Dynamic balance testing device for brushless motor production

Abstract

The utility model relates to a dynamic balance testing device for brushless motor production, which comprises a workbench and a testing assembly arranged on the workbench, two mounting tables are symmetrically arranged on the surface of the workbench, and the testing assembly comprises two supporting plates, two driven wheels and a driving wheel. The two supporting plates are fixedly installed on the table tops of the two installation tables correspondingly, V-shaped grooves are formed in the tops of the supporting plates, contact sensors are fixedly installed on the outer walls, located below the V-shaped grooves, of the supporting plates, a fixing plate is arranged between the two installation tables, and the fixing plate is fixedly installed on the table top of the workbench. The two driven wheels are installed at the two ends of the upper portion of the fixing plate through bearings, the motor is movably installed on the table top of the workbench, the driving wheel is installed at the output end of the motor, the pull rope drives the rotor to rotate, a fixed workpiece is replaced, the limitation of the weight of an external workpiece on an output shaft is reduced as much as possible, and the real rotor rotation condition is simulated.

Description

Technical Field

[0001] This utility model relates to the field of brushless motor technology, and in particular to a dynamic balancing test device for brushless motor production. Background Technology

[0002] A brushless DC motor consists of a motor body and a driver, and is a typical mechatronic product. Because brushless DC motors operate in a self-controlled manner, they do not have an additional starting winding on the rotor like synchronous motors that start under heavy loads with frequency conversion speed regulation. Therefore, the balance of the rotor during operation is required to a high degree. Generally, after the rotor is manufactured, a dynamic balancing test is required to observe the rotor's balance and smoothness of rotation.

[0003] When placing the rotor, the dynamic balancing test device requires a fixed workpiece to control the output end of the rotor so that it will not fall off during rotation. However, the fixed workpiece has a certain weight, and in order to control the rotor, a certain pressure is applied to the output shaft of the rotor, so that the rotation of the rotor is always restricted by external force, which cannot simulate the real situation when the rotor is working. Utility Model Content

[0004] The purpose of this application is to provide a dynamic balancing testing device for brushless motor production to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this application provides the following technical solution:

[0006] A dynamic balancing testing device for brushless motor production includes a workbench and a testing assembly mounted on the workbench. Two mounting platforms are symmetrically mounted on the workbench. The testing assembly includes two support plates, two driven wheels, and a driving wheel. The two support plates are respectively fixedly mounted on the two mounting platforms. A V-shaped groove is formed on the top of each support plate. A contact sensor is fixedly mounted on the outer wall of the support plate below the V-shaped groove. A fixing plate is provided between the two mounting platforms and is fixedly mounted on the workbench. The two driven wheels are mounted on the upper ends of the fixing plate via bearings. A motor is movably mounted on the workbench, and the driving wheel is mounted on the output end of the motor.

[0007] Preferably, a pull rope is sleeved around the outside of the two driven wheels and the driving wheel. Grooves are formed on the outer edges of the driving wheel and the two driven wheels, and the pull rope is embedded inside the grooves. The pull rope is made of elastic rope.

[0008] Preferably, a sensing end is fixedly installed above one of the mounting platforms, and the sensing end is installed on the side of the support plate away from the fixed plate. A cylinder is fixedly installed above the other mounting platform, and a movable plate is fixedly installed at the output end of the cylinder. A mating block is installed on the outer wall of the movable plate via a bearing. A slot is opened on one side of the outer wall of the mating block, and the movable plate is installed on the side of the support plate away from the fixed plate, with the slot of the mating block facing the support plate. A slot is opened through one side of the workbench, and a movable plate is movably installed in the slot. A cylinder is fixedly installed at the bottom of the workbench, and the output end of the cylinder is fixedly connected to the movable plate. A motor is fixedly installed above the movable plate.

[0009] The beneficial effects of this utility model are: by setting up a test component, the pull rope drives the rotor to rotate, replacing the fixed workpiece, minimizing the restriction of the external workpiece weight on the output shaft, and simulating the real rotor rotation situation. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0011] Figure 2 This is a schematic diagram of the overall (bottom view) structure of this utility model;

[0012] Figure 3 In this utility model Figure 1 A magnified schematic diagram of the structure of region A;

[0013] Figure 4 This is a schematic diagram of the working state of the rotor placed on the support plate in this utility model.

