Wear-resistant gear pump for printer

Abstract

The utility model discloses a wear-resistant gear pump for a printer, which relates to the technical field of printer accessories and comprises a pump body, a front sealing cover is mounted on the outer surface of the pump body, a lubricating oil component is arranged above the pump body and comprises an oil injection port, the oil injection port is formed in the upper surface of the pump body, and a lubricating oil outlet is formed in the lower surface of the pump body. A rear sealing cover is installed on the outer surface of the pump body, and a first bearing and a second bearing are embedded in the inner wall of the front sealing cover and the inner wall of the rear sealing cover correspondingly. According to the gear pump, the pump body, the lubricating oil assembly, the driving gear shaft and the driven gear shaft are matched, the first gear and the second gear are made of high-strength alloy steel, the tooth surfaces are specially treated, and the wear-resistant copper alloy lining is arranged in the pump body, so that the wear resistance of all parts of the gear pump is greatly improved; and the service life of the gear pump is effectively prolonged.

Description

Technical Field

[0001] This utility model relates to the field of printer accessories technology, specifically a wear-resistant gear pump for printers. Background Technology

[0002] During the operation of a printer, it is necessary to accurately deliver liquid media such as ink. Gear pumps, as a common liquid delivery device, play an important role in this process.

[0003] Traditional gear pumps often suffer from wear due to intense friction between the gears and the pump body, leading to poor ink delivery, affecting print quality, shortening printer lifespan, and increasing maintenance costs. Therefore, we offer a wear-resistant gear pump for printers to solve these problems. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a wear-resistant gear pump for printers.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a wear-resistant gear pump for a printer, comprising a pump body, a front sealing cover installed on the outer surface of the pump body, an oil lubrication assembly provided above the pump body, the oil lubrication assembly including an oil inlet located on the upper surface of the pump body, a rear sealing cover installed on the outer surface of the pump body, and a first bearing and a second bearing embedded in the inner walls of both the front and rear sealing covers.

[0006] Preferably, the inner wall of the oil inlet is threaded with a sealing bolt, the bottom surface of the sealing bolt is fitted with a sealing gasket, the bottom surface of the oil inlet is fixedly connected to an oil inlet pipe, and the other end of the oil inlet pipe is fixedly connected to the inner wall of the pump body.

[0007] Preferably, the inner walls of the two first bearings are rotatably connected to a drive gear shaft, and the outer surface of the drive gear shaft is fixedly connected to a first gear. The inner walls of the two second bearings are inlaid with a driven gear shaft, and the outer surface of the driven gear shaft is fixedly connected to a second gear. The first gear and the second gear mesh with each other.

[0008] Preferably, the front sealing cover and the rear sealing cover are each provided with a sealing lip on the side that is close to each other, and the two sealing lips are each provided with a dustproof lip on the side that is close to each other.

[0009] Preferably, the outer surface of the pump body is fixedly connected to an oil inlet and an oil outlet.

[0010] Preferably, the inner wall of the pump body has two buffer cavities, which are respectively connected to the oil inlet and the oil outlet.

[0011] Beneficial effects:

[0012] Compared with existing technologies, the wear-resistant gear pump used in this printer has the following advantages:

[0013] This invention significantly improves the wear resistance of the gear pump components and effectively extends its service life by optimizing the fit between the pump body, lubrication assembly, drive gear shaft, and driven gear shaft; using a first and second gear made of high-strength alloy steel with special surface treatment; and incorporating a wear-resistant copper alloy bushing inside the pump body.

[0014] This invention, through the cooperation between the first gear, the second gear, the sealing lip, the dustproof lip, and the buffer cavity, and due to the optimized tooth shape, the buffer cavity design, and the good lubrication and sealing system, makes the ink delivery in the gear pump more stable and accurate. It reduces the instability in delivery caused by the wear of the first and second gears and liquid impact, ensuring the stability of the printer's print quality. Furthermore, due to the improved wear resistance and extended service life of the gear pump, it reduces the economic and maintenance time costs caused by frequent gear pump replacements, thereby improving the overall efficiency and economy of the printer. Attached Figure Description

[0015] Figure 1 This is a three-dimensional front view structural diagram of the present invention;

[0016] Figure 2 This is a cross-sectional view of the internal structure of this utility model;

[0017] Figure 3 This is a cross-sectional view of the internal structure of this utility model;

[0018] Figure 4 This is a partial structural schematic diagram of the present invention.

