Tire pressure gun capable of automatically inflating

Abstract

The utility model discloses a tire pressure gun capable of automatically inflating, which comprises a gun body, an air inlet channel, an air outlet channel and an inflating hose, the air inlet channel is used for being connected with a high-pressure air source, the inflating hose is fixed at the outlet end of the air outlet channel, and a valve core component is arranged between the air inlet channel and the air outlet channel. The gas gun is characterized in that a valve element driving mechanism and a driving control assembly are arranged in the gun body, the valve element driving mechanism is used for automatically driving the valve element assembly to move so as to achieve connection or disconnection between the gas inlet channel and the gas outlet channel, and the driving control assembly is used for controlling the valve element driving mechanism to work; the tire pressure gun has the advantages that the tire pressure gun can automatically inflate inflatable articles, so that the tire pressure gun is easy and convenient to use, and the inflation air pressure of the inflatable articles can be accurately controlled; and a display module is further arranged in the driving control assembly, so that a user can conveniently know the internal air pressure of the inflated object in real time during inflation, and the display module can be used for measuring the internal air pressure of the inflated object when the inflation object is not inflated.

Description

TECHNICAL FIELD

[0001] The utility model relates to a tire pressure gun for inflating, especially to a tire pressure gun of automatic inflation. BACKGROUND

[0002] The tire pressure gun is a tool for inflating the tire, the ball and other inflating articles. The gun body of the tire pressure gun is connected with the high pressure gas source, and is connected with the inflating article through the hose to realize the inflation. But the existing tire pressure gun needs to be manually operated when using, that is, the user needs to press the trigger on the gun body to inflate. For the large inflating article such as the automobile tire, the inflation time is long, and the trigger needs to be pressed during the inflation, which causes the user's hand to be tired and swollen. Moreover, although the pressure gauge is installed on the existing tire pressure gun, the inflation is completely relied on the manual operation, and the control of the inflation pressure is not accurate. For the small inflating article, the internal pressure is easy to be too large. SUMMARY

[0003] The utility model solves the technical problem to provide a tire pressure gun of automatic inflation, which can automatically inflate the inflating article, and accurately control the inflation pressure.

[0004] The utility model adopts the technical scheme that: a tire pressure gun of automatic inflation, including gun body, inlet channel, outlet channel and inflation hose, inlet channel be used for with high pressure gas source connection, inflation hose fixed in outlet end of outlet channel, inlet channel with outlet channel between be provided with valve core subassembly, the gun body in be provided with valve core drive mechanism and drive control subassembly, valve core drive mechanism be used for automatically drive valve core subassembly removal, to realize inlet channel with outlet channel between the communication or disconnect, drive control subassembly be used for control valve core drive mechanism work.

[0005] Further, the valve core subassembly includes a first valve core and a connecting channel arranged in the gun body, the connecting channel communicates the inlet channel and the outlet channel, and the first valve core is arranged in the connecting channel and sealingly and slidably fitted with the connecting channel.

[0006] Further, the first valve core is provided with a first sealing ring and a second sealing ring, the first valve core has a gap with the connecting channel, the first sealing ring is used to prevent the gas in the connecting channel from leaking to the outside, and the second sealing ring is close to the air inlet channel; when the valve core driving mechanism drives the first valve core to move towards the air inlet channel, the second sealing ring is separated from the connecting channel, and the air inlet channel is communicated with the air outlet channel through the connecting channel; when the valve core driving mechanism drives the first valve core to move away from the air inlet channel, the second sealing ring enters the connecting channel, and the air inlet channel is disconnected with the air outlet channel.

[0007] Further, the valve core driving mechanism comprises a motor, a cam and a spring, the motor is fixed in the gun body, the cam is fixed with the driving shaft of the motor, one end of the first valve core protrudes from the connecting channel and abuts against the outer circumferential surface of the cam, and the other end of the first valve core protrudes from the connecting channel and enters the air inlet channel, and the two ends of the spring are fixed with the air inlet channel and the other end of the first valve core respectively.

[0008] Further, the gun body is fixedly provided with a first contact switch and a second contact switch, and the cam is integrally provided with a contact protrusion protruding in the axial direction; when the contact protrusion contacts the first contact switch, the small-diameter portion of the cam abuts against the first valve core, so that the valve core assembly is in a closed state; when the contact protrusion contacts the second contact switch, the large-diameter portion of the cam abuts against the first valve core, so that the valve core assembly is in an open state; and the first contact switch and the second contact switch are electrically connected with the driving control assembly.

[0009] Further, the driving control assembly comprises a control module, a pressure setting module and a pressure sensor, the gun body is provided with a detection channel communicated with the air outlet channel, the pressure sensor is sealingly fixed on the detection channel and is used to detect the gas pressure in the air outlet channel, and the pressure sensor, the pressure setting module and the motor are electrically connected with the control module.

