Two Piece Spindle FIxture

Abstract

The two piece spindle grinder fixture is adapted to minimize the size of the frame by a two piece spindle assembled into a frame having a bearing race formed between the frame and the two piece spindle. An angularity adjustable angle indicator mounted concentric with a spindle axis to allow the indicator to be adjusted relative to a part attached to the two piece spindle. A chuck or other holding tool may be mounted on the chuck end of the two piece spindle opposite a handle on a handle end.

Claims

1. A two piece spindle grinding fixture comprising: a frame, the frame having a front and a back, a frame aperture formed in the frame extending from the front to the back, the frame aperture having an aperture axis and an inside surface, an outer race in the inside surface, the outer race concentric with the aperture axis, the outer race disposed between the frame front and the frame back; a two piece spindle comprising a front spindle portion and a back spindle portion, the front spindle portion comprising a hollow front body having a front frame end and a front chuck end, a front bearing surface on the the front frame end, the front frame end in the frame aperture, the front bearing surface adjacent the outer race, the back spindle portion comprising a hollow back body, the hollow back body comprising a back frame end and a back handle end, a handle attached to the back handle end, a back bearing surface on the back frame end, the back frame end in the frame aperture, the back bearing surface adjacent the outer race, the back spindle portion bearing against the front spindle portion whereby a closed bearing race is formed between the outer race, the front bearing surface and the back bearing surface; and a plurality of bearings in the closed bearing race, the bearings bearing against the two piece spindle and the frame.

2. The two piece spindle grinding fixture of claim 1, further comprising an angle indicator on the back spindle portion concentric about the aperture axis, the angle indicator adjustable about the aperture axis.

3. The two piece spindle grinding fixture of claim 2, further comprising a mark on the frame adjacent the angle indicator.

4. The two piece spindle grinding fixture of claim 3, wherein the angular indicator is between the handle and the compressible portion, whereby the angular indicator is adjustably rotatable about the aperture axis.

5. The two piece spindle grinding fixture of claim 1, wherein the front spindle portion is removably attached to the back spindle portion.

6. The two piece spindle grinding fixture of claim 5, wherein the front bearing surface further comprises a taper on the front frame end, the back bearing surface further comprises a taper on the back frame end.

7. The two piece spindle grinding fixture of claim 6, further comprising an angular indexing mechanism wherein the two piece spindle may be fixed in a predetermined angular orientation about the axis.

8. A two piece spindle grinding fixture comprising: a frame comprising a body, the body having a front and a back, a frame aperture in the body, the frame aperture extending from the front to the back, the frame aperture having an axis and an inside surface, an outer race formed in the inside surface; a two piece spindle in the spindle aperture, the two piece spindle comprising a front spindle portion, and a back spindle portion, the front spindle portion in the the frame aperture, the back spindle portion in the frame aperture, the front spindle portion attached to the back spindle portion. a spindle V-groove on the two piece spindle, the spindle V-groove adjacent the outer race; and a plurality of bearings disposed in the outer race, each of the plurality of bearings bearing against the two piece spindle whereby the two piece spindle is held in spaced relation to the inside surface and the twop piece spindle is retained in the frame.

9. The two piece spindle grinding fixture of claim 8, wherein the front spindle portion is removably connected to the back spindle portion.

10. The two piece spindle grinding fixture of claim 9, further comprising a rotationally adjustable angle indicator on the two piece spindle, a reference mark on the frame, the angle indicator adjacent to the reference mark.

11. The two piece spindle grinding fixture of claim 10, further comprising a fixer on the two piece spindle, the angle indicator attached to the fixer.

12. The two piece spindle grinding fixture of claim 8, wherein the spindle V-groove further comprises a front bearing surface on the front spindle portion and a back bearing surface on the back spindle portion, the front bearing surface disposed adjacent the back bearing surface.

13. A two piece spindle grinding fixture comprising a frame and a two piece spindle, the frame comprising a body having a front and a back, a frame aperture in the body, the frame aperture having an inside surface and an axis, the inside surface extending through the body from the back to the front, an outer race in the inside surface, the outer race concentric with the axis, the two piece spindle having a spindle aperture surrounded by a spindle body, the spindle body having an outside, an inner race on the outside, the two piece spindle in the frame aperture, the inner race disposed adjacent the outer race, a plurality of bearings in the outer race, the bearings bearing against the two piece spindle, the outside in spaced relation to the inside surface, a handle end on the two piece spindle, a chuck end on the two piece spindle, an angle indicator on the two piece spindle.

Description

BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWING

[0013] FIG. 1 is a perspective view of the invention.

