System suitable for advanced leg shape dynamic calibration

Abstract

The utility model relates to the technical field of automobile pedestrian protection tests, and discloses a system suitable for advanced leg type dynamic calibration, which comprises a testboard for dynamic calibration, an adjusting mechanism and two sliding mechanisms are arranged at the upper end of the testboard, each sliding mechanism comprises a sliding frame and a sliding block, the sliding frame is fixedly mounted at the upper end of the testboard, and the sliding block is fixedly mounted at the lower end of the testboard. The sliding blocks are arranged on the outer walls of the sliding frames in a sliding mode, first connecting blocks are arranged at the ends, away from the sliding frames, of the sliding blocks, the outer walls of the first connecting blocks are jointly connected with a testing leg mechanism, the adjusting mechanism comprises a support and a lead screw pair, the support is fixedly installed on the outer side of one sliding frame, and the lead screw pair is vertically arranged on the outer side of the support. The lead screw pair comprises a lead screw and a nut sleeve, a second connecting block is arranged on the outer side of the nut sleeve, the second connecting block is fixedly connected with the first connecting block, and the problem that an advanced leg type is not suitable for an existing dynamic calibration system is solved through mutual cooperation of the sliding mechanism and the adjusting mechanism.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile pedestrian protection test, in particular to a system suitable for advanced leg shape dynamic calibration. Background Art

[0002] In the pedestrian protection test, a flexible leg type is needed to perform impact and pendulum tests on a calibration test bench. With the update of test procedures such as Euro NCAP, CNCAP, and C-IASI, advanced leg types have begun to gradually replace the original flexible leg types in pedestrian protection tests. When the advanced leg type is subjected to impact tests, it is necessary to perform impacts at two different heights of the advanced leg type, and dynamic calibration needs to be performed again after 20 impact tests. Compared with the flexible leg type, the weight, length, and impact test position of the advanced leg type have changed, making the existing dynamic calibration system unsuitable for the dynamic calibration of the advanced leg type. How to carry out dynamic calibration of the advanced leg type has become the primary problem to be solved. To this end, we proposed a system suitable for dynamic calibration of advanced leg types to solve the above problems. Utility Model Content

[0003] The utility model aims to provide a system suitable for dynamic calibration of advanced leg shapes, so as to solve the problem that the existing dynamic calibration system is not suitable for dynamic calibration of advanced leg shapes.

[0004] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a system suitable for dynamic calibration of advanced leg types, including a test bench for dynamic calibration, an adjustment mechanism and two sliding mechanisms are provided at the upper end of the test bench, each sliding mechanism includes a sliding frame and a slider, the sliding frame is fixedly installed on the upper end of the test bench, the slider is slidably arranged on the outer wall of the sliding frame, a first connecting block is provided at the end of the slider away from the sliding frame, a mounting block is provided at the end of the first connecting block close to the test bench, a rotating rod is rotatably provided between the two mounting blocks, a test leg mechanism is provided on the outer wall of the rotating rod, the adjustment mechanism includes a bracket and a screw pair, the bracket is fixedly installed on the outside of one of the sliding frames, the screw pair is vertically arranged on the outside of the bracket, the screw pair includes a screw and a nut sleeve, a second connecting block is provided on the outside of the nut sleeve, and the second connecting block is fixedly connected to the first connecting block.

[0005] The beneficial effects of this program are:

[0006] 1. This solution rotates the screw pair to make the second connecting block move up and down on its outside. The moving second connecting block drives the first connecting block fixedly connected to it to move, and the two first connecting blocks become a whole through the cooperation of the mounting block and the rotating rod, so that each first connecting block moves along the sliding frame under the action of each slider, and then smoothly moves the test leg mechanism up or down, finally realizing the dynamic calibration of the advanced leg type at different heights, and solving the problem that the heights of the two impact tests of the advanced leg type are different and not suitable for the existing dynamic calibration system.

[0007] 2. By rotating the rotating rod, the test leg mechanism fixedly connected thereto can be kept vertical to the ground under the action of its own gravity, which is more conducive to dynamic calibration.

[0008] Preferably, as an improvement, the test leg mechanism includes a hook and a leg shape to be tested, one end of the hook is fixedly connected to the outer wall of the rotating rod, and the other end is connected to the leg shape to be tested.

[0009] The beneficial effect is that when the leg type to be tested is hit, it is separated from the hook under the action of external force, preventing the external force from being transmitted to the rotating rod through the hook, thereby protecting the rotating rod.

[0010] Preferably, as an improvement, the sliding frame includes a slide rail and a mounting frame, the mounting frame is fixedly mounted on the upper end of the test bench, the slide rail is fixedly mounted on the outer side of the mounting frame, and the slider is slidably arranged on the outer wall of the slide rail.

[0011] The beneficial effect is that the mounting frame provides support for the slide rail, thereby increasing the stability of the slide block moving on the outer side of the slide rail.

