JPH11166553A - Spline device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily and freely adjust the clearance of a spline part by dividing a boss part or a spline shaft part, and rotating and displacing the divided members in the mutually opposite direction around the axis. SOLUTION: A spline part is put in a coaxially connected state of a first spline shaft member 16 to a second spline shaft member 18 through a shaft part 28. A tip part 48 of a screw member 50 presses an inclined face of a recess part 30 formed in the shaft part 28 when a screwing-in quantity of the screw member 50 is increased by applying a clearance adjusting mechanism 21 to screw the screw member 50 in a screw hole 46 formed in a cylindrical part 34 of the second spline shaft member 18 in this state. A circumferential directional clearance A between a second tooth part 40 and a third tooth part formed on an inner peripheral wall of a boss part 14 can be freely adjusted by rotating and displacing a first spline shaft member 16 side first tooth part by a prescribed angle in the same circumferential direction to the second spline shaft member 18 side second tooth part 40 according to this.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spline device having a function of preventing the spline shaft from rotating in the circumferential direction by engaging the spline shaft with a hole of a boss, for example.

[0002]

2. Description of the Related Art Conventionally, for example, a spline has been used as a detent in a circumferential direction of a shaft member. As shown in FIG. 13, the spline 1 is spaced apart by a predetermined angle and is provided between adjacent groove portions 2a to 2h.
Are provided slidably along a plurality of spline shafts 4 along the circumferential direction of the outer peripheral surface and along the axial direction of the spline shaft 4, and a cross section in a direction perpendicular to the axis of the spline shaft 4 is provided. And a boss 6 in which a hole 5 having a shape corresponding to the shape is formed.

In this case, a spline shaft 4 extending in the circumferential direction
As shown in FIG. 14, a predetermined clearance A is formed between the teeth 3a to 3h and the inner wall surface of the hole 5 of the boss 6 corresponding to the teeth 3a to 3h. The clearance A is formed by forming the spline shaft 4 by, for example, rolling or the like, and forming the boss 6 by, for example, drawing or the like, and then forming the teeth 3a to 3 of the spline shaft 4.
h and the inner wall surface of the hole 5 of the boss 6 is formed by finishing.

[0004]

However, in such a spline according to the prior art, the clearance A varies due to an error in machining accuracy, or the clearance A set in advance to a predetermined value does not correspond to the spline shaft. Abrasion is caused by sliding friction between the tooth portion and the inner wall surface of the boss, and when the clearance A increases from a predetermined value, play occurs when the spline shaft and the boss relatively slide and displace in the axial direction. There is an inconvenience.

SUMMARY OF THE INVENTION The present invention has been made to overcome the above-mentioned inconvenience, and simply and freely adjusts a clearance between a tooth portion of a spline shaft and an inner wall surface of a hole of a boss along a circumferential direction. It is an object of the present invention to provide a spline device capable of performing such operations.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a boss or a spline shaft which is slidably provided along the axial direction. A clearance adjusting mechanism that divides the divided members and rotationally displaces the divided members in opposite directions about an axis as a rotation center, thereby adjusting a circumferential clearance between an inner wall surface of the boss portion and an outer wall surface of the spline shaft portion. Is provided.

According to the present invention, the inner wall surface of the boss portion is rotated by displacing the first and second spline shaft members, which are divided into two, in mutually opposite directions about the axis as the center of rotation. And the circumferential clearance between the spline shaft portion and the outer wall surface can be adjusted.

The first and second boss members, which are divided into two, are rotationally displaced in opposite directions about the axis as a center of rotation, so that the inner wall surface of the boss portion and the outer surface of the spline shaft portion are displaced. The circumferential clearance with the wall surface can be adjusted.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of a spline device according to the present invention will be described below in detail with reference to the accompanying drawings.

In FIG. 1, reference numeral 10 denotes a spline device according to an embodiment of the present invention.

