CN111301149B

CN111301149B - Vibration-absorbing electric wheel

Info

Publication number: CN111301149B
Application number: CN202010142876.5A
Authority: CN
Inventors: 侯之超; 罗荣康; 吴佩宝; 黎瑞和
Original assignee: Tsinghua University
Current assignee: Tsinghua University
Priority date: 2020-03-04
Filing date: 2020-03-04
Publication date: 2022-04-19
Anticipated expiration: 2040-03-04
Also published as: CN111301149A

Abstract

The application relates to a vibration-absorbing electric wheel. The vibration absorption electric wheel comprises a hub, a motor, a moment guide mechanism, a bearing, a wheel carrier and a spring damping mechanism. The hub is used for being fixedly connected with the wheel rim. The motor includes an output shaft. The moment guiding mechanism is connected between the output shaft and the hub. The output shaft transmits the rotation torque to the hub through the torque guide mechanism. The inner ring of the bearing is fixed on the moment guide mechanism. The wheel carrier is fixed on the outer ring through the first connecting hole. The wheel carrier is used for being connected with the frame cantilever. The spring damping mechanism is connected between the motor and the wheel carrier. When the road bumps, the hub drives the motor to vibrate in the direction perpendicular to the ground. The spring damping mechanism absorbs the vibration of the motor, which is not directly transmitted to the sprung mass. The wheel carrier is connected with the motor through a spring damping mechanism. The vibration-absorbing electric wheel effectively absorbs the unsprung mass vibration of the automobile, inhibits the sprung mass vibration, and further improves the comfort of the electric wheel vehicle and reduces the motor vibration.

Description

Vibration-absorbing electric wheel

Technical Field

The application relates to the technical field of automobiles, in particular to a vibration absorption electric wheel.

Background

The electric wheel is a novel driving technology, and the motor is directly arranged in the wheel to drive, so that the electric wheel can replace the traditional transmission system. The weight of the transmission system is greatly reduced, the light weight of the automobile is facilitated, and the design space of the automobile body is expanded. The transmission chain of the electric wheel is short, the transmission efficiency is high, and the response of the driving force is faster.

But the motor is placed in the wheel and has increased unsprung mass, and the damping performance of vehicle descends, has not only reduced the travelling comfort of vehicle, also reduces in-wheel motor's life.

Disclosure of Invention

Based on this, a shock-absorbing motorized wheel is provided.

A vibration-absorbing electric wheel comprises a hub, a motor, a torque guide mechanism, a bearing, a wheel carrier and a spring damping mechanism. The hub is used for being fixedly connected with a wheel rim and forms a first space around the hub. The motor includes an output shaft. The torque guide mechanism is connected between the output shaft and the hub, and the output shaft transmits the rotating torque to the hub through the torque guide mechanism so as to drive the hub to rotate. The bearing includes an inner race and an outer race. The inner ring is fixed to the torque guide mechanism. The wheel frame is accommodated in the first space. The wheel carrier is provided with a first connecting hole. The wheel carrier is fixed on the outer ring through the first connecting hole. The wheel carrier is used for being connected with a frame cantilever. The spring damping mechanism is connected between the motor and the wheel carrier.

In one embodiment, the wheel carriage is bowl-shaped. The bottom of the bowl-shaped structure is provided with a first connecting hole. The bowl-shaped structure is surrounded to form a supporting space. The motor is accommodated in the supporting space.

In one embodiment, the bowl structure includes a central shaft. The motor is arranged symmetrically about the central axis.

In one embodiment, two first grooves are formed in the edge of the bowl-shaped structure. The two first grooves are symmetrically arranged about the central axis. The motor is correspondingly provided with two clamping blocks. The two clamping blocks are arranged in the two first grooves in a one-to-one correspondence mode. The number of the spring damping mechanisms is two. The two spring damping mechanisms are arranged in one-to-one correspondence with the two first grooves. And each spring damping mechanism is connected between the corresponding side wall of the first groove and the side wall of the fixture block.

In one embodiment, the extension and retraction directions of the two spring damping mechanisms are parallel.

