JP2018112286A - Lubrication device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lubrication device enabling lubrication inside a transmission case, without increasing the number of components.SOLUTION: A lubrication device includes: an oil pump configured to suction oil accumulated in a storage part of a transmission case, and then discharge it; an oil passage provided inside a wall surface of the transmission case, and where oil discharged from the oil pump circulates; and an injection port connected to the oil passage, and opened to an inner wall surface of the transmission case. The oil passage includes an axial oil passage extending in an axial direction of the transmission case and a circumferential oil passage extending in a circumferential direction of the transmission case. The injection port is provided at plural places.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a lubricating device.

  2. Description of the Related Art Conventionally, there has been known a lubricating device that pumps lubricating oil collected in a storage portion at the bottom of a transmission case with an oil pump and injects the lubricating oil into the transmission case (see, for example, Patent Document 1). In the lubricating device described in Patent Document 1, lubricating oil is circulated using an oil pipe disposed outside the transmission case.

JP-A-7-103318

  However, the lubricating device described in Patent Document 1 has a problem that the number of parts increases because an oil pipe is used to distribute lubricating oil.

  An object of the present invention is to provide a lubrication device that can lubricate the inside of a transmission case without increasing the number of parts.

  The lubrication apparatus according to the present invention includes an oil pump that sucks and discharges oil accumulated in a storage portion in the transmission case, and the oil discharged from the oil pump is provided in a wall surface of the transmission case. An oil oil passage that circulates, and an injection port that is connected to the oil oil passage and opens in an inner wall surface of the transmission case.

  According to the lubricating device according to the present invention, the inside of the transmission case can be lubricated without increasing the number of parts.

1 is a longitudinal sectional view showing a schematic configuration of a transmission equipped with a lubricating device according to an embodiment of the present invention. AA sectional view of FIG. BB sectional view of FIG. Sectional drawing which shows the oil path of a 1st modification Sectional drawing which shows the oil path and injection nozzle of a 1st modification Sectional drawing which shows the oil path of a 2nd modification Sectional drawing which shows the oil path and injection nozzle of a 2nd modification

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In addition, embodiment described below is an example and this invention is not limited by this embodiment.

  First, with reference to FIG. 1, the outline of the transmission 1 in which the lubricating device 100 according to the present embodiment is mounted will be described. In FIG. 1, the front-rear direction and the vertical direction of the transmission 1 are depicted. In the following description, the front side, the rear side, the upper side, and the lower side of the transmission 1 may be simply referred to as “front”, “rear”, “upper”, and “lower”, respectively. In the following description, the front-rear direction of the transmission 1 may be referred to as the “axial direction”.

  The transmission 1 includes a torque converter housing 10, a clutch housing 20, and a transmission case 30.

  The torque converter housing 10 is made of, for example, an aluminum alloy or an iron alloy, and has a bottomed cylindrical shape with an opening at the front. The torque converter housing 10 has an internal space 10a. A torque converter 11 indicated by a two-dot chain line in FIG. 1 is arranged in the internal space 10a.

  The torque converter 11 includes a pump impeller 12, a turbine runner 13, a lockup clutch 14, a stator (not shown), and the like. The pump impeller 12 of the torque converter 11 is connected to an engine (not shown) provided at the front stage of the torque converter 11.

  A torque converter output shaft 15 connected to the turbine runner 13 of the torque converter 11 extends rearward. The torque converter output shaft 15 extends through the rear end wall 10 b of the torque converter housing 10 into the clutch housing 20.

  In FIG. 1, a through hole through which the torque converter output shaft 15 passes, a bearing for bearing the torque converter output shaft 15 with respect to the rear end wall 10b, and the like are omitted. Further, the inside of the torque converter 11 is filled with the clutch operating oil 2.

  The clutch housing 20 is made of, for example, an aluminum alloy or an iron alloy, and has a bottomed cylindrical shape with an opening at the front. Clutch housing 20 is fixed with a bolt to rear end wall 10b of torque converter housing 10 via a flange (not shown) provided in the opening.

