CN218519581U - Wrecker device based on three towed rescued vehicles - Google Patents

Abstract

The utility model provides a wrecker device based on three rescued cars of dragging carries, includes wrecker body (1) that has tray portion (12), sets up on tray portion (12) and be used for extending the end part of the length of tray portion (12), through wrecker body (1), has realized handling the obstacles removed of rescued car, through end part, has realized fixing to the extension brace table of rescued car, has consequently improved the work efficiency of wrecker.

Description

Wrecker device based on three towed rescued vehicles

Technical Field

The utility model relates to a wrecker device, especially a wrecker device based on three rescue cars of dragging and carrying.

Background

The wrecker is one of special vehicles, is widely applied to mainly used road fault vehicles, urban illegal vehicles, emergency rescue and the like, and therefore the wrecker device is an important traffic device, and in the existing wrecker device, no wrecker device based on three rescued vehicles is provided, and the wrecker device can only be used for towing one back of the body, so that the working efficiency of the wrecker is influenced.

Disclosure of Invention

The object of the utility model is a wrecker device based on three towed rescued cars.

In order to overcome the technical defect, the utility model aims at providing a wrecker device based on three rescued cars of dragging and carrying has consequently improved the work efficiency of wrecker.

In order to achieve the purpose, the utility model adopts the technical proposal that: comprises a wrecker body with a support part and a tip part which is arranged on the support part and is used for extending the length of the support part.

Because the wrecker body and the end part are designed, the wrecker body can be used for clearing the wrecker of the rescued car, and the end part can be used for fixing the extension supporting table of the rescued car, so that the work efficiency of the wrecker is improved.

The utility model discloses a, according to the fixed mode of extension brace table to by the rescue car the mutual hookup of obstacles removing car body and end part.

The utility model discloses a, according to the mode that forms arc brace table the end part couples with the wrecker body.

The utility model discloses a, end part sets up to including preceding cat ladder and fender beam or back cat ladder and follower rod.

The technical effects of the four technical schemes are as follows: the front supporting point, the middle supporting point and the rear supporting point of the rescue vehicle on the supporting platform part are arranged through the end head part.

The utility model discloses a, still include first annex device and first annex device sets up between end part and saddle portion, and first annex device sets up to include bracket and returning face plate.

The technical effects of the technical scheme are as follows: integrated mounting of other components is achieved.

The utility model discloses a, be provided with back cat ladder and bracket on the wrecker body respectively, be provided with the returning face plate and be provided with the follower rod between back cat ladder and the wrecker body between bracket and the wrecker body, cat ladder and be provided with the fender beam in the front between cat ladder and bracket before being provided with on the bracket.

The technical effects of the technical scheme are as follows: through wrecker body, preceding cat ladder, fender roof beam, back cat ladder, follower rod, bracket and returning face plate, formed the utility model discloses a basic technical scheme has solved the utility model discloses a technical problem.

The utility model discloses a, the wrecker body sets up to including motor vehicle chassis portion, tray portion and trailing arm portion and be provided with tray portion at the upper end terminal surface portion of motor vehicle chassis portion, rear end terminal surface portion at motor vehicle chassis portion is provided with the trailing arm portion, the upper end terminal surface front portion of tray portion sets up to hookup with the bracket and the upper end terminal surface front portion of tray portion sets up to hookup with the returning face plate contact, the front end terminal surface front portion of tray portion sets up to hookup and the rear end terminal surface front portion of tray portion sets up to hookup through round pin axle and rear ladder, the side rear portion of tray portion sets up to hookup through round pin axle and trailing bar and motor vehicle chassis portion sets up to 4X 2 chassis, tray portion sets up to the rectangle seat body.

The utility model discloses a, trailing arm portion sets up to including flexible arm, lift telescoping cylinder and guide rail and the upper end of guide rail sets up to the frame hookup with motor vehicle chassis portion, overhead the ear seat that is provided with and the ear seat of flexible arm sets up to the frame hookup through round pin axle and motor vehicle chassis portion in the outer bobbin case of flexible arm, the outer end of outer bobbin case side portion at flexible arm is provided with the flange piece and the flange piece of flexible arm sets up to couple with the guide rail slidingtype, the upper end of lift telescoping cylinder sets up to the frame hookup through round pin axle and motor vehicle chassis portion and the lower end of lift telescoping cylinder sets up to the outer end of outer bobbin case side inside hookup through round pin axle and flexible arm, be provided with the support claw and flexible arm sets up to at least three section flexible arm outside the inner tube case of flexible arm, the lift telescoping cylinder sets up to two sections telescoping cylinders and the hydraulic pressure port portion of lift telescoping cylinder sets up to be connected with the hydraulic means of wrecker body, the guide rail sets up to the U font fork that the medial surface has the cell body and the groove body of groove body sets up to and couples with flexible arm.

