Motor assembly and kart

Abstract

The motor assembly comprises a front end cover, a machine barrel, a rear end cover and a motor shaft, the front end cover is arranged at one end of the machine barrel, the rear end cover is arranged at the other end of the machine barrel, the motor shaft penetrates through the rear end of the machine barrel and extends into the rear end cover, and the other end of the motor shaft extends into the front end cover and penetrates through the front end cover; wherein the surfaces of the front end cover, the machine barrel and the rear end cover are streamlined so as to realize heat dissipation of the motor assembly. The outer surfaces of the front end cover, the machine barrel and the rear end cover are streamlined, and the streamlined design is easier to dissipate heat mainly because the air flow resistance can be reduced, and the air volume and the heat dissipation efficiency are improved. According to the streamline front end cover, the machine barrel and the rear end cover, air flow is smoother by optimizing the aerodynamic principle, and therefore heat transfer and dissipation are accelerated. In addition, the streamline design can prevent hot air from being accumulated in the equipment, and the heat dissipation effect is further improved.

Description

Technical Field

[0001] This utility model relates to the field of go-kart technology, and in particular to a motor assembly and a go-kart. Background Technology

[0002] With the booming development of new energy motors and electric drive technologies, and the vigorous promotion of energy conservation and emission reduction, the demand for recreational go-karts to evolve from internal combustion engines to brushless permanent magnet DC motors with stepless speed regulation is becoming increasingly prominent.

[0003] Go-karts driven by brushless permanent magnet DC motors offer advantages over fuel-powered vehicles, including lower vibration and noise, higher integration, lighter weight, and superior acceleration and handling performance, making them increasingly popular with customers. However, as the application of brushless motors becomes more widespread, current motors used in these applications inevitably have shortcomings in fully meeting customer needs. Among these, motor heat dissipation is a current pain point in the market. Utility Model Content

[0004] The embodiments of this utility model provide a motor assembly and a go-kart, which solves the technical problem of poor motor heat dissipation in traditional go-karts.

[0005] To address the aforementioned problems, according to one aspect of this application, an embodiment of the present invention provides a motor assembly comprising a front cover, a barrel, a rear cover, and a motor shaft. The front cover is disposed at one end of the barrel, and the rear cover is disposed at the other end of the barrel. The motor shaft passes through the barrel, with one end extending into the rear cover and the other end extending into and passing through the front cover. The surfaces of the front cover, the barrel, and the rear cover are all streamlined to facilitate heat dissipation of the motor assembly.

[0006] In some embodiments, the motor assembly further includes a motor assembly disposed within the casing, the motor assembly including a rotor and a stator, the rotor being located within the stator, and the magnetic poles of the rotor being distributed in a block-like pattern.

[0007] In some embodiments, the motor assembly further includes a gear assembly, which includes a housing cover, a transmission unit, and a sealing gasket. The housing cover engages with the front cover via the sealing gasket, and the transmission unit is located in the space formed by the housing cover, the sealing gasket, and the front cover.

[0008] In some embodiments, the transmission unit includes a driving wheel, a driven wheel, and an output gear shaft. The driving wheel is connected to the motor shaft, the driven wheel meshes with the driving wheel, the driven wheel is sleeved on the output gear shaft, and the output gear shaft is disposed on the front end cover.

[0009] In some embodiments, the grease layers applied to the driving gear and the driven gear; and / or the shaft extension of the output gear shaft has symmetrically distributed planes.

[0010] In some embodiments, a first skeleton oil seal is installed on the box cover to seal the space.

[0011] In some embodiments, the box cover, the sealing gasket, and the front cover are fixed by a locating pin, the locating pin comprising a hollow sleeve and a bolt, the bolt engaging with the sleeve.

[0012] In some embodiments, a second skeleton oil seal is installed on the bearing shell of the front end cover, the second skeleton oil seal being used to isolate the motor assembly from the gear assembly.

[0013] In some embodiments, the motor assembly further includes a mounting base plate connected to the barrel by fasteners; and / or the outer side of the barrel is provided with a semi-circular mounting groove.

[0014] According to another aspect of this application, an embodiment of the present invention provides a go-kart that includes the motor assembly described above.

[0015] Compared with the prior art, the motor assembly of this utility model has at least the following beneficial effects:

[0016] The motor assembly provided by this utility model includes a front cover, a barrel, a rear cover, and a motor shaft. The front cover is disposed at one end of the barrel, and the rear cover is disposed at the other end of the barrel. The motor shaft passes through the barrel, with one end extending into the rear cover and the other end extending into and passing through the front cover. The surfaces of the front cover, the barrel, and the rear cover are all streamlined to achieve heat dissipation of the motor assembly.