  The clutch housing 20 has a sealed internal space 20a. A clutch 21 is disposed in the internal space 20a. The clutch 21 is a hydraulically operated wet multi-plate clutch. The hydraulic oil for the clutch 21 is the same clutch hydraulic oil 2 as the oil filled in the torque converter 11 described above.

  The clutch 21 includes a plurality of input side clutch plates 22, a plurality of output side clutch plates 23, and a piston 24. The input side clutch plate 22 is connected to the torque converter output shaft 15. The output side clutch plate 23 is connected to the input shaft 31. The input shaft 31 passes through the rear end wall 20 b of the clutch housing 20 and extends into the transmission case 30.

  In FIG. 1, a through-hole through which the input shaft 31 passes, a bearing for bearing the input shaft 31 with respect to the rear end wall 20b, and the like are omitted.

  A clutch operating oil reservoir 20 c is provided in the lower part of the internal space 20 a of the clutch housing 20. The clutch operating oil 2 stored in the clutch operating oil reservoir 20c is sucked up by a clutch operating oil pump (not shown), sent to a clutch operating oil passage (not shown), and passes through a clutch operating oil cooler (not shown). By doing so, the temperature is adjusted.

  The clutch operating oil 2 that has passed through the clutch operating oil cooler is supplied to a hydraulic circuit (not shown). A part of the clutch operating oil 2 sent to the hydraulic circuit circulates in the torque converter 11 and returns to the clutch operating oil reservoir 20c. Further, a part of the clutch operating oil 2 sent to the hydraulic circuit is used for the operation and lubrication of the clutch 21, and then returns to the clutch operating oil reservoir 20c.

  The transmission case 30 is made of, for example, an aluminum alloy or an iron alloy, and has a bottomed cylindrical shape with an opening at the front. The transmission case 30 is fixed to the rear end wall 20b of the clutch housing 20 with a bolt via a flange (not shown) provided in the opening.

  The transmission case 30 has a sealed internal space 30a. In the internal space 30 a, an input shaft 31 that penetrates the rear end wall 20 b of the clutch housing 20, a counter shaft 32 that is disposed in parallel with the input shaft 31, and a shaft that is coaxial with the input shaft 31. An output shaft 33 penetrating the rear end wall 30b is disposed.

  In FIG. 1, a through hole through which the output shaft 33 passes, a bearing that supports the output shaft 33 with respect to the rear end wall 30b, and the like are omitted.

  An input gear 31 a is provided on the input shaft 31 so as to rotate integrally with the input shaft 31.

  The counter shaft 32 is provided with an input sub gear 32a that meshes with the input gear 31a so as to rotate integrally with the counter shaft 32. The counter shaft 32 is provided with a first output sub gear 32b, a second output sub gear 32c, and a third output sub gear 32d so as to rotate integrally with the counter shaft 32.

  The output shaft 33 is provided with a first output gear 33 a that meshes with the first output sub-gear 32 b so as to be rotatable relative to the output shaft 33. Further, the output shaft 33 is provided with a second output gear 33 b that meshes with the second output sub-gear 32 c so as to be rotatable relative to the output shaft 33. Further, the output shaft 33 is provided with a third output gear 33 c that meshes with the third output sub gear 32 d so as to be rotatable relative to the output shaft 33.

  Further, the output shaft 33 is provided with a coupling mechanism 34 that selectively rotates the output shaft 33 and any one of the first output gear 33a, the second output gear 33b, and the third output gear 33c. . As such a coupling mechanism 34, a synchronization mechanism using a widely known synchronizer is employed. In addition, the connection mechanism 34 is not limited to the above-mentioned form.

  A gear oil reservoir 30 c is provided in the lower part of the internal space 30 a of the transmission case 30. In the rear end wall 20b of the clutch housing 20, there is embedded an oil pump 3 that sucks up and sends out the gear oil 5 accumulated in the gear oil reservoir 30c.

