period of time. During this process, both the outermost layer and the middle layer are normal. After all the walnuts on the third layer are separated from the conveyor belt 12, the second layer runs in the reverse direction for a period of time, and the first and third layers run in the forward direction. After there are no accumulated walnuts on the second layer, the final The inner layer runs in the reverse direction, and similarly, the other layers run in the forward direction.

Although the steps are relatively complicated, accurate selection can be achieved through program control and the initial cutting amount. The specific selection principle is as follows:

When all the conveyor belts 12 are running forward, the walnuts are affected by the support block 15 and the baffle 18, and the walnuts that cannot filter through the corresponding filter holes are accumulated between the adjacent conveyor belts 12 on the side away from the driving roller 13, and finally Due to the long length of the outer conveyor belt 12, the walnuts that cannot be filtered through the filter holes enter the corresponding blanking plate 17. When the innermost layer runs in reverse, the stirring rod 181 drives the accumulated walnuts to disperse, so that they can be flattened again and can pass through the filter holes. The walnuts enter the blanking plate 17 corresponding to the inner conveyor belt 12, and the walnuts that cannot be filtered enter the blanking plate 17 corresponding to the upper conveyor belt 12. The sub-inner layer runs in reverse, filtering the sub-inner conveyor belt 12. The walnuts enter the innermost conveyor belt 12 again, and the innermost conveyor belt 12 needs to be sorted in reverse direction again. Therefore, the third step of the above steps is to ensure that all the filtered walnuts can be sorted until When there are no walnuts on all the conveyor belts 12, the material is cut again. By repeating this process, all the walnuts can be accurately selected.

The whole structure is very simple and small in size. Each conveyor belt 12 is stacked and each blanking plate 17 is located inside it.

The conveyor belt 12 can be horizontal, or one side of the driving roller 13 can be tilted downward at a certain angle. The setting of the support block 15 can ensure that the walnuts will not be sandwiched between the adjacent conveyor belts 12 near one end of the driven roller 14.

After being sorted and classified, contracts with different diameters enter the corresponding ejection mechanism from their respective blanking plates 17. The ejection mechanism can be an existing structure, such as a cylinder with an opening facing upward and forward, and a sliding plate slidingly connected to the cylinder. A spring is connected to the slide plate and the bottom of the cylinder. After the walnuts fall in, the spring can be compressed and thrown out of the cylinder under the restoring force of the spring.

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

The conveyor belt 12 made of transparent material allows workers to observe the status of walnuts on the conveyor belt 12 so as to adjust the operating parameters of the conveyor belt 12 in a timely manner.

A number of limiting bars 121 are provided on the outer side of the conveyor belt 12 , and the limiting bars 121 are provided along the running direction of the conveyor belt 12 . The limiting strip 121 can make the walnuts move according to the trajectory during the rolling process and the process of being driven in the reverse direction, thereby improving the filtration efficiency and reducing the clogging of the filter holes caused by multiple walnuts sharing the filter hole cross-section.

One end of the blanking plate 17 is inclined toward the side perpendicular to the running direction of the conveyor belt 12, so that the plane where the blanking plate 17 is located and the plane where the conveyor belt 12 is located form an inclination angle of less than 20°.

As shown in Figures 2 and 4, the ejection mechanism includes a ejection barrel 21, a driving motor 22, a power supply, an armature post 23 and an impact head 24. The drive motor 22 is fixedly arranged at the rear end of the ejection tube 21, and the armature post 23 is wound with a The energized coil 25 and the armature post 23 are fixed in the projectile tube 21. The impact head 24 is slidingly connected to the front end of the projectile tube 21. The front end of the projectile tube 21 is open. The impact head 24 and the armature post 23 are connected through a return spring 26 to drive The output shaft of the motor 22 is rotatably connected in the armature column 23. A coupling disk 27 is fixedly provided on the output shaft of the drive motor 22, and a coupling disk 28 parallel to the coupling disk 27 is fixedly provided at the rear end of the armature column 23. The head 24 is provided with a permanent magnet strip 241 whose magnetic pole direction coincides with the axis of the projectile barrel 21. The second coupling disk 28 has two arc-shaped contact strips 281. The two contact strips 281 are evenly distributed circumferentially on the second coupling disk 28. , the two ends of the energized coil 25 are electrically connected to two contact strips 281 respectively, and the two contact strips 281 have the same radius. The combination plate 27 has two symmetrically distributed contacts 271, and the two contacts 271 can respectively abut against the two contact strips 281. On a contact strip 281, two contacts 271 are respectively connected to the positive and negative poles of the power supply, and the drive motor 22 is electrically connected to the power supply; an inlet 211 is provided on the projectile barrel 21, and the impact head 24 moves to the limit close to the opening end of the projectile barrel 21 When in position, the feed inlet 211 can be blocked.

