CA1128587A - Track-link connector for tracked vehicles - Google Patents
Track-link connector for tracked vehiclesInfo
- Publication number
- CA1128587A CA1128587A CA351,965A CA351965A CA1128587A CA 1128587 A CA1128587 A CA 1128587A CA 351965 A CA351965 A CA 351965A CA 1128587 A CA1128587 A CA 1128587A
- Authority
- CA
- Canada
- Prior art keywords
- cross
- section
- pin
- pins
- track
- 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
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
- B62D55/18—Tracks
- B62D55/20—Tracks of articulated type, e.g. chains
- B62D55/205—Connections between track links
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Insertion Pins And Rivets (AREA)
- Clamps And Clips (AREA)
- Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
- Automobile Manufacture Line, Endless Track Vehicle, Trailer (AREA)
- Pivots And Pivotal Connections (AREA)
- Gears, Cams (AREA)
Abstract
ABSTRACT
In track connector links for crawler vehicles, the pins in consec-utive track-links are connected together positively and frictionally by means of clamping connectors. To this end, known clamping connector comprises two circular bearing-eyes and a flat stop-face located in the clamping area of the connector, which interrupts the circular shape. The corresponding stop-face on the pin extends axially approximately across the width of the clamp and merges, through a transition radius into the circular cross-sectional profile of the pin. As a result of the reduction in cross-section, produced by the stop-race on the pin, and the notch-effect in the vicinity of the transition radius, stresses may arise in service, in the above-mentioned area, which may in time lead to fracture of the pins. This danger of cracks occurring in the pins is eliminated by a pin and connector cross-section which is non-circular and is stepless in the axial direction.
In track connector links for crawler vehicles, the pins in consec-utive track-links are connected together positively and frictionally by means of clamping connectors. To this end, known clamping connector comprises two circular bearing-eyes and a flat stop-face located in the clamping area of the connector, which interrupts the circular shape. The corresponding stop-face on the pin extends axially approximately across the width of the clamp and merges, through a transition radius into the circular cross-sectional profile of the pin. As a result of the reduction in cross-section, produced by the stop-race on the pin, and the notch-effect in the vicinity of the transition radius, stresses may arise in service, in the above-mentioned area, which may in time lead to fracture of the pins. This danger of cracks occurring in the pins is eliminated by a pin and connector cross-section which is non-circular and is stepless in the axial direction.
Description
2~5~7 ~;
: '`
The invention relates to a device for connecting the track links on crawler-track vehicles.
It is known from German Patent 11 14 401 to provide a clamping connector with octahedral recesses for receiving connect-ing pins in a crawler track. ;
It is also known from German Patent 16 80 835 to providea clamping connector with circular bearing eyes, the circular shape changing into a stop-face in the clamping area of the con-nector. By means of this stop-face, the pins in the track are positively and frictionally connected. The stop-face on the pin extends axially, through a transition radius, to the circular cross-sectional profile of the pin. Because of the reduction in cross-section produced by the stop-surface on the pin, and the notch-effect in the vicinity of the transition-radius, stress cracks may occur in this area during operation, eventually causing the pin to fracture.
It is the purpose of the invention to reduce the tendency of such pins to crack, The present invention provides a device for connecting the track-links of a crawler-track vehicle having pins mounted in rubber in eyes in said track-links, connected positively and frictionally, wherein said pins, and said eyes have peripherally stepless cross-sections of non-circular form, the cross-section of said pins being constant throughout the entire length thereof.
As compared with ]snown tracks, the favourable bearing profile, and elimination of the notch-effect, make it possible to use pins substantially smaller in cross-section, which results in correspondingly lighter tracks of ~3~.2~35~
lesser structural height. In addition to the advantages of cost and weight saving, tracks of this kind also have a favourable effect upon the aesign of all of the driving, steering and braking elements of a vehicle.
By selecting a cross~section formed by six arcuate sections which ;~
are alternately Or two differe~t radii, a bearing ratio close to the optimum and a minimal risk of the pins fracturing as a result of notch-effect.
