WO2009082261A1

WO2009082261A1 - Crossing double chain

Info

Publication number: WO2009082261A1
Application number: PCT/RU2008/000385
Authority: WO
Inventors: Viktor Vladimirovich Biletsky
Original assignee: Biletsky, Alexandr Vladimirovich
Priority date: 2007-12-21
Filing date: 2008-06-19
Publication date: 2009-07-02
Also published as: RU2007147196A; RU2382255C2

Abstract

The invention relates to mechanical engineering, in particular to driving chains. The inventive crossing double chain consists of links which are located at an angle to each other. Each link consists of several levels of supporting and connecting plates joined by pairs by two rows of pins. The outer and inner pins are arranged in two rows in a closed chain in such a way that the outer pins form the outer row and the inner pins form the inner row. Each level consists of two layers of connecting plates and one layer of supporting plates. On the lower layer, the outer pin row connects the external parts of the supporting and connecting plates, and the inner pin row connects the opposite lower parts of the supporting plates and the lower parts of right adjacent connecting plates. On the upper layer, the outer pin row connects the external parts of the supporting plates and the upper parts of the left adjacent connecting plates, wherein in the link, the layer of the supporting plates is disposed between the layers of the connecting plates. The aim of the invention is to reduce impact loads applied to the chain and the friction losses of the engagement of the chain with a gear.

Description

CROSS-DOUBLE CHAIN

The invention relates to mechanical engineering and can be used in chain drive and variator gears. β currently known directions for the development of drive chains. Such chains include drive sleeve chains, drive roller chains and drive gear (silent) chains and their various modifications. The main disadvantage of the known sleeve and drive roller chains is the impact nature of their pairing with the teeth of the sprocket, which reduces the efficiency of the chain drive as a whole and limits the operating speeds of the chains.

So, for example, a noise-free wear-resistant chain is known, consisting of rollers combined into a chain using bushings, which allow to increase the contact area of the chain elements, thus allowing the load to be transmitted through the inner and outer diameters of the sleeve in one plane (US 7056248 B2, 06.06.2006) .

The friction losses in the chain itself are lower than in other similar solutions, however, such a chain, like other silent chains, loses kinetic energy at the moment of collision

J chain link with sprocket tooth, which leads to lower efficiency of the chain drive as a whole. CVT chains are known which interact with pulley disks on the lateral surface of the plates or on the end surface of the fingers connecting the plates.

The main disadvantages of these chains are the impact nature of the pairing of the chain with the variator pulley disks as a whole and the small contact area of the chain with the pulley disks, which reduces the reliability and efficiency of the entire drive. Known chain belt used to reduce drive noise. In this design, the chain blocks are oval instead of round, which reduces the concentration of effort on the zone into which the load from the pulley of the chain belt is directed. The drive units are so designed that part of the units is located outside the drive, which leads to the effect of decreasing the relative speed (US 4936813, 06.26.1990). A disadvantage of this design is also the impact nature of the pairing of the chain with the variator pulley disks.

Closest to the claimed invention in design is a traction chain comprising main plates articulated by fingers and additional plates. Additional plates are connected to opposite ends by the same connection, and pivotally to adjacent ends. The main plates are mounted to each other at an angle of 0-90 ⁰ C. Under shock loads, articulated plates transfer forces to additional plates and twist the plates rigidly fastened with them (SU 1613747 A1, 12/15/1990). The disadvantage of this circuit is that when it comes into contact with an asterisk, part of the transmitted power is spent on twisting the circuit elements, which significantly reduces its efficiency and resource, and will also serve as an additional source of heating the circuit during operation. The objective of the claimed invention is the creation of such a circuit design that would eliminate the above disadvantages. The technical result achieved by the implementation of the invention is to reduce friction losses during coupling of a chain and an asterisk, to reduce shock loads experienced by a chain and an asterisk (pulley) during their coupling, as well as to increase the area of the contact spot of the chain with the surface of the conical pulley disk CVT.

