CN220218376U - Air passage control switch and nailing tool - Google Patents

Abstract

The utility model discloses a gas circuit control switch and a nailing tool, which belong to pneumatic nailing tools, and the continuous firing frequency of the existing nailing tools is not high; when the valve rod is positioned at the closed position, the high-pressure air port is communicated with the first air port, and the traveling valve sleeve is positioned at the first position; the movable valve sleeve is positioned between the first position and the second position to realize continuous nailing, the movable valve sleeve is positioned at the first position, the first air port and the high-pressure air port are blocked by the movable valve sleeve and are communicated with the pressure release air port, so that the pressure release path and time of the first air port are shortened, the control air chamber of the nailing tool is enabled to release pressure rapidly, the continuous nailing frequency of the nailing tool is improved, and the first air port and the high-pressure air port are communicated with each other through the movable valve sleeve to open a nailing air path.

Description

Air passage control switch and nailing tool

Technical Field

The utility model belongs to a pneumatic nailing tool, and particularly relates to a gas circuit control switch capable of switching continuous or single hair during nailing and a nailing tool.

Background

The patent of the utility model with the publication number of CN217153055U discloses a speed-regulating single-burst switching mechanism and a pneumatic tool, wherein the pneumatic tool can realize two-in-one of the single-burst switching function and the continuous-burst speed regulating function.

According to the scheme, after the trigger is pulled, high-pressure air in the control air chamber flows to the return air chamber through the switching mechanism and the speed regulation type single-continuous-emission switching mechanism, then the high-pressure air leaks out from the return air chamber through a gap between the gun needle and the bottom plug, the pressure of the control air chamber is reduced, the pressure of air borne by the lower side of the balance valve is higher than that of the return air chamber, the balance valve is pushed to move to open the nailing air channel, and the high-pressure air in the air storage chamber pushes the piston to drive the gun needle to move nailing. The pressure release path of the control air chamber and the time spent are long, and in order to ensure that the return air chamber keeps enough air pressure to push the piston to reset when the air cylinder resets, the gap between the gun needle and the bottom plug is moderate, and cannot be too large, so that the pressure release speed of the control air chamber is low, and the improvement of the continuous firing frequency is limited.

Disclosure of Invention

The utility model aims to solve the technical problems and the technical task of overcoming the defect of low continuous frequency of the existing nailing tool, and provides a gas circuit control switch capable of rapidly releasing pressure and the nailing tool with high continuous frequency.

To achieve the above object, the air path control switch of the present utility model includes a seat, a trigger, and a valve rod disposed on the seat, the valve rod being configured to be maintained in a closed position by high-pressure air and to be axially moved to an activated position against the action of the high-pressure air when the trigger is actuated; the method is characterized in that:

the gas circuit control switch is provided with a high-pressure gas port, a first gas port, a second gas port and a pressure relief gas port, wherein a movable valve sleeve is sleeved on the valve rod and is configured to move between a first position and a second position along the valve rod when gas pressures born by two axial ends of the movable valve sleeve are different;

when the valve rod is positioned at the closed position, the high-pressure air port is communicated with the first air port, and the traveling valve sleeve is positioned at the first position;

when the valve rod is positioned at the starting position, the movable valve sleeve is shifted between a first position and a second position, when the movable valve sleeve is positioned at the first position, the first air port and the high-pressure air port are blocked by the movable valve sleeve, the first air port is communicated with the pressure release air port, and when the movable valve sleeve is positioned at the second position, the first air port is communicated with the high-pressure air port through the movable valve sleeve.

The gas circuit control switch has the advantages that when the valve rod is positioned at the starting position, the movable valve sleeve is shifted between the first position and the second position to realize continuous nailing, and when the movable valve sleeve is positioned at the first position, the first gas port and the high-pressure gas port are blocked by the movable valve sleeve and are communicated with the pressure release gas port, so that the pressure release path and time of the first gas port are shortened, especially the pressure release gas port is directly opened, the pertinence of the action is strong, the control gas chamber of the nailing tool can be quickly released, the movable valve sleeve is quickly shifted between the first position and the second position, and the continuous nailing frequency of the nailing tool is improved.

In order to ensure the flexibility of the action, a fixed sleeve is fixed on the seat, the fixed sleeve is coaxial with the valve rod and sleeved outside the traveling valve sleeve, a radial first valve hole is arranged on the fixed sleeve, the outer port of the first valve hole is a first air port, a high-pressure air port is arranged in the center of one end of the traveling valve sleeve, a radial traveling valve hole is arranged on the traveling valve sleeve, a pressure relief hole is arranged on the valve rod, the outer port of the pressure relief hole is a pressure relief air port, a second air port is arranged on the seat and is used for applying air pressure to the other end of the traveling valve sleeve, and the air pressure applied by the high-pressure air port to one end of the traveling valve sleeve is opposite to the air pressure applied by the second air port to the other end of the traveling valve sleeve;

when the valve rod is positioned at the closed position, the high-pressure air port is communicated with the first air port through the movable valve hole and the first valve hole;

when the valve rod is positioned at the starting position, the first air port is communicated with the pressure release air port through the first valve hole and the movable valve hole when the movable valve sleeve is positioned at the first position, and the high-pressure air port is communicated with the first air port through the movable valve hole and the first valve hole when the movable valve sleeve is positioned at the second position.

