Dispensing tool for stepping motor rotor

Abstract

The utility model discloses a dispensing tool for a stepping motor rotor, which is used for assisting the dispensing assembly of a magnetic ring and a rotating shaft of the stepping motor rotor, the dispensing tool comprises a bottom plate and a fixing plate, the fixing plate is arranged on the bottom plate, the bottom plate is provided with a limiting groove, and the limiting groove is arranged on the fixing plate. The groove depth of the limiting groove is equal to the shaft extension length of the rotating shaft extending out of the magnetic ring, the fixing plate is provided with a positioning hole corresponding to the limiting groove, and the hole diameter of the positioning hole is larger than the groove width of the limiting groove so that the positioning hole can be matched with the limiting groove to form a stepped groove. The dispensing tool is simple in structure and high in machining precision, the limiting groove is of a groove structure, the machining difficulty is reduced, the groove depth consistency can be guaranteed, the shaft extension length tolerance of the stepping motor rotor is effectively reduced, and the assembly precision and production efficiency of the stepping motor rotor are remarkably improved.

Description

Technical Field

[0001] This utility model relates to the field of motor manufacturing tooling technology, and in particular to a dispensing tooling for a stepper motor rotor. Background Technology

[0002] In the stepper motor manufacturing industry, the conventional production process for rotor assemblies includes the dispensing of adhesive to the shaft and magnetic ring. This process requires specialized tooling with multiple stepped grooves to meet the needs of mass production, and these grooves ensure the accuracy of the shaft extension dimensions. The tooling typically uses a one-piece plate with multiple stepped holes drilled into it to achieve low-cost, high-efficiency processing. However, existing tooling suffers from poor machining accuracy of the stepped holes, resulting in inconsistent drilling depths. This leads to inconsistent shaft extension lengths in the stepper motor rotor, causing dimensional deviations that can result in shaft extension parameters exceeding acceptable ranges in batches. This, in turn, affects the control accuracy of gear assembly height for downstream customers, ultimately leading to inconsistent meshing in the transmission system and impacting the quality of the stepper motor product. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a dispensing fixture for a stepper motor rotor, so as to solve the problems of poor machining accuracy of stepped holes and low uniformity of groove depth in existing fixtures.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: a dispensing fixture for a stepper motor rotor, used to assist in the dispensing assembly of the magnetic ring and the shaft of the stepper motor rotor, including a base plate and a fixing plate, wherein the fixing plate is disposed on the base plate, and the base plate is provided with a limiting groove, the depth of the limiting groove being equal to the shaft extension length of the shaft extending out of the magnetic ring, and the fixing plate is provided with a positioning hole corresponding to the limiting groove, wherein the diameter of the positioning hole is larger than the width of the limiting groove, so that the positioning hole and the limiting groove cooperate to form a stepped groove.

[0005] Furthermore, the limiting groove is a through groove, and the limiting groove connects the opposite sides of the bottom plate.

[0006] Furthermore, the fixing plate is provided with a plurality of positioning holes along the length direction of the through groove.

[0007] Furthermore, the limiting groove includes a first through groove and a second through groove, the first through groove extending along the width direction of the base plate, and the second through groove extending along the length direction of the base plate.

[0008] Furthermore, the bottom of the limiting groove is a grinding surface.

[0009] Furthermore, the shape of the positioning hole is adapted to the shape of the magnetic ring.

[0010] Furthermore, it also includes a rubber pad and a first bolt. The rubber pad is located on the side of the base plate away from the fixing plate. The base plate has a screw hole, and the rubber pad has a mounting hole. The first bolt passes through the mounting hole and is threadedly connected to the screw hole.

[0011] Furthermore, the fixing plate is detachably mounted on the base plate.

[0012] Furthermore, it also includes a fastening assembly, one end of which is detachably connected to the base plate, and the other end of which presses against the fixing plate.

[0013] Furthermore, the fastening assembly includes a second bolt, the base plate has a screw hole, the fixing plate has a through hole corresponding to the screw hole, and the second bolt passes through the through hole and is threadedly connected to the screw hole.

