CN112279088A

CN112279088A - Automobile crane

Info

Publication number: CN112279088A
Application number: CN202011243601.7A
Authority: CN
Inventors: 李民成; 赵波; 李维珠
Original assignee: Hunan Chengxin Special Automobile Co ltd
Current assignee: Hunan Chengxin Special Automobile Co ltd
Priority date: 2020-11-10
Filing date: 2020-11-10
Publication date: 2021-01-29

Abstract

The invention discloses an automobile crane, which comprises a carriage and a gantry hanger frame arranged on the carriage, wherein the gantry hanger frame comprises a hanger frame body, a translation hoisting mechanism, a track, a support frame and an expansion and storage driving mechanism, and the hanger frame body is connected with the support frame; the hanger body can horizontally move relative to the track; the translation hoisting mechanism is arranged on the hanger body, and the rails are laid on two sides of the carriage; the unfolding and folding driving mechanism is respectively connected with the hanger body and the support frame and is used for respectively controlling the gantry hanger or the support frame to be in an unfolding and/or folding state so that the gantry hanger horizontally moves relative to the track during unfolding or is folded at the front end of the carriage during folding; the support frame is moved out of the track when being unfolded so as to be supported on the ground or is folded in the track when being stored. The automobile crane provided by the invention has high automation degree and good safety; the use is convenient, and the working efficiency is improved; the space is not occupied when the automobile is stored, and the space of the automobile compartment is saved.

Description

Automobile crane

Technical Field

The invention relates to the field of cranes, and particularly discloses an automobile crane.

Background

The automobile crane, also called crane and crane locomotive, is a kind of crane mounted on the general automobile chassis or special automobile chassis, and its driving cab and crane control cab are separately set.

The existing automobile crane mostly adopts a hydraulic telescopic boom to hoist the automobile crane, the hydraulic telescopic boom hoists a truck-mounted crane hoisting telescopic boom of the automobile crane, when the truck-mounted crane hoists the weight, whether overload is an unknown number under the condition is caused due to various unstable factors such as cargo weight, boom extension length and the like, safety accidents are easy to occur, the loaded telescopic boom can easily cause the inner crack and bending of an oil cylinder of a large boom, a steel wire rope inside the large boom is broken, and a steel cable hoisting a heavy object is seriously broken, so that unnecessary accidents are caused; in addition, the truck crane is heavy and inconvenient to use, and cannot be suitable for loading and unloading goods on the way of a common truck.

Therefore, the conventional hydraulic telescopic arm hoisting automobile crane has poor safety and cannot be suitable for loading and unloading goods of a common truck on the way, and the technical problem to be solved urgently is solved.

Disclosure of Invention

The invention provides an automobile crane, and aims to solve the technical problems that the existing hydraulic telescopic arm hoisting automobile crane is poor in safety and cannot be suitable for loading and unloading goods of a common truck on the way.

The invention provides an automobile crane, which comprises a carriage and a gantry hanger frame arranged on the carriage, wherein the gantry hanger frame comprises a hanger frame body, a translation hoisting mechanism, a track, a support frame and an expansion and storage driving mechanism, and the hanger frame body is connected with the support frame; the hanger body can horizontally move relative to the track; the translation hoisting mechanism is arranged on the hanger body, and the rails are laid on two sides of the carriage; the unfolding and folding driving mechanism is respectively connected with the hanger body and the support frame and is used for respectively controlling the gantry hanger or the support frame to be in an unfolding and/or folding state so that the gantry hanger horizontally moves relative to the track during unfolding or is folded at the front end of the carriage during folding; the support frame is moved out of the track when being unfolded so as to be supported on the ground or is folded in the track when being stored.

Furthermore, be equipped with the bearing bar on the gallows body, the bracing piece, and connect the portal frame folding mechanism between bearing bar and bracing piece, portal frame folding mechanism is including locating the first rocking arm on the bearing bar tip, locate the second rocking arm on the bracing bar tip, and install first pivot and folding actuating mechanism on first rocking arm and second rocking arm, folding actuating mechanism is including locating the folding gear of first rocking arm department, locate second rocking arm department and with folding gear matched with folding worm, the speed reducer that is connected with folding worm, and the folding driving motor that is connected with the speed reducer.

