Automatic feeding type performance detection system and method based on VVT chain wheel

Abstract

The invention discloses an automatic feeding type performance detection system and method based on a VVT chain wheel, and relates to the technical field of chain wheel testing, and the system comprises a testing machine, a testing table top is installed in the testing machine, a control module is installed outside the testing machine, a driving module is installed outside the testing table top, and the control module comprises a controller, a sensor and a driver. The movement distance of the driving cylinder is controlled by the controller, and when the rotating speed of the driving motor is increased to enter a high-rotating-speed test stage, the driving cylinder further moves downwards, and the triggering shaft extrudes the interior of the fitting bin, so that the rubber gasket is extruded out of the through groove, and the dynamic enhancement of the locking force is realized; the process can effectively cope with a larger movement trend of the chain wheel caused by factors such as centrifugal force and vibration at a high rotating speed, prevents the chain wheel from loosening or displacing during high-speed rotation, ensures the safety and stability of high-rotating-speed test, and avoids equipment damage or test interruption caused by locking failure.

Description

Technical Field

[0001] The present invention relates to the technical field of sprocket testing, and particularly to an automatic feeding type performance detection system and method based on a VVT sprocket. Background Art

[0002] A VVT sprocket performance detector is a testing device dedicated to automotive sprockets, mainly used to detect key performance indicators such as the durability, transmission efficiency, and frictional torque of sprockets. By simulating the load and speed under actual working conditions, this device conducts fatigue tests on sprockets to ensure their reliability during high-intensity operation. With high-precision sensors and an automated control system, it can collect data in real time and generate analysis reports to assist in optimizing sprocket designs or verifying product quality.

[0003] However, the existing technology still has the following defects during specific use: 1. The existing technology usually adopts a locking method with a single fixed force, and its locking force remains unchanged throughout the operation of the device. It cannot be dynamically adjusted according to the changes in the detection stage. During the low-speed operation stage at the initial startup of the device, due to the inability of the locking force to adapt to the low-speed working conditions, two extreme situations are likely to occur: if the locking force is too large, it will cause excessive extrusion of the sprocket, resulting in abnormal local stress on the sprocket and affecting its free rotation; if the locking force is insufficient, it will be difficult to effectively limit the shaking and offset of the sprocket. Both of these situations will cause deviations in detection data such as frictional torque at low speeds, and cannot truly reflect the actual performance of the sprocket, making the detection results lose their reference value.

[0004] At the same time, the existing locking technology lacks the ability to simulate the complex stress state during the actual operation of the sprocket. Its constant locking force setting is disconnected from the dynamic stress changes caused by speed and load fluctuations during the actual operation of the automotive engine. In practical applications, the constraints and loads on the sprocket will be dynamically adjusted with the change of engine working conditions, but the traditional locking method cannot make corresponding adjustments following these changes, resulting in a large difference between the detection process and the actual working conditions. Therefore, the obtained performance detection data is difficult to comprehensively and accurately reflect the performance of the sprocket in the real working environment, greatly weakening the guiding significance of the detection results for product design and optimization.

[0005] 2. The existing technology uses a single-axis direct drive sprocket rotation method. Its power transmission relies only on a single axis and cannot balance the force difference on both sides of the sprocket. Due to single-axis drive, the sprocket is prone to generate lateral stress due to eccentric loads or slight errors in transmission components during rotation, causing the sprocket to skew or locally wear. This uneven force will directly cause the friction torque data to fluctuate violently during the detection process, and cannot accurately reflect the true performance of the sprocket. For example, under low-speed conditions, the single-axis driven sprocket may cause excessive local contact stress due to initial installation deviation, making the friction torque measurement value inflated; at high speeds, the deflected sprocket is more likely to cause vibration, further interfering with data stability, and ultimately leading to large errors in the detection results, which cannot provide a reliable basis for product optimization and seriously affect production quality control.

[0006] In addition, traditional testing equipment mostly uses fixed loading methods, such as constant gravity block loading or simple spring resistance loading, which cannot dynamically adjust the load according to changes in speed. The resistance parameters of this type of loading device are pre-set before testing and cannot respond to the increased load demand of the sprocket due to increased speed during actual operation. For example, when testing high-speed conditions, the resistance provided by the fixed loading device cannot simulate the dynamic load that the sprocket bears when the engine is running at high speed, resulting in the test results being out of line with the actual working conditions; and at low speeds, excessive fixed resistance may excessively restrict the movement of the sprocket, causing data distortion. This static loading method makes the test data lack adaptability to working conditions and cannot fully evaluate the performance of the sprocket in complex environments. It is easy to miss potential design defects or quality problems, increasing the risk of product failure in actual applications.

