CN202092847U - Safety detecting device of key position structure of large-size passenger bus - Google Patents

Abstract

The utility model belongs to the technical field of detection of safety of vehicle structures and discloses a safety detecting device of a key position structure of a large-size passenger bus. The detecting device mainly comprises a three-dimensional gantry framework machine body, an impact pendulum bob, a hoisting machine, a tripping device, a measurement and control system, a hydraulic system and a test platform. The test platform is provided with a vehicle fixing device. A key position of the large-size passenger bus is hammered by the impact pendulum bob in order to realize safety assessment of the vehicle body structure of the large-size passenger bus. A test of tipping of the whole vehicle is effectively replaced and cost of the safety detecting test of the vehicle body structure is reduced.

Description

A kind of motor bus key position safety of structure pick-up unit

Technical field

The utility model belongs to vehicle structure security detection technique, relates to a kind of motor bus key position safety of structure pick-up unit.

Technical background

Taking place in recent years in a lot of motor bus traffic hazards, except the fire incidents of spontaneous combustion, nearly all is that rollover is unexpected, and when especially rollover accident took place, the occupant's injures and deaths that cause were even more serious.Find by the accident case analysis: the unexpected back motor bus superstructure gross distortion that takes place of rollover, top of car even all raise.This shows that the vehicle structure security detects the importance for the passenger safety protection.

Domestic and international motor bus structural strength rules, most is the main project of primary structure intensity detection with car load rollover test all.But because there is the experimentation cost height in it, many unfavorable objective factors such as have a big risk, motor bus superstructure Strength Safety rules GB 17578-1998 still fails to put teeth at home at present.Consider based on this kind factor, the utility model proposes a kind of equivalent substitution pick-up unit, i.e. motor bus key position safety of structure pick-up unit.

Summary of the invention

At the deficiency of above-mentioned technology, the purpose of this utility model is to provide a kind of experimentation cost low, the safety of structure pick-up unit that risk is little.

In order to achieve the above object, the utility model is achieved by the following technical solutions.

Motor bus key position safety of structure pick-up unit, it is characterized in that, form by three-dimensional gantry frame fuselage, impact pendulnm, windlass, trip mechanism, TT﹠C system, hydraulic system and test-bed body etc., described test-bed body is used for fixing motor bus structure intercept skeleton, and tool is adjusted function.

Discover that by a large amount of complete vehicle tests structure is the hazardous location that motor bus rollover process is easy to generate moderate finite deformation most near the roof side rail of motor bus top.This pick-up unit is chosen the top roof side rail as the motor bus key position, and its test philosophy is identical with car load rollover test, can effectively utilize pendulum and impact motor bus key position replacement car load rollover test.Using impact pendulnm bump motor bus top roof side rail to be equivalent to the car load rollover contacts with ground.Utilize the hydraulic system adjustment that the test-bed body of motor bus structure intercept skeleton is housed, it is different because of height of the carbody that it adjusts angle, can determine by the car load high computational.

Description of drawings

Below in conjunction with the drawings and specific embodiments the utility model is described further.

Fig. 1 is the floor map of motor bus key position safety of structure pick-up unit of the present utility model;

Fig. 2 is the schematic perspective view of motor bus key position safety of structure pick-up unit of the present utility model;

Wherein: 1 is three-dimensional gantry frame fuselage device; 2 is impact pendulnm; 3 is windlass; 4 is trip mechanism; 6 is hydraulic system; 7 is test-bed body.

Embodiment

With reference to Fig. 1,2, motor bus key position safety of structure pick-up unit mainly comprises: three-dimensional gantry frame fuselage device 1, impact pendulnm 2, windlass 3, trip mechanism 4, TT﹠C system, hydraulic system 6, test-bed body 7.Test philosophy is identical with the rollover test, but the rollover test needs bigger test site, and the experimental enviroment method to set up is comparatively numerous and diverse, therefore uses this method to detect the motor bus frame strength, and is comparatively easy in the utilization of space and time.The test of vehicle body intercept utilizes the pendulum impact to replace the rollover bump, uses pendulum impact skeleton to be equivalent to ground and skeleton bump.

Motor bus key position safety of structure pick-up unit, the striking face of impact pendulnm 2 is answered the steel plate of used thickness 20 ± 5cm, and pendulum weight should evenly distribute.The striking face of pendulum should be rectangle plane, and its width should be not less than the width of test vehicle body intercept, and height should be not less than 80cm, and the radius-of-curvature at its edge should be not less than 15cm.The pendulum body should firmly be installed on two rigid supports, and the wheelbase of two stands should be not less than 3.5m from the geometric center lines of pendulum body.

Described test-bed body 7 concrete controllabilitys, default setting guarantee that the crash direction of pendulum becomes 25 degree angle (+0 degree with vertical vertical center line of vehicle body intercept;-5 degree).Described hydraulic system 6 is used to support test-bed body, adopts hydraulic jack lifting test table top, and during with equivalent differing heights motor bus rollover and the variation of ground contact angle, its angle is calculated according to formula (1).

$\mathrm{\α}=\arcsin \left(\frac{800}{H_C}\right)$

In the formula: Hc is the vehicle roof side rail height that vehicle parking records on surface level, mm.

Described TT﹠C system 5 is in order to real-time monitoring test stage body lifting angle and impact pendulum 2 impact velocitys.When impact pendulnm of the present utility model collision is installed, use high-speed camera, distortion rule or other suitable mode to meet the requirement of safety of structure rules GB 17578-1998 to confirm it.

The inventor shows by simulation analysis and test: motor bus key position safety of structure pick-up unit of the present utility model is equivalent substitution car load rollover test effectively; reduce the body construction security and detect experimentation cost, protect the occupant safety of motor bus effectively.

Claims (4)

1. motor bus key position safety of structure pick-up unit, it is characterized in that, form by three-dimensional gantry frame fuselage, impact pendulnm, windlass, trip mechanism, TT﹠C system, hydraulic system and test-bed body etc., tool support fixation assembly on the described test-bed body, its testing table mask controllability.

2. motor bus key position safety of structure pick-up unit according to claim 1 is characterized in that the striking face of pendulum is answered the steel plate of used thickness 20 ± 5cm, and pendulum weight evenly distributes.

3. motor bus key position safety of structure pick-up unit according to claim 1, it is characterized in that the striking face of pendulum should be rectangle plane, its width should be not less than the width of test vehicle body intercept, height should be not less than 80cm, and the radius-of-curvature at its edge should be not less than 15cm.

4. motor bus key position safety of structure pick-up unit according to claim 1 is characterized in that the pendulum body should firmly be installed on two rigid supports, and the wheelbase of two stands should be not less than 3.5m from the geometric center lines of pendulum body.

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