Accordingly, the gas path trend of the control gas chamber is switched by the movement of the traveling valve sleeve, and the continuous sending function is further realized.

In order to ensure the tightness of the structure, the valve rod is axially sealed with the movable valve sleeve, the movable valve sleeve is axially sealed with the fixed sleeve, and the movable valve sleeve is axially sealed with the seat and the fixed sleeve so as to prevent air flow from axially flowing at the sealing part.

In order to realize smooth air passage communication, the outer peripheral surface of the fixed sleeve is provided with a first annular groove, and the outer port of the first valve hole is positioned in the first annular groove; the outer peripheral surface of the traveling valve sleeve is provided with a second annular groove, the outer port of the traveling valve hole is positioned in the second annular groove, the outer peripheral surface of the valve rod is provided with a third annular groove, and the inner port of the pressure relief hole is positioned in the third annular groove. Accordingly, an annular cavity is formed at each annular groove, and a plurality of circulation ports can be formed in each of the first valve hole, the movable valve hole and the pressure relief hole, so that the flow speed of air flow is increased.

In order to achieve the above object, the nailing tool of the present utility model is characterized in that: the nailing machine comprises a main body and an air channel control switch, wherein the main body is provided with an air storage chamber, a control air chamber, a working air chamber, a return air chamber, a first air channel, a second air channel, a nailing air channel and an exhaust channel, the first air channel is communicated with the first air port of the air channel control switch and the control air chamber, the high-pressure air port of the air channel control switch is communicated with the air storage chamber, the second air channel is communicated with the return air chamber and the second air port of the air channel control switch, the nailing air channel is arranged between the air storage chamber and the working air chamber, the working air chamber and the return air chamber are provided with the first channel and the second channel, the piston is arranged in the working air chamber and reciprocates between a nailing position and a reset position, when the piston is positioned at the nailing position after being nailed by a gun needle, the first channel and the second channel are separated by the piston, high-pressure air flows from the closed working air chamber to the return air chamber, when the piston is reset, the exhaust channel is opened, and the high-pressure air of the second channel moves from the closed return air chamber to the reset position by the working pushing piston.

Accordingly, the valve rod is moved to the starting position by pulling the trigger, the movable valve sleeve is shifted between the first position and the second position to realize continuous nailing, the first air port is communicated with the pressure release air port when the movable valve sleeve is positioned at the first position, so that the pressure release path and time of the control air chamber through the first air port are shortened, particularly the pressure release air port is directly opened, the pertinence of the action is strong, the control air chamber of the nailing tool can be rapidly depressurized, the movable valve sleeve is rapidly shifted between the first position and the second position, and the continuous nailing frequency of the nailing tool is improved.

In order to facilitate assembly, the tightness and universality of the gas circuit control switch mounted on the main body are improved, the main body is provided with a socket, the port of the first gas circuit is positioned on the socket, a throttle channel is arranged on the seat, one end of the throttle channel, which is close to the traveling valve sleeve, is connected with a pressure change cavity, one end of the throttle channel, which is far away from the traveling valve sleeve, is provided with a second gas port, the direction of the socket is vertical to the direction of the second gas circuit, the direction of the high-pressure gas port is vertical to the direction of the second gas port, the gas circuit control switch is fixed on the main body through a screw which obliquely passes through the seat, the high-pressure gas port of the gas circuit control switch is abutted with the socket by fastening the screw, the second gas port of the gas circuit control switch is abutted with the second gas circuit, and a speed regulating component for regulating the flow of the throttle channel is configured on the throttle channel to be used for regulating the continuous frequency of nailing tools.

In order to improve the tightness of the gas circuit control switch mounted on the main body, the high-pressure gas port and the first gas port protrude from the seat and are inserted into the socket.

In order to control the cylinder to move for nailing and resetting, a balance valve is arranged between the control air chamber and the working air chamber, and the balance valve separates the control air chamber from the working air chamber and is configured to move under the action of the change of the air pressure on two sides of the balance valve and the reset spring so as to open or close a nailing air passage.

In order to timely open the nailing gas path and exhaust, the piston is controlled to act, a through hole is formed in the center of the balance valve, one end of the through hole contacts the sealing pad to close the exhaust channel when the balance valve opens the nailing gas path, and one end of the through hole leaves the sealing pad to open the exhaust channel when the balance valve closes the nailing gas path.

In order to prevent compressed air of the return air chamber from flowing to the working air chamber through the first channel, the working air chamber is positioned in the air cylinder, the return air chamber is positioned outside the air cylinder, the outer peripheral wall of the air cylinder is provided with a fourth annular groove, the first channel is a radial through hole arranged on the air cylinder, the outer port of the radial through hole is positioned in the fourth annular groove, and an elastic sealing ring is sleeved in the fourth annular groove, so that the first channel can only supply air flow to flow from the working air chamber to the return air chamber in one direction.

