TWI684495B - Ratchet wrench capable of increasing torque - Google Patents

Abstract

The invention provides a ratchet wrench capable of improving torque, which includes a handle and an actuating head at one end of the handle. The actuating head has a set of holes and a receiving slot connecting the set of holes, and the connected set holes and The accommodating groove is provided with a rotating part, a ratcheting reversing group and a stopper; the rotating part has a ratcheting convex ring and a limit disc; the ratcheting reversing group has a dial of the cover group at both ends of the set hole The cover and a fixed cover, and a reversing tooth block, a linking member and a coil spring between the dial cover and the fixed cover, the stopper is slidingly combined with the surface of the dial cover in a concave-convex matching structure on the outside of the assembly hole, The stopper slides toward the limit disc from the grip, and one end is pushed into one of the limit grooves of the outer periphery of the limit disc to block the limit, so as to support the rotating component to have a greater output of torque.

Description

Ratchet wrench capable of increasing torque

The invention relates to the technical field of the structure of hand tools, in particular to a ratchet wrench capable of improving torque.

As shown in the US Patent No. US8596169B2 "ratchet wrench", its structure is shown in its FIG.1-4, a wrench head (reference number 12 in the figure) at one end of a ratchet wrench (reference number 10 in the figure) is provided with two parallel holes (figure The middle reference numerals 14 and 16) have a rotary member (reference numeral 20 in the figure) and a limit device (reference numeral 30 in the figure); wherein, the rotary member (reference numeral 20 in the figure) has a protrusion on the wrench head (reference numeral 12 in the figure) ) A convex cover (reference number 21 in the figure) and a plurality of cutouts (reference number 22 in the figure) located on the periphery of the convex cover (reference number 21 in the figure); and the restricting device (reference number 30 in the figure) includes a retaining block (reference number in the figure) Reference numeral 31) A cylinder extending downward (reference numeral 32 in the figure), and the cylinder 32 has a receiving groove (reference numeral 33 in the figure) to accommodate a spring (reference numeral 34 in the figure) and a sleeve (reference numeral 35 in the figure), and The cylinder 32 is also provided with an elastic bead (reference numeral 36 in the figure) and an annular groove (reference numeral 37 in the figure), and a C-shaped buckle (reference numeral 38 in the figure) is buckled on the annular groove 37. In this way, when the limiting device 30 can be raised and lowered relative to the wrench head 12 in the direction parallel to the rotating member 20, the retaining block 31 can be embedded in all the openings 22 on the periphery of the convex cover 21, thereby restricting the fixing of the rotating member 20 to improve The torque of the wrench.

However, in the above-mentioned prior art patent, the retaining block 31 is embedded in the opening 22 of the periphery of the convex cover 21 due to the lack of a guide structure. Therefore, once the retaining block 31 and the cutout 22 are in no relative position, To keep the retaining block 31 stuck and unable to enter the cutout 22, it must be readjusted to the relative position to enter the cutout 22, which results in unsmooth and inconvenient use, which is one of the shortcomings of the conventional patent.

Moreover, the assembly of the limiting device 30 in the wrench head 12 must match a complicated structure such as a cylinder 32, a receiving groove 33, a spring 34, a sleeve 35, an elastic bead 36, a ring groove 37 and a C-shaped buckle Coordination, in turn, increases the difficulty of assembling and prolongs the assembly time, which is unfavorable for the management of the construction period, which is the second shortcoming of the conventional patent.

In addition, the above-mentioned complicated assembly of many components will also increase the cost of spare parts for manufacturers, and it is not conducive to market competition. It is the third shortcoming of the conventional patent.

Therefore, how to deal with the above-mentioned conventional patent structure due to the lack of a guide structure will cause the retaining block 31 to be stuck and cannot enter the cutout 22, which causes discomfort and inconvenience in use, and the complexity of many components causes increased difficulty in assembly and assembly man-hours The extension and the shortcomings caused by the manufacturer's zero-year spare material cost increase are the difficulties for the case to solve.

