Anti-locking screw machine

Abstract

The invention relates to the field of mechanical assembly equipment, and particularly discloses an anti-locking screw machine which comprises a screw machine body and a screwdriver mechanism, and the screwdriver mechanism comprises a protection box, a guide pipe, an anti-locking assembly and a screwdriver. The anti-locking assembly is composed of an arc guide rail, an electromagnet, a magnetic sliding block and a spring, the magnetic sliding block is controlled by the electromagnet to move along the arc guide rail, and the anti-locking function of the screwdriver is achieved. In addition, the device is further provided with a pressure sensor which is used for monitoring and feeding back screw fastening force, and operation safety and reliability are guaranteed. The effect of effectively preventing the screw from being stuck in the screwing process is achieved, and the production efficiency and the product quality are improved.

Description

Technical Field

[0001] The present application relates to the field of mechanical assembly equipment, and in particular to an anti-stuck screw machine. Background Art

[0002] At present, screw machines play an important role in modern industrial production and are widely used in electronics, automobile manufacturing, home appliances and other fields. It can significantly improve assembly efficiency, reduce the time and cost of manual operation, and ensure the quality consistency of screw tightening. With the continuous development of the manufacturing industry, the demand for screw machines has increased year by year, and their performance and reliability have become the focus of enterprises. However, in the actual application process, due to the influence of various factors, such as the complexity of the working environment and the different materials of the workpiece, the screw machine often encounters jamming, which not only causes the equipment to stop for maintenance, but also causes the production line to be interrupted, seriously affecting production efficiency.

[0003] In the related art, in order to prevent the screw machine from getting stuck during use, a common solution is to introduce a sensor monitoring system to monitor the working status of the screwdriver of the screw machine in real time, and to promptly issue an alarm or stop the operation under abnormal circumstances.

[0004] The above-mentioned related technologies have the following defects: when it is detected that the screwdriver is stuck, it means that the screwdriver has been stuck. At this time, stopping the equipment in time only reduces the loss, but does not prevent the screwdriver from being damaged. Summary of the invention

[0005] In order to prevent the screwdriver from being damaged to the greatest extent, the present application provides an anti-stuck screwdriver.

[0006] The present application provides an anti-stuck screw machine that adopts the following technical solution: An anti-jamming screw machine comprises a screw machine body and a screwdriver mechanism, wherein the screwdriver mechanism is mounted on an electric screwdriver of the screw machine body; The screwdriver mechanism comprises a protection box, a guide tube, an anti-jamming component and a screwdriver, and the top of the protection box is connected to the electric screwdriver; The guide tube is installed at the bottom of the protection box, and the handle of the screwdriver is coaxially and rotatably installed in the guide tube; The anti-jamming assembly is arranged in the protection box, and the anti-jamming assembly includes an arc guide rail, an electromagnet and a magnetic slider, and the arc guide rail is connected to the protection box and has the same center as the guide tube; The electromagnet and the magnetic slide block are both slidably connected to the circular arc guide rail, and the magnetic slide block is connected to the handle of the screwdriver.

[0007] By adopting the above technical solution, the setting of the protective box effectively protects the internal components and prevents external impurities from entering and affecting the operation of the equipment. The design of the guide tube ensures the precise installation of the screwdriver and improves the operating accuracy. In order to ensure the normal operation of the screwdriver, the material strength of the screwdriver is usually greater than the strength of the screw, and the torque required to tighten the screw is less than the torque required to break the screw. The minimum torque required to tighten the screw is set to N1, and the torque required to break the screw is set to N2. After the electromagnet and the screwdriver are both started, the adsorption force between the electromagnet and the magnetic slider is set to N3, and the torque applied by the screwdriver on the screw is set to N4. When the electromagnet is running, the magnetic force of the electromagnet is adjusted by adjusting the intensity of the current, and then the adsorption force between the electromagnet and the magnetic slider is adjusted, so that N1<N3<N2, and the direction in which the electric screwdriver drives the screwdriver to rotate is the direction in which the magnetic slider is pulled away from the electromagnet. Fix the workpiece with the clamp on the screw machine body, and after the screw is placed in place, the screw machine body drives the screwdriver to tighten the screw, and make N1<N3<N4<N2. At this time, after the screwdriver tightens the screw into place, the screwdriver stops rotating. If the screwdriver does not stop in time at this time, and continues to be forced to rotate, the magnetic slider will be directly separated from the electromagnet and will slide along the arc guide for a distance. At this time, the screwdriver is in an unfixed state, and the screwdriver cannot apply torque to the screw, so that the screwdriver is not easy to get stuck, and the screwdriver and the screw are not easy to be damaged. When the next screw is rotated, the electromagnet re-attracts the magnetic slider and re-fixes the screwdriver.

