Static testing device for automobile safety belt

Abstract

The utility model relates to a static testing device for a safety belt, in particular to a static testing device for an automobile safety belt, which comprises a case and two mounting plates arranged on the case. A first sliding groove is formed in the mounting plate, a first clamping plate is slidably mounted on the first sliding groove, and a clamping mechanism connected with the first clamping plate is arranged on the mounting plate; a pre-tightening mechanism is further arranged on the mounting plate; a tensioning mechanism is arranged on the case, and the tensioning mechanism can drive the mounting plates to get away from each other or get close to each other so as to drive the clamping mechanisms to get away from each other or get close to each other; the machine box is further provided with a force increasing mechanism, and the force increasing mechanism can drive the first clamping plates to get close to each other or get away from each other when the tensioning mechanism acts so that the clamping force of the clamping mechanism can be increased or decreased. And through mutual cooperation of the clamping mechanism, the pre-tightening mechanism, the tensioning mechanism and the force increasing mechanism, the accuracy of a test result is improved.

Description

Technical Field

[0001] The utility model relates to a static test device for a safety belt, in particular to a static test device for a vehicle safety belt. Background Art

[0002] Car seat belts are safety devices that restrain passengers in the event of a collision and prevent passengers from having a secondary collision with the steering wheel and dashboard, or from being thrown out of the car and causing death or injury. Car seat belts are recognized as the cheapest and most effective safety device, and many countries require seat belts to be mandatory in vehicle equipment.

[0003] Therefore, the seat belt needs to be statically tested before assembly and use, in order to ensure that the seat belt can effectively protect the driver and passengers in actual use and ensure that the seat belt can play its expected role at critical moments. Common static testing methods include static tensioning device testing or static load testing.

[0004] Since most seat belts are woven, the width will shrink during the tensioning process to offset the tensioning. The common static tensioning devices on the market clamp the seat belt for tensioning during the test, and there will be a deviation between the test results of the seat belt in a relaxed state and the actual value. Utility Model Content

[0005] The utility model aims to provide a static testing device for automobile safety belts to solve the problems raised in the above-mentioned background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A static test device for a vehicle safety belt comprises a chassis and two mounting plates arranged on the chassis;

[0008] It is characterized in that a first slide groove is provided on the mounting plate, a first clamping plate is slidably mounted on the first slide groove, a clamping mechanism connected to the first clamping plate is provided on the mounting plate; a pre-tightening mechanism is also provided on the mounting plate;

[0009] The chassis is provided with a tensioning mechanism, which can drive the mounting plates to move away from or towards each other, thereby driving the clamping mechanisms to move away from or towards each other;

[0010] The chassis is also provided with a force-increasing mechanism, which can drive the first clamping plates to move closer to or farther from each other when the tensioning mechanism is in operation, so as to increase or decrease the clamping force of the clamping mechanism.

[0011] The automobile safety belt static testing device as described above: the clamping mechanism includes a second clamping plate slidably mounted on the first slide groove; a telescopic column is mounted on the second clamping plate; a telescopic sleeve connected to the first clamping plate is slidably engaged on the telescopic column; a first clamping spring connected to the telescopic column is mounted in the telescopic sleeve.

[0012] The automobile safety belt static testing device as described above: the clamping mechanism also includes a plurality of second slide grooves symmetrically arranged on the mounting plate, a connecting column is slidably engaged in the second slide groove, a third clamping plate is connected to the connecting column; a second clamping spring is installed on the connecting column.

[0013] The above-mentioned static test device for automobile safety belts: the pre-tensioning mechanism comprises a connecting plate mounted on the mounting plate; a pre-tensioning motor is mounted on the connecting plate; a turntable is connected to the output end of the pre-tensioning motor, and a pre-tensioning column is mounted on the turntable;

[0014] The mounting plate is provided with a circular guide groove which is slidably engaged with the preload column.

