Stepping motor testing mechanism

Abstract

The utility model belongs to the technical field of motor detection, and discloses a stepping motor testing mechanism, which comprises a bearing assembly, a guide rod, a mounting plate, a plurality of weights, a nut piece and a detection assembly, the guide rod is installed on the bearing assembly in the horizontal direction. The mounting plate slidably sleeves the periphery of the guide rod in the horizontal direction; the plurality of weights are selectively mounted on the mounting plate; the nut piece is mounted on the mounting plate and is in threaded transmission connection with a screw rod of the stepping motor; the detection assembly is used for detecting displacement of the mounting plate. A plurality of weights are installed on an installation plate, a stepping motor is started, the stepping motor drives a nut piece and the installation plate through a screw rod, a detection assembly detects the displacement of the installation plate, if the stepping motor has an out-of-step phenomenon, the actual displacement value of the installation plate is smaller than the theoretical displacement value, and if the stepping motor does not have the out-of-step phenomenon, the actual displacement value of the installation plate is smaller than the theoretical displacement value. The actual displacement value of the mounting plate is equal to the theoretical displacement value.

Description

Technical Field

[0001] This utility model relates to the field of motor testing technology, and in particular to a stepper motor testing mechanism. Background Technology

[0002] In zoom lenses, the output end of the stepper motor has a screw, which is connected to a movable lens group. The stepper motor drives the movable lens group through the screw, thereby achieving zoom. The driving accuracy of the stepper motor is affected by the step angle and the performance of the driver, and cumulative errors may exist. When the stepper motor loses steps, it seriously affects the focusing accuracy of the lens. Most existing detection devices are used to detect the vibration of the screw. For example, application number 202323588410.6, entitled "Motor Vibration Detection Device," uses a test paper attached to the motor screw. When the motor screw rotates, the detection mechanism detects the vibration amplitude of the test paper, and the vibration amplitude of the test paper provides feedback on the vibration amplitude of the motor screw. However, this method cannot be used to detect whether the stepper motor has lost steps. Utility Model Content

[0003] The purpose of this invention is to provide a stepper motor testing mechanism, which uses a nut component to connect with the screw thread of the stepper motor, and uses a detection component to detect the displacement of the mounting plate, thereby determining whether the stepper motor has a step loss phenomenon.

[0004] To achieve this objective, the present invention adopts the following technical solution:

[0005] Stepper motor testing equipment includes:

[0006] Carrier component;

[0007] The guide rod is installed horizontally on the load-bearing assembly;

[0008] The mounting plate is slidably fitted around the periphery of the guide rod in the horizontal direction;

[0009] Several weights are selectively installed on the mounting plate;

[0010] A nut is mounted on the mounting plate and is connected to the screw of the stepper motor via a threaded transmission.

[0011] A detection component is used to detect the displacement of the mounting plate.

[0012] As an optional technical solution, the stepper motor testing mechanism further includes a bearing wheel and a pull rope. The bearing wheel is installed on the bearing assembly, the pull rope passes around the periphery of the bearing wheel, one end of the pull rope is connected to the mounting plate, and several weights are selectively suspended from the other end of the pull rope.

[0013] As an optional technical solution, the guide rod is provided with the bearing wheel at both the front and rear ends along its length, and the pull rope connected to the weight selectively passes around the periphery of one of the bearing wheels.

[0014] As an optional technical solution, the load-bearing wheel is rotatably mounted on the load-bearing assembly around a horizontal line.

[0015] As an optional technical solution, the mounting plate is provided with a through hole, and one end of the pull rope passes through the through hole and is tied to the mounting plate.

[0016] As an optional technical solution, the mounting plate is provided with a magnet, and several weights are selectively placed on the mounting plate, with the magnet attracting the weights.

[0017] As an optional technical solution, the upper surface of the mounting plate is provided with a receiving groove, the magnet is placed in the receiving groove, and the upper surface of the magnet is not higher than the upper surface of the mounting plate.

[0018] As an optional technical solution, the guide rod is provided as two rods, which are arranged in parallel and pass through the mounting plate simultaneously.

[0019] As an optional technical solution, the nut includes a transmission end and a mounting end. The mounting end is fixedly installed on the mounting plate. The transmission end is provided with an opening groove, and the inner wall of the opening groove is provided with transmission teeth. The screw passes through the opening groove and is threadedly connected to the transmission end.

[0020] As an optional technical solution, the support assembly includes a support platform, the stepper motor is mounted on the support platform, a socket is provided on one side of the support platform, the socket is provided with a pin, and the pin is electrically connected to the stepper motor.

[0021] The beneficial effects of this utility model are:

[0022] The stepper motor testing mechanism provided by this utility model includes a load-bearing component, a guide rod, a mounting plate, several weights, a nut, and a detection component. The guide rod is installed horizontally on the load-bearing component. The mounting plate is slidably sleeved around the guide rod in the horizontal direction. Several weights are selectively installed on the mounting plate. The nut is installed on the mounting plate and is threadedly connected to the screw of the stepper motor. The detection component is used to detect the displacement of the mounting plate.

