A press-fit positioning device for a motor stator

Abstract

The application provides a pressing positioning device for a motor stator, and relates to the technical field of stator processing, which comprises a base and a circumferential positioning device installed on the base; a shell positioning groove for positioning a motor shell is formed in the base; the circumferential positioning device comprises a horizontally movable positioning block, the positioning block is used for cooperating with a vertical positioning groove on the circumference of a stator core and circumferentially positioning the stator core; a positioning opening for accommodating the positioning block to enter and exit is arranged on the side of the motor shell facing the positioning block; the circumferential positioning device further comprises a driving and locking mechanism for driving the positioning block to horizontally move and be locked. The application can improve the pressing precision and consistency of the motor by circumferentially positioning the stator core during the pressing process of the stator core.

Description

Technical Field

[0001] This utility model relates to the field of stator processing technology, and in particular to a press-fitting and positioning device for motor stators. Background Technology

[0002] During motor assembly, the stator core and housing are typically fitted with an interference fit. Therefore, a fixture is needed to press the core into the housing. The busbar welded to the stator core needs to be aligned with the power line terminals, and the coaxiality of the stator core and housing must be ensured. Thus, when pressing the stator core into the housing, not only must the stator core and housing maintain coaxiality, but also circumferential positioning accuracy. However, current stator core pressing processes generally use only simple auxiliary guide fixtures, which lack sufficient control over the circumferential angular position of the stator core, resulting in poor motor accuracy and consistency. Utility Model Content

[0003] The purpose of this utility model is to provide a press-fit positioning device for motor stators, which performs circumferential positioning during the press-fitting process of the stator core, thereby improving the press-fitting accuracy and consistency of the motor. To achieve the above objective, the technical solution adopted by this utility model is as follows: A press-fit positioning device for a motor stator includes a base and a circumferential positioning device mounted on the base. The base has a housing positioning groove for positioning the motor housing. The circumferential positioning device includes a horizontally movable positioning block, which engages with a vertical positioning groove on the circumference of the stator core for circumferential positioning. A positioning opening is provided on the side of the motor housing facing the positioning block to accommodate the entry and exit of the positioning block. The circumferential positioning device also includes a drive locking mechanism for driving the positioning block to move horizontally and locking it.

[0004] Furthermore, the positioning opening is located on the upper part of the motor housing; a mounting base is provided at the bottom of the circumferential positioning device so that the positioning block corresponds to the position of the positioning opening in the vertical direction.

[0005] Furthermore, a slide rail is provided on the mounting base, and the positioning block moves along the slide rail; a stop plate is provided on the side of the slide rail facing the positioning opening.

[0006] Furthermore, the positioning block includes a first slider, a second slider, and a positioning rod; the first slider is U-shaped and is slidably installed in the slide rail, with one end of its opening facing the positioning opening and the other end connected to the drive locking mechanism; the second slider is installed in the opening of the first slider through a spring connecting rod, and the positioning rod is installed at the end of the second slider facing the positioning opening.

[0007] Furthermore, the driving locking mechanism is a crank-slider locking mechanism, whose connecting rod is connected to the first slider. When the first slider moves to the limit distance, the crank-slider locking mechanism completes self-locking.

[0008] Furthermore, a guide post is provided in the middle of the housing positioning groove, which is used to position the inner circumference of the stator core.

[0009] Furthermore, a circular boss is provided around the guide post in the housing positioning groove. The circular boss has a preset height and is used to position the stator core in the axial direction.

[0010] Furthermore, the base is plate-shaped and has locating pin holes and bolt holes for detachable installation on the press machine.

[0011] Furthermore, it also includes a lower pressure head assembly detachably mounted on the press machine, the lower pressure head assembly including a press sleeve, a pressure rod connected to the top of the press sleeve, and a mounting plate connected to the pressure rod.

[0012] Furthermore, the side wall of the press-fit sleeve is provided with an clearance opening, the position and size of which correspond to the positioning block.

[0013] Compared with existing technologies, the advantages of this invention are as follows: By directly engaging the positioning block with the vertical positioning slot on the stator core, the circumferential position of the stator core within the motor housing is ensured through a mechanical insertion method. The driving locking mechanism locks the positioning block in place, eliminating errors associated with traditional manual adjustments. This invention prevents the stator core from rotating or misaligning during the pressing process, ensuring the assembly accuracy and consistency of the motor stator, thereby improving motor performance. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the press-fitting and positioning device for the motor stator in an embodiment of this utility model; Figure 2 This is a schematic diagram illustrating the use of the press-fit positioning device for the motor stator in this embodiment of the present invention; Figure 3 This is a schematic diagram of the circumferential positioning device in an embodiment of the present invention; Figure 4 This is a side view of the driving locking mechanism in an embodiment of the present invention; Figure 5 This is a schematic diagram illustrating the use of the lower pressure head assembly in an embodiment of this utility model.

[0015] Wherein, 1: base; 2: circumferential positioning device; 3: motor housing; 4: positioning block; 5: stator core; 6: drive locking mechanism; 7: lower pressure head assembly; 11: housing positioning groove; 21: mounting base; 22: slide rail; 23: stop plate; 31: positioning opening; 41: first slider; 42: second slider; 43: positioning rod; 71: press sleeve; 72: pressure rod; 73: mounting plate; 74: clearance opening. Detailed Implementation

[0016] It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly. The connection can be a direct connection or an indirect connection.

[0019] Furthermore, in this utility model, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0020] like Figure 1 and Figure 2 As shown, one embodiment of this utility model provides a press-fitting and positioning device for a motor stator. Figure 1 This is a schematic diagram of the press-fitting and positioning device for the motor stator in this embodiment. Figure 2 This is a schematic diagram illustrating the use of the press-fit positioning device for the motor stator in this embodiment. The press-fit positioning device for the motor stator in this embodiment includes a base 1 and a circumferential positioning device 2 mounted on the base 1. The base 1 has a housing positioning groove 11 for positioning the motor housing 3. The circumferential positioning device 2 includes a horizontally movable positioning block 4, which engages with a vertical positioning groove on the circumference of the stator core 5 for circumferential positioning. A positioning opening 31 is provided on the side of the motor housing 3 facing the positioning block 4 to accommodate the entry and exit of the positioning block 4. The circumferential positioning device 2 also includes a drive locking mechanism 6 for driving the positioning block 4 to move horizontally and locking it in place.

[0021] The base 1 serves as the fundamental support structure for the entire device. It can be made of metal and has sufficient volume to provide significant strength and stability. This ensures the device can withstand the high pressure during pressing without shifting or vibrating, guaranteeing positioning accuracy and operational safety. The housing positioning groove 11 is manufactured according to the outer contour of the motor housing 3, ensuring that the motor housing 3 is uniquely and accurately positioned on the device, providing a stable reference for the subsequent pressing of the stator core 5. Operators can quickly and accurately place the housing into the positioning groove without repeated adjustments, greatly improving production efficiency. The circumferential positioning device 2 uses positioning blocks 4 to circumferentially position the stator core 5, precisely controlling the installation angle of the stator core 5 and ensuring a precise fit between the stator windings and the motor housing 3. The drive locking mechanism 6 can be any mechanical structure that pushes the positioning block to move horizontally, and can make the end of the positioning block 4 cooperate with the positioning groove on the circumference of the stator core 5 for positioning. After positioning is completed, it can also be locked to prevent shaking during the pressing process. After pressing is completed, the positioning block 4 can be retracted without affecting the subsequent removal of the motor.

[0022] This embodiment simultaneously ensures the axial position and circumferential angle relationship between the stator core 5 and the motor housing 3, ensuring the symmetry of the motor magnetic circuit and preventing the stator core 5 from rotating or misaligning during the press-fitting process. This guarantees the assembly accuracy and consistency of the motor stator, thereby improving the performance of the motor.

[0023] like Figure 2 As shown, the positioning opening 31 is located on the upper part of the motor housing 3; the bottom of the circumferential positioning device 2 is provided with a mounting base 21, so that the positioning block 4 corresponds to the position of the positioning opening 31 in the vertical direction.

[0024] The positioning opening 31 is located on the upper part of the side wall of the motor housing 3, that is, the positioning opening 31 is located in the upper part of the motor housing 3 in the vertical direction, near the entrance of the stator core 5 press-fitting, which can solve the initial positioning problem of the stator core 5. The mounting base 21 can adjust the height of the positioning block 4 to accommodate different motor housings 3, which can enhance the versatility of the device and reduce the cost and cycle of new product development devices.

[0025] like Figure 3 The diagram shown is a schematic diagram of the circumferential positioning device in this embodiment. In this embodiment, a slide rail 22 is provided on the mounting base 21, and the positioning block 4 moves along the slide rail 22. A stop plate 23 is provided on the side of the slide rail 22 facing the positioning opening 31.

[0026] By restricting the movement path of the positioning block 4 using the slide rail 22, the positional accuracy of the positioning block 4 can be improved, thereby enhancing the overall positioning accuracy. The stop plate 23 can be integrally formed with the slide rail 22 or detachably installed at one end of the slide rail 22 to limit the extreme positions of the positioning block 4, preventing it from falling or damaging the stator core 5. This embodiment further improves the accuracy and reliability of the positioning block 4, making it suitable for automated production scenarios with stringent requirements for stator assembly angles.

[0027] like Figure 3 As shown, the positioning block 4 includes a first slider 41, a second slider 42, and a positioning rod 43; the first slider 41 is U-shaped and is slidably installed in the slide rail 22, with one end of its opening facing the positioning opening 31 and the other end connected to the drive locking mechanism 6; the second slider 42 is installed in the opening of the first slider 41 through a spring connecting rod, and the positioning rod 43 is installed at the end of the second slider 42 facing the positioning opening 31.

[0028] In this embodiment, the positioning block 4 has multiple components. The first slider 41 receives the thrust from the driving locking mechanism 6 and moves within the slide rail 22. The spring connecting rod is a combination of a connecting rod and a thrust spring, installed between the first slider 41 and the second slider 42. It allows the second slider 42 to move relative to the first slider 41, enabling the first slider 41 to transmit the thrust to the second slider 42 via the spring connecting rod, thus improving the overall flexibility of the structure. The positioning rod 43 is installed at the end of the second slider 42, receives the thrust provided by the spring connecting rod, moves towards the stator core 5, and embeds itself in the vertical positioning groove on the circumference of the stator core 5, thereby positioning the stator core 5. This embodiment can reduce the impact when the positioning rod 43 enters the positioning groove of the stator core 5, and has a certain degree of fault tolerance and correction capability. It can effectively eliminate the fit gap between the positioning rod 43 and the positioning groove wall of the stator core 5, keeping them in close contact, reducing circumferential movement during press-fitting, and further improving the positioning accuracy and stability by absorbing the impact force through the spring.

[0029] like Figure 4 The image shown is a side view of the driving locking mechanism in this embodiment. In this embodiment, the driving locking mechanism 6 is a crank-slider locking mechanism, and its connecting rod is connected to the first slider 41. When the first slider 41 moves to the limit distance, the crank-slider locking mechanism completes self-locking.

[0030] The crank-slider locking mechanism can be designed according to requirements, including a crank, connecting rod, and slider, which is the first slider 41. This mechanism utilizes a "dead point" position to achieve self-locking. This embodiment achieves self-locking through a mechanical structure, which has extremely high reliability and can prevent the risk of locking failure due to pressure fluctuations. The crank-slider locking mechanism cooperates with the spring connecting rod of the positioning block 4. During use, the operator only needs to apply a small force to drive the positioning block 4 to complete the self-locking, which can reduce labor intensity.

[0031] In this embodiment, a guide post is provided in the middle of the housing positioning groove 11. The guide post is used to position the inner circumference of the stator core 5.

[0032] The guide column can be replaced according to the motor model and size. During the pressing process, the guide column supports and guides the stator core 5, preventing the stator core 5 from deviating during launch, and enabling the stator core 5 to enter the housing smoothly and vertically, thereby improving the safety and reliability of the pressing process.

[0033] In this embodiment, a circular boss is provided around the guide post in the housing positioning groove 11. The circular boss has a preset height and is used to position the stator core 5 in the axial direction.

[0034] The circular boss can be machined together with the positioning groove of the base 1. During the press-fitting process, the stator core 5 moves downward and contacts the circular boss to complete the axial positioning, which can maintain the relative position of the motor housing 3 in the axial direction and ensure the stability of the press-fitting depth, thus providing a key process guarantee for producing high-performance and highly consistent motor products.

[0035] In this embodiment, the base 1 is plate-shaped and has positioning pin holes and bolt holes for detachable installation on the press machine.

[0036] The plate structure provides good stability and support, ensuring that the entire device will not tilt or deform under stress. The detachable base 1 can be adapted to the pressing work of different motors, thus improving the application range of the device.

[0037] like Figure 5 The diagram shown is a schematic diagram of the use of the lower pressure head assembly in this embodiment. In this embodiment, the press-fitting and positioning device for the motor stator also includes a lower pressure head assembly 7 that is detachably mounted on the press-fitting machine. The lower pressure head assembly 7 includes a press-fitting sleeve 71, a pressure rod 72 connected to the top of the press-fitting sleeve 71, and a mounting plate 73 connected to the pressure rod 72.

[0038] The pressing head assembly 7 can be configured according to the motor model used for pressing, and can be used as a set with the base 1. It can also be precisely matched with the guide column to improve the pressing quality.

[0039] In this embodiment, an clearance opening 74 is provided on the side wall of the press sleeve 71, and the position and size of the clearance opening 74 correspond to the positioning block 4.

[0040] The size of the clearance opening 74 can be determined based on the positioning rod 43, so that the clearance opening 74 can avoid the positioning rod 43 during the pressing of the pressing sleeve 71, and the positioning rod 43 can always remain in an extended and locked state during the entire pressing process, thereby improving the angular accuracy and stability of the stator core 5 during the pressing process.

[0041] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural or procedural transformations made based on the content of the present utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present utility model.

Claims

1. A press-fitting and positioning device for a motor stator, characterized in that, The device includes a base (1) and a circumferential positioning device (2) mounted on the base (1); the base (1) has a housing positioning groove (11) for positioning the motor housing (3); the circumferential positioning device (2) includes a horizontally movable positioning block (4), which is used to cooperate with the vertical positioning groove on the circumference of the stator core (5) for circumferential positioning; the motor housing (3) has a positioning opening (31) on the side facing the positioning block (4) to accommodate the entry and exit of the positioning block (4); the circumferential positioning device (2) also includes a drive locking mechanism (6) for driving the positioning block (4) to move horizontally and locking it.

2. The press-fitting and positioning device for the motor stator according to claim 1, characterized in that, The positioning opening (31) is located on the upper part of the motor housing (3); the bottom of the circumferential positioning device (2) is provided with a mounting base (21) so that the positioning block (4) corresponds to the position of the positioning opening (31) in the vertical direction.

3. The press-fitting and positioning device for the motor stator according to claim 2, characterized in that, The mounting base (21) is provided with a slide rail (22), and the positioning block (4) moves along the slide rail (22); a stop plate (23) is provided on the side of the slide rail (22) facing the positioning opening (31).

4. The press-fitting and positioning device for the motor stator according to claim 3, characterized in that, The positioning block (4) includes a first slider (41), a second slider (42), and a positioning rod (43); the first slider (41) is U-shaped and is slidably installed in the slide rail (22), with one end of its opening facing the positioning opening (31) and the other end connected to the drive locking mechanism (6); the second slider (42) is installed in the opening of the first slider (41) through a spring connecting rod, and the positioning rod (43) is installed at the end of the second slider (42) facing the positioning opening (31).

5. The press-fitting and positioning device for the motor stator according to claim 4, characterized in that, The drive locking mechanism (6) is a crank-slider locking mechanism, whose connecting rod is connected to the first slider (41). When the first slider (41) moves to the limit distance, the crank-slider locking mechanism completes self-locking.

6. The press-fitting and positioning device for a motor stator according to claim 1, characterized in that, A guide post is provided in the middle of the housing positioning groove (11), and the guide post is used to position the inner circumference of the stator core (5).

7. The press-fitting and positioning device for a motor stator according to claim 6, characterized in that, A circular boss is provided around the guide post in the housing positioning groove (11). The circular boss has a preset height and is used to position the stator core (5) in the axial direction.

8. The press-fitting and positioning device for a motor stator according to claim 1, characterized in that, The base (1) is plate-shaped and has positioning pin holes and bolt holes for detachable installation on the press machine.

9. The press-fitting and positioning device for a motor stator according to claim 8, characterized in that, It also includes a lower pressure head assembly (7) detachably mounted on the press machine, the lower pressure head assembly (7) including a press sleeve (71), a pressure rod (72) connected to the top of the press sleeve (71), and a mounting plate (73) connected to the pressure rod (72).

10. The press-fitting and positioning device for a motor stator according to claim 9, characterized in that, The side wall of the press sleeve (71) is provided with an avoidance opening (74), the position and size of which correspond to the positioning block (4).

Images