In one embodiment, the fixture block comprises a first surface and a second surface which are oppositely arranged. The first groove comprises a first side face and a second side face which are oppositely arranged. The spring damping mechanism includes a first spring damper and a second spring damper. Two ends of the first spring damper are respectively abutted against the first surface and the first side surface. And two ends of the second spring damper are respectively abutted against the second surface and the second side surface.

In one embodiment, one end of the output shaft is a hollow ball structure. The hub is provided with a second connecting hole. The moment guide mechanism comprises a flange, a first spherical universal joint, a second spherical universal joint and a transmission shaft. The flange includes a base. The base body is of a cylinder structure. One end of the cylinder structure is fixed to the second connecting hole. The inner ring is fixed at the other end of the cylinder structure. The first ball-type universal joint is arranged in the barrel structure and can relatively slide in the barrel. The second ball-type universal joint is arranged in the hollow ball-type structure. The drive shaft includes a first end and a second end. The first end is connected with the first ball-type universal joint. The second end is connected with the second ball-type universal joint.

In one embodiment, the first ball-and-socket joint and the second ball-and-socket joint are each connected to the drive shaft by a spline.

In one embodiment, the shock-absorbing motorized wheel further comprises a braking mechanism. The braking mechanism is arranged between the wheel carrier and the wheel hub.

In one embodiment, the flange further comprises a flange plate. The flange plate is fixedly arranged on the cylinder structure. The cylinder structure is coaxial with the flange plate. And a second groove is correspondingly formed on the surface of the wheel carrier close to the hub. The brake mechanism includes a brake disc and a brake caliper. The brake disc cover is located the outer wall of base member, just the brake disc is fixed in wheel hub. The brake caliper is arranged in the second groove.

In one embodiment, the flange includes a first through hole. The brake disc includes a second through hole. The second through hole is arranged corresponding to the first through hole. The vibration absorption electric wheel also comprises a pin. The pin is used for fixing the flange plate and the brake disc on the hub through the first through hole and the second through hole.

The embodiment of the application provides inhale and shake electric wheel, including wheel hub, motor, moment guiding mechanism, bearing, wheel carrier and spring damping mechanism. The hub is used for being fixedly connected with a wheel rim and forms a first space around the hub. The motor includes an output shaft. The torque guide mechanism is connected between the output shaft and the hub. The output shaft transmits the rotating torque to the hub through the torque guide mechanism so as to drive the hub to rotate. The bearing includes an inner race and an outer race. The inner ring is fixed to the torque guide mechanism. The wheel frame is accommodated in the first space. The wheel carrier is fixed on the outer ring through the first connecting hole. The wheel carrier is used for being connected with a frame cantilever. The spring damping mechanism is connected between the motor and the wheel carrier.

When the road bumps, the hub drives the motor to vibrate in the direction perpendicular to the ground. The spring damping mechanism is connected between the motor and the wheel carrier, absorbs the vibration of the motor, and the vibration of the motor cannot be directly transmitted to the sprung mass. The vibration-absorbing electric wheel effectively absorbs unsprung mass vibration of an automobile and inhibits sprung mass vibration, so that the comfort of the vehicle with the vibration-absorbing electric wheel is improved, and the motor vibration is reduced.

Drawings

Fig. 1 is a schematic structural view of the shock-absorbing motorized wheel provided in an embodiment of the present application;

figure 2 is a side view of the shock absorbing motorized wheel provided in one embodiment of the present application;

fig. 3 is a schematic view of a partial structure a of the vibration-absorbing motorized wheel provided in an embodiment of the present application.

Reference numerals:

shock-absorbing motor-driven wheel 10

First space 101

Rim 110

Frame cantilever 120

Hub 20

Second connection hole 201

Motor 30

Output shaft 301

Moment guide mechanism 40

Bearing 50

Inner ring 510

Outer ring 520

Wheel carrier 60

First connection hole 601

Spring damping mechanism 70

Flange 410

Base 411

Flange 412

First ball-type gimbal 420

Second ball gimbal 430

Drive shaft 440

First end 441

Second end 442

First opening 602

Supporting space 603

Center shaft 604

First groove 610

First side 611

Second side 612

Fixture 310

First surface 311

Second surface 312

First spring 710

Second spring 720

Brake mechanism 80

Second groove 202

Brake disc 810

Brake caliper 820

First through hole 413

Second via 812

Pin 90

Spline 130

Detailed Description

In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying the present application are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is capable of embodiments in many different forms than those described herein and those skilled in the art will be able to make similar modifications without departing from the spirit of the application and it is therefore not intended to be limited to the embodiments disclosed below.

