An integrated collapsing system for a steering column

Abstract

The application provides a kind of integrated collapse system of steering column, including column pipe and support sleeve, column pipe is installed in support sleeve, one side of column pipe is provided with C type support block group, riveting energy-absorbing sheet is arranged on C type support block group, rack is installed on the outside of energy-absorbing sheet;Handle is installed on one side of support sleeve, handle shaft is arranged on handle, cam block is sleeved on handle shaft, the section of handle shaft is same with the shape of through hole of cam block to ensure its close fit, cam block is arranged in the inside of tooth stone, wherein the two sides of tooth stone are in contact with support sleeve, the bottom end of tooth stone is in contact with support sleeve through elastic element, the upper end tooth shape part of tooth stone is matched with rack through the extrusion of elastic element.The application integrates collapse structure on the column pipe of steering column, adjusts the length of column pipe while opening and closing handle, and also provides collapse force, the structure arrangement is reasonable, and the space utilization is high.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of automobile parts, and particularly relates to a collapsing system of an integrated steering column. BACKGROUND

[0002] The steering column is one of the most basic components of the automobile EPS and is an important accessory on the automobile, which determines the reliability and safety of the automobile in driving. According to the statistical data of the Ministry of Communications and the research on the automobile collision test, when the automobile collides frontally, 46% of the driver injuries are caused by the steering mechanism such as the steering wheel, the steering column and the steering gear. With the development of the automobile industry, the performance requirements of the design are higher and higher. The steering column is mainly used to support the steering wheel and the transmission shaft, and the collapsing energy absorption performance is also more and more important. When the automobile collides in traffic, especially in the frontal collision accident, the driver often inclines forward due to inertia, so that the distance between the chest and the steering wheel is suddenly reduced, and the driver's chest may collide with the steering wheel and be injured. In addition, the space occupied by the deployment of the safety airbag in the steering wheel will further increase the impact force of the driver's chest. In order to reduce the impact force borne by the driver's chest, many automobiles can be collapsed by two to three sections when the steering column is impacted, so as to increase the space of the driver's cabin and reduce the damage transmitted from the steering column to the human body due to the impact.

[0003] In order to realize such energy absorption function, various methods have been introduced, for example, CN205952053U discloses an automobile steering column collapse system, and CN111295323A discloses a collapse type steering column assembly, which have the common features of complex structure and large space occupation, and cannot meet the current demand of simplifying function structure and optimizing in-car space. CN212172339U discloses a simple structure steering column collapse structure, which specifically comprises a toothed sheet, a toothed stone and a handle, the toothed sheet is installed on the column pipe, a toothed sheet cover is arranged above the toothed sheet, the toothed sheet cover is installed on an aluminum shell, the aluminum shell is sleeved on the column pipe, a toothed stone cover is arranged at the top end of the toothed sheet cover, the toothed stone is arranged above the toothed sheet and below the toothed stone cover, a connecting pin is installed on the toothed stone, the connecting pin passes through the toothed stone cover, springs I and II are arranged above and below the connecting pin respectively, the handle is arranged at the top end of the aluminum shell and connected with the aluminum shell through a shaft, when the handle is closed, the handle presses the connecting pin, so that the toothed stone is engaged with the toothed sheet downward, when the handle is opened, the downward force applied to the connecting pin by the handle is reduced or disappears, the connecting pin drives the toothed stone to lift upward, so that the toothed stone and the toothed sheet are separated. However, the toothed sheet is directly connected with the column pipe, which is easy to cause damage to the column pipe when the toothed sheet is subjected to collapse force, and the toothed sheet cover needs to be installed on the toothed sheet, which occupies a certain space. The limiting is realized by extruding the connecting pin with the handle to make the toothed stone engage with the toothed strip, which requires high precision and increases the cost, and when the handle is frequently turned, the handle and the handle shaft will be loose, the handle will deviate outward, which will cause the toothed stone to suddenly separate from the engagement of the toothed strip, and cause certain risk to safe driving. SUMMARY

[0004] To solve the problems in the background art, the present application provides an integrated steering column collapse system.

[0005] The technical scheme of the present application is as follows:

[0006] The integrated collapse system of steering column comprises a column pipe and a supporting sleeve, characterized in that the column pipe is installed in the supporting sleeve, one side of the column pipe is provided with a C-shaped supporting block group, the C-shaped supporting block group comprises a wide-end C-shaped supporting block and a narrow-end C-shaped supporting block welded on the column pipe; energy-absorbing sheets are riveted on the C-shaped supporting block group, the energy-absorbing sheets comprise long-end energy-absorbing sheets and short-end energy-absorbing sheets, the short-end energy-absorbing sheets are arranged in parallel to the long-end energy-absorbing sheets, the short-end energy-absorbing sheets are installed on the narrow-end C-shaped supporting block, the long-end energy-absorbing sheets are installed on the wide-end C-shaped supporting block, and a rack is installed on the outer side of the long-end energy-absorbing sheets; a handle is installed on one side of the supporting sleeve, the handle is provided with a handle shaft, a cam block is sleeved on the handle shaft, the cross section of the handle shaft is the same as the shape of the through hole of the cam block to ensure that they are tightly matched, the cam block is arranged in a toothed stone, the toothed stone comprises an upper-end toothed part and an internal limiting area, the toothed stone is arranged in a groove formed on the other side of the supporting sleeve, wherein the two sides of the toothed stone are in contact with the supporting sleeve, the bottom end of the toothed stone is in contact with the supporting sleeve through an elastic element, and the upper-end toothed part of the toothed stone is matched with the rack through the extrusion of the elastic element; and the end of the handle shaft is installed on the supporting sleeve through a connecting element.

