A device for testing the concentricity of motor shafts

Abstract

This invention discloses a device for detecting the concentricity of a motor shaft, belonging to the field of motor shaft detection. It includes a worktable, with a mounting plate installed on the top of the worktable. A rotating disk is rotatably connected inside the mounting plate. A clamping cavity is formed on one side of the rotating disk. A mounting seat is installed on the inner wall of the clamping cavity. A clamping rod is rotatably connected inside the mounting seat. A limiting plate is slidably connected to the top of the worktable. A first ball bearing is rotatably connected to one side of the limiting plate. The first ball bearing is at the same height as the center of gravity of the clamping cavity. A movable plate is fixed to the top of the mounting plate. This invention uses the movement of the limiting plate to place the motor shaft to be tested into the placement cavity. The movement of the limiting plate pushes the motor shaft, and one end of the motor shaft pushes one end of the clamping rod, causing the other end of the clamping rod to rotate. This avoids inaccurate detection due to poor clamping.

Description

Technical Field

[0001] This invention relates to the field of motor shaft inspection, specifically to a device for inspecting the concentricity of motor shafts. Background Technology

[0002] Electric motors are essential electrical components in various devices, providing power to these devices. Only when the motor is powered on can it rotate normally. Among the components of a motor, the motor shaft is an indispensable part. In order to improve the stability of motor operation, the motor shaft needs to maintain a high degree of concentricity.

[0003] In order to improve product quality during motor shaft processing, it is necessary to perform sampling inspection on the motor shaft. Therefore, it is necessary to use a motor shaft concentricity testing device. When using the motor shaft concentricity testing device, the motor shaft is placed in the clamping chamber and rotated. The stability of the motor shaft rotation is observed. When the concentricity is not within the specified range, the rotation of the motor shaft will cause shaking. This determines whether the concentricity of the motor shaft meets the quality requirements, and thus completes the inspection.

[0004] However, current equipment for testing the concentricity of motor shafts is inconvenient for installing and fixing the motor shaft, and the test results are prone to errors, leading to inaccurate results. Summary of the Invention

[0005] To solve the above-mentioned technical problems, a device for detecting the concentricity of motor shafts is provided. This technical solution solves the problems mentioned in the background art.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0007] A device for detecting the concentricity of a motor shaft includes a worktable, a mounting plate mounted on the top of the worktable, a rotating disk rotatably connected inside the mounting plate, a clamping cavity formed on one side of the rotating disk, a mounting seat mounted on the inner wall of the clamping cavity, a clamping rod rotatably connected inside the mounting seat, a limit plate slidably connected to the top of the worktable, a first ball bearing rotatably connected to one side of the limit plate, the first ball bearing being at the same height as the center of gravity of the clamping cavity, a movable plate fixed to the top of the mounting plate, a sliding groove formed inside the movable plate, a sliding block slidably connected inside the sliding groove, an infrared emitter that moves back and forth below the sliding block, and a mechanical detection module below the sliding block.

[0008] Preferably, the bottom of the sliding block is provided with a rotating cavity, a transmission wheel is rotatably connected inside the rotating cavity, and a rack plate is slidably connected inside the sliding block. There are two rack plates, and the two rack plates are symmetrical about the center of the transmission wheel. The infrared emitter is installed at the bottom of the rack plate.

[0009] Preferably, the two ends of the sliding groove are fixed with limiting grooves, the two ends of the sliding block are fixed with limiting sliders that cooperate with the limiting grooves, the front surface of the moving plate is provided with a moving groove that communicates with the limiting grooves, one side of the limiting slider is fixed with an installation rod that extends through to the outside of the moving groove, and the mechanical detection module is fixedly connected to the installation rod.

[0010] Preferably, the mechanical detection module includes a positioning block fixedly connected to the mounting rod. The positioning block has a sliding cavity inside, and a second return spring is installed inside the sliding cavity. The end of the second return spring is fixed with a sliding column that cooperates with the sliding cavity, and the end of the sliding column is rotatably connected to a second ball bearing.

[0011] Preferably, a drive source is installed on one side of the top of the workbench, the output end of the drive source is fixedly connected to the rotary disk, a gear is rotatably connected to the top of the inside of the mounting plate, and teeth that mesh with the gear are fixed to one end of the outer side of the rotary disk.

[0012] Preferably, a bidirectional screw is fixed to one side of the gear, extending into the sliding groove. The bidirectional screw passes through the sliding block, and the bidirectional screw and the sliding block are connected by a threaded rotation.

