Safety device for screw machine

Abstract

The application relates to a screw machine safety protection device, which comprises a fixed laser group arranged on the near side of an electric wrench and fixedly installed on a base of the screw machine, the fixed laser group comprising a fixed transmitter and a fixed receiver, the fixed transmitter and the fixed receiver being respectively located on two sides of a jig, and the fixed transmitter and the fixed receiver forming a stop area; a mobile laser group comprising a mobile transmitter, a mobile receiver and an adjusting mechanism, the mobile transmitter and the mobile receiver forming a deceleration area, the adjusting mechanism being fixedly installed on the two sides of the jig, the mobile transmitter and the mobile receiver being installed on the adjusting mechanism, and the adjusting mechanism being used to adjust the relative positions between the fixed laser group and the mobile laser group. The application has the advantages that the screw machine is provided with hierarchical safety protection, and the position of the mobile laser group can be flexibly adjusted to adapt to different required effects.

Description

Technical Field

[0001] This application relates to the technical field of mechanical equipment, and in particular to a safety protection device for a screw machine. Background Technology

[0002] In the field of industrial production and manufacturing, the application of automated equipment is becoming more and more widespread. As a commonly used automated assembly equipment, screw machines play an important role in the production lines of various electronic products and mechanical equipment. With the continuous improvement of the manufacturing industry's requirements for production precision and efficiency, the performance and functions of screw machines are also being continuously improved and optimized.

[0003] In related technologies, when human intervention occurs in the fixture, in order to ensure the safety of personnel during the operation of the screw machine, a light curtain sensor is used. This sensor emits and receives light in a specific area of ​​the screw machine. When the light is blocked, a corresponding safety mechanism is triggered to determine whether personnel or objects have entered the danger zone. When an object is detected approaching, the electric screwdriver of the screw machine is controlled to pause or stop operation to avoid safety accidents. To a certain extent, this can play a role in protecting personnel safety.

[0004] However, while the above technologies can prevent personnel from directly contacting the screw machine, they cannot flexibly adapt to different working scenarios, which will affect the operator's ease of operation of the screw machine. Moreover, frequent sudden stops of the screw machine will cause significant damage to the screw machine. Utility Model Content

[0005] To address the aforementioned technical problems, this application provides a safety protection device for screw-making machines.

[0006] The screw-making machine safety protection device provided in this application adopts the following technical solution: A screw-making machine safety protection device, comprising: A fixed laser assembly is provided and fixedly mounted on the base of the screwdriver near the electric screwdriver side. The fixed laser assembly includes a fixed transmitter and a fixed receiver. The fixed transmitter and the fixed receiver are located on both sides of the fixture, forming a stop zone, and the moving transmitter and the moving receiver forming a deceleration zone. A mobile laser group includes a mobile transmitter, a mobile receiver, and an adjustment mechanism. The mobile transmitter and the mobile receiver form a deceleration zone. The adjustment mechanism is fixedly installed on both sides of a fixture. The mobile transmitter and the mobile receiver are mounted on the adjustment mechanism. The adjustment mechanism is used to adjust the relative position between the fixed laser group and the mobile laser group.

[0007] By adopting the above technical solution, a fixed laser group is set on the screw machine base near the electric screwdriver side, and a movable laser group with adjustable relative positions is set on both sides of the fixture. This allows for tiered protection based on the distance of personnel or objects approaching, better adapting to complex production environments and ensuring personnel safety compared to existing protective measures. The adjustment mechanism can adjust the relative positions between the fixed and movable laser groups, flexibly adapting to different working scenarios and workpiece sizes, improving the operational safety of the screw machine. Furthermore, the relative positions of the two laser groups can be adjusted according to actual needs, enhancing the adaptability of the protective device. The fixed transmitter and receiver form a stopping zone, stopping the equipment when an object enters, ensuring personnel safety. The movable transmitter and receiver form a deceleration zone, slowing the equipment down in advance to avoid impact from sudden stops. On the other hand, when manual intervention is required, the screw machine continues to operate without stopping.

