A multi-sensor fusion system for measuring geometric parameters of a crankshaft

Abstract

The application relates to a multi-sensor fusion crankshaft geometric parameter measurement system, and relates to the field of crankshaft measurement, in particular to a multi-sensor fusion crankshaft geometric parameter measurement system and a measurement method thereof. The system comprises a multi-sensor fusion crankshaft geometric parameter measurement system, a rotating device for driving the rotation of a crankshaft is connected to a workbench, a detection device is arranged above the workbench, the rotating device is provided with a mounting frame, a clamping frame, clamping rollers and a rotary drive, and the workbench is connected with horizontal and vertical adjusting mechanisms. The system further comprises a measurement method based on the system, different shaft necks are clamped, and rotation and adjustment are cooperated to realize the detection of different parts of the crankshaft. The application can more accurately and comprehensively measure the geometric parameters of the crankshaft, and effectively improves the measurement efficiency and accuracy.

Description

Technical Field

[0001] This application relates to the field of crankshaft parameter measurement device technology, and in particular to a crankshaft geometric parameter measurement system with multi-sensor fusion. Background Technology

[0002] The crankshaft is the most important component in an engine. It bears the force transmitted from the connecting rod and converts it into torque, which is then output through the crankshaft to drive other accessories on the engine. In other words, it converts the reciprocating linear motion of the piston into rotational motion and transmits this rotational motion to other working machinery to output the engine's power. Due to its complex shape, the crankshaft usually requires measuring devices in conjunction with a rotating mechanism to measure various parameters of the crankshaft at different angles.

[0003] A Chinese patent with authorization announcement number CN211696241U discloses a crankshaft multi-parameter integrated measuring instrument, which includes an electrical control box containing an automatic controller. The top surface of the box is a worktable with a crankshaft mounting base, a rotating device controlled by the automatic controller to drive the crankshaft, and a detection device for detecting the crankshaft. The measuring component of the detection device is a sensor, which improves measurement accuracy. During the detection process, the rotating device mainly drives the crankshaft to rotate, thereby achieving circumferential measurement of the crankshaft.

[0004] The aforementioned technologies have the following drawbacks: the crankshaft structure is not a single concentric shaft structure; it has a main journal located on the center line and a connecting rod journal offset from the center line. Its rotating device can only clamp the outermost main journal to make the connecting rod journal rotate around the center line. This measurement state will cause the main journal located in the middle to be in a state of rotation around its own axis, i.e., a state of self-rotation, which is relatively stable and the test results are relatively accurate. However, the connecting rod journal will be in a state of rotation around an axis offset from its own axis, i.e., a state of revolution, which is less stable and can easily lead to a decrease in the accuracy of the test results. Therefore, it needs to be improved. Summary of the Invention

[0005] To improve the stability of the main journal and connecting rod journal during the rotational state of each component during testing, this application provides a multi-sensor fusion crankshaft geometric parameter measurement system.

[0006] A multi-sensor fusion crankshaft geometric parameter measurement system includes a worktable connected to a rotating device for driving the crankshaft to rotate. A detection device for detecting the crankshaft is positioned above the worktable. The rotating device includes a mounting frame with several clamping frames connected to its inner side. Clamping rollers are provided at the ends of the clamping frames, and a rotation drive for driving the clamping rollers to rotate is connected to the clamping frames. A lateral adjustment mechanism is connected to the worktable, and a vertical adjustment mechanism is connected to the drive end of the lateral adjustment mechanism. The drive end of the vertical adjustment mechanism is connected to the mounting frame.

[0007] By adopting the above technical solution, in this embodiment, three clamping frames are set and evenly distributed along the circumference of the mounting frame. The three clamping rollers can clamp the main journal or the connecting rod journal. When the three clamping rollers clamp the end main journal, the rotary drive can drive the end main journal to rotate, thereby realizing the rotation of the main journal and the revolution of the connecting rod journal relative to the main journal. In this state, it is easier to inspect other main journals. In addition, the above-mentioned state can be combined with a horizontal adjustment mechanism and a vertical adjustment mechanism for angle control. By controlling the horizontal adjustment mechanism and the vertical adjustment mechanism to work synchronously, the main journal can be manipulated to perform circular motion. By controlling the rotation drive, the connecting rod journal is in a state of revolution relative to the main journal, but in a state of rotation relative to the worktable in the state of circular motion of the main journal. Therefore, the connecting rod journal is more stable relative to the detection device in this state, resulting in better detection effect.

