CN118687509A - A motor shaft inner hole coaxiality detection device - Google Patents

Abstract

The invention belongs to the technical field of high-precision detection, and discloses a motor shaft inner hole coaxiality detection device which comprises a base, wherein supporting seats are symmetrically and fixedly arranged on the left side and the right side of the upper surface of the base, a driving mechanism is arranged on the front side of the upper surface of the base, supporting sleeves are fixedly sleeved on the upper parts of the two supporting seats, symmetrical clamping mechanisms are arranged at the inner ends of the two supporting sleeves, a chuck is arranged on the right side clamping mechanism, and the chuck is fixedly arranged at the left end of the right side supporting sleeve. The gear sleeve is driven to rotate at a high speed by starting the driving mechanism, the inner inclined surface of the gear sleeve rotates at a high speed along the clamping block to the end far away from the supporting sleeve, so that the clamping block quickly passes through a high abrasion zone of the taper sleeve, the minimum abrasion zone of the taper sleeve replaces the maximum abrasion zone of the taper sleeve, and the error generated by abrasion of the contact part of the clamping block and the taper sleeve is eliminated, thereby solving the problems that the detection precision is reduced and the optical detection lens needs to be repositioned due to the reduction of the precision of the clamp of the existing detection device.

Description

A motor shaft inner hole coaxiality detection device

Technical Field

The invention belongs to the technical field of high-precision detection, and in particular relates to a motor shaft inner hole coaxiality detection device.

Background Art

The motor shaft is the output part of the motor power. Holes are usually required on the motor shaft to connect the motor to the connector and transmit power. The holes on the motor shaft usually need to be tested for coaxiality to prevent the inner hole size on the motor shaft from exceeding the tolerance, causing the motor shaft to be unbalanced when it rotates, resulting in vibration, noise, etc., and causing wear on the motor shaft.

In the prior art, when the coaxiality of the inner hole of the motor shaft is detected, the motor shaft is first placed on a fixture, and then the optical detection lens is extended into the inner hole of the motor shaft along the axis of the motor shaft, and the coaxiality of the inner hole of the motor shaft is detected by optical reflection. When the fixture clamps the motor shaft, the various components of the fixture move and rub against each other when the fixture clamps the motor shaft, and the clamping parts are easily worn, which leads to reduced accuracy of the fixture, causing the clamped motor shaft to deviate from the center of the fixture, causing the axis of the optical detection lens to deviate from the axis of the motor shaft, resulting in the problem of the optical detection lens needing to reposition the motor axis. At this time, not only will the preparation time for the motor shaft detection be too long, but the error caused by the repositioning of the optical detection lens will also cause reduced detection accuracy.

Summary of the invention

The purpose of the present invention is to provide a motor shaft inner hole coaxiality detection device to solve the problems raised in the above background technology.

In order to achieve the above-mentioned purpose, the present invention provides the following technical scheme: a motor shaft inner hole coaxiality detection device, comprising a base, support seats are symmetrically fixedly installed on the left and right sides of the upper surface of the base, a driving mechanism is provided on the front side of the upper surface of the base, the upper parts of the two support seats are fixedly sleeved with support sleeves, and the inner ends of the two support sleeves are provided with symmetrical clamping mechanisms, the clamping mechanism on the right side comprises a chuck, the chuck is fixedly installed on the left end of the right support sleeve, a plurality of first sliding grooves are equidistantly provided on the circumference of the left side surface of the chuck, a stop block is fixedly installed on the side of the first sliding groove away from the support sleeve, a first elastic member is fixedly installed on the side of the stop block close to the support sleeve, a first sliding block is fixedly installed on the side of the first elastic member close to the support sleeve, the first sliding block is slidably sleeved with the first sliding groove, a clamping block is fixedly installed on the left side of the first sliding block, a plurality of second sliding grooves are equidistantly provided on the curved surface circumference of the chuck, a positioning mechanism is provided between the support sleeve and the clamping mechanism, and a homogeneous mechanism is provided on the right side of the clamping mechanism.

Preferably, the driving mechanism includes two movable seats, and the two movable seats are fixedly installed in front of the support seat on the same side. A driving member is fixedly installed on the front side of the middle part of the upper surface of the base, and a driving shaft is fixedly sleeved in the middle part of the output shaft of the driving member. The driving shaft is movably sleeved with the movable seats on the left and right sides, and driving wheels are symmetrically fixedly sleeved on the left and right sides of the curved surface of the driving shaft.

Preferably, the positioning mechanism on the right side includes multiple second sliding blocks, and the multiple second sliding blocks are respectively slidably sleeved with multiple second sliding grooves, the right side of the outer curved surface of the multiple second sliding blocks is fixedly sleeved with a limiting ring, the limiting ring is movably sleeved with a cone sleeve, the inner curved surface of the cone sleeve is slidably sleeved with the outer curved surface of the second sliding block, the middle part of the outer curved surface of the cone sleeve is fixedly sleeved with a gear sleeve, the gear sleeve is meshed with the driving wheel on the same side, the right ends of the multiple second sliding blocks are fixedly installed with a side shell, the side shell is slidably sleeved with the support sleeve, the left side of the inner cavity of the side shell is fixedly installed with a second elastic member, the left end of the second elastic member is fixedly connected to the right side surface of the adjacent chuck, the left side surface of the inner side of the side shell is fixedly installed with a magnetic ring, and the right side surface of the chuck on the right side is fixedly installed with an electromagnetic ring.

Preferably, the isotropic mechanism on the right side includes multiple first support rods, multiple first support rods are respectively fixed to the middle part of the left side surface of adjacent clamping blocks, multiple first support rods are fixedly installed with second support rods on the outer side surfaces, multiple second support rods are fixedly installed with first middle rods on the right side surfaces, the length of the first middle rod on the front upper side is greater than the length of the first middle rod on the bottom, the length of the first middle rod on the bottom is greater than the length of the first middle rod on the rear upper side, multiple first middle rods are fixedly installed with cross rods on the inner sides, the right side surface of the cross rod on the left side is in sliding contact with the left side surface of the cross rod in the middle, the right side surface of the cross rod in the middle is in sliding contact with the left side surface of the cross rod on the right side, multiple right sides of the cross rods are provided with clamping grooves, multiple first middle rods are at the same distance from the axis of the support sleeve, and the middle parts of multiple clamping grooves are clamped with axial rods.

Preferably, a gap is left between the right side surface of the clamping block and the left side surface of the chuck, and a curved surface is provided on a side of the clamping block close to the supporting sleeve.

Preferably, the driving member adopts a high-speed motor, and the length of the driving wheel is greater than the left-right displacement length of the cone sleeve driving the gear sleeve.

Preferably, the cone sleeve is made of wear-resistant material, the elastic force of the second elastic member is greater than the sum of the elastic forces of the plurality of first elastic members, and when the electromagnetic ring is energized, the magnetic poles of the magnetic ring and the adjacent electromagnetic ring are in opposite directions.

The beneficial effects of the present invention are as follows:

The present invention starts a driving mechanism to drive the gear sleeve to rotate at high speed. The inner inclined surface of the high-speed rotating gear sleeve slides at high speed along the end of the clamping block away from the support sleeve, thereby overcoming the problem that when the number of left and right movements of the existing non-rotating cone sleeve increases, the wear resistance of different positions of the cone sleeve and the elastic force of different first elastic parts cannot be completely and evenly distributed, resulting in deviations, resulting in different degrees of wear of the part where the cone sleeve contacts the clamping block, resulting in the cone sleeve pushing the clamping block to clamp the motor shaft in the direction of the support sleeve. The motor shaft is offset to the side of the cone sleeve with a higher degree of wear, resulting in the subsequent optical detection lens axis and the motor shaft inner hole axis offset, resulting in the need to re-position the optical detection lens, and will continuously increase the preparation time for the motor shaft detection stage. In addition, the error caused by the re-positioning of the optical detection lens will also reduce the detection accuracy.

