CN112357786A

CN112357786A - Long-distance hoisting equipment

Info

Publication number: CN112357786A
Application number: CN202011346673.4A
Authority: CN
Inventors: 彭莉珊; 何健洪; 李丽丽
Original assignee: Hangzhou Fuchun Industry Co ltd
Current assignee: Hangzhou Fuchun Industry Co ltd
Priority date: 2020-11-26
Filing date: 2020-11-26
Publication date: 2021-02-12

Abstract

The invention belongs to the field of cranes, and particularly relates to long-distance hoisting equipment which comprises a trolley body, a support rod, a slide block A, a spring A, a hydraulic column, a support sleeve, a slide block B, a spring B and a universal wheel mechanism, wherein the support rod is in sliding fit with the support sleeve nested on the support rod; when the crane body is used for hoisting objects with longer distance, the whole position of the crane body is not required to be adjusted, and the objects with longer distance can be sequentially drawn and hoisted only by the telescopic arm, the support rod and the support sleeve which are arranged on the tail end section of the telescopic arm and are in sliding fit with each other.

Description

Long-distance hoisting equipment

Technical Field

The invention belongs to the field of cranes, and particularly relates to long-distance hoisting equipment.

Background

The Crane is a common name of a Crane, and the Crane (Crane) is one of hoisting machines and is a machine which does cyclic and intermittent motion. One cycle of operation includes the picking device lifting the article from the picking location and then moving horizontally to the desired location to lower the article, followed by a reverse motion to return the picking device to its original position for the next cycle.

The conventional crane mainly includes a crane having a telescopic boom, and the telescopic boom crane extends the telescopic boom to perform a lifting operation during use. Traditional flexible arm crane can't carry out effectual lifting by crane to the article far away from crane own distance, but must just lift by crane the article far away from through the position of whole removal crane, and this kind of efficiency to the mode of lifting by crane of remote article is lower, and is inconvenient.

Therefore, it is necessary to design a hoisting device capable of effectively hoisting an object far away from the hoisting device.

The invention designs long-distance hoisting equipment to solve the problems.

Disclosure of Invention

In order to overcome the defects in the prior art, the invention discloses long-distance hoisting equipment which is realized by adopting the following technical scheme.

In the description of the present invention, it should be noted that the terms "inside", "outside", "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the present invention conventionally use, which are merely for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, or be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

A long-distance hoisting device comprises a vehicle body, a support rod, a slide block A, a spring A, a hydraulic column, a support sleeve, a slide block B, a spring B and a universal wheel mechanism, wherein the support rod is in sliding fit with the support sleeve nested on the support rod; a pressure sensor for sensing the pressure change of the spring A is arranged in the sliding block B; four universal wheel mechanisms matched with the ground are symmetrically arranged at the tail end of the supporting sleeve; the support rod is hinged with a fixed rod vertically arranged on the section at the tail end of a telescopic arm of the crane, and a hydraulic column arranged on the section at the tail end of the telescopic arm drives the support rod to swing around the fixed rod.

One end of the hydraulic column is hinged with one section of the tail end of the telescopic arm, and the other end of the hydraulic column is hinged with a sliding block A which slides on the side wall of the supporting rod along the relative telescopic direction of the supporting rod and the supporting sleeve; a spring A for resetting the sliding block A is arranged on the sliding block A; a structure for locking the unfolding and the recovery states of the supporting rod and the fixed rod is arranged between the supporting rod and the fixed rod, and the structure is driven by a sliding block A; the support sleeve is internally provided with a structure for automatically adjusting the compression amount of the spring A according to the weight of the hoisted heavy object.

As a further improvement of the technology, the universal wheel mechanism comprises a fixed sleeve, a rotating shaft B, a long square frame, a sliding block C, a roller and a fixed shaft, wherein the fixed sleeve is arranged on a base at the tail end of a supporting sleeve, the rotating shaft B is rotatably matched in the fixed sleeve, and a circular ring arranged on the rotating shaft B rotates in a circular groove on the inner wall of the fixed sleeve. The ring B ensures that the rotating shaft B and the fixed sleeve only rotate relatively and do not move axially relatively. The tail end of the rotating shaft B is provided with a long square frame, and a sliding block C is in sliding fit in the long square frame along the horizontal direction; two guide blocks B are symmetrically arranged on the sliding block C and respectively slide in two guide grooves B on the inner wall of the rectangular frame. The guide block B is matched with the guide groove B to play a positioning and guiding role in the sliding of the sliding block C in the rectangular frame. Two fixed shafts are symmetrically arranged on two sides of the sliding block C, and each fixed shaft is provided with a roller matched with the ground.

