CN114457866A

CN114457866A - Cutting device and rescue vehicle

Info

Publication number: CN114457866A
Application number: CN202210121873.2A
Authority: CN
Inventors: 杨纯; 徐小东; 程晖; 周小浩; 高志刚; 张�浩
Original assignee: XCMG Fire Fighting Safety Equipment Co Ltd
Current assignee: XCMG Fire Fighting Safety Equipment Co Ltd
Priority date: 2022-02-09
Filing date: 2022-02-09
Publication date: 2022-05-10

Abstract

The invention relates to a cutting device and a rescue vehicle, wherein the cutting device comprises a frame (10), a mounting frame (20), a cutting wheel (30) and a driving system (40), the mounting frame (20) is swingably mounted on the frame (10), the cutting wheel (30) is rotatably mounted on the mounting frame (20), and the driving system (40) is configured to drive the cutting wheel (30) to rotate relative to the mounting frame (20). The cutting wheel is rotatably arranged relative to the mounting frame, the mounting frame can swing relative to the rack, when the cutting wheel is subjected to large impact force, the impact on the rack can be relieved through the swinging of the mounting frame relative to the rack, the damage to the rack is reduced, and the service lives of the rack and other components connected with the rack are prolonged.

Description

Cutting device and rescue vehicle

Technical Field

The invention relates to the technical field of rescue vehicles, in particular to a cutting device and a rescue vehicle.

Background

The rescue vehicle is mainly used for the tasks of collapse dredging, obstacle cleaning, stone breaking and the like, and the multifunctional machine tool configured by the operation arm can lift, dig, break, grab, cut and the like the obstacles.

However, the existing cutting saw of the emergency rescue vehicle adopts a single saw blade to cut, and only concrete can be cut. Moreover, the problems of easy heating, no lubrication, low efficiency and the like exist during cutting, and the reinforced concrete can not be cut, so that the cutting effect is not ideal and the rescue capability is poor.

In addition, in the actual cutting process, the cutting force is increased along with the increase of the cutting progress and the cutting depth, the impact force is relatively increased in the cutting process, and the vehicle body is easily subjected to large impact.

It is noted that the information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information constitutes prior art already known to a person skilled in the art.

Disclosure of Invention

The embodiment of the invention provides a cutting device and a rescue vehicle, which can effectively relieve the impact on a rack in the cutting process.

According to a first aspect of the present invention, there is provided a cutting device comprising:

a frame;

the mounting rack is arranged on the rack in a swinging way;

the cutting wheel is rotatably arranged on the mounting frame; and

a drive system configured to drive the cutting wheel in rotation relative to the mounting.

In some embodiments, the cutting device further comprises a limiting device for limiting the size of the angle of oscillation of the mounting frame relative to the frame.

In some embodiments, the limiting device comprises a limiting shaft mounted on the rack and a limiting hole arranged on the mounting rack, the limiting hole comprises an arc-shaped hole, and the limiting shaft is inserted into the arc-shaped hole and moves in the arc-shaped hole.

In some embodiments, the cutting device further comprises a resilient member disposed between the frame and the mounting bracket.

In some embodiments, the driving system comprises an oil source, a hydraulic pipeline, a hydraulic motor and a speed reducer, the hydraulic pipeline is connected between the oil source and the hydraulic motor, the hydraulic pipeline is installed on the rack, and the hydraulic motor and the speed reducer are in driving connection and are both installed on the mounting frame.

In some embodiments, the drive system further comprises a buffer valve group, wherein the buffer valve group is arranged on the hydraulic pipeline and used for relieving oil pressure on the hydraulic pipeline.

In some embodiments, the buffer valve group comprises a first overflow valve, a second overflow valve, a first check valve and a second check valve, the first overflow valve and the second overflow valve are connected in parallel between the inlet and the outlet of the hydraulic motor, the first check valve is connected between the first overflow valve and the inlet of the hydraulic motor, and the second check valve is connected between the second overflow valve and the outlet of the hydraulic motor.