[0007] In view of this, the present invention proposes an automatic feeding performance detection system and method based on a VVT sprocket to remedy and improve the shortcomings of the existing technology. Summary of the Invention

[0008] In order to solve the above technical problems, the present invention provides an automatic feeding performance detection system and method based on VVT sprockets to solve the technical problems raised in the above background technology.

[0009] To achieve the above object, in a first aspect, the technical solution adopted by the present invention is as follows: An automatic feeding type performance detection system based on a VVT sprocket, which is used to detect the performance of the sprocket body, includes a testing machine. A testing table is installed inside the testing machine, and a control module is installed outside the testing machine. A driving module is installed outside the testing table, and a speed change locking mechanism is arranged above the testing table. The speed change locking mechanism includes a support frame installed on the side wall of the testing table. A limiting disk is fixedly connected to the lower surface of the support frame. A fitting bin is evenly installed inside the limiting disk. The end part of the fitting bin is composed of a horizontal shaft and a vertical shaft in combination, and the vertical shaft is designed with a hollow, and a rubber gasket is filled inside it. A through groove is evenly opened on one side of the fitting bin close to the sprocket body. A driving disk is installed outside the fitting bin.

[0010] Further, the fitting bins are initially in a dispersed state. The fitting bins are used to fit on the outer side wall of the sprocket body for locking. When the sprocket body is subjected to a high-speed test, the control module drives the vertical part inside the fitting bin, so that the internal rubber gasket is extruded from the position of the through groove, so as to increase the locking force to adapt to the high-speed test and form a load on the sprocket body.

[0011] Further, the control module includes a controller, a sensor and a driver. The driver is used to convert the output weak electrical signal into a strong electrical signal capable of driving an actuator. The driving module includes a driving motor and a driving cylinder. The movement of the driving cylinder is controlled by the controller to move a distance.

[0012] Further, the whole support frame is slidably connected to the inner side wall of the testing table. The support frame is fixedly connected to the limiting disk. Curved grooves are evenly penetrated on the surface of the driving disk. The fitting bin is slidably connected to the driving disk through the curved grooves. The limiting disk and the fitting bin are slidably connected by the rotation drive of the driving disk.

[0013] Further, a nut ring is fixedly connected to the inside of the driving disk. The lower end of the output shaft of the driving cylinder in the driving module is movably connected to a threaded shaft corresponding to the position of the nut ring. A ball screw structure is formed between the nut ring and the threaded shaft.

[0014] Further, a trigger shaft is fixedly connected to the outer wall of the threaded shaft. When the fitting bin moves to the outer wall of the sprocket body, the vertical shaft in the fitting bin is directly below the trigger shaft.

[0015] Furthermore, a variable speed load mechanism is provided under the test table, and the variable speed load mechanism includes a transmission member installed on the outside of the output shaft of the drive motor of the drive module, and drive shafts are symmetrically installed on both sides of the output shaft of the drive motor. The transmission member as a whole includes no less than three pulleys and transmission belts, and the pulleys in the transmission member are respectively fixedly connected to the output shaft of the drive motor and the outer wall of the drive shaft, and the drive shaft and the output shaft of the drive motor are synchronously connected through the transmission member.

[0016] Furthermore, the upper surface of the drive shaft is fixedly connected with a drive gear, and the side of the drive gears close to each other is meshed with a linkage gear, and the linkage gear is rotatably connected to the lower surface of the test table, and the sprocket body is installed above the linkage gear through the test table.

[0017] Furthermore, the lower surface of the driving shaft is fixedly connected to a magnet shaft, the lower surface of the magnet shaft is rotatably connected to a magnetic member, and the magnetic member is rotatably connected to the outer wall of the output shaft of the driving motor in the driving module.

[0018] Furthermore, the surface of the magnetic attraction member is installed with no less than six magnetic pieces, and each two symmetrically distributed magnetic pieces form a group. The magnetic strength of each group of magnetic pieces gradually increases, and the lower surface of the magnet shaft is the magnetic positive pole. The upper surface of the magnetic piece in the magnetic attraction member is also a uniform magnetic positive pole. When the speed of the driving motor in the driving module is increased to perform a high-speed test, the magnetic attraction member and the magnet shaft are rotated to the corresponding position so that the magnetic piece with higher magnetic strength corresponds to the magnet shaft position at the lower end of the driving shaft, so as to increase the resistance to the synchronous rotation of the driving shaft and load the sprocket body.

