KR20030045882A - Modular Motorized Electric Wheel Hub Assembly Having a Braking System - Google Patents

Abstract

PURPOSE: A modularized motor wheel hub assembly embedded with a brake system is provided to assemble to a machine or a vehicle by only one unit without separate tools or equipment, to simplify a mechanical structure without separate accessories for braking, to reduce the rotational speed of a hub having large inertia energy with a little power in braking without locking, and to prevent the rotation even if power is applied to the machine or a vehicle wheel in a motor stopping. CONSTITUTION: A modularized motor wheel hub assembly(164) embedded with a brake system(41) is composed of a first shaft(12) protruded from a motor housing(35); a motor unit formed with a stator winding(33), a rotor(36), and a second shaft; a braking part comprising a spiral gear and a drive shaft disk formed at a third shaft, a gear disk(15) tooth-engaged with the spiral gear, a fourth shaft installed to be transmitted with power from the gear disk, an one-way clutch, and a ratchet; and a speed reducing part having a planetary gear. All shafts and disks are separated but on a same shaft. A hub(30), which covers the motor unit, the braking part, and the speed reducing part, is connected to the first shaft and a fifth shaft. The hub rotates slower than the second shaft when the motor rotates in a selected speed.

Description

Modular Motorized Electric Wheel Hub Assembly Having a Braking System}

The present invention relates to an electric wheel hub assembly for a wide range of wheel vehicles that are operated by mounting an automated device or wheels by developing the "hub assembly having a braking function", which is filed by the applicant, and more specifically, a transfer motor of an automatic warehouse and the like. It provides hub power of various electric vehicles such as deceleration device of bicycle automation equipment, bicycle, scooter, golf cart and off-road vehicle, passenger car, electric wheel chair, and can control only the inertia energy of the motor shaft when braking. A compact and modular electric wheel hub assembly that amplifies through a braking device in an interior and provides sufficient braking force to slow down or stop while driving.

Recently, due to the exhaust gas of vehicles that use gasoline or diesel as a main fuel, air pollution problem has been seriously raised, and the electric vehicle driving the power generating device with the high voltage and high current output from the lead acid battery or fuel cell, which is a secondary battery, Much effort is being made in development. Among the various types of electric vehicles being developed are various vehicles having electric motors which are directly connected to the wheel hubs and arranged to drive the hubs or are located completely within the hubs of the wheels.

The electric vehicle as described above is provided with a braking device employing a regenerative braking and a vacuum power booster for braking for deceleration or stop of the vehicle speed during operation. The brake system is composed of separate vacuum and hydraulic devices, control circuits, and mechanical elements for braking like a conventional engine driven vehicle, which is complicated in operation and has many components, which occupy a lot of space and cost a lot of energy. It is an obstacle to improving efficiency.

In addition, safety accidents have often occurred due to incomplete braking capability or impossibility of braking due to breakage of hydraulic system, failure of operating part, or stop of power source during high-speed driving or driving of slope. In addition, the parking brake was operated to increase the braking force in case of sudden braking or sudden breakdown, but the power transmitted to the cable was not constant, which caused the vehicle to rotate. When the vehicle is parked on the inclined surface, a collision accident or a safety accident occurs because the vehicle slips on the inclined surface due to inadvertent operation of the driver or inaccurate operation.

In the case of a towing vehicle such as a wheelchair or a wheelbarrow, it is very difficult to climb on an uphill road and easy to reverse driving, and it is difficult to adjust and stop the descending speed when driving downhill.

In order to solve the above problems, the present applicant has proposed a hub assembly having a braking function that is externally powered. Referring to Figure 1 describes the operation of the hub assembly having a braking function, the forward rotational force applied to the input shaft 13 protruding from the hub assembly rotates the input shaft 13 and the spiral gear 13a formed on the input shaft 13 ) Will also rotate in the forward direction. Since the gear disk 15 engaged with the spiral gear 13a is connected to the output shaft 14 which is stopped, it cannot rotate and moves toward the output shaft disk 14a along the right spiral gear 13a to move the ratchet disk 24a. Screwed). When the gear disc 15 no longer moves in the axial direction, the rotational force of the input shaft 13 is transmitted to the output shaft through the gear disc 15 and the ratchet disk 24a, so that the output shaft 14 rotates like the input shaft 13. Done. At this time, since the ratchet pool 17a faces the front, it does not interfere with the rotation. Accordingly, the gear disk 15, the ratchet disk 24a, and the output shaft 14 rotate together in one bundle, and the output shaft 14 is connected to the hub 30 so that the hub 30a is applied to the input shaft 13. It rotates in the same direction as the rotated direction.

On the contrary, when the hub rotates forward by an external force while the input shaft 13 is stopped, the output shaft 14 connected to the hub rotates so that the gear disc 15 connected to the output shaft 14 rotates together but the input shaft 13 ) Is stationary and moves in the axial direction on the helix gear 13a of the input shaft to tighten the ratchet disk 24. When the gear disc 15 no longer moves in the axial direction, the rotational force of the output shaft 14 is transmitted to the input shaft 13 through the gear disc 15 and the ratchet disk 24 so that the input shaft 13 is output shaft 14. Will rotate as shown. At this time, since the ratchet pole 17 faces the rear side, the ratchet pole 17 is engaged with the locking gear 24 of the disk to stop the rotation, and thus the output shaft 14 is stopped to stop the hub 10 from rotating. The rotation in the reverse direction is also reversed by the rotation of the input shaft 13 in the same manner as described above, but when the force is applied to the hub 10, the brake is applied.

Since the hub assembly is separated from the hub assembly and the power source, the hub assembly has many components, a large space, and a relatively large weight.

The present invention has been made to solve the above problems,

It is an object of the present invention to provide an electric wheel hub assembly in which a motor and a braking device are used together to pull and brake a wide range of wheel vehicles equipped with wheels.

Still another object of the present invention is that the rotational force generated by the motor in the hub assembly is less than the force capable of driving the wheel, but the maximum rotational speed of the wheel without locking the wheel is a power that can control the driving shaft of the braking device. It is to provide a modular electric wheel hub assembly that can limit or control the deceleration.

Still another object of the present invention is to provide an electric wheel hub assembly which prevents the rotation of the wheel even when a rotational force is applied to the wheel from the outside when the motor of the hub assembly is stopped.

Another object of the present invention is to provide a modular electric wheel hub assembly that can be assembled into one unit without special tools or other equipment.

It is yet another object of the present invention to provide a modular electric wheel hub assembly in which components configured to minimize the size and weight of the assembly are minimized and are simple to manufacture and maintain a uniform braking timing and braking force.

It is another object of the present invention to provide a means for stopping the vehicle by stopping the motor when the motor is stopped to prevent accidental accidents by losing the braking ability if the motor in the hub is not operated while the vehicle is running. To provide a modular electric wheel hub assembly.

It is another object of the present invention to provide an electric wheel hub assembly incorporating a braking device having a means for stopping the braking function of the hub assembly by simple operation.

Another object of the present invention is to provide a modular electric wheel hub assembly which is applied to all devices operated by rotation to exhibit the braking function.

Still other objects of the present invention will appear in part in the future and will become apparent.

1 is a cross-sectional view of a manual wheel hub assembly with pre-applied braking function

1A is a plan view taken along the line A-A 'of FIG.

