Motor back electromotive force testing device

Abstract

The utility model relates to a motor counter electromotive force testing device which comprises a rack, a partition plate located above the rack is fixedly arranged on the rack, a partition plate through hole is formed in the partition plate, the bottom face of the partition plate is provided with an abutting piece which is of an annular structure, is coaxial with the partition plate through hole and can move up and down relative to the partition plate, and an elastic piece is arranged between the abutting piece and the partition plate. The rack is also provided with an oscilloscope and a Hall effect sensor which is movably arranged above the through hole of the partition plate and is electrically connected with the oscilloscope; the rack is further provided with a jacking mechanism which is located below the through hole of the partition plate, can ascend and descend relative to the partition plate and is used for conveying the to-be-tested motor. According to the utility model, the motor to be detected can be automatically assembled and positioned, the test is facilitated, and the test efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the field of motor testing, in particular to a motor back electromotive force testing device. Background Technique

[0002] A motor, commonly known as a motor; motor detection is one of the important links in the motor production process. During the production process of the motor, it is necessary to test the performance of the motor to determine whether it is qualified, and the test of the back electromotive force is one of the performance tests. By testing the back electromotive force of the motor, the performance of the motor under different working conditions can be understood. On the current motor production line, when testing the back electromotive force of the motor, the assembly process of the motor is cumbersome. It is necessary to manually pick up and place the motor to be detected at the test station and position it, and the degree of automation is low, which cannot meet the requirements of modern industrial production and test efficiency. Content of the Utility Model

[0003] In view of the existing deficiencies, the utility model provides a motor back electromotive force testing device.

[0004] The technical solution adopted by the utility model to solve its technical problems is: a motor back electromotive force testing device, including a frame, a partition fixed on the frame above the frame, a partition through hole provided on the partition, and a bottom surface of the partition is provided with an annular structure coaxially with the partition through hole and capable of moving up and down relative to the partition. A pressing member, and an elastic member is provided between the pressing member and the partition; an oscilloscope is also provided on the frame, and a Hall effect sensor electrically connected to the oscilloscope and movably arranged above the partition through hole; a lifting mechanism for conveying the motor to be tested is also provided on the frame below the partition through hole and capable of lifting relative to the partition.

[0005] Preferably, a plurality of connecting rods in a T-shaped structure are slidably arranged at equal intervals along the circumference of the partition through hole at the edge of the partition through hole; the bottom end of the connecting rod is fixedly connected to the top surface of the pressing member, and the elastic member is a telescopic spring sleeved on the connecting rod and between the top surface of the pressing member and the bottom surface of the partition.

[0006] Preferably, the Hall effect sensor is moved by an XY-axis moving platform provided on the frame.

[0007] Preferably, the XY-axis moving platform includes a horizontal guide rail provided on the frame and parallel to the partition, a base slidably arranged on the horizontal guide rail, a slider slidably arranged on the base, a first cylinder for driving the base to slide is also provided on the frame, the Hall effect sensor is arranged on the slider, and a second cylinder for driving the slider to slide up and down is also provided on the base.

[0008] Preferably, the diameter of the pressing member is not less than that of the partition through hole.

[0009] Preferably, the partition is fixedly installed on the frame by four support columns provided on the bottom surface of the partition, and the four support columns are fixedly connected to the frame in a manner located at the four vertices of a rectangle.

[0010] Preferably, the jacking mechanism includes a bottom plate fixedly connected to the frame, a movable plate movably arranged above the bottom plate, and a third air cylinder arranged on the bottom plate to drive the movable plate to move up and down; positioning columns for positioning are arranged on the top surface of the movable plate.

[0011] Preferably, a plurality of the positioning columns are provided, and the plurality of positioning columns enclose a placement space for fitting and placing the motor to be detected.

[0012] Preferably, the movable plate is provided with a through hole of the movable plate at a position corresponding to the placement space, and a pushing member located in the through hole of the movable plate is arranged on the bottom plate.

