WO2022176474A1 - 油圧作動装置 - Google Patents
油圧作動装置 Download PDFInfo
- Publication number
- WO2022176474A1 WO2022176474A1 PCT/JP2022/001519 JP2022001519W WO2022176474A1 WO 2022176474 A1 WO2022176474 A1 WO 2022176474A1 JP 2022001519 W JP2022001519 W JP 2022001519W WO 2022176474 A1 WO2022176474 A1 WO 2022176474A1
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- WO
- WIPO (PCT)
- Prior art keywords
- oil passage
- case
- tubular member
- axis
- insertion hole
- Prior art date
Links
- 238000004891 communication Methods 0.000 claims abstract description 6
- 239000003921 oil Substances 0.000 claims description 182
- 239000010687 lubricating oil Substances 0.000 claims description 40
- 230000005540 biological transmission Effects 0.000 claims description 28
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 238000003780 insertion Methods 0.000 description 83
- 230000037431 insertion Effects 0.000 description 83
- 238000010586 diagram Methods 0.000 description 27
- 238000007789 sealing Methods 0.000 description 9
- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 238000005452 bending Methods 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- 238000005266 casting Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000004308 accommodation Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/048—Type of gearings to be lubricated, cooled or heated
- F16H57/0487—Friction gearings
- F16H57/0489—Friction gearings with endless flexible members, e.g. belt CVTs
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/02—Gearboxes; Mounting gearing therein
- F16H57/035—Gearboxes for gearing with endless flexible members
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/042—Guidance of lubricant
- F16H57/0421—Guidance of lubricant on or within the casing, e.g. shields or baffles for collecting lubricant, tubes, pipes, grooves, channels or the like
- F16H57/0423—Lubricant guiding means mounted or supported on the casing, e.g. shields or baffles for collecting lubricant, tubes or pipes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/042—Guidance of lubricant
- F16H57/0421—Guidance of lubricant on or within the casing, e.g. shields or baffles for collecting lubricant, tubes, pipes, grooves, channels or the like
- F16H57/0424—Lubricant guiding means in the wall of or integrated with the casing, e.g. grooves, channels, holes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/0434—Features relating to lubrication or cooling or heating relating to lubrication supply, e.g. pumps ; Pressure control
- F16H57/0445—Features relating to lubrication or cooling or heating relating to lubrication supply, e.g. pumps ; Pressure control for supply of different gearbox casings or sections
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/0457—Splash lubrication
Definitions
- the present invention relates to hydraulic actuators.
- Patent Document 1 discloses a chain guide provided in a chain-type continuously variable transmission, which is a hydraulically operated device.
- the chain guide is attached to the case via a support member.
- a plurality of oil passages are formed in this type of case.
- a part of the oil passage opens to the case.
- the opening of the oil passage is sealed with a sealing member. Hydraulic actuators are required to reduce the increase in the number of parts.
- the hydraulic actuator comprises: a case; an oil passage provided in the case; and a support member that is provided in the case and supports the supported member,
- the oil passage has an opening that communicates the oil passage with the space in the case, The support member is inserted into the opening, Communication between the oil passage and the space inside the case is blocked by the support member.
- an increase in the number of parts can be reduced.
- FIG. 1 is a diagram illustrating a continuously variable transmission according to this embodiment.
- FIG. 2 is a diagram explaining the case.
- FIG. 3 is a diagram explaining the case.
- FIG. 4 is a diagram explaining the case.
- FIG. 5 is a diagram for explaining the arrangement of chain guides in the variator.
- FIG. 6 is a diagram explaining a chain guide.
- FIG. 7 is a diagram illustrating a tubular member.
- FIG. 8 is a diagram illustrating a tubular member.
- FIG. 9 is a diagram illustrating a tubular member.
- FIG. 10 is a diagram for explaining the arrangement of tubular members.
- FIG. 11 is a diagram illustrating ribs.
- FIG. 12 is a diagram for explaining the in-case oil passage.
- FIG. 13 is a diagram illustrating an oil passage in the case.
- FIG. 14 is a diagram explaining a continuously variable transmission according to a modification.
- a chain-type continuously variable transmission for a vehicle will be described below as an application example of the hydraulic actuator in one aspect of the present invention.
- FIG. 1 is a diagram illustrating a continuously variable transmission 1.
- continuously variable transmission 1 rotational driving force of an engine (not shown) is input to variator 4 via torque converter 2 and forward/reverse switching mechanism 3 .
- the rotational driving force is changed by the variator 4 and then transmitted to the driving wheels (not shown) via the reduction gear 5 and the differential gear 6 .
- the variator 4 has a pair of pulleys (a primary pulley 41 and a secondary pulley 42) and a chain 43 wound around the pair of pulleys.
- the chain 43 is an endless annular member in which a plurality of link plates (not shown) are connected with rocker pins (not shown).
- the primary pulley 41 and the secondary pulley 42 are provided rotatably around rotation axes X1 and X2 parallel to each other.
- the primary pulley 41 has a fixed pulley 411 and a movable pulley 415 that can be displaced in the rotation axis X1 direction.
- the fixed pulley 411 and the movable pulley 415 have sheave portions 412 and 416 extending in the radial direction of the rotation axis X1.
- These sheave portions 412, 416 have sheave surfaces 412a, 416a facing each other.
- the sheave surfaces 412a, 416a are inclined with respect to the rotation axis X1.
- a V-groove around which the chain 43 is wound is provided between the sheave surfaces 412a and 416a.
- the groove width of the V-groove is changed by the displacement of the movable pulley 415 in the direction of the rotation axis X ⁇ b>1 , so that the winding radius of the chain 43 on the primary pulley 41 is changed.
- the secondary pulley 42 also has a fixed pulley 421 and a movable pulley 425 that can be displaced in the direction of the rotation axis X2.
- the fixed pulley 421 and the movable pulley 425 have sheave portions 422 and 426 extending in the radial direction of the rotation axis X2.
- These sheave portions 422, 426 have sheave surfaces 422a, 426a facing each other.
- the sheave surfaces 422a, 426a are inclined with respect to the rotation axis X2.
- the secondary pulley 42 is provided with a V groove around which the chain 43 is wound between the sheave surfaces 422a and 426a.
- the groove width of the V groove is changed by the displacement of the movable pulley 425 in the direction of the rotation axis X ⁇ b>2 , so that the winding radius of the chain 43 on the secondary pulley 42 is changed.
- the rotational driving force of the engine is input to the primary pulley 41 via the torque converter 2 and the forward/reverse switching mechanism 3 .
- a rotational driving force input to the primary pulley 41 is transmitted to the secondary pulley 42 via the chain 43 .
- the rotational driving force input to the primary pulley 41 is changed and transmitted to the secondary pulley 42 .
- the rotational driving force transmitted to the secondary pulley 42 is transmitted to the reduction gear 5.
- the reduction gear 5 is rotatably provided around a rotation axis X3 parallel to the rotation axis X2.
- a final gear 60 of the differential gear 6 meshes with the reduction gear 5 so as to transmit rotation.
- the rotational driving force transmitted from the secondary pulley 42 to the reduction gear 5 is transmitted to the differential gear 6 via the final gear 60 .
- the drive shaft 61 connected to the differential gear 6 rotates around the rotation axis X4 parallel to the rotation axis X3.
- a drive wheel (not shown) to which the drive shaft 61 is connected is rotated by the transmitted rotational driving force.
- Transmission case 10 is composed of converter housing 11 , case 12 , and side cover 13 .
- the converter housing 11, the case 12, and the side cover 13 are stacked in order in the direction of the rotation axis X1.
- the converter housing 11 accommodates the torque converter 2 .
- Converter housing 11 is attached to an engine block (not shown) in the direction of rotation axis X1.
- the converter housing 11 and the engine block are fixed with bolts (not shown).
- the case 12 accommodates the forward/reverse switching mechanism 3, the variator 4, the reduction gear 5, and the differential gear 6.
- Case 12 is attached to converter housing 11 in the direction of rotation axis X1. Case 12 and converter housing 11 are fixed with bolts B. As shown in FIG.
- the side cover 13 is attached to the case 12 in the direction of the rotation axis X1.
