Line erecting mechanism and multifunctional emergency flood drainage device
By designing a multi-functional emergency drainage device, using the combination of erecting units and drainage units, the problems of rainwater erosion and inconvenience in traditional equipment are solved, and the stability, flexibility and multi-environmental adaptability of the device are achieved, and it is suitable for a variety of emergency drainage scenarios.
Patent Information
- Application Number
- CN202411724193.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-28
- Publication Date
- 2025-03-21
AI Technical Summary
Traditional emergency drainage equipment is susceptible to rainwater erosion when erecting lines, and is inconvenient to use, which limits the rapid deployment of equipment and multi-environmental adaptability.
A multi-functional emergency drainage device is designed, including an erection unit and a drainage unit. The mount unit adopts a combination of fixed blocks, mount blocks, clamping blocks, connectors, fixing plates and waterproof parts. The design of clamping blocks and connectors achieves quick connection and stable installation, and the waterproof parts ensure the waterproof performance of the line. The drainage unit includes a frame, a pump body and a drain port, combined with a telescopic unit and a support unit to improve the flexibility and stability of the device.
The device ensures stability and reliability, is suitable for a variety of emergency drainage and line mount scenarios, has good waterproofing performance and lighting functions, and can effectively respond to emergency drainage needs in complex environments.
Smart Images

Figure CN119674788A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of emergency waterlogging drainage operations, in particular to a line erection mechanism and a multifunctional emergency waterlogging drainage device. Background Art
[0002] With the acceleration of urbanization, the degree of urban ground hardening has increased, the area of green space has decreased, and with the frequent occurrence of extreme weather events, urban waterlogging has become increasingly serious. Urban waterlogging not only affects the normal life and travel of citizens, but may also cause significant economic losses and casualties. Therefore, rapid and effective emergency drainage measures have become an important part of urban management and disaster prevention and mitigation.
[0003] Traditional emergency drainage equipment usually has the following problems: Traditional drainage equipment is often composed of multiple independent components, such as engines, water pumps, pipes, etc. These components need to be assembled on site, which increases preparation time and labor intensity. Due to the large size and heavy weight of the equipment, traditional drainage equipment needs to rely on large machinery such as forklifts or cranes during transportation, which not only increases operating costs, but also limits the rapid deployment of equipment in emergency situations. The design of some drainage equipment fails to fully consider the use requirements in different environments, such as special conditions in urban roads, industrial areas and outdoor environments, resulting in limited scope of use of the equipment. In addition, the installed lines will also be eroded by rainwater, affecting their use. Summary of the invention
[0004] In view of the above problems or problems existing in the prior art, the present invention is proposed.
[0005] Therefore, the object of the present invention is to provide a multifunctional emergency drainage device, which can solve the problem that the lines of the emergency drainage device are easily eroded by rainwater, and the problem that the emergency drainage device is inconvenient to use.
[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: a multifunctional emergency drainage device, comprising a mounting unit, including a fixing block, a mounting block arranged on one side of the fixing block, two sets of clamping blocks arranged on both sides of the mounting block, a connecting piece arranged on one side of the mounting block, a fixing plate arranged on one side of the connecting piece, and a waterproof piece arranged on the inner side of the fixing plate;
[0007] The erection block is hollow inside, and one side is inclined;
[0008] The clamping block is fixedly connected to two ends of the fixing block.
[0009] As a preferred solution of the line erection mechanism of the present invention, wherein: the clamping block includes a connecting portion, and a clamping portion protruding from one side of the connecting portion;
[0010] An illuminating lamp is arranged at the end of the fixing plate.
[0011] As a preferred solution of the line installation mechanism of the present invention, wherein: the clamping block is U-shaped, and the bottom is connected to the fixing block;
[0012] The clamping portion includes a plurality of groups of oblique grooves arranged on both side end surfaces thereof, and a transverse groove arranged inside the oblique grooves.
[0013] As a preferred solution of the line installation mechanism of the present invention, the connecting member includes a clamping seat arranged on the outside of the clamping portion, and a connecting rod arranged on one side of the clamping seat.