[0013] Preferably, a forward and reverse motor is installed at the top of the workbench, a limit groove is formed at the top of the workbench, the output end of the forward and reverse motor is connected to a lead screw that passes through the limit groove, a limit block is slidably connected inside the limit groove, the top of the limit block is connected to a limit plate, and the limit block and the lead screw are rotatably connected by a thread.

[0014] Preferably, the clamping rod is divided into two sections, which are perpendicular to each other. A first return spring is installed at the bottom of one section of the clamping rod, and the end of the first return spring is connected to the bottom of the clamping cavity.

[0015] Preferably, a pressure sensor is installed at one end of the second reset spring, and the second reset spring is connected to the sliding column through the pressure sensor.

[0016] Preferably, a host display is installed on one side of the top of the workbench, the pressure sensor is electrically connected to the host display, and a receiver board that cooperates with the infrared transmitter is installed on the top of the workbench, the receiver board being electrically connected to the host display.

[0017] Compared with the prior art, the present invention provides a device for detecting the concentricity of a motor shaft, which has the following advantages:

[0018] The motor shaft to be tested is placed into the placement cavity by moving the limit plate. The movement of the limit plate pushes the motor shaft, and one end of the motor shaft pushes one end of the clamping rod. At this time, the other end of the clamping rod rotates. This avoids inaccurate testing due to poor clamping effect.

[0019] The motor shaft rotates synchronously with the bidirectional screw, which works in conjunction with the sliding block to achieve screw movement. This causes the sliding block to move left and right, simultaneously pulling a set of rack plates. Under the action of the transmission wheel, the two rack plates move relative to each other, driving the infrared emitter to move relative to each other. This ensures that the light emitted by the infrared emitter is positioned on both sides of the motor shaft, illuminating the receiving plate. The sliding block moves left and right, and by observing the light emitted by the receiving plate, the overall flatness of the motor shaft is determined, completing the light detection. The result is displayed on the host monitor. Simultaneously, the positioning block moves synchronously with the sliding block. When the motor shaft is installed, the second return spring pushes the second ball to contact the outer side of the motor shaft. When the motor shaft rotates, the second ball moves left and right to contact the motor shaft. When the concentricity of the motor shaft is low, the outer side of the motor shaft is uneven, causing the sliding column to slide inside the sliding cavity, thus changing the pressure of the second return spring. The combination of these two methods improves the accuracy of the detection. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 This is a side view of the overall structure of the present invention;

[0022] Figure 3 This is an enlarged view of invention A;

[0023] Figure 4 This is an enlarged view of invention B;

[0024] Figure 5 This is a schematic diagram of the connection of the sliding block of the present invention;

[0025] Figure 6 This is an internal cross-sectional view of the sliding block of the present invention;

[0026] Figure 7 This is a schematic diagram of the positioning block connection of the present invention;

[0027] Figure 8 This is an internal cross-sectional view of the positioning block of the present invention;

[0028] Figure 9 This is a schematic diagram of the internal structure of the mounting plate of the present invention.

[0029] The numbers on the map are:

[0030] 1. Workbench; 2. Drive source; 3. Rotary disk; 4. Mounting plate; 5. Moving plate; 6. Sliding groove; 7. Moving groove; 8. Receiving plate; 9. Sliding block; 10. Forward and reverse motor; 11. Limiting groove; 12. Limiting block; 13. Main unit display; 14. Limiting plate; 15. First ball bearing; 16. Bidirectional screw; 17. Clamping cavity; 18. Mounting base; 19. Clamping rod; 20. First return spring; 21. Mounting rod; 22. Positioning block; 23. Rack plate; 24. Infrared transmitter; 25. Limiting slider; 26. Rotating cavity; 27. Transmission wheel; 28. Sliding column; 29. ​​Second ball bearing; 30. Sliding cavity; 31. Second return spring; 32. Gear; 33. Tooth. Detailed Implementation

[0031] The following description is intended to disclose the invention and enable those skilled in the art to implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art.

