A rescue vehicle

Abstract

The present application relates to the technical fields of vehicle trolley, and specifically provides a rescue vehicle, which comprises a seat, wheels arranged on both sides of the end of the seat, a backrest rotatably connected to the surface of the seat, and a towing frame rotatably connected to the center position of the side of the backrest away from the seat, wherein the end of the towing frame away from the backrest is detachably connected with a binding mechanism wound around the waist of a driver, and the towing frame can be deflected with the rotation connecting point as the center to tow the binding mechanism to keep in a set position, the cooperation of the towing frame and the binding mechanism can match the driver, and when the waist of the driver is fixed with the binding mechanism, the towing frame is deflected with the rotation connecting point as the center to keep the binding mechanism in the set position, so that drivers with different heights can drive the rescue vehicle to move, and if the rescue vehicle is not needed, the backrest and the seat are driven to be parallel to each other to complete folding.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of vehicle trolley, in particular to a rescue trolley. BACKGROUND

[0002] The rescue escape trolley can transport the wounded more quickly, and can carry the corresponding first-aid instruments, so as to gain time for escape and rescue as much as possible.

[0003] In the prior art, a patent document with the application number CN201410270926.2 discloses a novel cement pole transport vehicle. A support frame is arranged at the bottom of the vehicle frame. The support frame is provided with a rotating shaft penetrating through the bottom thereof. The rotating shaft is connected with wheels at both ends. A U-shaped fixing buckle is arranged on the upper side of one side of the vehicle frame through a shaft pin. A bracket is arranged on the other side. The other end of the U-shaped fixing buckle is fixed on the vehicle frame through a fixing bolt. The bracket and the U-shaped fixing buckle are arranged on the vehicle frame on one side. The above arrangement makes the overall structure simple and small in size, which facilitates the transportation of cement poles in mountainous areas, fields and other places. The use of the vehicle not only saves manpower and improves transportation efficiency, but also is safer and more reliable than manual lifting.

[0004] Although the above patent improves the transportation efficiency, it has limitations in actual operation. Because the heights of human bodies are different, the driver needs to match the vehicle during driving. If the driver is short, the center of gravity of the vehicle tends to move to the side of the driver, resulting in more force on the driver. If the driver does not drive, the vehicle frame is difficult to fold, resulting in a large size of the vehicle, which makes it difficult to transport and carry the vehicle.

[0005] Therefore, there is an urgent need for a rescue trolley to solve the problem of large size during non-use, which makes transportation difficult, and the problem of mismatch with the driver during use. SUMMARY

[0006] The present application provides a rescue trolley, which aims to solve the problem of large size during non-use, which makes transportation difficult, and the problem of mismatch with the driver during use.

[0007] The technical scheme adopted by the present application to solve the technical problem is as follows: a rescue trolley, comprising

[0008] a seat, both sides of the end of the seat are provided with wheels;

[0009] a backrest, the backrest is rotatably connected to the surface of the seat, and when the backrest and the seat form a set angle, the backrest and the seat are in parallel or form a lying space for carrying the rescued personnel;

[0010] The traction frame is rotationally connected to the center of the backrest away from the seat, and the end of the traction frame away from the backrest is detachably connected with the binding mechanism wound around the driver's waist, and the traction frame can be deflected around the rotationally connected point to keep the binding mechanism in the set position.

[0011] Preferably, the traction frame comprises a shock absorber, a following column and a base fixed to the backrest, the base is provided with a straight column, the following column is connected to the straight column through the shock absorber, and the shock absorber can reduce the impact force applied by the backrest to the following column;

[0012] The end of the following column away from the shock absorber is provided with a connector, the connector comprises a female head fixed to the vest worn by the driver and a male head fixed to the end of the following column away from the shock absorber, and the male head is movably connected with the female head.

[0013] Preferably, the shock absorber comprises a first connecting block sleeved on the side wall of the straight column and a second connecting block fixed to the end of the following column close to the backrest, the first connecting block and the second connecting block are detachably connected at the opposite ends, an elastic cover is arranged between the first connecting block and the second connecting block, and the two ends of the elastic cover are fixedly connected with the first connecting block and the second connecting block respectively.

[0014] Preferably, the elastic cover comprises a pair of half covers, the pair of half covers can cover the opposite ends of the first connecting block and the second connecting block after being spliced, and the surface of the half cover is provided with a buffer groove.

[0015] Preferably, the following column comprises a straight displacement part and a left-right turning part, and the straight displacement part and the left-right turning part are fixedly connected;

[0016] The straight displacement part comprises a fixed cover fixedly connected with the second connecting block, a linear sensor is mounted on the inner wall of the end of the fixed cover close to the second connecting block, a cross link set is connected to the side of the linear sensor away from the linear sensor, a telescopic rod is connected to the end of the cross link set away from the linear sensor, and the telescopic rod can reciprocate in the fixed cover along the direction parallel to the axis of the telescopic rod;

[0017] The left-right turning part comprises a limiting cover arranged at the end of the telescopic rod away from the fixed cover, the limiting cover is provided with a deflection groove at the end away from the telescopic rod, a swing rod fixedly connected with the male head is rotationally arranged in the deflection groove, and a pair of sensors are arranged on the inner side wall of the deflection groove, and the pair of sensors are symmetrically arranged about the center line of the edge in the width direction of the swing rod.

[0018] Preferably, an elastic column is arranged in the fixed cover, and the elastic column can reduce the impact force from the backrest when the telescopic rod slides into the fixed cover.

[0019] As preferred, the support frame is rotationally connected to one end of the seat away from the backrest, and the support frame can be deflected towards the side surface of the seat away from the backrest until the support frame is parallel to the seat.

[0020] As preferred, the backrest comprises a main body and a framework rotationally connected to the seat, the traction frame is installed on the framework, one end of the main body close to the seat is connected to the framework through an adjusting device, the adjusting device comprises a ratchet disc, a fixing frame, a ratchet and a lock tongue, the ratchet disc is arranged on the side wall of the main body close to the seat, the ratchet disc and the main body are connected to the framework through the same rotation shaft, and the ratchet disc and the main body can rotate around the rotation shaft at the same time; the fixing frame is fixedly installed on the surface of the seat and located on the side of the main body close to the traction frame; the ratchet is rotationally connected to the fixing frame through a transmission shaft, the ratchet can limit the position of the ratchet disc, and the lock tongue is rotationally connected to the fixing frame through a rotation column, the lock tongue can rotate around the rotation column and lock the ratchet after rotating to a certain position.

[0021] As preferred, the side wall of the ratchet disc is provided with a connecting piece detachably connected to the main body, and a plurality of tooth grooves are arranged on the ratchet disc; a tooth head embedded in the tooth groove is arranged on the ratchet, and a clamping groove is arranged at one end of the ratchet away from the tooth groove; the lock tongue has a locking head matched with the clamping groove, and the locking head is embedded in the clamping groove after the lock tongue rotates to a certain position around the rotation column.

[0022] The present application has the advantages that the present application can realize the matching with the driver through the cooperation of the traction frame and the binding mechanism, specifically, when the waist of the driver is fixed with the binding mechanism, the traction frame is deflected around the rotation connection point to pull the binding mechanism to keep at the set position, so that the driver of different heights can drive the rescue vehicle to move; if the rescue vehicle is not needed, the backrest and the seat are driven to be parallel, at this time, the whole vehicle is folded, and the overall size is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0023] The present application will be further described below in combination with the drawings and examples.

[0024] Figure 1 is the overall structure schematic diagram of the present application;

[0025] Figure 2 is the half cover structure schematic diagram in the present application;

[0026] Figure 3 is the elastic column structure schematic diagram in the present application;

[0027] Figure 4 is the structure schematic diagram of the female head and the male head when they are about to be inserted;

[0028] Figure 5is a structural schematic diagram of the rescue vehicle in the application when folded;

[0029] Figure 6 is a structural schematic diagram of the support frame in the application when unfolded;

[0030] Figure 7 is Figure 6 a structural schematic diagram of A in the application;

[0031] Figure 8 is a structural schematic diagram of the ratchet disc in the application;

[0032] Figure 9 is a structural schematic diagram of the locking tongue in the application.

