CN115598529A

CN115598529A - Counter potential testing device for stepping motor

Info

Publication number: CN115598529A
Application number: CN202211451426.XA
Authority: CN
Inventors: 盛祎; 吴春扣; 戈翔俊
Original assignee: Changzhou Sanxie Motor Co ltd
Current assignee: Changzhou Sanxie Motor Co ltd
Priority date: 2022-11-20
Filing date: 2022-11-20
Publication date: 2023-01-13
Anticipated expiration: 2042-11-20
Also published as: CN115598529B

Abstract

The invention discloses a counter potential testing device of a stepping motor, which comprises a rack, wherein a top plate is arranged at the top of the rack, a round hole is formed in the middle of the top plate, a supporting ring which is coaxial with the round hole is arranged at the top of the top plate, a testing assembly is arranged below the top plate, a lifting assembly used for realizing height adjustment of the testing assembly is arranged in the rack, the testing assembly comprises a second rectangular supporting plate, an installation cylinder is fixed at the middle of the bottom of the second rectangular supporting plate, a servo motor is arranged at the position, close to the inner part of the installation cylinder, of the lower part of the second rectangular supporting plate, a clamping shaft assembly is fixed on the outer wall of the top of the second rectangular supporting plate through an output shaft of the servo motor, and the clamping shaft assembly comprises a lining cylinder. The screw rod resetting device is convenient to disassemble and assemble, efficient and convenient, greatly improves the testing efficiency, can realize the quick descending of the testing assembly, can carry out quick assembly and disassembly, and greatly improves the efficiency compared with the condition that the speed reducing motor drives the screw rod to rotate so as to reset the screw rod.

Description

Counter potential testing device for stepping motor

Technical Field

The invention relates to the technical field of motor processing production, in particular to a counter potential testing device for a stepping motor.

Background

A stepper motor is an electric motor that converts electrical pulse signals into corresponding angular or linear displacements. The rotor rotates by an angle or one step before inputting a pulse signal, the output angular displacement or linear displacement is proportional to the input pulse number, and the rotating speed is proportional to the pulse frequency, so that the stepping motor is also called a pulse motor, and the largest difference of the stepping motor relative to other control motors is that the stepping motor receives a digital control signal (an electric pulse signal) and converts the digital control signal into the corresponding angular displacement or linear displacement, and the stepping motor is an execution element for completing the conversion of a digital mode. Furthermore, it can be controlled by the position of the open loop, and a defined position increment is obtained by inputting a pulse signal, so that the cost of the incremental position control system is obviously reduced compared with the traditional direct current control system, and the system adjustment is hardly needed. The angular displacement of the stepping motor is strictly proportional to the number of pulses input and is synchronized in time with the pulses. Therefore, the required rotation angle, speed and direction can be obtained by controlling the number and frequency of the pulses and the phase sequence of the motor winding, and the split type stepping motor belongs to a common stepping motor and is widely applied to production and processing.

Split type step motor is because of stator module and rotor subassembly each are the product accessory that dispatches from the factory, need detect the cooperation parameter between two subassemblies before dispatching from the factory, and the test of back emf also is the partly that detects, according to the electromagnetism law, when magnetic field variation, near conductor can produce induced electromotive force, and its direction accords with Faraday's law and lenz's law, and is just opposite with the voltage that originally adds at the coil both ends, and this voltage is just back emf. The rotor of the motor rotates to cut magnetic lines of force to generate an induced potential, the direction of the induced potential is opposite to that of an external voltage, so that the motor is called as a motor counter electromotive force, and because a product rotor assembly has strong magnetism and has strong vertical and horizontal drawing forces in the assembling process, a manual operation mode brings many problems on safety, product quality and working efficiency, so that the counter electromotive force testing device for the stepping motor is provided.

Disclosure of Invention

Based on the technical problems in the background art, the invention provides a counter potential testing device for a stepping motor.

