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CN-121974261-A - Arm support and crane

CN121974261ACN 121974261 ACN121974261 ACN 121974261ACN-121974261-A

Abstract

The application relates to the technical field of cranes, and discloses a boom and a crane. The arm support comprises a main arm, an auxiliary arm, a fixed support, a connecting rod assembly and a first pin assembly, wherein a rotating part is arranged at one end of the auxiliary arm, the fixed support is fixedly connected with the main arm, a first connecting part is arranged on the fixed support, the connecting rod assembly is at least partially detachably connected with the fixed support and is hinged with the auxiliary arm, the connecting rod assembly is configured to drive the auxiliary arm to rotate relative to the main arm, the first pin assembly comprises a first pin shaft, and the first pin shaft penetrates through the rotating part and the first connecting part to enable the auxiliary arm to be rotatably connected with the main arm. The arm support provided by the application is beneficial to saving the labor cost of the installation of the auxiliary arm and improving the installation efficiency.

Inventors

  • ZHOU BIN
  • XIANG YUGUANG
  • XIAO YIYONG

Assignees

  • 三一汽车起重机械有限公司

Dates

Publication Date
20260505
Application Date
20260318

Claims (11)

  1. 1. A boom for a crane, comprising: A main arm (400); a sub-arm (500), wherein a rotation part is arranged at one end of the sub-arm (500); The fixed support (100) is fixedly connected with the main arm (400), and a first connecting part (110) is arranged on the fixed support (100); -a linkage assembly (200), the linkage assembly (200) being at least partially detachably connected to the fixed support (100) and the linkage assembly (200) being at least partially intended to be articulated with a secondary arm (500) of the crane, the linkage assembly (200) being configured to drive the secondary arm (500) in rotation with respect to the primary arm (400); A first latch assembly (300) including a first pin (310), the first pin (310) configured to pass through the rotating portion and the first connecting portion (110) to rotatably connect the sub-arm (500) with the main arm (400).
  2. 2. The boom of claim 1, wherein the linkage assembly (200) comprises a telescoping rod (210), a linkage (220), a driven rod (230), and a fixed rod (240), the fixed mount (100) further comprising a second connection (120); the first end of the telescopic rod (210) is hinged with the auxiliary arm (500), the second end of the telescopic rod (210) is hinged with the first end of the connecting rod (220) and the first end of the driven rod (230), and the second end of the connecting rod (220) is hinged with the auxiliary arm (500); A connecting hole is formed in the first end of the fixed rod (240), the first pin shaft (310) penetrates through the connecting hole, and a second pin shaft (241) is arranged at the second end of the fixed rod (240); the first pin shaft (310) is configured to drive the fixed rod (240) to drive the second pin shaft (241) to pass through the second end of the driven rod (230) and the second connecting portion (120), so that the second end of the driven rod (230) is hinged with the second connecting portion (120).
  3. 3. The boom according to claim 2, characterized in that the second end of the telescopic rod (210) is provided with a first connection seat (211), the first connection seat (211) comprising two first ear seats (2111) arranged symmetrically; The first end of the connecting rod (220) and the first end of the driven rod (230) are arranged between the two first ear seats (2111) and hinged with the first ear seats (2111).
  4. 4. The boom according to claim 2, characterized in that the second end of the driven rod (230) is provided with a second connection seat (231), the second connection seat (231) comprising a second ear seat (2311) and a third ear seat (2312) arranged symmetrically; The second connecting part (120) is arranged between the second ear seat (2311) and the third ear seat (2312); the second pin shaft (241) sequentially penetrates through the second ear seat (2311), the second connecting portion (120) and the third ear seat (2312), so that the second connecting seat (231) is hinged with the second connecting portion (120).
  5. 5. The boom of claim 2, wherein the first latch assembly (300) further comprises a first stop (330) and a second stop (340); The first limiting piece (330) and the second limiting piece (340) are arranged on the first pin shaft (310) at intervals, and the first end of the fixing rod (240) is located between the first limiting piece (330) and the second limiting piece (340) so that the fixing rod (240) and the first pin shaft (310) can move synchronously.
  6. 6. Boom according to claim 2, characterized in that the telescopic rod (210) is formed as one of a hydraulic cylinder and an electric cylinder.
  7. 7. The boom of any of claims 1-6, wherein said first latch assembly (300) further comprises a first driver (320); the first driving piece (320) is arranged on the auxiliary arm (500) and is connected with the first pin shaft (310); the first driving member (320) is configured to drive the first pin (310) to move in an axial direction thereof so that the first pin (310) passes through the first connection portion (110) or is separated from the first connection portion (110).
  8. 8. The boom according to claim 7, characterized in that the turning part comprises a third connection seat (510), the third connection seat (510) comprising a fourth ear seat (511) and a fifth ear seat (512) arranged symmetrically; The first connecting part (110) is arranged between the fourth ear seat (511) and the fifth ear seat (512); The first driving piece (320) is configured to drive the first pin shaft (310) to sequentially pass through the fourth ear seat (511), the first connecting portion (110) and the fifth ear seat (512), so that the auxiliary arm (500) is hinged with the fixed support (100).
  9. 9. The boom according to claim 8, characterized in that the number of first connecting portions (110) is two, and the two first connecting portions (110) are arranged at intervals along the axial direction of the first pin shaft (310); The number of the third connecting seats (510) is two corresponding to the first connecting portions (110); the first pin shaft (310) is arranged between the fourth ear seats (511) of the two third connecting seats (510), and the first pin shaft (310) comprises a first shaft section (311) and a second shaft section (312); The first driving member (320) is located between the first shaft section (311) and the second shaft section (312), and the first driving member (320) is configured to drive the first shaft section (311) and the second shaft section (312) to move back to each other, so that the first shaft section (311) and the second shaft section (312) respectively pass through the two third connecting seats (510).
  10. 10. The boom of any of claims 1-6, further comprising a second latch assembly comprising a third pin and a second driver; the fixed support (100) further comprises a third connecting part (130) symmetrically arranged with the first connecting part (110); the rotating part further comprises a fourth connecting seat (520), and the fourth connecting seat (520) comprises a sixth ear seat and a seventh ear seat which are symmetrically arranged; The third connecting part (130) is arranged between the sixth ear seat and the seventh ear seat; The second driving piece is arranged on the auxiliary arm (500), and is configured to drive the third pin shaft to sequentially pass through the sixth ear seat, the third connecting portion (130) and the seventh ear seat so as to lock the auxiliary arm (500) and the main arm (400).
  11. 11. Crane, characterized by comprising a boom according to any of claims 1-10.

