CN117163144A - Electric adjustment steering column - Google Patents

Abstract

The invention discloses an electric adjustment steering column, and belongs to the technical field of automobile manufacturing. An electric adjustment steering column comprises an upper column assembly and a lower column assembly sleeved on the outer surface of the upper column assembly; according to the invention, the front-rear adjusting mechanism consisting of the first control part, the first threaded rod, the first threaded sleeve and the moving frame, the upper-lower adjusting mechanism consisting of the second control part, the second threaded rod and the second threaded sleeve are respectively designed on the lower surface of the lower tubular column shell from left to right, so that the designed front-rear adjusting mechanism can be matched with the upper tubular column assembly to axially and telescopically slide along the inside of the lower tubular column assembly, the automatic adjustment of the axial position of the steering wheel and the designed upper-lower adjusting mechanism are realized, the upper tubular column shell sleeved inside the lower tubular column shell drives the steering wheel connected with the upper transmission shaft to perform the upper-lower adjustment of the inclination direction, and the problems of great difficulty and inconvenience in manual adjustment of the steering wheel position of the traditional steering column are effectively replaced.

Description

Electric adjustment steering column

Technical Field

The invention relates to the technical field of automobile manufacturing, in particular to an electric adjustment steering column.

Background

With the development of electric and intelligent in the automobile industry, intelligent driving and intelligent cabins become core technologies for the general and vigorous development of large-vehicle enterprises in the next few years. The steering column is used as an important part of the intelligent cabin, is arranged in the cabin, and is connected with a steering wheel of the cabin and a steering machine of the engine cabin, and steering control moment of a driver is transmitted to steering wheels through the steering column and the steering machine so as to realize steering of an automobile. The basic function of a steering column, in addition to transmitting driver intent, is the additional necessary function of adjusting the position of the steering wheel within the cabin so that the position of the steering wheel can be adapted to different drivers.

At present, the steering columns commonly used are mainly divided into two types, namely a mechanical steering column and a steering column with electric steering assistance, wherein the two types of steering columns are generally divided into an upper pipe column body and a lower pipe column body, the mechanical steering columns are mainly adjusted in a manual mode, an adjusting locking device designed on the steering column is usually opened through an adjusting handle, then the steering handle is pulled to drive the upper pipe column body to realize telescopic or inclined direction adjustment along the direction of a preset adjusting chute on the surface of the lower pipe column body, after the steering handle is adjusted to an ideal position, the adjusting locking device designed on the surface of the lower pipe column body is controlled by the adjusting handle to lock the upper pipe column body and the lower pipe column body, so that the position of the steering wheel is kept at the ideal position after adjustment, and for some electric steering columns with bidirectional adjustment, the position of the steering wheel is adjusted in an electric mode, but the electric steering column with the bidirectional adjustment can only adjust the two directions of the steering wheel, for example, the vertical distance of the steering wheel is adjusted, and the requirements of different drivers on the steering wheel and the space up and down space of the driver are met.

The manual adjustment mode is adopted for the existing mechanical steering column, the adjustment handle is loosened by one hand, then the steering wheel is pulled by the other hand with force again, the position of the steering wheel is adjusted, when the hand force is small, the axial telescopic movement is difficult to be carried out along the inner part of the lower column by the upper column, the adjustment on the axial position is carried out by matching with the square disk, meanwhile, if the hand force is too large, the adjustment clamping device for controlling the upper column and the lower column can be damaged, the maintenance cost is further increased, and therefore the position of the steering wheel is adjusted manually by the existing steering column, and the adjustment is extremely complicated and inconvenient.

To this end, the present invention provides an electrically adjustable steering column to solve the above-described problems.

Disclosure of Invention

The invention aims to solve the problems that the prior steering column adopts manual adjustment of the position of a steering wheel in the prior art, is extremely tedious and inconvenient, and provides an electric adjustment steering column.