[0017] In this invention, the outer surfaces of the front cover, the barrel, and the rear cover are all streamlined. The streamlined design facilitates heat dissipation primarily because it reduces airflow resistance, increasing airflow and heat dissipation efficiency. The streamlined front cover, barrel, and rear cover optimize aerodynamics, allowing for smoother airflow and accelerating heat transfer and dissipation. Furthermore, the streamlined design prevents hot air from accumulating inside the equipment, further enhancing heat dissipation.

[0018] The go-kart provided by this utility model is designed based on the above-mentioned motor assembly. Its beneficial effects are the same as those of the above-mentioned motor assembly, and will not be repeated here.

[0019] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a cross-sectional view of a motor assembly provided in an embodiment of this utility model;

[0022] Figure 2 This is a schematic diagram of the structure of a motor assembly provided in an embodiment of this utility model;

[0023] Figure 3 This is a schematic diagram of a motor assembly from another angle, provided by an embodiment of this utility model;

[0024] Figure 4 This is a schematic diagram of the internal structure of a motor assembly provided by an embodiment of the present invention;

[0025] Figure label:

[0026] 1. Front cover; 11. Second skeleton oil seal; 2. Barrel; 21. Mounting groove; 3. Rear cover; 4. Motor shaft; 5. Motor assembly; 51. Rotor; 52. Stator; 6. Gear assembly; 61. Housing cover; 62. Transmission unit; 63. Sealing gasket; 64. First skeleton oil seal; 65. Positioning pin; 621. Driving wheel; 622. Driven wheel; 623. Output gear shaft; 624. Flat surface; 651. Sleeve; 652. Bolt; 7. Mounting base plate. Detailed Implementation

[0027] To further illustrate the technical means and effects adopted by this utility model to achieve its intended purpose, the specific implementation methods, structures, features, and effects according to this utility model application are described in detail below with reference to the accompanying drawings and preferred embodiments. In the following description, different "an embodiment" or "an embodiment" do not necessarily refer to the same embodiment. Furthermore, specific features, structures, or characteristics in one or more embodiments can be combined in any suitable form.

[0028] In the description of this utility model, it should be clarified that the terms "first," "second," etc., in the specification, claims, and drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence; the terms "vertical," "lateral," "longitudinal," "front," "back," "left," "right," "up," "down," "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing this utility model, and do not mean that the device or element referred to must have a specific orientation or position, and therefore should not be construed as a limitation of this utility model.

[0029] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0030] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0031] Example 1

[0032] This embodiment provides a motor assembly, such as Figures 1-4 As shown, the motor assembly includes a front cover 1, a barrel 2, a rear cover 3, and a motor shaft 4. The front cover 1 is disposed at one end of the barrel 2, and the rear cover 3 is disposed at the other end of the barrel 2. The motor shaft 4 passes through the barrel 2, with one end extending into the rear cover 3 and the other end extending into and passing through the front cover 1. The surfaces of the front cover 1, the barrel 2, and the rear cover 3 are all streamlined to achieve heat dissipation of the motor assembly.

[0033] More specifically, the barrel 2 is a hollow cylindrical structure containing a motor assembly. To protect the motor assembly, a front cover 1 and a rear cover 3 are respectively provided at both ends of the barrel 2. The motor shaft 4 is located in the center of the barrel 2, extending axially into the rear cover 3 at one end and into and through the front cover 1 at the other end.

[0034] Motors generate a significant amount of heat during operation. If this heat cannot be dissipated in time, the internal temperature of the motor will rise. High temperatures can damage the motor's insulation materials, bearings, and other components, thereby shortening the motor's lifespan and reducing its performance. To address this, in this embodiment, the outer surfaces of the front cover 1, the barrel 2, and the rear cover 3 are all streamlined. Streamlined design facilitates heat dissipation primarily because it reduces airflow resistance, increasing airflow and heat dissipation efficiency. The streamlined front cover 1, barrel 2, and rear cover 3 optimize aerodynamics, allowing for smoother airflow and accelerating heat transfer and dissipation. Furthermore, the streamlined design prevents hot air from accumulating inside the equipment, further enhancing heat dissipation.

[0035] In a specific embodiment, the motor assembly further includes a motor assembly 5, which is disposed inside the casing 2. The motor assembly 5 includes a rotor 51 and a stator 52. The rotor 51 is located inside the stator 52, and the magnetic poles of the rotor 51 are distributed in a block shape.

