Four-phase adjustable steering column with axial locking mechanism

Abstract

The utility model discloses a four-phase adjustable steering column with an axial locking mechanism, which comprises a steering column, a column fixing frame, a handle, a rotating shaft and a locking component, the steering column is sleeved in the column fixing frame, the outer wall of the column fixing frame is provided with a through groove, the locking component is pressed in the through groove, the locking component comprises a positive cam and a negative cam, and the positive cam and the negative cam are matched with each other. The walking face of the forward cam and the stroke face of the reverse cam are oppositely arranged, the handle is fixedly connected with the forward cam through a rotating shaft, the rotating shaft sequentially penetrates through the locking wheel set, the tubular column fixing frame and the steering tubular column, and a locking assembly is arranged between the steering tubular column and the locking assembly. According to the scheme, on the basis of original pressing combination of the locking assembly, a toothed plate combination mode is added, the occurrence time of the maximum peak force of the crumple force is earlier and more concentrated, and the safety is higher.

Description

Technical Field

[0001] The present invention relates to the field of automobile steering columns, and in particular to a four-adjustable steering column with an axial locking mechanism. Background Art

[0002] Most of the existing steering columns are four-way adjustable columns. When the cam is locked, the steering wheel is fixed to provide safe driving; when the cam is released, the steering wheel can be adjusted forward and backward, up and down. In order to achieve the excellent collapse performance while satisfying the adjustment function, a tooth-to-tooth meshing structure is designed.

[0003] When the handle is locked, the cam drives the teeth of the gear block to press against the teeth of the gear plate, realizing the collapsing function of the column, absorbing the energy of the vehicle collision and protecting the driver's safety; when the handle is released, the cam drives the teeth of the gear block away from the teeth of the gear plate, realizing the normal adjustment function. In order to improve the safety during a collision, the column can collapse immediately, and the peak collapse force of the column needs to appear immediately. Utility Model Content

[0004] In order to solve the problems existing in the above-mentioned background technology, the present invention provides a four-adjustable steering column with an axial locking mechanism, which has achieved the occurrence of the peak collapse force at the first time.

[0005] A four-way adjustable steering column with an axial locking mechanism comprises a steering column, a column fixing frame, a handle, a rotating shaft, and a locking assembly. The steering column is sleeved inside the column fixing frame, the outer wall of the column fixing frame is provided with a through groove, and the locking assembly is press-fitted into the through groove. The locking assembly comprises a positive cam and a negative cam, the running surface of the positive cam and the travel surface of the negative cam are arranged oppositely, the handle is fixedly connected to the positive cam through the rotating shaft, the rotating shaft passes through the locking wheel set, the column fixing frame, and the steering column in sequence, and a locking assembly is provided between the steering column and the locking assembly.

[0006] Furthermore, the locking assembly includes a collapse guide plate axially arranged on the side wall of the steering column, a guide groove is arranged on the collapse guide plate, and also includes a sliding tooth plate, one side of the sliding tooth plate is a convex tooth structure, and the other side is provided with a first slider and a second slider, the first slider is larger than the second slider, the guide groove is composed of a blocking groove, a buffer groove, and a positioning groove in sequence, the centers of the three are located in the same straight line, the width of the buffer groove is smaller than the diameter of the first slider and larger than the diameter of the second slider, a connecting portion is arranged between the second slider and the first slider, the second slider is arranged in the positioning groove, and the size of the first slider matches the buffer groove. Under normal conditions, the first slider and the second slider serve to assemble the sliding tooth plate on the collapse guide plate.

[0007] Furthermore, a pin hole is provided between the collapse guide plate and the sliding tooth plate, and a pin is provided in the pin hole. The collapse guide plate and the sliding tooth plate are fixedly installed as one body through the pin.

[0008] Furthermore, racks are provided on both sides of the through slot on the side wall of the column fixing frame, and a tooth plate is meshed in the racks. The back of the counter cam is clamped with the tooth plate. A connecting arm is provided at the bottom of the wheel rim of the counter cam, and a connecting tooth block is provided at the end of the connecting arm. The connecting tooth block contacts the tooth plate through the through slot.

[0009] Furthermore, the connecting tooth block includes a connecting shell, a convex tooth block is clamped in the connecting shell, and a spring is arranged between the bottom of the convex tooth block and the inner wall of the connecting shell. The convex tooth block is supported by the spring to move toward the sliding tooth plate to compensate for the meshing degree between the convex tooth block and the sliding tooth plate.

