A power drive system and a two-wheeled electric vehicle

Abstract

The utility model belongs to two -wheeled vehicle power system field, concretely is a kind of power drive system and two -wheeled electric vehicle. One kind of power drive system, including motor, wheel, wheel shaft, gear assembly and seal cover;Wheel is sleeved in the outer circumferential surface of wheel shaft;Seal cover is sleeved on wheel shaft in the side of wheel axial direction, and placing cavity for accommodating gear assembly is equipped in seal cover;Motor is driven and is connected wheel by gear assembly. Gear assembly is placed in seal cover, so that gear assembly is in an independent space and runs, guarantees the stable operation of gear assembly, and it is convenient to oil maintenance and subsequent maintenance to gear assembly.

Description

Technical Field

[0001] This utility model relates to the field of two-wheeled vehicle power systems, and in particular to a power drive system and a two-wheeled electric vehicle. Background Technology

[0002] In existing two-wheeled electric vehicle power drive systems, the motor rotates, and the speed is adjusted via a gear assembly. Power is then transmitted to the wheels via a chain to propel the vehicle. The gear assembly is typically exposed, and during long-term vehicle use, external environmental factors (such as dust and moisture) can easily lead to insufficient lubrication and gear wear, thus affecting vehicle performance. To address the issue of exposed gear assemblies, some improved designs attempt to integrate them into the wheel hub and seal them, forming a closed structure to improve gear assembly stability. However, because the wheel hub is in motion and operates under complex road conditions, this improved design may still face the risk of seal damage due to vehicle movement, potentially affecting the operational stability of the gear assembly. Summary of the Invention

[0003] In order to solve the above-mentioned problems in the prior art, the present invention provides a power drive system and a two-wheeled electric vehicle.

[0004] The first aspect of this application provides a power drive system, including: a motor, a wheel, axle, gear assembly, and a sealing cover;

[0005] The wheel is fitted onto the outer circumferential surface of the axle;

[0006] The sealing cover, located on one side of the wheel axis, is fitted onto the wheel axle, and the sealing cover has a cavity for accommodating the gear assembly;

[0007] The motor drives the wheel via the gear assembly.

[0008] In one embodiment, the sealing cover includes a first sealing shell and a second sealing shell;

[0009] The first sealing shell is sleeved on the wheel axle. The first sealing shell has a first placement cavity inside, and the side of the first sealing shell away from the wheel has a first opening that communicates with the first placement cavity. A first connecting part is provided on the outer periphery of one end of the first sealing shell where the first opening is located.

[0010] The second sealing shell is sleeved on the axle. The second sealing shell has a second placement cavity inside, and a second opening is opened on the side opposite to the first opening. A second connecting part is provided on the outer periphery of one end of the second sealing shell where the second opening is located. The second connecting part is connected to the first connecting part, so that the first placement cavity and the second placement cavity form the placement cavity.

[0011] In one embodiment, the gear set includes a first gear and a second gear;

[0012] The first gear is sleeved on the output shaft of the motor and rotates with the output shaft of the motor;

[0013] The second gear meshes with the first gear, and the second gear drives the wheel.

[0014] In one embodiment, the second gear is sleeved on the axle and fixedly connected to the axle;

[0015] Both ends of the axle are connected to the frame via bearings, and the axle (2) is fixedly connected to the hub.

[0016] In one embodiment, the motor is rotatably mounted on the axle via a bearing, and the motor is fixedly connected to the vehicle frame via a connector.

[0017] In one embodiment, a bearing is installed between the second gear and the axle. The outer ring of the rotating bearing extends radially outward along the bearing and has a retaining ring. The retaining ring is fixedly connected to the second gear. The rotating bearing has a connecting portion that passes through the sealing cover and connects to the wheel on the side near the wheel.

[0018] In one embodiment, the axle passes through the axle hole of the hub and a bearing is provided between them. The two ends of the axle are respectively fixedly connected to corresponding parts of the frame, and the motor is fixedly connected to the axle.

[0019] In one embodiment, at least one transmission gear is provided between the first gear and the second gear.

[0020] In one embodiment, the axes of the first gear and the second gear are the same axis, two parallel axes, or two intersecting axes.

[0021] A second aspect of this application provides a two-wheeled electric vehicle, including the aforementioned power drive system.

[0022] The advantages of this utility model over the prior art are as follows:

[0023] In this application, the gear assembly is placed inside a sealed cover, allowing it to operate in an independent space. This ensures the gear assembly is protected from external dust, moisture, and other contaminants, thereby improving operational stability and extending component life. Furthermore, it facilitates easy lubrication and disassembly for maintenance, eliminating the maintenance inconveniences associated with fully enclosed designs. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a front view schematic diagram of the power drive system in Embodiment 1 according to this application.

