Drive system for high-speed vehicle
By introducing oil cooling into the hub motor, and using oil scraper ribs and oil guide channels to introduce lubricating oil to the heat-generating elements, the problem of insufficient heat dissipation in hub motors of high-speed vehicles is solved, achieving a highly efficient heat dissipation effect.
Patent Information
- Application Number
- CN202422844451.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-20
- Publication Date
- 2025-12-19
- Estimated Expiration
- 2034-11-20
AI Technical Summary
Existing hub motors have poor heat dissipation performance in high-speed vehicles. Air cooling cannot effectively cool the internal heat source, which may cause the motor components to overheat.
The oil cooling method is adopted. By setting oil scraping ribs and oil guide channels on the hub housing and motor housing, the lubricating oil forms an annular oil film and is introduced to the heat-generating element for heat dissipation. The heat dissipation path is optimized by combining the planetary carrier and gear ring structure.
It achieves reliable heat dissipation for heat-generating components, has a simple structure, is easy to process and manufacture, and does not require an additional fan, thus meeting the heat dissipation requirements of high-speed vehicles.
Smart Images
Figure CN223693770U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to high -speed traffic equipment technical field, specifically, relate to a drive system for high -speed vehicle. BACKGROUND
[0002] Most of the existing hub motors are brushless motors, and the brushless motor directly drives the vehicle to move forward, which has the advantages of simple structure and low cost; it has a large internal space and achieves a good heat dissipation effect through air cooling, so the hub motor of medium and low speed generally adopts the structure form of outer rotor and inner stator; however, when the existing hub motor is applied to high-speed vehicles, the disadvantages of air cooling heat dissipation are as follows: the heat dissipation of air cooling can only cool the shell, and the main heat source in the interior cannot be directly cooled, and high power and large torque are required for high-speed vehicles to ensure that they can run continuously, if air cooling is used, it will not meet the normal heat dissipation requirements, and the internal components of the motor may overheat and cause demagnetization and burning. SUMMARY
[0003] The main purpose of the utility model is to provide a drive system for high-speed vehicles to solve the problem of poor heat dissipation effect of the hub motor of high-speed vehicles in the prior art.
[0004] In order to achieve the above purpose, the utility model provides a drive system for high-speed vehicles, which comprises a hub shell and a motor assembly, the hub shell has a first containing cavity, the cavity wall surface of the first containing cavity is provided with a first oil scraping rib, the first oil scraping rib is used for scraping the lubricating oil in the first containing cavity and forming an annular oil film; the motor assembly is arranged in the first containing cavity, the motor assembly comprises a motor shell, the outer peripheral surface of the motor shell is provided with a second oil scraping rib and a first oil guide channel, the second oil scraping rib is used for scraping the annular oil film to the first oil guide channel; wherein the motor shell has a second containing cavity, the cavity wall surface of the second containing cavity is provided with a first oil guide hole, the first oil guide hole penetrates the outer peripheral surface of the motor shell, and the extension path of the first oil guide channel passes through the first oil guide hole, so as to guide the lubricating oil to the heat generating element in the second containing cavity for heat dissipation.
[0005] Further, the first oil scraping rib extends along the axial direction of the hub shell, and the first oil scraping rib is a plurality of first oil scraping ribs, the plurality of first oil scraping ribs are arranged at intervals around the circumference of the hub shell; and / or, the second oil scraping rib extends along the axial direction of the motor shell, and the second oil scraping rib is a plurality of second oil scraping ribs, the plurality of second oil scraping ribs are arranged at intervals around the circumference of the motor shell.
[0006] Further, the hub shell comprises a hub end cover and a hub casing, the hub end cover covers one axial end of the hub casing to form a first accommodating cavity, the hub casing has a connected stepped shaft section and a cylindrical shaft section; wherein the diameter of the cylindrical shaft section is larger than that of the stepped shaft section, the first oil scraping rib is protrudingly arranged on the cylindrical shaft section and extends along the axial direction of the cylindrical shaft section by a first preset distance L1, so that the first oil scraping rib is in a strip shape.
[0007] Further, the second oil scraping rib is in a block shape, and the second oil scraping rib is a plurality of second oil scraping ribs, the plurality of second oil scraping ribs are arranged in the axial and circumferential directions of the motor shell, and the second oil scraping rib extends in the axial direction of the motor shell by a second preset distance L2, and the first preset distance L1 and the second preset distance L2 satisfy: L1>L2.
[0008] Further, the outer circumferential surface of the motor shell is protrudingly provided with a plurality of oil blocking ribs, each of the oil blocking ribs extends in the circumferential direction of the motor shell, and the first oil guiding flow channel is formed between any two adjacent oil blocking ribs in the plurality of oil blocking ribs.
