Diaphragm pump spraying machine

Abstract

A diaphragm pump spraying machine comprises a diaphragm pump, an oil tank and a driving mechanism. The diaphragm pump comprises a pump body and a piston, the pump body is provided with a cavity, one end of the piston extends into the cavity, and the other end of the piston and one end of the pump body extend into the oil tank. The driving mechanism comprises a motor and an eccentric transmission mechanism, the eccentric transmission mechanism comprises a rotating shaft and a driving part, the rotating shaft is in transmission connection with the motor, and the driving part is installed on the rotating shaft. A relatively closed driving chamber is arranged in the oil tank; the two ends of the rotating shaft are rotatably supported on a first side wall and a second side wall on the two opposite sides of the driving chamber respectively; the driving piece is located in the driving chamber and connected with the other end, stretching into the driving chamber, of the piston in an abutting mode so as to drive the piston to move in a reciprocating mode. According to the invention, the motor power consumption is low and the service life is long.

Description

Technical Field

[0001] The invention relates to spraying equipment. Background Art

[0002] The diaphragm pump sprayer mainly includes a diaphragm pump, a driving mechanism, an oil tank, a spray gun and other components. The diaphragm pump includes a pump body, a diaphragm, a piston, a return spring and the like. The pump body has a pump chamber, which is divided into a first chamber and a second chamber by a diaphragm. The feed port and the discharge port of the first chamber are respectively connected to the paint storage container and the spray gun. One end of the piston extends into the second chamber, and the other end of the piston and one end of the pump body extend into the oil tank. The driving mechanism includes a motor and an eccentric transmission mechanism driven by the motor. The eccentric transmission mechanism is arranged in the oil tank. The eccentric transmission mechanism is connected to the other end of the piston to drive the piston to reciprocate. When the piston reciprocates, the diaphragm is driven to reciprocate and deform by the hydraulic oil to change the volume of the first chamber, thereby discharging the paint sucked from the feed port to the discharge port. One end of the return spring is connected to the piston, and the other end abuts the pump body to achieve the resetting of the piston.

[0003] The known eccentric transmission mechanism includes a rotating shaft and an eccentric wheel, wherein the rotating shaft is connected to the motor by transmission, and the eccentric wheel is mounted on the rotating shaft and is connected to the other end of the piston to drive the piston to reciprocate. Since the rotating shaft and the eccentric wheel of the eccentric transmission mechanism stir the hydraulic oil in the entire oil tank when they rotate, the power consumption of the motor is relatively large. In addition, the rotating shaft of the eccentric transmission mechanism is usually a cantilever structure, and since one end of the rotating shaft lacks support, the service life of the rotating shaft and the entire machine is affected. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a diaphragm pump sprayer with lower motor power consumption and longer service life.

[0005] A diaphragm pump sprayer according to an embodiment of the present invention comprises a diaphragm pump, an oil tank and a driving mechanism; the diaphragm pump comprises a pump body and a piston, the pump body has a chamber, one end of the piston extends into the chamber, and the other end of the piston and one end of the pump body extend into the oil tank; the driving mechanism comprises a motor and an eccentric transmission mechanism, the eccentric transmission mechanism comprises a rotating shaft and a driving member, the rotating shaft is transmission-connected to the motor, the driving member is mounted on the rotating shaft and is connected in contact with the other end of the piston to drive the piston to reciprocate; its characteristic is that a relatively closed driving chamber is provided in the oil tank; the two ends of the rotating shaft are rotatably supported on the first side wall and the second side wall on opposite sides of the driving chamber respectively; the driving member is located inside the driving chamber and is connected in contact with the other end of the piston extending into the driving chamber.

[0006] The present invention has at least the following advantages:

[0007] 1. In the embodiment of the present invention, a relatively closed driving chamber is arranged in the oil tank, so that the stirring area of ​​the rotating shaft and the driving member in the oil tank is only carried out inside the driving chamber, and the stirring area is reduced, thereby greatly reducing the power consumption of the motor and achieving the effect of energy saving;

[0008] 2. Both ends of the rotating shaft of the embodiment of the present invention are supported, which prolongs the service life of the rotating shaft and the entire machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 A cross-sectional schematic diagram of a diaphragm pump sprayer according to an embodiment of the present invention is shown.

[0010] Figure 2 Schematic diagrams of the appearance of support covers according to embodiments of the present invention.

