Miter Saw Transport Lock Cam Mechanism
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Solution Overview
Problem
Existing transport locks for chop saws are not ergonomically optimal, making them difficult to operate and use effectively.
Innovation Solution
A cam mechanism that can be rotated about a bearing axis parallel to the transverse axis, actuated by a rotationally fixed knob, which allows for easy switching between blocking and release positions, providing a more intuitive and user-friendly transport lock system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a sliding pin transport lock is used, then the saw unit is securely locked in transport position, but the operation becomes difficult and non-ergonomic
Solution Approach 1:
The patent replaces the traditional sliding pin mechanism with a cam-based locking system. The cam (17) rotates about a bearing axis and interacts with a blocking lug (19) to provide locking and release functions. This substitution transforms the linear sliding motion into rotational cam motion, improving ergonomics while maintaining secure locking through the cam's geometric profile that engages with the blocking lug.
Solution Approach 2:
The transport lock transitions from a static sliding pin to a dynamic cam mechanism that can rotate between blocking and release positions. The cam's rotational movement allows for easier operation while the blocking lug ensures reliable locking when in the blocking position. The dynamic nature of the cam mechanism enables smooth transitions between locked and unlocked states.
2Reliability
If a sliding pin is positioned at the front of the workpiece support surface, then it provides effective locking, but it interferes with the workpiece support surface
Solution Approach 1:
The patent relocates the locking mechanism from the front horizontal position ( interfering with workpiece support) to a lateral position beside the carrier. The cam (17) is arranged on the saw unit and interacts with the blocking lug (19) on the holder in a lateral arrangement, moving the locking action to a different spatial dimension that does not interfere with the workpiece support surface area.
3Reliability
If a complex transport lock mechanism is used, then secure locking is achieved, but the device complexity increases
Solution Approach 1:
The cam mechanism serves multiple functions: it provides locking engagement with the blocking lug, enables easy release through rotation, and positions itself automatically during saw unit movement. The single cam component (17) replaces what would traditionally require multiple pins, springs, and actuators, reducing overall device complexity while maintaining reliable locking functionality.
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 cam-based transport lock enhances ergonomics, making the chop saw easier and more pleasant to use, ensuring secure locking and easy carrying of the saw unit during transport without interference with the workpiece support surface.
Implementation Method 1
a cam (17) that can be rotated about a bearing axis (16) parallel to the transverse axis (4)
Data Source
AI summary
The invention relates to a miter saw, comprising a carrier (1) forming a workpiece support surface (2), a mounting (3) attached to the carrier (1), and a saw unit (5) that is attached to the mounting (3) above the carrier (1) and can be pivoted about a lateral axis (4) from a raised resting position into a lowered sawing position and vice versa. The saw unit (5) is pretensioned in the direction of the resting position, wherein the saw unit (5) can be locked on the mounting (3) by means of transport securing means (15) in a lowered transport position, which is preferably as low as the lowest sawing position and/or in which a saw blade (8) of the saw unit (5) is inserted with a partial piece on the edge side into in an insertion slit in the workpiece support surface (2). The invention is characterized in that the transport securing means (15) comprises a cam (17) that can be rotated about a support axis (16), which is parallel to a lateral axis (4), and an actuating knob (18) that is non-rotatably coupled thereto, and a blocking pin (19) with which the cam (17) can be engaged in a blocking manner in the transport position, - blocking position of the cam (17).