  The oil pump 3 is rotationally driven by the input shaft 31. The oil pump 3 may be rotationally driven by the counter shaft 32 or may be rotationally driven by another power source. As the oil pump 3, a widely known gear pump, trochoid pump, or the like can be employed. The oil pump 3 is not limited to the above-described type.

  The oil pump 3 sucks up the gear oil 5 accumulated in the gear oil reservoir 30c through a suction oil passage 3a provided in the rear end wall 20b. The gear oil 5 delivered from the oil pump 3 flows through the delivery oil passage 3b provided in the rear end wall 20b and is carried to the upper part of the transmission case 30. A part of the gear oil 5 is supplied to an axial oil passage 40 (details will be described later) provided inside the upper wall 30d of the transmission case 30.

  A part of the gear oil 5 sent from the oil pump 3 is sent to the heat exchanger 4. The heat exchanger 4 exchanges heat between the gear oil 5 and the engine water cooling system. The engine water cooling system is typically cooling water that circulates through a cooling circuit for cooling the inside of the engine. The gear oil 5 that has passed through the heat exchanger 4 returns to the gear oil reservoir 30c.

  The engine water cooling system maintains an appropriate temperature range (for example, about 80 ° C.) immediately after the engine is started. Therefore, when the temperature of the gear oil 5 is low, the gear oil 5 can be heated by heat exchange between the gear oil 5 and the engine water cooling system, and the gear oil 5 can be raised to an appropriate temperature at an early stage.

  The gear oil 5 stored in the gear oil reservoir 30c is provided with an input sub-gear 32a, a first output sub-gear 32b, a second output sub-gear 32c, and a third output sub-gear 32d provided to rotate integrally with the counter shaft 32. Is stirred by. When the temperature of the gear oil 5 is overheated by the stirring heat, the gear oil 5 can be cooled to an appropriate temperature by heat exchange between the gear oil 5 and the engine water cooling system.

  Next, with reference to FIGS. 2 and 3, an oil passage configuration for lubricating the internal space 30 a of the transmission case 30 will be described in detail. FIG. 2 is a cross-sectional view taken along line AA in FIG. FIG. 3 is a cross section taken along line BB in FIG. 2 and 3, the left-right direction of the transmission case 30 is depicted.

  As shown in FIG. 2, an axial oil passage 40 through which the gear oil 5 flows is formed in the upper wall 30 d of the transmission case 30. The axial oil passage 40 is formed, for example, by machining the upper wall 30d of the transmission case 30 with a tool such as a drill. When the transmission case 30 is made by casting, the axial oil passage 40 may be formed at the time of casting.

  As shown in FIG. 3, second oil passages 41 extending left and right are provided at a plurality of locations (four locations in the present embodiment) in the axial direction of the axial oil passage 40. Similar to the axial oil passage 40, the second oil passage 41 is provided inside the upper wall 30d. For example, the second oil passage 41 is machined with a tool such as a drill in the vicinity of the upper end of the side wall 30e of the transmission case 30 to form a hole in the left-right direction, and the opening generated by the machining is plugged. It is formed by sealing with.

  A third oil passage 42 extending downward is provided at the left end and the right end of the second oil passage 41. The third oil passage 42 is provided inside the side wall 30e. The third oil passage 42 is, for example, an opening formed by machining a hole in the vertical direction by machining the vicinity of the left and right end portions of the upper wall 30d of the transmission case 30 with a tool such as a drill. Is formed by sealing with a plug. The second oil passage 41 and the third oil passage 42 are oil passages extending in the circumferential direction of the transmission case 30.

  First injection oil passages 43 extending downward are provided at a plurality of locations (four locations in the present embodiment) in the axial direction of the axial oil passage 40. The lower end of the first injection oil passage 43 is a first injection port 43 a that opens into the internal space 30 a of the transmission case 30. The gear oil 5 supplied to the axial oil passage 40 is injected from the first injection port 43 a into the internal space 30 a of the transmission case 30.

