A wheel-track conversion rescue vehicle for disaster relief

Abstract

The present invention provides a wheel-track conversion rescue vehicle for disaster relief, which relates to the technical field of rescue vehicles. It includes a rescue vehicle body, a base is provided in the rescue vehicle body, mudguards are fixedly connected to both sides of the top of the base, and fixed plates are provided at both ends of the mudguards. A group of power shafts are provided on both sides of the base, and a group of power shafts rotate at both ends of the base respectively. The sprockets on the power shafts are connected to the roller assembly through a chain, and tracks are provided on both sides of the base. The two ends of the top of the track are matched and connected with two symmetrically arranged power wheels, and the two ends of the bottom of the track are matched and connected with two symmetrically arranged auxiliary wheels. A group of placement grooves are opened on both sides of the base, and roller assemblies are rotatably connected in the two symmetrically arranged placement grooves. The present invention can enable the rescue vehicle to adapt to roads in different environments during use by arranging roller assemblies and auxiliary assemblies.

Description

Technical Field

[0001] The invention relates to the technical field of rescue vehicles, in particular to a wheel-track conversion rescue vehicle for disaster relief. Background Art

[0002] A rescue vehicle is a special vehicle designed to respond to sudden incidents and emergencies. It is mainly used for rescue and emergency response in scenarios such as natural disasters, accidents and disasters. It is an important tool for responding to sudden incidents and emergencies. Its versatility, rapid response capability and mobility enable it to play a vital role in rescue work.

[0003] Most of the existing rescue vehicles adopt a roller-type or track-type movement mode. Due to the relatively simple movement mode and the complex road conditions in the disaster area, the rescue vehicles cannot be used in the complex disaster area environment during use. In addition, the existing rescue vehicles that can be converted from wheels to tracks have a large conversion mechanism in actual use, which not only occupies a large space on the vehicle body, but also the operation is complicated and time-consuming during the wheel-track conversion. Therefore, the present application provides a wheel-track conversion rescue vehicle for disaster relief to meet the needs. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a wheel-track conversion rescue vehicle for disaster relief to solve the problem that the wheel-track conversion part of the existing wheel-track conversion rescue vehicle occupies a large body space and the operation is relatively cumbersome during the conversion process.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0006] A wheel-track conversion rescue vehicle for disaster relief comprises a rescue vehicle body, wherein the rescue vehicle body is provided with a base, mudguards are fixedly connected to both sides of the top of the base, and fixed plates are provided at both ends of the mudguards, a group of power shafts are provided on both sides of the base, and a group of the power shafts are respectively rotated at both ends of the base, and the sprockets on the power shafts are connected with roller assemblies through chains, tracks are respectively provided on both sides of the base, the top ends of the tracks are matched and connected with two symmetrically arranged power wheels, and the bottom ends of the tracks are matched and connected with two symmetrically arranged auxiliary wheels, a group of placement grooves are provided on both sides of the base, and roller assemblies are rotatably connected in the two symmetrically arranged placement grooves, one end of the roller assembly is rotatably connected to a first oil storage rod, one end of the first oil storage rod is connected to a hose of a hydraulic system in the rescue vehicle body, and the first oil storage rod is connected to an auxiliary assembly through a hose, the roller assembly is used to support the rescue vehicle body and enable the rescue vehicle body to travel on the road, and the auxiliary assembly is used to perform wheel-track conversion on the rescue vehicle body.

[0007] Optionally, a group of translation grooves are opened on both sides of the top of the base, a group of arc grooves are opened on both sides of the bottom of the base, an axis gear is provided on one side of the power wheel, the axis gear of the power wheel is rotatably connected in the translation groove, one side of the auxiliary wheel is rotatably connected with a connecting shaft, and the connecting shaft of the auxiliary wheel is slidably connected in the arc groove.

[0008] Optionally, the roller assembly includes a rotating wheel, the rotating wheel is rotatably connected to a group of supporting rods in an annular array, one end of the supporting rod is rotatably connected to a grounding wheel, and one side of the grounding wheel is rotatably connected to a push rod.

