Servo motor straight-pole and oblique-pole dual-purpose rotor iron core press-fitting tool and press-fitting method thereof

Abstract

The invention discloses a servo motor straight pole and oblique pole dual-purpose rotor iron core press fitting tool and a press fitting method thereof.The servo motor straight pole and oblique pole dual-purpose rotor iron core press fitting tool comprises a base assembly, a rotor iron core positioning assembly and a pressing assembly, a supporting hole is formed in the base assembly, the rotor iron core positioning assembly comprises two positioning units, and the two positioning units are arranged on a rotor shaft in a sleeving mode in the using state; the two positioning units rotate in the axial direction to adjust the angle so as to be used for conversion between straight pole press fitting and oblique pole press fitting of the two rotor cores, and the pressing assembly can be arranged on the rotor shaft in a sleeving mode from the top end of the rotor shaft in the using state and can move up and down relative to the rotor shaft. The axial positioning device is used for axially positioning the rotor iron core and pressing the rotor iron core downwards so as to press the rotor iron core in place. According to the invention, only one set of tool is used, two rotor iron core straight poles or skewed poles of the servo motor can be pressed on the rotor shaft, the universality of the tool is improved, the cost is lower, and the pressing efficiency of the rotor iron core is effectively improved.

Description

TECHNICAL FIELD

[0001] The application relates to a servo motor straight pole and inclined pole dual-purpose rotor core pressing device and a pressing method thereof, and belongs to the field of servo motor rotor manufacturing. BACKGROUND

[0002] The servo motor rotor is composed of a rotor shaft and a rotor core, wherein the rotor core is assembled on the rotor shaft in a straight pole mode and an inclined pole mode, the straight pole rotor is simple in structure and low in manufacturing cost, the inclined pole rotor can reduce tooth slot torque, inhibit torque ripple and reduce electromagnetic noise level, but the manufacturing process is relatively complex.

[0003] The manufacturing of the straight pole rotor and the inclined pole rotor is completed on a rotor core pressing device, the rotor shaft is first fixed, and then the rotor core is pressed on the rotor shaft, the existing rotor core pressing device for the straight pole rotor and the rotor core pressing device for the inclined pole rotor are two sets of different structure devices, therefore the rotor core pressing device for the straight pole rotor can only press the straight pole rotor, and the rotor core pressing device for the inclined pole rotor is only suitable for pressing the inclined pole rotor, so that the existing rotor core pressing device has poor universality. SUMMARY

[0004] One of the purposes of the application is to provide a servo motor straight pole and inclined pole dual-purpose rotor core pressing device, which solves the technical defect that two different devices are needed to press the rotor core of the servo motor in the prior art.

[0005] To solve the above problems, the technical scheme adopted by the present application is: a servo motor straight pole and inclined pole dual-purpose rotor core press-fitting tool, comprising a base assembly, a rotor core positioning assembly and a pressing assembly, the base assembly is provided with a support hole for fixing the rotor shaft in the use state, the rotor core positioning assembly comprises two positioning units, the two positioning units are sleeved on the rotor shaft in the use state, and are used for positioning the upper and lower rotor cores sleeved on the rotor shaft, the two positioning units are adjusted in the axial direction to change the straight pole and inclined pole press-fitting of the two rotor cores, and the pressing assembly can be sleeved on the rotor shaft from the top end of the rotor shaft in the use state and can move up and down relative to the rotor shaft, and is used for axially positioning the rotor core and pressing the rotor core downward to press-fit the rotor core in place. The present application is provided with two angle-adjustable positioning units, when the rotor core is press-fitted, the two positioning units are adjusted at a non-zero angle, which is suitable for inclined pole press-fitting of the two rotor cores, and the two positioning units are adjusted at an angle of 0°, and the two rotor cores are straight pole press-fitted, so that the present application can realize straight pole or inclined pole press-fitting of the two rotor cores of the servo motor on the rotor shaft with only one set of tool, improve the universality of the present application, and press-fit straight pole rotors and inclined pole rotors with one set of press-fitting equipment, so that the present application has lower cost compared with the need to separately provide two sets of press-fitting equipment to complete the press-fitting of the straight pole rotors and the inclined pole rotors, the present application is provided with a pressing assembly, which is convenient for press-fitting the rotor core on the rotor shaft in place downward in use, and can effectively improve the press-fitting efficiency of the rotor core.

