Screw feeding equipment

Abstract

The utility model relates to the technical field of automatic assembly, and discloses screw feeding equipment which comprises a feeding table, and a feeding mechanism is arranged at the top of the feeding table. According to the screw feeding equipment, the spiral track of the vibration feeding disc is internally provided with three stages of acceleration tracks, the first stage is a spiral climbing section, the second stage is a screening section, the third stage is a directional arrangement section, and a driving device is matched to drive a sorting mechanism to intermittently rotate, so that one sorting position of the sorting mechanism is aligned with a positioning groove; the screws automatically fall into the sorting mechanism, an infrared transmitter in the sensor assembly is matched to judge the direction by comparing the reflected light intensity difference of the screw heads and the threaded parts, and when the deviation exceeds a set threshold value, the pushing device is triggered and driven to push out the screws at the corresponding positions, so that the sorting process is completed. And finally, the screw is taken out for feeding in cooperation with the movable clamping mechanism, so that the surface damage of the screw can be reduced, the feeding quality is improved, the feeding precision is improved, and the stability is remarkably improved.

Description

Technical Field

[0001] This utility model belongs to the field of automated assembly technology, and in particular relates to a screw feeding device. Background Technology

[0002] Automated assembly technology is increasingly widely used in industrial production. Screws, as common fasteners, have their feeding efficiency directly impacting overall assembly speed. Currently, the demand for automated screw feeding equipment continues to grow in industries such as electronics and automotive; however, existing equipment still has shortcomings in terms of feeding accuracy, stability, and compatibility.

[0003] A prior patent (publication number: CN114981189B) discloses a screw feeding device for a screw feeder, comprising a base plate, a vibration mechanism, and a guide rail. The vibration mechanism includes at least one spring and a vibration motor connected to the at least one spring. The guide rail is used to receive screws and is connected to a first end of the at least one spring, which is arranged at an inclined angle to the guide rail. The screw feeding device further includes a fastening mechanism for rigidly connecting a second end of the at least one spring to the base plate.

[0004] Existing screw feeding equipment mainly includes three methods: vibratory feeder feeding, belt conveyor, and pneumatic feeding. Vibratory feeder feeding uses electromagnetic vibration to orient the screws, but it is noisy and easily causes wear on the screw surface. Belt conveyor is suitable for long-distance feeding, but its accuracy is low and it is prone to jamming. Pneumatic feeding uses airflow to push the screws, which is fast but energy-intensive and has poor adaptability to screw size. In addition, some equipment uses mechanical grippers for sorting, which has high accuracy but complex structure and high maintenance cost. Therefore, a screw feeding device is proposed to solve the above problems. Utility Model Content

[0005] To address the shortcomings of existing technologies, this application provides a screw feeding device that has advantages such as reducing screw surface damage, improving feeding quality and accuracy, and significantly enhancing stability. It solves the problems mentioned in the aforementioned comparative documents, such as the high noise and easy wear on screw surfaces caused by electromagnetic vibration in the vibratory feeder feeding, and the high accuracy but complex structure and high maintenance cost of some mechanical grippers for sorting.

[0006] To achieve the above objectives, this application provides the following technical solution: a screw feeding device, including a feeding platform, a feeding mechanism on the top of the feeding platform, a driving device inside the feeding platform, a sorting mechanism engaged on one side of the driving device, the top of the sorting mechanism extending to the top of the feeding platform, a sensor on the top of the sorting mechanism, a pushing device inside the feeding platform, a fixed frame fixedly installed on the top of the feeding platform, a second driving device on the fixed frame, and a movable clamping mechanism threadedly connected to the output end of the second driving device;

[0007] The feeding mechanism includes a vibrating feeding plate, the inside of which is provided with a spiral track, the outer surface of which is provided with a feeding guide groove, and the bottom of which is provided with a positioning groove.