[0032] Example 1: Please refer to Figures 1-9 As shown, a device for detecting the concentricity of a motor shaft includes a worktable 1. A mounting plate 4 is mounted on the top of the worktable 1. A rotating disk 3 is rotatably connected inside the mounting plate 4. A clamping cavity 17 is formed on one side of the rotating disk 3 for clamping the motor shaft. A mounting seat 18 is mounted on the inner wall of the clamping cavity 17. A clamping rod 19 is rotatably connected inside the mounting seat 18. A limit plate 14 is slidably connected to the top of the worktable 1. A first ball bearing 15 is rotatably connected to one side of the limit plate 14. The first ball bearing 15 is at the same height as the center of gravity of the clamping cavity 17. The arrangement of the first ball bearing 15 facilitates the rotation of the motor shaft and reduces the friction between the motor shaft and the limit plate 14. The mounting plate 4... A movable plate 5 is fixed at the top, and a sliding groove 6 is opened inside the movable plate 5. A sliding block 9 is slidably connected inside the sliding groove 6. An infrared emitter 24 that moves back and forth is located below the sliding block 9. A mechanical detection module is located below the sliding block 9. The clamping rod 19 is divided into two sections, which are perpendicular to each other. The rotatable connection between the mounting base 18 and the clamping rod 19 is the position where the two sections of the clamping rod 19 are released. A first return spring 20 is installed at the bottom of one section of the clamping rod 19. The end of the first return spring 20 is connected to the bottom of the clamping cavity 17. The first return spring 20 facilitates the rapid rotation and reset of the clamping rod 19, thereby facilitating the next clamping of the motor shaft.

[0033] In this embodiment, the motor shaft is placed inside the clamping cavity 17, and then the limiting plate 14 moves to one side to push the motor shaft. At this time, one end of the motor shaft pushes a clamping rod 19 to rotate to one side, thereby driving another clamping rod 19 to rotate inward. The other clamping rod 19 clamps the motor shaft. The four sets of corresponding clamping rods 19 rotate inward to improve the clamping effect and improve the stability of rotation. The first return spring 20 facilitates the quick reset of the clamping rod 19 and synchronously adjusts the back and forth movement of the two infrared emitters 24. When the infrared emitter 24 emits rays, it fits the two ends of the motor shaft. When the drive source 2 starts, it drives the motor shaft to rotate through the rotating disk 3. When the motor shaft rotates, if the outer side is not flat, the rays will be blocked and the receiving plate 8 will not receive the rays. Then the signal is transmitted to the host display 13, which makes it convenient for the inspection personnel to check.

[0034] Example 2: Please refer to Figure 1 , Figure 5 and Figure 6 As shown, the bottom of the sliding block 9 is provided with a rotating cavity 26, and a transmission wheel 27 is rotatably connected inside the rotating cavity 26. A rack plate 23 is slidably connected inside the sliding block 9. There are two rack plates 23, and the two rack plates 23 are symmetrical about the dot of the transmission wheel 27. An infrared transmitter 24 is installed at the bottom of the rack plate 23. A receiving plate 8 that cooperates with the infrared transmitter 24 is installed on the top of the worktable 1. The receiving plate 8 is electrically connected to the host display 13.

[0035] In this embodiment, the transmission wheel 27 rotates inside the rotating cavity 26. At the same time, damping is provided at the rotation position of the transmission wheel 27 to increase the friction of the transmission wheel 27. When one rack plate 23 is pulled to move, the two rack plates 23 are moved relative to each other through the transmission wheel 27. The two rack plates 23 drive the infrared emitter 24 to move relative to each other. At the same time, the distance from the center position is the same, so that the light emitted by the infrared emitter 24 is adjusted to be closely attached to both sides of the motor shaft. The light emitted by the infrared emitter 24 shines on the receiving plate 8. When the receiving plate 8 does not receive the light, it is blocked by the motor shaft. At this time, the receiving plate 8 transmits the signal to the host display 13 through the infrared receiving module for recording, which is convenient for the inspection personnel to check. In addition, it can be checked whether there is eccentricity of the motor shaft.

[0036] Example 3: Please refer to Figure 1 , Figure 4 , Figure 7 , Figure 8 and Figure 9As shown, the sliding groove 6 has limit grooves fixed at both ends, and the sliding block 9 has limit sliders 25 fixed at both ends that cooperate with the limit grooves. The front surface of the moving plate 5 has a moving groove 7 that communicates with the limit grooves. One side of the limit slider 25 has a mounting rod 21 that extends through to the outside of the moving groove 7. The mechanical detection module is fixedly connected to the mounting rod 21. The mechanical detection module includes a positioning block 22 that is fixedly connected to the mounting rod 21. The positioning block 22 has a sliding cavity 30 inside, and a second return spring 31 is installed inside the sliding cavity 30. The end of the second return spring 31 is fixed with a sliding cavity 30. The sliding column 28 is mutually cooperating with the worktable 1. The end of the sliding column 28 is rotatably connected to the second ball bearing 29. The drive source 2 is installed on one side of the top of the worktable 1. The output end of the drive source 2 is fixedly connected to the rotating disk 3. The top of the mounting plate 4 is rotatably connected to the gear 32. One end of the rotating disk 3 is fixed with teeth 33 that mesh with the gear 32. One end of the second return spring 31 is equipped with a pressure sensor, and the second return spring 31 is connected to the sliding column 28 through the pressure sensor. The host display 13 is installed on one side of the top of the worktable 1. The pressure sensor is electrically connected to the host display 13.