Furthermore, the portal frame folding mechanism further comprises a worm locking assembly arranged below the folding worm and used for locking the portal frame in the stretching state of the portal frame, the worm locking assembly comprises a first worm locking block, a second worm locking block, a first locking elastic piece and a second locking elastic piece, the folding worm comprises a worm wheel disc and a worm wheel shaft sleeved on the worm wheel disc, the worm wheel shaft is arranged between the first worm locking block and the second worm locking block, one end of the first worm locking block is abutted against the first locking elastic piece, and the other end of the first worm locking block extends out of the first rotating arm; one end of the second worm locking block is abutted with the second locking elastic part, and the other end of the second worm locking block extends out of the second rotating arm.

Furthermore, the translational hoisting mechanism comprises a first controller, a first electromagnet, a deflector rod, a hoisting driving motor, a transposition gear, a horizontal moving device and a vertical hoisting device, wherein the hoisting driving motor is connected with the transposition gear,

the first controller is respectively electrically connected with the first electromagnet and the hoisting driving motor and is used for controlling the attraction or repulsion of the first electromagnet so as to enable the shifting rod to shift the transposition gear to move up and down, enable the transposition gear to be meshed with the horizontal moving device or the vertical hoisting device, transmit the power of the hoisting driving motor to the horizontal moving device or the vertical hoisting device, and enable the horizontal moving device to drive the horizontal moving device to move horizontally or enable the vertical hoisting device to hoist the goods to be transported.

Further, the horizontal moving device comprises a horizontal moving rack, a horizontal moving gear and a horizontal moving platform, the horizontal moving rack is transversely arranged on the gantry hanging frame, the horizontal moving gear can horizontally move relative to the horizontal moving rack, the horizontal moving gear is arranged on the horizontal moving platform, and under the driving of the hoisting driving motor, the horizontal moving gear relatively moves on the horizontal moving rack so as to drive the horizontal moving platform to horizontally move on the gantry hanging frame.

Furthermore, perpendicular hoisting accessory includes jack-up drive gear, reel and wire rope, and jack-up drive gear is connected with the reel, and wire rope twines on the reel, and under jack-up driving motor's drive, jack-up drive gear area changes the reel to let wire rope lift by crane the goods of waiting to carry.

Furthermore, a self-locking device is arranged inside the winding drum and comprises inner limiting teeth, a winding drum buckle and a locking spring, the inner limiting teeth are sleeved on the winding drum and rotate relative to the winding drum, and the locking spring is positioned between the winding drum and the inner limiting teeth; the winding drum is provided with a positioning hole, and the winding drum buckle penetrates through the positioning hole and then abuts against the inner limiting tooth so as to clamp the winding drum with the inner limiting tooth.

Further, the track comprises a first guide rail and a second guide rail, the unfolding and taking-in driving mechanism comprises a second controller, a guide rail driving motor, a second electromagnet, a clutch device, a first transmission mechanism and a second transmission mechanism, the first transmission mechanism is connected with the first guide rail, the second transmission mechanism is connected with the second guide rail,

the second controller is respectively electrically connected with the second electromagnet and the guide rail driving motor and is used for controlling the second electromagnet to attract or repel the clutch device, so that the clutch device is matched with the first transmission mechanism and/or the second transmission mechanism, and the first transmission mechanism drives the first guide rail and/or the second transmission mechanism to drive the second guide rail to move.

Further, the first transmission mechanism comprises a first driving gear, the second transmission mechanism comprises a second driving gear, the first driving gear is meshed with the first guide rail, and the second driving gear is meshed with the second guide rail; the clutch device comprises a driving worm, a driving shaft, a clutch shaft buckle and a clutch shaft permanent magnet, the driving worm is connected with a main shaft of the guide rail driving motor, the clutch shaft permanent magnet is arranged at the end part of the driving shaft and is opposite to the second electromagnet, and the clutch shaft buckle is connected to the driving shaft.

Furthermore, the unfolding and accommodating driving mechanism also comprises a support frame telescopic assembly, the support frame telescopic assembly comprises a chute plate, a rack slider, a rack crank and a support frame driving rack, a second rotating shaft is arranged on the first guide rail, a rotating part which is rotatably connected with the second rotating shaft is correspondingly arranged on the support frame, and a circular arc-shaped wheel tooth section matched with the support frame driving rack is arranged on the rotating part; the rack crank is fixedly arranged on the driving rack of the support frame, the sliding chute plate is provided with a Z-shaped sliding chute, one end of the rack sliding block is in lap joint with the Z-shaped sliding chute, and the other end of the rack sliding block is in lap joint with the rack crank.