The main object of the present invention is to provide a ratchet wrench capable of improving torque, sliding through the stopper of the dial cover or the fixed cover, and sliding from the grip toward the limit plate or limit flange of the rotating component The structure for blocking the limit position, with the plurality of limit grooves or the clamping groove of the limit flange of the limit disk having a notch larger than the stopper, it can be formed to guide the stopper into the limit groove and the clamping groove The effect of effectively improves the smoothness of operation and the convenience of use.

The second object of the present invention is to provide a ratchet wrench that can improve torque, further simplify the structure assembly with fewer components, simplify the structure assembly to shorten the labor cost, and achieve multiple economic benefits of reducing the cost of spare parts.

In order to achieve the above purpose and effect, the ratchet wrench of the present invention capable of increasing torque mainly includes a handle and an actuating head at one end of the handle, the actuating head has a set of holes and a receptacle communicating with the set of holes Groove, and the actuating head group is provided with a rotating member located in the assembly hole and the accommodating groove, a ratchet reversing group, and a stopper supporting the ratchet reversing group to increase torque output; the rotating member has A ratcheting convex ring and a limiting disc, the ratcheting convex ring is disposed on the outer peripheral side of the rotating member and is located in the set of holes, the limiting disc is disposed at one end of the rotating member and protrudes out of the set of holes, and The limit disc has a plurality of limit grooves ring-shaped on the outer periphery; the ratcheting reversing group has a dial cover and a fixed cover at the two ends of the set hole, and a cover between the dial cover and the fixed cover A reversing tooth block, a linking member and a coil spring, and two ends of the coil spring abut between the reversing tooth block and the linking member, the reversing tooth block engages with the ratcheting convex ring, and the fixed cover set On the rotating part and located on one side of the ratchet convex ring, the dial cover is set on the rotating part and between the other side of the ratchet convex ring and the limit disc, and the dial cover is provided with an extension receiving groove A toggle lever, the toggle lever drives the action of the linking member and the reversing tooth block to change the driving direction of engaging the ratcheting convex ring; the stopper is slidingly combined with the surface of the dial cover in a concave-convex matching structure , The stopper slides from the handle toward the limit disc, and one end of the stopper pushes into one of the limit grooves on the outer periphery of the limit disc to block the limit, and is used to support the rotating member to have a larger Torque output.

A further technical feature of the present invention is that the plurality of limiting grooves of the limiting disk respectively include a straight blocking surface and two mitering surfaces, and the two mitering surfaces and the straight blocking surface are connected to form an enlarged slot of the limiting groove, and the The two inner arc angles between the straight blocking surface and the two mitered surfaces are used to avoid stress concentration. The blocking member is a rectangular body with six surfaces, and the end of the blocking member facing the limit disc has a corresponding two inner arc angles. Two chamfering angles, the two chamfering angles at one end of the stopper enter the limit groove along the two inclined joint surfaces and abut against the two inner arc angles.

A further technical feature of the present invention is that the linking member has a dial slot facing the dial cover, the lever is inserted into the dial slot and the linking member is deflected, the coil spring deflects the linking member and pushes the reversing tooth block off Swing to change the driving direction of the switch to engage the ratchet ring.

The second ratchet wrench of the present invention, which can increase the torque, includes a handle and an actuating head at one end of the handle, the actuating head has a set of holes and a receiving slot communicating with the set of holes, and the actuating head The assembly is provided with a rotating member located in the assembly hole and the accommodating groove, a ratchet reversing group, and a stopper supporting the ratchet reversing group to improve torque output; the rotating member has a ratchet protruding ring and A limiting flange, the ratcheting convex ring is provided on the outer peripheral side of the rotating member and is located in the set hole, the limiting flange is provided on one side of the ratcheting convex ring and protrudes out of the set hole, and The limiting flange has a plurality of locking grooves arranged on the outer periphery; the ratcheting reversing group has a dial cover and a fixed cover at the two ends of the set hole, and is located between the dial cover and the fixed cover A reversing tooth block, a linking member and a coil spring, and the two ends of the coil spring abut between the reversing tooth block and the linking member, the reversing tooth block engages with the ratcheting convex ring, and the dial cover sleeve Set on the rotating part and located on one side of the ratcheting convex ring, the fixed cover sleeve is set on the rotating part and between the other side of the ratcheting convex ring and the limiting flange, and the dial cover is provided with an extension receiving space A lever of the groove, the lever moves the linking member and drives the commutating tooth block to change the driving direction of the bite ratchet ring; the stopper is combined with the surface of the fixed cover in a concave-convex matching structure sliding combination, The stopper slides in the direction of the limit flange from the grip, and one end of the stopper pushes into one of the locking grooves on the outer periphery of the limit flange to stop the limit, and is used to support the rotating member Large rotational torque output.

