Crumple structure of steering column

Abstract

The utility model relates to the technical field of steering columns, in particular to a crumple structure of a steering column, which comprises an energy absorption belt support, an energy absorption belt, a crumple rivet, an energy absorption belt rivet, a pin shaft, a crumple pipe, a crumple pipe support and a lead screw support. The initial peak force is reduced; the energy absorption belt is matched with the crumple pipe support pin shaft, so that the crumple force in the crumple process is more stable; the gaps between the energy-absorbing belt and the energy-absorbing belt support, the crumple rivet and the energy-absorbing belt rivet avoid abnormal sound generated by collision of parts in the axial adjustment process.

Description

Technical Field

[0001] The utility model relates to the technical field of steering columns, and particularly to a collapsible structure of a steering column. Background Art

[0002] The steering column is a very important component of an automobile. Its main function is to transmit the angle of the steering wheel to the steering gear and drive the tires to turn. Therefore, the precision of the steering column parts is very high. When a vehicle collision occurs, the steering column needs to have the function of collapsing and absorbing energy to protect the safety of the driver.

[0003] When a vehicle collision occurs, the steering column needs to have a good collapsing device to ensure a stable collapsing force. At present, the peak force of the collapsing force of the steering column collapsing structure is relatively large, and the collapsing force fluctuates greatly. When axially adjusted, abnormal noises occur due to part collisions, which cannot meet the requirements of customers.

[0004] Therefore, it is necessary to design a collapsible structure of a steering column to meet the requirements of small initial peak force, stable collapsing force, and avoidance of abnormal noises during axial adjustment of users. Summary of the Invention

[0005] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a collapsible structure of a steering column to meet the requirements of small initial peak force, stable collapsing force, and avoidance of abnormal noises during axial adjustment of users.

[0006] To achieve the above purpose, the collapsible structure of the steering column of the utility model includes a collapsible belt support, a collapsible belt, a collapsible rivet, a collapsible belt rivet, a pin shaft, a collapsible tube, a collapsible tube support, and a lead screw support. The collapsible tube support and the collapsible belt support are arranged along the axial direction of the collapsible tube, and the collapsible tube support is located on the side of the collapsible belt support away from the steering wheel. The collapsible tube support is fixedly welded to the collapsible tube. The collapsible belt support is connected to the collapsible tube by two collapsible rivets. One collapsible rivet is located in the U-shaped groove at the bottom of the collapsible belt support. The collapsible belt support is fixed to the lead screw support. The tail of the collapsible belt is located inside the collapsible belt support. After the head of the collapsible belt bypasses the pin shaft of the collapsible tube support, it is fixed to the collapsible belt support by a collapsible belt rivet. Gaps are respectively provided between the two corresponding sides of the collapsible belt tail and the collapsible belt support, between the bottom surface of the collapsible belt tail and the head of the collapsible rivet, and between the top surface of the collapsible belt tail and the bottom of the collapsible belt rivet.

[0007] The collapsible belt support and the lead screw support are fixed by bolts. The lead screw support is connected to a lead screw nut. The lead screw nut is sleeved on the lead screw. The lead screw is connected to the shaft of the motor.

[0008] There are two bolts.

[0009] The width of the gap is 1 mm.

[0010] The U-shaped groove is arranged on one side of the energy absorbing belt bracket close to the collapsible tube bracket, and the opening direction of the U-shaped groove is the same as the collapsing direction of the collapsible tube.

[0011] The width of the U-shaped groove is greater than the tail diameter of the collapsing rivet.

[0012] The pin shaft is installed in the mounting hole of the collapsible tube bracket, and the inner diameter of the mounting hole is smaller than the diameter of the pin shaft.

[0013] Compared with the prior art, the U-shaped groove at the bottom of the energy absorbing belt bracket cooperates with the collapsing rivet, reducing the initial peak force; the cooperation between the energy absorbing belt and the pin shaft of the collapsible tube bracket makes the collapsing force during the collapsing process more stable; the gaps between the energy absorbing belt, the energy absorbing belt bracket, the collapsing rivet, and the energy absorbing belt rivet avoid abnormal noises caused by part collisions during axial adjustment. Description of the Drawings

[0014] Figure 1 It is a schematic structural diagram of the present utility model.

[0015] Figure 2 It is the front view of the collapsible tube bracket and the energy absorbing belt bracket of the present utility model.