[0007] As a preferred embodiment of the present application, the handle shaft is press-fitted in the mounting hole of the handle.

[0008] As a preferred embodiment of the present application, the cross section of the handle shaft is square, and the through hole in the cam block is also square.

[0009] As a preferred embodiment of the present application, the elastic element is an arc-shaped elastic sheet.

[0010] The present application has the following advantages:

[0011] (1) The integrated collapse system of steering column provided by the present application integrates the collapse structure on the column pipe of the steering column, adjusts the length of the column pipe when the handle is opened or closed, and also provides collapse force, so that the structure is reasonably arranged and the space utilization rate is high.

[0012] (2) The integrated collapse system of steering column provided by the present application, wherein the energy-absorbing sheets are connected with the column pipe through the C-shaped supporting block group, the structure of the energy-absorbing sheets can generate a certain collapse force, the safety performance is increased, and in addition, since the energy-absorbing sheets are indirectly connected with the column pipe through the C-shaped supporting block group, the damage degree of the column pipe is reduced to a certain extent when collapse occurs.

[0013] (3) The integrated collapse system of steering column provided by the present application, wherein the toothed stone is sleeved on the handle shaft, and the handle and the handle shaft are matched in an interference fit, so that the damage caused by looseness is avoided.

[0014] (4) The integrated collapse system of the steering column provided by the application has simple structure and convenient operation. When the handle is in the closed state, the cam block is at a corner of the internal limiting area, the tooth stone is always matched with the tooth piece by the supporting action of the elastic member, and the column pipe is in the locked state. When the handle is in the open state, the cam block is rotated under the driving of the handle shaft, and the tooth stone is pressed downward to be separated from the rack, so that the column pipe is in the unlocked state, and the length adjustment of the column pipe can be realized. When the steering column collapses, the collapse force can be generated by the deformation of the elastic piece, the deformation of the energy-absorbing piece and the deformation of the C-shaped supporting block, so that the harm of the steering wheel to the driver in the front collision accident of the automobile is reduced or avoided. BRIEF DESCRIPTION OF DRAWINGS

[0015] Other objects and results of the present application will be more apparent and easily understood through the following description with reference to the accompanying drawings, and with the more comprehensive understanding of the present application. In the drawings:

[0016] Figure 1 It is a schematic diagram of the overall structure of the present application.

[0017] Figure 2 It is a schematic diagram of the structure of the support sleeve in the present application.

[0018] Figure 3 It is a schematic diagram of the structure of the column pipe in the present application.

[0019] Figure 4 It is a schematic diagram of the structure of the energy-absorbing piece in the present application.

[0020] Figure 5 It is a schematic diagram of the structure of the handle and handle shaft in the present application.

[0021] Figure 6 It is a schematic diagram of the structure of the tooth stone in the present application.

[0022] Figure 7 It is a schematic diagram of the structure of the present application after the support sleeve is hidden.

[0023] Figure 8 It is a local view of the cooperation between the tooth stone and the tooth piece after the handle is closed in the present application.

[0024] Figure 9 It is a local view of the cooperation between the tooth stone and the tooth piece after the handle is opened in the present application.

[0025] The reference signs in the drawings are as follows: column pipe 1, support sleeve 2, C-shaped supporting block group 3, wide-end C-shaped supporting block 31, narrow-end C-shaped supporting block 32, energy-absorbing piece 4, long-end energy-absorbing piece 41, short-end energy-absorbing piece 42, rack 5, handle 6, handle shaft 7, cam block 8, tooth stone 9, upper-end tooth-shaped part 91, internal limiting area 92, recess 21, elastic member 10. DETAILED DESCRIPTION

[0026] In order to enable a person skilled in the art to better understand the technical solutions of the present application and their advantages, the present application will be described in detail below with reference to the drawings, but is not used to limit the protection scope of the present application.

[0027] In the description of the present application, it should be noted that the terms "in", "under", etc. indicate the orientation or positional relationship: based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly used when the product of the present application is placed, only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", etc. are only used for differentiation and cannot be understood as indicating or implying relative importance.

[0028] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "set", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, it can be directly connected, or indirectly connected through an intermediate medium, it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0029] Referring to Figure 1 , an integrated type of a collapse system of a steering column, comprising a column pipe 1 and a support sleeve 2, the column pipe 1 is installed in the support sleeve 2, one side of the column pipe 1 is provided with a C-shaped support block group 3.