[0015] The above-mentioned static test device for automobile safety belts: the tensioning mechanism comprises a tensioning motor mounted on the chassis, the output end of the tensioning motor is connected to a rotating shaft, a threaded protrusion is mounted on the rotating shaft, an internal threaded sleeve is threadedly connected to the threaded protrusion; the internal threaded sleeve is connected to one of the mounting plates;

[0016] The chassis is provided with a first guide groove.

[0017] The vehicle safety belt static testing device as described above: the force-increasing mechanism includes a straight groove provided on the mounting plate, a protruding column connected to the first clamping plate being slidably engaged on the straight groove; and a clamping groove slidably engaged with the protruding column is provided on the chassis.

[0018] In the above-mentioned static testing device for automobile safety belts, anti-skid protrusions are installed on the mutually adjacent sides of the two second clamping plates, and the anti-skid protrusions can increase the friction coefficient of the second clamping plates.

[0019] Compared with the prior art, the beneficial effects of the utility model are as follows: the accuracy of the test results is improved through the mutual cooperation of the clamping mechanism, the pre-tensioning mechanism, the tensioning mechanism and the force-enhancing mechanism; the two-section clamping of the clamping mechanism prevents the safety belt from slipping when being tensioned by the tensioning mechanism, thereby increasing the accuracy of the test results; the pre-tensioning mechanism pre-tightens the safety belt clamped by the clamping mechanism, thereby tightening the safety belt between the two ends of the clamping mechanism, and making the test part of the safety belt in a straight state before tensioning, thereby avoiding the loose safety belt offsetting part of the tensioning force and reducing the accuracy of the test; since the tensioning mechanism is completed by the threaded protrusion and the threaded cooperation of the internal threaded sleeve, the position of the internal threaded sleeve will not change after the tensioning motor stops rotating, thereby enabling the tensioning mechanism to perform a constant tension test on the safety belt, thereby improving the accuracy of the test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the structure of a static test device for automobile seat belts.

[0021] Figure 2 This is a structural schematic diagram of the static test device for automobile seat belts from another perspective.

[0022] Figure 3 This is a schematic diagram of the structure of the tensioning mechanism in the static testing device for automobile seat belts.

[0023] Figure 4 This is a schematic diagram of the structure of the mounting plate in the static test device for automobile seat belts.

[0024] Figure 5 This is a schematic diagram of the structure of the clamping mechanism in the static test device for automobile seat belts.

[0025] Figure 6 This is a schematic diagram of the structure of the pretensioning mechanism in the static test device for automobile seat belts.

[0026] Figure 7 This is a schematic diagram of the structure of the third clamping plate in the static testing device for automobile safety belts.

[0027] In the figure: 1, chassis; 101, first guide groove; 102, clamping groove;

[0028] 2. Tensioning motor;

[0029] 3. Rotating shaft; 301. Threaded protrusion;

[0030] 4. Internal thread sleeve;

[0031] 5. Mounting plate; 501. First slide groove; 502. Straight groove; 503. Second slide groove; 504. Circular guide groove;

[0032] 6. First clamping plate; 601. Telescopic sleeve; 602. Protruding column;

[0033] 7. Second clamping plate; 701. Telescopic column; 702. First clamping spring

[0034] 8. Pre-tightening clamping plate; 801. Connecting column;

[0035] 9. Second clamping spring;

[0036] 10. Preload the motor;

[0037] 11. Connecting plate;

[0038] 12. Turntable; 1201. Preload column. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0040] See also Figure 1 to Figure 7 As an embodiment of the utility model, the vehicle safety belt static test device comprises a chassis 1, and two mounting plates 5 arranged on the chassis 1;

[0041] The mounting plate 5 is provided with a first slide groove 501, a first clamping plate 6 is slidably mounted on the first slide groove 501, and a clamping mechanism connected to the first clamping plate 6 is provided on the mounting plate 5; a pre-tightening mechanism is also provided on the mounting plate 5;

[0042] The chassis 1 is provided with a tensioning mechanism, which can drive the mounting plates 5 to move away from or towards each other, thereby driving the clamping mechanisms to move away from or towards each other;

[0043] The chassis 1 is also provided with a force-increasing mechanism, which can drive the first clamping plates 6 to move closer to or farther from each other when the tensioning mechanism is in operation, so as to increase or decrease the clamping force of the clamping mechanism.

