Two-Piece Threaded Nut With Pressure Screws for High Clamping Force
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional nuts require full thread engagement for loosening, which can be cumbersome and inefficient, especially when dealing with large threads or complex connections.
Innovation Solution
A two-piece nut design with internal threads and pressure screws arranged around the internal thread, allowing for partial thread engagement and easy assembly/disassembly, using pressure screws to generate high pressing forces with lower tightening torque.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional nuts are used with full thread engagement, then secure connection is achieved, but loosening and assembly become cumbersome and inefficient
Solution Approach 1:
The nut is divided into two separate parts: a first nut part with an internal thread and a second nut part that can be radially displaced. This segmentation allows the second part to be moved away from the first part for easy loosening, while still providing secure connection when engaged. The dividing plane separates the internal thread into two sections, enabling independent movement of each part.
Solution Approach 2:
The second nut part is designed with dynamic movement capability, allowing it to be radially displaced away from the first nut part and then returned to its engaged position. This dynamic feature enables easy loosening by simply moving the second part radially outward, while maintaining structural integrity when engaged. The guide surfaces facilitate this dynamic movement.
2Force
If pressure screws are added to generate high pressing forces, then clamping force is improved, but device complexity increases
Solution Approach 1:
The pressure screw mechanism is integrated into the existing two-part nut structure. The first and second nut parts are combined with pressure screw threads that allow a pressure screw to be inserted, merging the clamping function with the structural framework. This eliminates the need for separate clamping mechanisms while achieving high pressing forces.
Solution Approach 2:
The pressure screw system allows the nut to self-generate high clamping forces through the interaction between the first and second nut parts. When the pressure screw is tightened, it forces the two nut parts together, creating high pressing forces automatically without requiring external actuators or complex mechanisms. The structure serves its own clamping function.
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
Enables efficient and secure screw connections with reduced torque requirements, facilitating easy handling and assembly of large or complex threaded components.
Implementation Method 1
pressure screws arranged around the internal thread, allowing for partial thread engagement and easy assembly/disassembly, using pressure screws to generate high pressing forces with lower tightening torque
Implementation Method 2
radial displacement of the nut parts away from the operating position and from the external thread is blocked
Data Source
Figure 1
Figure 2
Figure 3
AI summary
The invention relates to a threaded nut with an internal thread and two nut parts (1, 2), wherein each of the nut parts (1, 2) has a portion of the internal thread which can be pushed in a radial direction onto an external thread (25), and wherein the nut parts (1, 2) have connecting elements which interact with one another and which permit a relative displacement of the nut parts (1, 2), in a direction which runs radially with respect to the axis of the internal thread, as far as a use position in which the internal thread of the threaded nut engages around the external thread (25) with a small amount of play. The connecting elements have guide surfaces (9-20) which guide the nut parts (1, 2) of the threaded nut, during the displacement into the use position, in a rotational movement about a rotational axis which runs transversely with respect to the axis of the internal thread, wherein each nut part (1, 2) has at least one first locking arm (5, 7) which, on one side, has a guide surface (9, 11) which brings about the rotational movement during the displacement of the nut parts (1, 2) and which bears against a complementary guide surface (10, 12) on a second locking arm (6, 8) of the other nut part (1, 2). The threaded nut has a plurality of pressing threads (36-41) which are arranged around the internal thread and which receive pressing screws (26-31), which pressing screws can be screwed in an axial direction out of a first axial end surface (21) of the threaded nut and have a receptacle (35) for a screwdriver in the region of a second axial end surface (22) of the threaded nut, wherein at least one pressing thread (36, 39) is arranged in the first locking arm (5, 7) which has the first axial end surface (21), and wherein the second locking arm (6, 8) which has the second axial end surface (22) and which interacts with the first locking arm (5, 7) has a cutout (42, 43) through which the pressing screw (29, 26) extends.