CN113758733B - System and method for testing connection reliability of steering wheel and clock spring - Google Patents
System and method for testing connection reliability of steering wheel and clock spring Download PDFInfo
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- CN113758733B CN113758733B CN202110968063.6A CN202110968063A CN113758733B CN 113758733 B CN113758733 B CN 113758733B CN 202110968063 A CN202110968063 A CN 202110968063A CN 113758733 B CN113758733 B CN 113758733B
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- 238000001514 detection method Methods 0.000 claims abstract description 13
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- 230000009471 action Effects 0.000 description 4
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- 238000005859 coupling reaction Methods 0.000 description 3
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- 238000009434 installation Methods 0.000 description 3
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M17/00—Testing of vehicles
- G01M17/007—Wheeled or endless-tracked vehicles
- G01M17/06—Steering behaviour; Rolling behaviour
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
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Abstract
The application relates to a system and a method for testing connection reliability of a steering wheel and a clock spring, wherein the steering wheel and the clock spring are connected through a plug connector according to preset assembly tolerance, and the steering wheel and the clock spring are both arranged on a steering column; the test system comprises a test box, a vibrating table, a driving device, a detection device and a control device, wherein the vibrating table is arranged in the test box and is used for fixing a steering column; the driving device is used for being connected with the steering wheel; the detection device is connected with the plug connector and is used for collecting a conduction signal of the plug connector; the control device is connected with the vibrating table, the driving device and the detection device and is used for controlling the vibrating table to vibrate and controlling the driving device to drive the steering wheel and the steering column to rotate and drive the clock spring to rotate; and the plug connector is also used for judging whether the plug connector is disconnected or not according to the on signal and verifying whether the preset assembly tolerance is qualified or not.
Description
Technical Field
The application relates to the technical field of automobile testing, in particular to a system and a method for testing connection reliability of a steering wheel and a clock spring.
Background
The steering wheel is fixed on the steering column by a bolt, and the steering column transmits the torque on the steering wheel to the steering gear to drive the steering gear to work so as to achieve the effect of controlling the running direction of the automobile. The clock spring is a key electric rotary connector used in the steering wheel of the automobile, and mainly comprises a flexible flat cable, a rotor and a shell which rotate relatively, a wire harness (a conductive outgoing line) and a connector, and is generally arranged below the steering wheel of the automobile, and in the left and right rotation actions of the steering wheel, the reliable electric connection of electric parts such as a front airbag, a horn switch and the like between two relative rotating parts can be ensured, and if the clock spring fails, the normal functions of the airbag, an angle sensor for power steering and the horn on the steering wheel can be influenced.
In the related art, an automobile clock spring durability test device is disclosed, which comprises a rack, an industrial personal computer with a display, a servo motor arranged on the rack, a motor driver connected with the servo motor, and a test fixture for fixing a clock spring to be tested, wherein a motion control card is arranged in the industrial personal computer, the industrial personal computer is connected with the motor driver through the motion control card, and the test fixture is rotatably arranged on a test support.
However, the durability of the clock spring in the scheme simply refers to the quality of the clock spring, and the assembly tolerance between the clock spring and the steering wheel is not instructive for actual production and assembly under the condition that the connection between the clock spring and the steering wheel is reliable.
Disclosure of Invention
The embodiment of the application provides a system and a method for testing connection reliability of a steering wheel and a clock spring, which are used for solving the problem that assembly tolerance between the clock spring and the steering wheel is not instructive for actual production and assembly under the condition that connection reliability between the clock spring and the steering wheel cannot be determined in related technologies.
In a first aspect, a system for testing connection reliability of a steering wheel and a clock spring is provided, wherein the steering wheel and the clock spring are connected through a plug connector according to preset assembly tolerance, and the steering wheel and the clock spring are both installed on a steering column; the test system includes:
a test chamber;
the vibration table is arranged in the test box and used for fixing the steering column;
a driving device for connection with a steering wheel;
the detection device is connected with the plug connector and is used for collecting a conduction signal of the plug connector;
the control device is connected with the vibrating table, the driving device and the detection device and is used for controlling the vibrating table to vibrate and controlling the driving device to drive the steering wheel and the steering column to rotate and driving the clock spring to rotate; and the plug connector is also used for judging whether the plug connector is disconnected or not according to the on signal and verifying whether the preset assembly tolerance is qualified or not.
