TWI481479B - Positive and negative 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 switching the forward and reverse rotation 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 bottom of the grip 13' is connected with a pneumatic source (not shown); thus, when the user presses the trigger mold After the group 14', the pneumatic source inputs a driving gas 31 via the grip 13' to control the operation of the air motor module.

As shown in the second and third figures, between the grip 13' and the rear housing 11' Forming a setting space 16' for setting the trigger module 14', and the installation space 16' is connected to a positive air inlet passage (not shown) inside the rear housing 11' and a reverse air inlet Channel (not shown). 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 1431' and a reverse air inlet 1432'; 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 1431 of the intake valve 143' a forward-rotating air hole 1411' communicating with the valve sleeve 141'; thus, when the user successively presses the pressing member 144', the gas input by the grip 13' passes through the positive air inlet 1431 of the intake valve 143'. And the positive air vent 1411' of the valve sleeve 141' enters the cylinder of the air motor module to drive the air motor in the cylinder to rotate in the forward direction; conversely, if the user switches the switching member 145' The reverse air inlet 212' of the air valve 143' communicates with the reverse air hole 1412' of the valve sleeve 141'; thus, when the user successively presses the pressing member 144', the gas input by the grip 13' passes through the intake air. The reverse vent 1432' of the valve 143' and the reverse vent 1412' of the valve sleeve 141' Among pneumatic motor module into the cylinder, an air motor is rotated in reverse in the drive cylinder.

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' has the following disadvantages: when the user grips the grip 13' and simultaneously presses the pressing member 144' with a finger (for example, an index finger), the user's index finger has It is possible to strike or resist the switching member 145' disposed between the pressing member 144', the grip 13' and the rear housing 11' during the pressing of the pressing member 144', resulting in the intake valve 143. The micro-rotation causes the gas flow of the driving gas 31 into the air motor module to be insufficient, and the air motor module cannot be operated 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. A switching mechanism and a pneumatic tool having the forward/reverse switching mechanism.

The main purpose of the present invention is to provide a forward and reverse switching mechanism, wherein the forward and reverse switching mechanism is composed of a control rod and a fixing and retracting module; and the forward and reverse switching mechanism is coupled with a pneumatic tool. The plate units are respectively disposed in two different setting slots on the housing; thus, when the user presses the plate unit with his finger (for example, the index finger), the user's index finger can be effectively prevented from pressing the pressing plate. The forward/reverse switching mechanism is struck or triggered during the operation of the unit, 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 housing of the pneumatic tool is provided with a a pneumatic motor module; and the forward/reverse switching mechanism includes at least: a control The rod is disposed in the casing along a first arrangement axis and has a buckle protrusion; and a fixing and retracting module, wherein the fixing and retracting module comprises: a fixing component Arranging in a side of the control rod by a pivoting column, wherein the pivoting column is disposed in the housing along a second arrangement axis orthogonal to the first arrangement axis; and a retracting component Connect the fixed component.

According to the embodiment of the forward/reverse switching mechanism of the present invention, the front end of the control lever can push the control rod to move in a linear motion along the first arrangement axis in the housing, and the fixing component will abut the control rod. The locking protrusion is configured to fix the moved control rod to an end position, and thereby shielding a first air inlet hole of the air motor module by a plurality of blocking members of the control rod and/or a second air inlet through hole, wherein the pneumatic tool is switched to a forward rotation mode (or a reverse rotation mode); and pressing the retracting component allows the fixing component to be centered on the pivoting column Rotating reciprocating motion, in this way, the abutting relationship between the fixing component and the locking protrusion is released, thereby releasing the lever, so that the lever returns to an initial position to return the pneumatic tool 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

