A drive feeding structure for use inside a spraying equipment

Abstract

This utility model discloses a drive and feeding structure for use inside a spraying equipment, comprising: a drive system: a servo motor output end equipped with a pinion gear meshing with a planetary gear assembly; the planetary gear assembly includes two planetary gears mounted on a planetary carrier via pins, a gear ring meshing with the planetary gears, and a square keyway in the inner hole of the planetary carrier; a transmission system: one end of a transmission shaft is press-fitted to the keyway of the planetary carrier via a milled flat end, and the other end is equipped with a cam; a ball bearing is press-fitted onto the cam and mates with the inner hole of a connecting rod; the connecting rod has a ball-pin structure, and its U-shaped open end is connected to a plunger via a fixing pin and a retaining ring; and a pump system. This utility model adopts a planetary gear transmission structure combining a planetary carrier, double planetary gears, and an internal gear ring to achieve high torque output, smoother movement, and reduced pressure fluctuations.

Description

Technical Field

[0001] This utility model relates to the field of spraying equipment technology, specifically to a drive feeding structure used inside a spraying equipment. Background Technology

[0002] Existing spraying equipment typically uses spur gears or belts to drive piston pumps, which presents the following problems:

[0003] 1. Low transmission efficiency: Traditional gear transmission has unstable torque output, which affects the spraying pressure;

[0004] 2. Poor sealing: The single-stage sealing structure is prone to leakage, resulting in insufficient vacuum and poor atomization effect;

[0005] 3. Lack of pressure protection: Overpressure can easily damage the pump body and affect the lifespan of the equipment;

[0006] 4. High maintenance costs: Valve body components are not replaceable, making maintenance difficult.

[0007] To address the aforementioned issues, this invention proposes a novel three-channel pump-driven feeding structure, employing planetary gear transmission, triple sealing design, and intelligent pressure protection mechanism, which significantly improves spraying efficiency and equipment reliability. Utility Model Content

[0008] To solve the above-mentioned technical problems, the technical solution provided by this utility model is: a drive feeding structure for use inside a spraying equipment, comprising,

[0009] Drive system: The output end of the servo motor is equipped with a pinion gear that meshes with the planetary gear assembly; the planetary gear assembly includes two planetary gears mounted on the planet carrier by pins, a gear ring that meshes with the planetary gears, and a square keyway in the inner hole of the planet carrier;

[0010] Transmission system: One end of the drive shaft is press-fitted to the keyway of the planetary carrier through a milled flat end, and the other end is equipped with a cam; a ball bearing is press-fitted on the cam and fits with the inner hole of the connecting rod; the connecting rod has a ball pin structure, and its U-shaped open end is connected to the plunger through a fixed pin and a snap ring;

[0011] Pump body system: includes a pump body with an inlet, an outlet, and a vacuum chamber, the vacuum chamber containing the plunger; a sealing sleeve is provided outside the plunger, and double O-rings are provided on the outer circumference of the sealing sleeve to achieve double sealing inside and outside; the outlet is connected to an outlet valve assembly, and a reflux valve assembly and a closing switch assembly are provided on the side;

[0012] Fluid system: A closed-loop pipeline is formed between the pump body, paint bucket, and spray gun.

[0013] Furthermore, the ring gear of the planetary gear assembly is an internal ring gear, and the planetary gear meshes with both the motor pinion and the ring gear. The planetary carrier is fixed to the motor base by bearings.

[0014] Furthermore, the U-shaped opening end of the connecting rod is provided with a through hole that runs vertically through it, and a built-in bearing is used to fix the fixing pin. The upper end of the fixing pin is provided with a snap ring groove to achieve axial positioning.

[0015] Furthermore, the sealing sleeve is coaxially assembled with the vacuum chamber for compression, and two grooves are provided on its outer circle to install O-rings. A third O-ring is added at the internal connection to form a triple sealing structure.

[0016] The advantages of the utility model compared to the prior art are:

[0017] 1. High transmission efficiency and more stable operation

[0018] The structure of planetary gear transmission, consisting of a planetary carrier, double planetary gears, and an internal gear ring, achieves high torque output, smoother movement, and reduced pressure fluctuations. Compared to traditional gear or belt drives, the transmission method using cams, ball bearings, and connecting rods reduces energy loss by 15%, resulting in more efficient equipment operation.

[0019] 2. Significantly improved sealing performance and higher vacuum level.

[0020] The plunger sealing sleeve adopts a triple O-ring design, with an inner and outer double seal combined with an independent internal seal, which reduces the vacuum chamber leakage rate by 50%; the high sealing performance can maintain a stable negative pressure environment, improve the spraying pressure, and make the atomization effect more delicate and uniform. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of a drive feeding structure for use inside a spraying equipment according to the present invention.

[0022] Figure 2 This is a schematic diagram of the drive system.

