Spike Setting Gun Roller Spreading Mechanism Wear Reduction
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Solution Overview
Problem
Existing spike setting guns experience high wear and short service life due to the small contact surface between the sleeve and spreading fingers, leading to high operating costs and maintenance requirements.
Innovation Solution
The spike setting gun employs freely rotatably mounted rollers along the inner walls of the spreading fingers to transmit force, reducing friction and wear, and features a mechanical coupling between the setting bolt and rollers for precise control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If a sleeve is used as the spreading device to push apart the spreading fingers, then the force required to spread the fingers is transmitted effectively, but the small contact area between the sleeve and spreading fingers causes high wear and short service life
Solution Approach 1:
Rollers are introduced as intermediary elements between the setting bolt and the spreading fingers. These rollers transmit the spreading force while reducing direct contact and friction between the setting bolt and spreading fingers, thereby significantly reducing wear on both components and extending their service life
Solution Approach 2:
The sliding friction mechanism between the sleeve and spreading fingers is replaced with a rolling friction mechanism using rollers. This substitution of mechanical interaction mode dramatically reduces wear and extends the operational lifespan of the spreading device components
2Duration of action of stationary object
If the contact area between the sleeve and spreading fingers is increased to reduce wear, then the service life is extended, but the structure becomes more complex and the force transmission less efficient
Solution Approach 1:
The spreading force transmission is segmented into multiple discrete roller elements rather than a single continuous contact surface. Each roller independently transmits force to the spreading fingers, distributing the wear across multiple small contact points while maintaining structural simplicity and efficient force transmission
3Ease of operation
If force is transmitted directly through the spike to spread the fingers, then the spreading action is achieved, but the spike is subjected to high stress and potential damage
Solution Approach 1:
Rollers serve as intermediary elements that transfer the spreading force from the setting bolt to the spreading fingers without requiring the spike to bear this load. The spike only needs to withstand the insertion force, while the rollers handle the spreading force, protecting the spike from damage
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 design significantly reduces wear on the rollers and spreading fingers, extending the service life and lowering maintenance needs, while allowing for the setting of spikes from various materials with minimal force transfer through the spike itself.
Implementation Method 1
all rollers can roll along control cams (10a, 10b) on the inner walls (10) of the spreading fingers to move the spreading fingers apart
Data Source
Figure 1
Figure 2a~2e
AI summary
The invention relates to a spike setting gun having a gun housing and a gun head (1) arranged about a central main axis (a1), into which gun head a setting device (4) having a setting bolt (3), which can travel along the main axis (a1) between an initial position and a setting position, protrudes, wherein the gun head (1) has spreading fingers (2), which are arranged about the main axis (a1) and are pressed to each other in the initial position by means of at least one elastic clamping element (8) and have spreading elements (2a) for expanding a spike hole (12), wherein the spreading fingers (2) can be simultaneously pushed apart from each other by means of a spreading device (5) located in the pistol head (1). The spreading device (5) has freely rotatably mounted rollers (5), wherein at least one roller (5) is provided per spreading finger (2) and all rollers (5) can roll along control cams (10a) on the inner walls (10) of the spreading fingers (2) in order to move the spreading fingers (2) apart.