Gas filling gun

Abstract

The utility model relates to the technical field of gas filling tools, in particular to a gas filling gun which comprises a gas filling gun main body, a piston assembly and a trigger, a gas channel is arranged in the gas filling gun main body, the piston assembly is movably arranged on the gas filling gun main body, and the gas channel is communicated or blocked through the trigger. The end, away from the piston assembly, of the gas filling gun body is used for being communicated with a rubber pipe, the gas filling gun body is communicated with the rubber pipe through a movable connector, a vent hole communicated with the gas channel is formed in the movable connector, and the movable connector is connected with the gas filling gun body through a locking assembly. The gas filling gun and the rubber pipe are stably connected together through the movable connector, the locking assembly for locking the movable connector is further arranged on the gas filling gun body, the connecting structure has the advantages of being firm in connection and exquisite in structure, and the risk of gas leakage caused by the fact that the rubber pipe is separated from the gas filling gun is greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of gas filling tools, in particular to a gas filling gun. Background Art

[0002] The LPG filling gun is a special tool for filling liquefied petroleum gas vehicles or cylinders, and is a matching liquefied petroleum gas filling machine. It is designed specifically for the filling machine. It is simple and easy to use with one-step operation. The humanized design is durable and suitable for repeated connection. It adopts copper, aluminum, and stainless steel structures and has excellent corrosion resistance.

[0003] The gas filling machine usually uses a hose to connect to the gas filling gun, but the connection structure between the gas filling gun and the hose in the existing technology is too simple, not firm, and easy to loosen, which greatly increases the risk of separation. Utility Model Content

[0004] The purpose of the present invention is to overcome the shortcomings and deficiencies of the prior art and to provide a gas filling gun. The present invention firmly connects the gas filling gun and the hose together through a movable joint, and there is also a locking assembly on the gas filling gun body for locking the movable joint. Such a connection structure has the advantages of a firm connection and a sophisticated structure, which greatly reduces the risk of leakage caused by the hose detaching from the gas filling gun.

[0005] The technical solution adopted by the present utility model is as follows: a gas gun, comprising a gas gun body, a piston assembly and a trigger, a gas channel being provided inside the gas gun body, the piston assembly being movably arranged on the gas gun body to connect or block the gas channel through the trigger, one end of the gas gun body away from the piston assembly being used to connect with a hose, the gas gun body being connected with the hose through a movable joint, a vent hole being provided inside the movable joint to connect with the gas channel, and the movable joint being connected to the gas gun body through a locking assembly.

[0006] The movable joint has an extension tube extending into the gas channel, and the locking assembly includes a plurality of rolling balls. The outer wall of the extension tube is provided with a plurality of pits adapted to the rolling balls, and the plurality of pits are evenly distributed along the circumference on the outer wall of the extension tube. One side of the rolling ball is against the pit and the other side is against the inner wall of the gas channel.

[0007] The air filling gun body is provided with a plurality of through holes for the balls to pass through, and the air filling gun body is also covered with a bushing for limiting the balls in the through holes. One side of the balls abuts against the pit and the other side abuts against the inner wall of the bushing.

[0008] The bushing is an annular cylindrical structure. The outer wall of the gas filling gun body is provided with a retaining ring abutting against one end of the bushing. The end of the bushing away from the retaining ring abuts against the movable joint.

[0009] At least one annular sealing ring is provided between the extension tube and the inner wall of the gas channel.

[0010] The inner wall of the vent hole is provided with an internal thread for connecting a hose.

[0011] A joint sealing ring is provided on the inner wall of the vent hole.

[0012] The material of the rolling ball is steel, and the retaining ring is stainless steel wire.

[0013] The beneficial effects of the present invention are as follows: the present invention firmly connects the gas gun and the hose together through a movable joint, and there is also a locking component on the gas gun body for locking the movable joint. Such a connection structure has the advantages of a firm connection and a sophisticated structure, which greatly reduces the risk of air leakage caused by the hose detaching from the gas gun, and also facilitates the installation and connection of the hose. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, without paying creative labor, other drawings obtained based on these drawings still fall within the scope of the present invention.

