CN110304004A - Novel two-stage type protective fence at tail of truck - Google Patents

Abstract

The present invention discloses a novel two-stage guardrail at the rear of a truck, the structure of which includes a rubber block, a guard bar, a second ear, a support rod, a secondary coil spring, a secondary shock absorber, a frame rear crossbeam, a first ear, a third ear, a swing rod, a fourth ear, a fifth ear, a primary shock absorber, a primary coil spring, a sixth ear, a support frame, a slider, and a guide rail in a groove. The novel two-stage guardrail at the rear of a truck of the present invention improves the bracket of a general guardrail into a two-stage spring shock-absorbing bracket, which can reduce the harm caused by a rear-end collision. When the energy of the rear-end collision is small, the primary shock absorber absorbs the collision energy and limits the forward movement of the rear-end collision vehicle. When the energy of the rear-end collision is large, the secondary shock absorber starts to work and further increases the stiffness of the guardrail, effectively absorbing the collision energy while preventing the rear-end collision vehicle from drilling into the bottom of the truck frame.

Description

A new type of two-stage guardrail at the rear of trucks

technical field

The invention is a novel two-stage guardrail at the tail of a truck, which belongs to the field of truck guards

Background technique

According to the GB11567-2017GB "Protection Requirements for Side and Rear Lower Parts of Automobiles and Trailers" issued by the country, large trucks and trailers must be equipped with protective devices that meet the performance requirements on the side and rear lower parts. At present, most of the guardrails installed at the rear of large trucks or trailers are rigid structural connections. , that is, a steel frame structure is used to connect a horizontally placed rigid protective bar at the rear. In order to prevent the rear-end vehicle from entering the bottom of the frame and causing serious damage to the rear-end vehicle, the rigidity of the generally rigid protective bar is relatively large, and if the speed of the rear-end collision vehicle is slow Or when the collision energy is small, due to the high rigidity of the rigid protective bar, it will still cause more serious damage to the rear-end vehicle. Therefore, the actual requirement for the rear guardrail of the truck is: when the collision energy is small, the rigidity of the guardrail is small. And it can effectively absorb energy, mainly to protect the front structure of the rear-end collision vehicle. When the collision energy is large, the guardrail has a higher rigidity and can further absorb energy to prevent the rear-end collision vehicle from further drilling into the bottom of the truck frame. In order to better adapt to different traffic accidents, the existing rigidly connected guardrail structure is obviously difficult to solve the above problems.

Contents of the invention

The object of the present invention is to provide a novel two-stage guardrail at the rear of a truck to solve the problems raised in the above-mentioned background technology.

To achieve the above object, the present invention provides the following technical solutions:

A new two-stage guardrail at the rear of a truck, rubber block, protective bar, second lug, support rod, secondary coil spring, secondary shock absorber, frame rear beam, first lug, third lug , swing rod, fourth lug, fifth lug, first-level shock absorber, first-level coil spring, sixth lug, support frame, slider, guide rail in the groove, a new two-stage truck rear Guardrail, the guardrail is set at the rear of the frame of the truck, and the left and right sides of the rear beam of the truck frame are respectively provided with a vibration damping mechanism, and one of the vibration damping mechanisms includes the first lug welded on one side of the tail beam , the first lug and the base of the secondary shock absorber shell are connected together through a rotating pin. Through the through hole and through the first lug, a rotatable connection is formed; the rod end of the piston rod of the secondary shock absorber is connected with the second lug through a rotating pin, which also constitutes a rotatable connection. The base of the two lugs is welded or bolted to the outer end of the slider; the slider is placed in the groove provided on the outer surface of the protective bar close to the truck frame, and can slide along the front and rear directions of the guide rail in the groove; The protective bar is set along the transverse direction of the car, and is set at a certain height at the rear of the car. According to the bumper height of ordinary cars and off-road vehicles, the height of the protective bar is set between 400mm-700mm; the height of the protective bar is lower than that of the rear of the car. The crossbeam is behind it, so that the secondary shock absorber is arranged obliquely along the longitudinal direction of the vehicle; the outer side of the secondary shock absorber is covered with a secondary coil spring, and one end of the secondary coil spring is sleeved on the outer sleeve of the secondary shock absorber Above, the other end of the secondary coil spring is sleeved on the rod end of the piston rod of the secondary shock absorber; when the secondary shock absorber stretches, the distance between the outer sleeve and the piston rod changes, driving the coil spring to compress or Stretch. A fourth lug is also welded on the upper side of the protective bar. The rear beam side of the vehicle frame is also welded with an end of the support bar arranged horizontally, and the support bar stretches out to the rear of the car, and the other end bottom of the support bar is provided with a third lug, and the third lug and an end of the swing bar form a movable Rotating connection, the other end of the swing rod forms a rotatable connection with the fourth lug through the rotating pin; when the secondary shock absorber expands and contracts, the distance between the outer sleeve and the piston rod changes, driving the secondary coil spring Compression or stretching; a support frame protruding outward along the lateral direction of the vehicle body is also welded on the outer surface of the middle part of the support rod, and the fifth lug is welded on the outer surface of the support frame, and the fifth lug is connected to the shell of the primary shock absorber. The base of the body is connected together by a rotating pin. The connection method is that the shell base of the first-stage shock absorber is provided with a through hole along its radial direction, and the rotating pin passes through the through hole and passes through the fifth lug to form a Rotatable connection; the piston rod end of the primary shock absorber is connected to the sixth lug through a rotating pin, which also constitutes a rotatable connection. The sixth lug is welded to the left side of the guardrail, so that The first-level shock absorber is arranged obliquely along the longitudinal direction of the vehicle; the outer side of the first-level shock absorber is covered with a first-level coil spring, one end of the first-level coil spring is sleeved on the outer sleeve of the first-level shock absorber, and the other end of the first-level coil spring One end is sleeved on the rod end of the piston rod of the first-stage shock absorber; when the first-stage shock absorber stretches, the distance between the outer sleeve and the piston rod changes, which drives the first-stage coil spring to compress or expand, and the other shock absorber The structure of the mechanism is the same and symmetrical with respect to the center of the guardrail.

