CN110626964A - Novel foldable crane with adjustable height - Google Patents

Abstract

The invention discloses a novel foldable crane with adjustable height, which comprises a base, an upright post hinged with the base, a height adjusting driving device capable of changing the height of the upright post, a cargo boom hinged with the upper end of the upright post and an amplitude-variable oil cylinder arranged between the upright post and the cargo boom, wherein the lower end of the upright post is hinged with the base by a transverse shaft around the transverse axis of the base; the amplitude-variable oil cylinder can drive the crane boom and the vertical column in the horizontal position to be folded and enable the crane boom to be parallel to the vertical column in the horizontal position, so that the crane is in a folded state. The folding crane is suitable for equipping various engineering vehicles.

Description

Novel foldable crane with adjustable height

Technical Field

The invention relates to the field of engineering machinery, in particular to a novel crane which can be adjusted in height and folded.

Background

The lorry-mounted crane is provided with a crane on a cargo transport vehicle and other special vehicles, and a hoisting function is added on the basis of the functions of the vehicles. The lorry-mounted crane in the prior art is high in overall height and large in occupied space, is easily limited by passing height during running, is limited by using height on an operation site, and is not used, the crane boom is arranged on the upper portion of a carriage in a suspended state to occupy the cargo space of a vehicle, and is not easy to support and fix, so that the crane boom can vibrate and swing to influence the service life of the crane during running of the vehicle.

Disclosure of Invention

Aiming at the problems, the invention provides a novel foldable crane which has compact and concise structure, convenient operation and adjustable height, and can be assembled on various engineering vehicles, and the crane can be contracted and folded when not used and does not occupy the cargo carrying space of the vehicles.

The technical scheme of the invention is as follows: a novel foldable crane with adjustable height comprises a base, an upright post hinged with the base, a height adjusting driving device capable of changing the height of the upright post, a crane boom hinged with the upper end of the upright post and an amplitude variation oil cylinder arranged between the upright post and the crane boom;

the lower end of the upright post is hinged with the base through a transverse shaft around a transverse axis on the base, a height adjusting driving device is arranged on the base and connected with the upright post, and the height adjusting driving device supports the upright post and can drive the upright post to rotate around the transverse axis between a vertical working position and a horizontal working position/horizontal folding position in the direction opposite to the direction pointed by the boom head, so that the height of the crane is changed by changing the height of the upright post;

the base comprises a substantially planar bottom plate, and a left vertical plate and a right vertical plate which are vertically arranged on the bottom plate, the length of the left vertical plate and the length of the right vertical plate of the base longitudinally respectively extend between the front end and the rear end of the bottom plate, the height of the left vertical plate and the height of the right vertical plate vertically extend upwards on the bottom plate respectively, the lower parts of the left vertical plate and the right vertical plate of the base are provided with transverse corresponding shaft holes for matching and installing the transverse shaft, the bottom plate is provided with an oil cylinder hinged seat, the front part of the base is provided with a reinforcing plate for connecting the front end parts of the left vertical plate and the right vertical plate with the bottom plate, the reinforcing plate, the left vertical plate, the right vertical plate and the bottom plate are fixed relative to each other to form a base structure with the upper side and the rear side of the base;

the stand includes left web and right web that symmetry and be parallel to each other to and the front panel of connecting left web and right web and the rear panel who connects left web and right web form the cross-section roughly rectangle and both ends by confined chamber structure configuration, the lower extreme of stand be equipped with horizontal axle sleeve be used for with the base is articulated, the upper portion of stand is equipped with the connecting axle and is used for being connected with height adjustment drive arrangement, the outside of the left web of stand and right web is provided with the cylindricality boss of protrusion in the web surface and symmetry each other respectively along same transverse axis, and left web and right web still are equipped with horizontal corresponding second hole.

The novel crane has a vertical axis Y, and when a crane boom is in a horizontal state, the direction (D) pointed by a crane boom head is the forward direction of the crane;

the height adjusting driving device comprises a height adjusting oil cylinder.

The rear end of the cargo boom is hinged with the upper end of the upright post, the height adjusting and driving device changes the height of the upright post and the height of the crane, and the height adjusting and driving device changes the height of the upright post and simultaneously changes the amplitude of the crane.

When the use height of the crane is limited, on one hand, the upright post of the crane can be rotated to a horizontal working position towards the rear of the upright post, namely the opposite direction of the direction pointed by the boom head, by using the height adjusting driving device, so that the effective height of the crane is reduced, on the other hand, the working angle of the boom can be adjusted by using the height adjusting driving device and the luffing cylinder so as to adapt to the limitation of the use height of the crane on a working site, and when the crane is not used, the crane can be folded and contracted to a compact folded state, so that the occupied space of the crane is extremely small, the space occupied by the crane does not carry cargo, and the problems of the lorry-mounted crane in the prior art are solved.

