Emergency braking device

FIELD: mechanical engineering; transport engineering; brakes.

SUBSTANCE: proposed device contains brake mechanism installed of frame and brought in contact with roadbed, and brake mechanism power drive system. Device is furnished with system to absorb kinetic energy of vehicle. Said system is made in form of cross axle with outer tread rigidly secured to frame and two reels turned onto thread with opposite directions of linear displacement along thread and wire ropes wound on reels, also sets of plate disks made of viscoplastic material freely fitted on axle between outer end faces of reels and stops to secured ends of axle to frame and brought in contact with each other by identical end face rough surfaces and tube of elastic plastic material freely fitted on axle and connecting end faces of reels pointed to each other. Tube is provided with alternating slots orientated square to longitudinal axis of tube. System of power drive of brake mechanism is made in form of housing with built-in explosive cartridge furnished with electric igniter installed on vehicle frame with tilting in direction of straight-ahead movement behind axle with reels. Brake mechanism is essentially rod on end of which is driven inside housing of power drive to contact with explosive cartridge, and other end is furnished with wedge to drive rod into roadbed material. Middle part of rod has fork to connect rod with free ends of ropes wound on reels.

EFFECT: improved efficiency of braking, simplified design of device.

3 cl, 2 dwg

 

The invention relates to the field of transport engineering and can be used for fast clearing speed of the vehicle in emergency situations.

Know the emergency brake device of a vehicle, containing a closed brake the tape support rollers and telescopic folding arm, suspended to a frame of the vehicle and entered into contact with the wheel and the road surface, and the system actuator to bring the lever in the working and transport position (see A.S. USSR №1301738, CL 60 T 1/14, 1985 [1]/.

The disadvantages of the known devices are a significant design complexity, and most importantly - low braking performance and a large braking distance due to a significantly extended time in the process of converting the kinetic energy of motion of the vehicle in the braking forces.

It is also known emergency brake device containing suspended to the body of the brake Shoe and secured to the underside of the vehicle power hydraulic mechanism for lifting and lowering of the Shoe, comprising a hydraulic cylinder with a rod return spring and the rotary lever /see U.S. patent No. 3994369, CL 188-5, 1976 [2].

The disadvantages of the known devices are low braking performance and a relatively large brake PU is e l e C because of the low intensity of the dissipation of the kinetic energy of the vehicle when the friction Shoe with tires on the pavement, the need for a significant duration of this process and a large braking to a complete quenching of the kinetic energy of moving vehicles.

The closest device to the same destination to the claimed invention is the emergency brake device of a vehicle, containing mounted on the frame of the vehicle brake mechanism, introduced in contact with the road surface, and the hydraulic actuator of the brake mechanism comprising a hydraulic cylinder with the rod and the mechanism of its vertical movement, a return spring and the rotary lever /see A.S. USSR №1366436, CL 60 T 1/14, 1986 [3]and adopted for the prototype.

The drawbacks of the prototype are low braking performance and a large braking distance in both complex structures, a significant number of contact hydromechanical nodes.

The invention relates to changing the principle of operation of the known devices. In all known braking devices for emergency situations qualitatively preserved the principle of the conventional brake device, and the l is provided for converting the kinetic energy in the braking forces carried out only by increasing the contacting zones and the nature of the contact of the Shoe with spikes with the road, the brake bands to the wheels and the road surface, etc. This leads to the principle of a slow process of clearing the kinetic energy, poor braking performance, significant braking distance. In the proposed emergency brake device implemented process almost instantaneous braking with rigid fixation of the vehicle relative to the road, accompanied by high-intensity pulsed converting the kinetic energy of the vehicle into the energy of viscoelastic deformation by introducing into its design a special energy-absorbing device of high efficiency, elastically and plastically deformed until the destruction of the braking process, but does not affect the survivability of the vehicle. The principle of operation of such devices similar to devices for protecting vehicle at impact collisions, providing an introduction to the design of the vehicle special energy-absorbing plastically deformable and destructible items and units: enclosures, frames, bumpers, racks, etc. that are not subject to the majority of recovery, but life-saving passengers. In the proposed device such energy-absorbing site, differing fundamentally new design performs very different functions: on which absorbs the kinetic energy of the collision of the vehicle with an obstacle, and kinetic energy almost instantly braking of the vehicle due to hard contact with the road surface, transforming it into energy elastic-plastic deformation of the energy absorbing elements of the node.

The technical result is an increase in braking performance and simplify the design of the device.

