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
  • F16H7/00—Gearings for conveying rotary motion by endless flexible members
  • F16H7/08—Means for varying tension of belts, ropes or chains 
• • 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
  • F16H7/00—Gearings for conveying rotary motion by endless flexible members
  • F16H7/08—Means for varying tension of belts, ropes or chains 
  • F16H2007/0802—Actuators for final output members
  • F16H2007/0806—Compression coil springs
• • 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
  • F16H7/00—Gearings for conveying rotary motion by endless flexible members
  • F16H7/08—Means for varying tension of belts, ropes or chains 
  • F16H2007/0802—Actuators for final output members
  • F16H2007/0812—Fluid pressure

Definitions

• the invention relates to a tensioning rail for a chain drive with a pivotable about a pivot support body having a contactable with a chain guide channel and a clamping piston druckbeaufschlagbaren Aufdschreib Kunststoff, wherein the Aufdschreib Scheme bridges the guide channel at least partially by forming a closed at the circumference guide channel section.
• DE 202004013921 U1 discloses a tensioning rail for a chain drive, wherein the tensioning rail has a guide channel.
• the guide channel is designed so open that a chain can be easily guided past the two opposite flanks of the clamping rail and is in contact with a sliding lining body, which is mounted on the underside of the guide channel.
• a pressure piece with a press-on area is clipped onto the two flanks of the guide channel so that the pressure piece bridges the guide channel.
• a clamping piston presses on the push-on area.
• Slide rails are used in chain drives, especially in timing chain drives, for internal combustion engines.
• the timing chains connect crankshafts and camshafts with each other.
• the timing chains are sufficiently tensioned to prevent slippage of attached to the camshaft and the crankshaft gears, the timing chain is stretched over a tensioning rail.
• Sliding rails have a wide variety of shapes.
• slide rails are concerned, which have a guide channel for the timing chain, which is arranged between the Aufdgur Siemens and a pivot point about which the clamping rail pivots during clamping.
• Slide rails are known, for example, from US Pat. No. 4,742,299, DE 4341019 A1, US Pat. No. 4,742,299, DE 19713824 A1, DE 19713824 A1, US Pat. No. 4,530,681 and JP 2005/105147 A.
• the known slide rails have disadvantages in the introduction of force and power, since the currently known clamping rail is not so robust can be configured.
• an additional component must be applied after mounting the clamping rail in the motor on the clamping rail to form a contact surface for a clamping piston, so that via introduction of pressure, which is applied by the clamping piston, done on the Aufdrück Symposium the clamping rail pivoting of the clamping rail can and the desired voltage in the timing chain is achieved.
• the Aufdschreib Scheme is designed in one piece with the support body. Under a one-piece design is understood to be a molding of both the Aufdschreib Maschinens and the remaining region of the clamping rail of a single component. This includes both an adhesion as well as the presence of one and the same material in the tensioning rail, in particular in the pressing area and in the remaining part of the tensioning rail.
• the clamping rail is more resilient. It can be better tolerated both an increased chain tension of the clamping rail, as well as a higher pressure on the Aufdschreib Scheme be introduced via the clamping piston on the timing chain.
• the inventive design a kit consisting of clamping rail with Aufdschreib MaschinenS and threaded into the tensioning rail chain can be installed in the engine.
• This new clamping rail replaces conventional slide rails and conventional separate pressure pads.
• a pre-assembly of timing chain and inventive clamping rail lends itself to. Assembly times are reduced and costs are reduced. The force is applied to the rail via a cohesive component. In contrast to previously known two-part solutions no adjustment of tolerances is required to obtain a backlash-free connection. Over the entire life advantageously no play between the Aufdschreib Siemens and the tensioning rail body.
• the versatile design possibilities of injection molded and die-cast parts are retained in order to take account of the requirements of the engine.
• a guide channel can be sprayed, through which the open timing chain can be threaded. After inserting the kit of tensioning rail and timing chain, the timing chain is closed and then stretched over the tensioning piston.
• the pressing-on area is arranged in the half remote from the fulcrum, preferably in the third of the tensioning rail remote from the fulcrum.
• the pressure acting on the timing chain, which are introduced via the tensioning piston, are sufficiently large to achieve a necessary chain tension, which ensures that the timing chain does not jump off the sprockets on crankshaft and camshaft.
• a maintenance-free clamping rail and a fail-safe operation of the engine is the result.
• the pressing area is reinforced in a pressure-absorbing manner.
• the special force profiles are distributed particularly well in the embodiment when pressure is applied in the tensioning rail.
• a sliding lining body is arranged, on which the chain is slidable.
• the shortest distance of the clamping-piston-side end of the pressing-on area from the sliding-covering body surface is between approximately six and eight times the thickness of the sliding-lining body, preferably seven times, then a further advantageous embodiment arises.
• the cross section of the guide channel is then large enough that a timing chain with the necessary clearance running through the tensioning rail, while maintaining the smallest possible dimensions to allow the installation of such a tensioning rail according to the invention in as many engines.
• the height of the guide channel in the region of the closed guide channel section between the 1, 2 and 2.1 preferably 1, 8 times the width of the guide channel, so a particularly optimized width / height ratio of the clamping rail is the result.
• a top side of a track that can be inserted into the guide channel and the sliding track surface are removed between the surface of the sliding lining body surface. Near the surface of the body surface near the guide channel section bridging the guide channel, there is a distance of approximately 0.2 to 1.0 of the guide channel width.
• a particularly advantageous tensioning rail is in a further advantageous embodiment, when the pressing area comprises a steel support which is integral with the support body. If such a steel support is introduced on the outer side of the projection in the region of the Aufdschreib Maschinens on the surface, the wear resistance of the clamping rail is increased since shocks of the pressing on the Aufdschreib Scheme piston can be compensated wear. However, other metal inserts are also recoverable. In the following an embodiment will be explained in more detail with reference to a drawing. Show it:
• 1 is a schematic plan view of a tensioning rail with an indicated tensioning chain and a clamping piston pressing on a pressing area of the tensioning rail
• Fig. 2 is an isolated perspective view of the clamping rail according to the invention of Figure 1, and
• FIGS. 1 and 2 shows a perspective detailed view of the pressing region of the tensioning rail from FIGS. 1 and 2.
• FIG. 1 shows a tensioning rail 1 made of injection-moldable material.
• the tensioning rail 1 has a pivot point 2.
• the tensioning rail 1 is designed to be convex on the control chain side. On the tax chain remote side, the clamping rail 1 is concave.
• the timing chain is provided with the reference numeral 3.
• the tensioning rail has a supporting body 4, on which a pressing area 5 is formed.
• the embarkdschreib Scheme 5 is part of a projection 6.
• the timing chain 3 extends between the pivot point 2 and the Aufdschreib Scheme 5 of the projection 6.
• the Aufdschreib Scheme 5 is made in one piece from the same material as the support body 4 of the clamping rail 1.
• the tensioning rail 1 is injection molded.
• the Aufdschreib Scheme 5 of the projection 6 forms a control chain 3 bridging area.
• the pivot point 2 is the center of a sliding bush, which is incorporated in the tensioning rail 1, in the supporting body 4.
• the guide channel 7 may have any U- or even L-shaped configuration.
• the support body 4 is designed such that it has two spaced webs 9 along a convexly curved surface.
• the webs 9 of the support body 4 go on both sides of the running therebetween timing chain 3 in the projection 6, which forms the Aufdgur Scheme 5.
• the webs 9 of the supporting body 4 bridge together the timing chain 3.
• the timing chain 3 must be threaded through the guide channel 7 and under the guide channel of the section 8 in the opened state.
• On the fulcrum side of the guide channel 7, a sliding bearing body 10 is clipped.
• the sliding lining body 10 has at both ends projections which are clipped to the ends of the supporting body 4 of the clamping rail 1.
• timing chain 3 If the timing chain 3 is inserted into the guide channel 7, it slides in the operating state on the surface of the Gleitbelag stresses 10.
• a clamping piston 11 is fixed on the motor side and presses with a movable cylinder on the Aufdschreib Scheme 5. Presses the clamping piston 11 increasingly on the Aufdschreib Scheme 5, so turns In Figure 1, the support body 4 rotates, as soon as increased pressures on the clamping piston 11 are exerted on the projection 6 and the printing area 5 integrated therewith, in the counterclockwise direction the fulcrum 2.
• the tensioning rail 1 is produced by injection molding from one piece, wherein the support body 4 webs 9, which form a projection 6, which then has a Aufdschreib Scheme 5. This area also identifies the guide channel section 8, which bridges the guide channel 7.
• the outside of the webs 9 is designed trussed like a truss.
• the projection 6 is configured trussed like a lattice and has depressions 12.
• a sliding lining body 10 is clipped into the guide channel 7.
• the timing chain 3 is then passed through the guide channel 7 in the open state. Both the tensioning rail 1 and the inserted, still open, timing chain 3 is spent in the engine and placed around the sprockets of the camshaft and crankshaft. Then the timing chain is closed.
• a built-in clamping piston 11 then presses, in particular during operation of the motor, on the Aufdschreib Maschinen 5 and tensioned by a deflection of the tensioning rail 1 about the pivot point 2, the timing chain 3rd

Landscapes

• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)

Priority Applications (6)

Applications Claiming Priority (2)

Publications (1)

Family

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Family Applications (1)

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Citations (4)

Family Cites Families (22)

• 2006
  • 2006-08-23 DE DE202006012966U patent/DE202006012966U1/de not_active Expired - Lifetime
• 2007
  • 2007-05-16 DE DE502007004425T patent/DE502007004425D1/de active Active
  • 2007-05-16 CN CN2007800395127A patent/CN101529121B/zh active Active
  • 2007-05-16 JP JP2009524908A patent/JP5057486B2/ja active Active
  • 2007-05-16 WO PCT/EP2007/004405 patent/WO2008022663A1/de not_active Ceased
  • 2007-05-16 DE DE202007019176U patent/DE202007019176U1/de not_active Expired - Lifetime
  • 2007-05-16 EP EP07725320A patent/EP2066920B1/de active Active
  • 2007-05-16 US US12/438,166 patent/US8475307B2/en active Active

Patent Citations (4)

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