Impact energy absorbing protection device

Abstract

The present invention provides an impact energy absorption protection device, including an energy absorption tube, which is a high-strength, tough and fatigue-resistant alloy material, the first end of the energy absorption tube has a tube mouth, and the second end of the energy absorption tube is closed; a mounting flange, which is arranged on the first end of the energy absorption tube and is used to connect to the protected object; a guide tube, the second end of the guide tube extends from the tube mouth of the energy absorption tube into the inner cavity of the energy absorption tube; and an anti-collision plate, which is tightly connected to the first end of the guide tube. The present invention adopts an energy absorption tube made of high-strength, tough and fatigue-resistant alloy material, and absorbs the energy generated by the impact force during the collision through the tensile deformation of the energy absorption tube. Since the yield strength and elongation of the energy absorption tube are high, the length and volume of the entire device can be reduced accordingly under the premise of ensuring energy absorption, thereby effectively solving the technical problem that the crushing energy absorption device is difficult to achieve lightweight under the premise of ensuring energy absorption, which is conducive to reducing the weight of the impact energy absorption protection device.

Description

Technical Field

[0001] The invention belongs to the technical field of passive safety protection devices, and more specifically, relates to an impact energy absorption protection device. Background Art

[0002] At present, impact energy absorption protection devices mainly complete the energy absorption task through the collapse deformation of honeycomb material parts, crush tubes, etc. After the deformation is completed, the honeycomb material parts, crush tubes, etc. will be stacked to a certain height, affecting the stroke of the impact energy absorption protection device; in addition, the crush strength of the existing crush type energy absorption device (a type of impact energy absorption protection device) is generally within 35MPa, so a sufficiently large cross-sectional area is required to ensure the crushing force value and the energy absorption, however, an increase in cross-sectional area means an increase in volume, mass, cost, etc., which is not conducive to the lightweighting of the crush type energy absorption device. Summary of the invention

[0003] The object of the present invention is to provide an impact energy absorption protection device, including but not limited to solving the technical problem that a crush-type energy absorption device is difficult to achieve lightweight while ensuring energy absorption.

[0004] In order to achieve the above object, the present invention provides an impact energy absorption protection device, comprising:

[0005] The energy absorbing tube is a high-strength, toughness and fatigue-resistant alloy material. The first end of the energy absorbing tube has a tube mouth, and the second end of the energy absorbing tube is closed;

[0006] A mounting flange is disposed around the first end of the energy absorbing cylinder and is used to connect to the protected object;

[0007] a guide tube, the second end of which extends from the opening of the energy absorbing tube into the inner cavity of the energy absorbing tube; and

[0008] An anti-collision plate is tightly connected to the first end of the guide tube.

[0009] Furthermore, the energy absorbing cylinder is provided with a first limiting hole, the guide tube is provided with a second limiting hole, and the impact energy absorbing protection device further comprises:

[0010] A shear pin is inserted into the first limiting hole and the second limiting hole.

[0011] Furthermore, an end surface of the second end of the guide tube contacts an inner surface of the second end of the energy absorbing cylinder.

[0012] Furthermore, the impact energy absorption protection device also includes:

[0013] an energy absorbing element, which is accommodated in the inner cavity of the energy absorbing cylinder, wherein the end surface of the second end of the energy absorbing element contacts the inner surface of the second end of the energy absorbing cylinder; and

[0014] A partition is sandwiched between the second end of the guide tube and the first end of the energy absorbing element.

[0015] Furthermore, the partition is fixed in the inner hole of the guide tube, and the first end of the energy absorbing element extends into the inner hole of the guide tube and abuts against the partition.

[0016] Furthermore, the energy absorbing element is a porous solid material piece.

[0017] Furthermore, the impact energy absorption protection device also includes:

[0018] The elastic buffer is sandwiched between the second end of the guide tube and the second end of the energy absorbing tube.

[0019] Furthermore, the elastic buffer comprises:

[0020] A cylinder body, wherein a first end of the cylinder body has an opening, and a second end of the cylinder body abuts against a second end of the guide tube;

[0021] An end cover, sealing on the opening;

[0022] A piston rod, one end of which passes through the end cover and abuts against the second end of the energy absorbing cylinder; and

[0023] Elastic putty is filled in the inner cavity of the cylinder.

