Automatic screw driving device

Abstract

The utility model belongs to the field of automatic control, particularly relates to an automatic screw driving device, and aims to solve the problem of how to judge whether a screw driving position is accurate or not in advance. The device comprises a fixed frame, a telescopic device, a sliding frame, a screw driving device, a guide rod, a mounting block, an elastic sheet, a contact part, a proximity switch, a guide groove and a guide rod, and the screw driving position is judged through contact and separation of the elastic sheet and the proximity switch. According to the punching device, the punching position can be accurately judged, and damage to parts can be avoided.

Description

Technical Field

[0001] This utility model belongs to the field of automatic control, and in particular relates to an automatic screw-driving device. Background Technology

[0002] With the development of technology and processes, factories now commonly use machines for automatic screw fastening, thereby improving production efficiency and reducing production costs.

[0003] The process of using automated equipment to drive screws is as follows: first, input the position information, that is, control the movement position of the mechanical transmission module, then obtain the screw according to the preset position information and lock the screw into the preset hole.

[0004] Currently, the materials used in automated screw-driving production mainly include plastics (such as circuit boards), templates, and sheet metal. During production, if the input position information is accurate, the screw-driving system will automatically drive the screw into the preset hole. However, if the input position information is inaccurate, or if the product to be screwed is misplaced, the drilling will deviate, and the screw will be driven into the wrong position as the electric screwdriver moves down the machine, resulting in a defective product. When the product is a sheet metal, it may also damage important production equipment such as the electric screwdriver.

[0005] Patent document CN211162790U discloses an automatic screw-driving system, including a mechanical body, a mechanical transmission device, an electrical device, and a clamping device. The clamping device includes an electric screwdriver, a feed tube, screw jaws, and a sensor device. The mechanical body is connected to the mechanical transmission device, the electrical device, the electric screwdriver, and the sensor device. The electrical device feeds screws to the screw jaws via the feed tube using air blowing. By installing the sensor device on the clamping device to collect the working parameters of the electric screwdriver in real time, the mechanical body controls the working state of the electric screwdriver based on the collected parameters. This prevents the electric screwdriver from forcibly operating when the drilling position is incorrect, thus avoiding damage to the product and equipment. This system improves the quality of automatic screw-driving and can be widely applied in the field of automatic control.

[0006] However, the above technical solution determines whether the hole is aligned by judging the pressure value or parameter change of the electric screwdriver. When this technical solution detects a change in parameter or pressure value, the screw-driving mechanism has already started to tighten the screw, causing damage to the parts. Utility Model Content

[0007] To address the aforementioned problems in the prior art, namely, how to determine in advance whether the screw position is accurate, this utility model provides an automatic screw-driving device.

[0008] The technical solution of this utility model includes:

[0009] An automatic screw-driving device includes a fixed frame (1) and a screw-driving device (3), characterized in that: a sliding frame (2) and a telescopic device (10) are provided on the fixed frame (1), the telescopic end of the telescopic device (10) is connected to the sliding frame (2) and drives it to move, the screw-driving device (3) is fixedly installed on the sliding frame (2), a guide rod (4) is provided at the front end of the sliding frame (2), the lower end of the guide rod (4) is connected to the mounting block (5), guide rods (9) are provided at both ends of the mounting block (5), inclined guide grooves (8) with the front higher than the back are symmetrically provided on both sides of the fixed frame (1), the guide rods (9) are inserted into the guide grooves (8), an arc-shaped elastic piece (6) is provided at the bottom of the mounting block (5), a contact part (11) is provided at the bottom of the arc-shaped elastic piece (6), and the front end of the arc-shaped elastic piece (6) is in contact with a proximity switch (7) provided at the front end of the mounting block (5) under normal conditions.

[0010] As an optional technical solution, the guide rod (4) is a polygonal rod-shaped structure.

[0011] As an optional technical solution, the telescopic device (10) is a hydraulic telescopic cylinder, the cylinder body of which is fixedly installed on the fixed frame (1), and the telescopic end and the sliding frame (2) are fixedly connected.

[0012] As an optional technical solution, the proximity switch (7) is a capacitive proximity switch.

[0013] As an optional technical solution, the front end of the arc-shaped elastic sheet (6) is provided with an upwardly extending bent portion, which is in contact with the proximity switch (7) under normal conditions.

[0014] As an optional technical solution, the contact part (11) is a cone.

[0015] As an optional technical solution, the contact part (11) is a cone.

[0016] The beneficial effects of this utility model are:

[0017] (1) This utility model first moves the fixed frame to the position where screwing is required via an external drive. Then, the telescopic device drives the sliding frame to move backward, which in turn drives the screwing mechanism and guide rod to move backward together. This causes the elastic plate and its contact part to move above the screwing position. Simultaneously, the mounting block descends under the action of the guide rod and guide groove. When the screwing position corresponds to the actual hole position, the contact part enters the hole, and the elastic plate descends and disengages from the proximity switch, indicating that the position is correct. Then, the telescopic mechanism reverses its action, and the screwing device moves to the correct position to perform the screwing operation. When the position is incorrect, the elastic plate and proximity switch remain in contact, and the screwing device does not work. In summary, this device can accurately determine the drilling position, thus avoiding damage to parts.

[0018] (2) The present invention adopts a conical contact part, which can expand the adaptability of the contact part and is applicable to different hole diameters. Attached Figure Description

[0019] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0020] Figure 1 This is a schematic diagram of the automatic screw-driving device of this utility model;

[0021] Figure 2 This is a schematic diagram of the automatic screw-driving device of this utility model from a bottom angle.

