Automatic screw locking device
By using a vacuum suction mechanism and a piezoelectric sensor in the automatic locking screw device, the problem of photoelectric sensors being susceptible to external light has been solved, and a higher detection accuracy and reliability are achieved.
Patent Information
- Application Number
- CN202420677064.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-02
- Publication Date
- 2025-02-25
- Estimated Expiration
- 2034-04-02
AI Technical Summary
The existing automatic screw lock device detects whether the screw passes through the suction pipe through the photoelectric sensor and is susceptible to external light, resulting in low detection accuracy.
A vacuum suction mechanism is adopted, including a vacuum pump, an elastic suction tube, a piezoelectric sensor and a signal monitoring circuit. The screw is absorbed by vacuum and the pressure signal of the suction tube is monitored by using a piezoelectric sensor to achieve accurate detection of the screw.
Improve detection accuracy, reduce errors due to external light, and ensure the reliability of screw detection.
Smart Images
Figure CN222520504U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of screw locking, in particular to an automatic screw locking device. Background Art
[0002] Automatic screw locking devices are also called automatic screw feeding machines, automatic screw tightening machines, automatic screw machines, automatic screw driving machines, automatic screw fastening systems, etc. Although traditional handheld automatic screw feeding machines can free up one hand, one still needs to lift the screwdriver with one hand to align it with the screw hole to lock the screw. Manually aligning the hole requires a lot of experience and will also produce certain errors. The fully automatic screw locking device, although it adds functions such as a robotic arm or assembly line, a workbench, and automatic control positioning on the basis of the automatic feeding of the handheld automatic screw feeding machine, is a better product for automatic screw locking devices. However, in the existing automatic screw locking devices, a photoelectric sensor is used to detect whether the screw passes through the suction pipe for counting. Because it is easily affected by external light, the detection accuracy is low. Utility Model Content
[0003] The technical problem solved by the utility model is to provide an automatic screw locking device which can improve the detection accuracy.
[0004] The utility model provides an automatic screw locking device, comprising a vacuum suction mechanism, a material conveying mechanism, a screw locking mechanism, a controller, a switch and a router, wherein the vacuum suction mechanism is electrically connected to the controller and is used to absorb screws; the material conveying mechanism is connected to the vacuum suction mechanism and is used to convey the screws to a target position; the screw locking mechanism is electrically connected to the controller and is used to lock the screws at the target position; the switch is electrically connected to the controller and the router and is used to send information obtained by the controller through the router;
[0005] Among them, the vacuum suction mechanism includes a vacuum pump, an elastic suction pipe, a piezoelectric sensor and a signal monitoring circuit. The vacuum pump is electrically connected to the controller for vacuuming the suction pipe; the elastic suction pipe is connected to the vacuum pump for adsorbing screws; the piezoelectric sensor is placed under the elastic suction pipe and in contact with the elastic suction pipe; the signal monitoring circuit is electrically connected to the piezoelectric sensor and the controller for monitoring the pressure received by the piezoelectric sensor and sending the pressure signal to the controller.
[0006] Preferably, the signal monitoring circuit includes a comparator, a first resistor, a second resistor and a third resistor, the positive input terminal of the comparator is electrically connected to the first end of the first resistor, the reverse input terminal of the comparator is electrically connected to the first end of the second resistor, and the output terminal of the comparator is electrically connected to the controller; the first end of the first resistor is electrically connected to the first end of the third resistor, and the second end of the first resistor is grounded; the second end of the second resistor is electrically connected to the signal output terminal of the piezoelectric sensor, and the second end of the third resistor is used to be electrically connected to the power supply.
[0007] Preferably, the signal monitoring circuit further includes a first capacitor, a first end of the first capacitor is electrically connected to a second end of the second resistor, and a second end of the first capacitor is grounded.
[0008] Preferably, the signal monitoring circuit further includes a second capacitor, a first end of the second capacitor is electrically connected to the first end of the first resistor, and a second end of the second capacitor is grounded.
[0009] Preferably, the signal monitoring circuit also includes a photocoupler, a transistor and a fourth resistor, the first end of the photocoupler is electrically connected to the first end of the fourth resistor, the second end of the photocoupler is electrically connected to the emitter of the transistor, the third end of the photocoupler is electrically connected to the controller, and the fourth end of the photocoupler is grounded; the base of the transistor is electrically connected to the output end of the comparator, and the collector of the transistor is grounded; the second end of the fourth resistor is used to be electrically connected to a power supply.