[0006] As a further improvement of the present application, the positioning unit comprises a positioning body, the positioning body is provided with a positioning through hole penetrating through the upper and lower sides thereof, the positioning body is sleeved on the rotor shaft in the use state, and the rotor core is sleeved on the rotor shaft from the top end of the rotor shaft and positioned by the positioning body. The present application is provided with a positioning through hole on the positioning body, which cooperates with the rotor core to position the rotor core, so as to prevent the press-fitting accuracy of the rotor core from being affected by the rotation of the rotor core and the rotor shaft during the press-fitting of the rotor core.

[0007] As a further improvement of the present application, the inner wall of the positioning through hole is provided with a positioning groove, the number of the positioning grooves is two or more, and the positioning grooves are uniformly distributed along the circumferential direction of the positioning through hole, the positioning groove cooperates with the long strip-shaped protrusion on the outer surface of the rotor core in the use state, and is used for circumferentially positioning the rotor core. The present application is provided with a positioning groove in the positioning through hole, which cooperates with the protrusion on the rotor core, so that the rotor core does not rotate under the premise that the positioning unit does not rotate, thereby ensuring the press-fitting accuracy of the rotor core.

[0008] As a further improvement of the present application, the positioning through hole on the positioning unit comprises a first through hole unit and a second through hole unit, wherein the diameter of the first through hole unit is larger than that of the second through hole unit, the positioning groove is opened on the inner wall of the second through hole unit, the depth of the second through hole unit is smaller than the height of the rotor core, and the first through hole units of the two positioning units are oppositely arranged in the use state. In the present application, the positioning through hole is composed of two parts with different diameters, which can ensure that the rotor core only contacts with one positioning unit in use, thereby avoiding the influence on the pressing of the upper rotor core due to the contact between the rotor core and two positioning units during the inclined pole pressing of the rotor core.

[0009] As a further improvement of the present application, the pressing assembly comprises a pressing sleeve, which is sleeved on the rotor shaft from the top end of the rotor shaft in the use state, and the bottom end of the pressing sleeve extends into the positioning unit and contacts with the top of the rotor core in the positioning unit. The pressing sleeve is pressed downward to press the rotor core downward so as to press the rotor core into position on the rotor shaft. In the present application, the pressing sleeve is sleeved on the rotor shaft, and the rotor core is pressed downward from the top of the rotor core to the set position on the rotor shaft, thereby facilitating the pressing of the rotor core.

[0010] As a further improvement of the present application, the pressing assembly further comprises a guide sleeve, which is arranged in the pressing sleeve and can move up and down in the pressing sleeve. In the use state, the bottom end of the guide sleeve is sleeved on the top end of the rotor shaft to guide the up and down movement of the pressing sleeve on the rotor shaft. In the present application, the guide sleeve is arranged to cooperate with the upper part of the rotor shaft. In use, the guide sleeve is limited and fixed downward by the upper part of the rotor shaft. The guide sleeve reduces the radial gap between the pressing sleeve and the rotor shaft, guides the pressing sleeve, prevents the pressing sleeve from forming an angle with the vertical direction when the radial force is too large, and thus makes the stress on the rotor core more uniform, and further improves the pressing accuracy of the rotor core.

[0011] As a further improvement of the present application, the inner diameter of the upper part of the pressing sleeve is larger than that of the lower part, a first shoulder is formed at the position where the inner diameters of the upper part and the lower part change on the inner wall of the pressing sleeve, the outer diameter of the upper part of the guide sleeve is larger than that of the lower part, a second shoulder is formed at the position where the outer diameters of the upper part and the lower part change on the outer wall of the guide sleeve, the outer diameter of the lower part of the guide sleeve is smaller than the inner diameter of the lower part of the pressing sleeve, and the outer diameter of the upper part of the guide sleeve is between the inner diameters of the upper part and the lower part of the pressing sleeve. When the pressing sleeve is lifted upward, the second shoulder is in contact with the first shoulder to prevent the guide sleeve from slipping out of the pressing sleeve. In the present application, the pressing sleeve cooperates with the guide sleeve. When the pressing assembly is lifted upward, the guide sleeve will not fall out of the pressing sleeve. Therefore, the pressing assembly does not need to be assembled every time, which is more convenient for the pressing of the rotor core in the present application, and further improves the pressing efficiency of the rotor core in the present application.

