Z-shaped Foldable Crane Telescopic Arm Extension
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Solution Overview
Problem
Generic cranes have limited range due to the articulation connection blocking the passage of the telescopic arm, restricting its extension beyond the articulated connection with the lifting arm.
Innovation Solution
The telescopic arm is extended by arranging a fork-shaped receiving section on the lifting arm, allowing it to reach the articulated connection and beyond, with the articulated arm's shaped tube designed to accommodate the telescopic arm's passage, using alternative pivot bearing configurations to facilitate this extension.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the articulated connection is arranged in the region of the second end of the articulated arm, then the structural integrity of the articulated arm is maintained, but the telescopic arm cannot pass through the shaped tube beyond the articulated connection
Solution Approach 1:
Instead of arranging the articulated connection at the end of the articulated arm (conventional approach), the invention inverts the arrangement by placing the articulated connection on the lifting arm while extending the shaped tube through the entire articulated arm. This allows the telescopic arm to pass through the shaped tube beyond the articulated connection, achieving greater extension length without compromising structural integrity.
2Area of stationary object
If the fork-shaped receiving section is arranged on the articulated arm, then the telescopic arm can be supported, but the receiving area for the telescopic arm is limited
Solution Approach 1:
The invention transitions the fork-shaped receiving section from the articulated arm to the lifting arm, utilizing a different spatial dimension. This dimensional change allows the receiving section to span the entire length of the articulated arm through the extended shaped tube, significantly increasing the receiving area while maintaining ease of operation for the telescopic arm.
3Length of moving object
If the shaped tube is blocked by the articulated connection, then the articulated connection provides structural support, but the telescopic arm passage is restricted
Solution Approach 1:
The invention segments the structural support function by separating the articulated connection from the shaped tube passage. The shaped tube is extended through the entire articulated arm to provide continuous support, while the articulated connection is repositioned on the lifting arm. This segmentation allows both the telescopic arm passage and structural support to coexist without interference, maximizing the telescopic arm reach while maintaining strength.
Data Source
Figure 1
Figure 2a
Figure 2b~2c
AI summary
Z-shaped collapsible crane, comprising: - a crane column (9); - a lifting arm (3) which is articulated at one end to the crane column (9) and has a fork-shaped receiving section for a knuckle arm (1) at the other end; - a knuckle arm (1), wherein the knuckle arm (1) is designed as a profile tube and has a first end and a second end; - a joint connection (8) which articulates the knuckle arm (1) to the lifting arm (3), wherein the joint connection (8) is arranged in the region of the second end of the knuckle arm (1); - a telescopic arm (2) mounted in the knuckle arm (1), which can be extended from a retracted state in the knuckle arm (1) from the first end of the knuckle arm (1), wherein - the joint connection (8) is arranged outside the profile tube of the knuckle arm (1).so that the telescopic arm (2) can pass the joint connection (8) and - the telescopic arm (2) extends in the retracted state in a direction away from the first end of the articulated arm (2) beyond the joint connection (8) with the lifting arm (3).