Head type test stay wire device

Abstract

The utility model relates to the technical field of head test, and discloses a head test wire drawing device, which is connected with a test bench for head test and comprises a support assembly and a bottom plate assembly which are mounted from top to bottom, the bottom plate assembly comprises a bottom plate, the support assembly comprises a main support, an inclined strut support and a cantilever support, the main support comprises a vertical rod and a transverse rod, and the vertical rod and the transverse rod are connected with each other. The vertical rod is fixedly connected with the cross rod, the cross rod is fixedly installed on the bottom plate, one end of the inclined strut support is fixedly installed at the upper end of the vertical rod of the main support, the cantilever support is fixedly connected with the other end of the inclined strut support, the support assembly further comprises a rear inclined support, the rear inclined support is fixedly installed on the rear side of the vertical rod of the main support in an inclined strut mode, and the stay wire mechanism comprises a stay wire. The device further comprises a cylinder assembly, the cylinder assembly comprises a cylinder, the cylinder is fixedly installed on the rear inclined support, one end of the stay wire is connected with the cylinder, the other end of the stay wire is erected at one end, away from the main support, of the cantilever support, and the cylinder assembly is connected with the test bench. The problem that an automobile windshield is possibly broken by the head shape can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of head shape related testing, in particular to a head shape testing wire pulling device. Background Art

[0002] Since the most vulnerable parts of pedestrians in traffic accidents are the head and legs, a pedestrian protection test is set up in the NCAP related tests, which is specifically reflected in the head test and the leg test. The so-called head test is that the tester takes a spherical instrument that imitates the human head shape and hits different positions of the front hood of the car at different impact speed zones, and then evaluates it based on the data collected by the acceleration sensor in the head shape. During the test, the tester launches the head shape through the test bench preset head shape launch time. At present, for ECER127, C-IASI, and various NCAP head shape related test standards, the impact angle of the head shape relative to the ground reference plane is 50°±2°, 20°±2, 65°±2° and 60°±2. At these impact angles, the head shape flies freely in the air for a distance and impacts the target position. After the impact, the head shape will bounce towards the target position, and there is a risk of hitting the front windshield of the car and falling and breaking the head shape sensor line. The existing device requires a person to pull the rope behind the car to pull out the head shape after the impact to ensure that the head shape will not have the above risks.

[0003] The drawbacks of this technology are that it requires relatively good coordination between humans and the test equipment to avoid the risk of hitting the windshield and breaking the sensor, and there is a risk of being hit on the head when the person is pulling the wire. Utility Model Content

[0004] The utility model aims to provide a head form test wire pulling device to solve the risk that the head form may hit the windshield or break the sensor due to improper coordination between the person and the test equipment.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A head form test wire pulling device is connected to a test bench for head form testing, and includes a bracket assembly and a base plate assembly installed from top to bottom, the base plate assembly includes a base plate, the bracket assembly includes a main bracket, a diagonal brace bracket, and a cantilever bracket, the main bracket includes a vertical rod and a horizontal rod, the vertical rod is fixedly connected to the horizontal rod, the horizontal rod is fixedly installed on the base plate, one end of the diagonal brace bracket is fixedly installed on the upper end of the vertical rod of the main bracket, and the cantilever bracket is fixedly connected to the other end of the diagonal brace bracket, the bracket assembly also includes a rear diagonal bracket, the rear diagonal bracket diagonal brace is fixedly installed on the rear side of the vertical rod of the main bracket, and also includes a wire pulling mechanism, the wire pulling mechanism includes a wire, and also includes a cylinder assembly, the cylinder assembly includes a cylinder, the cylinder is fixedly installed on the rear diagonal bracket, one end of the wire is connected to the cylinder, and the other end is draped on the end of the cantilever bracket away from the main bracket, and the cylinder is connected to the test bench.

[0007] The principle of this scheme is:

[0008] The cylinder of the utility model is connected to a test bench, and the test bench sets the time for the head form to be launched as T0. The test bench sets a suitable retraction time for the cylinder, such as setting the cylinder to start to retract 0.2 seconds after T0. When the head form is launched 0.2 seconds later, the cylinder starts to retract, and then drives the pull wire to pull the head form. In actual application, the suitable retraction time of the cylinder is preset on the test bench, and the head form is connected with the pull wire. When the head form impacts the test point at a certain angle, the cylinder retracts after the cylinder retraction time is reached, and the pull wire is recovered, and the head form is pulled upward to prevent the head form from hitting the front windshield of the vehicle or falling off and breaking the head form sensor connection line.

