EP0626336B1 - Procedure and assembly for adjusting the direction of a rail wheel - Google Patents
Procedure and assembly for adjusting the direction of a rail wheel Download PDFInfo
- Publication number
- EP0626336B1 EP0626336B1 EP19940108144 EP94108144A EP0626336B1 EP 0626336 B1 EP0626336 B1 EP 0626336B1 EP 19940108144 EP19940108144 EP 19940108144 EP 94108144 A EP94108144 A EP 94108144A EP 0626336 B1 EP0626336 B1 EP 0626336B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- bearing
- eccentricity
- rail wheel
- vertical
- eccentric
- 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 - Lifetime
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C9/00—Travelling gear incorporated in or fitted to trolleys or cranes
- B66C9/08—Runners; Runner bearings
Definitions
- a procedure for adjusting the inclination relative to the vertical direction and the direction of travel of a rail wheel of a crane is a procedure for adjusting the inclination relative to the vertical direction and the direction of travel of a rail wheel of a crane.
- each end of the shaft of the rail wheel is provided with an eccentric bearing bush held by its outer surface in the frame of the end carriage.
- eccentric bearing bush By turning the eccentric bearing bush, it is possible to change the direction of travel of the rail wheel and its inclination relative to the vertical direction. In the starting situation, both bearing bushes lie with their eccentricity in the same direction, generally straight upwards.
- a new procedure for adjusting the direction of a rail wheel of a crane is presented as an invention.
- the procedure of the invention for adjusting the direction of a rail wheel of a crane is characterized by what is presented in the characterization part of claim 1.
- Other embodiments of the invention are characterized by the features presented in the other claims.
- the eccentric bearing bush on one side of the wheel is used to adjust the direction of travel while the one on the other side is used to adjust the vertical direction of the wheel.
- Fig. 1 presents three different views of a rail wheel 1.
- the figure shows the eccentric bearing bushes 2a and 2b on either side of the rail wheel 1, which in the structure of the invention consist of journal boxes 3a and 3b and shields 4a and 4b having an eccentricity with respect to each other
- Figures 3 and 4 present a diagrammatic illustration of the eccentric surfaces 9 forming part of the bearing bushes 2a and 2b.
- the shields match the inside diameter of the journal boxes 3a and 3b and are attached to each other by means of bolts 5.
- the eccentricity has to be so chosen that the necessary adjustments can be achieved with an angle of rotation below 20°.
- Bearing surfaces 8a and 8b are provided at supporting plates 7a and 7b to bear the eccentric surfaces 9 of the bearing bushes 2a and 2b.
- the bearing surfaces 8a and 8b are mounted to have the same eccentricity as the corresponding eccentric bearing bushes 2a and 2b.
- the bearing surface 8a for the bearing bush 2a on one side of the wheel is made equally eccentric to the centre of shaft 6 as the bearing bush 2a.
- the direction of eccentricity of the bearing surface 8a of the supporting plate 7a is selected e.g. on the basis of the desired directional effect. If the eccentricity of the bearing surface 8a is in the direction of the vertical axis and the bearing bush 2a is eccentrically installed so that it compensates the eccentricity of the bearing surface 8a (the journal box 3a lies on the centre line of the shaft), then the horizontal motion of the centre of the journal box 3a will be considerably larger than the vertical motion.
- FIG. 1 also shows the shaft 6 by means of which the rail wheel 1 is mounted in the bearing bushes 2a and 2b, as well as the above-mentioned supporting plates 7a and 7b whose bearing surfaces 8a and 8b guide the bearing bushes 2a and 2b and which are mounted on the frame of the end carriage so that they have the same eccentricity in the same direction as the corresponding outer diameters of the bearing bushes 2a and 2b.
- Supporting plate 7a has a horizontal eccentricity and supporting plate 7b on the opposite side a vertical eccentricity relative to the centre of shaft 6.
- the end carriage steel structure is manufactured to as high a precision as possible so as to minimize the need for adjusting the direction of the rail wheels 1. Because of the precision requirement regarding the direction adjustment, there is generally always a need for adjusting the direction of the rail wheel.