127‧‧‧Pre-Peilin

128‧‧‧post Palin

1211‧‧‧Installation slot

121a‧‧‧First operating vent

122a‧‧‧Second running vent

121b‧‧‧ third operating vent

122b‧‧‧fourth running 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

19‧‧‧Fixed parts

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

161‧‧‧ gas valve seat

162‧‧‧Control lever

163‧‧‧Switching Department

164‧‧‧Fixed components

165‧‧‧Return component

1611‧‧‧First air vent

1612‧‧‧Second air inlet

1614‧‧‧ inlet

1615‧‧‧Inlet

160‧‧‧First elastic element

Y‧‧‧First configuration axis

1621‧‧‧ main pole

1624‧‧‧First stop

1625‧‧‧second stop

1622‧‧‧First connection

1623‧‧‧second connection

1628‧‧‧Bucking convex parts

1626‧‧‧3rd stop

144‧‧‧The third setting slot

X‧‧‧Second configuration axis

1646‧‧‧ pivoting column

1647‧‧‧ buckles

1648‧‧‧Deduction

1649‧‧‧Connecting Department

149‧‧‧fourth setting slot

147‧‧‧ notch

148‧‧‧ fitting holes

164a‧‧‧Pushing rod

164b‧‧‧Connecting parts

164c‧‧‧Resistance

145‧‧‧Exporting

166b‧‧‧Connecting Department

121C‧‧‧First air inlet through hole

122C‧‧‧Second air inlet hole

140‧‧‧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

1431’‧‧‧Into the air hole

212'‧‧‧ reverse vent

1411’‧‧‧ venting holes

1412’‧‧‧Reversal of stomata

1433'‧‧‧Switching parts connection

1451'‧‧‧Air valve connection

The first figure is a perspective view of a conventional pneumatic wrench; the second figure is a three-dimensional combination diagram of a cylinder housing, a grip, a trigger module, and a forward/reverse switching module of the pneumatic wrench; The third figure is the exploded view of the cylinder housing, the grip, the trigger module and the forward/reverse switching module of the pneumatic wrench; the fourth figure is a side sectional view of a pneumatic tool with a forward and reverse switching mechanism; Figure 5 is an exploded view of the rear housing, handle and forward and reverse switching mechanism; Figure 6 is an exploded view of the air motor module; seventh is an exploded view of the forward and reverse switching mechanism of the present invention; To the eighth diagram is the actuation diagram of the pneumatic tool; the ninth diagram is the actuation diagram of the switching part, the control rod, the fixed component, and the retracting component; the tenth A and tenth B diagrams are the actuation diagrams of the air motor module; 11A to 11B are diagrams of the pneumatic tool; FIG. 12A and 12B are schematic diagrams of the operation of the air motor module; and the thirteenth diagram is a forward and reverse switching mechanism , an exploded view of the rear housing and the grip; the fourteenth view is a combination of the forward and reverse switching mechanism, the rear housing and the grip; and the operation of the forward and reverse switching mechanism of the fifteenth diagram.

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.

Please refer to the fourth figure, which is a pneumatic with positive and negative switching mechanism. Side profile view of the tool. As shown in the fourth figure, the pneumatic tool 1 (hereinafter referred to as pneumatic tool 1) having a forward/reverse switching mechanism includes: a housing 11, a pneumatic motor module 12, a power output shaft 13, and a grip 14 A plate unit 15, a forward and reverse switching mechanism 16 of the present invention, 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 to the air motor module 12; and one of the power output shafts 13 of the power output shaft 13 is threaded out of the output shaft hole 112 of the front housing 11a for mounting a work tool, such as a screw Locking tools, wrenches, die-cutting pens, engraving tools, sanding tools, angle grinder tools, polishing tools, drill tools, or ratchet wrenches.

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 running air hole 121a and a second running air hole 122a are formed in the mounting groove 1211. The airtight member 122 is mounted in the mounting groove 1211 and has a third operating air hole 121b corresponding to the first operating air hole 121a and a fourth operating air hole 122b corresponding to the second operating air hole 122a. The first operating air hole 121a and the third operating air hole 121b constitute a first air inlet hole of the air motor module 12, and the second operating air hole 122a and the first air hole 122a The four operating air holes 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 the inner surface thereof is provided with a front shaft hole 1251 for inserting one end of the rotating shaft 1232; further, the outer surface of the front end plate 125 is further provided. A front Palin setting 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.

Therefore, 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 connect and fix the rotating shaft 1232. In addition, 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 further has a plurality of third through holes. 1263. In this manner, 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 portion. The end plate 126 seals the power take-off shaft 123 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 that communicates with the positive air venting hole of the air motor module 12 and one that communicates with the reverse air vent hole are formed in the housing 11 . The second air inlet passage 115.

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, wherein the pneumatic tool 1 will be described with respect to the operation of the valve module 17. At the same time, it will be explained.

A first setting groove 142 is formed on the grip 14 to accommodate the plate unit 15, and the first setting groove 142 is connected to the gas input passage 141. Thus, the valve module 17 can be brought into an open state by pressing the plate unit 15 so that a driving gas 31 provided by the external driving gas source 3 can be input to the valve seat 161 through the gas input channel 141. 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. 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 to accommodate the air motor module 12 . The accommodating spaces 111 are connected to each other.

