阅读说明：本技术 一种可安全防撞的桥架式起重机 (Bridge crane capable of being safely prevented from collision ) 是由 刘建宏 于 2020-12-24 设计创作，主要内容包括：本发明公开了一种可安全防撞的桥架式起重机,包括承重横梁,所述承重横梁顶部的一端固定连接有安装壳,所述安装壳的一端活动连接有活动杆,且活动杆活动贯穿并延伸至安装壳的内部,所述活动杆远离安装壳位置的一端固定连接有阻挡块。本发明通过运行小车配合第一气囊带动阻挡块和活动杆向安装壳一端位置移动,会使得第一活动板挤压波纹管内部的空气,并带动活塞移动至第二连通孔位置时,此时波纹管内部的空气通过第二连通孔、活动管和第一连通孔冲向第一气囊和第二气囊的内部,并使得第一气囊和第二气囊瞬间膨胀产生与运行小车相抵抗地力,并对运行小车的冲击力进行削弱,从而起到防止运行小车碰撞损坏的目的。(The invention discloses a safe and anti-collision bridge crane which comprises a bearing cross beam, wherein one end of the top of the bearing cross beam is fixedly connected with an installation shell, one end of the installation shell is movably connected with a movable rod, the movable rod movably penetrates through and extends into the installation shell, and one end, far away from the installation shell, of the movable rod is fixedly connected with a blocking block. According to the invention, the running trolley is matched with the first air bag to drive the stop block and the movable rod to move towards one end of the mounting shell, so that the first movable plate extrudes air in the corrugated pipe and drives the piston to move to the position of the second communicating hole, at the moment, the air in the corrugated pipe is flushed into the first air bag and the second air bag through the second communicating hole, the movable pipe and the first communicating hole, the first air bag and the second air bag are instantaneously expanded to generate a ground force resisting the running trolley, and the impact force of the running trolley is weakened, so that the purpose of preventing the running trolley from being damaged due to collision is achieved.)

1. The utility model provides a but safe crashproof crane span structure formula, includes bearing beam (1), its characterized in that: the mounting structure is characterized in that one end of the top of the bearing cross beam (1) is fixedly connected with a mounting shell (2), one end of the mounting shell (2) is movably connected with a movable rod (3), the movable rod (3) movably penetrates through and extends to the inside of the mounting shell (2), one end of the movable rod (3) far away from the mounting shell (2) is fixedly connected with a blocking block (4), one end of the blocking block (4) far away from the position of the movable rod (3) is fixedly connected with a first air bag (5) and a second air bag (6), the middle part of the blocking block (4) corresponding to the position of the second air bag (6) is penetrated and embedded with a movable tube (7), the movable tube (7) movably penetrates through and extends to the inside of the mounting shell (2), one end of the movable tube (7) corresponding to the inside of the mounting shell (2) is fixedly connected with a first movable plate (9), and the first movable plate (9) is movably connected to the, the one end that the movable tube (7) position was kept away from to first fly leaf (9) is fixedly connected with bellows (10) and piston cylinder (11) respectively, the one end fixedly connected with baffle (26) that the first fly leaf (9) position was kept away from to bellows (10), and baffle (26) fixed connection is at the inner wall of installation shell (2), the activity of movable rod (3) runs through and extends to the both ends of installation shell (2), the inside of the corresponding movable tube (7) of first fly leaf (9) and piston cylinder (11) position has seted up second intercommunicating pore (12), the inside of piston cylinder (11) is fixed and is equipped with double-end telescopic link (14), the one end fixedly connected with piston (15) of double-end telescopic link (14), inlet port (16) have been seted up to the one end of the corresponding piston (15) position of piston cylinder (11), the one end fixedly connected with first damping spring (17) of the corresponding piston (15) position of double-end telescopic link, the one end activity that piston (15) position was kept away from in double-end telescopic link (14) runs through and extends to the outside of piston cylinder (11), venthole (19) have been seted up to the lateral wall that piston (15) one end position was kept away from in the corresponding double-end telescopic link (14) of piston cylinder (11), the sealed piece of one end fixedly connected with (18) of piston (15) position is kept away from in double-end telescopic link (14), the one end fixedly connected with sealing washer (20) of the corresponding venthole (19) position of sealed piece (18), the one end fixedly connected with second damping spring (21) of the corresponding sealed piece (18) position of double-end telescopic link (14).

