Screw length detection mechanism

Abstract

The utility model relates to a screw length detection mechanism, which aims to solve the technical problems that the lengths of screws are required to be measured one by one in the current traditional detection method, overlong or overshort screws are difficult to quickly and accurately screen out, and the product quality and the detection efficiency are influenced, and comprises a bottom plate and a detection plate, the top end of the detection plate is fixedly connected with a plurality of equidistant pressure sensors, inductive heads of the pressure sensors are located on the bottom surface of the detection plate, the top end of the detection plate is fixedly connected with an electric cylinder, the electric cylinder is fixedly connected with the bottom surface of a sliding block, and the sliding block is transversely and slidably connected with the surface of an electric sliding rail. According to the screw screening device, the detection plate is arranged, the detection plate is set to the set height of the size of a screw in advance, then the detection plate is driven by the electric sliding rail and the sliding block to move transversely as a whole, and overlong screws can be pushed out when the screws reach the position, so that rapid screening is completed, measuring one by one is not needed, and the screening efficiency is improved. And the detection efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of screw detection technology, specifically a screw length detection mechanism. Background Technology

[0002] In modern manufacturing, screws are key fasteners widely used in automobiles, machinery, electronic products, construction and other fields. The quality of screws directly affects the overall performance, stability and safety of products. Among them, the length of screws is one of the key parameters to ensure their correct installation and proper functioning.

[0003] Traditional screw length inspection often suffers from low efficiency. Traditional methods may require measuring the length of each screw individually, which is not only time-consuming and labor-intensive, but also prone to measurement errors due to human factors. It is difficult to quickly and accurately screen out screws that are too long or too short, affecting product quality and inspection efficiency, and failing to meet the needs of modern manufacturing for high-precision and high-efficiency inspection. Utility Model Content

[0004] The purpose of this utility model is to overcome the shortcomings of the existing technology, adapt to the needs of reality, and provide a screw length detection mechanism to solve the technical problem that the current traditional detection method may require measuring the length of each screw individually, making it difficult to quickly and accurately screen out screws that are too long or too short, thus affecting product quality and detection efficiency.

[0005] To achieve the purpose of this utility model, the technical solution adopted by this utility model is as follows: a screw length detection mechanism is designed, including a base plate and a detection plate. Several equidistant pressure sensors are fixedly connected to the top of the detection plate. The sensing head of the pressure sensor is located on the bottom surface of the detection plate. An electric cylinder is fixedly connected to the top of the detection plate. The electric cylinder is fixedly connected to the bottom surface of the slider. The slider slides laterally on the surface of the electric slide rail. The electric slide rail is fixedly connected to the lower surface of the top of the support frame.

[0006] In this solution, the detection plate is set to a predetermined height to reach the screw size. Then, driven by the electric slide rail and slider, the entire plate moves horizontally. When it reaches the screw, the excessively long screw can be pushed out, thus completing rapid screening without the need for individual measurement, which improves the efficiency of detection.

[0007] Preferably, a plurality of placement slots are provided at the top edge of the base plate, and two electric push rods are fixedly connected to the bottom surface of the base plate. The telescopic ends of the electric push rods penetrate the surface of the base plate and are fixedly connected to the bottom of the lifting plate. A plurality of equidistant pressure blocks are fixedly connected to the surface of the lifting plate facing the placement slots.

[0008] In practical applications, the included angle of the placement slot can quickly position the screw, and the lifting plate rises and falls under the drive of the electric actuator, so that the pressure block can contact the end of the screw to position the screw and improve the stability of the screw.

[0009] Preferably, a vertical rod is fixedly connected to the bottom surface of the slider on one side of the electric cylinder, a sleeve block is sleeved on the surface of the vertical rod, one side surface of the sleeve block is fixedly connected to the detection plate, and scale lines are opened on the surface of the sleeve block.

[0010] In practical applications, the socket block slides on the vertical rod, which can increase the stability of the detection plate and visually display the length of the screw.

[0011] Preferably, a fixing frame is fixedly connected to the other side surface of the socket block, and a laser rangefinder is fixedly connected to the top of the fixing frame.