[0008] Therefore, in actual testing, a two-stage testing method can be used, for example: First, the main journal is clamped by three clamping rollers, and then adjusted by an adjustment mechanism and a vertical adjustment mechanism to make the main journal move in a circular motion relative to the worktable, and the connecting rod journal rotate relative to the worktable. In this state, all connecting rod journals can be tested more stably. The connecting rod journal is then held by three clamping rollers, and with the addition of an adjustment mechanism and a vertical adjustment mechanism, the connecting rod journal is in a circular motion state relative to the worktable, and the main journal is in a rotation state relative to the worktable. In this state, all the main journals can be tested more stably. By performing tests in stages at different clamping locations, stable testing of the main journal and connecting rod journal can be achieved separately. Since the testing locations and clamping locations are of different types, the testing is unaffected by the clamping location. For example, in related technologies, the conventional clamping method involves clamping and rotating the outermost main journal for testing. However, this method results in the clamping location being in a state of long-term obstruction, making effective testing impossible. This application solves this defect and improves the stability of each testing process.

[0009] Preferably, the lateral adjustment mechanism includes a slide rail, a slider, a lead screw, and a lateral adjustment drive. The slide rail is connected to the worktable, the slider is slidably connected to the slide rail, the lead screw is rotatably connected to the slide rail and threadedly connected to the slider, the lateral adjustment drive is connected to the slide rail and is used to drive the lead screw to rotate, and the vertical adjustment mechanism is connected to the lateral adjustment mechanism through the slider.

[0010] By adopting the above technical solution, the mounting frame of the rotating device can be adjusted in position under the drive of the horizontal adjustment mechanism and the vertical adjustment mechanism. The horizontal adjustment mechanism adopts a structure of slide rail, slider, lead screw and horizontal adjustment drive, which can accurately control the sliding of the slider on the slide rail, thereby driving the vertical adjustment mechanism and the mounting frame to move horizontally. In conjunction with the vertical adjustment mechanism, it can achieve, for example, the manipulation of the main journal to perform circular motion, so that the connecting rod journal rotates relative to the detection device, which is more stable. Thus, on the one hand, it can realize the separate and stable detection of the main journal and the connecting rod journal, and on the other hand, it solves the problem that the clamping part is blocked and cannot be effectively detected, thus improving the detection effect.

[0011] Preferably, the rotary drive includes a drive chain, a drive sprocket, driven sprockets, and a drive component. The drive sprocket is rotatably connected to the mounting frame. The number of driven sprockets corresponds to the number of clamping rollers, and the driven sprockets are rotatably connected to the corresponding clamping frames. The drive chain is wound around the outside of the drive sprocket and several driven sprockets. The drive component is connected to the mounting frame and is used to drive the drive sprocket to rotate. A transmission mechanism is connected between the driven sprockets and the corresponding clamping rollers.

[0012] By adopting the above technical solution, the driving component drives the active sprocket to rotate, and the driving chain drives the driven sprocket to rotate, which in turn drives the corresponding clamping roller to rotate through the transmission mechanism. This achieves the driving of the clamping roller to rotate, providing power for the rotation of the crankshaft. It helps to realize the self-rotation of the main journal or connecting rod journal. In conjunction with the lateral adjustment mechanism and the vertical adjustment mechanism, it can realize the stable detection of different journals.

[0013] Preferably, the clamping frame includes a fixed base, a movable frame, and a telescopic component. The fixed base is fixedly connected to the mounting frame, the telescopic component is connected between the fixed base and the movable frame, and the driven sprocket is rotatably connected to the movable frame. The mounting frame is slidably equipped with a carriage, the carriage is rotatably equipped with a tension sprocket, the tension sprocket abuts against the outside of the drive chain, and a tensioning elastic element is provided between the mounting frame and the carriage.

[0014] By adopting the above technical solution, the fixed seat and the movable frame are connected by a telescopic component, allowing the position of the movable frame to be adjusted to accommodate crankshafts of different sizes. The driven sprocket is rotatably connected to the movable frame, ensuring that the rotary drive can drive the clamping roller to rotate. The slide on the mounting frame is slidable, and the tension sprocket on the slide abuts against the outside of the drive chain. A tensioning elastic element is provided between the mounting frame and the slide to keep the drive chain taut, ensuring stable transmission of the rotary drive. This improves the stability of the rotary device, helps to drive the crankshaft to rotate more stably, and improves the stability and accuracy of crankshaft geometric parameter measurement.

[0015] Preferably, the number of clamping rollers is three, and they are evenly distributed along the circumference of the mounting frame.

[0016] By adopting the above technical solution, three clamping rollers evenly distributed along the circumference of the mounting frame can clamp the main journal or connecting rod journal. When clamping the end of the main journal, the rotation drive can drive the end of the main journal to rotate, realizing the rotation of the main journal and the revolution of the connecting rod journal relative to the main journal, which facilitates the inspection of other main journals. With the combination of the lateral adjustment mechanism and the vertical adjustment mechanism to control the circumferential movement of the main journal, the connecting rod journal can rotate relative to the worktable, making the connecting rod journal more stable relative to the inspection device and improving the inspection effect. The three clamping rollers respectively abut against the three equal division points of the crankshaft circumference, which can achieve more stable support during the crankshaft rotation process.

