Axial adjustment damping connection structure of electric adjustment steering column

Abstract

The utility model discloses an axial adjustment shock absorption connecting structure of an electric adjustment steering column, which comprises a motor, the motor is connected with a shell of the electric adjustment steering column through a mounting pin, 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 the shell of the electric adjustment steering column. An upper installation support and a lower installation support are installed on the upper side and the lower side of the nut respectively, damping inserts are installed at the positions, making contact with the nut, of the upper installation support and the lower installation support, and a damping sleeve is installed at the position between the outer side of the installation pin and the motor. By arranging the damping insert and the damping sleeve, damping can be conducted in the installation and working process of the motor and the nut, and the problem that low-frequency sound, trill and adjustment sound in two directions are inconsistent in the axial adjustment process of the electrically-controlled pipe column is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of automobile electric adjusting steering column, concretely to an axial adjustment damping connection structure of electric adjusting steering column. BACKGROUND

[0002] The mounting rate of electric adjusting column (Power Column) on medium and high-end passenger cars is increasing year by year, and after entering the era of intelligent electric vehicles, electric adjusting column almost becomes the standard configuration of intelligent high-end electric vehicles. In the quiet environment of electric vehicles, the noise problem during the adjustment of electric adjusting column is increasingly prominent, and various abnormal sounds also affect the use experience of drivers and passengers. The current electric adjusting column adjustment mechanism is developed with high-end fuel vehicles. With the development of the era and the popularization of intelligent electric vehicles, there is an increasing need for an electric adjusting column that is suitable for electric vehicles and can also consider excellent NVH performance while ensuring the basic performance of the electric adjusting column.

[0003] In the existing scheme, the motor is tightly fitted with the shell through a motor mounting pin, the nut is fixed with the motor screw through a screw pair, the connecting bracket is fixed together with the nut through a mounting bolt, and the connecting bracket is interference-fitted with the protective tube. When the motor starts to operate, the screw rod rotates to drive the nut to translate, realizing axial adjustment. However, the existing motor mounting pin and the motor and shell are hard-linked, and the nut and the connecting bracket are also hard-linked, without buffering and damping. High-speed rotation of the motor during adjustment and starting will produce high-frequency vibration. This design requires very high installation precision of the motor. When the relative position of the motor screw and the axis of the electric adjusting column deviates, it will produce loud starting sound, low-frequency sound, and tremolo sound, etc. abnormal sound, affecting the driving experience. UTILITY MODEL CONTENTS

[0004] The utility model provides an axial adjustment damping connection structure of electric adjusting steering column, which can solve the problem of loud starting sound, low-frequency sound, and tremolo sound, etc. abnormal sound between the various components of the existing axial adjustment mechanism during use.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: an axial adjustment damping connection structure of electric adjusting steering column, comprising a motor, the motor is connected with the shell of the electric adjusting steering column through a mounting pin, the output end of the motor is connected with a screw rod, the screw rod is installed with a nut, the upper and lower sides of the nut are respectively installed with an upper mounting bracket and a lower mounting bracket, the positions of the upper mounting bracket and the lower mounting bracket in contact with the nut are installed with damping inserts, and the position between the outer side of the mounting pin and the motor is installed with a damping sleeve. By setting the damping inserts and the damping sleeve, the installation and working process of the motor and the nut can be damped, solving the problem of low-frequency sound, tremolo sound, and inconsistent sound in two directions during the axial adjustment of the electric adjusting column.

[0006] Preferably, the upper mounting bracket and the lower mounting bracket are provided with a one-side opening mounting hole groove, the mounting hole groove is sleeved with the boss of the nut, the damping insert is arranged between the mounting hole groove and the nut, the nut is limited through the mounting hole groove, and the damping insert covers all contact surfaces between the mounting hole groove and the nut, thereby improving damping and shockproof effects.

[0007] Preferably, the damping insert comprises a side wall damping part covering the inner side wall of the mounting hole groove and a planar damping part arranged on the side surface of the upper mounting bracket or the lower mounting bracket, the side wall damping part and the planar damping part are integrally formed, can be in full contact with the nut, and improve the firmness of mounting.