Description

Arm support and crane Technical Field The invention relates to the technical field of cranes, in particular to a boom and a crane. Background Wheeled cranes typically employ boom structures in which a main boom is combined with an auxiliary boom. The auxiliary arm is detachably mounted on one side of the main arm through the fixing support, and when the length of the main arm cannot meet actual requirements in actual operation, the auxiliary arm is required to be transferred to the top end of the main arm through the fixing support to be assembled, so that the length of the arm support structure is prolonged. In the prior art, the installation process of the auxiliary arm mainly depends on manual operation, namely, a pin shaft is firstly required to be inserted into a connecting hole at the top end of the auxiliary arm and the top end of the main arm to realize hinging and positioning, then the auxiliary arm is overturned and unfolded around the pin shaft to be positioned on the same line with the main arm by manual traction, and finally, a locking pin is inserted into a corresponding pin hole to finish fixation. However, the above-mentioned installation method requires cooperation of a plurality of workers, and has high labor cost and low installation efficiency. Disclosure of Invention The invention provides a boom and a crane, which are used for solving the problems of higher labor cost and lower installation efficiency in the prior art for installing an auxiliary boom. The invention provides a boom for a crane, which comprises a main arm, an auxiliary arm, a fixed support, a connecting rod assembly and a first bolt assembly, wherein one end of the auxiliary arm is provided with a rotating part, the fixed support is used for being fixedly connected with the main arm of the crane, a first connecting part is arranged on the fixed support, the connecting rod assembly is at least partially detachably connected with the fixed support and is at least partially used for being hinged with the auxiliary arm of the crane, the connecting rod assembly is configured to drive the auxiliary arm to rotate relative to the main arm, and the first bolt assembly comprises a first pin shaft, and the first pin shaft penetrates through the rotating part and the first connecting part to enable the auxiliary arm to be in rotating connection with the main arm. According to the technical means, the fixed support provides a connecting point for the auxiliary arm, when the auxiliary arm is required to be installed, the first pin shaft firstly penetrates through the rotating part and the first connecting part, so that the hinge positioning of the auxiliary arm and the main arm is realized, and then the connecting rod assembly drives the auxiliary arm to rotate for a preset angle relative to the main arm, so that the installation of the auxiliary arm is realized. Therefore, the arm support can realize automatic positioning and rotation of the auxiliary arm, further realize automatic installation, be favorable for saving the labor cost of the installation of the auxiliary arm and improve the installation efficiency of the auxiliary arm. In an alternative embodiment, the connecting rod assembly comprises a telescopic rod, a connecting rod, a driven rod and a fixed rod, the fixed support further comprises a second connecting portion, the first end of the telescopic rod is hinged to the auxiliary arm, the second end of the telescopic rod is hinged to the first end of the connecting rod and the first end of the driven rod, the second end of the connecting rod is hinged to the auxiliary arm, a connecting hole is formed in the first end of the fixed rod, a first pin shaft penetrates through the connecting hole, a second pin shaft is arranged at the second end of the fixed rod, and the first pin shaft is configured to drive the fixed rod to drive the second pin shaft to penetrate through the second end of the driven rod and the second connecting portion, so that the second end of the driven rod is hinged to the second connecting portion. Thus, the first end of the fixing rod is fixed relative to the first connecting part of the fixing support through the first pin shaft, and the second end of the fixing rod is fixed relative to the second connecting part of the fixing support through the second pin shaft, so that the fixing of the two ends of the fixing rod is realized, namely, when the connecting rod assembly operates, the fixing rod is kept motionless relative to the fixing support. The telescopic rod stretches out and draws back for the second end of telescopic rod produces the displacement with the pin joint of connecting rod and driven lever, thereby pulls the auxiliary arm and turns over the expansion automatically around the axis of first round pin axle. Therefore, the manual traction unfolding mode is converted into mechanical automation operation, the manpower requirement for installing the auxiliary arm is reduced, and the installat