Stepping motor mechanism, calibration equipment and calibration system

Abstract

The invention relates to the technical field of industrial equipment, and discloses a stepping motor mechanism, calibration equipment and a calibration system.The stepping motor mechanism comprises a motor, a driving assembly and a detection assembly; the driving assembly comprises a lead screw and a nut, the lead screw is in transmission connection with a rotating shaft of the motor, the nut is arranged on the lead screw in a sleeving mode, and the nut is configured to move along the rotating axis of the lead screw when the motor drives the lead screw to rotate; the detection assembly comprises a connecting piece, an induction block and a detection ruler, one end of the connecting piece is connected to the nut, the other end of the connecting piece is connected with the induction block, the detection ruler is arranged on the motor, the induction block is slidably arranged on the detection ruler along with movement of the nut, and the detection ruler is configured to be capable of detecting the position of the induction block relative to the detection ruler. The position of the nut can be deduced and determined through the position of the induction block relative to the detection ruler, and then the movement position of a workpiece connected with the nut is determined. Therefore, the detection assembly and the motor driving assembly are integrated, and the motor mechanism is simplified.

Description

Technical Field

[0001] The present application relates to the technical field of industrial equipment, and in particular to a stepper motor mechanism, calibration equipment and calibration system. Background Art

[0002] A stepper motor is an electric motor that converts electrical pulse signals into corresponding angular displacement or linear displacement. Each time a pulse signal is input, the rotor rotates an angle or moves forward one step. The output angular displacement or linear displacement is proportional to the number of input pulses, and the speed is proportional to the pulse frequency.

[0003] The traditional stepper motor consists of two parts: one is the motor screw drive assembly, which is used to drive the workpiece to move, and the other is the detection switch assembly, which is used to detect the position of the workpiece, making the overall structure of the stepper motor very bloated. Summary of the invention

[0004] The present application aims to provide a stepper motor mechanism to solve the technical problem of the bloated overall structure of the stepper motor in the prior art.

[0005] The embodiment of the present application solves the technical problem by adopting the following technical solutions:

[0006] A stepper motor mechanism is provided, characterized in that it comprises:

[0007] Motor;

[0008] A drive assembly, comprising a screw and a nut, wherein the screw is drivingly connected to the rotating shaft of the motor, the nut is sleeved on the screw, and the nut is configured to move along the rotation axis of the screw when the motor drives the screw to rotate;

[0009] The detection component includes a connecting member, a sensing block and a detection ruler, wherein 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 ruler is arranged on the motor, and the sensing block is slidably arranged on the detection ruler following the movement of the nut. The detection ruler is configured to detect the position of the sensing block relative to the detection ruler.

[0010] Through the above structure, the sensing block is connected to the nut through a connecting piece, and the nut is sleeved on the screw rod. Therefore, when the motor drives the screw rod to rotate and the nut moves along the screw rod, the sensing block is driven to move synchronously on the detection ruler. At this time, the detection ruler can detect the position of the sensing block relative to the detection ruler. Therefore, the position of the nut can be deduced and determined by the position of the sensing block relative to the detection ruler, and then the movement position of the workpiece connected to the nut can be determined. In this way, the detection component and the motor drive component are integrated into one, simplifying the motor mechanism.

[0011] In some embodiments, the detection assembly further 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.

[0012] Through the above structure, the fixed base, the mounting platform and the detection ruler can be installed together to realize the integration of the detection component and the motor. At the same time, the detection ruler is set on the motor through the fixed base and the mounting platform, which can effectively utilize the space on the upper side of the motor and effectively reduce the weight and space occupancy of the motor mechanism.

[0013] In some embodiments, two sliding guide rails are provided on the mounting platform, and the two sliding guide rails are respectively provided on both sides of the mounting platform along the rotation axis of the screw rod, and the opposite sides of the sensing block are respectively abutted against the sliding guide rails, and the sensing block is configured to be able to slide on the detection ruler along the sliding guide rails.

[0014] Through the above structure, the two opposite sides of the sensing block are respectively in contact with the sliding guide rails, and the sliding guide rails limit the movement of the sensing block, so that the sensing block can only move along the rotation axis of the screw rod, avoiding lateral movement of the sensing block, thereby improving the stability of the sensing block when moving.

