Classifications

• • 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
  • F16H—GEARING
  • F16H19/00—Gearings comprising essentially only toothed gears or friction members and not capable of conveying indefinitely-continuing rotary motion
  • F16H19/001—Gearings comprising essentially only toothed gears or friction members and not capable of conveying indefinitely-continuing rotary motion for conveying reciprocating or limited rotary motion
  • F16H19/003—Gearings comprising essentially only toothed gears or friction members and not capable of conveying indefinitely-continuing rotary motion for conveying reciprocating or limited rotary motion comprising a flexible member
  • F16H19/006—Gearings comprising essentially only toothed gears or friction members and not capable of conveying indefinitely-continuing rotary motion for conveying reciprocating or limited rotary motion comprising a flexible member for converting reciprocating into an other reciprocating motion
• • D—TEXTILES; PAPER
  • D03—WEAVING
  • D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
  • D03C1/00—Dobbies
  • D03C1/14—Features common to dobbies of different types
• • D—TEXTILES; PAPER
  • D03—WEAVING
  • D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
  • D03C1/00—Dobbies
  • D03C1/14—Features common to dobbies of different types
  • D03C1/144—Features common to dobbies of different types linking to the heald frame

Definitions

• the invention relates to a device for transmitting movements and forces, in particular in dobby looms, according to the preamble of patent claim 1.
• the invention relates to a planar gear unit for transmitting linear movements and forces from a first direction of movement to a second direction of movement or for converting a pivoting movement into a linear movement.
• Used deflection levers which are rotatably mounted about an axis and have at least a first and a second lever arm arranged at an angle to one another. At least one
• Lever arm is hinged to a linearly movable element, while the other lever arm is connected to a drive means.
• the object of the invention is to provide a device for transmitting movements and forces, which the pivoting movement of a bell crank with little friction loss and little wear in one implements linear motion.
• the device is said to be particularly suitable for use in dobby looms.
• At least one of the lever arms of the deflection lever is connected to the linearly movable element by means of a first and a second flexible band, the two bands being arranged and fastened in such a way that only one of the bands is always subjected to a tensile force.
• connection is free of play and is not subject to ongoing maintenance, e.g. is the case with a rolling bearing connection.
• both lever arms can be connected to a linearly movable element, the first lever arm being connected to the first element by means of a first and a second flexible band and the second lever arm being connected to the second element by means of a first and a second flexible band.
• Each lever arm advantageously has an end piece with a substantially circular arc-shaped rolling surface on which the strips roll, one end of the first band being attached to a suitable location on the end piece and one end of the second band being attached to another suitable location on the end piece, the Bands intersect and the other ends of the bands are connected to the associated element. Depending on the direction of movement of the elements one band is under tension while the other band is unloaded.
• the strips are arranged one inside the other so that they intersect each other.
• the first band is wider than the second band, the first band having a slot which extends over a large part of its length and whose width is greater than the width of the second band.
• the tapes run crosswise into one another, so that there is great guidance stability of the connected element.
• the strips can be arranged next to one another. Both bands are of the same width.
• the tapes can be made of any suitable, flexible and resilient material, such as made of steel, plastic or textile material. A combination of these materials for the production of the flexible tapes is also conceivable.
• Figure 1 is a side view of the device according to the invention.
• Figure 2 is a side view of a tape;
• Figure 3 a plan view of the first band;
• Figure 4 a plan view of the second band
• FIG. 1 shows the device according to the invention, which is based on a deflection lever 1, as is known, for example, for deflecting movements and forces for heald frames in dobby looms.
• the deflection lever 1 comprises two lever arms 2 and 3 arranged at an angle to one another, via which the movements and forces are carried in and out.
• the bell crank 1 is pivotally mounted about an axis 5 by means of a bearing 4.
• the bell crank can also have a further bearing 6 for the force input.