As a further improvement of the technology, a fixed block B is arranged on the sliding block B and moves in a movable groove on the side wall of the support sleeve; a steel wire rope is wound on a winding wheel arranged on the outer side of the supporting sleeve, and one end of the steel wire rope is connected with a fixed block B by winding a fixed pulley arranged on the outer side of the supporting sleeve; the winding wheel which is rotationally matched with the shaft is fixedly connected with a coaxial gear B through a shaft sleeve; a rotating shaft A is rotatably matched on a support A arranged on the outer side of the supporting sleeve, and a gear C arranged on the rotating shaft A is meshed with a gear B; two supports B arranged on the outer side of the supporting sleeve are rotatably matched with worms, and the worms are meshed with worm wheels arranged on the rotating shaft A; and the output shaft of the electric drive module arranged on the support sleeve is provided with a gear E, and the gear E is meshed with a gear D arranged at one end of the worm.

As a further improvement of the technology, a rack A slides in the support rod along the relative telescopic direction of the support rod and the support sleeve, the rack A is fixedly connected with a slide block A, and the rack A and a rack B which slides in the support rod in parallel with the rack A are simultaneously meshed with a gear A arranged in the support rod; one end of the rack B is matched with two limiting grooves which are arranged on the arc surface at the tail end of the fixed rod and are 90 degrees away from the radian, so that the supporting rod is locked relative to the unfolding state and the recovery state of the fixed rod.

As a further improvement of the technology, the gear A rotates in a containing groove in the support rod, the rack A slides in a sliding groove A in the support rod, and the rack B slides in a sliding groove B in the support rod. The holding tank provides accommodation space for gear A, and spout A plays the location guide effect to rack A's motion in the bracing piece, and spout B plays the location guide effect to rack B's motion in the bracing piece.

As a further improvement of the technology, the support rod is symmetrically provided with two guide blocks A, and the two guide blocks A respectively slide in two guide grooves A on the inner wall of the support sleeve. The cooperation of guide block A and guide way A plays the positioning guide effect to the relative sliding fit of bracing piece and support cover, guarantees simultaneously that the bracing piece can not break away from and supports the cover. The fixed rod is provided with a limit swing rod matched with the supporting rod, and the limit swing rod limits the expansion range of the supporting sleeve and the supporting rod relative to the fixed rod, so that the supporting rod only swings for 90 degrees from a recovery state to an expansion state, and the supporting rod and the supporting sleeve are guaranteed to effectively support the crane telescopic arm. A trapezoidal guide block is arranged on the sliding block A and slides in a trapezoidal guide groove on the supporting rod. The trapezoidal guide block is matched with the trapezoidal guide groove to play a positioning and guiding role in the sliding of the sliding block A on the side wall of the supporting rod. The spring A is an extension spring; one end of the spring A is connected with a fixed block A arranged on the supporting rod, and the other end of the spring A is connected with the sliding block A; the spring a is always in tension.

Compared with the traditional crane, the invention does not need to adjust the integral position of the crane body when hoisting the objects with longer distance, and can finish the drawing and hoisting of the objects with longer distance in turn only by the telescopic arm, the support rod and the support sleeve which are arranged on the tail end section of the telescopic arm and are mutually matched in a sliding way.

In addition, in the process of hoisting and pulling far-distance objects to the near part, the telescopic structure formed by the support rod and the support sleeve arranged on the section at the tail end of the telescopic arm can automatically adjust the supporting force of the telescopic arm according to the weight of a hoisted heavy object, so that the telescopic structure formed by the support rod and the support sleeve can always effectively support the telescopic arm, the telescopic arm is prevented from deforming due to the fact that the strength of the telescopic arm in an extension state is weak when the telescopic arm hoists the far-distance objects, and the service life of the telescopic arm is prolonged. The invention has simple structure and better use effect.

Drawings

Fig. 1 is a schematic view of the invention from two general perspectives.

