Crankshaft measuring servo

Abstract

This invention relates to the field of crankshaft measurement technology, specifically to a crankshaft measurement follow-up device, comprising a main unit including a main shaft and a crankshaft mounted on the main shaft; a measurement unit including two sets of symmetrically distributed measurement supports mounted on the crankshaft, displacement sensors mounted on the two sets of measurement supports respectively, and displacement measurement mechanisms mounted on the two sets of measurement supports respectively; and an adjustment unit. By employing a follow-up measurement structure combined with dual-mode displacement detection, it achieves full-cycle dynamic measurement of the crankshaft in rotation, effectively improving the authenticity and reliability of the measurement data. It sets two measurement modes—axial relative illumination and radial non-relative illumination—and automatically switches between them, further improving the integrity and accuracy of the follow-up measurement. An angle sensor continuously provides a stable and synchronous angle reference, achieving precise binding of displacement data and rotation angle, effectively improving measurement timing consistency and position positioning accuracy.

Description

Technical Field

[0001] This invention relates to the field of crankshaft measurement technology, and more specifically to a crankshaft measurement follower device. Background Technology

[0002] Diesel engines, as the core components of industrial power equipment, are widely used in important equipment fields such as ships, engineering machinery, and generator sets. Their operational reliability is directly related to the safe and stable operation of the entire equipment. As the core moving component of a diesel engine, the crankshaft continuously bears the combined effects of periodic combustion gas bursts, inertial forces, and torsional torques during operation. Its geometric accuracy, stress deformation, radial runout, and crankshaft pitch difference directly determine the diesel engine's power output performance, operational smoothness, vibration and noise levels, and overall service life. Therefore, accurate and realistic condition testing of the crankshaft is a key link in ensuring the healthy operation of diesel engines and avoiding failure risks in advance. Currently, most of the crankshaft measurement technologies commonly used in the industry can only be tested when the crankshaft is stationary and not in operation. However, the detection environment under static conditions differs greatly from the actual working environment of the crankshaft. The data obtained can only reflect the static dimensions and position information of the crankshaft under no-load, no-vibration, and no-rotational-force conditions. It cannot truly reflect the dynamic deformation, real-time displacement, radial runout, and cranking difference changes of the crankshaft under high-speed rotation, periodic impact force, high-temperature vibration, and continuous operation conditions. As a result, the measurement results deviate from the actual working state of the crankshaft. It is difficult to accurately capture the small deformations and abnormal changes of the crankshaft under dynamic force, and it is impossible to identify potential wear, bending, fatigue damage, and installation misalignment of the crankshaft in a timely manner. This leads to distorted equipment health assessment and delayed fault warning. In severe cases, it may cause diesel engine operation failure, resulting in shutdown, damage to key components, and other problems. In view of this, we propose a crankshaft measurement follower device. Summary of the Invention

[0003] To address the aforementioned shortcomings of existing technologies, this invention provides a crankshaft measurement follow-up device that effectively solves the problems of existing technologies that detect crankshafts in a static state, making it impossible to obtain dynamic data under real operating conditions, which can easily lead to measurement distortion, inaccurate fault diagnosis, and difficulty in ensuring the safe and stable operation of diesel engines.

[0004] To achieve the above objectives, the present invention provides the following technical solution: This invention provides a crankshaft measurement follower device, comprising a main unit including a main shaft, a crankshaft mounted on the main shaft, and a piston rod mounted on the crankshaft. The measuring unit includes two sets of measuring brackets symmetrically distributed on the crankshaft, displacement sensors respectively mounted on the two sets of measuring brackets, and displacement measuring mechanisms respectively mounted on the two sets of measuring brackets; The adjustment unit includes adjustment boxes respectively mounted on two sets of measuring supports, a drive mechanism mounted on the adjustment boxes, an adjustment mechanism mounted on the adjustment boxes for adjusting the direction of the displacement measuring mechanism, and a control mechanism mounted on the adjustment boxes for adjusting the measurement state of the displacement measuring mechanism.

[0005] Furthermore, one side of the crankshaft is fixedly connected to one side of the two sets of measuring brackets, and the side of the measuring bracket away from the crankshaft is fixedly connected to one side of the angle sensor.

[0006] Furthermore, the adjustment box is located on one side of the angle sensor, and one side of the adjustment box is fixedly connected to the side of the measuring bracket away from the crankshaft.

