JP2005069379A - Rotary shaft member supported device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rotary shaft member supported device of which the shim is not misaligned or does not fall when the rotary shaft member is assembled. <P>SOLUTION: The shim 50 is provided with an interposed part 52 interposed between an outer ring 38s of the second bearing 38 and stepped face 46 and simultaneously, in addition to it, is provided with an alignment part 54 aligning with respect to axial end of the second case member 14 side of first counter gear shaft 26 penetrating an inner ring 38u of the second bearing 38 in case of installing on the outer ring 38s of the second bearing 38 at the time of being incorporated by being integrally provided on inner peripheral side of the interposed part 52. Thus, there is no chance that the shim 50 is misaligned or falls when the shim 50 is installed on the outer ring 38s of the second bearing 38 of the first counter gear shaft 26 stood on the first case member 12 in case of incorporating the rotary shaft member supported device because the shim 50 is aligned with the first counter gear shaft 26 by the alignment part 54 of the shim 50. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention supports a rotary shaft member rotatably in a housing composed of a first case member and a second case member via the first bearing and the second bearing by the first case member and the second case member, respectively. The present invention relates to a rotating shaft member support device.

  A housing configured by combining the first case member and the second case member so that the openings of the first case member and the second case member are opposed to each other; and the first case member and the second case member in the housing. A rotating shaft member that is rotatably supported via a first bearing and a second bearing, and the second case has a small diameter hole and a large diameter concentric with the small diameter hole and larger in diameter than the small diameter hole. A stepped hole comprising a hole is formed, and the outer ring of the second bearing is fitted into the large diameter hole and is brought into contact with a stepped surface between the large diameter hole and the small diameter hole via a shim. In addition, there is known a rotary shaft member support device of a type in which the end portion on the second case member side of the rotary shaft member protrudes through the inner ring of the second bearing. For example, it is a part of a vehicle power transmission device as described in Patent Document 1.

JP-A-9-226392

  When assembling the rotary shaft member support device as described above, one case member constituting the housing, for example, the first case member is placed with the opening facing upward, and then formed in the first case member. The rotary shaft member is erected by fitting the end portion of the rotary shaft member on the first case member via the first bearing into the fitting hole, and then the second case member side end of the rotary shaft member. In the state where the second bearing is fitted to the upper part, that is, the upper end, the second case member with the opening facing downward is lowered from above, and the second bearing is provided on the second case member in the descending process. While being fitted into the large-diameter hole, the opening of the second case member is combined with the opening of the first case member and fastened with a bolt or the like.

  By the way, the shim is an annular plate material selected from a plurality of types of thickness dimensions for filling a gap in a predetermined thrust direction in the first bearing and the second bearing that rotatably support the rotating shaft member, Since it is configured with the same radial dimension as the outer ring so as not to interfere with the inner ring of the second bearing, the shim cannot be centered simply by being mounted on the second bearing, At this time, it is attached with grease or the like in a state of being fitted in a large-diameter hole provided in the second case member in advance. For this reason, when the second case member is inverted so that the opening faces downward during the assembly, the shim may be displaced or dropped, which may cause the assembly operation to be impossible or the parts to be broken. Moreover, if it is fixed to the second case member by some method so as not to fall, there is a disadvantage that the shape becomes complicated.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a rotating shaft member support device in which shims are not displaced or dropped when the rotating shaft member is assembled.

  In order to achieve this object, the gist of the present invention is that a housing configured by combining a first case member and a second case member so that their openings are closed with each other facing each other, A rotation shaft member rotatably supported by the first case member and the second case member via a first bearing and a second bearing in the housing is provided, and the second case member has a small-diameter hole and A stepped hole comprising a large diameter hole concentric with the small diameter hole and having a larger diameter than the small diameter hole is formed, and an outer ring of the second bearing is fitted into the large diameter hole and is connected to the large diameter via a shim. A rotary shaft member support device of a type that is brought into contact with a stepped surface between a diameter hole and the small diameter hole, and an end portion on the second case member side of the rotary shaft member protrudes through an inner ring of the second bearing. The shim has the stepped outer ring and the stepped bearing. A sandwiched portion that is sandwiched between the rotating shaft member and the rotary shaft member that is provided integrally with the sandwiched portion and passes through the second bearing when mounted on the outer ring of the second bearing during assembly. And a centering portion that performs centering with respect to the end portion on the second case member side.