[0037] In this embodiment, the limiting groove and the limiting slider 25 cooperate with each other to make the movement of the sliding block 9 more stable. The sliding block 9 drives the mechanical detection module to move synchronously with the infrared emitter 24 through the mounting rod 21. Under the action of the second return spring 31, the second return spring 31 pushes the sliding column 28 to one side, so that the second ball 29 is in contact with one side of the motor shaft. When the mechanical detection module moves horizontally, the second ball 29 moves and is in contact with the motor shaft at the same time. When the surface of the motor shaft is uneven or there is eccentricity, when the second ball 29 moves, in order to meet the contact with the motor shaft, it will squeeze the second return spring 31. Then the pressure sensor installed on the second return spring 31 will change, and the data will be transmitted to the host display 13 in time.

[0038] It is understandable that the drive source 2 drives the rotating disk 3 to rotate. Under the action of the teeth 33 and the gear 32 working together, the rotating disk 3 rotates and drives the gear 32 to rotate. The gear 32 drives the bidirectional screw 16 to rotate.

[0039] Example 4: Please refer to Figure 3 and Figure 4 As shown, a bidirectional screw 16 is fixed on one side of the gear 32, which penetrates into the sliding groove 6. The bidirectional screw 16 passes through the sliding block 9, and the bidirectional screw 16 and the sliding block 9 are connected by a threaded rotation.

[0040] In this embodiment, the gear 32 drives the bidirectional screw 16 to rotate. Since the bidirectional screw 16 is threadedly connected to the sliding block 9, when the bidirectional screw 16 rotates, it drives the sliding block 9 to move back and forth.

[0041] Example 5: Please refer to Figure 1 As shown, a forward and reverse motor 10 is installed at the top of the workbench 1. A limit groove 11 is opened at the top of the workbench 1. The output end of the forward and reverse motor 10 is connected to a lead screw that passes through the inside of the limit groove 11. A limit block 12 is slidably connected inside the limit groove 11. The top of the limit block 12 is connected to the limit plate 14. The limit block 12 and the lead screw are connected by a threaded rotation.

[0042] In this embodiment, the forward and reverse motor 10 drives the lead screw to rotate. At this time, the lead screw is threadedly connected to the limiting block 12. Simultaneously, under the mutual limiting action of the limiting block 12 and the limiting groove 11, the lead screw moves. When the lead screw rotates, the limiting block 12 moves in the limiting groove 11. The limiting block 12 drives the limiting plate 14 to move. The movement of the limiting plate 14 thereby clamps and fixes the motor shaft.

[0043] The working principle and usage procedure of this device are as follows: First, place the motor shaft inside the clamping cavity 17, and start the forward and reverse motor 10 to drive the lead screw to rotate. At this time, the lead screw is threadedly connected to the limiting block 12. Simultaneously, under the mutual limiting action of the limiting block 12 and the limiting groove 11, the lead screw moves. When the lead screw rotates, the limiting block 12 moves in the limiting groove 11, and the limiting block 12 drives the limiting plate 14 to move. The movement of the limiting plate 14 pushes the motor shaft to one side. At this time, one end of the motor shaft pushes a clamping rod 19 to rotate to one side. This causes another clamping rod 19 to rotate inward, clamping the motor shaft. The four corresponding clamping rods 19 rotate inward to improve the clamping effect and rotational stability. Then, when the rack plate 23 is pulled, the two rack plates 23 move relative to each other via the transmission wheel 27. The two rack plates 23 then drive the infrared emitter 24 to move relative to each other, maintaining the same distance from the center position. Afterward, the drive source 2 is activated, causing the motor shaft to rotate while the bidirectional screw 16 rotates, thereby driving the sliding block 9. During the movement, the sliding block 9 drives the mechanical detection module to move synchronously with the infrared emitter 24 via the mounting rod 21. Under the action of the second return spring 31, the second return spring 31 pushes the sliding column 28 to one side, so that the second ball 29 is in contact with one side of the motor shaft. When the mechanical detection module moves horizontally, the second ball 29 moves and simultaneously contacts the motor shaft. When the surface of the motor shaft is uneven or there is eccentricity, the second ball 29 will squeeze the second return spring 31 when it moves to meet the contact with the motor shaft. Then the pressure sensor installed on the second return spring 31 will change, and the data will be transmitted to the host display 13 in time. At the same time, the light emitted by the infrared emitter 24 is adjusted to be closely attached to both sides of the motor shaft. The rays emitted by the infrared emitter 24 irradiate the receiving plate 8. When the receiving plate 8 does not receive the rays, it is blocked by the motor shaft. At this time, the receiving plate 8 transmits the signal to the host display 13 through the infrared receiving module for recording, which is convenient for the inspection personnel to check, and thus can check whether there is eccentricity of the motor shaft.

