rescue vehicles

Abstract

This invention discloses a rescue vehicle. The rescue vehicle includes a body, a boom, and a working device. The first end of the boom is rotatably connected to the body to adjust the boom's posture. The working device includes a switching arm and a suction device and a gripping device disposed at different positions on the switching arm. The switching arm is rotatably connected to the second end of the boom to allow the rescue vehicle to switch between a suction operation mode and a gripping operation mode. In the suction operation mode, the suction device is in the working position; in the gripping operation mode, the gripping device is in the working position. When performing a rescue, the rescue vehicle of this invention can first control the switching arm to move so that the gripping device reaches the working position to remove large pieces of material, and then control the switching arm to move so that the suction device reaches the working position to suction and remove the material at the working position, thereby improving rescue efficiency.

Description

Technical Field

[0001] This invention relates to engineering machinery, and more particularly to a rescue vehicle. Background Technology

[0002] For rescue operations involving the collapse of pipelines, foundation pits, and other construction projects, it is difficult to quickly remove the loose soil, gravel, mud, and other burial materials above the buried personnel. Rescue efforts can only be carried out by digging with bare hands and shoveling soil, resulting in low rescue efficiency and greatly affecting the speed of rescue. Summary of the Invention

[0003] This invention provides a rescue vehicle to improve rescue efficiency.

[0004] This invention provides a rescue vehicle, comprising:

[0005] Organism;

[0006] The boom, the first end of which is rotatably connected to the machine body to adjust the boom's attitude;

[0007] The working device includes a switching arm and a suction device and a gripping device disposed at different positions on the switching arm. The switching arm is rotatably connected to the second end of the boom to allow the rescue vehicle to switch between a suction operation mode and a gripping operation mode. In the suction operation mode, the suction device is in the working position; in the gripping operation mode, the gripping device is in the working position.

[0008] In some embodiments, the working device further includes a first link, a second link, and a switching drive mechanism. A first end of the first link is hinged to the boom, a second end of the first link is hinged to the first end of the second link, a second end of the second link is hinged to the switching arm, and the switching drive mechanism is configured to drive at least one of the first link and the second link to rotate so as to cause the switching arm to rotate relative to the boom.

[0009] In some embodiments, the switching drive mechanism is configured to hinge at the joint between the first link and the second link.

[0010] In some embodiments, the rescue vehicle also includes a suction hose that is gas-connected to a suction device and extends along and is attached to the boom.

[0011] In some embodiments, the rescue vehicle further includes at least one annular connector fitted over the outside of the suction hose, the annular connector being connected to the boom.

[0012] In some embodiments, the gripping device includes a base, a first gripper and a second gripper disposed opposite to each other, and a telescopic mechanism. A first end of the first gripper is rotatably connected to a first position of the base, and a first end of the second gripper is rotatably connected to a second position of the base. The two ends of the telescopic mechanism are respectively connected to the first gripper and the second gripper, and the length of the telescopic mechanism is extendable to drive the second ends of the first gripper and the second gripper to move closer to or further away from each other.

[0013] In some embodiments, the gripping device further includes a third link, the two ends of which are rotatably connected to the first gripper and the second gripper, respectively.

[0014] In some embodiments, the gripping device further includes a drive motor disposed at the bottom of the base, the drive motor being configured to drive the base to rotate about the centerline of the base.

[0015] In some embodiments, the boom includes at least two boom sections arranged sequentially, with two adjacent boom sections being rotatably connected.

[0016] In some embodiments, the rescue vehicle further includes a slewing mechanism mounted on the body, with a first end of the boom tiltable relative to the slewing mechanism, the slewing mechanism driving the boom to rotate about a vertical axis.

[0017] In some embodiments, the rescue vehicle also includes a video surveillance system positioned on the boom near the working device to monitor the operation in real time.

[0018] Based on the technical solution provided by this invention, a rescue vehicle includes a body, a boom, and a working device. The first end of the boom is rotatably connected to the body to adjust its posture. The working device includes a switching arm and suction and gripping devices disposed at different positions on the switching arm. The switching arm is rotatably connected to the second end of the boom, allowing the rescue vehicle to switch between suction and gripping modes. In suction mode, the suction device is in the working position; in gripping mode, the gripping device is in the working position. The rescue vehicle provided by this invention, by arranging suction and gripping devices at different positions on the switching arm, and with the switching arm rotatably connected to the boom, allows the suction and gripping devices at different positions to selectively reach the working position when the switching arm rotates relative to the boom, thus enabling the rescue vehicle to enter different working modes. During rescue operations, the switching arm can be controlled first to move the gripping device to the working position to remove large pieces of material, and then the switching arm can be controlled to move the suction device to the working position to suction and remove the material at the working position, thereby improving rescue efficiency.