[0014] FIG. 2 is a cut away of the two piece spindle of FIG. 1 taken at approximately 2-2 of FIG. 1.

[0015] FIG. 3 is a cut away of the two piece spindle in the spindle housing of FIG. 1 taken at approximately 2-2 of FIG. 1.

DETAILED DESCRIPTION OF THE INVENTION

[0016] In the following detailed description of the preferred embodiments, reference is made to the accompanying drawings, which form a part of this application. The drawings show, by way of illustration, specific embodiments in which the invention may be practiced. It is to be understood that other embodiments may be utilized and structural changes may be made without departing from the scope of the present invention. (It is to be understood that the specific devices and processes illustrated in the attached drawings, and described in the following specification are simply exemplary embodiments of the inventive concepts defined in the appended claims. Hence, specific dimensions and other physical characteristics relating to the embodiments disclosed herein are not to be considered as limiting.

[0017] Referring to FIGS. 1 and 2, the improved two piece spindle 10 may be mounted in a frame 1. The two piece spindle 10 comprising a back spindle portion 2 and a front spindle portion 3. The front spindle portion 3 comprises a front body 7 having a front frame end 12, a front chuck end 14 and a front spindle aperture 16. The front spindle aperture 16 extends from the front frame end 12 to the front chuck end 14. A part holder 4 on the front chuck end 14. A front bearing surface 26 formed on the front frame end 12. The back spindle portion 2 comprises a back body 18 having a back frame end 20, a back handle end 22 and a back spindle aperture 25. The back spindle aperture 25 extends from the back frame end 20 to the back handle end 22. A back bearing surface 26 formed on the back frame end 20.

[0018] Continuing to refer to FIGS. 1 and 2, a plurality of bearings 28 may be disposed in the v-channel 33 formed by front bearing surface 26 and back bearing surface 28. A handle ring 5 extends from back handle end 6 and a handle 7 may be on the back spindle portion 2. An adjustable angle indicator 11 is mounted on two piece spindle adjacent frame 1. Adjustable angle indicator 11 may be attached by a releasable resilient fixer 15. Fixer 15 is attached to two piece spindle 10. Fixer 15 may be a releasable resilient attachment. The front spindle aperture 16 may have a front spindle surface 30. Back spindle aperture 25 may have a back spindle surface 32 disposed concentric with front spindle surface 30 forming a two piece spindle aperture 48. angular indexing mechanism 60 may comprise spring loaded pin 62 adapted to radially extend through frame 1 to engage indexing tabs 64 on two piece spindle 10.

[0019] Referring to FIG. 3, frame 1 comprises a base connector 9 for anchoring the frame 1, Frame 1 further comprises a frame aperture 31 extending from frame front 50 to frame back 52. Frame aperture 31 may have an axis 40 and frame aperture surface 54. Front spindle portion 3 is sized to fit concentrically in frame aperture 30, Front spindle portion 3 may be attached to back spindle portion 2 by bolt 36 disposed in hole 42 and threadably engaged to back spindle portion 2. Bolt 42 is adapted to bear against front spindle portion 3 to urge front spindle portion 3 to bear against back spindle portion 2. The front bearing surface 26 and back bearing surface 24 are each disposed at angle F and B respectively. Each of angles F and B are between 30 and 60 degrees toward the axis 40 to taper front frame end 12 and back frame end 20 respectively. Outer race 35 is formed in frame 10 in frame aperture 30 having a similar and reverse profile of spindle V-groove 33. Outer race 35 is disposed adjacent front bearing surface 26 and back bearing surface 24. Bearings 28 disposed in rectangular bearing race 38 are sized to provide a reduced friction interface between the frame 1 and the two piece spindle 10.The front frame end 14 is in the frame aperture 30. Back frame end 20 is in the frame aperture 30. Front frame end 14 is bearing against back frame end 20. Two piece spindle aperture 48 extending from front chuck end 4 to back handle end 22.

[0020] In use, a front portion 3 is placed on a flat surface having the axis of the aperture approximately vertical. The frame 1 is set on top of the front portion 3 having having outer race 35 adjacent front bearing surface 26. Bearings 28 may be disposed in outer race 35 and held by gravity as back portion 2 is inserted into the frame aperture and attached to front portion 3. Bearings 28 are retained in race 38.

[0021] Although the description above contains many specifications, these should not be construed as limiting the scope of the invention but as merely providing illustrations of some of the embodiments of this invention. Thus, the scope of the invention should be determined by the appended claims and their legal equivalents rather than by the examples given. Further, the present invention has been shown and described with reference to the foregoing exemplary embodiments. It is to be understood, however, that other forms, details, and embodiments may be made without departing from the spirit and scope of the invention which is defined in the following claims.