Continue to refer to the fourth, fifth and sixth figures, and also refer to the seventh figure, which is the explosion diagram of the forward and reverse 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, and a fixing and retracting module; wherein the top of the gas valve seat 161 is formed with a first inlet The air hole 1611 and the second air inlet hole 1612 are formed, and the bottom of the gas valve seat 161 is formed with at least one air inlet 1614 and at least one air inlet 1615. The control rod 162 is disposed in the housing 11 along a first configuration axis Y, and includes a main rod 1621. The main rod 1621 is connected to a resilient member 160 by a first connecting end 1622 thereof. In addition, a switching portion 163 is formed on one of the second connecting ends 1623 of the main pole 1621. In addition, a locking protrusion 1628 is further disposed on the main rod 1621.

In the above description, 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 second connecting end. The second blocking member 1625 is located between the first blocking member 1624 and the second connecting end 1623. So designed, when the user presses the lever 162 to be exposed to a portion of the housing 11 (ie, the switching portion 163 of the control lever 162), the lever 162 will be in the housing 11 due to the force. The first configuration axis performs a linear motion.

The constitution of the forward/reverse switching mechanism of the present invention will be described more closely. As shown in the fifth and seventh figures, the main rod 1621 further includes a third stopper 1626 between the second stopper 1625 and the second connecting end 1623, and a dustproof ring. (not shown) is simultaneously sleeved on the main rod 1621 and adjacent to the third stopper 1626. 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, the fixing component 164 is disposed in a third setting slot 144 between the grip 14 and the housing 11, and the fixing component 164 is adjacent by a pivoting post 1646. On one side of the control rod 162, the pivot post 1646 is disposed in the housing 11 along a second configuration axis X orthogonal to the first configuration axis Y. Moreover, the two ends of the pivoting post 1646 are respectively fitted into the two fitting holes 148 in the third setting groove 144.

In the above, the fixing component 164 is mainly a fastening component 1647. The front end of the fastening component 1647 extends through the slot 147 between the third mounting slot 144 and the second mounting slot 143 into the second slot. 143, and a buckle portion 1648 is formed. In addition, the back end of the buckle 1647 is connected with a retracting component 165 (ie, a pressing button), and the pressing button is placed with the Three of the fourth setting grooves 149 connected to the groove 144 are disposed and exposed outside the casing 11. In the present invention, the locking projection 1628 is designed as a type of gyro having a front plane and an anticline; and, in order to retract the assembly 165 (ie, the pressing member), the locking projection 1628, The fixing assembly 164 can be smoothly cooperatively coupled, and a torsion spring (not shown) is mounted on the pivoting post 1646.

So, when the switching portion 163 of the control rod 162 is pressed, the control rod 162 is linearly moved along the first arrangement axis Y in the housing 11, and the locking protrusion 1628 is contacted and slipped by the anticline surface. The locking portion 1648; at this time, the buckle member 1647 is slid by the locking portion 1648, and the locking member 1647 performs one of the rotary reciprocating motions with the pivoting post 1646 as an axis. Forward rotation; at the same time, based on the effect of the torsion spring providing a force to one of the pivoting posts 1646, the latching member 1647 is attached to the latching projection 1628 after the latching portion 1648 is slid The column 1646 is rotated to reverse the rotation of one of the forward rotations, and then returned to the original position, so that the locking portion 1648 snaps against the front plane of the locking protrusion 1628 to fix the control rod 162 to The end position. And pressing the retracting component 165 can drive the connecting portion 1649 to be pressed, so that the locking member 1647 performs the forward rotation with the pivoting post 1646 as an axis (ie, the locking portion 1648 is opposite to the connecting portion). 1649 is pivoted upwards, thereby releasing the fastening relationship between the locking portion 1648 and the locking protrusion 1628, and returning the lever 162 to the initial position.

Thus, through the above, the positive and negative switching mechanism 16 of the present invention and the constituent elements of the pneumatic tool 1 having the forward/reverse switching mechanism and their corresponding technical features have been completely and clearly explained; The operation of the pneumatic tool 1 and the forward/reverse switching mechanism 16 will be described as an aid.