[0019] Other features and advantages of the invention will become clear from the following detailed description of exemplary embodiments of the invention with reference to the accompanying drawings. Attached Figure Description

[0020] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings:

[0021] Figure 1 This is a partial structural diagram of a rescue vehicle according to an embodiment of the present invention.

[0022] Figure 2 for Figure 1 A schematic diagram of the suction device.

[0023] Figure 3 for Figure 1 A schematic diagram of the gripping device.

[0024] Figure 4 for Figure 1 The diagram shows the boom of the rescue vehicle in different positions.

[0025] Figure 5 for Figure 1 The diagram shows the boom of the rescue vehicle rotating under the drive of the slewing mechanism.

[0026] Figure 6 This is a schematic diagram of the structure of a rescue vehicle in suction operation mode according to an embodiment of the present invention.

[0027] Figure 7 This is a schematic diagram of the structure of a rescue vehicle in the grabbing operation mode according to an embodiment of the present invention. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0030] For ease of description, spatial relative terms such as "above," "over," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "above" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways, and the spatial relative descriptions used herein will be interpreted accordingly.

[0031] refer to Figure 1 , Figure 6 and Figure 7 The rescue vehicle provided in this embodiment of the invention includes a body 1, a boom, and a working device. A first end of the boom is rotatably connected to the body 1 to adjust its pitch attitude. The working device includes a switching arm 17 and a suction device 18 and a gripping device 19 disposed at different positions on the switching arm 17. The switching arm 17 is rotatably connected to a second end of the boom to allow the rescue vehicle to switch between a suction operation mode and a gripping operation mode. In the suction operation mode, the suction device 18 is in the operating position; in the gripping operation mode, the gripping device 19 is in the operating position.

[0032] The rescue vehicle provided in this embodiment of the invention has a suction device 18 and a gripping device 19 installed at different positions on a switching arm 17, and the switching arm 17 is rotatably connected to the boom. Thus, when the switching arm 17 rotates relative to the boom, the suction device 18 and the gripping device 19 located at different positions can selectively reach the working position, thereby allowing the rescue vehicle to enter different working modes. For example... Figure 6 As shown, when the suction device 18 reaches the working position, the rescue vehicle enters the suction operation mode, as follows: Figure 7 As shown, when the grabbing device 19 reaches the working position, the rescue vehicle enters the grabbing operation mode. For example, when carrying out a rescue, the switching arm 17 can be controlled to move so that the grabbing device 19 can reach the working position to remove large pieces of material. Then, the switching arm 17 can be controlled to move so that the suction device 18 can reach the working position to suction and remove the material at the working position, thereby improving the rescue efficiency.

[0033] like Figure 6 and Figure 7 As shown, the suction device 18 is disposed on the first side of the switching arm 17, and the gripping device 19 is disposed on the second side of the switching arm 17. The first side and the second side are arranged adjacent to each other and perpendicular to each other.

[0034] Specifically, such as Figures 1 to 3 As shown, the switching arm 17 includes a connecting seat and a connecting ring disposed on the connecting seat. The gripping device 19 is disposed on the connecting seat, and the suction device 18 is disposed on the connecting plate. Specifically, as... Figure 3 As shown, the connecting base is a triangular base, including a first side and a second side arranged opposite to and parallel to each other, a top surface connecting the upper ends of the first side and the second side, and an inclined bottom surface connecting the lower ends of the first side and the second side. The gripping device 19 is located on the top surface. A connecting ring is located on the lower side of the triangular base and is connected to the suction device 18.

[0035] like Figure 2 As shown, the suction device 18 includes a quick-connect flange joint 181, a quick-connect male end 182, a suction steel pipe 183, and a flexible suction head 184. The quick-connect flange joint 181 connects the connecting ring and the suction hose 3. The quick-connect male end 182 connects to the connecting ring, and the suction steel pipe 183 connects to the quick-connect male end 182. The flexible suction head 184 is positioned at the end of the suction steel pipe 183 to directly contact the work position, thereby avoiding secondary injury to buried personnel.

