DE202021001352U1 - Double polygon chain - Google Patents

Abstract

The double polygon chain is characterized in that it acts like the cross link chain, the links are similar to a double T profile but are pivotably connected on both sides with bolts and universal joints offset at right angles.

Description

State of the art:

The cross link chain (utility model 202020002744) can be manufactured very imprecisely and the links are very abrasive. The split cross link chain is only available for better production (utility model 202020003760). The form fit without wear is theoretically only available for the wheels without chain wear. Other chains can skip teeth when shifting or due to wear and tear during operation, which leads to major consequential damage to toothed belts and timing chains for valve control. In order to avoid this, the operating time is limited for the complex exchange. The positive three-tooth chain gear (patent 102017001344) runs out of round, as does the polygon gear for more stages (utility model 202020004853). Both are therefore only suitable for low speeds. In the case of the wheels of polygonal gears, the complete link divisions of the cross link chains also act as a support and replace the drivers. The form fit, however, only exists with deviations from the roundness.

Aim:

Polygonal gears with equilateral polygonal gears and the double polygonal chain should be operated positively with the slightest roundness deviations. The chain links should alternately rest on the outside and inside. Inner and outer links should be connected with bolts so that they are resistant to wear. Without a driver, 2 equilateral polygons with double pitch angles on the outside and inside should safely transfer steps. Sufficient wrapping as well as infeed and outfeed should ensure even chain run. For the right-angled gear function, the requirements should also be offset at right angles.

Solution:

The theoretical advantages of the cross link chain with different requirements are adapted for practical use with the double polygon chain and double polygonal wheels. ( 3 ). The chain links resemble a wide double T profile piece with universal joints on both sides. A cube connects the 3 or 4 bolts ( 5 ). The polygon gears wrap around 180 ° or more for safe transmission without a driver. In the polygon gear with double pitch angle, the sides protrude beyond the pitch length as a support. Without redirection there are equilateral polygons on both sides the same on the outside and an equal one offset by one division on the inside according to the chain links ( 1 and 2 ). With deflection there is a smaller, interlaced polygon in the middle of the wheel corresponding to the same chain links ( 3 ). Round mating gears without spacing cause the chain to be looped with a constant chain length and thus secure the chain support and entrainment. They only work directly with the corner spout. The position, diameter and the concave side of the link with the corresponding toothing also follow the partial rotation of the chain with a rotary movement ( 1 - 4th ). The interlocking between the supports causes the powerless entrainment and thus avoids friction. The polygonal gears produce an almost even chain movement with a center distance, even with the change of corner dimension and width across flats in opposite directions at the inlet and outlet ( 4th ). Right-angled or parallel power transmission is possible with pulleys or directly with polygonal wheels with the same chain links ( 3 ).

One simple application is the replacement of toothed belts and timing chains for valve control in internal combustion engines. ( 1 - 4th ) There is the double polygon chain without a right-angled deflection function with radially identical supports for wheels with polygons of the same size inside and outside ( 1 and 2 ).

Aa

Kettenauflage außen (und innen ohne Umlenkung bei 1 und 2)

Ai

Kettenauflage innen mit Umlenkung

R

Krümmung für Gegerad bei allen Auflagen

Designations too 3 :

Aa

Chain support outside (and inside without deflection at 1 and 2 )

Ai

Chain support inside with deflection

R.

Curvature for straight line in all editions

• Designations too 4th :

  S.

  Key-width

  E.

  Corner dimension

  VN

  Polygonal wheel for cam control

  G

  Counter gear

  (G)

  Counter gear optional

  VK

  Polygonal wheel for crank drive

• Designations too 5 :

  1

  Continuous bolts for 2 sides

  2

  Bolt on one side (also 2 times as a replacement for 1)

Claims (6)

The double polygon chain is characterized in that it acts like the cross link chain, the links are similar to a double T profile but are pivotably connected on both sides with bolts and universal joints offset at right angles. The double polygon chain after Claim 1 is characterized in that it is only a corresponding one by the support equal to the pitch length Polygonal wheel securely connects with half or more wrap. The double polygon chain after Claim 1 and 2 is characterized in that equilateral polygons with a double pitch angle on the outside and offset by a pitch angle on the inside are connected as a wheel for the complete division support. The double polygon chain after Claim 1 , 2 and 3 is characterized in that the rounded counter support and a round counter wheel with drivers between the supports lifts the wrench size for torque compensation. The double polygon chain after Claim 1 , 2 , 3 and 4th is characterized in that, without a right-angled deflection, a rectangular intermediate piece connects the double T-profiles with one bolt each with the same support on both sides. The double polygon chain after Claim 1 , 2 , 3 , 4th and 5 is characterized by the fact that without mating gears, polygon gears with a mutually alternating sequence of corner dimensions and width across flats come in and out with center distance and a slight oversize (less than half a pitch)

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