阅读说明：本技术 单向阀止动的气动切割组件 (One-way valve stopped pneumatic cutting assembly ) 是由 孙迎兵 吴凤和 李航 刘子健 王迪文 于 2021-06-30 设计创作，主要内容包括：本发明涉及一种单向阀止动的气动切割组件,其包括控制单元、制动及动力单元和执行单元,控制单元通过第一螺纹连接件与制动及动力单元连接,且制动及动力单元中工作室与外壳连接,叶片式气动马达设于外壳中,马达轴的两端均通过马达轴承支撑于外壳中,马达轴的第一端设有大锥齿轮,且大锥齿轮与执行单元中的小锥齿轮啮合传动,弹簧座和摩擦盘设于马达轴的第二端,且摩擦盘通过摩擦盘定位键与马达轴滑动连接,弹簧设于弹簧座与所述摩擦盘之间。本发明利用单向阀原理,通过摩擦盘和第二螺纹连接件分离或贴合,不仅可以实现气动切割机的失气制动,还提高了气动切割机使用安全性,具有结构紧凑,操作简单,效果可靠等优点。(The invention relates to a one-way valve-stopped pneumatic cutting assembly which comprises a control unit, a brake and power unit and an execution unit, wherein the control unit is connected with the brake and power unit through a first threaded connecting piece, a working chamber in the brake and power unit is connected with a shell, a vane type pneumatic motor is arranged in the shell, two ends of a motor shaft are supported in the shell through motor bearings, a large bevel gear is arranged at the first end of the motor shaft and is in meshing transmission with a small bevel gear in the execution unit, a spring seat and a friction disc are arranged at the second end of the motor shaft, the friction disc is in sliding connection with the motor shaft through a friction disc positioning key, and a spring is arranged between the spring seat and the friction disc. The pneumatic cutting machine utilizes the principle of the one-way valve, and the friction disc is separated from or attached to the second threaded connecting piece, so that the air-loss brake of the pneumatic cutting machine can be realized, the use safety of the pneumatic cutting machine is improved, and the pneumatic cutting machine has the advantages of compact structure, simplicity in operation, reliable effect and the like.)

1. A pneumatic cutting assembly stopped by a one-way valve is characterized by comprising a control unit, a braking and power unit and an execution unit,

the control unit is connected with the braking and power unit through a first threaded connecting piece;

the braking and power unit comprises a second threaded connecting piece, a working chamber, a shell, a first bearing seat, a vane type pneumatic motor, a motor shaft, a large bevel gear, a spring seat, a spring, a friction disc and a second bearing seat, wherein the first end of the second threaded connecting piece is connected with the first end of the working chamber, the second end of the working chamber is connected with the first end of the shell, the cross section of the shell is in a U-shaped structure shape, the first end and the second end of the inner side of the shell are respectively provided with the first bearing seat and the second bearing seat, the side surface of the first bearing seat is provided with a bearing seat vent hole, the outer arc surface of the second bearing seat is provided with a vent groove opening, the outer side wall of the second end of the shell is provided with a vent hole, the vane type pneumatic motor is arranged in the shell and positioned between the first bearing seat and the second bearing seat, and the two ends of the motor shaft of the vane type pneumatic motor are supported on the first bearing seat and the second bearing seat through motor bearings The spring is arranged between the spring seat and the friction disc, the first end of the spring is fixedly connected with the spring seat connecting part of the spring seat, and the second end of the spring is fixedly connected with the first end face of the friction disc;

the execution unit is arranged in the shell, and a small bevel gear in the execution unit is in meshing transmission with the large bevel gear.