[0033] The drawings show that the rescue vehicle comprises a seat 1, a backrest 2, a towing frame 3, a shock absorber 4, a base 5, a straight column 6, a female head 7, a male head 8, a first connecting block 9, a second connecting block 10, a half cover 11, a buffer groove 12, a fixed cover 13, a straight line sensor 14, a cross-link group 15, an extension rod 16, a limiting cover 17, a deflection groove 18, a swing rod 19, a locking head 20, an elastic column 21, a support frame 22, a framework 23, a main body 24, a ratchet disc 25, a fixing frame 26, a ratchet tooth 27, a locking tongue 28, a connecting piece 29, a tooth groove 30, a tooth head 31, and a clamping groove 32. DETAILED DESCRIPTION

[0034] Embodiments of the application are described in detail below with reference to the accompanying drawings, in which the same or similar elements or elements having the same or similar functions are denoted throughout by the same or similar reference numerals. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the application, and cannot be understood as limiting the application.

[0035] As shown in Figures 1 to 9 , the application provides an embodiment of a rescue vehicle.

[0036] Specifically, the rescue vehicle comprises

[0037] a seat 1, both sides of the end of the seat 1 are provided with wheels;

[0038] a backrest 2, the backrest 2 is rotationally connected to the surface of the seat 1, when the backrest 2 and the seat 1 form a set angle, the backrest 2 and the seat 1 are in a parallel state or form a lying space for carrying the rescued personnel;

[0039] a towing frame 3, the towing frame 3 is rotationally connected to the center position of the side of the backrest 2 away from the seat 1, one end of the towing frame 3 away from the backrest 2 can be detachably connected with a binding mechanism wound around the waist of the driver, and the towing frame 3 can be deflected around the rotational connection point to keep the binding mechanism in a set position.

[0040] Specifically refer to Figure 4 And Figure 5 The binding mechanism can be selected from a belt or a vest, and the vest is preferred in the application. The angle is set to be between 0-180 degrees, which is selected according to the requirements. The set position is the waist of the driver. Only when the set position is the waist, the force used by the driver to pull the seat 1 is the smallest.

[0041] The application realizes the matching with the driver through the cooperation of the traction frame 3 and the binding mechanism. Specifically, when the driver's waist is fixed with the binding mechanism, the traction frame 3 is directly deflected with the rotating connection point as the center to pull the binding mechanism to remain at the set position, so that drivers of different heights can pull the rescue vehicle to move. If the rescue vehicle is not needed, the backrest 2 and the seat 1 are driven to be in a parallel state, at which time the whole trolley is folded, reducing the overall size.

[0042] Since the wounded person is lying on the backrest 2 and the seat 1, when the wounded person is in the lying space, if the seat 1 passes through an area with a high drop, a large shock is easy to occur, causing the backrest 2 to apply a certain impact force to the following column, thereby affecting the driver's waist. Therefore, in view of this problem, the application further limits the traction frame 3. The traction frame 3 includes a shock absorber 4, a following column, and a base 5 fixedly connected with the backrest 2. The base 5 is provided with a straight column 6. The following column is connected with the straight column 6 through the shock absorber 4. The shock absorber 4 can slow down the impact force applied by the backrest 2 to the following column. The end of the following column away from the shock absorber 4 is provided with a connector. The connector includes a female head 7 fixedly connected with the vest worn by the driver and a male head 8 fixedly connected with the end of the following column away from the shock absorber 4. The male head 8 is movably connected with the female head 7.