In addition, by setting up a high-speed rotating cone sleeve, the clamping block can quickly pass over the high-wear area of the cone sleeve, so that the smallest wear area of the cone sleeve can replace the largest wear area of the cone sleeve, eliminating the error caused by the wear of the contact part between the clamping block and the cone sleeve, and overcoming the problem of reduced detection accuracy and re-positioning of the optical detection lens caused by the uneven friction of the cone sleeve.

3. When the present invention is used, when the friction degree of the clamping block on one side is greater than that of the clamping block on the other side, the clamping block at the other end pushes the clamping block on the side with greater axial friction degree of the clamped motor to move. At this time, the clamping block drives the cross rod and the clamping groove to move toward the side with greater wear degree through the first support rod, the second support rod and the first middle rod. At this time, the cross hole formed by the multiple clamping grooves moves toward the side with greater wear degree, and the cross rod pushes the axis rod to move toward the side with greater friction degree through the clamping groove, so that the axis center of the axis rod always coincides with the axis of the inner hole of the motor shaft, thereby realizing the guided positioning of the optical detection lens, thereby further overcoming the problem that the clamping block with greater axial wear degree of the motor clamped by the existing clamping mechanism moves to one side, causing the axis of the clamped motor shaft to deviate from the central axis of the support sleeve, resulting in the optical detection lens at the axis of the support sleeve being offset from the center of the motor shaft, resulting in reduced detection accuracy and the need to reposition the optical detection lens.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of the overall appearance structure of the present invention;

FIG2 is a schematic diagram of the structure of the positioning mechanism of the present invention;

FIG3 is a schematic diagram of the support sleeve structure of the present invention;

FIG4 is a schematic diagram of the structure of the same position mechanism of the present invention;

FIG. 5 is a schematic diagram of the structure of the clamping mechanism of the present invention.

In the figure: 1, base; 2, support seat; 3, driving mechanism; 301, movable seat; 302, driving member; 303, driving shaft; 304, driving wheel; 4, support sleeve; 5, clamping mechanism; 501, chuck; 502, first sliding groove; 503, block; 504, first elastic member; 505, first sliding block; 506, clamping block; 507, second sliding groove; 6, positioning mechanism; 601, second sliding block; 602, limiting ring; 603, cone sleeve; 604, gear sleeve; 605, side shell; 606, second elastic member; 607, magnetic ring; 608, electromagnetic ring; 7, same position mechanism; 701, first support rod; 702, second support rod; 703, first middle rod; 704, cross rod; 705, clamping groove; 706, axis rod.

DETAILED DESCRIPTION

The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

As shown in Figures 1 to 5, an embodiment of the present invention provides a motor shaft inner hole coaxiality detection device, including a base 1, support seats 2 are symmetrically fixedly installed on the left and right sides of the upper surface of the base 1, a driving mechanism 3 is provided on the front side of the upper surface of the base 1, the upper parts of the two support seats 2 are fixedly sleeved with support sleeves 4, the inner ends of the two support sleeves 4 are provided with symmetrical clamping mechanisms 5, the right clamping mechanism 5 includes a chuck 501, the chuck 501 is fixedly installed on the left end of the right support sleeve 4, a plurality of first sliding grooves 502 are equidistantly provided on the left side of the chuck 501, a stop block 503 is fixedly installed on the side of the first sliding groove 502 away from the support sleeve 4, a first elastic member 504 is fixedly installed on the side of the stop block 503 close to the support sleeve 4, a first sliding block 505 is fixedly installed on the side of the first elastic member 504 close to the support sleeve 4, the first sliding block 505 is slidably sleeved with the first sliding groove 502, a clamping block 506 is fixedly installed on the left side of the first sliding block 505, There is a gap between the right side surface and the left side surface of the chuck 501, so as to prevent the first elastic member 504 from pushing the first sliding block 505 to drive the clamping block 506 to move toward the support sleeve 4 or away from the support sleeve 4, and the right side surface of the clamping block 506 and the left side surface of the chuck 501 will rub against each other, causing the chuck 501 and the clamping block 506 to wear and reduce their service life. At the same time, it is prevented that the friction between the clamping block 506 and the chuck 501 increases and the clamping block 506 is deformed, resulting in a reduction in the clamping accuracy of the clamping block 506 and the clamping block 506. A curved surface is provided on the side of 506 close to the support sleeve 4, so as to increase the contact area between the clamp block 506 and the motor shaft when the clamp block 506 clamps the motor shaft, improve the stability of the clamp block 506 clamping the motor shaft, and reduce the contact pressure per unit area between the clamp block 506 and the motor shaft to avoid damage to the surface of the motor shaft. A plurality of second sliding grooves 507 are equidistantly provided on the circumference of the curved surface of the chuck 501, a positioning mechanism 6 is provided between the support sleeve 4 and the clamping mechanism 5, and a positioning mechanism 7 is provided on the right side of the clamping mechanism 5.