[0008] Preferably, the optical axis of the fixed laser group is parallel to the optical axis of the moving laser group.

[0009] By adopting the above technical solution, the optical axes of the fixed laser group and the moving laser group are parallel, which can ensure stable and effective light transmission.

[0010] Preferably, the adjustment mechanism includes a guide rail and a drive assembly. The guide rail is arranged parallel to the fixture and fixedly mounted on the base. The drive assembly is mounted on the guide rail and is used to drive the mobile transmitter and the mobile receiver to move along the guide rail.

[0011] By adopting the above technical solution, using a guide rail parallel to the fixture and fixed to the base, and a drive assembly mounted on the guide rail, the mobile transmitter and mobile receiver can be moved, thereby achieving adjustment of the relative position between the fixed laser group and the mobile laser group. Preferably, the drive assembly includes a drive motor, a lead screw keyed to the output shaft of the drive motor, and a movable base disposed at the bottom of the guide rail and cooperating with the lead screw. The movable transmitter and the movable receiver are fixedly mounted on the movable base.

[0012] By adopting the above technical solution, in the screw machine safety protection device, the drive motor drives the lead screw to rotate. The lead screw cooperates with the movable base, which can drive the movable transmitter and movable receiver installed on the movable base to move along the guide rail, realize the adjustment of the relative position between the fixed laser group and the movable laser group, and make the movable laser group flexibly change its position as needed. At the same time, the fixed laser group and the movable laser group cooperate to ensure the safety of the screw machine operation.

[0013] Preferably, it also includes a detection module connected to the movable base, the detection module being used to detect the position of the movable laser group relative to the fixture and to feed it back to the drive motor.

[0014] By adopting the above technical solution, based on the existing system which includes a fixed laser group and a moving laser group, with the optical axis of the fixed laser group parallel to the optical axis of the moving laser group, forming a stop zone and a deceleration zone respectively, and the adjustment mechanism using a guide rail and a drive assembly, the drive assembly using a drive motor, a lead screw, and a moving base, a detection module connected to the moving base is added. This module can detect the position of the moving laser group relative to the fixture and feed it back to the drive motor, thereby achieving precise control and real-time adjustment of the position of the moving laser group.

[0015] Preferably, the detection module includes a detection transmitter, a detection receiver, and two adjustment components. The adjustment components are fixedly mounted on the movable base, and the detection transmitter and the detection receiver are respectively connected to the adjustment components.

[0016] By adopting the above technical solution, a fixed laser group can detect whether an object enters the stop zone and thus control the equipment to stop. A mobile laser group, through an adjustment mechanism, adjusts its relative position to the fixed laser group, making the optical axes of the fixed and mobile laser groups parallel and forming a stop zone and a deceleration zone, thus achieving zoned protection. A drive component can move the mobile transmitter and mobile receiver along the guide rail to further adjust the position of the mobile laser group. A detection module, consisting of a detection transmitter, a detection receiver, and an adjustment component, is connected to a mobile base and can detect the position of the mobile laser group relative to the fixture and feed back to the drive motor, thereby precisely controlling the position of the mobile laser group.

[0017] Preferably, the optical axis formed by the detection transmitter and the detection receiver is parallel to the moving laser array.

[0018] By adopting the above technical solution, the distance between the detection module and the moving laser group can be controlled more precisely, thereby determining the relative position of the deceleration zone formed by the moving laser group and the fixture, which facilitates the adjustment mechanism to make position adjustments.

[0019] Preferably, the adjustment assembly includes a mounting base, a cylinder, a guide rod, and a moving platform. The mounting base is installed on the side of the moving base and has a sliding groove. The two ends of the guide rod are respectively connected to the cylinder and the moving platform and are located in the sliding groove. The detection transmitter and the detection receiver are fixedly installed on the moving platform.

[0020] By adopting the above technical solution, the positions of the detection transmitter and the detection receiver can be flexibly adjusted, which facilitates the accurate detection of the position of the moving laser group relative to the fixture. In turn, the drive motor can be controlled according to the detection results, ensuring the stability and accuracy of the screw machine safety protection device.

