Crankshaft measurement follow-up device

Abstract

The invention discloses a crankshaft measurement follow-up device in the technical field of diesel engine maintenance, which comprises two groups of symmetrically arranged mounting units, a measurement unit erected on the two groups of mounting units, an abdicating unit arranged on one group of mounting units, and a displacement sensor arranged on the side surface of the other group of mounting units, the measuring unit comprises an auxiliary measuring part and a displacement sensor which are respectively arranged on the two groups of mounting units, a switching part arranged on the side surface of the auxiliary measuring part, and a connecting shaft rotationally connected to the tail end of the switching part, the tail end of the switching part extends into the base, and the connecting shaft is connected with the abdicating unit. The measuring unit is set up between the two groups of cranks to measure the distance between the cranks in real time, and the measuring unit can move along with the rotating cranks, so that the function of measuring the crank gear value between the cranks in real time under the condition that the cranks rotate by 360 degrees is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of diesel engine maintenance, in particular to a crankshaft measuring follower device. Background Art

[0002] The crankshaft is one of the key components of a diesel engine. Its working condition directly affects the safe operation of the diesel engine. To ensure the performance and reliability of the engine, extend the service life of the engine, avoid serious accidents caused by crankshaft failure, and ensure the safety of equipment and personnel, people will perform precise measurements on the diesel engine crankshaft. Among them, the distance between the two sets of cranks on each section (kick-off value) is an important data that needs to be collected during the precise measurement work.

[0003] However, existing measurement technologies usually need to be carried out when the crankshaft is stationary, and the measurement must be performed manually after the crankshaft is stationary. A crankshaft usually contains multiple points to be measured, and each point is at a different position. Therefore, after measuring one point, the crankshaft needs to be driven again to expose the next point. It can be seen that the implementation of existing measurement technologies obviously has problems such as high labor intensity, cumbersome operation steps, and low work efficiency. At the same time, due to the large distance between the two cranks, the accuracy of the infrared measurement equipment used in the existing measurement technology cannot meet the actual use requirements. Therefore, the measurement accuracy and degree of automation need to be improved. Therefore, developing a device that can perform high-precision and automated measurement when the crankshaft is rotating is of great significance to improving the efficiency and accuracy of diesel engine maintenance. Summary of the Invention

[0004] In view of the above-mentioned problems existing in the existing crankshaft measurement follower device, the present invention proposes a crankshaft measurement follower device to solve such problems.

[0005] To solve the above technical problems, the present invention provides the following technical solutions: a crankshaft measurement follower device, comprising two symmetrically arranged mounting units, a measuring unit mounted on the two mounting units, a yield unit arranged on one of the mounting units, and an angle sensor arranged on the side of the other mounting unit, the measuring unit comprising an auxiliary measuring component and a displacement sensor respectively arranged on the two mounting units, a transition component arranged on the side of the auxiliary measuring component, the distal end of the transition component extending into the base, and a connecting shaft rotatably connected to the distal end of the transition component, the connecting shaft being connected to the yield unit, an auxiliary rod extending from the side of the auxiliary measuring component toward the displacement sensor, the transition component rotatably connected to the base, a vertical shaft arranged below the transition component, and the connecting shaft rotatably connected to the distal end of the vertical shaft; The yield unit includes a contact component rotatably connected to the mounting unit, a driven component located on the side of the contact component, and a reset component arranged on the driven component. The contact component includes a gear plate located in the mounting unit, and an extension rod arranged on the side of the gear plate and extending laterally outward. The driven component includes a rack vertically inserted into the mounting unit, and the side of the rack is engaged with the gear plate, an arc-shaped frame arranged on the side of one end of the rack and having an arc-shaped structure, and an arc groove matching the arc groove, and the connecting shaft is inserted into the arc groove.

[0006] As a preferred solution of the crankshaft measurement follower device described in the present invention, the auxiliary measuring component also includes an adapter assembly connected to the side of the adapter component, and the displacement sensor includes a main body assembly fixedly connected to another group of mounting units, and a measuring assembly arranged on the side of the main body assembly, and the measuring assembly is close to the outer end of the adapter assembly.

[0007] As a preferred solution of the crankshaft measurement follower device described in the present invention, the adapter component includes an adapter frame connected to the side of the auxiliary measuring component, and a horizontal axis laterally arranged on the upper side of the adapter frame, and the horizontal axis is rotatably connected to the mounting unit, and the vertical axis is fixedly connected to the horizontal axis in the vertical direction.