[0009] Optionally, one side of the rotating wheel is rotatably connected to a fixed plate, and a rotating sprocket is provided on the rotating wheel, and the rotating sprocket is connected to a sprocket on the power shaft through a chain.

[0010] Optionally, a first rotating groove in an annular array is opened on the other side of the rotating wheel, one end of the support rod is rotatably connected to the first rotating groove, and a second rotating groove is opened on one side of the grounding wheel, and the other end of the support rod is rotatably connected to the second rotating groove.

[0011] Optionally, a first sliding groove is opened on the other side of the grounding wheel, a sliding block is slidably connected in the first sliding groove, a push rod is rotatably connected to the sliding block, one end of the push rod is fixedly connected to a fixed column, one end of the fixed column is rotatably connected to one side of a connecting block, and the other side of the connecting block is fixedly connected to the first piston rod in the first oil storage rod.

[0012] Optionally, the auxiliary component includes an auxiliary rod, one side of the auxiliary rod is fixedly connected to an auxiliary shaft gear, the auxiliary shaft gear is meshed with a toothed plate, and one end of the toothed plate is fixedly connected to the second piston rod of the second oil storage rod.

[0013] Optionally, the bottom of the other side of the auxiliary rod is rotatably connected to an auxiliary wheel via a connecting shaft, and a second sliding groove is provided on the top of the auxiliary rod, in which a shaft gear of a power wheel is rotatably connected.

[0014] Optionally, the second oil storage rod is connected to the first oil storage rod through a hose, the second oil storage rod is fixedly connected to the rescue vehicle body, and the toothed plate is slidably connected to the rescue vehicle body.

[0015] Optionally, one end of the power shaft is fixedly connected with a transmission gear, and the transmission gear is meshed with the shaft gear of the power wheel. A power gear is provided on one side of the transmission gear, and the power gear is meshed with the output gear of the power system in the rescue vehicle body.

[0016] Compared with the prior art, the present invention has at least the following beneficial effects:

[0017] In the above scheme, by setting a roller assembly, when the rescue vehicle drives to a place with good road conditions, the ground-engaging wheels of the circular array are pushed by the push rod, so that the ground-engaging wheels can be unfolded and supported on the road surface at the same time. By changing the driving mode of the rescue vehicle from track-type to roller-type, the rescue vehicle can turn flexibly and move faster, thereby achieving the advantage of high operating efficiency. When the rescue vehicle drives to a place with poor road conditions, the ground-engaging wheels of the circular array can be retracted in the placement groove by the reverse movement of the push rod, thereby enhancing the passability of the rescue vehicle, reducing the pressure when grounding, and increasing the traction and adhesion. Furthermore, by setting a retractable roller assembly, during use, space occupied on the vehicle can be saved, so that the rescue vehicle can be applied to more disaster areas, and the rescue vehicle can be quickly converted from track to wheel through simple operation, shortening the preparation time, so that rescue personnel can arrive at the disaster area site for rescue faster.

[0018] By setting up auxiliary components, when the rescue vehicle's driving mode changes from track-type to roller-type, the positions of the power wheels and auxiliary wheels will change, thereby changing the height of the lowest point of the track, reducing the risk of the track falling to the ground or being hooked by obstacles during the driving of the rescue vehicle, and when the rescue vehicle changes back to the track-type driving mode, the power wheels and auxiliary wheels can automatically return to their original positions so that the track contacts the ground again, avoiding the operation of manually adjusting the track position, and also avoiding the situation in which the progress of disaster relief is affected by the track being hooked during the disaster relief process. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings, which are incorporated herein and constitute a part of the specification, illustrate embodiments of the invention and, together with the description, further serve to explain the principles of the invention and to enable those skilled in the relevant art to make and use the invention.

