Insulation protection device fixing assembly and motor provided with the same

Abstract

The present invention provides an insulating protection device fixing assembly and a motor provided with the same, which relates to the technical field of motors, and solves the technical problem in the prior art that the insulating protection device is not firmly fixed, which easily causes the electrical clearance of the motor to be substandard and affects the performance of the motor. The insulating protection device fixing assembly includes an insulating protection device body and an outlet pipe; wherein the outlet pipe is fixedly connected to the motor end cover, a first fixing structure is provided on the insulating protection device body, and a second fixing structure is provided on the outlet pipe, and the first fixing structure is connected to the second fixing structure to at least limit the movement of the insulating protection device body along its axial direction and the rotation around its axis. The motor includes a motor end cover, a motor stator, a rotor assembly, and the insulating protection device fixing assembly provided by the present invention. The present invention is used to provide an insulating protection device fixing assembly and a motor that can ensure that the electrical clearance of the motor meets the standard and guarantee the performance of the motor.

Description

Technical Field

[0001] The present invention relates to the technical field of motors, and in particular to an insulation protection device fixing assembly and a motor provided with the insulation protection device fixing assembly. Background Art

[0002] In order to ensure that the electrical clearance between the motor control board and the motor end cover meets the requirements in a brushless DC motor, it is usually necessary to ensure that the distance between the motor control board and the motor end cover is greater than the specified value, or to set an insulation protection device between the motor control board and the motor end cover; currently, commonly used insulation protection devices such as Figure 1 As shown, at least three pins are arranged on the outer periphery of the insulating protection device. During assembly, the pins are bent and abutted against the inner wall surface of the motor end cover. The elastic action of the pins abutting against the inner wall surface of the motor end cover limits the movement and rotation of the insulating protection device along its axial direction to ensure that the insulating protection device is installed in coordination with the control board of the motor; or, in order to be more secure, double-sided tape is pasted between the inner wall of the end cover and the pins to fix them, so as to prevent them from falling off or shifting, resulting in the motor electrical clearance not meeting the standard and affecting the motor performance.

[0003] The applicant has found that the prior art has at least the following technical problems:

[0004] 1. The conventional method of fixing the insulation protection device is very unreliable, as it only relies on the friction force generated by the elasticity of the pin against the inner wall of the motor end cover for positioning. The insulation protection device is easily displaced or falls off, resulting in the motor electrical clearance not meeting the standard and affecting the motor performance.

[0005] 2. The prior art method of fixing the insulating protection device is to stick double-sided tape between the inner wall of the end cover and the pin, which increases the assembly process and has low production efficiency. Summary of the invention

[0006] The object of the present invention is to provide an insulation protection device fixing assembly and a motor provided with the insulation protection device fixing assembly, so as to solve the technical problem in the prior art that the insulation protection device is not fixed firmly, is easily displaced or falls off, causes the electrical clearance of the motor to be substandard, and affects the performance of the motor. The various technical effects that can be produced by the preferred technical solution among the various technical solutions of the present invention are described in detail below.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] The insulating protection device fixing assembly provided by the present invention comprises an insulating protection device body and an outlet pipe; wherein,

[0009] The outlet pipe is fixedly connected to the motor end cover, a first fixing structure is arranged on the insulation protection device body, and a second fixing structure is arranged on the outlet pipe. The first fixing structure is connected with the second fixing structure to at least limit the axial movement and rotation of the insulation protection device body around its axis.

[0010] In a preferred or optional embodiment, the first fixing structure and the second fixing structure are connected by a snap-fit ​​connection.

[0011] In a preferred or optional embodiment, the second fixing structure is a hook-shaped structure, and the first fixing structure is a snap-fitting groove matching the second fixing structure.

[0012] In a preferred or optional embodiment, a limiting groove is further provided on the insulation protection device body, and the limiting groove is located at the outer peripheral edge of the insulation protection device body.

[0013] In a preferred or optional embodiment, the second fixing structure is a fixing boss, the first fixing structure is a fixing groove matching the fixing boss, and the fixing boss can be inserted into the fixing groove.

[0014] In a preferred or optional embodiment, a marking groove is further provided in the area surrounding the fixing boss.

[0015] The motor provided in the embodiment of the present invention comprises a motor end cover, a motor stator, a rotor assembly and an insulation protection device fixing assembly provided by any technical solution of the present invention; wherein,

[0016] The motor stator and the insulation protection device body are both arranged in the motor end cover. The motor end cover is provided with a mounting hole, and the outlet pipe is fixedly connected to the mounting hole.

[0017] In a preferred or optional embodiment, a first clamping ring and a second clamping ring are provided on the outlet tube, and the second fixing structure is provided on the second clamping ring. A clamping groove is formed between the first clamping ring and the second clamping ring. The first clamping ring can pass through the mounting hole to pass through the motor end cover and clamp the outer edge of the mounting hole in the clamping groove so that the outlet tube is fixedly connected to the motor end cover.

[0018] In a preferred or optional embodiment, at least the surface of the second clamping ring that contacts the outer edge of the mounting hole is an arc surface.

[0019] In a preferred or optional embodiment, the outlet pipe is made of soft rubber.

[0020] Based on the above technical solution, the embodiments of the present invention can at least produce the following technical effects:

[0021] The insulating protection device fixing assembly provided by the present invention comprises an insulating protection device body and an outlet pipe, wherein the outlet pipe is fixedly connected to a motor end cover, thereby limiting the relative movement between the outlet pipe and the motor end cover; after a first fixing structure on the insulating protection device body is connected to a second fixing structure on the outlet pipe, the outlet pipe at least limits the axial movement and rotation of the insulating protection device body around its axis, thereby preventing the insulating protection device body from being displaced or falling off, thereby ensuring that the electrical clearance of the motor meets the standards and the motor performance.

[0022] The preferred technical solution among the many technical solutions provided in the present invention can at least produce the following technical effects:

[0023] 1. The present invention can prevent the insulation protection device body from shifting or falling off, ensure that the insulation protection device body and the motor control board are installed in coordination with each other, make the motor electrical clearance meet the standards, and ensure the performance of the motor.

[0024] 2. The assembly operation of the present invention is simple and convenient, thereby improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 It is a schematic diagram of an insulation protection device in the prior art;

[0027] Figure 2 A schematic diagram of a first embodiment of the outlet pipe provided by the present invention;

[0028] Figure 3 A schematic diagram of a first embodiment of the insulation protection device body provided by the present invention;

[0029] Figure 4 A schematic diagram of a first connection method between the outlet pipe and the insulation protection device body provided by the present invention;

[0030] Figure 5 A schematic diagram of a second embodiment of the outlet pipe provided by the present invention;

[0031] Figure 6 A schematic diagram of a second embodiment of the insulation protection device body provided by the present invention;

[0032] Figure 7 An exploded schematic diagram of the motor provided by the present invention (with the rotor assembly omitted);

[0033] Figure 8 A half-section view of the connection method between the insulation protection device fixing assembly and the motor end cover provided by the present invention;

[0034] Fig. 9 for Figure 8 An enlarged schematic diagram of the connection method between the outlet tube and the insulation protection device body is shown.

[0035] In the figure, 1. Insulation protection device body; 11. First fixed structure; 12. Limiting groove; 13. Component avoidance port; 14. Bearing avoidance hole; 2. Outlet pipe; 21. Second fixed structure; 22. Marking groove; 23. First clamping ring; 24. Second clamping ring; 25. Clamping groove; 26. Support block; 3. Motor end cover; 31. Upper end cover; 32. Lower end cover; 33. Mounting hole; 4. Motor stator; 5. Control board; 51. Components; 6. Pins. DETAILED DESCRIPTION

[0036] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0037] The invention provides an insulation protection device fixing component which can prevent an insulation protection device body from shifting or falling off and ensure the electrical clearance and performance of a motor, and a motor provided with the insulation protection device fixing component.

[0038] Combine the following Figures 1 to 9 The technical solution provided by the present invention is described in more detail.

[0039] like Figures 1 to 9 As shown, the insulating protection device fixing assembly provided by the present invention comprises an insulating protection device body 1 and an outlet pipe 2; wherein,

[0040] The outlet pipe 2 is fixedly connected to the motor end cover 3, a first fixing structure 11 is provided on the insulation protection device body 1, and a second fixing structure 21 is provided on the outlet pipe 2. The first fixing structure 11 is connected to the second fixing structure 21 to at least limit the axial movement and rotation of the insulation protection device body 1 around its axis.

[0041] Specifically, the outlet tube 2 is used to lead out the wires in the motor end cover 3. The insulating protection device fixing assembly provided by the present invention includes an insulating protection device body 1 and an outlet tube 2. The outlet tube 2 is fixedly connected to the motor end cover 3, thereby limiting the relative movement between the outlet tube 2 and the motor end cover 3. After the first fixed structure 11 on the insulating protection device body 1 is connected to the second fixed structure 21 on the outlet tube 2, the outlet tube 2 at least limits the axial movement and rotation of the insulating protection device body 1 around its axis, thereby preventing the insulating protection device body 1 from shifting or falling off, thereby ensuring that the insulating protection device can be installed in conjunction with the control board 5 during assembly.

[0042] As a preferred or optional implementation, the first fixing structure 11 and the second fixing structure 21 are connected by a snap-fit ​​connection.

