CN101962002B - Anticollision device for rear of truck - Google Patents

Abstract

The invention discloses an anti-collision device for the tail of a truck, which comprises a collision cross bar and a pair of thread shearing energy-absorbing mechanisms installed on both sides of the tail of the truck. The thread shearing energy-absorbing mechanism includes a crank, a connecting rod, and an energy-absorbing screw. and a shear slider, the energy-absorbing screw is installed on the frame of the truck, the shear slider is sleeved on the energy-absorbing screw, the upper end of the crank is hinged to the frame, and the upper end of the connecting rod It is hinged with the shear slider, the lower end of the connecting rod is hinged with the lower end of the crank, and the collision bar is connected to the lower end of the connecting rod of a pair of threaded shearing energy-absorbing mechanisms or connected to the lower end of the crank of a pair of threaded shearing energy-absorbing mechanisms . The anti-collision device at the rear of the truck has the advantages of simple structure, convenient assembly and disassembly, stable absorption of collision energy, and prevention of rear-end cars from getting into the bottom of the truck.

Description

Truck rear anti-collision device

technical field

The invention relates to a vehicle protective device, in particular to an anti-collision device at the rear of a truck.

Background technique

At present, with the development of the economy, the number of trucks and cars has increased simultaneously, and the accident rate of cars colliding with trucks is relatively high, and because the compatibility between the two is extremely bad, the consequences of collisions are extremely serious, and the rear-end vehicles are often killed. The current anti-collision bar at the rear of the truck usually cannot effectively prevent the car from getting into the bottom of the truck, and during the collision process, due to the high rigidity of the rear of the truck, the collision energy is almost completely absorbed by the car, resulting in excessive deformation of the car, and the occupants in the car often death or serious injury.

Contents of the invention

The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a truck rear anti-collision device with simple structure, convenient disassembly and assembly, which can absorb collision energy smoothly and prevent rear-end cars from getting into the bottom of the truck.

In order to solve the problems of the technologies described above, the present invention adopts the following technical solutions:

An anti-collision device for the rear of a truck, comprising a collision bar and a pair of thread shear energy-absorbing mechanisms installed on both sides of the tail of the truck, the thread shear energy-absorbing mechanism includes a crank, a connecting rod, an energy-absorbing screw, and a shear slide The energy-absorbing screw is installed on the frame of the truck, the shear slider is sleeved on the energy-absorbing screw, the upper end of the crank is hinged with the frame, and the upper end of the connecting rod is connected with the shear slider. The block is hinged, the lower end of the connecting rod is hinged with the lower end of the crank, and the collision bar is connected to the lower end of the connecting rod of a pair of thread shearing energy-absorbing mechanisms or to the lower end of the crank of a pair of thread shearing energy-absorbing mechanisms.

Each thread shearing energy-absorbing mechanism is provided with two connecting rods, and each connecting rod lower end is provided with an anti-blocking block, and the anti-blocking block is composed of two sides and a bottom edge, and the bottom edge collides with the The cross bar is connected and fixed, the two sides are connected and fixed with the connecting rod, and the two sides are gradually inclined downward from the connecting rod to the collision cross bar.

A corrugated energy-absorbing plate is arranged on the collision cross bar.

The energy-absorbing threads on the energy-absorbing screw are trapezoidal threads, rectangular threads, zigzag threads, circular threads or triangular threads.

Compared with the prior art, the present invention has the advantages of:

In the process of collision energy absorption of the truck tail anti-collision device of the present invention, the collision bar swings downward with the crank and the connecting rod, which can prevent the rear-end car from getting into the bottom of the truck, and when the connecting rod swings downward, it will push the shear slide The thread on the block shear energy-absorbing screw absorbs the collision energy smoothly, which can greatly reduce the accident loss caused by cars colliding with trucks, and provide more effective safety protection measures for passengers and vehicles. There is an anti-blocking block at the lower end of the connecting rod. The two sides of the anti-blocking block gradually slope downward from the connecting rod to the collision bar. Play the role of preventing the car from getting into the bottom of the truck. A corrugated energy-absorbing plate is arranged on the collision cross bar, and when the collision energy is small, the collision energy can be completely absorbed through the deformation of the corrugated energy-absorbing plate. The truck tail anti-collision device of the present invention is simple in structure, easy to disassemble and assemble, can realize graded anti-collision energy absorption, has low maintenance cost, is economical and practical, and is easy to popularize.

Description of drawings

Fig. 1 is the three-dimensional structure schematic diagram of the present invention;

Fig. 2 is a schematic diagram of a split structure of the present invention;

Fig. 3 is a structural schematic view of the present invention installed at the rear of a truck.

Each label in the figure means:

1. Thread shearing energy-absorbing mechanism; 2. Collision bar; 3. Corrugated energy-absorbing plate; 4. Anti-blocking block; 5. Frame; 11. Crank; 12. Connecting rod; 13. Shearing slider; 14 , energy-absorbing screw; 41, side; 42, bottom.

Detailed ways

Fig. 1 to Fig. 3 have shown a kind of anti-collision device embodiment of truck tail of the present invention, and this anti-collision device comprises collision bar 2 and is installed in a pair of thread shearing energy-absorbing mechanism 1 on both sides of truck tail, and thread shear The cutting energy-absorbing mechanism 1 includes a crank 11, a connecting rod 12, an energy-absorbing screw 14 and a shearing slider 13. The energy-absorbing screw 14 is installed on the frame 5 of the truck, and the shearing slider 13 is sleeved on the energy-absorbing screw 14. Above, the upper end of the crank 11 is hinged with the vehicle frame 5, the upper end of the connecting rod 12 is hinged with the shear slider 13, the lower end of the connecting rod 12 is hinged with the lower end of the crank 11, and the collision bar 2 is connected to a pair of threaded shearing energy-absorbing mechanisms 1. The lower end of the rod 12 or the lower end of the crank 11 connected to a pair of thread shearing energy-absorbing mechanisms 1, in the process of collision energy absorption, the collision bar 2 swings downward with the crank 11 and the connecting rod 12, which can prevent the rear-end car from getting into the truck bottom, and the connecting rod 12 will push the shear slider 13 to cut the screw thread on the energy-absorbing screw 14 while swinging downwards, and absorb the collision energy smoothly, which can greatly reduce the accident loss of the car rear-end collision with the truck, and provide More effective security protection measures.

