Starting motor stator pole shoe run-out detection device

Abstract

The utility model discloses a starting motor stator pole shoe run-out detection device, which belongs to the technical field of rapid detection after starting motor stator processing, and comprises a base and a detection module, the top of the base is provided with a positioning disc and a rotating disc, and the upper end face of the rotating disc is provided with a circular mounting groove; the detection module comprises linear sliding rails, each linear sliding rail is provided with a sliding table and a transmission plate, one end of each transmission plate in the length direction is vertically provided with a measuring rod, and each transmission plate is provided with a measuring device. According to the invention, an expensive three-coordinate measuring machine and a complex clamp design are not needed, the detection cost is greatly reduced, instant detection of stator pole shoe jumping is realized, the tedious process of sending a stator to a detection department in a traditional detection mode is avoided, the detection period is obviously shortened, and the production efficiency is improved.

Description

Technical Field

[0001] This utility model belongs to the field of rapid testing technology after the stator of a starter motor is processed, and in particular relates to a device for detecting the runout of the stator pole shoes of a starter motor. Background Technology

[0002] In the manufacturing process of starter motors, the welding of the stator housing to the pole shoes is a crucial step. The pole shoes are typically installed inside the stator housing and secured using a welding process. This unique location makes the welding operation quite complex and challenging. Due to space constraints and obstructed visibility, precisely controlling the welding quality becomes particularly difficult. Common welding problems include, but are not limited to, uneven welds, weak weld joints, and coaxiality deviations between the pole shoes and the stator housing.

[0003] Among these issues, the misalignment or excessive runout between the inner circumference of the pole shoe and the outer circumference of the stator stop is of particular concern. This deviation directly affects the operational stability and efficiency of the starter motor. Specifically, when the runout of the inner circumference of the pole shoe exceeds the allowable range, it leads to uneven clearance between the rotor and stator during rotation, resulting in vibration, noise, and additional wear. Over long-term operation, these problems not only shorten the motor's lifespan but may also cause serious mechanical failures.

[0004] To detect the runout of the inner circle of the pole shoes, the traditional approach is to send the stator to an inspection department equipped with a coordinate measuring machine (CMM) for precise measurement after welding. CMMs, with their high precision and versatility, hold an important position in the field of precision measurement. However, this inspection method has several significant limitations. First, CMMs are bulky and expensive, and are usually not directly installed on the production line but exist as independent inspection devices. This means that the stator needs to be removed from the production line and transported to the inspection department for each inspection, which not only increases logistics costs but also extends the inspection cycle. Second, because the pole shoes are located inside the stator, CMMs face significant challenges in sampling points, often requiring the design of complex fixtures and probe paths, further increasing inspection time and costs.

[0005] Therefore, developing a device capable of quickly and accurately detecting stator pole shoe runout in starter motors on the production floor is of paramount importance. Such a device would not only improve detection efficiency and reduce production interruptions but also effectively lower detection costs and enhance overall production efficiency. Utility Model Content

[0006] To address the aforementioned problems in the prior art, this utility model aims to provide a starter motor stator pole shoe runout detection device, which solves the problems of difficulty and low efficiency caused by the reliance on a coordinate measuring machine in the existing starter motor stator pole shoe runout detection technology.

[0007] To achieve the above-mentioned utility model objectives, the technical solution adopted by this utility model is as follows: A starting motor stator pole shoe runout detection device is provided, which includes a base and at least one detection module. A positioning disk is provided on the top of the base, and a rotating disk is coaxially rotatably provided on the upper end face of the positioning disk. A circular mounting groove for fixing the bottom of the stator housing is provided on the upper end face of the rotating disk. A circular channel is provided in the middle of both the positioning disk and the rotating disk.

[0008] The detection module includes at least one linear slide rail mounted on the base. The length direction of each linear slide rail is parallel to the diameter direction of the positioning plate. Each linear slide rail is equipped with a slide table. A transmission plate is connected to the upper end face of each slide table. Each transmission plate is set along the length direction of the linear slide rail. A measuring rod is vertically set at one end of the length direction of each transmission plate. A measuring device is set at the other end of the length direction of each transmission plate. The probe of each measuring device is used to contact the end face of the other end of the length direction of the transmission plate.

