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
  • F16H31/00—Other gearings with freewheeling members or other intermittently driving members
  • F16H31/003—Step-by-step mechanisms for rotary motion
  • F16H31/004—Step-by-step mechanisms for rotary motion with pawls driven by a rotary cam
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
  • A61L9/00—Disinfection, sterilisation or deodorisation of air
  • A61L9/015—Disinfection, sterilisation or deodorisation of air using gaseous or vaporous substances, e.g. ozone
  • A61L9/04—Disinfection, sterilisation or deodorisation of air using gaseous or vaporous substances, e.g. ozone using substances evaporated in the air without heating
  • A61L9/12—Apparatus, e.g. holders, therefor
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F24—HEATING; RANGES; VENTILATING
  • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
  • F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
  • F24F8/50—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by odorisation
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T74/00—Machine element or mechanism
  • Y10T74/19—Gearing
  • Y10T74/19642—Directly cooperating gears
  • Y10T74/19698—Spiral
  • Y10T74/19828—Worm

Definitions

• the invention relates to a drive for a rotating object according to the preamble of claim 1.
• Such a drive has already become known through the European laid-open specification EP 083 8610 A2.
• the centerpiece of this drive is at least one pivotally mounted lever which interacts with a gear wheel which is connected to the rotating object in a rotationally fixed manner.
• a device for mounting and guiding the lever for a forward movement of the lever which engages and entrains the gearwheel.
• This drive has the advantage that it is essentially insensitive to contamination caused by a liquid in which rollers, shafts or the like rotate in an air humidifying and cleaning device, a fragrance evaporator or the like. Because even if the gearwheel is wetted by the rotational movement in the liquid, the only point of contact with the other gear components is that Part of the lever that engages the gear. However, this part of the lever is usually easy to clean.
• a disadvantage of this mechanism is that, in particular due to the occurrence of manufacturing tolerances of the drive parts, a smooth, low-noise running of the rotating object is sometimes impaired, since in particular the engaged lever can get caught on the gearwheel.
• the invention has for its object to provide a drive which has improved synchronism and in particular is less sensitive to manufacturing tolerances.
• the invention is based on a drive for a rotating object for a roller, shaft, plate or the like, in particular for a fragrance evaporator, an air humidifier or an air cleaning device or the like, which has the following features:
• a movably mounted lever a gear wheel which is connected in a rotationally fixed manner to the rotating object, and a lever mechanism for a movement of the lever engaging and entraining in the gear wheel for rotating the gear wheel, the lever having a tip for engaging the teeth of the gear wheel.
• the main idea of the invention is that the tip is in the form of a tooth, the shape of this tooth and that of the teeth of the gear and the lever gear are matched to one another in such a way that the tooth flanks of the tooth on the at least one lever and of the tooth in engagement in each case on the gearwheel roll on one another during the entraining movement.
• the shape of the tooth on the lever and that of the teeth of the gear wheel and the lever gear are matched to one another in such a way that the tooth flanks of the tooth on at least one lever and the one in engagement Tooth on the gear during the entraining movement have a point of contact in which the flanks roll on each other without radial sliding (pitch point).
• the shape of the tooth on the lever and that of the teeth on the gear according to the rules of the toothing as involute, cycloid, circular or toothed rack toothing, in which the tooth on the lever e.g. has the shape of a pin, trained.
• the tooth on the lever e.g. has the shape of a pin, trained.
• the lever mechanism for guiding the lever includes guide surfaces for the lever.
• the lever can, for example, perform a forward movement, a backward movement and a pivoting movement.
• the lever gear comprises an eccentric drive for the lever.
• a desired coupling curve can be achieved for the cyclical engagement of the tooth-shaped tip of the at least one lever by a correspondingly coordinated geometric arrangement of the articulation points of the lever and the guide surfaces on the lever gear housing.
• the functional principle of the crank loop can also be used in another embodiment, in which the longitudinal guide is located in the lever, in which, for example, a pin fixed in the lever mechanism housing engages.
• a simple eccentric drive it is further proposed that it have a drive shaft for the lever, which is arranged eccentrically on a gearwheel.
• the gear wheel can be driven continuously, preferably with the help of a worm.
• extreme translations are possible as a result, which is particularly necessary when used in a fragrance evaporator or air washer according to the invention, where only one motor is used to directly drive the fan and drive one or two stack of plates.
• a worm gear is a so-called self-locking gear, whereby the at least one lever is blocked against unwanted movement.
• the drive shaft is mounted directly eccentrically on a gear wheel which is driven by a worm.
• the worm is preferably connected to the drive shaft of a motor via an elastic coupling.
• the drive shaft need not be completely in line with the worm shaft. Larger tolerances in the production of a drive according to the invention are possible here, which among other things results in cost savings.
• two, three or more levers are provided which alternately engage the gearwheel.
• the levers are locked against unwanted movement by a worm gear, and that the rotating object is also secured against any undesired further movement, for example against turning back, by at least one lever in engagement.
• the rotation of the rotating object is thus permanently mechanically controlled by the lever drive.
• the at least one lever is mounted elastically between the guide surfaces of the lever mechanism.
• the lever is preloaded in the lever gear and has no play, even with manufacturing tolerances. Too much play could, in the worst case, cause the tooth of an engaging lever to collide with a tooth of the gear or the teeth to get caught.
• At least part of the outer contour of the guide surfaces Lever is resilient.
• the outer contour is designed as a narrow frame.
• this contour area has resilient properties.
• the frame is interrupted, a spring element being inserted into the interruption point.