Please refer to the fifth and seventh figures, and please refer to the operation diagram of the pneumatic tool 1 shown in Figures 8A to 8B at the same time; and please refer to the ninth figure at the same time, which is the switching part, the control rod, Schematic diagram of the operation of the fixed component and the returned component. As shown in FIG. 8A, 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 is closed. The valve module 17 blocks. At this time, as shown in the diagram (a) of the ninth figure, the position of the locking portion 1648 of the fastening member 1647 is located at the an inclined surface of the locking projection 1628 (ie, the gyro-like body). Further, as shown in FIG. 8B, when the user presses the plate unit 15, the plate unit 15 pushes the valve stem 172 to assume a tilt state; at this time, the valve module 17 is in an open state, The driving gas 31 in the gas input passage 141 passes through the valve 171 to enter the valve seat 161.

Please refer to the operation diagram of the air motor module shown in FIG. 10A and FIG. As shown in FIG. 8B and FIG. 10A, when the control lever 162 is in an initial position within the valve seat 161, the first stopper 1624 of the control lever 162 is the second intake hole 1612 of the shielding portion. At this time, the driving gas 31 entering the valve seat 161 from the air inlet 1614 at the bottom of the valve seat 161 passes through the first air inlet 1611 and enters the first air inlet hole 121C of the air motor module 12, In this manner, the rotor 123 housed in the cylinder 121 of the air motor module 12 is caused to run forward (or reverse). Further, 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 of the air motor module 12 after the rotor 123 is rotated. The air inlet hole 122C enters the second air inlet hole 1612 of the valve seat 161 via the second air inlet hole 122C. Finally, the driving gas 31 is guided to the bottom through the air outlet 1615 at the bottom of the valve seat 161. An exhaust passage in the grip 14 140, and discharged into the atmosphere by the exhaust passage 140.

Continuing, please refer to the fifth, seventh and ninth figures; and please also refer to the actuation diagram of the pneumatic tool 1 illustrated in Figures 11A to 11B. As shown in FIG. 11A, FIG. 9(b) and FIG. 9(c), when the user presses the switching portion 163 to move the lever 162 into the housing 11 to In an end position, the buckle 1647 is fastened to the front plane of the buckle protrusion 1628 (ie, the gyro-like body) by the fastening portion 1648 to fix the control rod 162 to the end position, so that the buckle The pneumatic tool is switched to forward mode (or reverse mode). At this time, the control lever 162 shields the first air inlet hole 1611 of the portion. As shown in FIG. 11B, when the user further presses the plate unit 15, the driving gas source 3 receives a driving gas 31 through the gas input channel 141 to the gas valve seat 161, and then passes the second inlet. The air hole 1612 enters the second air inlet hole 122c, thereby causing the air motor module 12 to operate in reverse (or forward operation).

Moreover, as shown in the schematic diagrams of the operation of the air motor module of the twelfth and fourth bb, the driving gas 31 entering the cylinder 121 is diverted from the blade 124 on the rotor 123 to the rotor 123. The first air inlet through hole 121C then enters the first air inlet hole 1611 of the gas valve seat 161 via the first air inlet hole 121C; finally, the driving gas 31 is guided through the air outlet 1615 at the bottom of the valve seat 161. An exhaust passage 140 in the grip 14 is discharged into the atmosphere by the exhaust passage 140.

Thus, the above-described system has completely and clearly explained the component composition and actuation mode of the forward and reverse switching mechanism of the present invention. Next, a second embodiment of the forward/reverse switching mechanism of the present invention will be described. Please refer to the thirteenth figure, which is an exploded view of the positive and negative switching mechanism, the rear casing and the grip; and, please also refer to the fourteenth figure, which is a combination diagram of the positive and negative switching mechanism, the rear casing and the grip. . As shown in the thirteenth and fourteenth embodiments, the positive and negative of the second embodiment The switching mechanism 16 is also disposed in a second setting slot 143 between the rear housing 11b and the grip 14, and the forward/reverse switching mechanism 16 includes a lever 162 having a switching portion 163, a fixing assembly 164, and a The retracting component 165; wherein the control lever 162 and the switching portion 163 are implemented in the foregoing embodiment, the description will not be repeated.

