Steering column assembly and vehicle

Abstract

The utility model provides a steering column assembly and a vehicle, and the steering column assembly comprises a column shell which is provided with a bottom cover and is internally provided with a mounting cavity; at least part of the tubular column output shaft is located in the mounting cavity, and the tubular column output shaft deviates from the central axis of the tubular column shell; the limiting mechanism comprises a gear ring and a gear, the gear ring is installed on the tubular column shell in a rotatable mode and located in the installation cavity, the gear is fixed to the tubular column output shaft, and the gear is meshed with the gear ring; the damping piece is arranged between the gear ring and the bottom cover, and the damping piece is in contact with the gear ring; and the adjusting part is arranged on the bottom cover in a penetrating manner, so that one part of the adjusting part extends into the mounting cavity, and the length of the part, extending into the mounting cavity, of the adjusting part is adjustable. If the damping piece is abraded, the damping piece and the gear ring are kept in full contact through the pressing effect of the adjusting piece on the damping piece. Therefore, the original damping effect of the damping piece can be kept, and the damping piece does not need to be replaced.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and in particular to a steering column assembly and a vehicle having the same. Background Art

[0002] With the increasing intelligence and automation of vehicles, vehicle steering systems have gradually evolved from traditional mechanical systems to steer-by-wire systems. Compared to mechanical steering systems, steer-by-wire systems eliminate the mechanical connection between the steering wheel and the steering wheel, achieving steering through electrical energy and breaking free from the various limitations of traditional steering systems.

[0003] A related art steering column assembly for a steer-by-wire system includes a column housing and a column output shaft. A limiting mechanism, comprising a gear and a ring gear, is positioned between the end of the column output shaft and the column housing. A damping element is also positioned between the ring gear and the bottom cover of the column housing to increase friction during the ring gear's rotation, thereby increasing the mechanical limiting torque. However, over time, the damping element wears out, becoming thinner and unable to fully fill the space between the ring gear and the bottom cover, thus compromising the damping effect. Simply replacing the damping element would waste material, leading to increased vehicle operating costs. Utility Model Content

[0004] The present application provides a steering column assembly and a vehicle having the same, which aims to enable the damping member to maintain its damping effect even when the damping member is worn, thereby reducing the replacement frequency of the damping member and saving vehicle use costs.

[0005] The specific technical solutions are as follows:

[0006] In the first aspect, an embodiment of the present application provides a steering column assembly, which includes: a column housing, the column housing having a bottom cover, and an installation cavity is provided inside the column housing; a column output shaft, at least a portion of the column output shaft is located in the installation cavity, and the column output shaft deviates from the central axis of the column housing; a limiting mechanism, the limiting mechanism includes a ring gear and a gear, the ring gear is rotatably mounted on the column housing and is located in the installation cavity, the gear is fixed to the column output shaft, and the gear is meshed with the ring gear; a damping member, the damping member is arranged between the ring gear and the bottom cover, and the damping member is in contact with the ring gear; an adjusting member, the adjusting member is passed through the bottom cover so that a portion of the adjusting member extends into the installation cavity, and the length of the portion of the adjusting member extending into the installation cavity is adjustable.

[0007] The steering column assembly in the embodiment of the present application is provided with an adjusting member, which is inserted into the bottom cover so that a portion of the adjusting member extends into the mounting cavity of the column housing, and the length of the portion of the adjusting member extending into the mounting cavity is adjustable. During long-term use of the steering column assembly, if the damping member wears out and the damping member cannot be fully filled between the ring gear and the bottom cover, the adjusting member can be adjusted to increase the length of the portion of the adjusting member extending into the mounting cavity, thereby tightly contacting the adjusting member and the damping member. Thus, the damping member and the ring gear are kept in full contact by the pressing action of the adjusting member on the damping member. In this way, the damping member can maintain its original damping effect, and there is no need to replace the damping member. In this way, the replacement frequency of the damping member can be reduced, which helps to save vehicle use costs.

[0008] In some embodiments, the damping member is an elastic gasket.

