Rotor core and transmission shaft pressing shaft positioning tool

Abstract

The utility model relates to the field of motor manufacturing, in particular to a rotor core and transmission shaft pressing shaft positioning tool. The pressing shaft positioning tool comprises a pressing shaft upper seat, a heightening limiting block and a pressing shaft base which are sequentially arranged in a stacked mode from top to bottom. A first through hole penetrating from the top surface to the bottom surface of the pressing shaft upper seat is formed in the pressing shaft upper seat; the first through hole comprises an upper sub through hole and a lower sub through hole; a second through hole penetrating from the top surface to the bottom surface of the heightening limiting block is formed in the heightening limiting block; a first groove hole which is sunken downwards and does not penetrate to the bottom face of the pressing shaft base is formed in the top face of the pressing shaft base. The first groove hole comprises an upper sub-groove hole and a lower sub-groove hole. The shaft pressing positioning tool not only ensures that the rotor core and the transmission shaft are accurately positioned in the shaft pressing process, but also ensures that the pressure of the shaft pressing cannot cause extrusion bending of the transmission shaft, so that the product quality is improved; in addition, the shaft pressing positioning tool is simple in structure, convenient and fast to operate, capable of being suitable for being used as a shaft pressing positioning tool for products of various models and specifications, wide in adaptability and high in universality.

Description

Technical Field

[0001] The utility model relates to the field of motor manufacturing, in particular to a shaft pressing and positioning tool for a rotor core and a transmission shaft. Background Art

[0002] In the motor industry, during the assembly process of the rotor core and the transmission shaft (i.e., the pressing process), the transmission shaft needs to be precisely positioned and assembled into the inner hole of the rotor core. Among them, the traditional steps of the pressing process are: using the pressing equipment with simple tooling to press the transmission shaft into the inner hole of the rotor core.

[0003] In the finalizing process, for the positioning of the rotor core and the transmission shaft, currently on the market, a keyway is generally reserved in the transmission shaft, and the rotor core and the transmission shaft are positioned by using a positioning key and a positioning groove. However, the finalizing of the rotor core and the transmission shaft requires the use of a key or a shaft shoulder added to the transmission shaft. In the actual production process, a keyway processing process needs to be added to the transmission shaft, and a step of installing a positioning key needs to be added to the finalizing process, which increases the manufacturing cost of the keyway and the installation groove, and increases the production cost of the step of installing the positioning key.

[0004] However, if the above-mentioned solution of pressing the rotor core and the drive shaft with the help of a key or adding a shoulder to the drive shaft is not adopted, and only the traditional pressing tooling is used for the pressing process, the traditional pressing tooling does not have an auxiliary positioning and limiting mechanism, that is, there is no corresponding limiting and positioning structure on the tooling. Therefore, in the absence of a corresponding limiting and positioning structure, it is easy to cause inaccurate positioning when the pressing equipment applies force to the drive shaft to press it into the rotor core, and since there is no limiting design, it may be easy for the pressing equipment to apply excessive pressure, causing deformation of the drive shaft, affecting product quality. Utility Model Content

[0005] In order to solve the problems of the prior art mentioned in the background technology, the present application provides a rotor core and a transmission shaft pressing and positioning tool, and its technical solution is as follows:

[0006] The rotor core and the transmission shaft pressing and positioning tooling comprises a pressing upper seat, a height-limiting block, and a pressing base which are stacked in sequence from top to bottom; the pressing upper seat is provided with a first through hole which passes through its top surface to the bottom surface, and the first through hole comprises an upper sub-through hole and a lower sub-through hole which are sequentially arranged from top to bottom and interconnected; the height-limiting block is provided with a second through hole which passes through its top surface to the bottom surface; the top surface of the pressing base is provided with a first slot which is concave downward and does not pass through its bottom surface, and the first slot comprises a first slot which is sequentially arranged from top to bottom and interconnected The upper sub-slot holes and lower sub-slot holes are arranged and interconnected; wherein the upper sub-through hole matches the transmission shaft so that the transmission shaft can pass through it, and the lower sub-slot hole is fitted and matched with the lower section of the transmission shaft; the lower sub-through hole, the second through hole, and the upper sub-slot hole are connected to form a receiving groove that is fitted and matched with the rotor core, so that the transmission shaft can be passed through the first through hole, the second through hole, and the lower sub-slot hole in sequence from top to bottom, and the lower section of the transmission shaft can be installed in the lower sub-slot hole, and the rotor core can be installed in the receiving groove.