1B is an exploded perspective view of a ratchet

2 is a cross-sectional view of a modular electric wheel hub assembly with a braking device;

3 is a cross-sectional view of an electric wheel hub assembly in which a planetary reducer is configured to connect a brake and a hub;

3A is a cross-sectional view of the powered wheel hub assembly with the third shaft protruding from the hub housing, modified in FIG.

3B is an exploded view illustrating the gear reducer component in more detail in the assembly of FIG. 3;

3C is a plan view taken along line A-A 'of FIG. 3B

FIG. 3D is a top view taken along line BB ′ in FIG. 3B

3E is a cross-sectional view of an electric wheel hub assembly in which a planetary reducer is positioned between a motor and a brake to connect a hub;

4 is a cross-sectional view of an electric wheel hub assembly in which a planetary reducer is configured to connect a motor and a braking device;

4A is a cross-sectional view of a powered wheel hub assembly incorporating a planetary reducer that is modified to be cantilever mounted by a first shaft;

5 is a cross-sectional view of the electric wheel hub assembly with braking device surrounding the motor sidewalls;

5A is a cross-sectional view of a wheel of a vehicle employing an electric wheel hub assembly.

In order to achieve the above object, embodiments of the present invention will be described with reference to the accompanying drawings. The electric wheel hub assembly takes various forms depending on the combination of the protruding shaft and the arrangement of the braking device and the planetary gear reducer in the hub housing.

The hub assembly of FIG. 2 further has a motor in the assembly shown in FIG. 1. The motor housing 35 includes a cylindrical side wall 35b, a generally discotic end wall 35a and an end cap 39. The first shaft 12 protrudes in the axial direction from the center of the end wall 35a and extends. The motor housing 35 includes a stack 32 and an annular winding 33. The winding wire 33 passes through the housing end wall 35a and the passage of the first shaft 12 to the motor housing 35. Out of the way, these leads extend into a connector coupled within the outer end of the first shaft 12. In order to facilitate guiding the conductor 38 out of the motor housing, the first shaft 12 can be formed into a tube as shown and filled with a plug of epoxy material to be sealed. Alternatively, the first shaft 12 can be separated from the motor housing 35 and forced into the end wall 35a from the inside.

Also on the axis of the winding 38 is a rotor 36 having a cylindrical side wall 35b and an end wall facing the open end of the motor housing 35. In order to rotatably mount the rotor 36 on the axis of the hub assembly 164, the first shaft 12 is provided with an inner end extension 35c protruding into the motor housing 35. The extended end 35c is staged to fix the outer race of the bearing, and the inner race receives the end of the rotor shaft 37 with the end. A spring washer is placed between the bearing and the seat of the first shaft extension 35c to provide an adjustment of the assembly 164 and preload the bearing to minimize noise during assembly operation.

The open end of the motor housing 35 is closed by an annular end cap 39. The end cap 39 comprises a circular flange or side wall, which is formed at the open end of the motor housing so that the ends of the motor housing are circumscribed to and coupled to the side wall 35b. Through-holes and bolt seats of the end caps formed in the flanges formed in the axial direction recessed a little longer than the bolt length outside the end cap 39 sidewalls in accordance with a plurality of threaded passages formed radially on the motor housing sidewalls 35b. The end cap 39 is releasably secured to the housing side wall 35b by means of a threaded bolt 42 which is rotated to. O-rings are positioned between the two elements to provide fluid sealing.

The end cap 39 is also provided with a circular flange that forms a seat for the outer race of the bearing so that when the end cap 39 is in close contact with the motor housing side wall 35b, the rotor 36 is configured to have a rotor shaft ( Is rotatably supported by a bearing to rotate about an axis of 37). In addition, when the cap 39 is fastened to the housing side wall 35b, the cap side wall or flange compresses the stack 32 of the motor and is placed in the dimensional tolerance between the stack length and the various workpieces of the motor and the eddy current loss in the motor. Minimize. The motor housing 35 thus forms a sealed motor housing 35 which completely surrounds the inner elements of the motor by the end cap 39 to protect these elements from the motor environment. In this connection, the bearing fixed to the end cap 39 is a sealed bearing so that no fluid from outside can pass through the bearing into the housing 35.

The braking device housing 41 adjacent to the motor includes another end cap 10 having a cylindrical side wall 41 a and a disc shaped end wall 10 extending from the end cap 39 of the motor. In addition, it has a plurality of through holes through which the thermally conductive fluid can freely enter and exit to easily release heat generated during braking. The rotor shaft 37 protruding from the motor end cap 39 is connected to the input shaft 13 of the braking device by being provided with a key groove and an end in an axial hole 13b formed at the end of the input shaft 13 of the braking device.

At the end of the input shaft 13 coupled with the motor rotor shaft 37, the input shaft disc 16, which is a tucked annular protrusion, is fixedly protruding by a key and a four-row spiral gear 13a at the middle end of the input shaft 13 is provided. Is formed. The other end 13b of the input shaft 13 penetrates the hollow portion of the output shaft 14 disposed on the same axis as the input shaft 13 and is supported by a pair of bearings so as to be rotatably installed, and penetrates the hub housing end cover. It protrudes out of the housing. In more detail, at the intermediate end of the input shaft 13 where the helical gear 13a ends, a stage is formed to fix the inner race of the bearing, and the outer race of the circular bearing is accommodated at the end of the output shaft 14c. . The torsion coil spring 21 is attached to the shaft of the subsequent input shaft 13, and one end is inserted and fixed to the input shaft shaft tip 13b, and the other end is inserted into the hole 14d formed on the inner circumferential surface of the output shaft. At the other end of the output shaft to which the end of the torsion coil spring 21 is fixed, a stage for the bearing is formed. The bearing has an inner race received by the input shaft 13 and fixed by screws and nuts 22 machined at its ends and rotatably supporting the output shaft 14 and the input shaft 13. A stage for accommodating the inner ring of the bearing supporting the end cover of the hub housing is formed continuously, and the end of the input shaft protrudes outward through the hub housing.

On the outer circumferential surface of the output shaft 14 is formed an output shaft disk 14a, which is an annular projection having a rectangular through hole 20a arranged in a radial circle, and the inner race of the bearing accommodated in the end cap 10 of the brake housing. The altar is built to accommodate. A plurality of bolt holes are formed at the end of the output shaft 14 protruding the end cap 10 so as to be removably fixed to the end cover 30a of the hub housing.

A four-row female spiral gear 15a is formed on the inner circumferential surface of the cylindrical shape, and the gear disk 15 which protrudes the annular projection on the outer circumferential surface is engaged with the input shaft spiral gear 13a. The uneven protrusions 20 formed at one end of the gear disc 15 are fitted to each other so as to smoothly move the square through-hole 20a provided in the output shaft disc 14a forward and backward. The gear disk 15 meshed with the spiral gear 13a by this connection rotates together when the output shaft 14 rotates, and moves in the axial direction according to the inclination of the spiral gear 14a.