[0014] The beneficial effects of this utility model are as follows: The dispensing fixture for a stepper motor rotor provided by this utility model has limiting grooves and positioning holes on the base plate and the fixed plate, respectively. The limiting grooves and positioning holes cooperate to form a stepped groove. The magnetic ring is placed in the positioning hole and is axially positioned by the surface of the base plate. The rotating shaft extends into the magnetic ring and is axially positioned by the limiting groove. This dispensing fixture can effectively improve the consistency of the shaft extension length of the rotating shaft extending into the magnetic ring. The dispensing fixture has a simple structure and high machining accuracy. The limiting groove is a recessed structure, which reduces machining difficulty and ensures consistent groove depth, effectively reducing the tolerance of the stepper motor rotor's shaft extension length and significantly improving the assembly accuracy and production efficiency of the stepper motor rotor. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the dispensing fixture described in one embodiment of the present invention;

[0016] Figure 2 for Figure 1 A cross-sectional view of the dispensing fixture shown;

[0017] Figure 3 for Figure 1 The exploded view of the dispensing fixture shown is shown.

[0018] Figure 4 for Figure 1 The shown is a cross-sectional view of the dispensing fixture in use.

[0019] Figure 5 For application Figure 1 A schematic diagram of the stepper motor rotor of the dispensing fixture shown;

[0020] Figure 6This schematically illustrates an existing stepper motor rotor dispensing fixture.

[0021] Label Explanation:

[0022] 1. Magnetic ring; 2. Rotating shaft; 3. Base plate; 31. Limiting groove; 311. First through groove; 312. Second through groove; 32. Screw hole; 4. Fixing plate; 41. Positioning hole; 42. Through hole; 5. Stepped groove; 6. Rubber pad; 61. Mounting hole; 7. First bolt; 8. Second bolt; 9. Stepped hole. Detailed Implementation

[0023] To explain in detail the technical content, objectives, and effects of this utility model, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0024] Please refer to Figures 1 to 5 A dispensing fixture for a stepper motor rotor is used to assist in the dispensing assembly of the magnetic ring 1 and the rotating shaft 2 of the stepper motor rotor. It includes a base plate 3 and a fixing plate 4. The fixing plate 4 is disposed on the base plate 3. The base plate 3 is provided with a limiting groove 31. The fixing plate 4 is provided with a positioning hole 41 corresponding to the limiting groove 31. The diameter of the positioning hole 41 is larger than the groove width of the limiting groove 31, so that the positioning hole 41 and the limiting groove 31 cooperate to form a stepped groove 5. As described above, the beneficial effects of this utility model are as follows: The stepper motor rotor dispensing fixture provided by this utility model has a limiting groove 31 and a positioning hole 41 respectively on the base plate 3 and the fixed plate 4, and the limiting groove 31 and the positioning hole 41 cooperate to form a stepped groove 5. The magnetic ring 1 is placed in the positioning hole 41 and is axially positioned by the surface of the base plate 3 near the fixed plate 4. The rotating shaft 2 extends into the magnetic ring 1 and is axially positioned by the limiting groove 31. This stepper motor rotor dispensing fixture can effectively improve the consistency of the shaft extension length of the rotating shaft 2 extending into the magnetic ring 1. The stepper motor rotor dispensing fixture has a simple structure and high processing accuracy. The limiting groove 31 is a groove structure, which reduces the processing difficulty and ensures the consistency of the groove depth, effectively reducing the shaft extension length tolerance of the stepper motor rotor and significantly improving the assembly accuracy and production efficiency of the stepper motor rotor.

[0025] Furthermore, the limiting groove 31 is a through groove, and the limiting groove 31 connects the opposite sides of the bottom plate 3.

[0026] As can be seen from the above description, the limiting groove 31 is designed as a through groove, which not only facilitates the milling cutter to process it, but also makes it convenient for the operator to grind the limiting groove 31, thus ensuring the processing accuracy of the dispensing fixture.

[0027] Furthermore, the fixing plate 4 is provided with a plurality of positioning holes 41 along the length direction of the through groove.

[0028] Furthermore, the limiting groove 31 includes a first through groove 311 and a second through groove 312, the first through groove 311 extending along the width direction of the base plate 3, and the second through groove 312 extending along the length direction of the base plate 3.