[0019] In the diagram: 1. Pump body; 2. Front sealing cover; 3. Lubrication assembly; 301. Oil inlet; 302. Sealing bolt; 303. Sealing gasket; 304. Oil inlet pipe; 4. Rear sealing cover; 5. First bearing; 6. Second bearing; 7. Driven gear shaft; 8. Driven gear shaft; 9. First gear; 10. Second gear; 11. Sealing lip; 12. Dustproof lip; 13. Oil inlet; 14. Oil outlet; 15. Buffer chamber. Detailed Implementation

[0020] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0021] See Figures 1-4A wear-resistant gear pump for printers includes a pump body 1, a front sealing cover 2 installed on the outer surface of the pump body 1, and a wear-resistant copper alloy bushing inserted inside the pump body 1. The surfaces of the copper alloy bushing that contact the first gear 9 and the second gear 10 are precision machined to reduce the coefficient of friction between the gears and the bushing.

[0022] A lubrication assembly 3 is provided above the pump body 1. The lubrication assembly 3 includes an oil inlet 301, which is located on the upper surface of the pump body 1. Through the oil inlet 301, lubricating oil can be injected into the interior of the pump body 1, facilitating the subsequent introduction of lubricating oil into the meshing joint of the first gear 9 and the second gear 10 and the connection between the first gear 9 and the second gear 10 and the shaft. This ensures the lubrication of the first gear 9 and the second gear 10. The lubricating oil is a high viscosity index synthetic lubricating oil with good lubrication and anti-wear properties. It can form a stable oil film on the surface of the first gear 9 and the second gear 10, effectively reducing friction and wear.

[0023] The inner wall of the oil inlet 301 is threaded with a sealing bolt 302, and a sealing gasket 303 is fitted on the bottom surface of the sealing bolt 302. The bottom surface of the oil inlet 301 is fixedly connected to an oil guide pipe 304, and the other end of the oil guide pipe 304 is fixedly connected to the inner wall of the pump body 1. The oil guide pipe 304 can introduce lubricating oil into the meshing part of the first gear 9 and the second gear 10 and the connection part of the first gear 9 and the second gear 10 with the shaft. The sealing gasket 303 can play a sealing role to prevent dust from entering the gear pump from the oil inlet 301 and affecting the service life of the gear pump.

[0024] The pump body 1 has a rear sealing cover 4 installed on its outer surface. The inner walls of the front sealing cover 2 and the rear sealing cover 4 are each inlaid with a first bearing 5 and a second bearing 6. The inner walls of the two first bearings 5 ​​are rotatably connected to a drive gear shaft 7. The outer surface of the drive gear shaft 7 is fixedly connected to a first gear 9. The inner walls of the two second bearings 6 are inlaid with a driven gear shaft 8. The outer surface of the driven gear shaft 8 is fixedly connected to a second gear 10. The first gear 9 and the second gear 10 mesh. Both the first gear 9 and the second gear 10 are made of high-strength alloy steel, and the tooth surfaces of both the first gear 9 and the second gear 10 have been carburized and quenched to effectively improve the wear resistance of the tooth surfaces. At the same time, the tooth profiles of the first gear 9 and the second gear 10 are optimized by using a modified tooth profile to reduce the impact and sliding friction when the first gear 9 and the second gear 10 mesh, thereby reducing the degree of wear. Furthermore, transition fillets are set at the addendum circle and root circle of the first gear 9 and the second gear 10 to avoid stress concentration and further enhance the fatigue wear resistance of the first gear 9 and the second gear 10.