The specified technical result is achieved in that the cross-double chain, containing the links located at an angle to each other, is made of at least one level of support and connecting plates pairwise connected by two rows of fingers, so that the outer row is on the lower tier of the link fingers connects the upper parts of the support and connecting plates, and the inner row of fingers - the opposite lower parts of the supporting plates and the lower parts of the adjacent connecting plates on the right, and on the upper tier of the link the outer row fell цевcev connects the upper parts of the support and upper parts of the left connecting plates on the left, and the inner row of fingers - the lower parts of the support and connecting plates, while in the link the tier of the supporting plates is located between the tiers of the connecting plates, the following condition being fulfilled: a (min) ² > c ² - b ² , where a is the distance between the axes of adjacent outer fingers (mm); C is the distance between the axes of the outer and inner fingers connected by a connecting plate (mm); b - the distance between the axes of the outer and inner fingers, United by a support plate (mm).

In a preferred embodiment, the chain, the connecting plate is made with a bend in the lower part, and the support plate is made with the expansion in the upper part. In addition, the fingers of the outer row can be longer than the fingers of the inner row, while the ends of the fingers are beveled and concave.

Each link may additionally contain cheeks, which can be made beveled and concave on the outer side surfaces. In another preferred embodiment, the cross-double chain is a variator.

The indicated technical result is also achieved by the fact that the cross-doubled circuit, containing the links located at an angle to each other, is made of at least one level of support and connecting plates pairwise connected by two rows of fingers, so that the outer layer on the lower tier a row of fingers connects the upper parts of the supporting and connecting plates, and the inner row of fingers - the opposite lower parts of the supporting plates and the lower parts of the adjacent connecting plates on the right, and on the subsequent tiers the outer p d fingers connects the upper part of the adjacent link plates and the inner row of pins - connecting the lower portions of adjacent plates offset by one plate, wherein the following condition is satisfied: a (min) ^2> c ² - b ² where a - the distance between the axes of adjacent outer fingers (mm); C is the distance between the axes of the outer and inner fingers connected by a connecting plate (mm); b - the distance between the axes of the outer and inner fingers, United by a support plate (mm).

In a preferred embodiment, the chain, the connecting plate is made with a bend in the lower part, and the support plate is made with the expansion in the upper part. In addition, the fingers of the outer row can be longer than the fingers of the inner row, while the ends of the fingers are beveled and concave. Each link may additionally contain cheeks, which can be made beveled and concave on the outer side surfaces.

In another preferred embodiment, the cross-double chain is a variator.

The invention is illustrated by drawings, where figure 1 shows a part of a cross-double chain; figure 2 - the shape of the base plates of the chain; in Fig.Z - the shape of the connecting plates of the chain; figure 4 - the interaction of the plates of the cross-double chain with asterisks; figure 5 is a diagram of the run-up of a cross-double chain on an asterisk; on figb is a cross section of a CVT cross-dual chain; figure 7 - shows part of a cross-double chain with cheeks; in FIG. 8 is a cross-sectional view of a CVT cross-chain with cheeks; Fig.9 is a view of B1-B1 of Fig.6; figure 10

view B2-B2 of FIG. 8; figure 11 - the interaction of the plates of the cross-dual variator chain with the disks of the conical pulleys.

The claimed cross-double chain consists of links located at an angle to each other. Each link consists of several levels of support 1 and connecting 2 plates pairwise connected by two rows of fingers. External 3 and internal 4 fingers are located in a closed chain in two rows, while the outer fingers 3 form the outer row, and the inner fingers 4, respectively, the inner row.

In one embodiment of the chain, each link level consists of two tiers of connecting plates 1 and one tier of support plates 2, so that on the lower tier of the link, the outer row of fingers 3 connects the outer parts 5 and 6 of the support 1 and connecting 2 plates, and the inner row of fingers 4 - opposite lower parts 7 of the support plates 1 and lower parts 8 of the right connecting plates, and on the upper tier of the link, the outer row of fingers 3 connects the outer parts 5 of the supporting plates and the upper parts 6 of the left connecting plates to the left, and the inside The lower row of fingers 4 is the lower parts of the supporting 7 and connecting 8 plates, while in the link the tier of the supporting plates 1 is located between the tiers of the connecting plates 2.

Figure 2 shows the support 1 plate, the outer part 5 of which is made with the expansion. The supporting plates 1 are assembled in a chain at the same level so that bordering the upper wider parts, they limit the minimum distance that the fingers 3 of the outer row can come together. The dimensions of the wider upper part of the supporting 1 plates are set so that the chain bend can only be one-sided and the condition is satisfied: a (min) ² > c ² - b ² , where a is the distance between the axes of the adjacent outer 3 fingers (mm); C is the distance between the axes of the outer 3 and inner 4 fingers connected by a connecting 2 plate (mm); b - the distance between the axes of the outer 3 and inner 4 fingers, United by the supporting 1 plate (mm).

