KR20080077351A - Inverted tooth chain - Google Patents

Abstract

The invention relates to an inverted tooth chain (11) which comprises stacks of tooth-shaped link plates (2) and at least one guide plate (10), arranged in the stack of link plates (8, 8') or as a lateral end link plate on two link pins (4, 5, 6). The guide plate (10) has a wing (13) which projects over the tooth-shaped part (9) of a tooth-shaped link plate (2) in the same stack of link plates in the direction of travel (L) or opposite to the direction of travel of the inverted tooth chain.

Description

Inverted Tooth Chain {INVERTED TOOTH CHAIN}

The present invention relates to an inverted tooth chain comprising a link plate stack consisting of a toothed link plate and a guide link plate disposed in the link plate stack or on two link pins as a side end link plate.

A guide link plate is required to be able to accurately position one inverted tooth chain on one tooth wheel. The guide link plate may be formed as an inner (single) guide member or an outer (double) guide member. Most of the time, external guide link plates are used because of the use of the external guide link plates to provide further processing of the teeth, i.e. to provide a snap ring groove where the guide link plates engage in the tooth wheel. This is because the work is omitted. The link guide member of the outer guide member is achieved by the superposition of the link wheel front (wheel tooth) and the guide link plate. The guide link plate is an additional link plate in an existing serrated link plate stack.

In the case of the guide link plate according to the prior art, the teeth in front of the guide link plate in front of the guide link plate in the link travel direction means that there is no leading guide member.

An object of the present invention is to provide an inverted tooth chain in which the toothed link plate is guided ahead.

The problem is solved by an inverted tooth chain with guide link plates according to the dependent claims. The problem is solved in particular by an inverted tooth chain comprising a link plate stack consisting of a serrated link plate and a guide link plate disposed in the link plate stack or on two link pins as side link links, in this case The guide link plate has one wing, which wing above one link plate tooth of one toothed link plate in the same link plate stack, in the direction of travel of the inverted tooth chain or opposite to the direction of travel of the inverted tooth chain. Extrude In this type of serrated link plate, the wing of the guide link plate of one tooth wheel reaches in front of the front tooth of the serrated link plate in the direction of link travel. In other words, each individual tooth is guided ahead.

In one refinement of the invention, the guide link plate has two wings, each of which has the same link plate stack, in the direction of travel of the inverted tooth chain and / or as opposed to the direction of travel of the inverted tooth chain, respectively. It protrudes over one link plate tooth in one serrated link plate. In inverted tooth chains, in particular actuated by alternating travel directions, the advantages can be used that the wing according to the invention guides ahead in both travel directions. The constriction in the form of a material-free space remains between the wings, resulting in the advantage of saving material compared to successive wings.

In one refinement of the invention, the wing has a slope on its side facing one wing side of the neighboring guide link plate, the slope corresponding to the neighboring guide link plate when the neighboring guide link plate is bent inward. Allow clearance for the incline. With this type of shape, the wings of neighboring guide link plates do not come into contact with each other when the link is bent inward. When the wings contact each other, that is, when the gap between the two wings completely disappears, the deflection of the toothed link plate reaches the minimum possible diameter.

Preferably, the wing has a slope on its side facing one wing side of the neighboring guide link plate, the slope having a gap with respect to the corresponding slope of the neighboring guide link plate when the neighboring guide link plate is bent inward. Close at least partially. When the gap is almost completely closed, the best leading guide is achieved because the overlap of the teeth and the corresponding teeth of the cog wheels is allowed to the maximum without the two wings of two neighboring guide link plates contacting each other. Because it becomes.

In one refinement of the invention, the wing has a rounding on its side facing one wing side of the neighboring guide link plate, the rounding corresponding to the neighboring guide link plate when the neighboring guide link plate is bent inward. Allow a gap for rounding. With this type of shape, which provides straight rounding instead of inclination, the rounding can be positioned at an optimum position with respect to the overlap of the teeth of one cog wheel when the link is bent inward.

In one preferred embodiment of the inverted tooth chain according to the invention, the guide link plate has a concave portion between the fixing parts formed in the link pin. By this constriction, when the guide link plate is elongated, the spring strength is reduced in comparison with the guide link plate without the constriction. This also reduces the surface compression applied to the securing pins integrated in the link stack with the guide link plates. As a result, when the inverted tooth chain is elongated, the stretching power applied to the guide link plate is reduced.

