Frameless motor test tool

Abstract

The utility model discloses a frameless motor testing tool, and particularly relates to the technical field of motor testing, which comprises a base, the top end of the base is fixedly connected with a support frame, the front side of the support frame is provided with a motor stator, the inner side of the motor stator is provided with a motor rotor, the front side of the support frame is provided with a limiting assembly, and an auxiliary mechanism is arranged above the base; the limiting assembly comprises a fixed column, a plurality of first guide grooves are formed in the fixed column, guide columns are slidably connected into the first guide grooves, one ends of the guide columns are fixedly connected with movable columns, and threaded rods are in threaded connection with the interiors of the movable columns. According to the utility model, by arranging the limiting assembly and the auxiliary mechanism, a rigid supporting structure can be formed on the inner side of the motor rotor, displacement caused by centrifugal force or torque fluctuation in the testing process is reduced, and the motor rotor can be kept stable in the testing process; and meanwhile, centrifugal force or vibration generated by uneven mass distribution of the motor stator during high-speed rotation can be reduced, so that the test precision is improved.

Description

Technical Field

[0001] This utility model relates to the field of motor testing technology, and more specifically, to a frameless motor testing fixture. Background Technology

[0002] A frameless motor is a type of permanent magnet motor that consists of only two parts: a rotor and a stator. It lacks structures such as shafts, bearings, housings, or end covers. It features a compact structure, flexible configuration, and superior performance, and is widely used in fields such as robotics, medical, aerospace, and general automation. In current technology, performance testing of frameless motors before shipment usually requires the use of external testing fixtures.

[0003] In the prior art, when testing frameless motors before shipment, frameless motors are usually assembled with test fixtures by cold pressing or hot fitting through tight fit. After the frameless motor is assembled and tested, it is difficult to remove the frameless motor from the test fixture. If it is forcibly removed, it is easy to damage the frameless motor and make it impossible to ship. It may also damage the test fixture, making the test fixture unusable.

[0004] A search revealed that Chinese patent CN222365067U discloses a frameless motor testing fixture. During fixture testing, the rotor magnetic ring on the frameless motor is fixed at its front and rear ends by the cooperation of the flange and the limiting plate. After the fixture test is completed, the limiting plate is removed from the shaft. At this time, the rotor magnetic ring on the frameless motor can be removed from the testing fixture without damaging the frameless motor or the testing fixture, thus making the testing fixture reusable.

[0005] In actual use, the aforementioned frameless motor testing fixture only uses limiting plates for front and rear end fixation, lacking rigid support for the inside of the frameless motor. When the frameless motor rotates at high speed, it will undergo radial or axial deformation due to the lack of internal support, which will affect the test results. Utility Model Content

[0006] In order to overcome the above-mentioned defects of the prior art, the present invention provides a frameless motor testing fixture to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A frameless motor testing fixture includes a base, a support frame fixedly connected to the top of the base, a motor stator disposed on the front side of the support frame, a motor rotor mounted on the inner side of the motor stator, a limit assembly disposed on the front side of the support frame, and an auxiliary mechanism mounted above the base.

[0009] The limiting component includes a fixed column, with multiple first guide grooves inside the fixed column. A guide column is slidably connected inside the first guide groove. A movable column is fixedly connected to one end of the guide column. A threaded rod is threadedly connected inside the movable column. One end of the threaded rod is rotatably connected to the inside of the fixed column. A turntable is fixedly connected to the other end of the threaded rod. Multiple first hinge supports are fixedly connected to the outside of the movable column. A push rod is hinged inside the first hinge support. A second hinge support is hinged to one end of the push rod. A support plate is fixedly connected to one side of the second hinge support. Multiple second guide grooves are opened on the front side of the support frame. The support plate is slidably connected to the inner side of the second guide groove. Multiple first anti-slip strips are fixedly connected to the outside of the support plate. Multiple second anti-slip strips are fixedly connected to the outside of the first anti-slip strips.

[0010] By adopting the above technical solution, multiple support plates can be moved inside the motor rotor to support the inside of the motor rotor and form a rigid support structure, so that the motor rotor can remain stable during the test.

[0011] As a further description of the above technical solution: the auxiliary mechanism includes a stepper motor, which is fixedly connected to one side of the base. A bidirectional screw is fixedly connected to the output end of the stepper motor. The bidirectional screw is rotatably connected to the inside of the base. A threaded plate is threadedly connected to the outer side of the bidirectional screw. Multiple third guide grooves are opened inside the base. Sliders are fixedly connected to both sides of the threaded plate. The sliders are slidably connected to the inner side of the third guide groove. A support rod is fixedly connected to the top of the third guide groove. A fixed arc plate is fixedly connected to one side of the support rod. Multiple auxiliary rollers are rotatably connected inside the fixed arc plate. The multiple auxiliary rollers are arranged in a circular array inside the fixed arc plate.

[0012] By adopting the above technical solution, multiple auxiliary rollers can assist the motor stator in rotating, which can reduce the centrifugal force or vibration caused by uneven mass distribution when the motor stator rotates at high speed.