[0015] In some embodiments, the two sliding guide rails are respectively provided with oppositely arranged mounting grooves, the mounting grooves penetrate the sliding guide rails along the rotation axis of the screw rod, and the opposite sides of the detection ruler are respectively clamped in the two mounting grooves.

[0016] Through the above structure, the installation grooves in the guide rail are used to install the detection ruler, and the two ends of the detection ruler are clamped in the two installation grooves, so that the detection ruler can be stably installed. At the same time, the two installation grooves are arranged relative to each other, which can facilitate the positioning of the detection ruler and improve the accuracy of the installation of the detection ruler.

[0017] In some embodiments, the two sliding guide rails are respectively provided with sliding grooves which are arranged opposite to each other and are arranged parallel to the mounting grooves. A sliding plate is arranged at the bottom of the sensing block, and both ends of the sliding plate are clamped in the sliding grooves.

[0018] Through the above structure, the sliding groove is used to further limit the position of the sensing block. By clamping the sliding plate at the bottom of the sensing block, in addition to limiting the lateral movement of the sensing block, the up and down movement of the sensing block can also be limited, thereby ensuring that the sensing block can only move forward and backward along the direction of the screw rod rotation axis. At the same time, the sliding groove is arranged in parallel with the installation groove, which further ensures the fit between the detection ruler and the sensing block, avoiding detection errors caused by the gap between the sensing block and the detection ruler.

[0019] In some embodiments, the driving assembly further comprises a moving seat, the moving seat is fixedly connected to the nut, the moving seat is passed through the screw rod, and fixed blocks are arranged on opposite sides of the moving seat.

[0020] Through the above structure, the moving seat is fixedly connected to the nut and is inserted into the screw rod, so that the moving seat can move with the nut. At the same time, a fixed block is arranged on the moving seat to provide installation space for external workpiece assembly.

[0021] In some embodiments, the connecting member includes a crossbeam, a side panel and a mounting frame, the mounting frame is installed on the movable seat, one end of the two side panels are respectively fixedly connected to the horizontal sides of the mounting frame, the other ends of the two side panels are connected to the two ends of the crossbeam, and the crossbeam is fixedly connected to the sensing block.

[0022] Through the above structure, the mounting frame is used to fix the connecting part on the movable seat, the crossbeam is used to install the sensing block, and the side plate is used to connect the two, so that when the motor drives the nut to move along the screw rod, the movable seat drives the mounting frame, the side plate and the crossbeam, and then drives the sensing block to move synchronously, thereby realizing the corresponding relationship between the position of the sensing block and the nut.

[0023] In some embodiments, the crossbeam is horizontally disposed between the two side plates, and a connecting hole is disposed at the center of the crossbeam for fixing and connecting the side of the sensing block away from the detection ruler.

[0024] Through the above structure, the center of the beam fixes the sensing block through the connecting hole. When the beam drives the sensing block to move, the stress distribution of the sensing block on the beam is more uniform, thereby protecting the beam and effectively improving the service life, and can improve the stability of the sensing block when moving.

[0025] Another embodiment of the present application further provides a vehicle calibration device, including the stepper motor mechanism in the above embodiment; and

[0026] A crossbeam, on which the stepper motor mechanism is mounted;

[0027] Base;

[0028] A column is vertically arranged on the base, and the crossbeam is installed on the column.

[0029] In another embodiment of the present application, a vehicle calibration system is provided, including the vehicle calibration device in the above embodiment; and

[0030] A diagnostic instrument is communicatively connected with the calibration device.

[0031] Compared with the prior art, the induction block is connected to the nut through a connector, and the nut is sleeved on the screw rod. Therefore, when the motor drives the screw rod to rotate and the nut moves along the screw rod, the induction block is driven to move synchronously on the detection ruler. At this time, the detection ruler can detect the position of the induction block relative to the detection ruler. Therefore, the position of the nut can be deduced and determined by the position of the induction block relative to the detection ruler, and then the movement position of the workpiece connected to the nut can be determined. In this way, the detection component and the motor drive component are integrated into one, simplifying the motor mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] One or several embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0033] Figure 1 is a three-dimensional diagram of a stepper motor mechanism provided in one embodiment of the present application;

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

[0035] Figure 3 It is a side schematic diagram of a stepper motor mechanism driving a nut to move provided in an embodiment of the present application;

[0036] Figure 4 It is a three-dimensional schematic diagram of a stepper motor mechanism driving a nut to move provided in an embodiment of the present application;

[0037] Figure 5 This is a front view of a vehicle calibration device in one embodiment of the present application.

[0038] Reference numerals:

[0039] 100. Stepper motor mechanism; 10. Motor;

[0040] 20, driving assembly; 210, screw rod; 220, nut; 230, moving seat; 231, fixing block;

[0041] 30, detection assembly; 310, connecting piece; 311, mounting frame; 312, side plate; 312A, first arc surface; 312B, second arc surface; 313, crossbeam; 313A, connecting hole; 320, sensing block; 321, sliding plate; 330, detection ruler; 331, sensing area; 340, fixed base; 350, mounting table; 351, sliding guide rail; 351A, mounting slot; 351B, sliding slot;

[0042] 200, beam; 300, base; 400, column; 500, machine body; 600, visual camera. DETAILED DESCRIPTION

[0043] In order to facilitate the understanding of the present invention, the present invention is described in more detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that when an element is described as "connecting" another element, it can be directly on another element, or there can be one or more centered elements therebetween. The orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "upper end", "lower end", "top" and "bottom" used in this specification is based on the orientation or positional relationship shown in the accompanying drawings, only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0044] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as those commonly understood by those skilled in the art to which the present invention belongs. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0045] A stepper motor mechanism provided in an embodiment of the present application is described in detail below through specific embodiments in conjunction with all the drawings in the specification.

[0046] See also Figure 1 , Figure 1 1 is a stereogram of a stepper motor mechanism provided by an embodiment of the present application. An embodiment of the present application discloses a stepper motor mechanism, including a motor 10, a driving assembly 20 and a detection assembly 30; the driving assembly 20 includes a screw 210 and a nut 220, the screw 210 is transmission-connected to the rotating shaft of the motor 10, the nut 220 is sleeved on the screw 210, and the nut 220 is configured to move along the rotation axis of the screw 210 when the motor 10 drives the screw 210 to rotate; the detection assembly 30 includes a connecting member 310, a sensing block 320 and a detection ruler 330, one end of the connecting member 310 is connected to the nut 220, the other end of the connecting member 310 is connected to the sensing block 320, the detection ruler 330 is arranged on the motor 10, the sensing block 320 follows the movement of the nut 220 and is slidably arranged on the detection ruler 330, and the detection ruler 330 is configured to be able to detect the position of the sensing block 320 relative to the detection ruler 330.

[0047] Through the above structure, the sensing block 320 is connected to the nut 220 through the connecting member 310, and the nut 220 is sleeved on the screw rod 210, so when the motor 10 drives the screw rod 210 to rotate and the nut 220 moves along the screw rod 210, the sensing block 320 is driven to follow and move synchronously on the detection ruler 330, and the detection ruler 330 can detect the position of the sensing block 320 relative to the detection ruler 330. Therefore, through the position of the sensing block 320 relative to the detection ruler 330, the position of the nut 220 can be deduced and determined, and then the movement position of the workpiece connected to the nut 220 can be determined.

[0048] Specifically, in the embodiment of the present application, the output shaft of the motor 10 is provided with a coupling, and the coupling is related to connecting the output shaft of the motor 10 with the screw 210. The surface of the screw 210 is provided with an external thread, and the inner side of the nut 220 is provided with an internal thread corresponding to the external thread. When the motor 10 drives the output shaft to rotate, the screw 210 rotates with the output shaft, and the nut 220 moves forward and backward along the rotation axis of the screw 210 due to the friction 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 the sensing block 320 can follow the nut 220 and move synchronously on the detection ruler 330. The induction method between the sensing block 320 and the detection ruler 330 can be through resistance, capacitance, magnetic field, infrared, ultrasonic or other methods, which are not limited.

[0049] In a specific application, one side of the driving motor 10 is usually fixed, and the workpiece can be directly or indirectly connected to the nut 220. When the nut 220 moves, the external workpiece is driven to move synchronously with the nut 220.

[0050] In some other embodiments, the moving workpiece can also be connected to one side of the drive rod motor 10, and the position of the nut 220 can be fixed, so that the drive motor 10 moves along the rotation axis of the screw rod 210, thereby driving the external workpiece to move with the drive motor 10.

[0051] See also Figure 2 , Figure 2 is an exploded view of a stepper motor mechanism provided in one embodiment of the present application.

[0052] In some embodiments, the detection assembly 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 . The detection ruler 330 is installed in the mounting platform 350 .

[0053] Through the above structure, the fixed base 340, the mounting platform 350 and the detection ruler 330 can be installed together to realize the integration of the detection assembly 30 and the motor 10. At the same time, the detection ruler 330 is set on the motor 10 through 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.

[0054] In the prior art, the stepper motor 10 mechanism usually includes two independent parts, namely, the detection component 30 and the motor 10 driving component 20, so the overall structure of the stepper motor 10 mechanism is relatively large and bloated. In the embodiment of the present application, the detection component 30 directly mounts the detection ruler 330 to the upper side of the motor 10 through the fixed base 340 and the mounting platform 350, and the induction block 320 follows the movement of the nut 220 and moves on the surface of the detection ruler 330 (i.e., the upper side of the motor 10), so that the detection component 30 and the motor 10 driving component 20 are integrated into one mechanism.

[0055] Specifically, in the embodiment of the present application, the fixed base 340 is a rectangular parallelepiped structure, and the fixed base 340 extends outward on one side close to the bearing seat of the motor 10, and the extended portion is also buckled with the bearing seat of the motor 10, and the extended portion is provided with a mounting hole, which is used to assemble a connecting member 310 such as a bolt or a pin to connect the end of the fixed base 340 close to the bearing seat to the bearing seat of the motor 10. The other end of the fixed base 340 away from the bearing seat of the motor 10 extends on opposite sides in the horizontal direction, and the extended portion is also provided with a mounting hole (not marked in the figure) to connect the end of the fixed base 340 away from the bearing seat to the housing of the motor 10. In this way, the fixed base 340 is connected to the motor 10.

[0056] The mounting platform 350 is used to load the detection ruler 330. The mounting platform 350 is a rectangular parallelepiped structure as a whole, and a receiving cavity (not shown) may be provided inside to facilitate the installation or routing of the detection ruler 330. The mounting platform 350 is provided on the upper side of the fixed base 340. The mounting platform 350 may be connected to the fixed base 340 by a connecting member 310 such as a bolt, or the mounting platform 350 may be provided as an integral part of the fixed base 340, which is not limited thereto.

[0057] Please refer to Figure 1 and Figure 2 In some embodiments, two sliding guide rails 351 are provided on the mounting platform 350. The two sliding guide rails 351 are respectively provided on both sides of the mounting platform 350 along the rotation axis of the screw rod 210. The opposite sides of the sensing block 320 are respectively abutted against the sliding guide rails 351. The sensing block 320 is configured to be able to slide on the detection ruler 330 along the sliding guide rails 351.

[0058] Through the above structure, the two opposite sides of the sensing block 320 are respectively abutted against the sliding guide rails 351, and the sliding guide rails 351 limit the movement of the sensing block 320, so that the sensing block 320 can only move along the rotation axis direction of the screw rod 210, avoiding the lateral movement of the sensing block 320, thereby improving the stability of the sensing block 320 when moving.

[0059] Specifically, in the embodiment of the present application, the sliding guide rail 351 is in a strip-shaped structure, and the sliding guide rail 351 is arranged on one side of the mounting platform 350 close to the bearing seat of the motor 10, and 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 sensor block 320, as long as the length of the sliding guide rail 351 is greater than the stroke length of the sensor block 320.

[0060] 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 screw rod 210, and the opposite sides of the detection ruler 330 are respectively clamped in the two mounting grooves 351A.

[0061] Through the above structure, the installation groove 351A provided in the guide rail is used to install the detection ruler 330. The two ends of the detection ruler 330 are clamped in the two installation grooves 351A, so that the detection ruler 330 can be stably installed. At the same time, the two installation grooves 351A are arranged relative to each other, which can facilitate the positioning of the detection ruler 330 and improve the accuracy of the installation of the detection ruler 330.

[0062] Specifically, in the embodiment of the present application, the mounting grooves 351A include two, which are respectively arranged at the bottom of the two sliding guide rails 351, and the width of the mounting grooves 351A is consistent with the height of the detection ruler 330, so that the detection ruler 330 can be just clamped in the mounting grooves 351A. The two mounting grooves 351A are relatively horizontally arranged, and when the detection ruler 330 is clamped in the mounting grooves 351A, the detection ruler 330 can also be positioned by the mounting grooves 351A, and the horizontal arrangement is achieved to ensure that the distance between the detection ruler 330 and the sensor block 320 is constant.

