CN217747563U

CN217747563U - Hand-held high-pressure airless spray gun

Info

Publication number: CN217747563U
Application number: CN202221537479.9U
Authority: CN
Inventors: 周肃虎; 金建跃; 胡建林
Original assignee: Jinhua Jinshun Tools Co Ltd
Current assignee: Jinhua Jinshun Tools Co Ltd
Priority date: 2022-06-17
Filing date: 2022-06-17
Publication date: 2022-11-08
Anticipated expiration: 2032-06-17

Abstract

A hand-held high-pressure airless spray gun includes a housing and a plunger pump assembly. The casing is equipped with the plunger chamber, and the plunger pump subassembly is located in the casing, including motor, reduction gears, eccentric wheel, plunger rod, first and second piston sleeve. The side surface of the rod body of the plunger rod is provided with an eccentric wheel acting part, and the eccentric wheel acts on the eccentric wheel acting part to drive the plunger rod to move in the plunger cavity in a reciprocating manner. The first plunger sleeve and the second plunger sleeve are sleeved outside the plunger rod and are respectively positioned on two sides of the action part of the eccentric wheel, a first working cavity is formed between the first plunger sleeve and one end of the plunger cavity, and a second working cavity is formed between the second plunger sleeve and the other end of the plunger cavity. The shell is provided with a first liquid inlet port, a second liquid inlet port, a first liquid outlet port and a second liquid outlet port, the first liquid inlet port and the first liquid outlet port are respectively communicated with the first working cavity, and the second liquid inlet port and the second liquid outlet port are respectively communicated with the second working cavity. The utility model discloses compact structure, whole small, the spraying is efficient, easily carries and maintains.

Description

Hand-held high-pressure airless spray gun

Technical Field

The utility model relates to an electric tool technical field especially relates to spraying equipment.

Background

The high-pressure airless spray gun increases the coating to high pressure by adopting a plunger pump assembly, and the coating is sprayed out through a fine spray hole on the spray gun to form fan-shaped fog, so that the atomizing spray effect is achieved. The existing hand-held high-pressure airless spray gun mainly has the following problems; 1. the plunger pump assembly comprises a motor, a speed reducing mechanism, an eccentric wheel, a connecting rod, a plunger rod and the like, wherein an output shaft of the motor is arranged in parallel with the plunger rod, so that the high-pressure airless spray gun is large in length and size, is not convenient to carry, and increases the labor intensity of a user during use; 2. the conventional airless spray gun operates in such a manner that in each reciprocating motion period (i.e., a cycle period) of the plunger rod, the first half period is filled with liquid but not sprayed, and the second half period is sprayed but not filled with liquid, and the cycle is repeated. Because the spraying operation is not carried out in a half period of each cycle period, the spraying pressure and the flow are unbalanced, and the spraying efficiency is not high; 3. plunger bushing and plunger bushing sealing washer all set up inside the casing, cause inconvenience for installation and maintenance.

Disclosure of Invention

The utility model aims to solve the technical problem that a hand-held type high pressure airless spray gun that compact structure, whole small, spraying are efficient, easily carry and maintain is provided.

The embodiment of the utility model provides a hand-held type high pressure airless spray gun, including casing and plunger pump subassembly; the shell is provided with a plunger cavity, a liquid inlet channel and a liquid outlet channel; the plunger pump assembly is arranged in the shell and comprises a motor, a speed reducing mechanism, an eccentric wheel and a plunger rod, and the motor drives the eccentric wheel to rotate through the speed reducing mechanism; the plunger rod is characterized in that an eccentric wheel acting part is arranged on the side face of a rod body of the plunger rod, and the eccentric wheel acts on the eccentric wheel acting part to drive the plunger rod to reciprocate in a plunger cavity; the plunger pump assembly comprises a first plunger sleeve and a second plunger sleeve, the first plunger sleeve and the second plunger sleeve are fixedly arranged on the shell and sleeved outside the plunger rod, the first plunger sleeve and the second plunger sleeve are respectively positioned on two sides of the action part of the eccentric wheel, a first working cavity is formed between the first plunger sleeve and one end of the plunger cavity, and a second working cavity is formed between the second plunger sleeve and the other end of the plunger cavity; the shell is provided with a first liquid inlet interface, a second liquid inlet interface, a first liquid outlet interface and a second liquid outlet interface, the first liquid inlet interface and the second liquid inlet interface are respectively communicated with a liquid inlet channel, and the first liquid outlet interface and the second liquid outlet interface are respectively communicated with a liquid outlet channel; the first liquid inlet port and the first liquid outlet port are respectively communicated with the first working cavity, the second liquid inlet port and the second liquid outlet port are respectively communicated with the second working cavity, and the first liquid inlet port, the second liquid inlet port, the first liquid outlet port and the second liquid outlet port are respectively provided with a first liquid inlet one-way valve, a second liquid inlet one-way valve, a first liquid outlet one-way valve and a second liquid outlet one-way valve.