[0008] Preferably, the damping sleeve and the damping insert are rubber vulcanization parts, simple to manufacture, and good in damping effect.

[0009] Preferably, the mounting pin comprises a pin body and a connecting part arranged at one end of the pin body, and the damping sleeve is arranged at a position outside the pin body except the connecting part.

[0010] Compared with the prior art, the utility model has the beneficial effects that:

[0011] The simple structure, the damping insert and the damping sleeve are arranged to dampen the installation and working process of the motor and the nut, the high-frequency vibration of the motor and the load of the electric adjusting pipe column shell are effectively isolated compared with the prior art, the high-frequency vibration of the motor is further amplified by the body of the electric adjusting pipe column, meanwhile, the requirement of the design size chain is also improved, the cost is reduced, the light weight design of the electric adjusting pipe column is facilitated, the design of the damping insert and the damping sleeve meets the high-frequency durability requirement of the electric adjusting pipe column and meets the requirements of rigidity, clearance and the like, and the problems of low-frequency sound, tremolo and inconsistent sound in the two direction adjustment in the axial adjustment process of the electric adjusting pipe column are solved. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 is a use state perspective view of the utility model;

[0013] Figure 2 is a first perspective view of the upper mounting bracket of the utility model;

[0014] Figure 3 is a second perspective view of the upper mounting bracket of the utility model;

[0015] Figure 4 is a first perspective view of the lower mounting bracket of the utility model;

[0016] Figure 5 is a second perspective view of the lower mounting bracket of the utility model;

[0017] Figure 6 Figure 1 is a perspective view of the mounting pin of the utility model.

[0018] Reference signs:

[0019] 1, motor, 2, mounting pin, 21, pin body, 22, shock absorbing sleeve, 23, connecting part, 3, screw rod, 4, lower mounting bracket, 5, nut, 6, upper mounting bracket, 7, shock absorbing insert, 71, side wall shock absorbing part, 72, plane shock absorbing part, 8, mounting hole groove, 9, shell. DETAILED DESCRIPTION

[0020] The technical solutions 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.

[0021] As Figures 1-6 shown, the utility model discloses to solve the problem that the hard connection between each part of the existing axial adjusting mechanism leads to the generation of harsh starting sound, low frequency sound and tremolo sound and other abnormal sound when using. Provide the following technical scheme: a kind of axial adjusting shock absorbing connection structure of electrically adjusted steering column, including motor 1, the motor 1 is connected with the shell 9 of electrically adjusted steering column by mounting pin 2, the output end of the motor 1 is connected with screw rod 3, the screw rod 3 is installed with nut 5, the upper and lower sides of the nut 5 are installed with upper mounting bracket 6 and lower mounting bracket 4 respectively, the position of the upper mounting bracket 6 and lower mounting bracket 4 and nut 5 contact is installed with shock absorbing insert 7, the position between the outside of mounting pin 2 and motor 1 is installed with shock absorbing sleeve 22, by setting shock absorbing insert 7 and shock absorbing sleeve 22, the installation and working process of motor 1 and nut 5 can be damped, solve the problem of low frequency sound, tremolo sound and two direction adjusting sound inconsistency in the process of electrically adjusted steering column axial adjustment.

[0022] Specifically, when using, motor 1 drives screw rod 3 to rotate, thereby driving nut 5 to move axially, nut 5 is connected with the inner tube column of steering column through upper mounting bracket 6 and lower mounting bracket 4, thereby nut 5 drives the inner tube column to move axially.

[0023] As Figures 1-5 shown, the upper mounting bracket 6 and lower mounting bracket 4 are provided with one side opening mounting hole groove 8, the mounting hole groove 8 is sleeved with the boss on the nut 5, the shock absorbing insert 7 is arranged between the mounting hole groove 8 and the nut 5, the nut 5 can be limited by the mounting hole groove 8, the shock absorbing insert 7 can cover all the contact surfaces between the mounting hole groove 8 and the nut 5, improve the shock absorbing effect.

[0024] The damping insert 7 comprises a side wall damping part 71 covering the inner side wall of the mounting hole slot 8 and a planar damping part 72 arranged on the side of the upper mounting bracket 6 or the lower mounting bracket 4, the side wall damping part 71 and the planar damping part 72 are integrally formed and can be in full contact with the nut 5, thereby improving the firmness of the mounting.

