Patent ID: 7931223

Claim:
In a cone crusher comprising a main shaft having a lower end and an upper end, an eccentric seat surrounding said lower end of said main shaft, a cone core surrounding said main shaft, a movable jaw plate enclosing an exterior side of said cone core, and a dust-proof structure provided at a lower side of said cone core, the improvement wherein said dust-proof structure comprises a dust ring, an adjustment washer, a dust collar and a plurality of screwing elements, said cone core having a lip part, said dust ring being suspended under said cone core and attached at said lip part of said cone core thereby allowing said dust ring to operate concurrently with said cone core, said dust ring having a lower side attached with said dust collar, said adjustment washer being mounted between said dust ring and said dust collar and fixed by said screwing elements, wherein lubricant oil is provided between said dust ring and said cone core thereby allowing said dust ring to be attached with said lip part of said cone core and therefore preventing dust from entering into said cone crusher, and when said dust ring is worn out, said dust ring can be replaced with a new dust ring, or removed to tighten said dust ring by said screwing elements.