CA1154055A - Rubber-mounted pins for crawler tracks - Google Patents
Rubber-mounted pins for crawler tracksInfo
- Publication number
- CA1154055A CA1154055A CA000383114A CA383114A CA1154055A CA 1154055 A CA1154055 A CA 1154055A CA 000383114 A CA000383114 A CA 000383114A CA 383114 A CA383114 A CA 383114A CA 1154055 A CA1154055 A CA 1154055A
- Authority
- CA
- Canada
- Prior art keywords
- bore
- bushings
- rubber
- pin
- 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
- B62D55/088—Endless track units; Parts thereof with means to exclude or remove foreign matter, e.g. sealing means, self-cleaning track links or sprockets, deflector plates or scrapers
- B62D55/0887—Track-articulation sealings against dust, water, mud or the like
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
- Springs (AREA)
- Tires In General (AREA)
- Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
- Bolts, Nuts, And Washers (AREA)
- Vehicle Body Suspensions (AREA)
Abstract
ABSTRACT
The durability of resiliently mounted pins for crawler tracks having vulcanized rubber bushings pressed into a bore in the track link, is increased by bonding the rubber rings to the wall of the hole bore by a layer of adhesive. In place of the existing tubular material, namely steel, and of the existing rubber bushings, it is possible to use other pairs of materials having lower coefficients of friction than those used heretofore, such as plastics, fibre-reinforced plastics, and non-ferrous metals for the track links, and elastomers other than rubber for the resilient bushings.
The durability of resiliently mounted pins for crawler tracks having vulcanized rubber bushings pressed into a bore in the track link, is increased by bonding the rubber rings to the wall of the hole bore by a layer of adhesive. In place of the existing tubular material, namely steel, and of the existing rubber bushings, it is possible to use other pairs of materials having lower coefficients of friction than those used heretofore, such as plastics, fibre-reinforced plastics, and non-ferrous metals for the track links, and elastomers other than rubber for the resilient bushings.
Description
11540S~
The invention relates to reslliently mounted pins for crawler tracks having vulcanized rubber bushlngs.
In the case of resiliently mounted crawler tracks, the pins with vulcanized rubber bushings are pressed into bores in the body of the track. As the track travels on the running gear, the pins rotate in relation to the tubular element. The torsional paths produce deformation of the rubber bush-ings by torsional stress. Friction between the rubber bushings and the wall of the bore of the tubular element prevents the bushings from slipping - cf., in this connection, the two-hinge-pin type crawler track according to German Utility Model 19 05 877.
In the case of crawler tracks of the single hlnge-pin type according to German OS 27 55 412, the angle of rotation ocurring as the track passes over the deflecting wheel of the running gear is twice as large as in the case of a track of the two-hinge-pin type. As a result of this, the friction present, r ~ up to certain angle of rotation, bet~een the prestressed rubber bushings and the wall of the bore in the tubular element is o~ercome, and the bushings slip.
This has the disadvantage of causing rapid wear of the bushings due to excessivefrictional heat and frictional wear, with increasing destruction of the struc-ture o the rubber. The unprotected pln then begins to rub agalnst the bore, 2Q initiall~ against the edges of the bore in the tubular element ~steel against , steel), and this finall~ c~uses the pin to fail.
It is the purpose of the invention to prevent slipping of the pre-i .
stressed rubber bushings as a result o the larger angles oP rotation arising ~, in tracks of the single hinge-pin type. It is urthermore a purpose of the ~i ` invention to increase the durability of the rubber mounting of the pins of crawler tracks, especiall~ in the case of tracks of the two-hinge-pin type.
This purpose is achieved by bonding the rubber bushings to the wall of the bore b~ means of a la~er of adhesive. The advantage of this is that~a . "
.
, .
-' ~
. ` ~: . : . ' ' ~
" ~15~05S
non-slip arrangement of the bushings is obtained when the material now used for the tubular element, namely steel, and the rubber now used for the bushings are replaced by other pairs of materials, for example plastics, fibre-reinforced plastics and non-ferrous metals, for the tracks and elastomers other than rubberfor the bushings. It is therefore significant that, according to the invention, it is possible to use pairs o~ material having lower coefficients of friction than heretofore.
The invention provides a resilientl~ mounted pin, having vulcanized rubber bushings, for crawler tracks, which is pressed into a bore provided for ~J t/ o~J f h~t`~7'",~, B lo such a pin in a track link, wherein said rubber bushings are bondedlto the wall of said bore by means of a la~er of adhesive.
The invention also provides a method for producing resilient bushings bonded into a bore in a crawler track element and vulcanized to a pin, chara-cterized by the following steps:
1~ the wall of the bore is degreased and the adhesive is applied thereto;
The invention relates to reslliently mounted pins for crawler tracks having vulcanized rubber bushlngs.