In order to achieve the above purpose, the present invention adopts the following technical scheme:

the utility model provides an electric control steering column, includes tubular column subassembly and cover and establishes the lower tubular column subassembly on last tubular column subassembly surface, the lower surface of tubular column subassembly from left to right is equipped with fore-and-aft adjustment mechanism and upper and lower adjustment mechanism in proper order, one side of tubular column subassembly is equipped with and is used for the cooperation fore-and-aft adjustment mechanism to drive the regulation spout that the tubular column subassembly was linear reciprocating motion along tubular column subassembly axis down, the rear end surface of tubular column subassembly rides and is equipped with the back linking bridge of concave form down, the inside wall of back linking bridge corresponds the one side of tubular column subassembly down and is connected with the regulating plate of gradually downwarping through the pivot, the surface of regulating plate is connected on the corresponding surface of tubular column subassembly down through the pivot, two the bottom fixedly connected with of one of regulating plate is the connecting piece of Z shape structure, the surface of connecting piece is connected with the corresponding upper and lower adjustment mechanism of looks adaptation through the screw connection, be used for connecting between the corresponding surface of connecting piece and the connecting piece down between the corresponding surface of connecting piece to the relative rotation of connecting the support of connecting between the tubular column subassembly and the lower tubular column subassembly of cooperation upper and lower adjustment mechanism drive regulating plate and the lower tubular column subassembly and the inside cover.

Preferably, the upper pipe column assembly comprises an upper pipe column shell and an upper transmission shaft which are hollow and are of cylindrical structures, the surface of the upper transmission shaft is integrated with the rear end of the upper pipe column shell through a bearing in a press fit mode, the lower pipe column assembly comprises a lower pipe column shell and a lower transmission shaft which are hollow and are of cylindrical structures, the lower pipe column shell is sleeved on the outer surface of the front end of the upper pipe column shell, the surface of the lower transmission shaft is integrated with the front end of the lower pipe column shell through a bearing in a press fit mode, and a spline groove preset in the front end of the upper transmission shaft is connected with a spline corresponding to the rear end of the lower transmission shaft in a mutually sliding mode.

Preferably, the inner cavity of the upper tubular column shell is hollow and cylindrical, and the outer surface of the upper tubular column shell is in fit contact with the inner wall of the lower tubular column shell.

Preferably, the front end of the lower pipe column shell is connected with a front connecting bracket which is matched with the front end of the lower pipe column shell, and the adjusting plates are respectively connected to the corresponding surfaces of the lower pipe column shell and the rear connecting bracket through connecting shafts.

Preferably, the upper pipe column shell and the front connecting support are made of iron, and the lower pipe column shell and the rear connecting support are made of aluminum.

Preferably, the rear connecting support and the front connecting support are of concave structures, the first connecting lugs with mounting holes are arranged on two sides of the rear connecting support, and the second connecting lugs with mounting holes are arranged on two sides of the front connecting support.

Preferably, the rear end of the upper transmission shaft is provided with an external spline for being matched with a steering wheel and connected through a nut.

Preferably, the front-back adjusting mechanism comprises a first control part arranged below the lower surface of the lower tubular column casing, a first threaded rod connected with the output end of the first control part, and a first threaded sleeve in threaded connection with the surface of the first threaded rod, wherein the surface of the first threaded sleeve is connected with a movable frame positioned on the inner wall of the adjusting chute in a clamping manner, the movable frame extends inside the lower tubular column casing through the adjusting chute, and is connected with the corresponding surface of the upper tubular column casing sleeved inside the lower tubular column casing.

Preferably, the upper and lower adjustment mechanism comprises a second control part connected to the lower surface mounting seat of the lower tubular column casing, the second control part is connected to the corresponding surface on one side of the lower tubular column casing through an extension edge with a convex surface, the output end of the second control part is connected with a second threaded rod positioned in the inclination direction of the lower surface of the lower tubular column casing, the surface of the second threaded rod is in threaded connection with a second thread bush matched with the surface of the second threaded rod, and the surface of the second thread bush is connected between the corresponding surfaces of the first connecting piece and the second connecting piece.