[0009] Further, the heating element comprises a coil; the motor assembly comprises a motor shaft, a rotor structure and a stator structure, wherein the rotor structure is sleeved on the outer circumferential side of the motor shaft; the stator structure is sleeved on the outer circumferential side of the rotor structure, and the axial both ends of the stator structure are provided with coils; two groups of first oil guiding holes, the two groups of first oil guiding holes are respectively located at positions opposite to the coils at the axial both ends of the second accommodating cavity, and each group of first oil guiding holes comprises a plurality of first oil guiding holes, and the plurality of first oil guiding holes are arranged in the axial and circumferential directions of the second accommodating cavity; the first oil guiding flow channel is at least two, and the at least two first oil guiding flow channels correspond to the two groups of first oil guiding holes one by one.
[0010] Further, the hub shell comprises a hub end cover and a hub casing, the hub end cover covers one axial end of the hub casing to form a first accommodating cavity, the first accommodating cavity comprises a first sub-space and a second sub-space which are connected in communication, the hub casing has a connected stepped shaft section and a cylindrical shaft section, the stepped shaft section has the first sub-space, and the cylindrical shaft section has the second sub-space; part of the motor shaft is located in the second sub-space, another part of the motor shaft extends into the first sub-space and is arranged in the first sub-space, and the outer circumferential surface of the motor shaft located in the first sub-space has a first tooth structure; the drive system further comprises a planet carrier and a gear ring structure, wherein the planet carrier is arranged in the first accommodating cavity and connected with the motor shell, the planet carrier is provided with at least one planet shaft, the outer circumferential side of the planet shaft is sleeved with a planet gear, and the outer circumferential side of the planet gear has a second tooth structure for meshing with the first tooth structure; the gear ring structure is arranged in the first sub-space, the inner circumferential surface of the gear ring structure has a third tooth structure for meshing with the second tooth structure, and the outer circumferential side of the gear ring structure is in interference fit with the stepped shaft section.
[0011] Further, a first installation space is formed between the outer circumferential surface of the planet shaft and the inner circumferential surface of the planet wheel, and the first installation space is provided with a first bearing structure.
[0012] Further, the outer circumferential surface of the planet carrier is provided with a third oil scraping rib for cooperating with the second oil scraping rib to scrape the annular oil film; the planet carrier comprises a first disc body and a column body, wherein the third oil scraping rib is protrusively arranged on the outer circumferential surface of the first disc body; the column body is arranged at an axial end surface of the first disc body, and the column body has a second installation space in which the planet shaft sleeved with the planet wheel is arranged; wherein the outer circumferential side of the column body is provided with a plurality of support blocks, the plurality of support blocks extend radially around the column body, at least one support block of the plurality of support blocks is provided with a plurality of second oil guide holes, and the plurality of second oil guide holes are in communication with the second installation space, so as to guide the lubricating oil into the second installation space and lubricate and cool the planet wheel; a second oil guide flow channel is formed between two adjacent support blocks of the plurality of support blocks, and the extension path of the second oil guide flow channel passes through the second oil guide hole; the outer circumferential surface of the motor shell further has a third oil guide flow channel, and the third oil guide flow channel is in communication with the second oil guide flow channel, so as to guide the lubricating oil to the second oil guide flow channel.
[0013] Further, the planet carrier further comprises a second disc body arranged at an axial end away from the first disc body of the column body, and the diameter of the second disc body is smaller than that of the first disc body; a support hole structure is arranged on the end surface of the side of the second disc body away from the column body, the support hole structure is used for supporting the planet shaft, and an oil guide gap is arranged on the hole wall surface of the support hole structure; the side of the second disc body away from the column body further has a fourth oil guide flow channel and a third oil guide hole on the end surface, and the extension path of the fourth oil guide flow channel passes through the third oil guide hole and the oil guide gap, so as to guide the lubricating oil to the first installation space and lubricate and cool the first bearing structure.
[0014] Further, the hub end cover is provided with a first avoiding through hole, and the hub shell is provided with a second avoiding through hole, both of which extend along the axial direction of the hub shell; the driving system further comprises a first support shaft and a second support shaft, wherein the first end of the first support shaft is used for connecting with the frame, the second end of the first support shaft passes through the first avoiding through hole and extends into the second sub-space to connect with the motor shell; the first end of the second support shaft is used for connecting with the frame, and the second end of the second support shaft passes through the second avoiding through hole and extends into the first sub-space to connect with the planet carrier; wherein the outer circumferential side of the first support shaft and the inner circumferential surface of the hub end cover form a third installation space, and the third installation space is provided with a second bearing structure; the outer circumferential side of the second support shaft and the inner circumferential surface of the stepped shaft segment form a third installation space fourth installation space, and the third installation space fourth installation space is provided with a third bearing structure.
[0015] Further, the first avoiding through hole and the second avoiding through hole are concentrically arranged.