According to the utility model, the gas circuit control switch is provided with the traveling valve sleeve, and the traveling valve sleeve is configured to move between a first position and a second position along the valve rod when gas pressures born by two axial ends of the traveling valve sleeve are different; when the valve rod is positioned at the closed position, the high-pressure air port is communicated with the first air port, and the traveling valve sleeve is positioned at the first position; the movable valve sleeve is positioned between the first position and the second position to realize continuous nailing, the movable valve sleeve is positioned at the first position, the first air port and the high-pressure air port are blocked by the movable valve sleeve and are communicated with the pressure release air port, so that the pressure release path and time of the first air port are shortened, the control air chamber of the nailing tool is enabled to release pressure rapidly, the continuous nailing frequency of the nailing tool is improved, and the first air port and the high-pressure air port are communicated with each other through the movable valve sleeve to open a nailing air path.

Drawings

FIG. 1 is an isometric view of the nailing tool of the present utility model;

FIG. 2 is a schematic front view of the nailing tool of FIG. 1;

FIG. 3 is a cross-sectional view taken along A-A of FIG. 2;

FIG. 4 is an exploded view of the body and top cover of the nailing tool of FIGS. 1-3;

FIG. 5 is a schematic view of the top cover of FIG. 4 from another perspective;

FIG. 6 is a schematic view of the body of FIG. 4 from another perspective;

FIG. 7 is a schematic front view of the body of FIGS. 4 and 6;

FIG. 8 is a B-B cross-sectional view of FIG. 7;

FIG. 9 is a C-C cross-sectional view of FIG. 7;

FIG. 10 is an isometric view of the air circuit control switch of the nailing tool of FIG. 1;

FIG. 11 is a schematic front view of the nailing tool of FIG. 10;

FIG. 12 is a D-D sectional view of FIG. 11;

FIG. 13 is an E-E cross-sectional view of FIG. 11;

FIG. 14 is a cross-sectional view taken in the F-F direction of FIG. 13;

FIG. 15 is an exploded schematic view of the air circuit control switch of FIGS. 10-14;

FIG. 16 is a schematic view of the seat shown in FIG. 15 at a second view angle;

FIG. 17 is a schematic view of the seat shown in FIG. 15 from a third perspective;

FIG. 18 is a schematic illustration of actuating the trigger of FIG. 3 to move the valve stem to the actuated position to actuate the nailing tool;

fig. 19 is an enlarged view of the a portion structure of fig. 18;

FIG. 20 is a schematic view of the piston of FIG. 18 with a gun needle in a nailer position ready for reset after completion of a nailer;

fig. 21 is an enlarged view of the B part structure of fig. 20;

FIG. 22 is a schematic view of the piston of FIG. 20 with the needle fully reset to the reset position;

fig. 23 is an enlarged view of the C-section structure of fig. 22;

FIG. 24 is a schematic view of the piston of FIG. 22 with the gun needle again activated from the reset position for stapling;

fig. 25 is an enlarged view of the C-section structure of fig. 24;

FIG. 26 is a schematic diagram of adjusting the burst frequency by rotating an adjustment lever;

FIG. 27 is a schematic illustration of the switching of the nailing tool to the single shot mode by pressing the adjustment lever;

the reference numerals in the figures illustrate:

100 gas circuit control switch:

110 seats, 111 longitudinal holes, 112 transverse holes, 113 restricted passages, 114 pressure change chambers, 115 second ports, 116 triggers, 117 safety, 118 torsion springs,

120 switch assembly, 1201 valve stem, 1202 traveling valve sleeve, 1203 stationary sleeve, 1204 first valve bore, 1205 first annular groove, 1206 traveling valve bore, 1207 second annular groove, 1208 pressure relief bore, 1209 third annular groove, 1210 high pressure port, 1211 first port, 1212 pressure relief port,

130 speed regulating components, 131 adjusting rods, 132 adjusting sleeves, 133 planes, 134 annular grooves, 135 helical compression springs, 136 first shaft check rings, 137 bolts and 138 second shaft check rings;

140 screws;

200 main body: the gun comprises a gun body 201, a top cover 202, a sealing gasket 203, a balance valve 204, a return spring 205, a cylinder 206, a piston 207, a gun needle 208, a buffer sleeve 209, a bottom plug 210, a gas storage chamber 211, a control gas chamber 212, a working gas chamber 213, a return gas chamber 214, a first gas passage 215, a second gas passage 216, a nailing gas passage 217, a gas exhaust passage 218, a first passage 219, a second passage 220, a bearing port 221, a through hole 222, a fourth annular groove 223 and an elastic sealing ring 224;

300 nail magazine.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

The terms "comprises" and "comprising" and any variations thereof, in the description and claims, are intended to cover a non-exclusive inclusion, such as a method or article, that comprises a list of features does not necessarily limit the features to those expressly listed, but may include other features not expressly listed that may be included in such method or article.

In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element in question must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Wherein the "up" and "down" directions are opposite.

In the description of the present utility model, "gas pressure", "high pressure", "low pressure" refers to the pressure of a gas, and "gas pressure" is the pressure that the gas pressure acts on the force-receiving surface to exert on the force-receiving surface.