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of a wheel-track conversion rescue vehicle for disaster relief;

[0021] Figure 2 It is a schematic diagram of the internal structure of part of the present invention;

[0022] Figure 3 This is a schematic diagram of the base structure of the present invention;

[0023] Figure 4 It is a schematic diagram of the structure of the roller assembly and the auxiliary assembly of the present invention;

[0024] Figure 5 It is a schematic diagram of the structure of the roller assembly of the present invention;

[0025] Figure 6 It is a partial structural schematic diagram of the roller assembly of the present invention;

[0026] Figure 7 This is a schematic diagram of the exploded structure of the roller assembly of the present invention;

[0027] Figure 8 This is a schematic diagram of the auxiliary component structure of the present invention;

[0028] Fig. 9 It is a schematic diagram of the structure of the auxiliary components of the present invention;

[0029] Fig.10 This is a schematic diagram of the first oil storage rod and the second oil storage rod of the present invention.

[0030] [Reference Signs]

[0031] 1. Rescue vehicle body; 11. Base; 111. Placement groove; 112. Arc groove; 113. Translation groove; 2. Mudguard; 21. Fixed plate; 3. Power shaft; 31. Chain; 32. Transmission gear; 33. Power gear; 4. Track; 41. Power wheel; 42. Auxiliary wheel; 5. Roller assembly; 51. Rotating wheel; 511. Rotating sprocket; 512. First rotating groove; 52. Support rod; 53. Grounding wheel; 531. Second rotating groove; 532. First slide groove; 533. Sliding block; 54. Push rod; 541. Fixed column; 542. Connecting block; 6. First oil storage rod; 61. First piston rod; 7. Auxiliary assembly; 71. Auxiliary rod; 711. Second slide groove; 72. Auxiliary shaft gear; 73. Tooth plate; 74. Second oil storage rod; 741. Second piston rod.

[0032] As shown in the figure, in order to clearly implement the structure of the embodiment of the present invention, specific structures and devices are marked in the figure, but this is only for illustrative purposes and is not intended to limit the present invention to the specific structure, device and environment. According to specific needs, ordinary technicians in this field can adjust or modify these devices and environments. DETAILED DESCRIPTION

[0033] The following is a detailed description of a wheel-track conversion rescue vehicle for disaster relief provided by the present invention in conjunction with the accompanying drawings and specific embodiments. At the same time, it is explained here that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and those skilled in the art may also adopt other alternatives to implement some known technologies; and the accompanying drawings are only for more specific description of the embodiments, and are not intended to specifically limit the present invention.

[0034] It should be noted that the references to "one embodiment", "embodiment", "exemplary embodiments", "some embodiments" and the like in the specification indicate that the embodiments described may include specific features, structures or characteristics, but not every embodiment may include the specific features, structures or characteristics. In addition, when a specific feature, structure or characteristic is described in conjunction with an embodiment, it should be within the knowledge of a person skilled in the art to implement such feature, structure or characteristic in conjunction with other embodiments (whether or not explicitly described).

[0035] In general, a term can be understood, at least in part, from its use in context. For example, depending, at least in part, on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in the singular sense, or can be used to describe a combination of features, structures, or characteristics in the plural sense. Additionally, the term "based on" can be understood as not necessarily intended to convey an exclusive set of factors, but can instead, depending, at least in part, on the context, allow for the presence of other factors that are not necessarily explicitly described.

[0036] It will be understood that the meanings of “on,” “over,” and “above” in the present invention should be interpreted in the broadest manner, so that “on” not only means “directly on” something, but also includes the meaning of being “on” something with intervening features or layers therebetween, and “on” or “over” not only means “on” or “above” something, but also includes the meaning of being “on” or “above” something with no intervening features or layers therebetween.

[0037] Additionally, spatially relative terms such as "under," "beneath," "lower," "above," "upper," and the like may be used herein for descriptive convenience to describe the relationship of one element or feature to another element or features, as shown in the accompanying drawings. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the accompanying drawings. The device may be oriented in other ways, and the spatially relative descriptors used herein may be similarly interpreted accordingly.

