Special-shaped crumple connecting mechanism of electric adjusting steering column

Abstract

The utility model discloses a special-shaped crumple connecting mechanism of an electric adjusting steering column, which comprises a motor, the motor is connected with a steering outer tube of the electric adjusting steering column through a motor mounting bracket, a steering inner tube capable of axially moving is coaxially mounted in the steering outer tube, the output end of the motor is connected with a screw rod, a nut is mounted on the screw rod, and the motor is connected with a motor. The nut is connected with the steering inner pipe through a connecting support, a crumple belt is arranged on the side wall of the steering inner pipe in a penetrating mode, a crumple guide block is arranged at the position, corresponding to the crumple belt, of the steering inner pipe, and the first end of the crumple belt is connected with the connecting support. The second end of the crumple belt firstly extends in the direction of the motor in the axial direction of the steering inner pipe, then is bent to bypass the crumple guide block and then axially extends in the direction away from the motor. The crumple structure can solve the problems that a crumple structure of an existing electric adjusting steering column is complex in connection, noise is prone to being generated in the using process, and the assembly technology is complex.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of automobile electric adjustable steering column, concretely is a special-shaped collapse connecting mechanism of electric adjustable steering column. BACKGROUND

[0002] With the development of the electrification of the automobile industry, the safety and comfort requirements of automobiles are constantly improving, and the mechanical column in the steering system is also innovated towards electrification, from the original manual adjustment to electric adjustment, and the electric adjustable steering column (EASC) gradually becomes the standard configuration of high-end vehicles. The device allows the driver to adjust the height and angle of the steering wheel through the motor drive to achieve personalized driving posture. However, when the vehicle is in a collision, the collapse energy absorption performance of the steering column is directly related to the risk of injury to the driver's chest and head. Therefore, how to integrate the electric adjustment function while ensuring the efficiency and reliability of the collapse mechanism has become a key technical challenge in the field of automobile passive safety.

[0003] Currently, the technical scheme of the electric adjustable steering column generally connects the collapse mechanism, the drive structure and the inner tube movement mechanism. When powered on, the drive mechanism drives the collapse mechanism to move together. However, in order to meet the adjustment function and stability of the electric adjustable steering column, the connection relationship between the collapse mechanism, the drive structure and the inner tube movement mechanism is relatively complex, which leads to the overall complexity of the collapse structure, the tedious assembly work, and the generation of unexpected noise during the working process, affecting the quiet performance of the automobile. Utility model content

[0004] The utility model provides a special-shaped collapse connecting mechanism of electric adjustable steering column, which can solve the problems of complex collapse structure connection of the existing electric adjustable steering column, easy generation of noise during use, and complex assembly process.

[0005] In order to achieve the above object, the utility model provides the following technical scheme: a special collapse connecting mechanism of electrically adjusted steering column, including motor, the motor is connected with the steering outer tube of electrically adjusted steering column through motor installation support, the inside coaxial installation of steering outer tube has the steering inner tube that can axial movement, the output of motor is connected with screw rod, the nut is installed on the screw rod, the nut is connected with the steering inner tube through the connecting support, the side wall of steering inner tube is provided with collapse zone through setting, the position of steering inner tube is provided with collapse guide block corresponding with collapse zone, the first end of collapse zone is connected with connecting support, the second end of collapse zone first extends to the motor direction along the steering inner tube axial and then is bent and passes through collapse guide block and then extends to the direction of far away from motor axial, adopts the special collapse zone that extends from outside to inside, compared with the collapse connecting mechanism of the part of collapse of the friction of metal guide rail is less, and collapse zone and collapse guide block cooperate and realize that collapse zone and steering inner tube do not directly contact, reduce the generation of heterophonic, through connecting support, collapse zone and nut can be connected, and the installation structure of collapse zone is reduced.

[0006] As preferred, the connecting support is fixedly connected with the steering inner tube through at least two first rivets, and the collapse guide block is fixedly connected with the steering inner tube through at least one second rivet, so that assembly is simple, the first rivet is preferentially broken during collapse, the peak value of collapse force is reached, and a buffering effect is generated for deformation of the collapse zone.