According to the first embodiment of the circuit in each tier, the inclination of the connecting plates 2 with respect to each other is made in the same direction. Thus, a tight layout of the circuit is ensured. Figure 3 shows a connecting 2 plug-in, which is made with a bend on one σorona in the lower part in order to provide a larger angle at which the support plates 1 connected by it can be set in relation to each other, thus allowing the chain to cover the sprocket 9 (10) required radius. The device operates as follows.

The cross-double chain is worn on sprockets 9, 10 and the chain is set to a certain tension.

If the bend meets the condition a (min) ² = c ² - b ² , then the section of the chain connecting the two sprockets 9 and 10 and being out of contact with the sprockets 9 and 10, tends to stretch in a straight line under the action of tension forces. The support plates 1 located in this section, in this case, tend to occupy a position perpendicular to the direction of movement of the chain.

If the bend meets the condition a (min) ² > c ² - b ² , then the chain segment connecting the two sprockets 9 and 10 and being out of contact with the sprockets 9 and 10, tends to bend into an arc of the maximum possible radius under the action of tension forces. The support plates 1 located in this section tend to lie on the radius of this arc.

In the parts of the chain covering the sprockets 9 and 10, the support plates 1, abutting the edges of their lower part against the troughs between the teeth of the sprockets 9 and 10, due to the tension forces are self-aligning along the radial lines of the sprockets 9 and 10. The support plate running on the sprocket 9 (10) 1, being at the distance of one step (11) of the cross-doubled chain of the point of conjugation (13) with asterisk 9 (10), it begins to oscillate (along trajectory 15), directed from asterisk 9 (10). The oscillation region of the incident link of the cross-double chain and sprocket 9 (10) lie on opposite sides of the tangent 14 drawn to the circle representing the sprocket 9 (10) at the point where the chain and sprocket 9 (10) are conjugated. The maximum (12) oscillations of the support plate 1 passes, being from the entrance to the contact with an asterisk 9 (10) at a distance of half a step of the cross-double chain. Next, the support plate 1 mates with the cavity sprocket 9 (10), at the same time completing the oscillation and starting to move along a circular path.

Thus, the conjugation of a cross-double chain with an asterisk is not shock-like and occurs without friction loss between the mating surfaces. Under the action of tension forces and due to the abutment of the base plate 1 in the cavity between the teeth, the base plates will self-install along the radial lines of the sprocket 9 (10) (the base plates 1 will occupy a position in which the line drawn through the axes of the outer 3 and inner 4 fingers lies on the radial line of the sprocket 9 (1O)).

Having entered into engagement with the drive sprocket, the support plate 1 receives the torque from the side of the sprocket with its lower face and transfers it to the next plate 1 through the external 3 and internal 4 fingers.

The moving chain, mating with the driven sprocket, gives off the power flow through the contact of the support plates 1 with the cavity between the teeth of the sprocket.

This invention is not limited to the structural implementation of the elements described in this application. So, for example, instead of joints based on fingers 3 and 4, any known friction and rolling joints can be used. Bending the chain in one direction can be ensured by the use of supporting 1 and connecting 2 plates of any other shape in it, as well as any other mutual arrangement in the assembly, for example, the shape of the plates can be pear-shaped, ellipsoidal, T-shaped, L-shaped.

In the second embodiment, the cross-double chain, in order to avoid jumping off the cross-double chain from the sprocket, the chain on both sides can be provided with guide plates.

The chain of the claimed design can be used as a variator chain. In this case, the ends of all fingers 3 and 4 should be beveled at an angle equal to half the camber angle of the disks 16 of the conical pulley; fingers 3 of the outer row should be longer than fingers 4 inner row, and they must be fixed in the assembled chain in such a way that, in cross section, the assembled chain forms an isosceles trapezoid, the bases of which are parallel to fingers 3 and 4, while the faces of the beveled ends of fingers 3 and 4 (in cross section) lie on sides of this isosceles trapezoid, the larger base of the isosceles trapezoid lies in the region of the outer 3 fingers, the smaller base of the isosceles trapezoid lies in the region of the inner 4 fingers. The surface of the ends of the fingers 3 and 4 has a concave shape and mates with the surface of the disks 16 of the conical pulley (Fig.6, Fig.9).

