CN114193383A

CN114193383A - Device for switching and locking forward and reverse rotation functions of pneumatic wrench by adopting one key

Info

Publication number: CN114193383A
Application number: CN202110810733.1A
Authority: CN
Inventors: 王祥录; 陈吉雄
Original assignee: Zhangzhou Nanfang Machinery Co ltd
Current assignee: Zhangzhou Nanfang Machinery Co ltd
Priority date: 2021-01-19
Filing date: 2021-07-19
Publication date: 2022-03-18
Also published as: CN112518650A; WO2022166318A1

Abstract

The invention discloses a device for switching and locking the forward and reverse rotation states of a pneumatic wrench by adopting a key, which comprises a shell, an air cylinder, a screw A, an air valve seat sealing ring, an air valve seat, a sealing ring A, an air valve bolt, a guide wheel A, a guide wheel B, E type snap ring, a solid pin, a screw B, a baffle, a sealing ring B, a key, a reset spring and a screw C; the casing is equipped with motor room, exhaust chamber, air inlet chamber, and air inlet chamber oral area is equipped with seal ring groove A, and casing motor room below is equipped with screw B, the heavy platform of baffle installation, seal ring groove B, through-hole, the heavy platform of spring location, button installation square hole. This adopt a button to switch and lock device of pneumatic wrench positive and negative rotation function, abandon traditional pneumatic wrench's rotation type, two key formula switching mode, but adopt a button switching pneumatic wrench positive and negative rotation of auto-lock state, realized the simplified operation.

Description

Device for switching and locking forward and reverse rotation functions of pneumatic wrench by adopting one key

Technical Field

The invention relates to the technical field of pneumatic wrenches, in particular to a device for switching and locking the forward and reverse rotation functions of a pneumatic wrench by adopting one key.

Background

The working principle of the pneumatic wrench is that compressed air enters the cylinder through the air closing mechanism, the speed regulating mechanism and the forward and reverse mechanism to push the blades to drive the rotor to rotate, so that the striking mechanism generates instantaneous high-energy alternating impact load, and the pneumatic wrench is widely applied to screw assembling and disassembling occasions such as assembly lines, maintenance places and the like due to large torque output and good use safety. The screw is assembled and disassembled by switching the forward and reverse rotation functions of the pneumatic wrench, so that the forward and reverse rotation functions of the pneumatic wrench are switched frequently.

The forward and reverse rotation switching of the traditional pneumatic wrench is generally divided into three types: the first type is realized by directly rotating the axial direction of the regulating valve, when the pneumatic wrench is switched to the forward rotation and the reverse rotation, an operator needs to operate by two hands, namely, the operator holds the pneumatic wrench by one hand and rotates the knob of the regulating valve by fingers of the other hand to realize the forward rotation and the reverse rotation of the pneumatic wrench. The second type is that the direct axial linear motion through the governing valve realizes, this kind of pneumatic wrench governing valve both ends always have the outstanding pneumatic wrench casing of one end, operating personnel realizes just reversing the switching through pressing the protruding end messenger pneumatic wrench governing valve axial motion, so this kind of pneumatic wrench switches the function of just reversing and is two keys formula, this two keys are located pneumatic wrench respectively before, back both ends or left and right both sides, careful analysis, because this kind of traditional pneumatic wrench's structure restriction, the both ends of governing valve have one section distance apart from holding the department, pneumatic wrench's just reversing is switched and is brought inconvenience for operating personnel. The third type is realized by indirectly pushing the regulating valve to axially rotate through two parallel keys positioned at the rear end of the pneumatic wrench, and the forward and reverse switching device of the pneumatic wrench adopts two keys to slightly show surplus, so that misoperation often occurs. In summary, the conventional pneumatic wrench brings inconvenience to the operator in functional switching, especially in forward and reverse switching.

Therefore, the traditional pneumatic wrench has the defect that operators who cannot operate without changing the holding posture and can not realize different handhabits can obtain the same operation hand feeling when switching the forward and reverse rotation functions.

Disclosure of Invention

The invention aims to provide a device for switching and locking the forward and reverse rotation functions of a pneumatic wrench by adopting a key so as to solve the problems in the prior art.