[0063] In some embodiments, the two sliding guide rails 351 are respectively provided with sliding grooves 351B arranged opposite to each other, and the sliding grooves 351B are arranged parallel to the mounting grooves 351A. A sliding plate 321 is arranged at the bottom of the sensing block 320, and both ends of the sliding plate 321 are clamped in the sliding grooves 351B.

[0064] 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, in addition to limiting the lateral movement of the sensing block 320, the up and down movement of the sensing block 320 can also be limited, thereby ensuring that the sensing block 320 can only move forward and backward along the rotation axis direction of the screw rod 210. At the same time, the sliding groove 351B is arranged in parallel with the installation groove 351A, which further ensures that the distance between the detection ruler 330 and the sensing block 320 is constant, avoiding detection errors caused by the gap between the sensing block 320 and the detection ruler 330.

[0065] Specifically, in the embodiment of the present application, the sliding groove 351B is arranged above the mounting groove 351A, and the two sliding grooves 351B are arranged horizontally with the mounting groove 351A. The two sliding grooves 351B are also arranged relatively horizontally, and are also used to position the sensing block 320 and ensure the fit between the sensing block 320 and 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 setting of the sliding plate 321 can assist the sensing block 320 to move on the detection ruler 330, and also plays a role in protecting the sensing block 320.

[0066] Please refer to Figure 2 and Figure 3 , Figure 3 Schematic diagram of a stepper motor mechanism driving a nut to move provided in an embodiment of the present application. In some embodiments, the driving assembly 20 further includes a moving seat 230, the moving seat 230 is fixedly connected to the nut 220, the moving seat 230 is passed through the screw rod 210, and fixed blocks 231 are provided on opposite sides of the moving seat 230.

[0067] Through the above structure, the movable seat 230 is fixedly connected to the nut 220 and is passed through the screw rod 210, so that the movable seat 230 can move with the nut 220. At the same time, a fixed block 231 is arranged on the movable seat 230 to provide installation space for external workpiece assembly.

[0068] Specifically, the movable seat 230 is a rectangular parallelepiped structure, and a threaded through hole is provided in the movable seat 230 to be sleeved on the screw rod 210. The movable seat 230 is also provided with three connecting holes corresponding to the nut 220, and the connecting holes are used to set bolts to connect the movable seat 230 with the nut 220. The movable seat 230 is provided with a protruding shaft on two opposite sides, and a fixed block 231 is sleeved on the protruding shaft. The fixed block 231 is rotatably connected to the protruding shaft, and the fixed block 231 abuts against an external workpiece. When the nut 220 moves along the screw rod 210, the movable seat 230 moves synchronously. At this time, the fixed block 231 partially abuts against the external workpiece, and the fixed block 231 rotates and pushes the external workpiece to rotate accordingly.

[0069] In some other embodiments, the fixing seat is entirely in contact with the external workpiece, and the fixing block 231 does not rotate but moves in translation with the fixing seat, while pushing the external workpiece to move in translation.

[0070] In some embodiments, the connecting member 310 includes a cross beam 313, a side panel 312 and a mounting frame 311. The mounting frame 311 is installed on the movable seat 230. One end of the two side panels 312 are respectively fixedly connected to the horizontal sides of the mounting frame 311, and the other ends of the two side panels 312 are connected to the two ends of the cross beam 313. The cross beam 313 is fixedly connected to the sensing block 320.

[0071] Through the above structure, the mounting frame 311 is used to fix the connecting member 310 on the movable seat 230, the cross beam 313 is used to install the sensing block 320, and the side plate 312 is used to connect the two, so that when the motor 10 drives the nut 220 to move along the screw rod 210, the movable seat 230 drives the mounting frame 311, the side plate 312 and the cross beam 313, and then drives the sensing block 320 to move synchronously, thereby realizing the corresponding relationship between the position of the sensing block 320 and the nut 220.

