Vehicle and electric wheel thereof

Abstract

The utility model discloses a vehicle and an electric wheel thereof.The electric wheel comprises a tire installed on a hub, a hub motor arranged in the hub and a steering knuckle used for controlling the direction, and the hub motor is in driving connection with the hub through a flexible torque transmission mechanism; the hub motor comprises a shell, a gear ring rotationally arranged on the shell and at least one gear motor in driving connection with the gear ring, the end, close to a steering knuckle, of the shell is elastically connected to a frame through an upper pull rod, and the gear ring is connected to the flexible torque transmission mechanism. An output shaft of the gear motor is connected with a gear meshed with the gear ring, and the steering knuckle is connected to the hub motor in a sliding mode and connected to the flexible torque transmission mechanism in a rotating mode. The electric wheel is compact in structure, the sum of the weight of the multiple speed reducing motors is smaller than the weight of the hub motor for direct output, and therefore the overall weight of the electric wheel is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of new energy vehicles, and particularly relates to a vehicle and its electric wheel. Background Art

[0002] With the rapid development of new energy vehicles, the electric wheel technology has also developed rapidly, but many technical bottlenecks have not been broken through. From the perspective of the driving form of the electric wheel, the driving method of the electric wheel is mainly hub motor drive. The hub motor drive device can be directly installed in the cavity formed by the electric wheel hub, greatly reducing the axial space occupied by the motor, facilitating the installation of the vehicle steering system and suspension system, and indirectly optimizing the vehicle performance; however, the space inside the hub is limited. To save space, the hub motor is directly connected to the hub. To ensure sufficient output efficiency, the weight and volume of the hub motor are still relatively large, and the weight of a single hub motor exceeds 30KG, which is not conducive to the endurance of new energy vehicles. Therefore, improvements are needed. Summary of the Utility Model

[0003] The purpose of the present utility model is to provide a vehicle and its electric wheel to overcome the deficiencies in the prior art.

[0004] To achieve the above purpose, the present utility model provides the following technical solutions:

[0005] An embodiment of the present application discloses an electric wheel, including a tire installed on a hub, a hub motor disposed inside the hub, and a steering knuckle for controlling the direction. The hub motor is drivingly connected to the hub through a flexible torque transmission mechanism. The hub motor includes a housing, a gear ring rotatably disposed in the housing, and at least one reduction motor drivingly connected to the gear ring. One end of the housing close to the steering knuckle is elastically connected to a vehicle frame through an upper tie rod. The gear ring is connected to the flexible torque transmission mechanism. The output shaft of the reduction motor is connected to a gear meshing with the gear ring. The steering knuckle is slidably connected to the hub motor and rotatably connected to the flexible torque transmission mechanism. [[ID=2,1]]

[0006] Further, in the above electric wheel, the housing is a cylindrical structure with one end open, and a first through hole is opened in the closed end close to the steering knuckle, and a partition plate protrudes inward along the side wall of the first through hole. The steering knuckle is slidably connected to the corresponding partition plate through a guide rail. The reduction motor is fixed outside the closed end of the housing, and its output shaft penetrates into the interior of the housing and is connected to the corresponding gear.

[0007] Further, in the above electric wheel, an outer cover and an inner cover corresponding to the outer and inner circles of the gear ring are provided at the open end of the housing, and a second through hole is provided in the inner cover.

[0008] Furthermore, in the above-mentioned electric wheel, a connecting rod protrudes from the outer side of the closed end of the shell and is rotatably connected to the upper pull rod.

[0009] Furthermore, in the above-mentioned electric wheel, a center block protrudes from the side surface of the steering horn close to the hub motor, and the center block passes through the first through hole and the second through hole and is connected to the slider of the guide rail.

[0010] Furthermore, in the above-mentioned electric wheel, the flexible torque transmission mechanism includes an intermediate disk and a driving disk, a plurality of first axle pins are protruding from the side of the ring gear close to the intermediate disk, and a second axle pin is protruding from the side of the driving disk close to the intermediate disk, the first axle pin and the second axle pin are respectively rotatably connected to the connecting rod, and the end of the connecting rod away from the corresponding first axle pin and second axle pin is rotatably connected to the intermediate disk through a third axle pin, the driving disk is connected to the wheel hub, and a connecting shaft is protruding from the end face of the driving disk close to the intermediate disk, and the connecting shaft is rotatably connected to the steering horn.