2. A bridge crane capable of safe collision avoidance according to claim 1, wherein: first gasbag (5) fixed connection is in the middle part that blocks piece (4) one end, first gasbag (5) and second gasbag (6) are the loop configuration, and the diameter of first gasbag (5) is less than the diameter of second gasbag (6), block one end middle part fixedly connected with touch switch (22) that movable rod (3) position was kept away from in piece (4).

3. A bridge crane capable of safe collision avoidance according to claim 1, wherein: stop block the position of the corresponding first gasbag (5) of piece (4) and activity pipe (7) and seted up first through-hole (8), and the inside of first through-hole (8) is linked together with the inside of activity pipe (7) and first gasbag (5) respectively, the inside homogeneous phase intercommunication of piston cylinder (11), second through-hole (12), activity pipe (7) and second gasbag (6), the inside of inlet port (16) and venthole (19) is equallyd divide and is linked together with the inside of piston cylinder (11) respectively.

4. A bridge crane capable of safe collision avoidance according to claim 1, wherein: the inner wall fixedly connected with support (13) of a piston cylinder (11), and double-end telescopic link (14) fixed connection is in the middle part of support (13), the diameter of sealing washer (20) is greater than the inner wall of venthole (19), the one end fixedly connected with fourth damping spring (37) of the corresponding movable tube (7) position of installation shell (2), and fourth damping spring (37) fixed connection is in the one end that blocks corresponding movable tube (7) position of piece (4).

5. A bridge crane capable of safe collision avoidance according to claim 1, wherein: the inner wall fixedly connected with guide bar (23) of the corresponding movable rod (3) position of installation shell (2), guide way (24) have been seted up to the one end inside of the corresponding guide bar (23) position of movable rod (3), and the surface swing joint of the inner wall of guide bar (23) and guide bar (23), the one end fixedly connected with third damping spring (25) of installation shell (2) inner wall is kept away from in guide bar (23), and third damping spring (25) fixed connection is at the inner wall of guide way (24).

6. A bridge crane capable of safe collision avoidance according to claim 1, wherein: installation shell (2) middle part is rotated respectively through the bearing and is connected with first dwang (27) and second dwang (28), the surface of second dwang (28) is first gear (29) of fixedly connected with and second gear (30) respectively, the quantity of second gear (30) is two, and two second gears (30) are located the preceding side and the back side of first gear (29) respectively, the surface of first gear (29) meshes with the top of movable rod (3) mutually, the surface meshing of second gear (30) has rack (31), rack (31) are kept away from the one end of second gear (30) position and the one end activity laminating of baffle (26).

7. The bridge crane capable of being safely collision-proof as claimed in claim 6, wherein: rack (31) activity runs through and extends to the top of installation shell (2), the top fixedly connected with second fly leaf (32) of rack (31), the top fixedly connected with telescopic link (33) of second fly leaf (32), the fixed surface of telescopic link (33) is connected with reset spring (34), the top fixedly connected with set casing (35) of telescopic link (33), and second fly leaf (32) swing joint is at the inner wall of set casing (35), set casing (35) fixed connection is at the top of installation shell (2).

8. The bridge crane of claim 7, wherein: middle part fixedly connected with third gear (36) on first rotation pole (27) surface, and the bottom meshing of the surface of third gear (36) and movable rod (3), the both ends of first rotation pole (27) are run through and are extended to the both ends of installation shell (2) through the bearing activity, the both ends of the corresponding first rotation pole (27) position of installation shell (2) are equallyd divide do not fixedly connected with fixed lid (38), the tight slice billet of inner wall fixedly connected with (39) of fixed lid (38), and roll up tight slice billet (39) fixed connection on the surface of first rotation pole (27).

Technical Field

The invention relates to the field of bridge crane equipment, in particular to a safe and anti-collision bridge crane.

Background

Bridge-type cranes have as main load-bearing members the metal structure of a bridge girder. The crane completes material carrying task in a box-shaped space with fixed span by the combined motion of three working mechanisms, such as a lifting mechanism, a trolley running mechanism, a cart running mechanism and the like, and the crane is widely applied to industrial places as one of important components of special equipment, and is intensively used in places such as large shipyards, ports and the like, and the equipment is alternately operated in the using process.