[0015] Figure 1 This is a schematic structural diagram of the gas filling gun of the utility model;

[0016] Figure 2 It is a cross-sectional schematic diagram of the utility model;

[0017] Figure 3 This is a partial cross-sectional view of the installation of the movable joint of the utility model;

[0018] In the figure, 1-gas gun body, 2-piston assembly, 3-trigger, 4-gas channel, 5-movable joint, 6-vent, 7-extension tube, 8-ball, 9-pit, 10-through hole, 11-bushing, 12-retaining ring, 13-annular sealing ring, 14-connector sealing ring, 15-internal thread. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be described in further detail below with reference to the accompanying drawings.

[0020] It should be noted that all expressions using "first" and "second" in the embodiments of the present invention are for the purpose of distinguishing two non-identical entities or non-identical parameters with the same name. It can be seen that "first" and "second" are only for the convenience of expression and should not be understood as limitations on the embodiments of the present invention. Subsequent embodiments will not explain this one by one.

[0021] The directional and positional terms used in this invention, such as "upper," "lower," "front," "back," "left," "right," "inner," "outer," "top," "bottom," and "side," are used solely to refer to the directions or positions in the accompanying drawings. Therefore, the directional and positional terms used are intended to illustrate and facilitate understanding of this invention and are not intended to limit the scope of protection of this invention.

[0022] like Figures 1 to 3 As shown in the figure, an embodiment of the present utility model is a gas gun, comprising a gas gun body 1, a piston assembly 2 and a trigger 3. A gas channel 4 is provided inside the gas gun body 1. The piston assembly 2 is movably arranged on the gas gun body 1 to connect or block the gas channel 4 through the trigger 3. The end of the gas gun body 1 away from the piston assembly 2 is used to connect the hose. The gas gun body 1 is connected to the hose through a movable joint 5. A vent 6 connected to the gas channel 4 is provided inside the movable joint 5. The movable joint 5 is connected to the gas gun body 1 through a locking assembly.

[0023] The beneficial effects of such a setting are as follows: the utility model firmly connects the gas gun and the hose together through a movable joint, and there is also a locking assembly on the gas gun body for locking the movable joint. Such a connection structure has the advantages of a firm connection and a sophisticated structure, which greatly reduces the risk of air leakage caused by the hose detaching from the gas gun, and also facilitates the installation and connection of the hose.

[0024] The working principle of the gas filling gun is as follows: by pulling the trigger, the piston assembly moves, the hole on the piston assembly is connected to the gas channel, and the gas flows out from the hole on the piston assembly.

[0025] It is further provided that the movable joint 5 has an extension tube 7 extending into the gas channel 4, the locking assembly includes a plurality of balls 8, the outer wall of the extension tube 7 is provided with a plurality of pits 9 adapted to the balls 8, and the plurality of pits 9 are evenly distributed circumferentially on the outer wall of the extension tube 7, one side of the ball 8 is against the pit 9 and the other side is against the inner wall of the gas channel 4.

[0026] The beneficial effects of this arrangement are as follows: the extension tube of the movable joint is abutted and limited in the gas channel of the gas filling gun body by the snap-fitting cooperation between the rolling ball and the pit, which has the advantages of a simple and stable connection structure.

[0027] It is further provided that the gas gun body 1 is provided with a plurality of through holes 10 for the balls 8 to pass through, and the gas gun body 1 is also covered with a bushing 11 for limiting the balls 8 in the through holes 10, and one side of the balls 8 abuts against the pit 9 and the other side abuts against the inner wall of the bushing 11.

[0028] The beneficial effects of this arrangement are as follows: the through hole is used to install and limit the ball. When the bushing is installed on the gas gun body, the ball is limited by the bushing in the through hole to form a clamping limit in the axial direction of the extension tube, and one side of the ball is still against the pit. The ball maintains the function of abutting and limiting the extension tube to prevent the extension tube from separating from the gas gun body. When the extension tube needs to be removed, the bushing is removed and the ball can roll out along the through hole, and then the ball releases the abutment limit on the extension tube, which has the advantages of firm abutment, easy disassembly and assembly, and ensuring a stable connection even under high pressure.

[0029] It is further provided that the bushing 11 is an annular cylindrical structure, the outer wall of the gas gun body 1 is provided with a retaining ring 12 abutting against one end of the bushing 11 , and the end of the bushing 11 away from the retaining ring 12 abuts against the movable joint 5 .

