Wheel module and vehicle having same

Abstract

The present embodiments provide a wheel module and a vehicle having same, the wheel module comprising: a knuckle rotatably coupled to a lower arm, coupled to a vehicle body, to steer a road wheel; a connection link having a lower end coupled to the upper end of the knuckle; a steering system fixed to the vehicle body and coupled to the upper end of the connection link to rotate the connection link and thereby steer the road wheel; a suspension system having one end coupled to the knuckle and the other end coupled to the connection link; a wheel driving system installed on the inside of the road wheel to provide a rotational force to the road wheel; and a braking system installed on the inside of the wheel driving system to adjust the rotational speed of the road wheel.

Description

Wheel module and vehicle equipped therewith

[0001] The present embodiments relate to a wheel module and a vehicle having the same.

[0002] In general, automobiles are equipped with a drive system in which power generated from an engine is transmitted to the road wheels through power transmission devices such as a crankshaft and a transmission, a steering system to control the direction of travel of the automobile, a braking system to control the speed of the automobile, and a suspension system to absorb shock from the road surface caused by driving.

[0003] However, as electric vehicles using electric motors instead of engines have been developed and put into use recently, in-wheel motor systems that mount electric motors on road wheels are also being developed.

[0004] However, since these in-wheel motor systems are structured to require separate steering, braking, and suspension systems to be installed in the vehicle, there is not much difference in volume or weight compared to conventional engine vehicles, and there were many problems in terms of reducing the overall weight of the vehicle and reducing fuel efficiency.

[0005] In particular, with the recent rise of autonomous driving in automobiles, there is a growing need for research on wheel modules that can significantly reduce the assembly process when assembling them into automobiles while ensuring precision, reliability, and durability for each road wheel by integrating the drive system, steering system, braking system, and suspension system into each road wheel, as well as reducing the weight and fuel efficiency of the entire automobile.

[0006] Accordingly, the present embodiments have been devised against the background described above, and can provide a wheel module and a vehicle equipped therewith that can secure precision, reliability, durability, etc. of a wheel module, and can drastically reduce the assembly process for assembling a wheel module to a vehicle.

[0007] In addition, the problems to be solved by the embodiments of the present invention are not limited thereto, and other problems not mentioned will be clearly understood by those skilled in the art from the description below.

[0008] According to the present embodiments, a wheel module may be provided, which includes a knuckle rotatably coupled to a lower arm coupled to a body of a vehicle to steer a road wheel, a steering link having a lower end coupled to an upper end of the knuckle, a steering system having one end fixed to the body and coupled to an upper end of the steering link to rotate the steering link to steer the road wheel, a suspension system having one end coupled to the knuckle and the other end coupled to the steering link, a wheel drive system installed inside the road wheel to provide rotational force to the road wheel, and a braking system installed inside the wheel drive system to adjust a rotational speed of the road wheel.

[0009] In addition, according to the present embodiments, a vehicle can be provided that includes a wheel module including an inner frame provided at an inner lower portion of a wheel housing space of a vehicle body, an upper frame provided at an upper portion of the wheel housing space, a first housing frame and a second housing frame connected to the inner frame and spaced apart from each other in the upper direction at an upper portion of the wheel housing space, a knuckle rotatably connected to a lower arm coupled to a vehicle body to steer a road wheel, a connecting link having a lower portion coupled to an upper portion of the knuckle, a steering system fixed to the vehicle body and coupled to an upper portion of the connecting link to steer the road wheel by rotating the connecting link, a suspension system having one end coupled to the knuckle and the other end coupled to the connecting link, a wheel drive system installed on the inner side of the road wheel to provide rotational force to the road wheel, and a braking system installed on the inner side of the wheel drive system to adjust a rotational speed of the road wheel.

[0010] As described above, according to the present embodiments, the precision, reliability, durability, etc. of the wheel module can be secured, and the assembly process for assembling the wheel module to the automobile can be drastically reduced.

[0011] Figure 1 is a perspective view showing a wheel module according to the present embodiments;

[0012] Figure 2 is an exploded perspective view showing a part of the wheel module according to the present embodiments;

[0013] Figure 3 is a perspective view showing some of the wheel modules according to the present embodiments;

[0014] Fig. 4 is a cross-sectional view showing some of the wheel modules according to the present embodiments;

[0015] Figures 5 to 8 are perspective views showing some of the wheel modules according to the present embodiments.

