Motor rotor shaft press-fitting device

Abstract

The utility model discloses a motor rotor shaft press -fitting device including the chassis, the chassis is provided with the mobile mechanism, be provided with multiple groups of placing mechanism on the mobile mechanism, the mobile mechanism is used to drive placing mechanism to carry out linear reciprocation, and placing mechanism is used for placing motor rotor shaft and rotor iron core, still be provided with the press -in mechanism on the chassis, and the press -in mechanism is used for the motor rotor shaft on placing mechanism press -in to the rotor iron core, and placing mechanism includes the base plate fixed on the mobile mechanism, and the base plate is fixed with lower bottom plate, and the four corner position of lower bottom plate inserts and is equipped with the fixed column, and the spring is equipped with on the fixed column sleeve the spring is installed with the shaft sleeve, and its four the shaft sleeve is fixed on the upper bottom plate, and the fixed column is fixed with the mounting table on lower bottom plate, and the fixed column is fixed with the mounting table in the middle part and is equipped with the fixed column for placing motor rotor shaft, and the center of upper bottom plate is installed with the fixed platform for placing rotor iron core, and the center of fixed platform is equipped with the hole for giving place, and the hole for giving place is adapted with fixed platform.

Description

Technical Field

[0001] This utility model relates to the field of new energy vehicle motor technology, and in particular to a motor rotor shaft press-fitting device. Background Technology

[0002] In the current era of rapid development in the new energy electric vehicle industry, the electric drive system, as one of the core components of "three electrics" (battery, motor, and electronic control), plays a crucial role in vehicle performance. Its performance directly affects not only the acceleration performance of new energy electric vehicles but also noise control and stability during vehicle operation, making it a vital component second only to the battery. Currently, most mainstream pure electric vehicles worldwide use permanent magnet synchronous motors and AC induction (asynchronous) motors. Among them, permanent magnet synchronous motors, with their permanent magnet excitation characteristics, simplify the motor structure, reduce processing and assembly costs, and eliminate the faulty slip rings and brushes, significantly improving operational reliability, thus becoming the mainstream choice in the market.

[0003] However, different types of permanent magnet synchronous motors exhibit significant differences in their rotor core structures, encompassing various forms such as one-piece, two-layer, and four-layer designs. In the rotor manufacturing process, the preceding steps involve stacking the cores, applying adhesive to the magnet holes, and inserting the magnets. The subsequent crucial step is pressing the connecting shaft into the rotor core through the center hole with an interference fit, ensuring the reliability of rotor operation. However, existing methods for pressing motor rotor shafts largely rely on manual operation or simple mechanical devices, which have numerous drawbacks. Manual pressing is extremely inefficient, failing to meet the growing market demand for new energy electric vehicles. Furthermore, prolonged work can lead to operator fatigue, resulting in problems such as pressing position deviations and uneven pressing force, affecting the assembly accuracy of the rotor core and motor rotor shaft, and consequently reducing the overall performance of the motor. Simple mechanical devices, on the other hand, have low automation levels and cannot accurately adapt to various rotor core structures, making it difficult to quickly, stably, and reliably press the motor rotor shaft. When faced with rotor cores of complex shapes or sizes, incomplete pressing and loose fit between the shaft and core often occur, severely restricting the production quality and efficiency of permanent magnet synchronous motors. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a motor rotor shaft pressing device. This device uses a servo press for pressing. In the early stage, the final model is determined by actual pressing and testing of the rotor core and shaft. Due to the large pressing force and the difference between the shaft and core placement platform and the pressing position, after the shaft and core are placed, they are transported to the pressing position by a servo slide. During the pressing process, due to the large pressing force, the pressing reaction force cannot act on the slide. The placement platform adopts a floating structure. In the initial stage of pressing, the reaction force is transferred to the press's own frame. Through the action and reaction forces of its own frame, the feasibility of pressing strength is ensured.

