TWI543850B - Rotating direction switching mechanism - Google Patents

Description

Positive and negative switching mechanism

The invention relates to the technical field of pneumatic tools, in particular to a positive and negative switching mechanism for controlling the forward and reverse operation of a pneumatic tool.

With the high modernization of society, many traditional fortifications have been largely completed with the aid of modern new tools, such as assembling furniture and repairing hydropower. These modern new tools can be mainly divided into electric tools and air tools, and common pneumatic tools such as pneumatic drill machines, air wrenches, pneumatic screwdrivers (pneumatic) Screwdriver), air impact wrench, etc.

Please refer to the first figure, which is a perspective view of a conventional pneumatic wrench; and, please refer to the second and third figures at the same time, which is a three-dimensional combination diagram of the cylinder housing, the grip and the trigger module of the pneumatic wrench. Explosion map. As shown, the conventional pneumatic wrench 1' includes a rear housing 11', a front housing 12', a grip 13', a trigger module 14', and a power take-off shaft 15'. Wherein, the rear housing 11' houses a pneumatic motor module (not shown), and the grip The bottom of the 13' is connected to a pneumatic source (not shown); thus, when the user presses the trigger module 14', the pneumatic source inputs a driving gas 31 via the grip 13' to control the air motor. The module is running.

As shown in the second and third figures, a setting space 16' for setting the trigger module 14' is formed between the grip 13' and the rear housing 11', and the installation space 16' is connected. A positive air inlet passage (not shown) and a reverse air passage (not shown) inside the rear casing 11'. The trigger module 14' includes a valve sleeve 141', a control rod 142', an intake valve 143', a pressing member 144', and a switching member 145'. The lever 142' is coupled to the pressing member 144' through the intake valve 143', and the intake valve 143' is housed in the valve sleeve 141'. In the design of the air wrench 1', the valve sleeve 141' is provided with a positive air vent 1411' corresponding to the positive air inlet passage and a reverse air vent 1412' corresponding to the reverse air passage.

According to the above description, the intake valve 143' is also provided with a positive air inlet 211' and a reverse air inlet 212'; thus, an intake valve connection portion 1451' of the switching member 145' is coupled to the intake air. A switching member connecting portion 1433' of the valve 143' is such that the user can switch the switching member 145' to drive the intake valve 143' to rotate an angle, thereby making the positive air inlet 211 of the intake valve 143' 'The forward-rotating air hole 1411' communicates with the valve sleeve 141'; thus, when the user successively presses the pressing member 144', the grip 13' input by the grip 13' passes through the intake valve 143'. The air inlet 211' and the forward air vent 1411' of the valve sleeve 141' enter the cylinder of the air motor module to drive the air The air motor in the cylinder rotates in the forward direction; conversely, if the user switches the switching member 145', the reverse air inlet 212' of the intake valve 143' communicates with the reverse air hole 1412' of the valve sleeve 141'; When the pressing member 144' is pressed successively, the grip 13' input by the grip 13' enters the pneumatic via the reverse air hole 212' of the intake valve 143' and the reverse air hole 1412' of the valve sleeve 141'. Among the cylinders of the motor module, the air motor in the driving cylinder is reversely rotated.

For the aforementioned pneumatic wrench 1', since the valve sleeve 141', the control rod 142', the intake valve 143', the pressing member 144', and the switching member 145' are integrated into the trigger module 14' Therefore, it has the advantage of structural integration; however, in practical operation, the pneumatic wrench 1' exhibits the following disadvantages: when the user grips the grip 13' and simultaneously presses the pressing member with a finger (for example, an index finger) At 144', the user's index finger may hit or resist the switching member disposed between the pressing member 144', the grip 13' and the rear housing 11' during the pressing of the pressing member 144'. 145 ′, causing the micro-rotation of the intake valve 143 ′, thereby causing insufficient flow of the driving gas 31 into the air motor module, and failing to operate the air motor module in a high-efficiency area.

Through the above, it can be known that the conventional pneumatic wrench 1' is still insufficient in the design of the forward/reverse mechanism; in view of this, the inventor of the present invention vigorously studied the invention and finally developed a positive reversal of the present invention. Switching mechanism and There is a pneumatic tool for the forward and reverse switching mechanism.