  According to this configuration, the shim includes the sandwiched portion that is sandwiched between the outer ring of the second bearing and the stepped surface, and in addition to that, the shim is provided integrally with the sandwiched portion. A centering portion for centering the second case member side end portion of the rotary shaft member penetrating through the second bearing when mounted on the outer ring of the second bearing during attachment; When assembling the rotating shaft member support device, when the shim is placed on the second bearing fitted to the second case member side end of the rotating shaft member erected on the first case member, the shim Since the shim is centered with respect to the rotating shaft member by the centering portion, the shim is not displaced or dropped, and it is necessary to paste the shim into the large-diameter hole of the second case member in advance with grease or the like. There is a risk that assembly work will not be possible or parts may be broken. It is erased.

  Here, preferably, the shim is provided integrally with an annular outer peripheral portion as the sandwiched portion and an inner peripheral side of the outer peripheral portion, and an end portion on the second case member side of the rotating shaft member. And an inner peripheral portion having a positioning hole having a diameter slightly larger than the diameter. This simplifies the shim structure. Preferably, a plurality of oil holes for easily penetrating the lubricating oil are provided in the inner peripheral portion thereof.

Preferably, the second case member side end of the rotating shaft member is allowed to penetrate the inner peripheral ring of the second bearing and be received in the small diameter hole,
The diameter of the positioning hole of the shim is D1, the outer diameter of the shim is D2, the thickness of the inner peripheral portion of the shim is t, the diameter of the second case member side end of the rotating shaft member is d, and the diameter of the small-diameter hole is When the diameter is D3 and the inclination angle of the shim fitted to the end of the rotating shaft member on the second case member is θ, the following expressions (1) and (2) are satisfied. In this way, even if the shim fitting operation varies and is inclined, there is an advantage that the shim has an angle at which it cannot be fitted into the small diameter hole.
t · tan θ = D1−d / cos θ (1)
D3 <D2cos θ (2)

  Preferably, the surface of the inner peripheral portion of the shim facing the inner ring of the second bearing is deformed to the second housing side relative to the outer peripheral portion of the shim in order to avoid interference with the inner ring. It is what has been. In this way, interference between the shim and the inner ring of the second bearing is preferably prevented.

  Preferably, the inner peripheral portion of the shim has a smaller thickness than the outer peripheral portion of the shim, and the shim has a target cross-sectional shape with respect to the center line in the thickness direction. In this way, the front and back of the shim are eliminated, erroneous work is prevented, and work is facilitated.

  FIG. 1 and FIG. 2 are main parts of a vehicle power transmission device 10 to which a rotating shaft support device of the present invention is applied, and show a diagram showing an assembly process and an assembly completion state, respectively. The vehicle power transmission device 10 is suitably used for, for example, a hybrid vehicle, and is configured such that the first case member 12 and the second case member 14 are blocked with each other with their openings facing each other. A housing 16 configured by combining them is provided. When the housing 16 is assembled, as shown in FIG. 1, the first case member 12 is placed on an assembly table (not shown) so that the opening faces upward, and a suspension device (not shown) so that the opening faces downward. The second case member 14 is lowered in this state, and the housing 16 is assembled.

