JP6373593B2 - Bearing retainer mounting structure for transmission - Google Patents

Description

  The present invention relates to a bearing retainer mounting structure in a transmission for a vehicle such as an automobile.

2. Description of the Related Art A transmission for a vehicle is configured such that rotating members such as various shafts and gears are arranged in a transmission case, and engine output is sequentially transmitted to a subsequent stage side. The bearing for supporting the rotating member is usually mounted by providing a recess in the case body constituting the mission case and fitting it into the recess (for example, Patent Document 1). See).
However, depending on the specifications of the transmission, it may be difficult to attach the bearing to the case body of the transmission case.

Therefore, conventionally, for example, means as shown in FIGS. 4 and 5 are employed. In addition, the site | part shown in FIG. 4 is a site | part similar to embodiment of this invention mentioned later.
In FIG. 4, a part of the first and second case main bodies 7a ′ and 7b ′ constituting the mission case 7E is shown. As shown in FIG. An opening 79 is formed. Around the opening 79, a plurality of protrusions 78 having a positioning hole 78a and a screw hole 78b at the tip are provided. The bearing retainer 9 </ b> E is fixedly attached to the tips of the plurality of protrusions 78 using positioning pins (not shown) and bolts 99. As shown in FIG. 4, the retainer 9 </ b> E holds a bearing 88 that rotatably supports a gear 82 fitted on the shaft 8.

  According to the above means, the retainer 9E can be attached at a predetermined position, but there is room for improvement as described below.

First, the mounting of the retainer 9E requires a plurality of positioning pins and bolts 99, which increases the number of parts. Further, the positioning work of the retainer 9E and the fastening work of the bolt 99 are complicated. Therefore, the parts cost and the assembly work cost are increased, and there is still room for improvement in reducing the manufacturing cost of the transmission.
Second, when a plurality of protrusions 78 for abutting the retainer 9E and bolting are provided in the second case body 7b ′, the first case body 7b ′ includes the first It is necessary to arrange the mating surface with the case main body 7a ′ further outside the tip of the projection 78 described above. For this reason, there is a problem that the entire mission case 7E becomes large.

JP 2011-190823 A

  The present invention has been conceived under the circumstances as described above, and has a bearing retainer mounting structure for a transmission that can suitably reduce the manufacturing cost and reduce the size of a transmission case. The issue is to provide.

  In order to solve the above problems, the present invention takes the following technical means.

A bearing retainer mounting structure in a transmission provided by the present invention includes a rotating member disposed in a transmission case having first and second case bodies connected to each other, and a bearing that supports the rotating member. And a retainer mounting structure for a bearing in a transmission, wherein the retainer and the second case main body are fitted to each other in the thrust direction of the rotating member. First and second fitting portions that can be joined are provided, and by these fittings, the retainer is positioned with respect to the second case body in the radial direction of the rotating member. The second case main bodies are configured so that the retainer is disposed on both sides in the thrust direction of the rotating member. As al scissors put, the retainer is connected at a position different from the arranged position and the retainer, different components such as bolts or screws for attaching the retainer to the first and second case body without being provided with connecting means by, it is characterized in that it is fixed between each other of the first and second case body.

According to such a configuration, the following effects can be obtained.
First, the bearing retainer is positioned and fixed by fitting the second case body of the transmission case with the retainer and sandwiching the retainer from both sides of the first and second case bodies. In addition, unlike the prior art, a plurality of positioning pins and bolts are unnecessary. Therefore, the number of parts can be reduced and the part cost can be reduced. In addition, the work for positioning the retainer using the positioning pins and the work for fastening the bolts are not required, so that the production efficiency can be improved by reducing the number of assembly work steps. As a result, it is possible to suitably reduce the manufacturing cost of the transmission.
Secondly, according to the structure in which the retainer is fitted to a predetermined part of the second case main body and sandwiched between the first and second case main bodies, the rotating member is compared with the prior art. It is possible to reduce the width of the mission case in the thrust direction. Therefore, the advantage that the miniaturization of the transmission case and the miniaturization of the entire transmission can be promoted is also obtained.

  Other features and advantages of the present invention will become more apparent from the following description of embodiments of the present invention with reference to the accompanying drawings.

It is a plane explanatory view showing typically the whole composition of the transmission for vehicles as an example of the candidate for application of the present invention. It is principal part sectional drawing which shows an example of the retainer attachment structure for bearings to which this invention was applied. It is a disassembled perspective view which shows the retainer and 2nd case main body of the retainer attachment structure shown in FIG. It is principal part sectional drawing which shows an example of a prior art. It is a disassembled perspective view which shows the retainer and 2nd case main body of the structure shown in FIG.

  Hereinafter, preferred embodiments of the present invention will be specifically described with reference to the drawings.