The numbering of the components as such, e.g., "first", "second", etc., is used herein only to distinguish the objects as described, and does not have any sequential or technical meaning. The term "connected" and "coupled" when used in this application, unless otherwise indicated, includes both direct and indirect connections (couplings). In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present application and for simplicity in description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be considered as limiting the present application.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

Referring to fig. 1 and 2, an embodiment of the present application provides a vibration-absorbing electric wheel 10 including a hub 20, a motor 30, a moment guide mechanism 40, a bearing 50, a wheel carrier 60, and a spring damping mechanism 70. The hub 20 is used for being fixedly connected with a rim 110 and forms a first space 101 around. The motor 30 includes an output shaft 301. The torque guide mechanism 40 is connected between the output shaft 301 and the hub 20, and the output shaft 301 transmits a rotation torque to the hub 20 through the torque guide mechanism 40 to drive the hub 20 to rotate. The bearing 50 includes an inner race 510 and an outer race 520. The inner race 510 is fixed to the torque guide mechanism 40. The wheel frame 60 is accommodated in the first space 101. The wheel carrier 60 is provided with a first connection hole 601. The wheel carrier 60 is fixed to the outer ring 520 through the first connection hole 601. The wheel carrier 60 is used to connect with the frame cantilever 120. The spring damping mechanism 70 is connected between the motor 30 and the wheel carrier 60.

When mounted for use, the frame 60 translates relative to the ground as the hub 20 rotates. The motor 30 can move in the vertical and ground directions relative to the wheel carrier 60.

According to the vibration-absorbing electric wheel 10 provided by the embodiment of the application, when a road bumps, the hub 20 drives the motor 30 to vibrate in a direction perpendicular to the ground. The spring damping mechanism 71 is connected between the motor 30 and the wheel carrier 60, the spring damping mechanism 70 absorbs vibration energy of the motor 30, and the vibration of the motor 30 is not directly transmitted to the sprung mass. The wheel carrier 60 is connected to the motor 30 through the spring damping mechanism 70. The vibration-absorbing electric wheel 10 effectively absorbs unsprung mass vibration of an automobile and suppresses sprung mass vibration, thereby improving the comfort of the electric wheel vehicle and reducing motor vibration.

Referring also to fig. 3, in one embodiment, the wheel frame 60 is a bowl-shaped structure. The bottom of the bowl-shaped structure is provided with a first connection hole 601. The bowl-like structure encloses a formation of a support space 603. The motor 30 is received in the supporting space 603.

The bottom of the bowl is located close to the hub 20 and the opening of the bowl is located away from the hub 20. The wheel frame 60 is accommodated in the first space 101. The motor 30 is received in the supporting space 603. The supporting space 603 belongs to the first space 101. The wheel carrier 60 is a bowl-shaped structure, so that the vibration absorption electric wheel 10 has a compact structure and a smaller volume.

The bowl-shaped wheel carriage 60 facilitates, on the one hand, the installation of the spring damping mechanism 70 and, on the other hand, the connection of the frame suspension 120 and the sealing of the motor 30.

In one embodiment, the bowl-like structure includes a central shaft 604. The motor 30 is symmetrically disposed about the central axis 604 to facilitate uniform force application.

In one embodiment, the rim of the bowl is formed with two first recesses 610. Two of the first grooves 610 are symmetrically disposed about the central axis 604. Two clamping blocks 310 are correspondingly arranged on the motor 30. The two clamping blocks 310 are correspondingly arranged in the two first grooves 610. The number of the spring damping mechanisms 70 is two. The two spring damping mechanisms 70 are disposed in one-to-one correspondence with the two first grooves 610. And each of the spring damping mechanisms 70 is connected between the sidewall of the corresponding first groove 610 and the sidewall of the latch 310.