[0008] As a preferred solution of the crankshaft measurement follower device of the present invention, the connecting shaft includes a sleeve inserted in the arc groove, and a shaft inserted in the sleeve, and the top end of the shaft is rotatably connected to the end of the vertical shaft.

[0009] As a preferred solution of the crankshaft measurement follower device described in the present invention, the contact component also includes a contact ball arranged at the outer end of the extension rod, and the contact ball is a spherical structure with a diameter greater than the width of the extension rod, a stop block is provided above one end of the rack, and a receiving groove is provided in the stop block, the reset component includes a positioning shaft with one end inserted into the receiving groove, and the other end of the positioning shaft is fixedly connected to the mounting unit, and a spring sleeved on the positioning shaft.

[0010] As a preferred solution of the crankshaft measurement follower device described in the present invention, the measuring unit and the displacement sensor are wirelessly connected to an external terminal device, the terminal device includes a wireless data transmission module, a display module and a data processing module, and the wireless data transmission module supports WiFi and Bluetooth.

[0011] As a preferred solution of the crankshaft measurement follower device of the present invention, the mounting unit includes a base and a magnetic base arranged below the base, and two sets of screws are arranged below the magnetic base.

[0012] As a preferred solution of the crankshaft measurement follower device described in the present invention, a low-level groove is provided inside the mounting unit, and the contact component is located inside the base. A high-level groove with a height greater than the low-level groove is also provided inside the base, and the driven component and the reset component are installed in the high-level groove.

[0013] As a preferred solution of the crankshaft measurement follower device described in the present invention, a limiting groove is vertically opened on the base, and the vertical shaft is inserted into the connecting ear, connecting ears are provided on both sides above the limiting groove, and the adapter is rotatably connected to the connecting ear.

[0014] The beneficial effects of the present invention are as follows: by arranging a set of mounting units on the symmetrically arranged cranks, the two sets of mounting units cooperate with each other to build a measuring unit for measuring between the two sets of cranks. The measuring unit built between the two sets of cranks can measure the distance between the cranks in real time, thereby achieving the purpose of collecting the bending gear value between the two sets of cranks. At the same time, one end of the measuring unit is connected to a yield unit, which can prevent the measuring unit used for measurement from obstructing the normal movement of the piston rod when the crankshaft rotates. When the position of the piston rod and the measuring unit coincides, the yield unit drives the measuring unit to lift up and give way. When the position of the piston rod and the measuring unit does not coincide, the yield unit promptly drives the bottom of the measuring unit to reset, so that the measuring unit can move with the rotating crankshaft, thereby realizing the function of real-time measurement of the gear shift value between the cranks when the crankshaft rotates 360 degrees; At the same time, an angle sensor is installed on the side of one of the mounting units, and the displacement sensor can record the position data of the measuring unit at different angles when it follows the rotation of the crankshaft. The device also includes a terminal device, which includes a wireless data transmission module, a display module and a data processing module. The measuring unit and the displacement sensor are connected to the terminal device through the wireless data transmission module. Through the cooperation of the wireless data transmission module and the displacement sensor, the turning gear values ​​measured by the measuring unit at different angle positions can be transmitted to the data processing module of the terminal device. The data processing module can automatically calculate the turning gear difference and transmit the data to the terminal device in real time, thereby making the device have the advantages of high precision, automation and real-time data transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be derived from these drawings without inventive efforts. Among them: Figure 1 It is a schematic diagram of the overall structure of the crankshaft measurement follower device of the present invention.

[0016] Figure 2 This is an overall schematic diagram of the crankshaft measurement follower installation unit of the present invention.

[0017] Figure 3 This is a schematic diagram of the abutment position between the crankshaft measurement follower device mounting unit and the crank of the present invention.

[0018] Figure 4 It is a schematic structural diagram of the measuring unit of the crankshaft measuring follower device of the present invention.

[0019] Figure 5 This is a schematic structural diagram of the yield unit of the crankshaft measurement follower device of the present invention.

[0020] Figure 6 This is a schematic structural diagram of the driven component of the crankshaft measurement follower device of the present invention.

[0021] Figure 7 This is a cross-sectional schematic diagram of the crankshaft measurement follower device adapter assembly in the yielding state of the present invention.

[0022] Figure 8 Schematic diagram of the displacement sensor of the crankshaft measuring follower device measuring different angular positions of the present invention.

