Torque setting device for torque wrench
OwnerYi-Fu Cheninventor
Life of this patent
Estimating the term…
Abstract
A torque wrench includes a main tube having a driving head and a receiving hole on two ends thereof. A ratchet tube is inserted into receiving hole and has multiple elongate positioning recesses. A passage is defined axially through the ratchet tube. An operation tube is mounted to the ratchet tube and has a driving section and a holding section, and a connection hole is defined through the driving section and the holding section. The driving section has an engaging hole in which a bead is received. A torque unit is received in the receiving hole, the passage and the connection hole. The torque is set by rotating operation tube. A control tube is mounted to the driving section and has a bolt movable in an L-shaped slot to release and restrict movement of the control tube relative to the operation tube.
Claims7
A torque wrench comprising:
- a main tube (1) having a driving head (2) connected to a first end thereof, a receiving hole (11) defined in a second end of the main tube (1);
- a ratchet tube (3) inserted into receiving hole (11) in the second end of the main tube (1) and having multiple elongate positioning recesses (31) defined axially in an outside thereof, a passage (32) defined axially through the ratchet tube (3) and communicating with the receiving hole (11);
- an operation tube (4) mounted to the ratchet tube (3) and having a driving section (41) and a holding section (42), a connection hole (43) defined through the driving section (41) and the holding section (42), a shoulder (44) formed at a connection portion between the driving section (41) and the holding section (42), the driving section (41) having at least one engaging hole (411) which communicates with the connection hole (43), a bead (5) received in the at least one engaging hole (411);
- a torque unit (6) received in the receiving hole (11) of the main tube (11), the passage (32) of the ratchet tube (3) and the connection hole (43) of the operation tube (4), the torque unit (6) being compressed and moved by rotating the operation tube (4), and
- a control tube (7) mounted to the driving section (41) of the operation tube (4) and having a protrusion (71) extending from an inner periphery thereof, the protrusion (71) having an inclined face (711), a spring (8) mounted to the driving section (41) and biased between the protrusion (71) and the shoulder (44) of the operation tube (4), the control tube (7) axially moved relative to the operation tube (4), and the inclined face (711) of the protrusion (71) pushing the bead (5) into the engaging hole (411) and engaged with one of the positioning recesses (31), the control tube (7) having an L-shaped slot (72) defined in an outside thereof, a bolt (9) extending into the L-shaped hole (72) and connected to the driving section (41), the bolt (9) movable along the L-shaped slot (72) to restrict or release a movement of the control tube (7) relative to the operation tube (4).
Dependencies are inferred from the claim text.