[0014] In the diagram: 1. Workbench; 2. Mounting platform; 3. Sensing end; 4. Support plate; 5. Fixed plate; 6. Driven wheel; 7. Pull rope; 8. Motor; 9. Movable plate; 10. Drive wheel; 11. Cylinder 1; 12. Moving plate; 13. Mating block; 14. Cylinder 2. Detailed Implementation

[0015] The preferred embodiments of this utility model will now be described in detail with reference to the accompanying drawings, so that the advantages and features of this utility model can be more easily understood by those skilled in the art, thereby providing a clearer and more definite definition of the scope of protection of this utility model. The directional terms mentioned in this utility model, such as "up," "down," "front," "back," "left," "right," "top," and "bottom," are only for reference to the accompanying drawings. Therefore, the directional terms used are for the purpose of explaining and understanding this utility model, and not for limiting this utility model.

[0016] like Figure 1-4The diagram illustrates a dynamic balancing testing device for brushless motor production, comprising a workbench 1 and a testing assembly mounted on the workbench 1. Two mounting platforms 2 are symmetrically mounted on the workbench 1. The testing assembly includes two support plates 4, two driven wheels 6, and a driving wheel 10. The two support plates 4 are fixedly mounted on the two mounting platforms 2, respectively. A V-shaped groove is formed on the top of each support plate 4. A contact sensor is fixedly mounted on the outer wall of the support plate 4 below the V-shaped groove. A fixing plate 5 is positioned between the two mounting platforms 2 and is fixedly mounted on the workbench 1. The two driven wheels 6 are mounted on the upper ends of the fixing plate 5 via bearings. A motor 8 is movably mounted on the workbench 1, and the driving wheel 10 is mounted on the output end of the motor 8. A pull rope 7 is sleeved around the two driven wheels 6 and the driving wheel 10. Grooves are formed on the outer edges of the driving wheel 10 and the two driven wheels 6, and the pull rope 7 is embedded within these grooves. The pull rope 7 is made of elastic rope.

[0017] A sensor 3 is fixedly installed above one of the mounting platforms 2. The sensor 3 is installed on the side of the support plate 4 away from the fixed plate 5. A cylinder 11 is fixedly installed above the other mounting platform 2. A movable plate 12 is fixedly installed at the output end of the cylinder 11. A mating block 13 is installed on the outer wall of the movable plate 12 via a bearing. A slot is opened on one side of the outer wall of the mating block 13. The movable plate 12 is installed on the side of the support plate 4 away from the fixed plate 5, and the slot of the mating block 13 faces the support plate 4. A slot is opened through one side of the workbench 1. A movable plate 9 is movably installed in the slot. A cylinder 2 14 is fixedly installed at the bottom of the workbench 1. The output end of the cylinder 2 14 is fixedly connected to the movable plate 9. A motor 8 is fixedly installed above the movable plate 9.

[0018] Example: The output shafts at both ends of the rotor are placed inside the V-shaped grooves at the top of the support plate 4. The rotor is positioned above the fixed plate 5. The rotor itself presses down on the pull rope 7 between the two driven wheels 6. One of the cylinders 11 above the mounting platform 2 is activated, driving the moving plate 12 to move closer to the output shaft on one side of the rotor, so that the groove of the mating block 13 abuts against the end of the output shaft. At the same time, the output shaft is pushed, causing the output shaft on one side to drive the rotor and the output shaft on the other side to move, so that the end of the output shaft on the other side abuts against the outer wall of the sensing end 3. The mating block 13 itself is not in a tight fit with the end of the output shaft. The groove in 3 provides a certain range of motion for the output shaft. The contact sensor on the outer wall of the support plate 4 is used to sense whether the output shaft is in place. If it is in place, both contact sensors will send an electrical signal to the control terminal of the test device. After receiving the two signals, the control terminal starts the motor 8. The motor 8 drives the drive wheel 10 to rotate. The drive wheel 10 drives the pull rope 7 to move. The pull rope 7 drives the two driven wheels 6 to move. One loop of the pull rope 7 is in a taut state. When the pull rope 7 moves, it will drive the rotor to rotate. The output shaft is driven to rotate. The sensing terminal 3 will record the rotational stability and oscillation amplitude of the rotor through the rotation of the output shaft.