[0044] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention. The scope of protection claimed by the appended claims and their equivalents is defined.

Claims

1. A device for detecting the concentricity of a motor shaft, comprising a worktable (1), characterized in that: A mounting plate (4) is installed on the top of the workbench (1). A rotating disk (3) is rotatably connected inside the mounting plate (4). A clamping cavity (17) is opened on one side of the rotating disk (3). A mounting seat (18) is installed on the inner wall of the clamping cavity (17). A clamping rod (19) is rotatably connected inside the mounting seat (18). A limit plate (14) is slidably connected to the top of the workbench (1). A first ball bearing (15) is rotatably connected to one side of the limit plate (14). The center of gravity of the first ball bearing (15) and the clamping cavity (17) are at the same height. A movable plate (5) is fixed to the top of the mounting plate (4). A sliding groove (6) is provided inside the movable plate (5). A sliding block (9) is slidably connected inside the sliding groove (6). An infrared emitter (24) that moves back and forth is located below the sliding block (9). A mechanical detection module is located below the sliding block (9). A rotating cavity (26) is provided at the bottom of the sliding block (9). A transmission wheel (27) is rotatably connected inside the rotating cavity (26). A rack plate (23) is slidably connected inside the sliding block (9). The number of rack plates (23) is... Two rack plates (23) are symmetrical about the dot of the transmission wheel (27). The infrared emitter (24) is installed at the bottom of the rack plate (23). The two ends of the sliding groove (6) are fixed with limit grooves. The two ends of the sliding block (9) are fixed with limit sliders (25) that cooperate with the limit grooves. The front surface of the moving plate (5) is provided with a moving groove (7) that communicates with the limit groove. One side of the limit slider (25) is fixed with a mounting rod (21) that extends through to the outside of the moving groove (7). The mechanical detection module is fixedly connected to the mounting rod (21). The mechanical detection module includes a positioning block (22) fixedly connected to the mounting rod (21). The positioning block (22) has a sliding cavity (30) inside. A second return spring (31) is installed inside the sliding cavity (30). A sliding column (28) that cooperates with the sliding cavity (30) is fixed at the end of the second return spring (31). A second ball bearing (29) is rotatably connected to the end of the sliding column (28). A pressure sensor is installed at one end of the second return spring (31), and the second return spring (31) is connected to the sliding column (28) through the pressure sensor.

2. The device for detecting the concentricity of a motor shaft according to claim 1, characterized in that: A drive source (2) is installed on one side of the top of the workbench (1). The output end of the drive source (2) is fixedly connected to the rotating disk (3). A gear (32) is rotatably connected to the top of the mounting plate (4). A tooth (33) that meshes with the gear (32) is fixed to one end of the outer side of the rotating disk (3).

3. The device for detecting the concentricity of a motor shaft according to claim 2, characterized in that: One side of the gear (32) is fixed with a bidirectional screw (16) that penetrates into the sliding groove (6). The bidirectional screw (16) penetrates the sliding block (9), and the bidirectional screw (16) and the sliding block (9) are connected by a threaded rotation.

4. The device for detecting the concentricity of a motor shaft according to claim 1, characterized in that: A forward and reverse motor (10) is installed at the top of the workbench (1). A limit groove (11) is opened at the top of the workbench (1). The output end of the forward and reverse motor (10) is connected to a lead screw that passes through the limit groove (11). A limit block (12) is slidably connected inside the limit groove (11). The top of the limit block (12) is connected to the limit plate (14). The limit block (12) and the lead screw are connected by a threaded rotation.

5. The device for detecting the concentricity of a motor shaft according to claim 1, characterized in that: The clamping rod (19) is divided into two sections, which are perpendicular to each other. A first return spring (20) is installed at the bottom of one section of the clamping rod (19), and the end of the first return spring (20) is connected to the bottom of the clamping cavity (17).

6. The device for detecting the concentricity of a motor shaft according to claim 1, characterized in that: A host display (13) is installed on one side of the top of the workbench (1). The pressure sensor is electrically connected to the host display (13). A receiver plate (8) that cooperates with the infrared transmitter (24) is installed on the top of the workbench (1). The receiver plate (8) is electrically connected to the host display (13).

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