CN218702689U - Wheel structure and vehicle - Google Patents

Abstract

The application relates to a wheel structure, including rim, motor, reduction gear and support piece. The motor has a drive shaft and the reducer has an input shaft and an output shaft. The input shaft is connected with the driving shaft, and the output shaft is connected with the wheel rim. The support member is sleeved outside the output shaft, and the rim is rotatably arranged outside the support member, so that the support member can bear bending moment from the rim. The application provides a wheel structure can be through the output axial rim transmission of reduction gear by the moment of torsion of the drive shaft output of motor, and bear the moment of flexure through the support piece of cover establishing outside the output shaft of reduction gear, has avoided the output shaft of reduction gear to bear the moment of flexure when transmitting the moment of torsion, realizes the moment of flexure decoupling to the life of output shaft has been promoted.

Description

Wheel structure and vehicle

Technical Field

The application relates to the technical field of vehicles, in particular to a wheel structure and a vehicle.

Background

The wheels are one of the important structures of the vehicle, can drive the vehicle to move and bear the weight of the whole vehicle. The present electric wheel generally outputs torque from an electric motor, and transmits the torque to a wheel via a transmission mechanism to control the direction of the wheel, and thus the traveling direction of the vehicle. However, in the wheel structure in some embodiments, since the rim bears the weight of the whole vehicle, and the output shaft of the wheel structure is connected to the rim, the output torque of the transmission mechanism to the output shaft of the wheel is transmitted not only by the torque from the motor, but also by the force applied to the output shaft by the rim, i.e., by the bending moment, so that the service life of the shaft is reduced.

Disclosure of Invention

Based on this, provide a wheel structure and vehicle that can avoid output torque to the output shaft of wheel bears the moment of flexure to solve the lower problem of output shaft life-span.

An aspect of the present application provides a wheel structure, including:

a rim;

a motor having a drive shaft;

a reducer having an input shaft and an output shaft; the input shaft is connected with the driving shaft, and the output shaft is connected with the rim;

the support piece is sleeved outside the output shaft, and the rim is rotatably arranged outside the support piece so that the support piece can bear bending moment from the rim.

In one embodiment, the support and the output shaft have a gap therebetween.

In one embodiment, the wheel structure includes a first bearing;

the first bearing is sleeved outside the support piece, and the rim is rotationally connected with the support piece by means of the first bearing.

In one embodiment, the rim is rotatably disposed about a first axis of rotation outside the support;

wherein the first axis of rotation coincides with the axis of the output shaft.

In one embodiment, the reducer further comprises a planet carrier, a sun gear, a planet gear and a ring gear;

the sun gear is connected with the input shaft, and the planet carrier is connected between the planet gear and the output shaft;

the gear ring is connected with the supporting piece, and the planet wheel is respectively meshed with the sun wheel and the gear ring.

In one embodiment, the reducer further comprises a second bearing, and the planet carrier comprises a first carrier body and a second carrier body which are connected with each other;

the first frame body is connected with the output shaft, and the second bearing is sleeved outside the output shaft;

wherein the sun gear and the output shaft are configured to be rotatable relative to the second carrier body of the carrier by means of the second bearing.

In one embodiment, the wheel structure further comprises a retaining member;

the two axial ends of the second bearing respectively abut against the locking piece and the sun wheel, so that the second bearing is locked and fixed between the locking piece and the sun wheel.

In one embodiment, the locking member is threadedly coupled to the second frame of the carrier.

In one embodiment, the wheel structure further comprises a brake member;

the brake member is configured to be capable of braking the motor.

In another aspect of the present application, there is also provided a vehicle including the wheel structure described above.

Above-mentioned wheel structure and vehicle, wheel structure include rim, motor, reduction gear and support piece at least, and the wheel structure can bear the moment of torsion that comes from the rim through the output shaft of reduction gear to the rim transmission, and the support piece through the cover is established outside the output shaft of reduction gear bears the moment of torsion from the rim, has avoided the output shaft of reduction gear to bear the moment of torsion when transmitting the moment of torsion, realizes moment decoupling zero to the life of output shaft has been promoted.

