Driving mechanism and electric bicycle

Abstract

The utility model relates to a driving mechanism and an electric bicycle. The driving mechanism comprises a motor driving structure, a differential mechanism and a chain wheel, and a shell of the differential mechanism is connected with the output end of the motor driving structure; the chain wheel is connected with a shell of the differential mechanism and arranged on an output shaft of the differential mechanism in a sleeving mode. By arranging the differential mechanism, the effect that the two hubs obtain different rotating speeds when the electric bicycle turns can be achieved, meanwhile, due to the fact that the shell of the differential mechanism is coupled with the motor driving structure and the chain wheel at the same time, the effect that the rotating speeds of the two hubs are different when the electric bicycle is in a motor driving mode or a pedal power-assisted driving mode can be achieved. The effect that the two hubs obtain different rotating speeds when the electric bicycle turns can be achieved through the differential mechanism.

Description

Technical Field

[0001] The present application relates to the field of electric vehicles, and in particular to a driving mechanism and an electric bicycle. Background Art

[0002] An electric bicycle is a vehicle that uses batteries as auxiliary energy and is based on an ordinary bicycle and is equipped with a motor, controller, battery, throttle, brake handle and other operating components and a display instrument system. Electric bicycles usually have two driving modes: motor drive and pedal power drive. In related technologies, when a three-wheeled or four-wheeled electric bicycle is in operation, there is no differential installed between the two driving rear wheels, which makes it easy to overturn when turning. Utility Model Content

[0003] The present application provides a driving mechanism and an electric bicycle to solve the problem that the electric bicycle has no differential and is prone to overturning when turning.

[0004] In one aspect, the present application provides a driving mechanism, comprising:

[0005] Motor drive structure;

[0006] A differential, the housing of which is connected to the output end of the motor drive structure;

[0007] A sprocket is connected to the housing of the differential and sleeved on an output shaft of the differential.

[0008] Furthermore, it also includes a drive housing, the drive housing is provided with a first accommodating cavity, the motor drive structure is arranged in the first accommodating cavity, and the differential is arranged in the first accommodating cavity;

[0009] The drive housing is provided with two output holes; the housing of the differential has two output sleeves, and the two output shafts of the differential are respectively passed through the two output sleeves; the two output sleeves are respectively movably passed through the output holes;

[0010] The sprocket is located outside the driving housing and is connected to one of the output sleeves.

[0011] Furthermore, the sprocket is threadedly connected to the output sleeve.

[0012] Further, the drive housing includes a main housing, a first end cover and a second end cover, wherein the first end cover and the second end cover are respectively connected to two sides of the main housing to enclose and form the first accommodating cavity;

[0013] Wherein, the first end cover and the main shell are respectively provided with the output hole.

[0014] Furthermore, a first driven gear is disposed on the outer periphery of the housing of the differential, and a first driving gear is disposed at the output end of the motor drive structure, and the first driving gear is meshed with the first driven gear.

[0015] Furthermore, the motor drive structure comprises:

[0016] A motor device, disposed in the first accommodating cavity;

[0017] A reduction gear is arranged in the first accommodating cavity; the reduction gear comprises the first driving gear, the second driven gear and the second driving gear; one end of the second driving gear is connected to the output end of the motor device, and the other end is meshed with the second driven gear; one end of the first driving gear is connected to the second driven gear, and the other end is meshed with the first driven gear.

[0018] Furthermore, a one-way clutch is provided between the second driven gear and the first driving gear.

[0019] Furthermore, the motor device comprises:

[0020] A motor shaft, the motor shaft is rotatably connected to the drive housing, and the second driving gear is spline-connected to the output shaft of the motor shaft;

[0021] a rotor, the rotor being rotatably disposed in the first accommodating cavity and sleeved on the motor shaft;

[0022] A stator is fixedly disposed in the first accommodating cavity and sleeved on the rotor.

[0023] Furthermore, it also includes a control shell, which is connected to the drive shell and enclosed with the drive shell to form a second accommodating cavity, and a controller component is arranged in the second accommodating cavity, and the controller component is electrically connected to the motor drive structure.

[0024] On the other hand, the present application also provides an electric bicycle, comprising:

[0025] A driving mechanism as described above;

[0026] Two wheel hubs, the two wheel hubs are respectively connected to two output shafts of the differential;

[0027] A pedal structure is connected to the sprocket.