[0021] Limiting blocks are provided at both ends of the guide rail, and the working surface of the limiting blocks is provided with a buffer layer.

[0022] By adopting the above technical solution, limit blocks with buffer layers are set at both ends of the guide rail to prevent the mobile transmitter and mobile receiver from exceeding the travel range and causing damage. The buffer layer plays a buffering role to reduce impact and protect the equipment and components.

[0023] Preferably, it also includes an electrical control console, wherein the fixed transmitter, the fixed receiver, the mobile transmitter, the mobile receiver, and the drive motor are electrically connected to the electrical control console.

[0024] By adopting the above technical solutions, the electrical control console can uniformly control the fixed transmitter, fixed receiver, mobile transmitter, mobile receiver, and drive motor, enabling coordinated operation of each component and improving the automation level and operational stability of the screw machine safety protection device.

[0025] In summary, this application includes at least one of the following beneficial technical effects: 1. By setting up fixed laser groups and mobile laser groups, stopping zones and deceleration zones are formed, which can provide graded protection according to the distance of personnel or objects. Compared with existing protective measures, it can better adapt to complex production environments and ensure personnel safety. 2. The adjustment mechanism can adjust the relative position between the fixed laser group and the moving laser group, which can flexibly adapt to different working scenarios and workpiece sizes; 3. The detection module can detect the position of the moving laser group relative to the fixture and feed it back to the drive motor, enabling precise adjustment of the position of the moving laser group and improving the accuracy of protection. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of a screw machine safety protection device provided in an embodiment of this application; Figure 2 This is a plan view of the device in operation. Figure 3 yes Figure 1 A magnified view of part A in the diagram.

[0027] Explanation of reference numerals in the attached drawings: 1. Fixed laser assembly; 11. Fixed transmitter; 12. Fixed receiver; 2. Moving laser assembly; 21. Moving transmitter; 22. Moving receiver; 23. Adjustment mechanism; 231. Guide rail; 232. Drive assembly; 2321. Drive motor; 2322. Lead screw; 2323. Moving base; 3. Detection module; 31. Detection transmitter; 32. Detection receiver; 33. Adjustment assembly; 331. Mounting base; 332. Cylinder; 333. Guide rod; 334. Moving platform; 4. Limit block; 5. Electrical control console; 100. Screwdriver; 101. Electric screwdriver; 200. Fixture. Detailed Implementation

[0028] The technical solutions in the embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. The described embodiments are only possible technical implementations of this utility model, but are not limited thereto. Other embodiments obtained by those skilled in the art in conjunction with the embodiments of this utility model without creative effort are also within the protection scope of this utility model.

[0029] Screw machines, as commonly used automated assembly equipment, play an important role in the production lines of various electronic products and mechanical equipment. As the manufacturing industry continues to demand higher production precision and efficiency, the performance and functions of screw machines are also being continuously improved and optimized. However, when screw machines are working automatically, abnormalities may occur, requiring manual intervention. If operators do not strictly follow production safety regulations, injuries may occur. Furthermore, the fixtures used in the screw-making process come in many different types and sizes.

[0030] Manual intervention mainly falls into two categories: First, when unexpected malfunctions such as material jamming occur, operators must enter the work area for emergency handling. Second, when auxiliary operations are required (such as fine-tuning the workpiece position), operators can consciously enter the peripheral "deceleration zone" formed by the moving laser array. In this case, the device will not immediately trigger an emergency stop like a traditional light curtain, but will instead control the screw machine to slow down, allowing personnel to intervene while the equipment is running at a safe low speed. This avoids unnecessary downtime that could damage production efficiency and equipment lifespan. The "stop zone," closer to the core components, retains an absolutely safe emergency braking function. This application primarily adopts a zonal protection and adjustable laser array scheme, achieving flexible adaptation to different scenarios and providing graded protection to ensure safety. The following is a further detailed description of this application.