[0019] In a second aspect, the present invention proposes an automatic feeding performance detection method based on a VVT sprocket, comprising the following steps: S1: Device power-on: Turn on the main power of the device and the power of the industrial computer at the same time; S2: Preparation before the shift: Turn on the air source to supply air to the equipment, confirm the tooling, select the corresponding sprocket body to be tested and the test formula according to the product model, and ensure that the equipment is reset and the drive components in the drive module are returned to zero; S3: Appearance inspection: Visually inspect the product appearance and conduct 100% visual inspection according to the appearance inspection instructions or defect comparison chart; S4: Loading: Place the sprocket body on the test table and make sure that the sprocket body is completely placed in the test table base; S5: Performance test: After the emergency stop, grating, air source, automatic, and product are all correct, press the test button with both hands to start the test and put the unqualified products into the unqualified material box; S6: Shutdown: Turn off the industrial computer, turn off the main power of the equipment, turn off the gas source, and release the internal pressure of the equipment; S7: Turnover: Put the unqualified parts into the red box for unqualified products, and put the qualified parts into the green plastic box. When stacking them, use a partition for each layer, and the height of the product shall not be higher than the height of the material box. S8: Maintenance: Clean the workbench surface, sort out the test pieces and the pieces to be tested, and manage the unqualified products according to the unqualified product process to avoid material mixing.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows: (1) In the initial stage of equipment startup, the driving cylinder drives the threaded shaft to cooperate with the nut ring, and drives the driving disc to make the scattered fitting bins fit on the outer wall of the sprocket to complete the preliminary locking, ensuring that the sprocket is in a stable state at the initial stage of the test, and avoiding problems such as shaking and offset of the sprocket during low-speed operation due to loose or too tight fixation, so that the detection data such as the friction torque at low speed is true and effective.

[0021] Adapting to high-speed test requirements: When the rotational speed of the driving motor increases and enters the high-speed test stage, the driving cylinder moves further downward, and the trigger shaft squeezes the inside of the fitting bin, causing the rubber gasket to be extruded from the through groove, realizing the dynamic enhancement of the locking force. This process can effectively cope with the greater movement tendency of the sprocket due to factors such as centrifugal force and vibration at high speed, prevent the sprocket from loosening or displacing during high-speed rotation, ensure the safety and stability of the high-speed test, and avoid equipment damage or test interruption caused by locking failure.

[0022] (2) The dynamic change of the locking mechanism can more truly restore the complex stress state of the automotive sprocket during actual operation due to factors such as engine speed change and load fluctuation, so as to obtain more comprehensive and accurate performance detection data, and improve the guiding value of the detection results for actual applications.

[0023] Reducing the risk of mechanical damage: The characteristic that the rubber gasket generates different frictional forces at different rotational speeds enables the locking mechanism to have good buffering and self-adaptive capabilities while providing sufficient binding force. Compared with the rigid locking components in the prior art, the rubber gasket provides an appropriate frictional force at low speed to avoid damage such as indentation and wear on the sprocket surface caused by excessive locking. At high speed, the contact area and frictional force are increased through extrusion deformation to enhance the locking effect in a flexible manner, prevent local stress concentration of the sprocket due to rigid extrusion, extend the service life of the sprocket, and ensure the reusability of the sprocket after detection.

[0024] (3)Compared with the single-axis direct drive method of the prior art, this device adopts a dual-axis synchronous drive. Through the cooperation of two parallel drive shafts and a central drive motor, power transmission is achieved using pulleys and drive belts, ensuring uniform force on the subsequent sprocket during rotation. The dual-axis synchronous drive enables the sprocket to rotate stably at different speeds, effectively reducing the data fluctuation of the friction torque caused by unstable drive and improving the detection accuracy. In addition, the two drive shafts work together and can respond quickly when the motor speed is adjusted, further ensuring the stability of the sprocket rotation during the detection process, providing a solid foundation for obtaining reliable detection data, and enabling the device to adapt to a wider range of speed test ranges.

