JP6035181B2 - Oil receiver and transmission - Google Patents

Description

  The present invention relates to an oil receiver and a transmission.

  For example, Patent Literature 1 and Patent Literature 2 include transmissions that change the power input from the power source in accordance with the vehicle speed and output the power to the drive wheels.

  By the way, the transmissions of Patent Document 1 and Patent Document 2 have a rotation center shaft (input shaft) in which a plurality of rolling members (gears, clutch hubs, etc.) are attached to one of cases that can be divided into a plurality of cases. , One end of the output shaft, etc.) is inserted and the remaining cases are covered, and the cases are fixed to each other, or the case and the rotation center shaft are fixed to form one case. In the transmission shown in FIG. 1 of Patent Document 1 and FIG. 1 of Patent Document 2, two of the three rotation center shafts have both ends inserted into the case, and one has one end inserted into the case. Yes. Therefore, it is common to assemble with the side where the three rotation center shafts are inserted facing down. However, the side on which the two rotation center shafts are inserted may be assembled downward. In such a case, the position of the rotation center shaft not inserted in the lower case is maintained by some method, and is assembled by covering another case. In order to hold the position of the rotation center axis that is not inserted into the case, if it is supported from the outside of the case by a hand, a jig, a robot, or the like, what is held to cover another case becomes an obstacle. If a member for holding inside is arranged, unnecessary members remain in the transmission after assembly.

JP 2012-154444 A (see FIG. 1) JP 2012-163178 A (see FIG. 1)

  The present invention has been made in view of the above situation, and when assembling one of the cases divided into a plurality of cases downward, an oil receiver and a transmission for holding a rotation center shaft that is not held with respect to the case. Providing a machine is an issue to be solved.

The structural feature of the invention of (1) for solving the above-mentioned problem is a case that can be divided into a plurality of cases,
A plurality of rotation center shafts pivotally supported by the case;
A plurality of rolling members rotatably attached to the plurality of rotation center shafts;
An oil receiver for use in a transmission having
A first case is one of the pre-Symbol case, located between the first central axis of rotation does not contact the one with and the first case of the rotation center axis,
A shaft support that supports one of the first rotation center shafts;
A receiving portion that is located between the first rotation center shaft and the first case, one of which is in contact with the first case and receives the lubricating oil in the transmission;
One holding portion is in contact with the first case, and the holding portion is located between the first rotation center axis and the first case on the opposite side to the receiving portion receiving the lubricating oil,
Equipped with a,
The shaft support portion, the receiving portion, and the holding portion are integral der Rukoto.

The invention of the above (1) can be adopted by arbitrarily adding one or more of the configurations of (2) and (3) described below.
The invention of (2) is that the other holding portion of the holding portion comes into contact with the shaft support portion.
The invention of (3) includes a lubricating oil passage in which the first rotation center axis is formed in the axial direction inside,
A discharge portion for discharging the lubricating oil received by the receiving portion;
The discharge part and the lubricating oil passage communicate with each other.

  The invention of (4) is that the first rotation center axis is pivotally supported by a second case which is one of the cases that can be divided into a plurality of cases.

  Invention of (5) is having the oil receiver as described in any one of (1)-(4).

  The first rotation center shaft does not contact the first case, and the oil receiver contacts the first case. The oil receiver is located between the first rotation center axis and the first case. The oil receiver is in contact with the first rotation center shaft at the shaft support portion, and the receiving portion and the holding portion are in contact with the first case. That is, the oil receiver is arranged between the first rotation center axis and the first case. Therefore, when assembling with the first case facing down, the first rotation center shaft contacts the first case at two locations, and the first receiver is contacted at one location by the oil receiver. Retained. Therefore, when assembling the first case among the cases divided into a plurality of parts, the first rotation center axis is held by the oil receiver.

  And after a transmission is assembled, the receiving part of an oil receiver is utilized as an oil receiver. The holding part is in contact with the first case so as to be held at a position where the oil receiver is installed. Therefore, the oil receiver of the present invention is not an unnecessary member even after being assembled.