In some embodiments, the drive system further comprises a directional valve disposed on the hydraulic line.

In some embodiments, the cutting device further comprises a transmission assembly, the cutting wheel comprises a first cutting wheel and a second cutting wheel, the transmission assembly is in driving connection with the driving system, and the transmission assembly is used for transmitting the driving force provided by the driving system to the first cutting wheel and the second cutting wheel respectively and enabling the first cutting wheel and the second cutting wheel to rotate in opposite directions.

According to a second aspect of the invention, a rescue vehicle is provided, comprising a cutting device as described above.

In some embodiments, the rescue vehicle further comprises a quick-connect coupling, the cutting device being connected to the quick-connect coupling.

In some embodiments, the rescue vehicle further comprises a wheel carrier, an arm support and a control device, wherein the wheel carrier is used for supporting the cutting device, the quick joint is connected with the arm support, and the control device is configured to drive the arm support to move relative to the wheel carrier so as to enable the quick joint to approach the cutting device and achieve connection.

Based on the technical scheme, the cutting wheel in the embodiment of the invention is not directly arranged on the frame, but the mounting frame is arranged between the frame and the cutting wheel, the cutting wheel is rotatably arranged relative to the mounting frame, and the mounting frame is configured to swing relative to the frame, so that when the cutting wheel is subjected to a large impact force, the impact on the frame is relieved through the swinging of the mounting frame relative to the frame, the damage to the frame is reduced, and the service life of the frame and other components connected with the frame is prolonged.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:

fig. 1 is a schematic structural view of some embodiments of the cutting device of the present invention.

Fig. 2 is a schematic partial structural view of some embodiments of the cutting device of the present invention.

Fig. 3 is a schematic diagram of a drive system of some embodiments of the cutting device of the present invention.

Fig. 4 is a partial structural schematic diagram of some embodiments of the rescue vehicle.

Fig. 5 is a schematic structural diagram of the wheel frame in some embodiments of the rescue vehicle.

In the figure:

10. a frame;

20. a mounting frame; 21. a rotating shaft; 22. a limiting shaft; 23. positioning pins; 24. an elastic member; 25. a limiting hole;

30. a cutting wheel; 31. a first cutting wheel; 32. a second cutting wheel; 33. a wheel sleeve; 34. a wear pad;

40. a drive system; 41. a hydraulic line; 411. a first hydraulic line; 412. a second hydraulic line; 413. a third hydraulic line; 414. a fourth hydraulic line; 42. a hydraulic motor; 43. a speed reducer; 44. a connecting bond; 45. a buffer valve group; 451. a first overflow valve; 452. a second overflow valve; 453. a first check valve; 454. a second one-way valve; 46. a source of oil; 47. a diverter valve;

50. a quick-connect joint;

60. a transmission assembly; 61. a first drive shaft; 62. a first drive pulley; 63. a second transmission wheel; 64. a third transmission wheel; 65. a second drive shaft; 66. a third drive shaft; 67. a bearing; 68. a shaft sleeve;

70. a telescopic arm; 71. a telescopic part; 72. a bucket rod; 80. a movable arm; 90. a wheel carrier; 91. a bearing part; 92. a support portion.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments. It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "central," "lateral," "longitudinal," "front," "rear," "left," "right," "upper," "lower," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings, which are based on the orientations and positional relationships indicated in the drawings, and are used for convenience in describing the present invention and to simplify the description, but are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore should not be construed as limiting the scope of the present invention.

In some embodiments of the cutting apparatus provided by the present invention, as shown in fig. 1, the cutting apparatus includes a frame 10, a mounting frame 20, a cutting wheel 30, and a drive system 40, the mounting frame 20 is swingably mounted on the frame 10, the cutting wheel 30 is rotatably mounted on the mounting frame 20, and the drive system 40 is configured to drive the cutting wheel 30 to rotate relative to the mounting frame 20.