In one embodiment, the extension and retraction directions of the two spring damping mechanisms 70 are parallel.

In one embodiment, the extension and retraction directions of the two spring damping mechanisms 70 are perpendicular to the driving surface.

In one embodiment, the latch 310 includes a first surface 311 and a second surface 312 that are oppositely disposed. The first groove 610 includes a first side 611 and a second side 612 disposed opposite to each other. The spring damping mechanism 70 includes a first spring damper 710 and a second spring damper 720. Both ends of the first spring damper 710 abut against the first surface 311 and the first side surface 611, respectively. The two ends of the second spring damper 720 abut against the second surface 312 and the second side surface 612, respectively.

In one embodiment, the extension and retraction directions of the first spring damper 710 and the second spring damper 720 are perpendicular to the driving surface. When the spring damper mechanism 70 is in the working state, the first spring damper 710 is in a state opposite to the compression state of the second spring damper 720.

The first groove 610 restricts the direction of motor vibration of the motor 30. The first spring 710 and the second spring 720 function to buffer and dissipate vibration energy.

In one embodiment, by varying the parameters of the first spring 710 and the second spring 720, the shock absorbing capacity can be varied so that the motor 30 can act as a shock absorbing mass for the unsprung mass and can act to absorb the unsprung mass vibrations of the vehicle, thereby indirectly damping the unsprung mass vibrations.

In one embodiment, one end of the output shaft 301 is a hollow ball structure. The hub 20 is provided with a second connecting hole 201. The torque vectoring mechanism 40 includes a flange 410, a first ball-type joint 420, a second ball-type joint 430 and a drive shaft 440. The flange 410 includes a base 411. The base 411 has a cylindrical structure. One end of the cylinder structure is fixed to the second connection hole 201. The inner ring 510 is fixed to the other end of the cylindrical structure. The first ball-type universal joint 420 is disposed in the cylinder structure and can relatively slide in the cylinder. The second ball gimbal 430 is disposed within the hollow ball structure. The drive shaft 440 includes a first end 441 and a second end 442. The first end 441 is coupled to the first ball-and-socket joint 420. The second end 442 is coupled to the second ball-and-socket joint 430.

In one embodiment, the first ball joint 420 and the second ball joint 430 are connected to the transmission shaft 440 by a spline 130, respectively.

The vibration-absorbing electric wheel 10 adopts a double universal structure to facilitate the output of the torque of the motor 30 and to transmit the vibration of the hub 20 to the motor 30.

In one embodiment, the shock-absorbing motorized wheel 10 further comprises a braking mechanism 80. The braking mechanism 80 is disposed between the wheel carrier 60 and the hub 20. The brake mechanism 80 is used for braking.

In one embodiment, the flange 410 further includes a flange plate 412. The flange 412 is fixedly disposed on the tubular structure. The cylindrical structure is coaxial with the flange 412. The surface of the wheel carrier 60 close to the hub 20 is correspondingly provided with a second groove 202. The brake mechanism 80 includes a brake disc 810 and a brake caliper 820. The brake disc 810 is sleeved on the outer wall of the base 411, and the brake disc 810 is fixed on the hub 20. The brake caliper 820 is disposed in the second groove 202. The flange plate 412 is adopted, so that the brake disc 810 can be fixed conveniently, and the structure is compact.

In one embodiment, the flange 412 includes a first through hole 413. The brake disk 810 includes a second through hole 812. The second through hole 812 is disposed corresponding to the first through hole 413. The shock-absorbing motorized wheel 10 further comprises a pin 90. The pin 90 fixes the flange 412 and the brake disk 810 to the hub 20 through the first through hole 413 and the second through hole 812.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-described examples merely represent several embodiments of the present application and are not to be construed as limiting the scope of the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A vibration-absorbing motorized wheel, comprising:

the wheel hub (20) is fixedly connected with a wheel rim (110) and forms a first space (101) around;

a motor (30), the motor (30) comprising an output shaft (301);

the torque guide mechanism (40) is connected between the output shaft (301) and the hub (20), and the output shaft (301) transmits the rotation torque to the hub (20) through the torque guide mechanism (40) so as to drive the hub (20) to rotate;

