A micro high-speed motor rotating direction detection device

Abstract

The utility model provides a kind of micro high-speed motor rotating direction detection device, including rotary head module, it contains detachably connected in the rotating body of motor output end and the visual indicating member connected with the rotating body;Wherein, the visual indicating member is configured as when motor is powered off, using the inertial moment of rotating body to drive the visual indicating member continuous low-speed rotation, the rotating direction of the visual indicating member is indirectly judged by observation. The micro high-speed motor rotating direction detection device, by inertia coupling design of rotating body and visual indicating member, in the moment of motor power-off, the high-speed rotation of >25000rpm is converted into the continuous low-speed rotation of visual indicating member, so that the rotating direction can be clearly identified by naked eye, completely solve the problem of visual failure caused by micro high-speed motor due to excessive speed.

Description

Technical Field

[0001] This utility model relates to the field of motor testing technology, specifically to a device for detecting the rotation direction of a micro-high-speed motor. Background Technology

[0002] For micro high-speed motors (rated speed ≥ 20000 rpm), it is necessary to verify whether the rotation direction meets the defined requirements during assembly and adjustment testing. Since the speed far exceeds the limit of visual perception (> 25000 rpm), direct visual inspection is completely ineffective. The current mainstream solution is to capture the direction of rotation using high-speed camera equipment while the motor is rotating. However, this solution has insurmountable drawbacks: close-range shooting during high-speed rotation poses risks of equipment damage and personnel safety, and the complex image processing system significantly increases testing costs and time.

[0003] The aforementioned shortcomings stem from a fundamental contradiction between high rotational speed and visibility: directional information must be acquired while the vehicle is rotating, but high-speed dynamics make safe observation impossible. Existing technologies have failed to provide a mechanical solution that can continue displaying the rotation direction even after power failure, representing a long-standing technological gap in this field. Utility Model Content

[0004] This invention proposes a micro-high-speed motor rotation direction detection device, which solves the dual technical obstacles of visual inspection failure due to excessive speed and the risk of live observation in the prior art.

[0005] The technical solution of this utility model is implemented as follows:

[0006] A micro-high-speed motor rotation direction detection device includes a rotating probe module, which comprises a rotating body detachably connected to the output end of the motor and a visual indicator connected to the rotating body; wherein, the visual indicator is configured to be driven to rotate continuously at low speed by the inertial torque of the rotating body when the motor is powered off, and the rotation direction of the motor is indirectly determined by observing the rotation direction of the visual indicator.

[0007] Furthermore, a bearing is provided between the rotating body and the visual indicator, with the inner ring of the bearing fixed to the rotating body and the outer ring connected to the visual indicator.

[0008] Furthermore, the rotating body is a tensioning bushing with a stepped structure, and a retaining ring is provided on the axial side of the stepped structure to limit the bearing.

[0009] Furthermore, the visual indicator is provided with a counterweight pin for dynamic balance adjustment on the side away from the rotating body.

[0010] Furthermore, the visual indicator is a sheet / strip structure that is wider at the bottom and narrower at the top, and its plane of rotation is perpendicular to the motor axis.

[0011] Furthermore, it also includes a base, on which a horizontally fixed quick-change clamp is provided, the horizontal clamping action of which causes the clamping end to press against the tail section of the motor.

[0012] Furthermore, the clamping end of the horizontal fixed quick-change clamp is detachably equipped with a pressure head.

[0013] Furthermore, the base is also provided with a support module on the side away from the horizontally fixed quick-change clamp, and the support module is provided with a V-shaped groove for horizontally positioning the motor.

[0014] Furthermore, a side positioning plate is detachably installed on one side of the support module. The top of the side positioning plate has a U-shaped groove. The motor output side abuts against the side of the side positioning plate and its output end passes through the U-shaped groove.

[0015] The beneficial effects of the technical solution provided in this application are as follows:

[0016] 1. This micro-high-speed motor rotation direction detection device, through the inertial coupling design of the rotating body and the visual indicator, converts the high-speed rotation of >25000rpm into the continuous low-speed rotation of the visual indicator at the moment of motor power failure, so that the rotation direction can be clearly identified by the naked eye, and completely solves the problem of visual failure caused by excessive speed of micro-high-speed motor.

[0017] 2. This micro-high-speed motor rotation direction detection device utilizes the characteristic of continued release of mechanical energy after power failure. The operator can observe the rotation direction of the visual indicator only after the motor has completely stopped receiving power. This fundamentally avoids the risk of equipment damage and personal injury from close-range observation under high-speed rotation conditions, while also eliminating the cost of using complex protection systems such as high-speed cameras. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the rotating probe module of this utility model;

[0020] Figure 2 This is a schematic diagram of the micro-high-speed motor rotation direction detection device of this utility model;

[0021] Figure 3 This is a schematic diagram of the rotating body of this utility model;

[0022] Figure 4 This is an exploded view of the support base module and the side positioning plate of this utility model.

