Waterproof mechanism for hub motor of power-assisted bicycle

Abstract

The waterproof mechanism comprises a middle shaft and a motor wire, one end of the middle shaft is provided with a threading hole, the motor wire is fixedly connected with a second sealing plug, the motor wire penetrates through the threading hole, and a cooling coil is arranged around the threading hole. The cooling coil is arranged around the sealant to cool the sealant, during use, the motor shell drives the gear to rotate through the gear ring, and the gear drives the pump blade to rotate through the transmission shaft, so that cooling liquid in the cooling disc and the cooling coil is driven to circularly flow, heat is prevented from being transmitted to the sealant, and the service life of the sealant is prolonged. Therefore, the sealing glue is prevented from being heated and aged, and the sealing performance of the threading hole is not affected.

Description

TECHNICAL FIELD

[0001] The utility model relates to wheel hub motor technical field, concretely relates to a waterproof mechanism for bicycle wheel hub motor of helping hand. BACKGROUND

[0002] Electric vehicles are widely used at home and abroad, among them, the helping hand bicycle is popular, the helping hand bicycle not only has the pedal function of the bicycle, but also has the helping hand function of the electric vehicle, so that the helping hand bicycle does not cause too big burden to the rider, and the helping hand size can be adjusted according to the road condition, which is convenient for users to use. At present, the wheel hub motor is commonly used.

[0003] In the prior art, the wheel hub motor passes through the threading hole in the middle shaft to thread, but it is difficult to seal the threading hole, and in the prior art, the threading hole is sealed by injecting sealing glue into the threading hole, but when the motor is running, heat will be transferred

[0004] Therefore, how to provide a waterproof mechanism for bicycle wheel hub motor of helping hand to solve the problems existing in the prior art is of great significance to its application. UTILITY MODEL CONTENTS

[0005] Therefore, the purpose of the present application is to provide a waterproof mechanism for bicycle wheel hub motor of helping hand to solve the problems.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0007] A waterproof mechanism for bicycle wheel hub motor of helping hand, including middle shaft and motor wire, the one end of the middle shaft is provided with threading hole, the motor wire is fixedly connected with sealing plug no. 2, the motor wire passes through the threading hole, the periphery of the threading hole is provided with cooling coil, the top end of the middle shaft is fixedly connected with pump shell, the pump shell is rotatably connected with transmission shaft, the both ends of the transmission shaft are installed with gear and pump blade respectively, the pump blade is installed in the inside of pump shell, the middle shaft is fixedly connected with cooling disc, the inside of the cooling disc is provided with cooling cavity, the cooling cavity is communicated with pump shell through connecting pipe no. 1, the pump shell and cooling coil are communicated through connecting pipe no. 2, the cooling coil and cooling cavity are communicated through connecting pipe no. 3.

[0008] Preferably, the end of the threading hole is provided with sealing plug no. 1, the motor wire passes through the sealing plug no. 1, the end of the middle shaft is threadedly connected with sealing cover, the sealing cover and sealing plug no. 1 are elastically connected through spring.

[0009] Preferably, the inside of the threading hole forms sealing cavity between sealing plug no. 1 and sealing plug no. 2, the surface of the middle shaft is provided with glue injection hole, the glue injection hole is communicated with the sealing cavity of threading hole.

[0010] Preferably, the middle shaft is rotationally connected with an end cover and a shell, the end cover and the shell are fixedly connected, the middle shaft is fixedly connected with a rotor driving assembly, and an output shaft of the rotor driving assembly is in transmission connection with the end cover through a reduction gear set.

[0011] Preferably, a gear ring is mounted on one side of the shell, and the gear ring is in meshing connection with a gear.

[0012] Compared with the prior art, the utility model has the beneficial effects that:

[0013] The utility model discloses a cooling coil is arranged around the sealant to cool the sealant, when using, the motor shell drives the gear ring to rotate, the gear drives the pump blade to rotate through the transmission shaft, thereby drives the circulation flow of the cooling liquid in the cooling disc and the cooling coil, thereby avoids the heat transfer to the sealant, thereby avoids the heat aging of the sealant, and then influences the sealing property of the threading hole.