In the handheld high-pressure airless spray gun, the axial direction of the motor is consistent with the length direction of the handheld high-pressure airless spray gun, and the axial direction of the plunger rod is consistent with the width direction of the handheld high-pressure airless spray gun.

Foretell hand-held type high pressure airless spray gun, wherein, plunger pump subassembly includes first plunger bushing sealing washer and second plunger bushing sealing washer, outside first plunger bushing was located to first plunger bushing sealing washer cover, outside second plunger bushing is located to second plunger bushing sealing washer cover.

The handheld high-pressure airless spray gun comprises a shell, a first working chamber seat, a second working chamber seat, a first spray gun body, a second spray gun body and a handheld high-pressure airless spray gun, wherein the shell comprises a shell main body; the first plunger sleeve and the first plunger sleeve sealing ring are located in the first working cavity seat, and the second plunger sleeve sealing ring are located in the second working cavity seat.

The utility model discloses at least, have following advantage:

1. the handheld high-pressure airless spray gun is provided with the single plunger rod and the two working chambers, and liquid inlet and liquid outlet can be synchronously performed through unidirectional movement of the plunger rod, so that liquid can be continuously discharged and sprayed in a full period, and the spraying efficiency is improved;

2. the plunger pump assembly of the embodiment is not provided with the connecting rod, the plunger rod is directly driven to reciprocate by the eccentric wheel, the axial direction of the motor is vertical to the axial direction of the plunger rod, and compared with the prior art, the length size of the whole machine can be reduced, the whole structure is more compact, and the carrying, the operation and the use are more convenient;

3. the plunger sleeve sealing ring of this embodiment sets up in detachable working chamber seat, and the later stage of being convenient for is changed and is maintained.

Drawings

Fig. 1 shows an external view of a handheld high-pressure airless spray gun according to an embodiment of the present invention.

Fig. 2 shows a schematic partial cross-sectional view of a handheld high-pressure airless spray gun according to an embodiment of the present invention.

Fig. 3 and 4 show schematic cross-sectional views of a handheld high-pressure airless spray gun according to an embodiment of the present invention from different angles, respectively.

Fig. 5 and 6 show a perspective view and an exploded view of a plunger pump assembly of a handheld high-pressure airless spray gun according to an embodiment of the present invention, respectively.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

Please refer to fig. 1 to 6. According to the utility model discloses a hand-held type high pressure airless spray gun of embodiment includes casing 1, stock solution container 2, nozzle 3, battery package 4 and plunger pump subassembly.

The machine shell 1 is provided with a plunger cavity 10, a liquid inlet channel 11 and a liquid outlet channel 12.

The liquid storage container 2, the nozzle 3 and the battery pack 4 are detachably connected with the casing 1 respectively. The liquid inlet channel 11 is communicated with the liquid storage container 2, and the liquid outlet channel 12 is communicated with the nozzle 3. In this embodiment, the liquid inlet channel 11 is communicated with the liquid storage container 2 through a suction pipe 21 extending into the liquid storage container 2. The outlet channel 12 communicates with the nozzle 3 via the outlet valve 8. The battery pack 4 is a lithium battery pack.

A plunger pump assembly is provided in the housing 1, the plunger pump assembly comprising a motor 51, a speed reducing mechanism, an eccentric wheel 53, a plunger rod 54, a first plunger sleeve 55, a second plunger sleeve 56, a first plunger sleeve seal 57 and a second plunger sleeve seal 58.