In the second embodiment of the forward/reverse switching mechanism 16, the fixing assembly 164 includes a pivoting rod 164a, at least one connecting member 164b and an abutting member 164c, wherein the pivoting rod 164a is disposed on the pneumatic tool. Inside the housing 11, and the connecting member 164b extends from the pivoting rod 164a. The thirteenth drawing shows that the two connecting members 164b extend vertically downward from the two ends of the pivoting lever 164a, respectively. In addition, the retracting component 165 is a knob or paddle that is connected to a connecting portion 166b of the connector 164b through a through opening 145 formed at a side of the housing 11. In the second embodiment, rotating the knob (or dialing the paddle) causes the pivoting lever 164a to be rotated by an angle, whereby the relative position of an abutting member 164c above the pivoting lever 164a can be changed. With height.

In the second embodiment, a center of gravity maintaining member 166 is further connected to the connecting member 164b for maintaining the center of gravity of the pivoting rod 164a and the abutting member 164c; thus, the pivoting rod 164a can be prevented from being When the abutting member 164c does not abut against the locking projection 1628, the housing 11 is shaken by the vibration. Moreover, in order to enable the retracting assembly 165 (ie, the knob or the paddle), the latching projection 1628, and the fixing component 164 to cooperate smoothly, a torsion spring (not shown) is mounted on the pivoting lever 164a.

Continue to refer to the thirteenth figure, and also refer to the operation diagram of the forward and reverse switching mechanism of the fifteenth figure. As shown in FIGS. 13 and 15 (a) and (b), when the switching portion 163 is pressed, the lever 162 is caused in the housing 11 along the first configuration axis Y. When moving in a straight line, The buckle protrusion 1628 contacts and slides over the abutting surface 164c; at this time, the buckle member 164c is affected by the abutting member 164c. The pivoting post 1646 performs one of the rotary reciprocating motions for the shaft to rotate forward; and at the same time, the abutting member 164c is based on a force provided by one of the elastic members connected to the pivoting post 1646. After the locking protrusion 1628 is slid, the rotation of the pivoting post 1646 is reversed by one of the forward rotations to return to the original position, thereby causing the abutting member 164c to abut the locking protrusion. The front plane of 1628, in this manner, secures the lever 162 to the end position. In addition, the pivoting member 165 can be rotated by an angle such that the locking member 1647 rotates forwardly about the pivoting post 1646, thereby releasing the abutting member 164c and the locking projection. The relationship of the member 1628 is reversed and the lever 162 is returned to the initial position.

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 explained; 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 group 161, a control rod 162 and a fixing and retracting module are assembled, and have the advantages of simple structure; and the forward and reverse switching mechanism 16 is respectively disposed on the air tool 1 shell with 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. The 165 is disposed in a third setting slot 144 between the grip 14 and the housing 11; thus, the user can easily complete the reset of the lever 162 by pressing the retracting component 165, so that the pneumatic tool 1 returns to Reverse operation mode (or forward operation 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.

11‧‧‧Shell

14‧‧‧ grip

111‧‧‧ accommodating space

142‧‧‧First setting slot

143‧‧‧Second setting slot

161‧‧‧ gas valve seat

162‧‧‧Control lever

163‧‧‧Switching Department

164‧‧‧Fixed components

165‧‧‧Return component

1611‧‧‧First air vent

1612‧‧‧Second air inlet

160‧‧‧Flexible components

1621‧‧‧ main pole

1624‧‧‧First stop

1625‧‧‧second stop

1622‧‧‧First connection

1623‧‧‧second connection

1628‧‧‧Bucking convex parts

1626‧‧‧3rd stop

144‧‧‧The third setting slot

1646‧‧‧ pivoting column

1647‧‧‧ buckles

1648‧‧‧Deduction

1649‧‧‧Connecting Department

149‧‧‧fourth setting slot

147‧‧‧ notch

148‧‧‧ fitting holes

Claims (14)

