Electrically-controlled pipe column applying novel angle adjusting mechanism

Abstract

The invention relates to an electrically-controlled pipe column applying a novel angle adjusting mechanism. An inner column pipe is arranged in an aluminum cast pipe, the aluminum cast pipe is arranged in a support, the tail of the aluminum cast pipe is hinged to the tail of the support, the hinge point is O, and the angle adjusting mechanism is installed on the support; the angle adjusting structure comprises an angle adjusting motor, a torque transmission structure and an angle adjusting support, the angle adjusting support is hinged to the end of the support, the hinge point is C, the angle adjusting support is hinged to the aluminum cast pipe, and the hinge point is D. The angle adjusting motor drives the angle adjusting support to rotate with the point C as a rotating point through the torque transmission structure. The angle adjusting bracket drives the aluminum cast pipe and the inner column pipe to rotate by taking a point O as a rotating point; the power output point of the angle adjusting motor is A, the output point of the torque transmission structure is B, and the included angle between the connecting line AB and the connecting line BC is 80-110 degrees. According to the invention, the load change is optimized, namely the quality of sound generated by the motor is optimized.

Description

Technical Field

[0001] The present invention relates to the field of inner column tubes, and more specifically to an electric adjustment tube column applying a new angle adjustment mechanism. Background Art

[0002] With the continuous development of new energy vehicles, more and more vehicles are equipped with electric adjustment tube columns, which can conveniently and quickly adjust the spatial position of the steering wheel to meet the individual needs of drivers, and its product development prospect is considerable.

[0003] At present, the product structures of electric adjustment tube columns are diverse. Based on different requirements of different vehicle manufacturers and models, a variety of electric adjustment steering column designs have been derived. With the development of new energy vehicles, vehicle manufacturers have higher and higher quality requirements for the adjustment process of electric adjustment steering columns. Most of the existing designs of the angle adjustment system of electric adjustment tube columns can only meet the peripheral installation requirements of vehicle manufacturers, but little consideration is given to the change of adjustment sound quality. Summary of the Invention

[0004] The purpose of the present invention is to provide an electric adjustment tube column applying a new angle adjustment mechanism, which can optimize the sound quality generated by the motor during the angle adjustment process.

[0005] The technical solution of the present invention:

[0006] An electric adjustment tube column applying a new angle adjustment mechanism, including a bracket, an aluminum casting tube, an inner column tube, and an angle adjustment structure. The inner column tube is arranged inside the aluminum casting tube, and the aluminum casting tube is placed inside the bracket. The tail of the aluminum casting tube is hinged to the tail of the bracket, and the hinge point is O. The angle adjustment structure is installed on the bracket. The angle adjustment structure includes an angle adjustment motor, a torque transmission structure, and an angle adjustment bracket. The angle adjustment bracket is hinged between the end of the bracket, and the hinge point is C. The angle adjustment bracket is hinged to the aluminum casting tube, and the hinge point is D. The angle adjustment motor drives the angle adjustment bracket to rotate around point C through the torque transmission structure. The angle adjustment bracket drives the aluminum casting tube and the inner column tube to rotate around point O with point D as the force application point. The power output point of the angle adjustment motor is A, and the output point of the torque transmission structure is B. The included angle between the line AB connecting point A and point B and the line BC connecting point B and point C is 80 - 110 degrees.

[0007] Advantages of the Present Invention

[0008] 1. The present application proposes a new type of angle adjustment structure for electric adjustment tube columns, a improved angle adjustment structure, which is applied to electric adjustment tube columns. The degree of change in the load driven by the motor will affect the sound quality generated by the motor rotation. Its design can minimize the load fluctuation level brought by the current angle adjustment structures on the market, and optimizing the load change means optimizing the sound quality generated by the motor. Brief Description of the Drawings

[0009] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the provided drawings.

[0010] Figure 1 It is a schematic structural diagram of an embodiment of the electro-adjustable pipe string of the present application.

[0011] Figure 2 It is a schematic diagram of a partial structure of an embodiment of the electro-adjustable pipe string of the present application.

[0012] Figure 3 It is a schematic diagram of the mechanical model of the electro-adjustable pipe string of the present application.