[0024] Furthermore, the elastic buffer comprises:

[0025] A cylinder body, wherein a first end of the cylinder body has an opening, and a second end of the cylinder body abuts against a second end of the guide tube;

[0026] An end cover, sealing on the opening;

[0027] A piston rod, one end of which passes through the end cover and abuts against the second end of the energy absorbing cylinder; and

[0028] The spring is sandwiched between the second end of the cylinder body and the piston portion of the piston rod.

[0029] Furthermore, the surface of the anti-collision plate is convexly provided with anti-climbing teeth or covered with an anti-slip layer.

[0030] The beneficial effect of the impact energy absorption protection device provided by the present invention is that: an energy absorption tube made of high-strength, toughness and fatigue-resistant alloy material is adopted, and the energy generated by the impact force during the collision process is absorbed by the tensile deformation of the energy absorption tube. Since the yield strength and elongation of the energy absorption tube are high, the length and volume of the entire device can be reduced accordingly while ensuring energy absorption, thereby effectively solving the technical problem that the crushing energy absorption device is difficult to achieve lightweight while ensuring energy absorption, which is beneficial to reducing the weight of the impact energy absorption protection device and enhancing the energy absorption effect of the impact energy absorption protection device. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0032] Figure 1 A three-dimensional schematic diagram of an impact energy absorption protection device provided in Embodiment 1 of the present invention;

[0033] Figure 2 This is a schematic axial cross-sectional view of the impact energy absorption protection device provided in the first embodiment of the present invention;

[0034] Figure 3 A schematic axial cross-sectional view of the impact energy absorption protection device provided in the first embodiment of the present invention after being impacted;

[0035] Figure 4 A schematic axial cross-sectional view of an impact energy absorption protection device provided in Embodiment 2 of the present invention;

[0036] Figure 5 This is a schematic axial section diagram of the impact energy absorption protection device provided in Example 3 of the present invention.

[0037] Among them, the reference numerals in the figure are:

[0038] 1—impact energy absorption protection device, 10—energy absorption cylinder, 20—mounting flange, 30—guide tube, 40—collision plate, 50—shear pin, 60—energy absorption element, 70—partition, 80—elastic buffer, 11—cylinder body, 12—reinforcement part, 13—first limiting hole, 31—second limiting hole, 32—limiting groove, 81—cylinder body, 82—end cover, 200—mounting hole, 400—anti-climbing tooth, 831—piston part, 832—rod part. DETAILED DESCRIPTION

[0039] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0040] It should be noted that when a component is referred to as being "fixed on" or "disposed on" another component, it may be directly on the other component or indirectly on the other component. When a component is referred to as being "connected to" another component, it may be directly or indirectly connected to the other component. The orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation of this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances. The terms "first", "second", etc. are only used for the purpose of convenience of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features. The term "multiple" means two or more, unless otherwise clearly and specifically defined.

[0041] The impact energy absorption protection device provided by the present invention is now described.

[0042] Embodiment 1:

[0043] See also Figures 1 to 3The impact energy absorption protection device 1 includes an energy absorption tube 10, a mounting flange 20, a guide tube 30 and an anti-collision plate 40, wherein the energy absorption tube 10 is a high-toughness fatigue-resistant alloy material, that is, the elongation of the alloy material of the energy absorption tube 10 is greater than or equal to 70%. Here, the energy absorption tube 10 is preferably made of Chang'e steel (including 0.02C:30Mn:3Al:3Si, etc.) with a yield strength of 550-1350MPa (megapascals) and an elongation of 80%-110%. The compression ratio is usually less than 70%, and the first end of the energy absorbing tube 10 has a tube mouth, and the second end of the energy absorbing tube 10 is closed; the mounting flange 20 is arranged on the first end of the energy absorbing tube 10 for connecting the protected object, that is, the mounting flange 20 can be welded to the protected object, or the mounting flange 20 can be fixed to the protected object by fasteners such as bolts penetrating through the mounting holes 200 of the mounting flange 20; the second end of the guide tube 30 extends from the tube mouth of the energy absorbing tube 10 into the inner cavity of the energy absorbing tube 10; the anti-collision plate 40 is fastened to the first end of the guide tube 30. It can be understood that the second end of the guide tube 30 can reciprocate along the inner cavity of the energy absorbing tube 10; the surface of the anti-collision plate 40 close to the first end of the guide tube 30 is perpendicular to the axis of the guide tube 30, which is conducive to increasing the area of ​​the guide tube 30 that receives the positive impact force.

