CN110887673A - Safety belt reliability test system - Google Patents
Safety belt reliability test system Download PDFInfo
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- CN110887673A CN110887673A CN201911199377.3A CN201911199377A CN110887673A CN 110887673 A CN110887673 A CN 110887673A CN 201911199377 A CN201911199377 A CN 201911199377A CN 110887673 A CN110887673 A CN 110887673A
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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
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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 invention provides a safety belt reliability test system, which relates to the technical field of automobile tests and comprises the following components: the safety belt to be tested comprises a safety belt to be tested, a lock catch, a lock tongue, a control circuit and a stroke control device; one end of the safety belt to be tested is connected with the bottom of the lock catch body of the lock catch, and the other end of the safety belt to be tested is fixed on the test bed; the stroke control device is positioned above the lock catch body and is respectively connected with the lock tongue and the control circuit; the control circuit is used for controlling the position of the bolt relative to the lock catch by controlling the state of the stroke control device; when the travel control device controls the spring bolt to reach the bottom of the opening and the lock is locked at the first preset time of the opening, the travel control device drives the lock catch to move upwards to enable the safety belt to be tested to be in a stretching state during testing, and after the second preset time, the travel control device controls the spring bolt to be unlocked. The scheme of the invention improves the efficiency and the accuracy of the safety belt reliability test.
Description
Technical Field
The invention relates to the technical field of automobile tests, in particular to a safety belt reliability test system.
Background
Nowadays, automobiles become daily required vehicles, automobile safety belts are one of important parts of a whole automobile safety part system, when a road traffic accident happens to the automobile, the automobile safety belts protect members on the automobile to play a very important protection role, and the design of ensuring the strength of the safety belts is critical for realizing a good protection effect of the safety belts.
In the prior art, the reliability test of the safety belt needs manual work, so that the reliability test process is complex and the test effect is inaccurate.
Disclosure of Invention
The invention aims to provide a safety belt reliability testing system, so that the problems of complex safety belt testing process and poor testing effect in the prior art are solved.
In order to achieve the above object, the present invention provides a safety belt reliability test system, including: the safety belt to be tested comprises a safety belt to be tested, a lock catch, a lock tongue, a control circuit and a stroke control device;
one end of the safety belt to be tested is connected with the bottom of the lock catch body of the lock catch, and the other end of the safety belt to be tested is fixed on the test bed;
the travel control device is positioned above the lock catch body and is respectively connected with the lock tongue and the control circuit;
the control circuit is used for controlling the position of the bolt relative to the lock catch by controlling the state of the stroke control device;
when the travel control device controls the spring bolt to reach the bottom of the opening of the lock catch body and the time of locking in the opening reaches a first preset time, the travel control device drives the lock catch to move upwards to enable the safety belt to be tested to be in a tensile state during testing, and after a second preset time, the travel control device controls the spring bolt to be unlocked.
Optionally, the safety belt reliability testing system further includes: a guide sleeve;
the guide sleeve is fixed on the test bed through bolt connection, and the lock catch body is arranged in the guide sleeve and can move along the axial direction of the guide sleeve.
Optionally, the stroke control device includes: a locking stroke control device and an unlocking stroke control device;
the locking stroke control device is connected with the lock tongue and is positioned right above the opening;
the control circuit controls the locking stroke control device to move downwards, so that the lock tongue is inserted into the opening and is in a locking state; after the lock tongue is locked in the opening, the control circuit controls the locking stroke control device to drive the lock tongue to move upwards, so that the safety belt to be tested is in a tensile state during testing;
the unlocking travel control device is positioned right above an unlocking button in the lock catch body;
and after the time that the safety belt to be tested is in the stretching state reaches the second preset time, the control circuit controls the unlocking stroke control device to move downwards, and the unlocking stroke control device enables the lock tongue to be unlocked by pressing the unlocking button.
Optionally, the locking stroke control device includes:
the first cylinder is positioned right above the opening, and the lock tongue is fixed at the end part of a piston rod of the first cylinder;
the first electromagnetic directional valve is respectively connected with the first cylinder and the control circuit;
the first overflow valve is connected with the first electromagnetic directional valve;
the first air pump is connected with the first overflow valve;
when the control circuit controls a first electromagnetic coil of the first electromagnetic directional valve to be electrified, a first valve core of the first electromagnetic directional valve moves towards a first direction, so that the first air pump is communicated with the bottom of the first air cylinder through the first overflow valve and the first electromagnetic directional valve, a piston rod of the first air cylinder is controlled to extend outwards, and the lock tongue is locked in the opening;
after the lock tongue is locked in the opening for the first preset time, the control circuit controls a second electromagnetic coil of the first electromagnetic directional valve to be electrified, a first valve core of the first electromagnetic directional valve moves towards a second direction, so that the first air pump is communicated with the rod end of the first air cylinder through the first overflow valve and the first electromagnetic directional valve, a piston rod of the first air cylinder contracts inwards to drive the lock catch to move upwards, and the safety belt to be tested is in a stretching state;
after the safety belt to be tested is in a stretching state and reaches the second preset duration, the control circuit controls the first electromagnetic coil and the second electromagnetic coil to be powered off, so that the first valve core is located at the middle position, and two ends of a piston rod of the first air cylinder are communicated with the outside.
