Waterproof and dustproof structure for motor of electric moped

Abstract

The utility model relates to the technical field of waterproof and dustproof motor, and discloses a waterproof and dustproof structure for an electric moped motor, which comprises a motor shaft, the outer wall of the motor shaft is slidably connected with an anti-loose gasket, a sealing cover, a first sealing ring and a front cover in sequence from right to left, and the left side of the sealing cover is internally provided with a clamping groove. The outer wall of the motor shaft is in threaded connection with a fixing nut, a sealing bearing is arranged on the outer wall of the right side of the front cover, third sealing rings are arranged on the outer walls of the left side and the right side of the sealing bearing, and a clamping rod is arranged on the outer wall of the motor shaft between the third sealing ring and the first sealing ring on the right side. According to the utility model, the third sealing rings are installed on the left side and the right side of the sealing bearing, the sealing bearing and the front cover are connected and fastened through the fixing bolts, and the clamping rod is in threaded connection with the motor shaft, the first sealing ring, the sealing cover, the anti-loose gasket and the fixing nut are arranged, so that a waterproof and dustproof structure between the motor shaft and the shaft hole is realized, and maintenance and installation are facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of waterproof and dustproof motors, in particular to a waterproof and dustproof structure for an electric power-assisted bicycle motor. Background Art

[0002] An electric assisted bicycle is a mechatronic vehicle that uses a battery as an auxiliary energy source and is based on an ordinary small car. It is equipped with a motor, controller, battery, handlebar, brake handle and other operating components and a display instrument system.

[0003] Currently, the motors of electric power-assisted bicycles are divided into mid-mounted motors and hub motors. The mid-mounted motor is installed at the five-way position of the frame and transmits power to the rear wheel through a chain. It not only lowers the center of the body and increases the balance and stability of the body, but also improves the climbing ability and provides a better riding experience.

[0004] However, due to the low mounting position of the mid-mounted motor, riding through water or in rainy weather exposes it to increased contact with water stains and dust. Modern motors are designed with waterproof casings to prevent the ingress of water and dust. A dynamic seal is used between the motor shaft and the shaft hole. The installation of this dynamic seal requires a certain level of skill and precision. Strict requirements exist for the installation location and method of the seals. For example, the installation of a mechanical seal requires ensuring the flatness and verticality of the sealing surface. Improper installation can easily lead to seal failure. Furthermore, care must be taken during installation to prevent damage to the seals, such as scratches and extrusion deformation. Utility Model Content

[0005] In order to make up for the above deficiencies, the utility model provides a waterproof and dustproof structure for an electric power-assisted bicycle motor, aiming to improve the problem of the waterproof and dustproof structure between the motor shaft and the shaft hole for easy installation.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a waterproof and dustproof structure for an electric power-assisted bicycle motor, comprising a motor shaft, the outer wall of the motor shaft being slidably connected with an anti-loosening gasket, a sealing cover, a sealing ring 1 and a front cover from right to left in sequence, a card slot being provided inside the left side of the sealing cover, the outer wall of the motor shaft being threadedly connected with a fixing nut, a sealed bearing being provided on the right outer wall of the front cover, a sealing ring 3 being provided on both the left and right outer walls of the sealed bearing, the right side of the sealing ring 3 on the right side being provided on the left side of the sealing cover, a clamping rod being provided on the outer wall of the motor shaft between the sealing ring 3 and the sealing ring 1 on the right side, a fixing bolt 3 being provided inside the sealed bearing, the left end of the fixing bolt 3 passing through the sealing bearing and being threadedly connected to the front cover, the centers of the motor shaft, sealing cover, sealing ring 1, sealing ring 3, the sealed bearing and the front cover being on the same straight line.

[0007] Preferably, the slot and the rod are interlocking structures, a groove is provided at the position where the sealing cover and the motor shaft are in contact, the inner ring wall of the sealing ring 1 is in close contact with the outer wall of the motor shaft, and the outer ring wall of the sealing ring 1 is in close contact with the inner wall of the sealing cover.

[0008] Preferably, there are three fixing bolts three, the sealed bearing includes an outer ring, balls wrapped by the outer ring and an inner ring surrounded by the balls, the fixing bolts three are evenly distributed on the outer ring of the sealed bearing, and grooves are provided on the upper and lower sides of the inner ring of the sealed bearing, and are used to place the sealing ring three.

