Traffic engineering isolation belt

Abstract

The embodiment of the utility model provides a traffic engineering isolation belt, and relates to the technical field of isolation belts. The traffic engineering isolation belt comprises two first supporting bodies, at least one second supporting body and at least two folding assemblies. The two folding assemblies are arranged on the two sides of the second supporting body correspondingly, and the ends, away from the second supporting body, of the two folding assemblies are connected with the first supporting body; the second supporting body is of a hollow structure, and a counterweight assembly capable of extending to the ground and a locking assembly used for locking the counterweight assembly are arranged in the second supporting body. Rapid unfolding and storage are achieved through the folding assembly, the stability of the isolation belt is remarkably improved by combining the design of the counterweight assembly and the locking assembly, and compared with traditional road cones and spliced isolation fences, the isolation belt has the advantages of being easy and convenient to operate, high in deployment efficiency and high in external force interference resistance.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of isolation belt, concretely refers to a traffic engineering isolation belt. BACKGROUND

[0002] In the field of traffic engineering, isolation belts, as an important traffic facility, are widely used in road management and safety assurance. The main function of isolation belts is to separate traffic flow, guide traffic direction, and protect pedestrians or specific areas from vehicle intrusion. By setting up isolation belts, traffic accidents can be effectively reduced, and the orderliness and safety of road use can be improved. However, with the acceleration of urbanization and the continuous increase of traffic flow, the existing isolation belt design and construction methods gradually expose some shortcomings in practical application, which need to be improved to meet the needs of modern traffic management.

[0003] Currently, in road construction or temporary traffic control, commonly used isolation facilities include road cones and spliced isolation barriers. Road cones are widely used because of their small size, portability and ease of placement, but their shortcomings are also obvious: due to their small size, road cones can be easily ignored by drivers in some situations, especially in low-light or obstructed visibility environments; at the same time, road cones are light in weight and can be easily displaced by wind or vehicle air flow, even tipping over, thus reducing the isolation effect. As for spliced isolation barriers, although they can provide more stable separation function, their installation process requires segmental connection, which is time-consuming and labor-intensive, and the efficiency of rapid deployment in emergency situations is low. The existence of these problems has prompted the research and development of more efficient and reliable isolation facility design. SUMMARY

[0004] According to an embodiment of the utility model, a traffic engineering isolation belt is provided to solve the problems raised in the background technology.

[0005] In the first aspect of the utility model, a traffic engineering isolation belt is provided.

[0006] The traffic engineering isolation belt comprises two first support bodies, at least one second support body, and at least two folding assemblies; two folding assemblies are arranged on both sides of the second support body, and the ends of the two folding assemblies away from the second support body are connected to the first support bodies.

[0007] The second support body is of a hollow structure, and the inside of the second support body is provided with a counterweight assembly that can extend to the ground and a locking assembly for locking the counterweight assembly.

[0008] Preferably, the folding assembly includes two intersecting connecting rods, which are rotatably connected at their intersection via a connecting shaft. The upper ends of the two connecting rods are rotatably connected to the first support body and the second support body, respectively. The first support body and the second support body are each provided with a connecting member having a groove. The lower ends of the two connecting rods are slidably connected to the groove on the connecting member.

[0009] Preferably, the connecting rod is provided with reflective material.

[0010] Preferably, the counterweight assembly includes a rod, a connecting part, and a counterweight block; the rod extends into the upper wall of the second support body and is slidably connected to the upper wall of the second support body; the connecting part is connected to the lower end of the rod and is slidably connected to the inner wall of the second support body; the lower end of the connecting part extends out of the second support body and is fixedly connected to the counterweight block.

[0011] Preferably, a handle is provided at the upper end of the rod.

[0012] Preferably, the locking assembly includes two mounting seats, two locking rods, and two sets of torsion springs; the two mounting seats are fixedly connected to the second support body, the side wall of the second support body is provided with a notch for the locking rods to extend into, the two locking rods are respectively rotatably connected to the two mounting seats, the torsion springs are connected between the locking rods and the mounting seats, and the torsion springs provide torsional force to the locking rods, causing the locking rods to extend into the interior of the second support body through the notches;

[0013] A locking block is fixedly installed on the rod body, and a guide slope is provided on the locking block. A locking surface is provided at the upper end of the locking rod, and the lower surface of the locking block is in contact with the locking surface.