[0005] The objective of this utility model is achieved through the following technical solution:

[0006] A motor rotor shaft press-fitting device, comprising:

[0007] The base frame is equipped with a moving mechanism, which has multiple sets of placement mechanisms. The moving mechanism drives the placement mechanisms to perform linear reciprocating motion. The placement mechanisms are used to place the motor rotor shaft and rotor core. The base frame is also equipped with a pressing mechanism, which is used to press the motor rotor shaft on the placement mechanism into the rotor core.

[0008] In one or more embodiments of this utility model, the placement mechanism includes a base plate fixed to a transfer mechanism, a lower base plate fixed on the base plate, fixing posts inserted at the four corners of the lower base plate, springs sleeved on the fixing posts, bushings mounted on the springs, and an upper base plate fixed on the four bushings; a mounting platform fixed on the lower base plate, a vertical shaft seat for placing the motor rotor shaft inserted and fixed in the middle of the mounting platform, and a fixing platform for placing the rotor core installed at the center of the upper base plate, with a clearance hole at the center of the fixing platform that is adapted to the fixing platform.

[0009] In one or more embodiments of this utility model, the placement mechanism is further provided with a clamping assembly for fastening the motor rotor shaft. The clamping assembly includes a cylinder seat fixed to the outside of the mounting platform, a clamping cylinder fixed on the cylinder seat, and two opposing drive rods fixed to the output end of the clamping cylinder. Two opposing elongated slots are opened on the outside of the vertical shaft seat, and a clamping rod is provided in the elongated slot. A pin is also fixed in the elongated slot. The pin passes through the middle of the clamping rod, and both ends of the clamping rod can rotate around the pin. The upper end of the clamping rod clamps the motor rotor shaft. Two pressure posts are fixed on the end face of the extension end of the drive rod, and the lower end of the clamping rod is located between the two pressure posts.

[0010] In one or more embodiments of this utility model, the transfer mechanism includes a rectangular frame fixed to a base frame, two parallel linear slide rails fixed on the rectangular frame, a slider slidably disposed on the linear slide rails, a slide plate fixed on the slider, and multiple sets of the placement mechanism fixed on the slide plate; a long seat is also fixed to the outer side of the rectangular frame, a long rack is fixed to the long seat, a transfer motor is also fixed to the slide plate, and a gear is fixed to the output end of the transfer motor, the gear meshing with the long rack.

[0011] In one or more embodiments of this utility model, the pressing mechanism includes a fixed base fixed to the base frame, two opposing upright plates fixed on the fixed base, and a top plate fixed on the upright plates; the middle part of the moving mechanism is located on the upper side of the fixed base and between the two upright plates; a servo press is fixed on the upright plates, and the output end of the servo press faces downward and is fixed with a pressure column.

[0012] In one or more embodiments of this utility model, an oiling mechanism is further provided on the base frame. The oiling mechanism includes a base plate fixed to the base frame, a fixing frame fixed to the base plate, a cylindrical shell fixed to the fixing frame, a turntable rotatably mounted on the middle of the cylindrical shell via a bearing, a large gear sleeved under the turntable, a rotating motor fixed to the lower side of the fixing frame, a rotating rod mounted on the output end of the rotating motor, the upper end of the rotating rod extending into the cylindrical shell and fixed with a small gear, the small gear meshing with the large gear; a mounting base plate is fixed on the turntable, a mounting seat for placing the motor rotor shaft is fixed on the upper side of the mounting base plate; an oiling assembly is also fixed on the base plate, an oiling sponge is provided at the output end of the oiling assembly, and the oiling assembly controls the oiling sponge to apply oil to the motor rotor shaft on the mounting seat.

[0013] In one or more embodiments of this utility model, the oiling assembly includes a longitudinal electric cylinder fixed on the base plate, a transverse electric cylinder fixed on the output end, a base fixed to the output end of the transverse electric cylinder, and an oiling sponge fixed in the extension end of the base by a mounting block.

