阅读说明：本技术 一种利用轮胎形变散热与减震的轮毂电机结构 (Wheel hub motor structure capable of dissipating heat and absorbing shock by utilizing tire deformation ) 是由 谢金法 时佳威 赵勇 高兆鑫 杨文豪 于 2020-07-15 设计创作，主要内容包括：本发明提供了一种利用轮胎形变散热与减震的轮毂电机结构,包括一个或多个环绕轮毂电机周向分布的油液喷射装置,油液喷射装置包括固定在轮胎外圈内壁上且能够沿轮胎径向弹性变形的压缩弹性件和固定在该弹性件末端并穿过轮胎内壁进入绕轮毂电机周向分布的导油腔内、在轮胎受力变形时在弹性件的带动下沿轮胎径向滑动以推动导油腔内的油液使其油液出口喷洒至轮毂电机内的顶柱；所述顶柱与轮胎之间还设有用于实现轮胎气密性的密封件；所述导油腔上还设有用于供轮毂电机内油液回流至导油腔的油液入口；所述油液出口和油液入口均设有单向阀。本发明利用顶柱对油液的喷射对电机转子直接进行散热、具有一定的减震效果,且采用机械喷射,故障率较低。(The invention provides a hub motor structure capable of dissipating heat and absorbing shock by utilizing tire deformation, which comprises one or more oil injection devices distributed circumferentially around a hub motor, wherein each oil injection device comprises a compression elastic piece which is fixed on the inner wall of an outer ring of a tire and can elastically deform along the radial direction of the tire, and a top column which is fixed at the tail end of the elastic piece, penetrates through the inner wall of the tire, enters an oil guide cavity distributed circumferentially around the hub motor, and slides along the radial direction of the tire under the driving of the elastic piece when the tire deforms under stress so as to push oil in the oil guide cavity to spray an oil outlet of the oil guide cavity to the inside of the hub motor; a sealing element for realizing the air tightness of the tire is arranged between the top column and the tire; the oil guide cavity is also provided with an oil inlet for oil in the hub motor to flow back to the oil guide cavity; the oil liquid outlet and the oil liquid inlet are both provided with one-way valves. The invention utilizes the ejection of the ejection column to spray oil to directly radiate the motor rotor, has certain damping effect, and adopts mechanical ejection, thereby having lower failure rate.)

1. The utility model provides an utilize heat dissipation of tire deformation and absorbing in-wheel motor structure which characterized in that: the oil injection device comprises a compression elastic piece which is fixed on the inner wall of the outer ring of the tire and can elastically deform along the radial direction of the tire, and an ejection column which is fixed at the tail end of the elastic piece, penetrates through the inner wall of the tire, enters an oil guide cavity distributed along the circumferential direction of the hub motor, and slides along the radial direction of the tire under the driving of the elastic piece when the tire deforms under stress so as to push the oil in the oil guide cavity to spray an oil outlet of the oil to the inside of the hub motor; a sealing element for realizing the air tightness of the tire is arranged between the top column and the tire; the oil guide cavity is also provided with an oil inlet for oil in the hub motor to flow back to the oil guide cavity; the oil liquid outlet and the oil liquid inlet are both provided with one-way valves.

2. The structure of the in-wheel motor utilizing the deformation of the tire to dissipate heat and absorb shock as claimed in claim 1, wherein: the tail end of each top column is provided with one or a plurality of parallel pistons used for pushing oil to be sprayed out from the oil outlets corresponding to the front ends of the pistons.

3. The structure of the in-wheel motor utilizing the deformation of the tire to dissipate heat and absorb shock as claimed in claim 1, wherein: the sealing element for realizing the air tightness of the tire is a sealing sleeve which is sleeved at one end of the outer side of the top column and is tightly and fixedly connected with the inner wall of the inner ring of the tire, and the other end of the sealing element is fixedly connected with the periphery of the compression elastic element or the inner wall of the outer ring of the tire so as to provide an independent closed sliding space for the top column.

4. The structure of the in-wheel motor utilizing the deformation of the tire to dissipate heat and absorb shock as claimed in claim 3, wherein: the joint of the top column and the inner ring of the tire is sealed by a sealing gasket.

5. The structure of the in-wheel motor utilizing the deformation of the tire to dissipate heat and absorb shock as claimed in claim 1, wherein: the elastic element is assembled in a fixed column, one end of the fixed column is fixedly connected with the inner wall of the tire through a sucking disc, and a top column connected with the elastic element is assembled in the other end of the fixed column in a sliding mode.