In another preferred embodiment of the cross-double chain, each link of the chain must additionally contain cheeks 17, intended, on the one hand, to serve as supporting 1 plates, connecting the external 3 and internal 4 fingers, and on the other hand, they have the function of pairing the chain its outer side surface with disks 16 of the conical pulleys (Fig.7, Fig.8).

The outer side surface of the cheek 17 in a cross section is beveled, so that when assembled, the chain in the cross section forms an isosceles trapezoid (Fig. 8). The outer side surface of the cheeks 17 has a concave shape and mates with the surface of the disks 16 of the conical pulley (Fig. 9, Fig. 10).

In a longitudinally horizontal section, the concavity of the surface of the elements mating with the surface of the disk 16 is a conical section, whose vertex and focus lie on a straight line, which, in turn, also lies in the same plane with the axes of the outer 3 and inner 4 fingers connected by the support 1 plate. The conical section of the disk 16 and the conical section of concavity formed by the same longitudinally horizontal section (Fig. 9, Fig. 10) in the upper position H (max) of the chain, dressed on a conical pulley (Fig. 8, Fig. 11) are equivalent or the conical section of the disk 16 lies in the region of the conical section of concavity, while the vertices of the conical sections of concavity and disk 16 coincide, and the foci lie on one straight line or coincide.

In a preferred embodiment, the conical section of concavity in a longitudinally horizontal section (Fig. 9, Fig. 10) is a hyperbola. In another preferred embodiment, the concavity, being a hyperbola in a longitudinally horizontal section (Fig. 9, Fig. 10), fully corresponds to the curved surface of the disk 16 of the conical pulley at the place of coupling with the chain in the upper position H (max).

Thus, the smallest width of the link of the assembled variator chain in the longitudinal - horizontal section (Fig. 9, Fig. 10) at the level of the concave surface lies on a straight line formed by the intersection of the longitudinal - horizontal section and the plane formed by the axes of the outer 3 and inner 4 fingers connected supporting 1 plate.

The device operates as follows. The cross-double chain is put on the disks 16 of the variator pulleys and set the working tension for it.

If the bend meets the condition a (min) ² = c ² - b ² , then the chain section connecting the disks 16 of the two conical pulleys and being out of contact with them, tends to stretch in a straight line under the action of tension forces. If the bend meets the condition a (min) ² > c ² - b ² , then the section of the chain connecting the disks

16 of two conical pulleys and being out of contact with them, under the action of tensile forces tends to bend into an arc of the maximum possible radius.

Under the action of tension forces and due to concavity on the working surface of the chain elements mating with the disks 16 of the conical pulleys, the support plates 1 will self-align along the radial lines of the pulleys.

Thus, a technical result is achieved, consisting in increasing the area of the contact spot of the chain with the disk 16 of the conical pulley. If a variant of a cross-double chain is used as a variator chain in contact with the disks 16 of the conical pulley with the end beveled concave part of the outer 3 and inner 4 fingers, the total contact area will be increased due to the fact that two fingers 3 and 4 fall on one step of the chain. If the variant of a cross-double chain in contact with the disks 16 of the conical pulley on the side surface of the cheeks 17 is used as the variator chain, the total area contact will be increased many times due to the fact that it will be formed on the disk 16 along the generatrix of the cone, and on the sloping concave surface σ of the cheek 17 along the line lying in the plane σ formed by the axes of the outer 3 and inner 4 fingers connected by the support plate 1. Running onto the pulley of the variator, the support plate 1, being at a distance of one step of the cross-double chain from the point of interfacing with the disks 16 of the conical pulley, starts to oscillate, directed from the pulley. The oscillation region of the incident link of the cross-double chain and the pulley lie on opposite sides of the tangent drawn to the circle representing the disk 16, at the point where the axis of the inner 4 finger and the disk 16 are conjugated. The maximum oscillation of the support plate 1 passes from the entrance to contact with the disk 16 at a distance of half a step of the cross-double chain. Due to the deviation of the support plate 1 from the tangent and, accordingly, from the disks 16 of the pulleys, the wider part of the link passes the wedge-shaped section between the disks 16, which for a given working position of the chain corresponds to the smallest width of the link (in the concavity region). Further, the part of the link represented by the support plate 1, approaching the path with the tangent, comes into contact with the concave surface in the narrowest place in the longitudinal-horizontal section and self-aligns along the radial line of the pulley. The output of the circuit from the interface with the pulley disks 16 occurs in the reverse order.

