Motor end cover concentricity detection device and detection method

Abstract

This application belongs to the field of motor end cover testing technology, and discloses a device and method for testing the concentricity of motor end covers. The testing device includes a mounting base, a testing hole, a central column, a testing element, and a control mechanism. The mounting base is used to connect with the motor end cover to be tested. The testing hole penetrates the mounting base. During testing, the testing hole is coaxial with the testing hole of the motor end cover. The control mechanism is connected to the central column, which can move back and forth along the axial direction of the testing hole and rotate within the testing hole. The testing element is connected to one end of the central column and is used to connect with the testing hole. During testing, the control mechanism controls the central column to move towards the motor end cover to be tested, so that the testing element connects with the testing hole and rotates within the testing hole. The resistance encountered by the central column during rotation is monitored by a sensing component to determine the concentricity of the testing hole. In this application, the structure replaces manual labor with mechanical drive, standardizes the process, and improves testing efficiency and accuracy.

Description

Technical Field

[0001] This invention relates to the field of motor end cover testing technology, and in particular to a device and method for testing the concentricity of motor end covers. Background Technology

[0002] In the field of motor manufacturing, the motor end cover is a key component. The concentricity of the hole through which the motor output end passes and the bearing housing directly affects the assembly accuracy and operational stability of the motor. If the concentricity deviation is too large, it will lead to abnormal noise, increased vibration, increased energy consumption, and even shorten the service life of the motor. Therefore, the concentricity of the motor end cover must be strictly tested.

[0003] Currently, the concentricity inspection of motor end caps is mostly done by manually checking the machining dimensional tolerances. This method relies entirely on manual operation and subjective judgment, resulting in low inspection efficiency. Furthermore, due to individual differences in the inspection methods of different operators, it is difficult to unify the criteria for judging whether the concentricity is qualified, which can easily lead to certain deviations in the inspection results. Summary of the Invention

[0004] To address the aforementioned problems, this invention provides a device and method for detecting the concentricity of motor end caps, thereby improving detection efficiency and standardizing detection criteria.

[0005] The above-mentioned technical objective of the present invention is achieved through the following technical solution: a motor end cover concentricity detection device, comprising a mounting base, a detection hole, a central column, a detection element, and a control mechanism; the mounting base is used to connect with the end cover of the motor to be tested, the detection hole penetrates through the mounting base, and when the end cover of the motor to be tested is tested, the detection hole is coaxial with the test hole of the end cover of the motor to be tested, the control mechanism is connected to the central column, and the central column can move back and forth along the axial direction of the detection hole and rotate within the detection hole; the detection element is connected to one end of the central column and is used to connect with the test hole; during testing, the control mechanism controls the central column to move towards the end cover of the motor to be tested, so that the detection element connects with the test hole and rotates within the detection hole, and the resistance encountered by the central column during rotation is monitored by a sensing component to determine the concentricity of the test hole.

[0006] By setting up the above technical solution, when testing the concentricity of the end cover of the motor under test, the mounting base provides a stable connection foundation for the end cover of the motor under test, and the detection hole and the hole to be tested are coaxial to ensure that the detection benchmark is consistent; the control mechanism drives the central column to move and rotate along the axis of the detection hole, driving the detection component to connect with the hole to be tested and rotate synchronously, and the sensing component monitors the rotation resistance to determine the concentricity. This structure replaces manual operation with mechanical drive, reduces individual differences caused by human intervention, unifies the detection standard, and improves the objectivity, stability and accuracy of the detection. At the same time, the automated detection process also improves the detection efficiency.

[0007] Furthermore, it also includes a housing, the top of which is provided with mounting holes for mounting base installation. The sensing component is a pressure sensor. The control mechanism includes a lifting cylinder fixed to the inner bottom wall of the housing, a lifting frame connected to the piston rod of the lifting cylinder, a lower electric push rod fixed inside the lifting frame, and a U-shaped frame fixed to the top of the lifting frame. The lower end of the central column is rotatably connected to the U-shaped frame, and the bottom of the pressure sensor is fixed to the upper end of the lower electric push rod. The control mechanism also includes a drive shaft fixed to the top of the pressure sensor and coaxially arranged with the central column. The lower end of the central column is provided with a central hole, and a spiral protrusion is fixed to the inner wall of the central hole. The side wall of the drive shaft is provided with a spiral groove for sliding engagement with the spiral protrusion.

[0008] By setting up the above technical solution, when the control mechanism controls the lifting and continuous rotation of the central column, the operator only needs to control the lifting cylinder and the lower electric push rod through the control center to lift the lifting frame and the U-shaped frame. The pressure sensor and the drive shaft are also lifted with the movement of the lower electric push rod. Since the spiral groove on the drive shaft slides with the spiral protrusion in the central column, and the central column is rotatably installed on the top of the U-shaped frame, the central column continues to rotate during the lifting process (the lifting process of the central column is achieved by the drive of the lifting cylinder). During this process, the detection component rotates synchronously with the central column and performs rotation detection on the test hole of the motor end cover. The pressure sensor monitors the resistance encountered by the central column during the rotation and transmits it to the control center so that the control center can distinguish whether the concentricity of the motor end cover is qualified.

[0009] Furthermore, a mounting cavity is provided inside the central column, and a side opening communicating with the mounting cavity is provided on the side wall of the central column. The detection element includes a sliding block that slides with the side wall of the central column and a detection block connected to the top of the sliding block. An operating component for controlling the radial reciprocating motion of the detection block along the central column is provided inside the central column.

[0010] By setting up the above technical solution, when the central column enters the test hole of the motor end cover, the control center controls the detection block to move out of the side opening and reach the test hole through the operation component. At this time, the control center controls the central column of the control mechanism to rotate, thereby using the detection block to detect the concentricity of the test hole of the motor end cover.

[0011] Furthermore, the central column is provided with a placement cavity and a connecting groove connecting the placement cavity and the installation cavity. The operating components include an upper electric push rod fixed in the placement cavity, a lifting plate fixed to the upper end of the upper electric push rod, and a drive rod fixed to the top of the lifting plate. The lower section of the drive rod slides in the connecting groove, the upper section of the drive rod is inclined, and an oblique through hole is provided on the sliding block for the upper section of the drive rod to slide in.