[0016] Figure 3 It is the top view of the collapsible tube bracket and the energy absorbing belt bracket of the present utility model.

[0017] Figure 4 It is the bottom view of the collapsible tube bracket and the energy absorbing belt bracket of the present utility model. Detailed Embodiment

[0018] The present utility model will be further described in conjunction with the accompanying drawings.

[0019] Refer to Figure 1 , the present utility model is a collapsible structure of a steering column, including an energy absorbing belt bracket, an energy absorbing belt, a collapsing rivet, an energy absorbing belt rivet, a pin shaft, a collapsible tube, a collapsible tube bracket, and a lead screw bracket. The collapsible tube bracket 1 and the energy absorbing belt bracket 3 are arranged along the axial direction of the collapsible tube 2, and the collapsible tube bracket 1 is located on the side of the energy absorbing belt bracket 3 away from the steering wheel, that is, Figure 1 the left side shown in the figure. The collapsible tube bracket 1 is fixedly welded to the collapsible tube 2. The energy absorbing belt bracket 3 is connected to the collapsible tube 2 by two collapsing rivets 4. One collapsing rivet 4 is located in the U-shaped groove 31 at the bottom of the energy absorbing belt bracket 3. The energy absorbing belt bracket 3 is fixed to the lead screw bracket 8. The tail of the energy absorbing belt 6 is located inside the energy absorbing belt bracket 3. After the head of the energy absorbing belt 6 bypasses the pin shaft 5 of the collapsible tube bracket 1, it is fixed to the energy absorbing belt bracket 3 by an energy absorbing belt rivet 7.

[0020] Refer to Figure 2 , Figure 3, there are gaps respectively between both sides of the tail of the energy absorption band 6 and the corresponding side edges of the energy absorption band bracket 3, between the bottom surface of the tail of the energy absorption band 6 and the head of the collapse rivet 4, and between the top surface of the tail of the energy absorption band 6 and the bottom of the energy absorption band rivet 7. Preferably, the width of the gap is 1 mm. The setting of the gap can ensure that the movement track of the energy absorption band 6 is relatively stable when the collapse tube 2 collapses, and there will be no situation of shaking up, down, left or right, so as to provide a stable collapse force and avoid collision abnormal sounds between the energy absorption band 6 and the energy absorption band bracket 3, the energy absorption band rivet 7, and the collapse rivet 4.

[0021] The energy absorption band bracket 3 and the lead screw bracket 8 are fixed by bolts 9. The lead screw bracket 8 is connected to the lead screw nut 10. The lead screw nut 10 is sleeved outside the lead screw 11. The lead screw 11 is connected to the shaft of the motor 12. Preferably, there are two bolts 9.

[0022] See Figure 4 , the U-shaped groove 31 is arranged on the side of the energy absorption band bracket 3 close to the collapse tube bracket 1, and the opening direction of the U-shaped groove 31 is the same as the collapse direction of the collapse tube 2. The width of the U-shaped groove 31 is greater than the tail diameter of the collapse rivet 4.

[0023] When the motor 12 is axially adjusted, due to the existence of the axial pre-tightening force, the collapse rivet 4 located in the U-shaped groove 31 will generate a frictional force between the energy absorption band bracket 3 and the collapse tube 2, so as to drive the collapse tube 2 to perform axial adjustment and play the role of axial adjustment of the pipe column. When the pipe column collapses, the collapse rivet 4 located in the U-shaped groove 31 can overcome the frictional force between the energy absorption band bracket 3 and the collapse tube 2 and break away from the opening of the U-shaped groove 31. The collapse rivet 4 located in the U-shaped groove 31 will not provide a large peak force, and the collapse peak force is only realized by another collapse rivet 4. By designing the diameter and material of this collapse rivet, the peak force of this collapse rivet is reduced, so as to further reduce the total peak force of the collapse.

[0024] The pin shaft 5 is installed in the installation hole of the collapse tube bracket 1, and the inner diameter of the installation hole is smaller than the diameter of the pin shaft 5. During assembly, the pin shaft 5 and the installation hole of the collapse tube bracket 1 are in interference fit. The energy absorption band 6 is wound around the pin shaft 5, and the inner diameter of the energy absorption band 6 is the same as the diameter of the pin shaft 5. When the motor 12 is axially adjusted, there will be no relative rotation abnormal sound between the pin shaft 5 and the collapse tube bracket 1, avoiding customer complaints. When the pipe column collapses, the energy absorption band 6 curls around the pin shaft 5, so as to provide a stable collapse force.