[0017] Preferably, the mounting frame is provided with a mounting plate and the mounting plate is connected to the mounting frame by a tension drive. The tension drive is used to adjust the distance between the mounting plate and the mounting frame, and the slide is slidably connected to the mounting plate.

[0018] By adopting the above technical solution, the distance between the tension drive adjustment mounting plate and the mounting frame is adjusted, and the slide is slidably connected to the mounting plate. This allows for better adjustment of the position of the tension sprocket, ensuring the tension of the drive chain, ensuring stable operation of the rotary drive device, maintaining the stability of the crankshaft rotation, and improving the accuracy of the test results.

[0019] Preferably, the clamping roller is provided with an anti-slip groove along the circumference, an anti-slip ring is provided inside the anti-slip groove, the outer edge of the anti-slip ring protrudes from the opening of the anti-slip groove, an anti-slip ruler ring is provided on the inner edge of the anti-slip ring, and an anti-slip tooth groove is provided at the bottom of the anti-slip groove, with the anti-slip ruler ring meshing with the anti-slip tooth groove.

[0020] By adopting the above technical solution, anti-slip grooves and anti-slip rings are set, and the outer edge of the anti-slip ring protrudes from the opening of the anti-slip groove, which can increase the friction between the clamping roller and the crankshaft and improve the clamping stability of the crankshaft. The anti-slip ring on the inner edge of the anti-slip ring meshes with the anti-slip tooth groove at the bottom of the anti-slip groove, which can prevent the anti-slip ring from sliding in the anti-slip groove. This further ensures that the rotation of the main journal or connecting rod journal can be realized more stably during the rotation of the crankshaft, which is conducive to improving the accuracy of the dynamic change of the rotation angle.

[0021] Preferably, the anti-slip ring has an air channel inside, and the clamping frame is provided with a compression mechanism for squeezing the anti-slip ring to push air toward the air channel near the crankshaft.

[0022] By adopting the above technical solution, the extrusion mechanism extrudes the anti-slip ring, pushing the air towards the air passage near the crankshaft, which can further enhance the clamping effect of the anti-slip ring on the crankshaft, improve the stability of the main journal and connecting rod journal in their respective rotational states during the test, and facilitate the separate stable testing of the main journal and connecting rod journal.

[0023] Preferably, the extrusion mechanism includes an extrusion block and a trigger rod slidably connected to the clamping frame. An extrusion wheel is rotatably connected to the side of the extrusion block near the crankshaft. A trigger wheel is rotatably connected to the end of the trigger rod near the crankshaft. A trigger gear is rotatably provided on the clamping frame. Both the extrusion wheel and the trigger rod are provided with trigger racks. The two trigger racks respectively mesh with the two sides of the trigger gear.

[0024] By adopting the above technical solution, an air channel is set inside the anti-slip ring, and it is squeezed by a squeezing mechanism. The specific triggering process is as follows: when the clamping roller approaches the crankshaft, the trigger wheel first abuts against the crankshaft, thereby squeezing the trigger wheel and trigger rod outward. Under the action of the trigger rack and trigger gear, the squeezing block, squeezing rod, and squeezing wheel move in opposite directions and slide inward, thus squeezing the anti-slip ring. Therefore, while the clamping roller is continuously clamping the crankshaft, the squeezing wheel will stably press against the anti-slip ring, maintaining the static friction at the contact point between the anti-slip ring and the crankshaft. When the clamping roller no longer needs to clamp, it moves away from the crankshaft, and the trigger wheel no longer presses against the crankshaft, thus canceling the triggering mechanism, and the squeezing wheel no longer presses against the anti-slip ring. Overall, the squeezing mechanism can be automatically opened and closed.

[0025] A measurement method for a crankshaft geometric parameter measurement system based on multi-sensor fusion first uses several clamping rollers to clamp the main journal, and uses a rotation drive to realize the rotation of the main journal. At the same time, an adjustment mechanism and a vertical adjustment mechanism are used to realize that the main journal is in a circular motion state relative to the worktable, and the connecting rod journal on one side is in a rotation state relative to the worktable. In this state, the connecting rod journal on one side is detected. Then, several clamping rollers are used to clamp the connecting rod journal, and the connecting rod journal is rotated by a rotary drive. At the same time, with the adjustment mechanism and the vertical adjustment mechanism, the connecting rod journal is in a circular motion state relative to the worktable, and the main journal is in a rotation state relative to the worktable. In this state, all the main journals are inspected.

