Core Vibration Measurement Device

Abstract

The present invention discloses a core beating measurement device, which includes a roller, and further includes a rotary support mechanism that forms a tightening on the core after being fitted with the inner hole of the core; a first driving mechanism for driving the rotary support mechanism to rotate, the first driving mechanism being connected to the rotary support mechanism; a potentiometer measurement mechanism, the potentiometer measurement mechanism being connected to the roller, and the potentiometer measurement mechanism being located on one side of the rotary support mechanism; a second driving mechanism for driving the potentiometer measurement mechanism to move so that the roller is fitted with or separated from the core, and the potentiometer measurement mechanism is installed on the second driving mechanism. The present invention can detect a core having a groove on the outer circumferential surface.

Description

Technical Field

[0001] The invention relates to the technical field of motors, and in particular to a core runout measuring device. Background Art

[0002] The stator is an important part of the motor, and the beating of the stator core A is an important indicator, such as Figure 1 If the concentricity of the inner and outer circles of the core A is not good, it will cause problems in the motor assembly and affect the motor performance, and even cause friction between the motor rotor and the stator. Therefore, it is necessary to perform a runout test on the core A of the stator.

[0003] For some stator cores, weld A1 and groove A2 are formed on the outer circumference of the stator core. Since weld A1 and groove A2 are long, the traditional runout measurement device uses a small roller (thickness 4mm) to roll on the outer circle for measurement. However, since weld A1 and groove A2 on the outer circumference of core A are very deep and long, the roller of the traditional measurement device will fall into weld A1 or groove A2, and core A cannot be measured at all. Summary of the invention

[0004] The invention provides an iron core beat measuring device, which can detect an iron core with grooves on its outer circumferential surface.

[0005] The technical solution to achieve the above purpose is as follows:

[0006] A core runout measuring device, comprising a roller, further comprising:

[0007] After matching with the inner hole of the iron core, a rotating support mechanism is formed to tighten the iron core;

[0008] A first driving mechanism for driving the rotating support mechanism to rotate, the first driving mechanism being connected to the rotating support mechanism;

[0009] A potentiometer measuring mechanism, the potentiometer measuring mechanism is connected to the roller, and the potentiometer measuring mechanism is located on one side of the rotating support mechanism;

[0010] The second driving mechanism drives the potentiometer measuring mechanism to move so that the roller is engaged with or separated from the iron core, and the potentiometer measuring mechanism is mounted on the second driving mechanism.

[0011] Furthermore, it also includes:

[0012] Workbench;

[0013] A lifting and limiting mechanism is used to limit the iron core tightened on the rotating support mechanism. The lifting and limiting mechanism is located on one side of the rotating support mechanism and is connected to the workbench.

[0014] Furthermore, the lifting and limiting mechanism includes:

[0015] Lifting drive

[0016] First guide tube, which is connected to the workbench

[0017] First guide rod, which is in clearance fit with the first guide tube

[0018] First limiting plate for limiting the iron core, which is connected to the first guide rod and also connected to the lifting drive

[0019] Further, the rotary support mechanism includes: first support

[0020] Hollow rotating shaft, one end of which is rotatably assembled on the first support, and at least a part of the peripheral surface of the other end of the hollow rotating shaft is a conical surface

[0021] Expansion sleeve, which is sleeved on the hollow rotating shaft and is in fit with the conical surface of the hollow rotating shaft

[0022] Gland for driving the expansion sleeve to move, which is in fit with the expansion sleeve

[0023] Pull rod, which passes through the rotating shaft, and one end of the pull rod is connected to the gland

[0024] Rotary connecting seat, the other end of the pull rod is connected to the rotary connecting seat

[0025] First linear drive for driving the rotary connecting seat to make the pull rod move linearly, which is connected to the rotary connecting seat

[0026] Further, at least a part of the peripheral surface of the gland is a conical surface, and the expansion sleeve is sleeved on the gland and is in fit with the conical surface of the hollow rotating shaft

[0027] Further, the first opening grooves and the second opening grooves are alternately arranged on the peripheral surface of the expansion sleeve, the notch of the first opening groove is located on the axial end surface at one end of the expansion sleeve, and the notch of the second opening groove is located on the axial end surface at the other end of the expansion sleeve

[0028] Further, the inner hole of the expansion sleeve is composed of a circular hole in the middle and conical holes at both ends, one of the conical holes is in fit with the conical surface of the hollow rotating shaft, and the other conical hole is in fit with the gland

[0029] Further, the first drive mechanism includes:

[0030] First bracket

[0031] First motor, which is connected to the first bracket

[0032] First transmission mechanism, which is respectively connected to the first motor and the rotary support mechanism

[0033] Further, the potentiometer measuring mechanism includes:

[0034] A roller frame for mounting the rollers;

[0035] A second guide rod, which is connected to the roller frame;

[0036] A spring, which is sleeved on the second guide rod, and one end of the spring abuts against the roller frame;

[0037] A spring seat, and the other end of the spring is connected to the spring seat;

[0038] A potentiometer, the second guide rod passes through the spring seat and is connected to the potentiometer.

[0039] Further, the second driving mechanism includes:

[0040] A bottom plate;

[0041] A second linear driver;

[0042] A moving seat for supporting the potentiometer measuring mechanism, and the moving seat is connected to the second linear driver;

[0043] A guide rail, which is mounted on the bottom plate, and the moving seat is slidably matched with the guide rail.

[0044] After the roller is engaged with the circumferential surface of the iron core, due to the inconsistent accuracy of each part or point on the surface of the iron core, when the iron core rotates, it will inevitably cause the roller to jump. When the iron core rotates one week, the potentiometer measuring mechanism measures the change in the outer diameter dimension. However, in many prior arts, there are positioning grooves or weld seams on the outer circle of the stator iron core. Therefore, the dimension change measured by the potentiometer is not a true reflection of the jump. In the present invention, the data collected by the potentiometer measuring mechanism is analyzed through programming (where there are grooves on the outer circle of the iron core, the measured value is abrupt; while when the iron core is not round, that is, it becomes an ellipse, the measured data is continuous), and the abnormal data is eliminated, and only the valid data is analyzed, so as to judge whether the jump of the stator iron core is qualified.

[0045] The beneficial effect of the present invention is that the traditional method cannot measure the jump of the iron core with grooves on the outer circle, and the present invention can quickly and accurately measure its jump. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 It is a schematic diagram of the iron core;

[0047] Figure 2 It is a perspective view of the iron core jump measuring device;

[0048] Figure 3 It is a rear view of the iron core jump measuring device;

[0049] Figure 4 It is along Figure 3 The cross-sectional view taken along line B-B in

[0050] Figure 5 The enlarged view of part P in Figure 4 ;

[0051] Figure 6 The schematic diagram of the expansion sleeve.

[0052] Markings in the attached drawings:

[0053] Iron core A, weld seam A1, groove A2, workbench 1, mounting hole 1a, roller 2, first support 3, hollow rotating shaft 4, conical surface 4a, first limiting step 4b, sliding bearing 4c, expansion sleeve 5, first opening groove 5a, second opening groove 5b, gland 6, conical surface 6a, second limiting step 6b, pull rod 7, rotary connection seat 8, first linear driver 9, first support 10, first motor 11, first transmission mechanism 12, roller frame 13, second guide rod 14, spring 15, potentiometer 16, connection seat 17, limiting seat 18, bottom plate 19, second linear driver 20, moving seat 21, guide rail 22, lifting driver 23, first guide tube 24, first guide rod 25, first limiting plate 26. Specific embodiments

[0054] The following will be combined with Figures 1 to 6 to describe the present invention.

[0055] The iron core runout measuring device of the present invention includes a workbench 1, a roller 2, a rotary support mechanism, a first driving mechanism, a potentiometer measuring mechanism, and a second driving mechanism. The following will respectively describe each part and their relationships in detail:

[0056] The rotary support mechanism is installed on the workbench 1. After the rotary support mechanism is fitted with the inner hole of the iron core A, it forms a tension on the iron core A. On the one hand, the rotary support mechanism provides a supporting effect on the iron core A. On the other hand, when the iron core A receives a circumferential acting force provided by the first driving mechanism, the iron core A can follow the rotary support mechanism to perform a rotary motion, so as to drive the roller 2 fitted with the outer circumferential surface of the iron core A to form a runout.

[0057] In this embodiment, the rotary support mechanism includes a first support 3, a hollow rotating shaft 4, an expansion sleeve 5, a gland 6, a pull rod 7, a rotary connection seat 8, and a first linear driver 9. The first support 3 is a bearing seat. The first support 3 is fixed to the workbench 1. Preferably, one end of the first support 3 is fixed to the lower surface of the workbench 1, and the other end of the first support 3 extends downward from the workbench 1.

[0058] One end of the hollow rotating shaft 4 is rotatably assembled on the first support 3. At least a part of the circumferential surface at the other end of the hollow rotating shaft 4 is a conical surface 4a. A first limiting step 4b is formed between a part of the circumferential surface of the hollow rotating shaft 4 and another part. The other part of the circumferential surface of the hollow rotating shaft 4 is preferably set as a cylindrical surface. The first limiting step 4b is formed between the conical surface 4a and the cylindrical surface of the hollow rotating shaft 4. The first limiting step 4b is used to limit the moving stroke of the expansion sleeve 5. A sliding bearing 4c is installed in the inner hole of the hollow rotating shaft 4. The expansion sleeve 5 passes through the sliding bearing 4c and is in clearance fit with the sliding bearing 4c.

[0059] The expansion sleeve 5 is sleeved on the hollow rotating shaft 4 and is in cooperation with the conical surface 4a of the hollow rotating shaft 4. First opening grooves 5a and second opening grooves 5b are alternately arranged on the circumferential surface of the expansion sleeve 5. The notch of the first opening groove 5a is located on the axial end surface at one end of the expansion sleeve 5, and the notch of the second opening groove 5b is located on the axial end surface at the other end of the expansion sleeve 5. The first opening grooves 5a and the second opening grooves 5b are evenly distributed axially with respect to the expansion sleeve 5. The lengths of the first opening grooves 5a and the second opening grooves 5b are both greater than half of the length of the expansion sleeve 5. The first opening grooves 5a and the second opening grooves 5b are both composed of a rectangular groove and an arc groove. The arc groove is located at the root of the first opening groove 5a or the second opening groove 5b. When the expansion sleeve 5 is subjected to a radial acting force from the hollow rotating shaft 4 and / or the gland 6, the arc groove can not only make the expansion sleeve 5 better expanded, but also avoid cracks on the expansion sleeve 5.

[0060] The gland 6 drives the expansion sleeve 5 to move. The gland 6 is in cooperation with the expansion sleeve 5. At least a part of the circumferential surface of the gland 6 is a conical surface 6a. The expansion sleeve 5 is sleeved on the gland 6 and is in cooperation with the conical surface 4a of the hollow rotating shaft 4. In this embodiment, a part of the circumferential surface of the gland 6 is a conical surface 6a. A second limiting step 6b is formed between a part of the circumferential surface of the gland 6 and another part of the circumferential surface. The second limiting step 6b is used to limit the moving stroke of the expansion sleeve 5. The inner hole of the expansion sleeve 5 is composed of a circular hole in the middle and conical holes at both ends. One of the conical holes is in cooperation with the conical surface 4a on the hollow rotating shaft 4, and the other conical hole is in cooperation with the conical surface 6a on the gland 6.

[0061] The pull rod 7 passes through the rotating shaft 4. One end of the pull rod 7 is connected to the gland 6, and the other end of the pull rod 7 is connected to the rotary connection seat 8. The rotary connection seat 8 is a bearing seat equipped with a bearing. The first linear actuator 9 is connected to the rotary connection seat 8. The first linear actuator 9 preferably adopts a cylinder. The pull rod 7 is connected to the bearing in the rotary connection seat 8, so that the pull rod 7 can rotate relative to the first linear actuator 9.

[0062] The tensioning process of the rotating support mechanism on the iron core A is as follows: The iron core A is sleeved on the hollow rotating shaft 4, the expanding sleeve 5, and the gland 6. The piston rod of the first linear driver 9 retracts to drive the pull rod 7 to move axially. The pull rod 7 drives the gland 6 to move towards the hollow rotating shaft 4. The gland 6 drives the expanding sleeve 5 to move axially along the hollow rotating shaft 4. Under the action of the conical surface 4a on the hollow rotating shaft 4 and the conical surface 6a on the gland 6, the expanding sleeve 5 moves radially along the hollow rotating shaft 4. At the same time, since the expanding sleeve 5 is provided with a plurality of first opening grooves 5a and second opening grooves 5b, the expanding sleeve 5 is expanded. The expanded expanding sleeve 5 generates a tensioning force on the iron core A, so that the iron core A is tensioned on the rotating support mechanism, and the iron core A and the rotating support mechanism are fastened into one body.

