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, the hub motor is in driving connection with the hub through a flexible torque transmission mechanism, and the steering knuckle is slidably connected with the hub motor; the steering knuckle is rotatably connected to the flexible torque transmission mechanism, the flexible torque transmission mechanism is connected with a brake disc, and the steering knuckle is provided with brake calipers corresponding to the brake disc. The electric wheel is compact in structure, the brake disc is arranged on the flexible torque transmission mechanism, the brake calipers are arranged on the steering claw, the structure is simplified, occupied space in the hub is reduced, the brake disc is arranged outside the hub motor, and heat dissipation is facilitated.

Description

Technical Field

[0001] This 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 technology of electric wheels has also developed rapidly, but many technical bottlenecks have not been broken through. From the perspective of the driving form of electric wheels, the driving method of electric wheels 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; in order to reduce the space utilization rate, the braking structure is mostly integrated in the hub motor, but the braking structure mostly uses heat dissipation pads and heat dissipation reinforcing ribs to achieve heat dissipation. Due to the disadvantages such as the heat softening of the heat dissipation pad material, the heat dissipation effect is not good, seriously affecting the service life of the motor. Therefore, improvements are needed. Utility Model Content

[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 this application discloses an electric wheel, including a tire installed on a hub, a hub motor disposed within 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 steering knuckle is slidably connected to the hub motor and rotatably connected to the flexible torque transmission mechanism. The flexible torque transmission mechanism is connected with a brake disc, and the steering knuckle is provided with a brake caliper corresponding to the brake disc.

[0006] Further, in the above electric wheel, a through groove is provided on a stator bracket of the hub motor, and the steering knuckle is slidably disposed within the through groove through a guide rail.

[0007] Further, in the above electric wheel, the stator bracket of the hub motor is elastically connected to a vehicle frame through an upper pull rod.

[0008] Further, in the above electric wheel, the flexible torque transmission mechanism includes an intermediate disc and a driving disc. A plurality of first shaft pins protrude from a side surface of a front cover of the hub motor close to the intermediate disc. Second shaft pins protrude from a side surface of the driving disc close to the intermediate disc. The first shaft pins and the second shaft pins are respectively rotatably connected to a connecting rod. One end of the connecting rod facing away from the corresponding first shaft pin and second shaft pin is rotatably connected to the intermediate disc through a third shaft pin. The driving disc is connected to the hub, and a connecting shaft protrudes from an end surface of the driving disc close to the intermediate disc. The connecting shaft is rotatably connected to the steering knuckle.

[0009] Further, in the above-mentioned electric wheel, the brake disc is sleeved on the outer circumferential surface of the driving disc, and an installation bracket for installing a brake caliper extends from the side surface of the steering knuckle near the hub motor.

[0010] Further, in the above-mentioned electric wheel, spaced bosses protrude from the side surface of the brake disc facing away from the intermediate disc.

[0011] Further, in the above-mentioned electric wheel, the connecting shaft has a hollow structure, and driving teeth are provided on its inner wall and connected to a half shaft.

[0012] Further, in the above-mentioned electric wheel, the connecting shaft protrudes from the steering knuckle and is inserted into the brake disc, and the brake caliper is fixed to the side surface of the steering knuckle close to the brake disc.

[0013] Further, in the above-mentioned electric wheel, a plurality of tooth grooves are machined on the inner ring of the brake disc, and braking teeth meshing with the tooth grooves are provided on the surface of the connecting shaft.

[0014] The embodiment of the present application also discloses a vehicle, including the above-mentioned electric wheel.

[0015] Compared with the prior art, the advantages of the present utility model are as follows: The structure of the electric wheel is simple. The brake disc is arranged on the flexible torque transmission mechanism, and the brake caliper is arranged on the steering knuckle, which simplifies the structure and reduces the occupation of the space inside the hub. The brake disc is arranged outside the hub motor, reducing the influence of the heat generated by braking on the hub motor. Description of the Drawings

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings described below are only some embodiments recorded in the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0017] Figure 1 The following shows the structural schematic diagram of the electric wheel in a specific embodiment of the present utility model.

[0018] Figure 2 The following shows the three-dimensional schematic diagram of the electric wheel in a specific embodiment of the present utility model.

[0019] Figure 3 The following shows the cross-sectional schematic diagram of the electric wheel in a specific embodiment of the present utility model.