However, in the prior art, the crane span structure has large volume and mass and runs on the track at a certain speed, so that the crane span structure is very easy to collide, and once collision occurs, the result is unreasonable.

Disclosure of Invention

The invention aims to provide a bridge crane capable of being safely prevented from collision so as to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: comprises a bearing beam, an installation shell is fixedly connected with one end of the top of the bearing beam, a movable rod is movably connected with one end of the installation shell, the movable rod movably penetrates through and extends into the installation shell, a blocking block is fixedly connected with one end of the movable rod far away from the installation shell, a first air bag and a second air bag are fixedly connected with one end of the blocking block far away from the movable rod, a movable pipe penetrates through and is embedded in the middle of the blocking block corresponding to the second air bag, the movable pipe movably penetrates through and extends into the installation shell, a first movable plate is fixedly connected with one end of the movable pipe corresponding to the inside of the installation shell, the first movable plate is movably connected with the inner wall of the installation shell, a corrugated pipe and a piston cylinder are respectively fixedly connected with one end of the first movable plate far away from the movable pipe, and a partition plate is fixedly connected with one end of the corrugated pipe, and the baffle is fixedly connected with the inner wall of the mounting shell, the movable rod movably penetrates and extends to two ends of the mounting shell, a second communicating hole is formed in the first movable plate corresponding to the movable pipe and the position of the piston cylinder, a double-end telescopic rod is fixedly arranged in the piston cylinder, a piston is fixedly connected to one end of the double-end telescopic rod, an air inlet hole is formed in one end of the piston cylinder corresponding to the position of the piston, a first damping spring is fixedly connected to one end of the double-end telescopic rod corresponding to the position of the piston, one end of the double-end telescopic rod far away from the position of the piston movably penetrates and extends to the outside of the piston cylinder, an air outlet hole is formed in the side wall of the piston cylinder corresponding to the position of the double-end telescopic rod far away from the position of the piston, a sealing block, and one end of the double-end telescopic rod corresponding to the position of the sealing block is fixedly connected with a second damping spring.

Preferably, first gasbag fixed connection is in the middle part of blockking piece one end, first gasbag and second gasbag are the loop configuration, and the diameter of first gasbag is less than the diameter of second gasbag, the one end middle part fixedly connected with touch switch that the movable rod position was kept away from to the piece that blocks.

Preferably, the blocking block is provided with a first communicating hole corresponding to the first air bag and the movable tube, the inside of the first communicating hole is communicated with the inside of the movable tube and the first air bag respectively, the insides of the piston cylinder, the second communicating hole, the movable tube and the second air bag are communicated with each other, and the insides of the air inlet hole and the air outlet hole are communicated with the inside of the piston cylinder respectively.

Preferably, the inner wall fixedly connected with support of a piston section of thick bamboo, and double-end telescopic link fixed connection is at the middle part of support, the diameter of sealing washer is greater than the inner wall of venthole, the one end fixedly connected with fourth damping spring of the corresponding movable tube position of installation shell, and fourth damping spring fixed connection blocks the one end of the corresponding movable tube position of piece.

Preferably, the inner wall fixedly connected with guide bar of the corresponding movable rod position of installation shell, the guide way has been seted up to the one end inside of the corresponding guide bar position of movable rod, and the surface swing joint of the inner wall of guide bar and guide bar, the one end fixedly connected with third damping spring of installation shell inner wall is kept away from to the guide bar, and third damping spring fixed connection is at the inner wall of guide way.

Preferably, installation shell middle part is rotated respectively through the bearing and is connected with first dwang and second dwang, the first gear of surface difference fixedly connected with and second gear of second dwang, the quantity of second gear is two, and two second gears are located the preceding side and the back side of first gear respectively, the surface of first gear meshes with the top of movable rod mutually, the surface toothing of second gear has the rack, the rack is kept away from the one end of second gear position and the one end activity laminating of baffle.

Preferably, the rack activity runs through and extends to the top of installation shell, the top fixedly connected with second fly leaf of rack, the top fixedly connected with telescopic link of second fly leaf, the fixed surface of telescopic link is connected with reset spring, the top fixedly connected with set casing of telescopic link, and second fly leaf swing joint is at the inner wall of set casing, set casing fixed connection is at the top of installation shell.