- the side cover 13 and the case 12 are fixed with bolts B. As shown in FIG.
- FIG. 2 is a perspective view of the case 12 viewed from the side cover 13 side.
- FIG. 3 is a front view of the case 12 viewed from the side cover 13 side.
- FIG. 4 is a front view of the case 12 viewed from the converter housing 11 side.
- the variator 4 is indicated by an imaginary line.
- the forward/reverse switching mechanism 3, the reduction gear 5, and the final gear 60 are indicated by phantom lines.
- the joint surface is hatched.
- the joint surface and the arcuate walls 123 and 124 are hatched.
- the case 12 has an intermediate wall portion 125 as shown in FIG.
- the intermediate wall portion 125 is formed in the internal space of the case 12 .
- the intermediate wall portion 125 is formed in a direction that intersects the rotation axes X1 and X2.
- the internal space of the case 12 is divided by the intermediate wall portion 125 into a space S1 (see FIG. 3) and a space S2 (see FIG. 4).
- Space S1 is positioned on one side (side cover 13 side) of intermediate wall portion 125 in the directions of rotation axes X1 and X2, and space S2 is positioned on the other side (converter housing 11 side).
- the space S1 is a space within a recess formed by surrounding the intermediate wall portion 125 with the annular wall 121.
- the space S ⁇ b>2 is a space within a recess formed by surrounding the intermediate wall portion 125 with the annular wall 122 .
- the annular wall 121 and the annular wall 122 extend in directions away from each other from the intermediate wall portion 125 (front-to-rear direction in FIG. 2).
- the space S1 of the case 12 accommodates the variator 4 (see the phantom line in FIG. 3).
- the space S2 of the case 12 accommodates the forward/reverse switching mechanism 3, the reduction gear 5, and the differential gear 6 (final gear 60) (see phantom lines in FIG. 4).
- the intermediate wall portion 125 of the case 12 is formed with through holes 125a and 125b.
- the through holes 125a and 125b are formed in regions where the rotation axes X1 and X2 of the primary pulley 41 and the secondary pulley 42 intersect. Space S1 and space S2 communicate with each other through these through holes 125a and 125b.
- the intermediate wall portion 125 of the case 12 is formed with a through hole 125c.
- the through hole 125c is formed in a region that intersects the rotation axis X4 of the final gear 60.
- the space S2 also communicates with the area outside the annular wall 121 (area outside the space S1) via the through hole 125c (see FIG. 3).
- an arcuate wall 123 surrounding the through hole 125a and an arcuate wall 124 surrounding the through hole 125c are formed on the space S2 side of the intermediate wall portion 125.
- a region of the space S2 surrounded by the arcuate wall 123 constitutes an accommodation chamber R1 that accommodates the forward/reverse switching mechanism 3 .
- a region of the space S2 surrounded by the arcuate wall 124 forms a differential chamber R2 that houses the final gear 60.
- the variator 4 is accommodated within the space S1 of the case 12.
- the chain 43 is wound around the primary pulley 41 and the secondary pulley 42 within the space S1.
- the continuously variable transmission 1 includes chain guides 9A and 9B (see FIG. 5) for reducing vibration of the chain 43.
- FIG. 5 is a diagram illustrating the arrangement of the chain guides 9A and 9B in the variator 4. As shown in FIG. 5 corresponds to the variator 4 indicated by the phantom lines in FIG. 5, for convenience of explanation, one chain guide 9A is shown in a schematic sectional view, and the other chain guide 9B is shown in a side view. Also, the chain 43 is simply shown.
- the chain guides 9A and 9B are arranged in areas of the chain 43 that are not wound around the primary pulley 41 and the secondary pulley 42 .
- the chain guides 9A and 9B are arranged in a symmetrical positional relationship with respect to the straight line Lm1.
- a straight line Lm1 is a line connecting the rotation axis X1 of the primary pulley 41 and the rotation axis X2 of the secondary pulley 42 .
- the chain guide 9A and the chain guide 9B are arranged above and below the straight line Lm1 in the direction of the vertical line VL.
- the vertical line VL is a line based on the mounting state of the continuously variable transmission 1 on the vehicle.
- the chain guide 9A is pivotably connected to a chain guide support shaft 7A.
- the chain guide 9B is pivotably connected to the chain guide support shaft 7B.
- These chain guide support shafts 7A and 7B are arranged in a symmetrical positional relationship with respect to the straight line Lm1.
- the chain guide support shafts 7A and 7B are arranged inside the chain 43 when viewed from the directions of the rotation axes X1 and X2.
- the chain guide support shafts 7A, 7B are respectively supported by tubular members 8A, 8B which will be described later.
- the chain guides 9A and 9B according to this embodiment have the same shape.
- the chain guide 9B will be taken as an example. Description of the chain guide 9A is omitted.
- FIG. 6 is a diagram for explaining the chain guide 9B, and shows a perspective view of the chain guide 9B as viewed from the intermediate wall portion 125 side.
- the tubular member 8B is separated from the chain guide support shaft 7B.
- FIG. 7 is a perspective view illustrating the tubular member 8B.
- FIG. 8 is a diagram for explaining the tubular member 8B, and is a schematic cross-sectional view of the tubular member 8B of FIG. 7 taken along the longitudinal direction.
- FIG. 9 is a diagram for explaining the tubular member 8B, and is a schematic diagram of the AA cross section of FIG.
- FIG. 10 is a diagram for explaining the arrangement of the tubular members 8A and 8B in the space S1, and is a schematic diagram of the AA cross section in FIG.
- the chain guide 9B is composed of a pair of guide members 91R and 91L. These guide members 91R and 91L have the same shape.
- the chain guide 9B is formed by overlapping guide members 91R and 91L in the direction of a straight line Lx1 parallel to the rotation axes X1 and X2.
- the guide member 91R has guide portions 910Ra and 910Rb and a connection portion 911R that connects the guide portions 910Ra and 910Rb.
- the guide portions 910Ra and 910Rb are arranged on one side and the other side of the chain 43 in the thickness direction (vertical direction in FIG. 6).
- the connection portion 911R is arranged on the side of the chain 43 (on the right side in FIG. 6).
- the guide portions 910Ra, 910Rb and the connecting portion 911R of the guide member 91R are integrally formed from the same material.
- the guide portions 910Ra and 910Rb are plate-like members arranged along the longitudinal direction of the chain 43 .
- the connecting portion 911R connects the central portions of the guide portions 910Ra and 910Rb in the longitudinal direction.
- the guide member 91L has guide portions 910La and 910Lb and a connection portion 911L that connects the guide portions 910La and 910Lb.
- the guide portions 910La and 910Lb are arranged on one side and the other side of the chain 43 in the thickness direction (vertical direction in FIG. 6).
- the connecting portion 911L is arranged on the side of the chain 43 (left side in FIG. 6).
- the guide portions 910La and 910Lb and the connection portion 911L of the guide member 91L are integrally formed from the same material.
- the guide portions 910La and 910Lb are plate-like members arranged along the longitudinal direction of the chain 43 .
- the connecting portion 911L connects the central portions of the guide portions 910La and 910Lb in the longitudinal direction.
- the guide members 91R and 91L are overlapped in the straight line Lx1 direction.
- the guide portions 910Ra and 910La and the guide portions 910Rb and 910Lb are in contact with each other over the entire length of the chain 43 in the longitudinal direction.
- the chain 43 is arranged in a space surrounded by the guide portions 910Ra and 910Rb and the connection portion 911R of the guide member 91R and the guide portions 910La and 910Lb and the connection portion 911L of the guide member 91L.
- the guide members 91R, 91L have connecting portions 912R, 912L that are connected to the chain guide support shaft 7B.
- the connecting portions 912R and 912L are also formed integrally with the guide portions 910Ra and 910La.
- the connecting portions 912R and 912L are formed in the central portions in the longitudinal direction of the guide portions 910Ra and 910La, respectively.
- the connecting portions 912R and 912L are superimposed on each other in the direction of the straight line Lx1 and connected with bolts B. As shown in FIG. As a result, the guide members 91R and 91L are maintained in a state of being overlapped in the direction of the straight line Lx1.
