Open ratchet wrench

Abstract

A jaw seat is provided with a main hole with an opening, the main hole is used for pivoting a ratchet wheel with outer teeth on the periphery, and the ratchet wheel is provided with a wrench hole with a channel. A first chamber and a second chamber are concavely arranged on the wall surface of the main hole and are used for mounting a first latch and a second latch which are meshed with the outer teeth under the action of a spring; the utility model is characterized in that the jaw seat is provided with a first hole and a second hole which are communicated with the first chamber and the second chamber and are used for pivoting the first shaft piece and the second shaft piece, the bottoms of the first shaft piece and the second shaft piece are provided with springs, the top ends of the first shaft piece and the second shaft piece are provided with eccentric parts, and the top surface of the jaw seat is provided with a driving plate capable of linking the two eccentric parts, so that the driving plate can be switched between a first gear and a second gear; the ratchet wheel can be conveniently and manually adjusted to apply force in the forward direction or the reverse direction. And secondly, a detachable knob is mounted on the top edge tenon buckle of the periphery of the ratchet wheel, another detachable knob is mounted on the bottom edge tenon buckle, the two knobs limit the ratchet wheel from being separated from the main hole, the ratchet wheel can be linked to rotate in a backlash mode, and the overall cost of mounting the ratchet wheel is made to accord with economic benefits.

Description

Technical Field

[0001] This utility model relates to the field of hand tool technology, and more specifically to an open-end ratchet wrench suitable for disassembling and assembling pipe nuts, particularly an open-end ratchet wrench that allows for convenient bidirectional adjustment of the force direction for reversing operations and has a low installation cost. Background Technology

[0002] Early technologies, such as those described in US Patent 2551669A, still have the following drawbacks to date:

[0003] First, the open-end ratchet wrench adjusts the direction of force application by flipping the wrench up and down. This is necessary when installing pipes, as one end of the nut may require tightening with forward force while the other end requires tightening with reverse force. Similarly, reversing the force application is also necessary when removing the nuts at both ends of the pipe. This requires the open-end ratchet wrench to sequentially disengage from the pipe, flip the wrench, and then reinsert the pipe to accommodate different force requirements, significantly increasing the operator's workload.

[0004] 2. After removing the pipe nut, the ratchet and pipe are often stuck in a position where they cannot disengage. It is necessary to rotate the ratchet freely to engage the ratchet channel with the wrench opening to disengage it from the pipe. Therefore, knobs for free-rotation are required on both the upper and lower parts of the ratchet. Current technology integrates the upper knob into the ratchet and also installs a detachable lower knob. However, the protruding upper knob results in significant processing waste and higher production costs, making this technology uneconomical. Utility Model Content

[0005] The purpose of this invention is to provide an open-end ratchet wrench that allows manual adjustment of the force direction for reversing operations.

[0006] To achieve the above objectives, the present invention provides an open-end ratchet wrench, comprising at least:

[0007] A plate body extends a jaw seat, the jaw seat has a main hole running through it longitudinally, and the jaw seat has an opening communicating with the main hole. The wall of the main hole is further recessed with a first arc surface and a second arc surface to form a first chamber and a second chamber respectively. The top surface of the jaw seat is recessed with a first hole communicating with the first chamber and a second hole communicating with the second chamber.

[0008] A ratchet with a central hole is pivotally mounted in the main hole and has external teeth on its outer circumference. The outer circumference of the ratchet is also provided with a channel connecting the hole and the opening.

[0009] Two knobs: one knob is matched with the top edge of the ratchet and is limited to the top surface of the jaw seat; the other knob is matched with the bottom edge of the ratchet and is limited to the bottom surface of the jaw seat; both knobs prevent the ratchet from disengaging from the main hole and can also drive the ratchet to rotate.

[0010] Two levers, one installed in the first chamber is the first lever, and the other installed in the second chamber is the second lever; both levers have lever teeth on the front that can engage external teeth, and coupling areas on the back for spring action, and the lever teeth have a tendency to engage external teeth at any time.