As shown in Figure 1, the driving mechanism 3 includes two movable seats 301, and the two movable seats 301 are fixedly installed in front of the support seat 2 on the same side. A driving member 302 is fixedly installed on the front side of the middle part of the upper surface of the base 1, and a driving shaft 303 is fixedly sleeved in the middle part of the output shaft of the driving member 302. The driving member 302 adopts a high-speed motor, thereby increasing the rotation speed of the cone sleeve 603, so that the clamping block 506 can quickly pass over the inner inclined surface of the cone sleeve 603, improve the stability of the clamping block 506 clamping the motor shaft, and improve the clamping accuracy. The driving shaft 303 is movably sleeved with the movable seats 301 on the left and right sides, and the left and right sides of the curved surface of the driving shaft 303 are symmetrically fixedly sleeved with driving wheels 304. The length of the driving wheel 304 is greater than the left and right displacement length of the cone sleeve 603 driving the gear sleeve 604, so that when the cone sleeve 603 drives the gear sleeve 604 to move left and right, the gear sleeve 604 is always engaged with the driving wheel 304.

As shown in Figures 1 to 3, the right positioning mechanism 6 includes a plurality of second sliding blocks 601, and the plurality of second sliding blocks 601 are respectively slidably sleeved with the plurality of second sliding grooves 507. The right side of the outer curved surface of the plurality of second sliding blocks 601 is fixedly sleeved with a limiting ring 602, and the limiting ring 602 is movably sleeved with a cone sleeve 603. The inner curved surface of the cone sleeve 603 is slidably sleeved with the outer curved surface of the second sliding block 601. The cone sleeve 603 is made of wear-resistant material and made of high carbon steel, thereby reducing the cone sleeve 603 and the clamping block 5 06, to improve the effective service life of the cone sleeve 603, the middle part of the outer curved surface of the cone sleeve 603 is fixedly sleeved with a gear sleeve 604, the gear sleeve 604 is meshed with the driving wheel 304 on the same side, the right end of the plurality of second sliding blocks 601 is fixedly installed with a side shell 605, the side shell 605 is slidably sleeved with the support sleeve 4, and the left side of the inner cavity of the side shell 605 is fixedly installed with a second elastic member 606, the elastic force of the second elastic member 606 is greater than the sum of the elastic forces of the plurality of first elastic members 504, thereby realizing the electromagnetic ring 608 When the power is off, the second elastic member 606 is restored, and the second elastic member 606 can overcome the resistance of the plurality of first elastic members 504, so that the second elastic member 606 pulls the plurality of first elastic members 504 to extend through the side shell 605, the second sliding block 601, the clamping block 506 and the first sliding block 505, so that the clamping block 506 clamps the motor shaft. The left end of the second elastic member 606 is fixedly connected to the right side surface of the adjacent clamping disk 501, and the left side surface of the inner side of the side shell 605 is fixedly installed with a magnetic ring 607. An electromagnetic ring 608 is fixedly installed on the right side of 01. When the electromagnetic ring 608 is energized, the magnetic poles of the magnetic ring 607 and the adjacent electromagnetic ring 608 are opposite, so that when the electromagnetic ring 608 is energized, the electromagnetic ring 608 pushes the magnetic ring 607 to move away from the clamping mechanism 5, so that the cone sleeve 603 moves away from the support sleeve 4, and then the first elastic member 504 pulls the clamping block 506 to move away from the support sleeve 4 through the first sliding block 505, so as to facilitate the subsequent clamping block 506 to clamp the motor shaft.

