An electrically driven wheel and an electrically driven off-road vehicle

Abstract

The application discloses an electric driving wheel, relates to the technical field of high-power electric driving off-road vehicle chassis, and comprises a wheel hub, a motor assembly, a planetary reducer, a service brake, a heat dissipation assembly and a steering knuckle assembly. The motor assembly comprises a motor body, a first end cover and a second end cover. The first end cover is arranged at one end of the motor body close to the wheel hub. The second end cover is arranged at one end of the motor body away from the wheel hub. The motor body power output end is connected with the wheel hub through the planetary reducer. The service brake is sleeved at one end of the wheel hub close to the first end cover. The heat dissipation assembly is arranged on the service brake and the wheel hub. The parking brake is installed on the second end cover. The steering knuckle assembly is detachably connected with the second end cover. The overall integrated arrangement problem of the high-power electric driving wheel is effectively solved. The overall structure arrangement is compact, the interference problem between the motor assembly and the surrounding system in the steering process is avoided, the heat dissipation assembly is arranged, and heat dissipation and air exhaust are realized.

Description

Technical Field

[0001] This application relates to the field of high-power electric drive off-road vehicle chassis technology, and in particular to an electric drive wheel and an electric drive off-road vehicle. Background Technology

[0002] With the development of new energy vehicles, more and more people are choosing electric vehicles for travel. At present, the research on electric wheels for electric vehicles is mainly focused on the field of civilian passenger cars, with relatively low power, which is suitable for family use. However, when military off-road vehicles and giant mining trucks adopt electric drive, they need to use high-power electric wheels. Currently, there is no published literature that can solve the problem of spatial arrangement and functional coordination between the drive motor, reducer and brake of high-power electric wheels. Summary of the Invention

[0003] The purpose of this application is to provide an electric drive wheel and an electric drive off-road vehicle, so as to solve, to a certain extent, the technical problem of spatial arrangement and functional coordination among the various core components of a high-power electric vehicle wheel.

[0004] To solve the above-mentioned technical problems, this application adopts the following technical solution:

[0005] The first aspect of this application provides an electric drive wheel suitable for a high-power electric drive off-road vehicle, comprising: a wheel hub; a motor assembly including a motor body, a first end cover, and a second end cover, wherein the first end cover is disposed at the end of the motor body near the wheel hub, and the second end cover is disposed at the end of the motor body away from the wheel hub; a planetary reducer, wherein the power output end of the motor body is connected to the wheel hub through the planetary reducer; a service brake, wherein the service brake is sleeved on the end of the wheel hub near the first end cover; a heat dissipation assembly disposed on the service brake and the wheel hub; a parking brake mounted on the second end cover; and a steering knuckle assembly detachably connected to the second end cover.

[0006] In some embodiments, the service brake includes: a third end cover fixedly connected to the first end cover; and a brake disc disposed between the third end cover and the wheel hub.

[0007] In some embodiments, the heat dissipation assembly includes: an air inlet disposed on the outer circumferential end face of the brake disc; an air outlet disposed on the lateral end face of the brake disc; an air guide groove disposed on the circumferential side of the hub corresponding to the air inlet; and a spiral ridge disposed on the inner surface of the third end cover.

[0008] In some embodiments, the service brake further includes two brake calipers, which are respectively radially disposed within the upper and lower parts of the third end cover by mounting bolts.

[0009] In some embodiments, the second end cap is provided with an oil inlet hole, the first end cap is provided with two oil outlet pipes, the motor body is provided with a control oil passage, the oil inlet hole is connected to one end of the two oil outlet pipes through the control oil passage, and the other end of the two oil outlet pipes is respectively connected to the two brake calipers.

[0010] In some embodiments, the steering knuckle assembly includes: a steering knuckle body detachably connected to a mounting interface on the second end cap; a bracket mounted on the end of the steering knuckle body away from the motor assembly; and a steering arm connected to the steering knuckle body, the steering knuckle body being connected to a steering tie rod on the vehicle via the steering arm.

[0011] In some embodiments, the steering knuckle body is provided with a limiting block, and the bracket is provided with an adjusting bolt. The steering angle of the wheel is adjusted according to the tightening length of the adjusting bolt. When the adjusting bolt contacts the limiting block, the steering angle of the wheel reaches its limit.

[0012] In some embodiments, the bracket is provided with an oblique hole and a pin hole, the oblique hole intersects with the pin hole, a wedge bolt is installed in the oblique hole, the wedge bolt is provided with a stop surface, the stop surface contacts the pin in the pin hole to prevent the pin from rotating.

[0013] In some embodiments, the second end cap is provided with a high-voltage cable interface, an ABS sensor interface, and a cooling water interface.

[0014] A second aspect of this application provides an electric-driven off-road vehicle equipped with the aforementioned electric-driven wheels.

[0015] As can be seen from the above technical solution, this application has at least the following advantages and positive effects:

[0016] An electric drive wheel disclosed in this application effectively integrates a steering knuckle assembly, a motor assembly, a planetary reducer, a service brake, and a parking brake, solving the overall integration and layout problem of high-power electric drive wheels. The overall structure is compact, and the motor assembly can be completely arranged inside the wheel rim, avoiding interference between the motor and the surrounding system during steering. At the same time, a heat dissipation assembly is provided to achieve heat dissipation and ventilation.

[0017] This application discloses an electric drive off-road vehicle that effectively integrates a steering knuckle assembly, a motor assembly, a planetary reducer, a service brake, and a parking brake by using electric drive wheels. This solves the overall integration and layout problem of high-power electric drive wheels, resulting in a compact overall structure. The motor assembly can be completely housed within the wheel rim, avoiding interference between the motor and surrounding systems during steering. Additionally, a heat dissipation assembly is provided to achieve heat dissipation and ventilation. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 A left view of an electrically driven wheel according to an embodiment;

[0020] Figure 2 A right view of an electrically driven wheel according to an embodiment;

[0021] Figure 3 This is a schematic diagram of the structure of a parking brake for an electrically driven wheel according to an embodiment;

[0022] Figure 4 This is a schematic diagram of the structure of a brake disc for an electrically driven wheel according to an embodiment;

[0023] Figure 5 This is a schematic diagram of the interior of the third end cover of an electric drive wheel according to an embodiment;

[0024] Figure 6 This is a schematic diagram of the structure of a steering knuckle assembly for an electrically driven wheel according to an embodiment;

[0025] Figure 7 This is a schematic diagram of the structure of a wedge bolt for an electric drive wheel according to an embodiment.

[0026] The reference numerals in the attached drawings are explained as follows: 100, planetary reducer; 200, service brake; 210, brake disc; 211, air inlet; 212, main air outlet; 213, auxiliary air outlet; 220, third end cover; 221, spiral ridge; 230, mounting bolt; 300, motor assembly; 310, first end cover; 311, oil outlet pipe; 320, second end cover; 321, oil inlet; 322, high-voltage cable interface; 323, ABS sensor interface; 324, coolant interface; 400, parking brake; 500, steering knuckle assembly; 510, steering knuckle body; 511, limit block; 520, bracket; 521, adjusting bolt; 522, pin hole; 523, wedge bolt; 530, steering arm; 531, fixing bolt; 532, locating pin; 600, wheel hub. Detailed Implementation

[0027] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0028] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0029] The terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first," "second," or "third" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0030] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "connection," "installation," "connection," and "linkage" 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0031] Please see Figure 1 and Figure 2 .

[0032] Figure 1These are left and right views of an electric drive wheel according to an embodiment of this application. The wheel is suitable for high-power electric drive off-road vehicles. As shown in the figure, the wheel includes: a wheel hub 600; a motor assembly 300, including a motor body, a first end cover 310 and a second end cover 320, the first end cover 310 being disposed at the end of the motor body near the wheel hub 600, and the second end cover 320 being disposed at the end of the motor body away from the wheel hub 600; a planetary reducer 100, the power output end of the motor body being connected to the wheel hub 600 through the planetary reducer 100; a service brake 200, the service brake 200 being sleeved on the end of the wheel hub 600 near the first end cover 310; a heat dissipation assembly, disposed on the service brake 200 and the wheel hub 600; a parking brake 400, mounted on the second end cover 320; and a steering knuckle assembly 500, detachably connected to the second end cover 320. It effectively integrates the steering knuckle assembly 500, motor assembly 300, planetary reducer 100, service brake 200 and parking brake 400, solving the overall integration and layout problem of high-power electric drive wheels. The overall structure is compact, and the motor assembly 300 can be completely placed inside the wheel rim, avoiding interference between the motor and the surrounding system during steering. At the same time, a heat dissipation component is set up to achieve heat dissipation and ventilation.