[0012] By setting up the above technical solution, the control center controls the operation of the electric push rod, which can control the lifting plate to rise and fall along the inner wall of the placement cavity. The drive rod rises and falls synchronously with the lifting plate. Since the inclined section on the drive rod is engaged with the inclined through hole on the sliding block, and the sliding block is engaged with the side wall of the central column, the sliding block moves radially along the central column, which means that the detection block moves out of or into the installation cavity from the side opening.

[0013] Furthermore, it also includes a clamping mechanism, which includes a drive assembly. The drive assembly includes a clamping cylinder fixed to the housing and a drive plate connected to the piston rod of the clamping cylinder. Two symmetrically arranged through holes are provided through the drive plate. The clamping mechanism also includes clamping components, which are symmetrically arranged in two sets. The clamping components include swing arms rotatably mounted on the top of the housing. Each set of clamping components has two swing arms that are parallel to each other. The clamping components also include a connecting block fixed to the swing arm, a transmission shaft rotatably mounted on the top of the connecting block and slidingly engaged with the through holes, and clamping rods that are hinged to both swing arms. The line connecting the housing and the two swing arms is parallel to the line connecting the clamping rods and the two swing arms. A clamping arc surface is provided on the side of the two clamping rods that are close to each other.

[0014] By setting up the above technical solution, when the end cover of the motor under test is placed on the mounting base, the operator can control the movement of the clamping cylinder through the control center, so that the drive plate moves toward the side closer to or away from the mounting hole. Since the two through holes on the drive plate are slidably engaged with the two drive shafts respectively, the connecting block and the swing arm rotate around the rotation axis of the swing arm and the top of the housing. Since the two swing arms are parallel to each other, the line connecting the housing and the rotation axis between the two swing arms is parallel to the line connecting the clamping rod and the rotation axis between the two swing arms, which makes the two clamping rods move closer to each other until the two clamping arc surfaces engage and clamp the end cover of the motor under test, ensuring the stability of the test hole of the motor end cover during the concentricity test process.

[0015] Furthermore, it also includes a mounting ring and a stabilizing mechanism. The mounting base has an annular cross-section, and its longitudinal section is C-shaped, extending towards the side away from the axis of the mounting hole. The bottom edge of the motor end cover extends towards the side away from its axis, and multiple screw holes are provided on the bottom edge of the motor end cover. The mounting ring is located between the U-shaped frame and the mounting base. The stabilizing mechanism includes limiting components set on the mounting ring. The number of limiting components is equal to the number of screw holes, and their positions correspond one-to-one. The limiting components include limiting posts that pass through the screw holes. The limiting posts pass through the top and bottom of the mounting base and slide in fit. A connecting port is provided on the side wall of the limiting posts. The limiting components also include a buckle that slides through the connecting port and a spring that is fixed to the inner wall of the connecting port. The end of the spring away from the axis of the mounting hole is fixed to the side of the buckle that is close to the axis of the mounting hole.

[0016] By setting up the above technical solution, the limiting post passes through the screw holes of the mounting base and the motor end cover and slides in fit. The recessed reserved groove of the motor end cover cooperates with the limiting post to achieve circumferential positioning. After the buckle passes through the screw hole, it pops out and locks under the action of the spring. This can limit the radial offset and circumferential rotation of the motor end cover, enhance the fixing effect of the motor end cover, and ensure the stability and detection accuracy of the motor end cover during the concentricity detection process.

[0017] Furthermore, a telescopic sleeve is provided inside the connecting port, with both ends of the telescopic sleeve fixed to the buckle and the inner wall of the connecting port, respectively, and a spring sleeved on the outside of the telescopic sleeve.

[0018] By setting up the above technical solution, the telescopic sleeve plays a certain guiding role in the extension and retraction of the spring, reducing the probability of the buckle getting stuck in the communication port due to the spring bending arbitrarily.

[0019] Furthermore, the mounting base is provided with a retraction assembly for driving the buckle to retract into the communication port. The retraction assembly includes a connecting plate fixed to the outside of the mounting base, a retraction motor fixed to the connecting plate, a drive gear fixed to the output end of the retraction motor, a drive ring sleeved on the outside of the mounting base and rotatably connected thereto, a driven gear fixedly sleeved on the drive ring and meshing with the drive gear, and an abutment rod fixed to the side of the buckle away from the mounting hole. The end of the abutment rod away from the mounting hole is spherical. The drive ring is provided with multiple V-shaped parts extending toward the inside of the mounting base. The number of V-shaped parts is equal to the number of limiting posts and their positions correspond one-to-one.

[0020] By setting up the above technical solution, the retraction component on the mounting base drives the active gear through the retraction motor, which in turn drives the driven gear and the drive ring to rotate. The V-shaped part on the drive ring cooperates with the abutment rod on the buckle, which can drive the buckle to retract into the communication port, realizing the automatic release of the buckle's locked state. This not only improves the convenience and efficiency of releasing the limit, but also ensures the stability of the synchronous retraction of multiple buckles through the corresponding setting of the V-shaped part and the ball abutment rod.

[0021] Furthermore, a mounting bracket is fixed on the inner bottom wall of the housing. The stabilizing mechanism also includes a lifting assembly for controlling the lifting and lowering of the mounting ring. The lifting assembly includes two sets of lifting units symmetrically distributed on both sides of the U-shaped frame. Each lifting unit includes an upper horizontal plate fixed to the bottom of the mounting ring, a lower horizontal plate fixed to the mounting bracket and parallel to the upper horizontal plate, a sliding sleeve slidably mounted on the lower horizontal plate, a first diagonal rod hinged between the top of the sliding sleeve and the bottom of the upper horizontal plate, a sliding seat slidably mounted on the bottom of the upper horizontal plate, and a second diagonal rod hinged between the bottom of the sliding seat and the top of the lower horizontal plate and intersecting with the first diagonal rod. The lifting assembly also includes a power unit for controlling the synchronous movement of the sliding sleeves of the two sets of lifting units. The power unit includes a transverse cylinder fixed to the mounting bracket and a U-shaped plate connected to the piston rod of the transverse cylinder. The two ends of the U-shaped plate are respectively fixed to the sliding sleeves of the two sets of lifting units.

