Electric stepping motor mechanism, calibration apparatus, and calibration system

Abstract

The present application relates to the technical field of industrial apparatuses. Disclosed are an electric stepping motor mechanism, a calibration apparatus, and a calibration system. The electric stepping motor mechanism comprises an electric motor, a drive assembly, and a detection assembly, wherein the drive assembly comprises a lead screw and a nut, the lead screw being in transmission connection with a rotating shaft of the electric motor, and the nut being sleeved over the lead screw and configured to move along the rotation axis of the lead screw when the electric motor drives the lead screw to rotate; and the detection assembly comprises a connecting member, a sensing block and a detection scale. One end of the connecting member is connected to the nut, and the other end of the connecting member is connected to the sensing block. The detection scale is arranged on the electric motor, the sensing block is slidably arranged on the detection scale along with the movement of the nut, and the detection scale is configured to detect the position of the sensing block relative to the detection scale. On the basis of the position of the sensing block relative to the detection scale, the position of the nut can be deduced and determined, thereby determining the movement position of a workpiece connected to the nut. In this way, the detection assembly, the electric motor and the drive assembly are integrated into a whole, thereby simplifying the electric motor mechanism.

Description

Stepper motor mechanism, calibration equipment and calibration system

[0001] This application claims priority to Chinese Patent Application No. 2025101172272, filed on January 24, 2025, entitled “Stepper Motor Mechanism, Calibration Equipment and Calibration System”, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of industrial equipment technology, and in particular to a stepper motor mechanism, calibration equipment and calibration system. Background Technology

[0003] A stepper motor is a type of electric motor that converts electrical pulse signals into corresponding angular or linear displacement. For each input pulse signal, the rotor rotates by an angle or moves forward one step. The output angular or linear displacement is proportional to the number of input pulses, and the rotational speed is proportional to the pulse frequency.

[0004] Traditional stepper motors consist of two parts: a motor lead screw drive assembly, which is used to drive the workpiece to move, and a detection switch assembly, which is used to detect the position of the workpiece. This makes the overall structure of the stepper motor very bulky. Summary of the Invention

[0005] This application aims to provide a stepper motor mechanism to solve the technical problem of the bulky overall structure of stepper motors in the prior art.

[0006] The technical problem solved by the embodiments of this application is addressed by the following technical solution:

[0007] A stepper motor mechanism is provided, characterized in that it includes:

[0008] Electric motor;

[0009] A drive assembly includes a lead screw and a nut, wherein the lead screw is driven to the rotating shaft of the motor, and the nut is sleeved on the lead screw and configured to move along the rotation axis of the lead screw when the motor drives the lead screw to rotate;

[0010] The detection assembly includes a connector, a sensing block, and a detection ruler. One end of the connector is connected to the nut, and the other end of the connector is connected to the sensing block. The detection ruler is mounted on the motor. The sensing block is slidably mounted on the detection ruler as the nut moves. The detection ruler is configured to detect the position of the sensing block relative to the detection ruler.

[0011] With the above structure, the sensing block is connected to the nut via a connector, and the nut is fitted onto the lead screw. Thus, when the motor drives the lead screw to rotate and the nut moves along the lead screw, the sensing block moves synchronously on the measuring scale. At this time, the measuring scale can detect the position of the sensing block relative to the measuring scale. Therefore, by determining the position of the nut based on the position of the sensing block relative to the measuring scale, the movement position of the workpiece connected to the nut can be determined. This integrates the detection component and the motor drive component into one unit, simplifying the motor mechanism.

[0012] In some embodiments, the detection assembly further includes a fixed base and a mounting platform, the fixed base being disposed on the motor, the mounting platform being fixedly connected to the fixed base, and the detection ruler being installed inside the mounting platform.

[0013] The above structure allows for the integration of the fixed base, mounting platform, and measuring scale, achieving seamless integration of the measuring component and the motor. Simultaneously, the measuring scale, mounted on the motor via the fixed base and mounting platform, effectively utilizes the space above the motor, significantly reducing the weight and space occupancy of the motor mechanism.