  At a plurality of locations (two locations in the present embodiment) in the vertical direction of the third oil passage 42, a second injection oil passage 44, a third injection oil passage 45, a fourth injection oil passage 46, and a fifth portion extending inward in the left-right direction. A jet oil passage 47 is provided.

  The inner end of the second injection oil passage 44 is a second injection port 44 a that opens into the internal space 30 a of the transmission case 30. The inner end of the third injection oil passage 45 is a third injection port 45 a that opens into the internal space 30 a of the transmission case 30.

  The inner end of the fourth injection oil passage 46 is a fourth injection port 46 a that opens into the internal space 30 a of the transmission case 30. The inner end of the fifth injection oil passage 47 is a fifth injection port 47 a that opens into the internal space 30 a of the transmission case 30.

  The gear oil 5 supplied to the axial oil passage 40 flows through the second oil passage 41 and the third oil passage 42 and is injected into the internal space 30a of the transmission case 30 from the second to fifth injection ports 44a to 47a. The

  Here, as an example, the first to fifth injection oil passages 44 to 47 and the first to fifth injections that supply the gear oil 5 to the input gear 31a and the input sub gear 32a (that is, provided in the foremost side). The positional relationship between the ports 44a to 47a and the input gear 31a and the input sub gear 32a will be described.

  The axial position of the first injection port 43a coincides with the axial position of the input gear 31a. In other words, the axial position at the center of the first injection port 43a coincides with the axial position at the axial center of the input gear 31a. Further, the direction of the first injection port 43a is downward in the vertical direction.

  Therefore, the first injection port 43a faces the input gear 31a. Therefore, the gear oil 5 injected from the first injection port 43a is directly sprayed on the input gear 31a, and the input gear 31a is appropriately lubricated.

  Further, the axial position of the first injection port 43 a coincides with the axial position of the second oil passage 41. In other words, the axial position of the center of the first injection port 43 a coincides with the axial position of the center of the second oil passage 41. Note that the axial position of the first injection port 43a and the axial position of the second oil passage 41 may not coincide with each other.

  The second injection port 44a and the fourth injection port 46a located near the center in the vertical direction of the third oil passage 42 are opposed to each other in the left-right direction. Moreover, the 3rd injection port 45a and the 5th injection port 47a which are located in the lower end of a 3rd oil path mutually oppose about the left-right direction.

  The vertical positions of the centers of the second injection port 44a and the fourth injection port 46a coincide with the vertical position of the center of the input gear 31a. The vertical positions of the centers of the third injection port 45a and the fifth injection port 47a coincide with the vertical position of the center of the input sub gear 32a.

  The axial positions of the second to fifth injection ports 44a to 47a coincide with the axial positions of the input gear 31a and the input sub gear 32a. In other words, the axial positions of the centers of the second to fifth injection ports 44a to 47a coincide with the axial positions of the center in the axial direction of the input gear 31a and the input sub gear 32a.

  Therefore, the second injection port 44a and the fourth injection port 46a face the input gear 31a. Further, the third injection port 45a and the fifth injection port 47a face the input gear 31a.

  Accordingly, the gear oil 5 injected from the second to fifth injection ports 44a to 47a is directly sprayed on the input gear 31a or the input sub gear 32a, and the input gear 31a and the input sub gear 32a are appropriately lubricated.

  The positional relationship between the first to fifth injection oil passages 44 to 47 and the first to fifth injection ports 44a to 47a, the input gear 31a, and the input sub gear 32a has been described above. The same relationship holds for the positional relationship between the other injection ports and the gears.

  As described above, according to the present embodiment, the gear oil accumulated in the oil sump is sent out by the oil pump to circulate inside the wall portion of the transmission case, and further opened to the internal space of the transmission case. It was comprised so that it might inject from an injection port.

  Therefore, the number of parts can be reduced and the structure can be simplified as compared with the case where the gear oil delivered by the oil pump is circulated using an oil pipe disposed outside the transmission case. .