The two sets of disks attached to the left and right sides of the annular projection formed on the main surface of the gear disc 15 are ratchet wheels 24 and 24a having a locking difference 25. The ratchet wheels 24 and 24a oppose the ratchet fools 17 and 17a which have a disc surface of an outer diameter smaller than the gear disc 15 and are installed inside the braking device housing side wall 41a. The ratchet wheel 24a and the pole 17a attached to the output shaft disk 14 side are installed such that the latch 25 and the ratchet portol 17a are not rotated when the ratchet wheel rotates to the left. In addition, the ratchet wheel 24 and the pole 17 which are wound on the input shaft disc 16 side are installed in such a way that the locking gear 25 and the ratchet pole 17 are not rotated in the right direction so as not to rotate. Let it work

The ratchet fools 17 and 17a are provided with a friction cap 145 in contact with each disk in the conversion flow part 148 so as to flow-change in accordance with the rotational direction of the disks 14a, 15 and 16. . When each disk rotates in the opposite direction in which the latch 25 of the ratchet pools 17 and 17a and the ratchet wheels 24 and 24a are engaged, the ratchet pool 17 is caused by friction between the friction cap 145 and the disc. 17a) is crushed. Even if the discs 14a, 15, and 16 are slightly reversed, the conversion fluid 148 and the friction cap 145 of the ratchetpool are inclined about the hinge 144 in the rotational direction of the disc, thereby causing the ratchetpool. As the position of the conversion flow section 148 is changed, the ratchet poles 17 and 17a which are lifted up are inclined to be caught, and the rotation of the ratchet wheels 24 and 24a is stopped.

The brake shoes 19 are fixed to both sides of the disks of the ratchet wheels 24 and 24a, respectively, to prevent slippage of the braking device by strong frictional force. Preferably, the disc ring having the brake shoes fixed to both surfaces is attached to both sides of the ratchet wheels 24 and 24a to improve the braking function. The gear disk 15 moves in a state where both the ratchet wheels 24 and 24a, the brake shoes 19 and the gear disk 15 are installed between the fixed input shaft disk 16 and the output shaft disk 14a. It is installed considering the thickness of each part to form a clearance (approximately 0.5mm) that can be braked quickly.

The same effect can be achieved by installing a one-way clutch in place of the ratchet (see Figures 3a and 5a). The one-way clutch inner race includes a disk with a wide face for braking and the outer race is inside the side wall of the brake housing. Is fixed to.

The torsion coil spring 21 is installed so that the spring 21 is not subjected to the force when the hunger disk 15 is in the intermediate position between the primary shaft disk 16 and the output shaft disk 14a. Therefore, when a torque less than a predetermined level occurs between the input shaft 13 and the output shaft 14, the gear disk 15 acts to be in the center position by the restoring force of the spring 21. In this state, the brake is not activated. This causes the gear disc 15 to move when a certain amount of torque is generated to actuate the brake to prevent frequent locking and flamming of the brake.

The open end of the brake housing 41 engages with the annular end cap 10 to form a housing. The end cap 10 comprises a circular flange or side wall, which is formed at the open end of the housing such that the ends of the housing are inscribed and mated to the sidewall 41a. The end cap 10 is formed by threaded bolts 43 which are rotated down with through holes and bolt seats of the end cap 10 to align with a plurality of threaded passages radially formed at the ends of the housing side walls 41a. It is releasably fixed to the housing side wall 41a. The end cap 10 is provided with a circular flange forming a seat for the outer race of the bearing so that when the end cap 10 is in close contact with the housing side wall 41a, the output shaft 14 is in line with the axis of the input shaft 13. It is rotatably supported by a bearing to rotate relative to it.

The hub housing 30 of the assembly is a cup-shaped member arranged to receive a motor and a braking device. The hub 30 includes a cylindrical side wall 30b, an annular first end wall 30c and an end cover 30a. The first end wall 30c has a center opening 30d for receiving the first shaft 12. The opening 30d is counted to provide a seat for the outer race of the self-lubricated and sealed shaft bearing allowing the hub 30 to rotate freely with respect to the shaft. Preferably, concave washers are present in the bearing and end wall 30c to allow the assembly to accept minor dimensional changes of the part and to preload the bearing to minimize noise and vibration.

The motor and brake are first assembled to the hub 30 by sliding into the open end of the hub 30 until the shaft 12 and the motor housing 35 lock against the bearing. They are held in the hub 30 by an annular end cover 30a. The end cover 30a has a central passage 30e which provides a tolerance for the input shaft 13 of the assembly, which is a circular, self-lubricating and sealed shaft bearing between the shaft 13 and the wall of the passage 30e. With this, the end cover 30 is free to rotate with the hub 30 with respect to the shaft 13.

The hub housing end cover 30a includes a plurality of threaded passages formed radially at the ends of the output shaft 14 protruding from the brake end cap 10 and through holes and bolt seats of the end covers 30a formed accordingly. It is releasably fixed to the output shaft end 14 by a screwed bolt 23 which rotates down. The periphery of the end cover 30a also includes a circular flange or side wall, which is formed such that the open end 30b of the hub is inscribed with and paired with the end sidewall of the end cover 30a. Ends are formed by threaded bolts 44 which are rotated downwardly with through holes and bolt seats of the end covers formed in the flanges of the end covers 30a in accordance with a plurality of threaded passages radially formed at the ends of the hub sidewalls 30b. The cover 30a is releasably fixed to the hub side wall 30b. Therefore, the hub housing 30 is rotated together with the output shaft 14 of the braking device.

When the end cover 30a is tightly fastened to the hub sidewall 30b, all the components of the assembly are held together in an appropriate coaxial relationship. There is an O-ring between the end cover 30a and the hub sidewall 30b to provide fluid sealing at that location. The spoke fixture 27 formed on the outer circumferential surface of the end of the side wall 30b of the hub housing is connected to the rim by the spokes 26 extending radially to form a wheel on which the hub assembly is mounted.

2 to 3D, the hub assembly of FIG. 3 further includes an outwardly projecting shaft 56 supporting the housing shown in FIG. 2 and a planetary gear reducer inside the hub housing. The end cap 10a of the brake housing 41 has a plurality of posts 58 protruding from the outer surface of the cap 10a. In the assembly shown, four such posts 58 are arranged in a circle. Two of these posts, ie the upper and lower posts, function as axles for a pair of annular planetary gears 54 rotatably mounted to the axles by circular bearings. The inner walls of the posts 58 and gear 54 are staged to provide seats for the bearings in which the outer race of the bearings is held on each gear by the snap ring.

The planetary gear 54 meshes with the sun gear 14e which is a pinion of the output shaft 14 protruding axially from the brake housing 41. The sun gear 14e rotates in accordance with the rotation speed transmitted from the gear disc 15. The post 58 extends slightly past the bearing that supports the planetary gear 54. This allows the bearing, gear to be held by the rigid retaining disk 62 coaxially mounted to the inner end of the fifth shaft 56 of the assembly. Therefore, the planetary gear 54 is fixed to the brake end cap 10a and rotated about those axes by the sun gear 14e slightly spaced from the holding disk 62. The retaining disk 62 is releasably secured to the end cap 10e by a threaded fastener 55 that extends through the hole in the retaining disk 62 and rotates down into the threaded passageway in the post 58. .

The final component of the gear reducer, ie the ring gear 53, is formed on the inner surface of the hub side wall 30d opposite the planetary gear 54. As shown in FIG. 3, the planetary gear 54 extends slightly past the side wall 41a of the braking device to engage with the teeth of the ring gear 53. Since the wheel shown in FIG. 2 rotates together with the motor, the motor requires a high power motor having good torque characteristics at a low speed. Therefore, relatively expensive motors should be used. However, a hub assembly with a reducer can provide a cheaper hub assembly because the desired output and rotational speed can be obtained by proper deceleration using a general motor.

