Steering device
A steering device includes a rack shaft that turns wheels, a bush slidably support the rack shaft, tie-rods joined to the rack shaft, boots that cover a joining portion that joins the rack shaft and the tie-rod. A protrusion part is formed on either one of the bush and a rack housing so as to protrude toward the other. A restriction groove into which the protrusion part is inserted is formed on the other. A space inside the first boot and a space inside the second boot constantly communicate with each other via the restriction groove.
1. A steering device, comprising:
a turning shaft configured to turn wheels by transmitting a steering force;
a housing configured to accommodate the turning shaft;
a bush provided in the housing to slidably support the turning shaft;
first and second tie-rods swingably joined to the turning shaft;
a first boot provided on the housing to cover a first joining part that joins the turning shaft and the first tie-rod; and
a second boot provided on the housing to cover a second joining part that joins the turning shaft and the second tie-rod, wherein
either one of the bush and the housing has a protrusion part formed so as to protrude toward the other, and the other has a restriction groove into which the protrusion part is inserted,
a space inside the first boot and a space inside the second boot constantly communicate with each other via the restriction groove, and
the restriction groove extends in an axial direction of the turning shaft such that the bush is restricted from rotating about an axial center of the turning shaft by the protrusion part inserted into the restriction groove.
2. A steering device, comprising:
a turning shaft configured to turn wheels by transmitting a steering force;
a housing configured to accommodate the turning shaft;
a bush provided in the housing to slidably support the turning shaft;
first and second tie-rods swingably joined to the turning shaft;
a first boot provided on the housing to cover a first joining part that joins the turning shaft and the first tie-rod; and
a second boot provided on the housing to cover a second joining part that joins the turning shaft and the second tie-rod, wherein
either one of the bush and the housing has a protrusion part formed so as to protrude toward the other, and the other has a restriction groove into which the protrusion part is inserted so as to be formed along an axial direction of the turning shaft,
a space inside the first boot and a space inside the second boot constantly communicate with each other via the restriction groove,
the protrusion part is formed on the bush, and the restriction groove is formed in the housing,
the housing has an opening end surface where the restriction groove is opened in the axial direction of the turning shaft, and
a length of the restriction groove in the axial direction is longer than a length between an insertion tip surface of the bush inserted in the housing and the opening end surface.
3. A steering device, comprising:
a turning shaft configured to turn wheels by transmitting a steering force;
a housing configured to accommodate the turning shaft;
a bush provided in the housing to slidably support the turning shaft;
first and second tie-rods swingably joined to the turning shaft;
a first boot provided on the housing to cover a first joining part that joins the turning shaft and the first tie-rod; and
a second boot provided on the housing to cover a second joining part that joins the turning shaft and the second tie-rod, wherein
either one of the bush and the housing has a protrusion part formed so as to protrude toward the other, and the other has a restriction groove into which the protrusion part is inserted so as to be formed along an axial direction of the turning shaft,
a space inside the first boot and a space inside the second boot constantly communicate with each other via the restriction groove,
the protrusion part is formed in the housing, and the restriction groove is formed on the bush,
the housing has an opening end surface where an assembling hole to which the bush is assembled is opened in the axial direction of the turning shaft, and
a length of the assembling hole in the axial direction is longer than a length between an insertion tip surface of the bush inserted in the housing and the opening end surface.
4. The steering device according to claim 3 , wherein
the bush has a tubular main body part and a retainer part formed so as to protrude radially outward from the main body part, the retainer part being engaged with the housing, and
the restriction groove is formed on the main body part and the retainer part.
5. The steering device according to claim 1 , wherein
a cross-sectional area of a passage formed by the restriction groove such that the space inside the first boot and the space inside the second boot communicate with each other is set based on a resistance imparted to air moving between the space inside the first boot and the space inside the second boot according to a reciprocating movement of the turning shaft.
6. The steering device according to claim 2 , wherein
the bush has a tubular main body part and a retainer part formed so as to protrude radially outward from the main body part, the retainer part being engaged with the housing, and
the protrusion part is formed so as to protrude radially outward from the retainer part.