a bearing (50), the bearing (50) comprising an inner race (510) and an outer race (520), the inner race (510) being fixed to the torque vectoring mechanism (40);

the wheel carrier (60) is accommodated in the first space (101), a first connecting hole (601) is formed in the wheel carrier (60), the wheel carrier (60) is fixed to the outer ring (520) through the first connecting hole (601), and the wheel carrier (60) is used for being connected with the frame cantilever (120);

a spring damping mechanism (70) connected between the motor (30) and the wheel carrier (60);

one end of the output shaft (301) is of a hollow spherical structure, the hub (20) is provided with a second connecting hole (201), and the torque guide mechanism (40) comprises:

a flange (410), comprising:

the base body (411) is of a cylindrical structure, one end of the cylindrical structure is fixed to the second connecting hole (201), and the inner ring (510) is fixed to the other end of the cylindrical structure;

a first ball-type gimbal (420) disposed within the barrel structure and slidable within the barrel;

a second ball gimbal (430) disposed within the hollow ball structure; and

a drive shaft (440) including a first end (441) and a second end (442), the first end (441) being connected with the first ball-and-socket joint (420), the second end (442) being connected with the second ball-and-socket joint (430).

2. The vibration-absorbing motorized wheel of claim 1, wherein the wheel carrier (60) is a bowl-shaped structure, a first connection hole (601) is formed in a bottom of the bowl-shaped structure, the bowl-shaped structure forms a support space (603) around the bowl-shaped structure, and the motor (30) is received in the support space (603).

3. The vibration-absorbing motorized wheel of claim 2, wherein said bowl-like structure includes a central axis (604), said motor (30) being symmetrically disposed about said central axis (604).

4. The vibration-absorbing motorized wheel of claim 3, wherein the rim of the bowl-shaped structure is provided with two first grooves (610), the two first grooves (610) are symmetrically arranged about the central axis (604), the motor (30) is correspondingly provided with two clamping blocks (310), the two clamping blocks (310) are correspondingly arranged in the two first grooves (610) one by one, the number of the spring damping mechanisms (70) is two, the two spring damping mechanisms (70) are correspondingly arranged in the two first grooves (610), and each spring damping mechanism (70) is connected between the side wall of the corresponding first groove (610) and the side wall of the clamping block (310).

5. The vibration-absorbing motorized wheel of claim 4, wherein said latch (310) comprises a first surface (311) and a second surface (312) disposed opposite each other, said first recess (610) comprises a first side (611) and a second side (612) disposed opposite each other, and said spring damping mechanism (70) comprises:

a first spring damper (710), both ends of the first spring damper (710) abutting against the first surface (311) and the first side surface (611), respectively;

a second spring damper (720), wherein two ends of the second spring damper (720) are respectively abutted against the second surface (312) and the second side surface (612).

6. The vibration-absorbing motorized wheel of claim 1, wherein said first ball-type joint (420) and said second ball-type joint (430) are each connected to said drive shaft (440) by a spline (130).

7. The vibration-absorbing motorized wheel of claim 1, further comprising:

and a brake mechanism (80) provided between the wheel carrier (60) and the hub (20).

8. The vibration-absorbing electric wheel according to claim 7, wherein said flange (410) further comprises a flange (412), said flange (412) is fixedly disposed on said cylindrical structure, said cylindrical structure is coaxial with said flange (412), a second groove (202) is correspondingly formed on a surface of said wheel carrier (60) close to said hub (20), and said braking mechanism (80) comprises:

the brake disc (810), the brake disc (810) is sleeved on the outer wall of the base body (411), and the brake disc (810) is fixed on the hub (20);

a brake caliper (820) disposed in the second groove (202).

9. The vibration-absorbing motorized wheel according to claim 8, wherein said flange (412) comprises a first through hole (413), said brake disc (810) comprises a second through hole (812), said second through hole (812) being disposed in correspondence with said first through hole (413), said vibration-absorbing motorized wheel (10) further comprising:

a pin (90) for fixing the flange (412) and the brake disc (810) to the hub (20) through the first through hole (413) and the second through hole (812).