[0009] Preferably, three fixing bolts 1 are provided inside the front cover and are evenly distributed on the front cover. The left end of the fixing bolt 1 passes through the front cover and is threadedly connected to the heat dissipation frame 2. The outer walls on the left and right sides of the heat dissipation frame 2 are provided with sealing rings 2. The outer walls on the left and right sides of the heat dissipation frame 2 are provided with grooves for placing the sealing rings 2. Three fixing bolts 4 are provided on the heat dissipation frame 2. In the side projection, the sealing ring 2 is located on the inner side of the fixing bolt 4. The interior of the heat dissipation frame 2 is fixedly connected with a rubber pad.

[0010] Preferably, the left end of the fixing bolt four passes through the heat dissipation frame two and is threadedly connected to the casing. Three inner convex plates are fixedly connected to the inside of the casing. The three inner convex plates are evenly distributed inside the casing, and their front projections are on a straight line.

[0011] Preferably, a heat sink 1 is provided on the left outer wall of the casing, and the heat sink 1 and the heat sink 2 have the same structure and component positions. Three fixing bolts 5 are provided inside the heat sink 1, and the right end of the fixing bolt 5 passes through the heat sink 1 and is threadedly connected to the casing.

[0012] Preferably, a back cover is provided on the left side of the heat dissipation frame 1, and three fixing bolts 2 are provided on the back cover and are evenly distributed on the back cover, and the right end of the fixing bolt 2 passes through the back cover and is threadedly connected to the heat dissipation frame 1.

[0013] Preferably, the top of the rear cover is fixedly connected with a wire tube, the inside of the wire tube is fixedly connected with sealant, and the centers of the front cover, the first heat sink frame, the second heat sink frame, the casing, and the rear cover are on the same straight line.

[0014] The utility model has the following beneficial effects:

[0015] 1. In the utility model, the sealing ring 3 is installed on the left and right sides of the sealed bearing, the sealed bearing and the front cover are fastened by the fixing bolts, and the sealing between the motor shaft and the shaft hole is completed by the threaded connection between the clamping rod and the motor shaft, the sealing ring 1, the sealing cover, the anti-loosening gasket and the fixing nut, thereby realizing a waterproof and dustproof structure between the motor shaft and the shaft hole, which is more conducive to maintenance and installation.

[0016] 2. In the present invention, the sealing between the heat sink 2, the heat sink 1 and the housing, the front cover and the rear cover is achieved by the sealing ring 2, and the sealing of the wire tube by the sealant, thereby achieving waterproof and dustproof properties for the motor body and facilitating the disassembly and maintenance of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the three-dimensional structure of the waterproof and dustproof structure for the electric power-assisted bicycle motor proposed by the present invention;

[0018] Figure 2 This is a schematic diagram of the internal structure of the waterproof and dustproof structure for the electric power-assisted bicycle motor proposed in the utility model;

[0019] Figure 3 This is a schematic diagram of the sealing cover mechanism of the waterproof and dustproof structure for the electric power-assisted bicycle motor proposed in the utility model.

[0020] Legend:

[0021] 1. Back cover; 2. Wire tube; 3. Sealant; 4. Heat sink 1; 5. Casing; 6. Heat sink 2; 7. Front cover; 8. Sealed bearing; 9. Sealing cover; 10. Motor shaft; 11. Fixing bolt 1; 12. Fixing bolt 2; 13. Sealing ring 1; 14. Fixing bolt 3; 15. Fixing bolt 4; 16. Inner convex plate; 17. Fixing bolt 5; 18. Sealing ring 2; 19. Rubber pad; 20. Sealing ring 3; 21. Clamping rod; 22. Anti-loosening washer; 23. Fixing nut; 24. Slot. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings of the specification of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] Reference Figure 1-Figure 3The utility model provides an embodiment of a waterproof and dustproof structure for an electric power-assisted bicycle motor, comprising a motor shaft 10, the outer wall of the motor shaft 10 being slidably connected with an anti-loosening gasket 22, a sealing cover 9, a sealing ring 13 and a front cover 7 from right to left in sequence, a card slot 24 being provided inside the left side of the sealing cover 9, the outer wall of the motor shaft 10 being threadedly connected with a fixing nut 23, the right outer wall of the front cover 7 being provided with a sealed bearing 8, the left and right outer walls of the sealed bearing 8 being provided with a sealing ring 3 20, the right side of the right sealing ring 3 20 being provided with a left side of the sealing cover 9, a clamping rod 21 being provided on the outer wall of the motor shaft 10 between the right sealing ring 3 20 and the sealing ring 13, a fixing bolt 3 14 being provided inside the sealed bearing 8, the left end of the fixing bolt 3 14 passing through the sealed bearing 8 and being threadedly connected to the front cover 7, the centers of the motor shaft 10, the sealing cover 9, the sealing ring 13, the sealing ring 3 20, the sealed bearing 8 and the front cover 7 being on the same straight line.