Optionally, the unlocking stroke control device includes:
a piston rod of the second cylinder is positioned right above the unlocking button;
the second electromagnetic directional valve is respectively connected with the second cylinder and the control circuit;
the second overflow valve is connected with the second electromagnetic directional valve;
the second air pump is connected with the second overflow valve;
after the second preset time, the control circuit controls a third electromagnetic coil of the second electromagnetic directional valve to be electrified, a second valve core of the second electromagnetic directional valve moves towards a third direction, the second air pump is communicated with the bottom of the second air cylinder through the second overflow valve and the second electromagnetic directional valve, a piston rod of the second air cylinder stretches outwards, and the unlocking button is pressed to unlock the lock tongue;
after the lock tongue is unlocked, the control circuit controls the third electromagnetic coil of the second electromagnetic directional valve to lose power, the second valve core moves towards the fourth direction, the second air pump is communicated with the rod end of the second air cylinder through the second overflow valve and the second electromagnetic directional valve, and the piston rod of the second air cylinder contracts inwards to enable the unlocking button to be in a free state.
Optionally, the control circuit includes a pressure switch, one end of the pressure switch is connected to a negative electrode of a power supply of the control circuit, and the other end of the pressure switch is connected to a positive electrode of the power supply through a counter;
the pressure switch is positioned at the bottom of the opening of the lock catch body, when the lock tongue is inserted into the opening and locked, the pressure switch is closed, so that the power supply, the pressure switch and the counter form a closed loop, and the counting value of the counter is increased by one.
Optionally, the control circuit includes:
a first stationary contact of the three-position switch is connected with a negative electrode of a power supply of the control circuit; the first movable contact of the three-position switch is connected with the first fixed contact, and the second fixed contact of the three-position switch is connected with the positive pole of the power supply through the main switch and the first electromagnetic coil of the first electromagnetic reversing valve; a third fixed contact of the three-position switch is connected with the positive pole of the power supply through a second electromagnetic coil of the first electromagnetic reversing valve;
the first time relay, the first control signal input end is connected with the pressure switch, and the first control signal output end is connected with the first movable contact of the three-position switch;
when the pressure switch is closed, sending a first timing signal to the first time relay; and when the first time relay times to the first preset time, the first time relay sends a switching signal to the first movable contact, so that the first movable contact is connected with a third fixed contact.
Optionally, the control circuit further includes:
a second time relay, wherein a second control signal input end is connected with a third fixed contact of the three-position switch, a fourth fixed contact is connected with the negative electrode of the power supply, a second movable contact is connected with one end of a travel switch, and the other end of the travel switch is connected with the negative electrode of the power supply through a third electromagnetic coil of the second electromagnetic reversing valve;
when the first movable contact is connected with the third fixed contact, a second timing signal is sent to the second time relay, after the second preset time is reached, the second movable contact of the second time relay is connected with the fourth fixed contact, a third electromagnetic coil of the second electromagnetic reversing valve is electrified, and after the second cylinder reaches the stroke, the travel switch is disconnected and a switching signal is sent to the first movable contact, so that the first movable contact of the three-position switch is connected with the second fixed contact.
Optionally, the control circuit further includes: the system comprises an acceleration sensor, a normally open first acceleration relay, a normally closed second acceleration relay and an indicator light;
wherein the acceleration sensor is mounted on a piston rod of the first cylinder;
the control ends of the first acceleration relay and the second acceleration relay are connected with the acceleration sensor;
the first acceleration relay, the indicator light and the second acceleration relay are connected in series between the positive pole and the negative pole of the power supply;
when the second time relay does not count time to a second preset time and the acceleration sensor detects that the acceleration of the piston rod of the first cylinder is greater than a preset value, the first acceleration relay is controlled to be closed, the indicator light is enabled to be lightened, and the second acceleration relay is controlled to be disconnected.