Preferably, the first control part and the second control part are servo motors and are electrically connected with a switch preset on the surface of the steering wheel in the automobile through wires respectively.

Compared with the prior art, the invention provides an electric adjustment steering column, which has the following beneficial effects:

this electric control steering column, through a control portion, a threaded rod, the front and back adjustment mechanism that thread bush and removal frame are constituteed and the upper and lower adjustment mechanism that No. two control portion, no. two threaded rods and No. two thread bush are constituteed, design from left to right at the lower surface of tubular column casing down respectively, guarantee that the front and back adjustment mechanism of design can cooperate tubular column subassembly to do axial telescopic slip along the inside of tubular column subassembly down, realize the automatic adjustment of steering wheel axial position and the upper and lower adjustment mechanism of design, the upper and lower adjustment of steering wheel that the upper column casing that realizes the inside cover of tubular column casing was established drives upper transmission shaft connection carries out tilting direction's upper and lower adjustment, and effectively replaced the manual adjustment steering wheel position degree of difficulty of traditional steering column and inconvenient problem, compare some two-way adjustment's electric steering column simultaneously, not only support the use characteristics of steering wheel position axial adjustment length apart from the upper and lower adjustment to the steering wheel position.

Drawings

FIG. 1 is a schematic view of an overall structure of an electrically adjustable steering column according to the present invention;

FIG. 2 is a side view of an electrically adjustable steering column in accordance with the present invention;

FIG. 3 is a schematic diagram of a connection structure between an upper column assembly and a lower column assembly of an electrically adjustable steering column according to the present invention;

FIG. 4 is an exploded view of an upper column assembly and a lower column assembly of an electrically adjustable steering column according to the present invention;

FIG. 5 is a schematic diagram of a connection structure between an upper drive shaft and a lower drive shaft of an electric steering column according to the present invention;

fig. 6 is an exploded view of an adjusting plate and a rear connecting bracket of an electric steering column according to the present invention.

In the figure: 1. an upper tubular column assembly; 101. an upper column casing; 102. an upper transmission shaft; 2. a lower tubular column assembly; 201. a lower tubular column housing; 202. a lower transmission shaft; 3. a front-rear adjusting mechanism; 301. a first control unit; 302. a first threaded rod; 303. a first thread bush; 304. a moving rack; 4. an up-down adjusting mechanism; 401. a second control unit; 402. a second threaded rod; 403. a second thread bush; 5. adjusting the chute; 6. a rear connecting bracket; 7. an adjusting plate; 8. a first connecting piece; 9. a second connecting piece; 10. and a front connecting bracket.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments.

In the description of the present invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present invention and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.

Examples

Referring to fig. 1-6, an electric steering column comprises an upper column component 1 and a lower column component 2 sleeved on the outer surface of the upper column component 1, a front and rear adjusting mechanism 3 and an upper and lower adjusting mechanism 4 are sequentially arranged on the lower surface of the lower column component 2 from left to right, an adjusting chute 5 used for being matched with the front and rear adjusting mechanism 3 to drive the upper column component 1 to do linear reciprocating motion along the axis of the lower column component 2 is arranged on one side of the lower column component 2, a concave rear connecting bracket 6 is ridden on the rear end surface of the lower column component 2, an adjusting plate 7 which is gradually bent downwards is connected to one side of the rear connecting bracket 6 corresponding to the lower column component 2 through a rotating shaft, the surface of the adjusting plate 7 is connected to the corresponding surface of the lower column component 2 through the rotating shaft, a first connecting piece 8 which is in a Z-shaped structure is fixedly connected to the bottom of one of the two adjusting plates 7, a second connecting piece 9 which is matched with the surface of the first connecting piece 8 through a screw connection, a corresponding upper and lower adjusting mechanism 4 is used for being connected between the corresponding surfaces of the first connecting piece 8 and the second connecting piece 9, and the corresponding surfaces of the second connecting piece 9 are matched with the upper and lower adjusting mechanism 4, and the lower adjusting plate 7 is driven by the rotating shaft and the lower adjusting mechanism 4 is connected with the lower column component 2 through the rotating shaft 6 corresponding to the rotating shaft 6.