[0030] The beneficial effects of this arrangement are as follows: the retaining ring surrounds the outer wall of the air gun body to form a clamping connection, and the two ends of the bushing are abutted and limited by the retaining ring and the movable joint to prevent the bushing from moving. The bushing can maintain the limit on the rolling ball. When the bushing needs to be moved, it is only necessary to remove the retaining ring that is easy to disassemble and assemble, and there is no need to remove the bushing from the air gun body.

[0031] It is further provided that at least one annular sealing ring 13 is provided between the extension tube 7 and the inner wall of the gas channel 4 .

[0032] The beneficial effect of such a setting is as follows: the sealing performance of the connection between the vent hole and the air filling channel is improved by the annular sealing ring, thereby preventing air leakage.

[0033] It is further provided that the inner wall of the vent hole 6 is provided with an internal thread 15 for connecting a hose.

[0034] The beneficial effects of this arrangement are as follows: the end of the hose can be processed with an external thread that matches the internal thread on the inner wall of the vent hole, making disassembly and assembly easy and having good sealing performance.

[0035] It is further provided that a joint sealing ring 14 is provided on the inner wall of the vent hole 6 .

[0036] The beneficial effects of this arrangement are as follows: the sealing performance of the connection between the hose and the movable joint is improved by the joint sealing ring. When the hose and the vent are connected by plug-in connection, the hose is clamped between the joint sealing ring and the inner wall of the vent, and the joint sealing ring acts as a limit for the hose to prevent it from detaching.

[0037] It is further provided that the material of the rolling ball 8 is steel, and the retaining ring 12 is stainless steel wire.

[0038] The beneficial effects of this arrangement are as follows: the ball is made of steel, which has higher strength and further ensures the firmness of the connection structure and a long service life; the retaining ring is made of stainless steel wire, which is easy to bend and can be used repeatedly, reducing costs.

[0039] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the claims of the present invention are still within the scope covered by the present invention.

Claims

1. A gas filling gun, comprising a gas filling gun body (1), a piston assembly (2) and a trigger (3), wherein a gas passage (4) is provided inside the gas filling gun body (1), the piston assembly (2) is movably arranged on the gas filling gun body (1) and connects or blocks the gas passage (4) through the trigger (3), and the end of the gas filling gun body (1) away from the piston assembly (2) is used for connecting to a hose, characterized in that: The gas filling gun body (1) is connected to the hose via a movable joint (5), a vent hole (6) communicating with the gas channel (4) is provided inside the movable joint (5), and the movable joint (5) is connected to the gas filling gun body (1) via a locking assembly; an extension tube (7) is extended from the movable joint (5) toward the gas channel (4), and the locking assembly includes a plurality of balls (8), and the outer wall of the extension tube (7) is provided with a plurality of pits (9) adapted to the balls (8), and a plurality of holes (10) adapted to the balls (10) are provided. The pits (9) are evenly distributed along the circumferential direction on the outer wall of the extension tube (7), one side of the ball (8) is against the pit (9) and the other side is against the inner wall of the gas channel (4); the gas filling gun body (1) is provided with a plurality of through holes (10) for the ball (8) to pass through, and the gas filling gun body (1) is also covered with a bushing (11) for limiting the ball (8) in the through hole (10), one side of the ball (8) is against the pit (9) and the other side is against the inner wall of the bushing (11).

2. The gas filling gun according to claim 1, characterized in that: The bushing (11) is an annular cylindrical structure, and the outer wall of the gas gun body (1) is provided with a retaining ring (12) that abuts against one end of the bushing (11), and the end of the bushing (11) away from the retaining ring (12) abuts against the movable joint (5).

3. The gas filling gun according to claim 1, characterized in that: At least one annular sealing ring (13) is provided between the extension tube (7) and the inner wall of the gas channel (4).

4. The gas filling gun according to claim 1, characterized in that: The inner wall of the vent hole (6) is provided with an internal thread (15) for connecting a hose.

5. The gas filling gun according to claim 1, characterized in that: The inner wall of the vent hole (6) is provided with a joint sealing ring (14).

6. The gas filling gun according to claim 2, characterized in that: The rolling ball (8) is made of steel, and the retaining ring (12) is made of stainless steel wire.

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