[0063] The first driving mechanism drives the rotating support mechanism to rotate. The first driving mechanism is connected to the rotating support mechanism. The first driving mechanism includes a first bracket 10, a first motor 11, and a first transmission mechanism 12. The first motor 11 is connected to the first bracket 10. The first transmission mechanism 12 is respectively connected to the first motor 11 and the rotating support mechanism.

[0064] In this embodiment, the workbench 1 is provided with a mounting hole 1a. The first bracket 10 corresponds to the mounting hole 1a. Screws are used to pass through the mounting hole 1a and connect to the first bracket 10, so that the first bracket 10 and the workbench 1 are fastened into one body. The mounting hole 1a is a strip-shaped hole, which is convenient for adjusting the distance between the first bracket 10 and the rotating support mechanism. The first transmission mechanism 12 is connected to the rotating shaft 4 in the rotating support mechanism. The first transmission mechanism 12 preferably adopts a belt transmission mechanism. Since the belt transmission mechanism is prone to looseness after a long time of use, therefore, the distance between the first bracket 10 and the rotating support mechanism is adjusted, so as to facilitate the tensioning of the belt transmission mechanism and maintain the transmission efficiency.

[0065] The potentiometer measuring mechanism is connected to the roller 2. The potentiometer measuring mechanism is located on one side of the rotating support mechanism. The potentiometer measuring mechanism includes a roller frame 13, a second guide rod 14, a spring 15, a spring seat, and a potentiometer 16. The roller 2 is installed on the roller frame 13. The second guide rod 14 cooperates with the roller frame 13. The spring 15 is sleeved on the second guide rod 14. One end of the spring 15 abuts against the roller frame 13, and the other end of the spring 15 is connected to the spring seat. The second guide rod 14 passes through the spring seat and is connected to the potentiometer 16.

[0066] The roller stand 13 is provided with assembly holes, and the second guide rod 14 passes through the assembly holes. A limiting portion is provided on the second guide rod 14, and this limiting portion is used to limit the separation of the roller stand 13 from the second guide rod 14 under the action of the spring 15. The spring seat includes a connecting seat 17 and a limiting seat 18. The connecting seat 17 is L-shaped, and the connecting seat 17 is provided with mounting holes for cooperating with the spring 15. The limiting seat 18 is fixed to the connecting seat 17. The spring 15 passes through the mounting holes on the connecting seat 17 and abuts against the limiting seat 18. A conduit is provided on the limiting seat 18, and the second guide rod 14 passes through the mounting holes on the connecting seat 17 and has a clearance fit with the conduit on the limiting seat 18. The conduit on the limiting seat 18 guides the second guide rod 14.

[0067] After the roller 2 is fitted with the circumferential surface of the iron core A, due to the inconsistent accuracy of each part or point on the surface of the iron core A, when the iron core A rotates, it will inevitably cause the roller 2 to jump. Under the action of the spring 15, during the measurement process, the roller 2 and the iron core A always maintain a mating relationship. When the roller 2 jumps, it pushes the second guide rod 14 to move, and further the second guide rod 14 pushes the potentiometer 16 to work, and the potentiometer 16 records and / or outputs measurement data.

[0068] The second driving mechanism drives the potentiometer measuring mechanism to move so that the roller 2 and the iron core A are mated or separated. The potentiometer measuring mechanism is mounted on the second driving mechanism. The second driving mechanism includes a bottom plate 19, a second linear driver 20, a moving seat 21, and a guide rail 22. The moving seat 21 is used to support the potentiometer measuring mechanism, that is, the potentiometer measuring mechanism is fixed on the moving seat 21. The moving seat 21 is connected to the second linear driver 20, and the guide rail 22 is mounted on the bottom plate 19. The moving seat 21 is in sliding fit with the guide rail 22.