[0031] refer to Figure 1The screw machine safety protection device provided in this application embodiment includes a fixed laser group 1 and a movable laser group 2. The fixed laser group 1 is set and fixedly installed on the base of the screw machine 100 near the electric screwdriver 101. The movable laser group 2 is installed on both sides of the fixture 200 through an adjustment mechanism 23. The adjustment mechanism 23 is used to adjust the relative position between the fixed laser group 1 and the movable laser group 2, so as to flexibly adapt to different working scenarios and workpiece sizes and achieve the effect of graded protection to ensure personnel safety.

[0032] refer to Figure 1 and Figure 2 Specifically, the fixed laser assembly 1 includes a fixed transmitter 11 and a fixed receiver 12, located on opposite sides of the fixture 200. The fixed transmitter 11 can be a semiconductor laser or similar emitting device, characterized by its ability to stably emit a laser beam of a specific wavelength and intensity. It typically has a compact design for easy mounting on the base of the screw machine 100. Alternatively, a fiber laser can be used, offering higher beam quality and energy conversion efficiency. The fixed receiver 12 receives the laser beam emitted by the fixed transmitter 11 and generally employs a photodetector or similar device. Its housing is typically made of a material with strong anti-interference capabilities to ensure accurate reception of the laser signal. The fixed transmitter 11 and fixed receiver 12 are electrically connected to the electrical control system. When the laser beam is blocked, the fixed receiver 12 transmits a signal to the control system, triggering a corresponding safety mechanism.

[0033] refer to Figure 1 and Figure 2 Specifically, the mobile laser assembly 2 includes a mobile transmitter 21, a mobile receiver 22, and an adjustment mechanism 23. The adjustment mechanism 23 is fixedly mounted on both sides of the fixture 200, and the mobile transmitter 21 and mobile receiver 22 are mounted on the adjustment mechanism 23. Similar to the fixed transmitter 11, the mobile transmitter 21 can also be a semiconductor laser or a fiber laser, and its position can change with the movement of the adjustment mechanism 23 to adapt to different protection requirements. The mobile receiver 22 also uses a photodetector or similar device to receive the laser beam emitted by the mobile transmitter 21. The adjustment mechanism 23 includes a guide rail 231 and a drive assembly 232. The guide rail 231 is parallel to the fixture 200 and fixedly mounted on the base. The guide rail 231 is generally a linear guide rail 231, which features high precision and high rigidity, and its surface is precision machined and heat-treated to ensure smooth movement. The drive assembly 232 is mounted on the guide rail 231 and is used to drive the mobile transmitter 21 and mobile receiver 22 to move along the guide rail 231.

[0034] refer to Figure 1 and Figure 3The drive assembly 232 includes a drive motor 2321, a lead screw 2322 keyed to the output shaft of the drive motor 2321, and a movable base 2323 disposed at the bottom of the guide rail 231 and engaging with the lead screw 2322. The drive motor 2321 is typically a stepper motor or a servo motor, offering precise control and high torque output. Alternatively, a brushless DC motor can be used, offering advantages such as high efficiency and long lifespan. The lead screw 2322 is keyed to the output shaft of the drive motor 2321. When the drive motor 2321 rotates, the lead screw 2322 rotates accordingly, thereby driving the movable base 2323 to move along the guide rail 231. The movable base 2323 engages with the lead screw 2322 via a threaded pair, and a nut is provided inside. The nut meshes with the thread of the lead screw 2322, achieving force transmission. The mobile transmitter 21 and the mobile receiver 22 are fixedly mounted on the mobile base 2323, so that when the mobile base 2323 moves, the mobile transmitter 21 and the mobile receiver 22 also move. Although this embodiment discloses a drive mechanism based on a motor and a lead screw, those skilled in the art will recognize that other known linear motion systems, such as rack and pinion mechanisms, cylinder drive mechanisms, or linear motors, can also be used to achieve the function of adjusting the position of the mobile laser array, and these alternative solutions do not depart from the protection concept of this utility model.