[0009] In some embodiments, the adjusting member is an adjusting bolt, the bottom cover is provided with a threaded hole, and the adjusting bolt cooperates with the threaded hole.

[0010] In some embodiments, the adjusting member is a telescopic cylinder having a main body and a telescopic rod connected to the main body, the main body is fixed to the bottom cover, and the telescopic rod is passed through the bottom cover and partially extends into the installation cavity.

[0011] In some embodiments, the telescopic rod is an electric cylinder, a pneumatic cylinder or a hydraulic cylinder.

[0012] In some embodiments, the number of the adjusting members is more than two, and the more than two adjusting members are spaced apart from each other.

[0013] In some embodiments, the number of the adjusting members is three, and the three adjusting members are evenly distributed along the circumference of the bottom cover.

[0014] In some embodiments, the column housing further includes a shell body, the bottom cover is connected to the shell body, and the shell body and the bottom cover jointly define the mounting cavity; the ring gear is provided with a first limiting portion, and the shell body is provided with a second limiting portion, and the first limiting portion and the second limiting portion are used to limit the rotation range of the ring gear relative to the shell body.

[0015] In some embodiments, the column housing further includes a shell body, the bottom cover is connected to the shell body, and the shell body and the bottom cover jointly define the installation cavity; the steering column assembly further includes a bearing, and the ring gear is connected to the shell body through the bearing.

[0016] In a second aspect, an embodiment of the present application provides a vehicle, comprising the steering column assembly of any of the above embodiments.

[0017] In the vehicle of the embodiment of the present application, the steering column assembly is provided with an adjusting member, which is inserted into the bottom cover so that a portion of the adjusting member extends into the mounting cavity of the column housing, and the length of the portion of the adjusting member extending into the mounting cavity is adjustable. During long-term use of the steering column assembly, if the damping member wears out and the damping member cannot be fully filled between the ring gear and the bottom cover, the adjusting member can be adjusted to increase the length of the portion of the adjusting member extending into the mounting cavity, thereby making the adjusting member and the damping member tightly abut against each other. Thus, the damping member and the ring gear are kept in full contact by the pressing action of the adjusting member on the damping member. In this way, the damping member can maintain its original damping effect, and there is no need to replace the damping member. In this way, the replacement frequency of the damping member can be reduced, which is conducive to saving vehicle use costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic structural diagram of a steering column assembly provided in one embodiment of the present application;

[0019] Figure 2 for Figure 1 Schematic cross-sectional view along the AA direction;

[0020] Figure 3 for Figure 1 a bottom-up schematic view of the structure shown;

[0021] Figure 4 A longitudinal cross-sectional schematic diagram of a steering column assembly provided in one embodiment of the present application;

[0022] Figure 5 This is a schematic diagram of an adjustment member provided in an embodiment of the present application installed on the bottom cover.

[0023] The description of the reference numerals in the figures is as follows:

[0024] 10. Steering column assembly;

[0025] 11. Column housing; 111. Bottom cover; 112. Housing body; 1121. Second limiting portion; 113. Mounting cavity;

[0026] 12. Column output shaft;

[0027] 13. Limiting mechanism; 131. Ring gear; 1311. First limiting portion; 132. Gear;

[0028] 14. Damping parts;

[0029] 15. Adjusting member; 151. Main body; 152. Telescopic rod;

[0030] 16. Bearings. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solutions and advantages of this application more clearly understood, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0032] In the description of this application, it should be understood that if the terms "up", "down", "left", "right", etc. indicate an orientation or position relationship based on the orientation or position relationship shown in the drawings, it is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as a limitation on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0033] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood to imply or suggest relative importance or implicitly indicate the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0034] In the description of this application, unless otherwise expressly specified or limited, terms such as "installed," "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components, unless otherwise expressly limited. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0035] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0036] With the increasing intelligence and automation of vehicles, vehicle steering systems have gradually evolved from traditional mechanical systems to steer-by-wire systems. Compared to mechanical steering systems, steer-by-wire systems eliminate the mechanical connection between the steering wheel and the steering wheel, achieving steering through electrical energy and breaking free from the various limitations of traditional steering systems.

