TWM576524U - Locking and releasing mechanism of locking pliers - Google Patents

Abstract

The present invention relates to a locking and releasing mechanism (2) of a locking pliers. One of the main key components of the locking pliers being in a locked state or a released state is whether the locking lever can move freely to maintain the mobility of the locking pliers movable handle; The automatic movement or braking of the lever is controlled by a locking and releasing mechanism that mainly releases the locking lever or the card to lock the locking lever with the positioning activities of a plurality of positioning steel balls; when the positioning steel ball is locked When the rod is in the locked state, the locking pliers are in a locked state; when the positioning steel ball leaves the locking rod, the locking pliers are released.

Description

Locking and locking mechanism of locking pliers (2)

This creation relates to the locking and release mechanism of the locking pliers.

A clamp-on hand tool with a locking mechanism is called a locking pliers. The locking pliers typically include a fixed handle and a fixed pawl at its end. The movable pawl and the movable handle are pivotable relative to the fixed handle to open and close the pawl. When the locking pliers are operated, the movable handle is closed relative to the fixed handle to close the pawl and hold the workpiece securely between them. The handle is then tightly pressed so that the locking mechanism on the handle locks the pawl to the workpiece and the locking pliers will remain securely locked in place to grasp the workpiece without requiring the user to apply a continuous force. To release the pawl that is locked in place, it must pass through a mechanism that is placed on the handle.

The purpose of this creation is to provide an improved locking pliers locking and release mechanism.

The technical characteristics and progressive effects of this creation:

A locking pliers locking and releasing mechanism (2), the locking pliers comprising a fixed handle and a fixed pawl at an end thereof, a manual handle and a movable pawl connected at an end thereof; a first middle pole The second end of the intermediate rod is connected to a biasing spring and a connecting rod disposed in the fixed handle; a locking and releasing mechanism is disposed on the fixed handle The end of the mechanism, comprising: a fixing sleeve having a claw end facing the fixing claw and a tail end facing the end of the fixing handle; the fixing sleeve is pierced a locking rod reciprocally movable along a center of the fixing sleeve; and the locking rod has a front end portion and a rear end portion, and a tapered ring portion having a gradually smaller diameter is formed from the front end portion toward the rear end portion, and the locking rod is connected thereto Rod connection.

A plurality of key grooves are disposed on the inner wall of the fixing sleeve and surround the locking rod; each of the key grooves has an inclined groove wall which is inclined from the claw end of the fixing sleeve toward the tail end.

A plurality of positioning steel balls are respectively disposed in each of the key grooves and are slidable along the inclined groove wall for chucking the locking rod.

A spring is disposed inside the claw end of the fixing sleeve, and pushes the opposite end of the positioning steel ball.

A sliding collar is disposed inside the claw end of the fixing sleeve and reciprocally movable along a center of the fixing sleeve to push the positioning steel ball opposite to the end.

And a release lever connected to the fixed handle at a pivot point, the release lever includes a pressing end and a pushing end, the pressing end protruding from the fixing handle, the pushing end extending into the fixing handle and Push the slip ring.

With the above configuration, the positioning steel ball slides toward the tail end of the fixing sleeve by the thrust of the spring, and can be clamped on the locking rod, so that the locking rod cannot move, the locking clamp is in a locked state; a pressing end of the release lever, the pushing end of the release lever passing the sliding ring to push the positioning steel ball toward the claw end of the fixing sleeve, so that the positioning steel ball can be separated from the locking rod, and the locking rod can be Move, the lock lever is unlocked.

10‧‧‧fixed handle

11‧‧‧Fixed claws

15‧‧‧ movable handle

16‧‧‧ movable claws

20‧‧‧Locking and release mechanism

21‧‧‧Fixed sleeve

211‧‧‧颚 claw end

End of 212‧‧

22‧‧‧Lock lever

221‧‧‧ front end

222‧‧‧ back end

223‧‧‧inclined ring

23‧‧‧ keyway

231‧‧‧Tilted groove wall

24‧‧‧ Positioning steel balls

25‧‧ ‧ spring

26‧‧‧ push block

27‧‧‧Sleeve ring

28‧‧‧ release lever

201‧‧‧ casing

281‧‧‧ pivot point

282‧‧‧pressure end

283‧‧‧Pushing end

31‧‧‧ Connecting rod

32‧‧‧Bias spring

33‧‧‧Intermediate pole

331‧‧‧first rod end

332‧‧‧Second rod end

333‧‧‧ pivot point

34‧‧‧Connecting parts

The first picture shows the side view of the creation locking pliers with the jaws in the open position.