[0022] By setting up the above technical solution, the mounting frame inside the housing provides stable support for the lifting assembly. The lifting assembly drives the U-shaped plate through the transverse cylinder of the power unit, which drives the sliding sleeves of the two sets of lifting units to slide synchronously along the lower horizontal plate. This makes the first and second inclined rods, which are distributed in a cross pattern, linked together. Together with the sliding seat, the upper horizontal plate and the mounting ring are lifted and lowered smoothly, ensuring the synchronicity and stability of the lifting process of the mounting ring and improving the reliability of the device operation.

[0023] This application also discloses a method for detecting the concentricity of motor end covers using a motor end cover concentricity detection device, comprising the following steps:

[0024] S1. Place the end cover of the motor to be tested on the mounting base and connect and fix it;

[0025] S2. The control mechanism drives the central column to move towards the end cover of the motor to be tested, so that the detection piece is connected to the hole to be tested. The central column rotates during the movement, and the resistance encountered by the central column during rotation is monitored by the sensing component.

[0026] S3. Based on the comparison between the resistance data monitored by the sensing components and the preset threshold, determine whether the concentricity of the motor end cover is qualified.

[0027] S4. After the test is completed, the control mechanism drives the central column to reset and removes the motor end cover.

[0028] By setting up the above technical solution, this testing method operates in steps. First, the end cover of the motor to be tested is fixed on the mounting base to ensure stability during the testing process. Then, the control mechanism drives the central column to move and rotate, so that the test piece is connected to the test hole. Combined with the sensing component to monitor the resistance, the concentricity is judged by data comparison. Finally, the fixation is released and the end cover is removed. The whole process realizes the standardization and automation of the testing, reduces the error caused by human intervention, and improves the testing efficiency and the accuracy of the results.

[0029] In summary, the present invention has the following beneficial effects:

[0030] 1. In this application, the staff places the motor end cover on the mounting base, and after it is fixed by the clamping mechanism, the control mechanism causes the central column to rise and rotate, the test piece is detected synchronously, and the sensing component monitors the resistance and transmits it to the control center, which improves the efficiency and accuracy of the concentricity detection of the hole to be tested.

[0031] 2. In this application, the limiting post passes through the screw holes of the mounting base and the motor end cover and slides in fit. The recessed pre-reserved groove of the motor end cover cooperates with the limiting post to achieve circumferential positioning. After the buckle passes through the screw hole, it pops out and locks under the action of the spring, which can limit the radial offset and circumferential rotation of the motor end cover, enhance the fixing effect of the motor end cover, and ensure the stability and detection accuracy of the motor end cover during the concentricity detection process.

[0032] 3. This application reduces the risk of abnormal noise during motor operation and reduces energy consumption by detecting the concentricity of the hole to be tested. Furthermore, the overall testing process is standardized and automated, reducing errors caused by human intervention, improving testing efficiency and the accuracy of results, and achieving high efficiency and energy saving. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the structure for detecting the motor end cover according to an embodiment of the present invention;

[0034] Figure 2 This is a schematic diagram of the overall structure of an embodiment of the present invention;

[0035] Figure 3 This is a schematic diagram of the structure of the motor end cover in an embodiment of the present invention;

[0036] Figure 4 This is a schematic diagram illustrating the internal structure of the casing in an embodiment of the present invention;

[0037] Figure 5 This is a structural schematic diagram of an embodiment of the present invention used to highlight the stabilizing mechanism;

[0038] Figure 6 This is a schematic diagram of the structure used to highlight the central column in an embodiment of the present invention;

[0039] Figure 7 yes Figure 6 Enlarged view of point C in the middle;

[0040] Figure 8 This is a schematic diagram illustrating the structure of the clamping assembly in an embodiment of the present invention;

[0041] Figure 9 yes Figure 8 Enlarged view of point A in the middle;

[0042] Figure 10 yes Figure 5Enlarged view of point B in the middle;

[0043] Figure 11 This is a schematic diagram illustrating the structure of the shrinkage component in an embodiment of the present invention;

[0044] Figure 12 yes Figure 11 Enlarged diagram of point D in the middle.

[0045] In the diagram: 1. Housing; 11. Mounting hole; 12. Mounting bracket; 121. Rectangular through hole; 13. Mounting ring;

[0046] 2. Mounting base; 20. Detection hole; 21. Shrink assembly; 211. Connecting plate; 212. Shrink motor; 213. Drive gear; 214. Drive ring; 2141. V-shaped part; 215. Driven gear; 216. Abutment rod;

[0047] 3. Clamping mechanism; 31. Drive assembly; 311. Clamping cylinder; 312. Drive plate; 3121. Through hole;

[0048] 32. Clamping assembly; 321. Swing arm; 322. Connecting block; 323. Drive shaft; 324. Clamping rod; 3241. Clamping arc surface;

[0049] 4. Center post; 41. Center hole; 42. Spiral ridge; 43. Mounting cavity; 44. Side opening; 45. Placement cavity; 46. Connecting groove;

[0050] 5. Control mechanism; 51. Lifting cylinder; 52. Lifting frame; 53. Lower electric push rod; 54. U-shaped frame; 55. Drive shaft; 551. Spiral groove;

[0051] 6. Inspection component; 61. Sliding block; 611. Angled through hole; 62. Inspection block; 621. Arc surface;

[0052] 7. Sensing components; 8. Operating components; 81. Upper electric push rod; 82. Lifting plate; 83. Drive rod;

[0053] 9. Stabilizing mechanism; 91. Limiting component; 911. Limiting post; 9111. Connecting port; 9112. Telescopic sleeve; 912. Buckle; 913. Spring;

[0054] 92. Lifting assembly; 921. Lifting unit; 9211. Upper horizontal plate; 9212. Lower horizontal plate; 9213. Sliding sleeve; 9214. First diagonal bar; 9215. Sliding seat; 9216. Second diagonal bar; 922. Power unit; 9221. Transverse cylinder; 9222. U-shaped plate;

[0055] 10. Motor end cover; 101. Recessed pre-drilled groove; 102. Screw hole; 103. Test hole. Detailed Implementation

[0056] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0057] The motor end cover described in this application refers to the end cover of the energy-saving starter motor on a fully automatic or semi-automatic energy-saving washing machine, which is a component of an energy-saving household appliance.