[0013] Figure 4 It is a schematic diagram of the principle of the electro-adjustable pipe string of the present application.

[0014] Figure 5 It is a diagram of the noise test equipment of the electro-adjustable pipe string of the present application.

[0015] Figure 6 It is the noise test data of the electro-adjustable pipe string in the prior art.

[0016] Figure 7 It is the noise test data of the electro-adjustable pipe string of the present application.

[0017] Reference Signs:

[0018] Bracket 1; Aluminum Casting Pipe 2; Inner Column Pipe 3; Angle Adjusting Motor 4; Torque Transmission Structure 5; Angle Adjusting Bracket 6; Flexible Shaft 51; Bearing Seat 52; Support Pin 53; Lead Screw 54; Nut 55; Small Bracket 56; Angle Adjusting Retaining Bracket 57; Long Hole 11; Sliding Plate 12. Detailed Description of the Invention

[0019] In order to solve the problems in the background art, the present application specifically invents an electro-adjustable pipe string applying a new angle adjustment mechanism, in which the change of the motor load is minimized during the angle adjustment, and the sound quality is prioritized.

[0020] The following will describe the present application in detail with reference to the drawings:

[0021] As Figure 1-2As shown in the figure, an electronically adjustable pipe column applying a new angle adjustment mechanism includes a bracket, an aluminum casting pipe, an inner pipe, and an angle adjustment structure. The inner pipe is arranged inside the aluminum casting pipe, and the aluminum casting pipe is arranged inside the bracket. The tail of the aluminum casting pipe is hinged to the tail of the bracket, and the hinge point is O. The angle adjustment structure is installed on the bracket. The angle adjustment structure includes an angle adjustment motor, a torque transmission structure, and an angle adjustment bracket. The angle adjustment bracket is hinged between the end of the bracket, and the hinge point is C. The angle adjustment bracket is hinged to the aluminum casting pipe, and the hinge point is D. The angle adjustment motor drives the angle adjustment bracket to rotate around point C through the torque transmission structure. The angle adjustment bracket drives the aluminum casting pipe and the inner pipe to rotate around point O with point D as the force application point. The power output point of the angle adjustment motor is A, and the output point of the torque transmission structure is B. The included angle between the line AB connecting point A and point B and the line BC connecting point B and point C is 80 - 110 degrees. The included angle between the line AB connecting point A and point B and the line BC connecting point B and point C is preferably 90 degrees.

[0022] As Figure 1-2 shown in the figure, the details are as follows: The bracket is directly fixedly installed on the CCB board of the client port. The angle adjustment motor is the output unit driving the angle adjustment structure. The torque transmission structure converts the rotational motion of the motor into linear motion. Its form can be a lead screw and a nut, internal and external threads, a cam slider, etc. The form is not limited. It can be rigid or non-rigid. The small bracket is used to fix the torque transmission structure on the bracket.

[0023] The implementation method of this application is that the angle adjustment motor converts the rotational motion into linear motion through the torque transmission structure. Their output ports and transmission ports form a straight line. The position of the motor output point is on the straight line AB of the torque transmission structure. Here, A can be understood as the motor output point (i.e., the point where the angle motor is connected to the torque transmission structure), and B can be understood as the output point of the torque transmission structure (the point in the torque transmission structure connected to the angle adjustment bracket), driving the angle adjustment bracket to rotate. The straight line CB formed by the rotation compensation point C on the bracket (i.e., the point where the angle adjustment bracket is connected to the bracket, also called the rotation clearance compensation point) and the output point B of the torque transmission structure forms an included angle of 80 - 110° with the straight line AB. The force direction F1 of point B is on the straight line AB. This structural design makes the moving point D on the angle adjustment bracket (i.e., the point where the angle adjustment bracket is hinged to the bracket) and the hinge point O of the tail of the bracket and the tail of the aluminum casting pipe (the rotation point of the whole inner pipe) form a straight line DO. The design ensures that the included angle between the force direction F2 of point D and DO is about 80 - 110°, thus ensuring that the link mechanism bracket drives the moving body to achieve angle adjustment, and this form of adjustment has the smallest torque fluctuation.