• the area of the outer edge of the lever is not elastically flexible, which is supported on a guide surface of the lever gear for receiving the essential force for further movement of the gear.
• FIG. 1 is a side view of two stacked plate stacks of an air humidifying device, each with drives according to the invention arranged thereon, in a schematic side view,
• FIG. 2a-e shows a detail of a drive according to the invention according to FIG. 1 in a schematic cross section for different lever positions
• 3a-c a lever according to the invention in two plan views with and without spring element and a side view
• FIGS. 3a to c shows a worm wheel with an eccentrically arranged drive shaft for a lever according to FIGS. 3a to c in a schematic table top view
• Fig. 5a shows a section of an inventive
• FIG. 5b shows a drive according to the invention according to FIG. 5a in longitudinal section.
• FIG. 1 two parallel stacked plates 1, 2 of an air humidification device with drives 3 according to the invention arranged thereon are shown in a schematic side view.
• the plate stack 1, 2 exist z. B. from lamellar circular discs arranged one behind the other.
• the plate stacks 1, 2 are normally stored in the air washer on a trough (not shown) in which there is usually water, possibly with an additive, into which the plate stacks are immersed when they are rotated about axes 4, 5.
• a housing cover on the z. B. a fan with a drive motor is arranged, which is connected via an elastic coupling 6 with the two drives 3 according to the invention.
• 2a of the drive 3 according to the invention is enlarged in sections and shown in the sectional view for different lever positions.
• the lever gear 7 which interacts with a ring gear 8 which is arranged on the end face of the plate stack 1.
• the lever gear 7 is an arrangement with two drive levers 9, 10.
• the drive levers 9, 10 each have a tooth-shaped tip 11, 12 and a receiving opening 13, 14 (see also FIGS. 3a and b) for two drive pins each 15, 16.
• the drive pins 15, 16 are eccentrically offset by 180 ° on the two end faces of a worm wheel 17 and thus form an eccentric bearing seat for the drive levers 9, 10 plugged thereon via the receiving openings 13, 14.
• the worm wheel 17 has an axis of rotation 18, which is mounted in the housing of the lever gear 7 and is in engagement with a worm 19.
• the worm 19 is connected via the elastic coupling 6 to, for example, a drive motor, not shown.
• a drive motor not shown.
• the drive levers 9, 10 are moved or pivoted back and forth in the housing of the lever gear 7 via the eccentric bearing seat 13, 14, 15, 16.
• the outer contour of the drive levers 9, 10 bears against guide surfaces 20, 21 of the housing of the lever mechanism 7.
• the front drive lever 10 (shown in solid lines) engages with the toothing of the ring gear 8, while the second drive lever 9 arranged behind it (shown in dashed lines) is completely withdrawn from the toothing of the ring gear 8.
• the desired movement of the tooth-shaped tips 11, 12 of the drive levers 9, 10 essentially results from the geometric distances between the eccentrically arranged drive pins 15, 16 and the shape and the Distance between the guide surfaces 20, 21.
• the path curve of the tooth-shaped tips 11, 12 is a coupling curve of the thrust crank drive thus implemented.
• FIGS. 2a to e The movement of the drive levers 9, 10 to achieve a rotary movement of the ring gear 8 arranged on the plate stack 1 in the direction of the arrow is shown in different angular positions of the worm wheel 17 in FIGS. 2a to e.
• Each figure corresponds to a state of the lever position for a rotation of the worm wheel 17 by 45 °. That 2e shows a rotation through 180 °, provided that FIG. 2a is set at 0 °.
• teeth 22 of the ring gear 8 and the tooth-shaped tip 11, 12 is designed such that the interlocking teeth implement a cycloid toothing, for example.
• the movement of the drive levers 9, 10 is coordinated by the eccentric bearing and the guide surfaces on the housing of the lever gear so that the tooth flanks roll on one another.
• FIGS. 3a to c show the drive lever 10 again in detail as an example.
• the outer contour of the drive lever 10 is formed over a large area on one side as a narrow frame 23.
• the frame 23 is interrupted and has receiving pins 24 for a compression spring 25 (only shown in FIG. 3a).
• the front area of the drive lever 10 is elastically flexible on this side. This makes it possible to insert the drive lever 10 or the drive lever 9 of the same design with pretension into the housing of the lever mechanism 7.
• This is preferably the side that absorbs the essential forces for the further movement of the gear.
• the worm wheel 17 is again shown as a detail with the drive pins 15, 16 arranged eccentrically offset on both end faces by 180 °. As already mentioned above, the worm wheel 17 is supported via bearing axles 18 which protrude from the eccentrically arranged drive shafts 15, 16.
• the tips 11, 12 of the drive levers 9, 10 are directed downward downward, so that liquid which is conveyed by the immersion of the ring gear 8 in a liquid bath to the lever tips 11, 12, down again Sprocket 8 expires.
• the only places that can come into contact with the liquid in the bath are only the tooth-shaped tips 11, 12 of the drive levers 9, 10. There is therefore no risk that the remaining components of the drive will be involved in any phase of the operation of the device come into contact with the bath liquid.
• the layman can dismantle the device for cleaning work in a simple manner, since with the removal of the cover (not shown) there are only the stack of plates 1, 2 in the tub (not shown).
• the drive shown for a plate stack 1, 2 can also be used outside of an air humidification device according to the invention.
• the system shown can be readily applied to any rotating object in which a drive system according to the invention offers advantages. This can be the case, in particular, in chemical production plants, where rolls, drums, heat exchangers or the like also frequently have to rotate within a liquid bath, and thus likewise The problem is that the drive must not come into contact with the aggressive liquid, if at all.
• the drive principle according to the invention can also be used advantageously if a very large transmission ratio between the drive shaft and the rotating object can be achieved.
• FIG. 5a and b show a variant of a drive according to the invention, in which three drive levers 26, 27, 28 are used instead of two drive levers.
• drive pins on a worm wheel 29 are not offset eccentrically by 180 ° but by 120 °.
• This embodiment which is shown in FIG. 5b to illustrate the position of the drive levers 26, 27, 28 in longitudinal section, enables an even better synchronization to be achieved.

Landscapes

• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Health & Medical Sciences (AREA)
• Mechanical Engineering (AREA)
• Public Health (AREA)
• Life Sciences & Earth Sciences (AREA)
• Animal Behavior & Ethology (AREA)
• General Health & Medical Sciences (AREA)
• Epidemiology (AREA)
• Veterinary Medicine (AREA)
• Combustion & Propulsion (AREA)
• Chemical & Material Sciences (AREA)
• Transmission Devices (AREA)
• Rollers For Roller Conveyors For Transfer (AREA)
• Rolls And Other Rotary Bodies (AREA)
• General Details Of Gearings (AREA)
• Preliminary Treatment Of Fibers (AREA)
• Disinfection, Sterilisation Or Deodorisation Of Air (AREA)
• Gear Transmission (AREA)

Priority Applications (6)

Applications Claiming Priority (2)

Publications (1)

Family

ID=22833425

Family Applications (1)

Country Status (10)

Cited By (4)

Families Citing this family (3)

Citations (3)

Family Cites Families (8)

• 1998
  • 1998-12-29 US US09/222,726 patent/US6318203B1/en not_active Expired - Lifetime
• 1999
  • 1999-12-02 DE DE19958078A patent/DE19958078A1/de not_active Withdrawn
  • 1999-12-29 AT AT99959636T patent/ATE246321T1/de not_active IP Right Cessation
  • 1999-12-29 CN CN99815162A patent/CN1099534C/zh not_active Expired - Lifetime
  • 1999-12-29 DE DE59906459T patent/DE59906459D1/de not_active Expired - Lifetime
  • 1999-12-29 EP EP99959636A patent/EP1141583B1/de not_active Expired - Lifetime
  • 1999-12-29 KR KR1020017008255A patent/KR100646717B1/ko not_active Expired - Lifetime
  • 1999-12-29 CA CA002347672A patent/CA2347672C/en not_active Expired - Fee Related
  • 1999-12-29 WO PCT/IB1999/002063 patent/WO2000039485A1/de not_active Ceased
  • 1999-12-29 JP JP2000591349A patent/JP4540852B2/ja not_active Expired - Lifetime
• 2001
  • 2001-03-07 NO NO20011145A patent/NO320077B1/no unknown

Patent Citations (3)

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