Socket Spanner Insert With Retained Sleeve for Rim Protection
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Solution Overview
Problem
Existing socket spanner inserts cause damage to car rims during wheel mounting and removal due to high angular speeds and friction, leading to scratching and dirt particle-induced damage.
Innovation Solution
A socket spanner insert with a retaining element that prevents relative rotational movement between the sleeve and the rim, using a resilient material or elevations on the sleeve to establish a force-fitting contact with the wheel bolt hole, preventing sleeve rotation and allowing the base body to rotate freely, while also incorporating a connection element for a rotationally fixed connection with the tool.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the sleeve rotates together with the base body during wheel bolt release or fastening, then the socket spanner insert can function properly, but the sleeve causes scratching and damage to the rim due to high angular speeds and friction
Solution Approach 1:
The socket spanner insert is divided into two rotatable components: the base body and the sleeve. The retaining element selectively constrains the sleeve to prevent rotation relative to the rim, while allowing the base body to rotate freely within the sleeve. This segmentation enables the base body to perform its fastening function while the sleeve remains stationary relative to the rim, eliminating scratching.
Solution Approach 2:
The retaining element acts as an intermediary between the sleeve and the rim. It establishes force-fitting contact between the sleeve and the wheel bolt hole, preventing relative rotational movement. This intermediary component transfers the rotational constraint from the base body to the sleeve, allowing the base body to rotate while keeping the sleeve stationary relative to the rim.
2Speed
If the sleeve has a smooth surface to reduce friction, then the sleeve can rotate freely, but this leads to co-rotation of the sleeve with the base body which causes rim damage
Solution Approach 1:
The retaining element provides localized friction at specific contact points between the sleeve and the wheel bolt hole, while the rest of the sleeve surface remains smooth. This localized quality change enables the sleeve to remain stationary relative to the rim at the contact points while maintaining overall rotational freedom capability when needed.
3Object-affected harmful factors
If the sleeve establishes force-fitting contact with the wheel bolt hole to prevent rotation, then rim scratching is prevented, but dirt particles bind to the sleeve surface causing damage
Solution Approach 1:
The retaining element is designed with a porous or structured surface that allows dirt particles to enter and be trapped within its structure. This prevents dirt particles from binding to the outer surface of the sleeve and being transferred to the rim, while still maintaining force-fitting contact to prevent rotational movement and scratching.
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
Effectively prevents rim scratching and dirt particle-induced damage by ensuring the sleeve does not rotate relative to the rim, maintaining the base body's free rotatability and keeping dirt particles contained, thus protecting the rim during both mounting and removal of wheel bolts.
Implementation Method 1
a first retaining element has at least one contact element made of a resilient material, which element is formed on or fastened to the sleeve and establishes force-fitting contact of the sleeve at the side wall of the wheel bolt hole
Implementation Method 2
the contact elements or the outer surfaces thereof are spaced sufficiently far from the surface of the rotatable sleeve that, in the case of mounting, force-fitting contact of the contact elements on the wheel bolt holes is established
Data Source
AI summary
A socket spanner insert releases or fastens wheel bolts which in the mounted state rest inside wheel bolt holes of a car rim. The socket spanner insert includes a base body which has a screw head receptacle and a tool receptacle, and a sleeve which encompasses the base body at least in portions and is rotatably connected to the base body. In order to prevent damage to the rims when mounting and removing wheel bolts, a retaining element is provided which, during release or fastening of the wheel bolt, blocks a relative rotational movement of the sleeve with respect to the car rim and allows a rotation of the base body within the sleeve.