[0014] Preferably, the lower end of the first support body is provided with a counterweight base that contacts the ground.

[0015] Preferably, a walking assembly is connected to the counterweight base. The walking assembly includes a mounting plate embedded in the bottom surface of the counterweight base, a mounting component hinged to the mounting plate, a wheel frame, and a walking wheel. A magnet is provided on the mounting component, and a magnetic ring that attracts the magnet is provided on the mounting plate. The wheel frame is fixedly connected to the mounting component, and the walking wheel is rotatably connected to the wheel frame.

[0016] One or more technical solutions provided in this application have at least the following technical effects or advantages:

[0017] This utility model provides a traffic engineering barrier. By manually pulling one of the first supports, moving it horizontally away from the second support, a folding assembly connected to the first support unfolds, extending the entire barrier. Once extended to the desired length, the two first and second supports are fixed to the ground using a fixing device to ensure stable support. After fixing, the operator manually releases the locking assembly from the counterweight assembly, allowing the counterweight assembly to extend downwards along the internal channel of the second support under its own weight until it contacts the ground. The weight of the counterweight assembly and its ground contact design significantly improve the stability of the second support, preventing the barrier from shifting or tipping due to wind or external impacts.

[0018] When the isolation strip needs to be stored, first pull the counterweight assembly upwards, retracting it to its initial position inside the second support body, and then relock it using the locking assembly to prevent the counterweight assembly from accidentally falling during storage. Next, the operator pushes the two first supports horizontally towards the second support body. During this process, the two folding components are gradually folded under pressure, eventually bringing the two first supports close to the second support body, completing the folding of the isolation strip. The folded isolation strip has a compact structure, is easy to store and transport, and is reusable.

[0019] The design of the barrier strip, which features a folding component for quick unfolding and storage, combined with a counterweight and locking component, significantly improves its stability. Compared to traditional traffic cones and modular barriers, it offers advantages such as ease of operation, high deployment efficiency, and strong resistance to external interference. The counterweight base at the lower end of the first support, along with the flip-up walking component, facilitates flexibility during movement and provides stable support when stationary. Meanwhile, the reflective material enhances the warning effect at night or in low-visibility environments, thereby effectively improving safety and practicality during road construction or temporary traffic control.

[0020] It should be understood that the description in this utility model description section is not intended to limit the key or essential features of the embodiments of this utility model, nor is it intended to restrict the scope of this utility model. Other features of this utility model will become readily apparent from the following description. Attached Figure Description

[0021] The above and other features, advantages, and aspects of the various embodiments of the present invention will become more apparent from the accompanying drawings and the following detailed description. In the drawings, the same or similar reference numerals denote the same or similar elements, wherein:

[0022] Figure 1 A three-dimensional structural schematic diagram of a traffic engineering median strip according to an embodiment of the present invention is shown;

[0023] Figure 2 A front view structural schematic diagram of a traffic engineering median strip according to an embodiment of the present invention is shown;

[0024] Figure 3 A schematic diagram of the deployed state of a traffic engineering median strip according to an embodiment of the present invention is shown;

[0025] Figure 4 A cross-sectional structural schematic diagram of the second support of a traffic engineering median strip according to an embodiment of the present invention is shown;

[0026] Figure 5 An exploded view of the locking assembly of a traffic engineering barrier according to an embodiment of the present invention is shown.

[0027] Figure 6 A three-dimensional structural schematic diagram of the walking component of a traffic engineering median strip according to an embodiment of the present invention is shown;

[0028] Figure 7 An exploded structural schematic diagram of the walking assembly of a traffic engineering median strip according to an embodiment of the present invention is shown.

