Screw Connection with Deformed Section for Transverse Force Absorption
Solution Overview
Problem
Existing screw connections between vehicle body and chassis components require large screws to absorb high transverse forces, leading to increased space and weight, as well as complex assembly processes.
Innovation Solution
A form-fit connection is achieved through a deformed section of the chassis component that forms an annular projection between the screw head and the connecting section, allowing for reduced screw size and weight by distributing radial holding forces, enabling the use of lighter and smaller screws.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If large screw dimensions and high screw tightening forces are used to absorb high transverse forces, then the transverse force absorption capability is improved, but the space required and weight of the assembly increase
Solution Approach 1:
The connection function is segmented between the screw (providing axial clamping force) and the deformed section (providing radial form fit). This division allows each component to be optimized for its specific function, enabling the use of smaller screws while maintaining overall connection strength.
Solution Approach 2:
The deformed section is formed with a curved outer contour that creates an annular projection between the screw head and connecting section. This curved geometry provides optimal contact surfaces for frictional force transmission, enabling effective transverse force absorption with reduced screw dimensions.
2Strength
If large screw dimensions and high screw tightening forces are used to absorb high transverse forces, then the transverse force absorption capability is improved, but the installation space required increases
Solution Approach 1:
The connection function is segmented between the screw (providing axial clamping force) and the deformed section (providing radial form fit). This division allows each component to be optimized for its specific function, enabling the use of smaller screws while maintaining overall connection strength.
Solution Approach 2:
The solution transitions from relying solely on axial screw force to utilizing radial form fit forces. The deformed section creates radial contact forces through its curved geometry, adding a dimensional component to force transmission that reduces the required screw size and installation space.
3Strength
If large screw dimensions and high screw tightening forces are used to absorb high transverse forces, then the transverse force absorption capability is improved, but the assembly process becomes more difficult
Solution Approach 1:
The deformed section is pre-formed with a curved outer contour that will create the annular projection during assembly. This preliminary shaping enables the form fit connection to be established automatically during the screw tightening process, simplifying the assembly operation.
Solution Approach 2:
The deformed section automatically generates the radial form fit forces through its curved geometry when compressed between the screw head and connecting section. This self-generating mechanism eliminates the need for complex assembly procedures or additional components, making the assembly process simpler.
4Weight of stationary object
If the axial contact pressure from the screw is reduced through the form fit connection, then the screw size and weight are reduced, but the transverse force absorption must be maintained
Solution Approach 1:
The force transmission function is segmented between axial screw pressure and radial form fit forces. The deformed section's curved geometry creates radial contact forces that directly resist transverse loads, allowing the screw to be smaller while maintaining overall strength.
Solution Approach 2:
The curved outer contour of the deformed section creates an annular projection that provides optimal contact surfaces for frictional force transmission. This curved geometry efficiently converts the reduced axial screw pressure into sufficient radial holding forces to maintain transverse force absorption 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 solution reduces assembly complexity and space requirements while maintaining high transverse force absorption capabilities, ensuring a play-free, precise connection that withstands significant loads.
Implementation Method 1
The deformed section is preferably deformed plastically, so that the annular projection once formed on the second component to be connected is retained
Implementation Method 2
a significant increase in the frictional forces between the components
Data Source
Figure 1
Figure 2
AI summary
The invention relates to an assembly for connecting at least two components (12, 14) using a screw connection, said assembly comprising: a screw (16) having a screw shaft (22) and a screw head (18) having an outer contour (20) tapering in the direction of the screw shaft (22); a first component (12) to be connected having a connecting section (24) with a recess (30) in the region of the screw head (18), said recess becoming a screw shaft receptacle (28); and a second component (14) to be connected having an opening (34) for the passage of the screw shaft (22), and a deformation section (36) surrounding said opening (34). When the screw (16) is tightened, the deformation section (36) is pushed into the recess (30) by the screw head (18) and forms a ring projection (38) protruding into the recess (30), thereby forming a lateral interlocking connection between the components (12, 14). The assembly is particularly suitable for connecting a vehicle body to a chassis.