[0025] As an embodiment of the damping sleeve 22 and the damping insert 7, the damping sleeve 22 and the damping insert 7 are both rubber vulcanized parts, simple to manufacture and good in damping effect, wherein, as shown in the drawings, Figure 6 The mounting pin 2 comprises a pin body 21 and a connecting part 23 arranged at one end of the pin body 21, the damping sleeve 22 is arranged on the outer side of the pin body 21 except the connecting part 23, a rubber layer with a certain thickness is vulcanized on the pin body 21 as the damping sleeve 22, the part after vulcanization of the rubber ensures a certain interference with the motor body, thereby ensuring the damping effect, and the connecting part 23 can be a threaded part or a riveting part.

[0026] A rubber layer with a certain thickness is vulcanized on the mounting hole slot 8 of the upper mounting bracket 6 and the lower mounting bracket 4 as the damping insert 7, the size needs to ensure a certain interference with the nut, thereby ensuring the damping effect, the thickness of the vulcanized layer on the upper mounting bracket 6 or the lower mounting bracket 4 is consistent with the interference, thereby ensuring the mounting and positioning of the nut and preventing abnormal sound during the cooperation of the parts, thereby greatly improving the stability of the upper mounting bracket 6, the lower mounting bracket 4 and the mounting pin 2.

[0027] It should be noted that all the directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application 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 directional indications also change accordingly.

[0028] In addition, the description of "first", "second" and the like in the present application is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "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, such as two, three, etc., unless otherwise specifically limited.

[0029] In the utility model, unless another definite provision and limitation, the term "connect", "fix" and so on should do the broad sense understanding, for example, "fix" can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electric connection;Can be directly connected, also can be indirectly connected through the intermediate medium, can be two element inside's intercommunication or two element's mutual action relation, unless another definite limitation.For the ordinary skill in the art, the specific meaning of the above-mentioned term in the utility model can be understood according to the specific circumstances.

[0030] In addition, the technical solutions of various embodiments of the present application can be combined with each other, but must be based on the realization of 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, also not within the protection scope required by the present application.

Claims

1. An axial adjustment and damping connection structure for an electrically adjustable steering column, comprising a motor (1), wherein the motor (1) is connected to the housing (9) of the electrically adjustable steering column via a mounting pin (2), characterized in that, The output end of the motor (1) is connected to a lead screw (3), a nut (5) is installed on the lead screw (3), an upper mounting bracket (6) and a lower mounting bracket (4) are installed on the upper and lower sides of the nut (5) respectively, a shock-absorbing insert (7) is installed on the upper mounting bracket (6) and the lower mounting bracket (4) at the position in contact with the nut (5), and a shock-absorbing sleeve (22) is installed on the outer side of the mounting pin (2) between the motor (1) and the motor.

2. The axial adjustment and damping connection structure of the electrically adjustable steering column according to claim 1, characterized in that: The upper mounting bracket (6) and the lower mounting bracket (4) are provided with mounting holes (8) with one side opening. The mounting holes (8) fit around the boss on the nut (5). The shock-absorbing insert (7) is provided between the mounting holes (8) and the nut (5).

3. The axial adjustment and damping connection structure of the electrically adjustable steering column according to claim 2, characterized in that: The shock-absorbing insert (7) includes a sidewall shock-absorbing part (71) covering the inner sidewall of the mounting hole groove (8) and a planar shock-absorbing part (72) provided on the side of the upper mounting bracket (6) or the lower mounting bracket (4).

4. The axial adjustment and damping connection structure of the electrically adjustable steering column according to claim 2, characterized in that: The shock-absorbing sleeve (22) and the shock-absorbing insert (7) are both rubber vulcanized parts.

5. The axial adjustment and damping connection structure of the electrically adjustable steering column according to claim 1, characterized in that: The mounting pin (2) includes a pin body (21) and a connecting part (23) provided at one end of the pin body (21). The shock-absorbing sleeve (22) is provided on the outside of the pin body (21) except for the connecting part (23).

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