Electric telescopic mechanism of automobile steering wheel

Abstract

The utility model relates to the field of automobile steering wheels, in particular to an electric telescopic mechanism of an automobile steering wheel, which comprises a connecting seat. The device further comprises a threaded piece, a butt joint base, a first connecting rod, a lifting disc, an electric push rod, a positioning base and a second connecting rod. A bearing is installed in the center of the upper surface of the connecting base. By arranging the electric push rod, when the front side of the vehicle is impacted, a controller arranged in the vehicle can start the electric push rod to enable the electric push rod to contract so as to drive the lifting disc to move upwards, and the lifting disc can pull the end, connected with the lifting disc, of the first connecting rod while moving; the butt joint seat can contract towards one side of the lifting disc under the cooperation of a second connecting rod, so that a threaded sheet is separated from a threaded pipe, the threaded sheet is not limited by threads of the threaded pipe and can freely slide up and down in the threaded pipe, and the steering wheel can retract inwards; therefore, hard collision between the driver and the steering wheel is reduced.

Description

Technical Field

[0001] This utility model relates to the field of automobile steering wheels, and more particularly to an electric telescopic mechanism for automobile steering wheels. Background Technology

[0002] An electric telescopic steering wheel mechanism is an adjustable system driven by an electric motor. It is mainly used to automatically adjust the fore-and-aft position of the steering wheel according to the driver's needs. Its core function is to improve driving comfort and safety. It is usually used in conjunction with an electric tilt adjustment mechanism to achieve multi-dimensional adjustment of the steering wheel position.

[0003] If a collision occurs during use, the existing electric telescopic steering wheel mechanism cannot release the transmission limit, and the steering wheel cannot retract inward. This results in a large hard impact force between the driver and the steering wheel, which provides poor protection for the driver's personal safety.

[0004] Therefore, in response to the problem that the existing electric retractable steering wheel mechanism cannot release the transmission limit during a collision, resulting in the steering wheel not being able to collapse and increasing the risk of a hard collision between the driver and the steering wheel, there is an urgent need to design a new type of electric retractable steering wheel mechanism. Utility Model Content

[0005] To overcome the problem that existing electric telescopic steering wheel mechanisms cannot release the transmission limit during a collision, resulting in the steering wheel not collapsing and increasing the risk of a hard collision between the driver and the steering wheel.

[0006] The technical solution of this utility model is as follows: an electric telescopic mechanism for an automobile steering wheel, including a connecting seat; it also includes threaded plates, docking seats, a first connecting rod, a lifting plate, an electric push rod, a positioning seat, and a second connecting rod. A bearing is installed at the center of the upper surface of the connecting seat. A threaded tube is connected to the inner ring surface of the bearing. Three circumferentially distributed threaded plates are connected to the inner surface of the threaded tube. A docking seat is installed on the inner surface of each of the three threaded plates. One end of the first connecting rod is rotatably connected to the lower part of the side surface of the docking seat away from the corresponding threaded plate. The other end of the first connecting rod is connected to the lifting plate. An electric push rod is connected at the center of the upper surface of the lifting plate. A positioning seat is sleeved in the middle of the outer surface of the electric push rod. One end of the second connecting rod is rotatably connected to the outer surface of the positioning seat corresponding to the three docking seats. The other end of the second connecting rod is rotatably connected to the corresponding docking seat.

[0007] Preferably, by setting an electric push rod, when a frontal impact occurs, the vehicle's built-in controller can activate the electric push rod to retract, thereby moving the lifting plate upward. Simultaneously, the lifting plate pulls the end of the first connecting rod connected to it, and with the cooperation of the second connecting rod, the docking seat retracts towards one side of the lifting plate. This causes the threaded plate to disengage from the threaded tube, freeing it from the threaded tube's constraint and allowing it to slide freely up and down inside the tube. This allows the steering wheel to retract inward, reducing the hard impact between the driver and the steering wheel. This solves the problem that existing electric steering wheel telescopic mechanisms, when in use, cannot release the transmission limit in the event of a collision, preventing the steering wheel from retracting inward and resulting in a large hard impact force between the driver and the steering wheel, thus offering low protection for the driver's safety.

