Motor rotor core lamination pressing tool

Abstract

The utility model discloses a motor rotor iron core stacks pressure tool belongs to motor production assembly technical field, including base, briquetting and gland, the iron core punch piece of stacking is placed in the base, rotor shaft passes the iron core punch piece, and the output end of rotor shaft is from the base and is taken out, and the input end of rotor shaft is sleeved in briquetting and gland, and briquetting is pressed on the iron core punch piece, and the input end of rotor shaft is wrapped in the gland. The inner wall of base is equipped with guide strip, and guide strip is matched with winding groove, and the positioning of iron core punch piece is carried out. Briquetting carries out the circumferential pressure of iron core punch piece, and the axial pressure of rotor shaft is carried out in the gland. The utility model discloses a motor rotor iron core stacks pressure tool through briquetting and gland can effectively realize even stress in the rotor iron core pressure mounting process, and accurate positioning is realized through guide strip, and the surface of rotor iron core is even after stacking, and is combined closely between each other, and the stacking process is simple, and the stacking efficiency is high, and the pressure mounting precision is high.

Description

Technical Field

[0001] This utility model relates to the field of motor manufacturing and assembly, and in particular to a motor rotor core stacking fixture. Background Technology

[0002] With the advancement of industrialization, electric motors have been widely used in many fields. In the electric motor industry, the rotor core is one of the important components of an electric motor. It is mainly composed of stacked core laminations and a rotor shaft. The rotor core and windings work together to form a regular magnetic field when an electric current is present, thereby realizing the special functions of the electric motor.

[0003] Multiple winding slots are machined on the outer circumference of the stacked core laminations. Winding assemblies are embedded in these slots, and the stacking quality of the rotor cores significantly affects the motor's performance. Due to the presence of these winding slots, the most critical issue in rotor core pressing is achieving precise positioning. During the stacking process, each winding slot on each core lamination must correspond precisely. This is not only for ease of subsequent winding, but also because the winding slots and windings significantly influence the magnetic field distribution. If positioning errors occur, the precision of the pressed rotor core will be poor, making it unsuitable for practical application. Furthermore, during the interference fit assembly of the stacked core laminations and rotor shaft, a single pressure head is typically used to press both the core laminations and rotor shaft. This can easily lead to uneven pressure on the core laminations and rotor shaft, making it difficult to control the rotor core dimensions precisely and affecting assembly accuracy. Utility Model Content

[0004] The present invention aims to provide a tooling for stacking motor rotor cores, so as to achieve uniform clamping force and precise positioning during the pressing process of rotor cores.

[0005] To achieve the above objectives, the present invention provides a motor rotor core stacking fixture, comprising a base, a pressing block, and a pressing cover. Stacked core laminations are placed in the base, a rotor shaft passes through the core laminations, and the output end of the rotor shaft extends out from the base. The pressing block and the pressing cover are fitted onto the input end of the rotor shaft, the pressing block presses on the core laminations, and the pressing cover covers the input end of the rotor shaft.

[0006] In a preferred embodiment of the present invention, the motor rotor core stacking fixture further includes a spacer block, which is fitted onto the input end of the rotor shaft and is located between the pressure block and the pressure cover.

[0007] In a preferred embodiment of this utility model, the motor rotor core stacking fixture further includes guide bars, which are symmetrically installed on the inner wall of the base, and the guide bars are matched with the winding grooves of the core laminations.

[0008] In a preferred embodiment of this utility model, the base includes a chassis, a receiving cavity, and a mounting groove. The receiving cavity is fixedly installed on the chassis, and the iron core lamination is placed inside the receiving cavity. The mounting grooves are symmetrically formed on the inner wall of the receiving cavity, and the guide strips are installed inside the mounting grooves.

[0009] In a preferred embodiment of this utility model, the cross-section of the mounting groove and the connecting portion of the guide strip are matched.

[0010] In a preferred embodiment of this utility model, a notch is provided on the pressure block, and the notch corresponds to the shape and position of the guide strip. During pressing, the guide strip passes through the notch.

[0011] In a preferred embodiment of the present invention, the base further includes an opening, which is symmetrically opened on the side wall of the receiving cavity and extends downward from the upper end of the receiving cavity.

[0012] In a preferred embodiment of this utility model, the width of the opening is greater than the width of the outer edge of the rotor teeth of the core lamination.

[0013] In a preferred embodiment of the present invention, the base further includes a shaft hole, which is located at the center of the chassis and the receiving cavity. The shaft hole is coaxial with the iron core lamination, and the output end of the rotor shaft extends out from the shaft hole.

[0014] In a preferred embodiment of the present invention, the motor rotor core stacking fixture further includes a driving device. The driving device is connected to the pressure block and the pressure cover. The driving device drives the pressure block to circumferentially press the core laminations, and the driving device drives the pressure cover to axially press the rotor shaft.

[0015] This utility model discloses a motor rotor core stacking fixture, which effectively achieves uniform force distribution during rotor core pressing through pressure blocks and pressure caps, and achieves precise positioning through guide bars. After stacking, the surface of the rotor core is flat and the parts are tightly connected. The stacking process is simple, efficient, and accurate. Furthermore, the guide bars are detachable and replaceable to adapt to different rotor core models. The structure is simple, adaptable to different drive equipment, and can also be manually pressed. At the same time, an opening is made on the base to facilitate observation of the pressing progress and easy removal of the pressed rotor core.

[0016] To make the above-mentioned features and advantages of the utility model more apparent and understandable, specific embodiments are described below, and detailed descriptions are provided in conjunction with the accompanying drawings. Attached Figure Description

[0017] Figure 1 This is an exploded view of the motor rotor core stacking fixture of this utility model.

[0018] Figure 2 This is a schematic diagram of the overall structure of the motor rotor core stacking fixture of this utility model.

[0019] Figure 3 for Figure 2 A cross-sectional schematic diagram.

[0020] 1-Motor rotor core stacking fixture; 11-Base; 111-Chassis; 112-Receiving cavity; 113-Mounting slot; 114-Opening; 115-Shaft hole; 12-Guide strip; 13-Pressure block; 131-Notch; 14-Spacer block; 15-Pressure cover; 2-Rotor core; 21-Core lamination; 22-Rotor shaft; 221-Output end; 222-Input end; 23-First end cover; 24-Second end cover; 25-Rotor teeth; 26-Winding groove. In the accompanying drawings, similar reference numerals refer to the same elements. Detailed Implementation

[0021] To make the objectives and technical solutions of the present utility model embodiments clearer, the following will be described in conjunction with the accompanying drawings of the present utility model embodiments. Figure 1 -Appendix Figure 3 The technical solutions of the embodiments of this utility model are clearly and completely described herein. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0022] like Figure 1 As shown, a motor rotor core stacking fixture 1 is used for press-fitting rotor cores 2 in the production of motors. The rotor core 2 includes stacked core laminations 21 and a rotor shaft 22. The rotor shaft 22 passes through several stacked core laminations 21. The motor rotor core stacking fixture 1 performs a stacking process, so that the rotor shaft 22 and the stacked core laminations 21 are interference-fitted. For ease of description, the two ends of the rotor shaft 22 are respectively designated as an output end 221 and an input end 222 according to their functions.

[0023] The rotor core 2 also includes a first end cover 23 and a second end cover 24. The first end cover 23 and the second end cover 24 are coaxially stacked at the upper and lower ends of the stacked core laminations 21. The first end cover 23, the core laminations 21 and the second end cover 24 are passed through the rotor shaft 22. The first end cover 23 is close to the output end 221 of the rotor shaft 22 and the second end cover 24 is close to the input end 222 of the rotor shaft 22.

[0024] The rotor core 2 also includes rotor teeth 25 and winding slots 26. A plurality of rotor teeth 25 are evenly arranged on the outer edge of the core lamination 21, and the winding slots 26 are formed between adjacent rotor teeth 25. The rotor teeth 25 and the winding slots 26 are used to wind the winding.

[0025] It should be noted that since the structure of the rotor core 2 is common knowledge in the field, it will not be described in detail in this utility model.

[0026] like Figure 2 As shown, the motor rotor core stacking fixture 1 includes a base 11 and guide bars 12. The base 11 is used to circumferentially position the stacked core laminations 21. At least two guide bars 12 are symmetrically installed on the inner wall of the base 11. The guide bars 12 are used to guide the stacked core laminations 21 into the base 11 and to position the core laminations 21 during the pressing process, so that the winding grooves 26 on each core lamination 21 correspond, preventing the stacked core laminations 21 from shifting during the pressing process and affecting subsequent winding operations.