This spline device 10 is provided with a boss 14 having a substantially circular cross section and having a hole 12 penetrating along the axial direction, and a boss 14 slidably provided along the hole 12. The first spline shaft member 16 and the second spline shaft member 18 are formed coaxially, and are formed between the inner wall surface of the boss portion 14 and the outer wall surface of the spline shaft portion 20. And a clearance adjustment mechanism 21 for adjusting the clearance A in the circumferential direction.

As shown in FIG. 2, the first spline shaft member 16 is formed with a plurality of first teeth 24 having a rectangular cross section along the circumferential direction of the outer peripheral surface between adjacent groove portions 22 separated by a predetermined angle. A disk portion 26 and a shaft portion 28 protruding outward from the center of one plane of the disk portion 26, and the disk portion 26 and the shaft portion 28 are integrally formed. You. As shown in FIG. 3, a recess 30 having a tapered cross section is formed in the shaft 28.

As shown in FIG. 2, the second spline shaft member 18 has a cylindrical portion 34 having a hole 32 into which the shaft portion 28 of the first spline shaft member 16 is inserted, It has a flange portion 36 formed at one end along the axial direction, and the cylindrical portion 34 and the flange portion 36 are integrally formed. On the outer peripheral surface of the flange portion 36, a plurality of second tooth portions 40 having a rectangular cross section are formed along the circumferential direction between adjacent groove portions 38 separated by a predetermined angle.

The first spline shaft member 16 and the second spline shaft member 18 are coaxially connected to each other via a shaft portion 28 inserted into the hole 32, and the disk portion of the first spline shaft member 16 is provided. 26 and the second spline shaft member 1
The diameter of the flange portion 36 is substantially the same as that of the flange portion 8.

In the present embodiment, the pitches of the first teeth 24 and the second teeth 40 formed on the first spline shaft member 16 and the second spline shaft member 18 are set to be substantially the same. However, the present invention is not limited to this, and the pitch between the first teeth 24 and the second teeth 40 may be different.

The inner peripheral surface of the boss portion 14 has a shape corresponding to the plurality of grooves 22, 38, the first tooth portion 24, and the second tooth portion 40 of the first spline shaft member 16 and the second spline shaft member 18. A third tooth portion 42 and a groove portion 44 are formed. That is, a plurality of grooves 22 and first teeth 24 formed on the outer peripheral surface of the disk portion 26 of the first spline shaft member 16 and the flanges of the second spline shaft member 18 are formed on the inner peripheral surface of the boss portion 14. A third portion meshing with a groove 38 and a second tooth portion 40 formed on the outer peripheral surface of the portion 36, respectively.
The teeth 42 and the grooves 44 are formed.

The clearance adjusting mechanism 21 is screwed into a screw hole 46 formed in the cylindrical portion 34 of the second spline shaft member 18, so that a tip portion 48 is formed on the shaft portion 28 of the first spline shaft member 16. A screw member 50 is provided which comes into contact with the formed depression 30 (see FIG. 3). The distal end portion 48 of the screw member 50 is formed to have a tapered cross section.
The zero end portion 48 is displaced in the direction of arrow B along the inclined surface of the concave portion 30, and the first spline shaft member 16 can be rotated by a predetermined angle in the direction of arrow C with respect to the second spline shaft member 18. . As a result, the first spline shaft member 16 has the first tooth portion 40 with respect to the second tooth portion 40 of the second spline shaft member 18.
The tooth portion 24 is displaced by a predetermined angle along the same circumferential direction.

As shown in FIGS. 5 and 6, the first spline shaft member 16 and the second spline shaft member 18 are bolts 54 which engage with arc-shaped long holes 52 formed in the flange portion 36. Are respectively fixed through.

The spline device 10 according to the embodiment of the present invention is basically configured as described above. Next, the operation and effect of the spline device will be described.

First, as shown in FIG. 7A, when the spline shaft portion 20 is set to be slidable along the axial direction (the direction of arrow D) with respect to the fixed boss portion 14, The basic principle of adjusting the clearance A between the teeth on the part 20 side and the teeth on the boss part 14 will be described.