- the chain guide support shaft 7B is a single shaft-shaped member arranged along an axis Lx2 parallel to the rotation axes X1 and X2.
- the chain guide support shaft 7B has a small diameter shaft portion 70 and a large diameter shaft portion 71 .
- the chain guide support shaft 7B has a small diameter shaft portion 70 on one end 7a side (left side in the drawing) in the direction of the axis Lx2, and a large diameter shaft portion 70 on the other end 7b side (right side in the drawing).
- a shaft portion 71 is formed.
- the boundary between the small-diameter shaft portion 70 and the large-diameter shaft portion 71 is a step surface 73 .
- the step surface 73 is a flat surface perpendicular to the axis Lx2.
- the small diameter shaft portion 70 of the chain guide support shaft 7B is inserted into the insertion hole 131 of the side cover 13 from the direction of the axis Lx2.
- the step surface 73 of the chain guide support shaft 7B abuts on the peripheral edge portion 131a of the insertion hole 131 from the direction of the axis Lx2.
- the large-diameter shaft portion 71 of the chain guide support shaft 7B has a flange-like support plate 711 .
- the support plate 711 is formed at an intermediate position of the large-diameter shaft portion 71 in the direction of the axis Lx2.
- the middle position of the large-diameter shaft portion 71 is between one end and the other end of the large-diameter shaft portion 71 in the direction of the axis Lx2.
- the support plate 711 extends radially outward of the axis Lx2 from the outer periphery of the large-diameter shaft portion 71 .
- the support plate 711 surrounds the large-diameter shaft portion 71 over the entire circumferential direction around the axis Lx2 (see FIG. 6).
- an insertion hole 72 is opened in the other end 7b of the chain guide support shaft 7B.
- the insertion hole 72 extends inside the large-diameter shaft portion 71 in the direction of the axis Lx2.
- the tubular member 8B is inserted into the insertion hole 72 from the direction of the axis Lx2 (see FIG. 6).
- the tubular member 8B is formed by bending a single steel pipe at two points between one end and the other end in the longitudinal direction.
- the tubular member 8B includes a first tubular portion 80 arranged along the axis Lx2 and a second tubular portion 81 arranged along the axis Lx3. and have Axis Lx3 is parallel to axis Lx2.
- the first tubular portion 80 and the second tubular portion 81 are connected via a tubular connecting portion 82 .
- the first tubular portion 80 is located on the side of one end 8a (left side in the drawing) of the tubular member 8B in the longitudinal direction
- the second tubular portion 81 is located on the side of the other end 8b (right side in the drawing). .
- the first tubular portion 80 has a bottom wall portion 802 orthogonal to the axis Lx2 and a tubular wall portion 801 surrounding the entire outer circumference of the bottom wall portion 802 .
- the cylindrical wall portion 801 extends from the bottom wall portion 802 to the other side (right side in the drawing) in the direction of the axis Lx2.
- the cylindrical wall portion 801 is connected to the connecting portion 82 on the other side in the direction of the axis Lx2.
- the connecting portion 82 is arranged along an axis La that intersects the axis Lx2 and the axis Lx3.
- the connecting portion 82 is connected to the second tubular portion 81 on the side opposite to the first tubular portion 80 in the direction of the axis La.
- the second tubular portion 81 has a tubular wall portion 811 surrounding the axis Lx3.
- the cylindrical wall portion 811 extends from the connecting portion 82 to the other side (right side in the drawing) in the direction of the axis Lx3.
- the cylindrical wall portion 811 has an open end 811c on the other end face (the other end 8b) in the direction of the axis Lx3.
- the tubular member 8B has a cylindrical shape with a bottom as a whole.
- the internal spaces of the first tubular portion 80, the connecting portion 82, and the second tubular portion 81 communicate with each other, forming one oil passage 85 within the tubular member 8B.
- One end of the oil passage 85 is sealed with the bottom wall portion 802 of the first tubular portion 80 .
- the other end of the oil passage 35 communicates with the outside through the open end 811c of the second tubular portion 81 .
- a flange-shaped support plate 803 is formed on the first tubular portion 80 of the tubular member 8B.
- the support plate 803 is formed at an intermediate position of the cylindrical wall portion 801 in the direction of the axis Lx2.
- the middle position of the cylinder wall portion 801 is between one end and the other end of the cylinder wall portion 801 in the direction of the axis Lx2.
- the support plate 803 extends radially outward of the axis Lx2 from the outer periphery of the cylinder wall portion 801 .
- the support plate 803 surrounds the cylindrical wall portion 801 along the entire circumferential direction around the axis Lx2 (see FIG. 9).
- the support plate 803 has an inner diameter side area 803a and an outer diameter side area 803b in the radial direction (vertical direction in the drawing) of the axis Lx2.
- the inner diameter side region 803a is offset from the outer diameter side region 803b to the other side (right side in the figure) in the direction of the axis Lx2.
- the support plate 803 has a recess 803c inside an outer diameter side region 803b in the radial direction of the axis Lx2.
- the second tubular portion 81 has a strip-shaped bracket 813.
- the bracket 813 is formed at an intermediate position of the cylindrical wall portion 811 in the direction of the axis Lx3.
- the middle position of the cylinder wall portion 811 is between one end and the other end of the cylinder wall portion 811 in the direction of the axis Lx3.
- the bracket 813 is fixed to the cylindrical wall portion 811 with its thickness direction aligned with the direction of the axis Lx3.
- a straight line Lp extending along the longitudinal direction of the bracket 813 crosses the axis Lx2 and the axis Lx3.
- the tubular wall portion 811 is positioned on one side (the upper side in the drawing) of the bracket 813 in the direction of the straight line Lp.
- a through hole 813a is formed through the bracket 813 in the thickness direction on the other side (lower side in the figure) of the bracket 813 in the direction of the straight line Lp.
- the cylindrical wall portion 811 of the second cylindrical portion 81 is formed with a through hole 815 penetrating through the cylindrical wall portion 811 in the thickness direction.
- the through hole 815 is positioned on the other end 8b side of the tubular member 8B.
- a distance between the through-hole 815 and the bracket 813 in the direction of the axis Lx3 is set to T1.
- the through hole 815 communicates the outside of the tubular member 8B with the oil passage 85. Further, when viewed from the direction of the axis Lx3, the through holes 815 are formed so as to be displaced in the circumferential direction around the axis Lx3 with respect to the straight line Lp. Straight line Lq connecting through hole 815 and axis Lx3 is inclined with respect to straight line Lp along the longitudinal direction of bracket 813 .
- the first tubular portion 80 of the tubular member 8B is inserted into the insertion hole 72 of the chain guide support shaft 7B from the direction of the axis Lx2.
- the second tubular portion 81 of the tubular member 8B is inserted into the insertion hole 128 formed in the intermediate wall portion 125 .
- the second tubular portion 81 is inserted into the insertion hole 128 from the direction of the axis Lx3.
- a boss portion 129 is formed on the intermediate wall portion 125 of the case 12 .
- the bracket 813 is fixed to the boss portion 129 with a bolt B from the direction of the axis Lx4 parallel to the axis Lx3.
- the insertion hole 128 and the boss portion 129 are formed below the straight line Lm1 in the intermediate wall portion 125 (see FIG. 11).
- the support plate 711 of the chain guide support shaft 7B and the support plate 803 of the tubular member 8B are spaced apart in the direction of the axis Lx2.
- the connecting portions 912L and 912R of the chain guide 9B are arranged between the support plate 711 and the support plate 803 in the direction of the axis Lx2.
- the vibration of the belt 43 is received by the chain guide 9B, passed through the chain guide support shaft 7B and the tubular member 8B, and finally dispersed to the case 12 and the side cover 13. Vibration of the belt 43 is thereby reduced.
- the first tubular portion 80 of the tubular member 8B is inserted into the insertion hole 72 of the chain guide support shaft 7B, and the concave portion 803c of the support plate 803 is inserted into the chain guide support shaft 7B.
- the other end 7b side of is accommodated.
- the tubular member 8B supports the chain guide support shaft 7B while preventing the chain guide support shaft 7B itself from vibrating with the belt 43 and swaying in the radial direction of the axis Lx2. That is, regarding the relationship between the tubular member 8B and the chain guide support shaft 7B, the tubular member 8B constitutes the supporting member and the chain guide support shaft 7B constitutes the supported member.