In the above embodiment, the cutting wheel 30 is not directly mounted on the frame 10, but the mounting frame 20 is disposed between the frame 10 and the cutting wheel 30, the cutting wheel 30 is rotatably disposed relative to the mounting frame 20, and the mounting frame 20 is configured to be capable of swinging relative to the frame 10, so that when the cutting wheel 30 is subjected to a large impact force, the impact on the frame 10 is relieved by the swinging of the mounting frame 20 relative to the frame 10, the damage to the frame 10 is reduced, and the service life of the frame 10 and other components connected to the frame is prolonged.

In some embodiments, the cutting device further comprises a limiting device for limiting the amount of angle that the mounting bracket 20 swings with respect to the frame 10.

Through setting up stop device, can restrict the installation frame 20 for the wobbling angle size of frame 10, with the swing control of installation frame 20 for frame 10 in predetermined swing range, avoid causing great impact to frame 10 because swing angle is too big, influence the security and the stability of frame 10 and installation frame 20.

The specific structural form of the limiting device can be selected in various ways.

In some embodiments, the limiting device includes a limiting shaft 22 installed on the rack 10 and a limiting hole 25 provided in the mounting bracket 20, the limiting hole 25 includes an arc-shaped hole, and the limiting shaft 22 is inserted into the arc-shaped hole and moves in the arc-shaped hole.

By arranging the limiting hole 25 and enabling the limiting shaft 22 to move only in the limiting hole 25, the swing angle of the mounting frame 20 relative to the rack 10 can be limited by the length of the limiting hole 25.

As shown in fig. 2, the limiting hole 25 is configured to include an arc-shaped hole, so that when the mounting bracket 20 swings relative to the rack 10, the limiting shaft 22 makes an arc-shaped motion in the limiting hole 25, which is the same as the motion trajectory of the mounting bracket 20, and prevents the blocking of the relative swing between the mounting bracket 20 and the rack 10 due to the shape of the limiting hole 25. The arc length of the arc-shaped hole is the movement stroke of the limiting shaft 22.

In some embodiments, the cutting device further comprises a resilient member 24, the resilient member 24 being disposed between the frame 10 and the mounting bracket 20.

By providing the elastic member 24 between the frame 10 and the mounting bracket 20, the impact of the relative swinging of the frame 10 and the mounting bracket 20 on the frame 10 and the mounting bracket 20 can be further alleviated.

The elastic member 24 also serves to restore the frame 10 and the mounting bracket 20 after the frame 10 and the mounting bracket 20 are relatively swung.

The elastic member 24 may be a spring or a member made of an elastic material.

In some embodiments, drive system 40 includes an oil source 46, a hydraulic line 41, a hydraulic motor 42, and a reducer 43, hydraulic line 41 being connected between oil source 46 and hydraulic motor 42, hydraulic line 41 being mounted on frame 10, and hydraulic motor 42 and reducer 43 being drivingly connected and both mounted on mounting bracket 20.

In the above embodiment, the driving system 40 is a hydraulic driving system, and compared with a scheme that a storage battery or a small gasoline engine is used as the driving system, the cutting power can be improved, the working time of the cutting device can be prolonged, and the problem that the storage battery or the gasoline engine needs to be charged and oiled after working for a period of time is solved.

In some embodiments, the drive system 40 further includes a buffer valve group 45, and the buffer valve group 45 is disposed on the hydraulic line 41 and is used to relieve oil pressure on the hydraulic line 41.

By providing the cushion valve group 45, the oil pressure that is formed on the hydraulic line 41 when the cutter wheel 30 is impacted can be relieved. The buffer valve group 45, the elastic piece 24 and the mounting frame 20 can swing relative to the frame 10 to form a triple buffer structure, so that impact force applied to the cutting wheel 30 is effectively buffered, and impact damage to the frame 10 and other components connected with the frame 10 is reduced.

