Gas nozzle and gas nozzle structure of gas nail driver

Abstract

The present invention discloses a gas nozzle for a gas nail driver, and relates to the technical field of gas nozzles for electric gas nail drivers. The gas nozzle for a gas nail driver comprises: a gas nozzle body, an anti-rotation boss, an adjusting nut, a sealing member and a limiting member; the adjusting nut is sleeved on the outer periphery of the gas nozzle body through the cooperation between the internal thread and the external thread; the gas nozzle body is provided with an air leakage hole, which is connected with a hollow cavity; the sealing member is arranged in a groove and fits the outer periphery of the gas nozzle body, and the sealing member is used to open or seal the air leakage hole when the adjusting nut moves in the axial direction relative to the gas nozzle body; the anti-rotation boss is used to limit the gas nozzle body when the adjusting nut rotates, and the limiting member is used to limit the moving range of the adjusting nut in the axial direction relative to the gas nozzle body. This solves the problem that the existing gas nail driver cannot ignite and burn or has low combustion efficiency due to the ratio of combustible gas to oxygen exceeding the combustible range under different ambient temperatures and altitudes.

Description

Technical Field

[0001] The invention relates to the technical field of gas nail drivers, and in particular to a gas nozzle and a gas nozzle structure of a gas nail driver. Background Art

[0002] The gas nail driver works by injecting a certain amount of combustible gas into the combustion chamber through a special aerosol can to mix with the air in the combustion chamber, and then igniting, burning and exploding to push the piston to reciprocate. There is a metering valve on the aerosol can. Every time the gas nail driver works, the metering valve sprays a certain amount of combustible gas into the combustion chamber through the gas nozzle installed on the gas nail driver. The combustible gas is mixed with the air in the combustion chamber, and the mass ratio of the combustible gas to the oxygen must be within a specific range before it can ignite and burn. If the ratio is too low or too high, it cannot ignite and burn.

[0003] For a specific gas nail driver, the volume of its combustion chamber is fixed, and the amount of combustible gas sprayed by the metering valve on the aerosol can is also fixed. The ratio of the volume of the combustion chamber to the mass of the combustible gas sprayed by the metering valve each time is fixed. Due to the difference in ambient temperature and altitude, the mass of oxygen contained in the air under the same volume is different. In this way, under different ambient temperatures and altitudes, the ratio of the mass of oxygen contained in the air in the combustion chamber to the mass of the combustible gas sprayed by the metering valve will change, which may eventually cause the ratio of combustible gas to oxygen to exceed the combustible range and fail to ignite and burn, or even near the edge of the combustible range, its combustion efficiency is relatively low.

[0004] In order to achieve effective ignition and high combustion efficiency, the ratio of combustible gas to oxygen should be fixed at a certain efficient ratio value. Therefore, it is necessary to improve the existing technology, propose a more reasonable technical solution, and solve the problems existing in the existing technology. Summary of the invention

[0005] To solve the problem that when using existing gas nailers at different ambient temperatures and altitudes, the ratio of the oxygen mass contained in the air in the combustion chamber to the combustible gas mass ejected by the metering valve will change, which may eventually cause the ratio of combustible gas to oxygen to exceed the combustible range and fail to ignite or have low combustion efficiency.

[0006] In a first aspect, an embodiment of the present invention provides a gas nozzle for a gas nail driver, the gas nozzle comprising: a gas nozzle body, an anti-rotation boss, an adjusting nut, a sealing member and a limiting member; wherein,

[0007] The outer circumference of the air valve body is provided with an external thread, the inner ring of the adjusting nut is provided with an internal thread matching the external thread, and the adjusting nut is sleeved on the outer circumference of the air valve body through the matching sleeve between the internal thread and the external thread; the air valve body is provided with a hollow cavity, and the air valve body is provided with an air vent, which is connected to the hollow cavity; a groove is provided on the side of the adjusting nut close to the air valve body, a sealing member is provided in the groove and fits the outer circumference of the air valve body, and the sealing member is used to open or seal the air vent when the adjusting nut moves in the axial direction relative to the air valve body; the anti-rotation boss and the limit member are respectively provided at both ends of the air valve body, the anti-rotation boss is used to limit the air valve body when the adjusting nut rotates, and the limit member is used to limit the movement range of the adjusting nut relative to the axial direction of the air valve body.

[0008] Preferably, the groove is an annular groove, the sealing member is a sealing ring, the sealing ring is arranged in the annular groove, and the inner circumference of the sealing ring is in contact with the air nozzle body.

[0009] Preferably, the sealing ring is made of a flexible material.

