Rear wheel driving device and electric vehicle

Abstract

The utility model discloses a rear wheel driving device. The rear wheel driving device comprises a vehicle body wheel body driven gear electric driving piece and a battery. Wherein a rear fork connecting piece is arranged at the bottom of the bicycle body; the wheel body is rotatably connected with the rear fork connecting piece through a rotating shaft; the driven gear is arranged on the rotating shaft and connected with the wheel body, and the driven gear can drive the wheel body to rotate synchronously; the electric driving part is arranged at the bottom of the vehicle body, and a driving gear is installed at the output end of the electric driving part and is in transmission connection with the driven gear through a belt body. The battery is electrically connected with the electric driving piece and arranged at the bottom of the vehicle body. According to the electric scooter, the driven gears are installed through the wheel bodies, the electric driving piece is installed at the bottom of the scooter body, the driving gear is installed at the output end of the electric driving piece, the driving gear is in transmission connection with the driven gears through the belt body, the transmission structure is simplified, the component layout is optimized, the weight of the scooter body can be greatly reduced, and therefore the portability of the electric scooter is improved.

Description

Technical Field

[0001] This utility model relates to the field of electric vehicle technology, and in particular to a rear-wheel drive device for an electric scooter and an electric vehicle. Background Technology

[0002] In recent years, with the growth in demand for short-distance travel, electric scooters have gradually become one of the mainstream modes of transportation due to their lightweight and flexible characteristics. Electric-assisted electric scooters, in particular, effectively reduce the physical exertion of riders through motor-assisted drive. However, the rear-wheel drive structure of existing electric scooters still has significant drawbacks, restricting improvements in portability and user experience.

[0003] In traditional electric-assist scooters, the rear-wheel drive typically employs a multi-stage gear or chain drive system. This design requires complex gear sets or chain assemblies, resulting in a bulky and space-consuming overall structure. For example, the transmission components between the motor and the wheel often require additional support frames or reinforcements, further increasing the scooter's weight. These design flaws make it difficult for electric scooters to meet users' urgent needs for lightweight and portable designs. Utility Model Content

[0004] The purpose of this utility model application is to provide a rear-wheel drive device and an electric vehicle, wherein a driven gear is installed on the wheel body, an electric drive component is installed on the bottom of the main body of the vehicle, and a drive gear is installed on the output end of the electric drive component, which is connected to the driven gear through a belt. This simplifies the transmission structure, optimizes the component layout, and can significantly reduce the weight of the vehicle, thereby improving the portability of the electric scooter.

[0005] This application provides a rear-wheel drive device, including:

[0006] The main body of the vehicle has a rear fork connector at the bottom;

[0007] The wheel body is rotatably connected to the rear fork connector via a pivot.

[0008] A driven gear is mounted on the rotating shaft and connected to the wheel body. The driven gear can drive the wheel body to rotate synchronously.

[0009] An electric drive unit is located at the bottom of the vehicle body. A drive gear is installed at the output end of the electric drive unit. The drive gear is connected to the driven gear via a belt.

[0010] The battery is electrically connected to the electric drive unit and is located at the bottom of the vehicle body.

[0011] Furthermore, as a more preferred embodiment of this utility model, the driven gear includes:

[0012] The gear body has meshing teeth evenly distributed on its outer circumference; the gear body has a shaft hole in its middle for inserting a rotating shaft; the gear body has a plurality of first pin holes.

[0013] A plurality of first pin holes are adapted to the plurality of first pin holes, one end of which is inserted into the first pin hole; the wheel body is provided with a plurality of second pin holes adapted to the plurality of synchronous pins, and the other end of the plurality of first pin holes is disposed in the plurality of second pin holes.

[0014] Furthermore, as a more preferred embodiment of this utility model, the vehicle body includes: a vehicle frame;

[0015] A foot pedal assembly, which is connected to the top of the vehicle body frame;

[0016] The rear fork connector includes a first fork body and a second fork body; the first fork body and the second fork body are respectively disposed on the bottom two sides of the vehicle frame.

[0017] Furthermore, as a more preferred embodiment of this utility model, the vehicle body also includes a drive fixing member, the top of which is detachably connected to the bottom of the foot pedal member; one side of the drive fixing member is detachably connected to the electric drive member, and the output end of the electric drive member is axially parallel to the driven gear.