[0013] The technical effects and advantages of this utility model are as follows:

[0014] 1. By setting a limiting component, compared with the existing technology, the arc surface of multiple support plates can be used to adapt to motor rotors of different sizes. In conjunction with multiple first and second anti-slip strips, it can stably support and clamp the motor rotor inside, forming a rigid support structure inside the motor rotor. This reduces displacement caused by centrifugal force or torque fluctuations during the test, allowing the motor rotor to remain stable during the test.

[0015] 2. By setting up an auxiliary mechanism, compared with the existing technology, the two fixed arc plates can drive multiple auxiliary rollers to move relative to each other and contact the outside of the motor stator. This allows the multiple auxiliary rollers to rotate the motor stator in a ring outside the motor stator, which can reduce the centrifugal force or vibration caused by uneven mass distribution when the motor stator rotates at high speed, thereby improving the test accuracy and stability. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0017] Figure 2 This is a schematic diagram of the internal structure of the base of this utility model.

[0018] Figure 3 This is a cross-sectional view of the support frame of this utility model.

[0019] Figure 4 This is a cross-sectional view of the fixed column structure of this utility model.

[0020] Figure 5 This is a schematic diagram of the support plate structure of this utility model.

[0021] Figure 6 This is a partial structural diagram of the connection point of the fixed arc plate of this utility model.

[0022] The attached diagram is labeled as follows: 1. Base; 2. Support frame; 3. Fixed column; 4. First guide groove; 5. Guide column; 6. Movable column; 7. Threaded rod; 8. Turntable; 9. First hinge support; 10. Push rod; 11. Second hinge support; 12. Support plate; 13. First anti-slip strip; 14. Second anti-slip strip; 15. Second guide groove; 16. Motor stator; 17. Motor rotor; 18. Stepper motor; 19. Bidirectional screw; 20. Threaded plate; 21. Slider; 22. Third guide groove; 23. Support rod; 24. Fixed arc plate; 25. Auxiliary roller. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] The embodiments disclosed in this application are as follows: Figures 1-6The frameless motor testing fixture shown includes a base 1, a support frame 2 fixedly connected to the top of the base 1, a motor stator 16 arranged on the front side of the support frame 2, a motor rotor 17 installed inside the motor stator 16, a limit component arranged on the front side of the support frame 2, and an auxiliary mechanism installed above the base 1.

[0025] The limiting assembly includes a fixed post 3, with multiple first guide grooves 4 inside the fixed post 3. A guide post 5 is slidably connected inside each first guide groove 4. A movable post 6 is fixedly connected to one end of each guide post 5. A threaded rod 7 is threadedly connected inside the movable post 6. One end of the threaded rod 7 is rotatably connected to the inside of the fixed post 3, and a turntable 8 is fixedly connected to the other end of the threaded rod 7. Multiple first hinge supports 9 are fixedly connected to the outside of the movable post 6. A push rod 10 is hinged inside each first hinge support 9. A second hinge support 11 is hinged to one end of each push rod 10. A support plate 12 is fixedly connected to one side of the second hinge support 11. Multiple second guide grooves 15 are opened on the front side of the support frame 2. The support plate 12 is slidably connected to the inner side of the second guide grooves 15. Multiple first anti-slip strips 13 are fixedly connected to the outer side of the support plate 12, and multiple second anti-slip strips 14 are fixedly connected to the outer side of the first anti-slip strips 13. The threaded rod 7 can drive the movable column 6 to slide outside the fixed column 3 through the thread. Multiple guide columns 5 can provide guidance for the movement of the movable column 6. The movable column 6 can drive multiple first hinge supports 9 to move. The two ends of the push rod 10 are respectively hinged to the inner side of the first hinge support 9 and the second hinge support 11, so that when the movable column 6 moves, it can push the support plate 12 to extend outward through multiple push rods 10, so that multiple support plates 12 can be supported inside the motor rotor 17, which can reduce the displacement caused by centrifugal force or torque fluctuation during the test.

[0026] Reference Figure 2 and 6 As shown, the auxiliary mechanism includes a stepper motor 18, which is fixedly connected to one side of the base 1. A bidirectional screw 19 is fixedly connected to the output end of the stepper motor 18, and the bidirectional screw 19 is rotatably connected to the inside of the base 1. A threaded plate 20 is threadedly connected to the outer side of the bidirectional screw 19. Multiple third guide grooves 22 are provided inside the base 1. Slider 21 is fixedly connected to both sides of the threaded plate 20, and the slider 21 is slidably connected to the inner side of the third guide groove 22. A support rod 23 is fixedly connected to the top of the third guide groove 22, and a fixed arc is fixedly connected to one side of the support rod 23. The plate 24 has multiple auxiliary rollers 25 rotatably connected inside the fixed arc plate 24. The multiple auxiliary rollers 25 are arranged in a ring array inside the fixed arc plate 24. The two support rods 23 can be moved relative to each other by the bidirectional screw 19 through the third guide groove 22, so that the two fixed arc plates 24 can drive the multiple auxiliary rollers 25 to provide ring support on the outside of the motor stator 16. This can assist the motor stator 16 in rotating, reduce the centrifugal force or vibration caused by uneven mass distribution when the motor stator 16 rotates at high speed, and thus improve the test accuracy.

