Module for transmitting a rotation

Abstract

The invention relates to a module (1) for transmitting a rotation, comprising: - a first pinion (10), - a second pinion (11), characterized in that the transmission module (1) further comprises: - a toothed wheel (12) with a first ring of teeth (120) and a second ring of teeth (121) of different diameters, the toothed wheel (12) having an axis of rotation (A), - the first pinion (10) being configured to engage with the first ring of teeth (120) of the toothed wheel (12) and the second pinion (11) being configured to engage with the second ring of teeth (121) of the toothed wheel so as to transmit the rotation of the first pinion (10) to the second pinion (11).

Description

Rotation transmission module

[0001] The present invention relates to a rotation transmission module. It also relates to a lighting device comprising such a transmission module. It finds a particular, but not limiting, application in vehicles.

[0002] In the automotive field, it is common knowledge among those skilled in the art to have a gear directly connected to a headlight module. This gear is used to tilt the module, creating a beam pattern with a cutoff point, for example, to implement a low beam function. There is an external access point to the headlight, allowing access to the gear and its rotation to tilt the module. This rotation can be done manually using a tool or automatically with a motor.

[0003] One drawback of this prior art is that significant torque is required to rotate the pinion and thus tilt the light module. The risk is that the torque value may exceed the customer's specifications, namely those of the car manufacturer for the automotive application.

[0004] In this context, the present invention aims to provide a rotation transmission module that solves the aforementioned drawback.

[0005] To this end, the invention proposes a rotation transmission module comprising: - a first pinion having a first diameter, - a toothed wheel with a first ring of teeth, the first ring having a second diameter, and a second ring of teeth, the second ring having another third diameter different from the second diameter, said toothed wheel having a first axis of rotation, - a second pinion having a fourth diameter, - said first pinion being configured to cooperate with said first ring of teeth of the toothed wheel and said second pinion being configured to cooperate with said second ring of teeth of the toothed wheel so as to transmit said rotation of said first pinion to said second pinion.

[0006] As we will see in detail later, thanks to the transmission of rotation between the first ring of teeth and the second ring of teeth of the gear via the first pinion and the second pinion, the torque applied to the transmission module is multiplied, which allows its value to be reduced at the input of the transmission module.

[0007] According to non-limiting embodiments, said transmission module may further comprise one or more additional features taken alone or in combination, from among the following.

[0008] According to a non-limiting embodiment, said first crown of teeth has a larger external diameter than said second crown of teeth.

[0009] According to a non-limiting embodiment, in which said first crown of teeth is peripheral to said second crown of teeth. By "peripheral" it is understood that said crowns of teeth are located on the same face of said toothed wheel, and that said first crown of teeth surrounds said second crown of teeth, in particular in a view normal to said same face.

[0010] According to a non-limiting embodiment, said second pinion has a larger external diameter than said first pinion.

[0011] According to a non-limiting embodiment, said first pinion and said second pinion are arranged with respect to each other at an angle between 75° and 180°.

[0012] According to a non-limiting embodiment, said first pinion and said second pinion are conical so as to have axes of rotation not parallel with the axis of rotation of said gear.

[0013] By "conical" we understand that the teeth form a crown of conical shape or having a conical portion.

[0014] According to a non-limiting embodiment, said first ring of teeth and said second ring of teeth are arranged at different depths, a depth being defined parallel to the first axis of rotation of said toothed wheel.

[0015] According to a non-limiting embodiment, said transmission module has a reduction ratio that is less than 1.

[0016] According to a non-limiting embodiment, the first ring of teeth and the second ring of teeth are concentric with respect to the axis of rotation of the gear wheel.

[0017] According to a non-limiting embodiment, said transmission module has a reduction ratio which is equal to (Z1xZ3) / (Z2xZ4) with Z1 the number of first teeth of the first pinion, Z2 a number of teeth of the first ring of teeth, Z3 the number of teeth of the second ring of teeth, and Z4 the number of second teeth of the second pinion.

[0018] A vehicle lighting device is also proposed comprising: - a housing, - at least one lighting module integrated into said housing, notable in that the lighting device further comprises: - a transmission module according to any one of the preceding claims, said first pinion being integrated into said housing and free to move and being adapted to be adjusted by a tool, said toothed wheel being integrated into said housing and free to move, said second pinion being integrated into said housing and free to move and configured to cooperate with said lighting module so as to set it in motion.