[0022] Figure label:

[0023] 1-Fixed bracket, 2-Sliding bracket, 3-Screwing device, 4-Guide rod, 5-Mounting block, 6-Elastic sheet, 7-Proximity switch, 8-Guide groove, 9-Guide rod, 10-Telescopic device, 11-Contact part. Detailed Implementation

[0024] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings.

[0025] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0026] This utility model provides an automatic screw-driving device.

[0027] like Figure 1 , Figure 2 As shown, a sliding frame 2 is provided on the fixed frame 1, a screw-driving device 3 is fixedly provided on the sliding frame 2, a guide rod 4 is provided on the sliding frame 2, the lower end of the guide rod 4 is fixedly connected to the mounting block 5, an elastic piece 6 is provided below the mounting block 5, the elastic piece 6 is an arc-shaped elastic piece, a contact part 11 is fixedly provided on the lower surface of the elastic piece 6, a proximity switch 7 is provided at the front end of the mounting block 5, the front end of the elastic piece 6 is in normal contact with the proximity switch 7, the fixed frame 1 is provided with inclined guide grooves 8 on both sides with the front higher than the back, and the mounting block 5 is inserted into the guide grooves 8 on both sides through guide rods 9.

[0028] The screw-driving device 3 is a screw-driving mechanism in the prior art, which includes an electric screwdriver for turning screws and a clamping structure for holding screws.

[0029] The guide rod 4 is a polygonal rod structure, which serves as a guide while preventing the mounting block 5 from deflecting laterally.

[0030] The telescopic device 10 is a hydraulic telescopic cylinder. The cylinder body of the hydraulic telescopic cylinder is fixedly mounted on the fixed frame 1, and the telescopic end is fixedly connected to the sliding frame 2. The hydraulic telescopic cylinder drives the sliding frame 2 and the screw-driving device 3 to move through lateral telescopic extension.

[0031] In this invention, the contact part 11 is a cone. The cone-shaped structure is easy to adapt to screw holes of different diameters and can be smoothly inserted into the screw hole.

[0032] Proximity switch 7 is a capacitive proximity switch.

[0033] In this invention, all electrical components and their compatible power supplies are connected by wires. A suitable controller is selected according to the actual situation to meet the control requirements. The specific connection and control sequence are described in the working principle below. The electrical components are connected in the order of operation. The specific connection method is a well-known technology in the field. The following mainly introduces the working principle and process, and will not describe the electrical control.

[0034] Working principle of this utility model:

[0035] During operation, the fixed bracket 1 is moved to the position where screwing is required by external drive. Then, the telescopic device 10 drives the sliding bracket 2 to move backward. The sliding bracket 2 drives the screwing device 3 and the guide rod 4 to move backward together, thereby moving the mounting block 5, the elastic plate 6, and the contact part 11 on the elastic plate 6 to above the screwing position. At the same time, under the action of the guide rod 9 and the guide groove 8, the mounting block 5, the elastic plate 6, and the contact part 11 descend. When the screwing position corresponds to the actual opening position, the contact part 11 falls into the opening, and then the elastic plate 6 disengages from the proximity switch 7. The telescopic device 10 reverses its action, and the screwing device 3 moves to above the screwing position to perform the screwing operation. When the position is incorrect, the elastic plate 6 and the proximity switch 7 remain in contact, and the screwing device 3 does not work.

[0036] In the description of this utility model, terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," which indicate direction or positional relationships, are based on the direction or positional relationships shown in the accompanying drawings. These are used merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0037] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0038] The term "comprising" or any other similar term is intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus / device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent in such process, method, article, or apparatus / device.

[0039] The technical solution of this utility model has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the protection scope of this utility model is obviously not limited to these specific embodiments. Without departing from the principle of this utility model, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of this utility model.

Claims

1. An automatic screwing device comprising a fixed frame (1) and a screwing device (3), characterized in that: The fixed frame (1) is provided with a sliding frame (2) and a telescopic device (10), the telescopic end of the telescopic device (10) is connected with the sliding frame (2) and drives the movement of the sliding frame (2), the screwing device (3) is fixedly arranged on the sliding frame (2), the sliding frame (2) is provided with a guide rod (4) at the front end, the lower end of the guide rod (4) is connected with a mounting block (5), the mounting block (5) is provided with guide rods (9) at both ends, the fixed frame (1) is symmetrically provided with inclined guide grooves (8) with high front and low back at both sides, the guide rods (9) are inserted into the guide grooves (8), the mounting block (5) is provided with an arc-shaped elastic sheet (6) at the bottom, the arc-shaped elastic sheet (6) is provided with a contact part (11) at the bottom, and the front end of the arc-shaped elastic sheet (6) is in contact with a proximity switch (7) arranged at the front end of the mounting block (5) in a normal state.

2. The automatic screw driver device according to claim 1, wherein The guide rod (4) is a polygonal rod structure.

3. The automatic screw driver device according to claim 1, wherein The telescopic device (10) is a hydraulic telescopic cylinder, the cylinder body of the hydraulic telescopic cylinder is fixedly installed on the fixed frame (1), and the telescopic end is fixedly connected with the sliding frame (2).

4. The automatic screw driver device according to claim 1, wherein The proximity switch (7) is a capacitive proximity switch.

5. The automatic screw driver device according to claim 1, wherein The front end of the arc-shaped elastic sheet (6) is provided with an upwardly extending bending part, and the bending part is in contact with the proximity switch (7) in a normal state.

6. The automatic screw driver device according to claim 1, wherein The contact part (11) is a cone.

7. The automatic screw driver device according to claim 6, wherein The contact part (11) is a cone.

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