A further technical feature of the present invention is that the plurality of locking grooves of the limiting flange respectively include a straight blocking surface and two inclined joint surfaces, and the two inclined joint surfaces are connected to the straight blocking surface to form an enlarged notch of the locking groove, and The two inner arc angles between the straight blocking surface and the two mitered surfaces are used to avoid stress concentration, the blocking member is a rectangular body with six surfaces, and the end of the blocking member facing the limiting flange has corresponding two inner arcs The two chamfered angles of the angle, the two chamfered angles at one end of the stopper enter the clamping groove along the two inclined joint surfaces and abut against the two inner arc angles.

A further technical feature of the present invention is that the linking member has a dial slot facing the dial cover, the lever is inserted into the dial slot and the linking member is deflected, the coil spring deflects the linking member and pushes the reversing tooth block off Swing to change the driving direction of the switch to engage the ratchet ring.

(100)‧‧‧ wrench

(10)‧‧‧grip

(11)‧‧‧Actual head

(12) ‧‧‧ set hole

(13)‧‧‧accommodation slot

(20)‧‧‧rotating parts

(21) ‧‧‧ Ratchet ring

(22)‧‧‧Limit plate

(221)‧‧‧limit slot

(23)‧‧‧Limit flange

(231)‧‧‧Clamping slot

(2211)(2311)‧‧‧Direct blocking surface

(2212)(2312)‧‧‧mitered surface

(2213)(2313)‧‧‧Inner arc angle

(30) ‧‧‧ Ratchet Reversing Group

(31)‧‧‧Dial cover

(311)‧‧‧Chute

(312)‧‧‧Sleeve

(313)‧‧‧Lever

(32)‧‧‧Fixed cover

(321)‧‧‧Second Chute

(322)‧‧‧Second set of holes

(33)‧‧‧Reversing tooth block

(34)‧‧‧Link

(341)‧‧‧Dial

(35)‧‧‧coil spring

(40)‧‧‧stop

(41)‧‧‧slider

(42)‧‧‧Chamfer angle

The first figure is a three-dimensional schematic diagram of the first embodiment of the present invention.

The second figure is a three-dimensional exploded view of the first embodiment of the present invention.

The third figure is a three-dimensional exploded schematic view of the stopper and the cover of the present invention.

The fourth figure is a schematic plan view of the present invention.

The fifth figure is a schematic sectional view of the present invention according to the line segment V-V of the sixth figure.

The sixth figure is a schematic diagram of the limit groove of the stopper of the present invention pushing into the limit disc.

The seventh figure is a three-dimensional schematic diagram of the second embodiment of the present invention.

The eighth figure is a three-dimensional exploded view of the second embodiment of the present invention.

The ninth figure is a schematic sectional view of the present invention according to the seventh figure IX-IX line segment.

Figure 10 is a schematic cross-sectional view of the present invention according to the X-X line segment of Figure 9.

FIG. 11 is a schematic diagram of the limiting position of the locking groove of the limiting element pushed into the limiting flange of the present invention.

In order to achieve the above-mentioned object and effect, as well as the technical means and structure adopted by the present invention, the features and functions of the embodiments of the present invention are described in detail with reference to the drawings.

A ratchet wrench of the present invention that can increase torque includes two embodiments. For the first embodiment, please refer to the first to sixth figures. The ratchet wrench (100) includes a handle (10) and a handle (10). ) An actuating head (11) at one end, the actuating head (11) has a set of holes (12) and a receiving groove (13) communicating with the set of holes (12), the actuating head (11) is set up There is a rotating member (20) located in the assembly hole (12) and the accommodating groove (13), a ratchet reversing group (30), and a support for the ratchet reversing group (30) to increase the torque output The stop (40).

The rotating member (20) has a ratcheting convex ring (21) and a limit disc (22). The ratcheting convex ring (21) is disposed on the outer peripheral side of the rotating member (20) and is located in the set hole (12) Inside, the limit disk (22) is provided at one end of the rotating member (20) and protrudes out of the assembly hole (12), and the limit disk (22) has a plurality of limit grooves (221) which are annularly arranged on the outer periphery ).

The ratchet reversing group (30) has a dial cover (31) and a fixed cover (32) at the two ends of the set hole (12), and the dial cover (31) and the fixed cover (32) A reversing tooth block (33), a linking member (34) and a coil spring (35), and the two ends of the coil spring (35) bear against the reversing tooth block (33) and the linking member (34) During this time, the reversing tooth block (33) engages with the ratcheting convex ring (21), the fixed cover (32) is sleeved on the rotating member (20) and is located on the side of the ratcheting convex ring (21), the dial The cover (31) is set on the rotating member (20) and is located between the other side of the ratchet ring (21) and the limit disc (22). The dial cover (31) is provided with an extension receiving groove (13) ) A lever (313), the lever (313) drives the linkage (34) and the reversing gear (33) to change the driving direction of engaging the ratchet ring (21).

The blocking member (40) is combined with the surface of the dial cover (31) on the outside of the assembly hole (12) in a concave-convex matching structure, and the blocking member (40) is directed from the handle (10) toward the limit plate (22) Sliding, and one end of the blocking member (40) is pushed into one of the limiting grooves (221) of the outer periphery of the limiting disk (22) to block the limiting position for supporting the rotating member (20) with a larger Rotation torque output.

The foregoing is the main technical features of the main embodiment of the present invention, which corresponds to the first item of the scope of the patent application of this case, so that the purpose and implementation type of the present invention can be understood in detail, and the technical features described in the remaining subsidiary patent applications are for The detailed description or additional technical features of the first item of the patent application scope, rather than limiting the scope of the definition of the first item of the patent application scope, it should be understood that the first item of the patent application scope of this case does not necessarily include the description of the patent scope of the other subsidiary applications Technical characteristics.

The characteristics of each element of the present invention are further detailed below. In the first to sixth figures above, the plurality of limiting grooves (221) of the limiting disk (22) respectively include a straight blocking surface (2211) and two mitered surfaces (2212), the two inclined surfaces (2212) and the straight blocking surface (2211) are connected to form an enlarged slot of the limiting groove (221), and the straight blocking surface (2211) and the two inclined surfaces (2212) The two inner arc angles (2213) are used to avoid stress concentration, the stopper (40) is a rectangular body with six faces, and the end of the stopper (40) facing the limit disc (22) has a corresponding two inner The two chamfered angles (43) of the arc angle (2213), the two chamfered angles (42) at one end of the stopper (40) enter the limit groove (221) along the two inclined joint surfaces (2212) and lean against the two Arc angle (2213).

Moreover, as shown in the first to fifth figures, since the linkage (34) of the present invention has a dial groove (341) facing the dial cover (31), the lever (313) is inserted into the dial groove (341) and The toggle link (34) is deflected, the coil spring (35) is deflected corresponding to the link (34) and pushes the reversing gear block (33) to deflect to change the driving direction of the switch to engage the ratchet ring (21). In addition, it is worth mentioning that the concave-convex matching structure between the stopper (40) and the surface of the dial cover (31) is provided with a sliding groove on the dial cover (31) as shown in the second and third figures. 311) and a block (41) matched with the stopper (40) to slide the slide groove (311), but not limited to this. In addition, the dial cover (31) has a set of holes (312) for the set of rotating members (20), and one end of the sliding groove (311) communicates with the set of holes (312), the slider of the stopper (40) (41) An end communicating with the set of holes (312) slides into the sliding groove (311). Thereby, regardless of the direction in which the driving direction of the commutation tooth block (33) engaging the ratchet ring (21) is switched in the present invention, the stopper (40) can be moved toward the limit by the grip (10) The notch of one of the limit grooves (221) of the position plate (22) slides, so that the end of the stopper (40) with a chamfered angle (42) is pushed into the outer edge of the limit plate (22) One of the limit grooves (221) blocks the limit position, and is used to add the stopper (40) to push in addition to the torque formed by the existing reversing tooth block (33) engaging the ratchet ring (21) One of the limiting grooves (221) on the outer peripheral edge of the limiting disk (22) blocks the rotating member (20) to have a greater rotational torque output.