[0024] In this embodiment, Figure 1 9, and tighten the sealing cover 9 to the left until there is no gap between the sealing cover 9 and the bearing 8. At this point, the sealing is completed.

[0025] Reference Figure 1-Figure 3 The card slot 24 and the card rod 21 are a mosaic structure, a groove is provided at the position where the sealing cover 9 and the motor shaft 10 are in contact, the inner ring wall of the sealing ring 13 is in close contact with the outer wall of the motor shaft 10, and the outer ring wall of the sealing ring 13 is in close contact with the inner wall of the sealing cover 9.

[0026] Specifically, the sealing ring 13 is installed in the groove where the motor shaft 10 and the sealing cover 9 fit together, and the sealing cover 9 is pressed to the right so that the clamping rod 21 is clamped into the clamping groove 24. When the motor shaft 10 rotates, the sealing cover 9 is driven to rotate together, thereby blocking water and dust from entering the interior of the motor along the motor shaft 10, thereby achieving the waterproof and dustproof effect of the motor.

[0027] Reference Figure 2There are three fixing bolts 14, the sealed bearing 8 includes an outer ring, balls wrapped by the outer ring and an inner ring surrounded by the balls, the fixing bolts 14 are evenly distributed on the outer ring of the sealed bearing 8, and grooves are provided on the upper and lower sides of the inner ring of the sealed bearing 8, which are used to place the sealing ring 20.

[0028] Specifically, the outer ring of the sealed bearing 8 and the front cover 7 are put together, and the sealed bearing 8 and the front cover 7 are tightly fitted by tightening the fixing bolts 3 14, so that the sealing ring 3 20 on the inner ring and the right side of the front cover 7 are tightly fitted together, thereby achieving the sealing of the inner ring of the sealed bearing 8 and the front cover 7.

[0029] Reference Figure 2 Three fixing bolts 11 are provided inside the front cover 7 and are evenly distributed on the front cover 7. The left end of the fixing bolt 11 passes through the front cover 7 and is threadedly connected to the heat dissipation frame 2 6. The outer walls on both sides of the heat dissipation frame 2 6 are provided with sealing rings 2 18. The outer walls on both sides of the heat dissipation frame 2 6 are provided with grooves for placing the sealing rings 2 18. Three fixing bolts 4 15 are provided on the heat dissipation frame 2 6. In the side projection, the sealing ring 2 18 is located on the inner side of the fixing bolt 4 15. The interior of the heat dissipation frame 2 6 is fixedly connected with a rubber pad 19.

[0030] Specifically, the motor is passed through the interior of the heat sink 26, and the rubber pad 19 is wrapped around the motor to reduce damage to the motor caused by vibration. A sealing ring 218 is installed in the groove on the right side of the heat sink 26, and the front cover 7 and the heat sink 26 are put together. By tightening the fixing bolts 11, the front cover 7 and the heat sink 26 are tightly fitted together, and the sealing ring 218 is pressed, thereby achieving the sealing and installation of the front cover 7 and the heat sink 26.

[0031] Reference Figure 2 The left end of the fixing bolt 15 passes through the heat sink 2 6 and is threadedly connected to the housing 5. Three inner convex plates 16 are fixedly connected to the inside of the housing 5. The three inner convex plates 16 are evenly distributed inside the housing 5, and the front projections are on a straight line.