[0014] In one or more embodiments of this utility model, the overall appearance of the mounting base is a triangular prism structure, and a fastening cylinder is fixed on the upper side of the mounting base and on the outer plane of the mounting base. A clamping block for clamping the motor rotor shaft is fixed on the output end of the fastening cylinder.

[0015] The beneficial effects of this utility model are:

[0016] The clamping assembly in this invention, through the ingenious cooperation of a clamping cylinder, drive rod, clamping column, and clamping rod, can accurately and stably fasten the motor rotor, preventing displacement during the pressing process. The pressing mechanism employs a servo press, which can precisely control the pressing force and stroke. Combined with the clearance hole of the fixed platform and the precise positioning of the vertical shaft seat, it ensures that the motor rotor shaft can be accurately pressed into the rotor core, effectively avoiding the problem of motor performance degradation caused by pressing deviation, and improving the product qualification rate and consistency. This device fully considers the diversity of rotor core structures of different permanent magnet synchronous motors. The clamping column of the pressing mechanism adopts a replaceable clamping head design, which can adapt to various forms of rotor cores such as one-piece, two-layer, and four-layer. In the oiling mechanism, the triangular prism structure of the mounting base, together with the clamping cylinder and clamping block, can firmly clamp motor rotor shafts of different specifications. At the same time, the oiling assembly, through the combination of longitudinal and transverse electric cylinders, can flexibly adjust the oiling position and range. This device realizes intelligent and automated pressing of shafts and iron cores, solving the problem of manual shaft oiling and manual handling of iron cores, freeing up manpower and saving labor costs, while improving production efficiency and pressing stability, ensuring the accuracy and reliability of shaft and iron core pressing, and allowing traceability of the cause of subsequent product problems. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the transfer mechanism;

[0019] Figure 3 This is a schematic diagram of the pressing mechanism;

[0020] Figure 4 This is a schematic diagram of the oiling mechanism;

[0021] Figure 5 yes Figure 4 A schematic diagram of the structure after removing the cylindrical shell;

[0022] Figure 6 This is a structural diagram of the placement mechanism;

[0023] Figure 7 yes Figure 6 A schematic diagram of the structure after removing the mounting platform;

[0024] Figure 8 This is a structural schematic diagram of the clamping assembly. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, embodiments of this utility model. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely represents selected embodiments of the utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0026] In this embodiment, as Figures 1 to 8 As shown, a motor rotor shaft press-fitting device is mainly composed of a base frame, a transfer mechanism A, a placement mechanism B, a pressing mechanism C, and an oiling mechanism D, which can realize efficient and precise press-fitting of the rotor core and the motor rotor shaft.

[0027] The base frame 1, serving as the fundamental support structure of the entire device, is welded from high-strength steel to ensure the stability of the device during operation. A transfer mechanism is installed on the base frame 1, comprising a rectangular frame fixed to the base frame 1. Two parallel linear guide rails 15 are fixed on the rectangular frame, and sliders slide along the linear guide rails 15. Slide plates 16 are fixed to the sliders, and multiple placement mechanisms are fixed to the slide plates 16. A long seat 17 is also fixed to the outer side of the rectangular frame, and a long rack 18 is fixed to the long seat 17. A transfer motor 19 is also fixed to the slide plate 16, and a gear is fixed to the output end of the transfer motor 19, meshing with the long rack 18. When the transfer motor 19 operates, the meshing transmission between the gear and the long rack 18 drives the slide plate 16 to perform linear reciprocating motion on the linear guide rails 15, thereby realizing the positional movement of the placement mechanisms.