[0036] like Figure 3As shown, in some embodiments, the gripping device 19 includes a base 193, a first gripper portion 194 and a second gripper portion 195 disposed opposite to each other, and a telescopic mechanism. A first end of the first gripper portion 194 is rotatably connected to a first position on the base 193. A first end of the second gripper portion 195 is rotatably connected to a second position on the base 193. Both ends of the telescopic mechanism 197 are connected to the first gripper portion 194 and the second gripper portion 195, respectively. The length of the telescopic mechanism 197 is extendable to drive the second ends of the first gripper portion 194 and the second ends of the second gripper portion 195 closer together or further apart.

[0037] The first and second positions of the base 193 are located at the left and right ends of the base 193, respectively. The first gripper 194 is hinged to the first position, and the second gripper 195 is hinged to the second position. Thus, when the first gripper 194 and the second gripper 195 rotate around their respective hinge points, the free ends of the first gripper 194 and the free ends of the second gripper 195 move closer or further apart to achieve the gripping and release of materials.

[0038] In other embodiments not shown in the accompanying drawings, the gripping device may also be other structures, such as a robotic arm comprising multiple robotic fingers, which is more conducive to gripping smaller materials.

[0039] The first gripper and the second gripper have the same structure. In order to increase the volume and quantity of materials that the gripping device 19 can grip, specifically, both the first gripper and the second gripper include a groove-shaped structure, so that more material can be accommodated between the first gripper and the second gripper when gripping materials.

[0040] In some embodiments, the gripping device 19 further includes a third link 196, the two ends of which are rotatably connected to the first gripper portion 194 and the second gripper portion 195, respectively.

[0041] In some embodiments, the gripping device further includes a drive motor 191 disposed at the bottom of the base 193, the drive motor 191 being configured to drive the base 193 to rotate about the center line of the base.

[0042] To achieve the rotation of the switching boom 17 relative to the boom, such as Figure 4As shown, in some embodiments, the working device further includes a first link 161, a second link 162, and a switching drive mechanism 14. A first end of the first link 161 is hinged to the boom. A second end of the first link 161 is hinged to a first end of the second link 162. A second end of the second link 162 is hinged to the switching arm 17. The switching drive mechanism 14 is configured to drive at least one of the first link 161 and the second link 162 to rotate, thereby causing the switching arm 17 to rotate relative to the boom. Thus, when the switching drive mechanism 14 drives one of the first link 161 and the second link 162 to rotate, it causes the switching arm 17 to rotate, thereby allowing the suction device 18 and the gripping device 19 to selectively reach the working position.

[0043] In some embodiments, the switching drive mechanism 14 is configured to be hinged to the hinge point of the first link 161 and the second link 162. For example, the switching drive mechanism 14 may be a hydraulic cylinder, the cylinder barrel of which is connected to the boom, and the piston rod of which is hinged to the hinge point of the first link 161 and the second link 162. The piston rod extends and retracts to drive the first link 161 and the second link 162 to rotate.

[0044] In some embodiments, the rescue vehicle further includes a suction hose 3. The body 1 includes a tank. The suction hose 3 is gas-connected to a suction device 18. The suction hose 3 extends along the boom and is connected to the boom. The tank and the suction hose 3 are in gas communication to provide suction force to the suction hose 3, thereby enabling the suction of materials.

[0045] In some embodiments, the rescue vehicle further includes at least one annular connector 9 fitted over the outside of the suction hose 3. The annular connector 9 is connected to the boom. This allows the suction hose 3 to follow the posture of the boom.

[0046] In some embodiments, the boom includes at least two boom sections arranged sequentially. Two adjacent boom sections are rotatably connected. For example... Figure 4 As shown, the posture of each boom segment can be changed through control, thereby enabling the working device of the rescue vehicle in this embodiment of the invention to reach different working positions, thereby improving the operational flexibility of the rescue vehicle in this embodiment of the invention and expanding its applicability.

[0047] In some embodiments, the rescue vehicle further includes a slewing mechanism 4 mounted on the body 1, with the first end of the boom being pitchable relative to the slewing mechanism 4, and the slewing mechanism 4 driving the boom to rotate about a vertical axis.

[0048] In some embodiments, the rescue vehicle also includes a video surveillance system positioned on the boom near the working device to monitor the operation in real time.

[0049] The following is based on Figures 1 to 7The structure and working process of the rescue vehicle according to embodiments of the present invention will be described in detail.