  The first case member 12 includes a planetary gear that includes a first motor generator 18, a sun gear connected to the first motor generator 18, a carrier connected to an engine (not shown), and a ring gear connected to the first sprocket 20. A gear device 22, a first counter gear shaft (rotary shaft member) 26 operatively connected via the first sprocket 20 and the transmission chain 24, and a second counter gear shaft meshing with the first counter gear shaft 26 28 and a differential gear device 30 that meshes with the second counter gear shaft 28 are assembled in advance through bearings so as to be rotatable around mutually parallel axes. The first counter gear shaft 26, the second counter gear shaft 28, and the differential gear device 30 are fitted with bearings at both ends in the axial direction thereof, and the bearing on the first case member 12 side is the first bearing. The first case member 12 is erected by being fitted into a fitting hole provided in the case member 12. The bearings on the second case member 14 side of the first counter gear shaft 26, the second counter gear shaft 28, and the differential gear device 30 are in the second case member 14 when the second case member 14 is lowered. It can be inserted into a fitting hole provided in.

  As shown in detail in FIG. 2, for example, the first counter gear shaft 26 is integrally provided with a second sprocket 32 around which the transmission chain 24 is wound and a gear 34 for meshing with the second counter gear shaft 28. A first bearing 36 is fitted on the shaft end on the first case member 12 side, and a second bearing 38 is fitted on the shaft end on the second case member 14 side. The end portion on the second case member 14 side of the first counter gear shaft 26 protrudes through the inner ring 38 u of the second bearing 38. The first counter gear shaft 26 has a circular tube shape, and a projection 48 protruding from the second case member 14 for guiding the flow of lubricating oil has a second case member 14 of the first counter gear shaft 26. It is inserted in the central hole on the side.

  The fitting hole 40 provided in the second case member 14 so that the second bearing 38 is fitted when the second case member 14 is lowered is concentric with the small diameter hole 42 and the small diameter hole 42. The stepped hole is composed of a large diameter hole 44 having a larger diameter than the small diameter hole 42. When the assembly is completed, the outer ring 38s of the second bearing 38 is fitted into the large-diameter hole 44, and the large-diameter hole 44 is connected to the large-diameter hole 44 via the shim 50 placed on the second bearing 38 before the assembly. It is made to contact | abut to the stepped surface 46 between the small diameter holes 42. FIG. In the present embodiment, the first case member 12 and the second case member 14 and the first bearing 36 and the second bearing 38 fitted to the first case member 12 and the second case member 14 support the first counter gear shaft 26 rotatably. It corresponds to a rotating shaft member support device.

  As shown in detail in FIGS. 3 and 4, the shim 50 has an annular plate shape, and an outer peripheral portion that is sandwiched or pressed between the outer ring 38 s of the second bearing 38 and the stepped surface 46, that is, a sandwiched portion. Portion 52 and a first counter gear shaft that is integrally provided on the inner peripheral side of the sandwiched portion 52 and passes through the second bearing 38 when mounted on the outer ring 38s of the second bearing 38 during assembly. 26, a centering portion 54 which is an inner peripheral portion for centering the shaft end portion on the second case member 14 side. The centering portion 54 is slightly larger than the outer diameter of the first case member 12 and the second case member in order to center the second counter member shaft side end portion of the first counter gear shaft 26. 14 is combined with a positioning hole having a diameter that does not interfere with the counter shaft 26, that is, the center hole 56, and the inner ring 38u of the second bearing 38 to avoid buffering between the outer periphery of the shim 50 A thickness smaller than that of the portion 52 and a plurality (eight in the present embodiment) of through-holes 58 for preventing the movement of the lubricating oil are provided. The shim 50 has a target cross-sectional shape with respect to the center line C in the thickness direction.