- the adjustment is performed as follows: The inclination relative to the vertical direction is adjusted by rotating bearing bush 2a, and the direction of travel is adjusted by turning bearing bush 2b. In the solution of the invention, bearing bush 2a is rotated if the centre of journal box 3a is to be moved in the vertical direction.
- bearing bush 2b When the direction of travel of the rail wheel 1 is to be corrected, bearing bush 2b is rotated either clockwise or anticlockwise, depending on the direction of the desired correction. This produces a horizontal displacement of the centre of journal box 3b.
- the bearing bushes 2a and 2b and supporting plates 7a and 7b are provided with markings indicating the position of the eccentric. When the adjustment is started, these markings must be aligned with each other. Thus, the markings allow the installer to see how much the bearing bushes 2a and 2b have been rotated during the adjustment.
- FIGs in Fig. 2 illustrate the effect of the direction adjustment, diagram A showing a view from the side of supporting plate 7a and the corresponding bearing bush 2a and diagram B from the side of supporting plate 7b and bearing bush 2b.
- diagram A showing a view from the side of supporting plate 7a and the corresponding bearing bush 2a and diagram B from the side of supporting plate 7b and bearing bush 2b.
- the design of the eccentric bearing bush may be varied by placing the eccentric surface 9 either on the inside or outside of the bush, and the bush may be manufactured as a single part or as consisting of several parts.
- the bearing surface 8a,8b guiding the bearing bush 2a,2b can be produced by casting or machining it in the framework or a separate part attached to it, and so on.
- the solution of the invention can also be applied for the adjustment of fulcrum pins and the shafts of rope pulleys.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Support Of The Bearing (AREA)
Description
A procedure for adjusting the inclination relative to the
vertical direction and the direction of travel of a rail
wheel of a crane.
After the assembly welding work on a crane has been completed,
it is often necessary to correct the alignment of a
rail wheel. This need generally arises from deformations and
inaccuracies in the steel structures of the crane. As is
known e.g. from DE-U-77 12 358, each end of the shaft of the rail wheel is provided
with an eccentric bearing bush held by its outer surface in
the frame of the end carriage. By turning the eccentric
bearing bush, it is possible to change the direction of
travel of the rail wheel and its inclination relative to the
vertical direction. In the starting situation, both bearing
bushes lie with their eccentricity in the same direction,
generally straight upwards. Therefore, when the bearing bush
is rotated, the horizontal motion of the centre of the rail
wheel journal box (adjustment of the direction of travel) is
given by sin α x E, where α = angle of rotation and E = eccentricity.
The vertical motion of the centre of the journal
box is (1 - cos α) x E . When the angle of rotation is 20° or
less (the situation in practice), the horizontal motion of
the centre of the journal box is considerably larger than
the vertical motion, so the adjustment of the direction of
travel is relatively easy to carry out. After this, it is
often necessary to change the inclination as well by turning
the other eccentric bearing bush. This has a greater effect
on the direction of travel than on the inclination. Whereupon
you have to correct the direction of travel by turning
the first bearing bush, as explained above. These adjustments
have to be repeated several times. A further drawback
is that finding the position of the bearing bushes requires
considerable precision, experience and care.
From DE-B-1 213 971 an assembly for adjusting the direction of
a rail wheel of a crane is known where the bearing bush on both
sides of the rail wheel is displaced by means of adjustment
screws. This requires a complicated construction.
To provide a solution to the problems referred to above, a
new procedure for adjusting the direction of a rail wheel of
a crane is presented as an invention. The procedure of the
invention for adjusting the direction of a rail wheel of a
crane is characterized by what is presented in the characterization
part of claim 1. Other embodiments of the invention
are characterized by the features presented in the
other claims. In the solution of the invention, the eccentric
bearing bush on one side of the wheel is used to adjust
the direction of travel while the one on the other side is
used to adjust the vertical direction of the wheel.
The advantages achieved by the invention include the
following:
- The installer need not have a long experience to be able to carry out the adjustment.
- The adjustment is simple to carry out.