[0043] Compared with the fixing method using double-sided tape in the prior art, the snap-on connection is simple to assemble and improves assembly efficiency.

[0044] As a preferred or optional implementation, the second fixing structure 21 is a hook-shaped structure, and the first fixing structure 11 is a buckling groove matching the second fixing structure 21 .

[0045] Specifically, Figure 2 to Figure 4 As shown, the hook structure of the second fixed structure 21 can pass through the snap-fit ​​groove to fix the connection between the insulation protection device body 1 and the outlet pipe 2. Since the outlet pipe 2 and the motor end cover 3 are fixedly connected, after the second fixed structure 21 is connected to the first fixed structure 11, the rotation of the insulation protection device body 1 around its axis and the movement along its axis are restricted, thereby ensuring the electrical clearance.

[0046] As a preferred or optional implementation, a limiting groove 12 is further provided on the insulation protection device body 1 , and the limiting groove 12 is located at the outer peripheral edge of the insulation protection device body 1 .

[0047] Specifically, the limiting groove 12 and the buckling groove are both arc structures, and the central axes of the two coincide with each other; the limiting groove 12 is located outside the buckling groove, and when the second fixing structure 21 is buckled into the buckling groove, its edge is stuck into the limiting groove 12, further limiting the rotation of the insulation protection device body 1 around its axis. In addition, the bottom of the hook-shaped structure of the second fixing structure 21 is not limited to Figure 2 The inverted triangle structure shown may also be an inverted trapezoidal or hemispherical structure.

[0048] As a preferred or optional implementation, the second fixing structure 21 is a fixing boss, and the first fixing structure 11 is a fixing groove matching the fixing boss, and the fixing boss can be inserted into the fixing groove.

[0049] Specifically, Figure 5-6As shown, the fixed boss and the fixed groove can be connected in a transitional fit, and a support block 26 is formed around the fixed boss. The protruding direction of the fixed boss is away from the motor stator. Therefore, when the fixed boss is inserted into the fixed groove, the rotation of the insulation protection device body 1 around its axis is limited. The support block 26 abuts against the insulation protection device body 1 to limit the movement of the insulation protection device body 1 along its axis, thereby fixing the insulation protection device body 1 and preventing it from shifting or loosening, ensuring that the insulation protection device body 1 can be installed in conjunction with the control board 5 during assembly.

[0050] As a preferred or optional embodiment, a marking groove 22 is further provided in the area surrounding the fixing boss.

[0051] Specifically, the marking groove 22 is a through groove arranged along the thickness direction of the second fixing structure 21 , and the assembler can observe whether the fixing boss is fully inserted into the fixing groove through the gap of the marking groove 22 .

[0052] The motor provided in the embodiment of the present invention comprises a motor end cover 3, a motor stator 4, a rotor assembly and an insulation protection device fixing assembly provided by any technical solution of the present invention; wherein,

[0053] The motor stator 4 and the insulation protection device body 1 are both arranged in the motor end cover 3. The motor end cover 3 is provided with a mounting hole 33, and the outlet pipe 2 is fixedly connected to the mounting hole 33.

[0054] Specifically, the motor end cover 3 includes an upper end cover 31 and a lower end cover 32, and the upper end cover 31 and the lower end cover 32 are connected by bolts, and a space for placing the motor stator 4, the rotor assembly and various components is formed in the motor end cover 3. The motor end cover 3, the motor stator 4 and the rotor assembly are all existing technologies in the product and are not described in detail here; the mounting hole 33 is set on the upper end cover 31, and the outlet tube 2 is fixedly connected to the hole wall of the mounting hole 33, thereby realizing a fixed connection between the outlet tube 2 and the motor end cover 3.

[0055] As a preferred or optional embodiment, a first clamping ring 23 and a second clamping ring 24 are provided on the outlet pipe 2, and the second fixing structure 21 is provided on the second clamping ring 24. A slot 25 is formed between the first clamping ring 23 and the second clamping ring 24. The first clamping ring 23 can pass through the motor end cover 3 through the mounting hole 33 and clamp the outer edge of the mounting hole 33 in the slot 25 to fix the outlet pipe 2 to the motor end cover 3.

[0056] Specifically, after the outlet tube 2 and the motor end cover 3 are installed, the first clamping ring 23 is located outside the motor end cover 3 and abuts against the outer surface of the motor end cover 3, and the second clamping ring 24 is located inside the motor end cover 3 and abuts against the inner surface of the motor end cover 3, so that the outer edge of the mounting hole 33 is stuck in the slot 25, thereby realizing a fixed connection between the outlet tube 2 and the motor end cover 3, and the structure is simple and easy to assemble.

[0057] As a preferred or optional embodiment, at least the surface of the second clamping ring 24 that contacts the outer edge of the mounting hole 33 is an arc surface.

