Waterproof structure of scooter motor

Abstract

The utility model discloses a scooter motor waterproof structure which comprises a shell and a cover body, two ends of a hub motor main shaft respectively penetrate through the shell and the cover body, an opening end of the shell is provided with an abutting step, the cover body is provided with an abutting boss, the junction of the side wall and the bottom wall of the abutting step is provided with a sealing inclined plane, and the abutting step is provided with an annular sealing gasket with an L-shaped cross section. An arc-shaped sealing curved surface is arranged at the junction of the side wall and the bottom wall of the sealing gasket, after the cover body covers, the outer side of the sealing gasket is attached to the bottom wall, the sealing inclined surface and the side wall of the abutting step, and the inner side of the sealing gasket is attached to the bottom wall and the side wall of the abutting boss. The shell and the cover body are fixed through the screws, after the cover body is tightly covered, the special-shaped sealing gasket is arranged between the shell and the cover body and is pressed, so that the sealing curved surface of the sealing gasket abuts against the sealing inclined surface to be deformed and fills the two sides to increase the attaching tightness, then three-face sealing is formed by the sealing gasket and the attaching face of the side wall and the bottom wall, the sealing effect of the shell is improved to the maximum degree, and the sealing effect of the shell is improved. And water is effectively prevented from damaging the hub motor.

Description

Technical Field

[0001] The utility model relates to a waterproof structure of a hub motor for a scooter, in particular to a waterproof structure of a scooter motor. Background Art

[0002] After the electric scooter uses a hub motor, since there is no need to arrange the motor, reducer or half-axle on the chassis, the chassis of the skateboard can be made flatter and the space on the body can be further increased.

[0003] When electric scooters are driving, they often encounter rainy days, which often cause water to enter and damage the motor. Patent application number CN201020195336.5 discloses a waterproof hub motor, including a hub shell and a motor shaft passing through the hub shell, the hub shell is connected to the motor shaft through a bearing, one end of the motor shaft is provided with a threading hole along its axial direction, a lead wire extends out of the threading hole, and a sealing ring is provided between the outer surface of the lead wire and the inner wall of the threading hole.

[0004] The above patent only provides a sealing ring at the lead-out line, but there is also a risk of water ingress at the connection between the hub and the end cover and the position where the motor shaft passes through. In particular, if the hub leaks, a large amount of water will enter the interior. Utility Model Content

[0005] Based on the disadvantages of poor sealing performance of hub motors in the prior art, which may cause water ingress and damage to the motor, the utility model provides a waterproof structure for a scooter motor.

[0006] The technical solution adopted by the utility model to solve the above technical problems is:

[0007] The waterproof structure of a scooter motor comprises a hollow shell with an opening at one end and a cover body covering the open end of the shell. The hub motor is arranged in the shell and has a main shaft. The two ends of the main shaft respectively pass through the shell and the cover body. An annular abutment step is provided at the open end of the shell, and an annular abutment boss is provided on the cover body. A sealing inclined surface is provided at the junction of the side wall and the bottom wall of the abutment step, and an annular sealing gasket with an L-shaped cross section is provided at the abutment step. An arc-shaped sealing curved surface is provided at the junction of the side wall and the bottom wall of the sealing gasket. After the cover body is closed, the outer side of the sealing gasket abuts against the bottom wall, the sealing inclined surface and the side wall of the abutment step, and the inner side of the sealing gasket abuts against the bottom wall and the side wall of the abutment boss. In this solution, the shell and the cover are fixed by screws. After the cover is closed, a special-shaped sealing gasket is arranged between the shell and the cover and is pressed so that its sealing curved surface is pressed against the sealing inclined surface and deformed and filled on both sides to increase the closeness of the fit, and then forms a three-sided seal with the fitting surfaces of the side wall and the bottom wall, thereby maximizing the sealing effect at the shell.

[0008] Preferably, a circle of annular groove is provided at the root of the boss, and an annular boss is provided on the sealing gasket, and the annular boss extends into the groove after installation. Preferably, the cross-section of the annular boss and the groove is an isosceles trapezoid. The sealing gasket is fixed by inserting the annular boss into the groove, and can be directly installed together with the cover body during installation without displacement.

[0009] Preferably, the housing and the cover are both provided with sealed bearings, and the main shaft passes through and is supported by the two sealed bearings. The sealed bearings provide sealed support for both ends of the main shaft.