[0014] As a preferred solution of the line installation mechanism of the present invention, the waterproof component includes a wire placement sleeve arranged on the clamping tube, an inner side of the clamping tube, and a locking sleeve arranged on one side of the wire placement sleeve.
[0015] As a preferred solution of the line installation mechanism of the present invention, the clamping tube includes a threaded ring arranged on the outside thereof, and a petal column arranged on one side of the threaded ring.
[0016] As a preferred solution of the line installation mechanism of the present invention, wherein: a wire hole is provided through the wire sleeve;
[0017] The locking sleeve cooperates with the threaded ring.
[0018] In order to solve the above technical problems, the present invention also provides the following technical solutions: a multifunctional emergency flood drainage device, comprising a flood drainage unit, including a frame, a pump body arranged inside the frame, and a drainage port arranged on one side of the pump body;
[0019] The telescopic unit comprises a telescopic cylinder arranged on the top of the frame body, and a connecting frame arranged on the top of the telescopic cylinder;
[0020] The supporting unit comprises lifting members arranged on both sides of the frame and a moving component arranged on the bottom of the frame.
[0021] As a preferred solution of the multifunctional emergency drainage device of the present invention, the lifting member includes a clamping plate, a force arm arranged on the outside of the clamping plate, and a supporting leg arranged on one side of the force arm.
[0022] As a preferred solution of the multifunctional emergency drainage device of the present invention, the moving component includes a vehicle body arranged at the bottom of the frame, and moving wheels arranged at the bottom of the vehicle body.
[0023] The beneficial effects of the present invention are as follows: the stability and reliability of the device are ensured, and the device is applicable to a variety of emergency drainage and line installation scenarios. By optimizing the internal space layout, improving the flexibility and stability of the connection, and having good waterproof performance and lighting functions, the device performs well in practical applications and can effectively respond to emergency drainage needs in various complex environments. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. 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 creative work.
[0025] Figure 1 It is a schematic diagram of the structure of the line erection mechanism of the present invention.
[0026] Figure 2 It is an exploded schematic diagram of the connection relationship structure of the line erection mechanism of the present invention.
[0027] Figure 3 It is a schematic diagram of the waterproof component structure in the line installation mechanism of the present invention.
[0028] Figure 4 It is a schematic structural diagram of the multifunctional emergency drainage device of the present invention.
[0029] Figure 5 It is a schematic structural diagram of the multifunctional emergency drainage device of the present invention in an open state. DETAILED DESCRIPTION
[0030] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.
[0031] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.
[0032] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor is it a separate or selective embodiment that is mutually exclusive with other embodiments.
[0033] Example 1
[0034] Reference Figure 1 , which is the first embodiment of the present invention, and provides a line erection mechanism, including an erection unit 100, including a fixing block 101, an erection block 102 arranged on one side of the fixing block 101, two sets of clamping blocks 103 arranged on both sides of the erection block 102, a connecting piece 104 arranged on one side of the erection block 102, a fixing plate 105 arranged on one side of the connecting piece 104, and a waterproof piece 106 arranged on the inner side of the fixing plate 105;
[0035] The interior of the erection block 102 is hollow, and one side is inclined;
[0036] The clamping blocks 103 are fixedly connected to both ends of the fixing block 101 .
[0037] The interior of the fixed block 101 is hollow, and one side is in the shape of an inclined surface, which is used to optimize the internal space layout. The erection block 102 is arranged on one side of the fixed block 101, and the interior is hollow, with one side being a vertical surface and the other side being an inclined surface, so as to fit with the clamping blocks 103 on both sides to achieve angle adjustment. The clamping blocks 103 are arranged on both sides of the erection block 102, and each group of clamping blocks 103 is fixedly connected to both ends of the fixed block 101, and is used to quickly connect with external equipment or structures. The connecting member 104 is arranged on one side of the erection block 102, and the two groups of clamping blocks 103 and the middle erection block 102 are fixedly connected together by the connecting member 104. The fixing plate 105 is arranged on one side of the connecting member 104, and the axis of the fixing plate 105 is provided with a through hole for the passage of the line. The waterproof member 106 is arranged on the inner side of the fixing plate 105, and there is an interface for connecting the line with the external device inside the waterproof member 106 to ensure that the line is completely waterproof.
