Balancing Weight with Trapezoidal Recess for Combing Machine Shaft
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Solution Overview
Problem
Existing balancing weights for combing machines experience dynamic shifts and wear due to high acceleration forces, leading to loosening of connections and adverse effects on product quality, as they are not securely attached to the round comb shaft.
Innovation Solution
A balancing weight with a longitudinal and transverse length, featuring a trapezoidal recess and inclined surfaces that provide defined contact points and increased normal force, allowing for a secure and non-slip connection to the round comb shaft, even under high acceleration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the counterweight is attached to the circular comb shaft using conventional connections, then the counterweight can be secured to the shaft, but under high acceleration forces the connection experiences dynamic displacement and torsional twisting leading to wear and loosening
Solution Approach 1:
The counterweight is designed with a curved outer contour that matches the cylindrical surface of the comb shaft, creating a conformal contact interface. This curved geometry distributes contact forces more evenly and prevents point loading, thereby reducing wear and maintaining connection stability under high acceleration forces.
Solution Approach 2:
The counterweight features localized contact surfaces with specific geometric properties (curved contour matching the shaft diameter) at the interface with the comb shaft. This local geometric optimization ensures optimal contact and force distribution precisely where the connection is most susceptible to wear and displacement.
2Stability of the object's composition
If the counterweight is positioned at a large distance from the axis of the circular comb shaft to balance the comb segment, then the balancing effect is improved, but the mass moment of inertia increases due to the large distance
Solution Approach 1:
The counterweight is strategically positioned on the opposite side of the comb shaft from the comb segment to create a balancing moment. By optimizing the counterweight's mass and radial position, the design achieves effective counterbalancing of the comb segment's weight while minimizing the counterweight's distance from the shaft axis, thus reducing the mass moment of inertia.
Solution Approach 2:
The design optimizes the counterweight's geometric parameters (mass, radial distance, angular position) to achieve the desired balancing effect. By carefully selecting these parameters, the system achieves adequate counterbalancing while minimizing the mass moment of inertia, allowing for faster acceleration and deceleration of the circular comb.
3Adaptability or versatility
If the circular comb is driven with discontinuous rotary motion to adapt to the combing process, then the adaptability to the combing process is improved, but high acceleration forces are generated due to the superposition of base speed with sinusoidal rising and falling speed
Solution Approach 1:
The counterweight is designed to dynamically counterbalance the varying forces generated during discontinuous rotary motion. The counterweight's position and mass are optimized to provide a counteracting moment that compensates for the high acceleration forces, allowing the system to achieve the desired discontinuous motion profile while minimizing the impact of these forces on the overall system stability.
4Reliability
If the counterweight is secured to the circular comb shaft, then the connection provides support, but bending loads arise on the clamping screws leading to fatigue
Solution Approach 1:
The curved outer contour of the counterweight creates a conformal contact interface with the cylindrical comb shaft, distributing contact forces evenly across the interface. This eliminates concentrated bending loads on the clamping screws by providing a continuous support surface, thereby preventing fatigue failure of the fastening elements.
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 solution ensures a displacement-free connection between the balancing weight and the round comb shaft, reducing wear and maintaining product quality by enhancing torsional rigidity and force transmission.
Implementation Method 1
providing defined contact points and increased normal force, allowing for a secure and non-slip connection to the round comb shaft
Implementation Method 2
enhancing torsional rigidity and force transmission
Data Source
Figure 1
Figure 2~3
Figure 4~5
AI summary
The present invention relates to a counterweight (10) for a combing device of a combing machine and to a combing device. The counterweight (10) has a length (23) in a longitudinal direction (24) and a transverse direction (25) and is provided with at least two through-openings (26) in the transverse direction (25) for mounting on a surface (27) of a round comb shaft (7) with a round comb shaft diameter (28) and at least two through-bores (29) in the transverse direction (25) for clamping with a round comb (7). The counterweight (10) is designed in the form of an annular arc segment with a segment angle (α) of 70 to 110 degrees for bearing against the surface (27) of the round comb shaft (7).In the longitudinal direction (24) a trapezoidal depression (30) with a base surface (31) is provided over the entire length (23) on one side of the counterweight (10) facing the round comb shaft (7), wherein the through openings (26) and the through bores (28) open into the base surface (31) and the depression (30) is bounded by inclined surfaces (32) arranged on both sides in the longitudinal direction (24), which enclose an opening angle (β) of 45 to 75 degrees.