[0019] In non-limiting embodiments, the lighting device may further comprise one or more additional features, taken alone or in combination, from among the following. It should be noted that the features involving only the transmission module also apply to the latter independently of the lighting device.

[0020] According to a non-limiting embodiment, the first pinion has a second axis of rotation.

[0021] According to a non-limiting embodiment, the first gable has a first end configured to be accessible from the outside by an external access to the lighting device.

[0022] According to a non-limiting embodiment, the first pinion has a second end with first teeth configured to cooperate with the first ring of teeth of the gear.

[0023] According to a non-limiting embodiment, the first pinion has a first rod connecting the first end and the second end.

[0024] According to a non-limiting embodiment, the second pinion has a third axis of rotation.

[0025] According to a non-limiting embodiment, the second pinion has a third end configured to be connected directly or indirectly to at least one light module.

[0026] According to a non-limiting embodiment, the second pinion has a fourth end with second teeth configured to cooperate with the second ring of teeth of the gear.

[0027] According to a non-limiting embodiment, the second pinion has a second rod connecting the third end and the fourth end.

[0028] According to a non-limiting embodiment, the third end is configured to be connected to a worm screw.

[0029] According to a non-limiting embodiment, the lighting device comprises a cassette including said worm screw.

[0030] According to a non-limiting embodiment, the worm screw is configured to be connected to at least one light module.

[0031] According to a non-limiting embodiment, the housing comprises: - a first location configured to accommodate the first pinion; - a second location configured to accommodate the toothed wheel; and - a third location configured to accommodate the second pinion.

[0032] According to a non-limiting embodiment, the first location is in the form of a longitudinal passage.

[0033] In a non-limiting embodiment, the first location leads to an opening configured to accommodate the first end of the first gable. This opening allows access to the first gable by a tool from outside the lighting device.

[0034] According to a non-limiting embodiment, the first pinion is thus held in the first location and it can at the same time rotate in the first location.

[0035] According to a non-limiting embodiment, the first location leads to the second location.

[0036] According to a non-limiting embodiment, the second location is cylindrical in shape.

[0037] According to a non-limiting embodiment, the gear is thus held in the second location and can at the same time rotate in the second location.

[0038] According to a non-limiting embodiment, the second location leads to the third location.

[0039] According to a non-limiting embodiment, the third location is in the form of a longitudinal passage.

[0040] According to a non-limiting embodiment, the second pinion is thus held in the third location and it can at the same time rotate in the third location.

[0041] The invention and its various applications will be better understood by reading the following description and examining the accompanying figures:

[0042] is a perspective view of a rotation transmission module according to the invention, said transmission module comprising a first pinion, a second pinion and a toothed wheel,

[0043] is an enlarged perspective view of the first pinion, the second pinion, and the gear of the transmission module of the,

[0044] is an enlarged front view of the gear of the transmission module, said gear comprising a first ring of teeth and a second ring of teeth,

[0045] is an enlarged perspective view of the first pinion of the transmission module of the,

[0046] is an enlarged perspective view of the second pinion of the transmission module of the,

[0047] is a view of the cooperation between the first pinion and the first ring of teeth of the gear wheel,

[0048] is a view of the cooperation between the second pinion and the second ring of teeth of the gear wheel of the,

[0049] is a front and side view of the cooperation between the first teeth of the first pinion of the gear and the teeth of the first ring gear of the gear.

[0050] is a front and side view of a cooperation between the second teeth of the second pinion of the gear and the teeth of the second ring gear of the gear.

[0051] is a view of a positioning according to a non-limiting embodiment of the first pinion and the second pinion relative to a first axis of rotation of the toothed wheel of the transmission module of the,

[0052] is a perspective view of the transmission module cooperating with a worm screw, according to a non-limiting embodiment,

[0053] is a schematic view of a lighting device comprising a housing, a support, at least one lighting module and a transmission module,

[0054] is a rear perspective view of part of a lighting device including the transmission module of the,

[0055] is a rear perspective view of the casing of part of a lighting device including the transmission module.

[0056] Identical elements, whether structural or functional, appearing on different figures retain the same references unless otherwise specified.