When the crane needs to have a certain use height, the height adjusting and driving device can be used for rotating the vertical column in a horizontal state to a substantially vertical working position in the front of the vertical column, namely the direction pointed by the boom head, so that the height of the crane is increased.

The shaft hole on the base is provided with a transverse axis, and the oil cylinder hinge seat on the base is positioned at the rear side of the transverse axis and has a proper distance with the transverse axis.

The left vertical plate and the right vertical plate of the base are provided with a plurality of first holes which are opposite in the transverse direction, the first holes correspond to the vertical columns in the horizontal position and correspond to the vertical columns in the approximately vertical working position, and the distance between each first hole in the base and the transverse axis is equal.

The front panel of the upright post is provided with a substantially rectangular square hole, the rear panel is provided with a winch mounting hole to form a semi-closed cavity structure of the upright post, the middle part in the semi-closed cavity of the upright post is provided with a luffing cylinder hinge seat, and the position of the left web plate and/or the right web plate corresponding to the luffing cylinder hinge seat is provided with a pin shaft mounting hole of the luffing cylinder hinge seat.

The distance between the left vertical plate and the right vertical plate of the base at least limits the transverse width of the part, located in the structural configuration, of the stand column, so that the gap between the left web plate and the right web plate, located in the structural configuration, of the stand column, and the gap between the left vertical plate and the right vertical plate of the base are minimum, and the stand column cannot rub with the left vertical plate and the right vertical plate of the base when rotating.

The height adjusting driving device comprises a height adjusting oil cylinder, the end part of the cylinder body of the height adjusting oil cylinder is hinged with an oil cylinder hinged seat on the base, the end part of a piston rod is hinged with a connecting shaft on the stand column, the height adjusting oil cylinder is used for supporting the stand column and has a supporting angle alpha between the stand columns, and when the stand column is located at a horizontal position, the piston rod of the height adjusting oil cylinder retracts into the cylinder body.

The end part of the cylinder body of the variable amplitude oil cylinder is hinged with a variable amplitude oil cylinder hinged seat in the semi-closed cavity of the upright post through a square hole of the front panel of the upright post, the other end of the cylinder body is hinged with the crane boom, and at least part of the variable amplitude oil cylinder is accommodated in the semi-closed cavity of the upright post; when the height of the upright post is raised, the cargo boom and the luffing oil cylinder are effectively positioned at the raised position, and when the height of the upright post is lowered, the cargo boom and the luffing oil cylinder are effectively positioned at the lowered position, and the luffing oil cylinder can enable the cargo boom and the upright post positioned at the horizontal position to be folded and enable the cargo boom to be parallel to the upright post positioned at the horizontal position, so that the crane is in a folded compact state.

The distance between the first hole on the base and the transverse axis of the base is equal to the distance between the second hole on the upright post and the axis of the shaft sleeve of the upright post, the shaft sleeve of the upright post is hinged with the base around the transverse axis of the base, and the axis of the shaft sleeve of the upright post is superposed with the transverse axis of the base.

The crane comprises a supporting device for supporting a boom of the folded crane, and the supporting device is connected with the base.

The crane comprises a limiting device, the limiting device is used for limiting the rotating interval of the upright column between a horizontal position and an approximately vertical working position relative to the base, the limiting device is connected with a left web plate and a right web plate of the base respectively, and the connecting positions of the limiting device and the left web plate and the right web plate of the base can be adjusted and changed.

The crane comprises at least one locking mechanism to selectively fix the upright in a position with a rotation section corresponding to any one of the first holes on the base, relative to the base, the locking mechanism being movable between a locked configuration suitable for fixing the upright to the base and an unlocked configuration suitable for releasing the fixed upright, the crane further comprising a control module capable of controlling the locking mechanism.

The locking mechanism is arranged in a semi-closed cavity of the stand column, the stand column limits at least one part of the outer surface of the locking mechanism, the locking mechanism is provided with at least one cylindrical lock shaft capable of moving transversely, the cylindrical lock shaft is arranged in a second hole of the stand column in a matching mode, when the stand column rotates around the transverse axis of the base, the cylindrical lock shaft can correspond to first holes in the base one by one, and the locking mechanism inserts the cylindrical lock shaft into the first holes corresponding to the cylindrical lock shaft to fix the stand column.

The crane comprises a winch for lifting a load, the winch is connected with the upright column through a winch mounting hole in the rear panel of the upright column, and at least one part of the winch is arranged and mounted in the semi-closed cavity of the upright column.

The crane comprises a rotary support mechanism, the base is connected with the rotary support mechanism, and the rotary support mechanism is connected with the bracket, so that the crane can rotate around a vertical axis Y.

The invention also provides a hoisting transport vehicle provided with the crane, the hoisting transport vehicle comprises a chassis and the crane, the crane is arranged on the chassis of the hoisting transport vehicle through a bracket, the bracket can be provided with a hydraulic support leg, and the crane is the crane provided by the invention.

The height of the crane can be changed by lowering or raising the height of the upright column in the hoisting process, the height of the crane is the lowest when the upright column of the crane is at the horizontal working position, the crane can adapt to the limitation of the hoisting operation site on the height of the crane, a new amplitude variation way is added for the crane by changing the height of the upright column, and the crane can be placed in a contracted and folded state when not used, so that the space is fully saved.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a top view of FIG. 1;

FIG. 3 is a perspective view of the present invention;

FIG. 4 is a perspective view of a base of the present invention;

FIG. 5 is a top view of the base of the present invention;

FIG. 6 is a schematic structural view of a pillar in the present invention;

FIG. 7 is a top view of FIG. 6;

FIG. 8 is a sectional view taken along line A-A of FIG. 7;

FIG. 9 is a perspective view of a post according to the present invention;

FIG. 10 is a schematic view of the construction of the column with the parts attached thereto;

FIG. 11 is a reference view of the working condition of the column in the horizontal working position;

FIG. 12 is a reference view of the upright in an operative condition in a generally upright operative position;

FIG. 13 is a schematic variable amplitude view of the present invention utilizing a height adjustment drive;

FIG. 14 is a first schematic view of the present invention mounted on a truck;

FIG. 15 is a second schematic view of the present invention mounted on a truck;

FIG. 16 is a top view of FIG. 15;

FIG. 17 is a first reference view of the crane according to the present invention in an operating state;

FIG. 18 is a second view showing the working state of the crane according to the present invention;

fig. 19 is a reference diagram III of the working state of the crane of the invention.

List of reference numerals:

100. a hoisting transport vehicle 1, a crane;

10. the hydraulic oil cylinder hinge device comprises a base, 11, a bottom plate, 12a, a left vertical plate, 12b, a right vertical plate, 13, an oil cylinder hinge seat, 14, an axle hole, 15, a transverse shaft, 16, a transverse axis, 17, a first hole, 18, a limiting device, 19 and a reinforcing plate;

20. the variable-amplitude oil cylinder comprises a column 21a, a left web plate 21b, a right web plate 22, a front panel 23, a rear panel 24, a shaft sleeve 25, square holes 26, shaft sleeve axes 27, second holes 28, variable-amplitude oil cylinder hinged seats 29 and reinforcing rib plates;

30. the crane comprises a crane arm, 31, a basic arm, 32, a telescopic arm, 33, a crane arm head, 34, a winch, 35, a cable guide, 36, a reinforcing rib, 37, a through hole, 38, a column-shaped boss, 39 and a supporting device;

40. the device comprises a height adjusting driving device 41, a connecting shaft 42, a locking mechanism 43, a cylindrical locking shaft 44, a rotary supporting mechanism 45, a bracket 46, a chassis 47, hydraulic supporting legs 48, winch mounting holes 49 and pin shaft mounting holes;

50. a luffing cylinder 51 and a reinforcing plate.

Detailed Description

The new crane 1 of the invention is described with reference to figures 1-3.

Fig. 1 shows a novel height-adjustable and foldable crane 1 according to the present invention, which comprises a base 10, a vertical column 20 hinged to the base, a height adjusting driving device 40 supporting the vertical column 20 and capable of changing the height of the vertical column 20, a boom 30 hinged to the upper end of the vertical column, and a luffing cylinder 50 disposed between the vertical column 20 and the boom 30.

Fig. 1-3 show only the basic components and the basic structure of the new crane 1 according to the invention, including also the hydraulic system (not shown), the power supply system (not shown), the handling system (not shown) and also other components used or attached or otherwise provided to the crane known to the person skilled in the art.

It is worth mentioning that in the embodiment in which the crane 1 is equipped with a vehicle 100, it is possible to resort to the hydraulic system, the electrical supply system of the vehicle 100, and therefore to avoid complex mechanical structures.

In this embodiment, the height adjustment driving device 40 includes a height adjustment cylinder;

also designated is the forward direction (D) of the crane 1, where the forward direction is referred to with respect to the crane 1 of the present invention, and the boom 30 of the crane 1 is in a horizontal position, the boom head 33 is referred to as the forward direction of the crane 1, the opposite direction is the backward direction, the forward and backward directions are longitudinal directions, and the transverse direction is perpendicular to the longitudinal and vertical directions.

Referring to fig. 4 and 5, the base 10 includes a substantially planar bottom plate 11 and a left vertical plate 12a and a right vertical plate 12b erected on the bottom plate, a horizontal corresponding shaft hole 14 is provided at a lower portion of the left vertical plate 12a and the right vertical plate 12b of the base 10 near the bottom plate 11 for cooperatively installing a horizontal shaft 15, the shaft hole 14 has a horizontal axis 16, a through hole 37 is further provided at a central position of the bottom plate 11 to allow a hydraulic pipeline and a circuit or other components to pass through the through hole 37, a cylinder hinge base 13 is further provided on the bottom plate 11 of the base 10, and the cylinder hinge base 13 is located at a rear side of the horizontal axis 16 and has a suitable distance from the horizontal axis 16.