[0038] like Figures 1 to 3As shown, an embodiment of the present invention provides a wheel-track conversion rescue vehicle for disaster relief, including a rescue vehicle body 1, a base 11 is provided in the rescue vehicle body 1, mudguards 2 are fixedly connected to both sides of the top of the base 11, and fixed plates 21 are provided at both ends of the mudguard 2, a group of power shafts 3 are provided on both sides of the base 11, a group of power shafts 3 are respectively rotated at both ends of the base 11, and the sprockets on the power shafts 3 are connected to the roller assembly 5 through chains 31, tracks 4 are respectively provided on both sides of the base 11, the top ends of the track 4 are matched with two symmetrically arranged power wheels 41, and the bottom ends of the track 4 are matched with two symmetrically arranged auxiliary wheels 42, a group of placement grooves 111 are opened on both sides of the base 11, and the roller assembly 5 is rotatably connected in the two symmetrically arranged placement grooves 111, one end of the roller assembly 5 is rotatably connected to the first oil storage rod 6, one end of the first oil storage rod 6 is connected to the hose of the hydraulic system in the rescue vehicle body 1, and the first oil storage rod 6 is connected to the auxiliary wheel 42 through the hose. The components 7 are connected, the roller component 5 is used to support the rescue vehicle body 1 and enable the rescue vehicle body 1 to travel on the road, and the auxiliary component 7 is used to convert the wheel and track of the rescue vehicle body 1. When the rescue vehicle arrives at the disaster area, due to the complicated road conditions in the disaster area, when the road conditions are relatively bad, the rescue vehicle can use the track wheels to pass through. When using the track wheels, the power system in the rescue vehicle drives the power shaft 3 to rotate through the power gear 33, and the power shaft 3 drives the power wheel 41 to rotate. At this time, the track 4 located on the power wheel 41 starts to rotate and drives the rescue vehicle to travel on the road. When the road conditions are relatively good, the hydraulic system inside the rescue vehicle transports the oil to the first oil storage rod 6 through a hose, and while extending the roller component 5, the positions of the power wheel 41 and the auxiliary wheel 42 are changed, so that the roller component 5 can be supported on the ground. At this time, the power shaft 3 drives the roller component 5 to rotate, and the rescue vehicle is driven to travel on the road through the roller component 5.

[0039] As an implementation method in this embodiment, Figures 2 to 7As shown, the roller assembly 5 includes a rotating wheel 51, which is rotatably connected to a group of supporting rods 52 in an annular array. One end of the supporting rod 52 is rotatably connected to a grounding wheel 53, and one side of the grounding wheel 53 is rotatably connected to a push rod 54. One side of the rotating wheel 51 is rotatably connected to the fixed plate 21. A rotating sprocket 511 is provided on the rotating wheel 51, and the rotating sprocket 511 is connected to the sprocket on the power shaft 3 through a chain 31. A group of first rotating grooves 512 in an annular array are opened on the other side of the rotating wheel 51, one end of the supporting rod 52 is rotatably connected to the first rotating groove 512, one side of the grounding wheel 53 is opened with a second rotating groove 531, and the other end of the supporting rod 52 is rotatably connected to the second rotating groove 531. A first sliding groove 532 is opened on the other side of the grounding wheel 53, and a slider 533 is slidably connected in the first sliding groove 532. A push rod 54 is rotatably connected to the slider 533, and one end of the push rod 54 is fixedly connected to a fixed column 541. The fixed column 54 1 is rotatably connected to one side of the connecting block 542, and the other side of the connecting block 542 is fixedly connected to the first piston rod 61 in the first oil storage rod 6. When the hydraulic system inside the rescue vehicle transports oil to the first oil storage rod 6 through the hose, the oil entering the first oil storage rod 6 will push the first piston rod 61. When the first piston rod 61 moves, it will push the fixed column 541 to move the push rod 54. During the movement of the push rod 54, the grounding wheel 53 will be pushed out of the placement groove 111 and the grounding wheel 53 will be unfolded. When the support rod 52 is perpendicular to the grounding wheel 53 and the rotating wheel 51, the hydraulic system stops transporting oil to the first oil storage rod 6, and at this time, the grounding wheels 53 in the circular array support the rescue vehicle body 1 and leave the ground. When the power shaft 3 rotates, the rotating wheel 51 will be driven to rotate through the chain 31. When the rotating wheel 51 rotates, the grounding wheels 53 in the annular array will roll on the ground to move the rescue vehicle.