[0010] Preferably, the diameter of the air nozzle body where the air leakage hole is provided is larger than the inner diameter of the sealing ring, and the width of the sealing ring is larger than the width of the air leakage hole along the axial direction of the air nozzle body.

[0011] Preferably, the height of the side wall of the annular groove close to the limit member is smaller than the height of the side wall away from the limit member, and the sealing ring is provided with a snap-fitting opening, which snaps into the top surface of the side wall of the annular groove close to the limit member, so that the end face of the sealing ring close to the limit member and the end face of the adjusting nut close to the limit member are in the same plane.

[0012] Preferably, the limiting member is provided with an air nozzle hole, the air nozzle hole is communicated with the hollow cavity, and the air nozzle hole is used for an external nozzle.

[0013] In the second aspect, the embodiment of the present invention proposes a

[0014] An air nozzle structure applied to a gas nail driver, when the air nozzle structure is working, an aerosol can and a metering valve are arranged outside the air nozzle structure, and the air nozzle structure comprises: a motor base, a cylinder, a sliding sleeve, a sliding sleeve cover, a piston and the air nozzle proposed in the above embodiment; wherein, the air nozzle is connected to the motor base, and the motor base, the sliding sleeve, the sliding sleeve cover, the piston and the cylinder are assembled to form a combustion chamber, the piston is arranged in the cylinder, the motor base is provided with an injection channel and the injection channel is connected to the combustion chamber, the air nozzle body is connected to the motor base and the hollow cavity is connected to the injection channel; the aerosol can is connected to the air nozzle hole through the nozzle on the metering valve.

[0015] Preferably, the motor seat is provided with an external connection hole, and a groove matching the anti-rotation boss is arranged in the external connection hole, and the external connection hole is connected with the jet channel; the air nozzle body is arranged in the external connection hole, and the air nozzle body is connected to the motor seat through the cooperation between the anti-rotation boss and the groove.

[0016] Beneficial effects:

[0017] The gas nozzle body is provided with a vent hole. When venting is not required, the adjusting nut is rotated to drive the seal to block the vent hole, and the combustible gas ejected from the metering valve enters the combustion chamber through the hollow cavity. When the external ambient temperature increases or in high-altitude areas, the combustible gas entering the combustion chamber should be reduced; at this time, the adjusting nut is rotated to drive the seal to be in a partial blocking state, thereby reducing the amount of combustible gas entering the combustion chamber, reducing the combustible gas in the combustion chamber, and allowing the combustible gas entering to be fully burned. It is clear that the amount of combustible gas injected into the metering valve is usually designed according to the amount required in winter, that is, under normal circumstances, the amount of combustible gas injected is always greater than or equal to the amount required for combustion in the combustion chamber; the limiter is a limit protrusion, which is used to limit the range of movement of the adjusting nut relative to the axis of the gas nozzle body. By rotating the adjusting nut, the amount of gas discharged from the air vent can be adjusted, thereby adjusting the amount of combustible gas entering the combustion chamber, so that the combustible gas entering the combustion chamber can be fully burned. This solves the problem in the prior art that the ratio of the oxygen mass contained in the air in the combustion chamber to the combustible gas mass ejected by the metering valve will change under different ambient temperatures and altitudes, which may eventually cause the ratio of combustible gas to oxygen to exceed the combustible range, resulting in failure to ignite and burn or low combustion efficiency.

[0018] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented according to the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Also, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0020] Figure 1 : A schematic diagram of the structure of the gas nozzle provided in an embodiment of the present invention;

[0021] Figure 2 : A schematic diagram of the structure of the air nozzle structure proposed in an embodiment of the present invention when the air leakage hole is sealed;

[0022] Figure 3 : A schematic diagram of the structure of the air nozzle structure proposed in an embodiment of the present invention when the air leakage hole is opened;

[0023] Figure 4 : A cross-sectional view of the gas nozzle provided in an embodiment of the present invention;

[0024] Figure 5 : An axonometric view of the gas nozzle provided in an embodiment of the present invention;

[0025] Figure 6 : A schematic diagram of the structure of the adjusting nut provided in an embodiment of the present invention;

[0026] Figure 7 : A schematic diagram of the structure of the sealing ring provided in an embodiment of the present invention;

[0027] Figure 8 : A schematic diagram of the structure of the motor base proposed in an embodiment of the present invention.