[0012] As a further improvement of the present application, four first limiting through holes are formed on the positioning body, the center lines of the four first limiting through holes are located on two intersecting planes A, the center lines of the positioning through holes are the intersection lines of the two planes A, two second limiting through holes are formed on the base assembly, the center lines of the two second limiting through holes and the center line of the supporting hole are located on the same plane B, in the use state, the two first limiting through holes located on the same plane A correspond to the two second limiting through holes respectively, and the positioning body is positioned on the base assembly by the limiting rods inserted into the first limiting through holes and the second limiting through holes. The first limiting through holes on the positioning body and the second limiting through holes on the base assembly are inserted with the limiting rods, so that the positioning body and the base assembly are positioned, and rotation of the positioning body relative to the base assembly is prevented. The first limiting through holes on the two positioning bodies correspond to each other, the angle of the two positioning bodies is adjusted, and the straight poles or inclined poles of the rotor cores are pressed and assembled on the rotor shaft.

[0013] Another object of the present application is to provide a pressing assembly method of a rotor core, which facilitates and has high precision in pressing and assembling the straight poles or inclined poles of the rotor core on the rotor shaft.

[0014] To solve the above problems, the technical scheme adopted by the present application is as follows: a pressing assembly method of a rotor core, comprising the following steps: Step 1, inserting the bottom of the rotor shaft into the supporting hole of the base assembly to make the rotor shaft in a vertical state.

[0015] Step 2, placing one of the rotor cores on the rotor shaft, pressing the rotor core downward by the pressing assembly until the bottom end of the rotor core is attached to the base assembly, and then disassembling the pressing assembly from the rotor shaft; Step 3, placing one of the positioning units on the rotor core in step 2, with the first through hole unit of the positioning unit located above and the long protrusion on the rotor core corresponding to the positioning groove, rotating the positioning unit to make the two second limiting through holes on the base assembly correspond to the two first limiting through holes on the positioning unit respectively, and inserting the limiting rods into the first limiting through holes and the second limiting through holes.

[0016] Step 4, placing the other positioning unit on the rotor shaft from the top end of the rotor shaft to attach to the positioning unit on the base assembly, and according to the pressing and assembling requirements of the straight poles or inclined poles of the two rotor cores, making the two limiting rods pass through the corresponding two first limiting through holes on the positioning unit respectively, and the first through hole unit on the positioning unit is set downward.

[0017] Step 5, another rotor core is sleeved on the rotor shaft from the top end of the rotor shaft, and the long protrusions on the rotor core correspond to the positioning grooves on the positioning unit, and the rotor core is pressed downward by the pressing assembly until the bottom end of the rotor core is attached to the top end of the rotor core below.

[0018] Step 6, the pressing assembly, the limiting rod and the positioning unit are removed in sequence, and the pressed rotor core is removed from the base assembly.

[0019] As a further improvement of the application, the assembly method of the pressing assembly is to insert the smaller end of the guide sleeve into the larger end of the pressing sleeve from the inside diameter of the pressing sleeve.

[0020] In summary, the application has the following advantages: a set of tooling can be used to press the rotor core of the servo motor on the rotor shaft, the use is good, and the application is convenient and precise in pressing the rotor core, and the overall structure is simple. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a top view of the rotor core in the application.

[0022] Figure 2 is a top view of the base assembly in the application.

[0023] Figure 3 is the A-A sectional view of Figure 2 .

[0024] Figure 4 is a top view of the positioning unit in the application.

[0025] Figure 5 is the B-B sectional view of Figure 4 .

[0026] Figure 6 is a longitudinal sectional view of the pressing sleeve in the application.

[0027] Figure 7 is a longitudinal sectional view of the guide sleeve in the application.

[0028] Figure 8 is a schematic view of the application in use.

[0029] Figure 9 is a top view of the two positioning units when the rotor core is straightly pressed in the application.

[0030] Figure 10 is a top view of the two positioning units when the rotor core is obliquely pressed in the application.

[0031] Wherein: 1, base assembly; 2, rotor shaft; 3, support hole; 4, rotor core positioning assembly; 5, positioning unit; 6, rotor core; 7, pressing assembly; 8, positioning body; 9, positioning through hole; 10, positioning groove; 11, protrusion; 12, first through hole unit; 13, second through hole unit; 14, pressing sleeve; 15, guide sleeve; 16, first shoulder; 17, second shoulder; 18, first limiting through hole; 19, plane A; 20, second limiting through hole; 21, limiting rod; 22, base support; 23, upper support hole unit; 24, lower support hole unit; 25, positioning protrusion; 26, first pressing unit; 27, second pressing unit; 28, third pressing unit; 29, first guide unit; 30, second guide unit; 31, plane B; 32, base body. DETAILED DESCRIPTION

[0032] The specific embodiments of the present application will be further described below with reference to the accompanying drawings. Example 1

[0033] This embodiment is a servo motor straight pole and inclined pole dual-purpose rotor core pressing tool, which comprises a base assembly 1, a rotor core positioning assembly 4 and a pressing assembly 7.

[0034] As shown in Figure 2 and Figure 3 , the base assembly 1 is placed on the workbench in the use state, the base assembly 1 comprises a base body 32 and a base support 22, both of which are cylindrical in shape, wherein the height of the base body 32 is greater than the height of the base support 22, the outer diameter of the base body 32 is smaller than the outer diameter of the base support 22, the base body 32 and the base support 22 are coaxially arranged and integrally formed, and a support hole 3 for fixing the rotor shaft 2 in the use state is formed on the base assembly 1, the support hole 3 penetrates through the upper and lower ends of the base assembly 1 formed by the base body 32 and the base support 22, the support hole 3 comprises an upper support hole unit 23 and a lower support hole unit 24, both of which are formed along the center line of the base body 32, the hole diameter of the upper support hole unit 23 is greater than that of the lower support hole unit 24, the support hole 3 cooperates with the lower part of the rotor shaft 2 in the use state, the bottom end of the rotor shaft 2 is inserted into the support hole 3, the rotor shaft 2 is supported by the base assembly 1, and the rotor shaft 2 is fixed in a vertical state.

[0035] As shown in Figure 8As shown, the rotor core positioning assembly 4 includes two positioning units 5, which are stacked one above the other in the use state, the lower surface of the upper positioning unit 5 is in close contact with the upper surface of the lower positioning unit 5, the two positioning units 5 are sleeved on the rotor shaft 2 in the use state, and the rotor core 6 can move downward along the rotor shaft in the positioning unit 5, the positioning unit 5 is used for positioning the rotor core 6 sleeved on the rotor shaft 2, and the two positioning units 5 are adjusted in angle along the axial direction, so that the upper and lower rotor cores 6 can be staggered in angle, and the straight poles and the inclined poles of the two rotor cores 6 are determined for pressing.

[0036] The pressing assembly 7 can be sleeved on the rotor shaft 2 from the top end of the rotor shaft 2 and can move up and down relative to the rotor shaft 2 in the use state, the bottom of the pressing assembly 7 is in contact with the top surface of the rotor core 6, and when the pressing assembly 7 moves downward relative to the rotor shaft 2, the rotor core 6 is pressed downward, so that the rotor core 6 moves downward on the rotor shaft 2 until the rotor core 6 is pressed into place.

[0037] As shown in Figure 4 and Figure 5 The positioning unit 5 includes a positioning body 8, which is in the shape of a cylinder as a whole, a positioning through hole 9 is formed in the positioning body 8 along the center line thereof and penetrates the upper and lower sides thereof, the positioning body 8 is sleeved on the rotor shaft 2 through the positioning through hole 9 in the use state, the rotor core 6 is sleeved on the rotor shaft 2 from the top end of the rotor shaft 2 and is positioned by the positioning body 8 in the positioning through hole 9, so as to ensure the pressing of the straight poles or the inclined poles of the upper and lower rotor cores 6.

[0038] As shown in Figure 4 and Figure 5 The positioning groove 10 is provided on the inner wall of the positioning through hole 9, the number of the positioning grooves 10 is two or more, and the positioning grooves 10 are uniformly distributed along the circumferential direction of the positioning through hole 9, and the embodiment preferably provides two positioning grooves 10 on the inner wall of the positioning through hole 9, the embodiment provides two positioning protrusions 25 on the inner wall of the positioning through hole 9 towards the center line direction of the positioning through hole 9, the two positioning protrusions 25 are oppositely arranged, the two positioning grooves 10 are formed on the two positioning protrusions 25, and the width of the positioning groove 10 is slightly greater than the width of the long strip-shaped protrusion 11 on the outer surface of the rotor core 6, wherein the structure of the rotor core 6 is shown in Figure 1 The positioning groove 10 cooperates with the long strip-shaped protrusion 11 on the outer surface of the rotor core 6 in the use state, the protrusion 11 on the rotor core 6 extends into the positioning groove 10, the rotor core 6 is circumferentially positioned by the positioning groove 10, and the pressing precision of the rotor core 6 is avoided from being affected by the staggered angle between the upper and lower rotor cores 6 due to the rotation of the rotor core 6 relative to the rotor shaft 2.

[0039] As shown in Figure 4 and Figure 5As shown, the positioning hole 9 on the positioning unit 5 in the embodiment includes a first hole unit 12 and a second hole unit 13, wherein the diameter of the first hole unit 12 is larger than the diameter of the second hole unit 13, the positioning protrusion 25 is located on the inner wall of the second hole unit 13, and thus the positioning groove 10 is located in the second hole unit 13. In the embodiment, the depth of the second hole unit 13 is smaller than the height of the rotor core 6. In the use state, the first hole units 12 of the two positioning units 5 are oppositely arranged. Thus, when the rotor core 6 is pressed, the rotor core 6 only contacts one positioning unit 5, avoiding the interference of the pressing of the rotor core 6 caused by the contact of the rotor core 6 with two positioning units 5 at the same time.

[0040] As shown, Figure 8 As shown, the pressing assembly 7 in the embodiment includes a pressing sleeve 14 and a guide sleeve 15. The pressing sleeve 14 is sleeved on the rotor shaft 2 from the top end of the rotor shaft 2 in the use state. The bottom end of the pressing sleeve 14 can extend into the positioning unit 5 and contact the top of the rotor core 6 located in the positioning unit 5. By pressing the pressing sleeve 14 downward, the rotor core 6 is pressed downward by the pressing sleeve 14 to be pressed and fitted on the rotor shaft 2. The guide sleeve 15 is arranged in the pressing sleeve 14 and can move up and down in the pressing sleeve 14. In the use state, the bottom end of the guide sleeve 15 is sleeved on the top end of the rotor shaft 2 to guide the up and down movement of the pressing sleeve 14 on the rotor shaft 2 and radially position the pressing sleeve 14 to prevent the pressing sleeve 14 from colliding with the shaft shoulder of the rotor shaft 2 when the rotor core 6 is pressed downward.

[0041] As shown, Figure 6 As shown, the pressing sleeve 14 includes a first pressing unit 26, a second pressing unit 27, and a third pressing unit 28 in the upper part, the middle part, and the lower part. The first pressing unit 26, the second pressing unit 27, and the third pressing unit 28 are all cylindrical and coaxially arranged and integrally formed. The outer diameters of the first pressing unit 26, the second pressing unit 27, and the third pressing unit 28 decrease in turn. The inner diameters of the upper parts of the first pressing unit 26, the second pressing unit 27, and the third pressing unit 28 are equal and larger than the inner diameter of the lower part of the third pressing unit 28. The first shoulder 16 is formed at the inner diameter change position of the upper and lower parts of the inner wall of the third pressing unit 28 of the pressing sleeve 14. The first shoulder 16 is a horizontal annular surface.

[0042] As shown, Figure 7As shown, the guide sleeve 15 includes a first guide unit 29 at the upper portion and a second guide unit 30 at the lower portion, which are coaxially arranged and integrally formed, the diameter of the first guide unit 29 is larger than the outer diameter of the second guide unit 30, a second shoulder 17 is formed at the joint of the first guide unit 29 and the second guide unit 30, the second shoulder 17 is a horizontal annular surface, the inner diameter of the first guide unit 29 is equal to the inner diameter of the upper portion of the second guide unit 30 and is smaller than the inner diameter of the lower portion of the second guide unit 30, and the outer diameter of the first guide unit 29 of the guide sleeve 15 is between the upper inner diameter and the lower inner diameter of the third compression unit 28 of the compression sleeve 14, when the compression sleeve 14 is lifted upward, the second shoulder 17 is in contact with the first shoulder 16, preventing the guide sleeve 15 from sliding out of the compression sleeve 14.

