A positioning tool for stator mounting

Abstract

The utility model provides a kind of positioning tool for stator installation, it is related to motor manufacturing tool technical field, including: the base for fixing motor casing.Set on the positioning column of base, positioning column is used to the radial positioning of the inner circle of stator.Positioning block elastically resetly set in the side of positioning column, positioning block includes vertical setting's protruding tooth;Positioning block is retracted to the axial direction of positioning column when being pressed, allow stator sleeve into positioning column;When positioning block pops out, protruding tooth cooperates with the notch of stator inner circle, the circumferential angle positioning of stator.The positioning tool for stator installation provided by the utility model can realize the integrated accurate positioning of stator radial and circumferential, effectively solve the problems such as deviation, shell damage and terminal misalignment etc.

Description

Technical Field

[0001] This utility model relates to the field of tooling technology for motor manufacturing, and in particular to a positioning tooling for stator installation. Background Technology

[0002] In existing technologies, stator assembly mostly employs press-fitting, with a few using heat-fitting. Press-fitting requires pressing the stator into the housing with an interference fit, demanding high precision in tooling. If the tooling dimensions are not up to standard, the stator can easily shift during press-fitting, damaging the housing and affecting motor performance, resulting in economic losses. Furthermore, some tooling lacks positioning functionality. When using hook-type terminals, if the stator installation angle is off, causing misalignment between the busbar power supply end and the terminal pin, the terminals will be difficult to install. This paper addresses the aforementioned problems of poor press-fitting performance and inaccurate positioning after installation. Utility Model Content

[0003] To solve the above-mentioned technical problems, this utility model proposes a positioning fixture for stator installation to improve the assembly quality and positioning reliability of the motor. To achieve the above objectives, this utility model adopts the following technical solution: A positioning fixture for stator mounting, comprising: The base is used to fix the motor housing.

[0004] The positioning pin, set on the base, is used for radial positioning of the inner circle of the stator.

[0005] The positioning block is elastically resettable and is disposed on the side of the positioning post, including vertically arranged protruding teeth; when the positioning block is pressed, it retracts towards the axis of the positioning post, allowing the stator to be fitted into the positioning post; when the positioning block pops out, the protruding teeth cooperate with the groove of the inner circle of the stator to position the stator in a circumferential angle.

[0006] Furthermore, the positioning block is elongated, with an arc surface on the side opposite to the axis of the positioning post, and protruding teeth are located in the middle of the arc surface.

[0007] Furthermore, the upper end of the positioning column is provided with a positioning surface parallel to its axis, and a guide groove for installing the positioning block is provided on the positioning surface, so that the positioning block can move perpendicular to the positioning surface.

[0008] Furthermore, it also includes a thrust spring installed between the guide groove and the positioning block, which acts on the positioning block to provide it with an elastic restoring force that pops it outward.

[0009] Furthermore, the positioning block is provided with two countersunk holes for installing plug screws, and the guide groove is provided with corresponding screw holes with a preset depth to limit the displacement distance of the positioning block.

[0010] Furthermore, the positioning post has a spring hole for accommodating the thrust spring between the two screw holes, and the positioning block has a spring position for receiving the thrust spring at the corresponding position.

[0011] Furthermore, when the motor housing is mounted on the base, the top of the positioning block is higher than the top surface of the motor housing.

[0012] Furthermore, when the positioning block is in the pop-out state, the distance between the convex tooth and the axis of the positioning post is greater than the diameter of the positioning post.

[0013] Furthermore, the base is provided with a positioning groove for accommodating the motor housing, and the side of the positioning groove is used to position the motor housing; the base is provided with mounting holes for fixing the base.

[0014] Furthermore, the base is provided with a disc-shaped protrusion, and the bottom of the positioning post is provided with a corresponding groove, with the disc-shaped protrusion and the groove being interference fit.

[0015] Compared with existing technologies, the advantages of this invention are as follows: By incorporating a resiliently resettable positioning block that works in conjunction with the positioning column and base, this invention achieves integrated and precise positioning of the stator in both the radial and circumferential directions, effectively solving problems such as misalignment, housing damage, and terminal misalignment that easily occur during traditional press-fitting processes. In use, after compressing the positioning block, the stator is fitted onto the positioning shaft. Rotating the stator causes the protruding teeth of the positioning block to engage with the grooves in the inner ring of the stator, completing circumferential positioning. Then, pressure is applied to the stator to press it into the motor housing. The positioning fixture for stator installation provided by this invention significantly improves installation efficiency and positioning accuracy, and its simple and reliable structure reduces manufacturing and maintenance costs. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the positioning fixture used for stator installation in an embodiment of this utility model; Figure 2 This is a schematic diagram of the installation of the stator and positioning post in an embodiment of this utility model; Figure 3 This is a schematic diagram of the positioning block in an embodiment of the present invention; Figure 4 This is a schematic diagram of the positioning column in an embodiment of the present invention; Figure 5 This is a schematic diagram of the base structure in an embodiment of this utility model.

