Electric adjusting steering column with long adjusting stroke
By adopting a long-adjusting electric adjustment mechanism in the steering column, and using technologies such as length adjustment motor, motor screw, belt transmission, etc., the simultaneous telescopic movement of the inner and outer pipe columns is achieved, which solves the problem of limited length adjustment range of the existing steering column, and achieves a larger length adjustment range and a larger cab space.
Patent Information
- Application Number
- CN202311688477.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-08
- Publication Date
- 2025-06-10
AI Technical Summary
The adjustment range of the existing steering column length adjustment mechanism is limited, which cannot meet the individual needs of different drivers, and is not conducive to the storage of the steering wheel, resulting in insufficient cab space.
A long-adjusting stroke electric steering column is adopted. Through the combination of length adjustment motor, motor lead screw, belt, pulley, outer tube column length adjustment structure and inner tube column length adjustment structure, the simultaneous expansion and contraction movement of the inner tube column and the outer tube column are achieved, and the length adjustment range of the steering column is expanded.
It realizes flexible adjustment of the steering column length, adapts to the needs of different drivers, expands the adjustment range, improves the steering wheel storage capacity, and increases the cab space.
Smart Images
Figure CN120117025A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of automotive steering columns, and more particularly to an electric adjustable steering column with a long adjustment stroke. Background Art
[0002] The steering column is an important part of the automotive steering system and plays a crucial role in the field of automotive steering safety. At the same time, in order to provide a comfortable driving experience for different drivers, the adjustment form and range of the steering column play a significant role. At present, the length adjustment mechanism of the steering column mainly includes a length adjustment motor, a motor bracket, and an energy-absorbing sheet. The length adjustment motor is fixed on the aluminum housing of the steering column, connected to the motor bracket through a lead screw nut, the motor bracket is connected to the energy-absorbing sheet, and the energy-absorbing sheet is connected to the inner tube. When the length needs to be adjusted, the length adjustment motor drives the energy-absorbing sheet through the motor bracket, and then drives the inner tube to extend and contract in the aluminum housing, thereby adjusting the length of the steering column. However, due to the limitation of the length of the extended end of the inner tube, the adjustment length of the inner tube is limited, which cannot adapt to all drivers, and is not conducive to the storage of the steering wheel, and cannot form a larger space in the cab to meet the more personalized needs of modern people. Summary of the Invention
[0003] The object of the present invention is to provide an electric adjustable steering column with a long adjustment stroke, which increases the length adjustment range to meet the individual needs of different drivers.
[0004] The technical solution of the present invention:
[0005] An electric adjustable steering column with a long adjustment stroke includes an inner tube, an outer tube, an aluminum casting tube, and a bracket, and further includes a length adjustment mechanism; the length adjustment mechanism includes a length adjustment motor, a motor lead screw, a belt, a pulley, an outer tube length adjustment structure, and an inner tube length adjustment structure. The outer tube length adjustment structure is installed on the outer wall of the outer tube, and the inner tube length adjustment structure is installed on the outer wall of the inner tube; the length adjustment motor is fixed on the aluminum casting tube, the output end of the length adjustment motor is connected to the motor lead screw, the motor lead screw drives the outer tube to extend and contract in the aluminum casting tube through the outer tube length adjustment structure, a pulley is installed on the motor lead screw, a pulley is installed on the lead screw of the inner tube length adjustment structure, the belt is installed on the two pulleys, and the rotation of the motor lead screw drives the lead screw of the inner tube length adjustment structure to rotate through the pulley, thereby driving the inner tube to extend and contract in the outer tube.
[0006] Advantages of the Present Invention:
[0007] 1. The steering column of the present application can adjust the length according to the needs of the driver, and the adjustment range is large.
[0008] 2. The steering column of the present application realizes the adjustment within a long stroke range through belt drive. The length adjustment motor rotates to drive the motor lead screw to rotate, and then drives the inner lead screw and the outer lead screw to rotate through the belt, so as to simultaneously control the telescopic movement of the inner pipe column and the outer pipe column, adjust the length, and expand the adjustment range.