[0044] In this embodiment, the static test process of the automobile seat belt is: 1. Select a section of the automobile seat belt; 2. Clamp the automobile seat belt on the tensioning test device; 3. Start the tensioning test device, apply a constant tension to the automobile seat belt and maintain it for a certain period of time; 4. Observe and record the damage status of the automobile seat belt.

[0045] When using the static test device for automobile seat belts, the automobile seat belt to be tested is clamped on the mounting plate 5 by a clamping mechanism, and then the seat belt is tightened by a pre-tensioning mechanism to put the seat belt in a taut state, so that the pressure applied to the seat belt by the tensioning mechanism during the test reaches the test standard.

[0046] After the pre-tensioning mechanism completes the pre-tensioning action, the tensioning mechanism will drive the clamping mechanism to move away from each other by driving the mounting plates 5 away from each other, so as to apply tensioning force to the seat belt, and during the tensioning process, the force-increasing mechanism will drive the first clamping plates 6 closer to each other, so that the clamping force of the clamping mechanism with the seat belt will continue to increase, so as to prevent the clamping mechanism from failing to clamp the seat belt during the continuous tensioning process, causing sliding friction between the seat belt and the clamping mechanism, thereby reducing the accuracy of the test.

[0047] The accuracy of the test results is improved by the mutual cooperation of the clamping mechanism, the pre-tightening mechanism, the tensioning mechanism and the force amplification mechanism.

[0048] As a further solution of the utility model, the clamping mechanism includes a second clamping plate 7 slidably mounted on the first slide groove 501; a telescopic column 701 is installed on the second clamping plate 7; a telescopic sleeve 601 connected to the first clamping plate 6 is slidably engaged on the telescopic column 701; a first clamping spring 702 connected to the telescopic column 701 is installed in the telescopic sleeve 601.

[0049] In this embodiment, external force is applied to the second clamping plates 7 so that the second clamping plates 7 slide away from each other in the first slide groove 501. At this time, the telescopic column 701 slides inward in the telescopic sleeve 601, and the first clamping spring 702 is compressed, thereby forming a clamping space between the two second clamping plates 7.

[0050] After the safety belt is placed in the clamping space, the external force applied to the second clamping plate 7 is released. Under the elastic force of the first clamping spring 702, the telescopic column 701 will slide outward in the telescopic sleeve 601, thereby driving the two second clamping plates 7 to approach each other in the first slide groove 501 to clamp the safety belt.

[0051] As a further solution of the utility model, the clamping mechanism also includes a plurality of groups of second sliding grooves 503 symmetrically opened on the mounting plate 5, a connecting column 801 is slidably engaged in the second sliding groove 503, a third clamping plate 8 is connected to the connecting column 801; a second clamping spring 9 is installed on the connecting column 801.

[0052] In this embodiment, after the safety belt is clamped by the second clamping plate 7, an external force is applied to the third clamping plate 8 to move the third clamping plates 8 away from each other, so that the connecting column 801 slides in the second slide groove 503 toward the second clamping spring 9, and the second clamping spring 9 is compressed. At this time, a clamping space is formed between the two third clamping plates 8. The end of the safety belt is placed in this clamping space, and the external force applied to the third clamping plate 8 is released. Under the elastic force of the second clamping spring 9, the connecting column 801 slides in the direction away from the second clamping spring 9, thereby driving the two third clamping plates 8 to approach each other to further clamp the safety belt.

[0053] Through the two-stage clamping of the clamping mechanism, the safety belt is prevented from slipping when being tensioned by the tensioning mechanism, thereby increasing the accuracy of the test result.

[0054] As a further solution of the utility model, the pre-tightening mechanism includes a connecting plate 11 mounted on the mounting plate 5; a pre-tightening motor 10 is mounted on the connecting plate 11; a turntable 12 is connected to the output end of the pre-tightening motor 10, and a pre-tightening column 1201 is mounted on the turntable 12;

[0055] The mounting plate 5 is provided with a circular guide groove 504 which is slidably engaged with the preload column 1201 .