[0025] Particularly important is that during the actual test process, this device introduces a magnetic attraction component for loading processing. Through the symmetric magnetic sheet group with different magnetic force intensities on its surface, it can dynamically adjust the loading resistance according to the change in the drive motor speed. In the high-speed test stage, rotate the magnetic attraction component to make the high-magnetic-force magnetic sheet correspond to the magnet shaft at the lower end of the drive shaft, thereby increasing the rotation resistance of the drive shaft and simulating the increasing load of the sprocket as the speed increases during actual operation. This loading method can achieve precise resistance adjustment at different speed stages. Compared with the traditional fixed loading method, it can more realistically restore the force-bearing situation of the VVT sprocket under complex working conditions and obtain more comprehensive friction torque data. By systematically testing the performance of the sprocket at different speeds and corresponding loading resistances, it helps to deeply evaluate the reliability and durability of the sprocket in various actual working scenarios and provides sufficient basis for product optimization and quality control.

[0026] At the same time, the linkage of the magnetic attraction component loading and the variable-speed locking mechanism realizes double guarantee and collaborative optimization for the sprocket detection. The magnetic attraction component adjusts the loading resistance according to the speed, simulating the load change in the actual working condition, while the variable-speed locking mechanism dynamically adjusts the locking force according to the speed to ensure that the sprocket can be firmly fixed under different loads. The linkage of the two, on the one hand, avoids the problems of the sprocket loosening due to excessive loading force or the detection accuracy being affected by over-tight locking; on the other hand, by synchronously adjusting the loading and locking states, the detection process is closer to the force-bearing and constraint states of the sprocket during actual operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is the front perspective structural schematic diagram of the present invention; Figure 2 is the perspective structural schematic diagram of the test tabletop of the present invention; Figure 3 is the perspective structural schematic diagram of the variable-speed locking mechanism of the present invention; Figure 4 is the perspective structural schematic diagram of the variable-speed locking mechanism of the present invention after use; Figure 5 is the exploded view of the variable-speed locking mechanism of the present invention; Figure 6 Schematic diagram of the upward-looking three-dimensional structure of the present invention; Figure 7 Schematic diagram of the three-dimensional structure of the variable-speed load mechanism of the present invention; Figure 8 Schematic diagram of the three-dimensional structure of the transmission member of the present invention; Figure 9 Schematic diagram of the three-dimensional structure of the magnetic attraction member of the present invention; Figure 10 For the present invention Figure 9 Partial enlarged three-dimensional structure schematic diagram at position A in the present invention.

[0028] The reference numerals in the figure are: 1. Testing machine; 11. Testing table; 12. Control module; 13. Driving module; 14. Sprocket main body; 2. Variable-speed locking mechanism; 21. Support frame; 22. Limiting disc; 23. Fitting bin; 24. Through groove; 25. Driving disc; 26. Nut ring; 27. Threaded shaft; 28. Trigger shaft; 3. Variable-speed load mechanism; 31. Transmission member; 32. Driving shaft; 33. Driving gear; 34. Linkage gear; 35. Magnet shaft; 36. Magnetic attraction member. Specific embodiments

[0029] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention; It should be noted that the structures and working principles of the above-mentioned testing machine 1, testing table 11, control module 12, driving module 13, and sprocket main body 14 and other devices belong to the prior art and will not be elaborated here.

[0030] Embodiment 1: Please refer to Figures 1 to 10 As shown, an automatic feeding type performance detection system based on a VVT sprocket is used to detect the performance of the sprocket main body 14, including a testing machine 1, a testing table 11 is installed inside the testing machine 1, a control module 12 is installed outside the testing machine 1, and a driving module 13 is installed outside the testing table 11.

[0031] It should be noted that the control module 12 includes a controller, a sensor, and a driver. The driver is used to convert the output weak electrical signal into a strong electrical signal capable of driving an actuator. The driving module 13 includes a driving motor and a driving cylinder, and the movement of the driving cylinder is controlled by the controller to move a distance.

[0032] Please refer to Figures 1 to 10 As shown, a variable speed locking mechanism 2 is provided above the test table 11. The variable speed locking mechanism 2 includes a support frame 21 installed on the side wall of the test table 11. The lower surface of the support frame 21 is fixedly connected with a limit disk 22. A fitting bin 23 is evenly installed inside the limit disk 22. The end part of the fitting bin 23 is composed of a horizontal shaft and a vertical shaft, and the vertical shaft is designed with a hollow structure, and its interior is filled with a rubber gasket. A through groove 24 is evenly opened on one side of the fitting bin 23 close to the sprocket body 14. A driving disk 25 is installed outside the fitting bin 23. The fitting bin 23 is initially in a dispersed state. The fitting bin 23 is used to fit on the outer side wall of the sprocket body 14 for locking. When the sprocket body 14 is subjected to a high-speed test, the control module 12 drives the vertical part inside the fitting bin 23, so that the internal rubber gasket is extruded from the position of the through groove 24, so as to increase the locking force to adapt to the high-speed test and form a load on the sprocket body 14.