[0010] Preferably, the sealed bearing comprises an inner ring, an outer ring sleeved outside the inner ring with a radial spacing, balls arranged between the inner ring and the outer ring, a retainer arranged between the inner ring and the outer ring to limit the position of the balls, and sealing rings are embedded in the gaps at both ends of the inner ring and the outer ring. This type of sealed bearing has a sealing effect and can prevent water from entering the inside of the hub motor housing through the gap between the inner ring and the outer ring.

[0011] Preferably, the main shaft is further provided with a cylindrical cover with an opening, the cylindrical cover is fixed and sealed to the main shaft, the housing and the cover are provided with an annular groove, the opening end of the cylindrical cover extends into the annular groove to cover the leaked bearing inside. This solution covers the structure of the main shaft extending position inside for protection by the middle cylindrical cover, which can reduce water splashing on the side and raindrops directly contacting with the sealed bearing and other structures.

[0012] Preferably, the diameter of the cylindrical cover gradually increases from the fixed end to the open end to form a guide surface on the surface. This solution can guide raindrops when it rains, preventing rainwater from directly penetrating from the main shaft position to the bearing, causing water ingress or rust.

[0013] Preferably, the main shaft includes a first section, a second section and a third section connected in sequence, wherein the diameters of the first section and the third section are larger than the diameter of the second section, and the entire third section and a portion of the second section are hollow structures, and a threading hole is provided on the side wall of the second section, and the power cord passes through the entire second section and a portion of the first section and passes out from the threading hole. The second section has a small diameter, and its caliber passing through the housing and the cover is small, which can reduce the area required to be sealed at this location, and is more conducive to sealing.

[0014] Preferably, a sealing plug is provided inside the third section of the main shaft, and the power line passes through the through hole in the middle of the sealing plug. This solution is a sealing solution for the power line, wherein the sealing plug can be limited by setting an annular installation step inside the main shaft.

[0015] Specifically, the hub motor includes a motor stator, a motor winding, a magnetic steel winding and a brake part which are arranged in a shell, and the motor stator is fixedly connected to the main shaft; the motor winding is wound on the motor stator and fixedly connected to the motor stator; the magnetic steel winding is wound on and fixed to the inner wall of the shell, and is radially spaced apart from the armature winding.

[0016] Compared with the prior art, the advantages of the utility model are as follows: in the present application, the shell and the cover are fixed by screws. After the cover is tightened, a special-shaped sealing gasket is arranged between the shell and the cover, which is pressed so that its sealing curved surface is deformed against the sealing inclined surface and filled on both sides to increase the closeness of the fit, and then forms a three-sided seal with the fitting surfaces of the side wall and the bottom wall, thereby maximizing the sealing effect at the shell and effectively preventing water from entering and damaging the hub motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be described in further detail below in conjunction with the accompanying drawings and preferred embodiments, but those skilled in the art will appreciate that these drawings are drawn only for the purpose of explaining the preferred embodiments and therefore should not be used as a limitation on the scope of the present invention. In addition, unless otherwise specified, the drawings are only schematically representing the composition or structure of the described object and may contain exaggerated displays, and the drawings are not necessarily drawn to scale.

[0018] Figure 1 A perspective view of the present application;

[0019] Figure 2 An exploded view of this application;

[0020] Figure 3 It is a cross-sectional view of the utility model;

[0021] Figure 4 for Figure 3 The enlarged view of point A in the middle;

[0022] Figure 5 It is a schematic diagram of the structure of the abutment surface between the sealing gasket and the shell and the cover;

[0023] In the figure: 10, shell; 101, abutment step; 102, sealing slope; 20, cover body; 201, groove; 30, cylindrical cover body; 301, annular groove; 40, main shaft; 50, sealing plug; 60, sealing bearing; 70, sealing gasket; 701, sealing curved surface; 702, annular boss. DETAILED DESCRIPTION

[0024] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Those skilled in the art will appreciate that these descriptions are only descriptive and exemplary and should not be construed as limiting the protection scope of the present invention.

[0025] It should be noted that like reference numerals denote similar items in the following drawings, and thus, once an item is defined in one drawing, it may not be further defined or explained in subsequent drawings.

