Vibration feeding device based on voice coil motor and vibration feeding method

Abstract

The application discloses a vibrating feeding device and method based on a voice coil motor, which comprises a support, a bottom plate and a voice coil motor, the bottom plate is movably installed on the support, the first end of the voice coil motor is fixed on the support, and the second end is fixed on the bottom plate; a first vibrating plate and a second vibrating plate are arranged above the bottom plate, a plurality of guide rods are arranged on the first vibrating plate and the second vibrating plate, the first end of the guide rod is fixed on the bottom plate, and damping springs are arranged between the two ends of the guide rod and the first vibrating plate and the second vibrating plate; the vibrating feeding device further comprises a feeding bin and a chute, the feeding bin is installed on the first vibrating plate, the chute is installed on the second vibrating plate, the height of the feeding inlet of the chute is greater than the height of the discharging outlet of the chute, the feeding inlet of the chute is matched with the discharging outlet of the feeding bin, the first vibrating plate and the second vibrating plate are arranged at intervals, and the stiffness of the damping spring on the guide rod of the first vibrating plate is smaller than the stiffness of the damping spring on the guide rod of the second vibrating plate. The working condition adaptation capability is good.

Description

Technical Field

[0001] This invention belongs to the field of material transportation technology, specifically relating to a vibratory feeding device and vibratory feeding method based on a voice coil motor. Background Technology

[0002] In many fields such as industrial production, material processing, and precision manufacturing, feeding equipment serves as the core device for material transfer and quantitative supply. Its performance directly determines the efficiency, accuracy, and product quality of subsequent production processes. With the rapid development of automation technology and the precision manufacturing industry, traditional feeding equipment based on electromagnetic vibration and eccentric wheel drives can no longer meet the demands of modern production, which require high precision and dynamic response. Feeding equipment based on voice coil motors (VCMs) has attracted attention due to its high control precision and fast response speed.

[0003] However, current feeding equipment based on voice coil motors has poor adaptability to different operating conditions, making it difficult to meet the multi-condition and highly dynamic feeding needs of modern industrial production. Summary of the Invention

[0004] The purpose of this invention is to provide a vibration feeding device and a vibration feeding method based on a voice coil motor, which can improve the adaptability of the feeding equipment based on the voice coil motor, while ensuring feeding efficiency and accuracy.

[0005] The technical solution is as follows:

[0006] The first aspect of the present invention provides a vibratory feeding device based on a voice coil motor, comprising:

[0007] The system comprises a bracket, a base plate, and a voice coil motor, wherein the base plate is movably mounted on the bracket, and the first end of the voice coil motor is fixed on the bracket and the second end is fixed on the base plate.

[0008] A first vibration plate and a second vibration plate are provided above the base plate. Multiple guide rods are passed through the first vibration plate and the second vibration plate. The first end of the guide rod is fixed to the base plate. Shock-absorbing springs are sleeved between the two ends of the guide rod and the first vibration plate and between the guide rod and the second vibration plate.

[0009] It also includes a feeding bin and a trough. The feeding bin is installed on the first vibrating plate; the trough is installed on the second vibrating plate. The height of the inlet of the trough is greater than the height of the outlet of the trough, and the inlet of the trough is adapted to the outlet of the feeding bin.

[0010] The first and second vibration plates are spaced apart; the stiffness of the damping spring on the guide rod of the first vibration plate is less than the stiffness of the damping spring on the guide rod of the second vibration plate.

[0011] In one embodiment, the base plate includes a first base plate and a second base plate. The first end of the guide rod on the first vibrating plate is fixed to the first base plate, and the first end of the guide rod on the second vibrating plate is fixed to the second base plate. Both the first and second base plates are equipped with slide blocks and slide rails. The slide rails are installed in conjunction with the slide blocks of the second base plate and the slide blocks of the first base plate. The first vibrating plate, the first base plate, and the feeding bin constitute a first vibrating feeding mechanism. The second vibrating plate, the second base plate, and the trough constitute a second vibrating feeding mechanism. The second vibrating feeding mechanism can be separated from the first vibrating feeding mechanism as a whole through the slide rails.

[0012] In one embodiment, magnets are installed on the adjacent edges of the first base plate and the second base plate, and the magnets of the first base plate and the second base plate are attracted to each other by opposite poles.