[0008] Preferably, the magnetic slider is detachably connected to the screwdriver.

[0009] By adopting the above technical solution, the detachable connection between the magnetic slider and the screwdriver makes it more convenient and quick to replace screwdrivers of different specifications or types, thereby improving the flexibility and application scope of the equipment. At the same time, this design is also convenient for maintenance and overhaul, thus reducing maintenance costs.

[0010] Preferably, the electromagnet and the magnetic slider are both located at the first end of the circular arc guide rail; the anti-jamming component also includes a spring, one end of which is connected to the magnetic slider, and the other end of which is connected to the second end of the circular arc guide rail.

[0011] By adopting the above technical solution, after the magnetic slider slides along the arc guide rail and is directly separated from the electromagnet, before the screwdriver tightens the next screw, the magnetic slider needs to be re-adsorbed with the electromagnet to ensure that the screwdriver is re-fixed. At this time, the spring plays an auxiliary resetting role, and the resetting elastic force of the spring cooperates with the adsorption force of the electromagnet to drive the magnetic slider to move toward the electromagnet until it is re-adsorbed with the electromagnet.

[0012] Preferably, the anti-stuck assembly further comprises a guide rod arranged along the length direction of the circular arc guide rail, and two ends of the guide rod are respectively connected to two ends of the circular arc guide rail; The spring is sleeved on the guide rod.

[0013] By adopting the above technical solution, the design of the guide rod is added, so that the spring can move stably along the circular arc guide rail, avoiding the spring from deflecting or twisting during the expansion and contraction process.

[0014] Preferably, a pressure sensor is connected to the second end of the spring and the arc guide rail.

[0015] By adopting the above technical solution, the pressure sensor enables the screw machine body to monitor the pressure changes of the spring in real time. When the screwdriver screws the screw into place, if it is not stopped in time and continues to rotate forcibly, the magnetic slider will be directly separated from the electromagnet and will slide along the arc guide for a distance. At this time, the magnetic slider will squeeze the spring, thereby triggering the pressure sensor to generate a signal. Then, during the resetting process of the magnetic slider, the pressure data of the pressure sensor will gradually decrease until it stabilizes, so as to determine whether the magnetic slider is accurately reset and ensure that the screwdriver can be effectively fixed again.

[0016] Preferably, the pressure sensor is slidably connected to the circular arc guide rail, and is also detachably connected to the circular arc guide rail.

[0017] By adopting the above technical solution, the design improves the flexibility and maintenance convenience of the system and facilitates the replacement or adjustment of the position of the pressure sensor.

[0018] Preferably, the electromagnet is detachably connected to the circular arc guide rail.

[0019] By adopting the above technical solution, a detachable connection between the electromagnet and the circular arc guide rail is achieved, which makes replacement or maintenance more convenient and quick, and improves the maintainability and reliability of the equipment. At the same time, this design also facilitates the adjustment of the position of the electromagnet according to different usage requirements, and enhances the flexibility and adaptability of the equipment.

[0020] Preferably, a coaxially rotatable accommodation tube is provided on the inner side of the guide tube, and the accommodation tube is connected to the magnetic slider; The handle of the screwdriver is detachably mounted in the accommodating tube.

[0021] By adopting the above technical solution, the receiving tube is connected to the magnetic slider, which can effectively transmit the driving force generated by the electromagnet and ensure the realization of the anti-jamming function. In addition, the handle of the screwdriver can be detachably installed in the receiving tube, which is convenient for replacing screwdrivers of different specifications or damaged screwdrivers, thereby improving the flexibility and maintenance convenience of the equipment.