[0007] In some embodiments, the finale base includes a first sub-finale base and a second sub-finale base arranged in sequence from top to bottom; the top surface of the first sub-finale base is provided with the first slot hole which is recessed downward, and its bottom surface is provided with a positioning groove which passes through the first slot hole; the second sub-finale base includes a bottom plate and a positioning boss which is arranged on the top surface of the bottom plate, and the positioning boss is matched with the positioning groove, so that when the first sub-finale base and the second sub-finale base are assembled, the positioning boss is installed in the positioning groove, and the bottom surface of the first sub-finale base is in contact with the top surface of the bottom plate.

[0008] In some embodiments, the top surface of the positioning boss is provided with a truncated cone-shaped protrusion, and the top surface of the truncated cone-shaped protrusion is provided with a cylindrical boss; the bottom of the rotor core is provided with a cylindrical through hole, and the cylindrical boss is fitted and matched with the cylindrical through hole so that the cylindrical boss can be installed in the cylindrical through hole.

[0009] In some embodiments, an annular fixing block is extended outwardly from the outer circumference of the bottom plate, so that when the first sub-finale base and the second sub-finale base are assembled, the annular fixing block protrudes outward relative to the outer circumference of the first sub-finale base.

[0010] In some embodiments, the transmission shaft is a cylindrical structure, and the lower sub-slot hole is a cylindrical structure that fits and matches the lower section of the transmission shaft; the diameter of the transmission shaft is D1+0.005~D1+0.015, and the diameter of the lower sub-slot hole 312 is D1+0.015~D1+0.023.

[0011] In some embodiments, the positioning boss is a cylindrical structure, and the positioning groove is a cylindrical groove that fits and matches the positioning groove; the diameter of the positioning groove is D2~D2+0.013, and the diameter of the positioning boss 321 is D2-0.016~D2.

[0012] In some embodiments, the first sub-climax base and the second sub-climax base are detachably fixedly connected via a first fastener.

[0013] In some embodiments, an annular groove is provided on the periphery of the bottom surface of the height-limiting block; an annular protrusion is provided on the periphery of the top surface of the pressure-shaft base to fit in with the annular groove, so that the annular protrusion can be installed in the annular groove.

[0014] In some embodiments, the height of the lower through hole is 1.5-3 mm.

[0015] In some embodiments, the upper sub-through hole, the lower sub-through hole, the second through hole, the upper sub-slot hole, and the lower sub-slot hole are all cylindrical structures; and the diameters of the lower sub-through hole, the second through hole, and the upper sub-slot hole are equal; the annular groove is a circular ring structure, and the annular protrusion is a circular ring structure.

[0016] The utility model provides a rotor core and transmission shaft pressing and positioning tool, which has the following beneficial effects:

[0017] The pressing shaft positioning tool is used to assist in the pressing of the rotor core and the drive shaft, making the pressing shaft process of the rotor core and the drive shaft faster and more convenient. It not only ensures that the rotor core and the drive shaft are accurately positioned during the pressing shaft process, but also ensures that the pressing shaft pressure will not cause extrusion and bending of the drive shaft, thereby improving product quality. In addition, the pressing shaft positioning tool has a simple structure and is easy to operate. It can be used as a pressing shaft positioning tool for products of various models and specifications, and has wide adaptability and strong versatility. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0019] Figure 1 A schematic diagram of the three-dimensional structure of the shaft pressing and positioning tooling provided in one embodiment of the utility model after assembling the rotor core and the transmission shaft;

[0020] Figure 2 for Figure 1 Schematic diagram of partial structural decomposition;

[0021] Figure 3 A longitudinal cross-sectional view of a shaft pressing and positioning tool provided in one embodiment of the utility model;

[0022] Figure 4 A longitudinal cross-sectional view of a shaft pressing and positioning tool provided in an embodiment of the utility model after assembling a rotor core and a transmission shaft;

[0023] Figure 5 for Figure 4 Schematic diagram of partial structural decomposition;

[0024] Figure 6 for Figure 4 A local enlarged schematic diagram of the middle A;

[0025] Figure 7 for Figure 6 Schematic diagram of partial structural decomposition;

[0026] Figure 8 A schematic diagram of the structural disassembly of a pressure bearing base in a pressure bearing positioning tool provided in an embodiment of the utility model;

[0027] Fig. 9 A front view of a shaft pressing and positioning tool provided in an embodiment of the utility model before assembling a rotor core and a transmission shaft;

[0028] Fig.10 A front view of the shaft pressing and positioning tool provided in one embodiment of the utility model after the rotor core and the transmission shaft are assembled.

