The present invention relates to an elevator suspension arrangement and to an elevator hoisting
machine.
The present invention concerns in the first place an elevator without machine room and
provided with a substantially flat discoid hoisting machine, in which elevator the hoisting ma-
chine is mounted e.g. on one or more guide rails in the elevator shaft. The invention relates in
particular to so-called Double Wrap suspension, which is used e.g. in traction sheave machines
provided with a coating to improve the frictional engagement between the traction sheave and
the hoisting ropes.
Previously known is e.g. an elevator solution without machine room as disclosed in specifica-
tion WO 03/066498, wherein a gearless hoisting machine having an axial length larger than the
diameter of the machine is mounted on guide rails in an elevator shaft. One end of the machine
is supported on a counterweight guide rail while the other end is supported on a car guide rail,
the guide rail lines of the guide rails being perpendicular to each other. In addition, a diverting
pulley is provided below the machine for so-called Double Wrap roping. The diverting pulley
is placed in a typical manner in the rope suspension and the diverting pulley is aligned at in-
stallation time very accurately with the traction sheave to ensure a correct passage of the ropes.
A drawback with the disclosed solution is the space required in the elevator shaft due to the
placement of the machine. The size of the machine itself and the size of the mounting of the
machine take up space in the cross-sectional area of the elevator and thus reduce e.g. the cross-
sectional area of the elevator that can be accommodated in the shaft. An additional drawback is
that the auxiliary diverting pulley required in the Double Wrap solution has to be aligned at an
exactly correct angle relative to the position of the traction sheave. This aligning has to be done
accurately, so it is difficult and takes time in cramped shaft conditions. Moreover, special tools
may be needed. As a consequence of the above circumstances, the aligning is on the whole a
relatively expensive operation.
The object of the present invention is to overcome the above-mentioned drawbacks and to

achieve a space-saving elevator suspension arrangement of economical cost that will make it
possible to install an auxiliary diverting pulley for Double Wrap suspension below the traction
sheave in an exactly correct position without time-consuming and difficult adjustments. A fur-
ther object of the suspension arrangement of the invention is to enable the aforesaid auxiliary
diverting pulley to be secured in conjunction with the hoisting machine without separate and
voluminous mounting solutions.
Accordingly, the present invention provides a suspension arrangement for an elevator, which
elevator preferably is an elevator without machine room and in which elevator the hoisting ma-
chine is connected via a traction sheave to hoisting ropes, by means of which the elevator car is
moved, and which hoisting machine comprises at least a stator frame secured to a mounting
place in the elevator shaft and a traction sheave and a rotor frame forming a fixed assembly,
which assembly is mounted with bearings so as to be rotatable with respect to the stator frame,
and which hoisting machine is secured to a stiffener bracing the stator frame, characterized in
that the stiffener comprises a support for mounting a bearing, said support being preferably
located below the traction sheave and extending in a direction towards the hoisting machine, on
which support is mounted with a bearing a freely rotating auxiliary diverting pulley and that
both a support for mounting the bearing of the traction sheave that forms the axle of the traction
sheave and the support for mounting a bearing that forms the axle of the auxiliary diverting pul-
ley are permanently integrated with the stiffener.
The invention also provides an elevator hoisting machine, which hoisting machine comprises at
least a stator frame and a fixed assembly of a traction sheave and a rotor frame, which assembly
is mounted on bearings so as to be rotatable with respect to the stator frame, and which hoisting
machine is secured to a stiffener bracing the stator frame, wherein the stiffener comprises a
support for a bearing, said support being preferably situated below the traction sheave and ex-
tending in a direction towards the hoisting machine, on which support is mounted with a bear-
ing a freely rotatable auxiliary diverting pulley.
Other embodiments of the invention are disclosed hereinafter. Inventive embodiments are also
presented in the description part of the present application. The inventive content disclosed in
the application can also be defined in other ways man is done hereinafter. The inventive content

may also consist of several separate inventions, especially if the invention is considered in the
light of explicit or implicit sub-tasks or in respect of advantages or sets of advantages achieved.
In this case, some of the attributes contained hereinafter may be superfluous from the point of
view of separate inventive concepts.
The elevator hoisting machine suspension arrangement and the hoisting machine of the inven-
tion provide the advantage of a sturdy mounting solution in which the auxiliary diverting pulley
to be installed in conjunction with it can be automati-

