TWI680628B - Adapted structure of in-wheel motor - Google Patents

Abstract

The main technical feature of the adaptable structure of the in-wheel motor provided by the present invention is that the bearing surfaces facing each other in the direction of gravity are formed on the rim and the motor base of the rotating motor, respectively, so as to make the weight of the rotating motor itself It can be supported by the rim through the abutting surface of each other to ensure the stability of the connection between the rotating electric machine and the rim, and reduce the force required to withstand the joint structure between the motor seat and the rim, which can be avoided as known Technically, the lack of excessive concentration of stress derived from the technology of combining bolts to simultaneously bear the weight of rotating electrical machines and providing lock-up fixation is required.

Description

Adapted structure of in-wheel motor

The invention relates to an in-wheel motor, and more particularly to an adapting structure of an in-wheel motor.

The rotor motor technology of the outer rotating rotary motor is combined with the wheel hub motor technology. The structure of the rotor is mainly to accommodate the motor in the inner space of the rim of the vehicle, and to fix the outer rotor member and the rim of the motor to each other. The motor is used to provide power to drive the wheels to rotate, or to generate electricity in the opposite direction.

As shown in the first figure, in the conventional hub motor technology, the structure that combines the rotating electric machine and the rim is such that most of the coupling bolts (1) are fixed to the motor housing (2) of the rotating electric machine at one end, respectively. After passing through the corresponding perforations (4) preset on the wheel rim (3), the screw sleeve (5) is used to fix the screw lock, so as to fix the rotating motor in the wheel rim (3), and make these combinations The other end of the bolt (1) is provided as a supporting and fixing element such as a disc (not shown in the figure) of the hydraulic braking unit, so that the three rotating motors, the rim and the braking unit are simultaneously supported by the combination bolts (1). Combining and fixing is an iso-combination technology. Although it is more convenient to assemble, because the braking force generated by the braking unit when the vehicle is braking can reach thousands of Newtons. These combined bolts (1) directly act on the rotating electric machine, which causes excessive external force to the rotating electric machine, which may damage the normal operating performance of the rotating electric machine, which is not an ideal technology.

Therefore, the main object of the present invention is to provide an adaptable structure for a hub motor, which can improve the stability of the coupling between the motor and the rim.

The reason is that, in order to achieve the above-mentioned object, the main technical feature of the adaptable structure of the in-wheel motor provided by the present invention is that the bearing surfaces of the rim and the motor base of the rotating electric machine respectively form abutting surfaces facing each other in the direction of gravity. It is used to make the weight of the rotating electric machine be borne by the rim through the abutting surface of each other, to ensure the stability of the connection between the rotating electric machine and the rim, and to reduce the load required by the joint structure between the motor seat and the rim. It can avoid the lack of excessive concentration of stress caused by the technology that requires the bolts to bear the weight of the rotating electrical machine at the same time and provide the lock and fix as in the conventional technology.

Further, the adapted structure of the hub motor includes a rim, a motor base, a fitting unit, and a connection unit in the structure, and the rim system has a ring and a ring A side body at one axial end of the ring and a socket protruding from an outer side of the side body; the motor base is housed in the ring, and an inner seat surface faces the side body and faces away from the side body. The inner side of the outer side; the fitting unit has two embedded parts that are complementary in shape to each other and are fitted to each other, and are respectively arranged on the inner seat surface of the motor base and the inner side of the side body, and the two are on the ring. The radial shoulder surfaces that are in contact with each other in the radial direction are axial shoulder surfaces that are located on the first insert portion and the second insert portion, and are attached to each other in the axial direction of the ring. Is located on the first and second inlays respectively; the connection unit has a first connection, which is connected to the side body and the motor base through the axial shoulder surfaces, so that the The motor base is fixed in the rim and can rotate with the rim.

As a result, the radial shoulder surfaces that are butted against each other are butted against each other in a direction corresponding to gravity, thereby forming a bearing surface for the rim to bear the weight of the rotating electrical machine as described above.

Among them, in response to the continuous rotation of the hub motor, the radial shoulder surfaces are annular, so that the weight of the rotary motor can be passed from the wheel to the rim through the radial shoulder surfaces at any angle of rotation. Provide support.

Another object of the present invention is to provide an adaptable structure of a hub motor, which can avoid the huge braking force generated when the conventional braking unit is operated from directly feeding back to the rotary motor, thereby preventing the rotary motor from being unexpectedly damaged.

