Abstract: A torque wrench with constant torque comprises a wrench body having a tube and a cavity, an adapter, a pillar, a clutching member, a handle, and a resilient member. Therein, the adapter is rotatably disposed in the cavity, with plural adapting parts disposed on the outer periphery thereof. The pillar is disposed between the tube and the cavity for resisting against the adapting part. The clutching member is disposed in the tube, with a first end resisting against the peripheral surface of the pillar, a second end and a peripheral edge rollingly contacting the inner edge of the tube. The handle is connected to one end of the tube. The resilient member is disposed inside the tube for resisting against the second end of the clutching member. Thus, the torque is transmitted directly and prevented from diminishing, maintain a precise torque value.

Abstract: A torque wrench with constant torque comprises a wrench body having a tube and a cavity, an adapter, a pillar, a clutching member, a handle, and a resilient member. Therein, the adapter is rotatably disposed in the cavity, with plural adapting parts disposed on the outer periphery thereof. The pillar is disposed between the tube and the cavity for resisting against the adapting part. The clutching member is disposed in the tube, with a first end resisting against the peripheral surface of the pillar, a second end and a peripheral edge rollingly contacting the inner edge of the tube. The handle is connected to one end of the tube. The resilient member is disposed inside the tube for resisting against the second end of the clutching member. Thus, the torque is transmitted directly and prevented from diminishing, maintain a precise torque value.

Abstract: A torque wrench with functional lock includes a hollow main shaft, a tool member, an adjustable grip, a torque-adjustment elastic member, a clutch device, and a functional lock. The locking ring axially moves along the main shaft between a locked position and an unlocked position. When the locking ring is in the locked position, the rotation of the adjustable grip against the hollow main shaft is limited. When the locking ring is in the unlocked position, the rotation of the adjustable grip against the hollow main shaft is allowed, whereby the torque is adjusted. Therein, a percussion sound is produced when the locking ring is switched between the locked position and the unlocked position.

Abstract: A torque wrench with functional lock includes a hollow main shaft, a tool member, an adjustable grip, a torque-adjustment elastic member, a clutch device, and a functional lock. The locking ring axially moves along the main shaft between a locked position and an unlocked position. When the locking ring is in the locked position, the rotation of the adjustable grip against the hollow main shaft is limited. When the locking ring is in the unlocked position, the rotation of the adjustable grip against the hollow main shaft is allowed, whereby the torque is adjusted. Therein, a percussion sound is produced when the locking ring is switched between the locked position and the unlocked position.

Abstract: A torque wrench includes a hollow main shaft, a tool member, an adjustable grip, a torque-adjustment elastic member, a clutch device and a functional lock including a locking ring defining therein a bevel groove, a through hole located at the adjustable grip and a positioning ball received in the bevel groove and insertable through the through hole into contact with the periphery of the hollow main shaft. Thus, the user can control the positioning ball to lock the adjustable grip to the hollow main shaft simply by pushing the locking ring.