2. The one-way valve-stopped pneumatic cutting assembly according to claim 1, wherein the control unit comprises a handle, a switch, a thimble, a buckle, a first threaded connector, a sealing ball, a compression spring, and a sealing nut, the handle is provided with a plurality of air passages, the switch and the buckle are rotatably connected to the outside of the handle through a pin, the buckle is buckled on the switch, the sealing nut is arranged on the outer wall of the handle and located at the sealing cavity of the handle, a first end of the compression spring is arranged in a containing groove of the sealing nut, a second end of the compression spring is provided with the sealing ball, an upper spherical surface of the sealing ball is jointed with the sealing surface of the sealing cavity, an upper end of the sealing ball is provided with the thimble, an upper end of the thimble is jointed with the lower surface of the switch, and a second end of the handle is connected with a first end of the first threaded connector through shaft shoulder positioning, and the second end of the first threaded connector is connected with the first end of a second threaded connector in the brake and power unit.

3. The air-loss brake type pneumatic cutting machine based on friction clutch according to claim 1, wherein the execution unit comprises an output shaft, a small bevel gear, a first cutting blade transmission member, a second cutting blade transmission member, a washer, a cutting blade and a protective cover, the first end and the second end of the output shaft are respectively supported in the housing through a needle bearing and an output end bearing, the small bevel gear is arranged on the output shaft and is in meshing transmission with the large bevel gear, the protective cover is arranged on the housing and is positioned on the outer ring side of the cutting blade, the positioning nut is in threaded connection with the inner side wall of the housing, the first cutting blade transmission member is arranged between the positioning nut and the output shaft, the washer is arranged on the first cutting blade transmission member, and the cutting blade is arranged between the washer and the second cutting blade transmission member, and the second cutting piece transmission part is used for compressing the second cutting piece transmission part, the cutting piece and the gasket through a cutting piece fixing bolt, and the bevel pinion drives the rotation of the output shaft to realize the rotation of the cutting piece.

4. The friction clutch based air loss brake air powered cutter of claim 1 wherein air passing into a handle in the control unit can enter the vane air motor through an air passageway in the handle, an air inlet passage between an inner sidewall of the second threaded coupling and an outer disk wall of the friction disk, the working chamber and the bearing housing vent, and the vane air motor can drive the motor shaft to rotate.

5. The friction clutch based lost air brake air powered cutter of claim 1 wherein the plurality of air passages in the handle include a first air passage, a sealed cavity, and a second air passage, the first air passage being located at the first end of the handle and the first air passage being in communication with the second air passage through the sealed cavity.

6. The air-loss brake type pneumatic cutting machine based on friction clutch according to claim 1, wherein the working chamber is in a sleeve structure shape, an intermediate connecting portion is arranged in the middle of the outer side wall of the working chamber, a first connecting portion and a second connecting portion are respectively arranged at a first end and a second end of the outer side wall of the working chamber, the first connecting portion is in threaded connection with a connecting portion of the second threaded connecting portion, a first end face of the connecting portion is attached to a first side face of the intermediate connecting portion, a first end of the inner side wall of the housing is in threaded connection with the second connecting portion, and the first end face of the housing is attached to a second side face of the intermediate connecting portion.

7. The air brake pneumatic cutter according to claim 6, wherein the second end of the second threaded connector is provided with a connector connecting portion, and the first end surface of the second threaded connector is provided with a connecting groove recessed inward.

8. The friction clutch based lost air brake air powered cutter of claim 7, wherein a first end surface of the connecting groove abuts a second end surface of the friction disk and a groove diameter of the connecting groove is greater than a disk diameter of the friction disk.

9. The one-way valve stopped pneumatic cutting assembly of claim 1, wherein a spring seat attachment portion is disposed at a middle of the spring seat and a first end of the spring seat contacts an inner race of a motor bearing on the first bearing seat.

10. The friction clutch based lost air brake air powered cutter of claim 1, wherein a central axis of the working chamber coincides with a central axis of the friction disk and a central axis of the friction disk coincides with a central axis of the motor shaft.

Technical Field

The invention relates to the technical field of pneumatic cutting machines, in particular to a one-way valve-stopped pneumatic cutting assembly.