cally mounted at an exactly correct setting angle relative to
the position of the traction sheave without any adjustments of
setting angles. A further advantage is that no separate mount-
ing structures are needed for mounting the auxiliary diverting
pulley, because such separate mounting structures always re-
quire a strong steel structure to which the diverting pulley
is secured. In addition, mounting the auxiliary diverting pul-
ley in conjunction with the hoisting machine reduces the over-
all space requirement of the hoisting machine and the auxil-
iary diverting pulley. This allows a saving of transverse
space in the elevator shaft, so that it is possible e.g. to
place an elevator car of a larger cross-section in the same
space.
The elevator hoisting machine of the invention comprises at
least a stator frame and a rotor frame that forms a fixed as-
sembly with the traction sheave, which assembly is mounted on
bearings so as to be rotatable with respect to the stator
frame. The hoisting machine is secured to a stiffener bracing
the stator frame. The stiffener comprises a support for a
bearing, said support being preferably situated below the
traction sheave and extending in a direction towards the
hoisting machine, on which support is mounted with a bearing a
freely rotatable auxiliary diverting pulley.
In the following, the invention will be described in detail
with reference to an embodiment example and the attached draw-
ings, wherein
Fig. 1 is a general representation of an traction sheave
elevator without counterweight according to the
invention, seen in an oblique top view,
Fig 2 presents a hoisting machine according to the in-
vention in front view.
Fig. 3 presents a more detailed side view of a placement
according to the invention of an auxiliary divert-
ing pulley in conjunction with the hoisting ma-

chine, seen in a sectioned view, and
Fig. 4 presents a sectioned side view of a stator frame
stiffener according to the invention.
Fig. 1 presents a general view of a traction sheave elevator
without counterweight according to the invention, wherein the
elevator is preferably an elevator without machine room and
with a drive machine 4 placed in the elevator shaft. The ele-
vator presented in the figure is a traction sheave elevator
without counterweight and with machine above, in which the
elevator car 1 moves along guide rails 2. The elevator pre-
sented in Fig. 1 is a side rucksack-type elevator in which the
elevator guide rails 2, hoisting machine 4, diverting pulleys,
rope compensating device 15 and hoisting ropes 3 are arranged
on one side of the elevator car 1, which in this case is lo-
cated to the right of the elevator car 1 as seen from the door
opening towards the elevator shaft. This arrangement can also
be implemented on any side of the elevator car 1, such as e.g.
in the case of a rucksack solution in the space between the
back wall of the elevator car and the elevator shaft. The ele-
vator can also be implemented by placing the guide rails of
the elevator car and some of the diverting pulleys on differ-
ent sides of the elevator car.
In Fig. 1, the hoisting ropes run as follows: One end of the
hoisting ropes is secured to the sheave of smaller diameter in
a compensating device 15 placed on the elevator car, which
sheave is immovably fitted fast to a sheave of larger diame-
ter. From the compensating device 15, the hoisting ropes 3 go
upwards and meet a diverting pulley 14 placed above the eleva-
tor car in the elevator shaft, preferably in the upper part of
the elevator shaft, passing around it along rope grooves pro-
vided on the diverting pulley 14. These rope grooves may be
coated or uncoated. The coating used is e.g. a friction-
increasing material, such as polyurethane or some other appro-
priate material. From diverting pulley 14, the ropes go fur-
ther downwards to a diverting pulley 13 fitted in place on the

