Protective device

Abstract

The invention relates to the technical field of trailer wagon protection, in particular to a protection device which comprises a frame, a buffering assembly and a clamping assembly, the frame is provided with a channel, and the channel extends from one side of the frame to the interior of the frame; the buffer assembly is located in the channel and faces an inlet of the channel. The clamping assemblies are located on the two sides of the channel and located between the buffering assembly and an inlet of the channel. Damage caused by out-of-control of the trailer wagon can be reduced.

Description

Technical Field

[0001] The present application relates to the technical field of traction vehicle protection, and in particular to a protection device. Background Art

[0002] A car is a means of transportation for users, and it protects users through the shell of the car body.

[0003] When a car is involved, its safety performance needs to be tested. Generally, the car is towed by a trolley so that the car has enough speed to collide. The damage to the car after the collision can also reflect the level of its safety performance.

[0004] In the related art, due to the heavy load and high speed of the traction trolley, once the steel cable used to connect the car breaks, the traction trolley is prone to lose control and cause widespread damage. Summary of the invention

[0005] In view of this, the present application provides a protective device to reduce the damage caused by the loss of control of the traction vehicle.

[0006] Specifically, the following technical solutions are included:

[0007] The present application provides a protective device, which comprises a frame, a buffer assembly and a clamping assembly, wherein:

[0008] The frame has a channel extending from one side of the frame toward the interior of the frame;

[0009] The buffer assembly is located in the channel and faces the entrance of the channel;

[0010] The clamping assembly is located at both sides of the channel and between the buffer assembly and the entrance of the channel.

[0011] Optionally, the clamping assembly includes a driving part, a first clamping plate and a second clamping plate, and the driving part is respectively connected to the first clamping plate and the second clamping plate to drive the first clamping plate and the second clamping plate to move closer to and away from each other, and the first clamping plate and the second clamping plate are respectively located on opposite sides of the channel.

[0012] Optionally, the clamping assembly includes a sensing unit, which is electrically connected to the driving part, and is used to transmit a signal to the driving part when sensing that the traction trolley enters the channel, so that the driving part drives the first clamping plate and the second clamping plate to approach each other.

[0013] Optionally, the sensing unit includes a photoelectric sensor, which is located between the first clamping plate and the entrance of the channel. The driving unit includes a time delay relay, a cylinder and an air source. The photoelectric sensor is electrically connected to the time delay relay, and the time delay relay is used to receive a signal from the photoelectric sensor so that the air source drives the cylinder to move and drive the first clamping plate and the second clamping plate to approach each other.

[0014] Optionally, a gasket is provided on a side of the first clamping plate facing the second clamping plate and a side of the second clamping plate facing the first clamping plate.

[0015] Optionally, the buffer assembly includes a buffer pad, and the entrance of the channel is located within the orthographic projection of the buffer pad on the frame.

[0016] Optionally, the buffer assembly includes a first support plate, the first support plate is fixed to the bottom surface of the channel, and one side of the buffer pad is in contact with one side of the first support plate.

[0017] Optionally, the first support plate has a through hole, and the through hole penetrates the first support plate along an extension direction of the channel.

[0018] Optionally, the bottom of the first support plate has a bottom plate, and one side of the bottom plate is attached to the bottom of the channel and fixedly connected to the bottom of the channel.

[0019] Optionally, the first support plate includes a reinforcing rib, which is located on a side of the first support plate facing away from the buffer pad and is connected to both the first support plate and the bottom plate.

[0020] The beneficial effects of the technical solution provided by the embodiment of the present application include at least: the channel can be used for steel cables and other components connected to the traction trolley to pass through, so that the out-of-control traction trolley can enter the entrance of the channel. The buffer component faces the entrance of the channel and can directly collide with the traction trolley after entering to play a buffering role. After the traction trolley collides with the buffer component, the clamping component can further limit the traction trolley, so that the traction trolley can stop in the channel, and the wall is prevented from causing greater damage after the collision. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0022] Figure 1A schematic diagram of the structure of a protective device provided in an embodiment of the present application;

[0023] Figure 2 A partial schematic diagram of a protective device provided in an embodiment of the present application;

[0024] Figure 3 A partial structural schematic diagram of a clamping assembly provided in an embodiment of the present application.