[0023] Reference numerals: 1, mounting unit; 11, base; 111, low slot; 112, limit slot; 113, connecting ear; 114, high slot; 115, quadrilateral block; 12, magnetic base; 121, screw; 2, measuring unit; 21, auxiliary measuring component; 211, adapter assembly; 212, auxiliary rod; 22, displacement sensor; 221, main assembly; 222, measuring assembly; 23, adapter assembly; 231, adapter frame; 232, horizontal axis; 233, Vertical shaft; 24, connecting shaft; 241, bushing; 242, shaft; 3, yielding unit; 31, contact component; 311, gear plate; 312, extension rod; 313, contact ball; 32, driven component; 321, rack; 322, arc frame; 323, arc groove; 324, stop block; 325, storage groove; 33, reset component; 331, positioning shaft; 332, spring; 4, angle sensor; 5, crank; 51, point position; 6, main shaft; 7, piston rod. DETAILED DESCRIPTION

[0024] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0025] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0026] Reference Figures 1 to 8 , which is an embodiment of the present invention, includes a crankshaft measurement follower device, including two symmetrically arranged mounting units 1, measuring units 2 mounted on the two mounting units 1, a yield unit 3 provided on one of the mounting units 1, and an angle sensor 4 provided on the side of the other mounting unit 1. The two mounting units 1 are respectively mounted on two symmetrical cranks 5. The mounting units 1 are used to mount fixed measuring units 2, and the measuring units 2 are used to measure the bending value between the two cranks 5. The angle sensor 4 is used to measure the angular position of the measuring units 2. The measuring unit 2 includes an auxiliary measuring component 21 and a displacement sensor 22, each mounted on the two mounting units 1. An adapter component 23 is mounted on the side of the auxiliary measuring component 21, with the distal end of the adapter component 23 extending into the base 11. A connecting shaft 24 is rotatably connected to the distal end of the adapter component 23 and connected to the retracting unit 3. An auxiliary rod 212 extends from the side of the auxiliary measuring component 21 toward the displacement sensor 22. The adapter component 23 is rotatably connected to the base 11, and a vertical shaft 233 is disposed below the adapter component 23. The connecting shaft 24 is rotatably connected to the distal end of the vertical shaft 233. Reference Figure 1 The auxiliary measuring component 21 and the displacement sensor 22 are respectively fixed on the two sets of cranks 5, and the auxiliary rod 212 shortens the connection distance between the auxiliary measuring component 21 and the displacement sensor 22. By adding the length of the auxiliary rod 212 and the distance between the displacement sensor 22 and the auxiliary rod 212, the bending gear difference between the two sets of cranks 5 can be obtained. Since the distance between the displacement sensor 22 and the auxiliary rod 212 is short, the displacement sensor 22 can accurately measure the distance data between itself and the auxiliary rod 212, thereby ensuring the accuracy of the measurement work; The yield unit 3 includes a contact member 31 rotatably connected to the mounting unit 1, a driven member 32 located on the side of the contact member 31, and a reset member 33 provided on the driven member 32. The contact member 31 includes a gear plate 311 located in the mounting unit 1, and an extension rod 312 provided on the side of the gear plate 311 and extending laterally outward. The driven member 32 includes a rack 321 vertically inserted into the mounting unit 1, and the side of the rack 321 meshes with the gear plate 311, an arc-shaped frame 322 provided on the side of one end of the rack 321 and having an arc-shaped structure, and an arc groove 323 matching the arc groove 323 provided in the arc frame 322, and the connecting shaft 24 is inserted into the arc groove 323. Reference Figure 5 The extension rod 312 is at the front end of the auxiliary rod 212, so the extension rod 312 will contact the piston rod 7 first, and the gear plate 311 is engaged with the side of the rack 321, so the gear plate 311 can push the rack 321 to move when it rotates. One end of the arc groove 323 is attached to the rack 321, and the other end is farther away from the rack 321 in the horizontal direction. Therefore, there is a large distance between the components at both ends of the arc groove 323 in the horizontal direction. Since the connecting shaft 24 is located in the arc groove 323, when the driven component 32 moves, the arc frame 322 will push the connecting shaft 24 to move through the arc groove 323.