[0016] Further, the first support shaft is a hollow shaft; the driving system further comprises a gas-permeable structure, which is arranged at a hollow position of the first support shaft and is used to communicate the second containing cavity and the outside through the gas-permeable pipe to balance the air pressure of the second containing cavity.
[0017] The technical scheme of the utility model provides a driving system for high-speed vehicle, including wheel hub shell and motor assembly, wherein, the wheel hub shell has first containing cavity, the cavity wall surface of first containing cavity is provided with first oil scraping rib, first oil scraping rib is used for scraping lubricating oil in first containing cavity and makes it form annular oil film, motor assembly is arranged in first containing cavity, motor assembly includes motor shell, the outer circumferential surface of motor shell is provided with second oil scraping rib and first oil guide channel, second oil scraping rib is used for scraping annular oil film to first oil guide channel, motor shell has second containing cavity, the cavity wall surface of second containing cavity is provided with first oil guide hole, first oil guide hole penetrates the outer circumferential surface of motor shell, and the extension path of first oil guide channel passes through first oil guide hole to introduce lubricating oil into the heat generating element in second containing cavity and radiate heat. In this way, the heat dissipation reliability of the heat generating element is ensured, compared with the existing air cooling heat dissipation, the oil cooling mode in the application is more simple in structure and easy to process and manufacture, and in the case that no additional fan is needed, the lubricating oil in the first containing cavity is fully utilized to achieve the purpose of heat dissipation of the heat generating element. BRIEF DESCRIPTION OF DRAWINGS
[0018] The drawings accompanying the specification of this application form a part thereof, serve to provide further understanding of the present application, and together with the description of the exemplary embodiments of the present application, serve to explain the present application, and do not constitute improper limitations on the present application. In the drawings:
[0019] Figure 1 A cross-sectional structure schematic diagram of a driving system according to an optional embodiment of the utility model is shown;
[0020] Figure 2 A structure schematic diagram of a wheel hub shell of a wheel hub shell of a driving system according to an optional embodiment of the utility model is shown;
[0021] Figure 3 A structure schematic diagram of a motor shell of a motor assembly of a driving system according to an optional embodiment of the utility model is shown;
[0022] Figure 4 A structure schematic diagram of a planet carrier of a driving system according to an optional embodiment of the utility model is shown;
[0023] Figure 5 A structure schematic diagram of a planet carrier in Figure 4 is shown.
[0024] Wherein, the above-mentioned drawings include the following reference signs:
[0025] 10, hub shell; 11, first accommodating cavity; 12, first oil scraping rib; 13, hub end cover; 14, hub casing; 141, stepped shaft section; 142, cylindrical shaft section;
[0026] 20, motor assembly; 21, motor shell; 211, second oil scraping rib; 212, first oil guiding channel; 213, second accommodating cavity; 214, first oil guiding hole; 215, oil blocking rib; 22, motor shaft; 23, rotor structure; 24, stator structure;
[0027] 30, planet carrier; 31, planet shaft; 32, planet gear; 33, support block; 331, second oil guiding hole; 34, first bearing structure; 35, third oil scraping rib; 36, first disc body; 37, second mounting space; 38, second oil guiding channel; 39, second disc body; 391, support hole structure; 392, oil guiding gap; 393, fourth oil guiding channel; 394, third oil guiding hole;
[0028] 40, ring gear structure; 50, first support shaft; 60, second support shaft; 70, second bearing structure; 80, third bearing structure;
[0029] 90, air permeable structure; 91, air permeable pipe. DETAILED DESCRIPTION
[0030] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. The description of the at least one exemplary embodiment is actually only illustrative, but not as any limitation on the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.
[0031] In order to solve the problem of poor heat dissipation effect of the hub motor of the high-speed vehicle in the prior art, the present application provides a driving system for a high-speed vehicle.
[0032] As Figures 1 to 5As shown, the drive system for high-speed vehicles comprises a hub shell 10 and a motor assembly 20, wherein the hub shell 10 has a first accommodating cavity 11, the cavity wall surface of the first accommodating cavity 11 is provided with a first oil scraping rib 12, the first oil scraping rib 12 is used for scraping the lubricating oil in the first accommodating cavity 11 and forming an annular oil film; the motor assembly 20 is arranged in the first accommodating cavity 11, the motor assembly 20 comprises a motor shell 21, the outer peripheral surface of the motor shell 21 is provided with a second oil scraping rib 211 and a first oil guiding channel 212, the second oil scraping rib 211 is used for scraping the annular oil film to the first oil guiding channel 212; wherein the motor shell 21 has a second accommodating cavity 213, the cavity wall surface of the second accommodating cavity 213 is provided with a first oil guiding hole 214, the first oil guiding hole 214 penetrates through the outer peripheral surface of the motor shell 21, and the extension path of the first oil guiding channel 212 passes through the first oil guiding hole 214, so as to guide the lubricating oil to the heat generating element in the second accommodating cavity 213 for heat dissipation.
