JP3490162B2 - Rotary member coupling structure of transmission - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coupling structure of rotating members such as a ring gear and an output shaft of a transmission.

[0002]

2. Description of the Related Art Conventionally, as a rotary member coupling structure of a transmission, for example, a structure described in Japanese Patent Publication No. 61-27619 (first prior art) and a structure described in Japanese Patent Laid-Open No. 3-117754 (No. 2 prior art) is known.

In the first prior art, as shown in FIG. 5, an end plate 02 connected to an output shaft 01 and a planetary gear 03.
The connection structure with the ring gear 04 of is shown,
The outer circumference of the end plate 02 is splined to the inner circumference of the ring gear 04, and a snap ring 05 for restricting the relative movement of the ring gear 04 and the end plate 02 in the axial direction is provided on the inner circumference of the ring gear 04. ing. Output shaft 0
An output gear (not shown) is coupled to the end portion on the side opposite to the end plate 02.

In the second prior art, as shown in FIG. 6, the inner circumference of the output shaft 07 having the output gear 06 formed on the outer circumference and the outer circumference of the ring gear 08 of the planetary gear are spline-coupled to each other.
A structure in which a relative movement in the axial direction is restricted by interposing a snap ring 09 between the both 07 and 08.

[0005]

However, in the coupling structure of the first prior art described above, in the output shaft 01, the ring gear 04 and the output gear (not shown) are arranged axially apart from each other, and There is a problem that the axial dimension becomes long.

Further, in the second prior art, the output shaft 07 and the ring gear 08 are directly coupled to each other and the output gear 06 and the ring gear 08 are axially close to each other, so that the axial dimension is smaller than that in the first prior art. Can be shortened. However, in the second conventional technique, the spline 010 and the output gear 06 that are coupled to the ring gear 08 on the output shaft 07 are processed by the bob cutter, but at the time of this processing,
In order to prevent the cutters from buffering each other, it is necessary to provide a gap 0L having a certain dimension or more in the axial direction, and there is a problem that the axial dimension becomes longer by this amount, and the ring gear 08
Has a problem that the degree of freedom in design is low because the coupling structure is possible only when the outer diameter of is smaller than the inner diameter of the output shaft 07.

The present invention has been made in view of the above-mentioned conventional problems, and an object of the present invention is to provide a rotary member coupling structure which can be reduced in axial dimension and has a high degree of freedom in design.

[0008]

In order to achieve the above object,
In the rotating member coupling structure for a transmission according to claim 1, a plurality of first projecting portions projecting in the axial direction are provided in the first rotating member provided in the transmission in a circumferential direction with a gap therebetween. And the second rotating member coupled to the first rotating member,
A plurality of second protrusions that are radially inserted into the gap and engageable with the first protrusion in the circumferential direction are provided, and the second protrusion of the second rotating member is inserted into the gap of the first rotating member. And the second protrusion is arranged in contact with or close to the bottom surface of the gap, the second protrusion and the first protrusion are engaged in the circumferential direction, and the second protrusion and the bottom surface of the gap are arranged in the axial direction. As the stopper member that can be engaged on one side and that restricts the movement of the second protrusion in the other axial direction of the first protrusion ,
A snapper that is axially engaged and attached to the protrusion
The snap ring has a diameter
Direction stopper protrusion is provided, and this stopper protrusion is
The two protrusions are engaged with each other in the axial direction, and are coupled so that the thrust force of the second rotating member is received by the stopper member.

Further, in the rotating member coupling structure of the transmission according to the present invention, the first rotating member is an output shaft of the transmission, and the second rotating member is a ring gear of a planetary gear provided in the transmission. Combined with.

According to a third aspect of the present invention, there is provided a rotating member coupling structure for a transmission according to the second aspect, wherein an output gear is provided on an outer circumference of a first rotating member which is an output shaft of the transmission.
The rotating member is formed of an annular plate, and the outer circumference of the second rotating member is coupled to the inner circumference of the ring gear, while the second protruding portion is formed on the inner circumference of the second rotating member.

[0011]

[0012]

In the connecting structure according to the first aspect of the present invention, when connecting the first rotating member and the second rotating member, the second protruding portion of the second rotating member is radially inserted into the gap of the first rotating member,
Further, a stopper member that restricts the movement of the second protrusion in the axial direction is provided on the first protrusion to connect both rotating members. Therefore, if the first rotating member has a smaller diameter than the second rotating member, the second protruding portion can be projected and coupled in the axial direction of the second rotating member, and conversely, the first rotating member can If the diameter is larger than that of the two rotating members, the second protruding portion can be protruded in the centrifugal direction of the second rotating member to be coupled.

When one of the first rotating member and the second rotating member rotates, the first protruding portion and the second protruding portion are engaged in the circumferential direction, so torque transmission is performed via these protruding portions. And the other rotating member also rotates. Further, when the thrust force generated by this rotation acts so as to relatively move both rotary members with respect to both rotary members,
The thrust force acting on one side in the axial direction is received by the side surface of the second protruding portion turning right to the bottom surface of the gap, and
The thrust force acting on the other side in the axial direction is received by the stopper member restricting the movement of the second protrusion. This
At the time of, as a stopper member, axial direction with respect to the first protrusion
First projection of the snap ring that is engaged and attached in the direction
When installing on the outlet, install it on the split part of the snap ring.
The stopper stopper protrusion is axially engaged with the second protrusion.
Let Therefore, the method of separating the second rotating member from the bottom surface of the gap.
The thrust force acting in the direction is the stopper of the snap ring.
It is received by the protrusion.

According to the structure of claim 2, when the ring gear of the planetary gear of the transmission is rotated, the first protrusion is circumferentially engaged with the second protrusion of the second rotating member connected to the ring gear. The output shaft (first rotating member) is rotated by transmitting the torque via the protrusion.

In the structure according to the third aspect, when the ring gear of the planetary gear of the transmission rotates, the plate-shaped second rotating member connected to the inner circumference of the ring gear rotates and is further provided on the inner circumference thereof. Torque is transmitted via the first protrusion that is engaged with the second protrusion to rotate the output shaft, and the torque is transmitted to the outside from the output gear provided on the outer periphery of the output shaft.

In the structure according to the fourth aspect, when the snap ring is attached to the first projection, the stopper projection provided on the split portion of the snap ring is axially engaged with the second projection. Therefore, the thrust force acting in the direction of separating the second rotating member from the bottom surface of the gap is received by the stopper projection of the snap ring.

[0017]

Embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a cross-sectional view showing a rotating member coupling structure of a transmission according to an embodiment of the invention described in claims 3 and 4, and 1 in the drawing is a planetary gear. This planetary gear 1 has a structure generally called a Ravigneaux type, and has two sun gears 2.
3 and two pinions (only one is shown) 4 and one ring gear 5.

An outer circumference of an annular plate (second rotary member) 6 is joined to the inner circumference of the right end of the ring gear 5 in the drawing by welding. As shown in FIG. 2, a plurality of inner teeth (second protruding portions) 6a protruding in the axial direction are provided on the inner periphery of the plate 6 at equal intervals in the circumferential direction.

Returning to FIG. 1, a sleeve-shaped output shaft (first rotating member) 7 is provided on the right side of the plate 6 in the drawing. The output shaft 7 has an inner circumference supported by a bearing 9 provided on a housing 8, and an output gear 7a on the outer circumference.
Are formed. Further, as shown in FIG. 3, the output shaft 7
A lateral tooth (first projecting portion) 7b is axially projected on the left side surface in the figure. The lateral teeth 7b are formed at positions where the outer diameter thereof is slightly smaller than the diameter of the tooth bottom surface of the inner teeth 6a, and the same number as the inner teeth 6a has a gap 7c between them.
And are provided at equal intervals in the circumferential direction. Also,
A snap ring fixing groove 7d is formed on the inner circumference of the lateral tooth 7b.

The plate 6 and the output shaft 7 have the inner teeth 6a of the plate 6 and the lateral teeth 7 of the output shaft 7, respectively.
The gap 7c between b is fitted in the radial direction, and the snap ring 10 is engaged and joined to the snap ring fixing groove 7d. In addition, the snap ring 10
4, as shown in FIG. 4, stopper projections 10a are formed at both ends of the divided portion in the radial direction (centrifugal direction). The stopper projections 10a are formed on the side surface of the plate 6 including the internal teeth 6a as shown in FIG. Engaged.

Therefore, the plate 6 and the output shaft 7 are circumferentially engaged by the inner teeth 6a and the lateral teeth 7b,
Moreover, the thrust force acting on the output shaft 7 in the left direction (arrow L direction) in the figure in the plate 6 (for example, the thrust force generated during forward traveling) is received by the snap ring 10, and the output force is output in the plate 6. The thrust force acting on the shaft 7 in the right direction (the direction of arrow R) in the figure (for example, the thrust force generated at the time of traveling backward) is the gap 7
It is received by the bottom surface 7e (see FIG. 3) of c.

In the structure of the embodiment constructed as described above,
Since the ring gear 5 and the output gear 7a are adjacent to each other as a structure in which the side portion of the output shaft 7 having the output gear 7a is engaged with the inner peripheral portion of the plate 6 coupled to the ring gear 5,
The effect that the dimension in the axial direction can be shortened is obtained. The output gear 7a formed on the output shaft 7 and the lateral teeth 7b have different tooth orientations, and there is a gap (both in the prior art
It is not necessary to form L), and this also has the effect of shortening the axial dimension.

In the structure of this embodiment, the ring gear 5 is fitted with the internal teeth 6a of the plate 6 provided on the inner circumference of the ring gear 5 and the lateral teeth 7b provided on the side surface of the output shaft 7.
The inner diameter of the output gear 7a and the outer diameter of the output gear 7a are substantially equal to each other, or conversely, the outer diameter of the output gear 7a may be smaller.

Further, on the contrary, in the structure in which the outer diameter of the output gear 7a is much larger than the inner diameter of the ring gear 5, like the plate 6 of this embodiment, it is annular and the outer teeth are formed on the outer periphery. The ring gear 5 and the output gear can be structured so that the inner periphery of the formed plate is coupled to the outer periphery of the ring gear 5 and the outer teeth formed on the outer periphery thereof are inserted into the gaps 7c between the lateral teeth 7b of the output shaft 7. There is no restriction on the diameter with 7a, and a high degree of design freedom can be obtained.

Although the embodiment has been described above, the specific structure is not limited to this embodiment, and the present invention includes a design change and the like within a range not departing from the gist of the present invention.

For example, in the embodiment, the coupling between the ring gear 5 of the planetary gear 1 and the output shaft 7 is taken as an example, but the first and second rotating members are not limited to these. Also,
Even in the case of coupling the ring gear 5 and the output shaft 7 in this manner, in the embodiment, the plate 6 as the second rotating member is provided on the inner circumference of the ring gear 5, but the ring gear 5 itself is used as the second rotating member. The inner teeth of the ring gear 5 may be formed as the second protrusions.

Further, as described above, in the embodiment, the example in which the inner teeth 6a as the second projecting portions are provided on the inner circumference of the plate 6 as the second rotating member is shown, but the second projecting portions are provided. The position is determined in relation to the first projecting portion, and when the first rotating member has a large diameter and the outer diameter of the first projecting portion is large, the second projecting portion is provided on the outer periphery of the second rotating member. It may be provided.

Further, in the embodiment, the snap ring 10 is shown as a stopper member which receives the thrust force by restricting the relative movement of the first and second rotating members in the axial direction, but the shafts of the first and second rotating members are shown. Other means such as a split pin may be used as long as it regulates relative movement in the directions.

[0030]

As described above, in the rotating member coupling structure of the transmission according to the first aspect of the present invention, the second rotating member is provided with the second protruding portion that is radially projected. In the gap between the first projecting portions formed by projecting in the axial direction, the second projecting portion is arranged in contact with or close to the bottom surface of the gap, and the second projecting portion and the first projecting portion are circular. A stopper member that engages in the circumferential direction and allows the second protrusion and the bottom surface of the gap to engage in one side in the axial direction, and regulates the movement of the second protrusion in the other axial direction to the first protrusion. Since the connecting structure is such that the first rotating member is connected so that the thrust force of the second rotating member is received by the stopper member, the first rotating member can be connected with a larger diameter or a smaller diameter than the second rotating member. Therefore, the first rotating member and the second rotating member
The rotating member exerts an effect that a high degree of freedom in design can be obtained without mutually limiting the dimensions. Well
Also, as a stopper member, it is axially engaged with the first protrusion.
Split this snap ring using the snap ring
The stopper protrusion that is protruded in the radial direction at the second portion
Since the structure is engaged with the protrusion in the axial direction,
2 Snap the thrust force acting in the axial direction of the rotating member.
It can be reliably received by the stopper protrusion of the ring
The effect is obtained.

According to the structure of claim 2, the second rotating member is connected to the ring gear of the planetary gear of the transmission, and the first rotating member is used as the output shaft of the transmission to connect the ring gear and the output shaft of the transmission. Since this is applied, there is no restriction on the diameter of the ring gear and the output shaft when connecting the ring gear and the output shaft, and a high degree of freedom in design can be obtained.

According to the third aspect of the present invention, the second inner surface of the plate is connected to the inner circumference of the ring gear of the planetary gear of the transmission.
Since the protrusion is formed, the second protrusion is engaged with the first protrusion formed on the output shaft, and the output gear is provided on the outer periphery of the output shaft, the ring gear and the output gear are arranged close to each other. The axial dimension can be shortened. Moreover, in the output shaft, since the machining direction of the output gear and the first protrusion is substantially perpendicular, there is no axial gap between the output gear and the first protrusion. Since it is not necessary to provide it, the size in the axial direction can be shortened, and the effect of high design freedom and the effect of shortening the axial size can be obtained together.

[0033]

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a rotary member coupling structure of a transmission according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a main part of a plate of an example structure.

FIG. 3 is a perspective view showing a main part of an output shaft of the embodiment structure.

FIG. 4 is a front view showing a snap ring of an embodiment structure.

FIG. 5 is a cross-sectional view showing a first conventional technique.

FIG. 6 is a sectional view showing a second conventional technique.

[Explanation of symbols]

5 ring gear 6 plate (second rotating member) 6a Internal teeth (second protrusion) 7 Output shaft (first rotating member) 7a output gear 7b Lateral teeth (first protrusion) 7c gap 7e Bottom 10 snap ring 10a Stopper protrusion

Continuation of front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) F16H 3/00-3/78 F16H 57/00-57/12 F16D 1/06

Claims (3)

(57) [Claims] 1. A first rotary member provided in a transmission, wherein a plurality of first projecting portions projecting in the axial direction are circumferentially provided with a gap between each other, and are coupled to the first rotary member. The second rotating member is provided with a plurality of second projecting portions that are radially inserted into the gap and are engageable with the first projecting portion in the circumferential direction. The second projecting portion of the rotating member is inserted, and the second projecting portion is disposed in contact with or close to the bottom surface of the gap, and the second projecting portion and the first projecting portion are engaged in the circumferential direction and the second projecting portion is formed. A stopper member that allows the first portion and the bottom surface of the gap to engage with each other in the axial direction, and that restricts the movement of the second protruding portion toward the other in the axial direction at the first protruding portion.
And is engaged in the axial direction with respect to the first protruding portion.
It is an attached snap ring, this snap ring
A stopper protrusion in the radial direction is provided on the
A rotary member coupling structure for a transmission, characterized in that a pawl projection is axially engaged with the second projecting portion and is coupled so that a thrust force of the second rotary member is received by a stopper member. 2. The first rotating member is an output shaft of a transmission, and the second rotating member is coupled to a ring gear of a planetary gear provided in the transmission. Rotating member coupling structure of the transmission. 3. An output gear is provided on an outer periphery of a first rotating member that is an output shaft of the transmission, the second rotating member is formed by an annular plate, and an outer periphery of the second rotating member is inside the ring gear. 3. The rotating member connecting structure for a transmission according to claim 2, wherein the second protruding member is formed on the inner circumference of the second rotating member while being connected to the circumference.