[0029] Tag Name

[0030] 1-First support body, 11-Counterweight base, 2-Second support body, 21-Notch, 3-Folding assembly, 31-Connecting rod, 32-Connecting shaft, 33-Reflective sticker, 4-Counterweight assembly, 41-Rod body, 42-Connecting part, 43-Counterweight block, 44-Handle, 45-Locking block, 451-Guide slope, 5-Locking assembly, 51-Mounting base, 52-Locking rod, 521-Locking surface, 53-Torsion spring, 6-Connector, 7-Walking assembly, 71-Mounting plate, 711-Magnetic ring, 72-Mounting part, 721-Magnet, 73-Wheel frame, 74-Walking wheel. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0032] Furthermore, the term "and / or" in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0033] like Figures 1 to 7 As shown, the traffic engineering median strip includes: two first support bodies 1, at least one second support body 2, and at least two folding components 3. The two folding components 3 are symmetrically arranged on the left and right sides of the second support body 2, respectively. One end of each folding component 3 is fixedly connected to the second support body 2, while the other end is movably connected to the corresponding first support body 1. The second support body 2 adopts a hollow structure design, and its interior contains a counterweight component 4 that can extend vertically towards the ground and a locking component 5 for locking the position of the counterweight component 4. The counterweight component 4 can move up and down inside the second support body 2, while the locking component 5 fixes the counterweight component 4 by mechanical or magnetic means.

[0034] When using this traffic barrier, firstly, move the entire barrier to the designated location where traffic isolation is required. Then, manually pull one of the first support bodies 1 horizontally away from the second support body 2. At this point, the folding assembly 3 connected to the first support body 1 unfolds, extending the entire barrier. After unfolding to the required length, fix the two first support bodies 1 and the second support body 2 to the ground using fixing devices (such as ground stakes, bolts, or suction cups, depending on the embodiment) to ensure a stable support. After fixing, the operator manually releases the locking assembly 5 from the counterweight assembly 4, allowing the counterweight assembly 4 to extend downwards along the internal channel of the second support body 2 under its own weight until it contacts the ground. The weight of the counterweight assembly 4 and its ground contact design significantly improve the stability of the second support body 2, preventing the barrier from shifting or tipping due to wind or external impacts.

[0035] When the isolation strip needs to be stored, first pull the counterweight component 4 upwards, retracting it to its initial position inside the second support body 2, and then relock it using the locking component 5 to prevent the counterweight component 4 from accidentally falling during storage. Then, the operator pushes the two first supports 1 horizontally towards the second support body 2. During this process, the two folding components 3 are gradually folded under pressure, eventually bringing the two first supports 1 and the second support body 2 together, completing the folding of the isolation strip. The folded isolation strip has a compact structure, is easy to store and transport, and is reusable.

[0036] In this embodiment, the folding assembly 3 includes two intersecting connecting rods 31. The intersection of the two connecting rods 31 is rotatably connected by a connecting shaft 32, allowing the two connecting rods 31 to rotate relative to each other around the connecting shaft 32. The upper ends of the two connecting rods 31 are respectively connected to the first support body 1 and the second support body 2 by a rotatable connection, such as by a hinge or a pin, to ensure that the connecting rods 31 have a certain degree of freedom of movement at their upper ends. Meanwhile, the first support body 1 and the second support body 2 are respectively fixedly provided with connecting members 6, and the connecting members 6 have vertically extending grooves. The lower ends of the two connecting rods 31 are slidably connected to the corresponding grooves on the connecting members 6, such as by a slider or roller engaging with the groove, allowing the lower ends of the connecting rods 31 to slide up and down along a predetermined path within the groove.

[0037] When the operator pulls the two first support bodies 1 to move them horizontally away from each other, the first support bodies 1 rotate at their connecting points, causing the connecting rods 31 connected to them to move. Since the two connecting rods 31 are cross-connected by a connecting shaft 32, their movement causes them to rotate relative to each other around the connecting shaft 32, thus achieving unfolding. Simultaneously, the lower ends of the two connecting rods 31 are subjected to traction within the grooves of the connecting member 6, sliding upwards along the grooves until the folding assembly 3 is fully unfolded and reaches a stable state. At this point, the upper end of the groove acts as a limiting structure, restricting further movement of the lower ends of the connecting rods 31, thereby ensuring that the unfolded folding assembly 3 maintains a fixed angle and support strength.