[0057] The rotation transmission module 1 according to the invention is described with reference to Figures 1 to 11. In the following description, the rotation transmission module 1 is also referred to as transmission module 1. The transmission module 1 allows at least one light module 21 of a light device 2 of a vehicle 3 (illustrated in the figure) to be tilted. In a non-limiting embodiment, the vehicle 3 is a motor vehicle. The motor vehicle 3 is a combustion engine, electric, or hybrid vehicle. In a non-limiting embodiment, the light device 2 is a projector. The light device 2 comprises one or more light modules 21. In a non-limiting embodiment, the light device 2 comprises a single light module 21. This non-limiting embodiment is taken as a non-limiting example in the following description.

[0058] As illustrated on the, the transmission module 1 of a rotation comprises: - a first pinion 10, - a second pinion 11, - a toothed wheel 12 comprising a first ring of teeth 120 and a second ring of teeth 121 and having a first axis of rotation A.

[0059] It should be noted that in the context of the invention the term pinion is used independently of its diameter and that this can be greater or less than or equal to that of the associated ring of teeth of the gear 12. In the context of the invention, a pinion includes in particular a shaft and teeth and the shaft materializes the axis of rotation of the pinion.

[0060] The first pinion 10 is configured to cooperate with the first ring of teeth 120 of the gear 12. The first pinion 10 has a second axis of rotation B. It has: - a first end 10.1 configured to be accessible from the outside by an external access to the light device 2, - a second end 10.2 with first teeth 100 configured to cooperate with the first ring of teeth 120 of the gear 12, - a first rod 10.3 connecting the first end 10.1 and the second end 10.2.

[0061] The first pinion 10 is configured to be rotated from outside the light device 2. Rotation is done manually using a tool or automatically using a motor which allows a first torque M1 to be applied.

[0062] When the first pinion 10 is rotated by a first torque M1 (illustrated in the figure), the interaction between the first teeth 100 and the first ring of teeth 120 of the gear 12 causes the gear 12 to rotate. The first pinion 10 has a first angular velocity W1 (illustrated in the figure) when it is rotated. The first ring of teeth 120 has a second angular velocity W2 (illustrated in the figure) when it is rotated.

[0063] The second pinion 11 is configured to cooperate with the second ring of teeth 121 of the gear 12. The second pinion 11 has a third axis of rotation B'. It has: - a third end 11.1 configured to be connected directly or indirectly to the light module 21, - a fourth end 11.2 with second teeth 110 configured to cooperate with the second ring of teeth 121 of the gear 12, - a second rod 11.3 connecting the third end 11.1 and the fourth end 11.2.

[0064] When indirectly connected to the light module 21, the third end 11.1 is advantageously connected to a cassette 24 comprising a worm gear 23 as illustrated on the figure which itself is connected to the light module 21. As a reminder, the worm gear can move forward or backward.

[0065] In a non-limiting embodiment, the second pinion 11 has a larger internal diameter Di4 (illustrated in Figure 1) than that Di1 (illustrated in Figure 2) of the first pinion 10. This allows the second pinion 11 to rotate more slowly than the first pinion 10. Consequently, there is less torque in the first pinion 10 than in the second pinion 11. Thus, when the first pinion 10 completes one full revolution, i.e., a 360° rotation, the second pinion 11 completes less than one full revolution. In a non-limiting embodiment, when the first pinion 10 completes a 360° rotation, the second pinion 10 completes half a rotation, 180°. Note that an internal diameter is also commonly called a root diameter. It corresponds to the circle connecting the bases of the grooves located between the teeth.

[0066] When gear 12 is rotated via the first pinion 10, the interaction between the second teeth 110 and the second ring of teeth 121 of gear 12 causes the rotation of the second pinion 11. This results in the transmission of rotation from the first pinion 10 to the second pinion 11 via gear 12. Gear 12 reduces the first torque M1 to a second torque M4 (illustrated in the figure). The second ring of teeth 121 has a third angular velocity W3=W2 (illustrated in the figure), and the second pinion 11 has a fourth angular velocity W4 (illustrated in the figure).