[0033] The technical scheme of the utility model provides a drive system for high-speed vehicles, comprising a hub shell 10 and a motor assembly 20, wherein the hub shell 10 has a first accommodating cavity 11, the cavity wall surface of the first accommodating cavity 11 is provided with a first oil scraping rib 12, the first oil scraping rib 12 is used for scraping the lubricating oil in the first accommodating cavity 11 and forming an annular oil film; the motor assembly 20 is arranged in the first accommodating cavity 11, the motor assembly 20 comprises a motor shell 21, the outer peripheral surface of the motor shell 21 is provided with a second oil scraping rib 211 and a first oil guiding channel 212, the second oil scraping rib 211 is used for scraping the annular oil film to the first oil guiding channel 212; the motor shell 21 has a second accommodating cavity 213, the cavity wall surface of the second accommodating cavity 213 is provided with a first oil guiding hole 214, the first oil guiding hole 214 penetrates through the outer peripheral surface of the motor shell 21, and the extension path of the first oil guiding channel 212 passes through the first oil guiding hole 214, so as to guide the lubricating oil to the heat generating element in the second accommodating cavity 213 for heat dissipation. In this way, the heat dissipation reliability of the heat generating element is ensured, compared with the existing air cooling heat dissipation, the oil cooling mode in the application is more simple in structure and easy to process and manufacture, and the lubricating oil in the first accommodating cavity 11 is fully utilized to achieve the purpose of heat dissipation of the heat generating element without additional fan.
[0034] It should be noted that in the present application, the high-speed vehicle can be an electric motorcycle, and can also be other vehicles that require high power and high torque.
[0035] It should be noted that in the present application, the first oil scraping rib 12 extends along the axial direction of the hub shell 10, and the first oil scraping rib 12 is a plurality of first oil scraping ribs 12 which are arranged at intervals around the circumference of the hub shell 10; and / or, the second oil scraping rib 211 extends along the axial direction of the motor shell 21, and the second oil scraping rib 211 is a plurality of second oil scraping ribs 211 which are arranged at intervals around the circumference of the motor shell 21. In this way, the arrangement of the plurality of first oil scraping ribs 12 ensures the reliability of forming an oil film of lubricating oil, and in addition, the arrangement of the plurality of second oil scraping ribs 211 ensures that the lubricating oil can be effectively scraped onto the motor shell 21 and introduced into the heat generating elements in the second accommodating cavity 213 of the motor shell 21 for heat dissipation.
[0036] As shown in Figure 1 and Figure 2 , the hub shell 10 comprises a hub end cover 13 and a hub shell 14, the hub end cover 13 covers one end of the hub shell 14 in the axial direction to form the first accommodating cavity 11, and the hub shell 14 has a connected stepped shaft section 141 and a cylindrical shaft section 142; wherein the diameter of the cylindrical shaft section 142 is greater than the diameter of the stepped shaft section 141, and the first oil scraping rib 12 is protrudingly arranged on the cylindrical shaft section 142 and extends along the axial direction of the cylindrical shaft section 142 by a first predetermined distance L1, so that the first oil scraping rib 12 is in a strip shape. In this way, it is ensured that the first oil scraping rib 12 in a strip shape can scrape the lubricating oil into an oil film state.
[0037] As shown in Figure 2 and Figure 3 , the second oil scraping rib 211 is in a block shape, and the second oil scraping rib 211 is a plurality of second oil scraping ribs 211 which are arranged at intervals along the axial and circumferential directions of the motor shell 21, and the second oil scraping rib 211 extends along the axial direction of the motor shell 21 by a second predetermined distance L2, and the first predetermined distance L1 and the second predetermined distance L2 satisfy: L1>L2. In this way, it is ensured that the second oil scraping rib 211 in a block shape can effectively scrape the lubricating oil in an oil film state onto the motor shell 21 and introduce it into the heat generating elements in the second accommodating cavity 213 of the motor shell 21 for heat dissipation.
[0038] As shown in Figure 3 , the outer circumferential surface of the motor shell 21 protrudingly has a plurality of oil blocking ribs 215, each of the oil blocking ribs 215 extends along the circumferential direction of the motor shell 21, and between any two adjacent oil blocking ribs 215 in the plurality of oil blocking ribs 215, a first oil guiding channel 212 is formed. In this way, it is ensured that the lubricating oil can be smoothly introduced into the heat generating elements in the second accommodating cavity 213 along the first oil guiding channel 212 under the blocking and guiding action of the oil blocking ribs 215, ensuring the timeliness and efficiency of the introduction of the lubricating oil, and ensuring that the lubricating oil can flow along the shortest possible path.
