A carousel screw feeder

Abstract

The utility model discloses a carousel formula screw feeder belongs to screw feeder technical field, including the bunker, the bottom wall of bunker includes the storage area and the discharge area who all are set in the slope shape, the slope bottom of storage area and the slope bottom of discharge area are connected, and the storage area is used for depositing screw, and the discharge area is installed with the distribution carousel, is equipped with the vacuum suction hole of the circumferential arrangement on the distribution carousel, its characterized in that, the agitating mechanism for stirring screw is equipped in the storage area, and the stirring area of agitating mechanism is close to distribution carousel. The agitating mechanism can stir screw, adjust screw posture, cooperate the suction force of vacuum suction hole, make the screw in normal posture in the stirring process can normally enter the vacuum suction hole, and the stirring area of agitating mechanism is close to distribution carousel simultaneously, can remove the abnormal posture screw of the vacuum suction hole block, make normal posture screw can normally enter the vacuum suction hole, improve the device of the rate of going up and putting.

Description

Technical Field

[0001] This utility model relates to the field of screw feeder technology, and in particular to a rotary screw feeder. Background Technology

[0002] Current rotary screw feeders primarily use a rotating feeder to draw screws from a hopper and move them to a designated location. Specifically, screws are stored in the hopper, and to feed them to the feeder, the hopper's bottom wall is typically sloped. The feeder is located at the bottom of this slope and has vacuum suction holes. These holes draw screws from the hopper into the vacuum suction holes. As the feeder rotates, the screws are carried to the discharge area or outlet, where they are removed manually or mechanically. Because of the sloped bottom of the hopper, screws tend to accumulate at the bottom, often resulting in a large number of screws with abnormal orientations. In a normal orientation, the screw's threads typically enter the vacuum suction hole, with the nut protruding. If an abnormally oriented screw blocks the vacuum suction hole, it cannot be removed, preventing the vacuum suction hole from drawing in normally oriented screws. Utility Model Content

[0003] The purpose of this utility model is to solve the above-mentioned technical problems and provide a rotary screw feeder. A stirring mechanism is added to the hopper to stir the screws and adjust their posture. In conjunction with the suction force of the vacuum suction hole, the screws in the normal posture can enter the vacuum suction hole normally during the stirring process. At the same time, the stirring area of ​​the stirring mechanism is close to the distribution turntable, which can remove abnormally oriented screws that block the vacuum suction hole, so that screws in the normal posture can enter the vacuum suction hole normally, thereby improving the screw loading rate.

[0004] To achieve the above objectives, this utility model provides the following solution: This utility model discloses a rotary screw feeder, including a hopper. The bottom wall of the hopper includes a storage area and a discharge area, both of which are sloped. The bottom of the slope of the storage area and the bottom of the slope of the discharge area are connected. The storage area is used to store screws. A distributing turntable is installed in the discharge area. The distributing turntable is provided with vacuum suction holes arranged circumferentially. An agitation mechanism for agitating the screws is provided in the storage area. The agitation area of ​​the agitation mechanism is adjacent to the distributing turntable.

[0005] Preferably, the agitation mechanism includes a rotating block and an actuating element for actuating the screw. The actuating element is circumferentially disposed on the rotating block, and the rotating block is rotatably connected to the storage area. The actuating element is an actuating brush or an actuating roller.

[0006] Preferably, the rotating block is driven by a rotating motor, which is installed below the hopper. The storage area is provided with a through hole, and the motor shaft of the rotating motor passes through the through hole and is fixedly connected to the rotating block.

[0007] Preferably, the agitation mechanism includes an air blowing hole disposed in the discharge zone, and the air blowing hole is connected to a compressed gas supply device.

[0008] Preferably, it also includes a housing, the hopper is installed inside the housing, and the top wall of the housing is provided with a discharge port corresponding to the material distribution turntable.