[0013] In one embodiment, the first vibrating plate is further provided with a counterweight fixing member;

[0014] And / or,

[0015] The bracket is mounted on the weighing sensor;

[0016] And / or,

[0017] Multiple guide rods are mounted on the first base plate. The first end of each guide rod is fixed to the bracket, and shock-absorbing springs are fitted between the two ends of the guide rod and the first base plate.

[0018] In one embodiment, a V-shaped groove is provided on the inner bottom wall of the material trough, a lifting mechanism is installed on the material trough, and a baffle plate is fixed on the lifting mechanism. The baffle plate has a first position and a second position. In the first position, the bottom end of the baffle plate is flush with the top end of the V-shaped groove, and in the second position, the bottom end of the baffle plate is higher than the top end of the V-shaped groove.

[0019] In one embodiment, the feed trough is hinged to the second vibrating plate, an inclination sensor is installed on the feed trough, and a control device and an angle adjustment mechanism for adjusting the inclination angle of the feed trough are also provided. The control device is electrically connected to the inclination sensor and the angle adjustment mechanism.

[0020] In one embodiment, the angle adjustment mechanism includes an electric push rod, a transmission component, and a limiting component. The transmission component is installed at the output end of the electric push rod, the limiting component is provided with an arc-shaped track, the material trough is provided with a transmission shaft passing through the arc-shaped track, the transmission shaft is fitted with a bearing that cooperates with the arc-shaped track, and the end of the transmission shaft is fixed to the transmission component.

[0021] In one embodiment, a connecting plate is fixed on the second base plate, the connecting plate is located above the second base plate, the second vibration plate is fixed on the connecting plate, the limiting plate is installed on the connecting plate, the electric push rod is installed on the second vibration plate, and the first end of the guide rod of the second vibration plate is fixed on the connecting plate.

[0022] And / or,

[0023] The stiffness of the damping spring on the guide rod of the second vibration plate is 2 to 5 times that of the damping spring on the guide rod of the first vibration plate.

[0024] A second aspect of the present invention provides a vibratory feeding method, comprising:

[0025] Adjust the inclination angle of the trough to the first angle, and the outlet of the trough will be fully opened;

[0026] The voice coil motor is driven to vibrate the feed bin at the first frequency, causing the material in the feed bin to be vibrated and loosened before being spread flat in the feed trough for feeding.

[0027] When the ratio of the weight of the fed material to the total weight of the fed material reaches the preset threshold, the inclination angle of the trough is adjusted to the second angle, the outlet of the trough is opened, and the voice coil motor is driven to vibrate the trough at the second frequency to feed the material until the feeding is completed.

[0028] In one embodiment, the first frequency is determined according to the material characteristics. Before vibrating the feed hopper at the first frequency, a frequency sweep test is performed in advance. The mass of the counterweight is adjusted according to the resonant frequency calculation formula until the resonant frequency approaches the selected frequency. The counterweight vibrates together with the feed hopper.

[0029] The technical solution provided by this invention has the following advantages and effects:

[0030] The vibration feeding device based on a voice coil motor of the present invention designs guide rods and damping springs on the first and second vibration plates. The stiffness of the damping spring on the guide rod of the first vibration plate is less than that of the damping spring on the guide rod of the second vibration plate. The feeding bin is installed on the first vibration plate, and the feed trough is installed on the second vibration plate, with the first and second vibration plates spaced apart. This allows the voice coil motor to selectively excite a "low-frequency, high-amplitude" coarse feeding mode or a "high-frequency, low-amplitude" fine feeding mode by using different vibration frequencies. This can accommodate the conflicting needs of "large-flow, rapid feeding" and "small-flow, precise feeding," perfectly balancing high efficiency and high precision in a single feeding device, and improving the adaptability of the feeding device to different operating conditions.

[0031] The vibration feeding method of the present invention can switch between coarse feeding mode and fine feeding mode simply by changing the frequency of the voice coil motor, and has good adaptability to working conditions. Attached Figure Description

[0032] Figure 1 A schematic diagram of an embodiment of a feeding device using the feeding device of the present invention;

[0033] Figure 2 This is a perspective view of an embodiment of the feeding device of the present invention;

[0034] Figure 3 for Figure 2 Another perspective view of the feeding device;

[0035] Figure 4 This is a perspective view of the second vibrating feeding mechanism in an embodiment of the feeding device of the present invention;

[0036] Figure 5 This is a flowchart of an embodiment of the vibration feeding method of the present invention.

[0037] Explanation of reference numerals in the attached figures:

[0038] 10. Main frame; 11. Load-bearing plate; 12. Support platform; 20. Shock absorber; 30. Weighing sensor.