[0039] As shown in Figure 3As shown, the heating element includes a coil; the motor assembly 20 includes a motor shaft 22, a rotor structure 23 and a stator structure 24, wherein the rotor structure 23 is sleeved on the outer peripheral side of the motor shaft 22; the stator structure 24 is sleeved on the outer peripheral side of the rotor structure 23, and the stator structure 24 has coils at both axial ends thereof; two groups of first oil guide holes are respectively located at positions opposite to the coils at both axial ends of the second accommodating cavity 213, and a group of the first oil guide holes includes a plurality of first oil guide holes 214, which are arranged at intervals in the axial and circumferential directions of the second accommodating cavity 213; the first oil flow channel 212 is at least two, and the at least two first oil flow channels 212 correspond to the two groups of first oil guide holes one by one. In this way, the reliability and effectiveness of heat dissipation of the lubricating oil introduced into the second accommodating cavity 213 at the coil are ensured.
[0040] As shown in Figure 1 , the hub shell 10 includes a hub end cover 13 and a hub casing 14, the hub end cover 13 covers one axial end of the hub casing 14 to enclose a first accommodating cavity 11, the first accommodating cavity 11 includes a first sub-space and a second sub-space connected in communication, the hub casing 14 has a stepped shaft section 141 and a cylindrical shaft section 142 connected, the stepped shaft section 141 has the first sub-space, and the cylindrical shaft section 142 has the second sub-space; a part of the motor shaft 22 is located in the second sub-space, another part of the motor shaft 22 extends into the first sub-space and is arranged in the first sub-space, and the outer peripheral surface of the motor shaft 22 located in the first sub-space has a first tooth structure; the drive system further includes a planet carrier 30 and a ring gear structure 40, wherein the planet carrier 30 is arranged in the first accommodating cavity 11 and connected with the motor shell 21, the planet carrier 30 is provided with at least one planet shaft 31, the planet shaft 31 is sleeved with a planet gear 32 on the outer peripheral side thereof, and the planet gear 32 has a second tooth structure on the outer peripheral side thereof for meshing with the first tooth structure; the ring gear structure 40 is arranged in the first sub-space, the inner peripheral surface of the ring gear structure 40 has a third tooth structure for meshing with the second tooth structure, and the outer peripheral side of the ring gear structure 40 is in interference fit with the stepped shaft section 141. In this way, the high internal meshing load carrying capacity and the space volume of the ring gear structure 40 are fully utilized, thereby reducing the radial and axial dimensions of the drive system, making the structure of the drive system more compact and having sufficient load carrying capacity, and improving the working efficiency of the drive system, so that the drive system can meet the working conditions of high speed and high torque.
[0041] As shown in Figure 1 , a first installation space is formed between the outer peripheral surface of the planet shaft 31 and the inner peripheral surface of the planet gear 32, and the first installation space is provided with a first bearing structure 34. In this way, the arrangement of the first bearing structure 34 ensures the rotation reliability and stability of the planet gear 32.
[0042] As shown in Figure 1 , Figure 4 andFigure 5 As shown, the outer circumferential surface of the planet carrier 30 is provided with a third oil scraping rib 35 for cooperating with the second oil scraping rib 211 to scrape the annular oil film; the planet carrier 30 comprises a first disc body 36 and a column, wherein the third oil scraping rib 35 is protrusively arranged on the outer circumferential surface of the first disc body 36; the column is arranged at the axial one end surface of the first disc body 36, and the column has a second mounting space 37 in which the planetary shaft 31 sleeved with the planetary gear 32 is arranged; wherein the outer circumferential side of the column is provided with a plurality of support blocks 33, the plurality of support blocks 33 extend radially around the column, at least one support block 33 of the plurality of support blocks 33 is provided with a plurality of second oil guiding holes 331, and the plurality of second oil guiding holes 331 are in communication with the second mounting space 37, so as to guide the lubricating oil into the second mounting space 37 and lubricate and cool the planetary gear 32; a second oil guiding flow channel 38 is formed between two adjacent support blocks 33 of the plurality of support blocks 33, and the extension path of the second oil guiding flow channel 38 passes through the second oil guiding hole 331; the outer circumferential surface of the motor housing 21 further has a third oil guiding flow channel in communication with the second oil guiding flow channel 38, so as to guide the lubricating oil to the second oil guiding flow channel 38. In this way, the lubricating oil enters the second oil guiding flow channel 38 through the third oil guiding flow channel of the motor housing 21, and is introduced into the second mounting space 37 through the plurality of second oil guiding holes 331, so as to achieve the purpose of lubricating and cooling the planetary gear 32, and also can play the role of lubricating and cooling the first tooth structure meshing with the second tooth structure of the planetary gear 32, and the third tooth structure of the gear ring structure 40 meshing with the second tooth structure of the planetary gear 32.
[0043] Optionally, the third oil guiding flow channel is formed after the first oil guiding flow channel 212 is provided with a relief gap, and of course can also be separately provided, which is not limited in this regard.
