TWM634940U - Device using one-button for switching and locking forward/backward rotation of pneumatic wrench - Google Patents

Abstract

This creation is a device that uses a button to switch and lock the forward and reverse state of the pneumatic wrench, including the shell, the cylinder, the screw A, the valve seat seal ring, the valve seat, the seal ring A, the valve plug, the guide wheel A, the guide wheel B, E-shaped buckle, solid pin, screw B, baffle, sealing ring B, button, return spring, screw C; the housing is provided with a motor room, an exhaust room, an air intake room, and the mouth of the air intake room There is a sealing ring groove A, and the bottom of the housing motor chamber is provided with a screw hole B, a baffle installation sink, a sealing ring groove B, a through hole, a spring positioning sink, and a button installation square hole. The device adopts one button to switch and lock the forward and reverse function of the pneumatic wrench, abandons the rotary and two-button switching methods of the traditional pneumatic wrench, and uses a button that can be self-locked to switch the forward and reverse of the pneumatic wrench, which realizes simplified operation.

Description

A device that uses one button to switch and lock the forward and reverse functions of the pneumatic wrench

This creation relates to the technical field of pneumatic wrench, specifically a device that uses a button to switch and lock the forward and reverse functions of the pneumatic wrench.

The working principle of the pneumatic wrench is that the compressed air enters the cylinder through the air-closing mechanism, the speed regulating mechanism, and the positive and negative mechanism, and pushes the blade to drive the rotor to rotate, so that the striking mechanism produces an instantaneous high-energy alternating impact load. Because of its large torque output, it is safe to use Good performance, widely used in assembly lines, maintenance sites and other screw assembly and disassembly occasions. The screw assembly and disassembly is realized by switching the forward and reverse functions of the pneumatic wrench, so the switching operation of the forward and reverse functions of the pneumatic wrench is relatively frequent.

The forward and reverse switching of the traditional pneumatic wrench is generally divided into three categories: the first category is realized directly through the axial rotation of the regulating valve. When the pneumatic wrench is switched forward and reverse, the operator must operate with both hands, that is, the operator holds Hold the pneumatic wrench, and rotate the knob of the regulating valve with the fingers of the other hand to switch the forward and reverse of the pneumatic wrench. The second type is achieved directly through the axial linear movement of the regulating valve. There is always one end protruding from the pneumatic wrench housing at both ends of this type of pneumatic wrench regulating valve. Therefore, the forward and reverse switching function of this type of pneumatic wrench is a two-button type. These two buttons are respectively located at the front and rear ends of the pneumatic wrench or on the left and right sides. There is a certain distance between the two ends of the valve and the handle, and the forward and reverse switching of the pneumatic wrench brings inconvenience to the operator. The third type is realized by indirectly pushing the regulating valve to rotate axially through two side-by-side buttons located at the rear end of the pneumatic wrench. The forward and reverse switching device of this type of pneumatic wrench uses two buttons which are slightly redundant, and misoperation often occurs. To sum up, the function switching of traditional pneumatic wrench, especially the forward and reverse switching, brings a lot of inconvenience to the operator.

Therefore, the switching of the forward and reverse functions of the traditional pneumatic wrench has the disadvantages that it cannot be operated without changing the grip posture and that operators with different hand habits can obtain the same operating feel.

The purpose of this creation is to provide a device that uses one button to switch and lock the forward and reverse functions of the pneumatic wrench, so as to solve the problems raised in the above-mentioned background technology.