[0016] Fig. 9 is a cross-sectional view showing some of the wheel modules according to the present embodiments;

[0017] Fig. 10 is a perspective view showing a wheel module according to the present embodiments before being assembled into a vehicle.

[0018] Fig. 11 is a perspective view showing a wheel module according to the present embodiments assembled into a vehicle.

[0019] Hereinafter, some embodiments of the present disclosure will be described in detail with reference to exemplary drawings. When adding reference numerals to components in each drawing, identical components may have the same numerals as much as possible even if they are shown in different drawings. In addition, when describing the present embodiments, if it is determined that a detailed description of a related known configuration or function may obscure the gist of the present technical idea, the detailed description may be omitted. When "includes," "has," "consists of," etc. are used in this specification, other parts may be added unless "only" is used. When a component is expressed in the singular, it may include a plural unless there is a special explicit description.

[0020] Additionally, terms such as first, second, A, B, (a), (b), etc. may be used to describe components of the present disclosure. These terms are only intended to distinguish the components from other components, and the nature, order, sequence, or number of the components are not limited by the terms.

[0021] In a description of the positional relationship of components, when it is described that two or more components are "connected," "combined," or "connected," it should be understood that the two or more components may be directly "connected," "combined," or "connected," but that the two or more components may also be further "interposed" with another component to be "connected," "combined," or "connected." Here, the other component may be included in one or more of the two or more components that are "connected," "combined," or "connected" to each other.

[0022] In the description of the temporal flow relationship related to components, operation methods, or manufacturing methods, for example, when the temporal or flow relationship is described as “after”, “following”, “next to”, “before”, etc., it may also include cases where it is not continuous, unless “immediately” or “directly” is used.

[0023] Meanwhile, when numerical values ​​or corresponding information (e.g., levels, etc.) for components are mentioned, even without separate explicit description, the numerical values ​​or corresponding information may be interpreted as including an error range that may occur due to various factors (e.g., process factors, internal or external impact, noise, etc.).

[0024] FIG. 1 is a perspective view showing a wheel module according to the present embodiments, FIG. 2 is an exploded perspective view showing a part of the wheel module according to the present embodiments, FIG. 3 is a perspective view showing a part of the wheel module according to the present embodiments, FIG. 4 is a cross-sectional view showing a part of the wheel module according to the present embodiments, FIGS. 5 to 8 are perspective views showing a part of the wheel module according to the present embodiments, FIG. 9 is a cross-sectional view showing a part of the wheel module according to the present embodiments, FIG. 10 is a perspective view showing a wheel module according to the present embodiments before being assembled to a vehicle, and FIG. 11 is a perspective view showing a wheel module according to the present embodiments after being assembled to a vehicle.

[0025] As illustrated in these drawings, the wheel module (100) according to the present embodiments includes a knuckle (109) that is rotatably coupled to a lower arm (106) coupled to a body of a vehicle to steer a road wheel (104), a steering link (112) whose lower end is coupled to an upper end of the knuckle (109), a steering system (110) whose one end is fixed to the body and coupled to an upper end of the steering link (112) to rotate the steering link (112) to steer the road wheel (104), a suspension system (120) whose one end is coupled to the knuckle (109) and the other end is coupled to the steering link (112), a wheel drive system (130) that is installed on the inside of the road wheel (104) to provide rotational force to the road wheel (104), and a braking system (140) that is installed on the inside of the wheel drive system (130) to adjust the rotational speed of the road wheel (104).

[0026] First, referring to FIGS. 1 and 2, a wheel drive system (130) and a braking system (140) are installed on the inside of a road wheel (104), a tire (102) is coupled to the outside of the road wheel (104), a lower end of a knuckle (109) is rotatably supported by a lower arm (106), and an upper end of the knuckle (109) is coupled to a suspension system (120) and a steering system (110).

[0027] The lower arm (106) coupled to the body of the automobile is coupled to the knuckle (109), and the knuckle (109) coupled to the stator (135) via the mounting member (108) is rotatably coupled to the lower arm (106) at its lower end, and rotates by the steering link (112) when the steering drive unit (110a) is operated to steer the road wheel (104).

