JP2020003013A - Flow rate adjustment member and lubrication structure of gear device having flow rate adjustment member - Google Patents

Abstract

To efficiently distribute a lubricant to an oil path in a radial direction from an oil path in an axial direction in a shaft.SOLUTION: A flow rate adjustment member 10 of a shaft 53 having a flow passage 40 in an axial direction and a plurality of flow passages 41, 42, 43 and 44 in a radial direction has a cylindrical main body part 11 which is inserted and arranged in the flow passage 40 in the axial direction in a state that its external peripheral face is in contact with an internal peripheral face of the flow passage 40 in the axial direction. A recess 14 recessed to the inside in the radial direction and partitioning a flow passage space in the flow passage 40 in the axial direction into a first flow passage space part A and a second flow passage space part B is formed at a cylinder part facing the flow passages 41, 42, 43 and 44 in the radial direction of the main body part 11, and insertion holes 20, 21 for making the first flow passage space part A and the second flow passage space part B communicate with each other are formed in the recess 14.SELECTED DRAWING: Figure 2

Description

  The present disclosure relates to a flow rate adjusting member and a lubrication structure of a gear device including the flow rate adjusting member.

  Generally, in a gear device such as a transmission, lubricating oil is supplied to the meshing element and the sliding element in order to reduce wear generated on the meshing element and the sliding element.

  For example, in Patent Documents 1 and 2, a plurality of radial oil passages and an axial oil passage communicating with these radial oil passages are provided inside the shaft, and the axial oil passages are provided via the radial oil passages. There is disclosed a structure in which a meshing element and a sliding element disposed around a shaft are lubricated by discharging lubricating oil.

JP 2018-40377 A JP 2013-185600 A

  By the way, the lubricating oil distributed from the axial oil passage to each radial oil passage has a diameter located upstream with respect to the lubricating oil flow direction in the axial oil passage due to the effect of centrifugal force accompanying the rotation of the shaft. The distribution amount tends to increase in the direction oil passage. For this reason, the distribution amount of the lubricating oil is reduced to the radial oil passage located on the downstream side, and the lubricating oil for the sliding element and the sliding element disposed around the downstream radial oil passage is reduced. The amount may be insufficient.

  An object of the technology of the present disclosure is to effectively distribute lubricating oil from an axial oil passage in a shaft to a radial oil passage.

  The member of the present disclosure is a flow rate adjusting device that adjusts a fluid flow rate from the axial flow path to the radial flow path of a shaft having an axial flow path and a plurality of radial flow paths communicating with the axial flow path. A member having a cylindrical main body inserted and disposed in the axial flow path with its outer peripheral surface in contact with the inner peripheral surface of the axial flow path, and the radial direction of the main body The cylindrical portion facing the flow path is depressed inward in the radial direction and is separated from the radial flow path, and the flow path space in the axial flow path is a first flow path opposite to the radial flow path. A concave portion is provided for partitioning into a space portion and a second channel space portion on the radial channel side, and the concave portion communicates the first channel space portion and the second channel space portion. Characterized in that a through hole to be provided is provided.

  In addition, the through hole is provided in a portion of the bottom of the concave portion facing the opening of the radial flow channel facing the second flow channel space portion and not overlapping a flow channel axis of the radial flow channel. Is preferred.

  In addition, a plurality of the through holes are provided in the cylinder axis direction, and the opening area of the through hole on the downstream side with respect to the flow direction of the fluid in the axial flow path is larger than the opening area of the through hole on the upstream side. Preferably, it is formed.

  Further, it is preferable that a slit extending in the cylinder axis direction is provided in the cylinder portion of the main body opposite to the concave portion.

  In addition, the shaft has a pin hole that is depressed radially outward from the axial flow path, and the main body has a pin protrusion that protrudes radially outward and can engage with the pin hole. Preferably, it is provided.

  The lubricating structure of the present disclosure is a lubricating structure of a gear device including the flow rate adjusting member, wherein the fluid is lubricating oil sealed in a gear case, and a gear is rotatable relative to the shaft via a bearing. And a synchronizing device that synchronously couples the gear to the shaft is provided, and some of the plurality of radial flow paths supply lubricating oil to the bearing. The other radial flow path supplies lubricating oil to the synchronizer.

  According to the technology of the present disclosure, lubricating oil can be effectively distributed from an axial oil passage in a shaft to a radial oil passage.

It is a typical sectional view showing a part of gear device concerning this embodiment. (A) is a schematic perspective view showing a flow rate adjusting member according to the present embodiment, and (B) is a schematic flow rate adjusting member according to the present embodiment and a schematic diagram showing a shaft cut away in the axial direction. It is sectional drawing. FIG. 3 is a schematic cross-sectional view illustrating a flow rate adjustment member and a shaft according to the embodiment, which are cut out in a radial direction. It is a typical perspective view showing the flow control member concerning other embodiments. FIG. 10 is a schematic cross-sectional view illustrating a flow rate adjustment member and a shaft cut away in a radial direction according to another embodiment. FIG. 10 is a schematic cross-sectional view illustrating a flow rate adjustment member and a shaft cut away in a radial direction according to another embodiment.