[0035] Furthermore, the optical axis of the fixed laser group 1 is parallel to the optical axis of the movable laser group 2. The fixed transmitter 11 and the fixed receiver 12 form a stop zone, while the movable transmitter 21 and the movable receiver 22 form a deceleration zone. When the laser beam emitted by the movable transmitter 21 is not blocked, the fixed laser group 1 does not operate, reducing the energy consumption of the equipment. When an object enters the deceleration zone, i.e., when the laser beam emitted by the movable transmitter 21 is blocked, the screw machine 100 decelerates. When an object enters the stop zone, i.e., when the laser beam emitted by the fixed transmitter 11 is blocked, the screw machine 100 stops operating, thereby achieving graded protection.

[0036] refer to Figure 1 and Figure 3Furthermore, it also includes a detection module 3, which is connected to the movable base 2323. The detection module 3 is used to detect the position of the moving laser group relative to the fixture 200 and feed it back to the drive motor 2321. The detection module 3 includes a detection transmitter 31, a detection receiver 32, and two adjustment components 33. The adjustment components 33 are fixedly mounted on the movable base 2323. The detection transmitter 31 and the detection receiver 32 are respectively connected to the adjustment components 33. The detection transmitter 31 can also be a semiconductor laser or a fiber laser, etc., and the detection receiver 32 can also be a photodetector. It can receive signals and convert them into electrical signals to feed back to the drive motor 2321. The drive motor 2321 adjusts the position of the moving transmitter 21 and the moving receiver 22 according to the feedback signals. During installation, the laser beam from the detector transmitter 31 is blocked by the fixture 200, and the detector receiver cannot detect any signal input. As the moving base 2323 moves, the laser beam from the detector transmitter 31 gradually moves away from the range of the fixture 200. When the detector receiver 32 detects the signal, it feeds back to the control system to stop the drive motor 2321. The optical axis formed by the detector transmitter 31 and the detector receiver 32 is parallel to the moving laser group 2. The detection module 3 is used to automatically set the reference position of the moving laser group 2 relative to a specific fixture 200 during the calibration procedure after initial installation or replacement of different fixtures 200. In calibration mode, the controller drives the motor 2321 to move the moving base 2323 until the detection beam emitted by the detection module 3 is just not blocked by the fixture 200. At the moment this state change is detected, the controller records the current position of the moving base 2323 and sets it as the safety boundary of the deceleration zone.

[0037] refer to Figure 3 The adjustment assembly 33 includes a mounting base 331, a cylinder 332, a guide rod 333, and a moving platform 334. The mounting base 331 is installed on the side of the moving base 2323 and has a sliding groove. The two ends of the guide rod 333 are connected to the cylinder 332 and the moving platform 334 respectively and are located in the sliding groove. The detection transmitter 31 and the detection receiver 32 are fixedly installed on the moving platform 334. The cylinder 332 pushes the guide rod 333 to slide in the sliding groove, thereby driving the moving platform 334 to move, realizing the fine adjustment of the position of the detection transmitter 31 and the detection receiver 32, and thus adjusting the relative position with the moving laser group 2, so that the position of the deceleration zone can be adjusted according to the actual scene requirements.

[0038] refer to Figure 1 and Figure 3In addition, limit blocks 4 are provided at both ends of the guide rail 231, and the working surface of the limit blocks 4 is provided with a buffer layer. The limit blocks 4 are generally made of metal and have a certain strength and rigidity. The buffer layer can be made of rubber or polyurethane, etc. When the moving base 2323 moves to both ends of the guide rail 231, the buffer layer can play a buffering role to avoid hard collision between the moving base 2323 and the limit blocks 4, and protect the equipment from damage.

[0039] The fixed transmitter 11, fixed receiver 12, mobile transmitter 21, mobile receiver 22, drive motor 2321, detection transmitter 31, detection receiver 32 and cylinder 332 are all controlled by the electrical control console 5, which integrates a signal detection and transmission module.