[0007] As preferred, the first end of the collapse zone is connected with the connecting support through at least two connecting bolts, so that multiple components can be connected through the connecting bolts, the connecting structure is simplified, and the risk that noise is caused by force transmission between multiple parts can be avoided.

[0008] As preferred, the connecting support includes auxiliary connecting supports and a main connecting support located on the upper and lower sides of the nut respectively, the first end of the collapse zone extends into the auxiliary connecting supports and the main connecting support, and the connecting bolts pass through the auxiliary connecting supports, the collapse zone and the main connecting support in sequence to be fixed, so that the nut can be conveniently assembled in advance through the two auxiliary connecting supports and the main connecting support, and unified connection is achieved through the connecting bolts, thereby reducing assembly process difficulty.

[0009] As preferred, the first end of the collapse zone is provided with a connecting frame with a rectangular cross section, the connecting frame is clamped between the auxiliary connecting supports and the main connecting support, and the connecting bolts pass through the auxiliary connecting supports, the connecting frame and the main connecting support in sequence to be fixed, so that the connecting frame can effectively fill the space between the auxiliary connecting supports and the main connecting support, compactness of the connecting structure is improved, connection firmness is improved, and generation of noise is reduced.

[0010] As preferred, the collapse guide block is in U shape as a whole, one side of which forms a slot, and the side wall of the turning inner tube is embedded into the slot for fixation, facilitating the cooperation and positioning between the collapse guide block and the turning inner tube, and preventing the collapse belt from colliding with the turning inner tube.

[0011] As preferred, the part of the collapse guide block inside the turning inner tube is provided with a through guide slot along the axial direction of the turning inner tube, and the collapse belt passes through the through guide slot, and the cooperation between the through guide slot and the collapse belt can prevent the collapse belt from deviating when being straightened during collapse.

[0012] As preferred, the side wall of the turning outer tube is provided with an axially extending guide slot, the width of the guide slot matches the width of the collapse guide block, the connecting support passes through the guide slot and is connected with the turning inner tube, and the cooperation between the guide slot and the collapse guide block can play a guiding role when the axial position of the turning inner tube is adjusted.

[0013] As preferred, the connecting support, the turning inner tube, the turning outer tube and the nut are in the same horizontal plane, reducing the risk of abnormal sound during adjustment.

[0014] As preferred, the part of the collapse belt inside the turning inner tube and the middle part of the part cooperating with the collapse guide block are provided with a hollow slot extending along the length direction, so that the collapse belt can be easily straightened when moving in the turning inner tube and will not be stuck.

[0015] Compared with the prior art, the utility model has the advantages that:

[0016] The special-shaped collapse belt extending from outside to inside has less parts than the collapse connection structure using metal guide rail friction collapse, the collapse belt cooperates with the collapse guide block to prevent direct contact between the collapse belt and the turning inner tube, reduce abnormal sound, the connecting support can connect the collapse belt with the nut, reducing the separate installation structure of the collapse belt, the turning outer tube structure is used as the guide rail for telescopic adjustment, the telescopic sliding guide rail part can be omitted, the assembly rhythm is reduced, the collapse connection structure is mainly made of sheet metal parts, the processing technology is relatively simple, and the cost is low, achieving excellent effect while reducing cost. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a perspective view of the utility model;

[0018] Figure 2 is an exploded perspective view of the utility model;

[0019] Figure 3 is Figure 1A-A sectional view structure diagram of the utility model;

[0020] Figure 4 As Figure 3 B enlarged structure diagram at the place of the utility model;

[0021] Figure 5 It is the first perspective solid structure diagram of the utility model's collapse connecting structure;

[0022] Figure 6 It is the second perspective solid structure diagram of the utility model's collapse connecting structure.