In some embodiments, when the mounting frame of the steering wheel is located at the first position and the second position, the vertical distance between the plug connector and the mounting frame is a first distance and a second distance, respectively;
assembly tolerances are defined as: a difference between the second distance and the first distance;
the plug connector has a normal assembly state and a limit assembly state;
when in a normal assembly state, the preset assembly tolerance is a normal assembly tolerance, and when in a limit assembly state, the preset assembly tolerance is a limit assembly tolerance, and the normal assembly tolerance is smaller than the limit assembly tolerance.
In some embodiments, the normal assembly tolerance is less than 1mm and the limit assembly tolerance is greater than 3mm.
In some embodiments, when the mounting frame is rotated to the first position, the mounting frame is in a direction pointed at 12 o' clock of the steering wheel; when the mounting frame is rotated to the second position, the mounting frame is in the 6 o' clock direction of the steering wheel.
In some embodiments, the vibration table comprises:
a horizontally arranged vibration table frame;
the upper surface of the mounting table is obliquely arranged and is matched with the actual mounting angle of the steering wheel.
In some embodiments, the driving device includes:
a clamping jaw for clamping the steering wheel;
and the motor is connected with the test box, and the driving shaft of the motor is connected with the clamping jaw and is used for driving the steering wheel to rotate through the clamping jaw.
In some embodiments, the jaw comprises:
a connecting plate connected to the drive shaft;
the clamping space is formed between the two clamping plates and used for clamping spokes of the steering wheel; and the inner side of the clamping plate is concavely provided with an arc groove, and the arc groove is matched with the outer surface of the spoke.
In a second aspect, a method for testing connection reliability of a steering wheel and a clock spring is provided, the method comprising the steps of:
providing the test system described above;
fixing the steering column to the vibrating table;
controlling the vibrating table to vibrate, driving the steering wheel and the steering column to rotate, and driving the clock spring to rotate;
collecting a conduction signal of the plug connector;
judging whether the plug connector is disconnected according to the conducting signal, and verifying whether the preset assembly tolerance is qualified;
if the conduction signal does not meet the conduction condition, judging that the plug connector is disconnected, and determining that the preset assembly tolerance is unqualified;
if the conduction signal meets the conduction condition, judging that the plug connector is not disconnected, and determining that the preset assembly tolerance is qualified.
In some embodiments:
when the mounting frame of the steering wheel is positioned at a first position and a second position, the vertical distance between the plug connector and the mounting frame is respectively a first distance and a second distance;
the tolerance is defined as: a difference between the second distance and the first distance;
the plug connector has a normal assembly state and a limit assembly state;
when in a normal assembly state, the preset assembly tolerance is a normal assembly tolerance, and when in a limit assembly state, the preset assembly tolerance is a limit assembly tolerance, and the normal assembly tolerance is smaller than the limit assembly tolerance;
judging whether the plug connector is disconnected or not, and verifying whether the preset assembly tolerance is qualified or not, wherein the method specifically comprises the following steps of:
when the normal assembly tolerance is qualified and the limit assembly tolerance is qualified, taking the normal assembly tolerance and the limit assembly tolerance as a target normal assembly tolerance and a target limit assembly tolerance of the steering wheel and the clock spring;
when the normal assembly tolerance is qualified and the limit assembly tolerance is not qualified, reducing the limit assembly tolerance and re-verifying whether the limit assembly tolerance is qualified;
and when the normal assembly tolerance is not qualified and the limit assembly tolerance is not qualified, reducing the normal assembly tolerance and the limit assembly tolerance, and re-verifying whether the normal assembly tolerance and the limit assembly are qualified or not.
In some embodiments, the conducting condition is that a resistance value of a connection line of the plug is greater than 7Ω, and a duration is greater than 200ns.