elevator car, and having passed around this pulley the ropes
go further upwards to a diverting pulley 12 fitted in place in
the upper part of the elevator shaft. Having passed around
diverting pulley 12, the ropes come again downwards to a di-
verting pulley 11 fitted in place on the elevator car, pass
around it and go further upwards to a diverting pulley 10 fit-
ted in place in the upper part of the elevator shaft, and hav-
ing passed around this pulley the hoisting ropes 3 go further
downwards to a diverting pulley 9 fitted in place on the ele-
vator car. Having passed around this pulley 9, the ropes 3 go
further upwards in tangential contact with an auxiliary di-
verting pulley 7 to the traction sheave 5.
The auxiliary diverting pulley 7 is preferably fitted in con-
junction with the hoisting machine 4, near and below the trac-
tion sheave 5. Between the auxiliary diverting pulley 7 and
the traction sheave 5, the figure shows Double Wrap (DW) rop-
ing, in which roping the hoisting ropes 3 run in tangential
contact with the auxiliary diverting pulley 7 upwards to the
traction sheave 5 and, having passed around the traction
sheave 5, the hoisting ropes return to the auxiliary diverting
pulley 7, pass around it and go back to the traction sheave 5.
In Double Wrap roping, when the auxiliary diverting pulley 7
is substantially the same size with the traction sheave 5, the
auxiliary diverting pulley 7 can also function as a damping
pulley. In this case, the ropes going from the traction sheave
5 to the elevator car 1 pass via the rope grooves of the aux-
iliary diverting pulley 7 and the deflection of the rope
caused by the auxiliary diverting pulley is very small. It
could be stated that the ropes going from the traction sheave
and the ropes coming to it only run in "tangential contact"
with the auxiliary diverting pulley. Such "tangential contact"
functions as a solution damping vibrations of the outgoing
ropes and it can also be applied in other roping solutions.
Diverting pulleys 14,13,12,11,10,9,7 together with the trac-

tion sheave 5 of the hoisting machine and the compensating
device 15 form the suspension above the elevator car, which
has the same suspension ratio as the suspension below the ele-
vator car, which in Fig. 1 is 7:1.
From the traction sheave 5, the ropes go further in tangential
contact with the auxiliary diverting pulley 7 to a diverting
pulley 8, which is preferably fitted in place in the lower
part of the elevator shaft. Having passed around diverting
pulley 8, the ropes 3 go further upwards to a diverting pulley
16 fitted in place on the elevator car, and having passed
around this pulley the ropes go further downwards to a divert-
ing pulley 17 in the lower part of the elevator shaft, pass
around it and return to a diverting pulley 18 fitted in place
on the elevator car. Having passed around diverting pulley 18,
the hoisting ropes 3 go further downwards to a diverting pul-
ley 19 in the lower part of the elevator shaft and, having
passed around this pulley, the ropes go further upwards to a
diverting pulley 20 on the elevator car. Having passed around
diverting pulley 20, the hoisting ropes 3 go further downwards
to a diverting pulley 21 fitted in place in- the lower part of
the elevator shaft, pass around it and go further upwards to
the compensating device 15 fitted in place on the elevator
car, the second end of the hoisting ropes being secured to the
sheave of larger diameter in the compensating device. Divert-
ing pulleys 8,16,17,18,19,20,21 and the compensating device 15
form the hoisting rope suspension below the elevator car.
The hoisting machine 4 and traction sheave 5 of the elevator
and/or auxiliary diverting pulley 7 and diverting pulleys
10,12,14 in the upper part of the elevator shaft may be
mounted in place on a frame structure formed by the guide
rails 2 or on a beam structure at the upper end of the eleva-
tor, shaft or separately in the elevator shaft or on some other
appropriate mounting arrangement. The diverting pulleys in the
"lower part of the elevator shaft may be mounted in place on a
frame structure formed by the guide rails 2 or to a beam

structure placed at the lower end of the elevator shaft or
separately in the lower part of the elevator shaft or on some
other appropriate mounting arrangement. The diverting pulleys
on the elevator car may be mounted in place on the frame
structure of the elevator car 1 or to a beam structure or beam
structures in the elevator car or separately on the elevator
car or some other appropriate mounting arrangement. The com-
pensating device 15 as illustrated in Fig. 1, used as a rope
elongation compensating assembly and functioning as a tension-
ing sheave assembly, can also be advantageously placed to re-
place diverting pulley 21 on the bottom of the shaft, which
pulley is preferably secured in place to the floor of the
shaft, or diverting pulley 14 in the upper part of the shaft,
which pulley is preferably secured in place to the ceiling of
the shaft if an even suspension ratio is used, in which case
the compensating device is not mounted in conjunction with the
elevator car. In this case, the number of diverting pulleys
needed is smaller by one. In advantageous cases, this also
allows easier and faster installation of the elevator.
In the embodiment example according to the invention, an ele-
vator hoisting machine e.g. as presented in Fig. 2 is used.
The hoisting machine comprises at least a stator frame 26 se-
cured to a guide rail 2 in the elevator shaft and an assembly
consisting of a traction sheave 5 and a rotor frame 25, said
rotor frame having preferably a substantially discoid shape
and said rotor frame being mounted on bearings so as to be
rotatable with respect to the stator frame 26. Secured to the
stator frame 26 is a stiffener 22 bracing the stator frame,
which stiff ener, when mounted in the elevator shaft, is sub-
stantially vertical and extends along the center line of the
stator frame substantially over the entire stator frame. The
stiff ener 22 may form an integral part of the stator frame 26,
i.e. it may be part of the same casting, or the stiffener may
be a separate body secured to the stator frame. In Fig. 2, the
stiffener 22 is a separate body with a number of supporting
brackets 29 extending from its central part in different di-

