CN213315683U

CN213315683U - Brushless spray gun

Info

Publication number: CN213315683U
Application number: CN202021831465.9U
Authority: CN
Inventors: 施将健; 周豪威
Original assignee: Fenghua Weilder Electric Appliance Co Ltd
Current assignee: Fenghua Weilder Electric Appliance Co Ltd
Priority date: 2020-08-28
Filing date: 2020-08-28
Publication date: 2021-06-01
Anticipated expiration: 2030-08-28

Abstract

The utility model discloses a brushless spray gun, including the rifle body, the storage vat, casing and fan, the front end of the rifle body is provided with the nozzle respectively and covers the atomizing hood of locating the nozzle outside, the internal needle post installation cavity that is provided with of rifle, be provided with the straw with needle post installation cavity intercommunication in the storage vat, needle post installation cavity activity be provided with nozzle complex needle post subassembly, be provided with air collecting duct subassembly in the casing, be formed with the wind channel that gathers in the air collecting duct subassembly, the casing extends there is the grip handle, the fan includes brushless motor and impeller, brushless motor includes the drive controller of motor main part and control motor main part function, motor main part and impeller set up in the wind channel that gathers, impeller mounting is on the motor shaft of motor main part, drive controller sets up in the grip handle. The utility model has the advantages of simple and reasonable structure, the installation is compact, and atomization effect is better, and life is longer.

Description

Brushless spray gun

Technical Field

The utility model relates to an electric spray gun technical field, in particular to brushless spray gun.

Background

The spray gun is a spraying device which atomizes liquid and further sprays objects to be coated to obtain uniform and attractive coating layers. Electric spray gun generally by the rifle body, the nozzle, the atomizing hood, the storage bucket, the wind-collecting cylinder, cooperation such as fan and power supply module is constituteed, spray gun atomization work is mainly passed through the wind-collecting cylinder directly with the help of the wind pressure that the fan produced and is transmitted to the rifle body, make the internal two way wind pressures that form of rifle, the wind pressure of the same way acts on the storage bucket through the internal space of rifle, make the coating in the storage bucket pass through the straw under the wind pressure effect and press to the rifle body, and discharge through the nozzle, another way wind pressure is finally followed the clearance discharge between atomizing hood and the nozzle through the internal space of rifle, thereby atomize from nozzle spun liquid coating. For the specific structure and principle of the existing spray gun, refer to a dc spray gun as disclosed in chinese patent (application No. 201720715533.7).

The fan of current electric spray gun all adopts to have the brush motor as the power supply, and it is lower to have the wind pressure during the use, the not good problem of atomization effect, in addition, because there is the brush motor volume great, consequently need occupy great installation space, has brush motor life also shorter moreover.

Therefore, there is a need for an improved structure of the conventional electric spray gun.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to prior art's defect with not enough, provide a brushless spray gun, its simple structure is reasonable, installs compactly, and atomization effect is better, and life is longer.

In order to achieve the above purpose, the utility model adopts the following technical scheme.

A brushless spray gun comprises a gun body, a storage barrel, a machine shell and a fan, wherein the storage barrel and the machine shell are respectively connected with the gun body, the front end of the gun body is respectively provided with a nozzle and an atomizing blast cap covering the outside of the nozzle, a needle column installation cavity is arranged in the gun body, a suction pipe communicated with the needle column mounting cavity is arranged in the storage barrel, a needle column assembly matched with the nozzle is movably arranged in the needle column mounting cavity, a trigger for controlling the needle cylinder component to act is arranged on the gun body, a wind collecting barrel component is arranged in the machine shell, the air collecting cylinder component is connected with the rear end of the gun body and is provided with an air collecting channel communicated with the gun body, the shell is extended with a holding handle, and the holding handle is provided with a power supply and a trigger switch for controlling the power on and off of the power supply;

the fan includes brushless motor and impeller, brushless motor includes motor main part and control the drive controller of motor main part function, motor main part with the impeller set up in the wind channel of collection, the impeller install in on the motor shaft of motor main part, drive controller set up in the grip handle, power supply motor main part trigger switch respectively with the drive controller electricity is connected.

Furthermore, the air collecting barrel assembly comprises an air collecting barrel and an air collecting barrel rear cover matched with the air collecting barrel, and the gun body, the air collecting barrel and the air collecting barrel rear cover are sequentially connected from front to back; the air collecting barrel is matched with the air collecting barrel rear cover to form the air collecting channel, the air penetrating grid plate is arranged inside the air collecting barrel, and the motor main body is abutted between the air penetrating grid plate and the air collecting barrel rear cover.