[0037] A related art steering column assembly for a steer-by-wire system includes a column housing and a column output shaft. A limiting mechanism, comprising a gear and a ring gear, is positioned between the end of the column output shaft and the column housing. A damping element is also positioned between the ring gear and the bottom cover of the column housing to increase friction during the ring gear's rotation, thereby increasing the mechanical limiting torque. However, over time, the damping element wears out, becoming thinner and unable to fully fill the space between the ring gear and the bottom cover, thus compromising the damping effect. Simply replacing the damping element would waste material, leading to increased vehicle operating costs.

[0038] Based on the above situation, an embodiment of the first aspect of the present application provides a steering column assembly, which aims to enable the damping member to maintain the damping effect even when the damping member is worn, thereby reducing the replacement frequency of the damping member and saving vehicle use costs.

[0039] like Figure 1 、 Figure 2 、 Figure 3 as well as Figure 4 As shown, the steering column assembly 10 provided in an embodiment of the present application includes a column housing 11, a column output shaft 12, a limiting mechanism 13, a damping member 14, and an adjusting member 15. Specifically, the column housing 11 has a bottom cover 111, and a mounting cavity 113 is provided inside the column housing 11. At least a portion of the column output shaft 12 is located in the mounting cavity 113, and the column output shaft 12 deviates from the central axis of the column housing 11. The limiting mechanism 13 includes a ring gear 131 and a gear 132. The ring gear 131 is rotatably mounted on the column housing 11 and is located in the mounting cavity 113. The gear 132 is fixed to the column output shaft 12, and the gear 132 is meshed with the ring gear 131. The damping member 14 is disposed between the ring gear 131 and the bottom cover 111, and the damping member 14 is in contact with the ring gear 131. The adjusting member 15 is disposed through the bottom cover 111 so that a portion of the adjusting member 15 extends into the mounting cavity 113 . The length of the portion of the adjusting member 15 extending into the mounting cavity 113 is adjustable.

[0040] Specifically, the column output shaft 12 is a component that transmits the driver's steering force. Typically, the upper end of the column output shaft 12 is connected to the steering wheel. When the driver turns the steering wheel, the steering wheel drives the column output shaft 12 to rotate. The steer-by-wire system is also equipped with an angle sensor and a torque sensor to obtain the angle and torque of the column output shaft 12 in real time. The vehicle's ECU (electronic control unit) controls the steering actuator based on the angle signal to achieve vehicle steering. At the same time, the ECU also controls the hand-feel motor based on the angle signal and torque signal. The hand-feel motor is used to provide torque to the column output shaft 12 so that the driver can feel the changes in hand force caused by steering and road turbulence when operating the steering wheel.

[0041] The limiting mechanism 13 is used to limit the maximum rotation angle of the steering wheel. The limiting mechanism 13 includes a ring gear 131 and a gear 132. Gear 132 rotates along with the column output shaft 12. Since gear 132 meshes with ring gear 131, gear 132 drives ring gear 131 to rotate as it rotates. Because gear 132 is eccentric relative to ring gear 131, there is a speed difference between gear 132 and ring gear 131. Based on this, a limiting structure can be provided between ring gear 131 and the column housing 11 to limit the maximum rotation angle of ring gear 131 relative to the column housing 11. In this way, the maximum rotation angle of the steering wheel can be limited. When the electronic control module fails, the limiting mechanism 13 can be used to limit the maximum rotation angle of the steering wheel. This prevents the steering wheel from rotating indefinitely, thereby preventing the driver from panicking and reducing the risk of safety accidents.

[0042] The steering column assembly 10 in the embodiment of the present application is equipped with an adjustment member 15. The adjustment member 15 is inserted through the bottom cover 111 so that a portion of the adjustment member 15 extends into the mounting cavity 113 of the column housing 11. The length of the portion of the adjustment member 15 extending into the mounting cavity 113 is adjustable. During long-term use of the steering column assembly 10, if the damping member 14 wears out and is no longer fully seated between the ring gear 131 and the bottom cover 111, the adjustment member 15 can be adjusted to increase the length of the portion of the adjustment member 15 extending into the mounting cavity 113, thereby tightly contacting the damping member 14. The compression of the adjustment member 15 against the damping member 14 ensures full contact between the ring gear 131. This ensures that the damping member 14 maintains its original damping effect and eliminates the need for replacement. This reduces the frequency of damping member 14 replacement, thereby saving vehicle operating costs.

