A multi-functional crane

Abstract

The multifunctional crane disclosed by the application comprises a base assembly, a stand column assembly, a cantilever assembly, a lifting oil cylinder and a hoisting assembly. The base assembly comprises a transverse telescopic support and a longitudinal telescopic support. The transverse telescopic support is fixedly provided with a connecting frame assembly. The end of the longitudinal telescopic support is hinged to the connecting frame assembly. The stand column assembly is provided as a telescopic stand column. The bottom end of the stand column assembly is fixedly connected to the connecting frame assembly. The top end of the stand column assembly is hinged to the cantilever assembly. The lifting oil cylinder is detachably hinged between the stand column assembly and the cantilever assembly. A brake mechanism cooperating with the lifting oil cylinder is arranged between the cantilever assembly and the stand column assembly. The application has better folding effect, is more conducive to space saving, can keep the workpiece at any height within the stroke during work, is convenient to control, has stable and reliable working performance, and can effectively avoid safety hazards.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of hoisting equipment, in particular to a multifunctional crane. BACKGROUND

[0002] The crane is a common hoisting equipment, which is mainly composed of a support frame and a hydraulic lifting device. The heavy object can be lifted to a proper height by the hydraulic lifting device. In the process of automobile repair, the engine and other objects of the automobile often need to be lifted by the crane. The conventional crane generally does not have a folding function, which leads to the need to occupy a large use space. Therefore, some foldable cranes appear on the market, for example, see the related Chinese patents disclosed in CN216377262U, CN108002246A and CN108341350A. Although the foldable crane in the prior art can be folded when not in use, which can save space to a certain extent, the folding effect is not good, especially in the process of packaging and transportation after production, there is still a problem of occupying a large space. In addition, in order to keep the workpiece at a proper height during work, the hydraulic lifting device usually needs to be pressure- maintained controlled to keep the hydraulic lifting device always exerting a lifting force on the workpiece, which not only has a large control difficulty and low stability, but also is prone to safety hazards. SUMMARY

[0003] The present application aims at the defects and deficiencies of the prior art, and provides a multifunctional crane, which has a simple and reasonable structure, better folding effect, is conducive to saving space, can keep the workpiece at any height within the stroke during work, has convenient control, stable and reliable working performance, and can effectively avoid safety hazards.

[0004] To achieve the above-mentioned purpose, the following technical solutions are adopted in the present application.

[0005] A multifunctional crane comprises a base assembly, a stand assembly, a cantilever assembly, a lifting cylinder and a lifting assembly, wherein the lifting assembly is arranged at the end of the cantilever assembly;

[0006] The base assembly comprises a transverse telescopic support and a longitudinal telescopic support, the transverse telescopic support is fixedly provided with a connecting frame assembly, and the end of the longitudinal telescopic support is hingedly connected with the connecting frame assembly, so that the longitudinal telescopic support can be unfolded and folded relative to the stand assembly in the vertical direction; the stand assembly is arranged as a telescopic stand, the bottom end of the stand assembly is fixedly connected with the connecting frame assembly, and the top end of the stand assembly is hingedly connected with the cantilever assembly, so that the cantilever assembly can be unfolded and folded relative to the stand assembly in the vertical direction;

[0007] The lifting oil cylinder is detachably articulated between the column assembly and the cantilever assembly; a brake mechanism cooperating with the lifting oil cylinder is arranged between the cantilever assembly and the column assembly, the brake mechanism comprising a brake sleeve, a threaded brake rod and a brake nut, a first end of the brake sleeve being detachably articulated with the cantilever assembly, a first end of the threaded brake rod being slidingly inserted into the brake sleeve, a second end of the threaded brake rod being detachably articulated with the column assembly, the brake nut being threadedly connected to the threaded brake rod, and the brake nut being located at a region of the threaded brake rod extending out of the brake sleeve.

[0008] Further, the lateral telescopic support comprises a lateral support and lateral extension supports arranged at two ends of the lateral support and telescopically cooperating with the lateral support; the connecting frame assembly comprises a pair of open upward "U"-shaped connecting frames fixed along a longitudinal direction to the lateral support, the longitudinal telescopic support comprises a longitudinal support and a longitudinal extension support, the longitudinal support being arranged in the "U"-shaped connecting frame, the "U"-shaped connecting frame being limitingly cooperated with the longitudinal support when the longitudinal telescopic support is unfolded relative to the column assembly, a first end of the longitudinal support being articulated with one end of the "U"-shaped connecting frame close to the lateral support, a middle part of the longitudinal support being fixedly connected to the other end of the "U"-shaped connecting frame away from the lateral support through a pin, and the longitudinal extension support being telescopically cooperated with the longitudinal support; two "U"-shaped connecting frames are fixedly connected with a fixed frame, and a bottom end of the column assembly is fixedly connected with the fixed frame.

