CN104175985B - Buffering automobile collision system based on magnetic control clay - Google Patents

Abstract

The present invention provides a kind of buffering automobile collision system based on magnetic control clay, including: inside is filled with buffering capsule and the magnetic buffering pressure relief device of magnetic control clay, described buffering capsule is arranged on outside automobile collision preventing baffle plate, and described magnetic buffering pressure relief device seals with magnetic buffering capsule and connects.Buffer device for collision of automobile is effectively divided into three extruding stream bufferings by the present invention, goes for the collision of friction speed；Utilize many diaphragm structures be effectively increased under smaller size smaller three grades of controlled magnetic control clay circulation damp channel length, make device can absorb collision energy to greatest extent, be greatly reduced collision occur time the automobile injury to driver and crew.

Description

Automobile collision buffer system based on magnetic control cement

technical field

The present invention relates to the technical field of automobile collision, in particular to an automobile collision buffer system based on magnetic control glue.

Background technique

In recent years, with the rapid increase in the number of cars in our country, traffic safety has become a very important topic. Passive safety technology for cars is the top priority, and it is the only guarantee to prevent drivers and passengers from being disabled or even killed. When a car collides head-on, the kinetic energy of the collision is absorbed and the impact force is reduced mainly through the front buffer energy-absorbing assembly. At present, most of the automobile buffer energy-absorbing devices are mainly purely mechanical structures, pneumatic or hydraulic methods designed for the specific collision intensity of automobiles. These methods have gradually failed to meet people's needs for automobile safety. In recent years, with the development of science and technology, the magnetorheological damper has been more and more widely used. The magnetorheological damper is a kind of shock absorbing device for semi-active control suspension that has appeared in the past two decades. It has a simple structure , The damping force is continuous and adjustable, and the damping force can be adjusted in a large range, fast in response, excellent in stability, and can be combined with microcomputer control. At present, magnetorheological dampers have been used in vehicle suspension systems, cable-stayed bridges, etc. The vibration control of cables, the vibration reduction of offshore platform structures and the vibration isolation of high-rise buildings have been initially applied, showing a good application prospect. However, due to the cost and the problem of particle settlement in the magnetorheological fluid itself, the magnetorheological damper has not been widely used in civilian vehicles at present, and most of them are used in some high-end vehicles and military equipment, and the current magnetorheological The damper cannot be adaptively adjusted according to the characteristics of the car when it collides, which has great limitations.

Contents of the invention

In view of this, the present invention provides a car collision buffer device based on magnetic control glue, which can self-adaptively adjust the stiffness and damping force of the buffer device when the car collides, so as to maximize the protection of the car when the car collides. Driver and crew.

The automobile collision buffer system based on magnetic control cement provided by the present invention includes: a buffer capsule filled with magnetic control cement and a magnetic buffer pressure relief device. The pressure device is in sealing communication with the buffer capsule.

Further, it also includes a bumper crushing beam, one end of the bumper crushing beam is in sealing communication with the buffer capsule, and the other end is in sealing communication with the magnetic buffering pressure relief device, and the inside of the magnetic force buffering pressure relief device is connected with the vehicle crushing beam and The cushioning capsules are connected internally.

Further, the magnetic buffering pressure relief device at least includes a buffering inner cylinder and an exciting coil wrapped around the buffering inner cylinder;

Both ends of the buffer inner cylinder are provided with orifices, one end of the buffer inner cylinder communicates with the buffer capsule through the bumper crush beam, and the other end of the buffer cylinder is provided with a pressure cover outside the flow hole;

The inside of the buffer inner cylinder is provided with an isolation plate that isolates the interior of the buffer cylinder into two cavities, and the isolation plate is provided with a throttle hole connecting the two cavities;

A buffer plate is fixedly arranged in the two isolation cavities respectively, and there is a liquid flow gap between the buffer plate and the side wall of the buffer inner cylinder.

Further, a buffer outer cylinder is arranged outside the buffer inner cylinder, and a sealed space for installing an excitation coil is formed between the buffer inner cylinder and the buffer outer cylinder.

Further, the buffer capsule is installed between the outer side of the crash baffle and the automobile bumper shell, and an orifice is arranged on the crash baffle through which the buffer capsule communicates with the inside of the bumper crush beam.