[0025] Both the front sealing cover 2 and the rear sealing cover 4 have sealing lips 11 on their adjacent sides, and both sealing lips 11 have dustproof lips 12 on their adjacent sides. The sealing lips 11 and dustproof lips 12 cooperate to form a double-lip sealing structure. Both are made of fluororubber, which has excellent oil resistance, wear resistance and chemical corrosion resistance. The sealing lips 11 and dustproof lips 12 can prevent external dust and other impurities from entering the gear pump and avoid impurities from aggravating the wear of the first gear 9 and the second gear 10 with the pump body 1.

[0026] The outer surface of the pump body 1 is fixedly connected to an oil inlet 13 and an oil outlet 14. The inner wall of the pump body 1 has two buffer chambers 15, which are respectively connected to the oil inlet 13 and the oil outlet 14. When ink enters and flows out of the pump body 1, the buffer chambers 15 can alleviate the impact of the liquid and reduce the scouring and wear on the first gear 9, the second gear 10 and the pump body 1. The buffer chambers 15 are funnel-shaped, with a large inlet that gradually narrows to connect with the internal flow channel of the pump body 1. The outlet also adopts a similar structure to ensure smooth ink flow.

[0027] Working principle: In use, first turn the sealing bolt 302 to remove it from the inside of the oil inlet 301. Then pour the lubricating oil into the oil inlet 301. The lubricating oil enters the meshing point of the first gear 9 and the second gear 10 and the connection point between the first gear 9 and the second gear 10 and the shaft through the oil pipe 304, thereby ensuring the lubrication of the first gear 9 and the second gear 10. The lubricating oil is a high viscosity index synthetic lubricating oil with good lubrication and anti-wear properties. It can form a stable oil film on the surface of the first gear 9 and the second gear 10, effectively reducing friction and wear. At the same time, the contents not described in detail in this specification are all prior art known to those skilled in the art.

[0028] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A wear-resistant gear pump for a printer, comprising a pump body (1), characterized in that: A front sealing cover (2) is installed on the outer surface of the pump body (1). A lubrication assembly (3) is provided on the top of the pump body (1). The lubrication assembly (3) includes an oil inlet (301). The oil inlet (301) is opened on the upper surface of the pump body (1). A rear sealing cover (4) is installed on the outer surface of the pump body (1). A first bearing (5) and a second bearing (6) are embedded in the inner walls of the front sealing cover (2) and the rear sealing cover (4).

2. The wear-resistant gear pump for printers according to claim 1, characterized in that: The inner wall of the oil inlet (301) is threaded with a sealing bolt (302), and a sealing gasket (303) is fitted on the bottom surface of the sealing bolt (302). The bottom surface of the oil inlet (301) is fixedly connected to an oil inlet pipe (304), and the other end of the oil inlet pipe (304) is fixedly connected to the inner wall of the pump body (1).

3. The wear-resistant gear pump for printers according to claim 1, characterized in that: The inner walls of the two first bearings (5) are rotatably connected to a drive gear shaft (7), and the outer surface of the drive gear shaft (7) is fixedly connected to a first gear (9). The inner walls of the two second bearings (6) are inlaid with a driven gear shaft (8), and the outer surface of the driven gear shaft (8) is fixedly connected to a second gear (10). The first gear (9) and the second gear (10) mesh with each other.

4. The wear-resistant gear pump for printers according to claim 1, characterized in that: The front sealing cover (2) and the rear sealing cover (4) are provided with sealing lips (11) on the side that are close to each other, and the two sealing lips (11) are provided with dustproof lips (12) on the side that are close to each other.

5. A wear-resistant gear pump for a printer according to claim 1, characterized in that: The outer surface of the pump body (1) is fixedly connected to an oil inlet (13), and the outer surface of the pump body (1) is fixedly connected to an oil outlet (14).

6. A wear-resistant gear pump for a printer according to claim 1, characterized in that: The pump body (1) has two buffer chambers (15) on its inner wall, and the two buffer chambers (15) are connected to the oil inlet (13) and the oil outlet (14) respectively.

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