[0043] In some embodiments, the damping element 14 is an elastic washer. During assembly, the elastic washer can be pre-compressed to a certain degree. This allows the elastic washer to tightly contact the ring gear 131 and the bottom cover 111, thereby achieving a better damping effect. Furthermore, the elastic washer has a simple structure and is easy to install. Using an elastic washer as the damping element 14 also helps reduce the production cost of the steering column assembly 10.

[0044] In some of these embodiments, Figure 3 、 Figure 4 As shown, the adjusting member 15 is an adjusting bolt, and the bottom cover 111 is provided with a threaded hole, and the adjusting bolt matches the threaded hole.

[0045] In this embodiment, an adjusting bolt serves as the adjusting member 15. By rotating the adjusting bolt, the length of the portion of the adjusting bolt extending into the mounting cavity 113 can be adjusted. This allows the adjusting bolt to compress the damping element 14, ensuring sufficient contact between the damping element 14 and the ring gear 131. Furthermore, due to the low cost of adjusting bolts, using an adjusting bolt as the adjusting member 15 helps reduce the production cost of the steering column assembly 10.

[0046] In other embodiments, Figure 5 As shown, the adjusting member 15 is a telescopic cylinder having a main body 151 and a telescopic rod 152 connected to the main body 151 . The main body 151 is fixed to the bottom cover 111 , and the telescopic rod 152 is passed through the bottom cover 111 and partially extends into the installation cavity 113 .

[0047] In this embodiment, the telescopic cylinder is used as the adjusting member 15. When performing adjustment, the adjustment can be completed by simply increasing the length of the portion of the telescopic rod 152 extending from the main body 151. Therefore, using the telescopic cylinder as the adjusting member 15 has the advantages of convenient adjustment and reduced adjustment time.

[0048] Furthermore, the telescopic rod 152 can be an electric cylinder, a pneumatic cylinder or a hydraulic cylinder, etc. Among them, the electric cylinder is a telescopic cylinder using electricity as a power source, the pneumatic cylinder is a telescopic cylinder using high-pressure gas as a power source, and the hydraulic cylinder is a telescopic cylinder using high-pressure liquid as a power source.

[0049] In some of these embodiments, Figure 3 、 Figure 4 As shown, there are two or more adjusting members 15, and the two or more adjusting members 15 are spaced apart from each other. This arrangement helps improve the uniformity of force applied to the damping member 14 when the adjusting members 15 are used to compress the damping member 14, ensuring that the pressure between different parts of the damping member 14 and the ring gear 131 is roughly equal, thereby improving the damping effect. It also helps avoid stress concentration in the damping member 14, thereby increasing the service life of the damping member 14.

[0050] Further, if Figure 3 、 Figure 4 As shown, there are three adjusting members 15 , and the three adjusting members 15 are evenly distributed along the circumference of the bottom cover 111 .

[0051] When there are three adjusting members 15 , the angular interval between any two adjacent adjusting members 15 may be 120°, so that the three adjusting members 15 are evenly distributed along the circumference of the bottom cover 111 .

[0052] When there are three adjusting members 15, the force uniformity of the damping member 14 can be improved, so that the pressure between different parts of the damping member 14 and the ring gear 131 remains roughly the same. In addition, the number of adjusting members 15 is reduced to a minimum, thereby avoiding problems such as increased costs and a time-consuming assembly process.

[0053] In some of these embodiments, Figure 2 、 Figure 4 As shown, the column housing 11 further includes a housing body 112, a bottom cover 111 connected to the housing body 112, and the housing body 112 and the bottom cover 111 jointly define a mounting cavity 113. The ring gear 131 is provided with a first limiting portion, and the housing body 112 is provided with a second limiting portion 1121. The first limiting portion and the second limiting portion 1121 are used to limit the rotation range of the ring gear 131 relative to the housing body 112.