As shown in fig. 3, in some embodiments, the cushion valve group 45 includes a first overflow valve 451, a second overflow valve 452, a first check valve 453, and a second check valve 454, the first overflow valve 451 and the second overflow valve 452 are connected in parallel between the inlet and the outlet of the hydraulic motor 42, the first check valve 453 is connected between the first overflow valve 451 and the inlet of the hydraulic motor 42, and the second check valve 454 is connected between the second overflow valve 452 and the outlet of the hydraulic motor 42.

In some embodiments, drive system 40 further includes a directional valve 47 disposed on hydraulic line 41. By providing a diverter valve 47, the direction of flow of the hydraulic line 41 can be switched, thereby changing the direction of rotation of the cutting wheel 30.

In some embodiments, the cutting device further comprises a transmission assembly 60, the cutting wheel 30 comprises a first cutting wheel 31 and a second cutting wheel 32, the transmission assembly 60 is in driving connection with the driving system 40, and the transmission assembly 60 is used for transmitting the driving force provided by the driving system 40 to the first cutting wheel 31 and the second cutting wheel 32 respectively and enabling the first cutting wheel 31 and the second cutting wheel 32 to rotate in opposite directions.

By providing the transmission assembly 60, transmission of the driving force can be achieved. Also, the cutting wheel 30 includes a first cutting wheel 31 and a second cutting wheel 32, and the first cutting wheel 31 and the second cutting wheel 32 are rotated in opposite directions, and a shearing force can be generated by the first cutting wheel 31 and the second cutting wheel 32 for shearing a cable, reinforced concrete, etc. at a rescue scene.

Based on the cutting device, the invention further provides a rescue vehicle which comprises the cutting device.

In some embodiments, the rescue vehicle further comprises a quick-connect coupling 50, the cutting device being connected to the quick-connect coupling 50. The quick coupling 50 may be connected to the frame 10 of the cutting device.

The quick connector 50 has the function of quickly replacing the connecting part, so that the quick replacement function of the connecting part is realized. On the rescue site, the rescue tool connected with the quick connector 50 can be quickly replaced as required.

In some embodiments, the rescue vehicle further comprises a wheel carrier 90, an arm support and a control device, the wheel carrier 90 is used for supporting the cutting device, the quick joint 50 is connected with the arm support, and the control device is configured to drive the arm support to move relative to the wheel carrier 90 so as to enable the quick joint 50 to approach the cutting device and achieve connection.

As shown in fig. 4, the boom support may include a telescopic arm 70 and a boom 80, the telescopic arm 70 includes a telescopic part 71 and an arm 72, and the telescopic part 71 is telescopically connected with the arm 72 to adjust the length of the telescopic arm 70. The boom 80 is hingedly connected to the stick 72. The quick-connect coupling 50 is hingedly connected to the telescoping section 71.

Through setting up controlling means, can realize that quick-connect coupling 50 and cutting device's automatic alignment and automatic connection realize unmanned operation, improve the agility of operation, and then improve rescue efficiency.

By arranging the wheel frame 90, the cutting device can be placed on the wheel frame 90 when the cutting device is in a non-working state, and accidental injury of people or objects by the cutting wheel 30 is avoided.

The wheel carrier 90 may be fixedly mounted to the frame of the vehicle.

As shown in fig. 5, the wheel frame 90 includes a support portion 91 and a support portion 92, and the support portion 91 has an arc shape and supports the cutting wheel 30 and the like. The support portion 92 is used to provide a supporting function.

The positive technical effects of the cutting device in the above embodiments are also applicable to rescue vehicles, and are not described herein again.

Besides the emergency rescue vehicle, the cutting device provided by the invention can be arranged on any engineering vehicle (such as an excavator, a breaking and dismantling vehicle and a lifting fire truck) with a quick-change machine tool.