[0009] The tip of each measuring rod passes through a circular channel inside the stator housing, and the tip of each measuring rod is equipped with a measuring head for making tight contact with the inner wall of the pole shoe inside the stator housing.

[0010] The working principle of the above-mentioned stator pole shoe runout detection device for starter motors is as follows: In use, the stator housing after welding the pole shoes is first installed and fixed in the circular mounting groove. The measuring head at the top of the measuring rod will be in close contact with the inner wall of the pole shoe inside the stator housing. At the same time, the measuring device is set up and the probe of the measuring device is in contact with the other end face of the transmission plate along its length. Then, the rotating disk is rotated, which drives the pole shoe inside the stator housing to rotate around its own axis. When the pole shoe is misaligned or the runout is too large, the measuring rod transmits the misalignment or excessive runout to the transmission plate and the measuring device in contact with the transmission plate. The measuring device reading is manually observed and its runout is confirmed to determine the coaxiality deviation between the pole shoe and the stator housing.

[0011] Furthermore, as a specific cooperation method between the positioning disk and the rotating disk, the positioning disk has a circular structure, and the rotating disk has a stepped shaft structure. The bottom of the rotating disk is located inside the positioning disk, and the stepped surface of the rotating disk is rotatably engaged with the upper end surface of the positioning disk by setting a tapered roller bearing. Multiple rotating handles are set on the outer circumference of the rotating disk. The setting of multiple rotating handles facilitates the rotation of the rotating disk and realizes the detection of stator pole shoe runout of the starter motor.

[0012] Furthermore, there are three linear guide rails, with an included angle of 120° between them. The three measuring rods connected to the transmission plates on the three linear guide rails are all at different heights. Each linear guide rail is equipped with a measuring rod of a different height. By setting multiple measuring rods, the runout inside the pole shoes at different heights can be detected.

[0013] Furthermore, the measuring head is rotatably connected to the top of the measuring rod. The measuring head has a circular structure, and the outer circumference of the measuring head is in close contact with the inner wall of the pole shoe inside the stator housing. The measuring head can rotate around the central axis of the measuring rod.

[0014] Furthermore, the measuring device is a dial indicator or a micrometer, with the probe of the dial indicator or micrometer in contact with the end face of the transmission plate along its length. A dial indicator or micrometer can be flexibly applied according to the required testing accuracy.

[0015] Furthermore, as a specific method of fixing the measuring device, a fixing plate is provided at the other end of the length direction of each transmission plate, and a measuring device is fixed on each fixing plate.

[0016] Furthermore, each fixed plate has a protective device on its side wall near the transmission plate. This device includes an adjusting bolt and a locking nut. The tail end of the adjusting bolt is threaded to the side wall of the fixed plate, and the head end is used to contact the other end face of the transmission plate along its length. This protective device protects the measuring device. The specific principle is as follows: when the coaxiality deviation of the pole shoes is too large, it will cause excessive displacement of the transmission plate. By adjusting the extension length of the adjusting bolt, when the transmission plate experiences excessive displacement, it will contact the head end of the adjusting bolt, preventing the transmission plate from continuing to contact the probe of the measuring device, thus protecting the measuring device.

[0017] Furthermore, a spring seat is provided on the upper surface of the base, located at the center of the circular channel. Three thrust springs are mounted on the spring seat, with one thrust spring corresponding to each measuring rod. One end of each thrust spring is fixedly connected to the spring seat, and the other end is fixedly connected to the bottom of the measuring rod. The thrust springs exert an outward force on the measuring rods, ensuring that the measuring head at the tip of each measuring rod is in close contact with the inner wall of the pole shoe inside the stator housing, thus guaranteeing measurement accuracy.

[0018] Furthermore, as a specific fixing method for the thrust spring, the spring seat has a cylindrical structure, and three thrust springs are provided on the outer circumference of the spring seat, each of which is a cylindrical spring; the bottom of each measuring rod passes through the transmission plate, and a locking hole for connecting with the outer circumference of the measuring rod is provided on one side wall of the transmission plate, and a locking screw is provided in the locking hole; the bottom of the measuring rod is provided with an installation and connection platform; the other end of the thrust spring is fixedly connected to the bottom of the measuring rod through the installation and connection platform.