As can be understood from FIG. 7B, the spline shaft portion 20 is divided into two, and the divided first spline shaft member 16 and second spline shaft member 18 are respectively opposed to each other in the circumferential direction (the direction of arrow E). And arrow F direction)
, The clearance A between the teeth on the spline shaft 20 and the teeth on the boss 14 can be freely adjusted.

Next, a case where the clearance A is adjusted based on the present embodiment will be described.

The first spline shaft member 1 is connected via the shaft portion 28.
When the screw member 50 and the second spline shaft member 18 are coaxially connected to each other, by increasing the screwing amount of the screw member 50, the distal end portion 48 of the screw member 50 is
Press the inclined surface of.

Accordingly, as shown in FIG. 8, the first teeth 24 of the first spline shaft member 16 are arranged in the same circumferential direction as the second teeth 40 of the second spline shaft member 18. By rotating and displacing by a predetermined angle (see a two-dot chain line),
The circumferential clearance A between the boss portion 14 and the third tooth portion 42 formed on the inner wall surface can be freely adjusted.

The circumferential clearance A between the first and second tooth portions 24 and 40 of the spline shaft portion 20 and the third tooth portion 42 of the boss portion 14 is positive as shown in FIG. It is possible to adjust the clearance A in any circumferential direction.

As described above, in the present embodiment, by providing the clearance adjusting mechanism 21, it is possible to eliminate the variation in the clearance A caused by an error in the processing accuracy, and to reduce the boss portion of the tooth portion of the spline shaft portion 20. Rattling caused by sliding friction with the inner wall surface of the vehicle can be prevented.

When the first spline shaft member 16, the second spline shaft member 18, and the boss portion 14 are extruded using a metal material such as an aluminum material, for example, the outer wall surface of the spline shaft portion 20 and the boss portion are formed. By freely adjusting the clearance A generated between the sliding portions of the portion 14 and the inner wall surface by the clearance adjusting mechanism 21, the manufacturing process can be simplified and the manufacturing cost can be reduced.

Next, a spline device 60 according to another embodiment of the present invention is shown in FIG. The same components as those of the spline device 10 shown in FIG. 1 are denoted by the same reference numerals, and a detailed description thereof will be omitted.

The spline device 60 has a first boss member 62 and a second boss member 64 divided into two parts.
The boss 68 is coaxially fitted via the shaft 66, the spline shaft 70, and the screw member 50 functioning as the clearance adjusting mechanism 21.

First boss member 62 and second boss member 64
A first hole 72 and a second hole 74 penetrating along the axial direction are formed inside the first hole 72, and the first hole 72 and the second hole 74 are provided with a plurality of grooves 22, 38 and a second hole 74. The 1st tooth part 24 and the 2nd tooth part 40 are each formed (refer FIG. 10).

First, when the boss 68 is set to be slidable along the axial direction (the direction of arrow G) with respect to the fixed spline shaft 70, the spline shaft 7
FIGS. 11A to 11C show the basic principle of adjusting the clearance A between the tooth portion on the 0 side and the tooth portion on the boss portion 68 side.

As can be understood from FIGS. 11A to 11C, the boss 68 is divided into two parts, and the divided first boss member 62 and second boss member 64 are respectively opposed to each other in the circumferential direction (the direction of arrow H). (In the direction of arrow I) by a predetermined angle.
The clearance A between the 0-side tooth portion and the boss portion 68-side tooth portion can be freely adjusted.

Next, a case in which the clearance A is adjusted based on another embodiment will be described.

The first boss member 62 and the second boss member 62 are
In a state where the boss member 64 and the boss member 64 are connected coaxially, by increasing the screwing amount of the screw member 50, the distal end portion 48 of the screw member 50 presses the inclined surface of the recess 30.

Therefore, as shown in FIG. 12, the second teeth 4 on the side of the second boss member 64 formed on the inner wall surface, respectively.
When the first tooth portion 24 on the first boss member 62 side is rotated by a predetermined angle along the same circumferential direction with respect to 0, the third tooth portion 42 formed on the outer wall surface of the spline shaft portion 70 and Can be freely adjusted in the circumferential direction A.