The technical effects of the two technical schemes are as follows: the device realizes the arrangement of dragging the front overhang long vehicle and realizes the tray arrangement of the rescue vehicle.

The utility model discloses a, preceding cat ladder sets up to including frame portion and strip portion and the outer end of frame portion sets up to linking with the strip portion, and the end sets up to linking with the fender beam through round pin axle and bracket and the inboard setting of the perpendicular portion lower extreme terminal surface of frame portion to linking, and frame portion sets up to the trapezoidal font frame body and the strip portion sets up to the rectangular beam body.

The utility model discloses a, the fender beam sets up to rectangle strip-shaped body and the upper end terminal surface portion of fender beam sets up to be coupleed with preceding cat ladder, and the medial surface portion of fender beam sets up to be coupleed with wrecker body contact.

The technical effects of the two technical schemes are as follows: the overturning transverse extending support is realized.

The utility model discloses a, back cat ladder sets up to the rectangle seat body and the inner end terminal surface portion of back cat ladder sets up to coupleing with wrecker body through the round pin axle, and the side portion of back cat ladder sets up to coupleing through round pin axle and follower rod.

The utility model discloses a, the follower rod sets up to spring follower rod, hydraulic telescoping cylinder or electronic distance rod and one of them end of follower rod sets up to coupleing through round pin axle and wrecker body, and wherein another end of follower rod sets up to coupleing through round pin axle and back cat ladder.

The technical effects of the two technical schemes are as follows: the overturning, pulling and extending support is realized.

The utility model discloses a, the bracket sets up to rectangle side frame body and the lower extreme terminal surface portion of bracket sets up to hookup with the wrecker body, and the front frame of bracket sets up to hookup and the back frame of bracket sets up to hookup through round pin axle and returning face plate with preceding cat ladder through the round pin axle.

The utility model discloses a, the returning face plate sets up to the lamellar body that the outer end terminal surface has the clinoid and the inner terminal surface portion of returning face plate sets up to couple through round pin axle and bracket, and the clinoid of returning face plate sets up to couple with wrecker body contact.

The technical effects of the two technical schemes are as follows: the setting of the approach bridge for moving the rescue vehicle on the front ladder is realized.

The utility model relates to a, the height setting of bracket is 300-500mm and the limit backswing angle alpha of back cat ladder sets up to 15-22.

The technical effects of the technical scheme are as follows: the outer tail parts of the two rescue vehicles on the supporting platform part are lifted, so that the two rescue vehicles on the supporting platform part are distributed in a V shape, and the stability of the two rescue vehicles on the supporting platform part is ensured.

The utility model discloses a, wrecker body and preceding cat ladder, the fender beam, back cat ladder and follower rod set up to the mode that connects length according to the extension and distribute and wrecker body, preceding cat ladder, the fender beam, back cat ladder and follower rod and bracket and returning face plate set up to distribute according to the mode that forms the inclined plane and support, the central line of wrecker body, the central line of preceding cat ladder, the central line of fender beam, the central line of back cat ladder, the central line of bracket and the central line setting of returning face plate are on same straight line, two lift telescoping cylinder settings are between flexible arm and wrecker body, two follower rods set up between cat ladder and wrecker body at the back.

In this technical scheme, the wrecker body is basic unit spare, also the utility model discloses a necessary technical characteristics, preceding cat ladder, fender roof beam, back cat ladder, follower rod, bracket and returning face plate are the functional unit, realize the utility model discloses a characteristic of other technological effects, the design of motor vehicle chassis portion, tray portion, telescopic arm, lift telescopic cylinder, guide rail, frame portion and these technical characteristics of billet portion are the technical characteristics who accords with the patent law and implement the rule.