[0054] Because the steering wheel can rotate clockwise or counterclockwise, i.e., has two possible rotational directions, the column output shaft 12, gear 132, and ring gear 131 all have two possible rotational directions. The ring gear 131 is provided with a first limiting portion, and the housing body 112 is provided with a second limiting portion 1121. The first limiting portion and the second limiting portion 1121 cooperate to limit the rotational range (i.e., the maximum rotational angle) of the ring gear 131 relative to the housing body 112.

[0055] For example, when the ring gear 131 rotates clockwise and reaches its maximum rotation angle, the first stopper on the ring gear 131 abuts against the second stopper 1121 on the housing body 112, preventing the ring gear 131 from continuing to rotate clockwise. Similarly, when the ring gear 131 rotates counterclockwise and reaches its maximum rotation angle, the first stopper on the ring gear 131 abuts against the second stopper 1121 on the housing body 112, preventing the ring gear 131 from continuing to rotate counterclockwise.

[0056] Furthermore, the bottom cover 111 and the shell body 112 can be connected by screws, so that the bottom cover 111 is detachable relative to the shell body 112. In this way, it is convenient to disassemble the bottom cover 111 at a later stage to inspect and repair the components in the installation cavity 113.

[0057] In one embodiment, the number of the first limiting portions and the number of the second limiting portions 1121 are both one. In this case, the second limiting portion 1121 can be set to be larger so that the second limiting portion 1121 can cover a certain angle range along the circumference of the shell body 112.

[0058] In this arrangement, when the ring gear 131 rotates to the maximum rotation angle in the clockwise direction, the first limiting portion abuts against one end of the second limiting portion 1121, so that the ring gear 131 cannot continue to rotate in the clockwise direction; when the ring gear 131 rotates to the maximum rotation angle in the counterclockwise direction, the first limiting portion abuts against the other end of the second limiting portion 1121, so that the ring gear 131 cannot continue to rotate in the counterclockwise direction.

[0059] In another embodiment, the number of the first limiting portion is one, the number of the second limiting portions 1121 is two, and the two second limiting portions 1121 are arranged at intervals along the circumference of the shell body 112 .

[0060] In this arrangement, when the ring gear 131 rotates to the maximum rotation angle in the clockwise direction, the first limiting portion abuts against one of the second limiting portions 1121, so that the ring gear 131 cannot continue to rotate in the clockwise direction; when the ring gear 131 rotates to the maximum rotation angle in the counterclockwise direction, the first limiting portion abuts against the other second limiting portion 1121, so that the ring gear 131 cannot continue to rotate in the counterclockwise direction.

[0061] In another embodiment, the number of the first limiting portions is two, the two first limiting portions are spaced apart along the circumference of the ring gear 131 , and the number of the second limiting portion 1121 is one.

[0062] In this arrangement, when the ring gear 131 rotates to the maximum rotation angle in the clockwise direction, one of the first limiting portions abuts against the second limiting portion 1121, so that the ring gear 131 cannot continue to rotate in the clockwise direction; when the ring gear 131 rotates to the maximum rotation angle in the counterclockwise direction, the other first limiting portion abuts against the second limiting portion 1121, so that the ring gear 131 cannot continue to rotate in the counterclockwise direction.

[0063] In some of these embodiments, Figure 2 、 Figure 4As shown, the column housing 11 further includes a housing body 112, a bottom cover 111 connected to the housing body 112, and the housing body 112 and the bottom cover 111 together define a mounting cavity 113. The steering column assembly 10 further includes a bearing 16, and the ring gear 131 is connected to the housing body 112 via the bearing 16.

[0064] The steering column is also provided with a bearing 16. The ring gear 131 is connected to the inner ring of the bearing, and the outer ring of the bearing is connected to the shell body 112 of the column housing 11. As a result, the ring gear 131 can rotate relative to the column housing 11. In addition, the connection between the ring gear 131 and the column housing 11 via the bearing 16 also helps to improve the smoothness of the ring gear 131 during rotation.