[0024] As Figure 3-4As shown, the design principle is that the design position F1 is perpendicular to BC, and F2 is perpendicular to OD; during the adjustment process, their positional relationship changes near the perpendicular relationship, that is, the fluctuation around 90° of the sine curve is the smallest. The cumulative fluctuation of the two is the smallest. Specific embodiments:

[0026] As Figure 1-2 shown, the electrically adjustable pipe column includes a bracket 1, an aluminum casting pipe 2, an inner pipe 3, and an angle adjustment structure. The inner pipe 3 is placed inside the aluminum casting pipe 1, the aluminum casting pipe 2 is placed inside the bracket 1, the tail of the aluminum casting pipe 2 is hinged to the tail of the bracket 1, and the angle adjustment structure is installed on the bracket 1. The angle adjustment structure includes an angle adjustment motor 4, a torque transmission structure 5, and an angle adjustment bracket 6. The angle adjustment motor 4 is installed on the side of the bracket 1.

[0027] The torque transmission structure 5 includes a flexible shaft 51, a bearing seat 52, a support pin 53, a lead screw 54, a nut 55, and a small bracket 56. The flexible shaft 51 is connected to the drive shaft of the angle adjustment motor 4 with a clearance fit.

[0028] The lead screw 51 passes through the nut 55 and the bearing seat 52 and is connected to the flexible shaft 51. A threaded hole matching the lead screw is provided inside the nut 55. The nut is placed between the angle adjustment bracket 6 and the angle adjustment retaining bracket 57, and the nut is hinged to the angle adjustment bracket and the angle adjustment retaining bracket. The angle adjustment bracket and the angle adjustment retaining bracket are connected by bolts. The support pin is perpendicular to the lead screw, and an avoidance hole for the lead screw to pass through is provided on the support pin. A through hole for the support pin to pass through is provided through the side of the bearing seat. The support pin passes through the through hole and is in interference fit with the small bracket. The small bracket is connected to the bracket by bolts.

[0029] The angle adjustment bracket is hinged to the bracket. A long hole 11 is provided at the end of the bracket. A sliding piece 12 is placed on the long hole. A bolt passes through the central hole of the sliding piece 12 and the long hole and is hinged to the angle adjustment bracket. The angle adjustment bracket is hinged to the end of the aluminum casting pipe.

[0030] The connection point of the angle adjustment motor and the flexible shaft is A, the center point of the nut is B, the central hole of the sliding piece is C, the hinge point of the angle adjustment bracket and the end of the aluminum casting pipe is D, the hinge point of the tail of the bracket and the tail of the aluminum casting pipe is O. The included angle between the line AB and the line BC is 80 - 110 degrees.

[0031] The included angle between the line AB and the line BC is preferably 90 degrees.

[0032] Working process:

[0033] The angle adjustment motor of the angle adjustment structure drives the lead screw to rotate within the bearing block through a flexible shaft. During the rotation of the lead screw, the nut moves back and forth on the lead screw. During the movement of the nut, it pushes the angle adjustment bracket to rotate on the bracket 1, causing the angle adjustment bracket 4 to drive the inner column tube to rotate, thereby achieving the angle adjustment of the inner column tube.

[0034] Specific comparative experiments:

[0035] As Figure 5 shown, under the same test conditions, the test data of the two schemes in the UP and DOWN directions of the angle adjustment are compared when the microphone is 150 mm away from the center of the steering wheel.

[0036] The mechanical structures are different, using the same angle adjustment motor (only the mechanical structure design is different) with the same external parameters (the vehicle tooling and the steering wheel airbag are the same).

[0037] As Figure 6 shown are the data of two groups of tests respectively in the UP and DOWN directions of the angle adjustment of the electric adjustment steering column designed by the conventional scheme.

[0038] As shown in 7 are the data of two groups of tests respectively in the UP and DOWN directions of the angle adjustment with the same motor replaced in the new angle adjustment mechanism. It can be seen that from the average value and the maximum value, it is better than the original system angle adjustment scheme.

[0039] From the above experiments, it can be seen that in the design of the electric adjustment pipe column of the present application, the load change brought by the angle adjustment structure is minimized, and optimizing the load change optimizes the sound quality.