[0028] The placement mechanism is fixed to the slide plate 16 and is used to place the motor rotor shaft and rotor core. The placement mechanism includes a base plate 2 fixed to the transfer mechanism, a lower base plate 3 fixed on the base plate 2, fixing posts 4 inserted at the four corners of the lower base plate 3, springs 5 ​​sleeved on the fixing posts 4, bushings 6 mounted on the springs 5, and an upper base plate 7 fixed on the four bushings 6. A mounting platform 8 is fixed on the lower base plate 3, a vertical shaft seat 9 for placing the motor rotor shaft is inserted and fixed in the middle of the mounting platform 8, and a fixing platform 10 for placing the rotor core is installed at the center of the upper base plate 7. The fixing platform 10 has a clearance hole in its center, which is adapted to the vertical shaft seat 9. The placement mechanism is also provided with a clamping assembly for fastening the motor rotor shaft. The clamping assembly includes a cylinder seat fixed to the outside of the mounting platform 8, a clamping cylinder 11 fixed on the cylinder seat, and two opposing drive rods 12 fixed to the output end of the clamping cylinder 11. Two opposing elongated slots are formed on the outer side of the vertical shaft seat 9. A clamping rod 13 is installed in each slot, and a pin is fixed within the slot. The pin passes through the middle of the clamping rod 13, allowing both ends of the clamping rod 13 to rotate around the pin. The upper end of the clamping rod 13 clamps the motor rotor shaft. Two pressure posts 14 are fixed to the end face of the extension end of the drive rod 12, with the lower end of the clamping rod 13 located between the two pressure posts 14. When the clamping cylinder 11 operates, the drive rod 12 pushes the pressure posts 14 to move, thereby causing the clamping rod 13 to rotate around the pin, thus clamping the upper end of the clamping rod 13 onto the motor rotor shaft and ensuring the stability of the motor rotor shaft during the pressing process. Two opposing limiting shafts are also fixed on the fixed platform 10, used to limit and fix the rotor core.

[0029] The pressing mechanism is fixed to the base frame 1 and is used to press the motor rotor shaft on the placement mechanism into the rotor core. The pressing mechanism includes a fixed base 20 fixed to the base frame 1, two opposing upright plates 21 fixed on the fixed base 20, and a top plate 22 fixed on the upright plates 21. The middle part of the transfer mechanism is located above the fixed base 20 and between the two upright plates 21. A servo press 22 is fixed on the upright plate 21, with the output end of the servo press 22 facing downward and a pressure column fixed thereon. When the placement mechanism moves below the pressing mechanism, the servo press 22 operates, the pressure column moves downward, driving the rotor core and the upper base plate 7 downward, so that the motor rotor shaft is pressed into the rotor core. Then the servo press 22 returns, and the spring 5 resets, driving the assembled motor rotor shaft and rotor core upward, and then moving them out through the transfer mechanism.

[0030] The oiling mechanism is also fixed to the base frame 1 and is used to apply oil to the motor rotor shaft. The oiling mechanism includes a base plate fixed to the base frame 1, a fixed frame fixed to the base plate, a cylindrical shell 23 fixed to the fixed frame, a turntable 24 rotatably mounted in the middle of the cylindrical shell 23 via a bearing, a large gear 25 fitted under the turntable 24, a rotating motor 26 fixed to the lower side of the fixed frame, a rotating rod mounted at the output end of the rotating motor 26, the upper end of the rotating rod extending into the cylindrical shell 23 and fixed with a small gear 27, which meshes with the large gear 25. A mounting base plate 28 is fixed to the turntable 24, and a mounting seat 29 for placing the motor rotor shaft is fixed to the upper side of the mounting base plate 28. An oiling assembly is also fixed to the base plate, and an oiling sponge 30 is provided at the output end of the oiling assembly. The oiling assembly controls the oiling sponge 30 to apply oil to the motor rotor shaft on the mounting seat 29. The oiling assembly includes a longitudinal electric cylinder 31 fixed to the base plate, a transverse electric cylinder 32 fixed to the output end of the longitudinal electric cylinder 31, a base 33 fixed to the output end of the transverse electric cylinder 32, and an oiling sponge 30 fixed to the extension end of the base 33 via a mounting block. The mounting base 29 has a triangular prism structure. A fastening cylinder 34 is fixed to the upper side of the mounting base plate 28 and to the outer plane of the mounting base 29. A clamping block 35 for clamping the motor rotor shaft is fixed to the output end of the fastening cylinder 34. When oiling the motor rotor shaft is required, the motor rotor shaft is placed on the mounting base 29, the fastening cylinder 34 operates, and the clamping block 35 clamps the motor rotor shaft. The rotating motor 26 operates, driving the turntable 24 to rotate through the meshing of the pinion 27 and the gear 25, causing the motor rotor shaft to rotate. The longitudinal electric cylinder 31 and the transverse electric cylinder 32 work together to move the oiling sponge 30 to the position of the motor rotor shaft for oiling.

[0031] The device is also equipped with an oil circuit structure, which delivers oil to the oiled sponge 30 and controls the flow rate.

[0032] The device is also equipped with a robotic arm. The robotic arm places the motor rotor shaft on the mounting base 29 for oiling. After oiling, the robotic arm clamps the oiled motor rotor shaft onto the vertical shaft base 9. Then, the robotic arm clamps the rotor core onto the fixed platform 10. The motor rotor shaft is then pressed into the rotor core by the pressing mechanism. After pressing, the robotic arm clamps it out.

[0033] In another embodiment, in the transfer mechanism, the linear guide rail 15 is bolted to the rectangular frame, and the slider and the slide plate 16 are welded together to improve the strength of the connection. The transfer motor 19 is a servo motor, which can precisely control the movement position and speed of the slide plate 16, further improving the pressing accuracy.

[0034] For the placement mechanism, the base plate 2 and the slide plate 16 are positioned using pins and fixed with bolts to ensure accurate installation. The spring coefficient of the spring 5 is optimized based on the weight of the motor rotor and the pressing force to ensure that it can provide appropriate buffering force during the pressing process.

[0035] In the pressing mechanism, the servo press 22 is a high-precision model, capable of accurately controlling the pressing force and pressing stroke. The end of the pressing column adopts a replaceable pressing head design, and different shapes of pressing heads can be replaced according to different models of motor rotors and rotor cores, improving the versatility of the device.

[0036] In the oiling mechanism, the oiling sponge 30 is made of a material with high oil absorption performance, which can evenly apply lubricating oil to the motor rotor shaft. The longitudinal electric cylinder 31 and the transverse electric cylinder 32 adopt high-precision ball screw transmission to improve the accuracy of the oiling position.

[0037] Working principle of this utility model:

[0038] The motor rotor shaft is placed on the mounting base 29 by a robotic arm and then oiled. After oiling, the robotic arm clamps the oiled motor rotor shaft onto the vertical shaft base 9. The robotic arm then places the rotor core onto the fixed table 10. Subsequently, the clamping cylinder 11 operates to clamp the motor rotor shaft. The moving motor 19 operates, driving the placement mechanism to move below the pressing mechanism. The servo press 22 operates to press the motor rotor shaft into the rotor core, completing the pressing operation.

[0039] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "left," and "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance. In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, terms such as "set" and "connect" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

Claims

1. A motor rotor shaft press-fitting device, characterized in that, include: The base frame (1) is provided with a moving mechanism. The moving mechanism is provided with multiple sets of placement mechanisms. The moving mechanism is driven to perform linear reciprocating motion. The placement mechanism is used to place the motor rotor shaft and rotor core. The base frame is also provided with a pressing mechanism. The pressing mechanism is used to press the motor rotor shaft on the placement mechanism into the rotor core.

2. The motor rotor shaft press-fitting device according to claim 1, characterized in that: The placement mechanism includes a base plate (2) fixed on the transfer mechanism. A lower base plate (3) is fixed on the base plate (2). Fixing posts (4) are inserted at the four corners of the lower base plate (3). Springs (5) are sleeved on the fixing posts (4). Bushings (6) are installed on the springs (5). An upper base plate (7) is fixed on the four bushings (6). An installation platform (8) is fixed on the lower base plate (3). A vertical shaft seat (9) for placing the motor rotor shaft is inserted and fixed in the middle of the installation platform (8). A fixing platform (10) for placing the rotor core is installed at the center of the upper base plate (7). A clearance hole is opened in the center of the fixing platform (10). The clearance hole is adapted to the fixing platform (10).

3. The motor rotor shaft press-fitting device according to claim 2, characterized in that: The placement mechanism is also equipped with a clamping assembly for fastening the motor rotor shaft. The clamping assembly includes a cylinder seat fixed to the outside of the mounting platform (8). A clamping cylinder (11) is fixed on the cylinder seat. Two opposing drive rods (12) are fixed at the output end of the clamping cylinder (11). Two opposing long slots are opened on the outside of the vertical shaft seat (9). A clamping rod (13) is provided in the long slot. A pin is also fixed in the long slot. The pin passes through the middle of the clamping rod (13). The two ends of the clamping rod (13) can rotate with the pin as the rotation point. The upper end of the clamping rod (13) clamps the motor rotor shaft. Two pressure columns (14) are fixed on the end face of the extension end of the drive rod (12). The lower end of the clamping rod (13) is located between the two pressure columns (14).

4. The motor rotor shaft press-fitting device according to claim 1, characterized in that: The transfer mechanism includes a rectangular frame fixed on the base frame (1), two parallel linear slide rails (15) fixed on the rectangular frame, a slider slidably arranged on the linear slide rail, a slide plate (16) fixed on the slider, and multiple sets of the placement mechanism fixed on the slide plate (16); a long seat (17) is also fixed on the outside of the rectangular frame, a long rack (18) is fixed on the long seat (17), a transfer motor (19) is also fixed on the slide plate (16), and a gear is fixed at the output end of the transfer motor (19), the gear meshing with the long rack (18).

5. The motor rotor shaft press-fitting device according to claim 1, characterized in that: The pressing mechanism includes a fixed seat (20) fixed on the base frame (1), two opposing upright plates (21) fixed on the fixed seat (20), and a top plate (22) fixed on the upright plate (21); the middle part of the moving mechanism is located on the upper side of the fixed seat (20) and between the two upright plates (21); a servo press (22) is fixed on the upright plate (21), and the output end of the servo press (22) faces downward and is fixed with a pressure column.

6. The motor rotor shaft press-fitting device according to claim 1, characterized in that: An oiling mechanism is also provided on the base frame (1). The oiling mechanism includes a base plate fixed to the base frame (1), a fixed frame fixed on the base plate, and a cylindrical shell (23) fixed on the fixed frame. A turntable (24) is rotatably mounted on the middle part of the cylindrical shell (23) via a bearing. A large gear (25) is fitted under the turntable (24). A rotating motor (26) is fixed on the lower side of the fixed frame. A rotating rod is installed at the output end of the rotating motor (26). The upper end of the rotating rod extends... A small gear (27) is fixed inside the cylindrical shell (23), and the small gear (27) meshes with the large gear (25); a mounting base plate (28) is fixed on the turntable (24), and a mounting seat (29) for placing the motor rotor shaft is fixed on the upper side of the mounting base plate (28); an oiling assembly is also fixed on the mounting plate, and an oiling sponge (30) is provided at the output end of the oiling assembly. The oiling assembly controls the oiling sponge (30) to apply oil to the motor rotor shaft on the mounting seat (29).

7. The motor rotor shaft press-fitting device according to claim 6, characterized in that: The oiling assembly includes a longitudinal electric cylinder (31) fixed on the base plate, a transverse electric cylinder (32) fixed on the output end, a base (33) fixed on the output end of the transverse electric cylinder (32), and an oiling sponge (30) fixed in the extension end of the base (33) by a mounting block.

8. The motor rotor shaft press-fitting device according to claim 6, characterized in that: The mounting base (29) has a triangular prism structure. A fastening cylinder (34) is fixed on the upper side of the mounting base plate (28) and on the outer plane of the mounting base (29). A clamping block (35) for clamping the motor rotor shaft is fixed on the output end of the fastening cylinder (34).

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