Preferably, the concave portion has a height lower than the height of the sawtooth link plate. In such a case, the shape of the concave portion may be particularly prominent.

Similarly in the serrated link plate, the serrated link plate comprises a link plate stack consisting of corresponding link plates without teeth, in which case the link plate stack consisting of the serrated link plate and the link plate stack consisting of the corresponding link plate are linked It is alternately arranged in the advancing direction. This arrangement is an alternative shape of the inverted tooth chain in which the teeth consisting of the preceding link plate stack and the subsequent link plate stack no longer overlap.

The problem mentioned in the introduction is also solved by a vehicle, in particular a motor vehicle, with a guide link plate and gear arrangement for the inverted tooth chain according to the invention having the characteristics associated with the guide link plate and the inverted tooth chain according to the invention. do.

Embodiments of the present invention are described in detail below with reference to the accompanying drawings.

1 is a side view of one link plate chain.

2 is a plan view of one link plate chain.

3 is a first embodiment of a guide link plate according to the invention.

4 is a schematic diagram showing the distribution of guide link plates distributed as perforations on the perforated sheet.

5 is a partially enlarged cross-sectional view of an elongated link plate chain with a guide link plate according to FIG. 4.

6 is a partially enlarged cross-sectional view of the bent link plate chain with guide link plates according to FIG. 4.

7 is a second embodiment of a guide link plate according to the invention.

8 is a partially enlarged cross-sectional view of an elongated link plate chain with a contact link plate according to FIG. 7.

9 is a partially enlarged cross-sectional view of the bent link plate chain with the guide link plate according to FIG. 7.

10 is a third embodiment of a guide link plate according to the invention.

FIG. 11 is a partially enlarged cross-sectional view of an elongated link plate chain with a guide link plate according to FIG. 10.

12 is a partially enlarged cross-sectional view of the bent link plate chain with the guide link plate according to FIG. 10.

1 shows a side view of one link plate according to the prior art with two link plate assemblies and FIG. 2 shows a plan view of the link plate. 1 and 2, the basic configuration of the link plate chain and the terms used in the embodiment according to the present invention are described. The embodiments are described by way of example of one link plate chain having two link plate assemblies, but can also be applied to a link plate chain having three link plate assemblies. The link plate chain 1 comprises a plurality of link plates 2 and corresponding link plates 3. The link plates 2 and the corresponding link plates 3 are alternately arranged and connected to corresponding pins 4 functioning as joints. Thus, both ends of one link plate are connected to one or two corresponding link plates by one joint, and correspondingly both ends of one corresponding link plate are one or two link plates by one joint. Is connected to. The joint pin 4 may be integrally formed, but preferably two parts, in which case one rolling member 5 is assigned to each link plate, and the corresponding link plate ( It rolls on the rolling member 6 assigned to 2). The rolling members 5, 6 each have one rolling profile 7 or 7 ′, by which the rolling members can roll or slide with each other. The rolling profiles 7, 7 ′ may be the same or different. The link plate 2 and the corresponding link plate 3 are stacked horizontally with respect to the traveling direction L indicated by an arrow with the reference L, thereby providing two horizontally parallel to the traveling direction L. Corresponding link plates overlappingly arranged are arranged between the corresponding pins 4, and on the contrary, one link plate overlaps each other between two corresponding link plates arranged laterally in parallel with respect to the advancing direction. This does not, of course, apply to the neighboring link plate 2 or the corresponding link plate 3 on only one side, which are each arranged horizontally outward with respect to the direction of travel L. The link plate stacks of the link plates 2 thus formed each form a chain member 8 in a stacking manner, and correspondingly the (corresponding-) link plate stacks of the corresponding link plate 3 in a stacking manner. Chain member 8 'is formed. The link plate 2 and the corresponding link plate 3 may be identical parts in this embodiment, and only in the arrangement state the link plate 2 and the corresponding link plate are different from each other. Therefore, hereinafter, only the link plate 2 will be described, because the corresponding link plates are the same up to the stack arrangement. 2 shows a stack consisting of three link plates 2 and two corresponding link plates 3, respectively, in this case consisting of any other number of link plates 2 and corresponding link plates 3. Stacks may also be provided.

