阅读说明：本技术 一种转向管柱调节手柄操作力的确定方法及转向管柱 (Method for determining operation force of steering column adjusting handle and steering column ) 是由 吴锐 于江 朱新华 于 2020-04-07 设计创作，主要内容包括：本发明涉及汽车零部件技术领域,本发明公开了一种转向管柱调节手柄操作力的确定方法及转向管柱,该转向管柱调节手柄操作力的确定方法包括以下步骤：调节转向管柱调节手柄的质量；确定该转向管柱调节手柄的安装位置；确定转向管柱加速度；根据该转向管柱调节手柄的安装位置和该转向管柱加速度计算该转向管柱调节手柄最小开启力矩；根据该转向管柱调节手柄最小开启力矩设定该转向管柱调节手柄操作力；验证该转向管柱调节手柄操作力。本发明提供的转向管柱调节手柄力的确定方法具有能够在汽车发生碰撞过程中转向管柱发生溃缩吸能和保护驾驶员安全的特点。(The invention relates to the technical field of automobile parts, and discloses a method for determining the operating force of an adjusting handle of a steering column and the steering column, wherein the method for determining the operating force of the adjusting handle of the steering column comprises the following steps: adjusting the quality of a steering column adjusting handle; determining the installation position of the steering column adjusting handle; determining the acceleration of the steering column; calculating the minimum opening torque of the steering column adjusting handle according to the installation position of the steering column adjusting handle and the acceleration of the steering column; setting the operating force of the steering column adjusting handle according to the minimum opening torque of the steering column adjusting handle; verifying the operation force of the steering column adjusting handle. The method for determining the force of the adjusting handle of the steering column has the characteristics of being capable of absorbing energy when the steering column collapses and protecting the safety of a driver in the collision process of an automobile.)

1. A method for determining the operating force of an adjusting handle of a steering column is characterized by comprising the following steps:

adjusting the mass of a steering column adjusting handle (1);

determining the installation position of the steering column adjusting handle (1);

determining the acceleration of the steering column;

calculating the minimum opening torque of the steering column adjusting handle according to the installation position of the steering column adjusting handle (1) and the acceleration of the steering column;

setting the operating force of the steering column adjusting handle according to the minimum opening torque of the steering column adjusting handle;

verifying the operating force of the steering column adjusting handle.

2. The method of determining an operating force of a steering column adjustment handle according to claim 1, wherein adjusting the mass of the steering column adjustment handle (1) comprises:

thinning the steering column adjusting handle (1);

and a reinforcing rib (103) is arranged on the steering column adjusting handle (1).

3. The method of determining an operating force of a steering column adjustment handle according to claim 1,

the mass center of the steering column adjusting handle (1) is higher than the rotating shaft (2) of the steering column adjusting handle (1), and/or the linear distance between the mass center of the steering column adjusting handle (1) and the rotating shaft (2) of the steering column adjusting handle (1) is zero.

4. The determination method of the steering column adjustment handle operating force according to claim 1, wherein the determining the mounting position of the steering column adjustment handle (1) includes:

and adjusting the steering column adjusting handle (1) to the left side of the steering wheel (7) or the right side of the steering wheel (7).

5. The method of determining a steering column adjustment handle operating force according to claim 1, wherein the determining a steering column acceleration includes:

-mounting a bidirectional acceleration sensor on the steering column (6) of a vehicle;

acquiring a vehicle acceleration data set of the vehicle under the condition that 40% offset collision speed is 72Km/h impact through the bidirectional acceleration sensor;

processing the vehicle acceleration data set to obtain a target acceleration of the steering column (6).

6. The method of determining an operating force of a steering column adjustment handle according to claim 1, wherein the calculating a steering column adjustment handle minimum opening torque based on the installation position of the steering column adjustment handle (1) and the steering column acceleration includes:

determining the mass of the steering column adjustment handle (1);

determining the centre of mass of the steering column adjustment handle (1);

obtaining a moment arm value according to the mass center of the steering column adjusting handle (1);

and calculating the minimum opening torque of the steering column adjusting handle according to the moment arm value, the mass of the steering column adjusting handle (1) and the acceleration of the steering column.