[0067] In a non-limiting embodiment, the first pinion 10 and the second pinion 11 are conical. Thus, there is a second axis of rotation B and a third axis of rotation B' different from that A of the gear 12. The second axis of rotation B and the third axis of rotation B' are therefore not parallel to the first axis of rotation A of the gear 12. By conical, it is understood that the first teeth 100 extend along the second axis of rotation B with a first slope 10.4 from a first base 10.5 as illustrated in the figure. Similarly, by conical, it is understood that the second teeth 110 extend along the third axis of rotation B' with a second slope 11.4 from a second base 11.5 as illustrated in the figure. It should be noted that the first ring of teeth 120 and the second ring of teeth 121 of the gear 12 also have a conical shape.Conical shapes allow the second axis of rotation B and a third axis of rotation B' to take different orientations relative to each other, including non-parallel orientations.

[0068] The conical shape allows: - the transmission of movement in another direction (with a first angle θ of 90° or other) with very good alignment between the input and output, namely a very good coupling is obtained between the first teeth 100 and the second teeth 110 respectively of the first pinion 10 and the second pinion 11. - a very compact transmission module which allows it to be installed in compact places, - very good efficiency in terms of power transmission and this with almost no losses.

[0069] In a non-limiting embodiment, the first teeth 100 of the first pinion 10 and the second teeth 110 of the second pinion 11 are of the same length. This allows for a compact design of the transmission module 1.

[0070] In a non-limiting embodiment, the first pinion 10 and the second pinion 11 are arranged relative to each other at a first angle θ between 0° and 180°. The angle of 0° corresponds to pinions located on the same side of the gear 12. The angle of 180° corresponds to pinions located diametrically opposite each other on the gear 12. The first angle θ is the angle between the second axis of rotation B of the first pinion 10 and the third axis of rotation B' of the second pinion 11. In a non-limiting variant, the first pinion 10 and the second pinion 11 are arranged relative to each other at a first angle θ between 75° and 180°. This range allows the first pinion 10 to be positioned so that it is easily accessible from the outside.Furthermore, if the first pinion 10 and the second pinion 11 are arranged between them at a first angle θ between 75° and 165°, this also allows easy connection with the light module which can be located laterally with respect to the external access area of ​​said second axis of rotation B of the first pinion 10, and adjustment of said light module in particular when the latter is not accessible from the outside by a straight-shaped tool.

[0071] In a non-limiting embodiment illustrated in Figure 1, the first angle θ is equal to 90°. This first angle θ is defined according to the location of the light module 21 in the light device 2 and according to the location of the external access to the first pinion 10. Thus, thanks to the flexible positioning of the first pinion 10 and the second pinion 11 relative to each other, it is possible to reach any position of the light module 21 in the light device 2, regardless of the location of the external access to the first pinion 10. In a non-limiting embodiment, the second axis of rotation B of the first pinion 10 and the third axis of rotation B' of the second pinion 11 are oriented away from the part containing the teeth.

[0072] The gear wheel is illustrated on the image in particular.

[0073] The first ring 120 and the second ring 121 have a circular shape.

[0074] In a non-limiting embodiment, the first toothed ring 120 has a second external diameter De2 larger than the third external diameter De3 of the second toothed ring 121. This allows the first torque M1 to be multiplied to obtain a second torque M4 larger than the first torque M1. Thus, the second torque M4 is such that it allows the light module 21 to be tilted. Consequently, the first torque M1 can be reduced to achieve the desired value for the second torque M4 by means of the assembly of the first pinion 10, gear 12, and second pinion 11. Note that an external diameter corresponds to that of the circle connecting the tips of the teeth.

[0075] In a non-limiting embodiment, the first toothed ring 120 is peripheral to the second toothed ring 121. That is, with respect to the axis of rotation A of the gear 12, it is further away than the second toothed ring 121. In other words, the first toothed ring 120 surrounds the second toothed ring 121. This allows it to cooperate with the first teeth 100 of the first pinion 10. In a non-limiting embodiment, the first toothed ring 120 and the second toothed ring 121 are concentric with respect to the axis of rotation A of the gear 12.

[0076] The first crown of teeth 120 comprises a greater number of teeth than the second crown of teeth 121. The distance l2 (illustrated on the) between two adjacent teeth of the first crown of teeth 120 is equal to the distance l3 (illustrated on the) between two adjacent teeth of the second crown of teeth 121 to allow the coupling between teeth 120 and 121.

[0077] The first ring of teeth 120 is configured to cooperate with the first pinion 10, in particular with the first teeth 100 of the first pinion 10. Thus, when the first pinion 10 is set in rotation by the first torque M1, the first teeth 100 drive in rotation the first ring of teeth 120 and consequently the whole gear 12.