In order to achieve the above purpose, this creation provides the following technical solutions: A device that uses a button to switch and lock the forward and reverse states of the pneumatic wrench includes a housing, a cylinder, a screw A, a valve seat sealing ring, a gas valve seat, a sealing ring A, Valve plug, guide wheel A, guide wheel B, E-shaped buckle, solid pin, screw B, baffle plate, sealing ring B, button, return spring, screw C; the housing is provided with a motor room, an exhaust room, Air intake chamber, the mouth of the air intake chamber is provided with a sealing ring groove A, the bottom of the housing motor chamber is provided with a screw hole B, a baffle mounting platform, a sealing ring groove B, a through hole, a spring positioning platform, and a button installation square hole The cylinder is placed in the motor group, and the cylinder is provided with air groove A, air groove B, screw hole A, eccentric inner hole, exhaust hole, and arc grooves are arranged on both ends; the air valve seat is provided with a sealing ring Groove C, air groove C, air groove D, air intake hole, exhaust groove, air valve hole, screw through hole A, solid pin installation hole, the valve seat sealing ring is placed in the sealing ring groove C, and the air valve seat passes through The screw A is connected with the cylinder so that the air groove C is always connected with the cylinder air groove A, the air groove D is always connected with the cylinder air groove B, and the air intake hole is always connected with the air intake chamber of the housing; the sealing ring A is placed in the housing In the groove A of the sealing ring, the air inlet chamber of the shell is sealed and communicated with the air inlet hole of the valve seat; Hole C, the valve plug can slide axially in the valve hole of the valve seat; the outer circle of the guide wheel A is alternately provided with rear stop guide grooves with openings at a certain inclination angle, front stop guide grooves with openings at a certain inclination angle, The stop point of the front stop guide groove, the axis through hole A, the small end is provided with a card slot A; the outer circle of the guide wheel B is provided with a guide groove with a certain inclination angle, the stop point of the guide groove, and the axis through hole B, the small end is provided with a card slot B; the guide wheel B cooperates with the card slot A of the guide wheel A through the card slot B, so that the guide wheel A and the guide wheel B form a guide wheel group, and the rear stop guide groove, the front stop guide groove and the guide wheel The rotary groove constitutes a completed working guide groove. The guide wheel set is installed on the guide wheel shaft of the valve bolt and can rotate; the groove of the valve bolt buckle ring is equipped with an E-shaped buckle ring, which is used to limit the axial relative movement between the guide wheel set and the valve bolt. to move the guide wheel group and the valve plug axially together; the solid pin is inserted into the solid pin mounting hole of the valve seat and placed in the working guide groove of the guide wheel group, restrained by the solid pin, the guide wheel group can only Specific axial movement and rotation movement; the sealing ring B and the baffle are placed in the housing sealing ring groove B and the baffle in turn, and the baffle is locked on the housing through the screw B; the valve bolt guide wheel shaft from The inner hole of the sealing ring B and the through hole of the housing penetrate into the square hole for installing the keys of the housing, and the sealing ring B plays the role of isolating the compressed air in the motor chamber of the housing from leaking to the outside of the housing; the key is provided with a spring positioning shaft , square hole, and screw hole are sunk, the square hole is matched with the square head of the valve bolt, and locked by the screw C, so that the valve bolt and the button are connected as one, and the button is installed in the square hole for the button installation of the shell, limiting the valve bolt and the button to only Axial movement but not axial rotation; the return spring is placed between the housing spring positioning sinker and the key spring positioning shaft, and plays the role of locking the positive and negative working state of the valve plug and resetting the state; when the external force presses the key , Push the button to push the valve plug, E-shaped buckle, guide wheel group to overcome the return spring Axial movement, when the guiding groove of the guide wheel B in the guide wheel group touches the solid pin, the guiding wheel group automatically rotates to avoid the solid pin, and finally the stop point of the guiding groove of the guiding wheel B is locked on the solid pin, At this time, the external force of the button is released, and under the action of the return spring, the valve plug, the guide wheel group, the E-shaped buckle, and the button start to perform axial reset movement. When the front stop guide groove of the guide wheel A in the guide wheel group contacts the solid pin At this time, the guide wheel group automatically rotates to avoid the solid pin, and finally the stop point of the front guide groove of the guide wheel A is locked on the solid pin. D, the air groove E of the valve pin connects the air groove C of the valve seat and the exhaust chamber of the shell, so that the pneumatic wrench switches to the reverse working state; when the button is pressed again, the button pushes the valve bolt, E-shaped buckle, guide The wheel set overcomes the return spring to move axially. When the guide wheel B in the guide wheel set touches the solid pin, the guide wheel set automatically rotates to avoid the solid pin, and finally the stop point of the guide wheel B's guide groove stops. Stop at the solid pin, release the external force of the button at this time, under the action of the return spring, the valve plug, guide wheel group, E-shaped buckle, and button start to make axial reset movement, when the rear stop of the guide wheel A in the guide wheel group When the guide groove touches the solid pin, the guide wheel set automatically rotates to avoid the solid pin, and finally the valve bolt shoulder is locked on the solid pin. At this time, the air groove E of the valve bolt connects the air inlet hole and the air groove C of the valve seat. , The air groove F of the valve pin communicates with the air groove D of the valve seat and the exhaust groove, so that the pneumatic wrench is switched to the forward rotation working state. That is, each time the button is pressed to the bottom by external force and then released, the pneumatic wrench will realize the switching and locking of the working state of forward rotation and reverse rotation.

Preferably, the housing is provided with a motor chamber, an exhaust chamber, and an air intake chamber. The mouth of the air intake chamber is provided with a sealing ring groove A, and a screw hole B is provided under the motor chamber of the housing. Ring groove B, through hole, spring positioning sink, button installation square hole.

Preferably, the cylinder is placed in the motor group, and the cylinder is provided with an air groove A, an air groove B, a screw hole A, an eccentric inner hole, an exhaust hole, and arc grooves are arranged on both ends.

Preferably, the air valve seat is provided with sealing ring groove C, air groove C, air groove D, air intake hole, exhaust groove, air valve hole, screw through hole A, solid pin mounting hole, air valve seat sealing ring Placed in the groove C of the sealing ring to isolate the channeling between the air groove C, the air groove D and the outside world; the air valve seat is connected to the cylinder through the screw A, so that the air groove C and the cylinder air groove A are always connected, and the air groove D is always connected with the cylinder air groove B, and the air intake hole is always connected with the air intake chamber of the housing; the sealing ring A is placed in the sealing ring groove A of the housing, so that the air intake chamber of the housing is in sealing communication with the air intake hole of the valve seat.

Preferably, the valve pin is provided with an air groove E, an air groove F, a shaft shoulder, a guide wheel shaft, a retaining ring groove, a square head, and a screw hole C, and the valve pin can slide axially in the valve hole of the valve seat.

Preferably, the outer circle of the guide wheel A is alternately provided with a rear stop guide groove with a certain inclination angle opening, a front stop guide groove with a certain inclination angle opening, a stop point of the front stop guide groove, an axis through hole A, and a small end With card slot A.

Preferably, the outer circle of the guide wheel B is provided with a guiding groove with a certain inclination angle, a stop point of the guiding groove, and an axis through hole B, and the small end is provided with a slot B; the guide wheel B passes through the slot B and The guide wheel A is matched with the groove A, so that the guide wheel A and the guide wheel B form a guide wheel group, and the rear stop guide groove, the front stop guide groove and the guide rotation groove form a completed working guide groove, and the guide wheel group is installed on the valve bolt guide. On the wheel shaft, it is rotatable; an E-shaped buckle is installed in the valve bolt retaining ring groove, which is used to limit the axial relative movement of the guide wheel group and the valve bolt, so that the guide wheel group and the valve bolt can move axially together.

Preferably, the solid pin is inserted into the mounting hole of the solid pin of the air valve seat and placed in the working guide groove of the guide wheel set, restrained by the solid pin, the guide wheel set can only perform specific axial movement and rotation movement.

Preferably, the button is provided with a spring positioning shaft, a square hole, and a screw sink platform, and the square hole is matched with the square head of the valve bolt, and is locked by a screw C, so that the valve bolt and the button are connected as one, and the button is installed on the housing button installation side. In the hole, the valve pin and the button are restricted to move axially but not rotate axially.

