CA2636530C - Method for measuring the slack of chain on a tracked vehicle - Google Patents
Method for measuring the slack of chain on a tracked vehicle Download PDFInfo
- Publication number
- CA2636530C CA2636530C CA2636530A CA2636530A CA2636530C CA 2636530 C CA2636530 C CA 2636530C CA 2636530 A CA2636530 A CA 2636530A CA 2636530 A CA2636530 A CA 2636530A CA 2636530 C CA2636530 C CA 2636530C
- Authority
- CA
- Canada
- Prior art keywords
- chain
- upper strand
- extension
- extension elements
- cord
- 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.)
- Expired - Fee Related
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D55/00—Endless track vehicles
- B62D55/08—Endless track units; Parts thereof
- B62D55/30—Track-tensioning means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D55/00—Endless track vehicles
- B62D55/32—Assembly, disassembly, repair or servicing of endless-track systems
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
- Automobile Manufacture Line, Endless Track Vehicle, Trailer (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
- Machines For Laying And Maintaining Railways (AREA)
- Length Measuring Devices With Unspecified Measuring Means (AREA)
- A Measuring Device Byusing Mechanical Method (AREA)
Abstract
A method for measuring the slack of chain on a tracked vehicle. On the upper strand (2) of the chain, three extension elements (3.1, 3.2, 3.3) of predetermined length are fixed running vertically from the upper strand downwards in such a way that a first and a second extension element (3.1, 3.2) are arranged, one at the starting point and the other at the end point, of a predetermined segment (L) of the upper strand (2), while a third extension element (3.3) is arranged at the middle (M) of the predetermined segment (L). On the first and second extension elements (3.1, 3.2), the ends of a cord (4) are fastened at a predetermined height below the upper strand (2) of the chain in such a way that said cord is stretched horizontally between the first and second extension elements (3.1, 3.2). By means of the third extension element (3.3), which carries a measuring scale (3.32), the vertical distance from the middle of the segment (L) of the upper strand (2) of the chain to the middle of the cord (4) is determined. The extension elements (3.1, 3.2, 3.3) can be shaped like rods which carry on one end thereof a fastening plate (3.11, 3.21, 3.31) formed as a permanent magnet.
Description
Method for Measuring the Slack of Chain on a Tracked Vehicle The invention relates to a method for measuring the slack of chain on a tracked vehicle.
In tracked vehicles, in particular military tracked vehicles, the chain tension is measured via the slack of chain on the upper strand of the chain. It is known that, to accomplish this, a cord is stretched over a predetermined longitudinal segment between two track-supporting rollers of the upper strand of the chain. The cord is placed over the end connectors of the chain, or fastened to them, and weighted, for example, with weights for the stretching, and it generally extends over a predetermined number of end connectors. The slack of the upper strand of the chain on this longitudinal segment is then measured vis-a-vis the cord.
This measuring becomes extremely troublesome and expensive in vehicles in which the upper strand of the chain is not accessible, so that cover plates for the chain, chain aprons or protective elements must first be removed or swung away, so that the measuring cord can be suspended and the slack determined.
The object of some embodiments of the invention is to provide a method for measuring the slack of chain on a tracked vehicle and devices for carrying out this method which make it possible to determine the slack of the chain without first having to remove the protective elements covering the upper strand of the chain.
According to an aspect of the invention, there is provided a method for measuring the slack of chain on a tracked vehicle in which the slack of the chain on a predetermined longitudinal segment of an upper strand of the chain is compared with a run of a flexible comparative element stretched over the same segment and extending in horizontal direction and a vertical distance between the upper strand and the comparative element is measured at a middle of the segment, comprising: a) three extension elements of a predetermined length extending vertically downward from the upper strand are fastened in such a way to the upper strand of the chain that a first and a second extension element are arranged respectively at a starting and end point of the predetermined longitudinal segment of the upper strand, while a third extension element is arranged at the middle of the predetermined segment; b) ends of the flexible comparative element are fastened to the first and second extension elements at a predetermined height below the upper strand of the chain in such a way that it is stretched in horizontal direction between the first and second extension elements;
c) the vertical distance of the middle of the longitudinal segment of the upper strand of the chain from the middle of the comparative element is determined by means of the third extension element which carries a measuring scale.