[0078] The second toothed ring 121 is configured to cooperate with the second pinion 11, specifically with the second teeth 110 of the second pinion 11. Thus, when the toothed wheel 12 is rotated by the first pinion 10, the rotation allows the second torque M4 to be applied, via the second toothed ring 121, to the second pinion 11, which also begins to rotate. Its rotation tilts the light module 21.

[0079] In a non-limiting embodiment not shown, the first ring of teeth 120 and the second ring of teeth 121 are arranged at different depths, one depth being defined parallel to the first axis of rotation A of said gear 12. This allows for a very compact transmission module.

[0080] In order to reduce the first torque M1 while maintaining a sufficient second torque M4 applied to the second pinion 11 to tilt the light module 21, the reduction ratio i of the transmission module 1, also known in English as the "system gear ratio", must be less than 1. There is a relationship between the first torque M1 and the second torque M4, and the first angular velocity W1 and the fourth angular velocity W4, which is as follows: i = W4 / W1 = M4 / M1. In this case, we obtain M4 = M1 / i.

[0081] We also have i=(Z1xZ3) / (Z2xZ4) with Z1 (illustrated on the) the number of first teeth 100 of the first pinion 10, Z2 (illustrated on the) the number of teeth 1200 of the first ring of teeth 120, Z3 (illustrated on the) the number of teeth 1210 of the second ring of teeth 121 and Z4 (illustrated on the) the number of second teeth 110 of the second pinion 11.

[0082] In a non-limiting example, to obtain a multiplication of the first couple M1 by 3, namely to have M4=3xM1, in a non-limiting embodiment, the following values ​​are applied.

[0083] For the first pinion 10 as illustrated in the diagram: - Z1 = 11, where Z1 is the number of teeth (100) of the first pinion 10, - m1 = 1.3 mm, where m1 is the ratio between a first pitch diameter Dp1 and the number of teeth of the first pinion 10, - Dp1 = 14.3 mm, where Dp1 is the first pitch diameter, the first pitch diameter being the diameter of the circumference positioned at the midpoint of the teeth of the first pinion 10, - De1 = 16.7 mm, where De1 is the first external diameter, - Di1 = 10.5 mm, where Di1 is the first internal diameter, - α1 = 20°, where α1 is a first pressure angle which is the angle between a tooth face and a tangent to the first pinion 10, - β1 = 21.45°, where β1 is a first pitch angle which is the angle between the second axis rotation B of the first pinion 10 and of a point where the first pinion touches the first ring of teeth 120 for the transmission of motion.

[0084] The primitive diameter, well known to the man of the trade, corresponds to the diameter along which the teeth mesh.

[0085] For the second pinion 11 as illustrated in the figure: - Z4 = 15, where Z4 is the number of second teeth 110 of the second pinion 11, - m4 = 1.5 mm, where m4 is the ratio between a fourth pitch diameter Dp4 and the number of teeth of the second pinion 11, - Dp4 = 22.5 mm, where Dp4 is the fourth pitch diameter, - De4 = 25.3 mm, where De4 is the fourth external diameter, - Di4 = 18.3 mm, where Di4 is the fourth internal diameter, - α4 = 20°, where α4 is a fourth pressure angle which is the angle between a tooth face and a tangent to the second pinion 11, - β4 = 51.34°, where β4 is a fourth pitch angle which is the angle between the third axis of rotation B' of the second pinion 11 and a point where the second pinion 11 touches the second 121 tooth crown for motion transmission.

[0086] For the first set of teeth 120, as illustrated in the diagram: - Z2 = 28, where Z2 is the number of teeth (1200) in the first set of teeth 120, - m2 = 1.3 mm, where m2 is the ratio between a second pitch diameter Dp2 and the number of teeth in the first set of teeth 120, - Dp2 = 36.4 mm, where Dp2 is the second pitch diameter, - De2 = 38.8 mm, where De2 is the second external diameter, - Di2 = 32.6 mm, where Di2 is the second internal diameter, - α2 = 20°, where α2 is a second pressure angle, which is the angle between a tooth face and a tangent to the first set of teeth 120, - β2 = 68.55°, where β2 is a second pitch angle, which is the angle between the first axis of rotation A of the first set of teeth of 120 teeth and a point where the first ring of 120 teeth touches the first pinion 10 for the transmission of motion.