[0023] Figure 3 This invention provides a reference for the use of a drive feeding structure for use inside a spraying equipment. Figure 1 ;

[0024] Figure 4 This invention provides a reference for the use of a drive feeding structure for use inside a spraying equipment. Figure 2 ;

[0025] Figure 5 This invention provides a reference for the use of a drive feeding structure for use inside a spraying equipment. Figure 3 ;

[0026] Figure 6This invention provides a reference for the use of a drive feeding structure for use inside a spraying equipment. Figure 4 ;

[0027] Figure 7 This invention provides a reference for the use of a drive feeding structure for use inside a spraying equipment. Figure 5 .

[0028] Among them, 1. Servo motor, 101. Pinion, 102. Motor base, 2. Planetary gear assembly, 201. Planetary carrier, 202. Planetary gear, 203. Internal gear ring, 3. Drive shaft, 303. Ball bearing, 4. Connecting rod, 401. Fixing pin, 402. Snap ring, 5. Plunger, 6. Pump body, 601. Inlet, 602. Outlet, 7. Outlet valve assembly, 701. Micro switch, 8. Return valve assembly, 801. Valve ball, 9. Closing switch assembly, 10. Paint bucket, 11. Transmission system housing. Detailed Implementation

[0029] The present invention will now be described in further detail with reference to the accompanying drawings.

[0030] The present invention will be described in detail with reference to the accompanying drawings.

[0031] In a specific implementation, this utility model provides a drive feeding structure for use inside a spraying equipment, comprising:

[0032] Drive system: Servo motor 1 has a pinion 101 at its output end, which meshes with planetary gear assembly 2; the planetary gear assembly includes two planetary gears 202 mounted on planet carrier 201 by pins, and a gear ring 203 meshing with the planetary gears; the inner hole of the planet carrier has a square keyway.

[0033] Transmission system: One end of the drive shaft 3 is press-fitted to the keyway of the planetary carrier through a milled flat end, and the other end is provided with a cam; a ball bearing 303 is press-fitted on the cam and fits with the inner hole of the connecting rod 4; the connecting rod has a ball pin structure, and its U-shaped open end is connected to the plunger 5 through a fixing pin 401 and a snap ring 402;

[0034] Pump body system: includes a pump body with an inlet 601, an outlet 602, and a vacuum chamber. The vacuum chamber is equipped with the plunger. The plunger is equipped with a sealing sleeve, and the outer circle of the sealing sleeve is equipped with double O-rings to achieve double sealing inside and outside. The outlet is connected to the outlet valve assembly 7, and a reflux valve assembly 8 and a closing switch assembly 9 are provided on the side.

[0035] Fluid system: A closed-loop pipeline is formed between the pump body, paint bucket 10, and spray gun.

[0036] Example:

[0037] I. Drive System Assembly

[0038] The pinion 101 of the servo motor 1 meshes with the planetary gear 202;

[0039] The planetary carrier 201 is fixed to the motor base 102 by bearings.

[0040] II. Transmission System Connection

[0041] The milled flat end of drive shaft 3 is pressed into the keyway of planetary carrier;

[0042] After the cam is fitted with a ball bearing, it mates with the inner hole of connecting rod 4.

[0043] III. Pump Body Seal Assembly

[0044] After the plunger 5 is inserted into the sealing sleeve 501, it is pressed into the vacuum chamber;

[0045] Install the inner and outer O-rings in sequence to form a triple seal.

[0046] IV. Valve Installation

[0047] The discharge valve assembly 7 and the return valve assembly 8 are respectively threaded to the corresponding interfaces on the pump body;

[0048] When the sealing rod 901 of the closed switch 9 is aligned with the pressure chamber, overpressure power-off protection is achieved.

[0049] V. Working Principle

[0050] Start-up phase: The motor drives the planetary gear set to reduce the speed and increase the torque;

[0051] The drive shaft drives the cam to rotate, which in turn pushes the connecting rod to perform horizontal reciprocating motion.

[0052] Paint delivery: The plunger creates negative pressure in the vacuum chamber, and the paint is drawn in from the inlet 601;

[0053] After being pressurized by the discharge valve 7, it is ejected from the nozzle.

[0054] Pressure protection: When the system pressure exceeds the set value, closing switch 9 triggers power cut-off;

[0055] The backflow valve 8 prevents paint from flowing back when the machine is stopped, thus protecting the pump body.

[0056] As a further explanation of this utility model, the ring gear 203 of the planetary gear assembly 2 is an internal ring gear, and the planetary gear 202 meshes with both the motor pinion 101 and the ring gear. The planetary carrier 201 is fixed to the motor base 102 by bearings. This structure enables high torque output, improves the stability of the entire device during use, and is suitable for conveying high-viscosity coatings.

[0057] As a further explanation of this utility model, the U-shaped opening end of the connecting rod 4 is provided with a through hole running vertically through it, and a built-in bearing is used to fix the fixing pin 401. The upper end of the fixing pin is provided with a retaining spring groove to achieve axial positioning. The above structure can ensure the stability of the connecting rod structure and prevent loosening during high-speed reciprocating motion.