[0009] The advantages of this solution are:

[0010] 1. In the head shape test, the head shape will not stop moving immediately after hitting the target point, but will continue to fly in the direction of the car windshield. At present, in order to solve this problem, the tester needs to manually pull the rope connected to the head shape to prevent the head shape from continuing to fly. The human body itself needs reaction time. When the head shape hits the target point, the human body may not be able to react in time to pull back the rope. Delayed pulling back the head shape may cause the head shape to break the windshield or fall off and break the sensor connection. The utility model proposes an improvement plan for this problem, connecting the head shape with the device, and the device is connected to the test bench at the same time. By setting a suitable cylinder contraction time, the cylinder automatically contracts and retracts the head shape after the time is reached. There is no need for the tester to manually pull the rope to retract the head shape, thereby avoiding the problem of the head shape hitting the windshield or falling off and breaking the sensor connection due to the human body's slow reaction.

[0011] 2. The utility model does not require the tester to pull the rope behind the vehicle. The tester only needs to preset the head shape launch time and the cylinder retraction time on the test bench, and the device can operate automatically, avoiding the risk of the tester being hit by the head shape behind the vehicle.

[0012] 3. This device pulls the wire through the cylinder, which is more convenient than electric control or hydraulic control, and is easy to manufacture and install, reducing manufacturing costs.

[0013] Preferably, as an improvement, the wire pulling mechanism further comprises two pulley mechanisms, which are respectively installed at the connection between the vertical rod of the main support and the diagonal support and at the head of the cantilever support away from the main support. Installing the pulley mechanism can make the wire pulling smoother, and if the pulley mechanism adopts a movable pulley form, it can save the pulling force of the cylinder assembly.

[0014] Preferably, as an improvement, the base plate assembly further includes a caster mounting plate, a pad block, and casters. There are two caster mounting plates, which are symmetrically mounted on the rear side of the base plate and fixedly connected to the upper end surface of the base plate through the pad block. There are four casters, two of which are fixedly mounted on the lower end surface of the caster mounting plate, and the other two are fixedly mounted on the lower end surface of the front side of the base plate. The diameter of the caster mounted on the caster mounting plate is larger than the caster mounted on the front side of the base plate. By installing casters on the device, the entire device is more convenient to move, which is convenient for testers to change test positions and save test time. In addition, the diameter of the caster mounted on the caster mounting plate is larger than the caster mounted on the front side of the base plate, which makes the load-bearing capacity of the rear side of the base plate stronger and prevents the entire device from tipping over when the pull wire pulls the head shape.

[0015] Preferably, as an improvement, the wire pulling mechanism further comprises a lifting ring limiting device, which is fixedly mounted on the head of the cantilever bracket away from the main bracket, and the wire passes through the lifting ring limiting device. The lifting ring limiting device can provide a limiting effect for the wire pulling head shape to prevent the wire from being pulled excessively.

[0016] Preferably, as an improvement, the main support has two crossbars in a T-shaped structure, and the vertical rod is fixedly connected to the junction of the two crossbars. The crossbar of the T-shaped structure can be more firmly fixed on the bottom plate, providing good support for the entire device.

[0017] Preferably, as an improvement, the bracket assembly further includes two side inclined brackets, which are fixedly supported and installed on both sides of the vertical rod of the main bracket. The additional side inclined brackets located on both sides of the vertical rod of the main bracket can provide better support for the bracket assembly, and the two side inclined brackets and the cross bar of the main bracket form an isosceles triangle structure, which makes the structure stable and not easy to deform.

[0018] Preferably, as an improvement, the cantilever bracket and the diagonal brace bracket installation point, the rear diagonal bracket and the main bracket vertical rod installation point, and the side diagonal bracket and the main bracket vertical rod installation point are all fixedly installed with a fixing plate. Installing the fixing plate can further stabilize the connection between the parts. The cantilever bracket and the diagonal brace bracket installation point are subjected to upward or downward deformation force when the pull wire is pulled. The cantilever bracket is prone to deformation relative to the diagonal brace bracket. The fixing plate fixedly installed on the cantilever bracket and the diagonal brace bracket can provide a reaction force for the deformation force, so that the structure is stable. The rear diagonal bracket is installed relative to the vertical rod of the main bracket, and the side diagonal bracket is installed relative to the vertical rod of the main bracket. They are prone to slide downward due to their own gravity. The fixing plate can prevent the sliding trend and keep the structure stable.