[0058] Specifically, the arc surface of the second snap ring 24 is adapted to the curvature of the inner surface of the motor end cover 3, so that the second snap ring 24 and the motor end cover 3 are tightly attached and fixed more securely; in addition, the contact surface between the first snap ring 23 and the motor end cover can also be set to an arc surface.

[0059] As a preferred or optional implementation, the outlet pipe 2 is made of soft rubber.

[0060] Specifically, the outlet tube 2 is an integrally formed structure, and the outer diameter of the first clamping ring 23 is larger than the inner diameter of the mounting hole 33 . Since the outlet tube 2 is made of soft rubber, it can be deformed to pass through the mounting hole 33 , thereby clamping the outer edge of the mounting hole 33 into the clamping groove 25 .

[0061] In addition, the motor further includes a control board 5, which is located between the motor stator 4 and the insulation protection device body 1. The control board 5 is provided with components 51, and the insulation protection device body 1 is provided with a component avoidance opening 13. The size of the component avoidance opening 13 matches the outer contour size of the component 51, which can prevent the component 51 from being blocked, ensure the heat dissipation requirements of the component 51, prevent the occurrence of the burn-in phenomenon, and ensure the insulation protection requirements. The rotor assembly is provided with a rotor bearing, and the insulation protection device body 1 is also provided with a bearing avoidance hole to avoid interference between the insulation protection device body 1 and the rotor bearing.

[0062] Unless otherwise stated, any technical solution disclosed in the present invention disclosed above, if it discloses a numerical range, then the disclosed numerical range is a preferred numerical range, and any technician in the field should understand that the preferred numerical range is only a numerical value with a more obvious technical effect or representative value among many implementable numerical values. Since there are too many numerical values ​​to be exhaustive, the present invention discloses some numerical values ​​to illustrate the technical solution of the present invention, and the numerical values ​​listed above should not constitute a limitation on the scope of protection of the present invention.

[0063] If the words "first", "second" and so on are used in this article to limit components, those skilled in the art should know that the use of "first" and "second" is only for the convenience of description to distinguish the components. Unless otherwise stated, the above words have no special meaning.

[0064] Meanwhile, if the above invention discloses or involves mutually fixedly connected parts or structural parts, then, unless otherwise stated, the fixed connection can be understood as: a detachable fixed connection (for example, connection using bolts or screws), or as: a non-detachable fixed connection (for example, riveting, welding). Of course, the mutually fixed connection can also be an integrated structure (for example, one-piece manufacturing using a casting process) (except where it is obviously impossible to use an integrated molding process).

[0065] In addition, the terms used in any technical solution disclosed in the present invention to indicate positional relationships or shapes include states or shapes that are similar, similar or close to them unless otherwise stated. Any component provided by the present invention may be assembled from multiple separate components or may be a separate component manufactured by an integrated molding process.

[0066] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the specific implementation methods of the present invention can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the present invention, which should be included in the scope of the technical solution for protection of the present invention.

Claims

1. An insulating protective device fixing assembly, It is characterized in that It includes an insulating protection device body and an outlet pipe; wherein, The outlet pipe is fixedly connected to the motor end cover, a first fixing structure is provided on the insulation protection device body, and a second fixing structure is provided on the outlet pipe, and the first fixing structure is connected with the second fixing structure to at least limit the movement of the insulation protection device body along its axial direction and the rotation around its axis; The first fixing structure and the second fixing structure are connected by a snap connection; The second fixing structure is a hook-shaped structure, and the first fixing structure is a buckling groove matching the second fixing structure.

2. The insulating protection device fixing assembly according to claim 1, It is characterized in that The insulation protection device body is also provided with a limiting groove, and the limiting groove is located at the outer peripheral edge of the insulation protection device body.

3. A motor, It is characterized in that It comprises a motor end cover, a motor stator, a rotor assembly and an insulation protection device fixing assembly as described in any one of claims 1-2; wherein, The motor stator and the insulation protection device body are both arranged in the motor end cover. The motor end cover is provided with a mounting hole, and the outlet pipe is fixedly connected to the mounting hole.

4. The motor according to claim 3, It is characterized in that A first clamping ring and a second clamping ring are provided on the outlet tube, the second fixing structure is provided on the second clamping ring, a clamping groove is formed between the first clamping ring and the second clamping ring, the first clamping ring can pass through the mounting hole to pass through the motor end cover and clamp the outer edge of the mounting hole in the clamping groove so that the outlet tube is fixedly connected to the motor end cover.

5. The motor according to claim 4, It is characterized in that At least the surface of the second clamping ring that contacts the outer edge of the mounting hole is an arc surface.

6. The motor according to claim 3, It is characterized in that The outlet pipe is made of soft rubber.

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