[0011] Two shafts, the first shaft is pivotally connected to the first hole and the second shaft is pivotally connected to the second hole; springs are installed at the bottom of both shafts, so that the spring pushing action corresponds to the coupling area; the top of both shafts is provided with an eccentric part;

[0012] A dial mounted on the top surface of the jaw seat can be switched between the first and second gears. It has a first rail that can actuate the eccentric part of the first shaft and a second rail that can actuate the eccentric part of the second shaft. When the dial is in the first gear, the first and second rails can synchronously drive the two shafts to rotate by an angle. The two levers are respectively locked in the reverse position of the corresponding first or second arc surface, so that the lever body drives the lever hole to apply force in the forward direction. When the dial is switched to the second gear, the two levers are reversed and locked in the forward position of the corresponding first or second arc surface, so that the lever body drives the lever hole to apply force in the reverse direction.

[0013] Furthermore, the dial can switch between gear 1, neutral, and gear 2. When the dial is in neutral, the two levers do not contact the corresponding first and second arc surfaces.

[0014] Furthermore, the dial is additionally marked, and the lever body is provided with markings that match the marks. The marks and markings are used to identify the first gear and the second gear.

[0015] Furthermore, the dial is slidably mounted between the upper knob and the top surface of the jaw seat, and has a support portion that rests on the outer periphery of the ratchet.

[0016] Furthermore, the bottom of the two shafts is radially recessed with guide holes for inserting springs, and a top stop is slidably fitted between the springs and the coupling area.

[0017] Furthermore, the left edge of the back of the two levers has a left abutment surface that converges and connects to the left end of the front of the lever tooth, and the right edge has a right abutment surface that converges and connects to the right end of the front of the lever tooth. A coupling area is recessed between the left abutment surface and the right abutment surface. When the dial is switched to the first gear, the right abutment surfaces of the two levers are respectively locked in the reverse position of the corresponding first arc surface or second arc surface. When the dial is switched to the second gear, the left abutment surfaces of the two levers are respectively locked in the forward position of the corresponding first arc surface or second arc surface.

[0018] Furthermore, the ratchet has a top groove on its outer periphery top edge ring and an upper tenon groove that intersects and communicates with the top groove; the ratchet has a bottom groove on its outer periphery bottom edge ring and a lower tenon groove that intersects and communicates with the bottom groove; one knob is installed in the top groove and the upper tenon groove, and another knob is installed in the bottom groove and the lower tenon groove.

[0019] Furthermore, the main hole wall is provided with at least one inner ring groove, which connects the first chamber and the second chamber; the front of the two levers is provided with matching positioning grooves at the corresponding positions of the inner ring grooves, and C-type fasteners are installed in the positioning grooves, the inner diameter of the C-type fasteners being larger than the outer diameter of the ratchet.

[0020] By adopting the above solution, this utility model can eliminate the complicated operations required by the previous technology, such as disconnecting the pipe, flipping the wrench, and then inserting the pipe, making it more convenient for users to perform reversing operations.

[0021] This utility model also provides another open-end ratchet wrench with lower installation cost, comprising at least:

[0022] A plate body extends a jaw seat, the jaw seat has a main hole running through it longitudinally, and the jaw seat has an opening communicating with the main hole; the wall of the main hole is further recessed with a first arc surface and a second arc surface to form a first chamber and a second chamber respectively.

[0023] A ratchet with a central through-hole is pivotally mounted in the main hole and has external teeth on its outer circumference. The ratchet also has a channel on its outer circumference that connects the through-hole and the opening. The top edge of the ratchet's outer circumference has a top groove and an upper tenon groove that intersects with the top groove. The bottom edge of the ratchet's outer circumference has a bottom groove and a lower tenon groove that intersects with the bottom groove.

[0024] Two knobs: one knob matches the top groove and upper tenon groove and is located on the top surface of the jaw seat; the other knob matches the bottom groove and lower tenon groove and is located on the bottom surface of the jaw seat. The two knobs prevent the ratchet from disengaging from the main hole and can be linked to the ratchet to rotate through the upper and lower tenon grooves.

[0025] Two levers are installed in the first chamber as the first lever and in the second chamber as the second lever. Both levers have lever teeth on the front that can engage external teeth, and a coupling area on the back for a spring to act. The lever teeth have a tendency to engage external teeth at any time, so that the lever body drives the lever hole to apply force in the forward or reverse direction.