Furthermore, a motor positioning column is arranged between the front end of the motor main body and the ventilation grid plate in a propping manner, and the motor positioning column is respectively matched with the motor main body and the ventilation grid plate in a positioning manner.

Further, a fan shell covering the outside of the impeller is arranged at the rear end of the motor main body, a sealing sleeve is sleeved outside the fan shell, the outer wall of the sealing sleeve is in sealing fit with the inner wall of the rear cover of the air collecting cylinder, and the rear end of the sealing sleeve is axially abutted to the air collecting cylinder.

Further, the lateral wall of the grip handle is provided with heat dissipation holes, an air convection channel flowing through the drive controller is formed inside the grip handle, one end of the air convection channel is communicated with the heat dissipation holes, and the other end of the air convection channel is connected to an air inlet end of the air collection channel.

Further, the casing is provided with a speed regulation knob, and the speed regulation knob is electrically connected with the driving controller.

Further, the needle post subassembly includes needle post and needle post spring, the needle post with the nozzle corresponds the cooperation, the needle post spring support locate the needle post with between the rifle body, the needle post spring is used for making the needle post has the shutoff all the time the motion trend of nozzle, the trigger with the needle post linkage cooperation, the rifle body is formed with the infusion pipeline, the one end of infusion pipeline with the straw is connected, the other end with the needle post installation cavity intercommunication.

Furthermore, the rear end of the gun body is provided with a one-way valve used for limiting the fluid medium to flow to the gun body only from the air collecting channel, and the input end of the one-way valve is communicated with the air outlet end of the air collecting channel.

Furthermore, the rear end of the casing is provided with a casing rear cover with an air inlet, and dustproof cotton is arranged between the air inlet and the air inlet end of the air collecting channel.

Further, the power supply is a lithium battery detachably mounted at the bottom of the holding handle.

The utility model provides a brushless spray gun compares with current electric spray gun, and the beneficial effect who possesses does:

(1) the utility model adopts the brushless motor to replace the brush motor as the power source of the fan, the wind pressure generated during the work is higher, which is more favorable for improving the atomization effect; the brushless motor is smaller in size, and the installation space is saved during installation; the brushless motor has longer service life, more stable and reliable working performance and more convenient control;

(2) because the brushless motor needs to be provided with the driving controller to control the working state (such as electronic reversing and the like) of the motor main body, the existing brushless motor usually integrates the motor main body and the driving controller, while the utility model adopts the distributed layout mode of the motor main body and the driving controller, in particular to install the motor main body in the wind collecting channel, and the driving controller is separately arranged in the holding handle, by adopting the structure, when the fan is started, the shielding of the driving controller on the wind pressure flowing to the gun body can be reduced, the wind power is improved, and simultaneously, the wind pressure flowing to the wind collecting channel from the air inlet at the rear end of the shell generated by the rotation of the impeller can not flow through the driving controller and then enter the gun body, thereby avoiding the phenomenon that the liquid coating volatilizes and blocks the nozzle (the driving controller is integrated with various electronic components, the during operation temperature is higher, and the spray gun is at the during operation, the overwhelming majority of air that gets into the spray gun is from the air inlet department that is located the casing rear end, if this part wind pressure flows through drive controller, just can take away drive controller's heat through the form of convection current, receive spray gun casing size's restriction in addition, the length of collection wind passageway is limited, make the gas temperature that flows to the rifle body higher, high-temperature gas can make liquid coating volatilize, and leave over and just can cause the nozzle to block up in the air-dried coating of nozzle department), and then further ensured atomization effect, the product quality has been promoted.

Drawings

Fig. 1 is a schematic overall sectional structure of the present invention.

Fig. 2 is a schematic view of the overall three-dimensional structure of the present invention.

Fig. 3 is an exploded view of the motor body, the impeller and the wind collecting barrel assembly of the present invention.

Fig. 4 is a cross-sectional view of the motor main body, the impeller and the wind collecting barrel assembly of the utility model.

In FIGS. 1-4: 1. a gun body; 11. a needle post mounting cavity; 12. a transfusion pipeline; 13. a one-way valve; 2. a storage barrel; 21. a straw; 3. a housing; 31. a trigger switch; 32. a grip handle; 321. heat dissipation holes; 33. a speed regulation knob; 34. a rear cover of the housing; 35. dustproof cotton; 4. a nozzle; 5. an atomizing hood; 51. an atomizing channel; 6. a trigger; 71. a needle cylinder; 72. a needle cylinder spring; 81. an air collecting cylinder; 811. a ventilation grid plate; 82. a rear cover of the wind collecting barrel; 83. a wind collecting channel; 91. a motor main body; 911. a fan housing; 92. a drive controller; 93. an impeller; 94. sealing sleeves; 10. a motor positioning column; A. an air convection channel.