In the technical scheme, the wrecker body and the end part which are fixed on the extension supporting table of the rescued vehicle are important technical characteristics, and have novelty, creativity and practicability in the technical field of wrecker devices based on three rescued vehicles, and terms in the technical scheme can be explained and understood by patent documents in the technical field.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the description below are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Figure 1 is a schematic view of the present invention,

figure 2 is a schematic view of the utility model in an idle running state,

FIG. 3 is a schematic view of the driving state of the three towed rescued vehicles of the present invention,

FIG. 4 is a schematic view of the driving state of the vehicle with a long front suspension for towing according to the present invention,

the wrecker comprises a wrecker body-1, a front ladder-2, a stop beam-3, a rear ladder-4, a follower rod-5, a bracket-6, a turnover plate-7, a motor vehicle chassis part-11, a supporting platform part-12, a telescopic arm-13, a lifting telescopic cylinder-14, a guide rail-15, a frame part-21 and a bar part-22.

Detailed Description

Terms such as "having," "including," and "comprising," as used herein with respect to the present invention, are to be understood as not specifying the presence or addition of one or more other elements or combinations thereof.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood as a specific case by those skilled in the art.

In addition, the technical features mentioned in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other, and unless otherwise specified, the devices and materials used in the following examples are commercially available, and if the processing conditions are not explicitly stated, please refer to the purchased product specification or follow the conventional method in the art.

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.

Fig. 1 is one of the first embodiment of the utility model, combine the figure to specifically explain this embodiment, include wrecker body 1, preceding cat ladder 2, fender beam 3, back cat ladder 4, follower rod 5, bracket 6 and returning face plate 7 and be provided with back cat ladder 4 and bracket 6 respectively on wrecker body 1, be provided with returning face plate 7 and be provided with follower rod 5 between back cat ladder 4 and wrecker body 1 between bracket 6 and wrecker body 1, cat ladder 2 and be provided with fender beam 3 between preceding cat ladder 2 and bracket 6 before being provided with on bracket 6.

In the present embodiment, the wrecker body 1 is configured to include a motor vehicle chassis part 11, a pallet part 12 and a pallet arm part and a pallet part 12 is provided at an upper end face part of the motor vehicle chassis part 11, a pallet arm part is provided at a rear end face part of the motor vehicle chassis part 11, an upper end face front part of the pallet part 12 is configured to be coupled with a pallet 6 and an upper end face front part of the pallet part 12 is configured to be coupled with a flip board 7 in a contact manner, a front end face front part of the pallet part 12 is configured to be coupled with a bumper beam 3 in a contact manner and a rear end face front part of the pallet part 12 is configured to be coupled with a rear ladder stand 4 by a pin shaft, a side rear part of the pallet part 12 is configured to be coupled with a follower rod 5 by a pin shaft and the motor vehicle chassis part 11 is configured to be a 4 × 2 chassis, and the pallet part 12 is configured to be a rectangular body seat.

Through wrecker body 1, formed to fender beam 3, back cat ladder 4, follower rod 5, the support tie point of bracket 6 and returning face plate 7, by saddle portion 12, realized being connected with fender beam 3, realized being connected with back cat ladder 4, realized being connected with follower rod 5, realized being connected with bracket 6, realized being connected with returning face plate 7, by motor vehicle chassis portion 11, realized driving saddle portion 12 and trailing arm portion and carried out motor motion and handle, by trailing arm portion, realized dragging the string to being handled by the rescue car, its technical aim at: for serving as a support carrier for the rear ladder 4 and the rear ladder 4.

In this embodiment, the arm supporting portion is configured to include a telescopic arm 13, the telescopic lifting cylinder 14 and the guide rail 15 are arranged and the upper end of the guide rail 15 is configured to be coupled with the frame of the chassis portion 11 of the motor vehicle, the inner end of the outer cylinder shell of the telescopic arm 13 is provided with an ear seat and the ear seat of the telescopic arm 13 is configured to be coupled with the frame of the chassis portion 11 of the motor vehicle through a pin shaft, the outer end of the outer cylinder shell of the telescopic arm 13 is provided with a flange block and the flange block of the telescopic arm 13 is configured to be slidably coupled with the guide rail 15, the upper end of the telescopic lifting cylinder 14 is configured to be coupled with the frame of the chassis portion 11 of the motor vehicle through a pin shaft and the lower end of the telescopic lifting cylinder 14 is configured to be internally coupled with the outer end of the outer cylinder shell of the telescopic arm 13 through a pin shaft, the outer end of the inner cylinder shell of the telescopic arm 13 is provided with a pawl and the telescopic arm 13 is configured to be at least three-section telescopic arms, the telescopic lifting cylinder 14 is configured to be two-section and the hydraulic port portion of the telescopic cylinder 14 is configured to be coupled with the hydraulic device of the obstacle clearing vehicle body 1, the guide rail 15 is configured to be coupled with the U-shaped body having a recessed fork-shaped body having a groove body.

