Device and method for detecting concentricity between motor internal spline and end cover stop

Abstract

The present invention discloses a device and method for detecting the concentricity of the internal spline and the end cover stopper of a motor, comprising a center disk, wherein the interior of the center disk is provided with a cylindrical cavity, a rectangular guide cavity and a detection mechanism, wherein the detection mechanism comprises a turntable rotatably connected to the interior of the cylindrical cavity, a plurality of symmetrically arranged guide grooves are provided on the top of the turntable, a first sliding block and a second sliding block are slidably connected to the inner wall of the rectangular guide cavity, a micro pressure sensor and a spring are provided between the first sliding block and the second sliding block, a guide block matching the guide groove is fixedly connected to the bottom of the first sliding block, and a pressure wheel is installed on the side of the second sliding block away from the spring. When the detection device of the present invention detects the concentricity of the internal spline and the end cover stopper, the operation is simple and quick, which not only improves the overall detection efficiency, but also makes the detection data accurate and the detection effect better; furthermore, the device can be applied to the concentricity detection of the internal spline and the end cover stopper of motors of different specifications, and has a wider applicability.

Description

Technical Field

[0001] The invention belongs to the technical field of motor detection, and in particular relates to a device and a method for detecting the concentricity of a motor internal spline and an end cover stop. Background Art

[0002] The motor end cover is one of the important parts inside the motor, usually located at both ends of the motor. Its main function is to seal and fix the inside of the motor. Due to the limitations of the actual production process, the motor end cover and the motor spindle are often processed separately and then assembled (such as Figure 1 During the assembly process, due to deviations in parts processing or accumulated deviations in assembly, there will be deviations in the concentricity between the end cover stop and the inner spline of the main shaft, which will cause damage to the motor bearings and motor vibration and noise defects, thereby affecting the performance of the motor after assembly.

[0003] To this end, it is necessary to test the concentricity of the assembled end cover stop and the internal spline; the existing testing method mostly uses standard inspection tools such as calipers, internal diameter gauges, and micrometers for manual inspection, and the efficiency and accuracy of the inspection are relatively low. Summary of the Invention

[0004] The present invention aims to solve the problems in the prior art and proposes the following technical solutions:

[0005] A device and method for detecting the concentricity of the internal spline and the end cover stopper of a motor comprises a center disk, wherein a cylindrical cavity, a rectangular guide cavity, and a detection mechanism are provided inside the center disk. The detection mechanism comprises a turntable rotatably connected to the inside of the cylindrical cavity, a plurality of symmetrically arranged guide grooves are provided on the top of the turntable, a first sliding block and a second sliding block are slidably connected to the inner wall of the rectangular guide cavity, a micro pressure sensor and a spring are provided between the first sliding block and the second sliding block, a guide block matching the guide groove is fixedly connected to the bottom of the first sliding block, a pressure wheel is installed on the side of the second sliding block away from the spring, and an internal spline plug column assembly and a rotation mechanism are respectively provided on both sides of the center disk;

[0006] The rotating mechanism is used to adjust the length of the pressure wheel to match the inner diameter of the end cover stop and rotate the detection device as a whole. During rotation, the pressure change values ​​of multiple micro pressure sensors are monitored to measure the concentricity detection data.

[0007] When conducting the test, align the inner spline plug-in column assembly of the detection device with the inner spline of the motor and insert it, insert it to the bottom and press against the rear pressure wheel and the end cover stopper on the same horizontal plane, and the turntable can be driven to rotate by the rotating mechanism. The rotation of the turntable drives the guide block, the first sliding block, the micro pressure sensor, the spring, the second sliding block, the pressure wheel and other components to slide outward along the rectangular guide cavity under the guidance of the movement of the guide groove until the pressure wheel presses against the inner side of the end cover stopper, and the spring is in a compressed state. At this time, the micro pressure sensor is in a compressed state, and the pressure data in this state is recorded on the micro pressure sensor. Then, the detection device is driven to rotate as a whole through the rotating mechanism, and multiple micro pressure sensors are monitored during rotation. The pressure change value data of the force sensor is collected and the data change is recorded. When the data change is small (within the set deviation) or does not change, it indicates that the concentricity of the inner spline and the end cover stopper meets the standard. On the contrary, when the data change is large, it indicates that it does not meet the standard. Moreover, the size of the data change of the micro pressure sensor can reflect the position and degree of eccentricity. The present invention is provided with multiple and symmetrically arranged guide grooves, pressure wheels and other components. Compared with a single number of detections, the multiple and symmetrical design can not only reduce the influence of the pressure wheel on the change in the position of the end cover stopper due to the squeezing of the inner side of the end cover stopper by the spring elastic potential energy, but also multiple numbers of detections can record multiple groups of data at the same time, avoiding data recording deviation. The detection device of the present invention is simple and quick to operate when detecting the concentricity of the inner spline and the end cover stopper, which not only improves the overall detection efficiency, but also makes the detection data accurate and the detection effect better.

