CN212123139U

CN212123139U - Switch assembly for quickly controlling gas circuit switching

Info

Publication number: CN212123139U
Application number: CN202020552825.5U
Authority: CN
Inventors: 吴晓军; 牟宇龙; 杨发正; 孙文茂; 陈振华
Original assignee: Zhejiang Rongpeng Air Tools Co Ltd
Current assignee: Zhejiang Rongpeng Air Tools Co Ltd
Priority date: 2020-04-15
Filing date: 2020-04-15
Publication date: 2020-12-11
Anticipated expiration: 2030-04-15

Abstract

A switch assembly for rapidly controlling gas circuit switching comprises a switch seat, wherein a mounting groove is formed in the side wall of the right side of the switch seat; a valve sleeve clapboard attached to the bottom of the mounting groove is arranged in the mounting groove, and a vent hole is formed in the center of the valve sleeve clapboard; the switch seat is provided with an exhaust structure matched with the vent hole; the center of the side wall of the left side of the switch seat is provided with a telescopic hole communicated with the mounting groove; a switch rod matched with the telescopic hole is arranged in the telescopic hole; the right side of the switch seat is provided with a valve sleeve matched with the switch seat, and the left end of the valve sleeve penetrates into the mounting groove and is attached to the valve sleeve partition plate; the valve sleeve is provided with an air inlet communicated with the vent hole. The utility model discloses a switch assembly that quick control gas circuit switches can accomplish the switching of gas circuit fast after pulling the trigger, effectively avoids pulling the trigger too fast and leads to the firing pin not in time returning the normal position or the condition that firing pin strength percussion strength reduces.

Description

Switch assembly for quickly controlling gas circuit switching

Technical Field

The utility model relates to a switch assembly, especially a switch assembly of quick control gas circuit switching.

Background

The pneumatic nail rolling gun is a pneumatic tool for realizing the reciprocating impact of a firing pin on a nail by utilizing the pressure difference between compressed air and atmosphere, when a trigger is pulled by a worker, a switch assembly can control an air circuit to ensure that the firing pin can do reciprocating motion in a cylinder of the pneumatic nail rolling gun, when the firing pin moves towards the gun nozzle direction each time, one nail can be driven out of the gun nozzle to finish the nailing action, when the firing pin is reset, the next nailing can be carried out, the switch assembly of the traditional pneumatic nail rolling gun needs to move for a long distance if a switch rod of the switch assembly finishes the switching of the air circuit, so that the air circuit switching cannot be finished quickly, one end of buffer time is needed after the trigger is pulled to trigger the nail, the usability of the pneumatic nail rolling gun is influenced, when the air circuit switching cannot be finished quickly, once the worker pulls the trigger again too quickly after one nail is driven, it is easy to cause the striker not to return to the original position or the power of the striker to be reduced.

Disclosure of Invention

The utility model aims to solve the current technical problem and provide a switch assembly of quick control gas circuit switching, it can accomplish the switching of gas circuit fast after pulling the trigger, effectively avoids pulling the trigger too fast and leads to the firing pin not in time returning the normal position or the condition that firing pin strength percussion strength reduces.

The utility model provides a technical scheme that above-mentioned technical problem adopted does:

the utility model discloses a switch assembly of quick control gas circuit switching, including the switch seat, its characterized in that: the side wall of the right side of the switch seat is provided with an installation groove; a valve sleeve clapboard attached to the bottom of the mounting groove is arranged in the mounting groove, and a vent hole is formed in the center of the valve sleeve clapboard; the switch seat is provided with an exhaust structure matched with the vent hole; the center of the side wall of the left side of the switch seat is provided with a telescopic hole communicated with the mounting groove; a switch rod matched with the telescopic hole is arranged in the telescopic hole; the right side of the switch seat is provided with a valve sleeve matched with the switch seat, and the left end of the valve sleeve penetrates into the mounting groove and is attached to the valve sleeve partition plate; the valve sleeve is provided with an air inlet communicated with the vent hole; the outer wall of the valve sleeve is provided with a plurality of air transmission holes which are uniformly distributed in the circumferential direction and are communicated with the air inlet holes; the inner wall of the air inlet hole is provided with an annular limiting step, and the limiting step is positioned on the right side of the edge of the orifice at the inner end of the air inlet hole; the left end of the switch rod penetrates out of the telescopic hole leftwards, and the right end of the switch rod penetrates through the vent hole rightwards and penetrates into the air inlet hole; the outer wall of the right part of the switch rod is provided with a left limiting groove and a right limiting groove positioned on the right side of the left limiting groove; a left sealing ring matched with the left limiting groove is arranged in the left limiting groove, and the left sealing ring protrudes out of the left limiting groove and is attached to the right side wall of the valve sleeve partition plate; the right limit groove is internally provided with a right sealing ring matched with the right limit groove, the right sealing ring protrudes out of the right limit groove, the diameter of the right sealing ring is larger than the inner diameter of the limit step, and the right sealing ring is not attached to the limit step.