- No extensive adjustment instructions are needed.
- The costs of adjusting the wheel direction are reduced.
- Considerably less time is consumed.
- Enables easy readjustment.
- The angle of rotation can be seen directly in a table.
In the following, the invention is described in detail by
the aid of some of its embodiments by referring to the
attached drawings, in which
- Fig. 1
- presents a
rail wheel 1 as mounted in the frame of an end carriage, seen infront view 1a, lateral view 1b and top view 1c. - Fig. 2
- illustrates the effect of direction adjustment
in diagrammatic form as seen from each side of
the
rail wheel 1. - Fig. 3
- presents a diagram of the eccentric surfaces on one side of the wheel.
- Fig. 4
- presents the bearing bush of Fig. 3 assembled and partially sectioned.
Fig. 1 presents three different views of a rail wheel 1. The
figure shows the eccentric bearing bushes 2a and 2b on
either side of the rail wheel 1, which in the structure of
the invention consist of journal boxes 3a and 3b and shields
4a and 4b having an eccentricity with respect to each other
Figures 3 and 4 present a diagrammatic illustration of the
eccentric surfaces 9 forming part of the bearing bushes
2a and 2b. The shields match the inside diameter of
the journal boxes 3a and 3b and are attached to each other
by means of bolts 5. The eccentricity has to be so chosen
that the necessary adjustments can be achieved with an angle
of rotation below 20°. Bearing surfaces 8a and 8b are
provided at supporting plates 7a and 7b
to bear the eccentric surfaces 9 of the bearing bushes 2a and 2b.
The bearing surfaces 8a and 8b are mounted to have the same eccentricity
as the corresponding eccentric bearing bushes 2a and 2b. For example,
in the solution
of the invention, the bearing surface 8a for the
bearing bush 2a on one side of the wheel is made equally
eccentric to the centre of shaft 6 as the bearing bush 2a. The direction of eccentricity
of the bearing surface 8a of the supporting plate 7a is
selected e.g. on the basis of the desired directional
effect. If the eccentricity of the bearing surface 8a is in
the direction of the vertical axis and the bearing bush 2a
is eccentrically installed so that it compensates the
eccentricity of the bearing surface 8a (the journal box 3a
lies on the centre line of the shaft), then the horizontal
motion of the centre of the journal box 3a will be considerably
larger than the vertical motion. On the other
hand, if the bearing surface 8a has a horizontal eccentricity
relative to the centre, then rotating the eccentric bearing
bush 2a will cause a change in the vertical position of
the journal box 3a but hardly any change in its horizontal
position. Fig. 1 also shows the shaft 6 by means of which
the rail wheel 1 is mounted in the bearing bushes 2a and 2b,
as well as the above-mentioned supporting plates 7a and 7b
whose bearing surfaces 8a and 8b guide the bearing bushes 2a
and 2b and which are mounted on the frame of the end carriage
so that they have the same eccentricity in the same direction
as the corresponding outer diameters of the bearing
bushes 2a and 2b. Supporting plate 7a has a horizontal
eccentricity and supporting plate 7b on the opposite side a
vertical eccentricity relative to the centre of shaft 6. The end carriage steel structure is
manufactured to as high a precision as possible so as to
minimize the need for adjusting the direction of the rail
wheels 1. Because of the precision requirement regarding the
direction adjustment, there is generally always a need for
adjusting the direction of the rail wheel. The adjustment is
performed as follows: The inclination relative to the vertical
direction is adjusted by rotating bearing bush 2a, and
the direction of travel is adjusted by turning bearing bush
2b. In the solution of the invention, bearing bush 2a is
rotated if the centre of journal box 3a is to be moved in
the vertical direction. When the direction of travel of the
rail wheel 1 is to be corrected, bearing bush 2b is rotated
either clockwise or anticlockwise, depending on the direction
of the desired correction. This produces a horizontal
displacement of the centre of journal box 3b. As an aid for
the installer, the bearing bushes 2a and 2b and supporting
plates 7a and 7b are provided with markings indicating the
position of the eccentric. When the adjustment is started,
these markings must be aligned with each other. Thus, the
markings allow the installer to see how much the bearing
bushes 2a and 2b have been rotated during the adjustment.