[0040] The above schematically describes the present invention and its implementation manners. This description is not restrictive. What is shown in the drawings is only one of the implementation manners of the present invention, and the actual structure is not limited thereto. Therefore, if those of ordinary skill in the art are inspired by it and without departing from the content of the technical solution of the present invention, and design similar structural manners and implementations to this technical solution without creative efforts based on the technical essence of the present invention, they should all fall within the protection scope of the present invention.

Claims

1. An electronically adjustable pipe column applying a new angle adjustment mechanism, comprising a bracket, an aluminum casting pipe, an inner pipe, and an angle adjustment structure. The inner pipe is arranged inside the aluminum casting pipe, and the aluminum casting pipe is placed inside the bracket. The tail of the aluminum casting pipe is hinged to the tail of the bracket, and the hinge point is O. The angle adjustment structure is installed on the bracket. The angle adjustment structure includes an angle adjustment motor, a torque transmission structure, and an angle adjustment bracket. The angle adjustment bracket is hinged between the end of the bracket, and the hinge point is C. The angle adjustment bracket is hinged to the aluminum casting pipe, and the hinge point is D. The angle adjustment motor drives the angle adjustment bracket to rotate around point C through the torque transmission structure. The angle adjustment bracket drives the aluminum casting pipe and the inner pipe to rotate around point O with point D as the force application point. The power output point of the angle adjustment motor is A, and the output point of the torque transmission structure is B. The included angle between the line AB connecting point A and point B and the line BC connecting point B and point C is 80 - 110 degrees.

2. The electronically adjustable pipe column applying a new angle adjustment mechanism according to claim 1, characterized in that: the included angle between the line AB connecting point A and point B and the line BC connecting point B and point C is 90 degrees.

3. The electronically adjustable pipe column applying a new angle adjustment mechanism according to claim 1, characterized in that: the electronically adjustable pipe column includes a bracket, an aluminum casting pipe, an inner pipe, and an angle adjustment structure. The inner pipe is arranged inside the aluminum casting pipe, the aluminum casting pipe is placed inside the bracket, the tail of the aluminum casting pipe is hinged to the tail of the bracket, and the angle adjustment structure is installed on the bracket. The angle adjustment structure includes an angle adjustment motor, a torque transmission structure, and an angle adjustment bracket. The angle adjustment motor is installed on the side of the bracket; the torque transmission structure includes a flexible shaft, a bearing seat, a support pin, a lead screw, a nut, and a small bracket. The flexible shaft is connected with the drive shaft of the angle adjustment motor with a clearance fit; the lead screw passes through the nut and the bearing seat and is connected with the flexible shaft. The inner part of the nut is provided with a threaded hole matching the lead screw. The nut is placed between the angle adjustment bracket and the angle adjustment retaining bracket, and the nut is hinged to the angle adjustment bracket and the angle adjustment retaining bracket. The angle adjustment bracket and the angle adjustment retaining bracket are connected by bolts. The support pin is perpendicular to the lead screw, and an avoidance hole for the lead screw to pass through is opened on the support pin. A through hole for the support pin to pass through is penetrated on the side of the bearing seat. The support pin passes through the through hole and is in interference fit with the small bracket. The small bracket is connected with the bracket by bolts; the angle adjustment bracket is hinged to the front end of the bracket. A long hole is opened on the end of the bracket, and a sliding piece is placed on the long hole. A bolt passes through the central hole of the sliding piece and the long hole and is hinged to the angle adjustment bracket. The angle adjustment bracket is hinged to the end of the aluminum casting pipe; the connection point between the angle adjustment motor and the flexible shaft is A, the center point of the nut is B, the central hole of the sliding piece is C, the hinge point between the angle adjustment bracket and the end of the aluminum casting pipe is D, the hinge point between the tail of the bracket and the tail of the aluminum casting pipe is O, and the included angle between the line AB and the line BC is 80 - 110 degrees.

4. The electronically adjustable pipe column applying a new angle adjustment mechanism according to claim 1, characterized in that: The included angle between the line segment AB and the line segment BC is 90 degrees.

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