[0033] It should be noted that the entire support frame 21 is slidably connected to the inner side wall of the test table 11. The support frame 21 is fixedly connected to the limit disk 22. Curved grooves are evenly penetrated on the surface of the driving disk 25. The fitting bin 23 is slidably connected to the driving disk 25 through the curved grooves. The limit disk 22 and the fitting bin 23 are slidably connected through the rotation drive of the driving disk 25. A nut ring 26 is fixedly connected inside the driving disk 25. A threaded shaft 27 is movably connected to the lower end of the output shaft of the driving cylinder in the driving module 13 corresponding to the position of the nut ring 26. A ball screw structure is formed between the nut ring 26 and the threaded shaft 27. A trigger shaft 28 is fixedly connected to the outer wall of the threaded shaft 27. When the fitting bin 23 moves to the outer wall of the sprocket body 14, the vertical shaft in the fitting bin 23 is located directly below the trigger shaft 28.

[0034] Specifically, when performing performance detection on the sprocket body 14, all components of the entire automatic feeding type performance detection system work together. First, the controller in the control module 12 converts the weak electrical signal into a strong electrical signal according to the preset detection program, and drives the driving motor and the driving cylinder in the driving module 13 to start running.

[0035] When the equipment is initially started, the driving cylinder starts working, and its output shaft drives the threaded shaft 27 to move downward. Since a ball screw structure is formed between the nut ring 26 and the threaded shaft 27, the threaded shaft 27 will drive the nut ring 26 to rotate during the downward movement. The nut ring 26 is fixed inside the driving disk 25, and then drives the driving disk 25 to rotate. The surface of the driving disk 25 is evenly penetrated with curved grooves, and the bonding bin 23 and the driving disk 25 are slidingly connected through the curved grooves. Therefore, the rotation of the driving disk 25 will cause the bonding bin 23, which is initially in a dispersed state, to slide inward along the inside of the limit disk 22 and finally fit into the outer wall of the sprocket body 14, completing the preliminary locking of the sprocket body 14, ensuring that the sprocket is in a stable state in the initial stage of the test. At this time, the vertical axis in the bonding bin 23 is located below the trigger shaft 28, but has not yet contacted it.

[0036] When high-speed testing of the sprocket body 14 is required, the controller in the control module 12 issues a command to drive the output shaft of the cylinder to move further downward by a certain distance. The threaded shaft 27 continues to move downward and will be staggered with the nut ring 26. Therefore, the threaded shaft 27 will no longer drive the nut ring 26 and the drive plate 25 to rotate during the downward movement. At the same time, the trigger shaft 28 fixed on the outer wall of the threaded shaft 27 also moves downward. The trigger shaft 28 gradually squeezes the interior of the vertical part of the fitting chamber 23. Because the vertical shaft of the fitting chamber 23 is hollow and filled with rubber gaskets, under the squeezing action of the trigger shaft 28, the rubber gasket is squeezed out from the through groove 24, increasing the friction between the fitting chamber 23 and the outer wall of the sprocket body 14, thereby significantly increasing the locking force to meet the needs of high-speed testing. In addition, this increase in friction also creates an additional loading effect on the sprocket body 14, simulating the greater load that the sprocket bears under actual high-speed operating conditions.

[0037] During the entire detection process, the control module 12 monitors the operating status of each component and the performance parameters of the sprocket body 14 in real time through sensors, and adjusts the speed of the driving motor and the movement of the driving cylinder in the driving module 13 in real time according to the detection requirements, ensuring that the speed lock mechanism 2 can accurately lock and load the sprocket body 14 according to different speeds, thereby realizing comprehensive and accurate performance detection of the sprocket body 14.