The invention provides a stepping motor back electromotive force testing device, which comprises a frame, wherein a top plate is arranged at the top of the frame, a round hole is formed in the middle of the top plate, a supporting ring which is coaxially arranged with the round hole is arranged at the top of the top plate, a testing assembly is arranged below the top plate, a lifting assembly for realizing height adjustment of the testing assembly is arranged in the frame, the testing assembly comprises a second rectangular supporting plate, an installation cylinder is fixed at the middle of the bottom of the second rectangular supporting plate, a servo motor is arranged at the position, close to the inner part of the installation cylinder, of the lower part of the second rectangular supporting plate, a clamping shaft assembly is fixed on an output shaft of the servo motor through the outer wall of the top of the second rectangular supporting plate, the clamping shaft assembly comprises a lining cylinder, a shaft sleeve is arranged at the lower part of the lining cylinder, and axle sleeve and servo motor output shaft fixed connection, lining section of thick bamboo upper portion outer periphery is provided with the rectangle hinge groove that is the annular distribution, and the rectangle hinge inslot articulates there is the clamp splice, lining section of thick bamboo upper portion outer periphery is provided with the rectangular channel that is the annular distribution, and rectangular channel both sides inner wall all is provided with the rectangle opening that the equidistance distributes, lining section of thick bamboo top cover is equipped with the locking ring, the locking ring lower part is close to rectangular channel position department and is provided with the flexure strip, and the flexure strip lower extreme is close to rectangular channel one side and is provided with the location latch, the location latch card is established in the rectangle opening, the roof top is close to support ring upper portion and is provided with casing fixed establishment, be provided with planar bearing in the support ring, be provided with location bearing in the planar bearing, location bearing's inner ring top is provided with the screw that is the annular distribution.

As a further optimization of the technical scheme, the back electromotive force testing device for the stepping motor is characterized in that a spring is arranged in the bushing and close to the lower part of the movable ring, and the spring and the internal threaded pipe are coaxially arranged.

According to the device for testing the back electromotive force of the stepping motor, the shell fixing mechanism comprises a horizontally arranged supporting plate, a circular through hole is formed in the middle of the top of the supporting plate, supporting columns are arranged at four corners of the bottom of the supporting plate, the lower ends of the supporting columns are fixedly connected with the top of the top plate, symmetrically distributed clamping covers are arranged on the top of the supporting plate in a sliding mode, semicircular notches are formed in the sides, close to the circular through hole, of the clamping covers, rectangular grooves matched with the supporting plate are formed in the clamping covers, strip-shaped holes are formed in the two sides of the supporting plate, metal pins are inserted into the two strip-shaped holes, the two metal pins are fixedly connected with one ends of the two sides of the supporting plate respectively, a locking screw is rotatably arranged on the side, far away from the semicircular notches, the locking screw is in threaded connection with one side of the supporting plate, rectangular flat bars are arranged in the middle of the two sides of the supporting plate, trapezoidal notches are formed in the positions, close to the two rectangular flat bars, and the lower sides of the trapezoidal notches are of the inclined plane structures.

As a further optimization of the technical scheme, the counter potential testing device for the stepping motor is characterized in that a movable ring is arranged in a lining cylinder, trigger blocks which are distributed in an annular shape at equal intervals are arranged at the top of the movable ring, the trigger blocks are arranged in a rectangular groove in a sliding manner, rectangular openings which are distributed in an annular shape at equal intervals are formed in the movable ring, clamping blocks penetrate through the rectangular openings, an inner threaded pipe is coaxially arranged at the lower part of the movable ring, a threaded rod is matched with the inner threads of the inner threaded pipe, a second gear is fixed at the lower part of the outer peripheral surface of the threaded rod, a mounting hole which extends along the radial direction of the outer peripheral surface of the lining cylinder is formed in the outer peripheral surface of the lining cylinder, a rotating shaft is rotatably arranged in the mounting hole, a first gear is arranged at one end, close to the interior of the lining cylinder, of the rotating shaft, and the first gear is meshed with the second gear.