[0028] The knuckle (109) has a body portion (109a) having a mounting hole (104a) that is connected to a mounting member (108), an arm connecting portion (109d) that is extended from the lower side of the body portion (109a) and has a hinge hole (109d-1) through which a hinge shaft (106s) that is rotatably connected to the lower arm (106) passes, a suspension connecting portion (109b) that is extended upward from the upper side of the body portion (109a) and is connected to the suspension system (120) by a connecting portion (125a), and a link connecting portion (109c) that is extended horizontally from the upper side of the body portion (109a) and has a connecting hole (109c-1) that is connected to a steering link (112).

[0029] The steering drive unit (110a) is fixedly connected to the body of the vehicle and rotates the knuckle (109) via the steering link (112).

[0030] The upper part of the steering link (112) is connected to the steering drive unit (110a), and the lower part of the steering link (112) is connected to the knuckle (109) to transmit the steering rotational force of the steering drive unit (110a) to the knuckle (109).

[0031] A steering system (110) includes a steering drive unit (110a) including a steering actuator (101) driven by an electric signal, an electronic control unit (103) that controls the driving of the steering actuator (101), a drive unit housing (105) in which the steering actuator (101) and the electronic control unit (103) are built, and a housing fixing unit (107) that is provided at the lower end of the drive unit housing (105) and is fixed to a body (200) of an automobile by a fastening member (200a).

[0032] The housing fixing part (107) is formed in a flange shape that protrudes radially outward from the lower end of the drive housing (105) and is fixed to the body (200) of the automobile. The housing fixing part (107) may be formed integrally with the drive housing (105) or formed separately and coupled to the drive housing (105). In the present embodiments, the housing fixing part (107) is coupled to the drive housing (105) as an example.

[0033] At least two fastening holes (107a) spaced apart from each other in the circumferential direction are formed to penetrate upward and downward in the housing fixing portion (107) formed to protrude more radially than the driving housing (105).

[0034] The steering link (112) includes an upper link (111) coupled to the steering drive shaft (101a) of the steering actuator (101), a lower link (115) coupled to the upper portion of the knuckle (109), and a connecting link (113) connecting the upper link (111) and the lower link (115).

[0035] At one end of the upper link (111), an insertion hole (111-1) into which a steering drive shaft (101a) is coupled and a support groove (111-2) into which the lower end of the drive housing (105) is inserted are formed, and at the other end of the upper link (111), an upper connecting portion facing each other is provided so as to be rotatably connected to the upper end of the connecting link (113) by the upper hinge shaft (111a).

[0036] The lower part of the connecting link (113) is provided with lower connecting portions facing each other, and is connected to two lower links (115) by a first lower hinge axis (115a), and the lower link (115) is connected to a link connecting portion (109c) formed in the body portion (109a) of the knuckle (109) by a second lower hinge axis (115b).

[0037] The steering system (110) may further include a link rotation support member (160) that connects the steering drive shaft (101a) and the upper link (111) and supports the rotation of the upper link (111).

[0038] Here, the link rotation support member (160) may include a first rotation support member (161) that is coupled to the steering drive shaft (101a) and the upper link (111) to transmit the rotational force of the steering drive shaft (101a), and a second rotation support member (163) that is coupled to the outer circumference of the first rotation support member (161) and fixed to the housing fixing part (107) to support the rotation of the first rotation support member (161).

[0039] A steering drive shaft (101a) is coupled to the inside of the first rotation support member (161), and the lower part of the first rotation support member (161) is coupled to the upper link (111), so that when the steering drive shaft (101a) rotates, the upper link (111) is rotated to perform steering.

[0040] A spherical cloud member (167) is coupled between the outer surface of the first rotation support member (161) and the inner surface of the second rotation support member (163), and the cloud member (167) moves to support rotation when the first rotation support member (161) and the upper link (111) rotate.

[0041] A first fixing groove (161h) is formed on the outer surface of the first rotation support member (161) to support and secure the cloud member (167), and a second fixing groove (163h) is formed on the inner surface of the second rotation support member (163) to support and secure the cloud member (167).

[0042] The first settling groove (161h) and the second settling groove (163h) are formed as circular grooves facing each other, so that the cloud member (167) moves in the circular direction along the first settling groove (161h) and the second settling groove (163h).

[0043] In addition, the first settling groove (161h) and the second settling groove (163h) may be formed as a pair of one row or may be formed in two or more rows. In the present embodiments, an example of two rows being formed vertically is illustrated.

[0044] In addition, a protruding end (165) that protrudes downward and is coupled to an insertion hole (111-1) formed in the upper link (111) may be provided at the lower center of the first rotating support member (161), and an opening may be provided on the inside of the protruding end (165).