[0012] Preferably, as an improvement, the inner wall of the mounting block is provided with a plurality of reinforcing ribs, and the outer wall of the first connecting block is provided with through grooves corresponding to the respective reinforcing ribs.

[0013] The beneficial effects are as follows: the reinforcing ribs can improve the strength and bearing capacity of the mounting block, and the through grooves provided on the outer wall of the first connecting block facilitate the fixation between the first connecting block and the mounting block.

[0014] Preferably, as an improvement, the bracket is configured as an M-shaped bracket.

[0015] The beneficial effects are: the M-shaped bracket has a stable structure and can make the screw pair run more stably.

[0016] Preferably, as an improvement, a mounting base is provided between the test bench and the mounting frame, the mounting base is fixedly mounted on the upper end of the test bench, and each mounting frame is fixedly mounted on the upper end of the mounting base.

[0017] The beneficial effect is that the mounting base can prevent the mounting block from directly colliding with the test bench when moving, thereby protecting the test bench.

[0018] Preferably, as an improvement, a T-block is symmetrically provided at one end of the bracket close to the first connecting block, and the screw rod is rotatably installed between the two T-blocks.

[0019] The beneficial effect is that the screw rod pair is installed through two T-blocks, which makes it convenient for subsequent staff to replace the screw rod pair.

[0020] Preferably, as an improvement, a swivel is provided at one end of the screw rod, and a handle is hinged on the outer side of the swivel.

[0021] The beneficial effects are: the swivel ring makes it easy for the staff to rotate the screw pair, and the handle makes it easier for the staff to rotate the screw pair. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of an embodiment of the utility model;

[0023] Figure 2 It is a schematic diagram of the structure of the sliding frame in the embodiment of the utility model. DETAILED DESCRIPTION

[0024] The following is further described in detail through specific implementation methods:

[0025] The figure marks in the drawings of the specification include: sliding frame 1, slider 2, first connecting block 3, mounting block 4, rotating rod 5, bracket 6, screw pair 7, second connecting block 8, hook 9, leg type to be tested 10, slide rail 11, mounting frame 12, reinforcing rib 13, through groove 14, mounting base 15, T-block 16, swivel 17, handle 18.

[0026] Example

[0027] The embodiment is basically as shown in the attached Figure 1-2 As shown, Figure 1 The system shown in the figure is suitable for dynamic calibration of advanced leg shape, including a test bench for dynamic calibration, a mounting base 15 is fixedly installed on the upper end of the test bench by bolts, an adjustment mechanism and two sliding mechanisms are arranged on the upper end of the mounting base 15, and the two sliding mechanisms are symmetrically arranged on the rear side of the upper end of the mounting base 15, and each sliding mechanism includes a sliding frame 1 and a sliding block 2, as shown in FIG. Figure 2As shown, each sliding frame 1 includes a slide rail 11 and a mounting frame 12, the mounting frame 12 is fixedly installed on the upper end of the mounting base 15 by bolts, the slide rail 11 is fixedly installed on the front end of the mounting frame 12 by bolts, the slider 2 is slidably installed on the outer side of the corresponding slide rail 11, the front end of the slide rail 11 is fixedly installed with a first connecting block 3, the outer wall of the first connecting block 3 is provided with a plurality of through grooves 14, the lower end of the first connecting block 3 is fixedly fixed with a mounting block 4 by bolts, the inner wall of the mounting block 4 is fixed with a plurality of reinforcing ribs 13 by welding, and each reinforcing rib 13 is located in the through groove 14 of the corresponding first connecting block 3, the opposite ends of the two mounting blocks 4 are rotatably installed with a rotating rod 5, the outer wall of the rotating rod 5 is connected with a test leg mechanism, the test leg mechanism includes a hook 9 and a leg type 10 to be tested, the upper end of the hook 9 is fixedly connected to the middle part of the rotating rod 5 by bolts, and the lower end of the hook 9 is connected to the leg type 10 to be tested, and the specific reference is made to the connection method between 4.10 and 14.1 in a leg type dynamic calibration device with patent publication number CN114964814B;

[0028] The adjusting mechanism includes a bracket 6 and a screw pair 7. The bracket 6 is set as an M-shaped bracket 6 and is fixedly installed on the right end of the mounting frame 12 located on the right side by bolts. A T-block 16 is symmetrically fixedly installed at the front end of the bracket 6 by bolts, and the two T-blocks 16 are symmetrical up and down. The screw pair 7 includes a screw and a nut sleeve. The screw is rotatably installed between the two T-blocks 16 in a vertical state. The nut sleeve is threadedly connected to the outer wall of the screw and is located between the two T-blocks 16. The outer wall of the nut sleeve is fixedly connected to a second connecting block 8. The left end of the second connecting block 8 is fixedly connected to the right end of the first connecting block 3 located on the right side by bolts. A swivel 17 is fixedly connected to the lower end of the screw. A handle 18 is hinged on the outside of the swivel 17, and the handle 18 can be rotated to a vertical state through a hinge point.