[0026] By adopting the above technical solution, and through multiple tests with different clamping locations, stable separate testing of the main journal and connecting rod journal can be achieved. Since the testing locations and clamping locations are of different types, the testing is not affected by the clamping location. Furthermore, conventional clamping methods in related technologies involve clamping and rotating the outermost main journal for testing. However, this method results in the clamping location being in a state of long-term obstruction, making effective testing impossible. This application solves this defect and improves the stability of each testing process.

[0027] In summary, this application includes at least one of the following beneficial technical effects: 1. Multiple clamping rollers can be used to select and clamp the main journal or connecting rod journal as needed. The rotation drive is used to realize the rotation of the main journal or connecting rod journal, which facilitates the inspection of different journals under a more stable state. 2. Furthermore, a rotary drive combined with a horizontal adjustment mechanism and a vertical adjustment mechanism can be used to make the main journal or connecting rod journal move in a circular motion relative to the worktable. Consequently, the connecting rod journal or main journal is more stable relative to the detection device, thus improving the detection effect. 3. By performing tests in stages with different clamping positions, stable testing of the main journal and connecting rod journal can be achieved separately, and the testing position is not affected by the clamping position, thus solving the problem that the clamping position is obstructed and cannot be effectively tested in the prior art. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of an embodiment of this application; Figure 2 This is a schematic diagram illustrating the connection between the rotating device and the crankshaft in an embodiment of this application; Figure 3 This is a structural schematic diagram illustrating the connection relationship between the various components of the rotating device in the embodiments of this application; Figure 4 This is a schematic diagram illustrating the connection between the clamping roller and the crankshaft in an embodiment of this application; Figure 5 This is a schematic diagram illustrating the connection between the anti-slip ring and the clamping roller in an embodiment of this application; Figure 6 This is a schematic diagram illustrating the connection between the trigger rod and the compression block in an embodiment of this application; Figure 7This is a schematic diagram illustrating the connection between the anti-slip ring and the crankshaft in an embodiment of this application; Figure 8 This is a schematic diagram used in the embodiments of this application to illustrate the state of the main journal revolving and the connecting rod journal rotating. Figure 1 ; Figure 9 This is a schematic diagram used in the embodiments of this application to illustrate the state of the main journal revolving and the connecting rod journal rotating. Figure 2 ; Figure 10 This is a schematic diagram illustrating the state of the connecting rod journal revolving around the sun and the main journal rotating on its own axis in an embodiment of this application.

[0029] In the picture: 1. Workbench; 11. Detection device; 12. Vertical adjustment mechanism; 2. Rotating device; 21. Mounting frame; 22. Clamping frame; 221. Fixed base; 222. Movable frame; 223. Telescopic component; 23. Clamping roller; 231. Anti-slip groove; 232. Anti-slip ring; 233. Anti-slip ruler ring; 234. Anti-slip toothed groove; 235. Air passage; 24. Rotary drive; 241. Drive chain; 242. Drive sprocket; 243. Driven sprocket; 244. Drive component; 251. Mounting plate; 252. Tensioning drive; 253. Carriage; 254. Tensioning sprocket; 255. Tensioning elastic element; 3. Lateral adjustment mechanism; 31. Slide rail; 32. Slider; 33. Lead screw; 34. Lateral adjustment drive; 4. Extrusion mechanism; 41. Extrusion block; 42. Trigger rod; 43. Extrusion wheel; 44. Trigger wheel; 45. Trigger gear; 46. Trigger rack; 47. Limiting protrusion; 51. Main journal; 52. Connecting rod journal. Detailed Implementation

[0030] The technical solutions in the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. The described embodiments are only possible technical implementations of the present invention, but are not limited thereto. Other embodiments obtained by those skilled in the art in conjunction with the embodiments of the present invention without creative effort are also within the protection scope of the present invention.

[0031] This application primarily employs multi-sensor fusion and multi-mechanism adjustment methods to measure crankshaft parameters, achieving the effect of improving the rotational stability of the main journal and connecting rod journal, and enhancing detection accuracy. A further detailed description of this application follows. Furthermore, since the specific detection methods and the specific sensors used (such as laser displacement sensors, vision sensors, contact probes, etc.) are not the main inventive concepts of this application and can all be obtained and combined using known technologies, they will not be elaborated upon in this embodiment.

