CN108867478B - Buffering highway guardrail for municipal engineering - Google Patents

Abstract

The invention belongs to the technical field of guardrails, and particularly relates to a buffering highway guardrail used for municipal engineering, which comprises a first guardrail mechanism, a second guardrail mechanism and a protection plate, wherein when the protection plate is impacted by a vehicle, the protection plate can move due to impact force, the protection plate pulls a buffering belt, a winding belt pulley releases the buffering belt, and the winding belt pulley enables a first rotating shaft to rotate; the timing mechanism allows the winding pulley to release the timing belt at a relatively slow rate. The larger the impact force of the vehicle impacting the protection plate is, the farther the protection plate is impacted and moved, the more the buffer belt is wound on the belt pulley to release, and the more the consumed impact energy is, so that the function of buffering the vehicle impact is realized, and the function of protecting the vehicle and drivers and passengers can be realized. In addition, utilize first guide block spring to be compressed and absorb surplus impact energy, can not only play the effect of protection structure like this, the bigger impact of buffering vehicle that can also be better, protect driver and crew more.

Description

Buffering highway guardrail for municipal engineering

Technical Field

The invention belongs to the technical field of guardrails, and particularly relates to a buffering road guardrail used in municipal engineering.

Background

The highway guardrail that uses in the municipal works at present is an important safeguard measure in order to prevent that the vehicle from rushing out the highway behind the striking guardrail. The traditional road guardrail can be bent after being impacted by vehicles, and the bent guardrail can absorb the energy after the impact, so that the vehicles are not easily damaged by serious impact, and simultaneously, the traditional road guardrail can play a good role in protecting the vehicles and drivers. However, the conventional road guardrail cannot automatically restore to the original shape after being subjected to bending deformation after being impacted, and particularly, the front guardrail and the rear guardrail are also subjected to the bending deformation in a linkage manner after being severely impacted by a vehicle. The deformed guardrail not only causes troubles in the maintenance of the guardrail, but also influences the overall attractiveness of the highway guardrail. In order to make the road guardrail restore to an undeformed state after bending deformation, it is necessary to design a deformable road guardrail capable of absorbing impact energy.

The invention designs a bufferable road guardrail for municipal engineering to solve the problems.

Disclosure of Invention

In order to solve the defects in the prior art, the invention discloses a bufferable road guardrail for municipal engineering, which is realized by adopting the following technical scheme.

In the description of the present invention, it should be noted that the terms "inside", "below", "upper" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the present invention usually place when using, and are only used for convenience of description and simplification of description, but do not indicate or imply that the devices or elements indicated must have a specific orientation, be constructed in a specific orientation or be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

The utility model provides a bufferable highway guardrail that municipal works used which characterized in that: the guardrail protection device comprises a first guardrail mechanism, a second guardrail mechanism and a protection plate, wherein one end of the protection plate is connected with the first guardrail mechanism, and the other end of the protection plate is connected with the second guardrail mechanism; the first and second barrier mechanisms are identical in structure.

The first guardrail mechanism comprises a base, a guardrail square column, a belt guide plate, a buffer mechanism, an actuating mechanism, a square column sliding groove, a first guide groove, a limiting groove, a round hole, a first rack sliding groove, a first guide block spring, a mechanism square cavity and a belt guide through groove, wherein the square column sliding groove is formed in the upper surface of the base, and two first guide grooves are symmetrically formed in two sides of the square column sliding groove; a limit groove is formed in the side face of the base and communicated with a first guide groove; one end of the guardrail square column is arranged in the square column sliding groove in a sliding fit mode; two first guide blocks are symmetrically arranged on two side faces of one end, positioned in the square column sliding groove, of the guardrail square column; the two first guide blocks are respectively arranged in the two first guide grooves in a sliding fit manner; one end of each of the two first guide block springs is respectively arranged on the two first guide blocks, and the other end of each of the two first guide block springs is respectively arranged on the side groove surfaces of the two first guide grooves; the two first guide block springs are respectively positioned in the two first guide grooves; a first guide block is provided with a first through rack sliding groove; a first guide block with a first rack sliding groove is matched with the limiting groove; the belt guide plate is arranged on the side surface of the guardrail square column; a through belt guide through groove is formed in the belt guide plate; a mechanism square cavity is arranged in the guardrail square column; a round hole is formed in the bottom surface of the mechanism square cavity; the buffer mechanism and the actuating mechanism are both arranged in a mechanism square cavity of the guardrail square column; the buffer mechanism is matched with the actuating mechanism; the actuating mechanism is matched with a first guide block with a first rack sliding groove; the actuating mechanism is matched with the limiting groove on the base.

The executing mechanism comprises a change gear, a limiting rack, a fixed block, a second guide block spring, a second rack sliding groove and a second guide groove, wherein the change gear is arranged on the bottom surface of the mechanism square cavity through a shaft; the fixed block is fixedly arranged on the bottom surface of the mechanism square cavity and is close to the first guide block with the first rack sliding groove; a through second rack sliding groove is formed in the fixed block; two second guide grooves are symmetrically formed in two sides of the second rack sliding groove; the limiting rack is arranged in a second rack sliding groove of the fixed block in a sliding fit manner; one end of the limiting rack penetrates through the fixing block to be meshed with the turning gear, and the other end of the limiting rack penetrates through the guardrail square column and the first rack sliding groove of the first guide block; two second guide blocks are symmetrically arranged on two sides of the limiting rack; the two second guide blocks are arranged in the two second guide grooves in a sliding fit manner; one end of each second guide block spring is respectively arranged on the two second guide blocks, and the other end of each second guide block spring is respectively arranged on the side groove surfaces of the two second guide grooves; the two second guide block springs are respectively positioned in the two second guide grooves; one end of a limiting rack which passes through the first rack sliding groove of the first guide block is matched with the limiting groove on the base; the change gear is matched with the buffer mechanism.

The buffer mechanism comprises a speed regulating mechanism, a buffer belt, a winding belt pulley, a fixed cylinder, a first rotating shaft, a first volute spring, a round hole, a bottom disc, a driving gear, a second rotating shaft, a first telescopic rod, a supporting ring sleeve, a first supporting plate, a threaded ring sleeve and a second supporting plate, wherein the fixed cylinder is arranged on the top surface of a mechanism square cavity; a circular hole is formed in the bottom surface of the fixed cylinder; one end of the first rotating shaft is arranged in a circular hole at the bottom of the fixed cylinder through a bearing, and the other end of the first rotating shaft is provided with a first telescopic rod; the first scroll spring is nested on the first rotating shaft, one end of the first scroll spring is arranged on the outer circular surface of the first rotating shaft, and the other end of the first scroll spring is arranged on the inner cylindrical surface of the fixed cylinder; the winding belt pulley is fixedly arranged on the outer circular surface of the first rotating shaft and is positioned on the lower side of the fixed cylinder; one end of the buffer belt is arranged on the winding belt pulley in a winding mode, and the other end of the buffer belt penetrates through the guardrail square column and the belt guide through groove of the belt guide plate; the speed regulating mechanism is arranged between two side surfaces of the mechanism square cavity and is positioned below the thread ring sleeve; the first telescopic rod consists of a telescopic outer sleeve and a telescopic inner rod; the telescopic outer sleeve is connected with the first rotating shaft; the supporting ring sleeve is nested on the outer circular surface of the telescopic outer sleeve; the supporting ring sleeves are arranged on two side surfaces of the mechanism square cavity through two symmetrical first supporting plates; one end of the telescopic inner rod, which is far away from the telescopic outer sleeve, is connected with the speed regulating mechanism; the outer circle surface of the telescopic inner rod is provided with an external thread; the threaded ring sleeve is nested on the outer circular surface of the telescopic inner rod; the thread ring sleeves are arranged on two side surfaces of the mechanism square cavity through two symmetrical second supporting plates; the threaded ring sleeve is positioned on the speed regulating mechanism; the inner circular surface of the threaded ring sleeve is provided with internal threads; the internal thread of the thread ring sleeve is matched with the external thread of the telescopic inner rod; the second rotating shaft is arranged on the bottom surface of the mechanism square cavity through a shaft sleeve; a bottom disc is arranged at one end of the second rotating shaft, which is far away from the bottom surface of the mechanism square cavity; the bottom disc is connected with a speed regulating mechanism; the driving gear is arranged on the second rotating shaft, and the second gear is positioned below the bottom disc.

The speed regulating mechanism comprises a driving ring sleeve, a U-shaped block, an arc-shaped swing plate, a swing block, a speed regulating conical ring, a pin, a supporting conical ring, a supporting block, a second telescopic rod and a telescopic rod spring, wherein the driving ring sleeve is fixedly arranged on one end, far away from the telescopic outer sleeve, of the telescopic inner rod in the first telescopic rod; two second telescopic rods are symmetrically arranged on the outer circular surface of the driving ring sleeve; one ends of the two second telescopic rods, which are far away from the driving ring sleeve, are provided with a U-shaped block; the two telescopic rod springs are respectively nested on the two second telescopic rods, one ends of the two telescopic rod springs are arranged on the outer circular surface of the driving ring sleeve, and the other ends of the two telescopic rod springs are respectively arranged on the two U-shaped blocks; one end of each of the two swinging blocks is respectively arranged in the two U-shaped blocks through pins; one ends of the two swing blocks, which are far away from the pin, are provided with arc-shaped swing plates; the arc swing plate consists of a smooth arc plate and a friction arc plate; the supporting conical rings are arranged on two side surfaces of the mechanism square cavity through two symmetrical supporting blocks; the speed regulation conical ring is arranged in the supporting conical ring in a rotating matching way; the arc swing plate is matched with the inner annular surface of the speed regulation conical ring.

The outer circular surface of the bottom disc is fixedly connected with the inner circular surface at the lower end of the speed regulation conical ring.

The outer cambered surface of the smooth cambered plate is a smooth surface; the outer cambered surface of the friction cambered plate is a friction surface; the smooth surface of the smooth arc-shaped plate is matched with the inner ring surface of the speed regulating conical ring; the friction surface of the friction arc-shaped plate is matched with the inner annular surface of the speed regulation conical ring.

