JP6645216B2 - Lubricating oil supply device - Google Patents

Description

  The present invention relates to a lubricating oil supply device that supplies lubricating oil to an oil passage formed inside a rotating shaft.

  For example, in a transmission, there is known a technique in which an oil passage for circulating lubricating oil is formed at the center of a rotating shaft, and the lubricating oil is supplied to surrounding parts using the oil passage.

  Also, there is a technology in which an oil catcher for collecting the surrounding lubricating oil is provided on the rotating shaft, and the lubricating oil around the rotating shaft is collected by the oil catcher and supplied to an oil passage formed on the rotating shaft. Are known.

  For example, when the periphery of the oil catcher is surrounded by the annular housing, the lubricating oil rotates with the rotation of the oil catcher in the housing, and the efficiency of collecting the lubricating oil by the oil catcher is deteriorated. There was a problem.

  To cope with this problem, a technique is known in which a concave portion is formed on the inner peripheral surface of the housing to prevent the lubricating oil from being entrained, thereby improving the efficiency of collecting the lubricating oil. Reference 1).

JP-A-2003-42273

  According to the technique described in Patent Literature 1, the lubricating oil existing inside the housing can be effectively supplied to the oil passage formed on the rotating shaft. However, if the amount of lubricating oil present inside the housing is not sufficient, it is impossible to supply an amount of lubricating oil necessary for lubrication to the oil passage.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a technique capable of more effectively supplying lubricating oil to an oil passage formed in a rotating shaft.

In order to achieve the above object, a lubricating oil supply device according to one aspect of the present invention is a lubricating oil supply device that supplies lubricating oil to an oil passage formed inside a rotary shaft, such that the lubricating oil supply device can rotate integrally with the rotary shaft. Connected, collecting the lubricating oil from the surroundings, a collecting portion capable of supplying to the oil path, and a housing member having a surface surrounding the radial outside of the rotation axis of the rotating space in which the collecting portion rotates, the part of the surface of the rotating space side of the accommodating member is formed one or more recesses radially recessed outwardly in the upper part of the housing member, savings reservoir capable reservoir lubricating oil is formed, reservoir the supply can be through-hole is formed a lubricating oil savings reservoir into the recess.

  In the above-mentioned lubricating oil supply device, the storage part may have a shape whose upper part is open.

  In the lubricating oil supply device, the length of the storage portion in the axial direction may be longer than the length of the collection portion in the axial direction.

  In the lubricating oil supply device, the housing member may be a bearing holding member that holds a bearing that rotatably supports the rotating shaft.

Further, in the lubricating oil supply device, the housing member may have a plurality of concave portions, and the storage portion may have a plurality of through holes capable of supplying lubricating oil to each of the concave portions.

  In the above-mentioned lubricating oil supply device, both sides in the axial direction of the rotating space of the collecting section may be configured to prevent leakage of the lubricating oil from the rotating space to both sides in the axial direction.

  In the lubricating oil supply device, the rotation shaft may be a power transmission rotation shaft provided in the transmission.

  ADVANTAGE OF THE INVENTION According to this invention, lubricating oil can be more effectively supplied to the oil path formed in the rotating shaft.

FIG. 1 is a sectional view of a part of a transmission according to an embodiment of the present invention. FIG. 2 is a perspective view of a bearing holder according to one embodiment of the present invention. FIG. 3 is a sectional view of the lubricating oil supply device according to one embodiment of the present invention.

  Hereinafter, a transmission including a lubricating oil supply device according to an embodiment of the present invention will be described with reference to the accompanying drawings. The same components are denoted by the same reference numerals, and have the same names and functions. Therefore, detailed description thereof will not be repeated.

  FIG. 1 is a sectional view of a part of a transmission according to an embodiment of the present invention.

  The transmission 1 is a dual clutch type transmission including a first clutch and a second clutch (not shown). The transmission 1 has a first input shaft 10 (rotating shaft) to which power from the engine is input via a first clutch (not shown) and a second input shaft 10 (rotary shaft) to which power from the engine is input via a second clutch (not shown). It has an input shaft 11 and an output shaft 12 arranged coaxially with the first input shaft 10. The first input shaft 10 is rotatably inserted into a hollow shaft penetrating the second input shaft 11 in the axial direction. The output end of the output shaft 12 is connected to a propeller shaft connected to a vehicle drive wheel (not shown) via a differential device or the like.

  The second input shaft 11 is rotatably supported by a bearing 40 fixed to the transmission case 2. The first input shaft 10 is rotatably supported by a bearing 41 fixed to the bearing holder 20 (accommodating member, bearing holding member). The bearing holder 20 is fixed to the transmission case 2 by bolts (not shown).

  The first input shaft 10 has, at its center, an oil passage 10A through which lubricating oil can flow, and an introduction passage communicating with the oil passage 10A from the outer peripheral surface of the first input shaft 10 to supply the lubricating oil to the oil passage 10A. 10B are formed.

