Motor end cover locking device and brushless motor
By combining the retaining ring and the fixing post, the problem of circular integrity of the end cover locking structure of the brushless motor when the axial push force is increased is solved, realizing tight connection and efficient assembly, which is convenient for mass production.
Patent Information
- Application Number
- CN202423047989.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-11
- Publication Date
- 2025-11-11
- Estimated Expiration
- 2034-12-11
AI Technical Summary
The existing brushless motor end cap locking structure has difficulty maintaining the circular integrity of the motor when the axial pushing force is increased, and the installation efficiency is low.
The design employs a combination of a retaining ring and a fixing post. The retaining ring is embedded in a groove in the outer shell, and the fixing post secures the retaining ring to the end cover, achieving a tight connection between the end cover and the outer shell, maintaining the circular integrity of the motor and increasing the axial pushing force.
It achieves a tight connection between the end cap and the outer shell, enhances the axial pushing force, has a simple structure, small size, and is easy to assemble. It does not require stamping dies and special fixtures, making it easy for mass production.
Smart Images
Figure CN223540359U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of motor technology, and in particular to a motor end cover locking device and a brushless motor. Background Technology
[0002] There are generally two structures for locking brushless motor end caps in existing technology. The first type uses a stamped metal motor housing. This type typically uses a rivet to deform the housing and lock the end cap in place. The advantage of this method is quick assembly and it ensures the integrity of the circular motor outer ring. The disadvantage is that assembly requires stamping equipment and specialized molds. Also, this end cap installation method can withstand low pushing forces and is not suitable for applications with high axial forces. The second type uses a die-cast aluminum alloy or similar metal motor housing. This type typically uses screws, which lock the end cap into the threaded holes in the housing. The advantage of this method is that it does not require specialized molds or stamping equipment; only a wrench or screwdriver with the corresponding screw is needed for installation. End caps using this method can withstand greater pushing forces and are suitable for applications with high axial forces. The disadvantage of this installation method is its low installation efficiency due to the need to tighten the screws. The biggest drawback of this structure is that it cannot maintain the integrity of the circular motor. Because the outer casing needs threaded holes but cannot encroach on the internal space of the motor, the existing outer casing and rear end cover usually protrude from the circular casing, which damages the integrity of the circular motor and makes it unusable in situations where a circular motor is required. Utility Model Content
[0003] The technical problem to be solved by this utility model embodiment is that it is difficult to maintain the integrity of the circular motor by increasing the axial pushing force of the end cap.
[0004] To address the aforementioned problems, this utility model discloses a motor end cap locking device. The locking end cap has a smaller structural volume and effectively maintains the integrity of the circular motor while increasing the axial push-out resistance.
[0005] In a first aspect, this utility model provides a motor end cap locking device, which includes a housing with a groove; an end cap with a connecting part and a first connecting hole, the outer diameter of the connecting part gradually increasing from top to bottom; a retaining ring with a second connecting hole and an opening, the outer diameter of the retaining ring gradually increasing from top to bottom, the inner diameter of the retaining ring gradually increasing from top to bottom, the retaining ring surrounding the connecting part, and the retaining ring being able to be embedded in the groove; and a fixing post that can pass through the first connecting hole and the second connecting hole.
[0006] A further technical solution is that the width of the opening gradually increases from top to bottom.
[0007] A further technical solution is that the end cap is also provided with a positioning part, the width of which gradually increases from top to bottom, and the positioning part can be embedded in the opening.
[0008] A further technical solution is that the retaining ring has a protrusion, the second connecting hole is provided on the protrusion, the end cap has a limiting groove, and the protrusion can be embedded in the limiting groove.
[0009] A further technical solution is that the number of the first connecting holes is multiple, and they are evenly distributed on the end cap.
[0010] A further technical solution is that the number of the second connecting holes is multiple, and they are evenly distributed on the retaining ring.
[0011] A further technical solution is that the fixing column is a bolt, and the second connecting hole is threaded.
[0012] A further technical solution is that the end cap is provided with a wire hole.
[0013] A further technical solution includes a stator assembly, a mover assembly, and a circuit board, wherein the stator assembly, the mover assembly, and the circuit board are respectively disposed within the housing and on the same side of the end cover.
[0014] Secondly, this utility model provides a brushless motor, including a motor end cap locking device as described in any embodiment of the first aspect.
[0015] Compared with the prior art, the technical effects achieved by the embodiments of this utility model include:
[0016] The retaining ring is fixed to the end cover by a fixing post. The outer wall of the retaining ring is embedded in the groove of the outer shell, which improves the parallelism of the connection between the end cover and the outer shell. The expanded retaining ring is embedded in the groove, which improves the tightness of the connection between the end cover and the outer shell. The end cover can withstand strong axial pushing force. This motor end cover locking device has a simple structure, small size, and simple assembly. It does not require stamping molds and special fixtures, which is convenient for mass production. Attached Figure Description
[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments 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 based on these drawings without creative effort.