[0058] like Figure 1 As shown in the figure, this application discloses a motor end cover concentricity detection device, including a housing 1. The top of the housing 1 is provided with a mounting hole 11 communicating with its interior. A mounting base 2 for placing a motor end cover 10 to be tested is coaxially fixed in the mounting hole 11. A detection hole 20 coaxially disposed at the center of the mounting base 2 is provided therewith. Figure 2 As shown, the housing 1 is provided with a clamping mechanism 3 for clamping the end cover 10 of the motor to be tested and keeping it coaxial with the mounting hole 11. The housing 1 is provided with a central column 4 coaxial with the mounting hole 11 and a control mechanism 5 for controlling the lifting and continuous rotation of the central column 4. The side wall of the central column 4 is provided with a detection element 6 for detecting the test hole 103 of the motor end cover 10. The housing 1 is also provided with a sensing element 7 for monitoring the resistance encountered by the central column 4 during rotation and electrically connected to the control center of the detection device.

[0059] Combined Figure 3 As shown, when testing the concentricity of the test hole 103 of the motor end cover 10, the operator only needs to place the motor end cover 10 on the mounting base 2 and use the clamping mechanism 3 to clamp and fix the motor end cover 10. The control mechanism 5 can control the central column 4 to rise and fall and rotate continuously. During this process, the detection component 6 rotates synchronously with the central column 4 and detects the test hole 103 of the motor end cover 10. The sensing component 7 monitors the resistance encountered by the central column 4 during rotation and transmits it to the control center to improve the efficiency and accuracy of the concentricity test of the test hole 103.

[0060] like Figure 4-6As shown, the sensing component 7 is a pressure sensor. A mounting bracket 12 is fixed on the inner bottom wall of the housing 1. A rectangular through hole 121 is provided on the top of the mounting bracket 12. The control mechanism 5 includes a lifting cylinder 51 fixed on the inner bottom wall of the housing 1 and located in the mounting bracket 12, a lifting frame 52 fixed to the piston rod end of the lifting cylinder 51, a lower electric push rod 53 fixed in the lifting frame 52, and a U-shaped frame 54 fixed to the top of the lifting frame 52. The lower end of the central column 4 passes through the top of the U-shaped frame 54 and is rotatably connected. The bottom of the pressure sensor is fixed to the upper end of the push rod of the lower electric push rod 53. The control mechanism 5 also includes a drive shaft 55 fixed to the top of the pressure sensor and coaxially arranged with the central column 4. A central hole 41 is provided at the lower end of the central column 4. A spiral protrusion 42 is fixed on the inner wall of the central hole 41. A spiral groove 551 for sliding cooperation of the spiral protrusion 42 is provided on the side wall of the drive shaft 55.

[0061] Combination Figure 2 and Figure 3 As shown, when the control mechanism 5 controls the lifting and continuous rotation of the central column 4, the operator only needs to control the lifting cylinder 51 and the lower electric push rod 53 to lift through the control center, thereby lifting the lifting frame 52 and the U-shaped frame 54. The pressure sensor and the drive shaft 55 are also lifted by the action of the lower electric push rod 53. Since the spiral groove 551 on the drive shaft 55 slides with the spiral protrusion 42 in the central column 4, and the central column 4 is rotatably mounted on the top of the U-shaped frame 54, the central column 4 continues to rotate during the lifting process (the lifting process of the central column 4 relies on the drive of the lifting cylinder 51). (Implementation) During this process, the detection component 6 rotates synchronously with the central column 4 and detects the test hole 103 of the motor end cover 10 (specific detection details are mentioned below). The pressure sensor monitors the resistance encountered by the central column 4 during rotation and transmits it to the control center. The control center will pre-set a standard resistance range based on the parameters of the qualified motor end cover 10. If the real-time resistance is always within this standard range, it indicates that the concentricity of the test hole 103 is qualified; if the real-time resistance exceeds the range (such as a sudden increase in resistance due to eccentricity, or a sudden decrease in resistance due to abnormal hole diameter), it is judged as unqualified. If the actual resistance value monitored by the pressure sensor on the central column 4 is less than the preset value, it indicates that the diameter of the test hole 103 of the motor end cover 10 is small, and the motor end cover 10 is also unqualified. This efficiently and accurately distinguishes whether the concentricity of the motor end cover 10 meets the standard.

[0062] like Figure 6 and Figure 7As shown, a mounting cavity 43 is provided inside the central column 4, and a side opening 44 communicating with the mounting cavity 43 is provided on the side wall of the central column 4 near its upper end. The detection element 6 includes a sliding block 61 that is slidably engaged with the side wall of the central column 4 and a detection block 62 integrally formed with the top of the sliding block 61. The side of the detection block 62 away from the axis of the central column 4 is an arc surface 621 coaxial with the central column 4. An operating component 8 is provided inside the central column 4 for controlling the detection block 62 to be retracted into the mounting cavity 43 or moved out of the side opening 44.

[0063] In other embodiments, the test element 6 may include a bearing adapted to the test hole 103 of the end cover 10 of the motor under test. The bearing may be coaxially connected to the central column 4, and the test is performed by placing the bearing into the test hole 103 and rotating it.

[0064] Combination Figure 2 and Figure 3 As shown, the diameter of the central column 4 is designed to be slightly smaller than the inner diameter of the test hole 103 of the motor end cover 10. Before the central column 4 passes through the test hole 103, the detection block 62 is located inside the side opening 44. After the central column 4 passes through the test hole 103, the control center control operation component 8 starts and controls the detection block 62 to move out of the side opening 44 until the arc surface 621 of the detection block 62 abuts against the inner wall of the test hole 103. As the central column 4 continues to rise and rotate (the rotation of the central column 4 is achieved by the drive shaft 55 rising under the control of the lower electric push rod 53, specifically because: the drive shaft 55 on The spiral groove 551 slides with the spiral protrusion 42 inside the central column 4. The detection block 62 rotates synchronously and completes the detection of the concentricity of the hole 103 to be tested through the arc surface 621 (the detection of the detection element 6 is only manifested as the sliding contact between the arc surface 621 of the detection element 6 and the inner wall of the hole 103 to be tested). If the hole 103 to be tested of the motor end cover 10 is eccentric (defective product), the detection block 62 of the detection element 6 will encounter greater resistance when rotating with the central column 4, the drive shaft 55 will have difficulty continuing to rise along the central hole 41, the central column 4 will have difficulty rotating, the sensing element 7 will detect greater resistance, and the control center will determine that the motor end cover 10 is a defective product. However, if the motor end cover 10 is a qualified product, the resistance encountered by the detection block 62 of the detection element 6 when rotating with the central column 4 is within the preset range, the rise and rotation of the drive shaft 55 are relatively smooth, the central column 4 can rotate smoothly, the resistance value monitored by the sensing element 7 is within a reasonable range, and the control center will determine that the motor end cover 10 is a qualified product.

[0065] like Figure 6 and Figure 7As shown, the central column 4 is provided with a placement cavity 45 and a connecting groove 46 for connecting the top wall of the placement cavity 45 with the bottom wall of the mounting cavity 43. The operating component 8 includes an upper electric push rod 81 fixed to the bottom wall of the placement cavity 45, a lifting plate 82 fixed to the upper end of the push rod of the upper electric push rod 81 and abutting against the inner wall of the placement cavity 45, and a drive rod 83 fixed to the top of the lifting plate 82. The vertical section of the drive rod 83 is slidably engaged with the connecting groove 46. The upper section of the drive rod 83 is an inclined section and bends toward the inside of the mounting cavity 43. The sliding block 61 is provided with an oblique through hole 611 for the inclined section of the drive rod 83 to slide.

[0066] The control center controls the operation of the electric push rod 81, which controls the lifting plate 82 to rise and fall along the inner wall of the placement cavity 45. The drive rod 83 rises and falls synchronously with the lifting plate 82. Since the inclined section on the drive rod 83 cooperates with the inclined through hole 611 on the sliding block 61, and the sliding block 61 slides with the side wall of the central column 4, the sliding block 61 moves radially along the central column 4, which means that the detection block 62 moves out of the side opening 44 or into the installation cavity 43.

[0067] like Figure 5 , Figure 8 and Figure 9 As shown, the clamping mechanism 3 includes a drive assembly 31, which includes a clamping cylinder 311 fixed to the housing 1 and a drive plate 312 fixed to the piston rod end of the clamping cylinder 311. Two symmetrically arranged through holes 3121 are provided through the drive plate 312. The clamping mechanism 3 also includes a clamping assembly 32, which has two sets corresponding to the two through holes 3121. The clamping assembly 32 includes a swing arm 321 rotatably mounted on the top of the housing 1. Each set of clamping assemblies 32 has two swing arms 321 that are parallel to each other. The component 32 also includes a connecting block 322 fixed on the swing arm 321 near the drive plate 312, a transmission shaft 323 rotatably mounted on the top of the connecting block 322 and slidingly engaged with the through hole 3121, and a clamping rod 324 hinged to the ends of the two swing arms 321 away from the drive plate 312. The line connecting the housing 1 and the rotation shaft between the two swing arms 321 is parallel to the line connecting the clamping rod 324 and the rotation shaft between the two swing arms 321. The clamping rod 324 is provided with a clamping arc surface 3241 coaxial with the mounting hole 11 on the side near the mounting hole 11.

[0068] Combination Figure 2As shown, when the end cover 10 of the motor under test is placed on the mounting base 2, the operator can control the movement of the clamping cylinder 311 through the control center, so that the drive plate 312 moves toward the side closer to or away from the mounting hole 11. Since the two through holes 3121 on the drive plate 312 are respectively slidably engaged with the two drive shafts 323, the connecting block 322 and the swing arm 321 rotate around the rotation axis of the swing arm 321 and the top of the housing 1. Since the two swing arms 321 are parallel to each other, the line connecting the housing 1 and the rotation axis between the two swing arms 321 is parallel to the line connecting the clamping rod 324 and the rotation axis between the two swing arms 321, so that the two clamping rods 324 move closer to each other until the two clamping arc surfaces 3241 engage and clamp the end cover 10 of the motor under test.

[0069] like Figure 4 , Figure 5 and Figure 10 As shown, the mounting base 2 has an annular cross-section, and its longitudinal section is C-shaped, extending towards the side away from the axis of the mounting hole 11. The bottom edge of the motor end cover 10 extends towards the side away from its axis. Figure 3 As shown, the motor end cover 10 has multiple evenly distributed recessed pre-reserved grooves 101 around its periphery. Screw holes 102 are provided through the bottom edge of the motor end cover 10 at positions corresponding to the recessed pre-reserved grooves 101. The housing 1 also includes a mounting ring 13 coaxial with the mounting hole 11 and located between the U-shaped frame 54 and the mounting base 2, as well as a stabilizing mechanism 9 for enhancing the stability of the concentricity detection process of the motor end cover 10. The stabilizing mechanism 9 includes limiting components 91 disposed on the mounting ring 13. The number of limiting components 91 is equal to the number of recessed pre-reserved grooves 101, and their positions correspond one-to-one. Each limiting component 91 includes a screw hole 102 penetrating through the groove. A limiting post 911 is provided inside the threaded hole 102 and cooperates with the recessed pre-reserved groove 101. The limiting post 911 passes through the top edge and bottom edge of the mounting base 2 and slides in cooperation with the mounting base 2. A communication port 9111 communicating with one side of the limiting post 911 is provided inside the limiting post 911. The limiting assembly 91 also includes a buckle 912 slidably installed between the inner top wall and the inner bottom wall of the communication port 9111 and a spring 913 fixed to the inner wall of the communication port 9111 near the axis of the mounting hole 11. The side of the spring 913 away from the axis of the mounting hole 11 is fixed to the side wall of the buckle 912 near the axis of the mounting hole 11.