Drawings

FIG. 1 is a schematic structural diagram of a wheel structure according to an embodiment of the present application;

FIG. 2 is a schematic illustration of a wheel construction according to an embodiment of the present application;

fig. 3 is a partial structural schematic view of a wheel structure according to an embodiment of the present application.

Description of reference numerals:

100. a wheel structure; 110. a rim; 120. a motor; 121. a drive shaft; 122. a housing; 123. a stator; 124. a rotor; 130. a speed reducer; 131. an input shaft; 132. an output shaft; 1321. a torque section; 1322. A fixed part; 133. an end cap; 134. a planet carrier; 1341. a first frame body; 1342. a second frame body; 135. A sun gear; 136. a planet wheel; 137. a second bearing; 138. a ring gear; 139. a third bearing; 140. a support member; 141. a connecting portion; 1411. a first step portion; 1412. a second step portion; 142. a bending moment part; 150. A first bearing; 160. a locking member; 170. a stopper; 180. an adjustment member; a. a first accommodating space; b. A second accommodating space.

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 embodiment 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 therefore the application is not limited to the specific embodiments disclosed below.

In the description of the present application, it is to be understood that the terms "central," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and to simplify the description, but are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the present application.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In this application, unless expressly stated or limited otherwise, a first feature is "on" or "under" a second feature such that the first and second features are in direct contact, or the first and second features are in indirect contact via an intermediary. 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.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. As used herein, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are for purposes of illustration only and do not denote a single embodiment.

Furthermore, the drawings are not 1:1, and the relative dimensions of the various elements in the figures are drawn for illustration only and not necessarily to true scale.

For the purpose of illustration, the drawings show only the structures associated with the embodiments of the application.

FIG. 1 illustrates a schematic structural view of a wheel structure 100 in one embodiment of the present application; fig. 2 shows a schematic view of a wheel structure 100 in an embodiment of the present application.

Referring to fig. 1 and 2, a wheel structure 100 according to an embodiment of the present disclosure includes a rim 110, a motor 120, a reducer 130, and a support 140. The motor 120 has a drive shaft 121, and the reducer 130 has an input shaft 131 and an output shaft 132. The input shaft 131 is connected to the drive shaft 121 and the output shaft 132 is connected to the rim 110. The support 140 is sleeved outside the output shaft 132, and the rim 110 is rotatably disposed outside the support 140, so that the support 140 bears the bending moment from the rim 110.

It should be noted that the torque refers to a specific moment that causes the object to rotate. The bending moment is the moment of the couple of distributed internal force systems perpendicular to the cross section, i.e. the moment required for bending. Coupling refers to the phenomenon of two or more systems, or two forms of motion, interacting with each other to join them together. Decoupling refers to the process of separating the two motions. In some embodiments, the wheel structure is configured such that the rim bears the weight of the entire vehicle, and the output shaft of the wheel structure is connected to the rim, so that the output shaft not only transmits the torque from the motor, but also bears the force applied by the rim to the output shaft, i.e., the bending moment.

In the wheel structure 100 of the present application, the torque output by the driving shaft 121 of the motor 120 can be transmitted to the rim 110 through the output shaft 132 of the speed reducer 130, and the bending moment from the rim 110 is borne by the supporting member 140 sleeved outside the output shaft 132 of the speed reducer 130, so that the output shaft 132 of the speed reducer 130 is prevented from bearing the bending moment while transmitting the torque, and bending moment decoupling is achieved, thereby prolonging the service life of the output shaft 132.

Referring to fig. 1, in some embodiments, the support 140 has a gap with the output shaft 132. In conjunction with some embodiments described below, the support member 140 is connected to the housing 122 of the motor 120 so that it does not rotate during operation of the vehicle. The output shaft 132 needs to output the torque from the driving shaft 121 of the motor 120 to rotate, so that the output shaft 132 and the support 140 rotate relatively. Thus, friction generated by relative rotation between the support 140 and the output shaft 132 can be avoided by the gap, so as to improve the easiness of torque transmission of the output shaft 132, and avoid the support 140 from bearing extra torque due to friction when bearing bending moment. Moreover, when the support member 140 is subjected to a bending moment, the gap can prevent the support member 140 from being deformed to contact with the output shaft 132, thereby preventing the output shaft 132 from being subjected to the bending moment due to the contact.