  Hereinafter, a lubrication structure of a flow rate adjusting member and a gear device including the flow rate adjusting member according to the present embodiment 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.

[overall structure]
FIG. 1 is a schematic sectional view showing a part of a gear device 50 according to the present embodiment. As shown in the figure, the gear device 50 is, for example, a transmission. A shaft 53 is rotatably supported on a transmission case 51 (an example of a gear case) via a tapered roller bearing 52.

  A plurality of speed change gears 61, 62, 63, 64, 65 are rotatably supported on the shaft 53 via, for example, needle bearings B 1, B 2, B 3, B 4, B 5 (an example of a bearing). . Synchronizing devices 70, 80 and 90 are provided between the transmission gears 61, 62, 63, 64 and 65 for selectively synchronizing them with the shaft 53.

  Synchronizing devices 70, 80, and 90 are provided with hubs 71, 81, 91 provided on shaft 53 so as to be integrally rotatable, and sleeves 72, 82, having inner peripheral teeth always meshing with outer peripheral teeth of hubs 71, 81, 91. 92, dog gears 73, 84, 85, 94, 95 provided integrally rotatable with the transmission gears 61, 62, 63, 64, 65, hubs 71, 81, 91 and dog gears 73, 84, 85, 94. , 95 and synchronizer rings 74, 86, 87, 96, 97.

  When the synchronizer rings 74, 86, 87, 96, 97 are pressed with the shift movement of the sleeves 72, 82, 92, the synchronizers 70, 80, 90 move to the synchronizer rings 74, 86, 87, 96, 97 and the dog gear. Synchronous loads are generated between 73, 84, 85, 94, and 95. When the rotation of the sleeves 72, 82, 92 and the dog gears 73, 84, 85, 94, 95 are synchronized, the sleeves 72, 82, 92 are further shifted to completely mesh with the dog gears 73, 84, 85, 94, 95. Thus, the transmission gears 61, 62, 63, 64, 65 are selectively and synchronously coupled (gear-in) with the shaft 53.

  The shaft 53 has one axial oil passage 40 (axial flow passage) extending in the axial direction of the axis of the shaft 53, and the outer periphery of the shaft 53 extending radially from the axial oil passage 40 in the shaft 53. A plurality of radial oil passages 41, 42, 43, 44, 45, 46 (radial flow passages) are formed on the surface.

  The axial oil passage 40 is a circular hole having an opening 40A at one end (the left end in the figure) of the shaft 53, and lubricating oil supplied from the opening 40A passes through the inside of the axial oil passage 40 at the other end. (Right end side in the figure). In a portion of the shaft 53 adjacent to the opening 40A, a positioning hole 47 (an example of a pin hole) that opens into the axial oil passage 40 is formed to penetrate in the radial direction.

  The radial oil passages 41, 42, 43, 44, 45, 46 are provided in parallel with each other in the radial direction. In other words, the radial oil passages 41, 42, 43, 44, 45, 46 are arranged in parallel in the shaft axis direction.

  Among the radial oil passages 41, 42, 43, 44, 45, 46, the radial oil passage 41 located on the most upstream side with respect to the flow direction of the lubricating oil in the axial oil passage 40 is mainly a transmission gear. The lubricating oil is supplied to the 61 needle bearing B1. The second radial oil passage 42 from the upstream supplies mainly lubricating oil to the needle bearing B2 of the transmission gear 62, and the third radial oil passage 43 from the upstream mainly supplies lubricating oil to the synchronizing device 80. I do. The fourth radial oil passage 44 from the upstream supplies lubricating oil mainly to the needle bearing B3 of the transmission gear 63, and the fifth radial oil passage 45 from the upstream mainly supplies the needle bearing B4 of the transmission gear 64 to the needle bearing B4. Supply lubricating oil. The sixth radial oil passage 46 on the most downstream side mainly supplies the lubricating oil to the synchronizer 90.

  In the present embodiment, a flow rate adjusting member 10 that adjusts the amount of distribution of the lubricating oil to each of the radial oil paths 41, 42, 43, 44, 45, 46 is inserted into the axial oil path 40. Hereinafter, details of the flow rate adjusting member 10 will be described.

[Flow rate adjusting member]
FIG. 2A is a schematic perspective view illustrating the flow rate adjusting member 10 according to the present embodiment, and FIG. 2B is a diagram illustrating the flow rate adjusting member 10 and the shaft 53 in the axial direction according to the present embodiment. It is a typical sectional view cut away and shown.