[0009] Further, one end of the "U"-shaped connecting frame close to the lateral support is provided with a limiting seat, the limiting seat being limitingly cooperated with the longitudinal support when the longitudinal telescopic support is folded relative to the column assembly, the limiting seat is provided with a limiting pin hole, and the longitudinal support is provided with a fixed pin hole corresponding to the limiting pin hole.

[0010] Further, the column assembly comprises at least two unit columns, two adjacent unit columns telescopically cooperating, the unit column at a bottom end being fixedly connected with the connecting frame assembly, and the unit column at a top end being articulated with the cantilever assembly, the lifting oil cylinder being detachably articulated between the cantilever assembly and any one of the unit columns, and the second end of the threaded brake rod being detachably articulated with any one of the unit columns.

[0011] Further, the first end of the threaded brake rod is provided with a piston, the piston slidingly cooperating with an inner wall of the brake sleeve, and a second end of the brake sleeve is provided with a limiting assembly limitingly cooperating with the piston.

[0012] The limiting assembly comprises a limiting sleeve fixedly arranged at the second end of the brake sleeve, the limiting sleeve is in sliding fit with the threaded brake lever, and the limiting sleeve is in limiting fit with the piston.

[0013] Further, the cantilever assembly comprises a fixed cantilever and a telescopic cantilever, the fixed cantilever is hinged to the top of the column assembly, the lifting oil cylinder and the brake mechanism are both hinged between the fixed cantilever and the column assembly, and the lifting assembly is arranged at the end of the telescopic cantilever; the fixed cantilever and the telescopic cantilever are telescopically connected, the fixed cantilever is provided with a longitudinal oil cylinder in transmission connection with the telescopic cantilever, and the longitudinal oil cylinder is used to drive the telescopic cantilever to slide along the longitudinal direction relative to the fixed cantilever.

[0014] Further, the telescopic cantilever is provided with a transverse oil cylinder in transmission connection with the lifting assembly, and the transverse oil cylinder is used to drive the lifting assembly to slide along the transverse direction relative to the telescopic cantilever.

[0015] Further, the end of the telescopic cantilever is provided with a mounting seat, the transverse oil cylinder is arranged on the mounting seat, the mounting seat is provided with a linear guide rail, the lifting assembly comprises a lifting hook, a connecting support and a sliding block, the lifting hook is connected to the sliding block through the connecting support, the sliding block is in sliding fit with the linear guide rail, and the output end of the transverse oil cylinder is in transmission connection with the sliding block through a transmission connecting rod.

[0016] Further, the end of the telescopic cantilever is provided with a mounting seat, the transverse oil cylinder is arranged on the mounting seat, the mounting seat is provided with a linear guide rail, the lifting assembly comprises a mounting column, a lifting belt, a connecting support and a sliding block, the lifting belt is arranged at both ends of the mounting column, the mounting column is connected to the sliding block through the connecting support, the sliding block is in sliding fit with the linear guide rail, and the output end of the transverse oil cylinder is in transmission connection with the sliding block through a transmission connecting rod.

[0017] Further, the two ends of the mounting column are respectively movably inserted with telescopic columns, the telescopic columns are in telescopic fit with the mounting column, the telescopic columns are provided with adjusting pin holes along the length direction, the mounting column is provided with positioning pin holes in corresponding fit with the adjusting pin holes, and the lifting belt is arranged on the telescopic columns.

[0018] Compared with the prior art, the multifunctional crane has the following beneficial effects:

[0019] The folding effect is better, and space saving is facilitated, specifically, the horizontal telescopic support and the vertical telescopic support are arranged, the connecting frame assembly is arranged on the horizontal telescopic support, the vertical telescopic support is hinged to the connecting frame assembly, the telescopic column assembly is arranged as a telescopic column structure, the bottom end of the telescopic column assembly is fixed to the connecting frame assembly, the top end of the telescopic column assembly is hinged to the cantilever assembly, and the lifting oil cylinder and the brake mechanism are detachably hinged between the telescopic column assembly and the cantilever assembly, so that the present application can exhibit different forms according to actual needs: when packing and transporting, the lifting oil cylinder and the brake mechanism are detached from the telescopic column assembly and the cantilever assembly respectively, the horizontal telescopic support, the vertical telescopic support and the telescopic column assembly are adjusted to the contracted state, and the cantilever assembly and the vertical telescopic support are rotated respectively to make the cantilever assembly and the vertical telescopic support be in the folded state relative to the telescopic column assembly, at this time, the present application is in the contracted and folded state, the overall volume is minimum, the packing cost can be reduced and the storage capacity in unit volume can be increased, so that the packing / transportation cost can be reduced; when normally used, the horizontal telescopic support, the vertical telescopic support and the telescopic column assembly are arranged in the stretched state, the cantilever assembly and the vertical telescopic support are in the unfolded state relative to the telescopic column assembly, and the lifting oil cylinder and the brake mechanism are installed between the telescopic column assembly and the cantilever assembly, at this time, the present application is in the normal working state, so that the user can hoist the workpiece, and in this state, since the horizontal telescopic support and the vertical telescopic support are in the stretched state, the supportability of the base assembly to the whole crane is ensured, and the anti-toppling effect is better; when the user stores, that is, when the user temporarily stores the crane in the workshop, at this time, the horizontal telescopic support, the vertical telescopic support and the telescopic column assembly can be kept in the stretched state, and the lifting oil cylinder and the brake mechanism do not need to be detached, only the cantilever assembly and the vertical telescopic support need to be rotated relative to the telescopic column assembly to make the cantilever assembly and the vertical telescopic support be in the folded state, at this time, the present application is in the folded state, the overall volume is smaller (the volume of the present application in the "contracted and folded state" is about one half of the volume in the "folded state"), which can also save space and is convenient for the user to operate.