[0039] 100. Feeding device; 110. Support; 120. First base plate; 121. First guide rod; 122. First damping spring; 123. Counterweight fixing piece; 130. Second base plate; 131. Column; 132. Connecting plate; 133. Slide; 134. Slide rail; 135. Magnet; 140. Voice coil motor; 150. First vibrating plate; 151. Second guide rod; 152. Second damping spring; 160. Feeding bin; 170. Second vibrating plate; 171. The first... 172. Three guide rods; 180. Third damping spring; 181. Material trough; 182. Inlet; 183. Outlet; 184. V-groove; 185. Lifting mechanism; 1841. Cylinder; 1842. Adjusting plate; 185. Baffle plate; 186. Hinge; 187. Tilt sensor; 188. Angle adjustment mechanism; 1881. Electric push rod; 1882. Transmission component; 1883. Limiting component; 1884. Arc track; 189. Drive shaft; 1891. Bearing.

[0040] 200. Receiving device; 210. Funnel; 220. Finished product tank. Detailed Implementation

[0041] To facilitate understanding of the present invention, specific embodiments of the present invention will be described in more detail below with reference to the accompanying drawings.

[0042] Unless otherwise specified or defined, the terms "first," "second," etc., used in this document are for distinguishing names only and do not represent a specific number or order.

[0043] Unless otherwise stated or defined, the term “and / or” as used herein includes any and all combinations of one or more of the related listed items.

[0044] It should be noted that in this article, "fixed to" or "connected to" can mean directly fixed to or connected to a component, or indirectly fixed to or connected to a component.

[0045] This invention provides a high-precision, high-efficiency vibratory feeder for powders, granules, and other bulk materials, which can be widely used in pharmaceutical, food, chemical, lithium battery, and electronic materials industries. Through innovative mechanical structure, the device is equipped with two independent resonant frequencies. The voice coil motor only needs to switch between a single frequency to selectively excite either a "low-frequency, high-amplitude" coarse feeding mode or a "high-frequency, low-amplitude" fine feeding mode, thus perfectly balancing high efficiency and high precision in a single feeding device and improving its adaptability to various operating conditions.

[0046] Figure 1 The diagram shown is a schematic representation of an embodiment of a feeding device applying the feeding device of the present invention. (Reference) Figure 1 The lower part is the main frame 10, which is mounted on a shock absorber 20 fixed to the ground. During equipment operation, the shock absorber 20 provides vibration damping to ensure stable operation of the feeding equipment. The feeding device 100 is installed on the left side of the main frame 10, and the receiving device 200 is installed on the right side of the main frame 10. The main frame 10 has a load-bearing plate 11, on which a weighing sensor 30 is installed. The feeding device 100 is placed on the weighing sensor 30, which ensures metering accuracy during feeding. A support platform 12 is also fixed on the load-bearing plate 11, and the receiving device 200 is fixed on the support platform 12. The receiving device 200 includes a funnel 210 and a finished product tank 220. The funnel 210 is located below the outlet of the material trough, and the finished product tank 220 is installed at the outlet of the funnel 210 to collect materials.

[0047] Figure 2 The image shown is a perspective view of an embodiment of the feeding device. (Refer to...) Figure 2The bottom is a bracket 110, which is mounted on the load cell 30. A first base plate 120 and a second base plate 130 are positioned above the bracket 110. Multiple, but not limited to four, first guide rods 121 are threaded through the first base plate 120. The first end of each first guide rod 121 is fixed to the bracket 110, and the second end is located above the bracket 110. First damping springs 122 are fitted between the first end of the first guide rod 121 and the first base plate 120, and between the second end of the first guide rod 121 and the first base plate 120. The first end of the voice coil motor 140 is fixed to the bracket 110, and the second end is fixed to the first base plate 120. For example, the outer ring base plate (magnetic cylinder) of the voice coil motor 140 is fixed to the bracket 110, and the inner ring top plate (coil) is fixed to the first base plate 120. The voice coil motor 140 serves as the power source. The magnetic cylinder itself generates a magnetic field, and the coil also generates a magnetic field when energized. This produces an upward Ampere force. By changing the direction of the current, the direction of the force is changed, thereby causing the first base plate 120 to vibrate up and down. When the first base plate 120 vibrates, the first guide rod 121 acts as a guide, and the first damping spring 122 provides a symmetrical restoring force. The cooperation between the first guide rod 121 and the first damping spring 122 ensures linear motion, provides stability, and also has the advantages of being frictionless, wear-free, and maintenance-free.