[0008] Preferably, a connecting tube is installed on the upper surface of the positioning seat outside the electric push rod, and a mounting seat is provided on the top surface of the connecting tube.

[0009] Preferably, a drive motor is installed on the upper surface of the connector on the left side, and a drive gear is provided at the output end of the drive motor. A driven gear ring is installed on the lower part of the outer surface of the threaded tube, and the drive gear meshes with the driven gear ring.

[0010] Preferably, a damping spring is installed on the upper surface of the connecting seat, located inside the bearing, and a positioning plate is provided on the upper surface of the damping spring.

[0011] Preferably, the upper surface of the positioning plate has limit holes on both the left and right sides, and the bottom surface of the lifting plate is provided with a limit rod corresponding to the position of the limit hole, with the limit rod and the limit hole being slidably connected through each other.

[0012] Preferably, the upper surface of the connector has connecting screw holes on both the left and right sides, and the connecting screw holes penetrate the connector.

[0013] Preferably, the driven toothed ring is fixed to the threaded tube by welding.

[0014] The beneficial effects of this utility model are:

[0015] 1. By setting up an electric push rod, when a forward collision occurs, the vehicle controller will immediately trigger the electric push rod to retract urgently, driving the lifting plate to move upward. The lifting plate, through the linkage of the first and second links, causes the docking seat to retract rapidly, causing the threaded plate to disengage from the threaded tube. At this time, the threaded plate can slide freely in the threaded tube, and the steering wheel assembly is released from mechanical locking. This effectively buffers the hard impact between the driver and the steering wheel, reduces the risk of injury, and realizes dynamic safety adjustment of the steering wheel position under collision conditions. This solves the problem that when the existing electric telescopic mechanism of the car steering wheel is in use, if a collision occurs, the telescopic structure cannot release the transmission limit, the steering wheel cannot retract inward, resulting in a large hard impact force between the driver and the steering wheel, and low protection for the driver's personal safety. Attached Figure Description

[0016] Figure 1 The diagram shown is a three-dimensional structural schematic of an electric telescopic mechanism for an automobile steering wheel according to this utility model.

[0017] Figure 2 The diagram shown is a three-dimensional structural schematic of the threaded plate of an electric telescopic mechanism for an automobile steering wheel according to this utility model.

[0018] Figure 3 The diagram shown is a three-dimensional structural schematic of the lifting plate of an electric telescopic mechanism for an automobile steering wheel according to this utility model.

[0019] Figure 4 The diagram shown is a three-dimensional structural schematic of a damping spring in an electric telescopic mechanism for an automobile steering wheel according to this utility model.

[0020] Figure 5 The diagram shown is a three-dimensional structural schematic of the drive gear of an electric telescopic mechanism for an automobile steering wheel according to this utility model.

[0021] Explanation of reference numerals in the attached drawings: 1. Connecting seat; 2. Bearing; 3. Threaded pipe; 4. Threaded plate; 5. Connecting seat; 6. First connecting rod; 7. Lifting plate; 8. Electric push rod; 9. Positioning seat; 10. Second connecting rod; 11. Connecting pipe; 12. Mounting seat; 13. Drive motor; 14. Drive gear; 15. Driven gear ring; 16. Damping spring; 17. Positioning plate; 18. Limiting hole; 19. Limiting rod; 20. Connecting screw hole. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0023] Please see Figures 1-5This utility model provides an embodiment of an electric telescopic mechanism for an automobile steering wheel, including a connecting seat 1; it also includes threaded plates 4, mating seats 5, a first connecting rod 6, a lifting plate 7, an electric push rod 8, a positioning seat 9, and a second connecting rod 10. A bearing 2 is installed at the center of the upper surface of the connecting seat 1. A threaded tube 3 is connected to the inner ring surface of the bearing 2. Three circumferentially distributed threaded plates 4 are connected to the inner surface of the threaded tube 3. A mating seat 5 is installed on the inner surface of each of the three threaded plates 4. One end of the first connecting rod 6 is rotatably connected to the lower side of the mating seat 5 away from the corresponding threaded plate 4. The other end of the first connecting rod 6 is connected to the lifting plate 7. An electric push rod 8 is connected to the center of the upper surface of the lifting plate 7. A positioning seat 9 is sleeved in the middle of the outer surface of the electric push rod 8. One end of the second link 10 is rotatably connected to each of the three docking seats 5 on the surface. The other end of the second link 10 is rotatably connected to the corresponding docking seat 5. By setting an electric push rod 8, when the front of the vehicle is impacted, the vehicle's built-in controller can activate the electric push rod 8 to retract, thereby driving the lifting plate 7 to move upward. While the lifting plate 7 is moving, it can pull the end of the first link 6 connected to it. With the cooperation of the second link 10, the docking seat 5 can retract to one side of the lifting plate 7, so that the threaded piece 4 is disengaged from the threaded tube 3. Thus, the threaded piece 4 is no longer restricted by the thread of the threaded tube 3 and can slide freely up and down inside the threaded tube 3, thereby allowing the steering wheel to retract inward, thereby reducing the hard collision between the driver and the steering wheel.