[0038] In this embodiment, a reflective sticker 33 is provided on the connecting rod 31. The reflective sticker 33 is preferably attached to the outer surface of the connecting rod 31, and its material can be a microprism-type reflective film or a glass microsphere-type reflective material with high reflectivity, used to enhance the visibility of the median strip in low-light environments (such as at night or in foggy weather). The placement and area of ​​the reflective sticker 33 can be adjusted according to actual needs, for example, evenly distributed along the length of the connecting rod 31, to improve traffic warning effects and further enhance the safety of the median strip in road use.

[0039] In this embodiment, the counterweight assembly 4 includes a rod 41, a connecting part 42, and a counterweight block 43. The rod 41 extends into the internal cavity of the second support body 2 from the opening in the upper wall of the second support body 2 and is slidably connected to the upper wall of the second support body 2, for example, by means of a sleeve or guide groove structure to allow the rod 41 to slide up and down. The connecting part 42 is fixedly connected to the lower end of the rod 41, preferably by means of screwing, welding, or integral molding to achieve a firm connection. The outer side of the connecting part 42 slides in contact with the inner wall of the second support body 2, for example by providing a sliding pad or roller to reduce frictional resistance and ensure that the connecting part 42 can move smoothly inside the second support body 2. The lower end of the connecting part 42 extends downward and out of the bottom opening of the second support body 2, and is fixedly connected to the counterweight block 43. The fixing method can be bolted or embedded to ensure that there is no relative movement between the counterweight block 43 and the connecting part 42.

[0040] The connecting part 42 and the counterweight 43 are made of cement material, which has high density and weight to provide sufficient counterweight effect. When the locking assembly 5 releases the locking state of the rod 41, the counterweight assembly 4 falls as a whole under the action of gravity until the counterweight 43 contacts the ground. At this time, the bottom of the counterweight 43 forms direct support with the ground, which significantly lowers the center of gravity of the second support body 2, thereby improving the overall stability of the isolation strip. At the same time, the contact between the counterweight 43 and the ground increases the friction between the isolation strip and the ground, effectively preventing the isolation strip from sliding or tipping due to external forces (such as wind or vehicle collisions). The bottom surface of the counterweight 43 can be further designed as a rough surface or have anti-slip textures added to optimize the friction effect.

[0041] In this embodiment, a handle 44 is provided at the upper end of the rod 41. The handle 44 is preferably a ring or T-shaped structure, fixed to the top of the rod 41, for example, by a threaded connection or welding. The handle 44 facilitates manual lifting of the counterweight assembly 4 by the operator. When the isolation belt needs to be stored, the operator can grasp the handle 44 to lift the rod 41 together with the connecting part 42 and the counterweight 43, causing the counterweight 43 to detach from the ground and retract into the second support body 2. The rod 41 is then locked by the locking assembly 5. The size and shape of the handle 44 can be ergonomically designed to improve operational comfort and efficiency.

[0042] In this embodiment, the locking assembly 5 includes two mounting seats 51, two locking rods 52, and two sets of torsion springs 53. The two mounting seats 51 are fixedly installed on the inner or outer wall of the second support body 2, for example, by bolts or welding. A notch 21 is provided on the side wall of the second support body 2 for the locking rods 52 to extend into, the size and position of which match the range of motion of the locking rods 52. The two locking rods 52 are respectively connected to their corresponding mounting seats 51 by a rotatable connection, for example, by a pin or hinge. Each set of torsion springs 53 is connected between the corresponding locking rod 52 and the mounting seat 51. One end of the torsion spring 53 is fixed to the mounting seat 51, and the other end acts on the locking rod 52, providing a torsional torque to the locking rod 52, so that the locking rod 52 maintains a tendency to extend into the second support body 2 when no external force is applied, and extends into the internal space of the second support body 2 through the notch 21.

[0043] A locking block 45 is fixedly installed on the rod 41 of the counterweight assembly 4. The locking block 45 can be integrally connected to the rod 41 by welding or screwing. A guide slope 451 is provided on the upper part of the locking block 45. The guide slope 451 extends outward and downward from the upper end of the locking block 45, forming an inclined surface that facilitates the sliding of the locking rod 52. A locking surface 521 is provided on the upper end of the locking rod 52. The locking surface 521 is preferably a plane or a contact surface that matches the lower surface of the locking block 45 to ensure stable contact during locking. In the locked state, the lower surface of the locking block 45 is in direct contact with the locking surface 521 of the locking rod 52, thereby restricting the downward movement of the rod 41.

[0044] When the operator pulls the counterweight assembly 4 upwards, the rod 41 drives the locking block 45 to move upwards along the interior of the second support 2. When the locking block 45 rises to contact the two locking rods 52, the guide ramp 451 exerts a squeezing effect on the upper ends of the locking rods 52. Due to the inclined design of the guide ramp 451, the upward movement of the locking block 45 pushes the upper ends of the two locking rods 52 outwards, causing the two locking rods 52 to rotate relative to each other around their respective rotational connection points with the mounting base 51, resulting in the upper ends of the locking rods 52 moving away from each other. During this process, the two sets of torsion springs 53 are compressed, storing elastic potential energy. When the locking block 45 has completely passed through the gap between the two locking rods 52, the operator releases the pulling force on the counterweight assembly 4. At this time, the elastic restoring force of the torsion springs 53 drives the two locking rods 52 to reset, causing the upper ends of the locking rods 52 to move inwards again and extend into the interior of the second support 2. Subsequently, the locking block 45 moves slightly downward under the weight of the counterweight assembly 4, and its lower surface comes into close contact with the locking surfaces 521 of the two locking rods 52, thus locking the rod 41. At this time, the rod 41 is fixed in its current position, and the counterweight block 43 is lifted off the ground and remains suspended. Next, the operator can push the first support 1 to move or fold it. Since the counterweight block 43 is no longer in contact with the ground, the movement of the second support 2 is not restricted by the ground friction, thus ensuring the smoothness of the isolation strip during storage.

[0045] In this embodiment, a counterweight base 11 is provided at the lower end of the first support body 1, which is in contact with the ground. The counterweight base 11 is made of cement material and has high mass and density to improve the stability of the first support body 1 by increasing the weight at the bottom. The lower surface of the counterweight base 11 can be designed to be flat or slightly rough textured to enhance the friction with the ground, thereby effectively preventing the first support body 1 from sliding or tipping over during use.

[0046] In this embodiment, a walking assembly 7 is connected to the counterweight base 11. The walking assembly 7 includes a mounting plate 71 embedded in the bottom surface of the counterweight base 11, a mounting member 72 hinged to the mounting plate 71, a wheel frame 73, and walking wheels 74. The mounting plate 71 is fixed to the bottom of the counterweight base 11 by means of embedding or screwing, preferably flush with the bottom surface of the counterweight base 11 to maintain the compactness of the overall structure. The mounting member 72 is hinged to the mounting plate 71 by a hinge or pivot, allowing the mounting member 72 to rotate around the hinge point. A magnet 721, such as a circular or bar permanent magnet, is fixedly disposed on the mounting member 72 and embedded in the surface or interior of the mounting member 72. A magnetic ring 711 is correspondingly disposed on the mounting plate 71 and attracts the magnet 721. The magnetic ring 711 can be a ring structure made of ferromagnetic material and is embedded in the surface of the mounting plate 71, its position precisely aligned with the magnet 721 when rotated to the attracting state. The wheel frame 73 is fixedly connected to the mounting component 72, for example, by welding or bolting to achieve a secure assembly. The traveling wheel 74 is rotatably connected to the wheel frame 73 via bearings or pins. The traveling wheel 74 is preferably made of wear-resistant rubber or plastic to ensure smooth rolling on the ground and long service life.

[0047] When the first support 1 needs to be moved, the operator first flips the mounting piece 72, causing it to rotate around the hinge point until the magnet 721 contacts and attracts the magnetic ring 711. Figure 6 The state is shown. At this time, the magnetic force between magnet 721 and magnetic ring 711 fixes the mounting piece 72 in the unfolded position, with the traveling wheels 74 facing downwards and in contact with the ground. Subsequently, the operator can pull the two first support bodies 1 to move them closer or further apart in the horizontal direction. The traveling wheels 74 roll on the ground to reduce movement resistance, thereby achieving rapid unfolding or retraction of the isolation strip. After the two first support bodies 1 have moved to the target position, the operator lifts the first support bodies 1, releases the traveling wheels 74 from the ground, and flips the mounting piece 72 again, turning it upside down as shown. Figure 3 As shown in the diagram, the mounting component 72 is retracted, the traveling wheels 74 are no longer in contact with the ground, and the bottom surface of the counterweight base 11 is directly in contact with the ground, using its own weight and friction to ensure the stability of the first support 1. During the flipping process, the magnet 721 and the magnetic ring 711 disengage, and the mounting component 72 can be fixed in the retracted position by additional limiting structures (such as buckles or springs) to prevent it from accidentally flipping during use.