[0009] 3. The length adjustment structure of the present application can adopt a short-stroke length adjustment motor and a short lead screw, which can effectively control the jumping problem during the adjustment of the long lead screw, and does not need to develop a long-stroke adjustment motor, saving costs and space, and forming a larger space in the cab. BRIEF DESCRIPTION OF THE DRAWINGS
[0010] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained according to the provided drawings without creative efforts.
[0011] Figure 1 It is a schematic diagram of the overall structure of the electric adjustment steering column with a long adjustment stroke for the present application.
[0012] Figure 2 It is a sectional view of the overall structure of the electric adjustment steering column with a long adjustment stroke for the present application.
[0013] Figure 3 It is a schematic diagram of the outer pipe column and the length adjustment structure of the outer pipe column for the present application.
[0014] Figure 4 It is an exploded view of the outer pipe column and the length adjustment structure of the outer pipe column for the present application.
[0015] Figure 5 It is a schematic diagram of the inner pipe column and the length adjustment structure of the inner pipe column for the present application.
[0016] Figure 6 It is an exploded view of the inner pipe column and the length adjustment structure of the inner pipe column for the present application.
[0017] Reference Signs:
[0018] Length adjustment mechanism 1; Angle adjustment mechanism 2; Inner pipe column 3; Outer pipe column 4; Aluminum casting pipe 5; Bracket 6; Cage 7; Steel ball 8; Length adjustment motor 11; Motor lead screw 12; Belt 13; Outer pipe column length adjustment structure 15; Fixed guide block 151; Bushing 152; Length adjustment bracket 153; First nut 154; Length adjustment cage 155; Aluminum casting pipe chute 156; Long hole 157; Inner pipe column length adjustment structure 16; Second nut 161; Slide block 162; Lead screw 163; Chute 164; Bearing 165; Inner lead screw 166; Outer lead screw 167; Outer pipe column chute 168; Rivet 169. Detailed implementation mode
[0019] In order to solve the problems in the background art, the present application particularly invents a long-adjustment-stroke electric adjustment steering column, which increases the length adjustment range of the steering column, is convenient and applicable.
[0020] The present application will be described in detail below with reference to the accompanying drawings:
[0021] The electric adjustment steering column includes an existing length adjustment mechanism 1, an angle adjustment mechanism 2, a collapse mechanism, etc. The present application improves the length adjustment mechanism. The length adjustment mechanism 1 is used to adjust the inner pipe column 3, the outer pipe column 4 and the aluminum casting pipe 5 to form a three-stage telescopic structure. The aluminum casting pipe is sleeved outside the outer pipe column, the outer pipe column is sleeved outside the inner pipe column, and a cage 7 is provided between the inner pipe column and the outer pipe column. A plurality of round holes are opened on the outer periphery of the cage 7, and steel balls 8 are installed in the round holes, so that the inner pipe column makes telescopic movement relative to the outer pipe column within the outer pipe column.
[0022] A long-adjustment-stroke electric adjustment steering column of the present application includes an inner pipe column 3, an outer pipe column 4, an aluminum casting pipe 5 and a bracket 6, and further includes a length adjustment mechanism 1.
[0023] The length adjustment mechanism 1 includes a length adjustment motor 11, a motor lead screw 12, a belt 13, a pulley 14, an outer pipe column length adjustment structure 15 and an inner pipe column length adjustment structure 16. The outer pipe column length adjustment structure 15 is installed on the outer wall of the outer pipe column 4, and the inner pipe column length adjustment structure 16 is installed on the outer wall of the inner pipe column 3.
[0024] The length adjustment motor 11 is fixed on the aluminum casting pipe 5. The output end of the length adjustment motor 11 is connected to the motor lead screw 12. The motor lead screw 12 drives the outer pipe column to extend and contract within the aluminum casting pipe through the outer pipe column length adjustment structure 15. A pulley is installed on the motor lead screw 12, and a pulley is installed on the lead screw of the inner pipe column length adjustment structure 16. The belt 13 is installed on the two pulleys. The rotation of the motor lead screw 12 drives the rotation of the lead screw of the inner pipe column length adjustment structure 16 through the pulley, and further drives the inner pipe column to make telescopic movement within the outer pipe column.