Fig. 2 is a schematic cross-sectional view of the fixed rod, the support rod, the slider a, the rack a, the gear a and the rack B.

Fig. 3 is a schematic cross-sectional view of the support rod, the support sleeve and the slider B.

Fig. 4 is a schematic view of a fixation rod.

Fig. 5 is a schematic diagram of the transmission structure outside the support sleeve from two visual angles.

Fig. 6 is a schematic cross-sectional view of the winding wheel, the shaft sleeve, the gear B, the gear C, the rotating shaft A, the worm wheel, the worm, the gear D, the gear E and the electric drive module.

FIG. 7 is a schematic view of the universal wheel mechanism.

FIG. 8 is a schematic cross-sectional view of the gimbal mechanism from two perspectives.

Fig. 9 is a schematic cross-sectional view of a support sleeve and its components.

Figure 10 is a schematic view of a brace and a partial cross-section thereof.

Fig. 11 is a schematic cross-sectional view of the support rod, the slide block a and the hydraulic column.

Number designation in the figures: 1. a vehicle body; 2. a telescopic arm; 3. hooking; 4. fixing the rod; 5. a limiting groove; 6. a support bar; 7. a trapezoidal guide groove; 8. a chute A; 9. a chute B; 10. accommodating grooves; 11. a guide block A; 12. a slide block A; 13. a trapezoidal guide block; 14. a rack A; 15. a gear A; 16. a rack B; 17. a spring A; 18. a fixed block A; 19. a hydraulic column; 20. a swing limiting rod; 21. a support sleeve; 22. a guide groove A; 23. a movable groove; 24. a slide block B; 25. a spring B; 26. a fixed block B; 27. a wire rope; 28. a fixed pulley; 29. a winding wheel; 30. a shaft sleeve; 31. a gear B; 32. a gear C; 33. a rotating shaft A; 34. a support A; 35. a worm gear; 36. a worm; 37. a support B; 38. a gear D; 39. a gear E; 40. an electric drive module; 41. a base; 42. a universal wheel mechanism; 43. fixing a sleeve; 44. a rotating shaft B; 45. a circular ring; 46. a long square frame; 47. a guide groove B; 48. a slider C; 49. a guide block B; 50. a fixed shaft; 51. and a roller.

Detailed Description

The drawings are schematic illustrations of the implementation of the present invention to facilitate understanding of the principles of structural operation. The specific product structure and the proportional size are determined according to the use environment and the conventional technology.

As shown in fig. 1 and 5, the vehicle comprises a vehicle body 1, a support rod 6, a slide block a12, a spring a17, a hydraulic column 19, a support sleeve 21, a slide block B24, a spring B25 and a universal wheel mechanism 42, wherein as shown in fig. 3, the support rod 6 is in sliding fit with the support sleeve 21 nested on the support rod 6, the slide block B24 is in sliding fit in the support sleeve 21 along the relative telescopic direction of the support rod 6 and the support sleeve 21, and the slide block B24 is connected with the support rod 6 through a compressed spring B25; a pressure sensor which senses the pressure change of the spring A17 is arranged in the sliding block B24; as shown in fig. 3 and 5, four universal wheel mechanisms 42 matched with the ground are symmetrically arranged at the tail end of the support sleeve 21; as shown in fig. 1, a support rod 6 is hinged with a fixed rod 4 vertically arranged on the most tail end of a telescopic arm 2 of a crane; as shown in fig. 1, 2 and 5, the support rod 6 is driven by a hydraulic column 19 mounted on the most distal section of the telescopic arm 2 to swing around the fixed rod 4.

As shown in fig. 1 and 2, one end of the hydraulic column 19 is hinged with the most tail end of the telescopic arm 2, and the other end is hinged with a slide block a12 which slides on the side wall of the support rod 6 along the relative telescopic direction of the support rod 6 and the support sleeve 21; a spring A17 for resetting the sliding block A12 is arranged on the sliding block A12; a structure for locking the unfolding and the recovery states of the supporting rod 6 and the fixed rod 4 is arranged between the supporting rod and the fixed rod, and the structure is driven by a slide block A12; as shown in fig. 3 and 5, the support sleeve 21 has a structure for automatically adjusting the compression amount of the spring a17 according to the weight of the lifted weight.

As shown in fig. 7 and 8, the universal wheel mechanism 42 includes a fixing sleeve 43, a rotating shaft B44, a rectangular frame 46, a slider C48, a roller 51, and a fixing shaft 50, wherein as shown in fig. 5 and 8, the fixing sleeve 43 is mounted on the base 41 at the end of the supporting sleeve 21, the rotating shaft B44 is rotatably fitted in the fixing sleeve 43, and the circular ring 45 mounted on the rotating shaft B44 rotates in a circular groove on the inner wall of the fixing sleeve 43. The ring 45B ensures that the rotating shaft B44 and the fixing sleeve 43 only rotate relatively and do not move axially relatively. The tail end of the rotating shaft B44 is provided with a long frame 46, and a sliding block C48 is matched in the long frame 46 in a sliding way along the horizontal direction; two guide blocks B49 are symmetrically installed on the sliding block C48, and the two guide blocks B49 slide in two guide grooves B47 on the inner wall of the rectangular frame 46 respectively. The engagement of the guide block B49 with the guide groove B47 serves as a positioning guide for the sliding movement of the slider C48 within the rectangular frame 46. Two fixed shafts 50 are symmetrically arranged on two sides of the sliding block C48, and each fixed shaft 50 is provided with a roller 51 matched with the ground.

As shown in fig. 3, 5 and 9, a fixed block B26 is mounted on the sliding block B24, and a fixed block B26 moves in the movable groove 23 on the side wall of the support sleeve 21; as shown in fig. 3, 5 and 6, a wire rope 27 is wound on a winding wheel 29 arranged on the outer side of the support sleeve 21, and one end of the wire rope 27 is connected with a fixed block B26 by passing through a fixed pulley 28 arranged on the outer side of the support sleeve 21; the winding wheel 29 which is in rotary fit with the shaft is fixedly connected with a coaxial gear B31 through a shaft sleeve 30; a rotating shaft A33 is rotatably matched on a support A34 arranged on the outer side of the support sleeve 21, and a gear C32 arranged on the rotating shaft A33 is meshed with a gear B31; two supports B37 arranged on the outer side of the support sleeve 21 are rotatably matched with a worm 36, and the worm 36 is meshed with a worm wheel 35 arranged on a rotating shaft A33; the output shaft of the electric drive module 40 mounted on the support sleeve 21 is provided with a gear E39, and the gear E39 is meshed with a gear D38 mounted at one end of the worm 36.

As shown in fig. 2, a rack a14 slides in the support bar 6 along the relative extension direction of the support bar 6 and the support sleeve 21, the rack a14 is fixedly connected with a slide block a12, and the rack a14 and a rack B16 sliding in the support bar 6 parallel to the rack a14 are simultaneously meshed with a gear a15 installed in the support bar 6; as shown in fig. 2 and 4, one end of the rack B16 is engaged with two limiting grooves 5 formed on the arc surface of the end of the fixing lever 4 at an angle of 90 degrees from the arc surface, so as to lock the expansion state and the recovery state of the supporting lever 6 with respect to the fixing lever 4.

As shown in fig. 2 and 10, the gear a15 rotates in the receiving groove 10 of the supporting rod 6, the rack a14 slides in the sliding groove A8 of the supporting rod 6, and the rack B16 slides in the sliding groove B9 of the supporting rod 6. The accommodating groove 10 provides an accommodating space for the gear a15, the sliding groove A8 plays a positioning and guiding role in the movement of the rack a14 in the supporting rod 6, and the sliding groove B9 plays a positioning and guiding role in the movement of the rack B16 in the supporting rod 6.

As shown in fig. 3 and 9, two guide blocks a11 are symmetrically mounted on the support rod 6, and the two guide blocks a11 slide in two guide grooves a22 on the inner wall of the support sleeve 21. The cooperation of the guide block a11 and the guide groove a22 plays a positioning and guiding role in the relative sliding fit between the support bar 6 and the support sleeve 21, and simultaneously ensures that the support bar 6 cannot be separated from the support sleeve 21. As shown in fig. 2, the fixed rod 4 is provided with a swing limiting rod 20 engaged with the supporting rod 6, and the swing limiting rod 20 limits the expansion range of the supporting sleeve 21 and the supporting rod 6 relative to the fixed rod 4, so that the supporting rod 6 only swings 90 degrees from the recovery state to the expansion state, and the supporting rod 6 and the supporting sleeve 21 are ensured to effectively support the crane telescopic arm 2. As shown in fig. 10 and 11, the trapezoidal guide block 13 is mounted on the slide block a12, and the trapezoidal guide block 13 slides in the trapezoidal guide groove 7 of the support bar 6. The cooperation of the trapezoidal guide block 13 and the trapezoidal guide groove 7 plays a positioning and guiding role in the sliding of the slide block A12 on the side wall of the support bar 6. As shown in fig. 2, spring a17 is an extension spring; one end of the spring A17 is connected with a fixed block A18 arranged on the support rod 6, and the other end is connected with a sliding block A12; spring a17 is always in tension.

The electric drive module 40 of the present invention is comprised of a servo motor, a reducer and a control unit.

The worm wheel 35 and the worm 36 in the invention have self-locking function, and the sliding block B24 can not move randomly under the pulling of the steel wire rope 27.

The working process of the invention is as follows: in the initial state, the telescopic boom 2 is retracted into the crane, the support rod 6 and the support sleeve 21 are in the retracted state parallel to the telescopic boom 2, and the hydraulic column 19 is in the shortest retracted state. The tail end of the rack B16 is inserted into a limiting groove 5 on the cambered surface of the round end of the fixed rod 4 to lock the recovery state of the support rod 6 relative to the fixed rod 4. The sliding block B24 is positioned at the bottom of the supporting sleeve 21, and the steel wire rope 27 is always in a tensioning state. Spring A17 is in tension and spring B25 is in compression.

When the invention is needed to hoist dispersed articles far away from a crane, the telescopic arm 2 is slightly lifted and swung out of the crane and extends to an article placing position, the control system controls the hydraulic column 19 to extend, the extended hydraulic column 19 firstly drives the sliding block A12 to slide from one side of the support sleeve 21 to one side of the fixed rod 4, the spring A17 releases energy and contracts, and the sliding block A12 drives the tail end of the rack B16 to be separated from the limiting groove 5 on the round-head cambered surface of the fixed rod 4 through the rack A14 and the gear A15 and releases the locking of the swinging of the supporting rod 6 relative to the fixed rod 4. When the slide block A12 slides along the outer side of the support rod 6 to the limit position, the continuously extending hydraulic column 19 drives the support rod 6 and the support sleeve 21 to swing and expand in the direction perpendicular to the telescopic arm 2 through the slide block A12.

With the continued extension of the hydraulic column 19 and the relative swinging of the hydraulic column 19 and the support rod 6, when the hydraulic column 19 crosses the vertical state with the support rod 6, the continued extension of the hydraulic column 19 drives the sliding block a12 to slide along the outer side of the support rod 6 from the side of the fixed rod 4 to the direction of the support sleeve 21, and the spring a17 is further stretched to store energy. The slide block A12 drives one end of the rack B16 to abut against the round head cambered surface of the fixed rod 4 through the rack A14 and the gear A15. With the swinging of the support bar 6, one end of the rack B16 is slidingly rubbed with the round head arc surface of the fixed bar 4.

When the support rod 6 and the support sleeve 21 swing to a state perpendicular to the telescopic arm 2 along with the extension of the hydraulic column 19, one end of the rack B16 is just opposite to the other limit groove 5 on the round-head cambered surface of the fixed rod 4, the support rod 6 abuts against the limit swing rod 20 and stops swinging, the hydraulic column 19 which continues to extend drives the slide block A12 to continue to slide from one side of the fixed rod 4 to the direction of the support sleeve 21, and the slide block A12 is inserted into the other limit groove 5 on the round-head cambered surface of the fixed rod 4 through one end of a series of driving racks B16 and locks the perpendicular state of the fixed rod 4 and the support rod 6. When the movement of the rack B16 reaches a limit, the slide of the slider a12 to the side of the support sleeve 21 reaches a limit, and the extension of the hydraulic cylinder 19 stops.

Then, the crane controls the telescopic arm 2 to swing to a horizontal state, and the hook 3 positioned right above the article is released downward and hooked on the article. Meanwhile, the support sleeve 21 moves vertically upwards relative to the support rod 6 under the pressing of the ground, the spring A17 is further compressed to store energy, the spring A17 supports the telescopic arm 2 in the extension state through the moment generated by the support force of the support rod 6 to the telescopic arm 2, and the telescopic arm 2 in the extension state is prevented from deforming under the action of the moment generated by self weight.

Then, the control system controls the crane to lift the article hooked by the hook 3 off the ground by recovering the steel wire on the hook 3, in the process that the article is lifted off the ground, the vertical downward pulling force applied to the tail end of the telescopic arm 2 is gradually increased, along with the increase of the pulling force applied to the tail end of the telescopic arm 2 in the horizontal state, the telescopic arm 2 is slightly deformed under the action of the article to drive the pressure of the support rod 6 on the spring A17 to be increased through the fixed rod 4, the spring A17 is gradually compressed and stored with energy, the pressure sensor in the sliding block B24 senses the increase of the acting force of the spring A17 and generates an electric signal, the control system receives the electric signal generated by the pressure sensor and controls the electric driving module 40 to operate, the electric driving module 40 drives the winding wheel 29 to rapidly rotate through the gear E39, the gear D38, the worm 36, the worm wheel 35, the rotating shaft A33, the gear C32, the gear B31 and the shaft sleeve 30, the steel wire rope 27 pulls the sliding block B24 to vertically move upwards in the supporting sleeve 21 through the fixing block B26 and further compress the spring A17, the elastic force generated by the further compressed spring A17 is balanced and offset with the moment generated by an article on the telescopic arm 2, and the deformation of the telescopic arm 2 in a horizontal extension state due to the gravity action of the article is weakened to the maximum extent, so that the telescopic arm 2 in the horizontal extension state is prevented from deforming in the process of lifting the article off the ground, the telescopic arm 2 is protected from being damaged, and the service life of the telescopic arm 2 is prolonged.

When the moment generated to the telescopic arm 2 by the elastic force generated by the further compression of the spring a17 is equal to the moment generated to the telescopic arm 2 by the article lifted off the ground, the control system controls the electric drive module 40 to stop running. Because the worm wheel 35 has a self-locking function in cooperation with the worm 36, the sliding block B24 cannot move vertically downwards under the action of the spring A17, so that the compression elasticity of the spring A17 is kept unchanged, and the balance between the moment generated by the spring A17 on the telescopic arm 2 through the supporting rod 6 and the moment generated by an article on the telescopic arm 2 is guaranteed.

Then, the crane control system controls the telescopic arm 2 to contract and horizontally pull the article lifted off the ground to the crane direction, so that the telescopic arm 2 can continuously lift the article, the moment generated by the article when the telescopic arm 2 lifts the article is reduced to the maximum extent, the telescopic arm 2 can lift the article more easily, the power of the crane for lifting the article is reduced, and the energy loss in the crane lifting process is reduced.

Along with the telescopic arm 2 contracts and pulls the object to the crane direction in-process, the telescopic arm 2 drives the support rod 6 and the support sleeve 21 to move synchronously through the fixed rod 4, the support sleeve 21 drives the four universal mechanisms to move synchronously through the base 41, and the roller 51 in the universal mechanism 42 rolls on the ground and effectively supports the telescopic arm 2.

When the four universal wheel mechanisms 42 installed on the base 41 meet ground pits, the four universal wheel mechanisms 42 are suspended instantaneously, under the action of the spring a17, the sliding block B24 drives the supporting sleeve 21 to extend vertically downward relative to the supporting rod 6 through the cooperation of the fixed block B26, the tensioned steel wire rope 27, the winding wheel 29, the shaft sleeve 30, the gear B31, the gear C32, the rotating shaft a33 and the worm wheel 35 and the worm 36 in the self-locking state, the spring a17 releases energy and extends instantaneously, the pressure sensed by the pressure sensor in the sliding block B24 is reduced and a generated electric signal is transmitted to the control system, the control system controls the electric drive module 40 to operate, the electric drive module 40 drives the sliding block B24 to compress and store energy for the spring a17 again through a series of transmission, so that the moment generated by the elastic force generated by the spring a17 on the telescopic arm 2 through the supporting rod 6 is equal to the moment generated by an object lifted off, guarantee flexible arm 2 and keep moment balance throughout in the shrink process, avoid flexible arm 2 to take place to deform because of the moment that the article that hangs off ground produced to the life of extension flexible arm 2.

