JPH0610232Y2 - One-way clutch outer race fixed structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field of the Invention> The present invention relates to an outer race fixing structure for a one-way clutch fixed inside a housing of an automatic transmission for automobiles, for example.

<Prior Art> Conventionally, as a fixing structure of the outer race 10 of the one-way clutch, for example, those shown in FIGS. 5 and 6 are known.

This conventionally known one-way clutch outer race 1
In the configuration of the fixing structure of 0, a spline protrusion 12 is formed on the outer peripheral surface of the outer race 10 of the one-way clutch by the outer race 10 and the inner race 20 with the clutch mechanism interposed, and the spline protrusion 12 and the housing 30 of the automatic transmission are arranged. The spline groove 32 formed on the inner surface of the was fixed by spline fitting.

Here, 50 is a roller having a one-way clutch function, 60 is a side plate attached to the side surface of the outer race 10, 70 is a spring in contact with the idle direction side of the roller 50, 80 is a mounting plate of the spring 70, 90
Is a slanted inner surface in which the gap between the outer race 10 and the inner race 20 is enlarged as it goes in the idling direction (direction of arrow A), and 100 is a snap ring for axially positioning the housing 30 and the outer race 10. Is.

However, in the fixing structure of the outer race 10 of the conventional one-way clutch described above, the fixing is performed by spline fitting in which a large number of spline protrusions 12 and spline grooves 32 must be fitted at the same time.
Further, since the housing 30 of the automatic transmission is a cast product that may cause product variations, the spline protrusion 1
Between the 2 and the spline groove 32, circumferential gaps a and b are set in order to improve the assembling property of the product.

When an automatic transmission adopting such a one-way clutch outer race 10 fixing structure is mounted on a vehicle and used, when the one-way clutch rotates in the idling direction (direction of arrow A), the drag torque of the roller 50 causes The outer race 10 rotates in the idling direction, and the idling side wall B2 of the spline projection 12 comes into contact with the idling side wall B1 side of the spline groove 32. From this state, the one-way clutch performs the locking operation (arrow direction). When rotated in the B direction), the locking side wall A2 of the spline protrusion 12 rotates toward the locking side wall A1 side of the spline groove 32 by the circumferential clearance a + b. At this time, the side wall A2 of the spline protrusion 12 in the lock direction collides violently with the side wall A1 of the spline groove 32 in the lock direction, which may cause abnormal noise such as rattling noise.

When the one-way clutch rotates at high speed in the idling direction (arrow A direction), the vibration generated by the rotation is transmitted to the outer race 10 and the side wall A of the spline projection 12 is transmitted.
2 and B2 and the side walls A1 and B1 on both sides of the spline groove 32 are repeatedly brought into contact with each other and separated from each other, and there is a possibility that an abnormal sound may be generated as in the above-mentioned state.

In order to solve such a problem, the actual exploitation Sho 59-17
An improved structure of the outer race fixing structure as described in Japanese Patent No. 333 is known.

In this improved structure, a cushioning member for urging the housing 30 and the outer race 10 in opposite rotational directions by elastic force is provided, and the spline projection 12 of the outer race 10 is urged by the cushioning member. The housing 30 is pressed against the side wall A1 of the spline groove 32 in the locking direction so that the circumferential clearances a and b do not change regardless of the rotating state of the one-way clutch.

The cushioning member is formed of a spring plate and includes a resiliently bent portion and a mounting portion that are bent in multiple layers, and the mounting portion serves as the spline projection 12 of the outer race 10.
The elastic member is arranged in the narrow gaps a and b between the spline groove 32 of the housing 30 and the spline protrusion 12 of the outer race 10.

<Problems to be Solved by the Present Invention> According to the improved structure as described above, the outer race 10
Since the circumferential clearances a and b between the spline projections 12 and the spline grooves 32 of the housing 30 do not change regardless of the rotation state of the one-way clutch, the problem of abnormal noise is solved, but the outer race is eliminated. Since the cushioning member is attached to the spline protrusion 12 of 10, the cushioning member is attached to the spline protrusion 12 in a step before the outer race 10 and the housing 30 are fitted and assembled, and the cushioning member is provided in the narrow gaps a and b. Since it was necessary to fit and assemble the outer race 10 and the housing 30 while keeping the elastic parts of all the cushioning members in a compressed state so that the elastic parts of It was likely to be complicated. In addition, since the cushioning member is not integrated with the outer ring, it is easy to pull out and care must be taken in handling.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and it is an object of the present invention to prevent generation of abnormal noise due to collision with the spline projection 12 and the spline groove 32 without degrading the assembling property of the one-way clutch. And

<Means for Solving the Problems> In order to solve the above problems, the present invention has a cushioning member supported on a side plate in the fixing structure of the outer race of the one-way clutch described above.