[0027] Specifically, the first end cap 23, the plurality of core laminations 21, and the second end cap 24 are stacked sequentially in the base 11 along the direction of the guide strip 12. The first end cap 23 contacts the bottom surface of the base 11, and the guide strip 12 extends into the winding groove 26 for positioning. The rotor shaft 22 passes through the first end cap 23, the core laminations 21, and the second end cap 24, and the output end 221 of the rotor shaft 22 exits from the base 11. Specifically, the upper edges of the base 11 and the guide bar 12 are both higher than the placement position of the first end cover 23 to prevent the iron core lamination 21 and the second end cover 24 located above from undergoing radial displacement.

[0028] like Figure 2As shown, the motor rotor core stacking fixture 1 further includes a pressure block 13, a spacer block 14, and a pressure cover 15. The pressure block 13 is fitted onto the input end 222 of the rotor shaft 22 and stacked above the second end cover 24. The edge of the pressure block 13 fits against the inner wall of the receiving cavity 112. The pressure block 13 is used to apply pressure evenly to the core laminations 21 and to circumferentially press the core laminations 21 so that the core laminations 21 fit tightly together. The spacer block 14 is fitted onto the input end 222 of the rotor shaft 22 and stacked on the pressure block 13. The pressure cap 15 is fitted onto the input end 222 of the rotor shaft 22 and fits tightly against the spacer block 14. The length of the spacer block 14 is selected according to actual needs, so that the spacer block 14 and the pressure cap 15 completely enclose the rotor shaft 22. The pressure cap 15 axially presses the rotor shaft 22, so that the rotor shaft 22 and the intermediate hole of the iron core lamination 21 are interference-fitted. The spacer block 14 is used to protect the rotor shaft 22 and transmit pressure, preventing deformation of the rotor shaft 22 during the pressing process. The pressure block 13 and the pressure cap 15 are connected to the driving device (not shown in the figure). The driving device simultaneously applies pressure to the pressure cap 15 and the pressure block 13 to press the iron core lamination 21 and the rotor shaft 24, so that each layer of the iron core lamination 21 fits tightly, and further presses the rotor shaft 24 downward to ensure that the size of the rotor iron core 2 after stacking matches the set size.

[0029] like Figure 2 As shown, specifically, the edge of the pressing block 13 has a notch 131, which corresponds to the position and shape of the guide strip 12. During pressing, the guide strip 12 passes through the notch 131 to avoid the guide strip 12 affecting the pressing, and the pressing block 13 can perform the pressing action more smoothly.

[0030] like Figure 3 As shown, the base 11 includes a chassis 111 and a receiving cavity 112. The cylindrical receiving cavity 112 is fixedly connected to the chassis 111. The receiving cavity 112 is used to accommodate the first end cap 23, the iron core lamination 21 and the second end cap 24.

[0031] like Figure 3 As shown, the base 11 also includes mounting grooves 113, at least two of which are formed on the inner wall of the receiving cavity 112. The mounting grooves 113 extend from the upper end face of the receiving cavity 112 to the bottom, and the guide strip 12 is installed in the mounting grooves 113.

[0032] Specifically, the cross-sectional shape of the mounting groove 113 is narrow at the opening to prevent the guide strip 12 from falling off, and the cross-section of the guide strip 12 that connects to the mounting groove 113 fits.

[0033] Furthermore, the cross-sectional shape of the guide strip 12 extending into the winding groove 26 can be one of the two shapes shown in the attached figures. It can be the same shape as the winding groove 26 or it can be another shape. The guide strip 12 only needs to fit into the mounting groove 113 to achieve a positioning effect. The guide strip 12 can be selected according to the actual model of the iron core lamination 21. During the process of the iron core lamination 21 being placed into the receiving cavity 112, the winding groove 26 matches the guide strip 12, so that the position of the winding groove 26 on each iron core lamination 21 corresponds one-to-one, achieving circumferential positioning.

[0034] like Figure 2 As shown, the base 11 also includes an opening 114, which is symmetrically opened on the side wall of the receiving cavity 112. The opening 114 extends downward from the upper end of the receiving cavity 112. The opening 114 is used to observe the pressing progress of the core lamination 21, and after pressing, it is convenient to insert a clamping device from the opening 114 to remove the rotor core 2.

[0035] Specifically, the width of the opening 114 is greater than the width of the outer edge of the rotor tooth 25, so that the clamping device can be inserted into the winding grooves 26 on both sides to clamp the rotor tooth 25 and remove the rotor core 2.

[0036] like Figure 3 As shown, the base 11 also includes a shaft hole 115, which is located at the center of the chassis 111 and the receiving cavity 112. The shaft hole 115 is coaxial with the iron core lamination 21 and passes through the chassis 111 and the shaft portion 112. The output end 221 of the rotor shaft 22 extends out from the shaft hole 115.