The end cover 30a of the hub housing has a central opening that provides a tolerance for the fifth shaft 56. The opening 30e is counted to provide a seat for the outer race of the self-lubricated and sealed shaft bearing allowing the hub to rotate freely about the shaft 56. Preferably, a concave washer is present in the bearing and end cover 30a to provide coordination between the parts to provide adjustment, to pre-load the bearing to allow the assembly to accommodate minor dimensional changes of the part and to minimize noise and vibration. do.

The hub is sealed from the atmosphere, and heat generated from the motor, gear reducer, and brake device is conducted to the outside, so that the high torque output and stable braking performance can be maintained for a long time without overheating the motor and the brake device. Cooling of the hub assembly may be optimized by circulating a refrigerant or lubricant in the assembly. In the FIG. 3 assembly, the shaft 56 is provided with oil or grease fittings 57 to allow axial passageways and lubricants, such as oils, to be introduced into the assembly at the outer ends of the shafts or in the end covers 30a. Or a grease fitting 57 is provided to fill the hub with oil.

In the assembly shown in FIG. 3A, the input shaft 13 penetrates through the fifth shaft 56 and protrudes out of the hub housing. Power may be transmitted from the outside of the hub assembly by the protruding input shaft 13f. Therefore, the hub assembly can be driven by rotating the input shaft 13 from the outside.

In addition, the hub assembly is provided with one-way clutches 50 and 50a in place of the ratchet. One-way clutch The outer rings 49 and 49a are fixedly installed on the inner wall of the brake unit housing 41a, and the inner rings 48 and 48a are attached to the left and right sides of the annular projection formed on the main surface of the gear disc 15, respectively. Have a sprag. The inner ring also has a disk surface 48, 48a having an outer diameter larger than that of the gear disc 15 and operates opposite the outer ring 49, 49a. The one-way clutch 50a which is attached to the output shaft disk 14 side is installed so that the clutch inner ring 48a does not rotate when it rotates in the left direction. In addition, the one-way clutch 50 attached to the input shaft disc 16 side is installed so that the clutch inner ring 48 is not rotated when rotated in the right direction so as to operate in opposite directions. If necessary, adjust the support for supporting the one-way clutch's spread with solenoid to make free rotation without the one-way clutch.

The interior of the hub assembly shown in FIG. 3E is essentially the same as the assembly shown in FIG. However, the brake and the planetary gear reducer of FIG. 3 are symmetrically moved so that the reducer is located at the center of the hub. The end cap 39b of the motor housing has four posts 80 protruding from the outer surface of the cap 39b. These posts 80 function in pairs with the sleeves 79 protruding from the brake housing. Two of the four posts, the upper and lower posts, function as axles for a pair of annular planetary gears 54 rotatably mounted to the axles by bearings. The post 80 extends slightly past the bearing that supports the planetary gear 54. This allows the bearing, gear to be held by the sleeve 79 mounted coaxially. Therefore, the planetary gear 54 is fixed to the brake housing and rotated about its axis by the sun gear 14e. The ring gear 53 is formed on the inner surface of the hub side wall 30d opposite the planetary gear 54. As shown in FIG. 3E, the planetary gear extends slightly past the side wall of the brake to engage with the teeth of the ring gear 53.

One end of the input shaft 13 is connected to the rotor shaft 37 and the coupling 77 of the motor. The other end on which the input shaft disc 16 is mounted is rotatably supported by receiving the outer race of the bearing in which the inner race is fixed by the inner end extension 78a protruding inward from the brake housing end cap 10b. . The fifth shaft 78 protruding from the braking housing end cap 10b to the outside of the hub housing is rotatably supported by the end cover 30b of the hub housing.

In addition, the end cap 39b has side walls extended within a range where the planetary gear 54 does not interfere. The side wall maintains a space between the brake unit housing 41 and the motor housing 35 together with the support formed by coupling the post 80 and the sleeve 79 to connect the two housings. The case elements in the hub housing 30 are thus fixed in two ways in accordance with a plurality of threaded passages radially formed in the motor housing sidewalls. The flange of the part where the planetary gear 54 operates is fixed by the bolt 42 through a through hole formed in the flange, and the end cap 39b portion having the side wall is a double-threaded bolt 69 in which both ends are threaded. And nuts 68 are releasably fixed. That is, one side end portion is formed by being axially recessed outside the side wall of the braking device and the through hole formed in the side wall of the end cap 39b of the motor housing to the plurality of bolts 69 fixed by being rotated down on the motor housing side wall 35b. The nut 68, which is inserted into the through hole of the flange in turn and tightened downward, is seated on the bolt seat on the flange so that the case elements are releasably fixed to the motor housing side wall 35b (see Fig. 4).

The hub assembly shown in Figure 4, It further has a planetary gear reducer between the motor 35 and the braking device 41 of the hub assembly 30 shown in FIG. Referring to the description of FIG. 2, when the motor rotates, the sun gear 37a, which is a pinion at the end of the rotor shaft 37, rotates the planetary gear 54 of the gear reducer. The planetary gear 54 supported and rotated by the post 73a rotates the sun gear 37a by a ring gear 70 fixedly installed between the end cap 39a of the motor housing 35 and the brake unit housing 41. It rotates with the post 73a which revolves. The retaining disk 73 containing the post 73a is connected to the input shaft 13 of the braking device by a supply and transmits a slower rotation with respect to the rotor shaft 37 to the braking device 41. Cooling of the planetary reducer circulates oil through the brake housing 41 having a plurality of through holes.

The case elements in the hub housing 30 are releasably secured by both threaded bolts 69 and nuts 68 threaded at both ends in accordance with a plurality of threaded passages radially formed on the motor housing sidewall 35b. do. That is, the through hole formed in the end cap 39a of the motor housing and the through hole formed in the ring gear 70 and the braking device of the plurality of bolts 69 whose one end is rotated downward on the side wall of the motor housing 35b. The nut 68, which is rotated downward and tightened by inserting through holes of the flange formed recessed in the axial direction outside the side wall 41, is seated on the bolt seat on the flange so that the case elements are released on the motor housing side wall 35b. It is possible to be fixed

The electric wheel hub assembly is equipped with a ratchet or one-way clutch to control the hub's rotation by external forces. However, depending on the external situation, the hub may need to rotate freely. In other words, the battery can not be driven due to battery discharge or control system failure, or it must be installed in the vehicle to be pulled or moved manually. This free rotation of the hub is achieved by keeping the one-way clutch 50, 50a or ratchet 17, 17a in neutral or by relatively fixed two shafts in the neutral position so that there is no difference in rotation speed between the input shaft 13 and the output shaft 14 Can be.

Referring to FIG. 1A, the solenoid 45 is installed on the braking device housing side wall 41a directly above the ratchetpools 17 and 17a and is connected to the ratchetpools 17 and 17a by a wire 45b or a stopper 45a. Connected with When power is applied to the solenoid 45, the wire 45b or the stopper 45a is pulled to limit the operation range of the ratchet pool such that the ratchet fools 17 and 17a do not engage with the catch 25. The braking function by the ratchet is therefore stopped and the hub can be freely rotated. A power supply 46 installed along the outer wall of the side wall by protruding the motor side wall 35b through the stator winding 33 from the connector at the end of the first shaft 12 by the braking function stop switch by the braking function stop switch. It is applied to the solenoid 45 through.