  An oil impeller (collecting unit) 30 is fixed to the first input shaft 10 on the X direction side of a portion supported by the bearing 41 so as to be integrally rotatable. By rotating, the oil impeller 30 collects the lubricating oil present in the rotating space (rotating space) S from a collecting port (33, 34: see FIG. 3) described later, and via the introduction path 10B. The oil is supplied to the oil passage 10A. Here, the lubricating oil supply device 3 includes the first input shaft 10, the bearing holder 20, and the oil impeller 30.

  The outside of the rotation space S in the radial direction of the first input shaft 10 is surrounded by the inner peripheral surface 25 of the bearing holder 20. In the present embodiment, the leakage preventing members 35 and 36 are provided on both sides (X and Y directions) of the rotating space S in the axial direction, and the communication with the spaces on both sides of the rotating space S in the axial direction is shut off, so that lubrication is achieved. Oil is prevented from leaking from the rotation space S to both sides in the axial direction.

  On the upper side of the bearing holder 20, an upper portion is opened, and a storage portion 21 that can store the lubricating oil that has been splashed up to the inside of the transmission 1 is formed. The axial length of the storage portion 21 is longer than the axial length of the oil impeller 30. Therefore, it is possible to effectively collect the lubricating oil jumped up to the surroundings.

  The storage section 21 is disposed at a position where at least a part thereof overlaps with the gear 11A provided on the second input shaft 11 in the axial direction. Thereby, the lubricating oil jumped up by the gear 11A and the gear (not shown) meshing with the gear 11A can be effectively collected in the storage section 21.

  A through hole 22 communicating with the rotating space S is formed at the bottom of the storage section 21. Thereby, the lubricating oil stored in the storage part 21 is sequentially introduced into the rotating space S through the through hole 22.

  The output shaft 12 is formed at its center with an oil passage 12A through which lubricating oil can flow. The oil passage 10A of the first input shaft 10 and the oil passage 12A of the output shaft 12 are connected by a connection passage 13. Therefore, the lubricating oil supplied to the oil passage 10A by the oil impeller 30 is supplied to the oil passage 12A via the connection passage 13.

  Next, the bearing holder 20 will be described in detail.

  FIG. 2 is a perspective view of a bearing holder according to one embodiment of the present invention.

  The bearing holder 20 is made, for example, by integral molding, and accommodates a storage portion 21 for temporarily storing the lubricating oil that has been splashed upward, the first input shaft 10, the bearing 41, and the oil impeller 30. And a receiving hole 23. The storage unit 21 has a plurality of (four in FIG. 2) partitioned partial storage units 21A to 21D. A concave portion 26 that is concave in the radial direction is formed on the inner peripheral surface 25 facing the oil impeller 30 housed in the housing hole 23. The recess 26 is formed with a through hole 22 that communicates with any of the partial storage sections 21A to 21D.

  Next, the lubricating oil supply device 3 will be described in detail.

  FIG. 3 is a sectional view of the lubricating oil supply device according to one embodiment of the present invention. FIG. 3 is a cross-sectional view of the transmission 1 taken along line AA in FIG.

  The lubricating oil supply device 3 includes a first input shaft 10, a bearing holder 20, and an oil impeller 30.

  The first input shaft 10 rotates in a direction (counterclockwise direction) indicated by a thick solid line arrow in the figure.

  The oil impeller 30 has a first blade 31 and a second blade 32. A first collection port 33 is formed at the head of the first impeller 31 of the oil impeller 30 in the rotation direction, and a second collection port 34 is formed at the top of the rotation of the second blade 32 in the rotation direction. Have been.

  When the oil impeller 30 rotates, the lubricating oil collected from the first collection port 33 relatively flows on the inner peripheral side of the first blade portion 31 as indicated by a dashed arrow, and is collected from the second collection port 34. It merges with the collected lubricating oil, flows on the inner peripheral side of the second blade portion 32, flows into the introduction path 10B of the first input shaft 10, and flows into the oil path 10A of the first input shaft 10.

  The inner peripheral surface 25 of the bearing holder 20 faces the oil impeller 30 and is a surface that surrounds the radial outside of the rotation space S of the oil impeller 30. The innermost diameter of the inner peripheral surface 25 is substantially the same as the maximum outer diameter of the oil impeller 30. On a part of the inner peripheral surface 25, a concave portion 26 that is concave in the outer radial direction is formed. In the present embodiment, two concave portions 26 (26A, 26B) are formed in the inner peripheral surface 25. The concave portion 26 is formed, for example, in a range including a position higher than the height of the axis center of the first input shaft 10.