In order to achieve the object, the adaptable structure of the in-wheel motor provided by the present invention further makes the connection unit have a second connection portion for connecting the seat to the external disc-like braking element. The first connection part and the second connection part are separated from each other, so that the braking force generated when the braking unit is operated is transmitted to the rim through the second connection part, instead of the conventional technology Directly transmitted to the rotating electric machine, thereby reducing the adverse factors that affect the normal operation of the rotating electric machine.

Yet another object of the present invention is to provide an adaptable structure of a hub motor, which can increase the heat dissipation capability of the hub motor and make the rotating motor have better performance.

The achievement of this purpose is based on the technical characteristics of increasing the heat dissipation efficiency from the thermal energy to the atmosphere. In terms of the structure of the article, the adaptive structure of the wheel motor further includes a first spoiler, which is provided suddenly. On the inner surface of the motor base, according to this, when the rotating electric machine rotates, the first spoiler rotates with the motor base, thereby disturbing the air existing in the motor base, and during the disturbance, it continues The disturbed air can increase the degree of contact with the rotary motor's heat source and the first spoiler at the same time, so that the heat energy can be transferred from the heat source to the motor base through the air and the first spoiler more quickly. Dissipated into the outside atmospheric air through the motor base.

Further heat dissipation effect can be provided by improving the heat transfer efficiency between the motor base and atmospheric air. To this end, the adaptable structure of the hub motor can further include an outer cover, which is fixed on the outside of the motor base. While in direct contact with the atmosphere, a second spoiler is provided on the outer cover for forcing the atmosphere on the outside of the motor base by the second spoiler when the motor base rotates with the rim. Convection is formed on the surface to increase the heat dissipation efficiency of the motor base.

First, please refer to the second and third figures. The adapting structure (10) of a wheel motor provided in a preferred embodiment of the present invention mainly includes a wheel (20) and a motor. The base (30) includes a fitting unit (40), a connection unit (50), an outer cover (60), and a spoiler unit (70).

Please also refer to the fourth and fifth figures. The rim (20) is a wheel component of a conventional vehicle. The structure includes a circular ring with a suitable width and strength for the installation of a tire. (21), a side body (22) integrally formed at one axial end of the ring (21) is used to form a member that can be extended and extended by the axle, and a seat (23) with a predetermined protruding shape is It is integrally formed on the outer end surface of the side body (22) and surrounds the axis of the ring (21). Most of the first holes (24) are respectively provided in the socket (23) and can extend through the socket. The side body (22), the axis of the hole is parallel to the axis of the ring (21), most of the second holes (25) and the first holes (24) are arranged in the side body (22) in a staggered manner. )on.

Please refer to the sixth and seventh figures again. The motor base (30) belongs to the technical content of the conventional wheel motor, and is accommodated in the ring (21), and can follow the wheel (20). While rotating, in structure, the motor base (30) has a ring-shaped shell (31), and an inner plate member (32) and an outer plate member (33) are respectively fixed to the shell ( 31) on both ends in the axial direction, so as to form an internal accommodation space (301) between the inner plate member (32), the outer plate member (33), and the case (31), for receiving a rotating electric machine The mover and the stator, but because the specific technical content of the motor is not the object of the present invention to improve, and it has nothing to do with the purpose and effect of the present invention, so it is omitted in the text and drawings. Do not repeat it.

Please refer to the second, fourth and fifth figures. The fitting unit (40) is located between the rim (20) and the motor base (30), so as to form the motor base (30). The bearing surface of the weight, specifically, the fitting unit (40) has two embedded parts (41) (42) which are complementary in shape to each other and can be engaged with each other, and are provided on the side body (22). ) Is opposite to the inner side (221) of the motor base (30), and is opposite to the inner seat surface (302) of the side body (22) opposite to the motor base (30). In the direction of gravity, that is, in the direction of gravity, the radial shoulder surfaces (43) that are in contact with each other are respectively arranged on the inserts (41) (42), and the two are in the axial direction of the ring (21). The axial shoulder surfaces (44) that are in contact with each other in the direction are respectively provided on the inserting portions (41) (42), so that when the motor base (30) is embedded in the rim (20), The embedded portions (41) (42) are fitted into each other, and at the same time, the radial shoulder surfaces (43) abutted on each other form an appropriate bearing surface to form an appropriate support for the motor base (30);

Furthermore, the inlays (41) (42) are mutually complementary in shape of a cylindrical protrusion and a circular depression, and the radial shoulder surfaces (43) are located on the protrusions, respectively. The peripheral side and the concave ring side, and the axial shoulder surfaces (44) are respectively located on the convex protruding end and the concave inner concave bottom.