[0027] Working principle of this utility model: This utility model designs a frameless motor testing fixture, the specific structure of which is shown in the attached instruction manual. Figures 1-6 As shown, in this technical solution, through the cooperation between various structures, when it is necessary to test the motor stator 16 and the motor rotor 17, the motor rotor 17 is first placed outside multiple support plates 12. Then, the turntable 8 is manually rotated, and the turntable 8 drives the threaded rod 7 to rotate. The threaded rod 7 can drive the movable column 6 to slide outside the fixed column 3 through the thread. Multiple guide columns 5 can provide guidance and limiting functions, so that the movable column 6 can drive multiple first hinge supports 9 to move. The two ends of the push rod 10 are respectively hinged to the inner sides of the first hinge support 9 and the second hinge support 11, so that the movement of multiple first hinge supports 9 can be pushed by multiple push rods 10 to move the support plate 12 outward. The second guide groove 15 can provide guidance for the movement of the support plate 12, so that multiple support plates 12 can drive the support plate 12 to move outward. The first anti-slip strip 13 and the second anti-slip strip 14 support the inner side of the motor rotor 17, thereby supporting and fixing the inner side of the motor rotor 17. Then, the motor stator 16 is driven to rotate by an external device for testing. At the same time as the motor stator 16 rotates, the stepper motor 18 is started, and the stepper motor 18 drives the bidirectional screw 19 to rotate. The opposite thread direction on the outer side of the bidirectional screw 19 allows the bidirectional screw 19 to drive the threaded plate 20 to move through the thread, so that the two threaded plates 20 can drive the support rod 23 to move relative to each other. The two support rods 23 can drive multiple auxiliary rollers 25 to contact the surface of the motor stator 16 through the fixed arc plate 24. The multiple auxiliary rollers 25 can assist the motor stator 16 to rotate, so that the motor stator 16 can remain stable during rotation.

[0028] In the accompanying drawings of the embodiments disclosed in this utility model, only the structures involved in the embodiments of this utility model are shown. Other structures can be referred to with ordinary design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other.

[0029] All contents not described in detail in the specification are existing technologies known to those skilled in the art, and the model parameters of each electrical appliance are not specifically limited; conventional equipment can be used. Electrical control components not mentioned in this technical solution are existing technologies and are therefore not shown in the figures and will not be described here.

[0030] In conclusion, the above are merely preferred embodiments of this utility model and are not intended to limit this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A frameless motor testing fixture, comprising a base (1), characterized in that: The base (1) is fixedly connected to a support frame (2) at the top. A motor stator (16) is provided on the front side of the support frame (2). A motor rotor (17) is installed inside the motor stator (16). A limit component is provided on the front side of the support frame (2). An auxiliary mechanism is installed above the base (1). The limiting component includes a fixed post (3), which has multiple first guide grooves (4) inside. A guide post (5) is slidably connected inside the first guide groove (4). A movable post (6) is fixedly connected to one end of the guide post (5). A threaded rod (7) is threadedly connected inside the movable post (6). One end of the threaded rod (7) is rotatably connected to the inside of the fixed post (3), and a turntable (8) is fixedly connected to the other end of the threaded rod (7).

2. The frameless motor testing fixture according to claim 1, characterized in that: Multiple first hinge supports (9) are fixedly connected to the outside of the movable column (6). A push rod (10) is hinged inside the first hinge support (9). A second hinge support (11) is hinged to one end of the push rod (10). A support plate (12) is fixedly connected to one side of the second hinge support (11). Multiple second guide grooves (15) are opened on the front side of the support frame (2). The support plate (12) is slidably connected to the inner side of the second guide groove (15).

3. The frameless motor testing fixture according to claim 2, characterized in that: Multiple first anti-slip strips (13) are fixedly connected to the outside of the support plate (12), and multiple second anti-slip strips (14) are fixedly connected to the outside of the first anti-slip strips (13).

4. The frameless motor testing fixture according to claim 1, characterized in that: The auxiliary mechanism includes a stepper motor (18), which is fixedly connected to one side of the base (1). A bidirectional screw (19) is fixedly connected to the output end of the stepper motor (18), and the bidirectional screw (19) is rotatably connected to the inside of the base (1).

5. The frameless motor testing fixture according to claim 4, characterized in that: The bidirectional screw (19) is threaded to the outside of a threaded plate (20). The base (1) has multiple third guide grooves (22) inside. Sliders (21) are fixedly connected to both sides of the threaded plate (20). The sliders (21) are slidably connected to the inside of the third guide grooves (22).

6. The frameless motor testing fixture according to claim 5, characterized in that: The top of the third guide groove (22) is fixedly connected to a support rod (23), and a fixed arc plate (24) is fixedly connected to one side of the support rod (23).

7. The frameless motor testing fixture according to claim 6, characterized in that: The fixed arc plate (24) is rotatably connected to a plurality of auxiliary rollers (25), which are arranged in a ring array inside the fixed arc plate (24).

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