In the invention, based on the problem that the position of a steering wheel is usually or manually adjusted for some traditional steering columns, the difficulty is high and the adjustment is inconvenient, so in the adjusting and clamping device adopted by the traditional matched steering column in the embodiment, the front and rear adjusting mechanism 3 and the upper and lower adjusting mechanism 4 are respectively designed on the lower surface of the lower column shell 201 in the steering column formed by the upper column component 1 and the lower column component 2 to effectively replace the lower surface of the lower column shell, the main purpose is to ensure that the steering column can conveniently control the front and rear adjusting mechanism 3 and the upper and lower adjusting mechanism 4 which are electrically connected with the steering wheel surface switch button to work respectively through a switch button designed on the steering wheel surface, and the axial distance adjustment of the distance between the steering wheel and a driver and the vertical distance adjustment of the steering wheel in the inclined direction are automatically realized, so that the problem that the difficulty of the position of the traditional steering column is high and the inconvenience is solved;

and the upper pipe column component 1, the lower pipe column component 2, the front-back adjusting mechanism 3 and the upper-lower adjusting mechanism 4 designed in the implementation form a new steering pipe column, and compared with some existing steering pipe columns for automobiles with electric bidirectional adjusting design, the novel steering pipe column not only comprises the automatic adjustment of the vertical distance between the upper-lower direction positions of the steering wheel in the existing electric bidirectional adjusting steering pipe column, but also supports the characteristic of axially adjusting the axial center length of the steering wheel in the position of the steering wheel.

Examples

Referring to fig. 3-5, on the basis of embodiment 1, go up tubular column assembly 1 and include cavity and be the upper tubular column casing 101 and the upper transmission shaft 102 of cylinder structure, the surface of upper transmission shaft 102 passes through the bearing and becomes integrative with the rear end pressure equipment of upper tubular column casing 101, lower tubular column assembly 2 includes cavity and is cylinder structure's lower tubular column casing 201 and lower transmission shaft 202, lower tubular column casing 201 cover is established on the front end surface of upper tubular column casing 101, the surface of lower transmission shaft 202 passes through the bearing and becomes integrative with the front end pressure equipment of lower tubular column casing 201, upper transmission shaft 102 is located the inside spline that presets of front end and lower transmission shaft 202 are located the spline that the rear end corresponds, the inner chamber of upper tubular column casing 101 is hollow cylinder, the surface laminating contact of upper tubular column casing 101 is on the inner wall of lower tubular column casing 201, the front end of lower tubular column casing 201 is connected with the front linking bridge 10 of looks adaptation, regulating plate 7 passes through the connecting axle and connects respectively on lower tubular column casing 201 and the corresponding surface of rear linking bridge 6, upper tubular column casing 101 and front linking bridge 10 are the iron material, lower tubular column casing 201 and rear linking bridge 6 are the front end pressure equipment is integrative with the front end pressure equipment of lower tubular column casing 201, upper tubular column casing 201 is located the spline inside spline that presets and lower tubular column casing 202 is located the spline that the rear linking bridge 6 is located the rear end and spline that the spline is located the rear end and is equipped with the front end linking bridge 10, both sides, the both sides are equipped with the connecting hole through the front end and the connecting bridge 10 and the connecting plate is equipped with the connecting flange 10.