[0045] Accordingly, when the first rotation support member (161) is combined with the upper link (111), the protruding end (165) can be inserted into the insertion hole (111-1) and then combined with the fastening member (134), thereby enabling assembly at an accurate position.

[0046] And, the end of the steering drive shaft (101a) is positioned on the inside of the opening by penetrating the first rotation support member (161), and a screw portion is formed at the end, so that a fastening nut (166) is screwed onto the screw portion of the steering drive shaft (101a) and can be supported and fixed to the lower end of the first rotation support member (161).

[0047] In this way, the steering drive shaft (101a) is supported and connected to the lower end of the first rotation support member (161) by a fastening nut (166), thereby enabling the steering drive shaft (101a) and the first rotation support member (161) to be more firmly connected, and vibration and noise are prevented.

[0048] The upper part of the suspension system (120) is supported and connected to the upper link (111) and the lower part is connected to the knuckle (109), so that the suspension system (120) is supported by the steering link (112) and the knuckle (109) and absorbs the shock of the road surface transmitted through the tire (102) and the road wheel (104).

[0049] The suspension system (120) includes a damper (121) whose lower part is connected to a suspension connection part (109b) and whose upper part is connected to an upper link (111), and an elastic member (123) whose lower part is supported by a sheet part (121s) provided on the outer surface of the lower part of the damper (121) and whose upper part is supported by the upper link (111).

[0050] Here, the damper (121) has a structure in which a piston and a cylinder are inserted into each other so that they can expand and contract in the direction of the central axis. This is the same as a general damper structure, so a detailed description thereof will be omitted.

[0051] This suspension system (120) may further include a lower mounting member (125) that is connected to the suspension connection part (109b) by a fastening member (125a) to fix the lower part of the damper (121).

[0052] The lower mounting member (125) is formed in a shape that surrounds the damper (121) and is fixed to the suspension connection part (109b) of the knuckle (109) by a fastening member (125a), and connects the lower end of the damper (121) to the road wheel (104) through the knuckle (109), thereby absorbing the shock of the road surface transmitted through the road wheel (104).

[0053] In addition, the suspension system (120) may further include an upper mounting member (127) that is connected to the upper link (111) by a fastening member (127a) to fix the upper portion of the damper (121), and the upper mounting member (127) is fixed to the upper link (111) by the fastening member (127a).

[0054] A wheel drive system (130) installed inside a road wheel (104) and providing rotational force to the road wheel (104) includes a rotor (131) that is arranged inside the road wheel (104) and has a magnet (131a) provided on the inner surface thereof to rotate together with the road wheel (104) by a change in a magnetic field, and a stator (135) that is arranged inside the rotor (131) and has an electric coil (135a) provided on the outer surface thereof to rotate the rotor (131) by electric energy applied from an electronic control device (103).

[0055] This wheel drive system (130) has an external rotation motor structure in which the rotor (131) is arranged on the outside of the stator (135), and compared to an internal rotation motor structure of the same volume, the number and size of magnets (131a) can be increased, thereby increasing the rotational force. In addition, a braking system can be installed on the inside of the stator (135), thereby increasing space utilization.

[0056] The operating principle of the wheel drive system (130) is the same as that of a general external motor or in-wheel motor, so a detailed description thereof will be omitted.

[0057] A braking system (140) installed inside a wheel drive system (130) to adjust the rotational speed of a road wheel (104) may include a brake drum (143) that is arranged inside a stator (135) and rotates together with a rotor (131), a drum plate (141) on which a brake shoe (147) that rubs against the brake drum (143) during braking is installed, and a braking actuator (145) that is installed on the drum plate (141) to operate the movement of the brake shoe (147).

[0058] This braking system (140) has a drum-type brake structure, so it can be installed in the inner space of the stator (135) compared to a caliper-type brake, thereby increasing space utilization. However, since the operating principle is the same as that of a drum-type brake, a detailed description thereof will be omitted.

[0059] This wheel module (100) may further include a rotation connecting member (170) that connects the wheel drive system (130) and the braking system (140) and supports the rotation of the load wheel (104), the rotor (131), and the brake drum (143).

[0060] The rotary connecting member (170) includes a first rotary connecting member (171) that is coupled to the load wheel (104), the rotor (131), and the brake drum (143) to transmit the rotary force of the rotor (131), and a second rotary connecting member (173) that is fixed to a mounting member (108) coupled to the stator (135) and the knuckle (109) to support the rotation of the first rotary connecting member (171).