[0013] Preferably, the third air cylinder is arranged on the bottom surface of the bottom plate, the piston rod of the third air cylinder passes through the bottom plate and is connected to the bottom surface of the movable plate, and a plurality of guide columns passing through the bottom plate are arranged on the bottom surface of the movable plate.

[0014] The beneficial effects of the present utility model are as follows: The utility model assembles and positions the motor to be detected by the jacking mechanism rising and the pressing member, and then the Hall effect sensor moves downward to approach the motor to be detected that is positioned for detection. After the detection is completed, the Hall effect sensor moves upward, and the jacking mechanism descends to release the positioning of the motor to be detected, so that the motor to be detected can be conveniently transferred from the jacking mechanism to the next process, meeting the requirements of automated production and improving the testing efficiency. Description of the Drawings

[0015] Figure 1 is the front structural schematic diagram of the embodiment of the present utility model;

[0016] Figure 2 is the back structural schematic diagram of the embodiment of the present utility model;

[0017] Figure 3 is the structural schematic diagram between the pressing member and the jacking mechanism of the embodiment of the present utility model;

[0018] Figure 4 is the bottom surface structural schematic diagram between the pressing member and the jacking mechanism of the embodiment of the present utility model;

[0019] Names and serial numbers of components in the figure: 1 - frame; 10 - XY-axis moving platform; 100 - horizontal guide rail; 101 - base; 102 - slider; 103 - first cylinder; 104 - second cylinder; 2 - partition board; 20 - partition board through-hole; 21 - connecting rod; 22 - support column; 3 - pressing member; 4 - elastic member; 5 - oscilloscope; 6 - Hall effect sensor; 7 - jacking mechanism; 70 - bottom plate; 71 - movable plate; 72 - third cylinder; 73 - positioning column; 74 - movable plate through-hole; 75 - pushing member; 76 - guide post. Detailed implementation manners

[0020] In order to more clearly illustrate the purpose, technical solutions and advantages of the embodiments of the present invention, the present invention will be further described below in conjunction with the accompanying drawings and embodiments. The description is clear and complete. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of them. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the protection scope of the present invention. In addition, the directional terms mentioned in the present invention, such as "up", "down", "front", "back", "left", "right", "inside", "outside", etc., are only references to the directions in the attached drawings. The directional terms used are for better and clearer illustration and understanding of the present invention, rather than indicating or implying the directions that the present invention must have. Therefore, it cannot be understood as a limitation to the present invention.