[0010] Preferably, the signal monitoring circuit also includes a fifth resistor and a sixth resistor, the first end of the fifth resistor is electrically connected to the third end of the photoelectric coupler, and the second end of the fifth resistor is electrically connected to the controller; the first end of the sixth resistor is used to be electrically connected to the power supply, and the second end of the sixth resistor is electrically connected to the third end of the photoelectric coupler.
[0011] Preferably, the signal monitoring circuit further includes a third capacitor, a first end of the third capacitor is electrically connected to the output end of the comparator, and a second end of the third capacitor is grounded.
[0012] Preferably, the signal monitoring circuit further includes a seventh resistor, a first end of the seventh resistor is electrically connected to the output end of the comparator, and a second end of the seventh resistor is electrically connected to the collector of the transistor.
[0013] Preferably, the signal monitoring circuit further includes an eighth resistor, a first end of the eighth resistor is electrically connected to the output end of the comparator, and a second end of the eighth resistor is electrically connected to the power supply.
[0014] Preferably, the signal monitoring circuit further includes a fourth capacitor, a first end of the fourth capacitor is used to be electrically connected to the power supply, and a second end of the fourth capacitor is grounded.
[0015] The utility model has the following beneficial effects: the utility model cooperates with the vacuum suction mechanism, material conveying mechanism, screw locking mechanism, controller, switch and router, the vacuum suction mechanism includes a vacuum pump, an elastic suction pipe, a piezoelectric sensor and a signal monitoring circuit, the vacuum pump is electrically connected to the controller for vacuuming the suction pipe, the elastic suction pipe is connected to the vacuum pump for adsorbing screws, the piezoelectric sensor is placed under the elastic suction pipe and in contact with the elastic suction pipe, the signal monitoring circuit is electrically connected to the piezoelectric sensor and the controller for monitoring the pressure received by the piezoelectric sensor and sending the pressure signal to the controller. Therefore, during detection, it is possible to accurately detect whether there is a screw passing through the elastic suction pipe, thereby improving the detection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 The utility model is a functional block diagram of the automatic screw locking device.
[0017] Figure 2 The utility model is a circuit diagram of a signal acquisition module of an automatic screw locking device.
[0018] Figure 3 It is a circuit diagram of the first filter module of the automatic screw locking device of the utility model. DETAILED DESCRIPTION
[0019] The present invention is described in detail below in conjunction with the accompanying drawings and embodiments. It should be noted that, if there is no conflict, the embodiments of the present invention and the various features in the embodiments can be combined with each other, all within the protection scope of the present invention.
[0020] See also Figures 1 to 3 The utility model provides an automatic screw locking device, including a vacuum suction mechanism 1, a material conveying mechanism 2, a screw locking mechanism 3, a controller 4, a switch 5 and a router 6. The vacuum suction mechanism 1 is electrically connected to the controller 4 for sucking screws. The material conveying mechanism 2 is connected to the vacuum suction mechanism for conveying the screws to a target position. The screw locking mechanism 3 is electrically connected to the controller 4 for locking the screws at a target position, and the target position can be any mechanism that needs to be locked. The switch 5 is electrically connected to the controller 4 and the router 6 for sending the information obtained by the controller 4 to the control center through the router 6, and the control center can monitor the status of each screw locking device in real time.
[0021] The vacuum suction mechanism 1 includes a vacuum pump 11, an elastic suction pipe 12, a piezoelectric sensor 13 and a signal monitoring circuit 14. The vacuum pump 11 is electrically connected to the controller 4 and is used to evacuate the suction pipe to drive the screw to move toward the elastic suction pipe 12. The elastic suction pipe 12 is connected to the vacuum pump 11 and is used to absorb the screw. The elastic suction pipe 12 can be a silicone tube. The piezoelectric sensor 13 is placed below the elastic suction pipe 12 and contacts the elastic suction pipe 12.
[0022] Preferably, the piezoelectric sensor 13 and the elastic suction tube 12 are both fixed on a support such as a table. When the screw passes through the area where the piezoelectric sensor 13 is located in the elastic suction tube, the piezoelectric sensor 13 is squeezed. The signal monitoring circuit 14 is electrically connected to the piezoelectric sensor 13 and the controller 4 to monitor the pressure received by the piezoelectric sensor 13 and send a pressure signal to the controller 4.
