Cantilever crane

Abstract

The invention belongs to the technical field of hoisting equipment, and discloses a cantilever crane which comprises a stand column, a rotating cross beam, a rotating driving assembly and a clamping assembly. The rotating cross beam is vertically connected to the stand column and can rotate around the stand column; the rotating driving assembly comprises a floating tensioning connecting piece, a rotating chain, a rotating chain wheel and a rotating driving piece, the rotating driving piece is arranged on the rotating cross beam and connected with the rotating chain wheel, the rotating driving piece is configured to drive the rotating chain wheel to rotate, the first end of the rotating chain is fixed to the stand column, and the second end of the rotating chain bypasses the rotating chain wheel; the rotating chain is arranged on the stand column and connected with a floating tensioning connecting piece arranged on the stand column, and the floating tensioning connecting piece can provide pulling force for the rotating chain to enable the rotating chain to be tensioned. The clamping assembly is arranged on the rotating cross beam in a lifting mode through the lifting driving assembly. The cantilever crane is high in rotation precision.

Description

Technical Field

[0001] The invention relates to the technical field of hoisting equipment, in particular to a cantilever crane. Background Art

[0002] The shield segment steel cage is mainly made by the shield segment flat mesh forming machine and the shield segment three-dimensional mesh forming machine. The shield segment flat mesh forming machine is mainly used for processing single-piece mesh, while the shield segment three-dimensional mesh forming machine is mainly used for processing three-dimensional mesh. During the processing, the material crane needs to automatically grab the single-piece mesh processed by the shield segment flat mesh forming machine and stack it into the mold of the shield segment three-dimensional mesh forming machine.

[0003] Cantilever cranes have the characteristics of small footprint, flexible movement, and wide application environment, and are widely used in the transportation of single-piece nets. However, cantilever cranes in the prior art mostly use the rotation method of motor + slewing support. When the crossbeam rotates to the preset position, it is easy to shake, and the rotation accuracy cannot meet the requirements of shield segment steel cage processing. Summary of the invention

[0004] The purpose of the present invention is to provide a cantilever crane to solve the problems of shaking and low rotation accuracy when the crossbeam rotates.

[0005] To achieve this object, the present invention adopts the following technical solutions:

[0006] A cantilever crane comprises a column, a rotating beam, a rotating drive assembly and a clamping assembly; the rotating beam is vertically connected to the column and can rotate with the column as the axis; the rotating drive assembly comprises a floating tensioning connector, a rotating chain, a rotating sprocket and a rotating drive member, the rotating drive member is arranged on the rotating beam and connected to the rotating sprocket, the rotating drive member is configured to drive the rotating sprocket to rotate, the first end of the rotating chain is fixed to the column, the second end of the rotating chain bypasses the rotating sprocket and is connected to the floating tensioning connector arranged on the column, the floating tensioning connector can provide tension to the rotating chain to keep the rotating chain tensioned; the clamping assembly can be lifted and lowered on the rotating beam through a lifting drive assembly.

[0007] Optionally, the floating tension connection member is a cylinder, and the cylinder is rotatably connected to the column through a fixed seat.

[0008] Optionally, the rotary drive assembly further includes a tensioning adjustment member and a tensioning seat, the tensioning seat is rotatably disposed on the column, the first end of the rotary chain is connected to the column via the tensioning adjustment member disposed on the tensioning seat, and the position of the tensioning adjustment member on the tensioning seat is adjustable.

[0009] Optionally, the tension adjustment member is screwed to the tension seat.

[0010] Optionally, the cantilever crane also includes a positioning assembly, which includes a positioning drive, a positioning pin and a positioning seat, the positioning drive is arranged on one of the rotating beam and the column, the positioning seat is arranged on the other of the rotating beam and the column, the positioning pin is arranged at the output end of the positioning drive, and the positioning seat is provided with a positioning hole for inserting the positioning pin.

[0011] Optionally, the positioning seat is arranged on the column through a fixing plate, and the circumferential position of the positioning seat on the fixing plate is adjustable.