[0026] Furthermore, the inner periphery of the two knobs is provided with latches for engaging the top or bottom grooves, and a stepped drop surface is formed on the outer periphery of the connecting latches. The drop surface abuts against the outer periphery of the ratchet. Tenons extend from the latches and drop surfaces of the two knobs, and the tenons match the upper or lower tenon groove.

[0027] By adopting the above solution, this utility model has a detachable knob installed on the top edge of the outer periphery of the ratchet and another detachable knob installed on the bottom edge, so that the two knobs and the ratchet can be engaged and disengaged by a tenon-and-mortise structure. Therefore, the two knobs can be manufactured in the same manner, and the configuration of the top groove, upper tenon groove, bottom groove and lower tenon groove of the ratchet can effectively save ratchet processing waste. Therefore, the overall installation cost of the ratchet of this utility model is easy to control, and thus it is more economical than the previous technology. Attached Figure Description

[0028] Figure 1 This is an exploded view of the present invention.

[0029] Figure 2 yes Figure 1 Enlarged schematic diagram of a portion of the knob.

[0030] Figure 3 yes Figure 1 Schematic diagram of partial combination.

[0031] Figure 4 yes Figure 1 Combined appearance diagram.

[0032] Figure 5 This is a top view of the utility model in the unused position.

[0033] Figure 6 yes Figure 5 Schematic diagram of the cross-section at location AA.

[0034] Figure 7 yes Figure 6 Schematic diagram of the cross-section at BB location.

[0035] Figure 8 This is a diagram showing the location of the main components of this utility model in the first stage (a).

[0036] Figure 9 This is a diagram showing the location of the main components of this utility model in the first stage (II).

[0037] Figure 10 This is a diagram showing the location of the main components in the second stage of this utility model (I).

[0038] Figure 11 This is a diagram showing the location of the main components in the second stage of this utility model (II).

[0039] Explanation of icon numbers:

[0040] 1. Baffle body; 11. Jaw seat; 12. Main hole; 13. Opening; 14. First arc surface; 140. First chamber; 15. Second arc surface; 150. Second chamber; 16. First hole; 17. Second hole; 18. First inner ring groove; 19. Second inner ring groove; 2. Ratchet; 21. Baffle hole; 22. External tooth; 23. Channel; 24. Top groove; 25. Upper tenon groove; 26. Bottom groove; 27. Lower tenon groove; 31. First knob; 32. Second knob; 33. Tongue; 34. Drop surface; 35. Tenon Block; 41 First stop; 42 Second stop; 43 Stop tooth; 441 First positioning groove; 442 Second positioning groove; 451 First C-type fastener; 452 Second C-type fastener; 46 Left abutment surface; 47 Right abutment surface; 48 Coupling area; 49 Spring; 51 First shaft; 52 Second shaft; 53 Guide hole; 54 Top stop; 55 Eccentric part; 6 Dial; 61 First rail; 62 Second rail; 63 Mark; 64 Support; 65 Mark. Detailed Implementation

[0041] Please refer to Figures 1 to 11 This utility model includes at least:

[0042] A jaw body 1 extends forward with a jaw seat 11. The jaw seat 11 has a main hole 12 extending longitudinally through it, and an opening 13 at its front end communicating with the main hole 12, so that the inner circumference of the main hole 12 is C-shaped. The wall of the main hole 12 has a first arc surface 14 and a second arc surface 15 recessed radially along the main hole 12 at a position away from the opening 13, so that the first arc surface 14 forms a first chamber 140 between the main hole 12 and the second arc surface 15 forms a second chamber 150 between the main hole 12 and the main hole 12. The top surface of the jaw seat 11 also has a first hole 16 recessed downward to communicate with the first chamber 140, and a second hole 17 recessed downward to communicate with the second chamber 150. The wall of the aforementioned main hole 12 is further recessed with two inner ring grooves (a first inner ring groove 18 and a second inner ring groove 19), which control the first inner ring groove 18 to communicate with the upper edge of the first chamber 140 and the second chamber 150, and the second inner ring groove 19 to communicate with the lower edge of the first chamber 140 and the second chamber 150.