[0043] The shock absorber 4 includes a first connecting block 9 sleeved on the side wall of the straight column 6 and a second connecting block 10 fixedly connected with the end of the following column close to the backrest 2. The first connecting block 9 and the second connecting block 10 are detachably connected at the opposite ends. An elastic cover is arranged between the first connecting block 9 and the second connecting block 10. The two ends of the elastic cover are fixedly connected with the first connecting block 9 and the second connecting block 10 respectively.

[0044] The elastic cover includes a pair of half covers 11. The pair of half covers 11 can cover the opposite ends of the first connecting block 9 and the second connecting block 10 after being spliced. The surface of the half cover 11 is provided with a buffer groove 12.

[0045] In this embodiment, in order to further reduce the vibration received by the seat 1, a damping mechanism can be arranged at the wheels of the seat 1. For example, reference can be made to the patent document with the application number CN202121567073.0, which discloses a suspension damping device of an AGV trolley.

[0046] In the present application, the male head 8 and the female head 7 are connected in the following ways: threaded connection, plug-in connection, and bayonet connection (for example, the male head 8 is a cylindrical plug with a card slot in the present application. The male head 8 can be easily inserted into the female head 7, and the elastic card inside the female head 7 will be clamped into the card slot of the male head 8, thereby completing the connection of the two. The unlocking process is to pull the unlocking pull rope placed on the vest. The unlocking pull rope can pull the elastic card out of the card slot. When pulling, the elastic sheet inside the female head 7 opens and comes out of the card slot of the male head 8, thereby completing the separation of the driver and the vehicle).

[0047] Specifically, after the driver wears the vest, the male head 8 and the female head 7 are directly connected. Then, the driver can move the wounded person in the lying space by walking. If the seat 1 passes through an area with a high drop, it is easy to cause a large shock, so that the backrest 2 will exert a certain impact force on the following column. At this time, the two half covers 11 will reduce the buffer through elastic deformation, so that the driver's back will not be greatly affected.

[0048] If some drivers are short, in order to make the driver more labor-saving when pulling the car, the following column includes a straight displacement part and a left-right turning part, and the straight displacement part and the left-right turning part are fixedly connected.

[0049] The straight displacement part includes a fixed cover 13 fixedly connected with the second connecting block 10. The inner wall of the end of the fixed cover 13 close to the second connecting block 10 is provided with a linear sensor 14. The side of the linear sensor 14 away from the linear sensor 14 is connected with a cross-linkage group 15. The end of the cross-linkage group 15 away from the linear sensor 14 is connected with an extension rod 16. The extension rod 16 can reciprocate in the fixed cover 13 along a direction parallel to the axis of the extension rod 16.

[0050] The structure of the cross-linkage group 15 can refer to Figure 3 which is composed of a plurality of links connected in sequence and in X shape.

[0051] The left-right turning part includes a limiting cover 17 arranged at the end of the extension rod 16 away from the fixed cover 13. The end of the limiting cover 17 away from the extension rod 16 is provided with a deflection groove 18. The deflection groove 18 is rotatably provided with a swing rod 19 fixedly connected with the male head 8. The inner side wall of the deflection groove 18 is provided with a pair of sensors (the sensors can be selected as induction sensors). The pair of sensors are symmetrically arranged about the center line of the edge of the swing rod 19 in the width direction.

[0052] An elastic column 21 is arranged in the fixed cover 13. The elastic column 21 can slow down the impact force from the backrest 2 when the extension rod 16 slides into the fixed cover 13. A straight column 6 with a spring can be selected. Specifically, a sliding block can be arranged at the end of the extension rod 16, and the straight column 6 is arranged through the sliding block. When the sliding block slides, the sliding block will slide along the straight column 6 and compress the spring.

[0053] The linear sensor 14 and the inductive sensor can be selected from the sensors in the prior art, which are the prior art and thus will not be described in detail.

[0054] In this embodiment, a motor and a connecting rod can be installed on the wheels to drive the two wheels to move, so that the rescue vehicle can move more easily.