[0011] Furthermore, in the above-mentioned electric wheel, the outer circumferential surface of the driving disc is provided with a brake disc, and a mounting frame is extended from the side of the steering horn close to the hub motor, and a brake caliper corresponding to the brake disc is provided.

[0012] Furthermore, in the above-mentioned electric wheel, an annular boss is protruding from the side of the brake disc facing away from the intermediate disc.

[0013] Furthermore, in the above-mentioned electric wheel, the connecting shaft is a hollow structure, and its inner wall is provided with driving teeth and is connected to a half shaft.

[0014] An embodiment of the present application also discloses a vehicle comprising the above-mentioned electric wheel.

[0015] Compared with the prior art, the advantages of the present invention are that the electric wheel has a compact structure, and the weight of multiple reduction motors is less than the weight of a hub motor with direct output, thereby reducing the overall weight of the electric wheel. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments recorded in this application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 Shown is a schematic structural diagram of an electric wheel in a specific embodiment of the present utility model.

[0018] Figure 2The figure shows a schematic structural diagram of an electric wheel after omitting the wheel hub and tire in a specific embodiment of the present utility model.

[0019] Figure 3 The figure shows an installation schematic diagram of a reduction motor in a specific embodiment of the present utility model.

[0020] Figure 4 The figure shows an installation schematic diagram of a guide rail in a specific embodiment of the present utility model.

[0021] Figure 5 The figure shows a meshing schematic diagram of a gear and a gear ring in a specific embodiment of the present utility model.

[0022] Figure 6 The figure shows a position schematic diagram of a brake caliper and a brake disc in a specific embodiment of the present utility model. Detailed implementation manners

[0023] Next, the technical solutions in the embodiments of the present utility model will be described in detail with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0024] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation of the present utility model. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0025] In the description of the present utility model, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0026] Refer Figures 1 to 6As shown in the figure, an electric wheel includes a tire 2 mounted on a wheel hub 1, a wheel hub motor 3 disposed inside the wheel hub 1, and a steering knuckle 4 for controlling the direction. The wheel hub motor 3 is drivingly connected to the wheel hub 1 through a flexible torque transmission mechanism 5. The wheel hub motor 3 includes a housing 31, a gear ring 32 rotatably disposed in the housing 31, and two reduction motors 33 drivingly connected to the gear ring 32. One end of the housing 31 close to the steering knuckle 4 is elastically connected to the vehicle frame through an upper tie rod 6. The gear ring 32 is connected to the flexible torque transmission mechanism 5. The output shaft of the reduction motor 33 is connected to a gear 34 meshing with the gear ring 32. The steering knuckle 4 is slidably connected to the wheel hub motor 3 and rotatably connected to the flexible torque transmission mechanism 5.

[0027] In this technical solution, the wheel hub and the tire are of conventional structures. The gear ring is rotatably disposed in the housing through conventional devices such as bearings and is connected to the flexible torque transmission mechanism. The total weight of the two reduction motors is less than 15 KG, and they are respectively fixed to the housing through conventional devices such as bolts. Their output shafts drive the gear to rotate through keys, etc., thereby driving the gear ring to rotate, and transmitting the torque to the wheel hub through the flexible torque transmission mechanism, so as to realize the rotation of the electric wheel. The reduction motor has the output advantage of low speed and high torque, which can reduce power consumption and further achieve the purpose of energy saving. The upper tie rod transfers the weight of the wheel hub motor to the vehicle frame, reducing the unsprung mass of the vehicle. One end of the upper tie rod is rotatably sleeved on the housing, and the other end is connected to the vehicle frame through a spring bracket. The spring bracket is a channel-shaped block. The top end of the upper tie rod is a cylindrical structure and slidably penetrates through the channel-shaped block, and springs are sleeved on both ends inside and outside the channel-shaped block. The springs are limited by conventional structures such as nuts. When the upper tie rod moves up or down, it is elastically connected to the spring bracket, reducing the influence of vibrations, etc. on the wheel hub motor. The steering knuckle is provided with an avoidance groove corresponding to the upper tie rod to avoid interference. The electric wheel has a compact structure, and the total weight of multiple reduction motors is less than the weight of a directly output wheel hub motor, thereby reducing the overall weight of the electric wheel.