[0056] In this embodiment, after the safety belt is clamped by the clamping mechanism, the pre-tensioning motor 10 is started to drive the turntable 12 to rotate, thereby driving the pre-tensioning column 1201 to rotate in the original circular guide groove 504. During the rotation of the pre-tensioning column 1201, the safety belt will contact and wrap the safety belt around the third clamping plate 8. As the pre-tensioning column 1201 rotates, the length of the safety belt wrapped will also increase, so that the safety belt between the clamping mechanism is continuously straightened, until the safety belt is tightly stretched and the pre-tensioning motor 10 stops rotating and maintains this position unchanged.

[0057] By pre-tightening the seat belt clamped by the clamping mechanism through the pre-tightening mechanism, the seat belt between the two ends of the clamping mechanism can be tightened, and the seat belt of the test part can be kept in a straight state before tensioning, thereby avoiding the loose seat belt offsetting part of the tensioning force and reducing the accuracy of the test.

[0058] As a further solution of the utility model, the tensioning mechanism includes a tensioning motor 2 installed on the chassis 1, the output end of the tensioning motor 2 is connected to a rotating shaft 3, a threaded protrusion 301 is installed on the rotating shaft 3, and an internal threaded sleeve 4 is threadedly connected to the threaded protrusion 301; the internal threaded sleeve 4 is connected to one of the mounting plates 5;

[0059] The chassis 1 is provided with a first guide slot 101 .

[0060] In this embodiment, another mounting plate 5 is mounted on the chassis 1, so the positions of the clamping mechanism and the pre-tightening mechanism thereon remain unchanged.

[0061] After the clamping mechanism and the pre-tensioning mechanism complete the clamping and pre-tensioning actions, the tensioning motor 2 is started, thereby driving the rotating shaft 3 to rotate, and the threaded protrusion 301 will rotate accordingly, driving the internal threaded sleeve 4 on the rotating shaft 3 to continuously move away from the tensioning motor 2 through threaded cooperation, so as to drive the mounting plate 5 connected thereto to continuously move away from the mounting plate 5 connected to the chassis 1 on the chassis 1, so that the two clamping mechanisms are continuously moved away from each other, so that the safety belt is continuously tensioned; when the tensioning force on the safety belt reaches the set value, the rotation of the tensioning motor 2 is stopped, so that the tension applied to the safety belt remains unchanged.

[0062] Since the tensioning mechanism is completed by the threaded cooperation between the threaded protrusion 301 and the internal threaded sleeve 4, the position of the internal threaded sleeve 4 will not change after the tensioning motor 2 stops rotating, so that the tensioning mechanism can perform a constant tension test on the safety belt, thereby improving the accuracy of the test results.

[0063] As a further solution of the utility model, the force-enhancing mechanism includes a straight groove 502 opened on the mounting plate 5, and a protruding column 602 connected to the first clamping plate 6 is slidably engaged on the straight groove 502; a clamping groove 102 slidably engaged with the protruding column 602 is opened on the chassis 1.

[0064] In this embodiment, the clamping groove 102 is an inclined groove on the chassis 1 that approaches the first guide groove 101. When the tensioning mechanism tensions the safety belt, the first clamping plate 6 moves along with the installation plate 5, and the protruding column 602 slides from the clamping groove 102. The inner wall of the clamping groove 102 squeezes the protruding column 602, so that the protruding column 602 also slides in the straight groove 502, so that the first clamping plate 6 continuously approaches the second clamping plate 7. During the approaching process, the telescopic column 701 slides inward in the telescopic sleeve 601, thereby compressing the first clamping spring 702, and the elastic force of the first clamping spring 702 acts on the second clamping plate 7, so that the clamping force of the second clamping plate 7 continuously increases.