[0014] The above description is only a summary of the technical scheme of the application, in order to more clearly understand the technical means of the application, so as to be implemented according to the content of the specification, and in order to make the above and other purposes, characteristics and advantages of the application more obvious and easy to understand, the following will be described in detail with the preferred embodiment of the application and the accompanying drawings.

[0015] According to the detailed description of the specific embodiments of the application in the following text combined with the drawings, those skilled in the art will be more clear about the above and other purposes, advantages and characteristics of the application. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical scheme in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description, and obviously, the drawings in the following description are some embodiments of the application, and those skilled in the art can also obtain other drawings according to these drawings without creating laborious work.

[0017] Figure 1 It is a structural schematic view of the utility model;

[0018] Figure 2 It is the A place enlarged view of Figure 1

[0019] Figure 3 It is the B place enlarged view of Figure 1

[0020] ​​In the figure: 1, the central axis; 2, the reduction gear set; 3, the rotor drive assembly; 4, the end cover; 5, the housing; 6, the threading hole; 7, the motor wire; 8, the heat dissipation disc; 9, the gear ring; 10, the pump shell; 11, the connecting pipe one; 12, the connecting pipe two; 13, the glue injection hole; 14, the pump blade; 15, the transmission shaft; 16, the cooling coil; 17, the gear; 18, the sealing plug one; 19, the spring; 20, the sealing cover; 21, the connecting pipe three; 22, the sealing plug two. DETAILED DESCRIPTION

[0021] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some but not all of the embodiments of the present application. In the following description, specific details such as specific configurations and components are provided only to help a comprehensive understanding of the embodiments of the present application. Therefore, those skilled in the art should understand that various changes and modifications can be made to the described embodiments without departing from the scope and spirit of the present application. In addition, descriptions of known functions and configurations are omitted in the embodiments for clarity and conciseness.

[0022] In addition, reference numerals and / or letters can be repeated in different examples in the present application. Such repetition is for the purpose of simplification and clarity, and does not itself indicate a relationship between the various embodiments and / or arrangements discussed.

[0023] The term "and / or" herein is only used to describe an association relationship of associated objects, and can represent three relationships, for example, A and / or B can represent three cases of existence of A alone, existence of B alone, and existence of A and B at the same time. The term "and" herein is used to describe another association relationship of associated objects, and can represent two relationships, for example, A and B can represent two cases of existence of A alone and existence of A and B. In addition, the character " / " herein generally represents an "or" relationship between the associated objects before and after it.

[0024] It should also be noted that the relationship terms such as first and second and the like used herein are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between the entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion.

[0025] Please refer to Figures 1-3The application provides a waterproof mechanism for a hub motor of an assisted bicycle, which comprises a middle shaft 1 and a motor wire 7, the middle shaft 1 is provided with a threading hole 6 at one end, the motor wire 7 is fixedly connected with a sealing plug 22, the motor wire 7 passes through the threading hole 6, the threading hole 6 is provided with a cooling coil 16, the top end of the middle shaft 1 is fixedly connected with a pump shell 10, the pump shell 10 is rotatably connected with a transmission shaft 15, the transmission shaft 15 is provided with a gear 17 and a pump blade 14 at two ends respectively, the pump blade 14 is arranged in the pump shell 10, the middle shaft 1 is fixedly connected with a cooling disc 8, the cooling disc 8 is provided with a cooling cavity, the cooling cavity is communicated with the pump shell 10 through a connecting pipe 1, the pump shell 10 is communicated with the cooling coil 16 through a connecting pipe 2, and the cooling coil 16 is communicated with the cooling cavity through a connecting pipe 3.

[0026] The end of the threading hole 6 is provided with a sealing plug 18, the motor wire 7 passes through the sealing plug 18, the end of the middle shaft 1 is threadedly connected with a sealing cover 20, and the sealing cover 20 is elastically connected with the sealing plug 18 through a spring 19.