[0009] Preferably, a pressure roller mechanism is fixedly connected to the outer shell. The pressure roller mechanism includes a pressure roller, a hinge arm, a torsion spring, a hinge shaft, and a positioning post. One end of the hinge arm is hinged to the side wall of the outer shell via the hinge shaft. The pressure roller is hinged to the other end of the hinge arm. The torsion spring is sleeved on the hinge shaft. One torsion arm of the torsion spring is fixed to the positioning post, and the other torsion arm of the torsion spring is fixed to the hinge arm, so as to press the pressure roller tightly onto the material distribution turntable. The pressure roller is located on the rotation path of the vacuum suction hole.

[0010] Preferably, the hopper is installed on the top wall of the outer shell, and an installation cavity is formed between the hopper and the outer shell. A rotating mechanism and an air extraction mechanism are installed in the installation cavity. The rotating mechanism is used to drive the material distribution turntable to rotate. The air extraction mechanism includes a connection port and an air extraction pipe. The connection port is located on the outer shell, and the air extraction pipe corresponds to the lowest point of the material distribution turntable. The air outlet of the air extraction pipe is connected to the connection port, and the air inlet of the air extraction pipe is close to the back of the material distribution turntable. The projection of the air inlet of the air extraction pipe on the back of the material distribution turntable is located on the rotation path of the vacuum suction hole.

[0011] Preferably, the rotating mechanism includes a grooved wheel, a disc wheel, a dial wheel, a gear seat, and a drive motor. The gear seat is mounted on the bottom wall of the housing, the drive motor is mounted on the gear seat, a driving helical gear is fixedly connected to the motor shaft of the drive motor, a driven helical gear is rotatably connected to the gear seat, the driven helical gear meshes with the driving helical gear, the disc wheel is coaxially fixedly connected to the driven helical gear, a semi-circular dial is provided on the disc wheel, the grooved wheel is provided with a semi-circular groove that meshes with the semi-circular dial, the grooved wheel is coaxially fixedly connected to the material distribution turntable, and the number and position of the semi-circular grooves correspond to the vacuum suction holes.

[0012] Preferably, the front of the material distribution turntable is a frustum, and the vacuum suction holes are circumferentially arranged on the side wall of the frustum.

[0013] Preferably, the pressure roller is frustum-shaped, and the sidewall of the pressure roller is attached to the sidewall of the frustum surface of the material distribution turntable.

[0014] The present invention achieves the following technical advantages over the prior art: In this invention, a stirring mechanism is added inside the hopper. This mechanism can stir the screws to adjust their posture. Combined with the suction force of the vacuum suction hole, the screws in the normal posture can enter the vacuum suction hole normally during the stirring process (the screw threads enter the vacuum suction hole, and the nut is outside the vacuum suction hole). At the same time, the stirring area of ​​the stirring mechanism is close to the distribution turntable. On the one hand, this facilitates the timely suction of screws in the normal posture to the distribution turntable. On the other hand, it can also remove screws in abnormal postures that block the vacuum suction hole, so that screws in the normal posture can enter the vacuum suction hole normally, thus improving the screw loading rate. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained by analyzing these drawings without creative effort.

[0016] Figure 1 This is a three-dimensional structural diagram of the rotary screw feeder in an embodiment of the present utility model; Figure 2 This is a top view of the rotary screw feeder in an embodiment of the present invention. Figure 3 This is a three-dimensional structural diagram of the rotary screw feeder (without top cover) in an embodiment of the present utility model; Figure 4 This is a front view structural schematic diagram of the rotary screw feeder (without sidewall on one side) in an embodiment of this utility model; Figure 5 This is a schematic diagram of the internal structure of the rotary screw feeder on the right rear side in an embodiment of this utility model. Figure 6 This is a top view schematic diagram of the internal structure of the rotary screw feeder in this embodiment of the present invention; Figure 7 This is a schematic diagram of the three-dimensional structure of the rotary screw feeder from the left rear in an embodiment of this utility model. Figure 8 This is a schematic diagram of the internal structure of the rotary screw feeder from the left side view in an embodiment of this utility model; Figure 9 This is a rear view schematic diagram of the rotary screw feeder in an embodiment of this utility model; Figure 10 This is a top view of the left rear interior structure of the rotary screw feeder in this embodiment of the present invention; Figure 11This is a three-dimensional structural diagram of the rotating mechanism of the rotary screw feeder in an embodiment of this utility model; Figure 12 This is a front view schematic diagram of the rotating mechanism of the rotary screw feeder in an embodiment of this utility model.