[0038] Please refer to Figures 1 to 10As shown in the figure, a variable-speed load mechanism 3 is provided below the test tabletop 11. The variable-speed load mechanism 3 includes a transmission member 31 installed outside the output shaft of the driving motor of the driving module 13, and driving shafts 32 are symmetrically installed on both sides of the output shaft of the driving motor. The transmission member 31 as a whole includes no less than three belt pulleys and transmission belts. The belt pulleys in the transmission member 31 are respectively fixedly connected to the outer walls of the output shaft of the driving motor and the driving shafts 32. The driving shafts 32 and the output shaft of the driving motor are synchronously connected through the transmission member 31. Driving gears 33 are fixedly connected to the upper surfaces of the driving shafts 32. Linkage gears 34 are engaged on the sides of the driving gears 33 close to each other. The linkage gears 34 are rotatably connected to the lower surface of the test tabletop 11. The sprocket main body 14 is installed above the linkage gears 34 through the test tabletop 11. Magnet shafts 35 are fixedly connected to the lower surfaces of the driving shafts 32. Magnetic absorption members 36 are rotatably connected to the lower surfaces of the magnet shafts 35. The magnetic absorption members 36 are rotatably connected to the outer wall of the output shaft of the driving motor in the driving module 13. The surface of the magnetic absorption member 36 is provided with no less than six magnetic pieces. Every two symmetrically distributed magnetic pieces are in a group, and the magnetic force intensity of each group of magnetic pieces gradually increases. The lower surfaces of the magnet shafts 35 are all magnetic force positive poles, and the upper surfaces of the magnetic pieces in the magnetic absorption member 36 are also uniformly magnetic force positive poles. When the rotational speed of the driving motor in the driving module 13 is increased for high-speed testing, by rotating the corresponding positions of the magnetic absorption member 36 and the magnet shaft 35, the magnetic pieces with higher magnetic force intensity are made to correspond to the positions of the magnet shafts 35 at the lower ends of the driving shafts 32, so as to increase the resistance of the synchronous rotation of the driving shafts 32 and load the sprocket main body 14.

[0039] Specifically, first, the driving motor in the driving module 13 starts, and its output shaft begins to rotate. The rotation of the output shaft of the driving motor is transmitted to the symmetrically installed driving shafts 32 on both sides through the transmission member 31. The transmission member 31 is composed of no less than three belt pulleys and transmission belts, and the belt pulleys are respectively fixedly connected to the outer walls of the output shaft of the driving motor and the driving shafts 32. In this way, the driving shafts 32 and the output shaft of the driving motor are synchronously connected through the transmission member 31, ensuring that the two driving shafts 32 can rotate synchronously.

[0040] During the synchronous rotation of the driving shafts 32, the driving gears 33 fixedly connected to their surfaces also rotate accordingly. The sides of the two driving gears 33 close to each other are engaged with the linkage gears 34. The linkage gears 34 are rotatably connected to the lower surface of the test tabletop 11. Due to the rotation of the driving gears 33, the linkage gears 34 are driven to rotate. And the sprocket main body 14 is installed above the linkage gears 34 through the test tabletop 11. Therefore, the rotation of the linkage gears 34 further drives the sprocket main body 14 to rotate, thus realizing the process of the driving shafts 32 driving the sprocket main body 14 to rotate.

[0041] The process of loading at different rotational speeds is as follows: When it is necessary to test the sprocket body 14 at different rotational speeds, the rotational speed of the drive motor will be adjusted accordingly. During this process, the drive shaft 32 always rotates synchronously with the output shaft of the drive motor. When increasing the rotational speed of the drive motor for high-speed testing, in addition to the increase in the rotational speed of the drive shaft 32, it is also necessary to load the sprocket body 14 to simulate the actual working conditions. At this time, the loading is achieved by rotating the magnetic attracting member 36. Specifically, since the magnetic attracting member 36 is rotatably connected to the outer wall of the output shaft of the drive motor, there are no less than six magnetic sheets mounted on its surface. Every two symmetrically distributed magnetic sheets form a group, and the magnetic force intensity of each group of magnetic sheets gradually increases. At the same time, the lower surface of the drive shaft 32 is fixedly connected with a magnet shaft 35, and the lower surfaces of the magnet shaft 35 and the magnetic sheets in the magnetic attracting member 36 are both magnetic force positive poles. When the magnetic attracting member 36 is rotated, the corresponding positions between it and the magnet shaft 35 change, so that the magnetic sheets with higher magnetic force intensity correspond to the position of the magnet shaft 35 at the lower end of the drive shaft 32. Due to the principle of like poles repelling each other, the repulsive force between the magnet shaft 35 and the magnetic attracting member 36 increases, thereby increasing the resistance to the synchronous rotation of the drive shaft 32. This resistance is transmitted to the sprocket body 14 through the drive shaft 32, the drive gear 33, and the linkage gear 34, realizing the loading of the sprocket body 14 and simulating the greater load borne by the sprocket during actual high-speed operation.

