DAMPER DEVICE AND STEERING DEVICE

摘要

In the damper device, when the large diameter portion does not apply an impact force on the flange portion, the elastic body is disposed in one of the housing and the cylindrical portion with a gap and when the large diameter portion applies the impact force on the flange portion, the elastic body is compressed by the restricting surface and the flange portion in an axial direction to be deformed into a state that the elastic body is brought into contact with all of the housing, the restricting surface, the cylindrical portion and the flange portion to be filled in the gap. The impact receiving member is restricted from a movement relative to the housing by the deformed elastic body when the end portion of the cylindrical portion is advanced into the relief portion and the impact receiving member keeps a non-contact state with the housing.

主权项

1. A damper device comprising;
a shaft having a shaft portion and a large diameter portion; a housing formed in a cylindrical shape and through which the shaft is inserted, the shaft being movable in an axial direction relative to the housing, the housing being provided with a restricting surface facing toward an end surface side of the large diameter portion; and an impact absorbing member inserted on the shaft portion and disposed between the end surface of the large diameter portion and the restricting surface in an axial direction, wherein the impact absorbing member includes; an impact receiving member including a cylindrical portion facing to an inner peripheral surface of the housing and a flange portion extending from the cylindrical portion outwardly in a radial direction and facing to the restricting surface and being contactable with the large diameter portion; and an elastic body provided in a space formed by the inner peripheral surface of the housing, the restricting surface, an outer peripheral surface of the cylindrical portion and the flange portion and formed by a rubber material or a synthetic resin material having a rubber-like elasticity, and wherein, the housing includes a relief portion defined by an area provided continuously inwardly in a radial direction from the restricting surface, wherein an end portion of the cylindrical portion can be more advanced towards an opposite side to the large diameter portion than the restricting surface along in an axial direction; when the large diameter portion does not apply an impact force on the flange portion, the elastic body is disposed having a gap relative to at least one of the inner peripheral surface of the housing and the outer peripheral surface of the cylindrical portion; when the large diameter portion applies the impact force on the flange portion, the elastic body is compressed by the restricting surface and the flange portion in an axial direction to be deformed into a state that the elastic body is brought into contact with all of the inner peripheral surface of the housing, the restricting surface, the outer peripheral surface of the cylindrical portion and the flange portion to be filled in the gap, and the impact receiving member is restricted from the relative movement relative to the housing by the deformed elastic body when the end portion of the cylindrical portion is advanced into the relief portion and the impact receiving member keeps a non-contact state with the housing.