The lengths of the left vertical plate 12a and the right vertical plate 12b of the base 10 respectively extend between the front end and the rear end of the bottom plate 11 along the longitudinal direction, the heights respectively extend vertically upwards on the bottom plate 11 to a height not exceeding the height of the crane 1 in a folded state, the front part of the base 10 is provided with a reinforcing plate 19 connecting the front end parts of the left vertical plate 12a and the right vertical plate 12b and the bottom plate 11, and the reinforcing plate 19, the left vertical plate 12a and the right vertical plate 12b and the bottom plate 11 are fixed relative to each other to form the structural configuration of the base 10 with the upper side and the rear side of the base 10 opened.

The base 10 has a structural configuration in which an installation space is provided for receiving a lower portion of the pillar 20, the lower end of the pillar 20 is hinged to the base 10 in the structural configuration of the base 10, and the lower portion of the pillar 20 is received in the structural configuration of the base 10.

The left and right uprights 12a, 12b of the base 10 are provided with a plurality of first holes 17 corresponding transversely, including a first hole 17 corresponding to the upright 20 in the horizontal work position/horizontal folded position (see figure 11) and a first hole 17 corresponding to the upright 20 in the substantially vertical work position (see figure 12), each first hole 17 being equidistant from the transverse axis 16 of the base 10.

Referring to fig. 6-9, the upright column 20 comprises a left web 21a and a right web 21b which are symmetrical and parallel to each other, a front panel 22 connecting the two webs, and a rear panel 23 connecting the two webs to form a chamber structure with a substantially rectangular cross section and two closed ends, the lower end of the upright column 20 is provided with a transverse shaft sleeve 24 having a shaft sleeve axis 26, the shaft sleeve 24 of the upright column 20 is hinged with the base 10 by a transverse shaft 15 around the transverse axis 16 of the base 10, two sides of the upper part of the upright column 20 are respectively provided with mutually symmetrical connecting shafts 41 for connecting with a height adjusting driving device 40, and the outer sides of the left web 21a and the right web 21b of the upright column 20 are respectively provided with mutually symmetrical cylindrical bosses 38 which protrude from the outer surfaces of the webs along the same transverse axis.

The front panel 22 of the upright column 20 is provided with a substantially rectangular square hole 25, the rear panel is provided with a winch mounting hole 48 (see figure 8) to form a semi-closed cavity structure of the upright column 20, the middle part in the semi-closed cavity is provided with a luffing cylinder hinged seat 28, the positions of the left web plate 21a and/or the right web plate 21b corresponding to the luffing cylinder hinged seat 28 are provided with pin shaft mounting holes 49 of the luffing cylinder hinged seat 28, two web plates of the upright column 20 are provided with transverse corresponding second holes 27, a plurality of reinforcing rib plates 29 (see figure 8) are further arranged in the semi-closed cavity of the upright column 20 to increase the strength of the upright column 20, and the outer sides of the left web plate 21a and the right web plate 21b corresponding to the winch mounting hole 48 are respectively provided with reinforcing plates.

The distance between the left vertical plate 12a and the right vertical plate 12b of the base 10 defines the transverse width of the inner part of the upright 20 located in the structural configuration of the base 10, so that the gaps between the two lateral webs of the inner part of the upright 20 located in the structural configuration of the base 10 and the two vertical plates of the base 10 are minimized, and no friction is generated between the upright 20 and the two vertical plates of the base 10 when the upright 20 rotates.

Referring to fig. 1-5, the lower part of the upright column 20 is accommodated in the structural configuration of the base 10, the lower end of the upright column is hinged with the base 10 by a transverse shaft 15 around a transverse axis 16 in the structural configuration of the base, the cylinder end part of the height adjusting cylinder is hinged with a cylinder hinge seat 13 on the base 10, the end part of the piston rod is hinged with a connecting shaft 41 of the upright column 20, the height adjusting cylinder extends and retracts along the length direction to drive the upright column 20 to rotate between a vertical working position and a horizontal working position/horizontal folding position, when the upright column 20 of the crane 1 is required to move to the vertical working position in the horizontal working position to raise the height of the crane 1, the piston rod of the height adjusting cylinder extends, the driving upright column 20 rotates around the transverse axis 16 towards the direction indicated by the arm head 33, so that the upright column 20 is rotated from the horizontal position to the vertical, when the height of the crane 1 is raised, and the height of the crane 1 is lowered by moving the upright post 20 of the crane 1 from the vertical working position to the horizontal working position/the horizontal folding position, the piston rod of the height adjusting cylinder retracts into the cylinder body, the upright post 20 is driven to rotate around the transverse axis 16 in the direction opposite to the direction indicated by the boom arm head 33, the upright post 20 is rotated to the horizontal position, the height of the upright post 20 is changed, and the height of the crane 1 is lowered, and when the upright post 20 is in the horizontal position, the piston rod of the height adjusting cylinder retracts into the cylinder body (see fig. 1).

