GB1565818A – Track roller
– Google Patents
GB1565818A – Track roller
– Google Patents
Track roller
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Info
Publication number
GB1565818A
GB1565818A
GB5432876A
GB5432876A
GB1565818A
GB 1565818 A
GB1565818 A
GB 1565818A
GB 5432876 A
GB5432876 A
GB 5432876A
GB 5432876 A
GB5432876 A
GB 5432876A
GB 1565818 A
GB1565818 A
GB 1565818A
Authority
GB
United Kingdom
Prior art keywords
bearing
track
track roller
bore
roller
Prior art date
1976-01-05
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
Application number
GB5432876A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fiat Allis Construction Machinery Inc
Original Assignee
Fiat Allis Construction Machinery Inc
Priority date (The priority date 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 date listed.)
1976-01-05
Filing date
1976-12-30
Publication date
1980-04-23
1976-12-30
Application filed by Fiat Allis Construction Machinery Inc
filed
Critical
Fiat Allis Construction Machinery Inc
1980-04-23
Publication of GB1565818A
publication
Critical
patent/GB1565818A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
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
B62D55/14—Arrangement, location, or adaptation of rollers
B62D55/15—Mounting devices, e.g. bushings, axles, bearings, sealings
Description
(54) TRACK ROLLER
(71) We, FIAT-ALLIS CONSTRUC
TION MACHINERY, INC., a Corporation organized under the laws of the State of
Delaware, United States of America, of
Box F, 106 Wilmot Road, Deerfield, State of Illinois, United States of America, do hereby declare the invention, for which we pray that a patent may be granted to us, and the method by which it is to be performed, to be particularly described in and by the following statement:
This invention is concerned with an improved track roller for supporting vehicle weight on the endless tracks of a tracklaying or crawler-type vehicle, and particularly with track rollers of the type utilizing anti-friction bearing means.
More specifically this invention is concerned with an improved track roller in which bearing means are positioned within a bearing bore a distance sufficient to overcome the adverse effects of bearing bore growth caused by track roller bellmouthing.
In crawler-type vehicles, wherein interconnected track links support the vehicle weight by track rollers, a track roller shell is carried upon a stationary track roller shaft by means of bearing assemblies, usually tapered roller bearings. The roller shell is formed with a rim portion which engages the track links as they pass thereunder in an endless path of movement. During operation of such crawler type vehicles, the rim of the roller shell is subjected to extremely heavy impact sufficient to cause it to become enlarged and flared, a deteriorating condition known in the industry as bellmouthing. The mechanical working of the rim which causes bell-mouthing not only creates problems with the tracking of the track links, but also causes the bore in which the support bearings are pressed fit, to enlarge. Such bore growth results in separation between the hub and bearing cup so that a loose bearing fit is produced. This loose fit allows the bearing cup to rotate in the bore resulting in the destruction of the bearing and additional damage to the bearing bore.
One attempted solution to this problem has been to use so-called friction-type bushings which are not as seriously influenced by bore growth as anti-friction bearings.
Such use of friction-type bushings has not been satisfactory because bushed rollers have greater rolling resistance than roller bearing resulting in decreased overall operating efficiency of the vehicle.
It is, therefore, an object of this invention to provide an improved track roller.
Another object of this invention is to provide a track roller construction which will prevent destruction of the track roller bearing assemblies and bearing bore caused by mechanical working of the track links adjacent the rim of the roller shell.
According to the invention thereis provided a track roller for supporting vehicle weight on the track links of a track-laying vehicle comprising:
track roller shell means having an outer portion for engaging track links passing adjacent thereto and an inner bearing bore for fixedly securing bearing means therein;
a track roller shaft supporting said track roller shell means for rotational movement thereabout;
bearing means having inner and outer bearing races and carried within said bearing bore upon said track roller shaft for rotational movement of said track roller shell means about said track roller shaft; and
said bearing means positioned within said bearing bore such that substantially all of said outer bearing race is located inwardly in an axial direction from said outer portion for engaging track links of said track roller shell means.
Preferably said bearing means is positioned within said bearing bore such that the centre (as hereinbefore defined) of said bearing means is spaced laterally inward of the longitudinal axis of track links passing, in use, in adjacent contact with the outer portions of said track roller shell means.