[0008] The above scheme places the sorting mechanism at the discharge end of the feeding mechanism. When the vibrating feeder is started, the screws inside climb up the bottom spiral track. The spiral track of the vibrating feeder is set into a three-stage acceleration track: the first stage is the spiral climbing section, the second stage is the screening section, and the third stage is the directional arrangement section. The drive device drives the sorting mechanism to rotate intermittently so that one of the sorting positions is aligned with the positioning slot, so that the screws automatically fall into the sorting mechanism. The infrared emitter in the sensor assembly determines the direction by comparing the difference in reflected light intensity between the screw head and the thread. When the deviation exceeds the set threshold, the drive push device is triggered to push out the screw at the corresponding position to complete the sorting process. Finally, the moving clamping mechanism takes it out for feeding. This reduces damage to the screw surface, improves feeding quality and accuracy, and significantly enhances stability.

[0009] Furthermore, the driving device includes a drive motor, a first gear is fixedly mounted on the output end of the drive motor, a second gear meshes with one side of the first gear, the first gear is an incomplete gear, and the second gear meshes with the sorting mechanism.

[0010] The above scheme involves starting the drive motor to drive the first gear to rotate, so that the incomplete first gear can drive the second gear to rotate, thereby providing intermittent operating driving force for the sorting mechanism.

[0011] Furthermore, the sorting mechanism includes a sorting tray, a main shaft is fixedly installed at the bottom of the sorting tray, a third gear is fixedly connected to one end of the main shaft, and a conical sorting groove is provided at the top of the sorting tray.

[0012] The above scheme uses a drive motor to drive the first gear to rotate, which in turn drives the second gear to drive the third gear to rotate. When the first gear rotates one revolution, it indirectly drives the third gear to rotate at a certain angle, so that the top main shaft drives the sorting tray to rotate. The conical sorting groove at the top advances sequentially to the bottom of the positioning groove, so that the screws automatically fall into the inside of the conical sorting groove. This allows the screws to be sorted and transported accurately, and reduces friction damage between the screws and external devices during the transport process.

[0013] Furthermore, the number of the conical sorting troughs is set to several, and the several conical sorting troughs are evenly distributed on the top of the sorting tray, and one of the conical sorting troughs is coaxially arranged with the feeding guide trough.

[0014] The above scheme, by setting up several conical sorting slots in conjunction with the intermittent rotation of the sorting disc, enables the sorting disc to continuously and accurately sort screws, thereby improving the efficiency of screw sorting and feeding.

[0015] Furthermore, the pushing device includes an electromagnet block, and an electromagnetic pushing rod is provided at the output end of the electromagnet block. The top end of the electromagnetic pushing rod extends to the bottom of the conical sorting groove.

[0016] With the above scheme, since the sensor consists of an infrared transmitter and a receiver, it determines the direction by comparing the difference in reflected light intensity between the screw head and the threaded part. When the deviation exceeds the set threshold, it triggers the electromagnetic push rod at the end of the electromagnet block to remove the screw inside the corresponding conical sorting groove above, so as to prepare for subsequent clamping and feeding.

[0017] Furthermore, the second driving device includes a servo motor, the output end of which is fixedly mounted with a threaded shaft, and the movable clamping mechanism includes a movable ball screw with a pneumatic gripper at its bottom, and the threaded shaft is located on the inner wall of the fixed frame.

[0018] With the above scheme, when the electromagnetic push rod is triggered to push out the screw inside the corresponding conical sorting groove, the servo motor receives a pulse signal and drives the moving ball screw to move linearly along the outside of its threaded shaft until the pneumatic gripper is driven to the screw ejection position and starts the gripping action to grab it, thereby completing the screw grabbing process and completing the accurate gripping and feeding process of the screw. The pneumatic gripper has an integrated force sensor at the end, which feeds back the tightening torque to the PLC control system in real time.

[0019] Furthermore, a sliding block is fixedly installed on the top of the movable ball screw, a limit rod is fixedly installed on the inner wall of the fixed frame, and the sliding block is slidably connected to the outside of the limit rod.

[0020] With the above solution, by setting the sliding block, when the moving ball screw moves, it drives the top sliding block to slide and displace outside the limit rod together. During its movement, the limiting effect is increased while the connection strength of the moving ball screw is enhanced, so that the pneumatic gripper at the bottom can maintain a stable gripping state during the feeding process.

[0021] Furthermore, the outer surface of the feeding guide groove is provided with an inclined guide groove, and the output end of the inclined guide groove extends to the inner wall of the positioning groove.

[0022] The above solution, through the setting of the inclined guide groove, enables the smooth inner surface of its inner wall to accurately transport the screws arranged on the inner wall of the feeding guide groove to the inside of the positioning groove, so as to prevent the screws from shifting in position during the transmission process.