[0038] Preferably, the fixed block 101 is hollow inside, with one side being in the shape of an inclined surface, and is connected to the device by means of fixed welding to ensure the stability of the structure. The erection block 102 is hollow inside, with one side being a vertical surface and the other side being an inclined surface, and is connected to the fixed block 101 by means of slotted clamping, which is convenient for disassembly and assembly. Each group of the clamping blocks 103 is fixedly connected to the two ends of the fixed block 101, and a through slot is provided through the axis of the clamping block 103, which is convenient for erecting and leading out the line from the inside of the erection block 102. The connector 104 is provided on one side of the erection block 102, and the two groups of clamping blocks 103 and the middle erection block 102 are fixedly connected together by the connector 104 to ensure the stability of the structure. The fixing plate 105 is provided on one side of the connector 104, and a through hole is provided on the axis of the fixing plate 105 for the passage of the line. The waterproof member 106 is disposed on the inner side of the fixing plate 105 , and an interface for connecting the circuit with an external device is provided inside the waterproof member 106 , so as to ensure that the circuit is completely waterproof.
[0039] In summary, the device is connected by the mounting block 102 and the fixing block 101 by means of slotted clamping, which is convenient for disassembly and assembly, and improves the convenience of maintenance and use. One side of the mounting block 102 is designed with a slope, which fits with the clamping blocks 103 on both sides, and can adjust the angle to adapt to different installation environments. The service life and reliability of the device in humid or outdoor environments are improved. The line erection mechanism is suitable for a variety of scenarios, such as urban road waterlogging, industrial waterlogging, field drainage, etc., and has broad application prospects.
[0040] Example 2
[0041] Reference Figure 1 to Figure 3 , which is the second embodiment of the present invention, and is different from the first embodiment in that: it also includes a mounting unit 100, including a fixing block 101, a mounting block 102 arranged on one side of the fixing block 101, two sets of clamping blocks 103 arranged on both sides of the mounting block 102, a connecting piece 104 arranged on one side of the mounting block 102, a fixing plate 105 arranged on one side of the connecting piece 104, and a waterproof piece 106 arranged on the inner side of the fixing plate 105;
[0042] The interior of the erection block 102 is hollow, and one side is inclined;
[0043] The clamping blocks 103 are fixedly connected to both ends of the fixing block 101 .
[0044] Furthermore, the clamping block 103 includes a connecting portion 103a and a clamping portion 103b protruding from one side of the connecting portion 103a;
[0045] An illuminating lamp 200 is provided at an end of the fixing plate 105 .
[0046] Furthermore, the clamping block 103 is U-shaped, and the bottom is connected to the fixing block 101;
[0047] The clamping portion 103b includes a plurality of groups of oblique grooves 103b-1 disposed on both side end surfaces thereof, and a transverse groove 103b-2 disposed inside the oblique grooves 103b-1.
[0048] Furthermore, the connecting member 104 includes a clamping seat 104a disposed outside the clamping portion 103b, and a connecting rod 104b disposed on one side of the clamping seat 104a.
[0049] Furthermore, the waterproof member 106 includes a clamping tube 106a, a wire placement sleeve 106b disposed inside the clamping tube 106a, and a locking sleeve 106c disposed on one side of the wire placement sleeve 106b.
[0050] Furthermore, the clamping sleeve 106a includes a threaded ring 106a-1 disposed on the outer side thereof, and a petal column 106a-2 disposed on one side of the threaded ring 106a-1.
[0051] Furthermore, a wire hole 106b-1 is provided through the wire sleeve 106b;
[0052] The locking sleeve 106c cooperates with the threaded ring 106a-1.
