WO1994012381A1 - Device for fixing sprung head stem of bicycle handle-bars into the front fork - Google Patents

Device for fixing sprung head stem of bicycle handle-bars into the front fork Download PDF

Info

Publication number
WO1994012381A1
WO1994012381A1 PCT/CZ1993/000002 CZ9300002W WO9412381A1 WO 1994012381 A1 WO1994012381 A1 WO 1994012381A1 CZ 9300002 W CZ9300002 W CZ 9300002W WO 9412381 A1 WO9412381 A1 WO 9412381A1
Authority
WO
WIPO (PCT)
Prior art keywords
fixing
bars
front fork
head stem
wedge
Prior art date
Application number
PCT/CZ1993/000002
Other languages
French (fr)
Inventor
Rudolf MOVOTNY^´
Original Assignee
Haen Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Haen Ltd filed Critical Haen Ltd
Publication of WO1994012381A1 publication Critical patent/WO1994012381A1/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62K—CYCLES; CYCLE FRAMES; CYCLE STEERING DEVICES; RIDER-OPERATED TERMINAL CONTROLS SPECIALLY ADAPTED FOR CYCLES; CYCLE AXLE SUSPENSIONS; CYCLE SIDE-CARS, FORECARS, OR THE LIKE
    • B62K21/00—Steering devices
    • B62K21/18—Connections between forks and handlebars or handlebar stems
    • B62K21/20—Connections between forks and handlebars or handlebar stems resilient
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62K—CYCLES; CYCLE FRAMES; CYCLE STEERING DEVICES; RIDER-OPERATED TERMINAL CONTROLS SPECIALLY ADAPTED FOR CYCLES; CYCLE AXLE SUSPENSIONS; CYCLE SIDE-CARS, FORECARS, OR THE LIKE
    • B62K21/00—Steering devices
    • B62K21/12—Handlebars; Handlebar stems
    • B62K21/14—Handlebars; Handlebar stems having resilient parts therein

Definitions

  • the invention relates to a device for fixing sprung head stem (stem assembly) of handle-bars into the bicycle front fork.
  • the present device for fixing the sprung head stem of the handle-bars into the bicycle front fork characterized by proving the fixing tube on its bottom end by a wedge-shaped ending and by at least two lengthwise slots on its surface.
  • longitudinal pull rods are fitting which are provided by a thread on their upper ends. The thread fits into a cap nut, resting on a supporting ring.
  • the pull rods are, at their bottom, connected with the carrier of the expanding wedge resting thereon.
  • Fig.1 illustrates location of head stem in the frame of bicycle and it a axonometric representation.
  • Fig. 2 illustrates a longitudinal section and cross section.
  • FIG. 1 shows diagrammatically an example of the invention.
  • the fixing tube 1 on its bottom, provided by a wedge-shape ⁇ ending 6.
  • On the surface of said tube at least two slots (3) are symmetrically milled, into which slots the pull rods (2), provided at their tips by a thread are fitting.
  • the pull rods are jointed into an entire tube, into which is fixed, by means of transversal pegs, the carrier (4) of the expanding wedge (5) resting thereon.
  • a can nut (7) is rotatably placed on the supporting ring (8).
  • the invention can be utilized wherever it is necessary to realize a dismountable joint of cylindrical parts into blind openings, under preserving the possibility of passing through the interior of said parts.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Steering Devices For Bicycles And Motorcycles (AREA)

Abstract

Device for fixing a sprung head stem of handle-bars into the bicycle fork is formed in such a way that the fixing tube (1) possesses on its surface longitudinal slots (3) and is wedge-like ended at the bottom. Into the slots (3) are fitting the pull rods (2) reaching with their tips, provided by a thread, into a cap nut (7), resting on a supporting ring (8). The expanding wedge (5) is placed on the carrier (4) which is permanently connected with the pull rods (2).

