RU1795904C - Adjustable-length ski stick - Google Patents

Abstract

SUMMARY OF THE INVENTION: A ski pole of adjustable length, comprising a telescopic tubular shaft with a handle, a cap rigidly mounted on the lower part of the outer tube, blocking means made of an extension of the inner tube and rigidly connected to it with a threaded end and an end configured to interacting with the inner cone of the elastic sleeve located in the outer tube and having an internal thread mating with the thread of the spacer and also containing a tip. The stick is equipped with a sealing ring located between the cap and the inner tube, while the outer surface of the elastic sleeve is made in the form of a truncated cone tapering to the thread of the sleeve. The angle at the apex of the inner cone of the elastic sleeve is advisable to perform less than the angle at the apex of the spacer cone by the angle at the apex of the truncated cone of the outer surface of the elastic sleeve. The ski pole may have a spacer stop with a diameter larger than the diameter of the o-ring, and a tubular stop mounted between the tubes and resting on the o-ring. 3 s.p. f-ly, 1 ill. ate with

Description

The invention relates to mountaineering, hiking, skiing and can be used for walking or skiing, as well as for various rod structures having a variable length: frames, probes, handles, tripods, and the like.

There is a known construction of an auxiliary tool, in particular an ice ax or a shovel, in which a clamping device with two parallel holes is provided for securing two parallel poles using known expansion sleeves or hand grip, which eliminates the unintended release of the poles by a clamping device. The expansion sleeve is threaded,

internal conical surface, external persistent cylindrical surface and longitudinal sections. The sleeve is screwed onto a threaded cone, expanding it in the pipe to be attached while tightening the joint.

A known design of a telescopic billiards ki, the length of which can be changed and fixed by turning the two sections around a common axis between the fastened and released positions. A lock is mounted inside the lock, which in the fastened position fixes the section due to frictional interaction. The cylindrical element of the lock extends during compression and interacts with

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the inner surface of the ki or shortens to interact with the outer surface of the inner section.

A ski stick of adjustable length is known, adopted for the prototype and having an inner, outer section and a locking device. The inner tube can be moved and rotated in the outer. The locking device comprises a spacer that lengthens the inner tube and is rigidly connected to it. The part is provided with an external thread and an expanding conical element. An expansion sleeve with a female thread is provided. The ski pole is characterized in that the spacer has an axis, the longitudinal movement of which is guided by the inner tube. A compression spring is provided between the inner sleeve and the spacer. The cap covering the junction of the outer and inner tubes is a purely decorative element. .. - .-; ;

The disadvantages of the prototype are the low density and strength of the joint assembly in the end regions of the tubular sections installed with a guaranteed clearance, structural complexity, limited reliability of some elements (springs, locknuts). The surfaces of the expanding sleeve and the inner tube are subject to increased wear due to a loose fit, the connection is weak in the extreme position and allows one tubular section to exit from another.

The aim of the invention is to increase the reliability and strength of an adjustable ski pole.

To this end, a ski pole of adjustable length, comprising a telescopic tubular rod with a cap handle rigidly mounted on the bottom of the outer tube, blocking means from an extension of the inner tube and a spacer rigidly connected to it with a thread and an end made with the ability to interact with the inner cone of the elastic sleeve located in the outer tube and having an internal thread mating with the thread of the spacer, and the tip is provided with a sealing ring located between the cap m and the inner tube, while the outer surface of the elastic sleeve is made in the form of a truncated cone tapering to its threaded base. The angle at the top of the inner cone of the elastic sleeve, it is advisable to perform less than the angle at the top of the cone of the spacer

the angle at the apex of the truncated cone of the elastic sleeve. The spacer part may be provided with a stop with a diameter greater than the diameter of the o-ring. Ski stick can be provided

tubular stop installed between

tubes and resting on the o-ring, may have more than two sections.

In drawing 1A and 16 shows a General

view of an adjustable ski pole according to the upper and lower positions of the outer tubular section, in FIG. 1c is a longitudinal sectional view of the structure of an articulation unit of tubular sections.