The exhaust structure comprises a plurality of exhaust holes which are uniformly arranged on the left side wall of the switch seat in a circumferential manner; an exhaust step is arranged at the bottom of the mounting groove, and an exhaust gap is formed between the exhaust step and the valve sleeve partition plate; the vent hole right-end orifice is positioned on the vent step.

The peripheral surface of the switch seat, the peripheral surface of the valve sleeve partition plate and the peripheral surface of the valve sleeve are provided with a plurality of annular grooves which are transversely and uniformly distributed; and an O-shaped ring matched with the annular groove is arranged in the annular groove.

The utility model has the advantages that:

compared with the prior art, the switch assembly adopting the structure of the utility model for rapidly controlling the gas circuit switching only needs to press the switch rod rightwards through the trigger, the switch rod can drive the left sealing ring to be separated from the right side wall of the valve sleeve clapboard at the first time and drive the right sealing ring to be attached on the limit step, at the moment, the gas circuit in the inflation stage is switched to the gas circuit in the exhaust stage, along with the switching of the gas circuit, the nailing action can be effectively realized, because the sealing of the left sealing ring and the right side wall of the valve sleeve clapboard is surface-to-surface, once the left sealing ring moves rightwards for a short distance, the air vent can be changed from the sealing state to the unblocked state, when the right sealing ring and the limit step are not attached, the clearance between the right sealing ring and the limit step is also extremely small, once the right sealing ring moves rightwards for a short, just can accomplish the switching of gas circuit, realize the effect of fast switch over gas circuit, make the firing pin can return fast and the secondary nailing after accomplishing a percussion nail, effectively avoid too fast the trigger to lead to the firing pin not in time returning to the normal position or the condition that firing pin strength percussion strength reduces.

Drawings

FIG. 1 is a cross-sectional view of the switch assembly for fast control of gas circuit switching of the present invention;

fig. 2 is a schematic structural diagram of the switch assembly for rapidly controlling gas circuit switching of the present invention;

fig. 3 is a cross-sectional view of the switch assembly for rapidly controlling gas circuit switching according to the present invention installed on the pneumatic coil nail gun and the pneumatic coil nail gun is in the inflation stage;

FIG. 4 is an enlarged view of section A of FIG. 3;

fig. 5 is a cross-sectional view of the switch assembly for rapidly controlling gas circuit switching according to the present invention installed on the pneumatic coil nail gun and the pneumatic coil nail gun is in the exhaust stage;

fig. 6 is an enlarged view of a portion B of fig. 5.

Detailed Description

The invention is described in further detail below with reference to the following figures and detailed description:

referring to fig. 1 to 6, the present invention provides a switch assembly for rapidly controlling gas circuit switching, which includes a switch base 1, wherein a mounting groove 2 is formed on a right side wall of the switch base 1; a valve sleeve clapboard 3 which is attached to the bottom of the mounting groove 2 is arranged in the mounting groove 2, and a vent hole 4 is arranged in the center of the valve sleeve clapboard 3; the switch base 1 is provided with an exhaust structure matched with the vent hole 4; the center of the side wall of the left side of the switch base 1 is provided with a telescopic hole 5 communicated with the mounting groove 2; a switch rod 6 matched with the telescopic hole 5 is arranged in the telescopic hole; a valve sleeve 7 matched with the switch seat 1 is arranged on the right side of the switch seat 1, and the left end of the valve sleeve 7 penetrates into the mounting groove 2 and is attached to the valve sleeve partition plate 3; the valve sleeve 7 is provided with an air inlet 8 communicated with the vent hole 4; the outer wall of the valve sleeve 7 is provided with a plurality of air delivery holes 9 which are uniformly distributed in the circumferential direction, and the air delivery holes 9 are communicated with the air inlet holes 8; the inner wall of the air inlet hole 8 is provided with an annular limiting step 10, and the limiting step 10 is positioned on the right side of the edge of the inner end orifice of the air inlet hole 8; the left end of the switch rod 6 penetrates out of the telescopic hole 5 leftwards, and the right end of the switch rod 6 penetrates through the vent hole 4 rightwards and penetrates into the air inlet hole 8; the outer wall of the right part of the switch rod 6 is provided with a left limiting groove 11 and a right limiting groove 12 positioned on the right side of the left limiting groove 11; a left sealing ring 13 matched with the left limiting groove 11 is arranged in the left limiting groove 11, and the left sealing ring 13 protrudes out of the left limiting groove 11 and is attached to the right side wall of the valve sleeve partition plate 3; and a right sealing ring 14 matched with the right limiting groove 12 is arranged in the right limiting groove 12, the right sealing ring 14 protrudes out of the right limiting groove 12, the diameter of the right sealing ring 14 is larger than the inner diameter of the limiting step 10, and the right sealing ring 14 is not attached to the limiting step 10.