In the description of the present utility model, it should be understood that the technical features defined by the terms "first", "second", etc. having sequential concepts are merely for the purpose of clearly describing the defined technical features, so that the defined technical features can be clearly distinguished from other technical features, and are not so named as to represent actual implementation, and thus should not be construed as limiting the present utility model.

The present utility model will be described in detail with reference to specific embodiments and drawings.

First, as shown in fig. 10-17, there is a gas circuit control switch 100, which gas circuit control switch 100 can be assembled to a body 200 of a pneumatic nailing tool for activating the nailing tool. The gas circuit control switch 100 includes a base 110, a switch assembly 120, and a speed regulating assembly 130.

The seat 110 is shown in fig. 15-17 as a block structure having a longitudinal bore 111, a transverse bore 112 and a throttle passage 113. The bottom of the longitudinal bore 111 communicates with the middle of the transverse bore 112 via a throttle passage 113 as shown in fig. 13-14, the throttle passage 113 being connected to the pressure change chamber 114 at the end adjacent the traveling valve housing 1202, the pressure change chamber 114 being located on the underside of the traveling valve housing 1202. The end of the throttle passage 113 remote from the traveling valve sleeve 1202 is the second port 115. Trigger 116 is pivotally connected to seat 110. In order to prevent the trigger from being touched by mistake and to start the nailing tool, a safety 117 is provided for the trigger, and the safety 117 is mounted on the seat 110 by a pin shaft like the trigger and is positioned at a position supporting the trigger under the elastic force of the torsion spring 118. When the trigger is to be actuated, the trigger must be actuated first by actuating the safety guard to the trigger-out position.

The switch assembly 120 includes a valve stem 1201 coaxially mounted to the longitudinal bore 111, a traveling valve sleeve 1202, and a stationary sleeve 1203.

Wherein the fixing sleeve 1203 is fixed to the seat 110 in such a manner that the air passage control switch 100 is defined between the seat 1110 and the main body 200 when assembled to the main body 200 of the pneumatic nailing tool, and the fixing sleeve 1203 is not movable with respect to the seat. The fixed sleeve 1203 defines a radial first valve aperture 1204. The outer circumferential surface of the fixing sleeve 1203 is provided with a first annular groove 1205, and the outer port of the first valve hole 1204 is located in the first annular groove 1205.

The traveling valve sleeve 1202 is located inside the stationary sleeve 1203 in the diameter direction, i.e. the stationary sleeve 1023 is sleeved outside the traveling valve sleeve 1202. The traveling valve housing 1202 is provided with a radial traveling valve bore 1206. The outer circumferential surface of the traveling valve housing 1206 is provided with a second annular groove 1207, and the outer port of the traveling valve housing 1206 is located in the second annular groove 1207.

In the diameter direction, the valve rod 1201 is surrounded by the traveling valve sleeve 1202, and the valve rod 1201 is provided with a pressure relief hole 1208. The outer peripheral surface of the valve rod 1201 is provided with a third annular groove 1209, and the inner port of the pressure relief hole 1208 is located in the third annular groove 1209. The lower end of the valve stem 1201 protrudes downwardly through the longitudinal bore 111 and bears against the trigger 116.

As shown in fig. 12, the valve stem 1201, the traveling valve sleeve 1202 and the stationary sleeve 1203 form a sleeve-fitting relationship with the traveling valve sleeve sleeved outside the valve stem and the stationary sleeve sleeved outside the traveling valve sleeve. Moreover, the valve stem 1201 is axially sealed against the traveling valve sleeve 1202, the traveling valve sleeve 1202 is axially sealed against the stationary sleeve 1203, the traveling valve sleeve 1202 is axially sealed against the seat 110 and the stationary sleeve 1203 by the sealing ring being positioned in the respective location.

The gas circuit control switch 100 has a high pressure gas port 1210, a first gas port 1211, a second gas port 115, and a pressure relief gas port 1212. Wherein, the high pressure air port 1210 is arranged at the center of the upper end of the traveling valve sleeve 1202, and the outer port of the first valve hole 1204 is a first air port 1211. A second port 115 is provided in the seat 110 for allowing the flow of gas therethrough to exert a gas pressure on the lower end of the traveling valve sleeve 1202. The outer port of the pressure relief hole 1208 is a pressure relief port 1212. Further, the gas pressure exerted by the gas pressure from the high pressure port 1210 against the upper end of the traveling valve sleeve 1202 is opposite the gas pressure exerted by the gas pressure from the second port 115 against the lower end of the traveling valve sleeve. And the high-pressure air port 1210 and the first air port 1211 protrude from the seat.

The valve stem 1201 is configured to remain in a closed position (low position) under the influence of high pressure air and to move axially to an activated position (high position) against the influence of the high pressure air when the trigger 116 is actuated. The traveling valve sleeve 1202 is configured to move along the valve stem 1201 between a first position and a second position when the gas pressure experienced at its axial ends is different.

Also, the high pressure air port 1210 communicates with the first air port 1211 via the traveling valve bore 1206 and the first valve bore 1204 when the valve stem 1201 is in the closed position; and the traveling valve sleeve 1202 is in the first position.