Background

Pneumatic cutters are common in factories and are used for cutting metal and non-metal materials. The existing pneumatic cutting machine is not provided with a braking mechanism, and after ventilation is stopped, the cutting blade still rotates for a period of time due to inertia. And because the edge of the cutting blade is mostly composed of diamond particles, the cutting blade is very sharp, and under the condition of negligence, industrial accidents often happen, so that great potential safety hazards exist. In order to solve the problem, the invention adds a braking mechanism between the control mechanism and the power mechanism of the pneumatic cutting machine, so that the cutting machine can normally work by pressing down a switch and can brake in time by loosening the switch. Compared with the braking modes such as disc braking, drum braking and the like, the invention has the advantages of more compact structure, no influence on the working space of the cutting machine, simple operation, safety and reliability.

Disclosure of Invention

In view of the above situation, the invention provides a pneumatic cutting assembly stopped by a one-way valve, which can be applied to cutting of metal and non-metal materials and has the advantages of simple and reliable working mode, strong operability and the like.

The invention adopts the technical scheme that the one-way valve-stopped pneumatic cutting assembly comprises a control unit, a braking and power unit and an execution unit, wherein the control unit is connected with the braking and power unit through a first threaded connecting piece; the braking and power unit comprises a second threaded connecting piece, a working chamber, a shell, a first bearing seat, a vane type pneumatic motor, a motor shaft, a large bevel gear, a spring seat, a spring, a friction disc and a second bearing seat, wherein the first end of the second threaded connecting piece is connected with the first end of the working chamber, the second end of the working chamber is connected with the first end of the shell, the cross section of the shell is in a U-shaped structure shape, the first end and the second end of the inner side of the shell are respectively provided with the first bearing seat and the second bearing seat, the side surface of the first bearing seat is provided with a bearing seat vent hole, the outer arc surface of the second bearing seat is provided with a vent groove opening, the outer side wall of the second end of the shell is provided with a vent hole, the vane type pneumatic motor is arranged in the shell and positioned between the first bearing seat and the second bearing seat, and the two ends of the motor shaft of the vane type pneumatic motor are supported on the first bearing seat and the second bearing seat through motor bearings The spring is arranged between the spring seat and the friction disc, the first end of the spring is fixedly connected with the spring seat connecting part of the spring seat, and the second end of the spring is fixedly connected with the first end face of the friction disc; the execution unit is arranged in the shell, and a small bevel gear in the execution unit is in meshing transmission with the large bevel gear.

Furthermore, the control unit comprises a handle, a switch, a thimble, a buckle, a first threaded connecting piece, a sealing ball, a compression spring and a sealing nut, wherein a plurality of air passages are arranged in the handle, the switch and the buckle are both rotationally connected to the outer side of the handle through a pin shaft, the buckle is buckled on the switch, the sealing nut is arranged on the outer wall of the handle and is positioned at a sealing cavity of the handle, a first end of the compression spring is arranged in a containing groove of the sealing nut, the sealing ball is arranged at a second end of the compression spring, an upper side spherical surface of the sealing ball is attached to a sealing surface of the sealing cavity, the thimble is arranged at the upper end of the sealing ball, the upper end of the thimble is attached to the lower surface of the switch, and the second end of the handle is positioned by a shaft shoulder and is connected with the first end of the first threaded connecting piece, and the second end of the first threaded connector is connected with the first end of a second threaded connector in the brake and power unit.

Further, the execution unit comprises an output shaft, a small bevel gear, a first cutting piece transmission member, a second cutting piece transmission member, a gasket, a cutting piece and a protective cover, wherein the first end and the second end of the output shaft are respectively supported in the shell through a needle bearing and an output end bearing, the small bevel gear is arranged on the output shaft and is in meshing transmission with the large bevel gear, the protective cover is arranged on the shell and is positioned on the outer ring side of the cutting piece, the positioning nut is in threaded connection with the inner side wall of the shell, the first cutting piece transmission member is arranged between the positioning nut and the output shaft, the gasket is arranged on the first cutting piece transmission member, the cutting piece is arranged between the gasket and the second cutting piece transmission member, and the second cutting piece transmission member enables the second cutting piece transmission member to be fixed through a cutting piece fixing bolt, The cutting blade and the gasket are pressed tightly, and the rotation of the output shaft can be realized through the driving of the bevel pinion.