When the four universal wheel mechanisms 42 rapidly cross a ground pit, the four universal wheel mechanisms 42 instantaneously generate vertical upward movement under the action of the ground, and the four universal wheel mechanisms 42 are matched with the worm wheel 35 and the worm 36 in a self-locking state through the base 41, the support sleeve 21, the worm wheel 35 and the worm 36, the rotating shaft A33, the gear C32, the gear B31, the shaft sleeve 30, the winding wheel 29, the tensioned steel wire rope 27 and the fixed block B26 to drive the sliding block B24 to further compress the spring A17. The pressure sensed by the pressure sensor in the sliding block B24 is increased and the generated electric signal is transmitted to the control system, the control system controls the electric drive module 40 to operate, the electric drive module 40 drives the sliding block B24 to vertically move downwards relative to the supporting sleeve 21 through a series of transmission, the spring A17 quickly releases part of energy, and the elastic force of the spring A17 is reduced, so that the moment generated by the elastic force generated by the spring A17 on the telescopic arm 2 through the supporting rod 6 is equal to the moment generated by an object lifted off the ground.

When the four universal wheel mechanisms 42 installed on the base 41 meet the ground bulge, the four universal wheel mechanisms 42 instantaneously generate vertical upward movement under the action of the bulge, and the four universal wheel mechanisms 42 drive the sliding block B24 to further compress the spring A17 through the base 41, the supporting sleeve 21, the worm wheel 35 and the worm 36 in a self-locking state, the rotating shaft A33, the gear C32, the gear B31, the shaft sleeve 30, the winding wheel 29, the tensioned steel wire rope 27 and the fixed block B26. The pressure that the pressure sensor in the slider B24 felt increases and transmits the signal of telecommunication that produces to control system, control system control electricity drives module 40 operation, electricity drives module 40 through a series of transmissions slider B24 and for supporting the vertical downstream of cover 21, spring A17 releases partial energy fast, the elasticity of spring A17 reduces, make the moment that the elasticity that spring A17 produced through bracing piece 6 to telescopic arm 2 production equal with the moment that is hung from the article on ground, guarantee telescopic arm 2 and keep moment balance throughout the contraction process, avoid telescopic arm 2 to take place the deformation because of the moment that the article that hangs from the ground produced, thereby the life of telescopic arm 2 is prolonged.

When all the four universal wheel mechanisms 42 arranged on the base 41 cross the ground to be convex, the four universal wheel mechanisms 42 are suspended instantaneously, under the action of a spring A17, a sliding block B24 drives a supporting sleeve 21 to vertically extend downwards relative to a supporting rod 6 through a fixed block B26, a tensioned steel wire rope 27, a winding wheel 29, a shaft sleeve 30, a gear B31, a gear C32, a rotating shaft A33 and a worm wheel 35 and a worm 36 in a self-locking state in a matching mode, the spring A17 releases energy and extends instantly, pressure sensed by a pressure sensor in the sliding block B24 is reduced, generated electric signals are transmitted to a control system, the control system controls an electric drive module 40 to operate, the electric drive module 40 drives the sliding block B24 to compress and store energy for the spring A17 again through a series of transmission, so that the moment of the spring force generated by the spring a17 on the telescopic arm 2 via the support bar 6 is equal to the moment of the item being lifted off the ground.

When the telescopic boom 2 drives the universal wheel mechanism 42 to horizontally move reversely, the sliding block C48 can horizontally slide in the corresponding square frame, so that the universal wheel mechanism 42 does not need to swing first and then drive the support sleeve 21 to horizontally move linearly, the reverse movement efficiency of the universal wheel mechanism 42 is ensured, and the jerking feeling caused by the fact that the universal wheel mechanism 42 needs to swing to perform reverse linear movement is avoided.

In conclusion, the beneficial effects of the invention are as follows: when the crane is used for hoisting objects with longer distance, the whole position of the crane body is not required to be adjusted, and the objects with longer distance can be sequentially drawn and hoisted only by the telescopic arm 2, the support rod 6 and the support sleeve 21 which are arranged on the tail end section of the telescopic arm 2 and are mutually matched in a sliding manner.