In order to achieve the purpose, the invention provides the following technical scheme: a device for switching and locking the forward and reverse rotation states of a pneumatic wrench by adopting a key comprises a shell, an air cylinder, a screw A, an air valve seat sealing ring, an air valve seat, a sealing ring A, an air valve bolt, a guide wheel A, a guide wheel B, E type snap ring, a solid pin, a screw B, a baffle, a sealing ring B, a key, a reset spring and a screw C; the shell is provided with a motor chamber, an exhaust chamber and an air inlet chamber, a sealing ring groove A is formed in the opening of the air inlet chamber, a screw hole B, a baffle plate installation sinking platform, a sealing ring groove B, a through hole, a spring positioning sinking platform and a key installation square hole are formed below the motor chamber of the shell; the cylinder is arranged in the motor group and is provided with an air groove A, an air groove B, a screw hole A, an eccentric inner hole and an exhaust hole, and arc grooves are formed in two end surfaces; the air valve seat is provided with a sealing ring groove C, an air groove D, an air inlet hole, an exhaust groove, an air valve hole, a screw through hole A and a solid pin mounting hole, the air valve seat sealing ring is arranged in the sealing ring groove C, the air valve seat is connected with the air cylinder through the screw A, the air groove C is always communicated with the air groove A of the air cylinder, the air groove D is always communicated with the air groove B of the air cylinder, and the air inlet hole is always communicated with the air inlet chamber of the shell; the sealing ring A is arranged in the sealing ring groove A of the shell, so that the air inlet chamber of the shell is communicated with the air inlet hole of the air valve seat in a sealing way; the air valve bolt is provided with an air groove E, an air groove F, a shaft shoulder, a guide wheel shaft, a buckling ring groove, a square head and a screw hole C, and can axially slide in the air valve hole of the air valve seat; the outer circle of the guide wheel A is alternately provided with a rear stop guide groove with a certain inclination angle at the opening, a front stop guide groove stop point and an axle center through hole A, and the small end of the guide wheel A is provided with a clamping groove A; the outer circle of the guide wheel B is provided with a rotation guide groove with an opening with a certain inclination angle, a rotation guide groove stop point and an axis through hole B, and the small end of the rotation guide groove B is provided with a clamping groove B; the guide wheel B is matched with the clamping groove A of the guide wheel A through the clamping groove B, so that the guide wheel A and the guide wheel B form a guide wheel set, the rear stop guide groove, the front stop guide groove and the rotation guide groove form a finished working guide groove, and the guide wheel set is arranged on a guide wheel shaft of the valve bolt and can rotate; the valve bolt fastening ring groove is provided with an E-shaped fastening ring which is used for limiting the axial relative movement of the guide wheel set and the valve bolt so that the guide wheel set and the valve bolt move axially together; the solid pin is inserted into the gas valve seat solid pin mounting hole and is arranged in the guide wheel set working guide groove, and the guide wheel set can only do specific axial movement and autorotation movement under the control of the solid pin; the sealing ring B and the baffle are sequentially arranged in the sealing ring groove B of the shell and the baffle mounting sinking platform, and the baffle is locked on the shell through a screw B; the valve bolt guide wheel shaft penetrates out of the inner hole of the sealing ring B and the shell through hole to the shell key mounting square hole, and the sealing ring B plays a role in isolating compressed air in the shell motor chamber from leaking to the outside of the shell; the key is provided with a spring positioning shaft, a square hole and a screw hole sunk platform, the square hole is matched with the square head of the valve bolt and locked by a screw C, so that the valve bolt and the key are connected into a whole, and the key is arranged in the key installation square hole of the shell to limit the axial movement of the valve bolt and the key but not the axial rotation; the reset spring is arranged between the shell spring positioning sinking platform and the key spring positioning shaft and plays roles in locking the positive and negative rotation working state of the valve bolt and resetting the state; when the key is pressed by external force, the key pushes the valve bolt, the E-shaped retaining ring and the guide wheel set to move axially against the reset spring, when a guide rotation groove of a guide wheel B in the guide wheel set contacts with the solid pin, the guide wheel set automatically rotates to avoid the solid pin, and finally a guide rotation groove stop point of the guide wheel B is clamped on the solid pin; when the key is pressed by external force again, the key pushes the valve bolt, the E-shaped retaining ring and the guide wheel set to move axially against the reset spring, when the guide groove of the guide wheel B in the guide wheel set contacts the solid pin, the guide wheel set automatically rotates to avoid the solid pin, finally, the guide groove stop point of the guide wheel B is clamped on the solid pin, the external force of the key is released, under the action of the reset spring, the valve bolt, the guide wheel set, the E-shaped retaining ring and the key start to move axially in a reset mode, when the rear stop guide groove of the guide wheel A in the guide wheel set contacts the solid pin, the guide wheel set automatically rotates to avoid the solid pin, finally, the shaft shoulder of the valve bolt is clamped on the solid pin, at the moment, the valve bolt air groove E is communicated with the air inlet hole and the air groove C of the valve seat, and the valve bolt air groove F is communicated with the air groove D and the air groove of the valve seat, so that the pneumatic wrench is switched to a forward working state. Namely, the external force is released after the key is pressed to the bottom every time, and the pneumatic wrench can realize the switching and locking of the working states of forward rotation and reverse rotation.

Preferably, the shell is provided with a motor chamber, an exhaust chamber and an air inlet chamber, a sealing ring groove A is formed in the opening of the air inlet chamber, and a screw hole B, a baffle installation sinking platform, a sealing ring groove B, a through hole, a spring positioning sinking platform and a key installation square hole are formed in the lower portion of the motor chamber of the shell.

Preferably, the cylinder is arranged in the motor group and is provided with an air groove A, an air groove B, a screw hole A, an eccentric inner hole and an exhaust hole, and two end faces are provided with arc grooves.

Preferably, the air valve seat is provided with a sealing ring groove C, an air groove D, an air inlet, an exhaust groove, an air valve hole, a screw through hole A and a solid pin mounting hole, and the air valve seat sealing ring is arranged in the sealing ring groove C to isolate channeling among the air groove C, the air groove D and the outside; the air valve seat is connected with the air cylinder through a screw A, so that the air groove C is always communicated with the air groove A of the air cylinder, the air groove D is always communicated with the air groove B of the air cylinder, and the air inlet hole is always communicated with the air inlet chamber of the shell; the sealing ring A is arranged in the sealing ring groove A of the shell, so that the air inlet chamber of the shell is communicated with the air inlet hole of the air valve seat in a sealing way.

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

Preferably, the excircle of the guide wheel A is alternately provided with a rear guide groove with a certain inclination angle at the opening, a front guide groove stop point, an axle center through hole A, and a clamping groove A at the small end.

Preferably, the excircle of the guide wheel B is provided with a rotation guide groove with a certain inclination angle at the opening, a rotation guide groove stop point and an axis through hole B, and the small end of the rotation guide groove B is provided with a clamping groove B; the guide wheel B is matched with the clamping groove A of the guide wheel A through the clamping groove B, so that the guide wheel A and the guide wheel B form a guide wheel set, the rear stop guide groove, the front stop guide groove and the rotation guide groove form a finished working guide groove, and the guide wheel set is arranged on a guide wheel shaft of the valve bolt and can rotate; the valve bolt fastening ring groove is provided with an E-shaped fastening ring which is used for limiting the axial relative movement of the guide wheel set and the valve bolt so that the guide wheel set and the valve bolt move axially together.