The embodiment of the application provides a test system and a test method for connection reliability of a steering wheel and a clock spring, and the test system and the test method are characterized in that the steering wheel, the clock spring and the steering column are installed in a test box, the steering wheel and the clock spring are connected through connectors according to preset assembly tolerance to simulate the actual installation state of the steering wheel in a vehicle, the vibrating table drives the steering wheel to vibrate, the jolt road surface is simulated, the driving device drives the steering column to rotate, the steering durability of the steering wheel is realized, and the real vehicle use environment is simulated through temperature and humidity in the test box, so that the reliability of connection of the steering wheel and the clock spring after the jolt road surface and the steering durability test of the steering wheel are verified. In the process, the plug connector can move in the mounting frame, and the detection device is used for collecting the conduction signal of the wire harness on the plug connector to judge whether the wire harness on the plug connector is disconnected, so that whether the preset assembly tolerance is qualified is verified, and the guiding effect is achieved for the actual assembly of the steering wheel and the clock spring.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a test system for connection reliability between a steering wheel and a clock spring according to an embodiment of the present application;
FIG. 2 is a schematic diagram of a use state of a system for testing connection reliability of a steering wheel and a clock spring according to an embodiment of the present disclosure;
FIG. 3 is a schematic view of a steering wheel mounting frame according to an embodiment of the present disclosure in a first position;
FIG. 4 is a schematic view of a mounting frame of a steering wheel in a second position according to an embodiment of the present disclosure;
fig. 5 is a schematic structural diagram of a driving device according to an embodiment of the present application.
In the figure: 1. a steering wheel; 10. a first position; 11. a second position; 12. a mounting frame; 2. a clock spring; 3. a steering column; 4. a test chamber; 5. a vibration table; 50. a vibrating table frame; 51. a mounting table; 6. a plug-in component; 7. a driving device; 70. a clamping jaw; 700. a connecting plate; 701. a clamping plate; 71. a motor; 8. a detection device; 9. and a control device.
Detailed Description
For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of 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, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present application based on the embodiments herein.
Example 1:
applicants have found after repeated experimentation and verification that: the general connection mode between the steering wheel 1 and the clock spring 2 is as follows: the steering wheel 1 is provided with a mounting frame 12, the steering wheel 1 is connected with a male end of the plug connector 6, the clock spring 2 is connected with a female end of the plug connector 6, the clock spring 2 is connected with the steering wheel 1 through butt joint of the male end and the female end of the plug connector 6, and the plug connector 6 after butt joint is positioned in the mounting frame 12; in the rotating process of the steering wheel 1, the plug connector 6 is driven to move in the mounting frame 12, and the plug connector 6 is expected to be always positioned at the exact center of the mounting frame 12 in an ideal state, but because the actual assembly state is that the clock spring 2 is mounted on the steering column 3, the steering wheel 1 is also mounted on the steering column 3, the three cannot be absolutely coaxial, assembly tolerance exists between the steering wheel 1 and the clock spring 2, the plug connector 6 can not always be positioned at the exact center of the mounting frame 12 in the rotating process of the steering wheel 1, but can move in the mounting frame 12, so that the wire harness connected with the plug connector 6 is continuously pulled back and forth, and the clock spring 2 is invalid, therefore, design experiments are required to verify whether the wire harness connected with the plug connector 6 is disconnected in the life cycle of the vehicle, and the clock spring 2 is invalid due to the fact that the target assembly tolerance is found, and the clock spring 2 is not invalid in the whole life cycle of the vehicle.
In order to solve the above-mentioned problems, referring to fig. 1 and 2, embodiment 1 of the present application provides a system for testing connection reliability of a steering wheel and a clock spring, wherein the steering wheel 1 and the clock spring 2 are connected by a plug-in unit 6 according to a preset assembly tolerance, and the steering wheel 1 and the clock spring 2 are mounted on a steering column 3; the test system comprises a test box 4, a vibrating table 5, a driving device 7, a detection device 8 and a control device 9, wherein the test box 4 is a temperature and humidity control box, and the temperature and humidity in the test box 4 can be adjusted by setting the temperature and humidity; the vibrating table 5 is arranged in the test box 4 and is used for fixing the steering column 3; the driving device 7 is also arranged in the test box 4 and is used for being connected with the steering wheel 1; the detection device 8 is connected with the plug connector 6 and is used for collecting a conduction signal of the plug connector 6; the control device 9 is connected with the vibrating table 5, the driving device 7 and the detecting device 8 and is used for controlling the vibrating table 5 to vibrate and controlling the driving device 7 to drive the steering wheel 1 and the steering column 3 to rotate and drive the clock spring 2 to rotate; and the plug connector 6 is also used for judging whether the plug connector is disconnected or not according to the on signal and verifying whether the preset assembly tolerance is qualified or not.
