Screw locking electric screwdriver mechanism

Abstract

The invention discloses a screw locking electric screwdriver mechanism which comprises an electric screwdriver, an electric screwdriver fixing set, an electric screwdriver fixing set guide rail, a screw suction nozzle, a suction nozzle fixing set, a suction nozzle fixing set guide rail and a contact type displacement sensor. The screw suction nozzle is vertically fixed to the center of the lower end face of the suction nozzle fixing set and used for sucking screws. The suction nozzle fixing group is in sliding fit with the suction nozzle fixing group guide rail which is vertically arranged, and can move up and down through a transmission structure, so that the height between the suction nozzle fixing group and the electric screwdriver is adjusted, and the requirements of different screws and mounting surface heights are met.

Description

Technical Field

[0001] The present invention relates to a screwdriving electric batch mechanism, belonging to the field of industrial automation, and is mainly used for screwing screws with an electric batch. Background Art

[0002] In recent years, the market demand for large-size display devices such as in-vehicle screens, monitors, and TVs has been increasing year by year. Against this background, its production and assembly processes urgently need to be optimized and improved. The traditional manual screw driving method is gradually difficult to meet the production requirements, and the automatic screw locking method has emerged and gradually replaced manual operations. However, in order to ensure accurate positioning and stability during the screw locking process, and to effectively monitor each locked screw, the existing screw locking mechanisms can no longer meet the requirements, and there is an urgent need for a more advanced screwdriving electric batch mechanism. Summary of the Invention

[0003] Aiming at the deficiencies of the existing technology, the present invention provides a screwdriving electric batch mechanism, which can ensure the accuracy and stability when screwing screws, and realizes the monitoring of each locked screw.

[0004] To achieve the above object, the present invention provides the following technical solutions: A screwdriving electric batch mechanism includes an electric batch, an electric batch fixing group, an electric batch fixing group guide rail, a screw suction nozzle, a suction nozzle fixing group, a suction nozzle fixing group guide rail, and a contact displacement sensor. Among them, the screw suction nozzle is vertically fixed at the center position of the lower end face of the suction nozzle fixing group for sucking screws. The suction nozzle fixing group is slidably matched with the vertically arranged suction nozzle fixing group guide rail, and can move up and down through a transmission structure to adjust the height between the suction nozzle fixing group and the electric batch to meet the requirements of different screws and the height of the installation surface.

[0005] The electric batch is horizontally fixed at the middle position of the electric batch fixing group, and the electric batch fixing group provides stable support for the electric batch. The electric batch fixing group guide rail is vertically installed on the mechanism frame to guide the up and down movement of the electric batch fixing group to ensure smooth movement of the electric batch fixing group. The contact displacement sensor is vertically installed on one side of the electric batch fixing group, and its probe faces the rising path direction of the electric batch fixing group, and is used to obtain relevant values to judge the screw locking state when the electric batch fixing group rises and compresses the probe during the screw locking process. The suction nozzle fixing group guide rail is vertically installed on the mechanism frame, parallel to and maintaining a certain distance from the electric batch fixing group guide rail to ensure the coordination of the movement of each component.

[0006] Further preferably, the screw suction nozzle sucks screws through the principle of vacuum adsorption or magnetic adsorption. During the suction process, by using the uniformity and precise control of the adsorption force, the screw can be kept in an accurate position on the suction nozzle to achieve precise positioning.

[0007] Further preferably, a motor-driven screw nut pair or linear module is used between the nozzle fixing group and the nozzle fixing group guide rail. When the motor is running, it drives the screw nut pair or linear module to work, so that the nozzle fixing group can move up and down along the nozzle fixing group guide rail. In this way, the height between the nozzle fixing group and the electric screwdriver can be flexibly adjusted to meet the actual needs of screws of different specifications and different installation surface heights, ensuring that the screws can be accurately delivered to the locking position.

[0008] Furthermore, the electric screwdriver is firmly fixed to the electric screwdriver fixing group by a specially designed installation fixture. The installation fixture adopts a combination of high-precision positioning structure and fastening components to ensure that the electric screwdriver is accurately positioned and not easy to loosen after installation. The electric screwdriver fixing group provides stable and reliable support for the electric screwdriver with its high-strength and good rigidity structural design. During the operation of the electric screwdriver, the reasonable mechanical structure of the electric screwdriver fixing group can effectively disperse the torque and vibration generated by the operation of the electric screwdriver, ensure that the electric screwdriver is evenly stressed, reduce component wear caused by uneven force, extend the service life of the electric screwdriver, and ensure that the screw locking process is smooth and efficient.