Preferably, the solid pin is inserted into the mounting hole of the solid pin of the air valve seat and is arranged in the working guide groove of the guide wheel set, and the guide wheel set can only do specific axial movement and autorotation movement under the control of the solid pin.

Preferably, the button is provided with a spring positioning shaft, a square hole and a screw sinking platform, the square hole is matched with the square head of the valve bolt and locked by a screw C, so that the valve bolt and the button are connected into a whole, and the button is arranged in the button mounting square hole of the shell to limit axial movement and axial rotation of the valve bolt and the button.

Preferably, the reset spring is arranged between the shell spring positioning sinking platform and the key spring positioning shaft, and plays roles in locking the positive and negative rotation working state of the valve bolt and resetting the state.

Compared with the prior art, the invention has the beneficial effects that: the device for switching and locking the forward and reverse rotation functions of the pneumatic wrench by one key is adopted, the forward and reverse rotation switching device abandons the rotary type and two-key type switching mode of the traditional pneumatic wrench, and the forward and reverse rotation of the pneumatic wrench is switched by one key in a self-locking state, so that the simplified operation is realized; the forward and reverse switching device can not remove the holding hand when the pneumatic wrench is operated to switch forward and reverse, and can ensure that operators with different handedness can obtain the same operation hand feeling, thereby reducing the occurrence of misoperation.

Drawings

FIG. 1 is a schematic exploded view of the present invention

FIG. 2 is a schematic exploded view of the present invention

FIG. 3 is a schematic view of the upper half of the housing

FIG. 4 is a schematic view of a cylinder structure

FIG. 5 is a schematic view of the upper half of the air valve seat

FIG. 6 is a schematic view of the valve plug structure

FIG. 7 is a schematic view of the structure of introduction A

FIG. 8 is a schematic view of the structure of introduction B

FIG. 9 is a schematic view of the upper part of the key

FIG. 10 is a partial schematic view of the present invention

FIG. 11 is a schematic view of the forward rotation operation state of the present invention

FIG. 12 is a schematic diagram of the first step of switching the reverse operation status according to the present invention

FIG. 13 is a state diagram illustrating a first step of switching to a reverse operation state according to the present invention

FIG. 14 is a schematic diagram illustrating a process of switching a forward working state according to the present invention

FIG. 15 is a schematic view of gas flow in the left half of a forward rotation state

FIG. 16 is a schematic view of the left half gas flow in the inverted state

FIG. 17 is a schematic view of the lower half of the air valve seat

FIG. 18 is a schematic view of the lower half of the key

FIG. 19 is a schematic sectional view showing the normal rotation operation state

FIG. 20 is a schematic cross-sectional view illustrating the operation of the present invention in reverse

FIG. 21 is a schematic view of the lower half of the housing

FIG. 22 is a schematic view of the gas flow in the right half of the normal rotation state

FIG. 23 is a schematic view of the gas flow in the right half of the inverted state

FIG. 24 is a diagram illustrating the second step of switching the reverse operation state according to the present invention

FIG. 25 is a state diagram of the third step of switching the reverse operation state according to the present invention

FIG. 26 is a state diagram of the second step of switching to the reverse operating state in accordance with the present invention

FIG. 27 is a state diagram of the third step of switching to the reverse operation state in accordance with the present invention

FIG. 28 is a state diagram illustrating the fourth step of switching to the reverse operation state according to the present invention.

In the figure: 1-1 casing 1-1 motor chamber 1-2 exhaust chamber 1-3 air inlet chamber 1-4 sealing ring groove A1-5 screw hole B1-6 baffle installation sinking platform 1-7 sealing ring groove B1-8 through hole 1-9 spring positioning sinking platform 1-10 key installation square hole 2 cylinder 2-1 air groove A2-2 air groove B2-3 screw hole A2-4 eccentric inner hole 2-5 exhaust hole 2-6 circular arc groove 3 screw A4 air valve seat sealing ring 5 air valve seat 5-1 sealing ring groove C5-2 air groove C5-3 air groove D5-4 air inlet hole 5-5 exhaust groove 5-6 air valve hole 5-7 screw through hole A5-8 solid pin mounting hole 6 sealing ring A7 air valve bolt 8 guide wheel A8-1 rear stop guide groove 8-2 front stop guide groove 8-3 front stop guide groove dead point 8-4 axial through hole A8-5 neck A9 guide wheel B9-1 rotation guide groove 9-2 rotation guide groove dead point 9-3 axial through hole B9-4 neck B10E type retaining ring 11 solid pin 12 screw B13 baffle plate 14 sealing ring B15 key 15-1 spring positioning shaft 15-2 square hole 15-3 screw hole sinking platform 16 return spring 17 screw C18 motor group 19 striking group 20 guide wheel group.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The invention provides a technical scheme that: a device for switching and locking the forward and reverse rotation states of a pneumatic wrench by adopting one key comprises a shell 1, an air cylinder 2, a screw A3, an air valve seat sealing ring 4, an air valve seat 5, a sealing ring A6, a valve cock 7, a guide wheel A8, a guide wheel B9, an E-shaped retaining ring 10, a solid pin 11, a screw B12, a baffle 13, a sealing ring B14, a key 15, a reset spring 16 and a screw C17; the shell 1 is provided with a motor chamber 1-1, an exhaust chamber 1-2 and an air inlet chamber 1-3, the opening part of the air inlet chamber 1-3 is provided with a sealing ring groove A1-4, a screw hole B1-5 is arranged below the motor chamber 1-1 of the shell 1, a baffle mounting sinking platform 1-6, a sealing ring groove B1-7, a through hole 1-8, a spring positioning sinking platform 1-9 and a key mounting square hole 1-10; the cylinder 2 is arranged in the motor group 18, 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, and two end faces are provided with arc grooves 2-6; the air valve seat 5 is provided with a sealing ring groove C5-1, an air groove C5-2, an air groove D5-3, an air inlet hole 5-4, an exhaust groove 5-5, an air valve hole 5-6, a screw through hole A5-7 and a solid pin mounting hole 5-8, the air valve seat sealing ring 4 is arranged in the sealing ring groove C5-1, the air valve seat 5 is connected with the cylinder 2 through a screw A3, so that the air groove C5-2 is always communicated with the air groove A2-1 of the cylinder 2, the air groove D5-3 is always communicated with the air groove B2-2 of the cylinder 2, and the air inlet hole 5-4 is always communicated with the air inlet chamber 1-3 of the shell 1; the sealing ring A6 is arranged in a sealing ring groove A1-4 of the shell 1, so that an air inlet chamber 1-3 of the shell 1 is hermetically communicated with an air inlet hole 5-4 of the air valve seat 5; the valve plug 7 is provided with an air groove E7-1, an air groove F7-2, a shaft shoulder 7-3, a guide wheel shaft 7-4, a snap ring groove 7-5, a square head 7-6 and a screw hole C7-7, and the valve plug 7 can axially slide in an air valve hole 5-6 of the valve seat 5; the excircle of the guide wheel A8 is alternately provided with a rear stop guide groove 8-1 with a certain inclination angle at the opening, a front stop guide groove 8-2 with a certain inclination angle at the opening, a front stop guide groove stop 8-3 and an axle center through hole A8-4, and the small end is provided with a clamping groove A8-5; the excircle of the guide wheel B9 is provided with a rotation guide groove 9-1 with a certain inclination angle at the opening, a rotation guide groove stop point 9-2, an axle center through hole B9-3, and a clamping groove B9-4 at the small end; the guide wheel B9 is matched with the guide wheel A8 through a clamping groove B9-4 and a clamping groove A8-5, so that the guide wheel A8 and the guide wheel B9 form a guide wheel set 20, a rear stop guide groove 8-1, a front stop guide groove 8-2 and a rotary guide groove 9-1 form a finished working guide groove, and the guide wheel set 20 is arranged on a guide wheel shaft 7-4 of the valve bolt 7 and can rotate; the valve bolt 7 is provided with an E-shaped retaining ring 10 in a retaining ring groove 7-5, and the E-shaped retaining ring is used for limiting 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; the solid pin 11 is inserted into the solid pin mounting hole 5-8 of the air valve seat 5 and is arranged in the working guide groove of the guide wheel set 20, and the guide wheel set 20 can only do specific axial movement and self-rotation movement under the control of the solid pin 11; the sealing ring B14 and the baffle 13 are sequentially arranged in a sealing ring groove B1-7 of the shell 1 and a baffle mounting sinking platform 1-6, and the baffle 13 is locked on the shell 1 through a screw B12; the guide wheel shaft 7-4 of the valve bolt 7 penetrates out of an inner hole of a sealing ring B14 and a through hole 1-8 of the shell 1 to a key installation square hole 1-10 of the shell 1, and the sealing ring B14 plays a role in isolating compressed air in a motor chamber 1-1 of the shell 1 from leaking to the outside of the shell 1; the key 15 is provided with a spring positioning shaft 15-1, a square hole 15-2 and a screw hole sunk platform 15-3, the square hole 15-2 is matched with a square head 7-6 of the valve bolt 7 and is locked by a screw C17, so that the valve bolt 7 and the key 15 are connected into a whole, the key 15 is arranged in the key installation square hole 1-10 of the shell 1, and the valve bolt 7 and the key 15 are limited to only move axially but not rotate axially; the reset spring 16 is arranged between the spring positioning sinking platform 1-9 of the shell 1 and the spring positioning shaft 15-1 of the key 15, and plays a role in locking the positive and negative rotation working state and state reset of the valve bolt 7; when the key 15 is pressed by external force, the key 15 pushes the valve bolt 7, the E-shaped retaining ring 10 and the guide wheel set 20 to move axially against the return spring 16, when the guide groove 9-1 of the guide wheel B9 in the guide wheel set 20 contacts the solid pin 11, the guide wheel set 20 automatically rotates to avoid the solid pin 11, finally the guide groove stop 9-2 of the guide wheel B9 is clamped on the solid pin 11, at the moment, the external force of the key 15 is released, under the action of the return spring 16, the valve bolt 7, the guide wheel set 20, the E-shaped retaining ring 10 and the key 15 start to do axial return movement, when the front stop guide groove 8-2 of the guide wheel A8 in the guide wheel set 20 contacts the solid pin 11, the guide wheel set 20 automatically rotates to avoid the solid pin 11, finally the front stop guide groove 8-3 of the guide wheel A8 is clamped on the solid pin 11, at the moment, the air groove F7-2 of the valve bolt 7 is communicated with the air inlet hole 5-4 and the air groove D5-3 of the air valve seat 5, the air groove E7-1 of the air valve bolt 7 is communicated with the air groove C5-2 of the air valve seat 5 and the exhaust chamber 1-2 of the shell 1, so that the pneumatic wrench is switched to a reverse working state; when the key 15 is pressed by external force again, the key 15 pushes the valve bolt 7, the E-shaped retaining ring 10 and the guide wheel set 20 to overcome the axial movement of the return spring 16, when the guide groove 9-1 of the guide wheel B9 in the guide wheel set 20 contacts the solid pin 11, the guide wheel set 20 automatically rotates to avoid the solid pin 11, finally the guide groove stop 9-2 of the guide wheel B9 is clamped on the solid pin 11, the external force of the key 15 is released at the moment, under the action of the return spring 16, the valve bolt 7, the guide wheel set 20, the E-shaped retaining ring 10 and the key 15 start to axially return, when the rear stop guide groove 8-1 of the guide wheel A8 in the guide wheel set 20 contacts the solid pin 11, the guide wheel set 20 automatically rotates to avoid the solid pin 11, finally the shaft shoulder 7-3 of the valve bolt 7 is clamped on the solid pin 11, at the moment, the air groove E7-1 of the valve bolt 7 is communicated with the air inlet hole 5-4 and the air groove C5-2 of the air valve seat 5, the air groove F7-2 of the air valve bolt 7 is communicated with the air groove D5-3 of the air valve seat 5 and the air exhaust groove 5-5, so that the pneumatic wrench is switched to a forward rotation working state. That is, the key 15 is pressed to the bottom by external force each time and then released, and the pneumatic wrench can realize the switching and locking of the working states of forward rotation and reverse rotation.