6. The structure of the in-wheel motor utilizing the deformation of the tire to dissipate heat and absorb shock as claimed in claim 5, wherein: the sealing element for realizing the air tightness of the tire is a sealing sleeve which is sleeved at one end of the outer side of the top column and is tightly and fixedly connected with the inner wall of the inner ring of the tire, and the other end of the sealing element is tightly matched with the periphery of the fixing column.

7. The structure of the in-wheel motor utilizing the deformation of the tire to dissipate heat and absorb shock as claimed in claim 1, wherein: the junction of the top column and the oil guide cavity is sealed through a sealing gasket to prevent oil liquid in the oil guide cavity from leaking.

8. The structure of the in-wheel motor utilizing the deformation of the tire to dissipate heat and absorb shock as claimed in claim 1, wherein: an oil cavity used for storing oil leaked from the joint of the top column and the oil guide cavity is further arranged between the oil guide cavity and the wheel hub, the top column penetrates out of the tire and then penetrates through the oil cavity and then enters the oil guide cavity, and sealing elements are arranged at the joints of the top column, the oil cavity and the oil guide cavity.

9. The structure of the in-wheel motor utilizing the deformation of the tire to dissipate heat and absorb shock as claimed in claim 1, wherein: the oil outlet is positioned right in front of the part used for pushing oil at the tail end of the top column.

Technical Field

The invention belongs to the technical field of wheel hub motor cooling, and particularly relates to a wheel hub motor structure for dissipating heat and absorbing shock by utilizing tire deformation.

Background

The hub motor driving system is characterized in that the hub motor is arranged in the electric automobile wheel to drive the wheel to rotate coaxially, complex devices such as a mechanical clutch, a gearbox, a speed reducer, a transmission shaft and the like are omitted, the structure of an automobile is simplified, and the power transmission efficiency of the driving system is improved. In order to meet the actual requirements of electric automobile operation, the hub motor needs to meet the requirements of high power density, high torque density, compact structure and the like. For the structure of the hub motor with the inner stator and the outer rotor, the heat generated by the loss in the stator is difficult to be transferred to the shell and dissipated, so that the internal temperature rise of the hub motor is increased. The performance of the motor is affected by excessive temperature rise, the motor is overheated, operation faults are easy to cause, and the service life of the motor is affected, so that the reasonable motor cooling mode is very important for the hub motor driving system. And the hub motor greatly increases the spring load mass and influences the comfort of passengers due to transplanting a large number of parts to the hub.

When the wheel hub motor produces a large amount of heats suddenly with heavy load operation, this moment because the coolant temperature is higher, take away the inside heat of motor and reduce, the pressure of this moment can greatly increased radiator, so that the coolant can not reduce the temperature that enough enters into the motor completely, if the coolant temperature does not reach the degree of taking away the wheel hub motor heat, the overheated coolant gets into inside not only can not reduce the temperature of wheel hub motor but can lead to wheel hub motor's temperature to improve this moment, can make wheel hub motor inside coil insulating nature suffer destruction, consequences such as irreversible demagnetization of permanent magnet, this will greatly reduced wheel hub motor's life, influence the security of car.

Disclosure of Invention

In order to solve the defects of poor heat dissipation mode and comfort of passengers in the prior art, ensure that the hub motor reasonably utilizes heat dissipation requirements under various operating conditions and reduce the resistance of oil to a rotor inside the motor, the invention provides a hub motor structure which utilizes tire deformation to dissipate heat and absorb shock, can utilize hub deformation to realize oil injection, reasonably meets the heat dissipation requirements of motor work, avoids motor damage or service life shortening caused by overheating of the motor inside the motor, and increases the comfort of the passengers.

The purpose of the invention and the technical problem to be solved are realized by adopting the following technical scheme. The invention provides a hub motor structure utilizing tire deformation for heat dissipation and shock absorption, which comprises one or more oil injection devices distributed circumferentially around a hub motor, wherein each oil injection device comprises a compression elastic piece which is fixed on the inner wall of an outer ring of a tire and can elastically deform along the radial direction of the tire, and a top column which is fixed at the tail end of the elastic piece, penetrates through the inner wall of the tire, enters an oil guide cavity distributed circumferentially around the hub motor, and slides along the radial direction of the tire under the driving of the elastic piece when the tire deforms under stress so as to push oil in the oil guide cavity to spray an oil outlet of the oil guide cavity to the hub motor; a sealing element for realizing the air tightness of the tire is arranged between the top column and the tire; the oil guide cavity is also provided with an oil inlet for oil in the hub motor to flow back to the oil guide cavity; the oil liquid outlet and the oil liquid inlet are both provided with one-way valves.