It is explanatory drawing which shows a part of case of a transmission provided with the oil receiver of embodiment. It is explanatory drawing which shows the assembly middle in which the subassembly provided with the oil receiver of embodiment was assembled | attached. FIG. 3 is a partial cross-sectional view of the vicinity of an idler shaft 23 to which the oil receiver 3A of Embodiment 1 is attached. It is a partial sectional view near the idler shaft 23 to which the oil receiver 3B of Embodiment 2 is attached. It is a partial cross section figure around the idler axis | shaft 23 to which the oil receiver 3C of Embodiment 3 was attached.

  A representative embodiment of the present invention will be described with reference to FIGS. An oil receiver and a transmission including the oil receiver according to the present embodiment are mounted on a vehicle.

  As shown in FIG. 1, the transmission includes a case 1 that is divided into a rear case (first case) 11, a middle case (third case) 12, and a front case (second case) 13. As shown in FIG. 2, the transmission includes three rotation center shafts of an input shaft 21, an output shaft 22, and an idler shaft 23. A rolling member is attached to each of the rotation center shafts (21 to 23) so as to be capable of synchronous rotation or relative rotation with the rotation center shaft. For example, a gear 211 is attached to the input shaft 21 as a rolling member, and other gears, a clutch hub, a synchronizer ring, and the like are also attached. In FIG. 2, the illustration of the teeth of the gear 211 is omitted, and the illustration of another gear or the like is also inside the broken line, and the illustration is omitted. The output shaft 22 is similarly attached with a plurality of rolling members. A gear 221 is also attached to the output shaft 22 as a rolling member, and the other rolling members are assumed to be inside the broken line and are not shown. The idler shaft 23 is provided with an idler gear 231 for reverse gear and an oil receiver 3 (3A). A set in which rolling members and members related to the rolling members are attached to the respective rotation center shafts (21 to 23) is referred to as a sub-assembly 4. FIG. 2 shows a state in which one end of each of the input shaft 21 and the output shaft 22 of the sub assembly 4 is inserted into the rear case 11.

(Embodiment 1)
The oil receiver 3 </ b> A according to the first embodiment is attached to an idler shaft (first rotation center shaft) 23 as shown in FIGS. 2 and 3. First, the idler shaft 23 to which the oil receiver 3A is attached has one end 232 pivotally supported by the front case 13 as shown in FIG. The other end 233 is fixed to the middle case 12 with a bolt 14. The bolt 14 is screwed into the other end 233 from the outside of the middle case 12, and the idler shaft 23 is installed so as not to rotate with respect to the middle case 12, that is, the case 1. A lubricating oil passage 235 through which lubricating oil flows is defined inside the idler shaft 23. The lubricating oil passage 235 is formed along the axial direction, and one side opens to the one end 232 side, and the other opens to the other end 233 side. An idler gear 231 is attached to the outer periphery of the idler shaft 23 via a bearing 236 so as to be relatively rotatable. The idler gear 231 is engaged with a gear 212 formed integrally with the input shaft 21. The diameter of the other end 233 is larger than the diameter of the one end 232, and there is a step 237. The idler gear 231 abuts on the step 237 and the axial movement toward the other end 233 is restricted. Further, an engaged portion 238 that is recessed toward the one end 232 side in the axial direction is formed on the other end 233 side, and an engaging portion 332 of an oil receiver 3A described later is engaged.

(Configuration of oil receiver)
The oil receiver 3 </ b> A includes a shaft support portion 31, a receiving portion 32, and a holding portion 33. The shaft support portion 31 is one idler shaft 23 side of the receiving portion 32 and the holding portion 33 in the axial direction of the idler shaft 23, and is a portion integrally connecting the receiving portion 32 and the holding portion 33. 23 to support the oil receiver 3A. The receiving portion 32 is a box-shaped member that is located between the idler shaft 23 and the rear case 11 in the axial direction of the idler shaft 23 and that opens upward when the transmission is mounted on the vehicle. The receiving portion 32 receives the lubricating oil from the upper opening 321 and causes the received lubricating oil to flow along the bottom surface 322 to the idler shaft 23 side. The bottom surface 322 is inclined from the rear case 11 side toward the idler shaft 23 side so that the idler shaft 23 side is lowered. The receiving part 32 further includes a discharge part 323 and a case contact part 324. The discharge part 323 is located on the idler shaft 23 side, and has a cylindrical shape protruding from the lubricating oil path 235 so as to discharge the lubricating oil flowing along the bottom surface 322 to the lubricating oil path 235 of the idler shaft 23. And engages with the lubricating oil passage 235. The case contact portion 324 is a side portion that is located on the rear case 11 side and contacts the rear case 11.