[0025] The reference numerals in the figures represent respectively:

[0026] 1. Framework;

[0027] 100, channel;

[0028] 2. Buffer components;

[0029] 21. Buffer pad; 22. First support plate; 221. Bottom plate; 222. Reinforcement rib;

[0030] 200, through hole;

[0031] 3. Clamping assembly;

[0032] 31. driving part; 32. first clamping plate; 33. second clamping plate; 341. photoelectric sensor; 35. second supporting plate; 351. side plate;

[0033] 4. Steel cable.

[0034] The above drawings have shown clear embodiments of the present application, which will be described in more detail later. These drawings and text descriptions are not intended to limit the scope of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0036] The directional nouns involved in the embodiments of the present application, such as "upper", "lower", "side", etc., are generally represented by Figure 1 The relative relationship of the orientation shown in the figure is used as the basis, and these orientation terms are used only to more clearly describe the relationship between structures, not to describe absolute orientation. When the product is placed in different postures, the orientation may change, for example, "up" and "down" may be interchangeable.

[0037] Unless otherwise defined, all technical terms used in the embodiments of the present application have the same meanings as commonly understood by those of ordinary skill in the art.

[0038] In order to make the technical solutions and advantages of the present application more clear, the implementation methods of the present application will be further described in detail below with reference to the accompanying drawings.

[0039] The present application provides a protective device, such as Figure 1 As shown, the protective device includes a frame 1, a buffer assembly 2 and a clamping assembly 3, wherein:

[0040] The frame 1 has a channel 100 extending from one side of the frame 1 toward the inside of the frame 1;

[0041] The buffer assembly 2 is located in the channel 100 and faces the entrance of the channel 100;

[0042] The clamping assembly 3 is located on both sides of the channel 100 and between the buffer assembly 2 and the entrance of the channel 100 .

[0043] It is understandable that the passage 100 can be used for steel cables and other components connected to the tractor trolley to pass through, so that the out-of-control tractor trolley can enter the entrance of the passage 100. The buffer assembly 2 faces the entrance of the passage 100 and can directly collide with the tractor trolley after entering to play a buffering role. After the tractor trolley collides with the buffer assembly 2, the clamping assembly 3 can further limit the tractor trolley, so that the tractor trolley can stop in the passage 100, and the wall can avoid greater damage after the collision.

[0044] In the embodiment of the present application, the buffer assembly 2 achieves a buffering effect on the tractor by colliding with the tractor to decelerate the tractor. The buffer assembly 2 can generate a force opposite to the moving direction of the tractor by deforming the whole or part, and the force continuously acts on the tractor, so that the tractor can be continuously decelerated until it stops.

[0045] In the embodiment of the present application, the channel 100 of the frame 1 is used to accommodate the clamping assembly 3 and the buffer assembly 2, and it can completely or partially surround the above-mentioned two.

[0046] In the embodiment of the present application, the thickness of the side where the entrance of the channel 100 is located is greater than the thickness of the other sides to resist the impact caused by the traction vehicle deviating from its moving mode. The thickness of the side where the entrance of the channel 100 is located can be 3 to 10 times that of the other sides.

[0047] In the embodiment of the present application, the frame 1 can be formed by welding a plurality of plates to each other, and the thickness of the plates can be greater than 50 mm.

[0048] In the embodiment of the present application, the clamping assembly 3 can be used to maintain contact with the side of the tractor after the tractor enters the channel 100 to reduce the speed of the tractor. The photoelectric sensor 341 can be used to confirm whether the tractor has entered the channel 100, and after confirming that the tractor has entered the channel 100, the clamping assembly 3 is activated to clamp the tractor.

[0049] In the embodiment of the present application, the clamping assembly 3 can also be used to keep in contact with the traction trolley after the traction trolley stops in order to prevent the traction trolley from falling and maintain the stability of its posture.

[0050] In the embodiment of the present application, the clamping assembly 3 can clamp the opposite sides of the traction trolley to fix the traction trolley, or it can contact the top and bottom surfaces of the traction trolley to clamp it, thereby limiting the position of the traction trolley.

