High-stability crumple structure for steering column

Abstract

The utility model relates to a high-stability crumple structure for a steering column. Comprising an inner column pipe, an outer column pipe, a tolerance ring, a pulling rivet and a guide nail, the tolerance ring is pressed between the inner column pipe and the outer column pipe in an interference mode, the inner end of the tolerance ring abuts against a step in the outer column pipe, a plurality of protrusions are machined on the tolerance ring, an avoiding opening is formed in the tolerance ring in the axial length direction, and the inner end of the tolerance ring abuts against a step in the outer column pipe. A guide nail is fixed to the position, corresponding to the receding opening in the tolerance ring, of the inner column pipe through a bolt, a long hole is longitudinally formed in the outer column pipe, the guide nail is arranged in the long hole and is in interference fit with the long hole, and the rivet penetrates through the outer column pipe, the receding opening in the tolerance ring and the inner column pipe to connect the outer column pipe with the inner column pipe. The crumple structure is higher in stability and has guidance quality, and the crumple force peak value can be adjusted by replacing rivets. The structure is simple, the number of parts is small, and popularization is easier.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of automobile steering column, specifically a kind of steering column with high stability collapse structure. BACKGROUND

[0002] The collapse structure of current automobile steering system is very mature, for absorbing energy in the process of vehicle collision, better protect driver. The stability of collapse, directivity, collapsible force peak adjustability is the main factor to evaluate the good and bad of automobile collapse structure. With the development of new energy vehicles, higher requirements for safety are put forward to whole vehicle, the collapse structure in prior art basically can realize the purpose of collapse energy absorption, but the stability of collapse, directivity, collapsible force peak adjustability is poor as a whole, cannot meet the requirements of new energy vehicles.

[0003] Stable collapsible force represents the high collapse safety of whole vehicle level, so each host factory proposes higher requirements to this index. Steering column supplier has tried new scheme and new idea to realize stable collapsible force integrated directivity and peak adjustability. SUMMARY

[0004] The utility model aims at providing a kind of collapse structure for steering column, and the collapse structure for steering column is higher in stability.

[0005] The technical scheme of the utility model:

[0006] A kind of collapse structure for steering column with high stability, including inner column pipe, outer column pipe, tolerance ring, rivet and guide nail, the tolerance ring is pressed into between inner column pipe and outer column pipe with interference, tolerance ring end is resisted on the step inside outer column pipe, a plurality of protrusions are processed on the tolerance ring, the axial length of tolerance ring is opened with the avoidance mouth, the guide nail is fixed with bolt on the inner column pipe corresponding the avoidance mouth position on the tolerance ring, outer column pipe is longitudinally opened with long hole, guide nail is placed in long hole and is interference fit with long hole, the rivet passes through the avoidance mouth on outer column pipe, tolerance ring and inner column pipe and connects outer column pipe and inner column pipe.

[0007] The utility model has the advantages of:

[0008] 1, the stability of the collapse structure of the application is higher, with directivity, collapsible force can be adjusted by replacing rivet collapsible force peak. Moreover, simple structure, less parts, easier to promote. BRIEF DESCRIPTION OF DRAWINGS

[0009] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only the embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of the provided drawings.

[0010] Figure 1 The figure is a schematic diagram of the overall structure of the collapsing structure of the steering column of the present application.

[0011] Figure 2 The figure is a schematic diagram of the inner column tube structure of the collapsing structure of the steering column of the present application.

[0012] Figure 3 The figure is a schematic diagram of the tolerance ring structure of the collapsing structure of the steering column of the present application.

[0013] Figure 4 The figure is a schematic diagram of the outer column tube structure of the collapsing structure of the steering column of the present application.

[0014] Figure 5 The figure is a curve diagram of the change of the process force when the inner column tube is pressed into the outer column tube with the tolerance ring.

[0015] Figure 6 The figure is a curve diagram of the change of the process force in the collapsing process of the steering column of the present application.

[0016] Reference signs:

[0017] Inner column tube 1; outer column tube 2; tolerance ring 3; rivet 4; guide pin 5; via hole 11; threaded hole 12; long hole 21; protrusion 31; avoiding opening 32. DETAILED DESCRIPTION

[0018] In order to solve the problems in the background art, the collapsing structure applied in the steering column of the present application is invented, which can solve the problems of poor collapsing stability, guiding property and adjustable peak value of collapsing force in the prior art.

[0019] The specific embodiments of the present application will be described in detail below with reference to the drawings. It should be noted that in the description of the present application, the terms "upper", "lower", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0020] A high-stability collapsible structure for a steering column comprises an inner column tube, an outer column tube, a tolerance ring, a rivet and a guide pin. The tolerance ring is interference-pressed between the inner column tube and the outer column tube. The inner end of the tolerance ring ( Figure 1 The center left side of the outer column tube rests on a step inside the outer column tube. The tolerance ring is machined with multiple protrusions, facing toward the inner column tube. A clearance opening is provided along the axial length of the tolerance ring. A guide pin is bolted to the inner column tube at a position corresponding to the clearance opening on the tolerance ring. The outer column tube has a longitudinally defined slot, and the guide pin is positioned within the slot and forms an interference fit with the slot. The rivet passes through the outer column tube, the clearance opening on the tolerance ring, and the inner column tube to connect the two tubes. The tolerance ring is made of annular spring steel.

