Anti-vibration rotor assembly and its direct current motor

Abstract

The utility model provides an anti -vibration stator assembly and direct current motor thereof, for anti -vibration stator assembly, including casing and stator framework, the radial even extension of stator framework has a plurality of coil framework, and coil framework is used for winding fixed coil, and the inwall of casing is constituted with the outer wall of coil framework and the inwall of casing between perfusion cavity, and the perfusion cavity is perfused with epoxy resin. Through the solidification layer formed by epoxy resin perfusion, the elastic buffer structure is constructed between the stator framework and the casing, the vibration energy is effectively absorbed, the relative displacement risk of stator assembly under the vibration or impact load is reduced significantly, and the looseness problem caused by the pure friction fixation of traditional interference fit is avoided.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, specifically to an anti-vibration stator assembly and its DC motor. Background Technology

[0002] DC motors typically consist of a stator assembly and a housing. In traditional designs, the stator assembly and housing are usually connected and fixed using an interference fit. While interference fits provide a certain level of securing force, this fixing method has significant drawbacks in practical applications, especially under vibration conditions:

[0003] 1. Since interference fits mainly rely on friction for fixation, under long-term vibration or impact loads, relative displacement can easily occur between the stator assembly and the housing, resulting in uneven air gap inside the motor and even affecting electromagnetic performance.

[0004] 2. The interference fit lacks effective buffering and vibration-damping structure. Under severe vibration environment, the stator assembly may loosen, which will affect the operation stability and reliability of the motor.

[0005] 3. The relative displacement between the stator and the housing may cause changes in the air gap of the motor and asymmetry in the magnetic circuit, which in turn can lead to torque fluctuations, reduced efficiency, and even abnormal wear or failure of the motor.

[0006] Therefore, there is an urgent need for a new type of stator fixing structure to improve the stability and durability of DC motors in vibration environments. Utility Model Content

[0007] To address the technical problems in the background art, this utility model discloses an anti-vibration stator assembly and its DC motor.

[0008] This utility model provides an anti-vibration stator assembly, including a housing and a stator frame. The stator frame has multiple coil frames extending radially and uniformly. The coil frames are used to wind and fix the coils. The outer wall of the coil frames and the inner wall of the housing form a filling cavity.

[0009] The injection cavity is filled with epoxy resin.

[0010] Furthermore, the coil bobbin has protrusions at both ends of the housing in the radial direction; the inner wall of the housing has slots for engaging the protrusions; the area between the protrusions and the inner wall of the stator bobbin form an injection cavity.

[0011] Furthermore, the raised strip and the slot fit together, and the mirror surface is connected.

[0012] Furthermore, the area between the protrusions on the outer side of the coil frame is designated as a connecting surface; a gap is provided between the connecting surface and the inner wall of the housing.

[0013] Furthermore, the connecting surface is a flat end face.

[0014] Furthermore, the connecting surface is a concave arc surface.

[0015] Furthermore, sealing rings are snapped onto both ends of the inner wall of the housing; the radial projection of the sealing ring is T-shaped and consists of a sealing ring and a snap-fit ​​sleeve; the sealing ring fits against the end face of the housing; the snap-fit ​​sleeve fits against the inner wall of the housing; the thickness of the snap-fit ​​sleeve is configured such that the end of the snap-fit ​​sleeve seals the injection cavity at both ends of the housing along the axial direction.

[0016] Furthermore, recessed mounting platforms are provided at both ends of the housing; both ends of the coil frame are flush with the mounting platforms; and the snap-fit ​​sleeve is snapped into the mounting platforms.

[0017] This utility model also provides a DC motor with an anti-vibration stator assembly.

[0018] The beneficial effects of this utility model are:

[0019] 1. The cured layer formed by epoxy resin infusion creates an elastic buffer structure between the stator frame and the housing, effectively absorbing vibration energy and significantly reducing the risk of relative displacement of the stator assembly under vibration or impact loads, avoiding the loosening problem caused by pure friction fixation in traditional interference fits.

