JPH0514653U - Two-way differential clutch overload input prevention structure - Google Patents

Abstract

(57) [Summary] [Purpose] To prevent damage to the two-way differential clutch during overload. A rotary shaft 1 of a two-way differential clutch having a plurality of sprags and capable of transmitting the rotation of the input gear to the rotary shaft through the sprags only when the input gear rotates faster than the rotary shaft. Taper surface 1b
Is formed, and an output gear 9 having a tapered cone portion 9a slidably contacting the tapered surface 1b on the inner peripheral surface is provided on the outer periphery of the rotary shaft 1, and the output gear 9 is fixed by the disc spring 12 fixed to the rotary shaft 1. It is pressed against the tapered surface 1b.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a structure for preventing overload input in a two-way differential clutch.

[0002]

[Prior art and its problems]

 2. Description of the Related Art Conventionally, a two-way differential clutch used in a power transmission path of an automobile or the like has a structure shown in a longitudinal sectional view in FIG. 2 and a half sectional view taken along the line AA in FIG. An input gear 2 is rotatably provided on the outer periphery of a rotary shaft 1 that is rotatably provided via a bearing. The input gear 2 is rotatably provided on the outer periphery of the rotary shaft 1 and the input gear 2. A plurality of sprags 8, 8 and 8 are provided at predetermined intervals between the inner peripheral surfaces, and each of the sprags 8, 8 and 8 is fixed to the inner peripheral surface of the input gear 2 via a pin 7. The inner holding member 4 is interposed between the pocket portion of the outer holding member 6 and the pocket of the inner holding member 4 slidably arranged on the outer periphery of the rotary shaft 1. It is pressure-bonded to the sub gear 3 via the disc spring 5, and the sub gear 3 and the input gear 2 are For example, meshed with the engine side of the gear, which is assumed to rotational force of the engine is inputted into the input gear 2 and the subsidiary gear 3. By the way, the number of teeth of the sub gear 3 is larger than the number of teeth of the input gear 2. Therefore, the rotation of the sub gear 3 is set to be delayed from the rotation of the input gear 2, and as shown in FIG. , The inner holding member 4 pressed against the sub gear 3 causes a differential speed with respect to the rotation of the input gear 2, and the stopper 10 of the inner holding member 4 contacts the end of the pocket of the outer holding member 6 in the left side of the drawing. The inner holding member 4 is relatively rotated in the direction, and the sprags 8 are tilted accordingly. In this case, if the rotation shaft 1 rotates faster than the input gear 2 rotates, The sprag 8 stands up and the rotary shaft 1 idles. However, when the rotary shaft 1 rotates slowly and the input gear 2 rotates faster, the tilting of the sprag 8 causes the inner peripheral surface of the input gear 2 to move. Times The outer peripheral surface of the rolling shaft 1 is connected, and the rotation of the input gear 2 is transmitted to the rotating shaft 1. That is, this two-way differential clutch has a structure in which the rotational force of the input gear 2 is transmitted to the rotary shaft 1 only when the rotation of the input gear 2 is faster than the rotation of the rotary shaft 1 regardless of the forward and reverse rotation. ing. An output gear 9 is externally fitted to the outer periphery of such a rotary shaft 1 by spline fitting. For example, a gear on the wheel side is meshed with the output gear 9 to transmit a rotational force to the wheel side. Has become.

In such a conventional structure, since the output gear 9 is fixed to the rotary shaft 1, the inside of the two-way differential clutch may be damaged when an overload is input. There was a problem.

[0004]

[Means for Solving the Problems]

 The present invention was devised in view of the above-mentioned conventional problems, and an object thereof is to provide a structure capable of favorably preventing damage due to an overload input. A plurality of sprags are interposed between the inner peripheral surfaces of an input gear rotatably arranged on the outer periphery of the rotating shaft, and the sprags are inserted through the sprag only when the input gear rotates faster than the rotating shaft. In a two-way differential clutch that transmits the rotation of the input gear to the rotary shaft, an output gear having a tapered surface formed on the rotary shaft and having a tapered cone portion slidably contacting the tapered surface on the inner peripheral surface is provided on the rotary shaft. A disc spring, which is provided on the outer circumference and presses the output gear toward the tapered surface, is fixed to the rotary shaft.