[0020] In another aspect, the present application sets brake mechanism between the column assembly and the cantilever assembly, under normal circumstances, the brake nut of the brake mechanism is located near the second end of the threaded brake rod, when working, the lifting cylinder drives the cantilever assembly to rotate relative to the column assembly, and the lifting operation on the workpiece is realized, in the process, the threaded brake rod and the brake sleeve slide relative to each other, when the workpiece is lifted to the set height, the brake nut is rotated, the brake nut moves along the threaded brake rod towards the second end of the brake sleeve until the brake nut abuts against the second end of the brake sleeve, at this time, the brake sleeve and the threaded brake rod do not slide relative to each other under the action of the gravity of the workpiece through the abutting cooperation of the brake nut and the brake sleeve, so that the brake locking is realized, therefore, the workpiece can be kept at the corresponding height without the pressure maintaining control on the lifting cylinder; since the brake mechanism realizes the brake locking through the abutting cooperation of the brake nut and the brake sleeve, and the brake sleeve and the threaded brake rod are in sliding sleeve connection, the workpiece can be kept at any height within the stroke, the control is convenient, the working performance is stable and reliable, and the safety hidden danger can be effectively avoided. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is the overall structure schematic diagram of the embodiment one of the present application.

[0022] Figure 2 is the lifting assembly installation structure schematic diagram of the embodiment one of the present application.

[0023] Figure 3 is the mounting seat, mounting column, transverse oil cylinder and telescopic column cooperation assembly structure schematic diagram in the embodiment one of the present application.

[0024] Figure 4 is the exploded structure schematic diagram of Figure 3 .

[0025] Figure 5 is the structure schematic diagram of the brake mechanism of the embodiment one of the present application

[0026] Figure 6 is the lifting assembly installation structure schematic diagram of the embodiment two of the present application.

[0027] Figure 7 is the exploded structure schematic diagram of the lifting assembly and the mounting seat of the embodiment two of the present application.

[0028] Figures 1-7 in the embodiment two of the present application.

[0029] 1, base assembly;

[0030] 11, transverse telescopic support;

[0031] 111, transverse support;

[0032] 112, transverse extension support;

[0033] 12. Longitudinal telescopic support;

[0034] 121. Longitudinal support;

[0035] 122. Longitudinal extension support;

[0036] 13. Connector assembly;

[0037] 131. U-shaped connecting bracket; 132. Fixing bracket; 133. Limiting seat; 134. Limiting pin hole;

[0038] 2. Column assembly;

[0039] 21. Unit columns;

[0040] 3. Cantilever assembly;

[0041] 31. Fixed cantilever; 32. Telescopic cantilever; 33. Mounting base; 331. Linear guide rail;

[0042] 4. Lifting cylinder;

[0043] 5. Lifting components;

[0044] 51. Hook; 52. Connecting bracket; 53. Sliding block; 54. Mounting column; 541. Positioning pin hole; 55. Lifting strap; 56. Telescopic column; 561. Adjusting pin hole;

[0045] 6. Braking mechanism;

[0046] 61. Brake sleeve; 62. Threaded brake lever; 63. Brake nut; 64. Piston; 65. Limit sleeve; 66. Fastening screw;

[0047] 7. Longitudinal hydraulic cylinder;

[0048] 8. Lateral hydraulic cylinder; 81. Transmission connecting rod;

[0049] 9. Split-type pump;

[0050] 10. Reversing valve. Detailed Implementation

[0051] The invention will now be further described with reference to the accompanying drawings.

[0052] Example 1

[0053] like Figures 1-5 The multi-functional crane shown includes a base assembly 1, a column assembly 2, a cantilever assembly 3, a lifting cylinder 4, and a hoisting component 5, which is located at the end of the cantilever assembly 3.

[0054] The base assembly 1 comprises a transverse telescopic support 11 and a longitudinal telescopic support 12, the transverse telescopic support 11 being capable of being telescopically extended to a first transverse length at which the transverse telescopic support 11 is in an extended state and a second transverse length at which the transverse telescopic support 11 is in a contracted state, the longitudinal telescopic support 12 being capable of being telescopically extended to a first longitudinal length at which the longitudinal telescopic support 12 is in an extended state and a second longitudinal length at which the longitudinal telescopic support 12 is in a contracted state.