[0017] Among them, 1: base; 2: positioning post; 3: stator; 4: positioning block; 5: thrust spring; 6: plug screw; 11: positioning groove; 12: mounting hole; 13: disc-shaped protrusion; 21: positioning surface; 22: guide groove; 23: screw hole; 24: spring hole; 25: groove; 31: slot; 41: protruding tooth; 42: arc surface; 43: countersunk hole. Detailed Implementation

[0018] 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.

[0019] 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.

[0020] 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.

[0021] Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0022] like Figure 1 The diagram shown is a structural schematic of a positioning fixture for stator installation in an embodiment of this utility model. In this embodiment, the positioning fixture for stator installation includes: Base 1 is used to fix the motor housing.

[0023] Positioning pin 2 is set on base 1 and is used for radial positioning of the inner circle of stator 3.

[0024] The positioning block 4 is elastically resettable and disposed on the side of the positioning post 2, including vertically arranged protruding teeth 41; when pressed, the positioning block 4 retracts towards the axis of the positioning post 2, allowing the stator 3 to be fitted into the positioning post 2; when the positioning block 4 pops out, the protruding teeth 41 cooperate with the groove 31 on the inner circle of the stator 3 to position the stator 3 in a circumferential angle, such as... Figure 2 As shown, Figure 2This is a schematic diagram of the installation of the stator and positioning post in this embodiment.

[0025] The positioning block 4 features an elastic reset design using a spring structure or elastic material. This design allows the stator 3 to be quickly inserted into the positioning post 2. The retraction of the positioning block 4 can be controlled manually or by setting a control structure. Alternatively, a chamfered structure can be provided on the upper end of the positioning block 4 to guide the stator 3 into place. The operator only needs to press the stator 3 in, and the positioning block 4 automatically retracts and pops out, simplifying the installation steps and reducing operation time. The positioning post 2 provides radial positioning of the inner circle of the stator 3, ensuring the concentricity of the stator 3 and the motor housing, reducing radial deviation, and guiding the stator 3, improving its stability during the press-fitting process. The positioning block 4, positioning post 2, and base 1 work together to achieve integrated and precise positioning of the stator 3 in both the radial and circumferential directions, effectively solving problems such as misalignment, housing damage, and terminal misalignment that easily occur during traditional press-fitting processes. In use, after compressing the positioning block 4, the stator 3 is fitted onto the positioning shaft. Rotating the stator 3 causes the protruding teeth 41 of the positioning block 4 to engage with the groove 31 of the inner ring of the stator 3, completing circumferential positioning. Then, pressure is applied to the stator 3 to press it into the motor housing. The positioning fixture for stator 3 installation provided by this invention significantly improves installation efficiency and positioning accuracy, and its simple and reliable structure reduces manufacturing and maintenance costs.

[0026] like Figure 3 As shown, this is a schematic diagram of the positioning block in this embodiment. In this embodiment, the positioning block 4 is long and narrow, and the side facing away from the axis of the positioning column 2 is an arc surface 42. The protruding teeth 41 are set in the middle of the arc surface 42.

[0027] During the press-fitting process, the arc surface 42 of the positioning block 4 may contact the inner circle of the stator 3. The arc surface 42 provides a smooth transition, which can more smoothly convert the downward pressure into a radial component force that causes the positioning block 4 to retract. This greatly reduces the friction, impact, and jamming between the stator 3 and the positioning block 4 during the pressing process, making the operation more effortless and smooth, while reducing the wear on the inner surface of the stator 3 and the positioning block 4 itself. The protruding teeth 41 are vertical strips. When the positioning block 4 pops out and the protruding teeth 41 on the arc surface 42 are embedded in the slot 31 of the stator 3, the circumferential torque on the protruding teeth 41 is evenly transmitted along the positioning block 4 to the elastic reset element and the connecting parts. The centrally positioned protruding teeth 41 can avoid the positioning block 4 from warping, twisting, or jamming that may occur due to uneven force, ensuring that the protruding teeth 41 can always accurately stay in the slot 31, achieving accurate and reliable circumferential angular positioning.

[0028] like Figure 4As shown, this is a schematic diagram of the positioning column in this embodiment. In this embodiment, the upper end of the positioning column 2 is provided with a positioning surface 21 parallel to its axis. The positioning surface 21 is provided with a guide groove 22 for installing the positioning block 4. The positioning block 4 can move perpendicular to the positioning surface 21.

[0029] The positioning surface 21 is a flat, vertical plane machined on the upper sidewall of the positioning post 2. This plane is parallel to the axis of the positioning post 2, ensuring its verticality and facing the inner circumference of the stator 3, providing a precise reference plane for the subsequent installation of the positioning block 4. A guide groove 22 is machined on the positioning surface 21, accommodating the positioning block 4 and restricting its movement to a direction perpendicular to the positioning surface 21. When the positioning block 4 is compressed, it can sink into the guide groove 22. The guide groove 22 improves the movement accuracy and positional stability of the positioning block 4, ensuring that the protrusions 41 on the positioning block 4 can engage with the slots 31 in the inner circle of the stator 3, improving repeatability. Furthermore, when the stator 3 rotates relative to the positioning post 2, it also supports the positioning block 4, preventing it from deflecting due to friction and reducing maintenance costs.

[0030] like Figure 3 The positioning fixture for stator installation provided in this embodiment also includes a thrust spring 5 installed between the guide groove 22 and the positioning block 4. The thrust spring 5 acts on the positioning block 4 to provide it with an elastic restoring force that pops outward.

[0031] The built-in thrust spring 5 can be combined with the guide groove 22 to achieve efficient, reliable, accurate and stable positioning function.

[0032] In this embodiment, the positioning block 4 is provided with two countersunk holes 43 for installing the plug screws 6, and the guide groove 22 is provided with corresponding screw holes 23. The screw holes 23 are provided with a preset depth to limit the displacement distance of the positioning block 4.

[0033] In this embodiment, the threaded portion of the bottom of the screw 6 is installed in the screw hole 23, and the middle part is clearance-fitted with the positioning block 4, allowing the positioning block 4 to move perpendicularly to the positioning surface 21 under the guidance of the screw 6, while preventing it from falling out of the guide groove 22. The countersunk hole 43 can accommodate the head of the screw 6, preventing the screw 6 from contacting the stator 3. This embodiment limits the maximum retraction stroke of the positioning block 4 by setting the depth of the screw hole 23, which can precisely control the maximum compression of the elastic element.

[0034] like Figure 4 As shown, in this embodiment, the positioning post 2 is provided with a spring hole 24 for accommodating the thrust spring 5 between the two screw holes 23, and the positioning block 4 is provided with a spring position for receiving the thrust spring 5 at the corresponding position.

[0035] In this embodiment, the thrust spring 5 is precisely positioned between the spring hole 24 of the positioning post 2 and the spring position of the positioning block 4. When the positioning block 4 is pressed inward by the stator 3, the spring is stably compressed within this enclosed and aligned space. After the pressure is released, the spring can steadily push the positioning block 4 back to its working position along this preset, straight path. This embodiment creates an ideal working environment for the spring, solving common problems in reciprocating motion mechanisms such as spring instability, jamming, and wear.

[0036] In this embodiment, when the motor housing is mounted on the base 1, the top of the positioning block 4 is higher than the top surface of the motor housing.

[0037] The positioning block 4 is positioned high enough to initially contact the motor housing and stator 3. The stator 3 is fitted onto the upper end of the positioning post 2, with its inner circle contacting the positioning block 4. Rotating the stator 3 allows the protruding teeth 41 on the positioning block 4 to engage with the groove 31 on the inner circle of the stator 3, completing the circumferential positioning of the stator 3. Then, pressure is applied to the stator 3 to complete the press-fitting. Furthermore, the positioning block 4 is positioned high enough to ensure that the inner wall of the stator 3 remains in contact with the positioning post 2 throughout the entire process from the initial fitting of the stator 3 onto the positioning post 2 to its final installation, providing continuous and stable radial guidance and preventing the stator 3 from tilting.

[0038] In this embodiment, when the positioning block 4 is in the pop-out state, the distance between the convex tooth 41 and the axis of the positioning post 2 is greater than the diameter of the positioning post 2.

[0039] In this embodiment, by setting the dimensional relationship, it is ensured that the protruding tooth 41 can be effectively embedded into the slot 31 of the inner circle of the stator 3, reducing the problem of the stator 3 being disengaged from circumferential positioning and causing angular error that may be caused by slight vibration or rotation.

[0040] like Figure 5 The diagram shown is a schematic diagram of the base structure in this embodiment. In this embodiment, the base 1 is provided with a positioning groove 11 for accommodating the motor housing. The side of the positioning groove 11 is used to position the motor housing. The base 1 is provided with mounting holes 12 for fixing the base 1.

[0041] The positioning groove 11 positions the motor housing via its side and bottom surfaces, making the installation of the motor housing simple and quick. The operator can easily place the housing in the correct position, just like "placing it in a mold," without repeated adjustments to the center, thus reducing auxiliary time. The base 1 is fixed to the press-fitting machine through the mounting holes 12, allowing for easy replacement of different models of base 1 to accommodate different motors.

[0042] In this embodiment, a disc-shaped protrusion 13 is provided on the base 1, and a corresponding groove 25 is provided at the bottom of the positioning post 2. The disc-shaped protrusion 13 and the groove 25 are interference fit.

[0043] The interference fit eliminates looseness and positional deviation between the positioning pin 2 and the base 1, ensuring the concentricity of the stator 3 and the motor housing. Furthermore, the frictional force of the interference fit reliably resists the torque that restricts the rotation of the stator 3, preventing slight rotation of the positioning pin 2 on the base 1 and thus guaranteeing reliable circumferential positioning. The interference fit also facilitates adjusting the assembly angle between the positioning pin 2 and the base 1 to control the positioning angle between the stator 3 and the housing. This embodiment eliminates the need for additional fasteners such as bolts and pins, resulting in a very flat and clean surface on the upper surface of the base 1 and the bottom area of ​​the positioning pin 2. This avoids potential interference from fasteners during motor housing installation or other operations, and simplifies parts management and assembly processes.

[0044] 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 positioning fixture for stator mounting, characterized in that, include: Base (1) is used to fix the motor housing; Positioning post (2) is set on the base (1) and is used to radially position the inner circle of the stator (3); The positioning block (4) is elastically resettable and is disposed on the side of the positioning post (2), including vertically arranged protruding teeth (41); when the positioning block (4) is pressed, it retracts towards the axis of the positioning post (2), allowing the stator (3) to be fitted into the positioning post (2); when the positioning block (4) pops out, the protruding teeth (41) cooperate with the groove (31) of the inner circle of the stator (3) to position the circumferential angle of the stator (3).

2. The positioning fixture for stator installation according to claim 1, characterized in that, The positioning block (4) is long and narrow, and the side facing away from the axis of the positioning column (2) is an arc surface (42), and the protruding tooth (41) is located in the middle of the arc surface (42).

3. The positioning fixture for stator installation according to claim 2, characterized in that, The upper end of the positioning column (2) is provided with a positioning surface (21) parallel to its axis. The positioning surface (21) is provided with a guide groove (22) for installing the positioning block (4). The positioning block (4) can move perpendicular to the positioning surface (21).

4. The positioning fixture for stator installation according to claim 3, characterized in that, It also includes a thrust spring (5) installed between the guide groove (22) and the positioning block (4), the thrust spring (5) acting on the positioning block (4) to provide it with an elastic restoring force that pops outward.

5. The positioning fixture for stator mounting according to claim 4, characterized in that, The positioning block (4) is provided with two countersunk holes (43) for installing screws (6), and the guide groove (22) is provided with corresponding screw holes (23). The screw holes (23) are provided with a preset depth to limit the displacement distance of the positioning block (4).

6. The positioning fixture for stator mounting according to claim 5, characterized in that, The positioning post (2) has a spring hole (24) for accommodating the thrust spring (5) between the two screw holes (23), and the positioning block (4) has a spring position for receiving the thrust spring (5) at the corresponding position.

7. The positioning fixture for stator mounting according to claim 6, characterized in that, When the motor housing is installed on the base (1), the top height of the positioning block (4) is higher than the height of the upper surface of the motor housing.

8. The positioning fixture for stator mounting according to claim 1, characterized in that, When the positioning block (4) is in the pop-out state, the distance between the convex tooth (41) and the axis of the positioning post (2) is greater than the diameter of the positioning post (2).

9. The positioning fixture for stator mounting according to claim 1, characterized in that, The base (1) is provided with a positioning groove (11) for accommodating the motor housing, and the side of the positioning groove (11) is used to position the motor housing; the base (1) is provided with mounting holes (12) for fixing the base (1).

10. The positioning fixture for stator mounting according to claim 1, characterized in that, The base (1) is provided with a disc-shaped protrusion (13), and the bottom of the positioning post (2) is provided with a corresponding groove (25). The disc-shaped protrusion (13) and the groove (25) are interference fit.

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