[0026] This embodiment mainly describes the title of the scooter motor waterproof structure, which is as follows:

[0027] Main program :

[0028] Waterproof structure of scooter motor, such as Figure 1-5 As shown, it includes a hollow shell 10 with an opening at one end and a cover body 20 covering the open end of the shell 10. The hub motor is arranged in the shell 10 and has a main shaft 40. The two ends of the main shaft 40 respectively pass through the shell 10 and the cover body 20. The open end of the shell 10 is provided with an annular abutment step 101, and the cover body 20 is provided with an annular abutment boss. A sealing inclined surface 102 is provided at the junction of the side wall and the bottom wall of the abutment step 101, and an annular sealing gasket 70 with an L-shaped cross-section is provided at the abutment step 101. An arc-shaped convex sealing curved surface 701 is provided at the junction of the side wall and the bottom wall of the sealing gasket 70. After the cover body 20 is covered, the outer side of the sealing gasket 70 is in contact with the bottom wall of the abutment step 101, the sealing inclined surface 102 and the side wall of the abutment step 101, and the inner side of the sealing gasket 70 is in contact with the bottom wall and the side wall of the abutment boss. In this solution, the shell 10 and the cover 20 are fixed by screws. After the cover 20 is closed, a special-shaped sealing gasket 70 is arranged between the shell 10 and the cover 20 and is pressed so that its sealing curved surface 701 is deformed against the sealing inclined surface 102 and filled on both sides to increase the closeness of the fit, and then forms a three-sided seal with the fitting surfaces of the side wall and the bottom wall, thereby maximizing the sealing effect at the shell 10.

[0029] like Figure 5 As shown, a circle of annular groove 201 is provided at the root of the boss, and an annular boss 702 is provided on the sealing gasket 70. After installation, the annular boss 702 extends into the groove 201. Preferably, the cross-sections of the annular boss 702 and the groove 201 are isosceles trapezoids. The sealing gasket 70 is fixed by inserting the annular boss 702 into the groove 201, and can be directly installed together with the cover body 20 during installation without displacement.

[0030] like Figure 5 As shown, a sealing curved surface 701 and a sealing inclined surface 102 that abut against each other may also be provided between the sealing ring and the cover body 20 .

[0031] Spindle seal part :

[0032] like Figure 2-3As shown, the housing 10 and the cover 20 are both provided with sealed bearings 60, and the main shaft 40 passes through the two sealed bearings 60 and is supported by the two sealed bearings 60. The sealed bearings 60 provide sealed support to both ends of the main shaft 40.

[0033] Preferably, the sealed bearing 60 includes an inner ring, an outer ring sleeved outside the inner ring with a radial spacing, balls arranged between the inner ring and the outer ring, and a retainer arranged between the inner ring and the outer ring to limit the position of the balls, and sealing rings are embedded in the gaps at both ends of the inner ring and the outer ring. This type of sealed bearing 60 has a sealing effect and can prevent water from entering the inside of the hub motor housing 10 through the gap between the inner ring and the outer ring.

[0034] Spindle waterproof protection solution :

[0035] like Figure 1-3 As shown, the main shaft 40 is also provided with a cylindrical cover 30 with an opening, the cylindrical cover 30 is fixed and sealed to the main shaft 40, the housing 10 and the cover 20 are provided with an annular groove 301, and the open end of the cylindrical cover 30 extends into the annular groove 301 to cover the leaked bearing 60 inside. In this solution, the structure of the main shaft 40 extending position is covered inside by the middle cylindrical cover 30 for protection, which can reduce the splashing of water on the side and the direct contact of raindrops with the sealed bearing 60 and other structures.

[0036] Preferably, the diameter of the cylindrical cover 30 gradually increases from the fixed end to the open end to form a guide surface on the surface. This solution can guide raindrops when it rains, preventing rainwater from directly entering the bearing 60 from the main shaft 40 to cause water ingress or rust.

[0037] Spindle power line sealing solution :

[0038] Preferably, the main shaft 40 includes a first section, a second section and a third section connected in sequence, wherein the diameters of the first section and the third section are larger than the diameter of the second section, and the entire third section and a portion of the second section are hollow structures, and the side wall of the second section is provided with a threading hole, and the power cord passes through the entire second section and a portion of the first section and passes out from the threading hole. The second section has a small diameter, and its caliber passing through the housing 10 and the cover 20 is small, which can reduce the area required for sealing at this location, and is more conducive to sealing. It should be noted that the segmented structure of the main shaft 40 in this solution is not shown in the figure.