Preferably, the middle part fixedly connected with third gear on first rotation pole surface, and the bottom meshing of the surface of third gear and movable rod, the both ends of first rotation pole run through and extend to the both ends of installation shell through the bearing activity, the both ends of the corresponding first rotation pole position of installation shell are equallyd divide and are do not fixedly connected with fixed lid, the tight slice billet of inner wall fixedly connected with of fixed lid, and the tight slice billet fixed connection of book is on the surface of first rotation pole.

Compared with the prior art, the invention has the beneficial effects that:

1. according to the invention, the running trolley is matched with the first air bag to drive the stop block and the movable rod to move towards one end of the mounting shell, so that the first movable plate can extrude air in the corrugated pipe and drive the piston to move to the position of the second communicating hole, at the moment, the air in the corrugated pipe is flushed into the first air bag and the second air bag through the second communicating hole, the movable pipe and the first communicating hole, the first air bag and the second air bag are instantaneously expanded to generate a ground force which is resisted with the running trolley, and the impact force of the running trolley is weakened, so that the purpose of preventing the running trolley from being damaged by collision is achieved;

2. when the running trolley leaves under the control of the control box, the air pressure in the second communicating hole, the movable pipe, the first communicating hole, the second air bag and the first air bag is higher, the air pressure in the piston cylinder drives the sealing block to move towards one end far away from the piston cylinder and stretch the second damping spring and the double-end telescopic rod, the air outlet hole is separated from the sealing ring and is in a communicating state, and therefore the air in the second communicating hole, the movable pipe, the first communicating hole, the second air bag and the first air bag can enter the corrugated pipe through the air outlet hole, and the device can be restored to an initial state after collision is finished, so that collision protection can be conducted for multiple times;

3. when the movable rod moves towards the inside of the mounting shell, the movable rod can drive the first gear to rotate, the first gear can drive the second gear to rotate, and when the second gear rotates, the second gear can drive the rack to move downwards, the rack can stretch the telescopic rod and the reset spring through the second movable plate, so that the kinetic energy of the running trolley which is collided and drives the movable rod to move is converted into the elastic potential energy of the stretching reset spring, the kinetic energy of the running trolley is consumed, the collision force of the running trolley is reduced, and the purpose of anti-collision protection is achieved;

4. when the movable rod moves towards the inside of the mounting shell, the movable rod can drive the third gear to rotate, the third gear can drive the first rotating rod to rotate, and when the first rotating rod rotates, the first rotating rod can drive the tightly-wound sheet steel bar to stretch, namely, kinetic energy generated by driving the movable rod to move when the running trolley collides is converted into elastic potential energy of the stretched tightly-wound sheet steel bar, so that the kinetic energy of the running trolley is consumed, the collision force of the running trolley is reduced, and the purpose of collision protection is achieved.

Drawings

FIG. 1 is a front sectional view of the whole bridge crane structure capable of preventing collision;

FIG. 2 is a front cross-sectional view of a bridge crane mounting shell structure with safety anticollision features of the present invention;

FIG. 3 is an enlarged view of the structure at A of FIG. 2 of the bridge crane for safety collision avoidance of the present invention;

FIG. 4 is a side cross-sectional view of a bridge crane mounting shell structure of the present invention with safety against impact;

FIG. 5 is a side view of a safety bump stop for a bridge crane according to the present invention.

In the figure: 1. a load-bearing beam; 2. mounting a shell; 3. a movable rod; 4. a blocking block; 5. a first air bag; 6. a second air bag; 7. a movable tube; 8. a first communication hole; 9. a first movable plate; 10. a bellows; 11. a piston cylinder; 12. a second communication hole; 13. a support; 14. a double-head telescopic rod; 15. a piston; 16. an air inlet; 17. a first damping spring; 18. a sealing block; 19. an air outlet; 20. a seal ring; 21. a second damping spring; 22. a touch switch; 23. a guide bar; 24. a guide groove; 25. a third damping spring; 26. a partition plate; 27. a first rotating lever; 28. a second rotating lever; 29. a first gear; 30. a second gear; 31. a rack; 32. a second movable plate; 33. a telescopic rod; 34. a return spring; 35. a stationary case; 36. a third gear; 37. a fourth damping spring; 38. a fixed cover; 39. and winding up the sheet-like steel strip.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-5, the present invention provides a technical solution: comprises a bearing beam 1, an installation shell 2 is fixedly installed at one end of the top of the bearing beam 1, a movable rod 3 is movably connected at one end of the installation shell 2, the movable rod 3 movably penetrates through and extends into the installation shell 2, a stop block 4 is fixedly installed at one end of the movable rod 3 far away from the installation shell 2, a first air bag 5 and a second air bag 6 are fixedly installed at one end of the stop block 4 far away from the position of the movable rod 3, a movable tube 7 penetrates through and is embedded in the middle of the stop block 4 corresponding to the position of the second air bag 6, the movable tube 7 movably penetrates through and extends into the installation shell 2, a first movable plate 9 is fixedly installed at one end of the movable tube 7 corresponding to the installation shell 2, the first movable plate 9 is movably connected with the inner wall of the installation shell 2, a corrugated tube 10 and a piston tube 11 are respectively fixedly installed at one end of the first movable plate 9 far away from the position of the movable tube 7, a, the partition 26 is fixedly installed on the inner wall of the installation shell 2, the movable rod 3 movably penetrates and extends to two ends of the installation shell 2, the second communicating hole 12 is formed in the position, corresponding to the movable pipe 7 and the piston cylinder 11, of the first movable plate 9, the double-end telescopic rod 14 is fixedly arranged in the piston cylinder 11, the piston 15 is fixedly installed at one end of the double-end telescopic rod 14, the air inlet hole 16 is formed in one end, corresponding to the position of the piston 15, of the piston cylinder 11, the first damping spring 17 is fixedly installed at one end, corresponding to the position of the piston 15, of the double-end telescopic rod 14, the end, away from the position of the piston 15, of the double-end telescopic rod 14 movably penetrates and extends to the outside of the piston cylinder 11, the air outlet hole 19 is formed in the side wall, away from the position, away from the piston 15, of the piston cylinder 11, corresponding to, a second damping spring 21 is fixedly arranged at one end of the double-end telescopic rod 14 corresponding to the position of the sealing block 18.

First gasbag 5 fixed mounting is in the middle part of stopping 4 one end, and first gasbag 5 and second gasbag 6 are the loop configuration, and the diameter of first gasbag 5 is less than the diameter of second gasbag 6, stops that the one end middle part fixed mounting that movable rod 3 position was kept away from to piece 4 has touch switch 22.

First communicating hole 8 has been seted up to the corresponding first gasbag 5 of stopper 4 and the position of activity pipe 7, and the inside of first communicating hole 8 is linked together with the inside of activity pipe 7 and first gasbag 5 respectively, and the inside homogeneous phase of piston cylinder 11, second communicating hole 12, activity pipe 7 and second gasbag 6 communicates, and the inside of inlet port 16 and venthole 19 is equallyd divide and is linked together with the inside of piston cylinder 11 respectively.

The inner wall fixed mounting of piston cylinder 11 has support 13, and double-end telescopic link 14 fixed mounting is in the middle part of support 13, and the diameter of sealing washer 20 is greater than the inner wall of venthole 19, and the one end fixed mounting that the corresponding movable tube 7 of installation shell 2 put has fourth damping spring 37, and fourth damping spring 37 fixed mounting is in the one end that blocks the corresponding movable tube 7 position of piece 4.

The inner wall fixed mounting that the corresponding movable rod 3 position of installation shell 2 has guide bar 23, and the one end that the corresponding guide bar 23 position of movable rod 3 was inside has seted up guide way 24, and the surface swing joint of the inner wall of guide bar 23 and guide bar 23, and the one end fixed mounting that the inner wall of installation shell 2 was kept away from to guide bar 23 has third damping spring 25, and third damping spring 25 fixed mounting is at the inner wall of guide way 24.

The middle part of the mounting shell 2 is respectively rotatably connected with a first rotating rod 27 and a second rotating rod 28 through bearings, the surface of the second rotating rod 28 is respectively and fixedly provided with a first gear 29 and a second gear 30, the number of the second gears 30 is two, the two second gears 30 are respectively positioned at the front side end and the rear side end of the first gear 29, the surface of the first gear 29 is meshed with the top of the movable rod 3, the surface of the second gear 30 is meshed with a rack 31, and one end of the rack 31, which is far away from the position of the second gear 30, is movably jointed with one end of the partition plate 26.

