Split Housing Doffer Gripper for Quick Membrane Replacement
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Solution Overview
Problem
Existing grippers for bobbin or bobbin tube handling in spinning machines require complex and costly replacement of worn-out membranes, leading to prolonged downtimes and unnecessary wear on retaining tabs due to the need to remove the entire gripper from the doffer beam for membrane exchange.
Innovation Solution
The gripper design separates the holding element from the fastening element via a securing element, allowing the holding element with the clamping membrane to be removed and replaced without detaching from the doffer beam, thus minimizing downtime and preventing unnecessary wear on retaining tabs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of repair
If the entire gripper is removed from the doffer beam to replace the clamping membrane, then the membrane can be replaced, but machine downtime increases and retaining tabs experience unnecessary wear
Solution Approach 1:
The gripper is divided into separate components: the holding element containing the membrane, and the fastening element with retaining tabs. The securing element connects these parts. This segmentation allows the holding element with the membrane to be replaced independently without removing the entire gripper from the doffer beam, thus reducing machine downtime and preventing wear on the retaining tabs.
2Ease of repair
If the entire gripper is removed from the doffer beam to replace the clamping membrane, then the membrane can be replaced, but unnecessary wear occurs on the retaining tabs
Solution Approach 1:
The gripper is divided into separate components: the holding element containing the membrane, and the fastening element with retaining tabs. The securing element connects these parts. This segmentation allows the holding element with the membrane to be replaced independently without removing the entire gripper from the doffer beam, thus reducing machine downtime and preventing wear on the retaining tabs.
3Stability of the object's composition
If the holding element is permanently fixed to the fastening element, then structural stability is improved, but membrane replacement becomes complex and time-consuming
Solution Approach 1:
The gripper is divided into separate components: the holding element containing the membrane, and the fastening element with retaining tabs. The securing element connects these parts. This segmentation allows the holding element with the membrane to be replaced independently without removing the entire gripper from the doffer beam, thus reducing machine downtime and preventing wear on the retaining tabs.
Solution Approach 2:
The connection between the holding element and fastening element is made dynamic through the securing element with snap connections. This allows the connection to be stable during operation but easily separable when membrane replacement is needed, providing both structural stability and ease of maintenance.
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 enables quick and efficient replacement of the clamping membrane without removing the gripper from the doffer beam, reducing machine downtime and ensuring a consistent clamping effect while preventing unnecessary wear on retaining tabs.
Implementation Method 1
a clamping element in the form of a rubber membrane, which can be adjusted via a pneumatic device
Implementation Method 2
grasp the end region of the coil or coil sleeve inserted into the interior of the holding element from the outside
Implementation Method 3
Two elastic retaining tabs are arranged on the fastening element
Implementation Method 4
The holding or clamping effect of the holding tabs is increased or supported by a steel spring embedded below the holding tabs in the fastening element
Data Source
Figure 1~2
Figure 3
Figure 4
AI summary
The invention relates to a gripper (1) for gripping a bobbin or bobbin sleeve (3), said gripper (1) comprising a fastening element (11) and a cylindrical holding element (2) that has a longitudinal axis (10); the holding element (2) has an inner wall (4) and an outer wall (20); a pneumatically operated clamping element (5) to which compressed air can be supplied via an air duct (12) is arranged on the inner wall (4). In order to simplify the design of the gripper (1), the holding element (2) is retained on the fastening element (11) by a securing element (19) that surrounds part of the outer wall (20) of the holding element (2).