[0028] The above technical solution provided by the embodiment of the present application has the following advantages compared with the prior art:

[0029] The driving mechanism provided by the embodiment of the present application includes a motor driving structure, a differential and a sprocket, wherein the housing of the differential is connected to the output end of the motor driving structure; the sprocket is connected to the housing of the differential and is sleeved on an output shaft of the differential. Thus, when the driving mechanism is applied to an electric bicycle, when the motor driving structure is working, the motor driving structure drives the differential to work, and the two output shafts of the differential can be connected to the wheel hubs of the electric bicycle respectively. When the electric bicycle turns, the mechanism that the two wheel hubs rotate at different speeds can be realized through the differential, thereby reducing the risk of the electric bicycle turning over when turning; when the motor driving structure stops working, the sprocket can be driven to rotate by the pedal structure, and since the sprocket is connected to the housing of the differential, the pedal assist can be transmitted to the housing of the differential, and then transmitted to the two output shafts of the differential through the differential, thereby realizing the transmission of power. At the same time, since the differential works under the drive of the sprocket, when turning, the speeds of the two output shafts are different, and then the mechanism that the two wheel hubs rotate at different speeds can be realized through the differential, thereby reducing the risk of the electric bicycle turning over when turning. The present application can achieve the effect of the two wheel hubs obtaining different rotational speeds when the electric bicycle turns by setting a differential. At the same time, since the housing of the differential is coupled to the motor drive structure and the sprocket at the same time, the electric bicycle can achieve the effect of the two wheel hubs obtaining different rotational speeds when the electric bicycle turns through the differential regardless of whether it is in the motor drive mode or the pedal assist drive mode. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The accompanying drawings herein are incorporated in and constitute a part of the specification, illustrate embodiments consistent with the present utility model, and together with the description, are used to explain the principles of the present utility model.

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0032] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0033] Figure 1 A schematic diagram of the structure of a driving mechanism provided in an embodiment of the present application;

[0034] Figure 2 A schematic diagram of the partial structure of an electric bicycle provided in an embodiment of the present application.

[0035] Description of reference numerals:

[0036] 1. Motor drive structure; 11. Motor device; 111. Motor shaft; 112. Rotor; 113. Stator; 12. Speed ​​reduction device; 121. First driving gear; 122. Second driven gear; 123. Second driving gear; 124. One-way clutch;

[0037] 2. Differential; 21. Differential housing; 22. Output sleeve; 23. Differential assembly; 24. First driven gear; 25. Output shaft

[0038] 3. Sprocket;

[0039] 4. drive housing; 41. main housing; 42. first end cover; 43. second end cover;

[0040] 5. Control shell;

[0041] 6. Controller components;

[0042] 7. Wheel hub. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0044] The disclosure below provides many different embodiments or examples for realizing different structures of the present invention. In order to simplify the disclosure of the present invention, the components and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present invention. In addition, the present invention may repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed.

[0045] For ease of description, spatial relative terms may be used herein to describe the relative positional relationship or movement of one element or feature relative to another element or feature as shown in the figure, such as "inside", "outside", "inner side", "outer side", "below", "below", "above", "above", "front", "back", etc. Such spatial relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figure. For example, if the device in the figure undergoes a position flip or a posture change or a motion state change, then these directional indications also change accordingly, for example: an element described as "below other elements or features" or "below other elements or features" will subsequently be oriented as "above other elements or features" or "above other elements or features". Therefore, the example term "below..." may include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions) and the spatial relative descriptors used herein are interpreted accordingly.

[0046] The present application provides a driving mechanism which can be applied to an electric bicycle, in particular a three-wheel or four-wheel electric bicycle, wherein the electric bicycle has two driving wheels which are distributed left and right. The electric bicycle also has a pedal structure so that the user can provide power through pedaling.

[0047] Figure 1 to Figure 2 A driving mechanism provided in an embodiment of the present application includes a motor driving structure 1, a differential 2 and a sprocket 3, wherein a housing 21 of the differential is connected to an output end of the motor driving structure 1; the sprocket 3 is connected to the housing 21 of the differential and is sleeved on an output shaft 25 of the differential 2. When the driving mechanism is applied to an electric bicycle, the hubs 7 of the two driving wheels are respectively connected to the two output shafts 25 of the differential 2, and the pedal structure is connected to the sprocket 3.