The height adjustment drive 40 is able to drive the mast 20 during operation of the crane 1 in rotation about the transverse axis 16 between a vertical operating position and a horizontal operating position in the opposite direction to that indicated by the boom head 33, whereby the height of the mast 20 is changed, i.e. the effective height of the crane 1 is optionally adjusted by the height adjustment drive 40, the height adjustment drive 40 changing the height of the mast 20 and simultaneously the height of the crane 1, the height adjustment drive 40 being able to luff the crane 1 while changing the height of the mast 20 and thus of the crane 1 (see fig. 13).

In this embodiment, the boom 30 includes a base arm 31, at least one stage of telescopic arms 32 (see fig. 12), and a telescopic driving cylinder (not shown), the telescopic arms 32 are telescopically sleeved in the base arm 31, the telescopic driving cylinder is arranged between the base arm 31 and the telescopic arms 32 for driving the telescopic arms to extend and retract, and the boom 30 of the structure can be load-telescoped at any angle.

The lifting arm 30 is hinged with the upper end of the upright post 20, the cylinder body end part of the luffing cylinder 50 is hinged with a luffing cylinder hinge seat 28 in a semi-closed chamber of the upright post through a square hole 25 opened on a front panel 22 of the upright post 20, the piston rod end part is hinged with a basic arm 31 of the lifting arm, when the height of the upright post 20 is lowered, the lifting arm 30 and the luffing cylinder 50 are effectively in a lowered position (see figure 11), and when the height of the upright post 20 is raised, the lifting arm 30 and the luffing cylinder 50 are effectively in a raised position (see figure 12).

The characteristic that a part of the luffing cylinder 50 is accommodated in the semi-closed cavity of the upright post 20 effectively increases the installation distance and the stroke of the luffing cylinder 50, so that the luffing cylinder 50 has a sufficient supporting angle for the jib 30, the luffing cylinder 50 is favorable for driving the jib 30 to be folded with the upright post 20 in the horizontal position, the jib 30 can be parallel to the upright post 20 in the horizontal position, and the crane 1 is favorable for being in a folded compact state (see fig. 1).

Advantageously, when the crane 1 is in the folded state, the upright 20 is parallel to the bottom plate 11 of the base 10, and the jib 30 is parallel to the upright 20 (see fig. 1).

In this context, "the cylinder hinge base 13 on the base 10 is at a proper distance from the transverse axis 16", which means that the height adjusting cylinder has a proper support angle α (see fig. 1) to the upright 20, and the proper support angle α facilitates the support and driving of the height adjusting cylinder to the upright 20, and improves the lifting capability of the crane 1.

In the present invention, the open top and back sides of the base 10 facilitate the upright 20 to rotate in the vertical working position about the transverse axis 16 to the back, i.e., opposite to the direction indicated by the boom head 33, to the horizontal working position/horizontal folded position, and vice versa, facilitate the upright 20 to rotate in the horizontal working position/horizontal folded position about the transverse axis 16 to the vertical working position indicated by the boom head 33, and the base 10 is configured to facilitate the upright 20 to fold at a zero distance from the base plate 11 of the base, and to reduce the height of the crane 1 after folding (see fig. 3).

According to the present invention, the shape of the bottom plate 11 of the base 10 may be determined as a circle or a square, which is selected by those skilled in the art as needed to facilitate the fixing of the base 10 with the related members for the purpose.

In the present embodiment, the bottom plate 11 of the base 10 is shaped in a circular shape (see fig. 4).

To further increase the strength of the base 10 and provide sufficient load carrying capacity, the base 10 should further include a plurality of reinforcing ribs, such as reinforcing ribs 36 (see fig. 4) for reinforcing the left and right vertical plates 12a and 12b, respectively.

In the present invention, the first hole 17 in the base 10 is equidistant from the transverse axis 16 and the second hole 27 in the post 20 is equidistant from the sleeve axis 26.

When the sleeve 24 of the upright 20 is hinged to the base 10 about the transverse axis 16 of the base 10, the sleeve axis 26 of the upright 20 coincides with the transverse axis 16 of the base 10, so that the second holes 27 of the upright 20 can correspond one by one to the first holes 17 of the base 10 when the upright 20 is rotated about the transverse axis 16 of the base 10.

In the present invention, the crane 1 comprises at least one locking mechanism 42 (see fig. 10) to selectively fix the upright 20 with respect to the base 10 in a position corresponding to any one of the first holes 17 of the base 10 during its rotation about the transverse axis 16.

Referring to fig. 11-12, the locking mechanism 42 can secure the upright 20 in the first hole 17 (see fig. 11) corresponding to the horizontal working position/horizontal folded position, and in the first hole 17 (see fig. 12) corresponding to the substantially vertical working position.

