Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
  • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
  • B29C45/14311—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles using means for bonding the coating to the articles
• • 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
  • F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
  • F16H55/02—Toothed members; Worms
  • F16H55/06—Use of materials; Use of treatments of toothed members or worms to affect their intrinsic material properties
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
  • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
  • B29C45/14778—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles the article consisting of a material with particular properties, e.g. porous, brittle
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
  • B29K2705/00—Use of metals, their alloys or their compounds, for preformed parts, e.g. for inserts
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
  • B29L2015/00—Gear wheels or similar articles with grooves or projections, e.g. control knobs
  • B29L2015/003—Gears

Definitions

• the invention relates to a drive wheel in internal combustion engines for control purposes and low power transmission, consisting of a hub with a molded disk part, on the outer circumference of which a chain, a toothed belt or a gear profile is arranged.
• Drive wheels of this type are used in particular in automobile construction in the internal combustion engines used there, for example for producing a power transmission from the crankshaft to the camshaft, but also for other control purposes, with a low power transmission being required from these drive wheels.
• such drive wheels have been made from plastic, from sintered metal or from solid material, the hub being made of steel or extruded aluminum.
• the entire part is made of heat-resistant plastic.
• the drive wheel consists of the actual hub part, to which then adjoins a disk part extending in the radial direction, which has the required profile on its outer circumference.
• these known designs have not proven themselves since the plastic expands radially when heated and the circumference is thus enlarged. At high speeds there is an increase in the radial direction_ due to the centrifugal forces that occur.
• the main disadvantage is that the profile of the
• REPLACEMENT LEAF Wheel changes and thus the accuracy of the power transmission is impaired. In addition there are extremely undesirable changes in the belt or chain tension and the rotation angle transmission.
• the invention has for its object to design such a drive wheel so that the profile remains almost constant at all temperatures and speeds.
• a coherent metal frame is provided in the area of the hub of the disk part and the profile part, which is encapsulated on all sides with a plastic jacket.
• An advantageous embodiment is that a hub ring is formed on the metal frame, which has a groove.
• a correspondingly shaped support ring is arranged on the hub ring.
• An advantageous embodiment provides that in the area of the hub on one end face the hub ring connected to the metal frame forms a contact shoulder and that on the other end face the metal frame has a projection which is flush with the end face of the hub ring.
• the metal frame be provided with holes that cover up to about 70% of the surface.
• the hub can also be designed particularly advantageously, so that a good non-positive connection with the shaft is ensured, the axial contact force being improved.
• FIG. 5 shows a side view according to FIG. 4 in a partial view
• Fig. 6 is a view of the wheel with a gear profile.
• the drive wheel shown in FIG. 1 has a hub part 2 with which it is plugged onto a shaft 16.
• This hub part 2 is followed by a disk part 17, which is arranged radially to the shaft 16 and which merges on its outer circumference into a profile part 6, on which a chain profile 9, a toothed belt profile 13 or a Zahnrad ⁇ profile 15 is arranged.
• An essential component of the drive wheel is a correspondingly shaped metal frame 1, which is preferably made of steel and which has in the area of the hub 2 a leg 18 running in the axial direction of the shaft 16, which then merges into a radially extending disk part 19 and in the region of the profile part 6 there is a collar 7, which in turn extends in the axial direction of the shaft 16.
• This steel frame 1 is provided with a plastic jacket 3. For better anchoring of the plastic with the steel frame 1, this is provided with holes 8 over its entire surface, these holes covering 8 to about 10% of the area.
• a hub ring 11 molded a hub ring 11, e.g. by welding, which abuts a shaft shoulder of the shaft 16.
• the metal frame 1 On the other end face of the hub 2, the metal frame 1 is provided with a projection 12 which is flush with the hub ring 11, with the drive wheel being axially braced on the shaft 16 with the aid of a disk 20 and a screw 21.
• the hub ring is used to hold a spring on the stub shaft
• I I provided with a groove 4, wherein, for reinforcement, i.
• an open or closed support ring 5 is pushed over the hub ring 11, which ends flush on both contact surfaces in the area of the hub 2, so that a frictional connection is created when the hub is clamped.
• This support ring 5 is provided with a corresponding opening 10 (Fig. 2).
• a lateral toothed belt guide 14 is advantageously provided.
• it can also consist of two rectangular rings which are embedded in a groove (not shown here).
• the guide can also be provided only on one side.

Landscapes

• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Physics & Mathematics (AREA)
• Electromagnetism (AREA)
• Thermal Sciences (AREA)
• Manufacturing & Machinery (AREA)
• Pulleys (AREA)
• Gears, Cams (AREA)
• Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=6279218

Family Applications (1)

Country Status (2)

Cited By (1)

Families Citing this family (7)

Citations (4)

Family Cites Families (3)

• 1985
  • 1985-08-23 DE DE19853530190 patent/DE3530190A1/de active Granted
• 1986
  • 1986-08-21 WO PCT/EP1986/000491 patent/WO1987001168A1/de unknown

Patent Citations (4)

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