2a The basic idea of the invention is to place the measuring of the slack of the chain on a plane which is lower vis-a-vis the upper strand of the chain. The comparative element, e.g. the cord, is no longer fastened directly to the end connectors, but extension elements, e.g. in the form of rods, are fastened to the upper strand of the chain in such a way that a first and a second extension element are respectively arranged at the starting point and at the end point of the predetermined longitudinal segment, while a third extension element is arranged exactly in the middle of the longitudinal segment. The comparative element, i.e. for example the cord, is now stretched between the lower ends of the first and second extension element and the slack of the upper strand can now be measured directly with the third extension element which carries a measuring scale at the lower end. As explained in greater detail below with reference to an example of an embodiment, the extension elements can carry on one end thereof a fastening plate formed as a permanent magnet for their fastening to a steel chain- This enables a very quick mounting of the extension elements.
The chain tension can be quickly measured with this method, even with mounted chain cover plates. Thus, no additional lifting device or mass relief by the attendant is necessary, e.g. with heavy protective elements.
An example of an embodiment for the method according to the invention and the devices used therewith shall be described in greater detail in the following with reference to a drawing.
The only figure schematically illustrates a section from the lateral area of e.g. a military tracked vehicle in which the chain cover plates have been removed for showing the method and the devices used. However, it is thereby pointed out that the method may also be carried out with mounted chain cover plates, as shown below.
The tracked vehicle 1 has a chain, a part of the upper strand 2 of which is visible in the figure, which has guides 2.1 and runs over track-supporting rollers 2.2 and 2.3.
The chain tension is to be measured over the longitudinal segment L, the middle of which is designated with M.
Rod-shaped extension elements 3.1, 3.2 and 3.3 are fastened to the upper strand 2 of the chain in vertical direction extending downward. For fastening to the steel chain, the extension elements have fastening plates 3.11, 3.21 and 3.31 formed as permanent magnets on their upper ends in the drawing. The extension elements 3.1 and 3.2 are arranged respectively to the starting point and end point of the predetermined longitudinal segment L. A cord 4 is stretched between their lower ends 3.12 and 3.22 as a comparative element in such a way that it extends in horizontal direction. To this end, the ends 3.12 and 3.22 can, for example, each be provided with an eye through which the cord 4 is drawn, whereby the two free ends can be weighted with weights (not shown) . However, it can also be fastened in another manner. The third extension element 3.3 situated in the middle M is provided with a measuring scale 3.32 in the area of its lower end.
It can be readily seen in the drawing that the slack of the upper strand 2 of the chain on the longitudinal segment L can be measured directly with aid of the extension element 3.3.
The starting point and the end point of the longitudinal segment L, i.e. the measuring section, and the point of the greatest slack at the middle M of this segment, more or less about the length of the rods 3.1, 3.2 and 3.3, are placed downward by the arrangement of the rod-shaped extension elements 3.1, 3.2 and 3.3. In particular with a magnetic fastening, when the chain cover plates are mounted, these extension elements can be inserted and fixed to the upper strand 2 of the chain without great effort, so that the measuring of the slack can be carried out in the lower area which is clearly visible and accessible.
In tracked vehicles, in particular military tracked vehicles, the chain tension is measured via the slack of chain on the upper strand of the chain. It is known that, to accomplish this, a cord is stretched over a predetermined longitudinal segment between two track-supporting rollers of the upper strand of the chain. The cord is placed over the end connectors of the chain, or fastened to them, and weighted, for example, with weights for the stretching, and it generally extends over a predetermined number of end connectors. The slack of the upper strand of the chain on this longitudinal segment is then measured vis-a-vis the cord.
This measuring becomes extremely troublesome and expensive in vehicles in which the upper strand of the chain is not accessible, so that cover plates for the chain, chain aprons or protective elements must first be removed or swung away, so that the measuring cord can be suspended and the slack determined.
The object of some embodiments of the invention is to provide a method for measuring the slack of chain on a tracked vehicle and devices for carrying out this method which make it possible to determine the slack of the chain without first having to remove the protective elements covering the upper strand of the chain.
According to an aspect of the invention, there is provided a method for measuring the slack of chain on a tracked vehicle in which the slack of the chain on a predetermined longitudinal segment of an upper strand of the chain is compared with a run of a flexible comparative element stretched over the same segment and extending in horizontal direction and a vertical distance between the upper strand and the comparative element is measured at a middle of the segment, comprising: a) three extension elements of a predetermined length extending vertically downward from the upper strand are fastened in such a way to the upper strand of the chain that a first and a second extension element are arranged respectively at a starting and end point of the predetermined longitudinal segment of the upper strand, while a third extension element is arranged at the middle of the predetermined segment; b) ends of the flexible comparative element are fastened to the first and second extension elements at a predetermined height below the upper strand of the chain in such a way that it is stretched in horizontal direction between the first and second extension elements;
c) the vertical distance of the middle of the longitudinal segment of the upper strand of the chain from the middle of the comparative element is determined by means of the third extension element which carries a measuring scale.
2a The basic idea of the invention is to place the measuring of the slack of the chain on a plane which is lower vis-a-vis the upper strand of the chain. The comparative element, e.g. the cord, is no longer fastened directly to the end connectors, but extension elements, e.g. in the form of rods, are fastened to the upper strand of the chain in such a way that a first and a second extension element are respectively arranged at the starting point and at the end point of the predetermined longitudinal segment, while a third extension element is arranged exactly in the middle of the longitudinal segment. The comparative element, i.e. for example the cord, is now stretched between the lower ends of the first and second extension element and the slack of the upper strand can now be measured directly with the third extension element which carries a measuring scale at the lower end. As explained in greater detail below with reference to an example of an embodiment, the extension elements can carry on one end thereof a fastening plate formed as a permanent magnet for their fastening to a steel chain- This enables a very quick mounting of the extension elements.
The chain tension can be quickly measured with this method, even with mounted chain cover plates. Thus, no additional lifting device or mass relief by the attendant is necessary, e.g. with heavy protective elements.
An example of an embodiment for the method according to the invention and the devices used therewith shall be described in greater detail in the following with reference to a drawing.
The only figure schematically illustrates a section from the lateral area of e.g. a military tracked vehicle in which the chain cover plates have been removed for showing the method and the devices used. However, it is thereby pointed out that the method may also be carried out with mounted chain cover plates, as shown below.
The tracked vehicle 1 has a chain, a part of the upper strand 2 of which is visible in the figure, which has guides 2.1 and runs over track-supporting rollers 2.2 and 2.3.
The chain tension is to be measured over the longitudinal segment L, the middle of which is designated with M.
Rod-shaped extension elements 3.1, 3.2 and 3.3 are fastened to the upper strand 2 of the chain in vertical direction extending downward. For fastening to the steel chain, the extension elements have fastening plates 3.11, 3.21 and 3.31 formed as permanent magnets on their upper ends in the drawing. The extension elements 3.1 and 3.2 are arranged respectively to the starting point and end point of the predetermined longitudinal segment L. A cord 4 is stretched between their lower ends 3.12 and 3.22 as a comparative element in such a way that it extends in horizontal direction. To this end, the ends 3.12 and 3.22 can, for example, each be provided with an eye through which the cord 4 is drawn, whereby the two free ends can be weighted with weights (not shown) . However, it can also be fastened in another manner. The third extension element 3.3 situated in the middle M is provided with a measuring scale 3.32 in the area of its lower end.
It can be readily seen in the drawing that the slack of the upper strand 2 of the chain on the longitudinal segment L can be measured directly with aid of the extension element 3.3.
The starting point and the end point of the longitudinal segment L, i.e. the measuring section, and the point of the greatest slack at the middle M of this segment, more or less about the length of the rods 3.1, 3.2 and 3.3, are placed downward by the arrangement of the rod-shaped extension elements 3.1, 3.2 and 3.3. In particular with a magnetic fastening, when the chain cover plates are mounted, these extension elements can be inserted and fixed to the upper strand 2 of the chain without great effort, so that the measuring of the slack can be carried out in the lower area which is clearly visible and accessible.