[0048] A first vibrating plate 150 is provided above a first base plate 120. Multiple second guide rods 151 are threaded through the first vibrating plate 150. The first end of each second guide rod 151 is fixed to the first base plate 120, and the second end is positioned above the first vibrating plate 150. Second damping springs 152 are fitted between the first end of each second guide rod 151 and the first vibrating plate 150, and between the second end of each second guide rod 151 and the first vibrating plate 150. The second guide rods 151 and the second damping springs 152 function similarly to the first guide rods 121 and the first damping springs 122, causing the first vibrating plate 150 to vibrate up and down on the second guide rods 151. A feeding bin 160 is installed on the first vibrating plate 150. The first vibrating plate 150, the first base plate 120, and the feeding bin 160 constitute a first vibrating feeding mechanism. When the first vibrating plate 150 vibrates, it loosens the material in the feeding bin 160.

[0049] A column 131 is installed on the second base plate 130, and a connecting plate 132 is fixed to the top of the column 131. The connecting plate 132 is located above the second base plate 130. A second vibrating plate 170 is provided above the connecting plate 132, and multiple third guide rods 171 are threaded through the second vibrating plate 170. The first end of the third guide rod 171 is fixed to the connecting plate 132, and the second end is located above the second vibrating plate 170. A third damping spring 172 is sleeved between the first end of the third guide rod 171 and the second vibrating plate 170, and between the second end of the third guide rod 171 and the second vibrating plate 170. The function of the third guide rod 171 and the third damping spring 172 is similar to that of the first guide rod 121 and the first damping spring 122, causing the second vibrating plate 170 to vibrate up and down on the third guide rod 171. A material trough 180 is mounted on the second vibrating plate 170. One end of the trough 180 has a feed inlet 181, the shape and structure of which are not limited, but are adapted to the discharge outlet of the feeding bin 160 and located below the discharge outlet of the feeding bin 160. The other end of the trough 180 has a discharge outlet 182 for discharging material to the receiving device 200. The trough 180 is inclined, and the height of the feed inlet 181 is greater than the height of the discharge outlet 182. The second vibrating plate 170, the second base plate 130, and the trough 180 constitute the second vibrating feeding mechanism. When the trough 180 vibrates, material moves from the feed inlet 181 to the discharge outlet 182.

[0050] In some embodiments, the column 131 and connecting plate 132 are not provided; instead, the second vibrating plate 170 is directly mounted on the second base plate 130 via the third guide rod 171. In this case, the first end of the third guide rod 171 is fixed to the second base plate 130.

[0051] The first vibrating plate 150 and the second vibrating plate 170 are spaced apart, and the stiffness of the second damping spring 152 is less than that of the third damping spring 172. This arrangement allows the feeding device 100 to have two resonant frequencies (i.e., two vibration frequencies when the voice coil motor 140 is operating), used for coarse feeding and fine feeding respectively. During coarse feeding, a "low-frequency, high-amplitude" vibration occurs, with the second damping spring 152, the feeding bin 160, and the first vibrating plate 150 resonating. During fine feeding, a "high-frequency, low-amplitude" vibration occurs, with the third damping spring 172, the trough 180, and the second vibrating plate 170 resonating. Specifically, the resonant frequency during coarse feeding is mainly achieved by the second damping spring 152 vibrating the feeding bin 160, loosening the material in the feeding bin 160 and evenly spreading it in the trough 180 before conveying it to the receiving device 200. At this point, because the stiffness of the second damping spring 152 is different from that of the third damping spring 172, the impact on the third damping spring 172 is negligible, and the impact on the material trough 180 is also slight and can be ignored. The resonance frequency during fine feeding is mainly achieved by the third damping spring 172 vibrating the material trough 180, accurately feeding the material in the material trough 180 to the receiving device 200. At this frequency, because the stiffness of the second damping spring 152 is different from that of the third damping spring 172, the impact on the second damping spring 152 is negligible, and the impact on the feeding bin 160 is also slight and can be ignored. Therefore, coarse feeding and fine feeding can adapt to different working conditions, ensuring both feeding efficiency and improving feeding accuracy. Preferably, the stiffness of the third damping spring 172 is 2 to 5 times that of the second damping spring 152, so that the two resonance frequencies can be clearly distinguished. For example, the resonance frequency of the first vibrating feeder mechanism is 30 Hz, and the resonance frequency of the second vibrating feeder mechanism is 70 Hz.