The traveling valve sleeve 1202 is indexed between a first position and a second position when the valve stem 1201 is in the activated position, the first air port 1211 and the high pressure air port 1210 are blocked by the traveling valve sleeve 1202 when the traveling valve sleeve 1202 is in the first position and the first air port 1211 communicates with the pressure relief air port 1212 through the first valve bore 1204 and the traveling valve bore 1206, and the first air port 1211 communicates with the high pressure air port 1210 through the first valve bore 1204 and the traveling valve bore 1206 when the traveling valve sleeve 1202 is in the second position.

Accordingly, the trigger 116 is pulled to change the position of the valve rod 1201, and the upper and lower ends of the floating valve sleeve 1202 are lifted and lowered under different air pressure, so that the communication and blocking relation of the air ports of the switch assembly 120 are changed, and the starting control of the nailing tool is realized.

The governor assembly 130, as shown in fig. 13, 15, 26-27, includes an adjustment rod 131, an adjustment sleeve 132, and a helical compression spring 315. The adjustment lever 131 is fitted in the lateral hole 112 by the first shaft retainer 136 and is movable in the length direction of the adjustment lever. The adjusting lever 131 is biased toward one end thereof by the coil compression spring 135, and pressing the adjusting lever against the elastic force of the coil compression spring 135 can cause the adjusting lever to move toward the other end. The adjusting sleeve 132 is screwed onto the adjusting rod 131 like a nut and is located in the transverse hole 112, the outer wall of the adjusting sleeve 132 is provided with a plane 133, and a bolt 137 connected to the seat 110 is directed to the plane 133 to limit the rotation of the adjusting sleeve. Thus, the adjustment sleeve can be urged to move along the adjustment lever by rotating the adjustment lever. The outer wall of the adjusting sleeve 132 is provided with a ring groove 134, and the opening degree of the throttle passage 113 is adjusted by changing the size of the overlapping portion of the ring groove 134 and the second air port 115 by the movement of the adjusting sleeve 132. In addition, the second shaft collar 138 is mounted on the adjustment lever 131, and the movement of the adjustment sleeve 132 on the adjustment lever is limited between the second shaft collar 138 and the step of the adjustment lever, preventing the adjustment sleeve from moving out of its adjustment range.

The nailing tool as shown in fig. 1-3 and 18-25 comprises a body 200 and a gas circuit control switch 100 as previously described. The main body 200 is particularly a part of the nailing tool excluding the air passage control switch 100 and the magazine 300 shown in fig. 1-3, and includes a gun body 201, a top cover 202, a gasket 203, a balance valve 204, a return spring 205, a cylinder 206, a piston 207, a gun needle 208, a cushion collar 209, and a base plug 210. The main body 200 is provided with a gas storage chamber 211, a control chamber 212, a working chamber 213, a return gas chamber 214, a first gas passage 215, a second gas passage 216, a nailing gas passage 217, and an exhaust passage 218. The air passage control switch 100 is fixed to the main body 200 by a screw 140 passing through the seat obliquely. The first air passage 215 is provided on the gun body 201 and the top cover 202, and the ports and interfaces of the first air passage 215 are shown in fig. 4-6. The first air channel 215 is communicated with the first air port 1211 and the control air chamber 212 of the air channel control switch, the high-pressure air port 1210 of the air channel control switch is communicated with the air storage chamber 211, the second air channel 216 is communicated with the return air chamber 214 and the second air port 115 of the air channel control switch, the nailing air channel 217 is arranged between the air storage chamber 211 and the working air chamber 213, a first channel 219 and a second channel 220 are arranged between the working air chamber 213 and the return air chamber 214, a piston 207 which is arranged in the working air chamber and moves reciprocally between a nailing position and a reset position is arranged, when the piston 207 is located at the nailing position after being nailed by the gun needle 208, the first channel 219 and the second channel 220 are separated by the piston 207 and high-pressure air of the first channel 219 flows from the closed working air chamber 213 to the return air chamber 214, when the piston 207 is reset, the air discharge channel 218 is opened and high-pressure air of the second channel 220 flows from the closed return air chamber 214 to the working air chamber 213 to push the piston to move from the nailing position to the reset position.

Moreover, the gun body 201 is provided with a socket 221, the port 215 of the first air channel is positioned at the socket 221, the direction of the socket 221 is vertical to the direction of the second air channel 216, the high-pressure air port 1210 is vertical to the direction of the second air port 115, the air channel control switch enables the high-pressure air port 1210 of the air channel control switch to be in butt joint with the socket 221 by fastening the screw 140, and the second air port 115 of the air channel control switch is in butt joint with the second air channel 216. The throttle channel 113 is provided with a speed regulating component 130 for regulating the flow rate of the throttle channel, and the speed regulating component is used for regulating the continuous frequency of the nailing tool. The high-pressure air port 1210 and the first air port 1211 are inserted into the socket 221. A balance valve 204 is provided between the control air chamber 212 and the working air chamber 213, and the balance valve 204 separates the control air chamber 212 from the working air chamber 213 and is configured to move to open or close the nailing air passage 217 by the change in air pressure on both sides of the balance valve by the return spring 205. The balance valve 204 has a through hole 222 in the center, and the upper end of the through hole 222 contacts the gasket 203 to close the exhaust passage 218 when the balance valve opens the nailing gas passage, and the upper end of the through hole 222 leaves the gasket 203 to open the exhaust passage 218 when the balance valve closes the nailing gas passage.