Claims (11)
1. A method for measuring the slack of chain on a tracked vehicle in which the slack of the chain on a predetermined longitudinal segment of an upper strand of the chain is compared with a run of a flexible comparative element stretched over the same segment and extending in horizontal direction and a vertical distance between the upper strand and the comparative element is measured at a middle of the segment, comprising:
a) three extension elements of a predetermined length extending vertically downward from the upper strand are fastened in such a way to the upper strand of the chain that a first and a second extension element are arranged respectively at a starting and end point of the predetermined longitudinal segment of the upper strand, while a third extension element is arranged at the middle of the predetermined segment;
b) ends of the flexible comparative element are fastened to the first and second extension elements at a predetermined height below the upper strand of the chain in such a way that it is stretched in horizontal direction between the first and second extension elements;
c) the vertical distance of the middle of the longitudinal segment of the upper strand of the chain from the middle of the comparative element is determined by means of the third extension element which carries a measuring scale.
a) three extension elements of a predetermined length extending vertically downward from the upper strand are fastened in such a way to the upper strand of the chain that a first and a second extension element are arranged respectively at a starting and end point of the predetermined longitudinal segment of the upper strand, while a third extension element is arranged at the middle of the predetermined segment;
b) ends of the flexible comparative element are fastened to the first and second extension elements at a predetermined height below the upper strand of the chain in such a way that it is stretched in horizontal direction between the first and second extension elements;
c) the vertical distance of the middle of the longitudinal segment of the upper strand of the chain from the middle of the comparative element is determined by means of the third extension element which carries a measuring scale.
2. The method according to claim 1, wherein a cord is used as the flexible comparative element.
3. The method according to claim 1, wherein rods are used as extension elements which are fastened with one end to the upper strand of the chain.
4. The method according to claim 3, wherein to fasten the extension elements to a steel chain, the extension elements used carry on the one end a fastening plate formed as a permanent magnet.
5. The method according to claim 2, wherein rods are used as extension elements which are fastened with one end to the upper strand of the chain.
6. The method according to claim 5, wherein to fasten the extension elements to a steel chain, the extension elements used carry on the one end a fastening plate formed as a permanent magnet.
7. The method according to claim 2, wherein the first and second extension elements carry an eye for fastening or drawing the cord through on an end facing away from the upper strand of the chain in use.
8. The method according to claim 5 or 6, wherein the first and second extension elements carry an eye for fastening or drawing the cord through on an end facing away from the upper strand of the chain in use.
9. The method according to claim 7, wherein to stretch the cord, it is pulled through the eyes of the first and second extension elements and ends of the cord pulled through are each weighted with weights.
10. An extension element for carrying out the method according to claim 1, wherein the extension element is in the form of a metal rod which has a fastening plate formed as a permanent magnet on one end and, on the other end, an eye for drawing a cord through.