[0072] Specifically, one end of the mounting frame 311 close to the nut 220 is bent and attached to the movable seat 230, and two symmetrical connection holes are provided in the bent portion to connect the mounting frame 311 to the movable seat 230 through bolts and other components. The other end of the mounting frame 311 away from the nut 220 extends to opposite sides, and two side panels 312 are respectively connected to the extended portion. The ends of the two side panels 312 away from the mounting frame 311 are respectively connected to the two ends of the crossbeam 313, and the lengths and other specifications of the two side panels 312 are consistent to ensure that the crossbeam 313 is perpendicular to the rotation axis of the screw rod 210. The mounting frame 311, the side panels 312 and the crossbeam 313 can be connected by welding, or they can be integrally formed, which is not limited.

[0073] In some embodiments, the crossbeam 313 is horizontally disposed between the two side panels 312 , and a connecting hole 313A is disposed at the center of the crossbeam 313 for fixing and connecting the side of the sensing block 320 away from the detection ruler 330 .

[0074] Through the above structure, the center of the beam 313 fixes the sensing block 320 through the connecting hole. When the beam 313 drives the sensing block 320 to move, the stress distribution of the sensing block 320 on the beam 313 is more uniform, thereby protecting the beam 313 and effectively improving the service life, and can improve the stability of the sensing block 320 when moving.

[0075] Specifically, two connection holes 313A are symmetrically provided at the center of the crossbeam 313 . The two connection holes 313A are used to set components such as bolts to connect the sensing block 320 to the crossbeam 313 .

[0076] In some embodiments, a first curved surface 312A that is bent downward is provided at one end of the side plate 312 close to the mounting frame 311, and a second curved surface 312B that is bent upward is provided at one end of the side plate 312 close to the cross beam 313, and the portion between the first curved surface 312A and the second curved surface 312B is parallel to the rotation axis of the screw rod 210.

[0077] Through the above structure, the first arc surface 312A and the second arc surface 312B at both ends of the side plate 312 are respectively constructed to bend downward and upward, so as to respectively connect the mounting frame 311 at a lower position relative to the side plate 312 and the higher beam 313, so that the middle part of the side plate 312 can be parallel to the rotation axis of the screw rod 210, so that the side plate 312 is more stable when following the movement.

[0078] Specifically, since the mounting frame 311 is connected to the nut 220 and is at the same or similar height as the drive motor 10, and the detection ruler 330 is arranged on the upper side of the motor 10, the position of the crossbeam 313 located above the detection ruler 330 is obviously higher than the position of the mounting frame 311. Therefore, in order to solve the height difference between the mounting frame 311 and the crossbeam 313, the height difference between the two can be solved by setting a downwardly curved first arc surface 312A and an upwardly curved second arc surface 312B on the side plate 312. At the same time, the part between the first arc surface 312A and the second arc surface 312B is arranged horizontally, which is more stable.

[0079] In some other embodiments, the side panel 312 can also be set as a straight side panel 312 that obliquely connects the beam 313 and the mounting frame 311, or can be set as an L-shaped side panel 312 with a corner. Those skilled in the art can make a choice according to actual needs.

[0080] Please refer to Figure 2 and Figure 4 , Figure 4 3D is a schematic diagram of a stepper motor mechanism driving a nut to move according to an embodiment of the present application. In some embodiments, the detection ruler 330 is provided with a sensing area 331, and the sensing area 331 is configured to detect the position of the sensing block 320, and the sensing block 320 is located within the sensing area 331 following the movement of the nut 220.

[0081] Through the above structure, the sensing area 331 of the detection ruler 330 covers the moving stroke of the sensing block 320, so that the sensing block 320 follows the nut 220 to move to any position. The detection ruler 330 can detect and determine the position of the sensing block 320, thereby detecting any moving position of the nut 220 and the workpiece.

[0082] Specifically, the detection ruler 330 is provided with a detection element in the sensing area 331. The specific type of the detection element has multiple options according to different sensing methods, such as an electrode layer provided with a dielectric. 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.

[0083] See also Figure 5 , Figure 5 It is a front view of a car calibration device in one embodiment of the present application. Another embodiment of the present application also provides a car calibration device, including the stepper motor mechanism 100 in any of the above embodiments, the car calibration device includes a crossbeam 200, a base 300, a column 400 and a machine body 500, wherein the column 400 is vertically arranged on the base 300, and the crossbeam 200 is installed on the column 400. A fine-tuning device (not marked in the figure) is provided on the crossbeam 200, and the fine-tuning device is connected to the visual camera 600 for calibrating the car. The stepper motor mechanism 100 is arranged in the fine-tuning device to adjust the posture of the visual camera 600 and improve the calibration accuracy.

