A crane boom with a single-cylinder five-section arm telescopic mechanism and a working method thereof

Abstract

The present application relates to a kind of crane jib with single cylinder five-section arm telescopic mechanism and its working method.The crane jib includes crane jib unit, telescopic drive unit, arm extension cable unit and arm retraction cable unit.Crane jib unit includes one-section arm, two-section arm, three-section arm, four-section arm and five-section arm arranged in sequence.Arm extension cable unit includes three-section arm extension cable, four-section arm extension cable and five-section arm extension cable.The present application uses single cylinder five-section arm telescopic mechanism, optimizes wire rope winding mode inside, reduces the space proportion of wire rope in cylinder, saves cylinder section, cancels one four-section arm retraction cable on the basis of traditional single cylinder five-section arm telescopic mechanism, shares with five-section arm extension cable, saves cost, and compared with traditional telescopic mode, reduces a section of arm extension cable length, i.e.the fixed position of cable changes.

Description

Technical Field

[0001] This invention relates to the field of crane technology, specifically to a crane boom with a single-cylinder five-section telescopic mechanism and its working method. Background Technology

[0002] The boom, a crucial working component of a truck crane, utilizes luffing and telescopic mechanisms to achieve various boom length combinations for lifting operations. Five-section booms are the mainstream product on the market. Traditional five-section booms use two extension cylinders for telescopic operation, resulting in a heavy and costly overall boom. In recent years, some single-cylinder booms have appeared on the market; however, excessive wire rope winding within the internal space affects the cylinder's cross-sectional dimensions, thus limiting the crane's lifting performance. Summary of the Invention

[0003] To address the shortcomings of existing technologies, the present invention aims to provide a crane boom with a single-cylinder five-section telescopic mechanism and its operating method.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A lifting boom with a single-cylinder five-section telescopic mechanism, the lifting boom comprising a lifting boom unit, a telescopic drive unit, an extension cable unit, and a retraction cable unit;

[0006] The lifting boom unit includes a first boom section, a second boom section, a third boom section, a fourth boom section, and a fifth boom section arranged sequentially.

[0007] The telescopic arm cable unit includes a three-section telescopic arm cable, a four-section telescopic arm cable, and a five-section telescopic arm cable. One end of the three-section telescopic arm cable is connected to the tail of the first section of the telescopic arm, and the other end is folded forward and bypassed by a pulley located at the head of the telescopic drive unit before being connected to the tail of the third section of the telescopic arm. One end of the four-section telescopic arm cable is connected to the tail of the second section of the telescopic arm, and the other end is folded forward and bypassed by a pulley located at the head of the third section of the telescopic arm before being connected to the tail of the fourth section of the telescopic arm. One end of the five-section telescopic arm cable is connected to the tail of the third section of the telescopic arm, and the other end is folded forward and bypassed by a pulley located at the head of the fourth section of the telescopic arm before being connected to the tail of the fifth section of the telescopic arm.

[0008] The telescopic boom cable unit includes a three-section telescopic boom cable and a five-section telescopic boom cable; one end of the three-section telescopic boom cable is connected to the head of the first section of the boom, and the other end is folded back and passed around the pulley at the tail of the second section of the boom before being connected to the tail of the third section of the boom; one end of the five-section telescopic boom cable is connected to the head of the fifth section of the boom, and the other end is folded back and passed around the pulley at the tail of the third section of the boom before being connected to the tail of the third section of the boom.

[0009] Furthermore, the telescopic drive unit employs a telescopic arm cylinder.

[0010] Furthermore, the head of the extension cylinder is provided with a first fixed pulley.

[0011] Furthermore, the head of the three-section arm is provided with a second fixed pulley.

[0012] Furthermore, the head of the four-section arm is provided with a third fixed pulley.

[0013] Furthermore, a fourth fixed pulley is provided at the tail of the two-section arm.

[0014] Furthermore, a fifth fixed pulley is provided at the tail of the three-section arm.

[0015] The present invention also includes a method for operating the above-mentioned crane boom, the method comprising:

[0016] S1, Crane boom extended

[0017] The extension cylinder extends, driving the second section of the boom to extend. The extension cable of the third section of the boom extends through the first fixed pulley fixed to the head of the extension cylinder. The extension cable of the fourth section of the boom extends through the second fixed pulley fixed to the head of the third section of the boom. The extension cable of the fifth section of the boom extends through the third fixed pulley fixed to the head of the fourth section of the boom.

