Air bag damper size universal device adaptive to fatigue testing machine

Abstract

The utility model discloses an air bag damper size universal device adaptive to a fatigue testing machine, which comprises an upper cover plate and a lower cover plate, the upper cover plate and the lower cover plate are spaced, an upper thread table is connected to one surface of the upper cover plate, which is arranged outwards, through a bolt, and a lower thread table is connected to one surface of the lower cover plate, which is arranged outwards, through a bolt. The upper cover plate and the lower cover plate are respectively provided with reserved mounting holes with different sizes, a system centering hole, an optical axis centering hole, a side plate centering hole and a centering scale line, the middle of a diagonal line of the upper cover plate and two sides of a centering line are provided with a plurality of reserved mounting holes with different sizes, and the middle of a diagonal line of the lower cover plate and two sides of the centering line are provided with a plurality of reserved mounting holes with different sizes. A plurality of system centering holes are formed in the centering line of the upper cover plate and the lower cover plate, and an air bag vibration reduction test piece is arranged at the interval of the upper cover plate and the lower cover plate. The device can ensure the coaxiality of the hydraulic chuck of the fatigue testing machine, and solves the problem that air bag vibration reduction test pieces of the same type and different sizes cannot be universally used.

Description

Technical Field

[0001] The utility model relates to the field of air bag vibration reduction, in particular to a universal device for air bag shock absorber size adapted to a fatigue testing machine. Background Art

[0002] In the existing technology, vibration reduction technology is becoming more and more mature. Before any new product is fully promoted, its safety, public acceptance and social impact must be investigated, tested and planned in advance. Similarly, airbag shock absorbers also have higher requirements for safety and stiffness performance. Assuming that the airbag shock absorber can achieve safety goals based on its own soft and hard facilities, in order to further understand the airbag shock absorber installed on the test bench for testing, we will use the simulation model to calculate whether the strength of the designed tooling can meet the test requirements. Simulate the size, weight, rated load, and air pressure value of a test piece, fix the airbag shock absorber on the upper and lower studs of the test bench through the designed test tooling, and conduct vertical tension and compression tests on the test bench. The performance of the airbag shock pad is evaluated by setting the loading rate, amplitude, frequency, and number of cycles of the test machine. Utility Model Content

[0003] In view of the above-mentioned defects or deficiencies in the prior art, it is desirable to provide a universal device for airbag shock absorber size adapted to a fatigue testing machine.

[0004] According to the technical solution provided in the embodiment of the present application, a universal device for airbag shock absorber size suitable for a fatigue testing machine includes an upper cover plate and a lower cover plate, the upper cover plate and the lower cover plate are spaced apart by a spacing, the upper threaded platform is connected to the outwardly disposed side of the upper cover plate by bolts, the lower threaded platform is connected to the outwardly disposed side of the lower cover plate by bolts, the upper cover plate and the lower cover plate are respectively provided with reserved mounting holes of different sizes, system centering holes, optical axis centering holes, side plate centering holes and centering scale lines, a number of reserved mounting holes of different sizes are provided in the middle of the diagonal line of the upper cover plate and on both sides of the centering line, a number of reserved mounting holes of different sizes are provided in the middle of the diagonal line of the lower cover plate and on both sides of the centering line, a number of system centering holes are provided on the centering line of the upper cover plate and the lower cover plate, and an airbag shock absorption test piece is provided at the interval between the upper cover plate and the lower cover plate.

[0005] In the utility model, further, the centering hole of the system and the reserved installation holes of different sizes on both sides of the centering line are spaced 3cm-5cm apart.

[0006] In the utility model, further, a plurality of optical axis centering holes are provided at both ends of the centering line of the upper cover plate and the lower cover plate, and are located on both sides of the system centering hole.

[0007] In the utility model, further, two side plate centering holes are provided at the middle positions on both sides of the upper cover plate and the lower cover plate.

[0008] In the utility model, further, the inner sides of the upper cover plate and the lower cover plate are provided with centering scale lines.

[0009] In the present invention, further, the sizes of the same holes of the upper cover plate and the lower cover plate are consistent and the positions of the holes are also consistent.