[0033] Please see Figure 2 and Figure 3 .

[0034] In this embodiment, the parking brake 400 is fixed to the rear end cover, which can effectively save installation space while realizing parking braking.

[0035] Please see Figure 2 .

[0036] In some embodiments, the service brake 200 includes: a third end cover 220, which is fixedly connected to the first end cover 310; and a brake disc 210, which is disposed between the third end cover 220 and the wheel hub 600.

[0037] Please see Figure 4 and Figure 5 .

[0038] In this embodiment, the heat dissipation assembly includes: an air inlet 211 disposed on the outer circumferential end face of the brake disc 210; an air outlet disposed on the lateral end face of the brake disc 210; an air guide groove disposed on the circumferential side of the hub 600 corresponding to the air inlet; and a spiral ridge 221 disposed on the inner surface of the third end cover 220. In the specific implementation of this embodiment, the air inlet 211 is used for air intake, and the air outlet includes a main air outlet 212 and an auxiliary air outlet 213 for air exhaust. The air guide groove assists the air inlet 211 in intake. The gap between the ridges gradually decreases from the circumference to the center, and the airflow velocity increases as it flows from the circumference to the center, creating a suction effect on the air at the circumference, thus achieving heat dissipation and exhaust.

[0039] In this embodiment, the service brake 200 also includes two brake calipers. The two brake calipers are respectively radially mounted on the upper and lower parts of the third end cover 220 by mounting bolts 230. The brake calipers brake the wheels. The brake calipers are radially fixed, and the mounting bolts 230 are arranged radially, which saves installation space and provides a larger piston installation space for the brake calipers.

[0040] In this embodiment, the second end cap 320 is provided with an oil inlet 321, and the first end cap 310 is provided with two oil outlet pipes 311. A control oil passage is provided inside the motor body. The oil inlet 321 is connected to one end of each of the two oil outlet pipes 311 via the control oil passage, and the other ends of the two oil outlet pipes 311 are respectively connected to two brake calipers. Control oil enters the control oil passage through the oil inlet 321 and then flows into the two oil outlet pipes 311 to control the brake calipers.

[0041] Please see Figure 6 .

[0042] In some embodiments, the steering knuckle assembly 500 includes: a steering knuckle body 510, detachably connected to a mounting interface on the second end cap 320; a bracket 520, mounted on the end of the steering knuckle body 510 away from the motor assembly 300; and a steering arm 530 connected to the steering knuckle body 510, the steering knuckle body 510 being connected to a steering tie rod on the vehicle via the steering arm 530. Specifically, the bracket 520 has a symmetrical structure, identical on both sides. The steering arm 530 adopts a universal design, and is securely connected to the steering knuckle body 510 via two locating pins 532 and four fixing bolts 531. The steering knuckle body 510 is detachable from the second end cap 320 for easy replacement.

[0043] In this embodiment, a limiting block 511 is provided on the steering knuckle body 510, and an adjusting bolt 521 is provided on the bracket 520. The steering angle of the wheel is adjusted according to the tightening length of the adjusting bolt 521. When the adjusting bolt 521 contacts the limiting block 511, the steering angle of the wheel reaches its limit.

[0044] Please see Figure 2 and Figure 7 .

[0045] In this embodiment, the bracket 520 is provided with an oblique hole and a pin hole 522. The oblique hole and the pin hole 522 intersect. A wedge bolt 523 is installed in the oblique hole. A stop surface is provided on the wedge bolt 523. The stop surface contacts the pin in the pin hole 522 to prevent the pin from rotating. Compared with the prior art that uses screws for tightening, the surface contact can bear greater force.

[0046] In this embodiment, a high-voltage cable interface 322, an ABS sensor interface 323, and a cooling water interface 324 are provided above the second end cover 320. In the specific implementation of this embodiment, the high-voltage cable interface 322, the ABS sensor interface 323, and the cooling water interface 324 are led out from directly above the second end cover 320. The cooling water pipe and the high-voltage cable are routed closer to the steering center of the wheel, with minimal change in steering length. The ABS sensor and the high-voltage cable share the same route.