The structure of one embodiment of the cutting device and the rescue vehicle of the invention is described below with reference to the accompanying drawings 1 to 5:

as shown in fig. 1, the cutting device comprises a frame 10, a mounting frame 20, a cutting wheel 30 and a driving system 40, wherein the frame 10 is connected with a quick connector 50 on the rescue vehicle, the mounting frame 20 is swingably mounted on the frame 10, and the cutting wheel 30 is rotatably mounted on the mounting frame 20. The drive system 40 is used to drive the cutting wheel 30 to rotate relative to the mounting frame 20.

The rack 10 includes two first mounting plates arranged in parallel and a second mounting plate for connecting the two first mounting plates. The two first mounting plates have a predetermined gap therebetween to form a space for arranging the mounting bracket 20. Of course, in other embodiments, the mounting bracket 20 may be disposed on an outer side of one of the first mounting plates.

The mounting bracket 20 comprises an L-shaped plate. A rotating shaft 21 is connected between the two first mounting plates of the rack 10, and the mounting frame 20 is rotatably mounted on the rotating shaft 21. When the cutting wheel 30 is subjected to a large impact force, the mounting frame 20 can swing around the rotating shaft 21 relative to the frame 10 at a certain angle, so that the impact is relieved, and the impact damage to the frame 10 is reduced.

As shown in fig. 2, the frame 10 is further provided with a limiting shaft 22, and the limiting shaft 22 can be connected to the first mounting plate. The mounting bracket 20 is provided with an arc-shaped limiting hole 25, the limiting shaft 22 is inserted into the limiting hole 25, and when the mounting bracket 20 swings relative to the rack 10, the limiting shaft 22 moves in the limiting hole 25. The diameter of the limiting shaft 22 is smaller than the length of the limiting hole 25, so that the limiting shaft 22 has a certain moving space in the limiting hole 25.

The frame 10 is further provided with a positioning pin 23, and two ends of the elastic member 24 are respectively connected with the positioning pin 23 and the frame 10. When the mounting frame 20 swings relative to the frame 10, the elastic member 24 is compressed, and the elastic member 24 can absorb the impact on the mounting frame 20, so as to reduce the impact on the frame 10. Under the elastic potential energy of the elastic member 24, the mounting frame 20 and the frame 10 can also be restored to the relative positions before the impact.

The cutting wheel 30 comprises a first cutting wheel 31 and a second cutting wheel 32. The first and

second cutting wheels

31 and 32 are provided at the outer peripheries thereof with semicircular wheel housings 33 to protect the first and

second cutting wheels

31 and 32. Referring to fig. 3, a wear pad 34 is provided between the first cutting wheel 31 and the second cutting wheel 32 to prevent the first cutting wheel 31 and the second cutting wheel 32 from being worn.

As shown in fig. 3, the driving system 40 includes a hydraulic pipeline 41, a hydraulic motor 42, a speed reducer 43, a connecting key 44, an oil source 46, a buffer valve group 45 and a reversing valve 47, the hydraulic pipeline 41 is mounted on the frame 10, the hydraulic motor 42 and the speed reducer 43 are in driving connection through the connecting key 44, and both the hydraulic motor 42 and the speed reducer 43 are mounted on the mounting frame 20.

The direction valve 47 is provided between the oil source 46 and the cushion valve group 45, and the cushion valve group 45 is provided between the direction valve 47 and the hydraulic motor 42.

The hydraulic line 41 includes a first hydraulic line 411, a second hydraulic line 412, a third hydraulic line 413, and a fourth hydraulic line 414, the first hydraulic line 411 and the second hydraulic line 412 are connected in parallel between the hydraulic motor 42 and the buffer valve group 45, and the third hydraulic line 413 and the fourth hydraulic line 414 are connected in parallel between the buffer valve group 45 and the oil source 46.