- the chain guide 9A also has connecting portions 912L and 912R.
- the chain guide 9A is connected to the chain guide support shaft 7A via connecting portions 912L and 912R.
- the chain guide support shaft 7A is a single shaft-shaped member and has the same basic shape as the chain guide support shaft 7B.
- the chain guide support shaft 7A will be described below. In the following description, portions of the chain guide support shaft 7A that differ from the chain guide support shaft 7B will be described. Parts common to the chain guide support shaft 7B are described using the same reference numerals.
- the chain guide support shaft 7A is oriented along an axis Lx5 parallel to the rotation axes X1 and X2 (see FIG. 6).
- the chain guide support shaft 7A has a small diameter shaft portion 70 and a large diameter shaft portion 71.
- the small-diameter shaft portion 70 is located on the one end 7a side of the chain guide support shaft 7A in the direction of the axis Lx5, and the large-diameter shaft portion 71 is located on the other end 7b side.
- the small-diameter shaft portion 70 of the chain guide support shaft 7A is inserted into the insertion hole 132 of the side cover 13 from the direction of the axis Lx5.
- the stepped surface 73 of the chain guide support shaft 7A contacts the peripheral edge portion 132a of the insertion hole 132 from the direction of the axis Lx5.
- An oil passage 75 extending in the direction of the axis Lx5 is formed inside the chain guide support shaft 7A.
- the oil passage 75 penetrates the small-diameter shaft portion 70 and the large-diameter shaft portion 71 in the direction of the axis Lx5.
- the oil passage 75 opens at one end 7a and the other end 7b of the chain guide support shaft 7A.
- an injection hole 76 is formed in a region between the support plate 711 and the other end 7b in the direction of the axis Lx5.
- the injection hole 76 penetrates the large-diameter shaft portion 71 in a direction perpendicular to the axis Lx5, and communicates the oil passage 75 and the space S1.
- a tubular member 8A is inserted into the oil passage 75 of the chain guide support shaft 7A from the other end 7b side.
- the tubular member 8A is formed by bending a single steel pipe at two points between one end and the other end in the longitudinal direction, and has the same basic shape as the tubular member 8B described above.
- the tubular member 8A will be described below. In the following description, portions of the tubular member 8A that differ from the tubular member 8B will be described. Parts that are the same as those of the tubular member 8B will be described using the same reference numerals.
- the tubular member 8A does not have the bottom wall portion 802 of the first cylindrical portion 80, and is different from the tubular member 8B in that the oil passages 85 are open at both ends in the longitudinal direction. Further, the tubular member 8A is different from the tubular member 8B in that the second tubular portion 81 does not have the through hole 815 .
- the first tubular portion 80 of the tubular member 8A is inserted into the oil passage 75 of the chain guide support shaft 7A from the direction of the axis Lx5.
- the second tubular portion 81 of the tubular member 8A is inserted into the insertion hole 126 formed in the intermediate wall portion 125 .
- the second tubular portion 81 is inserted into the insertion hole 126 from the direction of the axis Lx6 parallel to the axis Lx5.
- the bracket 813 is fixed with a bolt B to a boss portion 127 formed on the intermediate wall portion 125 of the case 12 .
- the insertion hole 126 and the boss portion 127 are formed above the straight line Lm1 in the intermediate wall portion 125 (see FIG. 11).
- an insertion hole 126 into which the second tubular portion 81 of the tubular member 8A is inserted communicates with the case internal oil passage 15 within the intermediate wall portion 125 .
- An insertion hole 128 into which the second tubular portion 81 of the tubular member 8B is inserted communicates with the case internal oil passage 16 within the intermediate wall portion 125 .
- These in-case oil passages 15 and 16 are lubricating oil passages for supplying the lubricating oil OL in the case 12, which is raked up by the rotation of the final gear 60 (see FIG. 4), to a predetermined region in the case 12. .
- the in-case oil passage 15 extends in the intermediate wall portion 125 in the direction of the axis Lx6.
- the other end 15b of the in-case oil passage 15 in the direction of the axis Lx6 opens into the arcuate wall 123 (see FIG. 4) on the space S2 side.
- An insertion hole 126 is connected to one end 15a of the in-case oil passage 15 in the direction of the axis Lx6.
- the insertion hole 126 extends in the direction of the axis Lx6.
- the end of the insertion hole 126 on the side opposite to the in-case oil passage 15 (space S1 side) in the direction of the axis Lx6 opens to the surface of the intermediate wall portion 125 (see FIG. 11).
- the in-case oil passage 15 communicates with the space S ⁇ b>1 through an insertion hole 126 .
- the insertion hole 126 constitutes a part of the in-case oil passage 15 .
- the first tubular portion 80 of the tubular member 8A is inserted into the oil passage 75 of the chain guide support shaft 7A, and the second tubular portion 81 is inserted into the insertion hole 126.
- the oil passage 85 of the tubular member 8A communicates with the oil passage 75 of the chain guide support shaft 7A on the first tubular portion 80 side, and communicates with the in-case oil passage 15 on the second tubular portion 81 side. .
- An oil passage 135 formed in the side cover 13 communicates with the insertion hole 132 of the side cover 13 into which the small diameter shaft portion 70 of the chain guide support shaft 7A is inserted. Therefore, the in-case oil passage 15 communicates with the oil passage 135 of the side cover 13 through the oil passage 85 of the tubular member 8A and the oil passage 75 of the chain guide support shaft 7A.
- part of the lubricating oil OL raked up by the rotation of the final gear 60 flows from the other end 15b (see FIG. 4) of the in-case oil passage 15, and flows from the one end 15a into the oil passage 85 of the tubular member 8A. supplied to Then, the lubricating oil OL supplied to the oil passage 85 finally moves to the oil passage 135 of the side cover 13 through the oil passage 75 of the chain guide support shaft 7A. A part of the lubricating oil OL passing through the oil passage 75 is injected from the injection holes 76 to lubricate the chain 43 .
- the in-case oil passage 16 is formed within a rib 18 (see FIG. 2) provided on the intermediate wall portion 125 .
- the rib 18 bulges from the intermediate wall portion 125 toward the space S1 (the front side of the paper surface in FIG. 2) in the directions of the rotation axes X1 and X2.
- FIG. 11 is a diagram for explaining the rib 18, and is an enlarged view of area A in FIG.
- FIG. 12 is a diagram for explaining the in-case oil passages 16 formed in the ribs 18, and is a schematic diagram of the AA cross section in FIG.
- FIG. 13 is a diagram illustrating the arrangement of the tubular member 8B. In addition, in FIG. 12, the tubular member 8B is indicated by a virtual line. 12 and 13, the final gear 60 of the differential chamber R2 is omitted.
- the rib 18 is formed to bulge from the intermediate wall portion 125 toward the front side of the paper surface.
- the rib 18 is positioned below a straight line Lm1 connecting the rotation axis X1 and the rotation axis X2.
- the rib 18 is provided along the straight line Lr.
- the straight line Lr is substantially parallel to the straight line Lm2 connecting the rotation axis X1 and the rotation axis X4.
- the rib 18 traverses the annular wall 121 from the inside to the outside.
- One end 18a (left side in the figure) of the rib 18 in the direction of the straight line Lr is located in the space S1 and near the through hole 125a.
- the other end 18b (right side in the figure) of the rib 18 in the direction of the straight line Lr is positioned outside the space S1 and near the through hole 125c.
- the insertion hole 128 and the boss 129 are formed on one end 18a of the rib 18 (on the left side in the figure).
- the insertion hole 128 is positioned on the straight line Lr.
- the boss portion 129 is positioned on the other end portion 18b side of the rib 18 when viewed from the insertion hole 128 and below the straight line Lr.
- an in-case oil passage 16 is formed in the rib 18 .
- the in-case oil passage 16 When viewed from the direction of the rotation axis X4, the in-case oil passage 16 extends in the radial direction of the rotation axis X4 in a region overlapping with the differential chamber R2. In FIG. 4, the position of the in-case oil passage 16 is indicated by a dashed line.