[0032] Specifically, the motor is passed through the casing 5 and installed on the inner convex plate 16 inside the casing 5. First, another sealing ring 18 is installed on the left side of the heat dissipation frame 6. Then the heat dissipation frame 6 and the casing 5 are put together. By tightening the fixing bolts 15, the heat dissipation frame 6 and the casing 5 are tightly fitted together, and the sealing ring 18 is pressed, thereby achieving the sealing and installation of the heat dissipation frame 6 and the casing 5.

[0033] Reference Figure 2A heat sink 4 is provided on the left outer wall of the casing 5. The heat sink 4 and the heat sink 2 6 have the same structure and component positions. Three fixing bolts 5 17 are provided inside the heat sink 4. The right end of the fixing bolt 5 17 passes through the heat sink 4 and is threadedly connected to the casing 5. Through the fixing bolt 5 17, according to the installation principle of the heat sink 2 6 and the casing 5, the heat sink 4 and the casing 5 are fastened together, completing the installation and sealing of the heat sink 4 and the casing 5.

[0034] Reference Figure 2 A back cover 1 is provided on the left side of the heat dissipation frame 4. Three fixing bolts 2 12 are provided on the back cover 1 and are evenly distributed on the back cover 1. The right end of the fixing bolt 2 12 passes through the back cover 1 and is threadedly connected to the heat dissipation frame 4. First, a sealing ring 2 18 is installed in the groove on the left side of the heat dissipation frame 4, and the back cover 1 and the heat dissipation frame 4 are closed. By tightening the fixing bolts 2 12, the back cover 1 and the heat dissipation frame 4 are tightly fitted together, and the sealing ring 2 18 is compacted to complete the installation and sealing of the back cover 1 and the heat dissipation frame 4.

[0035] Reference Figure 1-Figure 2 The top of the rear cover 1 is fixedly connected to a wire tube 2, the inside of the wire tube 2 is fixedly connected to a sealant 3, the center of the front cover 7, the heat sink 1 4, the heat sink 2 6, the casing 5, and the rear cover 1 are on the same straight line; the power transmission end of the motor is passed through the wire tube 2, and the gap inside the wire tube 2 is sealed with the sealant 3, thereby realizing the waterproof and dustproof structure of the entire motor.

[0036] Working principle: When in use, install the two sealing rings 3 20 in the grooves provided on the left and right sides of the sealing bearing 8 respectively, and install the two sealing rings 2 18 in the grooves provided on the left and right sides of the cooling frame 2 6 and the cooling frame 1 4 respectively. A small amount of butter can be used for tightening and lubrication during the installation process. The sealing bearing 8 is threadedly connected to the front cover 7 through the fixing bolt 3 14. The motor is passed through the casing 5 and fixed with the inner convex plate 16. The cooling frame 1 4 and the cooling frame 2 6 are respectively put on the left and right sides of the motor. The cooling frame 1 4, the cooling frame 2 6 and the casing are fixed and tightened by the fixing bolt 4 15 and the fixing bolt 5 17. Then the front cover 7 is passed through the motor shaft 10 and the clamping rod is fixed. 21 is threadedly installed on the motor shaft 10, and the sealing ring 13 and the sealing cover 9 are passed through the motor shaft 10 to the left in sequence, and the sealing ring 13 is pressed to the right so that the sealing ring 13 is tightly fitted on the motor shaft 10 and the sealing cover 9, and the anti-loosening gasket 22 and the fixing nut 23 are passed through the motor shaft 10 to the left in sequence, and the fixing nut 23 is tightened to the left until there is no gap between the sealing cover 9 and the sealing bearing 8, and finally the back cover 1 and the heat dissipation frame 14 are closed, and the back cover 1 and the heat dissipation frame 14 are tightly fitted by tightening the fixing bolts 2 12, and the sealing ring 2 18 is compacted; at this point, while achieving sealing, the waterproof and dustproof structure between the motor shaft 10 and the shaft hole is more conducive to maintenance and installation.