[0052] Figure 3 The image shown is a perspective view of another embodiment of the feeding device. (Reference) Figure 3In this embodiment, both the bottom of the first base plate 120 and the second base plate 130 are equipped with slide blocks 133, and slide rails 134 are embedded in the slide blocks 133 of the first base plate 120 and the second base plate 130. Specifically, the slide blocks 133 of the first base plate 120 and the slide blocks 133 of the second base plate 130 each have two rows, and two slide rails 134 are respectively installed under the first base plate 120 and the second base plate 130 through the two rows of slide blocks 133. During installation, the second base plate 130 is spliced ​​onto the first base plate 120 by fitting the slide blocks 133 of the second base plate 130 onto the slide rails 134 and pushing them towards the first base plate 120. By designing the slide rails 134, the second base plate 130 is supported, and the second base plate 130 does not need to be fixed separately. A voice coil motor 140 can vibrate the first base plate 120 and the second base plate 130 simultaneously, so that a voice coil motor 140 can achieve two feeding modes by vibrating at different frequencies. In addition, the second vibrating feeding mechanism can be separated from the first vibrating feeding mechanism via the slide rail 134, meaning the second vibrating feeding mechanism can be removed along the slide rail 134 for easy cleaning and maintenance of the material trough 180. In contrast, existing feeding devices often have a rigid connection between the material trough and the drive components, making disassembly and cleaning inconvenient, increasing downtime, and making cleaning and maintenance difficult, thus failing to meet high hygiene standards such as GMP.

[0053] Furthermore, in this embodiment, magnets 135 are installed on the adjacent edges of the first base plate 120 and the second base plate 130, and the magnets 135 of the first base plate 120 and the second base plate 130 are attracted by opposite poles. This design makes disassembly and assembly convenient and increases the stability of the second base plate 130.

[0054] In this embodiment, a counterweight fixing member 123 is also provided on the first base plate 120 for mounting the counterweight. The resonance frequency f1 during coarse feeding is selected according to different materials. By adjusting the total mass of the counterweight installed on the counterweight fixing member 123, the resonance frequency of the first vibrating feeding mechanism is made to approach the selected frequency f1.

[0055] In some embodiments, convenient disassembly of the second vibrating feeding mechanism is not a concern; in this case, the first base plate 120 and the second base plate 130 are designed as a single base plate. In this configuration, the base plate is also movably mounted on the bracket 110 via the first guide rod 121. The first end of the voice coil motor 140 is fixed to the bracket 110, and the second end is fixed to the base plate. The specific position of the voice coil motor 140 is not limited. In this configuration, if the column 131 and connecting plate 132 are not provided, the second vibrating plate 170 is movably mounted on the base plate, and the first end of the third guide rod 171 is fixed to the base plate.

[0056] Figure 4 The image shown is a perspective view of the second vibrating feeding mechanism in an embodiment of the feeding device. (Reference) Figure 4As shown, to improve the discharge accuracy, a V-shaped groove 183 is provided on the bottom wall inside the trough 180. During coarse feeding, the V-shaped groove 183 allows the material to be evenly spread in the trough 180. During fine feeding, since the material has already been loosely and evenly spread on the bottom of the V-shaped groove 183 during coarse feeding, the V-shaped groove 183 acts like a metering device, and the material discharged with each vibration is very uniform. Therefore, the V-shaped groove 183 can ensure the discharge accuracy. A lifting mechanism 184 is also installed on the feed trough 180. A baffle plate 185 is fixed on the lifting mechanism 184. The lifting mechanism 184 drives the baffle plate 185 to move up and down. The baffle plate 185 has a first position and a second position. During fine feeding, the baffle plate 185 is in the first position, at which time the bottom end of the baffle plate 185 is flush with the top end of the V-shaped groove 183. During coarse feeding, the baffle plate 185 is in the second position, at which time the bottom end of the baffle plate 185 is higher than the top end of the V-shaped groove 183. For example, the bottom end of the baffle plate 185 is flush with the top end of the feed trough 180. When feeding ends, the bottom end of the baffle plate 185 is flush with the bottom end of the feed trough 180, and the discharge port 182 is closed. The discharge accuracy is improved by controlling the size of the discharge port 182 through the baffle plate 185. Specifically, the lifting mechanism 184 includes a cylinder 1841 and an adjusting plate 1842. The adjusting plate 1842 is installed at the output end of the cylinder 1841, and the baffle plate 185 is fixed on the adjusting plate 1842. By adjusting the height of the adjusting plate 1842 through the cylinder 1841, the position of the baffle plate 185 is moved, thereby adjusting the opening and closing size of the discharge port 182 and ensuring accurate feeding in the dual-stage feeding mode.