[0037] The specific working process of the motor rotor core stacking fixture 1 is as follows: The first end cover 23, the core lamination 21, and the second end cover 24 are sequentially placed into the receiving cavity 112 along the guide strip 12. During placement, the guide strip 12 extends into the winding groove 26 for positioning. Then, the rotor shaft 22 passes through the first end cover 23, the core lamination 21, and the second end cover 24. The output end 221 of the rotor shaft 22 extends out from the shaft hole 115. The input end 222 of the rotor shaft 22 is sequentially fitted with the pressure block 13, the spacer block 14, and the pressure cover 15. The driving device is pressed against the pressure block 13 and the pressure cover 15. The driving device is started and pressure is applied to the pressure block 13 and the pressure cover 15 for pressing. The pressure block 13 circumferentially presses the core lamination 21, and the pressure cover 15 axially presses the rotor shaft 22. The operator can observe the pressing process of the core lamination 21 from the opening 114. After pressing is completed, remove the pressing block 13, the spacer block 14 and the pressing cover 15, insert the clamping device through the opening 114, and take out the rotor core 2 after pressing by clamping the rotor teeth 25.

[0038] This utility model discloses a motor rotor core stacking fixture, which effectively achieves uniform force distribution during rotor core pressing through pressure blocks and pressure caps, and achieves precise positioning through guide bars. After stacking, the surface of the rotor core is flat and the parts are tightly connected. The stacking process is simple, efficient, and accurate. Furthermore, the guide bars are detachable and replaceable to adapt to different rotor core models. The structure is simple, adaptable to different drive equipment, and can also be manually pressed. At the same time, an opening is made on the base to facilitate observation of the pressing progress and easy removal of the pressed rotor core.

[0039] Although the present invention has been disclosed above by way of embodiments, it is not intended to limit the present invention. Anyone skilled in the art can make some modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A tooling for stacking motor rotor cores, characterized in that, The device includes a base, a pressure block, and a pressure cover. Stacked iron core laminations are placed in the base, and a rotor shaft passes through the iron core laminations. The output end of the rotor shaft extends out from the base. The pressure block and the pressure cover are fitted onto the input end of the rotor shaft. The pressure block presses on the iron core laminations, and the pressure cover covers the input end of the rotor shaft.

2. The motor rotor core stacking fixture as described in claim 1, characterized in that, The motor rotor core stacking fixture also includes a spacer block, which is fitted onto the input end of the rotor shaft and is located between the pressure block and the pressure cover.

3. The motor rotor core stacking fixture as described in claim 2, characterized in that, The motor rotor core stacking fixture also includes guide bars, which are symmetrically installed on the inner wall of the base and match the winding slots of the core laminations.

4. The motor rotor core stacking fixture as described in claim 3, characterized in that, The base includes a chassis, a receiving cavity, and a mounting groove. The receiving cavity is fixedly installed on the chassis. The iron core lamination is placed inside the receiving cavity. The mounting grooves are symmetrically opened on the inner wall of the receiving cavity, and the guide strips are installed in the mounting grooves.

5. The motor rotor core stacking fixture as described in claim 4, characterized in that, The cross-section of the mounting groove and the connecting part of the guide strip are matched.

6. The motor rotor core stacking fixture as described in claim 5, characterized in that, The pressure block has a notch, which corresponds to the shape and position of the guide strip. During pressing, the guide strip passes through the notch.

7. The motor rotor core stacking fixture as described in claim 6, characterized in that, The base also includes an opening symmetrically formed on the side wall of the receiving cavity, extending downward from the upper end of the receiving cavity.

8. The motor rotor core stacking fixture as described in claim 7, characterized in that, The width of the opening is greater than the width of the outer edge of the rotor teeth of the core lamination.

9. The motor rotor core stacking fixture as described in claim 8, characterized in that, The base also includes a shaft hole, which is located at the center of the chassis and the receiving cavity. The shaft hole is coaxial with the iron core lamination, and the output end of the rotor shaft extends out from the shaft hole.

10. The motor rotor core stacking fixture as described in claim 9, characterized in that, The motor rotor core stacking fixture also includes a driving device, which is connected to the pressure block and the pressure cover. The driving device drives the pressure block to circumferentially press the core laminations, and the driving device drives the pressure cover to axially press the rotor shaft.

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