In addition, in the process of hoisting and pulling far-distance objects to the near part, the telescopic structure formed by the support rod 6 and the support sleeve 21 arranged on the section at the tail end of the telescopic arm 2 can automatically adjust the supporting force of the telescopic arm 2 according to the weight of a hoisted heavy object, so that the telescopic structure formed by the support rod 6 and the support sleeve 21 can always effectively support the telescopic arm 2, the telescopic arm 2 is prevented from being deformed due to the fact that the strength of the telescopic arm 2 in an extension state is weak when the far-distance objects are hoisted, and the service life of the telescopic arm 2 is prolonged.

Claims

1. The utility model provides a long distance lifting device which characterized in that: the device comprises a vehicle body, a support rod, a slide block A, a spring A, a hydraulic column, a support sleeve, a slide block B, a spring B and a universal wheel mechanism, wherein the support rod is in sliding fit with the support sleeve nested on the support rod; a pressure sensor for sensing the pressure change of the spring A is arranged in the sliding block B; four universal wheel mechanisms matched with the ground are symmetrically arranged at the tail end of the supporting sleeve; the support rod is hinged with a fixed rod vertically arranged on the section at the tail end of a telescopic arm of the crane, and a hydraulic column arranged on the section at the tail end of the telescopic arm drives the support rod to swing around the fixed rod;

2. The long-distance hoisting equipment as claimed in claim 1, wherein: the universal wheel mechanism comprises a fixed sleeve, a rotating shaft B, a long square frame, a sliding block C, a roller and a fixed shaft, wherein the fixed sleeve is arranged on a base at the tail end of a supporting sleeve, the rotating shaft B is rotatably matched in the fixed sleeve, and a circular ring arranged on the rotating shaft B rotates in a circular groove on the inner wall of the fixed sleeve; the tail end of the rotating shaft B is provided with a long square frame, and a sliding block C is in sliding fit in the long square frame along the horizontal direction; two guide blocks B are symmetrically arranged on the sliding block C and respectively slide in two guide grooves B on the inner wall of the rectangular frame; two fixed shafts are symmetrically arranged on two sides of the sliding block C, and each fixed shaft is provided with a roller matched with the ground.

3. The long-distance hoisting equipment as claimed in claim 1, wherein: the sliding block B is provided with a fixed block B, and the fixed block B moves in a movable groove on the side wall of the support sleeve; a steel wire rope is wound on a winding wheel arranged on the outer side of the supporting sleeve, and one end of the steel wire rope is connected with a fixed block B by winding a fixed pulley arranged on the outer side of the supporting sleeve; the winding wheel which is rotationally matched with the shaft is fixedly connected with a coaxial gear B through a shaft sleeve; a rotating shaft A is rotatably matched on a support A arranged on the outer side of the supporting sleeve, and a gear C arranged on the rotating shaft A is meshed with a gear B; two supports B arranged on the outer side of the supporting sleeve are rotatably matched with worms, and the worms are meshed with worm wheels arranged on the rotating shaft A; and the output shaft of the electric drive module arranged on the support sleeve is provided with a gear E, and the gear E is meshed with a gear D arranged at one end of the worm.

4. The long-distance hoisting equipment as claimed in claim 1, wherein: a rack A slides in the support rod along the relative telescopic direction of the support rod and the support sleeve, the rack A is fixedly connected with the sliding block A, and the rack A and a rack B which slides in the support rod in parallel with the rack A are simultaneously meshed with a gear A arranged in the support rod; one end of the rack B is matched with two limiting grooves which are arranged on the arc surface at the tail end of the fixed rod and are 90 degrees away from the radian, so that the supporting rod is locked relative to the unfolding state and the recovery state of the fixed rod.

5. The long-distance hoisting equipment as claimed in claim 4, wherein: the gear A rotates in the accommodating groove in the supporting rod, the rack A slides in the sliding groove A in the supporting rod, and the rack B slides in the sliding groove B in the supporting rod.

6. The long-distance hoisting equipment as claimed in claim 1, wherein: the supporting rod is symmetrically provided with two guide blocks A which slide in two guide grooves A on the inner wall of the supporting sleeve respectively; the fixed rod is provided with a limit swing rod matched with the support rod; the slide block A is provided with a trapezoidal guide block which slides in a trapezoidal guide groove on the support rod; the spring A is an extension spring; one end of the spring A is connected with a fixed block A arranged on the supporting rod, and the other end of the spring A is connected with the sliding block A; the spring a is always in tension.