The link plates 2 are each provided with link plate teeth 9-as can be seen in FIG. By means of the link plate teeth 9, the link plate chain can for example be engaged with the engaging portion of one tooth wheel. The pitch between the link plate 2 and the corresponding link plate 3 is designed such that a uniform pitch appears between the link plate teeth 9 in a state where the chain is elongated as a whole. Alternatively, the link plate teeth 9 are further provided in the corresponding link plate 3, as a result of which the link plate teeth 9 are respectively provided in the entire link plate and the corresponding link plate. Likewise, however, it is also possible if only one link plate tooth 9 is provided for each link plate and the corresponding link plate.

3 shows a first embodiment of a guide link plate 10 according to the invention. The guide link plate 10 has two bores 11 and 12, by which the guide link plate can be fixed to the link pin 4. In the embodiment of FIG. 3, the bores 11 and 12 correspond to the rolling members 5, 6, respectively, in which the link plate stacks belonging to the individual chain members 8, 8 ′ are fixed. Formed. The guide link plate 10 comprises a wing 13. The wing 13 is arranged such that the wing lies on the side of the link plate chain 1 that is identical to the link plate chain 9 with the guide link plate 10 mounted in the link plate chain 1. . The wing 13 projects above the base 14 which is arranged substantially symmetrically about the axis of symmetry 15. The guide link plate 10 has a thickness e in the region of the bore 11. The guide link plate 10 has a thickness d between two bores 11, 12, in which case the thickness d is smaller than the thickness e. In other words, the guide link plate 10 is formed in a narrow shape between the bores 11 and 12 and has a narrowed portion 17 there. In the region of the bores 11, 12, a limit straight line 16 lies on the upper surface of the guide link plate 10, ie on the side facing away from the wing 13, and on a lower surface parallel to the limit straight line. In other words, when a straight line 16a in contact with the guide link plate is placed in an area having a thickness e on the side where the wing 13 is disposed, the wing 13 is the pair of straight lines surrounding the base 14. Will protrude above (16, 16a). The base 14 has a circular outer contour with a radius R1 not only in the region of the concave portion 17 but also in the two bores 11 and 12, in which case the radiuses R1 are the same. By such a shape, the guide link plate can be optimally distributed as a perforation on the perforated sheet as shown in FIG. 5 shows a partially enlarged cross-sectional view of a link plate chain 1 with a guide link plate 10 according to the invention. The toothed link plate 2 has a minimum thickness D in the region between the link plate teeth 9 or in the region between the pins 4. The minimum thickness d of the guide link plate 10 in this area is smaller than the minimum thickness D of the tooth link plate 2. When a tensile force F is applied to the link plate chain 1 as a load, the surface compression of the bores 11 and 12 applied to the pin or rolling member appears small, because the cross section of the concave portion 17 This is because the rigidity of the guide link plate 10 itself is low by being relatively small compared with the cross section of the tooth link plate. As can be seen further in FIG. 5, the wing 13 protrudes in the direction of travel L of the inverted tooth chain 1 indicated by the arrow indicated by the reference L in FIG. 5. In other words, the profile of the wing 13 projects above the profile of the link plate teeth 9. Thus, the wing 13 precedes the link plate teeth 9 in the chain travel direction L. Before the link plate teeth 9 are engaged with the tooth wheel 18 shown in FIG. 6, the wings 13 belonging to the guide link plates of the individual link plate stacks have arrived. This process is illustrated in FIG. As can be seen in the figure, the wings 13 precede the link plate teeth 9 and laterally overlap the teeth 22 of the tooth wheel 18.

7-9 show alternative embodiments of the guide link plate 10. The difference from the embodiment of FIGS. 3 to 6 is that in this embodiment, there is a front wing 13a and a rear wing 13b instead of the wing 13. In addition, the embodiment of FIG. 7 substantially coincides with the embodiment of FIG. 3. However, unlike the embodiment according to FIG. 3, the wings 13a and 13b have inclined portions 19a and 19b on the outer surface of the wing, respectively. The inclined portions were formed as straight members. The function of the inclined portions 19a and 19b is shown in the example shown in FIGS. 8 and 9. An elongated chain 1 is shown in FIG. 8 and in FIG. 9 a chain 1 bent or arched at right angles is shown wrapped around the tooth wheel 18. As the elongated chain according to FIG. 8, the teeth 13a, 13b of two consecutive guide link plates 10 have a minimum distance L, resulting in a gap 21 (triangular, enlarged inwardly). Appears. In the link plate chain 1 bent at right angles according to FIG. 9, the inclined portions 19a and 19b of the two consecutive guide link plates 10 are in contact with each other, so that the gap 20 between the two inclined portions eventually becomes Almost or completely gone.

10-12 show a further embodiment of the guide link plate according to the invention. The above embodiment is substantially the same as the embodiment of Figs. 7 to 9, but differs in that the inclined portions 19a and 19b are formed as roundings 20a and 20b in this embodiment. In this embodiment also the wings 13 and in particular the roundings 20a and 20b-as can be seen in FIG. 12-are formed such that neighboring wings of neighboring guide link plates do not contact each other. 10 to 12 are shown without the concave portion 17, the concave portion may also be present in this embodiment.

Explanation of symbols on the main parts of the drawings

One; Link plate chain 2: link plate

3: corresponding link plate 4: corresponding pin

5: rolling member assigned to link plate

6: rolling member assigned to the corresponding link plate

7, 7 ': rolling profile

8, 8 ': link plate stack (chain member)

9: tooth 10: guide link plate

11, 12: Bore 13: Wings

13a: front wing 13b: rear wing

14: base 15: axis of symmetry

16, 16a: limit line 17: narrowed portion

18: minimum spacing 19a, 19b: inclined portion

20a, 20b: rounding 21: gap

22: tooth of cog wheel

e: thickness of the guide link plate in the bore (11, 12) region

L: clearance R1: radius

D: thickness of toothed link plate between pins

F: tensile force

d: of the guide link plate at the narrowest part of the concave part 17

thickness

Claims (11)

A link plate stack consisting of a serrated link plate 2 and a guide link plate 10 arranged in the link plate stack 8, 8 ′ or on two link pins 4, 5, 6 as side link links. Inverted tooth chains comprising The guide link plate 10 comprises a wing 13, which wing is the same link plate in the direction of travel L of the inverted tooth chain 1 or as opposed to the direction of travel L of the inverted tooth chain 1. Inverted tooth chain, characterized by protruding above one link plate tooth (9) of one toothed link plate (2) in the stack (8, 8 '). The method of claim 1, The guide link plate 10 has two wings 13a and 13b, each of which has a direction of travel L of the inverted tooth chain 1 and / or a direction of travel of the inverted tooth chain 1. Inverted tooth chain, as opposed to (L), protrudes over one link plate tooth (9) of one serrated link plate (2) in the same link plate stack (8, 8 '). The method of claim 2, The wings 13a and 13b have inclined portions 19 and 19a on their side facing one wing 13a and 13b of the neighboring guide link plate 10, the inclined portions having neighboring guide link plates. Inverted tooth chain, characterized in that the gap (21) allows for a corresponding inclined portion (19, 19a) of the neighboring guide link plate (10) when the (10) is bent inward. The method of claim 3, wherein The wings 13a, 13b have inclined portions 19a, 19b on their side facing one wing 13a, 13b of the neighboring guide link plate 10, the inclined portions having neighboring guide link plates. Inverted tooth chain, characterized in that at least partly closes the gap (21) for the corresponding inclined portion (19, 19a) of the neighboring guide link plate (10) when is bent inward. The method according to any one of claims 1 to 4, The wing has rounds 20a and 20b on its side facing one wing side of the neighboring guide link plate, the rounding of the neighboring guide link plate 10 when the neighboring guide link plate is bent inward. Inverted tooth chain, characterized in that a gap is allowed for the corresponding roundings (20a, 20b). The method according to any one of claims 1 to 4, Inverted tooth chain, characterized in that the guide link plate (10) has a concave portion (17) between the fixing parts formed in the link pin (4, 5, 6). The method of claim 5, wherein Inverted tooth chain, characterized in that the narrowed portion (17) has a height (d) less than the height (D) of the toothed link plate. The method according to any one of claims 1 to 7, The serrated link plate comprises a link plate stack made of toothless link plates 3, the link plate stack made of serrated link plates 2 and the link plate stack made of corresponding link plates 3 are linked An inverted tooth chain, arranged alternately in a traveling direction (L). Guide link plate (10) for an inverted tooth chain (1) according to any of the preceding claims. Gear device with an inverted tooth chain (1) according to any one of the preceding claims. Vehicle, in particular motor vehicle, with an inverted tooth chain (1) according to any of the preceding claims.

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