[0026] Figure 2 for Figure 1 A schematic diagram of the AA section.

[0027] Figure 3 This is an exploded schematic diagram illustrating an implementation of a power drive system according to this application.

[0028] Figure 4 This is an exploded view of the power drive system in Embodiment 2 as shown in this application.

[0029] Figure 5 This is a perspective view showing the controller installed at a first position in the power drive system, according to this application.

[0030] Figure 6 This is a perspective view showing the controller installed at a second position in the power drive system, according to this application.

[0031] In the diagram: 1. Hub; 2. Axle; 3. Motor; 4. Sealing cover; 41. First sealing shell; 411. First connecting part; 42. Second sealing shell; 421. Second connecting part; 5. Gear assembly; 51. First gear; 52. Second gear; 6. Rotary bearing; 61. Inner ring of bearing; 62. Outer ring of bearing; 621. Connecting part; 63. Retaining ring; 7. Controller; 81. Inner ring of bearing; 62. Outer ring of bearing. Detailed Implementation

[0032] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed herein. This utility model can also be implemented or applied through other different specific embodiments. Various details in this utility model can also be modified or changed according to different viewpoints and application systems without departing from the spirit of this utility model. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0033] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings, so that those skilled in the art can easily implement it. This utility model can be embodied in many different forms and is not limited to the embodiments described herein.

[0034] In the representation of this utility model, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics represented in connection with that embodiment or example, which are included in at least one embodiment or example of this utility model. Furthermore, the specific features, structures, materials, or characteristics represented may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate different embodiments or examples represented in this utility model, as well as features of different embodiments or examples.

[0035] Furthermore, the terms "first" and "second" are used for illustrative purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the representation of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0036] To clearly illustrate this utility model, components unrelated to the description are omitted, and the same or similar constituent elements throughout the specification are given the same reference numerals.

[0037] Throughout the specification, when it is said that a device is "fixed" to another device, this includes not only "direct fixation" but also "indirect fixation" by placing other components in between. Furthermore, when it is said that a device "includes" a certain component, unless otherwise stated otherwise, this does not exclude other components, but rather implies that other components may be included.

[0038] When we say that a device is "above" another device, this can mean that it is directly above the other device, or it can mean that other devices are present in between. Conversely, when we say that a device is "directly" "above" another device, there are no other devices present in between.

[0039] Although not explicitly defined, all terms, including technical and scientific terms used herein, shall have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. Terms defined in commonly used dictionaries shall be further interpreted as having a meaning consistent with relevant technical documents and the content of this present instruction, and shall not be over-interpreted as having an ideal or overly formulaic meaning unless otherwise defined.

[0040] Example 1

[0041] like Figure 1 and Figure 2 As shown, this embodiment provides a power drive system, including: a motor 3, a hub 1, an axle 2, a gear assembly 5, and a sealing cover 4; the hub 1 is sleeved on the outer circumferential surface of the axle 2; the sealing cover 4, located on one side of the hub 1 along the axial direction, is sleeved on the axle 2, and the sealing cover 4 has a cavity for accommodating the gear assembly 5; the motor 3 is driven to connect to the hub 1 through the gear assembly 5.

[0042] In this embodiment, the gear assembly 5 is placed inside the sealing cover 4, allowing the gear assembly 5 to operate in an independent space. This ensures that the gear assembly 5 is not affected by external dust, moisture, etc., thereby improving operational stability and extending the life of components. Furthermore, it facilitates easy lubrication of the gear assembly 5 and makes disassembly and maintenance easier, eliminating the maintenance inconveniences associated with fully enclosed designs.

[0043] like Figure 2 and Figure 3 As shown in the specific example provided in this embodiment, the sealing cover 4 includes a first sealing shell 41 and a second sealing shell 42. The first sealing shell 41 is sleeved on the axle 2, and has a first placement cavity inside. The side of the first sealing shell 41 away from the hub 1 has a first opening communicating with the first placement cavity. A first connecting portion 411 is provided on the outer periphery of one end of the first sealing shell 41 where the first opening is located. The second sealing shell 42 is sleeved on the axle 2, and has a second placement cavity inside. A second opening is provided on the side of the second sealing shell 42 opposite to the first opening. A second connecting portion 421 is provided on the outer periphery of one end of the second sealing shell 42 where the second opening is located. The second connecting portion 421 is connected to the first connecting portion 411, so that the first placement cavity and the second placement cavity form a placement cavity. Specifically, in this embodiment, the first connecting portion 411 and the second connecting portion 421 can be fixedly connected by a snap fastener, screw, or pin. In other embodiments, the first sealing shell 41 and the second sealing shell 42 are fixedly connected by an interference fit or a limiting key, which is not limited here.

[0044] It is understood that the first sealing shell 41 and the second sealing shell 42 are fixed together by the first connecting part 411 and the second connecting part 421. A bearing is provided between the second sealing shell 42 and the wheel axle 2, so that the sealing cover 4 composed of the first sealing shell 41 and the second sealing shell forms a rotatable connection with the wheel axle 2.

[0045] Furthermore, a sealing ring or bearing is provided between the first sealing shell 41 and the wheel axle.

[0046] like Figure 3As shown in the specific example provided in this embodiment, the gear set includes a first gear 51 and a second gear 52; the first gear 51 is sleeved on the output shaft of the motor 3 and rotates with the output shaft of the motor 3; the second gear 52 meshes with the first gear 51 and drives the hub 1. Specifically, in this embodiment, the second gear 52 is sleeved on the axle 2 and fixedly connected to the axle 2; both ends of the axle are connected to the frame through bearings, and the axle is fixedly connected to the hub. It should be noted that the axes of the first gear 51 and the second gear 52 can be the same axis, two intersecting axes (for example, in the engagement of bevel gears, the extensions of their axes are intersecting), or two parallel axes. Anything that can transmit the rotation of the first gear 51 to the second gear 52 is acceptable and is not limited here.

[0047] It is understandable that when the motor 3 is started, the output shaft of the motor 3 rotates, which drives the first gear 51 to rotate. The first gear 51, through the second gear 52 meshing with it, drives the wheel axle 2 to rotate. The rotation of the wheel axle 2 drives the wheel hub 1, which is fixedly connected to it, to rotate.

[0048] In one embodiment disclosed in this application, at least one transmission gear is provided between the first gear 51 and the second gear 52. The transmission ratio or transmission direction between the first gear 51 and the second gear 52 is adjusted by the transmission gear, which is not limited here and can be set according to actual needs.

[0049] like Figure 3 As shown in the specific example provided in this embodiment, the motor 3 is rotatably mounted on the axle 2 via a bearing, and the motor 3 is fixedly connected to the vehicle frame via a connector. Specifically, the motor 3 is connected to the second sealing shell 42, and a bearing is provided between the second sealing shell 42 and the axle 2. The fixed connection between the motor 3 and the second sealing shell 42 is used to ensure that the sealing cover 4 is in a relatively fixed state, ensuring the stable rotation of the axle 2. It should be noted that the bearing between the axle 2 and the second sealing shell 42 allows the axle 2 to rotate relative to the second sealing shell. At the same time, the oil seal structure of the bearing enables the sealing cover 4, which is composed of the second sealing shell 42 and the first sealing shell 41, to form a relatively sealed state, ensuring that the gear assembly 5 inside the cavity is not disturbed by the external environment. In other embodiments, the motor 3 is rotatably mounted on the axle 2 via a bearing, and the motor 3 is fixedly connected to other parts of the vehicle via a connector; this is not limited here. It should be noted that in this embodiment, the motor 3 and the second sealing shell 42 are an integral structure or fixed by welding, riveting, or bolting; this is not limited here.

[0050] like Figure 5 and Figure 6As shown in the specific example provided in this embodiment, the housing of the motor 3 is connected to a controller 7, which is installed at different locations on the motor. It should be noted that the specific connection position between the controller 7 and the motor 3 is not limited and can be set according to actual needs.

[0051] Example 2

[0052] like Figure 4 As shown, this embodiment provides a power drive system, which differs from Embodiment 1 in that a rotating bearing 6 is installed between the second gear 52 and the axle 2. The outer ring 62 of the rotating bearing 6 extends radially outward with a fixing ring 63, which is fixedly connected to the second gear 52. The outer ring 62 of the rotating bearing 6 has a connecting portion 621 that passes through the sealing cover 4 and connects to the hub 1 on the side near the hub 1. In this embodiment, the second gear 52 is connected to the outer ring 61 of the rotating bearing, and the inner ring 61 of the rotating bearing is fixedly sleeved on the bearing. Further, the axle 2 passes through the shaft hole of the hub 1, and a bearing is provided between them. The two ends of the axle 2 are respectively fixedly connected to corresponding parts of the frame, and the motor 3 is fixedly connected to the axle 2. It should be noted that the axes of the first gear 51 and the second gear 52 are the same axis or two parallel axes. It is sufficient to transmit the rotation of the first gear 51 to the second gear 52; no limitation is made here. It is worth mentioning that in this embodiment, the fixing ring 63 and the second gear 52 are fixedly connected by integral molding or welding, etc., which is not limited here.

[0053] It is understandable that when the motor 3 is started, the output shaft of the motor 3 drives the first gear 51 to rotate. The rotation of the first gear 51 drives the second gear 52, which meshes with it, to rotate. There is a bearing between the second gear 52 and the axle 2. The second gear 52 rotates on the axle 2. The rotating second gear 52 transmits power to the hub 1 through the outer ring 62 of the bearing connected to it, driving the hub 1 to rotate, thus completing the power transmission.

[0054] In one embodiment disclosed in this application, a sealing ring is provided between the second sealing shell 42 and the wheel axle 2. The sealing ring is lubricated by gear lubricating oil placed in the placement cavity to reduce the friction between the sealing ring and the wheel axle 2.

[0055] In one embodiment disclosed in this application, at least one transmission gear is provided between the first gear 51 and the second gear 52. The transmission ratio or transmission direction between the first gear 51 and the second gear 52 is adjusted by the transmission gear, which is not limited here and can be set according to actual needs.

[0056] like Figure 5 and Figure 6As shown in the specific example provided in this embodiment, the housing of the motor 3 is connected to a controller 7, which is installed at different locations on the motor. It should be noted that the specific connection position between the controller 7 and the motor 3 is not limited and can be set according to actual needs.

[0057] Example 3

[0058] A second aspect of this application provides a two-wheeled electric vehicle, including the power drive system described in Embodiment 1 or Embodiment 2. In the power drive systems with different transmission methods, the gear assembly 5 is enclosed within a sealing cover 4, preventing damage to the gear assembly 5 under different environments, ensuring stable operation of the power drive system, and thus ensuring stable driving of the two-wheeled electric vehicle. Furthermore, the gear assembly 5 being housed within the sealing cover 4 facilitates maintenance and repair of the gear assembly 5, while also preventing gear oil leakage within the sealing cover 4, ensuring stable long-term operation of the gear assembly 5.

[0059] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the appended claims.

Claims

1. A power drive system, characterized in that, include: Motor (3), hub (1), axle (2), gear assembly (5) and sealing cover (4); The hub (1) is fitted onto the outer circumferential surface of the axle (2); The sealing cover (4) located on one side of the axial direction of the hub (1) is sleeved on the axle (2), and the sealing cover (4) is provided with a placement cavity for accommodating the gear assembly (5); The motor (3) is connected to the hub (1) via the gear assembly (5).

2. The power drive system as described in claim 1, characterized in that, The sealing cover (4) includes a first sealing shell (41) and a second sealing shell (42); The first sealing shell (41) is sleeved on the wheel axle (2). The first sealing shell (41) has a first placement cavity inside, and the side of the first sealing shell (41) away from the wheel hub (1) has a first opening that communicates with the first placement cavity. The outer periphery of one end of the first sealing shell (41) where the first opening is located is provided with a first connecting part (411). The second sealing shell (42) is sleeved on the wheel axle (2). The second sealing shell (42) has a second placement cavity inside, and a second opening is provided on the side opposite to the first opening. A second connecting part (421) is provided on the outer periphery of one end of the second sealing shell (42) where the second opening is located. The second connecting part (421) is connected to the first connecting part (411) so that the first placement cavity and the second placement cavity form the placement cavity.

3. The power drive system as described in claim 1, characterized in that, The gear set includes a first gear (51) and a second gear (52); The first gear (51) is sleeved on the output shaft of the motor (3) and rotates with the output shaft of the motor (3); The second gear (52) meshes with the first gear (51), and the second gear (52) drives the hub (1).

4. The power drive system as described in claim 3, characterized in that, The second gear (52) is sleeved on the axle (2) and is fixedly connected to the axle (2); The two ends of the axle (2) are connected to the frame by bearings, and the axle (2) is fixedly connected to the hub (1).

5. The power drive system as described in claim 4, characterized in that, The motor (3) is rotatably mounted on the axle (2) via a bearing, and the motor (3) is fixedly connected to the frame via a connector.

6. The power drive system as described in claim 3, characterized in that, A rotating bearing (6) is installed between the second gear (52) and the axle (2). The outer ring (62) of the rotating bearing (6) extends radially outward with a fixing ring (63). The fixing ring (63) is fixedly connected to the second gear (52). The outer ring (62) of the rotating bearing (6) near the hub (1) has a connecting part (621) that passes through the sealing cover (4) and is connected to the hub (1).

7. The power drive system as described in claim 6, characterized in that, The axle (2) passes through the axle hole of the hub (1) and a bearing is provided between them. The two ends of the axle (2) are respectively fixedly connected to the corresponding parts of the frame. The motor (3) is fixedly connected to the axle (2).

8. The power drive system according to any one of claims 3 to 7, characterized in that, At least one transmission gear is provided between the first gear (51) and the second gear (52).

9. The power drive system according to any one of claims 3 to 7, characterized in that, The axes of the first gear (51) and the second gear (52) are the same axis, two parallel axes, or two intersecting axes.

10. A two-wheeled electric vehicle, characterized in that, Includes the power drive system as described in any one of claims 1 to 9.

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