The motor 51 drives the eccentric wheel 53 to rotate through a speed reducing mechanism. In the present embodiment, the reduction mechanism is a two-stage gear reduction mechanism including a transmission shaft 521, an eccentric shaft 522, a motor output gear 523, a first transmission shaft gear 524, a second transmission shaft gear 525, and an eccentric shaft gear 526.

The transmission shaft 521 and the eccentric shaft 522 are rotatably provided to the casing 1, respectively. A first support bearing 5271 and a second support bearing 5272 are respectively sleeved at two ends of the transmission shaft 521, and a third support bearing 5273 and a fourth support bearing 5274 are respectively sleeved at two ends of the eccentric shaft 522. The motor output gear 523 is connected to an output shaft of the motor 51, and the first transmission shaft gear 524 and the second transmission shaft gear 525 are respectively connected to the transmission shaft 521 and rotate synchronously with the transmission shaft 521. The eccentric shaft gear 526 is connected to the eccentric shaft 522 and drives the eccentric shaft 522 to rotate synchronously. The motor output gear 523 is meshed with the first transmission shaft gear 524, and the number of teeth of the motor output gear 523 is less than that of the first transmission shaft gear 524; the second driving shaft gear 525 is engaged with the eccentric shaft gear 526, and the number of teeth of the second driving shaft gear 525 is smaller than that of the eccentric shaft gear 526.

The eccentric shaft 522 includes a main shaft 5221 and an eccentric portion 5222, and the eccentric portion 5222 is integrally connected to one end of the main shaft 5221; the eccentric shaft gear 526 is sleeved on the main shaft 5221, and the eccentric wheel 53 is sleeved on the eccentric portion 5222. In the present embodiment, the eccentric wheel 53 is constituted by a bearing.

The side surface of the rod body of the plunger rod 54 is provided with an eccentric wheel acting part 543, and the eccentric wheel 53 acts on the eccentric wheel acting part 543 to drive the plunger rod 54 to reciprocate in the plunger cavity 10. In this embodiment, the eccentric wheel action portion 543 is a groove disposed on the side of the plunger rod, and the eccentric wheel 53 extends into the groove 543 and abuts against the end walls of the two ends of the groove 543 respectively.

The first plunger sleeve 55 and the second plunger sleeve 56 are fixedly arranged on the machine shell 1 and sleeved outside the plunger rod 53, the first plunger sleeve 55 and the second plunger sleeve 56 are respectively positioned on two sides of the eccentric wheel action part 543, a first working cavity 101 is formed between the first plunger sleeve 55 and one end of the plunger cavity 10, and a second working cavity 102 is formed between the second plunger sleeve 56 and the other end of the plunger cavity 10; the first plunger sleeve sealing ring 57 is sleeved outside the first plunger sleeve 55, and the second plunger sleeve sealing ring 58 is sleeved outside the second plunger sleeve 56.

In this embodiment, the axial direction of the motor 51 is the same as the length direction of the handheld high-pressure airless spray gun, and the axial direction of the plunger rod 54 is the same as the width direction of the handheld high-pressure airless spray gun, so that the length dimension of the product is reduced, and the overall structure of the product is more compact. The casing 1 includes a casing main body 1A, a first working chamber seat 1B and a second working chamber seat 1C, and the first working chamber seat 1B and the second working chamber seat 1C are detachably connected to the casing main body 1A by screws 71, respectively. A first plunger sleeve 55 and a first plunger sleeve seal 57 are located in the first working chamber housing 1B and a second plunger sleeve 56 and a second plunger sleeve seal 58 are located in the second working chamber housing 1C. The plunger sleeve sealing ring is arranged in the detachable working cavity seat, so that convenience is brought to later-stage replacement and maintenance.