[0036] More specifically, the rotor 51 and stator 52 cooperate through electromagnetic interaction. The stator 52 is the stationary part of the motor, consisting of an iron core and windings, and its main function is to generate a rotating magnetic field; while the rotor 51 is the rotating part of the motor, usually consisting of an iron core, windings and a shaft, and its function is to rotate under the magnetic field generated by the stator 52, thereby converting electrical energy into mechanical energy.

[0037] This embodiment emphasizes that the magnetic poles of rotor 51 are distributed in a block-like pattern. This arrangement is beneficial for heat dissipation, mainly because this structure reduces eddy current losses, thereby reducing heat generation. For example, by dividing the permanent magnets into blocks, eddy current density can be effectively reduced, eddy current losses can be decreased, and thus the rotor temperature can be lowered. In addition, the block-like distribution of magnetic poles can improve the magnetic field distribution in the air gap, making it easier for heat to be carried away by airflow and improving heat dissipation efficiency. This structure also helps to form better airflow during rotation, further enhancing the heat dissipation effect.

[0038] In a specific embodiment, the motor assembly further includes a gear assembly 6, which includes a housing cover 61, a transmission unit 62, and a sealing gasket 63. The housing cover 61 cooperates with the front cover 1 through the sealing gasket 63, and the transmission unit 62 is located in the space formed by the housing cover 61, the sealing gasket 63, and the front cover 1.

[0039] The general outline of the box cover 61 is a columnar structure with a sealed top surface. Inside, there is a first space divided for setting up the conveyor unit 62. The sealing gasket 63 is a circular structure with an opening on its inner upper part for the conveyor unit 62 to pass through. In this way, the first space of the box cover 61, the hole on the sealing gasket 63, and the front cover 1 are fitted together to form an axially sealed space, in which the conveyor unit 62 is set.

[0040] In a specific embodiment, the transmission unit 62 includes a driving wheel 621, a driven wheel 622, and an output gear shaft 623. The driving wheel 621 is connected to the motor shaft 4, the driven wheel 622 meshes with the driving wheel 621, and the driven wheel 622 is sleeved on the output gear shaft 623, which is mounted on the front end cover 1. The driving wheel 621, driven wheel 622, and output gear shaft 623 transmit force through gear meshing. The driving wheel 621 transmits power to the driven wheel 622 through rotation, and the driven wheel 622 then transmits power to the output gear shaft 623.

[0041] In a specific embodiment, a grease layer is applied to the driving wheel 621 and the driven wheel 622;

[0042] The grease layer reduces friction and wear between the driving gear 621 and the driven gear 622: Gears generate friction during meshing, and applying grease effectively reduces this friction, thereby slowing down gear wear. This helps extend gear life and maintain good operational performance. It also reduces noise: Grease not only reduces direct contact between mechanical parts but also forms an insulating film during gear operation, reducing noise generated by friction. Furthermore, the grease layer ensures the driving gear 621 and the driven gear 622 maintain flexibility and stability: Grease ensures gears and other transmission components maintain flexibility and stability during operation, preventing jamming or abnormal vibration caused by dry friction. It also prevents corrosion: Grease isolates the gears from air and moisture, preventing corrosion on the gear surface due to oxidation or moisture intrusion, thus extending gear life.

[0043] In this embodiment, the grease layer applied to the drive wheel 621 and driven wheel 622 plays a crucial protective role in the mechanical transmission system, significantly improving the equipment's operating efficiency and lifespan. Furthermore, since the drive wheel 621 and driven wheel 622 are located within the sealed space formed by the housing cover 61, the sealing gasket 63, and the front cover 1, the grease on the drive wheel 621 and driven wheel 622 is effectively prevented from leaking out.

[0044] The output gear shaft 623 has symmetrically distributed planes 624 on its shaft extension. Specifically, the shaft extension of the output gear shaft 623 is a columnar structure, and two planes 624 are machined on both sides of the columnar structure. These planes 624 are used to mount sprockets or other transmission components.

[0045] In a specific embodiment, a first skeleton oil seal 64 is installed on the cover 61 to seal the space. The skeleton oil seal typically consists of an oil seal body, a reinforcing skeleton, and a self-tightening helical spring. The reinforcing skeleton not only enhances the strength and wear resistance of the oil seal but also helps maintain its shape and tension, thereby improving the sealing effect. The skeleton oil seal achieves sealing through the elastic deformation of the rubber, the supporting effect of the metal skeleton, and the principle of friction sealing.