As shown in Figures 1 and 4, the right-side homologous mechanism 7 includes a plurality of first support rods 701, and the plurality of first support rods 701 are respectively fixed to the middle part of the left side of the adjacent clamping block 506, and the outer side surfaces of the plurality of first support rods 701 are fixedly installed with second support rods 702, and the right side surfaces of the plurality of second support rods 702 are fixedly installed with first middle rods 703, the length of the front upper first middle rod 703 is greater than the length of the bottom first middle rod 703, the length of the bottom first middle rod 703 is greater than the length of the rear upper first middle rod 703, and the inner sides of the plurality of first middle rods 703 are fixedly installed A cross rod 704 is installed, the right side surface of the left cross rod 704 is in sliding contact with the left side surface of the middle cross rod 704, and the right side surface of the middle cross rod 704 is in sliding contact with the left side surface of the right cross rod 704. The inner sides of the right sides of multiple cross rods 704 are provided with clamping grooves 705, and the multiple first middle rods 703 are at the same distance from the axis of the support sleeve 4, so that the centers of the staggered multiple cross rods 704 are always on the axis of the geometric center of the clamping block 506, thereby realizing the positioning of the motor axis clamped by the multiple clamping blocks 506, and the middle of the multiple clamping grooves 705 is clamped with an axis rod 706.

Working principle:

When the present invention is used, the axis rod 706 is first moved to the left to separate the axis rod 706 from the clamping groove 705 on the right, and then the electromagnetic rings 608 on the left and right sides are activated, and the electromagnetic rings 608 push the magnetic ring 607 to move to the side away from the clamping mechanism 5, and the magnetic ring 607 pushes the side shell 605 to move to the side away from the clamping mechanism 5, and the side shell 605 pulls the second elastic member 606 to extend, and the side shell 605 pulls the second sliding block 601 to move to the side away from the clamping mechanism 5, and the second sliding block 601 drives the cone sleeve 603 to move away from the clamping mechanism through the limit ring 602. The cone sleeve 603 drives the gear sleeve 604 to move to the side away from the clamping mechanism 5. At this time, the first elastic member 504 pulls the clamping block 506 to move to the side away from the support sleeve 4 through the first sliding block 505, so that the clamping block 506 continues to fit with the inner inclined surface of the cone sleeve 603, thereby increasing the diameter of the circle formed by the clamping block 506 close to the support sleeve 4. At the same time, the clamping block 506 drives the cross rod 704 of the same position mechanism 7 to move and separate to the side away from the support sleeve 4, so that the middle part between the multiple cross rods 704 is enough for the motor shaft to pass through.

Then, the motor shaft is passed through the middle parts of the right-side multiple clamping blocks 506 and the left-side multiple clamping blocks 506 from the right side in sequence, and at the same time, the axis rod 706 passes through the inner hole of the motor shaft, and then the power supply of the electromagnetic ring 608 is disconnected, the electromagnetic ring 608 is restored, and the second elastic member 606 pulls the side shell 605 to move in the direction of the clamping mechanism 5, and the side shell 605 pushes the cone sleeve 603 to move in the direction of the clamping mechanism 5 through the second sliding block 601 and the limit ring 602, and the cone sleeve 603 pushes the clamping block 506 to move in the direction of the support sleeve 4, and the clamping block 506 stretches the first elastic member 504 through the first sliding block 505, and the clamping block 506 clamps the motor shaft in the middle thereof, and at the same time moves the axis rod 706 to the right, so that the axis rod 706 is reinserted into the middle part of the intersection hole of the multiple clamping grooves 705;

