Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
  • B60B33/00—Castors in general; Anti-clogging castors
  • B60B33/0002—Castors in general; Anti-clogging castors assembling to the object, e.g. furniture
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
  • F16B13/00—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose
  • F16B13/04—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front
  • F16B13/06—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front combined with expanding sleeve
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
  • F16B2/00—Friction-grip releasable fastenings
  • F16B2/02—Clamps, i.e. with gripping action effected by positive means other than the inherent resistance to deformation of the material of the fastening
  • F16B2/04—Clamps, i.e. with gripping action effected by positive means other than the inherent resistance to deformation of the material of the fastening internal, i.e. with spreading action

Definitions

• the invention relates to a device for releasably fastening a first part in an opening of a second part according to the preamble of claim 1.
• clamping elements are formed by clamping pins which have a plurality of radial cone segments which can be braced relative to one another.
• Such clamping pins are complicated and expensive to manufacture.
• the invention is based on the object of realizing a fastening device which is simpler and cheaper to produce and which also enables rapid assembly, for example in tubular parts.
• this object is achieved by a device as defined in claim 1.
• 1 is a partial longitudinal section of a clamp connection of two parts, which is realized by means of a first embodiment of the invention
• FIG. 2 shows a clamping connection of two parts, which is realized by means of a second embodiment variant of the invention, in partial longitudinal section
• 3 shows a clamping connection of two parts, which is realized by means of a third embodiment variant of the invention, in partial longitudinal section
• FIG. 4 shows a schematic illustration of the clamping elements of a device according to the invention in their non-clamping state
• FIG. 5 shows a schematic illustration of the clamping elements according to FIG. 4 in the state in which a clamping effect is thereby achieved
• FIG. 6 shows a clamping connection of two parts, which is realized by means of a fourth embodiment variant of a device according to the invention, in partial longitudinal section,
• Fig. 7 is a clamp connection of two parts, which is realized by means of a fifth embodiment of the invention, in partial longitudinal section, and
• FIG. 8 shows an embodiment variant of a device according to the invention with a clamping attachment, which additionally simplifies the application of the invention, since it largely makes the use of a tool for clamping the device superfluous.
• a first embodiment variant of the device according to the invention has a first part 1 to be connected to a second part 2, a carrier 4 in which a roller 5 is mounted.
• a tube 6 is fastened, which has an opening 3 and in which the first part 1 is to be fastened.
• the carrier 4 is provided with a flange 4a.
• a support disk 9 is arranged on a pin 8 which is inserted into a bore 7 in the flange 4a and is formed by a screw. By means of a nut 10, the pin 8 and the support washer 9 with the Carrier 4 connected.
• the pin 8 is surrounded by two helical springs 11, 12 screwed onto one another of the same pitch, of which the inner 11 is connected to the support disk 9 in a manner not shown here, for example by gluing.
• the inner coil spring 11 is in contact with a pressure disc 13, which is axially adjustable on the pin 8 by means of an adjusting nut 14.
• this embodiment variant of a device according to the invention is shown in the active position of the coil springs 11, 12, in which the outer coil spring 12 presses against the opening 3 of the sleeve 6.
• the support disk 19 is provided with a radial centering surface 20, the diameter of which corresponds approximately to the opening 3 of the sleeve 6.
• the support disc 19 also has an axial stop 21 with which it rests on an end face 16 of the sleeve 6.
• the pressure plate 23 is also provided with a cylindrical centering surface 22, the diameter of which corresponds approximately to that of the opening 3.
• FIG. 3 shows a variant of the device according to the invention which essentially corresponds to FIG. 1 and differs from that in that a bushing 24 provided with a slot 24a is resiliently inserted into the tubular sleeve 6.
• a sleeve-shaped tube closure 6a is at least limitedly flexible in the radial direction in the interior of a tube 2a.