  As shown in FIG. 5, in the shim 50, the diameter of the center hole 56 that functions as a positioning hole of the shim 50 is D1, the outer diameter of the shim 50, that is, the outer diameter of the sandwiched portion 52 is D2, and the shim The thickness of the inner peripheral portion 50, that is, the centering portion 54 is t, the diameter of the shaft end portion on the second case member 14 side of the first counter gear shaft 26 is d, the inner diameter of the small diameter hole 42 is D3, and the first counter gear. When the inclination angle of the shim 50 when the shaft 26 is fitted to the shaft end portion on the second case member 14 side is θ, the diameter D1 of the center hole 56 is satisfied so that the following expressions (1) and (2) are satisfied. The outer diameter D2 of the sandwiched portion 52, the thickness t of the centering portion 54, the diameter d of the shaft end portion on the second case member 14 side of the first counter gear shaft 26, and the inner diameter D3 of the small diameter hole 42 are set and formed. ing.

t · tan θ = D1−d / cos θ (1)
D3 <D2cos θ (2)

  The shim 50 is prepared in advance so that the sandwiching portion 52 has a plurality of types of thickness, and the most suitable thickness is selected and used. For example, the height H1 from the combination surface F1 of the first case member 12 to the outer ring 38s of the second bearing 38 is measured, and the height H2 from the combination surface F1 to the stepped surface 46 of the second case member 14 is measured. The shim 50 measured and corresponding to the height difference ΔH (= H2−H1) is selected and used. Usually, a shim 50 having a thickness that is the same as ΔH or slightly smaller than ΔH is selected.

  In the vehicle power transmission device 10 configured as described above, the shim 50 includes the sandwiched portion 52 that is sandwiched between the outer ring 38s of the second bearing 38 and the stepped surface 46, and in addition, The first counter gear shaft 26 that is integrally provided on the inner peripheral side of the sandwiched portion 52 and passes through the inner ring 38u of the second bearing 38 when mounted on the outer ring 38s of the second bearing 38 during assembly. Since the centering portion 54 for centering the shaft end portion on the second case member 14 side is provided, the first counter erected on the first case member 12 when the rotating shaft member support device is assembled. When the shim 50 is placed on the outer ring 38 s of the second bearing 38 that is fitted to the shaft portion on the second case member 14 side of the gear shaft 26, the shim 50 is first caused by the centering portion 54 of the shim 50. The counter gear shaft 26 is centered. The shim 50 will not be displaced or dropped, and it is no longer necessary to attach the shim 50 in advance to the large-diameter hole 44 of the second case member 14 with grease or the like. The risk of breakage is eliminated.

  In this embodiment, the shim 50 is integrally provided on the inner peripheral side of the sandwiched portion 52 and the sandwiched portion 52 that is an annular outer peripheral portion, and the second case of the first counter gear shaft 26. Since the centering portion 54 having the center hole (positioning hole) 56 having a diameter D1 slightly larger than the diameter d of the member 14 side shaft end portion is provided, the structure of the shim 50 is simplified. Further, the centering portion 54 is provided with a plurality of through holes (oil holes) 58 for allowing the lubricating oil to easily pass therethrough, so that the circulation of the lubricating oil is ensured.

  In the present embodiment, the second case member 14 side shaft end portion of the first counter gear shaft 26 passes through the inner peripheral ring 38u of the second bearing 38 and is received in the small diameter hole 42. The inner diameter of the positioning center hole 56 of the shim 50 is D1, the outer diameter of the shim 50 is D2, the thickness of the centering portion 54 that is the inner peripheral portion of the shim 50 is t, and the second case member side end of the rotating shaft member Where d is the diameter of the small-diameter hole, D3 is the diameter of the small-diameter hole, and θ is the inclination angle of the shim 50 fitted to the second case member 14 side shaft end of the first counter gear shaft 26. Since (2) is satisfied, even if the fitting operation of the shim 50 varies and is inclined at the time of assembly, the angle at which the shim 50 cannot be fitted into the small diameter hole 42 is obtained. There are advantages.