[0043] A ratchet 2 has a hexagonal wrench hole 21 running longitudinally through its center. The wrench hole 21 can be used to engage with a nut located on a pipe to tighten or loosen the nut. The ratchet 2 is pivotally mounted in a main hole 12 and can rotate coaxially within the main hole 12. The ratchet 2 has external teeth 22 with a certain number of teeth on its outer circumference, and a channel 23 is radially cut on its outer circumference, connecting the inside and outside of the wrench hole 21. Therefore, the outer circumference of the ratchet 2 is C-shaped, allowing the channel 23 to connect the wrench hole 21 and the opening 13, serving as the pipe's inlet and outlet through the wrench hole 21. The wrench hole 21 allows for subsequent tightening or loosening of nuts on the pipeline; the ratchet 2 has a top groove 24 on its outer periphery top edge ring, and an upper tenon groove 25 that intersects with the top groove 24 at the position opposite to the channel 23 on the outer periphery top edge of the ratchet 2. The upper tenon groove 25 is milled downward from the top of the ratchet 2; the ratchet 2 has a bottom groove 26 on its outer periphery bottom edge ring, and a lower tenon groove 27 that intersects with the bottom groove 26 at the position opposite to the channel 23 on the outer periphery bottom edge of the ratchet 2. The lower tenon groove 27 is milled upward from the bottom of the ratchet 2;

[0044] Please use the two C-shaped knobs (knob 31 and knob 32) in conjunction. Figure 2 Upon inspection, the first knob 31 and the second knob 32 have latches 33 on their inner periphery that can engage with the top groove 24 or the bottom groove 26, and a stepped drop surface 34 is formed on the outer periphery of the latches 33, allowing the drop surface 34 to abut against the outer periphery of the ratchet 2. Furthermore, the first knob 31 and the second knob 32 have tenons 35 extending from the latches 33 and the drop surface 34, which match the upper tenon 25 or the lower tenon 27; thus, the latches 33 of the first knob 31... The tenon 35 is respectively installed in the top groove 24 and the upper mortise 25, and the first knob 31 is limited to the top surface of the jaw seat 11. The latch 33 of the second knob 32 and the tenon 35 are respectively installed in the bottom groove 26 and the lower mortise 27, and the second knob 32 is limited to the bottom surface of the jaw seat 11, so that the first knob 31 and the second knob 32 are sufficient to prevent the ratchet 2 from disengaging from the main hole 12; furthermore, the tenon 35 of the first knob 31 and the second knob 32 can move the upper mortise 2 together. 5. The lower tenon 27 allows the ratchet 2 to rotate freely, enabling the user to easily select either the first knob 31 or the second knob 32 to rotate, thereby controlling the alignment and connection between the channel 23 and the opening 13. This allows the pipe to smoothly disengage from the wrench hole 21 after the nut on the pipe is tightened or loosened. Since the first knob 31, the second knob 32, and the ratchet 2 are engaged and disengaged using a tenon-and-mortise structure, the first knob 31 and the second knob 32 can be manufactured uniformly. Furthermore, the configuration of the top groove 24, upper tenon 25, bottom groove 26, and lower tenon 27 of the ratchet 2 effectively saves on processing waste. Therefore, the overall installation cost of the ratchet 2 of this utility model is easy to control, making it more economical than previous technologies. In addition, the first knob 31 and the second knob 32 abut against the outer periphery of the ratchet 2 with a large area of ​​the drop surface 34, making the rotation of the ratchet 2 more stable.