Embodimentsof the invention are illustrated, by way of example only and in the drawing attached hereto, wherein:
Figures 1, la and lb show respectively a side elevation, an end-elevation and a cross-section of a pin;
Figures 2 and 3 show a plan view in part-section and a side eleva-tion o* a connector link for a two-hinge-pin track;
Figures 4 and 4a are two vlews in part section of a one-hinge-pin track;
Figures 5-7 show different pin cross-sections.
The pin according to Figures 1, la, lb has a non-circular cross-section 2, consisting of six sections of arcs with two different radii 3,~, on centres displaced at an angle 5 = 120 in relation to each other and being eymmetrical with respect to the geometric centre of area A of the cross sec-tion 2.
According to Figure 1, the cross section 2 extends over the entire length Or the pin 1. However, the cross-section 2 may also be provided only at the connecting locations 7,8 of the connectors 9,~O shown in Figures 2,
: '`
The invention relates to a device for connecting the track links on crawler-track vehicles.
It is known from German Patent 11 14 401 to provide a clamping connector with octahedral recesses for receiving connect-ing pins in a crawler track. ;
It is also known from German Patent 16 80 835 to providea clamping connector with circular bearing eyes, the circular shape changing into a stop-face in the clamping area of the con-nector. By means of this stop-face, the pins in the track are positively and frictionally connected. The stop-face on the pin extends axially, through a transition radius, to the circular cross-sectional profile of the pin. Because of the reduction in cross-section produced by the stop-surface on the pin, and the notch-effect in the vicinity of the transition-radius, stress cracks may occur in this area during operation, eventually causing the pin to fracture.
It is the purpose of the invention to reduce the tendency of such pins to crack, The present invention provides a device for connecting the track-links of a crawler-track vehicle having pins mounted in rubber in eyes in said track-links, connected positively and frictionally, wherein said pins, and said eyes have peripherally stepless cross-sections of non-circular form, the cross-section of said pins being constant throughout the entire length thereof.
As compared with ]snown tracks, the favourable bearing profile, and elimination of the notch-effect, make it possible to use pins substantially smaller in cross-section, which results in correspondingly lighter tracks of ~3~.2~35~
lesser structural height. In addition to the advantages of cost and weight saving, tracks of this kind also have a favourable effect upon the aesign of all of the driving, steering and braking elements of a vehicle.
By selecting a cross~section formed by six arcuate sections which ;~
are alternately Or two differe~t radii, a bearing ratio close to the optimum and a minimal risk of the pins fracturing as a result of notch-effect.
Embodimentsof the invention are illustrated, by way of example only and in the drawing attached hereto, wherein:
Figures 1, la and lb show respectively a side elevation, an end-elevation and a cross-section of a pin;
Figures 2 and 3 show a plan view in part-section and a side eleva-tion o* a connector link for a two-hinge-pin track;
Figures 4 and 4a are two vlews in part section of a one-hinge-pin track;
Figures 5-7 show different pin cross-sections.
The pin according to Figures 1, la, lb has a non-circular cross-section 2, consisting of six sections of arcs with two different radii 3,~, on centres displaced at an angle 5 = 120 in relation to each other and being eymmetrical with respect to the geometric centre of area A of the cross sec-tion 2.
According to Figure 1, the cross section 2 extends over the entire length Or the pin 1. However, the cross-section 2 may also be provided only at the connecting locations 7,8 of the connectors 9,~O shown in Figures 2,
3,4,~a The end-faces of pins 1 are pro~ided with slots 12 used to set the correct assembly-position in a track element. ~he pins are provided with rubber bushings which are vulcanized-on in kno~n manner, so that the pins pressed into the track elements "float" in rubber.
According to Figures 2~3, in a track of the two-hinge-pin type, link 9 is in the form of a double clamp with eyes or recesses 13 correspond-ing to predetermined cross-section 2 o~ pins 1. Furthermore, a continuous recess 14 and a bore 15 are provided for the attachment o~ link 9 to pin 1 by means o* a ~astener or clamping device 17,19, as shown in Figure ~.
