CN1293995C - Trigger valve of nailing gun - Google Patents

Abstract

The invention discloses a trigger valve of a nailing gun, which is mainly characterized in that a valve body is arranged among an air inlet channel, an exhaust channel and a cylinder channel in a gun body, a movable valve is sleeved in the valve body, a guide groove is arranged in the movable valve, a valve seat is arranged at the bottom of the valve body, a convex valve tube and a ring part are formed on the valve seat, the valve tube can be sleeved in the guide groove of the movable valve, an inner spring is arranged in the valve tube and pushes and contacts a valve rod penetrating through the ring part, so that the valve rod is driven by a press-buckling type trigger, and the movable valve can be driven to descend to open when the trigger is pressed, so that the opening direction of the movable valve can be the same as the direction of high-pressure air entering the trigger valve, and the aim of quickly driving a nail is fulfilled.

Description

trigger valve for nail gun

technical field

The present invention relates to a trigger valve of a nailing gun, in particular to setting a movable valve in a trigger valve with a valve seat, and at least one inner spring is arranged in the valve seat, so as to combine with the valve stem to drive the high-pressure air circuit for nailing. technology.

Background technique

Pneumatic nail gun is a tool that relies on high-pressure air as a power source to drive nails. There is a trigger valve in the gun body, which can control the timing of high-pressure air entering the cylinder to drive the nail.

Traditionally more advanced trigger valves, such as the technology disclosed in Taiwan Patent Publication No. 439630, mainly use the movable valve arranged in the trigger valve to receive the axial high-pressure air push for lifting displacement; when the trigger is pressed to push the valve stem When moving up, high-pressure air is loaded into the lower air chamber of the movable valve, and the high-pressure gas pressure in the lower air chamber pushes up the movable valve to open the trigger valve, so that a large amount of high-pressure air can be loaded into the cylinder to drive the driving rod.

However, the opening direction of the above-mentioned trigger valve is opposite to the intake direction of the high-pressure air entering the trigger valve. When the movable valve is pushed up by the high-pressure gas pressure of the lower air chamber, it must resist the reverse direction of the high-pressure air in the air inlet channel at the top of the movable valve. The thrust makes the movable valve unable to quickly push up and open the valve, so that the time for driving the nail in the high-pressure air loading cylinder is delayed, so there is a problem of delaying nail driving after the trigger is pressed, which needs to be improved.

Contents of the invention

The purpose of the present invention is to provide a trigger valve that can quickly activate high-pressure air to trigger nails, especially to allow the valve opening direction of the movable valve in the trigger valve body to be the same as the intake direction of high-pressure air entering the trigger valve, so as to lift the valve open Agility when nailing.

In order to achieve the above object, the present invention adopts a technical scheme: a trigger valve of a nailing gun, a cylinder is arranged in the gun body head of the nailing gun, a piston and a nailing rod at the bottom thereof are arranged in the cylinder, and the piston drives the Separated into a top air chamber and a bottom air chamber; one end of the top air chamber is provided with a cylinder channel and communicated with a trigger valve; the bottom of the bottom air chamber is connected to a return air chamber through a vent hole; a high-pressure air chamber is provided in the grip of the gun body The intake runner and the exhaust runner; the trigger valve contains a valve body, which is fixed between the inlet runner, the exhaust runner and the cylinder passage; the top of the valve body is provided with a main valve hole, which is connected with the inlet The air flow passages are connected; the inner wall of the valve body is provided with an inner valve hole, and the end wall of the valve body has at least one vent hole and an exhaust hole, the vent hole communicates with the cylinder channel, and the vent hole is connected to the exhaust flow channel. connected to each other; the bottom of the trigger valve is pivoted with a snap-on trigger; it is characterized in that the valve body of the trigger valve includes at least:

A movable valve, with an upper valve part and a lower valve part formed on the valve, which divides the interior of the valve body into an upper air chamber and a lower air chamber; a neck-shaped air guide groove is formed between the upper and lower valve parts, and the air guide groove The rib wall of the movable valve slides freely in the inner valve hole of the valve body, and an air inlet hole is provided on the top of the movable valve, which communicates with a guide groove in the movable valve;

A valve seat is arranged at the bottom of the valve body, and a convex valve tube and a ring are formed on the valve seat; a neck hole is formed on the top of the valve tube, which can communicate with the tube hole formed in the valve tube; and the valve The pipe can be inserted into the guide groove of the above-mentioned movable valve, so that the air intake hole, the guide groove, the neck hole and the pipe hole are connected; The gas tanks are connected;

a valve stem with one end embedded in the valve seat and the other end abutting against the trigger; and

An inner spring is arranged in the pipe hole of the valve seat and pressed against the valve stem.