The locking mechanism 42 has at least one laterally movable cylindrical locking shaft 43 (see fig. 3), the second holes 27 of the upright post 20 can correspond one by one to the first holes 17 of the base 10 when the upright post 20 rotates around the transverse axis 16 of the base, and the locking mechanism 42 inserts the cylindrical locking shaft 43 into the corresponding second holes 27 and first holes 17 to fix the upright post 20.

The drive mode for the cylinder lock shaft 43 includes a hydraulic cylinder drive mode.

The locking mechanism 42 is movable between a locked configuration suitable for fixing the upright 20 with the base 10 and an unlocked configuration suitable for releasing the fixed upright 20, the crane 1 further comprising a control module (not shown) capable of controlling the locking mechanism 42.

In this embodiment, the locking mechanism 42 is connected with the upright post 20, the locking mechanism 42 is arranged in the semi-closed cavity of the upright post 20 (see fig. 10), the upright post 20 defines at least one part of the outer surface of the locking mechanism 42, the cylindrical lock shaft 43 of the locking mechanism is arranged in the second hole 27 of the upright post in a matching way, the cylindrical lock shaft 43 can be corresponding to the first hole 17 on the base 10 one by one when the upright post 20 rotates around the transverse axis 16, and the locking mechanism 42 inserts the cylindrical lock shaft 43 into the corresponding first hole 17 to fix the upright post 20 (see fig. 3); thus, the invention only needs to provide one locking mechanism 42 to fix the upright post 20 at a plurality of positions corresponding to the first hole 17 in the rotation range of the upright post around the transverse axis 16 of the base 10, and is beneficial to reducing the manufacturing cost.

In another embodiment, a locking mechanism 42 is connected to the base 10, the locking mechanism 42 has a number of laterally movable cylindrical lock shafts 43 equal to the number of first holes 17 on the base 10, the lock shafts are fittingly disposed in the first holes 17 of the base 10, the second holes 27 of the upright 20 can correspond to the cylindrical lock shafts 43 in the first holes 17 of the base 10 when the upright 20 rotates around the lateral axis 16, and the locking mechanism 42 inserts the cylindrical lock shafts 43 into the corresponding second holes 27 to fix the upright 20.

In the present invention, when the crane 1 lufves using the height adjustment driving device 40, the locking mechanism 42 does not participate in the operation.

Referring to fig. 1, the crane 1 further comprises a winch 34 for lifting a load, the winch 34 being connected to the column 20 through a winch mounting hole 48 of the rear panel 23, at least a portion of the winch 34 being arranged to be mounted in the semi-enclosed chamber of the column 20.

The arrangement of the crane 1 providing the benefit of reduced folded height is provided by the underside of the rear portion of the base arm 31 of the lift arm 30 being provided with a cable guide 35 (see fig. 12) and a portion of the cable guide 35 being accessible from the square hole 25 in the front panel 22 of the upright 20 into the semi-enclosed cavity of the upright when the lift arm 30 is folded with the upright 20.

The crane 1 of the present invention comprises a supporting device 39 for supporting the boom 30 of the crane 1 in a folded state, the supporting device 39 supports and fixes the boom 30, and the supporting device 39 is connected with the base 10 (see fig. 4).

In another embodiment, the upper end of the reinforcement plate 19 is configured to receive and support the boom 30 of the crane 1 in a folded state, and in this embodiment the boom 30 is supported by the support configuration of the upper end of the reinforcement plate 19 when the crane 1 is in the folded state.

In the invention, the crane 1 comprises a limiting device 18, so as to limit the rotation range of the upright post 20 between a horizontal working position/a horizontal folding position and a substantially vertical working position relative to the base 10, the limiting device 18 is respectively connected with the left upright plate 12a and the right upright plate 12b of the base 10 (see figure 4), and the connecting positions of the limiting device 18 and the left upright plate and the right upright plate of the base 10 can be adjusted or changed according to requirements.

In the embodiment of the invention, the outer sides of the left web 21a and the right web 21b of the upright 20 are respectively and transversely provided with a column-shaped boss 38 (see fig. 7) protruding out of the outer surface of the web, the column-shaped boss 38 is arranged in a matching way with the limiting device 18, the distance between the limiting device 18 and the transverse axis 16 of the base 10 is equal to the distance between the column-shaped boss 38 and the shaft sleeve axis 26 of the upright 20, and during the process of turning the upright 20 to the vertical working position, the column-shaped boss 38 is contacted with the limiting device 18, so that the upright 20 is blocked and limited to the set approximately vertical working position (see fig. 12).

The upright 20 can be stopped and limited in the vertical working position by the stop device 18 on the base 10 during the turning to the vertical working position, and at the same time, the upright 20 in the vertical working position is fixed by the cylindrical locking shaft 43 of the locking mechanism 42, so that the upright 20 can be kept in the vertical working position even if the hydraulic system (not shown) has an unexpected fault during the operation of the crane 1.