[0070] like Figure 3 and Figure 10As shown, the limiting post 911 passes through the screw hole 102 of the mounting base 2 and the motor end cover 10 and slides in fit. The recessed pre-reserved groove 101 of the motor end cover 10 cooperates with the limiting post 911 to achieve circumferential positioning. After the buckle 912 passes through the screw hole 102, it pops out and locks under the action of the spring 913. This can limit the radial offset and circumferential rotation of the motor end cover 10, enhance the fixing effect of the motor end cover 10, and ensure the stability and detection accuracy of the motor end cover 10 during the concentricity detection process.

[0071] like Figure 10 As shown, a telescopic sleeve 9112 (a commonly used tubular telescopic structure consisting of a sleeve and an internal rod segment, with the ends of the sleeve and rod segment respectively connected to the two ends of the telescopic sleeve 9112) is provided inside the connecting port 9111. The two ends of the telescopic sleeve 9112 are fixed to the buckle 912 and the inner wall of the connecting port 9111, respectively, and a spring 913 is sleeved on the outside of the telescopic sleeve 9112. The telescopic sleeve 9112 provides a certain guiding effect on the extension and retraction of the spring 913, reducing the probability of the buckle 912 getting stuck in the connecting port 9111 due to the spring 913 bending arbitrarily.

[0072] like Figure 11 and Figure 12 As shown, the mounting base 2 is provided with a retraction assembly 21 for driving the buckle 912 to retract into the communication port 9111. The retraction assembly 21 includes a connecting plate 211 fixed to the bottom edge of the mounting base 2, a retraction motor 212 fixed to the connecting plate 211, a drive gear 213 fixed to the output end of the retraction motor 212, a drive ring 214 sleeved on the outside of the mounting base 2 and rotatably connected thereto, a driven gear 215 fixedly sleeved on the drive ring 214 and meshing with the drive gear 213, and an abutment rod 216 fixed to the side of the buckle 912 away from the mounting hole 11. The end of the abutment rod 216 away from the mounting hole 11 is spherical. The drive ring 214 is provided with a plurality of V-shaped portions 2141 extending toward the inside of the mounting base 2. The number of V-shaped portions 2141 is equal to the number of limiting posts 911 and their positions correspond one-to-one.

[0073] The retraction assembly 21 on the mounting base 2 drives the drive gear 213 through the retraction motor 212, which in turn drives the driven gear 215 and the drive ring 214 to rotate. The V-shaped part 2141 on the drive ring 214 cooperates with the abutment rod 216 on the buckle 912, which can drive the buckle 912 to retract into the communication port 9111, realizing the automatic release of the locking state of the buckle 912. This not only improves the convenience and efficiency of releasing the limit, but also ensures the stability of the synchronous retraction of multiple buckles 912 through the corresponding setting of the V-shaped part 2141 and the ball abutment rod 216.

[0074] Such as 4 and Figure 5As shown, the stabilizing mechanism 9 also includes a lifting assembly 92 for controlling the lifting of the mounting ring 13. The lifting assembly 92 includes two sets of lifting units 921 symmetrically distributed on both sides of the U-shaped frame 54. The lifting unit 921 includes an upper horizontal plate 9211 fixed to the bottom of the mounting ring 13, a lower horizontal plate 9212 fixed to the inner wall of the rectangular through hole 121 and parallel to the upper horizontal plate 9211, a sliding sleeve 9213 slidably sleeved on the lower horizontal plate 9212, a first inclined rod 9214 hinged between the top of the sliding sleeve 9213 and the bottom of the upper horizontal plate 9211, a sliding seat 9215 slidably installed on the bottom of the upper horizontal plate 9211, and a first inclined rod 9214 hinged to the top of the sliding sleeve 9213 and the bottom of the upper horizontal plate 9211. The sliding seat 9215 is located between the bottom and the top of the lower horizontal plate 9212, and the second inclined rod 9216 is distributed intersecting the first inclined rod 9214. The position of the sliding seat 9215 is symmetrical to the position of the sliding sleeve 9213. The lifting assembly 92 also includes a power unit 922 for controlling the synchronous movement of the sliding sleeves 9213 of the two lifting units 921. The power unit 922 includes a transverse cylinder 9221 fixed on the mounting bracket 12 and a U-shaped plate 9222 fixed to the piston rod end of the transverse cylinder 9221. The two ends of the U-shaped plate 9222 are respectively fixed to the sliding sleeves 9213 of the two lifting units 921.

[0075] Combination Figure 2 and Figure 12 As shown, after the concentricity test of the motor end cover 10 is completed, the staff only needs to control the retraction motor 212 through the control center to make the drive gear 213 drive the driven gear 215 meshing with it and the drive ring 214 fixed with the driven gear 215 to rotate. When the V-shaped part 2141 on the drive ring 214 rotates with it, it will contact and squeeze the ball end of the abutment rod 216, so that the buckle 912 overcomes the elastic force of the spring 913 and retracts into the communication port 9111, thereby releasing the limit on the motor end cover 10. Subsequently, the operator controls the transverse cylinder 9221 via the control center, causing the U-shaped plate 9222 to move away from the axis of the mounting hole 11. This pulls the two sliding sleeves 9213 to move synchronously, causing the "X"-shaped support structure formed by the first diagonal rod 9214 and the second diagonal rod 9216 to deform. This causes the upper transverse plate 9211, the mounting ring 13, and the limiting component 91 set on the mounting ring 13 to all descend until the limiting post 911 retracts into the housing 1. Finally, the operator controls the clamping cylinder 311 via the control center, which causes the two clamping rods 324 to release the motor end cover 10, allowing the operator to remove the inspected motor end cover 10.