[0053] It should be noted that the fixed block 101 is hollow inside, and one side is in the shape of an inclined plane, which is used to optimize the internal space layout, reduce wind resistance, and improve the stability of the device in an outdoor environment. The fixed block 101 is connected to the device by a fixed welding method to ensure the stability of the structure. The erection block 102 is arranged on one side of the fixed block 101, and is hollow inside, with one side being a vertical surface and the other side being an inclined surface, so as to fit with the clamping blocks 103 on both sides to achieve angle adjustment. The erection block 102 is connected to the fixed block 101 by a slot clamping method, which is convenient for disassembly and assembly. The clamping blocks 103 are arranged on both sides of the erection block 102, and each group of clamping blocks 103 is fixedly connected to the two ends of the fixed block 101 for quick connection with external equipment or structures. The clamping block 103 is U-shaped, and the bottom is connected to the fixed block 101. The two side end surfaces of the clamping block 103 are provided with oblique grooves 103b-1, and the inner side of the oblique grooves 103b-1 is provided with transverse grooves 103b-2. Such a design can not only ensure the stability of the connection, but also adapt to the connection requirements of different sizes. Figure 2 As shown, the design of the oblique groove 103b-1 and the transverse groove 103b-2 improves the flexibility of the connection. The connecting piece 104 is arranged on one side of the mounting block 102, and the two groups of clamping blocks 103 and the middle mounting block 102 are fixedly connected together through the connecting piece 104. The connecting piece 104 includes a clamping seat 104a and a connecting rod 104b, the clamping seat 104a is arranged on the outside of the clamping block 103, and the connecting rod 104b extends from the clamping seat 104a. The fixing plate 105 is arranged on one side of the connecting piece 104, and the end of the fixing plate 105 is provided with a lighting lamp 200. A through hole is opened at the axis of the fixing plate 105 for the passage of the line. As shown Figure 1 As shown, the through-hole design on the fixing plate 105 facilitates the arrangement of circuits.
[0054] An illuminating lamp 200 is disposed at the end of the fixing plate 105 , and the illuminating lamp 200 is connected to a power source by means of internal wiring, thereby ensuring the realization of the illuminating function.
[0055] The waterproof component 106 is arranged on the inner side of the fixing plate 105, and is used to protect the internal circuits from the external environment. The waterproof component 106 includes a clamping tube 106a, a wire sleeve 106b and a locking sleeve 106c. A threaded ring 106a-1 is arranged on the outer side of the clamping tube 106a, and a petal column 106a-2 is arranged on one side of the threaded ring 106a-1. The wire sleeve 106b is arranged on the inner side of the clamping tube 106a, and a wire hole 106b-1 is arranged through the wire sleeve 106b, and is used to accommodate and protect the internal circuits. The locking sleeve 106c is arranged on one side of the wire sleeve 106b, and cooperates with the threaded ring 106a-1 to fix the wire sleeve 106b to prevent the circuits from loosening. Figure 3 As shown, the design of the locking sleeve 106 c ensures the sealing of the waterproof member 106 .
[0056] Fix the fixing block 101 on the ground or other supporting structure, and fix it through the fixing holes with screws or bolts. Fix the erection block 102 to one side of the fixing block 101 by means of slot clamping. The inclined surface design of the erection block 102 can better adapt to different installation environments. Figure 1 As shown, the inclined surface design of the mounting block 102 can better adapt to different installation environments. The clamping block 103 is fixedly connected to the two ends of the fixing block 101 to ensure that the U-shaped design of the clamping block 103 can be quickly connected to external equipment or structures. The two side end faces of the clamping block 103 are provided with an oblique groove 103b-1, and the inner side of the oblique groove 103b-1 is provided with a transverse groove 103b-2. The clamping seat 104a of the connecting member 104 is fixed to the outer side of the clamping block 103, and the connecting rod 104b extends from the clamping seat 104a. The design of the connecting member 104 ensures the stability of the structure. As shown Figure 2 As shown, the fixing plate 105 is fixed to one side of the connecting member 104 and fixed through the mounting hole using screws or bolts. The through hole design on the fixing plate 105 facilitates the layout of the circuit. The lighting lamp 200 is fixed to the end of the fixing plate 105 and connected to the power supply through internal wiring. The design of the lighting lamp 200 improves the operational safety at night or under low light conditions. The clamping tube 106a of the waterproof member 106 is screwed into the inner side of the fixing plate 105, ensuring that the threaded ring 106a-1 of the clamping tube 106a matches the threaded hole of the fixing plate 105, and the waterproof member 106 is firmly fixed to the fixing plate 105 by rotating the clamping tube 106a. The wire sleeve 106b is arranged on the inner side of the clamping tube 106a, and a wire hole 106b-1 is arranged through the wire sleeve 106b to accommodate and protect the internal circuit. The locking sleeve 106c is arranged on one side of the wire placement sleeve 106b and cooperates with the threaded ring 106a-1 to fix the wire placement sleeve 106b to prevent the line from loosening.
[0057] In summary, this embodiment ensures the stability and reliability of the device and is suitable for a variety of emergency drainage and line installation scenarios. By optimizing the internal space layout, improving the flexibility and stability of the connection, and having good waterproof performance and lighting functions, the installation mechanism performs well in practical applications and can effectively respond to emergency drainage needs in various complex environments.
[0058] Example 3
[0059] Reference Figure 4-5 , which is the third embodiment of the present invention, which is different from the first two embodiments in that: a multifunctional emergency drainage device is also provided, including a drainage unit 300, including a frame 301, a pump body 302 arranged on the inner side of the frame 301, and a drainage port 303 arranged on one side of the pump body 302;
[0060] The telescopic unit 400 includes a telescopic cylinder 401 disposed on the top of the frame 301 and a connecting frame 402 disposed on the top of the telescopic cylinder 401;
[0061] The supporting unit 500 includes lifting members 501 disposed on both sides of the frame 301 , and a moving assembly 502 disposed at the bottom of the frame 301 .
[0062] Furthermore, the lifting member 501 includes a clamping plate 501a, a force arm 501b disposed on the outside of the clamping plate 501a, and a supporting leg 501c disposed on one side of the force arm 501b.
[0063] Furthermore, the moving assembly 502 includes a vehicle body 502a disposed at the bottom of the frame 301 and moving wheels 502b disposed at the bottom of the vehicle body 502a.
[0064] It should be noted that the frame 301 is the basic frame of the entire device, used to support and fix other components. Figure 4 As shown, the design of the frame 301 ensures the overall structure of the device is stable. The pump body 302 is arranged on the inner side of the frame 301 to pump out the accumulated water. Figure 4 As shown, the pump body 302 is designed to be located at the center of the frame 301 for easy maintenance and repair. A drain port 303 is provided on one side of the pump body 302 for draining the pumped water. Figure 4 As shown, the position of the drain port 303 is designed to facilitate the connection of the drain pipe. The telescopic cylinder 401 is arranged on the top of the frame 301 and is used to adjust the height of the erection unit 100. The telescopic cylinder 401 adopts a multi-stage telescopic design and can be adjusted in height manually or electrically to adapt to different working environments. Figure 4As shown, the design of the telescopic cylinder 401 improves the flexibility of the device. The connecting frame 402 is arranged on the top of the telescopic cylinder 401 for connecting other components or equipment. The connecting frame 402 is made of high-strength aluminum alloy and has good stability and corrosion resistance. Figure 4 As shown, the design of the connecting frame 402 is convenient for connecting other devices. The lifting member 501 is arranged on both sides of the frame 301, and is used to lift the device when needed. The lifting member 501 includes a clamping plate 501a, a force arm 501b arranged on the outside of the clamping plate 501a, and a support leg 501c arranged on one side of the force arm 501b. The clamping plate 501a is fixed on both sides of the frame 301, and is used to support the force arm 501b. The force arm 501b is arranged on the outside of the clamping plate 501a, and is used to transmit the lifting force. The support leg 501c is arranged on one side of the force arm 501b, and is used to lift the device when needed. The support leg 501c adopts an adjustable design, and the height can be adjusted according to the terrain to ensure the stability of the device. The moving component 502 is arranged at the bottom of the frame 301, and is used to move the device. The moving component 502 includes a vehicle body 502a and a moving wheel 502b arranged at the bottom of the vehicle body 502a. The vehicle body 502a is fixed to the bottom of the frame 301 and is used to support the moving wheels 502b. The moving wheels 502b are arranged at the bottom of the vehicle body 502a and are used to move the device. The moving wheels 502b are designed with a large diameter and have good passability and stability.