As a further optimization of the technical scheme, the stepping motor back electromotive force testing device comprises a bottom plate, wherein four guide rods distributed in a matrix manner are arranged at the top of the bottom plate, positioning sliding sleeves are arranged at four corners of a second rectangular supporting plate and are respectively sleeved on the four guide rods, the same first rectangular supporting plate is arranged below the four guide rods and close to an installation cylinder in a sliding manner, a speed reducing motor is fixed at the middle position of the lower portion of the first rectangular supporting plate, an output shaft of the speed reducing motor penetrates through the outer wall of the top of the first rectangular supporting plate and is connected with a lead screw, a lead screw nut is fixed at the middle position of the bottom of the installation cylinder and is matched with the lead screw, and a positioning assembly for limiting the sliding of the first rectangular supporting plate is arranged at the top of the first rectangular supporting plate.

As a further optimization of the technical scheme, the back electromotive force testing device for the stepping motor is characterized in that a rubber cushion is fixed at the middle position of the top of the bottom plate.

As a further optimization of the technical scheme, the positioning assembly comprises a rotary table, the rotary table is provided with four positioning card holes distributed in a matrix manner, the four guide rods respectively penetrate through the four positioning card holes, a lining ring is rotatably arranged in the middle of the rotary table and fixedly connected with the top of the first rectangular supporting plate, an output shaft of the speed reducing motor penetrates through the lining ring, the top of the rotary table is provided with arc-shaped grooves distributed in an annular manner, the lining ring is provided with arc-shaped elastic strips distributed in an annular manner, the arc-shaped elastic strips correspond to the arc-shaped grooves one by one, the arc-shaped elastic strips are clamped in the arc-shaped grooves, the rotary table is provided with the arc-shaped holes, the arc-shaped holes are coaxial with the outer circumference of the rotary table, and the four guide rods are provided with positioning circular grooves distributed at equal intervals.

As a further optimization of the technical scheme, in the counter potential testing device for the stepping motor, the width of the positioning circular groove in the vertical direction is greater than the thickness of the turntable.

As a further optimization of the technical scheme, in the counter potential testing device for the stepping motor, the positioning pin is inserted into the arc-shaped hole and is fixedly connected with the top of the first rectangular supporting plate.

As a further optimization of the technical scheme, in the counter potential testing device for the stepping motor, the peripheral surface of the turntable is provided with the rubber wrapping edge, and the rubber wrapping edge is provided with the anti-skid lines.

In conclusion, the beneficial effects of the invention are as follows:

1. the invention provides a counter potential testing device of a stepping motor, which can be used for quickly fixing a shell of the split stepping motor through an arranged shell fixing mechanism, and can be used for quickly clamping the outer side of the edge of the split stepping motor by moving down clamping covers in the process that two clamping covers are mutually closed by combining a locking screw rod, a trapezoidal opening and a rectangular flat strip.

2. The invention provides a stepping motor back electromotive force testing device, which can rapidly clamp a rotating shaft of a rotating speed assembly through an arranged clamping shaft assembly, realizes synchronous contraction of clamping blocks by matching with an arranged locking ring, greatly improves the clamping concentricity of a rotating shaft part of a rotor assembly, is beneficial to improving the reliability of a test result, better simulates the operation condition of a split type stepping motor after assembly, and enables the test result to be more representative.

Drawings

Fig. 1 is a schematic structural diagram of a counter potential testing device for a stepping motor according to the present invention;

fig. 2 is a schematic cross-sectional structural diagram of a counter electromotive force testing apparatus for a stepping motor according to the present invention;

FIG. 3 is a schematic structural diagram of a casing fixing mechanism of a counter-potential testing apparatus for a stepping motor according to the present invention;

fig. 4 is a schematic diagram of a local explosion structure of a lifting assembly and a positioning assembly of a stepping motor back electromotive force testing device according to the present invention;

FIG. 5 is a schematic structural diagram of a chuck assembly of a counter electromotive force testing apparatus for a stepping motor according to the present invention;

fig. 6 is a schematic structural diagram of a bushing of a counter potential testing device for a stepping motor according to the present invention;

fig. 7 is a schematic cross-sectional structural view of a clamp shaft assembly of a counter electromotive force testing apparatus for a stepping motor according to the present invention;

fig. 8 is a schematic structural diagram of a locking ring of a counter potential testing device for a stepping motor according to the present invention;

fig. 9 is a schematic structural diagram of a stepping motor unit of a counter potential testing device for a stepping motor according to the present invention;

fig. 10 is a schematic structural diagram of a positioning bearing and a plane bearing of a counter electromotive force testing device of a stepping motor according to the present invention.