[0012] In practical applications, the laser rangefinder emits a laser beam downwards, and the measured data is the current length of the screw, which is convenient and quick.

[0013] Preferably, the support frame is fixedly connected to the side wall of the base plate, and a detection groove is formed on the top surface of the base plate on one side of the support frame.

[0014] In practical applications, the detection slot and the placement slot are located on the same plane. The main purpose is to provide a reflection position for the laser so that the laser rangefinder can directly measure the screw length when it moves to the base plate.

[0015] Preferably, the lifting plate has a storage groove on the side wall facing the support frame, and a rotating rod is rotatably connected to the inner side of the storage groove.

[0016] In practical applications, the rotating rod can block the laser. Since its top and the bottom of the pressure block are on the same plane, the length of the screw with the removed end can be measured.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0018] 1. This utility model sets a detection plate at a predetermined height relative to the screw size. Then, driven by an electric slide rail and a slider, the plate moves horizontally as a whole. When it reaches the screw, it can push out any excessively long screws, thus completing rapid screening without the need for individual measurement and improving detection efficiency.

[0019] 2. This utility model uses a pressure sensor on the surface of the detection plate. After a long screw is pushed out, it reaches the top of the placement slot and moves downward under the drive of an electric cylinder until it contacts the top of the screw. According to the data from the pressure sensor, the placement slot where no pressure data is generated contains screws that are too short. In this way, screws of different lengths can be quickly and accurately screened out, further improving the accuracy and efficiency of the detection. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a side view of the structure of this utility model;

[0022] Figure 3 This is a schematic diagram of the rotating plate structure of this utility model;

[0023] In the diagram: 1. Base plate; 101. Placement slot; 102. Detection slot; 2. Electric push rod; 3. Lifting plate; 301. Pressure block; 4. Support frame; 5. Electric slide rail; 501. Slider; 6. Vertical rod; 601. Scale line; 7. Electric cylinder; 8. Detection plate; 801. Pressure sensor; 9. Sleeve block; 901. Fixing frame; 10. Laser rangefinder; 11. Storage slot; 12. Rotating rod. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0025] Example 1: A screw length detection mechanism, see Figures 1 to 3The system includes a base plate 1 and a detection plate 8. The top edge of the base plate 1 has several placement slots 101, with the sidewalls of the slots 101 forming a 120-degree angle to facilitate screw placement. During placement, the screw can be quickly positioned by adhering to the sidewall of the slot, ensuring it is in a vertical position. An electric cylinder 7 is fixedly connected to the top of the detection plate 8. The electric cylinder 7 is typically equipped with a high-resolution servo motor and driver. These devices enable precise control of position, speed, and force. The closed-loop control characteristics of the servo motor allow the electric cylinder 7 to adjust its output in real time to compensate for any external interference or internal errors, thus ensuring accuracy when moving the detection plate 8 up and down. Cylinder 7 is fixedly connected to the bottom surface of slider 501. Slider 501 slides laterally on the surface of electric slide rail 5. Electric slide rail 5 is fixedly connected to the lower surface of the top of support frame 4. When the screw is placed and the inspection begins, electric cylinder 7 first drives the detection plate 8 to the rated height of the screw. At this time, the distance between the bottom surface of the detection plate 8 and the bottom surface of the placement groove 101 is the height of the screw. After the height is adjusted, slider 501 moves laterally along electric slide rail 5. During the movement, the detection plate 8 will push the screws that are higher than the set height out of the placement groove 101, thereby quickly screening out the excessively long screws without measuring the height one by one, thus improving the efficiency of the inspection.

[0026] It should be noted that the edges of the placement slot 101 are rounded, and the surface of the placement slot 101 is relatively smooth. When the screw is attached to the corner of the placement slot 101, a part of the bottom will be suspended due to the rounded corner. Therefore, when pushed by the detection plate 8, it will be pushed out normally and will not get stuck.