Alternatively to this, the first and second parts may,
the positive pole of the power supply is respectively connected with the first electromagnetic coil, the second electromagnetic coil and the third electromagnetic coil through the second acceleration relay and a counting relay;
the third movable contact of the counting relay is respectively connected with the first electromagnetic coil, the second electromagnetic coil and the third electromagnetic coil, the fifth stationary contact of the counting relay is connected with the second acceleration relay, and the third control input end of the counting relay is connected with the counter;
when the counter counts to a preset value, the counter sends a control signal to the counting relay to enable the counting relay to be disconnected.
The technical scheme of the invention at least has the following beneficial effects:
according to the safety belt reliability testing system, the safety belt to be tested is fixed between the lock catch and the test bed, the spring bolt is connected with the stroke control device, the stroke control device is controlled to move downwards through the control circuit, the spring bolt is locked in the lock catch, the stroke control device is further controlled to move upwards through the control circuit, the lock catch is driven to move upwards, and the safety belt to be tested is tensioned; the safety belt reliability testing device realizes automatic testing of the reliability of the safety belt to be tested, and improves the testing efficiency and the accuracy of the testing result.
Drawings
FIG. 1 is a schematic view of a seat belt to be tested in connection with a buckle according to an embodiment of the present invention;
FIG. 2 is a schematic view of a latch according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a control circuit according to an embodiment of the present invention;
fig. 4 is a schematic view of a lock-up stroke control apparatus according to an embodiment of the present invention;
fig. 5 is a schematic view of an unlocking stroke control device according to an embodiment of the present invention.
Description of reference numerals:
1-a safety belt to be tested, 2-a lock catch, 21-a lock catch body, 22-an opening, 23-an unlocking button, 3-a guide sleeve, 41-a first air cylinder, 42-a first electromagnetic reversing valve, 421-a first electromagnetic coil, 422-a second electromagnetic coil, 43-a first overflow valve, 44-a first air pump, 51-a second air cylinder, 52-a second electromagnetic reversing valve, 521-a third electromagnetic coil, 53-a second overflow valve, 54-a second air cylinder, 601-a pressure switch, 602-a power supply, 603-a counter, 604-a three-position switch, 605-a main switch, 606-a first time relay, 607-a second time relay, 608-a travel switch, 609-an acceleration sensor and 610-a first acceleration relay, 611-second acceleration relay, 612-indicator light, 613-counting relay, a-first stationary contact, b-first moving contact, c-second stationary contact, d-third stationary contact.
Detailed Description
In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments.
Aiming at the problems of complex safety belt reliability test process and poor test effect in the prior art, the invention provides the safety belt reliability test system, which realizes automatic safety belt reliability test, improves the test efficiency and obtains better test effect.
Referring to fig. 1 to 5, a safety belt reliability testing system according to an embodiment of the present invention includes: the safety belt to be tested comprises a safety belt 1 to be tested, a lock catch 2, a lock tongue, a control circuit and a stroke control device;
one end of the safety belt 1 to be tested is connected with the bottom of the lock catch body 21 of the lock catch 2, and the other end of the safety belt to be tested is fixed on the test bed;
the stroke control device is positioned above the lock catch body 21 and is respectively connected with the lock tongue and the control circuit;
the control circuit is used for controlling the position of the bolt relative to the lock catch 2 by controlling the state of the stroke control device;
when the travel control device controls the bolt to reach the bottom of the opening 22 of the lock catch body 21 and the locking time in the opening 22 reaches a first preset time, the travel control device drives the lock catch 2 to move upwards, so that the safety belt 1 to be tested is in a tensile state during testing, and after a second preset time, the travel control device controls the bolt to be unlocked.
In the safety belt reliability testing system of the embodiment of the invention, one end of the safety belt 1 to be tested is connected with the test bed, the other end is connected with the lock catch body 21, after the control circuit has locked the bolt in said opening 22 by controlling the stroke control means, by again controlling the stroke control means to move upwards, so that the lock catch 2 moves upwards along with the stroke control device to realize the stretching of the safety belt 1 to be tested, after the control circuit times to a second preset time, the control circuit automatically controls the travel control device to move so as to unlock the lock tongue, the control circuit can circularly control the stroke control device to act, the safety belt 1 to be tested is automatically subjected to reliability test, and compared with a manual reliability test, the test efficiency is improved and the test effect is more accurate and reliable.
As shown in fig. 1 and 2, the safety belt reliability testing system according to the embodiment of the present invention further includes a guide sleeve 3, wherein the guide sleeve 3 is fixed on the test bed by a bolt connection, and the lock catch body 21 is disposed in the guide sleeve 3 and is movable in an axial direction of the guide sleeve 3.