[0010] The beneficial effects of this program are as follows:

[0011] 1. This solution improves the locking structure, making the connection between the steering column and the column fixing frame tighter, and concentrating the collapse force in the collapse direction of the steering column.

[0012] 2. This solution adds a tooth plate combination mode based on the original locking assembly compression combination. The maximum peak force of the collapse force appears at the starting position of the collapse, which is safer. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the external structure of this scheme;

[0014] Figure 2 It is an enlarged view of the shaft structure of this scheme;

[0015] Figure 3 It is a schematic diagram of the locking assembly structure of this solution;

[0016] Figure 4 It is a schematic diagram of the combination of the locking assembly part;

[0017] Figure 5 It is a schematic diagram of the structure of the reverse cam part;

[0018] Figure 6 It is a schematic diagram of the internal structure of the connecting gear block.

[0019] Steering column 1, column fixing frame 2, handle 3, rotating shaft 4, locking assembly 5, through groove 6, positive cam 7, reverse cam 8, locking assembly 9, collapse guide plate 10, guide groove 11, sliding tooth plate 12, first slider 13, second slider 14, blocking groove 15, buffer groove 16, positioning groove 17, connecting part 18, pin hole 19, rack 20, tooth plate 21, connecting arm 22, connecting tooth block 23, connecting housing 24, convex tooth block 25, spring 26 DETAILED DESCRIPTION

[0020] The present invention is described in detail below with reference to the accompanying drawings

[0021] Combination Figure 1 , Figure 2 A four-way adjustable steering column 1 with an axial locking mechanism, comprising a steering column 1, a column fixing frame 2, a handle 3, a rotating shaft 4, and a locking assembly. The steering column 1 is sleeved inside the column fixing frame 2, the outer wall of the column fixing frame 2 is provided with a through groove 6, and a locking assembly is press-fitted into the through groove 6. The locking assembly comprises a positive cam 7 and a negative cam 8. The running surface of the positive cam 7 is arranged opposite to the travel surface of the negative cam 8. The handle 3 is fixedly connected to the positive cam 7 through the rotating shaft 4. The rotating shaft 4 passes through the locking wheel set, the column fixing frame 2, and the steering column 1 in sequence. A locking assembly 9 is provided between the steering column 1 and the locking assembly.

[0022] Combination Figure 3 , Figure 4 The locking assembly 9 includes a collapse guide plate 10 axially arranged on the side wall of the steering column 1, a guide groove 11 is arranged on the collapse guide plate 10, and also includes a sliding tooth plate 12, one side of the sliding tooth plate 12 is a convex tooth structure, and the other side is provided with a first slider 13 and a second slider 14, the first slider 13 is larger than the second slider 14, the guide groove 11 is composed of a blocking groove 15, a buffer groove 16, and a positioning groove 17, the centers of the three parts are located in the same straight line, the width of the buffer groove 16 is smaller than the diameter of the first slider 13 and larger than the diameter of the second slider 14, and a connecting portion 18 is arranged between the second slider 14 and the first slider 13, and the connecting portion 18 is used to increase the strength of the first slider 13 and the second slider 14 to avoid being easily broken. The second slider 14 is arranged in the positioning groove 17, and the size of the first slider 13 matches the buffer groove 16. Under normal conditions, the first slider 13 and the second slider 14 play the role of assembling the sliding tooth plate 12 on the collapse guide plate 10. The diameter of the first slider 13 is larger than the width of the blocking groove 15.

[0023] A pin hole 19 is provided between the collapse guide plate 10 and the sliding tooth plate 12, and a pin is provided in the pin hole 19. The collapse guide plate 10 and the sliding tooth plate 12 are fixedly installed as one body by the pin.

[0024] Combination Figure 5 Racks 20 are provided on both sides of the through slot 6 of the side wall of the column fixing frame 2, and a tooth plate 21 is meshed in the rack 20. The back of the counter cam 8 is engaged with the tooth plate 21. A connecting arm 22 is provided at the bottom of the wheel rim of the counter cam 8, and a connecting tooth block 23 is provided at the end of the connecting arm 22. The connecting tooth block 23 contacts with the tooth plate 21 through the through slot 6.

