Carriage for a linear guidance system and linear guidance system comprising such a carriage
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Solution Overview
Problem
Existing linear guide systems face challenges in precisely adjusting the force required to move the carriage relative to the rail element and defining the position of the carriage, with known designs allowing tilting or pivoting movements that cause acoustic and haptic disadvantages.
Innovation Solution
A carriage for a linear guide system is designed with a play reduction device that blocks rotational movements of the base body relative to the sliders about specific axes, allowing for reduced play and precise linear movement, using features like guide ribs, guide pins, and crimping webs to restrict rotational motion while maintaining linear mobility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If rolling elements are arranged between the carriage and the running surfaces, then friction is reduced, but the force required to move the carriage cannot be precisely adjusted and position cannot be precisely defined
Solution Approach 1:
The carriage is segmented into a base body and a slider that can move relative to each other. The slider carries the rolling elements and can be adjusted independently along the extension direction, allowing precise positioning while the base body maintains the structural connection to the rail element. This segmentation enables both low friction through rolling elements and precise position definition through the adjustable slider mechanism.
Solution Approach 2:
The slider is designed to be movable relative to the base body in the extension direction, creating a dynamic adjustment capability. This allows the force required to move the carriage and the position to be precisely defined and adjusted during operation, while the rolling elements continue to provide low friction movement between the slider and the running surfaces.
2Ease of operation
If the carriage allows rotational movement relative to the rail element, then ease of operation is improved, but play and tilting occur causing acoustic and haptic disturbances
Solution Approach 1:
The play reduction device is implemented locally at specific locations where rotational movement would occur, such as between the base body and the slider or between the slider and the running surfaces. This localized constraint eliminates play and prevents tilting in critical areas while maintaining overall ease of operation for the carriage's primary linear movement function.
Solution Approach 2:
The slider acts as an intermediary element between the base body and the running surfaces. It mediates the interaction by providing a controlled interface that allows necessary movement while preventing unwanted rotational play and tilting through its specific mounting and geometric design, thereby eliminating acoustic and haptic disturbances.
3Manufacturing precision
If guide ribs and rail ribs are arranged to block rotational movement, then play is reduced and precision is improved, but device complexity increases
Solution Approach 1:
The play reduction function is merged with the existing structural elements of the carriage and rail system. The guide ribs and rail ribs are integrated into the base body and slider design, combining the play reduction function with the structural support and guidance functions, thereby achieving precision improvement without proportionally increasing device complexity.
Solution Approach 2:
The guide ribs and rail ribs serve multiple functions: they provide structural support, guide the movement of the slider, and simultaneously block rotational movement to reduce play. This multi-functionality allows the same structural elements to achieve play reduction without requiring additional separate components, thus limiting the increase in device complexity.
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 effectively reduces play and prevents tilting, enhancing precision and stability, thereby improving the user experience by minimizing acoustic and tactile disturbances.
Implementation Method 1
a spring element, wherein the spring element is mounted on the base body in such a way that the spring element pretensions the first slider in the vertical direction away from the second slider
Implementation Method 2
the sliding surfaces of the first and the second slider can each be brought into frictional engagement with one of the running surfaces
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
The present invention relates to a slide for a linear guide system, comprising a rail element with two mutually facing running surfaces and the slide movable relative to the rail element in and against an extension direction (14), wherein the slide comprises a base body (8), a pair of a first and a second slider (11) with sliding surfaces (21) facing away from each other, wherein the sliding surface of the first and the second slider can be brought into frictional engagement with each of the running surfaces, and wherein the first slider is movably mounted on the base body relative to the extension direction in a vertical direction (12), and a spring element, wherein the spring element is mounted on the base body such that the spring element biases the first slider away from the second slider in the vertical direction.According to the invention, at least the base body or the first slider has a backlash reduction device (29), wherein the backlash reduction device is designed such that the first slider is mounted on the base body with essentially no backlash, so that at least one rotational movement of the base body relative to the first slider about an axis of rotation parallel to the upward direction is blocked by the backlash reduction device, or a rotational movement of the base body relative to the first slider about an axis of rotation perpendicular to the upward direction and the extension direction is blocked by the backlash reduction device.