Preferably, air passing into the handle in the control unit can enter the vane-type pneumatic motor through an air passage in the handle, an air inlet passage between an inner side wall of the second threaded coupling and an outer wall of the friction disk, the working chamber, and the bearing housing vent hole, and the vane-type pneumatic motor can drive the motor shaft to rotate.

Preferably, the plurality of air passages in the handle comprise a first air passage, a sealed cavity and a second air passage, the first air passage is located at the first end of the handle, and the first air passage is communicated with the second air passage through the sealed cavity.

Further, the studio is the sleeve structure form, the middle department of studio's lateral wall is equipped with intermediate junction portion, just the first end and the second end of studio's lateral wall are equipped with first connecting portion and second connecting portion respectively, first connecting portion with second threaded connection's connecting piece connecting portion threaded connection, just the first terminal surface of connecting piece connecting portion with the laminating of intermediate junction portion's first side, the first end of shell inside wall with second connecting portion threaded connection, just the first terminal surface of shell with the laminating of intermediate junction portion's second side.

Preferably, the second end of the second threaded connector is provided with a connector connecting portion, and the first end surface of the second threaded connector is provided with a connecting groove recessed inwards.

Preferably, the first end surface of the connecting groove abuts against the second end surface of the friction disc, and the groove diameter of the connecting groove is larger than the disc diameter of the friction disc.

Preferably, a spring seat connecting portion is arranged in the middle of the spring seat, and a first end of the spring seat is in contact with an inner ring of a motor bearing on the first bearing seat.

Preferably, a central axis of the working chamber coincides with a central axis of the friction disk, and a central axis of the friction disk coincides with a central axis of the motor shaft.

The invention has the characteristics and beneficial effects that:

1. according to the one-way valve-stopped pneumatic cutting assembly provided by the invention, the sealing ball is arranged in the handle, and the air channel in the handle can be opened and closed by opening and closing the compression ejector rod, the sealing ball and the compression spring, so that the air-obtaining starting and air-losing braking of the pneumatic cutting machine are realized.

2. According to the one-way valve stopping pneumatic cutting assembly provided by the invention, the friction disc and the spring seat are arranged on the motor shaft of the working chamber, the friction disc is connected with the motor shaft in a sliding manner through the friction disc positioning key, and the starting and braking of the pneumatic cutting machine can be realized through the left and right movement of the friction disc on the motor shaft based on the one-way valve principle.

3. According to the one-way valve-stopped pneumatic cutting assembly provided by the invention, when the control unit is ventilated, high-pressure gas can push the friction disc to move rightwards, and then the friction disc enters the vane type pneumatic motor through the air inlet channel between the inner side wall of the second threaded connecting piece and the outer wall of the friction disc and the bearing seat vent hole, so that the pneumatic motor is driven to rotate to drive the cutting machine to work, when the ventilation is stopped, the friction disc moves leftwards under the action of the spring and is attached to the first end face of the connecting groove, the cutting disc can be stopped immediately, the rapid braking of the cutting machine is favorably realized, the injury to a user is avoided, and the use safety of the cutting machine is improved.

4. The one-way valve-stopped pneumatic cutting assembly provided by the invention is compact in structure, does not occupy the working space of a cutting machine, realizes normal ventilation work, brakes a gas-losing cutting blade, and has the advantages of simplicity, practicability, convenience in braking, convenience in operation, no influence on the use of workers and the like.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic diagram of the control unit structure of the present invention;

FIG. 3 is a cross-sectional view of the handle of the present invention;

FIG. 4 is a schematic view of the brake and power unit configuration of the present invention;

FIG. 5 is a schematic view of the second bearing housing mechanism of the present invention;

FIG. 6 is a schematic view of the construction of the working chamber of the present invention;

FIG. 7 is a cross-sectional view of the working chamber of the present invention;

FIG. 8 is a cross-sectional view of a second threaded coupling of the present invention;

FIG. 9 is a schematic view of the spring seat construction of the present invention;

FIG. 10 is a cross-sectional view of an actuator unit of the present invention;

FIG. 11 is a cutting blade drive schematic of the present invention;

FIG. 12 is a schematic view of the brake and power unit of the present invention;

FIG. 13 is a schematic view of the brake and power unit gas flow of the present invention.