The crane 1 according to the invention has a vertical axis Y, the mast 20 has a longitudinal axis C, the longitudinal axis C of the mast 20 is inclined backwards with respect to the vertical axis Y of the crane 1 when the mast 20 is in a substantially vertical operating position, the inclined backwards tilting of the mast 20 being an advantageous operating position of the crane 1 according to the invention (see fig. 12).

Referring to fig. 12, the crane 1 comprises a slewing support 44, the base 10 being connected to the slewing support 44, the slewing support 44 being connected to a carriage 45 such that said crane 1 can rotate about a vertical axis Y.

The crane 1 of the present invention can be used for equipping various engineering vehicles, transportation vehicles, engineering rescue vehicles, etc., for example, a crane transportation vehicle 100 shown in fig. 14 and 15, the vehicle 100 comprises a chassis 46 and the crane 1, the crane 1 is mounted on a bracket 45, the bracket is mounted on the chassis 46, the bracket 45 can be provided with a hydraulic support leg 47, wherein, the crane 1 is the crane provided by the present invention.

The above description is only exemplary embodiments of the present invention, and the above examples and embodiments are not intended to limit the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit of the present invention should be included in the protection scope of the present invention.

Claims (15)

1. Novel height-adjustable and foldable crane (1) comprising a base (10), a vertical column (20) hinged with the base, a height adjusting driving device (40) capable of changing the height of the vertical column, a lifting arm (30) hinged with the upper end of the vertical column (20), and a luffing cylinder (50) arranged between the vertical column (20) and the lifting arm (30), wherein the lower end of the vertical column (20) is hinged with the base (10) by a transverse shaft (15) around a transverse axis (16) on the base, the height adjusting driving device (40) is arranged and installed on the base (10) and connected with the vertical column (20), the height adjusting driving device (40) forms a support for the vertical column (20) and can drive the vertical column (20) to rotate around the transverse axis (16) at a vertical working position and a horizontal working position (opposite to the direction indicated by the arm head (33) in a vertical working position and a horizontal working position (work position- -rotation between horizontal folded positions, whereby the height of the crane (1) is changed by changing the height of the upright (20);

the base (10) comprises a substantially planar bottom plate (11), and a left vertical plate (12a) and a right vertical plate (12b) which are vertically arranged on the bottom plate, the length of the left vertical plate (12a) and the length of the right vertical plate (12b) of the base (10) respectively extend between the front end and the rear end of the bottom plate (11) along the longitudinal direction, the height of the left vertical plate (12a) and the length of the right vertical plate (12b) respectively extend upwards on the bottom plate (11), the lower parts of the left vertical plate (12a) and the right vertical plate (12b) of the base are provided with transverse corresponding shaft holes (14) for matching with and installing a transverse shaft (15), the bottom plate (11) is further provided with an oil cylinder hinged seat (13), the front part of the base (10) is provided with a reinforcing plate (19) for connecting the front end parts of the left vertical plate (12a) and the right vertical plate (12b) and the bottom plate (11), the reinforcing plate (19, forming a base structure configuration with the upper side and the rear side of the base (10) open, wherein the base (10) has an installation space for accommodating the lower part of the upright post (20) in the structure configuration, and the lower end of the upright post (20) is hinged with the base (10) in the structure configuration of the base (10);

the vertical column (20) comprises a left web (21a) and a right web (21b) which are symmetrical and parallel to each other, a cavity structure with two closed ends is approximately rectangular in cross section and formed by a front panel (22) for connecting the left web and the right web and a rear panel (23) for connecting the left web and the right web, a transverse shaft sleeve (24) is arranged at the lower end of the vertical column (20) and used for being hinged to the base (10), a connecting shaft (41) is arranged at the upper part of the vertical column (20) and used for being connected with a height adjusting driving device (40), cylindrical bosses (38) protruding out of the outer surface of the webs are respectively arranged on the outer sides of the left web (21a) and the right web (21b) of the vertical column (20) along the same transverse axis, and second holes (27) corresponding to the left web and the right web of the vertical column (20) in the transverse direction are.

2. A new crane (1) according to claim 1, characterized in that the axle hole (14) of the base (10) has a transverse axis (16), the cylinder hinge seat (13) on the base (10) being located at the rear side of the transverse axis (16) and at a suitable distance from the transverse axis (16).

3. A new crane (1) according to claim 1, characterized in that said left (12a) and right (12b) uprights of said base (10) are provided with a plurality of first holes (17) corresponding transversely, including a first hole (17) corresponding to the upright (20) in a horizontal position and a first hole (17) corresponding to the upright (20) in a substantially vertical working position, each first hole (17) of said base (10) being equidistant from said transverse axis (16).