Detailed Description

The present invention will be further described with reference to the accompanying drawings.

As shown in fig. 1-4, a brushless spray gun includes a gun body 1, a storage tank 2, a housing 3 and a blower, wherein the storage tank 2 and the housing 3 are respectively connected to the gun body 1, in this embodiment, the storage tank 2 is connected to the bottom of the gun body 1, and the housing 3 is connected to the rear end of the gun body 1. The front end of the gun body 1 is respectively provided with a nozzle 4 and an atomizing hood 5 covering the outside of the nozzle 4, a gap for gas to flow out is arranged between the atomizing hood 5 and the nozzle 4, and an atomizing channel 51 is formed on the atomizing hood 5 and used for high-pressure gas flowing into the gun body 1 to flow out, so that the coating at the nozzle 4 is atomized.

Be provided with needle post installation cavity 11 in the rifle body 1, be provided with the straw 21 with needle post installation cavity 11 intercommunication in the storage vat 2, needle post installation cavity 11 internalization be provided with nozzle 4 complex needle post subassembly, be provided with the trigger 6 that is used for controlling the action of needle post subassembly on the rifle body 1.

The needle column assembly comprises a needle column 71 and a needle column spring 72, the needle column 71 is correspondingly matched with the nozzle 4, the needle column spring 72 is abutted between the needle column 71 and the gun body 1, the needle column spring 72 is used for enabling the needle column 71 to have the movement trend of blocking the nozzle 4 all the time, the trigger 6 is in linkage fit with the needle column 71, the gun body 1 is formed with an infusion pipeline 12, one end of the infusion pipeline 12 is connected with the suction pipe 21, and the other end of the infusion pipeline is communicated with the needle column installation cavity 11.

Two wind channels are formed in the gun body 1, one wind channel is communicated with the atomizing channel 51, the other wind channel is communicated with the storage barrel 2, after high-pressure gas enters the gun body 1, the gas flowing into the storage barrel 2 presses liquid coating in the storage barrel 2 to the needle post installation cavity 11 from the suction pipe 21 under the action of air pressure, the gas flows out of the gun body 1 from the nozzle 4, the gas which does not flow into the storage barrel 2 is discharged out of the gun body 1 through the atomizing channel 51, the liquid coating at the position of the nozzle 4 is atomized, and the atomizing and spraying effects are achieved.

Be provided with wind-collecting barrel subassembly in the casing 3, wind-collecting barrel subassembly is connected in the rear end of rifle body 1, wind-collecting barrel subassembly is formed with the wind-collecting channel 83 with rifle body 1 intercommunication, casing 3 extends has grip handle 32, grip handle 32 is provided with power supply and is used for controlling the trigger switch 31 of power supply outage, in this embodiment, power supply is detachably installed in the lithium cell (not shown in the figure) of grip handle 32 bottom, trigger switch 31 and trigger 6 linkage cooperation, when pulling trigger 6, trigger 6 rotates and triggers trigger switch 31 relative rifle body 1.

The fan includes brushless motor and impeller 93, and brushless motor includes motor main part 91 and the drive controller 92 of control motor main part 91 function, and motor main part 91 and impeller 93 set up in wind channel 83, and impeller 93 installs on the motor shaft of motor main part 91, and impeller 93 is located the rear end of motor main part 91, and drive controller 92 sets up in gripping handle 32, and power supply, motor main part 91, trigger switch 31 are connected with drive controller 92 electricity respectively.

The above constitutes the main structure of the utility model.

The utility model adopts the brushless motor to replace the brush motor as the power source of the fan, the wind pressure generated during the work is higher, which is more favorable for improving the atomization effect; the brushless motor is smaller in size, and the installation space is saved during installation; the brushless motor has longer service life, more stable and reliable working performance and more convenient control.