The technical purpose is as follows: the trailer can be used for towing a vehicle with a long front suspension.

In the present embodiment, the bracket 6 is provided as a rectangular frame body and the lower end face portion of the bracket 6 is provided to be coupled with the wrecker body 1, the front frame of the bracket 6 is provided to be coupled with the front ladder 2 by a pin shaft and the rear frame of the bracket 6 is provided to be coupled with the turnover plate 7 by a pin shaft.

Through bracket 6, formed the support tie point to wrecker body 1, preceding cat ladder 2 and returning face plate 7, by bracket 6, realized being connected with wrecker body 1, realized being connected with preceding cat ladder 2, realized being connected with returning face plate 7, its technical aim at: for serving as a support carrier for the front ladder 2 and the roll-over plate 7.

In this embodiment, the reversing plate 7 is provided as a sheet-like body having an inclined body at an outer end face thereof and an inner end face portion of the reversing plate 7 is provided to be coupled to the bracket 6 by a pin, and the inclined body of the reversing plate 7 is provided to be coupled to the obstacle clearing truck body 1 in a contact manner.

Through returning face plate 7, formed the support tie point to wrecker body 1 and bracket 6, by returning face plate 7, realized being connected with wrecker body 1, realized being connected with bracket 6, its technical aim at: and is used as a part for carrying the rescued vehicle to enter the bracket 6 and the front ladder stand 2.

In the present embodiment, the front ladder 2 is provided to include a rack portion 21 and a bar portion 22 and an outer end of the rack portion 21 is provided to be coupled to the bar portion 22, an inner end of a vertical portion of the rack portion 21 is provided to be coupled to the bracket 6 by a pin and an inner side of a lower end face of the vertical portion of the rack portion 21 is provided to be coupled to the stopper beam 3, the rack portion 21 is provided as a ladder-shaped rack body and the bar portion 22 is provided as a rectangular beam body.

Through preceding cat ladder 2, formed the support tie point to fender beam 3 and bracket 6, by frame portion 21, realized being connected with fender beam 3, realized being connected with bracket 6, by the billet portion 22, realized being fixed processing, its technical aim at to carried on the back by the rescue car before carrying: the device is used as a component for fixing the rescue vehicle before carrying.

In this embodiment, the blocking beam 3 is provided as a rectangular bar-shaped body and the upper end surface portion of the blocking beam 3 is provided to be coupled with the front ladder 2, and the inner side surface portion of the blocking beam 3 is provided to be coupled with the wrecker body 1 in a contact manner.

Through fender beam 3, formed the support tie point to wrecker body 1 and preceding cat ladder 2, by fender beam 3, realized being connected with wrecker body 1, realized being connected with preceding cat ladder 2, its technical aim at: is used as a part for connecting the front ladder 2 and the wrecker body 1.

In this embodiment, the rear ladder 4 is formed as a rectangular seat, and the inner end surface of the rear ladder 4 is connected to the truck body 1 by a pin, and the side surface of the rear ladder 4 is connected to the follower lever 5 by a pin.

Through back cat ladder 4, formed the support tie point to wrecker body 1 and follower rod 5, by back cat ladder 4, realized being connected with wrecker body 1, realized being connected with follower rod 5, its technical aim at: the device is used as a component for fixing the rescue vehicle after carrying.

In this embodiment, the follower rod 5 is provided as a spring follower rod and one end of the follower rod 5 is provided to be coupled with the truck body 1 by a pin, and the other end of the follower rod 5 is provided to be coupled with the rear ladder stand 4 by a pin.

Through the follower rod 5, formed the support tie point to wrecker body 1 and back cat ladder 4, by follower rod 5, realized being connected with wrecker body 1, realized being connected with back cat ladder 4, its technical aim at: is used as a part for connecting the rear ladder stand 4 and the wrecker body 1.

In this embodiment the height of the carriage 6 is set to 300-500mm and the limit backswing angle alpha of the rear ladder 4 is set to 15-22 deg..

The technical purpose is as follows: so that the rescued vehicles on the back and at the front and the back are fixed in an inward inclined manner.