4. The novel crane (1) as claimed in claim 1, wherein the front panel (22) of the upright column (20) is provided with a substantially rectangular square hole (25), the rear panel (23) is provided with a winch mounting hole (48) to form a semi-closed cavity structure of the upright column (20), the middle part in the semi-closed cavity of the upright column (20) is provided with a luffing cylinder hinge seat (28), and the left web (21a) and/or the right web (21b) is provided with a pin shaft mounting hole (49) of the luffing cylinder hinge seat (28) at a position corresponding to the luffing cylinder hinge seat (28).

5. The novel crane (1) as claimed in claims 1 to 4, wherein the distance between the left and right vertical plates (12a, 12b) of the base (10) at least defines the lateral width of the part of the upright (20) located in the structural configuration of the base (10), so that the clearance between the left and right webs (21a, 21b) of the upright (20) located in the structural configuration of the base (10) and the left and right vertical plates (12a, 12b) of the base (10) is minimized, and the upright (20) does not rub against the left and right vertical plates (12a, 12b) of the base (10) when rotated.

6. The novel crane (1) as claimed in claims 1 to 5, wherein the height adjustment drive device (40) comprises a height adjustment cylinder, the end of the height adjustment cylinder is hinged to a cylinder hinge seat (13) on the base (10), the end of the piston rod is hinged to a connecting shaft (41) on the upright (20), the height adjustment cylinder supports the upright (20) and has a supporting angle α with the upright (20), and when the upright (20) is in a horizontal position, the piston rod of the height adjustment cylinder retracts into the cylinder.

7. The novel crane (1) as claimed in claims 1 to 6, characterized in that the cylinder end of the luffing cylinder (50) is articulated via a square hole (25) of the front panel (22) of the mast (20) to a luffing cylinder articulation seat (28) in the semi-closed chamber of the mast (20) and at the other end to the jib (30), the luffing cylinder (50) being at least partially accommodated in the semi-closed chamber of the mast (20).

8. A new crane (1) according to claims 1 to 3, characterized in that the first hole (17) on the base (10) is at the same distance from the transverse axis (16) of the base as the second hole (27) on the upright (20) is at the same distance from the bushing axis (26) of the bushing (24) of the upright (20), the upright (20) being hinged to the base (10), the bushing axis (26) of the upright coinciding with the transverse axis (16) of the base.

9. A new crane (1) according to claim 1, characterized in that the crane (1) comprises a support device (39), which support device (39) is used to support the boom (30) of the crane (1) in a collapsed state, which support device (39) is connected to the foundation (10).

10. The novel crane (1) as claimed in claim 1, characterized in that the crane (1) comprises a stop device (18) to limit the rotation range of the upright (20) between a horizontal position and a substantially vertical working position with respect to the base (10), the stop device (18) being connected to the left and right uprights (12a, 12b) of the base (10), respectively, the connection position of the stop device (18) to the left and right uprights of the base (10) being adjustable.

11. The new crane (1) according to claim 1, characterized in that said crane (1) comprises at least one locking mechanism (42) to selectively fix said upright (20) in a position with respect to said base (10) in which the rotation section thereof corresponds to any first hole (17) on said base (10), said locking mechanism (42) being movable between a locked configuration suitable for fixing said upright (20) to said base (10) and an unlocked configuration suitable for releasing the fixed upright (20), said crane (1) further comprising a control module capable of controlling said locking mechanism (42).

12. A new crane (1) according to claim 11, characterized in that said locking mechanism (42) is arranged in a semi-closed chamber of a column (20), said column (20) defining at least a part of the outer surface of the locking mechanism (42), said locking mechanism (42) having at least one laterally movable cylindrical locking shaft (43), said cylindrical locking shaft (43) being fittingly arranged in a second hole (27) of the column, said cylindrical locking shaft (43) being capable of one-by-one correspondence with a first hole (17) of the base when the column (20) is rotated about the lateral axis (16) of the base (10), the locking mechanism (42) inserting said cylindrical locking shaft (43) in the first hole (17) corresponding thereto, fixing said column (20).

13. A new crane (1) according to claim 1, characterized in that the crane (1) comprises a winch (34) for lifting a load, which winch (34) is connected to the mast (20) through a mounting hole (48) of the rear panel (23) of the mast (20), which winch (34) is at least partly arranged to be mounted in a semi-closed chamber of the mast (20).

14. A new crane (1) according to claim 1, characterized in that the crane (1) comprises a slewing support mechanism (44), the base (10) being connected with the slewing support mechanism (44), the slewing support mechanism (44) being connected with a carriage (45) such that the crane (1) can rotate around a vertical axis Y.

15. A crane truck (100), the crane truck (100) comprising a chassis (46) and a crane (1), the crane (1) being mounted on the chassis (46) by means of a carriage (45), the carriage (45) being provided with hydraulic support legs (47), characterized in that the crane (1) is a crane according to any one of claims 1 to 14.