The driving gear is meshed with the direction changing gear.

One end of the protection plate is installed at one end of the first guardrail mechanism, where the buffering belt penetrates out of the belt guide plate, and the other end of the protection plate is installed at one end of the second guardrail mechanism, where the buffering belt penetrates out of the belt guide plate.

As a further improvement of the present technology, the above-mentioned guard plate has elasticity. Therefore, when the protection plate is impacted, the protection plate can generate certain elastic deformation to buffer certain impact energy; in addition, the elastic protection plate also prevents the phenomenon that the original shape cannot be recovered after the rigid impact, and is favorable for the repeated use of the protection plate.

As a further improvement of the technology, one end of the limiting rack matched with the limiting groove is provided with a round angle. The design is convenient for the limiting rack to enter and exit the limiting groove on the base.

As a further improvement of the technology, the winding pulley is wound with a plurality of turns of the buffer belt. Just so can guarantee to twine the belt pulley and cushion when external impact through releasing the buffering belt, the buffering belt has sufficient release space, but also can guarantee buffer gear's whole function.

As a further improvement of the technology, the telescopic rod spring is a compression spring; when the second telescopic rod does not rotate and the telescopic rod spring is not compressed, the outer arc surface in the middle of the arc-shaped swinging plate is in contact with the inner annular surface of the speed regulation conical ring.

As a further improvement of the present technology, the second guide spring is a compression spring; when the second guide block spring is not compressed, one end of the limiting rack with the round angle is positioned in the limiting groove of the base.

After the protection plate receives external impact force, the protection plate can move along the direction of the impact force, and meanwhile, the buffer belt wound on the winding belt wheel can be released by the movement of the protection plate to buffer the external impact force.

For the buffer mechanism: in the process of releasing the buffer belt by winding the belt pulley, the first rotating shaft is driven to rotate by the winding belt pulley. The first scroll spring functions as: firstly, when the winding belt pulley releases the buffer belt, the winding belt pulley drives the first rotating shaft to rotate so that the first scroll spring is compressed; secondly, after the winding belt pulley releases the buffering belt, under the reset action of the volute spiral spring, the first rotating shaft rotates reversely, the first rotating shaft drives the winding belt pulley to rotate reversely, and the winding belt pulley winds the released buffering belt again. The internal thread of screw thread ring cover and the outer screw thread matched with effect of flexible interior pole are: firstly, when a belt pulley is wound to release a buffer belt, a first rotating shaft rotates anticlockwise, the first rotating shaft drives a first telescopic rod to rotate anticlockwise, a telescopic inner rod also rotates anticlockwise, and the telescopic inner rod moves towards a direction far away from a telescopic outer sleeve under the thread matching effect of an internal thread of a thread ring sleeve and an external thread of the telescopic inner rod; and secondly, when the belt wheel is wound to wind the buffer belt, the first rotating shaft rotates clockwise, the first telescopic rod is driven by the first rotating shaft to rotate clockwise, the telescopic inner rod also rotates clockwise, and the telescopic inner rod moves towards the telescopic outer sleeve under the thread matching effect of the internal thread of the thread ring sleeve and the external thread of the telescopic inner rod.

The speed regulation conical ring drives the second rotating shaft to rotate through the bottom disc, the second rotating shaft drives the driving gear to rotate, and the driving gear drives the turning gear to rotate.

For the actuator: drive gear meshes with the change gear mutually, and spacing rack and change gear mesh's effect is: firstly, when the bottom disc does not drive the driving gear to rotate by the second rotating shaft, the driving gear does not drive the direction-changing gear to rotate, and when the second guide block spring is uncompressed, one end of the limiting rack with a round angle is positioned in the limiting groove of the base, so that the base limits the limiting rack, and the guardrail square column and the first guide block cannot move; secondly, when the bottom disc drives the driving gear to rotate through the second rotating shaft, the driving gear drives the change gear to rotate clockwise, the change gear drives the limiting rack to be separated from the limiting groove of the base, the second guide block moves along with the limiting rack, and the second guide block spring is compressed, so that the base cannot limit the limiting rack, and the guardrail square column and the first guide block can move; thirdly, under the reset action of the second guide block spring, the second guide block drives the limiting rack to be inserted into the limiting groove of the base again.

When the speed regulation conical ring rotates, the speed regulation conical ring needs to overcome a certain friction force provided by the support conical ring; in addition, the rotating speed-regulating conical ring can drive the limiting rack to be separated from the limiting groove through the bottom disc, the second rotating shaft, the driving gear and the change gear, and the second guide block spring can be compressed in the process, so that the resistance of the second guide block spring is also required to be overcome when the speed-regulating conical ring rotates; in summary, the rotation of the speed adjusting taper ring needs to overcome the resistance torque provided by the supporting taper ring and the second guide block spring.

For the speed regulating mechanism: the first rotating shaft drives the first telescopic rod to rotate, the telescopic inner rod in the first telescopic rod drives the second telescopic rod to rotate through the driving ring sleeve, and the second telescopic rod drives the U-shaped block, the swinging block and the arc swinging plate to rotate. A hinge point is formed by the U-shaped block, the pin and the swinging block, and the swinging block can swing around the hinge point. The outer cambered surface of the smooth cambered plate is a smooth surface; the outer cambered surface of the friction cambered plate is a friction surface; the smooth surface of the smooth arc-shaped plate is matched with the inner ring surface of the speed regulating conical ring; the friction surface of the friction arc plate and the inner ring surface of the speed regulation conical ring are matched to act as follows: first, when the second telescopic rod is not rotated and the telescopic rod spring is not compressed, the outer arc surface in the middle of the arc-shaped swinging plate is contacted with the inner annular surface of the speed regulation conical ring. The second, when the second telescopic link is clockwise rotatory, the second telescopic link lasts for a clockwise power of dialling for U type piece, so the pendulum piece is around the pin joint to the anticlockwise swing, and smooth arc in the arc pendulum plate contacts with the interior anchor ring of speed governing awl type ring, because the extrados of smooth arc is the smooth surface, so the arc pendulum plate does not receive the resistance basically when clockwise turning, has guaranteed first pivot and first telescopic link ability clockwise fast revolution. Third, when second telescopic link counter-clockwise turning, because the second telescopic link lasts for giving the anticlockwise power of dialling of U type piece, so the piece of putting swings to the swing of clockwise around the pin joint, the friction arc in the arc pendulum board contacts with the interior anchor ring of speed governing awl type ring, because the extrados of friction arc is the friction surface, so the resistance is great when the arc pendulum board clockwise turning, second telescopic link counter-clockwise turning speed is slower for first pivot and first telescopic link are with slower speed clockwise turning.

For the rotation conditions of the speed regulation conical ring: firstly, when a telescopic inner rod in a first telescopic rod moves in a rotating mode to a direction far away from a telescopic outer sleeve, the telescopic inner rod drives a second telescopic inner rod to rotate anticlockwise through a driving ring sleeve, a friction arc plate in an arc swing plate is contacted with an inner ring surface of a speed regulation conical ring, and resistance is large when the arc swing plate rotates clockwise; and because flexible interior pole removes to the direction of keeping away from flexible overcoat, lead to arc swinging plate, pendulum piece, U type piece, second telescopic link, telescopic link spring and drive ring cover to the bottom removal of speed governing awl type ring, second telescopic link and telescopic link spring can be compressed, and the pressure between arc swinging plate and the interior anchor ring of speed governing awl type ring can increase like this. Secondly, because just beginning to be sliding friction between the interior anchor ring of friction arc and speed governing taper type ring in the arc swing board, and the pressure ratio between arc swing board and the interior anchor ring of speed governing taper type ring is less, so when friction arc just begins to rotate with the interior anchor ring friction of speed governing taper type ring in the arc swing board, the friction arc can not drive the rotation of speed governing taper type ring in the arc swing board. Third, when second telescopic link and telescopic link spring compressed to the certain degree, pressure between the interior anchor ring of arc swing plate and speed governing awl type ring can increase to the certain degree, the unable speed governing awl type ring of friction arc is rotatory again in the arc swing plate, and the drive moment of torsion that the speed governing awl type ring was offered to the friction arc in the arc swing plate this moment is greater than the moment of torsion that hinders when speed governing awl type ring needs to rotate, so the phenomenon that the friction arc drove speed governing awl type ring rotation in the arc swing plate can appear, also be exactly first pivot through first telescopic link, the drive axle sleeve, the second telescopic link, U type piece, the friction arc in swing block and the arc swing plate drives speed governing awl type ring rotation.

For guardrail square column, first guide block and first guide block spring: after first guide block and guardrail square column are no longer spacing by spacing rack, when the surplus impact energy still is great appearing, guardrail square column and first guide block move along the square column sliding tray direction, and first guide block spring is compressed, and the first guide block spring of this moment compressed can cushion surplus impact energy. After external striking, under the restoring force of first guide block spring, first guide block drives the guardrail square column and removes and restore to the throne. The first guide block spring has the characteristic of being not easy to compress, so that the first guide block spring is compressed to buffer more energy.

The belt guide plate has the advantages that the belt guide plate can release the buffer belt along a certain direction mainly in the process of releasing the buffer belt, so that the buffer belt can be better guided and released after the protection plate is impacted.

The bases of the first guardrail mechanism and the second guardrail mechanism are fixedly arranged on the roadbed of the highway. The guardrail is integrated by the first guardrail mechanism, the second guardrail mechanism and the protection plate, and the two sides of the highway can combine a plurality of guardrails integrally to form a complete guardrail body in a mode of abutting against and being arranged side by side in sequence so as to prevent accidental collision of vehicles.