11. An extension element for carrying out the method according to claim 1, wherein the extension element is in the form of a metal rod which has a fastening plate formed as a permanent magnet on one end and, on the other end, the measuring scale.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102006050129A DE102006050129B3 (en) | 2006-10-25 | 2006-10-25 | Chain slack measuring method for use in tracked vehicle, involves fixing three extension elements at upper trough of chain such that two extension elements are arranged at length section, and third extension element is arranged on center |
| DE102006050129.2 | 2006-10-25 | ||
| PCT/DE2007/001874 WO2008049396A1 (en) | 2006-10-25 | 2007-10-20 | Method for measuring the slack of chain on a tracked vehicle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2636530A1 CA2636530A1 (en) | 2008-05-02 |
| CA2636530C true CA2636530C (en) | 2011-09-20 |
Family
ID=38859693
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2636530A Expired - Fee Related CA2636530C (en) | 2006-10-25 | 2007-10-20 | Method for measuring the slack of chain on a tracked vehicle |
Country Status (7)
| Country | Link |
|---|---|
| EP (1) | EP1940674B1 (en) |
| AT (1) | ATE444890T1 (en) |
| CA (1) | CA2636530C (en) |
| DE (2) | DE102006050129B3 (en) |
| DK (1) | DK1940674T3 (en) |
| ES (1) | ES2332747T3 (en) |
| WO (1) | WO2008049396A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102012008656A1 (en) | 2011-12-29 | 2013-07-04 | Nonwotecc Medical Gmbh | Structure with fibers glued together in places |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE444442C (en) * | 1925-02-15 | 1927-05-20 | Gustav Richard Fickert | Device for measuring the belt spacing on belt drives |
| DE929510C (en) * | 1953-07-16 | 1955-06-27 | Heyligenstaedt & Co | Stand to accommodate devices that are moved parallel to the surface of the stand while they are in use |
| AT213996B (en) * | 1959-10-22 | 1961-03-10 | Siemens Schuckertwerke Gmbh | Device for determining and / or adjusting the sag of overhead lines |
| US3186099A (en) * | 1961-07-24 | 1965-06-01 | Jr Nicholas Florko | Level with magnetic holding means |
| DD143012A3 (en) * | 1976-09-14 | 1980-07-30 | Probst Hans Joachim | MEASURING DEVICE FOR DETERMINING THE PASSOVER OF PARDUNES |
| JPS5667702A (en) * | 1979-11-06 | 1981-06-08 | Yamaha Motor Co Ltd | Slack sensor for driving chain of vehicle |
| DE3406519A1 (en) * | 1984-02-23 | 1985-08-29 | Bergwerksverband Gmbh, 4300 Essen | TENSIONING DEVICE FOR CHAIN DRIVED AGENTS |
| DD245019A1 (en) * | 1985-12-23 | 1987-04-22 | Fortschritt Veb K | DEVICE FOR CHECKING THE CHAIN HOIST FOR CHAIN GEAR |
| JPS62200066A (en) * | 1986-02-26 | 1987-09-03 | Fuji Heavy Ind Ltd | Automatic adjusting device for timing belt |
| JPH08327477A (en) * | 1995-06-05 | 1996-12-13 | Mitsubishi Electric Corp | Instrument for measuring tension of belt |
| DE19646681C2 (en) * | 1996-11-12 | 1998-07-02 | Andreas Appel | Tool for determining the chain sag in millimeters for motorized two-wheelers |
| NL1011625C2 (en) * | 1999-03-22 | 2000-09-27 | Skf Engineering & Res Services | A method of controlling a belt pulley drive system, as well as a belt pulley drive system. |
| DE10044318B4 (en) * | 2000-09-07 | 2004-02-12 | Andreas Appel | Device for determining the chain sag in motorized two-wheelers |
| JP4713074B2 (en) * | 2003-11-04 | 2011-06-29 | 大機工業株式会社 | Measuring method of transmission chain slack |
-
2006
- 2006-10-25 DE DE102006050129A patent/DE102006050129B3/en not_active Expired - Fee Related
-
2007
- 2007-10-20 AT AT07817708T patent/ATE444890T1/en not_active IP Right Cessation
- 2007-10-20 CA CA2636530A patent/CA2636530C/en not_active Expired - Fee Related
- 2007-10-20 WO PCT/DE2007/001874 patent/WO2008049396A1/en active Application Filing
- 2007-10-20 DK DK07817708.6T patent/DK1940674T3/en active
- 2007-10-20 ES ES07817708T patent/ES2332747T3/en active Active
- 2007-10-20 EP EP07817708A patent/EP1940674B1/en active Active
- 2007-10-20 DE DE502007001675T patent/DE502007001675D1/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CA2636530A1 (en) | 2008-05-02 |
| DE102006050129B3 (en) | 2008-01-31 |
| ES2332747T3 (en) | 2010-02-11 |
| WO2008049396A1 (en) | 2008-05-02 |
| EP1940674B1 (en) | 2009-10-07 |
| DK1940674T3 (en) | 2010-01-18 |
| DE502007001675D1 (en) | 2009-11-19 |
| EP1940674A1 (en) | 2008-07-09 |
| ATE444890T1 (en) | 2009-10-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |
Effective date: 20201020 |