[0021] The embodiments of the present invention are as follows Figures 1 to 4As shown in the figure, a back electromotive force test device for a motor includes a frame 1. A partition 2 is fixedly arranged above the frame 1. The partition 2 is a rectangular flat partition. Four support columns 22 are respectively connected to the four corners of its bottom surface by screws. The bottom ends of the support columns 22 are connected to the frame 1 by screws. That is, the partition 2 is fixedly installed on the frame 1 through the four support columns 22 arranged on the bottom surface of the partition 2. The four support columns 22 are fixedly connected to the frame 1 in a manner located at the four vertices of a rectangle. The partition 2 is arranged above the frame 1 in an overhead manner, and a receiving space is formed between the partition 2 and the frame 1. A partition through hole 20 is arranged on the partition 2. An abutting member 3 with an annular structure coaxial with the partition through hole 20 and capable of moving up and down relative to the partition 2 is arranged on the bottom surface of the partition 2. An elastic member 4 is arranged between the abutting member 3 and the partition 2. The abutting member 3 is circular. The partition through hole 20 is a circular through hole. The abutting member 3 and the partition through hole 20 are coaxial. The abutting member 3 is located below the partition 2 and can move up and down relative to the partition 2, and can move closer to or away from the partition 2. The elastic member 4 between the abutting member 3 and the partition 2 buffers the acting force on the abutting member 3 during the movement of the abutting member 3 under force to ensure the stability of the structure. At this time, a plurality of connecting rods 21 with a T-shaped structure are slidably arranged at equal intervals along the circumferential direction of the partition through hole 20 at the edge of the partition through hole 20 on the partition 2. For example, four sliding through holes for the connecting rods 21 to slide are arranged at equal intervals at the edge of the partition through hole 20 on the partition 2. The connecting rod 21 is composed of a vertical portion and a horizontal portion connected to the top end of the vertical portion to form a T-shaped structure. The vertical portion and the horizontal portion are integrally formed. The aperture of the sliding through hole is smaller than the width of the horizontal portion of the connecting rod. Then the four connecting rods 21 are respectively slidably arranged in the four sliding through holes. The T-shaped structure of the connecting rod 21 prevents it from falling out of the sliding through hole. The bottom end of the connecting rod 21 is fixedly connected to the top surface of the abutting member 3. The elastic member 4 is a telescopic spring sleeved on the connecting rod 21 and located between the top surface of the abutting member 3 and the bottom surface of the partition 2. The vertical portion of the connecting rod 21 passes through the sliding through hole and the bottom end of the vertical portion is connected to the top surface of the abutting member 3. In this way, the abutting member 3 is suspended on the partition 2. The two ends of the telescopic spring are respectively connected to the top surface of the abutting member 3 and the bottom surface of the partition 2. After an upward acting force is applied to the bottom surface of the abutting member 3, the abutting member 3 moves upward close to the partition 2. The telescopic spring is compressed under pressure and generates a downward reaction force on the abutting member 3. When the upward acting force on the abutting member 3 is equal to the downward reaction force, the abutting member 3 is in a static state and no longer moves.An oscilloscope 5 is also provided on the frame 1, and a Hall effect sensor 6 which is movably arranged above the through hole 20 of the partition plate and electrically connected to the oscilloscope 5. The Hall effect sensor 6 is connected to the oscilloscope 5 through a wire, and the length of the wire should be appropriate to meet the movement requirements of the Hall effect sensor 6. The back electromotive force of the motor is detected by the Hall signal detected by the Hall effect sensor 6. At the same time, the Hall effect sensor 6 can move up and down on the frame 1. When moving downward, it extends into the through hole 20 of the partition plate and the ring of the pressing member 3, and when moving upward, it can withdraw from the through hole 20 of the partition plate and the ring of the pressing member 3. A jacking mechanism 7 for conveying the motor to be tested is also provided on the frame 1 below the through hole 20 of the partition plate and can move up and down relative to the partition plate 2. During the test, the motor to be tested is placed on the jacking mechanism 7, and the jacking mechanism 7 moves upward so that the motor to be tested presses against the bottom surface of the pressing member 3. The pressing member 3 moves upward under the force until the force it receives reaches balance. Since an elastic member 4 is provided between the pressing member 3 and the partition plate 2, a buffering effect will be formed when the pressing member 3 contacts the motor to be tested, avoiding damage to the motor to be tested. At the same time, the Hall effect sensor 6 moves downward and extends into the ring of the pressing member 3 to approach the motor to be tested for testing. In such a structure, the motor to be detected realizes automatic assembly and positioning, meets the requirements of automatic production, and improves the test efficiency.