For fitting the link 9 to pins 1, ~hich are rubber-mounted in the track elements in a manner not shown, the link 9 must be slipped onto the pins 1, as shown in Figure 3~ after which it is secured by the clamping de-vice 17,18. Pins 1 are thus securea and cannot rotate in the cormec-tor link 9. -A link 10 in Figures 4, 4a is in the form o~ a single clamp, havine a bore 15 as described in connection with Figure 2 and a recess 13a, the shape o~ which corresponds to that of pin cross-section 2 described in con-nection with Figure lb.
Shown in dotted lines in Figure 4a are a pin 1 ~nd part of a track-element 20, having a bore 197 o~ a kno~n one-hinge-pin type track. Pin 1 is a good fit in recess 13a and in track element 20, whereas there is play on each side between track-element 20 and link 10.
When the link 10 is tightened by means of the clamping device con-sisting of bolt 17 and sleeve 18, the legs 24,25 take up the clearance 23 and are pressed against the track-element 20. The wall o* recess 13a is also applied under pressure to pin 1 which can now no longer rotate under load.
A stop for the sleeve 18, which has a hexagonal head 26, is provided on link 10 in the *orm of a rib 27. ;~
Figures 5 - 7 show pin cross-sections 30,31,32 in the form o~ an octagon 33 with radii 34, an ellipse 35, and a square 36 with radii 37. The recesses in the relevant connector links (not shown) are desiened to match these cross-sections.
_ 3 _ ,~
:, ; ;; ;, .. .
According to Figures 2~3, in a track of the two-hinge-pin type, link 9 is in the form of a double clamp with eyes or recesses 13 correspond-ing to predetermined cross-section 2 o~ pins 1. Furthermore, a continuous recess 14 and a bore 15 are provided for the attachment o~ link 9 to pin 1 by means o* a ~astener or clamping device 17,19, as shown in Figure ~.
For fitting the link 9 to pins 1, ~hich are rubber-mounted in the track elements in a manner not shown, the link 9 must be slipped onto the pins 1, as shown in Figure 3~ after which it is secured by the clamping de-vice 17,18. Pins 1 are thus securea and cannot rotate in the cormec-tor link 9. -A link 10 in Figures 4, 4a is in the form o~ a single clamp, havine a bore 15 as described in connection with Figure 2 and a recess 13a, the shape o~ which corresponds to that of pin cross-section 2 described in con-nection with Figure lb.
Shown in dotted lines in Figure 4a are a pin 1 ~nd part of a track-element 20, having a bore 197 o~ a kno~n one-hinge-pin type track. Pin 1 is a good fit in recess 13a and in track element 20, whereas there is play on each side between track-element 20 and link 10.
When the link 10 is tightened by means of the clamping device con-sisting of bolt 17 and sleeve 18, the legs 24,25 take up the clearance 23 and are pressed against the track-element 20. The wall o* recess 13a is also applied under pressure to pin 1 which can now no longer rotate under load.
A stop for the sleeve 18, which has a hexagonal head 26, is provided on link 10 in the *orm of a rib 27. ;~
Figures 5 - 7 show pin cross-sections 30,31,32 in the form o~ an octagon 33 with radii 34, an ellipse 35, and a square 36 with radii 37. The recesses in the relevant connector links (not shown) are desiened to match these cross-sections.
_ 3 _ ,~
:, ; ;; ;, .. .
Claims (6)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A device for connecting the track-links of a crawler-track vehicle having pins mounted in rubber in eyes in said track-links, connected positively and frictionally, wherein said pins, and said eyes have peripherally stepless cross-sections of non-circular form, the cross-section of said pins being constant throughout the entire length thereof.
2. A device according to claim 1, the cross-section of said eye consists of sections of arcs, the centres of curvature of which are eccentric in relation to the geometric centre of area of the cross-section and are spaced at angular intervals of 120° from each other.
3. A device according to claim 1, wherein the cross-section of the pin is formed by sections of arcs, the centres of curvature which are eccentric in relation to the geometric center of area of the cross-section, and are spaced at angular intervals of 120° to each other, the end-faces of the pins having an alignment mark, to facilitate assembly.
