JP2992846B2 - Two-way differential clutch - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a two-way differential clutch.

[0002]

2. Description of the Related Art Conventionally, in a two-way differential clutch, when the rotation of an input member is slower than the rotation of an output member, a sprag is in an upright state, the output member idles, and conversely, the rotation of the input member is smaller. When the sprags are tilted fast, the input side member and the output side member are engaged via the sprags and become active,
The rotation of the input-side member is configured to be transmitted to the output-side member, and the above operation is performed in both forward and reverse rotations.

[0003]

However, when a conventional two-way differential clutch is used for a power transmission system of a vehicle, when the vehicle is to be manually pushed when the vehicle is stopped, the engine side and the wheel side become two-sided. There has been a problem that the connection state is established via the directional differential clutch, and manual pushing is impossible.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and does not provide a two-way differential clutch which can be manually pushed when used in a vehicle. The gist of the invention is that an input-side member having a first cylindrical surface and an output-side member having a second cylindrical surface rotatably disposed with a gap with respect to the first cylindrical surface. And a plurality of sprags interposed in the gap,
A movable holding member disposed in the gap and slidably moving in a circumferential direction with a delay with respect to rotation of the input side member when the input side member rotates to tilt the sprag, and a first and second movable holding member. A fixed holding member fixed to the first cylindrical surface, the spring having a spring that lifts the sprag from the second cylindrical surface and urges the sprag toward the first cylindrical surface in an upright state of the sprag with respect to the cylindrical surface; A member, slidably disposed in a gap between the second cylindrical surface and the movable holding member so as to be slidable in a circumferential direction by an inertial force, and when the input-side member starts rotating, the sprag is provided by an inertial force. Tilting the sprags to engage the first and second cylindrical surfaces, and an inertia holding member capable of causing the sprags to be in an upright state by inertia when the rotation of the input side member is stopped. Is to have

[0005]

When the input side member starts rotating, the plurality of sprags interposed between the input side member and the output side member are first tilted by the movable holding member, and further tilted by the inertial force of the inertial holding member. The sprag is engaged between the input side member and the output side member, and the rotational force of the input side member is transmitted to the output side member. When the rotation of the input-side member falls below the rotation of the output-side member from the engaged state, the engagement is released, and the idle state occurs. When the rotation of the input side member is stopped from the idling state, the inertia holding member releases the engagement relationship between the input side member and the output side member by bringing the sprag into an upright state by inertia force, and simultaneously holds the sprag. A spring provided on the member raises the sprag from the output side member and draws it toward the input side member, thereby completely disengaging the input side member and the output side member. The member can be freely rotated, and the car can be manually pushed.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an enlarged view of a main part in a longitudinal section of a two-way differential clutch, and FIG. 5 is a transverse sectional view of the two-way differential clutch. The two-way differential clutch is provided in a power transmission system of a vehicle, and has a structure in which rotation of the engine is input to an input gear 1 which is an input side member via a gear. The output shaft 2 is rotatably supported via the bearings 15, 15, and is rotatably inserted via a bearing 14. The input gear 1 is formed with teeth 1 a on the outer periphery thereof for receiving rotation from the engine side. 1
Reference numeral 0 denotes an output gear provided in parallel with the input gear 1, and is connected to one step on the outer peripheral surface of the output shaft 2 by a spline. The teeth of the output gear 10 mesh with the gears on the wheel side of the vehicle. As shown in FIG. 5, reference numeral 11 denotes a sub-gear, and teeth provided on an outer periphery of the sub-gear mesh with a gear on the same engine side as the input gear 1. A movable holding member 5 is rotatably inserted on the inner peripheral side of the sub gear 11 around the output shaft 2 via a bearing 13,
The movable holding member 5 and the sub gear 11 are pressed against each other by a disc spring 12.

An inner peripheral surface of the input gear 1 is an inner peripheral cylindrical surface 1b, and a ring-shaped fixed holding member 4 is fixed to the inside of the inner peripheral cylindrical surface 1b via a knock pin 3. Pockets 4a are formed in the holding member 4 at predetermined intervals in the circumferential direction, and cut-out notches 4b are formed in appropriate places. In each pocket 4a, holding springs 8, 8 composed of leaf springs or the like are mounted.