[0008] As a preferred embodiment of the above technical solution, the rotating mechanism includes an outer rotating assembly and an inner rotating assembly, and the inner rotating assembly is arranged inside the outer rotating assembly.

[0009] In the present invention, the outer rotating assembly is used to rotate the entire detection device, and the inner rotating assembly is used to rotate the turntable.

[0010] As a preferred embodiment of the above technical solution, the outer rotating assembly includes an outer rotating column fixedly connected to one side of the central disk, and the periphery of the outer rotating column is fixedly connected to a symmetrically arranged shifting rod.

[0011] In the external rotating assembly, holding the external rotating column and turning the lever can drive the detection device to rotate as a whole.

[0012] As a preferred embodiment of the above technical solution, the internal rotating component includes an internal threaded hole opened inside the outer rotating column, and a circular through hole connected to the internal threaded hole is provided at the connection between the outer rotating column and the center disk. The internal thread of the internal threaded hole is connected to an externally threaded spline cylinder, and a spline rod is movably inserted inside the externally threaded spline cylinder. The end of the spline rod away from the externally threaded spline cylinder passes through the circular through hole and is fixed to the turntable.

[0013] In the internal rotating assembly, the spline rod and the turntable can be driven to rotate synchronously by rotating the externally threaded spline cylinder. Moreover, when the externally threaded spline cylinder is loosened, the externally threaded spline cylinder and the internally threaded hole are threadedly connected, which plays a limiting role on the externally threaded spline cylinder, spline rod, turntable and other components, ensuring their subsequent structural position stability.

[0014] As a preferred embodiment of the above technical solution, the guide groove is arc-shaped and the guide block is cylindrical.

[0015] The guide groove is processed into an arc shape and matched with a cylindrical guide block, so that when the turntable rotates, the first sliding block and other components can be driven to slide outward more smoothly.

[0016] As a preferred embodiment of the above technical solution, the internal spline plug assembly includes:

[0017] A fixed ring, which is fixedly connected to the center disk and located on the opposite side of the rotating mechanism, and the inner ring of the fixed ring is processed with an internal thread;

[0018] Insert the column, which matches the internal spline of the motor;

[0019] A threaded rod is fixedly connected to one end of the plug post and the external thread of the threaded rod matches the internal thread on the inner ring of the fixing ring.

[0020] In the present invention, the plug-in column and the threaded rod are an integrated structure. The threaded rod is provided to facilitate the replacement of the plug-in column on the fixed ring. By replacing plug-in columns of different specifications, the internal splines of motors of different specifications can be adapted. At the same time, the elongation of the pressure wheel and the adaptation to the inner diameter of the end cover stop can be adjusted by the rotating mechanism in the present invention, thereby making the present invention suitable for the concentricity detection of the internal splines of motors of different specifications and the end cover stop, and having a wider applicability.

[0021] A detection method is applied to the above-mentioned motor internal spline and end cover stop concentricity detection device, and the detection method includes:

[0022] S1. Installation: Align the internal spline plug assembly of the detection device with the internal spline of the motor and insert it until it is fully inserted and against the rear pressure wheel and the end cover stopper on the same horizontal plane. Adjust the extension of the pressure wheel by rotating the mechanism so that the pressure wheel is against the inner side of the end cover stopper and the spring is in a compressed state.

[0023] S2. Detection: The detection device is manually driven to rotate as a whole through the rotating mechanism. During the rotation, the pressure change values ​​of multiple micro pressure sensors are monitored to measure the detection data of concentricity.

[0024] The beneficial effects of the present invention are:

[0025] 1. The present invention provides a rotating mechanism for adjusting the length of the pressure wheel to match the inner diameter of the end cover stop and rotating the detection device as a whole. During rotation, the pressure change values ​​of multiple micro pressure sensors are monitored to measure the detection data of concentricity. The operation is simple and quick, which not only improves the overall detection efficiency, but also makes the detection data accurate and the detection effect better.

