A waterproof and vapor-proof direct current motor

Abstract

The utility model discloses a waterproof and steam -proof direct current motor, including casing, the cover body subassembly of being located on the casing to and be located in the motor main body of casing, be equipped with the seal sleeve and the shaft sleeve between the cover body subassembly and motor main body, the output shaft of motor main body cooperates with the drive groove of setting in the shaft sleeve, the opening side of the drive groove is equipped with the sealing boss rib around the shaft sleeve, the sealing boss rib and the sealing end surface of seal sleeve abutment cooperation, prevent the outside water vapor from entering, the utility model discloses have reliable sealing structure, effectively prevent the outside water vapor or steam and enter the motor inside to thereby improve the service life of motor.

Description

Technical Field

[0001] This utility model relates to the field of DC motor technology, and in particular to a waterproof and steam-proof DC motor. Background Technology

[0002] A DC motor is an electric motor that takes DC electrical energy as input and converts it into mechanical energy. Its core function is to generate torque by the interaction of current and magnetic field through the principle of electromagnetic induction, thereby driving mechanical parts to rotate. DC motors are often used in handheld steam brushes to drive the internal impeller or fan structure, helping steam to flow and be discharged quickly.

[0003] Existing DC motors only have simple protective structures, and the connection between the motor shaft and the housing lacks reliable sealing measures. Steam or condensate can easily seep into the motor from the gaps, causing the motor coils to become damp, the insulation performance to deteriorate, and even short circuits, burnouts, and other faults. Utility Model Content

[0004] The purpose of this invention is to provide a waterproof and steam-proof DC motor with a reliable sealing structure that effectively prevents external water vapor or steam from entering the motor, thereby improving the motor's service life.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a waterproof and steam-proof DC motor, comprising a housing, a cover assembly disposed on the housing, and a motor body disposed within the housing, wherein a sealing sleeve and a bushing are provided between the cover assembly and the motor body, the output shaft of the motor body cooperates with a drive groove disposed within the bushing, and the bushing is provided with a sealing rib around the opening side of the drive groove, wherein the sealing rib abuts against the sealing end face of the sealing sleeve to prevent external moisture from entering.

[0006] By adopting the above technical solution, a reliable seal can be formed between the motor body and the cover assembly, preventing external moisture and steam from entering the motor and avoiding short circuits or performance degradation caused by moisture in the internal coils of the motor, thereby improving the protection level and service life of the motor.

[0007] The present invention is further configured such that: the bushing includes a sleeve, the driving groove is disposed inside the sleeve and extends along the axial direction of the sleeve to form an opening, the sealing rib is disposed on the end face of the opening side of the sleeve, and the sealing rib and the sealing sleeve are interference fit to form a circumferential seal on the opening side of the driving groove.

[0008] By adopting the above technical solution, the output shaft of the motor body can drive the bushing to rotate, thereby driving the impeller to rotate, and the sealing performance is improved by the interference fit between the sealing rib and the sealing sleeve.

[0009] The present invention is further configured such that: a sealing top edge is integrally formed on the sleeve, and the outer side of the sealing top edge extends axially to form a covering edge; a positioning part is provided on the sealing sleeve, and the output shaft of the motor body passes through the positioning part and connects to the sleeve; the sealing rib is provided on the end face of the sealing top edge, and the sealing top edge and the covering edge together cover the surface of the positioning part.

[0010] By adopting the above technical solution, the bushing drives the impeller to rotate, and the waterproof sealing effect is further improved by the sealing top edge and the covering edge.

[0011] The present invention is further configured such that: after the housing and the cover assembly are closed, they form a motor cavity and an air guide cavity that are isolated from each other, and the motor cavity and the air guide cavity are connected through a shaft hole; the sealing sleeve is provided in the motor cavity, and the outer end of the sealing sleeve extends along the axial direction of the motor body to form a sealing side, and the inner side of the sealing side abuts against the motor body.

[0012] By adopting the above technical solution, the sealing sleeve improves the overall sealing performance while also providing shock absorption, reducing the transmission of vibration from the motor body to the cover assembly.

[0013] The cover assembly has a mounting protrusion extending towards the motor cavity, which can be inserted into the motor cavity. The mounting protrusion and the opposite side wall of the motor cavity form an enclosing mounting groove. The sealing side of the sealing sleeve is disposed in the mounting groove, and the outer wall of the sealing side abuts against the mounting protrusion.