Preferably, a strip-shaped rubber block is bonded to the rear outer surface of the protective bar; the protective bar is a hollow rectangular tube or a hollow oval tube, with a straight tube in the middle, and a certain amount of space between the two ends. bending.

Preferably, the secondary shock absorber and the primary shock absorber are double-tube hydraulic shock absorbers.

The beneficial effects of the present invention are: the bracket of the general guardrail is improved into a two-stage spring damping type bracket, which can reduce the harm when the automobile rear-ends, and when the collision energy of the rear-end collision is small, the first-stage shock absorber absorbs the collision energy and Restrict the forward movement of the rear-end collision vehicle. When the rear-end collision energy is large, the secondary shock absorber starts to work and further increases the rigidity of the guardrail, effectively absorbing the collision energy and preventing the rear-end collision vehicle from drilling into the bottom of the truck frame.

Description of drawings

Fig. 1 is a structural schematic diagram of a top view of a two-stage guardrail at the rear of a novel truck;

Fig. 2 is a structural schematic diagram of a side view of a two-stage guardrail at the rear of a novel truck;

Fig. 3 is a structural schematic diagram of the front view of the connection between the second lug of the two-stage guardrail at the tail of a new truck and the groove of the guardrail;

Fig. 4 is a structural schematic diagram of a side view of the connection between the second lug of the two-stage guardrail at the tail of a new truck and the groove of the guardrail.

In the figure: rubber block 1, protective bar 2, second lug 3, support rod 4, secondary coil spring 5, secondary shock absorber 6, frame tail beam 7, first lug 8, third lug 9. Swing rod 10, fourth lug 11, fifth lug 12, primary shock absorber 13, primary coil spring 14, sixth lug 15, support frame 16, slider 17, guide rail in the groove 18

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Please refer to the two-stage guardrail at the rear of the new truck of Figures 1 to 4, the guardrail is arranged at the rear of the frame of the truck, and a damping mechanism is respectively arranged on the left and right sides of the crossbeam (7) at the rear of the frame of the truck, one of which The damping mechanism includes a first lug (8) welded on one side of the tail beam (7), and the first lug (8) is connected to the base of the shell of the secondary shock absorber (6) through a rotating pin Together, the connection mode is that the housing base of the secondary shock absorber (6) is provided with a through hole along its radial direction, and the rotating pin passes through the through hole and passes through the first lug (8) to form a rotatable Connection mode: the rod end of the piston rod of the secondary shock absorber (6) is connected to the second lug (3) through a rotating pin, which also constitutes a rotatable connection mode, and the base of the second lug (3) is connected to the sliding The outer end of the block (17) is welded or bolted; the slide block is placed in the groove provided on the outer surface of the protective bar (2) near the side of the truck frame, and can be moved along the front and rear direction of the guide rail (18) in the groove. slide;