[0018] Furthermore, as a more preferred embodiment of this utility model, the vehicle body also includes a power supply fixing component, the top of which is detachably connected to the foot pedal component;

[0019] The bottom of the power supply fixing component is provided with a positioning groove;

[0020] The top of the battery is provided with a mating part that is adapted to the positioning slot;

[0021] The insertion part is inserted into the positioning slot and is detachably connected to the power supply fixing component.

[0022] Furthermore, as a more preferred embodiment of the present invention, it also includes a folding support leg, which is disposed on one side of the bottom of the vehicle frame.

[0023] Furthermore, as a more preferred embodiment of this utility model,

[0024] First bearing components are respectively installed at both ends of the shaft hole of the wheel body, wherein one side of the first bearing component extends outward from the end of the wheel body; the inner ring of the first bearing component is connected to the shaft.

[0025] The driven gear has a second bearing installed at one end of its shaft hole and a stepped groove adapted to the first bearing at the other end. One side of the first bearing can be inserted into the stepped groove and abut against it. The inner ring of the second bearing is connected to the rotating shaft.

[0026] Furthermore, as a more preferred embodiment of this utility model, the first fork body of the rear fork connector and the inner ring of the other first bearing member are abutted by a first bushing.

[0027] The second fork body of the rear fork connector abuts against the inner ring of the second bearing member via a second bushing.

[0028] Furthermore, as a more preferred embodiment of this utility model, the first fork body and the second fork body of the rear fork connector are respectively provided with rotating connection holes, and the two ends of the rotating shaft extend out of the rotating connection holes respectively. The extended parts are pre-tightened by nuts so that the first fork body and the second fork body of the rear fork connector abut against the first bushing and the second bushing respectively.

[0029] Based on the same inventive concept, this utility model also provides an electric vehicle, including the rear-wheel drive device as described above. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0031] Figure 1 This is a schematic diagram of the overall structure of the electric vehicle equipped with a rear-wheel drive device in this embodiment.

[0032] Figure 2 This is a schematic diagram showing the structure of the rear-wheel drive device in this embodiment.

[0033] Figure 3 This is a schematic diagram of the structure of the electric vehicle battery after it has been disassembled in this embodiment.

[0034] Figure 4 This is a half-section diagram of the rear-wheel drive device in this embodiment.

[0035] Figure label:

[0036] 1-Body body, 11-Rear fork connector, 12-Body frame, 13-Foot pedal, 14-Drive mounting bracket, 15-Power supply mounting bracket, 111-First fork, 112-Second fork, 113-Rotating connection hole, 114-Nut, 151-Positioning slot.

[0037] 2-Wheel body, 21-Second pin hole, 22-First bearing component.

[0038] 3-Driven gear, 31-Gear body, 311-Meshing teeth, 312-Shaft hole, 3121-Stepped groove, 313-First pin hole, 32-Synchronous pin, 33-Second bearing component.

[0039] 4-Electric drive component, 41-Drive gear, 42-Belt body.

[0040] 5 - Battery, 51 - Plug-in part.

[0041] 6-Spindle.

[0042] 7- Folding legs.

[0043] a-First bushing.

[0044] b - Second bushing. Detailed Implementation

[0045] To enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0046] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly set on the other component; when a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to the other component.

[0047] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0048] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" or "several" means two or more, unless otherwise explicitly specified.

[0049] It should be noted that the structures, proportions, sizes, etc., shown in the accompanying drawings of this specification are only used to complement the content disclosed in the specification for those skilled in the art to understand and read, and are not intended to limit the conditions under which this application can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and purposes that this application can produce, should still fall within the scope of the technical content disclosed in this application.

[0050] Example

[0051] This embodiment aims to address the problems of complex rear-wheel drive structures, heavy weight, and poor portability in existing electric scooters. Therefore, referring to... Figure 1-4 As shown, this embodiment provides a rear-wheel drive device and an electric vehicle. A driven gear 3 is installed on the wheel body 2, and an electric drive component 4 is installed on the bottom of the body 1. The output end of the electric drive component 4 is equipped with a drive gear 41, which is connected to the driven gear 3 through a belt body 42. This simplifies the transmission structure, significantly reduces the weight of the vehicle body, and improves the portability of the electric scooter.

