Reactive force generation device of clutch-by-wire system and clutch lever device

1. A reactive force generation device of a clutch-by-wire system which generates a reactive force on a clutch lever, comprising:

a piston structure in which an air bleeding hole is provided; and

a contact member which is in contact with the clutch lever and in which the air bleeding hole is formed, wherein the air bleeding hole is formed in a region in which the clutch lever comes into contact.

2. The reactive force generation device according to claim 1 , wherein:

the contact member has a contact surface which comes into contact with the clutch lever and in which the air bleeding hole opens, and

the contact surface faces a rear of a vehicle.

3. The reactive force generation device according to claim 1 , comprising:

a holding member which holds the contact member and constitutes a piston structure together with the contact member;

a coil spring which is interposed between the contact member and the holding member and presses the contact member at a first end portion thereof; and

an adjuster which is provided on the holding member and causes a second end portion of the coil spring to come closer to and separate from the first end portion.

4. A clutch lever device which comprises the reactive force generation device of the clutch-by-wire system according to claim 1 , comprising:

a clutch lever which rotates around a rotation axis and to which a reactive force is applied by the reactive force generation device; and

a lever holder which rotatably supports the clutch lever and surrounds a contact portion in which the clutch lever and the contact member come into contact with each other,

wherein an opening portion into which the clutch lever is inserted is formed in the lever holder,

the clutch lever has a facing surface while faces an opening edge of the opening portion in a direction orthogonal to the rotation axis, and

the facing surface continuously faces the opening edge of the opening portion from a state in which the clutch lever is not being operated to a state in which the clutch lever is being operated, and extends in an arc shape centered on the rotation axis when seen in a direction in which the rotation axis extends.

5. The clutch lever device according to claim 4 , wherein the facing surface faces a front opening edge of the opening portion.

6. A clutch lever device which comprises the reactive force generation device of the clutch-by-wire system according to claim 1 , comprising:

a clutch lever which rotates around a rotation axis and to which a reactive force is applied by the reactive force generation device; and

a lever holder which rotatably supports the clutch lever and surrounds a contact portion in which the clutch lever and the contact member come into contact with each other,

wherein the lever holder includes a lower surface which defines from below a space in which a contact portion in which the clutch lever and the contact member come into contact with each other is disposed,

a communication portion which allows communication between an inside and an outside the lever holder is formed in the lower surface, and

the lower surface is inclined to descend toward the communication portion.

7. A reactive force generation device of a clutch-by-wire system which generates a reactive force on a clutch lever, comprising:

a piston structure in which an air bleeding hole is provided; and

a contact member which is in contact with the clutch lever and in which the air bleeding hole is formed, wherein:

the contact member has a contact surface which comes into contact with a roller of the clutch lever and in which the air bleeding hole opens, and

the roller rolls on the contract surface according to an operation of the clutch lever.

8. The reactive force generation device according to claim 7 , wherein the air bleeding hole is formed in a region in which the roller comes into contact.

9. A clutch lever device which comprises the reactive force generation device of the clutch-by-wire system according to claim 7 , comprising:

a clutch lever which rotates around a rotation axis and to which a reactive force is applied by the reactive force generation device; and

a lever holder which rotatably supports the clutch lever and surrounds a contact portion in which the clutch lever and the contact member come into contact with each other,

wherein the lever holder includes a lower surface which defines from below a space in which a contact portion in which the clutch lever and the contact member come into contact with each other is disposed,

a communication portion which allows communication between an inside and an outside lever holder is formed in the lower surface, and

the lower surface is inclined to descend toward the communication portion.

10. A reactive force generation device of a clutch-by-wire system which generates a reactive force on a clutch lever, comprising:

a piston structure in which an air bleeding hole is provided; and

a contact member which is in contact with the clutch lever and in which the air bleeding hole is formed,

wherein a labyrinth structure which obstructs a flow of a fluid through the air bleeding hole is formed on the contact member.

11. The reactive force generation device according to claim 10 , wherein the labyrinth structure has a flow passage which communicates with the air bleeding hole and extends spirally.

12. A clutch lever device which comprises the reactive force generation device of the clutch-by-wire system according to claim 10 , comprising:

a clutch lever which rotates around a rotation axis and to which a reactive force is applied by the reactive force generation device; and

a lever holder which rotatably supports the clutch lever and surrounds a contact portion in which the clutch lever and the contact member come into contact which each other,

wherein the lever holder includes a lower surface which defines from below a space in which contact portion in which the clutch lever and the contact member come into contact with each other is disposed,

a communication portion which allows communication between an inside and an outside the lever holder is formed in the lower surface, and

the lower surface is inclined to descend toward the communication portion.