[0051] In some of the embodiments of this application, Figure 1 and Figure 2 As shown, the clamping assembly 3 includes a driving part 31, a first clamping plate 32 and a second clamping plate 33. The driving part 31 is respectively connected to the first clamping plate 32 and the second clamping plate 33 to drive the first clamping plate 32 and the second clamping plate 33 to move closer to and away from each other. The first clamping plate 32 and the second clamping plate 33 are respectively located on opposite sides of the channel 100.

[0052] It is understandable that the driving part 31 can achieve the first clamping plate 32 and the second clamping plate 33 to move closer to and farther from each other by driving the first clamping plate 32 and the second clamping plate 33. When the first clamping plate 32 and the second clamping plate 33 move away from each other, the gap between them can be entered by the traction trolley, which is conducive to the collision between the traction trolley and the buffer assembly 2 to complete the deceleration; when the first clamping plate 32 and the second clamping plate 33 move closer to each other, they can contact with both sides of the traction trolley at the same time, thereby realizing the limit of the traction trolley.

[0053] In the embodiment of the present application, the housing of the driving part 31 can be fixed in the channel 100, so that the wall of the channel 100 can provide sufficient support force for the driving part 31 to resist the reaction force when the first clamping plate 32 and the second clamping plate 33 clamp the tractor. The housing of the driving part 31 can be fixed to the wall of the channel 100 by bolt connection or the like.

[0054] In the embodiment of the present application, the first clamping plate 32 and the second clamping plate 33 can be supported by the second support plate 35, so that the two can move closer to or farther from each other under the action of the driving unit 31. One end of the second support plate 35 can be connected to the side where the entrance of the channel 100 of the frame 1 is located, and the first clamping plate 32 and the second clamping plate 33 are supported by the connection force with the frame 1.

[0055] In the embodiment of the present application, the end of the second support plate 35 has a side plate 351, and one side of the side plate 351 is connected to the side of the channel 100 entrance of the frame 1, so as to improve the connection performance between the second support plate 35 and the frame 1.

[0056] In the embodiment of the present application, the side panel 351 and the frame 1 can be connected by welding, bolt connection, etc.

[0057] In the embodiment of the present application, the driving unit 31 may be a power source such as a motor or a cylinder, which clamps the traction trolley after determining that the traction trolley is out of control and enters the channel 100 .

[0058] In the embodiment of the present application, there can be one driving unit 31 that drives both the first clamping plate 32 and the second clamping plate 33 , or there can be two driving units 31 that transmit power to the first clamping plate 32 and the second clamping plate 33 in a one-to-one correspondence.

[0059] In the embodiment of the present application, the clamping assembly 3 can be used to keep in contact with the side of the tractor after the tractor enters the channel 100 to reduce the speed of the tractor. The photoelectric sensor 341 can be used to confirm whether the tractor has entered the channel 100, and after confirming that the tractor has entered the channel 100, the first clamping plate 32 and the second clamping plate 33 are driven to move closer to each other to achieve clamping of the tractor.

[0060] In some of the embodiments of this application, Figure 1 As shown, the clamping assembly 3 includes a sensing unit, which is electrically connected to the driving part 31. The sensing unit is used to transmit a signal to the driving part 31 when sensing that the traction trolley enters the channel 100, so that the driving part 31 drives the first clamping plate 32 and the second clamping plate 33 to approach each other.

[0061] It can be understood that when the sensing unit senses that the traction trolley has entered the channel 100, it indicates that the traction trolley has lost control. By transmitting a signal to the drive unit 31, the traction trolley is clamped by the first clamping plate 32 and the second clamping plate 33 after colliding with the buffer assembly 2, so as to improve the stability of the traction trolley after stopping.

[0062] In the embodiment of the present application, the sensing unit may be an infrared sensor. When an object passes by, it will block the infrared rays, and the infrared sensor can detect the change of the infrared rays, thereby transmitting a signal to the driving unit 31.

[0063] In the embodiment of the present application, the sensing unit may be a magnetic field sensor. When an object passes by, the magnetic field near the magnetic field sensor changes, and the magnetic field sensor can detect these changes, thereby transmitting a signal to the driving unit 31.

[0064] In the embodiment of the present application, the sensing unit may be a weight sensor. When an object passes by, the weight near the weight sensor changes, and the weight sensor can detect the changes, thereby transmitting a signal to the driving unit 31.