The working air chamber 213 is located in the air cylinder 206, the return air chamber 214 is located outside the air cylinder 206, the outer peripheral wall of the air cylinder 206 is provided with a fourth annular groove 223, the first channel 216 is a radial through hole arranged on the air cylinder 206, the outer port of the radial through hole is located in the fourth annular groove 223, and an elastic sealing ring 224 is sleeved in the fourth annular groove 223, so that the first channel can only enable air flow to flow from the working air chamber 214 to the return air chamber 213 in one direction.

As described above, the air storage chamber 211 is connected to a compressed air tank, and the nailing tool is started by pulling the trigger by means of the air passage control switch. The throttle passage is completely blocked by the adjusting sleeve by pressing the adjusting rod, so that the nailing tool is in a single shot mode. The position of the adjusting sleeve is adjusted by rotating the adjusting rod, the circulation capacity of the throttling channel is changed, and the nailing frequency of the nailing tool in the continuous firing mode can be adjusted. In the illustrated structure, when the adjusting rod is in a natural state, the nailing tool is in a continuous shooting mode, and the adjusting rod is pressed to enable the adjusting sleeve to completely block the throttling channel, so that the nailing tool is in a single shooting mode. However, in the specific implementation, the throttle channel can be completely blocked by the adjusting sleeve when the adjusting rod is in a natural state, the nailing tool is in a single-shot mode, and the nailing tool is switched to a continuous-shot mode by pressing the adjusting rod.

As shown in fig. 3, when the trigger 116 is not actuated, the valve rod 1201 is in the closed position (low position), the traveling valve sleeve 1202 is in the first position (low position), the compressed air in the air storage chamber 211 acts on the upper and lower sides of the balance valve 204 through two paths, one path acts on the lower side of the balance valve 204 through the nailing air path 217, the other path acts on the upper side of the balance valve 204 through the high pressure air port 1210, the traveling valve hole 1206, the first valve hole 1204, the first air port 1211 and the first air path 215, the upper and lower sides of the balance valve 204 are acted by the high pressure air, the upper side of the balance valve 204 is also acted by the downward elastic force of the return spring 205, the balance valve 204 is in the low position, the upper end of the working air chamber 213 is blocked, and the nailing air path 217 is blocked. The piston 207 is in the reset position (high position). The upper end of the traveling valve sleeve 1202 is acted by high-pressure air of the air storage chamber 211, the lower end of the traveling valve sleeve 1202 is communicated with the return air chamber 214 through the pressure change cavity 114, the throttling channel 113 and the second air channel 216, and is acted by low-pressure air, and the traveling valve sleeve 1202 is in a first position (low position).

24-25, after the trigger 116 is pulled, the valve rod 1201 is pushed to the starting position (high position) by the trigger, the traveling valve sleeve 1202 is still at the first position (low position), at this time, the high-pressure air of the control air chamber 212 leaks out through the first air passage 215, the first air port 1211, the first valve hole 1204, the traveling valve hole 1206, the pressure relief hole 1208 and the pressure relief air port 1212, the control air chamber 212 becomes low pressure, the lower side of the balance valve 204 is stressed to be higher than the upper side so as to move upwards, the upper port of the through hole 222 contacts the sealing pad 203 to seal the air outlet channel 218, the balance valve 204 opens the nailing air passage 217, the high-pressure air in the air storage chamber 211 acts on the upper end of the piston 207 through the nailing air passage, so that the piston 207 moves downwards rapidly, the nail in the nail cartridge 300 is impacted by the gun needle 208 until the piston 207 moves to the lowest position shown in FIG. 18-19, and the lower end of the piston 207 contacts the upper end of the buffer sleeve 209 to seal the second air passage 216. The first passage 219 and the second passage 220 are separated by the piston 207, the first passage 219 being located on the upper side of the piston 207 and the second passage 220 being located on the lower side of the piston 207. Next, the high-pressure air flows from the closed working air chamber 213 to the return air chamber 214 through the first passage 219, and the high-pressure air in the return air chamber 214 flows to the pressure change cavity 114 through the second air passage 216 and the throttling passage 113 until the upper and lower end surfaces of the traveling valve sleeve 1202 become high-pressure air, and at this time, the traveling valve sleeve 1202 moves up to the second position (high position) shown in fig. 20 to 21 because the area of the lower end surface of the traveling valve sleeve receiving the air pressure is larger than the area of the upper end surface receiving the air pressure.