[0076] like Figure 2 , Figure 3 , Figure 5 and Figure 6 As shown in the embodiments of this application, a method for detecting the concentricity of a motor end cover using a motor end cover concentricity detection device is also disclosed, comprising the following steps:

[0077] S1. Place the end cover 10 of the motor to be tested on the mounting base 2 and connect and fix it;

[0078] S2. The control mechanism 5 drives the central column 4 to move towards the end cover 10 of the motor to be tested, so that the detection element 6 is connected to the hole to be tested 103. The central column 4 rotates during the movement, and the resistance encountered by the central column 4 during rotation is monitored by the sensing element 7.

[0079] S3. Based on the comparison between the resistance data monitored by the sensing component 7 and the preset threshold, determine whether the concentricity of the motor end cover 10 is qualified.

[0080] S4. After the test is completed, the control mechanism 5 drives the central column 4 to reset and removes the motor end cover 10.

[0081] In other embodiments, to enhance the stability of step S1 during the testing of the motor end cover 10, the motor end cover 10 can be clamped and fixed by the clamping mechanism 3, while the limiting component 91 of the stabilizing mechanism 9 limits and fixes the motor end cover 10. The specific process has been described above. After the motor end cover 10 completes the corresponding concentricity test, the clamping mechanism 3 and the stabilizing mechanism 9 need to be controlled to release the fixation of the motor end cover 10 in order to proceed with the next testing of the motor end cover 10. This includes the following steps:

[0082] Place the motor end cover to be tested on the mounting base, clamp and fix the motor end cover by the clamping mechanism, and at the same time use the limiting component of the stabilizing mechanism to limit and fix the motor end cover.

[0083] The control mechanism drives the central column to move towards the end cover of the motor under test, so that the detection piece is connected to the hole under test. The central column rotates during the movement, and the resistance encountered by the central column during rotation is monitored by the sensing component.

[0084] Based on the comparison between the resistance data monitored by the sensing components and the preset threshold, it is determined whether the concentricity of the motor end cover is qualified.

[0085] After the test is completed, the control mechanism drives the central column to reset, and the clamping mechanism and stabilizing mechanism release the fixation of the motor end cover, and the motor end cover is removed.

[0086] The detection method of this scheme adopts a step-by-step operation. First, the end cover 10 of the motor under test is double-fixed by the clamping mechanism 3 and the limiting component 91 of the stabilizing mechanism 9 to ensure stability during the detection process. Then, the control mechanism 5 drives the central column 4 to move and rotate, so that the detection component 6 is connected to the hole under test 103. Combined with the sensing component 7 to monitor the resistance, the concentricity is judged by data comparison. Finally, the fixation is released and the end cover is removed. The overall process realizes the standardization and automation of the detection, reduces the error caused by human intervention, and improves the detection efficiency and the accuracy of the results.

[0087] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A device for detecting the concentricity of an electric motor end cover, characterized in that: It includes a mounting base (2), a detection hole (20), a central column (4), a detection component (6), and a control mechanism (5); The mounting base (2) is used to connect with the end cover (10) of the motor under test. The detection hole (20) passes through the mounting base (2). When the end cover (10) of the motor under test is tested, the detection hole (20) is coaxial with the test hole (103) of the end cover (10) of the motor under test. The control mechanism (5) is connected to the central column (4). The central column (4) can move back and forth along the axial direction of the detection hole and rotate within the detection hole (20). The detection piece (6) is connected to one end of the central column (4) and is used to abut against the inner wall of the test hole (103). During the test, the control mechanism (5) controls the central column (4) to move towards the end cover (10) of the motor to be tested, so that the test piece (6) abuts against the inner wall of the test hole (103) and rotates in the test hole (20). The resistance experienced by the central column (4) during the rotation is monitored by the sensing component (7) to determine the concentricity of the test hole (103). The detection device also includes a housing (1), the top of which is provided with a mounting hole (11) for mounting the mounting base (2). The sensing component (7) is a pressure sensor. The control mechanism (5) includes a lifting cylinder (51) fixed on the inner bottom wall of the housing (1), a lifting frame (52) connected to the piston rod of the lifting cylinder (51), a lower electric push rod (53) fixed inside the lifting frame (52), and a U-shaped frame (54) fixed on the top of the lifting frame (52). The lower end of the central column (4) is rotatably connected to the U-shaped frame (54), and the bottom of the pressure sensor is fixed to the upper end of the lower electric push rod (53). The control mechanism (5) also includes a drive shaft (55) fixed to the top of the pressure sensor and coaxially arranged with the central column (4). The lower end of the central column (4) is provided with a central hole (41). The inner wall of the central hole (41) is fixed with a spiral protrusion (42). The side wall of the drive shaft (55) is provided with a spiral groove (551) for the spiral protrusion (42) to slide and engage. The central column (4) is provided with an installation cavity (43), and the side wall of the central column (4) is provided with a side opening (44) communicating with the installation cavity (43). The detection component (6) includes a sliding block (61) that slides with the side wall of the central column (4) and a detection block (62) connected to the top of the sliding block (61). The central column (4) is provided with an operating component (8) for controlling the detection block (62) to reciprocate along the radial direction of the central column (4) to be received into the installation cavity (43) or moved out from the side opening (44). The central column (4) is provided with a placement cavity (45) and a connecting groove (46) connecting the placement cavity (45) and the installation cavity (43). The operating component (8) includes an upper electric push rod (81) fixed in the placement cavity (45), a lifting plate (82) fixed to the upper end of the upper electric push rod (81), and a drive rod (83) fixed to the top of the lifting plate (82). The lower section of the drive rod (83) is slidably engaged with the connecting groove (46), and the upper section of the drive rod (83) is inclined. The sliding block (61) is provided with an oblique through hole (611) for the upper section of the drive rod (83) to slide.