Then start the driving member 302, the output shaft of the driving member 302 drives the driving shaft 303 to rotate at high speed, the driving shaft 303 drives the driving wheel 304 to rotate at high speed, the driving wheel 304 drives the gear sleeve 604 to rotate at high speed, and the inner inclined surface of the high-speed rotating gear sleeve 604 slides at high speed along the end of the clamping block 506 away from the support sleeve 4, thereby overcoming the problem that when the number of left and right movements of the existing non-rotating cone sleeve 603 increases, the wear resistance of different positions of the cone sleeve 603 and the elastic force of different first elastic members 504 are deviated, resulting in different degrees of wear of the part of the cone sleeve 603 in contact with the clamping block 506, resulting in the cone sleeve 603 pushing the clamping block 506 to clamp the motor shaft in the direction of the support sleeve 4. The cone sleeve 603 is offset to the side with high wear degree, causing the axis of the motor shaft to be offset to the side with high wear degree of the cone sleeve 603, causing the axis of the subsequent optical detection lens to be offset from the axis of the inner hole of the motor shaft, resulting in the need to reposition the optical detection lens. At this time, not only the preparation time of the motor shaft detection stage will be increased, but also the error caused by the repositioning of the optical detection lens will reduce the detection accuracy. In addition, by setting the cone sleeve 603 to rotate at a high speed, the clamping block 506 can quickly pass over the high wear area of the cone sleeve 603, so that the smallest wear area of the cone sleeve 603 replaces the largest wear area of the cone sleeve 603, eliminating the error caused by the wear of the contact part between the clamping block 506 and the cone sleeve 603, and overcoming the problem of reduced detection accuracy and repositioning of the optical detection lens caused by uneven friction of the cone sleeve 603.

In addition, when the present invention is used, when the friction degree of the clamping block 506 on one side is greater than that of the clamping block 506 on the other side, the clamping block 506 at the other end pushes the clamping block 506 on the side with a larger axial friction degree of the clamped motor to move. At this time, the clamping block 506 drives the cross rod 704 and the clamping groove 705 to move toward the side with a larger degree of wear through the first support rod 701, the second support rod 702 and the first middle rod 703. At this time, the cross hole formed by the multiple clamping grooves 705 moves toward the side with a larger degree of wear, and the cross rod 704 pushes the axis rod 706 to move toward the side with a larger degree of friction through the clamping groove 705, so that the axis center of the axis rod 706 always coincides with the axis of the inner hole of the motor shaft, thereby realizing the guided positioning of the optical detection lens, thereby further overcoming the problem that the clamping block 506 with a higher degree of axial wear of the motor clamped by the existing clamping mechanism moves to one side, causing the axis of the motor shaft after clamping to deviate from the central axis of the support sleeve 4, resulting in the optical detection lens at the axis of the support sleeve 4 being offset from the center of the motor shaft, resulting in reduced detection accuracy and the problem of re-positioning of the optical detection lens.

It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims (7)