The working principle of the test system of embodiment 1 of the present application is as follows:
the steering wheel 1, the clock spring 2 and the steering column 3 are installed in the test box 4, the steering wheel 1 and the clock spring 2 are connected according to preset assembly tolerance through the plug connector 6, the actual installation state of the steering wheel 1 in a vehicle is simulated, the steering wheel 1 is driven to vibrate through the vibrating table 5, a bumpy road surface is simulated, the steering wheel 1 is driven to rotate around the steering column 3 through the driving device 7, steering durability of the steering wheel 1 is achieved, and the real vehicle use environment is simulated through setting of the temperature and humidity in the test box 4, so that reliability of connection of the steering wheel 1 and the clock spring 2 after the bumpy road surface and steering durability test of the steering wheel 1 are verified. In the process, the plug connector 6 can move in the mounting frame 12, and the detection device 8 is used for collecting the conduction signal of the wire harness on the plug connector 6 to judge whether the wire harness on the plug connector 6 is disconnected, so that whether the preset assembly tolerance is qualified is verified, and the guiding effect is played for the actual assembly of the steering wheel 1 and the clock spring 2.
Referring to fig. 3 and 4, when the mounting frame 12 of the steering wheel 1 is located at the first position 10 and the second position 11, the vertical distance between the plug connector 6 and the mounting frame 12 is the first distance L1 and the second distance L2, specifically, the distance from the top end or the center of the plug connector 6 to the top end of the mounting frame 12, where the top ends refer to the top ends when the steering wheel 1 is in the return state; wherein, assembly tolerance is defined as: the difference between the second distance and the first distance, i.e., L2-L1; the plug 6 has a normal assembled state and a limit assembled state; when in the normal assembly state, the preset assembly tolerance is the normal assembly tolerance, and when in the limit assembly state, the preset assembly tolerance is the limit assembly tolerance, and the normal assembly tolerance is smaller than the limit assembly tolerance.
The steering wheel 1 rotates, so that the mounting frame 12 rotates from the first position 10 to the second position 11, and the plug connector 6 is driven to move in the mounting frame 12 in the rotating process of the steering wheel 1, so that assembly tolerance is generated; when the plug connector 6 is in a normal assembly state, the movable amplitude of the plug connector 6 in the mounting frame 12 is small, and the pulling degree of the plug connector on the wire harness is also small; when the plug connector 6 is in a limit assembly state, the plug connector 6 can move in the mounting frame 12 to a large extent, and the pulling degree of the wire harness is also large; therefore, in embodiment 1 of the present application, by verifying whether the normal assembly tolerance and the limit assembly tolerance are qualified in the normal assembly state and the limit assembly state, the qualified normal assembly tolerance and the limit assembly tolerance are determined to instruct the assembly of the actual steering wheel 1 and the clock spring 2, so as to ensure that the clock spring 2 will not fail in the steering process of the steering wheel 1.
Preferably, the normal assembly tolerance is less than 1mm and the limit assembly tolerance is greater than 3mm.
When the plug 6 is in the normal assembled state:
1) According to the angle of 25 degrees of the real vehicle, fixing the steering column 3 on the vibrating table 5, wherein the tightening torque is 20NM;
2) After centering and adjusting the clock spring 2, fixing the clock spring on the steering column 3, wherein the tightening torque is 4NM;
3) According to the angle of the real vehicle, adopting an M16 bolt to assemble the steering wheel 1, wherein the torque is 35NM;
4) Normal assembly tolerances are less than 1mm;
5) The air bag of the steering wheel 1 is assembled and the whole system is placed in the test chamber 4.
When the plug 6 is in the limit assembled state:
1) Fixing the steering column 3 on a vibrating table according to the actual vehicle angle of 25 degrees, wherein the tightening torque is 20NM;
2) The clock spring 2 is fixed on the steering column 3, and the tightening torque is 4NM;
3) According to the angle of the real vehicle, adopting an M16 bolt to assemble the steering wheel 1, wherein the torque is 35NM;
4) The limit assembly tolerance is greater than 3mm;
5) The air bag of the steering wheel 1 is assembled and the whole system is placed in the test chamber 4.