Preferably, the return spring is placed between the housing spring positioning sinker and the button spring positioning shaft, so as to lock the forward and reverse working state of the valve bolt and reset the state.

Compared with the prior art, the beneficial effect of this creation is: the device adopts a button to switch and lock the forward and reverse functions of the pneumatic wrench. A button in the self-locking state can switch the forward and reverse of the pneumatic wrench, which simplifies the operation; this forward and reverse switching device can not remove the supporting hand when operating the forward and reverse switching of the pneumatic wrench, and can make operators with different hand habits All can obtain the same operating feel, reducing the occurrence of misoperation.

The following will clearly and completely describe the technical solution in the embodiment of the invention with reference to the drawings in the embodiment of the invention. Obviously, the described embodiment is only a part of the embodiments of the invention, not all embodiments. Based on the embodiments in this creation, all other embodiments obtained by persons of ordinary skill in the art without making progressive efforts belong to the scope of protection of this creation.

This creation provides a technical solution: a device that uses a button to switch and lock the forward and reverse states of the pneumatic wrench includes a housing 1, a cylinder 2, a screw A3, a valve seat sealing ring 4, a valve seat 5, a sealing ring A6, and a valve plug 7. Guide wheel A8, guide wheel B9, E-shaped buckle 10, solid pin 11, screw B12, baffle plate 13, seal ring B14, button 15, return spring 16, screw C17; housing 1 is provided with motor chamber 1- 1. Exhaust chamber 1-2, air intake chamber 1-3, the mouth of air intake chamber 1-3 is provided with a sealing ring groove A1-4, and the bottom of housing 1 motor chamber 1-1 is provided with screw holes B1-5, Baffle installation platform 1-6, sealing ring groove B1-7, through hole 1-8, spring positioning platform 1-9, button installation square hole 1-10; cylinder 2 is placed in motor group 18, cylinder 2 is set There are air grooves A2-1, air grooves B2-2, screw holes A2-3, eccentric inner holes 2-4, exhaust holes 2-5, and arc grooves 2-6 on both ends; Seal ring groove C5‑1, air groove C5‑2, air groove D5‑3, air intake hole 5‑4, exhaust groove 5‑5, air valve hole 5‑6, screw through hole A5‑7, solid pin installation Hole 5-8, the air valve seat sealing ring 4 is placed in the sealing ring groove C5-1, the air valve seat 5 is connected to the cylinder 2 through the screw A3, so that the air groove C5-2 and the air groove A2-1 of the cylinder 2 are always connected, The air groove D5-3 is always connected with the air groove B2-2 of the cylinder 2, and the air inlet 5-4 is always connected with the air inlet chamber 1-3 of the housing 1; the sealing ring A6 is placed in the sealing ring groove A1-4 of the housing 1 , so that the housing 1 air intake chamber 1-3 is in sealing communication with the air valve seat 5 air intake hole 5-4; the valve plug 7 is provided with air groove E7-1, air groove F7-2, shaft shoulder 7-3, guide wheel 7‑4, buckle groove 7‑5, square head 7‑6, screw hole C7‑7, the valve plug 7 can slide axially in the valve seat 5 valve hole 5‑6; the outer circle of the guide wheel A8 is set alternately There is a rear stop guide groove 8‑1 with a certain inclination angle in the opening, a front stop guide groove with a certain inclination angle in the opening 8‑2, a stop point in the front stop guide groove 8‑3, an axis through hole A8‑4, and the small end is provided with There is a card slot A8‑5; the outer circle of the guide wheel B9 is provided with a guide wheel 9‑1 with an opening with a certain inclination angle, a stop point of the guide wheel 9‑2, a shaft through hole B9‑3, and a card slot at the small end B9‑4; the guide wheel B9 cooperates with the guide wheel A8 card slot A8‑5 through the card slot B9‑4, so that the guide wheel A8 and the guide wheel B9 form the guide wheel group 20, the rear stop guide groove 8‑1, and the front stop guide groove 8‑2 and guide groove 9‑1 constitute a completed working guide groove, and the guide wheel group 20 is installed on the valve bolt 7 guide wheel shaft 7‑4 and is rotatable; the valve bolt 7 buckle groove 7‑5 is equipped with an E type The retaining ring 10 is used to limit the axial relative movement of the guide wheel set 20 and the valve plug 7, so that the guide wheel set 20 and the valve plug 7 move axially together; the solid pin 11 is inserted into the valve seat 5 and the solid pin installation hole 5 ‑8 and placed in the working guide groove of the guide wheel set 20, restrained by the solid pin 11, the guide wheel set 20 can only make a specific axial movement and rotation movement; the sealing ring B14 and the baffle plate 13 are placed in the housing 1 in sequence Sealing ring groove B1‑7, baffle plate installation sinking platform 1‑6 In the middle, lock the baffle 13 on the housing 1 through the screw B12; the guide wheel shaft 7-4 of the valve bolt 7 passes through the inner hole of the sealing ring B14 and the through hole 1-8 of the housing 1 to the button installation square hole of the housing 1 In 1-10, the sealing ring B14 plays the role of isolating the compressed air in the motor chamber 1-1 of the housing 1 from leaking to the outside of the housing 1; the button 15 is provided with a spring positioning shaft 15-1, a square hole 15-2, The screw hole sinks 15-3, the square hole 15-2 is matched with the square head 7-6 of the valve bolt 7, and is locked by the screw C17, so that the valve bolt 7 is connected with the button 15, and the button 15 is installed on the housing 1 button installation side. In the hole 1‑10, the valve plug 7 and the button 15 can only move axially but cannot rotate axially; the return spring 16 is placed between the spring positioning sinker 1‑9 of the housing 1 and the spring positioning shaft 15‑1 of the button 15 , to play the role of locking the forward and reverse working state of the valve plug 7 and resetting the state; when the button 15 is pressed by an external force, the button 15 pushes the valve plug 7, the E-shaped buckle 10, and the guide wheel group 20 to overcome the return spring 16 and move axially, When the guiding groove 9-1 of the guide wheel B9 in the guiding wheel group 20 contacts the solid pin 11, the guiding wheel group 20 automatically rotates to avoid the solid pin 11, and finally the guiding groove stop point 9-2 of the guiding wheel B9 Locked on the solid pin 11, release the external force of the button 15 at this time, under the action of the return spring 16, the valve plug 7, the guide wheel group 20, the E-shaped buckle 10, and the button 15 start to make an axial reset movement, when the guide wheel When the front stop guide groove 8‑2 of the guide wheel A8 in group 20 contacts the solid pin 11, the guide wheel group 20 automatically rotates to avoid the solid pin 11, and finally the stop point 8‑3 of the front stop guide groove of the guide wheel A8 is locked. Stop at the solid pin 11. At this time, the valve pin 7 air groove F7-2 communicates with the air inlet hole 5-4 and the air groove D5-3 of the valve seat 5, and the valve pin 7 air groove E7-1 communicates with the air valve seat 5. Groove C5‑2 and housing 1 exhaust chamber 1‑2 switch the pneumatic wrench to the reverse working state; when the button 15 is pressed again, the button 15 pushes the valve plug 7, the E-shaped buckle 10, and the guide wheel group 20 Overcoming the axial movement of the return spring 16, when the guiding groove 9-1 of the guide wheel B9 in the guide wheel group 20 contacts the solid pin 11, the guide wheel group 20 automatically rotates to avoid the solid pin 11, and finally the guide wheel B9 The stop point 9-2 of the guide groove is locked on the solid pin 11. At this time, the external force of the button 15 is released. Under the action of the return spring 16, the valve plug 7, the guide wheel group 20, the E-shaped buckle 10, and the button 15 start to operate. Axial resetting movement, when the rear stop guide groove 8-1 of the guide wheel A8 in the guide wheel group 20 contacts the solid pin 11, the guide wheel group 20 automatically rotates to avoid the solid pin 11, and finally the valve bolt 7 shaft shoulder 7 ‑3 is locked on the solid pin 11. At this time, the air groove E7‑1 of the valve bolt 7 is connected to the air inlet hole 5‑4 of the valve seat 5 and the air groove C5‑2, and the air groove F7‑2 of the valve bolt 7 is connected to the air valve Seat 5 air groove D5-3 and exhaust groove 5-5 make the pneumatic wrench switch to the forward rotation working state. That is, each time the button 15 is pressed to the bottom by an external force and then released, the pneumatic wrench will realize switching and locking of the working state of forward rotation and reverse rotation. As shown in Figure 1 and Figure 3, housing 1 is provided with motor chamber 1-1, exhaust chamber 1-2, air intake chamber 1-3, and air intake chamber 1-3 mouth is provided with sealing ring groove A1‑4, screw hole B1‑5 under motor chamber 1‑1 of housing 1, baffle installation sink 1‑6, sealing ring groove B1‑7, through hole 1‑8, spring positioning sink 1‑9 , Key installation square hole 1‑10.