[0019] The pull rope 7 is elastic. When no rotor is placed above the fixed plate 5, the pull rope 7 is in a loose state. The rotor presses down on the pull rope 7 by its own weight, making the pull rope 7 taut. However, during rotor production, it is impossible to achieve a completely uniform weight, and the elasticity of the pull rope 7 gradually decreases after long-term use. Therefore, sometimes when the rotor presses down on the pull rope 7, the pull rope 7 cannot achieve a perfect taut state. Before the pull rope 7 is scrapped and replaced, the operator can activate cylinder 2 14, which will cause cylinder 2 14 to drive the movable plate 9 to slide a certain distance in the slide groove of the worktable 1. This will increase the distance between the driving wheel 10 and the driven wheel 6 of the motor 8, allowing the pull rope 7 to be taut, thus not affecting the dynamic balance test results of the rotor.

[0020] It should be noted that the parts not covered in this utility model are the same as or can be implemented using existing technology; the various drives in this utility model can be implemented by corresponding power structures such as cylinders, oil cylinders, electric cylinders, and motors in conjunction with connecting rods, guide rods, etc., and are not limited to the structures described in the specification and the drawings.

[0021] The embodiments described above are merely examples of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.

Claims

1. A dynamic balancing testing device for brushless motor production, comprising a workbench (1) and testing components mounted on the workbench (1), characterized in that: Two mounting platforms (2) are symmetrically installed on the table surface of the workbench (1). The test assembly includes two support plates (4), two driven wheels (6) and a driving wheel (10). The two support plates (4) are respectively fixedly installed on the table surface of the two mounting platforms (2). A V-shaped groove is provided on the top of the support plate (4). A contact sensor is fixedly installed on the outer wall of the support plate (4) below the V-shaped groove. A fixing plate (5) is provided between the two mounting platforms (2). The fixing plate (5) is fixedly installed on the table surface of the workbench (1). The two driven wheels (6) are mounted on the upper ends of the fixing plate (5) through bearings. A motor (8) is movably installed on the table surface of the workbench (1). The driving wheel (10) is installed on the output end of the motor (8). A pull rope (7) is sleeved on the outside of the two driven wheels (6) and the driving wheel (10).

2. The dynamic balancing testing device for brushless motor production according to claim 1, characterized in that: A sensing end (3) is fixedly installed on the top of one of the mounting platforms (2). The sensing end (3) is installed on the side of the support plate (4) away from the fixed plate (5). A cylinder (11) is fixedly installed on the top of the other mounting platform (2). A moving plate (12) is fixedly installed on the output end of the cylinder (11). A mating block (13) is installed on the outer wall of the moving plate (12) through a bearing.

3. The dynamic balancing testing device for brushless motor production according to claim 2, characterized in that: The outer wall of the mating block (13) is provided with a slot, the movable plate (12) is installed on the side of the support plate (4) away from the fixed plate (5), and the slot of the mating block (13) faces the support plate (4).

4. The dynamic balancing testing device for brushless motor production according to claim 1, characterized in that: A slot is provided through one side of the workbench (1), and a movable plate (9) is movably installed in the slot. A cylinder (14) is fixedly installed at the bottom of the workbench (1). The output end of the cylinder (14) is fixedly connected to the movable plate (9). The motor (8) is fixedly installed above the movable plate (9).

5. The dynamic balancing testing device for brushless motor production according to claim 1, characterized in that: The outer edge of the driving wheel (10) and the two driven wheels (6) are provided with grooves, and the pull rope (7) is embedded in the groove. The pull rope (7) is made of elastic rope.

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