As shown in figures 1 and 3, a shell 1 is provided with a motor chamber 1-1, an exhaust chamber 1-2 and an air inlet chamber 1-3, a sealing ring groove A1-4 is arranged at the opening part of the air inlet chamber 1-3, a screw hole B1-5, a baffle installation sinking platform 1-6, a sealing ring groove B1-7, a through hole 1-8, a spring positioning sinking platform 1-9 and a key installation square hole 1-10 are arranged below the motor chamber 1-1 of the shell 1.

As shown in figure 4, the cylinder 2 is arranged in the motor group 18, 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, and two end faces are provided with arc grooves 2-6.

As shown in fig. 1, 4 and 5, the air valve seat 5 is provided with a sealing ring groove C5-1, an air groove C5-2, an air groove D5-3, an air inlet hole 5-4, an air exhaust groove 5-5, an air valve hole 5-6, a screw through hole a5-7 and a solid pin mounting hole 5-8, the air valve seat sealing ring 4 is arranged in the sealing ring groove C5-1 to isolate the channeling among the air groove C5-2, the air groove D5-3 and the outside; the air valve seat 5 is connected with the air cylinder 2 through a screw A3, so that the air groove C5-2 is always communicated with the air groove A2-1 of the air cylinder 2, the air groove D5-3 is always communicated with the air groove B2-2 of the air cylinder 2, and the air inlet hole 5-4 is always communicated with the air inlet chamber 1-3 of the shell 1; the sealing ring A6 is arranged in a sealing ring groove A1-4 of the shell 1, so that the air inlet chamber 1-3 of the shell 1 is communicated with the air inlet hole 5-4 of the air valve seat 5 in a sealing way.

As shown in figures 5 and 6, the valve plug 7 is provided with an air groove E7-1, an air groove F7-2, a shaft shoulder 7-3, a guide wheel shaft 7-4, a snap ring groove 7-5, a square head 7-6 and a screw hole C7-7, and the valve plug 7 can axially slide in an air valve hole 5-6 of the air valve seat 5.

As shown in fig. 7, the outer circle of the guide wheel A8 is alternately provided with a rear stop guide groove 8-1 with an opening having a certain inclination angle, a front stop guide groove 8-2 with an opening having a certain inclination angle, a front stop guide groove stop 8-3 and an axle center through hole A8-4, and the small end is provided with a clamping groove A8-5.

As shown in fig. 7, 8 and 10, the outer circle of the guide wheel B9 is provided with a guide rotation groove 9-1 with an opening having a certain inclination angle, a guide rotation groove stop 9-2, an axis through hole B9-3, and a small end is provided with a clamping groove B9-4; the guide wheel B9 is matched with the guide wheel A8 through a clamping groove B9-4 and a clamping groove A8-5, so that the guide wheel A8 and the guide wheel B9 form a guide wheel set 20, a rear stop guide groove 8-1, a front stop guide groove 8-2 and a rotary guide groove 9-1 form a finished working guide groove, and the guide wheel set 20 is arranged on a guide wheel shaft 7-4 of the valve bolt 7 and can rotate; the valve bolt 7 is provided with an E-shaped retaining ring 10 in the retaining ring groove 7-5 for limiting the relative axial 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 fig. 10, the solid pin 11 is inserted into the solid pin mounting hole 5-8 of the air valve seat 5 and is arranged in the working guide groove of the guide wheel set 20, and the guide wheel set 20 can only do specific axial movement and self-rotation movement under the control of the solid pin 11.

As shown in fig. 9 to 10, the key 15 is provided with a spring positioning shaft 15-1, a square hole 15-2 and a screw sinking platform, the square hole 15-2 is matched with the square head 7-6 of the valve bolt 7 and locked by a screw C17, so that the valve bolt 7 and the key 15 are connected into a whole, the key 15 is installed in the key installation square hole 1-10 of the shell 1, and the valve bolt 7 and the key 15 are limited to move axially but not rotate axially.

As shown in fig. 10, the return spring 16 is disposed between the spring positioning platform 1-9 of the housing 1 and the spring positioning shaft 15-1 of the push button 15, and plays a role in locking the forward and reverse rotation working state and state return of the valve bolt 7.

As shown in fig. 11 to 14, the following explains the forward/reverse switching principle of the device for switching and locking the forward/reverse rotation state of the air wrench by using one key according to the present invention:

in a forward rotation state, under the action of a return spring 16, a shaft shoulder 7-3 of the valve plug 7 is clamped on the solid pin 11, at the moment, an air groove E7-1 of the valve plug 7 is communicated with an air inlet hole 5-4 and an air groove C5-2 of the air valve seat 5, an air groove F7-2 of the valve plug 7 is communicated with an air groove D5-3 and an air exhaust groove 5-5 of the air valve seat 5, at the moment, the valve plug is in a forward rotation working state, and air is fed by a pneumatic wrench to work in a forward rotation mode.