[0019] Preferably, as an improvement, the two casters respectively fixedly mounted on the caster mounting plate are further provided with a stop portion. By providing the stop portion, the casters of the device are prevented from sliding when it is not necessary to move, so as to avoid displacement during the test, which may affect the test effect or the safety of the tester. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of an embodiment of the utility model;

[0021] Figure 2 It is a left view of an embodiment of the utility model. DETAILED DESCRIPTION

[0022] The following is further described in detail through specific implementation methods:

[0023] The figure marks in the drawings of the specification include: base plate 1-1, caster 1-2, caster mounting plate 1-3, stop part 1-4, raising block 1-5, main bracket 5, vertical rod 5-1, cross bar I5-2, cross bar II5-3, diagonal support bracket 6, cantilever bracket 7, pulley mechanism I8, pulley mechanism II9, pull wire 10, cylinder 11, air storage tank 12, lifting ring limit device 13, side inclined bracket 14, rear inclined bracket 15, 30 degree fixing plate 16, 70 degree fixing plate 17, fixing plate I18.

[0024] The embodiment is basically as shown in the attached Figure 1 , 2 As shown:

[0025] A head type test wire pulling device comprises a bracket assembly and a base plate assembly installed from top to bottom, the base plate assembly comprises a base plate 1-1, the bracket assembly comprises a main bracket 5, a diagonal support bracket 6, and a cantilever bracket 7, the main bracket 5 comprises a vertical rod 5-1 and a horizontal rod, the main bracket 5 has two horizontal rods, namely a horizontal rod I5-2 and a horizontal rod II5-3, the two horizontal rods are in a T-shaped structure, the vertical rod 5-1 is fixedly connected to the junction of the two horizontal rods I5-2 and II5-3, the horizontal rod I5-2 and the horizontal rod II5-3 are fixedly installed on the base plate 1-1, one end of the diagonal support bracket 6 is fixedly installed on the upper end of the vertical rod 5-1 of the main bracket 5, and the cantilever bracket 7 is fixedly connected to the other end of the diagonal support bracket 6.

[0026] The bracket assembly also includes a side oblique bracket 14, which is two and fixedly supported and installed on both sides of the vertical rod 5-1 of the main bracket 5. The bracket assembly also includes a rear oblique bracket 15, which is diagonally fixed and installed on the rear side of the vertical rod 5-1 of the main bracket 5. A 70-degree fixing plate 17 is fixed at the installation position of the rear oblique bracket 15 and the vertical rod 5-1 of the main bracket 5. The installation angle between the rear oblique bracket 15 and the main bracket 5 is 70 degrees, and the angle of the 70-degree fixing plate matches the installation angle. A 30-degree fixing plate 16 is fixed at the installation position of the side oblique bracket 14 and the vertical rod 5-1 of the main bracket 5. The installation angle between the side oblique bracket 14 and the vertical rod 5-1 of the main bracket 5 is 30 degrees, and the angle of the 30-degree fixing plate matches the installation angle. The cantilever bracket 7 and the diagonal support bracket 6 are installed with a fixing plate 118, and there is no specific angle selection for the fixing plate.

[0027] It also includes a pulling wire mechanism, which includes a pulling wire 10. The pulling wire mechanism also includes two pulley mechanisms, which are respectively installed at the connection between the vertical rod 5-1 of the main bracket 5 and the diagonal support bracket 6 and the head of the cantilever bracket 7 away from the main bracket 5. The pulley mechanism I8 is installed at the connection between the vertical rod 5-1 of the main bracket 5 and the diagonal support bracket 6, and the pulley mechanism II9 is ​​installed at the head of the cantilever bracket 7 away from the main bracket 5. The pulling wire 10 passes around the pulley mechanism I8 and the pulley mechanism II9 in turn.

[0028] It also includes a cylinder assembly, which includes a cylinder 11 and a gas tank 12. The cylinder 11 is fixedly mounted on the rear oblique bracket 15. The cylinder 11 is also fixedly mounted on the bottom plate. The gas tank 12 is mounted on the upper end surface of the bottom plate 1-1. The cylinder 11 is connected to the gas tank 12. The gas tank 12 provides an air source for the cylinder 11. One end of the pull wire 10 is connected to the external joint of the cylinder 11, and the other end is set on the end of the cantilever bracket 7 away from the main bracket 5. The cylinder 11 is connected to the test bench. The test bench sets the head form launch as T0 time. The test bench can also set the contraction time of the cylinder 11, such as setting the cylinder to start contracting 0.2 seconds after T0 time. When the head form is launched 0.2 seconds later, the cylinder starts to contract, and then drives the pull wire to pull the head form.

[0029] The base plate assembly also includes a caster mounting plate 1-3, a spacer block 1-5, and a caster 1-2. There are two caster mounting plates 1-3, which are symmetrically mounted on the rear side of the base plate 1-1 and fixedly connected to the upper end surface of the base plate 1-1 through the spacer block 1-5. There are four casters 1-2, two of which are fixedly mounted on the lower end surface of the caster mounting plate 1-3, and the other two are fixedly mounted on the lower end surface of the front side of the base plate 1-1. The two casters 1-2 respectively fixedly mounted on the caster mounting plate 1-3 are also provided with a stopper 1-4, which is an arc-shaped piece with a buckle, which is rotatably mounted on the upper end of the caster 1-2 through a connecting shaft. When it is necessary to limit the rotation of the caster 1-2, the stopper 1-4 is rotated downward so that the buckle blocks the caster 1-2 and limits its rotational freedom.