[0087] For the second tooth crown 121 as illustrated in the figure: - Z3 = 12, with Z3 being the number of teeth 1210 in the second tooth crown 121, - m3 = 1.5 mm, with m3 being the ratio between a third pitch diameter Dp3 and the number of teeth in the second tooth crown 121, - Dp3 = 18 mm, with Dp3 being the third pitch diameter, - De3 = 20.8 mm, with De3 being the third external diameter, - Di3 = 13.8 mm, with Di3 being the third internal diameter, - α3 = 20°, with α3 being a third pressure angle which is the angle between a tooth face and a tangent to the second tooth crown 121, - β3 = 38.66°, with β3 being a third pitch angle which is the angle between the first axis of rotation A of the second tooth crown 121 and from a point where the second ring of teeth 121 touches the second pinion 11 for the transmission of motion.

[0088] With these values, we have=(Z1xZ3) / (Z2xZ4)=(11x12) / (28x15)=132 / 420=0.314.

[0089] If the first torque M1 = 3 Nm (Newton meters), then M4 = M1 / i = 3 x (1 / 0.314) = 3 x (3.185) = 9.55. Thus, the second torque M4 is approximately equal to 9 Nm. We have therefore multiplied the first torque M1 by 3.

[0090] Laillustre schematically illustrates a lighting device 2 according to a non-limiting embodiment, the lighting device 2 comprising a single lighting module 21 and the transmission module 1.

[0091] As can be seen, the lighting device 2 also includes a housing 20.

[0092] The light module 21 is configured to be integrated into the housing 20.

[0093] The first pinion 10 is also configured to be integrated into the housing 20 while remaining free to move around its second axis of rotation B and is adapted to be adjusted by a manual or motorized tool O and thus be able to be rotated by the first torque M1. Its first end 10.1 protrudes from the housing 20 so that it can be accessed from the outside via an external access to the light device 2.

[0094] The toothed wheel 12 is also configured to be integrated into the housing 20 while being free to move around its first axis of rotation A so that it can be rotated by the first pinion 10.

[0095] The second pinion 11 is configured to cooperate with the light module 21 so as to set it in motion. The second pinion 11 is also integrated into the housing 20 while remaining free to move around its third axis of rotation B' so that it can be driven in rotation by the toothed wheel 12.

[0096] By free movement, we mean only rotational movement around the respective axis of the element considered.

[0097] Figure 1 illustrates a rear view of the lighting device 2 according to a non-limiting embodiment. In this non-limiting embodiment, the transmission module 1, in particular the second pinion 11, is configured to be connected to a worm gear 23, also shown in Figure 1. The worm gear is connected to a support (not shown) of the lighting module 21. When the second pinion 11 is rotated, it acts on the worm gear 23, which moves the support so as to tilt the lighting module 21.

[0098] La3 illustrates the housing 20 of the luminous device 2 without the transmission module 1. As can be seen in the figure, the housing 20 comprises: - a first location 200, - a second location 202, and - a third location 203.

[0099] The first location 200 is configured to accommodate the first pinion 10; the first location 200 is in the form of a longitudinal passage. The first location 200 opens onto an opening 201 configured to accommodate the first end 10.1 of the first pinion 10, which allows access to the first pinion 10 by a tool O from outside the light device 2. The first pinion 10 is thus held in the first location 200 and can simultaneously rotate within the first location 200. The first location 200 opens onto the second location 202.

[0100] The second location 202 is configured to accommodate the gear 12, the second location 202 being cylindrical in shape. The gear 12 is thus held in the second location 202 and can simultaneously rotate within it. The second location 202 opens onto the third location 203.

[0101] The third position 203 is configured to accommodate the second pinion 11, the third position 203 being in the form of a longitudinal passage. The second pinion 11 is thus held in the third position 203 and can simultaneously rotate within the third position 203.

[0102] Of course, the description of the invention is not limited to the embodiments and scope described above. Thus, in another non-limiting embodiment, the lighting device 2 may comprise a plurality of lighting modules 21 with several transmission modules 1, one per lighting module 21. In yet another non-limiting embodiment, the lighting device 2 may comprise a plurality of lighting modules 21 with a single transmission module 1, which in this case comprises a single first pinion 10, a single gear 12, and several second pinions 11, each respectively linked to a lighting module 21. In yet another non-limiting embodiment, a combination of the two preceding embodiments may be used. In one non-limiting example, it comprises two lighting modules 21.In another, non-limiting embodiment, the second pinion 11 is directly connected to the light module 21 so as to tilt it. In this case, there is no intermediate worm gear.