[0032] Example Reference Figure 1 and Figure 2 The multi-sensor fusion crankshaft geometric parameter measurement system provided in this application includes a worktable 1, a rotating device 2, a detection device 11, a lateral adjustment mechanism 3, and a vertical adjustment mechanism 12. The rotating device 2 is used to drive the crankshaft to rotate, and the detection device 11 is set above the worktable 1 to detect the crankshaft. The drive end of the lateral adjustment mechanism 3 is connected to the vertical adjustment mechanism 12, and the drive end of the vertical adjustment mechanism 12 is connected to the mounting frame 21 of the rotating device 2. Through the cooperation of the lateral adjustment mechanism 3 and the vertical adjustment mechanism 12, the position and angle of the rotating device 2 in different directions can be adjusted, thereby improving the stability of the main journal 51 and the connecting rod journal 52 in their respective rotation states during the test.

[0033] Specifically, the rotating device 2 includes a mounting frame 21, a clamping frame 22, clamping rollers 23, and a rotating drive 24. The mounting frame 21 serves as the basic frame of the rotating device 2, providing mounting support for other components. The clamping frames 22 are located inside the mounting frame 21, and their number can be adjusted according to actual needs. In this embodiment, three are provided, evenly distributed around the circumference of the mounting frame 21. Each clamping frame 22 has a clamping roller 23 at its end. The clamping rollers 23 can be made of high-strength, wear-resistant metal materials, such as stainless steel or alloy steel, to ensure they are not easily damaged during long-term use. To increase the friction between the clamping rollers 23 and the crankshaft, special treatments such as knurling or sandblasting can be applied to the surface of the clamping rollers 23. The clamping frame 22 is connected to the rotating drive 24, which drives the clamping rollers 23 to rotate.

[0034] When the three clamping rollers 23 clamp the end main journal 51, the rotary drive 24 drives the end main journal 51 to rotate, realizing the rotation of the main journal 51. At this time, the connecting rod journal 52 revolves relative to the main journal 51, which makes it easier to inspect other main journals 51. In addition, the horizontal adjustment mechanism 3 and the vertical adjustment mechanism 12 can be used for angle control. By controlling the horizontal adjustment mechanism 3 and the vertical adjustment mechanism 12 to work synchronously, the main journal 51 is manipulated to perform circular motion, so that the connecting rod journal 52 is in a state of rotation relative to the worktable 1, thereby improving the stability of the connecting rod journal 52 during inspection.

[0035] Specifically, the lateral adjustment mechanism 3 includes a slide rail 31, a slider 32, a lead screw 33, and a lateral adjustment drive 34. The slide rail 31 is connected to the worktable 1, providing a sliding track for the slider 32. The slider 32 is slidably connected to the slide rail 31 and can slide freely on the slide rail 31. The lead screw 33 is rotatably connected to the slide rail 31 and threadedly connected to the slider 32. When the lateral adjustment drive 34 drives the lead screw 33 to rotate, the rotation of the lead screw 33 is converted into linear motion of the slider 32, thereby achieving the purpose of lateral adjustment. The lateral adjustment drive 34 can be driven by a motor, cylinder, or other methods. In this embodiment, a motor drive is used. The motor is connected to the lead screw 33 through a coupling, driving the lead screw 33 to rotate. The vertical adjustment mechanism 12 is connected to the lateral adjustment mechanism 3 through the slider 32. Its structure is similar to that of the lateral adjustment mechanism 3, also including a slide rail 31, a slider 32, a lead screw 33, and a vertical adjustment drive. The vertical adjustment drive drives the lead screw 33 to rotate, thereby achieving vertical position adjustment of the mounting frame 21.

[0036] The combined use of the lateral adjustment mechanism 3 and the vertical adjustment mechanism 12 enables the rotating device 2 to be adjusted to any position and angle within a plane, providing more possibilities for crankshaft inspection. By precisely controlling the movement of the lateral adjustment mechanism 3 and the vertical adjustment mechanism 12, the crankshaft can be positioned at the optimal inspection position and angle, thereby improving the accuracy and reliability of the inspection.

[0037] Reference Figure 3 Specifically, the rotary drive 24 also includes a drive chain 241, a drive sprocket 242, driven sprockets 243, and a drive element 244. The drive sprocket 242 is rotatably connected to the mounting frame 21 and is driven to rotate by the drive element 244. The number of driven sprockets 243 corresponds to the number of clamping rollers 23, and the driven sprockets 243 are rotatably connected to the corresponding clamping frames 22. The drive chain 241 is wound around the outside of the drive sprocket 242 and several driven sprockets 243. When the drive sprocket 242 rotates, it drives the driven sprockets 243 to rotate through the drive chain 241, which in turn drives the clamping rollers 23 to rotate through the transmission mechanism. The transmission mechanism can use a synchronous chain and synchronous sprockets to achieve power transmission. The drive element 244 can be a motor, and the output shaft of the motor is connected to the drive sprocket 242 to provide power to the drive sprocket 242. This chain drive method has the advantages of high transmission efficiency, compact structure, and high reliability, and can ensure the stable operation of the rotary drive 24. Furthermore, the chain drive system allows for speed adjustment as needed to adapt to different testing requirements.