In the above-mentioned trigger valve of the nailing gun, an upper air-stop gasket for controlling the opening and closing timing of the main valve hole of the valve body is arranged on the outer wall of the upper valve part.

In the above-mentioned trigger valve of a nailing gun, a middle air-stop gasket for regulating the opening and closing timing of the inner valve hole of the valve body is provided on the outer wall of the upper valve part.

In the above-mentioned trigger valve of the nailing gun, the outer wall of the lower valve part is provided with a bottom air-stop gasket to prevent the lower air chamber from communicating with the exhaust hole.

In the above-mentioned trigger valve of the nailing gun, the inner wall of the guide groove of the lower valve part is provided with an inner air-stop gasket for controlling the communication timing between the guide groove and the lower air chamber.

In the above-mentioned trigger valve of the nailing gun, before the valve stem is buckled, it is sleeved in the air groove of the valve seat and touches the inner spring, so that the pipe hole communicates with the air groove.

In the above-mentioned trigger valve of the nailing gun, the valve rod is implanted in the tube hole to push the inner spring after being buckled, and closes the channel between the tube hole and the air groove.

In the above-mentioned trigger valve of the nailing gun, the wall of the valve stem is provided with a front-stage air-stop washer that regulates the communication timing between the inner tube hole of the valve seat and the air groove.

In the above-mentioned trigger valve of the nailing gun, a sleeve is provided at the bottom of the valve seat for movably passing through the valve stem.

In the above-mentioned trigger valve of the nailing gun, there is an air gap between the wall of the valve stem and the wall of the sleeve hole of the sleeve, which communicates the lower air chamber with the outside atmosphere.

In the above-mentioned trigger valve of the nailing gun, a middle-section air-stop gasket is arranged on the wall of the valve stem to control the opening and closing timing of the air seam.

In the above-mentioned trigger valve of the nailing gun, an outer spring supports the movable valve in the lower air chamber between the valve seat and the movable valve.

In the above-mentioned trigger valve of the nailing gun, a trigger seat is provided at the bottom of the valve body for pivoting the trigger.

Due to the adoption of the above design, the present invention has the following advantages: the present invention adopts the above-mentioned structure, especially the configuration design in which the downward opening direction of the movable valve is the same as the direction in which the high-pressure air enters the trigger valve. Reduce the valve opening resistance of the movable valve, and improve the agility of firing the nail immediately after the trigger is pressed and the smoothness of valve opening. Compared with the traditional technology, it has a certain degree of progress.

Description of drawings

Fig. 1 is a sectional view of the present invention, illustrating the arrangement of trigger valve and trigger on the gun body, and the configuration form when the trigger is not pressed.

Fig. 2 is an action sectional view of the present invention, illustrating the state of depressing the trigger to release the high-pressure air pressure in the lower air chamber.

Fig. 3 is another action sectional view of the present invention, illustrating that in the state of Fig. 2, the movable valve is pushed down by the high-pressure air to open the air path for the high-pressure air to enter the cylinder, and then quickly nail the state.

Fig. 4 is another action sectional view of the present invention, illustrating the state in Fig. 3, releasing the trigger to reset the valve stem, and high-pressure air is loaded into the lower air chamber again to push the movable valve up to reset.

Fig. 5 is another action sectional view of the present invention, illustrating that in the state of Fig. 4, the movable valve resets to close the main valve hole and open the inner valve hole, so that the piston and the nailing rod return to the state of the ready nailing position.

Detailed ways

As shown in FIG. 1 , it discloses the assembly relationship of the trigger valve of the nailing gun of the present invention on the gun body 1 . Wherein, a cylinder 11 is arranged in the head of the gun body 1 of the nailing gun, and a piston 12 is pivotally arranged in the cylinder 11, and a nailing rod 13 is arranged at the bottom of the piston 12, which can penetrate and extend to the outside of the cylinder to trigger the nail, while passing The piston 12 divides the interior of the cylinder 11 into a top air chamber 14 and another bottom air chamber 15 (as shown in Figure 5); one end of the top air chamber 14 communicates with a cylinder channel 2, and the cylinder channel 2 can be communicated in a trigger valve; The cylinder wall at the bottom of the bottom air chamber 15 is provided with air vent 18, which can communicate with the return air chamber 17 on the outside of the bottom air chamber 15 and the cylinder wall; The exhaust flow channel 22 can be connected to a trigger valve; at the same time, a trigger seat 60 can be arranged at the bottom of the trigger valve to pivotally place a push-button trigger 6 to touch a button protruding from the trigger valve. Stem 35.