In the figure: 1. a frame; 2. a lifting assembly; 201. a guide rod; 202. a base plate; 203. a screw rod; 204. a reduction motor; 205. positioning the circular groove; 206. a rubber cushion; 207. a first rectangular pallet; 3. a positioning assembly; 301. a turntable; 302. positioning the clamp hole; 303. an arc-shaped hole; 304. positioning pins; 305. a gasket; 306. an arc-shaped elastic strip; 307. an arc-shaped slot; 4. a top plate; 5. testing the component; 501. mounting the cylinder; 502. a servo motor; 503. a second rectangular pallet; 504. positioning the sliding sleeve; 6. a clamp shaft assembly; 601. a liner; 6011. a rectangular hinge slot; 602. a rectangular groove; 6021. a rectangular opening; 603. a clamping block; 604. locking a ring; 6041. an elastic sheet; 6042. positioning latch teeth; 605. a movable ring; 6051. an internally threaded tube; 6052. a trigger block; 606. a spring; 607. a rotating shaft; 6071. a first gear; 608. a threaded rod; 6081. a second gear; 7. a support ring; 701. positioning the bearing; 702. a plane bearing; 8. a housing fixing mechanism; 801. a support plate; 802. a clip cover; 803. locking the screw rod; 804. a metal pin; 805. a strip-shaped hole; 806. rectangular flat bars; 807. a trapezoidal notch; 9. a stepping motor unit; 901. a stator assembly; 902. a rotor assembly.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to fig. 1 to 10 in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-10, the counter potential testing device for the stepping motor comprises a frame 1, wherein a top plate 4 is arranged at the top of the frame 1, a round hole is formed in the middle of the top plate 4, a supporting ring 7 which is coaxial with the round hole is arranged at the top of the top plate 4, a testing assembly 5 is arranged below the top plate 4, and a lifting assembly 2 used for achieving height adjustment of the testing assembly 5 is arranged in the frame 1.

The testing component 5 comprises a second rectangular supporting plate 503, an installation cylinder 501 is fixed at the middle position of the bottom of the second rectangular supporting plate 503, a servo motor 502 is arranged at the position, close to the inner position of the installation cylinder 501, of the lower portion of the second rectangular supporting plate 503, an output shaft of the servo motor 502 penetrates through the outer wall of the top of the second rectangular supporting plate 503 and is fixed with a clamping shaft component 6, the clamping shaft component 6 is mainly used for clamping a rotating shaft of a rotor component 902 containing a rotating shaft portion, and then the rotor component 902 is driven to rotate through the testing component so as to generate a testing condition.