[0023] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0024] This screw feeding device places the sorting mechanism at the discharge end of the feeding mechanism. When the vibrating feeding disc is started, the screws inside climb up the bottom spiral track. The spiral track of the vibrating feeding disc is set into a three-stage acceleration track: the first stage is the spiral climbing section, the second stage is the screening section, and the third stage is the directional arrangement section. The drive device drives the sorting mechanism to rotate intermittently so that one of the sorting positions is aligned with the positioning groove, so that the screw automatically falls into the sorting mechanism. The infrared emitter in the sensor assembly determines the direction by comparing the difference in reflected light intensity between the screw head and the thread. When the deviation exceeds the set threshold, the drive push device is triggered to push out the screw at the corresponding position to complete the sorting process. Finally, the moving clamping mechanism takes it out for feeding. This can reduce screw surface damage, improve feeding quality and feeding accuracy, and significantly improve stability. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0026] Figure 2 This is an overall structural diagram of the vibrating sorting disc of this utility model;

[0027] Figure 3 This is a schematic diagram of the drive device of this utility model;

[0028] Figure 4 This is a schematic diagram of the structure of the third gear of this utility model;

[0029] Figure 5 This utility model Figure 3 Enlarged structural diagram at point A in the middle.

[0030] The markings in the diagram are as follows: 1. Feeding table; 2. Feeding mechanism; 3. Drive device; 4. Sorting mechanism; 5. Sensor; 6. Pushing device; 7. Fixing frame; 8. Second drive device; 9. Moving clamping mechanism; 201. Vibrating feeder; 202. Spiral track; 203. Feeding guide chute; 204. Positioning groove; 301. Drive motor; 302. First gear; 303. Second gear; 401. Sorting tray; 402. Main shaft; 403. Third gear; 404. Conical sorting chute; 601. Electromagnetic block; 602. Electromagnetic push rod; 801. Servo motor; 802. Threaded shaft; 901. Moving ball screw; 902. Pneumatic gripper; 903. Sliding block; 10. Limiting rod; 205. Inclined guide chute. Detailed Implementation

[0031] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0032] Please see Figure 1 A screw feeding device in this embodiment includes a feeding platform 1, a feeding mechanism 2 on the top of the feeding platform 1, a driving device 3 inside the feeding platform 1, a sorting mechanism 4 engaged on one side of the driving device 3, the top of the sorting mechanism 4 extending to the top of the feeding platform 1, a sensor 5 on the top of the sorting mechanism 4, a pushing device 6 inside the feeding platform 1, a fixed frame 7 fixedly installed on the top of the feeding platform 1, a second driving device 8 on the fixed frame 7, and a movable clamping mechanism 9 threadedly connected to the output end of the second driving device 8.

[0033] The feeding mechanism 2 includes a vibrating feeding plate 201, with a spiral track 202 inside the vibrating feeding plate 201 and a feeding guide groove 203 on the outer surface of the vibrating feeding plate 201. A positioning groove 204 is provided at the bottom of the feeding guide groove 203. By placing the sorting mechanism 4 at the discharge end of the feeding mechanism 2, when the vibrating feeding plate 201 is started, the screws inside it climb up through the bottom spiral track. The spiral track 202 of the vibrating feeding plate 201 is set as a three-stage acceleration track: the first stage is a spiral climbing section, the second stage is a screening section, and the third stage is a directional arrangement. The process involves a segment where the drive device 3 drives the sorting mechanism 4 to rotate intermittently, aligning one of its sorting positions with the positioning slot 204. This causes the screw to automatically fall into the sorting mechanism 4. The infrared emitter in the sensor 5 component compares the intensity difference between the reflected light from the screw head and the threaded part to determine the direction. When the deviation exceeds a set threshold, the drive pushing device 6 is triggered to push out the screw at the corresponding position, thus completing the sorting process. Finally, the screw is removed by the moving clamping mechanism 9 for feeding. This reduces damage to the screw surface, improves feeding quality and accuracy, and significantly enhances stability.