7. The method for determining an operating force of a steering column adjustment handle according to claim 6, wherein the calculating the steering column adjustment handle minimum opening torque based on the moment arm value, the mass of the steering column adjustment handle (1) and the steering column acceleration comprises:

obtaining the inertia force of the steering column adjusting handle (1) according to the mass of the steering column adjusting handle (1) and the acceleration of the steering column;

obtaining the gravity of the steering column adjusting handle (1) according to the mass of the steering column adjusting handle (1);

obtaining the resultant moment of the steering column adjusting handle according to the inertia force of the steering column adjusting handle (1), the gravity of the steering column adjusting handle (1) and the force arm value;

and calculating the minimum opening torque of the steering column adjusting handle according to the resultant torque of the steering column adjusting handle.

8. The method of determining a steering column adjustment handle operation force according to claim 1, wherein the setting of the steering column adjustment handle operation force according to the steering column adjustment handle minimum opening torque includes:

determining an operating arm of force of the steering column adjusting handle (1);

obtaining the operating force of the steering column adjusting handle according to the operating force arm of the steering column adjusting handle (1) and the minimum opening torque of the steering column adjusting handle;

verifying the steering column adjustment handle operating force includes:

and manufacturing the steering column (6) according to the requirement of the minimum opening force of the steering column adjusting handle to carry out a collision test.

9. A steering column is characterized by comprising a steering column lower swing arm support (3), a steering column upper shaft tube (4), a steering column fixing support (5) and a steering column adjusting handle (1);

the steering column lower swing arm support (3) is arranged in a groove of the steering column fixing support (5);

the steering column fixing support (5) is fixedly connected with a vehicle instrument beam;

the steering column lower swing arm support (3) comprises a first end and a second end;

the steering column fixing support (5) comprises a third end and a fourth end;

the first end is connected with the steering column upper shaft tube (4), and the second end is rotatably connected with the third end;

steering column adjustment handle (1) with the fourth end first end is rotated and is connected, the barycenter of steering column adjustment handle (1) is higher than rotation axis (2) of steering column adjustment handle (1), and/or, the barycenter of steering column adjustment handle (1) with rotation axis (2) linear distance of steering column adjustment handle (1) is zero.

10. Steering column (6) according to claim 9, characterized in that the steering column adjustment handle (1) comprises a support section (101) and a grip section (102);

one end of the supporting section (101) is connected with the steering column lower swing arm support (3), and the other end of the supporting section (101) is connected with the handle means (102);

and the angle between the supporting section (101) and the handle means (102) is less than 180 degrees.

Technical Field

The invention relates to the technical field of automobile parts, in particular to a method for determining the operating force of an adjusting handle of a steering column and the steering column.

Background

With the continuous development of the automobile industry, the requirement on the safety performance of the automobile in the driving process is higher and higher, so that the safety problem of a driver in the driving process becomes a research focus.

Due to the limitation of the space of the cab and the limitation of the posture of a driver in a driving state, when collision occurs, the two knees of the driver are easy to touch the part of the steering column adjusting handle, so that injury is caused; at present, the steering column regulating handle operating force is completely set based on the comfortable angle of operation of human engineering, the regulating handle opening and closing moment of the steering column is generally and directly required to be less than 50N, but when the mass center of the steering column regulating handle is far away from the rotating shaft of the steering column regulating handle, the weight of the steering column regulating handle is heavier, in the collision process, larger inertia force can be generated, so that a larger main moment of inertia force for opening the steering column regulating handle is generated, when the main moment of inertia force is greater than the opening moment of the steering column regulating handle, the steering column regulating handle is opened, the steering column can not be effectively collapsed in the collision process, and the safety of a driver can not be effectively protected.

Disclosure of Invention

The invention aims to solve the technical problems that the operating force requirement of an adjusting handle of a steering column is not strict, the steering column cannot be collapsed and absorb energy normally in the collision process of an automobile, and the safety of a driver is threatened.

In order to solve the technical problem, the application discloses a method for determining the operating force of an adjusting handle of a steering column, which comprises the following steps:

adjusting the quality of a steering column adjusting handle;

determining the installation position of the steering column adjusting handle;

determining the acceleration of the steering column;

calculating the minimum opening torque of the steering column adjusting handle according to the installation position of the steering column adjusting handle and the acceleration of the steering column;

setting the operating force of the steering column adjusting handle according to the minimum opening torque of the steering column adjusting handle;

verifying the operation force of the steering column adjusting handle.

Optionally, the adjusting the mass of the steering column adjustment handle comprises:

thinning the steering column adjusting handle;

the steering column adjusting handle is provided with a reinforcing rib.

Optionally, the steering column adjustment handle has a center of mass that is higher than the axis of rotation of the steering column adjustment handle, and/or the steering column adjustment handle has a center of mass that is a zero linear distance from the axis of rotation of the steering column adjustment handle.

Optionally, the determining the mounting position of the steering column adjustment handle comprises:

the steering column adjustment handle is adjusted to either the left side of the steering wheel or the right side of the steering wheel.

Optionally, the determining the steering column acceleration comprises:

installing a bidirectional acceleration sensor on the steering column of the vehicle;

acquiring a vehicle acceleration data set of the vehicle under the condition that 40% offset collision speed is 72Km/h impact through the bidirectional acceleration sensor;

the vehicle acceleration data set is processed to obtain a target acceleration of the steering column.

Optionally, the calculating a minimum opening torque of the steering column adjustment handle according to the installation position of the steering column adjustment handle and the steering column acceleration includes:

determining the mass of the steering column adjustment handle;

determining a center of mass of the steering column adjustment handle;

obtaining a moment arm value according to the mass center of the steering column adjusting handle;

and calculating the minimum opening torque of the steering column adjusting handle according to the moment arm value, the mass of the steering column adjusting handle and the acceleration of the steering column.

Optionally, the calculating the minimum opening torque of the steering column adjusting handle according to the moment arm value, the mass of the steering column adjusting handle and the acceleration of the steering column includes:

obtaining the inertia force of the steering column adjusting handle according to the mass of the steering column adjusting handle and the acceleration of the steering column;

obtaining the gravity of the steering column adjusting handle according to the mass of the steering column adjusting handle;

obtaining the resultant moment of the adjusting handle of the steering column according to the inertia force of the adjusting handle of the steering column, the gravity of the adjusting handle of the steering column and the force arm value;

and calculating the minimum opening torque of the steering column adjusting handle according to the resultant torque of the steering column adjusting handle.

Optionally, the setting of the steering column adjustment handle operating force according to the steering column adjustment handle minimum opening torque includes:

determining an operating arm of force of the steering column adjusting handle;

obtaining the operating force of the steering column adjusting handle according to the operating force arm of the steering column adjusting handle and the minimum opening moment of the steering column adjusting handle;

should verify this steering column adjustment handle operating force, include:

and manufacturing the steering column according to the requirement of the minimum opening force of the adjusting handle of the steering column to carry out a collision test.

The application also discloses a steering column, which comprises a lower swing arm bracket of the steering column, an upper shaft tube of the steering column, a fixed bracket of the steering column and a regulating handle of the steering column;

the steering column lower swing arm support is arranged in a groove of the steering column fixing support;

the steering column fixing support is fixedly connected with a vehicle instrument beam;

the steering column lower swing arm support comprises a first end and a second end;

the steering column fixing support comprises a third end and a fourth end;

the first end is connected with an upper shaft tube of the steering column, and the second end is rotatably connected with the third end;

the steering column adjusting handle is rotatably connected with the fourth end and the first end, the mass center of the steering column adjusting handle is higher than the rotating shaft of the steering column adjusting handle, and/or the linear distance between the mass center of the steering column adjusting handle and the rotating shaft of the steering column adjusting handle is zero.