The clamping shaft assembly 6 comprises a lining cylinder 601, a shaft sleeve is arranged at the lower part of the lining cylinder 601 and is fixedly connected with an output shaft of a servo motor 502, a rectangular hinge groove 6011 distributed annularly is arranged on the outer circumferential surface of the upper part of the lining cylinder 601, a clamping block 603 is hinged in the rectangular hinge groove 6011, a rectangular groove 602 distributed annularly is arranged on the outer circumferential surface of the upper part of the lining cylinder 601, rectangular openings 6021 distributed equidistantly are arranged on the inner walls of two sides of the rectangular groove 602, a locking ring 604 is sleeved at the top of the lining cylinder 601, an elastic sheet 6041 is arranged at the position, close to the rectangular groove 602, of the lower part of the locking ring 604, a positioning latch 6042 is arranged at one side, close to the rectangular groove 602, of the lower end of the elastic sheet 6041, the positioning latch 6042 is clamped in the rectangular openings 6021, a movable ring 605 is arranged inside the lining cylinder 601, a trigger 6052 distributed annularly at the top of the movable ring 605, and the trigger block 6052 is arranged in the rectangular groove 602 in a sliding way, the movable ring 605 is provided with rectangular openings which are distributed annularly at equal intervals, the clamping block 603 passes through the rectangular openings, the lower part of the movable ring 605 is coaxially provided with an internal threaded pipe 6051, the internal threaded pipe 6051 is in internal thread fit with a threaded rod 608, a second gear 6081 is fixed at the lower part of the outer peripheral surface of the threaded rod 608, the outer circumference of the lining cylinder 601 is provided with a mounting hole which extends along the radial direction of the lining cylinder, a rotating shaft 607 is arranged in the mounting hole in a rotating way, one end of the rotating shaft 607 close to the inner part of the lining cylinder 601 is provided with a first gear 6071, the first gear 6071 is meshed with the second gear 6081, when the clamping block 603 needs to be loosened, because the locking ring 604 is positioned under the action of the positioning latch 6042, the rotating shaft 607 drives the first gear 6071 to rotate, thereby driving the second gear 6081 to rotate, driving the threaded rod 608 which is coaxial with the second gear 6081 to rotate, because the threaded rod 608 is in threaded fit with the internal threaded tube 6051, the internal threaded tube 6051 is inevitably driven to ascend or descend in the rotating process, here, the movable ring 605 needs to be driven to descend, the trigger block 6052 on the movable ring 605 is in contact with the positioning latch 6042 in the descending process of the movable ring 605, the positioning latch 6042 is ejected out of the rectangular opening 6021, meanwhile, the trigger block 6052 is placed in the rectangular groove 602, the positioning latch 6042 is limited to be clamped into other rectangular openings 6021 in the ascending process of the locking ring 604, and when the locking ring 604 moves upwards, the clamping blocks 603 can be dispersed, so that the purpose of taking down the rotating shaft is achieved.

The spring 606 is arranged in the bushing 601 and close to the lower part of the movable ring 605, the spring 606 and the internally threaded pipe 6051 are coaxially arranged, and the arrangement of the spring 606 is helpful for improving the stability of the movable ring 605, so that the purpose of promoting the return of the movable ring 605 is achieved.

The top of the top plate 4 is provided with a machine shell fixing mechanism 8 close to the upper part of the support ring 7, the support ring 7 is internally provided with a plane bearing 702, the plane bearing 702 is internally provided with a positioning bearing 701, and the top of an inner ring of the positioning bearing 701 is provided with screw holes distributed annularly.

Casing fixed establishment 8 includes the backup pad 801 that the level set up, and backup pad 801 top intermediate position department is provided with circular perforation, four corner position departments in backup pad 801 bottom all are provided with the support column, and support column lower extreme and 4 top fixed connection on the roof, backup pad 801 top slides and is provided with the double-layered 802 that is the symmetric distribution, and double-layered 802 is close to circular perforation one side and is provided with the semicircle opening, be provided with the rectangular channel with backup pad 801 looks adaptation in the double-layered 802, backup pad 801 both sides all are provided with bar hole 805, and all insert in two bar holes 805 and be equipped with metal round pin 804, two metal round pin 804 respectively with backup pad 801 both sides one end fixed connection, double-layered 802 keeps away from semicircle opening one side and rotates and is provided with locking screw 803, and locking screw 803 forms threaded connection with backup pad 801 one side, backup pad 801 both sides middle part all is provided with rectangle ribbon 806, double-layered 802 both sides are close to two rectangle ribbon 806 position departments and all are provided with trapezoidal opening 807, trapezoidal opening downside is the inclined plane structure.

Lifting unit 2 includes bottom plate 202, and bottom plate 202 top is provided with four guide bars 201 that are the matrix distribution, four corners of second rectangle layer board 503 all are provided with location sliding sleeve 504, and four location sliding sleeve 504 overlap respectively and establish on four guide bars 201, four guide bar 201 is close to installation section 501 below and slides and is provided with same first rectangle layer board 207, first rectangle layer board 207 lower part intermediate position department is fixed with gear motor 204, and gear motor 204 output shaft passes first rectangle layer board 207 top outer wall and is connected with lead screw 203, installation section 501 bottom intermediate position department is fixed with screw-nut, and screw-nut and lead screw 203 cooperation, first rectangle layer board 207 top is provided with the gliding locating component 3 of first rectangle layer board 207 of restriction, bottom plate 202 top intermediate position department is fixed with rubber cushion 206.