[0020] Figure 4The following shows an exploded view of a brake disc and a drive disc in a specific embodiment of the present utility model.

[0021] Figure 5 The following shows a structural schematic diagram of a steering knuckle in a specific embodiment of the present utility model.

[0022] Figure 6 The following shows a structural schematic diagram of a drive disc in a specific embodiment of the present utility model.

[0023] Figure 7 The following shows a structural schematic diagram of a brake disc in a specific embodiment of the present utility model.

[0024] Figure 8 The following shows an exploded view of a brake disc, a drive disc, a steering knuckle and a half shaft in another specific embodiment of the present utility model.

[0025] Figure 9 The following shows a cross-sectional view of a brake disc, a drive disc, a steering knuckle and a half shaft in another specific embodiment of the present utility model.

[0026] Figure 10 The following shows a structural schematic diagram of an electric wheel in yet another specific embodiment of the present utility model.

[0027] Figure 11 The following shows a three-dimensional view of an electric wheel in yet another specific embodiment of the present utility model.

[0028] Figure 12 The following shows a cross-sectional view of an electric wheel in yet another specific embodiment of the present utility model.

[0029] Figure 13 The following shows a structural schematic diagram of a steering knuckle in yet another specific embodiment of the present utility model.

[0030] Figure 14 The following shows a structural schematic diagram of a brake disc in yet another specific embodiment of the present utility model.

[0031] Figure 15 The following shows a structural schematic diagram of a drive disc in yet another specific embodiment of the present utility model. Detailed implementation manners

[0032] 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 of 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.

[0033] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It 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 therefore should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0034] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", "connected to" 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.

[0035] As shown Figures 1 to 15 An electric wheel, as shown, includes a tire 2 installed on a wheel hub 1, a hub motor 3 disposed inside the wheel hub 1, and a steering knuckle 4 for controlling the direction. The hub motor 3 is drivingly connected to the wheel hub 1 through a flexible torque transmission mechanism 5. The steering knuckle 4 is slidably connected to the hub motor 3 and rotatably connected to the flexible torque transmission mechanism 5. The flexible torque transmission mechanism 5 is connected with a brake disc 6, and the steering knuckle 4 is provided with a brake caliper 7 corresponding to the brake disc 6.

[0036] In this technical solution, the wheel hub and the tire are of conventional structures. The hub motor is an outer rotor motor, including a front cover, a sealing ring, a rotor, a stator, a stator bracket, motor bearings, and a motor rear cover. The flexible torque transmission mechanism is connected to the front cover and transmits the torque of the hub motor to the wheel hub to drive the rotation of the wheel hub and the tire, thereby driving the vehicle. The steering knuckle is connected to the steering mechanism of the vehicle and is used to adjust the direction of the vehicle. The specific connection structures and principles all belong to the prior art and will not be elaborated here one by one. The brake disc is connected to the flexible torque transmission mechanism instead of being integrated inside the hub motor, which is beneficial to heat dissipation. The brake caliper is disposed on the steering knuckle, simplifying the structure and reducing the space occupation inside the wheel hub.

[0037] Exemplarily, as shown in Figures 1 to 4 and Figure 10 and Figure 11 As shown, the stator bracket of the hub motor 3 is provided with a through groove, and the steering knuckle 4 is slidably disposed in the through groove through a guide rail 8.

[0038] In this technical solution, a central block protrudes inwardly on the side of the steering knuckle near the hub motor. The central block is integrally formed with or assembled and fixed to the steering knuckle. The central block penetrates through the through groove of the stator bracket and is slidably connected to the side wall of the through groove through a guide rail. The guide rail is a conventional structure and is installed in the chute to enable the up and down sliding of the steering knuckle. When the hub bumps, the steering knuckle bumps together with the hub, preventing it from acting on the hub motor.

[0039] Exemplarily, refer to Figures 1 to 3 and Figure 10 and Figure 11 As shown, the stator bracket of the hub motor is elastically connected to the vehicle frame through an upper pull rod 9.

[0040] In this technical solution, a connecting rod protrudes on the side of the stator bracket near the steering knuckle. One end of the upper pull rod is rotatably sleeved on the connecting rod, 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 pull rod is a cylindrical structure and slidably penetrates through the channel-shaped block. Springs are sleeved on both ends of the upper pull rod located inside and outside the channel-shaped block. The springs are limited by conventional structures such as nuts. When the upper pull rod moves up or down, it is elastically connected to the spring bracket, reducing the impact of vibrations and the like on the hub motor. The steering knuckle is provided with an avoidance groove corresponding to the upper pull rod to avoid interference.