[0048] When the driving mechanism is applied to an electric bicycle, when the motor driving structure 1 is working, the motor driving structure 1 drives the differential 2 to work, and the two output shafts 25 of the differential 2 can be respectively connected to the wheel hub 7 of the electric bicycle (the wheel hub 7 of the driving wheel). When the electric bicycle turns, the differential 2 can be used to realize a mechanism in which the two wheel hubs 7 rotate at different speeds, thereby reducing the risk of the electric bicycle turning over when turning; when the motor driving structure 1 stops working, the sprocket 3 can be driven to rotate by the pedal structure. Since the sprocket 3 is connected to the housing 21 of the differential, the pedal assist can be transmitted to the housing 21 of the differential, and then transmitted to the two output shafts 25 of the differential 2 through the differential 2, thereby realizing power transmission. At the same time, since the differential 2 works under the drive of the sprocket 3, when turning, the rotation speeds of the two output shafts 25 are different, and then the differential 2 can be used to realize a mechanism in which the two wheel hubs 7 rotate at different speeds, thereby reducing the risk of the electric bicycle turning over when turning. The present application can achieve the effect of two wheel hubs 7 obtaining different rotational speeds when the electric bicycle turns by setting a differential 2. At the same time, since the differential housing 21 is coupled to the motor drive structure 1 and the sprocket 3 at the same time, the electric bicycle can achieve the effect of two wheel hubs 7 obtaining different rotational speeds when the electric bicycle turns through the differential 2 regardless of whether it is in the motor drive mode or the pedal assist drive mode.

[0049] like Figure 1 As shown, in the technical solution of this embodiment, a drive housing 4 is further included, the drive housing 4 is provided with a first accommodating cavity, the motor drive structure 1 is provided in the first accommodating cavity, and the differential 2 is provided in the first accommodating cavity;

[0050] The drive housing 4 is provided with two output holes; the housing 21 of the differential has two output sleeves 22, and the two output shafts 25 of the differential 2 are respectively penetrated through the two output sleeves 22; the two output sleeves 22 are respectively movably penetrated through the output holes;

[0051] The sprocket 3 is located outside the drive housing 4 and is connected to an output sleeve 22 .

[0052] It can be understood that, by providing the drive housing 4 , on the one hand, a mounting base is provided for the motor drive structure 1 and the differential 2 , and on the other hand, a protection function is provided for the motor drive structure 1 and the differential 2 .

[0053] The sprocket 3 is arranged outside the drive housing 4 to facilitate the connection between the sprocket 3 and the pedal structure, and the output sleeve 22 is passed through the output hole of the drive housing 4 to facilitate the connection between the sprocket 3 and the output sleeve 22, that is, to facilitate the assembly of the sprocket 3 and the differential 2 housing.

[0054] like Figure 1As shown, the differential 2 includes a differential housing 21, and output sleeves 22 are respectively provided on the left and right sides of the differential housing 21. A differential assembly 23 is provided inside the differential housing 21. The differential 2 has two output shafts 25; the two output shafts 25 are respectively passed through the two output sleeves 22 and connected to the differential assembly 23.

[0055] It should be noted that the differential assembly 23 includes parts such as planetary gears and half-axle gears. In the present application, the assembly of the various parts in the differential assembly 23 adopts the assembly method of the existing differential 2, so it will not be repeated here.

[0056] In the technical solution of this embodiment, the sprocket 3 is threadedly connected to the output sleeve 22 .

[0057] It can be understood that the connection and assembly between the sprocket 3 and the output sleeve 22 is achieved through threaded connection, which is simple to operate and easy to install.

[0058] like Figure 1 As shown, in the technical solution of this embodiment, the drive housing 4 includes a main housing 41, a first end cover 42 and a second end cover 43, and the first end cover 42 and the second end cover 43 are respectively detachably connected to the two sides of the main housing 41 to enclose and form a first accommodating cavity; wherein the first end cover 42 and the main housing 41 are respectively provided with output holes. In this way, the first end cover 42 is detachably connected to the main housing 41, and the second end cover 43 is detachably connected to the main housing 41, which can facilitate the assembly and disassembly of the drive mechanism.