[0017] Explanation of reference numerals in the attached drawings: 1. Outer shell; 2. Hopper; 3. Distributor turntable; 4. Discharge port; 5. Switch; 6. Connection port; 7. Divider plate; 8. Vacuum suction hole; 9. Rotating block; 10. Actuating brush; 11. Rotating motor; 12. Pressure roller; 13. Hinge arm; 14. Torsion spring; 15. Hinge shaft; 16. Positioning pin; 17. Grooved wheel; 18. Disc wheel; 19. Dial wheel; 20. Gear seat; 21. Drive motor; 22. Drive helical gear; 23. Driven helical gear; 24. Semi-circular dial; 25. Semi-circular groove; 26. Air extraction pipe. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments analyzed and obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0019] The purpose of this invention is to provide a rotary screw feeder to solve the problems existing in the prior art. A stirring mechanism is added to the hopper to stir the screws and adjust their posture. In conjunction with the suction force of the vacuum suction hole, the screws in the normal posture can enter the vacuum suction hole normally during the stirring process (the screw threads enter the vacuum suction hole, and the screw cap is outside the vacuum suction hole). At the same time, the stirring area of ​​the stirring mechanism is close to the distribution turntable. On the one hand, it is beneficial for the screws in the normal posture to be sucked into the distribution turntable in a timely manner. On the other hand, it can also remove the abnormal posture screws that block the vacuum suction hole, so that the screws in the normal posture can enter the vacuum suction hole normally, thereby improving the screw loading rate.

[0020] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0021] like Figures 1 to 12As shown, this embodiment provides a rotary screw feeder, including a hopper 2. The bottom wall of the hopper 2 includes a storage area and a discharge area. Both the storage area and the discharge area are sloped, with the bottom of the slope of the storage area connected to the bottom of the slope of the discharge area, meaning that the storage area and the discharge area are inclined towards each other. The storage area is used to store screws. After screws are placed in the storage area, they slide down the slope and accumulate near the junction of the storage area and the discharge area. A distribution turntable 3 is installed in the discharge area to receive the screws in the storage area. The distribution turntable 3 is provided with vacuum suction holes 8, which are arranged along the circumference of the distribution turntable 3. Preferably, the surface of the distribution turntable 3 is parallel to the discharge area. An agitation mechanism is provided in the storage area to agitate the screws and adjust their posture. In conjunction with the suction force of the vacuum suction holes 8, the screws in their normal posture during agitation can enter the vacuum suction holes 8 normally (the screw threads enter the vacuum suction holes 8, and the screw caps are outside the vacuum suction holes 8). The stirring area of ​​the stirring mechanism is close to the material distribution turntable 3, which can remove abnormally oriented screws that block the vacuum suction hole 8, allowing screws with normal orientation to enter the vacuum suction hole 8 normally.

[0022] Working principle: First, store the screws in hopper 2; Then, start the material distribution turntable 3 and the stirring mechanism. The stirring mechanism stirs the screws in the hopper 2. When the material distribution turntable 3 rotates, each time the vacuum suction hole 8 rotates to the bottom point, the screw will be sucked into the vacuum suction hole 8 under the action of vacuum negative pressure. The normal posture is that the screw thread enters the vacuum suction hole 8 and the nut part is located outside the disc surface of the material distribution turntable 3. Under the stirring of the screw, the posture of the screw can be adjusted to facilitate the screw to enter the vacuum suction hole 8 better. Adjusting different stirring delays controls the stirring time. It can also remove abnormal posture screws that block the vacuum suction hole 8, so that the normal posture screws can enter the vacuum suction hole 8 normally. Then, the screws that have entered the vacuum suction hole 8 are driven to the picking position by the rotation of the material distribution turntable 3, and the screws are picked up manually or mechanically from the picking position.

