Automatic feeding mechanism of piezoelectric type straight vibrator
By using a piezoelectric vibrator-driven linear conveying structure and a multi-stage screening port design, the problems of low efficiency and poor compatibility of small-sized parts in high-precision equipment are solved, achieving efficient and stable parts conveying and sorting.
Patent Information
- Application Number
- CN202520389068.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-07
- Publication Date
- 2026-01-13
- Estimated Expiration
- 2035-03-07
AI Technical Summary
Existing feeding technologies suffer from low efficiency, uneven speed, significant part waste, and poor compatibility when sorting small-sized parts, especially in high-precision equipment.
The linear conveyor structure is driven by a piezoelectric vibrator and combined with a multi-stage screening port and air blowing seat design. It achieves efficient conveying and screening of small parts through high-frequency vibration and attitude adjustment.
It significantly improves the discharge efficiency and stability of small-sized parts, reduces part waste, and enhances operational convenience and sorting qualification rate.
Smart Images
Figure CN223792327U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of automatic feeding components, and more specifically, to an automatic feeding mechanism for a piezoelectric direct vibrator. Background Technology
[0002] In mass production and sorting processes, vibratory feeders are typically used for loading. However, due to the small size, high volume, and variety of small parts, existing loading technologies present some challenges when used in conjunction with imaging equipment for sorting these parts. For example, when loading small parts onto optical discs, tipping and multiple defective parts at once can occur, affecting the defect rate of small part sorting. Furthermore, the loading speed cannot fully utilize the capabilities of the imaging equipment.
[0003] Specifically, existing feeding technologies have the following shortcomings:
[0004] 1. The original technology's output efficiency could not meet the requirements of high-precision equipment.
[0005] 2. The original linear vibrator had uneven linear speed during operation, which led to multiple parts failing at once, resulting in waste of parts.
[0006] 3. Under the observation of a high-speed camera, the vertical runout tolerance of the feedback linear vibrator at the discharge end is relatively large, and the side-tipping phenomenon of small-sized parts is serious, which further increases the waste of parts.
[0007] 4. The compatibility screening of the raw material tray is achieved by mechanical limiting. Small-sized parts may collide and stop when passing through, which prevents the overall efficiency of the tray from being improved. Utility Model Content
[0008] This utility model discloses an automatic feeding mechanism for a piezoelectric linear vibrator, which aims to solve the problems mentioned above.
[0009] The present invention adopts the following solution:
[0010] An automatic feeding mechanism for a piezoelectric linear vibrator includes: a material tray, a piezoelectric linear vibrator, and a linear conveyor structure. The material tray has a feeding track that spirals upwards around its inner wall. The outlet of the feeding track is connected to the linear conveyor structure to transport parts from the material tray to the linear conveyor structure. The piezoelectric linear vibrator is positioned below the linear conveyor structure and is adapted to drive the linear conveyor structure to vibrate at high frequency, thereby driving the movement of parts on the linear conveyor structure.
[0011] Furthermore, the piezoelectric linear vibrator includes a piezoelectric bicrystalline wafer, a spring assembly, and a matching assembly. The piezoelectric bicrystalline wafer is adapted to be connected to an alternating voltage to generate high-frequency vibration. The vibration is transmitted to the entire piezoelectric linear vibrator through the spring assembly, and then to the linear conveying structure.
[0012] Furthermore, the piezoelectric direct vibrator also includes a counterweight mounting block connected between the piezoelectric bicrystalline wafers to balance the vibration system.
[0013] Furthermore, the feeding track is provided with at least one screening port, and an adjustable air blowing seat is provided at the screening port. The width of the air blowing seat extending out of the screening port can be adjusted to accommodate parts of different thicknesses.
[0014] Furthermore, the air blowing seat is located below the screening port, and the top surface of the air blowing seat is at the same height as the feeding track plane so that the parts can pass through the screening port; when the part's posture meets the requirements, it can pass through the screening port, and when the part's posture does not meet the requirements, it falls from the screening port under the action of gravity.
[0015] Furthermore, at least three screening ports are provided, and each screening port is provided with an air blowing seat.
[0016] Furthermore, the air blowing seat is connected to an adjustment structure, which includes a fixing nut disposed on the outside of the material tray, and the fixing nut is provided with a waist hole; the air blowing seat is bolted to the waist hole of the fixing nut, and the width of the air blowing seat extending out of the screening port is adjusted by sliding the position of the bolt in the waist hole.