  In the present embodiment, the surface of the inner peripheral portion of the shim 50 facing the inner ring 38u of the second bearing 38, that is, the surface of the centering portion 54 on the second bearing 38 side is to avoid interference with the inner ring 38u. Since the shim 50 is deformed toward the second case member 14 with respect to the sandwiched portion (outer peripheral portion) 52, interference between the shim 50 and the inner ring 38u of the second bearing 38 is suitably prevented.

  Further, in this embodiment, the centering portion 54 that is the inner peripheral portion of the shim 50 has a smaller thickness than the sandwiched portion 52 that is the outer peripheral portion of the shim 50, and the shim 50 has a center line C in the thickness direction. On the other hand, since it has a target cross-sectional shape, the front and back sides of the shim 50 are eliminated, erroneous work is prevented, work reliability is improved, work is facilitated, and work efficiency is increased. .

  Next, another embodiment of the present invention will be described. In the following description, parts common to those in the above-described embodiment are denoted by the same reference numerals and description thereof is omitted.

  FIG. 6 shows a state in which a shim 60 according to another embodiment of the present invention is sandwiched between the outer ring 38 s of the second bearing 38 and the stepped surface 46. The shim 60 includes an annular sandwiched portion 62 and a centering portion 64 that is integrally provided in a state of being shifted to the second case member 14 side by a predetermined dimension on the inner side. In the shim 60, the surface on the second bearing 38 side of the centering portion 64 that is the inner peripheral portion thereof, that is, the surface facing the inner ring 38u of the second bearing 38, is formed on the shim 60 in order to avoid interference with the inner ring 38u. Since the second case member 14 is deformed from the sandwiched portion (outer peripheral portion) 62, the same effects as those of the above-described embodiment can be obtained. In addition, according to the present embodiment, the shim 60 has an advantage that it can be easily manufactured by, for example, performing plastic working (press work) on a single disk and is inexpensive.

  The shim 70 in FIG. 7 has a shape corresponding to the annular sandwiched portion 52 or 62 of the shim 50 or 60 described above, and cushions between the shim 70 and the inner ring 38 u of the second bearing 38. In order to prevent this, the axial direction dimension of the outer ring 38s of the second bearing 38 is larger than that of the inner ring 38u.

  A shim 80 in FIG. 8 has a shape corresponding to the annular clamped portion 52 or 62 of the shim 50 or 60 described above, and is bent at right angles in the axial direction from the outer peripheral edge of the clamped portion 52 or 62. An annular groove 84 that engages with the annular protrusion 82 is formed on the outer peripheral edge of the outer ring 38 s of the second bearing 38. In the shim 80 of this embodiment, the centering is performed by the engagement of the annular protrusion 82 and the annular groove 84 formed in the outer ring 38 s of the second bearing 38. The annular protrusion 82 is bent at a right angle in the axial direction from the inner peripheral edge of the sandwiched portion 52 or 62, and engages with the annular protrusion 82 on the inner peripheral edge of the outer ring 38 s of the second bearing 38. An annular groove 84 may be formed.

  The preferred embodiments of the present invention have been described in detail with reference to the drawings. However, the present invention is not limited to these embodiments, and may be implemented in other modes.

  For example, in the above-described embodiment, the rotating shaft member support device applied to the vehicle power transmission device 10 used in the hybrid vehicle has been described. However, other devices such as an automatic transmission, a continuously variable transmission, a transfer device, and the like have been described. It may be applied to the device.

  In the above-described embodiment, the first counter gear shaft 26 has been described as the rotating shaft member. However, it may be a rotating shaft for achieving other purposes or functions.

  In addition, in the shims 50 and 60 of the above-described embodiment, the annular sandwiched portions 52 and 62 and the centering portions 54 and 64 are provided, but they may not be completely annular and are intermittent. An annular shape may be used.

  In addition, although not illustrated one by one, the present invention is implemented with various modifications within a range not departing from the gist thereof.