<Operation> Since the housing and the outer race are equipped with the cushioning members for urging the housing and the outer race in opposite rotational directions by elastic force, the outer race rotates in the idling direction by the drag torque of the roller when the one-way clutch idles. Even if an attempt is made, the spring force of the cushioning member does not change the circumferential clearance. Therefore, even if the one-way clutch rotates in the locking direction that causes the lock operation from that state, the circumferential clearances on both sides of the spline projection and the spline groove do not change, and the spline projection does not rotate in the circumferential direction. The protrusion does not collide with the side wall of the spline groove in the locking direction, and abnormal noise such as rattling noise does not occur.

In addition, even if the one-way clutch rotates at high speed in the idling direction and the vibration generated by the rotation is transmitted to the outer race, the gap width in the circumferential direction between the spline projection and the spline groove does not change. However, no abnormal sound is generated.

Further, since the cushioning member is supported by the side plate attached to the side surface of the outer race, when the outer race and the housing are fitted and assembled together, the work can be performed without considering the engagement between the cushioning member and the spline groove. Can be done
After that, the cushioning member attached to the side plate can be inserted into and engaged with the spline groove. Therefore, it becomes possible to retrofit the cushioning member to the spline groove,
It is possible to simplify the assembly work.

<Embodiment> An embodiment of the present invention will be described below with reference to the accompanying drawings.
In the description of the embodiments of the present invention, the one-way clutch used in the automatic transmission for automobiles will be described, but it goes without saying that the one-way clutch used for other purposes can also be used. .

1 and 2 show an outer race fixing structure for a one-way clutch which is an embodiment of the present invention.

In the figure, the clutch mechanism is composed of a plurality of rollers 50 interposed between the outer race 10 and the inner race 20.
And the spring 7 contacting the idling direction side of the roller 50.
0, a mounting plate 80 of the spring 70, and an inclined inner surface 90 in which the gap between the outer race 10 and the inner race 20 is enlarged as it goes in the idling direction (direction of arrow A).

Further, a large number of spline protrusions 12 are formed on the outer peripheral surface of the outer race 10, and the outer race 10 and the inner race 20 are held by bearing fittings (not shown) so as not to contact each other.

Further, ring-shaped side plates 60 are attached to both side surfaces of the outer race 10 by attachment fittings (not shown).

Here, 100 is the housing 30 and the outer race 10.
It is a snap ring for performing axial positioning with respect to and also has a function of preventing the cushioning member 40 from falling off, which will be described later.

One-way clutch outer race 1
0 and its housing 30 are the spline projection 12 and the housing 30 formed on the outer peripheral surface of the outer race 10.
Is spline-fitted by a spline groove 32 formed on the inner circumferential surface of the cushioning member 40, and the cushioning member 40 is provided in the idle direction gap between the spline protrusion 12 and the spline groove 32.
Is installed.

The cushioning member 40 is formed of a wire material having a spring property, is held in a recess (cut-in portion) 14 formed on the cushioning member 40 mounting side of the outer race 10, and one end thereof is a spline. The gap on the idling direction side between the projection 12 and the spline groove 32 extends in the axial direction of the one-way clutch, and the other end side is held by the outer peripheral portion of the side plate 60. The intermediate portion 42 extends substantially on the radial line of the one-way clutch.

The other end of the cushioning member 40 is bent in the circumferential direction of the side plate 60 and is inserted into a bent portion 62 extending outward in the radial direction from the outer peripheral edge of the side plate 60. Further, the outermost end thereof is bent outward in the radial direction so as to prevent it from coming off.

Here, the position of the idling direction side wall B1 of the spline groove 32 of the housing 30 and the position of the idling direction side end of the bent portion 62 of the side plate 60 are set to be substantially close to each other in the circumferential direction.