[0065] When the tensioning mechanism is tensioning the seat belt, the force amplifying mechanism is used to increase the clamping force of the clamping mechanism, thereby preventing sliding friction between the seat belt and the second clamping plate 7, thereby improving the accuracy of the test result.

[0066] As a further solution of the present invention, anti-skid protrusions are installed on the surfaces of the two second clamping plates 7 that are close to each other, and the anti-skid protrusions can increase the friction coefficient of the second clamping plates 7 .

[0067] In this embodiment, the top end of the anti-skid protrusion faces the direction of the third clamping plate 8 matched therewith, so when the safety belt is tensioned by the tensioning mechanism, the anti-skid protrusion can further prevent slipping, thereby improving the accuracy of the test result.

[0068] The above embodiments are exemplary rather than restrictive, so without departing from the spirit or basic features of the present invention, the technical solutions of the present invention that can be implemented in other specific forms are all included in the present invention.

Claims

1. A static test device for a vehicle safety belt, comprising a chassis (1), and two mounting plates (5) arranged on the chassis (1); It is characterized in that The mounting plate (5) is provided with a first sliding groove (501), a first clamping plate (6) is slidably mounted on the first sliding groove (501), and a clamping mechanism connected to the first clamping plate (6) is provided on the mounting plate (5); the mounting plate (5) is also provided with a pre-tightening mechanism; The chassis (1) is provided with a tensioning mechanism, and the tensioning mechanism can drive the mounting plates (5) to move away from or towards each other, thereby driving the clamping mechanisms to move away from or towards each other; The chassis (1) is also provided with a force-increasing mechanism, which can drive the first clamping plates (6) to move closer to or farther from each other when the tensioning mechanism is in operation, so as to increase or decrease the clamping force of the clamping mechanism.

2. A static testing device for automobile safety belts according to claim 1, characterized in that: The clamping mechanism comprises a second clamping plate (7) slidably mounted on the first sliding groove (501); a telescopic column (701) is mounted on the second clamping plate (7); a telescopic sleeve (601) connected to the first clamping plate (6) is slidably engaged on the telescopic column (701); a first clamping spring (702) connected to the telescopic column (701) is mounted in the telescopic sleeve (601).

3. A static testing device for automobile safety belts according to claim 2, characterized in that: The clamping mechanism also includes a plurality of groups of second sliding grooves (503) symmetrically arranged on the mounting plate (5), a connecting column (801) slidably engaged in the second sliding groove (503), a third clamping plate (8) being connected to the connecting column (801); and a second clamping spring (9) being installed on the connecting column (801).

4. A static testing device for automobile safety belts according to claim 3, characterized in that: The pre-tightening mechanism comprises a connecting plate (11) mounted on the mounting plate (5); a pre-tightening motor (10) is mounted on the connecting plate (11); a rotating disk (12) is connected to the output end of the pre-tightening motor (10), and a pre-tightening column (1201) is mounted on the rotating disk (12); The mounting plate (5) is provided with a circular guide groove (504) which is slidably engaged with the pre-tightening column (1201).

5. A static testing device for automobile safety belts according to claim 4, characterized in that: The tensioning mechanism comprises a tensioning motor (2) mounted on the chassis (1); the output end of the tensioning motor (2) is connected to a rotating shaft (3); a threaded protrusion (301) is mounted on the rotating shaft (3); an internal threaded sleeve (4) is threadedly connected to the threaded protrusion (301); the internal threaded sleeve (4) is connected to a mounting plate (5); The chassis (1) is provided with a first guide groove (101).

6. A static testing device for automobile safety belts according to claim 4, characterized in that: The force-increasing mechanism comprises a straight groove (502) formed on the mounting plate (5), a protruding column (602) connected to the first clamping plate (6) being slidably engaged on the straight groove (502); and a clamping groove (102) slidably engaged with the protruding column (602) is formed on the chassis (1).

7. The static testing device for automobile safety belts according to claim 2, characterized in that: Anti-skid protrusions are installed on the mutually adjacent sides of the two second clamping plates (7), and the anti-skid protrusions can increase the friction coefficient of the second clamping plates (7).

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