The object of the present invention and the technical problems solved thereby can be further achieved by the following technical measures.

In the hub motor structure utilizing the deformation heat dissipation and shock absorption of the tire, one or a plurality of parallel pistons for pushing oil to be sprayed out from the oil outlet corresponding to the front end of the piston are arranged at the tail end of each ejection column.

In the hub motor structure using deformation of the tire for heat dissipation and shock absorption, the sealing element for achieving air tightness of the tire is a sealing sleeve, wherein one end of the sealing sleeve, which is sleeved outside the top column, is tightly and fixedly connected with the inner wall of the inner ring of the tire, and the other end of the sealing sleeve is fixedly connected with the periphery of the compression elastic element or the inner wall of the outer ring of the tire, so that an independent closed sliding space is provided for the top.

In the hub motor structure utilizing deformation heat dissipation and shock absorption of the tire, the joint of the top column and the inner ring of the tire is sealed through the sealing gasket.

According to the hub motor structure capable of dissipating heat and absorbing shock through tire deformation, the elastic element is assembled in the fixing column, one end of the fixing column is fixedly connected with the inner wall of the tire through the sucking disc, and the ejection column connected with the elastic element is assembled in the other end of the fixing column in a sliding mode.

In the hub motor structure utilizing the deformation of the tire for heat dissipation and shock absorption, the sealing element for realizing the air tightness of the tire is a sealing sleeve, wherein one end of the sealing sleeve, which is sleeved outside the top column, is tightly and fixedly connected with the inner wall of the inner ring of the tire, and the other end of the sealing sleeve is tightly matched with the periphery of the fixing column.

In the hub motor structure utilizing deformation of the tire to dissipate heat and absorb shock, the joint of the top column and the oil guide cavity is sealed through the sealing gasket to prevent oil leakage in the oil guide cavity.

According to the hub motor structure utilizing the deformation of the tire for heat dissipation and shock absorption, the oil cavity used for storing oil leaked from the joint of the top post and the oil guide cavity is further arranged between the oil guide cavity and the hub, the top post penetrates out of the tire and then penetrates through the oil cavity to enter the oil guide cavity, and the joints of the top post, the oil cavity and the oil guide cavity are respectively provided with the sealing element.

In the hub motor structure utilizing the deformation of the tire for heat dissipation and shock absorption, the oil outlet is positioned right in front of the part used for pushing oil at the tail end of the top column.

Compared with the prior art, the invention has obvious advantages and beneficial effects. By means of the technical scheme, the invention can achieve considerable technical progress and practicability, has wide industrial utilization value and at least has the following advantages:

according to the hub motor structure utilizing the deformation of the tire for heat dissipation and shock absorption, provided by the invention, the deformation of the tire is used as the spraying power of the cooling liquid, the cooling liquid is directly sprayed onto the rotor of the hub motor, the rotor can be directly radiated, and the heat dissipation effect is improved; the damping device has a certain damping effect, and the service life of the motor is prolonged; the failure rate is low due to mechanical injection; corresponding oil pumps are not needed to be installed, so that the spring load mass is reduced and the cost of the whole vehicle is saved.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the structure of the fuel injection device of the present invention

Fig. 3 is a schematic illustration of the location of the various components of the present invention.

[ description of main element symbols ]

1. Oil chamber

2. Second gasket

3. First gasket

4. Fixing column

5. Spring

6. Suction cup

7. Top pillar

8. Sealing sleeve

9. Tyre for vehicle wheels

10. Oil guide cavity

11. First check valve

12. Rotor

13. Second check valve

14. Hub motor

Detailed Description

To further illustrate the technical means and effects of the present invention adopted to achieve the predetermined objects, the following detailed description will be given to a hub motor structure using deformation of a tire to dissipate heat and damp, its specific implementation, structure, features and effects thereof according to the present invention with reference to the accompanying drawings and preferred embodiments.