This technical result in the implementation of the invention is achieved in that in the known emergency brake device of a vehicle, containing mounted on the frame of the vehicle brake mechanism, introduced in contact with the road surface, and the system actuator of the brake mechanism, the peculiarity lies in the fact that the braking device is equipped with a system of absorption of the kinetic energy of the vehicle, made in the form of rigidly attached to the frame transverse axis with an external thread and screw her two coils with opposite directions of linear movement of carving and wound ropes, sets the disc drive of a viscoplastic material, freely mounted on the axle between narozniki the ends of the coils and lugs for fastening the ends of the axle to the frame and brought into contact with each other identical end surfaces rough, and connecting the internal, OID is placed to each other the ends of the coils and loosely attached to the tube axis of the elastic-plastic material with slotted alternating slits oriented perpendicular to the longitudinal axis of the tube, the system actuator of the brake mechanism is in the form mounted on the frame of the vehicle with an inclination in the direction of its movement and behind the axle with coil housing with built-in cutter, equipped with electric blasting and the braking mechanism is a rod, one end of which is introduced into the housing actuator to contact with the actuator, the other end is provided with a wedge for the introduction of the rod into the material of the roadway, and the middle part of the rod is provided with a plug for connection rod with the free end is wound on a coil of ropes. In each half-axis carving can be done with opposite directions of cutting, and the cable can be wound on the coil in opposite directions.

The invention is illustrated by drawings, where figure 1 schematically illustrates a braking device, General view; figure 2 - view And /bottom/ system absorption of the kinetic energy.

Emergency brake device of the vehicle contains mounted on the frame 1 /the underside of the vehicle/ motor vehicle brake mechanism, introduced in contact with the road surface 2, and the system actuator of the brake mechanism, while tormoznoy the device is equipped with a system of absorption of the kinetic energy of the vehicle, made in the form of rigidly attached to the frame 1 by means of lugs 3 nuts 3 transverse axis 4 with an external thread and screw her two coils 5, 6 with opposite directions of linear movement during the rotation of the threaded axis 4 and wound cables 7, 8, sets the disc drive 9 out of plastic material, freely mounted on the axle 4 between the outer ends of the coils 5, 6 and flat lugs 3 for fastening the ends of the axis 4 to the frame 1 and brought into contact with each other identical end surfaces rough, and connecting the internal facing each other the ends of the coils 5, 6 and freely mounted on the axle 4 of the tube 10 of an elastic-plastic material, having a slotted alternating slits 11, oriented perpendicular to the longitudinal axis of the tube 10, the system actuator of the brake mechanism is in the form mounted on the frame 1 of the vehicle with an inclination in the direction of its movement and behind the axis 4 with the coils 5, 6 of the housing 12 with a built-in actuator with electric blasting and the braking mechanism is a shaft 13, one end of which is introduced into the housing 12 of the power actuator to contact with the actuator, the other end equipped with a wedge 14 for the introduction of the rod 13 into the material of the roadway 2, and the middle part of the stem 13 is provided pitchfork is Oh 15 for connection rod 13 with the free ends of the wound coils 5, 6 cables 7, 8. This opposite direction of linear movement of the coils 5, 6 to the thread axis 4 are provided either by performing on each of the halves of the axis 4 in the zones of displacement of the coils 5, 6 Narodna thread with opposite directions of cutting, or by winding the cables 7 and 8, respectively, to the coils 5, 6 in opposite directions. As elastoplastic materials for the tube 10 with the slit grooves 11 used aluminum alloy, and as a viscoplastic material for disc drives 9 applied Teflon, with considerable roughness of the contacting end surfaces of the disks 9 achieved through special deep reticulated knurling. The wedge 14 is made of hardened steel high strength for reliable introduction of the shot into the material of the roadway 2. System absorption of the kinetic energy in the form of a transverse axis 4 with the coils 5, 6, the tube 10, the disks 9 must be installed on the frame 1 of the vehicle in front in the course of the vehicle with respect to the brake mechanism and the system of its actuator. Thus the rigidity of the mounting axis 4 to the frame 1 by means of lugs 3 nuts 3 should be significant, namely the drag force on the margin of this block should significantly exceed the drag force exerted by the tube 10 and the disk 9 when the PLA is political, accordingly, the stretching-twisting further shear deformation and rupture and dry friction of rough surfaces with significant normal pressure with further twisting, abrasion and destruction. Therefore, in the frame structures of the vehicle, the ends of the axis 4 are mounted directly to the frame 1, and frameless designs to the bottom of the body in special places with enhanced strength and rigidity. Power button emergency brake device displayed directly on the control panel of the car. In private cases, the triggering of the emergency braking device can be either sharper or deeper pedal the main brake device.

The operation of the device is as follows.