[0012] Optionally, the fixing plate is provided with an arc-shaped slide rail coaxial with the column, the positioning seat is slidably arranged on the arc-shaped slide rail, and the positioning seat is locked on the fixing plate by a detachable locking member.

[0013] Optionally, two positioning drive members are circumferentially arranged on the rotating beam, the two positioning drive members are respectively located on both sides of the circumference of the rotating drive member, the two positioning pins are respectively connected to the two positioning drive members, and three positioning seats are circumferentially spaced apart on the column.

[0014] Optionally, the cantilever crane further includes guide wheels, at least two of which are rotatably disposed on the rotating beam and in rolling contact with the column.

[0015] Optionally, the cantilever crane further includes a transverse drive assembly, the lifting drive assembly is slidably disposed on the rotating beam along an extension direction of the rotating beam, and the transverse drive assembly is configured to drive the lifting drive assembly to move.

[0016] Beneficial effects of the present invention:

[0017] The cantilever crane in the present invention utilizes a rotating driving member to drive a rotating sprocket to rotate. Under the meshing action of the rotating sprocket and the rotating chain, the rotating sprocket drives the rotating crossbeam to rotate relative to the column. During the rotation process, the floating tension connecting member provides a tensioning force to the rotating chain, thereby reducing the possibility of shaking of the rotating crossbeam due to inertia when the rotating beam stops rotating. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Schematic diagram of the three-dimensional structure of the cantilever crane in the embodiment of the present invention;

[0019] Figure 2 yes Figure 1 The enlarged schematic diagram of point A in the middle;

[0020] Figure 3is a partial top view of the cantilever crane when the rotating crossbeam is in the first working position in the embodiment of the present invention;

[0021] Figure 4 is a partial top view of the cantilever crane when the rotating crossbeam is in the second working position in the embodiment of the present invention;

[0022] Figure 5 is a partial top view of the cantilever crane when the rotating crossbeam is in the third working position in the embodiment of the present invention;

[0023] Figure 6 is a top view of a cantilever crane according to an embodiment of the present invention;

[0024] Figure 7 is a cross-sectional view of a positioning assembly in an embodiment of the present invention.

[0025] In the figure:

[0026] 1. Column;

[0027] 2. Rotating beam;

[0028] 3. Rotary drive assembly; 31. Floating tension connector; 32. Rotary chain; 33. Rotary sprocket; 34. Rotary drive member; 35. Tension adjustment member; 36. Tension seat; 37. Fixed seat; 38. Mounting seat;

[0029] 4. Clamping assembly;

[0030] 5. Lifting drive assembly; 51. Transverse moving frame; 52. Lifting drive member; 53. Lifting frame; 54. Lifting sprocket assembly;

[0031] 6. Positioning assembly; 61. Positioning drive member; 62. Positioning pin; 63. Positioning seat; 63a. First positioning seat; 63b. Second positioning seat; 63c. Third positioning seat; 64. Connecting seat; 65. Fixing plate; 66. Arc slide rail;

[0032] 7. Transverse drive assembly; 71. Transverse drive member; 72. Support bearing; 73. Transverse driving sprocket; 74. Transverse driven sprocket; 75. Sprocket shaft;

[0033] 8. Guide wheel. DETAILED DESCRIPTION

[0034] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0035] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0037] In the description of this embodiment, the terms "upper", "lower", "right", etc., directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0038] refer to Figure 1-Figure 7 As shown, in an embodiment of the present invention, a cantilever crane is proposed for hoisting workpieces including but not limited to a single-piece net. The cantilever crane comprises a column 1, a rotating beam 2, a rotating drive assembly 3, a clamping assembly 4 and a lifting drive assembly 5, wherein the rotating beam 2 is vertically connected to the column 1 and can rotate with the column 1 as an axis, the clamping assembly 4 is arranged on the rotating beam 2, and is used to clamp the workpiece, and the lifting drive assembly 5 is configured to drive the clamping assembly 4 to rise and fall, the rotating drive assembly 3 comprises a floating tensioning connector 31, a rotating chain 32, a rotating sprocket 33 and a rotating drive member 34, the rotating drive member 34 is arranged on the rotating beam 2 and connected to the rotating sprocket 33, and is used to drive the rotating sprocket 33 to rotate, the first end of the rotating chain 32 is fixed on the column 1, the second end of the rotating chain 32 bypasses the rotating sprocket 33 and is connected to the floating tensioning connector 31 arranged on the column 1, the rotating chain 32 is meshed with the rotating sprocket 33, and the floating tensioning connector 31 provides tension to the rotating chain 32 to keep the rotating chain 32 in a tensioned state.