In the embodiment of the invention, the lock catch body 21 is arranged to be capable of moving along the axial direction of the guide sleeve 3, so that when the lock tongue is locked in the opening 22, the stroke control device drives the lock catch body 21 to move, and the safety belt 1 to be tested is in a tensile state during testing.
Optionally, the stroke control device includes: a lock-up stroke control device shown in fig. 4 and an unlock stroke control device shown in fig. 5;
on one hand, the locking stroke control device is connected with the lock tongue and is positioned right above the opening 22; the locking stroke control device is used for inserting the lock tongue into the opening 22 and is in a locking state; the specific working process of the locking stroke control device is as follows:
the control circuit controls the locking stroke control device to move downwards, so that the lock tongue is inserted into the opening 22 and is in a locking state; after the lock tongue is locked in the opening 22 for a first preset time, the control circuit controls the locking stroke control device to drive the lock tongue to move upwards, so that the safety belt 1 to be tested is in a stretching state during testing; in this step, the time length of the locking tongue locked in the opening 22 is timed, so that the locking tongue can be stably locked in the opening 22.
On the other hand, the unlocking stroke control device is positioned right above the unlocking button 23 in the lock catch body 21; the unlocking travel control device is used for pressing the unlocking button 23 to unlock the lock tongue, and the specific working process of the unlocking travel control device is as follows:
and after the time that the safety belt 1 to be tested is in the stretching state reaches the second preset time, the control circuit controls the unlocking stroke control device to move downwards, and the unlocking stroke control device enables the lock tongue to be unlocked by pressing the unlocking button 23.
Alternatively, as shown in fig. 4, the lock stroke control device includes:
a first cylinder 41 located right above the opening 22, and the latch is fixed to an end of a piston rod of the first cylinder 41;
a first electromagnetic directional valve 42 connected to the first cylinder 41 and the control circuit, respectively; the first electromagnetic directional valve 42 comprises a first electromagnetic coil 421, a first valve core, a second electromagnetic coil 422 and a first valve core, and the first electromagnetic coil 421 or the second electromagnetic coil 422 is connected in series in the control circuit to realize the movement of the first valve core or the first valve core, so as to achieve the function of direction change;
a first relief valve 43 connected to the first electromagnetic directional valve 42; for adjusting the tension to which the safety belt 1 to be tested is subjected;
the first air pump 44 is connected with the first overflow valve 43 and used for pushing the piston rod of the first air cylinder 41 to move so as to stretch the safety belt 1 to be tested;
specifically, the process of controlling the locking bolt to be locked in the opening 22 by the locking stroke control device is as follows: as shown in fig. 3, when the control circuit controls the first electromagnetic coil 421 of the first electromagnetic directional valve 42 to be electrified, the first valve core of the first electromagnetic directional valve 42 moves in a first direction, so that the first air pump 44 is communicated with the bottom of the first air cylinder 41 through the first relief valve 43 and the first electromagnetic directional valve 42, and the piston rod of the first air cylinder 41 is controlled to extend outward, so that the latch bolt is locked in the opening 22; referring to fig. 4, after the first valve spool moves in the first direction, the first direction switching solenoid valve 42 moves to the left side in fig. 4, so that the gas generated by the first gas pump 44 moves to the bottom of the first cylinder 41, thereby pushing the piston rod of the first cylinder 41 to expand outwards, and locking the locking tongue in the opening 22.
Specifically, the process of controlling the to-be-tested safety belt 1 to be in a stretching state by the locking stroke control device is as follows: as shown in fig. 3, after the tongue is locked in the opening 22 for the first preset time period, the control circuit controls the second electromagnetic coil 422 of the first electromagnetic directional valve 42 to be electrified, the first valve core of the first electromagnetic directional valve 42 moves towards the second direction, so that the first air pump 44 is communicated with the rod end of the first air cylinder 41 through the first overflow valve 43 and the first electromagnetic directional valve 42, the piston rod of the first air cylinder 41 contracts inwards, the lock catch 2 is driven to move upwards, and the safety belt 1 to be tested is in a stretched state; referring to fig. 4, after the first valve spool moves in the second direction, the first direction switching solenoid valve 42 moves to the right side in fig. 4, so that the gas generated by the first pump 44 moves to the rod end of the first cylinder 41, thereby pushing the piston rod of the first cylinder 41 to contract inward.
Specifically, as shown in fig. 3, after the to-be-tested safety belt 1 is in a stretched state for the second preset time period, the control circuit controls the first electromagnetic coil and the second electromagnetic coil to lose power, so that the first valve core is located at a middle position, and both ends of a piston rod of the first cylinder 41 are communicated with the outside.