[0038] Specifically, the clamping frame 22 includes a fixed base 221, a movable frame 222, and a telescopic component 223. The fixed base 221 is fixedly connected to the mounting frame 21, providing support for the movable frame 222. The telescopic component 223 connects the fixed base 221 and the movable frame 222, and can be a hydraulic telescopic rod, an electric telescopic rod, etc. Through the telescopic movement of the telescopic component 223, the position of the movable frame 222 relative to the fixed base 221 can be adjusted, thereby adjusting the position of the clamping roller 23 to accommodate crankshafts of different sizes and shapes. The driven sprocket 243 is rotatably connected to the movable frame 222, which ensures that the transmission relationship between the driven sprocket 243 and the clamping roller 23 is not affected by the position adjustment of the movable frame 222.

[0039] Mounting frame 21 is provided with mounting plate 251, and mounting plate 251 is connected to mounting frame 21 via tension drive 252. Tension drive 252 is used to adjust the distance between mounting plate 251 and mounting frame 21. Mounting plate 251 is slidably provided with slide 253, and slide 253 is rotatably provided with tension sprocket 254, which abuts against the outside of drive chain 241. Tensioning elastic element 255, such as spring, is provided between mounting plate 251 and slide 253. The function of tensioning elastic element 255 is to ensure that tension sprocket 254 always applies a certain tension to drive chain 241, ensuring that drive chain 241 does not slacken during transmission, thereby improving the stability and reliability of transmission.

[0040] Reference Figures 4 to 7 Specifically, the clamping roller 23 is provided with an anti-slip groove 231 along its circumference, and an anti-slip ring 232 is provided inside the anti-slip groove 231. The outer edge of the anti-slip ring 232 protrudes from the opening of the anti-slip groove 231 and contacts the crankshaft surface to increase friction. An anti-slip ring 233 is provided on the inner edge of the anti-slip ring 232, and an anti-slip toothed groove 234 is provided at the bottom of the anti-slip groove 231. The anti-slip ring 233 meshes with the anti-slip toothed groove 234 to prevent the anti-slip ring 232 from sliding within the anti-slip groove 231, ensuring the stability of the anti-slip effect. The anti-slip ring 232 can be made of materials with good elasticity and friction, such as rubber or silicone.

[0041] The anti-slip ring 232 has an internal air channel 235. The clamping frame 22 is equipped with a compression mechanism 4 for squeezing the anti-slip ring 232 to push air toward the air channel 235 near the crankshaft. The function of the compression mechanism 4 is to squeeze the air in the air channel 235 by squeezing the anti-slip ring 232 when the clamping roller 23 clamps the crankshaft, thereby creating a certain pressure, further increasing the friction between the anti-slip ring 232 and the crankshaft, and improving the stability of the clamping.

[0042] Specifically, the extrusion mechanism 4 includes an extrusion block 41 and a trigger rod 42 slidably connected to the clamping frame 22. An extrusion wheel 43 is rotatably connected to the side of the extrusion block 41 closest to the crankshaft, and a trigger wheel 44 is rotatably connected to the end of the trigger rod 42 closest to the crankshaft. A trigger gear 45 is rotatably mounted on the clamping frame 22. Both the extrusion wheel 43 and the trigger rod 42 are equipped with trigger racks 46, which mesh with the two sides of the trigger gear 45 respectively. When the clamping roller 23 approaches the crankshaft, the trigger wheel 44 first contacts the crankshaft. Under the action of the crankshaft, the trigger rod 42 moves away from the crankshaft, driving the extrusion wheel 43 to move closer to the crankshaft via the trigger gear 45, thus extruding the anti-slip ring 232 and squeezing out air. This mechanical linkage method is simple and reliable, and can respond promptly to clamping actions, realizing the extrusion function of the anti-slip ring 232. In this embodiment, a limiting protrusion 47 is also provided at the end of the trigger rack 46 to prevent slippage between the trigger gear 45 and the trigger rack 46.

[0043] The implementation principle of this embodiment is as follows: This multi-sensor fusion crankshaft geometric parameter measurement system achieves precise control of the crankshaft main journal 51 and connecting rod journal 52 under different rotational states through a unique combination of a rotating device 2, a lateral adjustment mechanism 3, and a vertical adjustment mechanism 12. Multiple clamping rollers 23 of the rotating device 2 can flexibly clamp the main journal 51 or connecting rod journal 52, cooperating with the rotation drive 24 to achieve different rotational modes. The coordinated operation of the lateral adjustment mechanism 3 and the vertical adjustment mechanism 12 enables precise adjustment of the crankshaft position and angle, ensuring that the main journal 51 and connecting rod journal 52 maintain a stable rotational state during the detection process, thereby improving the accuracy of the detection results. Simultaneously, the anti-slip ring 232 and the pressing mechanism 4 further enhance the stability of the clamping, ensuring the reliability and stability of the measurement system. This solves the problem of inaccurate detection results caused by the poor rotational stability of the connecting rod journal 52 in existing technologies, making a significant contribution to the technological development of crankshaft parameter measurement.