Above-mentioned trigger valve is the structural main body of the present invention, mainly comprises a valve body 3, a movable valve 4, a valve seat 5, a valve rod 35 and another inner spring 8 (as shown in Figure 1 and Figure 2); :

The valve body 3 is fixed between the air inlet flow passage 21, the exhaust flow passage 22 and the cylinder passage 2 in the gun body 1; the outer wall of the valve body 3 is provided with some air-stop gaskets to promote the air intake flow passage 21, the exhaust flow passage 22 There is no ventilation between the three of the cylinder channel 2; and, the top of the valve body 3 has a main valve hole 30 (as shown in Figure 3), and the inner wall of the valve body 3 has an inner valve hole 31 near the middle section, and the upper end of the valve body 3 The wall is also provided with at least one vent 32 and another exhaust hole 33; meanwhile, the main valve hole 30 communicates with the intake runner 21, the vent 32 communicates with the cylinder passage 2, and the exhaust vent 33 communicates with the exhaust port. The runners 22 are connected.

The movable valve 4 is sleeved in the above-mentioned valve body 3, an upper valve portion 41 and another lower valve portion 42 are formed on the valve, and the interior of the valve body 3 is divided into an upper air chamber 23 and a lower air chamber 24 (as shown in Figure 2 ), between the upper and lower valve parts 41 and 42 is formed with a constricted air guide groove 43, the rib wall of the air guide groove 43 can move and slide in the inner valve hole 31 of the above-mentioned valve body 3, and the movable valve 4 An air inlet 44 is arranged on the top, and a guide groove 45 is also arranged in the movable valve 4, and the air inlet 44 communicates with the guide groove 45;

An upper air-stop gasket 46 and another middle-level air-stop gasket 47 are arranged on the outer wall of the above-mentioned upper valve portion 41; The opening and closing timing of the inner valve hole 31 of the body 3; and a bottom air-stop gasket 48 is also provided on the bottom outer wall of the lower valve part 42, which can prevent the lower air chamber 24 from communicating with the exhaust hole 33; It includes an inner layer air-stop gasket 49 arranged on the inner wall of the guide groove 45, which can control the communication timing between the guide groove 45 and the lower air chamber 24.

The valve seat 5 is fixed on the bottom of the valve body 3, and a convex valve tube 51 and another ring portion 52 are formed on the valve seat; The valve pipe 51 on the valve seat 5 can be inserted into the guide groove 45 of the above-mentioned movable valve 4, so that the air inlet 44, the guide groove 45, the neck hole 53 and the pipe hole 54 form a connected form; the ring part At least one air guide hole 55 is provided on the wall surface of 52, which can communicate between the lower air chamber 24 and the air groove 56 formed in the ring portion 52; Assembled on the socket 57, one end of the valve stem 35 is implanted in the valve seat 5, and the other end touches the trigger 6.

The inner spring 8 is arranged in the tube hole 54 to press against the valve stem 35 and make the valve stem 35 in a state that can be pressed and retracted by the trigger 6 .

The above-mentioned valve rod 35 is sleeved in the air groove 56 before being buckled, and touches the inner spring 8 in the tube hole 54 (as shown in FIG. 4 ), and can be implanted in the tube hole 54 after being buckled. Push inner spring 8 (as shown in Figure 3).

The valve rod 35 which is movable through the sleeve 57 has an air gap 58 between the rod wall and the sleeve hole wall of the sleeve 57, so that the lower air chamber 24 can communicate with the outside atmosphere (as shown in Figure 2) ;and

Above-mentioned valve rod 35 rod wall is provided with a middle segment air-stop gasket 36, in order to control the opening and closing timing of air gap 58; Meanwhile, valve rod 35 rod wall is also provided with a front-section gas-stop gasket 37, can control above-mentioned pipe hole 54 and Timing of communication between the air tanks 56.

In addition, the present invention can also add an outer spring 7 in the lower air chamber 24 between the valve seat 5 and the movable valve 4 to assist the high-pressure air in the lower air chamber 24 to support the movable valve 4 to move upward.