- the case internal oil passage 16 has an outer diameter side oil passage 161 , an inner diameter side oil passage 162 and a connecting oil passage 163 .
- the outer diameter side oil passage 161 is provided along the rotation axis X4. One end 161 a of the outer diameter side oil passage 161 communicates with the insertion hole 128 . The other end 161b of the outer diameter side oil passage 161 opens into the arcuate wall 123 (see FIG. 4).
- An insertion hole 128 communicating with one end 161a of the outer diameter oil passage 161 is provided in series with the outer diameter oil passage 161 in a direction along the rotation axis X4.
- the insertion hole 128 and the outer diameter side oil passage 161 are arranged concentrically.
- the insertion hole 128 opens to the surface of the intermediate wall portion 125 (ribs 18) at the end opposite to the outer diameter side oil passage 161 in the direction of the rotation axis X4 (lower side in FIG. 12).
- An outer diameter side oil passage 161 of the case inner oil passage 16 communicates with the space S1 through the insertion hole 128 .
- the insertion hole 128 constitutes a part of the in-case oil passage 16 .
- connection oil passage 163 opens at a midway position of the insertion hole 128 in the direction of the rotation axis X4.
- the middle position of the insertion hole 128 is between one end and the other end of the insertion hole 128 in the rotation axis X4 direction.
- the connection oil passage 163 extends in the rib 18 in the direction of the straight line Lr (horizontal direction in FIG. 12).
- the other end 163 b of the connecting oil passage 163 opens toward the outside of the annular wall 121 .
- the opening of the other end 163b is sealed with a plug Hs.
- the plug Hs includes, for example, a known hollow set.
- One end 162a of the inner diameter side oil passage 162 is open at the other end 163b side of the connection oil passage 163 .
- the inner diameter side oil passage 162 is located on the inner diameter side of the outer diameter side oil passage 161 in the radial direction of the rotation axis X4.
- the inner diameter side oil passage 162 extends in the direction of the rotation axis X4, and the other end 162b opens to the differential chamber R2 (see FIG. 4).
- the straight line Ls connecting the insertion hole 128 and the boss portion 129 is inclined with respect to the straight line Lr.
- the inclination of the straight line Lr with respect to the straight line Ls is the same as the inclination of the straight line Lq with respect to the straight line Lp (see FIG. 9) in the bracket 813 of the tubular member 8B.
- the distance between the surface of the rib 18 and the straight line Lr in the rotation axis X4 direction is set to T2.
- the second tubular portion 81 of the tubular member 8B is inserted into the insertion hole 128.
- the oil passage 85 inside the tubular member 8B communicates with the outer diameter side oil passage 161 via the open end 811c.
- the bracket 813 is fixed to the boss portion 129 while the second tubular portion 81 is inserted into the insertion hole 128 .
- a straight line Lp along the longitudinal direction of the bracket 813 is arranged at a position coinciding with a straight line Ls connecting the insertion hole 128 and the boss portion 129 . In this state, a straight line Lq (see FIG.
- the insertion hole 128 constitutes part of the in-case oil passage 16 . Therefore, by inserting the tubular member 8B into the insertion hole 128, the oil passage 85 of the tubular member 8B also constitutes a part of the in-case oil passage 16. As shown in FIG.
- the oil passage 85 is an oil passage interposed between the outer diameter side oil passage 161 and the connecting oil passage 163 (see FIG. 13).
- One end of the oil passage 85 (lower side in FIG. 13) is sealed with a bottom wall portion 802 . Then, the lubricating oil OL sequentially flows into the oil passage 85 from the open end 811c side. Therefore, the interior of the oil passage 85 is finally filled with the lubricating oil OL.
- the lubricating oil OL that has moved from the through hole 815 to the connecting oil passage 163 moves through the connecting oil passage 163 from the one end 163a side to the other end 163b side (arrow C in FIG. 13).
- the other end 163b of the connection oil passage 163 is sealed with a plug Hs. Therefore, the lubricating oil OL moving in the connecting oil passage 163 is changed in direction by the plug Hs and moves into the inner diameter side oil passage 162 from the one end 162a.
- the lubricating oil OL passing through the inner diameter side oil passage 162 is returned from the other end 162b to the differential chamber R2 (arrow D in FIG. 13).
- the lubricating oil OL returned to the differential chamber R2 is again swept up by the rotation of the final gear 60 (see FIG. 4).
- the case 12 is manufactured by casting.
- the in-case oil passages 15 and 16 of the case 12 are formed by placing cores at predetermined positions in the mold when casting the case 12, and then pouring and solidifying molten metal. be done.
- the core has a shape corresponding to each of the in-case oil passages 15 and 16 .
- the portions where the core and the mold were in contact appear as openings of the in-case oil passages 15 and 16 .
- the insertion holes 126 and 128 and the other end 163b side of the connection oil passage 163 correspond to the openings of the in-case oil passages 15 and 16.
- the in-case oil passage 15 is used to supply lubricating oil OL to the variator 4 side. Therefore, the insertion hole 126 serving as the opening of the in-case oil passage 15 is used as it is open.
- the in-case oil passage 16 is used to return the lubricating oil OL to the differential chamber R2. In order to reliably return the lubricating oil OL to the differential chamber R2, the insertion hole 128 serving as the opening of the in-case oil passage 16 and the other end 163b side of the connection oil passage 163 are sealed with a sealing member.
- the tubular member 8B is inserted into the insertion hole 128.
- a plug Hs is inserted into the other end 163 b of the connection oil passage 163 .
- the tubular member 8B and the plug Hs each correspond to a sealing member.
- the tubular member 8B is inserted into an insertion hole 128 in the case 12 (see FIG. 13).
- the tubular member 8B supports the chain guide support shaft 7B and blocks the communication between the in-case oil passage 16 and the space S1 through the insertion hole 128. That is, the tubular member 8B is supported. It has both a function as a member and a function as a plug. A separate plug for sealing the insertion hole 128 may not be used.
- the tubular member 8B is a hollow steel pipe and has an oil passage 85 and a through hole 815.
- the oil passage 85 and the through-hole 815 form part of the in-case oil passage 16.
- the support strength for supporting the chain guide support shaft 7B can be improved.
- the continuously variable transmission 1 is case 12; an in-case oil passage 16 (oil passage) provided in the case 12; and a tubular member 8B (support member) provided in the case 12 and supporting the chain guide support shaft 7B (supported member).
- the in-case oil passage 16 has an insertion hole 128 (opening) that communicates between the in-case oil passage 16 and the space S ⁇ b>1 inside the case 12 .
- the tubular member 8B is inserted into the insertion hole 128. As shown in FIG. Communication between the in-case oil passage 16 and the space S1 in the case 12 is blocked by the tubular member 8B.
- the tubular member 8B can seal the insertion hole 128 while supporting the chain guide support shaft 7B.
- the number of parts can be reduced by the amount that the support member for supporting the chain guide support shaft 7B and the plug for sealing the insertion hole 128 are not required.
- the tubular member 8B inserts the second tubular portion 81 into the insertion hole 128 from the direction of the axis Lx3.
- the tubular member 8B is fixed to the case 12 with the tightening force (pressing force) of the bolt B (fastening member) applied along the axis Lx4 direction parallel to the axis Lx3 direction (insertion direction). .
- the tubular member 8B receives pressure from the lubricating oil OL flowing into the oil passage 85 from the outer diameter side oil passage 161 of the in-case oil passage 16 .
- This pressure acts in a direction (downward in FIG. 13) in which the tubular member 8B is pulled out from the insertion hole 128.
- the fastening force of the bolt B applied to the tubular member 8B is directed against the pressure received from the lubricating oil OL. This prevents the tubular member 8B from slipping out of the insertion hole 128, and improves the sealing performance of the insertion hole 128 by the tubular member 8B.
- the in-case oil passage 16 is a lubricating oil passage that supplies the lubricating oil OL to the differential chamber R2.
- An insertion hole 128 provided in the in-case oil passage 16 is sealed with a tubular member 8B.
- a continuously variable transmission 1 A primary pulley 41 and a secondary pulley 42 that constitute a pair of pulleys, A chain 43 (endless annular member) is wound around the primary pulley 41 and the secondary pulley 42 .