[0028] Icons: 100-air nozzle; 101-air nozzle body; 102-anti-rotation boss; 103-adjusting nut; 104-seal; 105-limiter; 106-external thread; 107-internal thread; 108-hollow cavity; 109-vent hole; 110-groove; 112-engaging mouth; 113-air nozzle hole; 200-air nozzle structure; 201-motor seat; 202-cylinder; 203-combustion chamber; 204-aerosol can; 205-metering valve; 206-piston; 207-injection channel; 208-external hole; 209-groove; 210-sleeve cover 210; 211-sleeve. DETAILED DESCRIPTION

[0029] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. It should be noted that although the description of these embodiments is used to help understand the present invention, it does not constitute a limitation of the present invention.

[0030] For the first aspect, see Figures 1 to 8 In order to achieve effective ignition of the gas nailer and high combustion efficiency of the combustible gas, the ratio of the combustible gas to oxygen should be fixed at a certain efficient ratio value, that is, the ratio of the combustible gas to oxygen injected into the combustion chamber 203 should change accordingly under different ambient temperatures and altitudes. In order to solve the problem that the combustible gas cannot be ignited and burned or has low combustion efficiency in the combustion chamber 203 due to different oxygen contents in the air caused by ambient temperature and altitude, the present invention proposes a gas nozzle 100 for a gas nailer, the gas nozzle 100 comprising: a gas nozzle body 101, an anti-rotation boss 102, an adjusting nut 103, a sealing member 104 and a stopper 105.

[0031] The outer circumference of the air nozzle body 101 is provided with an external thread 106, the inner ring of the adjusting nut 103 is provided with an internal thread 107 matching the external thread 106, and the adjusting nut 103 is sleeved on the outer circumference of the air nozzle body 101 through the cooperation between the internal thread 107 and the external thread 106; the air nozzle body 101 is provided with a hollow cavity 108, and the air nozzle body 101 is provided with an air leakage hole 109, and the air leakage hole 109 is connected with the hollow cavity 108; the adjusting nut 103 is provided with a groove 110 on one side close to the air nozzle body 101, The seal 104 is arranged in the groove 110 and fits with the outer periphery of the air valve body 101. The seal 104 is used to open or seal the air leakage hole 109 when the adjusting nut 103 moves in the axial direction relative to the air valve body 101; the anti-rotation boss 102 and the limiter 105 are respectively arranged at both ends of the air valve body 101. The anti-rotation boss 102 is used to limit the air valve body 101 when the adjusting nut 103 rotates, and the limiter 105 is used to limit the movement range of the adjusting nut 103 relative to the axial direction of the air valve body 101.

[0032] In this embodiment, the air nozzle body 101 is provided with an air leakage hole 109. When air leakage is not required, the adjusting nut 103 is rotated to drive the seal 104 to block the air leakage hole 109, and the combustible gas ejected from the metering valve 205 can enter the combustion chamber 203 through the hollow cavity 108. Among them, by adjusting the screw-in distance of the external thread 106 and the internal thread 107, the control accuracy of the opening and closing of the air leakage hole 109 by the adjusting nut 103 can be improved, that is, the opening and closing degree of the air leakage hole 109 is controlled by the number of rotations of the adjusting nut 103. When the external environment temperature increases or in a high altitude area, the combustible gas entering the combustion chamber 203 should be reduced; at this time, the adjusting nut 103 is rotated to drive the seal 104 to partially open the air leakage hole 109, reduce the amount of combustible gas entering the combustion chamber 203, reduce the combustible gas in the combustion chamber 203, and then make the combustible gas entering the combustion chamber 203 fully burn. It is clear that the amount of combustible gas injected into the metering valve 205 is usually designed according to the amount required in winter. In general, the amount of combustible gas injected is always greater than or equal to the amount required for combustion in the combustion chamber 203. The limiter 105 is a limiter protrusion, which is used to limit the movement range of the adjusting nut 103 relative to the axial direction of the gas nozzle body 101. By rotating the adjusting nut 103, the amount of gas leakage of the gas leakage hole 109 can be adjusted to adjust the amount of combustible gas entering the combustion chamber 203, so that the combustible gas entering the combustion chamber 203 can be fully burned, thereby solving the problem in the prior art that the ratio of the oxygen mass contained in the air in the combustion chamber to the combustible gas mass ejected by the metering valve will change under different ambient temperatures and altitudes, which may eventually cause the ratio of combustible gas to oxygen to exceed the combustible range and fail to ignite or have low combustion efficiency.

[0033] Preferably, the groove 110 is an annular groove 110 , and the sealing member 104 is a sealing ring. The sealing ring is disposed in the annular groove 110 , and the inner circumference of the sealing ring is in contact with the air nozzle body 101 .