For a guardrail whole body, when a protection plate between a first guardrail mechanism and a second guardrail mechanism is not impacted by a vehicle, one end of the protection plate is vertical to a guardrail square column, and a plurality of circles of buffer belts are wound on a winding belt pulley; when the second telescopic rod does not rotate and the spring of the telescopic rod is not compressed, the outer arc surface in the middle of the arc-shaped swinging plate is contacted with the inner annular surface of the speed-regulating conical ring; the second guide block spring is uncompressed, and the end of the limiting rack with the round angle is located in the limiting groove of the base, so that the base limits the limiting rack, and the guardrail square column and the first guide block cannot move.

When the guard plate between first guardrail mechanism and the second guardrail mechanism receives the vehicle impact, the guard plate can be along the direction motion of striking force, and the motion of guard plate can make the buffering belt who twines on the winding belt pulley release simultaneously. When the winding pulley releases the buffer belt, the winding pulley rotates the first rotating shaft so that the first scroll spring is compressed. In the process of winding the belt pulley to release the buffer belt and drive the first rotating shaft to rotate, the first rotating shaft drives the first telescopic rod to rotate, the telescopic inner rod in the first telescopic rod drives the second telescopic rod to rotate through the driving ring sleeve, and the second telescopic rod rotates anticlockwise at the moment. When the second telescopic link counter-clockwise turning, because the second telescopic link lasts for a counter-clockwise power of dialling for U type piece, so the pendulum piece is around the pin joint to the swing of clockwise, and the friction arc in the arc pendulum board contacts with the interior anchor ring of speed governing awl type ring, because the extrados of friction arc is the friction surface, so the resistance is great when the arc pendulum board clockwise turning, and the counter-clockwise turning speed of second telescopic link is slower for first pivot and first telescopic link are with slower speed clockwise turning. The design limits the speed of the first rotating shaft driven by the winding belt pulley to rotate, and further limits that the winding belt pulley can only release the buffer belt at a slower speed; the design of the slow release buffer belt can consume a lot of impact energy, so that the impact of an external vehicle can be buffered conveniently. In addition, in the process of releasing the buffer belt by winding the belt pulley, the first scroll spring is continuously compressed, and the larger the compression amount of the first scroll spring is, the harder the first scroll spring is to be compressed, so that the compression of the first scroll spring can also cause certain resistance to the rotation of the first rotating shaft, and the speed of releasing the buffer belt by winding the belt pulley can be reduced to a certain extent.

At the in-process of winding belt pulley release buffering belt, first pivot anticlockwise rotation, first telescopic link anticlockwise rotation is driven to first pivot, and the interior pole of stretching out and drawing back is also anticlockwise rotation, so under the screw-thread fit effect of the internal thread of screw thread ring cover and the external screw thread of the interior pole of stretching out and drawing back, the interior pole of stretching out and drawing back removes to the direction of keeping away from flexible overcoat. When the telescopic inner rod in the first telescopic rod moves in a rotating mode to a direction far away from the telescopic outer sleeve, the telescopic inner rod drives the second telescopic inner rod to rotate anticlockwise through the driving ring sleeve, the friction arc plate in the arc swing plate is contacted with the inner ring surface of the speed regulation conical ring, and the resistance is large when the arc swing plate rotates clockwise; and because flexible interior pole removes to the direction of keeping away from flexible overcoat, lead to arc swinging plate, pendulum piece, U type piece, second telescopic link, telescopic link spring and drive ring cover to the bottom removal of speed governing awl type ring, second telescopic link and telescopic link spring can be compressed, and the pressure between arc swinging plate and the interior anchor ring of speed governing awl type ring can increase like this. Because sliding friction is formed between the friction arc plate in the arc-shaped swing plate and the inner annular surface of the speed regulation conical ring at the beginning, and the pressure ratio between the arc-shaped swing plate and the inner annular surface of the speed regulation conical ring is smaller, when the friction arc plate in the arc-shaped swing plate just begins to rotate in a friction manner with the inner annular surface of the speed regulation conical ring, the friction arc plate in the arc-shaped swing plate cannot drive the speed regulation conical ring to rotate.

When the protective plate between the first guardrail mechanism and the second guardrail mechanism is subjected to larger vehicle impact force, more buffer belts are released by winding the belt pulley, and more impact energy is consumed; the design makes the vehicle impact force to the protection plate larger, the protection plate is moved by the impact distance farther, the more the buffer belt released by the winding belt wheel is, and the more the consumed impact energy is, so that the function of buffering the vehicle impact is realized, and the function of protecting the vehicle and drivers and passengers can be realized.

When the guard plate between first guardrail mechanism and the second guardrail mechanism receives the vehicle impact too big, the guard plate has been far enough by the distance that the striking removed, and the guard plate removes the effect of coming the too big impact of buffering the vehicle again and has been not good, needs pass through the slip of guardrail square column and first guide block this moment, makes first guide block spring compressed and cushions surplus impact energy, also can play the effect of certain first guardrail mechanism of protection, second guardrail mechanism and guard plate like this.

The flow of the first guide block spring compressed to buffer the residual impact energy: because the moment of torsion that hinders that support cone type ring and second guide spring provided need overcome during the rotation of speed governing cone type ring just can rotate, so just beginning to drive the rotatory in-process of first telescopic link at first pivot, flexible interior pole in the first telescopic link is rotatory through drive ring cover, second telescopic link, U type piece, the interior anchor ring face that the friction arc in the pendulum block drove the arc swing plate and is laminating speed governing cone type ring is rotatory, the arc swing plate in the arc swing plate this moment can not drive speed governing cone type ring rotation. When the protection plate is moved to a relatively far distance by impact, the winding belt pulley still releases the buffer belt to enable the first rotating shaft to rotate, the first volute spiral spring is continuously compressed, and the pressure between the arc-shaped swing plate and the inner annular surface of the speed regulation conical ring is gradually increased. When second telescopic link and telescopic link spring compressed to the certain degree, pressure between the interior anchor ring of arc swing plate and speed governing awl type ring can increase to the certain degree, it is rotatory that the unable speed governing awl type ring of friction arc in the arc swing plate is again, and the drive moment of torsion that the friction arc offered speed governing awl type ring in the arc swing plate this moment is greater than speed governing awl type ring and hinders the moment of torsion when needing to rotate, so can appear in the arc swing plate friction arc drive the rotatory phenomenon of speed governing awl type ring, also be first pivot through first telescopic link, the drive axle sleeve, the second telescopic link, U type piece, the friction arc in pendulum block and the arc swing plate drives speed governing awl type ring rotatory, speed governing awl type ring drives the end disc rotation. In the process that the bottom disc drives the driving gear to rotate through the second rotating shaft, the driving gear drives the change gear to rotate clockwise, the change gear drives the limiting rack to be separated from the limiting groove of the base, the second guide block moves along with the limiting rack, the second guide block spring is compressed, the base cannot limit the limiting rack, and then the guardrail square column and the first guide block can move. Under the action of the rest impact energy, the guard plate pulls the guardrail square column through the buffer belt, the winding belt pulley and the first rotating shaft, and the guardrail square column can be pulled also through the first rotating shaft, the first telescopic rod, the driving ring sleeve, the second telescopic rod, the U-shaped block, the swinging block, the arc swinging plate, the speed regulation conical ring, the bottom disc and the second rotating shaft; then the guardrail square column in first guardrail mechanism and the second guardrail mechanism slides along the direction of the striking force along square column sliding tray, and first guide block follows the motion of guardrail square column, and first guide block spring is compressed. Because the first guide block spring has the characteristic of difficult compression, the first guide block spring is compressed to buffer the residual impact energy. Utilize first guide block spring to be compressed like this and absorb the design of surplus striking energy, can not only play the effect of certain first guardrail mechanism of protection, second guardrail mechanism and guard plate, the bigger impact that can also better buffering vehicle has protected vehicle and driver and crew more.

After the collision is finished and the vehicle is moved away, the protection plate is not influenced by the collision force any more, so that under the reset force of the first scroll spring, the first rotating shaft rotates reversely, the first rotating shaft drives the winding belt pulley to rotate reversely, and the winding belt pulley is wound on the buffer belt. In the process of the reverse rotation of the first rotating shaft, the first rotating shaft rotates clockwise at the moment; the first rotating shaft drives the second telescopic rod to rotate clockwise through a telescopic inner rod and a driving ring sleeve in the first telescopic rod; when the second telescopic link is clockwise rotatory, the second telescopic link lasts for a clockwise power of dialling for U type piece, so the pendulum piece is around the pin joint to the anticlockwise swing, and smooth arc in the arc pendulum plate contacts with the interior anchor ring of speed governing awl type ring, because the extrados of smooth arc is the smooth surface, so the arc pendulum plate does not receive the resistance basically when clockwise turning, has guaranteed that first pivot and first telescopic link can clockwise fast revolution. In addition, because first pivot drives first telescopic link clockwise rotation, the interior pole of stretching out and drawing back also clockwise rotation, so under the screw-thread fit effect of the internal thread of screw thread ring cover and the external screw thread of the interior pole of stretching out and drawing back, the interior pole of stretching out and drawing back removes to the direction of flexible overcoat, like this arc swinging plate, the swinging block, U type piece, the second telescopic link, telescopic link spring and drive ring cover remove to the bottom of keeping away from speed governing awl type ring, under the restoring force of telescopic link spring, telescopic link and U type piece remove to the direction of keeping away from drive ring cover, the pressure between arc swinging plate and the interior anchor ring of speed governing awl type ring can reduce. Finally, the smooth arc-shaped plate of the arc-shaped swing plate and the inner ring surface of the speed regulation conical ring rotate with smaller friction, and the pressure between the smooth arc-shaped plate of the arc-shaped swing plate and the inner ring surface of the speed regulation conical ring can be reduced, so that in the process of the smooth arc-shaped plate of the arc-shaped swing plate and the inner ring surface of the speed regulation conical ring rotating with smaller friction, the smooth arc-shaped plate of the arc-shaped swing plate can not drive the speed regulation conical ring to rotate.