[0028] Exemplarily, referring to Figures 1 to 5 As shown in the figure, the housing 31 is a cylindrical structure with one end open, and a first through hole is opened in the closed end close to the steering knuckle 4, and a partition 311 protrudes inward along the side wall of the first through hole. The steering knuckle 4 is slidably connected to the corresponding partition 311 through a guide rail 7. The reduction motor 33 is fixed to the outside of the closed end of the housing 31, and its output shaft penetrates into the interior of the housing 31 and is connected to the corresponding gear 34.

[0029] In this technical solution, the housing is a hollow cylindrical structure, and one end close to the steering knuckle is blocked by a sealing plate, while the other end is open. A rectangular first through hole is provided at the center of the sealing plate. Four partition plates are arranged along the side wall of the first through hole on the inner wall of the sealing plate (the side wall facing away from the steering knuckle), that is, a cuboid with both ends open is formed inside the housing. The sealing plate and the housing are integrally formed or fixed to each other by welding or other means. The guide rail is a conventional linear guide rail or the like, and is respectively fixed to the two vertically arranged partition plates by bolts or the like. The steering knuckle is connected to the slider of the guide rail. The reduction motor is fixed to the outer wall of the sealing plate by conventional bolts or the like. A circular hole corresponding to the output shaft of the reduction motor is provided inside the sealing plate. The output shaft of the reduction motor extends into the housing through the corresponding circular hole, and is drivingly connected with a gear by a conventional key or the like. The gear meshes with the toothed ring, and the reduction motor drives the toothed ring to rotate through the gear.

[0030] Exemplarily, referring to Figures 1 to 5 As shown, an outer sealing cover 312 and an inner sealing cover 313 corresponding to the outer ring and the inner ring of the toothed ring 32 are respectively provided at the open end of the housing 31. The inner sealing cover 313 is provided with a second through hole.

[0031] In this technical solution, the outer sealing cover and the inner sealing cover are respectively fixed to the sides of the housing and the partition plate by conventional devices such as screws. The outer ring and the inner ring of the toothed ring are respectively in clearance fit with the outer sealing cover and the inner sealing cover or are provided with conventional bearings or the like. As long as the outer sealing cover and the inner sealing cover do not interfere with the rotation of the toothed ring, the shape and size of the second through hole in the inner sealing cover are the same as those of the first through hole.

[0032] Exemplarily, referring to Figures 1 to 3 As shown, a connecting rod 314 protrudes from the outside of the closed end of the housing 31 and is rotatably connected to the upper pull rod 6.

[0033] In this technical solution, the connecting rod and the housing are integrally formed or fixed to each other by welding or other means. One end of the connecting rod close to the steering knuckle is rotatably connected to the bottom end of the upper pull rod by means of clearance fit or by providing conventional devices such as bearings. The steering knuckle is provided with a relief groove corresponding to the connecting rod and the upper pull rod.

[0034] Exemplarily, referring to Figures 1 to 5 As shown, a central block 41 protrudes from the inner side of the side of the steering knuckle 4 close to the hub motor 3. The central block penetrates through the first through hole and the second through hole and is connected to the slider of the guide rail 7.

[0035] In this technical solution, a central block protrudes from the inner side of the side of the steering knuckle close to the housing. The central block is integrally formed with or assembled and fixed to the steering knuckle. The central block penetrates through the first through hole and the second through hole and is slidably connected to the side wall of the corresponding partition plate through the guide rail. The guide rail is a conventional structure, and it is only necessary to realize the up and down sliding of the steering knuckle. When the wheel hub bumps, the steering knuckle bumps together with the wheel hub, avoiding acting on the hub motor.