Furthermore, the bumper crush beam adopts a bellows structure, one end is fixedly connected to the inner side of the automobile anti-collision baffle, and the other end is fixedly connected to the automobile longitudinal beam.

Further, it also includes: a controller for controlling the output current of the excitation coil and a detection device for detecting the collision speed of the vehicle, the controller controls the output current of the excitation coil according to the collision speed detected by the detection device, and controls when the vehicle collides The damping force generated by the magnetic buffer pressure relief device.

Further, the magnetron mastic includes: elastic mastic, carbonyl iron powder and additives, and the main component of the elastic mastic is organopolysiloxane.

Further, there are at least two buffer capsules and magnetic buffer pressure relief devices, and they are symmetrically distributed inside the anti-collision baffle.

Further, the buffer capsule is a curved wedge-shaped structure with vulcanized steel wire or cotton net inside.

Beneficial effects of the present invention: the present invention effectively divides the automobile collision buffer device into three squeeze flow buffer settings to form a three-stage buffer, which can be applied to collisions at different speeds; the multi-baffle structure is effective in a small volume The length of the flow damping channel of the three-stage controllable magnetic control glue is increased, so that the device can absorb the collision energy to the maximum extent, and greatly reduce the damage of the car to the driver and passengers when the collision occurs; when the collision occurs, the magnetic buffer pressure relief device Control the output current of the excitation coil according to the collision speed of the vehicle, and control the damping force generated when the vehicle collides. The magnetic control cement material adopted in the present invention combines the advantages of elastic cement and magnetorheological fluid, can well prevent carbonyl iron particles from settling, and has the characteristics of excellent performance, aging resistance and high temperature resistance. In addition, the present invention has a compact structure, little modification to the existing car models, and only improves the structure of the existing bumper and longitudinal beam of the car, and is suitable for installation and replacement on different existing car models.

Description of drawings

The present invention will be further described below in conjunction with accompanying drawing and embodiment:

Fig. 1 is a schematic diagram of the structure principle of the present invention.

detailed description

As shown in Figure 1, the automobile collision buffering system based on magnetic control glue comprises: cushioning capsule 15, bumper crush beam 19, automobile bumper shell 18, automobile longitudinal beam 20, anti-collision baffle plate 10, orifice ( 5, 6, 12, 13), diversion tube 14, end cap 2, excitation coil 1, excitation coil inner cylinder 8, excitation coil outer cylinder 9, isolation plate 4, buffer plate 7, pressure cover plate 3, detection device 16 and controller 17.

As shown in Figure 1, the cushioning capsule 15 is arranged between the anti-collision baffle 10 and the bumper shell 18, and is sealed and installed on the outside of the anti-collision baffle 10 to form a first-stage magnetic control glue buffer container; the bumper crush beam 19 One end of the bumper is fixed and sealed on the inner side of the anti-collision baffle 10, and the other end is sealed and connected with the longitudinal beam 20 of the vehicle to form a second-stage magnetic control glue buffer container; The orifice 13 communicates with the first-stage magnetically controlled glue buffer container, and one end of the bumper crush beam connected to the longitudinal beam of the vehicle communicates with one end of the guide tube 14 through the throttle hole 12 arranged on the longitudinal beam of the vehicle; the guide tube 14 The other end is connected to the end cover 2; the end cover 2 is arranged on one side of the vehicle longitudinal beam; the isolation plate 4 and the buffer plate 7 are placed at a certain distance in the inner cylinder 8 of the excitation coil, and the two ends of the inner cylinder 8 of the excitation coil are connected to the end cover 2 An airtight buffer inner cylinder is formed, and the buffer inner cylinder constitutes a third-stage magnetic control cement buffer container. The excitation coil outer cylinder 9 is installed on the outside of the excitation coil 1 and connected to the inner side of the two end covers 2. The excitation coil outer cylinder 9 is the buffer outer cylinder of the magnetic buffer device. The excitation coil is installed between the buffer inner cylinder and the buffer outer cylinder. Both sides of the inner cylinder and the buffer outer cylinder are provided with end caps 2, so there is a sealed space between the buffer inner cylinder and the buffer outer cylinder, and the excitation coil is installed in the sealed space, which has the function of shielding interference and avoiding damage by external forces; The cover plate 3 is installed at the throttle hole 5 of the end cover 2; the controller 17 is respectively connected with the excitation coil 1 and the detection device 16.

In this embodiment, the first-stage magnetic control glue buffer container, the second-stage magnetic control glue buffer container and the third-stage magnetic control glue buffer container are connected internally, and are filled with magnetic control glue 11. When the automobile collides, the automobile insurance The bumper shell is deformed by impact, so that the cushioning capsule 15 is squeezed, and the magnetically controlled cement 11 in the first-stage magnetically controlled cement buffer container flows into the second-stage magnetically controlled spacer in the inner cavity of the automobile bumper crushing beam 19 through the orifice 13. The cement buffer container forms the first extrusion flow buffer, while the magnetically controlled cement in the cavity of the automobile bumper crush beam 19 flows to the third-stage magnetically controlled cement buffer container through the guide tube 14 installed on the automobile longitudinal beam, forming In the second extrusion flow buffering, the magnetron cement 11 passes through the flow path in the container III consisting of the isolation plate 7, buffer plate 4, and excitation coil inner cylinder 8 to open the pressure cover plate 3 to form the third controllable extrusion flow buffering . The pressure cover plate 3 is a pressure relief cover, which can be flushed open to release pressure when the pressure in the third-stage magnetron cement buffer container reaches a certain value. In this embodiment, the buffer plate 7 is installed on the excitation coil inner cylinder 8, and the buffer inner cylinder is divided into two buffer cavities 21, the buffer cavities 21 are respectively equipped with isolation plates 7, and the buffer plate 4 and the isolation plate 7 are separated from each other. at a certain distance. Adopting this structure can effectively increase the length of the circulation damping channel of the three-stage controllable magnetic control cement with a small volume, so that the buffer device can absorb the collision energy to the greatest extent.

In this embodiment, the controller 17 detects the relative speed between the automobile and the obstacle through the detection device 16, and judges whether the automobile will collide and the collision speed when the collision occurs. The magnetic field in the hole will increase, and the resistance of the magnetic control cement to flow through the orifice will increase accordingly, so that the damping force output by the damper will increase. On the contrary, the current will decrease, and the damping force will also decrease. Different collision speeds, adaptively adjust the output current of the excitation coil in the magnetic buffer pressure relief device, and change the stiffness and damping of the three-stage buffer structure respectively, greatly reducing the damage to the driver and passengers when the car collides. In this embodiment, a controllable power supply is used to connect with the controller and the excitation coil respectively, and the controller controls the output current of the controllable power supply according to information such as the collision speed detected by the detection device, so as to realize the control of the output current of the excitation coil, and then Controlling the damping force generated by the magnetic buffer pressure relief device, in the prior art, there are many ways to control the output current. Those skilled in the art can clearly understand the specific implementation process, so it is not marked in the drawings.

In this embodiment, the automobile bumper crushing beam 19 adopts a bellows structure, which can deform the bumper crushing beam when the automobile is severely collided, and produce a certain buffering effect for the collision, further increasing the safety of the automobile collision sex.

The magnetron cement 11 used in this embodiment is mainly composed of elastic cement, carbonyl iron powder, and additives. The main component of elastic cement is organopolysiloxane, and the main chain is composed of Si-O-Si bonds. The bond energy of Si-O bonds is much greater than that of C-C bonds and does not contain double bonds, so it has aging resistance and high temperature resistance. (-80 ~ 250 ℃) performance, the shear yield stress can reach 120 kPa, the response time is about 50 milliseconds, the magnetic control viscosity adjustment range is wide (about 15 to 20 times), and the volume can be compressed by 10% under the external load. to 15%, and non-toxic and harmless. Magnetic control cement combines the advantages of elastic cement and magnetorheological fluid. It has both fluid characteristics and magnetic effect characteristics. Due to the high viscosity and special helical structure of elastic cement, it can well prevent the carbonyl iron particles from settling. This makes the magnetron cement a magnetorheological material with excellent performance. The application of this material can have both low-speed collision performance and high-speed self-adaptive adjustment performance when a car collides.

In this embodiment, the buffer capsule 15 is a wedge-shaped structure with a built-in steel wire or cotton net vulcanized and with a certain curvature; the end cover 2, the outer cylinder of the excitation coil 9, the isolation plate 4 and the buffer plate 7 are all low-carbon materials with high magnetic permeability. steel; the excitation coil inner cylinder 8 is stainless steel with low magnetic permeability; the excitation coil 1 is wound by enamelled copper wire.

In this embodiment, the detection device adopts a radar detection device, and four radar detection devices are installed on the same horizontal line outside the automobile anti-collision baffle, and other devices that can realize the same function as a distance sensor can also be used. Detect obstacles and transmit the detected data to the controller. The controller can also judge the relative speed between the car and the obstacle and how the car collides with the obstacle based on the detected data, such as frontal collision, oblique collision, bias Peng, etc., this speed detection method is a prior art, and those skilled in the art can easily understand how to implement it, so the specific detection process will not be repeated here.

Finally, it is noted that the above embodiments are only used to illustrate the technical solutions of the present invention without limitation. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be carried out Modifications or equivalent replacements without departing from the spirit and scope of the technical solution of the present invention shall be covered by the claims of the present invention.

Claims (9)

1. A car collision buffering system based on magnetic control cement, characterized in that: at least comprising: a buffer capsule and a magnetic force buffer pressure relief device filled with magnetic control cement inside, the buffer capsule is installed on the outside of the automobile anti-collision baffle, The magnetic buffer pressure relief device is in sealing communication with the buffer capsule; It also includes a bumper crushing beam, one end of the bumper crushing beam is in sealing communication with the buffer capsule, and the other end is in sealing communication with the magnetic buffer pressure relief device, and the inside of the magnetic buffer pressure relief device is connected to the buffer capsule through the automobile crushing beam internal connectivity. 2. The automobile collision buffer system based on magnetic control cement according to claim 1, characterized in that: the magnetic buffer pressure relief device at least includes a buffer inner cylinder and an excitation coil that is overlaid on the buffer inner cylinder; Both ends of the buffer inner cylinder are provided with orifices, one end of the buffer inner cylinder communicates with the buffer capsule through the bumper crush beam, and the other end of the buffer inner cylinder is provided with a pressure cover outside the flow hole; The inside of the buffer inner cylinder is provided with an isolation plate that isolates the interior of the buffer cylinder into two cavities, and the isolation plate is provided with a throttle hole connecting the two cavities; A buffer plate is respectively fixed in the two cavities, and there is a liquid flow gap between the buffer plate and the side wall of the buffer inner cylinder. 3. The automobile collision buffer system based on magnetic control cement according to claim 2, characterized in that: a buffer outer cylinder is arranged outside the buffer inner cylinder, and an excitation coil is formed between the buffer inner cylinder and the buffer outer cylinder sealed space. 4. The automobile collision buffer system based on magnetic control glue according to claim 3, characterized in that: the buffer capsule is arranged between the outer side of the anti-collision baffle and the outer shell of the automobile bumper, and the anti-collision baffle is provided with a throttling The cushion capsule communicates with the inside of the bumper crush beam through the throttle hole. 5. The automobile collision buffer system based on magnetic control glue according to claim 4, characterized in that: the bumper crush beam adopts a bellows structure, one end is fixedly connected to the inner side of the automobile anti-collision baffle, and the other end is fixedly connected to the car stringer. 6. The automobile collision buffer system based on magnetic control glue according to claim 5, characterized in that: it also includes: a controller for controlling the output current of the excitation coil and a detection device for detecting the collision speed of the automobile, the control According to the collision speed detected by the detection device, the controller controls the output current of the excitation coil, and controls the damping force generated by the magnetic buffer pressure relief device when the car collides. 7. According to the automobile collision buffer system based on magnetic control cement according to claim 6, it is characterized in that: said magnetic control cement comprises: elastic cement, carbonyl iron powder and additives, and the main component of said elastic cement is organopolysiloxane alkyl. 8. The automobile collision buffer system based on magnetic control glue according to claim 7, characterized in that: the number of the buffer capsules and the magnetic buffer pressure relief devices is at least two, and they are symmetrically distributed inside the anti-collision baffle. 9. The automobile collision buffer system based on magnetic control cement according to claim 8, characterized in that: the buffer capsule is a curved wedge-shaped structure with built-in steel wire or cotton net vulcanized.