The beneficial effects obtained by the invention are as follows:

the automobile crane provided by the invention adopts a gantry crane structure, uses the hanger body, the translation hoisting mechanism, the track, the support frame and the unfolding and folding driving mechanism, and respectively controls the gantry hanger or the support frame to be in an unfolding and/or folding state through the unfolding and folding driving mechanism, so that the gantry hanger horizontally moves relative to the track when unfolded or is folded at the front end of a carriage when folded; the support frame is moved out of the track when being unfolded so as to be supported on the ground or is folded in the track when being stored. The automobile crane provided by the invention has high automation degree and good safety; the use is convenient, and the working efficiency is improved; the space is not occupied when the automobile is stored, and the space of the automobile compartment is saved.

Drawings

FIG. 1 is a schematic structural view of an embodiment of a mobile crane according to the present invention when deployed;

FIG. 2 is a schematic structural view of an embodiment of the mobile crane according to the present invention during storage;

FIG. 3 is a schematic structural view of an embodiment of a gantry crane of the mobile crane according to the present invention during storage;

FIG. 4 is a schematic structural view of an embodiment of a gantry crane of the present invention in an extended position;

FIG. 5 is an enlarged view of a portion A of FIG. 3;

FIG. 6 is an enlarged partial view of portion B of FIG. 4;

FIG. 7 is a schematic view of the first embodiment of the gantry crane shown in FIG. 1 in a stowed configuration;

FIG. 8 is a schematic view of the second embodiment of the gantry crane shown in FIG. 1 in a stowed configuration;

FIG. 9 is an enlarged partial view of section E of FIG. 7;

FIG. 10 is an enlarged partial view of portion F of FIG. 8;

FIG. 11 is an enlarged partial view of portion C of FIG. 4;

FIG. 12 is a perspective view of the hoist drive gear and spool shown in FIG. 11 as connected;

FIG. 13 is a schematic plan view of the hoist drive gear and spool shown in FIG. 11 as connected;

FIG. 14 is a cross-sectional view taken along plane A-A of FIG. 13;

FIG. 15 is a schematic structural view of the third embodiment of the gantry crane shown in FIG. 1 during stowing;

FIG. 16 is a schematic view of the fourth embodiment of the gantry crane shown in FIG. 1 in a stowed configuration;

fig. 17 is a partially enlarged view of portion D of fig. 4.

The reference numbers illustrate:

10. a carriage; 20. a gantry hanger; 21. a hanger body; 22. a translation hoisting mechanism; 23. a track; 24. a support frame; 25. a drive mechanism for unfolding and accommodating; 211. a load-bearing bar; 212. a support bar; 2131. a first rotating arm; 2132. a second rotating arm; 2133. a first rotating shaft; 2341. a folding gear; 2342. folding the worm; 2343. a speed reducer; 2344. a folding drive motor; 2345. a clamping block; 2251. a first worm locking block; 2252. a second worm locking block; 2253. a first locking resilient member; 2254. a second locking elastic member; 23421. a worm gear disc; 23422. a worm gear shaft; 222. a first electromagnet; 223. a deflector rod; 224. a hoist drive motor; 225. a transposition gear; 2261. a hoist drive gear; 2262. a reel; 2263. a wire rope; 2271. horizontally moving the rack; 2272. a horizontal moving gear; 2273. a horizontal moving stage; 2281. inner limit teeth; 2282. a winding drum is buckled; 2283. a locking spring; 231. a first guide rail; 232. a second guide rail; 251. a guide rail drive motor; 252. a second electromagnet; 253. a clutch device; 254. a first drive gear; 255. a second drive gear; 2531. a drive worm; 2532. a drive shaft; 2533. a clutch shaft fastener; 2534. a clutch shaft permanent magnet; 256. a chute plate; 257. a rack slider; 258. a rack crank; 259. the support frame drives the rack; 2311. a second rotating shaft; 241. a rotating part; 242. a circular arc-shaped gear section; 2561. z style of calligraphy spout.

Detailed Description

In order to better understand the technical solution, the technical solution will be described in detail with reference to the drawings and the specific embodiments.