[0030] The wire pulling mechanism further comprises a lifting ring limiting device 13 , which is fixedly mounted on the head of one end of the cantilever bracket 7 away from the main bracket 5 , and the pulling wire 10 passes through the lifting ring limiting device 13 .

[0031] In actual use, the headform is first connected with the cable 10. The tester sets the appropriate cylinder 11 contraction time through the test bench to control the lifting time of the headform. Considering the length of the cable 10, the test bench usually sets the time for launching the headform to -0.4 seconds (that is, the cylinder 11 contracts before the headform is launched). When the headform launch timing T0 set by the test bench is met, the headform impacts the test point at a certain angle. 0.4 seconds before this, the cylinder 11 contracts, driving the cable 10 to contract. Since the cable 10 has a certain length, the headform reaches the target impact point and the impact occurs about 0.5 seconds later, the cable 10 lifts the headform. When the cable 10 is pulled to the lifting ring limit device 13, the cylinder 11 stops contracting and the cable 10 stops lifting. When the headform needs to be removed, the switch can be turned on to control the cylinder 11 to start extending, and the cable 10 is lowered to remove the headform.

[0032] The above is only an embodiment of the utility model, and the common knowledge such as the known specific technical solutions and / or characteristics in the solution is not described in detail here. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the technical solution of the present invention, 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 practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A head form test wire pulling device, connected to a head form test bench, characterized in that: It includes a bracket assembly and a base plate assembly installed from top to bottom, the base plate assembly includes a base plate, the bracket assembly includes a main bracket, a diagonal brace bracket, and a cantilever bracket, the main bracket includes a vertical rod and a horizontal rod, the vertical rod is fixedly connected to the horizontal rod, the horizontal rod is fixedly installed on the base plate, one end of the diagonal brace bracket is fixedly installed on the upper end of the vertical rod of the main bracket, the cantilever bracket is fixedly connected to the other end of the diagonal brace bracket, the bracket assembly also includes a rear diagonal bracket, the rear diagonal bracket diagonal brace is fixedly installed on the rear side of the vertical rod of the main bracket, and also includes a wire pulling mechanism, the wire pulling mechanism includes a wire pulling, and also includes a cylinder assembly, the cylinder assembly includes a cylinder, the cylinder is fixedly installed on the rear diagonal bracket, one end of the wire pulling is connected to the cylinder, and the other end is traversed on the end of the cantilever bracket away from the main bracket, and the cylinder is connected to the test bench.

2. The head shape test wire pulling device according to claim 1, characterized in that: The wire pulling mechanism also includes two pulley mechanisms, which are respectively installed at the connection between the vertical rod of the main support and the diagonal support and the head of the cantilever support away from one end of the main support.

3. The head shape test wire pulling device according to claim 2, characterized in that: The base plate assembly also includes a caster mounting plate, a pad block, and casters. There are two caster mounting plates, which are symmetrically installed on the rear side of the base plate and fixedly connected to the upper end surface of the base plate through the pad block. There are four casters, two of which are fixedly installed on the lower end surface of the caster mounting plate, and the other two are fixedly installed on the lower end surface of the front side of the base plate. The diameter of the caster installed on the caster mounting plate is larger than that of the caster installed on the front side of the base plate.

4. The head shape test wire drawing device according to claim 3, characterized in that: The wire pulling mechanism also includes a lifting ring limiting device, which is fixedly mounted on the head of one end of the cantilever bracket away from the main bracket, and the pulling wire passes through the lifting ring limiting device.

5. The head shape test wire pulling device according to claim 4, characterized in that: The main support has two cross bars in a T-shaped structure, and the vertical bar is fixedly connected to the junction of the two cross bars.

6. The head shape test wire pulling device according to claim 5, characterized in that: The bracket assembly also includes two side inclined brackets, which are fixedly supported and installed on both sides of the vertical rod of the main bracket.

7. The head shape test wire drawing device according to claim 6, characterized in that: The cantilever bracket and the diagonal support bracket installation position, the rear diagonal bracket and the vertical rod installation position of the main bracket, and the side diagonal bracket and the vertical rod installation position of the main bracket are all fixedly installed with fixing plates.

8. The head shape test wire drawing device according to claim 7, characterized in that: The two casters respectively fixedly mounted on the caster mounting plates are also provided with a stopper.

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