As shown in the sixth figure, since the operation of the stopper (40) of the present invention is to slide the grip (10) toward the notch of one of the limiting grooves (221) of the limiting disk (22), and the two The beveled surface (2212) can guide the stopper (40) into the limit groove (221), effectively improving the smoothness of operation and the convenience of use. Moreover, in the present invention, the concave-convex matching structure between the stopper (40) and the surface of the dial cover (31) is slidingly combined, and the limiting disk (22) limiting groove (20) from the handle (10) toward the rotating member (20) 221) The simplified structure of the sliding stop limit in the slot direction effectively simplifies the assembly of the structure to shorten the cost of working hours, and achieves multiple economic benefits of reducing the cost of spare parts.

In addition, for the second embodiment of the present invention, please refer to Figures 7 to 11; the ratchet wrench (100) includes a handle (10) and an actuating head (11) at one end of the handle (10) The actuating head (11) has a set of holes (12) and a receiving slot (13) communicating with the set of holes (12). The set of actuating head (11) is located in the set of holes (12) and A rotating member (20) in the accommodating groove (13), a ratchet reversing group (30), and a stopper (40) supporting the ratchet reversing group (30) to increase torque output.

The rotating member (20) has a ratcheting convex ring (21) and a limiting flange (23). The ratcheting convex ring (21) is disposed on the outer peripheral side of the rotating member (20) and is located in the set hole (12) ), the limit flange (23) is provided at one end of the ratchet ring (21) and protrudes out of the set hole (12), and the limit flange (23) has a ring provided on the outer periphery The plural card fixing slot (231).

The ratchet reversing group (30) has a dial cover (31) and a fixed cover (32) at the two ends of the set hole (12), and the dial cover (31) and the fixed cover (32) A reversing tooth block (33), a linking member (34) and a coil spring (35), and the two ends of the coil spring (35) bear against the reversing tooth block (33) and the linking member (34) At this time, the reversing tooth block (33) engages with the ratcheting convex ring (21), the dial (31) is sleeved on the rotating member (20) and is located on the side of the ratcheting convex ring (21), the fixed The cover (32) is sleeved on the rotating member (20) and is located between the other side of the ratchet ring (21) and the limiting flange (23), and the dial cover (31) is provided with an extension slot (13) a toggle lever (313), the toggle lever (313) actuates the linking member (34) and drives the reversing tooth block (33) to change the driving direction of engaging the ratchet ring (21).

The stopper (40) is combined with the surface of the fixed cover (32) on the outside of the assembly hole (12) in a concave-convex matching structure, and the stopper (40) is directed from the handle (10) toward the limiting flange (23) Sliding in the direction, and one end of the blocking member (40) is pushed into one of the clamping grooves (231) of the outer periphery of the limiting flange (23) to block the limiting position for supporting the rotating member (20) Large rotational torque output.

As shown in the seventh to tenth figures of the second embodiment above, the linking member (34) has a dial slot (341) facing the dial cover (31), and the dial lever (313) is inserted into the dial slot (341) and The toggle link (34) is deflected, the coil spring (35) is deflected corresponding to the link (34) and pushes the reversing gear block (33) to deflect to change the driving direction of the switch to engage the ratchet ring (21). In addition, the concave-convex matching structure between the stopper (40) and the surface of the fixed cover (32) is shown in the second and third figures. A second sliding groove (321) is provided on the fixed cover (32) and fits The blocking member (40) is provided with a slider (41); and the fixed cover (32) has a second set of holes (322) for the set of rotating members (20), and one end of the second sliding groove (321) Communicating with the second set of holes (322), the slider (41) of the stopper (40) is slidably assembled in the second sliding groove (321) from one end communicating with the second set of holes (322). Accordingly; as shown in the eleventh figure, by sliding the stopper (40) of the second slide slot (321) of the fixed cover (32) from the handle (10) toward the limit flange ( 23) The notch of one of the locking grooves (231) slides, so that one end of the stopper (40) is pushed into one of the locking grooves (231) of the outer periphery of the limiting flange (23) to stop The limit position can also support the rotating member (20) to have a greater rotational torque output.