[0017] Furthermore, the linear conveying structure has a first material channel section and a second material channel section. The second material channel section has a horizontal conveying surface. The first material channel includes a docking inclined section that connects with the feeding track, and a twisting surface section that connects the docking inclined section with the second material channel. The twisting surface section gradually twists from an inclined surface to a horizontal surface.
[0018] Furthermore, a second screening port is provided at the first material channel, and a second air blowing seat is provided at the second screening port. A cam structure is connected to the second air blowing seat, and an adjusting rod is connected to the cam structure. The width of the second air blowing seat extending out of the second screening port is adjusted by rotating the adjusting rod.
[0019] Furthermore, the second air-blowing seat is provided with an air vent to connect to an air source, which is used to blow parts with incorrect posture away from the second screening port.
[0020] Beneficial effects:
[0021] By employing a piezoelectric direct vibrator to achieve high-frequency vibration, the vertical runout tolerance at the discharge end is reduced, thereby significantly improving discharge efficiency and stability. The discharge efficiency for the same small-sized parts has increased from 450-650 pieces per minute in the original technology to over 1800 pieces per minute. Simultaneously, the multi-track feeding system and air-assisted screening design of the material tray solve the problem of small-sized parts impacting the mechanical screening point in traditional material trays, simplifying the compatibility adjustment structure and improving operational convenience. Attached Figure Description
[0022] Figure 1 This is a schematic diagram of the overall structure of an automatic feeding mechanism for a piezoelectric linear vibrator according to an embodiment of this utility model;
[0023] Figure 2 This is a front view schematic diagram of an automatic feeding mechanism for a piezoelectric linear vibrator according to an embodiment of this utility model;
[0024] Figure 3 This is a schematic diagram of the parts of an automatic feeding mechanism for a piezoelectric linear vibrator according to an embodiment of the present invention, when they enter the linear conveying structure in a suitable posture.
[0025] Figure 4 This is a schematic diagram of a piezoelectric linear vibrator automatic feeding mechanism according to an embodiment of the present invention, showing a part entering a linear conveying structure in an unsuitable posture.
[0026] Figure 5 This is a cross-sectional schematic diagram of the second screening port of an automatic feeding mechanism for a piezoelectric linear vibrator according to an embodiment of this utility model;
[0027] Figure 6 This is a direct view of the feed end of the linear conveying structure of an automatic feeding mechanism for a piezoelectric linear vibrator according to an embodiment of this utility model;
[0028] Figure 7 This is a direct view schematic diagram of the discharge end of the linear conveying structure of an automatic feeding mechanism for a piezoelectric linear vibrator according to an embodiment of this utility model;
[0029] Reference numerals: 1-Platelet; 2-Feeding track; 3-Screening port; 4-Blowing seat; 5-Adjusting structure; 6-Fixing nut; 7-Waist hole; 8-Connecting inclined section; 9-Torsion section; 10-Horizontal conveying surface; 11-Second screening port; 12-Second blowing seat; 13-Cam structure; 14-Adjusting rod; 15-First material channel section; 16-Second material channel section; 17-Piezoelectric bicrystalline wafer; 18-First spring; 19-Second spring; 20-Counterweight mounting block; 21-Straight vibration fixing plate; 22-Base; 24-Blow pipe; 25-Pressure plate; 26-Pad plate; 27-Side plate; 28-Material channel; 29-Electromagnet mounting plate; 30-Straight conveying structure; 31-Piezoelectric straight vibrator; 32-Parts. Detailed Implementation
[0030] Combination Figures 1 to 7 As shown, this embodiment provides an automatic feeding mechanism for a piezoelectric linear vibrator. The mechanism includes a material tray structure, a piezoelectric linear vibrator 31, and a linear conveying structure 30. The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.