[0027] Specifically, such as Figure 1 and Figure 2 As shown, two electric actuators 2 are fixedly connected to the bottom surface of the base plate 1. The telescopic ends of the electric actuators 2 penetrate the surface of the base plate 1 and are fixedly connected to the bottom of the lifting plate 3. Several sets of equidistant pressure blocks 301 are fixedly connected to the surface of the lifting plate 3 facing the placement slot 101. The pressure blocks 301 are in pairs and their function is to position the screw. When the screw is in contact with the first 20-degree angle of the placement slot 101, the electric actuator 2 starts to shorten, bringing the lifting plate 3 and the pressure blocks 301 down. During the descent, the pressure blocks 301 will contact the end of the bolt, thereby restricting the bolt and ensuring its stability in the subsequent measurement process.

[0028] Furthermore, such as Figure 2As shown, several equidistant pressure sensors 801 are fixedly connected to the top of the detection plate 8. The sensing heads of the pressure sensors 801 are located on the bottom surface of the detection plate 8. A level position prevents excessively short screws from contacting the sensing heads of the pressure sensors 801. A vertical rod 6 is fixedly connected to the bottom surface of the slider 501 on one side of the electric cylinder 7. A sleeve block 9 is fitted onto the surface of the vertical rod 6. The extension and retraction of the electric cylinder 7 causes the sleeve block 9 to move up and down on the surface of the vertical rod 6. The data on the scale line 601 corresponding to the bottom surface of the sleeve block 9 is the length of the screw. One side surface of the sleeve block 9 is fixedly connected to the detection plate 8. The surface of the sleeve block 9 has a scale line 601. The scale line 601 allows for a rough observation of the current screw length data. It does not precisely indicate the screw length data, but only facilitates observation of the approximate length of the screw, thus facilitating subsequent electric... The cylinder 7 is adjusted, the socket block 9 has self-lubricating properties, the vertical rod 6 is made of chrome-plated steel rod with high surface hardness and rust resistance, and the scale line 601 is processed by laser etching process to ensure long-term clarity; after the detection plate 8 pushes out the excessively long screw and reaches directly above the screw, the electric cylinder 7 starts, driving the detection plate 8 to descend, thereby squeezing the screw downward. The screw contacts the sensing head at the bottom of the pressure sensor 801, and the generated pressure data is transmitted to the display screen. The excessively short screw cannot contact the pressure sensor 801 above, so no pressure data is generated. Thus, screws of normal length are quickly screened based on the pressure data. By moving the detection plate 8 horizontally and vertically, the screening of excessively long and excessively short screws is completed, improving the detection efficiency. It is worth mentioning that the pressure sensor 801 is a piezoresistive sensor, and its sensing head has a built-in micro strain gauge. When the detection plate 8 is pressed down to contact the top of the screw, the vertical force applied by the screw causes the strain gauge to deform, resulting in a change in the resistance value of the internal Wheatstone bridge, which in turn outputs a voltage signal proportional to the pressure. The pressure sensor 801 is connected to the data collection device through a normal ribbon cable and can display the pressure data in real time. Since the pressure sensor 801 is an existing device that can be purchased on the market, its internal structure and specific working principle will not be described in detail.

[0029] It is worth noting that, such as Figure 3As shown, the support frame 4 is fixedly connected to the side wall of the base plate 1. A detection groove 102 is provided on the top surface of the base plate 1 on one side of the support frame 4. The horizontal surface of the detection groove 102 is on the same horizontal plane as the horizontal surface of the placement groove 101, which facilitates the detection of the laser rangefinder 10. When the laser rangefinder 10 moves with the detection plate 8 and the socket block 9, the laser emitted by it will move from the surface of the support frame 4 to the surface of the detection groove 102. The part of the support frame 4 connected to the detection groove 102 is on the same horizontal plane, thus achieving seamless connection and keeping the measured data unchanged. It is worth mentioning that the laser rangefinder 10 adopts the phase-type distance measurement principle, which emits modulated laser and calculates the distance through the phase difference of the reflected light. Its measurement accuracy is very high and can be used to assist in calibrating the initial height of the detection plate 8 or to directly measure the effective length of the screw after removing the end (such as the screw head).