The driving motor 22 is a micro motor, which only needs to drive the coupling disk one 27, and its driving force and noise are relatively small. The function of the driving motor 22 is to drive the coupling disk one 27 and the coupling disk two 28 to move relative to each other. During the movement, due to the switching of the trigger bar and the contact 271, the energizing direction of the energizing coil 25 is intermittently adjusted. When the armature post 23 is close to the impact head 24, one end is directly opposite to the permanent magnet strip 241 in the impact head 24. When one end is in different polarity, the impact head 24 receives the adsorption force in the direction of the armature post 23 and compresses the return spring 26, so that the impact head 24 vacates the feeding section of the feed port 211, and the walnuts enter the ejection tube 21. When the current direction of the energized coil 25 is After being switched, the end of the armature post 23 close to the impact head 24 has the same polarity as the end facing the permanent magnet strip 241 in the impact head 24. The impact head 24 receives the repulsive force given by the armature post 23, plus the restoring force of the return spring 26, The impact head 24 is moved toward the opening direction of the projectile tube 21 to drive the walnuts in the projectile tube 21 to be thrown out of the projectile tube 21 .

Control the rotational speed of the drive motor 22 so that the impact head 24 vacates the material inlet 211 for an appropriate time, so that only one or no walnuts can enter the projectile tube 21 at a time. In principle, it is better to have a certain probability of not entering. The walnuts can be entered normally, and multiple walnuts cannot be entered at a time to ensure that there is a corresponding relationship between the throwing distance and the quality of the walnuts during the throwing process.

By switching the current direction of the energized coil 25, the impact head 24 is attracted and driven away. During the pulling process, the pulling force on the impact head 24 changes from small to large. Under the action of the return spring 26, the impact head 24 cannot interact with the armature. The post 23 contacts to avoid the impact force on the walnut when the armature post 23 contacts the impact head 24, so that when the impact head 24 instantly slides toward the opening direction of the projectile tube 21, there will be a gap between the walnut and the impact head 24, thereby affecting the projectile distance. Affects the selection accuracy; in the process of the impact head 24 moving away from the armature post 23, the driving force received by the impact head 24 changes from large to small. In conjunction with the characteristic that the pulling force of the impact head 24 changes from small to large when it approaches the armature post 23, the impact head 24 becomes smaller. 24 carries the walnuts and throws them with greater intensity, and the walnuts suffer less wear from the impact head 24 .

The structure of the entire ejection mechanism is very simple, and the control method is also very simple. The overall size is small, and multiple ejection mechanisms work at the same time, which greatly improves the sorting efficiency.

The end of the impact head 24 close to the armature post 23 has an annular step 212, and the end of the return spring 26 close to the impact head 24 is connected to the annular step 212. The arrangement of the annular step 212 can reduce the minimum distance between the armature column 23 and the impact head 24 while retaining the longer deformation length of the return spring 26, so that the driving force for throwing walnuts will not be weakened.

The end of the impact head 24 close to the opening of the projectile tube 21 has a sheath 213. The outer profile of the sheath 213 is adapted to the inner cavity of the projectile tube 21. The sheath 213 has a notch, which can be aligned with the feed port 211; the armature column 23 is provided with a jack 231, and the impact head 24 is fixedly provided with a guide rod 232 inserted in the jack 231. The guide rod 232 has a protrusion 233, and the inner wall of the jack 231 has a threaded groove 234. The protrusion When 233 moves from one end of the threaded groove 234 to the other end, the rotation angle of the impact head 24 is between 80° and 120°.

During the movement of the impact head 24 in the ejection barrel 21, the opening cross section of the discharge port changes. If the impact head 24 only moves linearly, there is a risk of walnuts being clamped between the impact head 24 and the discharge port. In order to avoid This problem improves the accuracy of feeding. Through the cooperation of the thread groove 234 and the protrusion 233, the impact head 24 moves linearly and rotates at a certain angle, so that the impact head 24 opens and closes the unloading port. When opening the mouth, the walnuts can be driven away due to the rotation of the impact head 24. The walnuts that are about to enter can enter the sheath 213 more smoothly due to the rotation of the impact head 24. The walnuts that may cause the impact head 24 to get stuck, because The rotation of the impact head 24 can drive it away from the movement path of the impact head 24, which on the one hand protects the walnuts and on the other hand can improve the feeding accuracy.

The existence of the sheath 213 can prevent dust and impurities from entering the gap between the impact head 24 and the projectile tube 21, and can avoid the movement of the walnuts caused by the relative movement of the impact head 24 and the projectile tube 21 during the sliding process of the impact head 24. The resistance prevents the walnuts from being worn, and the contact part between the walnuts and the impact head 24 is relatively stable when thrown.

A hopper 3 is provided at the material inlet 211 of each projectile barrel 21 , and the opening of the hopper 3 is located below the corresponding blanking plate 17 .