[0103] Thus, the described invention has the following advantages in particular: - it allows the first torque M1 which is applied at the input of the transmission module 1 to be reduced, and this in a location with limited space; thus the effort to tilt the luminous module(s) 21 in the luminous device 2 is reduced;- it allows the first torque M1 to be multiplied to obtain a second, larger torque M4, the value of which corresponds to the desired torque for tilting the light module(s) 21, - it allows adaptation to different locations of a light module 21 in a light device 2 and to different locations of an external access accessible by a tool O, locations which often depend on a design of the car manufacturer in the case of the automotive application, - it allows the possibility of having a compact transmission module 1 which can thus address space problems in the housing 20 of the light device 2, - it allows the transmission of the rotational movement from one location in the housing 20 of the light device 2 to another location in the housing 20 of the light device 2 so as to tilt the light module(s) 21 of the light device 2.;

Claims

Transmission module (1) of a rotation comprising: - a first pinion (10) having a first diameter, - a toothed wheel (12) with a first ring of teeth (120), the first ring having a second diameter, and a second ring of teeth (121), the second ring having another third diameter different from the second diameter, said toothed wheel (12) having a first axis of rotation (A), - a second pinion (11) having a fourth diameter, - said first pinion (10) being configured to cooperate with said first ring of teeth (120) of the toothed wheel (12) and said second pinion (11) being configured to cooperate with said second ring of teeth (121) of the toothed wheel so as to transmit said rotation of said first pinion (10) to said second pinion (11). Transmission module (1) according to claim 1, in which said first ring of teeth (120) has an external diameter (De2) greater than that (De3) of said second ring of teeth (121). Transmission module (1) according to any one of the preceding claims, wherein said first ring of teeth (120) is peripheral to said second ring of teeth (121). Transmission module (1) according to any one of the preceding claims, wherein said second pinion (11) has an external diameter (De4) greater than that (De1) of said first pinion (10). Transmission module (1) according to any one of the preceding claims, in which said first pinion (10) and said second pinion (11) are arranged with respect to each other at an angle (θ) between 75° and 180°. Transmission module (1) according to any one of the preceding claims, wherein said first pinion (10) and said second pinion (11) are conical so as to have axes of rotation (B, B') not parallel with the axis of rotation (A) of said gear (12). Transmission module (1) according to any one of the preceding claims, wherein said first ring of teeth (120) and said second ring of teeth (121) are arranged at different depths, one depth being defined parallel to the first axis of rotation (A) of said gear (12). Transmission module (1) according to any one of the preceding claims, wherein said transmission module (1) has a gear ratio (i) which is less than 1. Light device (2) for vehicle (3) comprising: - a housing (20), - at least one light module (21) integrated in said housing (20), characterized in that the light device (2) further comprises: - a transmission module (1) according to any one of the preceding claims, said first pinion (10) being integrated in said housing (20) and free to move and being adapted to be adjusted by a tool (O), said toothed wheel (12) being integrated in said housing (20) and free to move, said second pinion (11) being integrated in said housing (20) and free to move and configured to cooperate with said light module (21) so as to set it in motion. Light device (2) according to claim 9, wherein the second pinion (11) has a third end (11.1) configured to be connected directly or indirectly to at least one light module (21). Light device (2) according to claim 10, wherein the third end (11.1) is configured to be connected to a worm screw (23), the worm screw (23) being configured to be connected to at least one light module (21). Light device (2) according to any one of claims 9 to 11, in which the housing comprises: - a first location (200) configured to accommodate the first pinion (10); - a second location (202) configured to accommodate the toothed wheel (12); and - a third location (203) configured to accommodate the second pinion (11). Light device (2) according to claim 12, wherein the first location (200) opens onto the second location (202), and the second location (202) opens onto the third location (203). Light device (2) according to any one of claims 12 or 13, wherein the first location (200) is in the form of a longitudinal passage, the second location (202) is cylindrical in shape, and the third location (203) is in the form of a longitudinal passage.

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