[0031] Combination Figures 1 to 3 As shown, the automatic feeding mechanism for the piezoelectric linear vibrator is particularly suitable for the automated production of small-sized parts. First, see... Figure 1 and Figure 2 The material tray 1 solves the problem of small parts colliding at the mechanical screening point, while improving the tray's compatibility and ease of adjustment. A feeding track 2, spiraling upwards around the inner wall of the material tray 1, is protruding from its inner side. The outlet of the feeding track 2 connects to a linear conveyor structure 30, transporting parts from the material tray 1 to the linear conveyor structure 30. Multiple screening ports 3 are provided on the feeding track 2, each equipped with an adjustable air-blowing seat 4. By adjusting the width of the air-blowing seat 4 extending beyond the screening port 3, it can accommodate small parts of varying thicknesses. Specifically, the air-blowing seat 4 is positioned below the screening port 3, with its top surface level with the plane of the feeding track 2, ensuring that small parts can pass through or fall through the screening port 3. Specifically, when the small part's posture meets the requirements, it can pass smoothly through the screening port 3; when the posture does not meet the requirements, because its center of gravity is not on the track, the small part will fall back into the material tray 1 from the screening port 3 under the influence of gravity. To ensure a high screening pass rate, three sets of air blowing seats 4 are installed on the material tray 1 for multi-stage screening. In addition, the air blowing seats 4 are equipped with air blowing holes, which are connected to air pipes. The air pipes are connected to an air source, which is connected to an external flow restrictor and a pressure reducing valve to prevent small parts from being blown out of the material tray 1.
[0032] In this embodiment, the adjustment structure 5 includes a fixing nut 6 located on the outside of the material tray 1, with a waist hole 7 on the fixing nut 6. The air blowing seat 4 is connected to the waist hole 7 of the fixing nut 6 by bolts or screws, and the width of the air blowing seat 4 extending out of the screening port 3 is adjusted by sliding the position of the bolt in the waist hole 7. This design makes the adjustment process simpler, allowing operators to quickly adjust the screening size according to actual needs, thereby adapting to small parts of different thicknesses. The waist hole has a certain width to facilitate adjustment of the extension width of the air blowing seat 4.
[0033] Combination Figure 2 As shown, see below. Figure 3 and Figure 7The piezoelectric linear vibrator 31 drives the linear conveyor structure 30 to vibrate at high frequency, thereby improving discharge efficiency and stability. Specifically, the piezoelectric linear vibrator 31 includes piezoelectric bicrystalline wafers 12, a spring assembly (including a first spring 18 and a second spring 19), and a counterweight assembly (including a counterweight mounting block 20). After the piezoelectric bicrystalline wafers 12 are connected to an alternating voltage, they will generate periodic deformation, i.e., high-frequency vibration. This vibration is transmitted to the entire vibration system, including the linear conveyor structure 30, through the spring assembly. To ensure uniform front and rear speeds of the vibration system, the number of front and rear springs in the spring assembly is determined by a vibration meter. In addition, the piezoelectric linear vibrator 31 also includes a counterweight mounting block 20 connected between the piezoelectric bicrystalline wafers 12 to balance the vibration system and reduce unnecessary vibration or noise. A base 22 and a linear vibrator fixing plate 21 are also provided to provide a fixed foundation for the entire device, ensuring that the vibrator will not move or tilt during operation. Specifically, the piezoelectric bicrystalline wafers 12 are fixed to the base 22 by an electromagnet mounting plate 29. The first spring 18 and the second spring 19 are respectively connected to both sides of the piezoelectric bicrystalline wafer 12 and are transmitted to the feed channel 28 through vibration. In addition, a pressure plate 25 and a pad 26 are provided on the side of the piezoelectric direct vibrator 31 to fix and support the entire vibration system and ensure its stable operation, and a side plate 27 is provided to further enhance the structural stability of the vibration system.
[0034] Combination Figures 1 to 7 As shown, the linear conveyor structure 30 uses a torsion design to automatically change the orientation of small parts during conveying for discharge. The linear conveyor structure 30 has a first material channel section 15 and a second material channel section 16, with the second material channel section 16 configured as a horizontal conveying surface 10. The first material channel section 15 includes a docking inclined section 8 (e.g., inclined at approximately 40°) that connects to the loading track 2, and a torsion surface section 9 that gradually twists the docking inclined section 8 into a horizontal conveying surface 10. This design allows small parts to gradually adjust their posture as they enter the linear conveyor structure 30, ultimately being conveyed horizontally to the optical disc of the customer's image sorting machine. Specifically, a second screening port 11 is provided at the first material channel section 15, and a second air-blowing seat 12 is provided at the second screening port 11. A cam structure 13 is connected to the second air-blowing seat 12, and an adjusting rod 14 is connected to the cam structure 13. By rotating the adjusting rod 14, the second air-blowing seat 12 can be driven to extend beyond the width of the second screening port 11. The second air-blowing seat 12 is provided with an air vent to connect to an air pipe 24. The air pipe 24 is connected to an air source to blow small parts with incorrect posture away from the second screening port 11, thereby further improving the pass rate of the output and reducing the waste of small parts. The second screening port is located on the side of the docking inclined section 8 of the first material channel section 15. When a part 32 with incorrect posture passes through, it will fall back into the material tray from the second screening port 11.
