Crumple mechanism for electrically adjusting tubular column

Abstract

The utility model relates to the technical field of automobile steering systems, in particular to a crumple mechanism of an electric adjusting tubular column, which comprises an upper column tube, an energy absorption belt, a fastener, a fixing clamp and a lead screw nut, the head and the tail of the energy absorption belt are connected through a U-shaped bending structure, and the head of the energy absorption belt is fixedly welded with the side face of the upper column tube. The tail portion of the energy absorption belt and the lead screw nut are fixed through a fastener, the tail end of the energy absorption belt is installed on a fixing clamp, and the fixing clamp is installed on the side face of the lower end of the upper column pipe. Compared with the prior art, the crumple mechanism of the electric adjusting pipe column is improved, parts are reduced, the internal space of the upper column pipe is reduced, and the assembly cost is reduced; when the vehicle is impacted, crumple energy absorption is achieved through self deformation of the energy absorption belt, and the safety of a driver is guaranteed. The device has the advantages of being simple in structure, safe, reliable, high in assembly efficiency and not prone to producing defective products.

Description

Technical Field

[0001] This utility model relates to the field of automotive steering system technology, specifically a collapsible mechanism for an electrically adjustable column. Background Technology

[0002] The steering column is a crucial component of a car's steering system. Under normal operation, the steering column primarily connects the steering wheel and the steering gear, receiving torque and speed from the steering wheel and transmitting them to the steering gear. In the event of a collision, the steering column also plays a protective role, and the collapsible energy-absorbing mechanism is the main component that enables the steering column to perform this protective function.

[0003] Traditional crumple energy-absorbing mechanisms occupy a large space and require many parts for fixation, which poses significant limitations when installed on vehicles with limited space.

[0004] Therefore, it is necessary to design a collapsing mechanism for an electrically adjustable tubing column that can save space, reduce parts, and lower installation limitations while ensuring collapsing performance. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a collapsing mechanism for an electrically adjustable tubing column, which can save space, reduce parts, and reduce installation limitations while ensuring collapsing performance.

[0006] To achieve the above objectives, this utility model provides a collapsing mechanism for an electrically adjustable tube column, comprising an upper tube, an energy-absorbing band, fasteners, a fixing clamp, and a lead screw nut. The head and tail of the energy-absorbing band are connected by a U-shaped bending structure. The head of the energy-absorbing band is welded and fixed to the side of the upper tube, and the tail of the energy-absorbing band is fixed to the lead screw nut by fasteners. The tail end of the energy-absorbing band is mounted on the fixing clamp, which is mounted on the lower side of the upper tube.

[0007] The welding length of the energy-absorbing band is at least one-third of the total length of the energy-absorbing band.

[0008] The fasteners consist of two bolts.

[0009] The lead screw nut and the lead screw are connected by a thread, and the end of the lead screw is connected to the shaft of the motor sub-assembly.

[0010] The upper column tube is sleeved outside the steering shaft, and the upper end of the upper column tube is fixed to the upper end of the steering shaft. The lower column tube is sleeved outside the upper column tube. The lead screw nut is located in the elongated hole on the side of the upper column tube. The fixing clamp and the energy-absorbing band are located between the upper column tube and the lower column tube.

[0011] Compared with existing technologies, this invention improves the collapsing mechanism of the electrically adjustable column, reducing the number of parts, the internal space of the upper column tube, and the assembly cost. When a vehicle is subjected to impact, the energy-absorbing band deforms to achieve collapsing energy absorption, ensuring driver safety. This invention has the advantages of simple structure, safety and reliability, high assembly efficiency, and low likelihood of defective products. Attached Figure Description

[0012] Figure 1 This is an exploded view of the present invention.

[0013] Figure 2 This is a cross-sectional view of the present invention.

[0014] Figure 3 This is a diagram showing the normal usage state of this utility model.

[0015] Figure 4 This is a diagram showing the usage state of this utility model in a collapsed state. Detailed Implementation

[0016] The present invention will now be further described with reference to the accompanying drawings.