• the outer coil spring 12 presses radially against this pipe closure 6a and presses it firmly into the pipe 2a.
• FIG. 7 shows how a part 2b, for example a gearwheel, can be fastened on a shaft 1b by means of a device according to the invention.
• the shaft 1b is provided with a pin 8b which has a cylindrical surface 35
• a pressure disk 33 which can be axially adjusted by means of a screw 34 can hold the central coil spring 11 of a spring assembly which, in addition to the two coil springs 11, 12, has an innermost coil spring 30, press together so that the innermost coil spring 30 firmly encloses the pin 8b, whereas the outer coil spring 12 is pressed firmly against the opening 3 of the gear 2b.
• the device according to the invention also enables parts such as e.g. of gears, V-belt pulleys etc., for torque transmission, as shown in FIG. 7.
• the size of the torque to be transmitted can be determined within wide limits by the selection of a suitable contact pressure generated by the contact disk 33.
• the clamping action between the additional coil spring 30 and the cylindrical surface 35 of the shaft 1b also comes into play here.
• a plurality of separate outer coil springs 12 are arranged axially one behind the other on the inner coil spring 11. Accordingly, in the exemplary embodiment of a device according to the invention shown in FIG. 7, a plurality of additional coil springs 30 can also be arranged axially one behind the other. But also an arrangement of several axially separated spring assemblies with A plurality of inner coil springs 11 arranged axially one behind the other can be realized and is advantageous in certain cases.
• the bushing 24 made of hard material can advantageously be used.
• coil springs other than a round cross section can also be selected in order to achieve a more favorable surface pressure on the opening 3 or on the cylindrical surface 35 (FIG. 7).
• a pipe closure 6a can also be accomplished in a simple manner in any axial position in a pipe 2a.
• an outer coil spring 12 was arranged on an inner coil spring 11 in the radial direction.
• several outer coil springs 12 can be screwed onto one another.
• several additional helical springs 30 can also be screwed into one another according to FIG. 7.
• the screw 43 passes through the hollow screw 44 and has a threaded part 43a which has a pitch which is different from that of the threaded part 44a of the hollow screw 44. If the screw sleeve 42, which accordingly has a first internal thread part 42a with a pitch according to the pitch of the thread part 42a of the screw 43 and a second internal thread part 42b with a pitch according to the thread part 44a of the hollow screw 44, is rotated, this results from the different pitches the various threads cause a linear differential movement between the clamping jaws 40 and 41, which moves in a common direction of movement, which is symbolized by the double arrow 45.
• the clamping jaws 40 and 41 at different linear speeds are either screwed into or unscrewed from the screw sleeve 42 at the same time. Through this speed difference it can be achieved that the clamping jaws 40 and 41 slowly approach each other by turning the screw sleeve 42, in such a way that the inner coil spring 11 is compressed and the outer coil spring 12 is thereby pushed outwards, thereby producing the clamping action described above can.
• the linear speed difference can be determined by an adequate choice of the two thread pitches so that a large linear force is generated between the clamping jaws 40 and 41 by a small torque on the screw sleeve 42, which makes the use of a tool for rotating the screw sleeve 42 superfluous .

Landscapes

• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Clamps And Clips (AREA)
• Mutual Connection Of Rods And Tubes (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=4275474

Family Applications (1)

Country Status (7)

Families Citing this family (2)

Family Cites Families (4)

• 1989
  • 1989-11-28 JP JP50049290A patent/JPH03504479A/ja active Pending
  • 1989-11-28 AU AU45281/89A patent/AU4528189A/en not_active Abandoned
  • 1989-11-28 BR BR898907185A patent/BR8907185A/pt unknown
  • 1989-11-28 EP EP19890912791 patent/EP0403611A1/de not_active Withdrawn
  • 1989-11-28 WO PCT/CH1989/000210 patent/WO1990006238A1/de not_active Application Discontinuation
• 1990
  • 1990-07-25 DK DK177490A patent/DK177490A/da not_active Application Discontinuation
  • 1990-07-27 FI FI903757A patent/FI903757A0/fi not_active IP Right Cessation

Non-Patent Citations (1)

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