[0025] The outer pipe column length adjustment structure 15 includes a fixed guide block 151, a bushing 152, a length adjustment bracket 153, a first nut 154, and a length adjustment cage 155. The fixed guide block is welded to the outer pipe column. The bushing is sleeved on the fixed guide block. The length adjustment bracket is provided with two light holes and is installed on the fixed guide block through fixing screws, pressing the bushing synchronously. The first nut is clamped by the length adjustment bracket and the length adjustment holding bracket. The length adjustment bracket and the length adjustment holding bracket are fixedly connected by bolts. The length adjustment motor rotates to drive the motor lead screw to rotate, and the motor lead screw pushes the first nut to move back and forth, thereby driving the telescopic movement of the outer pipe column. An aluminum casting pipe chute is provided at the relative position of the aluminum casting pipe and the outer pipe column length adjustment structure. A long hole 157 is opened on the upper side wall of the aluminum casting pipe chute 156. The outer pipe column length adjustment structure slides in the aluminum casting pipe chute, and the bushing is in interference fit with the aluminum casting pipe chute.
[0026] The inner pipe column length adjustment structure 16 includes a second nut 161, a slider 162, and a lead screw 163. A chute 164 is opened on the inner pipe column. The slider is in interference fit with the chute, and the slider and the inner pipe column are fixedly connected by a rivet 169. The connecting column under the second nut is in interference fit with the slider. The lead screw includes an inner lead screw 166 and an outer lead screw 167. The inner lead screw and the outer lead screw are threadedly connected. The outer lead screw is threadedly connected with the second nut. A pulley is installed on the inner lead screw. The pulley is connected to the pulley on the motor lead screw by a belt. The end of the inner lead screw is installed on the aluminum casting pipe through a bearing 165 (deep groove ball bearing). An outer pipe column chute 168 is provided at the relative position of the outer pipe column and the inner pipe column length adjustment structure. The second nut 161 slides in the outer pipe column chute 168.
[0027] The length adjustment motor drives the motor lead screw to rotate, and the first nut moves axially. The first nut drives the outer pipe column to move. The plastic bushing in the outer pipe column is in interference sliding fit with the aluminum casting pipe chute to ensure sliding stability. While the length adjustment motor drives the motor lead screw, it relies on belt drive to drive the lead screw in the inner pipe column to rotate. The lead screw drives the second nut in the inner pipe column to move, and the second nut drives the inner pipe column to move, thereby driving the steering wheel to expand and contract. The short-stroke motor realizes the long-stroke range adjustment through belt drive, which can effectively control the jumping problem during the adjustment of the long lead screw, and does not need to develop a long-stroke adjustment motor, saving costs and space, and is easier to be arranged in the vehicle space. The slider of the inner pipe column length adjustment structure is press-fitted into the chute for collapse of the inner pipe column and tightened with a rivet. The rivet provides the peak force, and the slider provides the continuous force by sliding in the inner pipe column chute in interference fit.
[0028] Specific installation and working process:
[0029] A chute is machined at the position where the inner pipe column is matched with the collapsible slider. The connecting column of the slider is in interference fit with the inner pipe column. Synchronously, the inner pipe column and the slider are provided with circular through holes, and the inner pipe column and the slider are fixed tightly by a rivet. The cage is provided with irregular circular holes with different numbers. The steel balls are fixed in the circular holes on the cage. The outer pipe column and the inner pipe column are matched through the cage and the steel balls to achieve sliding. A guide block is fixedly welded on the outer pipe column, and a plastic bushing is sleeved on the fixed guide block. The length adjustment bracket is provided with two light holes and is installed on the fixed guide block through fixing screws, synchronously pressing the plastic bushing. The first nut is clamped by the length adjustment bracket and the length adjustment retaining bracket, and the installation bolt is tightened and fixed. The length adjustment motor is provided with a motor lead screw. When the length adjustment motor rotates, it drives the motor lead screw to rotate. The motor lead screw pushes the first nut to move in length, thereby pushing the outer pipe column to move in length for length adjustment. The outer lead screw and the second nut are provided with external threads in cooperation, and synchronously the inner lead screw is provided with internal threads in cooperation. The motor lead screw of the length adjustment motor is provided with a pulley. When the length adjustment motor rotates, it drives the belt to rotate. The inner lead screw is driven to rotate through the belt. The inner lead screw drives the outer lead screw to rotate. The outer lead screw drives the second nut to move in length for adjustment, thereby driving the inner pipe column to move in length. The telescopic movement of the inner pipe column and the outer pipe column realizes the length adjustment of the pipe column.