The machine shell 1 is provided with a first liquid inlet interface 13, a second liquid inlet interface 14, a first liquid outlet interface 15 and a second liquid outlet interface 16, the first liquid inlet interface 13 and the second liquid inlet interface 14 are located below the piston rod cavity 10, and the first liquid outlet interface 15 and the second liquid outlet interface 16 are located above the piston rod cavity 10. The first liquid inlet interface 13 and the second liquid inlet interface 14 are respectively communicated with the liquid inlet channel 11, and the first liquid outlet interface 15 and the second liquid outlet interface 16 are respectively communicated with the liquid outlet channel 12. The first liquid inlet port 13 and the first liquid outlet port 14 are respectively communicated with the first working cavity 101, the second liquid inlet port 15 and the second liquid outlet port 16 are respectively communicated with the second working cavity 102, and the first liquid inlet port 13, the second liquid inlet port 14, the first liquid outlet port 15 and the second liquid outlet port 16 are respectively provided with a first liquid inlet one-way valve 61, a second liquid inlet one-way valve 62, a first liquid outlet one-way valve 63 and a second liquid outlet one-way valve 64.

Each liquid inlet check valve comprises a liquid inlet valve seat 611 and a liquid inlet valve ball 612, and each liquid outlet check valve comprises a liquid outlet valve seat 621, a liquid outlet valve ball 622 and a liquid outlet valve spring 623.

The working process of the handheld high-pressure airless spray gun according to the embodiment of the present invention is described as follows.

After the power is supplied, the motor 51 drives the eccentric wheel 53 to rotate through the speed reducing mechanism, the eccentric wheel 53 converts the rotating motion into the reciprocating linear motion of the plunger rod 54, so that the volumes of the first working chamber 101 and the second working chamber 102 are changed, and the cycle process of material suction and material pressing is realized.

When the plunger rod 54 moves to the side of the second working chamber 102, as shown in fig. 4, the volume of the first working chamber 101 increases to form negative pressure, and the volume of the second working chamber 102 decreases to form positive pressure. The liquid in the liquid storage container 2 pushes open the liquid inlet valve ball 612 of the first liquid inlet check valve 61 under the action of atmospheric pressure, so that the first liquid inlet check valve 61 is opened, the liquid outlet valve ball 622 of the first liquid outlet check valve 63 closes the liquid outlet valve seat 621 under the combined action of the elastic force and the negative pressure of the liquid outlet valve spring 623, so that the first liquid outlet check valve 63 is closed, and the liquid flows into the first working chamber 101 through the liquid inlet valve seat 611; meanwhile, the pressure in the second working chamber 102 gradually increases, the liquid inlet valve ball 612 of the second liquid inlet check valve 62 tightly abuts against the liquid inlet valve seat 611 under the action of positive pressure, the liquid inlet valve seat 611 is closed, so that the second liquid inlet check valve 62 is closed, the liquid outlet valve ball 622 of the second liquid outlet check valve 64 overcomes the elastic force of the liquid outlet spring 623 under the action of positive pressure, leaves the liquid outlet valve seat 621, the liquid outlet valve seat 621 is opened, and the second liquid outlet check valve 64 is opened. The liquid in the second working chamber 102 enters the outlet valve 8 through the outlet channel 12.

When the plunger rod 54 moves towards the first working chamber 101, the volume of the first working chamber 101 decreases to form positive pressure, the volume of the second working chamber 102 increases to form negative pressure, so that the first liquid inlet check valve 61 is closed and the first liquid outlet check valve 63 is opened, the second liquid inlet check valve 62 is opened and the second liquid outlet check valve 64 is closed, the liquid in the liquid storage container 2 enters the second working chamber 102, and the liquid in the first working chamber 101 enters the outlet valve 8 through the liquid outlet channel 12.

When the liquid pressure in the outlet valve 8 reaches a certain level, the elastic force of the outlet valve spring 82 of the outlet valve 8 is overcome, the valve core 81 of the outlet valve 8 is pushed open, and the liquid is sprayed out from the nozzle 3, so that the spraying function is realized.

The handheld high-pressure airless spray gun of the present embodiment can perform a spraying operation regardless of whether the plunger rod 54 moves from right to left or from left to right, and thus, the handheld high-pressure airless spray gun of the present embodiment realizes a full-cycle continuous operation, and improves the spraying efficiency.

