CN112781891A

CN112781891A - Method for testing ISOFIX (International standards organization FIX) fixed point of vehicle

Info

Publication number: CN112781891A
Application number: CN202011625788.7A
Authority: CN
Inventors: 王中华; 彭锟; 冯星星; 李广旭; 陈志璞
Original assignee: China Automotive Engineering Research Institute Co Ltd
Current assignee: China Automotive Engineering Research Institute Co Ltd
Priority date: 2020-12-31
Filing date: 2020-12-31
Publication date: 2021-05-11

Abstract

The invention relates to the technical field of automobile part testing, in particular to a method for testing an ISOFIX (International standards organization FIX) fixed point of a vehicle, which comprises the following steps: s1, placing the sliding block at the retraction position, and placing the front end clamping groove of the guide rod at the position, close to the middle, of the lower fixed point rod; applying pressure to place the guide rod, and adjusting the placing angle of the guide rod; recording the inclination angle by using an angle measuring instrument on the guide rod; s2, recording colors from the front edge of the window on the sliding block, and recording the result as the depth of a lower fixed point in the seat back; the upper window of the sliding block sequentially comprises five color grids with different colors, and each color grid represents the depth of 2 mm; s3, applying a force on the dynamometer at an oblique angle slides the slider toward the seat back and attaches to a lower vehicle anchor point. This scheme can provide the relevant standard of ISOFIX interface for vehicle host computer factory to solve the problem that the installation difficulty appears in the in-process that children's safety seat user used.

Description

Method for testing ISOFIX (International standards organization FIX) fixed point of vehicle

Technical Field

The invention relates to the technical field of automobile part testing, in particular to a method for testing an ISOFIX (International standards organization FIX) fixed point of a vehicle.

Background

Along with the popularization of household cars, parents have more and more chances to take children out of a journey, and the accompanying problem is the safety and convenience of taking a car by children. In recent years, automobile development designers have installed child seats in automobile seats in order to provide more effective protection for children when riding in the vehicle.

In order to adapt to the installation of a child safety seat, GB14167-2013 "car belt mounting fixing point, ISOFIX fixing point system and pull-up strap fixing point" explicitly specifies that vehicles of class M1 must be equipped with an ISOFIX interface. Briefly, the ISOFIX points are a pair of steel rings disposed on the rear seat of the vehicle, and the child safety seat is provided with an ISOFIX assembly which can then be snapped onto the steel rings. Since the standard implementation, the number of ISOFIX interface positions on the vehicle has been greatly increased, and the frequency of using the child safety seat in the travel of the child is promoted.

However, since a vehicle manufacturer and a child seat manufacturer are manufacturing enterprises in two fields, a host manufacturer has no experience or standard related to the ISOFIX interface of the vehicle, and does not consider whether the ISOFIX interface is convenient for a consumer to use during a vehicle development process, so that a child safety seat user has installation difficulty during the use process, and the child seat is easy to interfere with a vehicle backrest after being installed.

Therefore, there is an urgent need for a vehicle ISOFIX anchor point test method that can facilitate user installation of a child safety seat.

Disclosure of Invention

The invention aims to provide a method for testing ISOFIX (International standards organization FIX) fixed points of a vehicle, which can solve the problem that a child safety seat user is difficult to install in the using process.

The basic scheme provided by the invention is as follows: a method for testing an ISOFIX fixed point of a vehicle comprises the following steps:

s1, placing the sliding block at the retraction position, and placing the front end clamping groove of the guide rod at the position, close to the middle, of the lower fixed point rod; applying pressure to place the guide rod, and adjusting the placing angle of the guide rod; recording the inclination angle by using an angle measuring instrument on the guide rod;

s2, recording colors from the front edge of the window on the sliding block, and recording the result as the depth of a lower fixed point in the seat back; the upper window of the sliding block sequentially comprises five color grids with different colors, and each color grid represents the depth of 2 mm;