The protective bar (2) is arranged along the transverse direction of the automobile, and is arranged at a certain height at the rear of the automobile. According to the bumper height of general cars and off-road vehicles, the height range of the protective bar (2) is set between 400mm-700mm; the protective bar (2) is lower than the rear cross beam (7) and behind it, so that the secondary shock absorber (6) is arranged obliquely along the longitudinal direction of the vehicle; the outer side of the secondary shock absorber (6) is covered with a secondary coil spring (5), one end of the secondary coil spring (5) is sleeved on the outer sleeve of the secondary shock absorber (6), and the other end of the secondary coil spring (5) is sleeved on the piston of the secondary shock absorber (6) On the rod end of the rod; when the secondary shock absorber (6) stretches, the distance between its outer sleeve and the piston rod changes, driving the coil spring (5) to compress or stretch. The upper side of the protective bar (2) is also welded with the 4th lug (11). The side of the rear beam (7) of the vehicle frame is also welded with one end of the horizontally arranged support bar (4), the support bar (4) stretches out to the rear of the car, and the third lug (9) is arranged at the bottom of the other end of the support bar (4). , the third lug (9) forms a rotatable connection with one end of the swing rod (10) through a turning pin, and the other end of the swing rod (10) forms a rotatable connection with the fourth lug (11) through a turning pin; When the secondary shock absorber (6) stretches, the distance between its outer sleeve and the piston rod changes, driving the secondary coil spring (5) to compress or stretch;

A bracing frame (16) protruding outwards along the vehicle body transverse direction is also welded on the outer surface of the middle part of the support rod (4), and the fifth lug (12) is welded on the outer surface of the bracing frame (16), and the fifth lug (12) is connected with the base of the shell of the primary shock absorber (13) through a rotating pin, and the connection method is that the shell base of the primary shock absorber (13) is provided with a through hole along its radial direction , the rotating pin passes through the through hole and passes through the fifth lug (12), forming a rotatable connection; the piston rod end of the primary shock absorber (13) and the sixth lug (15) pass through a Rotating pins are connected to form a rotatable connection. The sixth lug (15) is welded to the left side of the protective bar (2), so that the first-stage shock absorber (13) is inclined to be arranged along the longitudinal direction of the vehicle; the first-stage damper The outer side of the vibrator (13) is covered with a primary helical spring (14), and one end of the primary helical spring (14) is sleeved on the outer sleeve of the primary shock absorber (13), and the other end of the primary helical spring (14) One end is sleeved on the rod end of the piston rod of the primary shock absorber (13); when the primary shock absorber (13) stretches, the distance between the outer sleeve and the piston rod changes, driving the primary coil spring (14 ) is compressed or stretched, and the other damping mechanism has the same structure and is symmetrical with respect to the center of the guardrail. The right side of the protective bar (2) is also bonded with a strip-type rubber block (1), the protective bar (2) is a hollow rectangular tube or a hollow oval tube, the middle is a section of straight tube, and the two ends are respectively inward There is a certain bend.

The working principle of the guardrail is: when the car collides with the rear of the truck, the front bumper or engine cover of the car first collides with the rubber block (1) arranged at the rear of the truck, and the rubber block (1) first buffers, and then collides with the protective bar ( 2) Collision, the protective bar (2) moves to the front of the truck, and the moving method is to rotate together with the two swing bars (10). When the moving distance is short, it can be regarded as the second lug (3) and the slider ( 17) Move backward along the guide rail (18) in the groove together, that is, the protective bar (2) where the guide rail (18) is located moves forward, while the second lug (3) and the slider do not move; The shock absorber (6) and the secondary coil spring (5) do not work, the primary shock absorber (13) and the primary coil spring (14) connected to the guard bar (2) are compressed, and the rigidity of the guardrail is small , which is the first-level protection. When the collision energy of the rear-end vehicle is small, the first-level protection works, and the damage of the rear-end vehicle is relatively small.

When the second lug (3) moves to the maximum stroke behind the guide rail, the secondary shock absorber (6) and the secondary coil spring (5) start to compress to absorb and buffer the collision energy, so that the car decelerates and stops running. At this time, due to the intervention of the secondary shock absorber (6) and the secondary coil spring (5), the rigidity of the guardrail becomes larger, which is the second level of protection. When the collision energy of the rear-end vehicle is large, the first level of protection, The second level of protection works at the same time. At this time, the collision energy can be further absorbed, and the rear-end vehicle can be effectively restricted from entering the rear of the truck.

