crane

Abstract

The present invention relates to a crane, comprising: a vehicle body (1); a slewing platform (2), which is mounted on the vehicle body (1) and can rotate in a horizontal plane relative to the vehicle body (1); a boom (3), which is mounted on the slewing platform (2) and can pitch and swing relative to the slewing platform (2); and an anti-tilting part (4), which comprises a rod-shaped component that forms a triangular structure with the slewing platform (2) and the boom (3), a first connecting part (43) provided on the rod-shaped component and used to connect the slewing platform (2), and a second connecting part (44) provided on the rod-shaped component and used to connect the boom (3). By applying the technical solution of the present application, the two ends of the rod-shaped component of the anti-tilting part are respectively connected to the boom and the slewing platform, thereby improving the problem that the anti-tilting device in the prior art can only prevent the boom from tipping in one direction.

Description

Technical Field

[0001] The present invention relates to the field of engineering machinery and equipment, and in particular to a crane. Background Art

[0002] Figure 1 FIG. 1 shows a schematic diagram of the structure of a crane of related technology. Figure 1 As shown, the crane of the related art includes a car body 1', a slewing platform 2' mounted on the car body 1' rotatably in a horizontal plane, a boom 3' mounted on the slewing platform 2' and capable of pitching and swinging, and a driving device for driving the boom 3' to rotate relative to the slewing platform 2' in a first direction. The driving device includes a rotatable drum and a rope-like component wound on the drum, the rope-like component is connected to the boom 3', and when the drum rotates to wind the rope-like component on the drum, the rope-like component pulls the boom 3' to rotate in the first direction. In order to prevent the boom 3 from tipping over due to the rotation in the first direction after rotating to a position perpendicular to the slewing platform 2', the crane also includes an anti-tipping device, the anti-tipping device includes a rod-like component 4' for preventing the boom 3' from tipping over due to the continuous rotation in the first direction after rotating to a position perpendicular to the slewing platform 2', and the rod-like component 4', the crane 3 and the slewing platform 2' form a triangular structure. The first end of the rod-shaped component 4 abuts against the rotary platform 2', and the second end of the rod-shaped component 4' is connected to the boom 3' via a pin. Therefore, the rod-shaped component 4' can only prevent the boom 3' from tipping over in a first direction, and when the boom 3' tips over in a second direction opposite to the first direction, the rod-shaped component 4' is separated from the rotary platform 2'. Summary of the invention

[0003] The present invention aims to provide a crane to improve the problem in the prior art that the anti-dumping device can only prevent the crane arm from dumping in one direction.

[0004] According to one aspect of an embodiment of the present invention, the present invention provides a crane, the crane comprising:

[0005] Vehicle body;

[0006] A slewing platform is mounted on the vehicle body and can rotate in a horizontal plane relative to the vehicle body;

[0007] A crane arm is mounted on the slewing platform and can pitch and swing relative to the slewing platform; and

[0008] The anti-tilt part comprises a rod-shaped component which forms a triangular structure with the slewing platform and the boom, a first connection part which is arranged on the rod-shaped component and used to connect the slewing platform, and a second connection part which is arranged on the rod-shaped component and used to connect the boom.

[0009] Optionally, the distance between the first connecting portion and the second connecting portion is adjustable.

[0010] Optionally, the anti-tilt portion further comprises:

[0011] A first threaded connection structure, used to connect the rod-shaped component and the first connection portion and to adjust the distance between the first connection portion and the rod-shaped component; or

[0012] The second threaded connection structure is used to connect the rod-shaped component and the second connection portion and to adjust the distance between the second connection portion and the rod-shaped component.

[0013] Optionally, the first connection portion is detachably connected to the lifting and revolving platform, and the second connection portion is hinged to the lifting arm.

[0014] Optionally, the crane further comprises:

[0015] A third connection part, provided on the rotary platform, used to connect to the first connection part;

[0016] The guide rail is arranged on the slewing platform and extends toward the third connecting part in a straight line direction, and is used for guiding the first connecting part toward the third connecting part when the boom swings relative to the slewing platform.

[0017] Optionally, the anti-tilt portion further comprises a sliding component slidably matched with the guide rail, the sliding component is connected to one end of the rod-shaped component adjacent to the guide rail, and the distance between the sliding component and the second connecting portion can be adjusted as the boom swings relative to the slewing platform.

[0018] Optionally, the rod-shaped component includes a hydraulic cylinder, which includes a cylinder body and a piston rod that can extend from a first end of the cylinder body, a first connecting portion is connected to the first end of the cylinder body, a second connecting portion is connected to the second end of the cylinder body, and a sliding component is connected to an end of the piston rod away from the cylinder body.