The positioning assembly 3 includes a rotary disc 301, four positioning card holes 302 distributed in a matrix are arranged on the rotary disc 301, four guide rods 201 respectively pass through the four positioning card holes 302, a lining ring 305 is rotatably arranged at the middle position of the rotary disc 301, the lining ring 305 is fixedly connected with the top of the first rectangular supporting plate 207, an output shaft of the speed reducing motor 204 passes through the lining ring 305, an arc-shaped groove 307 distributed in an annular shape is arranged at the top of the rotary disc 301, arc-shaped elastic strips 306 distributed in an annular shape are arranged on the lining ring 305, the arc-shaped elastic strips 306 are in one-to-one correspondence with the arc-shaped groove 307, the arc-shaped groove 303 is arranged on the rotary disc 301, the arc-shaped hole 303 is coaxial with the outer circumference of the rotary disc 301, positioning pins 303 are inserted into the arc-shaped holes, the positioning pins 304 are fixedly connected with the top of the first rectangular supporting plate 207, the four positioning round grooves 205 distributed equidistantly are arranged on the guide rods 201, the vertical width of the positioning round grooves 205 is larger than the thickness of the rotary disc 301, the rotary disc 301 is provided with rubber covered edges, and anti-sliding lines are arranged on the edges of the rotary disc 301, when the rotary disc 301 rotates, the rotary disc 302 and the positioning pins 302 and the positioning bars 201 can be reset, so that the positioning bars 201 can be reset, the positioning pins 301 can be reset, and the positioning effect of the positioning pins 201 is reduced, and the positioning pins 301 is further, and the positioning pins 301 is reduced, and the positioning effect of the positioning pins 201 is achieved.

The working principle is as follows: when in use, the clamping covers 802 on the machine shell fixing mechanism 8 are rotated and unfolded, a part of the rotor assembly 902 is fixed on the positioning bearing 701 through bolts, the stator assembly 901 of the stepping motor with the shell is placed at the middle position on the supporting plate 801, the lower part of the stator assembly 901 penetrates out from the lower part of the supporting plate 801, then the two clamping covers 802 are rotated and folded, the trapezoidal openings 807 are aligned to the rectangular flat strips 806, and then the locking screws 803 are passed through, the two clamping covers 802 are driven to close, under the matching action of the rectangular flat strips 806 and the trapezoidal openings 807, the stator assembly 901 is clamped and fixed without being fixed through a plurality of screw holes on the stepping motor unit 9, the assembly and disassembly are more convenient, then the rotating shaft part of the rotor assembly 902 is placed on the clamping shaft assembly 6, the clamping blocks 603 are pressed through pressing the locking ring 604 downwards to clamp the rotating shaft, then the speed reducing motor 204 is controlled to work, the height of the testing component 5 is adjusted by matching with the screw rod 203, the rotor assembly 902 part containing a rotating shaft is driven to be inserted into the stepping motor unit 9, the assembly required by the complete test is carried out, then the servo motor 502 in the testing component 5 is controlled to work, the rotor assembly 902 part connected with the rotating shaft can be driven to rotate, the rotating shaft of a rotating part motor is simulated to generate counter electromotive force, each winding of the stator component 901 is connected with a voltmeter to obtain a measurement value, the counter electromotive force is deduced according to the measurement value of each group of coils, after the detection is finished, the rotating disc 301 is rotated, when the positioning clamping holes 302 on the rotating disc 301 are coaxial with the corresponding guide rods 201, the rotating disc 301 can slide on the guide rods 201, so that the first rectangular supporting plate 207 is communicated to move downwards together to drive the testing component 5 to quickly descend, and then the rotating shaft 607 on the clamping shaft component 6 is rotated, the first gear 6071, the second gear 6081 and the threaded rod 608 are matched, and the arranged internal threaded pipe 6051 is combined to drive the movable ring 605 to move downwards, the trigger block 6052 on the movable ring 605 is in contact with the corresponding positioning latch 6042 to eject the positioning latch 6042 out of the rectangular groove 602, then the locking ring 604 can be reset, and then the clamping block 603 is unbound, so that the clamped rotating shaft can be smoothly taken down.