Thus, the pairing and the pairing out of the cross-twin variator circuit with disks 16 of the taper pulley of the variator does not have a shock character and occurs without friction loss between their surfaces.

The disks 16 of the leading conical pulley, exerting pressure on the end surface of the fingers 3 and 4, transmit their torque to them. The fingers 3 and 4, in turn, through the connecting plates 2 transmit a pulling force to the next chain link. In another preferred embodiment, the disks 16 of the driving cone pulley, exerting pressure on the lateral surface of the cheeks 17 of one link, transmit their torque to them. Cheeks 17, in turn, squeezing fingers 3 and 4, are a conductor of torque discs 16 on the fingers 3 and 4. The fingers 3 and 4, in turn, through the connecting plates 2 transmit the pulling force to the next chain link.

The driven pulley, coming into contact with the chain, takes a pulling force, squeezing the chain elements between the disks 16.

This invention is not limited to the design of the ends of the fingers and side surfaces of the cheeks, painted in this application. Concavity can be formed on the entire lateral surface of the chain element, mating with the disk 16 of the conical pulley or only on part of its surface.

Claims

Claim

1. Cross-double chain containing angled to each other links made of at least one level pairwise connected by two rows of fingers of the support and connecting plates, so that on the lower tier of the link the outer row of fingers connects the upper parts of the support and connecting plates, and the inner row of fingers is the opposite lower parts of the support plates and the lower parts of the right connecting plates on the right, and on the upper tier of the link, the outer row of fingers connects the upper parts of the support and upper parts five adjacent left connecting plates and the inner row of pins - the lower part of the support and connecting plates, wherein in the link tier of support plates located between the tiers of connecting plates, wherein the following condition is satisfied: a (min) ^2> c ² - b ² where a - the distance between the axes of adjacent outer fingers (mm); C is the distance between the axes of the outer and inner fingers connected by a connecting plate (mm); b - the distance between the axes of the outer and inner fingers, United by a support plate (mm).

2. The cross-double chain according to claim 1, in which the connecting plate is made with a bend in the lower part.

3. The cross-double chain according to claim 2, in which the base plate is made with the expansion in the upper part.

4. The cross-double chain according to claim 5, in which the fingers of the outer row are longer than the fingers of the inner row.

5. The cross-double chain according to claim 6, in which the ends of the fingers are beveled and concave.

6. The cross-dual chain according to claim 5 _; in which each link additionally contains cheeks.

7. The cross-double chain according to claim 6, in which the cheeks are beveled and concave on the outer side surfaces.

8. The cross-dual chain according to claim 7, which is a variator.

9. A cross-double chain comprising angled to each other links made of at least one level of support and connecting plates pairwise connected by two rows of fingers, so that on the lower tier of the link an external row of fingers connects the upper parts of the support and connecting plates, and the inner row of fingers is the opposite lower parts of the base plates and the lower parts of the right connecting plates on the right, and on subsequent tiers the outer row of fingers connects the upper parts of the adjacent connector plates, and the inner row of fingers is the lower parts of adjacent connecting plates with an offset of one plate, while the following condition is fulfilled: a (min) ² > c ² - b ² , where a is the distance between the axes of adjacent outer fingers (mm); C is the distance between the axes of the outer and inner fingers connected by a connecting plate (mm); b - the distance between the axes of the outer and inner fingers, United by a support plate (mm).

10. The cross-double chain according to claim 9, in which the connecting plate is made with a bend in the lower part.

11. The cross-double chain of claim 10, in which the support plate is made with the expansion in the upper part.

12. The cross-double chain according to claim P, in which the fingers of the outer row are longer than the fingers of the inner row.

13. The cross-double chain of claim 14, wherein the ends of the fingers are beveled and concave.

14. The cross-double chain of claim 13, wherein each link further comprises cheeks.

15. The cross-double chain of claim 14, wherein the cheeks are beveled and concave on the outer side surfaces.

16. The cross-double chain of 15, which is a variator.