[0069] The second linear driver 20 preferably adopts a cylinder. When the second linear driver 20 works, when it is necessary to measure the iron core A, the second linear driver 20 pushes the moving seat 21 to move along the guide rail 22 towards the iron core A, so that the roller 2 mounted on the potentiometer measuring mechanism forms a fit with the iron core A. After the measurement is completed, the second linear driver 20 pulls the moving seat 21 to move away from the iron core A along the guide rail 22, so that the roller 2 mounted on the potentiometer measuring mechanism is separated from the iron core A.

[0070] Since the iron core A is sleeved on the hollow rotating shaft 4, the expansion sleeve 5, and the gland 6, when the pull rod 7 moves to drive the gland 6 to move the expansion sleeve 5, the expansion sleeve 5 moves axially along the hollow rotating shaft 4. When the expansion sleeve 5 comes into contact with the iron core A, as the expansion sleeve 5 continues to move axially along the hollow rotating shaft 4, due to the frictional force generated after the expansion sleeve 5 contacts the iron core A, it will cause the iron core A to move axially following the expansion sleeve 5, which may cause the expansion sleeve 5 to fail to tighten the iron core A. Therefore, the present invention further includes a lifting and limiting mechanism for limiting the iron core A tightened on the rotary support mechanism. The lifting and limiting mechanism is located on one side of the rotary support mechanism and is connected to the workbench 1. By the limiting effect formed by the lifting and limiting mechanism on the end face of the iron core A, axial movement of the iron core A during the tightening process can be avoided.

[0071] In this embodiment, the preferred structure of the lifting and limiting mechanism is as follows: it includes a lifting drive 23, a first guide tube 24, a first guide rod 25, and a first limiting plate 26 for limiting the iron core A. The lifting drive 23 is fixed on the workbench 1, the first guide tube 24 is connected to the workbench 1, the first guide rod 25 is in clearance fit with the first guide tube 24, the first limiting plate 26 is connected to the first guide rod 25, and the first limiting plate 26 is also connected to the lifting drive 23. The lifting drive 23 preferably adopts a cylinder, the piston rod of the cylinder is connected to the first limiting plate 26, and the end face of the first limiting plate 26 facing the rotary support mechanism is preferably set as an arc surface to facilitate cooperation with the rotary support mechanism.

[0072] When it is necessary for the lifting and limiting mechanism to limit the iron core A, the lifting drive 23 works to drive the first limiting plate 26 to descend. After the first limiting plate 26 descends to the required position, the iron core A is sleeved on the rotary support mechanism, and then the rotary support mechanism tightens the iron core A. During the tightening process of the iron core A, due to the limiting effect of the first limiting plate 26, axial movement will not occur.

[0073] The measurement method using the above iron core runout measuring device is as follows:

[0074] S1, the lifting and limiting mechanism descends to limit the position of the iron core A, so that the iron core A is sleeved on the rotary support mechanism, and the rotary support mechanism generates a tightening force on the iron core A, making the iron core A and the rotary support mechanism fastened together.

[0075] S2, the potentiometer measuring mechanism drives the roller 2 to move towards the iron core A, so that the roller 2 forms a fit with the circumferential surface of the iron core A, and the roller 2 is pressed tightly against the iron core A by the acting force of the spring 15 in the potentiometer measuring mechanism;

[0076] S3. The first driving mechanism operates, driving the rotary support mechanism to rotate, thereby rotating the iron core A. The potentiometer measuring mechanism measures the iron core A. Since the precision of each part or point on the surface of the iron core A is inconsistent, when the iron core A rotates, it will inevitably cause the roller 2 to jump. Under the action of the spring 15, the roller 2 is always kept in a mating relationship with the iron core A during the measurement process. When the roller 2 jumps, it pushes the second guide rod 14 to move, and then the second guide rod 14 pushes the potentiometer 16 to work, and the potentiometer 16 records the radial change data.

[0077] S4. The potentiometer measuring mechanism provides the recorded data to an industrial control computer (not shown in the figure). The industrial control computer analyzes the collected data. (At the places where there are grooves on the outer circle of the iron core, the measured values are mutated; while when the iron core is actually non-circular, that is, elliptical, the measured data is continuous.) The abnormal data is eliminated, and only the valid data is analyzed to determine whether the stator iron core jump is qualified.

[0078] Finally, it should be noted that the above embodiments are only relatively preferred embodiments of the present invention to illustrate the technical solutions of the present invention, rather than limiting it, let alone limiting the patent scope of the present invention; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention; in addition, directly or indirectly applying the technical solutions of the present invention to other related technical fields is equally included in the patent protection scope of the present invention.