  The concave portion 26A communicates with the partial storage portion 21A via the through hole 22. In addition, the concave portion 26B communicates with the partial storage portion 21D via the through hole 22. Therefore, the lubricating oil stored in the partial storage portions 21A and 21D is sequentially supplied to the concave portion 26. Therefore, before the collecting port (the first collecting port 33 or the second collecting port 34) reaches the vicinity of the concave portion 26, the lubricating oil accumulated in the concave portion 26 is located in front of the collecting port in the rotating space S. Flows into the space. In the present embodiment, since the lubricating oil is configured not to leak from the rotating space S to both axial sides of the first input shaft 10, most of the lubricating oil supplied to the rotating space S is supplied to the oil impeller. 30 will be collected. Therefore, the amount of lubricating oil collected by the oil impeller 30 increases, and a large amount of lubricating oil can be supplied to the oil passage 10A.

  Further, the through holes 22 formed in the partial storage portions 21B and 21C communicate with the rotating space S at a position higher than the concave portion 26. Therefore, the lubricating oil stored in the partial storage portions 21B and 21C flows into the rotation space S and is collected by the oil impeller 30, or flows along the inner peripheral surface 25 to the lower concave portion 26. Therefore, the amount of lubricating oil in the rotating space S can be effectively increased, and the amount of lubricating oil collected by the oil impeller 30 can be increased.

  As described above, according to the lubricating oil supply device according to one embodiment of the present invention, the lubricating oil storage device 21 is provided, and a part of the inner peripheral surface 25 of the bearing holder 20 on the rotation space S side is provided. Since the concave portion 26 is provided and the through hole 22 is formed so that the lubricating oil is supplied from the storage portion 21 to the concave portion 26, the lubricating oil can be sequentially supplied to the concave portion 26, and A large amount of lubricating oil can be supplied, and the amount of lubricating oil collected by the oil impeller 30 can be effectively increased. Thereby, the amount of lubricating oil supplied to the oil passage 10A of the first input shaft 10 can be effectively increased.

  The present invention is not limited to the above-described embodiment, and can be appropriately modified and implemented without departing from the spirit of the present invention.

  For example, the configuration of the oil impeller is not limited to the above-described example, and any configuration may be used as long as it can supply the lubricating oil in the rotation space S to the introduction path 10B.

  Further, in the above embodiment, the leakage preventing members 35 and 36 are provided as members for preventing the leakage of the lubricating oil to both sides in the axial direction of the rotation space S. However, the member adjacent to the oil impeller 30 prevents the leakage. It is not necessary to provide at least one of the leakage prevention members 35 and 36 as long as it has a function of preventing leakage. For example, if the bearing 41 has a function (sealing function) for preventing leakage of lubricating oil in the axial direction, the leakage prevention member 36 on the bearing 41 side may not be provided. If the amount of leakage of the lubricating oil to both sides in the axial direction in the case where the leakage preventing members 35 and 36 are not provided is smaller than the amount of the lubricating oil supplied to the rotating space S from the through hole 22, the leakage The prevention members 35 and 36 need not be provided.

  In the above embodiment, two concave portions 26 are provided. However, the present invention is not limited to this, and only one concave portion may be provided, or three or more concave portions may be provided.

DESCRIPTION OF SYMBOLS 1 Transmission 2 Transmission case 3 Lubricating oil supply device 10 1st input shaft 10A oil path 10B introduction path 11 2nd input shaft 12 output shaft 12A oil path 13 connection path 20 bearing holder 21 storage part 22 through-hole 23 accommodation hole 25 Inner peripheral surface 26, 26A, 26B Recess 30 Oil impeller 31 First blade 32 Second blade 33 First collection port 34 Second collection port 35, 36 Leakage prevention member 40, 41 Bearing

Claims (7)

In a lubricating oil supply device that supplies lubricating oil to an oil passage formed inside the rotating shaft,
A collecting unit that is connected to the rotating shaft so as to be integrally rotatable, collects lubricating oil from the surroundings, and can supply the lubricating oil to the oil passage;
A housing member having a surface surrounding a radially outer side of the rotation axis of the rotation space in which the collection unit rotates,
One or more recesses recessed outward in the radial direction are formed in a part of the surface of the housing member on the rotation space side,
At the top of the housing member, the lubricating oil savings reservoir capable reservoir is formed,
Wherein the reservoir has a lubricating oil supply device for a lubricating oil savings reservoir can be supplied through holes in the recess is formed. The lubricating oil supply device according to claim 1, wherein the storage portion has a shape in which an upper portion is opened. The lubricating oil supply device according to claim 2, wherein an axial length of the rotating shaft of the storage portion is longer than an axial length of the collecting portion. The lubricating oil supply device according to any one of claims 1 to 3, wherein the housing member is a bearing holding member that holds a bearing that rotatably supports the rotating shaft. A plurality of recesses are formed in the housing member,
5. The lubricating oil supply device according to claim 1, wherein a plurality of through holes capable of supplying lubricating oil to each of the concave portions are formed in the storage section . 6. The axial direction both sides of the rotating shaft of the rotation space of the collection part are configured to prevent the leakage of the lubricating oil from the rotation space to both sides in the axial direction. The lubricating oil supply device according to any one of Claims 5 to 5. The lubricating oil supply device according to any one of claims 1 to 6, wherein the rotating shaft is a rotating shaft for power transmission provided in a transmission.

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