[0023] In one embodiment, the distance between the agitation zone and the lowest point of the distribution turntable 3 should be equal to or greater than, but close to, the thickness of a screw nut. This allows screws with abnormal postures that are blocking the vacuum suction hole 8 to be removed, enabling screws with normal postures to enter the vacuum suction hole 8 normally.

[0024] In one embodiment, the agitation mechanism includes a rotating block 9 and a agitator, the rotating block 9 being rotatably connected to the storage area. The agitator is circumferentially disposed on the rotating block 9, and as the rotating block 9 rotates, it forms an agitation zone within the storage area for agitating the screw. As the rotating block 9 rotates, it continuously agitates the screw, creating an agitation effect. The agitation time can be controlled by adjusting different agitation delays of the rotating block 9. The agitator can be an agitator brush 10 or an agitator roller, etc. Preferably, an agitator brush 10 is used, which can both agitate the screw and sweep away screws with abnormal postures that are blocking the vacuum suction hole 8.

[0025] The number of actuating components can be set as needed, such as setting three rows of actuating brushes 10, which are arranged circumferentially on the rotating block 9. Of course, four or more rows can also be set. Preferably, in a single row of actuating brushes 10, the length of the actuating brushes 10 can be equal, or the length of the actuating brushes 10 can gradually increase from the distance away from the storage area (top) to the distance near the storage area (bottom).

[0026] In one embodiment, the rotating block 9 is driven by a rotating motor 11. Specifically, the rotating motor 11 is installed below the hopper 2, and a through hole is provided in the storage area. The motor shaft of the rotating motor 11 passes through the through hole, and then the motor shaft of the rotating motor 11 is fixedly connected to the rotating block 9. When the motor shaft of the rotating motor 11 is started, it can drive the rotating block 9 to rotate, thereby actuating the screw.

[0027] In one embodiment, the agitation mechanism can also employ other methods, such as air agitation. Specifically, the agitation mechanism includes multiple air holes disposed within the storage area, and these air holes are connected to a compressed gas supply device. Compressed gas is supplied to the air holes via the compressed gas supply device to agitate the screws within the storage area, thereby achieving the agitation purpose. The diameter of the air holes must be smaller than the outer diameter of the screw threads to prevent the screws from getting stuck inside the air holes.

[0028] In one embodiment, the system further includes a housing 1, with a hopper 2 installed inside. The top wall of the housing 1 has a discharge port 4 (serving as a material retrieval point), located above and corresponding to the distribution turntable 3, preferably at the rotational apex of the distribution turntable 3. When the vacuum suction hole 8 rotates to its bottom point, it sucks in a screw. Then, as the distribution turntable 3 rotates, upon reaching its apex, it corresponds to the discharge port 4. The screw can then be mechanically or manually retrieved from the vacuum suction hole 8 at the apex. The timing of material retrieval needs to be coordinated with the rotation interval of the distribution turntable 3. The time interval between each rotation of the distribution turntable 3 must cover the time required for a single retrieval from the vacuum suction hole 8.

[0029] In one embodiment, the outer shell 1 is provided with a partition plate 7, which divides the material distribution turntable 3 of the material discharge area of ​​the hopper 2 into an upper part and a lower part. The upper part is the material pick-up position, corresponding to the material discharge port 4.

[0030] In one embodiment, a pressure roller mechanism is fixedly connected to the outer casing 1. The pressure roller mechanism includes a pressure roller 12, a hinge arm 13, a torsion spring 14, a hinge shaft 15, and a positioning post 16. One end of the hinge arm 13 is hinged to the side wall of the outer casing 1 via the hinge shaft 15, and the pressure roller 12 is hinged to the other end of the hinge arm 13. The torsion spring 14 is sleeved on the hinge shaft 15. One torsion arm of the torsion spring 14 is fixed to the positioning post 16, and the other torsion arm of the torsion spring 14 is fixed to the hinge arm 13, so as to press the pressure roller 12 tightly onto the material distribution turntable 3. The pressure roller 12 is located on the rotation path of the vacuum suction hole 8. During the rotation of the material distribution turntable 3, the vacuum suction hole 8 passes through the pressure roller 12. The pressure roller 12 ensures that the screws completely enter the vacuum suction hole 8 and removes excess adhered screws from the turntable.