In this embodiment, the wrecker body 1 and the front ladder 2, the stop beam 3, the rear ladder 4 and the follower rod 5 are arranged to be distributed according to the mode of extending the holding length, and the wrecker body 1, the front ladder 2, the stop beam 3, the rear ladder 4 and the follower rod 5, the bracket 6 and the turnover plate 7 are arranged to be distributed according to the mode of forming the inclined plane support, the center line of the wrecker body 1, the center line of the front ladder 2, the center line of the stop beam 3, the center line of the rear ladder 4, the center line of the bracket 6 and the center line of the turnover plate 7 are arranged on the same straight line, the two lifting telescopic cylinders 14 are arranged between the telescopic arm 13 and the wrecker body 1, and the two follower rods 5 are arranged between the rear ladder 4 and the wrecker body 1.

In one of the supporting examples of the first embodiment of the present invention, the height of the bracket 6 is set to 300mm and the limit back swing angle α of the rear ladder 4 is set to 15 °.

In the second embodiment of the present invention, the height of the bracket 6 is set to 500mm and the limit back swing angle α of the rear ladder 4 is set to 22 °.

In the third embodiment of the present invention, the height of the bracket 6 is set to 400mm and the limit swing angle α of the rear ladder 4 is set to 18 °.

When a vehicle to be rescued is carried, when one vehicle to be rescued is carried, the front ladder 2 and the rear ladder 4 are in a vertical state, the vehicle to be rescued is installed on the bracket part 12 by a hoisting mode, when the two vehicles to be rescued are carried, the bracket part 12 is moved backwards on the chassis part 11 of the motor vehicle, then the front ladder 2 and the rear ladder 4 are in a horizontal state, the stop beam 3 is contacted with the bracket part 12, the follower rod 5 is in an extending state, the front wheel of the vehicle to be rescued before carrying is sent to the frame part 21 by the hoisting mode, the bar part 22 acts on the front wheel of the vehicle to be rescued before carrying, the rear wheel of the vehicle to be rescued after carrying is sent to the rear ladder 4, the rear wheel of the vehicle to be rescued before carrying and the front wheel of the vehicle to be rescued after carrying are put on the bracket part 12 by the hoisting mode, thereby the two vehicles to be rescued are installed on the bracket part 12, the front ladder 2 and the rear ladder 4, and the lifting telescopic cylinder 14 is in an extending state, the flange of the telescopic arm 13 is positioned at the lower end of the groove body of the guide rail 15, the telescopic arm 13 is in an extension state, the front wheel of a vehicle with a long front overhang is placed on the supporting claw of the telescopic arm 13, the lifting telescopic cylinder 14 is in a contraction state, the flange of the telescopic arm 13 is positioned at the upper end of the groove body of the guide rail 15, the front wheel of the vehicle with a long front overhang is lifted, the wrecker is cleared through the chassis part 11 of the motor vehicle, after the wrecker is cleared, the lifting telescopic cylinder 14 is in an extension state, the flange of the telescopic arm 13 is positioned at the lower end of the groove body of the guide rail 15, the front wheel of the vehicle with a long front overhang is put down, the telescopic arm 13 is in a contraction state, the supporting claw of the telescopic arm 13 is separated from the front wheel of the vehicle with a long front overhang, the lifting telescopic cylinder 14 is in a contraction state, the flange of the telescopic arm 13 is positioned at the upper end of the groove body of the guide rail 15, two rescued vehicles are taken down from the saddle part 12, the front ladder stand 2 and the rear ladder stand 4 in a hoisting way.

In the second embodiment of the present invention, the follower rod 5 is provided as a hydraulic telescopic cylinder.

The technical purpose is as follows: the limitation of the limit rear swing angle of the rear ladder stand 4 is realized by a hydraulic telescopic cylinder.

In the third embodiment of the present invention, the follower rod 5 is an electric thrust rod.

The technical purpose is as follows: the limitation of the limit backswing angle of the rear ladder stand 4 is realized by an electric thrust rod.

The utility model discloses a second embodiment, according to the fixed mode of an extension brace table to the car that is rescued the wrecker body 1 and end part interconnect.

In this embodiment, the head member is coupled to the truck body 1 in such a manner as to form an arc-shaped support base.

In this embodiment the head piece is arranged to comprise a front ladder 2 and a stop beam 3 or a rear ladder 4 and a follower rod 5.