Because first pivot can clockwise fast revolution, first pivot can fast counter-rotation promptly for the winding belt pulley can twine buffering belt fast. In the process that the buffer belt can be quickly wound by the winding belt pulley, the first guide block drives the guardrail square column to move and reset under the reset action of the first guide block spring. Due to the reset action of the second guide block spring, the second guide block drives the limiting rack to move towards the limiting groove of the base, and finally, one end, with a round corner, of the limiting rack can enter the limiting groove of the base again. The restoring force of the second guide block spring is enough to enable the second guide block to move through the limiting rack, and the turning gear and the driving gear cannot cause excessive barrier effect on the movement of the limiting rack.

Compared with the traditional guardrail technology, the highway guardrail of the invention comprises the following components: when a protection plate between the first guardrail mechanism and the second guardrail mechanism is impacted by a vehicle, the protection plate can move due to the impact force, the buffer belt is pulled by the protection plate, the buffer belt is released by winding the belt pulley, and the first rotating shaft is rotated by winding the belt pulley; the speed regulating mechanism enables the winding pulley to release the buffering belt at a relatively slow speed, so that the impact of the vehicle is buffered. The more the buffer belt is released by winding the pulley, the more the impact energy is consumed; the design makes the vehicle impact force to the protection plate larger, the protection plate is moved by the impact distance farther, the more the buffer belt released by the winding belt wheel is, and the more the consumed impact energy is, so that the function of buffering the vehicle impact is realized, and the function of protecting the vehicle and drivers and passengers can be realized. In addition, the limit rack relieves the limit of the guardrail square column and the first guide block, and the first guide block spring can be compressed to absorb the residual impact energy, so that the effect of protecting the first guardrail mechanism, the second guardrail mechanism and the protection plate can be achieved to a certain extent, the larger impact force of the vehicle can be buffered better, and the vehicle and drivers and conductors are protected more. Generally speaking, the road guardrail can buffer the vehicle impact in a certain range, and protect the vehicle and the driver and passengers in a certain range. The invention has simple structure and better function of protecting the vehicle and the driver and passengers.

Drawings

Figure 1 is an overall schematic view of a road barrier.

Fig. 2 is an overall sectional view of the road barrier.

Fig. 3 is a schematic illustration of fender installation.

Figure 4 is a schematic cross-sectional view of the first barrier mechanism.

Fig. 5 is a schematic cross-sectional view of a base.

Fig. 6 is a sectional view of the first guide block.

Fig. 7 is a sectional top view of the spacing rack.

Fig. 8 is a partially enlarged schematic view of fig. 7.

Fig. 9 is a perspective schematic view of a belt guide plate.

FIG. 10 is a sectional top view of the installation of the damping belt.

FIG. 11 is a schematic view of the engagement of the limiting rack and the direction changing gear.

Fig. 12 is a schematic sectional view of a fixed block.

Fig. 13 is a schematic front view of the damper mechanism installation.

FIG. 14 is a schematic view of a wrap pulley installation.

Fig. 15 is a sectional view of the first rotating shaft mounted to the fixed cylinder.

FIG. 16 is a schematic view of the first wrap spring installation.

Figure 17 is a schematic cross-sectional view of the drive ring sleeve installation.

Figure 18 is a schematic bottom disk installation section.

Fig. 19 is an overall schematic diagram of the governor mechanism.

Fig. 20 is a schematic front view of the entire section of the governor mechanism.

Fig. 21 is a schematic view of the U-block installation.

Fig. 22 is a schematic view of an arcuate wobble plate installation.

Number designation in the figures: 1. a first guardrail mechanism; 2. a second guardrail mechanism; 3. a protection plate; 4. a base; 5. a guardrail square column; 6. a belt guide plate; 7. a buffer mechanism; 8. a speed regulating mechanism; 9. an actuator; 10. a square column sliding groove; 12. a first guide groove; 13. a limiting groove; 14. a circular hole; 15. a first rack sliding groove; 16. a first guide block; 17. a first guide spring; 18. a mechanism square cavity; 19. a belt guide through groove; 20. a buffer belt; 21. winding a belt pulley; 22. a fixed cylinder; 23. a first rotating shaft; 26. a first scroll spring; 33. a drive ring sleeve; 35. a U-shaped block; 36. an arc-shaped swinging plate; 37. swinging a block; 40. a smooth arc plate; 41. a friction arc plate; 42. a pin; 43. a change gear; 44. a limit rack; 45. a fixed block; 46. a second guide block; 47. a second guide spring; 48. a second rack sliding groove; 49. a second guide groove; 50. round corners; 55. a bottom disc; 56. a drive gear; 57. a second rotating shaft; 58. a first telescopic rod; 59. a telescopic outer sleeve; 60. a telescopic inner rod; 61. a support ring sleeve; 62. a first support plate; 63. a threaded ring sleeve; 64. a second support plate; 70. a speed regulation conical ring; 71. supporting the conical ring; 72. a support block; 73. a second telescopic rod; 74. a telescopic rod spring.

Detailed Description

As shown in fig. 1 and 2, the guardrail device comprises a first guardrail mechanism 1, a second guardrail mechanism 2 and a protection plate 3, wherein one end of the protection plate 3 is connected with the first guardrail mechanism 1, and the other end is connected with the second guardrail mechanism 2; the first and second barrier mechanisms 1 and 2 are identical in structure.

As shown in fig. 4, 6, and 13, the first guard rail mechanism 1 includes a base 4, a guard rail square column 5, a belt guide plate 6, a buffer mechanism 7, an actuator 9, a square column sliding groove 10, a first guide groove 12, a limiting groove 13, a circular hole 14, a first rack sliding groove 15, a first guide block 16, a first guide block spring 17, a mechanism square cavity 18, and a belt guide through groove 19, as shown in fig. 5, wherein the upper surface of the base 4 is provided with the square column sliding groove 10, and two sides of the square column sliding groove 10 are symmetrically provided with two first guide grooves 12; a limit groove 13 is formed in the side face of the base 4, and the limit groove 13 is communicated with a first guide groove 12; as shown in fig. 5, 6 and 7, one end of the guardrail square column 5 is arranged in the square column sliding groove 10 in a sliding fit manner; two first guide blocks 16 are symmetrically arranged on two side faces of one end, positioned in the square column sliding groove 10, of the guardrail square column 5; the two first guide blocks 16 are respectively arranged in the two first guide grooves 12 in a sliding fit manner; one end of each of the two first guide block springs 17 is mounted on each of the two first guide blocks 16, and the other end is mounted on the side groove surfaces of the two first guide grooves 12; the two first guide block springs 17 are respectively positioned in the two first guide grooves 12; a first guide block 16 is provided with a first through rack sliding groove 15; a first guide block 16 with a first rack sliding groove 15 is matched with the limiting groove 13; as shown in fig. 4 and 9, the belt guide plate 6 is installed on the side surface of the guardrail square post 5; a through belt guide through groove 19 is formed in the belt guide plate 6; as shown in fig. 6, the guardrail square column 5 is provided with a mechanism square cavity 18 therein; a round hole 14 is arranged on the bottom surface of the mechanism square cavity 18; as shown in fig. 4 and 13, the buffer mechanism 7 and the actuator 9 are both arranged in the mechanism square cavity 18 of the guardrail square column 5; the buffer mechanism 7 is matched with the actuating mechanism 9; the actuator 9 is matched with a first guide block 16 with a first rack sliding groove 15; the actuator 9 cooperates with a stop groove 13 on the base 4.

As shown in fig. 8, 11 and 12, the actuator 9 includes a direction-changing gear 43, a limit rack 44, a fixed block 45, a second guide block 46, a second guide block spring 47, a second rack sliding groove 48 and a second guide groove 49, as shown in fig. 11 and 18, wherein the direction-changing gear 43 is mounted on the bottom surface of the mechanism square cavity 18 through a shaft; the fixed block 45 is fixedly installed on the bottom surface of the mechanism square cavity 18, as shown in fig. 8, and the fixed block 45 is close to the first guide block 16 with the first rack sliding groove 15; as shown in fig. 12, a second rack sliding groove 48 is formed in the fixed block 45; two second guide grooves 49 are symmetrically formed on both sides of the second rack sliding groove 48; as shown in fig. 8, 11 and 12, the limit rack 44 is installed in the second rack sliding groove 48 of the fixed block 45 in a sliding fit manner; one end of the limiting rack 44 penetrates through the fixing block 45 to be meshed with the direction changing gear 43, and the other end of the limiting rack 44 penetrates through the guardrail square column 5 and the first rack sliding groove 15 of the first guide block 16; two second guide blocks 46 are symmetrically arranged on two sides of the limiting rack 44; the two second guide blocks 46 are installed in the two second guide grooves 49 in a sliding fit manner; one end of each of the two second guide block springs 47 is mounted on each of the two second guide blocks 46, and the other end is mounted on the side groove surface of each of the two second guide grooves 49; the two second guide block springs 47 are respectively positioned in the two second guide grooves 49; one end of the limit rack 44 passing through the first rack sliding groove 15 of the first guide block 16 is matched with the limit groove 13 on the base 4; the direction-changing gear 43 is engaged with the damper mechanism 7.

As shown in fig. 4, 10, 13 and 14, the above-mentioned buffer mechanism 7 includes a speed adjusting mechanism 8, a buffer belt 20, a winding pulley 21, a fixed cylinder 22, a first rotating shaft 23, a first spiral spring 26, a circular hole 14, a bottom disc 55, a driving gear 56, a second rotating shaft 57, a first telescopic rod 58, a supporting ring sleeve 61, a first supporting plate 62, a threaded ring sleeve 63 and a second supporting plate 64, as shown in fig. 13, wherein the fixed cylinder 22 is mounted on the top surface of the mechanism square cavity 18; as shown in fig. 16, the cylinder bottom surface of the fixed cylinder 22 is provided with a circular hole 14; as shown in fig. 14 and 15, one end of the first rotating shaft 23 is mounted in the circular hole 14 at the bottom of the fixed cylinder 22 through a bearing, and the other end is mounted with a first telescopic rod 58; as shown in fig. 14, 15 and 16, the first spiral spring 26 is nested on the first rotating shaft 23, one end of the first spiral spring 26 is installed on the outer circumferential surface of the first rotating shaft 23, and the other end is installed on the inner cylindrical surface of the fixed cylinder 22; as shown in fig. 13 and 14, the winding pulley 21 is fixedly mounted on the outer circumferential surface of the first rotating shaft 23, and the winding pulley 21 is located on the lower side of the fixed cylinder 22; as shown in fig. 3, 4 and 10, one end of the buffer belt 20 is installed on the winding pulley 21 in a winding manner, and the other end passes through the belt guiding through groove 19 of the guardrail square column 5 and the belt guiding plate 6; as shown in fig. 4 and 13, the speed regulating mechanism 8 is installed between two side surfaces of the mechanism square cavity 18, and the speed regulating mechanism 8 is positioned below the thread ring sleeve 63; the first telescopic rod 58 is composed of a telescopic outer sleeve 59 and a telescopic inner rod 60; the telescopic jacket 59 is connected with the first rotating shaft 23; as shown in fig. 13 and 17, the support ring 61 is nested on the outer circumferential surface of the telescopic outer sleeve 59; the supporting ring sleeves 61 are arranged on two sides of the mechanism square cavity 18 through two symmetrical first supporting plates 62; one end of the telescopic inner rod 60 far away from the telescopic outer sleeve 59 is connected with the speed regulating mechanism 8; the outer circular surface of the telescopic inner rod 60 is provided with an external thread; as shown in fig. 13 and 17, the threaded collar 63 is nested on the outer circumferential surface of the telescopic inner rod 60; the thread ring sleeves 63 are arranged on two side surfaces of the mechanism square cavity 18 through two symmetrical second supporting plates 64; the thread ring sleeve 63 is positioned on the speed regulating mechanism 8; the inner circular surface of the threaded ring sleeve 63 is provided with internal threads; the internal thread of the thread ring sleeve 63 is matched with the external thread of the telescopic inner rod 60; as shown in fig. 11, 13 and 18, the second rotating shaft 57 is mounted on the bottom surface of the mechanism square cavity 18 through a bushing; a bottom disc 55 is arranged at one end of the second rotating shaft 57 far away from the bottom surface of the mechanism square cavity 18; the bottom disc 55 is connected with the speed regulating mechanism 8; the drive gear 56 is mounted on a second shaft 57 and the second gear is located below the bottom disc 55.

As shown in fig. 19 and 20, the speed adjusting mechanism 8 includes a driving ring sleeve 33, a U-shaped block 35, an arc-shaped swing plate 36, a swing block 37, a speed adjusting conical ring 70, a pin 42, a supporting conical ring 71, a supporting block 72, a second telescopic rod 73, and a telescopic rod spring 74, as shown in fig. 17, wherein the driving ring sleeve 33 is fixedly installed on one end of the telescopic inner rod 60 of the first telescopic rod 58 away from the telescopic outer sleeve 59; as shown in fig. 17 and 19, two second telescopic rods 73 are symmetrically installed on the outer circumferential surface of the driving ring sleeve 33; as shown in fig. 20 and 21, a U-shaped block 35 is mounted at one end of each of the two second telescopic rods 73 away from the driving ring sleeve 33; the two telescopic rod springs 74 are respectively nested on the two second telescopic rods 73, one end of each of the two telescopic rod springs 74 is arranged on the outer circular surface of the driving ring sleeve 33, and the other end of each of the two telescopic rod springs 74 is arranged on the two U-shaped blocks 35; as shown in fig. 19, 20 and 22, one end of each of the two swing blocks 37 is mounted in each of the two U-shaped blocks 35 via a pin 42; one ends of the two swing blocks 37 far away from the pin 42 are respectively provided with an arc swing plate 36; as shown in fig. 22, the arcuate swing plate 36 is composed of a smooth arcuate plate 40 and a friction arcuate plate 41; as shown in fig. 13, 18 and 19, the support cone rings 71 are mounted on both sides of the mechanism square chamber 18 by two symmetrical support blocks 72; the speed regulation conical ring 70 is installed in the support conical ring 71 in a rotating fit mode; as shown in fig. 19, the arcuate wobble plate 36 engages the inner annular surface of the speed cone ring 70.

As shown in fig. 18, the outer circumferential surface of the bottom disk 55 is fixedly connected to the inner circumferential surface of the lower end of the speed control cone 70.

As shown in fig. 22, the outer arc surface of the smooth arc plate 40 is a smooth surface; the outer arc surface of the friction arc plate 41 is a friction surface; as shown in fig. 19 and 20, the smooth surface of the smooth arc plate 40 is matched with the inner annular surface of the speed regulating cone-shaped ring 70; the friction surface of the friction arc plate 41 is matched with the inner annular surface of the speed regulation conical ring 70.

As shown in fig. 8 and 11, the drive gear 56 meshes with the direction changing gear 43.

As shown in fig. 1 and 3, one end of the guard plate is installed at one end of the first guard rail mechanism 1 where the buffering belt 20 penetrates out of the belt guide plate 6, and the other end of the guard plate is installed at one end of the second guard rail mechanism 2 where the buffering belt 20 penetrates out of the belt guide plate 6.

The protection plate 3 has elasticity. Therefore, when the protection plate 3 is impacted, the protection plate 3 can generate certain elastic deformation to buffer certain impact energy; in addition, the elastic protection plate 3 also prevents the phenomenon that the original shape cannot be recovered after the rigid impact, and is favorable for the repeated use of the protection plate 3.

As shown in fig. 11, the end of the limit rack 44 that is engaged with the limit groove 13 has a rounded corner 50. This is designed to facilitate the movement of the limit rack 44 into and out of the limit groove 13 of the base 4.

The winding pulley 21 is wound with a plurality of buffer belts 20. Thus, it is ensured that the buffer belt 20 has a sufficient release space when the wind-up pulley 21 buffers the external impact by releasing the buffer belt 20, and the overall operation of the buffer mechanism 7 can be ensured.

As shown in fig. 19 and 20, the telescopic rod spring 74 is a compression spring; when the second telescopic rod 73 is not rotated and the telescopic rod spring 74 is not compressed, the outer arc surface at the middle of the arc-shaped swing plate 36 is in contact with the inner annular surface of the speed regulation cone ring 70.

As shown in fig. 7 and 8, the second guide spring 47 is a compression spring; when the second guide spring 47 is uncompressed, one end of the stopper rack 44 having the rounded corner 50 is located in the stopper groove 13 of the base 4.

When the protection plate 3 in the present invention receives an external impact, the protection plate 3 moves in the direction of the impact, and the movement of the protection plate 3 releases the buffer belt 20 wound around the winding pulley 21 to buffer the external impact.

For the damper mechanism 7: in the process of releasing the buffer belt 20 from the wind-up pulley 21, the wind-up pulley 21 rotates the first rotating shaft 23. The first scroll spring 26 functions to: first, when the wind pulley 21 releases the buffering belt 20, the wind pulley 21 rotates the first rotating shaft 23 such that the first spiral spring 26 is compressed; secondly, after the buffer belt 20 is released from the winding pulley 21, the first rotating shaft 23 rotates in the opposite direction under the restoring action of the spiral spring, the first rotating shaft 23 drives the winding pulley 21 to rotate in the opposite direction, and the winding pulley 21 winds the released buffer belt 20 again. The internal thread of the thread ring sleeve 63 and the external thread of the telescopic inner rod 60 are matched with each other: firstly, when the belt pulley 21 is wound to release the buffer belt 20, the first rotating shaft 23 rotates counterclockwise, the first rotating shaft 23 drives the first telescopic rod 58 to rotate counterclockwise, and the telescopic inner rod 60 also rotates counterclockwise, so that under the thread matching action of the internal thread of the thread ring sleeve 63 and the external thread of the telescopic inner rod 60, the telescopic inner rod 60 moves away from the telescopic outer sleeve 59; secondly, when the winding belt pulley 21 is wound around the buffer belt 20, the first rotating shaft 23 rotates clockwise, the first rotating shaft 23 drives the first telescopic rod 58 to rotate clockwise, the telescopic inner rod 60 also rotates clockwise, and then the telescopic inner rod 60 moves towards the telescopic outer sleeve 59 under the thread matching effect of the internal thread of the thread ring sleeve 63 and the external thread of the telescopic inner rod 60.

The speed-regulating conical ring 70 drives the second rotating shaft 57 to rotate through the bottom disc 55, the second rotating shaft 57 drives the driving gear 56 to rotate, and the driving gear 56 drives the change gear 43 to rotate.

For the actuator 9: the driving gear 56 is meshed with the direction-changing gear 43, and the limiting rack 44 is meshed with the direction-changing gear 43 and has the following effects: firstly, when the bottom disc 55 does not drive the driving gear 56 to rotate by the second rotating shaft 57, the driving gear 56 does not drive the direction-changing gear 43 to rotate, and at the moment, when the second guide block spring 47 is not compressed, one end of the limiting rack 44 with the round angle 50 is positioned in the limiting groove 13 of the base 4, so that the base 4 limits the limiting rack 44, and the guardrail square column 5 and the first guide block 16 cannot move; secondly, in the process that the bottom disc 55 drives the driving gear 56 to rotate through the second rotating shaft 57, the driving gear 56 drives the change gear 43 to rotate clockwise, the change gear 43 drives the limiting rack 44 to be separated from the limiting groove 13 of the base 4, the second guide block 46 moves along with the limiting rack 44, and the second guide block spring 47 is compressed, so that the base 4 cannot limit the limiting rack 44, and the guardrail square column 5 and the first guide block 16 can move; thirdly, under the reset action of the second guide spring 47, the second guide 46 drives the limit rack 44 to be inserted into the limit groove 13 of the base 4 again.