[0017] See Figure 1 , Figure 2 This utility model is a collapsible mechanism for an electrically adjustable column, including an upper column tube, an energy-absorbing band, fasteners, a fixing clamp, and a lead screw nut. The head 21 and tail 22 of the energy-absorbing band 2 are connected by a U-shaped bending structure 23. The head 21 of the energy-absorbing band 2 is welded and fixed to the side of the upper column tube 1. The tail 22 of the energy-absorbing band 2 is fixed to the lead screw nut 5 by a fastener 3. The tail end of the energy-absorbing band 2 is installed on the fixing clamp 4, and the fixing clamp 4 is installed on the lower side of the upper column tube 1.

[0018] The welding length of the energy-absorbing band 2 is at least one-third of the total length of the energy-absorbing band 2. The energy-absorbing band 2 can deform well along the arc surface of the upper column tube 1 at its end face, ensuring that the deformation force of the energy-absorbing band 2 will not fluctuate during deformation.

[0019] Preferably, fastener 3 consists of two bolts.

[0020] The lead screw nut 5 and the lead screw 6 are connected by threads. The end of the lead screw 6 is connected to the shaft of the motor sub-assembly 7. When the motor sub-assembly 7 is working, it drives the lead screw 6 to rotate, thereby driving the lead screw nut 5 to move up and down.

[0021] See Figure 3 The upper column tube 1 is sleeved outside the steering shaft 8, and the upper end of the upper column tube 1 is fixed to the upper end of the steering shaft 8. The lower column tube 9 is sleeved outside the upper column tube 1. The lead screw nut 5 is located in the elongated hole on the side of the upper column tube 1. The fixing clamp 4 and the energy absorption band 2 are located between the upper column tube 1 and the lower column tube 9.

[0022] See Figure 4 When a vehicle is impacted, the impact force transmitted through the steering wheel is transferred to the upper column tube 1 via the steering shaft 8, and then from the upper column tube 1 to the energy-absorbing band 2. Since the motor sub-assembly 7 is not operating at this time, the lead screw nut 5 is fixed to the lead screw 6 and cannot move, keeping the tail end 22 of the energy-absorbing band 2 in a fixed position. As the upper column tube 1 continues to move downwards, the tail end of the energy-absorbing band 2 separates from the fixing clamp 4. The impact force acts on the energy-absorbing band 2, causing it to deform and generate a crumple force, thus achieving energy absorption through crumple.

[0023] This invention improves the collapsing mechanism of the electrically adjustable column, reducing the number of parts, the internal space of the upper column tube, and the assembly cost. When a vehicle is subjected to impact, the energy-absorbing band deforms to achieve collapsing energy absorption, ensuring driver safety. This invention has the advantages of simple structure, safety and reliability, high assembly efficiency, and low likelihood of defective products.

Claims

1. A collapsing mechanism for an electrically adjustable column, comprising an upper column tube, an energy-absorbing band, fasteners, a fixing clamp, and a lead screw nut, characterized in that: The head (21) and tail (22) of the energy-absorbing band (2) are connected by a U-shaped bending structure (23). The head (21) of the energy-absorbing band (2) is welded and fixed to the side of the upper column tube (1). The tail (22) of the energy-absorbing band (2) is fixed to the screw nut (5) by a fastener (3). The tail end of the energy-absorbing band (2) is installed on the fixing clamp (4). The fixing clamp (4) is installed on the lower side of the upper column tube (1).

2. The collapsing mechanism of an electrically adjustable column according to claim 1, characterized in that: The welding length of the energy-absorbing band (2) is at least one-third of the total length of the energy-absorbing band (2).

3. The collapsing mechanism of an electrically adjustable column according to claim 1, characterized in that: The fastener (3) consists of two bolts.

4. The collapsing mechanism of an electrically adjustable column according to claim 1, characterized in that: The lead screw nut (5) and the lead screw (6) are connected by threads, and the end of the lead screw (6) is connected to the shaft of the motor sub-assembly (7).

5. The collapsing mechanism of an electrically adjustable tubular column according to claim 1, characterized in that: The upper column tube (1) is sleeved outside the steering shaft (8), and the upper end of the upper column tube (1) is fixed to the upper end of the steering shaft (8). The lower column tube (9) is sleeved outside the upper column tube (1). The screw nut (5) is located in the elongated hole on the side of the upper column tube (1). The fixing clamp (4) and the energy absorption band (2) are located between the upper column tube (1) and the lower column tube (9).

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