The exhaust structure comprises a plurality of exhaust holes 15 which are uniformly arranged on the left side wall of the switch base 1 in a circumferential manner; an exhaust step 16 is arranged at the bottom of the mounting groove 2, and an exhaust gap 17 is formed between the exhaust step 16 and the valve sleeve partition plate 3; the right end opening of the exhaust hole 15 is positioned on the exhaust step 16.

The peripheral surface of the switch base 1, the peripheral surface of the valve sleeve partition plate 3 and the peripheral surface of the valve sleeve 7 are provided with a plurality of annular grooves 18 which are transversely and uniformly distributed; an O-shaped ring 19 matched with the annular groove 18 is arranged in the annular groove.

The utility model discloses a use method as follows:

the switch assembly is arranged in a switch hole 21 on the left side of the upper end of a gun handle 20 of a pneumatic nail coiling gun, the peripheral surfaces of a switch base 1 and a valve sleeve 7 are attached to the inner wall of the switch hole 21, when the pneumatic nail coiling gun is used, a quick connector 22 at the lower end of the gun handle 20 of the pneumatic nail coiling gun is connected with an air source, compressed air directly enters an air passage of the gun handle 20 through the quick connector 22, only an air inlet 8 of the valve sleeve 7 is communicated with the air passage of the gun handle 20 at the moment, the compressed air in the air passage of the gun handle 20 enters the air inlet 8 at the first time, the compressed air entering the air inlet 8 is responsible for pushing a switch rod 6 to the left, the switch rod 6 drives a left sealing ring 13 to be tightly pressed on the side wall on the right side of a valve sleeve partition plate 3 to ensure the sealing performance of an air vent 4, the compressed air cannot flow to the, the right sealing ring 14 is not attached to the limit step 10, so that high-pressure air flows to the air delivery hole 9 through a gap between the right sealing ring 14 and the limit step 10, the air delivery hole 9 is communicated with an air passage of an air cylinder 23 of the pneumatic nail coiling gun, compressed air enters the air passage of the air cylinder 23, and the pneumatic nail coiling gun is in an inflation stage at the moment.

When a nail needs to be nailed, the trigger can press the switch rod 6 rightwards only by pulling the trigger, the switch rod 6 moves rightwards along with the switch rod, when the switch rod 6 moves rightwards, the left sealing ring 13 and the right sealing ring 14 both move rightwards, when the right sealing ring 14 moves rightwards, the right sealing ring 14 can be attached to the limiting step 10, the limiting step 10 is positioned at the right side of the opening edge at the inner end of the air inlet hole 8, when the right sealing ring 14 is attached to the limiting step 10, the air inlet hole 8 is separated from the air delivery hole 9 by the right sealing ring 14, the air inlet hole 8 is not communicated with the air delivery hole 9, compressed air entering the air passage of the gun handle 20 can not enter the air delivery hole 9 through the air inlet hole 8, when the left sealing ring 13 moves rightwards, the left sealing ring 13 is not attached to the side wall of the valve sleeve partition plate 3, the air vent 4 at the center of the valve sleeve partition plate 3 is in a unblocked state, at the moment, compressed air in the air path of the air cylinder 23 is discharged to the outside through the air delivery hole 9, the vent hole 4, the exhaust gap 17 and the exhaust hole 15 in sequence, the pneumatic nail coiling gun is in an exhaust stage at the moment, when the pneumatic nail coiling gun exhausts, atmospheric pressure difference is generated, the firing pin 24 in the air cylinder 23 can be effectively ejected leftwards by utilizing the compressed air and the atmospheric pressure difference, and therefore the nail is fired from the gun nozzle, and the nailing action is completed.