[0040] The implementation principle of a screw machine safety protection device according to an embodiment of this application is as follows: During installation, the laser beam of the detection transmitter 31 is blocked by the fixture 200, and the detection receiver cannot detect the signal input. As the moving base 2323 moves, the laser beam of the detection transmitter 31 gradually moves away from the range of the fixture 200. When the detection receiver 32 detects the signal, it feeds back to the control system to control the drive motor 2321 to stop. When the laser beam emitted by the moving transmitter 21 is not blocked, the fixed laser group 1 does not work, reducing the energy consumption of the equipment. When an object enters the deceleration zone, that is, when the laser beam emitted by the moving transmitter 21 is blocked, the screw machine 100 decelerates. When an object enters the stop zone, that is, when the laser beam emitted by the fixed transmitter 11 is blocked, the screw machine 100 stops running, thereby achieving graded protection.

[0041] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A safety guard for a screw machine, characterized in that include: A fixed laser assembly (1) is disposed and fixedly mounted on the base of the screwdriver (100) near the electric screwdriver (101). The fixed laser assembly (1) includes a fixed transmitter (11) and a fixed receiver (12). The fixed transmitter (11) and the fixed receiver (12) are respectively located on both sides of the fixture (200). The fixed transmitter (11) and the fixed receiver (12) form a stop area. The mobile laser group (2) includes a mobile transmitter (21), a mobile receiver (22), and an adjustment mechanism (23). The mobile transmitter (21) and the mobile receiver (22) form a deceleration zone. The adjustment mechanism (23) is fixedly installed on both sides of the fixture (200). The mobile transmitter (21) and the mobile receiver (22) are mounted on the adjustment mechanism (23). The adjustment mechanism (23) is used to adjust the relative position between the fixed laser group (1) and the mobile laser group (2).

2. A safety guard for a screw machine as claimed in claim 1, wherein: The optical axis of the fixed laser group (1) is parallel to the optical axis of the moving laser group (2).

3. The screw machine safety protection device according to claim 2, characterized in that: The adjustment mechanism (23) includes a guide rail (231) and a drive assembly (232). The guide rail (231) is set parallel to the fixture (200) and fixedly mounted on the base. The drive assembly (232) is mounted on the guide rail (231) and is used to drive the mobile transmitter (21) and the mobile receiver (22) to move along the guide rail (231).

4. A screw machine safety protection device according to claim 3, characterized in that: The drive assembly (232) includes a drive motor (2321), a lead screw (2322) keyed to the output shaft of the drive motor (2321), and a movable base (2323) disposed at the bottom of the guide rail (231) and cooperating with the lead screw (2322). The movable transmitter (21) and the movable receiver (22) are fixedly mounted on the movable base (2323).

5. A screw machine safety protection device according to claim 4, characterized in that: It also includes a detection module (3), which is connected to the movable base (2323). The detection module (3) is used to detect the position of the movable laser group (2) relative to the fixture (200) and feed it back to the drive motor (2321).

6. A screw machine safety protection device according to claim 5, characterized in that: The detection module (3) includes a detection transmitter (31), a detection receiver (32), and two adjustment components (33). The adjustment components (33) are fixedly installed on the movable base (2323), and the detection transmitter (31) and the detection receiver (32) are respectively connected to the adjustment components (33).

7. A screw machine safety protection device according to claim 6, characterized in that: The optical axis formed by the detection transmitter (31) and the detection receiver (32) is parallel to the moving laser array (2).

8. A screw machine safety protection device according to claim 6, characterized in that: The adjustment assembly (33) includes a mounting base (331), a cylinder (332), a guide rod (333), and a moving platform (334). The mounting base (331) is installed on the side of the moving base (2323) and has a sliding groove. The two ends of the guide rod (333) are connected to the cylinder (332) and the moving platform (334) respectively and are located in the sliding groove. The detection transmitter (31) and the detection receiver (32) are fixedly installed on the moving platform (334).

9. A screw machine safety protection device according to claim 3, characterized in that: The guide rail (231) is provided with limit blocks (4) at both ends, and the working surface of the limit block (4) is provided with a buffer layer.

10. A screw machine safety protection device according to claim 4, characterized in that: It also includes an electrical control console (5), and the fixed transmitter (11), the fixed receiver (12), the mobile transmitter (21), the mobile receiver (22) and the drive motor (2321) are electrically connected to the electrical control console (5).

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