[0026] 2. In the present invention, the plug-in post and the threaded rod are an integrated structure. The threaded rod is provided to facilitate the replacement of the plug-in post on the fixed ring. By replacing plug-in posts of different specifications, the internal splines of motors of different specifications can be adapted. At the same time, the elongation of the pressure wheel and the adaptation to the inner diameter of the end cover stop can be adjusted by the rotating mechanism in the present invention, thereby making the present invention suitable for the concentricity detection of the internal splines of motors of different specifications and the end cover stop, and having a wider applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 Shown is a schematic diagram of the motor internal spline and end cover structure;

[0028] Figure 2 Shown is a schematic diagram of the three-dimensional structure of the present invention;

[0029] Figure 3 Shown is a partial cutaway view of the center disk of the present invention;

[0030] Figure 4 Shown is a side cross-sectional view of the present invention;

[0031] Figure 5 Shown is a schematic diagram of the structure of the detection mechanism in the present invention;

[0032] Figure 6 Shown is a schematic structural diagram of the internal spline plug-in column assembly in the present invention.

[0033] Reference numerals:

[0034] 10. Center disk; 20. Internal splined pin assembly; 21. Fixed ring; 22. Pin; 23. Threaded rod; 30. Rotating mechanism; 31. External rotating column; 32. Drive rod; 33. Splined rod; 34. Externally threaded splined cylinder; 35. Internally threaded hole; 40. Cylindrical cavity; 50. Rectangular guide cavity; 60. Detection mechanism; 61. Pressure wheel; 62. Turntable; 63. First sliding block; 64. Miniature pressure sensor; 65. Spring; 66. Second sliding block; 67. Guide block; 68. Guide groove. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments.

[0036] like Figure 2-Figure 5 As shown, Figure 2 Shown is a schematic diagram of the three-dimensional structure of the present invention, Figure 3 Shown is a partial cutaway view of the center disk 10 of the present invention. Figure 4 Shown is a side sectional view of the present invention, Figure 5 Shown is a schematic structural diagram of the detection mechanism 60 of the present invention.

[0037] The central disk 10 includes a cylindrical cavity 40, a rectangular guide cavity 50, and a detection mechanism 60. The detection mechanism 60 includes a turntable 62 rotatably connected to the cylindrical cavity 40. A plurality of symmetrically arranged guide grooves 68 are provided on the top of the turntable 62. A first sliding block 63 and a second sliding block 66 are slidably connected to the inner wall of the rectangular guide cavity 50. A micro pressure sensor 64 and a spring 65 are provided between the first sliding block 63 and the second sliding block 66. A guide block 67 matching the guide groove 68 is fixedly connected to the bottom of the first sliding block 63. A pressure wheel 61 is installed on the side of the second sliding block 66 away from the spring 65. An internal spline column assembly 20 and a rotation mechanism 30 are respectively provided on both sides of the central disk 10.

[0038] The rotating mechanism 30 is used to adjust the length of the pressure wheel 61 to match the inner diameter of the end cap stop and rotate the detection device as a whole. During rotation, the pressure change values ​​of multiple micro pressure sensors 64 are monitored to measure the detection data of concentricity.

[0039] During the inspection, the internal spline plug assembly 20 of the inspection device is aligned with the internal spline of the motor and inserted until it is inserted to the bottom and against the rear pressure wheel 61 and the end cover stopper on the same horizontal plane. The turntable 62 can be driven to rotate by the rotating mechanism 30. The rotation of the turntable 62 is guided by the movement of the guide groove 68, driving the guide block 67, the first sliding block 63, the micro pressure sensor 64, the spring 65, the second sliding block 66, the pressure wheel 61 and other components to slide outward along the rectangular guide cavity 50 as a whole until the pressure wheel 61 is against the inner side of the end cover stopper, and the spring 65 is in a compressed state. At this time, the micro pressure sensor 64 is in a pressurized state, and the pressure data in this state is recorded on the micro pressure sensor 64. Then, the inspection device is driven to rotate as a whole through the rotating mechanism 30. When the device is in motion, the pressure change value data of multiple micro pressure sensors 64 are monitored during rotation, and the data change is recorded. When the data change is small (within the set deviation) or does not change, it indicates that the concentricity of the inner spline and the end cover stop is up to standard. On the contrary, when the data change is large, it indicates that it does not meet the standard. Moreover, the size of the data change of the micro pressure sensor 64 can reflect the position and degree of eccentricity. In the present invention, multiple and symmetrically arranged guide grooves 68, pressure wheels 61 and other components are provided. Compared with a single number of detections, the multiple and symmetrical design can not only reduce the influence of the pressure wheel 61 on the change in the position of the end cover stop due to the elastic potential energy of the spring 65 squeezing the inner side of the end cover stop, but also multiple numbers of detections can record multiple groups of data at the same time, avoiding data recording deviation. The detection device of the present invention is simple and quick to operate when detecting the concentricity of the inner spline and the end cover stop, which not only improves the overall detection efficiency, but also makes the detection data accurate and the detection effect better.

