A breaker bar includes a mounting seat that has two support arms extending from a base portion thereof. The base portion and the support arms define a mounting space. The base portion has a first engaging section disposed between the support arms. Each support arm has a piercing. A connector has a head body and a second engaging section. The head body is rotatably disposed between the support arms in the mounting space. The second engaging section is connected to the head body, and is in contact with and rotatable relative to the first engaging section. A fastening member extends through the piercings of the support arms and the through hole, and fastens the connector head to the mounting seat.
1 . A breaker bar comprising:
a rod unit including
a rod, and
a mounting seat that has a base portion connected to an end of said rod, and two spaced-apart support arms extending from said base portion, said base portion and said support arms cooperatively defining a mounting space, said base portion having a first engaging section that is disposed between said support arms and that faces said mounting space, each of said support arms having a piercing extending therethrough along an axial line;
a connector member rotatably connected to said mounting seat, and having a connector head that has
a head body disposed in said mounting space, rotatable about the axial line, and having two outer surfaces that are respectively disposed adjacent to said support arms, a through hole that extends through said outer surfaces in the axial line, and a surrounding surface connected between said outer surfaces, and
a second engaging section connected to said head body, and being in direct contact with and rotatable relative to said first engaging section; and
a fastening set including a fastening member that extends in the axial line through said piercings of said support arms and said through hole of said head body and that fastens said connector head to said mounting seat;
wherein said first engaging section of said mounting seat defines a recess;
wherein said second engaging section of said connector head is a protrusion that extends curvedly and outwardly from said surrounding surface into said recess; and
wherein said second engaging section is concentric with said surrounding surface.
2 . The breaker bar as claimed in claim 1 , wherein said base portion of said mounting seat includes an arc surface that extends curvedly and that bounds said recess defined by said first engaging section.
3 . The breaker bar as claimed in claim 1 , wherein said second engaging section of said connector head is curved and extends outwardly around said head body.
4 . The breaker bar as claimed in claim 1 , wherein:
said connector member further has a drive head that is disposed opposite to said connector head, and a shoulder that interconnects said connector head and said drive head;
said connector head has a maximum length in a longitudinal direction along which said rod extends; and
said shoulder has a maximum length in the longitudinal direction that is greater than a maximum length of said drive head in the longitudinal direction and that is smaller than said maximum length of said connector head.
5 . The breaker bar as claimed in claim 4 , wherein said shoulder has two lateral surfaces that are respectively coplanar with said outer surfaces of said head body.
6 . The breaker bar as claimed in claim 1 , wherein said fastening set further includes at least one resilient member that is disposed between said connector head and said mounting seat and that is sleeved on said fastening member.
7 . The breaker bar as claimed in claim 1 , wherein:
one of said support arms further has an internal thread formed in said piercing; and
said fastening member has a threaded portion threadedly connected to said internal thread.