Sash lifter self-adjusting bearing axis for window alignment
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Solution Overview
Problem
Existing sash lifters require manual adjustment for precise positioning, which is time-consuming and often omitted, leading to ineffective operation over time as the bearings sag, especially with heavy window and door sashes.
Innovation Solution
A sash lifter with a bearing axis that can be displaced relative to the base body, utilizing a one-way clutch and conversion device to adjust the contact section height automatically during normal use, eliminating the need for manual adjustment by pivoting the support lever, ensuring correct positioning without user intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual adjustment is performed to precisely position the base body and support element, then the sash lifter functions correctly, but the installation process becomes time-consuming and troublesome
Solution Approach 1:
The sash lifter automatically adjusts itself during normal operation. When the window is closed and the sash runs into the frame, the support element hits the contact section of the support lever, causing the bearing axis to displace and adjust the height of the contact section. This self-adjusting mechanism eliminates the need for manual adjustment while ensuring correct functionality.
Solution Approach 2:
The mounting positions of the base body and support element are pre-configured to be slightly misaligned, with the contact section positioned slightly too far away from the support element. This preliminary misalignment is intentionally designed to trigger the automatic adjustment mechanism during the first few closing operations, ensuring proper positioning without requiring manual intervention.
2Productivity
If manual adjustment is omitted to save time, then installation is faster, but the sash lifter becomes ineffective
Solution Approach 1:
The device performs its own adjustment automatically during normal use. The conversion device with one-way clutch mechanism ensures that the bearing axis displaces in the adjustment direction when the support lever pivots in, but prevents reverse displacement when pivoted out. This self-adjusting feature guarantees that the sash lifter becomes effective even if initial manual adjustment is completely omitted.
3Manufacturing precision
If the contact section is positioned too close to the support element initially, then adjustment is not needed, but the support element may strike the support lever between the contact section and base body
Solution Approach 1:
The base body and support element are deliberately mounted with a small intentional gap, positioning the contact section slightly too far away from the support element. This preliminary under-positioning triggers the automatic adjustment mechanism during normal operation, ensuring the contact section reaches the correct position without causing harmful striking, while the one-way clutch prevents over-adjustment.
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
The sash lifter self-adjusts during use, ensuring proper operation and relieving the installer of tedious adjustment tasks, guaranteeing functionality even if initial adjustment is not made, and preventing the support element from striking the support lever.
Implementation Method 1
The conversion device comprises a one-way clutch acting between the support lever and a transmission element that acts on the bearing axis in a shifting manner. The one-way clutch ensures that pivoting of the support lever in only one direction, namely in the direction of the pivoted-in position, is associated with a displacement movement of the bearing axis.
Implementation Method 2
The bearing axis can include a sliding guide section, which is guided in a guide link of the base body that extends in the direction of adjustment.
Implementation Method 3
Means are preferably provided for disengaging the one-way clutch to prevent further displacement of the bearing axle after it has reached the desired correct position.
Implementation Method 4
a support lever mounted on the base body, which can be pivoted relative to the base body between a pivoted-out position and a pivoted-in position
Data Source
Figure 1
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Figure 5
AI summary
The invention relates to a sash/leaf lift (17, 17') for a window or a door comprising a main body (19) and a supporting lever (21) supported on the main body, which supporting lever can be pivoted between a swung-out position and a swung-in position and interacts with a supporting element (25) by means of a contact segment (23) in such a way that the supporting element (25) hits the contact segment (23) of the swung-out supporting lever (21) as the sash/leaf hits the frame, whereby the supporting lever (21) is swung into the swung-in position and is supported on the supporting element (25) in the swung-in position, the sash/leaf being raised. A bearing shaft (27) supporting the supporting lever (21) can be displaced in relation to the main body (19) in order to change the height position of the contact segment (23), wherein a transfer device (60, 60') is provided, which effects a displacement of the bearing shaft (27) in an adjustment direction when the supporting lever (21) is swung in the direction of the swung-in position but prevents a displacement of the bearing shaft (27) against the adjustment direction when the supporting lever (21) is swung in the direction of the swung-out position.