[0023] Several weights are installed on the mounting plate. The stepper motor is started, and the stepper motor drives the nut and mounting plate through the screw. The detection component detects the displacement of the mounting plate. If the stepper motor loses steps, the actual displacement of the mounting plate is less than the theoretical displacement. If the stepper motor does not lose steps, the actual displacement of the mounting plate is equal to the theoretical displacement. If it is necessary to further test the load capacity of the stepper motor, the number of weights is increased until the detection component detects that the actual displacement of the mounting plate is less than the theoretical displacement, then it is determined that the stepper motor has reached its load capacity limit. Attached Figure Description

[0024] Figure 1 This is a first-view structural schematic diagram of the stepper motor testing mechanism of this utility model;

[0025] Figure 2 This is a second-view structural schematic diagram of the stepper motor testing mechanism of this utility model;

[0026] Figure 3 yes Figure 2 A magnified view of a portion of position A in the middle;

[0027] Figure 4 This is a schematic diagram of the mounting plate of this utility model;

[0028] Figure 5 This is a structural schematic diagram of the nut component of this utility model.

[0029] In the picture:

[0030] 1. Supporting component; 11. Support platform; 12. Socket;

[0031] 2. Guide rod;

[0032] 3. Mounting plate; 31. Through hole; 32. Receiving groove;

[0033] 4. Nut component; 41. Transmission end; 411. Opening slot; 412. Transmission gear; 42. Mounting end;

[0034] 5. Detection components;

[0035] 6. Load-bearing wheels;

[0036] 7. Magnet. Detailed Implementation

[0037] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0038] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0039] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0040] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0041] like Figures 1 to 5 As shown, this embodiment provides a stepper motor testing mechanism, which includes a load-bearing component 1, a guide rod 2, a mounting plate 3, several weights, a nut 4, and a detection component 5. The guide rod 2 is mounted horizontally on the load-bearing component 1. The mounting plate 3 is slidably sleeved on the periphery of the guide rod 2 in a horizontal direction. Several weights are selectively mounted on the mounting plate 3. The nut 4 is mounted on the mounting plate 3 and is threadedly connected to the screw of the stepper motor. The detection component 5 is used to detect the displacement of the mounting plate 3.

[0042] Several weights are installed on the mounting plate 3. The stepper motor is started, and the stepper motor drives the nut 4 and the mounting plate 3 through the screw. The detection component 5 detects the displacement of the mounting plate 3. If the stepper motor loses steps, the actual displacement value of the mounting plate 3 is less than the theoretical displacement value. If the stepper motor does not lose steps, the actual displacement value of the mounting plate 3 is equal to the theoretical displacement value. If it is necessary to further test the load capacity of the stepper motor, the number of weights is increased until the detection component 5 detects that the actual displacement value of the mounting plate 3 is less than the theoretical displacement value. Then it is determined that the stepper motor has reached its load capacity limit.

[0043] The detection component 5 is an existing displacement sensor, and its specific working principle will not be described in detail in this embodiment.

[0044] Optionally, the stepper motor testing mechanism also includes a bearing wheel 6 and a pull rope. The bearing wheel 6 is installed on the bearing assembly 1, and the pull rope passes around the periphery of the bearing wheel 6. One end of the pull rope is connected to the mounting plate 3, and several weights are selectively suspended at the other end of the pull rope.

[0045] The stepper motor is horizontally mounted on the bearing assembly 1, so that the screw extends in the horizontal direction. When it is necessary to apply an axial load to the screw, several weights are suspended at the other end of the pull rope. The weights apply a vertical downward force to the pull rope. Guided by the bearing wheel 6, the pull rope applies a horizontal tension to the mounting plate 3. The mounting plate 3 applies an axial load to the screw through the nut 4. This allows for the detection of stepper motor step loss and load capacity when the screw is subjected to an axial load.

[0046] In this embodiment, the guide rod 2 is provided with bearing wheels 6 at both the front and rear ends along its length, and the pull rope connected to the weight selectively passes around the periphery of one of the bearing wheels 6.

[0047] When the stepper motor drives the screw to rotate in the forward direction, the screw causes the nut 4 and mounting plate 3 to move towards one of the bearing wheels 6. When the stepper motor drives the screw to rotate in the reverse direction, the screw causes the nut 4 and mounting plate 3 to move towards the other bearing wheel 6. By selectively arranging the positions of the weights, the stepper motor's step loss phenomenon and load capacity during forward and reverse rotation can be detected.

[0048] Optionally, the load-bearing wheel 6 is mounted on the load-bearing assembly 1 and rotates around a horizontal line. The mounting plate 3 slides on the guide rod 2, and the pull rope slides over the surface of the load-bearing wheel 6. Since the load-bearing wheel 6 can rotate, the friction between the pull rope and the load-bearing wheel 6 can be reduced, thus extending the service life of the pull rope.

[0049] Optionally, the mounting plate 3 is provided with a through hole 31, through which one end of the pull rope passes and is tied to the mounting plate 3.