Preferably, as seen in fig. 3 and 4, when the mounting frame 12 is rotated to the first position 10, the mounting frame 12 is in the direction of 12 o' clock of the steering wheel 1; when the mounting frame 12 is rotated to the second position 11, the mounting frame 12 is in the direction indicated by 6 o' clock of the steering wheel 1.
Alternatively, the vibration table 5 includes a vibration table 50 horizontally disposed and a mount table 51 provided on the vibration table 50, and an upper surface of the mount table 51 is obliquely disposed and adapted to an actual mounting angle of the steering wheel 1.
The mounting table 51 is arranged to enable the steering wheel 1 to be matched with the mounting angle of the real vehicle, so that the actual mounting state of the steering wheel 1 in the real vehicle is simulated.
Further, referring to fig. 5, the driving device 7 includes a clamping jaw 70 and a motor 71, wherein the clamping jaw 70 is used for clamping the steering wheel 1; a motor 71 is connected to the test chamber 4 and its drive shaft is connected to the clamping jaw 70 and is used to drive the steering wheel 1 in rotation via the clamping jaw 70.
Two schemes for realizing the rotation of the steering wheel 1 are as follows:
1. a spoke for turning a steering wheel 1: the driving shaft of the motor 71 is connected with the clamping jaw 70 by using an elastic coupling, so that the connection stability is high, but a gap exists between the clamping jaw 70 and the spoke, a certain deviation exists in rotation precision, and accumulated errors of repeated positioning exist, wherein the error is about 2.5 times of the reserved gap between the clamping jaw 70 and the spoke.
2. The other is that the clamping jaw 70 clamps the outer ring of the steering wheel 1, and a loading shaft coaxial with the shaft of the steering wheel 1 is led out, and the loading shaft is connected with the driving shaft of the motor 71 through a universal expansion coupling. The vibration table 5 moves up and down, the universal expansion coupling can ensure that no interference is generated in vibration, and the tool ensures that the two ends of the universal shaft are parallel, so that the motion transmitted by the motor 71 is accurate and uniform. However, the motor 71 is stationary due to the vibration of the steering column 3, and the universal expansion joint is vulnerable.
Further, in the first embodiment, the clamping jaw 70 includes a connecting plate 700 and two clamping plates 701 respectively disposed at two sides of the connecting plate 700, and the connecting plate 700 is connected to the driving shaft; a clamping space for clamping spokes of the steering wheel 1 is formed between the two clamping plates 701; and the inner side of the clamping plate 701 is concavely provided with an arc groove which is matched with the outer surface of the spoke.
By providing an arcuate slot to increase the contact area between the clamping plate 701 and the spokes, friction is increased and stability of the jaw 70 is improved.
Example 2:
embodiment 2 of the present application provides a method for testing connection reliability of a steering wheel and a clock spring, the method comprising the following steps:
s1: providing a test system;
s2: fixing the steering column 3 to the vibrating table 5;
s3: the vibration table 5 is controlled to vibrate, and meanwhile, the steering wheel 1 is driven to rotate around the steering column 3 and the clock spring 2 is driven to rotate;
s4: collecting a conduction signal of the plug connector 6;
s5: judging whether the plug connector 6 is disconnected according to the on signal, and verifying whether a preset assembly tolerance is qualified;
s6: if the conduction signal does not meet the conduction condition, judging that the plug connector 6 is disconnected, and determining that the preset assembly tolerance is unqualified;
s7: if the conduction signal meets the conduction condition, judging that the plug connector 6 is not disconnected, and determining that the preset assembly tolerance is qualified.
The test process comprises the following steps:
first, a vibration signal, which is a vibration signal for testing the noise of the steering wheel 1, is input, and the cycle of vibration (sinusoidal excitation) is defined as follows: the bump road was simulated by scanning from 10Hz to 100Hz and then from 100Hz to 10Hz at a longitudinal acceleration of 10m/s2 and a scanning speed of 0.2 Hz/s.
