JPH0552432U - Snap ring mounting structure - Google Patents

Abstract

(57) [Abstract] [Purpose] When two snap rings are mounted close to a spline of a clutch drum with a thin drum peripheral wall, ensure the strength of the drum peripheral wall at the mounting part and secure both snap rings. Be able to be attached to. [Structure] One snap ring 5 and spline 12
Is engaged with and attached to the outwardly projecting groove 14 formed in the small diameter portion 13 of the spline 12, and the projection 60 is formed on the outer periphery of the other snap ring 6, and the projection 60 is formed in the large diameter portion 15 of the spline 12 with a locking hole. 16 was engaged and attached.

Description

[Detailed description of the device]

[0001]

[Industrial application]

 The present invention relates to a snap ring mounting structure for mounting two snap rings in close proximity to a clutch drum provided in an automatic transmission of an automobile.

[0002]

[Prior Art]

 Due to the design of clutch drums installed in automatic transmissions, splines may be formed on the drum peripheral wall, and clutch devices, planetary gear devices, one-way clutch devices, etc. may be installed side by side on this spline in the axial direction. (For example, Japanese Utility Model Laid-Open No. 62-167959), in which a snap ring is used for axial positioning of each device.

Conventionally, as a structure for attaching a snap ring to a spline of a clutch drum, a structure shown in FIG. 5 is known. In this snap ring mounting structure, a spline 102 is formed on the drum peripheral wall 101 of the clutch drum 100, an outward projecting groove 104 is formed in a small diameter portion 103 of the spline 102, and the outward projecting groove 104 is engaged. Then, the snap ring 200 was attached.

As shown in FIG. 1, the one-way clutch device or the like is axially fixed onto the spline 102 of the clutch drum 100 without using a snap ring. It is known that a step portion 105 is formed and an end portion of the inner race 300 of the one-way clutch device is engaged with the protruding step portion 105.

[0005]

[Problems to be solved by the device]

 By the way, when fixing axially adjacent devices (for example, the clutch device and the planetary gear device) on the spline formed on the drum peripheral wall of the clutch drum in the opposite direction, each device is fixed in the axial direction. The two snap rings are arranged next to each other, but these two snap rings must be mounted close to each other in order to shorten the axial length of the clutch drum.

However, in the above-mentioned conventional snap ring mounting structure, when two snap rings are mounted close to each other, both outward protruding grooves are axially close to each other on the drum peripheral wall of the clutch drum, and If the drum peripheral wall of the clutch drum is thin, there is a problem that the strength of the drum peripheral wall between the two outwardly protruding grooves is reduced and fatigue fracture occurs.

Further, when a step portion is formed by projecting inward without using a snap ring and engaging the step portion, if the drum peripheral wall of the clutch drum is thin, the step of the inward projecting step portion is reduced. Since the width is also small, there is a problem that the engagement by the inward protruding step portion is disengaged when the shaft swings.

In the present invention, focusing on the above problems, when the drum peripheral wall of the clutch drum is thin and two snap rings are mounted close to each other, while securing the strength of the drum peripheral wall at the mounting portion, An object of the present invention is to provide a snap ring mounting structure that can securely mount each snap ring.

[0009]

[Means for Solving the Problems]

 In the present invention, of the two snap rings provided close to each other, one snap ring is attached by engaging with the outward protruding groove formed in the small diameter portion of the spline, and the outer circumference of the other snap ring. The above-mentioned problem was solved by forming a protrusion on the base and engaging the protrusion with a locking hole formed through the peripheral wall of the drum in the large diameter portion of the spline.

That is, the snap ring mounting structure of the present invention is a snap ring mounting structure in which a spline is formed on a drum peripheral wall of a clutch drum, and two snap rings are mounted close to the spline. Of the snap ring is fitted into an outwardly projecting groove formed on the small diameter portion of the spline, and the other snap ring has a protrusion formed on the outer periphery thereof, and the protrusion is formed on the large diameter portion of the spline. It is characterized in that it is attached by engaging with a locking hole formed through the peripheral wall.

[0011]

[Action]

 In the snap ring mounting structure of the present invention, the outward protruding groove for mounting one snap ring is formed in the small diameter portion of the spline, and the locking hole for mounting the other snap ring is formed in the large diameter portion of the spline. Since the outward protruding groove and the locking hole are not axially close to each other on the drum peripheral wall of the clutch drum, the strength of the drum peripheral wall at the mounting portion of each snap ring is prevented from decreasing and the axial length of the clutch drum is reduced. Can be shortened.

Further, since the strength of the drum peripheral wall at the mounting portion of each snap ring is ensured, each snap ring can be securely mounted.

[0013]

【Example】

 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 4 is a partially cutaway sectional view of an automatic transmission having a snap ring mounting structure according to the embodiment, in which 1 is a clutch drum.

In the clutch drum 1, a drum peripheral wall 11 is formed thin, and a spline 12 is formed on the drum peripheral wall 11, and a driven plate 20 of the overrun clutch device 2 and a forward clutch device are formed on the spline 12. The driven plate 30 of No. 3 and the carrier arm 40 of the planetary gear unit 4 are connected in order from the back side.

The driven plate 30 of the forward clutch device 3 is fixed in the axial direction to the left in the drawing by the snap ring 5 via the retainer plate 31, and the carrier arm 40 of the planetary gear device 4 is The axial movement to the right in the drawing is fixed by the snap ring 6, and in this case, the two snap rings 5 and 6 come close to each other in order to shorten the axial length of the clutch drum 1. Are provided.

Next, a mounting structure of the snap rings 5 and 6 will be described with reference to FIGS.

FIGS. 1 and 2 are sectional views showing the mounting structure of one snap ring 5, and the mounting structure in this case is similar to the conventional structure in the small diameter portion 13 of the spline 12 formed on the drum peripheral wall 11. An outward protruding groove 14 is formed, and the outer peripheral portion of the snap ring 5 is engaged with and attached to the outward protruding groove 14.

1 and 3 are sectional views showing the mounting structure of the other snap ring 6, in which case the drum peripheral wall 11 is passed through the large diameter portion 15 of the spline 13 formed on the drum peripheral wall 11. A stop hole 16 is formed, a protrusion 60 is formed on the outer periphery of the snap ring 6 at an interval corresponding to the large diameter portion 15 of the spline 13, and the snap ring 6 is engaged with the locking hole 16 in the snap ring 6. It has a structure in which 6 is attached.

Next, the operation of the embodiment will be described.

In the snap ring mounting structure of this embodiment, the outward projecting groove 14 for mounting one snap ring 5 is formed in the small diameter portion 13 of the spline 12, and the locking hole 16 for mounting the other snap ring 6 is the spline. Since it is formed in the large diameter portion 15 of 12, the outward protruding groove 14 and the locking hole 16 do not come close to each other on the drum peripheral wall 11 of the clutch drum 1 in the axial direction.

Therefore, it is possible to prevent the strength of the drum peripheral wall 11 from being lowered at the mounting portions of the snap rings 5 and 6. Therefore, the two snap rings 5 and 6 can be provided close to each other in the axial direction, and the axial length of the clutch drum 1 can be shortened.

Further, since the strength of the drum peripheral wall 11 at the mounting portion of each snap ring 5, 6 is secured, each snap ring 5, 6 can be securely mounted.

Although the embodiment of the present invention has been described above with reference to the drawings, the specific configuration is not limited to this embodiment.

[0024]

[Effect of the device]

 As described above, in the snap ring mounting structure of the present invention, one snap ring is engaged with the outward protruding groove formed in the small diameter part of the spline, and the other snap ring is connected to the large spline. Since the structure is such that it can be mounted by engaging with the locking hole that is formed through the diameter part, the engagement margin with each snap ring can be increased to ensure reliable attachment, and the outward protruding groove and the locking hole The two snap rings can be installed in close proximity to each other in the axial direction of the clutch drum while preventing their strength from decreasing in the axial direction on the drum peripheral wall of the clutch drum. The effect that the length can be shortened is obtained.

[Brief description of drawings]

FIG. 1 is a sectional view showing a mounting structure of a snap ring according to an embodiment.

FIG. 2 is a cross-sectional view showing a mounting structure of one snap ring.

FIG. 3 is a cross-sectional view showing a mounting structure of the other snap ring.

FIG. 4 is a partially cutaway sectional view showing a main part of an automatic transmission having a snap ring mounting structure according to an embodiment.

FIG. 5 is a cross-sectional view of the prior art.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Clutch drum 11 Drum peripheral wall 12 Spline 13 Small diameter part 14 Outward protruding groove 15 Large diameter part 16 Locking hole 5 Snap ring 6 Snap ring 60 Protrusion

Claims (1)

[Scope of utility model registration request] 1. A snap ring mounting structure in which a spline is formed on a drum peripheral wall of a clutch drum, and two snap rings are mounted close to the spline, wherein one snap ring is attached to a small diameter portion of the spline. The other snap ring is attached by engaging with the formed outward protruding groove, and the other snap ring has a protrusion formed on the outer periphery, and the protrusion has a locking hole formed by penetrating the drum peripheral wall in the large diameter portion of the spline. A snap ring mounting structure characterized in that the snap ring mounting structure is engaged with and mounted to.