[0044] As shown in Figure 1 , Figure 4 and Figure 5 , the planet carrier 30 further comprises a second disc body 39, the second disc body 39 is arranged at the axial one end away from the first disc body 36 of the column, and the diameter of the second disc body 39 is smaller than that of the first disc body 36; the end surface of the side away from the column of the second disc body 39 is provided with a support hole structure 391 for supporting the planetary shaft 31, and the hole wall surface of the support hole structure 391 is provided with an oil guiding gap 392; the end surface of the side away from the column of the second disc body 39 further has a fourth oil guiding flow channel 393 and a third oil guiding hole 394, the extension path of the fourth oil guiding flow channel 393 passes through the third oil guiding hole 394 and the oil guiding gap 392, so as to guide the lubricating oil to the first mounting space and lubricate and cool the first bearing structure 34. In this way, the first bearing structure 34 in the first mounting space is lubricated and cooled.
[0045] It should be noted that in the present application, Figure 1 The driving system shown in the middle is normally installed in a horizontal state, i.e. the motor shaft 22 is in a horizontal state, and Figure 1 The first support shaft 50 in the middle is located on the left side of the horizontal, Figure 1 The second support shaft 60 in the middle is located on the right side of the horizontal.
[0046] As Figure 1 shown, the wheel hub end cover 13 is provided with a first avoiding through hole, and the wheel hub shell 14 is provided with a second avoiding through hole, both of which extend along the axial direction of the wheel hub shell 10; the driving system further comprises a first support shaft 50 and a second support shaft 60, wherein the first end of the first support shaft 50 is used to connect with the frame, the second end of the first support shaft 50 passes through the first avoiding through hole and extends into the second sub-space to connect with the motor shell 21; the first end of the second support shaft 60 is used to connect with the frame, and the second end of the second support shaft 60 passes through the second avoiding through hole and extends into the first sub-space to connect with the planet carrier 30; wherein the outer circumferential side of the first support shaft 50 and the inner circumferential surface of the wheel hub end cover 13 form a third mounting space, and the third mounting space is provided with a second bearing structure 70; the outer circumferential side of the second support shaft 60 and the inner circumferential surface of the stepped shaft section 141 form a third mounting space fourth mounting space, and the third mounting space fourth mounting space is provided with a third bearing structure 80. In this way, the driving system can be stably installed on the frame through the first support shaft 50 and the second support shaft 60, ensuring the installation stability of the driving system.
[0047] It should be noted that in the present application, the first avoiding through hole and the second avoiding through hole are concentrically arranged.
[0048] As Figure 4 shown, the planet carrier 30 has a plurality of support blocks 33, each of which is provided with a second oil guide hole 331, and the planet carrier 30 further has a second oil guide flow channel 38, the extension path of which passes through the second oil guide hole 331, and the second oil guide hole 331 communicates with the third mounting space fourth mounting space to introduce lubricating oil into the third mounting space fourth mounting space and lubricate and cool the third bearing structure 80. In this way, the lubricating oil ensures the lubrication and cooling reliability of the third bearing structure 80.
[0049] As Figure 1As shown, the first support shaft 50 is a hollow shaft; the driving system further comprises a gas-permeable structure 90, which is arranged at the hollow position of the first support shaft 50, and is used to communicate the second containing cavity 213 with the outside through a gas-permeable tube 91, so as to balance the air pressure of the second containing cavity 213. In this way, the arrangement of the gas-permeable structure 90 enables the second containing cavity 213 to be in communication with the outside, which is conducive to balancing the air pressure of the second containing cavity 213, preventing external impurities from entering the inside to corrode the driving system, preventing water vapor from being generated inside the driving system, discharging high-temperature gas inside, increasing the cooling effect, and the like.
[0050] The application provides a driving system for a high-speed vehicle, comprising a hub shell 10 and a motor assembly 20, wherein the hub shell 10 has a first containing cavity 11, the cavity wall surface of the first containing cavity 11 is provided with a first oil scraping rib 12, the first oil scraping rib 12 is used for scraping the lubricating oil in the first containing cavity 11 and forming an annular oil film; the motor assembly 20 is arranged in the first containing cavity 11, the motor assembly 20 comprises a motor shell 21, the outer peripheral surface of the motor shell 21 is provided with a second oil scraping rib 211 and a first oil guiding channel 212, the second oil scraping rib 211 is used for scraping the annular oil film to the first oil guiding channel 212; the motor shell 21 has a second containing cavity 213, the cavity wall surface of the second containing cavity 213 is provided with a first oil guiding hole 214, the first oil guiding hole 214 penetrates through the outer peripheral surface of the motor shell 21, and the extension path of the first oil guiding channel 212 passes through the first oil guiding hole 214, so as to guide the lubricating oil to the heat generating element in the second containing cavity 213 for heat dissipation. In this way, the heat dissipation reliability of the heat generating element is ensured, compared with the existing air cooling heat dissipation, the oil cooling mode in the application is more simple in structure and easy to process and manufacture, and in the case that no additional fan is needed, the lubricating oil in the first containing cavity 11 is fully utilized to achieve the purpose of heat dissipation of the heat generating element.