Claims

1. Core runout measuring device, including roller, It is characterized in that Also includes: After matching with the inner hole of the iron core, a rotating support mechanism is formed to tighten the iron core; A first driving mechanism for driving the rotating support mechanism to rotate, the first driving mechanism being connected to the rotating support mechanism; The rotary support mechanism comprises: a first support; A hollow rotating shaft, one end of which is rotatably mounted on the first support, and at least a portion of the circumference of the other end of the hollow rotating shaft is a conical surface; An expansion sleeve, which is sleeved on the hollow shaft and matches with the conical surface of the hollow shaft; The first opening groove and the second opening groove are alternately arranged on the circumferential surface of the expansion sleeve, the notch of the first opening groove is located on the axial end surface of one end of the expansion sleeve, and the notch of the second opening groove is located on the axial end surface of the other end of the expansion sleeve; the first opening groove and the second opening groove are both arranged parallel to the axial direction of the expansion sleeve, the lengths of the first opening groove and the second opening groove are both greater than half of the length of the expansion sleeve, the first opening groove and the second opening groove are both composed of a rectangular groove and an arc groove, and the arc groove is located at the root of the first opening groove or the second opening groove; A potentiometer measuring mechanism, the potentiometer measuring mechanism is connected to the roller, and the potentiometer measuring mechanism is located on one side of the rotating support mechanism; The second driving mechanism drives the potentiometer measuring mechanism to move so that the roller is engaged with or separated from the iron core, and the potentiometer measuring mechanism is mounted on the second driving mechanism.

2. The core runout measuring device according to claim 1, It is characterized in that Also includes: Workbench; A lifting and limiting mechanism is used to limit the iron core tightened on the rotating support mechanism. The lifting and limiting mechanism is located on one side of the rotating support mechanism and is connected to the workbench.

3. The core runout measuring device according to claim 2, It is characterized in that The lifting limit mechanism includes: Lifting drive; A first guide tube, the first guide tube is connected to the workbench; A first guide rod, the first guide rod and the first guide tube are in clearance fit; A first limiting plate for limiting the iron core, the first limiting plate is connected to the first guide rod, and the first limiting plate is also connected to the lifting drive.

4. The core runout measuring device according to any one of claims 1 to 3, It is characterized in that A gland that drives the expansion sleeve to move, and the gland cooperates with the expansion sleeve; A pull rod, the pull rod passes through the rotating shaft, and one end of the pull rod is connected to the gland; A swivel connection seat, the other end of the pull rod is connected to the swivel connection seat; A first linear driver drives the rotary connection seat to make the pull rod move linearly, and the first linear driver is connected to the rotary connection seat.

5. The core runout measuring device according to claim 4, It is characterized in that At least a part of the peripheral surface of the gland is a conical surface, and the expansion sleeve is sleeved on the gland and matched with the conical surface of the hollow rotating shaft.

6. The core runout measuring device according to claim 4, It is characterized in that The inner hole of the expansion sleeve is composed of a round hole in the middle and tapered holes at both ends, one of the tapered holes cooperates with the tapered surface of the hollow shaft, and the other tapered hole cooperates with the pressure cover.

7. The core runout measuring device according to any one of claims 1 to 3, It is characterized in that The first driving mechanism comprises: First bracket; A first motor, the first motor is connected to the first bracket; The first transmission mechanism is connected to the first motor and the rotation support mechanism respectively.

8. The iron core jump measurement device according to any one of claims 1 to 3, characterized in that, the potentiometer measurement mechanism comprises: a roller frame for mounting the roller; a second guide rod, which is matched with the roller frame; a spring sleeved on the second guide rod, one end of the spring abuts against the roller frame; a spring seat, the other end of the spring is matched with the spring seat; a potentiometer, the second guide rod passes through the spring seat and is connected to the potentiometer.

9. The iron core jump measurement device according to any one of claims 1 to 3, characterized in that, the second driving mechanism comprises: a bottom plate; a second linear driver; a moving seat for supporting the potentiometer measurement mechanism, the moving seat is connected to the second linear driver; a guide rail, the guide rail is mounted on the bottom plate, and the moving seat is slidably matched with the guide rail.

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