Sealing plug for a support-engagement play-compensating carrier of a gear housing
阅读说明:本技术 用于减速器壳体的支承啮合游隙补偿支架的密封插塞 (Sealing plug for a support-engagement play-compensating carrier of a gear housing ) 是由 米克·盖琳 于 2018-05-25 设计创作,主要内容包括:本发明涉及一种用于封闭壳体(3)的孔口(2)的插塞(1),所述插塞(1)包括具有中心轴线(XX’)的实心毂(10),以及保持构件(11),所述保持构件确保所述插塞(1)在孔口(2)中的轴向附接,所述插塞包括:间隙补偿支架(12),其不同于毂(10)并且可移动地安装在由毂(10)承载的引导支撑件(13)上,所述引导支撑件(13)布置成以便轴向地保持所述支架(12)并沿着横向于中心轴线(XX’)的被称为“间隙补偿方向”(ZZ’)的方向引导所述支架(12)的相对于所述毂(10)的相对移动;弹簧式弹性构件(16),其布置在引导支撑件(13)和支架(12)之间;以及定向构件(17),其布置成沿着相对于壳体(3)的预定取向,在围绕中心轴线(XX’)的方位角上,使插塞(1)定向并且由此使由引导支撑件(13)限定的间隙补偿方向(ZZ’)定向。(The invention relates to a plug (1) for closing an orifice (2) of a housing (3), the plug (1) comprising a solid hub (10) having a central axis (XX'), and a retaining member (11) ensuring the axial attachment of the plug (1) in the orifice (2), the plug comprising: a clearance compensation carriage (12) distinct from the hub (10) and movably mounted on a guide support (13) carried by the hub (10), said guide support (13) being arranged so as to axially retain said carriage (12) and guide the relative movement of said carriage (12) with respect to said hub (10) along a direction transverse to the central axis (XX ') referred to as the "clearance compensation direction" (ZZ'); a spring-type elastic member (16) disposed between the guide support (13) and the bracket (12); and an orientation member (17) arranged to orient the plug (1) and thus the play compensation direction (ZZ ') defined by the guide support (13) in a predetermined orientation with respect to the housing (3), in an azimuth angle around the central axis (XX').)
1. Plug (1) intended to close an orifice (2) of a housing (3), the plug (1) comprising: a solid hub (10) having a central axis (XX') arranged to plug an aperture (2) of the housing; and a retaining member (11) fixed to the hub (10) and arranged to cooperate with the housing (3) so as to ensure the axial fastening of the plug (1) in the aperture (2) of the housing, the plug being characterized in that it comprises:
a gap-adjusting carriage (12) distinct from the hub (10) and movably mounted on a guide support (13) carried by the hub (10), the guide support (13) being arranged to axially retain the carriage (12) and guide a relative displacement of the carriage (12) with respect to the hub (10) along a direction transverse to the central axis (XX ') referred to as the "gap-adjusting direction" (ZZ'),
a spring-like elastic member (16) interposed between the guide support (13) and the bracket (12) so as to elastically urge the bracket (12) to displace along the gap adjustment direction (ZZ'),
an orientation member (17) arranged to be able to cooperate with a matching orientation member (18) provided in the housing (3) so as to orient the plug (1) and thereby the gap adjustment direction defined by the guide support (13) in an azimuth angle about the central axis (XX') along a predetermined orientation with respect to the housing (3).
2. Plug as claimed in claim 1, characterized in that the guide support (13) is integrally formed in one piece with the hub (10), preferably by moulding.
3. Plug according to claim 1 or 2, characterized in that the guiding support (13) forms a male projection (20) that protrudes axially on a face of the hub (10) called "inner face" (10I) that forms a base of the hub (10) intended to be oriented axially towards the interior of the housing (3), the male projection (20) having, in a section orthogonal to the gap adjustment direction (ZZ '), a hook-like shape, preferably a dovetail-like or "T" -like shape, cooperating with a female slot (21) having a matching shape drilled in the cradle (12) to guide the cradle (12) in translation along the gap adjustment direction (ZZ').
4. Plug according to any one of claims 1 to 3, characterised in that the orientation member (17), preferably in the form of an axial rib, is integrally formed in one piece with the hub (10) and/or with the guide support (13).