  As shown in FIG. 2 (A), the flow rate adjusting member 10 is provided with a slit 12 extending in the cylinder axis direction in a main body 11 of a substantially cylindrical body. It is. The flow rate adjusting member 10 is formed such that the outer diameter of the main body 11 is substantially the same as or slightly larger than the inner diameter of the axial oil passage 40 (see FIG. 2B). It is fitted and fixed. When the flow rate adjusting member 10 is fitted into the oil passage 40 in the axial direction, the slit 12 contracts, so that the dimensional tolerance between the outer diameter of the main body 11 and the inner diameter of the oil passage 40 can be effectively absorbed. It has become.

  A positioning projection 13 (an example of a pin projection) that protrudes radially outward is provided at one end 11A of the main body 11 in the cylinder axis direction. The positioning projection 13 engages with the positioning hole 47 (see FIG. 2B) on the shaft 53 side, whereby the positioning and further rotation of the flow rate adjusting member 10 in the axial oil passage 40 are restricted. It has become.

  Between the one end portion 11A and the other end portion 11B in the cylinder axis direction of the main body portion 11, it is formed by depressing the cylinder portion radially opposed to the slit 12 across the cylinder axis inward in the radial direction. A recess 14 is provided.

  The concave portion 14 has a substantially rectangular flat portion 15 extending in the cylinder axis direction and forming the bottom of the concave portion 14, and a pair of substantially semicircular side portions 16 connecting the flat portion 15 and the ends 11 </ b> A and 11 </ b> B. , 17.

  As shown in FIG. 2B, the length of the flat portion 15 in the cylinder axis direction is formed to be longer than the separation distance between the most upstream radial oil passage 41 and the fourth radial oil passage 44. I have. That is, when the flow rate adjusting member 10 is inserted and arranged at a predetermined position in the axial oil passage 40, the flat portion 15 is separated from the openings of the radial oil passages 41, 42, 43 and 44 facing the axial oil passage 40. To face each other.

  In the present embodiment, an upstream oil hole 20 (an example of a through hole) on one end 11A side and a downstream oil hole 21 (an example of a through hole) on the other end 11B side are formed through the flat portion 15. Have been. The number of the oil holes 20 and 21 may be appropriately set according to the length of the flat portion 15 and the number of the radial oil passages 41, 42, 43 and 44.

  The upstream oil hole 20 is provided between the first radial oil passage 41 and the second radial oil passage 42 in the plane portion 15. In other words, the upstream oil hole 20 is formed in the plane portion 15 at a position where the hole axis does not coincide with the flow axis of each of the radial oil passages 41 and 42.

  The downstream oil hole 21 is provided between the third radial oil passage 43 and the fourth radial oil passage 44 in the plane portion 15. In other words, the downstream oil hole 21 is formed in the plane portion 15 at a position where the hole axis does not coincide with the flow axis of each of the radial oil passages 43 and 44. The downstream oil hole 21 is preferably a long hole extending in the cylinder axis direction, and the opening area thereof is formed larger than the opening area of the upstream oil hole 20.

  FIG. 3 is a schematic cross-sectional view showing the flow rate adjusting member 10 and the shaft 53 according to the present embodiment cut off in the radial direction. As shown in the figure, a pair of circular arc portions 18 and 19 whose outer periphery is curved at substantially the same curvature as the inner periphery of the axial oil passage 40 are left at both ends in the circumferential direction of the flat portion 15. . When the flow rate adjusting member 10 is inserted and disposed in the axial oil passage 40, the outer peripheral surfaces of the arc portions 18 and 19 are pressed against the inner peripheral surface of the axial oil passage 40.

  That is, the flow path space of the axial oil passage 40 is defined by the flat portion 15 of the recess 14 and the pair of side surface portions 16 and 17 so that the main flow chamber A on the opposite side to the radial oil passages 41, 42, 43 and 44. (The first flow path space) and the oil distribution chamber B (the second flow path space) on the side of each of the radial oil passages 41, 42, 43, 44. As described above, by dividing the flow path space of the axial oil path 40 into the main flow path chamber A and the oil distribution chamber B, the lubricating oil flowing in the main flow path chamber A in the axial direction is supplied to each of the oil holes 20 and 21. , Flows into the oil distribution chamber B, and is temporarily stored in the oil distribution chamber B, and then distributed to the radial oil passages 41, 42, 43, and 44.

  According to the present embodiment described in detail above, the inside of the axial oil passage 40 is divided into the main flow passage chamber A and the oil distribution chamber B by the concave portion 14 of the flow rate adjusting member 10, and the main flow passage chamber A and the oil distribution chamber B is communicated with the radial oil passages 41, 42, 43, 44 by oil holes 20, 21 whose axes do not coincide with each other. After being temporarily stored in the chamber B, it is configured to be distributed to the respective radial oil passages 41, 42, 43, 44. This makes it possible to prevent the lubricating oil from intensively flowing into the upstream-side radial oil passages 41 and 42 due to the influence of the centrifugal force accompanying the rotation of the shaft 53, and the respective radial oil passages 41 and 42 can be prevented. , 43, and 44 can be effectively distributed with the lubricating oil.