With continued reference to fig. 1, in some embodiments, the wheel structure 100 includes a first bearing 150. The first bearing 150 is sleeved outside the support 140, and the rim 110 is rotatably connected to the support 140 by the first bearing 150. Thus, the first bearing 150 can restrict the movement of the support member 140 in the axial and radial directions thereof, on the other hand, can reduce the friction coefficient between the support member 140 and the rim 110, and facilitates the smooth rotation of the rim 110 relative to the support member 140, while ensuring the revolution accuracy of the rim 110. Optionally, the first bearing 150 is a tapered roller bearing. The tapered roller bearing is a radial thrust type rolling bearing in which the rolling elements are tapered rollers. The tapered roller bearing is mainly used for bearing combined radial and axial loads mainly comprising radial loads. The bearing capacity is large, and the limit rotating speed is low. Since the tapered roller bearing is conical in shape and the conical shape has a certain angle, it can easily receive loads in various directions. Axial thrust and radial loads can be better withstood than spherical, cylindrical or needle roller bearings. Based on the rolling friction of the tapered roller bearing, the heat generated by friction force in the operation process is reduced. The tapered shape enables the roller to transfer load evenly during rolling, thereby greatly reducing wear and, in turn, improving durability. It should be noted that the tapered roller bearing is usually used in a double-use, reverse installation. Specifically, as shown in the embodiment of fig. 1, the first bearing 150 is a tapered roller bearing, and the first bearing 150 includes two first bearings 150, and the two first bearings 150 are respectively sleeved outside the support member 140 and are installed in opposite directions.

As shown in fig. 1, in some embodiments, the rim 110 is rotatably disposed about the first axis of rotation outside of the support 140. Wherein the first axis of rotation coincides with the axis of the output shaft 132. Thus, the first rotation axis coincides with the axis of the output shaft 132, which can ensure the rim 110 to have better connection reliability and rotation stability. Of course, in other embodiments, only the first rotation axis may be misaligned with the axis of the output shaft 132, and is not limited herein.

Continuing to refer to FIG. 1, in some embodiments, the reducer 130 has an end cap 133 that is coupled to the rim 110. The end cover 133 and the output shaft 132 define a first accommodating space a therebetween, and the support 140 is at least partially located in the first accommodating space a. Thus, the support member 140 can reliably support the rim 110 and the entire vehicle, and the space between the end cover 133 of the reducer 130 and the output shaft 132 can be reasonably utilized, so that the structure is more compact. Further, the output shaft 132 includes a torque portion 1321 and a fixing portion 1322, the torque portion 1321 and the end cover 133 define a first accommodating space a therebetween, and the fixing portion 1322 is connected to the end cover 133. The torque portion 1321 is disposed at an angle to the fixing portion 1322. Thus, the output shaft 132 and the end cap 133 can be stably fixed, so that the torque is stably transmitted to the end cap 133 through the torque portion 1321 and the fixing portion 1322 of the output shaft 132, and then transmitted to the rim 110, thereby improving the transmission efficiency of the torque. Further, the torque portion 1321 and the fixing portion 1322 are disposed at a right angle, and have a substantially "T" shape in cross section. Specifically, the fixing portion 1322 and the end cover 133 are connected by means of bolts.