[0019] Optionally, the rod-shaped component further includes a connecting rod, a first end of the connecting rod is connected to the second end of the cylinder body, and a second end of the connecting rod is connected to the second connecting portion.

[0020] Optionally, a connecting structure for connecting to the third connecting part is provided on the sliding component.

[0021] Optionally, the crane further comprises a driving device for driving the boom to swing relative to the slewing platform, the driving device comprising:

[0022] Roll, mounted on a rotary platform,

[0023] The rope-like component is wound on the drum and connected to the boom. The rope-like component and the anti-tilt portion are located on the same side of the boom.

[0024] By applying the technical solution of the present application, both ends of the rod-shaped component of the anti-tilt portion are respectively connected to the boom and the slewing platform, thereby improving the problem in the prior art that the anti-tilt device can only prevent the boom from tipping in one direction.

[0025] Further features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0027] Figure 1 A structural schematic diagram of a crane of related technology is shown;

[0028] Figure 2 A schematic structural diagram of a crane according to an embodiment of the present invention is shown;

[0029] Figure 3 a partial enlarged view of a crane showing an embodiment of the present invention; and

[0030] Figure 4 Another enlarged partial view of a crane showing an embodiment of the present invention.

[0031] In the figure:

[0032] 1. Car body; 2. Rotating platform; 3. Lifting arm; 4. Anti-tilt part; 41. Hydraulic cylinder; 42. Connecting rod; 43. First connecting part; 44. Second connecting part; 45. Sliding part; 5. Boom plate; 6. Mast; 7. Guide rail; 81. First pin shaft; 82. Second pin shaft; 9. Third connecting part. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] Figure 2 The schematic diagram of the structure of the crane of this embodiment is shown. Figure 3 A partial enlarged view of the crane of this embodiment is shown. Figure 4 Another partial enlarged view of the crane of this embodiment is shown.

[0035] Combination Figures 2 to 4 As shown, the crane of this embodiment includes a car body 1, a slewing platform 2 installed on the car body 1 and rotatable in a horizontal plane relative to the car body 1, a boom 3 installed on the slewing platform 2 and capable of pitching and swinging relative to the slewing platform 2, and an anti-tilt portion 4 for preventing the boom 3 from tipping over, the anti-tilt portion 4 includes a rod-shaped component forming a triangular structure with the slewing platform 2 and the boom 3, a first connecting portion 43 provided on the rod-shaped component and used for connecting to the slewing platform 2, and a second connecting portion 44 provided on the rod-shaped component and used for connecting to the boom 3.

[0036] The rod-shaped component of the anti-tilt part 4 forms a triangular structure with the revolving platform 2 and the boom 3, and the two ends of the rod-shaped component are respectively connected to the boom 3 and the revolving platform 2. Therefore, the anti-tilt part 4 can prevent the boom 3 from tipping toward the side where the anti-tilt part 4 is provided, and can also prevent the boom 3 from tipping toward the side away from the anti-tilt part 4.

[0037] The crane further includes a driving device for driving the boom 3 to swing relative to the slewing platform 2, the driving device including a drum mounted on the slewing platform 2 and a rope-like component wound on the drum and connected to the boom 3, the rope-like component and the anti-tilt portion 4 being located on the same side of the boom 3. The crane further includes a mast 6 and a luffing plate 5 connecting the mast 6 and the boom 3.

[0038] The rod-shaped component 4 includes a hydraulic cylinder 41 and a connecting rod 42. The hydraulic cylinder 41 includes a cylinder body and a piston rod 41a that can extend from a first end of the cylinder body. A first connecting portion 43 is connected to the first end of the cylinder body. The first end of the connecting rod 42 is connected to the second end of the cylinder body, and the second end of the connecting rod 42 is connected to the second connecting portion 44.

[0039] The first connection part 43 is connected to the third connection part 9 on the revolving platform 2 via a first pin shaft 81 , and the second connection part 44 is connected to the lifting arm 3 via a second pin shaft 82 .

[0040] The overall length of the anti-tilt portion 4 can be adjusted, that is, the distance between the first connection portion 43 and the second connection portion 44 can be adjusted, so that the anti-tilt portion 4 can be adjusted accordingly according to the specific size of the crane.

[0041] In this embodiment, the first connection part 43 is connected to the first end of the cylinder body of the hydraulic cylinder 41 through a first threaded connection structure. The first threaded connection structure can be used to adjust the distance between the first connection part 43 and the cylinder body, thereby adjusting the distance between the first connection part 43 and the second connection part 44.

[0042] In some embodiments, the second connection portion 44 is connected to the connecting rod 42 via a second threaded connection structure, and the second threaded connection structure can be used to adjust the distance between the second connection portion 44 and the connecting rod 42 , thereby adjusting the distance between the first connection portion 43 and the second connection portion 44 .

[0043] In this embodiment, the first connection portion 43 is detachably connected to the rotary platform 2 , and the second connection portion 44 is hinged to the boom 3 .

[0044] The revolving platform 2 is provided with a third connecting portion 9 for connecting the first connecting portion 43 and a guide rail 7 extending toward the third connecting portion 9 in a straight direction. The guide rail 7 is used to guide the first connecting portion 43 toward the third connecting portion 9 when the boom 2 swings relative to the revolving platform 2.

[0045] The anti-tilt part 4 also includes a sliding component 45 connected to the end of the piston rod 41a of the hydraulic cylinder 41 away from the cylinder body. The sliding component 45 is slidably matched with the guide rail 7. During the swinging of the boom 3 relative to the revolving platform 2, the piston rod 41a is extended and retracted relative to the cylinder body, so that the distance between the sliding component 45 and the second connecting part 44 can be adjusted as the boom 3 swings relative to the revolving platform 2, thereby causing the sliding component 45 to move along the guide rail 7.

[0046] The sliding member 45 is provided with a connection structure for connecting the third connection part 9, the connection structure includes a first pin hole, a second pin hole is provided on the first connection part 43, and a third pin hole is provided on the third connection part 9. After the first connection part 43 is guided to a position matching with the third connection part 9, the first pin 81 is inserted into the first pin hole, the second pin hole and the third pin hole to connect the first connection part 43, the sliding member 45 and the third connection part 9 together. Then, after the hydraulic cylinder is depressurized, the anti-tilt part 4 can also keep the boom 3 at a predetermined position.

[0047] The first end of the cylinder body of the hydraulic cylinder 41 is connected to the first connecting part 43 through a threaded connection structure. By controlling the screwing depth of the first connecting part 43 along the thread, the overall length of the anti-tilt part 4 can be fine-tuned. After adjustment, the thread is locked, which is convenient for controlling the synchronization and force balance of the anti-tilt part, and no further adjustment is required. In the specific assembly process, since the end of the piston rod 41 of the hydraulic cylinder 4 is provided with a sliding component 45, through the expansion and contraction of the piston rod 41a of the hydraulic cylinder 41, the sliding component 45 slides along the guide rail 7 to the position where it cooperates with the third connecting part 9, so as to realize the automatic centering of the first connecting part 43 and the third connecting part 9 on the rotary platform 2, and then the first pin 81 is assembled, wherein the pin holes on the sliding component 45, the first connecting part 43 and the third connecting part 9 are aligned, and the positioning is accurate. The inner diameter of the pin hole on the sliding component 45 is larger than the inner diameter of the pin hole on the third connecting part 9 and the inner diameter of the pin hole on the first connecting part 43, so that the manufacturing error is accommodated and the installation is convenient. After the two ends of the anti-tilt part 4 are respectively connected to the boom 3 and the slewing platform 2 through the first pin shaft 81 and the second pin shaft 82, the hydraulic cylinder 41 is depressurized. When the crane is operating, the anti-tilt part 4 can protect the safety of the main boom from tilting backward and forward.

[0048] The present embodiment relates to a boom anti-tilt device installed between the boom 3 and the slewing platform 2 of a crawler crane. The anti-tilt part 4 is mainly composed of a connecting rod 42 and a telescopic hydraulic cylinder 41. The first end of the cylinder body of the hydraulic cylinder 41 is equipped with a first connecting part 43. The end of the piston rod 41a is provided with a sliding component 45. By adjusting the telescopic movement of the piston rod 41a, the first connecting part 43 and the third connecting part 9 on the slewing platform 2 are automatically positioned and aligned in coordination with the guide rail 7. The two ends of the anti-tilt part 4 are equipped with fixed pins, which can protect the boom from tilting backwards or tilting forwards during crane operation, and can achieve a maximum elevation angle of 90° for the boom, making it safer and more reliable when lifting weights. Self-positioning can be achieved during assembly through the guide slide, making assembly convenient and quick.

[0049] 1) The anti-tilt part 4 and the boom 3 are connected through the second pin. During the rising process of the boom 3, the sliding part 45 at the end of the piston rod 41a of the hydraulic cylinder 41 can be connected to the third connecting part 9 on the slewing platform through the pin, and the main boom is prevented from tilting backward by the pressure of the hydraulic cylinder 41, and the anti-tilt rod is under pressure; when the boom 3 reaches 90°, the sliding part 45, the first connecting part 43 and the third connecting part 9 are connected through the pin, and the hydraulic cylinder is relieved to realize the anti-forward and backward tilting of the boom 3, and the anti-tilt rod is under pressure; the two ends of the rod-shaped part are respectively connected to the boom 3 and the slewing platform 2 through the pin, so as to protect the safety of the boom 3 when the backward and forward tilt angles change during the operation of the crane.

[0050] 2) The first end of the cylinder body of the hydraulic cylinder 41 is connected to the first connecting part 43 through a threaded connection structure. By controlling the screwing depth of the first connecting part 43 along the thread, the overall length of the anti-tilt part 4 is fine-tuned. After adjustment, the thread is locked to facilitate control of the synchronization and force balance of the two anti-tilt parts 4 without the need for further adjustment.

[0051] 3) The centers of the sliding component 45, the arc at the end of the guide rail 7, the pin hole of the first connecting part 43 and the pin hole of the third connecting part 9 are collinear, and the positioning is accurate; the inner diameter of the pin hole on the sliding component 45 is larger than the inner diameter of the pin hole on the first connecting part and the pin hole on the third connecting part, which accommodates manufacturing errors and is easy to install.

[0052] The above description is only an exemplary embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A crane, characterized in that: include: Vehicle body (1); A rotating platform (2) is mounted on the vehicle body (1) and can rotate relative to the vehicle body (1) in a horizontal plane; A boom (3) is mounted on the revolving platform (2) and can pitch and swing relative to the revolving platform (2); and an anti-tilt portion (4) comprises a rod-shaped component forming a triangular structure with the revolving platform (2) and the boom (3), a first connecting portion (43) provided on the rod-shaped component and used to connect to the revolving platform (2), and a second connecting portion (44) provided on the rod-shaped component and used to connect to the boom (3); The second connecting portion (44) is hingedly connected to the lifting arm (3); A third connecting portion (9), provided on the rotating platform (2) and used for connecting to the first connecting portion (43); A guide rail (7) is provided on the revolving platform (2) and extends in a straight line toward the third connecting portion (9), and is used to guide the first connecting portion (43) toward the third connecting portion (9) when the boom (3) swings relative to the revolving platform (2); The anti-tilt portion (4) further comprises a sliding component (45) slidably matched with the guide rail (7), the sliding component (45) being connected to one end of the rod-shaped component adjacent to the guide rail (7), and the distance between the sliding component (45) and the second connecting portion (44) being adjustable as the lifting arm (3) swings relative to the slewing platform (2). The sliding component (45) is provided with a connection structure for connecting to the third connection part (9), the connection structure comprising a first pin shaft hole, the first connection part (43) is provided with a second pin shaft hole, and the third connection part (9) is provided with a third pin shaft hole. After the first connection part (43) is guided to a position matching with the third connection part (9), the first pin shaft (81) is inserted into the first pin shaft hole, the second pin shaft hole and the third pin shaft hole, so as to connect the first connection part (43), the sliding component (45) and the third connection part (9) together.

2. The crane according to claim 1, characterized in that: The distance between the first connecting portion (43) and the second connecting portion (44) is adjustable.

3. The crane according to claim 2, characterized in that: The anti-tilt portion (4) further comprises: A first threaded connection structure is used to connect the rod-shaped component and the first connection part (43) and to adjust the distance between the first connection part (43) and the rod-shaped component; or a second threaded connection structure is used to connect the rod-shaped component and the second connection part (44) and to adjust the distance between the second connection part (44) and the rod-shaped component.

4. The crane according to claim 1, characterized in that: The first connecting portion (43) is detachably connected to the rotating platform (2).

5. The crane according to claim 1, characterized in that: The rod-shaped component includes a hydraulic cylinder (41), which includes a cylinder body and a piston rod (41a) that can extend from the first end of the cylinder body, the first connecting part (43) is connected to the first end of the cylinder body, the second connecting part (44) is connected to the second end of the cylinder body, and the sliding component (45) is connected to the end of the piston rod (41a) away from the cylinder body.

6. The crane according to claim 5, characterized in that: The rod-shaped component further comprises a connecting rod (42), a first end of the connecting rod (42) being connected to the second end of the cylinder body, and a second end of the connecting rod (42) being connected to the second connecting portion (44).

7. The crane according to claim 5, characterized in that: The sliding component (45) is provided with a connection structure for connecting to the third connection part (9).

8. The crane according to claim 1, characterized in that: It also includes a driving device for driving the lifting arm (3) to swing relative to the rotating platform (2), and the driving device includes: A drum is installed on the revolving platform (2); a rope-like component is wound around the drum and connected to the lifting arm (3); the rope-like component and the anti-tilt portion (4) are located on the same side of the lifting arm (3).

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