When the speed governing taper ring 70 rotates, the speed governing taper ring 70 needs to overcome a certain friction force provided by the support taper ring 71; in addition, the rotating speed-regulating conical ring 70 can drive the limiting rack 44 to be separated from the limiting groove 13 through the bottom disc 55, the second rotating shaft 57, the driving gear 56 and the change gear 43, and the second guide block spring 47 is compressed in the process, so that the resistance of the second guide block spring 47 is also required to be overcome when the speed-regulating conical ring 70 rotates; in summary, the rotation of the speed adjustment taper ring 70 requires overcoming the resistance torque provided by the support taper ring 71 and the second guide spring 47.

For the speed regulating mechanism 8: the first rotating shaft 23 drives the first telescopic rod 58 to rotate, the telescopic inner rod 60 in the first telescopic rod 58 drives the second telescopic rod 73 to rotate through the driving ring sleeve 33, and the second telescopic rod 73 drives the U-shaped block 35, the swinging block 37 and the arc swinging plate 36 to rotate. A pivot point is formed by U-shaped block 35, pin 42 and rocker 37, and rocker 37 can pivot about the pivot point. The outer arc surface of the smooth arc plate 40 is a smooth surface; the outer arc surface of the friction arc plate 41 is a friction surface; the smooth surface of the smooth arc-shaped plate 40 is matched with the inner ring surface of the speed regulating conical ring 70; the friction surface of the friction arc plate 41 and the inner annular surface of the speed regulation conical ring 70 are matched to act as follows: first, when the second extension rod 73 is not rotated and the extension rod spring 74 is not compressed, the outer arc surface at the middle of the arc swing plate 36 is in contact with the inner annular surface of the speed regulation cone ring 70. Secondly, when second telescopic link 73 clockwise turning, second telescopic link 73 continuously gives U type piece 35 a clockwise toggle force, so the pendulum block 37 swings to the counter-clockwise around the pin joint, smooth arc board 40 among the arc swinging board 36 contacts with the interior anchor ring of speed governing taper type ring 70, because the extrados of smooth arc board 40 is the smooth surface, so the arc swinging board 36 does not receive the resistance during clockwise turning basically, has guaranteed that first pivot 23 and first telescopic link 58 can clockwise fast turn. Thirdly, when the second telescopic rod 73 rotates counterclockwise, because the second telescopic rod 73 continuously gives a counterclockwise toggle force to the U-shaped block 35, the swing block 37 swings clockwise around the hinge point, the friction arc plate 41 in the arc swing plate 36 contacts with the inner annular surface of the speed regulation conical ring 70, because the outer arc surface of the friction arc plate 41 is a friction surface, the resistance is large when the arc swing plate 36 rotates clockwise, the counterclockwise rotation speed of the second telescopic rod 73 is slow, and the first rotating shaft 23 and the first telescopic rod 58 rotate clockwise at a slow speed.

For the rotation condition of the speed governing taper ring 70: firstly, in the process that the telescopic inner rod 60 in the first telescopic rod 58 moves in a rotating manner to a direction far away from the telescopic outer sleeve 59, at this time, the telescopic inner rod 60 drives the second telescopic inner rod 60 to rotate anticlockwise through the driving ring sleeve 33, the friction arc plate 41 in the arc-shaped swinging plate 36 is in contact with the inner annular surface of the speed regulation conical ring 70, and the resistance is large when the arc-shaped swinging plate 36 rotates clockwise; and because the telescopic inner rod 60 moves towards the direction far away from the telescopic outer sleeve 59, the arc-shaped swinging plate 36, the swinging block 37, the U-shaped block 35, the second telescopic rod 73, the telescopic rod spring 74 and the driving ring sleeve 33 move towards the bottom of the speed regulation conical ring 70, the second telescopic rod 73 and the telescopic rod spring 74 are compressed, and thus the pressure between the arc-shaped swinging plate 36 and the inner annular surface of the speed regulation conical ring 70 is increased. Secondly, as sliding friction is formed between the friction arc plate 41 in the arc-shaped swing plate 36 and the inner annular surface of the speed regulation cone-shaped ring 70 at the beginning, and the pressure ratio between the arc-shaped swing plate 36 and the inner annular surface of the speed regulation cone-shaped ring 70 is smaller, when the friction arc plate 41 in the arc-shaped swing plate 36 begins to rotate in a friction manner with the inner annular surface of the speed regulation cone-shaped ring 70, the friction arc plate 41 in the arc-shaped swing plate 36 cannot drive the speed regulation cone-shaped ring 70 to rotate. Thirdly, when the second telescopic rod 73 and the telescopic rod spring 74 are compressed to a certain degree, the pressure between the inner annular surfaces of the arc-shaped swinging plate 36 and the speed regulation cone-shaped ring 70 can be increased to a certain degree, the friction arc plate 41 in the arc-shaped swinging plate 36 can not rotate the speed regulation cone-shaped ring 70 any more, and the driving torque provided by the friction arc plate 41 in the arc-shaped swinging plate 36 to the speed regulation cone-shaped ring 70 is larger than the resistance torque when the speed regulation cone-shaped ring 70 needs to rotate, so that the phenomenon that the friction arc plate 41 in the arc-shaped swinging plate 36 drives the speed regulation cone-shaped ring 70 to rotate can occur, namely the first rotating shaft 23 drives the speed regulation cone-shaped ring 70 to rotate through the first telescopic rod 58, the driving shaft sleeve, the second telescopic rod 73, the U-shaped block 35, the swinging block 37.

For the guardrail square post 5, the first guide shoe 16 and the first guide shoe spring 17: after the first guide block 16 and the guardrail square column 5 are no longer limited by the limiting rack 44, when the residual impact energy is still relatively large, the guardrail square column 5 and the first guide block 16 move along the square column sliding groove 10, the first guide block spring 17 is compressed, and the compressed first guide block spring 17 can buffer the residual impact energy. After the external impact is finished, the first guide block 16 drives the guardrail square column 5 to move and reset under the reset force of the first guide block spring 17. The first guide spring 17 has a characteristic of being not easily compressed, so that the first guide spring 17 is compressed to absorb more energy.

The belt guide plate 6 of the present invention is mainly used for releasing the buffering belt 20 in a certain direction by the belt guide plate 6 in the process that the buffering belt 20 is released, so that the buffering belt 20 can be better guided and released after the protection plate 3 is impacted.

The specific implementation mode is as follows: in the invention, the bases 4 of the first guardrail mechanism 1 and the second guardrail mechanism 2 are both fixedly arranged on the roadbed of the highway. The first guardrail mechanism 1, the second guardrail mechanism 2 and the protection plate 3 form a guardrail whole, and both sides on a road can combine a plurality of guardrails together in a mode of abutting against and being sequentially arranged side by side to form a complete guardrail body so as to prevent accidental collision of vehicles.

For a guardrail whole body, when a protection plate 3 between a first guardrail mechanism 1 and a second guardrail mechanism 2 is not impacted by a vehicle, one end of the protection plate 3 is vertical to a guardrail square column 5, and a plurality of circles of buffer belts 20 are wound on a winding belt pulley 21; when the second telescopic rod 73 does not rotate and the telescopic rod spring 74 is not compressed, the outer arc surface in the middle of the arc-shaped swing plate 36 is in contact with the inner annular surface of the speed regulation conical ring 70; the second guide spring 47 is uncompressed, and one end of the limiting rack 44 with the round angle 50 is positioned in the limiting groove 13 of the base 4, so that the base 4 limits the limiting rack 44, and the guardrail square column 5 and the first guide block 16 cannot move.

When the protection plate 3 between the first guardrail mechanism 1 and the second guardrail mechanism 2 is impacted by a vehicle, the protection plate 3 moves along the direction of the impact force, and the movement of the protection plate 3 releases the buffer belt 20 wound on the winding pulley 21. When the wind-up pulley 21 releases the buffer belt 20, the wind-up pulley 21 rotates the first rotating shaft 23 such that the first scroll spring 26 is compressed, and the wind-up pulley 21 rotates counterclockwise as shown in fig. 10. In the process of winding the belt pulley 21 to release the buffering belt 20 and drive the first rotating shaft 23 to rotate, the first rotating shaft 23 drives the first telescopic rod 58 to rotate, the telescopic inner rod 60 in the first telescopic rod 58 drives the second telescopic rod 73 to rotate through the driving ring sleeve 33, and at the moment, the second telescopic rod 73 rotates counterclockwise. As shown in fig. 19, when the second telescopic rod 73 rotates counterclockwise, since the second telescopic rod 73 continuously gives a counterclockwise pulling force to the U-shaped block 35, the swing block 37 swings clockwise around the hinge point, the friction arc plate 41 in the arc swing plate 36 contacts with the inner annular surface of the speed regulation conical ring 70, since the outer arc surface of the friction arc plate 41 is a friction surface, the resistance is large when the arc swing plate 36 rotates clockwise, the counterclockwise rotation speed of the second telescopic rod 73 is slow, and the first rotating shaft 23 and the first telescopic rod 58 rotate clockwise at a slow speed. The design limits the speed of the first rotating shaft 23 driven by the winding pulley 21 to rotate, and further limits the winding pulley 21 to release the buffer belt 20 only at a slower speed; the design of the slow release bumper belt 20 may consume a lot of impact energy to facilitate the buffering of the impact of the external vehicle. In addition, in the process of releasing the buffering belt 20 by winding the pulley 21, the first spiral spring 26 is continuously compressed, and the larger the compression amount of the first spiral spring 26 is, the harder the first spiral spring 26 is to be compressed, and further the compression of the first spiral spring 26 can cause a certain resistance to the rotation of the first rotating shaft 23, and can reduce the speed of releasing the buffering belt 20 by winding the pulley 21 to a certain degree.

