GB1590466A - Creation of Inventions and Patents with Artificial Intelligence

GB1590466A – Carriages with articulated tracks
– Google Patents

GB1590466A – Carriages with articulated tracks
– Google Patents
Carriages with articulated tracks

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Publication number
GB1590466A

GB1590466A
GB49425/77A
GB4942577A
GB1590466A
GB 1590466 A
GB1590466 A
GB 1590466A
GB 49425/77 A
GB49425/77 A
GB 49425/77A
GB 4942577 A
GB4942577 A
GB 4942577A
GB 1590466 A
GB1590466 A
GB 1590466A
Authority
GB
United Kingdom
Prior art keywords
track
carriage
guide path
figures
rounded ends
Prior art date
1976-12-07
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
GB49425/77A
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.)

Charbonnages de France CDF

Original Assignee
Charbonnages de France CDF
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.)
1976-12-07
Filing date
1977-11-28
Publication date
1981-06-03

1977-11-28
Application filed by Charbonnages de France CDF
filed
Critical
Charbonnages de France CDF

1981-06-03
Publication of GB1590466A
publication
Critical
patent/GB1590466A/en

Status
Expired
legal-status
Critical
Current

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Classifications

E—FIXED CONSTRUCTIONS

E21—EARTH DRILLING; MINING

E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS

E21D23/00—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor

E21D23/08—Advancing mechanisms

E21D23/081—Advancing mechanisms forming parts of the roof supports

E21D23/087—Advancing mechanisms forming parts of the roof supports acting directly on the walls of the seam

E21D23/088—Advancing mechanisms forming parts of the roof supports acting directly on the walls of the seam by means of wheels, rollers, caterpillars, belts or worm screws