[0035] Specifically, when small parts enter the linear conveyor structure 30 via the loading track 2 of the tray 1, they first enter the first material channel section 15 via the docking inclined section 8. During this process, the small parts are subjected to air blowing from the second air blower 12. Small parts that do not meet the posture requirements are blown away from the second screening port 11 and return to the tray 1. Small parts that meet the posture requirements continue along the docking inclined section 8 into the twisting section 9. In the twisting section 9, the small parts are gradually twisted from the inclined surface to a horizontal posture, and finally conveyed to the optical disc of the customer's image sorting machine via the horizontal conveyor surface 10.
[0036] In this embodiment, the piezoelectric vibrator 31 automatic feeding mechanism can be used for the automated feeding and sorting of small-sized parts. Small-sized parts are conductive components used in electrical components such as relays, and are relatively small in size. During feeding, the small-sized parts enter the material tray 1; a vibrating plate is provided at the bottom of the tray to vibrate the parts 32 inside. During vibration, the small-sized parts can be guided into a preset ascending track through the radius (R) of the material tray 1. The radius (R) of the material tray 1 ensures that the small-sized parts can smoothly enter the track, avoiding the problem of collisions between small-sized parts and mechanical screening points in traditional material trays. The rear end of the rising track is connected to the feeding track 2; small parts gradually rise along the rising track and pass through the multi-stage screening of the feeding track 2; the feeding track 2 is provided with three screening ports 3, and the width of the air blowing seat 4 at each screening port 3 is adjusted according to the thickness of the small parts to ensure that only small parts that meet the posture requirements can pass through the screening port 3, while the remaining small parts fall back to the material tray 1 from the screening port 3 under the action of gravity; by setting the extension width of the air blowing seat 4, it can also be applied to parts 32 of different thicknesses.
[0037] Small parts enter the first material channel section 15 of the linear conveyor structure 30 from the discharge port of the material tray 1 along the feeding track 2. The docking inclined section 8 of the first material channel section 15 docks with the feeding track 2 of the material tray 1, ensuring a smooth transition for the small parts. The small parts continue to advance on the docking inclined section 8, where they are further screened by the air blowing action of the second air blowing seat 12. Small parts that do not meet the posture requirements are blown away from the second screening port 11 and returned to the material tray 1, while small parts that meet the posture requirements continue to advance along the docking inclined section 8. After passing through the docking inclined section 8, the small parts enter the twisting surface section 9. The design of the twisting surface section 9 allows the small parts to gradually twist from the inclined surface to a horizontal posture. Under the action of their own weight, the small parts automatically deviate to one side for discharge, ensuring the smoothness of discharge and the consistency of posture.
[0038] In the torsion section 9, the small-sized parts continue to be driven by the high-frequency vibration of the piezoelectric linear vibrator 31, ensuring their stable movement along the track. The vibration of the piezoelectric linear vibrator 31 is transmitted to the entire vibration system through the spring sheet assembly, enabling the small-sized parts to move quickly and smoothly under high-frequency vibration. After completing the torsion, the small-sized parts enter the second material channel section 16. A horizontal conveying surface 10 is provided in the second material channel section 16 to ensure that the small-sized parts are conveyed horizontally onto the optical disc of the customer's image sorting machine. The high-frequency vibration of the piezoelectric linear vibrator 31 enables the small-sized parts to move quickly and smoothly on the horizontal conveying surface 10, avoiding the vertical jumping problem that occurs when traditional linear vibrators operate at high speeds. Preferably, the number of spring sheets in front and behind the spring sheet assembly, determined by vibration measurement, ensures that the front and rear speeds of the vibration system are uniform, further improving the stability and efficiency of the output.