[0048] The design of the aforementioned walking component 7 enables convenient switching between the moving and fixed states of the first support body 1 through a flip-out structure. The adsorption mechanism of the magnet 721 and the magnetic ring 711 further improves the stability and efficiency of the operation, making it suitable for flexible deployment of traffic barriers in different scenarios.

[0049] The specific embodiments described above do not constitute a limitation on the scope of protection of this utility model. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A traffic engineering median strip, characterized in that, include: Two first support bodies (1), at least one second support body (2), and at least two folding components (3); the two folding components (3) are respectively disposed on both sides of the second support body (2), and the ends of the two folding components (3) away from the second support body (2) are connected to the first support body (1); The second support (2) is a hollow structure. Inside the second support (2) is a counterweight assembly (4) that can extend to the ground and a locking assembly (5) for locking the counterweight assembly (4).

2. The traffic engineering median strip according to claim 1, characterized in that, The folding assembly (3) includes two intersecting connecting rods (31). The intersection of the two connecting rods (31) is rotatably connected by a connecting shaft (32). The upper ends of the two connecting rods (31) are rotatably connected to the first support body (1) and the second support body (2), respectively. The first support body (1) and the second support body (2) are respectively provided with connecting members (6) with grooves. The lower ends of the two connecting rods (31) are slidably connected to the grooves on the connecting members (6).

3. The traffic engineering median strip according to claim 2, characterized in that, The connecting rod (31) is provided with a reflective sticker (33).

4. The traffic engineering median strip according to claim 1, characterized in that, The counterweight assembly (4) includes a rod (41), a connecting part (42), and a counterweight block (43); the rod (41) extends into the upper wall of the second support body (2) and is slidably connected to the upper wall of the second support body (2); the connecting part (42) is connected to the lower end of the rod (41); the connecting part (42) is slidably connected to the inner wall of the second support body (2); and the lower end of the connecting part (42) extends out of the second support body (2) and is fixedly connected to the counterweight block (43).

5. The traffic engineering median strip according to claim 4, characterized in that, A handle (44) is provided at the upper end of the rod (41).

6. The traffic engineering median strip according to claim 4, characterized in that, The locking assembly (5) includes two mounting seats (51), two locking rods (52), and two sets of torsion springs (53); the two mounting seats (51) are fixedly connected to the second support body (2), and the side wall of the second support body (2) is provided with a notch (21) for the locking rods (52) to extend into. The two locking rods (52) are rotatably connected to the two mounting seats (51) respectively. The torsion springs (53) are connected between the locking rods (52) and the mounting seats (51), and the torsion springs (53) provide torsional force to the locking rods (52), causing the locking rods (52) to extend into the interior of the second support body (2) through the notch (21); A locking block (45) is fixedly installed on the rod (41), and a guide slope (451) is provided on the locking block (45). A locking surface (521) is provided at the upper end of the locking rod (52), and the lower surface of the locking block (45) is in contact with the locking surface (521).

7. The traffic engineering median strip according to claim 1, characterized in that, The first support (1) has a counterweight base (11) at its lower end that is in contact with the ground.

8. The traffic engineering median strip according to claim 7, characterized in that, The counterweight base (11) is connected to a walking assembly (7). The walking assembly (7) includes a mounting plate (71) embedded in the bottom surface of the counterweight base (11), a mounting component (72) hinged to the mounting plate (71), a wheel frame (73), and a walking wheel (74). A magnet (721) is provided on the mounting component (72), and a magnetic ring (711) is provided on the mounting plate (71) that attracts the magnet (721). The wheel frame (73) is fixedly connected to the mounting component (72), and the walking wheel (74) is rotatably connected to the wheel frame (73).

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