Referring now to FIG. 4A, another modular hub assembly 30 mounted with a cantilever as shown in FIG. 4 is suitable for rotating a wheel with standard tires. The interior of the assembly 30 is essentially the same as the assembly 30 shown in FIG. 4. However, the assembly 30 has a hub different from the embodiment described above. More specifically, the end cover 30c of the hub housing has no center opening. The hub forms an end jaw and counterbores the inner wall of the end cover 30c so that the end of the output shaft 14 can be engaged with the axis to maintain the axis. If the hub assembly does not need to be powered from the outside, external exposure of the input shaft is unnecessary.

The hub 30 also has a flange 95 with cylindrical sidewalls 30d radially ribed to increase strength and cooling effect. That is, the flange 95 of the outer circumference is formed in the middle of the side wall 30d. The flange 95 provides a seat for the annular tire rim 96 with radially inwardly extending pins or flanges having an inner diameter slightly larger than the outer diameter of the hub wall 30d. The tire rim 96 may be releasably secured to the hub flange 95 via the rim 96 by a circular arrangement of bolts 97 which are turned down into the threaded holes of the hub flange 95. . Therefore, if the tire T or the rim 96 is damaged, the tire rim 96 can be removed from the hub assembly 30 without removing the assembly 30 from the support S.

The battery 140, which is a power supply source of the driving motor embedded in the wheel illustrated in FIG. 4A, is mounted outside the hub housing sidewall 30d. An electrical contact 134 formed outside the motor end wall 35a extends into the motor housing 35 and is connected to an electrical connector mounted at the end of the first shaft 12. The axial ring-shaped connector 131 formed inside the hub housing end wall 30c opposite the contact point extends outside the hub housing through the end wall and the housing side wall 30d. The lead 139 is connected to the battery 140 to supply power. The contact 134 and the connector 131 are insulated from the housing, which is a conductor, so as not to be short-circuited and sealed with an oil seal 132 so as not to be exposed to oil for cooling. The battery 140 is a ring-shaped battery or a plurality of hexahedron batteries surrounding the hub side wall 30d is mounted between the spokes of the hub housing or in the ribs.

The hub assembly 167 shown in FIG. 5 is a thinner powered wheel hub assembly in which the braking device surrounds the sidewall of the motor 166. The hub assembly 167 includes a shaft 12 and a planetary gear reducer extending outward from the end wall 35a of the motor housing. The planetary gear 54 meshes with the sun gear 37a which is a pinion of the rotor shaft 37 protruding axially from the motor housing 166. The end cap 39b of the motor housing has a plurality of posts 80 protruding from the outer surface of the cap 39b. Two of the four posts function as axles for a pair of annular planetary gears 54 rotatably mounted to the axles by bearings. The inner wall of the post 80 and the gear 54 is the outer race of the bearing is held on each gear by the snap ring.

The post 80 extends slightly past the bearing that supports the planetary gear 54. This allows it to be held by the sleeve 79 of the retaining disk 83 mounted coaxially. Therefore, the planetary gear 54 is fixed to the motor housing end cap 39b and rotated about those axes by the sun gear 37a slightly spaced from the retaining disk 83. The retaining disk 83 is releasably secured to the end cap 39b by a threaded bolt 88 that extends through a hole in the disk 83 and rotates down into the threaded passageway in the post 80. In addition, the fifth shaft 56, which is a shaft extended outward from the holding disk 83, extends along an axis from the first shaft 12 and the second shaft 37, and all the shafts are on the same line but are separated from each other. .

The input shaft 82 is a hollow shaft, which is spaced apart from the side wall 35b of the motor housing, surrounds about 1/2 of the motor housing side wall 35b in the axial direction, and has a multi-threaded male screw gear on the main surface of the end of the input shaft 82. Has 82a. The input shaft disc 86, which is a disk-shaped annular projection, is attached to the main surface of the input shaft on which the male screw difference ends. In addition, at the other end, a ring gear 87 facing the planetary gear 54 is formed to transmit the rotation of the motor to the input shaft 82 more slowly. The ring gear 87 formed on the input shaft 82 can achieve a higher gear reduction ratio than the hub assembly shown previously. That is, the outer diameter of the ring gear 87 mounted on the input shaft 82 can be extended to the outer diameter of the input shaft disc 86, so that it can be easily replaced by a gear reducer having a higher reduction ratio. As shown in FIG. 5, the planetary gear 54 extends slightly past the side wall 35b of the motor to engage with the teeth of the ring gear 87.

The hollow output shaft 81 is spaced close to the side wall 35b of the motor housing, surrounds the other half of the motor housing side wall 35b in the axial direction, and is spaced apart from the input shaft 82. An output shaft disk 85 having a disk-shaped annular projection at the tip of the output shaft 81 and having an uneven projection 89a for connection with the gear disk 89 is located close to the first end wall 100a of the hub housing 100. It is stuck.

The gear disk 89 having a disk-shaped annular protrusion formed on the main surface and a multi-threaded female spiral gear on the hollow inner peripheral surface is meshed with the male screw gear 82a, and the spiral gear 82a of the input shaft 82 is axially oriented. The disk surface has an uneven protrusion 89a connected to the square through hole of the output shaft disk 85 at an end thereof so as to move along and rotate like the output shaft 81.

The ratchet wheels 90 and 90a having the locking teeth 25 attached to the left and right sides of the disk formed on the main surface of the gear disk 89 are rotated so that the ratchet wheels 90 and 90a rotate only in different directions. Engage with restricting ratchetpools (17, 17a) to limit the rotation of the hub assembly. The ratchet fools 17 and 17a are fixedly installed in the side wall 83a extending from the holding disk 83. The extended sidewall 83a of the retaining disk 83 supporting the ratchetpotols 17 and 17a extends to the position slightly past the output shaft disk 85 and has a width equal to the diameter of the motor 166 and the motor 166. ) Covering from above. In addition, a plurality of rollers 91 are mounted at the end of the side wall 83a to be rotatably supported from the hub side wall 100c. The rollers prevent the side wall 83a of the retaining disk from being pushed back by the operation of the ratchet to interfere with the hub housing side wall 100c.

The hub housing 100 includes a first end wall 100a rotatably accommodating the first shaft 12, an end cover 100b rotatably accommodating the fifth shaft 56, and the retaining disk 83. Has a sidewall 100c spaced apart from the extended sidewall 83a extending between the first end wall 100a and the end cover 100b.

The solenoid 135 is mounted on the output shaft 81 fixed to the first end wall 100a of the hub housing to adjust the operation and stop of the braking function. The power source extends from the electrical connector mounted on the first shaft 12 into the motor housing 166 and faces the contact 134 through an electrical contact 134 formed outside the motor housing first end wall 35a. The hub housing is transmitted through an axial ring-shaped connector 131 formed inside the first end wall 100a, the first end wall 100a, and the output shaft 81. When power is applied to the solenoid, the actuator () connected to the solenoid 135 is inserted forward into the hole formed in the input shaft end 82 so that the input shaft 82 and the output shaft 81 rotate at the same speed. This allows the gear disc 89 to be in a neutral position so that the ratchet wheel remains free. Therefore, the braking function is stopped and the hub assembly is free to rotate.