[0029] Reference numerals:

[0030] 10. Final bearing positioning tooling, 20. Transmission shaft, 30. Rotor core, 100. Final bearing upper seat, 200. Pad height limit block, 300. Final bearing base, 110. First through hole, 111. Upper sub-through hole, 112. Lower sub-through hole, 210. Second through hole, 220. Annular groove, 310. First sub-final bearing base, 320. Second sub-final bearing base, 311. Upper sub-slot hole, 312. Lower sub-slot hole, 313. Positioning groove, 314. Annular protrusion, 321. Positioning boss, 322. Cone-shaped protrusion, 323. Cylindrical boss, 324. Bottom plate, 325. Annular fixing block. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0033] The utility model provides Figure 1-10 The rotor core and the transmission shaft pressing and positioning tool 10 shown in the embodiment:

[0034] The pressing shaft positioning tool 10 comprises a pressing shaft upper seat 100, a cushioning limit block 200, and a pressing shaft base 300 which are stacked in sequence from top to bottom; the pressing shaft upper seat 100 is provided with a first through hole 110 which passes through from its top surface to the bottom surface, and the first through hole 110 comprises an upper sub-through hole 111 and a lower sub-through hole 112 which are arranged in sequence from top to bottom and are interconnected; the cushioning limit block 200 is provided with a second through hole 210 which passes through from its top surface to the bottom surface; the top surface of the pressing shaft base 300 is provided with a first slot which is concave downward and does not pass through to its bottom surface, and the first slot comprises an upper sub-slot hole 311 and a lower sub-slot hole 312 which are arranged in sequence from top to bottom and are interconnected; wherein, the upper sub-slot hole 111 It matches the transmission shaft 20 so that the transmission shaft 20 can pass through it, and the lower sub-slot hole 312 is fitted and matched with the lower section of the transmission shaft 20; the lower sub-through hole 112, the second through hole 210, and the upper sub-slot hole 311 are connected to form a receiving groove that is fitted and matched with the rotor core 30 (that is, the lower sub-through hole 112, the second through hole 210, and the upper sub-slot hole 311 are respectively fitted and matched with the top, middle and bottom of the rotor core 30), so that the transmission shaft 20 can be passed through the first through hole 110, the second through hole 210, and the lower sub-slot hole 312 from top to bottom, and the lower section of the transmission shaft 20 can be installed in the lower sub-slot hole 312, and the rotor core 30 can be installed in the receiving groove.

[0035] Specifically, in the finale process:

[0036] like Fig. 9As shown, the height limiting block 200 and the pressing shaft base 300 are first stacked and installed, and the transmission shaft 20 is inserted into the second through hole 210 and the lower sub-slot hole 312 from top to bottom for fixing. At this time, the lower section of the transmission shaft 20 is installed in the lower sub-slot hole 312, and the bottom surface of the lower sub-slot hole 312 limits its downward displacement. Since the lower section of the transmission shaft 20 is fitted and matched with the lower sub-slot hole 312, the lower sub-slot hole 312 limits its radial movement (horizontal movement), thereby fixing the transmission shaft 20 to play a role of positioning and limiting.

[0037] Then, the rotor core 30 is sleeved on the transmission shaft 20 and inserted into the second through hole 210 and the upper sub-slot hole 311. At this time, the top of the rotor core 30 emerges from the second through hole 210, and the rotor core 30 has not been pressed down into place, and there is still some gap between the rotor core 30 and the bottom surface of the lower sub-slot hole 312;

[0038] Insert the pressure shaft upper seat 100 into the transmission shaft 20 and place it above the height-limiting block 200. At this time, the upper section of the transmission shaft 20 is inserted into the upper sub-through hole 111. Since the size of the accommodating groove is designed to fit the entire rotor core 30, the lower sub-through hole 112 fits the top periphery of the rotor core 30. The lower sub-through hole 112 fits the top surface of the rotor core 30, and a gap is left between the pressure shaft upper seat 100 and the height-limiting block 200.