1. A motor shaft inner hole coaxiality detection device, comprising a base (1), characterized in that: support seats (2) are symmetrically fixedly installed on the left and right sides of the upper surface of the base (1), a driving mechanism (3) is provided on the front side of the upper surface of the base (1), the upper parts of the two support seats (2) are fixedly sleeved with support sleeves (4), the inner ends of the two support sleeves (4) are provided with symmetrical clamping mechanisms (5), the right clamping mechanism (5) comprises a chuck (501), the chuck (501) is fixedly installed on the left end of the right support sleeve (4), and the left side surface of the chuck (501) is equidistantly provided with a plurality of first sliding grooves (502), and the first sliding grooves (502) are far away from the support sleeve. A stop block (503) is fixedly mounted on one side of the support sleeve (4); a first elastic member (504) is fixedly mounted on the side of the stop block (503) close to the support sleeve (4); a first sliding block (505) is fixedly mounted on the side of the first elastic member (504) close to the support sleeve (4); the first sliding block (505) is slidably sleeved with the first sliding groove (502); a clamping block (506) is fixedly mounted on the left side of the first sliding block (505); a plurality of second sliding grooves (507) are equidistantly provided on the circumference of the curved surface of the clamping disc (501); a positioning mechanism (6) is provided between the support sleeve (4) and the clamping mechanism (5); and a positioning mechanism (7) is provided on the right side of the clamping mechanism (5). 2. A motor shaft inner hole coaxiality detection device according to claim 1, characterized in that: the driving mechanism (3) comprises two movable seats (301), the two movable seats (301) are fixedly installed in front of the support seat (2) on the same side, a driving member (302) is fixedly installed on the front side of the middle part of the upper surface of the base (1), a driving shaft (303) is fixedly sleeved in the middle part of the output shaft of the driving member (302), the driving shaft (303) is movably sleeved with the movable seats (301) on the left and right sides, and driving wheels (304) are symmetrically fixedly sleeved on the left and right sides of the curved surface of the driving shaft (303). 3. A motor shaft inner hole coaxiality detection device according to claim 2, characterized in that: the positioning mechanism (6) on the right side comprises a plurality of second sliding blocks (601), the plurality of second sliding blocks (601) are respectively slidably sleeved with a plurality of second sliding grooves (507), the right side of the outer curved surfaces of the plurality of second sliding blocks (601) are fixedly sleeved with a limit ring (602), the limit ring (602) is movably sleeved with a tapered sleeve (603), the inner curved surface of the tapered sleeve (603) is slidably sleeved with the outer curved surface of the second sliding block (601), and the middle part of the outer curved surface of the tapered sleeve (603) is fixedly sleeved with a gear sleeve ( 604), the gear sleeve (604) is meshed with the driving wheel (304) on the same side, a side shell (605) is fixedly installed on the right end of the plurality of second sliding blocks (601), the side shell (605) is slidably sleeved with the support sleeve (4), a second elastic member (606) is fixedly installed on the left side of the inner cavity of the side shell (605), the left end of the second elastic member (606) is fixedly connected to the right side surface of the adjacent chuck (501), a magnetic ring (607) is fixedly installed on the left side surface of the inner side of the side shell (605), and an electromagnetic ring (608) is fixedly installed on the right side surface of the chuck (501) on the right side. 4. A motor shaft inner hole coaxiality detection device according to claim 3, characterized in that: the right-side alignment mechanism (7) comprises a plurality of first support rods (701), the plurality of first support rods (701) are respectively fixed to the middle of the left side of the adjacent clamping block (506), the outer side surfaces of the plurality of first support rods (701) are fixedly mounted with second support rods (702), the right side surfaces of the plurality of second support rods (702) are fixedly mounted with first middle rods (703), the length of the first middle rod (703) on the front upper side is greater than the length of the first middle rod (703) at the bottom, and the length of the first middle rod (703) at the bottom is The length is greater than that of the first middle rod (703) at the upper rear side, and a cross rod (704) is fixedly installed on the inner side of each of the first middle rods (703). The right side surface of the left cross rod (704) is in sliding contact with the left side surface of the middle cross rod (704), and the right side surface of the middle cross rod (704) is in sliding contact with the left side surface of the right cross rod (704). A clamping groove (705) is provided on the inner side of the right side surface of each of the cross rods (704). The distances from the first middle rods (703) to the axis of the support sleeve (4) are the same, and an axis rod (706) is clamped in the middle of each of the clamping grooves (705). 5. A motor shaft inner hole coaxiality detection device according to claim 1, characterized in that: a gap is left between the right side surface of the clamping block (506) and the left side surface of the chuck (501), and a curved surface is provided on the side of the clamping block (506) close to the support sleeve (4). 6. A motor shaft inner hole coaxiality detection device according to claim 3, characterized in that: the driving member (302) adopts a high-speed motor, and the length of the driving wheel (304) is greater than the displacement length of the tapered sleeve (603) driving the gear sleeve (604). 7. A motor shaft inner hole coaxiality detection device according to claim 3, characterized in that: the tapered sleeve (603) is made of wear-resistant material, the elastic force of the second elastic member (606) is greater than the sum of the elastic forces of the plurality of first elastic members (504), and when the electromagnetic ring (608) is energized, the magnetic poles of the magnetic ring (607) and the electromagnetic ring (608) are in opposite directions.