[0023] The signal monitoring circuit 14 includes a comparator U, a first resistor R1, a second resistor R2 and a third resistor R3. The positive input terminal of the comparator U is electrically connected to the first end of the first resistor R1, the reverse input terminal of the comparator U is electrically connected to the first end of the second resistor R2, and the output terminal of the comparator U is electrically connected to the controller 4. The first end of the first resistor R1 is electrically connected to the first end of the third resistor R3, and the second end of the first resistor R1 is grounded. The second end of the second resistor R2 is electrically connected to the signal output terminal of the piezoelectric sensor 13, and the second end of the third resistor R3 is used to be electrically connected to the power supply.
[0024] The signal monitoring circuit 14 further includes a first capacitor C1 and a second capacitor C2, wherein a first end of the first capacitor C1 is electrically connected to a second end of the second resistor R2, and a second end of the first capacitor C1 is grounded. The signal monitoring circuit 14 further includes a second capacitor C2, wherein a first end of the second capacitor C2 is electrically connected to a first end of the first resistor R1, and a second end of the second capacitor C2 is grounded. Filtering is performed by the first capacitor C1 and the second capacitor C2, thereby better avoiding false triggering.
[0025] The signal monitoring circuit 14 also includes a photoelectric coupler T, a transistor Q and a fourth resistor R4, wherein the first end of the photoelectric coupler T is electrically connected to the first end of the fourth resistor R4, the second end of the photoelectric coupler T is electrically connected to the emitter of the transistor Q, the third end of the photoelectric coupler T is electrically connected to the controller 4, and the fourth end of the photoelectric coupler T is grounded. The base of the transistor Q is electrically connected to the output end of the comparator U, and the collector of the transistor Q is grounded. The second end of the fourth resistor R4 is used to be electrically connected to a power supply. Through the cooperation between the photoelectric coupler T and the transistor Q, a variety of controllers 4 and a variety of application scenarios can be adapted.
[0026] The signal monitoring circuit 14 further includes a fifth resistor R5 and a sixth resistor R6, wherein a first end of the fifth resistor R5 is electrically connected to a third end of the photocoupler T, and a second end of the fifth resistor R5 is electrically connected to the controller 4. A first end of the sixth resistor R6 is electrically connected to a power source, and a second end of the sixth resistor R6 is electrically connected to a third end of the photocoupler T.
[0027] The signal monitoring circuit 14 further includes a third capacitor C3 and a seventh resistor R7, wherein a first end of the third capacitor C3 is electrically connected to the output end of the comparator U, and a second end of the third capacitor C3 is grounded. A first end of the seventh resistor R7 is electrically connected to the output end of the comparator U, and a second end of the seventh resistor R7 is electrically connected to the collector of the transistor Q. Through the cooperation of the third capacitor C3 and the seventh resistor R7, the transistor Q can be protected and its service life can be extended.
[0028] The signal monitoring circuit 14 further includes an eighth resistor R8 and a fourth capacitor C4, wherein a first end of the eighth resistor R8 is electrically connected to the output end of the comparator U, and a second end of the eighth resistor R8 is electrically connected to a power supply. A first end of the fourth capacitor C4 is electrically connected to a power supply, and a second end of the fourth capacitor C4 is grounded. The power supply is filtered by the fourth capacitor C4, thereby providing a stable and reliable power supply signal.
[0029] In summary, the utility model cooperates with the vacuum suction mechanism 1, the material conveying mechanism 2, the screw locking mechanism 3, the controller 4, the switch 5 and the router 6. The vacuum suction mechanism 1 includes a vacuum pump 11, an elastic suction pipe 12, a piezoelectric sensor 13 and a signal monitoring circuit 14. The vacuum pump 11 is electrically connected to the controller 4 for evacuating the suction pipe. The elastic suction pipe 12 is connected to the vacuum pump 11 for adsorbing screws. The piezoelectric sensor 13 is placed under the elastic suction pipe 12 and in contact with the elastic suction pipe 12. The signal monitoring circuit 14 is electrically connected to the piezoelectric sensor 13 and the controller 4 for monitoring the pressure received by the piezoelectric sensor 13 and sending the pressure signal to the controller 4. Therefore, during detection, it is possible to accurately detect whether there is a screw passing through the elastic suction pipe 12, thereby improving the detection accuracy.