[0055] The transverse telescopic support 11 is fixedly provided with a connecting frame assembly 13, and an end of the longitudinal telescopic support 12 is hingedly connected to the connecting frame assembly 13, so that the longitudinal telescopic support 12 is capable of being rotationally moved in a vertical direction to a first pivoting position and a second pivoting position, i.e. the longitudinal telescopic support 12 is capable of being unfolded and folded relative to the column assembly 2 in the vertical direction, at the first pivoting position, the longitudinal telescopic support 12 is horizontal, at which time the longitudinal telescopic support 12 is unfolded relative to the column assembly 2, at the second pivoting position, the longitudinal telescopic support 12 is vertically upward, the longitudinal telescopic support 12 is folded relative to the column assembly 2.

[0056] The column assembly 2 is provided as a telescopic column capable of being telescopically extended to a first vertical height at which the column assembly 2 is in an extended state and a second vertical height at which the column assembly 2 is in a contracted state. The bottom end of the column assembly 2 is fixedly connected to the connecting frame assembly 13, and the top end of the column assembly 2 is hingedly connected to the cantilever assembly 3, so that the cantilever assembly 3 is capable of being rotationally moved in a vertical direction to at least a third pivoting position and a fourth pivoting position, i.e. the cantilever assembly 3 is capable of being unfolded and folded relative to the column assembly 2 in the vertical direction, at the third pivoting position, the cantilever assembly 3 is horizontal or slightly inclined upward, at which time the cantilever assembly 3 is unfolded relative to the column assembly 2, at the fourth pivoting position, the cantilever assembly 3 is vertically downward or inclined downward, the cantilever assembly 3 is folded relative to the column assembly 2.

[0057] The lifting oil cylinder 4 is detachably hingedly connected between the column assembly 2 and the cantilever assembly 3; a brake mechanism 6 cooperating with the lifting oil cylinder 4 is arranged between the cantilever assembly 3 and the column assembly 2.

[0058] Preferably, in the embodiment, the transverse telescopic support 11 comprises a transverse support 111 and transverse extension supports 112 arranged at both ends of the transverse support 111, the transverse extension supports 112 are in telescopic cooperation with the transverse support 111, the transverse extension supports 112 are connected with the transverse support 111 through a plug-in pin, and the transverse telescopic support 11 can be telescoped into a first transverse length and a second transverse length by plugging and unplugging the plug-in pin; the connecting frame assembly 13 comprises a pair of open upward "U"-shaped connecting frames 131 fixed to the transverse support 111 in the longitudinal direction, the longitudinal telescopic support 12 comprises a longitudinal support 121 and a longitudinal extension support 122, the longitudinal support 121 is arranged in the "U"-shaped connecting frame 131, when the longitudinal telescopic support 12 is unfolded relative to the column assembly 2, i.e. the longitudinal telescopic support 12 is in a first pivoting position, the "U"-shaped connecting frame 131 is in limiting cooperation with the longitudinal support 121, a first end of the longitudinal support 121 is hinged to an end of the "U"-shaped connecting frame 131 close to the transverse support 111, and a middle part of the longitudinal support 121 is fixedly connected to an end of the "U"-shaped connecting frame 131 away from the transverse support 111 through a plug-in pin, so that the longitudinal telescopic support 12 can be rotated in the vertical direction to the first pivoting position and the second pivoting position by plugging and unplugging the plug-in pin. The longitudinal extension support 122 is in plug-in and telescopic cooperation with the longitudinal support 121, the longitudinal extension support 122 is connected with the longitudinal support 121 through a plug-in pin, so that the longitudinal telescopic support 12 can be telescoped into a first longitudinal length and a second longitudinal length by plugging and unplugging the plug-in pin. The two "U"-shaped connecting frames 131 are fixedly connected with a fixed frame 132, and the bottom end of the column assembly 2 is fixedly connected with the fixed frame 132.

[0059] An end of the "U"-shaped connecting frame 131 close to the transverse support 111 is provided with a limiting seat 133, when the longitudinal telescopic support 12 is folded relative to the column assembly 2, i.e. the longitudinal telescopic support 12 is in a second pivoting position, the limiting seat 133 is in limiting cooperation with the longitudinal support 121, the limiting seat 133 is provided with a limiting pin hole 134, the longitudinal support 121 is provided with a fixed pin hole (not shown in the figure, which is blocked by the "U"-shaped connecting frame 131) corresponding to and cooperating with the limiting pin hole 134, when the longitudinal telescopic support 12 is in the second pivoting position, the longitudinal support 121 can be locked by the plug-in pin through the cooperation of the limiting pin hole 134 and the fixed pin hole, which is convenient to use.