As shown in conjunction with fig. 1 and 2, in some embodiments, the reducer 130 further includes a planet carrier 134, a sun gear 135, planet gears 136, and a ring gear 138. The sun gear 135 is connected to the input shaft 131, and the planet carrier 134 is connected between the planet gears 136 and the output shaft 132. The ring gear 138 is connected to a support 140 and the planet gears 136 mesh with the sun gear 135 and the ring gear 138, respectively. . In this way, the torque output from the drive shaft 121 of the motor 120 can be transmitted to the rim 110 after being decelerated by the sun gear 135, the planetary gear 136, and the ring gear 138 that are engaged with each other. The ring gear 138 can provide support for the planet gears 136, so that the planet gears 136 can be easily decelerated through rotation, and the ring gear 138 can provide support force for the support 140, so that the support 140 can be fixed more stably. Further, the ring gear 138 is keyed with the support 140. The key connection is a circumferential fixation between the ring gear 138 and the support 140 by means of keys to transmit motion and torque. The key connection can be divided into flat key connection, semi-circular key connection, wedge key connection and tangential key connection. It will be appreciated that the reducer 130 is a planetary reducer having the characteristics of light weight, small size, wide range of gear ratios, high efficiency, smooth operation, low noise, and high adaptability. Optionally, the sun gear 135 is a helical gear. The helical gear has the characteristics of stable transmission, small impact, vibration and noise and the like, and is widely used in high-speed and heavy-load occasions. The common straight gear is engaged along the tooth width, thereby generating the problems of impact vibration noise, unstable transmission and the like. The helical gear transmission is superior to straight teeth, and the center distance can be reduced, so that the bearing capacity of the transmission is improved, and the helical gear transmission is suitable for a high-speed heavy-load state.

As shown in fig. 1 and 3, in some embodiments, the reducer 130 further includes a second bearing 137, and the planet carrier 134 includes a first carrier 1341 and a second carrier 1342 connected to each other. The second bearing 137 is sleeved outside the input shaft 131. Wherein, the first frame 1341 is connected to the output shaft 132. The sun gear 135 and the input shaft 131 are configured to be rotatable relative to the second frame 1342 of the carrier 134 by means of a second bearing 137. In this way, the second bearing 137 can restrict the movement of the sun gear 135 and the input shaft 131 connected to the sun gear 135 in the axial direction and the radial direction thereof, and can reduce the friction coefficient between the sun gear 135 and the carrier 134, thereby facilitating the sun gear 135 to rotate more smoothly relative to the carrier 134 and ensuring the revolution accuracy of the sun gear 135. Optionally, the second bearing 137 is a tapered roller bearing. In the embodiment shown in fig. 3, the second bearing 137 is a tapered roller bearing, and the second bearing 137 includes two bearings, and the two bearings 137 are respectively located at two sides of the sun gear 135 and are installed in opposite directions to each other. In the embodiment of the present application, the first frame 1341 and the second frame 1342 are an integral structure. Of course, in other embodiments, the structure may be a split structure, and is not limited herein.

Fig. 3 shows a partial structural view of the wheel structure 100 in an embodiment of the present application.

As shown in fig. 1 and 3, in some embodiments, the support 140 includes a bending moment portion 142 and a connection portion 141 connected to the bending moment portion 142, and the bending moment portion 142 is located in the first accommodating space a. In this way, the bending moment portion 142 can receive the weight from the rim 110, and the connecting portion 141 can support and protect other components. Specifically, the connection portion 141 includes a first stepped portion 1411 connected to the connection portion 141. A second accommodating space b is defined between the first step portion 1411 and the output shaft 132 of the reducer 130, and the planet carrier 134, the sun gear 135 and the planet gear 136 are located in the second accommodating space b. In this way, the first step portion 1411 can provide an installation space for the carrier 134, the sun gear 135, and the planet gears 136, and the carrier 134, the sun gear 135, and the planet gears 136 can be protected from being damaged by the impact of an external component.

Referring to fig. 1 and 3, further, the reducer 130 further includes a third bearing 139, and the third bearing 139 is disposed between the carrier 134 and the first step portion 1411. In this way, the support 140 can be provided with a supporting force by the third bearing 139, so that the support 140 can be more stably fixed between the rim 110 and the carrier 134. Furthermore, the third bearing 139 can make the rotation of the planet carrier 134 relative to the support 140 smoother. Optionally, the third bearing 139 is a deep groove ball bearing. Therefore, the deep groove ball bearing can bear radial and axial loads at the same time, is convenient to seal and easy to maintain, and is widely applied due to the characteristics of simple structure and low cost. In the embodiment shown in fig. 1, the third bearings 139 are deep groove ball bearings, and the third bearings 139 include two third bearings 139, which are respectively located on two sides of the planet carrier 134.