[0005]

[Action]

 The taper cone part formed on the inner peripheral surface of the output gear is pressed against the taper surface formed on the rotating shaft via the disc spring, so that when the overload is transmitted from the rotating shaft, the output The gear can slide and rotate with respect to the rotary shaft against the pressing force of the disc spring, and the rotary shaft idles, causing an excessive amount of internal components of the two-way differential clutch and between the rotary shaft and the output gear. Rotational force is not transmitted and damage is well prevented.

[0006]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an enlarged cross-sectional configuration diagram of a mounting portion of an output gear for a rotary shaft in a two-way differential clutch similar to that shown in FIG. 2. A small diameter portion 1a having a small diameter is formed at a right end portion of the rotary shaft 1. A tapered surface 1b is formed in an inclined shape at the left end of the small diameter portion 1a. On the other hand, the output gear 9, which is fitted onto the small diameter portion 1a, is integrally formed with a tapered cone portion 9a protruding toward the tapered surface 1b and having an inner peripheral surface formed in a tapered shape.

A stop ring 11 is fitted on the outer circumference of the rotary shaft 1, and a disc spring 12 is fixedly installed inside the stop ring 11. The disc spring 12 is in contact with the output gear 9 and has a function of pressing the output gear 9 to the tapered surface 1b side. The disc spring 12 always causes the tapered cone portion 9a of the output gear 9 to rotate. It is in a state of being pressed against the tapered surface 1b.

Therefore, in the normal state, when the rotation of the input gear 2 is faster than the rotation of the rotary shaft 1 as described above, the rotational force of the input gear 2 is transmitted to the rotary shaft 1, and the rotation of the rotary shaft 1 is performed. Is transmitted to the wheel side through the output gear 9, but when an excessive torque is transmitted to the rotating shaft 1 through the input gear 2, the tapered surface is resisted against the pressing force of the disc spring 12. 1b and the tapered cone portion 9a are in sliding contact with each other, the rotation of the rotating shaft 1 is not transmitted to the output gear 9, and the rotating shaft 1 is idled when overloaded to prevent transmission of overload. Therefore, excessive torque or the like is not transmitted to the constituent members of the two-way differential clutch and the output gear 9, and damage to the two-way differential clutch is satisfactorily prevented.

[0009]

[Effect of the device]

 According to the present invention, a plurality of sprags are provided between the outer peripheral surface of a rotary shaft and the inner peripheral surface of an input gear rotatably arranged on the outer peripheral surface of the rotary shaft, and the input gear is more than the rotary shaft. In a two-way differential clutch that transmits the rotation of the input gear to the rotating shaft through the sprag only when rotating rapidly, a tapered surface is formed on the rotating shaft, and a taper cone portion that slidably contacts the tapered surface is formed on the inner circumference. The output gear provided on the surface is provided on the outer circumference of the rotary shaft, and the disc spring that presses the output gear toward the tapered surface is fixed to the rotary shaft. The output gear rotates together with the rotary shaft, and the rotational force from the input gear can be satisfactorily transmitted to the outside. Also, in the overload state, the tapered cone portion slides against the tapered surface to idle the rotating shaft to cut off the transmission of the overload and prevent the two-way differential clutch from being damaged. it can.

[Brief description of drawings]

FIG. 1 is an enlarged cross-sectional configuration diagram of a mounting structure of a rotary shaft and an output gear.

FIG. 2 is an overall vertical sectional view of a conventional two-way differential clutch.

FIG. 3 is a half sectional view taken along the line AA of FIG.

FIG. 4 is an operation explanatory view of a two-way differential clutch.

[Explanation of symbols]

 1 rotary shaft 1a small diameter part 1b taper surface 2 input gear 3 sub gear 4 inner holding member 6 outer holding member 8 sprag 9 output gear 9a taper cone part 11 stop ring 12 disc spring

Claims (1)

[Scope of utility model registration request] 1. A plurality of sprags are interposed between an outer peripheral surface of a rotating shaft and an inner peripheral surface of an input gear rotatably arranged on the outer periphery of the rotating shaft, the input gear being more than the rotating shaft. In a two-way differential clutch that transmits the rotation of the input gear to the rotary shaft through the sprag only when rotating rapidly, a taper surface is formed on the rotary shaft, and a taper cone portion slidably contacting the taper surface is formed on the inner peripheral surface. Is provided on the outer circumference of the rotary shaft, and a disc spring for pressing the output gear toward the taper surface is fixedly mounted on the rotary shaft. Construction.