[0014] In some embodiments, the mounting platform is provided with two sliding guide rails, which are respectively disposed on both sides of the mounting platform along the rotation axis of the lead screw. The opposite sides of the sensing block abut against the sliding guide rails, and the sensing block is configured to slide along the sliding guide rails on the detection ruler.

[0015] With the above structure, the opposite sides of the sensing block abut against the sliding guide rail, and the sliding guide rail restricts the movement of the sensing block, so that the sensing block can only move along the direction of the lead screw rotation axis, avoiding lateral displacement of the sensing block, thereby improving the stability of the sensing block when moving.

[0016] In some embodiments, the two sliding guide rails are respectively provided with oppositely arranged mounting grooves, the mounting grooves passing through the sliding guide rails along the rotation axis of the lead screw, and the opposite sides of the measuring ruler are respectively engaged in the two mounting grooves.

[0017] With the above structure, the mounting slots inside the guide rail are used to install the measuring scale. The two ends of the measuring scale are engaged within the two mounting slots, ensuring stable installation. Furthermore, the opposing arrangement of the two mounting slots facilitates positioning of the measuring scale and improves the accuracy of its installation.

[0018] In some embodiments, the two sliding guide rails are respectively provided with opposite sliding grooves, the sliding grooves are arranged parallel to the mounting groove, and the bottom of the sensing block is provided with a sliding plate, the two ends of the sliding plate being engaged in the sliding groove.

[0019] With the above structure, the sliding groove is used to further limit the position of the sensing block. By engaging the sliding plate at the bottom of the sensing block, it not only restricts the lateral movement of the sensing block but also restricts its vertical movement, thus ensuring that the sensing block can only move back and forth along the axis of rotation of the lead screw. At the same time, the parallel arrangement of the sliding groove and the mounting groove further ensures the fit between the measuring scale and the sensing block, avoiding detection errors caused by gaps between the sensing block and the measuring scale.

[0020] In some embodiments, the drive assembly further includes a movable seat fixedly connected to the nut, the movable seat passing through the lead screw, and fixed blocks provided on opposite sides of the movable seat.

[0021] With the above structure, the movable seat is fixedly connected to the nut and passes through the lead screw, so that the movable seat can move with the nut. At the same time, a fixing block is set on the movable seat to provide installation space for external workpiece assembly.

[0022] In some embodiments, the connector includes a crossbeam, side plates, and a mounting bracket. The mounting bracket is mounted on the movable base. One end of each of the two side plates is fixedly connected to the horizontal sides of the mounting bracket, and the other end of each side plate is connected to both ends of the crossbeam. The crossbeam is fixedly connected to the sensing block.

[0023] With the above structure, the mounting bracket is used to fix the connector on the moving base, the crossbeam is used to install the sensing block, and the side plate is used to connect the two. Thus, when the motor drives the nut to move along the lead screw, the moving base drives the mounting bracket, the side plate, and the crossbeam, thereby driving the sensing block to move synchronously, realizing the correspondence between the position of the sensing block and the nut.

[0024] In some embodiments, the crossbeam is horizontally disposed between the two side plates, and a connecting hole is provided at the center of the crossbeam for fixing the side of the sensing block away from the detection ruler.

[0025] With the above structure, the sensing block is fixed in the center of the crossbeam through the connecting hole. When the crossbeam moves the sensing block, the stress distribution of the sensing block on the crossbeam is more uniform, thereby protecting the crossbeam, effectively extending its service life, and improving the stability of the sensing block when it moves.

[0026] Another embodiment of this application provides an automotive calibration device, including the stepper motor mechanism described in the above embodiments; and

[0027] A crossbeam, on which the stepper motor mechanism is mounted;

[0028] Base;

[0029] A column is vertically mounted on the base, and a crossbeam is installed on the column.