In the invention, the front end of the upper pipe column shell 101 is sleeved in the lower pipe column shell 201, and under the corresponding axial sliding insertion connection between the upper transmission shaft 102 and the lower transmission shaft 202, the upper pipe column assembly 1 and the lower pipe column assembly 2 can be pressed into an integrated steering pipe column, and simultaneously the upper pipe column assembly 1 can be matched with the lower pipe column assembly 2 to do axial telescopic reciprocating linear motion along the interior of the lower pipe column assembly 2, then the front connecting bracket 10 and the rear connecting bracket 6 respectively designed at the front end and the rear end of the surface of the lower pipe column shell 201 are fixedly arranged at the corresponding positions of steering wheels in an automobile, and the steering wheels are matched with the rear end of the upper transmission shaft 102 in the upper pipe column shell 101, so that the steering wheels can be stably adjusted in a reciprocating manner through the use of the front-rear adjusting mechanism 3 and the upper-lower adjusting mechanism 4 sequentially designed from the lower surface of the lower pipe column shell 201 from right, and the problem of great difficulty and inconvenience in manual adjustment of the position of the steering wheels can be automatically realized.

Examples

Referring to fig. 1-2, on the basis of embodiment 1, the front-rear adjusting mechanism 3 includes a first control portion 301 disposed below the lower surface of the lower column casing 201, a first threaded rod 302 connected to the output end of the first control portion 301, and a first threaded sleeve 303 screwed on the surface of the first threaded rod 302, wherein a moving frame 304 located on the inner wall of the adjusting chute 5 and clamped to the surface of the first threaded sleeve 303 is connected to the surface of the first threaded sleeve 303, and the moving frame 304 extends inside the lower column casing 201 through the adjusting chute 5 and is connected to the corresponding surface of the upper column casing 101 sleeved inside the lower column casing 201.

In the invention, the design of the front-back adjusting mechanism 3 is mainly to match with a steering column formed by an upper column component 1 and a lower column component 2, so that the axial telescopic adjustment of an automobile steering wheel can be automatically adjusted, and the adjustment requirements of the distances between the steering wheel and different drivers are met, when the front-back adjusting mechanism 3 is specifically used, a first thread sleeve 303 on the surface of a first threaded rod 302 can be driven to do axial linear reciprocating motion along the surface of the first threaded rod 302 in the working process of forward rotation or reverse rotation by adopting a first control part 301 of a servo motor, and a movable frame 304 can do reciprocating linear sliding along the inner wall of an adjusting chute 5 under the movement of the first thread sleeve 303, and the upper column casing 101 which is matched and connected drives an upper transmission shaft 102 designed inside to do reciprocating axial sliding along the inner wall of the lower column casing 201, so as to replace manual axial telescopic adjustment of the automobile steering wheel;

the connection position between the protruding extension edge of the surface of the first control portion 301 and the protruding mounting seat corresponding to the front end surface of the lower column casing 201 and the connection position between the first thread bush 303 and the surface of the movable frame 304 are assembled through the positioning pin with threads, so that the front-rear adjusting mechanism 3 can be guaranteed to be in a detachable position with the corresponding part of the lower column casing 201, and the front-rear adjusting mechanism 3 can be selected according to the types of different automobile steering columns to realize the axial telescopic adjustment of the steering column to the steering wheel position, so that the front-rear adjusting mechanism 3 designed in the embodiment is not limited to this, and the front-rear adjusting mechanism 3 can be changed and selected according to the types of different automobile steering columns.

Examples

Referring to fig. 1-2, on the basis of embodiment 1, the up-down adjusting mechanism 4 includes a No. two control part 401 connected to the lower surface mount of the lower column casing 201, the No. two control part 401 is connected to the corresponding surface of one side of the lower column casing 201 through an extended edge with a convex surface, the output end of the No. two control part 401 is connected with a No. two threaded rod 402 located in the inclined direction of the lower surface of the lower column casing 201, the surface of the No. two threaded rod 402 is in threaded connection with a No. two thread sleeve 403 which is adapted, and the surface of the No. two thread sleeve 403 is connected between the corresponding surfaces of the No. one connecting piece 8 and the No. two connecting pieces 9.

In the invention, for the design of the up-down adjusting mechanism 4, mainly in order to match the steering column composed of the upper column component 1 and the lower column component 2, the vertical distance of the steering wheel of the automobile can be automatically adjusted, namely, the steering wheel is positioned at the opposite up-down position of the driver, when the up-down adjusting mechanism 4 is specifically used, the up-down adjusting mechanism is characterized in that the up-column casing 101 sleeved in the lower column casing 201 drives the steering wheel connected with the upper transmission shaft 102 to adjust up-down in the tilting direction by adopting the second control part 401 of the servo motor in the working process of forward rotation or reverse rotation, the second thread sleeve 403 on the surface of the second threaded rod 402 can do axial linear reciprocating motion along the surface of the second threaded rod 402 respectively, so that the first connecting piece 8 and the second connecting piece 9 can drive the adjusting plate 7 connected with the surface of the lower column casing 201 through the rotating shaft under the action of the second thread sleeve 403, and the rotating motion around the rotating shaft connected with the rear connecting bracket 6, thus realizing the up-down adjustment of the steering wheel and the up-down space adjusting requirement of the driver in the tilting direction by the upper column casing 101 sleeved in the lower column casing 201;

the connection position between the second control portion 401 and the mounting seat corresponding to the lower surface of the lower column casing 201 and the connection position between the second thread bush 403 corresponding to the first connecting piece 8 and the second connecting piece 9 are assembled through threaded locating pins, so that the upper and lower adjusting mechanism 4 can be guaranteed to be in a detachable position with corresponding parts of the lower column casing 201, and the upper and lower adjusting mechanism 4 can be selected to vertically adjust the steering wheel position according to different types of automobile steering columns, so that the upper and lower adjusting mechanism 4 designed in the embodiment is not limited to this, and the upper and lower adjusting mechanism 4 can be changed and selected according to the types of different automobile steering columns.

Examples

Referring to fig. 1, in the embodiment 3, the first control part 301 and the second control part 401 are servo motors, and are electrically connected to a switch preset on the surface of the steering wheel in the automobile through wires, respectively.

In the invention, the first control part 301 and the second control part 401 are respectively and electrically connected with the switch of the steering wheel of the automobile, so that when a driver adjusts the position of the steering wheel, the front-rear adjusting mechanism 3 can be controlled to drive the upper pipe column assembly 1 to do axial and telescopic linear reciprocating adjustment along the inner part of the lower pipe column assembly 2 directly through the switch button on the steering wheel, the upper pipe column assembly 1 sleeved in the lower pipe column assembly 2 is driven by the upper-lower adjusting mechanism 4 to meet the requirements of drivers with different statures on the distance between the steering wheel and the self or is controlled to do rotary motion relative to the rear connecting bracket 6 around the rotary shaft connected between the lower pipe column assembly 2 and the rear connecting bracket 6, the vertical distance of the steering wheel is adjusted, and the requirement of the drivers with different statures on the upper-lower space of the steering wheel and the driver is met.

The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.

Claims (10)

1. An electric adjustment steering column comprises an upper column component (1) and a lower column component (2) sleeved on the outer surface of the upper column component (1), and is characterized in that the lower surface of the lower column component (2) is sequentially provided with a front-back adjusting mechanism (3) and an upper-lower adjusting mechanism (4) from left to right, one side of the lower column component (2) is provided with an adjusting chute (5) for driving the upper column component (1) to do linear reciprocating motion along the axis of the lower column component (2), the rear end surface of the lower column component (2) is provided with a concave rear connecting bracket (6), one side of the inner side wall of the rear connecting bracket (6) corresponding to the lower column component (2) is connected with an adjusting plate (7) which gradually bends downwards through a rotating shaft, the surface of one of the adjusting plates (7) is connected with a first connecting piece (8) which is in a Z-shaped structure through the rotating shaft, the bottom of one of the two adjusting plates (7) is fixedly connected with a second connecting piece (8) which is in a Z-shaped structure, the second connecting piece (8) is connected with a second connecting piece (9) corresponding to the second connecting piece (9) through the corresponding to the first connecting piece (9), and the upper and lower adjusting mechanism (4) is matched to drive the adjusting plate (7), the lower pipe column assembly (2) and the upper pipe column assembly (1) sleeved in the lower pipe column assembly, and the lower pipe column assembly (2) and the rear connecting bracket (6) are rotated around a rotating shaft connected between the lower pipe column assembly and the rear connecting bracket (6) relatively.