[0023] Reference signs:

[0024] 1, steering inner tube, 11, first rivet, 12, second rivet, 13, screw rod, 2, steering outer tube, 21, guide slot, 3, motor, 4, nut, 5, main connecting support, 6, collapse belt, 61, connecting frame, 62, hollow slot, 7, collapse guide block, 71, embedding groove, 72, through connecting guide slot, 8, auxiliary connecting support, 9, connecting bolt, 10, motor mounting support. DETAILED DESCRIPTION

[0025] The technical scheme in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model.

[0026] As Figures 1-6 shown, the utility model discloses to solve the existing electrically adjusted steering column's collapse structure connection complex, in the use process, the problem that the noise is easily produced, the assembly technology is complex.Provide the following technical scheme: a kind of electrically adjusted steering column's special-shaped collapse connecting mechanism, including motor 3, the motor 3 is connected with the steering outer tube 2 of electrically adjusted steering column by motor mounting support 10, the inside coaxial installation of the steering outer tube 2 has the steering inner tube 1 that can be axially moved, the output end of the motor 3 is connected with screw rod 13, the screw rod 13 is installed with nut 4, the nut 4 is connected with steering inner tube 1 by connecting support, the side wall of the steering inner tube 1 is provided with collapse belt 6, the steering inner tube 1 is provided with collapse guide block 7 in the position corresponding to collapse belt 6, the first end of the collapse belt 6 is connected with connecting support, the second end of the collapse belt 6 is first extended to the direction of motor 3 along the steering inner tube 1 axially and then bent and extended to the direction of motor 3 away axially after passing through collapse guide block 7, adopt the special-shaped collapse belt 6 that extends from outside to inside, compared with the collapse connecting structure of the part less that the collapse belt 6 is cooperated with collapse guide block 7 and realizes that the collapse belt 6 and steering inner tube 1 do not directly contact, reduce the generation of abnormal sound, through connecting support, the collapse belt 6 can be connected with nut 4, reduce the installation structure of collapse belt 6 alone.

[0027] Specifically, the collapse belt 6 can be arranged at one end of the steering inner tube 1, or a hollow part can be opened on the side wall of the steering inner tube 1 for mounting the collapse belt 6 and the collapse guide block 7, and the connecting bracket is fixedly connected with the steering inner tube 1. When the steering inner tube 1 is normally adjusted to the height of the steering wheel, the motor 3 drives the screw rod 13 to rotate, thereby driving the nut 4 to move axially, and the connecting bracket can drive the collapse belt 6, the collapse guide block 7 and the steering inner tube 1 to move synchronously. In this adjustment process, the connecting bracket, the steering inner tube 1, the steering outer tube 2 and the center line of the nut 4 are in the same horizontal plane, and the stress generated in the starting moment of the telescopic motor 3 can be released in the telescopic adjustment process, and the motor starting noise can be effectively reduced.

[0028] The motor mounting bracket 10 is rotatably connected with the motor 3 and the steering outer tube 2, so that the axial movement of the nut 4 is more flexible when the screw rod 13 rotates.

[0029] In order to save the guide rail structure for the axial adjustment of the steering inner tube 1, an axially extending guide slot 21 is arranged on the side wall of the steering outer tube 2, the width of the guide slot 21 matches the width of the collapse guide block 7, the connecting bracket passes through the guide slot 21 and is connected with the steering inner tube 1, and the cooperation of the guide slot 21 and the collapse guide block 7 can play a guiding role when the steering inner tube 1 is axially adjusted. The design utilizes the structure of the steering outer tube 2 as the telescopic adjustment guide rail, which can save the design of the telescopic sliding guide rail part and reduce the assembly rhythm of the assembly.

[0030] When collapsing, the connecting point between the connecting bracket and the steering inner tube 1 will first bear the impact force and fail, and then the steering inner tube 1 continues to move axially to make the collapse guide block 7 act on the collapse belt 6, thereby straightening the collapse belt 6 and generating a continuous energy absorption effect.

[0031] As a connection mode of the connecting point between the connecting bracket and the steering inner tube 1, the connecting bracket is fixedly connected with the steering inner tube 1 through at least two first rivets 11, and the collapse guide block 7 is fixedly connected with the steering inner tube 1 through at least one second rivet 12. The assembly is simple, the first rivet 11 is preferentially broken during the collapse, the collapse force reaches a peak value, and a buffering effect is generated for the deformation of the collapse belt 6. The diameter of the first rivet 11 can be smaller than that of the second rivet 12, and the cost is relatively low.