[0042] Throughout the process, the control module 12 monitors in real time information such as the rotational speed of the drive motor, the rotational state of the drive shaft 32, and the relevant performance parameters of the sprocket body 14 through sensors, and adjusts in real time the rotational speed of the drive motor and the rotational angle of the magnetic attracting member 36 according to the preset detection program and actual requirements, so as to ensure that the variable-speed loading mechanism 3 can accurately load the sprocket body 14 at different rotational speeds, thereby realizing a comprehensive and accurate performance detection of the sprocket body 14.

[0043] Embodiment 2: An automatic feeding type performance detection method based on a VVT sprocket, comprising the following steps: S1: Power on the device: Turn on the main power supply of the device and simultaneously turn on the power supply of the industrial control computer; S2: Preparation before work: Turn on the air source to supply air to the device, confirm the tooling, select the corresponding sprocket body 14 to be detected and the detection formula according to the product model, and ensure that the device is reset and the driving components in the driving module 13 return to zero; S3: Appearance inspection: Visually inspect the appearance of the product, and conduct 100% visual inspection according to the appearance inspection instruction manual or the defect comparison chart; S4: Feeding: Place the sprocket body 14 on the test table 11, and confirm that the sprocket body 14 is completely placed in the base of the test table 11; S5: Performance detection: After the emergency stop, grating, air source, automatic, and all products are correct, start the detection by pressing the detection button with both hands, and put the unqualified products into the unqualified material box; S6: Shutdown: Shut down the industrial control computer, turn off the total power supply of the equipment, turn off the gas source, and release the internal pressure of the equipment; S7: Turnover: Put the unqualified parts into the red box for unqualified products, and put the qualified products into the green plastic box. When stacking them, use a partition for each layer, and the height of the products shall not be higher than the height of the material box; S8: Maintenance: Clean the workbench surface, sort out the test pieces and the pieces to be tested, manage the unqualified products according to the unqualified product process, and avoid mixing materials.

[0044] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An automatic feeding type performance detection system based on a VVT sprocket is used for performing performance detection on a sprocket main body (14), and comprises a testing machine (1). A testing table surface (11) is installed inside the testing machine (1), a control module (12) is installed outside the testing machine (1), and a driving module (13) is installed outside the testing table surface (11). It is characterized in that: Above the described test tabletop (11), a variable-speed locking mechanism (2) is provided. The variable-speed locking mechanism (2) includes a support frame (21) installed on the side wall of the test tabletop (11). The lower surface of the support frame (21) is fixedly connected with a limit disk (22). Inside the limit disk (22), a fitting bin (23) is evenly installed. The end part of the fitting bin (23) is composed of a horizontal shaft and a vertical shaft in combination, and the vertical shaft is designed with a hollow structure, and its inside is filled with a rubber gasket. On one side of the fitting bin (23) close to the sprocket main body (14), through slots (24) are evenly opened. Outside the fitting bin (23), a driving disk (25) is installed. The fitting bins (23) are initially in a dispersed state. The fitting bins (23) are used to fit on the outer side wall of the sprocket main body (14) for locking. When the sprocket main body (14) is undergoing a high-speed test, the control module (12) drives the vertical part inside the fitting bin (23), so that the internal rubber gasket is extruded from the position of the through slot (24), so as to increase the locking force to adapt to the high-speed test and form a load on the sprocket main body (14).

2. The automatic feeding type performance detection system based on a VVT sprocket according to claim 1, wherein: The control module (12) includes a controller, a sensor, and a driver. The driver is used to convert the output weak electrical signal into a strong electrical signal capable of driving an actuator. The driving module (13) includes a driving motor and a driving cylinder. The movement of the driving cylinder is controlled by the controller for the moving distance.

3. An automatic feeding type performance detection system based on a VVT sprocket according to claim 1, characterized in that: The whole support frame (21) is slidably connected to the inner side wall of the test tabletop (11). The support frame (21) is fixedly connected with the limit disk (22). On the surface of the driving disk (25), bending slots are evenly penetrated. The fitting bin (23) is slidably connected with the driving disk (25) through the bending slots. Between the limit disk (22) and the fitting bin (23), it is slidably connected by the rotation drive of the driving disk (25).

4. An automatic feeding type performance detection system based on a VVT sprocket according to claim 1, characterized in that: Inside the driving disk (25), a nut ring (26) is fixedly connected. At the position corresponding to the nut ring (26) at the lower end of the output shaft of the driving cylinder in the driving module (13), a threaded shaft (27) is movably connected. Between the nut ring (26) and the threaded shaft (27), a ball screw structure is formed.