In this embodiment, a first attachment device is also included and is disposed between the head member and the pallet section 12, the first attachment device being configured to include the carriage 6 and the flipping panel 7.

The second embodiment of the present invention is based on the first embodiment.

The utility model has the characteristics of down:

1. due to the design of the wrecker body 1 and the end part, the wrecker body 1 is used for clearing the wrecker of the rescued car, and the end part is used for fixing the extension supporting table of the rescued car, so that the work efficiency of the wrecker is improved.

2. Because the front ladder 2, the stop beam 3, the rear ladder 4 and the follower rod 5 are designed, the double-end extending support is realized.

3. Due to the design of the bracket 6 and the turnover plate 7, the tilting support of the rescue vehicle before carrying on back is realized.

4. Owing to designed and carried out numerical range's injecion to the knot configuration form, made numerical range do the utility model discloses a technical scheme in the technical scheme technical characteristics, not through the formula calculation or through the technical characteristics that the limited number of experiments reachs, the experiment shows that this numerical range's technical characteristics has obtained fine technological effect.

5. Owing to designed the utility model discloses a technical characteristic, in technical characteristic's the effect alone and mutual set, through experimental demonstration, the utility model discloses an each item performance index is 1.7 times at least for current each item performance index, has fine market value through the aassessment.

The other technical features of the present invention, which are connected to the wrecker body 1 and the end member fixed to the extension support platform of the wrecker, are all one of the embodiments of the present invention, and the technical features of the above-mentioned embodiments can be arbitrarily combined, and in order to meet the requirements of patent laws, patent implementation rules and examination guidelines, all possible combinations of the technical features of the above-mentioned embodiments will not be described.

Therefore, in the technical field of the wrecker device based on three rescued vehicles, all technical contents including the wrecker body 1 with the support part 12 and the end part arranged on the support part 12 and used for extending the length of the support part 12 are within the protection scope of the invention.

Claims (10)

1. The utility model provides a wrecker device based on three rescued cars of dragging and carrying which characterized by: comprises a wrecker body (1) with a support part (12) and a terminal part which is arranged on the support part (12) and is used for extending the length of the support part (12).

2. The wrecker device based on three towed rescued vehicles as claimed in claim 1, wherein: the wrecker body (1) and the end part are mutually connected in a way of fixing the extension supporting platform of the rescued vehicle.

3. The wrecker device based on three towed rescued vehicles as claimed in claim 2, wherein: the end part is connected with the wrecker body (1) according to the mode of forming an arc-shaped supporting platform.

4. The wrecker device based on three towed rescued vehicles as claimed in claim 1, wherein: the end part is arranged to comprise a front ladder (2) and a stop beam (3) or a rear ladder (4) and a follower rod (5),

or, the first attachment device is arranged between the end part and the supporting platform part (12) and comprises a bracket (6) and a turnover plate (7).

5. The wrecker device based on three towed rescued vehicles as claimed in claim 4, wherein: the wrecker comprises a wrecker body (1) and is characterized in that a rear ladder stand (4) and a bracket (6) are respectively arranged on the wrecker body (1), a turnover plate (7) is arranged between the bracket (6) and the wrecker body (1), a follower rod (5) is arranged between the rear ladder stand (4) and the wrecker body (1), a front ladder stand (2) is arranged on the bracket (6), and a stop beam (3) is arranged between the front ladder stand (2) and the bracket (6).

6. The wrecker device based on three towed rescued vehicles as claimed in claim 5, wherein: the wrecker body (1) is arranged to comprise a motor vehicle chassis part (11), a supporting platform part (12) and a supporting arm part, the supporting platform part (12) is arranged at the upper end face part of the motor vehicle chassis part (11), the supporting arm part is arranged at the rear end face part of the motor vehicle chassis part (11), the front part of the upper end face of the supporting platform part (12) is connected with a supporting frame (6) and the front part of the upper end face of the supporting platform part (12) is connected with a turnover plate (7) in a contact way, the front part of the front end face of the supporting platform part (12) is connected with a stop beam (3) in a contact way and the front part of the rear end face of the supporting platform part (12) is connected with a rear ladder stand (4) through a pin shaft, the rear part of the side face of the supporting platform part (12) is connected with a follow-up rod (5) through a pin shaft and the motor vehicle chassis part (11) is arranged to be a 4 multiplied by 2 chassis, the supporting platform part (12) is arranged to be a rectangular base body,