In a reverse rotation state, when the key 15 is pressed by external force, the key 15 pushes the valve bolt 7, the E-shaped retaining ring 10 and the guide wheel set 20 to axially move against the return spring 16, when the rotation guide groove 9-1 of the guide wheel B9 in the guide wheel set 20 contacts the solid pin 11, the guide wheel set 20 automatically rotates to avoid the solid pin 11, finally the rotation guide groove stop 9-2 of the guide wheel B9 is clamped on the solid pin 11, at the moment, the external force of the key 15 is released, under the action of the return spring 16, the valve bolt 7, the guide wheel set 20, the E-shaped retaining ring 10 and the key 15 start to axially return, when the front stop guide groove 8-2 of the guide wheel A8 in the guide wheel set 20 contacts the solid pin 11, the guide wheel set 20 automatically rotates to avoid the solid pin 11, finally the front stop guide groove 8-3 of the guide wheel A8 is clamped on the solid pin 11, at the moment, the air groove F7-2 of the valve bolt 7 is communicated with the air inlet hole 5-4 and the air groove D5-3 of the air valve seat 5, the air groove E7-1 of the air valve bolt 7 is communicated with the air groove C5-2 of the air valve seat 5 and the exhaust chamber 1-2 of the shell 1, and the reverse working state is switched at the moment, and the air intake of the air wrench is carried out to rotate reversely.

The forward rotation state is recovered, when the key 15 is pressed by external force again, the key 15 pushes the valve bolt 7, the E-shaped retaining ring 10 and the guide wheel set 20 to move axially against the return spring 16, when the rotation guide groove 9-1 of the guide wheel B9 in the guide wheel set 20 contacts the solid pin 11, the guide wheel set 20 automatically rotates to avoid the solid pin 11, finally the rotation guide groove stop 9-2 of the guide wheel B9 is clamped on the solid pin 11, at the moment, the external force of the key 15 is released, under the action of the return spring 16, the valve bolt 7, the guide wheel set 20, the E-shaped retaining ring 10 and the key 15 start to move axially, when the rear stop guide groove 8-1 of the guide wheel A8 in the guide wheel set 20 contacts the solid pin 11, the guide wheel set 20 automatically rotates to avoid the solid pin 11, finally the shaft shoulder 7-3 of the valve bolt 7 is clamped on the solid pin 11, at the moment, the air groove E7-1 of the valve bolt 7 is communicated with the air inlet hole 5-4 and the air groove C5-2 of the air valve seat 5, the air groove F7-2 of the valve bolt 7 is communicated with the air groove D5-3 of the air valve seat 5 and the air exhaust groove 5-5, at the moment, the valve bolt is switched to a forward rotation working state, and the air intake of the pneumatic wrench enables the air wrench to work in the forward rotation.

As shown in fig. 15 to 16, the following is a description of the gas flow when the device of the present invention is operated to switch and lock the forward and reverse rotation of the air wrench by using one key:

in the air inlet process in the positive rotation working state, when the pneumatic wrench is connected with an air source and the switch is opened, compressed air enters the air inlet chamber 1-3 of the shell 1 and enters the air tank A2-1 of the cylinder 2 of the motor group 18 through the air inlet 5-4 of the air valve seat 5, the air groove E7-1 of the air valve bolt 7, the air groove C5-2 of the air valve seat 5 and the air groove A2-1 of the motor group 18, so that the motor group 18 rotates clockwise to drive the striking group 19 to rotate clockwise.

The positive rotation working state exhaust process is divided into two parts:

part of the waste gas is discharged from the exhaust holes 2-5 of the cylinders 2 of the motor group 18 and is exhausted outside through the exhaust chamber 1-2 of the shell 1.

The rest waste gas is discharged from an air groove B2-2 of the cylinder 2 of the motor group 18, enters an exhaust chamber 1-2 of the shell 1 through an air groove D5-3 of the air valve seat 5, an air groove F7-2 of the valve cock 7 and an exhaust groove 5-5 of the air valve seat 5 and is discharged to the outside.

Compressed air continuously flows through the path, so that the pneumatic wrench can continuously rotate clockwise, and if the reversing operation is required to be switched, the working state can be switched by pressing the key 15.

And in the process of air inlet in the reverse working state, when the pneumatic wrench is connected with an air source and the switch is opened, compressed air enters the air inlet chamber 1-3 of the shell 1 and enters the air groove B2-2 of the cylinder 2 of the motor group 18 through the air inlet 5-4 of the air valve seat 5, the air groove F7-2 of the valve bolt 7, the air groove D5-3 of the air valve seat 5 and the air groove B of the motor group 18, so that the motor group 18 rotates anticlockwise to drive the striking group 19 to rotate anticlockwise.

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

part of the waste gas is discharged from the exhaust holes 2-5 of the cylinders 2 of the motor group 18 and is discharged outside through the exhaust chamber 1-2 of the shell 1.

And the rest waste gas is discharged from an air groove A2-1 of the cylinder 2 of the motor group 18, enters an exhaust chamber 1-2 of the shell 1 through an air groove C5-2 of the air valve seat 5, an air groove E7-1 of the valve plug 7 and an air valve hole 5-6 of the air valve seat 5 and is discharged to the outside.

Compressed air continuously flows through the path, so that the continuous anticlockwise rotation work of the pneumatic wrench can be realized, if the reverse rotation work needs to be switched, the working state can be switched only by pressing the key 15.