The cushion valve group 45 includes a first overflow valve 451, a second overflow valve 452, a first check valve 453, and a second check valve 454, the first overflow valve 451 and the second overflow valve 452 are connected in parallel between an inlet and an outlet of the hydraulic motor 42, an inlet of the first check valve 453 is communicated with the outlet of the first overflow valve 451, an outlet of the first check valve 453 is communicated with the inlet of the hydraulic motor 42, an inlet of the second check valve 454 is communicated with the outlet of the second overflow valve 452, and an outlet of the second check valve 454 is communicated with the outlet of the hydraulic motor 42.

The reversing valve 47 comprises a three-position four-way electromagnetic valve, and four oil ports of the reversing valve 47 are respectively communicated with two oil ports of the buffer valve group 45, an oil inlet and an oil return port of the oil source 46.

The oil source 46 includes an oil tank and an oil pump.

As shown in fig. 4 and 5, the rescue vehicle includes a telescopic arm 70, a movable arm 80, a wheel carrier 90 and a control device, the telescopic arm 70 includes a telescopic part 71 and an arm 72, and the telescopic part 71 is telescopically connected to the arm 72 to adjust the length of the telescopic arm 70. The boom 80 is hingedly connected to the stick 72. The other end of the movable arm 80 can be hinged to a swivel device on the rescue vehicle. The quick-connect coupling 50 is hingedly connected to the telescoping section 71. The wheel carrier 90 is used for supporting the cutting device, the quick joint 50 is connected with the telescopic arm 70, and the control device is configured to drive the telescopic arm 70 and the movable arm 80 to move relative to the wheel carrier 90, so that the quick joint 50 approaches the cutting device and the connection is realized.

In the transport state, the cutting device is placed on the wheel carriage 90; in the working state, the driver is automatically connected with the frame 10 of the cutting device by controlling the movable arm 80, the telescopic arm 70 and the quick joint 50. When the arm support is quickly replaced, the position of the arm support is detected in real time through a position sensor, and when the quick connector 50 is 1 m away from the cutting device, the arm support is decelerated to half of the movement speed; when the moving speed reaches 0.5 m, the speed is reduced to half of the moving speed; when the vehicle moves to 0.2 m, the quick connector 50 carries out position fine adjustment, and the quick change of the machines of the emergency rescue vehicle is realized.

As shown in fig. 3, a transmission assembly 60 is provided between the driving system 40 and the cutting wheel 30, and the transmission assembly 60 includes a first transmission shaft 61, a first transmission wheel 62, a second transmission wheel 63, a third transmission wheel 64, a second transmission shaft 65, a third transmission shaft 66, a bearing 67 and a bushing 68.

The first transmission shaft 61 is drivingly connected to the speed reducer 43, and a sleeve 68 is provided around the first transmission shaft 61. The first transmission shaft 61 is connected with the first transmission wheel 62 to transmit the power of the hydraulic motor 42 to the first transmission wheel 62. The first drive wheel 62 is simultaneously engaged with the second drive wheel 63 and the third drive wheel 64 to transmit power through the second drive wheel 63 to a second drive shaft 65 connected to the second drive wheel 63 and through the third drive wheel 64 to a third drive shaft 66 connected to the third drive wheel 64, the second drive shaft 65 being connected to the first cutting wheel 31 and the third drive shaft 66 being connected to the second cutting wheel 32. The direction of rotation of the second transmission wheel 63 and the third transmission wheel 64 is reversed, so that the direction of rotation of the first cutting wheel 31 and the second cutting wheel 32 is reversed to form a shear-like force to cut the obstacle. The second transmission shaft 65 is provided at its outer periphery with a bearing 67.