[0029] As described above, this dispensing fixture can perform batch processing and ensure the consistency of the shaft extension of the stepper motor rotors in batch processing, thereby ensuring the assembly accuracy and production efficiency of the stepper motor rotors.

[0030] Furthermore, the bottom of the limiting groove 31 is a grinding surface.

[0031] As described above, after the milling process is completed, the limiting groove 31 can be ground to ensure that the groove depth tolerance is within ±0.01mm, thereby improving the stepper motor rotor shaft extension accuracy when using this dispensing fixture.

[0032] Furthermore, the shape of the positioning hole 41 is adapted to the shape of the magnetic ring 1.

[0033] As described above, the receiving groove can radially position the magnetic ring 1. The dispensing fixture can achieve three-level positioning of the stepper motor rotor by radially positioning the magnetic ring 1, axially positioning the magnetic ring 1, and axially positioning the rotating shaft 2, thereby ensuring high-precision assembly of the stepper motor rotor.

[0034] Furthermore, it also includes a rubber pad 6 and a first bolt 7. The rubber pad 6 is located on the side of the base plate 3 away from the fixing plate 4. The base plate 3 has a screw hole 32, and the rubber pad 6 has a mounting hole 61. The first bolt 7 passes through the mounting hole 61 and is threadedly connected to the screw hole 32.

[0035] As described above, the rubber pad 6 can prevent the dispensing fixture from slipping, and when the dispensing fixture is placed on the placement surface, the rubber pad 6 can create a gap between the placement surface and the base plate 3, making it easy to handle.

[0036] Furthermore, the fixing plate 4 is detachably mounted on the base plate 3.

[0037] As described above, the fixing plate 4 and the base plate 3 are detachable, so that the operator can easily clean the dispensing fixture and remove foreign matter such as residual glue generated during the dispensing process.

[0038] Furthermore, it also includes a fastening assembly, one end of which is detachably connected to the base plate 3, and the other end of which presses against the fixing plate 4.

[0039] As described above, the fastening assembly can ensure that the base plate 3 and the fixing plate 4 fit together, thereby improving the positioning accuracy of the dispensing fixture for the magnetic ring 1 and the rotating shaft 2, and further reducing the tolerance of the stepper motor rotor shaft extension.

[0040] Furthermore, the fastening assembly includes a second bolt 8, the base plate 3 is provided with a screw hole 32, the fixing plate 4 is provided with a through hole 42 corresponding to the screw hole 32, and the second bolt 8 passes through the through hole 42 and is threadedly connected to the screw hole 32.

[0041] As described above, the base plate 3 and the fixing plate 4 are locked together by the second bolt 8, which not only facilitates the installation and disassembly of the base plate 3 and the fixing plate 4, but also ensures the positioning accuracy of the base plate 3 and the fixing plate 4.

[0042] Example 1

[0043] Please refer to Figures 1 to 5 The first embodiment of this utility model is as follows: a dispensing fixture for a stepper motor rotor is provided to solve the problems of difficult processing of the stepped hole 9 and low uniformity of groove depth in existing fixtures.

[0044] Please refer to the following first. Figure 6 The illustration schematically shows an existing tooling structure for the dispensing process of stepper motor rotors. The existing tooling drills multiple stepped holes 9 on a one-piece molded plate. The inconsistent depth of each stepped hole 9 results in inconsistent shaft extension lengths of the stepper motor rotors after dispensing, thus affecting the dimensions of the stepper motor rotors. Furthermore, during the dispensing process, burrs easily form on the stepped surfaces of the stepped grooves 5, or residual adhesive and other foreign matter can easily fall into the stepped grooves 5 and be difficult to clean, further increasing the shaft extension tolerances of the stepper motor rotors.

[0045] Please refer to Figure 3 The dispensing fixture provided in this embodiment includes a base plate 3 and a fixing plate 4. The fixing plate 4 is disposed on the base plate 3. The base plate 3 is provided with a limiting groove 31. The fixing plate 4 is provided with a positioning hole 41 corresponding to the limiting groove 31. The diameter of the positioning hole 41 is larger than the groove width of the limiting groove 31, so that the positioning hole 41 and the limiting groove 31 cooperate to form a stepped groove 5.