[0030] In another embodiment of this application, an automotive calibration system is provided, including the automotive calibration equipment described in the above embodiments; and

[0031] A diagnostic instrument, which is communicatively connected to the calibration device.

[0032] Compared to existing technologies, this method connects the sensing block to a nut via a connector, and the nut is fitted onto a lead screw. When the motor drives the lead screw to rotate and the nut moves along the lead screw, the sensing block moves synchronously on the measuring scale. The measuring scale can then detect the position of the sensing block relative to the scale. Therefore, by determining the position of the nut relative to the sensing block, the movement position of the workpiece connected to the nut can be determined. This integrates the detection component and the motor drive component into one unit, simplifying the motor mechanism. Attached Figure Description

[0033] Figure 1 is a perspective view of a stepper motor mechanism provided in an embodiment of this application;

[0034] Figure 2 is an exploded view of a stepper motor mechanism provided in an embodiment of this application;

[0035] Figure 3 is a side view of a stepper motor mechanism driving a nut to move according to an embodiment of this application;

[0036] Figure 4 is a perspective view of a stepper motor mechanism driving a nut to move according to an embodiment of this application;

[0037] Figure 5 is a front view of an automotive calibration device in one embodiment of this application.

[0038] Reference numerals: 100, Stepper motor mechanism; 10, Motor; 20, Drive assembly; 210, Lead screw; 220, Nut; 230, Moving base; 231, Fixing block; 30, Detection assembly; 310, Connector; 311, Mounting bracket; 312, Side plate; 312A, First arc-shaped surface; 312B, Second arc-shaped surface; 313, Crossbeam; 313A, Connecting hole; 320, Sensing block; 321, Sliding plate; 330, Detection ruler; 331, Sensing area; 340, Fixed base; 350, Mounting platform; 351, Sliding guide rail; 351A, Mounting groove; 351B, Sliding groove; 200, Crossbeam; 300, Base; 400, Column; 500, Machine body; 600, Vision camera. Detailed Implementation

[0039] To facilitate understanding of this utility model, a more detailed description is provided below with reference to the accompanying drawings and specific embodiments. It should be noted that when an element is described as "connected" to another element, it can be directly on the other element, or one or more intermediate elements can exist between them. The terms "upper," "lower," "left," "right," "upper end," "lower end," "top," and "bottom," etc., used in this specification indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0040] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention.

[0041] The stepper motor mechanism provided in this application will be described in detail below with reference to all the accompanying drawings and specific embodiments.

[0042] Please refer to Figure 1, which is a perspective view of a stepper motor mechanism provided in an embodiment of this application. An embodiment of this application discloses a stepper motor mechanism, including a motor 10, a drive assembly 20, and a detection assembly 30. The drive assembly 20 includes a lead screw 210 and a nut 220. The lead screw 210 is tractively connected to the rotating shaft of the motor 10, and the nut 220 is sleeved on the lead screw 210. The nut 220 is configured to move along the rotation axis of the lead screw 210 when the motor 10 drives the lead screw 210 to rotate. The detection assembly 30 includes a connector 310, a sensing block 320, and a detection ruler 330. One end of the connector 310 is connected to the nut 220, and the other end of the connector 310 is connected to the sensing block 320. The detection ruler 330 is disposed on the motor 10, and the sensing block 320 is slidably disposed on the detection ruler 330 as the nut 220 moves. The detection ruler 330 is configured to detect the position of the sensing block 320 relative to the detection ruler 330.

[0043] With the above structure, the sensing block 320 is connected to the nut 220 via the connector 310. The nut 220 is sleeved on the lead screw 210. Thus, when the motor 10 drives the lead screw 210 to rotate and the nut 220 moves along the lead screw 210, the sensing block 320 moves synchronously along the measuring scale 330. At this time, the measuring scale 330 can detect the position of the sensing block 320 relative to the measuring scale 330. Therefore, by determining the position of the sensing block 320 relative to the measuring scale 330, the position of the nut 220 can be derived, and thus the movement position of the workpiece connected to the nut 220 can be determined.

[0044] Specifically, in this embodiment, the output shaft of the motor 10 is equipped with a coupling that connects the output shaft of the motor 10 to the lead screw 210. The lead screw 210 has an external thread on its surface, and the nut 220 has an internal thread corresponding to the external thread on its inner side. When the motor 10 drives the output shaft to rotate, the lead screw 210 rotates with the output shaft, and the nut 220 moves back and forth along the rotation axis of the lead screw 210 due to the frictional force generated by the relative movement of the threads. The detection ruler 330 can be set on the top surface of the motor 10, or on the side or bottom surface of the motor 10, as long as it enables the sensing block 320 to move synchronously on the detection ruler 330 along with the nut 220. The sensing method between the sensing block 320 and the detection ruler 330 can be through resistance, capacitance, magnetic field, infrared light, ultrasound, or other methods, and is not limited thereto.

[0045] In practical applications, the drive motor 10 is usually fixed on one side, while the workpiece can be directly or indirectly connected to the nut 220. When the nut 220 moves, it drives the external workpiece to move synchronously with the nut 220.

[0046] In some other embodiments, the moving workpiece can be connected to the drive rod motor 10 side, and the position of the nut 220 can be fixed, thereby causing the drive motor 10 to move along the rotation axis of the lead screw 210, thereby driving the external workpiece to move with the drive motor 10.

[0047] Please refer to Figure 2, which is an exploded view of a stepper motor mechanism provided in an embodiment of this application.

[0048] In some embodiments, the detection component 30 further includes a fixed base 340 and a mounting platform 350. The fixed base 340 is disposed on the motor 10, the mounting platform 350 is fixedly connected to the fixed base 340, and the detection ruler 330 is installed in the mounting platform 350.

[0049] With the above structure, the fixed base 340, the mounting platform 350, and the measuring scale 330 can be installed together to achieve the integration of the measuring component 30 and the motor 10. At the same time, the measuring scale 330 is mounted on the motor 10 via the fixed base 340 and the mounting platform 350, which can effectively utilize the space on the upper side of the motor 10 and effectively reduce the weight and space occupancy of the motor 10 mechanism.

[0050] In the prior art, the stepper motor 10 mechanism typically includes two independent parts: a detection component 30 and a motor 10 drive component 20. Therefore, the overall structure of the stepper motor 10 mechanism is relatively large and bulky. In this embodiment, the detection component 30 directly mounts the detection ruler 330 to the upper side of the motor 10 via a fixed base 340 and a mounting platform 350. The sensing block 320 moves with the nut 220 and moves on the surface of the detection ruler 330 (i.e., the upper side of the motor 10), integrating the detection component 30 and the motor 10 drive component 20 into a single mechanism.

[0051] Specifically, in this embodiment, the fixed base 340 has a cuboid structure. The fixed base 340 extends outward from the side closest to the bearing housing of the motor 10, and the extended portion is also engaged with the bearing housing of the motor 10. The extended portion is provided with a mounting hole for mounting bolts, pins, or other connecting parts 310, so as to connect the end of the fixed base 340 closest to the bearing housing to the bearing housing of the motor 10. The other end of the fixed base 340 away from the bearing housing of the motor 10 extends horizontally to opposite sides, and the extended portion is also provided with mounting holes (not shown in the figure) to connect the end of the fixed base 340 away from the bearing housing to the housing of the motor 10. This achieves the connection of the fixed base 340 to the motor 10.

[0052] Mounting platform 350 is used to mount measuring scale 330. Mounting platform 350 has a rectangular structure and can be equipped with an internal cavity (not shown) to accommodate the installation or wiring of measuring scale 330. Mounting platform 350 is located on the upper side of fixed base 340. Mounting platform 350 can be connected to fixed base 340 by bolts or other connectors 310, or the mounting platform 350 and fixed base 340 can be integrated as one piece, which is not limited.

[0053] Referring to Figures 1 and 2, in some embodiments, the mounting platform 350 is provided with two sliding guide rails 351. The two sliding guide rails 351 are respectively arranged on both sides of the mounting platform 350 along the rotation axis of the lead screw 210. The opposite sides of the sensing block 320 abut against the sliding guide rails 351. The sensing block 320 is configured to slide along the sliding guide rails 351 on the detection ruler 330.

[0054] With the above structure, the opposite sides of the sensing block 320 abut against the sliding guide rail 351, and the sliding guide rail 351 restricts the movement of the sensing block 320, so that the sensing block 320 can only move along the rotation axis of the lead screw 210, avoiding lateral displacement of the sensing block 320, thereby improving the stability of the sensing block 320 when it moves.

[0055] Specifically, in this embodiment, the sliding guide rail 351 has a strip-shaped structure and is disposed on the side of the mounting platform 350 near the bearing seat of the motor 10. The two sliding guide rails 351 are arranged in parallel. The length of the sliding guide rail 351 can be adjusted according to the stroke length of the sensing block 320, as long as the length of the sliding guide rail 351 is greater than the stroke length of the sensing block 320.

[0056] In some embodiments, the two sliding guide rails 351 are respectively provided with oppositely arranged mounting grooves 351A. The mounting grooves 351A pass through the sliding guide rails 351 along the rotation axis of the lead screw 210, and the opposite sides of the detection ruler 330 are respectively engaged in the two mounting grooves 351A.

[0057] With the above structure, the mounting slots 351A inside the guide rail are used to install the measuring scale 330. The two ends of the measuring scale 330 are engaged in the two mounting slots 351A, which can stably install the measuring scale 330. At the same time, the two mounting slots 351A are arranged opposite each other, which can facilitate the positioning of the measuring scale 330 and improve the accuracy when installing the measuring scale 330.

[0058] Specifically, in this embodiment, the mounting groove 351A includes two grooves, each disposed at the bottom of one of the two sliding guide rails 351. The width of the mounting groove 351A is consistent with the height of the measuring ruler 330, so that the measuring ruler 330 can be precisely engaged within the mounting groove 351A. The two mounting grooves 351A are horizontally arranged relative to each other. When the measuring ruler 330 is engaged within the mounting groove 351A, the measuring ruler 330 can also be positioned through the mounting groove 351A, achieving a horizontal arrangement to ensure that the distance between the measuring ruler 330 and the sensing block 320 remains constant.

[0059] In some embodiments, the two sliding guide rails 351 are respectively provided with oppositely arranged sliding grooves 351B, the sliding grooves 351B are arranged parallel to the mounting grooves 351A, and the bottom of the sensing block 320 is provided with a sliding plate 321, the two ends of the sliding plate 321 are engaged in the sliding grooves 351B.

[0060] Through the above structure, the sliding groove 351B is used to further limit the position of the sensing block 320. By engaging the sliding plate 321 at the bottom of the sensing block 320, it can not only limit the lateral movement of the sensing block 320, but also limit its vertical movement, thereby ensuring that the sensing block 320 can only move back and forth along the rotation axis of the lead screw 210. At the same time, the parallel arrangement of the sliding groove 351B and the mounting groove 351A further ensures that the distance between the detection ruler 330 and the sensing block 320 is constant, avoiding detection errors caused by gaps between the sensing block 320 and the detection ruler 330.

[0061] Specifically, in this embodiment, the sliding groove 351B is disposed above the mounting groove 351A, and both sliding grooves 351B are horizontally disposed with respect to the mounting groove 351A. Both sliding grooves 351B are also relatively horizontal, serving to position the sensing block 320 and ensure its contact with the detection ruler 330. The distance between the sliding groove 351B and the mounting groove 351A is equal to the distance between the detection ruler 330 and the sensing block 320. The width of the sliding groove 351B is consistent with the thickness of the sliding plate 321. The sliding plate 321 assists the sensing block 320 in moving on the detection ruler 330 and also protects the sensing block 320.