[0032] In order to simplify the connection and fixing structure between the collapse belt 6 and the connecting bracket, the first end of the collapse belt 6 is connected with the connecting bracket through at least two connecting bolts 9. The connecting bolts 9 can realize the connection of multiple components, simplify the connection structure, and avoid the risk of noise caused by force transmission between multiple parts.

[0033] In the embodiment, asFigure 2 As shown in the figure, the connecting bracket includes auxiliary connecting brackets 8 and main connecting brackets 5 on the upper and lower sides of the nut 4 respectively, the first end of the collapse belt 6 extends into the auxiliary connecting bracket 8 and the main connecting bracket 5, and the connecting bolt 9 is sequentially fixed through the auxiliary connecting bracket 8, the collapse belt 6 and the main connecting bracket 5, thereby facilitating the pre-assembly with the nut 4 through the two auxiliary connecting brackets 8 and the main connecting bracket 5, and the unified connection through the connecting bolt 9, and the assembly process difficulty is reduced, wherein the main connecting bracket 5 is L-shaped, the horizontal part of the main connecting bracket 5 is provided with a positioning hole corresponding to the nut 4, the auxiliary connecting bracket 8 is flat, the auxiliary connecting bracket 8 and the main connecting bracket 5 clamp the nut 4 from the upper and lower sides, and the butt joint position between the auxiliary connecting bracket 8 and the main connecting bracket 5 can be connected through welding, and the assembly is integrated.

[0034] In the embodiment, the first end of the collapse belt 6 is provided with a connecting frame 61 with a rectangular cross section, the connecting frame 61 is clamped between the auxiliary connecting bracket 8 and the main connecting bracket 5, and the connecting bolt 9 is sequentially fixed through the auxiliary connecting bracket 8, the connecting frame 61 and the main connecting bracket 5, so that the connecting frame 61 can effectively fill the space between the auxiliary connecting bracket 8 and the main connecting bracket 5, the compactness of the connecting structure is improved, the connection firmness is improved, and the generation of abnormal sound is reduced.

[0035] In the embodiment, as shown in the figure, Figures 5-6 As shown in the figure, the collapse guide block 7 is U-shaped as a whole, one side of the collapse guide block 7 forms an embedding groove 71, the side wall of the turning inner tube 1 is embedded into the embedding groove 71 for fixation, thereby facilitating the cooperation positioning between the collapse guide block 7 and the turning inner tube 1, and being conducive to preventing the collapse belt 6 from colliding with the turning inner tube 1, wherein the part of the collapse guide block 7 located on the inner side of the turning inner tube 1 is provided with a penetrating guide through groove 72 along the axial direction of the turning inner tube 1, the collapse belt 6 penetrates through the penetrating guide through groove 72, and the cooperation between the penetrating guide through groove 72 and the collapse belt 6 can prevent the collapse belt 6 from deviating when being straightened during the collapse.

[0036] In the embodiment, as shown in the figure, Figures 5-6 As shown in the figure, the part of the collapse belt 6 located inside the turning inner tube 1 and the middle part of the part cooperating with the collapse guide block 7 are provided with a hollow groove 62 extending along the length direction, so that the collapse belt 6 is easily straightened when moving in the turning inner tube 1 during the collapse, and the collapse belt 6 will not be stuck.

[0037] It should be noted that all the directionality indications (such as up, down, left, right, front, back, etc.) in the embodiments of the utility model are only used to explain the relative positional relationship, movement condition and the like between the components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directionality indications also change accordingly.

[0038] In addition, the descriptions such as "first", "second" and the like in the present application are only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the technical features or implying the number of the technical features indicated. Therefore, the features defined as "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "multiple" is at least two, for example, two, three, etc., unless otherwise specifically defined.