5. The automatic feeding type performance detection system based on a VVT sprocket according to claim 4, characterized in that: On the outer wall of the threaded shaft (27), a trigger shaft (28) is fixedly connected. When the fitting bin (23) moves to the outer wall of the sprocket main body (14), the vertical shaft in the fitting bin (23) is corresponding to the directly below of the trigger shaft (28).

6. The automatic feeding type performance detection system based on a VVT sprocket according to claim 1, wherein: Below the test tabletop (11), a variable-speed load mechanism (3) is provided. The variable-speed load mechanism (3) includes a transmission part (31) installed outside the output shaft of the driving motor of the driving module (13). And on both sides of the output shaft of the driving motor, driving shafts (32) are symmetrically installed. The whole transmission part (31) includes not less than three belt pulleys and transmission belts. The belt pulleys in the transmission part (31) are respectively fixedly connected to the outer walls of the output shaft of the driving motor and the driving shafts (32). The driving shafts (32) and the output shaft of the driving motor are synchronously transmission-connected through the transmission part (31).

7. An automatic feeding type performance detection system based on a VVT sprocket according to claim 6, characterized in that: The upper surfaces of the driving shafts (32) are fixedly connected with driving gears (33). The driving gears (33) are meshed with linkage gears (34) on the sides close to each other. The linkage gears (34) are rotatably connected to the lower surface of the test table (11). The sprocket body (14) is installed above the linkage gear (34) through the test table (11).

8. An automatic feeding type performance detection system based on a VVT sprocket according to claim 6, characterized in that: The lower surfaces of the driving shafts (32) are fixedly connected with magnet shafts (35). The lower surfaces of the magnet shafts (35) are rotatably connected with magnetic absorption members (36). The magnetic absorption members (36) are rotatably connected to the outer wall of the output shaft of the driving motor in the driving module (13).

9. The automatic feeding type performance detection system based on a VVT sprocket according to claim 8, characterized in that: The surface of the magnetic absorption member (36) is provided with no less than six magnetic sheets. Every two symmetrically distributed magnetic sheets form a group, and the magnetic force intensity of each group of magnetic sheets gradually increases. The lower surfaces of the magnet shafts (35) are all magnetic force positive poles, and the upper surfaces of the magnetic sheets in the magnetic absorption member (36) are also uniformly magnetic force positive poles. When the rotational speed of the driving motor in the driving module (13) is increased for high-speed testing, by rotating the corresponding positions of the magnetic absorption member (36) and the magnet shaft (35), the magnetic sheets with higher magnetic force intensity are made to correspond to the positions of the magnet shafts (35) at the lower ends of the driving shafts (32), so as to increase the resistance of the synchronous rotation of the driving shafts (32) and load the sprocket body (14).

10. An automatic feeding type performance detection method based on a VVT sprocket, which is applied to an automatic feeding type performance detection system based on a VVT sprocket according to any one of claims 1-9, and is characterized in that: It includes the following steps: S1: Equipment power-on: Turn on the total power supply of the equipment and simultaneously turn on the power supply of the industrial computer; S2: Preparation before work: Turn on the air source to supply air to the equipment, confirm the tooling, select the corresponding sprocket body (14) to be detected and the detection formula according to the product model, and ensure that the equipment is reset and the driving components in the driving module (13) return to zero; S3: Appearance inspection: Visually inspect the product appearance, and conduct 100% visual inspection according to the appearance inspection instruction manual or the defect comparison chart; S4: Feeding: Place the sprocket body (14) on the test table (11), and confirm that the sprocket body (14) is completely placed in the base of the test table (11); S5: Performance detection: After the emergency stop, grating, air source, and automatic functions are all correct and the product is all correct, start the detection by pressing the detection button with both hands, and put the unqualified products into the unqualified material box; S6: Shutdown: Turn off the industrial computer, turn off the total power supply of the equipment, turn off the air source, and release the internal pressure of the equipment; S7: Turnover: Put the unqualified parts into the red box for unqualified products, put the qualified products into the green plastic box, use partitions for each layer when stacking, and the height of the product shall not be higher than the height of the material box; S8: Maintenance: Clean the workbench surface, sort out the test pieces and the test pieces to be tested, manage the unqualified products according to the unqualified product process, and avoid material mixing.

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