Please refer to fig. 1-3, which are schematic structural views of various parts of a hub motor structure using tire deformation for heat dissipation and shock absorption according to the present invention, the hub motor structure includes a plurality of oil injection devices having one end fixed on an inner wall of an outer ring (a portion contacting with the ground) of a tire 9 and the other end extending into an oil guide cavity 10 in a hub from the inner ring (a portion contacting with the hub) of the tire 9, the oil injection devices include a compression elastic member fixed on an inner portion of the outer ring of the tire and having a capability of deforming along a radial direction of the tire, a top post 7 sequentially passing through the inner wall of the tire and the hub into the oil guide cavity 10 distributed circumferentially around the hub motor and sliding back and forth along the radial direction of the tire under the driving of the elastic member is fixed at the end of the elastic member, when the tire contacts with a road surface and deforms, the elastic member fixed on the inner wall of the deformation portion is compressed radially, and the tail end of the top column is provided with a piston for pushing cooling liquid in the oil guide cavity to be sprayed out from an oil outlet on the surface of the oil guide cavity close to the hub motor to realize cooling of the hub motor. And a sealing piece for preventing the tire from being leaked when the top column 7 slides back and forth is arranged between the top column 7 and the inner ring wall body of the tire 9.

In the embodiment of the invention, the sealing element for preventing the inner ring of the tire 9 from being leaked due to the reciprocating sliding of the top column 7 comprises a sealing sleeve 8, wherein one end of the sealing sleeve is tightly and fixedly connected with the inner wall of the inner ring of the tire, and the other end of the sealing sleeve is fixedly connected with a compression elastic element or the inner wall of the outer ring of the tire, so that an independent closed sliding space is provided for the top column 7 to prevent the tire.

Preferably, the elastic element is assembled in the fixed column 4, one end of the fixed column 4 is fixedly connected with the inner wall of the tire through the sucking disc 6, the top column 7 connected with the elastic element is assembled in the other end of the fixed column in a sliding manner, the sealing sleeve is tightly assembled on the periphery of the fixed column 4, and when the top column 7 slides in a reciprocating manner, the arrangement of the sealing sleeve enables air in the tire not to leak out, so that the air leakage condition of the tire is avoided. Preferably, the elastic member is a spring.

In the embodiment of the invention, in order to enhance the protection of air tightness between the top pillar and the tire, a first sealing gasket 3 for realizing sealing between the top pillar and the tire inner ring is further arranged at the joint of the top pillar and the tire inner ring.

In the embodiment of the invention, the oil outlet is provided with a first one-way valve 11 for preventing sprayed cooling liquid from returning to the oil guide cavity.

And one or more oil inlets for the oil liquid cooled by the hub motor to reenter the oil guide cavity are also arranged on the surface of the oil guide cavity close to the hub motor, and the oil inlets are provided with second one-way valves 13 for the oil liquid in the hub motor to enter the oil guide cavity and preventing the oil liquid in the oil guide cavity from flowing out of the oil inlets.

In the embodiment of the invention, the joint of the top column and the oil guide cavity is sealed by the second sealing gasket 2, so that the oil in the oil guide cavity is prevented from overflowing outwards.

In the embodiment of the invention, an oil cavity 1 for storing oil leaked from the joint of the top column and the oil guide cavity 10 is also arranged between the oil guide cavity 10 and the wheel hub, and the top column 7 extends out of the tire, sequentially penetrates through the wheel hub and the oil cavity and finally enters the oil guide cavity. And sealing elements are arranged at the joints of the top column, the oil cavity and the oil guide cavity.

Preferably, the end of each top pillar 7 is provided with one or a plurality of parallel pistons for pushing the oil to be sprayed out from the corresponding oil outlet at the front end of the top pillar, and each oil outlet is provided with a first check valve 11 for preventing the oil from entering.

The first one-way valves and the second one-way valves are distributed around the hub motor, so that the motor is kept to spray oil, and small resistance is generated on a motor rotor.

According to the hub motor heat dissipation structure, the oil cavity, the second sealing gasket, the fixing column, the spring, the sucker, the top column, the oil guide cavity, the first one-way valve, the second one-way valve and the hub motor form the hub motor heat dissipation structure, oil injection and heat dissipation can be performed on the hub motor by utilizing the deformation of the hub, an oil pump is not needed, and therefore the cost of the whole vehicle is saved and the spring load mass is reduced. When in-wheel motor electric automobile starts, the tire contacts the road surface and takes place deformation, thereby lead to the spring to compress, the inside spring of fixed column and fore-set atress promote to lead the inside fluid of oil cavity to spout from first check valve, make fluid to the inside rotor of in-wheel motor, the stator, parts such as winding cool off, when fluid is inside the motor, fluid receives the influence of gravity in the motor bottom, be provided with the second check valve together with the motor is inside and lead the oil pocket on the inside wall of motor this moment, make fluid enter into again through the second check valve and lead the oil pocket, in-wheel motor inside cooling system gets into work again.

Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.