[0029] The specific implementation process is as follows:

[0030] Since the advanced leg type is longer and the heights of the two impact tests are different, when the advanced leg type is impact tested, the staff first fixes the upper end of the hook 9 to the outer wall of the rotating rod 5 with bolts, and then buckles the leg type 10 to be tested with the lower end of the hook 9. The leg type 10 to be tested is in a vertical state and remains perpendicular to the ground under the action of gravity. At this time, the staff can rotate the swivel 17 by holding the handle 18 in the vertical state, thereby driving the screw rod fixedly installed at the front end of the bracket 6 to rotate and drive the nut sleeve threaded on its outer side to move between the two T-blocks 16, thereby making the second connecting block 8 fixedly connected to the outer wall of the nut sleeve drive the first connecting block 3 on the right side to move. Since the lower ends of the two first connecting blocks 3 are fixedly installed with mounting blocks 4, and the rotating rod 5 is rotatably installed between the two mounting blocks 4, when the first connecting block 3 on the right side moves When the second connecting block 8 moves, the two first connecting blocks 3 move along the slide rail 11 at the front end of the mounting frame 12 under the action of each slider 2. At this time, the rotating rod 5 rotatably connected between the two mounting blocks 4 will also drive the test leg mechanism fixedly connected thereto to move synchronously. When the test leg mechanism moves to the appropriate position, the staff fixes each slider 2 at the front end of the corresponding slide rail 11 with bolts, and places pads of corresponding height in the gap between each mounting block 4 and the mounting base 15 to further increase the stability of the sliding mechanism. Since the advanced leg shape is longer, a gasket of appropriate height can be fixed at the lower end of the test bench. Finally, the test bench is used to perform dynamic calibration of the leg shape 10 to be tested twice at different heights, thereby realizing dynamic calibration of the advanced leg shape on the existing dynamic calibration system, which greatly improves the applicability of the existing dynamic calibration system.

[0031] 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, without departing from the technical solution of the utility model, several deformations and improvements can be made, which should also be regarded as the protection scope of the utility model, and these will not affect the effect of the implementation of the utility model 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 system suitable for dynamic calibration of advanced leg forms, comprising a test bench for dynamic calibration, characterized in that: An adjustment mechanism and two sliding mechanisms are provided at the upper end of the test bench, each sliding mechanism includes a sliding frame and a slider, the sliding frame is fixedly installed on the upper end of the test bench, the slider is slidably arranged on the outer wall of the sliding frame, a first connecting block is provided at the end of the slider away from the sliding frame, a mounting block is provided at the end of the first connecting block close to the test bench, a rotating rod is rotatably provided between the two mounting blocks, a test leg mechanism is provided on the outer wall of the rotating rod, the adjustment mechanism includes a bracket and a screw pair, the bracket is fixedly installed on the outside of one of the sliding frames, the screw pair is vertically arranged on the outside of the bracket, the screw pair includes a screw and a nut sleeve, a second connecting block is provided on the outside of the nut sleeve, and the second connecting block is fixedly connected to the first connecting block.

2. A system suitable for advanced leg shape dynamic calibration according to claim 1, characterized in that: The testing leg mechanism comprises a hook and a leg shape to be tested, one end of the hook is fixedly connected to the outer wall of the rotating rod, and the other end is connected to the leg shape to be tested.

3. A system suitable for advanced leg shape dynamic calibration according to claim 1, characterized in that: The sliding frame comprises a sliding rail and a mounting frame, the mounting frame is fixedly mounted on the upper end of the test bench, the sliding rail is fixedly mounted on the outer side of the mounting frame, and the sliding block is slidably arranged on the outer wall of the sliding rail.

4. A system suitable for advanced leg shape dynamic calibration according to claim 1, characterized in that: The inner wall of the installation block is provided with a plurality of reinforcing ribs, and the outer wall of the first connection block is provided with through grooves corresponding to the respective reinforcing ribs.

5. The system for advanced leg shape dynamic calibration according to claim 1, characterized in that: The bracket is set as an M-type bracket.

6. A system suitable for advanced leg shape dynamic calibration according to claim 3, characterized in that: A mounting base is provided between the test bench and the mounting frame. The mounting base is fixedly mounted on the upper end of the test bench, and each mounting frame is fixedly mounted on the upper end of the mounting base.

7. The system for advanced leg shape dynamic calibration according to claim 5, characterized in that: One end of the bracket close to the first connecting block is symmetrically provided with T-blocks, and the screw rod is rotatably installed between the two T-blocks.

8. The system for advanced leg shape dynamic calibration according to claim 1, characterized in that: A swivel is provided at one end of the screw rod, and a handle is hinged on the outer side of the swivel.

Images