[0024] Please see Figures 1-5 In this embodiment, a connecting pipe 11 is installed on the upper surface of the positioning seat 9, outside the electric push rod 8. A mounting seat 12 is provided on the top surface of the connecting pipe 11. By setting the connecting pipe 11 and the mounting seat 12, it is easy to connect and install the steering wheel structure through the mounting seat 12. A drive motor 13 is installed on the upper surface of the connecting seat 1, on the left side. A drive gear 14 is provided at the output end of the drive motor 13. A driven gear ring 15 is installed on the lower part of the outer surface of the threaded pipe 3. The drive gear 14 and the driven gear ring 15 mesh with each other. By setting the drive motor 13, During operation, its output end can drive the drive gear 14 to rotate. When the drive gear 14 rotates, it can drive the driven gear ring 15 that meshes with it to rotate synchronously, so that the threaded tube 3 rotates under the action of the bearing 2. The upper surface of the connecting seat 1 is equipped with a damping spring 16 located inside the bearing 2. The upper surface of the damping spring 16 is provided with a positioning piece 17. By setting the damping spring 16, after the threaded piece 4 retracts, the whole will slide down and contact the damping spring 16. The damping spring 16 cooperates with the airbag to achieve a high buffering effect.

[0025] Please see Figures 1-5In this embodiment, limiting holes 18 are provided on both the left and right sides of the upper surface of the positioning piece 17. A limiting rod 19 is provided on the bottom surface of the lifting plate 7 corresponding to the position of the limiting hole 18. The limiting rod 19 and the limiting hole 18 are slidably connected. By setting the limiting rod 19 and the limiting hole 18, the rotation of the lifting plate 7 and other structures can be restricted, ensuring that the threaded piece 4 can cooperate normally with the threaded tube 3 when the threaded tube 3 rotates, so as to achieve extension and retraction. Connecting screw holes 20 are provided on both the left and right sides of the upper surface of the connecting seat 1. The connecting screw holes 20 penetrate the connecting seat 1. By setting the connecting screw holes 20, it is easy to connect the connecting seat 1 with the steering structure or angle adjustment structure of the steering wheel. The driven gear ring 15 and the threaded tube 3 are fixed by welding. By fixing the driven gear ring 15 and the threaded tube 3 by welding, the fixing strength can be improved and loosening can be avoided.

[0026] During operation, the connecting pipe 11 and mounting base 12 facilitate docking and installation with the steering wheel structure via the mounting base 12. The drive motor 13 drives the drive gear 14 to rotate during operation. When the drive gear 14 rotates, it drives the driven gear ring 15 to rotate synchronously, thereby causing the threaded pipe 3 to rotate under the action of the bearing 2. The damping spring 16 is provided. After the threaded plate 4 retracts, the whole will slide down and contact the damping spring 16. The damping spring 16 works with the airbag to provide a high buffering effect. The limiting rod 19 and limiting hole 18 limit the rotation of the lifting plate 7 and other structures, ensuring that the threaded plate 4 can properly engage with the threaded pipe 3 to achieve extension and retraction when the threaded pipe 3 rotates. The connecting screw hole 20 facilitates docking and installation with the steering structure or angle adjustment structure of the steering wheel. The driven gear ring 15 and the threaded pipe 3 are fixed by welding, which improves the fixing strength and prevents loosening.