[0010] In summary, the beneficial effects of the present application are as follows: in the device, there is a gap between the upper cover plate and the lower cover plate, the upper and lower threaded platforms can be connected to the fatigue testing machine through studs respectively, and the prestressed rings are tightened respectively, the gap between the upper and lower cover plates is confirmed by using a height block and a vernier caliper, and then the gap between the upper and lower cover plates is adjusted to clamp the airbag vibration reduction test piece, the upper and lower cover plates are aligned by using the system centering holes and optical axis centering holes provided on the upper and lower cover plates, and the centering scale line is located on the side of the upper and lower cover plates that is set inward, which is used for centering the airbag vibration reduction test piece. The device provides a universal size that is suitable for the airbag vibration damper of the fatigue testing machine, which can ensure the coaxiality of the hydraulic chuck of the fatigue testing machine, and solves the problem that the same type of airbag vibration reduction test pieces of different sizes cannot be used universally. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0012] Figure 1 It is a schematic diagram of the structure of a universal device for airbag vibration reduction;

[0013] Figure 2 Schematic diagram of the upper and lower cover plates.

[0014] Numbers in the figure:

[0015] 1-upper cover; 2-lower cover; 3-upper threaded platform; 4-lower threaded platform; 5-reserved mounting holes of different sizes; 6-system centering hole; 7-optical axis centering hole; 8-side plate centering hole; 9-centering scale line; 10-airbag vibration reduction test piece. DETAILED DESCRIPTION

[0016] The present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the relevant utility model, rather than to limit the utility model. It is also necessary to explain that, for ease of description, only the parts related to the utility model are shown in the accompanying drawings.

[0017] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0018] like Figure 1As shown, the present application is a universal device for airbag shock absorber size adapted to a fatigue testing machine, which is composed of an upper cover plate 1, a lower cover plate 2, an upper threaded platform 3, a lower threaded platform 4, reserved mounting holes 5 of different sizes, a system centering hole 6, an optical axis centering hole 7, a side plate centering hole 8, a centering scale line 9, an airbag shock absorption test piece 10, etc.;

[0019] like Figure 1 and 2 As shown, the technical solution is further explained in conjunction with the accompanying drawings.

[0020] The environment is idealized, assuming that the temperature and humidity of the operating environment are the same as the laboratory environment, and the pH environment used is also consistent with the atmospheric environment.

[0021] Test equipment assumptions: Assume that the test equipment can meet the needs of its maximum stress, and the flow, pressure, cooling system, etc. of the oil source can fully meet the needs of the test process. Tools in the test equipment such as vernier calipers, tape measures, steel rulers, barometers, and spirit levels have all been calibrated and measured, and are within the qualified validity period, which can minimize the interference of external factors and errors on the modeling.

[0022] The installation method assumes that the screws are tightened from the inside to the outside, first pre-tightening and then tightening diagonally to prevent the installation hole from being skewed and causing stress deviation during the test.

[0023] Torque assumption: assuming that the strength grade of each model of screw is 12.9, it is equipped with spring washers and flat washers during installation, and the tightening torque value of the corresponding specification screw standard is marked.

[0024] There is a gap between the upper cover plate 1 and the lower cover plate 2, and an airbag vibration reduction test piece 10 is arranged at the gap. A centering scale line 9 is arranged on the inner side of the upper cover plate 1 and the lower cover plate 2, which can be used to center the airbag vibration reduction test piece 10. The upper threaded platform 3 is connected to the outer side of the upper cover plate 1 by bolts, and the lower threaded platform 4 is connected to the outer side of the lower cover plate 2 by bolts. The upper threaded platform 3 and the lower threaded platform 4 are respectively provided with threads at one end, which can be respectively connected with the upper and lower studs of the test machine, and then the upper and lower studs are tightened by a prestressed ring. The actual use distance of the airbag vibration reduction test piece 10 is determined by the height block and the vernier caliper, and then the gap between the upper cover plate 1 and the lower cover plate 2 is adjusted, and the airbag vibration reduction test piece 10 is screwed.