[0007] Furthermore, the drive mechanism includes a micro motor fixedly connected to the inner wall of the adjustment box. The micro motor is fixedly connected to a drive gear for transmission cooperation with the adjustment mechanism via an output shaft. The drive gear is radially meshed with a driven gear for transmission cooperation with the control mechanism. Both the drive gear and the driven gear are rotatably connected to the inner wall of the adjustment box on their axial sides.

[0008] Furthermore, the adjustment mechanism includes a rack meshing with the radial side of the drive gear, a fixed block fixedly connected to the side of the rack away from the drive gear, and a connecting rod rotatably connected to the top of the fixed block for connecting with the displacement measuring mechanism.

[0009] Furthermore, a guide wheel is rotatably connected to the bottom of the fixed block, and a guide rail is slidably connected to the surface of the guide wheel. The bottom of the guide rail is fixedly connected to the inner wall of the adjustment box.

[0010] Furthermore, the control mechanism includes two sets of contact switches fixed to the inner wall of the adjustment box. The two sets of contact switches are symmetrically distributed, and a cam is provided between the two sets of contact switches. The cam is fixedly connected to the top of the driven gear, and the driven gear is used to drive the cam to press the switch button of the two sets of contact switches.

[0011] Furthermore, the displacement measuring mechanism includes two sets of rear fixing ears rotatably connected to one side of the adjustment box, and displacement sensors are fixedly connected to the side of the two sets of rear fixing ears away from the adjustment box. Side fixing ears are fixedly connected to one side of the two sets of displacement sensors, and the side fixing ears away from the displacement sensors are rotatably connected to the end of the connecting rod away from the fixed block.

[0012] Furthermore, the two sets of displacement sensors have two sets of measurement directions, namely, relative illumination in the axial direction along the crankshaft and non-relative illumination in the radial direction along the crankshaft.

[0013] Furthermore, the control mechanism also includes a control module, a data processing module, and a wireless data transmission module, and both sets of contact switches are electrically connected to the control module; The control module is used to control the data processing module to record the measurement data of the displacement sensor under axial relative illumination, the measurement data of the displacement sensor under radial non-relative illumination, and the measurement data of the angle sensor under axial relative illumination. The wireless data transmission module is used to transmit the measurement data outward.

[0014] The technical solution provided by this invention has the following advantages compared with known public technologies: This invention employs a design that combines a follow-up measurement structure with dual-mode displacement detection, enabling the measurement component to rotate synchronously with the crankshaft. This achieves full-cycle dynamic measurement during crankshaft rotation, effectively improving the authenticity and reliability of the measurement data. It features two measurement modes: axial relative illumination and radial non-relative illumination, which can be automatically switched. This allows for both overall crankshaft deformation measurement and local micro-deformation capture, covering the measurement needs of different rotational sections and further enhancing the integrity and accuracy of the follow-up measurement. By continuously providing a stable and synchronized angle reference through an angle sensor, precise binding of displacement data and rotation angle is achieved, effectively improving measurement timing consistency and position positioning accuracy. At the same time, in conjunction with the corresponding sub-algorithm data processing method, the analytical logic can be automatically adapted according to different measurement modes, accurately identifying displacement extremes and automatically calculating the corner difference, which can further improve data processing efficiency and calculation accuracy. Through the integration of control module, data processing module and wireless data transmission module, automatic acquisition, intelligent analysis, classified storage and remote transmission of measurement data can be realized, which can provide reliable guarantee for diesel engine health monitoring, fault early warning and precise maintenance. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 For the present invention Figure 1 Enlarged schematic diagram of the structure at point A; Figure 3 This is a cross-sectional view of the adjustment box of the present invention; Figure 4 This is a schematic diagram of the displacement measuring mechanism and adjustment unit of the present invention; Figure 5 This is a schematic diagram of the drive mechanism and control mechanism of the present invention; Figure 6 This is a schematic diagram of the drive mechanism and adjustment mechanism of the present invention; Figure 7 This is a schematic diagram of the disassembled structure of the adjustment mechanism of the present invention; Figure 8 This is a schematic diagram of the displacement sensor direction switching according to the present invention.