[0027] Through the above steps, when a forward collision occurs, the vehicle controller immediately triggers the electric push rod 8 to retract urgently, causing the lifting plate 7 to move upward. The lifting plate 7, through the linkage of the first link 6 and the second link 10, causes the docking seat 5 to retract rapidly, resulting in the threaded plate 4 disengaging from the threaded tube 3. At this time, the threaded plate 4 can slide freely within the threaded tube 3, and the steering wheel assembly is released from mechanical locking. This effectively buffers the hard collision between the driver and the steering wheel, reducing the risk of injury. It achieves dynamic safety adjustment of the steering wheel position under collision conditions, thus solving the problem that when the existing electric telescopic mechanism of the car steering wheel is in use, if a collision occurs, the telescopic structure cannot release the transmission limit, and the steering wheel cannot retract inward, resulting in a large hard collision force between the driver and the steering wheel, which has low protection for the driver's personal safety.

Claims

1. A power telescopic steering column assembly for a vehicle comprising a coupling base (1); characterised in that: Also include threaded sheet (4), butt joint seat (5), the first connecting rod (6), lifting disc (7), electric push rod (8), positioning seat (9) and the second connecting rod (10), the upper surface center position of connecting seat (1) is equipped with bearing (2), the inner ring surface of bearing (2) is connected with threaded pipe (3), the inner surface of threaded pipe (3) is connected with three circumferential distribution threaded sheet (4), the inner side surface of three threaded sheet (4) is equipped with butt joint seat (5), the side surface of butt joint seat (5) away from corresponding threaded sheet (4) is rotatably connected with one end of first connecting rod (6) at lower position, the other end of first connecting rod (6) is connected with lifting disc (7), the upper surface center position of lifting disc (7) is connected with electric push rod (8), the outer surface middle position of electric push rod (8) is sleeved with positioning seat (9), the outer surface of positioning seat (9) is rotatably connected with one end of second connecting rod (10) at the position corresponding to three butt joint seat (5), the other end of second connecting rod (10) is rotatably connected with corresponding butt joint seat (5).

2. The electric telescopic steering wheel mechanism of claim 1, wherein: The upper surface of positioning seat (9) is rotatably connected with connecting pipe (11) outside electric push rod (8), the top surface of connecting pipe (11) is provided with mounting seat (12).

3. The electric telescopic steering wheel mechanism of claim 1, wherein: The upper surface of connecting seat (1) is rotatably connected with driving motor (13) at left position, the output end of driving motor (13) is provided with driving gear (14), the outer surface of threaded pipe (3) is rotatably connected with driven gear ring (15) at lower position, driving gear (14) is engaged with driven gear ring (15).

4. The electric telescopic steering wheel mechanism of claim 1, wherein: The upper surface of connecting seat (1) is rotatably connected with damping spring (16) inside bearing (2), the upper surface of damping spring (16) is provided with positioning sheet (17).

5. The electric telescopic steering wheel mechanism of claim 4, wherein: The upper surface of positioning sheet (17) is rotatably connected with limiting hole (18) at left and right sides, the bottom surface of lifting disc (7) is provided with limiting rod (19) at the position corresponding to limiting hole (18), limiting rod (19) is rotatably connected with limiting hole (18).

6. The electric telescopic steering wheel mechanism of claim 1, wherein: The upper surface of connecting seat (1) is rotatably connected with connecting screw hole (20) at left and right sides, connecting screw hole (20) is rotatably connected with connecting seat (1).

7. The electric telescopic steering wheel mechanism of claim 3, wherein: Driven gear ring (15) and threaded pipe (3) are fixed by welding.

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