In this embodiment, each thread shearing energy-absorbing mechanism 1 is provided with two connecting rods 12, and each connecting rod 12 is provided with an anti-blocking block 4 at the lower end. The bottom edge 42 is connected and fixed to the collision bar 2, and the two sides 41 are connected and fixed to the connecting rod 12, and the two sides 41 are gradually inclined downward from the connecting rod 12 to the collision bar 2. When the anti-blocking block 4 is subjected to impact A downward slanting deformation is generated to guide the downward movement of the collision cross bar 2 and prevent the car from getting into the bottom of the truck. A corrugated energy-absorbing plate 3 is provided on the collision bar 2, and when the collision energy is small, the deformation of the corrugated energy-absorbing plate 3 can completely absorb the collision energy. The energy-absorbing thread on the energy-absorbing screw rod 14 is a trapezoidal thread, a rectangular thread, a zigzag thread, a circular thread or a triangular thread, and a rectangular thread is selected in this embodiment.

Working principle: When a car collides with a truck, the front bumper or body of the rear car first comes into contact with the corrugated energy-absorbing plate 3, and the corrugated energy-absorbing plate 3 is squeezed and deformed under the action of the collision force, and absorbs a small amount of energy at the same time. When the corrugated energy-absorbing plate 3 is completely deformed and there is still collision energy that has not been absorbed, the collision energy continues to be transmitted forward, causing the anti-blocking block 4 to undergo plastic deformation downward along the induced direction and absorb part of the energy. At this time, the collision bar 2 moves downward with the movable end of the anti-blocking block 4, thereby reducing the height between the collision bar 2 and the ground, and preventing the car from getting into the bottom of the truck. When the deformation of the anti-blocking block 4 reaches the maximum, the anti-blocking block 4 and the connecting rod 12 fit together. If there is still a large amount of collision energy not absorbed at this time, the crank 11 and the connecting rod 12 will be rotated downward. Simultaneously, the connecting rod 12 will push the shear slider 13 to slide forward, shear the energy-absorbing screw thread on the energy-absorbing screw rod 14, utilize the characteristic that the force of the shear screw thread is substantially a constant force, and absorb the remaining collision energy smoothly. For different car shapes, the collision energy at the time of collision can be estimated based on experience, and then according to the collision energy and the ground clearance of the crank 11, the parameters of the mechanism can be optimized so that the energy can be completely absorbed within a certain distance, thereby greatly improving The geometric compatibility and stiffness compatibility of the two vehicles in the rear-end collision protect the collision safety of personnel and vehicles.

The truck tail anti-collision device of the present invention is simple in structure, easy to disassemble and assemble, and can swing the crank back and forth according to different road conditions to increase the trafficability of the vehicle; the present invention can also realize graded anti-collision energy absorption, whether it is a slight scratch or a severe The collision safety can be improved without changing the main structure of the truck, and the maintenance cost is low, economical and practical, and easy to popularize.

The above are only preferred embodiments of the present invention, and do not limit the present invention in any form. Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Any person familiar with the art, without departing from the scope of the technical solution of the present invention, can use the technical content disclosed above to make many possible changes and modifications to the technical solution of the present invention, or modify it into an equivalent implementation of equivalent changes example. Therefore, any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention shall fall within the protection scope of the technical solution of the present invention.

Claims (3)

1. lorry afterbody anticollision device; It is characterized in that: comprise a double thread shear energy-absorbing mechanism (1) of colliding cross bar (2) and being installed in the lorry two sides of tail; Said screw thread shear energy-absorbing mechanism (1) comprises crank (11), connecting rod (12), energy-absorbing screw rod (14) and shears slide block (13); Said energy-absorbing screw rod (14) is installed on the vehicle frame (5) of said lorry; Said shearing slide block (13) is sheathed on the energy-absorbing screw rod (14), and said crank (11) upper end is hinged with vehicle frame (5), and said connecting rod (12) upper end is hinged with shearing slide block (13); Said connecting rod (12) lower end and crank (11) lower end are hinged; Said collision cross bar (2) is connected in connecting rod (12) lower end of a double thread shear energy-absorbing mechanism (1) or is connected in crank (11) lower end of a double thread shear energy-absorbing mechanism (1), is equipped with two connecting rods (12) in each screw thread shear energy-absorbing mechanism (1), and each connecting rod (12) lower end is equipped with an obstruction block (4); Said obstruction block (4) is made up of a dual-side (41) and a base (42); Said base (42) is connected fixing with said collision cross bar (2), said dual-side (41) is connected fixing with connecting rod (12), and dual-side (41) is downward-sloping gradually to collision cross bar (2) from connecting rod (12).

2. lorry afterbody anticollision device according to claim 1 is characterized in that: said collision cross bar (2) is provided with ripple energy-absorbing plate (3).

3. lorry afterbody anticollision device according to claim 1 and 2 is characterized in that: the energy-absorbing screw thread on the said energy-absorbing screw rod (14) is Acme thread, square thread, saw thread, round thread or triangle thread.

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