Movable Cover Position Adjustment for Circular Saw Blade
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing desktop-type circular saws face challenges in maintaining the stability and accuracy of the movable cover's position relative to the saw blade and fixed cover, leading to potential misalignment and increased manufacturing costs due to the asymmetrical shape of the movable cover, which can result in errors during assembly and operation, especially when used in dark environments or with laser positioning systems.
Innovation Solution
A position adjusting mechanism is introduced that allows for the adjustment of the movable cover's position in a direction parallel to the thickness of the circular blade, enabling compensation for size errors and preventing interaction with the fixed cover, while also allowing for precise alignment of the laser beam transmission window, thus improving operability and reducing manufacturing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the movable cover is molded by resin with an asymmetrical fishhook-like shape, then the cover can function to cover and uncover the saw blade, but the size and shape stability becomes poor leading to positioning errors and increased manufacturing cost
Solution Approach 1:
A positioning mechanism is introduced as an intermediary component between the movable cover and the fixed cover. This mechanism includes a positioning member on the movable cover that engages with a positioning groove on the fixed cover, serving as a mediator to transfer and stabilize the position of the movable cover relative to the saw blade, thereby compensating for molding variations
Solution Approach 2:
The positioning mechanism allows for adjustment of the movable cover's position by changing the engagement depth or position of the positioning member in the positioning groove. This parameter adjustment capability enables compensation for size variations in the molded cover, ensuring accurate positioning without requiring high molding precision
2Ease of manufacture
If the movable cover is positioned excessively close to the fixed cover due to molding variations, then assembly becomes difficult, but increasing manufacturing accuracy or size control increases manufacturing cost
Solution Approach 1:
The positioning mechanism acts as an intermediary that standardizes the spacing between the movable cover and fixed cover. The positioning member and positioning groove create a defined engagement relationship that maintains appropriate clearance regardless of variations in the molded cover dimensions, facilitating easy assembly
Solution Approach 2:
The positioning mechanism provides dynamic adjustability, allowing the movable cover to be positioned at optimal distances from the fixed cover during assembly. This dynamic positioning capability accommodates variations in molding size without requiring strict size control, making assembly easier
3Measurement precision
If the movable cover position is not accurately controlled, then the laser beam transmission window cannot be properly aligned, but strict position control increases manufacturing cost and assembly time
Solution Approach 1:
The positioning mechanism serves as a simple intermediary structure consisting of a positioning member and positioning groove. This simple mechanical interface provides sufficient alignment accuracy for the laser beam transmission window without requiring complex positioning systems, maintaining low device complexity while achieving the required measurement precision
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A cutting tool (1) includes a tool unit (10) having a rotary circular blade (16), a movable cover (20) mounted to the tool unit (10) and having a cover body (22) movable in a moving direction to cover and uncover a part of the rotary circular blade (16) by the cover body (22), and a position adjusting mechanism (27) configured to adjust the position of the cover body (22) of the movable cover (20) in an adjusting direction different from the moving direction.