[0050] Optionally, the mounting plate 3 is equipped with a magnet 7, and several weights are selectively placed on the mounting plate 3, with the magnet 7 attracting the weights.

[0051] When testing the stepper motor, the weights on the pull rope can be removed and several weights placed on the mounting plate 3. The magnet 7 is used to attract the weights and prevent them from falling. When the weights are placed on the mounting plate 3, the guide rod 2 supports the mounting plate 3 and the weights. After the stepper motor is started, the screw applies a pushing or pulling force to the nut 4.

[0052] Optionally, the upper surface of the mounting plate 3 is provided with a receiving groove 32, and the magnet 7 is placed in the receiving groove 32. The upper surface of the magnet 7 is not higher than the upper surface of the mounting plate 3 to prevent the weight from being lifted by the magnet 7 and to ensure the stability of the weight on the mounting plate 3.

[0053] Optionally, there are two guide rods 2, which are arranged in parallel and pass through the mounting plate 3 at the same time to prevent the mounting plate 3 from rotating around the guide rods 2.

[0054] Optionally, the nut component 4 includes a transmission end 41 and a mounting end 42. The mounting end 42 is fixedly mounted on the mounting plate 3. The transmission end 41 has an opening groove 411, and the inner wall of the opening groove 411 has transmission teeth 412. The screw passes through the opening groove 411 and is threadedly connected to the transmission end 41. The screw can slide directly into or out of the opening groove 411.

[0055] The mounting plate 3 has a mounting opening on one side, a connecting hole on the side wall of the mounting opening, and a threaded hole on the mounting end 42. The mounting end 42 is inserted into the mounting opening of the mounting plate 3, and the threaded fastener passes through the connecting hole of the mounting plate 3 and the threaded hole of the mounting end 42, thereby locking the mounting end 42 to the mounting plate 3 and preventing the nut 4 from loosening.

[0056] Optionally, both the upper and lower sidewalls of the opening slot 411 are provided with transmission teeth 412, and the transmission teeth 412 are straight teeth.

[0057] Optionally, the support assembly 1 includes a support platform 11, on which a stepper motor is mounted. A socket 12 is provided on one side of the support platform 11, and the socket 12 has pins that are electrically connected to the stepper motor. The pins include power pins and signal pins; the power pins provide power to the stepper motor, and the signal pins provide control signals to the stepper motor.

[0058] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A stepper motor testing mechanism, characterized in that, include: Carrier component (1); Guide rod (2) is installed horizontally on the bearing assembly (1); Mounting plate (3) is slidably sleeved around the guide rod (2) in the horizontal direction; Several weights are selectively installed on the mounting plate (3); Nut (4) is installed on the mounting plate (3) and is connected to the screw thread of the stepper motor. The detection component (5) is used to detect the displacement of the mounting plate (3).

2. The stepper motor testing mechanism according to claim 1, characterized in that, The stepper motor testing mechanism also includes a bearing wheel (6) and a pull rope. The bearing wheel (6) is installed on the bearing assembly (1). The pull rope passes around the periphery of the bearing wheel (6). One end of the pull rope is connected to the mounting plate (3). Several weights are selectively suspended at the other end of the pull rope.

3. The stepper motor testing mechanism according to claim 2, characterized in that, The guide rod (2) has a bearing wheel (6) at both ends along its length, and the pull rope connected to the weight selectively passes around the periphery of one of the bearing wheels (6).

4. The stepper motor testing mechanism according to claim 2, characterized in that, The load-bearing wheel (6) is mounted on the load-bearing assembly (1) and rotates around a horizontal line.

5. The stepper motor testing mechanism according to claim 2, characterized in that, The mounting plate (3) is provided with a through hole (31), and one end of the pull rope passes through the through hole (31) and is tied to the mounting plate (3).

6. The stepper motor testing mechanism according to claim 1, characterized in that, The mounting plate (3) is provided with a magnet (7), and several weights are selectively placed on the mounting plate (3), and the magnet (7) attracts the weights.

7. The stepper motor testing mechanism according to claim 6, characterized in that, The upper surface of the mounting plate (3) is provided with a receiving groove (32), and the magnet (7) is placed in the receiving groove (32). The upper surface of the magnet (7) is not higher than the upper surface of the mounting plate (3).

8. The stepper motor testing mechanism according to claim 1, characterized in that, The guide rod (2) is provided as two rods, which are arranged in parallel and pass through the mounting plate (3) at the same time.

9. The stepper motor testing mechanism according to claim 1, characterized in that, The nut component (4) includes a transmission end (41) and a mounting end (42). The mounting end (42) is fixedly mounted on the mounting plate (3). The transmission end (41) is provided with an opening groove (411). The inner wall of the opening groove (411) is provided with transmission teeth (412). The screw passes through the opening groove (411) and is threadedly connected to the transmission end (41).

10. The stepper motor testing mechanism according to claim 1, characterized in that, The support assembly (1) includes a support platform (11), the stepper motor is mounted on the support platform (11), and a socket (12) is provided on one side of the support platform (11). The socket (12) is provided with a pin, and the pin is electrically connected to the stepper motor.

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