[0018] Figure 1 A schematic diagram of a motor end cover locking device provided in an embodiment of this utility model;
[0019] Figure 2 A schematic diagram of another motor end cover locking device provided in an embodiment of this utility model;
[0020] Figure 3 A schematic diagram of another motor end cover locking device provided in this embodiment of the utility model;
[0021] Figure 4 for Figure 3 A magnified view of a portion of the image;
[0022] Figure 5 A schematic diagram of another motor end cover locking device provided in this embodiment of the utility model;
[0023] Figure 6 A schematic diagram of another motor end cover locking device provided in this embodiment of the utility model;
[0024] Figure 7 This is a schematic diagram of another motor end cover locking device provided in an embodiment of the present utility model.
[0025] Figure Labels
[0026] 1. Fixed post, 2. End cap, 3. Snap ring, 4. Housing, 5. Moving part assembly, 6. Stator assembly, 7. Circuit board, 41. Groove, 21. Connecting part, 22. First connecting hole, 31. Second connecting hole, 32. Opening, 23. Positioning part, 33. Protrusion, 24. Wire hole. Detailed Implementation
[0027] The technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Similar component reference numerals in the drawings represent similar components. Obviously, the embodiments described below are only some embodiments of this utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.
[0028] It should be understood that, when used in this specification and the appended claims, the terms "comprising" and "including" indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.
[0029] It should also be understood that the terminology used in this specification of embodiments of the present invention is for the purpose of describing particular embodiments only and is not intended to limit the embodiments of the present invention. As used in this specification of embodiments of the present invention and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.
[0030] See Figure 1-7 This utility model embodiment provides a locking device for a motor end cover 2. The locking device includes a housing 4 with a groove 41; an end cover 2 with a connecting portion 21 and a first connecting hole 22, the outer diameter of the connecting portion 21 gradually increasing from top to bottom; a retaining ring 3 with a second connecting hole 31 and an opening 32, the outer diameter of the retaining ring 3 gradually increasing from top to bottom, the inner diameter of the retaining ring 3 gradually increasing from top to bottom, the retaining ring 3 surrounding the connecting portion 21, and the retaining ring 3 being able to be embedded in the groove 41; and a fixing post 1 that can pass through the first connecting hole 22 and the second connecting hole 31. Specific descriptions of each component are as follows:
[0031] In this embodiment, the outer shell 4 is a cylindrical structure, and the groove 41 is installed on the inner wall of the outer shell 4 and close to the cylindrical opening side of the outer shell 4. The end cap 2 is used to cover the cylindrical opening of the outer shell 4. The retaining ring 3 is a ring structure with an opening 32. The retaining ring 3 expands / tightens through the opening 32. The first connecting hole 22 is below the second connecting hole 31. The fixing post 1 can pass through the first connecting hole 22 and the second connecting hole 31 respectively. The retaining ring 3 is sleeved around the connecting part 21 of the end cap 2. The inner wall of the retaining ring 3 fits tightly with the outer wall of the connecting part 21. When the retaining ring 3 expands, the outer wall of the retaining ring 3 is embedded in the groove 41.
[0032] The installation process of the locking device for the motor end cover 2 is as follows:
[0033] Place the retaining ring 3 directly above the end cap 2. The fixing post 1 passes through the first connecting hole 22 and the second connecting hole 31. Place the retaining ring 3 into the outer shell 4. The retaining ring 3 and the end cap 2 are tightly fitted together by the fixing post 1. The retaining ring 3 gradually expands until the outer wall of the retaining ring 3 is embedded in the groove 41 of the outer shell 4, thereby achieving a fixed connection between the outer shell 4 and the end cap 2.
[0034] The retaining ring 3 is fixed to the end cover 2 by the fixing post 1. The outer wall of the retaining ring 3 is embedded in the groove 41 of the outer shell 4, which improves the parallelism of the connection between the end cover 2 and the outer shell 4 and maintains the circular integrity of the motor. The expanded retaining ring 3 is embedded in the groove 41, which improves the tightness of the connection between the end cover 2 and the outer shell 4. The end cover 2 can withstand strong axial pushing force. The locking device of the motor end cover 2 has a simple structure, small size and simple assembly. It does not require stamping molds and special fixtures, which is convenient for mass production.
[0035] See also Figure 1-7 In this embodiment, the width of the opening 32 gradually increases from top to bottom.
[0036] Specifically, the top inner diameter of the retaining ring 3 is smaller than the bottom inner diameter, the top outer diameter of the retaining ring 3 is smaller than the bottom outer diameter, and the top width of the opening 32 is smaller than the bottom width, ensuring that the top and bottom of the retaining ring 3 have the same expansion / tightening strength.
[0037] Furthermore, the end cap 2 is also provided with a positioning part 23, the width of which gradually increases from top to bottom, and the positioning part 23 can be embedded in the opening 32.
[0038] Specifically, the top width of the positioning part 23 is smaller than the bottom width, while the bottom width of the opening 32 is larger than the top width, and the bottom width of the opening 32 is larger than the top width of the positioning part 23, so that the positioning part 23 can be inserted into the opening 32.