[0062] Please refer to Figures 2 and 3. Figure 3 is a schematic diagram of a stepper motor mechanism driving a nut to move according to an embodiment of this application. In some embodiments, the drive assembly 20 further includes a movable seat 230, which is fixedly connected to the nut 220 and passes through the lead screw 210. Fixing blocks 231 are provided on opposite sides of the movable seat 230.

[0063] With the above structure, the movable seat 230 is fixedly connected to the nut 220 and passes through the lead screw 210, so that the movable seat 230 can move with the nut 220. At the same time, the movable seat 230 is provided with a fixing block 231 to provide installation space for external workpiece assembly.

[0064] Specifically, the movable seat 230 has a cuboid structure and a threaded through hole inside for mounting on the lead screw 210. The movable seat 230 also has three connecting holes corresponding to the nut 220, for mounting bolts to connect the movable seat 230 to the nut 220. Protruding shafts are provided on opposite sides of the movable seat 230, and fixing blocks 231 are mounted on these protruding shafts. The fixing blocks 231 are rotatably connected to the protruding shafts and abut against an external workpiece. When the nut 220 moves along the lead screw 210, the movable seat 230 moves synchronously. At this time, the fixing blocks 231 partially abut against the external workpiece, causing the fixing blocks 231 to rotate and push the external workpiece to rotate accordingly.

[0065] In some other embodiments, the fixing seat is in contact with the external workpiece as a whole, then the fixing block 231 does not rotate but moves with the fixing seat, while pushing the external workpiece to move with it.

[0066] In some embodiments, the connector 310 includes a crossbeam 313, side plates 312, and a mounting bracket 311. The mounting bracket 311 is mounted on the movable seat 230. One end of each of the two side plates 312 is fixedly connected to the horizontal sides of the mounting bracket 311, and the other end of each of the two side plates 312 is connected to both ends of the crossbeam 313. The crossbeam 313 is fixedly connected to the sensing block 320.

[0067] With the above structure, the mounting bracket 311 is used to fix the connector 310 on the movable seat 230, the crossbeam 313 is used to install the sensing block 320, and the side plate 312 is used to connect the two. Thus, when the motor 10 drives the nut 220 to move along the lead screw 210, the movable seat 230 drives the mounting bracket 311, the side plate 312 and the crossbeam 313, thereby driving the sensing block 320 to move synchronously, realizing the correspondence between the positions of the sensing block 320 and the nut 220.

[0068] Specifically, the end of the mounting bracket 311 near the nut 220 is bent and fitted onto the movable base 230. Two symmetrical connecting holes are provided on the bent portion to connect the mounting bracket 311 to the movable base 230 via bolts or other components. The other end of the mounting bracket 311 away from the nut 220 extends to opposite sides, and two side plates 312 are connected to the extensions respectively. The ends of the two side plates 312 away from the mounting bracket 311 are respectively connected to the two ends of the crossbeam 313. The lengths and specifications of the two side plates 312 are consistent to ensure that the crossbeam 313 is perpendicular to the rotation axis of the lead screw 210. The mounting bracket 311, side plates 312, and crossbeam 313 can be connected by welding or integral molding; there is no limitation on this.

[0069] In some embodiments, the crossbeam 313 is horizontally disposed between the two side plates 312, and a connecting hole 313A is provided at the center of the crossbeam 313 for fixing the side of the sensing block 320 away from the detection ruler 330.

[0070] With the above structure, the center of the crossbeam 313 is fixed with the sensing block 320 through the connecting hole. When the crossbeam 313 moves the sensing block 320, the stress distribution of the sensing block 320 on the crossbeam 313 is more uniform, thereby protecting the crossbeam 313, effectively extending its service life, and improving the stability of the sensing block 320 when it moves.

[0071] Specifically, two connecting holes 313A are symmetrically provided at the center of the crossbeam 313. The two connecting holes 313A are used to install bolts and other components to connect the sensing block 320 to the crossbeam 313.

[0072] In some embodiments, the side plate 312 is provided with a downwardly curved first arcuate surface 312A at one end near the mounting bracket 311, and the side plate 312 is provided with an upwardly curved second arcuate surface 312B at one end near the crossbeam 313. The portion between the first arcuate surface 312A and the second arcuate surface 312B is parallel to the rotation axis of the lead screw 210.

[0073] With the above structure, the first arc-shaped surface 312A and the second arc-shaped surface 312B at both ends of the side plate 312 are respectively constructed to be bent downward and upward, so as to connect the mounting bracket 311 at the lower position of the side plate 312 and the crossbeam 313 at the higher position, so that the middle part of the side plate 312 can be parallel to the rotation axis of the lead screw 210, making the side plate 312 more stable when it moves.

[0074] Specifically, since the mounting bracket 311 is connected to the nut 220 and is at the same or similar height as the drive motor 10, while the measuring scale 330 is located above the motor 10, the position of the crossbeam 313 above the measuring scale 330 is obviously higher than the position of the mounting bracket 311. Therefore, to solve the height difference between the mounting bracket 311 and the crossbeam 313, a downwardly curved first arc surface 312A and an upwardly curved second arc surface 312B are provided on the side plate 312 to solve the height difference between the two. At the same time, the part between the first arc surface 312A and the second arc surface 312B is set horizontally, which is more stable.

[0075] In some other embodiments, the side plate 312 may also be a straight side plate 312 that obliquely connects the crossbeam 313 and the mounting bracket 311, or it may be an L-shaped side plate 312 with a corner. Those skilled in the art can choose according to actual needs.

[0076] Please refer to Figures 2 and 4. Figure 4 is a perspective view of a stepper motor mechanism driving a nut to move according to an embodiment of this application. In some embodiments, the detection ruler 330 is provided with a sensing area 331, which is configured to detect the position of the sensing block 320. The sensing block 320 follows the movement of the nut 220 and is located within the sensing area 331.

[0077] With the above structure, the sensing area 331 of the detection ruler 330 covers the movement stroke of the sensing block 320, so that the sensing block 320 can move with the nut 220 to any position, and the detection ruler 330 can detect and determine the position of the sensing block 320, thereby detecting any movement position of the nut 220 and the workpiece.

[0078] Specifically, the detection ruler 330 has a detection element in the sensing area 331. The specific type of the detection element can be selected according to different sensing methods, such as having an electrode layer with a dielectric layer. The length of the sensing area 331 is set according to the moving stroke of the sensing block 320, as long as it can completely cover the moving stroke of the sensing block 320.

[0079] Please refer to Figure 5, which is a front view of the vehicle calibration device in one embodiment of this application. Another embodiment of this application also provides a vehicle calibration device, including the stepper motor mechanism 100 from any of the above embodiments. The vehicle calibration device includes a crossbeam 200, a base 300, a column 400, and a machine body 500. The column 400 is vertically mounted on the base 300, and the crossbeam 200 is mounted on the column 400. A fine-tuning device (not shown) is provided on the crossbeam 200, and the fine-tuning device is connected to a vision camera 600 for calibrating the vehicle. The stepper motor mechanism 100 is disposed within the fine-tuning device to adjust the posture of the vision camera 600, thereby improving calibration accuracy.

[0080] In another embodiment of this application, an automotive calibration system is provided, including the automotive calibration equipment described in the above embodiments and a diagnostic instrument. The diagnostic instrument is communicatively connected to the automotive calibration equipment. The diagnostic instrument can be a flat-panel diagnostic instrument for easy carrying and transportation. The diagnostic instrument is communicatively connected to an AVM laser to receive vehicle image data captured by the AVM laser. Optionally, the calibration system may further include calibration elements such as a target, a rearview mirror, and a laser.