[0050] like Figure 1 As shown, the rescue vehicle of this embodiment includes a tank, a boom, and a working device. A first end of the boom is connected to the tank, and a second end of the boom is connected to the working device. The working device includes a switching arm 17 and a suction device 18 and a gripping device 19 disposed at different positions on the switching arm 17. The switching arm 17 is rotatably connected to the second end of the boom to allow the rescue vehicle to switch between suction operation mode and gripping operation mode.

[0051] The boom includes a first boom section 6, a second boom section 11, and a third boom section 13. The second boom section 11 is rotatably connected to the first boom section 6, and the third boom section 13 is rotatably connected to the second boom section. A first folding cylinder 7 is used to drive the first boom section 6 to rotate, a second folding cylinder 8 is used to drive the second boom section 11 to rotate, and a third folding cylinder 12 is used to drive the third boom section 13 to rotate.

[0052] The quick-connect female connector 2 is connected to the suction hose 3 via a high-strength hose clamp. The quick-connect female connector 2 connects to the quick-connect male connector at the tank's inlet, enabling rapid pipeline connection and saving time. The slewing reducer 5 is bolted to the slewing mechanism 4 and fixed to the upper part of the tank. The first boom section 6 is hinged to the slewing mechanism 4 via a pin. The cylinder of the first folding cylinder 7 is connected to the lug of the slewing mechanism 4 via a pin, and the piston rod of the first folding cylinder 7 is connected to the lug seat at the bottom of the first boom section 6 via a pin, realizing the luffing function of the first boom section 6. The second boom section 11 is hinged to the first boom section 6 via a pin. At the same time, both ends of the connecting rod structure 10 are hinged to the first boom section 6 and the second boom section 11 via pins respectively. One end of the second folding cylinder 8 is connected to the lug seat of the first boom section 6 via a pin, and the other end is connected to the connecting rod structure 10 via a pin, enabling the second boom section 11 to achieve a wide range of luffing angles, which is beneficial for multi-angle luffing operations of the boom. The third boom section 13 is hinged to the second boom section 11 via a pin. One end of the third folding cylinder 12 is connected to the cylinder lug seat at the bottom of the second boom section 11 via a pin, and the other end is connected to the cylinder lug seat of the third boom section 13 via a pin, realizing the luffing function of the third boom section 13. The switching arm 17 is hinged to the third boom section 13 via a pin, and the two sides of the linkage mechanism 16 are respectively hinged to the pin holes of the third boom section 13 and the switching arm 17 via pins. One end of the switching drive mechanism 14 is connected to the lug of the third boom section 13 via a pin, and the other end is connected to the linkage mechanism 16 via a pin, realizing the rapid switching between suction operation mode and gripping operation mode through the multi-angle luffing of the switching cylinder. One side of the suction hose 3 is quickly connected to the male end of the quick-connect coupling on the tank via the female end of the quick-connect coupling, and the other side is quickly connected to the suction device 18. The hose is hung on the multi-functional boom via the annular connector 9. Meanwhile, the boom is equipped with a video monitoring system 15, which is placed on the third boom section 13 to monitor the rescue situation in real time and perform visual remote control operation to ensure the safety of the buried personnel.

[0053] like Figure 2 As shown, the suction device 18 includes a quick-connect flange joint 181, a quick-connect male end 182, a suction steel pipe 183, and a flexible suction head 184. The quick-connect flange joint 181 is bolted to the switching arm 17 and connected to the suction hose 3. The quick-connect male end 182 connects to the quick-connect female end of the suction steel pipe 183, enabling rapid connection of the suction steel pipe. The end of the suction steel pipe is equipped with a flexible suction head 184 to prevent secondary injury to buried personnel. The quick-connect suction steel pipe and flexible suction head shown in the figure are not limited to those shown in this figure. The suction device can also be equipped with other rescue devices such as a rotary suction assembly, with a modular suction configuration, connected to the suction end via quick-connect links to achieve rapid material suction.

[0054] like Figure 3As shown, the gripping device 19 includes a drive motor 191, a motor base 192, a base 193, a first gripper 194, a second gripper 195, a third link 196, and a telescopic mechanism 197. The drive motor 191 is fixed to the switching arm 17. The first gripper 194 and the second gripper 195 are respectively connected to the base 193 via pins. One end of the third link 196 is connected to the first gripper 194, and the other end is connected to the second gripper 195. One end of the telescopic mechanism 197 is connected to the first gripper 194 via a pin, and the other end is connected to the second gripper 195 via a pin. The opening and closing of the gripping device is achieved through the linkage between the telescopic mechanism 197 and the third link 196. The lower part of the motor base 192 is connected to the output shaft of the drive motor 191 via a pin, and the upper part is connected to the base 193 via bolts. The drive motor 191 drives the gripper device to achieve 360° rotation through the motor base 192. The gripping angle is adjusted in real time according to the actual working conditions and the position of the material to achieve rapid material gripping.