With continued reference to fig. 3, in some embodiments, the supporting element 140 further includes a second step portion 1412, and the second step portion 1412 is connected between the first step portion 1411 and the motor 120. In this way, the second step portion 1412 is connected to the motor 120, so that the support 140 can be securely fixed, and the support 140 cannot reliably receive the weight of the rim 110 due to unstable fixation. In addition, the second stepped portion 1412 can be adapted to other components of the wheel structure 100, so that interference with other components when the supporting member 140 is fixed to the motor 120 is avoided.

As shown in fig. 1 and 3, in some embodiments, the motor 120 includes a housing 122, and the second step portion 1412 is connected between the first step portion 1411 and the housing 122 of the motor 120. Further, the motor 120 further includes a stator 123 and a rotor 124. The stator 123 and the rotor 124 are necessary components of the motor 120, the stator 123 is fixedly installed on the housing 122, and the stator 123 is usually wound with coils. The rotor 124 is fixed on the base of the motor 120 through a bearing or a shaft sleeve, the rotor 124 is provided with a silicon steel sheet and a coil, a magnetic field is generated on the silicon steel sheets of the stator 123 and the rotor 124 by current under the action of the coil, and the rotor 124 is driven to rotate through the magnetic field.

In some embodiments, the sun gear 135 and the input shaft 131 may be an integral structure or a split structure. In the embodiment of the present application, the sun gear 135 and the input shaft 131 are of an integral structure. The sun gear 135 and the input shaft 131 of the integrated structure can avoid more transmission parts to generate transmission loss while improving the structural strength, so that the transmission efficiency is improved. Of course, in other embodiments, the sun gear 135 and the input shaft 131 may be a split structure, for example, the sun gear 135 is sleeved on the input shaft 131. The sun gear 135 may also be connected to the input shaft 131 via other transmission components, without limitation.

With continued reference to fig. 1 and 3, in some embodiments, the wheel structure 100 further includes a retaining member 160. The two axial ends of the second bearing 137 respectively abut against the locking member 160 and the sun gear 135, so that the second bearing 137 is locked and fixed between the locking member 160 and the sun gear 135. In this way, the second bearing 137 can be preloaded by the locking member 160, and the sun gear 135 can be provided with a supporting force. Specifically in some embodiments, the wheel structure 100 further includes an adjustment member 180. The adjuster 180 is sandwiched between the locker 160 and the second bearing 137. So, adjusting part 180 can adjust the clearance between retaining member 160 and second bearing 137, avoids having the error between retaining member 160 and the second bearing 137, prevents to take place to become flexible between retaining member 160 and the second bearing 137. In addition, the surface of the second bearing 137 can be protected from being scratched by the locking member 160 through the adjustment member 180, the pressure of the locking member 160 on the second bearing 137 is dispersed, and the locking effectiveness of the locking member 160 is ensured. Optionally, the adjuster 180 is a washer. In particular to the embodiment of the present application, the locker 160 is threadedly coupled to the second body 1342 of the carrier 134. Thus, the threaded connection can ensure reliable fixation between the locking member 160 and the planet carrier 134, and can be matched with the adjusting member 180 in a threaded connection manner, and the second bearing 137 can be stably locked by screwing the locking member 160 into the planet carrier 134 and combining the thickness of the adjusting member 180.

Referring to fig. 1 and 2, in some embodiments, the wheel structure 100 further includes a brake 170. The brake 170 is configured to brake the motor 120. In this way, braking of the wheel can be achieved by braking the motor 120 with the brake member 170. In particular, in some embodiments, brake 170 is configured to brake drive shaft 121. In this manner, the braking torque required for the wheel structure 100 can be made relatively small by braking the high-speed end by the braking member 170, so that the size of the braking member 170 required therefor can be made small, thereby reducing the development cost of the braking member 170.

Based on the same concept of the present application, the present application also provides a vehicle including the wheel structure 100 described above. By using the wheel structure 100, the support 140 can bear bending moment, and the service life of the output shaft 132 in the wheel structure 100 is prolonged, so that the service life of the vehicle is prolonged. Moreover, in the vehicle using the wheel structure 100 described above, since the development cost of the brake member 170 in the wheel structure 100 is reduced, the development cost of the entire vehicle is also reduced.