As shown in Figure 4, the cylinder 2 is placed in the motor group 18, and the cylinder 2 is provided with an air groove A2-1, an air groove B2-2, a screw hole A2-3, an eccentric inner hole 2-4, and an exhaust hole 2-5 , both ends are provided with arc grooves 2-6.

As shown in Figure 1, Figure 4 and Figure 5, the air valve seat 5 is provided with sealing ring groove C5-1, air groove C5-2, air groove D5-3, air inlet hole 5-4, exhaust groove 5-5 , Air valve hole 5‑6, screw through hole A5‑7, solid pin installation hole 5‑8, air valve seat sealing ring 4 is placed in sealing ring groove C5‑1, and air groove C5‑2 and air groove D5‑1 are isolated Channeling between 3 and the outside world; the air valve seat 5 is connected to the cylinder 2 through the screw A3, so that the air groove C5-2 is always connected with the air groove A2-1 of the cylinder 2, and the air groove D5-3 is connected with the air groove of the cylinder 2 B2-2 is always connected, and the air inlet 5-4 is always connected with the air inlet chamber 1-3 of the housing 1; the sealing ring A6 is placed in the sealing ring groove A1-4 of the housing 1, so that the air inlet chamber 1-3 of the housing 1 3 is in sealing communication with air valve seat 5 air inlet 5-4.

As shown in Figure 5 and Figure 6, the valve bolt 7 is provided with air groove E7-1, air groove F7-2, shaft shoulder 7-3, guide wheel shaft 7-4, buckle groove 7-5, square head 7-6 , screw hole C7-7, the valve bolt 7 can slide axially in the valve seat 5 valve hole 5-6.

As shown in Figure 7, the outer circle of the guide wheel A8 is alternately provided with a rear stop guide groove 8-1 with a certain inclination angle in the opening, a front stop guide groove 8-2 with a certain inclination angle in the opening, and a stop point 8-2 in the front stop guide groove. 3. A8‑4 through the shaft center hole, and a card slot A8‑5 at the small end.

As shown in Figure 7, Figure 8 and Figure 10, the outer circle of the guide wheel B9 is provided with a guiding groove 9-1 with a certain inclination angle opening, a stop point 9-2 of the guiding groove, and a shaft center through hole B9-3. There is a card slot B9-4 at the end; the guide wheel B9 cooperates with the guide wheel A8 card slot A8-5 through the card slot B9-4, so that the guide wheel A8 and the guide wheel B9 form a guide wheel group 20, and the rear stop guide slot 8-1 , the front stop guide groove 8‑2 and the guide rotation groove 9‑1 constitute a completed working guide groove, and the guide wheel group 20 is installed on the valve bolt 7 guide wheel shaft 7‑4, which is rotatable; the valve bolt 7 snap ring groove 7‑ 5 is equipped with an E-shaped buckle 10, which is used to limit the axial relative movement of the guide wheel set 20 and the valve bolt 7, so that the guide wheel set 20 and the valve bolt 7 move axially together.