[0061] A spherical cloud member (175) is connected between the outer surface of the first rotating connecting member (171) and the inner surface of the second rotating connecting member (173).

[0062] A spherical cloud member (175) is coupled between the outer surface of the first rotation connecting member (171) and the inner surface of the second rotation connecting member (173), so that when the first rotation connecting member (171), the road wheel (104), the rotor (131), and the brake drum (143) rotate, the cloud member (175) moves and supports the rotation.

[0063] A first fixing groove (171a) is formed on the outer surface of the first rotating connecting member (171) to support and secure the cloud member (175), and a second fixing groove (173a) is formed on the inner surface of the second rotating connecting member (173) to support and secure the cloud member (175).

[0064] The first settling groove (171a) and the second settling groove (173a) are formed as circular grooves facing each other, so that the cloud member (167) moves in the circular direction along the first settling groove (171a) and the second settling groove (173a).

[0065] Meanwhile, referring to FIGS. 10 and 11 together with FIGS. 1 to 9, the automobile according to the present embodiments comprises an inner frame (201) provided at the inner lower portion of the wheel housing space of the automobile body (200), an upper frame (215) provided at the upper portion of the wheel housing space, a first housing frame (211) and a second housing frame (212) connected to the inner frame (201) and spaced apart from each other in the upper portion of the wheel housing space, a knuckle (109) rotatably coupled to a lower arm (106) coupled to the automobile body to steer a road wheel (104), a steering link (112) having a lower portion coupled to the upper portion of the knuckle (109), a steering system (110) fixed to the automobile body and coupled to the upper portion of the steering link (112) to rotate the steering link (112) to steer the road wheel (104), one end of which is It may include a wheel module (100) including a suspension system (120) coupled to a knuckle (109) and the other end coupled to a steering link (112), a wheel drive system (130) installed on the inside of a road wheel (104) to provide rotational force to the road wheel (104), and a braking system (140) installed on the inside of the wheel drive system (130) to adjust the rotational speed of the road wheel (104).

[0066] A steering system (110) may include a steering drive unit (110a) including a steering actuator (101) driven by an electric signal, an electronic control unit (103) that controls the driving of the steering actuator (101), a drive unit housing (105) in which the steering actuator (101) and the electronic control unit (103) are built, and a housing fixing unit (107) that is provided at the lower end of the drive unit housing (105) and is fixed to a body (200) of an automobile by a fastening member (200a).

[0067] Here, the steering system (110) including the steering actuator (101), electronic control device (103), drive housing (105), and housing fixing part (107) is the same as described above, so a detailed description thereof will be omitted.

[0068] A wheel housing space in which a wheel module (100) is mounted is arranged at a corner of the automobile body (200), and an inner frame (201) arranged in the front-rear direction of the automobile is provided at the inner lower part of the wheel housing space, to which a lower arm (106) is connected.

[0069] At the upper part of the wheel housing space, a first housing frame (211) and a second housing frame (212) are spaced apart in the direction of both sides of the vehicle, the lower part of which is connected to the inner frame (201), and an upper frame (215) is provided at the upper part of the wheel housing space, connecting the first housing frame (211) and the second housing frame (212), and a steering drive unit (110a) is coupled thereto.

[0070] The upper frame (215) is provided with a cut hole (215a) through which the drive housing (105) passes, so that the drive housing (105) is placed on the upper side of the upper frame (215), and the housing fixing part (107) is supported on the lower side of the upper frame (215) and fixed by being joined with a fastening member (200a).

[0071] Accordingly, when assembling a wheel module (100) to a vehicle, the wheel module (100) is placed in the wheel housing space, the upper frame (215) and the housing fixing part (107) are fastened from the upper side with a fastening member (200a), and the inner frame (201) and the lower arm (106) are fastened from the lower side, thereby completing the assembly process and drastically reducing the assembly time.

[0072] One end of the lower arm (106) is provided with a first support member (152) that is arranged in the front-rear direction of the vehicle and is coupled to the inner frame (201), and a second support member (156) that is arranged in the up-down direction of the vehicle and is coupled to the inner frame (201).

[0073] One end of the lower arm (106) is formed by branching into two fixed parts (106a, 106b), and each fixed part is provided with a first support member (152) and a second support member (156), and the first support member (152) and the second support member (156) are arranged in the front-rear direction and the up-down direction of the vehicle and are provided perpendicular to each other.