Because the brushless motor needs to be provided with the driving controller 92 to control the working state (such as electronic commutation, etc.) of the motor main body 91, the existing brushless motor usually integrates the motor main body 91 with the driving controller 92, while the present invention adopts the distributed layout of the motor main body 91 and the driving controller 92, specifically, the motor main body 91 is installed in the wind collecting channel 83, and the driving controller 92 is separately arranged in the holding handle 32, in other words, the space region formed by the matching of the wind collecting barrel assembly and the gun body of the present invention is not provided with the heating electronic component for driving the motor main body 91 to work, and the above structure arrangement is adopted, when the fan is started, the shielding of the driving controller 92 to the wind pressure flowing to the gun body can be reduced, the wind power is improved, and simultaneously, the wind pressure generated by the rotation of the impeller 93 and flowing to the wind collecting channel from the air inlet at the rear end of the machine shell 3, the liquid coating can be prevented from volatilizing and blocking the nozzle 4 (the driving controller 92 is integrated with various electronic components, the temperature is higher during operation, the spray gun operates, most of the air entering the spray gun is from the air inlet positioned at the rear end of the shell 3, if the air pressure flows through the driving controller, the heat of the driving controller can be taken away through the convection mode, the air is limited by the size of the shell of the spray gun, the length of the air collecting channel is limited, the air temperature flowing into the gun body is higher, the high-temperature air can volatilize the liquid coating, the air-dried coating at the nozzle can be blocked, the atomization effect is further ensured, and the product quality is improved.

In this embodiment, the air collecting duct assembly includes an air collecting duct 81 and an air collecting duct rear cover 82 adapted thereto, and the gun body 1, the air collecting duct 81 and the air collecting duct rear cover 82 are sequentially connected from front to back. The air collecting barrel 81 and the air collecting barrel rear cover 82 are matched to form an air collecting channel 83, an air penetrating grid plate 811 is arranged inside the air collecting barrel 81, and the motor main body 91 is abutted between the air penetrating grid plate 811 and the air collecting barrel rear cover 82.

Specifically, a motor positioning column 10 is abutted between the front end of the motor main body 91 and the ventilation grid plate 811, the motor positioning column 10 is respectively in positioning fit with the motor main body 91 and the ventilation grid plate 811, in this embodiment, positioning bosses are respectively arranged at the front end and the rear end of the motor positioning column 10, and positioning grooves matched with the corresponding positioning bosses are respectively arranged on the motor main body 91 and the ventilation grid plate 811.

In this embodiment, the rear end of the motor main body 91 is provided with a fan housing 911 covering the outside of the impeller 93, the outside of the fan housing 911 is sleeved with a sealing sleeve 94, the outer wall of the sealing sleeve 94 is in sealing fit with the inner wall of the air collecting cylinder rear cover 82, and the rear end of the sealing sleeve 94 is axially abutted to the air collecting cylinder 81.

Through above mounting structure for motor main part 91 and impeller 93 are spacing behind ventilation grid 811 and collection wind section of thick bamboo between lid 82 axially, simultaneously, utilize the sealed cooperation between lid 82 behind seal cover 94 and the collection wind section of thick bamboo, both make motor main part 91 and impeller 93 spacing at the circumferencial direction, ensure that during operation motor main part 91/impeller 93 can not appear along axial/radial rocking, and also ensured that near the air of impeller 93 can only flow to collection wind passageway 83 from impeller 93, the wind collection effect is better, further promoted the wind pressure.

In this embodiment, the heat dissipation hole 321 is disposed on the sidewall of the handle 32, the air convection channel a passing through the driving controller 92 is formed inside the handle 32, one end of the air convection channel a is communicated with the heat dissipation hole 321, the other end of the air convection channel a is connected to the air intake end of the air collection channel 83, and by the above structure, when the blower is started, under the action of negative pressure, most of the air near the casing 3 will flow into the air collecting channel from the air inlet at the rear end of the casing 3 (i.e. the air inlet provided on the casing rear cover 34), but at the same time, some air (a small amount) will be sucked into the air convection channel a from the heat dissipation holes 321 and flow into the air inlet end of the air collection channel 83 along the air convection channel a, in the flowing process of the small amount of air, the heat of the driving controller 92 can be taken away, and the effect of dissipating the heat of the driving controller 92 is achieved. It should be noted that, on one hand, the air can enter the air collecting channel after moving for a certain distance and time in the air convection channel a, and on the other hand, the air flow entering the air convection channel a through the heat dissipation holes 321 is relatively small (much smaller than the air flow flowing in from the air inlet at the rear end of the casing 3), so that in the above working process, although the air in the air convection channel a carries some heat, that is, hot air is formed, the temperature of the hot air is reduced when the hot air enters the air collecting channel, and especially after being merged with a large amount of cold air flowing in from the rear end of the casing, the hot air can be basically neutralized by the cold air, so that no obvious temperature rising effect is generated on the air pressure entering the gun body.

In this embodiment, the casing 3 is provided with a speed regulation knob 33, the speed regulation knob 33 is electrically connected to the driving controller 92, and the speed regulation knob 33 is used for speed regulation control of the motor main body 91, so as to change the wind pressure.

In this embodiment, the rear end of the gun body 1 is provided with a check valve 13 for limiting the fluid medium to flow to the gun body 1 only from the air collecting channel 83, the input end of the check valve 13 is communicated with the air outlet end of the air collecting channel 83, and specifically, the check valve 13 is arranged at the air inlet end of the gun body 1. When the fan shut down, check valve 13 self-closing has prevented remaining gas's refluence in the storage vat 2, and remaining gas can in time be discharged from atomizing channel 51 in the rifle body 1 for when the start next time, liquid material can normally atomize, and the water spray column phenomenon can not appear.

In this embodiment, the rear end of the housing 3 is provided with the housing rear cover 34 having the air inlet, the dustproof cotton 35 is arranged between the air inlet and the air inlet end of the air collecting channel 83, and the dustproof cotton 35 can effectively filter particles such as dust in the air, so as to prevent the particles from entering the air collecting channel 83, thereby playing the role of protecting all parts of the housing.

The above is only the preferred embodiment of the present invention, so all the equivalent changes or modifications made by the structure, features and principles in accordance with the claims of the present invention are included in the claims of the present invention.

Claims

1. A brushless spray gun comprises a gun body, a storage barrel, a casing and a fan, wherein the storage barrel and the casing are respectively connected with the gun body, the front end of the gun body is respectively provided with a nozzle and an atomization hood covering the outside of the nozzle, a needle column installation cavity is arranged in the gun body, a suction pipe communicated with the needle column installation cavity is arranged in the storage barrel, a needle column assembly matched with the nozzle is movably arranged in the needle column installation cavity, a trigger for controlling the needle column assembly to act is arranged on the gun body, an air collection barrel assembly is arranged in the casing and is connected with the rear end of the gun body, an air collection channel communicated with the gun body is formed in the air collection barrel assembly, a holding handle extends from the casing, and the holding handle is provided with a power supply and a trigger switch for controlling the power supply to be switched on or switched off, the method is characterized in that:

2. The brushless spray gun of claim 1, wherein: the air collecting barrel assembly comprises an air collecting barrel and an air collecting barrel rear cover matched with the air collecting barrel, and the gun body, the air collecting barrel and the air collecting barrel rear cover are sequentially connected from front to back; the air collecting barrel is matched with the air collecting barrel rear cover to form the air collecting channel, the air penetrating grid plate is arranged inside the air collecting barrel, and the motor main body is abutted between the air penetrating grid plate and the air collecting barrel rear cover.

3. The brushless spray gun of claim 2, wherein: a motor positioning column is arranged between the front end of the motor main body and the ventilation grid plate in a propping mode, and the motor positioning column is respectively matched with the motor main body and the ventilation grid plate in a positioning mode.

4. The brushless spray gun of claim 2 or 3, wherein: the rear end of the motor main body is provided with a fan shell covering the outside of the impeller, a sealing sleeve is sleeved outside the fan shell, the outer wall of the sealing sleeve is in sealing fit with the inner wall of the rear cover of the wind collecting barrel, and the rear end of the sealing sleeve is axially abutted to the wind collecting barrel.

5. The brushless spray gun of claim 1, wherein: the lateral wall of grip handle is provided with the louvre, the inside of grip handle is formed with and flows through the air convection passageway of drive controller, the one end of air convection passageway with the louvre intercommunication, the other end of air convection passageway is connected to the air inlet end of collection wind passageway.

6. The brushless spray gun of claim 1, wherein: the casing is provided with a speed regulation knob, and the speed regulation knob is electrically connected with the driving controller.

7. The brushless spray gun of claim 1, wherein: the needle cylinder subassembly includes needle cylinder and needle cylinder spring, the needle cylinder with the nozzle corresponds the cooperation, the needle cylinder spring support locate the needle cylinder with between the rifle body, the needle cylinder spring is used for making the needle cylinder has the shutoff all the time the motion trend of nozzle, the trigger with the needle cylinder linkage cooperation, the rifle body is formed with the infusion pipeline, the one end of infusion pipeline with the straw is connected, the other end with the needle cylinder installation cavity intercommunication.

8. The brushless spray gun of claim 1, wherein: the rear end of the gun body is provided with a one-way valve used for limiting fluid media to flow to the gun body only from the air collecting channel, and the input end of the one-way valve is communicated with the air outlet end of the air collecting channel.

9. The brushless spray gun of claim 1, wherein: the rear end of the casing is provided with a casing rear cover with an air inlet, and dustproof cotton is arranged between the air inlet and the air inlet end of the air collecting channel.

10. The brushless spray gun of claim 1, wherein: the power supply is a lithium battery which is detachably arranged at the bottom of the holding handle.