rections, the outer end of each bracket being connected to the stator frame 26 by means of a
fastening part 30. In addition, the stiffener 22 or the stator frame 26 comprises at least one
brake 24 serving as the brake of the elevator. The brake 24 may simultaneously function as a
mass body that has been arranged to make the mass distribution and bending stiffness of the
stator frame substantially unsymmetrical to suppress undesirable vibrations.
The lower part of the stiffener 22 stiffening and bracing the hoisting machine is close to the
traction sheave 5, at a suitable distance below the traction sheave a support 23 for a bearing,
said support being preferably a cylindrical projection extending from the stiffener 22 towards
the hoisting machine. The support 23 constitutes an axle for the auxiliary diverting pulley 7,
which is mounted with a bearing on the support 23 below the traction sheave 5 so as to be
freely rotatable. The auxiliary diverting pulley 7 makes it possible to use so-called Double
Wrap suspension, which can be utilized to increase the contact angle on the traction sheave 5
and thereby the gripping force achieved via friction. In such Double Wrap suspension, the
ropes 3 coming to the traction sheave run tangentially past the auxiliary diverting pulley 7 as
explained above.
Fig.3 presents a vertically sectioned hoisting machine 4 and Fig. 4 presents a vertically sec-
tioned stiffener 22 partially integrated with the stator frame. In Fig. 3, the vertical section of the
hoisting machine is not taken along a plane passing directly via the center line. Fig. 3 also
shows the stator frame 26 secured to the stiffener 22. The traction sheave 5 is shown in a sec-
tioned form and rotatably mounted on the bearing surface 27 of the support for the traction
sheave bearing 31 on the stiffener 22, said support being preferably a cylindrical projection.
The support for the traction sheave bearing 31 is integrated with the stiffener 22 and extends
from the stiffener towards the hoisting machine, forming the axle of the traction sheave 5. The
auxiliary diverting pulley 7 below the traction sheave 5 is mounted with a bearing on a bearing
surface 28 machined on the cylindrical support 23 permanently integrated with the stiffener 22,
which bearing surface has been ready machined at the desired angle to the corresponding bear-
ing surface 27 for the traction sheave 5, which bearing surface has likewise been integrated
with and machined in the stiffener 22. In other words, both bearing surfaces have been ready
machined at a desired angle to each other already during manufacture of the stiffener 22. There-
fore, both the traction sheave 5 and the auxiliary diverting pulley 7 can be automatically moun-

ted at the correct angle relative to each other during installation.
It is obvious to the person skilled in the art that the invention is not limited to the example de-
scribed above. Thus, the invention is not necessarily limited even to Double Wrap type elevat-
ors, but the elevator suspension arrangement can be implemented in the same way even in
Single Wrap type elevators in which the auxiliary diverting pulley is disposed in the same way
as described above but the hoisting ropes are passed only once around the traction sheave, so
the contact angle of the rope on the traction sheave is about 180°. The auxiliary diverting pulley
below the traction sheave is only used for "tangential contact" of the rope in the manner de-
scribed above, in which case the auxiliary diverting pulley functions as a rope guide and a
damping sheave suppressing vibrations. The hoisting ropes may also be passed crosswise by
means of the auxiliary diverting pulley, in which case a contact angle larger than 180° on the
traction sheave is obtained.
It is further obvious to the person skilled in the art that the place and method of suspension may
differ from the above description. Instead of being mounted on a guide rail, the hoisting ma-
chine may be mounted on a supporting beam connecting the guide rails, or the hoisting ma-
chine may be mounted on

any part suited for use as a mounting point in the shaft, e.g.
on a wall of the elevator shaft. Similarly, the structure and
integration of the stiffener with the stator frame may differ
from the above description. It is additionally obvious that
the solution of the invention can as well be applied in eleva-
fjtox solutions provided with a counterweight.

