FR2608578A1 - GEAR TRANSMISSION FOR A LIFT APPARATUS - Google Patents

Abstract

GEAR TRANSMISSION FOR ELEVATOR EQUIPMENT, INCLUDING A CYLINDRICAL GEAR TRAIN 2 WITH A SINGLE STAGE OR MULTI-STAGE, ROTATING SUPPORTED PARTLY OR TOTALLY INSIDE A CABLE DRUM 1. CYLINDRICAL TRAIN 2 AND ONE TRAIN PLANETARY 3 ARE INTEGRATED SO AS TO CONSTITUTE A GEAR TRANSMISSION INSIDE A CYLINDRICAL ENCLOSURE, THIS TRANSMISSION BEING PLACED INSIDE THE CABLE DRUM 1.

Description

The present invention relates to a trans-

  gear mission in an elevating device, said

  transmission comprising a cylindrical gear train

  single or multi-storey, partially or fully rotatably supported inside

  of a cable drum, and a planet gear train

res in its extension.

  A disadvantage of transmissions to meshing

  cylindrical ges of this type, known in the art, is that they are bulky, particularly in the

  torque transmission case. Transmissions to

  cylindrical shot blasting is heavy when the torque is high. Another solution is to use

  planetary gears but these trans-

  missions are storytelling in the case of weak couples,

  due to the large number of components. To the great vi-

  operating braids, vibration problems ap-

  appear in planetary gear transmissions

  res, as well as high additional dynamic forces. The uniform distribution of forces in the train

  planetary is another difficult problem, peculiar-

  aggravated at high speeds of rotation. A diffi-

  particular culture encountered in planetary transmissions lies in the non-uniform load distributions resulting from deviations in shape, centering and

pitch of the toothed crown.

  The object of the present invention is to avoid the above drawbacks and to provide a new

  type of gear reducer for a lifting device.

  The gear transmission according to the invention is

  characterized in that the cylindrical transmission and the

  planetary transmission are integrated so as to

  to set up a gear transmission inside a

  cylindrical shell which is placed inside the drum

  cable bour. The advantage of the invention is that one can use

  read the best features of both types

  different gears, in that we combine the trans-

  cylindrical mission, which is advantageous in the field of low torques and high rotational speeds, and planetary transmission which is advantageous in the field of high torques. Thanks to the radial arrangement of the cylindrical stages, the transmission can be constructed with a minimum length and the transmission ratio can be high. At the entrance end

  high-speed transmission makes it easy to li-

  mimic operating noise and vibrations,

  for example, planetary transmission.

  An advantageous embodiment of the invention

  tion is characterized in that the planetary transmission

  re at slow speed is coupled, by ac-

  tooth couplings, both to the cylindrical transmission

  that and to the cable drum. Consequently, an excellent equalization of the forces in the meshing is obtained between the central shaft and the planet gears on the one hand and between the ring gear and the satellites on the other hand, since the tooth couplings make possible a

  good equalization in parallel displacement in trans-

  planetary mission. The planet carrier is also moved

  parallel. Normally we only use one

  angular change in the equalization of a planetary train

  to hush up. However, in this case, the load on the tooth is greater at one end. In the device according to the invention, the tooth is subjected to a uniform load

  over its entire length and this significantly increases the

  load capacity as well as the useful life and the

  security. The overall performance of the transmission is good.

  Another embodiment of the invention is characterized in that the cylindrical train and the planetary train are housed in a cylindrical drum which rotatably carries the cable drum. In addition, when the hardness of the cylindrical drum is chosen so that the drum can be used as a bearing surface and as a ring gear of the planetary gear, a very robust and safe operation is obtained, without unnecessarily complicated designs and components. .

  In addition to the foregoing, the information

  vention also includes other provisions which

  will emerge from the description which follows.

  The invention will be better understood using the

  further description below, which refers to

  attached drawings in which: Figure 1 shows in partial section the gear transmission of a lifting device; Figure 2 is a block diagram of the spur gear transmission in end view; and

  Figure 3 illustrates the combination of a trans-

  cylindrical mission and a planetary transmission.

  It should be understood, however, that these drawings and the corresponding descriptive parts are

  given only as an illustration of the subject matter of the

  vention, of which they in no way constitute a limit

tation.

  The gear transmission of an electronic device

  vator includes a single stage cylindrical train 2 or

  multistage, supported in a cable drum 1.

  This cylindrical train is coupled to the cable drum by a planetary train 3 housed in the cable drum. The

  planetary gear 3 is coupled to both the cylinder gear

  drique 2 and to the cable drum 1 by tooth couplings 4 and 5 respectively. The cylindrical train 2 and

  planetary gear 3 are housed in a cylinder drum

  drique 6 on which the cable drum 1 is supported

  in a rotating manner by means of ai bearings

  guilles 7.8. Power is supplied to the transmission by a shaft 9. The bearings of the cylindrical stages are

  placed in an intermediate disc of the cylindrical drum

  as 6 and in an end flange. The cylindrical stages

  that are arranged radially inside the casing so that the last cylindrical stage 10 drives the shaft

  central 11 of the planetary transmission via

  diary of the tooth coupling 4. The latter is cons-

  truit so that the coupling sleeve, placed inside an intermediate ring gear, is

  driven by the grooved shaft of the cylindrical stage 10.

  The coupling sleeve transmits the torque from the same

  so as to the splined central shaft 11 of the planetary gear.

  The mesh between the shafts 10 and 11 and the coupling sleeve 4 has sufficient play, so that

  the coupling sleeve 4 can take a position o-

  when the central shaft assumes the operating position defined by the planet gears 12. We

  thus retains the best possible meshing. Of the-

  radial placement of the central shaft is effected by

  lation parallel to the planet gears. Grâ-

  this to the integrated arrangement of the transmission, the necessary

  radial displacement is minimal and the profile of

  tooth can therefore be a standard involute profile. The ar-

  central bre drives the planetary gear 12. From

  planet carrier 13, the torque is transmitted via

  diary of the tooth coupling 5 to the intermediate disc of the cable drum 1. The tooth coupling 5 works on the same principle as the tooth coupling 4. The only difference is that the internal teeth are provided on the holder. satellites 13 and on the intermediate disc 14 of the drum. The torque is transmitted by element 5 which

  can take an oblique position. This guaranteed design

  tit obtaining the best possible meshing between

  the planet gears 12 and the ring gear.

  The above shows that very few ingredients

  sants are necessary in this type of combination and, therefore, the transmission according to the invention is

  advantageous both in terms of costs

  brication and maintenance costs. In addition, his instal-

  lation in good position is easy because the number of rings

  tions causing alignment errors is reduced.

  As is clear from the above, the information

  vention is by no means limited to those of its modes of

  implementation and application which have just been described from

  more explicitly; on the contrary, it embraces

  are the variants that can come to mind of the techni-

  in this area without departing from the framework or the

tee of the present invention.

Claims (3)

Claims   1. Gear transmission for device   elevator, said transmission comprising an undercarriage   cylindrical granaries (2) with one or more floors   stages partially or completely rotatably supported   talement inside a cable drum (1), characterized in that the cylindrical train (2) and a planetary train (3) are integrated so as to constitute a gear transmission inside a cylindrical envelope, this transmission being placed inside a cable drum (1).   2. Transmission according to claim 1,   characterized in that the planetary gear (3) is coupled   plied both to the cylindrical train (2) and to the drum   cable (1) via tooth couplings (4,5).   3. Transmission according to claim 1 or 2, characterized in that the cylindrical train (2) and the   planetary gear (3) are housed in a cylindrical drum   that (6) on which the cable drum is supported turning lesson.