[0031] In one embodiment, the hopper 2 is mounted on the top wall of the outer casing 1, forming an installation cavity between the hopper 2 and the outer casing 1. A rotating mechanism and a vacuuming mechanism are installed within the installation cavity. The rotating mechanism drives the distributing turntable 3 to rotate. The vacuuming mechanism includes a connection port 6 and a vacuum pipe 26. The connection port 6 is located on the outer casing 1, and the vacuum pipe 26 corresponds to the lowest point of the distributing turntable 3. The outlet end of the vacuum pipe 26 is connected to the connection port 6, which is used to connect to a vacuuming device, such as a vacuum pump. The inlet end of the vacuum pipe 26 is close to the back side of the distributing turntable 3 (the side facing away from the storage area). The projection of the inlet end of the vacuum pipe 26 on the back side of the distributing turntable 3 lies on the rotation path of the vacuum suction holes 8. During the rotation of the distributing turntable 3, the vacuum suction holes 8 rotate accordingly, one by one corresponding to the inlet end of the vacuum pipe 26.

[0032] In one embodiment, the vacuum suction hole 8 is a tapered hole. The end of the vacuum suction hole 8 located on the front of the material distribution turntable 3 is the small-diameter end, with a diameter larger than the outer diameter of the screw thread but smaller than the diameter of the nut. The end of the vacuum suction hole 8 located on the front of the material distribution turntable 3 (facing the storage area) is the large-diameter end, with a diameter smaller than or equal to the diameter of the suction pipe 26. By evacuating air from the large-diameter end of the vacuum suction hole 8 through the suction pipe 26, a negative pressure can be created at the small-diameter end of the vacuum suction hole 8, drawing in the screw thread. Of course, the suction pipe 26 does not necessarily have to correspond to the lowest point of the material distribution turntable 3; its position can be adjusted as needed.

[0033] In one embodiment, the rotating mechanism includes a grooved wheel 17, a disc wheel 18, a dial wheel 19, a gear seat 20, and a drive motor 21. The gear seat 20 is mounted on the bottom wall of the housing 1, and the drive motor 21 is mounted on the gear seat 20. A drive helical gear 22 is fixedly connected to the motor shaft of the drive motor 21. A driven helical gear 23 is rotatably connected to the gear seat 20, and the driven helical gear 23 meshes with the drive helical gear 22. Preferably, the motor shaft of the drive motor 21 is parallel to the bottom wall of the housing 1. The disc wheel 18 is coaxially fixedly connected to the driven helical gear 23, and a semi-circular dial 24 is provided on the disc wheel 18. The grooved wheel 17 is provided with a semi-circular groove 25 that meshes with the semi-circular dial 24. The grooved wheel 17 is coaxially fixedly connected to the material distribution turntable 3, and the number and position of the semi-circular grooves 25 correspond to the vacuum suction holes 8. Preferably, there are twelve vacuum suction holes 8, and correspondingly twelve semi-circular grooves 25 on the grooved wheel 17. Each rotation of the semi-circular lever 24 causes the grooved wheel 17 to rotate 1 / 12 of a turn. At this time, the vacuum suction hole 8 at the lowest point of the material distribution turntable 3 rotates one notch upwards. Under the action of the semi-circular lever 24, the grooved wheel 17, which engages with the semi-circular lever 24, will be locked after each rotation. Preferably, a wheel origin sensor can be provided to ensure that the semi-circular lever 24 remains in the same position.

[0034] In one embodiment, the front of the material distribution turntable 3 is a frustum, and the vacuum suction holes 8 are arranged circumferentially on the side wall of the frustum.

[0035] In one embodiment, the pressure roller 12 is frustum-shaped, and the sidewall of the pressure roller 12 is attached to the sidewall of the frustum surface of the material distribution turntable 3.

[0036] In one embodiment, the housing 1 is provided with a switch 5 for starting the rotary motor 21 and the drive motor 11.