  Further, according to the present embodiment, since the gear oil is configured to circulate inside the wall portion of the transmission case, compared to the case where the gear oil is circulated using an oil pipe disposed outside the transmission case, It can suppress that the temperature of gear oil fluctuates excessively.

  In addition, according to the present embodiment, each injection port is provided so as to face each gear to be lubricated, and the gear oil injected from each injection port is directly blown to each gear to be lubricated. Each gear can be properly lubricated.

  In the above-described embodiment, the description has been given by taking as an example the three components of the torque converter housing 10, the clutch housing 20, and the transmission case 30, but the present invention is not limited to this.

  Specifically, for example, with respect to the substantially cylindrical case, the internal space in which the torque converter is disposed, the internal space in which the clutch is disposed, and the internal space in which the transmission is disposed may be partitioned by partition walls.

  Further, the torque converter may be omitted, and various known types of clutches may be employed for the clutch. Furthermore, various types of components can be adopted for the components arranged in the internal space of the transmission case.

  Further, in the above-described embodiment, each injection port is provided so as to face each gear, and gear oil injected from each injection port is directly sprayed on each gear. However, the present invention is not limited to this.

  Specifically, for example, the positions of the injection oil passage and the injection port may be set so that the gear oil injected from the injection port is directly sprayed to the coupling mechanism.

  The number and orientation of the injection ports may be changed as appropriate according to the object to be lubricated, such as each gear, each coupling mechanism, a bearing that supports each shaft relative to the case, and a bearing that supports each gear relative to each shaft. Is possible.

  In the above-described embodiment, when the oil passage is provided inside the wall portion of the transmission case, the oil passage is formed by machining the wall portion of the transmission case. However, the present invention is not limited to this. . A modification of the oil passage provided inside the wall portion of the transmission case will be briefly described with reference to FIGS.

  4 and 5 are diagrams showing a first modification, and are cross-sectional views corresponding to FIGS. 2 and 3. 6 and 7 are diagrams showing a second modification, and are cross-sectional views corresponding to FIGS. 2 and 3. In the modification shown in FIGS. 4 to 7, the contents that are not particularly described are the same as those in the above embodiment.

  The first modification is an example in which the transmission case is thinned and ribs are provided to ensure strength. In this case, an oil path can be provided inside the rib.

  Specifically, as shown in FIG. 4, the upper wall 130d of the transmission case 130 is provided with a first rib 130f extending in the axial direction. An axial oil passage 140 is provided inside the first rib 130f.

  Further, as shown in FIG. 5, the upper wall 130d of the transmission case 130 is provided with a second rib 130g extending in the left-right direction. A second oil passage 141 that extends in the left-right direction and communicates with the axial oil passage 140 is provided inside the second rib 130g.

  A third rib 130h extending in the vertical direction is provided on the side wall 130e of the transmission case 130. A third oil passage 142 extending in the vertical direction and communicating with the second oil passage 141 at the upper end is provided inside the third rib 130h.

  The axial oil passage 140 is provided with a first injection oil passage 143 extending downward. The lower end of the first injection oil passage 143 serves as a first injection port 143 a that opens into the internal space 130 a of the transmission case 130.

  At a plurality of locations in the vertical direction of the third oil passage 142, a second injection oil passage 144, a third injection oil passage 145, a fourth injection oil passage 146, and a fifth injection oil passage 147 extending inward in the left-right direction are provided. Yes.

  The inner end of the second injection oil passage 144 serves as a second injection port 144 a that opens into the internal space 130 a of the transmission case 130. An inner end of the third injection oil passage 145 serves as a third injection port 145 a that opens into the internal space 130 a of the transmission case 130.

  The inner end of the fourth injection oil passage 146 serves as a fourth injection port 146 a that opens into the internal space 130 a of the transmission case 130. The inner end of the fifth injection oil passage 147 serves as a fifth injection port 147 a that opens into the internal space 130 a of the transmission case 130.