As shown in fig. 20-21, after the traveling valve sleeve 1202 moves up to the second position (high position) shown in fig. 20-21, the high pressure air in the air storage chamber 211 is communicated with the control air chamber 213 through the high pressure air port 1210, the traveling valve hole 1206, the first valve hole 1204, the first air port 1211 and the first air passage 215, the air pressure at the upper side of the balance valve 204 is restored to high pressure, the balance valve moves downwards under the action of the elastic force of the return spring 205, the upper port of the balance valve through hole 222 is separated from the sealing pad 203 to open the air exhaust passage 218, the balance valve 204 closes the nailing air passage 217, the high pressure air in the working air chamber 213 is discharged through the air exhaust passage 218, the working air chamber becomes low pressure, and the high pressure air in the closed return air chamber 214 acts on the lower end face of the piston 207 from the second passage 216 and pushes the piston to the reset position (high position) shown in fig. 22-23.

22-23, the piston 207 is located at the reset position, the piston 207 opens the second air channel 216, the first channel 215 and the second channel 216 are located at the lower side of the piston 207, the high-pressure air in the return air chamber 214 enters the space at the lower end of the cylinder through the channel between the lower end of the cylinder 206 and the buffer sleeve 209 and leaks out through the gap between the gun needle 208 and the bottom plug 210 together with the high-pressure air in the space below the piston in the working air chamber 213 until the state shown in FIGS. 24-25 is restored.

In fig. 3, 18-25, the flow direction of the air flow in the respective flow channels is indicated by arrows and dashed lines with arrows.

As described above, after the trigger is pulled, the nailing device is cycled according to the sequence expressed in FIGS. 24-25, 18-19, 20-21, and 22-23 to achieve continuous nailing. When the frequency of the continuous nailing is to be adjusted, as shown in fig. 26, the adjusting rod 131 is rotated to drive the adjusting sleeve 132 to move along the adjusting rod, the size of the overlapping part of the annular groove 134 and the second air port 115 is changed, the opening degree of the throttle channel 113 is adjusted, and the time for switching the state shown in fig. 18-19 to the working state shown in fig. 20-21 is adjusted, so that the frequency of the continuous nailing can be adjusted.

When a single shot nailing is desired, as shown in fig. 27, the adjusting rod 131 is pressed to completely block the second air port 115 and the throttle passage is blocked by 113, then the nailing tool executes the nailing process of fig. 24-25 to 18-19 once every time the trigger is actuated from the state shown in fig. 3, then the trigger is released, the valve rod 1201 is reset from the state shown in fig. 18-19 to the closed position shown in fig. 3, and the air passage of the nailing tool is restored to the state shown in fig. 3. The trigger is repeatedly pulled once from the state shown in fig. 3 and released, and thus the single-shot nailing can be repeated.

Claims (10)

1. The gas circuit control switch comprises a seat (110), a trigger (116) and a valve rod (1201), wherein the valve rod (1201) is arranged on the seat (110), and the valve rod (1201) is configured to be kept at a closed position under the action of high-pressure air and axially move to a starting position against the action of the high-pressure air when the trigger is pulled; the method is characterized in that:

the gas circuit control switch is provided with a high-pressure gas port (1210), a first gas port (1211), a second gas port (115) and a pressure release gas port (1212), wherein a movable valve sleeve (1202) is sleeved on a valve rod (1201), and the movable valve sleeve (1202) is configured to move between a first position and a second position along the valve rod when gas pressures born by two axial ends of the movable valve sleeve are different;

the high pressure port (1210) is in communication with the first port (1211) when the valve stem (1201) is in the closed position and the traveling valve sleeve is in the first position;

the traveling valve sleeve (1202) is shifted between a first position and a second position when the valve rod (1201) is positioned at the starting position, the first air port (1211) and the high-pressure air port (1210) are blocked by the traveling valve sleeve (1202) when the traveling valve sleeve (1202) is positioned at the first position, the first air port (1211) is communicated with the pressure release air port (1212), and the first air port (1211) is communicated with the high-pressure air port (1210) through the traveling valve sleeve (1202) when the traveling valve sleeve (1202) is positioned at the second position.

2. The gas circuit control switch of claim 1, wherein: a fixed sleeve (1203) is fixed on the seat (110), the fixed sleeve (1203) is coaxial with the valve rod (1201) and is sleeved outside the traveling valve sleeve (1202), a radial first valve hole (1204) is arranged on the fixed sleeve (1203), the outer port of the first valve hole (1204) is a first air hole (1211), a high-pressure air hole (1210) is arranged in the center of one end of the traveling valve sleeve (1202), a radial traveling valve hole (1206) is arranged on the traveling valve sleeve (1202), a pressure relief hole (1208) is arranged on the valve rod (1201), the outer port of the pressure relief hole (1208) is a pressure relief air hole (1212), a second air hole (115) is arranged on the seat (110) and is used for applying air pressure to the other end of the traveling valve sleeve (1202), and the air pressure applied by the high-pressure air hole (1210) to one end of the traveling valve sleeve (1202) is opposite to the air pressure applied by the second air hole (115) to the other end of the traveling valve sleeve;

the high-pressure air port (1210) is communicated with the first air port (1211) through the movable valve hole (1206) and the first valve hole (1204) when the valve rod (1201) is positioned at the closed position;

when the valve rod (1201) is positioned at the starting position, the first air port (1211) is communicated with the pressure release air port (1212) through the first valve hole (1204) and the traveling valve hole (1206) when the traveling valve sleeve (1202) is positioned at the first position, and the high-pressure air port (1210) is communicated with the first air port (1211) through the traveling valve hole (1206) and the first valve hole (1204) when the traveling valve sleeve (1202) is positioned at the second position.