As shown in fig. 1 to 4, a first embodiment of the present invention provides an automobile crane, which includes a carriage 10 and a gantry crane 20 disposed on the carriage 10, wherein the gantry crane 20 includes a crane body 21, a translational lifting mechanism 22, a rail 23, a support frame 24 and an unfolding and receiving driving mechanism 25, and the crane body 21 is connected to the support frame 24; the hanger body 21 can move horizontally relative to the rail 23; the translation hoisting mechanism 22 is arranged on the hanger body 21, and the rails 23 are laid on two sides of the carriage 10; the unfolding and folding driving mechanism 25 is respectively connected with the hanger body 21 and the support frame 24 and is used for respectively controlling the gantry hanger 20 or the support frame 24 to be in an unfolding and/or folding state, so that the gantry hanger 20 horizontally moves relative to the rail 23 during unfolding or is folded at the front end of the carriage 10 during folding; so that the support frame 24 moves out of the rail 23 when unfolded to be supported on the ground or is folded in the rail 23 when stored. The unfolding and folding drive mechanism 25 can adopt the existing folding and/or telescoping structure to unfold and/or fold the gantry 20. In this embodiment, the truck crane is a portable crane, and can be installed at both ends of a truck. State of the mobile crane in the retracted and extended state, see fig. 1 to 4, when the mobile crane is extended, the gantry crane 20 above the crane can be moved along the extended rails 23. And the support bracket 24 provided under the unfolded rail 23 supports the rail 23, thereby increasing the supporting strength.

In the above structure, referring to fig. 5 to 10, fig. 5 is a partially enlarged schematic view of a portion a in fig. 2, in this embodiment, the hanger body 21 is provided with a load-bearing rod 211, a support rod 212, and a gantry folding mechanism connected between the load-bearing rod 211 and the support rod 212, the gantry folding mechanism includes a first rotating arm 2131 disposed at an end of the load-bearing rod 211, a second rotating arm 2132 disposed at an end of the support rod 212, and a first rotating shaft 2133 and a folding driving mechanism mounted on the first rotating arm 2131 and the second rotating arm 2132, wherein the folding driving mechanism includes a folding gear 2341 disposed at the first rotating arm 2131, a folding worm 2342 disposed at the second rotating arm 2 and matched with the folding gear 2131, a speed reducer 2343 connected with the folding worm 2342, and a folding driving motor 2344 connected with the speed reducer 2343. Preferably, the gantry folding mechanism further comprises a worm locking assembly arranged below the folding worm 2342 and used for locking the gantry 20 in the extended state of the gantry 20, the worm locking assembly comprises a first worm locking block 2251, a second worm locking block 2252, a first locking elastic piece 2253 and a second locking elastic piece 2254, the folding worm 2342 comprises a worm wheel disc 23421 and a worm wheel shaft 23422 sleeved on the worm wheel disc 23421, the worm wheel shaft 23422 is arranged between the first worm locking block 2251 and the second worm locking block 2252, one end of the first worm locking block 2251 abuts against the first locking elastic piece 2253, and the other end of the first worm locking block 2251 extends out of the first rotating arm 2131; one end of the second worm locking block 2252 abuts against the second locking elastic member 2254, and the other end of the second worm locking block 2252 extends out of the second pivot arm 2132. The folding driving mechanism is further provided with an engaging block 2345 engaged with the first worm locking block 2251 and the second worm locking block 2252, when the engaging block is engaged with the first worm locking block 2251 and the second worm locking block 2252, the first locking elastic piece 2253 and the second locking elastic piece 2254 are compressed, the first worm locking block 2251 and the second worm locking block 2252 are engaged with each other to assume an open state, and at this time, a worm wheel shaft 23422 located between the first worm locking block 2251 and the second worm locking block 2252 is rotatable. The speed reducer 2343 adopts an inner hexagonal through hole speed reducer and is used for being directly matched with the worm wheel shaft 23422. In this embodiment, the first and second locking

elastic pieces

2253 and 2254 employ locking springs. The worm wheel shaft 23422 adopts a hexagonal shaft. When the hanger body 21 moves to the position close to the headstock, the hanger body will be close to the gantry folding mechanism, at this time, the first worm locking block 2251 and the second worm locking block 2252 on the hanger body 21 will be compressed inward by the folding driving mechanism, and at this time, the worm wheel shaft 23422 can rotate. Then, the folding driving motor 2344 and the speed reducer 2343 can drive the folding worm 2342 to rotate, so as to drive the bearing rod 211 to fold downwards. When the hanger body 21 is unfolded, since the hanger body 21 does not contact the engaging block 2345, the first worm locking block 2251 and the second worm locking block 2252 pop out under the action of the first locking elastic piece 2253 and the second locking elastic piece 2254, the worm wheel shaft 23422 located between the first worm locking block 2251 and the second worm locking block 2252 is locked, and the hanger body 21 is not bent, thereby protecting the safety of the mobile crane.