[0040] It should be noted that the center disk 10 is a structure of two halves assembled together to facilitate the assembly of its internal components.

[0041] like Figure 4 As shown, Figure 4 Shown is a side cross-sectional view of the present invention.

[0042] The rotating mechanism 30 includes an outer rotating assembly and an inner rotating assembly, and the inner rotating assembly is arranged inside the outer rotating assembly; in the present invention, the outer rotating assembly is used to rotate the entire detection device, and the inner rotating assembly is used to rotate the turntable 62.

[0043] The outer rotating assembly includes an outer rotating column 31 fixedly connected to one side of the central disk 10, and the outer periphery of the outer rotating column 31 is fixedly connected to a symmetrically arranged shifting rod 32; in the outer rotating assembly, by holding the outer rotating column 31 and shifting the shifting rod 32, the detection device as a whole can be driven to rotate.

[0044] The inner rotating component includes an internal threaded hole 35 opened inside the outer rotating column 31, and a circular through hole connected to the internal threaded hole 35 is provided at the connection between the outer rotating column 31 and the center disk 10. The internal thread of the internal threaded hole 35 is connected to the external threaded spline cylinder 34, and the internal movably inserted into the external threaded spline cylinder 34 is a spline rod 33. The end of the spline rod 33 away from the external threaded spline cylinder 34 passes through the circular through hole and is fixed to the turntable 62; in the inner rotating component, the spline rod 33 and the turntable 62 can be driven to rotate synchronously by rotating the external threaded spline cylinder 34, and when the external threaded spline cylinder 34 is loosened, since the external threaded spline cylinder 34 and the internal threaded hole 35 are threadedly connected, it plays a limiting role on the external threaded spline cylinder 34, the spline rod 33, the turntable 62 and other components, thereby ensuring the subsequent structural position stability.

[0045] like Figure 5 As shown, Figure 5 Shown is a schematic structural diagram of the detection mechanism 60 of the present invention.

[0046] The guide groove 68 is arc-shaped, and the guide block 67 is cylindrical.

[0047] The guide groove 68 is processed into an arc shape and matched with the cylindrical guide block 67 so that when the turntable 62 rotates, the first sliding block 63 and other components can be driven to slide outward more smoothly.

[0048] like Figure 2 、 Figure 6 As shown, Figure 2 Shown is a schematic diagram of the three-dimensional structure of the present invention, Figure 6 Shown is a schematic structural diagram of the internal spline plug assembly 20 of the present invention.

[0049] The internal spline plug-in pin assembly 20 includes: a fixing ring 21, which is fixedly connected to the center disk 10 and is located on the opposite side of the rotating mechanism 30, and the inner ring of the fixing ring 21 is processed with an internal thread; a plug-in pin 22, which matches the internal spline of the motor; a threaded rod 23, which is fixedly connected to one end of the plug-in pin 22 and the external thread matches the internal thread on the inner ring of the fixing ring 21.

[0050] In the present invention, the plug post 22 and the threaded rod 23 are an integrated structure. The threaded rod 23 is provided to facilitate the replacement of the plug post 22 on the fixing ring 21. By replacing the plug posts 22 of different specifications, the internal splines of motors of different specifications can be adapted. At the same time, the elongation of the pressure wheel 61 and the adaptation to the inner diameter of the end cover stop can be adjusted by the rotating mechanism 30 in the present invention, thereby making the present invention suitable for the concentricity detection of the internal splines of motors of different specifications and the end cover stop, and having a wider applicability.