s3, exerting force on the dynamometer along the inclination angle to slide the sliding block towards the seat backrest and connect the sliding block to the lower fixed point of the vehicle until the yellow in the color of the reference window on the sliding block is completely exposed, and recording the maximum pushing force in the whole sliding process to obtain a connecting force;

s4, measuring the gap angle of the fixed point under the ISOFIX by using a gap angle measuring tool; mounting a clearance angle measuring tool in the middle of the lower fixed point rod, applying a vertical upward force on the dynamometer and recording a clearance angle;

s5, measuring and recording the length of the seat back and the distance from a fixed point on ISOFIX to the highest point of the seat back;

s6, measuring and recording the distance between the ISOFIX identification and the upper fixed point.

Further, step S0 is included before step S1, the vehicle is kept still, and the vehicle is adjusted to be horizontal; and adjusting the seat back to the design position.

Further, the step S4 includes a step S41 of determining whether an obstacle around the lower fixed point would cause the clearance angle measuring tool to be unable to be connected to the lower fixed point, and if so, recording the abnormal condition.

Further, step S42 is included after step S41, and it is determined whether the gap angle measuring tool cannot be connected to the lower fixing point, and if so, the gap angle measuring item of the lower fixing point fails.

Further, the step S2 includes a step S21 of determining whether the depth of the ISOFIX lower fixing point relative to the seat back parting line is greater than 20mm, and if so, it is required that the upper surface and the lower surface of the measuring tool must be capable of contacting with the seat back and the seat cushion at the same time, and the guide bar must not contact with the seat cushion.

Further, the step S5 specifically includes the step S51 of determining whether the bottom of the seat back is covered by the fabric, and if so, removing the fabric for measurement.

Further, the step S51 is followed by a step S52 of determining whether the seat back is lower than the floor of the luggage region, and if so, taking the floor surface as the lowest measured end.

Further, step S53 is included after step S52, and it is determined whether the seat can contact the lowest end of the seat back when the seat is in the slide rail final position, and if so, the seat slide rail is adjusted to the final position for measurement.

Further, the step S6 further includes a step S61, determining whether the distance between the ISOFIX identifier and the upper fixed point is greater than a preset distance threshold, and if so, determining that the item detection fails.

Further, the void angle is greater than 50 °; the preset distance threshold is 50 mm; the magnitude of the vertical force is 22 + -0.5N.

The working principle and the advantages of the invention are as follows:

according to the scheme, based on the problem that a child safety seat user is difficult to install in the using process, the technical scheme is provided for a host factory through five plates of depth measurement, installation angle measurement, connecting force measurement, gap angle measurement and upper fixed point inspection; the gap that the current domestic vehicle does not have ISOFIX fixed point requirement is filled up, the technologies of a host factory and a child safety seat factory are combined, a convenient mode is provided for the installation of the child seat, the circulation of products is promoted, and consumers are served.

Description (name interpretation): the highest point of the seat back is defined as a repeated transverse line of the highest end of the seat position, and the seat back does not comprise a seat headrest and a safety belt fixing device;

the bottom of the seat back, which is a repeated horizontal line at the bottom of the seat, moves along the seat adjusting device.

Drawings

FIG. 1 is a flowchart of a first embodiment of a method for testing ISOFIX fixing points of a vehicle according to the present invention.

Detailed Description

The following is further detailed by the specific embodiments:

example one

A method for testing an ISOFIX fixed point of a vehicle, substantially as shown in fig. 1, comprising the steps of:

s0, keeping the vehicle stationary, and adjusting the vehicle to be horizontal; and adjusting the seat back to a design position;

s1, placing the sliding block at the retraction position, and placing the front end clamping groove of the guide rod at the position, close to the middle, of the lower fixed point rod; applying pressure to place the guide rod, and adjusting the placing angle of the guide rod; recording the inclination angle by using an angle measuring instrument on the guide rod; wherein the retracted position is such that the front surface of the upper end of the slide block is in contact with the seat back and the lower surface of the lower end is in contact with the seat cushion, and if both conditions cannot be met simultaneously, it is first met that the lower surface of the lower end of the slide block is in contact with the seat cushion; the purpose of placing the guide rod by applying pressure in the scheme is to prevent the guide rod from sliding down from the middle position of the fixing point rod placed under the ISOFIX; the angle of placement of adjustment guide bar also mainly can in order to let the upper surface of sliding block and lower surface front end and cushion contact.