- a chain guide 9B connected to the chain guide support shaft 7B is a guide member that guides the chain 43. As shown in FIG.
- the tubular member 8B supports a chain guide support shaft 7B connected to the chain guide 9B.
- the tubular member 8B has a bottomed tubular shape having a bottom wall portion 802, a first tubular portion 80 surrounding the bottom wall portion 802, a connecting portion 82, and a second tubular portion 81. is formed.
- a tubular wall portion 811 (side wall) of the second tubular portion 81 of the tubular member 8B is formed with a through hole 815 penetrating through the tubular wall portion 811 .
- the tubular member 8B is inserted into the insertion hole 128 from the opening end 811c side of the second tubular portion 81, and the through hole 815 communicates with the connecting oil passage 163 of the case internal oil passage 16. As shown in FIG.
- the lubricating oil OL in the case internal oil passage 16 flows from the outer diameter side oil passage 161 through the opening end 811c into the oil passage 85 (internal space) of the tubular member 8B, and then flows through the through hole 815 to the connecting oil passage 163. discharged to
- the oil passage 85 of the tubular member 8B becomes a part of the in-case oil passage 16 .
- the flow of the lubricating oil OL in the in-case oil passage 16 can be smoothly changed.
- the support strength for supporting the chain guide support shaft 7B can be improved.
- the single tubular member 8B can serve both to support the chain guide support shaft 7B and to seal the insertion hole 128. can.
- the support structure 100 for the tubular member 8B case 12; an in-case oil passage 16 provided in the case 12; and a tubular member 8B provided in the case 12 and supporting the chain guide support shaft 7B.
- the in-case oil passage 16 has an insertion hole 128 that communicates between the in-case oil passage 16 and the space S ⁇ b>1 inside the case 12 .
- the tubular member 8B is inserted into the insertion hole 128. As shown in FIG.
- the tubular member 8B is supported by the case 12 while blocking communication between the in-case oil passage 16 and the space S1 inside the case 12 .
- the tubular member 8B can seal the insertion hole 128 while supporting the chain guide support shaft 7B.
- the number of parts can be reduced by the amount that the support member for supporting the chain guide support shaft 7B and the plug for sealing the insertion hole 128 are not required.
- the open end 811c of the tubular member 8B communicates with the outer diameter side oil passage 161 of the case internal oil passage 16, and the through hole 815 communicates with the connection oil passage 163.
- the case is exemplified, it is not limited to this aspect. For example, the following modifications may be used.
- FIG. 14 is a diagram illustrating a continuously variable transmission 1A according to a modification.
- the continuously variable transmission 1A according to the modified example only the portions different from the continuously variable transmission 1 according to the present embodiment will be described.
- the insertion hole 128A extends in the direction of the straight line Lr' orthogonal to the axis Lx2 and is connected in series with the connection oil passage 163'.
- An outer diameter side oil passage 161 is connected to an intermediate position of the insertion hole 128A in the direction of the straight line Lr'.
- the middle position of the insertion hole 128A is between one end and the other end of the insertion hole 128A in the direction of the straight line Lr'.
- the tubular member 8B' is formed by bending a single steel pipe at one point between one end and the other end in the longitudinal direction, and has a substantially L shape.
- the tubular member 8B′ has a first tubular portion 80 arranged along the straight line Lx2 and a second tubular portion 81′ arranged along the straight line Lr′. is doing.
- the through hole 815 communicates with the outer diameter side oil passage 161 of the case internal oil passage 16, and the open end 811c is connected to the connecting oil passage 163'. communicate with.
- the lubricating oil OL flows from the outer diameter side oil passage 161 through the through hole 815 into the oil passage 85 of the tubular member 8B'.
- the lubricating oil OL is discharged from the open end 811c to the connecting oil passage 163'.
- the lubricating oil OL is discharged from the connection oil passage 163' through the inner diameter side oil passage 162 to the differential chamber R2 (see arrows E to H in FIG. 14).
- the continuously variable transmission 1A has, for example, the following configuration.
- the tubular member 8B' has a cylindrical shape with a bottom.
- the tubular member 8B' has a tubular wall portion 811 (side wall) of the second tubular portion 81' formed with a through hole 815 passing through the tubular wall portion 811.