[0039] Through the above steps, the automatic feeding mechanism of the piezoelectric vibrator 31 of this invention can significantly improve the output efficiency and stability of small-sized parts. Taking small-sized parts with a diameter of 2mm as an example, the output efficiency of the original technology is 450 to 650 pieces per minute, while the output efficiency of this invention can reach more than 1800 pieces per minute. In addition, through the design of the piezoelectric vibrator 31, this invention reduces the vertical runout tolerance at the output end, avoids the tipping of small-sized parts during the conveying process, and further improves the sorting qualification rate. The multi-board feeding track 2 of the material tray 1 and the air-assisted screening design prevent small-sized parts from colliding at the mechanical screening point, simplify the compatibility adjustment structure, and improve the ease of operation.
[0040] It should be understood that the above are only preferred embodiments of the present utility model, and the protection scope of the present utility model is not limited to the above embodiments. All technical solutions that fall within the scope of the present utility model are protected by the present utility model.
[0041] The accompanying drawings used in the above description of the embodiments only show some embodiments of the present invention and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.
Claims
1. An automatic feeding mechanism for a piezoelectric linear vibrator, characterized in that, include: The device comprises a material tray, a piezoelectric vibrator, and a linear conveyor structure. The material tray has a feeding track that spirals upward around its inner wall. The outlet of the feeding track is connected to the linear conveyor structure to transport parts from the material tray to the linear conveyor structure. The piezoelectric vibrator is located below the linear conveyor structure and is adapted to drive the linear conveyor structure to vibrate at high frequency, thereby driving the parts on the linear conveyor structure to move.
2. The automatic feeding mechanism for the piezoelectric linear vibrator according to claim 1, characterized in that, The piezoelectric linear vibrator includes a piezoelectric bicrystalline wafer, a spring assembly, and a supporting assembly. The piezoelectric bicrystalline wafer is adapted to be connected to an alternating voltage to generate high-frequency vibration. The vibration is transmitted to the entire piezoelectric linear vibrator through the spring assembly, and then to the linear conveying structure.
3. The automatic feeding mechanism for the piezoelectric linear vibrator according to claim 2, characterized in that, The piezoelectric direct vibrator also includes a counterweight mounting block connected between the piezoelectric bicrystalline wafers to balance the vibration system.
4. The automatic feeding mechanism for the piezoelectric linear vibrator according to claim 1, characterized in that, The feeding track is provided with at least one screening port, and an adjustable air blowing seat is provided at the screening port. The width of the air blowing seat extending out of the screening port can be adjusted to accommodate parts of different thicknesses.
5. The automatic feeding mechanism for the piezoelectric linear vibrator according to claim 4, characterized in that, The air blowing seat is located below the screening port, and the top surface of the air blowing seat is at the same height as the feeding track plane so that the parts can pass through the screening port; when the part's posture meets the requirements, it can pass through the screening port, and when the part's posture does not meet the requirements, it falls from the screening port under the action of gravity.
6. The automatic feeding mechanism for the piezoelectric linear vibrator according to claim 5, characterized in that, The filter port is provided with at least three, and each filter port is provided with an air blowing seat.
7. The automatic feeding mechanism for the piezoelectric linear vibrator according to claim 6, characterized in that, The air blowing seat is connected to an adjustment structure, which includes a fixing nut disposed on the outside of the material tray, and the fixing nut is provided with a waist hole; the air blowing seat is bolted to the waist hole of the fixing nut, and the width of the air blowing seat extending out of the screening port is adjusted by sliding the position of the bolt in the waist hole.
8. The automatic feeding mechanism for the piezoelectric linear vibrator according to claim 1, characterized in that, The linear conveying structure has a first material channel section and a second material channel section. The second material channel section has a horizontal conveying surface. The first material channel includes a docking inclined section that connects with the feeding track, and a twisting surface section that connects the docking inclined section with the second material channel. The twisting surface section gradually twists from the inclined surface to the horizontal surface.
9. The automatic feeding mechanism for the piezoelectric linear vibrator according to claim 8, characterized in that, A second screening port is provided at the first material channel, and a second air blowing seat is provided at the second screening port. A cam structure is connected to the second air blowing seat, and an adjusting rod is connected to the cam structure. The width of the second air blowing seat extending out of the second screening port is adjusted by rotating the adjusting rod.
10. The automatic feeding mechanism for the piezoelectric linear vibrator according to claim 9, characterized in that, The second air-blowing seat is provided with an air vent to connect to an air source, which is used to blow parts with incorrect posture away from the second screening port.