[0009] Further preferably, during the screw locking operation, the screw locking electric screwdriver mechanism moves downward as a whole to send the screw to the position to be locked. At this time, the electric screwdriver fixing group slides upward along the vertically installed electric screwdriver fixing group guide rail, and its movement will accurately compress the probe of the contact displacement sensor. The contact displacement sensor has high sensitivity and fast response characteristics. When compressed, it can collect displacement data in real time and transmit these precise values ​​to the control system in the form of electrical signals quickly and stably. The control system analyzes and compares the received data in real time according to the preset standard value range, so as to accurately determine whether the current screw locking meets the requirements, thereby realizing dynamic and accurate monitoring of the screw locking status; It is further preferred that the contact displacement sensor closely cooperates with the electric screwdriver fixing group and the electric screwdriver fixing group guide rail and operates in coordination. During the screw locking process, the electric screwdriver fixing group rises along the electric screwdriver fixing group guide rail, driving the probe of the contact displacement sensor to produce corresponding displacement changes. The sensor feeds back the captured displacement data to the control system in real time. The control system combines the preset screw locking parameters and analyzes and processes the displacement data to accurately determine the screw locking status.

[0010] When there is a floating nail, the screw is not completely tightened, the electric screwdriver fixing group rises beyond the normal range, and the displacement data fed back by the sensor is too large; if over-tightening occurs, the screw is over-screwed, the electric screwdriver fixing group does not rise enough, and the sensor data is too small; and when it is not tightened, the displacement data will also deviate from the normal range. Through this collaborative working mechanism, various screw locking abnormalities such as floating nails, over-tightening or under-tightening can be effectively detected, and the screw locking process can be accurately monitored to ensure the quality of screw locking.

[0011] Further preferably, a high-precision linear bearing or a slide rail is used for the cooperation between the electric screwdriver fixing group and the electric screwdriver fixing group guide rail. This cooperation method has the following characteristics and advantages: Both the high-precision linear bearing and the slide rail have undergone precision machining and strict quality inspection. Their dimensional accuracy, surface roughness, geometric tolerance and other indicators are all controlled within a very small range, ensuring the accuracy of the cooperation. The linear bearing uses rolling friction instead of sliding friction, with an extremely small friction coefficient, which can significantly reduce the movement resistance and make the movement of the electric screwdriver fixing group on the electric screwdriver fixing group guide rail smoother. At the same time, the contact area between the rolling elements and the track is small, but the load-bearing capacity is strong, which can effectively disperse various forces received by the electric screwdriver fixing group during the movement process and ensure the smoothness of the movement.

[0012] When the electric screwdriver fixing group moves on the electric screwdriver fixing group guide rail, it can maintain a high degree of smoothness, effectively avoiding the generation of shaking and vibration. This not only ensures that the contact displacement sensor can accurately collect the displacement data of the electric screwdriver fixing group, providing a reliable basis for the judgment of the screw locking state, but also helps to improve the accuracy and quality of screw locking and reduce the problem of poor screw locking caused by shaking.

[0013] Further preferably, the screw locking electric screwdriver mechanism is also equipped with a driving motor, which is specifically used to drive the nozzle fixing group to move along the nozzle fixing group guide rail. The driving motor uses a high-performance servo motor or a stepping motor, which has high-precision positioning control ability and good dynamic response characteristics.

[0014] During the height adjustment process, the control system will also form a closed-loop control loop by combining the real-time position information fed back by the position sensor installed on the nozzle fixing group or the guide rail. By continuously comparing the deviation between the target position and the actual position and making dynamic adjustments, it is ensured that the nozzle fixing group can stop at the preset height position with extremely high precision, realizing the precise adjustment of the height between the nozzle fixing group and the electric screwdriver.

[0015] During the entire screw locking process, the control system realizes the closed-loop control of the screw locking quality through the real-time monitoring and analysis of the data of the contact displacement sensor, ensuring that the locking state of each screw can be accurately monitored and effectively adjusted, greatly improving the assembly quality and production efficiency of the product.