Further, referring to fig. 11 to 14, fig. 11 is a partially enlarged schematic view of a portion C in fig. 4, in this embodiment, the translational lifting mechanism 22 includes a first controller, a first electromagnet 222, a lifting lever 223, a lifting driving motor 224, a transposition gear 225, a horizontal moving device, and a vertical lifting device, the lifting driving motor 224 is connected to the transposition gear 225, the first controller is electrically connected to the first electromagnet 222 and the lifting driving motor 224 respectively, and is configured to control the first electromagnet 222 to attract or repel, so that the lifting lever 223 pulls the transposition gear 225 to move up and down, the transposition gear 225 is engaged with the horizontal moving device or the vertical lifting device, and power of the lifting driving motor 224 is transmitted to the horizontal moving device or the vertical lifting device, so that the horizontal moving device drives the horizontal moving device to move horizontally or the vertical lifting device to lift the goods to be transported. Specifically, the horizontal moving device includes a horizontal moving rack 2271, a horizontal moving gear 2272 and a horizontal moving platform 2273, the horizontal moving rack 2271 is transversely disposed on the gantry crane 20, the horizontal moving gear 2272 can horizontally move relative to the horizontal moving rack 2271, the horizontal moving gear 2272 is mounted on the horizontal moving platform 2273, and under the driving of the crane driving motor 224, the horizontal moving gear 2272 relatively moves on the horizontal moving rack 2271 to drive the horizontal moving platform 2273 to horizontally move on the gantry crane 20. The vertical hoisting device comprises a hoisting driving gear 2261, a winding drum 2262 and a steel wire rope 2263, wherein the hoisting driving gear 2261 is connected with the winding drum 2262, the steel wire rope 2263 is wound on the winding drum 2262, and the hoisting driving gear 2261 drives the winding drum 2262 to hoist the goods to be transported by the steel wire rope 2263 under the driving of the hoisting driving motor 224. The end of the wire rope 2263 is provided with a hoisting hook. In this embodiment, the horizontal movement and actuation of the translational lifting mechanism 22 share a common set of power. When the first electromagnet 222 is attracted, the shifting rod 223 shifts the transposition gear 225 upwards, at the moment, the power is transmitted to the horizontal moving gear 2272, and the hoisting device can move left and right. When the first electromagnet 222 is repelled, the shift lever 223 moves downward, and the transposition gear 225 transmits power to the hoisting driving gear 2261, and the reel 2262 drives the wire cable 2263 to hoist the goods. When the hoist driving motor 224 does not drive the reel 2262, a self-locking mechanism is provided inside the reel 2262, and the reel 2262 does not operate, thereby preventing the goods from falling. Preferably, a self-locking device is arranged inside the reel 2262, the self-locking device comprises inner limiting teeth 2281, a reel buckle 2282 and a locking spring 2283, the inner limiting teeth 2281 are sleeved on the reel 2262 and rotate relative to the reel 2262, and the locking spring 2283 is positioned between the reel 2262 and the inner limiting teeth 2281; the reel 2262 is provided with a positioning hole, and the reel buckle 2282 penetrates through the positioning hole and then abuts against the inner limiting tooth 2281, so that the reel 2262 is clamped with the inner limiting tooth 2281. The self-locking device is divided into an inner limiting tooth 2281, a winding drum buckle 2282 and a locking spring 2283. When the hoist drive gear 2261 is at rest, the hoist drive gear 2261 may press the spool catch 2282 into the inner limit teeth 2281 due to the spring force of the locking spring 2283, at which point the spool 2262 may not rotate. When the jack drive gear 2261 is actuated to rotate, the spool catch 2282 springs out the inner limit teeth 2281, which allows the jack drive gear 2261 to rotate along with the spool 2262.

Preferably, referring to fig. 15 to 17, fig. 15 is a schematic structural view of the third embodiment of the gantry crane shown in fig. 1 when being stored, on the basis of the first embodiment, the track 23 includes a first guide rail 231 and a second guide rail 232, the unfolding and folding driving mechanism 25 includes a second controller, a guide rail driving motor 251, a second electromagnet 252, a clutch device 253, a first transmission mechanism and a second transmission mechanism, the first transmission mechanism is connected with the first guide rail 231, the second transmission mechanism is connected with the second guide rail 232, the second controller is respectively electrically connected with the second electromagnet 252 and the guide rail driving motor 251, the second electromagnet 252 is used for controlling the clutch device 253 to attract or repel, so that the clutch device 253 is matched with the first transmission mechanism and/or the second transmission mechanism, and the first transmission mechanism drives the first guide rail 231 and/or the second transmission mechanism drives the second guide rail 232 to move. Further, the first transmission mechanism includes a first driving gear 254, the second transmission mechanism includes a second driving gear 255, the first driving gear 254 is engaged with the first guide rail 231, and the second driving gear 255 is engaged with the second guide rail 232; the clutch device 253 comprises a driving worm 2531, a driving shaft 2532, a clutch shaft buckle 2533 and a clutch shaft permanent magnet 2534, the driving worm 2531 is connected with the main shaft of the guide rail driving motor 251, the clutch shaft permanent magnet 2534 is arranged at the end part of the driving shaft 2532 and is opposite to the second electromagnet 252, and the clutch shaft buckle 2533 is connected with the driving shaft 2532. In the present embodiment, the expansion of the first rail 231, the second rail 232, and the forward and backward movement of the hanger body 21 are powered by a set of mechanisms. The mechanism is provided with a clutch device 253, when the guide rail driving motor 251 rotates, only the first driving gear 254 can be selectively driven, and the first driving gear 254 and the second driving gear 255 can be simultaneously driven, when only the first driving gear 254 is driven, the first guide rail 231 can extend and contract. When the first driving gear 254 and the second driving gear 255 are simultaneously driven, the first guide rail 231 and the second guide rail 232 are fixed, and the hanger body 21 moves along the guide rails. The clutch shaft catch 2533 on the drive shaft 2532 engages the first drive gear 254 and the second drive gear 255 by the second electromagnet 252 attracting and repelling the clutch shaft. The driving shaft 2532 transmits power to the first driving gear 254 or the second driving gear 255, and the driving shaft 2532 is connected to the guide driving motor 251 through the driving worm 2531 to obtain power. Specifically, the unfolding and accommodating driving mechanism 25 further comprises a support frame telescopic assembly, the support frame telescopic assembly comprises a chute plate 256, a rack slider 257, a rack crank 258 and a support frame driving rack 259, a second rotating shaft 2311 is arranged on the first guide rail 231, a rotating part 241 rotatably connected with the second rotating shaft 2311 is correspondingly arranged on the support frame 24, and a circular arc-shaped gear tooth section 242 matched with the support frame driving rack 259 is arranged on the rotating part 241; the rack crank 258 is fixedly arranged on the support frame driving rack 259, the chute plate 256 is provided with a Z-shaped chute 2561, one end of the rack sliding block 257 is in lap joint with the Z-shaped chute 2561, and the other end of the rack sliding block 257 is in lap joint with the rack crank 258. The first guide rail 231 is a fixed guide rail, and has a sliding groove plate 256 thereon, and the sliding groove plate 256 is provided with a Z-shaped sliding groove 2561. When the first guide rail 231 is unfolded, the rack slider 257 moves up and down along the zigzag sliding groove 2561, and at this time, the rack crank 258 moves rightward, and the support frame 24 connected with the rack crank is unfolded. The support 24 is closed when the steel rails are retracted.

Referring to fig. 1 to 17, the working principle of the crane provided in this embodiment is as follows:

when the hanger body 21 moves to the position close to the headstock, the hanger body will be close to the gantry folding mechanism, at this time, the first worm locking block 2251 and the second worm locking block 2252 on the hanger body 21 will be compressed inward by the folding driving mechanism, and at this time, the worm wheel shaft 23422 can rotate. Then, the folding driving motor 2344 and the speed reducer 2343 can drive the folding worm 2342 to rotate, so as to drive the bearing rod 211 to fold downwards. When the hanger body 21 is unfolded, since the hanger body 21 does not contact the engaging block 2345, the first worm locking block 2251 and the second worm locking block 2252 pop out under the action of the first locking elastic piece 2253 and the second locking elastic piece 2254, the worm wheel shaft 23422 located between the first worm locking block 2251 and the second worm locking block 2252 is locked, and the hanger body 21 is not bent, thereby protecting the safety of the mobile crane.

The horizontal movement and actuation of the translational lifting mechanism 22 share a common set of power. When the first electromagnet 222 is attracted, the shifting rod 223 shifts the transposition gear 225 upwards, at the moment, the power is transmitted to the horizontal moving gear 2272, and the hoisting device can move left and right. When the first electromagnet 222 is repelled, the shift lever 223 moves downward, and the transposition gear 225 transmits power to the hoisting driving gear 2261, and the reel 2262 drives the wire cable 2263 to hoist the goods. When the hoist driving motor 224 does not drive the reel 2262, a self-locking mechanism is provided inside the reel 2262, and the reel 2262 does not operate, thereby preventing the goods from falling.