[0020] 2. After the epoxy resin cures, it fills the injection cavity evenly, ensuring the concentricity of the stator and the housing, maintaining the uniformity of the motor air gap, thereby reducing problems such as magnetic circuit asymmetry and torque fluctuation, improving motor operating efficiency and reducing the risk of abnormal wear.

[0021] 3. The adhesive properties of epoxy resin enable the stator frame and the housing to form a composite fixed structure. Combining chemical adhesive force and physical interference fit, it provides double protection for connection strength, which is especially suitable for durability requirements under long-term vibration conditions. Attached Figure Description

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0023] Figure 1 This is a schematic diagram of the structure of this utility model;

[0024] Figure 2 This is a front sectional view of the present invention;

[0025] Figure 3 yes Figure 2 Enlarged view of point A in the middle;

[0026] Figure 4 This is a right view of the present invention, in which the sealing ring is hidden;

[0027] Figure 5 yes Figure 4 Enlarged view of point B in the middle;

[0028] Figure 6 This is the front view of the stator frame;

[0029] Figure 7 yes Figure 6 Enlarged view of point C in the middle;

[0030] Figure 8 This is a structural diagram of the casing;

[0031] Figure 9 This is the front view of the casing;

[0032] Figure 10 yes Figure 9 Sectional view of DD;

[0033] In the diagram: 1. Housing; 2. Stator frame; 3. Coil frame; 4. Injection cavity; 5. Raised strip; 6. Slot; 7. Connecting surface; 8. Sealing ring; 9. Clamping platform; 81. Sealing ring; 82. Clamping sleeve. Detailed Implementation

[0034] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0035] Example 1:

[0036] like Figure 1-10 As shown, this utility model discloses an anti-vibration stator assembly, including a housing 1 and a stator frame 2. Multiple coil frames 3 extend radially and uniformly from the stator frame 2, and the coil frames 3 are used to wind and fix the coils.

[0037] The coil frame 3 has protrusions 5 at both ends of the housing 1 in the radial direction; the inner wall of the housing 1 has slots 6 for engaging the protrusions 5, thus achieving the engagement and positioning of the coil frame 3 with the housing 1. Both the protrusions 5 and the slots 6 are of inferior arc shape, and the protrusions 5 and the slots 6 fit together and are sealed by mirror connection.

[0038] The area between the protrusions 5 on the outer surface of the coil frame 3 is designated as the connecting surface 7; a gap is provided between the connecting surface 7 and the inner wall of the housing 1. In this embodiment, the connecting surface 7 is a flat end face; in other embodiments, the connecting surface 7 may also be a concave arc surface. With this configuration, a gap is provided between the connecting surface 7 and the inner wall of the housing 1.

[0039] Sealing rings 8, made of polytetrafluoroethylene, are snapped onto both ends of the inner wall of the housing 1. The specific snapping structure of the sealing rings 8 is as follows: recessed mounting platforms 9 are provided at both ends of the inner wall of the housing 1, and the end of the stator frame 2 is flush with the mounting platforms 9. The radial projection of the sealing rings 8 is T-shaped, consisting of a sealing ring 81 and a snap-fit ​​sleeve 82. The sealing ring 81 fits against the end face of the housing 1; the snap-fit ​​sleeve 82 fits against the inner wall of the housing 1, and the end of the snap-fit ​​sleeve 82 abuts against the mounting platform 9 and covers the gap between the connecting surface 7 and the inner wall of the housing 1. Thus, the snap-fit ​​sleeve 82, the inner wall of the housing 1, the connecting surface 7, and the protrusion 5 form a closed injection cavity 4, in which epoxy resin is injected.

[0040] The epoxy resin injection process is as follows:

[0041] S1. Install one of the sealing rings 8 at one end of the housing 1, and install a blind flange (or the end cover of the DC motor can be directly installed in other embodiments) at this end of the housing 1 and lock it with bolts; at this time, the sealing rings 81 are sandwiched between the blind flange and the housing 1 to achieve a seal;

[0042] S2. Place the end of the housing 1 with the blind flange at the bottom, and the other end facing upwards;

[0043] S3. Insert the stator frame 2 into the housing 1, and make the protrusion 5 engage with the slot 6.