At this position, with the cushioning member 40 inserted in the gap of the spline fitting portion, the idling direction side end of the bent portion 62 of the side plate 60 is the reaction point D, and the idling direction side wall of the spline groove 32 is the action point. Needless to say, C is a position where elastic force can be exerted so as to separate the both in the circumferential direction.

The cushioning member 40 is in the position shown by the dotted line in FIG. 1 before being inserted into the gap of the spline fitting portion of the housing 30, and when it is inserted into the spline fitting portion, it is deformed to the position shown by the solid line. , The spline projection 12 of the outer race 10 is inserted into the spline groove 32, the locking direction side wall A of the spline groove 32 of the housing 30.
It has the effect of pressing it against 1.

Therefore, the circumferential clearance between the spline projection 12 and the spline groove 32 is kept constant, so that the one-way clutch rotates from the idling direction (arrow A direction) to the lock direction (arrow B). Direction), no abnormal noise such as rattling noise caused by the collision of the spline groove 12 of the spline protrusion 12 with the locking direction side wall A2 of the spline groove 32 is generated. Further, even if the one-way clutch rotates at high speed in the idling direction and vibration due to the rotation occurs, no abnormal noise due to looseness in the circumferential direction between the spline projection 12 and the spline groove 32 is generated.

In order to prevent the circumferential clearance of the spline fitting portion from changing during idling of the one-way clutch, the elastic force of the buffer member 40 is applied to the drag torque of the one-way clutch (when the inner race 20 rotates in the idling direction). Needless to say, it is necessary to set the roller 50 so that it can withstand the torque generated in the outer race 10 by pulling the outer race 10.

Further, since the cushioning member 40 is supported by the side plate 60 attached to the side surface of the outer race 10, when the outer race 10 and the housing 30 are fitted and assembled, the cushioning member 40 and the spline groove 32 are engaged with each other. The work can be performed without consideration, and thereafter, the cushioning member 40 attached to the side plate 60 can be inserted and engaged with the spline groove 32. Therefore, the assembling work can be simplified.

FIG. 3 and FIG. 4 show another embodiment of a one-way clutch outer race fixing structure according to the present invention. In this embodiment, the cushioning member 40 and the side plate 6 are
Since the configuration other than 0 is the same as that of the first embodiment of the present invention described above, the description of the overlapping portions will be omitted.

In the figure, the cushioning member 40 is formed of a spring wire material and is held in a recess 14 formed on the cushioning member 40 mounting side of the outer race 10, and both end sides thereof are the circumference of the side plate 60. It extends upward, extends outward in the radial direction from the outer peripheral edge of the side plate 60, and is inserted into two bent portions 64, 66 formed so as to be spaced apart in the circumferential direction. The intermediate portion 42 is formed into a letter-shaped convex portion, and is inserted into and engaged with the spline groove 32 of the housing 30.

Of the bent portions 64 and 66 of the side plate 60, the position of the idling direction side end of the bent portion 64 on the lock direction side and the position of the lock direction side wall A1 of the spline groove 32 of the housing 30 are substantially close to each other in the circumferential direction. It has been set to the position.

At this position, the cushioning member 40 is inserted into and engaged with the spline groove 32 of the housing 30, and the idling direction side wall B1 of the spline groove 32 of the housing 30 is operated in a state where the circumferential width of the intermediate portion 42 is reduced. It is needless to say that the point C is set, and the end portion of the bent portion 64 of the side plate 60 on the idling direction side is set as the reaction point D so that the elastic force can be exerted so as to separate the two in the circumferential direction.

Before being inserted into the spline groove 32 of the housing 30, the intermediate portion 42 of the cushioning member 40 is wider than the circumferential width of the spline groove 32. Since the circumferential width is reduced, the spline projections 12 of the outer race 10 can be inserted into the housing 3 while being inserted into the spline groove 32.
There is an effect of pressing the spline groove 32 of 0 to the side wall A1 in the locking direction. Therefore, the circumferential clearance between the spline projection 12 and the spline groove 32 is kept constant, so that the one-way clutch rotates from the idling direction (arrow A direction) to the lock direction (arrow B). Direction), an abnormal noise such as a rattling noise due to the collision of the spline groove 32 of the spline protrusion 12 with the locking direction side wall A1 does not occur. Further, even if the one-way clutch rotates at high speed in the idling direction and vibration due to the rotation occurs, no abnormal noise due to looseness in the circumferential direction between the spline projection 12 and the spline groove 32 is generated.