[0055] When the driver is moving, once the driver moves left and right, the swing rod 19 will also be deflected, and then the inductive sensor in the deflection groove 18 is triggered. At this time, the inductive sensor will transmit a signal to the vehicle central control system, so as to determine whether the vehicle turns left or right, thereby controlling the action of the wheels (the mechanism of the turning of the wheels can refer to the structure of the turning of the wheels in the prior art, which will not be described in detail here, and the turning mechanism and the inductive sensor can also not be provided and can be driven by the driver). When the person pulling the vehicle is moving forward, the swing rod 19 will pull the limiting cover 17 and the telescopic rod 16 in turn, at this time the telescopic rod 16 will extend outward and stretch the cross connecting rod group 15, at this time the linear inductive sensor is triggered, and the inductive signal is transmitted to the central control system, at this time the wheels will get the instruction to move forward; conversely, when the person pulling the vehicle suddenly stops, the telescopic rod 16 will be retracted inward, at the same time the buffer spring is compressed and the sensor is triggered, at this time the vehicle will slow down or brake. The existence of the elastic column 21 avoids the impact of the inertia of the vehicle on the human body.

[0056] The support frame 22 is rotationally connected to the end of the seat 1 away from the backrest 2, and the support frame 22 can be deflected towards the side surface of the seat 1 away from the backrest 2 until the support frame 22 is parallel to the seat 1.

[0057] The support frame 22 can serve to support the legs of the injured person, and the support frame 22 can also be deflected towards the side surface of the seat 1 away from the backrest 2, thereby achieving the purpose of folding.

[0058] In order to reduce the gravity center and make the force applied by the backrest 2 on the following column smaller, the backrest 2 comprises a main body 24 and a framework 23 rotatably connected with the seat 1, and the traction frame 3 is installed on the framework 23. The end of the main body 24 close to the seat 1 is connected with the framework 23 through an adjusting device. The adjusting device comprises a ratchet disc 25, a fixing frame 26, a ratchet tooth 27 and a lock tongue 28. The ratchet disc 25 is arranged on the side wall of the end of the main body 24 close to the seat 1. The ratchet disc 25 and the main body 24 are connected with the framework 23 through the same rotating shaft, and the ratchet disc 25 and the main body 24 can rotate simultaneously around the rotating shaft. The fixing frame 26 is fixedly installed on the surface of the seat 1 and located on the side of the main body 24 close to the traction frame 3. The ratchet tooth 27 is rotatably connected with the fixing frame 26 through a transmission shaft. The ratchet tooth 27 can limit the position of the ratchet disc 25. The lock tongue 28 is rotatably connected with the fixing frame 26 through a rotating column. The lock tongue 28 can rotate around the rotating column and lock the ratchet tooth 27 after rotating to a certain position.

[0059] In the embodiment, the two ends of the main body 24 are provided with the ratchet discs 25. Each ratchet disc 25 is provided with a ratchet tooth 27. The two ratchet teeth 27 are connected through a transmission shaft, as shown in the figure. Figure 6

[0060] The side wall of the ratchet disc 25 is provided with a connecting piece 29 (a screw or a clamping block in the prior art (the clamping block is a connecting piece. The side edge thereof is provided with a ratchet wheel. A rotating shaft penetrates the middle part. The clamping block can also clamp the main body 24) which is detachably connected with the main body 24. The ratchet disc 25 is provided with a plurality of tooth grooves 30. The ratchet tooth 27 is provided with a tooth head 31 embedded in the tooth groove 30. The end of the ratchet tooth 27 away from the tooth groove 30 is provided with a clamping groove 32. The lock tongue 28 is provided with a locking head 20 matched with the clamping groove 32. When the lock tongue 28 rotates to a certain position around the rotating column, the locking head 20 is embedded in the clamping groove 32.

[0061] Specifically, the operation of further preventing the driver's back from being impacted by adjusting the gravity center is as follows: the lock tongue 28, the ratchet tooth 27 and the ratchet disc 25 are matched to realize the rapid adjustment of the main body 24, so that the gravity center can be rapidly reduced after the rescue trolley is loaded with people. Specifically, the ratchet tooth 27 is locked by the lock tongue 28, and the ratchet disc 25 is locked by the ratchet tooth 27. If the rescue trolley is loaded with people at this time, the lock tongue 28 or the ratchet tooth 27 can be opened according to the actual situation.

[0062] ​When it is necessary to unlock the ratchet 27, the driving bolt 28 rotates around the rotating column until the locking head 20 disengages from the locking groove 32. At this time, the locking head 20 no longer applies pressure to the ratchet 27, and the ratchet 27 can move, allowing the ratchet disc 25 to move in one direction, which means that the main body 24 can also move in one direction. When it is necessary to lock the ratchet 27, the locking bolt 28 rotates around the rotating column until the locking head 20 is inserted into the locking groove 32. At this time, the locking head 20 applies pressure to the ratchet 27, and the ratchet 27 cannot move. When the ratchet disc 25 rotates, it cannot rotate normally due to the restriction of the ratchet 27. Then, if the unlocking handle is pressed (the unlocking handle is located at the end of the drive shaft, see reference), the ratchet 27 can be unlocked. Figure 9 When the ratchet 27 disengages from the locking slot 32, the ratchet disc 25 can rotate freely, meaning the main body 24 can also move freely, causing the injured person's center of gravity to move closer to the bottom of the wheel.

[0063] When the latch 28 is open, the ratchet 27 engages the ratchet disc 25, allowing the main body 24 to be adjusted clockwise. When the latch 28 is engaged, the main body 24 cannot be adjusted. The main body 24 can be adjusted in one or multiple positions at a time, but cannot be adjusted in the opposite direction when locked. Only when the unlock handle is pressed can the main body 24 be adjusted counterclockwise.

[0064] Specifically, in actual operation, the backrest 2 and seat 1 are first opened to a set angle. Then, the injured person lies on the backrest 2 and seat 1. At the same time, the driver puts on a vest and then directly inserts the male head 8 and female head 7. During the insertion process, the follower column is moved to guide the follower column to deflect around the straight column 6 as the rotation center so that the male head 8 and female head 7 can be inserted normally. After that, the driver can walk to move the injured person in the lying space. If the seat 1 passes through an area with a high drop, it is easy to have a large shock, which will cause the backrest 2 to exert a certain impact force on the follower column. At this time, the two half-covers 11 will reduce the cushioning through elastic deformation, so that the driver's back will not be greatly affected.

[0065] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0066] With the above ideal embodiments according to the present application as the inspiration, through the above description, relevant staff can make various changes and modifications without deviating from the technical idea of the present application. The technical scope of the present application is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims

1. A rescue vehicle, characterized in that The utility model relates to a kind of rescue vehicle, including Vehicle seat (1), both sides of the end of the vehicle seat (1) are provided with wheels; Backrest (2), the backrest (2) is rotatably connected on the surface of vehicle seat (1), when backrest (2) is at a set angle with vehicle seat (1), backrest (2) and vehicle seat (1) are parallel or form a lying space for carrying rescued personnel; Traction frame (3), the traction frame (3) is rotatably connected in the center position of the side of backrest (2) away from vehicle seat (1), one end of the traction frame (3) away from backrest (2) can be detachably connected with the binding mechanism wound around the waist of driver, and the traction frame (3) can be deflected with the rotation connection point as center to pull the binding mechanism to keep in set position; The traction frame (3) includes shock absorber (4), follow-up column and base (5) fixedly connected with backrest (2), the base (5) is provided with straight column (6), The shock absorber (4) includes first connecting block (9) sleeved on the side wall of straight column (6) and second connecting block (10) fixedly connected with the end of follow-up column close to backrest (2), The follow-up column includes straight line displacement part and left-right steering part, and the straight line displacement part and the left-right steering part are fixedly connected; The straight line displacement part includes fixed cover (13) fixedly connected with second connecting block (10), the inner wall of one end of fixed cover (13) close to second connecting block (10) is provided with linear sensor (14), one side of linear sensor (14) is connected with cross-linkage group (15), one end of cross-linkage group (15) away from linear sensor (14) is connected with telescopic rod (16), and the telescopic rod (16) can reciprocate in fixed cover (13) along the direction parallel to the axis of telescopic rod (16); The left-right steering part includes limit cover (17) arranged at the end of telescopic rod (16) away from fixed cover (13), the end of limit cover (17) away from telescopic rod (16) is provided with deflection groove (18), the deflection groove (18) is rotatably provided with swing rod (19) fixedly connected with male head (8), and the inner side wall of deflection groove (18) is provided with a pair of sensors, and the pair of sensors are symmetrically arranged about the center line of the edge in the width direction of swing rod (19).