[0074] Among the two fixing parts formed at one end of the lower arm (106), the first fixing part (106a) is provided with a first fixing hole penetrating in the front-rear direction of the vehicle, and the first support member (152) is coupled to the first fixing hole.

[0075] Here, the first support member (152) includes a first elastic member (151) inserted into the first fixing hole and a first support shaft (153) inserted into the center hole of the first elastic member (151) and coupled to the inner frame (201).

[0076] The remaining second fixing part (106b) of the lower arm (106) is provided with a second fixing hole that penetrates the upper and lower direction of the vehicle, and the second support member (156) is coupled to the second fixing hole.

[0077] The second support member (156) includes a second elastic member (157) inserted into the second fixing hole and a second support shaft (155) inserted into the center hole of the second elastic member (157) and coupled to the inner frame (201).

[0078] Additionally, the inner frame (201) of the automobile body (200) may be provided with a first frame bracket (223) to which a first support member (152) is coupled and a second frame bracket (225) to which a second support member (156) is coupled.

[0079] A first support hole (223a) is formed in the front-rear direction of the vehicle in the first frame bracket (223), and a first support shaft (153) is coupled thereto, thereby enabling the lower arm (106) to rotate around the first support shaft (153) as its central axis.

[0080] In addition, a second support hole (225a) is formed in the upper and lower direction of the vehicle in the second frame bracket (225), and a second support shaft (155) is coupled thereto, thereby enabling the lower arm (106) to rotate with the second support shaft (155) as its central axis.

[0081] Accordingly, even if an impact load in an irregular direction is transmitted through the wheel module (100) while the vehicle is driving, the wheel module (100) can be prevented from being deformed or damaged by absorbing the impact load within a certain range, thereby increasing durability.

[0082] As described above, according to the present embodiments, the precision, reliability, durability, etc. of the wheel module can be secured, and the assembly process for assembling the wheel module to the automobile can be drastically reduced.

[0083] The above description is merely an example of the technical idea of ​​the present disclosure, and those skilled in the art to which the present disclosure pertains will appreciate that various modifications and variations can be made without departing from the essential characteristics of the technical idea of ​​the present disclosure. In addition, the present embodiments are not intended to limit the technical idea of ​​the present disclosure but rather to explain it, and therefore the scope of the technical idea of ​​the present disclosure is not limited by these embodiments. The scope of protection of the present disclosure should be interpreted by the claims below, and all technical ideas within a scope equivalent thereto should be interpreted as being included in the scope of rights of the present disclosure.

[0084]

[0085] CROSS-REFERENCE TO RELATED APPLICATION

[0086] This patent application claims priority under 35 USC § 119(a) to Korean Patent Application No. 10-2023-0114852, filed August 30, 2023, the entire contents of which are incorporated herein by reference. Furthermore, this patent application claims priority in countries other than the United States for the same reasons, the entire contents of which are incorporated herein by reference.

Claims

1. A knuckle that is rotatably connected to a lower arm that is connected to the body of an automobile and steers the road wheel; A steering link having a lower portion joined to an upper portion of the knuckle; A steering system having one side fixed to the body and coupled to the upper end of the steering link to rotate the steering link to steer the road wheel; A suspension system having one end connected to the knuckle and the other end connected to the steering link; A wheel drive system installed on the inside of the above-mentioned road wheel and providing rotational force to the above-mentioned road wheel; A braking system installed inside the wheel drive system to adjust the rotation speed of the road wheel; Wheel module including.

2. In paragraph 1, The above knuckles, A body part with a support hole in the center; An arm joint having a hinge hole through which a hinge shaft extending from the lower side of the body portion and rotatably coupled to the lower arm passes; A suspension connection extending upward from the upper side of the above body part and coupled with the suspension system; A link connecting portion extending horizontally from the upper side of the above body portion and connected to the steering link; Wheel module including.

3. In paragraph 2, The above steering system, A steering drive unit including a steering actuator driven by an electric signal, an electronic control unit that controls the driving of the steering actuator, and a drive unit housing in which the steering actuator and the electronic control unit are built; A housing fixing part provided at the lower end of the above driving unit housing and fixed to the vehicle body by a fastening member; Wheel module including.

4. In paragraph 3, The above steering link, An upper link coupled to the steering drive shaft of the above steering actuator; A lower link coupled to the upper portion of the above knuckle; A connecting link connecting the upper link and the lower link; Wheel module including.