For ease of description, spatially relative terms such as "over … …", "over … …", "over … …", "over", etc. may be used herein to describe the spatial positional relationship of one device or feature to another device or feature as shown in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the accompanying drawings are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims

1. The utility model provides a step motor back emf testing arrangement, includes frame (1), its characterized in that: a top plate (4) is arranged at the top of the rack (1), a round hole is formed in the middle of the top plate (4), a support ring (7) coaxial with the round hole is arranged at the top of the top plate (4), a test assembly (5) is arranged below the top plate (4), and a lifting assembly (2) used for achieving height adjustment of the test assembly (5) is arranged in the rack (1);

the testing assembly (5) comprises a second rectangular supporting plate (503), an installation cylinder (501) is fixed at the middle position of the bottom of the second rectangular supporting plate (503), a servo motor (502) is arranged at the position, close to the inner part of the installation cylinder (501), of the lower part of the second rectangular supporting plate (503), and a shaft clamping assembly (6) is fixed on the outer wall of the top of the second rectangular supporting plate (503) through an output shaft of the servo motor (502);

the clamp shaft assembly (6) comprises a lining cylinder (601), a shaft sleeve is arranged on the lower portion of the lining cylinder (601), the shaft sleeve is fixedly connected with an output shaft of a servo motor (502), rectangular hinge grooves (6011) distributed annularly are formed in the outer circumferential surface of the upper portion of the lining cylinder (601), clamping blocks (603) are hinged in the rectangular hinge grooves (6011), rectangular grooves (602) distributed annularly are formed in the outer circumferential surface of the upper portion of the lining cylinder (601), rectangular openings (6021) distributed equidistantly are formed in the inner walls of the two sides of each rectangular groove (602), a locking ring (604) is sleeved on the top of the lining cylinder (601), an elastic sheet (6041) is arranged at a position, close to the rectangular grooves (602), of the lower portion of the locking ring (604), a positioning latch tooth (6042) is arranged at one side, close to the rectangular grooves (602), of the lower end of the elastic sheet (6041), and the positioning latch tooth (6042) is clamped in the rectangular opening (6021);

the top of the top plate (4) is provided with a machine shell fixing mechanism (8) close to the upper part of the support ring (7), a plane bearing (702) is arranged in the support ring (7), a positioning bearing (701) is arranged in the plane bearing (702), and the top of an inner ring of the positioning bearing (701) is provided with a screw hole which is distributed annularly.

2. The stepping motor back electromotive force testing device according to claim 1, wherein a spring (606) is arranged inside the bushing (601) and close to the lower part of the movable ring (605), and the spring (606) and the internally threaded pipe (6051) are coaxially arranged.

3. The stepping motor back electromotive force testing device according to claim 2, wherein the casing fixing mechanism (8) comprises a horizontally arranged support plate (801), a circular through hole is arranged in the middle of the top of the support plate (801), support columns are arranged at four corners of the bottom of the support plate (801), the lower ends of the support columns are fixedly connected with the top of the top plate (4), symmetrically distributed clamp covers (802) are arranged on the top of the support plate (801) in a sliding manner, semicircular notches are arranged on the sides, close to the circular through hole, of the clamp covers (802), rectangular grooves matched with the support plate (801) are formed in the clamp covers (802), strip-shaped holes (805) are arranged on two sides of the support plate (801), metal pins (804) are inserted into the two strip-shaped holes (801), the two metal pins (804) are fixedly connected with one ends of two sides of the support plate (801) respectively, a locking screw (803) is rotatably arranged on the side, far from the semicircular notches, a rectangular screw (805) is in threaded connection with one side of the support plate (801), rectangular notches (807) are arranged in the middle of two sides of the support plate (801), and a trapezoidal notch structure is arranged on the sides, and the two sides (806) of the rectangular notch (806) is arranged on the rectangular notch (806) close to the flat cover (806).

