CN206780247U - A kind of three-jaw movable ratchet carring hand - Google Patents

Abstract

The utility model proposes a three-jaw movable ratchet wrench, which solves the problems of poor applicability of the bayonet fixed plate wrench and easy damage to nuts by the movable mouth wrench. The utility model comprises claws, a lower wrench frame, a ratchet claw disc, an end face threaded sleeve, an upper wrench frame, a compression sleeve, a distribution head, a pin one, a ratchet, a steel ball, a spring and a pin two. The utility model has the advantages: the three-jaw movable ratchet wrench is designed according to the clamping principle of the three-jaw chuck, and the three jaws are arranged at an angle of 120°. The movable ratchet wrench completes the clamping through the contact between the three claws and the three evenly distributed surfaces of the hexagonal nut, which has the advantage of large clamping force and is not easy to damage the nut. The wrench of the utility model is suitable for nuts or screws with round, regular triangle and regular hexagonal ends, and has good adaptability.

Description

A three-jaw movable ratchet wrench

technical field

The utility model relates to a common tool in the fields of assembly, maintenance and household use, in particular to a three-jaw movable ratchet wrench.

Background technique

With the development of society, there are more and more demands for machines in mechanical equipment, automobile manufacturing, textile industry and agriculture. Along with the use of the machine, repair and maintenance become part of the daily work.

In the assembly of machines and automobiles, it is necessary to use wrenches of various specifications to tighten the nuts to achieve the purpose of connection. When repairing and maintaining machines in daily life, it is often encountered that some nuts and screws are rusted or connected. Too tight, resulting in the nuts, screws cannot be loosened or the hexagonal edges of the nuts, screws are flattened by the wrench.

Most of the current ratchet wrenches are bayonet fixed, that is, a set of wrenches is equipped with sockets of various specifications, and there are also movable mouth wrenches. The bayonet type fixed wrench is inconvenient to carry and has poor adaptability. It is only convenient when using a nut of a certain size. Swivel wrench can be used for tightening and loosening nuts of different sizes, but since the traditional swivel wrench has only two jaws, there are only two contact surfaces with the nut, sometimes the nut is not tightly clamped by the movable jaw. phenomenon, the wrench is prone to slipping during the twisting process, causing damage to the nut.

Utility model content

The utility model proposes a three-jaw movable ratchet wrench, which solves the problems of poor applicability of the bayonet type fixed plate wrench and easy damage to nuts of the movable mouth wrench.

The technical scheme of the utility model is realized in the following way: a three-jaw movable ratchet wrench, including a lower wrench frame, the ratchet pawl disc is installed in the end inner hole of the lower wrench frame, and the end surface threaded sleeve is installed in the ratchet pawl disc, The bottom of the ratchet claw disc is provided with three positioning slots for installing the claws. The claws can move in the positioning slots. The sleeve and the ratchet claw disc are connected by threads, and there is a gap between the outer diameter of the end face threaded sleeve and the inner diameter of the compression sleeve, and the end face threaded sleeve can rotate freely in the ratchet claw disc, and the upper wrench holder and the lower wrench holder are fixed by pin two Riveted together, the pawl, steel ball and spring are installed in the slot between the lower wrench frame and the upper wrench frame, the pawl is engaged with the ratchet claw plate, the pin one is fixedly connected with the pawl, the distribution head and the pin Column one is fixedly connected, and the spring pushes against the steel ball, and the steel ball pushes against the groove at the bottom of the ratchet.

The pawl is provided with two left and right teeth meshing with the pawl plate of the ratchet, and the bottom of the pawl is provided with two grooves for matching with steel balls.

The upper part of the end face threaded sleeve is provided with a net pattern outer circle, a straight grain outer circle or a regular hexagonal end.

The utility model has the advantages: the three-jaw movable ratchet wrench is designed according to the clamping principle of the three-jaw chuck, and the three jaws are arranged at an angle of 120°. The movable ratchet wrench completes the clamping through the contact between the three claws and the three evenly distributed surfaces of the hexagonal nut, which has the advantages of large clamping force and not easy to damage the nut.

At the same time, the three-jaw movable ratchet wrench can be adapted to the tightening and loosening of nuts of different sizes. When the hexagon socket hole or the cross groove of the screw slips off, it cannot be disassembled with a hexagon wrench or a Phillips screwdriver. The three claws of the ratchet wrench can clamp the cylinder head of the hexagon socket head screw and the cross recessed cylinder head screw to realize Tightening and loosening of cylinder head screws. Therefore, the wrench of the present invention is suitable for nuts or screws with round, regular triangle and regular hexagonal ends, and has good adaptability.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are only some embodiments of the utility model, and those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is the assembly rendering of the utility model three-jaw movable ratchet wrench.

Fig. 2 is an exploded view of the three-jaw movable ratchet wrench of the present invention.

Fig. 3 is a schematic diagram of a three-jaw movable ratchet wrench of the present invention to turn the nut clockwise.

Fig. 4 is a schematic diagram of a three-jaw movable ratchet wrench of the present invention to turn the nut counterclockwise.

Fig. 5 is a working schematic diagram of the three-jaw movable ratchet wrench of the present invention.

In the figure: claw-1, lower wrench frame-2, ratchet claw plate-3, end thread sleeve-4, upper wrench frame-5, compression sleeve-6, distribution head-7, pin one-8 , pawl-9, steel ball-10, spring-11, pin two-12.

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

As shown in Figures 1 to 5, a three-jaw movable ratchet wrench includes a lower wrench frame 2, a ratchet claw plate 3 is installed in the end inner hole of the lower wrench frame 2, and an end face threaded sleeve 4 is installed on the ratchet claw plate 3 Among them, the bottom of the ratchet claw plate 3 is provided with three positioning slots for installing the claw 1, the claw 1 can move along the direction of the slot in the positioning slot, the lower end surface of the end threaded sleeve 4 and the upper surface of the claw 1 The end face is provided with the end face threads that cooperate with each other, the compression sleeve 6 and the ratchet claw disc 3 are connected through threads, the outer diameter of the end face threaded sleeve 4 and the inner diameter of the compression sleeve 6 have a gap, and the end face thread sleeve 4 is on the ratchet jaw disc 3 The upper wrench frame 5 and the lower wrench frame 2 are fixed and riveted together by the pin 2 12, and the pawl 9, the steel ball 10 and the spring 11 are installed together in the slot between the lower wrench frame 2 and the upper wrench frame 5 , the pawl 9 meshes with the ratchet pawl plate 3, the pin 8 is fixedly connected with the pawl 9, the distribution head 7 is fixedly connected with the pin 8, the spring 11 pushes against the steel ball 10, and the steel ball 10 pushes against the pawl 9 in the groove at the bottom.

The ratchet 9 is provided with two left and right teeth meshing with the ratchet claw disc 3 , and two left and right grooves for matching with the steel ball 10 are provided at the bottom of the ratchet 9 .

The upper part of the end face threaded sleeve 4 is provided with a net pattern outer circle, a straight grain outer circle or a regular hexagonal end.

Working principle: The lower end surface of the end threaded sleeve 4 is processed with end thread, and the upper end surface of the three claws 1 is processed with the same thread as the end thread of the end threaded sleeve 4 to cooperate with it. When the end thread is twisted by hand or a wrench When the straight-grain outer circle or regular hexagonal end of the sleeve 4 is used, the flat thread on the lower end surface of the threaded sleeve 4 will make the three claws 1 move radially at the same time, approach or withdraw from the center, and drive the three claws 1 Self-centering to achieve clamping of nuts or screws.

Combining Figure 3, Figure 4 and Figure 5, under the action of spring 11, steel ball 10 enters the bottom groove of ratchet 9, and by turning the switch head 7, steel ball 10 alternately pushes against the left and right grooves of the ratchet Inside, the positioning of the ratchet 9 is limited, and the left and right teeth of the ratchet 9 can be alternately meshed with the ratchet claw disc 3, respectively, and the ratchet claw disc 3 follows the lower wrench frame 2 to move clockwise or counterclockwise. , so as to realize the tightening and loosening of nuts or screws, because the ratchet pawl plate 3, the two teeth of the pawl 9, and the rotation center of the pawl 9 are not on a straight line, therefore, the rotation of the lower wrench frame 2 drives the pawl 9 When rotating, the ratchet pawl 9 will not rotate around the ratchet claw disc 3, but clamps the ratchet claw disc 3 to rotate, so as to achieve the purpose of twisting the nut or screw.

Generally, the loosening and unloading of the threaded connection is carried out by unscrewing the nut. Under normal circumstances, it is only necessary to overcome the friction force generated by the pre-tightening force of the bolt, so the force is not very large. But when the nut is rusted, it needs a great tightening force to loosen it. This design scheme adopts the clamping principle of the three-jaw chuck to realize the clamping of the nut, which has a large clamping force on the nut and provides sufficient clamping force for the parts or nuts clamped by the three-jaws. At the same time, the wrench of the utility model is suitable for nuts or screws with round, regular triangle and regular hexagonal ends, and has good adaptability.

In real life, the wrenches used are solid wrench, adjustable wrench and socket wrench. The solid wrench is a structure with a fixed size opening at one end or both ends, and the adjustable wrench is a structure whose opening width can be adjusted within a certain size range. The socket wrench is composed of multiple sockets with hexagonal or twelve-pointed holes and equipped with various accessories such as handles and rods. Whether it is a solid wrench or an adjustable wrench, when screwing nuts or bolts, It will cause damage to the nut or bolt, and even the hexagonal edge will be stuck. The socket wrench solves the problem of damage to the nut or bolt, but the socket wrench is not adjustable and can only be pre-tightened or loosened. Bolts and nuts of a particular specification. The three-jaw clamping method can solve the problem that the hexagonal edges of the nut will not be worn when the nut is tightened or loosened.

The other end of the end face threaded sleeve 4 is made into a reticulated outer circle, a straight grained outer circle or a regular hexagonal end, the purpose of which is to make people have a greater frictional force when twisting the end face threaded sleeve. When the nut that is easy to rotate is twisted, the clamping of the nut by the three claws can be realized by twisting the end face threaded sleeve 4 by hand. When twisting the rusty nut, use a general-purpose wrench to twist the regular hexagonal end on the upper part of the end threaded sleeve 4, drive the end face threaded sleeve to rotate, and drive the three claws to move and clamp the rusted nut to obtain a larger grip. tension.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present utility model shall be included in the Within the protection scope of the present utility model.

Claims (3)

1. a kind of three-jaw movable ratchet carring hand, including lower ejector lever frame（2）, it is characterised in that：Ratchet dog plate（3）It is arranged on down Wrench rack（2）End endoporus in, end-face helical set（4）It is installed to ratchet dog plate（3）In, ratchet dog plate（3）Bottom Provided with installation claw（1）Three locating grooves, claw（1）It can be moved in locating groove, end-face helical set（4）Lower end Face and claw（1）Upper surface be provided with cooperate end-face helical, clamping sleeve（6）With ratchet dog plate（3）Connected by screw thread Connect, end-face helical set（4）External diameter and clamping sleeve（6）Internal diameter have gap, end-face helical set（4）In ratchet dog plate（3）In Can freely it rotate, upper ejector lever frame（5）With lower ejector lever frame（2）Pass through pin two（12）Fixation is riveted together, ratchet（9）, steel Pearl（10）With spring（11）It is installed along with lower ejector lever frame（2）With upper ejector lever frame（5）Between neck in, ratchet（9）With ratchet Dog plate（3）It is meshed, pin one（8）With ratchet（9）It is fixedly connected, allocates head（7）With pin one（8）It is fixedly connected, spring （11）Hold out against steel ball（10）, steel ball（10）Withstand on ratchet（9）In the groove of bottom.

2. three-jaw movable ratchet carring hand according to claim 1, it is characterised in that：Described ratchet（9）Be provided with it is left, Right two and ratchet dog plate（3）The teeth portion being meshed, ratchet（9）Bottom be provided with left and right two and steel ball（10）What is coordinated is recessed Groove.

3. three-jaw movable ratchet carring hand according to claim 1, it is characterised in that：Described end-face helical set（4）'s Top is provided with that reticulate pattern is cylindrical, straight burr is cylindrical or regular hexagon termination.