[0039] In the present application, unless otherwise specifically defined and limited, the terms "connection", "fixing" and the like should be understood broadly, for example, "fixing" can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection; can be directly connected, or indirectly connected through intermediate medium; can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise specifically limited. 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.

[0040] In addition, the technical solutions of each embodiment of the present application can be combined with each other, but it must be based on the realization of the ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor within the scope of protection required by the present application.

Claims

1. A collapsible connection mechanism for an electrically adjustable steering column, comprising a motor (3), wherein the motor (3) is connected to an outer steering tube (2) of the electrically adjustable steering column via a motor mounting bracket (10), an axially movable inner steering tube (1) is coaxially mounted inside the outer steering tube (2), a lead screw (13) is connected to the output end of the motor (3), and a nut (4) is mounted on the lead screw (13), characterized in that, The nut (4) is connected to the steering inner tube (1) through the connecting bracket. A crumple zone (6) is provided through the side wall of the steering inner tube (1). A crumple guide block (7) is provided on the steering inner tube (1) at the position corresponding to the crumple zone (6). The first end of the crumple zone (6) is connected to the connecting bracket. The second end of the crumple zone (6) first extends axially along the steering inner tube (1) towards the motor (3), then bends and passes around the crumple guide block (7), and then extends axially away from the motor (3).

2. The non-circular collapsible connection mechanism of the electrically adjustable steering column according to claim 1, characterized in that: The connecting bracket is fixedly connected to the steering inner tube (1) by at least two first rivets (11), and the collapsible guide block (7) is fixedly connected to the steering inner tube (1) by at least one second rivet (12).

3. The non-circular collapsible connection mechanism for the electrically adjustable steering column according to claim 2, characterized in that: The first end of the collapse band (6) is connected to the connecting bracket by at least two connecting bolts (9).

4. The non-circular collapsible connection mechanism for the electrically adjustable steering column according to claim 3, characterized in that: The connecting bracket includes an auxiliary connecting bracket (8) and a main connecting bracket (5) located on the upper and lower sides of the nut (4) respectively. The first end of the collapsible band (6) extends between the auxiliary connecting bracket (8) and the main connecting bracket (5). The connecting bolt (9) passes through the auxiliary connecting bracket (8), the collapsible band (6) and the main connecting bracket (5) in sequence for fixing.

5. The non-collapsible connection mechanism for the electrically adjustable steering column according to claim 4, characterized in that: The first end of the collapse band (6) is provided with a rectangular cross-section connecting frame (61). The connecting frame (61) is sandwiched between the auxiliary connecting bracket (8) and the main connecting bracket (5). The connecting bolt (9) passes through the auxiliary connecting bracket (8), the connecting frame (61) and the main connecting bracket (5) in sequence for fixation.

6. The non-circular collapsible connection mechanism for the electrically adjustable steering column according to claim 1, characterized in that: The collapse guide block (7) is U-shaped, with a groove (71) formed on one side. The side wall of the steering inner tube (1) is embedded in the groove (71) for fixation.

7. The non-collapsible connection mechanism for the electrically adjustable steering column according to claim 6, characterized in that: The portion of the collapsible guide block (7) located inside the steering inner tube (1) is provided with a through guide groove (72) along the axial direction of the steering inner tube (1), and the collapsible band (6) passes through the through guide groove (72).

8. The non-circular collapsible connection mechanism for the electrically adjustable steering column according to claim 6, characterized in that: The outer steering tube (2) has an axially extending guide slot (21) on its side wall. The width of the guide slot (21) matches the width of the collapsible guide block (7). The connecting bracket passes through the guide slot (21) and is connected to the inner steering tube (1).

9. The non-circular collapsible connection mechanism for the electrically adjustable steering column according to any one of claims 1-8, characterized in that: The center lines of the connecting bracket, the inner steering tube (1), the outer steering tube (2), and the nut (4) are on the same horizontal plane.

10. The non-collapsible connection mechanism for the electrically adjustable steering column according to claim 9, characterized in that: The portion of the collapsible band (6) located inside the inner tube (1) and the portion that mates with the collapsible guide block (7) are provided with a hollow groove (62) extending along its length.

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