CA2806418A1 - Transmission chain - Google Patents
Transmission chain Download PDFInfo
- Publication number
- CA2806418A1 CA2806418A1 CA2806418A CA2806418A CA2806418A1 CA 2806418 A1 CA2806418 A1 CA 2806418A1 CA 2806418 A CA2806418 A CA 2806418A CA 2806418 A CA2806418 A CA 2806418A CA 2806418 A1 CA2806418 A1 CA 2806418A1
- Authority
- CA
- Canada
- Prior art keywords
- rocker
- pin
- bore
- locking element
- rocker pin
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
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
- F16G—BELTS, CABLES, OR ROPES, PREDOMINANTLY USED FOR DRIVING PURPOSES; CHAINS; FITTINGS PREDOMINANTLY USED THEREFOR
- F16G5/00—V-belts, i.e. belts of tapered cross-section
- F16G5/16—V-belts, i.e. belts of tapered cross-section consisting of several parts
- F16G5/18—V-belts, i.e. belts of tapered cross-section consisting of several parts in the form of links
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transmissions By Endless Flexible Members (AREA)
Abstract
The invention provides a transmission chain with links which are mutually coupled by rocker pin assemblies with each a first and a second elongate rocker pin of which at least one co-operates in a torque transmitting way with pulley sheaves, and in which links and rocker pins are secured against a mutual displacement in that a bore is provided in each of the end areas of the rocker pins which crosses the longitudinal axis of the rocker pin and is directed in the height dimension of the rocker pin, said bore comprising two in-line parts of mutually different cross-section of which the larger one accommodates a pin-shaped part of a locking element which lies outside this bore and co-operates with a side surface of a link.
Description
=
Short title: Transmission Chain The invention relates to a chain with links which are mutually coupled by rocker pin assemblies which each comprise a first and a second elongate rocker pin, of which the opposite longitudinal surfaces roll, during operation, over each other and of which rocker pins at least one is destined to co-operate in a torque transmitting way with the respective end surfaces thereof with the opposite cone-shaped surfaces of a pair of pulley sheaves, in each of the end areas of a rocker pin a bore is formed in which is accommodated a part of a locking element which lies outside this bore and co-operates with a side surface of a link.
Such chains are of a type generally known from EP0741255 and US 5 728 021, both in the name of Applicant.
Securing the rocker pins of such chains with respect to the links by means of locking elements is suggested in EP 1760361 Al, par. 054-055 and EP 1555455, par. 030-032, although no specific structural embodiments of such a locking element is given in these documents.
The locking of the rocker pins with respect to the links in industrial transmissions is very important. During standstill of a transmission there is, of course, no stress in the chain so that as a result of the vibrations which are always present in an industrial environment one or more links can move slowly outwardly, so far that they can drop off the rocker pins. These vibrations can also have as a result that in the straight part of the chain one or more rocker pins move to the outside of the chain. During start-up of the transmission firstly the tension force in the chain comes into play so that the components of the chain are immediately immovable with respect to each other. When then the transmission starts to rotate loose components which are displaced will surely come into contact with the pulley sheaves so that the transmission will suffer severe damage.
In such transmissions it is often very difficult to remove pin-shaped locking elements from the bore in which they are accommodated. However, this removal may be necessary for purposes of periodical inspection and overhaul.
The invention proposes to facilitate the positioning and removal of the locking elements in that the bore ends in both the respective narrow, opposite, side surfaces of the rocker pin and comprises a first part which accommodates a pin-shaped part of a locking element merging into a narrowed second part in the prolongation thereof.
The pin-shaped part of the locking element is accommodated in the first part of the bore while the second, narrower part thereof remains free. During insertion the pin-shaped part cannot go further down than the transition between the first part and the second part so that the position of the locking element is always well-defined while removal is easily effected by inserting an elongated tool into the second part of the bore.
Short title: Transmission Chain The invention relates to a chain with links which are mutually coupled by rocker pin assemblies which each comprise a first and a second elongate rocker pin, of which the opposite longitudinal surfaces roll, during operation, over each other and of which rocker pins at least one is destined to co-operate in a torque transmitting way with the respective end surfaces thereof with the opposite cone-shaped surfaces of a pair of pulley sheaves, in each of the end areas of a rocker pin a bore is formed in which is accommodated a part of a locking element which lies outside this bore and co-operates with a side surface of a link.
Such chains are of a type generally known from EP0741255 and US 5 728 021, both in the name of Applicant.
Securing the rocker pins of such chains with respect to the links by means of locking elements is suggested in EP 1760361 Al, par. 054-055 and EP 1555455, par. 030-032, although no specific structural embodiments of such a locking element is given in these documents.