In the embodiment shown in FIG. 1, the clearance A is adjusted by rotating the first tooth portion 24 or the second tooth portion 40 provided on the outer wall surface of the spline shaft portion 20 by a predetermined angle. On the other hand, in the other embodiment, the clearance A is adjusted by rotating the first tooth portion 24 or the second tooth portion 40 provided on the inner wall surface of the boss portion 68 by a predetermined angle. Is different. Note that other functions and effects are substantially the same as those of the above-described embodiment, and thus detailed description thereof will be omitted.

[0037]

According to the present invention, the following effects can be obtained.

That is, by providing the clearance adjusting mechanism, it is possible to eliminate the variation in the clearance caused by the error of the processing accuracy and to prevent the play caused by the sliding friction between the spline shaft portion and the boss portion. .

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view along an axial direction of a spline device according to an embodiment of the present invention.

FIG. 2 is a partially cutaway sectional view of a first spline shaft member and a second spline shaft member that constitute the spline device of FIG. 1;

FIG. 3 is a view as seen from the direction of the arrow X shown in FIG. 1;

FIG. 4 is an explanatory diagram showing an operation of a clearance adjustment mechanism constituting the spline device of FIG. 1;

FIG. 5 is a longitudinal sectional view of a first spline shaft member and a second spline shaft member along an axial direction.

FIG. 6 is a longitudinal sectional view taken along the line VI-VI shown in FIG.

FIG. 7A and FIG. 7B are explanatory diagrams each showing a basic principle.

FIG. 8 is an enlarged view of a main part showing the operation of the clearance adjustment mechanism.

FIG. 9 is a longitudinal sectional view along an axial direction of a spline device according to another embodiment of the present invention.

FIG. 10 is a longitudinal sectional view showing a first boss member and a second boss member constituting the spline device of FIG. 9;

11A to 11C are explanatory diagrams each showing a basic principle.

FIG. 12 is an enlarged view of a main part showing an operation of a clearance adjustment mechanism.

FIG. 13 is a front view showing a spline according to the related art.

FIG. 14 is a partially enlarged view of the spline shown in FIG. 13;

[Explanation of symbols]

10, 60 ... Spline device 14, 68 ...
Boss part 16, 18 ... Spline shaft member 20, 70 ...
Spline shaft part 21: clearance adjustment mechanism 24, 40,
42 ... tooth part 30 ... hollow part 48 ... tip part 50 ... screw member 52 ... long hole 54 ... bolt

Claims (4)

[Claims] 1. One of a boss portion and a spline shaft portion slidably provided along an axial direction is divided into two, and the divided members are opposed to each other with the axis as a center of rotation. A spline device provided with a clearance adjustment mechanism that adjusts a circumferential clearance between an inner wall surface of the boss portion and an outer wall surface of the spline shaft portion by rotationally displacing in a direction. 2. A device according to claim 1, wherein said clearance adjusting mechanism comprises a screw member abutting on a concave portion having a tapered cross section, and one end of said screw member is engaged with an inclined surface of said concave portion. Spline device characterized by being formed in a tapered shape as described above. 3. The spline shaft according to claim 1, wherein the spline shaft portion comprises a first spline shaft member and a second spline shaft member divided into two, and is formed on an outer peripheral surface of the first spline shaft member. The first tooth portion and the second tooth portion formed on the outer peripheral surface of the second spline shaft member are relatively rotated and displaced so that the circumferential direction between the inner wall surface of the boss portion and the outer wall surface of the spline shaft portion. A spline device characterized by adjusting the clearance of the spline. 4. The apparatus according to claim 1, wherein the boss portion is
The first boss member and the second boss member are divided into two, and a first tooth portion formed on an inner peripheral surface of the first boss member and a second tooth formed on an inner peripheral surface of the second boss member. A spline device characterized by adjusting a circumferential clearance between an inner wall surface of a boss portion and an outer wall surface of a spline shaft portion by relatively rotating and displacing a tooth portion.