The ring-shaped movable holding member 5 is disposed inside the fixed holding member 4 with a slight gap, and the movable holding member 5 is also provided with pockets 5a at predetermined intervals in the circumferential direction. Are formed. A stopper pin 9 is fixed to an appropriate position of the movable holding member 5, and the tip of the stopper pin 9 is formed by a notch recess 4 b of the fixed holding member 4.
Is inserted inside.

A ring-shaped inertial holding member 6 is disposed inside the movable holding member 5 so as to be slidable in the circumferential direction. Pockets 6a are formed at intervals. The output shaft 2 as an output-side member is disposed on the inner peripheral side of the inertial holding member 6, and the outer peripheral surface of the output shaft 2 is an outer cylindrical surface 2a. A plurality of sprags 7 are interposed at predetermined intervals along the circumferential direction between the outer cylindrical surface 2a and the inner cylindrical surface 1b of the input gear 1. Each sprag 7 And provided in each pocket 4a, 5a, 6a of the movable holding member 5 and the inertial holding member 6,
A concave portion 7c is formed in the center of the sprag 7, and the holding springs 8, 8 are brought into contact with the concave portion 7c, and the sprags 7 are urged by the holding springs 8, 8 toward the inner peripheral cylindrical surface 1b. In the neutral state shown in FIG. 1, the outer arc surface 7a of the sprag 7 is in contact with the inner cylindrical surface 1b, and the inner arc surface 7b of the sprag 7 is in contact with the outer cylindrical surface 2a of the output shaft 2. The sprag 7 is held upright between the input gear 1 and the output shaft 2 by forming a gap S therebetween.

As described above, the movable holding member 5 is pressed against the sub gear 11, and the sub gear 11 is meshed with the rotating gear on the engine side together with the tooth portion 1 a of the input gear 1. The number of teeth of the sub gear 11 is slightly larger than the number of teeth of 1 a, and the rotation of the movable holding member 5 is set to be delayed through the sub gear 11 more than the rotation of the input gear 1.

In such a structure, when the input gear 1 starts rotating counterclockwise as shown in FIG. 2 by receiving the rotational force from the engine side, the movable holding member 5 simultaneously rotated by the sub gear 11 In order to rotate the input gear 1 more slowly than the input gear 1, the input gear 1 and the fixed holding member 4 rotate counterclockwise until the stopper pin 9 comes into contact with the right side surface of the cutout recess 4b in the drawing. The end of the pocket 5a of 5 presses the sprag 7 in the clockwise direction, causing the sprag 7 to tilt.
After the rotation is started, the movable holding member 5 idles with respect to the sub gear 11 after the stopper pin 9 comes into contact with the wall surface of the cutout recess 4b, and the sub gear 11 is not damaged.

Even if the rotation of the input gear 1 is started, the inertia holding member 6 is in a stationary state due to the inertial force. As the input gear 1 rotates, as shown in FIG. 7 is pressed in a clockwise direction, the tilt of the sprag 7 further advances, and the outer arc surface 7a of the sprag 7 engages with the inner peripheral cylindrical surface 1b of the input gear 1 to thereby The inner arc surface 7b is engaged with the outer peripheral cylindrical surface 2a of the output shaft 2, and in this state, the input gear 1 and the output shaft 2 are in a clutch operating state, and the rotation of the input gear 1 is transmitted to the output shaft 2. Can be Therefore, the rotational force of the engine is favorably transmitted to the wheel side of the vehicle.

Next, when the engine is stopped from the clutch operating state and the rotation of the input gear 1 falls below the rotation of the output shaft 2, the engagement of the sprags 7 is released, and the sprags 7 are idled.
When the rotation of the input gear 1 stops from the idling state, the movable holding member 5 also stops rotating. However, as shown in FIG.
The inertial holding member 6 retains the rotational inertia force even when the rotation is stopped, and the inertial holding member 6 presses the inner arc surface 7b side of the sprag 7 counterclockwise by the rotational inertia force,
The sprag 7 is moved upright. In the upright state, the sprags 7 are pulled up toward the inner cylindrical surface 1b by the urging force of the springs 8 and come into contact with the input gear 1, so that the sprags 7 are separated from the output shaft 2 and output in this state. The shaft 2 becomes freely rotatable. Therefore, when the engine is stopped, the output shaft 2 can rotate freely,
The vehicle can be moved in a hand-pushed state by rotating the wheel side.