5. In paragraph 4, The above steering system, A wheel module further comprising a link rotation support member that connects the steering drive shaft and the upper link and supports rotation of the upper link.

6. In paragraph 5, The above link rotation support member is, A first rotation support member coupled to the steering drive shaft and the upper link to transmit the rotational force of the steering drive shaft; A second rotation support member fixed to the housing fixing portion and supporting the rotation of the first rotation support member; Wheel module including.

7. In paragraph 6, A wheel module characterized in that a spherical cloud member is coupled between the outer surface of the first rotation support member and the inner surface of the second rotation support member.

8. In paragraph 4, The above suspension system is, A damper having a lower part coupled to the suspension connection and an upper part coupled to the upper link; An elastic member whose lower part is supported by a sheet provided on the outer surface of the lower part of the damper and whose upper part is supported by the upper link; Wheel module including.

9. In paragraph 8, The above suspension system is, A wheel module further comprising a lower mounting member that is connected to the above suspension connection member as a fastening member and fixes the lower portion of the damper.

10. In paragraph 9, The above suspension system is, A wheel module further comprising an upper mounting member that is connected to the upper link as a fastening member to fix the upper portion of the damper.

11. In paragraph 1, The above wheel drive system, A rotor disposed on the inside of the above-mentioned road wheel and having a magnet on the inner surface thereof to rotate together with the road wheel by changes in the magnetic field; A stator arranged on the inside of the rotor and having an electric coil on the outer surface thereof to rotate the rotor by applied electric energy; Wheel module including.

12. In paragraph 11, The above braking system, A brake drum disposed inside the stator and rotating together with the rotor; A drum plate on which a brake shoe that rubs against the brake drum during braking is installed; A brake actuator installed on the drum plate to operate the movement of the brake shoe; Wheel module including.

13. In paragraph 12, A wheel module that connects the wheel drive system and the braking system and further includes a rotation connecting member that supports the rotation of the road wheel, the rotor, and the brake drum.

14. In paragraph 13, The above rotating connecting member is, A first rotary connecting member coupled to the above-mentioned road wheel, rotor, and brake drum to transmit the rotational force of the rotor; A second rotating connecting member fixed to a mounting member coupled to the stator and knuckle to support rotation of the first rotating connecting member; Wheel module including.

15. In paragraph 14, A wheel module characterized in that a spherical cloud member is coupled between the outer surface of the first rotating connecting member and the inner surface of the second rotating connecting member.

16. An inner frame provided on the inner lower part of the wheel housing space of an automobile body; An upper frame connected to the inner frame and spaced apart in both directions at the upper end of the wheel housing space, and provided at the upper end of the wheel housing space, and connecting the first housing frame and the second housing frame; A wheel module including a knuckle rotatably connected to a lower arm connected to the body to steer a road wheel, a steering link having a lower end connected to an upper end of the knuckle, a steering system fixed to the body and connected to an upper end of the steering link to rotate the steering link to steer the road wheel, a suspension system having one end connected to the knuckle and the other end connected to the steering link, a wheel drive system installed inside the road wheel to provide rotational force to the road wheel, and a braking system installed inside the wheel drive system to adjust a rotational speed of the road wheel; A car containing .

17. In paragraph 16, The above steering system, A steering drive unit including a steering actuator driven by an electric signal, an electronic control unit that controls the driving of the steering actuator, and a drive unit housing in which the steering actuator and the electronic control unit are built; A housing fixing part provided at the lower end of the above driving unit housing and fixed to the vehicle body by a fastening member; A car containing .

18. In paragraph 16, An automobile characterized in that one end of the lower arm is provided with a first support member arranged in the front-rear direction of the automobile and coupled to the inner frame, and a second support member arranged in the upper-lower direction of the automobile and coupled to the inner frame.

19. In paragraph 18, An automobile in which one end of the lower arm is provided with a first fixing hole penetrating in the front-rear direction of the automobile, and the first support member includes a first elastic member inserted into the first fixing hole and a first support shaft inserted into the center hole of the first elastic member and coupled to the inner frame.

20. In paragraph 18, A vehicle in which one end of the lower arm is provided with a second fixing hole penetrating in the vertical direction of the vehicle, and the second support member includes a second elastic member inserted into the second fixing hole and a second support shaft inserted into the center hole of the second elastic member and coupled to the inner frame.

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