[0037] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A waterproof and dustproof structure for an electric power-assisted bicycle motor, comprising a motor shaft (10), characterized in that: The outer wall of the motor shaft (10) is slidably connected with an anti-loosening gasket (22), a sealing cover (9), a sealing ring (13) and a front cover (7) in sequence from right to left. A card slot (24) is provided inside the left side of the sealing cover (9). The outer wall of the motor shaft (10) is threadedly connected with a fixing nut (23). The right outer wall of the front cover (7) is provided with a sealing bearing (8). The left and right outer walls of the sealing bearing (8) are both provided with a sealing ring (20). The right side of the sealing ring (20) is provided with a A clamping rod (21) is provided on the outer wall of the motor shaft (10) between the sealing ring three (20) and the sealing ring one (13) on the left side of the sealing cover (9), and a fixing bolt three (14) is provided inside the sealing bearing (8). The left end of the fixing bolt three (14) passes through the sealing bearing (8) and is threadedly connected to the front cover (7). The centers of the motor shaft (10), the sealing cover (9), the sealing ring one (13), the sealing ring three (20), the sealing bearing (8), and the front cover (7) are on the same straight line.

2. The waterproof and dustproof structure for an electric power-assisted bicycle motor according to claim 1, characterized in that: The card slot (24) and the card rod (21) are interlocking structures, a groove is provided at the position where the sealing cover (9) and the motor shaft (10) are in contact, the inner ring wall of the sealing ring (13) is in close contact with the outer wall of the motor shaft (10), and the outer ring wall of the sealing ring (13) is in close contact with the inner wall of the sealing cover (9).

3. The waterproof and dustproof structure for an electric power-assisted bicycle motor according to claim 1, characterized in that: There are three fixing bolts (14), and the sealed bearing (8) includes an outer ring, balls wrapped by the outer ring, and an inner ring surrounded by the balls. The fixing bolts (14) are evenly distributed on the outer ring of the sealed bearing (8), and grooves are provided on both the upper and lower sides of the inner ring of the sealed bearing (8) for placing the sealing ring (20).

4. The waterproof and dustproof structure for an electric power-assisted bicycle motor according to claim 1, characterized in that: The front cover (7) is provided with three fixing bolts (11) inside and evenly distributed on the front cover (7). The left end of the fixing bolt (11) passes through the front cover (7) and is threadedly connected to the heat dissipation frame (6). The outer walls on both sides of the heat dissipation frame (6) are provided with sealing rings (18). The outer walls on both sides of the heat dissipation frame (6) are provided with grooves for placing the sealing rings (18). The heat dissipation frame (6) is provided with three fixing bolts (15). In the side projection, the sealing rings (18) are located on the inner side of the fixing bolts (15). The interior of the heat dissipation frame (6) is fixedly connected with a rubber pad (19).

5. The waterproof and dustproof structure for the electric power-assisted bicycle motor according to claim 4, characterized in that: The left end of the fixing bolt 4 (15) passes through the heat dissipation frame 2 (6) and is threadedly connected to the housing (5). Three inner convex plates (16) are fixedly connected to the interior of the housing (5). The three inner convex plates (16) are evenly distributed inside the housing (5) and their front projections are on a straight line.

6. The waterproof and dustproof structure for the electric power-assisted bicycle motor according to claim 5, characterized in that: A heat dissipation frame 1 (4) is provided on the left outer wall of the casing (5). The heat dissipation frame 1 (4) and the heat dissipation frame 2 (6) have the same structure and component positions. Three fixing bolts 5 (17) are provided inside the heat dissipation frame 1 (4). The right end of the fixing bolt 5 (17) passes through the heat dissipation frame 1 (4) and is threadedly connected to the casing (5).

7. The waterproof and dustproof structure for the electric power-assisted bicycle motor according to claim 6, characterized in that: A rear cover (1) is provided on the left side of the heat dissipation frame (4), and three fixing bolts (12) are provided on the rear cover (1) and are evenly distributed on the rear cover (1). The right end of the fixing bolt (12) passes through the rear cover (1) and is threadedly connected to the heat dissipation frame (4).

8. The waterproof and dustproof structure for the electric power-assisted bicycle motor according to claim 7, characterized in that: The top of the rear cover (1) is fixedly connected to a wire tube (2), the interior of the wire tube (2) is fixedly connected to a sealant (3), and the centers of the front cover (7), the first heat sink (4), the second heat sink (6), the housing (5), and the rear cover (1) are on the same straight line.

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