[0039] The above-mentioned cantilever crane utilizes the rotating driving member 34 to drive the rotating sprocket 33 to rotate. Under the meshing action of the rotating sprocket 33 and the rotating chain 32, the rotating sprocket 33 drives the rotating beam 2 to rotate relative to the column 1. During the rotation process, the floating tension connecting member 31 provides a tensioning force to the rotating chain 32, thereby reducing the possibility of shaking of the rotating beam 2 due to inertia when it stops rotating.

[0040] refer to Figure 1 and Figure 2 As shown, a mounting seat 38 is provided on the lower surface of one end of the rotating beam 2 close to the column 1, and the rotating driving member 34 is mounted on the rotating beam 2 through the mounting seat 38. The rotating driving member 34 adopts a motor, and the output shaft of the motor extends downward and is connected to the rotating sprocket 33. The floating tensioning connecting member 31 adopts a cylinder, and the piston end of the cylinder used as the floating tensioning connecting member 31 maintains a contraction tendency to keep the rotating chain 32 tight. Specifically, the cylinder is connected to the column 1 through a fixed seat 37, and the fixed seat 37 is rotatably connected to the column 1 through a first rotating shaft, and the axial direction of the first rotating shaft is the same as the height direction of the column 1.

[0041] In other embodiments, the floating tension connection member 31 may also be an oil-gas spring.

[0042] refer to Figure 2-Figure 4 As shown, the rotary drive assembly 3 also includes a tensioning adjusting member 35 and a tensioning seat 36. The first end of the rotary chain 32 is connected to the column 1 through the tensioning adjusting member 35 disposed on the tensioning seat 36. The tensioning seat 36 is rotatably disposed on the column 1 through a second rotary shaft. The axial direction of the second rotary shaft is also the same as the height direction of the column 1. It should be emphasized that the position of the tensioning adjusting member 35 on the tensioning seat 36 is adjustable. Specifically, the tensioning adjusting member 35 is screwed to the tensioning seat 36. By screwing the tensioning adjusting member 35, the rotary chain 32 is tightened.

[0043] Optionally, a tension adjusting member 35 is also connected between the cylinder as the floating tension connecting member 31 and the rotating chain 32, and the positions of the tension adjusting member 35 and the cylinder are adjustable to further increase the adjustability of the rotating chain 32. Specifically, the tension adjusting member 35 is also screwed to the piston end of the cylinder.

[0044] refer to Figure 2 , Figure 6 and Figure 7As shown, in order to further improve the stability of the rotating beam 2 when it stops rotating, the cantilever crane also includes a positioning assembly 6, which is used to lock the rotating beam 2 and the column 1. In this embodiment, the positioning assembly 6 includes a positioning drive 61, a positioning pin 62 and a positioning seat 63. The positioning drive 61 is arranged on one of the rotating beam 2 and the column 1, and the positioning seat 63 is arranged on the other of the rotating beam 2 and the column 1. The positioning pin 62 is arranged at the output end of the positioning drive 61, and the positioning seat 63 is provided with a positioning hole for the positioning pin 62 to be inserted.

[0045] Specifically, the positioning drive member 61 adopts a cylinder and is installed on the mounting seat 38 through a connecting seat 64, and the positioning seat 63 is fixed on the column 1 through a fixing plate 65. When the cylinder as the positioning drive member 61 is extended, the positioning pin 62 is inserted into the positioning hole to achieve the positioning between the rotating beam 2 and the column 1; when the cylinder as the positioning drive member 61 is retracted, the positioning pin 62 is separated from the positioning hole, which facilitates the rotation of the rotating beam 2.

[0046] More specifically, in order to reduce the difficulty of inserting the positioning pin 62 into the positioning hole, the positioning pin 62 is a conical pin.