[0034] In this embodiment, in order to ensure that the seal 104 can linearly adjust the opening and closing degree of the air leakage hole 109 when the adjusting nut 103 is rotated, the groove 110 is an annular groove 110, and the seal 104 is a sealing ring, which is arranged in the annular groove 110, and the inner circumference of the sealing ring is in contact with the air nozzle body 101.

[0035] Preferably, the sealing ring is made of a flexible material.

[0036] In order to ensure the sealing effect of the sealing ring on the air leakage hole 109, the sealing ring is made of a flexible material; for example, flexible plastic or flexible rubber.

[0037] Preferably, the diameter of the air nozzle body 101 where the air leakage hole 109 is opened is larger than the inner diameter of the sealing ring, and the width of the sealing ring is larger than the width of the air leakage hole 109 along the axial direction of the air nozzle body 101 .

[0038] The sealing ring is made of a flexible material. In order to improve the strength of the air nozzle body 101 and improve the sealing performance of the sealing ring on the air leakage hole 109, the diameter of the air nozzle body 101 where the air leakage hole 109 is opened is larger than the inner diameter of the sealing ring; at the same time, in order to enable the sealing ring to completely seal the air leakage hole 109, the width of the sealing ring should be larger than the width of the air leakage hole 109 along the axial direction of the air nozzle body 101. The caliber of the air leakage hole 109 can be circular, square or other irregular shapes.

[0039] Preferably, the side wall height of the annular groove 110 close to the limit member 105 is smaller than the side wall height away from the limit member 105, and the sealing ring is provided with a snap-fitting opening 112, which snaps into the top surface of the side wall of the annular groove 110 close to the limit member 105, so that the end face of the sealing ring close to the limit member 105 and the end face of the adjusting nut 103 close to the limit member 105 are in the same plane.

[0040] In order to ensure the stability of the connection between the sealing ring and the adjusting nut 103, and prevent the sealing ring from being squeezed and falling off when the adjusting nut 103 is rotated, a snap-fitting opening 112 is provided on the sealing ring, which can improve the deformation strength of the sealing ring and prevent the sealing ring from being squeezed when the adjusting nut 103 and the limit member 105 are in contact.

[0041] Preferably, the limiting member 105 is provided with a nozzle hole 113 , which is in communication with the hollow cavity 108 , and is used for an external nozzle.

[0042] In order to ensure the connection strength between the limiter 105 and the external nozzle, a nozzle hole 113 is opened on the limiter 105; wherein the nozzle hole 113 is connected to the hollow cavity 108 to ensure that the combustible gas ejected from the external nozzle can quickly pass through the hollow cavity 108.

[0043] See also Figures 1 to 8 , an embodiment of the present invention proposes a gas nozzle structure 200 for a gas nail driver, comprising: a motor base 201, a cylinder 202, a sleeve 211, a sleeve cover 210, a piston 206 and the gas nozzle 100 proposed in the above embodiment; an external aerosol tank 204 and a metering valve 205 are provided during operation; wherein, the aerosol tank 204 is connected to the motor base 201, the motor base 201, the cylinder 202, the sleeve 211, the sleeve cover 210 and the piston 206 form a combustion chamber 203, the piston 206 is arranged in the cylinder 202, the motor base 201 is provided with an injection channel 207 and the injection channel 207 is communicated with the combustion chamber 203, the gas nozzle body 101 is connected to the motor base 201 and the hollow cavity 108 is communicated with the injection channel 207; the aerosol tank 204 is connected to the gas nozzle hole 113 through the nozzle on the metering valve 205.

[0044] The valve body 101 is provided with a vent hole 109. When venting is not required, the adjusting nut 103 is rotated to drive the seal 104 to block the vent hole 109, and the combustible gas ejected from the metering valve 205 can enter the combustion chamber 203 through the hollow cavity 108. Among them, by adjusting the screw-in distance of the external thread 106 and the internal thread 107, the control accuracy of the opening and closing of the vent hole 109 by the adjusting nut 103 can be improved, that is, the opening and closing degree of the vent hole 109 is controlled by the number of rotations of the adjusting nut 103. When the external environment temperature increases or in a high altitude area, the combustible gas entering the combustion chamber 203 should be reduced; at this time, the adjusting nut 103 is rotated to drive the seal 104 to partially open the vent hole 109, reduce the amount of combustible gas entering the combustion chamber 203, reduce the combustible gas in the combustion chamber 203, and then make the combustible gas entering the combustion chamber 203 fully burn. By rotating the adjusting nut 103, the amount of gas leakage from the gas leakage hole 109 can be adjusted, thereby adjusting the amount of combustible gas entering the combustion chamber 203 so that the combustible gas entering the combustion chamber 203 can be fully burned. This solves the problem in the prior art that the ratio of the oxygen mass contained in the air in the combustion chamber to the combustible gas mass ejected by the metering valve will change under different ambient temperatures and altitudes, which may eventually cause the ratio of combustible gas to oxygen to exceed the combustible range and fail to ignite or have low combustion efficiency.