The main reference numbers:

a control unit 100; a handle 101; a first gas duct 1011; sealing the cavity 1012; a second gas passage 1013; a switch 102; a thimble 103; a buckle 104; a pin 105; a first threaded connection 106; a sealing ball 107; a compression spring 108; a seal nut 109; a brake and power unit 200; a second threaded coupling 201; a connector connection 2011; a connecting groove 2012; a working chamber 202; an intermediate connection portion 2021; a first connection portion 2022; a second connection portion 2023; a housing 203; a motor bearing 204; a first bearing housing 205; bearing seat vent holes 2051; a vane air motor 206; a motor shaft 207; a large bevel gear 209; a spring seat 210; a spring seat connecting portion 2101; a spring 211; friction disc detent keys 212; a friction disc 213; a second bearing housing 214; the vent notches 2141; an execution unit 300; a needle bearing 301; an output shaft 302; a bevel pinion 303; an output end bearing 304; a positioning nut 305; a first cutting blade drive 306; cutting blade fixing bolts 307; a second cutting blade drive 308; a gasket 309; a cutting blade 310; a shield cover 311; the transmission member positioning key 312.

Detailed Description

The technical contents, structural features, attained objects and effects of the present invention are explained in detail below with reference to the accompanying drawings.

The invention provides a one-way valve stopping pneumatic cutting assembly, in particular to a one-way valve based air-loss braking pneumatic cutting machine, which comprises a control unit 100, a braking and power unit 200 and an execution unit 300, as shown in fig. 1.

As shown in fig. 2, the control unit 100 is connected to the brake and power unit 200 through a first threaded connection 106, and the control unit 100 includes a handle 101, a switch 102, a thimble 103, a buckle 104, a first threaded connection 106, a sealing ball 107, a compression spring 108 and a sealing nut 109, wherein the handle 101 is provided with a plurality of air passages, the switch 102 and the buckle 104 are both rotatably connected to the outside of the handle 101 through a pin 105, the buckle 104 is clamped on the switch 102, the sealing nut 109 is provided on the outer wall of the handle 101 and located at a sealing cavity 1012 of the handle 101, a first end of the compression spring 108 is provided in a receiving groove of the sealing nut 109, a second end of the compression spring 108 is provided with the sealing ball 107, an upper spherical surface of the sealing ball 107 is attached to a sealing surface of the sealing cavity 1012, an upper end of the sealing ball 107 is provided with the thimble 103, an upper end of the thimble 103 is attached to a lower surface of the switch 102, a second end of the handle 101 is connected to a first end of the first threaded connection 106 through a shoulder, and a second end of the first threaded connection 106 is connected to a first end of a second threaded connection 201 in the brake and power unit 200.

As shown in fig. 3, the plurality of air channels in the handle include a first air channel 1011, a sealed cavity 1012 and a second air channel 1013, the first air channel 1011 is located at the first end of the handle 101, and the first air channel 1011 is in communication with the second air channel 1013 through the sealed cavity 1012.