[0058] As a further explanation of this utility model, the sealing sleeve is coaxially assembled with the vacuum chamber for compression, and its outer circumference has two grooves for installing O-rings. A third O-ring is added at the internal connection to form a triple sealing structure. The above structure adopts a triple sealing structure, which can increase the sealing performance of the entire device and prevent paint leakage from contaminating the equipment.

[0059] As a further explanation of this utility model, the backflow valve assembly 8 includes a first valve ball 801, a valve seat, a spring, a valve stem, and a valve body, which is connected to the pump body via an external thread to realize unidirectional fluid flow and loop switching functions. The above structure ensures unidirectional movement of the coating material, and the above parts are easy to disassemble and replace. It prevents coating backflow from causing the pump body to run dry, while also reducing maintenance costs.

[0060] As a further explanation of this utility model, the closing switch assembly 9 includes a sealing rod, a pressure spring, and a micro switch. When the pump body pressure exceeds a threshold, the compression spring triggers the switch to cut off the power, and it automatically resets after the pressure drops. This structure prevents paint backflow from causing the pump to run dry, while also reducing maintenance costs.

[0061] As a further explanation of this utility model, the discharge valve assembly 7 is a one-way valve structure, including a valve stem 701, a second valve ball, and a compression spring 703, which connects to the pump body via a thread to ensure that fluid only flows out and not in. This structure ensures continuous spraying and avoids uneven atomization caused by pressure fluctuations.

[0062] As a further explanation of this utility model, the transmission system housing 11 is provided with a through-type heat dissipation opening and is fixedly connected to the motor base 102 by four screws. This structure can extend the life of the motor and gears, and is suitable for industrial scenarios involving long-term continuous operation.

[0063] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A drive feed structure for use inside a spray application apparatus, characterized by: include, Drive system: The output end of the servo motor (1) is provided with a pinion (101) that meshes with the planetary gear assembly (2); the planetary gear assembly includes two planetary gears (202) mounted on the planetary carrier (201) by pins and a gear ring (203) that meshes with the planetary gears; the inner hole of the planetary carrier is provided with a square keyway. Transmission system: One end of the transmission shaft (3) is press-fitted to the keyway of the planetary carrier through a milled flat end, and the other end is provided with a cam; a ball bearing (303) is press-fitted on the cam and fits with the inner hole of the connecting rod (4); the connecting rod has a ball pin structure, and its U-shaped open end is connected to the plunger (5) through a fixed pin (401) and a snap ring (402); Pump body system: includes a pump body with an inlet (601), an outlet (602) and a vacuum chamber, wherein the plunger is provided in the vacuum chamber; a sealing sleeve is provided outside the plunger, and a double O-ring is provided on the outer circle of the sealing sleeve to achieve double sealing inside and outside; the outlet is connected to the outlet valve assembly (7), and a reflux valve assembly (8) and a closing switch assembly (9) are provided on the side; Fluid system: A closed-loop pipeline is formed between the pump body, paint bucket (10), and spray gun.

2. A drive feed structure for use in the interior of a spray application apparatus according to claim 1, wherein: The ring gear (203) of the planetary gear assembly (2) is an internal ring gear. The planetary gear (202) meshes with both the motor pinion (101) and the ring gear. The planetary carrier (201) is fixed to the motor base (102) by bearings (204).

3. A drive feed structure for use in the interior of a spray application apparatus according to claim 1, wherein: The connecting rod (4) has a through hole at the U-shaped opening end, and a built-in bearing to fix the fixing pin (401). The upper end of the fixing pin has a snap ring groove (404) to achieve axial positioning.

4. A drive feed structure for use inside a spray application apparatus according to claim 1, wherein: The sealing sleeve is coaxially assembled with the vacuum chamber for compression. Two grooves are provided on its outer circle to install O-rings, and a third O-ring is added at the internal connection to form a triple sealing structure.

5. A drive feed structure for use in the interior of a spray application apparatus as defined in claim 1, wherein: The reflux valve assembly (8) includes a first valve ball (801), a valve seat, a spring, a valve stem, and a valve body. It is connected to the pump body via an external thread to realize unidirectional fluid flow and loop switching functions.

6. A drive feed structure for use in the interior of a spray application apparatus according to claim 1, wherein: The closing switch assembly (9) includes a sealing rod, a pressure spring and a micro switch. When the pump body pressure exceeds the threshold, the compression spring triggers the switch to cut off the power. After the pressure drops, it automatically resets.

7. A drive feeding structure for use inside a spraying equipment according to claim 1, characterized in that: The discharge valve assembly (7) is a one-way valve structure, including a valve stem (701), a second valve ball and a compression spring, which connects to the pump body via a thread to achieve fluid only discharge and not inflow.

8. A drive feeding structure for use inside a spraying equipment according to any one of claims 1-7, characterized in that: The transmission system housing (11) is provided with a through-type heat dissipation opening and is fixedly connected to the motor base by four screws.

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