[0022] Further improvements, such as Figure 1 and Figure 2As shown in the figure, for the moving structure of the Hall effect sensor 6, in one case, the Hall effect sensor 6 is moved by the XY-axis moving platform 10 provided on the frame 1. The XY-axis moving platform 10 is provided at a position adjacent to the partition 2 on the frame 1, which facilitates the setting of the Hall effect sensor 6. At the same time, multiple placement stations for placing the motors to be tested can be arranged in parallel at intervals on the same horizontal line to perform batch detection. The XY-axis moving platform 10 includes a horizontal guide rail 100 provided on the frame 1 and parallel to the partition 2 in the horizontal direction, a base 101 slidably arranged on the horizontal guide rail 100, and a slider 102 slidably arranged on the base 101. A first cylinder 103 for driving the base 101 to slide is also provided on the frame 1. The Hall effect sensor 6 is arranged on the slider 102. A second cylinder 104 for driving the slider 102 to slide up and down is also provided on the base 101. The partition 2 is arranged in the front side of the top surface of the frame 1 in the left-right direction. The XY-axis moving platform 10 is arranged at the rear side of the top surface of the frame 1. The bottom surface of the base 101 is connected to the guide rail slider of the horizontal guide rail 100 itself. The base 101 slides on the horizontal guide rail 100 under the drive of the first cylinder 103. At the same time, a protrusion is provided on the front side surface of the base 101, and a chute matching and engaging with the protrusion is provided on the back surface of the slider 102. A support frame extending directly above the partition through hole 20 is provided on the front side surface of the slider 102, and the Hall effect sensor 6 is arranged on the support frame. In this way, under the drive of the first cylinder 103, the base 101 drives the Hall effect sensor 6 to move in the X-axis direction, and under the drive of the second cylinder 104, the slider 102 drives the Hall effect sensor 6 to move in the Y-axis direction. Another way is to replace the XY-axis moving platform with a three-axis moving platform so that the Hall effect sensor 6 can move in three-axis directions.

[0023] Further improvement, such as Figure 3 As shown in the figure, the diameter of the pressing member 3 is not less than the diameter of the partition through hole 20, that is, the diameter of the pressing member 3 is greater than or equal to the diameter of the partition through hole 20, which makes the pressing member 3 not protrude within the range covered by the partition through hole 20, facilitating the Hall effect sensor 6 to descend close to the motor to be detected.

[0024] Further improvement, such as Figure 1 、 Figure 3 and Figure 4As shown in the figure, the jacking mechanism 7 includes a bottom plate 70 fixedly connected to the frame 1, a movable plate 71 movably arranged above the bottom plate 70, and a third cylinder 72 arranged on the bottom plate 70 to drive the movable plate 71 to move up and down. The bottom plate 70 is fixed to the frame 1, and the third cylinder 72 is fixed to the bottom plate 70. The motor to be detected is placed on the movable plate 71. Then, the third cylinder 72 drives the movable plate 71 to move up and down above the bottom plate 70. When the movable plate 71 moves upward, it drives the motor to be detected to abut against the pressing member 3. When the movable plate 71 moves downward, it drives the motor to be detected to disengage from the pressing member 3. The third cylinder 72 is arranged on the bottom surface of the bottom plate 70, and the piston rod of the third cylinder 72 passes through the bottom plate 70 and is connected to the bottom surface of the movable plate 71. A plurality of guide columns 76 passing through the bottom plate 70 are arranged on the bottom surface of the movable plate 71. The arrangement of the third cylinder 72 on the bottom surface of the bottom plate 70 does not affect the up and down movement of the movable plate 71. At this time, a bottom plate through hole is arranged on the bottom plate 70 at a position corresponding to the center of the bottom surface of the movable plate 71. Then, the piston rod of the third cylinder 72 passes through the bottom plate through hole and is connected to the bottom surface of the movable plate 71 in a manner perpendicular to the bottom surface of the movable plate 71. In order to ensure the smooth up and down movement of the movable plate 71 and the stability of the movable plate 71 when carrying objects, the guide columns 76 are used for guiding and supporting. For example, four guide columns 76 are arranged at the four vertices of a rectangle formed on the bottom surface of the movable plate 71. The guide columns 76 are selected as telescopic rods that can be extended and retracted. The upper part is a movable part, and the lower part is a fixed part fixedly connected to the frame 1. The top end of the movable part is fixedly connected to the movable plate 71. Guide through holes for the movable part to pass through are arranged on the bottom plate 70. The lower end of the movable part passes through the guide through hole and is movably sleeved on the fixed part. Positioning columns 73 are arranged on the top surface of the movable plate 71. The positioning columns 73 are used to limit the motor to be detected placed on it to prevent it from moving. A plurality of positioning columns 73 are arranged, and the plurality of positioning columns 73 enclose a placement space that matches the placement of the motor to be detected. For example, if a motor carrier plate is placed on the movable plate 71 and the motor to be detected is placed on the motor carrier plate, four positioning columns 73 can be arranged at this time to limit the motor carrier plate in four directions. The movable plate 71 is provided with a movable plate through hole 74 at a position corresponding to the placement space, and a pushing member 75 located in the movable plate through hole 74 is arranged on the bottom plate 70. The pushing member 75 is arranged on the bottom plate 70. When the movable plate 71 moves downward, the pushing member 75 will protrude from the top surface of the movable plate 71, so that the motor to be detected placed on the movable plate 71 can be changed from a state where it is positioned and cannot move to a state where it can be moved, and it is very convenient to remove the motor to be detected from the movable plate 71 and move it to the next process.