[0081] In summary, the stepper motor 10 mechanism provided in this application embodiment has a sensing block 320 connected to a nut 220 via a connector 310. The nut 220 is sleeved on a lead screw 210. Thus, when the motor 10 drives the lead screw 210 to rotate and the nut 220 moves along the lead screw 210, the sensing block 320 moves synchronously on the detection ruler 330. At this time, the detection ruler 330 can detect the position of the sensing block 320 relative to the detection ruler 330. Therefore, the position of the nut 220 can be determined by the position of the sensing block 320 relative to the detection ruler 330, thereby determining the movement position of the workpiece connected to the nut 220. Furthermore, by mounting the detection ruler 330 on the upper side of the motor 10 and connecting the sensing block 320 to the nut 220 via the connector 310, the detection component 30 and the motor 10 drive component 20 are integrated into one unit, simplifying the motor 10 mechanism.

[0082] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it; under the concept of this utility model, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of different aspects of this utility model as described above. For the sake of brevity, they are not provided in detail; although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A stepper motor mechanism, characterized in that, include: Electric motor; A drive assembly includes a lead screw and a nut. The lead screw is driven to the rotating shaft of the motor, and the nut is sleeved on the lead screw. The nut is configured to move along the rotation axis of the lead screw when the motor drives the lead screw to rotate. The detection assembly includes a connector, a sensing block, and a detection ruler. One end of the connector is connected to the nut, and the other end of the connector is connected to the sensing block. The detection ruler is mounted on the motor. The sensing block is slidably mounted on the detection ruler as the nut moves. The detection ruler is configured to detect the position of the sensing block relative to the detection ruler.

2. The stepper motor mechanism according to claim 1, characterized in that, The detection assembly also includes a fixed base and a mounting platform. The fixed base is disposed on the motor, the mounting platform is fixedly connected to the fixed base, and the detection ruler is installed in the mounting platform.

3. The stepper motor mechanism according to claim 2, characterized in that, The mounting platform is provided with two sliding guide rails, which are respectively located on both sides of the mounting platform along the rotation axis of the lead screw. The opposite sides of the sensing block abut against the sliding guide rails, and the sensing block is configured to slide along the sliding guide rails on the measuring ruler.

4. The stepper motor mechanism according to claim 3, characterized in that, The two sliding guide rails are also provided with oppositely arranged mounting grooves. The mounting grooves pass through the sliding guide rails along the rotation axis of the lead screw, and the opposite sides of the measuring ruler are respectively engaged in the two mounting grooves.

5. The stepper motor mechanism according to claim 4, characterized in that, The two sliding guide rails are also provided with opposite sliding grooves, which are parallel to the mounting groove. The bottom of the sensing block is provided with a sliding plate, and the two ends of the sliding plate are engaged in the sliding groove.

6. The stepper motor mechanism according to claim 1, characterized in that, The drive assembly also includes a movable seat, which is fixedly connected to the nut and passes through the lead screw. Fixed blocks are provided on opposite sides of the movable seat.

7. The stepper motor mechanism according to claim 6, characterized in that, The connector includes a crossbeam, side plates, and a mounting bracket. The mounting bracket is installed on the movable base. One end of each of the two side plates is fixedly connected to the horizontal sides of the mounting bracket, and the other end of each side plate is connected to both ends of the crossbeam. The crossbeam is fixedly connected to the sensing block.

8. The stepper motor mechanism according to claim 7, characterized in that, The crossbeam is horizontally positioned between the two side plates, and a connecting hole is provided at the center of the crossbeam for fixing the sensing block to the side away from the detection ruler.

9. A calibration device, characterized in that, The calibration device includes a stepper motor mechanism as described in any one of claims 1 to 8; as well as A crossbeam, on which the stepper motor mechanism is mounted; Base; A column is vertically mounted on the base, and a crossbeam is installed on the column.

10. A calibration system, characterized in that, The calibration system includes the calibration device as described in claim 9; and A diagnostic instrument, which is communicatively connected to the calibration device.

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