[0041] Exemplarily, refer to Figures 1 to 7 As shown, the flexible torque transmission mechanism 5 includes an intermediate disk 51 and a driving disk 52. A plurality of first pins protrude from the side of the front cover of the hub motor 3 near the intermediate disk 51. Second pins protrude from the side of the driving disk 52 near the intermediate disk 51. The first pins and the second pins are respectively rotatably connected to a connecting rod. One end of the connecting rod away from the corresponding first pin and second pin is rotatably connected to the intermediate disk 51 through a third pin. The driving disk 52 is connected to the hub 1. A connecting shaft 521 protrudes from the end face of the driving disk 52 near the intermediate disk 51, and the connecting shaft 521 is rotatably connected to the steering knuckle 4.

[0042] In this technical solution, the front cover of the in-wheel motor, the middle disc and the driving disc together form a flexible torque transmission mechanism with flexible connection, which does not affect the transmission of the torque of the in-wheel motor to the vehicle wheel hub. The vehicle wheel hub can vibrate up and down within the movement range of the flexible torque transmission mechanism, and the vibration frequency and amplitude will not be transmitted to the in-wheel motor and the vehicle frame, avoiding the rigid thrust on the in-wheel motor and other components due to bumps of the wheel hub. The connecting shaft rotates through the steering knuckle, and a bearing sleeved on the connecting shaft is arranged in the central block of the steering knuckle. The connecting shaft is axially fixed to the steering knuckle through a nut, a pin and other components. The numbers of the first pin, the second pin and the third pin are equal, and their diameters are the same. They are fixed by means of threaded connection, interference connection or integral molding respectively. Among them, both ends of the third pin protrude from the middle disc and are connected to the corresponding connecting rods. The first pin, the second pin and the third pin are equally spaced within a circle of the same diameter size. The connecting rod is a block structure and is processed with two through holes, which are respectively rotatably sleeved on the third pin and the first pin or the second pin. Conventional bearing / bushing 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 middle disc can radially offset relative to the driving disc, and the in-wheel motor can radially offset relative to the middle disc. With the limit of the steering knuckle and the central block, the wheel hub can radially offset up and down relative to the in-wheel motor, avoiding the rigid force of the wheel hub on the middle part and the in-wheel motor. At the same time, the impact of bumps and other vibrations on the in-wheel motor is reduced, the use environment of the in-wheel motor is improved, and its service life is prolonged.

[0043] Exemplarily, referring to Figures 1 to 7 As shown, the brake disc 6 is sleeved on the outer circular surface of the driving disc 52, and an installation bracket 41 for installing the brake caliper 7 extends from the side of the steering knuckle 4 close to the in-wheel motor 3.

[0044] In this technical solution, the brake disc is nested on the outer circular surface of the driving disc by means of interference fit, etc., making full use of the radial space inside the wheel hub, increasing the contact area between the brake disc and the air, being beneficial to the heat dissipation of the brake disc, and reducing the influence of braking heat on the in-wheel motor. The installation bracket includes a support rod connected to the steering knuckle and an installation plate fixed to the support rod. The brake caliper is fixed to the installation plate through bolts and other components.

[0045] Exemplarily, referring to Figures 1 to 7 As shown, spaced bosses 61 protrude from the side of the brake disc 6 facing away from the middle disc 51.

[0046] In this technical solution, the spaced bosses are integrally formed with the brake disc, improving the overall strength of the brake disc. The mounting bolts of the wheel hub pass through the spaced bosses and are then connected to the driving disc.

[0047] Exemplarily, referring to Figure 8 and Figure 9 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 10.