Then, the initial position of the steering wheel 1 is in a counter-clockwise dead state, the steering durable motion of the steering wheel 1 is started, the steering wheel 1 is rotated to the rightmost end in the clockwise direction, and then the steering wheel 1 is rotated to the leftmost end in the counter-clockwise direction, and the cycle is that the number of times of repetition, the temperature requirement and the steering frequency are shown in the table 1 in detail.
Finally, judging experimental results:
in the experimental process, collecting the conducting signals of the wire harness of the plug connector 6 in real time, judging whether the plug connector 6 is disconnected according to the conducting signals, and verifying whether the preset assembly tolerance is qualified;
if the conduction signal does not meet the conduction condition, judging that the plug connector 6 is disconnected, and determining that the preset assembly tolerance is unqualified;
if the conduction signal meets the conduction condition, judging that the plug connector 6 is not disconnected, and determining that the preset assembly tolerance is qualified.
This application embodiment 2 is through shaking table 5 drive steering wheel 1 vibration, and simulate the road surface of jolting to and through drive arrangement 7 drive steering wheel 1 rotation around steering column 3, realize steering wheel 1 turn to durable, but also through setting up the humiture in the test box 4, simulate real car service environment, thereby verify behind the road surface of jolting, and steering wheel 1 turn to durable test, the reliability of the connection of steering wheel 1 and clock spring 2. In the process, the plug connector 6 can move in the mounting frame 12, and the detection device 8 is used for collecting the conduction signal of the wire harness on the plug connector 6 to judge whether the wire harness on the plug connector 6 is disconnected, so that whether the preset assembly tolerance is qualified is verified, and the guiding effect is played for the actual assembly of the steering wheel 1 and the clock spring 2.
Preferably, when the mounting frame 12 of the steering wheel 1 is located at the first position 10 and the second position 11, the vertical distance between the plug connector 6 and the mounting frame 12 is a first distance and a second distance respectively; wherein, assembly tolerance is defined as: a difference between the second distance and the first distance; the plug 6 has a normal assembled state and a limit assembled state; when in a normal assembly state, the preset assembly tolerance is a normal assembly tolerance, and when in a limit assembly state, the preset assembly tolerance is a limit assembly tolerance, and the normal assembly tolerance is smaller than the limit assembly tolerance;
the steering wheel 1 rotates, so that the mounting frame 12 rotates from the first position 10 to the second position 11, and the plug connector 6 is driven to move in the mounting frame 12 in the rotating process of the steering wheel 1, so that assembly tolerance is generated; when the plug connector 6 is in a normal assembly state, the movable amplitude of the plug connector 6 in the mounting frame 12 is small, and the pulling degree of the plug connector on the wire harness is also small; when the plug connector 6 is in a limit assembly state, the plug connector 6 can move in the mounting frame 12 to a large extent, and the pulling degree of the wire harness is also large; therefore, in embodiment 1 of the present application, by verifying whether the normal assembly tolerance and the limit assembly tolerance are qualified in the normal assembly state and the limit assembly state, the qualified normal assembly tolerance and the limit assembly tolerance are determined to instruct the assembly of the actual steering wheel 1 and the clock spring 2, so as to ensure that the clock spring 2 will not fail in the steering process of the steering wheel 1.
Judging whether the plug connector 6 is disconnected or not, and verifying whether a preset assembly tolerance is qualified or not, wherein the method specifically comprises the following steps:
s50: when the normal assembly tolerance is qualified and the limit assembly tolerance is qualified, the normal assembly tolerance and the limit assembly tolerance are used as the target normal assembly tolerance and the target limit assembly tolerance of the steering wheel 1 and the clock spring 2;
when the normal assembly tolerance is qualified and the limit assembly tolerance is qualified, the preset assembly tolerance is qualified, and in the real vehicle installation, the target assembly tolerance between the steering wheel 1 and the clock spring 2 can be assembled according to the normal assembly tolerance and the range contained by the limit assembly tolerance, so that the connection reliability of the steering wheel 1 and the clock spring 2 is ensured.
