FR2580046A1 - Improvements to couplings with teeth - Google Patents

Abstract

Coupling with teeth formed from two half-sleeves 1 and 2 of different diameters, carrying end flanges 3 and 4 fitted with assembly means, these half-sleeves sliding on one another and carrying internal teeth of pitch diameters close to those of the half sleeves, whilst the rotors 6 and 7 carry external teeth of different pitch diameters, corresponding to those of the preceding teeth and placed so as to face these when the half-sleeves are securely fastened.

Description

The present invention relates to couplings i teeth, that is to say

  say i couplings made by means of a sleeve to

  internal teeth cooperating with two rotors carried by the shaft line.

  Known couplings of this type are satisfactory with regard to operation in operation, but they offer drawbacks with regard to uncoupling or "tripping". In most cases, in fact, triggering requires the displacement of one of the rotors or requires a translation of all or part of the sleeve which increases

  considerably the overall dimensions of the coupling.

  The object of the invention is to remedy these drawbacks and to produce a coupling of this type: - allowing rotation with a single rotor, the other remaining at rest; - allowing the disassembly of one of the rotors, the other remaining in place, without intervention on the latter; - The above two operations resulting in no increase in length of the size of the coupling assembly; - while ensuring smooth running operation with optimal misalignment capacity; all of these benefits being achieved by little means

expensive and easy to maneuver.

  The subject of the invention is a coupling with teeth, that is to say in which two toothed rotors are connected by a sleeve i internal teeth and it is characterized in that: - the sleeve consists of two half-sleeves of different diameters ; - the small diameter sleeve has an outwardly oriented end flange with an external diameter less than or equal to the internal diameter of the large diameter sleeve; - the large diameter sleeve has an inwardly oriented end flange and the internal diameter greater than or equal to the external diameter of the small diameter sleeve; - Each half-sleeve has an internal toothing with a pitch diameter slightly less than the internal diameter of the sleeve; - The rotors have external teeth of different pitch diameters corresponding to those of the half-sleeves and placed opposite these when the flanges of the half-sleeves are in contact; - the flanges carry fixing and positioning means

  relative such as holes and screws or bolts.

  The operation of the device is as follows: For coupling, the flanges are brought into contact by their internal faces and secured between them by bolting or screwing between them. The assembly then forms a one-piece sleeve whose teeth

  mesh with the teeth of the rotors.

  Triggering is carried out by separating the two half-sleeves and by translating the large-diameter half-sleeve until the large-diameter rotor is released. The latter can therefore remain in operation or be dismantled independently of the first and

  without increasing the size of the coupling.

  The invention also relates to the following provisions: - a centering ring is provided on at least one of the half-handles, cooperating with the periphery of the flange of the other half-sleeve when these are assembled: - the internal toothing of at least one of the half-sleeves is placed in the vicinity of the end of this half-sleeve which is opposite to that which carries the terminal flange; - Means are provided for maintaining the axial position of the assembled sleeves; - Means such as at least one removable radial spindle, are provided for maintaining the axial and radial position of the half-sleeves in the release position; the distance separating the external face of the end flange of the sleeve of small diameter from the toothing of this sleeve is less than the distance separating this same toothing from the end face of the rotor of large diameter which is closest to it; the external diameter of the flange of the half-sleeve of small diameter is less than the internal diameter of the teeth of the half-sleeve of large diameter; - the length of the large diameter half-sleeve is shorter,

  equal to or slightly greater than that of the other sleeve.

  The invention is illustrated by the appended drawing in which: FIG. I is a view in axial section of an exemplary embodiment of a coupling according to the invention in the coupling position; Figure 2 is a similar view in the release position;

  Figure 3 is a half-section along AA of Figure 1.

  Referring to these figures, it can be seen that the coupling according to the invention is composed of two half-sleeves 1 and 2, of diameters

significantly different.

  The half-sleeve 1, of smaller diameter, carries a terminal flange 3 oriented towards the outside and the half-sleeve 2 carries a terminal flange 4 oriented towards the inside. The external diameter of the flange 3 is

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  Inferior (or equal) to the internal diameter of the sleeve 2 and the internal diameter of the flange 4 is greater (or equal) to the external diameter of the

sleeve 1.