Optionally, the steering column adjustment handle comprises a support section and a handle means;

one end of the supporting section is connected with the lower swing arm bracket of the steering column, and the other end of the supporting section is connected with the handle section;

and the included angle between the supporting section and the handle section is less than 180 degrees.

By adopting the technical scheme, the method for determining the operating force of the adjusting handle of the steering column has the following beneficial effects:

the application discloses a method for determining the operating force of an adjusting handle of a steering column, which comprises the following steps: adjusting the quality of a steering column adjusting handle; determining the installation position of the steering column adjusting handle; determining the acceleration of the steering column; calculating the minimum opening torque of the steering column adjusting handle according to the installation position of the steering column adjusting handle and the acceleration of the steering column; setting the operating force of the steering column adjusting handle according to the minimum opening torque of the steering column adjusting handle; verifying the operation force of the steering column adjusting handle. The steering column adjusting handle operating force obtained in the way can be used for absorbing energy when the steering column collapses in the process of collision of the automobile, so that the safety of a driver is protected.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a flow chart of a method of determining an operating force of a steering column adjustment handle according to the present application;

FIG. 2 is a schematic view of an alternative steering wheel steering apparatus according to the present application;

FIG. 3 is a view of the position of the center of mass of the steering column adjustment handle of the present application;

FIG. 4 is a force analysis diagram of a steering column adjustment handle of the present application;

FIG. 5 is a gravimetric analysis of the steering column adjustment handle of the present application;

FIG. 6 is an analysis view of the operating force of the steering column adjusting handle according to the present application;

FIG. 7 is a schematic view of an alternative steering column adjustment handle configuration of the present application;

the following is a supplementary description of the drawings:

1-steering column adjusting handle; 101-a support section; 102-means; 103-reinforcing ribs; 2-a rotating shaft; 3-steering column lower swing arm support; 4-steering column upper axle tube; 5-steering column fixing support; 6-a steering column; 7-steering wheel.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic may be included in at least one implementation of the present application. In the description of the present application, it is to be understood that the terms "upper", "lower", "top", "bottom", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. Moreover, the terms "first," "second," and the like are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein.

As shown in fig. 1 and 2, fig. 1 is a flowchart of a method of determining an operating force of a steering column adjustment handle according to the present application; FIG. 2 is a schematic view of an alternative steering wheel steering apparatus according to the present application; the application discloses a method for determining the operating force of an adjusting handle of a steering column, which comprises the following steps:

s101, adjusting the mass of a steering column adjusting handle 1;

s102, determining the installation position of the steering column adjusting handle 1;

s103, determining the acceleration of the steering column;

s104, calculating the minimum opening moment of the steering column adjusting handle according to the installation position of the steering column adjusting handle 1 and the acceleration of the steering column;

s105, setting the operation force of the steering column adjusting handle according to the minimum opening torque of the steering column adjusting handle;

and S106, verifying the operation force of the steering column adjusting handle.

Therefore, the method for determining the operating force of the steering column adjusting handle is used for determining the operating force of the steering column adjusting handle, so that the risk that the steering column adjusting handle 1 is opened in the collision process is avoided, the steering column 6 is subjected to collapse energy absorption in the collision process, and the safety of a driver is protected.

In an alternative embodiment, step S101 includes:

thinning the steering column adjusting handle 1;

the steering column adjusting handle 1 is provided with a reinforcing rib.

Through the improvement to the steering column adjustment handle 1, the quality of the steering column adjustment handle 1 is reduced, meanwhile, the structural strength of the steering column adjustment handle 1 can be kept, the inertia moment of the steering column adjustment handle in the collision process can be effectively reduced, and therefore the risk that the steering column adjustment handle 1 is opened in the collision process is reduced.