- the tubular member 8B' is inserted into the insertion hole 128A from the opening end 811c side of the second tubular portion 81, and the through hole 815 communicates with the outer diameter side oil passage 161 of the case internal oil passage 16.
- the lubricating oil OL in the case internal oil passage 16 flows from the outer diameter side oil passage 161 through the through hole 815 into the oil passage 85 of the tubular member 8B', and then is discharged from the open end 811c to the connection oil passage 163'. be done.
- the oil passage 85 of the tubular member 8B' becomes a part of the in-case oil passage 16.
- the flow of the lubricating oil OL in the in-case oil passage 16 can be smoothly changed.
- the chain-type continuously variable transmission 1 in which the endless annular member is the chain 43 is exemplified, but it is not limited to this aspect.
- a belt-type continuously variable transmission in which the endless annular member is a belt examples include those in which a plurality of plate-like elements are laminated and arranged in an annular shape. Specifically, the element has slits on both sides. The belt is constructed by binding each of the elements with an annular ring having a slit extending therethrough.
- the case where the hydraulic actuator is a chain-type continuously variable transmission for a vehicle has been exemplified, but it is not limited to this aspect. Any hydraulic device having an oil passage in a case can be applied to a device other than a vehicle.
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Abstract
Description
油路の一部は、ケースに開口している。油路の開口は、封止部材により封止される。
油圧作動装置において、部品点数の増加の低減が求められている。
ケースと、
前記ケースに設けられた油路と、
前記ケースに設けられると共に、被支持部材を支持する支持部材と、を有する油圧作動装置であって、
前記油路は、当該油路と前記ケース内の空間とを連通する開口部を有し、
前記支持部材は、前記開口部に挿入されており、
前記油路と前記ケース内の空間との連通は、前記支持部材によって遮断されている。
無段変速機1では、エンジン(図示せず)の回転駆動力が、トルクコンバータ2と前後進切替機構3とを介して、バリエータ4に入力される。回転駆動力は、バリエータ4で変速されたのち、リダクションギア5と差動装置6とを介して駆動輪(図示せず)に伝達される。
プライマリプーリ41とセカンダリプーリ42は、互いに平行な回転軸X1、X2回りに回転可能に設けられている。
固定プーリ411と可動プーリ415は、回転軸X1の径方向に延びるシーブ部412、416を有している。これらシーブ部412、416は、互いに対向するシーブ面412a、416aを有する。シーブ面412a、416aは、回転軸X1に対して傾斜している。
プライマリプーリ41では、可動プーリ415の回転軸X1方向の変位により、V溝の溝幅が変更されて、プライマリプーリ41におけるチェーン43の巻き掛け半径が変更される。
固定プーリ421と可動プーリ425は、回転軸X2の径方向に延びるシーブ部422、426を有している。これらシーブ部422、426は、互いに対向するシーブ面422a、426aを有する。シーブ面422a、426aは、回転軸X2に対して傾斜している。
セカンダリプーリ42では、可動プーリ425の回転軸X2方向の変位により、V溝の溝幅が変更されて、セカンダリプーリ42におけるチェーン43の巻き掛け半径が変更される。
このとき、プライマリプーリ41とセカンダリプーリ42におけるチェーン43の巻き掛け半径を変更することで、プライマリプーリ41に入力された回転駆動力が変速されて、セカンダリプーリ42に伝達される。
変速機ケース10は、コンバータハウジング11と、ケース12と、サイドカバー13と、から構成される。これらコンバータハウジング11とケース12とサイドカバー13は、回転軸X1方向で順番に重ね合わせられている。
図3は、ケース12をサイドカバー13側から見た正面図である。
図4は、ケース12をコンバータハウジング11側から見た正面図である。
なお、図3では、バリエータ4を仮想線で記載してある。また、図4では、前後進切替機構3、リダクションギア5及びファイナルギア60を仮想線で記載してある。
図3では、サイドカバー13との接合面の位置を判り易くするために、接合面にハッチングを付して示している。図4では、コンバータハウジング11との接合面と、弧状壁123、124の位置を判り易くするために、接合面と、弧状壁123、124とにそれぞれハッチングを付して示している。
プライマリプーリ41とセカンダリプーリ42との間の領域では、チェーン43は、シーブ面412a、416a(図1参照)、またはシーブ面422a、426a(図1参照)に接触していないため、振れやすい。そこで、無段変速機1は、チェーン43の振れを低減するためのチェーンガイド9A、9B(図5参照)を備えている。
なお、図5は、図3の仮想線で示したバリエータ4に対応している。また、図5では、説明の便宜上、一方のチェーンガイド9Aを断面の模式図で示すと共に、他方のチェーンガイド9Bを側面図で示している。また、チェーン43を簡略的に表記している。
チェーンガイド9A、9Bは、直線Lm1を挟んで対称となる位置関係で配置されている。直線Lm1は、プライマリプーリ41の回転軸X1と、セカンダリプーリ42の回転軸X2とを結ぶ線である。
チェーンガイド9Aとチェーンガイド9Bは、鉛直線VL方向で、直線Lm1の上側と下側にそれぞれ配置されている。鉛直線VLは、無段変速機1の車両への搭載状態を基準とした線である。
回転軸X1、X2方向から見て、チェーンガイド支持軸7A、7Bは、チェーン43の内側に配置されている。チェーンガイド支持軸7A、7Bは、後記するチューブ状部材8A、8Bでそれぞれ支持されている。
図7は、チューブ状部材8Bを説明する斜視図である。
図8は、チューブ状部材8Bを説明する図であり、図7のチューブ状部材8Bを長手方向に沿って切断した断面の模式図である。
図9は、チューブ状部材8Bを説明する図であり、図8のA-A断面の模式図である。
図10は、空間S1内におけるチューブ状部材8A、8Bの配置を説明する図であり、図5におけるA-A断面の模式図である。
ガイド部材91Rのガイド部910Ra、910Rbと接続部911Rは、同一の材料から一体に形成されている。ガイド部910Ra、910Rbは、チェーン43の長手方向に沿って配置された板状部材である。接続部911Rは、ガイド部910Ra、910Rbの長手方向の中央部同士を接続している。
ガイド部材91Lのガイド部910La、910Lbと接続部911Lは、同一の材料から一体に形成されている。ガイド部910La、910Lbは、チェーン43の長手方向に沿って配置された板状部材である。接続部911Lは、ガイド部910La、910Lbの長手方向の中央部同士を接続している。
チェーン43は、ガイド部材91Rのガイド部910Ra、910Rb及び接続部911Rと、ガイド部材91Lのガイド部910La、910Lb及び接続部911Lとで囲まれた空間内に配置される。
図6に示すように、チェーンガイド支持軸7Bは、回転軸X1、X2に平行な軸線Lx2に沿う向きに配置された一本の軸状部材である。チェーンガイド支持軸7Bは、小径軸部70と、大径軸部71とを有している。
支持板711は、大径軸部71の外周から、軸線Lx2の径方向外側に延出している。支持板711は、軸線Lx2周りの周方向の全周に亘って大径軸部71を囲んでいる(図6参照)。
図7に示すように、チューブ状部材8Bは、一本の鋼管を長手方向における一端と他端の間において2か所で屈曲させて形成したものである。
具体的には、図8に示すように、チューブ状部材8Bは、軸線Lx2に沿う向きに配置された第1筒状部80と、軸線Lx3に沿う向きに配置された第2筒状部81と、を有している。軸線Lx3は軸線Lx2に平行である。これら第1筒状部80と第2筒状部81は、筒状の接続部82を介して接続されている。第1筒状部80は、チューブ状部材8Bの長手方向における一端8a側(図中、左側)に位置し、第2筒状部81は、他端8b側(図中、右側)に位置する。
筒壁部801は、底壁部802から軸線Lx2方向における他方側(図中、右側)に延びている。筒壁部801は、軸線Lx2方向における他方側で、接続部82に接続している。
筒壁部811は、直線Lp方向におけるブラケット813の一方側(図中、上側)に位置している。直線Lp方向におけるブラケット813の他方側(図中、下側)には、当該ブラケット813を厚み方向に貫通する貫通孔813aが形成されている。
また、チューブ状部材8Bの第2筒状部81が、中間壁部125に形成された挿入孔128に挿入される。第2筒状部81は、軸線Lx3方向から挿入孔128に挿入される。ボス部129が、ケース12の中間壁部125に形成されている。ブラケット813は、軸線Lx3に平行な軸線Lx4方向からボス部129にボルトBで固定される。
挿入孔128とボス部129は、中間壁部125における直線Lm1よりも下側に形成されている(図11参照)。
すなわち、チューブ状部材8Bとチェーンガイド支持軸7Bとの関係において、チューブ状部材8Bが支持部材を構成し、チェーンガイド支持軸7Bが被支持部材を構成する。
以下の説明では、チェーンガイド支持軸7Aのうち、チェーンガイド支持軸7Bと異なる部分について説明する。チェーンガイド支持軸7Bと共通する部分については同じ符号を用いて説明する。
チューブ状部材8Aは、一本の鋼管を長手方向における一端と他端の間において2か所で屈曲させて形成したものであり、前記したチューブ状部材8Bと同じ基本形状を有している。