[0022] Preferably, the protective box is a sealed box; The receiving tube is dynamically sealedly connected to the guide tube; One end of the accommodating tube is closed, and the other end has an opening, and the closed end of the accommodating tube is located in the guide tube, and the handle of the screwdriver is located in the open end.

[0023] By adopting the above technical solution, the protective box is designed as a sealed box, which can effectively prevent dust and other impurities from entering the interior and ensure the normal operation of the anti-jamming component. A dynamic seal connection is achieved between the receiving tube and the guide tube, which not only ensures the free rotation of the screwdriver, but also avoids the invasion of external contaminants, thereby improving the reliability and service life of the equipment. The design of closing one end of the receiving tube can further enhance the stability of the structure, avoid the invasion of external contaminants, and facilitate the installation and replacement of the screwdriver, improving the convenience of operation.

[0024] In summary, the present application includes at least one of the following beneficial technical effects: 1. In the present application, by the cooperation of the electromagnet and the magnetic slider, before the screwdriver is about to get stuck, under the action of resistance, the electromagnet and the magnetic slider will be directly separated, so that the electric screwdriver cannot drive the screwdriver in a short time, and the screwdriver cannot apply torque to the screw at this time, so that it is not easy to cause damage between the screwdriver and the screw. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0026] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application; Figure 2 It is a schematic diagram of the overall structure of the screwdriver mechanism; Figure 3 It is a schematic diagram of the internal structure of the protective box.

[0027] Reference numerals: 1. Screw machine body; 11. Electric screwdriver; 12. Clamp; 2. Screwdriver mechanism; 21. Protection box; 22. Guide tube; 230. Positioning ring; 23. Anti-jamming assembly; 231. Arc guide rail; 232. Electromagnet; 233. Magnetic slider; 234. Spring; 235. First pressure sensor; 236. Guide rod; 237. Side connecting rod; 24. Accommodating tube; 25. Screwdriver. DETAILED DESCRIPTION

[0028] The following is combined with Figure 1-3 This application is described in further detail.

[0029] The embodiment of the present application discloses an anti-jamming screw machine.

[0030] Reference Figure 1 , Figure 2 and Figure 3 A screw machine that prevents jamming comprises a screw machine body 1 and a screwdriver mechanism 2, wherein the screwdriver mechanism 2 is mounted on an electric screwdriver 11 of the screw machine body 1.

[0031] Reference Figure 1 , Figure 2 and Figure 3 The screwdriver mechanism 2 includes a protective box 21, a guide tube 22, a screwdriver 25, a positioning ring 230 and a plurality of anti-stuck components 23. The top of the protective box 21 is connected to the electric screwdriver 11. The guide tube 22 is installed at the bottom of the protective box 21, and the handle of the screwdriver 25 is coaxially and rotatably installed in the guide tube 22. The positioning ring 230 and the plurality of anti-stuck components 23 are all arranged in the protective box 21. The positioning ring 230 is coaxially sleeved on the guide tube 22 and is detachably connected to the guide tube 22 or the protective box 21. The plurality of anti-stuck components 23 are evenly spaced along the circumference of the positioning ring 230 and are all connected to the positioning ring 230. The anti-stuck component 23 includes an arc guide rail 231, an electromagnet 232 and a magnetic slider 233. The arc guide rail 231 is connected to the protective box 21 and the positioning ring 230, and is coaxial with the guide tube 22. The electromagnet 232 and the magnetic slider 233 are both slidably connected to the arc guide rail 231 , and the magnetic slider 233 is connected to the handle of the screwdriver 25 .

[0032] Reference Figure 1 , Figure 2 and Figure 3In the embodiment of the present application, the setting of the protective box 21 effectively protects the internal components and prevents external impurities from entering and affecting the operation of the equipment. The design of the guide tube 22 ensures the accurate installation of the screwdriver 25 and improves the operation accuracy. In order to ensure the normal operation of the screwdriver 25, the material strength of the screwdriver 25 is usually greater than the strength of the screw, and the torque required to tighten the screw is less than the torque required to break the screw. The minimum torque required to tighten the screw is set to N1, and the torque required to break the screw is set to N2. After the electromagnet 232 and the screwdriver 25 are both started, the adsorption force between the electromagnet 232 and the magnetic slider 233 is set to N3, and the torque of the screwdriver 25 on the screw is set to N4. When the electromagnet 232 is running, the magnetic force of the electromagnet 232 is adjusted by adjusting the intensity of the current, and then the adsorption force between the electromagnet 232 and the magnetic slider 233 is adjusted, so that N1<N3<N2, and the direction in which the electric screwdriver 11 drives the screwdriver 25 to rotate is the direction in which the magnetic slider 233 is pulled away from the electromagnet 232. After the workpiece is fixed with the clamp 12 on the screw machine body 1 and the screw is placed in place, the screw machine body 1 drives the screwdriver 25 to tighten the screw, and makes N1<N3<N4<N2. At this time, after the screwdriver 25 tightens the screw into place, the screwdriver 25 stops rotating. If the screwdriver 25 does not stop in time at this time and continues to rotate forcibly, the magnetic slider 233 will be directly separated from the electromagnet 232 and will slide a distance along the arc guide rail 231. At this time, the screwdriver 25 is in an unfixed state, and the screwdriver 25 cannot apply torque to the screw, so that the screwdriver 25 is not easy to get stuck, and the screwdriver 25 and the screw are not easy to be damaged. When the next screw is rotated, the electromagnet 232 re-attracts the magnetic slider 233 to re-fix the screwdriver 25.

[0033] Reference Figure 1 , Figure 2 and Figure 3 , the magnetic slider 233 is detachably connected to the screwdriver 25. In the embodiment of the present application, the detachable connection between the magnetic slider 233 and the screwdriver 25 makes it more convenient and quick to replace screwdrivers 25 of different specifications or types, thereby improving the flexibility and application scope of the device. At the same time, this design is also convenient for maintenance and overhaul, reducing maintenance costs.

[0034] Reference Figure 1 , Figure 2 and Figure 3, the electromagnet 232 and the magnetic slider 233 are both located at the first end of the circular arc guide 231. The anti-jamming assembly 23 also includes a spring 234, one end of which is connected to the magnetic slider 233, and the other end is connected to the second end of the circular arc guide 231. In the embodiment of the present application, after the magnetic slider 233 slides along the circular arc guide 231 and is directly separated from the electromagnet 232, before the screwdriver 25 tightens the next screw, the magnetic slider 233 needs to be re-adsorbed with the electromagnet 232 to ensure that the screwdriver 25 is re-fixed. At this time, the spring 234 plays an auxiliary resetting role, and the resetting elastic force of the spring 234 cooperates with the adsorption force of the electromagnet 232 to drive the magnetic slider 233 to move toward the electromagnet 232 until it is re-adsorbed with the electromagnet 232.

[0035] Reference Figure 1 , Figure 2 and Figure 3 The anti-stuck assembly 23 also includes a guide rod 236 arranged along the length direction of the arc guide rail 231, and the two ends of the guide rod 236 are respectively connected to the two ends of the arc guide rail 231. The spring 234 is sleeved on the guide rod 236. In the embodiment of the present application, the design of the guide rod 236 is added, so that the spring 234 can move stably along the arc guide rail 231, avoiding the spring 234 from being offset or twisted during the extension and retraction process.

[0036] Reference Figure 1 , Figure 2 and Figure 3 , a pressure sensor is connected to the second end of the spring 234 and the circular arc guide rail 231. In the embodiment of the present application, the pressure sensor enables the screw machine body 1 to monitor the pressure changes of the spring 234 in real time. When the screwdriver 25 screws the screw into place, if it is not stopped in time and continues to rotate forcibly, the magnetic slider 233 will be directly separated from the electromagnet 232 and will slide a distance along the circular arc guide rail 231. At this time, the magnetic slider 233 will squeeze the spring 234, thereby triggering the pressure sensor to generate a signal. Then, during the resetting process of the magnetic slider 233, the pressure data of the pressure sensor will gradually decrease until it stabilizes, so as to determine whether the magnetic slider 233 is accurately reset, ensuring that the screwdriver 25 can be effectively fixed again.

[0037] Reference Figure 1 , Figure 2 and Figure 3 The pressure sensor is slidably connected to the circular arc guide rail 231, and is also detachably connected to the circular arc guide rail 231. In the embodiment of the present application, this design improves the flexibility and maintenance convenience of the system, and is convenient for replacing or adjusting the position of the pressure sensor.

[0038] Reference Figure 1 , Figure 2 and Figure 3, the electromagnet 232 is detachably connected to the circular arc guide rail 231. In the embodiment of the present application, the detachable connection between the electromagnet 232 and the circular arc guide rail 231 is realized, which makes it more convenient and quick when replacement or maintenance is needed, and improves the maintainability and reliability of the equipment. At the same time, this design also facilitates the adjustment of the position of the electromagnet 232 according to different usage requirements, enhancing the flexibility and adaptability of the equipment.

[0039] Reference Figure 1 , Figure 2 and Figure 3 , a coaxially rotatable receiving tube 24 is provided on the inner side of the guide tube 22, and the receiving tube 24 is connected to the magnetic slider 233. The handle of the screwdriver 25 is detachably installed in the receiving tube 24. In the embodiment of the present application, the receiving tube 24 is connected to the magnetic slider 233, which can effectively transmit the driving force generated by the electromagnet 232 to ensure the realization of the anti-jamming function. In addition, the handle of the screwdriver 25 is detachably installed in the receiving tube 24, which is convenient for replacing screwdrivers 25 of different specifications or damage, thereby improving the flexibility and maintenance convenience of the equipment.

[0040] Reference Figure 1 , Figure 2 and Figure 3 , the protective box 21 is a sealed box. The containing tube 24 is dynamically sealed and connected to the guide tube 22. One end of the containing tube 24 is closed, and the other end has an opening, and the closed end of the containing tube 24 is located in the guide tube 22, and the handle of the screwdriver 25 is located in the open end. In the embodiment of the present application, the protective box 21 is designed as a sealed box, which can effectively prevent dust and other impurities from entering the interior, ensuring the normal operation of the anti-stuck component 23. A dynamic sealing connection is achieved between the containing tube 24 and the guide tube 22, which not only ensures the free rotation of the screwdriver 25, but also avoids the invasion of external contaminants, thereby improving the reliability and service life of the equipment. The design of closing one end of the containing tube 24 can further enhance the stability of the structure and avoid the invasion of external contaminants. At the same time, it is convenient for the installation and replacement of the screwdriver 25, thereby improving the convenience of operation.

[0041] The implementation principle of an anti-stuck screw machine in the embodiment of the present application is: The setting of the protection box 21 effectively protects the internal components and prevents external impurities from entering and affecting the operation of the equipment. The design of the guide tube 22 ensures the accurate installation of the screwdriver 25 and improves the operating accuracy.

[0042] In order to ensure the normal operation of the screwdriver 25, the material strength of the screwdriver 25 is usually greater than the strength of the screw, and the torque required to tighten the screw is less than the torque required to break the screw. The minimum torque required to tighten the screw is set to N1, and the torque required to break the screw is set to N2. After the electromagnet 232 and the screwdriver 25 are both started, the adsorption force between the electromagnet 232 and the magnetic slider 233 is set to N3, and the torque applied by the screwdriver 25 on the screw is set to N4.

[0043] When the electromagnet 232 is running, the intensity of the current is adjusted to adjust the magnetic force of the electromagnet 232, and then the adsorption force between the electromagnet 232 and the magnetic slider 233 is adjusted to make N1<N3<N2, and the direction in which the electric screwdriver 11 drives the screwdriver 25 to rotate is the direction to pull the magnetic slider 233 away from the electromagnet 232.

[0044] After the workpiece is fixed with the clamp 12 on the screw machine body 1 and the screw is placed in place on the workpiece, the screw machine body 1 drives the screwdriver 25 to screw the screw, and makes N1<N3<N4<N2. At this time, after the screwdriver 25 screws the screw into place, the screwdriver 25 stops rotating. If the screwdriver 25 does not stop in time at this time and continues to be forcibly rotated, the magnetic slider 233 will be directly separated from the electromagnet 232 and will slide a distance along the arc guide rail 231. At this time, the screwdriver 25 is in an unfixed state, and the screwdriver 25 cannot apply torque to the screw. At this time, the screwdriver 25 is not easy to get stuck, and thus it is not easy for the screwdriver 25 and the screw to be damaged. When the next screw is rotated, the electromagnet 232 re-attracts the magnetic slider 233 to re-fix the screwdriver 25.

[0045] Unless otherwise defined, the technical terms or scientific terms used in this application should be understood by people with ordinary skills in the field to which this application belongs. The words "first", "second", "third" and similar words used in the specification and claims of this application do not indicate any order, quantity or importance, but are only used to distinguish different components. "One" or "one" and similar words do not indicate a quantitative limit, but indicate that there is at least one. "Include" or "comprise" and similar words mean that the elements or objects appearing before "include" or "comprise" include the elements or objects listed after "include" or "comprise" and their equivalents, and do not exclude other elements or objects. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0046] The above are all optional embodiments of the present application, and are not intended to limit the protection scope of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An anti-stuck screw machine, characterized in that: It comprises a screw machine body (1) and a screwdriver mechanism (2), wherein the screwdriver mechanism (2) is mounted on an electric screwdriver (11) of the screw machine body (1); The screwdriver mechanism (2) comprises a protection box (21), a guide tube (22), an anti-jamming component (23) and a screwdriver (25); the top of the protection box (21) is connected to the electric screwdriver (11); The guide tube (22) is mounted on the bottom of the protection box (21), and the handle of the screwdriver (25) is coaxially and rotatably mounted in the guide tube (22); The anti-jamming assembly (23) is arranged in the protection box (21), and comprises an arc guide rail (231), an electromagnet (232) and a magnetic slide block (233); the arc guide rail (231) is connected to the protection box (21) and is coaxial with the guide tube (22); The electromagnet (232) and the magnetic slide block (233) are both slidably connected to the circular arc guide rail (231), and the magnetic slide block (233) is connected to the handle of the screwdriver (25).

2. The anti-seizure screw machine according to claim 1, characterized in that: The magnetic sliding block (233) is detachably connected to the screwdriver (25).

3. The anti-seizure screw machine according to claim 2, characterized in that: The electromagnet (232) and the magnetic slider (233) are both located at the first end of the circular arc guide rail (231); The anti-jamming assembly (23) further comprises a spring (234), one end of the spring (234) being connected to the magnetic slider (233), and the other end of the spring (234) being connected to the second end of the circular arc guide rail (231).

4. The anti-seizure screw machine according to claim 3, characterized in that: The anti-jamming assembly (23) further comprises a guide rod (236) arranged along the length direction of the circular arc guide rail (231), and two ends of the guide rod (236) are respectively connected to two ends of the circular arc guide rail (231); The spring (234) is sleeved on the guide rod (236).

5. The anti-seizure screw machine according to claim 4, characterized in that: The spring (234) and the second end of the circular arc guide rail (231) are connected to a pressure sensor.

6. The anti-seizure screw machine according to claim 5, characterized in that: The pressure sensor is slidably connected to the circular arc guide rail (231), and is also detachably connected to the circular arc guide rail (231).

7. The anti-seizure screw machine according to claim 6, characterized in that: The electromagnet (232) is detachably connected to the circular arc guide rail (231).

8. The anti-seizure screw machine according to claim 1, characterized in that: A coaxially rotatable accommodation tube (24) is provided on the inner side of the guide tube (22), and the accommodation tube (24) is connected to the magnetic slider (233); The handle of the screwdriver (25) is detachably mounted in the accommodation tube (24).

9. The anti-seizure screw machine according to claim 8, characterized in that: The protection box (21) is a sealed box; The receiving tube (24) is dynamically sealedly connected to the guide tube (22); One end of the accommodating tube (24) is closed, and the other end has an opening, and the closed end of the accommodating tube (24) is located in the guide tube (22), and the handle of the screwdriver (25) is located in the open end.

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