Moreover, the plurality of clamping grooves (231) of the limiting flange (23) respectively include a straight blocking surface (2311) and two inclined joint surfaces (2312), the two inclined joint surfaces (2312) and the straight blocking surface (2312) 2311) Connect the enlarged notch forming the clamping groove (231), and set the two inner arc angles (2313) to avoid stress concentration between the straight blocking surface (2311) and the two mitered surfaces (2312); The six-sided rectangular body stopper (40) has, at the end facing the limit flange (23), two chamfered corners (43) corresponding to two inner arc angles (2313); Guide the surface (2312) so that the two chamfered angles (42) at one end of the stopper (40) enter the clamping groove (231) along the two inclined joint surfaces (2312) and lean against the two inner arc angles (2313), Moreover, the two inner arc angles (2313) provide abutment of the two chamfered angles (43) at one end of the stopper (40), effectively avoiding the cracks caused by stress concentration, and can improve the durability of the frequent abutment operation .

As described above, the present invention slides the stopper (40) of the dial cover (31) or the fixed cover (32), and the limit plate (22) or limiter is moved from the handle (10) toward the rotating member (20) The structure of the position flange (23) sliding in the direction to block the limit position can indeed break through the difficulties and shortcomings faced by the current technology development of the ratchet wrench to increase the torque, and achieve the following advantages:

1. With the plurality of limiting grooves (221) of the limiting disk (22) or the clamping groove (231) of the limiting flange (23) having a notch larger than the stopper (40), a guide can be formed The function of the stopper (40) entering the limit groove (221) and the clamping groove (231) can effectively improve the smoothness of operation and the convenience of use.

2. Further streamline the structure with fewer components, effectively simplify the assembly of the structure to shorten the cost of working hours, and achieve multiple economic benefits of reducing the cost of spare parts.

The above is only for explaining the preferred embodiments of the present invention, and is not intended to limit the present invention in any form, so that any modifications made to the present invention under the same creative spirit Or the changes, which can be implemented according to other types and have the same effect, should still be included in the scope of protection of the present invention.

In summary, the "ratchet wrench that can increase the torque" of the present invention is indeed fully practical and cost-effective in line with the needs of industrial development, and the structural creation disclosed has an unprecedented innovative structure, so its Having "newness" should undoubtedly be considered, and the present invention can be more effective than the conventional structure, so it also has "progressiveness", which fully complies with the provisions of the Chinese Patent Law on the application requirements of invention patents, and the patent is filed according to law Apply, and I hope that the Bureau will review it as soon as possible and give affirmation.

(100)‧‧‧ wrench

(10)‧‧‧grip

(11)‧‧‧Actual head

(20)‧‧‧rotating parts

(22)‧‧‧Limit plate

(30) ‧‧‧ Ratchet Reversing Group

(31)‧‧‧Dial cover

(40)‧‧‧stop

Claims (4)