[0044] Preferably, the energy absorbing cylinder 10 comprises a cylinder body 11 and a reinforcement portion 12, wherein the cylinder body 11 is connected to the reinforcement portion 12, the reinforcement portion 12 surrounds the cylinder mouth, and the wall thickness of the reinforcement portion 12 is greater than the wall thickness of the cylinder body 11, and the mounting flange 20 is sleeved on the reinforcement portion 12 and is tightly connected to the reinforcement portion 12. When the impact energy absorbing protective device 1 is impacted, the impact plate 40 is impacted first, and then the impact plate 40 pushes the guide tube 30 further into the inner cavity of the energy absorbing cylinder 10 until the second end of the guide tube 30 contacts the second end of the energy absorbing cylinder 10, as shown in FIG. Figure 3 As shown, the second end of the guide tube 30 then pushes the second end of the energy-absorbing cylinder 10 backward, thereby extending the cylinder body 11, and absorbing the energy generated by the impact force through the tensile deformation of the cylinder body 11, thereby protecting the protected object from damage. It should be further explained here that the tensile deformation of the cylinder body 11 can be divided into two stages, the first stage is the elastic deformation stage, and the second stage is the plastic deformation stage. If the energy generated by the impact force is completely absorbed in the first stage, once the external force is removed, the cylinder body 11 can be restored to its original size and does not need to be replaced during maintenance; if the energy generated by the impact force needs to be completely absorbed in the second stage, then the cylinder body 11 cannot be restored to its original size and needs to be replaced during maintenance.

[0045] The impact energy absorption protection device 1 provided by the present invention adopts an energy absorption tube 10 made of a high-strength, tough and fatigue-resistant alloy material, and absorbs the energy generated by the impact force during the collision process through the tensile deformation of the energy absorption tube 10. Since the energy absorption tube 10 has a high yield strength and a large elongation, the length and volume of the entire device can be reduced accordingly while ensuring energy absorption, thereby effectively solving the technical problem that the crushing energy absorption device is difficult to achieve lightweight while ensuring energy absorption, which is beneficial to reducing the weight of the impact energy absorption protection device 1 and enhancing the energy absorption effect of the impact energy absorption protection device 1.

[0046] For further information, see Figure 2 and Figure 3 In this embodiment, a first limiting hole 13 is provided on the energy absorbing tube 10, and a second limiting hole 31 is provided on the guide tube 30. The impact energy absorbing protection device 1 further includes a shear pin 50, which is inserted into the first limiting hole 13 and the second limiting hole 31. Specifically, the first limiting hole 13 penetrates the tube wall at the reinforcement portion 12 of the energy absorbing tube 10, and the second limiting hole 31 penetrates the tube wall of the guide tube 30. In the initial state, the first limiting hole 13 overlaps with the second limiting hole 31, and the shear pin 50 is inserted between the two, which effectively prevents the guide tube 30 from separating from the energy absorbing tube 10; when the impact energy absorbing protection device 1 is impacted and the impact force exceeds a certain threshold, the shear pin 50 is disconnected, and the second end of the guide tube 30 is further pushed into the inner cavity of the energy absorbing tube 10, thereby pushing the second end of the energy absorbing tube 10 back, and driving the tube body 11 to stretch and deform to absorb the energy generated by the impact force.

[0047] For further information, see Figure 2 In the present embodiment, the end face of the second end of the guide tube 30 contacts the inner surface of the second end of the energy absorbing cylinder 10, that is, in the initial state, the second end of the guide tube 30 has contacted the second end of the energy absorbing cylinder 10. Once the shear pin 50 is disconnected, the second end of the guide tube 30 can push the second end of the energy absorbing cylinder 10 backward, and drive the cylinder body 11 to stretch and deform to absorb the energy generated by the impact force, thereby avoiding the collision between the second end of the guide tube 30 and the second end of the energy absorbing cylinder 10 before deformation, and improving the stability of the energy absorption process.