[0039] By applying downward pressure to the pressing shaft upper seat 100 (using the manual or automatic mode of the servo press to apply pressure to the pressing shaft upper seat 100), the pressing shaft upper seat 100 is slowly pressed into the transmission shaft 20 with the rotor core 30, and at this time, the top of the rotor core 30 is pressed down through the lower sub-through hole 112 to make the rotor core 30 move slowly downward; Fig.10 As shown, when the rotor core 30 is in place, the size of the accommodating groove is designed to fit the entire rotor core 30. At this time, the bottom surface of the lower sub-slot hole 312 is connected to the bottom of the rotor core 30 to limit it. At the same time, the pressing shaft upper seat 100 fits the pad limit block 200 exactly. At this time, the applied pressure will be given to the pad limit block 200 tooling, rather than to the rotor core 30, to protect the product from deformation. Among them, the press pressure will increase after it is in place. At this time, the servo press will automatically stop working after determining that the pressure is greater than the preset value. This preset pressure is set in advance in the servo press.

[0040] Based on the above, we can know that:

[0041] The upper through hole 111 of the pressing seat 100 of the embodiment of the present application is designed to match the transmission shaft 20, and the upper through hole 111 avoids the shaft diameter of the transmission shaft 20, which can ensure that the transmission shaft 20 will not be damaged during the pressing process; the lower through hole 112 of the pressing seat 100 is designed to fit and match the top of the rotor core 30, and its main function is to cover the top outer ring of the rotor core 30, and ensure that the rotor core 30 can be centered and pressed smoothly before pressing, which can position the rotor core 30 and ensure the positioning and matching accuracy of the rotor core 30 and the transmission shaft 20;

[0042] A height limiting block 200 is independently designed in the middle part, and the second through hole 210 inside the same is designed to fit in with the middle part of the rotor core 30, and can fit over the outer ring of the bottom of the rotor core 30, ensuring that the rotor core 30 can be centered and pressed smoothly before and after the shaft is pressed; in addition, the specification and size of the height limiting block 200 can be adjusted according to the stacking thickness of the different rotor cores 30, ensuring that the size design of the accommodating groove just fits the entire rotor core 30, so that when the height limiting block 200 is placed in the shaft pressing base 300, the final position of the rotor core 30 will be higher than the height limiting block 200 by a distance, and this distance is equal to the depth of the lower sub-through hole 112 of the shaft pressing upper seat 100, so that when the shaft is pressed into place, the pressure will be transmitted to the height limiting block 200 tooling instead of the rotor core 30, which plays a role in protecting the product from deformation. It can be seen that the use of the height limiting block 200 design can improve the applicability and versatility of the tooling;

[0043] An upper sub-slot 311 and a lower sub-slot 312 are designed on the pressing base 300; the upper sub-slot 311 is designed to fit in with the bottom of the rotor core 30, and its main function is to fit over the bottom outer ring of the rotor core 30. In addition, the lower sub-slot 312 is fit in with the lower section of the drive shaft 20, and plays a role in limiting and positioning the drive shaft 20. The above design can ensure that the rotor core 30 can be centered and pressed smoothly before and after pressing, and it can position the rotor core 30, thereby improving the positioning and matching accuracy of the rotor core 30 and the drive shaft 20.

[0044] In summary, through the coordinated design of the pressing upper seat 100, the height limit block 200 and the pressing base 300 of the tooling, the pressing positioning tooling 10 provided in the embodiment of the present application is used to assist the pressing of the rotor core 30 and the drive shaft 20, which can make the pressing process of the rotor core 30 and the drive shaft 20 faster and more convenient. It not only ensures the accurate positioning of the rotor core 30 and the drive shaft 20 during the pressing process, but also ensures that the pressing pressure will not cause the drive shaft 20 to be squeezed and bent, thereby improving the product quality. In addition, the pressing positioning tooling 10 has a simple structure and is convenient to operate. It can be used as a pressing positioning tooling 10 for products of various models and specifications, and has wide adaptability and strong versatility.

[0045] Optionally, the height of the lower sub-through hole 112 is 1.5-3 mm.

[0046] The lower sub-through hole 112 is fitted and matched with the top of the rotor core 30, that is, the height of the lower sub-through hole 112 is equal to the height of the portion of the rotor core 30 protruding from the top of the second through hole 210. The height of the lower sub-through hole 112 can be optionally designed to be 1.5 to 3 mm.