In conclusion, the utility model can be known by only pressing the switch lever 6 by the trigger right, the switch lever 6 can take the left sealing ring 13 to separate from the right side wall of the valve sleeve clapboard 3 for the first time, take the right sealing ring 14 to attach to the limit step 10, at the moment, the gas circuit in the inflation stage is switched to the gas circuit in the exhaust stage, along with the switching of the gas circuit, the nailing action can be effectively realized, because the sealing of the left sealing ring 13 and the right side wall of the valve sleeve clapboard 3 is surface-to-surface, once the left sealing ring 13 moves to the right for a short distance, the vent hole 4 can be changed from the sealing state to the unblocked state, when the right sealing ring 14 and the limit step 10 do not attach, the gap between the right sealing ring 14 and the limit step 10 is also extremely small, once the right sealing ring 14 moves to the right for a short distance, the right sealing ring 14 can, just can accomplish the switching of gas circuit, realize the effect of fast switch over gas circuit, make firing pin 24 can return fast and the secondary nailing after accomplishing a percussion nail, effectively avoid pulling the trigger too fast and lead to firing pin 24 not in time to return the normal position or the condition that firing pin 24 strength percussion strength reduces.

Switch seat 1 outer peripheral face, 3 outer peripheral faces of valve barrel baffle, valve barrel 7 outer peripheral faces all are equipped with a plurality of ring channels 18 that are horizontal evenly distributed, be equipped with in the ring channel 18 rather than assorted O type circle 19, the existence of O type circle 19 can effectively improve the leakproofness between switch seat 1 and the switch hole 21, the leakproofness between valve barrel baffle 3 and the switch seat 1, the leakproofness between switch seat 1 and the valve barrel 7, effectively avoid leaking gas and lead to the condition that the atmospheric pressure unstability influences the nailing effect.

Claims

1. The utility model provides a switch assembly that quick control gas circuit switches, includes the switch seat, its characterized in that: the side wall of the right side of the switch seat is provided with an installation groove; a valve sleeve clapboard attached to the bottom of the mounting groove is arranged in the mounting groove, and a vent hole is formed in the center of the valve sleeve clapboard; the switch seat is provided with an exhaust structure matched with the vent hole; the center of the side wall of the left side of the switch seat is provided with a telescopic hole communicated with the mounting groove; a switch rod matched with the telescopic hole is arranged in the telescopic hole; the right side of the switch seat is provided with a valve sleeve matched with the switch seat, and the left end of the valve sleeve penetrates into the mounting groove and is attached to the valve sleeve partition plate; the valve sleeve is provided with an air inlet communicated with the vent hole; the outer wall of the valve sleeve is provided with a plurality of air transmission holes which are uniformly distributed in the circumferential direction and are communicated with the air inlet holes; the inner wall of the air inlet hole is provided with an annular limiting step, and the limiting step is positioned on the right side of the edge of the orifice at the inner end of the air inlet hole; the left end of the switch rod penetrates out of the telescopic hole leftwards, and the right end of the switch rod penetrates through the vent hole rightwards and penetrates into the air inlet hole; the outer wall of the right part of the switch rod is provided with a left limiting groove and a right limiting groove positioned on the right side of the left limiting groove; a left sealing ring matched with the left limiting groove is arranged in the left limiting groove, and the left sealing ring protrudes out of the left limiting groove and is attached to the right side wall of the valve sleeve partition plate; the right limit groove is internally provided with a right sealing ring matched with the right limit groove, the right sealing ring protrudes out of the right limit groove, the diameter of the right sealing ring is larger than the inner diameter of the limit step, and the right sealing ring is not attached to the limit step.

2. The switch assembly for rapidly controlling gas circuit switching according to claim 1, wherein: the exhaust structure comprises a plurality of exhaust holes which are uniformly arranged on the left side wall of the switch seat in a circumferential manner; an exhaust step is arranged at the bottom of the mounting groove, and an exhaust gap is formed between the exhaust step and the valve sleeve partition plate; the vent hole right-end orifice is positioned on the vent step.

3. The switch assembly for rapidly controlling gas circuit switching according to claim 1, wherein: the peripheral surface of the switch seat, the peripheral surface of the valve sleeve partition plate and the peripheral surface of the valve sleeve are provided with a plurality of annular grooves which are transversely and uniformly distributed; and an O-shaped ring matched with the annular groove is arranged in the annular groove.