[0045] Two chucks (first chuck 41 and second chuck 42) are provided, with the first chuck 41 installed in the first chamber 140 and the second chuck 42 installed in the second chamber 150. The first chuck 41 and the second chuck 42 have chuck teeth 43 on their front sides that can engage with the external teeth 22. They also have positioning grooves (first positioning groove 441 and second positioning groove 442) on their front sides that match two inner ring grooves (first inner ring groove 18 and second inner ring groove 19), for corresponding installation of two C-type fasteners (first C-type fastener 451 and second C-type fastener 452). This prevents the first chuck 41 from disengaging from the first chamber 140 and the second chuck 42 from disengaging from the second chamber 150. The inner diameter of the first C-type fastener 451 and the second C-type fastener 452 is larger than the outer diameter of the ratchet 2, ensuring that the first C-type fastener 451 and the second C-type fastener 452 do not interfere with each other. The ratchet 2 is installed into the main hole 12; the left end edge of the back of the first tug 41 and the second tug 42 has a left abutment surface 46 that connects to the left end of the tug tooth 43, and the right end edge has a right abutment surface 47 that connects to the right end of the tug tooth 43. Furthermore, a coupling area 48 is recessed between the left abutment surface 46 and the right abutment surface 47. The coupling area 48 is for a spring 49 to act, so that the spring 49 can provide preload to the corresponding first tug 41 or second tug 42, so that the first tug 41 and the second tug 42 have the tendency to position the first C-type fastener 451 and the second C-type fastener 452 at any time, and have the tendency to engage the external teeth 22 at any time. It also controls the left abutment surface 46 and the right abutment surface 47 to keep from contacting the matching first arc surface 14 or the second arc surface 15 at the same time, so that the first tug 41 and the second tug 42 have the margin for forward or reverse displacement.

[0046] Two shafts (first shaft 51 and second shaft 52) ​​are pivotally connected to the first hole 16 as the first shaft 51 and to the second hole 17 as the second shaft 52. The bottom of the first shaft 51 and the second shaft 52 are radially recessed with guide holes 53, which are for inserting the aforementioned spring 49. A bullet-shaped top stop 54 is slidably fitted between the spring 49 and the coupling area 48, so that the top stop 54 can move linearly in and out along the guide hole 53. The spring 49 pushes the top stop 54 to indirectly act on the back of the corresponding first stop 41 or second stop 42, which can improve the flexibility problem of the spring 49 directly acting on the coupling area 48. The top of the first shaft 51 and the second shaft 52 are further provided with an eccentric part 55 protruding from the top surface of the jaw seat 11.

[0047] A dial 6 is slidably mounted between the upper first knob 31 and the top surface of the jaw seat 11, allowing it to switch between the first and second gears. It has a first rail 61 that can actuate the eccentric portion 55 of the first shaft 51, a second rail 62 that can actuate the eccentric portion 55 of the second shaft 52, a mark 63 located between the first rail 61 and the second rail 62, and a C-shaped support 64 corresponding to the outer periphery of the C-shaped ratchet 2.

[0048] Figures 5 to 7 This reveals the positions of the main components when the dial 6 is in the neutral position; this neutral position is relatively centered between the first and second gears. At this time, the first rail 61 and the second rail 62 are connected to the first lever 41 and the second lever 42 through the first shaft 51 and the second shaft 52, keeping the first lever 41 and the second lever 42 centered in the first chamber 140 and the second chamber 150, respectively, so that the left abutment surface 46 and the right abutment surface 47 of the first lever 41 and the second lever 42 are in the center. The first arc surface 14 and the second arc surface 15 are kept out of contact, so that the lever body 1 cannot drive the lever hole 21 to apply force in the forward or reverse direction to tighten or loosen the nut. This allows the first knob 31 and the second knob 32 to drive the ratchet 2 to rotate freely in the forward or reverse direction, so as to control the channel 23 to connect to the opening 13. When the dial 6 is in the neutral position, the mark 63 is located in the center of the lever body 1. In order to improve the visual identification of the neutral position, a mark 65 aligned with the mark 63 can be provided on the lever body 1.

[0049] The relative displacement between mark 63 and mark 65 can also be used to indicate whether the current dial 6 is in position 1 or position 2.

[0050] like Figures 8 to 9 As shown, when the user pushes the dial 6 to a position where it can no longer move, mark 63 will remain in the forward position of mark 65, indicating that the dial 6 has switched to the first gear. At this time, the first rail 61 and the second rail 62 will move together with the two eccentric parts 55, which in turn will cause the first shaft 51 and the second shaft 52 to rotate in the forward direction by an angle, causing the two top stops 54 to push the first stop 41 and the second stop 42 to change the position of the coupling area 48, thereby controlling the first stop 41 and the second stop 42. The lever 42 moves in the opposite direction in the matching first chamber 140 and second chamber 150, causing the right abutment 47 to lock in the opposite position of the corresponding first arc surface 14 or second arc surface 15, so that the lever body 1 drives the lever hole 21 to tighten the nut in the forward direction; when the present invention wants to disengage the pipeline from the tightened nut, it can directly reverse the flow through the lever body 1, and when the channel 23 connects to the opening 13, operate the lever hole 21 to disengage the nut, and then let the pipeline disengage from the lever hole 21 along the channel 23 and the opening 13;