S2, recording colors from the front edge of the window on the sliding block, and recording the result as the depth of a lower fixed point in the seat back; the window on the sliding block sequentially comprises five color grids with different colors (white, red, blue, yellow and green), and the depth represented by one color grid is 2 mm; the corresponding relation between the color and the depth is specified in the ISOFIX standard, when the color grid is green, the depth of the reaction is 2mm, the next color grid of the green is yellow, the color grid represents the depth of 4mm, the blue represents the depth of 6mm, and the depth superposition is carried out by the same method, and mainly a qualitative test is carried out on the depth of a lower fixed point in the seat backrest; in this embodiment, step S2 further includes step S21, determining whether the depth of the ISOFIX lower fixing point relative to the seat back parting line is greater than 20mm, and if so, requiring that the upper surface and the lower surface of the measuring tool must be able to contact with the seat back and the seat cushion at the same time, and the guide bar must not contact with the seat cushion.

S3, applying a force on the dynamometer along the inclination angle to slide the slider toward the seat back and connect to the lower vehicle fixing point until the yellow color of the reference window on the slider has been fully exposed, recording the maximum pushing force throughout the sliding process, and obtaining the connecting force. Wherein: the value of the maximum thrust needs to be less than 150N.

S4, measuring a gap angle of a fixed point under the ISOFIX (in the embodiment, the gap angle needs to be more than 50 degrees) by using a gap angle measuring tool; mounting a clearance angle measuring tool in the middle of the lower fixed point rod, applying a vertical upward force on the dynamometer (the application of the vertical force can be in a mode of pushing upwards or pulling upwards, and the magnitude of the vertical force needs to be controlled to be 22 +/-0.5N), and recording the clearance angle; specifically, the step S4 further includes a step S41 of determining whether the obstacle around the lower fixed point would cause the clearance angle measuring tool to be unable to be connected to the lower fixed point, and if so, recording the abnormal condition; step S42 is further included after step S41, and it is determined whether the gap angle measuring tool cannot be connected to the lower fixed point, and if so, the gap angle measuring item at the lower fixed point fails.

S5, measuring and recording the length of the seat back and the distance from a fixed point on ISOFIX to the highest point of the seat back; in this embodiment, S5 specifically includes step S51, determining whether the bottom of the seat back is covered by fabric, and if so, removing the fabric for measurement; step S52 is further included after step S51, whether the seat back is lower than the floor of the luggage placement area is judged, and if yes, the floor surface is used as the lowest measurement end; step S53 is also included after step S52, and it is determined whether the seat can contact the lowest end of the seat back when the seat is in the slide rail last position, and if so, the seat slide rail is adjusted to the last position for measurement.

S6, measuring and recording the distance between the ISOFIX identification and the upper fixed point; specifically, step S6 is followed by step S61 of determining whether the distance between the ISOFIX identifier and the upper fixed point is greater than a preset distance threshold, and if so, determining that the item detection fails. Specifically, since the upper fixed point must have an internationally required identifier within a distance range of 50mm, the preset distance threshold in the present embodiment is set to 50 mm.

This scheme provides the test method about vehicle ISOFIX fixed point for the host computer factory through depth measurement, installation angle measurement, connection force measurement, space angle measurement and go up these five aspects of fixed point inspection respectively, combines together the technique of host computer factory and children's safety seat factory, can facilitate for the in-process of children's seat user in the use and installation.