As shown in fig. 4 and 5, the brake and power unit 200 includes a second screw coupling 201, a working chamber 202, a housing 203, a first bearing seat 205, a vane-type pneumatic motor 206, a motor shaft 207, a bevel gear 209, a spring seat 210, a spring 211, a friction disc 213 and a second bearing seat 214, a first end of the second screw coupling 201 is connected with a first end of the working chamber 202, a second end of the working chamber 202 is connected with a first end of the housing 203, the housing 203 has a U-shaped cross section, the first end and the second end of the inner side of the housing 203 are respectively provided with the first bearing seat 205 and the second bearing seat 214, a bearing seat vent hole 2051 is formed on the side surface of the first bearing seat 205, a vent notch 2141 is formed on the outer side surface of the second bearing seat 214, a vent hole is formed on the outer side wall of the second end of the housing 203, the vane-type pneumatic motor 206 is disposed in the housing 203 and located between the first bearing seat 205 and the second bearing seat 214, two ends of a motor shaft 207 of the vane type pneumatic motor 206 are supported on a first bearing seat 205 and a second bearing seat 214 through a motor bearing 204, a large bevel gear 209 is arranged at the first end of the motor shaft 207, a spring seat 210 and a friction disc 213 are arranged at the second end of the motor shaft 207 through a friction disc positioning key 212, the friction disc 213 is connected with the motor shaft 207 in a sliding manner through the friction disc positioning key 212, a spring 211 is arranged between the spring seat 210 and the friction disc 213, the first end of the spring 211 is fixedly connected with a spring seat connecting part 2101 of the spring seat 210, the second end of the spring 211 is fixedly connected with the first end surface of the friction disc 213,

as shown in fig. 6 and 7, the working chamber 202 is in a sleeve structure, the middle of the outer side wall of the working chamber 202 is provided with an intermediate connection portion 2021, the first end and the second end of the outer side wall of the working chamber 202 are respectively provided with a first connection portion 2022 and a second connection portion 2023, the first connection portion 2011 is in threaded connection with the connection portion 2011 of the second threaded connection member 201, the first end surface of the connection portion 2011 is attached to the first side surface of the intermediate connection portion 2021, the first end of the inner side wall of the housing 203 is in threaded connection with the second connection portion 2023, the first end surface of the housing 203 is attached to the second side surface of the intermediate connection portion 2021, and the first end surface of the second connection portion 2023 is attached to the outer ring of the motor bearing 204 on the first bearing block 205.

As shown in fig. 8, the second end of the second threaded connecting member 201 is provided with a connecting member connecting portion 2011, the first end surface of the second threaded connecting member 201 is provided with a connecting groove 2012 recessed inward, the first end surface of the connecting groove 2012 is attached to the second end surface of the friction disc 213, and the groove diameter of the connecting groove 2012 is greater than the disc diameter of the friction disc 213.

As shown in fig. 9, a spring seat connecting portion 2101 is provided at the middle of the spring seat 210, and a first end of the spring seat 210 is in contact with the inner ring of the motor bearing 204 on the first bearing seat 205.

In a preferred form, the central axis of the working chamber 202 coincides with the central axis of the friction disc 213, and the central axis of the friction disc 213 coincides with the central axis of the motor shaft 207.

As shown in fig. 4 to 9, the air introduced into the handle 101 of the control unit 1 can enter the vane air motor 206 through the air passage in the handle 101, the air inlet passage between the inner sidewall of the second threaded coupling 201 and the outer wall of the friction disk 213, the working chamber 202, and the bearing housing vent 2051, and the vane air motor 206 can drive the motor shaft 207 to rotate.

As shown in fig. 10, the execution unit 300 is disposed in the housing 203, and the small bevel gear 303 and the large bevel gear 209 in the execution unit 300 are in meshing transmission, the execution unit 300 includes an output shaft 302, a small bevel gear 303, a first cutting blade transmission member 306, a second cutting blade transmission member 308, a gasket 309, a cutting blade 310 and a shield 311, a first end and a second end of the output shaft 302 are respectively supported in the housing 203 through a needle bearing 301 and an output end bearing 304, the output shaft 302 is provided with the small bevel gear 303, the small bevel gear 303 and the large bevel gear 209 are in meshing transmission, the shield 311 is disposed on the housing 203 and located on an outer ring side of the cutting blade 310, a positioning nut 305 is in threaded connection with an inner side wall of the housing 203, the first cutting blade transmission member 306 is disposed between the positioning nut 305 and the output shaft 302, the first cutting blade transmission member 306 is circumferentially positioned and connected with the output shaft 302 through a transmission member positioning key 312, the gasket 309 is disposed on the first cutting blade transmission member 306, the cutting blade 310 is disposed between the washer 309 and the second cutting blade transmission member 308, and the second cutting blade transmission member 308 compresses the second cutting blade transmission member 308, the cutting blade 310 and the washer 309 via the cutting blade fixing bolt 307, and the rotation of the cutting blade 310 can be realized by the rotation of the output shaft 302 driven by the bevel pinion 303.