Through the composition of the above-mentioned components, when the trigger valve of the present invention is in the state of not pressing the trigger 6, the valve rod 35 is held by the inner spring 8, and pressed down to touch the trigger 6 (as shown in Figure 1); at this moment , the front air-stop gasket 37 on the valve stem 35 is not implanted in the pipe hole 54, so the pipe hole 54 is connected to the air groove 56, and the middle-section air-stop gasket 36 on the valve stem 35 has been pressed down to close the air gap 58, Prevent the air groove 56 from leaking gas; and, the high-pressure air in the air inlet channel 21 can be introduced into the valve through the air inlet 44, the guide groove 45, the neck hole 53, the pipe hole 54, the air groove 56 and the air guide hole 55 in sequence. The pressure in the lower air chamber 24 of the body 3 can also cooperate with the active force of the outer spring 7 to push the movable valve 4 from bottom to top to form an upright state. At this moment, the thrust of the high-pressure air in the lower air chamber 24 or this thrust Add the active force of the outer spring 7, which is greater than the active force of the high-pressure air in the air intake channel 21 to push the movable valve 4 down. Therefore, the movable valve 4 can be kept in the upward position, so that the upper layer of the air-stop gasket 46 of the movable valve 4 can Tightly close the main valve hole 30, so the high-pressure air is not loaded in the cylinder 11 to drive the piston 12 for nailing, so the stable non-nailing state can be maintained.

When the operator depresses the trigger 6 (as shown in Figure 2), the valve stem 35 pushes the inner spring 8 and lifts up, so that the front section of the valve stem 35 and its front section air-stop gasket 37 are implanted in the tube hole 54, and the tube is closed. The passage between the hole 54 and the air groove 56, so the high-pressure air flowing into the pipe hole 54 from the air intake channel 21 cannot be introduced into the lower air chamber 24 through the air groove 56 and the air guide hole 55, and the middle section on the valve stem 35 is blocked. The gasket 36 has opened the passage between the air slot 58 and the outside world, so the high-pressure air originally gathered in the lower air chamber 24 is discharged to the outside through the air slot 58, so that the lower air chamber 24 is in a decompression state, and the external air chamber that can be added The active force of the spring 7 is also less than the active force of the high-pressure air pushing the movable valve 4 displacement, so the high-pressure air in the air intake channel 21 will quickly push the movable valve 4 downwards, so that the movable valve 4 presents a lowered state in the valve seat 3 ( As shown in Figure 3), the upper air-stop gasket 46 of the movable valve 4 opens the main valve hole 30, so that the high-pressure air can load the top cylinder chamber 14 through the main valve hole 30, the upper air chamber 23, the air port 32 and the cylinder passage 2 Inside, the driving rod 13 on the driving piston 12 quickly fires the nail, thereby forming a trigger valve configuration technology that can quickly fire the nail after the trigger 6 is pressed; at the same time, the middle air-stop gasket 47 of the movable valve 4 will Close the inner valve hole 31, so that the high-pressure air in the upper air chamber 23 cannot be loaded into the exhaust hole 33 and the exhaust flow channel 22, so that the high-pressure air pressure in the upper air chamber 23 can be avoided, and the stability of rapid nailing can be maintained. sex.

In addition, after firing the nail, the operator releases the trigger 6, and the valve rod 35 is quickly returned to its original position (as shown in FIG. 4 ) by the restoring force of the inner spring 8, and the recoverable pipe hole 54 communicates with the air groove 56 and Guide high-pressure air into the state of pressure accumulation in the lower air chamber 24 to push the movable valve 4 back to the upward position (as shown in Figures 1 and 5); in Figure 5, it is revealed that after the movable valve 4 is reset, the main valve The hole 30 is closed, and the high-pressure air can no longer enter the upper air chamber 23, and the inner valve hole 31 is opened, and communicates with the passage between the air vent 32 and the exhaust hole 33, so that the remaining high-pressure air in the top air chamber 14 after nailing can be Through the cylinder channel 2, the air port 32, the upper air chamber 23, the air guide groove 43 and the exhaust hole 33, it is introduced into the exhaust flow channel 22 of the gun body 1 and discharged to the outside; , the high-pressure air discharged from the bottom air chamber 15 into the return air chamber 17 will return to the bottom air chamber 15, so that the pressure in the top air chamber 14 is lower than the bottom air chamber 15, so as to push the piston 12 and its nailing Rod 13 returns to the preliminary nailing position upwards, and completes the single operation cycle of nailing.

The present invention adopts the above-mentioned structure, especially the arrangement design that the direction of opening the movable valve downward is the same as the direction in which the high-pressure air enters the trigger valve, so that the opening resistance of the movable valve can be reduced when the nail is driven, and the buckle can be raised. Immediately after the trigger is triggered, the agility of firing the nail and the smoothness of opening the valve are improved to a certain extent compared with the traditional technology.