3. The gas circuit control switch of claim 2, wherein: the valve rod (1201) and the traveling valve sleeve (1202), the traveling valve sleeve (1202) and the fixed sleeve (1203), the traveling valve sleeve (1202) and the seat (110) and the fixed sleeve (1203) are all sealed in the axial direction so as to prevent the air flow from flowing in the axial direction at the sealing part.

4. The gas circuit control switch of claim 2, wherein: the outer peripheral surface of the fixed sleeve (1203) is provided with a first annular groove (1205), and the outer port of the first valve hole (1204) is positioned in the first annular groove (1205); the outer peripheral surface of the traveling valve sleeve (1202) is provided with a second annular groove (1207), the outer port of the traveling valve hole (1206) is positioned in the second annular groove (1207), the outer peripheral surface of the valve rod (1201) is provided with a third annular groove (1209), and the inner port of the pressure relief hole (1208) is positioned in the third annular groove (1209).

5. Nailing tool, characterized by: comprises a main body (200) and the air passage control switch (100) as claimed in any one of claims 1 to 4, wherein the main body (200) is provided with an air storage chamber (211), a control air chamber (212), a working air chamber (213), a return air chamber (214), a first air passage (215), a second air passage (216), a nailing air passage (217) and an exhaust passage (218), the first air passage (215) is communicated with a first air port (1211) and the control air chamber (212) of the air passage control switch (100), a high-pressure air port (1210) of the air passage control switch is communicated with the air storage chamber (211), the second air passage (216) is communicated with the return air chamber (214) and a second air port (115) of the air passage control switch, the nailing gas path (217) is arranged between the gas storage chamber (211) and the working gas chamber (213), a first channel (219) and a second channel (220) are arranged between the working gas chamber (213) and the return gas chamber (214), a piston (207) which moves reciprocally between a nailing position and a return position is arranged in the working gas chamber (213), the first channel (219) and the second channel (220) are separated by the piston (207) when the piston (207) is positioned at the nailing position after nailing with the gun needle (208) and high-pressure air flows from the closed working gas chamber (213) to the return gas chamber (214), when the piston (207) is reset, the exhaust channel (218) is opened and the second channel (220) is moved towards the reset position by the high-pressure air flowing from the closed return air chamber (214) to the working air chamber (213) pushing the piston (207).

6. The nailing tool of claim 5 wherein: the main body (200) is provided with a socket (221), a port of the first air passage (215) is positioned at the socket (221), the seat (110) is provided with a throttling channel (113), one end of the throttling channel (113) close to the traveling valve sleeve (1202) is connected with the pressure change cavity (114), one end of the throttling channel (113) far away from the traveling valve sleeve (1202) is provided with a second air port (115), the direction of the socket (221) is perpendicular to the direction of the second air passage (216), the direction of the high-pressure air port (1210) is perpendicular to the direction of the second air port (115), the air passage control switch (100) is fixed on the main body (200) through a screw (140) passing through the seat in an inclined way, the high-pressure air port (1210) of the air passage control switch is in butt joint with the socket (221) by fastening of the screw, the second air port (115) of the air passage control switch is in butt joint with the second air passage (216), and a speed regulating component (130) for regulating the flow of the throttling channel is configured on the throttling channel (113) to be used for regulating the continuous sending frequency of a nailing tool.

7. The nailing tool of claim 6 wherein: the high-pressure air port (1210) and the first air port (1211) protrude from the seat (110) and are inserted into the socket (221).

8. The nailing tool of claim 5 wherein: a balance valve (204) is arranged between the control air chamber (212) and the working air chamber (213), and the balance valve (204) separates the control air chamber (212) from the working air chamber (213) and is configured to move under the action of the pressure change of the air on two sides of the return spring (205) and the balance valve so as to open or close the nailing air passage (217).

9. The nailing tool of claim 8 wherein: the center of the balance valve (204) is provided with a through hole (222), one port of the through hole (222) contacts the sealing pad (203) to seal the exhaust channel (218) when the balance valve (204) opens the nailing gas channel (217), and one port of the through hole (222) leaves the sealing pad (203) to open the exhaust channel (218) when the balance valve (204) closes the nailing gas channel (217).

10. The nailing tool of claim 5 wherein: the working air chamber (213) is positioned in the air cylinder (206), the return air chamber (214) is positioned outside the air cylinder (206), the outer peripheral wall of the air cylinder (206) is provided with a fourth annular groove (223), the first channel (219) is a radial through hole arranged on the air cylinder (206), the outer port of the radial through hole is positioned in the fourth annular groove (223), and an elastic sealing ring (224) is sleeved in the fourth annular groove (223) so that the first channel can only supply air flow to flow unidirectionally from the working air chamber (213) to the return air chamber (214).