The locking of the rocker pins with respect to the links in industrial transmissions is very important. During standstill of a transmission there is, of course, no stress in the chain so that as a result of the vibrations which are always present in an industrial environment one or more links can move slowly outwardly, so far that they can drop off the rocker pins. These vibrations can also have as a result that in the straight part of the chain one or more rocker pins move to the outside of the chain. During start-up of the transmission firstly the tension force in the chain comes into play so that the components of the chain are immediately immovable with respect to each other. When then the transmission starts to rotate loose components which are displaced will surely come into contact with the pulley sheaves so that the transmission will suffer severe damage.
In such transmissions it is often very difficult to remove pin-shaped locking elements from the bore in which they are accommodated. However, this removal may be necessary for purposes of periodical inspection and overhaul.
The invention proposes to facilitate the positioning and removal of the locking elements in that the bore ends in both the respective narrow, opposite, side surfaces of the rocker pin and comprises a first part which accommodates a pin-shaped part of a locking element merging into a narrowed second part in the prolongation thereof.
The pin-shaped part of the locking element is accommodated in the first part of the bore while the second, narrower part thereof remains free. During insertion the pin-shaped part cannot go further down than the transition between the first part and the second part so that the position of the locking element is always well-defined while removal is easily effected by inserting an elongated tool into the second part of the bore.
- 2 -Preferably the locking element is a clamping sleeve, such as easily obtainable in many dimensions.
In a preferred embodiment the locking element protrudes from that side part of a rocker pin which lies during operation at the inside of the chain.
The centrifugal forces which act upon the locking element during the operation of the chain will then always press the element securely into the bore.
The invention will be elucidated on the hand of the drawings. In the drawings show:
fig. 1 a perspective end view of a part of a transmission chain in which the invention is implemented;
fig. 2 in cross-section the combination of a first and a second elongate rocker pin, both provided with a locking element which protrudes partly outside this pin;
fig. 3 a schematic view of a known continuously variable transmission with its chain.
Fig. 1 shows a part of a transmission chain which is in its entirety indicated with reference numeral 2 and which is of the kind such as described in the introduction of this Application. This transmission chain comprises, as known in itself, links 4, each provided with two distant openings 6, 8. Each of these openings accommodates, non-rotatably, a pair of two elongate rocker pins 10 and 12 respectively which roll with their side surfaces over each other. Of each pair of rocker pins 10, 12 the first rocker pin 10 is shorter than the second rocker pin 12, and the latter pins 12 are destined to co-operate in a torque transmitting way with their ends with the respective opposite cone-shaped surfaces of a pair of pulley sheaves of a continuously variable transmission in which this transmission chain 2 is used. This is, as already stated, the well-known prior art as documented in the above.
As discussed in the introduction it is necessary to secure the rocker pins 10 and 12 respectively against shifting with respect to the links 4 in which they are accommodated, in another way than the use of the known press fit between the links and the rocker pins.
To this end the invention proposes that in each of the end areas 10a and 12a respectively of the respective rocker pins a bore is provided which accommodates a pin-shaped part of a locking element which lies outside this bore and co-operates with a side surface of the link.
The drawings show how this is implemented in a preferred embodiment of the invention. Fig. 2 shows in cross-section the rocker pin 10 with in its end area 10a a bore 20 which runs in the direction of the height of the rocker pin 12 from the upper end surface 10b of the rocker pin 10 to the lower end surface 10c thereof. This bore consists of two in-line parts, namely a first, lower, part 22a, which debouches into the lower end surface 10c and a second upper part 22b with a diameter which is greater than same of the first part 22a and which debouches in the upper end surface 10b. This second part 22b of the bore accommodates, closely fitting, a pin-shaped locking element 24. Preferably and as shown in the drawing this pin-shaped locking element 24 is a clamping sleeve, such as known in itself
In a preferred embodiment the locking element protrudes from that side part of a rocker pin which lies during operation at the inside of the chain.
The centrifugal forces which act upon the locking element during the operation of the chain will then always press the element securely into the bore.
The invention will be elucidated on the hand of the drawings. In the drawings show:
fig. 1 a perspective end view of a part of a transmission chain in which the invention is implemented;
fig. 2 in cross-section the combination of a first and a second elongate rocker pin, both provided with a locking element which protrudes partly outside this pin;
fig. 3 a schematic view of a known continuously variable transmission with its chain.
Fig. 1 shows a part of a transmission chain which is in its entirety indicated with reference numeral 2 and which is of the kind such as described in the introduction of this Application. This transmission chain comprises, as known in itself, links 4, each provided with two distant openings 6, 8. Each of these openings accommodates, non-rotatably, a pair of two elongate rocker pins 10 and 12 respectively which roll with their side surfaces over each other. Of each pair of rocker pins 10, 12 the first rocker pin 10 is shorter than the second rocker pin 12, and the latter pins 12 are destined to co-operate in a torque transmitting way with their ends with the respective opposite cone-shaped surfaces of a pair of pulley sheaves of a continuously variable transmission in which this transmission chain 2 is used. This is, as already stated, the well-known prior art as documented in the above.