Since the guardrail is equipped with two levels of protection effect with different stiffnesses, the collision energy can be absorbed and buffered according to the size of the collision energy when the car collides with the rear. Compared with the general guardrail with fixed stiffness, the damage to the vehicle is reduced to the greatest extent. Protect the safety of people in the car.

Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments, or perform equivalent replacements for some of the technical features. Within the spirit and principles of the present invention, any modifications, equivalent replacements, improvements, etc., shall be included in the protection scope of the present invention.

Claims (3)

1. a kind of novel wagon tail portion two-stage type protective fence, the vehicle frame tail portion of lorry, the vehicle frame tail portion of lorry is arranged in protective fence A damper mechanism is respectively arranged in the arranged on left and right sides of crossbeam (7), and one of damper mechanism includes being arranged in tail portion crossbeam (7) one The first trunnion (8) of side welding, the first trunnion (8) and the pedestal of the shell of second level damper (6) are connected by a rotational pin It is connected together, connection type is that radially through-hole is arranged in direction at the housing base of second level damper (6), and rotational pin passes through should Through-hole simultaneously passes through the first trunnion (8), constitutes rotatable connection type；The piston rod rod end of second level damper (6) and second Ear (3) equally constitutes rotatable connection type, pedestal and sliding block (17) of the second trunnion (3) by a rotation pin connection Outer end welding or be bolted；Sliding block is placed on outside of the hollow Bumper (2) close to Truck Frame Model side of strip In the groove being arranged on face, and it can be slided along guide rail (18) front-rear direction in groove；Bumper (2) is laterally arranged along automobile, And setting has at certain altitude in automobile tail, according to the bumper height of general car and offroad vehicle, Bumper (2) Altitude range is located between 400mm-700mm；The height of Bumper (2) makes two lower than automobile tail crossbeam (7) and in its rear Grade damper (6) is obliquely installed in direction longitudinally along an automobile；Deuterostrophies spring (5), second level are cased on the outside of second level damper (6) One end cap of helical spring (5) is on the outer sleeve of second level damper (6), and another end cap of deuterostrophies spring (5) is in second level On the rod end of damper (6) piston rod；When second level damper (6) are flexible, the variation of the distance between outer sleeve and piston rod, It drives helical spring (5) compression or upholds；The upper side of Bumper (2) has also welded the 4th trunnion (11), vehicle frame tail portion crossbeam (7) side is also welded with one end of horizontally disposed support rod (4), and support rod (4) is stretched out to automobile rear, support rod (4) Third trunnion (9) are arranged in other end lower part, and one end of third trunnion (9) and swing rod (10) constitutes rotatable company by rotational pin It connects, the other end of swing rod (10) constitutes rotatable connection by rotational pin and the 4th trunnion (11)；Outside the middle part of support rod (4) It has also been welded on side along the outwardly directed support frame (16) of vehicle body transverse direction, the lateral surface welding of support frame (16) the The pedestal of five trunnions (12), the 5th trunnion (12) and the shell of level-one damper (13) is linked together by a rotational pin, Connection type is that radially through-hole is arranged in direction at the housing base of level-one damper (13), and rotational pin passes through the through-hole and wears The 5th trunnion (12) is crossed, rotatable connection type is constituted；The piston rod rod end of level-one damper (13) and the 6th trunnion (15) By a rotation pin connection, rotatable connection type, the left side weldering of the 6th trunnion (15) and Bumper (2) are equally constituted It connects, is obliquely installed level-one damper (13) direction longitudinally along an automobile；Level-one spiral bullet is cased on the outside of level-one damper (13) Spring (14), an end cap of level-one helical spring (14) on the outer sleeve of level-one damper (13), level-one helical spring (14) Another end cap is on the rod end of level-one damper (13) piston rod；When level-one damper (13) are flexible, outer sleeve and piston The variation of the distance between bar drives level-one helical spring (14) compression or upholds；The structure of another damper mechanism is identical and phase For the central symmetry of protective fence.

2. a kind of novel wagon tail portion two-stage type protective fence according to claim 1, it is characterised in that: the Bumper (2) lateral surface rearward has also bonded the rubber block (1) of a long strip type；Bumper (2) is Hollow cuboids or hollow ellipse Round tube, centre are straight-run of pipe, and there is certain bending at both ends respectively inwards.

3. a kind of novel wagon tail portion two-stage type protective fence according to claim 1, it is characterised in that: the second level vibration damping Device (6), level-one damper (13) are double-cylinder hydraulic damper.