Ski stick of adjustable length in FIG. 1 has an outer 1 and an inner 2 tubular sections, a cap 3, a blocking means, a spacer 4 extending the inner section. On thread details

4, a sleeve 5 is fixed. Between the cap 3 and section 2, an o-ring 6 of elastic material is located. Between sections 1 and 2 there is a tubular stop 7. Sleeve 5 (for example, of high-strength

plastic) has an internal thread 8 and a cone 9 with an angle ft at the apex, the outer surface 10 of a truncated conical shape, with an angle y at the apex and a slot 11, which determine the stiffness of the elastic sleeve c.

radial direction. The spacer 4 has a conical protrusion 12 with an angle of 2 at the apex and a thread 13, an abutment 14 and a shank 15, The shank 15 is rigidly pressed into the inner section 2 (it is possible to press the shank internally or externally, as shown in Fig. 1c, item 2 ) A sleeve 5 is fixed on the thread 13, mounted with an elastic fit by the surface 10 in the outer section 1. The cap 3 together with the ring 6 is rigidly mounted on the end of the outer section 1. A tubular stop 7 is installed between the sections, the ring 6 and the stop 14. The angle a is advisable ask in

limits :.

It is possible to lubricate the thread and the conical protrusion 12. The stick has a handle 16 with a tip and a tip 17.

The construction of FIG. 1a, 16.1b works as follows, By rotating section 1 relative to section 2, the pair is loosened: the locking means (spacer) 4 is the sleeve 5, the threaded connection is loosened and the conical protrusion 12 comes out of contact with the inner cone 9 of the sleeve 5. The force in the axial direction moves the sections relative to each other by the required amount to reduce or increase the length of the stick. In this case, the sleeve 5 slides along the outer section 1 with friction, and the inner section 2 slides along the o-ring 6. Then, the connection unit is tightened in the threaded pair 8-13, while the spacer 4 through the thread 13 and the conical protrusion 12 presses the inner cone 9 of the sleeve, and the latter presses radially against the outer section 1. The frictional force resulting from the radial pressure fixes the sections in the axial direction. When the connection is tightened, the sleeve 5 does not spin in section 1 due to its elastic fit and the choice of angles a, / 3 and y. The necessary radial stiffness of the sleeve 5 is determined by the length of the slots 11, and the axial and radial forces of the elastic fit are determined by the outer diameters of the conical protrusion stop: the outer surface 10. The relative movement of the sections in the axial direction is limited by the stop 14 and the tubular stop 7: the stop 14 prevents the section from exiting 2 from section 1, and the tubular stop 7 increases the guaranteed joint area and the joint becomes stronger.

Compared with the prototype, the proposed design of a ski pole of adjustable length provides increased reliability and higher performance thanks to:

stress reduction and compaction

the junction of the sections with a ring of elastic material (for example, fluoroplastic) and increasing the strength of the end of the outer section by applying the force (and not decorative, as in the prototype) cap design:

improving the internal junction of the sections by making the sleeve taper on the outer surface, thereby reducing the force for relative movement of the sections, wear of the sleeve and uneven pressure on the external section; further improving the internal junction of the sleeve and the spacer on the conical surfaces by relatively changing the angles of the cones by a small amount of the angle of the external stop of the cone of the sleeve; limiting the relative displacement of the sections of the stick in the extreme position by applying the stop of the spacer part and the tubular stop, thereby increasing the guaranteed size of the joint zone of the sections in the most loaded area of the stick.

The listed advantages of the proposed design of a ski stick of adjustable length determine its

technical and economic efficiency.

Claims (4)

SUMMARY OF THE INVENTION 1. An adjustable length ski pole comprising a telescopic tubular shaft with a handle, a cap rigidly mounted on the bottom of the outer tube, blocking means from an extension of the inner tube and a spacer rigidly connected to it with a thread and an end configured to interacting with the inner cone of the elastic sleeve located in the outer tube and having an internal thread mating with the thread of the spacer, and a tip, characterized in that it is provided with a sealing ring m, located between the cap and the inner tube, while the outer surface is elastic the bushings are made in the form of a truncated cone stick tapering towards the threaded base. 2. A stick according to claim 1, characterized in that the angle at the apex of the inner cone of the elastic sleeve is less than the angle at the apex of the spacer cone by the angle at the apex of the truncated cone of the elastic sleeve. 3. The stick according to claim 1, with the proviso that the spacer is provided with a stop with a diameter larger than the diameter of the o-ring. 4. The stick according to claim 1, characterized in that it is provided with a tubular stop mounted between the tubes and resting on the o-ring.