[0044] This application also provides a measurement method for a crankshaft geometric parameter measurement system based on multi-sensor fusion, including the following steps: S1, refer to Figure 8 and Figure 9First, several clamping rollers 23 clamp the main journal 51. A rotary drive 24 rotates the main journal 51. Simultaneously, an adjustment mechanism and a vertical adjustment mechanism 12 are used to ensure the main journal 51 is in a circular motion relative to the worktable 1, and the connecting rod journal 52 on one side is rotating relative to the worktable 1. In this state, the connecting rod journal 52 on one side can be inspected. In this process, the crankshaft is first placed above the worktable 1, allowing the clamping rollers 23 to accurately clamp the end of the main journal 51. Then, the rotary drive 24 is activated, causing the main journal 51 to rotate. Next, according to the inspection requirements, the horizontal adjustment mechanism 3 and the vertical adjustment mechanism 12 are controlled to work synchronously, causing the main journal 51 to perform circular motion, thus causing the connecting rod journal 52 on one side to rotate relative to the worktable 1. At this time, the inspection device 11 inspects the connecting rod journal 52 on one side and records the relevant geometric parameters.

[0045] S2, refer to Figure 10 The connecting rod journal 52 is then held by several clamping rollers 23. A rotary drive 24 drives the connecting rod journal 52 to rotate. Simultaneously, an adjustment mechanism and a vertical adjustment mechanism 12 are used to ensure the connecting rod journal 52 is in a circular motion relative to the worktable 1, while the main journal 51 rotates relative to the worktable 1. In this state, all main journals 51 can be inspected. After inspecting the connecting rod journal 52 in step S1, the position of the rotating device 2 is adjusted using the horizontal adjustment mechanism 3 and the vertical adjustment mechanism 12, so that the clamping rollers 23 hold the connecting rod journal 52. The rotary drive 24 is activated, causing the connecting rod journal 52 to rotate. The horizontal adjustment mechanism 3 and the vertical adjustment mechanism 12 are controlled to make the connecting rod journal 52 perform circular motion, while the main journal 51 rotates relative to the worktable 1. The detection device 11 is used to inspect all main journals 51 and record the corresponding geometric parameters.

[0046] The implementation principle of this embodiment is as follows: This measurement method achieves stable separate testing of the main journal 51 and the connecting rod journal 52 by performing multiple tests with different clamping positions. During each test, by rationally controlling the rotary drive 24, the lateral adjustment mechanism 3, and the vertical adjustment mechanism 12, the main journal 51 and the connecting rod journal 52 of the crankshaft are kept in a stable rotational state (rotating relative to the worktable 1), avoiding the detection errors caused by the unstable rotation of the connecting rod journal 52 (which is in a circular motion relative to the worktable 1) in traditional measurement methods. Simultaneously, the different types of testing and clamping positions during a single test avoid the influence of the clamping position on the test results, improving the accuracy and reliability of the test results and providing strong support for crankshaft quality control and performance evaluation.

[0047] The above are all 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 multi-sensor fusion crankshaft geometric parameter measurement system, comprising a worktable (1), wherein the worktable (1) is connected to a rotating device (2) for driving the crankshaft to rotate, and a detection device (11) for detecting the crankshaft is disposed above the worktable (1), characterized in that: The rotating device (2) includes a mounting frame (21), and a plurality of clamping frames (22) are connected to the inner side of the mounting frame (21). The clamping frame (22) is provided with a clamping roller (23) at its end. The clamping frame (22) is connected to a rotation drive (24) for driving the clamping roller (23) to rotate. The worktable (1) is connected to a horizontal adjustment mechanism (3). The driving end of the horizontal adjustment mechanism (3) is connected to a vertical adjustment mechanism (12). The driving end of the vertical adjustment mechanism (12) is connected to the mounting frame (21).

2. The crankshaft geometric parameter measurement system based on multi-sensor fusion according to claim 1, characterized in that: The horizontal adjustment mechanism (3) includes a slide rail (31), a slider (32), a lead screw (33), and a horizontal adjustment drive (34). The slide rail (31) is connected to the worktable (1). The slider (32) is slidably connected to the slide rail (31). The lead screw (33) is rotatably connected to the slide rail (31) and threadedly connected to the slider (32). The horizontal adjustment drive (34) is connected to the slide rail (31) and is used to drive the lead screw (33) to rotate. The vertical adjustment mechanism (12) is connected to the horizontal adjustment mechanism (3) through the slider (32).

3. The crankshaft geometric parameter measurement system based on multi-sensor fusion according to claim 1, characterized in that: The rotary drive (24) includes a drive chain (241), a drive sprocket (242), a driven sprocket (243), and a drive component (244). The drive sprocket (242) is rotatably connected to the mounting frame (21). The number of driven sprockets (243) corresponds to the number of clamping rollers (23), and the driven sprockets (243) are rotatably connected to the corresponding clamping frame (22). The drive chain (241) is wound around the outside of the drive sprocket (242) and several driven sprockets (243). The drive component (244) is connected to the mounting frame (21) and is used to drive the drive sprocket (242) to rotate. A transmission mechanism is connected between the driven sprocket (243) and the corresponding clamping roller (23).

4. The crankshaft geometric parameter measurement system based on multi-sensor fusion according to claim 3, characterized in that: The clamping frame (22) includes a fixed base (221), a movable frame (222), and a telescopic component (223). The fixed base (221) is fixedly connected to the mounting frame (21), the telescopic component (223) is connected between the fixed base (221) and the movable frame (222), and the driven sprocket (243) is rotatably connected to the movable frame (222). The mounting frame (21) is slidably provided with a slide (253), the slide (253) is rotatably provided with a tension sprocket (254), the tension sprocket (254) abuts against the outside of the drive chain (241), and a tensioning elastic element (255) is provided between the mounting frame (21) and the slide (253).

5. The crankshaft geometric parameter measurement system based on multi-sensor fusion according to claim 4, characterized in that: The number of clamping rollers (23) is three, and they are evenly distributed along the circumference of the mounting frame (21).

6. The crankshaft geometric parameter measurement system based on multi-sensor fusion according to claim 4, characterized in that: The mounting frame (21) is provided with a mounting plate (251) and the mounting plate (251) is connected to the mounting frame (21) by a tension drive (252). The tension drive (252) is used to adjust the distance between the mounting plate (251) and the mounting frame (21). The slide (253) is slidably connected to the mounting plate (251).

7. The crankshaft geometric parameter measurement system based on multi-sensor fusion according to claim 1, characterized in that: The clamping roller (23) is provided with an anti-slip groove (231) along the circumference. An anti-slip ring (232) is provided inside the anti-slip groove (231). The outer edge of the anti-slip ring (232) protrudes from the opening of the anti-slip groove (231). An anti-slip ruler ring (233) is provided on the inner edge of the anti-slip ring (232). An anti-slip tooth groove (234) is provided at the bottom of the anti-slip groove (231). The anti-slip ruler ring (233) meshes with the anti-slip tooth groove (234).

8. The crankshaft geometric parameter measurement system based on multi-sensor fusion according to claim 7, characterized in that: The anti-slip ring (232) has an air channel (235) inside, and the clamping frame (22) is provided with a squeezing mechanism (4) for squeezing the anti-slip ring (232) to push air toward the air channel (235) near the crankshaft.

9. A crankshaft geometric parameter measurement system based on multi-sensor fusion according to claim 8, characterized in that: The extrusion mechanism (4) includes an extrusion block (41) and a trigger rod (42) slidably connected to the clamping frame (22). The extrusion block (41) is rotatably connected to an extrusion wheel (43) on the side near the crankshaft. The trigger rod (42) is rotatably connected to a trigger wheel (44) on the end near the crankshaft. The clamping frame (22) is rotatably provided with a trigger gear (45). Both the extrusion wheel (43) and the trigger rod (42) are provided with trigger racks (46). The two trigger racks (46) mesh with the two sides of the trigger gear (45) respectively.

10. A measurement method for a crankshaft geometric parameter measurement system based on multi-sensor fusion according to any one of claims 1-9, characterized in that: First, the main journal (51) is clamped by several clamping rollers (23), and the main journal (51) is rotated by a rotary drive (24). At the same time, the main journal (51) is in a circular motion state relative to the worktable (1) and the single-side connecting rod journal (52) is in a rotation state relative to the worktable (1). In this state, the single-side connecting rod journal (52) is detected. Then, several clamping rollers (23) are used to clamp the connecting rod journal (52), and the connecting rod journal (52) is rotated by the rotation drive (24). At the same time, the horizontal adjustment mechanism (3) and the vertical adjustment mechanism (12) are used to realize that the connecting rod journal (52) is in a circular motion state relative to the worktable (1), and the main journal (51) is in a rotation state relative to the worktable (1). In this state, all the main journals (51) are inspected.

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