The rack 31 movably penetrates and extends to the top of the mounting shell 2, a second movable plate 32 is fixedly mounted at the top of the rack 31, an expansion link 33 is fixedly mounted at the top of the second movable plate 32, a return spring 34 is fixedly mounted on the surface of the expansion link 33, a fixed shell 35 is fixedly mounted at the top of the expansion link 33, the second movable plate 32 is movably connected to the inner wall of the fixed shell 35, the fixed shell 35 is fixedly mounted at the top of the mounting shell 2, when the movable rod 3 moves towards the inside of the mounting shell 2, the movable rod 3 can drive the first gear 29 to rotate, the first gear 29 can drive the second gear 30 to rotate, when the second gear 30 rotates, the second gear 30 can drive the rack 31 to move downwards, the rack 31 can stretch the expansion link 33 and the return spring 34 through the second movable plate 32, and kinetic energy for driving the movable rod 3 to move by collision of the running trolley is converted into elastic potential energy for stretching the return, therefore, the kinetic energy of the running trolley is consumed, so that the collision force of the running trolley is reduced, and the purpose of anti-collision protection is achieved.

A third gear 36 is fixedly installed in the middle of the surface of the first rotating rod 27, the surface of the third gear 36 is engaged with the bottom of the movable rod 3, two ends of the first rotating rod 27 movably penetrate through and extend to two ends of the mounting shell 2 through bearings, two ends of the mounting shell 2 corresponding to the first rotating rod 27 are respectively and fixedly installed with a fixed cover 38, the inner wall of the fixed cover 38 is fixedly installed with a rolled sheet-shaped steel bar 39, and the rolled sheet-shaped steel bar 39 is fixedly installed on the surface of the first rotating rod 27, when the movable rod 3 moves towards the inside of the mounting shell 2, the movable rod 3 drives the third gear 36 to rotate, and the third gear 36 drives the first rotating rod 27 to rotate, and when the first rotating rod 27 rotates, the first rotating rod 27 drives the rolled sheet-shaped steel bar 39 to stretch, that is, the kinetic energy of the running trolley colliding to drive the movable rod 3 to move is converted into the elastic potential energy of the stretched rolled sheet-, therefore, the kinetic energy of the running trolley is consumed, so that the collision force of the running trolley is reduced, and the purpose of anti-collision protection is achieved.

The working principle is as follows: when the running trolley moves to the position of the installation shell 2 and impacts the stop block 4, the running trolley can first impact the first air bag 5 to extrude the air in the first air bag 5 and deform and contract the first air bag 5, so that the running trolley can touch the touch switch 22, at the moment, the touch switch 22 controls the control box to stop driving control over the running trolley, the running trolley continues to impact the first air bag 5 under the action of inertia, the running trolley drives the stop block 4 and the movable rod 3 to move to one end position of the installation shell 2 through the first air bag 5, when the stop block 4 and the movable rod 3 move to one end position of the installation shell 2, the movable rod 3 and the stop block 4 can extrude the air in the corrugated pipe 10 through the movable pipe 7 and the first movable plate 9, when the air pressure in the corrugated pipe 10 increases, the air pressure in the corrugated pipe 10 can extrude the piston 15, and the double-end telescopic rod 14 and the first damping spring 17 are compressed until the piston 15 moves to the position of the second communication hole 12, at the moment, the air in the corrugated pipe 10 rushes to the inside of the first air bag 5 and the second air bag 6 through the second communication hole 12, the movable pipe 7 and the first communication hole 8, and the first air bag 5 and the second air bag 6 are instantly expanded to generate a ground force which resists against the running trolley and weaken the impact force of the running trolley, thereby achieving the purpose of preventing the running trolley from being damaged by collision, when the running trolley is controlled by the control box, at the moment, the air pressure in the second communication hole 12, the movable pipe 7, the first communication hole 8, the second air bag 6 and the first air bag 5 is larger, and the air pressure in the piston cylinder 11 drives the sealing block 18 to move to one end far away from the piston cylinder 11 and stretches the second damping spring 21 and the double-end telescopic rod 14, so that the air outlet hole 19 is separated from the sealing ring 20 and the air outlet hole 19, so that the air inside the second communication hole 12, the movable tube 7, the first communication hole 8, the second air bag 6 and the first air bag 5 can enter the inside of the corrugated tube 10 through the air outlet hole 19, thereby allowing the apparatus to be restored to the initial state after the collision is finished, so as to perform multiple collision protection.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.