Optionally, as shown in fig. 5, the unlocking stroke control device includes:
a second air cylinder 51, wherein a piston rod of the second air cylinder 51 is positioned right above the unlocking button 23;
a second electromagnetic directional valve 52 connected to the second cylinder 51 and the control circuit, respectively; the second electromagnetic directional valve 52 comprises a third electromagnetic coil 521 and a second valve core, and the third electromagnetic coil 521 is connected in series with the control circuit or is isolated from the control circuit, so that the movement of the second valve core is realized, and the function of direction change is achieved;
a second relief valve 5 connected to the second electromagnetic directional valve 52;
a second air pump 54 connected to the second relief valve 53; the piston rod is used for pushing the second cylinder 51 to move, so that the lock tongue is unlocked.
Specifically, the process of controlling the unlocking of the lock tongue by the unlocking stroke control device is as follows: after the second preset duration is reached, the control circuit controls the third electromagnetic coil 521 of the second electromagnetic directional valve 52 to be electrified, the second valve core of the second electromagnetic directional valve 52 moves towards a third direction, the second air pump 54 is communicated with the bottom of the second air cylinder 51 through the second overflow valve 53 and the second electromagnetic directional valve 52, the piston rod of the second air cylinder 51 stretches outwards, and the unlocking button 23 is pressed to unlock the lock tongue; referring to fig. 5, after the second valve core moves in the third direction, the second electromagnetic directional valve 52 moves to the right side of fig. 5, so that the gas generated by the second air pump 54 moves to the bottom of the second air cylinder 51, and the piston rod of the second air cylinder 51 is pushed to extend outward, so as to press the unlocking button 23, and the unlocking button 23 is in a free state.
After the lock tongue is unlocked, the control circuit controls the third electromagnetic coil 521 of the second electromagnetic directional valve 52 to lose power, the second valve core moves in the fourth direction, the second air pump 54 is communicated with the rod end of the second air cylinder 51 through the second overflow valve 53 and the second electromagnetic directional valve 52, and the piston rod of the second air cylinder 51 contracts inwards to drive the lock tongue to move upwards. Referring to fig. 5, after the second valve spool moves to the fourth direction, the second direction-changing solenoid valve 52 moves to the left side in fig. 5, so that the gas generated by the second air pump 54 moves to the rod end of the second air cylinder 51, and the piston rod of the second air cylinder 51 is pushed to contract inwards.
Optionally, as shown in fig. 3, the control circuit includes a pressure switch 601, one end of the pressure switch 601 is connected to a negative electrode of a power source 602 of the control circuit, and the other end is connected to a positive electrode of the power source 602 through a counter 603;
the pressure switch 601 is located at the bottom of the opening 22 of the lock catch body 21, and when the lock tongue is inserted into the opening 22 and locked, the pressure switch 601 is closed, so that the power supply 602, the pressure switch 601 and the counter 603 form a closed loop, and the count value of the counter 603 is increased by one.
In order to ensure that the number of tests of the seat belt 1 to be tested can meet the requirements, the counter 603 is provided in the embodiment, and when the pressure switch 601 is closed, namely: when the lock tongue is locked in the opening 22, the counting value of the counter is increased by one, namely the safety belt 1 to be tested is represented once again, so that the test times of the safety belt 1 to be tested are recorded, manual recording is avoided, and the accuracy of data recording is improved.
Optionally, as shown in fig. 3, the control circuit includes:
a three-position switch 604, wherein a first stationary contact a of the three-position switch 604 is connected with the negative electrode of the power supply 602 of the control circuit; the first moving contact b of the three-position switch 604 is connected with the first fixed contact a, and the second fixed contact c of the three-position switch 604 is connected with the positive pole of the power supply 602 through the main switch 605 and the first electromagnetic coil 421 of the first electromagnetic directional valve 42; the third stationary contact d of the three-position switch 604 is connected with the positive pole of the power supply 602 through the second electromagnetic coil 422 of the first electromagnetic directional valve 42;
a first time relay 606, a first control signal input end is connected with the pressure switch 601, and a first control signal output end is connected with a first movable contact b of the three-position switch 604;
specifically, when the pressure switch 601 is closed, a first timing signal is sent to the first time relay 606; when the first time relay 606 times to the first preset time, that is: when the lock tongue is determined to be locked in the opening 22, the first time relay 606 sends a switching signal to the first movable contact b, so that the first movable contact b is connected with a third fixed contact d.
It should be noted that, in this embodiment, at the beginning of the test, it is necessary to manually close the main switch 605 and connect the first movable contact b of the three-position switch 604 with the second fixed contact c; of course, it is also possible to automatically close the main switch 605 and connect the first movable contact b with the second stationary contact c by programming on the upper computer.
Optionally, the control circuit further includes:
and a second time relay 607, wherein a second control signal input end is connected with a third fixed contact d of the three-position switch 604, a fourth fixed contact is connected with the negative electrode of the power supply 602, a second movable contact is connected with one end of a travel switch 608, and the other end of the travel switch 608 is connected with the negative electrode of the power supply 602 through a third electromagnetic coil 521 of the second electromagnetic directional valve 52.
Specifically, when the first movable contact b is connected to the third fixed contact d, a second timing signal is sent to the second time relay 607, after the second preset time period is reached, the second movable contact of the second time relay 607 is connected to the fourth fixed contact, so that the third electromagnetic coil 521 of the second electromagnetic directional valve 52 is electrified, the second valve core is controlled to move in the third direction, the second air pump 54 is communicated with the bottom of the second air cylinder 51 through the second overflow valve 53 and the second electromagnetic directional valve 52, the piston rod of the second air cylinder 51 is extended outward, and after the second air cylinder 51 reaches a stroke, the stroke switch 608 is turned off and sends a switching signal to the first movable contact b, so that the first movable contact b of the three-position switch 604 is connected to the second fixed contact c.
Optionally, the control circuit further includes: an acceleration sensor 609, a normally open first acceleration relay 610, a normally closed second acceleration relay 611, and an indicator lamp 612;
wherein the acceleration sensor 609 is mounted on a piston rod of the first cylinder 41; for detecting the acceleration of the piston rod of the first cylinder 41 in real time;
the control ends of the first acceleration relay 610 and the second acceleration relay 611 are both connected with the acceleration sensor 609; and is configured to receive the control signal sent by the acceleration sensor 609 and execute a corresponding action according to the control signal.
Specifically, the first acceleration relay 610, the indicator lamp 612 and the second acceleration relay 611 are connected in series between the positive pole and the negative pole of the power supply 602; when the second time relay 607 does not count to a second preset time period and the acceleration sensor 609 detects that the acceleration of the piston rod of the first cylinder 41 is greater than a preset value, that is: when the safety belt 1 to be tested breaks, the first acceleration relay 610 is controlled to be closed, the indicator lamp 612 is lightened, and the second acceleration relay 611 is controlled to be opened. By closing the first acceleration relay 610, the power supply 602, the first acceleration relay 610, the second acceleration relay 611 and the indicator lamp 612 travel a closed loop, the indicator lamp 612 is turned on to remind a tester that the safety belt 1 to be tested is broken, and the second acceleration relay 611 is controlled to be opened, so that the whole loop of the control circuit is short-circuited, and the test is stopped.
Optionally, the positive pole of the power supply 602 is connected to the first electromagnetic coil 421, the second electromagnetic coil 422 and the third electromagnetic coil 521 through the second acceleration relay 611 and a counting relay 613 respectively;
wherein, the third movable contact of the counting relay 613 is respectively connected with the first electromagnetic coil 421, the second electromagnetic coil 422 and the third electromagnetic coil 521, the fifth stationary contact of the counting relay 613 is connected with the second acceleration relay 611, and the third control input end of the counting relay 613 is connected with the counter 603; when the counter 603 counts to a preset value, the counter 603 sends a control signal to the counting relay 613, so that the counting relay (613) is switched off, and the safety belt reliability test is completed.
According to the safety belt reliability testing system, the safety belt to be tested is fixed between the lock catch and the test bed, the spring bolt is connected with the stroke control device, the locking stroke control device is controlled to move downwards through the control circuit, the spring bolt is locked in the lock catch, the locking stroke control device is further controlled to move upwards through the control circuit, the lock catch is driven to move upwards, and the safety belt to be tested is tensioned; after the safety belt to be tested is tensioned for the second preset time, the control circuit controls the unlocking stroke control device to realize unlocking, and the bolt to which the worker belongs is locked in the lock catch, so that the automatic circular test on the reliability of the safety belt to be tested is realized, and the good protection effect of the safety belt and the safety of the whole vehicle are ensured.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. A safety belt reliability testing system, comprising: the safety belt testing device comprises a safety belt (1) to be tested, a lock catch (2), a lock tongue, a control circuit and a stroke control device;
one end of the safety belt (1) to be tested is connected with the bottom of the lock catch body (21) of the lock catch (2), and the other end of the safety belt to be tested is fixed on a test bed;
the stroke control device is positioned above the lock catch body (21) and is respectively connected with the lock tongue and the control circuit;
the control circuit is used for controlling the position of the bolt relative to the lock catch (2) by controlling the state of the stroke control device;
when the travel control device controls the spring bolt to reach the bottom of the opening (22) of the lock catch body (21) and the locking time in the opening (22) reaches a first preset time, the travel control device drives the lock catch (2) to move upwards, so that the safety belt (1) to be tested is in a tensile state during testing, and after a second preset time, the travel control device controls the spring bolt to unlock.
2. The seat belt reliability testing system of claim 1, further comprising: a guide sleeve (3);
the guide sleeve (3) is fixed on the test bed through bolt connection, and the lock catch body (21) is arranged in the guide sleeve (3) and can move along the axial direction of the guide sleeve (3).
3. The safety belt reliability testing system according to claim 1, characterized in that the stroke control means includes: a locking stroke control device and an unlocking stroke control device;
the locking stroke control device is connected with the lock tongue and is positioned right above the opening (22);
the control circuit controls the locking stroke control device to move downwards, so that the lock tongue is inserted into the opening (22) and is in a locking state; after the lock tongue is locked in the opening (22), the control circuit controls the locking stroke control device to drive the lock tongue to move upwards, so that the safety belt (1) to be tested is in a stretching state during testing;
the unlocking stroke control device is positioned right above an unlocking button (23) in the lock catch body (21);
and after the time that the safety belt (1) to be tested is in the stretching state reaches the second preset time, the control circuit controls the unlocking stroke control device to move downwards, and the unlocking stroke control device enables the lock tongue to be unlocked by pressing the unlocking button (23).
4. The safety belt reliability test system according to claim 3, wherein the lock-up stroke control means includes:
the first cylinder (41) is positioned right above the opening (22), and the bolt is fixed at the end part of a piston rod of the first cylinder (41);
a first electromagnetic directional valve (42) respectively connected with the first cylinder (41) and the control circuit;
a first relief valve (43) connected to the first electromagnetic directional valve (42);
the first air pump (44) is connected with the first overflow valve (43);
when a first electromagnetic coil (421) of the first electromagnetic directional valve (42) is controlled by the control circuit to be electrified, a first valve core of the first electromagnetic directional valve (42) moves towards a first direction, so that the first air pump (44) is communicated with the bottom of the first air cylinder (41) through the first overflow valve (43) and the first electromagnetic directional valve (42), a piston rod of the first air cylinder (41) is controlled to extend outwards, and the lock tongue is locked in the opening (22);
after the bolt is locked in the opening (22) for the first preset time, the control circuit controls a second electromagnetic coil (422) of the first electromagnetic directional valve (42) to be electrified, a first valve core of the first electromagnetic directional valve (42) moves towards a second direction, so that the first air pump (44) is communicated with a rod end of the first air cylinder (41) through the first overflow valve (43) and the first electromagnetic directional valve (42), a piston rod of the first air cylinder (41) contracts inwards to drive the lock catch (2) to move upwards, and the safety belt to be tested (1) is in a stretched state;
and after the safety belt (1) to be tested is in a stretched state and reaches the second preset time, the control circuit controls the first electromagnetic coil and the second electromagnetic coil to be powered off, so that the first valve core is positioned in the middle position, and two ends of a piston rod of the first air cylinder (41) are communicated with the outside.
5. The safety belt reliability testing system according to claim 4, wherein the unlocking stroke control means includes:
a second cylinder (51), a piston rod of the second cylinder (51) being located directly above the unlock button (23);
a second electromagnetic directional valve (52) which is respectively connected with the second cylinder (51) and the control circuit;
a second relief valve (53) connected to the second electromagnetic directional valve (52);
a second air pump (54) connected to the second relief valve (53);
after the second preset time is reached, the control circuit controls a third electromagnetic coil (521) of the second electromagnetic directional valve (52) to be electrified, a second valve core of the second electromagnetic directional valve (52) moves towards a third direction, the second air pump (54) is communicated with the bottom of the second air cylinder (51) through the second overflow valve (53) and the second electromagnetic directional valve (52), a piston rod of the second air cylinder (51) extends outwards, and the unlocking button (23) is pressed to unlock the lock tongue;
after the bolt is unlocked, the control circuit controls the third electromagnetic coil (521) of the second electromagnetic directional valve (52) to lose power, the second valve core moves towards the fourth direction, the second air pump (54) is communicated with the rod end of the second air cylinder (51) through the second overflow valve (53) and the second electromagnetic directional valve (52), and the piston rod of the second air cylinder (51) contracts inwards, so that the unlocking button (23) is in a free state.
6. The safety belt reliability test system according to claim 5, characterized in that the control circuit comprises a pressure switch (601), one end of the pressure switch (601) is connected with the negative pole of the power supply (602) of the control circuit, and the other end is connected with the positive pole of the power supply (602) through a counter (603);
the pressure switch (601) is located at the bottom of the opening (22) of the lock catch body (21), when the lock tongue is inserted into the opening (22) and locked, the pressure switch (601) is closed, so that the power source (602), the pressure switch (601) and the counter (603) form a closed loop, and the counting value of the counter (603) is increased by one.
7. The seat belt reliability test system of claim 6, wherein the control circuit comprises:
a three-position switch (604), a first stationary contact (a) of the three-position switch (604) being connected to a negative pole of a power supply (602) of the control circuit; the first movable contact (b) of the three-position switch (604) is connected with the first fixed contact (a), and the second fixed contact (c) of the three-position switch (604) is connected with the positive pole of the power supply (602) through a main switch (605) and a first electromagnetic coil (421) of the first electromagnetic reversing valve (42); the third stationary contact (d) of the three-position switch (604) is connected with the positive pole of the power supply (602) through the second electromagnetic coil (422) of the first electromagnetic reversing valve (42);
a first time relay (606), wherein a first control signal input end is connected with the pressure switch (601), and a first control signal output end is connected with a first movable contact (b) of the three-position switch (604);
wherein a first timing signal is sent to the first time relay (606) when the pressure switch (601) is closed; when the first time relay (606) counts to the first preset time, the first time relay (606) sends a switching signal to the first movable contact (b), so that the first movable contact (b) is connected with a third fixed contact (d).
8. The seat belt reliability test system of claim 7, wherein the control circuit further comprises:
a second time relay (607), wherein the second control signal input end is connected with a third fixed contact (d) of the three-position switch (604), a fourth fixed contact is connected with the negative pole of a power supply (602), a second movable contact is connected with one end of a travel switch (608), and the other end of the travel switch (608) is connected with the negative pole of the power supply (602) through a third electromagnetic coil (521) of the second electromagnetic directional valve (52);
when the first movable contact (b) is connected with the third fixed contact (d), a second timing signal is sent to the second time relay (607), after the second preset time period is reached, the second movable contact of the second time relay (607) is connected with the fourth fixed contact, a third electromagnetic coil (521) of the second electromagnetic reversing valve (52) is electrified, and after the second cylinder (51) reaches a stroke, the stroke switch (608) is disconnected and a switching signal is sent to the first movable contact (b), so that the first movable contact (b) of the three-position switch (604) is connected with the second fixed contact (c).
9. The seat belt reliability test system of claim 8, wherein the control circuit further comprises: the system comprises an acceleration sensor (609), a normally open first acceleration relay (610), a normally closed second acceleration relay (611) and an indicator light (612);
wherein the acceleration sensor (609) is mounted on a piston rod of the first cylinder (41);
the control ends of the first acceleration relay (610) and the second acceleration relay (611) are connected with the acceleration sensor (609);
the first acceleration relay (610), the indicator light (612), and the second acceleration relay (611) are connected in series between a positive pole and a negative pole of the power source (602);
when the second time relay (607) does not count time for a second preset time period and the acceleration sensor (609) detects that the acceleration of the piston rod of the first air cylinder (41) is greater than a preset value, the first acceleration relay (610) is controlled to be closed, the indicator lamp (612) is enabled to be lightened, and the second acceleration relay (611) is controlled to be opened.
10. The safety belt reliability testing system of claim 9,
the positive pole of the power supply (602) is connected with the first electromagnetic coil (421), the second electromagnetic coil (422) and the third electromagnetic coil (521) through the second acceleration relay (611) and a counting relay (613);
wherein a third movable contact of the counting relay (613) is respectively connected with the first electromagnetic coil (421), the second electromagnetic coil (422) and the third electromagnetic coil (521), a fifth stationary contact of the counting relay (613) is connected with the second acceleration relay (611), and a third control input of the counting relay (613) is connected with the counter (603);
when the counter (603) counts to a preset value, the counter (603) sends a control signal to the counting relay (613) to turn off the counting relay (613).
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| CN201911199377.3A CN110887673B (en) | 2019-11-29 | 2019-11-29 | Safety belt reliability test system |
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| CN201911199377.3A CN110887673B (en) | 2019-11-29 | 2019-11-29 | Safety belt reliability test system |
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| CN110887673B CN110887673B (en) | 2021-09-21 |
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