[0060] Preferably, in this embodiment, the column assembly 2 comprises two unit columns 21, the two unit columns 21 are telescopic matched, two adjacent unit columns 21 are connected through a plug, and the plug is plugged and unplugged, so that the column assembly 2 can be telescopic to the first vertical height and the second vertical height. Of course, in other embodiments, the unit column 21 can also be provided in multiple (such as three, four, etc.) according to actual needs. The unit column 21 at the bottom end is fixedly connected with the connecting frame assembly 13, the unit column 21 at the top end is hingedly connected with the cantilever assembly 3, the lifting oil cylinder 4 is detachably hingedly connected between the cantilever assembly 3 and the unit column 21 at the bottom end, and the brake mechanism 6 is detachably hingedly connected with the unit column 21 at the bottom end.

[0061] The multifunctional crane provided by the present application is provided with a transverse telescopic support 11 and a longitudinal telescopic support 12, the connecting frame assembly 13 is arranged on the transverse telescopic support 11, the longitudinal telescopic support 12 is hingedly connected with the connecting frame assembly 13, the column assembly 2 is arranged in a telescopic column structure, the bottom end of the column assembly 2 is fixed to the connecting frame assembly 13, the top end of the column assembly 2 is hingedly connected to the cantilever assembly 3, and the lifting oil cylinder 4 and the brake mechanism 6 are respectively detachably hingedly connected between the column assembly 2 and the cantilever assembly 3, so that the present application can exhibit different forms according to actual needs. Specifically, for example:

[0062] When packing and transporting, the lifting oil cylinder 4 and the brake mechanism 6 are respectively removed from the column assembly 2 and the cantilever assembly 3, the transverse telescopic support 11, the longitudinal telescopic support 12 and the column assembly 2 are all adjusted to the contracted state, and then the cantilever assembly 3 and the longitudinal telescopic support 12 are respectively rotated, so that the cantilever assembly 3 and the longitudinal telescopic support 12 are both in the folded state relative to the column assembly 2. At this time, the present application is in the contracted and folded state, the overall volume is the smallest, the packing cost can be reduced and the storage capacity per unit volume can be increased, so as to reduce the packing / transporting cost;

[0063] When normally used, the transverse telescopic support 11, the longitudinal telescopic support 12 and the column assembly 2 are all arranged in the extended state, the cantilever assembly 3 and the longitudinal telescopic support 12 are both in the unfolded state relative to the column assembly 2, and the lifting oil cylinder 4 and the brake mechanism 6 are respectively installed between the column assembly 2 and the cantilever assembly 3. At this time, the present application is in the normal working state, so as to be convenient for the user to lift and transport workpieces. Moreover, in this state, since the transverse telescopic support 11 and the longitudinal telescopic support 12 are both in the extended state, the supportability of the base assembly 1 to the whole crane can be ensured, and the anti-toppling effect is better;

[0064] When the user stores the crane, that is, the user parks the crane in the workshop, at this time, the transverse telescopic support 11, the longitudinal telescopic support 12 and the column assembly 2 can all be kept in the extended state, and the lifting oil cylinder 4 and the brake mechanism 6 do not need to be disassembled, only the cantilever assembly 3 and the longitudinal telescopic support 12 are rotated respectively, so that the cantilever assembly 3 and the longitudinal telescopic support 12 are both in the folded state relative to the column assembly 2, at this time, the present application is in the folded state, the overall volume is relatively small (the volume of the “shrinkage and folding state” of the present application is about one half of the “folding state”), which can also save space and is more convenient for the user to operate.

[0065] The brake mechanism 6 comprises a brake sleeve 61, a threaded brake rod 62 and a brake nut 63, the first end of the brake sleeve 61 is detachably hinged with the cantilever assembly 3, the first end of the threaded brake rod 62 is slidingly inserted into the brake sleeve 61, the second end of the threaded brake rod 62 is detachably hinged with the unit column 21 at the bottom end, the brake nut 63 is threadedly connected with the threaded brake rod 62, and the brake nut 63 is located at the region of the threaded brake rod 62 that extends out of the brake sleeve 61.

[0066] Under normal circumstances, the brake nut 63 of the brake mechanism 6 is located close to the second end of the threaded brake rod 62, and when working, the lifting oil cylinder 4 drives the cantilever to rotate relative to the column to realize the lifting operation of the workpiece, in this process, since the cantilever assembly 3 rotates relative to the column assembly 2, the threaded brake rod 62 slides relative to the brake sleeve 61, when the workpiece is lifted to the set height, the brake nut 63 is rotated, so that the brake nut 63 moves along the threaded brake rod 62 towards the second end of the brake sleeve 61, until the brake nut 63 abuts against the second end of the brake sleeve 61, at this time, through the abutting cooperation of the brake nut 63 and the brake sleeve 61, the brake nut 63 limits the brake sleeve 61, so that the brake sleeve 61 and the threaded brake rod 62 cannot slide relative to each other under the action of the gravity of the workpiece, that is, the threaded brake rod 62 cannot continue to slide towards the first end of the brake sleeve 61, so as to realize brake locking, which ensures that the workpiece cannot move downward with the cantilever assembly 3 under the action of gravity, so that the lifting oil cylinder 4 does not need to be pressure-keeping controlled, and the workpiece can be kept at the corresponding height; when it is needed to move the workpiece downward, only the brake nut 63 is reversely rotated, so that the brake nut 63 moves to the position close to the second end of the threaded brake rod 62, so as to realize the unlocking of the brake mechanism 6, at this time, the lifting oil cylinder 4 can drive the workpiece to move downward through the cantilever assembly 3. Since the brake mechanism 6 realizes brake locking through the abutting cooperation of the brake nut 63 and the brake sleeve 61, and the brake sleeve 61 and the threaded brake rod 62 are slidingly sleeved, so the workpiece can be kept at any height within the stroke.