As discussed in the introduction it is necessary to secure the rocker pins 10 and 12 respectively against shifting with respect to the links 4 in which they are accommodated, in another way than the use of the known press fit between the links and the rocker pins.
To this end the invention proposes that in each of the end areas 10a and 12a respectively of the respective rocker pins a bore is provided which accommodates a pin-shaped part of a locking element which lies outside this bore and co-operates with a side surface of the link.
The drawings show how this is implemented in a preferred embodiment of the invention. Fig. 2 shows in cross-section the rocker pin 10 with in its end area 10a a bore 20 which runs in the direction of the height of the rocker pin 12 from the upper end surface 10b of the rocker pin 10 to the lower end surface 10c thereof. This bore consists of two in-line parts, namely a first, lower, part 22a, which debouches into the lower end surface 10c and a second upper part 22b with a diameter which is greater than same of the first part 22a and which debouches in the upper end surface 10b. This second part 22b of the bore accommodates, closely fitting, a pin-shaped locking element 24. Preferably and as shown in the drawing this pin-shaped locking element 24 is a clamping sleeve, such as known in itself
- 3 -=
and available in many different dimensions.
In a similar way a bore 26 is provided in each end area 12a of each second pin-shaped rocker pin 12 which also runs from the upper end edge 12b to the lower end edge 12c. Here, too, the bore 26 is stepped with a first part 28a followed by a second part with somewhat greater diameter 28b. This second part 28b accommodates closely fitting a pin-shaped locking element 30, which is here, too, a clamping sleeve known in itself.
By means of these structural very simple measures it is obtained that the rocker pins 10, 12 are locked very effectively against a displacement thereof in their longitudinal direction with respect to the links 4, while positioning and removal of the locking elements are easily effected.Removal can be done by means of a closely fitting elongate tool inserted into the narrower bore without the need of actually seeing of what one is doing.
Fig. 3 shows schematically the known way in which a transmission chain 2 according to the prior art, thus not provided with the locking elements according to the invention, co-operates with the pulley sheaves 30a, 30b, 32a, 32b of a continuously variable transmission which is not shown in greater detail. Here the problems may occur which are described in the introduction to the specification.
As shown the ends of the rocker pins 12 are clamped between the surfaces of the pulley sheaves. The pulley sheaves 30a, 30b can be, for instance, the driving pulley sheaves so that the chain 12 transmits a torque via the pins 12 and the links 4 to the driven pulley sheaves 32a, 32b. The actual position of the pulley sheave 30b is controlled by a (not shown) actuating device which displaces this sheave in the direction of the arrows 34 while the actual position of the pulley sheave 32b is controlled by a (not shown either) actuating device which displaces the pulley sheave in the direction of the arrows 36. The respective movements are such that, when one pulley sheave moves to the left (in the drawing) the other moves to the right, and opposite.
and available in many different dimensions.
In a similar way a bore 26 is provided in each end area 12a of each second pin-shaped rocker pin 12 which also runs from the upper end edge 12b to the lower end edge 12c. Here, too, the bore 26 is stepped with a first part 28a followed by a second part with somewhat greater diameter 28b. This second part 28b accommodates closely fitting a pin-shaped locking element 30, which is here, too, a clamping sleeve known in itself.
By means of these structural very simple measures it is obtained that the rocker pins 10, 12 are locked very effectively against a displacement thereof in their longitudinal direction with respect to the links 4, while positioning and removal of the locking elements are easily effected.Removal can be done by means of a closely fitting elongate tool inserted into the narrower bore without the need of actually seeing of what one is doing.
Fig. 3 shows schematically the known way in which a transmission chain 2 according to the prior art, thus not provided with the locking elements according to the invention, co-operates with the pulley sheaves 30a, 30b, 32a, 32b of a continuously variable transmission which is not shown in greater detail. Here the problems may occur which are described in the introduction to the specification.
As shown the ends of the rocker pins 12 are clamped between the surfaces of the pulley sheaves. The pulley sheaves 30a, 30b can be, for instance, the driving pulley sheaves so that the chain 12 transmits a torque via the pins 12 and the links 4 to the driven pulley sheaves 32a, 32b. The actual position of the pulley sheave 30b is controlled by a (not shown) actuating device which displaces this sheave in the direction of the arrows 34 while the actual position of the pulley sheave 32b is controlled by a (not shown either) actuating device which displaces the pulley sheave in the direction of the arrows 36. The respective movements are such that, when one pulley sheave moves to the left (in the drawing) the other moves to the right, and opposite.
Claims (3)
1. Transmission chain with links which are mutually coupled by rocker pin assemblies which each comprise a first and a second elongate rocker pin, of which the opposite longitudinal surfaces roll, during operation, over each other and of which rocker pins at least one is destined to co-operate in a torque transmitting way with the respective end surfaces thereof with the opposite cone-shaped surfaces of a pair of pulley sheaves while in each of the end areas of a rocker pin a bore is formed in which is accommodated a part of a locking element which lies outside this bore and co-operates with a side surface of a link, characterised in that the bore ends in both the respective narrow, opposite, side surfaces of the rocker pin and comprises a first part which accommodates a pin-shaped part of the locking element merging into a narrowed second part in the prolongation thereof.
2. Transmission chain according to claim 1, characterised in that the locking element is a clamping sleeve.
3. Transmission chain according to claims 1-2, characterised in that the locking element protrudes from that side part of a rocker pin which lies during operation at the inside of the chain.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL1039424 | 2012-02-29 | ||
| NL1039424A NL1039424C2 (en) | 2012-02-29 | 2012-02-29 | BORGING PENS. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2806418A1 true CA2806418A1 (en) | 2013-08-29 |
Family
ID=49080466
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2806418A Abandoned CA2806418A1 (en) | 2012-02-29 | 2013-02-20 | Transmission chain |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN103291839A (en) |
| CA (1) | CA2806418A1 (en) |
| NL (1) | NL1039424C2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3333451A1 (en) * | 2016-12-07 | 2018-06-13 | Borgwarner Inc. | Chain pin retention method |
| CN110023649A (en) * | 2016-12-01 | 2019-07-16 | C·克洛佩特 | Self-locking locking members for continuously variable transmission systems |
| EP3390861A4 (en) * | 2015-12-18 | 2019-08-14 | BorgWarner Inc. | Chain pin retention |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3059751B1 (en) * | 2016-12-01 | 2019-01-25 | Cyril Clopet | LINK FOR TRANSMISSION MECHANISMS |
| CN113264324B (en) * | 2020-02-17 | 2022-10-11 | 群翊工业股份有限公司 | Substrate conveying equipment |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB349718A (en) * | 1930-04-11 | 1931-06-04 | Renold Hans Ltd | Improvements in or relating to transmission chains |
| US2755677A (en) * | 1952-11-12 | 1956-07-24 | Morse Chain Co | Detachable chain with pintle pin fastening means |
| JPS5753893Y2 (en) * | 1976-11-18 | 1982-11-22 | ||
| JPH0595916A (en) * | 1991-10-04 | 1993-04-20 | Fukuda Denshi Co Ltd | Patient monitor |
| JPH0595916U (en) * | 1992-05-29 | 1993-12-27 | 株式会社椿本チエイン | Ceramic chain pin retaining structure |
| US20050187057A1 (en) * | 2004-01-14 | 2005-08-25 | Koyo Seiko Co., Ltd. | Power transmission chain and power transmission apparatus using same |
| JP2005321066A (en) * | 2004-05-11 | 2005-11-17 | Koyo Seiko Co Ltd | Power transmission chain and power transmission unit using the same |
| JP2007192352A (en) * | 2006-01-20 | 2007-08-02 | Borg Warner Morse Tec Japan Kk | Silent chain |
| CN201065913Y (en) * | 2007-08-07 | 2008-05-28 | 童孝光 | Double pin axle tooth chain |
| CN201666292U (en) * | 2010-03-11 | 2010-12-08 | 姚顺 | Automatic locking round pin |
| CN201823719U (en) * | 2010-09-25 | 2011-05-11 | 张跃文 | Chain plate transmission mechanism for underwater cleaner |
-
2012
- 2012-02-29 NL NL1039424A patent/NL1039424C2/en not_active IP Right Cessation
-
2013
- 2013-02-20 CA CA2806418A patent/CA2806418A1/en not_active Abandoned
- 2013-02-27 CN CN2013100630923A patent/CN103291839A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3390861A4 (en) * | 2015-12-18 | 2019-08-14 | BorgWarner Inc. | Chain pin retention |
| CN110023649A (en) * | 2016-12-01 | 2019-07-16 | C·克洛佩特 | Self-locking locking members for continuously variable transmission systems |
| EP3333451A1 (en) * | 2016-12-07 | 2018-06-13 | Borgwarner Inc. | Chain pin retention method |
Also Published As
| Publication number | Publication date |
|---|---|
| NL1039424C2 (en) | 2013-09-02 |
| CN103291839A (en) | 2013-09-11 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request |
Effective date: 20180220 |
|
| FZDE | Discontinued |
Effective date: 20200831 |