[0065] In the embodiment of the present application, after the driving unit 31 drives the first clamping plate 32 and the second clamping plate 33 to approach each other for a period of time, the driving unit 31 can drive the two to separate from each other, so as to facilitate the staff to move the traction trolley away.

[0066] In some of the embodiments of this application, Figure 1 and Figure 3 As shown, the sensing unit includes a photoelectric sensor 341, which is located between the first clamping plate 32 and the entrance of the channel 100. The driving part 31 includes a time delay relay, a cylinder and an air source. The photoelectric sensor 341 is electrically connected to the time delay relay. The time delay relay is used to receive a signal from the photoelectric sensor 341 so that the air source drives the cylinder to move and drive the first clamping plate 32 and the second clamping plate 33 to move closer to each other.

[0067] It is understandable that the photoelectric sensor 341 can sense whether the traction trolley enters the passage 100. After sensing that the traction trolley enters the passage 100, the time delay relay can receive the signal from the photoelectric sensor 341, and connect the cylinder with the air source, so that the cylinder can be actuated to drive the first clamping plate 32 and the second clamping plate 33 to approach, thereby clamping the traction trolley.

[0068] In the embodiment of the present application, the cylinder includes a cylinder body and a piston, and a receiving cavity is formed between the two sides of the piston and the rigid body respectively. The gas source and the cylinder can be connected through an electromagnetic valve. The electromagnetic valve can control the amount of gas in the cylinder by opening and closing the corresponding position, and the piston in the cylinder will always move to the receiving cavity with low air pressure until the air pressure on both sides is balanced, thereby realizing the control of the movement of the first clamping plate 32 and the second clamping plate 33.

[0069] When the delay relay receives a signal from the photoelectric sensor 341, it starts timing, and when the set time is reached, the solenoid valve is started again, so that the amount of gas in one of the accommodating chambers increases, thereby realizing the movement of the piston.

[0070] The setting time can be 1 second, 2 seconds or 3 seconds, so as to clamp the traction trolley as much as possible after the collision is completed to achieve its limiting effect.

[0071] In the embodiment of the present application, the photoelectric sensor 341 can record the time when it is blocked, obtain the moving speed of the tractor through calculation by the control module, and then calculate the time required for the tractor to collide with the buffer assembly 2, and add the time spent in the calculation process as the set time, so as to avoid excessive friction between the first clamping plate 32 and the second clamping plate 33, resulting in damage to both. Among them, the distance between the buffer assembly 2 and the entrance of the channel 100 is greater than the length of the tractor, so as to facilitate the control module to have enough calculation time and avoid the situation where the photoelectric sensor 341 is still blocked after the tractor collides.

[0072] In the embodiment of the present application, the time required for the tractor to stop from collision can be calculated according to the moving speed of the tractor. Specifically, the acceleration of the tractor during the process from collision to stop can be set according to the moving speed of the tractor, and the time from collision to stop can be obtained according to the speed formula.

[0073] In the embodiment of the present application, the buffer component 2 can set up a query table, and each speed of the traction trolley corresponds to an acceleration. According to the moving speed of the traction trolley obtained by the photoelectric sensor 341, the corresponding acceleration is selected as the time for calculating the traction trolley from collision to stop.

[0074] In some of the embodiments of this application, Figure 1 As shown, a gasket is provided on one side of the first clamping plate 32 facing the second clamping plate 33 and on one side of the second clamping plate 33 facing the first clamping plate 32 .

[0075] It is understandable that the gasket can replace the first clamping plate 32 and the second clamping plate 33 to contact the side of the traction trolley, and has sufficient deformation capacity to adapt to the movement of the side of the traction trolley during the contact process to reduce the wear on the side of the traction trolley.

[0076] In the embodiment of the present application, the gasket can be connected to the first clamping plate 32 by bonding or other methods.

[0077] In the embodiment of the present application, the gasket can be connected to the second clamping plate 33 by bonding or other methods.

[0078] In the embodiment of the present application, a connection layer may be arranged on one side of the gasket connected to the first clamping plate 32 to improve the connection performance between the gasket and the first clamping plate 32 .