It is a figure which shows the assembly state of the power transmission device for hybrid vehicles to which the rotating shaft member support apparatus of this invention was applied. FIG. 2 is a cross-sectional view showing a configuration of a main part of the hybrid vehicle power transmission device of FIG. 1 and corresponding to a rotary shaft member support device that rotatably supports a first counter gear shaft. It is a front view explaining the structure of the shim used for FIG. 1 and FIG. It is sectional drawing explaining the structure of the shim used for FIG. 1 and FIG. It is a figure explaining the dimension shape of the shim of FIG. 3 and FIG. It is principal part sectional drawing for demonstrating the shim of the other Example of this invention, Comprising: It is a figure corresponded to 1 part of FIG. It is principal part sectional drawing for demonstrating the shim of the other Example of this invention, Comprising: It is a figure corresponded to 1 part of FIG. It is principal part sectional drawing for demonstrating the shim of the other Example of this invention, Comprising: It is a figure corresponded to 1 part of FIG.

Explanation of symbols

10: Power transmission device for hybrid vehicle (rotary shaft member support device)
12: First case member 14: Second case member 16: Housing 26: First counter gear shaft (rotary shaft member)
36: first bearing 38: second bearing 38s: outer ring 38u: inner ring 40: fitting hole (stepped hole)
42: Small diameter hole 44: Large diameter hole 46: Stepped surface 50, 60, 70, 80: Shim 52, 62: Clamped part (outer peripheral part)
54, 64: Centering part (inner circumference part)
56: Center hole (positioning hole)
58: Through hole

Claims (6)

A housing configured by combining the first case member and the second case member so that the openings of the first case member and the second case member are opposed to each other; and the first case member and the second case member in the housing. A rotary shaft member rotatably supported via a bearing and a second bearing, and the second case member has a small diameter hole and a large diameter concentric with the small diameter hole and larger in diameter than the small diameter hole. A stepped hole comprising a diameter hole is formed, and the outer ring of the second bearing is fitted into the large diameter hole and abuts against a stepped surface between the large diameter hole and the small diameter hole via a shim. The second case member side end of the rotary shaft member is a rotary shaft member supporting device of a type protruding through the inner ring of the second bearing,
The shim is sandwiched between the outer ring of the second bearing and the stepped surface, and is provided integrally with the sandwiched part and mounted on the outer ring of the second bearing during assembly. A rotating shaft member support device comprising: a centering portion that centers the second shaft member side end portion of the rotating shaft member that passes through the second bearing when placed. The shim is provided integrally with the annular outer peripheral portion as the sandwiched portion and the inner peripheral side of the outer peripheral portion, and is slightly larger than the diameter of the second case member side end portion of the rotating shaft member. And a rotating shaft member support device comprising an inner peripheral portion having a diameter positioning hole. The second case member side end of the rotating shaft member is allowed to penetrate the inner peripheral ring of the second bearing and be received in the small diameter hole,
The diameter of the positioning hole of the shim is D1, the outer diameter of the shim is D2, the thickness of the inner peripheral portion of the shim is t, the diameter of the second case member side end of the rotating shaft member is d, and the diameter of the small-diameter hole is The following formulas (1) and (2) are satisfied, where D3 is a diameter, and θ is an inclination angle of the shim fitted to the second case member side end of the rotating shaft member. Rotating shaft member support device.
t · tan θ = D1−d / cos θ (1)
D3 <D2cos θ (2) The surface of the inner peripheral portion of the shim facing the inner ring of the second bearing is deformed to the second housing side from the outer peripheral portion of the shim to avoid interference with the inner ring. The rotating shaft member support device according to any one of claims 1 to 3. The rotating shaft member according to claim 4, wherein the inner peripheral portion of the shim has a smaller thickness than the outer peripheral portion of the shim, and the shim has a target cross-sectional shape with respect to a center line in the thickness direction. Support device. The rotary shaft member support device according to any one of claims 2 to 5, wherein an inner peripheral portion of the shim includes one or a plurality of through holes for circulating lubricating oil.

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