• the lever arms 2 and 3 each include an end piece 7 and 8.
• the end pieces 7, 8 each have an arc-shaped rolling surface 9, 10.
• Crossing bands 11, 12 and 13, 14 are fastened to the ends of the rolling surfaces 9, 10 by anchoring one end of each band 11-14 to the end piece 7 and 8 by means of a fastening 15 and 16, respectively.
• the bands 11-14 are preferably made of spring steel, but can also be made of plastic or textile material.
• the free ends of the bands 11, 12 and 13, 14 are each operatively connected to a linearly movable element. Through these elements, the force input or Kraftaustrag. This is explained in more detail below.
• Figures 2 to 4 show the tapes in detail.
• Figure 2 shows the shape of the bands 11-14 seen from the side.
• the strips can be preformed in such a way that they correspond to the shape of the rolling surfaces 9, 10 of the end pieces 7, 8.
• the bands can also be straight and undeformed.
• FIG. 3 shows a plan view of the first band 11 or 13.
• the band preferably has a rectangular cross section and comprises a slot 17 which extends over a large part of the band length.
• the second band 12 or 14 is narrower than the first band 11 or 13.
• the width of the second band 12 or 14 is somewhat smaller than the width of the slot 17 of the first band 11 or 13 and can thus be guided through the slot 17, with the crossing arrangement of the bands 11, 12 and 13, 14, as shown in Figure 1.
• Figures 5 to 7 show the device according to the invention in use for the shaft drive of a shaft loom. Different states of motion are shown.
• Two deflection levers 1a, 1b which are pivotably arranged on the machine frame (not shown) are connected to one another via a push-pull rod 18.
• the force is input via the bearing 6 of the right bell crank 1 a, the bell crank 1 a pivoting movement in the direction of the double arrow 28.
• the bands 13, 14 of the lever arm 3 are fastened to the push-pull rod 18 by means of fastenings 21, 22.
• a clamping device 23 can be provided at the end of the push-pull rod 18 for clamping the bands 13, 14.
• the tapes 13, 14 transmit the
• the belts 13, 14 perform a rolling motion on the rolling surface of the lever arm 3, the rolling point 31 remaining fixed on an imaginary axis 29, while the rolling surface 10 of the lever arm 3 moves under the rolling point 31. Because the rolling point 31 does not change, the pivoting movement of the deflection lever 1a is converted into a purely linear movement of the push-pull rod 18.
• the other lever arm 2 of the deflection lever 1 a is also connected via bands 11, 12 to a push-pull rod 20, which drives the shaft of the dobby loom and is connected to the latter via a shaft coupling 25.
• the pivoting movement of the lever arm 2 is converted into a linear movement of the push-pull rod 20 in the direction of the double arrow 27.
• the rolling point 32 see FIG. 6, also remains firmly on an imaginary axis 30, while the rolling surface 9 of the lever arm 2 moves under the rolling point 32.
• the push-pull rod 18 transfers the movement to the second, left bell crank 1b, which is also connected to the push-pull rod 18 by means of straps.
• the deflection lever 1b is pivoted in the direction of the double arrow 28 and transmits this movement to a further push-pull rod 19 which is connected to the weaving machine shaft via a shaft coupling 24.
• the power transmission between the deflection lever 1 b and the push-pull rod 19 also takes place here by means of belts, the push-pull rod 19 being moved linearly in the direction of the double arrow 27.
• An oscillating pivoting movement of the deflection lever is thus advantageously transmitted as a purely linear movement to corresponding movable elements, which is achieved by using and arranging the flexible bands 11, 12 and 13, 14 according to the invention.

Landscapes

• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Looms (AREA)
• Transmission Devices (AREA)

Priority Applications (3)

Applications Claiming Priority (2)

Publications (2)

Family

ID=7687147

Family Applications (1)

Country Status (8)

Families Citing this family (2)

Citations (8)

Family Cites Families (9)

• 2001
  • 2001-06-02 DE DE10127098A patent/DE10127098C1/de not_active Expired - Fee Related
• 2002
  • 2002-05-25 CZ CZ20033567A patent/CZ20033567A3/cs unknown
  • 2002-05-25 EP EP02745092A patent/EP1392902A2/de not_active Withdrawn
  • 2002-05-25 US US10/479,499 patent/US20040168736A1/en not_active Abandoned
  • 2002-05-25 RU RU2003137528/12A patent/RU2260638C2/ru not_active IP Right Cessation
  • 2002-05-25 CN CNA028111753A patent/CN1514894A/zh active Pending
  • 2002-05-25 WO PCT/DE2002/001935 patent/WO2002099171A2/de not_active Application Discontinuation
  • 2002-05-25 JP JP2003502273A patent/JP2004519567A/ja active Pending

Patent Citations (8)

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