As a result of critical emergency emergency braking device is actuated simultaneously with the action of the main brake system. This triggers the inflator of the actuator, the shot is made, the rod 13 with the wedge 14 is embedded in the material of the roadway 2. Of course, the rod 13 remains fixed in the road surface and the vehicle together with the axis 4 with the coils 5, 6 connected by cables 7, 8 with the rod 13, continues to move right along in figure 1. Because the cables 7, 8 are wound on reels 5, 6 in FR the opposite directions /in figure 2, the free end of the rope 7, attached to the plug 15, is coming off of the coil 5 from the top between the axis 4 and the frame 1, and the free end of the rope 8 is coming off the coil 6 from the bottom between the axis 4 and the road surface 2/, then carved pulse tension loose ends of the cables 7, 8, connected with the rod 13, will lead to intensive rotation of the reels 5, 6 to the thread axis 4 in opposite directions with simultaneous linear removal along the axis 4 of carving from each other in the direction of the stops 3. Such movement of the coils 5, 6 will, on the one hand /in the literal and figurative meanings/, considerable elastic-plastic tensile deformations with wrinkling and twisting, until the rupture of the perforated tube 10, when her slit holes 11 will first turn into rhombic, will be twisting, swelling and subsequent rupture of the walls between the holes, etc. and on the other hand simultaneous relative scrolling and compression viscoplastic rough disc drive 9 /dry friction of rough surfaces with the huge normal pressures/. Thus due to the simultaneous rotation and linear displacement of the coils 5, 6 disks 9, while inching close to each other rough surfaces are deformed, buying from a flat disc shape, and then begin to rapidly be used up and viscoplastic to collapse. In others the d variant of the cables 7, 8 wound on reels 5, 6 in one direction, however, the two axis 4 in the zone of movement of the coils 5, 6 thread made with opposite directions of cutting, so that the coils 5, 6 when they are rotating in the same direction linearly walked away from each other, tearing through the tube 10 and compressing the discs 9. It is obvious that the above described design of the system to absorb the kinetic energy has significant energy /ability energobaltia/, which leads to extremely high efficiency of quenching of the kinetic energy of the vehicle, a sharp decrease in its speed, shorter braking distances. In the proposed system, the energy absorption is carried out both by dry friction of a significant number of contacting surfaces with large coefficients of friction and a huge normal pressures, and due to the viscoelastic and plastic deformations of elements and nodes until their final destruction, not affecting the survivability of the vehicle. Moreover, the emergency and the main brake systems operate simultaneously and independently from each other, which allows to achieve the maximum possible effect. By selection of the geometrical and mechanical characteristics of the whole system to absorb the kinetic energy can achieve the pre-specified efficacy of t is omogenia offered by the device, valid values braking distance at a given speed of the vehicle, etc.

According to the applicants, the proposed device is quite effective, has a relatively simple design, significant structural and technological possibilities for variation with the whole getting various tactical and technical parameters, functionality, applications, and therefore able to find a practical application.

1. Emergency brake device of a vehicle, containing mounted on the frame, the brake mechanism is introduced into contact with the road surface, and the system actuator of the brake mechanism, wherein the brake device is equipped with a system of absorption of the kinetic energy of the vehicle, made in the form of rigidly attached to the frame transverse axis with an external thread and screw her two coils with opposite directions of linear movement of carving and wound ropes, sets the disc drive of a viscoplastic material, freely mounted on the axle between the outer ends of the coils and lugs for fastening the ends of the axle to the frame and brought into contact with each other identical end surfaces rough, and connecting internal obrashena is to each other the ends of the coils and loosely attached to the tube axis of the elastic-plastic material with slotted alternating slits oriented perpendicular to the longitudinal axis of the tube, the system actuator of the brake mechanism is in the form mounted on the frame of the vehicle with an inclination in the direction of its movement and behind the axle with coil housing with built-in cutter, equipped with electric blasting and the braking mechanism is a rod, one end of which is introduced into the housing actuator to contact with the actuator, the other end is provided with a wedge for the introduction of the rod into the material of the roadway, and the middle part of the rod is provided with a plug for connection rod with the free end is wound on a coil of ropes.

2. The device according to claim 1, characterized in that each half-axis carving made with opposite directions of cutting.

3. The device according to claim 1, characterized in that the cables are wound on the coil in opposite directions.



 

Same patents:

Emergency brake // 2274566

FIELD: mechanical engineering; brakes.

SUBSTANCE: proposed device contains brake mechanism installed o frame of vehicle and brought in contact with road bed, and power drive system of brake mechanism. Device is furnished with system to absorb kinetic energy of vehicle in form of slider made as stepped rectangular plate freely placed with clearances in space of box-section guide rigidly secured to frame. Plates of plastic material are secured inside guide to its bases by ribs to overlap working stroke of slider, plates being set at acute angle relative to direction of working stroke of slider. Power drive system of brake mechanism is made in form of housing installed on vehicle frame at tilting in direction of vehicle running with built-in explosive cartridge with electric igniter. Brake mechanism is essentially rod, one end of which is driven into housing of power drive to contact with explosive cartridge, and other end is furnished with wedge to drive rod into road bed material. Coupling link of brake mechanism with slider of energy absorbing system is freely fitted in middle part of rod between two stops.

EFFECT: improved efficiency of braking, simplified design of device.

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Emergency brake // 2274566

FIELD: mechanical engineering; brakes.

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