  The holding portion 33 is positioned between the idler shaft 23 and the rear case 11 in the axial direction of the idler shaft 23 on the bottom 325 side of the receiving portion 32 (lower side when the transmission is mounted on the vehicle). A part 331, an engaging part 332, and an installation part 333 are provided. The engaging portion 332 is positioned on the idler shaft 23 side of the main body portion 331 in the axial direction, protrudes from the idler shaft 23, and is inserted into the engaged portion 238 at the other end 233 of the idler shaft 23 to be engaged. To do. The installation portion 333 is located on the rear case 11 side of the main body portion 331 in the axial direction, contacts the rear case 11, and engages the protruding portion 111 of the rear case 11. The main body 331 is inclined upward as it becomes thinner in the vertical direction from the idler shaft 23 toward the rear case 11.

(Flow of lubricating oil received by the oil receiver 3A)
The oil receiver 3 </ b> A receives the lubricating oil that scatters, flies, or drops from the opening 321 of the portion 32, flows along the bottom surface 322 to the discharge portion 323, and leads out from the discharge portion 323 to the lubricating oil passage 235. The lubricating oil that has flowed into the lubricating oil passage 235 flows out of the lubricating oil passage 235 from the opposite side to the oil receiver 3A that has flowed in, and is led to the location where the lubricating oil is to be supplied or the bottom of the case 1 (not shown). It is burned. For example, it accumulates on the outer peripheral side of the rolling member (gear, etc.) of the input shaft 21 or the output shaft 22, from the flow path defined inside the input shaft 21 or the output shaft 21, or on the inner peripheral side of the rolling member or below. It is possible to return to the lubricating oil.

(Assembly method of oil receiver 3A)
Next, a method for assembling the oil receiver 3A of Embodiment 1 to the transmission will be described. First, the idler gear 231 and the oil receiver 3A are assembled to the idler shaft 23. Either may be assembled first. The idler gear 231 is inserted together with the bearing 236 from the one end 232 side of the idler shaft 23 as shown in FIG. 3 and abuts against the step 237 of the idler shaft 23. The idler gear 231 and the bearing 236 are restricted from moving toward the other end 233 in the axial direction by the step 237. The oil receiver 3A engages the discharge portion 323 of the receiving portion 32 with the lubricating oil passage 235 of the idler shaft 23, engages the engaging portion 332 of the holding portion 33 with the engaged portion 238 of the idler shaft 23, and The shaft 23 is assembled. A state where the idler gear 23 and the oil receiver 3A are assembled to the idler shaft 23 is referred to as an idler shaft sub-assembly.

  And also in the input shaft 21 and the output shaft 22, each rolling member and other members are assembled | attached so that the idler gear 231 may be attached to the idler shaft 23, and an input shaft subassembly and an output shaft subassembly are each assembled. The input shaft sub-assembly, output shaft sub-assembly, and idler shaft sub-assembly are in the state of one sub-assembly 4 by engaging and engaging with other sub-assembly members, if necessary, among the members assembled to them. (See FIG. 2).

  Then, as shown in FIG. 2, the subassembly 4 is assembled to the rear case 11. The rear case 11 is held with the side coupled to the middle case 12 facing up. The sub assembly 4 inserts one end of the input shaft 21 and the output shaft 22 into the rear case 11 from above the held rear case 11 with one end of the input shaft 21 and the output shaft 22 facing downward. At this time, in the idler shaft sub-assembly, the oil receiver 3A is positioned below the idler gear 231. With the input shaft 21 and one end of the output shaft 22 inserted, the receiving portion 32 of the oil receiver 3A is in contact with the rear case 11 and the installation portion 333 of the holding portion 33 is in contact with the rear case 11. Touch. A protruding portion 111 protruding toward the middle case 12 is formed at a location where the installation portion 333 of the oil receiver 3A of the rear case 11 contacts. In the oil receiver 3A, the idler shaft sub-assembly is positioned by aligning the installation portion 333 with the protruding portion 111. Since the oil receiver 3A is also in contact with the rear case 11 at the case contact portion 324 of the receiving portion 32, the idler shaft subassembly is held at a predetermined position by the oil receiver 3A.