Description

Device for fixing sprung head stem of bicycle handle-bars into the front fork
Technical Field
The invention relates to a device for fixing sprung head stem (stem assembly) of handle-bars into the bicycle front fork.
Backgroud Art
The fixing of the head stem of handle-bars into the bicycle front fork known hitherto is derived from the subject matter of the U.S. Patent Specification No. 4130 260, consisting in inserting the hollow column of the head stem or of the handle-bars into the hollow column of the front fork, said head stem having on its bottom part two lengthwise grooves and an inner conical bevelling. Into in there is drawn, by means of a screw, an expanding cone, pushing the bottom part of the head stem column or of the handlebars against the inner cylindrical ..surface of the front fork column, the friction thus developed ensures fixed connection of the two parts. A similar fixing mode is described in the Czechoslovak Patent No. 226 403, wherein between the free end of the handle-bars column or that of the head stem shaped as a truncated cone, and the free end of the front fork column a cylindrical nut with inner conical surface and at least one longitudinal slot is pushed in by means of a screw. Both modes of fixing possess the disadvantage that they do not allow linear motion of the head stem regarding the front fork column. Moreover, the axial screw makes impossible the utilization of the tube interior for springing the handle-bars. Disclosure of Invention
The above mentioned shortcomings are removed by the present device for fixing the sprung head stem of the handle-bars into the bicycle front fork, characterized by proving the fixing tube on its bottom end by a wedge-shaped ending and by at least two lengthwise slots on its surface. Into said slots longitudinal pull rods are fitting which are provided by a thread on their upper ends. The thread fits into a cap nut, resting on a supporting ring. The pull rods are, at their bottom, connected with the carrier of the expanding wedge resting thereon. The advantage of this device consists in the possibility of springing the head stem of the handle bars, utilizing, if desired, interior of the fixing tube.
Brief Description of Drawings in Fig.1 illustrates location of head stem in the frame of bicycle and it a axonometric representation. Fig. 2 illustrates a longitudinal section and cross section.
Mode for Carrying Out the Invention
The drawings shows diagrammatically an example of the invention. In this example is the fixing tube 1 on its bottom, provided by a wedge-shapeά ending 6. On the surface of said tube at least two slots (3) are symmetrically milled, into which slots the pull rods (2), provided at their tips by a thread are fitting. In their lower parts the pull rods are jointed into an entire tube, into which is fixed, by means of transversal pegs, the carrier (4) of the expanding wedge (5) resting thereon. On the upper part of the fixing tube (1) a can nut (7) is rotatably placed on the supporting ring (8). Industrial Applicability
The invention can be utilized wherever it is necessary to realize a dismountable joint of cylindrical parts into blind openings, under preserving the possibility of passing through the interior of said parts.

Claims

C l a i m
Device for fixing sprung head stem of handle-bars into the bicycle front fork, consisting of a wedge-shaped ending of the tube- and of an expanding wedge,
c h a r a c t e r i z e d b y t h a t the fixing tuba (1) is, on its bottom, provided by a wedge-shaped ending (6) and on its surface by at least two slots (3), into which slots the pull rods (2) are fitting, said pull rods being provided on their tops by a thread reaching into the cap nut (7) resting on the supporting ring (8), the pull rods being in their bottom part connected with the carrier (4) on which the expanding wedge (5) is resting.
PCT/CZ1993/000002 1992-11-26 1993-01-26 Device for fixing sprung head stem of bicycle handle-bars into the front fork WO1994012381A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CS923494A CZ349492A3 (en) 1992-11-26 1992-11-26 Device for fastening a handlebars spring-loaded adapter in a bicycle fork
CSPV3494-92 1992-11-26

Publications (1)

Publication Number Publication Date
WO1994012381A1 true WO1994012381A1 (en) 1994-06-09

Family

ID=5375202

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CZ1993/000002 WO1994012381A1 (en) 1992-11-26 1993-01-26 Device for fixing sprung head stem of bicycle handle-bars into the front fork

Country Status (3)

Country Link
CZ (1) CZ349492A3 (en)
SK (1) SK349492A3 (en)
WO (1) WO1994012381A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100410130C (en) * 2004-08-27 2008-08-13 本田技研工业株式会社 Rider restriction device of two-wheeled vehicle
CN100439193C (en) * 2004-06-17 2008-12-03 本田技研工业株式会社 Occupant restraining device for two-wheel vehicle
US11511825B2 (en) * 2020-01-29 2022-11-29 Christopher William Huber Suspension handlebar assembly and stem for bicycle

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE602077C (en) * 1933-07-09 1934-08-31 Gustav Mielau Spring-loaded bicycle handlebar
FR1052078A (en) * 1952-03-05 1954-01-21 Elastic handlebar device for cycles
US4167352A (en) * 1977-10-06 1979-09-11 Gebrueder Pletscher Apparatus for the releasable force-locking of two telescopic tubes, especially for clamping the steering housing tube in the steering fork tube of a bicycle
DE3544283A1 (en) * 1984-12-14 1986-10-23 Selter, Marlen, 5952 Attendorn Fastening dowel

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE602077C (en) * 1933-07-09 1934-08-31 Gustav Mielau Spring-loaded bicycle handlebar
FR1052078A (en) * 1952-03-05 1954-01-21 Elastic handlebar device for cycles
US4167352A (en) * 1977-10-06 1979-09-11 Gebrueder Pletscher Apparatus for the releasable force-locking of two telescopic tubes, especially for clamping the steering housing tube in the steering fork tube of a bicycle
DE3544283A1 (en) * 1984-12-14 1986-10-23 Selter, Marlen, 5952 Attendorn Fastening dowel

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100439193C (en) * 2004-06-17 2008-12-03 本田技研工业株式会社 Occupant restraining device for two-wheel vehicle
CN100410130C (en) * 2004-08-27 2008-08-13 本田技研工业株式会社 Rider restriction device of two-wheeled vehicle
US11511825B2 (en) * 2020-01-29 2022-11-29 Christopher William Huber Suspension handlebar assembly and stem for bicycle

Also Published As

Publication number Publication date
CZ349492A3 (en) 1994-06-15
SK349492A3 (en) 1995-01-05

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