[0017] The labels in the diagram represent: 100, main unit; 101, main shaft; 102, crankshaft; 103, piston rod; 200. Measuring unit; 201. Measuring bracket; 202. Angle sensor; 203. Displacement measuring mechanism; 2031. Displacement sensor; 2032. Rear fixing lug; 2033. Side fixing lug; 300. Adjustment unit; 301. Adjustment box; 302. Drive mechanism; 3021. Micro motor; 3022. Driven gear; 3023. Drive gear; 303. Adjustment mechanism; 3031. Rack; 3032. Connecting rod; 3033. Guide rail; 3034. Fixing block; 3035. Guide wheel; 304. Control mechanism; 3041. Contact switch; 3042. Cam. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0019] The present invention will be further described below with reference to embodiments.

[0020] like Figures 1 to 8As shown, a crankshaft measurement follow-up device includes a main unit 100, including a main shaft 101, a crankshaft 102 mounted on the main shaft 101, and a piston rod 103 mounted on the crankshaft 102. It also includes a measurement unit 200, comprising two sets of measurement supports 201 symmetrically distributed on the crankshaft 102, displacement sensors 2031 respectively mounted on the two sets of measurement supports 201, and displacement measuring mechanisms 203 respectively mounted on the two sets of measurement supports 201. An adjustment unit 300 includes an adjustment box 301 respectively mounted on the two sets of measurement supports 201, a drive mechanism 302 mounted on the adjustment box 301, and a mechanism for adjusting the direction of the displacement measuring mechanism 203 mounted on the adjustment box 301. The system includes an adjustment mechanism 303 for adjustment and a control mechanism 304 mounted on an adjustment box 301 for adjusting the measurement state of the displacement measuring mechanism 203. A crankshaft 102 is mounted on a main shaft 101, and a piston rod 103 is assembled on the crankshaft 102 and moves synchronously with the crankshaft 102. Two sets of measuring brackets 201 are symmetrically distributed on the crankshaft 102. A displacement sensor 2031 and a displacement measuring mechanism 203 are respectively mounted on the two sets of measuring brackets 201. An adjustment box 301 is mounted on the two sets of measuring brackets 201. A drive mechanism 302 is used to provide adjustment power. An adjustment mechanism 303 is used to realize the direction adjustment of the displacement measuring mechanism 203. A control mechanism 304 is used to realize the switching of the measurement state of the displacement measuring mechanism 203. Specifically, refer to Figures 1 to 3 One side of the crankshaft 102 is fixedly connected to one side of the two sets of measuring brackets 201. The side of the measuring bracket 201 away from the crankshaft 102 is fixedly connected to one side of the angle sensor 202. The adjustment box 301 is located on one side of the angle sensor 202. One side of the adjustment box 301 is fixedly connected to the side of the measuring bracket 201 away from the crankshaft 102. One side of the two sets of measuring brackets 201 is fixedly connected to the crankshaft 102. The side of the measuring bracket 201 away from the crankshaft 102 is fixedly connected to the angle sensor 202. The adjustment box 301 is located on one side of the angle sensor 202. The side of the adjustment box 301 away from the crankshaft 102 is fixedly connected to the measuring bracket 201, so that the adjustment box 301 rotates synchronously with the measuring bracket 201 and the crankshaft 102. Specifically, refer to Figure 4 and Figure 5The drive mechanism 302 includes a micro motor 3021 fixedly connected to the inner wall of the adjustment box 301. The micro motor 3021 is fixedly connected to a drive gear 3023 for transmission with the adjustment mechanism 303 via an output shaft. The drive gear 3023 is radially meshed with a driven gear 3022 for transmission with the control mechanism 304. Both the drive gear 3023 and the driven gear 3022 are rotatably connected to the inner wall of the adjustment box 301 on one axial side. The micro motor 3021 is fixed to the inner wall of the adjustment box 301. The output shaft of the micro motor 3021 is connected to the drive gear 3023. The drive gear 3023 and the driven gear 3022 mesh and transmit power. The drive gear 3023 cooperates with the adjustment mechanism 303, and the driven gear 3022 cooperates with the control mechanism 304. Specifically, refer to Figure 4 , Figure 6 and Figure 7 The adjusting mechanism 303 includes a rack 3031 that meshes with the drive gear 3023 on one radial side. A fixing block 3034 is fixedly connected to the side of the rack 3031 away from the drive gear 3023. A connecting rod 3032 for connecting to the displacement measuring mechanism 203 is rotatably connected to the top of the fixing block 3034. A guide wheel 3035 is rotatably connected to the bottom of the fixing block 3034. A guide rail 3033 is slidably connected to the surface of the guide wheel 3035. The bottom of the guide rail 3033 is fixedly connected to the inner wall of the adjusting box 301. The rack 3031 meshes with the drive gear 3023. The side of the rack 3031 away from the drive gear 3023 is connected to the fixed block 3034. The top of the fixed block 3034 is rotatably connected to the connecting rod 3032, which is connected to the displacement measuring mechanism 203. The bottom of the fixed block 3034 is rotatably connected to the guide wheel 3035, which is slidably engaged with the guide rail 3033. The bottom of the guide rail 3033 is fixed to the inner wall of the adjusting box 301, providing movement guidance for the fixed block 3034 and the rack 3031. Specifically, refer to Figure 4 and Figure 5 The control mechanism 304 includes two sets of contact switches 3041 fixed to the inner wall of the adjustment box 301. The two sets of contact switches 3041 are symmetrically distributed, and a cam 3042 is provided between the two sets of contact switches 3041. The cam 3042 is fixedly connected to the top of the driven gear 3022, and the driven gear 3022 is used to drive the cam 3042 to press the switch buttons of the two sets of contact switches 3041. The two sets of contact switches 3041 are symmetrically fixed to the inner wall of the adjustment box 301, and the cam 3042 is fixed to the top of the driven gear 3022. The driven gear 3022 drives the cam 3042 to rotate, so that the cam 3042 can press the switch buttons of the two sets of contact switches 3041 in sequence. The two sets of contact switches 3041 are electrically connected to an external control circuit for outputting trigger signals for different measurement states. Specifically, refer to Figure 3 and Figure 4The displacement measuring mechanism 203 includes two sets of rear fixing ears 2032 rotatably connected to one side of the adjustment box 301. Displacement sensors 2031 are fixedly connected to the side of each set of rear fixing ears 2032 away from the adjustment box 301. Side fixing ears 2033 are fixedly connected to the side of each set of displacement sensors 2031. The end of the side fixing ear 2033 away from the displacement sensor 2031 is rotatably connected to the end of the connecting rod 3032 away from the fixing block 3034. The rear fixing ears 2032 are rotatably connected to one side of the adjustment box 301. Displacement sensors 2031 are fixed to the side of the rear fixing ears 2032 away from the adjustment box 301. The side fixing ears 2033 are fixed to the displacement sensors 2031. The end of the side fixing ears 2033 away from the displacement sensor 2031 is rotatably connected to the end of the connecting rod 3032 away from the fixing block 3034. The connecting rod 3032 drives the displacement sensor 2031 to rotate around the rear fixing ears 2032, thereby adjusting the measurement direction. Specifically, refer to Figure 8 The two sets of displacement sensors 2031 have two sets of measurement directions: one is relative illumination along the axial direction of the crankshaft 102, and the other is non-relative illumination along the radial direction of the crankshaft 102. The two sets of displacement sensors 2031 have two sets of measurement directions, one is relative illumination along the axial direction of the crankshaft 102, and the other is non-relative illumination along the radial direction of the crankshaft 102. The two directions can be switched by the adjustment mechanism 303 to adapt to different measurement conditions. The two sets of angle sensors 202 are always relative illumination along the axial direction of the crankshaft 102 to collect the rotation angle signal of the crankshaft 102 in real time and provide an angle reference for displacement measurement. It should be noted that the control mechanism 304 also includes a control module, a data processing module, and a wireless data transmission module. Both sets of contact switches 3041 are electrically connected to the control module. The control module is used to control the data processing module to record the measurement data of the displacement sensor 2031 under axial relative illumination, the displacement sensor 2031 under radial non-relative illumination, and the angle sensor 202 under axial relative illumination. The wireless data transmission module is used to transmit the measurement data outward. Both sets of contact switches 3041 are electrically connected to the control module. When one set of contact switches 3041 is triggered, the control module controls the data processing module to record the measurement data of the displacement sensor 2031 under axial relative illumination. When the other set of contact switches 3041 is triggered, the control module controls the data processing module to record the measurement data of the displacement sensor 2031 under radial non-relative illumination. At the same time, the data processing module synchronously records the angle measurement data of the angle sensor 202 under axial relative illumination. All measurement data is transmitted outward by the wireless data transmission module, realizing data acquisition and remote transmission.

[0021] The working principle of the present invention is as follows: When the device is working, the measuring bracket 201, the adjusting box 301, the angle sensor 202 and the displacement sensor 2031 rotate synchronously with the crankshaft 102 to form a follow-up dynamic measurement system. The system follows the movement of the crankshaft 102 throughout the entire process to collect displacement and angle information under real working conditions, so as to realize uninterrupted, high-precision and full-cycle measurement under the 360-degree rotation state of the crankshaft 102. The two sets of angle sensors 202 always maintain relative illumination along the axial direction of the crankshaft 102, continuously collecting the real-time rotation angle signal of the crankshaft 102, providing a unique, stable, and synchronous angle reference for the entire measurement system. Regardless of the measurement mode of the displacement sensor 2031, the angle signal is bound to the displacement signal at the same time, at the same point, and with the same period, ensuring that each set of displacement data can accurately correspond to the rotation position of the crankshaft 102, avoiding measurement distortion caused by angle deviation, greatly improving the timing consistency and position positioning accuracy of dynamic measurement, and providing a reliable angle basis for subsequent crankshaft differential calculation. The displacement sensor 2031 is equipped with two measurement modes: axial relative illumination and radial non-relative illumination. The purpose of switching between the two modes is to improve the integrity and accuracy of the follow-up measurement during the movement of the crankshaft 102, and to adapt to the measurement requirements of different rotation sections of the crankshaft 102, so as to achieve the measurement of both overall deformation and local micro deformation. In the axial relative illumination mode, two sets of displacement sensors 2031 are irradiated against each other along the crankshaft 102 axial direction, and the overall spacing reference is formed by the irradiated optical path. This can stably capture the comprehensive radial deformation, axial movement and overall deflection changes during the rotation of the crankshaft 102. It has a large measurement range and strong stability, and is suitable for the overall state acquisition of the smooth rotation section of the crankshaft 102. In the radial non-relative illumination mode, the two sets of displacement sensors 2031 are independently irradiated radially along the crankshaft 102, without irradiating each other. Each sensor collects the local radial runout, instantaneous micro-deformation, and displacement of stress concentration areas at the corresponding measuring points. This mode can capture subtle abnormal changes that are difficult to identify in the axial relative illumination mode. It is suitable for high-precision acquisition of crankshaft 102 in areas with sudden force changes, rapid angle changes, and sensitive local deformation. The two measurement modes can be switched automatically to cover different stress states and deformation characteristics of the crankshaft 102 throughout its entire rotation cycle, avoiding data loss or insufficient accuracy caused by a single measurement mode, and significantly improving the comprehensiveness and accuracy of the follow-up measurement. The switching of measurement modes is automatically driven by the adjustment unit 300. The micro motor 3021 in the drive mechanism 302 drives the active gear 3023 and the driven gear 3022 to rotate synchronously. The active gear 3023 drives the rack 3031 and the fixed block 3034 to move along the guide rail 3033. Through the connecting rod 3032, the displacement sensor 2031 is pushed to rotate around the rear fixed ear 2032, so as to achieve precise switching of measurement direction. At the same time, the driven gear 3022 drives the cam 3042 to rotate, and the cam 3042 presses two sets of contact switches 3041 in sequence, outputting the corresponding mode trigger signal to the control module to realize the positioning and confirmation of the measurement status. After receiving the signal from the contact switch 3041, the control module automatically matches the corresponding data processing algorithm according to the current measurement mode. When in the axial relative illumination mode, the data processing module uses the spacing difference algorithm to calculate the overall deformation and comprehensive displacement of the crankshaft 102 by subtracting the real-time distance between the two sets of sensors from the reference distance. When in radial non-relative illumination mode, the data processing module uses a single-point radial displacement algorithm to collect and analyze the local displacement information of the two sensors respectively, and extract the instantaneous jump and micro-deformation of the measuring point. Meanwhile, the data processing module couples the displacement data with the angle data collected by the angle sensor 202 in real time to establish the correspondence between angle and displacement. Combined with the structural parameters and rotation period of the crankshaft 102, it automatically identifies the highest and lowest positions of the measuring points through dynamic extreme value identification, interval difference calculation, and trajectory fitting, and automatically calculates the crankshaft 102 bend difference to complete the entire process of dynamic measurement. Ultimately, the control module classifies, stores, and organizes the raw data, calculation results, angle information, and crankshaft difference values ​​from the two measurement modes, and transmits them out in real time through the wireless data transmission module. This enables automatic acquisition, intelligent processing, accurate calculation, stable storage, and remote transmission of dynamic measurement data, fully reflecting the true state of the crankshaft 102 during rotational motion and providing effective protection for diesel engine health monitoring, fault warning, and precise maintenance.