The connection unit (50) has a first connection portion (51) composed of a plurality of screw-connected elements, and is respectively extended through the second holes (25) and passes through the insert portions (41). (42) The side body (22) and the motor base (30) are combined with the axial shoulder surfaces (44), so that the motor base (30) is fixed in the rim (20). The second connection portions (not shown in the figure) formed by the screw connection elements can be screwed into the first holes (24), respectively, to be combined with external braking elements, so that braking elements such as discs can be used. It is fixed on the socket (23).

Please refer to the seventh figure. The outer cover (60) can be fixed on the outer seat surface (303) opposite to the inner seat surface (302) on the motor seat (30). The motor base (30) rotates.

Please refer to the fourth figure. The spoiler unit (70) includes a first spoiler (71) and a second spoiler (72). The air in the accommodating space (301) and the outside atmosphere respectively force them to flow to increase the efficiency of heat dissipation, among which:

The first spoiler (71) has a plurality of protruding pieces (711) arranged in a radial arrangement on the inner plate surface of the inner plate member (32) and / or the outer plate member (32), and Located in the accommodating space (301), forcing the air in the accommodating space (301) to convect, and increasing the degree of contact with the air in the accommodating space (301);

The second spoiler (72) is provided on the outer cover (60), and when the outer cover (60) is rotated, the adjacent atmosphere is forced to flow in the direction of the motor base (30) to increase the motor. The amount of air contacted by the base (30) in a unit time, thereby improving the heat dissipation efficiency of the motor base (30). It should be explained here that the second spoiler (72) can be changed by changing the The shape of the outer cover (60) is formed, for example, the shape of the blades on both sides of the hollow cover (60) is changed, so that the air can be forced to flow toward the motor base (30) like a conventional electric fan, etc. The change in shape is made by those with ordinary knowledge in the technical field to which the present invention belongs, based on the disclosed knowledge and technology at the time of the application, so it will not be explained here.

With the composition of the above components, the adapted structure (10) of the in-wheel motor can achieve the following effects:

First, provide appropriate support for the motor base (30) through the radial shoulder surfaces (43), so that the first connecting portion (51) can avoid the need to bear the weight of the rotating motor as in the conventional technology. In addition to making the combination between the rotating electric machine and the rim more stable, the first connecting portion (51) can also be prevented from being subjected to excessive stress.

Second, the connection unit (50) separates the combination of the rim (20) and the motor base (30), and the combination of the rim (20) and the braking element, which can avoid the huge braking effect. The force is transmitted directly to the rotating electric machine via the connecting element to ensure that the rotating electric machine is not damaged as a result.

Third, the cylindrical convex and circular concave shapes of the inlays (41) and (42) are circularly processed and concentric, which is more aligned than the conventional technology shown in the first figure. Different holes and connecting rods make it easier to achieve true circles and concentricity.

Fourth, the spoiler unit (70) uses the first spoiler (71) to increase the flow of air and the area of the elements in contact with the air from the inside of the rotating electric machine, so that the heat energy inside the rotating electric machine can be quickly transferred to the On the motor base (30), the second turbulent portion (72) is added to increase the heat dissipation efficiency of the motor base (30) to transfer heat energy to the atmosphere. The two assist each other to improve the heat dissipation efficiency of the rotating electric machine. efficacy.