When the first guide rail 231 is unfolded, the rack slider 257 moves up and down along the zigzag sliding groove 2561, and at this time, the rack crank 258 moves rightward, and the support frame 24 connected with the rack crank is unfolded. The support 24 is closed when the steel rails are retracted.

Compared with the prior art, the automobile crane provided by the embodiment adopts a gantry crane structure, uses the hanger body, the translation hoisting mechanism, the track, the support frame and the unfolding and folding driving mechanism, and respectively controls the gantry hanger or the support frame to be in an unfolding and/or folding state through the unfolding and folding driving mechanism, so that the gantry hanger horizontally moves relative to the track when unfolded or is folded at the front end of the carriage when folded; the support frame is moved out of the track when being unfolded so as to be supported on the ground or is folded in the track when being stored. The automobile crane provided by the embodiment has high automation degree and good safety; the use is convenient, and the working efficiency is improved; the space is not occupied when the automobile is stored, and the space of the automobile compartment is saved.

While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention. It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. The automobile crane is characterized by comprising a carriage (10) and a gantry crane (20) arranged on the carriage (10), wherein the gantry crane (20) comprises a crane body (21), a translation hoisting mechanism (22), a track (23), a support frame (24) and an unfolding and containing driving mechanism (25), and the crane body (21) is connected with the support frame (24); the hanger body (21) can move horizontally relative to the track (23); the translation hoisting mechanism (22) is arranged on the hanger body (21), and the rails (23) are laid on two sides of the carriage (10); the unfolding and folding driving mechanism (25) is respectively connected with the hanger body (21) and the support frame (24) and is used for respectively controlling the gantry hanger (20) or the support frame (24) to be in an unfolding and/or folding state, so that the gantry hanger (20) horizontally moves relative to the track (23) when being unfolded or is folded at the front end of the carriage (10) when being folded; the support frame (24) is moved out of the rail (23) when being unfolded so as to be supported on the ground or is folded in the rail (23) when being stored.

2. Mobile crane according to claim 1,

the hanger body (21) is provided with a bearing rod (211), a support rod (212) and a portal frame folding mechanism connected between the bearing rod (211) and the support rod (212), the portal frame folding mechanism comprises a first rotating arm (2131) arranged on the end part of the bearing rod (211), a second rotating arm (2132) arranged on the end part of the supporting rod (212), a first rotating shaft (2133) and a folding driving mechanism, wherein the first rotating shaft (2133) and the folding driving mechanism are arranged on the first rotating arm (2131) and the second rotating arm (2132), the folding driving mechanism comprises a folding gear (2341) arranged at the first rotating arm (2131), a folding worm (2342) arranged at the second rotating arm (2132) and matched with the folding gear (2341), a speed reducer (2343) connected with the folding worm (2342), and a folding driving motor (2344) connected with the speed reducer (2343).

3. Mobile crane according to claim 2,

the portal frame folding mechanism further comprises a worm locking assembly arranged below the folding worm (2342) and used for locking the portal frame (20) in an extending state of the portal frame (20), wherein the worm locking assembly comprises a first worm locking block (2251), a second worm locking block (2252), a first locking elastic piece (2253) and a second locking elastic piece (2254), the folding worm (2342) comprises a worm wheel disc (23421) and a worm wheel shaft (23422) sleeved on the worm wheel disc (23421), the worm wheel shaft (23422) is arranged between the first worm locking block (2251) and the second worm locking block (2252), one end of the first worm locking block (2251) abuts against the first locking elastic piece (2253), and the other end of the first worm locking block (1) extends out of the first rotating arm (2131); one end of the second worm locking block (2252) abuts against the second locking elastic part (2254), and the other end of the second worm locking block (2252) extends out of the second rotating arm (2132).

4. Mobile crane according to claim 1,

the translation lifting mechanism (22) comprises a first controller, a first electromagnet (222), a shift lever (223), a lifting driving motor (224), a transposition gear (225), a horizontal moving device and a vertical lifting device, wherein the lifting driving motor (224) is connected with the transposition gear (225),

the first controller is respectively electrically connected with the first electromagnet (222) and the hoisting driving motor (224) and is used for controlling the first electromagnet (222) to attract or repel so that the shifting rod (223) shifts the shifting gear (225) to move up and down, the shifting gear (225) is meshed with the horizontal moving device or the vertical hoisting device, the power of the hoisting driving motor (224) is transmitted to the horizontal moving device or the vertical hoisting device, and the horizontal moving device drives the horizontal moving device to move horizontally or the vertical hoisting device to hoist the goods to be transported.