  Next, when the subassembly 4 is assembled to the rear case 11, the middle case 12 is assembled. The middle case 12 is covered from above the rear case 11 and the sub assembly 4 so as to cover the sub assembly 4 and is fixed to the rear case 11 in this state. Other members are further fixed to the middle case 12 with bolts or the like. One of them is an idler shaft 23. As described above, the bolt 14 is inserted in a direction substantially orthogonal to the idler shaft 23, and the idler shaft 12 is fixed to the middle case 12 by the bolt 14 (see FIG. 3).

  Finally, the front case 13 is assembled. The other end of the input shaft 21 and the output shaft 22 is inserted into the front case 13. The idler shaft 23 is also inserted into the front case 13 at one end 232 on the same side as the other ends of the input shaft 21 and the output shaft 22 in the axial direction (see FIG. 3). Then, the front case 13 and the middle case 12 are fixed, and the assembly of the transmission housed in the case 1 is completed. Thereafter, a clutch (not shown) is attached to the other end of the input shaft 21, or a ring gear (not shown) of the differential device is engaged with a final gear located on one end side of the output shaft 22. Since the assembling methods and processes employ known methods and processes and are not directly related to the invention according to the present specification, description thereof will be omitted.

(effect)
The oil receiver 3 </ b> A according to the first embodiment is located between the idler shaft 23 and the rear case 11, the idler shaft 23 side with the shaft support portion 31 is in contact with the idler shaft 23, and the case contact portion 324 of the receiving portion 32. And the installation part 333 of the holding part 33 contacts the rear case 11. The receiving portion 32 and the holding portion 33 are integrally connected by a shaft support portion 31. When the transmission is assembled or when the idler shaft 23 is assembled with the front case 13 facing downward, the idler shaft 23 is pivotally supported by the front case 13. When the idler shaft 23 is assembled with the front case 13 facing down, the idler gear 231 is shaped and configured to be held by the front case 13 (see FIG. 3). When assembled with the rear case 11 facing down, the idler shaft 23 and the idler gear 231 are not directly in contact with the rear case 11 and are therefore held against the rear case 11 by the oil receiver 3A. The oil receiver 3 </ b> A is not simply located between and in contact with the idler shaft 23 and the rear case 11. The receiving portion 32 has a shape that widens from the idler shaft 23 side toward the rear case 11. The holding part 33 is located on the opposite side of the direction in which the receiving part 32 spreads. That is, the oil receiver 3A as a whole is divided into two forks to hold the idler shaft 23. Since the oil receiver 3A does not protrude from the case 1, it does not get in the way of assembly work. Furthermore, although the holding | maintenance part 33 is not directly related to the function as an oil receiver, it contributes to the oil receiver 3A holding | maintaining a position. Even if the engagement between the discharge portion 323 of the oil receiver 3 </ b> A and the lubricating oil passage 235 of the idler shaft 23 is not tightly fitted with no gap, the holding portion 33 does not easily disengage the engagement. Therefore, when the assembling work is performed with the rear case 11 facing down, the position of the idler shaft 23 and the idler gear 231 is held by the oil receiver 3A, so that the assembling is difficult or the assembling is difficult.

(Embodiment 2)
As shown in FIG. 4, the oil receiver 3 </ b> B according to the second embodiment includes a shaft support portion 31, a receiving portion 32, and a holding portion 34. Since the shaft support portion 31, the receiving portion 32, and the idler shaft 23 have the same configuration as the shaft support portion 31, the receiving portion 32, and the idler shaft 23 of the oil receiver according to the first embodiment, detailed description thereof is omitted.

  The holding part 34 includes a main body part 341, an engaging part 342, and an installation part 343. The main body portion 341 has a trapezoidal shape extending downward from the entirety of the lower portion of the receiving portion 32 (direction when the transmission is mounted on the vehicle), and is located between the idler shaft 23 and the rear case 11. An engaging portion 342 that protrudes from the shaft support portion 31 toward the idler shaft 23 is provided, and the installation portion 343 on the rear case side 11 abuts along the rear case 11 from the bottom portion 325 side of the receiving portion 32.

  In the oil receiver 3B of the second embodiment, since the holding portion 34 includes the main body portion 341 from the receiving portion 32 to the entire bottom side 325, there is a configuration in which the idler shaft 23 is continuous to the rear case 11. . Therefore, according to the oil receiver 3B of the second embodiment, the idler shaft 23 can be more securely held in the axial direction.

(Embodiment 3)
As shown in FIG. 5, the oil receiver 3 </ b> C of the third embodiment includes a shaft support portion 31, a receiving portion 32, and a holding portion 35. Since the shaft support portion 31, the receiving portion 32, and the idler shaft 23 have the same configuration as the shaft support portion 31, the receiving portion 32, and the idler shaft 23 of the oil receiver according to the first embodiment, detailed description thereof is omitted.

  The holding unit 35 includes a main body unit 351 and an installation unit 353. The main body portion 351 has a shape along the rear case 11 from below the case contact portion 324 of the receiving portion 32 (direction when the transmission is mounted on the vehicle), and the installation portion 353 is attached to the rear case 11 on the main body. This is the rear case side 11 of the portion 351. The oil receiver 3 </ b> C has a shape in which the opening 321 of the receiving portion 32 is turned upward and the whole is seen from the side, as seen from the side of the high heel. Positioning can be performed by engaging a portion of the main body portion 351 away from the end portion 3511 and the bottom portion 325 of the receiving portion 32 with the protrusion 112 formed on the rear case 11.

(Other embodiments)
The preferred embodiment of the present invention has been described above, but the present invention is not limited to the above embodiment. For example, the discharge part 323 of the oil receiver 3 (3A, 3B, 3C) does not have to be engaged with the lubricating oil passage 325 without a gap, and the case contact part 324 and the installation part 333 are in contact with the rear case 11. Thus, the idler shaft 23 is held even when the assembly operation is performed with the rear case 11 facing downward. The idler shaft 23 is fixed to the case 1 if the holding is maintained when the middle case 12 and the front case 13 are installed. Even after assembly as a transmission, that is, in a state where the opening 321 of the receiving portion 32 is positioned upward, the oil receiver 3 is unlikely to be lowered due to the shape of the holding portions 33 to 35 that contact the shaft support portion 31 and the rear case 11. .

1: Case,
11: Rear case (first case), 111: Projection,
12: Middle case, 13: Front case,
21: input shaft (rotation center shaft), 211, 212, 221: gear,
22: output shaft (rotation center axis), 23: idler shaft (first rotation center axis),
231: idler gear, 232: one end, 233: the other end, 234: a through hole,
235: lubricating oil path, 236: bearing, 237: step, 238: engaged portion,
3, 3A, 3B, 3C: oil receiver, 31: shaft support part, 32: receiving part,
321: Opening, 322: Bottom, 323: Discharge part, 324: Case contact part, 325: Bottom part,
33 to 35: holding portion, 331, 341, 351: main body portion, 332, 342: engaging portion,
333, 343, 353: installation part,
4: Sub-assy
91-93: Fork shaft.

Claims (5)

A case that can be divided into multiple cases,
A plurality of rotation center shafts pivotally supported by the case;
A plurality of rolling members rotatably attached to the plurality of rotation center shafts;
An oil receiver for use in a transmission having
A first case that is one of the cases and a first rotation center axis that is one of the rotation center axes and does not contact the first case;
A shaft support that supports one of the first rotation center shafts;
A receiving portion that is located between the first rotation center shaft and the first case, one of which is in contact with the first case and receives the lubricating oil in the transmission;
One holding portion is in contact with the first case, and the holding portion is located between the first rotation center axis and the first case on the opposite side to the receiving portion receiving the lubricating oil,
Equipped with a,
The shaft support portion, the receiving portion, and the holding portion is Ru integrally der oil receiver.   The oil receiver according to claim 1, wherein the other holding portion is in contact with the shaft support portion. The first rotation center shaft includes a lubricating oil passage formed therein in an axial direction,
The receiving part includes a discharging part for discharging the received lubricating oil,
The oil receiver according to claim 1 or 2, wherein the discharge portion and the lubricating oil passage communicate with each other.   The oil receiver according to any one of claims 1 to 3, wherein the first rotation center shaft is pivotally supported by a second case that is one of the plurality of cases that can be divided into a plurality of cases. .   The transmission which has an oil receiver as described in any one of Claims 1-4.

Images