[0022] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A crankshaft measuring follower device, comprising a main unit (100), including a main shaft (101), a crankshaft (102) disposed on the main shaft (101), and a piston rod (103) disposed on the crankshaft (102), characterized in that, include, The measuring unit (200) includes two sets of measuring brackets (201) symmetrically distributed on the crankshaft (102), displacement sensors (2031) respectively disposed on the two sets of measuring brackets (201), and displacement measuring mechanisms (203) respectively disposed on the two sets of measuring brackets (201). The adjustment unit (300) includes an adjustment box (301) respectively disposed on two sets of measuring brackets (201), a drive mechanism (302) disposed on the adjustment box (301), an adjustment mechanism (303) disposed on the adjustment box (301) for adjusting the direction of the displacement measuring mechanism (203), and a control mechanism (304) disposed on the adjustment box (301) for adjusting the measurement state of the displacement measuring mechanism (203).

2. The crankshaft measuring follower device according to claim 1, characterized in that, One side of the crankshaft (102) is fixedly connected to one side of the two sets of measuring brackets (201), and the side of the measuring bracket (201) away from the crankshaft (102) is fixedly connected to one side of the angle sensor (202).

3. The crankshaft measuring follower device according to claim 1, characterized in that, The adjustment box (301) is located on one side of the angle sensor (202), and one side of the adjustment box (301) is fixedly connected to the side of the measuring bracket (201) away from the crankshaft (102).

4. The crankshaft measuring follower device according to claim 1, characterized in that, The drive mechanism (302) includes a micro motor (3021) fixedly connected to the inner wall of the adjustment box (301). The micro motor (3021) is fixedly connected to a drive gear (3023) for transmission cooperation with the adjustment mechanism (303) via an output shaft. The drive gear (3023) is meshed with a driven gear (3022) for transmission cooperation with the control mechanism (304) on one radial side. The drive gear (3023) and the driven gear (3022) are rotatably connected to the inner wall of the adjustment box (301) on one axial side.

5. The crankshaft measuring follower device according to claim 1, characterized in that, The adjustment mechanism (303) includes a rack (3031) meshing with the radial side of the drive gear (3023), a fixed block (3034) fixedly connected to the side of the rack (3031) away from the drive gear (3023), and a connecting rod (3032) rotatably connected to the top of the fixed block (3034) for connecting with the displacement measuring mechanism (203).

6. A crankshaft measuring follower device according to claim 5, characterized in that, The bottom of the fixed block (3034) is rotatably connected to a guide wheel (3035), and the surface of the guide wheel (3035) is slidably connected to a guide rail (3033). The bottom of the guide rail (3033) is fixedly connected to the inner wall of the adjustment box (301).

7. A crankshaft measuring follower device according to claim 1, characterized in that, The control mechanism (304) includes two sets of contact switches (3041) fixed to the inner wall of the adjustment box (301). The two sets of contact switches (3041) are symmetrically distributed. A cam (3042) is provided between the two sets of contact switches (3041). The cam (3042) is fixedly connected to the top of the driven gear (3022), and the driven gear (3022) is used to drive the cam (3042) to press the switch button of the two sets of contact switches (3041).

8. A crankshaft measuring follower device according to claim 1, characterized in that, The displacement measuring mechanism (203) includes two sets of rear fixing ears (2032) rotatably connected to one side of the adjustment box (301). Displacement sensors (2031) are fixedly connected to the side of the two sets of rear fixing ears (2032) away from the adjustment box (301). Side fixing ears (2033) are fixedly connected to the side of the two sets of displacement sensors (2031). The end of the side fixing ear (2033) away from the displacement sensor (2031) is rotatably connected to the end of the connecting rod (3032) away from the fixing block (3034).

9. A crankshaft measuring follower device according to claim 8, characterized in that, The two sets of displacement sensors (2031) have two sets of measurement directions, which are respectively axial directions of rotation along the crankshaft (102) and non-relative directions of rotation along the crankshaft (102).

10. A crankshaft measuring follower device according to claim 1, characterized in that, The control mechanism (304) also includes a control module, a data processing module and a wireless data transmission module, and both sets of contact switches (3041) are electrically connected to the control module; The control module is used to control the data processing module to record the measurement data of the displacement sensor (2031) under axial relative illumination, the measurement data of the displacement sensor (2031) under radial non-relative illumination, and the measurement data of the angle sensor (202) under axial relative illumination. The wireless data transmission module is used to transmit the measurement data outward.

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