[0011] Figure 3 A schematic diagram of the appearance of an oil tank according to an embodiment of the present invention is shown.

[0012] Figure 4 A schematic diagram of the appearance of a piston according to an embodiment of the present invention is shown. DETAILED DESCRIPTION

[0013] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0014] Please refer to Figures 1 to 4 The diaphragm pump spraying machine 100 according to the embodiment of the present invention comprises a diaphragm pump 1 , a driving mechanism 2 , a machine body 3 and an oil tank 4 .

[0015] The diaphragm pump 1 comprises a pump body 11, a diaphragm 12, a piston 13, and a return spring 14. The pump body 11 has a pump cavity, which is divided into a first chamber 111 and a second chamber 112 by the diaphragm 12. The first chamber 111 has a feed port 113 connected to a paint storage container and a discharge port (not shown in the figure) connected to a spray gun. One end of the piston 13 extends into the second chamber 112, and the other end of the piston 13 and one end of the pump body 11 extend into the oil tank 4. One end of the return spring 14 is connected to the piston 13, and the other end abuts the pump body 11, for realizing the reset of the piston 13. In this embodiment, the piston 13 has a piston cavity 130 opened to one end, and the side of the piston 13 is provided with an oil inlet through hole 131 connected to the piston cavity 130. The oil tank 4 is connected to the side of the body 1, and the diaphragm pump 1 is arranged above the oil tank 4.

[0016] The driving mechanism 2 includes a motor 21 and an eccentric transmission mechanism driven by the motor 21. The motor 21 is installed on the machine body 3. The eccentric transmission mechanism is arranged in the oil tank 4. The eccentric transmission mechanism includes a rotating shaft 23 and a driving member 24. The rotating shaft 23 is connected to the motor 21 in a transmission manner. The driving member 24 is installed on the rotating shaft 23 and is connected to the other end of the piston 13 to drive the piston 13 to reciprocate. When the piston 13 reciprocates, the diaphragm 12 is driven by the hydraulic oil to reciprocate and deform, so as to change the volume of the first chamber 111, so as to discharge the paint sucked from the feed port 113 to the discharge port. Specifically, when the piston 13 moves toward the oil tank, the hydraulic oil in the oil tank 4 will be sucked in through the oil inlet hole 131 and the tail rod 121 of the diaphragm 12 will be pulled to move toward the oil tank, thereby driving the diaphragm 12 to deform toward the second chamber 112. When the piston 13 moves toward the pump body, the hydraulic oil pushes the tail rod 121 of the diaphragm 12 to move toward the pump body, thereby driving the diaphragm 12 to deform toward the first chamber 111.

[0017] In this embodiment, the rotating shaft 23 is an eccentric shaft, the outer circumference of the driving member 24 is circular, and the outer circumference of the driving member 24 is in contact with the other end of the piston 13. More specifically, the driving member 24 is a driving wheel, which is sleeved outside the rotating shaft 23 and has an interference fit with the rotating shaft 23. Preferably, the driving wheel is a bearing, and the inner ring of the bearing has an interference fit with the rotating shaft 23.

[0018] The oil tank 4 has a relatively closed driving chamber 41. The two ends of the rotating shaft 23 are rotatably supported on the first side wall and the second side wall on the opposite sides of the driving chamber 41; the driving member 24 is located inside the driving chamber 41 and is in contact with the other end of the piston 13 extending into the driving chamber 41.

[0019] In this embodiment, the relatively closed driving chamber 41 is defined by a support cover 5 and the inner wall of the oil tank 4. The support cover 5 includes a top wall 51 and a surrounding side wall 52, the periphery of the top wall 51 is connected to one end of the surrounding side wall 52, and the other end of the surrounding side wall 52 is connected to the inner wall of the oil tank 4. Specifically, the other end of the surrounding side wall 52 is provided with a mounting flange 53, and the mounting flange 53 is detachably connected to the inner wall of the oil tank 4 through a plurality of fasteners. Preferably, the fastener is a threaded fastener such as a screw.

[0020] The two ends of the rotating shaft 23 are rotatably supported on the inner wall of the oil tank 4 and the top wall 51 of the support cover through the bearings 6. The surrounding side wall 52 is provided with a through hole 523, and the other end of the piston 13 passes through the through hole 523 and extends into the driving chamber 41.