2. The electric power steering column according to claim 1, wherein the upper column assembly (1) comprises an upper column casing (101) and an upper transmission shaft (102) which are hollow and have a cylindrical structure, the surface of the upper transmission shaft (102) is pressed into a whole with the rear end of the upper column casing (101) through a bearing, the lower column assembly (2) comprises a lower column casing (201) and a lower transmission shaft (202), the lower column casing (201) is sleeved on the outer surface of the front end of the upper column casing (101), the surface of the lower transmission shaft (202) is pressed into a whole with the front end of the lower column casing (201) through a bearing, and spline grooves preset in the front end of the upper transmission shaft (102) are mutually slidably clamped with corresponding splines of the lower transmission shaft (202) at the rear end.

3. An electrically adjustable steering column according to claim 2, wherein the inner cavity of the upper column casing (101) is hollow and cylindrical, and the outer surface of the upper column casing (101) is in contact with the inner wall of the lower column casing (201).

4. An electrically adjustable steering column according to claim 2, wherein the front end of the lower column housing (201) is connected with an adapted front connecting bracket (10), and the adjusting plate (7) is connected to the corresponding surfaces of the lower column housing (201) and the rear connecting bracket (6) by connecting shafts, respectively.

5. The electric power steering column according to claim 4, wherein the upper column casing (101) and the front connecting bracket (10) are made of iron, and the lower column casing (201) and the rear connecting bracket (6) are made of aluminum.

6. The electric power steering column according to claim 4, wherein the rear connecting bracket (6) and the front connecting bracket (10) are of concave structures, the first connecting lugs with mounting holes are arranged on two sides of the rear connecting bracket (6), and the second connecting lugs with mounting holes are arranged on two sides of the front connecting bracket (10).

7. An electrically adjustable steering column according to claim 2, wherein the rear end of the upper drive shaft (102) is provided with external splines for mating with a steering wheel and being connected by means of nuts.

8. The electric power steering column according to claim 2, wherein the front-rear adjusting mechanism (3) comprises a first control part (301) arranged below the lower surface of the lower column casing (201), a first threaded rod (302) connected with the output end of the first control part (301), and a first threaded sleeve (303) connected with the surface of the first threaded rod (302) in a threaded manner, a movable frame (304) clamped on the inner wall of the adjusting chute (5) is connected with the surface of the first threaded sleeve (303), and the movable frame (304) extends into the lower column casing (201) through the adjusting chute (5) and is connected with the corresponding surface of the upper column casing (101) sleeved in the lower column casing (201).

9. An electrically adjustable steering column according to claim 2, wherein the up-down adjusting mechanism (4) comprises a second control part (401) connected to a lower surface mounting seat of the lower column casing (201), the second control part (401) is connected to a surface corresponding to one side of the lower column casing (201) through an extension edge with a convex surface, an output end of the second control part (401) is connected with a second threaded rod (402) located in an inclined direction of the lower surface of the lower column casing (201), a surface of the second threaded rod (402) is in threaded connection with a second thread sleeve (403) which is matched with the surface of the second threaded rod, and a surface of the second thread sleeve (403) is connected between a surface corresponding to the first connecting piece (8) and a surface corresponding to the second connecting piece (9).

10. The electric power steering column according to claim 8, wherein the first control part (301) and the second control part (401) are servo motors, and are electrically connected with a switch preset on the surface of a steering wheel in an automobile through wires, respectively.