[0016] The present invention has the following beneficial effects: The invented screw locking electric screwdriver mechanism realizes the organic integration of functions such as screw suction, height adjustment, electric screwdriver fixing, and screw locking status monitoring through the coordination between various technical features. The screw suction nozzle cooperates with the nozzle fixing group and the nozzle fixing group guide rail to accurately locate the screws and adapt to different installation requirements; the electric screwdriver cooperates with the electric screwdriver fixing group and the electric screwdriver fixing group guide rail to ensure the stable operation of the electric screwdriver; the contact displacement sensor cooperates with the electric screwdriver fixing group and the electric screwdriver fixing group guide rail to realize accurate monitoring of the screw locking process. On the whole, it can accurately judge the relative height between the screw head and the screw fixing plane after each screw locking, effectively judge whether there is a floating nail, and promptly discover and deal with the problem of poor screw locking in the product production process. Compared with the existing technology, it significantly improves the accuracy, stability and product production quality of screw locking, while improving production efficiency and reducing the defective rate.

[0017] In order to more clearly illustrate the structural features and effects of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional diagram of a screw locking electric screwdriver mechanism mentioned in the present invention. DETAILED DESCRIPTION

[0019] The present invention will be further explained below in conjunction with the accompanying drawings and related knowledge, and described clearly and completely. Obviously, the described application is only a part of the embodiments of the present invention, rather than all the embodiments.

[0020] Reference Figure 1 As shown, a screw locking electric screwdriver mechanism of the present invention includes an electric screwdriver 01, an electric screwdriver fixing group 02, an electric screwdriver fixing group guide rail 03, a screw suction nozzle 04, a suction nozzle fixing group 05, a suction nozzle fixing group guide rail 06 and a contact displacement sensor 07; a specific screw suction component, the screw suction nozzle 04 is vertically fixed to the center position of the lower end surface of the suction nozzle fixing group 05, and the screw suction function is realized by vacuum adsorption or magnetic adsorption principle. The suction nozzle 04 has a built-in pressure sensor or magnetic detection unit, which can monitor the adsorption state in real time to ensure that the screw is firmly absorbed. After the screw suction nozzle 04 absorbs the screw, the screw position is secondary calibrated through the visual positioning system, and the positioning accuracy can reach ±0.05mm, providing a reliable basis for subsequent accurate locking. At the same time, the screw suction nozzle 04 adopts a quick-change structure design, which can be quickly replaced according to different screw specifications to improve the versatility of the equipment.

[0021] In the present invention, the height adjustment component, the nozzle fixing group 05 is slidably matched with the vertically arranged nozzle fixing group guide rail 06, and the servo motor drives the screw nut pair or the linear module to realize up and down movement.

[0022] In the present invention, the electric screwdriver fixing assembly 02, the electric screwdriver 01 is horizontally fixed to the middle position of the electric screwdriver fixing assembly 02 by a special installation clamp, and the clamp adopts an embracing elastic locking structure, which can effectively buffer the vibration of the electric screwdriver 01 when working.

[0023] In the present invention, the displacement sensing monitoring component, the contact displacement sensor 07 is vertically installed on one side of the electric screwdriver fixing group 02. During the screw locking process, the mechanism drops as a whole, and the electric screwdriver fixing group 02 slides upward through the electric screwdriver fixing group guide rail 03, compressing the contact displacement sensor 07 probe. The sensor has a measurement resolution of 0.1μm and a sampling frequency of ≥1kHz. It can collect displacement data in real time and transmit it to the control system. Further preferably, the control system has a built-in locking quality analysis algorithm. By comparing the displacement data with the preset standard value, the screw locking state can be accurately judged. When the numerical deviation exceeds the set threshold (such as floating nail deviation>0.2mm, over-tightening or under-tightening deviation>0.15mm), the system immediately determines that the screw is poorly locked and triggers the alarm mechanism to achieve accurate monitoring of the screw locking process.

[0024] In the present invention, the guide rail support assembly, the electric screwdriver fixed group guide rail 03 is vertically installed on the mechanism frame, and the suction nozzle fixed group guide rail 06 is also vertically installed on the mechanism frame and is parallel to the electric screwdriver fixed group guide rail 03.

[0025] In the present invention, the screw suction nozzle 04 is fixed to the suction nozzle fixing group 05, and is used to suck screws. The height between the suction nozzle fixing group 05 and the electric screwdriver 01 can be adjusted by the suction nozzle fixing group guide rail 06. The electric screwdriver 01 is fixed to the electric screwdriver fixing group 02. When the mechanism is screwing, it descends as a whole, and the electric screwdriver fixing group 02 rises through the electric screwdriver fixing group guide rail 03, and then compresses the contact displacement sensor 07 probe. The value of the contact displacement sensor 07 after compression is the standard value relative to the screw fixing plane after the screw is locked. If this value is too large or too small, it is judged that the screw is not locked properly this time. This screw locking mechanism can be used to judge the relative height between the screw head and the screw fixing plane after each screw is locked, so as to judge whether there is a floating nail situation, so that defects can be discovered and dealt with in time during the product production process.