[0048] Optionally, see Figure 1 In this embodiment, anti-climbing teeth 400 are convexly provided on the surface of the anti-collision plate 40, or the surface of the anti-collision plate 40 is covered with an anti-slip layer, that is, anti-climbing teeth 400 are convexly provided on the surface of the first end of the anti-collision plate 40 away from the guide tube 30, or the anti-slip layer is covered. This can effectively prevent the climbing phenomenon from occurring when two protected objects loaded with the impact energy absorption protection device 1 collide with each other, avoid the climbing phenomenon from weakening the energy absorption effect of the impact energy absorption protection device 1, and thus improve the protection effect of the protected objects.

[0049] Embodiment 2:

[0050] See also Figure 4 The impact energy absorption protection device provided in this embodiment is basically the same as that in the first embodiment, and the main difference is that the impact energy absorption protection device 1 also includes an energy absorption element 60 and a partition 70, wherein the energy absorption element 60 is accommodated in the inner cavity of the energy absorption cylinder 10, and the end surface of the second end of the energy absorption element 60 contacts the inner surface of the second end of the energy absorption cylinder 10, and the partition 70 is clamped between the second end of the guide tube 30 and the first end of the energy absorption element 60. Specifically, the partition 70 is blocked between the second end of the guide tube 30 and the first end of the energy absorbing element 60, and abuts against the second end of the guide tube 30 and the first end of the energy absorbing element 60, which is conducive to the guide tube 30 to uniformly transfer the impact force to the energy absorbing element 60 through the partition 70; the energy absorbing element 60 is a porous solid material, that is, the energy absorbing element 60 is made of porous solid materials such as aluminum foil honeycomb material, stainless steel foil honeycomb material, acrylic corrugated paper, foam aluminum, etc., so that the energy absorbing element 60 has the characteristics of light weight and good energy absorption effect, which is conducive to reducing the overall weight of the impact energy absorbing protection device 1; when the impact energy absorbing protection device 1 is impacted, the shear pin 50 breaks After opening, the energy absorbing cylinder 10 first undergoes elastic deformation, and absorbs the energy generated by the impact force through elastic deformation, until the impact force value reaches the crushing value of the energy absorbing element 60, the energy absorbing element 60 begins to collapse and deform, and then the energy generated by the impact force is absorbed by the elastic deformation of the energy absorbing cylinder 10 and the collapse deformation of the energy absorbing element 60, until the energy absorbing element 60 reaches the maximum compression stroke, the energy absorbing cylinder 10 then undergoes plastic deformation, and absorbs the remaining energy generated by the impact force through plastic deformation, thus eliminating the impact caused by the collision through multi-stage energy absorption, effectively increasing the energy absorption of the impact energy absorbing protection device 1 and improving the energy absorption effect of the impact energy absorbing protection device 1.

[0051] For further information, see Figure 4 In this embodiment, the partition 70 is fixedly arranged in the inner hole of the guide tube 30, and the first end of the energy absorbing element 60 extends into the inner hole of the guide tube 30 and abuts against the partition 70. Specifically, a limiting groove 32 is provided on the second end of the guide tube 30, the limiting groove 32 is connected with the inner hole of the guide tube 30, and the limiting groove 32 extends from the end surface of the second end of the guide tube 30 along the axis of the guide tube 30 to the middle of the guide tube 30, the partition 70 is accommodated in the limiting groove 32, the cross-sectional profile of the energy absorbing element 60 matches the cross-sectional profile of the limiting groove 32, and the first end of the energy absorbing element 60 extends into the limiting groove 32, and the partition 70 abuts against the groove bottom of the limiting groove 32. When the energy absorbing element 60 collapses and deforms, the energy absorbing element 60 is completely accommodated in the limiting groove 32, which effectively avoids the stacking of the energy absorbing element 60 and affects the travel between the guide tube 30 and the energy absorbing cylinder 10.