[0023] In the diagram: 100 base, 10 rotary probe module, 11 rotating body, 12 visual indicator, 13 bearing, 14 shaft retaining ring, 15 counterweight pin; 20 horizontal fixed quick-change fixture, 21 pressure head; 30 support base module, 31 V-groove, 32 side positioning plate, 33 U-groove. Detailed Implementation

[0024] The technical solution of this utility model will be clearly and completely described below with reference to its embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0025] Reference Figure 1-4 A micro-high-speed motor rotation direction detection device includes a rotating probe module 10, which comprises a rotating body 11 detachably connected to the motor output end. The rotating body 11 captures all the rotational kinetic energy of the motor output end through the detachable connection and continuously releases inertial torque using its high rotational inertia after power failure. A visual indicator 12 is connected to the rotating body 11. The visual indicator 12 is driven to rotate by this inertial torque. Through its specific shape design, it increases air resistance, rapidly reducing the rotational speed to a range perceptible to the human eye (<500 rpm), ultimately providing a basis for direction determination through a visual rotation trajectory. When the motor stops due to power failure, the rotating body 11 maintains a high-speed rotation due to inertia, driving the visual indicator 12 to rotate synchronously. At this time, the visual indicator 12 generates a reverse torque due to air resistance, causing its rotational speed to decrease exponentially to a low speed (<500 rpm). The operator can directly observe the rotation direction of the visual indicator 12 with the naked eye and deduce the original rotation direction of the motor.

[0026] In some embodiments, a bearing 13 is provided between the rotating body 11 and the visual indicator 12. The inner ring of the bearing 13 is fixed to the rotating body 11, and the outer ring is connected to the visual indicator 12. In the initial stage of motor power-on, static friction coupling is formed by the pre-tight contact force between the balls and the inner and outer ring grooves, forcing the visual indicator 12 and the rotating body 11 to achieve zero-differential synchronous rotation, ensuring that the high-speed kinetic energy is completely transferred to the visual indicator 12. That is, when the motor starts to rotate, the friction between the balls in the bearing 13 and the inner and outer rings is sufficient to ensure that the visual indicator 12 rotates synchronously with the motor output shaft and the rotating body. When the motor is powered off and the rotating body 11 stops, the balls are removed from the static friction state and become free rolling, instantly releasing the mechanical linkage between the inner and outer rings, allowing the visual indicator 12 to rotate independently under the inertial torque. At the same time, the low friction characteristics of the bearing maximize the attenuation effect of air resistance on the rotation speed, achieving continuous direction display after power failure.

[0027] In some embodiments, the rotating body 11 is a tensioning bushing with a stepped structure, and a retaining ring 14 is provided on the axial side of the stepped structure to limit the bearing 13. Firstly, the retaining ring 14 is typically an open design, intended for flexible assembly and disassembly; for example... Figure 3 As shown, the tensioning bushing has a stepped structure with an annular groove (not marked in the figure) at the stepped section. The annular groove is located near the side of the bearing 13, and the shaft retaining ring is installed in the annular groove to limit the bearing and prevent axial movement. Furthermore, as a conventional mechanical component, the tensioning bushing can be quickly installed and removed from the motor output shaft using screw adjustment. During assembly, the locking screws of the tensioning bushing 11 are tightened to ensure that its inner walls on both sides approach and clamp the motor output shaft, forming a fit to capture full rotational kinetic energy.

[0028] In some embodiments, a counterweight pin 15 for dynamic balance adjustment is provided on the side of the visual indicator 12 away from the rotating body 11. When the rotating body 11 stops driving at the moment of power failure, the increased end mass of the counterweight pin 15 gives the visual indicator 12 an additional inertial torque, and its rotational speed decay time constant increases proportionally, extending the direction indication time from 3 seconds to 5 seconds; at the same time, the circumferential positioning of the counterweight pin 15 ensures that the resultant force of air resistance passes through the center of rotation, avoiding the generation of eccentric torque, ensuring that the visual indicator 12 returns to a stationary state in a pure rotational state without swaying, and ensuring that there is no misjudgment of direction by the naked eye.

[0029] In some embodiments, the visual indicator 12 is a sheet / strip structure that is wider at the bottom and narrower at the top, with its rotation plane perpendicular to the motor axis. When the visual indicator 12 is driven to rotate by the inertia of the rotating body 11, the sheet / strip plane perpendicular to the motor axis ensures that the air resistance vector always acts perpendicularly to the rotation tangent direction. The wide bottom section generates a high-intensity resistance torque due to its large frontal area, forcing a sharp drop in rotation speed, while the narrow top section reduces the tendency to swing due to its near-axial mass distribution. This allows the rotation trajectory to maintain a stable concentric circle motion without shaking at low speeds, ultimately outputting a reliable direction-finding signal through a clear and low-profile rotation direction for 3-5 seconds.