[0055] The boom of the rescue vehicle of this invention can be remotely rotated and tilted for precise positioning operations at multiple angles and directions. Furthermore, the rescue vehicle is equipped with a visual video monitoring system to monitor the rescue situation in real time, enabling visual remote control operation and ensuring the safety of those buried. Simultaneously, the boom can be remotely switched according to rescue needs, flexibly switching between suction and grabbing operations to quickly remove loose soil, rubble, and large pieces of material from the collapsed area, shortening rescue time and improving the efficiency of ditch collapse rescue.

[0056] Figure 4 The diagram illustrates the boom's multi-angle, multi-posture, and multi-directional operation. After the vehicle arrives at the rescue site, the slewing reducer is controlled by a remote control for rotation, with real-time video feedback from the video monitoring system. Upon reaching the designated working position, the folding cylinder and switching cylinder are remotely operated, while the boom reaches the designated suction position for suction operations, with real-time video feedback from the video monitoring system. The working angle is adjusted in real-time according to the video monitoring system, and the boom cylinders are remotely operated to switch between suction and grabbing operations, quickly removing materials from the collapsed area and gaining valuable time for the rescue.

[0057] Figure 5 The diagram shows the boom's long-distance operating radius and large-angle operating range. Without moving the work vehicle, the boom can be remotely controlled to achieve a wide-area rescue. The large operating range can quickly locate and support the removal of materials from the collapsed area.

[0058] The specific operating modes can be divided into suction operation mode, grabbing operation mode, and combined operation mode. The specific implementation methods are as follows:

[0059] Figure 6The suction operation mode is shown as follows: After the vehicle arrives at the ditch at the rescue site, the slewing reducer is remotely operated to rotate. Based on the real-time feedback from the video monitoring system installed on the third boom section, the slewing reducer drives the boom to directly above the buried area. Then, according to the rescue height and the distance between the rescue location and the vehicle, the first, second, and third folding cylinders are remotely operated respectively. At this time, the first, second, and third boom sections follow the movement of the folding cylinders to reach the designated positions. After the boom is adjusted according to the feedback from the video monitoring system, the drive mechanism 14 is remotely switched again to adjust the suction angle and begin the suction operation. The suction angle and suction range are adjusted in real time with the help of the video monitoring system to achieve material suction and removal.

[0060] Figure 7 The grabbing operation mode is shown as follows: After the vehicle arrives at the ditch at the rescue site, the boom slewing reducer is remotely operated to rotate. Based on the real-time feedback from the video monitoring system on the third boom section, the boom slewing reducer drives the boom to directly above the buried area. Then, according to the rescue height and the distance between the rescue location and the vehicle, the first, second, and third folding cylinders are remotely operated. At this time, the first, second, and third boom sections follow the movement of the folding cylinders to reach the designated positions. After the boom is adjusted according to the feedback from the video monitoring system, the drive mechanism 14 is remotely switched again to adjust the grabbing angle. Then, the grabbing arm rotation motor is driven to adjust the grabbing angle, and the manipulator cylinder is closed to grab the material. After the material is grabbed, the boom slewing reducer is remotely operated to rotate and place the material in a safe and designated position. Then, the manipulator cylinder is opened, and after the material falls, the boom is remotely operated to rotate back to the rescue site to repeat the above operation. With the help of the video monitoring system, the grabbing angle range is adjusted in real time to achieve material grabbing and removal.