[0037] This utility model uses specific examples to illustrate its principles and implementation methods. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the idea of ​​this utility model. In summary, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A rotary screw feeder, comprising a hopper, the bottom wall of which includes a storage area and a discharge area, both sloping, the bottom of the storage area and the bottom of the discharge area being connected, the storage area for storing screws, and a distributing rotary table installed in the discharge area, the distributing rotary table having vacuum suction holes arranged circumferentially, characterized in that, The storage area is equipped with a stirring mechanism for agitating the screws, and the stirring area of ​​the stirring mechanism is adjacent to the material distribution turntable.

2. The rotary screw feeder according to claim 1, characterized in that, The agitation mechanism includes a rotating block and a turning element for turning the screw. The turning element is circumferentially disposed on the rotating block, and the rotating block is rotatably connected to the storage area. The turning element is a turning brush or a turning roller.

3. The rotary screw feeder according to claim 2, characterized in that, The rotating block is driven by a rotating motor, which is installed below the hopper. The storage area is provided with a through hole, through which the motor shaft of the rotating motor passes and is fixedly connected to the rotating block.

4. The rotary screw feeder according to claim 1, characterized in that, The agitation mechanism includes an air blowing hole located in the discharge zone, and the air blowing hole is connected to a compressed gas supply device.

5. The rotary screw feeder according to claim 1, characterized in that, It also includes a housing, the hopper is installed inside the housing, and the top wall of the housing is provided with a discharge port corresponding to the material distribution turntable.

6. The rotary screw feeder according to claim 5, characterized in that, A pressure roller mechanism is fixedly connected to the outer shell. The pressure roller mechanism includes a pressure roller, a hinge arm, a torsion spring, a hinge shaft, and a positioning post. One end of the hinge arm is hinged to the side wall of the outer shell through the hinge shaft. The pressure roller is hinged to the other end of the hinge arm. The torsion spring is sleeved on the hinge shaft. One torsion arm of the torsion spring is fixed to the positioning post, and the other torsion arm of the torsion spring is fixed to the hinge arm to press the pressure roller tightly onto the material distribution turntable. The pressure roller is located on the rotation path of the vacuum suction hole.

7. The rotary screw feeder according to claim 6, characterized in that, The hopper is installed on the top wall of the outer shell, and an installation cavity is formed between the hopper and the outer shell. A rotating mechanism and an air extraction mechanism are installed in the installation cavity. The rotating mechanism is used to drive the material distribution turntable to rotate. The air extraction mechanism includes a connection port and an air extraction pipe. The connection port is located on the outer shell, and the air extraction pipe corresponds to the lowest point of the material distribution turntable. The air outlet of the air extraction pipe is connected to the connection port, and the air inlet of the air extraction pipe is close to the back of the material distribution turntable. The projection of the air inlet of the air extraction pipe on the back of the material distribution turntable is located on the rotation path of the vacuum suction hole.

8. The rotary screw feeder according to claim 7, characterized in that, The rotating mechanism includes a grooved wheel, a disc wheel, a dial wheel, a gear seat, and a drive motor. The gear seat is mounted on the bottom wall of the housing, and the drive motor is mounted on the gear seat. A driving helical gear is fixedly connected to the motor shaft of the drive motor, and a driven helical gear is rotatably connected to the gear seat. The driven helical gear meshes with the driving helical gear. The disc wheel is coaxially fixedly connected to the driven helical gear. A semi-circular dial block is provided on the disc wheel, and a semi-circular groove is provided on the grooved wheel to mesh with the semi-circular dial block. The grooved wheel is coaxially fixedly connected to the material distribution turntable, and the number and position of the semi-circular grooves correspond to the vacuum suction holes.

9. The rotary screw feeder according to claim 8, characterized in that, The front of the material distribution turntable is a frustum, and the vacuum suction holes are circumferentially arranged on the side wall of the frustum.

10. The rotary screw feeder according to claim 9, characterized in that, The pressure roller is frustum-shaped, and its sidewall is attached to the sidewall of the frustum surface of the material distribution turntable.

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