The working principle is as follows: for the device adopting a key to switch and lock the forward and reverse rotation functions of the pneumatic wrench, in the forward rotation state, under the action of a return spring, a valve bolt shaft shoulder is clamped on a solid pin, at the moment, a valve bolt air groove E is communicated with an air inlet hole and an air groove C of an air valve seat, a valve bolt air groove F is communicated with an air groove D of the air valve seat and an air exhaust groove, at the moment, in the forward rotation working state, the pneumatic wrench is used for feeding air to work in the forward rotation;

in a reverse state, when an external force presses the key, the key pushes the valve bolt, the E-shaped retaining ring and the guide wheel group to overcome the axial movement of the reset spring, when the guiding rotary groove of the guiding wheel B in the guiding wheel set contacts the solid pin, the guiding wheel set automatically rotates to avoid the solid pin, finally the guiding rotary groove stop point of the guiding wheel B is clamped on the solid pin, at this time, the external force of the key is released, under the action of the reset spring, the valve bolt, the guide wheel set, the E-shaped retaining ring and the key start to perform axial reset motion, when the front guide groove of the guide wheel A in the guide wheel set contacts the solid pin, the guide wheel set automatically rotates to avoid the solid pin, and finally the front guide groove stop point of the guide wheel A is clamped on the solid pin, the valve bolt air groove F is communicated with an air inlet hole and an air groove D of the air valve seat, the valve bolt air groove E is communicated with an air groove C of the air valve seat and an exhaust chamber of the shell, the reverse working state is switched at the moment, and the air is fed by the pneumatic wrench to reversely work;

the forward rotation state is recovered, when the key is pressed by external force again, the key pushes the valve bolt, the E-shaped retaining ring and the guide wheel group to overcome the axial movement of the reset spring, when the guiding rotary groove of the guiding wheel B in the guiding wheel set contacts the solid pin, the guiding wheel set automatically rotates to avoid the solid pin, finally the guiding rotary groove stop point of the guiding wheel B is clamped on the solid pin, at this time, the external force of the key is released, under the action of the reset spring, the valve bolt, the guide wheel set, the E-shaped retaining ring and the key start to perform axial reset motion, when the rear stop guide groove of the guide wheel A in the guide wheel set contacts the solid pin, the guide wheel set automatically rotates to avoid the solid pin, finally the valve bolt shaft shoulder is clamped on the solid pin, the valve bolt air groove E is communicated with an air inlet hole and an air groove C of the air valve seat, the valve bolt air groove F is communicated with an air groove D of the air valve seat and an air exhaust groove, the forward rotation working state is switched, and the forward rotation work is carried out by air intake of the pneumatic wrench.

The following is a description of the gas flow during operation of the device for switching and locking the forward and reverse rotation states of the pneumatic wrench by one key of the invention:

in the air inlet process in the positive rotation working state, after the pneumatic wrench is connected with an air source and the switch is opened, compressed air enters the shell air inlet chamber, passes through the air inlet hole of the air valve seat, the air valve bolt air groove E, the air valve seat air groove C and enters the air groove A of the air cylinder of the motor group, so that the motor group rotates clockwise to drive the striking group to rotate clockwise.

The positive rotation working state exhaust process is divided into two parts:

and part of waste gas is exhausted from the exhaust holes of the cylinders of the motor group and is exhausted outside through the exhaust chamber of the shell.

And the rest waste gas is discharged from the air groove B of the motor group cylinder, enters the shell exhaust chamber through the air groove D of the air valve seat, the air groove F of the air valve bolt and the air groove of the air valve seat and is discharged outside.

Compressed air continuously flows through the path, so that the pneumatic wrench can continuously rotate clockwise, and if the reversing operation is required to be switched, the working state is switched by pressing the key.

The process of working state air inlet is reversed, after the pneumatic wrench is connected with the air source and the switch is opened, compressed air enters the shell air inlet chamber, passes through the air valve seat air inlet hole, the air valve bolt air groove F, the air valve seat air groove D and enters the motor group air cylinder air groove B, so that the motor group rotates anticlockwise to drive the striking group to rotate anticlockwise.

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

And the rest waste gas is discharged from the air groove A of the motor group cylinder, enters the shell exhaust chamber through the air groove C of the air valve seat, the air groove E of the air valve bolt and the air valve hole of the air valve seat and is discharged outside.

Compressed air continuously flows through the path, so that the continuous anticlockwise rotation work of the pneumatic wrench can be realized, if the reverse rotation work needs to be switched, the working state can be switched by only pressing the key.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides an adopt a button to switch and lock device of pneumatic spanner function of just reversing, includes casing, cylinder, screw A, air valve seat sealing washer, air valve seat, sealing washer A, air valve bolt, guide pulley A, guide pulley B, E type buckle, solid round pin, screw B, baffle, sealing washer B, button, reset spring, screw C, its characterized in that: the shell is provided with a motor chamber, an exhaust chamber and an air inlet chamber, a sealing ring groove A is formed in the opening of the air inlet chamber, a screw hole B, a baffle plate installation sinking platform, a sealing ring groove B, a through hole, a spring positioning sinking platform and a key installation square hole are formed below the motor chamber of the shell; the cylinder is arranged in the motor group and is provided with an air groove A, an air groove B, a screw hole A, an eccentric inner hole and an exhaust hole, and arc grooves are formed in two end surfaces; the air valve seat is provided with a sealing ring groove C, an air groove D, an air inlet hole, an exhaust groove, an air valve hole, a screw through hole A and a solid pin mounting hole, the air valve seat sealing ring is arranged in the sealing ring groove C, the air valve seat is connected with the air cylinder through the screw A, the air groove C is always communicated with the air groove A of the air cylinder, the air groove D is always communicated with the air groove B of the air cylinder, and the air inlet hole is always communicated with the air inlet chamber of the shell; the sealing ring A is arranged in the sealing ring groove A of the shell, so that the air inlet chamber of the shell is communicated with the air inlet hole of the air valve seat in a sealing way; the air valve bolt is provided with an air groove E, an air groove F, a shaft shoulder, a guide wheel shaft, a buckling ring groove, a square head and a screw hole C, and can axially slide in the air valve hole of the air valve seat; the outer circle of the guide wheel A is alternately provided with a rear stop guide groove with a certain inclination angle at the opening, a front stop guide groove stop point and an axle center through hole A, and the small end of the guide wheel A is provided with a clamping groove A; the outer circle of the guide wheel B is provided with a rotation guide groove with an opening with a certain inclination angle, a rotation guide groove stop point and an axis through hole B, and the small end of the rotation guide groove B is provided with a clamping groove B; the guide wheel B is matched with the clamping groove A of the guide wheel A through the clamping groove B, so that the guide wheel A and the guide wheel B form a guide wheel set, the rear stop guide groove, the front stop guide groove and the rotation guide groove form a finished working guide groove, and the guide wheel set is arranged on a guide wheel shaft of the valve bolt and can rotate; the valve bolt fastening ring groove is provided with an E-shaped fastening ring which is used for limiting the axial relative movement of the guide wheel set and the valve bolt so that the guide wheel set and the valve bolt move axially together; the solid pin is inserted into the gas valve seat solid pin mounting hole and is arranged in the guide wheel set working guide groove, and the guide wheel set can only do specific axial movement and autorotation movement under the control of the solid pin; the sealing ring B and the baffle are sequentially arranged in the sealing ring groove B of the shell and the baffle mounting sinking platform, and the baffle is locked on the shell through a screw B; the valve bolt guide wheel shaft penetrates out of the inner hole of the sealing ring B and the shell through hole to the shell key mounting square hole, and the sealing ring B plays a role in isolating compressed air in the shell motor chamber from leaking to the outside of the shell; the key is provided with a spring positioning shaft, a square hole and a screw hole sunk platform, the square hole is matched with the square head of the valve bolt and locked by a screw C, so that the valve bolt and the key are connected into a whole, and the key is arranged in the key installation square hole of the shell to limit the axial movement of the valve bolt and the key but not the axial rotation; the reset spring is arranged between the shell spring positioning sinking platform and the key spring positioning shaft.