The above descriptions are only preferred feasible embodiments of the present invention, so all equivalent changes made according to the scope of the claims of the present invention should be included in the protection scope of the present invention.

Claims (13)

1, a kind of trigger valve of ailing machine is provided with a cylinder in the rifle body head of ailing machine, is provided with the nail hitting bar of piston and bottom thereof in the cylinder, and piston will be separated into a top layer air chamber and a bottom air chamber in the cylinder; Top layer air chamber one end is provided with a cylinder channel and is connected with a trigger valve; Bottom air chamber bottom is communicated to a backhaul air chamber through a passage; The rifle body is held air inlet runner and the grate flow channel that is provided with a pressure-air in the portion; Include a valve body in the trigger valve, it is fixedly arranged between described air inlet runner, grate flow channel and the cylinder channel; The valve body top is provided with a main valve hole, and it is connected with air inlet runner; Valve interior wall is provided with valve opening in, and has an at least one blow vent and a steam vent on the valve body end wall, and this blow vent is connected with cylinder channel, and this steam vent is connected with grate flow channel; Trigger valve bottom hub setting has a press fastening type trigger; It is characterized in that, include at least in the valve body of described trigger valve:

One moving valve is formed with valve portion and lower valve portion on the valve, valve inner is distinguished into upper chamber and lower chamber; Be formed with the air slot of necking down shape between the upper and lower valve portion, the activity slippage in the interior valve opening of described valve body of the rib wall of air slot, and the moving valve top is provided with an air admission hole, and it is connected with a guide groove in the moving valve;

One valve seat is located at described valve body bottom, is formed with a convex valve pipe and a ring portion on the valve seat; The top of this valve pipe is formed with a neck hole, can be connected with formed pore in the valve pipe; And the valve pipe can be inserted in the guide groove of above-mentioned moving valve, and air admission hole, guide groove, neck hole and pore are connected; At least be provided with a gas port on this ring portion wall simultaneously, lower chamber is connected with formed air drain in the ring portion;

One valve rod, an end is implanted in the valve seat, and the other end contacts on trigger; And

One inner spring, it is located in the pore of described valve seat, and presses and touch on valve rod.

2, the trigger valve of ailing machine according to claim 1 is characterized in that: the described outer wall of going up valve portion is provided with the upper strata on keying opportunity of the main valve hole of a control valve body and ends airfilled ring.

3, the trigger valve of ailing machine according to claim 1 is characterized in that: the described outer wall of going up valve portion is provided with the middle level on keying opportunity of the interior valve opening of a control valve body and ends airfilled ring.

4, the trigger valve of ailing machine according to claim 1 is characterized in that: the outer wall of described lower valve portion is provided with one and prevents that the bottom that lower chamber is connected with steam vent from ending airfilled ring.

5, the trigger valve of ailing machine according to claim 1 is characterized in that: the guide groove inwall of described lower valve portion is provided with the control guide groove and ends airfilled ring with the internal layer that is communicated with opportunity between lower chamber.

6, the trigger valve of ailing machine according to claim 1 is characterized in that: described valve rod is not by before the clinching, and it is sheathed in the valve seat air drain and contacts inner spring, and pore is connected with air drain.

7, the trigger valve of ailing machine according to claim 1 is characterized in that: described valve rod is implanted in after clinching and pushes inner spring in the pore, and the passage between sealing pore and air drain.

8, the trigger valve of ailing machine according to claim 1 is characterized in that: described valve rod bar wall is provided with a control valve seat inner orifice and ends airfilled ring with the leading portion that is communicated with opportunity between air drain.

9, the trigger valve of ailing machine according to claim 1 is characterized in that: described valve seat bottom is provided with a bearing sleeve, wears described valve rod in order to activity.

10, the trigger valve of ailing machine according to claim 9 is characterized in that: have an air cleft between the trepanning hole wall of described valve rod bar wall and bearing sleeve, be communicated with lower chamber and ambient atmosphere.

11, the trigger valve of ailing machine according to claim 10 is characterized in that: described valve rod bar wall is provided with the stage casing on keying opportunity of a control air cleft and ends airfilled ring.

12, the trigger valve of ailing machine according to claim 1 is characterized in that: be provided with an outer spring in the lower chamber between described valve seat and the moving valve and hold moving valve.

13, the trigger valve of ailing machine according to claim 1 is characterized in that: described valve body bottom is provided with a trigger housing, in order to the described trigger of hub setting.

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