[0034] Please see Figure 2 , Figure 3 and Figure 4 The sorting mechanism 4 includes a sorting tray 401. A main shaft 402 is fixedly installed at the bottom of the sorting tray 401. A third gear 403 is fixedly connected to one end of the main shaft 402. A conical sorting groove 404 is provided at the top of the sorting tray 401. The first gear 302 is driven to rotate by the drive motor 301, and then the second gear 303 drives the third gear 403 to rotate. Thus, when the first gear 302 rotates one revolution, it indirectly drives the third gear 403 to rotate a certain angle, so that the main shaft 402 at the top drives the sorting tray 401 to rotate. The conical sorting groove 404 at the top advances to the bottom of the positioning groove 204, so that the screws automatically fall into the interior of the conical sorting groove 404. This enables the screws to be sorted and conveyed accurately, and reduces the friction damage between the screws and external devices during the conveying process.

[0035] Please see Figure 3 and Figure 4 The pushing device 6 includes an electromagnet block 601, and an electromagnetic pushing rod 602 is provided at the output end of the electromagnet block 601. The top end of the electromagnetic pushing rod 602 extends to the bottom of the conical sorting groove 404. Since the sensor 5 consists of an infrared transmitter and a receiver, it determines the direction by comparing the intensity difference of reflected light between the screw head and the threaded part. When the deviation exceeds the set threshold, the electromagnetic pushing rod 602 at the end of the electromagnet block 601 is triggered to remove the screw inside the corresponding conical sorting groove 404 above, so as to prepare for subsequent clamping and feeding.

[0036] Please see Figure 3 and Figure 5The second drive device 8 includes a servo motor 801, and a threaded shaft 802 is fixedly installed at the output end of the servo motor 801. The moving clamping mechanism 9 includes a moving ball screw 901, and a pneumatic gripper 902 is provided at the bottom of the moving ball screw 901. The threaded shaft 802 is located on the inner wall of the fixed frame 7. When the electromagnetic push rod 602 is triggered to push out the screw inside the corresponding conical sorting groove 404, the servo motor 801 receives a pulse signal and drives the moving ball screw 901 to move linearly along the outside of its threaded shaft 802 until the pneumatic gripper 902 is driven to move to the screw ejection position and then starts the gripping action to grab it, thereby completing the screw grabbing process and completing the accurate gripping and feeding process of the screw. The pneumatic gripper 902 integrates a force sensor at its end to provide real-time feedback of the tightening torque to the PLC control system.

[0037] In this embodiment, a screw feeding device is provided. A sorting disc 401 is placed at the discharge end of a vibrating feeding disc 201. When the vibrating feeding disc 201 is activated, the screws inside climb along a bottom spiral track. A three-stage acceleration track automatically sorts and arranges the screws. A drive motor 301, in conjunction with the first gear 302 and the second gear 303, provides intermittent rotational driving force to the sorting disc 401. This drives the sorting disc 401, along with several evenly distributed conical sorting grooves 404 on its top, to sequentially advance below the positioning groove 204, causing the screws to automatically fall into the conical sorting grooves 404. This allows the screws to... The screws are precisely sorted and conveyed, reducing frictional damage between the screws and external devices during the conveying process. The infrared emitter in sensor 5 determines the direction by comparing the intensity difference of reflected light between the screw head and the threaded part above the sorting tray 401, thereby driving the electromagnetic push rod 602 to remove the screws inside the corresponding conical sorting groove 404 above, achieving a precise push and discharge effect. At the same time, it enables the servo motor 801 to receive pulse signals, providing displacement driving force for the pneumatic gripper 902 to grasp the screws and complete the accurate grasping and feeding process. This combination enables continuous and precise sorting of screws, thereby improving the efficiency of screw sorting and feeding.

[0038] It should be noted that...