The projectile tube 21 is provided with an open end facing upward, and the axis of the projectile tube 21 has an inclination angle of 5 to 30° with the horizontal plane. The projectile tubes 21 are distributed at an angle, which can ensure that during the return process of the impact head 24, the walnuts remain in contact with the end of the impact head 24. When the impact head 24 drives the walnuts to be thrown, the force on the walnuts is more direct, and each ejection mechanism moves It is more unified and improves the selection accuracy.

The axes of each projectile tube 21 are in the same plane. During the selection process, variables should be reduced as much as possible. The density of walnuts can be directly determined based on the throwing distance. Each throwing tube 21 is in the same plane, and the throwing distance can be more directly related to the density of walnuts.

An adjusting sleeve 4 is inserted into the sheath 213, and the adjusting sleeve 4 has a feeding port corresponding to the notch. The specifications of each ejection mechanism are unified. However, after walnuts of different sizes enter, the contact positions between the walnuts of different sizes and the impact head 24 are different. To be precise, the contact positions between the walnuts of different sizes and the impact head 24 are away from the axis of the impact head 24. Different distances will affect the impact force of the projectile, as well as the projectile distance and projectile path. In order to eliminate this situation, for the projectile mechanisms corresponding to walnuts of different sizes, adjust sleeves 4 of different thicknesses are rotated to adjust the impact of the walnuts. The contact position of the head 24 is located at the axis position of the impact head 24 .

A number of material receiving boxes are arranged in front of each projectile tube 21, and the material receiving boxes corresponding to the same projectile tube 21 are on the same straight line. The receiving boxes at different positions are used to receive the thrown walnuts for classification and packaging. The bottom of the receiving box is provided with soft materials, such as fine sand, etc. to prevent the walnuts from popping out after entering and also to protect the walnuts.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which the present invention belongs can make various modifications or additions to the described specific embodiments or substitute them in similar ways, but this will not deviate from the spirit of the present invention or exceed the definition of the appended claims. range.

Claims (3)

1. A projectile mechanism, characterized in that the projectile mechanism includes a projectile barrel (21), a drive motor (22), a power supply, an armature column (23) and an impact head (24), and the drive motor (22) is fixed Arranged at the rear end of the projectile tube (21), an electrified coil (25) is wound around the armature post (23), the armature post (23) is fixed in the projectile tube (21), and the impact head (24 ) is slidingly connected to the front end of the projectile tube (21), which is open. The impact head (24) and the armature column (23) are connected through a return spring (26). The drive The output shaft of the motor (22) is rotatably connected in the armature column (23). A coupling disk (27) is fixedly provided on the output shaft of the drive motor (22), and the rear end of the armature column (23) is fixedly provided. There is a second combination disk (28) parallel to the first combination disk (27). The impact head (24) is provided with a permanent magnetic strip (241) whose magnetic pole direction coincides with the axis of the projectile barrel (21). The combination disk There are two arc-shaped contact strips (281) on the second (28). The two contact strips (281) are evenly distributed on the second coupling plate (28) in the circumferential direction. The two ends of the energized coil (25) are electrically connected respectively. Two contact strips (281), the two contact strips (281) have the same radius. The first combination plate (27) has two symmetrically distributed contact points (271), and the two contact points (271) can respectively abut against each other. On the two contact strips (281), the two contacts (271) are respectively connected to the positive and negative poles of the power supply, and the drive motor (22) is electrically connected to the power supply; the ejection tube (21) is provided with a material feeding port (211), when the impact head (24) moves to the extreme position close to the opening end of the projectile tube (21), it can block the feed port (211); The end of the impact head (24) close to the armature post (23) has an annular step (212), and the end of the return spring (26) close to the impact head (24) is connected to the annular step (212); One end of the impact head (24) close to the opening of the projectile barrel (21) has a sheath (213). The outer contour of the sheath (213) is adapted to the inner cavity of the projectile barrel (21). The sheath (213) ) has a gap that can be aligned with the feed inlet (211); a socket (231) is provided in the armature column (23), and a plug-in hole (231) is fixedly provided on the impact head (24). The guide rod (232) in the insertion hole (231), the guide rod (232) has a protrusion (233), the inner wall of the insertion hole (231) has a threaded groove (234), the protrusion (233) During the process of moving from one end of the threaded groove (234) to the other end, the rotation angle of the impact head (24) is between 80° and 120°; A hopper (3) is provided at the feed port (211) of each projectile barrel (21). 2. A projectile mechanism according to claim 1, characterized in that the projectile tube (21) is provided with one end of the opening facing upward, and the axis of the projectile tube (21) is 5 to 30° from the horizontal plane. of inclination. 3. A projectile mechanism according to claim 2, characterized in that an adjustment sleeve (4) is inserted into the sheath (213), and the adjustment sleeve (4) has a feeding port corresponding to the notch. .