The second picture shows the side view of the creation locking pliers with the jaws in the closed and locked position.

The third figure is an exploded perspective view of the creation locking and releasing mechanism.

The fourth picture is one of the combined profile and action diagrams of the creation locking and releasing mechanism.

The fifth picture is the second part of the combined section and action diagram of the creation locking and releasing mechanism.

The sixth picture is a cross-sectional view of VI-VI of the fourth figure.

For the convenience of the description of the central idea described in the column of the novel content, it is expressed by a specific embodiment. The proportions, dimensions, and amounts of movement and deformation of the elements in the embodiments are drawn in proportions and dimensions that are advantageous for illustration, rather than actual dimensions, and are not intended to limit the creation.

As shown in the first and second figures, the conventional type of locking pliers appearance and structure includes a fixed handle 10 and a fixed pawl 11 at its end, and the movable pawl 16 and the movable handle 15 are pivotable relative to the fixed handle 10 to open and The movable pawl 16 is closed; when the locking forceps are operated, the movable handle 15 is closed relative to the fixed handle 10 to close the two jaws and securely hold the workpiece therebetween.

The locking and release mechanism 20 is disposed at the end of the fixed handle 10, and the mechanism 20 includes a release lever 28 coupled to the fixed handle 10 at a pivot point 281. The mechanism 20 controls the locked state and the unlocked state of the locking pliers.

As with the second to sixth figures, the mechanism 20 includes a sleeve 201 having a consistent perforation 202.

a fixing sleeve 21 having a pair of facing claws 11 a claw end 211 and a tail end 212 facing the end of the fixed handle 10; a center of the fixing sleeve 21 is provided with a reciprocable locking rod 22, and the locking rod 22 is connected with the connecting rod 31, and the locking rod is locked. The rod 22 has a front end portion 221 and a rear end portion 222, and a tapered ring portion 223 having a gradually decreasing diameter is formed from the front end portion 221 toward the rear end portion 222. The inner wall of the fixing sleeve 21 is provided around the locking rod 22 The keyway 23 has a slanted groove wall 231 which is inclined from the shank end 211 of the fixing sleeve 21 toward the tail end 212; and a positioning steel ball 24 is slidably disposed in each of the key grooves 23, The positioning ball 24 slides in the inclined groove wall 231 of the key groove 23. A spring 25 and a push block 26 are disposed inside the claw end 211 of the fixing sleeve 21, and the push block 26 pushes the opposite end of the positioning steel ball 24; the tail end 212 of the fixing sleeve 21 is fixedly provided with a slip ring 27 So that the slip ring 27 can push the positioning of the steel ball 24 opposite the end.

The release lever 28 includes a pressing end 282 and a pushing end 283. The pressing end 282 protrudes from the fixing handle 10, and the pushing end 283 extends into the fixing handle 10 and pushes the sliding collar 27.

The locking rod 22 extends through a rod end extending from the claw end 211 of the fixing sleeve 21 to a connecting rod 31 disposed in the fixed handle 10. The connecting rod 31 is connected to an offset provided in the fixed handle 10. The spring 32, the end of the locking rod 22 facing the fixed jaw further contacts the first rod end 331 of the intermediate rod 33, and the second rod end 332 of the intermediate rod 33 is rotatably connected to the movable handle by a pivot point 333 15. The first rod end 331 of the intermediate rod 33 is also coupled to the link 31 and the biasing spring 32 via a coupling member 34.

As shown in the first to fifth figures, when the locking pliers are to be locked and clamped to the workpiece, the release lever 28 should be depressed first, and the pushing end 283 of the release lever 28 pushes the sliding collar 27, and the sliding collar 27 pushes the positioning steel ball 24, a plurality of positioning balls 24 move in the direction of the compression spring 25, and due to the guiding of the inclined groove wall 231, the positioning balls 24 no longer lie against the locking rod 22, so that the locking rod 22 has in the fixing sleeve 21. The freedom of movement, the movable handle 15 is movable relative to the fixed handle 10; then the movable handle 15 is closed relative to the fixed handle 10 to close the fixed pawl 11 and the movable pawl 16, and the movable lever 15 moves the intermediate lever 33 when it moves, The first end of the intermediate rod 33 moves in a direction to compress the biasing spring 32, and the link 31 simultaneously pulls the lock lever 22 to move. After the locking clamp clamps the workpiece, the release lever 28 is released, and the elastic force of the spring 25 acts on the positioning steel ball 24. The positioning steel ball 24 can be locked on the locking rod 22 and fixed by the guiding of the inclined groove wall 231. On the inclined groove wall 231 of the sleeve 21, more importantly, when such a locking clamp is actuated after clamping the workpiece, it is also subjected to the reaction force of clamping the workpiece, and the effect is greater than the original positioning steel ball. The latching force of the latching lever 22 and the tilting groove wall 231 of the fixing sleeve 21 is increased by the rear end portion 222 toward the front end portion 221 because the diameter of the inclined ring portion 223 provided by the locking lever 22 is increased. Therefore, the clamping force is greater, so that the stability of the optimal clamping operation can be achieved, thereby braking the locking lever 22, keeping the locking clamp in the locked state of the clamping workpiece, and the user does not need to apply continuous The force is applied to the movable handle 15.

Conversely, to release the locking pliers from the locked state, the pressing end 282 of the release lever 28 is pressed, and the pushing end 283 pushes the sliding collar 27, and the sliding collar 27 pushes the positioning steel ball 24, several The positioning ball 24 moves in the direction of the compression spring 25, and the positioning ball 24 enters between the inclined groove wall 231 of the sleeve sleeve 21 and the inclined ring portion 223 of the lock lever 22 due to the guidance of the inclined groove wall 231. The distance can accommodate the positioning of the steel ball 24 and make it freely movable, so that the locking lever 22 has the freedom of movement in the fixing sleeve 21; at this time, the biasing spring 32 releases energy and pushes the connecting member 34. The link 31 and the lock lever 22 move the intermediate lever 33 to push the movable handle 15 away from the fixed handle 10. The fixed pawl 11 and the movable pawl 16 open to release the workpiece, and the lock clamp is unlocked.

Release the release lever 28 when the locking pliers are in the unlocked state, as described above, the positioning steel The bead 24 is again caught between the lock lever 22 and the keyway 23 of the fixed sleeve 21, thereby holding the locking pliers in the unlocked state, which has the advantage that the open movable handle 15 does not shake.

Claims (2)

A locking pliers locking and releasing mechanism (2), the locking pliers comprising a fixed handle and a fixed pawl at an end thereof, a manual handle and a movable pawl connected at an end thereof; a first middle pole The end of the intermediate rod is connected to the movable handle, and the second end of the intermediate rod is connected with a biasing spring and a connecting rod disposed in the fixed handle; a locking and releasing mechanism is disposed at the end of the fixed handle, and features Wherein: the mechanism comprises: a sleeve having a consistent perforation; a fixing sleeve having a jaw end facing the fixed jaw and a tail end facing the end of the fixed handle; The fixing sleeve is provided with a locking rod reciprocally movable along the center of the fixing sleeve, and the locking rod is connected with the connecting rod. The other locking rod has a front end portion and a rear end portion, and is formed from the front end portion to the rear end portion. a tapered ring portion having a gradually smaller diameter; a plurality of key grooves disposed on an inner wall of the fixing sleeve and surrounding the locking rod; each of the key grooves has an inclined groove wall, the inclined groove wall being the cymbal from the fixing sleeve The claw end is inclined to the end of the tail; several positioning Beads are respectively disposed in each of the key grooves and slidable along the inclined groove wall; a spring is disposed inside the claw end of the fixing sleeve to push the positioning steel ball opposite to the end; a sliding collar, The inside of the claw end of the fixing sleeve is reciprocally movable along the center of the fixing sleeve to push the opposite end of the positioning steel ball; and a release lever is connected to the fixed handle at a pivot point, The release lever includes a pressing end and a pushing end, the pressing end protruding from the fixing handle, the pushing end extending into the fixing handle and pushing the sliding collar. The lock and release mechanism (2) of the locking pliers of claim 1, wherein the spring and each of the positioning balls comprise a push block.