[0048] In this technical solution, the spacing boss avoids the contact part between the wheel hub and the drive disc, reducing the occupation of the axial space. The spacing boss installs the brake disc on the drive disc by bolts, etc. The center block is a cylindrical structure, and bosses for installing bearings are protruding from both ends. Among them, one end of the center block is embedded in the steering horn for easy installation, and the outer wall of the boss close to the end of the steering horn is protruding with a mounting boss and is fixed to the steering horn by bolts, etc. The connecting shaft is rotatably connected to the center block through a bearing, and the end of the connecting shaft away from the drive disc is axially fixed by a retaining spring, etc. The outer wall of the center block is processed with a plane for installing the guide rail slider for easy installation. The mounting frame is an L-shaped structure and is integrally formed with the steering horn. The half-shaft is an existing structure, and the outer wall of the end close to the connecting shaft is provided with a transmission tooth meshing with the driving tooth. After the half-shaft is inserted into the connecting shaft, it rotates synchronously with the connecting shaft, and the end of the half-shaft away from the steering horn is connected to the corresponding mechanism of the vehicle through a coupling, etc.

[0049] For example, see Figures 10 to 15 As shown, the connecting shaft 521 protrudes from the steering clevis 4 and is plugged into the brake disc 6 , and the brake caliper 7 is fixed to the side of the steering clevis 4 close to the brake disc 6 .

[0050] In this technical solution, the drive disc is directly fixed to the wheel hub, the connecting shaft passes through the steering clevis and the brake disc, and the brake disc is axially fixed by nuts, etc. The brake disc actively abuts against the steering clevis through bearings, etc., and moves synchronously with the drive disc. The brake caliper is fixed to the steering clevis by bolts, etc., and is arranged corresponding to the brake disc.

[0051] For example, see Figures 10 to 15 As shown, the inner ring of the brake disc 6 is processed with a plurality of tooth grooves, and the surface of the connecting shaft 521 is provided with brake teeth that mesh with the tooth grooves.

[0052] In this technical solution, the synchronous movement of the brake disc and the drive disc is achieved through the cooperation of the mutually meshing brake teeth and tooth grooves.

[0053] Exemplarily, a vehicle comprises the above-mentioned electric wheel.

[0054] To sum up, the electric wheel has a simple structure, the brake disc is arranged on the flexible torque transmission mechanism, and the brake caliper is arranged on the steering horn, which simplifies the structure and reduces the space occupied inside the wheel hub. The brake disc is arranged outside the wheel hub motor, which is conducive to heat dissipation.

[0055] It should be noted that in this text, 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 variant thereof are intended to cover non-exclusive inclusion, so 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 existence of additional identical elements in the process, method, article or device comprising said element.

[0056] The above are only specific embodiments of the present application. It should be noted 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 mounted on a wheel hub, a hub motor arranged in the wheel hub and a steering clevis for controlling direction, wherein the hub motor is driven and connected to the wheel hub through a flexible torque transmission mechanism, the steering clevis is slidably connected to the hub motor and rotatably connected to the flexible torque transmission mechanism, the flexible torque transmission mechanism is connected to a brake disc, and the steering clevis is provided with a brake caliper corresponding to the brake disc.

2. The electric wheel according to claim 1, characterized in that: The stator bracket of the hub motor is provided with a through slot, and the steering horn is slidably arranged in the through slot through a guide rail.

3. The electric wheel according to claim 1, characterized in that: The stator bracket of the wheel hub motor is elastically connected to the vehicle frame through an upper pull rod.

4. 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 axle pins are protruding from the side of the front cover of the hub motor close to the intermediate disk. Second axle pins are protruding from the side of the driving disk close to the intermediate disk. The first axle pins and the second axle pins are respectively rotatably connected to the connecting rod. One 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. 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 horn.

5. The electric wheel according to claim 4, characterized in that: The brake disc is sleeved on the outer circumferential surface of the driving disc, and a mounting frame for mounting a brake caliper is extended from the side of the steering horn close to the wheel hub motor.

6. The electric wheel according to claim 5, characterized in that: A spacing boss protrudes from the side of the brake disc away from the intermediate disc.

7. The electric wheel according to claim 5, characterized in that: The connecting shaft is a hollow structure, and the inner wall thereof is provided with driving teeth and is connected with a half shaft.

8. The electric wheel according to claim 4, characterized in that: The connecting shaft protrudes from the steering horn and is plugged into the brake disc. The brake caliper is fixed to the side of the steering horn close to the brake disc.

9. The electric wheel according to claim 7, characterized in that: The inner ring of the brake disc is processed with a plurality of tooth grooves, and the surface of the connecting shaft is provided with brake teeth meshing with the tooth grooves.

10. A vehicle, characterized in that: The invention comprises the electric wheel as described in any one of claims 1 to 8.

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