The sprocket 136 is mounted on the end cover 100b of the hub housing such that the hub 167 of the assembly is manually rotated by the sprocket 136 and the chain drive or motor 166 of the assembly or a combination of two power sources. It is possible. If the motor 166 rotates the hub 100 faster than the sprocket 136, the sprocket is freed from the wheel by the clutch 137.

In addition, the hub 140 is driven by a chain drive in a state in which the braking function of the hub is stopped without being supplied with power to the motor 166 of the hub assembly 167 by the battery 140 and the controller for supplying power to the hub assembly. And rotated by the sprocket 136, the motor 166 acts as a generator for guiding the current to recharge the battery 140. This produces a DC output that charges the battery 140. However, in the case of the input shaft 37c protruding from the hub housing as shown in FIG. 5A, unlike the sprocket 136, when the input shaft 37c is rotated by the outside regardless of the operation of the braking device, the motor 166 is rotated. It acts like a generator. When the regenerative brake controller is operated in a state in which the braking function is not operated, the motor 166 of the hub assembly 167 operates as a generator and may reduce or stop the rotational speed of the hub assembly having inertial force. This energy is recovered to the battery 140.

5A is a hub assembly in which the rotational direction is controlled by the one-way clutch and the motor rotor shaft penetrates through the fifth shaft 56 and protrudes out of the hub. One-way clutch The outer rings 49c and 49d are fixed to the extended cylindrical sidewall 83b of the retaining disk 83. The inner races 48c and 48d are attached to the left and right sides of the annular projection formed on the main surface of the gear disc 89 and have disks 48c and 48d and a spog, respectively. The inner ring also has disk faces 48c and 48d of outer diameter larger than the gear disk 89 and operates opposite the outer rings 49c and 49d. The one-way clutch 50d, which is attached to the output shaft disk 85 side, is installed so that the clutch inner ring 48d does not rotate when it rotates in the right direction. In addition, the one-way clutch 50c wound on the side of the input shaft disk 86 is installed so that the clutch inner ring 48c does not rotate when the left side rotates, and is operated in opposite directions. Thus, the output of the motor is transmitted to the hub, but the transmission of torque from the hub to the motor is interrupted.

The rotor shaft 37 mounts a key and a snap ring on both sides and penetrates the extended shaft 56 of the retaining disk 83 to secure the pinion gear 76 engaged with the planetary gear 54 on the shaft. The hub housing 167 protrudes outward. Power may be transmitted from the outside of the hub assembly by the protruding rotor shaft. Therefore, the hub assembly can be driven by rotating the input shaft 13 from the outside.

From the description so far, the hub assembly with braking function allows the hub housing to rotate only by rotation of the input shaft 13. This makes it possible to reduce or stop the rotational speed of the output shaft 14 having a relatively large rotational force with a small motor of low output connected to the input shaft 13. In other words, the rotational speed of the motor instructed from the controller is the maximum allowable rotational speed of the output shaft 14. When the motor rotates below the indicated rotational speed by the load of the output shaft 14, the motor is protected by the motor protection circuit of the controller. Indeed, the motor output required for braking is sufficient to control the inertia forces of the input shaft 13 and the input shaft disk 16. Therefore, the cart, which is continuously accelerated on the downhill road, is applied to the cart towed by manpower, and the braking device is repeatedly locked and released by the indicated rotational speed of the small motor to maintain a constant driving speed.

In the above, the object of the present invention is clearly and efficiently achieved from the above description, and it is possible to change the structure without departing from the scope of the present invention, so all the contents included in the above description and the accompanying drawings are for illustration. It is not intended to be limiting. It is also to be understood that the claims are intended to cover all inclusive and unique features of the inventions described herein.

As described above, the modular hub assembly according to the present invention is applied to a wide range of wheel vehicles, such as a towing vehicle and a power towing vehicle, the wheel is mounted and operated

Motors, brakes and reducers can be modularized into one unit and assembled into one unit without special tools or equipment.

Although the rotational force generated by the motor in the hub assembly during braking cannot drive the wheel, the rotational speed of the wheel can be limited or the deceleration can be controlled with a force that can control the driving shaft of the braking device.

When the motor is stopped, even if a force is applied to rotate the wheel, it prevents the wheel from rotating and prevents the vehicle from being pushed back when the vehicle is going uphill.

The braking device is operated in accordance with the rotation of the rotor of the motor even in emergency situations such as the inability of the motor due to the burnout of the control device while driving.

Hub assemblies for vehicles can consist of much fewer parts than engine driven vehicles. That is, there is no need for drive shafts, couplings, clutches, differentials, front or rear axles, starters, torque converters, as well as anti-lock brakes and parking brakes.

Brake system is relatively simple because of the mechanical configuration that does not require separate accessory for braking, but compared to the existing braking device, the braking function is compounded as above, making it lighter, smaller, cheaper, and easier to assemble and repair. Do.

In addition, by using a low-power motor that cannot be towed to a tow vehicle such as a wheelchair and a wheelbarrow, it is possible to construct a tow vehicle that can control the maximum speed of driving that can control the speed and stop downhill according to the rotational speed of the motor. Can be.

With the above advantages, it can be applied to all rotary devices such as automatic warehouse transporting device to perform a smooth braking.

Claims (26)