[0040] In this embodiment, if Figures 2 to 7 As shown, when the push rod 54 moves, it will push the grounding wheel 53 while causing the slider 533 to slide in the first slide groove 532 of the grounding wheel 53. When the support rod 52 is perpendicular to the grounding wheel 53 and the rotating wheel 51, when the push rod 54 pushes the grounding wheel 53, the support rod 52 cannot continue to rotate because its rotation angle reaches the maximum. At this time, the resistance encountered by the push rod 54 increases. After receiving the signal, the control system in the rescue vehicle body 1 stops the hydraulic system from delivering oil to the first oil storage rod 6.

[0041] As an implementation method in this embodiment, Figures 8 to 10As shown, the auxiliary component 7 includes an auxiliary rod 71, one side of the auxiliary rod 71 is fixedly connected to an auxiliary shaft gear 72, the auxiliary shaft gear 72 is meshed with a tooth plate 73, one end of the tooth plate 73 is fixedly connected to a second piston rod 741 of a second oil storage rod 74, the bottom of the other side of the auxiliary rod 71 is rotatably connected to the auxiliary wheel 42 through a connecting shaft, a second slide groove 711 is provided on the top of the auxiliary rod 71, and the shaft gear of the power wheel 41 is rotatably connected in the second slide groove 711, and a group of translation grooves 113 are provided on both sides of the top of the base 11. A group of arc grooves 112 are provided on both sides of the bottom of the base 11, a shaft gear is provided on one side of the power wheel 41, the shaft gear of the power wheel 41 is rotatably connected in the translation groove 113, one side of the auxiliary wheel 42 is rotatably connected with a connecting shaft, the connecting shaft of the auxiliary wheel 42 is slidably connected in the arc groove 112, the second oil storage rod 74 is connected to the first oil storage rod 6 through a hose, the second oil storage rod 74 is fixedly connected to the rescue vehicle body 1, the toothed plate 73 is slidably connected to the rescue vehicle body 1, one end of the power shaft 3 is fixedly connected to the transmission gear 32, the transmission The gear 32 is meshed with the shaft gear of the power wheel 41. A power gear 33 is provided on one side of the transmission gear 32. The power gear 33 is meshed with the output gear of the power system in the rescue vehicle body 1. When the hydraulic system inside the rescue vehicle transports the oil to the first oil storage rod 6 through the hose, some of the oil will enter the second oil storage rod 74 through the hose. When the oil enters the second oil storage rod 74, the entered oil will push the second piston rod 741. When the second piston rod 741 moves, it will pull the gear plate 73. When the tooth plate 73 is pulled, the auxiliary shaft gear 72 meshing with the bottom of the tooth plate 73 starts to rotate. When the auxiliary shaft gear 72 rotates, the auxiliary rod 71 starts to rotate. When the auxiliary rod 71 rotates, on the one hand, the auxiliary wheel 42 connected to the bottom of the auxiliary rod 71 will slide in the arc groove 112. On the other hand, the power wheel 41 connected to the top of the auxiliary rod 71 will move to the other end of the translation groove 113 under the action of the second slide groove 711 and the translation groove 113, and separate from the transmission gear 32 at the same time.

[0042] In this embodiment, if Figures 8 to 10As shown, when the rescue vehicle needs to switch back to the crawler wheel movement mode, it is only necessary to extract the oil in the first oil storage rod 6 through the hydraulic system. When the oil in the first oil storage rod 6 is extracted, the first piston rod 61 will move in the opposite direction. On the one hand, the push rod 54 can be moved in the opposite direction, so that the grounding wheel 53 of the annular array gradually shrinks and returns to the placement groove 111. On the other hand, the oil in the second oil storage rod 74 will also be extracted through the hose, and the second piston rod 741 will move in the opposite direction and push the gear plate 73 to make the auxiliary shaft gear 72 rotate in the opposite direction, and the auxiliary rod 71 rotates in the opposite direction to reset the power wheel 41 and the auxiliary wheel 42. At this time, the shaft gear on the power wheel 41 is meshed with the transmission gear 32 again. When the power shaft 3 rotates, it can drive the power wheel 41 to rotate and the crawler track 4 to rotate.