The main object of the present invention is to provide a forward and reverse switching mechanism, which is mainly composed of a control rod and a fixing and retracting module, and the forward and reverse switching mechanism is separately connected to the plate unit of the pneumatic tool. It is disposed in two different setting slots on the air tool housing; in this way, when the user presses the plate unit with his finger (for example, the index finger), the user's index finger can be effectively avoided in the process of pressing the plate unit. The forward or reverse switching mechanism is struck or triggered, thereby ensuring that the pneumatic tool is stably operated in the forward running mode (or the reverse running mode).

Therefore, in order to achieve the main object of the present invention, the inventor of the present invention proposes a forward/reverse switching mechanism disposed between a casing and a grip of a pneumatic tool, wherein the pneumatic tool has a pneumatic body in the casing. The motor module; the forward/reverse switching mechanism includes at least: a control rod having a switching trigger member coupled to the front end thereof; and a fixing and retracting module disposed inside the switching trigger member. Pressing the switching trigger member can push the control rod to move in the housing, and a fixing component of the fixing and retracting module can be fixed by pressing against the switching trigger member, thereby moving the device The control rod is fixed at an end position for shielding a first air inlet hole and/or a second air inlet hole of the air motor module through a plurality of blocking members of the control rod, thereby The pneumatic tool is switched to a forward rotation mode (or a reverse rotation mode); and pressing one of the fixing and retracting module retracting components can release the abutting relationship between the fixing component and the switching triggering component, thereby releasing the control lever, so that the control lever replies To an initial position, the pneumatic tool is again switched to the reverse mode (or the forward mode).