[0067] Preferably, in this embodiment, in order to improve the stability of the threaded brake lever 62 relative to the brake sleeve 61 when sliding, the first end of the threaded brake lever 62 is provided with a piston 64 which is in sliding fit with the inner wall of the brake sleeve 61, and the second end of the brake sleeve 61 is provided with a limiting assembly which is in limiting fit with the piston 64; the limiting assembly comprises a limiting sleeve 65 and a fastening screw 66, the limiting sleeve 65 is arranged in the inner wall of the second end of the brake sleeve 61, and the limiting sleeve 65 is fixedly connected with the brake sleeve 61 through the fastening screw 66, the limiting sleeve 65 is in sliding fit with the threaded brake lever 62, and the limiting sleeve 65 is in limiting fit with the piston 64.

[0068] By arranging the limiting assembly composed of the limiting sleeve 65 and the fastening screw 66, on the one hand, the piston 64 can be prevented from sliding out of the brake sleeve 61, and the brake sleeve 61 and the threaded brake lever 62 can be prevented from falling off, and on the other hand, the limiting sleeve 65 and the piston 64 are in fit, which further improves the stability of the threaded brake lever 62 relative to the brake sleeve 61 when sliding, and prevents the threaded brake lever 62 from shaking when sliding.

[0069] Preferably, in this embodiment, the cantilever assembly 3 comprises a fixed cantilever 31 and a telescopic cantilever 32, the fixed cantilever 31 is hingedly connected to the top of the column assembly 2, the lifting oil cylinder 4 and the brake mechanism 6 are hingedly connected between the fixed cantilever 31 and the column assembly 2, and the hoisting assembly 5 is arranged at the end of the telescopic cantilever 32; the fixed cantilever 31 and the telescopic cantilever 32 are telescopically connected and telescopically fit, the fixed cantilever 31 is provided with a longitudinal oil cylinder 7 which is in transmission connection with the telescopic cantilever 32, and the longitudinal oil cylinder 7 is used to drive the telescopic cantilever 32 to slide along the longitudinal direction relative to the fixed cantilever 31; the telescopic cantilever 32 is provided with a transverse oil cylinder 8 which is in transmission connection with the hoisting assembly 5, and the transverse oil cylinder 8 is used to drive the hoisting assembly 5 to slide along the transverse direction relative to the telescopic cantilever 32.

[0070] By arranging the fixed cantilever 31 and the telescopic cantilever 32 which are telescopically connected, and arranging the lifting oil cylinder 4, the longitudinal oil cylinder 7 and the transverse oil cylinder 8 respectively, when working, the cantilever assembly 3 can be lifted by the lifting oil cylinder 4, so that the workpiece can move in the vertical direction, the telescopic cantilever 32 can be driven to slide relative to the fixed cantilever 31 by the longitudinal oil cylinder 7, so that the workpiece can move in the longitudinal direction, and the hoisting assembly 5 can be driven to slide relative to the telescopic cantilever 32 by the transverse oil cylinder 8, so that the workpiece can also move in the transverse direction, thereby enabling the workpiece to move in the three-axis (i.e. X-axis, Y-axis and Z-axis) space, effectively increasing the movable range of the workpiece, facilitating use, and being conducive to meeting the actual use requirements.

[0071] In addition, in order to control conveniently, the base assembly 1 or the column assembly 2 is provided with a split pump 9 in the embodiment, the split pump 9 is connected to the lifting oil cylinder 4, the longitudinal oil cylinder 7 and the transverse oil cylinder 8 through a reversing valve 10 respectively, so as to supply oil to the lifting oil cylinder 4, the longitudinal oil cylinder 7 and the transverse oil cylinder 8, and realize integrated control. It should be noted that the split pump 9 used in the embodiment is also called a hydraulic oil pump, and its specific structure and working principle can be referred to a manual variable hydraulic oil pump disclosed in Chinese patent (publication number CN205841180U), so it will not be repeated here. The reversing valve 10 is also called a multi-way valve. In view of the fact that the reversing valve 10 needs to be connected to the lifting oil cylinder 4, the longitudinal oil cylinder 7 and the transverse oil cylinder 8 respectively in the embodiment, the reversing valve 10 preferably adopts a three-way multi-way valve. The multi-way valve belongs to the prior art and is commonly used in hydraulic control systems. Its specific structure and working principle will not be repeated here. For example, a multi-way valve structure is disclosed in a tractor multi-way valve integrated with an automatic skip function disclosed in Chinese patent (publication number CN208918951U), and a full-load sensing type multi-way valve for a full-static pile driver crane is disclosed in Chinese patent (publication number CN202579407U).