A forward and reverse 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; and the forward and reverse switching mechanism is at least The utility model comprises: a control rod disposed in the casing along a first arrangement axis and having a buckle protrusion; and a fixing and retracting module comprising: a fixing component, which is pivoted a column is disposed adjacent to one side of the control rod, wherein the pivoting column is disposed in the housing along a second arrangement axis orthogonal to the first arrangement axis; and a retracting component is coupled to the a fixing assembly; wherein pressing the front end of the control rod can push the control rod to move in a linear motion along the first arrangement axis in the housing, and the fixing assembly will abut the locking protrusion of the control rod to move The rear control rod is fixed at an end position, and the first air inlet hole and/or the second air inlet hole of the air motor module are shielded by a plurality of stoppers of the control rod. This way the pneumatic tool is cut Switching to a forward rotation mode (or a reverse rotation mode); wherein pressing the retracting component allows the fixing component to perform a rotary reciprocating motion with the pivoting column as an axis, thereby releasing the fixing component and the buckle Relieving the relationship of the protruding member, thereby releasing the lever, causing the lever to return to an initial position to return the pneumatic tool Revert to the reverse mode (or the forward mode). The forward/reverse switching mechanism according to claim 1, further comprising a gas valve seat, wherein the control rod is received therein; and the gas valve seat has: corresponding to the first air inlet hole a first air inlet hole is formed at a top of the gas valve seat; a second air inlet hole corresponding to the second air inlet hole is formed at a top of the gas valve seat; and at least one air inlet is Formed at the bottom of the valve seat. The forward/reverse switching mechanism according to claim 1, wherein the control lever comprises: a main rod connected to an elastic member by a first connecting end thereof, and the second one of the main rod A switching portion is formed on the connecting end; and the locking protrusion is disposed on the main pole and adjacent to the switching portion. The forward/reverse switching mechanism of claim 2, 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 2, wherein the valve seat is coupled to one of the front end plates or the air motor module Backend board. The positive and negative switching mechanism of claim 3, wherein the plurality of blocking members comprise at least: a first blocking member disposed on the main rod and adjacent to the first connecting end And a second stopping member is disposed on the main rod and located between the first stopping member and the second connecting end. The forward/reverse switching mechanism of claim 6, wherein the locking projection is a type of gyro, and the gyro has a front plane and an anticline. The forward/reverse switching mechanism of claim 6, wherein the plurality of blocking members further comprise a third stopping member disposed on the main rod and located at the second blocking member Between the second connection ends. The forward/reverse switching mechanism of claim 7, wherein the fixing component is a fastening component disposed on the pivoting post through a resilient component and having a latching portion and a connecting portion; wherein when the switching portion is pressed such that the lever moves linearly along the first arrangement axis in the housing, the locking protrusion contacts and slides over the anticline Buckle; at this time, the buckle is convex The member slides over the buckle portion, and the buckle member rotates one of the rotary reciprocating motions with the pivoting column as an axis; and at the same time, provides a function to the pivoting column based on the elastic member According to the force, the buckle is after the buckle protrusion slides over the buckle, and is rotated by the pivoting column to reverse the rotation of the forward rotation, thereby returning to the original position. The buckle portion buckles the front plane of the buckle projection to fix the control rod to the end position. The forward/reverse switching mechanism of claim 9, wherein the retracting component is connected to the connecting portion and exposed outside the casing; wherein pressing the retracting component can drive the connecting portion The buckle is rotated in the forward direction with the pivoting column as an axis, thereby releasing the fastening relationship between the fastening portion and the locking projection, and returning the control lever to the initial position. The forward/reverse switching mechanism of claim 6, wherein the locking projection is a type of gyro, and the gyro has a front plane and an anticline. The forward/reverse switching mechanism of claim 11, wherein the fixing assembly comprises an abutting member disposed on the pivoting lever, wherein when the switching portion is pressed, the lever is Along the shell When the first configuration axis performs the linear motion, the buckle protrusion contacts and slides over the abutting surface; at this time, the buckle protrusion is affected by the abutting member, and the buckle member is affected by the abutting member. The abutting member rotates one of the rotary reciprocating motions with the pivoting column as an axis; and at the same time, the abutting member is based on the influence of a force provided by one of the elastic members connected to the pivoting post After the buckle projection is slid, the pivoting column is rotated by the rotation of the pivoting column to return to the original position, thereby restoring the front plane of the locking projection. In this way, the lever is fixed to the end position. The positive and negative switching mechanism of claim 12, wherein the fixing component further comprises: at least one connecting member extending from the pivoting lever; and at least one center of gravity maintaining member connected to the The connecting member is configured to maintain the center of gravity of the pivoting lever and the abutting member to prevent the pivoting lever from shaking due to the shock of the housing when the resisting member does not abut the locking projection. The forward/reverse switching mechanism of claim 12, wherein the retracting component is coupled to the connector and exposed outside the housing; wherein applying the retracting component can drive the pivoting The lever rotates at an angle such that the buckle rotates with the pivoting column as an axis, thereby releasing the abutting relationship between the latch and the latching protrusion, and the lever is Reset back to this initial position.