5. Plug according to any one of the preceding claims, characterised in that the guide support (13) has a receiving aperture (22) drilled in the gap adjustment direction (ZZ') to receive the elastic member (16), preferably formed by a helical spring.
6. Plug according to any one of the preceding claims, characterised in that the hub (10) has an inner face (10I) intended to be oriented axially towards the interior of the housing (3) and located opposite the cradle (12), and in that the inner face (10I) is provided with at least one lug (23), and preferably two lugs (23), intended to retain the cradle (12) on the guiding support (13) so as to prevent the cradle (12) from accidentally coming out of the guiding support (13) along the gap adjustment direction (ZZ') during the manoeuvring of the plug (1) out of the housing (3) or the mounting of the plug on the housing (3).
7. Plug according to any one of the preceding claims, characterised in that the cradle (12) is formed by a portion of a cylinder oriented according to a central axis (XX ') and comprising, on a face (12E), guide slots (21) intended to cooperate with guide supports (13) of the hub (10) to axially retain the cradle (12) on the hub (10) while enabling the cradle (12) to slide along a gap adjustment direction (ZZ'), and, on an axially opposite face (12I), a bearing housing (14) arranged to house bearings (15), such as roller bearings, intended to support and guide in rotation a worm (6) housed inside the casing (3).
8. Plug according to any one of the preceding claims, characterized in that the outer periphery of the bracket (12) is provided with a damping pad (26) made of elastomer, preferably having a slit annular shape, intended to cooperate with the inner wall of the orifice (2) to avoid or attenuate the impact of the bracket (12) on the housing (3).
9. Plug according to any one of the preceding claims, characterized in that the hub (10) is provided with a sealing gasket (30), preferably an O-ring gasket, intended to ensure a bond between the hub (10) and the wall of the orifice (2), said bond being sealed at least against liquid water.
10. A plug element (10B) intended to be part of a plug (1) of a housing (3), the plug element comprises a hub (10), preferably made of thermoplastic material, having a central axis (XX'), on the face (10I) of the hub there is formed a projecting guide support (13) formed integrally in one piece with the hub (10), which forms a guide rail having a hook-shaped cross section, for example a "T" or dovetail shape, said guide rail being intended to hold and guide the bracket (12), and the guide track is oriented along a direction transverse to the central axis (XX ') called "gap adjustment direction" (ZZ'), the guide support (13) also carries orientation members (17), such as axial ribs, thereby allowing to define an azimuthal orientation of the gap adjustment direction with respect to the central axis (XX').
11. A reducer being a mechanism (4) comprising a worm wheel (5) and a worm (6), said mechanism being housed in a housing (3) closed off by a plug (1) according to any one of claims 1 to 9, the hub (10) of the plug being coaxial with the axis of rotation of the worm (6), and the clearance-adjustment bracket (12) of the plug being arranged to press the worm (6) against the worm wheel (5).
Technical Field
The present invention relates to the arrangement of a housing intended to protect a mechanism, and in particular a gear mechanism (such as a gear reducer), and more particularly a gear reducer intended for a power steering system of a vehicle.
Background
Such housings typically include one or several access apertures through the wall of the housing to enable introduction and assembly of all or part of the mechanism into the housing.
These access orifices must be plugged by means of a plug in order to prevent the intrusion of water or foreign bodies inside the casing, or the loss of lubricant, and thus to ensure the sustainable proper operation of the mechanism protected by the casing.
Furthermore, it is also known to provide backlash compensation devices ("anti-backlash systems") in the gear mechanism, which press the teeth of the gear elements against each other.
The known backlash compensation device effectively limits the meshing noise and is adapted to compensate for wear of the mechanism and the effects of temperature or humidity variations.
However, known clearance compensation devices have some complexity, and in this regard may include a large number of parts and/or require complex machining of the housing, which tends to complicate manufacturing and assembly operations and increase the implementation costs of such devices.
Furthermore, the plug (which must remain in a fixed and sealed position on the housing) must be mechanically separated from the clearance compensation mechanism (which necessarily comprises a part mounted movably with respect to the housing), and it should not interfere with said plug, in order to avoid any risk of failure, in particular of blocking said movable part or of accidentally discharging the plug.
Of course, here again, this requirement tends to increase the overall volume of the casing and to complicate the assembly operations, thereby compromising the manufacturing costs.