<present invention>

1‧‧‧ pneumatic tools

11‧‧‧Shell

12‧‧‧Air motor module

13‧‧‧Power output shaft

14‧‧‧ grip

15‧‧‧ board unit

16‧‧‧ Forward and reverse switching mechanism

17‧‧‧ valve module

11a‧‧‧ front housing

11b‧‧‧ rear housing

111‧‧‧ accommodating space

131‧‧‧Tool connection

112‧‧‧ Output shaft perforation

121‧‧‧ cylinder

122‧‧‧ airtight parts

123‧‧‧Rotor

124‧‧‧ blades

125‧‧‧ front panel

126‧‧‧back-end board

19‧‧‧Fixed parts

127‧‧‧Pre-Peilin

128‧‧‧post Palin

1211‧‧‧Installation slot

121a‧‧‧First positive vent

122a‧‧‧First reversed vent

121b‧‧‧Second positive vent

122b‧‧‧Second reverse vent

1232‧‧‧Rotary axis

1231‧‧‧ fitting slot

1251‧‧‧ front axle hole

1261‧‧‧ rear axle hole

1262‧‧‧post Palin setting slot

1212‧‧‧ first through hole

1253‧‧‧second through hole

1263‧‧‧Through hole

114‧‧‧First air inlet channel

115‧‧‧Second air inlet

3‧‧‧ driving gas source

141‧‧‧ gas input channel

171‧‧‧ Valve

172‧‧‧ valve stem

173‧‧‧ coil spring

142‧‧‧First setting slot

31‧‧‧ driving gas

143‧‧‧Second setting slot

162‧‧‧Control lever

163‧‧‧Switch trigger

164‧‧‧Fixed components

165‧‧‧Return component

161‧‧‧ gas valve seat

1616‧‧‧容筒

1611‧‧‧First air vent

121C‧‧‧First air inlet through hole

1612‧‧‧Second air inlet

122C‧‧‧Second air inlet hole

1614‧‧‧ inlet

1615‧‧‧Inlet

160‧‧‧First elastic element

1601‧‧‧Spring fasteners

1621‧‧‧ main pole

1624‧‧‧First stop

1625‧‧‧second stop

1622‧‧‧First connection

1623‧‧‧second connection

1641‧‧‧Second elastic element

1643‧‧‧After the top piece

1642‧‧‧Spring fasteners

1631‧‧‧Without holes

1617‧‧‧Chute

1618‧‧‧Fixed holes

144‧‧‧The third setting slot

1651‧‧‧ Pressing Department

1652‧‧‧Top Back

1632‧‧‧ Pressing head

1654‧‧‧ Pressing head

146‧‧‧Exhaust passage

<知知>

1'‧‧‧Air Impact Wrench

11'‧‧‧ Rear housing

12'‧‧‧ front casing

13’‧‧‧ grip

14'‧‧‧ board machine module

15'‧‧‧Power Output Shaft

16’‧‧‧Set space

141’‧‧‧ valve sleeve

142’‧‧‧Control lever

143’‧‧‧Intake valve

144’‧‧‧Pressing parts

145’‧‧‧Switching parts

211’‧‧‧Into the air hole

212'‧‧‧ reverse vent

1411’‧‧‧ venting holes

1412’‧‧‧Reversal of stomata

1433'‧‧‧Switching parts connection

1451'‧‧‧ Intake valve connection

The first figure is a perspective view of a conventional pneumatic wrench; the second figure is a three-dimensional combination of the cylinder housing, the grip, the trigger module, and the forward/reverse switching module of the pneumatic wrench; The cylinder housing of the wrench, the grip, the trigger module, and the exploded view of the forward/reverse switching module; the fourth drawing is a side cross-sectional view of the pneumatic tool having the forward and reverse switching mechanism of the present invention; An exploded view of the rear housing, the handle and the forward/reverse switching mechanism; the sixth diagram is an exploded view of the air motor module; the seventh diagram is an exploded view of the forward and reverse switching mechanism; and the eighth diagram is the forward and reverse switching mechanism Explosion diagram; ninth to ninth C diagrams are diagrams of the pneumatic tools; the tenth and tenth diagrams are diagrams of the air motor module; the eleventh and eleventh diagrams are pneumatic Actuation diagram of the tool; Figure 12 is a cross-sectional view of the forward and reverse switching mechanism; Figures 13A and 13B are diagrams of the air motor module; Figure 14 is a cross-sectional view of the forward and reverse switching mechanism; and fifteenth The figure is a cross-sectional view of the positive and negative switching mechanism.

In order to more clearly describe a forward and reverse switching mechanism proposed by the present invention, a preferred embodiment of the present invention will be described in detail below with reference to the drawings.

Referring to the fourth figure, there is shown a side cross-sectional view of a pneumatic tool having the forward and reverse switching mechanism of the present invention. As shown in the fourth figure, the pneumatic tool 1 includes a housing 11, a pneumatic motor module 12, a power output shaft 13, a grip 14, a plate assembly 15, a forward and reverse switching mechanism 16, And a valve module 17; wherein the housing 11 includes a front housing 11a and a rear housing 11b.

Continue to refer to the fourth figure, and also refer to the fifth figure, which is an exploded view of the rear housing, the handle and the forward and reverse switching mechanism. As shown in the fourth and fifth figures, the air motor module 12 is housed in a receiving space 111 of the rear housing 11b, and the power output shaft 13 is received in the front housing 11a and connected. The air motor module 12; and one of the power output shaft sets 13 is threaded out of the output shaft hole 112 of the front housing 11a for mounting a work tool, such as a screw lock. Pay tools, Wrench, die-cutting pen, engraving tool, sanding tool, angle grinder tool, polishing tool, drill tool, or ratchet wrench.

Continue to refer to the fourth and fifth figures, and also refer to the sixth figure, which is an exploded view of the air motor module. As shown, the air motor module 12 housed in the rear housing 11b includes a cylinder 121, a gas seal 122, a rotor 123, a plurality of blades 124, a front end plate 125, and a rear end plate 126. A front lining 127 and a rear lining 128; wherein the outer side of the cylinder 121 is provided with a mounting groove 1211, and a first forward venting hole 121a and a first reverse venting hole 122a are formed in the mounting groove 1211. The airtight member 122 is mounted in the mounting groove 1211, and has a second forward vent hole 121b corresponding to one of the first forward vent holes 121a and a second reverse vent hole 122b corresponding to the first reverse vent hole 122a; The first forward vent hole 121a and the second forward vent hole 121b constitute a first air inlet hole of the air motor module 12; oppositely, the first reverse air hole 122a and the second reverse air hole 122b constitute A second air inlet through hole of the air motor module 12.

According to the above description, the rotor 123 is housed in the cylinder 121 and has a rotating shaft 1232 extending through the body thereof. Further, the outer side of the rotor 123 is further formed with a plurality of fitting grooves 1231, so that the plurality of blades 124 They are respectively embedded in a plurality of fitting grooves 1231. In addition, the front end plate 125 is coupled to a front cylinder port of the cylinder 121, and an inner surface thereof is provided with a front axle hole 1251 for inserting one end of the rotating shaft 1232; further, the front end plate 125 The outer surface is further provided with a front Paling groove corresponding to the front axle hole 1251 (not shown due to the problem of the plane angle). With respect to the front end plate 125, the rear end plate 126 is coupled to a rear cylinder port of the cylinder 121, and an inner surface thereof is provided with a rear axle hole 1261 through which the other end of the rotating shaft 1232 is inserted; The outer surface of the plate 126 is further provided with a rear Palin setting groove 1262 corresponding to the rear axle hole 1261.

The front Palin 127 is disposed in the front Palin setting groove to connect and fix the rotating shaft 1232; corresponding to the front Palin 127, the rear Palin 128 is disposed in the rear Palin setting groove 1262 to be connected The rotating shaft 1232 is fixed. As shown in the sixth figure, the cylinder 121 further has a plurality of first through holes 1212, the front end plate 125 further has a plurality of second through holes 1253, and the rear end plate 126 has a plurality of third through holes 1263; In this way, the engineer can use the plurality of first fixing holes 1212, the plurality of second through holes 1253, and the plurality of third through holes 1263 to utilize the front end plate 125 and the rear end plate. The power output shaft 123 is sealed in the cylinder 121. Therefore, it should be additionally noted that the cross-sectional view of the fourth figure further illustrates that a first air inlet passage 114 communicating with the forward rotation air hole 121 of the air motor module 12 is formed in the housing 11 and is connected to the reverse rotation. A second air inlet passage 115 of the air hole 122.

In the present invention, the grip 14 is coupled to the housing 11 and is internally provided with a gas input passage 141 for connecting an external driving gas source 3. The valve module 17 is disposed in the gas input channel 141. And includes: a valve 171, a valve stem 172 and a coil spring 173. The operation of the valve module 17 will be described simultaneously with the description of the operation of the pneumatic tool 1 of the present invention.

A first setting groove 142 is formed on the grip 14 to accommodate the plate unit 15, and the first setting groove 142 is communicated with the gas input passage 141 in the housing 11. Thus, the pressing plate unit 15 can cause the valve module 17 to be in an open state, so that a driving gas 31 provided by the external driving gas source 3 can be input to the forward/reverse switching mechanism 16 through the gas input channel 141. Valve seat 161. In addition, a second setting slot 143 is formed between the grip 14 and the housing 11 for receiving the forward/reverse switching mechanism 16, and the second setting slot 143 simultaneously communicates the gas input channel 141 with the capacitor. The space 111 is provided. Here, the second installation slot 143 is configured to pass through the first air inlet passage 114 and the second air inlet passage 115 in the housing 11 and accommodate the air motor module 12 . The spaces 111 are connected to each other.

Continue to refer to the fourth, fifth and sixth figures, and please refer to the seventh and eighth figures at the same time, which is the explosion diagram of the positive and negative switching mechanism. As shown in the figure, the forward/reverse switching mechanism 16 provided by the present invention mainly comprises: a gas valve seat 161, a control rod 162, a switching trigger member 163, and a fixing and retracting module. As shown in the seventh and eighth figures, the front end of the valve seat 161 is connected with a receiving cylinder 1616. The top of the valve seat 161 is formed with a first air inlet 1611 and a second air inlet 1612, and the valve seat 161. The bottom portion is formed with at least one air inlet 1614 and at least one air inlet 1615. The control The rod 162 includes a main rod 1621, and the main rod 1621 is coupled to a first elastic member 160 by a first connecting end 1622 thereof. In addition, the second connecting end 1623 of the main pole 1621 is in the receiving cylinder 1616 and contacts the switching trigger 163.

In general, the valve seat 161 can be coupled to the bottom of the cylinder 121 of the air motor module 12; or the valve seat 161 can be coupled to the front end plate 125 or the rear end plate of the air motor module 12. 126. In addition, as shown in the figure, the main rod 1621 is further provided with a first stopping member 1624 and a second stopping member 1625, wherein the first blocking member 1624 is located at the first connecting end 1622 and the first portion The second blocking member 1625 is disposed between the first blocking member 1623 and the second blocking member 1624. So designed, when the user presses the lever 162 to expose a portion of the housing 11 (ie, presses the switching trigger 163), the lever 162 is pushed by the switching trigger 163 into the housing 11. Moving; at this time, the fixing and retracting module fixes the moving control rod 162 to shield the first air inlet hole of the air motor module 12 by a plurality of blocking members of the control rod 162 And/or the second air inlet through hole, whereby the pneumatic tool 1 is switched to the forward rotation mode (or the reverse mode); and pressing the fixing and retracting module releases the control lever 162 such that the pneumatic The tool reverts to reverse mode (or forward mode).

In the forward/reverse switching mechanism 16 provided by the present invention, the fixing and retracting module includes a fixing component 164. As shown in the fifth and seventh figures In the eighth embodiment, the fixing component 164 is received in the switching trigger 163 and is mainly composed of a second elastic component 1641 and an abutting member 1643; wherein the second elastic component 1641 is terminated by one end. It is fixed in the switching trigger 163 by a spring fixing member 1642, and the abutting member 1643 is connected to the other end of the second elastic member 1641. In this way, when the switching trigger 163 is pressed, the abutting member 1643 is subjected to the action of the second elastic member 1641 and passes through a through hole 1631 on the side of the switching trigger member 163, thereby resisting the The cartridge 1616 is housed and the lever 162 is fixed at an end position.

In addition, the fixing and retracting module further includes a retracting component 165 disposed in a third setting slot 144 between the grip 14 and the housing 11. In the design of the present invention, the retracting assembly 165 mainly has a pressing portion 1651 and a top portion 1652. So, when the pressing portion 1651 of the retracting component 165 is pressed, the top returning portion 1652 pushes the abutting member 1643 back into the switching triggering member 163 through the fixing hole 1618 on the side of the receiving cylinder 1616; The first elastic member 160 applies a spring force to the control rod 162 to cause the second connecting end 1623 of the control rod 162 to push the switching trigger member 163 out of the housing 11 to complete the reset of the control rod 162. . Therefore, in order to facilitate the user to press the switching trigger 163, a pressing head 1632 (as shown in FIG. 5) may be disposed on the switching trigger 163; similarly, in order to facilitate the user to press The retracting component 165 can be provided with a pressing head 1654 on the pressing portion 1651 (eg Figure 5).

Thus, through the above, the constituent elements of the forward/reverse switching mechanism 16 of the present invention and their corresponding technical features have been completely and clearly explained; then, the pneumatic tool 1 and the following will be explained with the aid of the actuation diagram. The related actions of the switching mechanism 16 are reversed.

Please refer to the fifth, sixth, seventh, and eighth figures; and please refer to the operation diagram of the pneumatic tool 1 illustrated in the ninth to fifth ninth drawings. As shown in FIG. 9A, when an external driving gas source 3 is connected to the bottom of the grip 14 of the pneumatic tool 1, a driving gas 31 is charged into the gas input passage 141 in the grip 14, and the driving gas 31 is subjected to The valve module 17 in the closed state is blocked. Further, as shown in FIG. 9B, when the user presses the plate unit 15, the plate unit 15 pushes the valve stem 172 such that the valve stem 172 assumes a tilted state, so that the valve module 17 is in an open state; At this time, the driving gas 31 in the gas input passage 141 can enter the valve seat 161 through the valve 171.

Please refer to the operation diagram of the air motor module shown in FIG. 10A and FIG. As shown in the ninth C and tenth A, when the control rod 162 is in an initial position within the valve seat 161, the first stop 1624 of the control rod 162 is a shielded portion of the second air inlet 1612; At this time, the driving gas 31 entering the gas valve seat 161 from the air inlet 1614 at the bottom of the valve seat 161 enters the first air inlet hole 121C through the first air inlet hole 1611, thereby promoting the rotor in the cylinder 121. 123 is running forward (or Reverse operation). Moreover, as shown in FIG. 10A and FIG. 10B, the driving gas 31 entering the cylinder 121 is guided by the blades 124 on the rotor 123 to the second inlet passage 122C after the rotor 123 is rotated, and then Entering the second air inlet 1612 of the valve seat 161 via the second air inlet hole 122C; finally, the driving gas 31 is guided to a row in the grip 14 via the air outlet 1615 at the bottom of the valve seat 161 The gas passage 146 is discharged into the atmosphere by the exhaust passage 146.

Continuing, please refer to the fifth, sixth, seventh, and eighth figures; and please refer to the operation diagram of the pneumatic tool 1 illustrated in the eleventh to eleventh. As shown in FIG. 11A, when the external driving gas source 3 is connected to the bottom of the grip 14 of the pneumatic tool 1, the driving gas 31 is charged into the gas input passage 141 in the grip 14, and the driving gas 31 is subjected to The closed valve module 17 blocks. Further, as shown in FIG. 11B, when the user presses the plate unit 15, the valve module 17 is in an open state, so that the driving gas 31 in the gas input channel 141 can enter the valve through the valve 171. Valve seat 161. Please refer to the thirteenth drawing, which is a cross-sectional view of the forward/reverse switching mechanism 16 of the present invention, wherein the figure (a) of the thirteenth diagram is a front sectional view of the forward/reverse switching mechanism 16, and the thirteenth figure Figure (b) is a cross-sectional view taken along line AA of Figure (a). As shown, when the user has not pressed the forward/reverse switching mechanism 16, the lever 162 is in an initial position within the housing 11.

Please refer to the gas shown in Figures 13A and 13B at the same time. Actuation diagram of the motor module, and please refer to FIG. 14 at the same time, which is a cross-sectional view of the forward/reverse switching mechanism 16 of the present invention, wherein the figure (a) of the fourteenth diagram is the forward/reverse switching mechanism 16 The front cross-sectional view, and the fourteenth figure (b) is the AA cross-sectional view of the figure (a). As shown in FIG. 11B, FIG. 13A and FIG. 14 , when the switching trigger 163 is pressed to move the control lever 162 in the housing 11 , the fixing component 164 will trigger from the switching. The through hole 1631 on the side of the piece 163 is passed out to withstand the receiving tube 1616 and the lever 162 is fixed at the end position. At this time, the lever 162 is a shielded portion of the first air inlet hole 1611. Further, when the user presses the plate unit 15, the driving gas 31 enters the second air inlet hole 122c via the second air inlet 1612 of the valve seat 161, thereby causing the air motor module 12 to reversely operate (or Running forward). Further, as shown in FIG. 12A and FIG. 12B, the driving gas 31 entering the cylinder 121 is guided by the blades 124 on the rotor 123 to the first air inlet through hole 121C after the rotor 123 is rotated. And then enters the first air inlet hole 1611 of the valve seat 161 via the first air inlet hole 121C; finally, the driving gas 31 is guided into the handle 14 through the air outlet 1615 at the bottom of the valve seat 161. An exhaust passage 146 is exhausted into the atmosphere by the exhaust passage 146.

15 is a cross-sectional view of the forward/reverse switching mechanism 16 of the present invention, wherein FIG. 15(a) is a front cross-sectional view of the forward/reverse switching mechanism 16, and FIG. (b) is the AA section of Figure (a) Surface map. As shown in the fifteenth figure, pressing the retracting component 165 can push the fixing component 164 back into the switching trigger 163 to remove the topping relationship between the fixing component 164 and the switching trigger 163, so that the lever 162 Returning to an initial position (as shown in Fig. 12), the pneumatic tool is again switched to the reverse mode (or the forward mode).

Thus, through the above, the positive and negative switching mechanism 16 of the present invention and the constituent elements, corresponding technical features, and actuation modes of the pneumatic tool 1 having the forward/reverse switching mechanism have been completely and clearly illustrated; The above description shows that the present invention has the following main advantages:

(1) The forward/reverse switching mechanism of the present invention is only one air valve as compared with the forward/reverse switching module of the conventional pneumatic wrench as shown in the first, second and third figures. The seat 161, a control rod 162 and a fixing and retracting module are assembled, and have the advantages of simple structure; and the forward/reverse switching mechanism 16 is respectively disposed on the air tool 1 shell and the plate unit 15 of the pneumatic tool 1 The two different setting slots (143, 142) on the body 11 are arranged such that when the user presses the panel unit 15 with his finger (for example, the index finger), the process of the user's index finger on the pressing plate unit 15 can be effectively avoided. The medium-impact or triggering of the forward/reverse switching mechanism 16 can ensure that the pneumatic tool 1 stably operates in the forward running mode (or the reverse running mode).

(2) In addition, in order to facilitate the user to return the pneumatic tool 1 to the reverse operation mode (or the forward operation mode) through the forward/reverse switching mechanism 16 of the present invention, the present invention is a retracting component of the fixed and retracted module. 165 is set at A third setting groove 144 is formed between the grip 14 and the housing 11; thus, the user can easily complete the reset of the control rod 162 by pressing the retracting assembly 165, so that the pneumatic tool 1 returns to the reverse operation. Mode (or forward mode).

It is to be understood that the foregoing detailed description of the embodiments of the present invention is not intended to Both should be included in the scope of the patent in this case.

14‧‧‧ grip

11b‧‧‧ rear housing

142‧‧‧First setting slot

143‧‧‧Second setting slot

162‧‧‧Control lever

163‧‧‧Switch trigger

165‧‧‧Return component

161‧‧‧ gas valve seat

1616‧‧‧容筒

1611‧‧‧First air vent

1612‧‧‧Second air inlet

160‧‧‧First elastic element

1601‧‧‧Spring fasteners

1621‧‧‧ main pole

1624‧‧‧First stop

1625‧‧‧second stop

1622‧‧‧First connection

1623‧‧‧second connection

1641‧‧‧Second elastic element

1643‧‧‧After the top piece

1642‧‧‧Spring fasteners

1631‧‧‧Without holes

144‧‧‧The third setting slot

1651‧‧‧ Pressing Department

1652‧‧‧Top Back

1632‧‧‧ Pressing head

1654‧‧‧ Pressing head

Claims (7)

A positive and negative switching mechanism is disposed between a casing and a grip of a pneumatic tool, wherein a pneumatic motor module is disposed in the casing of the pneumatic tool; the forward/reverse switching mechanism includes at least: The control lever includes a main rod connected to a first elastic member by a first connecting end thereof, and the switching trigger member is connected to one of the second connecting ends of the main rod; a seat, the control valve is received therein, and the valve seat has: a first air inlet corresponding to the first air inlet hole, formed at the top of the valve seat; corresponding to the seat a second inlet hole of the second inlet passage is formed at the top of the valve seat; and at least one inlet is formed at the bottom of the valve seat; and a receiving cylinder is coupled to the gas a valve seat, the second connecting end of the control rod contacts the switching triggering member in the receiving cylinder; a fixing and retracting module is disposed inside the switching triggering member; wherein the switching triggering member is pressed Pushing the lever to move within the housing while the fixing and returning One of the set of fixing members fixes the shifting lever by pressing against the switching trigger, thereby fixing the moved lever to an end position to shield the pneumatic through a plurality of stoppers of the lever One of the first air inlet holes and/or one of the motor modules a second air inlet hole, by which the pneumatic tool is switched to a forward rotation mode (or a reverse rotation mode); and pressing the retracting component of the fixing and retracting module releases the fixing component and the switching trigger The topping relationship, thereby releasing the lever, causes the lever to return to an initial position to cause the pneumatic tool to be switched again to the reverse mode (or the forward mode). The forward/reverse switching mechanism of claim 1, wherein the plurality of blocking members comprise at least: a first stopping member disposed on the main rod and located at the first connecting end Between the second connecting end and the second connecting end, and a second stopping member disposed on the main rod and located between the first stopping member and the second connecting end. The forward/reverse switching mechanism of claim 1, wherein the valve seat is coupled to a bottom of one of the cylinders of the air motor module. The forward/reverse switching mechanism of claim 1, wherein the valve seat can be coupled to a front end plate or a rear end plate of the air motor module. The forward/reverse switching mechanism of claim 2, wherein the fixing component comprises: a second elastic component, one end of which is fixed in the switching trigger by a spring fixing member; An abutting member is coupled to the other end of the second elastic member; wherein the abutting member receives the second elastic member when the switching trigger member is pressed to move the lever in the housing Acting from a through hole on the side of the switching trigger member, thereby abutting against the receiving tube and causing the lever to be fixed at the end position, thereby causing the pneumatic tool to be switched to the Forward mode (or the reverse mode). The forward/reverse switching mechanism of claim 5, wherein the retracting component comprises a pressing portion and a top portion; wherein when the pressing portion of the retracting component is pressed, the top portion passes The receiving cylinder pushes the abutting member back into the switching trigger to release the lever, thereby causing the lever to return to the initial position due to the action of the first elastic member, thereby making the pneumatic The tool reverts to the reversal mode (or the forward mode). The forward/reverse switching mechanism of the sixth aspect of the invention, wherein the inner wall of the receiving cylinder is formed with a sliding slot and a fixing hole, and The abutting member that passes through the switching trigger member slides along the sliding slot in the receiving cylinder and slides into the fixing hole, so that the abutting member abuts against the receiving cylinder.