[0047] In order to improve the stability of the rotating beam 2 during rotation, the cantilever crane further includes guide wheels 8 , at least two guide wheels 8 are rotatably disposed on the connecting seat 64 and are in rolling contact with the column 1 .

[0048] It is understood that the rotating crossbeam 2 on the cantilever crane includes at least two working positions, so that the workpiece can be transferred from one working position to another working position. Figure 3 ), the second working position ( Figure 4 ) and the third working position ( Figure 5 ) as an example, in this embodiment, there are two positioning drive members 61, namely the first positioning drive member and the second positioning drive member, the first positioning drive member and the second positioning drive member are respectively arranged on the circumferential sides of the rotating drive member 34 and are respectively connected with the first positioning pin and the second positioning pin, wherein the first positioning drive member is arranged on the side of the rotating drive member 34 close to the floating tensioning connecting member 31, and the second positioning drive member is arranged on the side of the rotating drive member 34 close to the tensioning seat 36, and there are three positioning seats 63, namely the first positioning seat 63a, the second positioning seat 63b and the third positioning seat 63c, which are arranged in sequence from the side close to the floating tensioning connecting member 31 to the side of the tensioning seat 36.

[0049] When the rotating beam 2 rotates to the first working position, the first positioning drive member drives the first positioning pin to be inserted into the first positioning seat 63a; when the rotating beam 2 rotates to the second working position, the first positioning drive member drives the first positioning pin to be inserted into the second positioning seat 63b; when the rotating beam 2 rotates to the third working position, the second positioning drive member drives the second positioning pin to be inserted into the third positioning seat 63c.

[0050] In this embodiment, the circumferential position of the positioning seat 63 on the fixed plate 65 is adjustable to adapt to different preset working positions of the rotating crossbeam 2. Specifically, an arc-shaped slide rail 66 is provided on the fixed plate 65, and the positioning seat 63 is slidably provided on the arc-shaped slide rail 66 and locked on the fixed plate 65 by a detachable locking member. It can be understood that the arc-shaped slide rail 66 is coaxial with the column 1. When adjusting the position of the positioning seat 63, it is only necessary to remove the locking member and adjust the position of the positioning seat 63 on the fixed plate 65. Specifically, the locking member is a bolt, and the bolt can be inserted between the fixed plate 65 and the positioning seat 63.

[0051] It is understandable that, according to the number of preset working positions of the rotating beam 2 , the number of the positioning driving members 61 and the positioning seats 63 can also be adaptively adjusted, which is not completely consistent with the present embodiment.

[0052] refer to Figure 6 As shown, the lifting drive assembly 5 includes a lifting drive member 52, a lifting sprocket group 54 and a lifting frame 53. The lifting frame 53 is slidably arranged on the rotating beam 2 along the height direction of the column 1. The clamping assembly 4 is arranged at the lower end of the lifting frame 53. The lifting drive member 52 is arranged on the rotating beam 2 and is connected to the lifting frame 53 through the lifting sprocket group 54 to drive the lifting frame 53 to move up and down, thereby driving the clamping assembly 4 to move up and down. In this embodiment, the lifting drive member 52 adopts a motor, and the clamping assembly 4 can adopt different clamping structures in the prior art according to different clamping workpieces, which are not specifically limited here.

[0053] In order to increase the operating range of the cantilever crane, the cantilever crane also includes a transverse drive assembly 7. The lifting drive assembly 5 is slidably arranged on the rotating beam 2 along the extension direction of the rotating beam 2 through a transverse moving frame 51. The transverse drive assembly 7 is configured to drive the lifting drive assembly 5 to move along the extension direction of the rotating beam 2.

[0054] Specifically, the transverse drive assembly 7 includes a transverse drive member 71, a transverse driving sprocket 73, a transverse driven sprocket 74 and a transverse chain. The transverse drive member 71 adopts a motor. The output shaft of the motor vertically penetrates the rotating beam 2 in the horizontal direction and is limited on the rotating beam 2 through a support bearing 72. The transverse driving sprocket 73 is sleeved on the output shaft of the motor and is located in the rotating beam 2. The transverse driven sprocket 74 is rotatably arranged at the end of the rotating beam 2 away from the column 1 through a sprocket shaft 75. The transverse chain is wound between the transverse driving sprocket 73 and the transverse driven sprocket 74 to realize a transmission connection between the transverse driving sprocket 73 and the transverse driven sprocket 74. The transverse moving frame 51 is fixed on the transverse chain to move driven by the transverse chain.