4. A device according to claim 1, 2 or 3 wherein said pin cross-section is octagonal with transition-radii.
5. A device according to claim 1, 2 or 3 wherein said pin cross-section is an ellipse.
6. A device according to claim 1, 2 or 3 wherein said pin cross-section is a square with transition-radii.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEP2919930.2-21 | 1979-05-17 | ||
| DE19792919930 DE2919930C2 (en) | 1979-05-17 | 1979-05-17 | Device for connecting chain links for tracked vehicles |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1128587A true CA1128587A (en) | 1982-07-27 |
Family
ID=6070964
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA351,965A Expired CA1128587A (en) | 1979-05-17 | 1980-05-14 | Track-link connector for tracked vehicles |
Country Status (8)
| Country | Link |
|---|---|
| AR (1) | AR222544A1 (en) |
| AT (1) | AT378157B (en) |
| CA (1) | CA1128587A (en) |
| CH (1) | CH644808A5 (en) |
| DE (1) | DE2919930C2 (en) |
| FR (1) | FR2456657A1 (en) |
| GB (1) | GB2051709B (en) |
| SE (1) | SE441353B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3307107C2 (en) * | 1983-03-01 | 1985-01-31 | Diehl GmbH & Co, 8500 Nürnberg | Connecting elements for crawlers based on the two-joint bolt principle |
| DE3405699C2 (en) * | 1983-04-22 | 1985-08-01 | Diehl GmbH & Co, 8500 Nürnberg | Device as an assembly aid on caterpillars for tracked vehicles |
| US5069510A (en) * | 1985-07-03 | 1991-12-03 | General Dynamics Land Systems, Inc. | Center connector for shoe assemblies of track laying vehicle |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2686697A (en) * | 1952-05-22 | 1954-08-17 | Gen Motors Corp | Tread construction |
| DE1111973B (en) * | 1958-04-11 | 1961-07-27 | Diehl K G | Crawler link |
| DE1114401B (en) * | 1959-08-19 | 1961-09-28 | Diehl K G | Crawler link |
| DE1680835B2 (en) * | 1968-01-30 | 1976-09-02 | Diehl Kg, 5630 Remscheid | TRACK CHAIN FOR SWIMMING AND OFF-ROAD TRACKED VEHICLES |
| DE1680325C3 (en) * | 1968-03-16 | 1974-04-25 | Gerlach-Werke Gmbh, 6650 Homburg | Track for all-terrain vehicles, especially armored vehicles |
| DE1950947C3 (en) * | 1969-10-09 | 1973-11-22 | Ruf, Walter, Dipl.-Ing., Bottighofen, Thurgau (Schweiz) | Caterpillar |
| DE2657905C3 (en) * | 1976-12-21 | 1981-03-26 | Ibp Pietzsch Gmbh, 76275 Ettlingen | Connection between the chain links of a crawler belt |
-
1979
- 1979-05-17 DE DE19792919930 patent/DE2919930C2/en not_active Expired
-
1980
- 1980-04-15 CH CH288580A patent/CH644808A5/en not_active IP Right Cessation
- 1980-04-16 AT AT206280A patent/AT378157B/en not_active IP Right Cessation
- 1980-04-23 GB GB8013424A patent/GB2051709B/en not_active Expired
- 1980-05-13 SE SE8003575A patent/SE441353B/en not_active IP Right Cessation
- 1980-05-14 AR AR28101680A patent/AR222544A1/en active
- 1980-05-14 CA CA351,965A patent/CA1128587A/en not_active Expired
- 1980-05-16 FR FR8011006A patent/FR2456657A1/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| ATA206280A (en) | 1984-11-15 |
| FR2456657B1 (en) | 1984-10-26 |
| GB2051709B (en) | 1983-04-20 |
| GB2051709A (en) | 1981-01-21 |
| SE441353B (en) | 1985-09-30 |
| AT378157B (en) | 1985-06-25 |
| DE2919930C2 (en) | 1983-10-27 |
| CH644808A5 (en) | 1984-08-31 |
| FR2456657A1 (en) | 1980-12-12 |
| DE2919930A1 (en) | 1980-11-20 |
| AR222544A1 (en) | 1981-05-29 |
| SE8003575L (en) | 1980-11-18 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |