FR2664346A1 - Gearing casing, particularly for gearing with straight-cut gears/worms, or worm gears - Google Patents

Abstract

In a gearing casing, particularly for gearing with straight-cut gears/worms or worm gears which exhibit bearing zones for gear pieces and an assembly opening through which the latter may be installed in the casing, one (34, 49) of the bearing zones located at the assembly opening (7) is produced so as to exhibit a passage opening (35) extending in the assembly direction for gearing components, the said bearing zone advantageously constituting a support for a bearing which is interrupted in order to form the passage opening (35).

Description

I Gear housing, in particular for gear wheels

  straight / worm or worm gears

  The present invention relates to a gearbox

  strokes, in particular for gear wheels

  straight / worm or worm gears, which pre-

  has support areas for gear parts and a mounting opening through which they can

  can be placed in the gear case.

  In the case of known gear housings, the gear parts are placed inside the casing through the mounting opening. The sets of straight toothed and worm gear wheels comprise parts of dimensions different from so that in the case of known gear housings, provision is made for the installation of a large piece of gears, such as, for example, a worm wheel, an additional mounting opening. gears is for example open on one side and must be closed by a cover after the installation of the worm wheel This poses problems

  regarding the sealing of this cover Ce-

  it is also used at the same time also for mounting the shaft concerned. As a result, the cover is subjected to transverse forces during service.

  gear case, posing sealing problems

additional ification.

  The object of the present invention is to produce the gear housing defined above in such a way that larger or smaller gear parts can also be mounted in the housing by passing through a single mounting opening. This goal is achieved, with regard to a casing

  of gears, in particular for gears with toothed wheels

  straight ture / worm or worm gears, which has bearing areas for gear parts and a mounting opening through which they can be placed in the gear housing,

  according to the invention by the fact that in the region of the

  mounting groove one of the support zones is provided so as to present a passage opening, extending

  in the mounting direction, for gear parts.

  Due to this passage opening in the region of the support zone, a more or less large piece of gears, for example a worm wheel, can

  be set up through the one and only

  mounting housing for the gear housing according to the invention

  tion An additional cover can therefore be saved so that not only the manufacturing but also the

  mounting of the gear to be put in place is simply

  The large piece of gears is slid through the mounting opening in such a way that it penetrates through the passage opening partially into the bearing area at the mounting opening. passage opening extends in the mounting direction, i.e. towards the inside of the housing, the large

  gear piece can be put in place without difficulty.

  Since an additional cover is not necessary

  re, the sealing problems associated with such additional covers are avoided The gear case according to

  the invention is distinguished by its simple construction method

  ple and can be easily mounted In such a housing

  grenages can be mounted, through the mounting opening on the motor side, optionally a set of straight teeth /

  worm wheels or a set of worm wheels.

  In a preferred embodiment of the invention, the abovementioned support zone constitutes a bearing support which is interrupted to form said passage opening. Advantageously, the distance between the opening of

  passage and the edge facing it from the opening of my-

  tage is less than the distance between this edge of the opening

  mounting structure and the lowest point, opposite

  of the passage opening, of the abovementioned support zone.

  According to other characteristics of the invention, said bearing support extends over an angular interval

  about 3000 and is connected by spacers to two pa-

  side kings and at the bottom of the gear housing In addition, the latter, which join the side wall containing the mounting opening, advantageously have

  bearing zones, aligned with each other, for a tree.

  According to another characteristic of the invention, these latter bearing zones each constitute a bearing support and preferably the bearing support on the outlet side is supported on the bearing support on the inlet side in the region of the mounting opening, the support side landing

  output and the interrupted bearing support being advantageous

  linked together in the region of the opening of

  mounting by at least one spacer.

  Another advantageous characteristic of the invention

  tion consists in that at least the support zone located in

  the region of the mounting opening and preferably all

  your support zones are inside the gear housing.

  Advantageously, the gear housing is symmetrical.

  stick relative to a longitudinal plane of symmetry and preferably made in one piece.

  The invention is explained in more detail below.

  under using an exemplary embodiment illustrated in the accompanying drawings in which: Figure 1 shows, in section along the line

  C-D of Figure 2, a gear housing according to the invention-

  tion; Figure 2 is an elevational view of a side wall, having a mounting opening, of the gear housing according to Figure 1; Figure 3 is a sectional view along line A-B of Figure 1; 4 shows, on a larger scale and in perspective, the gear housing according to the invention of Figures 1 to 3; Figure 5 shows the gear case similar to Figure 3, a worm gear being mounted therein; and FIG. 6 represents the casing in a similar manner to FIG. 1, a worm gear being therein

mounted.

  As shown in Figure 4, the housing

  grenages is produced in the form of a block and presents

  lateral kings 1 to 4 which at their lower end

  are connected to each other by a bottom 5 and at the level

  from their upper end by an upper wall 6.

  In the side wall 4 there is a mounting opening 7 through which the various constituent elements

  of the gear can be placed in the housing.

  The side wall 2, opposite the side wall 4 having the mounting opening 7, as well as the bottom 5 and the upper wall 6 do not have any opening Le

  housing has a rectangular section and its two sides

  lateral kings 1 and 3 joining the wall at right angles

  side 4 which has the mounting opening 7 contains

  a support opening 8 and 9 respectively in the

  which a shaft 10 (Figure 5) can be mounted so that

be able to turn.

  The two support openings 8, 9 are located in the half of the casing which comprises the upper wall 6 and are coaxial (FIG. 3) The two support openings 8 and 9 are limited respectively by an enlarged annular edge 11; 12 which extends inwards and outwards beyond the respective side wall 1; 3 In order to allow them, during the operation of the gear mounted in the housing, to surely absorb the forces exerted,

  the side walls 1 and 3 are made thick-

  located over the entire periphery of the support openings 8 and 9.

  The annular edges 11, 12 preferably have in the middle of their axial width an annular groove 13; 14 in which a retaining ring 15 can be mounted; 16 (Figure 5) for a rolling bearing 17; 18 By means of rolling bearings 17; 18 shaft 10 is supported in

  the support openings 8, 9 so that they can rotate.

  As shown in Figure 5, the rolling bearings 17; 18 are in contact with the ends, one in

  look of the other, of the annular edges 11, 12 inside

  gear case In order to prevent any penetration

  tion of soiling and the like through the support openings 8; 9 these are sealed by means of seals 19; 20, which are preferably spring-loaded lip seals which seal against the shaft 10 by means of a

  sealing lip 21; 22 as well as an anti-dust lip

  siere 23; 24 disposed upstream The seals 19, 20 are in a known manner put in place from the outside of the casing by pressure in the support openings 8, 9 so that they are housed with a tight fit in the

support openings.

  The side wall 2, which is opposite the mounting opening 7, has an inside edge

  mounting 25 which, extending around the entire circumference and

  projecting inward (Figures 1 and 3), surrounds a mounting opening 26 The inner wall 27 of the mounting edge 25 is provided with a heel 28 against which a rolling bearing 29 (Figure 6) is supported in the mounted position By means of this bearing one of the ends of an endless screw 30 is supported so as to be able to rotate

  in the mounting opening 26 So that the forces produced

  when using the gear mounted in the housing

  ter can be reliably absorbed, the mounting edge 25 widens from its front side towards

the side wall 2.

  The mounting edge 25 is located, as shown

  in Figures 1 and 3, in the region below

  support openings 8 and 9 whose axes 31, 32 extend

  tooth perpendicular to the axis 33 of the mounting edge 25.

  Opposite the annular mounting edge 25

  found in the region of mounting opening 7, coaxia-

  Lement to the latter, another annular mounting edge 34 (FIGS. 1, 2 and 4) which, like the mounting edge 25,

  is arranged entirely inside the casing

  at the mounting edge 25, the mounting edge 34 does not extend

  tends not completely on 3600 but is interrupted

  pu to form a passage opening 35 (Figures 2 and

  4) The mounting edge 34 extends over an angular interval

  area of about 3000 Thus the rolling bearing 36 to lo-

  Ger in the mounting edge 34 (Figure 6) is still under

  reliably held over a peripheral interval sufficiently

  important so that stresses experienced during use

  sation of the gear housed in the housing can be supported without difficulty The ends 37 and 38 (figure

  2) limiting the passage opening 35 are preferably

  each on a radius of the annular mounting edge 34 for an observer looking in the axial direction of the annular mounting edge (FIG. 2) Thus the passage opening 35 can be provided as soon as the casing is produced in one piece. The edge mounting annular 34 is connected in total by five spacers 39 to 43 to the side walls 1 and 3 and to the bottom 5 (Figures 2 and 4) As further shown in Figure 2, the mounting edge 34 with

  the spacers 39 to 43 is arranged symmetrically with respect to

  bearing in the longitudinal plane of symmetry 44 of the casing Since the annular mounting edge 34 is only connected to the side walls 1, 3 and to the bottom 5 by the spacers

  relatively narrow 39 to 43, weight savings con-

siderables are carried out.

  In the inner wall 45 (Figures 1 and 4) of the annular mounting edge 34 is formed a groove 46 for a retaining ring 47 (Figure 6) by means of which the

  rolling bearing 36 is secured in an axial direction.

  It appears from Figures 1 and 4 that the bearing edge

  or support ring 34 is connected by an additional spacer

  nelle 48 at the annular bearing edge 11 The spacer 48 is at the height of the spacer 39 and extends to a

  short distance from the passage opening 35 to the side

  neighboring lateral king 1 of the casing (FIG. 4) In addition,

  the spacer 48 extends in the axial direction of the openings

  mounting tures 26 and 49, the latter of which is limited by the annular bearing edge 34 The spacer 48 supports the annular bearing edge 34 relative to the annular bearing edge on the outlet side 11 The two annular bearing edges 34 and 11 constitute force absorption zones when the gear housed in the casing is used.

  regard the spacer 48 prevents relative relative movements

  Sirable between the annular bearing edges 34 and 11 The annular bearing edges 12 and 25 constitute, just as

  the support edge 34, bearing supports.

  The housing is used to receive a set of toothed wheels.

  straight ture / worm gear or a set of worm gear wheels.

  The different components of the gear are

  introduced through the mounting opening 7 in the car-

  ter and placed in their mounting position Since the annular mounting edge 34 has the passage opening 35, it can also be introduced into the casing

  a toothed wheel whose diameter is greater than the distance

  ce between the upper spacers 39, 43 arranged horizontally

  horizontally at the same height and the opposite edge 50 of the

  mounting bracket 7 (figure 4) A toothed wheel of this

  dimension is required, when it is placed in the

  ter, so that it extends through the passage opening 35 into the mounting opening 49 Thus a large toothed wheel can be easily mounted in the casing without requiring a second opening of

  mounting in another side wall of the housing.

  FIGS. 5 and 6 show a two-stage worm gear whose constituent elements have all been placed in the casing through the mounting opening 7 The worm wheel 51 is mounted on a

  sleeve 52 which at its end remote from the rolling bearing

  ment 17 has a radial flange 53 to which the wheel

  worm gear 51 is preferably fixed removably

  ble The worm wheel 51 has, in its front face located on the rolling bearing side 18, a suitable recess in which engages the radial flange 53 of the socket 52 (FIG. 5) The socket 52 is itself even fixedly connected in rotation to the shaft 10 by means of a key 54 The rolling bearing 17 is secured in one of the axial directions by the retaining ring 15 and in the other axial direction by the sleeve 52 which bears against the rolling bearing The opposite rolling bearing 18 is secured in one direction by the retaining ring 16 and in

  the other direction by a shoulder 55 in the peripheral surface

  risk of the shaft 10 The rolling bearing 18 is supported

  against this shoulder 55, as shown in FIG. 5.

  The worm wheel 51 meshes with the worm 30 whose axis 56 is perpendicular to the axis 57 of the worm wheel The worm 30 is mounted in the bearing support 25, so as to be able to rotate, by means of the rolling bearing 29 which bears against the heel 28 of the bearing support and is thus secured in position in one of the axial directions In the other axial direction the rolling bearing 29 is secured by a flange 58 of the worm against which the rolling bearing bears The worm 30 has on the opposite side another flange 59 against which the rolling bearing 36 which on the other side is axially secured

  in position by the retaining ring 47.

  The diameter of the worm wheel 51 is su-

  greater than the distance 60 (FIG. 6) between the upper edge of the mounting opening 7 and the top of the spacers 39, 43 Due to the passage opening 35 this wheel

  worm gear 51 can nevertheless be guided through the

  mounting groove 7 in the housing The distance 61 between the upper edge 50 of the mounting opening 7 and the lowest point 62 of the annular mounting edge 34 is greater than the diameter of the worm wheel 51. The shaft 10 is slid through one of the two support openings 8 and 9 inside the casing in which the wheel

  worm gear 51 was previously set up in the fa-

  lesson described Then the worm 30 with the bearings to

  bearing 29 and 36 can be mounted through the opening

mounting structure 7.

  The end 63 of the worm 30, which beyond

  of the rolling bearing 36 extends in the direction of the opening

  re mounting 7, fixedly rotates a wheel

  toothed 64 with which a toothed wheel 65 meshes with an ar-

  drive bre 66 The two gear wheels 64 and 65 which mesh with each other are located in the mounting opening 7, while the drive shaft 66 extends

  through the mounting opening 7 out of the housing.

  On the edge 67 surrounding the mounting opening 7 (FIG. 4) is screwed a connection flange 68 (FIG. 6) by means of which the gear housing is clamped on a motor (not shown). The edge 67 has on its periphery of suitable holes 69 (figure 4) for screws or bolts by means of which the connection flange (68)

can be screwed on edge 67.

  In the gear housing described all the bearing or mounting zones 8, 9, 25, 34 are arranged inside the gear housing made in the form of

  block Thus, a very high overall stiffness is obtained.

  ble of the gear case Since no cover

  serving as a tree support and subjected to transverse forces

  dirty is not necessary, the sealing problems associated with 1 1 of such mounting covers do not arise Finally, this gear housing can be manufactured very easily and

  especially advantageously as for its cost price.

at

Claims (7)

  1 Gear housing, especially for   shot blasting with straight teeth / worm or for   worm gear, which has bearing areas for gear parts and a mounting opening through which they can be placed in the housing, characterized in that in the region of   the mounting opening (7) one (34, 49) of the application zones   then, is made so as to present a passage opening (35), which extends in the mounting direction, for gear parts.   2 gear housing according to claim 1,   characterized in that said support zone (34, 49) constitutes   kills a bearing support which is interrupted to form the passage opening (35).   3 gear housing according to claim 1   or 2, characterized in that the distance (60) between the opening   passage (35) and the opposite edge (50) of the mounting opening (7) is less than the distance (61) between this edge (50) of the mounting opening (7) and the place lower (62) of the support zone (34, 49) which is located   opposite the passage opening (35).   4 gear housing according to claim 2   or 3, characterized in that the bearing support (34) extends   tends over an angular interval of about 3000.   Gear housing according to any one   claims 2 to 4, characterized in that the support   bearing (34) is connected by spacers (39 to 43) to   side walls (1, 3) and at the bottom (5) of the housing grenades.   6 Gear housing according to any one   of the preceding claims, characterized in that the   side walls (1, 3), which join the side wall (4) containing the mounting opening (7), have bearing zones (11, 12) aligned with one another for a shaft (10) 7 Housing gears according to claim 6,   characterized in that the support zones (11, 12) constitute   each kill a bearing support (11, 12) and in that   preferably the bearing on the outlet side (11) is sup-   brought into contact with the bearing support (34) at the mounting opening (7).   8 gear housing according to claim 6   or 7, characterized in that the bearing support on the outgoing side   tie (11) and the bearing support (34) are interconnected in the region of the mounting opening (7) by at least a spacer (48).   9 Gear housing according to any one   of the preceding claims, characterized in that at   minus the support zone (34, 49) located in the region of the mounting opening (7) and, preferably, all the support or mounting zones (11, 12; 25, 26; 34, 49 )   located inside the gear case.   Gear housing according to any one   of the preceding claims, characterized in that it is   symmetrical about a longitudinal plane of symmetry   (44) and is preferably made in one piece.