[0047] The second aspect of this embodiment provides an electric-driven off-road vehicle with electric-driven wheels.

[0048] As can be seen from the above technical solution, this application has at least the following advantages and positive effects:

[0049] An electric drive wheel disclosed in this application effectively integrates a steering knuckle assembly, a motor assembly, a planetary reducer, a service brake, and a parking brake, solving the overall integration and layout problem of high-power electric drive wheels. The overall structure is compact, and the motor assembly can be completely arranged inside the wheel rim, avoiding interference between the motor and the surrounding system during steering. At the same time, a heat dissipation assembly is provided to achieve heat dissipation and ventilation.

[0050] This application discloses an electric drive off-road vehicle that effectively integrates a steering knuckle assembly, a motor assembly, a planetary reducer, a service brake, and a parking brake by using electric drive wheels. This solves the overall integration and layout problem of high-power electric drive wheels, resulting in a compact overall structure. The motor assembly can be completely housed within the wheel rim, avoiding interference between the motor and surrounding systems during steering. Additionally, a heat dissipation assembly is provided to achieve heat dissipation and ventilation.

[0051] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention 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 the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. An electric drive wheel, suitable for high-power electric drive off-road vehicles, characterized in that, include: Wheel hub; The motor assembly includes a motor body, a first end cover, and a second end cover. The first end cover is disposed at the end of the motor body near the wheel hub, and the second end cover is disposed at the end of the motor body away from the wheel hub. A planetary reducer is used, and the power output end of the motor body is connected to the wheel hub through the planetary reducer. A service brake, wherein the service brake is sleeved on the end of the wheel hub near the first end cover, comprising: The third end cap is fixedly connected to the first end cap; A brake disc is disposed between the third end cover and the wheel hub; A heat dissipation assembly, disposed on the service brake and wheel hub, includes: An air inlet is provided on the outer circumferential end face of the brake disc; An air outlet is provided on the side end face of the brake disc; An air guide slot is located on the circumference of the wheel hub, corresponding to the air inlet hole; A spiral ridge is provided on the inner surface of the third end cap; A parking brake is installed on the second end cover; The steering knuckle assembly is detachably connected to the second end cap.

2. An electrically driven wheel according to claim 1, characterized in that, The service brake also includes two brake calipers, which are respectively radially mounted on the upper and lower parts of the third end cover by mounting bolts.

3. An electrically driven wheel according to claim 2, characterized in that, The second end cap is provided with an oil inlet hole, the first end cap is provided with two oil outlet pipes, the motor body is provided with a control oil passage, the oil inlet hole is connected to one end of the two oil outlet pipes through the control oil passage, and the other end of the two oil outlet pipes is connected to the two brake calipers respectively.

4. An electrically driven wheel according to claim 1, characterized in that, The steering knuckle assembly includes: The steering knuckle body is detachably connected to the mounting interface on the second end cover; The bracket is installed at the end of the steering knuckle body away from the motor assembly; The steering arm is connected to the steering knuckle body, and the steering knuckle body is connected to the steering tie rod on the vehicle via the steering arm.

5. An electrically driven wheel according to claim 4, characterized in that, The steering knuckle body is provided with a limit block, and the bracket is provided with an adjusting bolt. The steering angle of the wheel is adjusted according to the tightening length of the adjusting bolt. When the adjusting bolt contacts the limit block, the steering angle of the wheel reaches its limit.

6. An electrically driven wheel according to claim 4, characterized in that, The bracket is provided with an oblique hole and a pin hole. The oblique hole intersects with the pin hole. A wedge bolt is installed in the oblique hole. The wedge bolt is provided with a stop surface. The stop surface contacts the pin in the pin hole to prevent the pin from rotating.

7. An electrically driven wheel according to claim 1, characterized in that, The second end cap is equipped with a high-voltage cable interface, an ABS sensor interface, and a cooling water interface.

8. An electric-driven off-road vehicle, characterized in that, The off-road vehicle is equipped with electrically driven wheels as described in any one of claims 1 to 7.

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