[0079] In the embodiment of the present application, a connection layer may be arranged on one side of the gasket connected to the second clamping plate 33 to improve the connection performance between the gasket and the second clamping plate 33 .

[0080] In some of the embodiments of this application, Figure 1As shown, the buffer assembly 2 includes a buffer pad 21 , and the entrance of the channel 100 is located within the orthographic projection of the buffer pad 21 on the frame 1 .

[0081] It is understandable that the entrance of the channel 100 is located within the orthographic projection of the buffer pad 21 on the frame 1, which is conducive to the direct contact between the traction trolley and the buffer pad 21 when entering the traction trolley from the entrance of the channel 100. On the one hand, the buffer pad 21 can be deformed by direct contact with the traction trolley, and the recovery speed of this deformation is relatively slow, so it can absorb the impact generated by the traction trolley and reduce the damage caused by the direct contact between the traction trolley and the buffer assembly 2.

[0082] In the embodiment of the present application, the buffer pad 21 can be made of suitable materials to adapt to the impact from the traction vehicle.

[0083] In some of the embodiments of this application, Figure 1 As shown, the buffer assembly 2 includes a first support plate 22 , which is fixed to the bottom surface of the channel 100 , and one side of the buffer pad 21 is in contact with one side of the first support plate 22 .

[0084] It can be understood that the first support plate 22 is fixed to the bottom surface of the channel 100, and can utilize the connection force with the bottom surface of the channel 100 to maintain a relatively fixed position, so that it can support the buffer pad 21, which is beneficial for the buffer pad 21 to maintain contact with the traction trolley to withstand impact, and at the same time maintain a relatively fixed position, so that the traction trolley can continue to be decelerated until it stops during the impact.

[0085] In the embodiment of the present application, when the buffer pad 21 is in direct contact with the traction trolley, the first support plate 22 can generate a connecting force with the bottom surface of the channel 100, and the direction of the connecting force is opposite to the direction of the traction trolley, thereby helping the traction trolley to slow down until it stops.

[0086] In the embodiment of the present application, one side of the buffer pad 21 and one side of the first support plate 22 can be bonded together by bonding, bolting, or the like.

[0087] In some of the embodiments of this application, Figure 1 As shown, the first support plate 22 has a through hole 200 , and the through hole 200 penetrates the first support plate 22 along the extension direction of the channel 100 .

[0088] It is understandable that the traction trolley is generally moved by the traction of the steel cable. The through hole 200 of the first support plate 22 can allow the steel cable to pass through, so that the steel cable can drive the traction trolley to move in the channel 100. The through hole 200 penetrates the first support plate 22 along the extension direction of the channel 100, which is conducive to the steel cable directly passing through the through hole 200 from the entrance of the channel 100 to achieve the traction effect on the traction trolley.

[0089] In the embodiment of the present application, the through hole 200 may be located at the bottom of the first support plate 22 and radially extend to the edge of the first support plate 22 , which is conducive to forming the through hole 200 on the first support plate 22 by cutting or other methods.

[0090] In the embodiment of the present application, the first support plate 22 may be formed by casting or the like, and the through hole 200 is formed by setting the shape of the mold during the casting process.

[0091] In some of the embodiments of this application, Figure 1 As shown, the bottom of the first support plate 22 has a bottom plate 221 , and one side of the bottom plate 221 is attached to the bottom of the channel 100 and is fixedly connected to the bottom of the channel 100 .

[0092] It is understandable that the bottom plate 221 is connected to the bottom of the channel 100 and can have a sufficient contact area with the bottom of the channel 100 to improve the connection force between the first support plate 22 and the bottom of the channel 100 .

[0093] In the embodiment of the present application, the bottom plate 221 and the bottom of the channel 100 can be connected by welding, bolting, etc.

[0094] In some of the embodiments of this application, Figure 1 As shown, the first support plate 22 includes a reinforcing rib 222 . The reinforcing rib 222 is located on a side of the first support plate 22 away from the buffer pad 21 and is connected to both the first support plate 22 and the bottom plate 221 .

[0095] It is understandable that when the first support plate 22 is impacted by the traction vehicle, the reinforcing rib 222 can transfer the impact to the bottom plate 221 and use its own shape characteristics to resist the impact. Such cooperation can improve the structural rigidity of the first support plate 22.

[0096] In the embodiment of the present application, the reinforcing rib 222 and the first support plate 22 can be connected by welding or other methods.

[0097] In the embodiment of the present application, the reinforcing rib 222 and the bottom plate 221 can be connected by welding or other methods.

[0098] In the embodiment of the present application, the first support plate 22 includes two reinforcing ribs 222 , which are respectively arranged on two opposite sides of the through hole 200 .

[0099] In the embodiment of the present application, the reinforcing rib 222 may be in the shape of a triangle, and two adjacent sides thereof are respectively connected to one side of the bottom plate 221 and the first support plate 22 in a one-to-one correspondence.

[0100] In the present application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. The term "plurality" refers to two or more than two, unless otherwise clearly defined.

[0101] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the present application disclosed herein. The present application is intended to cover any variations, uses or adaptations of the present application, which follow the general principles of the present application and include common knowledge or customary techniques in the art that are not disclosed in the present application. The specification and examples are intended to be exemplary only.

[0102] It should be understood that the present application is not limited to the precise structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

Claims

1. A protective device, characterized in that: The protective device comprises a frame (1), a buffer assembly (2) and a clamping assembly (3), wherein: The frame (1) has a channel (100), and the channel (100) extends from one side of the frame (1) to the inside of the frame (1); The buffer component (2) is located in the channel (100) and faces the entrance of the channel (100); The clamping assembly (3) is located on both sides of the channel (100), and is located between the buffer assembly (2) and the entrance of the channel (100).

2. The protective device according to claim 1, characterized in that: The clamping assembly (3) comprises a driving part (31), a first clamping plate (32) and a second clamping plate (33); the driving part (31) is respectively connected to the first clamping plate (32) and the second clamping plate (33) in a transmission manner so as to drive the first clamping plate (32) and the second clamping plate (33) to move closer to and away from each other; the first clamping plate (32) and the second clamping plate (33) are respectively located on opposite sides of the channel (100).

3. The protective device according to claim 2, characterized in that: The clamping assembly (3) comprises a sensing unit, the sensing unit being electrically connected to the driving part (31), and the sensing unit being used to transmit a signal to the driving part (31) when sensing that the traction trolley has entered the channel (100), so that the driving part (31) drives the first clamping plate (32) and the second clamping plate (33) to move closer to each other.

4. The protective device according to claim 3, characterized in that: The sensing unit includes a photoelectric sensor (341), and the photoelectric sensor (341) is located between the first clamping plate (32) and the entrance of the channel (100). The driving part (31) includes a time delay relay, a cylinder and an air source. The photoelectric sensor (341) is electrically connected to the time delay relay, and the time delay relay is used to receive a signal from the photoelectric sensor (341) so that the air source drives the cylinder to move and drive the first clamping plate (32) and the second clamping plate (33) to approach each other.

5. The protection device according to claim 2, characterized in that: Gaskets are provided on one side of the first clamping plate (32) facing the second clamping plate (33) and on one side of the second clamping plate (33) facing the first clamping plate (32).

6. The protection device according to claim 1, characterized in that: The buffer assembly (2) comprises a buffer pad (21), and the entrance of the channel (100) is located within the orthographic projection of the buffer pad (21) on the frame (1).

7. The protection device according to claim 6, characterized in that: The buffer assembly (2) comprises a first support plate (22), the first support plate (22) being fixed to the bottom surface of the channel (100), and one side of the buffer pad (21) being in contact with one side of the first support plate (22).

8. The protection device according to claim 7, characterized in that: The first support plate (22) has a through hole (200), and the through hole (200) penetrates the first support plate (22) along the extension direction of the channel (100).

9. The protection device according to claim 7, characterized in that: The bottom of the first support plate (22) has a bottom plate (221), and one side of the bottom plate (221) is attached to the bottom of the channel (100) and is fixedly connected to the bottom of the channel (100).

10. The protection device according to claim 9, characterized in that: The first support plate (22) comprises a reinforcing rib (222), wherein the reinforcing rib (222) is located on a side of the first support plate (22) facing away from the buffer pad (21), and is connected to both the first support plate (22) and the bottom plate (221).

Images