Switching device of filling gun

Abstract

The utility model discloses a switching device of a filling gun, and relates to the technical field of adapters, the switching device of the filling gun comprises a first adapter, and the first adapter comprises an adapter pipe and a surrounding shield; a transfer port and a liquid feeding port are formed in the two ends of the transfer pipe in the extending direction of the transfer pipe respectively, a clamping structure is arranged at the position, close to the transfer port, of the periphery of the transfer pipe, the end of the filling gun can stretch into the transfer pipe, the filling gun is matched with the clamping structure in a clamped mode, and the liquid feeding port can stretch into the spout; the periphery of the transfer pipe is sleeved with the surrounding cover, an insertion groove is formed between the surrounding cover and the transfer pipe, the spout extends into the insertion groove and is connected with the periphery of the spout, or the insertion groove is used for the second adapter to extend into and is connected with the second adapter, and the second adapter is connected with the inner periphery of the spout; the switching device of the filling gun can be stably installed on the filling gun and can be stably fixed to the spout, stability is good, the switching device can be suitable for different types of liquid storage pots, and universality is good.

Description

Technical Field

[0001] The utility model relates to the technical field of adapter devices, in particular to an adapter device for a filling gun. Background Art

[0002] During vehicle production, vehicles, such as automobiles, must be filled with antifreeze before leaving the factory. To do this, the antifreeze is injected into the vehicle's reservoir via a filling gun. To ensure smooth injection of the antifreeze into the reservoir, the spout must be sealed during the injection process. Currently, an adapter is typically installed on the filling gun to seal the spout, thereby meeting the sealing requirements for antifreeze injection. However, existing adapters are difficult to stably install on the filling gun and to securely secure to the spout after insertion, resulting in poor stability and limited adaptability to different types of reservoirs. Utility Model Content

[0003] The main purpose of the utility model is to propose an adapter device for a filling gun, aiming to solve the technical problems that the adapter device is difficult to be firmly installed on the filling gun, difficult to be firmly fixed to the spout after being inserted into the spout, has poor reliability, is difficult to be applicable to different types of liquid storage pots, and has poor versatility.

[0004] To achieve the above-mentioned purpose, the present invention provides an adapter device for a filling gun, which is used to connect the filling gun to the spout of a liquid storage pot. The adapter device includes a first adapter, which includes:

[0005] An adapter tube, wherein an adapter port and a liquid delivery port are respectively formed at both ends of the adapter tube along its extension direction; a clamping structure is provided on the outer periphery of the adapter tube near the adapter port, the end of the filling gun can be inserted into the adapter tube, and the filling gun is engaged with the clamping structure, and the liquid delivery port can be inserted into the spout;

[0006] A protective cover is sleeved on the outer periphery of the adapter tube, and a plug-in slot with a notch facing the liquid delivery port is formed between the protective cover and the adapter tube. The plug-in slot is used for the spout to extend into and be connected to the outer periphery of the spout, or the plug-in slot is used for the second adapter to extend into and be connected to the second adapter, and the second adapter is connected to the inner periphery of the spout.

[0007] In one embodiment, a first thread segment is formed on the outer periphery of the spout, and a second thread segment is formed on the inner wall of the protective cover corresponding to the position of the insertion groove, and the second thread segment is threadably engaged with the second thread segment when the spout is extended into the insertion groove.

[0008] In one embodiment, the first adapter further includes a sealing structure, which is installed in the plug-in slot and is used to seal the spout when the spout is inserted into the plug-in slot.

[0009] In one embodiment, the sealing structure includes a first sealing gasket, which is arranged in the plug-in slot and sleeved on the outside of the adapter tube. The first sealing gasket is used to press against the spout when the spout is extended into the plug-in slot to seal the spout.

[0010] In one embodiment, the groove wall on the side of the plug-in groove opposite to the groove opening is a groove bottom wall, and the sealing structure also includes a second sealing gasket, which is located between the groove bottom wall and the first sealing gasket. The groove bottom wall is used to cooperate with the spout when the spout is extended into the plug-in groove to clamp the first sealing gasket and the second sealing gasket to seal the spout.

[0011] In one embodiment, a first thread segment is formed on the inner circumference of the spout, a second thread segment is formed on the inner wall of the protective cover at a position corresponding to the plug-in slot, the second adapter includes a mounting tube and a connecting tube connected to the mounting tube, a third thread segment is formed on the outer circumference of the mounting tube, a fourth thread segment is formed on the outer circumference of the connecting tube, the second thread segment is threadedly engaged with the third thread segment when the second adapter is extended into the plug-in slot, the connecting tube is extended into the spout and the first thread segment and the fourth thread segment are threadedly engaged.

[0012] In one embodiment, the second adapter further includes an abutment ring, which is arranged at the connection point between the mounting tube and the connecting tube, and the abutment ring is sleeved on the outer circumference of the mounting tube and the connecting tube, and is used to abut against one end of the protective cover close to the slot when the second adapter is extended into the plug-in slot.

[0013] In one embodiment, the transfer tube includes a transfer section, a funnel section, and a liquid delivery section that are sequentially connected, the funnel section is gradually tapered in the direction from the transfer section to the liquid delivery section, the transfer port is opened in the transfer section, the liquid delivery port is opened in the liquid delivery section, and the end of the liquid delivery end where the liquid delivery port is located extends out of the plug-in slot.

[0014] In one embodiment, the adapter tube and the enclosure are integrally formed.

[0015] In one embodiment, the filling gun is equipped with two clamping claws, and the clamping structure is a clamping ring arranged on the outer circumference of the adapter tube, and the clamping ring is clamped and matched with the two clamping claws.

[0016] The technical solution of the present invention is to provide a first adapter, and the end of the filling gun extends from the adapter port into the adapter tube, and the clamping structure outside the adapter tube is engaged with the filling gun, so that the first adapter can be fixed to the filling gun, which is simple, convenient, firm and reliable to install. A protective cover is provided on the outer periphery of the adapter tube, and a plug-in slot is formed between the protective cover and the adapter tube. The filling gun and the spout can be connected through the adapter tube, and the adapter device can be fixed to the spout by connecting the plug-in slot to the outer periphery of the spout. It is simple and convenient, and the plug-in slot can provide a limiting effect on the spout inserted therein, thereby improving the assembly stability of the first adapter and the spout, and further improving the assembly stability of the adapter device and the spout. The spout is inserted into the plug-in slot, and the spout can also be sealed by the plug-in slot, thereby meeting the sealing conditions required when filling antifreeze.

[0017] When it is necessary to adapt it to different spouts, a second adapter is provided. By inserting and connecting the second adapter into the plug-in slot, the second adapter can be connected and communicated with the first adapter. The second adapter is inserted into the spout and connected to the inner circumference of the spout, and the adapter device can be installed on the spout. The spout can provide a limiting effect on the second adapter inserted therein, thereby improving the assembly stability of the second adapter and the spout, thereby improving the assembly stability of the adapter device and the spout. The second adapter can also seal the spout when inserted into the spout, thereby meeting the sealing condition required when adding antifreeze. The adapter provided by the utility model can be applied to different liquid storage pots through the cooperation of the first adapter and the second adapter, and has good versatility. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] 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, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0019] Figure 1 A schematic structural diagram of an embodiment of the adapter device for a filling gun provided by the present invention, in which the second adapter is inserted into the insertion slot;

[0020] Figure 2 This is a structural schematic diagram of the first adapter in an embodiment of the adapter device of the filling gun provided by the present invention;

[0021] Figure 3 This is a structural schematic diagram of the first adapter in another perspective of an embodiment of the adapter device for the filling gun provided by the present invention;

[0022] Figure 4This is a structural schematic diagram of the second adapter in an embodiment of the adapter device of the filling gun provided by the present invention;

[0023] Figure 5 This is a structural schematic diagram of the second adapter in another perspective of an embodiment of the adapter device for the filling gun provided by the present invention;

[0024] Figure 6 This is a schematic diagram of the partial structure of a liquid storage pot with the first thread segment located on the periphery of the spout;

[0025] Figure 7 This is a structural schematic diagram of an embodiment of the adapter device of the filling gun provided by the present invention, in which the first filling head is installed on the filling gun.

[0026] Description of Figure Numbers:

[0027] 10. First adapter; 11. Adapter tube; 111. Adapter port; 112. Liquid delivery port; 113. Snap-fit ​​structure; 1131. Snap-fit ​​ring; 114. Adapter section; 115. Funnel section; 116. Liquid delivery section; 12. Protective cover; 121. Connecting groove; 122. Second threaded section; 13. Sealing structure; 131. First sealing gasket; 132. Second sealing gasket; 20. Second adapter; 21. Mounting tube; 211. Third threaded section; 22. Connecting tube; 221. Fourth threaded section; 23. Abutment ring; 30. Liquid storage pot; 31. Spout; 311. First threaded section; 40. Filling gun; 41. Snap-fit ​​claw.

[0028] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0030] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0031] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme in which A and B are satisfied at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0032] The present utility model provides a transfer device for a filling gun 40 .

[0033] See also Figures 1 to 7 In one embodiment of the present invention, the adapter device of the filling gun 40 is used to connect the filling gun 40 to the spout 31 of the liquid storage pot 30. The adapter device includes a first adapter 10. The first adapter 10 includes:

[0034] The transfer tube 11 has a transfer port 111 and a liquid delivery port 112 formed at both ends along its extension direction. A snap-fit ​​structure 113 is provided on the outer periphery of the transfer tube 11 near the transfer port 111. The end of the filling gun 40 can be inserted into the transfer tube 11, and the filling gun 40 is snap-fitted with the snap-fit ​​structure 113, so that the liquid delivery port 112 can be inserted into the spout 31.

[0035] The protective cover 12 is sleeved on the outer periphery of the adapter tube 11, and a plug-in groove 121 with a notch facing the liquid delivery port 112 is formed between the protective cover 12 and the adapter tube 11. The plug-in groove 121 is used for the spout 31 to extend into and be connected to the outer periphery of the spout 31, or the plug-in groove 121 is used for the second adapter 20 to extend into and be connected to the second adapter 20, and the second adapter 20 is connected to the inner periphery of the spout 31.

[0036] The technical solution of the present invention provides a first adapter 10, the end of the filling gun 40 extends from the adapter port 111 into the adapter tube 11, and the clamping structure 113 outside the adapter tube 11 is clamped and matched with the filling gun 40, so that the first adapter 10 can be fixed to the filling gun 40, which is simple and convenient to install and firm and reliable. A protective cover 12 is provided on the outer periphery of the adapter tube 11, and a plug-in groove 121 is formed between the protective cover 12 and the adapter tube 11. The filling gun 40 and the spout 31 can be connected through the adapter tube 11. By connecting the plug-in groove 121 to the outer periphery of the spout 31, the adapter device can be fixed to the spout 31, which is simple and convenient. The plug-in groove 121 can provide a limiting effect on the spout 31 inserted into it, thereby improving the assembly stability of the first adapter 10 and the spout 31, and further improving the assembly stability of the adapter device and the spout 31. The spout 31 is inserted into the plug-in groove 121, and the spout 31 can also be sealed by the plug-in groove 121, thereby meeting the sealing conditions required for filling antifreeze.

[0037] When it is necessary to adapt it to different spouts 31, a second adapter 20 is provided. By inserting and connecting the second adapter 20 into the insertion slot 121, the second adapter 20 can be connected and communicated with the first adapter 10, and the second adapter 20 is extended into the spout 31 and connected to the inner circumference of the spout 31, the adapter device can be installed on the spout 31, and the spout 31 can provide a limiting effect on the second adapter 20 extended therein, thereby improving the assembly stability of the second adapter 20 and the spout 31, thereby improving the assembly stability of the adapter device and the spout 31, and the second adapter 20 extended into the spout 31 can also seal the spout 31, thereby meeting the sealing conditions required when adding antifreeze. The adapter device provided by the utility model can be applied to different liquid storage pots 30 through the cooperation of the first adapter 10 and the second adapter 20, and has good versatility.

[0038] In one embodiment of the present invention, a first thread segment 311 is formed on the outer periphery of the spout 31, and a second thread segment 122 is formed on the inner wall of the protective cover 12 at a position corresponding to the insertion groove 121. When the spout 31 is extended into the insertion groove 121, the second thread segment 122 is threadably engaged with the second thread segment 122.

[0039] Specifically, if Figure 1 and Figure 2 As shown, the inner wall of the protective cover 12 is formed with a second thread segment 122, and the outer periphery of the spout 31 is formed with a first thread segment 311. Through the threaded cooperation between the second thread segment 122 and the first thread segment 311, the protective cover 12 can be quickly connected to the outer periphery of the spout 31 to fix the adapter to the spout 31 having the first thread segment 311 on the outer periphery. The adapter is simple and convenient to install.

[0040] In an embodiment of the present invention, the first adapter 10 further includes a sealing structure 13 , which is installed in the insertion groove 121 . The sealing structure 13 is used to seal the spout 31 when the spout 31 extends into the insertion groove 121 .

[0041] Specifically, if Figure 2 and Figure 3 As shown, a sealing structure 13 is provided in the plug-in slot 121. The sealing structure 13 can further seal the spout 31 when the spout 31 is extended into the plug-in slot 121, thereby further improving the sealing effect of the adapter on the spout 31 to ensure that the antifreeze liquid can be added under sealed conditions.

[0042] In one embodiment of the present invention, the sealing structure 13 includes a first sealing gasket 131, which is arranged in the plug-in groove 121 and is sleeved on the outer side of the adapter tube 11. The first sealing gasket 131 is used to press against the spout 31 when the spout 31 is extended into the plug-in groove 121 to seal the spout 31.

[0043] Specifically, if Figure 2 and Figure 3 As shown, a first sealing gasket 131 is provided on the outer side of the adapter tube 11, and the first sealing gasket 131 is arranged in the plug-in groove 121. Therefore, when the spout 31 is inserted into the plug-in groove 121, the spout 31 can be sealed by pressing the first sealing gasket 131 against the spout 31, and the structure is simple.

[0044] In one embodiment of the present invention, the groove wall on the side of the plug-in groove 121 opposite to the groove opening is the groove bottom wall, and the sealing structure 13 also includes a second sealing gasket 132, and the second sealing gasket 132 is located between the groove bottom wall and the first sealing gasket 131. The groove bottom wall is used to cooperate with the spout 31 when the spout 31 is extended into the plug-in groove 121 to clamp the first sealing gasket 131 and the second sealing gasket 132 to seal the spout 31.

[0045] Specifically, if Figure 2 and Figure 3 As shown, a second sealing gasket 132 is installed on the bottom wall of the groove. The second sealing gasket 132 is located between the first sealing gasket 131 and the bottom wall of the groove, and the second sealing gasket 132 is also sleeved on the outside of the transfer tube 11. When the first sealing gasket 131 is worn, the second sealing gasket 132 located between the bottom wall of the groove and the first sealing gasket 131 can continue to press against the spout 31, thereby ensuring the sealing effect of the spout 31 and higher reliability.

[0046] In one embodiment of the present invention, a first threaded segment 311 is formed on the inner periphery of the spout 31, a second threaded segment 122 is formed on the inner wall of the protective cover 12 at a position corresponding to the plug-in groove 121, the second adapter 20 includes a mounting tube 21 and a connecting tube 22 connected to the mounting tube 21, a third threaded segment 211 is formed on the outer periphery of the mounting tube 21, a fourth threaded segment 221 is formed on the outer periphery of the connecting tube 22, the second threaded segment 122 is threadedly engaged with the third threaded segment 211 when the second adapter 20 is extended into the plug-in groove 121, the connecting tube 22 is extended into the spout 31 and the first threaded segment 311 and the fourth threaded segment 221 are threadedly engaged.

[0047] Specifically, if Figure 4 and Figure 5 As shown, when the first threaded segment 311 is formed on the inner circumference of the spout 31, the mounting tube 21 of the second adapter 20 is inserted into the plug-in groove 121, and the third threaded segment 211 on the outer circumference of the mounting tube 21 cooperates with the second threaded segment 122 on the inner wall of the protective cover 12, so that the second adapter 20 can be connected to the inner wall of the protective cover 12, and then the connecting tube 22 of the adapter is inserted into the spout 31, and the fourth threaded segment 221 on the outer circumference of the connecting tube 22 cooperates with the first threaded segment 311 on the inner circumference of the spout 31, so that the second adapter 20 can be fixed to the spout 31, so that the adapter device can be fixed to the spout 31 having the first threaded segment 311 on the inner circumference, which is more applicable.

[0048] In one embodiment of the present invention, the second adapter 20 also includes an abutment ring 23, which is arranged at the connection point between the mounting tube 21 and the connecting tube 22, and the abutment ring 23 is sleeved on the outer periphery of the mounting tube 21 and the connecting tube 22. The abutment ring 23 is used to abut against one end of the protective cover 12 close to the slot when the second adapter 20 is extended into the plug-in slot 121.

[0049] Specifically, if Figure 4 and Figure 5 As shown, an abutment ring 23 is sleeved on the connection point between the adapter tube 11 and the connecting tube 22. When the mounting tube 21 is installed in the insertion groove 121, the abutment ring 23 can abut against the end of the enclosure 12 near the groove, thereby preventing the mounting tube 21 from being inserted too deeply into the insertion groove 121 and damaging the bottom wall of the enclosure 12. The abutment ring 23 can also abut against the spout 31. Moreover, when the second adapter 20 falls off from the first adapter 10, the abutment ring 23 abuts against the spout 31, preventing the second adapter 20 from falling into the liquid storage pot 30, thereby improving reliability.

[0050] In one embodiment of the present invention, the adapter tube 11 includes an adapter section 114, a funnel section 115 and a liquid delivery section 116 which are connected in sequence. The funnel section 115 is gradually tapered in the direction from the adapter section 114 to the liquid delivery section 116. The adapter port 111 is opened in the adapter section 114, and the liquid delivery port 112 is opened in the liquid delivery section 116. The end of the liquid delivery end where the liquid delivery port 112 is located extends out of the plug-in slot 121.

[0051] Specifically, if Figure 1 As shown, the adapter tube 11 includes an adapter section 114, a funnel section 115 and a liquid feeding section 116. The adapter section 114 is connected to the top of the funnel section 115, and the liquid feeding section 116 is connected to the bottom of the funnel section 115. The funnel section 115 is tapered from top to bottom. When the coolant flows through the tapered funnel section 115, the flow rate of the coolant will decrease, so that the coolant can be injected into the liquid storage pot 30 more smoothly.

[0052] In one embodiment of the present invention, the transfer tube 11 and the protective cover 12 are integrally formed. The integral formation of the transfer tube 11 and the protective cover 12 has better structural strength and higher reliability.

[0053] In one embodiment of the present invention, the filling gun is equipped with two clamping claws 41 , and the clamping structure 113 is a clamping ring 1131 arranged around the outer circumference of the transfer tube 11 . The clamping ring 1131 is clamped and matched with the two clamping claws 41 .

[0054] Specifically, if Figure 2 and Figure 3 As shown, by installing a clamping ring 1131 on the outer periphery of the adapter tube 11, when the adapter needs to be installed on the filling gun, it is only necessary to clamp the clamping block to the two clamping claws 41 on the filling gun to install the adapter on the filling gun, which is simple and convenient to install.

[0055] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made using the contents of the present invention specification and drawings under the technical concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A transfer device for a filling gun, characterized in that: The adapter is used to connect the filling gun to the spout of the liquid storage pot, and the adapter includes a first adapter, which includes: An adapter tube, wherein an adapter port and a liquid delivery port are respectively formed at both ends of the adapter tube along its extension direction; a clamping structure is provided on the outer periphery of the adapter tube near the adapter port, the end of the filling gun can be inserted into the adapter tube, and the filling gun is engaged with the clamping structure, and the liquid delivery port can be inserted into the spout; A protective cover is sleeved on the outer periphery of the adapter tube, and a plug-in slot with a notch facing the liquid delivery port is formed between the protective cover and the adapter tube. The plug-in slot is used for the spout to extend into and be connected to the outer periphery of the spout, or the plug-in slot is used for the second adapter to extend into and be connected to the second adapter, and the second adapter is connected to the inner periphery of the spout.

2. The adapter device for the filling gun according to claim 1, characterized in that: A first thread segment is formed on the outer periphery of the spout, and a second thread segment is formed on the inner wall of the enclosure corresponding to the position of the insertion groove. The second thread segment is threadably engaged with the second thread segment when the spout is extended into the insertion groove.

3. The adapter device for the filling gun according to claim 2, characterized in that: The first adapter also includes a sealing structure, which is installed in the plug-in slot and is used to seal the spout when the spout extends into the plug-in slot.

4. The adapter device for the filling gun according to claim 3, characterized in that: The sealing structure includes a first sealing gasket, which is arranged in the plug-in slot and sleeved on the outside of the adapter tube. The first sealing gasket is used to press against the spout when the spout is extended into the plug-in slot to seal the spout.

5. The adapter device for the filling gun according to claim 4, characterized in that: The groove wall on the side of the plug-in groove opposite to the groove opening is the groove bottom wall, and the sealing structure also includes a second sealing gasket, which is located between the groove bottom wall and the first sealing gasket. The groove bottom wall is used to cooperate with the spout when the spout is extended into the plug-in groove to clamp the first sealing gasket and the second sealing gasket to seal the spout.

6. The adapter device for the filling gun according to claim 1, characterized in that: A first thread segment is formed on the inner circumference of the spout, a second thread segment is formed on the inner wall of the protective cover at a position corresponding to the plug-in slot, the second adapter includes a mounting tube and a connecting tube connected to the mounting tube, a third thread segment is formed on the outer circumference of the mounting tube, a fourth thread segment is formed on the outer circumference of the connecting tube, the second thread segment is threadedly engaged with the third thread segment when the second adapter is extended into the plug-in slot, the connecting tube is extended into the spout and the first thread segment and the fourth thread segment are threadedly engaged.

7. The adapter device for the filling gun according to claim 6, characterized in that: The second adapter also includes an abutment ring, which is arranged at the connection point between the mounting tube and the connecting tube, and the abutment ring is sleeved on the outer circumference of the mounting tube and the connecting tube. The abutment ring is used to abut against one end of the protective cover close to the slot when the second adapter is extended into the plug-in slot.

8. The adapter device for the filling gun according to any one of claims 1 to 7, characterized in that: The transfer tube includes a transfer section, a funnel section and a liquid feeding section which are connected in sequence. The funnel section is gradually tapered in the direction from the transfer section to the liquid feeding section. The transfer port is opened in the transfer section. The liquid feeding port is opened in the liquid feeding section. The end of the liquid feeding end where the liquid feeding port is located extends out of the plug-in slot.

9. The adapter device for the filling gun according to any one of claims 1 to 7, characterized in that: The transfer tube and the enclosure are integrally formed.

10. The adapter device for the filling gun according to any one of claims 1 to 7, characterized in that: The filling gun is equipped with two clamping claws, and the clamping structure is a clamping ring arranged on the outer periphery of the adapter tube, and the clamping ring is clamped and matched with the two clamping claws.

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