[0030] The above schematically describes the present invention and its implementation manners. This description is not restrictive. What is shown in the drawings is only one of the implementation manners of the present invention, and the actual structure is not limited thereto. Therefore, if those of ordinary skill in the art are inspired by it and, without departing from the content of the technical solution of the present invention, design similar structural manners and implementations to the technical solution without creative efforts based on the technical essence of the present invention, they shall fall within the protection scope of the present invention.
Claims
1. A long-adjustment-travel electric adjustable steering column, characterized in that: it includes an inner tube column, an outer tube column, an aluminum casting tube and a bracket, and further includes a length adjustment mechanism; the length adjustment mechanism includes a length adjustment motor, a motor lead screw, a belt, a pulley, an outer tube column length adjustment structure and an inner tube column length adjustment structure. The outer tube column length adjustment structure is installed on the outer wall of the outer tube column, and the inner tube column length adjustment structure is installed on the outer wall of the inner tube column; the length adjustment motor is fixed on the aluminum casting tube, the output end of the length adjustment motor is connected to the motor lead screw, the motor lead screw drives the outer tube column to extend and contract in the aluminum casting tube through the outer tube column length adjustment structure. A pulley is installed on the motor lead screw, a pulley is installed on the lead screw of the inner tube column length adjustment structure, the belt is installed on the two pulleys, and the rotation of the motor lead screw drives the lead screw of the inner tube column length adjustment structure to rotate through the pulley and the belt, and then drives the inner tube column to extend and contract in the outer tube column through the inner tube column length adjustment structure.
2. A long-adjustment-travel electric adjustable steering column according to claim 1, characterized in that: the outer tube column length adjustment structure includes a fixed guide block, a bushing, a length adjustment bracket, a first nut, and a length adjustment retainer. The fixed guide block is welded on the outer tube column, the bushing is sleeved on the fixed guide block, the length adjustment bracket is provided with two light holes and is installed on the fixed guide block through fixing screws, synchronously pressing the bushing. The first nut is clamped by the length adjustment bracket and the length adjustment retainer bracket, and the length adjustment bracket and the length adjustment retainer bracket are fixedly connected by bolts. The rotation of the length adjustment motor drives the motor lead screw to rotate, and the motor lead screw pushes the first nut to move back and forth, thereby driving the outer tube column to expand and contract. The aluminum casting tube is provided with an aluminum casting tube chute with a long hole at the relative position of the outer tube column length adjustment structure, and the outer tube column length adjustment structure slides in the aluminum casting tube chute, and the bushing is in interference fit with the aluminum casting tube chute.
3. A long-adjustment-travel electric adjustable steering column according to claim 1, characterized in that: the inner tube column length adjustment structure includes a second nut, a slider, and a lead screw. A chute is opened on the inner tube column, the slider and the inner tube column are fixedly connected by rivets, and the connecting column of the slider is in interference fit with the chute. The second nut is in interference fit with the slider. The lead screw includes an inner lead screw and an outer lead screw, the inner lead screw and the outer lead screw are threadedly connected, the outer lead screw is threadedly connected with the second nut, a pulley is installed on the inner lead screw, the pulley is connected to the pulley on the motor lead screw through a belt, and the free end of the inner lead screw is installed on the aluminum casting tube through a bearing; a chute of the outer tube column is provided at the corresponding position of the inner tube column length adjustment structure on the outer tube column, and the second nut slides in the chute of the outer tube column.