  Thus, the sleeve 2 can slide on the sleeve I between two positions: that of Figure 1 o the flanges 3 and 4 are joined and assembled, for example by screws or bolts 5, and that of Figure 2, o the

  half sleeve 2 surrounds half sleeve 1.

  The rotors 6 and 7 have teeth 8 and 9 of different primitive diameters to which correspond the teeth 10 and 1 I carried by the

half sleeves 1 and 2.

  Preferably, and as shown, the internal diameter of the toothing 11 is greater than the external diameter of the flange 3, so that the sleeve 2 can be removed, for triggering up to a

  position such that the rotor 7 is completely disengaged from the sleeve 2.

  Likewise, the distance between the toothing 10 and the external end face of the flange 3 is less than the distance of this toothing from the face

12 of rotor 7.

  Thus, in the release position (Figure 2), the rotor 7 is completely released; it can therefore not only continue to rotate,

  but also be dismantled without interference with the rotor 6.

  In the position of Figure 1, the axial position of the assembly of the sleeves 1 and 2 assembled will be fixed by any suitable known means (and not shown) such as shaft end washers or other means already

  i used for this purpose in couplings of this type.

  DamS the position of Figure 2, the sleeve 2 is fixed axially and radially on the sleeve 1 and optionally on the rotor 6 by at least one spindle or radial rod 13, removable, which passes through the perforations provided in the sleeves 1 and 2 and can be screwed into the

sleeve 2.

  At least one of the teeth O10 and 11 is preferably placed in the vicinity of the ends of the half-sleeves opposite the flanges 3 and 4 of

  in order to optimize the market misalignment capacity.

  Similarly, there is provided on the sleeve 1, a centering ring 14 cooperating with the periphery of the flange 4 of the sleeve 2, when the sleeves are assembled. Such a ring could as well, or also, be provided inside the sleeve 2, in the vicinity of the flange

  4, and cooperating with the periphery of the flange 3.

  It follows from the above description, that the desired results

  are obtained by the coupling of the invention and in particular with regard to the independent rotation, the disassembly of one of the rotors, the

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  misalignment capacity, simplicity of maneuver and construction.

  The overall dimensions in the triggered state (FIG. 2) are not increased as long as the length of the sleeve 2 is not substantially greater than

that of the sleeve 1.

  The invention is not limited to the example shown and can be

  produced in various dimensions and different shapes.

Claims (6)

RVENDICATIONS   1. Gear coupling comprising two toothed rotors (6 and 7) connected by a sleeve with internal teeth, characterized in that the sleeve consists of two half-sleeves (1 and 2) of different diameters, the sleeve of small diameter ( 1) carrying a terminal flange (3) oriented towards the outside and of external diameter at most equal to the internal diameter of the large diameter sleeve (2) which carries a terminal flange (4) oriented towards the inside and of greater internal diameter or equal to the external diameter of the sleeve (1), each half-sleeve (1, 2) has internal teeth (10, 11) of pitch diameter slightly less than the internal diameter of the sleeve, the rotors (6, 7) have teeth external primers of different diameters corresponding to those of the half-sleeves, these teeth being placed opposite to those of the half-sleeves when their flanges are in contact, and the latter bearing   means of solidarity and relative positioement.   2. Device according to claim 1, characterized in that a centering ring (14) is provided on one tu minus half-mmchoas, cooperating with the periphery of the flange of the other half-sleeve when   these are assembled and ensure their centering.   3. Device according to any one of the preceding claims,   characterized in that the internal toothing of at least one of the half-sleeves is placed in the vicinity of the end of this sleeve which   is opposite to that which carries the terminal flange.   4. Device according to any one of the preceding claims,   characterized in that means are provided for maintaining in position axial of the assembled sleeves.   5. Device according to any one of the preceding claims,   characterized in that means such as at least one removable radial spindle are provided for maintaining the axial and radial position of the   half sleeves in release position.   6. Device according to any one of the preceding claims,   characterized in that the distance separating the external face of the end flange from the sleeve of small diameter of the toothing of this sleeve is less than the distance separating this same toothing from the end face   nearest large diameter rotor.