2. The rescue vehicle of claim 1, wherein: The follow-up column is connected with straight column (6) through shock absorber (4), and the shock absorber (4) can slow down the impact force applied by backrest (2) to follow-up column; The end of follow-up column away from shock absorber (4) is provided with connector, the connector includes female head (7) fixedly connected with the vest worn by driver and male head (8) fixedly connected with the end of follow-up column away from shock absorber (4), and the male head (8) is movably connected with female head (7).

3. The rescue vehicle of claim 2, wherein: The first connecting block (9) and the second connecting block (10) are detachably connected at opposite ends, and an elastic cover is arranged between the first connecting block (9) and the second connecting block (10), and the two ends of the elastic cover are fixedly connected with the first connecting block (9) and the second connecting block (10) respectively.

4. The rescue vehicle of claim 3, wherein: The elastic cover comprises a pair of half covers (11) which can cover the ends of the first connecting block (9) and the second connecting block (10) after being spliced.

5. The rescue vehicle of claim 1, wherein: The fixing cover (13) is internally provided with an elastic column (21) which can slow down the impact force from the backrest (2) when the telescopic rod (16) slides into the fixing cover (13).

6. The rescue vehicle of claim 1 or 4, wherein: The vehicle seat (1) is rotatably connected with a support frame (22) at an end away from the backrest (2), and the support frame (22) can be deflected towards the side surface of the vehicle seat (1) away from the backrest (2) until the support frame (22) is parallel to the vehicle seat (1).

7. The rescue vehicle of claim 1, wherein: The backrest (2) comprises a main body (24) and a framework (23) rotatably connected with the vehicle seat (1), the traction frame (3) is installed on the framework (23), and the main body (24) is connected with the framework (23) through an adjusting device at an end close to the vehicle seat (1). The adjusting device comprises a ratchet disc (25), a fixing frame (26), a ratchet (27) and a lock tongue (28). The ratchet disc (25) is arranged on the side wall of the main body (24) close to the vehicle seat (1), the ratchet disc (25) and the main body (24) are connected with the framework (23) through the same rotating shaft, and the ratchet disc (25) and the main body (24) can rotate around the rotating shaft at the same time. The fixing frame (26) is fixedly installed on the surface of the vehicle seat (1) and located on the side of the main body (24) close to the traction frame (3). The ratchet (27) is rotatably connected with the fixing frame (26) through a transmission shaft, the ratchet (27) can limit the position of the ratchet disc (25), and the lock tongue (28) is rotatably connected with the fixing frame (26) through a rotating column, the lock tongue (28) can rotate around the rotating column and lock the ratchet (27) after being rotated to a certain position.

8. The rescue vehicle of claim 7, wherein: The side wall of the ratchet disc (25) is provided with a connecting piece (29) which is detachably connected with the main body (24), and a plurality of tooth grooves (30) are arranged on the ratchet disc (25). The ratchet (27) is provided with a tooth head (31) embedded in the tooth groove (30), and the end of the ratchet (27) away from the tooth groove (30) is provided with a clamping groove (32). The lock tongue (28) is provided with a locking head (20) matched with the clamping groove (32), and when the lock tongue (28) is rotated to a certain position around the rotating column, the locking head (20) is embedded in the clamping groove (32).

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