In the wheel structure 100 and the vehicle provided in the embodiment of the present application, the wheel structure 100 includes the rim 110, the motor 120, the speed reducer 130, the support 140, the first bearing 150, the locking member 160, the braking member 170, and the adjusting member 180, the wheel structure 100 can transmit torque to the output shaft 132 of the speed reducer 130 through the driving shaft 121 of the motor 120, and bear bending moment through the support 140 between the rim 110 and the output shaft 132 of the speed reducer 130, so that the output shaft 132 of the speed reducer 130 is prevented from bearing bending moment while transmitting torque, bending moment decoupling is achieved, and thus the service life of the output shaft 132 is prolonged. The bending moment part 142 of the support 140 is located in the first accommodating space a, and can bear bending moment more stably, and the connecting part 141 formed by the first step 1411 and the second step 1412 can provide an installation space for the components in the wheel structure 100 while ensuring stable connection. Moreover, a gap is formed between the support member 140 and the output shaft 132, so that the easiness of torque transmission of the output shaft 132 can be improved, and the friction between the support member 140 and the support member can be avoided. The first bearing 150, the second bearing 137 and the third bearing 139 in the wheel structure 100 can be supported between the components, and the relative rotation between the components can be easily improved, so that the wheel structure 100 can run more smoothly. The carrier 134, the sun gear 135, and the planet gears 136 in the reduction gear 130 can increase the torque while reducing the speed by the meshing relationship between the gears. In addition, the brake member 170 is provided on the driving shaft 121 of the motor 120, and braking at a high speed end is enabled, reducing braking torque, thereby reducing the size of the brake member 170 and further reducing the development cost of the brake member 170.

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-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present application. 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 (10)

1. A wheel structure, comprising:

a rim;

a motor having a drive shaft;

a reducer having an input shaft and an output shaft; the input shaft is connected with the driving shaft, and the output shaft is connected with the wheel rim;

the support member is sleeved outside the output shaft, and the wheel rim is rotatably arranged outside the support member so that the support member can bear bending moment from the wheel rim;

wherein a gap is provided between the support and the output shaft.

2. The wheel structure according to claim 1, characterized in that the wheel structure further comprises a first bearing;

the first bearing is sleeved outside the support, and the rim is rotatably connected with the support by means of the first bearing.

3. The wheel construction of claim 1 wherein the rim is rotatably disposed about a first axis of rotation outside of the support;

wherein the first axis of rotation coincides with the axis of the output shaft.

4. The wheel structure according to claim 1, wherein the reducer has an end cap connected to the rim, the end cap defining a first housing space with the output shaft;

the supporting piece is at least partially positioned in the first accommodating space.

5. A wheel construction according to any of claims 1-4, characterised in that the reducer further comprises a planet carrier, a sun wheel, a planet wheel and a ring gear;

the sun gear is connected with the input shaft, and the planet carrier is connected between the planet gear and the output shaft;

the gear ring is connected with the support piece, and the planet wheel is meshed with the sun wheel and the gear ring respectively.

6. The wheel structure according to claim 5, characterized in that said reducer further comprises a second bearing, said planet carrier comprising a first carrier body and a second carrier body connected to each other;

the second bearing is sleeved outside the input shaft;

the first frame body is connected with the output shaft; the sun gear and the input shaft are configured to be rotatable relative to the second carrier of the planet carrier by means of the second bearing.

7. The wheel construction of claim 6 further comprising a locking member;

the axial two ends of the second bearing are respectively abutted to the locking piece and the sun wheel, so that the second bearing is locked and fixed between the locking piece and the sun wheel.

8. A wheel construction according to claim 7, characterised in that the locking member is threadedly connected to the second carrier body of the planet carrier.

9. A wheel construction according to any one of claims 1-4, characterized in that the wheel construction further comprises a brake member;

the brake member is configured to be capable of braking the motor.

10. A vehicle characterized by comprising a wheel structure according to any one of claims 1-9.

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