[0039] The working principle of the above embodiments is as follows:

[0040] When the vibrating feeder 201 is started, the screws inside it climb up through the bottom spiral track. The spiral track 202 of the vibrating feeder 201 is designed as a three-stage acceleration track: the first stage is a spiral climbing section, the second stage is a screening section, and the third stage is a directional arrangement section. When the screws enter the third stage (directional arrangement section), they gradually enter the feeding guide trough 203 and, in conjunction with the positioning groove 204, are accurately conveyed into the conical sorting groove 404. The drive motor 301 is started, causing it to drive the first gear 302 to rotate, allowing the partially rotated first gear 302 to drive the second gear 303. After the first gear 302 rotates one revolution, it indirectly drives the third gear 403 to rotate by a certain angle, causing the top main shaft 402 to drive the sorting disc 401 to rotate. The top conical sorting groove 404 then sequentially advances to the positioning groove. Below 204, the screw automatically falls into the conical sorting groove 404. After the sorting tray 401 continues to rotate, the conical sorting groove 404 containing the sorted screws moves to the corresponding position of the electromagnetic push rod 602. The infrared transmitter determines the direction by comparing the difference in reflected light intensity between the screw head and the threaded part. When the deviation exceeds the set threshold, the electromagnetic push rod 602 at the end of the electromagnet block 601 is triggered to remove the screw inside the corresponding conical sorting groove 404 above. At the same time, the servo motor 801 receives the pulse signal and drives the moving ball screw 901 to move linearly along the outside of its threaded shaft 802 until the pneumatic gripper 902 is driven to move to the screw ejection position and starts the gripping action to grab it, completing the gripping process of sorting the screw. After gripping, the moving ball screw 901 continues to drive the pneumatic gripper 902 to move and complete the feeding process.

[0041] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0042] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application.

Claims

1. A screw feeding device comprising a feeding table (1), characterized in that: The top of the feeding platform (1) is provided with a feeding mechanism (2), the inside of the feeding platform (1) is provided with a driving device (3), one side of the driving device (3) is engaged with a sorting mechanism (4), the top of the sorting mechanism (4) extends to the top of the feeding platform (1), the top of the sorting mechanism (4) is provided with a sensor (5), the inside of the feeding platform (1) is provided with a pushing device (6), the top of the feeding platform (1) is fixedly installed with a fixed frame (7), the fixed frame (7) is provided with a second driving device (8), the output end of the second driving device (8) is threadedly connected to a moving clamping mechanism (9). The feeding mechanism (2) includes a vibrating feeding plate (201), a spiral track (202) is provided inside the vibrating feeding plate (201), a feeding guide groove (203) is provided on the outer surface of the vibrating feeding plate (201), and a positioning groove (204) is provided at the bottom of the feeding guide groove (203).

2. A screw feeding apparatus according to claim 1, wherein: The driving device (3) includes a drive motor (301), and a first gear (302) is fixedly installed at the output end of the drive motor (301). A second gear (303) meshes with one side of the first gear (302). The first gear (302) is an incomplete gear, and the second gear (303) meshes with the sorting mechanism (4).

3. A screw feeding apparatus according to claim 1, wherein: The sorting mechanism (4) includes a sorting tray (401), a main shaft (402) is fixedly installed at the bottom of the sorting tray (401), a third gear (403) is fixedly connected to one end of the main shaft (402), and a conical sorting groove (404) is opened at the top of the sorting tray (401).

4. A screw feeding apparatus according to claim 3, wherein: The number of the conical sorting grooves (404) is set to a certain extent, and the conical sorting grooves (404) are evenly distributed on the top of the sorting tray (401). One of the conical sorting grooves (404) is coaxially arranged with the feeding guide groove (203).

5. A screw feeding apparatus according to claim 1, wherein: The pushing device (6) includes an electromagnet block (601), and an electromagnetic pushing rod (602) is provided at the output end of the electromagnet block (601). The top end of the electromagnetic pushing rod (602) extends to the bottom of the conical sorting groove (404).

6. A screw feeding apparatus according to claim 1, wherein: The second drive device (8) includes a servo motor (801), the output end of which is fixedly mounted with a threaded shaft (802), the movable clamping mechanism (9) includes a movable ball screw (901), the bottom of which is provided with a pneumatic gripper (902), and the threaded shaft (802) is located on the inner wall of the fixed frame (7).

7. A screw feeding apparatus according to claim 6, wherein: A sliding block (903) is fixedly installed on the top of the movable ball screw (901), and a limit rod (10) is fixedly installed on the inner wall of the fixed frame (7). The sliding block (903) is slidably connected to the outside of the limit rod (10).

8. A screw feeding apparatus according to claim 1, wherein: The outer surface of the feeding guide groove (203) is provided with an inclined guide groove (205), and the output end of the inclined guide groove (205) extends to the inner wall of the positioning groove (204).

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