In an alternative embodiment, the center of mass of the steering column adjustment handle 1 is higher than the rotating shaft 2 of the steering column adjustment handle 1, and the linear distance between the center of mass of the steering column adjustment handle 1 and the rotating shaft 2 of the steering column adjustment handle 1 is zero; in another alternative embodiment, the centre of mass of the steering column adjustment handle 1 is higher than the axis of rotation 2 of the steering column adjustment handle 1; in another alternative embodiment, the linear distance between the center of mass of the steering column adjustment handle 1 and the rotation axis 2 of the steering column adjustment handle 1 is zero; the mass center of the steering column adjusting handle 1 is higher than the rotating shaft 2 of the steering column adjusting handle 1, so that the inertia moment of the steering column adjusting handle 1 in the collision process can be effectively reduced, and the risk that the steering column adjusting handle 1 is opened in the collision process is reduced.

In an alternative embodiment, step S102 includes:

adjusting the steering column adjustment handle 1 to the left side of the steering wheel 7 or the right side of the steering wheel 7 reduces the risk of the steering column adjustment handle 1 being opened during a collision.

However, in the implementation, if adjusting the position of the steering column adjustment handle 1 greatly affects peripheral components, the position of the steering column adjustment handle 1 may not be processed, that is, the steering column adjustment handle 1 is located below the steering wheel 7.

In an alternative embodiment, step S103 includes:

a bidirectional acceleration sensor is mounted on this steering column 6 of the vehicle, in particular on the steering column lower swing arm support 3, and it is close to the centre of mass of the steering column adjustment handle 1.

Acquiring a vehicle acceleration data set of the vehicle under the condition that the 40% offset collision speed of the vehicle is 72Km/h impact through the bidirectional acceleration sensor, specifically, as shown in FIG. 3, FIG. 3 is a centroid position diagram of the steering column adjusting handle 1 of the present application; during a crash, the acceleration of the vehicle in the vertical plane, that is to say in the longitudinal plane of the vehicle, is measured, since the acceleration perpendicular to the vertical plane of the vehicle, that is to say in the lateral direction of the vehicle, is independent of the opening of the steering column regulating handle 1, it can be seen from fig. 3 that the acceleration of the vehicle in the vertical plane is resolved, resulting in a partial acceleration Ax in the positive direction of the x-axis, that is to say, as shown in fig. 3, the x-axis is parallel to the axis of the upper tube 4 of the steering column and the direction towards the steering wheel 7 is in the positive direction; and a component acceleration Az in the positive z-axis direction, where the z-axis is perpendicular to the x-axis, that is, Az is perpendicular to Ax.

Processing the vehicle acceleration data set to obtain a target acceleration of the steering column 6, and in an optional embodiment, collecting the vehicle acceleration at least three times to form the vehicle acceleration data set, and taking a maximum value of the acceleration as the target acceleration of the steering column 6; in another alternative embodiment, the vehicle acceleration is collected at least three times, constituting the vehicle acceleration data set, and the average of the vehicle acceleration data set is taken as the target acceleration of the steering column 6.

In an alternative embodiment, step S104 includes:

the mass of the steering column adjustment handle 1, that is, the mass m of the steering column adjustment handle 1 adjusted in step S101 is determined.

The center of mass of the steering column adjustment handle 1 is determined, and specifically, as shown in fig. 3, point O is the center of mass of the steering column adjustment handle 1.

The moment arm value is obtained according to the mass center of the steering column adjusting handle 1, and as can be seen from fig. 3, the vertical distance from the mass center to the x axis is dz, and the vertical distance from the mass center to the z axis is dx.

And calculating the minimum opening torque of the steering column adjusting handle according to the force arm value, the quality of the steering column adjusting handle 1 and the acceleration of the steering column, wherein the minimum opening torque of the steering column adjusting handle can ensure the comfortable man-machine operation and also ensure the safe collapse performance of the steering column 6.

In the prior art, the requirement on the opening and closing force of the steering column adjusting handle 1 is less than 50N, the technical requirement only considers the requirement on the operation comfort of the human-machine engineering, and does not consider the requirement on the collision safety of the steering column 6, and if the opening force of the steering column adjusting handle is small, the risk that the steering column adjusting handle 1 is opened can occur in the collision process of the steering column 6, the steering column 6 cannot normally collapse and absorb energy, and the safety of a driver cannot be effectively protected.

In an alternative embodiment, the calculating the minimum opening torque of the steering column adjusting handle according to the moment arm value, the mass of the steering column adjusting handle 1 and the steering column acceleration comprises:

obtaining the inertia force of the steering column adjusting handle 1 according to the mass of the steering column adjusting handle 1 and the acceleration of the steering column; as shown in fig. 4, fig. 4 is a force analysis diagram of the steering column adjusting handle of the present application; the steering column adjusting handle 1 is subjected to gravity G, which is subjected to constraint forces Fz and Fx along the Z axis and the X axis at the origin O, during a collision, if it is ensured that the steering column adjusting handle 1 is not opened, the motion of the steering column adjusting handle 1 belongs to rigid translation, the acceleration on the steering column lower swing arm support 3 can be regarded as the acceleration of the center of mass of the steering column adjusting handle, that is, the steering column acceleration determined in the step S103, and the acceleration generated when the steering column adjusting handle 1 is collided can be simplified into the acceleration of the steering column adjusting handle 1 subjected to the inertia forces Fiz and Fix passing through the center of mass, and the calculation formulas of the inertia forces Fiz and Fix are as follows:

fiz formula (1) m × Az … …

Fix ═ m × Ax … … equation (2)

Wherein Fiz is oriented in the opposite direction to Az and Fix is oriented in the opposite direction to Ax;

obtaining the gravity of the steering column adjusting handle 1 according to the mass of the steering column adjusting handle 1; as shown in fig. 5, fig. 5 is a gravity analysis view of the steering column adjustment handle 1 of the present application; the vertical distance between the gravity of the steering column adjusting handle 1 and the axis z' is dg;

obtaining the resultant moment M of the steering column adjusting handle according to the inertia force of the steering column adjusting handle 1, the gravity of the steering column adjusting handle 1 and the force arm value; the formula for obtaining the resultant torque of the steering column adjusting handle according to the formula (1) and the formula (2) is as follows:

M-Fiz × dx + Fix × dz + G × dg-M × Az × dx + M × Ax × dz + M × G × dg … formula (3)

And calculating the minimum opening torque of the steering column adjusting handle according to the resultant torque of the steering column adjusting handle. As can be seen from the above stress analysis of the steering column adjustment handle 1, the gravity G, the inertia force Fiz, and the Fix of the steering column adjustment handle 1 all have a tendency to cause the steering column adjustment handle 1 to be opened around the rotation axis 2 of the adjustment handle, and if the steering column adjustment handle 1 is not opened during the collision, the opening moment of the adjustment handle is greater than the closing moment of the steering column adjustment handle, so that the steering column adjustment handle 1 can be kept in translational motion during the collision, and the rotational motion around the rotation axis 2 does not occur, i.e., the minimum opening moment M of the steering column adjustment handle_open-minThe calculation formula of (a) is as follows:

M_open-minformula (4) of not less than M … …

Az when maximum resultant moment at the same time_maxAnd Ax_maxSubstituting the minimum opening torque M of the steering column adjusting handle into the resultant torque calculation formula_open-min。

In an alternative embodiment, step S105 includes:

determining the operating arm of force of the steering column adjusting handle 1; as shown in fig. 6, fig. 6 is an analysis view of the operation force of the steering column adjusting handle according to the present application; as can be seen from fig. 6, F is the steering column adjustment handle operating force, and L is the moment arm of the steering column adjustment handle operating force;

the steering column adjustment handle operating force is obtained according to the operating arm of the steering column adjustment handle 1 and the minimum opening torque of the steering column adjustment handle, that is, the calculation formula of the steering column adjustment handle operating force F can be obtained according to the formula (3) and the formula (4) is as follows:

F＝M_open-min/L … … formula (5)

In practice, however, the manufacturing tolerance M of the opening torque of the steering column adjusting handle is taken into consideration₁Therefore, the formula (5) needs to be corrected, and the calculation formula of the steering column adjustment handle operation force F after the correction is as follows:

F＝(M_open-min+M₁) The formula (6) of/L … ….

Step S106 includes:

the steering column 6 is manufactured according to the requirement of the minimum opening force of the steering column adjusting handle to carry out a collision test, specifically, a newly manufactured steering column 6 sample piece according to the requirement of the operation force of the steering column adjusting handle is subjected to the collision test, and after multiple times of collision test verification, when the steering column adjusting handle 1 is in a closed state in the collision process, namely, the stable collapse energy absorption of the steering column 6 can be ensured under the state, and the safety of a driver can be effectively protected.

As shown in fig. 2, the present application further discloses a steering column 6, which comprises a steering column lower swing arm support 3, a steering column upper shaft tube 4, a steering column fixing support 5 and a steering column adjusting handle 1;

the lower swing arm bracket 3 of the steering column is arranged in a groove of the fixed bracket 5 of the steering column;

the steering column fixing bracket 5 is fixedly connected with a vehicle instrument beam;

the steering column lower swing arm bracket 3 includes a first end and a second end;

the steering column fixing bracket 5 comprises a third end and a fourth end;

the first end is connected with the steering column upper shaft tube 4, and the second end is rotatably connected with the third end;

the steering column adjusting handle 1 is rotatably connected with the fourth end and the first end, in an optional embodiment, the center of mass of the steering column adjusting handle 1 is higher than the rotating shaft 2 of the steering column adjusting handle 1, and the linear distance between the center of mass of the steering column adjusting handle 1 and the rotating shaft 2 of the steering column adjusting handle 1 is zero; in another alternative embodiment, the centre of mass of the steering column adjustment handle 1 is higher than the axis of rotation 2 of the steering column adjustment handle 1; in another alternative embodiment, the linear distance between the center of mass of the steering column adjustment handle 1 and the rotation axis 2 of the steering column adjustment handle 1 is zero; the mass center of the steering column adjusting handle 1 is higher than the rotating shaft 2 of the steering column adjusting handle 1, so that the inertia moment of the steering column adjusting handle 1 in the collision process can be effectively reduced, and the risk that the steering column adjusting handle 1 is opened in the collision process is reduced.

In an alternative embodiment, as shown in FIG. 7, FIG. 7 is a schematic view of an alternative steering column adjustment handle configuration of the present application; the steering column adjustment handle 1 comprises a support section 101 and a grip section 102;

one end of the supporting section 101 is connected with the steering column lower swing arm bracket 3, and the other end of the supporting section 101 is connected with the handle section 102; and the angle between the supporting segment 101 and the handle segment 102 is less than 180 °. In an alternative embodiment, as shown in fig. 7, the support section 101 is provided with a reinforcing rib 103, and the thickness of the support section 101 is reduced, so that the moment of inertia of the support section during a collision can be effectively reduced, and the risk that the steering column adjustment handle 1 is opened during the collision is reduced.

In order to more clearly describe and embody a method of determining the operation force of the steering column adjustment handle provided in the present application, a specific example will be explained below.

As shown in fig. 1, the method for determining the operation force of the steering column adjustment handle comprises the following specific steps:

s101, adjusting the mass of a steering column adjusting handle 1;

as shown in fig. 2, the steering column adjustment handle 1 is made thin, and the steering column adjustment handle 1 is provided with a bead 103, thereby achieving the purpose of reducing the weight of the steering column adjustment handle 1.

S102, determining the installation position of the steering column adjusting handle 1;

as shown in fig. 2, the steering column adjustment handle 1 is mounted below the steering wheel 7.

S103, determining the acceleration of the steering column;

as shown in fig. 3, by mounting a bidirectional acceleration sensor on the steering column 6 of a vehicle, acquiring vehicle acceleration data of the vehicle under an impact condition of a 40% offset crash velocity of 72Km/h by the bidirectional acceleration sensor, collecting the vehicle acceleration at least three times to obtain a vehicle acceleration data set, taking the maximum value of the acceleration as a target acceleration of the steering column 6, the steering column acceleration being a partial acceleration Ax in the positive direction of the x-axis, and a partial acceleration Az in the positive direction of the z-axis.