[0036] For example, see Figures 1 to 6 As shown, the flexible torque transmission mechanism 5 includes an intermediate disk 51 and a driving disk 52. A plurality of first axle pins are protruded from the side of the ring gear 32 close to the intermediate disk 51, and a second axle pin is protruded from the side of the driving disk 52 close to the intermediate disk 51. The first axle pin and the second axle pin are respectively rotatably connected to the connecting rod 53. One end of the connecting rod 53 away from the corresponding first axle pin and second axle pin is rotatably connected to the intermediate disk 51 through the third axle pin. The driving disk 52 is connected to the wheel hub 1. A connecting shaft 521 is protruded from the end face of the driving disk 52 close to the intermediate disk 51, and the connecting shaft 521 is rotatably connected to the steering horn 4.

[0037] In this technical solution, the ring gear, the intermediate plate and the drive plate together form a flexible torque transmission mechanism with a flexible connection, which does not affect the transmission of the torque of the hub motor to the vehicle wheel hub. The vehicle wheel hub can vibrate up and down within the motion range of the flexible torque transmission mechanism, and the vibration frequency and amplitude will not be transmitted to the hub motor and the frame, thereby avoiding the wheel hub from generating a rigid thrust on the hub motor due to bumps, etc. The connecting shaft rotates through the steering clevis, and a bearing sleeved on the connecting shaft is provided in the center block of the steering clevis. The connecting shaft is axially fixed to the steering clevis by nuts and pins. The number of the first, second and third shaft pins is equal and the diameters are the same. They are fixed by threaded connection, interference connection or one-piece molding, etc., respectively. The two ends of the third shaft pin protrude from the intermediate plate respectively. , and is connected to the corresponding connecting rod, the first shaft pin, the second shaft pin and the third shaft pin are distributed at equal intervals in a circle of the same diameter, the connecting rod is a block structure, and is processed with two through holes, which are rotatably sleeved on the third shaft pin and the first shaft pin or the second shaft pin respectively. Conventional bearings / bushings and other devices can also be embedded in the through holes to improve the smoothness of rotation. When the wheel hub bumps, that is, when the driving disc shakes up and down, the intermediate disc can be radially offset relative to the driving disc, and the hub motor can be radially offset relative to the intermediate disc, and the steering horn and the center block are used to limit the wheel hub to achieve radial up and down offset relative to the hub motor, thereby avoiding the wheel hub from generating a rigid force on the intermediate and hub motors. At the same time, the impact of vibrations such as bumps on the hub motor is reduced, the use environment of the hub motor is improved, and its service life is extended.

[0038] For example, see Figure 2 、 Figure 3 and Figure 6 As shown, the outer circumferential surface of the driving disc 52 is covered with a brake disc 8, and a mounting frame 42 is extended from the side of the steering clevis 4 close to the hub motor 3, and a brake caliper 9 corresponding to the brake disc 8 is provided.

[0039] In this technical solution, the brake disc is nested in the outer cylindrical surface of the drive disc through interference fit, etc., making full use of the radial space in the wheel hub, increasing the contact area between the brake disc and the air, which is beneficial to the heat dissipation of the brake disc and reducing the impact of brake heat on the hub motor. The brake caliper is fixed to the mounting plate by bolts, etc.

[0040] Exemplarily, refer to Figure 2 , Figure 3 and Figure 6 As shown, a ring-shaped boss protrudes from the side of the brake disc 8 facing away from the intermediate disc 51.

[0041] In this technical solution, the ring-shaped boss is integrally formed with the brake disc, which improves the overall strength of the brake disc, and is connected to the driving disc through conventional bolts or the like, which improves the fixing strength between the brake disc and the driving disc.

[0042] Exemplarily, refer to Figures 1 to 6 As shown, the connecting shaft 521 is a hollow structure, and its inner wall is provided with driving teeth and is connected to a half shaft.

[0043] In this technical solution, the central block is a cylindrical structure, and bosses for installing bearings protrude from both ends respectively. Among them, one end of the central block is embedded in the steering knuckle for convenient installation. An installation boss protrudes from the outer wall of the boss near one end of the steering knuckle and is fixed to the steering knuckle through bolts or the like. The connecting shaft is rotatably connected to the central block through a bearing. One end of the connecting shaft facing away from the driving disc is axially fixed through a circlip or the like. A plane for installing a guide rail slider is machined on the outer wall of the central block for convenient installation. The half shaft is an existing structure, and a transmission tooth meshing with the driving tooth is provided on the outer wall of one end of the half shaft close to the connecting shaft. After the half shaft is inserted into the connecting shaft, it rotates synchronously with the connecting shaft. One end of the half shaft facing away from the steering knuckle is connected to the corresponding mechanism of the vehicle through a coupling or the like.