Preferably said bearing means is positioned within said bearing bore such that the centre (as hereinbefore defined) of said bearing means is spaced laterally inward of the outer portion of said track roller shell means engaged, in use, by track links passing in adjacent contact therewith.
Preferably said bearing means includes tapered roller bearings carried between inner and outer races with the inner bearing race secured on said track roller shaft and the outer bearing race secured in said bearing bore.
Preferably there is included means for providing an axially directed loading force against said bearing means.
Preferably there are further included sealing means for sealing said bearing means during operation of the track roller.
Preferably said bearing means comprises tapered bearing means carried within said bearing bore upon said track roller shaft in a cone-adjust configuration for effecting rotational movement of said track roller shell means about said track roller shaft.
The invention will now be described in detail and is illustrated. by way of example, in the accompanying diagrammatic drawings in which:
Figure 1 is a perspective view of a track roller being used to engage track links of an endless track: and
Figure 2 is a partial cross section view of the track roller shown in Figure 1, with portions removed, to better illustrate the positioning of the tapered roller bearings within the bearing bore.
Referring to the drawings. and particularly to Figure 1. there is shown a track roller
100 in vehicle weight supporting relationship with a track link 10 forming one of a plurality of interconnected track links 10 of an endless track which passes adjacent to and in contact with a rim 109 of the track roller. A flange 108 is formed at each outer end of the track roller to maintain the passing track links in proper alignment or tracking.
The track roller is shown having two axially-spaced rim portions 109 for engaging spaced portions of each track link 10. The construction of this part of each track roller forms no part of the present invention.
The track roller 100. shown in detail in
Figure 2, comprises a shell 110 which is supported from a crawler-type vehicle bv means of a stationary or dead shaft 120
appropriately secured to the vehicle to
prevent rotation such as by bolting the shaft
120 to appropriate frame members. The
track roller shell 110 is rotatably supported
on the stationary shaft 120 by means of two
tapered roller bearing assemblies 112 each
carried within a bearing bore 115 of a
predetermined size. Each bearing assemblie
112 is press-fitted into its bearing bore with
the inner race or cone assembly 111 secured
to the stationary shaft and the outer race or
bearing cup 113 secured in the bearing bore
115 against the track roller shell to permit
rotation of the roller shell 110 about the
stationary shaft 120.
A preload force is applied to the bearing
assemblies 112 in an axial direction by
means of a washer 121 secured to the shaft
120 applying a force against the bearing
cone 111 through tightening of a lock nut
122 threaded on the shaft 120 in a manner commonlv known in the art.
The bearing assemblies 112 are sealed to
prevent entry of dirt, mud, or other debris
which is always present in operational en
vironment bv means of a retainer 117
secured to the track roller shell 110 acting in
cooperation with another retainer 118 fixed
to the stationary shaft 120 with an appropri
ate seal 119 between the two retainers 30
that these materials are prevented from
entering into the bearing assemblies 112. A
plurality of cap screws are provided in
retainer 11X to assist in removing the retain
er from the support shaft 120 in the event it
becomes necessary to repack the bearing
assemblies 112.
During operation of the crawler vehicle,
as the track links 10 each pass in contact
with the rim portions 109 of the track roller
shell 110, the track roller shell is subjected
to heavy impact loading as previously dis
cussed. This impact of the links 10 upon the
track roller shell 110 causes the rim portions
109 to become enlarged. or as referred to in
the industry as bellmouthing. This bellmou
thing has the effect of causing the bearing
bore to enlarge. The greatest increase in
bearing bore diameter occurs at the end of
the roller in the area beneath the point of
contact between the track links and the
track roller and decreases toward the center
of the track roller, that portion removed
from the impact area. The tapered roller
bearing assemblies 112 are each press-fitted
into the respective bearing bore 115 to a
position inward from the contact area where
the track links 10 impace against the track
roller shell 11t).
As best shown in Figure 7, the bearing
centre of each of the tapered roller bearing
assemblies 112, defined, as recognized in
the bearing art, as a point 130 on the bore
centre line 131 crossed by a line 132 drawn at right angles from the centre of the bearing roller, is spaced substantially axially inward from the centre of the impact area or the longitudinal centre line 133 of each track link 10 as it passes in contact with the rim portions 109 of the track roller shell. Preferably the bearing centre 130 of each bearing assemblies 112 is spaced at or inward from its respective rim portion 109 of the roller shell which contacts the track links. Such positioning of the tapered roller bearing assemblies 112 has been found to permit the satisfactory use of anti-friction press-fitted bearings. Since the bore growth problem is overcome, the press fit of the bearing assemblies remains sufficient to prevent rotation of the bearing cup 113 and even results in an increase in the press fit at the inner end of the bearing cup.
WHAT WE CLAIM IS:
1. A track roller for supporting vehicle weight on the track links of a track-laying vehicle comprising:
track roller shell means having an outer portion for engaging track links passing adjacent thereto an an inner bearing bore for fixedly securing bearing means therein;
a track roller shaft supporting said track roller shell means for rotational movement thereabout;
bearing means having inner and outer bearing races and carried within said bearing bore upon said track roller shaft for rotational movement of said track roller shell means about said track roller shaft: and
said bearing means positioned within said bearing bore such that substantially all of said outer bearing race is located inwardly in an axial direction from said outer portion for engaging track links of said track roller shell means.
2. A track roller according to claim 1, wherein said bearing means is positioned within said bearing bore such that the centre (as hereinbefore defined) of said bearing means is spaced laterally inward of the longitudinal axis of track links passin, in use, in adjacent contact with the outer portions of said track roller shell means.
3. A track roller according to claim 2.
wherein said bearing means is positioned within said bearing bore such that the centre (as hereinbefore defined) of said bearing means is spaced laterally inward of the outer portion of said track roller dhell means engaged, in use, by track links passing in adjacent contact therewith.
4. A track roller according to claim 1. 2, or 3, wherein said bearing means includes tapered roller bearings carried between inner and outer bearing races with the inner bearing race secured on said track roller shaft and the outer bearing race secured in said bearing bore.
5. A track roller according to claim 1,2,3 or 4, including means for providing an axially directed loading force against said bearing means.
6. A track roller according to any one of claims 1 to 5, further including sealing means for sealing said bearing means during operation of the track roller.
7. A track roller according to any one of claims 1 to 6, wherein said bearing means comprises tapered bearing means carried within said bearing bore upon said track roller shaft in a cone-adjust configuration for effecting rotational movement of said track roller shell means about said track roller shaft.
8. A track roller for supporting vehicle weight on the track links of a track-lying vehicle constructed and arranged substantially as herein described with reference to, and as shown in, the accompanying drawings.
**WARNING** end of DESC field may overlap start of CLMS **.
Claims (8)
**WARNING** start of CLMS field may overlap end of DESC **. at right angles from the centre of the bearing roller, is spaced substantially axially inward from the centre of the impact area or the longitudinal centre line 133 of each track link 10 as it passes in contact with the rim portions 109 of the track roller shell. Preferably the bearing centre 130 of each bearing assemblies 112 is spaced at or inward from its respective rim portion 109 of the roller shell which contacts the track links. Such positioning of the tapered roller bearing assemblies 112 has been found to permit the satisfactory use of anti-friction press-fitted bearings. Since the bore growth problem is overcome, the press fit of the bearing assemblies remains sufficient to prevent rotation of the bearing cup 113 and even results in an increase in the press fit at the inner end of the bearing cup. WHAT WE CLAIM IS:
1. A track roller for supporting vehicle weight on the track links of a track-laying vehicle comprising:
track roller shell means having an outer portion for engaging track links passing adjacent thereto an an inner bearing bore for fixedly securing bearing means therein;
a track roller shaft supporting said track roller shell means for rotational movement thereabout;
bearing means having inner and outer bearing races and carried within said bearing bore upon said track roller shaft for rotational movement of said track roller shell means about said track roller shaft: and
said bearing means positioned within said bearing bore such that substantially all of said outer bearing race is located inwardly in an axial direction from said outer portion for engaging track links of said track roller shell means.
2. A track roller according to claim 1, wherein said bearing means is positioned within said bearing bore such that the centre (as hereinbefore defined) of said bearing means is spaced laterally inward of the longitudinal axis of track links passin, in use, in adjacent contact with the outer portions of said track roller shell means.