[0030] The automatic screw locking device provided by the utility model is introduced in detail above. Specific examples are used in this article to illustrate the principle and implementation mode of the utility model. The description of the above embodiments is only used to help understand the method and core idea of the utility model. At the same time, for those of ordinary skill in the art, according to the idea of the utility model, there will be changes in the specific implementation mode and application scope. In summary, the content of this specification is only an implementation mode of the utility model, and it does not limit the patent scope of the utility model. All equivalent structures or equivalent process changes made by using the contents of the specification and drawings of the utility model, or directly or indirectly used in other related technical fields, are similarly included in the patent protection scope of the utility model and should not be understood as limitations on the utility model.
Claims
1. An automatic screw locking device, characterized in that: It includes a vacuum suction mechanism, a material conveying mechanism, a screw locking mechanism, a controller, a switch and a router. The vacuum suction mechanism is electrically connected to the controller and is used to absorb screws; the material conveying mechanism is connected to the vacuum suction mechanism and is used to convey the screws to the target position; the screw locking mechanism is electrically connected to the controller and is used to lock the screws at the target position; the switch is electrically connected to the controller and the router and is used to send the information obtained by the controller through the router; Among them, the vacuum suction mechanism includes a vacuum pump, an elastic suction pipe, a piezoelectric sensor and a signal monitoring circuit. The vacuum pump is electrically connected to the controller for vacuuming the suction pipe; the elastic suction pipe is connected to the vacuum pump for adsorbing screws; the piezoelectric sensor is placed under the elastic suction pipe and in contact with the elastic suction pipe; the signal monitoring circuit is electrically connected to the piezoelectric sensor and the controller for monitoring the pressure received by the piezoelectric sensor and sending the pressure signal to the controller.
2. The automatic screw locking device according to claim 1, characterized in that: The automatic screw locking device also includes a power supply; the signal monitoring circuit includes a comparator, a first resistor, a second resistor and a third resistor, the positive input end of the comparator is electrically connected to the first end of the first resistor, the reverse input end of the comparator is electrically connected to the first end of the second resistor, and the output end of the comparator is electrically connected to the controller; the first end of the first resistor is electrically connected to the first end of the third resistor, and the second end of the first resistor is grounded; the second end of the second resistor is electrically connected to the signal output end of the piezoelectric sensor, and the second end of the third resistor is used to be electrically connected to the power supply.
3. The automatic screw locking device according to claim 2, characterized in that: The signal monitoring circuit further includes a first capacitor, a first end of the first capacitor is electrically connected to a second end of the second resistor, and a second end of the first capacitor is grounded.
4. The automatic screw locking device according to claim 2 or 3, characterized in that: The signal monitoring circuit further includes a second capacitor, a first end of the second capacitor is electrically connected to the first end of the first resistor, and a second end of the second capacitor is grounded.
5. The automatic screw locking device according to claim 2 or 3, characterized in that: The signal monitoring circuit also includes a photoelectric coupler, a transistor and a fourth resistor, wherein the first end of the photoelectric coupler is electrically connected to the first end of the fourth resistor, the second end of the photoelectric coupler is electrically connected to the emitter of the transistor, the third end of the photoelectric coupler is electrically connected to the controller, and the fourth end of the photoelectric coupler is grounded; the base of the transistor is electrically connected to the output end of the comparator, and the collector of the transistor is grounded; the second end of the fourth resistor is used to be electrically connected to a power supply.
6. The automatic screw locking device according to claim 5, characterized in that: The signal monitoring circuit also includes a fifth resistor and a sixth resistor, the first end of the fifth resistor is electrically connected to the third end of the photoelectric coupler, and the second end of the fifth resistor is electrically connected to the controller; the first end of the sixth resistor is used to be electrically connected to the power supply, and the second end of the sixth resistor is electrically connected to the third end of the photoelectric coupler.
7. The automatic screw locking device according to claim 5, characterized in that: The signal monitoring circuit further includes a third capacitor, a first end of the third capacitor is electrically connected to the output end of the comparator, and a second end of the third capacitor is grounded.
8. The automatic screw locking device according to claim 5, characterized in that: The signal monitoring circuit further includes a seventh resistor, a first end of the seventh resistor is electrically connected to the output end of the comparator, and a second end of the seventh resistor is electrically connected to the collector of the transistor.
9. The automatic screw locking device according to claim 5, characterized in that: The signal monitoring circuit further includes an eighth resistor, a first end of the eighth resistor is electrically connected to the output end of the comparator, and a second end of the eighth resistor is electrically connected to the power supply.
10. The automatic screw locking device according to claim 5, characterized in that: The signal monitoring circuit further includes a fourth capacitor, a first end of the fourth capacitor is used to be electrically connected to the power supply, and a second end of the fourth capacitor is grounded.