[0044] Exemplarily, a vehicle includes the above-mentioned electric wheel; in addition, the vehicle can be equipped with two electric wheels using permanent magnet synchronous reduction motors and two electric wheels using asynchronous reduction motors. During the starting or accelerating process, all four electric wheels are powered on and started. During the uniform driving process, the two electric wheels using permanent magnet synchronous reduction motors remain powered on, while the electric wheels using asynchronous reduction motors are powered off and rotate following the ground friction or the like. After being powered off, there is no magnetic field in the asynchronous reduction motor, reducing the resistance of its rotation.

[0045] In summary, the electric wheel has a compact structure, and the sum of the weights of multiple reduction motors is less than the weight of a directly output hub motor, thereby reducing the overall weight of the electric wheel, which is beneficial to extending the endurance of the vehicle.

[0046] It should be noted that, in this document, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variation thereof are intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the said element.

[0047] The above are only specific embodiments of the present application. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present application, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present application.

Claims

1. An electric wheel, characterized in that, It includes a tire installed on a wheel hub, a wheel hub motor disposed within the wheel hub, and a steering knuckle for controlling the direction. The wheel hub motor is drivingly connected to the wheel hub through a flexible torque transmission mechanism. The wheel hub motor includes a housing, a gear ring rotatably disposed in the housing, and at least one reduction motor drivingly connected to the gear ring. One end of the housing close to the steering knuckle is elastically connected to a vehicle frame through an upper tie rod. The gear ring is connected to the flexible torque transmission mechanism. The output shaft of the reduction motor is connected to a gear meshing with the gear ring. The steering knuckle is slidably connected to the wheel hub motor and rotatably connected to the flexible torque transmission mechanism.

2. The electric wheel according to claim 1, wherein: The housing is a cylindrical structure with one end open. A first through hole is formed in the closed end close to the steering knuckle, and a partition plate protrudes inward along the side wall of the first through hole. The steering knuckle is slidably connected to the corresponding partition plate through a guide rail. The reduction motor is fixed to the outside of the closed end of the housing, and its output shaft penetrates into the interior of the housing and is connected to the corresponding gear.

3. The electric wheel according to claim 2, wherein: An outer cover and an inner cover corresponding to the outer and inner circles of the gear ring are provided at the open end of the housing. The inner cover is provided with a second through hole.

4. The electric wheel according to claim 2, wherein: A connecting rod protrudes from the outside of the closed end of the housing and is rotatably connected to the upper tie rod.

5. The electric wheel according to claim 2, characterized in that: A central block protrudes from the side of the steering knuckle close to the wheel hub motor. The central block penetrates through the first through hole and the second through hole and is connected to the slider of the guide rail.

6. The electric wheel according to claim 1, characterized in that: The flexible torque transmission mechanism includes an intermediate disk and a driving disk. A plurality of first pins protrude from the side of the gear ring close to the intermediate disk. Second pins protrude from the side of the driving disk close to the intermediate disk. The first pins and the second pins are respectively rotatably connected to a connecting rod. One end of the connecting rod facing away from the corresponding first pin and second pin is rotatably connected to the intermediate disk through a third pin. The driving disk is connected to the wheel hub. A connecting shaft protrudes from the end face of the driving disk close to the intermediate disk. The connecting shaft is rotatably connected to the steering knuckle.

7. The electric wheel according to claim 6, characterized in that: A brake disk is sleeved on the outer circumferential surface of the driving disk. An installation bracket extends from the side of the steering knuckle close to the wheel hub motor, and a brake caliper corresponding to the brake disk is provided.

8. The electric wheel according to claim 7, characterized in that: A ring-shaped boss protrudes from the side of the brake disk facing away from the intermediate disk.

9. The electric wheel according to claim 7, characterized in that: The connecting shaft is of a hollow structure, and a driving tooth is provided on its inner wall and is connected to a half shaft.

10. A vehicle, characterized in that, It includes an electric wheel according to any one of claims 1 to 9.

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