The diagrams in Fig. 2 illustrate the effect of the direction
adjustment, diagram A showing a view from the side of
supporting plate 7a and the corresponding bearing bush 2a
and diagram B from the side of supporting plate 7b and bearing
bush 2b. In the solution of the invention, when bearing
bush 2a is rotated by an amount less than 20° according to
diagram A, the vertical displacement of the centre of journal
box 3a is considerably larger than its horizontal displacement.
If the eccentricity = E, then the (vertical) displacement
of the centre of journal box 3a corresponding to a
rotational angle of 20° in the desired direction of correction
will be = sin 20° x E = 0.34 x E , whereas the displacement
in the unwanted direction, in this case the horizontal
direction, will be (1-cos α) x E = 0.06 x E . Thus, the effect
of the adjustment in the wanted direction of correction
is 5.6 times as large as the effect in the unwanted direction.
If the angle of rotation α is smaller than in the
example, then the effect in the unwanted direction will be
considerably smaller. In this way, adjustment of the inclination
of the rail wheel 1 is achieved. Diagram B in Fig. 2
illustrates the effect of the direction adjustment when
bearing bush 2b is turned, causing the centre of journal box
3b to be displaced in the desired horizontal direction in
the manner described above. In this way, adjustment of the
direction of travel of the rail wheel 1 is achieved.
It is obvious to a person skilled in the art that different
embodiments of the invention are not restricted to the examples
described above, but that they may instead be varied
within the scope of the claims presented below. The design
of the eccentric bearing bush may be varied by placing the
eccentric surface 9 either on the inside or outside of the
bush, and the bush may be manufactured as a single part or
as consisting of several parts. On the framework side of the
structure, the bearing surface 8a,8b guiding the bearing bush 2a,2b can
be produced by casting or machining it in the framework or a
separate part attached to it, and so on. The solution of the
invention can also be applied for the adjustment of fulcrum
pins and the shafts of rope pulleys.
Claims (5)
- A method for adjusting the vertical direction and the direction of travel of a rail wheel (1) in a crane, bearing surfaces (8a, 8b) that guide eccentric bearing bushes (2a, 2b) of a bearing of the rail wheel (1) being so placed that they have the same eccentricity relative to the centre line of a shaft (6)
characterized in
thatthe direction of travel of the rail wheel is adjusted by rotating the first bearing bush (2b) which is arranged at the first bearing surface (8b) so that the eccentricity between them is vertical the eccentricity between bearing surface (86) and shaft (6) being also vertical, andthe vertical inclination of the rail wheel is adjusted by rotating the second bearing bush (2a) which is arranged at the second bearing surface (8a) so that the eccentricity between them is horizontal, the eccentricity between bearings surface (8a) and shaft (6) being also horizontal,whereas the eccentricities have to be so chosen that the desired direction adjustment can be accomplished with a sufficiently small angle of rotation. - A method according to claim 1,
characterized in
that to help the installer, the bearing bushes (2a, 2b) and supporting plates (7a, 7b) are provided with markings indicating the position of the eccentric. - A method according to any one of the preceding claims,
characterized in
that the eccentric bearing bush (2a, 2b) is adjusted by rotating by an angle ot rotation indicated in a table. - An arrangement for adjusting the vertical direction and the direction of travel of a rail wheel (1) in a crane, bearing surfaces (8a, 8b) that guide eccentric bearing bushes (2a, 2b) of a bearing of the rail wheel (1) being so placed that they have the same eccentricity relative to the centre line of a shaft (6),