[0044] S4. Pour epoxy resin into injection cavity 4;

[0045] S5. Another sealing ring 8 and another blind flange are installed sequentially on the upper end of the housing 1 (in other embodiments, the tail cap can also be directly installed).

[0046] S6. Place the above-mentioned assembly in a heating device and heat it at a temperature of 50-70℃ to solidify the epoxy resin; room temperature solidification can also be used, which is cheaper but takes longer.

[0047] Compared to existing technologies, the advantages of this embodiment are: 1. The cured layer formed by epoxy resin infusion creates an elastic buffer structure between the stator frame 2 and the housing 1, effectively absorbing vibration energy and significantly reducing the risk of relative displacement of the stator assembly under vibration or impact loads, avoiding the loosening problem caused by pure friction fixation in traditional interference fits. 2. After curing, the epoxy resin uniformly fills the infusion cavity 4, ensuring the concentricity of the stator and housing 1, maintaining the uniformity of the motor air gap, thereby reducing problems such as magnetic circuit asymmetry and torque fluctuations, improving motor operating efficiency and reducing the risk of abnormal wear. 3. The adhesive properties of epoxy resin enable the stator frame 2 and housing 1 to form a composite fixing structure, combining chemical adhesion and physical interference fit, providing double protection for connection strength, especially suitable for durability requirements under long-term vibration conditions.

[0048] Example 2:

[0049] This utility model also discloses a DC motor, including the anti-vibration stator assembly in Embodiment 1.

[0050] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A vibration-resistant stator assembly, comprising a housing (1) and a stator frame (2), wherein a plurality of coil frames (3) extend radially and uniformly from the stator frame (2), the coil frames (3) being used for winding and fixing coils, characterized in that: The outer wall of the coil frame (3) and the inner wall of the housing (1) form a filling cavity (4); The injection cavity (4) is filled with epoxy resin.

2. The vibration-resistant stator assembly according to claim 1, characterized in that: The coil frame (3) is provided with protrusions (5) at both ends of the housing (1) in the radial direction; The inner wall of the housing (1) is provided with a slot (6) for engaging the protruding strip (5); The area between the convex strips (5) of the coil frame (3) and the inner wall of the stator frame (2) form a filling cavity (4).

3. The vibration-resistant stator assembly according to claim 2, characterized in that: The protrusion (5) and the slot (6) fit together and are mirror-connected.

4. The vibration-resistant stator assembly according to claim 3, characterized in that: The area between the protrusions (5) on the outer side of the coil frame (3) is designated as the connecting surface (7); A gap is provided between the connecting surface (7) and the inner wall of the casing (1).

5. The vibration-resistant stator assembly according to claim 4, characterized in that: The connecting surface (7) is a straight end face.

6. The vibration-resistant stator assembly according to claim 4, characterized in that: The connecting surface (7) is a concave arc surface.

7. The vibration-resistant stator assembly according to claim 3, characterized in that: The two ends of the inner wall of the housing (1) are fitted with sealing rings (8); The sealing ring (8) has a T-shaped radial projection and is composed of a sealing ring (81) and a snap-fit ​​sleeve (82); The sealing ring (81) is fitted to the end face of the housing (1); The snap-fit ​​sleeve (82) fits against the inner wall of the housing (1); The thickness of the snap-fit ​​sleeve (82) is configured such that the end of the snap-fit ​​sleeve (82) seals the injection cavity (4) at both ends of the housing (1) in the axial direction.

8. The vibration-resistant stator assembly according to claim 7, characterized in that: The housing (1) has recessed mounting plates (9) at both ends; The two ends of the coil frame (3) are flush with the card plate (9); The snap-fit ​​sleeve (82) snaps into the snap-fit ​​platform (9).

9. A DC motor, characterized in that: Includes the vibration-resistant stator assembly according to any one of claims 1-8.

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