Example two

Compared with the first embodiment, the difference is that the method further comprises step S11, judging whether the lower fixing point is shielded, if shielding is needed, the shielding object can be retracted when in use, and the shielding object does not exist before the lower fixing point in the installation process; and S12, judging whether the position of the lower fixed point is on the backrest, if so, requiring that the position of the lower fixed point is in the region of more than 85% of the whole backrest length.

EXAMPLE III

Compared with the first embodiment, the difference is that the dynamometer in step S3 specifically uses a digital display dynamometer, the front surface of the digital display dynamometer is provided with a display screen and a button, the top of the digital display dynamometer is provided with a connection port, and the connection port is used for being in threaded fastening connection with one end of a measured object.

The digital display dynamometer comprises a digital display dynamometer shell and a shell, wherein the shell is fixed on the back of the digital display dynamometer, has the same shape and size as the digital display dynamometer shell and is a cuboid; a balance blending device, a level device, a processing chip and a buzzer are fixed in the shell; wherein:

the balance allocation device comprises a balancing weight, a conveying chain, a first gear, a second gear and a motor, wherein the first gear is positioned at the top of the shell, the second gear is positioned at the bottom of the shell, and the first gear and the second gear are both rotationally connected with the shell; two ends of the transmission chain are respectively fixed on the first gear and the second gear, and the transmission chain is tensioned after being fixed on the gears; an output shaft of the motor is fixed in a central hole of the second gear and used for driving the second gear to rotate, so that the vertical conveying chain can move, and the principle of the vertical conveying chain is similar to that of the existing conveying belt; the balancing weight bonds in the intermediate position department of conveyer belt.

The level device comprises a horizontally placed pipe body, two ends of the pipe body are sealed and are respectively positioned at the top and the bottom of the shell, the pipe body is hollow, steel balls are arranged in the pipe body, and the steel balls are in sliding connection with the pipe body; a plurality of contacts are fixed on the inner wall of the tube body at intervals; in the scheme, in the initial state, namely when the pipe body is horizontally placed on the workbench, the steel balls are positioned in the middle of the pipe body; on the body inner wall, the preceding back of steel ball is equipped with three contact respectively, and the spacing distance is 2.5cm, is equipped with 7 contacts on the inner wall altogether promptly, and the intermediate position is one, and the top and the bottom plate of body are respectively one, then set up two contacts that the spacing distance equals between the middle part and the top of body respectively, and in the same way, set up two contacts that the spacing distance equals between the middle part and the bottom of body respectively. The connecting wires of the contacts are respectively and electrically connected with the input port of the processing chip, and the output port of the processing chip is respectively and electrically connected with the buzzer and the motor through signals.

Based on the structure, the method also comprises the step S31 of conducting the contact at the middle position when the steel ball is positioned at the middle position of the tube body, receiving a trigger signal through the processing chip, driving the buzzer to sound and prompting a user to keep a horizontal state;

and step S32, when the steel ball leaves the middle position of the tube body and slides to other contacts in the tube body, determining the inclination direction according to the conduction of other contacts, generating a control instruction according to the inclination direction, driving the output shaft of the motor to rotate through the control instruction, enabling the transmission chain to drive the balancing weight to move towards the direction opposite to the direction of the steel ball, and stopping driving the output shaft of the motor to rotate when the contact at the middle position is conducted. For example, when a user performs a horizontal force measurement on a hand-held digital display load cell, the digital display load cell is not held horizontally and the digital display load cell tilts slightly backwards. The situation is shown in a level device, a steel ball in a pipe body leaves from a middle position and moves towards the bottom of the pipe body, because the inclination angle is not large, the steel ball stays at a first contact position behind the middle position, the contact at the position is conducted, a trigger signal is received by a processing chip, and a motor is driven to rotate according to the trigger signal, so that a conveying chain moves forwards, a balancing weight on the conveying chain is driven to move forwards, the gravity of the balancing weight acts on the front end, and the horizontal force is balanced; similarly, if the digital display dynamometer inclines forwards in the process of testing the horizontal force, the conveying chain can drive the balancing weight to move backwards, so that the integral gravity center is convenient to adjust, and the digital display dynamometer is kept in a horizontal state.