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

B62D55/10—Bogies; Frames

Description

PATENT SPECIFICATION
( 11) 0 ( 21) Application No 49425/77 ( 22) Filed 28 Nov 1977 4 ( 31) Convention Application No.
7636768 ( 32) Filed 7 Dec 1976 in C ( 33) France (FR) CO ( 44) Complete Specification published 3 June 1981 ( 51) INT CL 3 B 62 D 55/08 // E 21 D 15/00 ( 52) Index at acceptance B 7 H EIL ( 54) IMPROVEMENTS IN OR RELATING TO CARRIAGES WITH ARTICULATED TRACKS ( 71) We, CHARBONNAGES DE FRANCE, a Public Institution organised and existing under the laws of France, of 9, Avenue Percier, 75008 Paris (Seine), France, 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 relates to a carriage for a machine such as a roof support, which comprises a beam having rounded ends and a straight portion between the rounded ends, and an articulated track encircling the beam and guided in a guide path extending around the beam, the track being guided substantially without play around the rounded return ends of the beam.
Various mine working machines are known which use carriages of this type, for example a level cutting machine as described in French Patent No 1,118,233 or a roof support as described in German Patent Application No 1,139,084.
When machines of this kind have carriages of the type described above, arranged in parallel pairs, for example two upper carriages or two lower carriages of a roof support, there is a problem of how to permit slight turns to the right or left without applying excessive forces to the roof or floor, and of preventing the machine from becoming jammed in any direction.
According to the invention there is provided a carriage for a machine, such as a roof support, comprising a beam having rounded ends and a straight part between the rounded ends, and an articulated track encircling the beam and guided in a guide path extending around the beam, which guide path provides lateral clearance for the track on the straight part of the beam and guides the track substantially without lateral play around the rounded ends of the beam.
In a preferred embodiment this lateral play is provided at each side of at least one and at most two narrowed regions where there is localised reduction of lateral play of the track in the guide path.
The invention may be employed in a roof support which is capable of movement by its own drive mechanism whilst under permanent load, which support comprises at least two parallel pairs of articulated 55 track carriages, one of each pair constituting a lower carriage and the other an upper carriage which are to be applied respectively against the floor and against the roof of a mine gallery by loading means 60 operable by extension under pressure to force apart at least three connecting crossmembers, of which two are between two parallel lower carriages and at least one between two parallel upper carriages of the 65 two parallel pairs of carriages, in which roof support the drive mechanism acts exclusively by action and reaction movement of two members of the support with respect to each other, on one another, as 70 described in United Kingdom Patent No.
766,811.
Some embodiments of the invention will now be described, by way of example, with reference to the accompanying drawings in 75 which: Figures 1 and 2 show, a view of a beam for a carriage from below in the case of a lower carriage and a view from above in the case of an upper carriage, 80 Figures 3 and 4 show similar views of another beam; and Figures 5 and 6 show similar views of yet another beam.
Figures 1 and 2 show a beam for a car 85 riage of a roof support At the ends of the beam a guide path for skids of an articulated track is defined between two pairs of shoulders 1 and 2 at one end and 3 and 4 at the other end thus defining two 90 recesses 5 which define lateral clearance on each side of the track portion 6 which is in contact with the ground or the roof, and which is shown shaded in the drawings.
The path 14 of the track on the ground 95 or the roof is shown in the form of two lines.
The distance separating the two shoulders of each pair is such that each pair guides the track 11 substantially with 90 1 590 466 1 590 466 out play One skid 12, having a guide boss 13, of this articulated track 11 is shown in section.
As will now be explained this special arrangement enables the roof support to travel around a curve.
If during movement of the roof support the movement of one lower carriage and of the upper carriage disposed above it are intentionally interrupted, continuing movement of the other lower carriage and of the other upper carriage tends to cause them to pivot substantially around their centres so that the guide shoulders 1 and 2, Figure 1, push laterally the bosses 13 of the skids 12, which shoulders are situated at the forward end of the beam considered in the direction of advance F of the support, so that the track is guided substantially without play Each new skid of the track is therefore offset laterally relative to the preceding skid as it is laid down, and the succession of skids thus liad down from a curve whose direction is that given by the pivoting of the beam, which is slidingly guided on the skids which are laid down in front of it The beam follows the path of these skids, so that the recesses 5 permit the track to assume the curved shape 14 shown in Figure 2.
The embodiment described above is very suitable for the movement of the roof support and enables the support to travel around a bend in cases where the roof and the floor are regular and substantially horizontal.
In other applications, whether the path is curved or straight, the forces applied to the track skids in contact with the ground may offset them laterally, and this offsetting may be so great that the side faces of the skids rub against the surface of the recess facing the convex edge of the track, which would be detrimental to satisfactory advance of the support and may cause premature wear both of the recess and of the side faces of the skids.
If this occurs while the support is following a straight path, it may subsequently be impossible for the support to move around a curve.
Figures 3 to 6 show preferred modified embodiments enabling these disadvantages to be avoided.
In Figures 3 and 4 the recess existing between the shoulders 1 and 2 at one end and the shoulders 3 and 4 at the other end of the beam is formed with two shoulders 7 defining a narrowed region of a width substantially equal to that of the gaps be 60 tween the shoulders 1 and 2 and between the shoulders 3 and 4.
In Figures 5 and 6 the recess is defined between two pairs of shoulders 8 and 9, the width of the rearward gap between 65 the shoulders 9 which are situated nearer the shoulders 3 and 4, is substantially equal to the distance separating the shoulders 3 and 4, while the width of the gap between the forward shoulders 8 is greater 70 As well as reducing surface contact between the sides of the recesss and the skids, and therefore reducing their time of contact and their wear, these narrowed regions make it possible to avoid lateral offsetting 75 of the beams in relation to the desired path, whether straight or curved.

Claims (4)

WHAT WE CLAIM IS: –

1 A carriage for a machine, such as a roof support, comprising a beam having 80 rounded ends and a straight part between the rounded ends, and an articulated track encircling the beam and guided in a guide path extending around the beam, which guide path provides lateral clearance for 85 the track on the straight part of the beam and guides the track substantially without lateral play around the rounded ends of the beam.

2 A carriage according to Claim 1, 90 wherein the guide path on the straight part of the beam provides said lateral clearance at each side of at least one and at most two narrowed regions where there is localised reduction of lateral play of the 95 track in the guide path.

3 A carriage according to Claim 2, wherein the guide path compries two narrowed regions of unequal widths.

4 A carriage according to Claim 3, 100 wherein the rearward narrowed region is narrower than the forward narrowed region, considered in the direction of advance of the carriage.
A carriage for a machine such as a 105 roof support, substantially as herein described with reference to Figures 1 and 2 or Figures 3 and 4 or Figures 5 and 6 of the accompanying drawings.
PAGE, WHITE & FARRER, Chartered Patent Agents, 27, Chancery Lane, London WC 2 A 1 NT.
Agents for the applicants.
Printed for Her Majesty’s Stationery Office by The Tweeddale Press Ltd, Berwick-upon-Tweed, 1981.
Published at the Patent Office, 25 Southampton Buildings, London, WC 2 A l AY, from which copies may be obtained.