[0018] S2, Crane boom retraction

[0019] The extension boom cylinder retracts, causing the second boom section to retract. The third boom retraction cable retracts via the fourth fixed pulley fixed to the tail of the second boom section. The fifth boom retraction cable retracts via the fifth fixed pulley fixed to the tail of the third boom section. When the fifth boom retracts, the extension boom cable retracts via the third fixed pulley fixed to the head of the fourth boom section, causing the fourth boom section to retract.

[0020] Compared with the prior art, the advantages of the present invention are:

[0021] This invention employs a single-cylinder five-section boom telescopic mechanism, with an optimized internal wire rope winding method to reduce the space ratio of the wire rope within the cylinder, thus saving cylinder cross-section. Based on the traditional single-cylinder five-section boom telescopic mechanism, one four-section boom retraction cable is eliminated and shared with the five-section boom extension cable, saving costs. Furthermore, compared to the traditional telescopic method, the length of the extension cable is reduced, meaning the fixed position of the cable has changed. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the crane boom structure in this invention. Figure One ;

[0023] Figure 2 This is a schematic diagram of the crane boom structure in this invention. Figure Two .

[0024] in:

[0025] 1. One-section boom, 2. Two-section boom, 3. Three-section boom, 4. Four-section boom, 5. Five-section boom, 6. Extending boom cylinder, 7. Five-section boom extending boom cable, 8. Four-section boom extending boom cable, 9. Three-section boom extending boom cable, 10. Five-section boom retracting boom cable, 11. Three-section boom retracting boom cable. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings:

[0027] like Figure 1 and Figure 2 The image shows a crane boom with a single-cylinder five-section telescopic mechanism. The crane boom includes a crane boom unit, a telescopic drive unit, an extension cable unit, and a retraction cable unit.

[0028] The lifting boom unit includes a first boom section 1, a second boom section 2, a third boom section 3, a fourth boom section 4, and a fifth boom section 5 arranged sequentially.

[0029] The extension arm cable unit includes a three-section extension arm cable 9, a four-section extension arm cable 8, and a five-section extension arm cable 7. One end of the three-section extension arm cable 9 is connected to the tail of the first section 1, and the other end is folded forward and bypassed by the first fixed pulley located at the head of the extension arm cylinder before being connected to the tail of the three-section arm 3. One end of the four-section extension arm cable 8 is connected to the tail of the second section 2, and the other end is folded forward and bypassed by the second fixed pulley located at the head of the three-section arm before being connected to the tail of the four-section arm 4. One end of the five-section extension arm cable 7 is connected to the tail of the three-section arm 3, and the other end is folded forward and bypassed by the third fixed pulley located at the head of the four-section arm before being connected to the tail of the five-section arm 5.

[0030] The telescopic boom cable unit includes a three-section telescopic boom cable 11 and a five-section telescopic boom cable 10. One end of the three-section telescopic boom cable 11 is connected to the head of the first section boom 1, and the other end is folded back and passed around the fourth fixed pulley fixed at the tail of the second section boom 2 before being connected to the tail of the third section boom 3. One end of the five-section telescopic boom cable 10 is connected to the head of the fifth section boom 5, and the other end is folded back and passed around the fifth fixed pulley provided at the tail of the third section boom before being connected to the tail of the third section boom 3.

[0031] In the crane boom described in this invention, one end of the five-section boom extension cable is fixed to the tail of the five-section boom, without going around to the head of the five-section boom, thus saving the length of the five-section boom extension cable; one end of the four-section boom extension cable is fixed to the tail of the four-section boom, without going around to the head of the four-section boom, thus saving the length of the four-section boom extension cable; the four-section boom retraction cable shares the five-section boom extension cable, saving two four-section boom retraction cables. Furthermore, based on the above technical features, the five-section telescopic boom uses only one extension cylinder, reducing the weight of the crane boom, saving costs, and improving the crane boom's own lifting capacity.

[0032] Furthermore, the telescopic drive unit employs a telescopic arm cylinder 6.

[0033] Furthermore, the head of the extension cylinder 6 is provided with a first fixed pulley.

[0034] Furthermore, the head of the three-section arm 3 is provided with a second fixed pulley.

[0035] Furthermore, the head of the four-section arm 4 is provided with a third fixed pulley.

[0036] Furthermore, the tail of the two-section arm 2 is provided with a fourth fixed pulley.

[0037] Furthermore, the tail of the three-section arm 3 is provided with a fifth fixed pulley.

[0038] The present invention also includes a method for operating the above-mentioned crane boom, the method comprising:

[0039] S1, Crane boom extended

[0040] like Figure 1 As shown, the extension cylinder 6 extends, driving the second-section boom 2 to extend. The third-section boom extension cable 9 extends the third-section boom 3 via the first fixed pulley fixed to the head of the extension cylinder 6. The fourth-section boom extension cable 8 extends the fourth-section boom 4 via the second fixed pulley fixed to the head of the third-section boom 3. The fifth-section boom extension cable 7 extends the fifth-section boom 5 via the third fixed pulley fixed to the head of the fourth-section boom 4.

