A motor assembly

Abstract

The utility model provides a kind of motor combination structure, the structure includes motor, upper copper medium pipe and lower copper medium pipe, lower copper medium pipe is integrally formed with heat dissipation fan outer frame;Upper copper medium pipe top is equipped with bayonet, bottom is equipped with outer thread, lower copper medium pipe top is equipped with adaptive internal thread and outside plastic step is equipped with plastic positioning column, motor top is equipped with plastic chamfer, inside is equipped with the positioning groove compatible with plastic positioning column.Assemble, motor is fixed transversely by the tight fit of positioning groove and plastic positioning column, upper copper medium pipe is connected with lower copper medium pipe by thread, after rotating in place, bayonet is extruded along plastic chamfer and is clamped by springback, forming the stable connection of motor and copper medium pipe.The design realizes that motor and copper medium pipe metal contact directly, greatly improves heat dissipation efficiency, simultaneously, through structure closed loop restriction enhancement anti-vibration, anti-impact ability, canceling dispensing procedure, without colloid solidification waiting, simplify assembly process, reduce labor cost, effectively prolong the service life of motor and operation reliability.

Description

Technical Field

[0001] This utility model relates to the field of cooling fan technology, and in particular to a motor assembly structure. Background Technology

[0002] Currently, the copper tube of a cooling fan and the motor are usually fixed by adhesive application. This means that glue is applied to the joint surface between the motor and the copper tube, and the two are fixed by the adhesive force of the glue. This method has significant technical defects.

[0003] The efficiency of a heat dissipation system depends on the weakest link in heat conduction. The thermal conductivity of the adhesive layer formed by dispensing is much lower than that of metal, preventing the heat generated by the motor from being quickly conducted to the copper tube. This leads to an increase in the motor's temperature, which in the long term affects the motor's performance stability, lifespan, and operational reliability, creating a significant heat dissipation bottleneck. Simultaneously, the ambient temperature around the motor typically reaches 60-80°C when the cooling fan is operating, and the fan's start-stop process creates a temperature cycle. Adhesive exposed to this environment for extended periods is prone to thermal aging, manifesting as brittleness, cracking, and powdering. This not only further reduces thermal conductivity but may also lead to loss of structural fixation, causing the motor to detach from the copper tube. The fan experiences continuous vibration during operation. The adhesive-fixed joint relies solely on the adhesive's adhesion to resist the shear forces generated by vibration. Compared to mechanical bonding or welding, its mechanical strength is lower, posing a significant risk of debonding under strong vibration or accidental impact. Furthermore, the dispensing process between the copper tube and the motor requires precise manual control of the amount and location of adhesive, and the adhesive must be allowed to cure after application, which is time-consuming and labor-intensive, significantly increasing the assembly time and labor costs of the cooling fan. Utility Model Content

[0004] This utility model provides a motor assembly structure to overcome the deficiencies in the prior art.

[0005] This utility model provides a motor assembly structure, including a motor, an upper copper tube, and a lower copper tube. The upper copper tube has a snap-fit ​​at the top and an external thread at the bottom. The lower copper tube has an internal thread at the top and a plastic step integrally formed with the outer frame on its outer side. A plastic positioning post is provided at the top of the plastic step. The top plastic part of the motor has a plastic chamfer and an internal positioning groove adapted to the plastic positioning post. The upper copper tube is spirally connected to the lower copper tube through the external thread and the internal thread. When rotated to the correct position, the snap-fit ​​of the upper copper tube is squeezed along the plastic chamfer and then snapped in place by the plastic chamfer. The motor is tightly fitted with the plastic positioning post through the positioning groove, forming a fixed connection between the motor and the copper tube.

[0006] According to the motor assembly structure provided by this utility model, the bayonet of the upper copper tube is a continuous annular bayonet, which is arranged circumferentially along the inner side of the top of the upper copper tube.

[0007] According to the motor assembly structure provided by this utility model, the lower copper tube and the outer frame are formed by an integral injection molding process, and the plastic positioning posts are evenly distributed around the top of the plastic steps.

[0008] According to the motor assembly structure provided by this utility model, the number of positioning slots of the motor is the same as the number of plastic positioning posts, and the width of the positioning slot is interference-fitted with the diameter of the plastic positioning post.

[0009] According to the motor assembly structure provided by this utility model, the inclination angle of the plastic chamfer is 30°-60°, and the chamfer surface is provided with a smooth transition surface.

[0010] According to the motor assembly structure provided by this utility model, the external thread of the upper copper tube and the internal thread of the lower copper tube are fine threads, and the thread direction is right-hand.

[0011] This utility model provides a motor assembly structure that, through an innovative design of segmented copper tubes, spiral connections, and inverted snap-fit, eliminates the need for adhesive bonding compared to existing dispensing fixation technology. Instead, it employs a mechanical structure for instant fixation, eliminating the need to wait for the adhesive to cure. The assembly process can be completed in one step, significantly shortening the overall assembly cycle of the cooling fan and reducing production waiting costs. Through the combination of the spiral structure and the inverted snap-fit, the motor and copper tube form a large-area, tight metal-to-metal direct contact. This means that the motor stator silicon steel sheets and the copper tube directly conduct heat, with the inter-metal thermal resistance being much lower than that of the adhesive layer. The heat generated by the motor can be quickly conducted to the copper tube, completely solving the heat dissipation bottleneck problem in existing technologies, effectively reducing the motor's operating temperature and extending its lifespan.