[0051] It is to be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the application. As used herein, the singular form is intended to include the plural form, unless the context clearly indicates otherwise, and it should also be understood that, when the terms "comprise" and / or "include" are used in the specification, there is a presence of the features, steps, operations, devices, components and / or combinations thereof.
[0052] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.
[0053] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.
[0054] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.
[0055] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.
[0056] The above merely describes preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims
1. A drive system for a high speed vehicle, characterized by, The application relates to a driving system, comprising: a hub shell (10) having a first accommodating cavity (11), a cavity wall surface of the first accommodating cavity (11) is provided with a first oil scraping rib (12) for scraping lubricating oil in the first accommodating cavity (11) and forming an annular oil film; a motor assembly (20) arranged in the first accommodating cavity (11), the motor assembly (20) comprises a motor shell (21), an outer peripheral surface of the motor shell (21) is provided with a second oil scraping rib (211) and a first oil guiding channel (212), the second oil scraping rib (211) is used for scraping the annular oil film to the first oil guiding channel (212); wherein the motor shell (21) has a second accommodating cavity (213), a cavity wall surface of the second accommodating cavity (213) is provided with a first oil guiding hole (214), the first oil guiding hole (214) penetrates through the outer peripheral surface of the motor shell (21), and an extension path of the first oil guiding channel (212) passes through the first oil guiding hole (214) to guide the lubricating oil to a heat generating element in the second accommodating cavity (213) for heat dissipation.
2. The driving system according to claim 1, wherein the first oil scraping rib (12) extends along an axial direction of the hub shell (10), and the first oil scraping rib (12) is a plurality of first oil scraping ribs (12) which are arranged at intervals in a circumferential direction of the hub shell (10); and / or the second oil scraping rib (211) extends along an axial direction of the motor shell (21), and the second oil scraping rib (211) is a plurality of second oil scraping ribs (211) which are arranged at intervals in a circumferential direction of the motor shell (21).
3. The drive system of claim 1, wherein, The hub shell (10) comprises: a hub end cover (13) and a hub shell (14), the hub end cover (13) covers an axial end of the hub shell (14) to form the first accommodating cavity (11), and the hub shell (14) has a stepped shaft section (141) and a cylindrical shaft section (142) connected to each other; wherein the diameter of the cylindrical shaft section (142) is greater than the diameter of the stepped shaft section (141), the first oil scraping rib (12) is protrudingly arranged on the cylindrical shaft section (142) and extends along an axial direction of the cylindrical shaft section (142) by a first preset distance L1, so that the first oil scraping rib (12) is in a strip shape.
4. The driving system according to claim 3, wherein the second oil scraping rib (211) is in a block shape, and the second oil scraping rib (211) is a plurality of second oil scraping ribs (211) which are arranged at intervals in an axial direction and a circumferential direction of the motor shell (21), and the second oil scraping rib (211) extends along the axial direction of the motor shell (21) by a second preset distance L2, and the first preset distance L1 and the second preset distance L2 satisfy L1>L2.
5. The drive system of claim 1, wherein, The outer circumferential surface of the motor housing (21) is provided with a plurality of oil retaining ribs (215), each of which extends along the circumference of the motor housing (21), and the first oil guiding flow channel (212) is formed between any two adjacent oil retaining ribs (215) among the plurality of oil retaining ribs (215).
6. The drive system of claim 1, wherein, the heating element comprises a coil; the motor assembly (20) comprises: a motor shaft (22); a rotor structure (23) sleeved on the outer circumferential side of the motor shaft (22); a stator structure (24) sleeved on the outer circumferential side of the rotor structure (23), the stator structure (24) having the coil at both axial ends thereof; two groups of first oil guiding holes, each of the two groups of first oil guiding holes being located at a position opposite to the coil at an axial end of the second accommodating cavity (213), and each group of the first oil guiding holes comprising a plurality of first oil guiding holes (214) arranged at intervals along the axial direction and the circumferential direction of the second accommodating cavity (213); the first oil guiding flow channel (212) is at least two, and at least two first oil guiding flow channels (212) correspond to the two groups of first oil guiding holes one by one.