(1) ‧‧‧Bolt

(2) ‧‧‧Motor housing

(3) ‧‧‧wheel

(4) ‧‧‧perforation

(5) ‧‧‧Screw

(10) ‧‧‧ Adaptation structure of hub motor

(20) ‧‧‧Rim

(21) ‧‧‧Circle

(22) ‧‧‧ Lateral

(221) ‧‧‧inside

(23) ‧‧‧Seat

(24) ‧‧‧First Hole

(25) ‧‧‧Second Hole

(30) ‧‧‧Motor base

(301) ‧‧‧Accommodation space

(302) ‧‧‧Inner seat

(303) ‧‧‧Outer seat

(31) ‧‧‧shell

(32) ‧‧‧Inner plate

(33) ‧‧‧Outer plate

(40) ‧‧‧fitting unit

(41) (42) ‧‧‧Inlay

(50) ‧‧‧Connecting unit

(51) ‧‧‧First connection

(60) ‧‧‧ Cover

(70) ‧‧‧Spoiler

(71) ‧‧‧First Spoiler

(711) ‧‧‧ protruding piece

(72) ‧‧‧Second Spoiler

The first diagram is a schematic diagram of a conventional hub motor adapter structure. The second figure is a combined perspective view of a preferred embodiment of the present invention. The third figure is an exploded perspective view of a preferred embodiment of the present invention. The fourth diagram is a cross-sectional view of a preferred embodiment of the present invention, taken along the cutting plane line of FIG. 4-4. The fifth figure is an exploded view of a wheel rim and a motor base portion of a preferred embodiment of the present invention. The sixth figure is a perspective view of the structure of a motor base portion according to a preferred embodiment of the present invention. The seventh figure is an exploded view of a cover and a motor base portion of a preferred embodiment of the present invention.

Claims (13)

An adapting structure of an in-wheel motor includes: a rim, a ring, a side body located at one axial end of the ring, and a socket protruding from an outer side of the side body; a motor seat, Accommodated in the ring, with an inner seat surface facing the side body and facing away from the inside of the outer side; a fitting unit having a first insert that is complementary in shape to each other and fits into each other Part and a second insert part are respectively arranged on the inner seat surface of the motor base and the inner side of the side body, and two radial shoulder surfaces which are in contact with each other in the radial direction of the ring are respectively located at The first shoulder portion and the second shoulder portion, and two axial shoulder surfaces which are in contact with each other in the axial direction of the ring, are located on the first shoulder portion and the second shoulder portion, respectively; The connecting unit has a first connecting portion connected to the side body and the motor base through the axial shoulder surfaces, so that the motor base is fixed in the rim and can rotate with the rim. The adapting structure of the in-wheel motor according to claim 1, wherein the first inserting portion and the second inserting portion are recesses and protrusions which are complementary to each other, and are divided into the motor base and the side body. on. The fitting structure of the hub motor according to claim 2, wherein the outer circumference of the recess and the protrusion are respectively circular and coaxial with the axis of the ring. The adaptable structure of the hub motor according to claim 3, wherein the radial shoulder surfaces are respectively located on the circumferential side of the recess and the protrusion. According to the adapting structure of the in-wheel motor according to claim 3, wherein the axial shoulder surfaces are respectively located in the recessed and the protruding axial directions. According to the adaptable structure of the in-wheel motor according to claim 1, wherein the connection unit further includes a second connection portion, the first connection portion and the second connection portion each have a plurality of screwed connection elements. The adaptable structure of the hub motor according to claim 1, wherein the motor base has a ring-shaped shell, and an inner plate and an outer plate are respectively fixed on the axial ends of the shell. According to the adapting structure of the in-wheel motor described in claim 7, it further includes a first spoiler, which is arranged on the plate side of the outer plate facing the inner plate, and is used to follow the motor seat. When the rim rotates, it is necessary to cause the air inside the shell to be disturbed by the first spoiler. The fitting structure of the in-wheel motor according to claim 8, wherein the first spoiler is provided with a plurality of protruding pieces, and the first spoiler is spaced apart from each other on the outer plate. The adaptable structure of the in-wheel motor according to claim 9, wherein the protruding pieces are arranged radially with the curvature center of the shell as the center. The adapting structure of the in-wheel motor according to claim 1, wherein the connecting unit further includes a second connecting portion for connecting the bearing to an external braking element for fixing the external braking element to the external braking element. On the rim. According to the adapting structure of the in-wheel motor described in claim 1, the system further includes an outer cover, which is fixedly arranged on the outer seat surface opposite to the inner seat surface of the motor seat, and a second spoiler is provided. The outer cover is used to cause convection to the outside air through the second spoiler when the motor base rotates with the rim. The adaptable structure of the hub motor according to claim 12, wherein when the motor base rotates with the rim, the second turbulent part presses air toward the outer seat surface of the motor base to increase the Speed of air flow on the outer seat surface.