[0039] Furthermore, the retaining ring 3 is provided with a protrusion 33, the second connecting hole 31 is provided on the protrusion 33, the end cap 2 is provided with a limiting groove, and the protrusion 33 can be embedded in the limiting groove.
[0040] Specifically, the protrusion 33 is installed on the inner wall of the retaining ring 3. In this embodiment, there are multiple protrusions 33, and all protrusions 33 are evenly distributed on the retaining ring 3. The second connecting hole 31 is installed on the protrusion 33. There are multiple connecting parts 21 of the end cap 2. A limiting groove of the end cap 2 is formed between two connecting parts 21. The width of the limiting groove is greater than or equal to the width of the protrusion 33, so that the protrusion 33 can be embedded in the limiting groove. The first connecting hole 22 is directly below the second connecting hole 31.
[0041] Furthermore, there are multiple first connecting holes 22, which are evenly distributed on the end cap 2.
[0042] Furthermore, there are multiple second connecting holes 31, which are evenly distributed on the retaining ring 3.
[0043] Specifically, the number of first connecting holes 22 is equal to the number of second connecting holes 31, and the retaining ring 3 is sleeved on the connecting part 21, with the first connecting holes 22 and the second connecting holes 31 aligned one by one.
[0044] Furthermore, the fixing post 1 is a bolt, and the second connecting hole 31 is threaded.
[0045] Specifically, the fixing post 1 is a bolt. The fixing post 1 passes through the first connecting hole 22 and is screwed into the second connecting hole 31, so that the retaining ring 3 moves closer to the end cover 2. The inner wall of the retaining ring 3 fits tightly with the outer wall of the connecting part 21. The inner diameter of the retaining ring 3 gradually increases from top to bottom, and the outer diameter of the connecting part 21 gradually increases from top to bottom. The retaining ring 3 moves downward to expand. The retaining ring 3 and the connecting part 21 are detachably connected through the fixing post 1.
[0046] Furthermore, the end cap 2 is provided with a wire hole 24.
[0047] Specifically, the connecting wires of the PCB-A assembly pass through the wire holes 24 of the end cover 2 and are electrically connected to external devices.
[0048] Furthermore, it also includes a stator assembly 6, a mover assembly 5, and a circuit board 7, wherein the stator assembly 6, the mover assembly 5, and the circuit board 7 are respectively disposed inside the housing 4 and on the same side of the end cover 2.
[0049] Specifically, the stator assembly 6 and the mover assembly 5 form a driving function. In this embodiment, the stator assembly 6, the mover assembly 5, and the circuit board 7 are respectively disposed in the housing 4. Typically, the mover assembly 5 includes a shaft that abuts against the end cover 2. The motor end cover 2 locking device can withstand strong axial pushing force to prevent the end cover 2 from falling off during rotation and avoids the shaft abutting against the end cover 2.
[0050] This utility model embodiment also provides a brushless motor, characterized in that it includes a motor end cover 2 locking device as described in any of the above claims.
[0051] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.
[0052] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0053] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.
[0054] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between 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.
[0055] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0056] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. The illustrative expressions of the above terms in this specification should not be construed as necessarily referring to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.
[0057] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Since these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.
[0058] The above description describes specific embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should all be covered within the scope of protection of this utility model. Therefore, the scope of protection of this utility model should be determined by the scope of the claims.
Claims
1. A motor end cover locking device, characterized in that, include: The outer casing has grooves; The end cap is provided with a connecting part and a first connecting hole, and the outer diameter of the connecting part gradually increases from top to bottom; A retaining ring is provided with a second connecting hole and an opening. The outer diameter of the retaining ring gradually increases from top to bottom, and the inner diameter of the retaining ring gradually increases from top to bottom. The retaining ring surrounds the connecting part and can be inserted into the groove. The fixing post can pass through the first connecting hole and the second connecting hole.
2. The motor end cover locking device according to claim 1, characterized in that, The width of the opening gradually increases from top to bottom.
3. The motor end cover locking device according to claim 1, characterized in that, The end cap is also provided with a positioning part, the width of which gradually increases from top to bottom, and the positioning part can be embedded in the opening.
4. The motor end cover locking device according to claim 1, characterized in that, The retaining ring has a protrusion, the second connecting hole is provided on the protrusion, the end cap has a limiting groove, and the protrusion can be embedded in the limiting groove.
5. The motor end cover locking device according to claim 1, characterized in that, The number of the first connecting holes is multiple, and they are evenly distributed on the end cap.
6. The motor end cover locking device according to claim 1, characterized in that, The second connecting hole is multiple and evenly distributed on the retaining ring.
7. The motor end cover locking device according to claim 1, characterized in that, The fixing post is a bolt, and the second connecting hole is threaded.
8. The motor end cover locking device according to claim 1, characterized in that, The end cap is provided with a wire hole.
9. The motor end cover locking device according to claim 1, characterized in that, It also includes a stator assembly, a mover assembly, and a circuit board, wherein the stator assembly, the mover assembly, and the circuit board are respectively disposed within the housing and on the same side of the end cover.
10. A brushless motor, characterized in that, Includes the motor end cap locking device as described in any one of claims 1-9.