[0072] Preferably, in the embodiment, the end of the telescopic cantilever 32 is provided with a mounting seat 33, the transverse oil cylinder 8 is arranged on the mounting seat 33, the mounting seat 33 is provided with a linear guide rail 331, the lifting assembly 5 includes a mounting column 54, a lifting belt 55, a connecting bracket 52 and a sliding block 53, the lifting belt 55 is arranged at both ends of the mounting column 54, the mounting column 54 is connected to the sliding block 53 through the connecting bracket 52, the sliding block 53 is in sliding cooperation with the linear guide rail 331, and the output end of the transverse oil cylinder 8 is in transmission connection with the sliding block 53 through a transmission connecting rod 81. Specifically, in the embodiment, the mounting seat 33 is in the shape of an open downward "U", the transverse oil cylinder 8 is arranged in the interior of the mounting seat 33, and the linear guide rail 331 is arranged on the inner walls of both sides of the mounting seat 33. By adopting the "U"-shaped mounting seat 33, the mounting of the transverse oil cylinder 8 and the arrangement of the linear guide rail 331 are more convenient, so that the structure is more compact and reasonable. In the embodiment, the linear guide rail 331 is a convex rib arranged on the inner walls of both sides of the mounting seat 33, the connecting bracket 52 is movably hung on the linear guide rail 331 through the sliding block 53, the mounting is more convenient, and the stability is higher.

[0073] In use, the workpiece can be directly lifted by the lifting belt 55, which not only has a simple and reasonable structure and is convenient to operate, but also enables the lifting belt 55 to always be perpendicular to the workpiece, so that the lifting belt 55 is not easy to slide during the movement of the workpiece, the stability is better, and the workpiece surface is not easy to be scratched or worn, which is beneficial to the protection of the workpiece surface.

[0074] Preferably, in the embodiment, the two ends of the mounting column 54 are movably inserted with the telescopic columns 56, the telescopic columns 56 are in telescopic cooperation with the mounting column 54, the telescopic columns 56 are provided with the adjusting pin holes 561 along the length direction, the mounting column 54 is provided with the positioning pin holes 541 corresponding to the adjusting pin holes 561, and the lifting belts 55 are arranged on the telescopic columns 56. Through the above structure, on the one hand, the position of the telescopic column 56 relative to the mounting column 54 can be adjusted according to the actual size of the workpiece, so as to adjust the distance between the two lifting belts 55, thereby achieving the effect of lifting different sizes of workpieces. After the distance between the lifting belts 55 is adjusted, the position of the telescopic column 56 can be locked by inserting the pin into the positioning pin hole 541 and the corresponding adjusting pin hole 561. On the other hand, when the crane is packed, transported or stored, the telescopic column 56 can also be adjusted to the shortest distance between the two telescopic columns 56, thereby further reducing the space occupied by the crane as a whole.

[0075] Embodiment two

[0076] The embodiment is basically the same as the structure of the above-mentioned embodiment one, and the difference lies in that the hook 51 is used to lift the workpiece in the embodiment. Specifically, referring to Figures 6-7 , the end of the telescopic cantilever 32 is provided with a mounting seat 33, the transverse oil cylinder 8 is arranged on the mounting seat 33, in order to improve the stability of the lifting assembly 5 when moving transversely relative to the telescopic cantilever 32, the mounting seat 33 is provided with a linear guide rail 331, the lifting assembly 5 includes the hook 51, the connecting bracket 52 and the sliding block 53, the hook 51 is used to lift the workpiece, the connecting bracket 52 is in the shape of “U”, the hook 51 is connected to the sliding block 53 through the connecting bracket 52, the sliding block 53 is in sliding cooperation with the linear guide rail 331, and the output end of the transverse oil cylinder 8 is in transmission connection with the sliding block 53 through the transmission connecting rod 81.

[0077] The above-mentioned is only the preferred embodiment of the present application, so that the equivalent changes or modifications made according to the structure, features and principles described in the patent application scope of the present application are included in the patent application scope of the present application.

Claims

1. A multifunctional crane, comprising a base assembly, a column assembly, a cantilever assembly, a lifting cylinder and a hoisting assembly, the hoisting assembly being arranged at the end of the cantilever assembly, characterized in that: the base assembly comprises a transverse telescopic support and a longitudinal telescopic support, the transverse telescopic support is fixedly provided with a connecting frame assembly, the end of the longitudinal telescopic support is hingedly connected with the connecting frame assembly, so that the longitudinal telescopic support can be unfolded and folded relative to the column assembly in the vertical direction; the column assembly is arranged as a telescopic column, the bottom end of the column assembly is fixedly connected with the connecting frame assembly, and the top end of the column assembly is hingedly connected with the cantilever assembly, so that the cantilever assembly can be unfolded and folded relative to the column assembly in the vertical direction; the lifting cylinder is detachably hingedly connected between the column assembly and the cantilever assembly; a brake mechanism cooperating with the lifting cylinder is arranged between the cantilever assembly and the column assembly, the brake mechanism comprises a brake sleeve, a threaded brake rod and a brake nut, the first end of the brake sleeve is detachably hingedly connected with the cantilever assembly, the first end of the threaded brake rod is slidingly inserted into the brake sleeve, the second end of the threaded brake rod is detachably hingedly connected with the column assembly, the brake nut is threadedly connected with the threaded brake rod, and the brake nut is located at the region of the threaded brake rod extending out of the brake sleeve; the cantilever assembly comprises a fixed cantilever and a telescopic cantilever, the fixed cantilever is hingedly connected with the top of the column assembly, the lifting cylinder and the brake mechanism are hingedly connected between the fixed cantilever and the column assembly, and the hoisting assembly is arranged at the end of the telescopic cantilever; the fixed cantilever and the telescopic cantilever are telescopically connected with each other, the fixed cantilever is provided with a longitudinal oil cylinder in transmission connection with the telescopic cantilever, and the longitudinal oil cylinder is used to drive the telescopic cantilever to slide relative to the fixed cantilever in the longitudinal direction; the telescopic cantilever is provided with a transverse oil cylinder in transmission connection with the hoisting assembly, and the transverse oil cylinder is used to drive the hoisting assembly to slide relative to the telescopic cantilever in the transverse direction; the end of the telescopic cantilever is provided with a mounting seat, the transverse oil cylinder is arranged on the mounting seat, a linear guide rail is arranged on the mounting seat, the hoisting assembly comprises a sliding block, the sliding block is slidingly connected with the linear guide rail, and the output end of the transverse oil cylinder is in transmission connection with the sliding block through a transmission connecting rod. ​ ​ ​ ​ ​ 2. The multi-purpose crane of claim 1, characterized in that: The transverse telescopic support comprises a transverse support and transverse extension supports arranged at both ends of the transverse support and telescopically connected with the transverse support; the connecting frame assembly comprises a pair of open "U"-shaped connecting frames fixed to the transverse support in the longitudinal direction, the longitudinal telescopic support comprises a longitudinal support and a longitudinal extension support, the longitudinal support is arranged in the "U"-shaped connecting frame, the "U"-shaped connecting frame is limitedly connected with the longitudinal support when the longitudinal telescopic support is unfolded relative to the column assembly, the first end of the longitudinal support is hingedly connected with one end of the "U"-shaped connecting frame close to the transverse support, the middle part of the longitudinal support is fixedly connected with the other end of the "U"-shaped connecting frame away from the transverse support through a pin, and the longitudinal extension support is telescopically connected with the longitudinal support; the two "U"-shaped connecting frames are fixedly connected with a fixed frame, and the bottom end of the column assembly is fixedly connected with the fixed frame.

3. The multi-purpose crane of claim 2, wherein: One end of the "U"-shaped connecting frame close to the transverse support is provided with a limiting seat, the limiting seat is limitedly connected with the longitudinal support when the longitudinal telescopic support is folded relative to the column assembly, the limiting seat is provided with a limiting pin hole, and the longitudinal support is provided with a fixed pin hole corresponding to the limiting pin hole.

4. The multi-purpose crane according to claim 1 or 2, characterized in that: The column assembly comprises at least two unit columns, adjacent two unit columns are telescopically connected, the unit column at the bottom end is fixedly connected with the connecting frame assembly, the unit column at the top end is hingedly connected with the cantilever assembly, the lifting oil cylinder is detachably hingedly connected between the cantilever assembly and any one of the unit columns, and the second end of the threaded brake rod is detachably hingedly connected with any one of the unit columns.

5. The multi-functional crane according to claim 1, characterized by: The first end of the threaded brake rod is provided with a piston, the piston is slidingly connected with the inner wall of the brake sleeve, the second end of the brake sleeve is provided with a limiting assembly limitedly connected with the piston. The limiting assembly comprises a limiting sleeve fixedly arranged at the second end of the brake sleeve, the limiting sleeve is slidingly connected with the threaded brake rod, and the limiting sleeve is limitedly connected with the piston.

6. The multi-functional crane according to claim 1, characterized by: The lifting assembly comprises a lifting hook and a connecting support, and the lifting hook is connected to the sliding block through the connecting support.

7. The multi-functional crane according to claim 1, characterized by: The lifting assembly comprises a mounting column, a lifting belt and a connecting support, the lifting belt is arranged at both ends of the mounting column, and the mounting column is connected to the sliding block through the connecting support.

8. The multi-functional crane according to claim 7, characterized by: Both ends of the mounting column are movably inserted with telescopic columns, the telescopic columns are telescopically connected with the mounting column, the telescopic columns are provided with adjusting pin holes in the length direction, the mounting column is provided with positioning pin holes corresponding to the adjusting pin holes, and the lifting belt is arranged on the telescopic columns.

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