[0057] In this embodiment, the feed trough 180 is hinged to the second vibrating plate 170 via a hinge 186. An inclination sensor 187 is also installed on the feed trough 180 to detect the inclination angle of the feed trough 180 (the angle between the centerline of the feed trough and the horizontal line). A control device and an angle adjustment mechanism 188 are also provided. The angle adjustment mechanism 188 is used to adjust the inclination angle of the feed trough 180. The control device is electrically connected to the inclination sensor 187 and the angle adjustment mechanism 188. Through the cooperation of the inclination sensor 187 and the angle adjustment mechanism 188, the inclination angle of the feed trough 180 can be precisely controlled. For example, during coarse feeding, the inclination angle of the feed trough 180 is adjusted to 5°, and during fine feeding, the inclination angle of the feed trough 180 is adjusted to 1°.

[0058] Specifically, the angle adjustment mechanism 188 includes an electric push rod 1881, a transmission component 1882, and a limiting component 1883. The electric push rod 1881 is mounted on the second vibrating plate 170, and the transmission component 1882 is mounted on the output end of the electric push rod 1881. The electric push rod 1881 drives the transmission component 1882 to move up and down. The limiting component 1883 is mounted on the connecting plate 132 and has an arc-shaped track 1884. A transmission shaft 189 is fixed on the trough 180. The transmission shaft 189 passes through the arc-shaped track 1884 and its end is fixed on the transmission component 1882. A bearing 1891 that mates with the arc-shaped track 1884 is sleeved on the transmission shaft 189. When the transmission component 1882 moves up and down, it drives the trough 180 to rotate around the hinge point between the trough 180 and the second vibrating plate 170 via the transmission shaft 189, thereby adjusting the inclination angle of the trough 180. When the feed trough 180 rotates, the bearing 1891 on the drive shaft 189 moves within the arc-shaped track 1884. During the vibration of the feed trough 180, the bearing 1891 also provides rolling friction to prevent the generation of foreign objects and noise.

[0059] The fixing method of the electric push rod 1881 and the limiting member 1883 is not limited. When the connecting plate 132 is not provided, the electric push rod 1881 and the limiting member 1883 can also be directly fixed to the second base plate 130. Compared with this embodiment, the design of this embodiment can effectively reduce the size and weight of the electric push rod and the limiting member, improve the stability when adjusting the angle of the feed trough, and make the device lighter and more durable.

[0060] In summary, this embodiment designs guide rods and damping springs on the first and second vibrating plates. The stiffness of the damping spring on the guide rod of the first vibrating plate is less than that of the damping spring on the guide rod of the second vibrating plate. The feed hopper is installed on the first vibrating plate, and the feed trough is installed on the second vibrating plate, with the first and second vibrating plates spaced apart. With this design of the first and second vibrating feeding mechanisms, the voice coil motor can use different vibration frequencies to selectively excite either a "low-frequency, high-amplitude" coarse feeding mode or a "high-frequency, low-amplitude" fine feeding mode. This addresses the conflicting needs of "large-flow, rapid feeding" and "small-flow, precise feeding," perfectly balancing high efficiency and high precision in a single feeding device, thus improving the adaptability of the feeding device to different operating conditions.

[0061] This embodiment also provides a vibration feeding method based on a voice coil motor, such as... Figure 5 As shown, the specific steps include:

[0062] Step S100: Adjust the inclination angle of the trough to the first angle, and fully open the outlet of the trough;

[0063] Step S200: Drive the voice coil motor to vibrate the feed bin at the first frequency, so that the material in the feed bin is vibrated and loosened and then spread evenly in the feed trough for feeding;

[0064] Step S300: When the ratio of the weight of the fed material to the total weight of the fed material reaches the preset threshold, the inclination angle of the trough is adjusted to the second angle, the outlet of the trough is opened, and the voice coil motor is driven to vibrate the trough at the second frequency to feed the material until the feeding is completed.

[0065] In some implementations, the mass of the counterweight is adjusted according to a first frequency, wherein the counterweight vibrates together with the feed hopper, so that the first frequency is similar to the resonant frequency of the feed hopper. Specifically, the first frequency is determined based on the material characteristics. Before vibrating the feed hopper at the first frequency, a frequency sweep test is performed in advance, and the mass of the counterweight is adjusted according to the resonant frequency calculation formula until the resonant frequency approaches the selected frequency.

[0066] Specifically, in this embodiment, the first frequency for coarse feeding is selected according to preset rules based on different materials. The first frequency f1 is usually in the range of 20-45Hz. For example, if the material has good flowability, the frequency is selected as 30Hz; if the material has poor flowability, the frequency is selected as 20Hz. The stiffness of the second damping spring can be set according to the mass of the first vibrating feeding mechanism (including the mass A1 of the first vibrating plate, the total mass A2 of the counterweight, the mass A3 of the feeding bin, and the total mass A4 of the second damping spring), but there should be an adjustment range so that it can be adjusted for different materials.

[0067] Then, a frequency sweep test was performed. When the driving frequency passed the natural frequency of the first vibrating feeder, a significant peak in the amplitude could be observed. The frequency corresponding to this peak is the resonant frequency. As can be seen from the above formula f1, if f1 is higher than 30Hz, it means that the mass is not large enough, so the mass of the counterweight should be increased; conversely, the mass of the counterweight should be decreased until the selected frequency of 30Hz is approached.

[0068] The optimal frequency for fine feeding is determined by the resonant frequency f2 of the second vibrating feeding mechanism itself, which is a fixed and unchanging inherent property. This is because the amplitude required for vibration to loosen materials with different flowability during coarse feeding is different. After coarse feeding, the material has already been vibrated loosely and evenly into the trough, so there is no need to adjust the frequency of the second vibrating feeding mechanism. It is only necessary to ensure fine feeding through the trough.

[0069] The preferred frequency range for fine feeding is 70-120Hz, so that the fine feeding frequency f2 is much higher than f1, achieving "two-stage tuning" and frequency isolation.

[0070] The stiffness of the third damping spring can be adjusted by... Confirm its size, where, For the quality of the trough, For the quality of the angle sensor, The mass of the second vibrating plate, For the mass of the cylinder, To adjust the mass of the plate, The mass of the electric linear actuator. For the mass of the transmission components, The mass of the drive shaft, For the quality of the bearing, For the quality of the hinges, The mass of the third damping spring.

[0071] The actual resonance frequency of the second vibration feeding mechanism is found through frequency sweep testing, which is the optimal frequency for fine feeding, i.e., the second frequency. At this frequency, the energy consumption of the working system is the lowest, and high-frequency micro-amplitude vibration can be generated, thereby achieving the highest precision feeding control.

[0072] By finding the resonant frequencies of coarse feed and fine feed, the problem of low energy efficiency in the current non-resonant driving mode of the feeding device can be solved.

[0073] After determining the frequencies for coarse and fine feeding, adjust the trough inclination angle to the first angle (e.g., 5°), fully opening the trough outlet. Turn on the voice coil motor and adjust the frequency to f1, causing it to vibrate at low frequency and high amplitude. At this time, the material in the feeding bin will vibrate loosely and spread evenly in the feeding trough, moving forward for coarse feeding. Assuming the total feeding volume is M, when the feeding reaches 0.8M, fine feeding begins. Automatically adjust the trough angle to the second angle (e.g., 1°), adjust the baffle to the top of the V-groove, and change the voice coil motor frequency to f2 for high-frequency, low-amplitude precise feeding (down to the milligram level) until feeding ends, then close the outlet. The preset threshold can be set according to the table below.

[0074]

[0075] The vibration feeding method in this embodiment can switch between coarse feeding mode and fine feeding mode simply by changing the frequency of the voice coil motor. It perfectly balances high efficiency and high precision in a single feeding device, improving the adaptability of the feeding device to different working conditions.

[0076] The above embodiments are not an exhaustive list based on the present invention, and there may be many other embodiments not listed. Any substitutions and improvements made without departing from the concept of the present invention are within the protection scope of the present invention.