When the rotation of the input gear 1 starts in the reverse direction even when the rotation of the input gear 1 is in the reverse direction, the sprags 7 are tilted when the rotation of the input gear 1 starts, and the rotational force is transmitted to the output shaft 2, and When the rotation of the gear 1 stops, the output shaft 2 is freely rotatable.

[0015]

According to the present invention, there is provided a two-way differential clutch having an input member having a first cylindrical surface and a second member disposed rotatably relative to the first cylindrical surface with a gap therebetween. An output-side member having a cylindrical surface, a plurality of sprags interposed in the gap, and a circumferential direction delayed from the rotation of the input-side member when the input-side member is rotated and disposed in the gap. A movable holding member for slidingly moving the sprag and tilting the sprag;
And a spring that raises the sprag from the second cylindrical surface and urges the sprag toward the first cylindrical surface when the sprag is in an upright state with respect to the second cylindrical surface, and is fixed to the first cylindrical surface. A fixed holding member to be slidably disposed in a gap between the second cylindrical surface and the movable holding member in a circumferential direction by an inertial force, when the input side member starts rotating, While tilting the sprags by force to engage the sprags with the first and second cylindrical surfaces,
An inertial holding member capable of causing the sprag to be in an upright state by inertial force when the rotation of the input side member is stopped, so that when the input side member starts rotating, the inertial force of the inertial holding member The sprags are tilted by the relative movement of the input side member and the output side member are engaged via the sprags to transmit power, and when the rotation of the input side member is stopped, the rotational inertia force of the inertial holding member causes the sprag to rotate. The sprag is returned to the upright state, and the sprag is separated from the output side member by the biasing force of the spring, and the output side member becomes freely rotatable.When the vehicle is stopped, the wheel side is freely rotated, and the vehicle is manually pushed. Can be moved.

[Brief description of the drawings]

FIG. 1 is an enlarged sectional view of a main part in a neutral state of a two-way differential clutch.

FIG. 2 is a cross-sectional configuration diagram of a main part in a state where an input gear of a two-way differential clutch has started to rotate.

FIG. 3 is a cross-sectional configuration diagram of a main part in an engaged state in which rotation is further advanced.

FIG. 4 is a cross-sectional configuration diagram of a main part in a state where rotation of an input gear is stopped.

FIG. 5 is a longitudinal sectional configuration diagram of a two-way differential clutch.

[Explanation of symbols]

 Reference Signs List 1 input gear (input side member) 1b inner peripheral cylindrical surface (first cylindrical surface) 2 output shaft (output side member) 2a outer peripheral cylindrical surface (second cylindrical surface) 4 fixed holding member 4a pocket 5 movable holding member 5a Pocket 6 Inertial holding member 6a Pocket 7 Sprag 7a Outer arc surface 7b Inner arc surface 8 Holding spring S Clearance

Continuation of the front page (56) References JP-A-3-14923 (JP, A) JP-A-2-21035 (JP, A) JP-A-3-199722 (JP, A) JP-A-3-113131 (JP) , A) JP-A-3-84222 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) F16D 41/00-41/36

Claims (1)

(57) [Claims] An input-side member having a first cylindrical surface; an output-side member having a second cylindrical surface disposed to be rotatable relative to the first cylindrical surface with a gap therebetween; A plurality of sprags interposed in the gap, and when the input-side member is disposed in the gap and rotates, the sprag is slid in the circumferential direction behind the rotation of the input-side member to tilt the sprag; A movable holding member, and a spring that lifts the sprag from the second cylindrical surface and urges the sprag toward the first cylindrical surface in an upright state of the sprag with respect to the first and second cylindrical surfaces. A fixed holding member fixed to a first cylindrical surface, and a slidably movable in a circumferential direction by an inertial force in a gap between the second cylindrical surface and the movable holding member; When the member starts rotating, the sprags are tilted by inertia to And an inertia holding member capable of engaging the first and second cylindrical surfaces with the first and second cylindrical surfaces and enabling the sprags to be in an upright state by inertial force when rotation of the input side member is stopped. A two-way differential clutch, characterized in that: