CN210060924U - Open ratchet wrench - Google Patents

Abstract

The utility model discloses an open ratchet wrench, which comprises a wrench head seat for setting an opening for receiving a fixed workpiece, wherein the wrench head seat comprises a first clamping jaw, and the first clamping jaw at least comprises a first pushing surface attached to the surface of the fixed workpiece; a second jaw including an arcuate inner surface facing the opening and a movable blade mounted on the second jaw, the movable blade being movable with the second jaw; the movable spanner sheet at least comprises a second pushing surface, the movable spanner sheet also comprises an arc-shaped outer surface which is attached to the arc-shaped inner side surface of the second clamping jaw, and the movable spanner sheet slides along the arc-shaped inner side surface of the second clamping jaw; the second clamping jaw comprises a supporting keel, the movable pull piece comprises a near end and a tail end, the near end protrudes to form a tip, a cavity for accommodating the tip is formed in the arc-shaped inner side surface of the second clamping jaw, the supporting keel comprises an arc-shaped guide groove, and the movable pull piece is assembled on the second clamping jaw by penetrating the arc-shaped guide groove through the bolt.

Description

Open ratchet wrench

Technical Field

The utility model relates to an open end wrench. And more particularly to an open ratchet wrench.

Background

As is known in the art, fastening workpieces (such as hex nuts, hex bolts, and hex joints for hydraulic lines) often require twisting to achieve tightening of the assembly, e.g., tightening or loosening of the fastening workpiece as the threaded member is rotated; the common hand tools capable of wrenching the fixing element for twisting have two shapes, namely a ratchet wrench and an open crescent wrench; ratchet wrenches generally pull the sealed headstock completely enclosed and sleeved at the top or bottom of the fixed workpiece (depending on the direction of the fixed workpiece); the open type wrench is wrenched by inserting the opening of the head seat from the side of the fixed workpiece.

As known in the art, ratchet wrenches are particularly useful in small spaces where the wrench cannot be side-inserted and wrenched, while open-ended wrenches are particularly useful in larger spaces where the wrench can be side-inserted and wrenched from a fixed workpiece.

Therefore, what is needed is an open ratchet wrench that can handle any space and is suitable for use.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an open type ratchet spanner, this spanner can both use in any space.

According to one aspect of the present invention, there is provided an open ratchet wrench comprising a wrench head seat configured to receive an opening for a fixed workpiece, the wrench head seat comprising a first jaw, the first jaw comprising at least a first pushing surface engaging a surface of the fixed workpiece; a second jaw including an arcuate inner surface facing the opening and a movable blade mounted on the second jaw, the movable blade being movable with the second jaw; the movable spanner sheet at least comprises a second pushing surface, the movable spanner sheet also comprises an arc-shaped outer surface which is attached to the arc-shaped inner side surface of the second clamping jaw, and the movable spanner sheet slides along the arc-shaped inner side surface of the second clamping jaw;

the second clamping jaw also comprises a supporting keel which extends from the arc inner side surface to the opening, the movable pulling sheet comprises a near end and a tail end, the near end of the movable pulling sheet is separated by an open space and then combined at the tail end, the supporting keel of the second clamping jaw is positioned in the open space between the two pulling sheet components of the movable pulling sheet, the near end of the movable plate sheet protrudes to form a tip, the arc inner side surface of the second clamping jaw is provided with a cavity for accommodating the tip, the supporting keel comprises an arc guide groove, and the spanner head seat comprises a bolt which is fixed on the two pulling sheet components of the movable pulling sheet, so that the bolt passes through the arc guide groove and is assembled on the second clamping jaw.

Preferably, the opening of the wrench head seat is partially enclosed, and an entrance is provided between the first jaw and the movable wrench plate for receiving a fixed workpiece.

Preferably, the arc inner side surface of the second clamping jaw and the arc outer surface of the movable spanner piece have the same arc.

Preferably, the arcuate guide channel has a length sufficient to allow the pin to move within the arcuate guide channel.

Preferably, the arcuate guide channel is oriented to allow the latch to move so that the arcuate outer surface of the movable blade slides over and does not contact the arcuate inner surface of the second jaw.

Preferably, the latch moves within the arcuate guide channel without touching the support keel.

Preferably, the wrench head seat further comprises a spring attached between the wrench head seat and the movable blade.

Preferably, the first and second pushing surfaces are both planar.

Preferably, the first clamping jaw and the movable spanner piece are provided with a six-point angle end sleeving shape.

Preferably, the centers of symmetry of the first and second push surfaces are each provided with a recess.

The utility model has the advantages as follows:

according to the utility model discloses an open ratchet spanner, include one open in order to accept the spanner headstock of fixed work piece with the spanner: the spanner headstock is including a first clamping jaw, second clamping jaw and install the activity spanner piece on the second clamping jaw: the first clamping jaw is provided with a first pushing surface capable of receiving and fixing a workpiece: the second clamping jaw is provided with an arc inner side surface facing the opening; the movable pulling sheet is provided with a second pushing surface and a third pushing surface which can receive and fix a workpiece on the inner side, an arc-shaped outer surface which can be attached to the arc-shaped inner side surface of the second clamping jaw is arranged on the outer side, and the movable pulling sheet is arranged on the supporting keel of the second clamping jaw to slide along the arc-shaped inner side surface of the second clamping jaw by the arc-shaped outer surface.

The opening is a partially closed wrench head seat, and an inlet between the first clamping jaw and the movable wrench plate can receive and fix a workpiece: the radian of the arc-shaped inner side surface of the second clamping jaw is the same as that of the arc-shaped outer surface of the movable spanner piece; the second jaw further includes a support keel extending from the arcuate inner surface toward the opening: the movable wrench plate comprises a proximal end and a distal end, and the movable wrench plate further comprises wrench plate members which are separated by an open space at the proximal end and connected with the distal end; the support keel of the second clamping jaw is arranged in the open space of the plate member of the movable plate: the supporting keel comprises an arc-shaped guide groove, and the wrench head seat further comprises a bolt which is fixed on the wrench plate member to pass through the through hole to install the movable wrench plate on the second clamping jaw; the length of the arc-shaped guide channel is enough to enable the bolt to move along with the arc-shaped guide channel; the direction of the arc-shaped guide groove is properly set so that the bolt can move, and when the movable pulling sheet slides along the arc-shaped inner side surface of the second clamping jaw by the arc-shaped outer surface, the arc-shaped outer surface and the arc-shaped inner side surface are not contacted with each other; when the bolt moves in the arc guide way, do not paste each other with the support fossil fragments and touch: the remote spanner piece component of the movable spanner piece comprises a through hole, and the spanner head seat comprises a bolt which is attached to the support keel and penetrates through the through hole on the spanner piece component; the size of the through hole of the proximal spanner piece member of the movable spanner piece is larger than that of the bolt.

When the size of fixed work piece is less, the movable plate piece can excessively rotate, the bolt and the contact of arc guide way, there is the possibility of passing through bolt transmission torsion, this will damage the bolt, consequently, protruding formation pointed end in the near-end of movable plate piece, the chamber that holds most advanced is formed at the arc inside surface of second clamping jaw for when bolt and arc guide way contact, pointed end and chamber contact simultaneously prevent that the movable plate piece is further rotatory, will rotate torsion transmission to fixed work piece through most advanced, thereby the protection bolt avoids the damage.

The wrench head seat further comprises a spring arranged on the first pushing surface and the second pushing surface, so that the first clamping jaw and the movable wrench piece can set a six-point angle end-shaped wrench; in addition, notches are respectively arranged on the first pushing surface and the second pushing surface of the wrench head seat, so that the first clamping jaw and the movable wrench plate can set a twelve-point end-shaped wrench; the first jaw is stationary relative to the second jaw.

Drawings

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.

Fig. 1 is a front view of the open ratchet wrench of the present invention.

Fig. 2 shows an assembly structure diagram of the open ratchet wrench of the present invention.

Fig. 3A is a schematic view of a wrench head seat of the open ratchet wrench of the present invention.

Fig. 3B shows a schematic structural view of a movable plate of the open ratchet wrench of the present invention.

Fig. 3C shows a right side view of the adjustable blade of the open ratchet wrench of the present invention.

Fig. 3D shows a left side view of the adjustable plate of the open ratchet wrench of the present invention.

Fig. 4 shows a relationship diagram of the spring and the adjustable plate of the open ratchet wrench assembly of the present invention.

Fig. 5 is a schematic structural view of the open ratchet wrench of the present invention driving the fixed workpiece.

Fig. 6 shows a schematic structural view of the ratchet operated by the open ratchet wrench of the present invention.

Fig. 7 is a schematic structural view of a fixed workpiece of a smaller operation driving size of the open ratchet wrench of the present invention.

Detailed Description

In order to explain the present invention more clearly, the present invention will be further described with reference to the preferred embodiments and the accompanying drawings. Similar parts in the figures are denoted by the same reference numerals. It is to be understood by persons skilled in the art that the following detailed description is illustrative and not restrictive, and is not to be taken as limiting the scope of the invention.

Referring to fig. 1, an open ratchet wrench 1 includes an elongated handle 6 and a headstock 2 having an opening 3. The fixation piece 5 may be loaded, e.g. inserted into the opening 3, in a direction y substantially coinciding with the longitudinal axis of the elongated handle 6. This manner of engaging the fixed workpiece 5 is sometimes referred to as side engaging pulling. The so-called fixing means 5 may be a head of a hexagonal bolt or a hexagonal nut. The wrench 1 is fitted properly to the side of the fixed workpiece 5, with portions of one or more surfaces of the fixed workpiece 5 engaging one or more push surfaces 13, 15, 17 of the headstock 2. The user can rotate the handle 6 in the x-y plane to apply a force or torque to the stationary workpiece 5 via the push surfaces 13, 15, 17. The stationary workpiece 5 may be rotated about the center point 19 (or CW center point). The user can rotate the fixed workpiece 5 continuously to the right (counterclockwise direction, in the return direction R) and to the left (clockwise direction, in the drive direction D) by the handle 6 without unloading the fixed workpiece 5 from the opening 3.

Referring to fig. 1, 2 and 3A-3D, an open ratchet wrench 1 is shown in which the configuration is as follows: the head 2 comprises a pair of stationary first jaws 4 and second jaws 8 connected to a handle 6, in which method the stationary first jaws 4 are formed integrally with the stationary second jaws 8 and the handle 6, the first jaws 4 comprising a first pushing surface 13 facing the opening 3, the second jaws 8 supporting movable jaws 14 provided with second 15 and third 17 pushing surfaces; the first pushing surface 13, the second pushing surface 15 and the third pushing surface 17 may be flat (as shown in fig. 1) or have recesses 40, 42 (as shown in fig. 2 and 3A-3C).

Referring again to fig. l, in which the fixed workpiece 5 is completely inserted into the opening 3 of the wrench 1, the first, second and third pushing surfaces 13, 15, 17 may define a range of 270 degrees (indicated by a dashed line 51) of the fixed workpiece 5 at the opening 3, wherein an angle end 31 of 120 degrees is formed between the second and third pushing surfaces 15, 17; the wrench 1 can be rotated by 60 degrees or a standard position, and the fixed workpiece 5 is sleeved on each pushing surface 13, 15, 17, which is generally called a hexagonal end sleeved form; i.e. the first and second push surfaces 13, 15 define dimensions sufficient to engage the sides of the fixed workpiece 5; the first and second pushing surfaces 13 and 15 are further provided with notches 40 and 42 for dividing the upper cutting surfaces 13a and 15b and the lower cutting surfaces 13b and 15 a; when the handle 6 is rotated in the driving direction D, the torque is transmitted to the fixed workpiece 5 through the upper cutting surfaces 13a and 15b and the third pushing surface 17; when the handle 6 is turned in the ratchet rotation direction R, the fixed workpiece 5 remains stationary, and the pulling torque can be released from the movable blade 14 through the lower cutting surfaces 13b, 15 a.

Referring to fig. 2 and fig. 3A to fig. 3D, the first pushing surface 13 is divided into two partial cutting surfaces 13A and 13b by the notch 40, and the second pushing surface 15 is also divided into two partial cutting surfaces 15a and 15b by the notch 42, that is, when the hexagonal fixed workpiece 5 is sleeved on the first clamping jaw 4 and the movable wrench piece 14 at the standard position, a 30-degree rotation position is formed by the cutting surfaces 13A, 13b, 15a and 15b divided by the notches 40 and 42; the first pushing surface 13 is a cut surface 13a, 13b divided by a notch 40, and the notch 40 comprises an upper inclined cut surface 40a and a lower inclined cut surface 40b opposite to the corner end 31; namely, the upper and lower inclined cut surfaces 40a and 40b of the notch 40 can be jointed with the cut surfaces 13a and 13b to form a 120-degree jointing surface for jointing the fixed workpiece 5; or other angles may alternatively be used. The second pushing surface 15 is divided into two upper and lower cutting surfaces 15a, 15b by the notch 42, and the notch 42 includes upper and lower oblique cutting surfaces 42a, 42b meeting the corner end 31, i.e. the upper and lower oblique cutting surfaces 42a, 42b of the notch 42 can be connected with the upper and lower cutting surfaces 15a, 15b and the third pushing surface 17 to form a 120-degree connecting surface connected with the fixed workpiece 5, or other angles can be used. When the wrench 1 is sleeved with the fixed workpiece 5 at a standard position and the handle 6 is rotated into the driving direction D, a torque is applied to the fixed workpiece 5 through the upper cutting surfaces 13a and 15b and the second pushing surface 15; when the wrench 1 is sleeved with the fixed workpiece 5 at a standard position and the handle 6 is rotated to the ratchet wheel rotating direction R, the fixed workpiece 5 is still static, and can apply pressure to the lower cutting surfaces 13b and 15a, so that the fixed workpiece can be separated from the first pushing surface 13 of the first clamping jaw 4 and the second pushing surface 15 of the movable spanner piece 14; and the third push surface 17 is provided on the inner surface of the overhanging member 28 facing the opening 3.

When the wrench 1 is rotated by 30 degrees to fit the fixed workpiece 5 and the handle 6 is rotated to the driving direction D, the torque is transmitted to the fixed workpiece 5 through the lower bevel 40a and the upper bevel 42 a; the wrench 1 is sleeved with the fixed workpiece 5 at a 30-degree rotating position, and when the wrench 6 rotates to the ratchet wheel rotating direction R, the fixed workpiece 5 is still static, and can apply pressure to the lower inclined cutting surface 42b so as to be separated from the first pushing surface 13 of the first clamping jaw 4 and the second pushing surface 15 of the movable wrench piece 14; referring again to fig. 2 and fig. 3A and 3B, the movable blade 14 slides on the keel 16 of the second jaw 8; the arcuate outer surface 18 of the movable trigger 14 causes the movable trigger 14 to engage the arcuate inner surface 27 of the outer member 23 of the second jaw 8; the arcuate outer surface 18 can then slide along the arcuate inner side surface 27 without disengaging; in some embodiments, the thickness of the outer member 23 of the second jaw 8 may be the same as the first jaw 4: the keel 16 extends between the arcuate inner side surface 27 of the second jaw 8 and the first jaw 4, for example by an overhang member 29; the thickness t of the keel 16 is approximately one-third of the thickness W of the lateral member 23 and is located at the center point of the width W; the arcuate medial surface 27 is divided into two portions by the spine 16, each portion having a width approximately one-third the thickness W of the lateral member 23; in some embodiments, the second jaw is larger and more arcuate than the first jaw 4; the second jaw 8 may also protrude further from the handle 6 than the first jaw 4.

The assembly form of the movable wrench piece 14 is that the movable wrench piece 14 can be arranged on the second clamping jaw 8, and the movable wrench piece 14 can be arc-shaped or kidney-shaped and long; the movable blade 14 encloses a solid end 33 and a slotted proximal end 35 and has a thickness q substantially the same as the thickness W of the second jaw 8; the slotted proximal end 35 includes two blade members 35a, 35b separated by an open space 45. The slotted proximal end 35 is convexly formed to a tip 35c, i.e. both plate members 35a, 35b are provided with a tip 35c, and the arcuate inner side surface of the second jaw is provided with a cavity 27a for receiving the tip 35c, the tip 35c being movable within the cavity 27 a.

After the second clamping jaw 8 is properly assembled, the plate members 35a and 35b on the movable plate 14 are positioned at two sides of the keel 1, and the keel 16 is positioned in the open space 45; the arc-shaped outer surface 18 of the movable trigger 14 and the arc-shaped inner side surface 27 of the second clamping jaw 8 have the same arc and are centered on the central point 39 of the movable trigger 14 (CMP 39); the center point (CMP39) is offset from the center point (shown in FIG. 1) of the nested stationary workpiece 5(CW 19); when the movable trigger 14 moves, the arc-shaped outer surface 18 can still keep a fit state along the arc-shaped inner side surface 27; the second jaw 8 can prevent the movable plate 14 from moving away from the first jaw 4 during the sleeving and operation of the fixed workpiece 5 through the keel 16; in the deviation action of the CWP39 from the CW19, the movable trigger 14 moves downwards towards the handle 6; and away from CW19 during ratchet plate rotation.

In addition to engaging the second pushing surface 15, the throw 14 further includes an outwardly extending member 28 adjacent the solid end 33 to engage the second pushing surface 15 with the third pushing surface 17; the third pushing surface 17 extends out towards the opening 3 in a way of forming an angle of 120 degrees with the y axis; the length of the overhanging member 28 is such that it does not protrude too far into the opening 3; the wrench 1 can be sleeved and fixed with the workpiece 5 from the side by the activity of the movable wrench piece 14 and the extending component 28; the angle of the extension member 28 with the third push surface 17 allows the wrench 1 to fully engage the fixed workpiece 5.

The movable spanner 14 is located at both sides of the keel 16 by the spanner components 35a, 35b, and then fixed on the movable spanner 14 by the bolt 10 passing through the through holes 37a, 37b, the bolt 10 moving in the arc-shaped guide groove 12 of the keel 16; the arc guide groove 12 is provided with an upper arc surface 12a and a lower arc surface 12b, and the upper arc surface 12a and the lower arc surface 12b are both positioned at the center point of the CMP19 together and are aligned with the arc outer surface 18 of the movable pull plate 14 and the arc inner side surface 27 of the second clamping jaw 8; the arcuate guide channel 12 is larger than the pin 10 so that it can move from the proximal end 12c to the distal end 12d in the upper and lower arcuate surfaces 12a, 12b without touching any surface of the arcuate guide channel 12; the trip plate 14 can be manipulated to move around the CMP39 as the latch 10 moves.

Spaced from each other by suitable distances from the pushing surfaces of the first jaw 4 and the movable blade 14 to define a central opening 3 for receiving a fixed workpiece 5; the first clamping jaw 4 and the movable spanner piece 14 can be sleeved with the opening 3 for fixing the workpiece 5 and keep unchanged when the ratchet wheel rotates; that is, when the ratchet wheel is rotated, the wrench 1 can be rotated around the CW19 of the fixed workpiece 5 without withdrawing from the fixed workpiece 5.

Referring to fig. 4, the spring 24 is shown, wherein the coil spring 24 is located on the wrench head seat 2 at the end of the handle 6; the distal end 41 of the spring 24 is captured in the bore 26 of the wrench head carrier 2 and secured with the plug 32; the other end of the spring 24 engages the latch 10 and pushes the movable blade 14 towards the opening 3 with force F on the latch 10; the spring 24 extends into the arcuate guide channel 12 and engages the latch 10 exposed in the open space 45 between the blade members 35a, 35b (shown in FIG. 3C); the blade members 35a, 35b may be sized to have a length that covers the arcuate guide channel 12 to prevent the spring 24 and the latch 10 from disengaging.

When the movable spanner piece 14 is subjected to external force (not the original force applied by the wrench 1), the spring force F pushes the bolt 10 to the tail end 12d of the arc-shaped guide groove 12 to stop, and the wrench 1 finishes locking and is not sleeved with the fixed workpiece 5; when the fixed workpiece 5 is positioned between the first clamping jaw 4 and the movable pulling plate 14, the bolt 10 is pushed away from the tail end 12d of the arc-shaped guide groove 12; in some implementations, the dimensions of the arcuate guide channel 12 and the characteristics of the spring 24, such as the spring rate, are selected during the operative securing of the workpiece 5, while the latch 10 is not actually in contact with the ends of the arcuate guide channel 12 and the faces 12a, 12b, 12c, 12 d; the actual torque force generated by moving or rotating the fixed workpiece 5 is completely transmitted to the first clamping jaw 4 and the second clamping jaw 8 without passing through the bolt 10; the bolt 10 is used for fixing the movable wrench plate 14 and preventing the movable wrench plate from falling off the head seat 2 of the wrench 1; virtually all of the applied force and torque is transmitted through the arcuate outer surface 18 of the movable blade 14 and the arcuate inner surface 27 of the second jaw 8.

The wrench 1 can be sleeved by the side edge of a fixed workpiece 5, and one end of the fixed workpiece 5 is provided with a width S larger than an opening 3(P) of a headstock 2; the user can apply force to push the movable wrench piece 14 against the spring force F to push the fixed workpiece 5 forward to the opening 3; for example, the movable trigger 14 and latch 10 may be pushed down around the CMP39 to nest the stationary workpiece 5 into the open 3 space; the spring 24 provides tension against the bolt 10 to return the movable blade 14 to the locked position to grip the properly installed stationary workpiece 5.

Referring to fig. 5 and 6, the condition of the wrench 1 during driving and ratchet rotation is shown; the user can continuously pull the handle 6 in the driving direction D (clockwise, as shown in fig. 5) and drive the fixed workpiece 5 in the ratchet rotating direction R (counterclockwise, as shown in fig. 6) without withdrawing the wrench 1 from the fixed workpiece 5; when pulling in the driving direction D, the fixed workpiece 5 is in a stationary state and the movable blade 14 slides toward the wrench grip 6.

Referring to fig. 5, the fixing member 5 is located in the opening 3 of the wrench 1; when a user pulls the wrench 1 along the driving direction D (clockwise direction), the stationary first jaw 4 and the stationary second jaw 8 receive the torque force operated by the user and rotate along the driving direction D; the second clamping jaw 8 receives the torsion operated by the user and rotates along the driving direction D; the first clamping jaw 4 directly transmits the torque force to the fixed workpiece 5 through the upper cutting surface 13a and the side surface of the fixed workpiece 5 so as to pull the workpiece along the driving direction D; the second clamping jaw 8 opposite to the first clamping jaw 4 transmits the wrenching torsion force of the arc-shaped inner side surface 27 to the arc-shaped outer surface 18 of the movable wrench plate 14; the upper cutting surface 15b and the third pushing surface 17 of the movable wrench plate 14 transmit the torque to the fixed workpiece 5 to wrench the fixed workpiece 5 in the driving direction D; the wrench is turned enough to move the movable wrench plate 14 in the opposite direction of the driving direction D; this urging action prevents the arcuate outer surface 18 from engaging the arcuate inner surface 27 of the second jaw 8; the movable pulling plate 14 is still in a locking state and is in a static state for the first clamping jaw 4 and the second clamping jaw 8; the torque from the first jaw 4 and the movable blade 14 pulls the workpiece in the driving direction D. When a twisting force is applied to the fixed workpiece 5 of a standard size, the plug pin 10 is not in contact with the end 12d of the arc-shaped guide groove 12, and the tip 35c is not in contact with the cavity 27 a.

Referring to fig. 3 and 5, in the wrench 1 with twelve-point end socket configuration, the fixed workpiece 5 is rotated 30 degrees, and the torque is transmitted to the fixed workpiece 5 through the lower inclined cutting surface 40a of the recess 40 of the first pushing surface 13 of the first clamping jaw 4 and the upper inclined cutting surface 42a of the recess 42 of the second pushing surface 15 of the movable wrench piece 14.

Please refer to fig. 6, in which the wrench 1 rotates along the ratchet rotation direction R (counterclockwise direction); the side surfaces of the fixed workpiece 5 exert force on the lower cutting surface 15a of the movable spanner piece 14; this force pushes the movable trigger 14 toward the spring 24 (as shown in FIG. 4); the latch 10 slides down towards the proximal end 12c of the arcuate guide channel 12 and the movable blade 14 slides down along the arcuate inner side surface 27 of the second jaw 8; the width of the opening 3 between the stationary first jaw 4 and the movable blade 14 is increased so that the wrench 1 can ratchet around the stationary workpiece 5.

The wrench in the twelve-point corner end form and the fixed workpiece 5 are in a thirty-degree rotation position, and when the wrench 1 is in the ratchet rotation position, each side surface of the fixed workpiece 5 applies force to the movable plate piece 14 through the lower inclined cutting surface 42b of the notch 42 of the second pushing surface 15 of the movable wrench piece 14.

The handle 6 is firstly rotated along the ratchet wheel rotating direction R, and the bolt 10 slides along the arc-shaped inner side surface 27 of the second clamping jaw 8 towards the proximal end 12c and the arc-shaped outer surface 18 of the movable pulling plate 14 through the arc-shaped guide groove 12; the movable trigger 14 moves from the locking state (shown in fig. 5) to the unlocking state; therefore, when the handle 6 rotates along the ratchet wheel rotating direction R, the movable plate 14 slides arcuately along the stationary first jaw 4 and the stationary second jaw 8; the arcuate sliding movement of the trip blade 14 is then limited by the movement of the bolt 10 and its own arcuate outer surface 18 on the arcuate inner side surface 27 of the second jaw 8.

The location of the CMP39 and the orientation of the arcuate guide channel 12 and the arcuate outer surface 18 and the arcuate inner surface 27 are selected so that the movable trigger 14 moves downwardly and outwardly relative to the fixed workpiece 5; the wrench 1 can be rotated to fix the workpiece 5 while keeping enough clearance so as not to hit the hexagonal corner end of the fixed workpiece 5 against the first and second pushing surfaces 13, 15; the second and third pushing surfaces 15, 17 of the movable spanner 14 and the first pushing surface 13 of the first jaw 4 slide on the side surfaces of the fixed workpiece 5, so that the fixed workpiece 5 is in a stationary state.

Referring again to fig. 7, which shows the wrench 1 driving a fixed workpiece 5 that is undersized or worn, there is a possibility that a torque may be transmitted through the bolt 10 due to the bolt 10 contacting the end 12d of the arcuate guide channel 12 as the blade 14 has been over-rotated, which may cause the bolt 10 to break. Thus, with the pointed end 35c at the grooved proximal end 35 of the movable plate and the cavity 27a at the arcuate inside surface 27 of the second jaw, the pointed end 35c transmits rotational pressure to the stationary workpiece 5 by contact of the pointed end 35c with the cavity 27a as a hard stop for any further rotation of the movable plate 14, thereby protecting the bolt 10 from damage.

In the wrench with the six-point angle end sleeved form shown in fig. 1, about sixty degrees of the wrenching action of the handle 6 is completed by the first clamping jaw 4 and the movable wrench piece 14 bypassing one angle end 49 of the hexagonal fixed workpiece 5; since each corner end of the fixed workpiece 5 passes through the flat second pushing surface 15 and then enters the adjacent corner end 31, the spring force applied by the spring 24 to the movable blade 14 urges the movable blade 14 to return to the position shown in fig. 5; in other twelve-point wrench configurations shown, only thirty degrees of rotation are required before each corner of the fixed workpiece 5 is moved into the adjacent corner 31 and/or the movable blade 14.

The drive D and the direction of rotation R of the ratchet wheel can be changed by rotating the handle 6 one hundred eighty degrees on the y-axis, so that in top view the first jaw 4 is located to the right of the fixed workpiece 5; in this mode, the drive direction D is counterclockwise and the ratchet direction R is clockwise.

The components in the wrench 1 can be manufactured and assembled in one piece; materials suitable for use in the components of wrench 1 include tool steel, hardened steel, or other materials; the static first clamping jaw 4, the second clamping jaw 8 and the movable spanner plate 14 in each type of assembly can be made of the same or different materials; the wrench 1 can be enlarged or reduced according to the standard and metric open-end wrench specification; in partial operation, the static first clamping jaw 4 and the static second clamping jaw 8 of the wrench can receive movable wrench plates 14 with different sizes to match the openings 3 with different sizes; the appropriate size wrench blade 14 can be selected and assembled with a wrench jaw to fit a particular size and shape of fixed workpiece 5 without the need for a separate wrench.

Other embodiments are within the scope of the following claims:

for example, the wrench may have an elongated plate with more or fewer components; the movable spanner plate and the static clamping jaw can be in other shapes; the arcuate guide channel and the pin are reversibly mountable for setting the pin on the keel with the arcuate guide channel being set at the proximal end of the movable blade.

For example, the wrench handle need not be in-line with the jaws or in-plane with the jaws; for example, the handle may be offset from the jaw in a sharp angle to the jaw plane or away from the jaw plane; the wrench handle and jaws may be made of different parts and joined by a bayonet; the adjusting bolt can pivot the handle upwards or downwards from the plane of the wrench head seat; the wrench handle may be arcuate or otherwise shaped.

For example, the wrench may be provided with a shortened handle embedded in a square hole to accommodate a torque wrench, such as a pry foot design.

For example, the wrench may have a wrench head seat attached to each end of the wrench handle; each wrench head seat can be attached with a first clamping jaw, a second clamping jaw and a movable wrench sheet arranged on the second clamping jaw; the first clamping jaw and the movable spanner plate comprise various surfaces for receiving and fixing the workpiece; the wrench head seat at one end of the wrench handle may include a different size or shape opening included in the wrench head end at the other end of the wrench handle, or two different openings may receive different size or shape openings.

For example, unlike a coil spring, a flat spring or other type of spring may engage the latch and command movement of the movable blade; the spring may be secured to the wrench handle or the wrench head seat in other ways.

Obviously, the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention, and it is obvious for those skilled in the art to make other variations or changes based on the above descriptions, and all the embodiments cannot be exhausted here, and all the obvious variations or changes that belong to the technical solutions of the present invention are still in the protection scope of the present invention.

Claims (10)

1. An open ratchet wrench, comprising: the wrench head seat comprises a first clamping jaw, and the first clamping jaw at least comprises a first pushing surface attached to the surface of the fixed workpiece; a second jaw including an arcuate inner surface facing the opening and a movable blade mounted on the second jaw, the movable blade being movable with the second jaw; the movable spanner sheet at least comprises a second pushing surface, the movable spanner sheet also comprises an arc-shaped outer surface which is attached to the arc-shaped inner side surface of the second clamping jaw, and the movable spanner sheet slides along the arc-shaped inner side surface of the second clamping jaw;

the second clamping jaw also comprises a supporting keel which extends from the arc inner side surface to the opening, the movable pulling sheet comprises a near end and a tail end, the near end of the movable pulling sheet is separated by an open space and then combined at the tail end, the supporting keel of the second clamping jaw is positioned in the open space between the two pulling sheet components of the movable pulling sheet, the near end of the movable plate sheet protrudes to form a tip, the arc inner side surface of the second clamping jaw is provided with a cavity for accommodating the tip, the supporting keel comprises an arc guide groove, and the spanner head seat comprises a bolt which is fixed on the two pulling sheet components of the movable pulling sheet, so that the bolt passes through the arc guide groove and is assembled on the second clamping jaw.

2. The open ratchet wrench of claim 1, wherein: the opening of the wrench head seat is partially enclosed, and an inlet is arranged between the first clamping jaw and the movable wrench plate to receive a fixed workpiece.

3. The open ratchet wrench of claim 1, wherein: the radian of the arc-shaped inner side surface of the second clamping jaw is the same as that of the arc-shaped outer surface of the movable pulling sheet.

4. The open ratchet wrench of claim 1, wherein: the length of the arcuate guide channel is sufficient to allow the pin to move within the arcuate guide channel.

5. The open ratchet wrench of claim 4, wherein: the direction of the arc-shaped guide groove can move for the bolt, so that the arc-shaped outer surface of the movable pulling sheet slides on the arc-shaped inner side surface of the second clamping jaw without contacting.

6. The open ratchet wrench of claim 4, wherein: the bolt moves in the arc-shaped guide channel without touching the support keel.

7. The open ratchet wrench of claim 1, wherein: the wrench head seat further comprises a spring attached between the wrench head seat and the movable wrench plate.

8. The open ratchet wrench of claim 1, wherein: the first and second pushing surfaces are both planar.

9. The open ratchet wrench of claim 8, wherein: the first clamping jaw and the movable spanner piece are provided with a six-point angle end sleeving shape.

10. The open ratchet wrench of claim 1, wherein: the symmetrical centers of the first pushing surface and the second pushing surface are both provided with notches.

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