[0059] In this embodiment, the first end cover 42 is connected to the main housing 41 by bolts or screws, and the second end cover 43 is connected to the main housing 41 by bolts or screws.

[0060] like Figure 1 As shown, in the technical solution of this embodiment, a first driven gear 24 is provided on the outer periphery of the differential housing 21 , and a first driving gear 121 is provided at the output end of the motor drive structure 1 , and the first driving gear 121 meshes with the first driven gear 24 .

[0061] It can be understood that the purpose of transmitting the power of the motor drive structure 1 to the housing 21 of the differential is achieved through the meshing of the first driven gear 24 and the first driving gear 121 .

[0062] like Figure 1 and Figure 2As shown, in the technical solution of this embodiment, the motor drive structure 1 includes a motor device 11 and a reduction device 12, the motor device 11 is arranged in the first accommodating cavity; the reduction device 12 is arranged in the first accommodating cavity; the reduction device 12 includes a first driving gear 121, a second driven gear 122 and a second driving gear 123; one end of the second driving gear 123 is connected to the output end of the motor device 11, and the other end is meshed with the second driven gear 122; one end of the first driving gear 121 is connected to the second driven gear 122, and the other end is meshed with the first driven gear 24.

[0063] Thus, in the present application, the motor device 11, the reduction device 12 and the differential 2 are all arranged in the first accommodating cavity, that is, the three are integrated in the same drive housing 4, which has lower cost and convenient installation.

[0064] Among them, the motor device 11 provides power to drive the second driving gear 123 to rotate, the second driving gear 123 drives the second driven gear 122 to rotate, the second driven gear 122 drives the first driving gear 121 to rotate, the first driving gear 121 drives the first driven gear 24 to rotate, and the first driven gear 24 drives the differential housing 21, so as to achieve the purpose of transmitting the power output by the motor device 11 to the differential 2 after being processed by the reduction device 12.

[0065] like Figure 1 As shown, in the technical solution of this embodiment, a one-way clutch 124 is provided between the second driven gear 122 and the first driving gear 121 .

[0066] It is understandable that a one-way clutch 124 is provided between the second driven gear 122 and the first driving gear 121 to prevent the motor device 11 from being dragged in reverse in the pedal-assisted driving mode; in this embodiment, the one-way clutch 124 is a wedge-type one-way clutch 124 .

[0067] like Figure 1 As shown, in the technical solution of this embodiment, the motor device 11 includes a motor shaft 111, a rotor 112 and a stator 113. The motor shaft 111 is rotatably connected to the drive housing 4, and the second driving gear 123 is spline-connected to the output shaft 25 of the motor shaft 111; the rotor 112 is rotatably disposed in the first accommodating cavity and is sleeved on the motor shaft 111; the stator 113 is fixedly disposed in the first accommodating cavity and is sleeved on the rotor 112.

[0068] It can be understood that after the stator 113 is energized, it drives the rotor 112 to rotate, and then drives the motor shaft 111 to rotate, and the motor shaft 111 drives the second driving gear 123 to transmit, that is, the motor device 11 configured in this way can provide power after being energized.

[0069] like Figure 1As shown, in the technical solution of this embodiment, it also includes a control shell 5, which is connected to the drive shell 4 and enclosed with the drive shell 4 to form a second accommodating cavity. A controller component 6 is arranged in the second accommodating cavity, and the controller component 6 is electrically connected to the motor drive structure 1.

[0070] It can be understood that the controller assembly 6 is electrically connected to the motor drive structure 1 to control the switch of the motor drive structure 1. In the present application, by connecting the control shell 5 to the drive housing 4, the purpose of integrating the controller into the drive mechanism can be achieved.

[0071] In one embodiment, the motor device 11, the reduction device 12, the differential 2, and the controller are integrated into one, which is convenient for installation.

[0072] On the other hand, Figure 2 As shown, the present application also provides an electric bicycle, including two wheel hubs 7, a pedal structure and the above drive mechanism. The specific structure of the drive mechanism refers to the above embodiment. Since the electric bicycle adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here. Among them, the two wheel hubs 7 are respectively connected to the two output shafts 25 of the differential 2; the pedal structure is connected to the sprocket 3.

[0073] It should be noted that the pedal structure in the present application can adopt the pedal structure in the prior art, which will not be described in detail here.

[0074] It should be understood that the terms used herein are only for the purpose of describing specific example embodiments and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "include", "comprise", "contain", and "have" are inclusive, and therefore specify the existence of stated features, steps, operations, elements and / or parts, but do not exclude the existence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not interpreted as necessarily requiring them to be performed in the specific order described or illustrated, unless the execution order is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0075] Although the terms first, second, third, etc. can be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teaching of the example embodiments.

[0076] The above description is only a specific embodiment of the present invention, so that those skilled in the art can understand or implement the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but should conform to the widest scope consistent with the principles and novel features applied herein.

Claims

1. A driving mechanism, characterized in that: include: Motor drive structure (1); A differential (2), wherein a housing (21) of the differential is connected to an output end of the motor drive structure (1); A sprocket (3), the sprocket (3) is connected to a housing (21) of the differential and is sleeved on an output shaft (25) of the differential (2).

2. The driving mechanism according to claim 1, characterized in that: It also includes a drive housing (4), the drive housing (4) being provided with a first accommodating cavity, the motor drive structure (1) being arranged in the first accommodating cavity, and the differential (2) being arranged in the first accommodating cavity; The drive housing (4) is provided with two output holes; the housing (21) of the differential has two output sleeves (22); the two output shafts (25) of the differential (2) are respectively passed through the two output sleeves (22); the two output sleeves (22) are respectively movably passed through the output holes; The sprocket (3) is located outside the drive housing (4) and is connected to an output sleeve (22).

3. The driving mechanism according to claim 2, characterized in that: The sprocket (3) is threadedly connected to the output sleeve (22).

4. The driving mechanism according to claim 2, characterized in that: The drive housing (4) comprises a main housing (41), a first end cover (42) and a second end cover (43), wherein the first end cover (42) and the second end cover (43) are respectively connected to two sides of the main housing (41) to enclose and form the first accommodating cavity; Wherein, the first end cover (42) and the main shell (41) are respectively provided with the output hole.

5. The driving mechanism according to claim 2, characterized in that: A first driven gear (24) is provided on the outer periphery of the differential housing (21), and a first driving gear (121) is provided at the output end of the motor drive structure (1), and the first driving gear (121) is meshed with the first driven gear (24).

6. The driving mechanism according to claim 5, characterized in that: The motor drive structure (1) comprises: A motor device (11), arranged in the first accommodating cavity; A reduction gear (12) is arranged in the first accommodating cavity; the reduction gear (12) comprises the first driving gear (121), a second driven gear (122) and a second driving gear (123); one end of the second driving gear (123) is connected to the output end of the motor device (11), and the other end is meshed with the second driven gear (122); one end of the first driving gear (121) is connected to the second driven gear (122), and the other end is meshed with the first driven gear (24).

7. The driving mechanism according to claim 6, characterized in that: A one-way clutch (124) is provided between the second driven gear (122) and the first driving gear (121).

8. The driving mechanism according to claim 6, characterized in that: The motor device (11) comprises: A motor shaft (111), the motor shaft (111) being rotationally connected to the drive housing (4), and the second driving gear (123) being spline-connected to an output shaft (25) of the motor shaft (111); a rotor (112), the rotor (112) being rotatably disposed in the first accommodating cavity and sleeved on the motor shaft (111); A stator (113), wherein the stator (113) is fixedly disposed in the first accommodating cavity and sleeved on the rotor (112).

9. The driving mechanism according to any one of claims 2 to 8, characterized in that: The invention also comprises a control shell (5), wherein the control shell (5) is connected to the drive shell (4) and is enclosed with the drive shell (4) to form a second accommodating cavity, wherein a controller component (6) is arranged in the second accommodating cavity, and the controller component (6) is electrically connected to the motor drive structure (1).

10. An electric bicycle, characterized in that: include: A driving mechanism as claimed in any one of claims 1 to 9; Two wheel hubs (7), the two wheel hubs (7) being respectively connected to two output shafts (25) of the differential (2) of the driving mechanism; A pedal structure is connected to a sprocket (3) of the driving mechanism.

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