Pipe joints or couplings – With assembly means or feature – Particular tool-engaging means or with tool
Patent
1991-02-06
1993-08-03
Arola, Dave W.
Pipe joints or couplings
With assembly means or feature
Particular tool-engaging means or with tool
285421, 285323, 403367, F16L 3500
Patent
active
052322491
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention relates to a fastening or fixing device and a tool for securing the same.
Dependent on its utilization, a fixing device may in one a form include a clamping sleeve for fixing cog wheels, coupling halves, inner rings of roller bearings, and the like on shafts, for joining shafts or pipes, connecting pipes in T-joints, attaching a tool to a machine, etc., and may, in a second form include a nut for use on a non-threaded bolt.
The methods most well-known today for fixing wheels, coupling halves, and the like on shafts include use of keys, adapters, like "Taper Locks", and shrinking. The first mentioned method is labor consuming, and requires cutting wedge-shaped grooves in the shaft as well as in the wheel, whereas the second requires much space as well as being labor consuming, although it is a simple method in case of replacement or maintenance. The third method mentioned above, i.e. shrinking, is the method requiring least space. On the other hand, this method demands great accuracy in processing as well as special procedures, like heating/cooling in connection with mounting operations which are, thus, typically carried out in a workshop.
Screws and nuts are well-known fixing devices and are widely used in present technical equipment, but nuts and threads also have other uses than this conventional one, e.g. a nut may be used for locking a roller bearing on a shaft.
When the mentioned fixing devices are secured it is important to ensure clamping in a controlled and reliable manner. A clamping sleeve used as a structural member represents a novelty. Practical tests, however, have shown that the conventional hexagonal design of nuts provides an unsuitable wrench mount for sleeves, and the same is the case for hook wrenches. Such wrench mounts require too much axial space and/or too much thickness of sleeve material to be useful in practical cases.
It is, thus, desirable to develop new kinds of fixing devices which are especially useful for thin sleeves, like the clamping sleeve mentioned above, but also for the kind of nuts comprised by the present invention.
BRIEF DESCRIPTION OF THE DRAWINGS
FIGS. 1a and 1b illustrate the components of a clamping sleeve comprising an outer and an inner sleeve member according to the present invention.
FIG. 2 shows the outer sleeve and inner sleeve members according to FIG. 1 in a coupled state and surrounding a shaft,
FIG. 3a shows a variant of the embodiment of FIG. 1 with an outer and an inner locking sleeve member,
FIG. 4 illustrates the clamping sleeve according to FIGS. 3a and 3b in an assembled state and surrounding a shaft,
FIGS. 5a and 5b illustrate the components of a connecting coupling, and FIG. 6 shows the connecting coupling in an assembled state surrounding two pipe ends,
FIGS. 7a and 7b show a variant of the embodiments shown in FIGS. 5a, and 5b, respectively,
FIG. 8 shows the connecting coupling of FIG. 7 in an assembled state surrounding two pipe ends,
FIGS. 9a and 9b shown an outer sleeve, and an inner sleeve, respectively, for a nut for use on a bolt without threads,
FIGS. 10 and 11 show the outer portion of the nut engaged with its inner portion before, and after tightening, respectively,
FIGS. 12a, 12b illustrate a clamping sleeve with a wrench mount, illustrating a variant of the embodiment of FIG. 1,
FIG. 13 illustrates the clamping sleeve mounted on the shaft of a wheel,
FIG. 14 is a sectional view alone line XIV--XIV of FIG. 13, FIGS. 15 and 16 show a securing tool in the shape of a lever engaged before, and after, respectively, mutually turning outer and inner sleeve 1/7 revolution,
FIG. 17 illustrates an alternative securing mechanism utilizing two socket spanners,
FIGS. 18 and 19 show a front elevation, and a perspective view, respectively, of a modified securing tool for tightening the clamping sleeve as shown in FIGS. 12-14,
FIGS. 20 and 21 show a partly cut away side elevation, and a plan view, respectively, of a modification of the embodiment of FIGS. 18 and 19.
FIG. 22 illustrates releasi
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