[0030] Referring to Figure 3 and Figure 4 , the C-shaped support block group 3 comprises a wide-end C-shaped support block 31 and a narrow-end C-shaped support block 32 welded on the column pipe 1; the C-shaped support block group 3 is riveted with an energy-absorbing sheet 4, the energy-absorbing sheet 4 comprises a long-end energy-absorbing sheet 41 and a short-end energy-absorbing sheet 42, the short-end energy-absorbing sheet 42 is arranged parallel to the long-end energy-absorbing sheet 41, the short-end energy-absorbing sheet 42 is installed on the narrow-end C-shaped support block 32, the long-end energy-absorbing sheet 41 is installed on the wide-end C-shaped support block 31, the outside of the long-end energy-absorbing sheet 41 is installed with a rack 5.

[0031] Referring to Figure 1 , one side of the support sleeve 2 is installed with a handle 6, the handle 6 is provided with a handle shaft 7 (see Figure 5 ), the handle shaft 7 is sleeved with a cam block 8 (see Figure 7 ), the cross section of the handle shaft 7 is the same as the shape of the through hole of the cam block 8 to ensure that they are tightly matched, the cam block 8 is arranged inside the toothed stone 9 (see Figure 8), the tooth stone 9 includes an upper end tooth shape part 91 and an internal limiting area 92 (see Figure 6 ), the tooth stone 9 is arranged in the groove 21 opened on the other side of the support sleeve 2 (see Figure 2 ), wherein the two sides of the tooth stone 9 are in contact with the support sleeve 2, the bottom end of the tooth stone 9 is in contact with the support sleeve 2 through the elastic member 10 (see Figure 8 ), the upper end tooth shape part 91 of the tooth stone 9 is matched with the rack 5 through the extrusion of the elastic member 10; the end of the handle shaft 7 is installed on the support sleeve 2 through the connecting member.

[0032] Further, the length of the short end energy absorbing sheet 42 is not greater than the length of the narrow end C-shaped support block 32.

[0033] Further, the handle shaft 7 is press-fitted in the mounting hole of the handle 6.

[0034] Further, the cross section of the handle shaft 7 is square, and the through hole in the cam block 8 is also square.

[0035] The working process of the present application will be described below with reference to the accompanying drawings:

[0036] Referring to Figure 8 : when the handle 6 is in the closed state, the cam block 8 is at a corner of the internal limiting area 92, the tooth stone 9 is always matched with the rack 5 by the supporting action of the elastic member 10, and the column pipe 1 is in the locked state;

[0037] Referring to Figure 9 : when the handle 6 is in the open state, the cam block 8 is rotated under the driving of the handle shaft 7, and presses the tooth stone 9 downward to be separated from the rack 5, so that the column pipe 1 is in the unlocked state, and at this time, the length adjustment of the column pipe 1 can be realized;

[0038] When the steering column collapses, the collapse force can be changed through the deformation of the elastic member 10 and the deformation of the energy absorbing sheet 4, so as to reduce or avoid the harm of the steering wheel to the driver in the front collision accident.

[0039] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited to this, any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A collapsing system for an integrated steering column comprising a column tube and a support sleeve, characterised in that: The column pipe is installed in a supporting sleeve, one side of the column pipe is provided with a C-shaped supporting block group, the C-shaped supporting block group comprises a wide-end C-shaped supporting block and a narrow-end C-shaped supporting block welded on the column pipe; an energy-absorbing sheet is riveted on the C-shaped supporting block group, the energy-absorbing sheet comprises a long-end energy-absorbing sheet and a short-end energy-absorbing sheet, the short-end energy-absorbing sheet is arranged parallel to the long-end energy-absorbing sheet, the short-end energy-absorbing sheet is installed on the narrow-end C-shaped supporting block, the long-end energy-absorbing sheet is installed on the wide-end C-shaped supporting block, a rack is installed on the outer side of the long-end energy-absorbing sheet; one side of the supporting sleeve is provided with a handle, the handle is provided with a handle shaft, a cam block is sleeved on the handle shaft, the cross section of the handle shaft is the same as the shape of the through hole of the cam block to ensure that they are tightly matched, the cam block is arranged in a toothed stone, the toothed stone comprises an upper end toothed part and an internal limiting area, the toothed stone is arranged in a groove opened on the other side of the supporting sleeve, wherein the two sides of the toothed stone are in contact with the supporting sleeve, the bottom end of the toothed stone is in contact with the supporting sleeve through an elastic member, the upper end toothed part of the toothed stone is matched with the rack through the extrusion of the elastic member; the end of the handle shaft is installed on the supporting sleeve through a connecting member; The handle shaft is pressed into the mounting hole of the handle through interference; The elastic member is an arc-shaped elastic sheet.

2. A collapsing system for an integrated steering column according to claim 1, wherein: The cross section of the handle shaft is square, and the through hole in the cam block is also square.

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