[0025] When the pipe column of the present utility model collapses, the motor 12 is locked, and the lead screw 11 and the lead screw nut 10 will also remain stationary, so as to pull the lead screw bracket 8 to keep it fixed. Due to the existence of the collapse force, the collapse tube 2 will generate an axial compression displacement, that is, as Figure 1In the right-to-left direction shown, when the crushing force is greater than the peak force of the crushing rivet 4, the crushing rivet 4 breaks and generates the peak force. Subsequently, the crushing tube 2 continues to crush along the same direction, driving the crushing tube bracket 1 and the pin shaft 5 to move leftward. The energy absorption belt bracket 3 is disengaged from the crushing tube 2 and is pulled in place by the lead screw bracket 8. The head of the energy absorption belt 5 is fixed to the energy absorption belt bracket 3 by the energy absorption belt rivet 7. The energy absorption belt 5 has a relative movement with the pin shaft 5, and the tail of the energy absorption belt 5 is curled through the pin shaft 5 to provide the continuous crushing force.

[0026] In the present utility model, the U-shaped groove at the bottom of the energy absorption belt bracket cooperates with the crushing rivet, reducing the initial peak force; the cooperation between the energy absorption belt and the pin shaft of the crushing tube bracket makes the crushing force during the crushing process more stable; the gaps between the energy absorption belt and the energy absorption belt bracket, the crushing rivet, and the energy absorption belt rivet avoid abnormal noises generated by part collisions during axial adjustment.

Claims

1. A collapsible structure of a steering column, comprising an energy-absorbing belt bracket, an energy-absorbing belt, a collapsible rivet, an energy-absorbing belt rivet, a pin shaft, a collapsible tube, a collapsible tube bracket, and a lead screw bracket, characterized in that: The collapsible tube bracket (1) and the energy absorber belt bracket (3) are arranged along the axial direction of the collapsible tube (2), and the collapsible tube bracket (1) is located on the side of the energy absorber belt bracket (3) away from the steering wheel. The collapsible tube bracket (1) is fixedly welded to the collapsible tube (2), and the energy absorber belt bracket (3) is connected to the collapsible tube (2) by two collapsible rivets (4). One collapsible rivet (4) is located in the U-shaped groove (31) at the bottom of the energy absorber belt bracket (3). The energy absorber belt bracket (3) is fixed to the lead screw bracket (8). The tail of the energy absorber belt (6) is located inside the energy absorber belt bracket (3). After the head of the energy absorber belt (6) bypasses the pin shaft (5) of the collapsible tube bracket (1), it is fixed to the energy absorber belt bracket (3) by an energy absorber belt rivet (7). Gaps are respectively provided between the two corresponding sides of the tail of the energy absorber belt (6) and the energy absorber belt bracket (3), between the bottom surface of the tail of the energy absorber belt (6) and the head of the collapsible rivet (4), and between the top surface of the tail of the energy absorber belt (6) and the bottom of the energy absorber belt rivet (7).

2. The collapsible structure of a steering column according to claim 1, wherein: The energy absorber belt bracket (3) and the lead screw bracket (8) are fixed by bolts (9). The lead screw bracket (8) is connected to the lead screw nut (10). The lead screw nut (10) is sleeved outside the lead screw (11), and the lead screw (11) is connected to the shaft of the motor (12).

3. The collapsible structure of a steering column according to claim 2, characterized in that: There are two bolts (9).

4. The collapsible structure of a steering column according to claim 1, characterized in that: The width of the gap is 1 mm.

5. A collapsible structure of a steering column according to claim 1, characterized in that: The U-shaped groove (31) is arranged on the side of the energy absorber belt bracket (3) close to the collapsible tube bracket (1), and the opening direction of the U-shaped groove (31) is the same as the collapse direction of the collapsible tube (2).

6. The collapsible structure of a steering column according to claim 1, characterized in that: The width of the U-shaped groove (31) is greater than the tail diameter of the collapsible rivet (4).

7. The collapsible structure of a steering column according to claim 1, wherein: The pin shaft (5) is installed in the installation hole of the collapsible tube bracket (1), and the inner diameter of the installation hole is smaller than the diameter of the pin shaft (5).

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