A ratchet wrench capable of improving torque includes: a handle and an actuating head at one end of the handle, the actuating head has a set of holes and a receiving groove communicating with the set of holes, and the actuating head group is provided with A rotating member located in the assembly hole and the accommodating groove, a ratchet reversing group, and a stopper supporting the ratchet reversing group to improve torque output; the rotating member has a ratchet protruding ring and a limit The ratchet ring is provided on the outer peripheral side of the rotating member and is located in the set hole, the limit disc is provided at one end of the rotating member and protrudes out of the set hole, and the limit disc has a ring disposed on the outer periphery A plurality of limit slots on the edge; the ratcheting reversing group has a dial cover and a fixed cover at the two ends of the set hole of the group, and a reversing tooth block and a linkage between the dial cover and the fixed cover And a coil spring, and both ends of the coil spring abut between the reversing tooth block and the linking member, the reversing tooth block engages with the ratchet convex ring, the fixed cover sleeve is assembled on the rotating part and is located on the ratchet convex On one side of the ring, the dial cover is set on the rotating part and is located between the other side of the ratchet ring and the limit disc, and the dial cover is provided with a lever extending into the accommodating groove, which is driven by the lever The action of the linking member and the reversing tooth block is used to change the driving direction of engaging the ratcheting convex ring; the stopper is combined with the surface of the dial cover in a concave-convex matching structure in a sliding combination, and the stopper moves from the handle The limit disc slides in the direction, and one end of the stopper pushes into one of the limit grooves of the outer periphery of the limit disc to stop the limit, and is used to support the rotating member to have a greater rotation torque output; the limit disc The plural limit grooves respectively include a straight blocking surface and two mitered surfaces. The two mitered surfaces are connected to the straight blocking surface to form an enlarged slot of the limit groove, and the straight blocking surface and the two mitered surfaces are set as To avoid the two inner arc angles of stress concentration, the stopper is a rectangular body with six faces, and the end of the stopper facing the limit disc has two chamfered angles corresponding to the two inner arc angles. The arc angle enters the limiting groove along the two inclined joint surfaces and abuts against the two inner arc angles. The ratchet wrench capable of increasing torque as described in claim 1, wherein the linking member has a dial slot facing the dial cover, the dial lever is inserted into the dial slot and the linking member is deflected, the coil spring deflects corresponding to the linking member and Pushing the reversing gear block deflects to change the driving direction of switching to engage the ratchet ring. A ratchet wrench capable of improving torque includes: a handle and an actuating head at one end of the handle, the actuating head has a set of holes and a receiving groove communicating with the set of holes, and the actuating head group is provided with a The blocking member and a rotating member and a ratchet reversing group located in the assembly hole and the accommodating groove; the rotating member has a ratchet convex ring and a limiting flange, and the ratchet convex ring is arranged on the outer periphery of the rotating member Side and located in the set hole, the limit flange is provided on one side of the ratchet ring and protrudes out of the set hole, and the limit flange has a plurality of locking grooves set on the outer periphery The ratcheting reversing group has a cover and a fixed cover at both ends of the set hole, and a reversing tooth block, a linking member and a coil spring between the cover and the fixed cover, and The two ends of the coil spring abut between the reversing tooth block and the linking member, the reversing tooth block engages with the ratchet convex ring, the cover is set on the rotating part and is located on one side of the ratchet convex ring, the fixed The cover sleeve is located between the rotating part and between the other side of the ratchet ring and the limit flange, and the dial cover is provided with a lever extending into the accommodating groove. The lever moves the linking member and drives the change To the tooth block, the driving direction of the ratchet ring is changed; the stopper is combined with the surface of the fixed cover in a concave-convex matching structure, and the stopper slides from the handle toward the limit flange. And one end of the stopper is pushed into one of the locking grooves of the outer periphery of the limit flange to stop the limit, and is used to support the rotating member to have a greater rotational torque output; the plurality of locking grooves of the limit flange It includes a straight blocking surface and two inclined joint surfaces, the two inclined joint surfaces and the straight blocking surface are connected to form an enlarged slot of the clamping groove, and the straight blocking surface and the two inclined joint surfaces are set to avoid stress concentration. Inner arc angle, the stopper is a rectangular body with six faces, and the stopper faces one end of the limiting flange There are two chamfered angles corresponding to the two inner arc angles. The two chamfered angles at one end of the stopper enter the clamping groove along the two inclined joint surfaces and abut against the two inner arc angles. The ratchet wrench capable of increasing the torque as described in claim 3, wherein the linking member has a dial slot facing the dial cover, the dial lever is inserted into the dial slot and the linking member is deflected, the coil spring deflects corresponding to the linking member and Pushing the reversing gear block deflects to change the driving direction of switching to engage the ratchet ring.

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