[0047] Optionally, the finale base 300 includes a first sub-finale base 310 and a second sub-finale base 320 arranged in sequence from top to bottom; the top surface of the first sub-finale base 310 is provided with the first slot hole which is recessed downward, and its bottom surface is provided with a positioning groove 313 which passes through the first slot hole; the second sub-finale base 320 includes a bottom plate 324 and a positioning boss 321 which is arranged on the top surface of the bottom plate 324, and the positioning boss 321 is matched with the positioning groove 313, so that when the first sub-finale base 310 and the second sub-finale base 320 are assembled, the positioning boss 321 is installed in the positioning groove 313, and the bottom surface of the first sub-finale base 310 is in contact with the top surface of the bottom plate 324.

[0048] The pressure bearing base 300 adopts a design of combining a first sub-pressure bearing base 310 and a second sub-pressure bearing base 320. Compared with the integrated pressure bearing base 300, on the one hand, it is convenient for component processing and saves costs; on the other hand, the first sub-pressure bearing base 310 can be replaced according to different product models, and the shaft diameters of the upper sub-slot hole 311 and the lower sub-slot hole 312 can be changed to match the transmission shaft 20 and the rotor core 30 of different specifications. The height of the first sub-pressure bearing base 310 is adaptively adjusted according to the matching position of the rotor core 30 and the transmission shaft 20. It can be seen that such a design can meet the pressure bearing requirements of products of different specifications by replacing the first sub-pressure bearing base 310 and the second sub-pressure bearing base 320.

[0049] In addition, the positioning boss 321 is designed to fit in with the positioning groove 313 to facilitate the positioning and installation between the first sub-final base 310 and the second sub-final base 320 .

[0050] Optionally, a truncated cone-shaped protrusion 322 is provided on the top surface of the positioning boss 321, and a cylindrical boss 323 is provided on the top surface of the truncated cone-shaped protrusion 322; a cylindrical through hole is provided on the bottom of the rotor core 30, and the cylindrical boss 323 is fitted and matched with the cylindrical through hole so that the cylindrical boss 323 can be installed in the cylindrical through hole.

[0051] Among them, the cylindrical boss 323 is designed to be embedded in the cylindrical through hole. On the one hand, it can fix the transmission shaft 20 and improve the positioning accuracy of the transmission shaft 20 on the pressure shaft base 300. In addition, the coordinated design of the truncated cone protrusion 322 and the cylindrical boss 323 can make the bottom of the transmission shaft 20 flat and firmly installed.

[0052] In addition, if Figure 4 and Figure 6 As shown, through the design of the truncated cone-shaped protrusion 322 , a gap is provided at the contact portion between the truncated cone-shaped protrusion 322 and the inner wall surface of the positioning groove 313 , and the gap design can avoid interference between the first sub-finale base 310 and the second sub-finale base 320 .

[0053] Optionally, an annular groove 220 is provided on the outer periphery of the bottom surface of the pad height limiting block 200; an annular protrusion 314 is provided on the outer periphery of the top surface of the pressing base 300 to fit in the annular groove 220, so that the annular protrusion 314 can be installed in the annular groove 220. Optionally, the annular groove 220 is a circular ring structure, and the annular protrusion 314 is a circular ring structure; further optionally, the annular groove 220, the annular protrusion 314, the upper sub-slot hole 311, and the lower sub-slot hole 312 are coaxially designed.

[0054] The annular groove 220 and the annular protrusion 314 are used in combination to improve the accuracy and stability of the positioning and installation of the height limit block 200 and the pressure shaft base 300; in addition, the annular groove 220 and the annular protrusion 314 are coaxially designed with the upper sub-slot hole 311 and the lower sub-slot hole 312. By controlling the coaxiality of the inner ring and the outer ring, the height limit block 200 and the pressure shaft base 300 are coaxially positioned and matched, thereby improving the positioning accuracy and stability of both the rotor core 30 and the transmission shaft 20.

[0055] Optionally, the transmission shaft 20 is a cylindrical structure, and the lower sub-slot hole 312 is a cylindrical structure that fits and matches the lower section of the transmission shaft 20; the diameter of the transmission shaft 20 is D1+0.005~D1+0.015, and the diameter of the lower sub-slot hole 312312 is D1+0.015~D1+0.023.

[0056] With the above design, the inner diameter of the lower sub-slot hole 312 is adjusted according to the transmission shaft 20 so that it can fit closely with the transmission shaft 20 to ensure that the transmission shaft 20 is stable and not easy to loosen.

[0057] Optionally, the positioning boss 321 is a cylindrical structure, and the positioning groove 313 is a cylindrical groove that fits and matches the positioning groove 313; the diameter of the positioning groove 313 is D2~D2+0.013, and the diameter of the positioning boss 321 is D2-0.016~D2.

[0058] With the above design, the positioning boss 321 and the positioning groove 313 are tightly matched.

[0059] Optionally, the first sub-finale base 310 and the second sub-finale base 320 are detachably fixedly connected via a first fastener.

[0060] like Figure 8 As shown, the first sub-press base 310 and the second sub-press base 320 are locked together by screw holes. According to the above design concept, the tooling can also be connected by other fasteners, including but not limited to the embodiment scheme; wherein, in this embodiment, three screw fasteners arranged at equal angles along the outer periphery of the positioning boss 321 are designed on the press base 300. According to the above design concept, the arrangement and quantity of the fasteners can also adopt other schemes other than the embodiment.

[0061] Optionally, an annular fixing block 325 is extended outward from the outer circumference of the bottom plate 324 so that when the first sub-finale base 310 and the second sub-finale base 320 are assembled, the annular fixing block 325 protrudes outward relative to the outer circumference of the first sub-finale base 310.

[0062] Before pressing, the pressing base 300 needs to be placed on the platform of the servo press and locked. The second sub-pressing base 320 is designed to have a larger outer diameter than the first sub-pressing base 310, so that an annular fixing block 325 is extended outward to facilitate the pressing block of the servo press to fix the pressing base 300. The specific process is: the pressing block of the servo press is fixed to the top of the annular fixing block 325 of the second sub-pressing base 320, and the other end is bolted to lock the pressing block to the guide rail of the servo press. Ensure that the tooling is fixed to the servo press platform without sliding or offset.

[0063] Optionally, an annular waist groove is provided on the central periphery of the pressing shaft upper seat 100 to facilitate the pressing shaft equipment (such as a press) to clamp and apply force to the pressing shaft upper seat 100.

[0064] Optionally, the upper sub-through hole 111, the lower sub-through hole 112, the second through hole 210, the upper sub-slot hole 311, and the lower sub-slot hole 312 are all cylindrical structures; and the diameters of the lower sub-through hole 112, the second through hole 210, and the upper sub-slot hole 311 are equal. Optionally, the axes of the upper sub-through hole 111, the lower sub-through hole 112, the second through hole 210, the upper sub-slot hole 311, and the lower sub-slot hole 312 are coaxial.

[0065] It should be noted that: in this embodiment, the rotor core 30 and the transmission shaft 20 are mostly cylindrical or annular structures; therefore, the structural shapes of the various components of the tooling of this embodiment are designed to be compatible with them. According to the above design concept, the shape and size of the pressing shaft positioning tooling 10 provided in this application can be adaptively adjusted according to the shape and size of the rotor core 30 and the transmission shaft 20 of the motor. In addition, compared with other polygonal column structures, the above components are set to be cylindrical and compatible with each other. They can be directly inserted without adjusting to the corresponding angle when they are snap-fitted, which is convenient for use.

[0066] Although the terminology such as rotor core, transmission shaft, etc. is used more frequently in this article, the possibility of using other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the utility model; interpreting them as any additional restrictions is contrary to the spirit of the utility model.

[0067] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A rotor core and transmission shaft pressing and positioning tool, characterized in that: It comprises a pressing shaft upper seat (100), a height limiting block (200), and a pressing shaft base (300) which are sequentially stacked from top to bottom; The pressure shaft upper seat (100) is provided with a first through hole (110) extending from its top surface to its bottom surface, and the first through hole (110) comprises an upper sub-through hole (111) and a lower sub-through hole (112) which are arranged in sequence from top to bottom and are interconnected; The height-limiting block (200) is provided with a second through hole (210) extending from its top surface to its bottom surface; The top surface of the pressing shaft base (300) is provided with a first slot hole which is recessed downward and does not penetrate to the bottom surface thereof, and the first slot hole comprises an upper sub-slot hole (311) and a lower sub-slot hole (312) which are sequentially arranged from top to bottom and are interconnected; The upper through hole (111) matches the transmission shaft (20) so that the transmission shaft (20) can pass through it, and the lower slot hole (312) is matched with the lower section of the transmission shaft (20); the lower through hole (112), the second through hole (210), and the upper slot hole (311) are connected to form a receiving groove matched with the rotor core (30), so that the transmission shaft (20) can be passed through the first through hole (110), the second through hole (210), and the lower slot hole (312) from top to bottom, and the lower section of the transmission shaft (20) can be installed in the lower slot hole (312), and the rotor core (30) can be installed in the receiving groove.