[0012] In the horizontal direction, the motor is tightly fitted with the plastic positioning post of the lower copper tube via an internal positioning groove, directly restricting the motor's left-right swaying. In the axial direction, the top metal surface of the upper copper tube is tightly fitted with the top of the motor, while the clamp of the upper copper tube engages with the chamfered plastic of the motor. Combined with the spiral structure's anti-rotation and anti-vertical movement closed-loop constraint, this prevents the motor from swaying up and down. The overall vibration and impact resistance far exceeds that of adhesive fixing, eliminating the risk of loosening due to adhesive aging. Furthermore, this design eliminates the adhesive dispensing process, requiring no manual application of adhesive or monitoring of the curing process. The assembly steps only require three steps: the motor tightly fitting the positioning post, the spiral connection of the upper copper tube, and the clamp engagement. The operation is simple and easily standardized, reducing labor input and lowering labor costs and operational errors in the production process. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0014] Figure 1 This is a cross-sectional structural schematic diagram of the cooling fan motor assembly structure provided in this embodiment of the utility model;

[0015] Figure 2 This is a schematic diagram of the plastic step structure provided in this embodiment of the utility model;

[0016] Figure 3 This is a schematic diagram of the upper copper tube provided in an embodiment of the present invention.

[0017] Reference numerals: 1. Motor; 2. Upper copper tube; 3. Lower copper tube; 4. Plastic step; 21. Bayonet; 22. External thread; 41. Plastic chamfer. Detailed Implementation

[0018] 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 embodiments of this utility model, not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can typically be arranged and designed in various different configurations.

[0019] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0020] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0021] In the description of the embodiments of this utility model, it should be noted that the terms "inner", "outer", "upper", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is usually placed when in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element 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.

[0022] This application provides a motor assembly structure, including a motor 1, an upper copper tube 2, and a lower copper tube 3. The upper copper tube 2 has a snap-fit ​​21 at the top and an external thread 22 at the bottom. The lower copper tube 3 has an internal thread at the top and a plastic step 4 integrally formed with the outer frame on the outside. The plastic step 4 has a plastic positioning post at the top. The top plastic part of the motor 1 has a plastic chamfer 41 and a positioning groove adapted to the plastic positioning post inside. The upper copper tube 2 is spirally connected to the internal thread of the lower copper tube 3 through the external thread 22. When rotated to the position, the snap-fit ​​21 of the upper copper tube 2 is squeezed along the plastic chamfer 41 and then snapped in place by the plastic chamfer 41. The motor 1 is tightly fitted with the plastic positioning post through the positioning groove, forming a fixed connection between the motor 1 and the copper tube.

[0023] The upper copper tube 2 has a continuous annular bayonet 21, which is set along the inner circumference of the top of the upper copper tube 2. The lower copper tube 3 and the outer frame are formed by integral injection molding. The plastic positioning posts are evenly distributed along the top circumference of the plastic step 4. The number of positioning slots of the motor 1 is the same as the number of plastic positioning posts, and the width of the positioning slot is interference-fitted with the diameter of the plastic positioning post. The inclination angle of the plastic chamfer 41 is 30°-60°, and the chamfer surface has a smooth transition surface. The external thread 22 of the upper copper tube 2 and the internal thread of the lower copper tube 3 are fine threads, and the thread direction is right-handed.

[0024] Working Principle: The core of the motor assembly structure of this invention consists of three parts: motor 1, upper copper tube 2, and lower copper tube 3. The lower copper tube 3 is integrally formed with the outer frame of the cooling fan. Its connection logic and stability principle revolve around the component structure matching, assembly process, and closed-loop constraints after assembly. The core structural matching relationship is reflected in the design of each component. The upper copper tube 2 has an annular snap-fit ​​21 at the top and an external thread 22 at the bottom. The lower copper tube 3 has an internal thread at the top that matches the external thread 22 of the upper copper tube 2, and a plastic step 4 on the outside. A plastic positioning post is set at the top of the step. The plastic part at the top of the motor 1 has an elastic plastic chamfer 41 and a positioning groove inside that matches the plastic positioning post. The mutual matching of each structure lays the foundation for a stable connection.