[0055] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. Cantilever crane, characterized in that: The cantilever crane comprises: Column (1); A rotating crossbeam (2), the rotating crossbeam (2) being vertically connected to the upright column (1) and being capable of rotating around the upright column (1); A rotary drive assembly (3), the rotary drive assembly (3) comprising a floating tensioning connector (31), a rotary chain (32), a rotary sprocket (33) and a rotary drive member (34), the rotary drive member (34) being arranged on the rotary crossbeam (2) and connected to the rotary sprocket (33), the rotary drive member (34) being configured to drive the rotary sprocket (33) to rotate, the first end of the rotary chain (32) being fixed on the column (1), the second end of the rotary chain (32) passing around the rotary sprocket (33) and being connected to the floating tensioning connector (31) arranged on the column (1), the floating tensioning connector (31) being capable of providing a pulling force to the rotary chain (32) so that the rotary chain (32) is kept tensioned; A clamping assembly (4), wherein the clamping assembly (4) is escalably arranged on the rotating crossbeam (2) via a lifting drive assembly (5).

2. The cantilever crane according to claim 1, characterized in that: The floating tension connection member (31) is a cylinder, and the cylinder is rotatably connected to the column (1) via a fixed seat (37).

3. The cantilever crane according to claim 1, characterized in that: The rotary drive assembly (3) further comprises a tensioning adjusting member (35) and a tensioning seat (36); the tensioning seat (36) is rotatably arranged on the column (1); the first end of the rotary chain (32) is connected to the column (1) via the tensioning adjusting member (35) arranged on the tensioning seat (36); and the position of the tensioning adjusting member (35) on the tensioning seat (36) is adjustable.

4. The cantilever crane according to claim 3, characterized in that: The tension adjustment member (35) is screwed to the tension seat (36).

5. The cantilever crane according to claim 1, characterized in that: The cantilever crane also includes a positioning assembly (6), the positioning assembly (6) including a positioning drive member (61), a positioning pin (62) and a positioning seat (63), the positioning drive member (61) is arranged on one of the rotating crossbeam (2) and the column (1), the positioning seat (63) is arranged on the other of the rotating crossbeam (2) and the column (1), the positioning pin (62) is arranged at the output end of the positioning drive member (61), and the positioning seat (63) is provided with a positioning hole for the positioning pin (62) to be inserted.

6. The cantilever crane according to claim 5, characterized in that: The positioning seat (63) is arranged on the column (1) via a fixing plate (65), and the circumferential position of the positioning seat (63) on the fixing plate (65) is adjustable.

7. The cantilever crane according to claim 6, characterized in that: The fixing plate (65) is provided with an arc-shaped slide rail (66) coaxial with the column (1), the positioning seat (63) is slidably arranged on the arc-shaped slide rail (66), and the positioning seat (63) is locked on the fixing plate (65) via a detachable locking member.

8. The cantilever crane according to claim 6, characterized in that: Two positioning drive members (61) are circumferentially arranged on the rotating cross beam (2), the two positioning drive members (61) are respectively located on both sides of the circumference of the rotating drive member (34), the two positioning pins (62) are respectively connected to the two positioning drive members (61), and three positioning seats (63) are circumferentially arranged on the column (1) at intervals.

9. The cantilever crane according to claim 1, characterized in that: The cantilever crane also includes guide wheels (8), at least two of which are rotatably arranged on the rotating crossbeam (2) and are in rolling contact with the column (1).

10. The cantilever crane according to claim 1, characterized in that: The cantilever crane further comprises a transverse drive assembly (7), the lifting drive assembly (5) is slidably arranged on the rotating beam (2) along the extension direction of the rotating beam (2), and the transverse drive assembly (7) is configured to drive the lifting drive assembly (5) to move.

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