[0041] S2, Crane boom retraction

[0042] like Figure 2 As shown, the extension cylinder 6 retracts, causing the second-section boom 2 to retract. The third-section boom retraction cable 11 retracts the third-section boom 3 via the fourth fixed pulley fixed to the tail of the second-section boom 2. The fifth-section boom retraction cable 10 retracts the fifth-section boom 5 via the fifth fixed pulley fixed to the tail of the third-section boom 3. When the fifth-section boom 5 retracts, the fifth-section boom extension cable 7 retracts the fourth-section boom via the third fixed pulley fixed to the head of the fourth-section boom 4.

[0043] In summary, this invention employs a single-cylinder five-section boom telescopic mechanism, with optimized internal wire rope winding method to reduce the space ratio of the wire rope within the cylinder, thus saving cylinder cross-section. Based on the traditional single-cylinder five-section boom telescopic mechanism, one four-section boom retraction cable is eliminated and shared with the five-section boom extension cable, saving costs. Furthermore, compared to the traditional telescopic method, the length of the extension cable is reduced, meaning the fixed position of the cable has changed.

[0044] The above-described embodiments are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A lifting boom with a single-cylinder five-section telescopic mechanism, characterized in that, The crane boom includes a crane boom unit, a telescopic drive unit, an extension cable unit, and a retractable cable unit; The lifting boom unit includes a first boom section, a second boom section, a third boom section, a fourth boom section, and a fifth boom section arranged sequentially. The telescopic arm cable unit includes a three-section telescopic arm cable, a four-section telescopic arm cable, and a five-section telescopic arm cable. One end of the three-section telescopic arm cable is connected to the tail of the first section of the telescopic arm, and the other end is folded forward and bypassed by a pulley located at the head of the telescopic drive unit before being connected to the tail of the third section of the telescopic arm. One end of the four-section telescopic arm cable is connected to the tail of the second section of the telescopic arm, and the other end is folded forward and bypassed by a pulley located at the head of the third section of the telescopic arm before being connected to the tail of the fourth section of the telescopic arm. One end of the five-section telescopic arm cable is connected to the tail of the third section of the telescopic arm, and the other end is folded forward and bypassed by a pulley located at the head of the fourth section of the telescopic arm before being connected to the tail of the fifth section of the telescopic arm. The telescopic boom cable unit includes a three-section telescopic boom cable and a five-section telescopic boom cable; one end of the three-section telescopic boom cable is connected to the head of the first section of the boom, and the other end is folded back and passed around the pulley at the tail of the second section of the boom before being connected to the tail of the third section of the boom; one end of the five-section telescopic boom cable is connected to the head of the fifth section of the boom, and the other end is folded back and passed around the pulley at the tail of the third section of the boom before being connected to the tail of the third section of the boom.

2. The lifting boom according to claim 1, characterized in that, The telescopic drive unit is a telescopic arm cylinder.

3. The lifting boom according to claim 2, characterized in that, The head of the extension cylinder is equipped with a first fixed pulley.

4. The lifting boom according to claim 2, characterized in that, The head of the three-section arm is equipped with a second fixed pulley.

5. The lifting boom according to claim 2, characterized in that, The head of the four-section arm is equipped with a third fixed pulley.

6. The lifting boom according to claim 2, characterized in that, The tail of the two-section arm is equipped with a fourth fixed pulley.

7. The lifting boom according to claim 2, characterized in that, The tail of the three-section arm is equipped with a fifth fixed pulley.

8. The method for operating a crane boom according to any one of claims 2 to 7, characterized in that, The method includes: S1, Crane boom extended The extension cylinder extends, driving the second section of the boom to extend. The extension cable of the third section of the boom extends through the first fixed pulley fixed to the head of the extension cylinder. The extension cable of the fourth section of the boom extends through the second fixed pulley fixed to the head of the third section of the boom. The extension cable of the fifth section of the boom extends through the third fixed pulley fixed to the head of the fourth section of the boom. S2, Crane boom retraction The extension boom cylinder retracts, causing the second boom section to retract. The third boom retraction cable retracts via the fourth fixed pulley fixed to the tail of the second boom section. The fifth boom retraction cable retracts via the fifth fixed pulley fixed to the tail of the third boom section. When the fifth boom retracts, the extension boom cable retracts via the third fixed pulley fixed to the head of the fourth boom section, causing the fourth boom section to retract.

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