[0052] Reference Figure 1 As shown, a rear-wheel drive device includes: a vehicle body 1, a wheel 2, a driven gear 3, an electric drive component 4, and a battery 5. The vehicle body 1 has a rear fork connector 11 at its bottom. The wheel 2 is rotatably connected to the rear fork connector 11 via a shaft 6. The driven gear 3 is mounted on the shaft 6 and connected to the wheel 2, enabling the wheel 2 to rotate synchronously. The electric drive component 4 is located at the bottom of the vehicle body 1, and a drive gear 41 is mounted at its output end. The drive gear 41 is connected to the driven gear 3 via a belt 42. The battery 5 is electrically connected to the electric drive component 4 and is located at the bottom of the vehicle body 1.

[0053] Reference Figure 2 As shown, in some embodiments, the driven gear 3 includes a gear body 31 and a plurality of first pin holes 32. The gear body 31 has evenly distributed meshing teeth 311 on its outer periphery; a shaft hole 312 for inserting the shaft 6 is provided in the middle of the gear body 31; the gear body 31 has a plurality of first pin holes 313; and the belt 42 can be a synchronous belt adapted to the meshing teeth 311. The electric drive component 4 can be a servo motor.

[0054] Multiple first pin holes 32 are adapted to multiple first pin holes 313, with one end inserted into the multiple first pin holes 313; the wheel body 2 is provided with multiple second pin holes 21 adapted to multiple synchronous pins 32, and the other end of the multiple first pin holes 32 is provided in the multiple second pin holes 21.

[0055] Reference Figure 1 and 3 As shown, in some embodiments, the vehicle body 1 includes a vehicle frame 12 and a foot pedal assembly 13. The foot pedal assembly 13 is connected to the top of the vehicle frame 12. The rear fork connector 11 includes a first fork body 111 and a second fork body 112; the first fork body 111 and the second fork body 112 are respectively disposed on both sides of the bottom of the vehicle frame 12. It is understood that the rear fork connector 11 is composed of the first fork body 111 and the second fork body 112, which are symmetrically welded or bolted to both sides of the bottom of the vehicle frame 12.

[0056] It should be noted that the vehicle frame 12 is made of bent aluminum alloy tubing with a hollow circular cross-section. The foot pedal component 13 is fixed to the top of the vehicle frame 12 by bolts or welding, and its surface is covered with an anti-slip rubber layer.

[0057] In some embodiments, the vehicle body 1 further includes a drive fixing member 14, the top of which is detachably connected to the bottom of the foot pedal member 13; one side of the drive fixing member 14 is detachably connected to the electric drive member 4, and the output end of the electric drive member 4 is axially parallel to the driven gear 3.

[0058] Reference Figure 1 and 2 As shown, in some embodiments, the vehicle body 1 also includes a power supply fastener 15, the top of which is detachably connected to the foot pedal component 13.

[0059] The bottom of the power supply fixing component 15 is provided with a positioning groove 151;

[0060] The top of the battery 5 is provided with a mating part 51 that is adapted to the positioning slot 151;

[0061] The insertion part 51 is inserted into the positioning slot 151 and is detachably connected to the power supply fixing part 15.

[0062] Reference Figure 1 and 2 As shown, in some embodiments, a folding support leg 7 is also included, which is disposed on the bottom side of the vehicle frame 12.

[0063] Reference Figure 4As shown, in some embodiments, first bearing members 22 are respectively installed at both ends of the shaft hole of the wheel body 2, wherein one side of the first bearing member 22 extends outward from the end of the wheel body 2; the inner ring of the first bearing member 22 is connected to the rotating shaft 6; a second bearing member 33 is installed at one end of the shaft hole of the driven gear 3, and a stepped groove adapted to the first bearing member 22 is provided at the other end, one side of the first bearing member 22 can be inserted into the stepped groove and abut against the stepped groove, and the inner ring of the second bearing member 33 is connected to the rotating shaft 6. It should be added that both the shaft hole of the wheel body 2 and the shaft hole of the driven gear 3 are provided with stepped grooves 3121 for abutting against the outer ring of the bearing member.

[0064] Reference Figure 1 and 4 As shown, in some embodiments, the first fork body 111 of the rear fork connector 11 abuts against the inner ring of another first bearing member 22 via a first bushing a.

[0065] The second fork body 112 of the rear fork connector 11 abuts against the inner ring of the second bearing 33 via the second bushing b.