In the electric wheel hub assembly having an axis, A first housing having first and second end walls defining a housing inner surface and sidewalls extending between the end walls; Stator windings in the first housing; A rotor rotatably mounted to a first housing end wall to be rotatable about the axis within a winding; A first shaft extending outwardly from the first wall along the axis; A second shaft rotatably supported on a first wall and extending from the rotor along the axis through the second wall; A second housing continuous to the first housing having a second, third end wall forming a housing inner surface and a sidewall extending between the end wall; A third shaft, which is a rotary shaft connected to the second shaft by a key and having a multi-threaded male tooth at the distal end in the second housing; A first disc, which is a disk annular protrusion, which is wound close to the second end wall of the third shaft tip; A fourth shaft rotatably received through the hollow portion formed in a cylindrical shape and rotatably housed in a third end wall; It has a disk-shaped annular projection formed on the main surface having a multi-threaded female helix gear on the hollow inner peripheral surface and is fitted to the male helix gear so as to move along the helix gear in the axial direction and have a connecting means such that the rotation is like a fourth shaft. Second disc; A third disk having a disk-shaped annular protrusion wound close to the third end wall of the fourth shaft tip and having a second disk and connecting means; Hollow discs are squeezed between the second disc and the third disc, and between the second disc and the first disc, respectively, fixedly installed inside the side wall of the second housing opposite the disc, and each disc rotates only in a different direction. Means for limiting rotation so that; A first end wall rotatably receiving the first shaft, a second end wall protruding through the third end wall and fixedly connected to a fourth shaft rotatably supported on an axial third shaft, first and second A hub housing extending between the end walls and having side walls spaced apart from the first and second housings to tightly surround the housing; Connecting means for connecting the fourth shaft and the hub housing such that when the stator winding is energized, the rotor rotates about the first shaft and the first and second housings at a selected speed and the hub housing rotates with the fourth shaft. Modular electric wheel hub assembly with braking device, comprising: In the electric wheel hub assembly having an axis, A first housing having first and second end walls forming a housing inner surface and sidewalls extending between the end walls; Stator windings in the first housing; A rotor rotatably mounted to a first housing end wall to be rotatable about the axis within a winding; A first shaft extending outwardly from the first wall along the axis; A second shaft rotatably supported on a first wall and extending from the rotor along the axis through the second wall; A second housing having a second, third end wall and a sidewall extending between the end wall, the second housing forming a housing interior surface, the second housing being continuous to the first housing; A third shaft, which is a rotary shaft connected to the second shaft by a key and having a helical tooth at a distal end in the second housing; A first disc, which is a disk annular projection, which is attached to a third main surface of the main shaft close to the second end wall; A fourth shaft rotatably received through the hollow portion formed in a cylindrical shape and rotatably housed in a third end wall; It has a disk-shaped annular projection formed on the main surface having a multi-threaded female helix gear on the hollow inner peripheral surface and is fitted to the male helix gear so as to move along the helix gear in the axial direction and have a connecting means such that the rotation is like a fourth shaft. Second disc; A third disk having a disk-shaped annular protrusion wound close to the third end wall of the fourth shaft tip and having a second disk and connecting means; Hollow discs are squeezed between the second disc and the third disc, and between the second disc and the first disc, respectively, fixedly installed inside the side wall of the second housing opposite the disc, and each disc rotates only in a different direction. Means for limiting rotation so that; A pinion at the fourth shaft end outside the second housing; A plurality of planetary gears rotatably mounted to the third end wall outside the second housing and engaged with the pinion; A fifth shaft extending outwardly from the third wall along the axis; Connecting means for connecting the fifth shaft to the third end wall such that all of the shafts are collinear but separated from each other; A first end wall rotatably receiving the first shaft, a second end wall rotatably receiving the fifth shaft, a sidewall extending between the first and second end walls and spaced apart from the first and second housings; A hub housing having a housing and tightly surrounding the housing and the planetary gear; When current is applied to the stator windings, the hub housing rotates about the first shaft and the first and second housings at selected speeds and engages planetary gears so that the hub housing rotates about the first and fifth shafts at slower speeds. Modular electric wheel hub assembly with a built-in braking device comprising a; ring gear formed on the inner surface of the hub housing facing the gear In the electric wheel hub assembly having an axis, A first housing having first and second end walls forming a housing inner surface and sidewalls extending between the end walls; Stator windings in the first housing; A rotor rotatably mounted to a first housing end wall to be rotatable about the axis within a winding; A first shaft extending outwardly from the first wall along the axis; A second shaft rotatably supported on a first wall and extending from the rotor along the axis through the second wall; A pinion at the second shaft end outside the first housing; A plurality of planetary gears engaged with the pinion; A ring gear facing the planetary gear and connecting sidewalls of the first housing and the second housing; A disk having a post connected to the third shaft and rotatably receiving the planetary gear; A second housing having a third, fourth end wall forming a housing inner surface and sidewalls extending between the end walls; A third shaft, said disk being a rotation shaft connected by a supply and rotatably received at a third end wall and having a multi-threaded helical gear at a distal end; A first disc, which is a disk annular protrusion, which is wound close to the third end wall of the third shaft tip; A fourth shaft rotatably received at the fourth end wall and receiving the third shaft rotatably through the hollow portion formed in a cylindrical shape and having a disk-shaped annular protrusion near the fourth end wall; It has a disk-shaped annular projection formed on the main surface having a multi-threaded female helix gear on the hollow inner peripheral surface and is fitted to the male helix gear so as to move along the helix gear in the axial direction and have a connecting means such that the rotation is like a fourth shaft. Second disc; A third disk having a disk-shaped annular protrusion wound close to the third end wall of the fourth shaft tip and having a second disk and connecting means; Hollow discs are squeezed between the second disc and the third disc, and between the second disc and the first disc, respectively, fixedly installed inside the side wall of the second housing opposite the disc, and each disc rotates only in a different direction. Means for limiting rotation so that; A first end wall rotatably receiving a first shaft, a second end wall protruding through the fourth end wall and fixedly connected to a fourth shaft rotatably supported on an axial third shaft, first and second A hub housing extending between the end walls and having side walls spaced apart from the first and second housings to tightly surround the housing; Connecting means connecting the fourth shaft and the hub housing such that when the stator winding is energized, the rotor rotates with respect to the first shaft and the first housing at a selected speed and with a fourth shaft rotating at a slower speed than the rotor. Modular electric wheel hub assembly with a braking device comprising a; In the electric wheel hub assembly having an axis, A first housing having first and second end walls forming a housing inner surface and sidewalls extending between the end walls; Stator windings in the first housing; A rotor rotatably mounted to a first housing end wall to be rotatable about the axis within a winding; A first shaft extending outwardly from the first wall along the axis; A second shaft rotatably supported on a first wall and extending from the rotor along the axis through the second wall; A second housing having a third, fourth end wall and a sidewall extending between the end wall, the second housing forming a housing inner surface, the second housing being separated from the third end wall; A fifth shaft extending outwardly from the fourth wall along the axis; A third shaft coupled to the second shaft and rotatably supported on the fourth wall in the second housing, the third shaft being a rotary shaft having a multi-threaded numerical difference at the distal end; A first disc, which is a disk annular protrusion, which is wound close to the fourth end wall of the third shaft tip; A fourth shaft rotatably received through the hollow portion formed in the cylindrical shape and rotatably received in the third end wall; It has a disk-shaped annular projection formed on the main surface having a multi-threaded female helix gear on the hollow inner peripheral surface and is fitted to the male helix gear so as to move along the helix gear in the axial direction and have a connecting means such that the rotation is like a fourth shaft. Second disc; A third disk having a disk-shaped annular protrusion wound close to the fourth end wall of the fourth shaft tip and having a second disk and connecting means; Hollow discs are squeezed between the second disc and the third disc, and between the second disc and the first disc, respectively, fixedly installed inside the side wall of the second housing opposite the disc, and each disc rotates only in a different direction. Means for limiting rotation so that; A pinion of the fourth shaft end between the second end wall and the third end wall; A plurality of planetary gears rotatably mounted to the second end wall and the third end wall and engaged with the pinion; A first end wall rotatably receiving the first shaft, a second end wall rotatably receiving the fifth shaft, a sidewall extending between the first and second end walls and spaced apart from the first and second housings. A hub housing having a housing and tightly surrounding the housing and the planetary gear; When the stator winding is energized, the rotor rotates about the first and fifth shafts at selected