2. The motor end cover concentricity detection device according to claim 1, characterized in that: It also includes a clamping mechanism (3), which includes a drive assembly (31). The drive assembly (31) includes a clamping cylinder (311) fixed on the housing (1) and a drive plate (312) connected to the piston rod of the clamping cylinder (311). The drive plate (312) has two symmetrically arranged through holes (3121). The clamping mechanism (3) also includes a clamping assembly (32), which is symmetrically arranged in two sets. The clamping assembly (32) includes a swing arm (321) rotatably mounted on the top of the housing (1). The swing arm (321) of each set of clamping assemblies (32) has a swing arm (321) Each of the two clamping components (32) is provided with two parallel clamping components. The clamping component (32) also includes a connecting block (322) fixed on the swing arm (321), a transmission shaft (323) rotatably mounted on the top of the connecting block (322) and slidingly engaged with the through hole (3121), and a clamping rod (324) hinged to both swing arms (321). The line connecting the rotating shaft between the housing (1) and the two swing arms (321) is parallel to the line connecting the clamping rod (324) and the rotating shaft between the two swing arms (321). A clamping arc surface (3241) is provided on the side of the two clamping rods (324) that are close to each other.

3. The motor end cover concentricity detection device according to claim 2, characterized in that: It also includes a mounting ring (13) and a stabilizing mechanism (9). The mounting base (2) has a circular cross-section and a C-shaped longitudinal section extending toward the side away from the axis of the mounting hole (11). The bottom edge of the motor end cover (10) extends toward the side away from its axis. The bottom edge of the motor end cover (10) is provided with multiple screw holes (102). The mounting ring (13) is positioned between the U-shaped frame (54) and the mounting base (2). The stabilizing mechanism (9) includes a limiting component (91) on the mounting ring (13). The number of limiting components (91) is equal to the number of screw holes (102) and their positions correspond one-to-one. The limiting component (91) includes a limiting post (911) that passes through the screw hole (102). The limiting post (911) passes through the top and bottom of the mounting base (2) and slides. The side wall of the limiting post (911) is provided with a connecting port (9111). The limiting component (91) also includes a buckle (912) that slides with the connecting port (9111) and a spring (913) that is fixed to the inner wall of the connecting port (9111). The end of the spring (913) away from the axis of the mounting hole (11) is fixed to the side of the buckle (912) close to the axis of the mounting hole (11).

4. The motor end cover concentricity detection device according to claim 3, characterized in that: A telescopic sleeve (9112) is provided inside the connecting port (9111). The two ends of the telescopic sleeve (9112) are fixed to the buckle (912) and the inner wall of the connecting port (9111) respectively, and the spring (913) is sleeved on the outside of the telescopic sleeve (9112).

5. The motor end cover concentricity detection device according to claim 3, characterized in that: The mounting base (2) is provided with a retraction assembly (21) for driving the latch (912) to retract into the communication port (9111). The retraction assembly (21) includes a connecting plate (211) fixed to the outside of the mounting base (2), a retraction motor (212) fixed to the connecting plate (211), a drive gear (213) fixed to the output end of the retraction motor (212), a drive ring (214) sleeved on the outside of the mounting base (2) and rotatably connected thereto, and a drive ring (214) fixedly sleeved on the drive... The driven gear (215) meshes with the driving gear (213) on the moving ring (214) and the abutment rod (216) is fixed to the side of the buckle (912) away from the mounting hole (11). The end of the abutment rod (216) away from the mounting hole (11) is spherical. The driving ring (214) is provided with a plurality of V-shaped parts (2141) extending toward the inside of the mounting seat (2). The number of V-shaped parts (2141) is equal to the number of limiting posts (911) and their positions correspond one-to-one.

6. The motor end cover concentricity detection device according to claim 5, characterized in that: A mounting bracket (12) is fixed on the inner bottom wall of the housing (1). The stabilizing mechanism (9) also includes a lifting assembly (92) for controlling the lifting of the mounting ring (13). The lifting assembly (92) includes two sets of lifting units (921) symmetrically distributed on both sides of the U-shaped frame (54). The lifting unit (921) includes an upper horizontal plate (9211) fixed to the bottom of the mounting ring (13) and a lower horizontal plate (9211) fixed to the mounting bracket (12) and parallel to the upper horizontal plate (9211). 9212), a sliding sleeve (9213) slidably sleeved on the lower horizontal plate (9212), a first diagonal rod (9214) hinged between the top of the sliding sleeve (9213) and the bottom of the upper horizontal plate (9211), a sliding seat (9215) slidably installed on the bottom of the upper horizontal plate (9211), and a second diagonal rod (9216) hinged between the bottom of the sliding seat (9215) and the top of the lower horizontal plate (9212) and intersecting with the first diagonal rod (9214); The lifting assembly (92) also includes a power unit (922) for controlling the synchronous movement of the sliding sleeves (9213) of the two lifting units (921). The power unit (922) includes a transverse cylinder (9221) fixed on the mounting bracket (12) and a U-shaped plate (9222) connected to the piston rod of the transverse cylinder (9221). The two ends of the U-shaped plate (9222) are respectively fixed to the sliding sleeves (9213) of the two lifting units (921).

7. A method for detecting the concentricity of a motor end cover based on the motor end cover concentricity detection device according to any one of claims 1-6, characterized in that, Includes the following steps: S1. Place the end cap (10) of the motor to be tested on the mounting base (2) and connect and fix it; S2. The control mechanism (5) drives the central column (4) to move towards the end cover (10) of the motor to be tested, so that the detection piece (6) abuts against the inner wall of the hole (103) to be tested. The central column (4) rotates during the movement, and the resistance encountered by the central column (4) during rotation is monitored by the sensing component (7). S3. Based on the comparison results between the resistance data monitored by the sensing component (7) and the preset threshold, determine whether the concentricity of the motor end cover (10) is qualified. S4. After the test is completed, the control mechanism (5) drives the central column (4) to reset and remove the motor end cover (10).

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