[0046] The dispensing fixture provided in this embodiment includes a base plate 3 and a fixing plate 4. The fixing plate 4 has a drilled hole 41 for sliding mating with the magnetic ring 1; specifically, the shape of the positioning hole 41 matches the shape of the magnetic ring 1, so that the positioning hole 41 can effectively position and fix the magnetic ring 1. A limiting groove 31 is milled on the base plate 3. The limiting groove 31 is a conventional straight groove structure, rather than a stepped groove structure. The straight groove structure is easier to machine and makes it easier to control the groove depth machining accuracy.

[0047] The dispensing fixture is formed by the cooperation of the limiting groove 31 and the positioning hole 41 to form a stepped groove 5. When the magnetic ring 1 is placed in the positioning hole 41, since the diameter of the positioning hole 41 is larger than the groove width of the limiting groove 31, the side wall of the base plate 3 near the fixing plate 4 can play an axial positioning role for the magnetic ring 1. The limiting groove 31 forms a limiting space below the magnetic ring 1. After the rotating shaft 2 is dispensed with glue, it can be assembled into the magnetic ring 1. The rotating shaft 2 passes through the magnetic ring 1 and extends into the limiting groove 31 until the end of the rotating shaft 2 abuts against the bottom of the limiting groove 31. At this time, the shaft extension length L of the rotating shaft 2 extending out of the magnetic ring 1 is equal to the groove depth D of the limiting groove 31.

[0048] Because the limiting groove 31 of the base plate 3 has the advantages of low processing difficulty and high processing accuracy, the groove depth of multiple limiting grooves 31 on the base plate 3 is highly consistent, which can correspondingly improve the consistency of the shaft extension length of the stepper motor rotor using this dispensing fixture.

[0049] Preferably, the limiting groove 31 can be a through groove provided on the base plate 3, and the limiting groove 31 connects the opposite sides of the base plate 3. This facilitates both milling and grinding of the through groove, ensuring the depth tolerance of the final tooling formed on the base plate 3, improving the dimensional accuracy of the dispensing tooling, and thus improving the shaft extension accuracy of the stepper motor rotor using this dispensing tooling. Correspondingly, the fixing plate 4 is provided with multiple positioning holes 41 along the length of the through groove to meet the application requirements of batch processing of stepper motor rotors using the dispensing tooling.

[0050] In detail, both the base plate 3 and the fixing plate 4 can be made of heat-treated materials with a hardness of HRC≥55℃. The positioning hole 41 on the fixing plate 4 can be precision machined to ensure a smooth surface and avoid the hole from shaking due to long-term wear from sliding with the magnetic ring, which would affect the accuracy. After the milling process is completed, the base plate 3 can be ground on both sides and then the limiting groove 31 can be ground to form a grinding surface at the bottom of the limiting groove 31, ensuring that the groove depth tolerance is within ±0.01mm, thereby improving the stepper motor rotor shaft extension accuracy when using this dispensing fixture.

[0051] In order to improve the efficiency of the dispensing process of the dispensing fixture, the limiting groove 31 includes a first through groove 311 and a second through groove 312. The first through groove 311 extends through the width direction of the base plate 3, and the second through groove 312 extends through the length direction of the base plate 3.

[0052] On the one hand, the processing positions on the dispensing fixture are reasonably distributed, and the dispensing fixture can perform dispensing processes on a larger number of stepper motor rotors at the same time; on the other hand, the base plate 3 of the dispensing fixture is provided with a horizontal and vertical through-type limiting groove 31, which makes it easier to clean the limiting groove 31.

[0053] In this embodiment, the fixing plate 4 is detachably mounted on the base plate 3 to facilitate cleaning of the dispensing fixture and prevent foreign objects such as residual glue during the dispensing process from easily falling into the stepped groove 5 and affecting the shaft extension tolerance of the stepper motor rotor.

[0054] Please refer to further details. Figure 3 In this embodiment, the dispensing fixture also includes a fastening component. One end of the fastening component is detachably connected to the base plate 3, and the other end presses against the fixing plate 4 to ensure that the fixing plate 4 and the base plate 3 fit tightly together, reduce the gap between the fixing plate 4 and the base plate 3, and improve the processing accuracy of the stepper motor rotor using the dispensing fixture.