As shown in fig. 11, the output shaft 302 and the second cutting blade transmission member 308 are engaged to prevent the displacement of the two, and the first cutting blade transmission member 305 is fitted over the second cutting blade transmission member 307 and positioned by the transmission member positioning key 312.

In a preferred mode, the end face of the bevel pinion 303 is attached to the inner ring of the first end face of the output end bearing 304, the outer ring of the second end face of the output end bearing 304 is attached to the first end face of the positioning nut 305, the first end face of the gasket 309 is attached to the second end face of the second cutting blade transmission member 308, the second end face of the gasket 309 is attached to the first end face of the cutting blade 310, and the second end face of the cutting blade 310 is attached to the first end face of the second cutting blade transmission member 308.

As shown in fig. 12 and 13, the present invention adopts a one-way valve design, when ventilation is stopped, the spring 211 pushes the friction disc 213 and the end surface of the connection groove 2012 in the second threaded connection member 201 to be tightly attached, and the friction force between the friction disc 213 and the motor shaft 207 stops rotating; during ventilation, high-pressure gas entering from the left end pushes the friction disc 213 to overcome the spring force and separate from the end face of the connecting groove 2012 in the second threaded connecting part 201, the high-pressure gas enters the brake and power unit 200 through the air inlet channel between the friction disc 213 and the working chamber 202, pressure drop is generated when the high-pressure gas passes through a gap, and the pressure difference and the spring force on the two sides of the friction disc 213 are kept balanced, so that the gap between the friction disc 213 and the working chamber 202 is kept stable, and the high-pressure gas can smoothly pass through the gap.

The method comprises the following specific operation steps:

as shown in FIG. 1, when the pneumatic cutting assembly with one-way valve stop provided by the invention is used by a worker, firstly, a gas source is connected to one end of a handle 101, and when a switch 102 is pressed, a thimble 103 pushes a sealing ball 107 to move downwards, so that a sealing cavity 1012 is opened, and a first air passage 1011 is communicated with a second air passage 1013. At this time, high-pressure air enters the second threaded coupling 201 through an air passage, at this time, the high-pressure air pushes the friction disc 213 to move rightward against the spring force generated by the spring 211, so that the high-pressure air enters the working chamber 202 through an air inlet passage between the inner side wall of the second threaded coupling 201 and the outer disc wall of the friction disc 213, then enters the vane type pneumatic motor 206 through the bearing seat vent holes 2051 on the first bearing seat 205, then the high-pressure air flows out from the vent notch formed in the outer arc surface of the second bearing seat 214 and the vent hole formed in the outer side wall of the second end of the housing 203 to the atmosphere, and the vane type pneumatic motor 206 drives the motor shaft 207 to rotate through the flow of the high-pressure air, so that the motor shaft 207 drives the output shaft 302 and the cutting blade 310 to rotate through bevel gear meshing transmission.

When the cutting machine is used, the switch 102 is released, the compression spring 108 pushes the sealing ball 107 to close the air channel, air pressure in the cutting machine is rapidly reduced, the spring 211 pushes the friction disc 213 to move leftwards, the friction disc 213 is attached to the connecting groove 2012 in the first end face of the second threaded connecting piece 201, friction force is generated, and air loss braking is achieved by overcoming inertia of the cutting sheets and the like.

The above-mentioned embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements made to the technical solution of the present invention by those skilled in the art without departing from the spirit of the present invention shall fall within the protection scope defined by the claims of the present invention.