[0043] As shown, Figure 4 In this embodiment, four first limiting through holes 18 are arranged around the positioning through hole 9 on the positioning body 8 and penetrate the upper and lower sides of the positioning body 8, the center lines of the four first limiting through holes 18 are located on two vertical intersecting planes A19, and the center line of the positioning through hole 9 is the intersection line of the two planes A19, as shown, Figure 4 In this embodiment, the included angle between the two planes A19 is 39°, the servo motor is a 10-pole motor (i.e., the rotor core has 10 magnetic poles), and each magnetic pole is uniformly distributed by 36°, in order to ensure that the machining space of the positioning through hole 9 and the first limiting through hole 18 is large enough, a step is arranged, 39°-36°=3°, so this embodiment can meet the requirements of two structures with a rotor core pressing angle of 3° and 0°, and the error of the rotor core pressing angle in this embodiment is ±0.1°, wherein Figure 4 、 Figure 9 and Figure 10 are shown for clarity that the two planes A19 have an included angle. As shown, Figure 2 In this embodiment, two second limiting through holes 20 are arranged on the base body 32 of the base assembly 1, both of which are blind holes and are symmetrically distributed on both sides of the support hole 3, and the center lines of the two second limiting through holes 20 and the center line of the support hole 3 are located on the same vertical plane B31, in the use state, the two first limiting through holes 18 located on the same plane A19 correspond to the two second limiting through holes 20 respectively, and the positioning of the positioning body 8 on the base assembly 1 is realized by the limiting rods 21 inserted into the first limiting through holes 18 and the second limiting through holes 20, preventing the positioning body 8 from rotating relative to the base assembly 1 in the use state and affecting the pressing precision of the rotor core 6. Embodiment 2

[0044] This embodiment is a pressing method of a rotor core, which adopts the servo motor straight-pole and inclined-pole dual-purpose rotor core pressing tooling of embodiment 1, and the pressing method of the rotor core includes the following steps: Step 1, place the base assembly 1 on the workbench, the base support 22 is in contact with the workbench, the base assembly 1 is supported by the workbench, the bottom of the rotor shaft 2 is inserted into the support hole 3 of the base assembly 1, the rotor shaft 2 is in a vertical state, the rotor shaft 2 is supported by the base assembly 1, and the rotor shaft 2 is radially limited to prevent the rotor shaft 2 from moving in the radial direction during the pressing of the rotor core 6 on the rotor shaft 2.

[0045] Step 2, place one of the rotor cores 6 on the rotor shaft 2, and set the pressing assembly 7 on the top end of the rotor shaft 2, and press the pressing assembly 7 from the top, and press the rotor core 6 downward by the pressing assembly 7 until the bottom end of the rotor core 6 is in contact with the base assembly 1, then lift the pressing assembly 7 upward, and remove the pressing assembly 7 from the top end of the rotor shaft 2.

[0046] Step 3, set one of the positioning units 5 on the rotor core 6 in step 2, so that the first through hole unit 12 of the positioning unit 5 is located above the second through hole unit 13, and the long strip-shaped protrusion 11 on the rotor core 6 corresponds to the positioning groove 10 in the positioning unit 5, rotate the positioning unit 5, and the rotor core 6 in the positioning unit 5 and the rotor shaft 2 on the rotor core 6 rotate synchronously, so that the two second limiting through holes 20 on the base assembly 1 correspond to the two first limiting through holes 18 on the same plane A19 of the positioning unit 5, and the limiting rods 21 are inserted into the first limiting through holes 18 and the second limiting through holes 20, and the two limiting rods 21 position the positioning unit 5 and the base assembly 1.