[0055] A rubber pad 6 is provided on the side of the base plate 3 away from the fixed plate 4. The rubber pad 6 can play a non-slip role for the dispensing fixture, and when the dispensing fixture is placed on the placement surface, the rubber pad 6 can make a gap between the placement surface and the base plate 3, making it easy to pick up.

[0056] Specifically, the base plate 3 is provided with screw holes 32, and the rubber pad 6 is provided with mounting holes 61. The rubber pad 6 and the base plate 3 are locked together by the first bolt 7. The first bolt 7 passes through the mounting hole 61 and is threadedly connected to the screw hole 32.

[0057] The fastening component can be a fastening clamp or other device with fastening function.

[0058] In this embodiment, the fastening assembly includes a second bolt 8, a screw hole 32 is provided on the base plate 3, and a through hole 42 is provided on the fixing plate 4 corresponding to the screw hole 32. The second bolt 8 passes through the through hole 42 and is threadedly connected to the screw hole 32. The nut of the second bolt 8 presses against the fixing plate 4 so that the base plate 3 and the fixing plate 4 are locked and fixed by the second bolt 8.

[0059] In summary, the dispensing fixture for a stepper motor rotor provided by this utility model has a limiting groove 31 and a positioning hole 41 on the base plate 3 and the fixing plate 4, respectively. The limiting groove 31 and the positioning hole 41 cooperate to form a stepped groove 5. The magnetic ring 1 is placed in the positioning hole 41 and is axially positioned by the surface of the base plate 3. The rotating shaft 2 extends into the magnetic ring 1 and is axially positioned by the limiting groove 31. This dispensing fixture can effectively improve the consistency of the shaft extension length of the rotating shaft 2 extending into the magnetic ring 1. The dispensing fixture has a simple structure and high machining accuracy. The limiting groove 31 is a groove structure, which reduces machining difficulty and ensures consistent groove depth, effectively reducing the tolerance of the stepper motor rotor's shaft extension length and significantly improving the assembly accuracy and production efficiency of the stepper motor rotor.

[0060] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent modifications made based on the content of this utility model specification and drawings, or direct or indirect applications in related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A dispensing fixture for a stepper motor rotor, used to assist in the dispensing assembly of the magnetic ring and the shaft of the stepper motor rotor, characterized in that, It includes a base plate and a fixing plate. The fixing plate is disposed on the base plate. The base plate is provided with a limiting groove. The fixing plate is provided with a positioning hole corresponding to the limiting groove. The diameter of the positioning hole is larger than the width of the limiting groove, so that the positioning hole and the limiting groove cooperate to form a stepped groove.

2. The dispensing fixture according to claim 1, characterized in that, The limiting groove is a through groove, and the limiting groove connects to the opposite sides of the bottom plate.

3. The dispensing fixture according to claim 2, characterized in that, The fixing plate is provided with a plurality of positioning holes along the length of the through groove.

4. The dispensing fixture according to claim 2, characterized in that, The limiting groove includes a first through groove and a second through groove, the first through groove extending along the width direction of the base plate and the second through groove extending along the length direction of the base plate.

5. The dispensing fixture according to claim 2, characterized in that, The bottom of the limiting groove is a grinding surface.

6. The dispensing fixture according to claim 1, characterized in that, The shape of the positioning hole is adapted to the shape of the magnetic ring.

7. The dispensing fixture according to claim 1, characterized in that, It also includes a rubber pad and a first bolt. The rubber pad is located on the side of the base plate away from the fixing plate. The base plate has a screw hole, and the rubber pad has a mounting hole. The first bolt passes through the mounting hole and is threadedly connected to the screw hole.

8. The dispensing fixture according to claim 1, characterized in that, The fixing plate is detachably mounted on the base plate.

9. The dispensing fixture according to claim 8, characterized in that, It also includes a fastening assembly, one end of which is detachably connected to the base plate, and the other end of which presses against the fixing plate.

10. The dispensing fixture according to claim 9, characterized in that, The fastening assembly includes a second bolt, the base plate has a screw hole, the fixing plate has a through hole corresponding to the screw hole, and the second bolt passes through the through hole and is threadedly connected to the screw hole.

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