Disclosure of Invention
The object specified by the present invention is therefore to overcome the aforementioned drawbacks and to propose a new housing arrangement, the assembly of which is simple and quick and which allows to combine the sealing and backlash compensation functions in a compact manner and at a lower cost.
The object specified by the invention is achieved by means of a plug intended to close an orifice of a housing, said plug comprising: a solid hub having a central axis (XX') arranged to plug the aperture of the housing; and a retaining member secured to the hub and arranged to cooperate with the housing so as to ensure axial fastening of the plug in the aperture of the housing, wherein the plug comprises:
a gap-adjusting carriage distinct from the hub and movably mounted on a guide support carried by the hub, the guide support being arranged to axially retain the carriage and guide relative displacement of the carriage with respect to the hub in a direction transverse to the central axis (XX '), referred to as the "gap-adjusting direction" (ZZ'),
a spring-type elastic member interposed between the guide support and the bracket so as to elastically urge the bracket to displace along a gap adjustment direction (ZZ'),
an orientation member arranged to be able to cooperate with a matching orientation member provided in the housing so as to orient the plug and thereby the gap adjustment direction defined by the guide support in an azimuth angle about the central axis (XX') in a predetermined orientation relative to the housing.
Advantageously, the invention allows to combine, in the same sub-device that forms the plug, a hub that ensures the sealed closure of the casing, a movable and elastically biased bracket that ensures the backlash adjustment of the mechanism housed in the casing, and an orientation member that forms a mistake-proofing device that allows to define immediately during the assembly of the plug on the casing the correct orientation of the bracket along the backlash adjustment direction in which it should be displaced.
Thus, all functions for sealing the bung and gap adjustment are grouped together in the same sub-device, which is compact, easy and fast to mount on the housing in one single operation.
Drawings
Other objects, features and advantages of the present invention will appear in more detail on reading the following description and on using the accompanying drawings, which are provided for purely indicative and non-limiting purposes, and in which:
fig. 1 and 2 show an embodiment of a plug according to the invention in a housing accommodating a worm gear and worm reducer mechanism in a top perspective exploded view and a bottom perspective exploded view, respectively.
Fig. 3 is an assembled view of the device of fig. 1 and 2, viewed in side longitudinal section.
Fig. 4 is a longitudinal sectional view of the device of fig. 3, viewed from the bottom.
Figure 5 shows a variant of a plug according to the invention comprising a hub formed by an assembly of two nested plug elements.
Fig. 6 is a perspective view of a housing portion showing an orifice arrangement adapted to receive a plug according to the present invention.
Fig. 7 and 8 show the plug element of fig. 5 provided with a guide support according to a front and rear perspective view.
Detailed Description
The invention relates to a plug 1 intended to close an
The
Preferably, the
According to a preferred application variant, the
More specifically, the
The
The plug 1 comprises a
The plug 1 further comprises a
Preferably, the
Therefore, the plug 1 can be easily fastened to the
Moreover, this solution allows to push the plug 1 into the
That is, the plug 1 may be fastened to the
According to the invention, the plug 1 comprises a clearance-
The invention thus allows to combine a seal-plugging member and a gap-setting member within the same plug 1.
The
Thus, when the plug 1 is in place in the
The
More preferably, said
Preferably, said gap adjustment direction (ZZ ') is substantially perpendicular to the central axis (XX '), that is to say it forms an angle with said central axis (XX ') equal to 90 degrees +/-3 degrees or +/-5 degrees.
This direction corresponds to the direction of backlash adjustment along which the position and/or the axial spacing of the tooth elements of the gear mechanism 4 (here more specifically the axial spacing between the
More preferably, the plug 1 will be placed so that the central axis (XX ') coincides with the nominal rotation axis of the
Hereinafter, for the convenience of description, it will be considered that the plug 1 is coaxial with the
"axial" is understood to mean a direction parallel to and even coincident with the axis under consideration (by default the central axis (XX')), whereas "radial" is a direction perpendicular to said axis under consideration.