GB49425/77A
1976-12-07
1977-11-28
Carriages with articulated tracks

Expired

GB1590466A
(en)

Applications Claiming Priority (1)

Application Number
Priority Date
Filing Date
Title

FR7636768A

FR2373434A1
(en)

1976-12-07
1976-12-07

FRICTION GUIDED TRACK TROLLEY FOR MACHINE, SUCH AS A SUPPORT PILE

Publications (1)

Publication Number
Publication Date

GB1590466A
true

GB1590466A
(en)

1981-06-03

Family
ID=9180736
Family Applications (1)

Application Number
Title
Priority Date
Filing Date

GB49425/77A
Expired

GB1590466A
(en)

1976-12-07
1977-11-28
Carriages with articulated tracks

Country Status (11)

Country
Link

US
(1)

US4232911A
(en)

JP
(1)

JPS5383902A
(en)

AT
(1)

AT353212B
(en)

BE
(1)

BE861468A
(en)

CA
(1)

CA1075024A
(en)

DE
(1)

DE2753060C2
(en)

FR
(1)

FR2373434A1
(en)

GB
(1)

GB1590466A
(en)

PL
(1)

PL111010B1
(en)

YU
(1)

YU287677A
(en)

ZA
(1)

ZA777089B
(en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party

Publication number
Priority date
Publication date
Assignee
Title

US7900723B2
(en)

2007-01-11
2011-03-08
Glen Brazier
Motorized snowboard

US7784571B2
(en)

2007-01-11
2010-08-31
Glen Brazier
Motorized snowboard

Family Cites Families (7)

* Cited by examiner, † Cited by third party

Publication number
Priority date
Publication date
Assignee
Title

US1316092A
(en)

1919-09-16

Caterpillar-tractor

US1479408A
(en)

1923-03-22
1924-01-01
Lewis K Davis
Endless-track vehicle

US1825075A
(en)

1930-01-10
1931-09-29
Harry A Knox
Flexible track for track laying vehicles

US2484754A
(en)

1946-07-12
1949-10-11
Joseph P Silva
Carriage for trucks

BE535086A
(en)

1954-01-25

DE1139084B
(en)

1960-07-13
1962-11-08
Maschf

Mobile, frame-like longwall member

FR2339057A1
(en)

1976-01-26
1977-08-19
Charbonnages De France

UNIT WALKING SUPPORT

1976

1976-12-07
FR
FR7636768A
patent/FR2373434A1/en
active
Granted

1977

1977-11-28
GB
GB49425/77A
patent/GB1590466A/en
not_active
Expired

1977-11-28
DE
DE2753060A
patent/DE2753060C2/en
not_active
Expired

1977-11-29
ZA
ZA00777089A
patent/ZA777089B/en
unknown

1977-12-01
AT
AT861477A
patent/AT353212B/en
not_active
IP Right Cessation

1977-12-02
BE
BE6046245A
patent/BE861468A/en
unknown

1977-12-05
CA
CA292,403A
patent/CA1075024A/en
not_active
Expired

1977-12-06
PL
PL1977202678A
patent/PL111010B1/en
unknown

1977-12-06
JP
JP14574177A
patent/JPS5383902A/en
active
Pending

1977-12-06
YU
YU02876/77A
patent/YU287677A/en
unknown

1979

1979-05-24
US
US06/042,136
patent/US4232911A/en
not_active
Expired – Lifetime

Also Published As

Publication number
Publication date

PL202678A1
(en)

1978-07-03

ATA861477A
(en)

1979-04-15

JPS5383902A
(en)

1978-07-24

PL111010B1
(en)

1980-08-30

FR2373434A1
(en)

1978-07-07

FR2373434B1
(en)

1979-03-30

ZA777089B
(en)

1978-09-27

YU287677A
(en)

1982-06-30

DE2753060A1
(en)

1978-06-08

CA1075024A
(en)

1980-04-08

DE2753060C2
(en)

1986-09-04

BE861468A
(en)

1978-06-02

US4232911A
(en)

1980-11-11

AT353212B
(en)

1979-11-12

Contact information