[0025] The assembly process first achieves lateral positioning of motor 1 by aligning the positioning slot of motor 1 with the plastic positioning post of the lower copper tube 3. An interference fit is used to fix motor 1 and the lower copper tube 3 laterally, preventing motor 1 from wobbling left or right. Next, a spiral connection and snap-fit ​​are performed by aligning the external thread 22 of the upper copper tube 2 with the internal thread of the lower copper tube 3. The upper copper tube 2 is rotated until the two are spirally engaged. During this process, the retaining clip 21 at the top of the upper copper tube 2 is pressed along the plastic chamfer 41 of motor 1. The plastic chamfer 41 deforms due to its elasticity. After rotation to the desired position, the plastic chamfer 41 springs back to its original position, and the retaining clip 21 is locked in place, completing the overall connection between motor 1 and the copper tube. After assembly, motor 1 and the copper tube form a stable structure through mutual restraint, achieving closed-loop fixation: In the lateral direction, motor 1 is tightly fitted with the plastic positioning post through the positioning groove, directly restricting the left and right displacement of motor 1. At the same time, the latch 21 of the upper copper tube 2 is engaged by the plastic chamfer 41 of motor 1, preventing left and right rotation, further indirectly restricting the left and right wobbling of motor 1; In the axial direction, when motor 1 tends to wobble upwards, the top of motor 1 is blocked by the annular metal surface at the top of the upper copper tube 2. For motor 1 to move upwards, it needs to drive the upper copper tube 2 to move upwards. The upper copper tube 2 and the lower copper tube 3 are connected by a spiral, and can only move up and down by rotating left and right. The upper copper tube 2 cannot rotate because the clamp 21 is locked by the plastic chamfer 41, so the upper copper tube 2 cannot move up and down, thus restricting the upward swaying of the motor 1. Finally, the lateral and axial displacement of the motor 1 is restricted by the structure of the upper copper tube 2 and the lower copper tube 3, and the rotation and displacement of the upper copper tube 2 are restricted by the plastic chamfer 41 of the motor 1. The three form a structural closed loop of motor 1, upper copper tube 2 and lower copper tube 3, ensuring the overall connection is stable.

[0026] This utility model provides a motor assembly structure that, through an innovative design of segmented copper tubes, spiral connections, and inverted snap-fit, eliminates the need for adhesive bonding compared to existing dispensing fixation technology. Instead, it employs a mechanical structure for instant fixation, eliminating the need to wait for the adhesive to cure. The assembly process can be completed in one step, significantly shortening the overall assembly cycle of the cooling fan and reducing production waiting costs. Through the combination of the spiral structure and the inverted snap-fit, the motor and copper tube form a large-area, tight metal-to-metal direct contact. This means that the motor stator silicon steel sheets and the copper tube directly conduct heat, with the inter-metal thermal resistance being much lower than that of the adhesive layer. The heat generated by the motor can be quickly conducted to the copper tube, completely solving the heat dissipation bottleneck problem in existing technologies, effectively reducing the motor's operating temperature and extending its lifespan.

[0027] In the horizontal direction, the motor is tightly fitted with the plastic positioning post of the lower copper tube via an internal positioning groove, directly restricting the motor's left-right swaying. In the axial direction, the top metal surface of the upper copper tube is tightly fitted with the top of the motor, while the clamp of the upper copper tube engages with the chamfered plastic of the motor. Combined with the spiral structure's anti-rotation and anti-vertical movement closed-loop constraint, this prevents the motor from swaying up and down. The overall vibration and impact resistance far exceeds that of adhesive fixing, eliminating the risk of loosening due to adhesive aging. Furthermore, this design eliminates the adhesive dispensing process, requiring no manual application of adhesive or monitoring of the curing process. The assembly steps only require three steps: the motor tightly fitting the positioning post, the spiral connection of the upper copper tube, and the clamp engagement. The operation is simple and easily standardized, reducing labor input and lowering labor costs and operational errors in the production process.

[0028] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A motor assembly structure, characterized in that, The device includes a motor, an upper copper tube, and a lower copper tube. The upper copper tube has a snap-fit ​​at the top and an external thread at the bottom. The lower copper tube has an internal thread at the top and a plastic step integrally formed with the outer frame on its outer side. A plastic positioning post is located at the top of the plastic step. The top plastic part of the motor has a plastic chamfer and an internal positioning groove that matches the plastic positioning post. The upper copper tube is spirally connected to the lower copper tube via the external thread and the internal thread. When rotated to the correct position, the snap-fit ​​of the upper copper tube is pressed along the plastic chamfer and then springs back to lock in place. The motor is tightly fitted with the plastic positioning post through the positioning groove, forming a fixed connection between the motor and the copper tube.

2. The motor assembly structure according to claim 1, characterized in that, The snap-fit ​​of the upper copper tube is a continuous annular snap-fit, which is set along the inner circumference of the top of the upper copper tube.

3. The motor assembly structure according to claim 1, characterized in that, The lower copper tube and the outer frame are formed by an integral injection molding process, and the plastic positioning posts are evenly distributed around the top of the plastic steps.

4. The motor assembly structure according to claim 1, characterized in that, The number of positioning slots of the motor is the same as the number of plastic positioning posts, and the width of the positioning slots is interference-fitted with the diameter of the plastic positioning posts.

5. The motor assembly structure according to claim 1, characterized in that, The plastic chamfer has an inclination angle of 30°-60°, and the chamfer surface has a smooth transition surface.

6. The motor assembly structure according to claim 1, characterized in that, The external thread of the upper copper tube and the internal thread of the lower copper tube are fine threads, and the thread direction is right-hand.

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