[0030] In some embodiments, a base 100 is also included, on which a horizontally fixed quick-change clamp 20 is provided. The horizontal clamping action of the clamping end presses against the tail section of the motor. The base 100 provides a basic support plane for the entire device. The horizontally fixed quick-change clamp 20 provided on it drives the clamping end to apply radial pressure to the tail section of the motor through horizontal linear motion. Under the premise of avoiding interference with the rotating probe module 10 at the motor output end, the clamping end of the horizontally fixed quick-change clamp 20 enables single-handle operation to complete the motor clamping.

[0031] In some embodiments, the clamping end of the horizontal fixed quick-change clamp 20 is detachably equipped with a pressure head 21. The pressure head 21 is connected by threads to allow for detachable installation on the clamping end of the horizontal fixed quick-change clamp 20, enabling modular switching of the clamping contact surface. For motors with different axial lengths, a pressure head 21 of the corresponding size can be quickly replaced to ensure that the clamping force always acts on the rigid housing part of the motor tail section, avoiding damage to the motor windings or shaft extension structure, while maintaining a constant clamping efficiency of 10 seconds.

[0032] In some embodiments, the base 100 is further provided with a support module 30 on the side away from the horizontally fixed quick-change fixture 20. The support module 30 is provided with a V-groove 31 for horizontally positioning the motor. The V-groove 31 forms an adaptive horizontal radial positioning with the motor housing through its inclined surfaces on both sides. Together with the clamping force of the quick-change fixture 20, it forms a stable torque constraint, so that the rotation center axis of motors with different diameters is aligned with the detection reference plane as much as possible, ensuring that the coaxiality error between the rotating probe module 10 and the motor output end is smaller.

[0033] In some embodiments, a side positioning plate 32 is detachably mounted on one side of the support base module 30. The top of the side positioning plate 32 has a U-shaped groove 33. The motor output side abuts against the side of the side positioning plate 32, and its output end passes through the U-shaped groove 33. The side positioning plate 32 is detachably mounted to one side of the support base module 30 by bolts. The U-shaped groove 33 on its top provides an axial positioning reference and shaft extension avoidance channel for the motor output end. When the motor housing abuts against the vertical end face of the side positioning plate 32, the axial position of the motor output side is forcibly fixed. At the same time, the open structure of the U-shaped groove 33 allows shaft extensions of different diameters to pass through without interference, ensuring the coaxial assembly accuracy of the rotating probe module 10 and the motor shaft extension end.

[0034] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A micro-high-speed motor rotation direction detection device, characterized in that, It includes a rotating probe module (10), which includes a rotating body (11) detachably connected to the motor output end and a visual indicator (12) connected to the rotating body (11). The visual indicator (12) is configured to drive the visual indicator (12) to rotate continuously at a low speed by the inertial torque of the rotating body (11) when the motor is powered off, and the rotation direction of the motor is indirectly determined by observing the rotation direction of the visual indicator (12).

2. The micro-high-speed motor rotation direction detection device as described in claim 1, characterized in that, A bearing (13) is provided between the rotating body (11) and the visual indicator (12). The inner ring of the bearing (13) is fixed to the rotating body (11), and the outer ring is connected to the visual indicator (12).

3. The micro-high-speed motor rotation direction detection device as described in claim 2, characterized in that, The rotating body (11) is a tensioning bushing with a stepped structure, and a retaining ring (14) for the shaft is provided on the axial side of the stepped structure to limit the bearing (13).

4. The micro-high-speed motor rotation direction detection device as described in claim 1, characterized in that, The visual indicator (12) has a counterweight pin (15) for dynamic balance adjustment on the side away from the rotating body (11).

5. The micro-high-speed motor rotation direction detection device as described in claim 1, characterized in that, The visual indicator (12) is a sheet / strip structure that is wider at the bottom and narrower at the top, and its rotation plane is perpendicular to the motor axis.

6. The micro-high-speed motor rotation direction detection device as described in claim 1, characterized in that: It also includes a base (100), on which a horizontal fixed quick-change clamp (20) is provided, the horizontal clamping action of which causes the clamping end to press against the tail section of the motor.

7. The micro-high-speed motor rotation direction detection device as described in claim 6, characterized in that, The clamping end of the horizontal fixed quick-change clamp (20) is detachably equipped with a pressure head (21).

8. The micro-high-speed motor rotation direction detection device as described in claim 6, characterized in that, The base (100) is also provided with a support module (30) on the side away from the horizontal fixed quick-change clamp (20), and the support module (30) is provided with a V-groove (31) for horizontally positioning the motor.

9. The micro-high-speed motor rotation direction detection device as described in claim 8, characterized in that, A side positioning plate (32) is detachably installed on one side of the support base module (30). The top of the side positioning plate (32) has a U-shaped groove (33). The motor output side abuts against the side of the side positioning plate (32) and its output end passes through the U-shaped groove (33).

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