or, the trailing arm portion sets up to including telescopic boom (13), lift telescopic cylinder (14) and guide rail (15) and the upper end of guide rail (15) sets up to the frame hookup with motor vehicle chassis portion (11), be provided with the ear seat on the outer cylinder shell inner end of telescopic boom (13) and the ear seat of telescopic boom (13) sets up to the frame hookup through round pin axle and motor vehicle chassis portion (11), be provided with the flange piece and the flange piece of telescopic boom (13) sets up to the frame hookup with guide rail (15) slidingtype hookup in the outer cylinder shell outer end side portion of telescopic boom (13), the upper end of lift telescopic cylinder (14) sets up to the frame hookup through round pin axle and motor vehicle chassis portion (11) and the lower end of lift telescopic cylinder (14) sets up to the outer shell cylinder shell tube side inside hookup through round pin axle and telescopic boom (13), the inner cylinder shell outer end of telescopic boom (13) is provided with the trailing claw and telescopic boom (13) sets up to at least three-section telescopic boom (13), lift telescopic cylinder (14) sets up to the hydraulic pressure drop-point and hydraulic pressure drop-point groove body (15) that the hydraulic pressure roadblock (15) and hydraulic pressure groove body (15) set up to the hydraulic pressure groove connection that has.

7. The wrecker device based on three towed rescued vehicles as claimed in claim 5, wherein: the front ladder (2) is provided with a frame part (21) and a bar part (22), the outer end of the frame part (21) is connected with the bar part (22), the inner end of the vertical part of the frame part (21) is connected with the bracket (6) through a pin shaft, the inner side of the lower end face of the vertical part of the frame part (21) is connected with the stop beam (3), the frame part (21) is provided with a ladder-shaped frame body, the bar part (22) is provided with a rectangular beam body,

or the stop beam (3) is a rectangular strip-shaped body, the end surface of the upper end of the stop beam (3) is connected with the front ladder (2), the inner side surface of the stop beam (3) is connected with the wrecker body (1) in a contact way,

or the rear ladder (4) is a rectangular seat body, the end surface part of the inner end of the rear ladder (4) is connected with the wrecker body (1) through a pin shaft, the side surface part of the rear ladder (4) is connected with the follower rod (5) through a pin shaft,

or the follow-up rod (5) is a spring follow-up rod, a hydraulic telescopic cylinder or an electric thrust rod, one end of the follow-up rod (5) is connected with the wrecker body (1) through a pin shaft, and the other end of the follow-up rod (5) is connected with the rear ladder (4) through a pin shaft.

8. The wrecker device based on three towed rescued vehicles as claimed in claim 5, wherein: the bracket (6) is arranged to be a rectangular frame body, the end surface part of the lower end of the bracket (6) is arranged to be connected with the wrecker body (1), the front frame of the bracket (6) is arranged to be connected with the front ladder (2) through a pin shaft, the rear frame of the bracket (6) is arranged to be connected with the turnover plate (7) through a pin shaft,

or the turnover plate (7) is a sheet body with an inclined body on the end face of the outer end, the end face of the inner end of the turnover plate (7) is connected with the bracket (6) through a pin shaft, and the inclined body of the turnover plate (7) is connected with the wrecker body (1) in a contact manner.

9. The wrecker device based on three towed rescued vehicles as claimed in claim 5, wherein: the height of the bracket (6) is set to be 300-500mm and the limit backswing angle alpha of the rear ladder (4) is set to be 15-22 degrees.

10. The wrecker device based on three towed rescued vehicles of any one of claims 1 to 9, wherein: wrecker body (1) and preceding cat ladder (2), fender roof beam (3), back cat ladder (4) and follower rod (5) set up to the mode that connects length according to the extension distributes and wrecker body (1), preceding cat ladder (2), fender roof beam (3), back cat ladder (4) and follower rod (5) set up to distribute according to the mode that forms the inclined plane support with bracket (6) and returning face plate (7), the central line of wrecker body (1), the central line of preceding cat ladder (2), the central line of fender roof beam (3), the central line of back cat ladder (4), the central line of bracket (6) and the central line of returning face plate (7) set up on same straight line, two lift cylinder (14) set up between flexible arm (13) and wrecker body (1), two follower rods (5) set up between back cat ladder (4) and wrecker body (1).

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