[0051] A detection method is applied to the above-mentioned motor internal spline and end cover stop concentricity detection device, and the detection method includes:

[0052] S1. Installation: Align the internal spline plug assembly 20 of the detection device with the internal spline of the motor and insert it until it is fully inserted and against the rear pressure wheel 61 and the end cover stopper are on the same horizontal plane. Use the rotating mechanism 30 to adjust the extension of the pressure wheel 61 so that the pressure wheel 61 is against the inner side of the end cover stopper and the spring 65 is in a compressed state.

[0053] S2. Detection: The detection device is manually driven to rotate as a whole by the rotating mechanism 30. During the rotation, the pressure change values ​​of the multiple micro pressure sensors 64 are monitored to measure the detection data of the concentricity.

[0054] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same.

Claims

1. The concentricity detection device of the motor internal spline and end cover stopper is characterized by: The invention comprises a central disk (10), wherein a cylindrical cavity (40), a rectangular guide cavity (50) and a detection mechanism (60) are provided inside the central disk (10), wherein the detection mechanism (60) comprises a turntable (62) rotatably connected inside the cylindrical cavity (40), wherein a plurality of symmetrically arranged guide grooves (68) are provided on the top of the turntable (62), wherein a first sliding block (63) and a second sliding block (66) are slidably connected to the inner wall of the rectangular guide cavity (50), wherein a micro pressure sensor (64) and a spring (65) are provided between the first sliding block (63) and the second sliding block (66), wherein a guide block (67) matching the guide groove (68) is fixedly connected to the bottom of the first sliding block (63), and a pressure wheel (61) is installed on the side of the second sliding block (66) away from the spring (65), and an inner spline column assembly (20) and a rotation mechanism (30) are provided on both sides of the central disk (10); The rotating mechanism (30) is used to adjust the extension length of the driving pressure wheel (61) so that it matches the inner diameter of the end cap stopper, and can drive the detection device to rotate as a whole. During the rotation, the pressure change values ​​of the plurality of micro pressure sensors (64) are monitored to measure the detection data of the concentricity; The rotating mechanism (30) comprises an outer rotating assembly and an inner rotating assembly, and the inner rotating assembly is arranged inside the outer rotating assembly; The outer rotating assembly comprises an outer rotating column (31) fixedly connected to one side of the central disk (10), and a symmetrically arranged shifting rod (32) is fixedly connected to the periphery of the outer rotating column (31); The inner rotating assembly includes an inner threaded hole (35) provided inside the outer rotating column (31), a circular through hole communicating with the inner threaded hole (35) is provided at the connection between the outer rotating column (31) and the center disk (10), the inner thread of the inner threaded hole (35) is connected to an outer threaded spline cylinder (34) through a thread, a spline rod (33) is movably inserted inside the outer threaded spline cylinder (34), and one end of the spline rod (33) away from the outer threaded spline cylinder (34) passes through the circular through hole and is fixed to the rotating disk (62); The internal spline plug assembly (20) comprises: A fixed ring (21), the fixed ring (21) is fixedly connected to the center disk (10) and is located on the opposite side of the rotating mechanism (30), and the inner ring of the fixed ring (21) is processed with an internal thread; A plug post (22) is matched with an inner spline of the motor; A threaded rod (23) is fixedly connected to one end of the plug post (22) and the external thread of the threaded rod (23) matches the internal thread on the inner ring of the fixing ring (21).

2. The device for detecting the concentricity of the motor internal spline and the end cover stopper according to claim 1, characterized in that: The guide groove (68) is arc-shaped, and the guide block (67) is cylindrical.

3. A detection method, characterized in that: The detection method is applied to the concentricity detection device for the motor internal spline and the end cover stop according to claim 1 or 2, and the detection method includes: S1. Installation: Align the inner spline plug assembly (20) of the detection device with the inner spline of the motor and insert it until it is fully inserted and against the rear pressure wheel (61) and the end cover stopper on the same horizontal plane. Adjust the extension of the pressure wheel (61) by rotating the mechanism (30) so that the pressure wheel (61) is against the inner side of the end cover stopper and the spring (65) is in a compressed state. S2. Detection: The detection device is manually driven to rotate as a whole by the rotating mechanism (30), and the pressure change values ​​of the plurality of micro pressure sensors (64) are monitored during the rotation to measure the detection data of the concentricity.

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