characterized in
thatthe eccentricity of the first bearing surface (8b) is vertical and the eccentricity of the second bearing surface (8a) is horizontal,the first bearing bush (2b) is located at the first bearing surface (8b) so that the eccentricity between them is vertical, andthe second bearing bush (2a) is located at the second bearing surface (8a) so that the eccentricity between them is horizontal. - An arrangement according to claim 4,
characterized in
that to help the installer, the bearing bushes (2a, 2b) and supporting plates (7a, 7b) have markings indicating the position of the eccentric.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FI932438 | 1993-05-28 | ||
| FI932438A FI96303C (en) | 1993-05-28 | 1993-05-28 | Procedure for aligning carrier wheels |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0626336A1 EP0626336A1 (en) | 1994-11-30 |
| EP0626336B1 true EP0626336B1 (en) | 1999-01-20 |
Family
ID=8538023
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19940108144 Expired - Lifetime EP0626336B1 (en) | 1993-05-28 | 1994-05-26 | Procedure and assembly for adjusting the direction of a rail wheel |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0626336B1 (en) |
| DE (1) | DE69416036T2 (en) |
| FI (1) | FI96303C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102514902A (en) * | 2012-01-13 | 2012-06-27 | 冠亚机械工业（昆山）有限公司 | Four-wheel trolley |
| US8899463B2 (en) | 2010-09-30 | 2014-12-02 | Ethicon Endo-Surgery, Inc. | Surgical staple cartridges supporting non-linearly arranged staples and surgical stapling instruments with common staple-forming pockets |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5791257A (en) * | 1997-01-08 | 1998-08-11 | Harnischfeger Corporation | Overhead crane with adjustable bearings |
| US6622877B2 (en) | 2001-06-04 | 2003-09-23 | Mhe Technologies, Inc. | Overhead crane with adjustable bearing assemblies |
| DE102007054693A1 (en) * | 2007-11-14 | 2009-06-10 | Stahl Crane Systems Gmbh | Guide roller assembly for cranes |
| FI124036B (en) | 2010-08-30 | 2014-02-14 | Cargotec Finland Oy | Lifting trolley attachment and adjustment solution |
| CN103964304A (en) * | 2014-04-17 | 2014-08-06 | 洛阳汉鼎起重机械有限公司 | Wheel set structure with eccentric sleeve |
| CN105174048B (en) * | 2015-08-20 | 2017-10-27 | 孟文 | A kind of adjustable end-beam arrangement that can easily be accommodated |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR662077A (en) * | 1928-10-12 | 1929-08-02 | D Usinage Et De Petite Mecaniq | Advanced transmission bearing |
| DE1213971B (en) * | 1960-11-24 | 1966-04-07 | Demag Ag | Crane wheel bearing with the wheel bearing bolts in the two web plates of the crane wheel carrier |
| US3399582A (en) * | 1967-12-26 | 1968-09-03 | Henry Robert Randall | Shaft adjustment apparatus and power transmission means |
| DE7712358U1 (en) * | 1977-04-20 | 1977-08-18 | Aumund-Foerdererbau Gmbh, 4134 Rheinberg | Adjustable impeller bearings |
| DE4019561C2 (en) * | 1990-06-15 | 1998-01-29 | Mannesmann Ag | Adjustable bearing of an impeller |
-
1993
- 1993-05-28 FI FI932438A patent/FI96303C/en not_active IP Right Cessation
-
1994
- 1994-05-26 EP EP19940108144 patent/EP0626336B1/en not_active Expired - Lifetime
- 1994-05-26 DE DE1994616036 patent/DE69416036T2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8899463B2 (en) | 2010-09-30 | 2014-12-02 | Ethicon Endo-Surgery, Inc. | Surgical staple cartridges supporting non-linearly arranged staples and surgical stapling instruments with common staple-forming pockets |
| CN102514902A (en) * | 2012-01-13 | 2012-06-27 | 冠亚机械工业（昆山）有限公司 | Four-wheel trolley |
Also Published As
| Publication number | Publication date |
|---|---|
| DE69416036T2 (en) | 1999-07-15 |
| EP0626336A1 (en) | 1994-11-30 |
| FI932438A (en) | 1994-11-29 |
| FI96303C (en) | 1996-06-10 |
| FI96303B (en) | 1996-02-29 |
| DE69416036D1 (en) | 1999-03-04 |
| FI932438A0 (en) | 1993-05-28 |
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