[0010] Further, the driving control assembly further comprises a display module, the display module is fixed on the gun body and is electrically connected with the control module.

[0011] Further, the driving control assembly further comprises a power supply assembly, the power supply assembly is arranged in the gun body and is used to supply power to the motor and the control module.

[0012] Further, the gun body is provided with a pressure relief assembly.

[0013] Further, the pressure relief assembly comprises a gas leakage channel, a second valve core and a valve plug, the gas leakage channel is communicated with the gas outlet channel, the valve plug is fixed at the outlet end of the gas leakage channel, the second valve core passes through the valve plug and has a gap between the valve plug, the inner end of the second valve core is provided with a third sealing ring, under the driving of air pressure, the third sealing ring abuts against the valve plug to play a sealing role.

[0014] Compared with the prior art, the tire pressure gun can automatically inflate the inflatable article, making the use easy and convenient, and the control of the inflation pressure of the inflatable article is accurate; since the display module is further arranged in the driving control assembly, the user can know the internal air pressure of the inflatable object in real time during inflation, and the internal air pressure of the inflatable article can also be measured when not inflated; in addition, the gun body is further provided with a pressure relief assembly, when the internal air pressure of the inflatable article is too high, the inflation hose is connected with the air nozzle of the inflatable article, through the cooperation of the pressure relief assembly and the driving control assembly, the inflatable article can be accurately relieved, and the internal air pressure is appropriate. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a three-dimensional structure schematic diagram of the utility model;

[0016] Figure 2 It is a schematic diagram of the valve core assembly in a closed state;

[0017] Figure 3 It is a schematic diagram of the valve core assembly in an open state;

[0018] Figure 4 It is a cooperation schematic diagram of the cam and the first contact switch and the second contact switch;

[0019] Figure 5 It is a structure schematic diagram of the cam;

[0020] Figure 6 It is a connection schematic diagram of the driving control assembly. DETAILED DESCRIPTION

[0021] The utility model will be further described in detail in combination with the embodiment of the drawings.

[0022] As shown in the figure, an automatic inflatable tire pressure gun comprises a gun body 1, an air inlet channel 11, an air outlet channel 12 and an inflation hose 2, the air inlet channel 11 is used to be connected with a high-pressure air source, the inflation hose 2 is detachably fixed at the outlet end of the air outlet channel 12, for example, the inflation hose 2 is fixed by screwing with the air outlet channel 12, and the inflation hose 2 is used to be connected with the air nozzle of an inflatable article, a valve core assembly is arranged between the air inlet channel 11 and the air outlet channel 12, the valve core assembly comprises a first valve core 3 and a connecting channel (not marked in the figure) arranged in the gun body 1, the connecting channel communicates the air inlet channel 11 and the air outlet channel 12, the first valve core 3 is arranged in the connecting channel and has a gap with the connecting channel, the first valve core 3 is provided with a first sealing ring 31 and a second sealing ring 32, the first sealing ring 31 is used to prevent the gas in the connecting channel from leaking to the outside, the second sealing ring 32 is close to the air inlet channel 11, a valve core driving mechanism and a driving control assembly are arranged in the gun body 1, the valve core driving mechanism is used to automatically drive the valve core assembly to move, so as to realize the connection or disconnection between the air inlet channel and the air outlet channel, the valve core driving mechanism comprises a motor 4, a cam 5 and a spring 6, the motor 4 is fixed in the gun body 1, the cam 5 is fixed with the driving shaft of the motor 4, one end of the first valve core 3 protrudes out of the connecting channel and abuts against the outer peripheral surface of the cam 5, the other end of the first valve core 3 protrudes out of the connecting channel and enters the air inlet channel 11, the two ends of the spring 6 are respectively fixed with the air inlet channel 11 and the other end of the first valve core 3, when the cam 5 pushes the first valve core 3 to move towards the air inlet channel 11, the second sealing ring 32 on the first valve core 3 is separated from the connecting channel, the air inlet channel 11 is connected with the air outlet channel 12 through the connecting channel; when the spring 6 pushes the first valve core 3 to move away from the air inlet channel 11, the second sealing ring 32 enters the connecting channel, the connecting channel is in a sealed state, and the air inlet channel 11 is disconnected with the air outlet channel 12;

[0023] The driving control assembly is used to control the working of the valve core driving mechanism, the driving control assembly comprises a control module 7, a pressure setting module 8, a pressure sensor 9 and a power supply assembly 10, the gun body 1 is provided with a detection channel 13 communicated with the air outlet channel 12, the pressure sensor 9 is sealingly fixed on the detection channel 13 and is used to detect the gas pressure in the air outlet channel 12, the power supply assembly 10 is arranged in the gun body 1 and is used to supply power to the motor 4 and the control module 7, the pressure sensor 9, the pressure setting module 8 and the motor 4 are electrically connected with the control module 7.

[0024] In order to make the valve core drive mechanism to open and close control of the valve core assembly accurate to the place, still can be fixed in the gun body 1 with first contact switch 14 and second contact switch 15, the cam 5 is integrally provided with the contact lug 51 protruding along the axial direction, when the contact lug 51 is contacted with the first contact switch 14, the small diameter portion 52 of the cam 5 is abutted with the first valve core 3, so that the valve core assembly is in the closed state, when the contact lug 51 is contacted with the second contact switch 15, the large diameter portion 53 of the cam 5 is abutted with the first valve core 3, so that the valve core assembly is in the open state, the first contact switch 14 and the second contact switch 15 are electrically connected with the control module 7. Moreover, the position of the contact lug 51 on the cam 5 and the position of the first contact switch 14 and the second contact switch 15 in the gun body 1 are not unique, which can be changed according to actual needs.

[0025] In order to facilitate the user to know the air pressure of the inflatable article in real time when inflating, a display module 16 (such as a display screen) can be fixed on the gun body 1, and the display module 16 is electrically connected with the control module 7.

[0026] In addition, a pressure relief assembly can be provided on the gun body 1, which can relieve the pressure when the air pressure in the inflatable article is too high. The pressure relief assembly includes a gas discharge channel 17, a second valve core 18 and a valve plug 19. The gas discharge channel 17 is communicated with the gas outlet channel 12. The valve plug 19 is screwed and fixed at the outlet end of the gas discharge channel 17. The second valve core 18 passes through the valve plug 19 and has a gap between the valve plug 19. The inner end of the second valve core 18 is provided with a third sealing ring 20. Under the action of the air pressure in the gas outlet channel 12, the third sealing ring 20 abuts against the valve plug 19 to seal, and also prevents the second valve core 18 from coming out of the valve plug 19.

[0027] In addition, in the above embodiment, the pressure setting module 8 can be a plurality of keys, and the power supply assembly 10 can use dry batteries, lithium batteries or rechargeable batteries. The valve core drive mechanism can also be replaced by other existing drive mechanisms.

[0028] The automatic inflation process of the tire pressure gun is as follows: the air inlet channel 11 on the gun body 1 is connected with a high-pressure gas source, the inflatable hose 2 is connected with an inflatable article (such as a car tire, a ball, etc.), the pressure value required for inflation is set in advance by the pressure setting module 8, and then the control module 7 controls the motor 4 to drive the cam 5 to rotate. When the large diameter portion 53 of the cam 5 abuts against the first valve core 3, the first valve core 3 is pushed to move towards the air inlet channel 11, so that the second sealing ring 32 on the first valve core 3 is separated from the connecting channel, the air inlet channel 11 is communicated with the gas outlet channel 12 through the connecting channel, and the spring 6 is compressed. Figure 3As shown, the inflatable hose 2 inflates the article to be inflated; the cam 5 continues to rotate, when the contact lug 51 on the cam 5 contacts the second contact switch 15, the second contact switch 15 sends a signal to the control module 7, the control module 7 controls the motor 4 to stop working, and the cam 5 stops rotating. Figure 4 As shown, the second contact switch 15 feeds back a signal to the control module 7, the control module 7 controls the motor 4 to stop working, and the cam 5 stops rotating, since the motor 4 is a micro motor, the inertial rotation amount of the cam 5 can be ignored, and at this time the large diameter part 53 of the cam 5 still abuts against the first valve core 3, so that the valve core assembly remains in an open state, the inflatable hose 2 continuously inflates the article to be inflated, and the pressure sensor 9 detects the air pressure in the air outlet channel 12 in real time, the air pressure in the air outlet channel 12 is equal to the air pressure in the article to be inflated, when the pressure sensor 9 detects that the air pressure in the air outlet channel 12 reaches a set value, a signal is sent to the control module 7, the control module 7 controls the motor 4 to work, and drives the cam 5 to rotate forward or reversely, so that the small diameter part 52 of the cam 5 abuts against the first valve core 3, at the same time, when the spring 6 pushes the first valve core 3 to move away from the air inlet channel 11, the second sealing ring 32 enters the connecting channel, the connecting channel is in a sealed state, and the air inlet channel 11 and the air outlet channel 12 are disconnected, as shown. Figure 2 As shown, the cam 5 continues to rotate, when the contact lug 51 on the cam 5 contacts the first contact switch 14, the first contact switch 14 sends a signal to the control module 7, the control module 7 controls the motor 4 to stop working, and the cam 5 stops rotating, at this time, the small diameter part 52 of the cam 5 still abuts against the first valve core 3, so that the valve core assembly remains in a closed state, and the inflation is completed.

[0029] In addition, the drive control assembly of the utility model realizes the control of the motor through an existing control method, that is, the control circuit and the corresponding program setting between the motor 4, the pressure setting module 8, the pressure sensor 9, the first contact switch 14, the second contact switch 15, the display module 16 and the control module 7 adopt an existing mode, and the specific inflation mode can also be set differently according to different requirements.

[0030] The protection scope of the utility model includes but is not limited to the above implementation manners, the protection scope is subject to the claims, any replacement, deformation and improvement of the technology which is easily thought of by the person skilled in the art falls into the protection scope of the utility model.

Claims

1. An automatic inflator tire pressure gun comprising a gun body, an inlet passage for connecting to a source of high pressure gas, an outlet passage, and an inflation hose secured to the outlet end of the outlet passage, a valve core assembly disposed between the inlet passage and the outlet passage, characterized in that: The gun body is provided with a valve core driving mechanism and a driving control assembly, the valve core driving mechanism is used for automatically driving the valve core assembly to move, so as to realize the connection or disconnection between the air inlet channel and the air outlet channel, and the driving control assembly is used for controlling the working of the valve core driving mechanism.

2. An automatic inflator tire pressure gun as defined in claim 1 wherein: The valve core assembly comprises a first valve core and a connecting channel arranged in the gun body, the connecting channel is communicated with the air inlet channel and the air outlet channel, and the first valve core is arranged in the connecting channel and is in sealing sliding fit with the connecting channel.

3. An automatic inflator tire pressure gun as defined in claim 2 wherein: The first valve core is provided with a first sealing ring and a second sealing ring, there is a gap between the first valve core and the connecting channel, the first sealing ring is used for preventing the gas in the connecting channel from leaking to the outside, and the second sealing ring is close to the air inlet channel, when the valve core driving mechanism drives the first valve core to move towards the air inlet channel, the second sealing ring is separated from the connecting channel, and the air inlet channel is communicated with the air outlet channel through the connecting channel; when the valve core driving mechanism drives the first valve core to move away from the air inlet channel, the second sealing ring enters the connecting channel, and the air inlet channel is disconnected with the air outlet channel.

4. An automatic inflator tire pressure gun as defined in claim 2 wherein: The valve core driving mechanism comprises a motor, a cam and a spring, the motor is fixed in the gun body, the cam is fixed with the driving shaft of the motor, one end of the first valve core protrudes from the connecting channel and abuts against the outer peripheral surface of the cam, the other end of the first valve core protrudes from the connecting channel and enters the air inlet channel, and the two ends of the spring are fixed with the air inlet channel and the other end of the first valve core respectively.

5. An automatic inflator tire pressure gun as defined in claim 4 wherein: The gun body is fixedly provided with a first contact switch and a second contact switch, the cam is integrally provided with a contact protruding block protruding in the axial direction, when the contact protruding block contacts the first contact switch, the small-diameter part of the cam abuts against the first valve core, so that the valve core assembly is in a closed state, when the contact protruding block contacts the second contact switch, the large-diameter part of the cam abuts against the first valve core, so that the valve core assembly is in an open state, and the first contact switch and the second contact switch are electrically connected with the driving control assembly.

6. An automatic inflator tire pressure gun as defined in claim 4 wherein: The driving control assembly comprises a control module, a pressure setting module and a pressure sensor, the gun body is provided with a detection channel communicated with the air outlet channel, the pressure sensor is sealingly fixed on the detection channel and is used for detecting the gas pressure in the air outlet channel, and the pressure sensor, the pressure setting module and the motor are electrically connected with the control module.

7. An automatic inflator tire pressure gun as defined in claim 6 wherein: The driving control assembly further comprises a display module, the display module is fixed on the gun body and is electrically connected with the control module.

8. An automatic inflator tire pressure gun as defined in claim 6 wherein: The driving control assembly further comprises a power supply assembly arranged in the gun body and used for supplying power to the motor and the control module.

9. An automatic inflator tire pressure gun as defined in claim 1 wherein: The gun body is provided with a pressure relief assembly.

10. An automatic inflator tire pressure gun as defined in claim 9 wherein: The pressure relief assembly comprises a gas discharge channel, a second valve core and a valve plug. The gas discharge channel is communicated with the gas outlet channel. The valve plug is fixed at the outlet end of the gas discharge channel. The second valve core passes through the valve plug and has a gap with the valve plug. The inner end of the second valve core is provided with a third sealing ring. Under the action of air pressure, the third sealing ring abuts against the valve plug to play a sealing role.

Images