Telescopic Lifting Device Roller Guide and Pressure Adjustment
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Solution Overview
Problem
Conventional telescopic lifting devices suffer from abrasion and damage due to roller contact, require frequent replacement of wearing parts, and lack adjustable contact pressure, leading to maintenance challenges and potential movement issues.
Innovation Solution
The telescopic lifting device features an outer and inner tube with grooves for guide rails, adjustable roller contact pressure, and a braking system, along with a piston for axial movement, allowing for pneumatically, hydraulically, or electrically operated operation, and includes an electronic measuring device for position detection and a safety mechanism to prevent overextension.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If rollers are used to guide the inner tube axially relative to the outer tube, then the telescopic movement is enabled, but abrasion occurs on the lateral surfaces causing damage and requiring frequent replacement
Solution Approach 1:
The patent introduces guide rails as an intermediary element between the rollers and the tube surfaces. The rollers roll on the guide rails instead of directly on the lateral surfaces of the tubes, thereby mediating the contact and preventing direct abrasion between the rollers and tube surfaces. This resolves the contradiction by enabling telescopic movement through roller rotation while protecting the tube surfaces from wear damage.
2Device complexity
If the contact pressure of rollers is fixed, then the structure is simple, but dimensional deviations cannot be compensated leading to increased rolling resistance and potential blocking
Solution Approach 1:
The patent makes the contact pressure of the rollers adjustable rather than fixed. The guide device allows the contact pressure to be adapted according to actual operating conditions, enabling compensation for dimensional deviations in the tubes and rollers. This dynamic adjustment capability ensures smooth telescopic movement by optimizing rolling conditions, resolving the contradiction between structural simplicity and movement smoothness.
3Device complexity
If rollers are mounted to rotate on fixed axes, then the guide structure is simple, but wear cannot be compensated and movement may be blocked
Solution Approach 1:
The patent transforms the fixed-axis roller mounting into a dynamic system where the roller axes can adjust their positions. This allows the rollers to adapt to wear and dimensional variations by shifting their contact points on the guide rails. The guide structure remains relatively simple while gaining the adaptability to compensate for wear, resolving the contradiction between structural simplicity and wear compensation capability.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This design reduces maintenance costs, simplifies the replacement of wearing parts, minimizes damage, and ensures smooth operation by adjusting contact pressure and incorporating a braking system, thereby enhancing the reliability and efficiency of the telescopic lifting device.
Implementation Method 1
The piston can be operated pneumatically, hydraulically or electrically
Implementation Method 2
The piston can be operated pneumatically, hydraulically or electrically
Implementation Method 3
The guide device has rollers which are mounted displaceably along their axes of rotation in order to guide the inner tube in the axial direction relative to the outer tube through the guide device
Implementation Method 4
the rolling of the rollers of one pipe on the lateral surface of the respective other pipe causes abrasion on the lateral surfaces
Implementation Method 5
The guide device is connected to the outer tube at the free end of the telescopic lifting device and also has rollers which are mounted displaceably along their axes of rotation in order to guide the inner tube in the axial direction relative to the outer tube through the guide device
Data Source
Figure 1~2
Figure 3~4
Figure 5
AI summary
A telescopic lifting device (10) for the linear guidance of loads, and a telescopic lifting system consisting of several telescopic lifting devices (10) comprising: an outer tube (20), an inner tube (30), a piston (40), and a guide device (50). The force required to move the load, which is connected to the free end of the inner tube (30) of the telescopic lifting device (10), is transmitted to the inner tube (30) either pneumatically, hydraulically, or electrically via a piston rod (41) and a piston head (42) of the piston (40). The inner end of the inner tube (30) is supported against the outer tube (20) by rollers (31). The guide device (50) is connected to the outer tube (20) at the free end of the telescopic lifting device (10). Here too, the inner tube (30) is supported relative to the outer tube (20) by rollers (51) located in the guide device (50).The linear guidance of the load is made possible by the relative movement of the inner tube (30) to the outer tube (20) in the axial direction.