First, an outline of an example of a transmission to which the present invention is applied will be described with reference to FIG.
A transmission A shown in the figure is connected to an output shaft 10 a of an engine 10 via a torque converter 11, and output rotation from the torque converter 11 is converted into a pair of axles 3 a, It is for telling to 3b. Specifically, the vehicle transmission device A is a so-called torque split system, and includes a belt-type transmission mechanism 4, a gear-type transmission mechanism 5, a planetary gear mechanism 6, and a transmission case 7 that accommodates these. Yes. The mission case 7 is configured by connecting first to third case bodies 7a to 7c. The first case body 7a and the third case body 7c are formed in a cover shape having a relatively small width, but the case body referred to in the present invention is a cover shape having such a relatively small width. It is a concept including what was formed in

  In the transmission A, the output of the engine 10 is transmitted to the primary shaft 8 a via the torque converter 11, and the rotational force of the primary shaft 8 a is output to the secondary shaft 8 b via the belt-type transmission mechanism 4. The belt-type transmission mechanism 4 has a structure in which a belt 41 is wound around a pair of pulleys 40a and 40b capable of variably controlling the belt hook diameter. The gear-type transmission mechanism 5 can be switched between connected and disconnected with respect to the primary shaft 8a via the clutch C1, and the rotational force of the primary shaft 8a is transmitted to the carrier 63 of the planetary gear mechanism 6 via the gears 51 to 53. Can be communicated to. The sun gear 60 of the planetary gear mechanism 6 is connected to the secondary shaft 8b, and the output shaft 81 is connected to the ring gear 62 of the planetary gear mechanism 6. The rotational force of the output shaft 81 is transmitted to the ring gear 20 of the differential gear mechanism 2 via the gears 82 to 84, and the axles 3a and 3b are driven.

  In this transmission A, when the clutch C1 is off (disengaged) and the clutch C2 is on (connected), the gear-type transmission mechanism 5 is not used, and is decelerated via the belt-type transmission mechanism 4. Only the driving force transmitted to the differential gear mechanism 2 is transmitted. On the other hand, when the clutch C1 is turned on and the clutch C2 is turned off, the reduced driving force is transmitted to the differential gear mechanism 2 via the gear transmission mechanism 5 and the belt transmission mechanism 4. To do. The reduction ratio of the gear-type transmission mechanism 5 is constant, but the total reduction ratio at that time can be controlled by changing the transmission ratio of the belt-type transmission mechanism 4. A brake B1 is provided in the vicinity of the carrier 63 of the planetary gear mechanism 6. When the brake B1 is turned on to stop the rotation of the carrier 63, the output shaft 81 can be reversely rotated (reverse mode setting of the vehicle). is there.

  In the transmission A shown in FIG. 1, the boss portion of the counter gear 82 mounted on the output shaft 81 is supported by a bearing 88 held by the retainer 9. The attachment structure of the retainer 9 is an example of a structure to which the present invention is applied, and the counter gear 82 corresponds to an example of a “rotating member” in the present invention.

As shown in FIGS. 2 and 3, the retainer 9 has a substantially hollow disk shape, and a bearing 88 can be fitted and held in the central opening 90. The retainer 9 and the second case body 7b are provided with first and second fitting portions 91 and 71 that can be fitted to each other. As shown in FIG. 3, the second fitting portion 71 has a substantially arcuate shape in a front view provided in the form of being vertically separated at the peripheral portion of the opening 79 for inserting the secondary shaft 8b. It is convex and protrudes toward the first case body 7a. The first fitting portion 91 is provided at a position near the outer peripheral edge of the front surface portion of the retainer 9, and has a substantially arc shape in front view protruding toward the front (left side in FIG. 2) of the retainer 9. It is a protruding piece. The first fitting portion 91 can be fitted inside the second fitting portion 71 so as not to rattle. As a result, the retainer 9 is positioned relative to the second case body 7b in the radial direction of the output shaft 81 and the counter gear 82.
The reason why each of the first and second fitting portions 91 and 71 is provided separately in the vertical direction is to avoid interference with other members arranged in the mission case 7 ( For example, this is for avoiding interference with the gear 84 and the gear 52 shown in Fig. 1. In Fig. 1, the gear 52 is shown in a state of being considerably separated from the retainer 9, but actually, In close proximity to the retainer 9).

A flange portion 92 protruding outward in the radial direction of the retainer 9 is provided on the outer peripheral surface of the retainer 9. As shown in FIG. 2, the flange portion 92 is a portion for contacting the front end surface of the second fitting portion 71. Like the first and second fitting portions 91 and 71, the flange portion 92 is Are provided separately. On the tip surface of the upper second fitting portion 71, a convex portion 72 for preventing rotation is provided, whereas the convex portion 72 can be fitted into the upper flange portion 92 of the retainer 9. A notch 93 is provided. The retainer 9 can be prevented from rotating by fitting the convex portion 72 and the notch portion 93 together.

  Of the inner wall surface of the first case main body 7a, a portion facing the vicinity of the outer peripheral edge of the retainer 9 is formed as, for example, a convex stepped portion 73 protruding toward the retainer 9 side. The vicinity of the outer peripheral edge of the retainer 9 is sandwiched between the convex stepped portion 73 and the second fitting portion 71 in the thrust direction of the output shaft 81 and the counter gear 82. Similar to the first and second fitting portions 71, the convex stepped portion 73 is provided, for example, in two separated upper and lower portions. The second case body 7b has a mating surface 75 provided with a plurality of holes 74 for fastening bolts. As shown in FIG. 1, the mating surface 75 abuts the mating surface 76 of the first case main body 7a, and the first and second case main bodies 7a and 7b include a plurality of bolts (not shown). ).

  Next, the operation of the retainer 9 mounting structure will be described.

  First, as described above, the first and second fitting portions 91 and 71 are fitted to each other, whereby the retainer 9 can be accurately positioned and fixed in the radial direction. Further, since the retainer 9 is sandwiched between the first and second case bodies 7a and 7b, the retainer 9 can be positioned and fixed in the thrust direction. Further, due to the fitting action of the convex portion 72 and the notch portion 93, the retainer 9 is more reliably prevented from rotating inappropriately. For this reason, the retainer 9 and the bearing 88 can be accurately attached.

  When the retainer 9 is attached, separate parts such as positioning pins and bolts for the retainer 9 are not necessary. For this reason, it is possible to reduce the total number of parts and reduce the part cost. In addition, the positioning of the retainer 9 is easy, and the bolt fastening operation of the retainer 9 is unnecessary, so that the number of assembly steps of the transmission A can be reduced. Therefore, it is possible to favorably reduce the manufacturing cost of the transmission A. The retainer 9 is fixed by being sandwiched between the second fitting portion 71 of the second case body 7b and the convex stepped portion 73 of the first case body 7a. It is possible to prevent the first case body 7a from being bulky outwardly due to the attachment. Therefore, it is also preferable for promoting the downsizing of the entire mission case 7.

  Each of the first and second fitting portions 91 and 71 is divided into two parts in the vertical direction for the purpose of avoiding interference with other members. If the fitting portions 91 and 71 are divided into two and a gap is provided between them, the entire volume of the first and second fitting portions 91 and 71 can be reduced accordingly. is there. This is preferable in terms of weight reduction and material saving.

  The present invention is not limited to the contents of the above-described embodiment. The specific configuration of each part of the bearing retainer mounting structure in the transmission according to the present invention can be variously modified within the range intended by the present invention.

In the above-described embodiment, each of the first and second fitting portions 91 and 71 is provided in a vertically divided state, but the present invention is not limited to this, and is divided into a larger number. Also good. Moreover, when there is no possibility of causing interference with other members, the first and second fitting portions 91 and 71 may be formed in a cylindrical shape or the like without being divided. First mentioned in the present invention
The second fitting portion is provided in each of the retainer and the second case main body, and is engaged with each other in the thrust direction, thereby positioning the retainer relative to the second case main body in the radial direction. Any configuration that plays a role may be used.

  In the present invention, the specific structure for sandwiching the retainer from both sides by the first and second case bodies is not particularly limited. In the above-described embodiment, the retainer 9 is sandwiched between the second fitting portion 71 and the first case body 7a. Of the second case body 7b, the second fitting portion is provided. It is also possible to adopt a structure in which the retainer 9 is sandwiched between a portion different from 71 and the first case body 7a.

The “rotating member” in the present invention is not limited to the counter gear 82. For example, various members supported by using bearings such as various gears other than the above, and various rotating shafts can be used as the rotating member in the present invention. The specific shape, size, material, and the like of the retainer for the bearing can be variously changed. The specific type of bearing supported by the retainer is not limited.
The transmission is not limited to a torque split type. A normal CVT system, a stepped automatic transmission, a manual transmission, or the like can also be applied to the present invention.

A Transmission 4 Belt-type transmission mechanism 5 Gear-type transmission mechanism 6 Planetary gear mechanism 7 Mission cases 7a to 7c First to third case main bodies 71 Second fitting portion 72 Anti-rotation convex portion 9 Retainer 82 Counter gear (Rotating member)
88 Bearing 91 1st fitting part

Claims (1)

A rotating member disposed in a mission case having first and second case bodies coupled to each other;
A retainer for fixedly supporting the bearing supporting the rotating member in the transmission case;
A retainer mounting structure for a bearing in a transmission, comprising:
The retainer and the second case main body are provided with first and second fitting portions that can be fitted to each other in the thrust direction of the rotating member, and by these fittings, the radial direction of the rotating member is provided. The retainer is positioned with respect to the second case body,
The first and second case bodies are connected to each other at a position different from the position where the retainer is disposed so as to sandwich the retainer from both sides in the thrust direction of the rotating member, and the retainer is The retainer is fixed between the first and second case main bodies without providing a connecting means using separate parts such as bolts and screws for attaching the retainer to the first and second case main bodies. A retainer mounting structure for a bearing in a transmission.

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