  Further, the downstream oil holes 21 corresponding to the radial oil passages 43 for supplying the lubricating oil to the synchronizer 80 are provided mainly on the upstream side corresponding to the radial oil passages 41 and 42 for supplying the lubricating oil to the needle bearings B1 and B2. By making the opening larger than the oil hole 20, it is possible to stably secure the amount of lubricating oil even for the synchronizing device 80 that requires more lubrication.

  Further, the lubricating oil can be effectively distributed to the radial oil passages 41, 42, 43, 44 only by inserting the flow rate adjusting member 10 in the axial oil passage 40. The lubrication performance of the gear device 50 can be reliably improved without making significant design changes to the shaft 53 for adjusting the hole diameters and the number of holes 42, 43, and 44.

[Others]
Note that the present disclosure is not limited to the above-described embodiments, and can be appropriately modified and implemented without departing from the spirit of the present disclosure.

  For example, as shown in FIG. 4, a plurality of recesses 14 (two in the illustrated example) may be provided in the main body 11 of the flow rate adjusting member 10 in the cylinder axis direction.

  Further, as shown in FIG. 5, when the shaft 53 has two radial oil passages 41, 42, 43, and 44, two concave portions 14 may be provided in the circumferential direction according to these. Alternatively, as shown in FIG. 6, when the shaft 53 has three radial oil passages 41, 42, 43, and 44, three concave portions 14 may be provided in the circumferential direction in accordance with these. In any of these cases, the same operation and effect as the above embodiment can be obtained.

  In addition, the application of the present embodiment is not limited to the transmission 50, and can be widely applied to other gear devices including a gear case for sealing lubricating oil or fluid, such as a differential device.

Reference Signs List 10 Flow rate adjusting member 11 Body part 12 Slit 13 Positioning projection (pin projection)
14 recess 15 flat part (bottom part)
16, 17 Side part 18, 19 Circular part 20 Upstream oil hole (through hole)
21 Downstream oil hole (through hole)
40 Axial oil passage (axial passage)
41, 42, 43, 44 Radial oil path (radial flow path)
47 Positioning hole (pin hole)
50 Transmission (gear device)
51 Transmission case (gear case)
61, 62, 63, 64, 65 Transmission gear (gear)
B1, B2, B3, B4, B5 Needle bearings (bearings)
70,80,90 Synchronizer

Claims (6)

An axial flow path, and a flow rate adjusting member that adjusts a fluid flow rate from the axial flow path to the radial flow path of the shaft having a plurality of radial flow paths communicating with the axial flow path,
A cylindrical body having a cylindrical main body inserted and arranged in the axial flow path with its outer peripheral surface in contact with the inner circumferential surface of the axial flow path, and a cylinder facing the radial flow path of the main body. In the portion, while being depressed radially inward and separated from the radial flow path, a first flow path space portion on the opposite side to the radial flow path, the flow path space in the axial flow path, A concave portion is provided for partitioning into a second flow path space portion on the radial flow path side, and a through hole for communicating the first flow path space portion and the second flow path space portion is provided in the concave portion. A flow regulating member, characterized in that it is made. The through hole is provided in a portion of the bottom of the concave portion facing the opening of the radial flow channel facing the second flow channel space portion and not overlapping a flow channel axis of the radial flow channel. Item 2. The flow rate adjusting member according to Item 1. A plurality of the through holes are provided in the cylinder axis direction, and the opening area of the through hole on the downstream side with respect to the flow direction of the fluid in the axial flow path is formed larger than the opening area of the through hole on the upstream side. The flow rate adjusting member according to claim 1 or 2. The flow rate adjusting member according to any one of claims 1 to 3, wherein a slit extending in a cylinder axis direction is provided in a cylinder portion of the main body opposite to the concave portion. The shaft is provided with a pin hole that is depressed radially outward from the axial flow path, and the main body portion is provided with a pin protrusion that protrudes radially outward and can engage with the pin hole. The flow rate adjusting member according to any one of claims 1 to 4. A lubrication structure for a gear device comprising the flow rate adjusting member according to any one of claims 1 to 5,
The fluid is a lubricating oil sealed in a gear case,
A gear is rotatably supported on the shaft via a bearing so as to be relatively rotatable, and a synchronizing device for synchronizing the gear with the shaft is provided.
A gear device wherein a part of the plurality of radial passages supplies lubricating oil to the bearing, and the other radial passages supplies lubricating oil to the synchronizer. Lubrication structure.

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