[0046] In this embodiment, by installing a first skeleton oil seal 64 on the box cover 61, the sealing of the transmission unit 62 is ensured, the leakage of the grease applied to the drive wheel 621 and the driven wheel 622 is prevented, and external impurities are prevented from affecting the cooperation effect of the drive wheel 621 and the driven wheel 622.

[0047] In a specific embodiment, the box cover 61, the sealing gasket 63 and the front cover 1 are fixed by a positioning pin 65. The positioning pin 65 includes a hollow sleeve 651 and a bolt 652, and the bolt 652 cooperates with the sleeve 651.

[0048] The bolt 652 and the sleeve 651 cooperate to form a hollow sleeve-shaped locating pin, which can achieve a certain self-adaptive effect after the working temperature rises. Specifically, the sleeve 651 and the bolt 652 are made of elastic materials, which can absorb thermal expansion through their own elastic deformation when the temperature rises, thereby adapting to the dimensional changes caused by temperature changes. In addition, the design of some locating pins also takes into account the parallelism of the thermal expansion direction to reduce the impact of thermal expansion on positioning accuracy.

[0049] In a specific embodiment, a second skeleton oil seal 11 is installed on the bearing outer surface of the front cover 1. The second skeleton oil seal 11 is used to isolate the motor assembly 5 from the gear assembly 6, so as to prevent the grease of the gear assembly 6 from entering the motor assembly 5 and affecting the performance of the motor assembly 5.

[0050] In a specific embodiment, the motor assembly further includes a mounting base plate 7, which is connected to the barrel 2 by fasteners. The fasteners can be screws, which allows the mounting base plate 7 to be movably connected to the barrel 2. This allows for customization according to different installation occasions and size requirements, providing great flexibility.

[0051] In addition, a semi-circular mounting groove 21 is provided on the outer side of the barrel 2, through which the motor assembly wiring can be fixed.

[0052] The motor assembly provided in this embodiment has excellent heat dissipation and sealing effects, and its structure is reasonable and easy to install.

[0053] Example 2

[0054] This embodiment provides a go-kart, which includes the motor assembly described in Embodiment 1.

[0055] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should all be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A motor assembly, characterized in that, The motor assembly includes a front cover, a barrel, a rear cover, and a motor shaft. The front cover is located at one end of the barrel, and the rear cover is located at the other end of the barrel. The motor shaft passes through the barrel, with one end extending into the rear cover and the other end extending into and passing through the front cover. The surfaces of the front cover, the barrel, and the rear cover are all streamlined to achieve heat dissipation of the motor assembly.

2. The motor assembly according to claim 1, characterized in that, The motor assembly further includes a motor component disposed within the casing. The motor component includes a rotor and a stator. The rotor is located within the stator, and the magnetic poles of the rotor are distributed in a block-like pattern.

3. The motor assembly according to claim 2, characterized in that, The motor assembly also includes a gear assembly, which includes a housing cover, a transmission unit, and a sealing gasket. The housing cover engages with the front cover via the sealing gasket, and the transmission unit is located in the space formed by the housing cover, the sealing gasket, and the front cover.

4. The motor assembly according to claim 3, characterized in that, The transmission unit includes a driving wheel, a driven wheel, and an output gear shaft. The driving wheel is connected to the motor shaft, the driven wheel meshes with the driving wheel, the driven wheel is sleeved on the output gear shaft, and the output gear shaft is disposed on the front end cover.

5. The motor assembly according to claim 4, characterized in that, The grease layer applied to the driving gear and the driven gear; and / or the shaft extension of the output gear shaft having symmetrically distributed planes.

6. The motor assembly according to claim 5, characterized in that, The box cover is equipped with a first skeleton oil seal for sealing the space.

7. The motor assembly according to claim 3, characterized in that, The box cover, the sealing gasket, and the front cover are fixed by a positioning pin, which includes a hollow sleeve and a bolt, and the bolt cooperates with the sleeve.

8. The motor assembly according to claim 3, characterized in that, A second skeleton oil seal is installed on the bearing shell of the front end cover. The second skeleton oil seal is used to isolate the motor assembly from the gear assembly.

9. The motor assembly according to any one of claims 1-8, characterized in that, The motor assembly also includes a mounting base plate, which is connected to the barrel by fasteners; and / or the outer side of the barrel is provided with a semi-circular mounting groove.

10. A go-kart, characterized in that, Includes the motor assembly as described in any one of claims 1-9.

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