In the case of resiliently mounted crawler tracks, the pins with vulcanized rubber bushings are pressed into bores in the body of the track. As the track travels on the running gear, the pins rotate in relation to the tubular element. The torsional paths produce deformation of the rubber bush-ings by torsional stress. Friction between the rubber bushings and the wall of the bore of the tubular element prevents the bushings from slipping - cf., in this connection, the two-hinge-pin type crawler track according to German Utility Model 19 05 877.
In the case of crawler tracks of the single hlnge-pin type according to German OS 27 55 412, the angle of rotation ocurring as the track passes over the deflecting wheel of the running gear is twice as large as in the case of a track of the two-hinge-pin type. As a result of this, the friction present, r ~ up to certain angle of rotation, bet~een the prestressed rubber bushings and the wall of the bore in the tubular element is o~ercome, and the bushings slip.
This has the disadvantage of causing rapid wear of the bushings due to excessivefrictional heat and frictional wear, with increasing destruction of the struc-ture o the rubber. The unprotected pln then begins to rub agalnst the bore, 2Q initiall~ against the edges of the bore in the tubular element ~steel against , steel), and this finall~ c~uses the pin to fail.
It is the purpose of the invention to prevent slipping of the pre-i .
stressed rubber bushings as a result o the larger angles oP rotation arising ~, in tracks of the single hinge-pin type. It is urthermore a purpose of the ~i ` invention to increase the durability of the rubber mounting of the pins of crawler tracks, especiall~ in the case of tracks of the two-hinge-pin type.
This purpose is achieved by bonding the rubber bushings to the wall of the bore b~ means of a la~er of adhesive. The advantage of this is that~a . "
.
, .
-' ~
. ` ~: . : . ' ' ~
" ~15~05S
non-slip arrangement of the bushings is obtained when the material now used for the tubular element, namely steel, and the rubber now used for the bushings are replaced by other pairs of materials, for example plastics, fibre-reinforced plastics and non-ferrous metals, for the tracks and elastomers other than rubberfor the bushings. It is therefore significant that, according to the invention, it is possible to use pairs o~ material having lower coefficients of friction than heretofore.
The invention provides a resilientl~ mounted pin, having vulcanized rubber bushings, for crawler tracks, which is pressed into a bore provided for ~J t/ o~J f h~t`~7'",~, B lo such a pin in a track link, wherein said rubber bushings are bondedlto the wall of said bore by means of a la~er of adhesive.
The invention also provides a method for producing resilient bushings bonded into a bore in a crawler track element and vulcanized to a pin, chara-cterized by the following steps:
1~ the wall of the bore is degreased and the adhesive is applied thereto;
2~ the pin with the vulcanized rubber bushings is pressed into the ~ore with the aid of a lubricant;
3~ the track element fitted with the pin is stored for about 70 hours.
An embodiment of the invention is illustrated by way of example only, in the drawing attached hereto, wherein:
Figure 1 shows a partially sectloned simplified detail of a crawler track according to the single hinge-pin principle;
Figure 2 shows detail A in Figure 1 to an enlarged scale;
Figure 3 shows a pin equipped with rubber rings being pressed into the hore in body of the track.
According to Figure 1 a maximal angle of rotation 3 exists between two crawler track links 1, 2 as it rotates about the deflector-wheel ~not ~, ~
~ -2`
.
~ . . - .
. . .
.
.
liS4(~5S
shown). In the follo~ing description of the connecting parts for these links 1 J 2 such as cams and clamp fittings, only one connecting part is described.
Many connecting parts of this kind are provided, the number thereof being gov-erned by, among other things, the tensile force to be transmitted by the track.
Integral with the ends of track links 1, 2 are lugs 4, 5 ~o which a clamp fitting 10 is secured by a threaded fastener 11, 12. Clamp fitting 10 grips the free end 13, 14 of the pin shown in Figure 3. Other steps, of which no further mention is made here, are taken to ensure that clamp fitting 10 is secured positively and frictionally to pin 15 and that track links 1, 2 track correctly. Rubber bushings 20-23 are vulcanized to the pin. A layer of ad-hesive 26 ~see Figure 2) ensures that the bushings adhere to the wall 24 of bore 25, the free diameter 35 of the said bushings being larger than the diameter 36 of said bore. The rubber bushings are deformed as they are pressed into the bore, in such a manner that spaces 37, 37' ~Figure 3) between the bushings are filled, and the bushings are prestressed.
As shown in Figure 2, the layer of adhesive 26 is applied to wall 24 of tubular element l. The adhesive may be a one- or two-component material, such as a cold curing vulcanizate or bonding agent known per se.
Figure 3 illustrates the steps required to secure the bushings 23-23 against rotation in the bore 25 in track link 1.
1) Bore 25 is degreased and a layer of adhesive 26 is applied thereto.
2) Pin 15, with vulcanized rubber bushings 20-23 is pressed into bore 25 with the aid oE a lubricant (not shown) lntroduced in the direction of the arrow 31, the lubricant being an oil compatible with rubber.
3) After the pin 15 has been inserted, the track links 1, 2 are stored for about 70 hours at room temperature, while the reaction takes place between the layer of adhesive and the rubber bushings.
-` 115~ 5S
This bonding of the rubber bushings into the bores in the track links is readil~ applicable to spring-elements subjected to torsion or thrust~
preferabl~ to spring-elements, the rubbers of which are prestressed between metal parts. An example of this is the spring-element used in the vicinity of the rear-axle of an automotive vehicle.
.
.
_~_ , :.. ,.. ~ .
''
An embodiment of the invention is illustrated by way of example only, in the drawing attached hereto, wherein:
Figure 1 shows a partially sectloned simplified detail of a crawler track according to the single hinge-pin principle;
Figure 2 shows detail A in Figure 1 to an enlarged scale;
Figure 3 shows a pin equipped with rubber rings being pressed into the hore in body of the track.
According to Figure 1 a maximal angle of rotation 3 exists between two crawler track links 1, 2 as it rotates about the deflector-wheel ~not ~, ~
~ -2`
.
~ . . - .
. . .
.
.
liS4(~5S
shown). In the follo~ing description of the connecting parts for these links 1 J 2 such as cams and clamp fittings, only one connecting part is described.
Many connecting parts of this kind are provided, the number thereof being gov-erned by, among other things, the tensile force to be transmitted by the track.
Integral with the ends of track links 1, 2 are lugs 4, 5 ~o which a clamp fitting 10 is secured by a threaded fastener 11, 12. Clamp fitting 10 grips the free end 13, 14 of the pin shown in Figure 3. Other steps, of which no further mention is made here, are taken to ensure that clamp fitting 10 is secured positively and frictionally to pin 15 and that track links 1, 2 track correctly. Rubber bushings 20-23 are vulcanized to the pin. A layer of ad-hesive 26 ~see Figure 2) ensures that the bushings adhere to the wall 24 of bore 25, the free diameter 35 of the said bushings being larger than the diameter 36 of said bore. The rubber bushings are deformed as they are pressed into the bore, in such a manner that spaces 37, 37' ~Figure 3) between the bushings are filled, and the bushings are prestressed.
As shown in Figure 2, the layer of adhesive 26 is applied to wall 24 of tubular element l. The adhesive may be a one- or two-component material, such as a cold curing vulcanizate or bonding agent known per se.
Figure 3 illustrates the steps required to secure the bushings 23-23 against rotation in the bore 25 in track link 1.
1) Bore 25 is degreased and a layer of adhesive 26 is applied thereto.
2) Pin 15, with vulcanized rubber bushings 20-23 is pressed into bore 25 with the aid oE a lubricant (not shown) lntroduced in the direction of the arrow 31, the lubricant being an oil compatible with rubber.
3) After the pin 15 has been inserted, the track links 1, 2 are stored for about 70 hours at room temperature, while the reaction takes place between the layer of adhesive and the rubber bushings.
-` 115~ 5S
This bonding of the rubber bushings into the bores in the track links is readil~ applicable to spring-elements subjected to torsion or thrust~
preferabl~ to spring-elements, the rubbers of which are prestressed between metal parts. An example of this is the spring-element used in the vicinity of the rear-axle of an automotive vehicle.
.
.
_~_ , :.. ,.. ~ .
''
Claims (3)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A resiliently mounted pin, having vulcanized rubber bushings for crawler tracks, which is pressed into a bore provided for such a pin in a track link, wherein said rubber bushings are bonded without heating to the wall of said bore by means of a layer of adhesive.
2. A resiliently mounted pin according to claim 1, wherein the layer of adhesive consists of a cold curing vulcanizate or bonding agent.
3. A method for producing resilient bushings bonded into a bore in a crawler track element and vulcanized to a pin, characterized by the following steps:
1) the wall of the bore is degreased and the adhesive is applied thereto;
2) the pin with the vulcanized rubber bushings is pressed into the bore with the aid of a lubricant;
3) the track element fitted with the pin is stored for about 70 hours.