2. The rotor core and transmission shaft pressing and positioning tool according to claim 1 is characterized in that: The finale base (300) comprises a first sub-finale base (310) and a second sub-finale base (320) which are arranged in sequence from top to bottom; The top surface of the first sub-pressing base (310) is provided with the first slot hole which is recessed downwards, and the bottom surface thereof is provided with a positioning groove (313) which passes through the first slot hole; The second sub-finale base (320) includes a bottom plate (324) and a positioning boss (321) arranged on the top surface of the bottom plate (324), wherein the positioning boss (321) is fitted and matched with the positioning groove (313), so that when the first sub-finale base (310) and the second sub-finale base (320) are assembled, the positioning boss (321) is installed in the positioning groove (313), and the bottom surface of the first sub-finale base (310) is in contact with the top surface of the bottom plate (324).

3. The rotor core and transmission shaft pressing and positioning tool according to claim 2, characterized in that: The top surface of the positioning boss (321) is provided with a truncated cone-shaped protrusion (322), and the top surface of the truncated cone-shaped protrusion (322) is provided with a cylindrical boss (323); A cylindrical through hole is provided at the bottom of the rotor core (30), and the cylindrical boss (323) is fitted and matched with the cylindrical through hole so that the cylindrical boss (323) can be installed in the cylindrical through hole.

4. The rotor core and transmission shaft pressing and positioning tool according to claim 2, characterized in that: An annular fixing block (325) is provided extending outwardly from the outer periphery of the bottom plate (324), so that when the first sub-finale base (310) and the second sub-finale base (320) are assembled, the annular fixing block (325) protrudes outwardly relative to the outer periphery of the first sub-finale base (310).

5. The rotor core and transmission shaft pressing and positioning tool according to claim 2 is characterized in that : The transmission shaft (20) is a cylindrical structure, and the lower sub-slot hole (312) is a cylindrical structure that fits and matches with the lower section of the transmission shaft (20); The diameter of the transmission shaft (20) is D1+0.005 to D1+0.015, and the diameter of the lower sub-slot hole (312) is D1+0.015 to D1+0.

023.

6. The rotor core and transmission shaft pressing and positioning tool according to claim 3 is characterized in that : The positioning boss (321) is a cylindrical structure, and the positioning groove (313) is a cylindrical groove that fits and matches the positioning groove (313); The diameter of the positioning groove (313) is D2 to D2+0.013, and the diameter of the positioning boss (321) is D2-0.016 to D2.

7. The rotor core and transmission shaft pressing and positioning tool according to claim 2, characterized in that: The first sub-final base (310) and the second sub-final base (320) are detachably fixedly connected via a first fastener.

8. The rotor core and transmission shaft pressing and positioning tool according to claim 1, characterized in that: An annular groove (220) is provided on the outer periphery of the bottom surface of the height-raising limit block (200); An annular protrusion (314) which fits and matches the annular groove (220) is provided on the outer periphery of the top surface of the pressing shaft base (300), so that the annular protrusion (314) can be installed in the annular groove (220).

9. The rotor core and transmission shaft pressing and positioning tool according to claim 1, characterized in that: The height of the lower through hole (112) is (1.5-3) mm.

10. The rotor core and transmission shaft pressing and positioning tool according to claim 8, characterized in that: The upper sub-through hole (111), the lower sub-through hole (112), the second through hole (210), the upper sub-slot hole (311), and the lower sub-slot hole (312) are all cylindrical structures; and the diameters of the lower sub-through hole (112), the second through hole (210), and the upper sub-slot hole (311) are equal; The annular groove (220) is a circular ring structure, and the annular protrusion (314) is a circular ring structure.

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