It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. A hand-held high-pressure airless spray gun comprises a casing and a plunger pump assembly; the shell is provided with a plunger cavity, a liquid inlet channel and a liquid outlet channel; the plunger pump assembly is arranged in the shell and comprises a motor, a speed reducing mechanism, an eccentric wheel and a plunger rod, and the motor drives the eccentric wheel to rotate through the speed reducing mechanism; the plunger rod is characterized in that an eccentric wheel acting part is arranged on the side face of the rod body of the plunger rod, and the eccentric wheel acts on the eccentric wheel acting part to drive the plunger rod to move in a reciprocating mode in the plunger cavity;

the plunger pump assembly comprises a first plunger sleeve and a second plunger sleeve, the first plunger sleeve and the second plunger sleeve are fixedly arranged on the shell and are sleeved outside the plunger rod, the first plunger sleeve and the second plunger sleeve are respectively positioned on two sides of the action part of the eccentric wheel, a first working cavity is formed between the first plunger sleeve and one end of the plunger cavity, and a second working cavity is formed between the second plunger sleeve and the other end of the plunger cavity;

the machine shell is provided with a first liquid inlet interface, a second liquid inlet interface, a first liquid outlet interface and a second liquid outlet interface, the first liquid inlet interface and the second liquid inlet interface are respectively communicated with the liquid inlet channel, and the first liquid outlet interface and the second liquid outlet interface are respectively communicated with the liquid outlet channel; first feed liquor interface and first play liquid interface respectively with first working chamber intercommunication, second feed liquor interface and second play liquid interface respectively with second working chamber intercommunication is equipped with first feed liquor check valve, second feed liquor check valve, first play liquid check valve and second play liquid check valve respectively at first feed liquor interface, second feed liquor interface, first play liquid interface and second play liquid interface.

2. The hand-held high-pressure airless spray gun of claim 1, wherein the eccentric action is a groove disposed on the side of the plunger rod, the eccentric protruding into the groove.

3. The hand-held, high-pressure airless spray gun of claim 1, wherein the reduction mechanism is a two-stage gear reduction mechanism comprising a drive shaft, an eccentric shaft, a motor output gear, a first drive shaft gear, a second drive shaft gear, and an eccentric shaft gear;

the transmission shaft and the eccentric shaft are respectively and rotatably arranged on the shell; the motor output gear is connected with an output shaft of the motor, the first transmission shaft gear and the second transmission shaft gear are respectively connected with the transmission shaft and synchronously rotate with the transmission shaft, and the eccentric shaft gear is connected with the eccentric shaft and can drive the eccentric shaft to synchronously rotate;

the motor output gear is meshed with the first transmission shaft gear, and the number of teeth of the motor output gear is less than that of the first transmission shaft gear; the second transmission shaft gear is meshed with the eccentric shaft gear, and the number of teeth of the second transmission shaft gear is less than that of the eccentric shaft gear.

4. The hand-held high-pressure airless spray gun of claim 3, wherein the eccentric shaft comprises a main shaft and an eccentric portion, the eccentric portion being integrally connected to one end of the main shaft; the eccentric shaft gear sleeve is arranged on the main shaft, and the eccentric wheel sleeve is arranged on the eccentric part.

5. The handheld high-pressure airless spray gun of claim 1, wherein an axial direction of the motor coincides with a length direction of the handheld high-pressure airless spray gun, and an axial direction of the plunger rod coincides with a width direction of the handheld high-pressure airless spray gun.

6. The handheld high-pressure airless spray gun of claim 1, wherein the plunger pump assembly comprises a first plunger sleeve sealing ring and a second plunger sleeve sealing ring, the first plunger sleeve sealing ring is sleeved outside the first plunger sleeve, and the second plunger sleeve sealing ring is sleeved outside the second plunger sleeve.

7. The hand-held high-pressure airless spray gun of claim 6, wherein the housing comprises a housing body, a first working chamber seat and a second working chamber seat, the first working chamber seat and the second working chamber seat being detachably connected to the housing body, respectively;

the first plunger sleeve and the first plunger sleeve sealing ring are located in the first working cavity seat, and the second plunger sleeve sealing ring are located in the second working cavity seat.