[0019] Compared with the existing method of using a coordinate measuring machine to detect the stator pole shoe runout of a starter motor, the advantages of this invention are as follows:

[0020] 1. The stator pole shoe runout detection device for starter motors disclosed in this utility model is compact in design and easy to install on the production line, enabling real-time detection of stator pole shoe runout. This avoids the cumbersome process of sending the stator to the testing department in traditional testing methods, significantly shortening the testing cycle and improving production efficiency.

[0021] 2. The starter motor stator pole shoe runout detection device of this utility model, compared with traditional detection methods, eliminates the need for expensive coordinate measuring machines and complex fixture designs, greatly reducing detection costs. Simultaneously, the improved detection efficiency also reduces production losses caused by detection delays.

[0022] 3. The starter motor stator pole shoe runout detection device of this utility model is flexibly designed and can be customized and adjusted according to different models and specifications of starter motor stators. This enables it to adapt to diverse production needs and improves the versatility and practicality of the equipment. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural schematic diagram of a starter motor stator pole shoe runout detection device.

[0024] Figure 2 This is a three-dimensional structural diagram of the stator housing mounted on the testing device.

[0025] Figure 3 This is a schematic diagram of the installation structure of a linear guide rail.

[0026] The components include: 1. Base; 2. Detection module; 21. Linear slide rail; 22. Slide table; 23. Transmission plate; 24. Measuring rod; 25. Measuring device; 26. Measuring head; 3. Positioning plate; 4. Rotating plate; 5. Stator housing; 6. Circular mounting slot; 7. Circular channel; 8. Tapered roller bearing; 9. Fixing plate; 10. Adjusting bolt; 11. Locking nut; 12. Spring seat; 13. Thrust spring; 14. Locking hole; 15. Mounting connection platform; 16. Rotating handle. Detailed Implementation

[0027] The specific embodiments of this utility model are described below to enable those skilled in the art to understand this utility model. However, it should be understood that this utility model is not limited to the scope of the specific embodiments. For those skilled in the art, as long as various changes are within the spirit and scope of this utility model as defined and determined by the appended claims, these changes are obvious. All utility model creations utilizing the concept of this utility model are within the scope of protection.

[0028] like Figures 1-3As shown, this utility model provides a starter motor stator pole shoe runout detection device, which includes a base 1 and a detection module 2.

[0029] A positioning disk 3 is provided on the top of the base 1. A rotating disk 4 is coaxially rotatably mounted on the upper surface of the positioning disk 3. Specifically, as a specific cooperation method between the positioning disk 3 and the rotating disk 4, the positioning disk 3 has a disc structure, and the rotating disk 4 has a stepped shaft structure. The bottom of the rotating disk 4 is located inside the positioning disk 3. The stepped surface of the rotating disk 4 is rotatably engaged with the upper surface of the positioning disk 3 by setting a tapered roller bearing 8. Multiple rotating handles 16 are provided on the outer circumference of the rotating disk 4. The multiple rotating handles 16 facilitate the rotation of the rotating disk 4 to realize the detection of stator pole shoe runout of the starter motor.

[0030] The upper end face of the rotating disk 4 is provided with a circular mounting groove 6 for fixing the bottom of the stator housing 5. Specifically, the size of the circular mounting groove 6 can be customized and adjusted according to different models and specifications of starter motor stators, which enables it to adapt to diverse production needs and improves the versatility and practicality of the equipment; both the positioning disk 3 and the rotating disk 4 are provided with a circular channel 7 in the middle.

[0031] The detection module 2 includes three linear slide rails 21 mounted on the base 1, with an included angle of 120° between them. The length direction of each linear slide rail 21 is parallel to the diameter direction of the positioning disk 3. Each linear slide rail 21 is equipped with a slide table 22, and a transmission plate 23 is connected to the upper end face of each slide table 22. Each transmission plate 23 is positioned along the length direction of the linear slide rail 21. A measuring rod 24 is vertically mounted at one end of each transmission plate 23, and a measuring device 25, which is a dial indicator or a micrometer, is mounted at the other end of each transmission plate 23. The probe of the dial indicator or micrometer is in contact with the end face of the transmission plate 23 along its length. A dial indicator or micrometer can be flexibly applied according to the required detection accuracy.

[0032] The probe of each measuring device 25 is used to contact the end face of the transmission plate 23 along its length. The tip of each measuring rod 24 passes through the circular channel 7 and is located inside the stator housing 5. The tip of each measuring rod 24 is provided with a measuring head 26 for abutting against the inner wall of the pole shoe inside the stator housing 5.

[0033] The three measuring rods 24 connected to the transmission plates 23 on the three linear slide rails 21 are all at different heights. Each linear slide rail 21 is equipped with a measuring rod 24 of different heights. By setting multiple measuring rods 24, the runout inside the pole shoes at different heights can be detected.

[0034] Specifically, the measuring head 26 is rotatably connected to the top of the measuring rod 24. The measuring head 26 has a circular structure. The outer circumference of the measuring head 26 is in close contact with the inner wall of the pole shoe inside the stator housing 5. The measuring head 26 can rotate around the central axis of the measuring rod 24.

[0035] As a specific fixing method for the measuring device 25, a fixing plate 9 is provided at the other end of the length direction of each transmission plate 23, and a measuring device 25 is fixed on each fixing plate 9.

[0036] Each fixed plate 9 has a protective device on its side wall near the transmission plate 23. The protective device includes an adjusting bolt 10 and a locking nut 11 on the adjusting bolt 10. The tail end of the adjusting bolt 10 is threaded to the side wall of the fixed plate 9, and the head end of the adjusting bolt 10 is used to contact the other end face of the transmission plate 23 along its length. The protective device protects the measuring device 25. The specific principle is as follows: when the coaxiality deviation of the pole shoes is too large, it will cause excessive displacement of the transmission plate 23. By adjusting the extension length of the adjusting bolt 10, when the transmission plate 23 experiences excessive displacement, it will contact the head end of the adjusting bolt 10, preventing the transmission plate 23 from continuing to contact the probe of the measuring device 25, thus protecting the measuring device 25.

[0037] A spring seat 12 is also provided on the upper surface of the base 1. The spring seat 12 is located at the center of the circular channel 7. Three thrust springs 13 are provided on the spring seat 12. Each measuring rod 24 is matched with one thrust spring 13. One end of the thrust spring 13 is fixedly connected to the spring seat 12, and the other end is fixedly connected to the bottom of the measuring rod 24. The thrust springs 13 provide an outward thrust to the measuring rod 24, so that the measuring head 26 at the top of each measuring rod 24 is in close contact with the inner wall of the pole shoe inside the stator housing 5, ensuring measurement accuracy.

[0038] Specifically, as a specific fixing method for the thrust spring 13, the spring seat 12 has a cylindrical structure, and three thrust springs 13 are provided on the outer circumference of the spring seat 12, each of which is a cylindrical spring; the bottom of each measuring rod 24 passes through the transmission plate 23, and a locking hole 14 is provided on one side wall of the transmission plate 23 for connecting with the outer circumference of the measuring rod 24. A locking screw is provided in the locking hole 14 to achieve a fixed connection between the measuring rod 24 and the transmission plate 23. The bottom of the measuring rod 24 is provided with a mounting connection platform 15; the other end of the thrust spring 13 is fixedly connected to the bottom of the measuring rod 24 through the mounting connection platform 15.

[0039] When testing the stator pole shoe runout of the starter motor, the stator housing 5, after welding the pole shoes, is first installed and fixed in the circular mounting groove 6. The measuring head 26 at the top of the measuring rod 24 will be in close contact with the inner wall of the pole shoe inside the stator housing 5. At the same time, the measuring device 25 is set up and the probe of the measuring device 25 is in contact with the other end face of the transmission plate 23 along its length. Then, the rotating disk 4 is rotated, which drives the pole shoe inside the stator housing 5 to rotate around its own axis. When the pole shoe is misaligned or the runout is too large, the measuring rod 24 transmits the misalignment or excessive runout to the transmission plate 23 and the measuring device 25 in contact with the transmission plate 23. The reading of the measuring device 25 is manually observed and its runout is confirmed to determine the coaxiality deviation between the pole shoe and the stator housing 5.

[0040] This invention discloses a starter motor stator pole shoe runout detection device. Its compact design makes it easy to install on the production line, eliminating the need for expensive coordinate measuring machines and complex fixture designs, thus significantly reducing testing costs and enabling real-time detection of stator pole shoe runout. This avoids the cumbersome process of sending the stator to the testing department, as required by traditional testing methods, significantly shortening the testing cycle, improving production efficiency, and reducing production losses caused by testing delays.