[0025] The upper cover plate 1 and the lower cover plate 2 are respectively provided with reserved mounting holes 5 of different sizes, a system centering hole 6, an optical axis centering hole 7, a side plate centering hole 8 and a centering scale line 9. A plurality of reserved mounting holes 5 of different sizes are provided in the middle of the diagonal line and on both sides of the centering line of the upper cover plate 1. A plurality of reserved mounting holes 5 of different sizes are provided in the middle of the diagonal line and on both sides of the centering line of the lower cover plate 2. A plurality of system centering holes 6 are provided on the centering line of the upper cover plate 1 and the lower cover plate 2. The system centering hole 6 and the reserved mounting holes 5 of different sizes on both sides of the centering line are 3cm-5cm apart. A plurality of optical axis centering holes 7 are provided at both ends of the centering line of the upper cover plate 1 and the lower cover plate 2, and are located on both sides of the system centering hole 6. A centering scale line 9 is provided on the inward side of the upper cover plate 1 and the lower cover plate 2. The sizes of the same holes of the upper cover plate 1 and the lower cover plate 2 are consistent and the positions of the holes are also consistent.

[0026] To summarize, the airbag vibration reduction test piece 10 has an airbag in the middle, and both ends of the airbag are fixedly connected to a bottom plate, and the bottom plates are screwed to the opposite sides of the upper cover plate 1 and the lower cover plate 2, respectively. The upper cover plate 1 and the lower cover plate 2 have threaded holes or through holes drilled in a certain size, and then are installed and fixed by screws. Considering that the airbag is placed vertically, when the air pressure is injected into the airbag, the pressure inside the airbag becomes uneven. After actual operation inspection, the higher the frequency of fatigue, the less smooth the displacement load curve is, indicating that part of the pressure reaction force in the middle is not offset, so screws are required for rigid fixation.

[0027] In actual application:

[0028] (1) First, manufacture the various components involved in the airbag shock absorber according to the above requirements;

[0029] (2) A gap is set between the upper cover plate 1 and the lower cover plate 2 and the gap is aligned. An airbag vibration reduction test piece 10 is set at the gap between the upper cover plate 1 and the lower cover plate 2. The airbag vibration reduction test piece 10 can be centered by the centering scale line 9 set on the inner side of the upper cover plate 1 and the lower cover plate 2;

[0030] (3) The upper threaded platform 3 is connected to the outward side of the upper cover plate 1 by bolts, and the lower threaded platform 4 is connected to the outward side of the lower cover plate 2 by bolts. Internal threaded through holes are respectively provided between the upper threaded platform 3 and the lower threaded platform 4, and the upper and lower studs in the testing machine are threadedly connected to ensure the coaxiality of the test, and the test piece is aligned with the test platform so that the tensile pressure applied to the upper and lower studs will not generate angular force due to angle deflection;

[0031] (4) Tighten the prestressed rings at the upper and lower studs respectively, use a height block and a vernier caliper to determine the height of the airbag vibration reduction test piece 10, and adjust the distance between the upper cover plate 1 and the lower cover plate 2 to clamp the airbag vibration reduction test piece 10;

[0032] (5) A plurality of reserved mounting holes 5 of different sizes are provided in the middle of the diagonal line and on both sides of the center line of the upper cover plate 1, and a plurality of reserved mounting holes 5 of different sizes are provided in the middle of the diagonal line and on both sides of the center line of the lower cover plate 2, which can be adapted to the general size of the airbag shock absorber in the fatigue testing machine;

[0033] (6) A plurality of system centering holes 6 are provided at the center line positions of the upper cover plate 1 and the lower cover plate 2, and the upper cover plate 1 and the lower cover plate 2 can be connected in series and the hole positions can be aligned using an optical axis;

[0034] (7) A plurality of optical axis centering holes 7 are arranged at both ends of the centering line of the upper cover plate 1 and the lower cover plate 2, and are located on both sides of the system centering hole 6. The optical axis can be used to align the upper cover plate 1 and the lower cover plate 2, and no torsional force will be generated due to the misalignment and torsion of the upper cover plate 1 and the lower cover plate 2 after the airbag vibration reduction test piece 10 is installed;

[0035] (8) The side plate centering hole 8 is used for lateral test arrangement and centering. The two airbags are placed side by side. By adding a base at both ends and a middle clamping plate, the two airbags can be fixed. Because the airbags are soft, due to material or tooling tolerance issues, the lateral height of the base at both ends of the airbags and the clamping plate in the middle of the two airbags cannot be precisely controlled to be consistent. It is necessary to use the optical axis to calibrate from the side plate centering hole 8, and use the center of the upper cover plate 1 and the lower cover plate 2 as the reference to align the center position of the middle clamping plate.

[0036] (9) The centering scale line 9 is set on the inner side of the upper cover plate 1 and the lower cover plate 2, and the centering scale line 9 is used as a centering reference before the airbag vibration reduction test piece 10 is installed to ensure that the airbag vibration reduction test piece 10 enters the center position of the upper cover plate 1 and the lower cover plate 2;

[0037] (10) After the equipment in the fatigue testing machine is installed, if you want to ensure the repeatability of the test, you need to align the optical axis before you can carry out the subsequent test tasks to prevent the torsional force generated after installation due to the rotation of the upper cover 1 and the lower cover 2. The airbag vibration reduction test piece 10 is fixed by the rigid connection of the upper cover 1 and the lower cover 2. After the airbag vibration reduction test piece 10 is inflated to the actual use pressure, the test can be carried out. It can meet the static test including GB / T15168 and other standards.

[0038] The above description is only an explanation of the preferred embodiments of the present application and the technical principles and other schemes used. At the same time, the scope of the utility model involved in the present application is not limited to the technical scheme formed by a specific combination of the above technical features, but also includes other technical schemes formed by any combination of the above technical features or their equivalent features without departing from the concept of the utility model. For example, the above features are replaced with the technical features with similar functions disclosed in the present application (but not limited to) to form a technical scheme.

Claims

1. A universal device for airbag shock absorber size adapted for a fatigue testing machine, comprising an upper cover plate (1) and a lower cover plate (2), wherein: The upper cover plate (1) and the lower cover plate (2) are spaced apart from each other. The upper threaded platform (3) is connected to a side of the upper cover plate (1) facing outwards by means of bolts. The lower threaded platform (4) is connected to a side of the lower cover plate (2) facing outwards by means of bolts. The upper cover plate (1) and the lower cover plate (2) are respectively provided with reserved mounting holes (5) of different sizes, system centering holes (6), optical axis centering holes (7), side plate centering holes (8) and centering scale lines (9). The upper cover plate (1) is provided with a plurality of reserved mounting holes (5) of different sizes in the middle of a diagonal line and on both sides of a centering line. The lower cover plate (2) is provided with a plurality of reserved mounting holes (5) of different sizes in the middle of a diagonal line and on both sides of a centering line. A plurality of system centering holes (6) are provided on the centering lines of the upper cover plate (1) and the lower cover plate (2). An airbag vibration reduction test piece (10) is provided at the interval between the upper cover plate (1) and the lower cover plate (2).

2. The universal device for airbag shock absorber size adapted to a fatigue testing machine according to claim 1, characterized in that: The system centering hole (6) is spaced 3 cm to 5 cm apart from the reserved mounting holes (5) of different sizes on both sides of the centering line.

3. The universal size device of airbag shock absorber adapted for fatigue testing machine according to claim 1, characterized in that: A plurality of optical axis centering holes (7) are provided at both ends of the centering line of the upper cover plate (1) and the lower cover plate (2), and are located on both sides of the system centering hole (6).

4. The universal size device of airbag shock absorber adapted for fatigue testing machine according to claim 1, characterized in that: Two side plate centering holes (8) are provided at the middle positions on both sides of the upper cover plate (1) and the lower cover plate (2).

5. The universal size device of airbag shock absorber adapted for fatigue testing machine according to claim 1, characterized in that: A centering scale line (9) is provided on the inwardly facing side of the upper cover plate (1) and the lower cover plate (2).

6. The universal size device of airbag shock absorber adapted for fatigue testing machine according to claim 1, characterized in that: The sizes of the same holes of the upper cover plate (1) and the lower cover plate (2) are consistent and the positions of the holes are also consistent.

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