[0026] The technical principle of the present invention is described above in combination with the specific embodiments, which are only preferred implementations of the present invention. The protection scope of the present invention is not limited to the above embodiments, and all technical solutions under the idea of ​​the present invention belong to the protection scope of the present invention. Those skilled in the art can think of other specific implementations of the present invention without creative work, and these methods will fall within the protection scope of the present invention.

Claims

1. A screwdriving electric batch mechanism, characterized in that It includes an electric screwdriver (01), an electric screwdriver fixing group (02), an electric screwdriver fixing group guide rail (03), a screw suction nozzle (04), a suction nozzle fixing group (05), a suction nozzle fixing group guide rail (06), and a contact displacement sensor (07); the screw suction nozzle (04) is vertically fixed at the center position of the lower end face of the suction nozzle fixing group (05); the suction nozzle fixing group (05) is slidably matched with the suction nozzle fixing group guide rail (06), and the suction nozzle fixing group guide rail (06) is vertically arranged; the electric screwdriver (01) is horizontally fixed at the middle position of the electric screwdriver fixing group (02); the contact displacement sensor (07) is vertically installed on one side of the electric screwdriver fixing group (02), and its probe faces the rising path direction of the electric screwdriver fixing group (02); the electric screwdriver fixing group guide rail (03) is vertically installed on the mechanism frame to guide the up and down movement of the electric screwdriver fixing group (02), and the suction nozzle fixing group guide rail (06) is vertically installed on the mechanism frame, parallel to the electric screwdriver fixing group guide rail (03) and maintaining a distance.

2. The electric screwdriver locking mechanism according to claim 1, characterized in that, The screw suction nozzle (04) sucks the screw by the principle of vacuum adsorption or magnetic adsorption and can accurately position the screw.

3. The screwdriving electric batch mechanism according to claim 1, characterized in that, The suction nozzle fixing group (05) and the suction nozzle fixing group guide rail (06) move up and down through a motor-driven screw-nut pair or a linear module to adjust the height between the suction nozzle fixing group (05) and the electric screwdriver (01) to adapt to the height requirements of different screws and installation surfaces.

4. The screwdriving electric screwdriver mechanism according to claim 1, characterized in that, The electric screwdriver (01) is fixed to the electric screwdriver fixing group (02) through a mounting fixture, and the electric screwdriver fixing group (02) provides stable support for the electric screwdriver (01) to ensure uniform force when the electric screwdriver (01) is working.

5. The screwdriving electric batch mechanism according to claim 1, characterized in that, During the screw locking process, the whole mechanism descends, the electric screwdriver fixing group (02) rises through the electric screwdriver fixing group guide rail (03) and compresses the probe of the contact displacement sensor (07), and the contact displacement sensor (07) transmits the numerical value to the control system in real time for judging the screw locking state.

6. The electric screwdriver locking mechanism according to claim 1, characterized in that The contact displacement sensor (07) works in cooperation with the electric screwdriver fixing group (02) and the electric screwdriver fixing group guide rail (03) to achieve precise monitoring of the screw locking process and detect floating nails, over-tightening or under-tightening.

7. The screwdriving electric screwdriver mechanism according to any one of claims 1-6, characterized in that, A high-precision linear bearing or a slider guide rail is used between the electric screwdriver fixing group (02) and the electric screwdriver fixing group guide rail (03) to ensure smooth movement of the electric screwdriver fixing group (02) without shaking.

8. The screwdriving electric screwdriver mechanism according to any one of claims 1-6, characterized in that, It also includes a driving motor for driving the suction nozzle fixing group (05) to move along the suction nozzle fixing group guide rail (06). The driving motor is connected to the control system and accepts the control system instructions to achieve precise height adjustment.

9. The screwdriving electric screwdriver mechanism according to any one of claims 1-6, characterized in that, The contact displacement sensor (07) is connected to the control system. The control system judges whether the screw locking is defective according to the transmitted numerical value and can control the working state of the electric screwdriver (01).

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