[0051] like Figures 10 to 11As shown, when the user pushes the dial 6 to a position where it can no longer move, mark 63 will remain at the reverse position of mark 65, indicating that the dial 6 has switched to the second gear. This causes the first rail 61 and the second rail 62 to rotate the first shaft 51 and the second shaft 52 in the opposite direction to a fixed point, simultaneously changing the position of the two top levers 54 in the coupling area 48 of the first lever 41 and the second lever 42, thereby controlling the first lever 41 and the second lever 42 in the matching first chamber 140 and the second chamber 142. The forward displacement of the second chamber 150 transforms the left abutment surface 46 into a forward position where it is locked onto the corresponding first arc surface 14 or second arc surface 15, causing the wrench body 1 to drive the ratchet 2 to loosen the nut through the wrench hole 21 in the reverse direction. When this utility model wants to detach from the pipeline with the loosened nut, it is necessary to operate the wrench hole 21 to detach from the nut, and then use either the first knob 31 or the second knob 32 to drive the ratchet 2 to rotate freely in the forward direction. When the channel 23 connects to the opening 13, the pipeline can be detached from the wrench hole 21.

[0052] The above is only a preferred embodiment of the present utility model and should not be construed as limiting the scope of the present utility model. All equivalent changes and modifications made in accordance with the claims of the present utility model shall be considered as part of the present utility model.

Claims

1. An open ratchet wrench characterized by, At least comprising: A handle, which extends with a jaw seat, the jaw seat is longitudinally through with a main hole, and the jaw seat is cross-sectioned with an opening which communicates with the main hole, and the wall surface of the main hole is concavely provided with a first arc surface and a second arc surface, so as to correspondingly form a first chamber and a second chamber; the top surface of the jaw seat is concavely provided with a first hole which communicates with the first chamber and a second hole which communicates with the second chamber; A ratchet wheel which is through with a handle hole, and is pivotally arranged in the main hole and is provided with external teeth on the outer periphery of the ratchet wheel, and the outer periphery of the ratchet wheel is cross-sectioned with a channel which communicates with the handle hole and the opening; Two knobs, one knob is matched with the top edge of the ratchet wheel and is limited on the top surface of the jaw seat, and the other knob is matched with the bottom edge of the ratchet wheel and is limited on the bottom surface of the jaw seat; the two knobs limit the ratchet wheel from escaping from the main hole, and can drive the ratchet wheel to rotate; Two detents, one detent is installed in the first chamber and is called a first detent, and the other detent is installed in the second chamber and is called a second detent; the front surface of each detent is provided with a detent tooth which can engage with the external teeth, and the back surface of each detent is provided with a coupling area which is acted on by a spring; the detent tooth has a tendency to engage with the external teeth at any time; Two shafts, one shaft is pivotally connected to the first hole and is called a first shaft, and the other shaft is pivotally connected to the second hole and is called a second shaft; the bottom of each shaft is provided with a spring, so that the spring pushes the corresponding coupling area; the top end of each shaft is further provided with an eccentric part; A dial plate which is installed on the top surface of the jaw seat, and can be switched between a first gear and a second gear, and has a first track which can drive the eccentric part of the first shaft and a second track which can drive the eccentric part of the second shaft; when the dial plate is in the first gear, the first track and the second track can simultaneously drive the two shafts to rotate by an angle, and the two detents are respectively locked in the reverse position of the corresponding first arc surface or second arc surface, so that the handle drives the handle hole to apply force in the forward direction; when the dial plate is switched to the second gear, the two detents are respectively locked in the forward position of the corresponding first arc surface or second arc surface, so that the handle drives the handle hole to apply force in the reverse direction.

2. The open ratchet wrench of claim 1, wherein The dial plate can be further switched between the first gear, a neutral gear and the second gear; when the dial plate is in the neutral gear, the two detents do not contact the corresponding first arc surface and second arc surface.