[0021] In other embodiments, the relatively closed driving chamber 41 is defined by an independent box body, which is fixedly disposed in the oil tank 4, and both ends of the rotating shaft 23 are rotatably supported on two opposite side walls of the box body through bearings.

[0022] In this embodiment, the driving mechanism 2 further includes a reduction mechanism, and the output shaft end 211 of the motor 21 is transmission-connected to the rotating shaft 23 via the reduction mechanism; the output shaft end 211 of the motor and the reduction mechanism are both disposed in the driving chamber 41 .

[0023] Specifically, the speed reduction mechanism includes a first gear 71 disposed at the output shaft end 211 of the motor 21 and a second gear 72 disposed on the rotating shaft 23 and meshing with the first gear 71. The output shaft end 211 of the motor 21, the first gear 71 and the second gear 72 are all located in the driving chamber 41. In this embodiment, the first gear 71 is integrally formed with the motor output shaft end 211.

[0024] The embodiment of the present invention sets a relatively closed driving chamber in the oil tank, so that the stirring area of ​​the output shaft end of the motor, the speed reduction mechanism, the rotating shaft and the driving member in the oil tank is only carried out inside the driving chamber, and the stirring area is reduced, thereby greatly reducing the power consumption of the motor and achieving the effect of energy saving. At the same time, both ends of the rotating shaft are supported, which prolongs the working life of the rotating shaft and the whole machine.

[0025] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A diaphragm pump sprayer, comprising a diaphragm pump, an oil tank and a driving mechanism; the diaphragm pump comprises a pump body and a piston, the pump body has a chamber, one end of the piston extends into the chamber, and the other end of the piston and one end of the pump body extend into the oil tank; the driving mechanism comprises a motor and an eccentric transmission mechanism, the eccentric transmission mechanism comprises a rotating shaft and a driving member, the rotating shaft is connected to the motor in a transmission manner, the driving member is installed on the rotating shaft and is connected to the other end of the piston in a contact manner to drive the piston to reciprocate; characterized in that The oil tank has a relatively closed driving chamber; the two ends of the rotating shaft are rotatably supported on the first side wall and the second side wall on the opposite sides of the driving chamber respectively; The driving member is located inside the driving chamber and is connected to and abuts against the other end of the piston extending into the driving chamber.

2. The diaphragm pump sprayer according to claim 1, characterized in that: The diaphragm pump sprayer includes a support cover, the support cover includes a top wall and a surrounding side wall, the periphery of the top wall is connected to one end of the surrounding side wall, the other end of the surrounding side wall is connected to the inner wall of the oil tank, and the support cover and the inner wall of the oil tank jointly define the driving chamber; The two ends of the rotating shaft are rotatably supported on the inner wall of the oil tank and the top wall of the support cover through bearings respectively; the surrounding side wall is provided with a through hole, and the other end of the piston passes through the through hole and extends into the driving chamber.

3. The diaphragm pump sprayer according to claim 2, characterized in that: The other end of the surrounding side wall is provided with a mounting flange, and the mounting flange is detachably connected to the inner wall of the oil tank through a plurality of fasteners.

4. The diaphragm pump sprayer according to claim 1 or 2, characterized in that: The driving mechanism comprises a reduction mechanism, and the output shaft end of the motor is drivingly connected to the rotating shaft via the reduction mechanism; the output shaft end of the motor and the reduction mechanism are both arranged in the driving chamber.

5. The diaphragm pump sprayer according to claim 4, characterized in that: The speed reduction mechanism includes a first gear disposed at the end of the output shaft of the motor and a second gear disposed on the rotating shaft and meshing with the first gear. The end of the output shaft of the motor, the first gear and the second gear are all located in the driving chamber.

6. The diaphragm pump sprayer according to claim 5, characterized in that: The first gear is integrally formed with the end of the motor output shaft.

7. The diaphragm pump sprayer according to claim 1, characterized in that: The rotating shaft is an eccentric shaft, the outer peripheral surface of the driving member is circular, and the outer peripheral surface of the driving member is in contact with the other end of the piston and is connected.

8. The diaphragm pump sprayer according to claim 7, characterized in that: The driving member is a driving wheel, which is sleeved outside the rotating shaft and has an interference fit with the rotating shaft.

9. The diaphragm pump sprayer according to claim 8, characterized in that: The driving wheel is a bearing, and the inner ring of the bearing is interference fit with the rotating shaft.

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