[0039] like Figure 3 As shown, a sealing plug 50 is provided inside the third section of the main shaft 40, and the power line passes through the middle through hole of the sealing plug 50. This scheme is a sealing scheme for the power line, wherein the sealing plug 50 can be limited by setting an annular installation step inside the main shaft 40.

[0040] Hub motor part :

[0041] Specifically, the hub motor includes a motor stator, a motor winding, a magnetic steel winding and a brake part arranged in a housing 10, wherein the motor stator is fixedly connected to the main shaft; the motor winding is wound on the motor stator and fixedly connected to the motor stator; the magnetic steel winding is wound and fixed on the inner wall of the housing, and is radially spaced from the armature winding. Among them, the brake part is the same as that in the application number CN202311331256.6.

[0042] The above is a detailed introduction to the titles provided by the utility model. Specific examples are used in this article to illustrate the principles and implementation methods of the utility model. The description of the above embodiments is only used to help understand the utility model and its core ideas. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the utility model, the utility model can also be improved and modified. These improvements and modifications also fall within the scope of protection of the claims of the utility model.

Claims

1. A scooter motor waterproof structure, comprising a hollow shell with an opening at one end and a cover body covering the open end of the shell, wherein the hub motor is arranged in the shell and has a main shaft, and the two ends of the main shaft respectively penetrate the shell and the cover body, characterized in that: An annular abutment step is provided at the open end of the shell, an annular abutment boss is provided on the cover body, a sealing slope is provided at the junction of the side wall and the bottom wall of the abutment step, and an annular sealing gasket with an L-shaped cross-section is provided at the abutment step, and an arc-shaped sealing curved surface is provided at the junction of the side wall and the bottom wall of the sealing gasket. After the cover body is closed, the outer side of the sealing gasket abuts against the bottom wall, the sealing slope and the side wall of the abutment step, and the inner side of the sealing gasket abuts against the bottom wall and side wall of the abutment boss.

2. The scooter motor waterproof structure according to claim 1, characterized in that: A circle of annular groove is arranged at the root of the abutting boss, and an annular boss is arranged on the sealing gasket. After installation, the annular boss extends into the groove.

3. The scooter motor waterproof structure according to claim 2, characterized in that: The cross sections of the annular boss and the groove are isosceles trapezoids.

4. The scooter motor waterproof structure according to claim 1, characterized in that: The shell body and the cover body are both provided with sealed bearings, and the main shaft passes through the two sealed bearings and is supported by the two sealed bearings.

5. The scooter motor waterproof structure according to claim 4, characterized in that: The sealed bearing includes an inner ring, an outer ring sleeved outside the inner ring with a radial spacing, balls arranged between the inner ring and the outer ring, and a retaining frame arranged between the inner ring and the outer ring to limit the position of the balls. Sealing rings are embedded in the gaps at both ends of the inner ring and the outer ring.

6. The scooter motor waterproof structure according to claim 4, characterized in that: The main shaft is also provided with a cylindrical cover with an opening, which is fixed and sealed to the main shaft. The shell and the cover are provided with an annular groove, and the opening end of the cylindrical cover extends into the annular groove to cover the leaked bearing inside.

7. The scooter motor waterproof structure according to claim 6, characterized in that: The diameter of the cylindrical cover gradually increases from the fixed end to the open end to form a flow guide surface on the surface.

8. The scooter motor waterproof structure according to claim 1, characterized in that: The main shaft includes a first section, a second section and a third section which are connected in sequence, wherein the diameters of the first section and the third section are larger than the diameter of the second section, and the third section as a whole and part of the second section are hollow structures, and the side wall of the second section is provided with a threading hole, and the power cord passes through the second section as a whole, part of the first section and comes out from the threading hole.

9. The scooter motor waterproof structure according to claim 8, characterized in that: A sealing plug is arranged inside the third section of the main shaft, and a power line passes through a through hole in the middle of the sealing plug.

10. The scooter motor waterproof structure according to claim 1, characterized in that: The hub motor includes a motor stator, a motor winding, a magnetic steel winding and a brake part which are arranged in a shell, wherein the motor stator is fixedly connected to the main shaft; the motor winding is wound on the motor stator and fixedly connected to the motor stator; the magnetic steel winding is wound on and fixed to the inner wall of the shell, and is radially spaced apart from the armature winding.

Images