[0025] Combination Figure 6The connecting tooth block 23 includes a connecting housing 24, a convex tooth block 25 is clamped in the connecting housing 24, and a spring 26 is provided between the bottom of the convex tooth block 25 and the inner wall of the connecting housing 24. The convex tooth block 25 is supported by the spring 26 to move toward the sliding tooth plate 12 to compensate for the meshing degree between the convex tooth block 25 and the sliding tooth plate 12.

[0026] The scheme works as follows:

[0027] Under normal circumstances, the positive cam 7 on the handle 3 rotates, and the travel surface of the positive cam 7 and the travel surface of the reverse cam 8 pressed on the column fixing frame 2 reach the maximum stroke, and the reverse cam 8 is pressed to the right against the side wall of the column fixing frame 2. The connecting arm 22 below the reverse cam 8 is a curved arm setting, and the connecting tooth block 23 is pressed against the sliding tooth plate 12 as the reverse cam 8 is pressed, and meshes with the sliding tooth plate 12. When it is necessary to adjust the angle of the steering column 1, the handle 3 is released, the strokes of the positive cam 7 and the reverse cam 8 are minimized, a gap appears between the reverse cam 8 and the column fixing frame 2, and the steering column 1 is separated from the connecting tooth block 23, and angular and axial adjustments can be made at this time.

[0028] When a collision occurs during driving, the force generated by the collision is transmitted to the steering column 1. Since the upper part of the counter cam 8 is meshed with the column fixing frame 2 through the rack 20, and the lower part is meshed with the sliding tooth plate 12 through the connecting tooth block 23, the steering column 1 begins to collapse downward under the collision. First, the pin between the sliding tooth plate 12 and the collapse guide plate 10 is broken by the collision force, and then the second slider 14 is disengaged from the positioning groove 17, and the first slider 13 is connected to partially move toward the blocking groove 15. Since the size of the first slider 13 is larger than the width of the blocking groove 15, the first slider 13 is relatively displaced in the blocking groove 15, continuously and quickly absorbing the collision force to complete the collapse and improve safety. The second slider 14 plays a guiding role, keeping the steering column 1 continuously and stably collapsing in the direction of the movement of the blocking groove 15 and the first slider 13 and the second slider 14.

[0029] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A four-way adjustable steering column with an axial locking mechanism, comprising a steering column, a column fixing frame, a handle, a rotating shaft, and a locking assembly. The steering column is sleeved inside the column fixing frame, the outer wall of the column fixing frame is provided with a through groove, and the locking assembly is pressed into the through groove. The locking assembly comprises a positive cam and a negative cam, the running surface of the positive cam is arranged opposite to the travel surface of the negative cam, the handle is fixedly connected to the positive cam through the rotating shaft, and the rotating shaft passes through the locking wheel set, the column fixing frame, and the steering column in sequence, characterized in that: A locking assembly is provided between the steering column and the locking assembly.

2. A four-adjustable steering column with an axial locking mechanism as claimed in claim 1, characterized in that: The locking assembly includes a collapse guide plate axially arranged on the side wall of the steering column, a guide groove is provided on the collapse guide plate, and also includes a sliding tooth plate, one side of the sliding tooth plate is a convex tooth structure, and the other side is provided with a first slider and a second slider, the first slider is larger than the second slider, the guide groove is composed of a blocking groove, a buffer groove, and a positioning groove in sequence, the centers of the three are located in the same straight line, the width of the buffer groove is smaller than the diameter of the first slider and larger than the diameter of the second slider, a connecting portion is provided between the second slider and the first slider, the second slider is arranged in the positioning groove, and the size of the first slider matches the buffer groove.

3. A four-way adjustable steering column with an axial locking mechanism as claimed in claim 2, characterized in that: A penetrating pin hole is also provided between the collapse guide plate and the sliding tooth plate, and a pin is provided in the pin hole.

4. A four-way adjustable steering column with an axial locking mechanism as claimed in claim 1, characterized in that: Racks are provided on both sides of the through slot on the side wall of the column fixing frame, and tooth plates are meshed in the racks. The back of the counter cam is clamped with the tooth plate. A connecting arm is provided at the bottom of the wheel rim of the counter cam, and a connecting tooth block is provided at the end of the connecting arm. The connecting tooth block contacts the tooth plate through the through slot.

5. A four-adjustable steering column with an axial locking mechanism as claimed in claim 4, characterized in that: The connecting tooth block comprises a connecting shell, a convex tooth block is clamped in the connecting shell, and a spring is arranged between the bottom of the convex tooth block and the inner wall of the connecting shell.

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