[0030] It is worth noting that, such as Figure 3 As shown, a storage groove 11 is provided on the side wall of the lifting plate 3 facing the support frame 4. A rotating rod 12 is rotatably connected to the inner side of the storage groove 11. The top surface of the rotating rod 12 and the bottom surface of the pressure block 301 are on the same plane. Since the bottom surface of the pressure block 301 is in contact with the end of the screw, after the rotating rod 12 rotates out of the storage groove 11, the laser emitted by the laser rangefinder 10 will reach the surface of the rotating rod 12. The data measured at this time is the length of the screw after the end is removed. The device improves its practicality by allowing users to choose whether to measure the length of the screw after the end is removed according to actual needs. The rotation of the rotating rod 12 has a damping effect, thereby improving the stability of the rotating rod 12 when it is stationary.

[0031] It is worth noting that, such as Figure 2 and Figure 3 As shown, a fixing frame 901 is fixedly connected to the other side surface of the socket block 9. A laser rangefinder 10 is fixedly connected to the top of the fixing frame 901. Because of the fixing frame 901, the laser rangefinder 10 moves up and down or laterally with the detection plate 8 and the socket block 9. The position of the laser emitted by the laser is at the same height as the bottom surface of the detection plate 8. Therefore, the height it measures downward is the height of the screw. When it is not necessary to sieve the screws of different lengths and only needs to detect the screw height, the laser rangefinder 10 can directly measure the length with the detection plate 8, which is convenient and quick. It can also assist the electric cylinder 7 in adjusting the height of the detection plate 8, which improves the practicality and convenience of the device.

[0032] In addition, all components designed in this utility model are general standard parts or components known to those skilled in the art. Their structure and principle can be learned by those skilled in the art through technical manuals or conventional experimental methods. Those skilled in the art can fully implement them, so there is no need to elaborate. The content protected by this utility model does not involve improvements to the internal structure and method.

[0033] The embodiments disclosed herein are preferred embodiments, but are not limited thereto. Those skilled in the art can readily grasp the spirit of this utility model based on the above embodiments and make different extensions and variations. However, as long as they do not depart from the spirit of this utility model, they are all within the protection scope of this utility model.

Claims

1. A screw length detection mechanism, comprising a base plate (1) and a detection plate (8), characterized in that, The top of the detection plate (8) is fixedly connected to several equidistant pressure sensors (801). The sensing head of the pressure sensor (801) is located on the bottom surface of the detection plate (8). The top of the detection plate (8) is fixedly connected to an electric cylinder (7). The electric cylinder (7) is fixedly connected to the bottom surface of the slider (501). The slider (501) is laterally slidably connected to the surface of the electric slide rail (5). The electric slide rail (5) is fixedly connected to the lower surface of the top of the support frame (4).

2. The screw length detection mechanism as described in claim 1, characterized in that, The bottom edge of the base plate (1) is provided with several placement slots (101). Two electric push rods (2) are fixedly connected to the bottom surface of the base plate (1). The telescopic ends of the electric push rods (2) penetrate the surface of the base plate (1) and are fixedly connected to the bottom of the lifting plate (3). Several sets of equidistant pressure blocks (301) are fixedly connected to the surface of the lifting plate (3) facing the placement slots (101).

3. The screw length detection mechanism as described in claim 1, characterized in that, A vertical rod (6) is fixedly connected to the bottom surface of the slider (501) on one side of the electric cylinder (7). A sleeve block (9) is sleeved on the surface of the vertical rod (6). One side surface of the sleeve block (9) is fixedly connected to the detection plate (8). A scale line (601) is opened on the surface of the sleeve block (9).

4. The screw length detection mechanism as described in claim 3, characterized in that, A fixing frame (901) is fixedly connected to the other side surface of the socket block (9), and a laser rangefinder (10) is fixedly connected to the top of the fixing frame (901).

5. The screw length detection mechanism as described in claim 1, characterized in that, The support frame (4) is fixedly connected to the side wall of the base plate (1), and a detection groove (102) is provided on the top surface of the base plate (1) on one side of the support frame (4).

6. The screw length detection mechanism as described in claim 2, characterized in that, The lifting plate (3) has a storage groove (11) on the side wall facing the support frame (4), and a rotating rod (12) is rotatably connected to the inner side of the storage groove (11).

Images