2. The device for switching and locking the forward and reverse rotation functions of the pneumatic wrench by using one key as claimed in claim 1, wherein: the casing is equipped with motor room, exhaust chamber, air inlet chamber, and air inlet chamber oral area is equipped with seal ring groove A, and casing motor room below is equipped with screw B, the heavy platform of baffle installation, seal ring groove B, through-hole, the heavy platform of spring location, button installation square hole.

3. The device for switching and locking the forward and reverse rotation functions of the pneumatic wrench by using one key as claimed in claim 1, wherein: the cylinder is arranged in the motor group and is provided with an air groove A, an air groove B, a screw hole A, an eccentric inner hole and an exhaust hole, and arc grooves are formed in two end faces.

4. The device for switching and locking the forward and reverse rotation functions of the pneumatic wrench by using one key as claimed in claim 1, wherein: the air valve seat is provided with a sealing ring groove C, an air groove D, an air inlet hole, an exhaust groove, an air valve hole, a screw through hole A and a solid pin mounting hole, and the air valve seat sealing ring is arranged in the sealing ring groove C to isolate the communication among the air groove C, the air groove D and the outside; the air valve seat is connected with the air cylinder through a screw A, so that the air groove C is always communicated with the air groove A of the air cylinder, the air groove D is always communicated with the air groove B of the air cylinder, and the air inlet hole is always communicated with the air inlet chamber of the shell; the sealing ring A is arranged in the sealing ring groove A of the shell, so that the air inlet chamber of the shell is communicated with the air inlet hole of the air valve seat in a sealing way.

5. The device for switching and locking the forward and reverse rotation functions of the pneumatic wrench by using one key as claimed in claim 1, wherein: the valve bolt is provided with a gas groove E, a gas groove F, a shaft shoulder, a guide wheel shaft, a buckling ring groove, a square head and a screw hole C, and can axially slide in the valve hole of the valve seat.

6. The device for switching and locking the forward and reverse rotation functions of the pneumatic wrench by using one key as claimed in claim 1, wherein: the excircle of the guide wheel A is alternately provided with a rear guide groove with a certain inclination angle at the opening, a front guide groove stop point and an axle center through hole A, and the small end of the guide wheel A is provided with a clamping groove A.

7. The device for switching and locking the forward and reverse rotation functions of the pneumatic wrench by using one key as claimed in claim 1, wherein: the outer circle of the guide wheel B is provided with a rotation guide groove with an opening with a certain inclination angle, a rotation guide groove stop point and an axis through hole B, and the small end of the rotation guide groove B is provided with a clamping groove B; the guide wheel B is matched with the clamping groove A of the guide wheel A through the clamping groove B, so that the guide wheel A and the guide wheel B form a guide wheel set, the rear stop guide groove, the front stop guide groove and the rotation guide groove form a finished working guide groove, and the guide wheel set is arranged on a guide wheel shaft of the valve bolt and can rotate; the valve bolt fastening ring groove is provided with an E-shaped fastening ring which is used for limiting the axial relative movement of the guide wheel set and the valve bolt so that the guide wheel set and the valve bolt move axially together.

8. The device for switching and locking the forward and reverse rotation functions of the pneumatic wrench by using one key as claimed in claim 1, wherein: the solid pin is inserted into the mounting hole of the solid pin of the air valve seat and is arranged in the working guide groove of the guide wheel set, and the guide wheel set can only do specific axial movement and autorotation movement under the control of the solid pin.

9. The device for switching and locking the forward and reverse rotation functions of the pneumatic wrench by using one key as claimed in claim 1, wherein: the button is equipped with spring location axle, square hole, screw heavy platform, and the square hole cooperates with the valve cock square head, locks through screw C, makes valve cock and button connection an organic whole, and the button is installed in casing button installation square hole, and restriction valve cock and button can only axial motion but can not axial rotation.

10. The device for switching and locking the forward and reverse rotation functions of the pneumatic wrench by using one key as claimed in claim 1, wherein: the reset spring is arranged between the shell spring positioning sinking platform and the key spring positioning shaft, and plays roles in locking the positive and negative rotation working state of the valve bolt and resetting the state.