[0047] Step 4, take another positioning unit 5, set the positioning unit 5 on the top end of the rotor shaft 2, so that the lower surface of the positioning unit 5 is in contact with the upper surface of the positioning unit 5 on the base assembly 1, and according to the straight pole or inclined pole pressing requirement of the two rotor cores 6, the two limiting rods 21 pass through the corresponding two first limiting through holes 18 on the positioning unit 5, and the first through hole unit 12 on the positioning unit 5 is set downward. Figure 9 As shown in the figure, when the four first limiting through holes 18 on the upper positioning unit 5 correspond to the four first limiting through holes 18 on the lower positioning unit 5, the two rotor cores 6 are used for straight pole pressing. Figure 10 As shown in the figure, when only two first limiting through holes 18 on the upper positioning unit 5 correspond to the two first limiting through holes 18 on the lower positioning unit 5, the two rotor cores 6 are used for inclined pole pressing, and the upper and lower rotor cores 6 on the rotor shaft 2 are pressed in staggered manner, and the angle between the magnetic poles of the two rotor cores 6 is 3°.

[0048] Step 5: Take another rotor core 6 and put it on the rotor shaft 2 from the top end of the rotor shaft 2, and make the long strip protrusion 11 on the rotor core 6 correspond to the positioning groove 10 on the positioning unit 5 above. Put the clamping assembly 7 on the rotor shaft 2 from the top end of the rotor shaft 2, and press the clamping assembly 7 down. The clamping assembly 7 presses the rotor core 6 down until the bottom end of the rotor core 6 is in contact with the top end of the rotor core 6 below it.

[0049] Step 6: Lift up and remove the clamping assembly 7, the limiting rod 21 and the positioning unit 5 in sequence, and remove the press-fitted rotor core 6 from the base assembly 1.

[0050] In this embodiment, the assembly method of the clamping assembly 7 is as follows: the smaller outer diameter end of the guide sleeve 15 is inserted into the clamping sleeve 14 from the larger inner diameter end. In this embodiment, when the clamping assembly 7 is pressed, the guide sleeve 15 is supported upward by the rotor shaft 2 and remains stationary. When the clamping assembly 7 is lifted upward, the guide sleeve 15 remains stationary under its own weight. When the clamping sleeve 14 moves upward until the first shoulder 16 and the second shoulder 17 are in contact, the clamping sleeve 14 is lifted further inward. The guide sleeve 15 moves upward simultaneously with the clamping sleeve 14 until the entire clamping assembly 7 is removed from the rotor shaft 2.

[0051] Unless otherwise specified in the above description, all parts are prior art, or can be implemented using existing technology. Furthermore, the specific embodiments described in this invention are merely preferred embodiments and are not intended to limit the scope of this invention. That is, all equivalent changes and modifications made within the scope of this invention should be considered within the technical scope of this invention.

Claims

1. A servo motor rotor core press-fitting fixture for both direct and skewed poles, characterized in that, include The base assembly has support holes for fixing the rotor shaft during use; A rotor core positioning assembly includes two positioning units. In use, these units are fitted onto the rotor shaft to position the upper and lower rotor cores mounted on the shaft. The two positioning units can be rotated axially to adjust their angle, allowing for the conversion between straight and skewed pole pressing of the two rotor cores. The clamping assembly can be sleeved on the rotor shaft from the top of the rotor shaft in the use state and can move up and down relative to the rotor shaft. It is used to axially position the rotor core and press the rotor core downward to press the rotor core into place.

2. The servo motor direct-pole and skew-pole dual-purpose rotor core press-fitting fixture according to claim 1, characterized in that, The positioning unit includes The positioning body has positioning through holes on its upper and lower sides. When in use, the positioning body is sleeved on the rotor shaft. The rotor core is sleeved on the rotor shaft from the top of the rotor shaft and is positioned in the positioning through holes by the positioning body.

3. The servo motor direct-pole and skew-pole dual-purpose rotor core press-fitting fixture according to claim 2, characterized in that, Positioning grooves are provided on the inner wall of the positioning through hole. There are two or more positioning grooves, which are evenly distributed along the circumference of the positioning through hole. When in use, the positioning grooves cooperate with the long strip-shaped protrusions on the outer surface of the rotor core to perform circumferential positioning of the rotor core.