Preferably, as shown in figures 2, 3 and 4, the carriage comprises a bearing
In a particularly preferred manner, the
According to the invention, the plug also comprises a spring-type (and more preferably a coil-spring-type)
The direction of action of the
The
Thus, in summary, the gap adjustment means 7 comprises at least one
According to the invention, the plug 1 further comprises an
Preferably, the
Such orientation means 17 thus form a mistake-proofing device which allows to index the gap adjustment direction (ZZ') materialized by the
In summary, advantageously, the invention thus allows to directly embed the clearance adjustment means 7 on the plug 1 in a single and compact sub-device, which can advantageously be handled as a unit and which, by axial approach along the central axis (XX'), is integrally engaged in the
The invention thus simplifies the simultaneous assembly of all sealing obturating and gap adjusting functions by a simple assembly of the plug 1, which forms a mechanical sub-device combining all these functions (sealing obturating, gap adjusting, orientation of the gap adjusting).
Preferably, the
This allows a simple and fast manufacturing, as well as a secure fastening of the
More preferably, the
In particular, the thermoplastic material may be selected from: polybutylene terephthalate (PBT), polyamide (PA66), polyphthalamide (PPA 66).
Advantageously, the thermoplastic material may be incorporated into the material reinforcing fibers (e.g. glass fibers), preferably in an amount of 30 to 50% by weight.
Preferably, a
Said inner face 10I forms the base of said hub, which is preferably substantially perpendicular to the central axis (XX'), and is intended to be axially oriented towards the inside of the
As shown in fig. 1, 2, 4, 5, 7 and 8, the
Preferably, the hook shape is in the form of a dovetail or, as shown in the previous figures, a "T" shape.
The
The hook-like shape of the
The hook-like shape further forms a kind of track which provides a strong and accurate sliding guidance of the
Preferably, the orienting member 17 (preferably in the form of an axial rib) is integrally formed in a single piece with the
To facilitate the manufacture of the plug 1 and the choice of the orientation of the
More preferably, the orienting
Preferably, as shown in particular in fig. 2, 3 and 4, the
As mentioned above, the
Therefore, the
Furthermore, by substantially centering the receiving
According to a preferred feature that can constitute the invention independently (in particular independently of the presence or absence of the orienting
The presence of
As shown in fig. 7, the
Along the gap adjustment direction (ZZ'), said
Along the gap adjustment direction (ZZ'), said lugs 23 are sufficiently axially distanced from the
However, along the gap adjustment direction (ZZ '), said
Thus, as long as the plug 1 is not yet in the
Preferably, the lug(s) 23 are arranged to retain the
Thus, when the plug 1 is moved out of the
This elastic retention of the
When the plug 1 is set in position in the
Furthermore, it should be noted that the lug may form an anti-return pawl able to insert the
Alternatively or complementarily, the
Furthermore, it should be noted that the two
In fact, said channel spacer 24 allows to leave a channel for the moulded core that engages against the inner face 10I of the hub along the gap adjustment direction (ZZ') to form said receiving
According to a preferred feature which may independently constitute the invention, as shown in particular in fig. 1 and 2, the
Said cylindrical portion comprises a guide slot 21 on a
The cylindrical portion also comprises, on an axially opposite face 12I (which here is an inner face 12I located towards the interior of the
The
The cylindrical portion forming the
Preferably, said
Advantageously, by forming the
However, the angular coverage of the bearing
Advantageously, the bearing
Preferably, the (radially outer) periphery of the
Preferably, the damping
Preferably, the damping
Preferably, said damping
Advantageously, this damping
Furthermore, the
Preferably, the sealing
Preferably, it may be in the form of an O-
Alternatively, it is still possible to make the sealing
The plug 1, and more particularly the sealing
The plug 1 also ensures sealing against the lubricant (such as grease or oil) used by the
Furthermore, according to a preferred variant, the plug 1, and more particularly the
In particular, such an arrangement allows avoiding connection defects and therefore sealing defects at the surface of the groove and therefore between the O-
Preferably, said portions 10A, 10B constituting the
Nesting can be achieved by providing on one of the discs 10A, 10B a
The invention can therefore also cover a plug element 10B (here a disc 10B) intended to be part of the plug 1 of the
Such a plug element 10B is intended to be fastened, preferably by nesting, to another plug element 10A having a complementary shape, in order to reconstitute the
The
The device thus formed can then be attached to the
Of course, the invention covers any device comprising a
In particular, therefore, the invention relates to a reducer which is a
Of course, the present invention relates to a power steering system comprising a steering housing 3 (and more specifically a
Of course, the invention is not limited to the variants described above, the person skilled in the art being particularly able to freely separate or combine any of the features described above together, or replace them with equivalents.
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