[0027] When the cam 32 is in the unlocked position, the gear 311 is rotated to move the cam 322 and the gear 323 is unlocked, and the cam 323 is unlocked. The adapter component 23 rotates clockwise on the mounting unit 1 as a whole, and the clockwise rotating adapter component 23 will lift the auxiliary rod 212 set horizontally, so that it is not between the two sets of cranks 5, forming a giving way action for the piston rod 7, and avoiding obstruction of the normal rotation of the crankshaft; and when the contact component 31 is squeezed and disappears by the piston rod 7, the reset component 33 will push the rack 321 to move in the opposite direction, and the rack 321 moving in the opposite direction will drive the driven component 32 to reset as a whole, and the reset driven component 32 will synchronously drive the connecting shaft 24, the adapter component 23, the auxiliary measuring component 21 and the contact component 31 to reset in the opposite direction, so that the auxiliary rod 212 continues to be horizontally erected between the two sets of cranks 5, and cooperates with the displacement sensor 22 to continue measuring.

[0028] In summary, refer to Figure 1 、 Figure 5 and Figure 7The auxiliary measuring component 21 and the displacement sensor 22 of the measuring unit 2 are respectively installed on the two sets of cranks 5 through two sets of mounting units 1. The auxiliary measuring component 21 and the displacement sensor 22 can record the deflection value between the two sets of cranks 5 in real time. When the crankshaft rotates as a whole, the crank 5 will drive the entire device to rotate with the main shaft 6 as the axis. When the horizontally mounted measuring unit 2 is about to coincide with the position of the piston rod 7, the contact component 31 will cooperate with the driven component 32 to lift the auxiliary rod 212 to make way. When the positions do not coincide, the making way unit 3 will promptly drive the auxiliary rod 212 to reset, so that the measuring unit 2 can move with the rotating crankshaft, thereby realizing the function of still being able to measure the deflection value between the cranks in real time when the crankshaft rotates 360 degrees.

[0029] The method of calculating the turning gear difference during crankshaft rotation by using this device is as follows: during the rotation measurement of the measuring unit 2, the angle sensor 4 will use the main shaft 6 as the circle point and the position of the measuring unit 2 in the initial state as the starting point to record the angular position of the measuring unit 2, and record the turning gear values ​​measured by the measuring unit 2 when the measuring unit 2 is at the four positions of 0°, 90°, 180° and 270° in turn, and subtract the turning gear values ​​at the 0° position from the 180° position, and subtract the turning gear values ​​at the 90° position from the 270° position. The calculated difference is the turning gear difference during the rotation of the crankshaft. By calculating whether the turning gear difference is within the qualified range, the working state and its own condition of the crankshaft can be judged.

[0030] Among them, reference Figure 4 The auxiliary measuring component 21 also includes an adapter component 211 connected to the side of the adapter component 23. The displacement sensor 22 includes a main component 221 fixedly connected to another group of mounting units 1, and a measuring component 222 arranged on the side of the main component 221, and the measuring component 222 is close to the outer end of the adapter component 211. The measuring component 222 can measure the distance between the auxiliary rod 212 by emitting and receiving infrared rays. The distance between the measuring component 222 and the auxiliary rod 212 is added to the length of the auxiliary rod 212 to obtain the inflection value between the two groups of cranks 5. Since the measuring component 222 and the auxiliary rod 212 are not directly connected, when the distance between the two groups of cranks 5 changes, the two can still perform distance measurement, ensuring the steady progress of the inflection value measurement.

[0031] Among them, reference Figure 4The adapter component 23 includes an adapter frame 231 connected to the side of the auxiliary measuring component 21, and a horizontal shaft 232 laterally arranged on the upper side of the adapter frame 231, and the horizontal shaft 232 is rotatably connected to the mounting unit 1, and the vertical shaft 233 is fixedly connected to the horizontal shaft 232 in the vertical direction. The adapter component 23 is rotatably connected to the base 11 through the horizontal shaft 232, and the vertical shaft 233 is vertically connected to the horizontal shaft 232. Under normal conditions, the adapter frame 231 drives the auxiliary measuring component 21 to be installed parallel to the mounting unit 1 as a whole. When the adapter frame 231 rotates clockwise with the horizontal shaft 232 as the axis center under the drive of the connecting shaft 24, the adapter component 23 will drive the auxiliary measuring component 21 to tilt upward as a whole, thereby forming the action of giving way to the piston rod 7.