[0045] Preferably, the motor base 201 is provided with an external hole 208, and a groove 209 matching the anti-rotation boss 102 is provided in the external hole 208, and the external hole 208 is connected to the jet channel 207; the air nozzle body 101 is arranged in the external hole 208, and the air nozzle body 101 is connected to the motor base 201 through the cooperation between the anti-rotation boss 102 and the groove 209.

[0046] The external connection hole 208 is provided to facilitate installation and removal of the air nozzle 100 ; meanwhile, the cooperation between the anti-rotation boss 102 and the groove 209 can ensure that the air nozzle body 101 does not rotate when the adjusting nut 103 rotates.

[0047] In short, the above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A gas nozzle for a gas nail driver, characterized in that: The gas nozzle comprises: a gas nozzle body, an anti-rotation boss, an adjusting nut, a sealing member and a limiting member; wherein, The outer circumference of the air valve body is provided with an external thread, the inner ring of the adjusting nut is provided with an internal thread matching the external thread, and the adjusting nut is sleeved on the outer circumference of the air valve body through the cooperation between the internal thread and the external thread; the air valve body is provided with a hollow cavity, and the air valve body is provided with an air leakage hole, and the air leakage hole is communicated with the hollow cavity; the adjusting nut is provided with a groove on the side close to the air valve body, and the sealing member is arranged in the groove and fits with the outer circumference of the air valve body, and the sealing member is used to open or seal the air leakage hole when the adjusting nut moves relative to the axial direction of the air valve body; the anti-rotation boss and the limit member are respectively arranged at two ends of the air valve body, the anti-rotation boss is used to limit the air valve body when the adjusting nut rotates, and the limit member is used to limit the movement range of the adjusting nut relative to the axial direction of the air valve body.

2. The gas nozzle of the gas nail driver according to claim 1, characterized in that: The groove is an annular groove, the sealing member is a sealing ring, the sealing ring is arranged in the annular groove, and the inner circumference of the sealing ring is in contact with the air nozzle body.

3. The gas nozzle of the gas nail driver according to claim 2, characterized in that: The sealing ring is made of flexible material.

4. The gas nozzle of the gas nail driver according to claim 3, characterized in that: The diameter of the air nozzle body where the air leakage hole is opened is larger than the inner diameter of the sealing ring, and the width of the sealing ring is larger than the width of the air leakage hole along the axial direction of the air nozzle body.

5. The gas nozzle of the gas nail driver according to claim 4, characterized in that: The height of the side wall of the annular groove on the side close to the limit member is smaller than the height of the side wall on the side away from the limit member, and the sealing ring is provided with a snap-fitting opening, which is snap-fitted to the top surface of the side wall of the annular groove on the side close to the limit member, so that the end surface of the sealing ring close to the limit member and the end surface of the adjusting nut close to the limit member are in the same plane.

6. The gas nozzle of the gas nail driver according to claim 5, characterized in that: The limiting component is provided with a nozzle hole, the nozzle hole is communicated with the hollow cavity, and the nozzle hole is used for an external nozzle.

7. A gas nozzle structure used for a gas nail driver, wherein the gas nozzle structure is provided with an aerosol can and a metering valve when in operation, and is characterized in that: The air nozzle structure comprises: a motor base, a cylinder, a sleeve, a sleeve cover, a piston and the air nozzle as claimed in claim 6; Wherein, the air nozzle is connected to the motor base, and the motor base, sleeve, sleeve cover, piston and cylinder are assembled to form a combustion chamber. The piston is arranged in the cylinder, the motor base is provided with an injection channel and the injection channel is connected to the combustion chamber, the air nozzle body is connected to the motor base and the hollow cavity is connected to the injection channel; the aerosol can is connected to the air nozzle hole through the nozzle on the metering valve.

8. The gas nozzle structure for a gas nail driver according to claim 7, characterized in that: The motor seat is provided with an external connection hole, and a groove matching the anti-rotation boss is arranged in the external connection hole, and the external connection hole is connected with the jet channel; the air nozzle body is arranged in the external connection hole, and the air nozzle body is connected to the motor seat through the cooperation between the anti-rotation boss and the groove.

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