TR razr sharpening system

Abstract

A device is disclosed for grinding reel type mower bedknives and blades of rotary type and reel type mowers. The device is capable of manually relief grinding reel blades on an intact mower, and in various stages of disassembly, to a bare reel stripped of its housing, with virtually any relief angle. The device can manually and semiautomatically spin grind a reel type mower reel while the reel is attached to the complete mower or if the reel and supporting structure are removed to a bench, with no further disassembly required. The device can manually grind the front face of a reel type mower bedknife while the bedknife remains attached to the reel housing and can grind the front and top face of a bedknife when it is removed. It can also grind rotary type blades and a variety of other straight edged tools.

1 . A single portable device for grinding a detached rotary type mower blade and the blades and bedknife of a reel type mower, with or without removal from the complete mower and with or without disassembling the reel or bedknife from its' housing, which is capable of both single blade (relief) grinding and spin grinding of said reel and front and top face grinding of said bedknife comprising:
 a. a carriage unit frame including two transverse rods and side-rails substantially parallel to one another.   b. a carriage unit supported on said guide rods of said carriage unit frame adapted for translation along said guide rods.   c. a grinder bracket supported on said carriage unit capable of supporting a commercially available angle grinder in a manner that allows grinding operations with the face or edge of the grinding wheel.   d. a means for said grinder bracket of said carriage unit to be slidably adjusted, inward or outward, to control the depth of grind.   e. a means by use of an adjustable set of carriage unit side-rail brackets releasably attached to said carriage unit side-rails that releasably attach the said carriage unit frame to the reel support structures in a position that, when traversing the said carriage unit across the said guide rods, the said carriage unit maintains a distance parallel to the longitudinal axis of the reel in two perpendicular planes.   f. a means by use of accessory brackets attached to said carriage unit side-rail brackets that allow the said carriage unit frame to attach to a variety of reel mower housing styles in either a four point or three point attachment configuration.   g. a means by use of an adjustable reel roller clamp to allow a three point carriage unit attachment configuration.   h. a means by use of brackets attached to said carriage unit side-rail brackets, fixtured with centering bearings that allow the said carriage unit frame to be releasably attached directly to a barren reel in a position that allows relief grinding.   i. a means by use of accessory brackets attached to the said carriage unit side-rail brackets that allow releasable attachment of a drill supporting bracket capable of positioning a commercially available variable speed reversible drill in a manner that it may be used as a source of power to spin a reel of a reel type mower during spin grinding.   j. two releasable clamping means attached to said carriage unit used for attaching accessory brackets.   k. an accessory bracket releasably attached to the first said clamping means of said carriage unit configured to support the back side of a reel blade effectively trapping the blade between said bracket and the grinder wheel during relief grinding.   l. an accessory bracket releasably attached to second said clamping means of said carriage unit configured to be used as a visual aid when aligning individual blades of a reel during relief grinding.   m. an accessory bracket releasably attached to the second said clamping means of said carriage unit supporting a set of calipers configured to a certain that the said carriage unit frame, when in use, is aligned parallel to the reel axis or surface being ground in two perpendicular planes.   n. a set of accessory brackets releasably attached to the first and second said clamping means of said carriage unit configured so that, during the operation of grinding the front face of a bedknife within its' reel housing, the brackets make contact with the reel blades and rotate them away from the grinding wheel as it traverses the length of the bedknife during grinding.   o. a means by use of a base stand to support and position a reel housing for said carriage unit side-rail bracket attachment when the reel and supporting housing are removed from the mower. This said base stand provides an adjustable means to support reels of variable widths and accessory brackets to provide one point of fixation during three point carriage unit attachment. It also provides a means by use of a pair of removable straps that allow releasable attachment of the said carriage unit frame, void of said carriage unit side-rail brackets, directly to the said base stand when employing the bedbar during rotary blade and bedknife grinding.   p. a said bedbar, comprised of two parallel bedbar rails supporting a connecting bar or table, with a means that allows said bedbar rails to be releasably attached to said carriage unit frame releasably attached to said base stand, creating a work surface parallel in two perpendicular planes to the longitudinal travel of the said carriage unit when traversed on the said guide rods.   q. a means by use of a set of bedbar brackets releasably attached to said bedbar that releasably attach to the ends of a bedknife that can be manipulated and fixed in a manner that aligns the said bedknife in multiple positions, parallel in two perpendicular planes to the said carriage unit, to facilitate front and top face bedknife grinding, when said carriage unit is traversed on said guide rods.   r. a means by use of a sliding bedbar bracket that releasably attaches to a channel in the mid-portion of said bedbar supporting a post and clamping means to releasably attach a rotary type blade to said bedbar in a manner that aligns the rotary blades' edge parallel in two perpendicular planes to the said carriage unit when traversed on said guide rods and in a position where the attached grinder wheel of said carriage unit will produce the desired grind angle and taper.   s. a means by use of a blade stop releasably attached to the said bedbar during rotary blade grinding that will allow the said rotary blade to be flipped precisely end for end achieving the same grind angle and taper at each end.   t. a means for automatic translation of said carriage unit on said guide rods in both directions using a small electric motor, sprockets, and a looped chain bearing a post, supported on an adjustable bracket with a means for clamping said bracket to said carriage unit side-rails creating a union between said chain post and a post capturing cup fixed to said carriage unit.