7. The drive system of claim 6, wherein, the hub housing (10) comprises: a hub end cover (13) and a hub casing (14), the hub end cover (13) covering an axial end of the hub casing (14) to form the first accommodating cavity (11), the first accommodating cavity (11) comprising a first sub-space and a second sub-space connected in communication, the hub casing (14) having a stepped shaft section (141) and a cylindrical shaft section (142) connected in series, the stepped shaft section (141) having the first sub-space, and the cylindrical shaft section (142) having the second sub-space; a portion of the motor shaft (22) is located in the second sub-space, another portion of the motor shaft (22) extends into the first sub-space, and the outer circumferential surface of the motor shaft (22) located in the first sub-space has a first tooth structure; the drive system further comprises: a planet carrier (30) arranged in the first accommodating cavity (11) and connected with the motor housing (21), the planet carrier (30) being provided with at least one planet shaft (31), the outer circumferential side of the planet shaft (31) being sleeved with a planet wheel (32), the outer circumferential side of the planet wheel (32) having a second tooth structure for meshing with the first tooth structure; a ring gear structure (40) arranged in the first sub-space, the inner circumferential surface of the ring gear structure (40) having a third tooth structure for meshing with the second tooth structure, and the outer circumferential side of the ring gear structure (40) being in interference fit with the stepped shaft section (141).
8. The drive system of claim 7, wherein, A first mounting space is formed between the outer circumferential surface of the planetary shaft (31) and the inner circumferential surface of the planetary gear (32), and the first mounting space is provided with a first bearing structure (34).
9. The drive system according to claim 8, wherein The outer circumferential surface of the planetary carrier (30) is provided with a third oil scraping rib (35) for scraping the annular oil film in cooperation with the second oil scraping rib (211); The planetary carrier (30) comprises: A first disc body (36) is provided on the outer circumferential surface of the first disc body (36), and the third oil scraping rib (35) is protruded on the outer circumferential surface of the first disc body (36); A column is provided at an axial one end surface of the first disc body (36), and the column has a second mounting space (37) in which the planetary shaft (31) sleeved with the planetary gear (32) is contained; The outer circumferential side of the column is provided with a plurality of support blocks (33) which extend radially around the column, and a plurality of second oil guide holes (331) are formed in at least one of the support blocks (33), and the second oil guide holes (331) and the second mounting space (37) are in communication, so as to introduce lubricating oil into the second mounting space (37) and lubricate and cool the planetary gear (32); A second oil guide flow channel (38) is formed between two adjacent support blocks (33) among the plurality of support blocks (33), and the extension path of the second oil guide flow channel (38) passes through the second oil guide hole (331); The outer circumferential surface of the motor housing (21) further has a third oil guide flow channel which is in communication with the second oil guide flow channel (38) for introducing lubricating oil into the second oil guide flow channel (38).
10. The drive system according to claim 9, wherein The planetary carrier (30) further comprises: A second disc body (39) is provided at an axial one end of the column away from the first disc body (36), and the diameter of the second disc body (39) is smaller than that of the first disc body (36); A support hole structure (391) is provided on the end surface of the side of the second disc body (39) away from the column, and the support hole structure (391) is used for supporting the planetary shaft (31), and an oil guide gap (392) is formed in the hole wall surface of the support hole structure (391); The end surface of the side of the second disc body (39) away from the column further has a fourth oil guide flow channel (393) and a third oil guide hole (394), and the extension path of the fourth oil guide flow channel (393) passes through the third oil guide hole (394) and the oil guide gap (392), so as to introduce lubricating oil into the first mounting space and lubricate and cool the first bearing structure (34).
11. The drive system according to claim 7, wherein The hub end cover (13) is provided with a first avoiding through hole, and the hub shell (14) is provided with a second avoiding through hole, both the first avoiding through hole and the second avoiding through hole extending along the axial direction of the hub shell (10); The driving system further comprises: A first support shaft (50), a first end of the first support shaft (50) is used for connecting with the frame, and a second end of the first support shaft (50) passes through the first avoiding through hole and extends into the second subspace to connect with the motor shell (21); A second support shaft (60), a first end of the second support shaft (60) is used for connecting with the frame, and a second end of the second support shaft (60) passes through the second avoiding through hole and extends into the first subspace to connect with the planetary carrier (30); Wherein, the outer periphery of the first support shaft (50) and the inner periphery of the hub end cover (13) form a third mounting space, and the third mounting space is provided with a second bearing structure (70); The outer periphery of the second support shaft (60) and the inner periphery of the stepped shaft section (141) form a third mounting space fourth mounting space, and the third mounting space fourth mounting space is provided with a third bearing structure (80).
12. The drive system of claim 11, wherein, The first avoiding through hole and the second avoiding through hole are concentrically arranged.
13. The driving system according to claim 11, wherein, The first support shaft (50) is a hollow shaft; The driving system further comprises: A gas permeable structure (90) is arranged at the hollow position of the first support shaft (50), and the gas permeable structure (90) is used for communicating the second containing cavity (213) and the outside through a gas permeable pipe (91) to balance the air pressure of the second containing cavity (213).