speeds and engages planetary gears so that the hub housing rotates against the first and fifth shafts at a slower speed, facing the planetary gears. Modular electric wheel hub assembly with a built-in braking device comprising a; ring gear formed on the inner surface of the hub housing In the electric wheel hub assembly having an axis, A first housing having first and second end walls defining a housing inner surface and sidewalls extending between the end walls; Stator windings in the first housing; A rotor rotatably mounted to a first housing end wall to be rotatable about the axis within a winding; A first shaft extending outwardly from the first wall along the axis; A second shaft rotatably supported on the first wall and extending from the rotor along an axis through the second wall; A pinion at a second shaft end outside the first housing; A plurality of planetary gears rotatably mounted to the second end wall outside the first housing and engaged with the pinion; A third end wall separated from the second wall to rotatably support the planetary gear and have an extended sidewall; A fifth shaft extending outwardly from a third wall along the axis; Connecting means for connecting the third end wall to the second end wall such that a fifth shaft extends along an axis from the first and second shafts such that all the shafts are collinear but separated from each other; A first end wall rotatably receiving the first shaft, a second end wall rotatably receiving the fifth shaft, and spaced apart from the elongated sidewall of the third end wall and extending between the first and second end walls A hub housing having side walls therein; A hollow third shaft spaced apart from the side wall of the first housing along the axis and enclosing one half of the side wall of the first housing in the axial direction and having a multi-threaded male helix difference on the main surface thereof; 1st disk which is a disk-shaped annular protrusion attached to the 3rd main shaft main surface to which a male-toothed gear ends. A ring gear opposed to the planetary gear mounted on the end of the third shaft inner peripheral surface; A hollow fourth shaft proximately spaced from the sidewall of the first housing and surrounding the other half of the first housing sidewall in the axial direction and spaced apart from and facing the third shaft; A third disk having a disk-shaped annular protrusion wound on the fourth shaft tip and having a second disk and a connecting means; It has a disk-shaped annular projection formed on the main surface having a multi-threaded female helix gear on the hollow inner peripheral surface and is fitted to the male helix gear so as to move along the helix gear in the axial direction and have a connecting means such that the rotation is like a fourth shaft. Second disc; A third disk having a disk-shaped annular protrusion wound on the tip of the fourth shaft close to the first end wall of the hub housing and having a second disk and a connecting means; Hollow discs are respectively squeezed between the second disc and the third disc and between the second disc and the first disc and fixedly installed in a side wall extending from the third end wall opposite the disc, with each disc being one of the other. Means for limiting rotation to rotate only in a direction; Connection means connecting the first end wall of the hub housing with the fourth shaft so that when the stator winding is energized, the rotor rotates about the first and fifth shafts at a selected speed and the hub housing rotates with the fourth shaft. Modular electric wheel hub assembly with a braking device comprising a; 6. The modular transmission of claim 5, wherein a second shaft extending through the fifth shaft protrudes outside the hub housing so as to transmit rotational force to the second shaft from the outside of the hub assembly. Wheel hub assembly The method according to any one of claims 1 to 6, Means for limiting rotation such that the hollow disk squeezed between the second disc and the third disc and between the second disc and the first disc rotates only in one direction different from each other. Modular electric wheel hub assembly with built-in braking device, characterized in that used as The method according to any one of claims 1 to 6, Means for limiting rotation such that the hollow disk squeezed between the second and third discs and between the second and first discs rotates only in one direction different from each other; Modular electric wheel hub assembly with a built-in brake system, characterized in that the one-way clutch is used to fix the outer race inside the side wall 6. The braking device according to claim 1, wherein the assembly can be mounted as a cantilever by the first shaft by surrounding the shaft extending from the hub assembly with the hub second end wall. Modular powered wheel hub assembly. 8. The apparatus of claim 7, further comprising: a braking function stop switch for stopping the braking function of the braking device by supplying and controlling the power output from the battery so that the braking device is not operated; And It is mounted on the side wall of the brake unit adjacent to the ratchetpool, and is driven by the operation of the brake stop switch. Modular electric wheel hub assembly with a braking device further comprises a; solenoid limited to 9. The apparatus of claim 8, further comprising: a braking function stop switch (S) for stopping the braking function of the braking device by supplying and controlling power output from the battery so that the braking device is not operated; And Adjacent to the one-way clutch, it is mounted on the side wall of the braking device housing and is driven by the operation of the braking function stop switch (). Modular electric wheel hub assembly with a braking device, characterized in that it further comprises a; solenoid for limiting the operating or inoperative position 6. The brake function stop switch according to claim 5, wherein the third shaft and the fourth shaft are rotated at the same rotational speed so that the braking function is stopped by supplying and controlling the power output from the battery so that the braking device is not operated. ; And A fourth shaft mounted on a fourth shaft of the hub assembly and driven according to the operation of the braking function stop switch, by pulling or pushing the actuator into or out of the hole at the end of the third shaft. Modular electric wheel hub assembly with a built-in braking device characterized in that it further comprises; a solenoid for performing the coupling and separation of the According to any one of claims 1 to 6, Volume switch or control device for adjusting the rotational speed of the motor by supplying and controlling the power output from the battery for the purpose of limiting the maximum running speed of the towing wheel mounted to the vehicle; Modular electric wheel hub assembly with a built-in; low-power motor capable of controlling the rotational speed of the brake input shaft, although the torque generated by the motor is less than the force to pull the vehicle. The wall of the hub housing according to any one of claims 1 to 6, wherein when the hub rotates with respect to the first shaft and the second housing, the fluid is circulated through the spaced side walls so that the heat generated in the housing is caused by the fluid to form the wall of the hub housing. And a means for introducing a thermally conductive fluid into the hub to be conducted to the outside through the modular electric wheel hub assembly. The torsion coil spring according to any one of claims 1 to 6, further comprising a torsion coil spring installed between the third shaft and the fourth shaft and having one end fixed to the third shaft and the other end fixed to the fourth shaft. Modular electric wheel hub assembly with a braking device, characterized in that. 7. The modular electric wheel hub assembly of claim 1, wherein the rotor, motor side wall, brake side wall, and side wall of the hub are cylindrical. 7. The planetary gear according to any one of claims 2 to 6, wherein each planetary gear has a first section that engages the pinion and a ring gear that engages the ring gear and has a second section that is collinear with the first section so that the assembly can achieve two-step gear reduction. Modular electric wheel hub assembly with a braking device, characterized in that. 7. The sprocket of claim 1, further comprising a sprocket and a one-way clutch connected between the sprocket and the hub second end wall such that the sprocket is rotatable about the axis in only one direction relative to the hub. Modular electric wheel hub assembly with built-in brakes. 7. A tire according to any preceding claim, further comprising: a tire rim surrounding the hub sidewalls; A plurality of spokes having corresponding first and second ends; Means for connecting the first end of the spoke to the hub; And And a means for connecting the second end of the spoke to the rim such that the rim lies at the center of the axis. 7. A tire according to any preceding claim, further comprising: a tire rim surrounding the hub sidewalls; And means for connecting the tire rim to the hub sidewalls. 7. The modular electric wheel hub assembly of claim 1, further comprising a tire that engages around the hub sidewalls. 7. An electrical connector as claimed in any preceding claim, further comprising: an electrical connector mounted to the first shaft; An electrical lead extending from the connector into the housing along the first shaft; And And a means for connecting the conductors to the stator windings. 23. The apparatus of claim 22, further comprising: an electrical connector mounted to the first shaft; An electrical lead extending from the connector into the motor housing and beyond the housing sidewall to the brake housing outside the housing; And And means for connecting the lead to a solenoid winding mounted to a side wall of the braking housing. 23. The apparatus of claim 22, further comprising: an electrical contact formed outside the motor housing first end wall; An electrical lead extending from the contact into the housing and connected to an electrical connector mounted to the first shaft; An axial ring connector opposed to the contact formed inside the hub housing first end wall; A lead extending out of the hub housing past the first end wall and the housing sidewall in the connector; Means for protecting the contact and the connector against short circuiting; and And a means for sealing to prevent exposure to oil; and a modular electric wheel hub assembly with a braking device. 25. The method of claim 24, further comprising: a battery which is a power supply source of a drive motor incorporating a hub assembly mounted outside the hub housing sidewalls; And a means for connecting a battery and a lead extending outwardly through the hub housing sidewalls. The apparatus of claim 1, further comprising: means for sealing the interior of the hub from the outside; and And means for sealing the interior of the first housing from the interior of the hub. The modular wheel assembly of claim 1, further comprising a braking device.