[0066] Reference Figure 1 and 4 As shown, in some embodiments, the first fork body 111 and the second fork body 112 of the rear fork connector 11 are respectively provided with rotating connection holes 113, and the two ends of the rotating shaft 6 extend out of the rotating connection holes 113 respectively. The extended parts are pre-tightened by nuts 114 so that the first fork body 111 and the second fork body 112 of the rear fork connector 11 abut against the first bushing a and the second bushing b respectively.

[0067] Reference Figure 1 and 3 As shown, this embodiment also provides a lightweight electric vehicle, including the rear-wheel drive device as described above.

[0068] The electronic devices provided in the embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the embodiments above are only for the purpose of helping to understand this application. Furthermore, those skilled in the art will recognize that, based on the ideas of this application, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A rear wheel drive device characterized by comprising: The utility model relates to a rear wheel drive device, including: Vehicle body main part, bottom is provided with rear fork connecting piece; Wheel body, the wheel body is rotatablely connected with rear fork connecting piece through pivot; Driven gear, be provided with on pivot, driven gear is connected with wheel body, driven gear can drive wheel body synchronous rotation; Electric drive piece, be provided with in the bottom of vehicle body main part, the output end of electric drive piece is installed with driving gear, driving gear is driven gear transmission connection through belt body; Battery, with electric drive piece electricity is connected, battery is provided with in the bottom of vehicle body main part.

2. The rear wheel drive device according to claim 1, characterized by Driven gear includes: Gear main part, the outer periphery of gear main part is uniformly distributed meshing tooth;Gear main part's middle part is provided with the axle hole for pivot insertion;Gear main part is provided with a plurality of first bolt hole; A plurality of synchronous bolts, with a plurality of first bolt hole is adapted, one end is provided in a plurality of first bolt hole;Wheel body is provided with a plurality of second bolt hole with a plurality of synchronous bolts are adapted, the other end of a plurality of synchronous bolts is provided in a plurality of second bolt hole.

3. The rear wheel drive device according to claim 1, characterized by Vehicle body main part includes: Vehicle body frame; Pedal piece, pedal piece is connected with the top of vehicle body frame; Rear fork connecting piece includes first fork body and second fork body;First fork body and second fork body are arranged in the bottom of vehicle body frame two sides respectively.

4. The rear wheel drive device according to claim 3, characterized by Vehicle body main part still includes drive fixed piece, the top of drive fixed piece is detachably connected with the bottom of pedal piece;Drive fixed piece one side is detachably connected with electric drive piece, and the output end of electric drive piece is axial with the axial direction of driven gear parallel.

5. The rear wheel drive device according to claim 3, characterized by Vehicle body main part still includes power supply fixed piece, the top of power supply fixed piece is detachably connected with pedal piece; The bottom of power supply fixed piece is provided with positioning notch; The top of battery is provided with the counterplug part with positioning notch is adapted; The counterplug part inserts positioning notch, and is detachably connected with power supply fixed piece.

6. The rear wheel drive device according to claim 3, characterized by Still include folding support, folding support is arranged in the bottom one side of vehicle body frame.

7. The rear wheel drive device according to claim 1, wherein, Both ends of the axle hole of the wheel body are respectively provided with first bearing members, one side of one of the first bearing members extends outward from the end of the wheel body, and the inner ring of the first bearing member is connected with the pivot; One end of the axle hole of the driven gear is provided with a second bearing member, the other end is provided with a stepped groove matched with the first bearing member, one side of the first bearing member can be inserted into the stepped groove and abut against the stepped groove, and the inner ring of the second bearing member is connected with the pivot.

8. The rear wheel drive device according to claim 7, characterized by The first fork body of the rear fork connecting piece and the inner ring of the other first bearing member are abutted through a first shaft sleeve. The second fork body of the rear fork connecting piece and the inner ring of the second bearing member are abutted through a second shaft sleeve.

9. The rear wheel drive device according to claim 8, characterized by The first fork body and the second fork body of the rear fork connecting piece are respectively provided with a rotating connection hole position, both ends of the rotating shaft respectively extend out of the rotating connection hole position, and the extended part is pre-tightened by a nut, so that the first fork body and the second fork body of the rear fork connecting piece respectively abut against the first shaft sleeve and the second shaft sleeve.

10. An electric vehicle, characterized by comprising: A rear wheel drive device comprising a rear wheel drive device according to any one of claims 1-9.

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