[0043] According to the working principle of the present invention, when the rescue vehicle arrives at the disaster area, since the road conditions in the disaster area are relatively complicated, when the road conditions are relatively bad, the rescue vehicle can use track wheels to pass through. When using the track wheels, the power system in the rescue vehicle drives the power shaft 3 to rotate through the power gear 33, and the power shaft 3 drives the power wheel 41 to rotate. At this time, the track 4 located on the power wheel 41 starts to rotate and drives the rescue vehicle to travel on the road. When the road conditions are relatively good, the hydraulic system inside the rescue vehicle transports the oil to the first oil storage rod 6 through a hose. The oil entering the first oil storage rod 6 will push the first piston rod 61. When the first piston rod 61 moves, it will push the fixed column 541 to move the push rod 54. During the movement, the grounding wheel 53 will be pushed out of the placement groove 111 and the grounding wheel 53 will be unfolded. When the support rod 52 is perpendicular to the grounding wheel 53 and the rotating wheel 51, the hydraulic system stops delivering oil to the first oil storage rod 6, and the circular array of grounding wheels 53 supports the rescue vehicle body 1 and leaves the ground. When the power shaft 3 rotates, the rotating wheel 51 will be driven to rotate through the chain 31. When the rotating wheel 51 rotates, the ring-shaped array of grounding wheels 53 will roll on the ground to move the rescue vehicle. When the push rod 54 moves, it will push the grounding wheel 53 while making the slider 533 slide in the first slide groove 532 of the grounding wheel 53. When the support rod 52 is perpendicular to the grounding wheel 53 and the rotating wheel 51, when the push rod 5 When the grounding wheel 53 is pushed, the support rod 52 cannot continue to rotate because its rotation angle reaches the maximum. At this time, the resistance of the push rod 54 increases. After receiving the signal, the control system in the rescue vehicle body 1 stops the hydraulic system from delivering the oil to the first oil storage rod 6. At the same time, when the hydraulic system inside the rescue vehicle delivers the oil to the first oil storage rod 6 through the hose, part of the oil will enter the second oil storage rod 74 through the hose. When the oil enters the second oil storage rod 74, the entered oil will push the second piston rod 741. When the second piston rod 741 moves, it will pull the tooth plate 73. When the tooth plate 73 is pulled, the auxiliary shaft gear 72 meshed with the bottom of the tooth plate 73 starts to rotate. When the auxiliary shaft gear 72 rotates, , the auxiliary rod 71 starts to rotate. When the auxiliary rod 71 rotates, on the one hand, the auxiliary wheel 42 connected to the bottom of the auxiliary rod 71 will slide in the arc groove 112. On the other hand, the power wheel 41 connected to the top of the auxiliary rod 71 will move to the other end of the translation groove 113 under the action of the second slide groove 711 and the translation groove 113, and at the same time separate from the transmission gear 32. When the rescue vehicle needs to switch back to the track wheel movement mode, it only needs to extract the oil in the first oil storage rod 6 through the hydraulic system. When the oil in the first oil storage rod 6 is extracted, the first piston rod 61 will move in the opposite direction. On the one hand, it can make the push rod 54 move in the opposite direction, so that the grounding wheel 53 of the annular array gradually shrinks and returns to the placement groove 111.On the other hand, the oil in the second oil storage rod 74 will also be drawn out through the hose, and the second piston rod 741 will move in the opposite direction and push the toothed plate 73, so that the auxiliary shaft gear 72 will rotate in the opposite direction, and the auxiliary rod 71 will rotate in the opposite direction, so that the power wheel 41 and the auxiliary wheel 42 will be reset. At this time, the shaft gear on the power wheel 41 will mesh with the transmission gear 32 again. When the power shaft 3 rotates, it can drive the power wheel 41 to rotate and the crawler track 4 to rotate.