S51: when the normal assembly tolerance is qualified and the limit assembly tolerance is not qualified, reducing the limit assembly tolerance and re-verifying whether the limit assembly tolerance is qualified;
when the normal assembly tolerance is qualified and the limit assembly tolerance is not qualified, the limit assembly tolerance is excessively large, so that the limit assembly tolerance needs to be reduced, whether the new limit assembly tolerance is qualified is re-verified, until the qualified limit assembly tolerance is determined, and the normal assembly tolerance and the qualified limit assembly tolerance are used as the target normal assembly tolerance and the target limit assembly tolerance of the steering wheel 1 and the clock spring 2.
S52: when the normal assembly tolerance is not qualified and the limit assembly tolerance is not qualified, the normal assembly tolerance and the limit assembly tolerance are reduced, and whether the normal assembly tolerance and the limit assembly are qualified or not is verified again.
When the normal assembly tolerance is not qualified and the limit assembly tolerance is not qualified, the normal assembly tolerance and the limit assembly tolerance are both large, and the normal assembly tolerance and the limit assembly tolerance need to be reduced until the qualified normal assembly tolerance and the qualified limit assembly tolerance are determined, and the qualified normal assembly tolerance and the qualified limit assembly tolerance are used as the target normal assembly tolerance and the target limit assembly tolerance of the steering wheel 1 and the clock spring 2.
Optionally, the conducting condition is that the resistance value of the connection line of the plug connector 6 is greater than 7Ω, and the duration is greater than 200ns.
If the on signal does not satisfy: judging that the plug connector 6 is disconnected and determining that the preset assembly tolerance is unqualified if the resistance value of the connecting line of the plug connector 6 is greater than 7Ω and the duration is greater than 200 ns;
if the on signal satisfies: and if the resistance value of the connecting line of the plug connector 6 is greater than 7Ω and the duration is greater than 200ns, judging that the plug connector 6 is not disconnected, and determining that the preset assembly tolerance is qualified.
In the description of the present application, it should be noted that the azimuth or positional relationship indicated by the terms "upper", "lower", etc. are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of description of the present application and simplification of the description, and are not indicative or implying that the apparatus or element in question must have a specific azimuth, be configured and operated in a specific azimuth, and thus should not be construed as limiting the present application. Unless specifically stated or limited otherwise, the terms "mounted," "connected," and "coupled" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.
It should be noted that in this application, relational terms such as "first" and "second" and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises an element.
The foregoing is merely a specific embodiment of the application to enable one skilled in the art to understand or practice the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. A steering wheel and clock spring connection reliability test system, the steering wheel (1) and the clock spring (2) are connected according to the preset assembly tolerance through a plug connector (6), and the steering wheel (1) and the clock spring (2) are both arranged on a steering column (3); the test system is characterized by comprising:
a test chamber (4);
a vibration table (5) which is arranged in the test box (4) and is used for fixing the steering column (3);
a drive (7) for connection to the steering wheel (1);
the detection device (8) is connected with the plug connector (6) and is used for collecting a conduction signal of the plug connector (6);
the control device (9) is connected with the vibrating table (5), the driving device (7) and the detection device (8) and is used for controlling the vibrating table (5) to vibrate and controlling the driving device (7) to drive the steering wheel (1) and the steering column (3) to rotate and drive the clock spring (2) to rotate; the plug connector (6) is further used for judging whether the plug connector is disconnected or not according to the conducting signal, and verifying whether the preset assembly tolerance is qualified or not;
when the mounting frame (12) of the steering wheel (1) is positioned at the first position (10) and the second position (11), the vertical distance between the plug connector (6) and the mounting frame (12) is respectively a first distance and a second distance;
assembly tolerances are defined as: a difference between the second distance and the first distance;
the plug connector (6) has a normal assembly state and a limit assembly state;
when in a normal assembly state, the preset assembly tolerance is a normal assembly tolerance, and when in a limit assembly state, the preset assembly tolerance is a limit assembly tolerance, and the normal assembly tolerance is smaller than the limit assembly tolerance.
2. The steering wheel to clock spring connection reliability test system of claim 1 wherein said normal assembly tolerance is less than 1mm and said limit assembly tolerance is greater than 3mm.
3. A steering wheel and clock spring connection reliability test system according to claim 1, characterized in that the mounting frame (12) is in the direction of 12 o' clock of the steering wheel (1) when the mounting frame (12) is rotated to the first position (10); when the mounting frame (12) is rotated to the second position (11), the mounting frame (12) is in the direction indicated by 6 o' clock of the steering wheel (1).