[0032] Among them, reference Figure 4 The connecting shaft 24 includes a sleeve 241 inserted into the arc groove 323, and a shaft 242 inserted into the sleeve 241, and the top of the shaft 242 is rotatably connected to the end of the vertical shaft 233. The connecting shaft 24 can ensure that it is still connected to the vertical shaft 233 when it moves along the arc groove 323 through the cooperation between the sleeve 241 and the shaft 242, thereby realizing the rotation operation of the adapter 23 with the horizontal axis 232 as the axis.

[0033] Among them, reference Figure 5 The contact component 31 also includes a contact ball 313 provided at the outer end of the extension rod 312, and the contact ball 313 is a spherical structure with a diameter greater than the width of the extension rod 312. A stop block 324 is provided above one end of the rack 321, and a receiving groove 325 is provided in the stop block 324. The reset component 33 includes a positioning shaft 331 at one end inserted into the receiving groove 325, and the other end of the positioning shaft 331 is fixedly connected to the mounting unit 1, and a spring 332 sleeved on the positioning shaft 331. The contact ball 313 can move the extension rod 312 through the smooth outer wall of the spherical structure. The contact position between 312 and the piston rod 7 is converted from surface-to-surface contact to point-to-point contact, thereby avoiding a stuck state with the piston rod 7. The spring 332 is elastically supported against the stop block 324 and one end of the inner wall of the high-level groove 114, and can thereby apply a force to the driven component 32 as a whole to contract in the high-level groove 114 by squeezing the stop block 324. When the force applied by the contact component 31 to the driven component 32 to extend outward disappears, the spring 332 can elastically rebound and drive the driven component 32 and the contact component 31 in reverse to achieve a reset operation.

[0034] Among them, the measuring unit 2 and the angle sensor 4 are externally wirelessly connected to a terminal device, and the terminal device includes a wireless data transmission module, a display module and a data processing module. The wireless data transmission module supports WiFi and Bluetooth. Through the cooperation of the wireless data transmission module and the angle sensor 4, the inflection value measured by the measuring unit 2 at different angle positions can be transmitted to the data processing module of the terminal device. The data processing module can automatically calculate the inflection difference and transmit the data to the terminal device in real time. At the same time, the terminal device can achieve initial positioning by locating the position of the auxiliary measuring component 21 and the displacement sensor 22, that is, the position data of the auxiliary measuring component 21 and the displacement sensor 22 and the distance between the two are calculated and corrected to the initial point through the data processing module, so as to achieve the automatic correction function without additional adjustment of the position of the auxiliary measuring component 21 and the displacement sensor 22, thereby facilitating subsequent measurement work.

[0035] Among them, reference Figure 2 and Figure 3 The mounting unit 1 includes a base 11 and a magnetic base 12 arranged below the base 11, and two sets of screws 121 are arranged below the magnetic base. The magnetic base 12 is a common structure in the prior art. The magnetism is controlled by a knob switch. When it is turned on, it can be quickly adsorbed on the crank 5. When it is closed, the magnetic attraction action is released. The purpose of quick installation and fixation can be achieved through the magnetic base 12.

[0036] Furthermore, the hardness of the screw 121 is greater than that of the crank 5. When performing the measurement for the first time, the screw 121 can be struck to leave two sets of corresponding points 51 on the crank 5. Each time a measurement is performed thereafter, the two sets of screws 121 under the magnetic base 12 need to be installed into the corresponding points 51, thereby ensuring that the same position is measured each time and the accuracy of each measurement is guaranteed. Among them, reference Figure 5 A low-level groove 111 is provided inside the mounting unit 1, and the contact component 31 is located inside the base 11. A high-level groove 114 whose height is greater than the low-level groove 111 is also provided inside the base 11, and the driven component 32 and the reset component 33 are installed in the high-level groove 114. The low-level groove 111 and the high-level groove 114 have a height difference, so that the contact component 31 and the driven component 32 and the reset component 33 installed therein are not on the same plane, and thus no obstruction or influence will be caused.

[0037] Among them, reference Figure 2A limiting groove 112 is vertically opened on the base 11, and the vertical shaft 233 is inserted into the connecting ear 113. Connecting ears 113 are provided on both sides above the limiting groove 112, and the adapter component 23 is rotatably connected to the connecting ear 113. The limiting groove 112 limits the moving direction of the vertical shaft 233, so that the vertical shaft 233 and the connecting shaft 24 connected to its lower end can only move within the limiting groove 112.

[0038] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A crankshaft measuring follower device, comprising two symmetrically arranged mounting units (1), a measuring unit (2) mounted on the two mounting units (1), a yielding unit (3) arranged on one of the mounting units (1), and an angle sensor (4) arranged on the side of the other mounting unit (1), characterized in that: The measuring unit (2) comprises an auxiliary measuring component (21) and a displacement sensor (22) respectively arranged on two sets of mounting units (1), a transfer component (23) arranged on the side of the auxiliary measuring component (21), and the end of the transfer component (23) extends into the base (11), and a connecting shaft (24) rotatably connected to the end of the transfer component (23), and the connecting shaft (24) is connected to the displacement unit (3), an auxiliary rod (212) extends from the side of the auxiliary measuring component (21) toward the displacement sensor (22), the transfer component (23) is rotatably connected to the base (11), and a vertical shaft (233) is arranged below the transfer component (23), and the connecting shaft (24) is rotatably connected to the end of the vertical shaft (233); The yield unit (3) includes a contact component (31) rotatably connected to the mounting unit (1), a driven component (32) located on the side of the contact component (31), and a reset component (33) arranged on the driven component (32), wherein the contact component (31) includes a gear plate (311) located in the mounting unit (1), and an extension rod (312) arranged on the side of the gear plate (311) and extending laterally outward, the driven component (32) includes a rack (321) vertically inserted into the mounting unit (1), and the side of the rack (321) is engaged with the gear plate (311), an arc-shaped frame (322) arranged on the side of one end of the rack (321) and having an arc-shaped structure, and an arc groove (323) arranged in the arc frame (322), and the connecting shaft (24) is inserted into the arc groove (323).

2. The crankshaft measurement follower device according to claim 1, characterized in that: The auxiliary measuring component (21) further includes an adapter component (211) connected to a side of the adapter component (23); the displacement sensor (22) includes a main component (221) fixedly connected to another set of mounting units (1); and a measuring component (222) disposed on a side of the main component (221), wherein the measuring component (222) is close to an outer end of the adapter component (211).

3. The crankshaft measurement follower device according to claim 1, characterized in that: The adapter component (23) includes an adapter frame (231) connected to a side surface of the auxiliary measuring component (21), and a horizontal axis (232) arranged transversely on an upper side surface of the adapter frame (231), wherein the horizontal axis (232) is rotatably connected to the mounting unit (1), and the vertical axis (233) is fixedly connected to the horizontal axis (232) in a vertical direction.

4. The crankshaft measurement follower device according to claim 1, characterized in that: The connecting shaft (24) includes a shaft sleeve (241) inserted into the arc groove (323), and a shaft rod (242) inserted into the shaft sleeve (241), and the top end of the shaft rod (242) is rotatably connected to the end of the vertical shaft (233).

5. The crankshaft measurement follower device according to claim 1, characterized in that: The contact component (31) further includes a contact ball (313) arranged at the outer end of the extension rod (312), and the contact ball (313) is a spherical structure with a diameter greater than the width of the extension rod (312). A stop block (324) is provided above one end of the rack (321), and a receiving groove (325) is provided in the stop block (324). The reset component (33) includes a positioning shaft (331) one end of which is inserted into the receiving groove (325), and the other end of the positioning shaft (331) is fixedly connected to the mounting unit (1), and a spring (332) is sleeved on the positioning shaft (331).

6. The crankshaft measurement follower device according to claim 1, characterized in that: The measuring unit (2) and the angle sensor (4) are externally wirelessly connected to a terminal device, the terminal device comprising a wireless data transmission module, a display module and a data processing module, and the wireless data transmission module supports WiFi and Bluetooth.

7. The crankshaft measurement follower device according to claim 1, characterized in that: The mounting unit (1) comprises a base (11) and a magnetic base (12) arranged below the base (11), and two sets of screws (121) are arranged below the magnetic base.

8. The crankshaft measurement follower device according to claim 7, characterized in that: A low-position groove (111) is provided inside the mounting unit (1), and the contact component (31) is located inside the base (11). A high-position groove (114) having a height greater than the low-position groove (111) is also provided inside the base (11), and the driven component (32) and the reset component (33) are installed in the high-position groove (114).

9. The crankshaft measurement follower device according to claim 7, characterized in that: A limiting groove (112) is vertically provided on the base (11), and the vertical shaft (233) is inserted into the connecting ear (113). Connecting ears (113) are provided on both sides above the limiting groove (112), and the adapter component (23) is rotatably connected to the connecting ear (113).

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