[0027] The inside of the threading hole 6 forms a sealing cavity through the sealing plug 18 and the sealing plug 22, the surface of the middle shaft 1 is provided with a glue injection hole 13, the glue injection hole 13 is communicated with the sealing cavity of the threading hole 6, the sealing glue is injected into the sealing cavity through the glue injection hole 13, and the waterproof sealing of the threading hole is realized.

[0028] The middle shaft 1 is rotatably connected with an end cover 4 and a shell 5, the end cover 4 and the shell 5 are fixedly connected, the middle shaft 1 is fixedly connected with a rotor driving assembly 3, and the output shaft of the rotor driving assembly 3 is in transmission connection with the end cover 4 through a speed reduction gear set 2.

[0029] One side of the shell 5 is provided with a gear ring 9, and the gear ring 9 is in meshing connection with the gear 17.

[0030] In specific use, the output shaft of the rotor driving assembly 3 drives the end cover 4 to rotate through the speed reduction gear set 2, the end cover 4 drives the shell 5 to rotate, the shell 5 drives the gear 17 to rotate through the gear ring 9, the gear 17 drives the pump blade 14 to rotate through the transmission shaft 15, so that the cooling liquid in the cooling disc 8 and the cooling coil 16 is driven to circulate and flow, heat is avoided from being transmitted to the sealing glue, the sealing glue is avoided from being aged by heat, and then the sealing property of the threading hole 6 is affected.

[0031] The above only describes preferred embodiments of the application, and does not limit the protection scope of the application. For those skilled in the art, the application can be variously changed and varied. Any change, modification, replacement, integration and parameter change of the embodiments within the spirit and principle of the application, which can realize the same function without departing from the principle and spirit of the application, falls within the protection scope of the application.

Claims

1. A waterproof mechanism for a hub motor of an assist bicycle, characterized by: Including the central shaft (1) and motor wire (7), one end of the central shaft (1) is provided with a threading hole (6), the motor wire (7) is fixedly connected with a sealing plug two (22), the motor wire (7) passes through the threading hole (6), the threading hole (6) is provided with a cooling coil (16), the top end of the central shaft (1) is fixedly connected with a pump shell (10), the pump shell (10) is rotatably connected with a transmission shaft (15), the transmission shaft (15) is provided with a gear (17) and a pump blade (14) at both ends respectively, the pump blade (14) is installed in the interior of the pump shell (10), the central shaft (1) is fixedly connected with a cooling disc (8), the interior of the cooling disc (8) is provided with a cooling cavity, the cooling cavity is communicated with the pump shell (10) through a connecting pipe one (11), the pump shell (10) and the cooling coil (16) are communicated through a connecting pipe two (12), the cooling coil (16) and the cooling cavity are communicated through a connecting pipe three (21).

2. A waterproof mechanism for a hub motor of a power-assisted bicycle as claimed in claim 1, characterized in that: The end of the threading hole (6) is provided with a sealing plug one (18), the motor wire (7) passes through the sealing plug one (18), the end of the central shaft (1) is threadedly connected with a sealing cover (20), the sealing cover (20) and the sealing plug one (18) are elastically connected through a spring (19).

3. A waterproof mechanism for a hub motor of a power-assisted bicycle as claimed in claim 2, characterized in that: The interior of the threading hole (6) forms a sealed cavity between the sealing plug one (18) and the sealing plug two (22), the surface of the central shaft (1) is provided with a glue injection hole (13), the glue injection hole (13) is communicated with the sealed cavity of the threading hole (6).

4. A waterproof mechanism for a hub motor of a power-assisted bicycle as claimed in claim 3, characterized in that: The central shaft (1) is rotatably connected with an end cover (4) and a shell (5), the end cover (4) and the shell (5) are fixedly connected, the central shaft (1) is fixedly connected with a rotor driving assembly (3), the output shaft of the rotor driving assembly (3) is drivingly connected with the end cover (4) through a speed reduction gear set (2).

5. A waterproofing mechanism for a hub motor of a power assisted bicycle as claimed in claim 4, characterized in that: One side of the shell (5) is provided with a gear ring (9), the gear ring (9) is meshingly connected with the gear (17).

Images