4. The stepping motor back electromotive force testing device according to claim 3, wherein a movable ring (605) is arranged inside the lining cylinder (601), the top of the movable ring (605) is provided with trigger blocks (6052) which are distributed in an annular shape at equal intervals, the trigger blocks (6052) are arranged in a rectangular groove (602) in a sliding manner, rectangular openings which are distributed in an annular shape at equal intervals are arranged on the movable ring (605), the clamping blocks (603) penetrate through the rectangular openings, the lower portion of the movable ring (605) is coaxially provided with an internal threaded pipe (6051), the internal threaded pipe (6051) is in threaded fit with a threaded rod (608), a second gear (6081) is fixed at the lower portion of the outer peripheral surface of the threaded rod (608), the lining cylinder (601) is provided with a mounting hole which extends in the radial direction of the lining cylinder, a rotating shaft (607) is rotatably arranged in the mounting hole, a first gear (6071) is arranged at one end, close to the inside of the lining cylinder (601), and the first gear (6071) is meshed with the second gear (6081).

5. The stepping motor back electromotive force testing device according to claim 4, wherein the lifting assembly (2) comprises a bottom plate (202), four guide rods (201) which are distributed in a matrix manner are arranged at the top of the bottom plate (202), positioning sliding sleeves (504) are arranged at four corners of the second rectangular supporting plate (503), the four positioning sliding sleeves (504) are respectively sleeved on the four guide rods (201), the four guide rods (201) are provided with the same first rectangular supporting plate (207) in a sliding manner close to the lower portion of the mounting cylinder (501), a speed reduction motor (204) is fixed at the middle position of the lower portion of the first rectangular supporting plate (207), an output shaft of the speed reduction motor (204) penetrates through the outer wall of the top of the first rectangular supporting plate (207) and is connected with a lead screw (203), a lead screw nut is fixed at the middle position of the bottom of the mounting cylinder (501) and is matched with the lead screw (203), and a positioning assembly (3) which limits the sliding of the first rectangular supporting plate (207) is arranged at the top of the first rectangular supporting plate (207).

6. The stepping motor back electromotive force testing device according to claim 5, wherein a rubber cushion (206) is fixed at a middle position of the top of the bottom plate (202).

7. The stepping motor back electromotive force testing device according to claim 5, wherein the positioning assembly (3) comprises a rotary disc (301), four positioning card holes (302) are arranged on the rotary disc (301) and distributed in a matrix, the four guide rods (201) respectively penetrate through the four positioning card holes (302), a lining ring (305) is rotatably arranged at the middle position of the rotary disc (301), the lining ring (305) is fixedly connected with the top of the first rectangular supporting plate (207), an output shaft of the speed reducing motor (204) penetrates through the lining ring (305), an arc-shaped groove (307) is arranged at the top of the rotary disc (301), arc-shaped elastic strips (306) are arranged on the lining ring (305) and distributed in an annular shape, the arc-shaped elastic strips (306) correspond to the arc-shaped grooves (307) one by one, the arc-shaped elastic strips (306) are clamped in the arc-shaped grooves (307), the rotary disc (301) is provided with the arc-shaped holes (303), the arc-shaped holes (303) are coaxial with the outer circumference of the rotary disc (301), and the positioning circular grooves (205) are coaxially distributed at equal intervals on the four guide rods (201).

8. The stepping motor back electromotive force testing device according to claim 7, wherein the width of the positioning circular groove (205) in the vertical direction is larger than the thickness of the turntable (301).

9. The stepping motor back electromotive force testing device according to claim 7, wherein a positioning pin (304) is inserted into the arc-shaped hole (303), and the positioning pin (304) is fixedly connected with the top of the first rectangular supporting plate (207).

10. The stepping motor back electromotive force testing device according to claim 7, wherein the outer peripheral surface of the turntable (301) is provided with a rubber wrapping edge, and the rubber wrapping edge is provided with anti-skid lines.