We Claim:
1. A suspension arrangement for an elevator, which elevator preferably is an elevator without
machine room and in which elevator the hoisting machine (4) is connected via a traction sheave
(5) to hoisting ropes (3), by means of which the elevator car (1) is moved, and which hoisting
machine (4) comprises at least a stator frame (26) secured to a mounting place in the elevator
shaft and a traction sheave (5) and a rotor frame (25) forming a fixed assembly, which
assembly is mounted with bearings so as to be rotatable with respect to the stator frame, and
which hoisting machine (4) is secured to a stiffener (22) bracing the stator frame (26),
characterized in that the stiffener (22) comprises a support for mounting a bearing (23), said
support being preferably located below the traction sheave (5) and extending in a direction
towards the hoisting machine, on which support is mounted with a bearing a freely rotating
auxiliary diverting pulley (7) and that both a support (31) for mounting the bearing of the
traction sheave that forms the axle of the traction sheave (5) and the support (23) for mounting
a bearing that forms the axle of the auxiliary diverting pulley (7) are permanently integrated
with the stiffener (22).
2. A suspension arrangement as claimed in claim 1, wherein both the bearing surface (27) of
the support for mounting the bearing of the traction sheave that forms the axle of the traction
sheave (5) and the support (23) for mounting a bearing that forms the axle of the auxiliary
diverting pulley (7) have been machined beforehand during manufacture of the stiffener (22).
3. A suspension arrangement as claimed in claim 1 or 2, wherein the bearing surface (27) for
the traction sheave and the bearing surface (28) for the auxiliary diverting pulley have been so
machined that they are at angle relative to each other such that the plane of rotation of the
traction sheave differs from the plane of rotation of the auxiliary diverting pulley in such
manner that the hoisting ropes between the traction sheave and the auxiliary diverting pulley
are passed between each other in a way as advantageous as possible in respect of operation.
4. A suspension arrangement as claimed in any one of the preceding claims, wherein the
hoisting machine is secured directly to a guide rail or via a separate mounting to one or more
guide rails or to some other suitable place in the elevator shaft.

5. A suspension arrangement as claimed in any one of the preceding claims, wherein the
stiffener (22) is a solid casting.
6. An elevator hoisting machine, which hoisting machine comprises at least a stator frame (26)
and a fixed assembly of a traction sheave (5) and a rotor frame (25), which assembly is
mounted on bearings so as to be rotatable with respect to the stator frame, and which hoisting
machine is secured to a stiffener (22) bracing the stator frame (26), characterized in that the
stiffener (22) comprises a support (23) for a bearing, said support being preferably situated
below the traction sheave (5) and extending in a direction towards the hoisting machine, on
which support is mounted with a bearing a freely rotatable auxiliary diverting pulley (7) and
that both a support (31) for mounting the bearing of the traction sheave that forms the axle of
the traction sheave (5) and the support (23) for mounting a bearing that forms the axle of the
auxiliary diverting pulley (7) are permanently integrated with the stiffener (22).

The invention relates to a suspension arrangement for an elevator, which elevator preferably is an
elevator without machine room and in which elevator the hoisting machine (4) is connected via a
traction sheave (5) to hoisting ropes (3), by means of which the elevator car (1) is moved, and which
hoisting machine (4) comprises at least a stator frame (26) secured to a mounting place in the elevator
shaft and a traction sheave (5) and a rotor frame (25) forming a fixed assembly, which assembly is
mounted with bearings so as to be rotatable with respect to the stator frame, and which hoisting machine
(4) is secured to a stiffener (22) bracing the stator frame (26). The stiffener (22) comprises a support for
mounting a bearing (23), said support being preferably situated below the traction sheave (5) and
extending in a direction towards the hoisting machine, on which support is mounted with a bearing a
freely rotating auxiliary diverting pulley (7).