As shown in Figure 10, the solid pin 11 is inserted into the solid pin mounting hole 5-8 of the air valve seat 5 and placed in the working guide groove of the guide wheel set 20, restrained by the solid pin 11, the guide wheel set 20 can only be used as a specific shaft Directional motion and rotational motion.

As shown in Figures 9 to 10, the button 15 is provided with a spring positioning shaft 15-1, a square hole 15-2, and a screw sink platform, and the square hole 15-2 cooperates with the square head 7-6 of the valve bolt 7, and is locked by the screw C17. Tighten, make valve pin 7 and button 15 be connected integrally, and button 15 is installed in housing 1 button installation square hole 1-10, and restriction valve pin 7 and button 15 can only move axially and can not rotate axially.

As shown in Figure 10, the return spring 16 is placed between the spring positioning sinker 1-9 of the housing 1 and the spring positioning shaft 15-1 of the key 15, and plays the role of locking the forward and reverse working state of the valve plug 7 and the state reset.

As shown in Figures 11 to 14, the following is a description of the forward and reverse switching principle of a device that uses a button to switch and lock the forward and reverse states of the pneumatic wrench:

In the forward rotation state, under the action of the return spring 16, the shaft shoulder 7-3 of the valve pin 7 is locked on the solid pin 11. At this time, the air groove E7-1 of the valve pin 7 communicates with the air intake hole 5-4 of the valve seat 5 and the air intake hole 5-4. Groove C5-2, valve plug 7 air groove F7-2 communicates with air valve seat 5 air groove D5-3 and exhaust groove 5-5. At this time, it is in the forward rotation working state, and the air wrench intake will work in forward rotation.

In the reverse state, when the button 15 is pressed by an external force, the button 15 pushes the valve plug 7, the E-shaped buckle 10, and the guide wheel group 20 to overcome the return spring 16 to move axially. When -1 touches the solid pin 11, the guide wheel set 20 automatically rotates to avoid the solid pin 11, and finally the stop point 9-2 of the guiding groove of the guide wheel B9 is locked on the solid pin 11, and the external force of the button 15 is released at this time , under the action of return spring 16, valve plug 7, guide wheel group 20, E-shaped buckle 10, button 15 start to make axial reset movement, when the front stop guide groove 8‑2 of guide wheel A8 in guide wheel group 20 When contacting the solid pin 11, the guide wheel set 20 automatically rotates to avoid the solid pin 11, and finally the stop point 8-3 of the guide wheel A8 is locked on the solid pin 11, and at this time, the valve bolt 7 air groove F7 ‑2 communicates with the air inlet 5‑4 of the valve seat 5 and the air groove D5‑3, and the valve bolt 7 air groove E7‑1 communicates with the air groove C5‑2 of the valve seat 5 and the exhaust chamber 1‑2 of the housing 1 , at this time switch to the reverse working state, the pneumatic wrench intake will work reversely.

Return to the forward rotation state. When the button 15 is pressed again with an external force, the button 15 pushes the valve plug 7, the E-shaped buckle 10, and the guide wheel group 20 to overcome the return spring 16 and move axially. When the guide wheel B9 in the guide wheel group 20 rotates When the groove 9-1 touches the solid pin 11, the guide wheel set 20 automatically rotates to avoid the solid pin 11, and finally the stop point 9-2 of the guiding groove of the guide wheel B9 is locked on the solid pin 11, and the button 15 is released at this time Under the action of the return spring 16, the valve plug 7, the guide wheel group 20, the E-shaped buckle 10, and the key 15 start to perform axial reset movement. When the rear stop guide groove 8 of the guide wheel A8 in the guide wheel group 20 When -1 touches the solid pin 11, the guide wheel set 20 automatically rotates to avoid the solid pin 11, and finally the valve pin 7 shaft shoulder 7-3 is locked on the solid pin 11, and the air groove E7-1 of the valve pin 7 is connected Air intake hole 5-4 and air groove C5-2 of valve seat 5 are connected, and valve plug 7 air groove F7-2 communicates with air valve seat 5 air groove D5-3 and exhaust groove 5-5. In the working state, the air intake of the pneumatic wrench will work in the forward direction.

As shown in Figures 15 to 16, the following is a description of the gas flow during the work of a device that uses a button to switch and lock the forward and reverse states of the pneumatic wrench: Forward rotation working state air intake process, after pneumatic wrench connects air source and opens switch, compressed air enters in housing 1 air intake chamber 1-3, passes through air valve seat 5 air intake holes 5-4, valve bolt 7 air grooves E7-1, air valve seat 5 air grooves C5-2, enter the motor group 18 cylinder 2 air grooves A2-1, so that the motor group 18 rotates clockwise so as to drive the strike group 19 to also realize clockwise rotation.

The exhaust process in forward working state is divided into two parts:

(1) Part of the exhaust gas is discharged from the exhaust hole 2-5 of the cylinder 2 of the motor group 18, and discharged to the outside world through the exhaust chamber 1-2 of the housing 1.

(2) The remaining exhaust gas is discharged from the motor group 18 cylinder 2 air groove B2-2, and enters the shell through the air valve seat 5 air groove D5-3, the valve plug 7 air groove F7-2, and the air valve seat 5 exhaust groove 5-5 Body 1 exhaust chamber 1-2 discharges the outside world.