[0044] The present invention covers any substitution, modification, equivalent method and scheme made on the essence and scope of the present invention. In order to make the public have a thorough understanding of the present invention, specific details are described in detail in the following preferred embodiments of the present invention, but those skilled in the art can fully understand the present invention without the description of these details. In addition, in order to avoid unnecessary confusion about the essence of the present invention, well-known methods, processes, procedures, components and circuits are not described in detail.

[0045] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A wheel-track conversion rescue vehicle for disaster relief, characterized in that: The rescue vehicle comprises a rescue vehicle body, wherein a base is arranged in the rescue vehicle body, mud guards are fixedly connected to both sides of the top of the base, both ends of the mud guards are provided with fixing plates, and both sides of the base are provided with a group of power shafts, and the group of power shafts are respectively rotated at both ends of the base; The sprocket on the power shaft is connected to the roller assembly through a chain, crawlers are respectively provided on both sides of the base, the two ends of the top of the crawler are matched and connected with two symmetrically arranged power wheels, the two ends of the bottom of the crawler are matched and connected with two symmetrically arranged auxiliary wheels, a group of placement grooves are opened on both sides of the base, and the roller assembly is rotatably connected in the two symmetrically arranged placement grooves, one end of the roller assembly is rotatably connected to the first oil storage rod, one end of the first oil storage rod is connected to the hose of the hydraulic system in the rescue vehicle body, and the first oil storage rod is connected to the auxiliary assembly through the hose; The roller assembly is used to support the rescue vehicle body and enable the rescue vehicle body to travel on the road, and the auxiliary assembly is used to convert the rescue vehicle body into wheels and tracks; A group of translation grooves are opened on both sides of the top of the base, a group of arc grooves are opened on both sides of the bottom of the base, a shaft gear is arranged on one side of the power wheel, the shaft gear of the power wheel is rotatably connected in the translation groove, a connecting shaft is rotatably connected on one side of the auxiliary wheel, and the connecting shaft of the auxiliary wheel is slidably connected in the arc groove; The roller assembly comprises a rotating wheel, the rotating wheel is rotatably connected to a group of supporting rods in an annular array, one end of the supporting rod is rotatably connected to a grounding wheel, and one side of the grounding wheel is rotatably connected to a push rod; One side of the rotating wheel is rotatably connected to the fixed plate, and a rotating sprocket is provided on the rotating wheel, and the rotating sprocket is connected to the sprocket on the power shaft through a chain; A first rotating groove in an annular array is provided on the other side of the rotating wheel, one end of the supporting rod is rotatably connected to the first rotating groove, a second rotating groove is provided on one side of the grounding wheel, the other end of the supporting rod is rotatably connected to the second rotating groove; A first slide groove is provided on the other side of the ground wheel, a slider is slidably connected in the first slide groove, a push rod is rotatably connected to the slider, one end of the push rod is fixedly connected to a fixed column, one end of the fixed column is rotatably connected to one side of a connecting block, and the other side of the connecting block is fixedly connected to a first piston rod in the first oil storage rod; The auxiliary assembly comprises an auxiliary rod, one side of the auxiliary rod is fixedly connected to an auxiliary shaft gear, a toothed plate is meshedly connected to the auxiliary shaft gear, and one end of the toothed plate is fixedly connected to a second piston rod of a second oil storage rod; The bottom of the other side of the auxiliary rod is rotatably connected to an auxiliary wheel via a connecting shaft, and a second slide groove is provided on the top of the auxiliary rod, in which a shaft gear of a power wheel is rotatably connected; The second oil storage rod is connected to the first oil storage rod through a hose, the second oil storage rod is fixedly connected to the rescue vehicle body, and the toothed plate is slidably connected to the rescue vehicle body; One end of the power shaft is fixedly connected with a transmission gear, and the transmission gear is meshed with the shaft gear of the power wheel. One side of the transmission gear is provided with a power gear, and the power gear is meshed with the output gear of the power system in the rescue vehicle body.

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