Patent ID: 8172719
Filing Date: 2012-05-08
Classification: B32B,F16H

Abstract:
1. A continuously variable speed-changing transmission mechanism of a sheet laminating apparatus for driving rotation of a hot press roller module of said sheet laminating apparatus at a variable rotating speed, said continuously variable speed -changing transmission mechanism comprising: a speed changing module comprising a friction wheel, a power input transmission wheel and a power output transmission wheel, wherein a first end of a rod set is connected to a middle portion of said friction wheel such that said friction wheel is vertically connected to said rod set, said power input transmission wheel and said power output transmission wheel are sheathed around a power transmission shaft and spaced from each other, said power input transmission wheel is fixedly connected to said power transmission shaft, said power output transmission wheel is pivotally connected to said power transmission shaft, said power input transmission wheel and said power output transmission wheel are conical wheels having respective smaller-area top circular surfaces and respective larger-area bottom circular surfaces, and said top circular surfaces of said power input transmission wheel and the power output transmission wheel face to each other such that both sides of said friction wheel are simultaneously sustained against conical sidewalls of said conical wheels, wherein said speed changing module further includes a second friction wheel, a first end of a second rod set is connected to a middle portion of said second friction wheel such that said second friction wheel is vertically connected to said second rod set, and both sides of said second friction wheel are simultaneously sustained against conical sidewalls of said conical wheels such that said second friction wheel is swung along a second arc-shaped trajectory; a control module having a controlling source and connected to said rod set for driving said rod set and swinging said friction wheel along an arc-shaped trajectory, wherein a contact area between said friction wheel and said power input transmission wheel and said power output transmission wheel is changeable by adjusting a swing angle of said friction wheel, wherein said control module further includes: a control shaft, a first end of said control shaft is connected to a second end of said rod set such that said control shaft is vertically connected to said rod set, and when said control shaft is driven by said controlling source, said friction wheel is swung along said arc-shaped trajectory with an axle center of said control shaft serving as a center point and the length of said rod set serving as a radius: a sector element having a sectorial center, wherein said sectorial center is connected a second end of said control shaft such that said sector element is vertically connected to said control shaft; an arc-shaped recess formed in said sector element and having a ratchet structure on an inner wall thereof; a shift lever having a first end connected to said controlling source, wherein a connecting ratchet is formed on a second end of said shift lever and engaged with said ratchet structure of said arc-shaped recess, wherein when said shift lever is driven by said controlling source, said ratchet structure is driven by said connecting ratchet, so that said sector element is swung along said arc-shaped trajectory with respect to said axle center of said control shaft and said control shaft is synchronously rotated along said arc-shaped trajectory; a second control shaft, wherein a first end of said second control shaft is connected to a second end of said second rod set such that said second control shaft is vertically connected to said second rod set; and a second sector element having a second sectorial center, wherein said second sectorial center is connected a second end of said second control shaft such that said second sector element is vertically connected to said second control shaft, wherein arc-shaped edges of said sector element and said second sector element have teeth structures engaged with each other, so that said sector element is swung along a second arc-shaped trajectory with respect to an axle center of said second control shaft, and said second friction wheel is swung along said second arc-shaped trajectory with said axle center of said second control shaft serving as a center point and the length of said second rod set serving as a radius; a motor connected to said power transmission shaft for driving said power transmission shaft, wherein due to a friction force between said friction wheel and said power input transmission wheel that is fixedly connected to said power transmission shaft, said friction wheel is synchronously rotated with said power input transmission wheel, and due to a friction force between said friction wheel and said power output transmission wheel that is pivotally connected to said power transmission shaft, said power output transmission wheel is synchronously rotated with said friction wheel; and a speed reducing module having both ends respectively connected to said hot press roller module and said power output transmission wheel, so that said hot press roller module is rotated at a rotating speed lower than said power output transmission wheel.