The compressed air continues to flow through the above-mentioned path, which can realize the continuous clockwise rotation of the pneumatic wrench. If it is necessary to switch the reverse operation, just press the button 15 to switch the working state.

The air intake process is reversed, when the pneumatic wrench is connected to the air source and the switch is turned on, the compressed air enters the air intake chamber 1-3 of the casing 1, passes through the air valve seat 5 air intake hole 5-4, and the valve plug 7 air groove F7-2, air valve seat 5 air groove D5-3, enter motor group 18 cylinder 2 air groove B2-2, make motor group 18 rotate counterclockwise so as to drive striking group 19 to also realize counterclockwise rotation.

The exhaust process of the reverse working state is divided into two parts:

(1) Part of the exhaust gas is discharged from the exhaust hole 2-5 of the cylinder 2 of the motor group 18, and discharged to the outside world through the exhaust chamber 1-2 of the housing 1.

(2) The remaining exhaust gas is discharged from the motor group 18 cylinder 2 air groove A2-1, and enters the shell through the air valve seat 5 air groove C5-2, the valve plug 7 air groove E7-1, and the air valve seat 5 air valve hole 5-6 Body 1 exhaust chamber 1-2 discharges the outside world.

The compressed air continues to flow through the above-mentioned path, which can realize the continuous counterclockwise rotation of the pneumatic wrench. If you need to switch the reverse operation, you only need to press the button 15 to switch the working state.

Working principle: For this type of device that uses a button to switch and lock the forward and reverse functions of the pneumatic wrench, in the forward rotation state, under the action of the return spring, the shoulder of the valve bolt is locked on the solid pin, and the air groove E of the valve bolt is connected. The air intake hole and air groove C of the valve seat are connected, and the air groove F of the valve plug is connected with the air groove D and the exhaust groove of the valve seat. At this time, it is in the normal rotation working state, and the air wrench will work in the forward rotation when the air intake is entered;

In the reverse state, when the button is pressed by external force, the button pushes the valve plug, E-shaped buckle, and the guide wheel group to overcome the return spring to move axially. When the guide groove of the guide wheel B in the guide wheel group touches the solid pin, the guide wheel group In order to avoid the solid pin, it automatically rotates, and finally the stop point of the guiding groove of the guide wheel B is locked on the solid pin. At this time, the external force of the button is released, and under the action of the return spring, the valve bolt, guide wheel group, E-shaped buckle The ring and the button start to make axial reset movement. When the front stop guide groove of guide wheel A in the guide wheel group touches the solid pin, the guide wheel group automatically rotates to avoid the solid pin, and finally the front stop guide groove of guide wheel A The stop point is locked on the solid pin. At this time, the air groove F of the valve pin is connected with the air inlet hole of the valve seat and the air groove D, and the air groove E of the valve pin is connected with the air groove C of the valve seat and the exhaust chamber of the shell. At this time Switch to the reverse working state, and the air intake of the pneumatic wrench will work reversely;

Restore the forward rotation state. When the button is pressed again with external force, the button pushes the valve plug, the E-shaped buckle, and the guide wheel group to overcome the return spring to move axially. When the guide groove of the guide wheel B in the guide wheel group touches the solid pin, the guide wheel The wheel set automatically rotates to avoid the solid pin, and finally the stop point of the guiding groove of the guide wheel B is locked on the solid pin. At this time, the external force of the button is released, and under the action of the return spring, the valve plug, guide wheel group, E The type buckle and the button start to make an axial reset movement. When the rear stop guide groove of the guide wheel A in the guide wheel group touches the solid pin, the guide wheel group automatically rotates to avoid the solid pin, and finally the valve bolt shaft shoulder is locked. For the solid pin, at this time, the air groove E of the valve pin is connected with the air inlet hole and the air groove C of the valve seat, and the air groove F of the valve pin is connected with the air groove D and the exhaust groove of the valve seat, and it is switched to the normal rotation working state at this time , the intake air of the air wrench will work forward.

The following is a description of the gas flow during the work of a device that uses a button to switch and lock the forward and reverse states of the pneumatic wrench:

During the air intake process in the forward rotation state, when the pneumatic wrench is connected to the air source and the switch is turned on, the compressed air enters the air intake chamber of the shell, passes through the air inlet hole of the valve seat, the air groove E of the valve plug, the air groove C of the valve seat, and enters the The air groove A of the cylinder of the motor group makes the motor group rotate clockwise so as to drive the percussion group to also realize clockwise rotation.

The exhaust process in forward working state is divided into two parts:

(1) Part of the exhaust gas is discharged from the exhaust hole of the cylinder of the motor group, and discharged to the outside world through the exhaust chamber of the housing.

(2) The remaining exhaust gas is discharged from the air groove B of the cylinder of the motor group, and enters the exhaust chamber of the housing through the air groove D of the valve seat, the air groove F of the valve plug, and the exhaust groove of the valve seat to be discharged to the outside.

The compressed air continues to flow through the above path, which can realize the continuous clockwise rotation of the pneumatic wrench. If you need to switch the reverse operation, you only need to press the button to switch the working state.

In the air intake process in the reverse working state, when the pneumatic wrench is connected to the air source and the switch is turned on, the compressed air enters the air intake chamber of the shell, passes through the air inlet hole of the valve seat, the air groove F of the valve plug, the air groove D of the valve seat, and enters the The cylinder air groove B of the motor group makes the motor group rotate counterclockwise so as to drive the percussion group to also realize counterclockwise rotation.

The exhaust process of the reverse working state is divided into two parts:

(1) Part of the exhaust gas is discharged from the exhaust hole of the cylinder of the motor group, and discharged to the outside world through the exhaust chamber of the housing.

(2) The rest of the exhaust gas is discharged from the air groove A of the cylinder of the motor group, and enters the exhaust chamber of the housing through the air groove C of the valve seat, the air groove E of the valve plug, and the valve hole of the valve seat and is discharged to the outside world.

The compressed air continues to flow through the above path, which can realize the continuous counterclockwise rotation of the pneumatic wrench. If you need to switch the reverse work, you only need to press the button to switch the working state.

Although the embodiments of the invention have been shown and described, those skilled in the art can understand that various changes, modifications, substitutions and variants, the scope of this work is defined by the appended claims and their equivalents.

1: shell 1‑1: Motor room 1‑2: exhaust chamber 1‑3: Air intake chamber 1‑4: sealing ring groove A 1‑5: Screw hole B 1‑6: Baffle installation countertop 1‑7: Seal ring groove B 1‑8: Through hole 1‑9: Spring positioning sink 1-10: Button installation square hole 2: Cylinder 2‑1: Air tank A 2‑2: Air tank B 2‑3: Screw hole A 2‑4: Eccentric Bore 2‑5: Exhaust hole 2‑6: arc groove 3: Screw A 4: Gas valve seat sealing ring 5: Air valve seat 5‑1: Seal ring groove C 5‑2: Air tank C 5‑3: Air tank D 5‑4: Air intake 5‑5: Exhaust slot 5‑6: Air valve hole 5‑7: Screw through hole A 5‑8: Solid pin mounting holes 6: sealing ring A 7:Valve plug 8: Guide wheel A 8‑1: Rear stop guide 8‑2: Front stop guide groove 8‑3: Stop point of front stop guide groove 8‑4: Shaft through hole A 8‑5: Card Slot A 9: Guide wheel B 9‑1: Guiding groove 9‑2: The stop of the guide groove 9‑3: Shaft through hole B 9‑4: Card slot B 10: E-type buckle 11: Solid pin 12: Screw B 13: Baffle 14: sealing ring B 15: button 15‑1: Spring positioning shaft 15‑2: Square hole 15‑3: Screw sinking platform 16: return spring 17: Screw C 18: Motor group 19: Strike Group 20: guide wheel set

[Figure 1] Schematic diagram of the decomposition structure of this work; [Figure 2] Schematic diagram of the decomposition structure of this work; [Figure 3] A schematic diagram of the upper part of the shell of this creation; [Figure 4] Schematic diagram of the cylinder structure of this creation; [Figure 5] It is a schematic diagram of the structure of the upper part of the valve seat of this creation; [Figure 6] Schematic diagram of the valve bolt structure of this creation; [Figure 7] Schematic diagram of the structure of Introduction A of the book creation; [Figure 8] Schematic diagram of the structure of the introduction to the creation of the series B; [Figure 9] Schematic diagram of the upper part of the system creation button; [Figure 10] Schematic diagram of the partial structure of the book creation; [Figure 11] Structural diagram of the forward working state of this creation; [Figure 12] The state schematic diagram of the first step of switching and reversing the working state of the system creation; [Figure 13] The state schematic diagram of the first step of switching to the reverse working state in the system creation; [Figure 14] Schematic diagram of the process of switching to the forward working state of the system creation; [Figure 15] A schematic diagram of the gas flow in the left half of the system in the forward rotation state; [Figure 16] Schematic diagram of the left half of the gas flow in the reverse state of this creation; [Figure 17] It is a schematic diagram of the structure of the lower half of the valve seat of this creation; [Figure 18] Schematic diagram of the lower half of the system creation button; [Figure 19] Schematic diagram of the cross-sectional structure of this creation in forward working state; [Fig. 20] The cross-sectional structural schematic diagram of switching to the reverse working state of the system creation; [Figure 21] Schematic diagram of the lower part of the case of this creation; [Figure 22] A schematic diagram of the right half of the gas flow in the forward rotation state of this creation; [Fig. 23] is a schematic diagram of gas flow in the right half of the reversed state; [Figure 24] The state diagram of the second step of switching and reversing the working state of the original creation; [Figure 25] The state schematic diagram of the third step of switching and reversing the working state of the system creation; [Figure 26] The state diagram of the second step of switching to the reverse working state in the system creation; [Figure 27] The state schematic diagram of the third step of switching to the reverse working state in the system creation; [Figure 28] The state schematic diagram of the fourth step of switching to the reverse working state in the system creation.

1: shell

2: Cylinder

3: Screw A

4: Gas valve seat sealing ring

5: Air valve seat

6: sealing ring A

7:Valve plug

8: Guide wheel A

9: Guide wheel B

10: E-type buckle

12: Screw B

13: Baffle

14: sealing ring B

15: button

16: return spring

17: Screw C

18: Motor group

19: Strike Group

Claims (10)

A device that uses a button to switch and lock the forward and reverse functions of a pneumatic wrench, including a housing, a cylinder, a screw A, a valve seat sealing ring, a valve seat, a sealing ring A, a valve plug, a guide wheel A, a guide wheel B, E-shaped buckle, solid pin, screw B, baffle, sealing ring B, button, return spring, screw C, characterized in that: the housing is provided with a motor room, an exhaust room, an air intake room, and an air intake room The mouth is provided with a seal ring groove A, and the bottom of the housing motor chamber is provided with a screw hole B, a baffle installation sink, a seal ring groove B, a through hole, a spring positioning sink, and a button installation square hole; the cylinder is placed in the motor In the group, the cylinder is provided with air groove A, air groove B, screw hole A, eccentric inner hole, exhaust hole, and arc grooves are arranged on both ends; the valve seat is provided with sealing ring groove C, air groove C, Air groove D, air intake hole, exhaust groove, air valve hole, screw through hole A, solid pin installation hole, the air valve seat sealing ring is placed in the sealing ring groove C, and the air valve seat is connected to the cylinder through screw A, so that The air groove C is always connected with the cylinder air groove A, the air groove D is always connected with the cylinder air groove B, and the air intake hole is always connected with the housing air intake chamber; the sealing ring A is placed in the housing sealing ring groove A, so that The air inlet chamber of the shell is in sealing communication with the air inlet hole of the valve seat; The air valve seat slides axially in the air valve hole; the outer circle of the guide wheel A is alternately provided with a rear stop guide groove with a certain inclination angle opening, a front stop guide groove with a certain inclination angle opening, a stop point of the front stop guide groove, Axis center hole A, the small end is provided with a card slot A; the outer circle of the guide wheel B is provided with a guiding groove with a certain inclination angle, a stop point of the guiding groove, and an axis through hole B, and the small end is provided with a card slot. Groove B; guide wheel B cooperates with guide wheel A and guide wheel A through card slot B, so that guide wheel A and guide wheel B form a guide wheel group, and the rear stop guide groove, front stop guide groove and guide rotation groove form a completed work The guide groove and the guide wheel set are installed on the shaft of the valve bolt guide wheel and can be rotated; the groove of the valve bolt buckle ring is equipped with an E-shaped buckle ring, which is used to limit the axial relative movement between the guide wheel set and the valve bolt, so that the guide wheel set Axial movement together with the valve plug; the solid pin is inserted into the solid pin mounting hole of the valve seat and placed in the working guide groove of the guide wheel group, restrained by the solid pin, the guide wheel group can only perform specific axial movement and rotation Movement; the sealing ring B and the baffle are placed in the casing sealing ring groove B and the baffle in turn, and the baffle is locked on the casing through the screw B; The through hole of the body penetrates into the square hole for the button installation of the casing, and the sealing ring B plays the role of isolating the compressed air in the motor room of the casing from leaking to the outside of the casing; the button is provided with a spring positioning shaft, a square hole, and a screw hole The square hole is matched with the square head of the valve bolt, and is locked by the screw C, so that the valve bolt and the key are connected as a whole. Rotation; the return spring is placed between the housing spring positioning sink platform and the button spring positioning shaft. As described in claim 1, a device that uses one button to switch and lock the forward and reverse functions of the pneumatic wrench, wherein the housing is provided with a motor chamber, an exhaust chamber, and an air intake chamber, and the mouth of the air intake chamber is provided with a sealing ring groove A. There are screw holes B, baffle mounting platform, sealing ring groove B, through hole, spring positioning platform, and button installation square hole under the motor chamber of the housing. As described in claim 1, a device that uses one button to switch and lock the forward and reverse functions of the pneumatic wrench, wherein the cylinder is placed in the motor group, and the cylinder is provided with air groove A, air groove B, screw hole A, and an eccentric inner hole , Exhaust holes, arc grooves are arranged on both ends. As described in claim 1, a device that uses a button to switch and lock the forward and reverse functions of the pneumatic wrench, wherein the air valve seat is provided with a sealing ring groove C, an air groove C, an air groove D, an air inlet, and an exhaust groove , air valve hole, screw through hole A, solid pin installation hole, the air valve seat sealing ring is placed in the sealing ring groove C to isolate the channeling between air groove C, air groove D and the outside world; the air valve seat passes through Screw A is connected to the cylinder so that the air groove C is always connected with the cylinder air groove A, the air groove D is always connected with the cylinder air groove B, and the air intake hole is always connected with the air intake chamber of the housing; the sealing ring A is placed on the housing sealing ring In the slot A, the air inlet chamber of the casing is sealed and communicated with the air inlet hole of the valve seat. As described in claim 1, a device that uses a button to switch and lock the forward and reverse functions of the pneumatic wrench, wherein the valve plug is provided with air grooves E, air grooves F, shaft shoulders, guide wheel shafts, buckle grooves, square heads, Screw hole C, the valve bolt can slide axially in the valve hole of the valve seat. As described in claim item 1, a device that uses a button to switch and lock the forward and reverse functions of the pneumatic wrench, wherein the outer circle of the guide wheel A is alternately provided with rear stop guide grooves with a certain inclination angle, and rear stop guide grooves with a certain inclination angle in the opening. The front stop guide groove, the stop point of the front stop guide groove, the shaft center through hole A, and the small end is provided with a card slot A. As described in claim item 1, a device that uses a key to switch and lock the forward and reverse functions of the pneumatic wrench, wherein the outer circle of the guide wheel B is provided with a guiding groove with a certain inclination angle, a stop point of the guiding groove, and an axis Through hole B, the small end is provided with card slot B; guide wheel B cooperates with guide wheel A card slot A through card slot B, so that guide wheel A and guide wheel B form a guide wheel group, rear stop guide groove, front stop guide groove The guide wheel set is installed on the guide wheel shaft of the valve pin and can rotate; the valve pin buckle ring groove is equipped with an E-shaped buckle ring, which is used to limit the axial direction between the guide wheel set and the valve pin The relative movement makes the guide wheel group move axially with the valve plug. As described in claim 1, a device that uses a button to switch and lock the forward and reverse functions of the pneumatic wrench, wherein the solid pin is inserted into the solid pin mounting hole of the air valve seat and placed in the working guide groove of the guide wheel group, and is controlled by the solid pin. Containment, the guide wheel group can only do specific axial movement and rotation movement. As described in claim 1, a device that uses a key to switch and lock the forward and reverse functions of the pneumatic wrench, wherein the key is provided with a spring positioning shaft, a square hole, and a screw sink platform, the square hole is matched with the square head of the valve bolt, and the screw C is locked so that the valve bolt and the key are connected in one body, and the key is installed in the square hole for installing the key of the housing, so that the valve bolt and the key can only move axially but cannot rotate axially. As described in claim item 1, a device that uses a button to switch and lock the forward and reverse functions of the pneumatic wrench, wherein the return spring is placed between the shell spring positioning sinker and the button spring positioning shaft to lock the front and back of the valve bolt The function of changing the working state and resetting the state.

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