4. A system for testing the reliability of a connection of a steering wheel to a clock spring according to claim 1, characterized in that said oscillating table (5) comprises:
a horizontally arranged vibration table (50);
and the mounting table (51) is arranged on the vibration table frame (50), and the upper surface of the mounting table (51) is obliquely arranged and is matched with the actual mounting angle of the steering wheel (1).
5. A steering wheel and clock spring connection reliability testing system according to claim 1, characterized in that the driving means (7) comprise:
-a clamping jaw (70) for clamping the steering wheel (1);
a motor (71) connected to the test chamber (4) and having a drive shaft (72) connected to the clamping jaw (70) and adapted to drive the steering wheel (1) in rotation via the clamping jaw (70).
6. The system for testing the reliability of a steering wheel and clock spring connection according to claim 5, wherein said clamping jaw (70) comprises:
a connection plate (700) connected to the drive shaft (72);
two clamping plates (701) which are respectively arranged at two sides of the connecting plate (700), wherein a clamping space for clamping spokes of the steering wheel (1) is formed between the two clamping plates (701); and the inner side of the clamping plate (701) is concavely provided with an arc groove which is matched with the outer surface of the spoke.
7. The method for testing the connection reliability of the steering wheel and the clock spring is characterized by comprising the following steps of:
providing a test system according to claim 1;
-fixing the steering column (3) to the vibrating table (5);
controlling the vibration table (5) to vibrate, driving the steering wheel (1) and the steering column (3) to rotate, and driving the clock spring (2) to rotate;
collecting a conduction signal of the plug connector (6);
judging whether the plug connector (6) is disconnected according to the conducting signal, and verifying whether the preset assembly tolerance is qualified;
if the conduction signal does not meet the conduction condition, judging that the plug connector (6) is disconnected, and determining that the preset assembly tolerance is unqualified;
if the conduction signal meets the conduction condition, judging that the plug connector (6) is not disconnected, and determining that the preset assembly tolerance is qualified.
8. The method for testing the reliability of the connection between a steering wheel and a clock spring according to claim 7, wherein:
when the mounting frame (12) of the steering wheel (1) is positioned at the first position (10) and the second position (11), the vertical distance between the plug connector (6) and the mounting frame (12) is respectively a first distance and a second distance;
the tolerance is defined as: a difference between the second distance and the first distance;
the plug connector (6) has a normal assembly state and a limit assembly state;
when in a normal assembly state, the preset assembly tolerance is a normal assembly tolerance, and when in a limit assembly state, the preset assembly tolerance is a limit assembly tolerance, and the normal assembly tolerance is smaller than the limit assembly tolerance;
judging whether the plug connector (6) is disconnected or not, and verifying whether the preset assembly tolerance is qualified or not, wherein the method specifically comprises the following steps:
when the normal assembly tolerance is qualified and the limit assembly tolerance is qualified, taking the normal assembly tolerance and the limit assembly tolerance as a target normal assembly tolerance and a target limit assembly tolerance of the steering wheel (1) and the clock spring (2);
when the normal assembly tolerance is qualified and the limit assembly tolerance is not qualified, reducing the limit assembly tolerance and re-verifying whether the limit assembly tolerance is qualified;
and when the normal assembly tolerance is not qualified and the limit assembly tolerance is not qualified, reducing the normal assembly tolerance and the limit assembly tolerance, and re-verifying whether the normal assembly tolerance and the limit assembly are qualified or not.
9. The method for testing the connection reliability of a steering wheel and a clock spring according to claim 7, wherein the conducting condition is that the resistance value of the connection line of the plug connector (6) is more than 7Ω and the duration is more than 200ns.
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| CN202110968063.6A CN113758733B (en) | 2021-08-23 | 2021-08-23 | System and method for testing connection reliability of steering wheel and clock spring |
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| CN202110968063.6A CN113758733B (en) | 2021-08-23 | 2021-08-23 | System and method for testing connection reliability of steering wheel and clock spring |
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| CN113758733A CN113758733A (en) | 2021-12-07 |
| CN113758733B true CN113758733B (en) | 2024-01-16 |
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