S104, calculating the minimum opening moment of the steering column adjusting handle according to the installation position of the steering column adjusting handle 1 and the acceleration of the steering column;

determining the mass of the steering column adjustment handle 1, that is, determining the mass m of the steering column adjustment handle 1 adjusted in step S101, where m is 0.121Kg, and the mass of the steering column adjustment handle 1 before adjustment is 0.175 Kg;

determining the mass center of the steering column adjusting handle 1, specifically, as shown in fig. 3, point O is the mass center of the steering column adjusting handle 1;

the moment arm value is obtained according to the mass center of the steering column adjusting handle 1, as can be seen from fig. 3, the vertical distance dz from the mass center O point to the x axis is 0.077105m, and the vertical distance dx from the mass center to the z axis is 0.032288 mm;

obtaining the inertia force of the steering column adjusting handle 1 according to the mass of the steering column adjusting handle 1 and the acceleration of the steering column; from the above analysis, the calculation formulas of the inertial force Fiz and Fix are as follows:

fiz formula (1) m × Az … …

Fix ═ m × Ax … … equation (2)

Wherein Fiz is in the opposite direction to Az and Fix is in the opposite direction to Ax;

obtaining the gravity of the steering column adjusting handle 1 according to the mass of the steering column adjusting handle 1; as shown in fig. 5, the vertical distance dg between the gravity of the steering column adjustment handle 1 and the z' axis is 0.060858 mm;

obtaining the resultant moment M of the steering column adjusting handle according to the inertia force of the steering column adjusting handle 1, the gravity of the steering column adjusting handle 1 and the force arm value; the formula for obtaining the resultant torque of the steering column adjusting handle according to the formula (1) and the formula (2) is as follows:

formula (3) of M × Fiz × dx + Fix × dz + G × dg ═ M × Az × dx + M × Ax × dz + M × G × dg … …

Through the analysis, the minimum opening moment M of the steering column adjusting handle can be known_open-minThe calculation formula of (a) is as follows:

M_open-minformula (4) of not less than M … …

Measuring Az at the same time when M is maximum_max＝196m/s²And Ax_maz＝645m/s²And g acceleration of gravity of 9.8m/s²Substituting the above numerical values into equation (3) yields a maximum M of 0.121 × 196 × 0.032288+0.121 × 645 × 0.077105+0.121 × 9.8.8 9.8 × 0.060858 of 6.86Nm, and from equation (4), M is found to be M_open-min＝6.86Nm。

S105, setting the operation force of the steering column adjusting handle according to the minimum opening torque of the steering column adjusting handle;

determining the operating arm of force of the steering column adjusting handle 1; as shown in fig. 6, the arm L of force of the steering column adjusting handle operating force is determined to be 0.17 m;

the following formula of the operation force of the steering column adjusting handle can be obtained according to the formula (3) and the formula (4):

F＝M_open-min/L … … formula (5)

In practice, however, the manufacturing tolerance M of the opening torque of the steering column adjusting handle is taken into consideration₁Therefore, the formula (5) needs to be corrected, that is,

F＝(M_open-min+M₁) Formula (6) of/L … …;

from the above calculation, M_open-min6.86Nm, and M₁As shown in formula (6), F ═ M, which is 0.6Nm_open-min+M₁)/L＝(6.86+0.6)/0.17＝44N

And S106, verifying the operation force of the steering column adjusting handle.

The steering column 6 is manufactured according to the requirement of the minimum opening force of the steering column adjusting handle to carry out a collision test, specifically, a newly manufactured steering column 6 sample is required to carry out the collision test according to the requirement that the operating force F of the steering column adjusting handle is 44N, and after multiple times of collision test verification, the steering column adjusting handle 1 is in a closed state in the collision process.

After the collision test, the design of the operating force of the steering column adjusting handle 1 is reasonable, safe, reliable and comfortable.

The above description is only exemplary of the present application and should not be taken as limiting, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.