  Thus, by reducing the thickness of the transmission case, providing a rib for ensuring strength, and providing an oil passage inside the rib, the transmission case can be reduced in weight.

  The second modification is an example in which a groove is provided in the transmission case and an oil passage is formed by the groove.

  Specifically, as shown in FIG. 6, an axial groove 230 f extending in the axial direction is provided on the inner surface 230 j of the upper wall 230 d of the transmission case 230. Further, as shown in FIG. 7, the inner surface 230j of the upper wall 230d of the transmission case 230 is provided with a second groove 230g extending in the left-right direction and communicating with the axial groove 230f. A third groove 230h that extends in the vertical direction and communicates with the second groove 230g at the upper end is provided on the inner surface 230k of the side wall 230e of the transmission case 230.

  Further, the second case member 50 is fixed to the transmission case 230. The second case member 50 includes a top plate surface 50a extending in the axial direction and the left-right direction, and a pair of side surfaces 50b extending downward from the left and right ends of the top plate surface 50a. And the top plate surface 50a and the side surface 50b are being fixed with the volt | bolt etc. with respect to the inner surface 230j and the inner surface 230k, respectively. The mating surfaces of the transmission case 230 and the second case member 50 are sealed.

  An axial oil passage 240 is formed by the axial groove 230f and the top plate surface 50a. A second oil passage 241 is formed by the second groove 230g and the top plate surface 50a. Further, a third oil passage 242 is formed by the third groove 230h and the side surface 50b.

  As shown in FIG. 7, a first hole 50c is formed in the top plate surface 50a. A first injection oil passage 243 and a first injection port 243a are formed by the first hole 50c. The side surface 50b is provided with second to fifth holes 50d to 50g. The second to fifth injection oil passages 244 to 247 and the second to fifth injection ports 244a to 247a are formed by the second to fifth holes 50d to 50g.

  Thus, by providing a groove in the transmission case and forming an oil passage by the groove, the oil passage can be easily provided. In the second modification, the second case member 50 has the top plate surface 50a and the side surface 50b, but is not limited thereto. The second case member may have any shape as long as it can close the inner side surface of the groove, and may be divided into a plurality of parts.

  As described above, in the modified examples shown in FIGS. 4 to 7, the number of parts can be reduced and the structure can be simplified as compared with the case of using an oil pipe.

  The lubricating device of the present invention is suitable for lubricating a lubricated part in the transmission case.

3 Oil pump 5 Gear oil 30 Transmission case 30c Gear oil pool 30d Upper wall 30e Side wall 40 Axial oil passage 41 Second oil passage 42 Third oil passage 43 First injection oil passage 43a First injection port 44 Second injection oil passage 44a Second injection port 45 Third injection oil passage 45a Third injection port 46 Fourth injection oil passage 46a Fourth injection port 47 Fifth injection oil passage 47a Fifth injection port 100 Lubrication device

Claims (7)

An oil pump that sucks and discharges oil accumulated in a reservoir in the transmission case;
An oil passage provided in a wall surface of the transmission case and through which the oil discharged from the oil pump flows;
A lubrication apparatus comprising: an injection port that is connected to the oil passage and opens in an inner wall surface of the transmission case. The lubricating device according to claim 1, wherein the oil passage includes an axial oil passage extending in an axial direction of the transmission case. The lubrication apparatus according to claim 1, wherein the oil oil passage includes a circumferential oil passage extending in a circumferential direction of the transmission case. The lubricating device according to any one of claims 1 to 3, wherein a plurality of the injection ports are provided. The lubrication device according to any one of claims 1 to 4, wherein the oil passage is provided inside a rib provided in the transmission case. 5. The oil oil passage is formed by a groove provided on an inner surface of a wall portion of the transmission case, and a second case member fixed to the inner surface. The lubricating device according to one item. The lubrication according to any one of claims 1 to 6, further comprising a second oil passage through which part of the oil discharged from the oil pump flows and returns to the oil reservoir via a heat exchanger. apparatus.

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