[0065] In summary, this device ensures the stability and reliability of the device and is suitable for a variety of emergency drainage and line installation scenarios. By optimizing the internal space layout, improving the flexibility and stability of the connection, and having good waterproof performance and lighting functions, the device performs well in practical applications and can effectively respond to emergency drainage needs in various complex environments.
[0066] It is important to note that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.
Claims
1. A line erection mechanism, characterized in that: The device comprises a mounting unit (100), comprising a fixing block (101), a mounting block (102) arranged on one side of the fixing block (101), two groups of clamping blocks (103) arranged on both sides of the mounting block (102), a connecting piece (104) arranged on one side of the mounting block (102), a fixing plate (105) arranged on one side of the connecting piece (104), and a waterproof piece (106) arranged on the inner side of the fixing plate (105); The erection block (102) is hollow inside, and one side is in the shape of an inclined surface; The clamping block (103) is fixedly connected to two ends of the fixing block (101).
2. The line installation mechanism according to claim 1, characterized in that: The clamping block (103) comprises a connecting portion (103a) and a clamping portion (103b) protruding from one side of the connecting portion (103a); An illuminating lamp (200) is provided at the end of the fixing plate (105).
3. The line installation mechanism according to claim 2, characterized in that: The clamping block (103) is U-shaped, and the bottom is connected to the fixing block (101); The clamping portion (103b) comprises a plurality of groups of oblique grooves (103b-1) arranged on both side end surfaces thereof, and a transverse groove (103b-2) arranged inside the oblique grooves (103b-1).
4. The line installation mechanism according to claim 3, characterized in that: The connecting member (104) comprises a clamping seat (104a) arranged outside the clamping portion (103b), and a connecting rod (104b) arranged on one side of the clamping seat (104a).
5. The line installation mechanism according to claim 4, characterized in that: The waterproof component (106) comprises a wire-setting sleeve (106b) arranged on the clamping sleeve (106a), arranged on the inner side of the clamping sleeve (106a), and a locking sleeve (106c) arranged on one side of the wire-setting sleeve (106b).
6. The line installation mechanism according to claim 5, characterized in that: The clamping cylinder (106a) comprises a threaded ring (106a-1) arranged on the outer side thereof, and a petal column (106a-2) arranged on one side of the threaded ring (106a-1).
7. The line installation mechanism according to claim 6, characterized in that: The wire placement sleeve (106b) is provided with a wire hole (106b-1) extending therethrough; The locking sleeve (106c) matches the threaded ring (106a-1).
8. A multifunctional emergency drainage device, characterized in that: It comprises the line installation mechanism according to any one of claims 1 to 7, and also comprises a drainage unit (300), comprising a frame (301), a pump body (302) arranged inside the frame (301), and a drainage outlet (303) arranged on one side of the pump body (302); The telescopic unit (400) comprises a telescopic cylinder (401) arranged on the top of the frame (301), and a connecting frame (402) arranged on the top of the telescopic cylinder (401); The supporting unit (500) comprises lifting members (501) arranged on both sides of the frame (301), and a moving component (502) arranged at the bottom of the frame (301).
9. The multifunctional emergency drainage device according to claim 8, characterized in that: The lifting member (501) comprises a clamping plate (501a), a force arm (501b) arranged outside the clamping plate (501a), and a supporting leg (501c) arranged on one side of the force arm (501b).
10. The multifunctional emergency drainage device according to claim 9, characterized in that: The moving assembly (502) comprises a vehicle body (502a) arranged at the bottom of the frame (301), and moving wheels (502b) arranged at the bottom of the vehicle body (502a).