4. The servo motor direct-pole and skew-pole dual-purpose rotor core press-fitting fixture according to claim 3, characterized in that, The positioning through holes on the positioning unit include a first through hole unit and a second through hole unit, wherein the diameter of the first through hole unit is larger than the diameter of the second through hole unit, the positioning groove is opened on the inner wall of the second through hole unit, and the depth of the second through hole unit is less than the height of the rotor core. In the use state, the first through hole units of the two positioning units are arranged facing each other.

5. The servo motor direct-pole and skew-pole dual-purpose rotor core press-fitting fixture according to claim 1, characterized in that, The clamping assembly includes A clamping sleeve is fitted onto the rotor shaft from the top end when in use. Its bottom end extends into the positioning unit and contacts the top of the rotor core located in the positioning unit. The clamping sleeve is pressed down to press the rotor core down so that the rotor core is pressed into place on the rotor shaft.

6. The motor direct-pole and skew-pole dual-purpose rotor core press-fitting fixture according to claim 5, characterized in that, The clamping assembly also includes A guide sleeve is disposed inside the clamping sleeve and can move up and down inside the clamping sleeve. In use, the bottom end of the guide sleeve is sleeved on the top end of the rotor shaft to guide the up and down movement of the clamping sleeve on the rotor shaft.

7. The dual-purpose rotor core press-fitting fixture for both direct and skew poles of a motor according to claim 6, characterized in that, The inner diameter of the upper part of the clamping sleeve is larger than that of the lower part, forming a first shoulder at the point where the inner diameters of the upper and lower parts of the inner wall of the clamping sleeve change. The outer diameter of the upper part of the guide sleeve is larger than that of the lower part, forming a second shoulder at the point where the outer diameters of the upper and lower parts of the outer wall of the guide sleeve change. The outer diameter of the lower part of the guide sleeve is smaller than that of the lower part of the clamping sleeve, and the outer diameter of the upper part of the guide sleeve is between the inner diameters of the upper and lower parts of the clamping sleeve. When the clamping sleeve is lifted upward, the second shoulder fits into the first shoulder, preventing the guide sleeve from slipping out of the clamping sleeve.

8. The dual-purpose rotor core press-fitting fixture for both direct and skew poles of a motor according to claim 2, characterized in that, The positioning body has four first limiting through holes that extend through its upper and lower sides. The center lines of the four first limiting through holes are located on two intersecting planes A. The center line of the positioning through hole is the intersection line of the two planes A. The base assembly has two second limiting through holes. The center lines of the two second limiting through holes and the center line of the support hole are located on the same plane B. In use, the two first limiting through holes located on the same plane A correspond to the two second limiting through holes respectively. The positioning body is positioned on the base assembly by the limiting rods inserted into the first and second limiting through holes.

9. A method for pressing a rotor core, characterized in that, Includes the following steps: Step 1: Insert the bottom of the rotor shaft into the support hole of the base assembly to make the rotor shaft vertical. Step 2: Place one of the rotor cores on the rotor shaft, press the rotor core down with the clamping assembly until the bottom of the rotor core is in contact with the base assembly, and then remove the clamping assembly from the rotor shaft. Step 3: Place one of the positioning units on the rotor core from Step 2, with the first through hole unit of the positioning unit at the top and the elongated protrusion on the rotor core corresponding to the positioning groove. Rotate the positioning unit so that the two second limiting through holes on the base assembly correspond to the two first limiting through holes on the positioning unit. Insert the limiting rod into the first and second limiting through holes. Step 4: Fit another positioning unit onto the rotor shaft from the top of the rotor shaft and make it fit with the positioning unit located on the base assembly. According to the straight or oblique pole pressing requirements of the two rotor cores, make the two limiting rods pass through the corresponding two first limiting through holes on the positioning unit. The first through hole unit on the positioning unit is set downward. Step 5: Fit another rotor core onto the rotor shaft from the top of the rotor shaft, and align the elongated protrusion on the rotor core with the positioning groove on the positioning unit. Press the rotor core down by the clamping assembly until the bottom of the rotor core is in contact with the top of the rotor core below it. Step 6: Remove the clamping assembly, limit rod and positioning unit in sequence, and remove the press-fitted rotor core from the base assembly.

10. The method for pressing a rotor core according to claim 9, characterized in that, The assembly method of the clamping assembly is to insert the end of the guide sleeve with a smaller outer diameter into the clamping sleeve with a larger inner diameter.

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