以下の説明では、チューブ状部材8Aのうちチューブ状部材8Bと異なる部分について説明する。チューブ状部材8Bと同じ部分については、同じ符号を用いて説明する。
これらケース内油路15、16は、ファイナルギア60(図4参照)の回転によって掻き上げられたケース12内の潤滑油OLを、ケース12内の所定の領域に供給するため潤滑油路である。
図10に示すように、ケース内油路15は、中間壁部125内を軸線Lx6方向に延びている。軸線Lx6方向におけるケース内油路15の他端15bは、前記した空間S2側の弧状壁123(図4参照)に開口している。軸線Lx6方向におけるケース内油路15の一端15aには、挿入孔126が接続されている。
従って、ケース内油路15は、チューブ状部材8Aの油路85と、チェーンガイド支持軸7Aの油路75とを介して、サイドカバー13の油路135と連通している。
ケース内油路16は、中間壁部125に設けられたリブ18(図2参照)内に形成されている。リブ18は、中間壁部125から回転軸X1、X2方向における空間S1側(図2における紙面手前側)に膨出している。
図12は、リブ18内に形成されたケース内油路16を説明する図であり、図11におけるA-A断面の模式図である。
図13は、チューブ状部材8Bの配置を説明する図である。
なお、図12では、チューブ状部材8Bを仮想線で記載してある。また、図12、図13では、デフ室R2のファイナルギア60は省略してある。
回転軸X4方向から見て、ケース内油路16は、デフ室R2と重なる領域を回転軸X4の径方向に延びている。なお、図4では、ケース内油路16の位置を破線で示している。
挿入孔128は、回転軸X4方向における外径側油路161と反対側(図12における下側)の端部が、中間壁部125(リブ18)の表面に開口している。ケース内油路16の外径側油路161は、挿入孔128を介して空間S1と連通している。挿入孔128は、ケース内油路16の一部を構成する。
接続油路163は、リブ18内を直線Lr方向(図12における左右方向)に延びている。接続油路163の他端163bは、環状壁121の外部に向けて開口している。この他端163bの開口は、埋栓Hsで封止されている。埋栓Hsは、例えば公知のホロセット等が挙げられる。
内径側油路162は、回転軸X4の径方向で外径側油路161よりも内径側に位置している。内径側油路162は、回転軸X4方向に延びると共に、他端162bがデフ室R2(図4参照)に開口している。
直線Lsに対する直線Lrの傾きは、前記したチューブ状部材8Bのブラケット813における、直線Lpに対する直線Lqの傾き(図9参照)と同じである。
また、図12に示すように、回転軸X4方向におけるリブ18の表面と直線Lrとの距離はT2に設定されている。この距離T2は、前記したチューブ状部材8Bのブラケット813と貫通孔815との距離T1(図7参照)と同じである(T2=T1)。
そして、図11の拡大領域に示すように、第2筒状部81を挿入孔128に挿入した状態で、ブラケット813がボス部129に固定される。ブラケット813の長手方向に沿う直線Lp(図9参照)が、挿入孔128とボス部129を結ぶ直線Lsと一致する位置に配置される。
この状態において、第2筒状部81の中心と貫通孔815とを結ぶ直線Lq(図9参照)が、接続油路163の中心を通る直線Lrと一致する。
これにより、第2筒状部81の内部空間が、貫通孔815を介して、接続油路163と連通する。よって、チューブ状部材8B内の油路85は、貫通孔815を介して、接続油路163と連通する(図13の拡大領域参照)。
接続油路163の他端163bは、埋栓Hsで封止されている。従って、接続油路163を移動する潤滑油OLは、埋栓Hsによって向きが変えられて、一端162aから内径側油路162内に移動する。
図11に示すように、本実施形態では、挿入孔126、128や、接続油路163の他端163b側(図12参照)が、ケース内油路15、16の開口部に相当する。
一方、ケース内油路16は、潤滑油OLをデフ室R2に戻すために使用される。潤滑油OLを確実にデフ室R2に戻すために、ケース内油路16の開口部となる挿入孔128及び接続油路163の他端163b側は、封止部材で封止される。
すなわち、チューブ状部材8Bは支持部材としての機能と、埋栓としての機能とを兼ねている。挿入孔128を封止するための埋栓を別途用いなくても良い。
(1)無段変速機1は、
ケース12と、
ケース12に設けられたケース内油路16(油路)と、
ケース12に設けられると共に、チェーンガイド支持軸7B(被支持部材)を支持するチューブ状部材8B(支持部材)と、を有する。
ケース内油路16は、当該ケース内油路16とケース12内の空間S1とを連通する挿入孔128(開口部)を有する。
チューブ状部材8Bは、挿入孔128に挿入されている。
ケース内油路16とケース12内の空間S1との連通は、チューブ状部材8Bによって遮断されている。
これにより、チェーンガイド支持軸7Bを支持する支持部材と、挿入孔128を封止する埋栓とをそれぞれ用いなくても良い分、部品点数が削減される。
そこで、上記のように構成すると、チューブ状部材8Bに付与されるボルトBの締結力は、潤滑油OLから受ける圧力に抗する方向となる。
これにより、チューブ状部材8Bが挿入孔128から抜けることを防止し、チューブ状部材8Bによる挿入孔128のシール性を向上できる。
ケース内油路16に設けられた挿入孔128は、チューブ状部材8Bで封止されている。
そこで、上記ように構成すると、ファイナルギア60の回転によって掻き上げられた潤滑油OLを確実にデフ室R2に戻しつつ、部品点数が増加することを低減できる。
一対のプーリを構成するプライマリプーリ41、セカンダリプーリ42と、
これらプライマリプーリ41とセカンダリプーリ42とに巻きかけられたチェーン43(無端環状部材)と、を有している。
チェーンガイド支持軸7Bに連結されたチェーンガイド9Bは、チェーン43をガイドするガイド部材である。
チューブ状部材8Bは、チェーンガイド9Bに連結するチェーンガイド支持軸7Bを支持する。
チューブ状部材8Bは、第2筒状部81の筒壁部811(側壁)に、当該筒壁部811を貫通する貫通孔815が形成されている。
チューブ状部材8Bは、第2筒状部81の開口端811c側から挿入孔128に挿入されていると共に、貫通孔815が、ケース内油路16の接続油路163と連通している。
ケース内油路16内の潤滑油OLは、外径側油路161から開口端811cを通ってチューブ状部材8Bの油路85(内部空間)に流入したのち、貫通孔815から接続油路163に排出される。
また、チューブ状部材8を挿入孔128に深く挿入しても、潤滑油OLの流れを妨げない。これにより、チェーンガイド支持軸7Bを支持するための支持強度を向上できる。
ケース12と、
ケース12に設けられたケース内油路16と、
ケース12に設けられると共に、チェーンガイド支持軸7Bを支持するチューブ状部材8Bと、を有する。
ケース内油路16は、当該ケース内油路16とケース12内の空間S1とを連通する挿入孔128を有する。
チューブ状部材8Bは、挿入孔128に挿入されている。
チューブ状部材8Bは、ケース内油路16とケース12内の空間S1との連通を遮断しつつ、ケース12で支持される。
これにより、チェーンガイド支持軸7Bを支持する支持部材と、挿入孔128を封止する埋栓とをそれぞれ用いなくても良い分、部品点数が削減される。
変形例にかかる無段変速機1Aでは、本実施形態にかかる無段変速機1と異なる部分のみを説明する。
チューブ状部材8B’は、一本の鋼管を長手方向における一端と他端の間において1か所で屈曲させて形成したものであり、略L字形状を成している。
具体的には、チューブ状部材8B’は、直線Lx2に沿う向きに配置された第1筒状部80と、直線Lr’に沿う向きに配置された第2筒状部81’と、を有している。
(5)チューブ状部材8B’は、有底筒状を成している。
チューブ状部材8B’は、第2筒状部81’の筒壁部811(側壁)に、当該筒壁部811を貫通する貫通孔815が形成されている。
チューブ状部材8B’は、第2筒状部81の開口端811c側から挿入孔128Aに挿入されていると共に、貫通孔815が、ケース内油路16の外径側油路161と連通している。
ケース内油路16内の潤滑油OLは、外径側油路161から貫通孔815を通ってチューブ状部材8B’の油路85に流入したのち、開口端811cから接続油路163’に排出される。
1A 無段変速機(油圧作動装置)
12 ケース
128 挿入孔(開口部)
128A 挿入孔(開口部)
16 ケース内油路
41 プライマリプーリ
42 セカンダリプーリ
43 チェーン(無端環状部材)
7B チェーンガイド支持軸(被支持部材)
8B チューブ状部材(支持部材)
8B’ チューブ状部材(支持部材)
9B チェーンガイド(ガイド部材)
802 底壁部
811 筒壁部
811c 開口端
815 貫通孔
85 油路(内部空間)
B ボルト(締結部材)
Lx3 軸線(挿入方向)
OL 潤滑油
S1 空間
Claims (5)
- ケースと、
前記ケースに設けられた油路と、
前記ケースに設けられると共に、被支持部材を支持する支持部材と、を有する油圧作動装置であって、
前記油路は、当該油路と前記ケース内の空間とを連通する開口部を有し、
前記支持部材は、前記開口部に挿入されており、
前記油路と前記ケース内の空間との連通は、前記支持部材によって遮断されている、油圧作動装置。 - 請求項1において、
前記支持部材は、当該支持部材を前記油路の開口部に挿入する方向に沿う押圧力が付与された状態で、締結部材によってケースに固定されている、油圧作動装置。 - 請求項1または2において、
前記油路は、潤滑油を供給する潤滑油路である、油圧作動装置。 - 請求項1~3のいずれか1において、
前記油圧作動装置は、無段変速機であって、
前記無段変速機は、
一対のプーリと、
前記一対のプーリに巻きかけられた無端環状部材と、を有しており、
前記被支持部材は、前記無端環状部材をガイドするガイド部材であり、
前記支持部材は、前記ガイド部材を支持する、油圧作動装置。 - 請求項1~4のいずれか1において、
前記支持部材は、有底筒状を成しており、
前記支持部材の側壁には、当該側壁を貫通する貫通孔が形成されており、
前記支持部材は、開口端側から前記油路の開口部に挿入されていると共に、前記貫通孔が、前記油路と連通しており、
前記油路内の油は、前記開口端または前記貫通孔のいずれか一方から前記支持部材の内部空間に流入したのち、前記開口端または前記貫通孔の他方から前記油路に排出される、油圧作動装置。
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JP2016130541A (ja) * | 2015-01-13 | 2016-07-21 | トヨタ自動車株式会社 | ベルト式無段変速機の潤滑装置 |
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JP2015117723A (ja) * | 2013-12-17 | 2015-06-25 | 本田技研工業株式会社 | チェーン式無段変速装置 |
JP2016130541A (ja) * | 2015-01-13 | 2016-07-21 | トヨタ自動車株式会社 | ベルト式無段変速機の潤滑装置 |
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