In the process of releasing the buffer belt 20 by winding the belt pulley 21, the first rotating shaft 23 rotates counterclockwise, the first rotating shaft 23 drives the first telescopic rod 58 to rotate counterclockwise, the telescopic inner rod 60 also rotates counterclockwise, and the telescopic inner rod 60 moves in the direction away from the telescopic outer sleeve 59 under the thread matching effect of the internal thread of the thread ring sleeve 63 and the external thread of the telescopic inner rod 60. When the telescopic inner rod 60 in the first telescopic rod 58 moves in a rotating manner in a direction away from the telescopic outer sleeve 59, at this time, the telescopic inner rod 60 drives the second telescopic inner rod 60 to rotate anticlockwise through the driving ring sleeve 33, the friction arc-shaped plate 41 in the arc-shaped swinging plate 36 is in contact with the inner annular surface of the speed regulation conical ring 70, and the resistance is large when the arc-shaped swinging plate 36 rotates clockwise; and because the telescopic inner rod 60 moves towards the direction far away from the telescopic outer sleeve 59, the arc-shaped swinging plate 36, the swinging block 37, the U-shaped block 35, the second telescopic rod 73, the telescopic rod spring 74 and the driving ring sleeve 33 move towards the bottom of the speed regulation conical ring 70, the second telescopic rod 73 and the telescopic rod spring 74 are compressed, and thus the pressure between the arc-shaped swinging plate 36 and the inner annular surface of the speed regulation conical ring 70 is increased. Since sliding friction is just started between the friction arc plate 41 in the arc swing plate 36 and the inner annular surface of the speed regulation cone-shaped ring 70, and the pressure ratio between the arc swing plate 36 and the inner annular surface of the speed regulation cone-shaped ring 70 is relatively small, when the friction arc plate 41 in the arc swing plate 36 just starts to rotate in friction with the inner annular surface of the speed regulation cone-shaped ring 70, the friction arc plate 41 in the arc swing plate 36 cannot drive the speed regulation cone-shaped ring 70 to rotate.

When the protective plate 3 between the first and second guardrail mechanisms 1 and 2 is subjected to a vehicle impact force, the more the buffer belt 20 is released by the winding pulley 21, the more impact energy is consumed; the design enables the larger the impact force of the vehicle impacting the protection plate 3 is, the longer the protection plate 3 is impacted and moved, the more the buffer belt 20 is released by winding the belt pulley 21, the more the consumed impact energy is, thereby realizing the function of buffering the vehicle impact and protecting the vehicle and the driver and passengers.

When the protection plate 3 between the first guardrail mechanism 1 and the second guardrail mechanism 2 is subjected to overlarge vehicle impact force, the distance that the protection plate 3 is moved by the impact is long enough, the effect that the protection plate 3 moves to buffer the overlarge impact force of the vehicle is not good, at the moment, the first guide block spring 17 is compressed to buffer the residual impact energy through the sliding of the guardrail square column 5 and the first guide block 16, and thus, the effect of protecting the first guardrail mechanism 1, the second guardrail mechanism 2 and the protection plate 3 to a certain extent can be achieved.

The flow of the first guide spring 17 being compressed to buffer the remaining impact energy: because the speed regulation conical ring 70 needs to overcome the resistance torque provided by the supporting conical ring 71 and the second guide block spring 47 when rotating, so that in the process that the first rotating shaft 23 just starts to drive the first telescopic rod 58 to rotate, the telescopic inner rod 60 in the first telescopic rod 58 drives the friction arc plate 41 in the arc-shaped swinging plate 36 to be attached to the inner annular surface of the speed regulation conical ring 70 to rotate through the driving ring sleeve 33, the second telescopic rod 73, the U-shaped block 35 and the swinging block 37, and the friction arc plate 41 in the arc-shaped swinging plate 36 at the moment cannot drive the speed regulation conical ring 70 to rotate. When the shielding plate 3 is moved to a relatively far distance by the impact, the winding pulley 21 still releases the buffering belt 20 to rotate the first rotating shaft 23, the first scroll spring 26 continues to be compressed, and the pressure between the arc-shaped swing plate 36 and the inner annular surface of the speed-adjusting cone 70 gradually increases. When second telescopic link 73 and telescopic link spring 74 are compressed to a certain degree, pressure between the annular face in arc swing plate 36 and speed governing cone type ring 70 can increase to a certain degree, friction arc 41 can't be rotatory again speed governing cone type ring 70 in arc swing plate 36, and the drive moment of torsion that friction arc 41 provided speed governing cone type ring 70 in arc swing plate 36 at this moment is greater than the moment of resistance when speed governing cone type ring 70 needs to rotate, so the phenomenon that friction arc 41 drives speed governing cone type ring 70 rotatory in arc swing plate 36 can appear, that is, first pivot 23 is through first telescopic link 58, the drive axle sleeve, second telescopic link 73, U type piece 35, the friction arc 41 in swing block 37 and arc swing plate 36 drives speed governing cone type ring 70 rotatory, speed governing cone type ring 70 drives bottom disc 55 rotatory. As shown in fig. 8 and 11, in the process that the bottom disc 55 drives the driving gear 56 to rotate through the second rotating shaft 57, the driving gear 56 drives the direction-changing gear 43 to rotate clockwise, the direction-changing gear 43 drives the limiting rack 44 to separate from the limiting groove 13 of the base 4, the second guide block 46 moves along with the limiting rack 44, and the second guide block spring 47 is compressed, so that the base 4 cannot limit the limiting rack 44, and the guard bar square column 5 and the first guide block 16 can move. Under the action of the rest impact energy, the guard plate 3 pulls the guardrail square column 5 through the buffer belt 20, the winding belt pulley 21 and the first rotating shaft 23, and the first rotating shaft 23 can also pull the guardrail square column 5 through the first telescopic rod 58, the driving ring sleeve 33, the second telescopic rod 73, the U-shaped block 35, the swinging block 37, the arc swinging plate 36, the speed regulation conical ring 70, the bottom disc 55 and the second rotating shaft 57; the guardrail square post 5 in the first and second guardrail mechanisms 1 and 2 slides along the square post sliding groove 10 in the direction of the impact force, the first guide block 16 follows the guardrail square post 5, and the first guide block spring 17 is compressed. Since the first guide spring 17 has a characteristic of being not easily compressed, the first guide spring 17 is compressed to absorb the remaining impact energy. Utilize first guide spring 17 to be compressed to absorb remaining impact energy's design like this, can not only play the effect of certain first guardrail mechanism 1 of protection, second guardrail mechanism 2 and guard plate 3, the bigger impact of buffering vehicle that can also be better, protected vehicle and driver and crew more.

After the collision is over and the vehicle is removed, the protection plate 3 is not acted by the collision force any more, and then under the restoring force of the first scroll spring 26, the first rotating shaft 23 rotates reversely, the first rotating shaft 23 drives the winding belt pulley 21 to rotate reversely, and the winding belt pulley 21 winds the buffer belt 20. During the process of the reverse rotation of the first rotating shaft 23, the first rotating shaft 23 rotates clockwise at this time; the first rotating shaft 23 drives the second telescopic rod 73 to rotate clockwise through the telescopic inner rod 60 in the first telescopic rod 58 and the driving ring sleeve 33; as shown in fig. 19, when the second telescopic rod 73 rotates clockwise, the second telescopic rod 73 continuously gives a clockwise toggle force to the U-shaped block 35, so the swing block 37 swings counterclockwise around the hinge point, the smooth arc plate 40 in the arc swing plate 36 contacts with the inner annular surface of the speed regulation tapered ring 70, and because the outer arc surface of the smooth arc plate 40 is smooth, the arc swing plate 36 is basically free of resistance when rotating clockwise, and the first rotating shaft 23 and the first telescopic rod 58 can rotate clockwise quickly. In addition, because the first rotating shaft 23 drives the first telescopic rod 58 to rotate clockwise, and the telescopic inner rod 60 also rotates clockwise, under the screw thread matching action of the internal thread of the screw thread ring sleeve 63 and the external thread of the telescopic inner rod 60, the telescopic inner rod 60 moves towards the telescopic outer sleeve 59, so that the arc-shaped swinging plate 36, the swinging block 37, the U-shaped block 35, the second telescopic rod 73, the telescopic rod spring 74 and the driving ring sleeve 33 move towards the bottom far away from the speed regulation cone-shaped ring 70, under the reset force of the telescopic rod spring 74, the telescopic rod and the U-shaped block 35 move towards the direction far away from the driving ring sleeve 33, and the pressure between the arc-shaped swinging plate 36 and the inner ring surface of the speed regulation cone 70 is reduced. Finally, the smooth arc plate 40 of the arc swing plate 36 rotates with a smaller friction with the inner annular surface of the speed regulation cone-shaped ring 70, and the pressure between the smooth arc plate 40 of the arc swing plate 36 and the inner annular surface of the speed regulation cone-shaped ring 70 decreases, so that the smooth arc plate 40 of the arc swing plate 36 does not drive the speed regulation cone-shaped ring 70 to rotate in the process of the smooth arc plate 40 of the arc swing plate 36 and the inner annular surface of the speed regulation cone-shaped ring 70 rotating with a smaller friction.

Since the first rotating shaft 23 can be rapidly rotated clockwise, that is, the first rotating shaft 23 can be rapidly rotated reversely, the winding pulley 21 can be rapidly wound around the buffer belt 20. In the process that the winding belt pulley 21 can rapidly wind the buffer belt 20, the first guide block 16 drives the guardrail square column 5 to move and reset under the reset action of the first guide block spring 17. Due to the restoring action of the second guide spring 47, the second guide 46 drives the limit rack 44 to move toward the limit groove 13 of the base 4, and finally, the end of the limit rack 44 with the round corner 50 enters the limit groove 13 of the base 4 again. The restoring force of the second guide block spring 47 is enough to make the second guide block 46 move through the limit rack 44, and the direction change gear 43 and the driving gear 56 do not cause too much obstruction to the movement of the limit rack 44.