[0084] In another embodiment of the present application, a vehicle calibration system is provided, comprising the vehicle calibration device and the diagnostic instrument in the above embodiment, wherein the diagnostic instrument is communicatively connected to the vehicle calibration device. The diagnostic instrument may be a flat-panel diagnostic instrument for easy carrying and transportation, and the diagnostic instrument is communicatively connected to the AVM laser instrument to receive vehicle image data captured by the AVM laser instrument. Optionally, the calibration system may also include calibration elements such as targets, reflectors, and lasers.

[0085] In summary, in the stepper motor 10 mechanism provided by the embodiment of the present application, the sensing block 320 is connected to the nut 220 through the connecting piece 310, and the nut 220 is sleeved on the screw rod 210, so that when the motor 10 drives the screw rod 210 to rotate and the nut 220 moves along the screw rod 210, the sensing block 320 is driven to follow the synchronous movement on the detection ruler 330, and at this time, the detection ruler 330 can detect the position of the sensing block 320 relative to the detection ruler 330. Therefore, through the position of the sensing block 320 relative to the detection ruler 330, the position of the nut 220 can be derived and determined, and then the movement position of the workpiece connected to the nut 220 can be determined. At the same time, by installing the detection ruler 330 on the upper side of the motor 10 and connecting the sensing block 320 to the nut 220 through the connecting piece 310, the detection component 30 and the motor 10 drive component 20 are integrated into one, and the motor 10 mechanism is simplified.

[0086] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Under the idea of ​​the present invention, the technical features in the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other changes in different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity. Although the present invention is described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the above embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A stepper motor mechanism, characterized in that: include: Motor; A drive assembly, comprising a screw and a nut, wherein the screw is drivingly connected to the rotating shaft of the motor, the nut is sleeved on the screw, and the nut is configured to move along the rotation axis of the screw when the motor drives the screw to rotate; The detection component includes a connecting member, a sensing block and a detection ruler, wherein 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 ruler is arranged on the motor, and the sensing block is slidably arranged on the detection ruler following the movement of the nut. 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 further includes a fixed base and a mounting platform, wherein the fixed base is disposed on the motor, the mounting platform is fixedly connected to the fixed base, and the detection ruler is mounted in the mounting platform.

3. The stepper motor mechanism according to claim 2, characterized in that: Two sliding guide rails are arranged on the mounting platform, and the two sliding guide rails are respectively arranged on both sides of the mounting platform along the rotation axis of the screw rod. The opposite sides of the sensing block are respectively abutted against the sliding guide rails, and the sensing block is configured to be able to slide on the detection ruler along the sliding guide rails.

4. The stepper motor mechanism according to claim 3, characterized in that: The two sliding guide rails are respectively provided with mounting grooves which are arranged opposite to each other. The mounting grooves penetrate the sliding guide rails along the rotation axis of the screw rod. The opposite sides of the detection ruler are respectively clamped in the two mounting grooves.

5. The stepper motor mechanism according to claim 4, characterized in that: The two sliding guide rails are respectively provided with sliding grooves which are arranged opposite to each other and are arranged parallel to the mounting grooves. A sliding plate is arranged at the bottom of the sensing block, and both ends of the sliding plate are clamped in the sliding grooves.

6. The stepper motor mechanism according to claim 1, characterized in that: The driving assembly also includes a moving seat, which is fixedly connected to the nut and penetrates the screw rod. Fixed blocks are arranged on opposite sides of the moving seat.

7. The stepper motor mechanism according to claim 6, characterized in that: The connecting member includes a crossbeam, a side plate and a mounting frame, wherein the mounting frame is mounted on the movable seat, one end of the two side plates are respectively fixedly connected to the horizontal sides of the mounting frame, and the other ends of the two side plates are connected to the two ends of the crossbeam, and 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 arranged between the two side plates, and a connecting hole is arranged at the center of the crossbeam for fixing and connecting the side of the sensing block away from the detection ruler.

9. A calibration device, characterized in that: The calibration device comprises a stepper motor mechanism as claimed 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 arranged on the base, and the crossbeam is installed on the column.

10. A calibration system, characterized in that: The calibration system comprises the calibration device according to claim 9; and A diagnostic instrument is communicatively connected with the calibration device.

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