[0061] Combination Figure 6 and Figure 7The joint operation is illustrated as follows: After the vehicle arrives at the ditch at the rescue site, the boom slewing reducer is remotely operated to rotate. Then, based on the rescue height and the distance between the rescue location and the vehicle, the first, second, and third folding cylinders are remotely operated. At this time, the first, second, and third boom sections follow the movement of the folding cylinders to reach the designated positions. After the boom angle is adjusted according to the feedback from the video monitoring system, the drive mechanism 14 is remotely switched again to adjust the gripping angle. The gripping arm rotation motor is then driven to adjust the gripping angle, and the manipulator cylinder is closed to grip the material. After the material is gripped, the boom slewing reducer is remotely operated to rotate and place the material in a safe designated position. Then, the manipulator cylinder is opened, and after the material falls, the boom is remotely operated to rotate back to the rescue site to repeat the above operation. The gripping angle range is adjusted in real time with the help of the video monitoring system to remove large pieces of material completely. Then, the luffing cylinder is remotely operated to switch to the suction operation mode. After adjusting the suction angle according to the video monitoring system, the suction operation is carried out to remove the buried material. The above joint operation sequence is not limited to one of the above methods. In actual operation, depending on the site conditions, material can be grabbed and suctioned alternately. By switching between hydraulic cylinders and a video monitoring system, material can be removed quickly. Specific implementation details will not be elaborated further.

[0062] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of the present invention or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solutions of the present invention, and all such modifications and substitutions should be covered within the scope of the technical solutions claimed in the present invention.

Claims

1. A rescue vehicle, characterized in that, include: Body (1); A boom, the first end of which is rotatably connected to the body (1) to adjust the posture of the boom; The working device includes a switching arm (17) and a suction device (18) and a gripping device (19) disposed at different positions on the switching arm (17). The suction device (18) is disposed on a first side of the switching arm (17), and the gripping device (19) is disposed on a second side of the switching arm (17). The first side and the second side are adjacent to each other and perpendicular to each other. The rescue vehicle also includes a suction hose (3), which is gas-connected to the suction device (18), and the suction hose (3) extends along the boom and is connected to the boom. The switching arm (17) is rotatably connected to the second end of the boom to allow the rescue vehicle to switch between a suction operation mode and a grab operation mode. In the suction operation mode, the suction device (18) is in the operating position; in the grab operation mode, the grab device (19) is in the operating position. The rescue vehicle also has a combined operation mode, which controls the grabbing device (19) and the suction device (18) to work alternately.

2. The rescue vehicle according to claim 1, characterized in that, The working device further includes a first link (161), a second link (162), and a switching drive mechanism (14). The first end of the first link (161) is hinged to the boom, the second end of the first link (161) is hinged to the first end of the second link (162), the second end of the second link (162) is hinged to the switching arm (17), and the switching drive mechanism (14) is configured to drive at least one of the first link (161) and the second link (162) to rotate so as to drive the switching arm (17) to rotate relative to the boom.

3. The rescue vehicle according to claim 2, characterized in that, The switching drive mechanism (14) is configured to hinge at the joint of the first link (161) and the second link (162).

4. The rescue vehicle according to claim 1, characterized in that, The rescue vehicle also includes at least one annular connector (9) fitted on the outside of the suction hose (3), the annular connector (9) being connected to the boom.

5. The rescue vehicle according to claim 1, characterized in that, The gripping device (19) includes a base (193), a first gripper (194) and a second gripper (195) arranged opposite to each other, and a telescopic mechanism. The first end of the first gripper (194) is rotatably connected to a first position of the base (193), and the first end of the second gripper (195) is rotatably connected to a second position of the base (193). The two ends of the telescopic mechanism (197) are respectively connected to the first gripper (194) and the second gripper (195), and the length of the telescopic mechanism (197) is extendable to drive the second ends of the first gripper (194) and the second gripper (195) to move closer or further away from each other.

6. The rescue vehicle according to claim 5, characterized in that, The gripping device (19) further includes a third link (196), the two ends of which are rotatably connected to the first gripper (194) and the second gripper (195), respectively.

7. The rescue vehicle according to claim 5, characterized in that, The gripping device also includes a drive motor (191) disposed at the bottom of the base (193), the drive motor (191) being configured to drive the base (193) to rotate about the center line of the base.

8. The rescue vehicle according to any one of claims 1 to 7, characterized in that, The boom includes at least two boom sections arranged sequentially, with two adjacent boom sections being rotatably connected.

9. The rescue vehicle according to any one of claims 1 to 7, characterized in that, The rescue vehicle also includes a slewing mechanism (4) mounted on the body (1). The first end of the boom is tilted relative to the slewing mechanism (4), and the slewing mechanism (4) drives the boom to rotate around a vertical axis.

10. The rescue vehicle according to any one of claims 1 to 7, characterized in that, The rescue vehicle also includes a video monitoring system, which is positioned on the boom near the working device to monitor the operation in real time.

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