In conclusion, the invention has the main beneficial effects that: when the protection plate 3 between the first guardrail mechanism 1 and the second guardrail mechanism 2 is impacted by a vehicle, the impact force can make the protection plate 3 move, the protection plate 3 pulls the buffer belt 20, the winding belt pulley 21 releases the buffer belt 20, and the winding belt pulley 21 makes the first rotating shaft 23 rotate; the governor mechanism 8 allows the wind-up pulley 21 to release the damping belt 20 at a relatively slow speed, facilitating damping of the impact of the vehicle. The more the damping belt 20 is released around the pulley 21, the more the impact energy is consumed; the design enables the larger the impact force of the vehicle impacting the protection plate 3 is, the longer the protection plate 3 is impacted and moved, the more the buffer belt 20 is released by winding the belt pulley 21, the more the consumed impact energy is, thereby realizing the function of buffering the vehicle impact and protecting the vehicle and the driver and passengers. In addition, the limit rack 44 relieves the limit on the guardrail square column 5 and the first guide block 16, and the first guide block spring 17 can be compressed to absorb the residual impact energy, so that the first guardrail mechanism 1, the second guardrail mechanism 2 and the protection plate 3 can be protected to a certain extent, the larger impact force of the vehicle can be better buffered, and the vehicle and drivers and conductors are protected better. Generally speaking, the road guardrail can buffer the vehicle impact in a certain range, and protect the vehicle and the driver and passengers in a certain range. The invention has simple structure and better function of protecting the vehicle and the driver and passengers.

Claims (6)

1. The utility model provides a bufferable highway guardrail that municipal works used which characterized in that: the guardrail protection device comprises a first guardrail mechanism, a second guardrail mechanism and a protection plate, wherein one end of the protection plate is connected with the first guardrail mechanism, and the other end of the protection plate is connected with the second guardrail mechanism; the first guardrail mechanism and the second guardrail mechanism have the same structure;

the first guardrail mechanism comprises a base, a guardrail square column, a belt guide plate, a buffer mechanism, an actuating mechanism, a square column sliding groove, a first guide groove, a limiting groove, a round hole, a first rack sliding groove, a first guide block spring, a mechanism square cavity and a belt guide through groove, wherein the square column sliding groove is formed in the upper surface of the base, and two first guide grooves are symmetrically formed in two sides of the square column sliding groove; a limit groove is formed in the side face of the base and communicated with a first guide groove; one end of the guardrail square column is arranged in the square column sliding groove in a sliding fit mode; two first guide blocks are symmetrically arranged on two side faces of one end, positioned in the square column sliding groove, of the guardrail square column; the two first guide blocks are respectively arranged in the two first guide grooves in a sliding fit manner; one end of each of the two first guide block springs is respectively arranged on the two first guide blocks, and the other end of each of the two first guide block springs is respectively arranged on the side groove surfaces of the two first guide grooves; the two first guide block springs are respectively positioned in the two first guide grooves; a first guide block is provided with a first through rack sliding groove; a first guide block with a first rack sliding groove is matched with the limiting groove; the belt guide plate is arranged on the side surface of the guardrail square column; a through belt guide through groove is formed in the belt guide plate; a mechanism square cavity is arranged in the guardrail square column; a round hole is formed in the bottom surface of the mechanism square cavity; the buffer mechanism and the actuating mechanism are both arranged in a mechanism square cavity of the guardrail square column; the buffer mechanism is matched with the actuating mechanism; the actuating mechanism is matched with a first guide block with a first rack sliding groove; the actuating mechanism is matched with the limiting groove on the base;

the executing mechanism comprises a change gear, a limiting rack, a fixed block, a second guide block spring, a second rack sliding groove and a second guide groove, wherein the change gear is arranged on the bottom surface of the mechanism square cavity through a shaft; the fixed block is fixedly arranged on the bottom surface of the mechanism square cavity and is close to the first guide block with the first rack sliding groove; a through second rack sliding groove is formed in the fixed block; two second guide grooves are symmetrically formed in two sides of the second rack sliding groove; the limiting rack is arranged in a second rack sliding groove of the fixed block in a sliding fit manner; one end of the limiting rack penetrates through the fixing block to be meshed with the turning gear, and the other end of the limiting rack penetrates through the guardrail square column and the first rack sliding groove of the first guide block; two second guide blocks are symmetrically arranged on two sides of the limiting rack; the two second guide blocks are arranged in the two second guide grooves in a sliding fit manner; one end of each second guide block spring is respectively arranged on the two second guide blocks, and the other end of each second guide block spring is respectively arranged on the side groove surfaces of the two second guide grooves; the two second guide block springs are respectively positioned in the two second guide grooves; one end of a limiting rack which passes through the first rack sliding groove of the first guide block is matched with the limiting groove on the base; the change gear is matched with the buffer mechanism;

the buffer mechanism comprises a speed regulating mechanism, a buffer belt, a winding belt pulley, a fixed cylinder, a first rotating shaft, a first volute spring, a round hole, a bottom disc, a driving gear, a second rotating shaft, a first telescopic rod, a supporting ring sleeve, a first supporting plate, a threaded ring sleeve and a second supporting plate, wherein the fixed cylinder is arranged on the top surface of a mechanism square cavity; a circular hole is formed in the bottom surface of the fixed cylinder; one end of the first rotating shaft is arranged in a circular hole at the bottom of the fixed cylinder through a bearing, and the other end of the first rotating shaft is provided with a first telescopic rod; the first scroll spring is nested on the first rotating shaft, one end of the first scroll spring is arranged on the outer circular surface of the first rotating shaft, and the other end of the first scroll spring is arranged on the inner cylindrical surface of the fixed cylinder; the winding belt pulley is fixedly arranged on the outer circular surface of the first rotating shaft and is positioned on the lower side of the fixed cylinder; one end of the buffer belt is arranged on the winding belt pulley in a winding mode, and the other end of the buffer belt penetrates through the guardrail square column and the belt guide through groove of the belt guide plate; the speed regulating mechanism is arranged between two side surfaces of the mechanism square cavity and is positioned below the thread ring sleeve; the first telescopic rod consists of a telescopic outer sleeve and a telescopic inner rod; the telescopic outer sleeve is connected with the first rotating shaft; the supporting ring sleeve is nested on the outer circular surface of the telescopic outer sleeve; the supporting ring sleeves are arranged on two side surfaces of the mechanism square cavity through two symmetrical first supporting plates; one end of the telescopic inner rod, which is far away from the telescopic outer sleeve, is connected with the speed regulating mechanism; the outer circle surface of the telescopic inner rod is provided with an external thread; the threaded ring sleeve is nested on the outer circular surface of the telescopic inner rod; the thread ring sleeves are arranged on two side surfaces of the mechanism square cavity through two symmetrical second supporting plates; the threaded ring sleeve is positioned on the speed regulating mechanism; the inner circular surface of the threaded ring sleeve is provided with internal threads; the internal thread of the thread ring sleeve is matched with the external thread of the telescopic inner rod; the second rotating shaft is arranged on the bottom surface of the mechanism square cavity through a shaft sleeve; a bottom disc is arranged at one end of the second rotating shaft, which is far away from the bottom surface of the mechanism square cavity; the bottom disc is connected with a speed regulating mechanism; the driving gear is arranged on the second rotating shaft, and the second gear is positioned below the bottom disc;

the speed regulating mechanism comprises a driving ring sleeve, a U-shaped block, an arc-shaped swing plate, a swing block, a speed regulating conical ring, a pin, a supporting conical ring, a supporting block, a second telescopic rod and a telescopic rod spring, wherein the driving ring sleeve is fixedly arranged on one end, far away from the telescopic outer sleeve, of the telescopic inner rod in the first telescopic rod; two second telescopic rods are symmetrically arranged on the outer circular surface of the driving ring sleeve; one ends of the two second telescopic rods, which are far away from the driving ring sleeve, are provided with a U-shaped block; the two telescopic rod springs are respectively nested on the two second telescopic rods, one ends of the two telescopic rod springs are arranged on the outer circular surface of the driving ring sleeve, and the other ends of the two telescopic rod springs are respectively arranged on the two U-shaped blocks; one end of each of the two swinging blocks is respectively arranged in the two U-shaped blocks through pins; one ends of the two swing blocks, which are far away from the pin, are provided with arc-shaped swing plates; the arc swing plate consists of a smooth arc plate and a friction arc plate; the supporting conical rings are arranged on two side surfaces of the mechanism square cavity through two symmetrical supporting blocks; the speed regulation conical ring is arranged in the supporting conical ring in a rotating matching way; the arc swing plate is matched with the inner annular surface of the speed regulation conical ring;

the outer circular surface of the bottom disc is fixedly connected with the inner circular surface at the lower end of the speed regulation conical ring;

the outer cambered surface of the smooth cambered plate is a smooth surface; the outer cambered surface of the friction cambered plate is a friction surface; the smooth surface of the smooth arc-shaped plate is matched with the inner ring surface of the speed regulating conical ring; the friction surface of the friction arc-shaped plate is matched with the inner annular surface of the speed regulation conical ring;

the driving gear is meshed with the direction changing gear;

one end of the protection plate is installed at one end of the first guardrail mechanism, where the buffering belt penetrates out of the belt guide plate, and the other end of the protection plate is installed at one end of the second guardrail mechanism, where the buffering belt penetrates out of the belt guide plate.

2. The cushioned highway guardrail for municipal engineering use according to claim 1, wherein: the guard plate has elasticity.

3. The cushioned highway guardrail for municipal engineering use according to claim 1, wherein: the end of the limiting rack matched with the limiting groove is provided with a fillet.

4. The cushioned highway guardrail for municipal engineering use according to claim 1, wherein: the winding belt pulley is wound with a plurality of circles of buffer belts.

5. The cushioned highway guardrail for municipal engineering use according to claim 1, wherein: the telescopic rod spring is a compression spring; when the second telescopic rod does not rotate and the telescopic rod spring is not compressed, the outer arc surface in the middle of the arc-shaped swinging plate is in contact with the inner annular surface of the speed regulation conical ring.

6. The cushioned highway guardrail for municipal engineering use according to claim 1, wherein: the second guide block spring is a compression spring; when the second guide block spring is not compressed, one end of the limiting rack with the round angle is positioned in the limiting groove of the base.

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