[0014] By adopting the above technical solution, the mounting groove formed by the mounting convex edge provides stable limiting and support for the sealing side, improving the stability of the overall structure; on the other hand, this structure effectively reduces the possibility of steam, water vapor and external liquid seeping into the motor cavity along the edge of the cover, further improving the sealing performance of the motor cavity.

[0015] The present invention is further configured such that: the cover assembly is provided with an air inlet and an air outlet communicating with the air guide cavity; an impeller is rotatably arranged inside the air guide cavity; the impeller is connected to the motor body in a transmission manner; the cover assembly includes a motor mounting base and a top cover disposed on the motor mounting base; the mounting protrusion is disposed on the motor mounting base; the air guide cavity is formed between the motor mounting base and the top cover.

[0016] By adopting the above technical solution, the air guide cavity can achieve smooth airflow discharge, which helps to improve the heat dissipation efficiency of the motor. At the same time, the involute structure can further reduce airflow noise.

[0017] The present invention is further configured such that: the motor mounting base is provided with a shaft hole, the bushing passes through the shaft hole, a first mounting inclined surface is formed on the inner wall of the shaft hole, and a second mounting inclined surface is provided on the bushing to cooperate with it, wherein the minimum inner diameter of the first mounting inclined surface is smaller than the maximum outer diameter of the second mounting inclined surface.

[0018] By adopting the above technical solution, the inner diameter of the upper end of the bushing is smaller than the inner diameter of the lower end of the shaft hole, making it easier to install the bushing into the shaft hole from below. At the same time, the smaller inner diameter of the upper end of the shaft hole forms a limiting structure to prevent the bushing from continuing to come off upwards.

[0019] The present invention is further configured such that: the outer edge of the motor mounting base is provided with a first protruding edge and a first step portion formed on its inner side; the outer edge of the top cover is provided with a second protruding edge and a second step portion formed on its outer side; the motor mounting base and the top cover are inserted into each other, the first protruding edge abuts against the second step portion, and the second protruding edge abuts against the first step portion.

[0020] By adopting the above technical solution, the top cover and the motor mounting base are locked together, eliminating the need for the two screw holes in the middle, reducing leakage current, and enhancing the structural strength of the cover assembly.

[0021] The present invention is further configured such that: the top cover is provided with an outer positioning hole, the motor mounting base is provided with an outer positioning groove, and the outer positioning hole and the outer positioning groove are connected by screws; the motor mounting base is provided with an inner positioning hole, the housing is provided with an inner positioning groove, and the inner positioning hole and the inner positioning groove are connected by screws.

[0022] By adopting the above technical solution, the screws ensure the accurate assembly position of the cover, prevent displacement or loosening due to vibration during operation, and improve the stability of the overall structure. In addition, the screws effectively prevent relative rotation between the shell and the fixed seat, further ensuring structural stability and reducing structural loosening or deformation caused by vibration during long-term use.

[0023] The present invention is further configured such that: a limiting post is provided on the motor mounting base, and a limiting hole is provided on the motor body, and the limiting post and the limiting hole are inserted into each other.

[0024] By adopting the above technical solution, the motor body can be stably installed, preventing the motor body from shifting during operation and improving structural stability.

[0025] In summary, this utility model has the following beneficial effects: 1. The tight fit between the sealing sleeve and the sealing ribs on the shaft sleeve forms a reliable sealing structure, effectively preventing external moisture or steam from entering the motor, preventing moisture or short circuits, thereby improving the motor's protection level and service life.

[0026] 2. The sealing sleeve is made of silicone, which not only ensures good sealing performance, but also has elasticity and cushioning effect. It absorbs vibration and reduces noise during motor operation, improving the comfort and stability of the handheld steam brush.

[0027] 3. The motor mounting base fits tightly with the top cover, and with multiple positioning structures, the motor is securely installed inside the handheld steam brush, preventing it from shifting or loosening during operation and improving overall stability. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of this utility model.

[0029] Figure 2 This is an exploded view of this utility model.

[0030] Figure 3 This is a schematic diagram of the structure of the bushing of this utility model.

[0031] Figure 4 This is a cross-sectional view of the motor body after disassembly according to this utility model.

[0032] Figure 5 yes Figure 4 Enlarged view of species A.

[0033] In the diagram: 1. Housing; 11. Inner positioning groove; 12. Motor cavity; 2. Cover assembly; 3. Motor body; 31. Limiting hole; 21. Air inlet; 22. Air outlet; 23. Impeller; 24. Motor mounting base; 241. Shaft hole; 242. First mounting slope; 243. First protruding edge; 244. First step; 245. Outer positioning groove; 246. Inner positioning hole; 247. Limiting post; 248. Mounting protruding edge; 25. Top cover; 251. Outer positioning hole; 26. Air guide cavity; 4. Sealing sleeve; 41. Positioning part; 42. Sealing side; 5. Shaft sleeve; 51. Sealing rib; 52. Sleeve; 521. Drive groove; 53. Sealing top edge; 54. Covering edge; 55. Second mounting slope; 252. Second protruding edge; 253. Second step. Detailed Implementation

[0034] The present invention will be further described below with reference to the accompanying drawings.

[0035] like Figures 1 to 4As shown, the present invention provides a waterproof and steam-proof DC motor, including a housing 1, a cover assembly 2, and a motor body 3 disposed within the housing 1. The cover assembly 2 is installed at one end of the housing 1 to seal the motor body 3 and form a protective structure. After the housing 1 and the cover assembly 2 are closed, a motor cavity 12 and an air guide cavity 26 are formed that are isolated from each other. The motor cavity and the air guide cavity 26 are connected through a shaft hole 241. An air inlet 21 is provided on the cover assembly 2, and an air outlet 22 is provided on one side of the cover assembly 2. An impeller 23 is rotatably installed inside the cover assembly 2. The impeller 23 is drivenly connected to the output shaft of the motor body 3. When the motor is running, the motor body 3 drives the impeller 23 to rotate. External air enters the interior of the cover assembly 2 through the air inlet 21 and is discharged along the direction of the air outlet 22 under the drive of the impeller 23, thereby realizing internal air circulation and heat dissipation.

[0036] like Figures 2 to 5 As shown, a sealing sleeve 4 is provided between the cover assembly 2 and the motor body 3. A bushing 5 is fitted on the output shaft of the motor body 3. The bushing 5 has an annular sealing rib 51. The sealing rib 51 is tightly fitted with the inner wall of the sealing sleeve 4 to form a seal and prevent external moisture or humidity from penetrating into the housing 1, thus avoiding short circuits or performance degradation caused by moisture in the motor coil. The bushing 5 includes a sleeve 52. A drive groove 521 is provided inside the sleeve 52 and extends axially along the sleeve 52 to form an opening. The sealing rib 51 is provided on the end face of the opening side of the sleeve 52. The sealing rib 51 and the sealing sleeve 4 are interference-fitted. To create a circumferential seal on the opening side of the drive groove 521, a sealing top edge 53 is integrally formed on the sleeve 52, and an axially extending covering edge 54 is formed on the outer side of the sealing top edge 53; a positioning part 41 is formed on the outer side of the bushing 5, through which the motor output shaft passes and is tightly connected to the sleeve 52; the sealing top edge 53 and the covering edge 54 together cover the surface of the positioning part 41; the sealing rib 51 is set on the inner side of the sealing top edge 53, further enhancing the sealing effect with the sealing sleeve 4; this structure not only ensures the coaxiality of the impeller 23 drive, but also effectively prevents external moisture from entering the interior from the axial gap.

[0037] like Figures 2 to 5As shown, the cover assembly 2 is provided with an installation protrusion 248 that is inserted into the housing 1. The outer end of the sealing sleeve 4 extends along the direction of the motor body 3 to form a sealing side 42. The inner side of the sealing side 42 is tightly fitted with the outer wall of the motor body 3, and the outer side is tightly fitted with the installation protrusion 248 of the cover assembly 2. This not only improves the overall protection level, but also absorbs vibration during operation, thereby reducing the transmission of vibration from the motor body 3 to the cover assembly 2. The sealing sleeve 4 is preferably made of silicone. Silicone has good elasticity, high temperature resistance and anti-aging properties, and can maintain a stable sealing effect in humid or high temperature environments. It is not easy to deform or harden and fail due to long-term work. At the same time, silicone has excellent shock absorption and buffering characteristics, which can absorb mechanical vibration and impact when the motor is running, reduce noise and improve the overall stability of the equipment operation.

[0038] like Figures 2 to 5 As shown, the cover assembly 2 has a mounting protrusion 248 extending towards the motor cavity 12, which can extend into the motor cavity 12. The mounting protrusion 248 and the opposite side wall of the motor cavity 12 form a mounting groove 13. The sealing side 42 of the sealing sleeve 4 is disposed in the mounting groove 13, and the outer wall of the sealing side 42 abuts against the mounting protrusion 248. The mounting groove 13 formed by the mounting protrusion 248 provides stable limiting and support for the sealing side 42, improving the stability of the overall structure. On the other hand, this structure effectively reduces the possibility of steam, water vapor and external liquid seeping into the motor cavity 12 along the edge of the cover, further improving the sealing performance of the motor cavity 12.

[0039] like Figure 5 As shown, the motor mounting base 24 has a shaft hole 241, and the bushing 5 passes through the shaft hole 241. The inner wall of the shaft hole 241 forms a first mounting inclined surface 242, and the outer side of the bushing 5 has a second mounting inclined surface 55 that mates with it. The minimum inner diameter of the first mounting inclined surface 242 is smaller than the maximum outer diameter of the second mounting inclined surface 55. Since the inner diameter of the upper end of the bushing 5 is smaller than the inner diameter of the lower end of the shaft hole 241, it is easier for the bushing 5 to be installed into the shaft hole 241 from below. At the same time, the smaller inner diameter of the upper end of the shaft hole 241 forms a limiting structure to prevent the bushing 5 from continuing to come off upward.

[0040] like Figure 4 As shown, a first protruding edge 243 and a first stepped portion 244 located on the inner side of the motor mounting base 24 are formed on the outer edge of the top cover 25. A second protruding edge 252 and a second stepped portion 253 located on the outer side of the top cover 25 are provided on the outer edge of the top cover 25. During assembly, the top cover 25 and the motor mounting base 24 are assembled by plugging in. The first protruding edge 243 and the second stepped portion 253 abut against each other, and the second protruding edge 252 and the first stepped portion 244 abut against each other, thereby forming a clamping fastening structure in the radial direction. This structure eliminates the screw hole in the middle, avoiding the risk of leakage and water seepage caused by the screw hole, while enhancing the overall strength and assembly efficiency of the cover assembly 2.

[0041] like Figure 2 As shown, the top cover 25 is provided with an outer positioning hole 251, and the motor mounting base 24 is provided with an outer positioning groove 245. The two are connected to each other by screws. The screws ensure the precise alignment of the cover assembly position, preventing the cover from shifting or loosening due to vibration during motor operation, thus improving overall stability. The motor mounting base 24 is also provided with an inner positioning hole 246, and the housing 1 is provided with a corresponding inner positioning groove 11. The inner positioning hole 246 and the inner positioning groove 11 are connected by screws. The screws can effectively prevent relative rotation between the housing 1 and the motor mounting base 24, further improving the structural reliability of the motor during high-speed or long-term operation.

[0042] like Figure 2 As shown, in addition, the motor mounting base 24 is provided with a limiting post 247 and the motor body 3 is provided with a limiting hole 31. The limiting post 247 and the limiting hole 31 are interlocked. This limiting structure ensures that the motor body 3 can be accurately positioned and remain stable during installation, effectively preventing displacement or swaying during operation, and making the motor run more smoothly.

[0043] The basic working principle of this utility model is as follows: The waterproof and steam-proof DC motor of this utility model is installed in the body of the handheld steam brush. After the motor body 3 is started, the output shaft drives the bushing 5 and the impeller 23 to rotate synchronously. The impeller 23 rotates at high speed in the air guide cavity 26 inside the cover assembly 2, guiding the external air or steam to the air outlet 22 and discharging the steam. During the operation, the sealing sleeve 4 between the motor body 3 and the cover assembly 2 and the sealing rib 51 of the bushing 5 form a reliable sealing interface, preventing external water vapor or steam from entering the motor, thereby preventing the motor body 3 from getting damp and causing short circuits or performance degradation. The silicone sealing sleeve 4 plays an elastic and buffering role during operation, absorbing the impact of vibration from the motor body 3, reducing the transmission of vibration and noise, and improving the stability and comfort of the handheld steam brush during use.

[0044] The above description is only a preferred embodiment of the present utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the claims of the present utility model patent application are included in the scope of the present utility model patent application.

Claims

1. A waterproof and steam-proof DC motor, comprising a housing (1), a cover assembly (2) disposed on the housing (1), and a motor body (3) disposed within the housing (1), characterized in that: A sealing sleeve (4) and a bushing (5) are provided between the cover assembly (2) and the motor body (3). The output shaft of the motor body (3) is engaged with the drive groove (521) provided in the bushing (5). The bushing (5) is provided with a sealing rib (51) around the opening side of the drive groove (521). The sealing rib (51) is tightly engaged with the sealing end face of the sealing sleeve (4) to prevent external moisture from entering.

2. The waterproof and steam-proof DC motor according to claim 1, characterized in that: The bushing (5) includes a sleeve (52), the drive groove (521) is provided in the sleeve (52) and extends axially along the sleeve (52) to form an opening, the sealing rib (51) is provided on the end face of the opening side of the sleeve (52), and the sealing rib (51) and the sealing sleeve (4) are interference fit to form a circumferential seal on the opening side of the drive groove (521).

3. A waterproof and steam-proof DC motor according to claim 2, characterized in that: The sleeve (52) has an integrally formed sealing top edge (53), and the outer side of the sealing top edge (53) extends axially to form a covering edge (54); The sealing sleeve is provided with a positioning part (41), and the output shaft of the motor body (3) passes through the positioning part (41) and is connected to the sleeve (52); The sealing rib (51) is disposed on the end face of the sealing top edge (53), and the sealing top edge (53) and the covering edge (54) together cover the surface of the positioning part (41).

4. A waterproof and steam-proof DC motor according to claim 1, characterized in that: After the housing (1) and the cover assembly (2) are closed, they form a motor cavity (12) and an air guide cavity (26) that are isolated from each other. The motor cavity (12) and the air guide cavity (26) are connected through a shaft hole (241). The sealing sleeve (4) is located inside the motor cavity. The outer end of the sealing sleeve (4) extends along the axial direction of the motor body (3) to form a sealing side (42). The inner side of the sealing side (42) is in close contact with the motor body (3).

5. A waterproof and steam-proof DC motor according to claim 4, characterized in that: The cover assembly (2) has an installation protrusion (248) extending toward the motor cavity (12) and capable of extending into the motor cavity (12). The installation protrusion (248) and the opposite side wall of the motor cavity (12) form an enclosing installation groove (13). The sealing side (42) of the sealing sleeve (4) is disposed in the installation groove (13), and the outer wall of the sealing side (42) abuts against the installation protrusion (248).

6. A waterproof and steam-proof DC motor according to claim 5, characterized in that: The cover assembly (2) is provided with an air inlet (21) and an air outlet (22) that communicate with the air guide cavity (26). An impeller (23) is rotatably arranged inside the air guide cavity, and the impeller (23) is connected to the motor body (3) in a transmission connection. The cover assembly (2) includes a motor mounting base (24) and a top cover (25) disposed on the motor mounting base (24). The mounting protrusion (248) is disposed on the motor mounting base (24). The motor mounting base (24) and the top cover (25) form the air guide cavity (26).

7. A waterproof and steam-proof DC motor according to claim 6, characterized in that: The bushing (5) passes through the shaft hole (241). The inner wall of the shaft hole (241) forms a first mounting inclined surface (242). The bushing (5) is provided with a second mounting inclined surface (55) that cooperates with it. The minimum inner diameter of the first mounting inclined surface (242) is smaller than the maximum outer diameter of the second mounting inclined surface (55).

8. A waterproof and steam-proof DC motor according to claim 6, characterized in that: The outer edge of the motor mounting base (24) is provided with a first protruding edge (243) and a first step portion (244) formed on its inner side; the outer edge of the top cover (25) is provided with a second protruding edge (252) and a second step portion (253) formed on its outer side. The motor mounting base (24) is inserted into the top cover (25), the first protruding edge (243) abuts against the second step (253), and the second protruding edge (252) abuts against the first step (244).

9. A waterproof and steam-proof DC motor according to claim 6, characterized in that: The top cover (25) is provided with an outer positioning hole (251), and the motor mounting base (24) is provided with an outer positioning groove (245). The outer positioning hole (251) and the outer positioning groove (245) are connected by screws. The motor mounting base (24) is provided with an inner positioning hole (246), and the housing (1) is provided with an inner positioning groove (11). The inner positioning hole (246) and the inner positioning groove (11) are connected by screws.

10. A waterproof and steam-proof DC motor according to claim 6, characterized in that: The motor mounting base (24) is provided with a limiting post (247), and the motor body (3) is provided with a limiting hole (31). The limiting post (247) and the limiting hole (31) are inserted into each other.

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