3. A track roller according to claim 2.
wherein said bearing means is positioned within said bearing bore such that the centre (as hereinbefore defined) of said bearing means is spaced laterally inward of the outer portion of said track roller dhell means engaged, in use, by track links passing in adjacent contact therewith.
4. A track roller according to claim 1. 2, or 3, wherein said bearing means includes tapered roller bearings carried between inner and outer bearing races with the inner bearing race secured on said track roller shaft and the outer bearing race secured in said bearing bore.
5. A track roller according to claim 1,2,3 or 4, including means for providing an axially directed loading force against said bearing means.
6. A track roller according to any one of claims 1 to 5, further including sealing means for sealing said bearing means during operation of the track roller.
7. A track roller according to any one of claims 1 to 6, wherein said bearing means comprises tapered bearing means carried within said bearing bore upon said track roller shaft in a cone-adjust configuration for effecting rotational movement of said track roller shell means about said track roller shaft.
8. A track roller for supporting vehicle weight on the track links of a track-lying vehicle constructed and arranged substantially as herein described with reference to, and as shown in, the accompanying drawings.
GB5432876A
1976-01-05
1976-12-30
Track roller
Expired
GB1565818A
(en)
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
US64660476A
1976-01-05
1976-01-05
Publications (1)
Publication Number
Publication Date
GB1565818A
true
GB1565818A
(en)
1980-04-23
Family
ID=24593721
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB5432876A
Expired
GB1565818A
(en)
1976-01-05
1976-12-30
Track roller
Country Status (8)
Country
Link
JP
(1)
JPS5284652A
(en)
AU
(1)
AU509168B2
(en)
BR
(1)
BR7608827A
(en)
CA
(1)
CA1060514A
(en)
DE
(1)
DE2658261A1
(en)
FR
(1)
FR2337071A1
(en)
GB
(1)
GB1565818A
(en)
IT
(1)
IT1065371B
(en)
Cited By (1)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
EP3748181A1
(en)
*
2019-05-14
2020-12-09
Everpads Co., Ltd.
Track roller assembly
Families Citing this family (1)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
JPS588956A
(en)
*
1981-07-10
1983-01-19
株式会社システム・ホ−ムズ
Heat pump type air conditioner
Family Cites Families (4)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
GB113726A
(en)
*
1900-01-01
FR517868A
(en)
*
1918-03-02
1921-05-14
Hugo E Bremer
Sealing seal for ball and roller bearings
US2990220A
(en)
*
1959-10-12
1961-06-27
Malone Joseph
Bearing retainer and seal structure for tractor track roller
US3843214A
(en)
*
1972-10-12
1974-10-22
Caterpillar Tractor Co
Adjustable track roller assembly
1976
1976-12-13
CA
CA267,723A
patent/CA1060514A/en
not_active
Expired
1976-12-20
AU
AU20725/76A
patent/AU509168B2/en
not_active
Expired
1976-12-21
IT
IT3071276A
patent/IT1065371B/en
active
1976-12-22
DE
DE19762658261
patent/DE2658261A1/en
not_active
Withdrawn
1976-12-25
JP
JP15732776A
patent/JPS5284652A/en
active
Pending
1976-12-29
FR
FR7639372A
patent/FR2337071A1/en
active
Granted
1976-12-30
GB
GB5432876A
patent/GB1565818A/en
not_active
Expired
1976-12-30
BR
BR7608827A
patent/BR7608827A/en
unknown
Cited By (1)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
EP3748181A1
(en)
*
2019-05-14
2020-12-09
Everpads Co., Ltd.
Track roller assembly
Also Published As
Publication number
Publication date
DE2658261A1
(en)
1977-07-14
AU509168B2
(en)
1980-04-24
IT1065371B
(en)
1985-02-25
JPS5284652A
(en)
1977-07-14
BR7608827A
(en)
1977-10-25
FR2337071B1
(en)
1982-10-08
AU2072576A
(en)
1978-06-29
CA1060514A
(en)
1979-08-14
FR2337071A1
(en)
1977-07-29
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Legal Events
Date
Code
Title
Description
1980-07-09
PS
Patent sealed
1983-08-17
PCNP
Patent ceased through non-payment of renewal fee