Further, since the cushioning member 40 is supported by the side plate 60 attached to the side surface of the outer race 10 and can be rotated about both the bent portions 64 and 66 as pivots, the outer race 10 and the housing 30 are fitted together. At the time of assembling and assembling, the work can be performed without considering the engagement between the cushioning member 40 and the spline groove 32, and thereafter,
The buffer member 40 attached to the side plate 60 is attached to the intermediate portion 4 thereof.
2 can be inserted and engaged with the spline groove 32 so as to sandwich it. Therefore, the assembling work can be simplified.

When attaching the cushioning member 40 to the side plate 60, the intermediate portion 42 of the cushioning member 40 is sandwiched, and both ends thereof are attached to the side plate 6.
Since the buffer member 40 need only be inserted into the bent portions 64 and 66 of the housing 0, the cushioning member 40 can be inserted into the spline groove 32 of the housing 30.
At the same time as the work of inserting into the inside, the bent portion 6 of the side plate 60
Both end portions of the cushioning member 40 may be inserted into the inside of 4, 66.
In this case, the work of assembling the one-way clutch can be further simplified.

Although the embodiments of the present invention have been described above, the outer race fixing structure for a one-way clutch of the present invention is not limited to the use of the one-way clutch, and the one-way clutch mechanism has a sprag having a short diameter portion and a long diameter portion. Can be used in various types such as a type in which the outer race 10 and the inner race 20 are interposed.

Further, the cushioning member 40 is not limited to a wire rod having a spring property, and various types of materials such as a plate member having a spring property, a cushion rubber, and a cushion resin can be used. Further, the shape of the cushioning member 40 is not limited to the shape of the cushioning member 40 of the embodiment, and may be any shape as long as it is supported by the side plate 60.

<Effect of the Invention> As described above in detail, according to the outer race fixing structure of the one-way clutch according to the present invention, the cushioning member for urging the housing and the outer race in the opposite rotational directions by the elastic force. Therefore, even if the outer race tries to rotate in the idling direction due to the drag torque of the roller during idling of the one-way clutch, the spring force of the cushioning member does not reduce the gap in the idling direction. Therefore, even if the one-way clutch rotates from that state in the locking direction for locking work, the circumferential clearance between the spline projection and the spline groove does not change, and the spline projection does not rotate in the circumferential direction. The protrusion does not collide with the side wall of the spline groove in the locking direction, and abnormal noise such as rattling noise does not occur.

In addition, even if the one-way clutch rotates at high speed in the idling direction and the vibration generated by the rotation is transmitted to the outer race, the gap width in the circumferential direction between the spline projection and the spline groove does not change. However, no abnormal noise is generated.

Further, since the cushioning member is supported by the side plate attached to the side surface of the outer race, when the outer race and the housing are fitted and assembled together, the work can be performed without considering the engagement between the cushioning member and the spline groove. Can be done
After that, the cushioning member attached to the side plate can be inserted into and engaged with the spline groove. Therefore, the assembling work can be simplified.

[Brief description of drawings]

FIG. 1 is a view showing an embodiment of the present invention, FIG. 2 is a sectional view of an essential part of FIG. 1, FIG. 3 is a view showing another embodiment of the present invention, and FIG.
FIG. 5 is a cross-sectional view of the main part of FIG. 3, FIG. 5 is a view showing a conventional example, and FIG. 6 is a cross-sectional view of the main part of FIG. (Explanation of symbols) 10 ... Outer race 12 ... Spline protrusion 20 ... Inner race 30 ... Housing 32 ... Spline groove 40 ... Buffer member 50 ... Roller 60 ... Side plate 62, 64, 66 ... Bending Department

Claims (1)

[Scope of utility model registration request] 1. A spline projection is formed on an outer peripheral surface of an outer race of a one-way clutch, and the spline projection and a spline groove formed on an inner surface of the housing are fixed by spline fitting, so that the housing and the outer race are elastic. In the outer race fixing structure of the one-way clutch in which the side plates are integrally attached to the side surfaces of the outer race, the cushion members are supported by the side plates attached to the outer race. An outer race fixing structure for a one-way clutch, wherein the spline projection of the outer race is pressed against the spline groove of the housing by the elasticity of the cushioning member.