[0065] Specifically, the bearing 16 includes a bearing outer ring (not shown) and a bearing inner ring (not shown), the bearing inner ring being rotatably connected to the bearing outer ring, the gear ring 131 being connected to the bearing inner ring, and the bearing outer ring being connected to the housing body 112. Thus, the gear ring 131 is connected to the housing body 112 via the bearing 16.

[0066] An embodiment of the second aspect of the present application provides a vehicle, which includes the steering column assembly 10 according to any embodiment of the first aspect.

[0067] In the vehicle of the embodiment of the present application, the steering column assembly 10 is provided with an adjustment member 15. The adjustment member 15 is inserted through the bottom cover 111 so that a portion of the adjustment member 15 extends into the mounting cavity 113 of the column housing 11. The length of the portion of the adjustment member 15 extending into the mounting cavity 113 is adjustable. During long-term use of the steering column assembly 10, if the damping member 14 wears out and is no longer fully seated between the ring gear 131 and the bottom cover 111, the adjustment member 15 can be adjusted to increase the length of the portion of the adjustment member 15 extending into the mounting cavity 113, thereby tightly contacting the damping member 14. The compression of the adjustment member 15 against the damping member 14 ensures full contact between the ring gear 131. This ensures that the damping member 14 maintains its original damping effect and eliminates the need for replacement. This reduces the frequency of replacement of the damping member 14, thereby saving vehicle operating costs.

[0068] The above content is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A steering column assembly, characterized in that: include: A column housing, wherein the column housing has a bottom cover and an installation cavity is provided inside the column housing; a tubular column output shaft, at least a portion of the tubular column output shaft being located within the mounting cavity, the tubular column output shaft being offset from a central axis of the tubular column housing; a limiting mechanism, the limiting mechanism comprising a ring gear and a gear, the ring gear being rotatably mounted on the column housing and located in the mounting cavity, the gear being fixed to the column output shaft, the gear being meshed with the ring gear; a damping member, the damping member being disposed between the gear ring and the bottom cover, the damping member being in contact with the gear ring; An adjusting member is provided through the bottom cover so that a portion of the adjusting member extends into the installation cavity, and the length of the portion of the adjusting member extending into the installation cavity is adjustable.

2. The steering column assembly according to claim 1, characterized in that: The damping element is an elastic gasket.

3. The steering column assembly according to claim 1, characterized in that: The adjusting member is an adjusting bolt, the bottom cover is provided with a threaded hole, and the adjusting bolt matches the threaded hole.

4. The steering column assembly according to claim 1, characterized in that: The adjusting member is a telescopic cylinder having a main body and a telescopic rod connected to the main body. The main body is fixed to the bottom cover. The telescopic rod passes through the bottom cover and partially extends into the installation cavity.

5. The steering column assembly according to claim 4, characterized in that: The telescopic rod is an electric cylinder, a pneumatic cylinder or a hydraulic cylinder.

6. The steering column assembly according to claim 1, characterized in that: The number of the adjusting members is more than two, and the more than two adjusting members are arranged at intervals from each other.

7. The steering column assembly according to claim 6, characterized in that: The number of the adjusting members is three, and the three adjusting members are evenly distributed along the circumference of the bottom cover.

8. The steering column assembly according to claim 1, characterized in that: The column housing also includes a shell body, the bottom cover is connected to the shell body, and the shell body and the bottom cover jointly define the installation cavity; the ring gear is provided with a first limiting portion, and the shell body is provided with a second limiting portion, and the first limiting portion and the second limiting portion are used to limit the rotation range of the ring gear relative to the shell body.

9. The steering column assembly according to claim 1, characterized in that: The column housing further includes a housing body, the bottom cover is connected to the housing body, and the housing body and the bottom cover together define the installation cavity; The steering column assembly further includes a bearing, and the ring gear is connected to the housing body via the bearing.

10. A vehicle, characterized in that: A steering column assembly comprising any one of claims 1 to 9.

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