Through the description of the cutting device and the rescue vehicle embodiment of the invention, the cutting device and the rescue vehicle embodiment of the invention have at least one or more of the following advantages:

1. the connecting frame and the rack can swing relatively, an elastic piece is arranged between the connecting frame and the rack, and a buffer valve group is arranged in a driving system, so that the buffer valve group has a better buffer effect, can effectively buffer impact force in the cutting process, and reduces excessive collision among components;

2. the hydraulic driving system is adopted, so that a power source can be continuously provided for a long time, the problem that the traditional gasoline engine and the storage battery need to be oiled and charged every time when working for a period of time is solved, and the working time of the cutting device is prolonged; the hydraulic system provides a hydraulic motor with larger torque and rotating speed, the cutting power is high, and the barrier can be cut quickly;

3. the end part of the arm support is connected with a quick connector, so that quick change between different machines and tools of the emergency rescue vehicle can be realized;

4. through controlling means and quick-connect coupling, can realize automation and remote operation cutting device.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention and not to limit it; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art will understand that: modifications to the specific embodiments of the invention or equivalent arrangements of parts of the features may be made without departing from the spirit of the invention, and these modifications and equivalents are intended to be included within the scope of the claims.

Claims

1. A cutting device, comprising:

a frame (10);

a mounting bracket (20) which is swingably mounted on the frame (10);

a cutting wheel (30) rotatably mounted on the mounting bracket (20); and

a drive system (40) configured to drive the cutting wheel (30) in rotation relative to the mounting frame (20).

2. The cutting device according to claim 1, characterized in that it further comprises limiting means for limiting the angular extent of the oscillation of said mounting (20) with respect to said frame (10).

3. The cutting device according to claim 2, characterized in that the limiting device comprises a limiting shaft (22) mounted on the frame (10) and a limiting hole (25) provided in the mounting bracket (20), the limiting hole (25) comprising an arc-shaped hole, the limiting shaft (22) being inserted into the arc-shaped hole and moving therein.

4. The cutting device according to claim 1, further comprising a resilient member (24), the resilient member (24) being disposed between the frame (10) and the mounting bracket (20).

5. The cutting device according to claim 1, characterized in that the drive system (40) comprises an oil source (46), a hydraulic line (41), a hydraulic motor (42) and a reducer (43), the hydraulic line (41) being connected between the oil source (46) and the hydraulic motor (42), the hydraulic line (41) being mounted on the frame (10), the hydraulic motor (42) and the reducer (43) being drivingly connected and both being mounted on the mounting frame (20).

6. The cutting device according to claim 5, wherein the drive system (40) further comprises a set of buffer valves (45), the set of buffer valves (45) being arranged on the hydraulic line (41) and serving to relieve the oil pressure on the hydraulic line (41).

7. The cutting apparatus according to claim 6, wherein the cushion valve group (45) includes a first relief valve (451), a second relief valve (452), a first check valve (453), and a second check valve (454), the first relief valve (451) and the second relief valve (452) being connected in parallel between an inlet and an outlet of the hydraulic motor (42), the first check valve (453) being connected between the first relief valve (451) and the inlet of the hydraulic motor (42), the second check valve (454) being connected between the second relief valve (452) and the outlet of the hydraulic motor (42).

8. The cutting device according to claim 5, wherein the drive system (40) further comprises a reversing valve (47) arranged on the hydraulic line (41).

9. The cutting device according to claim 1, further comprising a transmission assembly (60), wherein the cutting wheel (30) comprises a first cutting wheel (31) and a second cutting wheel (32), the transmission assembly (60) is in driving connection with the drive system (40), and the transmission assembly (60) is configured to transmit the driving force provided by the drive system (40) to the first cutting wheel (31) and the second cutting wheel (32), respectively, and to rotate the first cutting wheel (31) and the second cutting wheel (32) in opposite directions.

10. Rescue vehicle, characterized in that it comprises a cutting device according to any one of claims 1 to 9.

11. Rescue vehicle as claimed in claim 10, characterized in that it further comprises a quick coupling (50), the cutting device being intended to be connected to the quick coupling (50).

12. Rescue vehicle as claimed in claim 11, characterized in that it further comprises a wheel carrier (90), an arm support and control means, the wheel carrier (90) being intended to support the cutting means, the quick joint (50) being connected to the arm support, the control means being configured to drive the arm support in a movement relative to the wheel carrier (90) in order to bring the quick joint (50) close to the cutting means and to achieve the connection.