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0022] In the existing technology, it is a common structure to realize the steering column collapse function, but the collapse stability, guidance and adjustability of the collapse force peak are poor. For example: the collapse standard can be achieved structurally and can also be achieved in the DV verification process (automotive design verification test process). Due to the lack of direct transmission of characteristics and fluctuations in material size, the samples cannot guarantee the stability of the DV stage during the mass production process of the main engine factory.

[0023] With the development of new energy vehicles, higher safety requirements are being placed on the entire vehicle. Numerous steering column collapsible structures are being developed, and new energy vehicles are placing higher demands on the stability, guidance, and adjustability of peak collapsible force. Conventional collapsible structures are affected by material and dimensional tolerances, resulting in a wide tolerance range for the collapsible force.

[0024] like Figure 1 As shown, the collapse structure of the present application includes an inner column tube 1, an outer column tube 2, a tolerance ring 3 with a ring structure having multiple protrusions 31, a rivet 4 and a guide pin 5. Figure 2 ) is a tube with a ground outer surface to ensure good finish and size. It has a through hole 11 for matching with the rivet 4 and a threaded hole 12 for matching with the guide pin. Figure 3The main structure of the body is a ring-shaped spring steel part with protrusions, and the purpose of the avoiding opening 32 is to facilitate the installation of the rivet and the guide pin. The outer column pipe 2 is a polished outer surface part to ensure good smoothness and size, and the inner cavity matched with the tolerance ring is precisely machined to ensure good smoothness and size and steps, and has a through hole 11 matched with the rivet and a long hole 21 matched with the guide pin. The rivet passes through the through hole on the inner and outer column pipes to fixedly connect the inner and outer column pipes. The technical scheme of the application increases a tolerance ring with protrusions between the inner column pipe and the outer column pipe, and the inner and outer column pipes are fixed by the rivet, and the guide pin is slid in the long hole of the outer column pipe to realize the collapse guide.

[0025] The specific scheme of the application is to ensure the matching size of the inner and outer column pipes, and the tolerance ring is pre-installed in the inner wall of the outer column pipe and limited by the step. The pressing force of the inner column pipe and the tolerance ring is monitored in the production line process, and experiments have verified that the pressing force in the production line process (see Figure 5 ) is basically the same as the pressing-out process force (see Figure 6 ). That is, the characteristics of 100% can be transmitted from the product to the process, and the consistency of the product collapse is ensured. After pressing, the rivet is installed, and the guide pin is installed, which is connected in interference fit with the long hole part of the outer column pipe. The collapse process is the pressing-out process, the inner column pipe provides a peak force by descending and cutting off the rivet of the outer column pipe, and the inner column pipe and the tolerance ring provide a stable collapse maintaining force by sliding friction. The interference connection of the guide pin and the outer column pipe provides stable guidance. The rivet is a standard rivet (the peak force can be adjusted by replacing different standard rivet specifications), and the stability is high. The inner column pipe and the outer column pipe are polished and precisely machined to ensure the stability of the size and roughness. The above scheme comprehensively realizes the stability of the collapse of the product in mass production.

[0026] The above describes the utility model and its implementation mode in a schematic manner, which is not restrictive, and the shown in the drawings is only one of the implementation modes of the utility model, and the actual structure is not limited thereto. Therefore, if a person skilled in the art is inspired thereby, and does not deviate from the technical scheme content of the utility model, and designs a similar structure mode and implementation to the above implementation examples according to the technical essence of the utility model without creativity, all should belong to the protection scope of the utility model.

Claims

1. A collapse structure for a steering column having high stability, characterized by: The application relates to a tolerance ring, which comprises an inner column pipe, an outer column pipe, a tolerance ring, a rivet and a guide pin, the tolerance ring is pressed into the inner column pipe and the outer column pipe in interference, the inner end of the tolerance ring is abutted against a step inside the outer column pipe, a plurality of protrusions are formed on the tolerance ring, an avoiding opening is formed on the axial length of the tolerance ring, the guide pin is fixed on the inner column pipe through a bolt at the position corresponding to the avoiding opening on the tolerance ring, a long hole is longitudinally formed on the outer column pipe, the guide pin is arranged in the long hole and interferes with the long hole, and the rivet passes through the outer column pipe, the avoiding opening on the tolerance ring and the inner column pipe to connect the outer column pipe and the inner column pipe.

2. The collapse structure for a steering column according to claim 1, characterized by: The tolerance ring is annular spring steel.

3. The collapse structure for a steering column according to claim 1, wherein: The protrusions on the tolerance ring are directed to the side of the inner column pipe.

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