[0025] Although the present utility model has been described in detail with general descriptions and specific embodiments above, based on the present utility model, some modifications or improvements can be made, which are obvious to those skilled in the art. Therefore, these modifications or improvements made without departing from the spirit of the present utility model all fall within the scope of protection required by the present utility model.

Claims

1. A motor back electromotive force test device, characterized in that: The invention comprises a frame, on which a partition plate located above the frame is fixedly arranged, on which a partition plate through hole is arranged, on which a ring-shaped pressing member coaxial with the partition plate through hole and capable of moving up and down relative to the partition plate is arranged on the bottom surface of the partition plate, and an elastic member is arranged between the pressing member and the partition plate; the frame is also provided with an oscilloscope and a Hall effect sensor movably arranged above the partition plate through hole and electrically connected to the oscilloscope; the frame is also provided with a lifting mechanism located below the partition plate through hole and capable of rising and falling relative to the partition plate for conveying a motor to be tested.

2. The motor back electromotive force testing device according to claim 1, characterized in that : The partition is provided with a plurality of connecting rods in a T-shaped structure at equal intervals and slidingly arranged along the circumference of the partition through hole at the edge of the partition through hole; the bottom end of the connecting rod is fixedly connected to the top surface of the pressure piece, and the elastic piece is a telescopic spring sleeved on the connecting rod and located between the top surface of the pressure piece and the bottom surface of the partition.

3. The motor back electromotive force testing device according to claim 1, characterized in that The Hall effect sensor is moved by an XY axis moving platform arranged on a frame.

4. The motor back electromotive force testing device according to claim 3, characterized in that The XY axis moving platform includes a horizontal guide rail arranged on a frame and parallel to the partition, a base slidably arranged on the horizontal guide rail, and a slider slidably arranged on the base. The frame is also provided with a first cylinder for driving the base to slide, the Hall effect sensor is arranged on the slider, and the base is also provided with a second cylinder for driving the slider to slide up and down.

5. The motor back electromotive force testing device according to claim 1, characterized in that : The diameter of the pressing member is not less than the diameter of the partition through hole.

6. The motor back electromotive force testing device according to claim 1, characterized in that The partition is fixedly mounted on the frame by four support columns arranged on the bottom surface of the partition, and the four support columns are fixedly connected to the frame in a manner of being located at the four vertices of a rectangle.

7. The motor back electromotive force testing device according to claim 1, characterized in that The lifting mechanism includes a base plate fixedly connected to the frame, a movable plate movably arranged above the base plate, and a third cylinder arranged on the base plate for driving the movable plate to move up and down; a positioning column for positioning is arranged on the top surface of the movable plate.

8. The motor back electromotive force testing device according to claim 7, characterized in that : There are multiple positioning columns, and the multiple positioning columns are enclosed to form a placement space that matches the motor to be tested.

9. The motor back electromotive force testing device according to claim 8, characterized in that The movable plate is provided with a movable plate through hole at a position corresponding to the placement space, and the bottom plate is provided with a pushing member located in the movable plate through hole.

10. The motor back electromotive force testing device according to claim 7, characterized in that The third cylinder is arranged on the bottom surface of the base plate, the piston rod of the third cylinder passes through the base plate and is connected to the bottom surface of the movable plate, and the bottom surface of the movable plate is provided with a plurality of guide columns passing through the base plate.

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