[0041] In summary, the starter motor stator pole shoe runout detection mechanism of this utility model has significant beneficial effects in solving existing technical problems, improving detection efficiency and accuracy, and reducing costs, and is of great significance for enhancing the overall competitiveness of the starter motor manufacturing industry.

Claims

1. A device for detecting stator pole shoe runout of a starter motor, characterized in that, The device includes a base and a detection module. A positioning plate is provided on the top of the base. A rotating plate is rotatably mounted on the upper surface of the positioning plate. A circular mounting groove for fixing the bottom of the stator housing is provided on the upper surface of the rotating plate. A circular channel is provided in the middle of both the positioning plate and the rotating plate. The detection module includes at least one linear slide rail mounted on the base. The length direction of each linear slide rail is parallel to the diameter direction of the positioning disk. Each linear slide rail is equipped with a slide table. A transmission plate is connected to the upper end face of each slide table. Each transmission plate is arranged along the length direction of the linear slide rail. A measuring rod is vertically arranged at one end of the length direction of each transmission plate. A measuring device is arranged at the other end of the length direction of each transmission plate. The probe of each measuring device is used to contact the end face of the other end of the length direction of the transmission plate. The tip of each measuring rod passes through the circular channel and is located inside the stator housing. The tip of each measuring rod is provided with a measuring head for abutting against the inner wall of the pole shoe inside the stator housing.

2. The starter motor stator pole shoe runout detection device according to claim 1, characterized in that, The positioning disk has a circular structure, and the rotating disk has a stepped shaft structure. The bottom of the rotating disk is located inside the positioning disk, and the stepped surface of the rotating disk is rotatably engaged with the upper end surface of the positioning disk by means of tapered roller bearings. Multiple rotating handles are provided on the outer circumference of the rotating disk.

3. The starter motor stator pole shoe runout detection device according to claim 1, characterized in that, The number of linear slide rails is three, and the included angle between the three linear slide rails is 120°.

4. The starter motor stator pole shoe runout detection device according to claim 3, characterized in that, The heights of the three measuring rods connected to the transmission plates on the three linear slide rails are all different.

5. The starter motor stator pole shoe runout detection device according to claim 1, characterized in that, The measuring head is rotatably connected to the top of the measuring rod. The measuring head has a circular structure, and the outer circumference of the measuring head is in close contact with the inner wall of the pole shoe inside the stator housing. The measuring head can rotate around the central axis of the measuring rod.

6. The starter motor stator pole shoe runout detection device according to claim 3, characterized in that, The measuring device is a dial indicator or a micrometer, and the probe of the dial indicator or micrometer is in contact with the end face of the other end of the transmission plate along its length.

7. The starter motor stator pole shoe runout detection device according to claim 6, characterized in that, Each of the transmission plates has a fixing plate at the other end along its length, and each fixing plate has a measuring device fixed thereon.

8. The starter motor stator pole shoe runout detection device according to claim 7, characterized in that, Each of the fixed plates is provided with a protective device on the side wall near the transmission plate. The protective device includes an adjusting bolt and a locking nut on the adjusting bolt. The tail end of the adjusting bolt is threaded to the side wall of the fixed plate, and the head end of the adjusting bolt is used to contact the end face of the other end of the transmission plate in the length direction.

9. The starter motor stator pole shoe runout detection device according to claim 8, characterized in that, The upper surface of the base is also provided with a spring seat, which is located at the center of the circular channel. Three thrust springs are provided on the spring seat, and each measuring rod is matched with one of the thrust springs. One end of the thrust spring is fixedly connected to the spring seat, and the other end is fixedly connected to the bottom of the measuring rod.

10. The starter motor stator pole shoe runout detection device according to claim 9, characterized in that, The spring seat has a cylindrical structure, and three thrust springs are provided on the outer circumference of the spring seat. Each thrust spring is a cylindrical spring. The bottom of each measuring rod passes through the transmission plate. A locking hole for connecting with the outer circumference of the measuring rod is provided on one side wall of the transmission plate. A locking screw is provided in the locking hole. An installation and connection platform is provided at the bottom of the measuring rod. The other end of the thrust spring is fixedly connected to the bottom of the measuring rod through the installation and connection platform.

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