[0052] Embodiment three:

[0053] See also Figure 5 The impact energy absorption protection device provided in this embodiment is basically the same as that in the first embodiment, and the main difference is that the impact energy absorption protection device 1 further includes an elastic buffer 80, which is sandwiched between the second end of the guide tube 30 and the second end of the energy absorption tube 10. Specifically, the elastic buffer 80 can be an elastic cement buffer, a spring buffer, a hydraulic buffer, etc. When the impact energy absorption protection device 1 is impacted and the shear pin 50 is disconnected, the energy absorption tube 10 and the elastic buffer 80 undergo elastic deformation and compression deformation respectively, and the energy generated by the impact force is absorbed by the elastic deformation of the energy absorption tube 10 and the compression deformation of the elastic buffer 80 together, until the elastic buffer 80 reaches the maximum compression stroke, and the energy absorption tube 10 then undergoes plastic deformation, and absorbs the remaining energy generated by the impact force by plastic deformation, so that the impact caused by the collision is eliminated through multi-stage energy absorption, which effectively increases the energy absorption of the impact energy absorption protection device 1 and improves the energy absorption effect of the impact energy absorption protection device 1.

[0054] Optionally, in this embodiment, the elastic buffer 80 may include a cylinder body 81, an end cover 82, a piston rod, and elastic cement, wherein the first end of the cylinder body 81 has an opening, the second end of the cylinder body 81 abuts against the second end of the guide tube 30, the end cover 82 seals the opening of the cylinder body 81, one end of the rod portion 832 of the piston rod passes through the end cover 82 and abuts against the second end of the energy absorbing cylinder 10, and the elastic cement is filled in the inner cavity of the cylinder body 81. Specifically, the piston portion 831 of the piston rod is accommodated in a sealed cavity formed by the cylinder body 81 and the end cover 82, and there is a throttling gap between the piston portion 831 and the cylinder body 81, one end of the rod portion 832 of the piston rod abuts against the inner surface of the second end of the energy absorbing cylinder 10, the other end of the rod portion 832 is connected to the piston portion 831, and the elastic cement is filled between the second end of the cylinder body 81 and the piston portion 831. When the impact energy absorbing protective device 1 is impacted, the energy absorbing cylinder 10 first undergoes elastic deformation, and absorbs the energy generated by the impact force through elastic deformation. At the same time, the guide tube 30 first pushes the cylinder body 81 to move toward the second end of the energy absorbing cylinder 10, driving the second end of the cylinder body 81 and the piston part 831 to squeeze the elastic cement. At this time, the elastic cement slowly flows from the throttling gap into the space between the piston part 831 and the end cover 82, and absorbs the energy generated by the impact force through the throttling effect until the elastic cement reaches the maximum compression stroke. The energy absorbing cylinder 10 then undergoes plastic deformation, and absorbs the remaining energy generated by the impact force through plastic deformation. In this way, the impact caused by the collision is eliminated through multi-stage energy absorption, and the energy absorption of the impact energy absorbing protective device 1 is effectively increased. Of course, according to specific circumstances and needs, in other embodiments of the present invention, a spring can be used to replace the elastic cement, so that the spring is clamped between the second end of the cylinder body 81 and the piston part 831, which is not limited here.

[0055] For further information, see Figure 5 In this embodiment, the second end of the cylinder 81 extends into the inner hole of the guide tube 30. Specifically, a limiting groove 32 is provided on the second end of the guide tube 30, the limiting groove 32 is communicated with the inner hole of the guide tube 30, and the limiting groove 32 extends from the end surface of the second end of the guide tube 30 along the axis of the guide tube 30 to the middle of the guide tube 30, the cross-sectional profile of the cylinder 81 matches the cross-sectional profile of the limiting groove 32, and the second end of the cylinder 81 extends into the limiting groove 32 and abuts against the bottom of the limiting groove 32. When the elastic buffer 80 is compressed and deformed, the elastic buffer 80 is completely accommodated in the limiting groove 32, which effectively prevents the elastic buffer 80 from affecting the travel between the guide tube 30 and the energy absorbing cylinder 10.

[0056] Embodiment 4:

[0057] The impact energy absorption protection device provided in this embodiment is basically the same as that in the third embodiment, and the main difference is that the impact energy absorption protection device 1 further includes a partition 70, which is sandwiched between the second end of the guide tube 30 and the extended end of the piston rod, and the second end of the cylinder body 81 abuts against the second end of the energy absorption cylinder 10. Specifically, one end surface of the partition 70 abuts against the second end of the guide tube 30, one end of the rod portion 832 of the piston rod penetrates the end cover 82 and extends out of the cylinder body 81, and abuts against the other end surface of the partition 70, and the end surface of the second end of the cylinder body 81 contacts the inner surface of the second end of the energy absorption cylinder 10. When the impact energy absorption protection device 1 is impacted, the energy absorption cylinder 10 first undergoes elastic deformation to absorb the energy generated by the impact force through elastic deformation. At the same time, the guide tube 30 first pushes the partition plate 70 to drive the piston rod to move toward the second end of the cylinder body 81, so that the piston part 831 and the second end of the cylinder body 81 squeeze the elastic putty. At this time, the elastic putty slowly flows from the throttling gap into between the piston part 831 and the end cover 82, and absorbs part of the energy generated by the impact force through the throttling effect until the elastic putty reaches the maximum compression stroke. The energy absorption cylinder 10 then undergoes plastic deformation to absorb the remaining energy generated by the impact force through plastic deformation. In this way, the impact caused by the collision is eliminated through multi-stage energy absorption, which effectively increases the energy absorption of the impact energy absorption protection device 1 and improves the energy absorption effect of the impact energy absorption protection device 1.

[0058] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. Impact energy absorption protection device, characterized in that: include: The energy absorbing tube is a high-strength, toughness and fatigue-resistant alloy material. The first end of the energy absorbing tube has a tube mouth, and the second end of the energy absorbing tube is closed; A mounting flange is disposed around the first end of the energy absorbing cylinder and is used to connect to the protected object; A guide tube, the second end of which extends from the mouth of the energy absorbing tube into the inner cavity of the energy absorbing tube; as well as An anti-collision plate, firmly connected to the first end of the guide tube; The energy absorbing cylinder includes a cylinder body and a reinforcement part, the cylinder body is connected to the reinforcement part, the reinforcement part surrounds the cylinder mouth, and the wall thickness of the reinforcement part is greater than the wall thickness of the cylinder body, and the mounting flange is sleeved on the reinforcement part and is tightly connected to the reinforcement part; wherein, the tensile deformation of the cylinder body is divided into two stages, the first stage is the elastic deformation stage, and the second stage is the plastic deformation stage.

2. The impact energy absorption protection device according to claim 1, characterized in that: The energy absorbing cylinder is provided with a first limiting hole, the guide tube is provided with a second limiting hole, and the impact energy absorbing protection device further comprises: A shear pin is inserted into the first limiting hole and the second limiting hole.

3. The impact energy absorption protection device according to claim 2, characterized in that: The end surface of the second end of the guide tube contacts the inner surface of the second end of the energy absorbing cylinder.

4. The impact energy absorption protection device according to claim 2, characterized in that: Also includes: An energy absorbing element is accommodated in the inner cavity of the energy absorbing cylinder, and the end surface of the second end of the energy absorbing element contacts the inner surface of the second end of the energy absorbing cylinder; as well as A partition is sandwiched between the second end of the guide tube and the first end of the energy absorbing element.

5. The impact energy absorbing protection device according to claim 4, characterized in that: The partition is fixed in the inner hole of the guide tube, and the first end of the energy absorbing element extends into the inner hole of the guide tube and abuts against the partition.

6. The impact energy absorbing protection device according to claim 4, characterized in that: The energy absorbing element is a porous solid material piece.

7. The impact energy absorbing protective device according to claim 2, characterized in that: Also includes: The elastic buffer is sandwiched between the second end of the guide tube and the second end of the energy absorbing tube.

8. The impact energy absorbing protection device according to claim 7, characterized in that: The elastic buffer comprises: A cylinder body, wherein a first end of the cylinder body has an opening, and a second end of the cylinder body abuts against a second end of the guide tube; An end cover, sealing on the opening; A piston rod, one end of which passes through the end cover and abuts against the second end of the energy absorbing cylinder; and Elastic putty is filled in the inner cavity of the cylinder.

9. The impact energy absorption protection device according to claim 7, characterized in that: The elastic buffer comprises: A cylinder body, wherein a first end of the cylinder body has an opening, and a second end of the cylinder body abuts against a second end of the guide tube; An end cover, sealing on the opening; A piston rod, one end of which passes through the end cover and abuts against the second end of the energy absorbing cylinder; and The spring is sandwiched between the second end of the cylinder body and the piston portion of the piston rod.

10. The impact energy absorption protection device according to any one of claims 1 to 9, characterized in that: The surface of the anti-collision plate is convexly provided with anti-climbing teeth or covered with an anti-slip layer.

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