3. The open ratchet wrench of claim 1 wherein, The dial plate is further provided with a mark, and the handle is provided with a label which is matched with the mark; the mark and the label are used to identify the first gear and the second gear.

4. The open ratchet wrench according to claim 1 or 2 or 3, wherein The dial plate is slidably installed between the upper knob and the top surface of the jaw seat, and has a supporting part which relies on the outer periphery of the ratchet wheel.

5. The open ratchet wrench of claim 1 or 2 or 3, wherein, The bottom of each shaft is radially concavely provided with a guide hole, the guide hole is used to insert the spring, and a top pressing piece is slidably arranged between the spring and the coupling area.

6. The open ratchet wrench of claim 1 or 2 or 3, wherein, The left end edge of the back surface of each detent has a left abutting surface which converges with the left end of the front surface of the detent tooth, and the right end edge has a right abutting surface which converges with the right end of the front surface of the detent tooth; the coupling area is concavely provided between the left abutting surface and the right abutting surface; when the dial plate is switched to the first gear, the right abutting surface of each detent is respectively locked in the reverse position of the corresponding first arc surface or second arc surface; when the dial plate is switched to the second gear, the left abutting surface of each detent is respectively locked in the forward position of the corresponding first arc surface or second arc surface.

7. The open ratchet wrench of claim 1 or 2 or 3, wherein, The top edge of the outer periphery of the ratchet wheel is annularly provided with a top groove, and is further provided with an upper tenon groove which communicates with the top groove; the bottom edge of the outer periphery of the ratchet wheel is annularly provided with a bottom groove, and is further provided with a lower tenon groove which communicates with the bottom groove; one knob is installed on the top groove and the upper tenon groove, and the other knob is installed on the bottom groove and the lower tenon groove.

8. The open ratchet wrench of claim 1 or 2 or 3, wherein, The main hole wall surface is provided with at least one inner ring groove, which is communicated with the first chamber and the second chamber; the front surface of the two catches is provided with a matching positioning groove at the position corresponding to the inner ring groove, and a C-shaped fastener is installed in the positioning groove, and the inner hole diameter of the C-shaped fastener is larger than the outer diameter of the ratchet.

9. An open ratchet wrench characterized by At least comprising: A handle body extending with a jaw seat, the jaw seat is longitudinally penetrated with a main hole, and the jaw seat is cross-sectionally provided with an opening communicated with the main hole; the main hole wall surface is further concavely provided with a first arc surface and a second arc surface, so as to correspondingly form a first chamber and a second chamber; A ratchet penetrated with a handle hole, the ratchet is pivoted in the main hole and is provided with external teeth on the outer periphery, and the ratchet outer periphery is cross-sectionally provided with a channel communicated with the handle hole and the opening; the ratchet outer periphery top edge is annularly provided with a top groove, and is further provided with an upper tenon groove communicated with the top groove; the ratchet outer periphery bottom edge is annularly provided with a bottom groove, and is further provided with a lower tenon groove communicated with the bottom groove; Two knobs, one knob is matched with the top groove and the upper tenon groove and is limited on the top surface of the jaw seat; the other knob is matched with the bottom groove and the lower tenon groove and is limited on the bottom surface of the jaw seat; the two knobs limit the ratchet from escaping from the main hole, and can drive the ratchet to rotate by cooperating with the upper tenon groove and the lower tenon groove; Two catches, the first catch is installed in the first chamber, and the second catch is installed in the second chamber; the front surface of the two catches is provided with catch teeth capable of engaging the external teeth, and the back surface is provided with a coupling area for a spring; the catch teeth have a tendency to engage the external teeth at any time, so that the handle body drives the handle hole to apply force in the same direction or in the opposite direction.

10. The open ratchet wrench of claim 9, wherein, The inner periphery of the two knobs is provided with a card tongue for buckling into the top groove or the bottom groove, and a stepped difference surface is formed on the outer periphery of the card tongue; the difference surface abuts against the outer periphery of the ratchet; the two knobs extend with tenon blocks at the card tongue and the difference surface, and the tenon blocks are matched with the upper tenon groove or the lower tenon groove.

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