By adopting the scheme, whether the digital display dynamometer keeps a horizontal state can be detected through the level meter, and the buzzer is driven to make a sound when the digital display dynamometer is in the horizontal state, so that a user can know that the currently detected state is horizontal; and finally, the movement of the steel ball in the level gauge guides the movement of the balancing weight, the dynamic adjustment of the configuration block can be realized, and when the digital display measuring instrument is in a non-horizontal state, the balancing weight in the balance allocation device assists the digital display measuring instrument to keep horizontal, so that the numerical value stability of the digital display measuring instrument is ensured, and the effectiveness and the accuracy of a test result are improved.

The foregoing is merely an example of the present invention, and common general knowledge in the field of known specific structures and characteristics is not described herein in any greater extent than that known in the art at the filing date or prior to the priority date of the application, so that those skilled in the art can now appreciate that all of the above-described techniques in this field and have the ability to apply routine experimentation before this date can be combined with one or more of the present teachings to complete and implement the present invention, and that certain typical known structures or known methods do not pose any impediments to the implementation of the present invention by those skilled in the art. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.

Claims

1. The method for testing the ISOFIX fixed point of the vehicle is characterized by comprising the following steps:

2. The method for testing the ISOFIX fixing point of a vehicle according to claim 1, wherein: step S0 is further included before the step S1, the vehicle is kept still, and the vehicle is adjusted to be horizontal; and adjusting the seat back to the design position.

3. The method for testing the ISOFIX fixing point of a vehicle according to claim 2, characterized in that: the step S4 further includes a step S41 of determining whether an obstacle around the lower fixed point would cause the clearance angle measuring tool to be unable to connect to the lower fixed point, and if so, recording the abnormal condition.

4. The method for testing the ISOFIX fixing point of a vehicle according to claim 3, characterized in that: step S42 is further included after step S41, and it is determined whether the clearance angle measuring tool cannot be connected to the lower fixing point, and if so, the clearance angle measuring item of the lower fixing point fails.

5. The method for testing the ISOFIX fixing point of a vehicle according to claim 4, wherein: the step S2 further includes a step S21 of determining whether the depth of the ISOFIX lower fixing point relative to the seat back parting line is greater than 20mm, and if so, it is required that the upper surface and the lower surface of the measuring tool must be capable of contacting with the seat back and the seat cushion at the same time, and the guide bar must not contact with the seat cushion.

6. The method for testing the ISOFIX fixing point of a vehicle according to claim 5, wherein: the step S5 further includes step S51, determining whether the bottom of the seat back is covered by fabric, and if so, removing the fabric for measurement.

7. The method for testing the ISOFIX fixing point of a vehicle according to claim 6, wherein: the step S51 is followed by a step S52 of determining whether the seat back is lower than the floor of the luggage region, and if so, taking the floor surface as the lowest measured end.

8. The method for testing the ISOFIX fixed point of the vehicle according to claim 7, wherein: and step S53 is further included after the step S52, whether the seat can contact the lowest end of the seat back when the seat is at the slide rail final position is judged, and if so, the seat slide rail is adjusted to the final position for measurement.

9. The method for testing the ISOFIX fixed point of the vehicle according to claim 8, wherein: the step S6 further includes a step S61, determining whether the distance between the ISOFIX identifier and the upper fixed point is greater than a preset distance threshold, and if so, determining that the item detection fails.

10. The method for testing the ISOFIX fixed point of the vehicle according to claim 9, wherein: the void angle is greater than 50 °; the preset distance threshold is 50 mm; the magnitude of the vertical force is 22 + -0.5N.