5. Mobile crane according to claim 4,

the horizontal moving device comprises a horizontal moving rack (2271), a horizontal moving gear (2272) and a horizontal moving platform (2273), the horizontal moving rack (2271) is transversely arranged on the gantry crane (20), the horizontal moving gear (2272) can horizontally move relative to the horizontal moving rack (2271), the horizontal moving gear (2272) is arranged on the horizontal moving platform (2273), and the horizontal moving gear (2272) is driven by the hoisting driving motor (224) to relatively move on the horizontal moving rack (2271) so as to drive the horizontal moving platform (2273) to horizontally move on the gantry crane (20).

6. Mobile crane according to claim 4,

the vertical hoisting device comprises a hoisting driving gear (2261), a winding drum (2262) and a steel wire rope (2263), wherein the hoisting driving gear (2261) is connected with the winding drum (2262), the steel wire rope (2263) is wound on the winding drum (2262), and the hoisting driving gear (2261) rotates the winding drum (2262) under the driving of a hoisting driving motor (224) so as to hoist the goods to be transported by the steel wire rope (2263).

7. Mobile crane according to claim 6,

a self-locking device is arranged inside the winding drum (2262), the self-locking device comprises an inner limiting tooth (2281), a winding drum buckle (2282) and a locking spring (2283), the inner limiting tooth (2281) is sleeved on the winding drum (2262) and rotates relative to the winding drum (2262), and the locking spring (2283) is positioned between the winding drum (2262) and the inner limiting tooth (2281); the winding drum (2262) is provided with a positioning hole, and the winding drum buckle (2282) penetrates through the positioning hole and then abuts against the inner limiting tooth (2281) so as to clamp the winding drum (2262) and the inner limiting tooth (2281).

8. Mobile crane according to claim 1,

the track (23) comprises a first guide rail (231) and a second guide rail (232), the unfolding and folding driving mechanism (25) comprises a second controller, a guide rail driving motor (251), a second electromagnet (252), a clutch device (253), a first transmission mechanism and a second transmission mechanism, the first transmission mechanism is connected with the first guide rail (231), the second transmission mechanism is connected with the second guide rail (232),

the second controller is electrically connected with the second electromagnet (252) and the guide rail driving motor (251) respectively and is used for controlling the second electromagnet (252) to attract or repel the clutch device (253), so that the clutch device (253) is matched with the first transmission mechanism and/or the second transmission mechanism, and the first transmission mechanism drives the first guide rail (231) and/or the second transmission mechanism drives the second guide rail (232) to move.

9. Mobile crane according to claim 8,

the first transmission mechanism comprises a first driving gear (254), the second transmission mechanism comprises a second driving gear (255), the first driving gear (254) is meshed with the first guide rail (231), and the second driving gear (255) is meshed with the second guide rail (232); the clutch device (253) comprises a driving worm (2531), a driving shaft (2532), a clutch shaft buckle (2533) and a clutch shaft permanent magnet (2534), the driving worm (2531) is connected with a main shaft of the guide rail driving motor (251), the clutch shaft permanent magnet (2534) is arranged at the end part of the driving shaft (2532) and is opposite to the second electromagnet (252), and the clutch shaft buckle (2533) is connected to the driving shaft (2532).

10. Mobile crane according to claim 8,

the unfolding and accommodating driving mechanism (25) further comprises a support frame telescopic assembly, the support frame telescopic assembly comprises a sliding chute plate (256), a rack sliding block (257), a rack crank (258) and a support frame driving rack (259), a second rotating shaft (2311) is arranged on the first guide rail (231), a rotating part (241) which is rotatably connected with the second rotating shaft (2311) is correspondingly arranged on the support frame (24), and a circular arc-shaped gear section (242) matched with the support frame driving rack (259) is arranged on the rotating part (241); the rack crank (258) is fixedly arranged on the support frame driving rack (259), a Z-shaped sliding groove (2561) is formed in the sliding groove plate (256), one end of the rack sliding block (257) is in lap joint with the Z-shaped sliding groove (2561), and the other end of the rack sliding block (257) is in lap joint with the rack crank (258).