Claims

1. A vibrating dosing device based on a voice coil motor, characterized in that The utility model provides a kind of vibrating feeder, including: Support, bottom plate and voice coil motor, the bottom plate is movably mounted on the support, the first end of the voice coil motor is fixed on the support, the second end is fixed on the bottom plate; First vibrating plate and second vibrating plate are equipped above the bottom plate, a plurality of guide rods are equipped on the first vibrating plate and the second vibrating plate, the first end of the guide rod is fixed on the bottom plate, damping spring is equipped between the both ends of the guide rod and the first vibrating plate, between the second vibrating plate; It further includes feeding bin and chute, the feeding bin is installed on the first vibrating plate;The chute is installed on the second vibrating plate, the height of the feed inlet of the chute is greater than the height of the discharge port of the chute, the feed inlet of the chute is matched with the discharge port of the feeding bin; The first vibrating plate and the second vibrating plate are arranged at intervals;The stiffness of the damping spring on the guide rod of the first vibrating plate is less than the stiffness of the damping spring on the guide rod of the second vibrating plate; The bottom plate includes first bottom plate and second bottom plate, the first end of the guide rod on the first vibrating plate is fixed on the first bottom plate, the first end of the guide rod on the second vibrating plate is fixed on the second bottom plate, the bottom of the first bottom plate and second bottom plate is equipped with slide, and slide rail is also equipped, the slide rail is matched with the slide of the second bottom plate and the slide of the first bottom plate and is installed, the first vibrating plate, the first bottom plate and the feeding bin constitute first vibrating feeding mechanism, the second vibrating plate, the second bottom plate and the chute constitute second vibrating feeding mechanism, and through the slide rail, the second vibrating feeding mechanism can be separated from the first vibrating feeding mechanism as a whole; V-shaped groove is equipped on the inner bottom wall of the chute, lifting mechanism is installed on the chute, the lifting mechanism is fixed with baffle, the baffle has first position and second position, in the first position, the bottom end of the baffle is flush with the top end of the V-shaped groove, in the second position, the bottom end of the baffle is higher than the top end of the V-shaped groove; The chute is hinged with the second vibrating plate, the chute is equipped with inclination sensor, and control device and angle adjusting mechanism for adjusting the inclination of the chute are also equipped, and the control device, the inclination sensor and the angle adjusting mechanism are electrically connected.

2. A voice coil motor based vibratory feeder device as claimed in claim 1, wherein, The edges of the first bottom plate and the second bottom plate adjacent to each other are equipped with magnets, and the magnets of the first bottom plate and the magnets of the second bottom plate attract each other.

3. The voice coil motor based vibratory feeder device of claim 1, wherein, Counterweight fixing member is also equipped on the first vibrating plate; And / or, The support is installed on the weighing sensor; And / or, A plurality of guide rods are equipped on the first bottom plate, the first end of the guide rod on the first bottom plate is fixed on the support, and damping spring is equipped between the both ends of the guide rod on the first bottom plate and the first bottom plate.

4. The voice coil motor based vibratory feeder device of claim 1, wherein, The angle adjusting mechanism includes electric push rod, transmission part and limiting part, the transmission part is installed on the output end of the electric push rod, the limiting part is equipped with arc-shaped track, the transmission shaft passing through the arc-shaped track is equipped on the chute, the bearing matched with the arc-shaped track is sleeved on the transmission shaft, and the tail end of the transmission shaft is fixed on the transmission part.

5. A voice coil motor based vibratory feeder device as claimed in claim 4, wherein, The second bottom plate is fixed with a connecting plate, the connecting plate is located above the second bottom plate, the second vibrating plate is fixed on the connecting plate, the limiting piece is installed on the connecting plate, the electric push rod is installed on the second vibrating plate, and the first end of the guide rod of the second vibrating plate is fixed on the connecting plate; And / or, The stiffness of the damping spring on the guide rod of the second vibrating plate is 2-5 times the stiffness of the damping spring on the guide rod of the first vibrating plate.

6. A method of vibrating dosing, characterised in that, Including: Adjust the inclination angle of the trough to a first angle, and the outlet of the trough is fully open; Drive the voice coil motor to vibrate the feeding bin at a first frequency, so that the material in the feeding bin is vibrated and loosened, and then laid flat in the trough for feeding; When the ratio of the given weight to the total feeding weight reaches a preset threshold, adjust the inclination angle of the trough to a second angle, the outlet of the trough is partially open, drive the voice coil motor to vibrate the trough at a second frequency for feeding until the feeding is completed.

7. The method of claim 6, wherein the vibrating the material comprises, The first frequency is determined according to the material characteristics, and before vibrating the feeding bin at the first frequency, a sweep frequency test is also performed in advance, the mass of the counterweight is adjusted according to the formula of the resonance frequency, until the resonance frequency approaches the selected frequency, wherein the counterweight vibrates with the feeding bin.

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