1) the wall of the bore is degreased and the adhesive is applied thereto;
2) the pin with the vulcanized rubber bushings is pressed into the bore with the aid of a lubricant;
3) the track element fitted with the pin is stored for about 70 hours.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEP3033086.0-21 | 1980-09-03 | ||
| DE3033086A DE3033086C2 (en) | 1980-09-03 | 1980-09-03 | Rubber-mounted bolt for caterpillars |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1154055A true CA1154055A (en) | 1983-09-20 |
Family
ID=6110990
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000383114A Expired CA1154055A (en) | 1980-09-03 | 1981-08-04 | Rubber-mounted pins for crawler tracks |
Country Status (14)
| Country | Link |
|---|---|
| JP (1) | JPS5747261A (en) |
| AR (1) | AR231422A1 (en) |
| AT (1) | AT384406B (en) |
| BE (1) | BE889279A (en) |
| CA (1) | CA1154055A (en) |
| CH (1) | CH653300A5 (en) |
| DE (1) | DE3033086C2 (en) |
| DK (1) | DK152943C (en) |
| FR (1) | FR2489233A1 (en) |
| GB (1) | GB2083163B (en) |
| IL (1) | IL63564A0 (en) |
| NL (1) | NL8102954A (en) |
| NO (1) | NO812179L (en) |
| SE (1) | SE8104992L (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3246935A1 (en) * | 1982-12-18 | 1984-06-20 | Diehl GmbH & Co, 8500 Nürnberg | DEVICE FOR CONNECTING CHAIN LINKS FOR CHAIN VEHICLES |
| WO1985005579A1 (en) * | 1984-05-31 | 1985-12-19 | Caterpillar Tractor Co. | Track joint and method of assembling same |
| DE3732586A1 (en) * | 1987-09-28 | 1989-04-20 | Diehl Gmbh & Co | RUBBER BEARING FOR BOLTS OF TRACK AND CHAIN TRACKS OF VEHICLES |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB599157A (en) * | 1945-07-09 | 1948-03-05 | Gilbert Holm Swart | Resilient joints or mountings and method of making same |
| FR854082A (en) * | 1938-12-09 | 1940-04-04 | Automobiles Unic Soc Nouv | Friction articulation device particularly applicable to track elements |
| GB645415A (en) * | 1947-12-08 | 1950-11-01 | Roadless Traction Ltd | Improvements in vehicular endless tracks of the driven locked girder type |
| DE1905877U (en) * | 1964-05-11 | 1964-12-03 | Schmiede Und Stanzwerk Halver | TRACK LINK ON CONNECTOR AND HINGE CHAINS FOR TRACK VEHICLES, IN PARTICULAR TANK. |
| US3387839A (en) * | 1964-12-11 | 1968-06-11 | Gen Tire & Rubber Co | Adhesive bonded bushing and method of making same |
| DE2755412C3 (en) * | 1977-12-13 | 1982-02-11 | Diehl GmbH & Co, 8500 Nürnberg | Device for connecting the warp bodies of a crawler belt |
-
1980
- 1980-09-03 DE DE3033086A patent/DE3033086C2/en not_active Expired
-
1981
- 1981-06-18 BE BE2/59225A patent/BE889279A/en not_active IP Right Cessation
- 1981-06-19 NL NL8102954A patent/NL8102954A/en not_active Application Discontinuation
- 1981-06-25 NO NO812179A patent/NO812179L/en unknown
- 1981-06-29 DK DK287081A patent/DK152943C/en not_active IP Right Cessation
- 1981-07-01 CH CH4352/81A patent/CH653300A5/en not_active IP Right Cessation
- 1981-07-01 AT AT0293781A patent/AT384406B/en not_active IP Right Cessation
- 1981-07-10 JP JP56108041A patent/JPS5747261A/en active Pending
- 1981-07-30 AR AR286288A patent/AR231422A1/en active
- 1981-08-03 GB GB8123674A patent/GB2083163B/en not_active Expired
- 1981-08-04 CA CA000383114A patent/CA1154055A/en not_active Expired
- 1981-08-07 FR FR8115336A patent/FR2489233A1/en active Granted
- 1981-08-13 IL IL63564A patent/IL63564A0/en not_active IP Right Cessation
- 1981-08-24 SE SE8104992A patent/SE8104992L/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| AT384406B (en) | 1987-11-10 |
| GB2083163A (en) | 1982-03-17 |
| DK152943B (en) | 1988-05-30 |
| DE3033086A1 (en) | 1982-03-18 |
| DK152943C (en) | 1988-10-24 |
| DK287081A (en) | 1982-03-04 |
| FR2489233B1 (en) | 1984-11-23 |
| SE8104992L (en) | 1982-03-04 |
| BE889279A (en) | 1981-10-16 |
| AR231422A1 (en) | 1984-11-30 |
| IL63564A0 (en) | 1981-11-30 |
| FR2489233A1 (en) | 1982-03-05 |
| JPS5747261A (en) | 1982-03-18 |
| ATA293781A (en) | 1987-04-15 |
| DE3033086C2 (en) | 1985-02-07 |
| GB2083163B (en) | 1984-10-31 |
| NL8102954A (en) | 1982-04-01 |
| NO812179L (en) | 1982-03-04 |
| CH653300A5 (en) | 1985-12-31 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |