A scraping device for oil cylinder of oil pump

Abstract

The utility model discloses an oil scraping device for oil cylinder of oil pump for installing on the oil squeezing plate and scraping the inner wall of oil cylinder, which comprises an oil scraping plate and an elastomer, wherein the oil scraping plate is vertically installed on the oil squeezing plate, the oil scraping plate is made of hard material, the elastomer is installed on the oil scraping plate, and the side of the elastomer close to the inner wall of the oil cylinder is tightly attached to the inner wall of the oil cylinder. The utility model has the advantages of simple structure, small size, low cost and reliable work, and the oil scraping effect is better, and the elastomer is easy to replace after wearing.

Description

Technical Field

[0001] This utility model relates to the field of lubrication pump technology, and in particular to an oil scraping device for an oil pump. Background Technology

[0002] The oil storage component of an electric lubricating grease pump typically has a built-in rotating scraper or pressure plate structure. The scraper structure is more widely used due to its simplicity and lower cost compared to the pressure plate structure. Currently, most scrapers on the market use a tubular component or a pointed nylon scraper directly attached to the scraper plate where it contacts the inner wall of the oil cylinder. In these cases, the nylon tubing has a gap with the inner wall of the oil cylinder, resulting in ineffective scraping. Furthermore, the nylon scraper is prone to abrasion of the inner wall of the oil cylinder. When dealing with high-viscosity greases, the pointed part in contact with the inner wall is susceptible to plastic deformation and curling due to grease resistance during prolonged operation. This curling creates a large gap between the scraper edge and the inner wall of the oil cylinder, rendering it ineffective at scraping and causing grease to adhere to the cylinder wall. Both of these structures present the problem of not being able to observe the grease level in the oil cylinder through the cylinder wall when dealing with high-viscosity, low-transparency greases. Utility Model Content

[0003] The purpose of this utility model is to provide an oil scraping device for an oil pump. This utility model has the advantages of simple structure, small size, low cost and reliable operation. It not only has a better oil scraping effect, but is also easy to replace after wear.

[0004] To achieve the above objectives, this utility model provides the following technical solution: an oil pump cylinder scraping device, used to scrape oil from the inner wall of the oil cylinder by being installed on an oil squeezing plate; comprising an oil scraping plate and an elastomer, wherein the oil scraping plate is vertically installed on the oil squeezing plate and is made of a hard material, and the elastomer is installed on the oil scraping plate, and the side of the elastomer closest to the inner wall of the oil cylinder is in close contact with the inner wall of the oil cylinder.

[0005] By adopting the above technical solution, the elastomer is a material that can deform after being subjected to force and can return to its original shape after the external force is removed. The oil scraper is made of a hard material and has strong rigidity, providing reliable support for the elastomer. By using the method of tightly fitting the elastomer to the inner wall of the oil cylinder, the oil scraping effect can be improved. Moreover, due to the softness of the elastomer material, it will not damage the inner wall of the oil cylinder. It has the advantages of simple structure, small size, low cost and reliable operation.

[0006] The present invention is further configured such that the oil scraper has a vertically extending positioning groove on the side near the inner wall of the oil cylinder, the elastic body is interference-fitted into the positioning groove, and the elastic body portion extends out of the positioning groove to form an elastic oil scraping part.

[0007] By adopting the above technical solution, the elastomer is interference-fitted into the positioning groove of the oil scraper and fixed by its own elasticity. The assembly structure is simple and the disassembly and assembly are very convenient. It is easy to replace the elastomer after it wears out. In addition, the part of the elastomer extends out of the positioning groove to form an elastic oil scraping part, which can prevent the oil scraper from damaging the inner wall of the oil cylinder. At the same time, when the elastic oil scraping part wears out, it can also rely on its own elasticity to compensate, so that it always sticks to the inner wall of the oil cylinder within a certain wear range.

[0008] The present invention is further configured such that the oil scraper is provided with an oil passage at a position corresponding to the lower part of the positioning groove.

[0009] By adopting the above technical solution, the oil scraping resistance and motor power consumption can be reduced during the oil scraping process.

[0010] The present invention is further configured such that the depth of the positioning groove is greater than two-thirds of the thickness of the elastic body.

[0011] By adopting the above technical solution, the elastomer installation becomes more stable and will not come off due to the resistance of high-viscosity grease.

[0012] The present invention is further configured such that the elastomer is installed on the scraper plate by means of fasteners or snap-fit.

[0013] By adopting the above technical solutions, the elastomer can also be fixed to the scraper plate by fasteners (screw connection) or snap-fit ​​methods with multiple tongue and groove joints, which can diversify the installation methods and adapt to different installation spaces and cost requirements.

[0014] The present invention is further configured such that the straight-line distance from the oil scraping surface of the elastomer to the rotation center of the oil squeezing plate is greater than the radius of the inner wall of the oil cylinder.

[0015] By adopting the above technical solution, the elastomer is compressed by extrusion so that the oil-scraping surface of the elastomer is in close contact with the inner wall of the oil cylinder, avoiding gaps between the two and thus ensuring a good oil-scraping effect.

[0016] The present invention is further configured such that the elastomer is made of silicone sponge material.

[0017] By adopting the above technical solution, the silicone sponge is a porous elastic material made of silicone. It not only has good elasticity, but also excellent durability and stability, which can effectively ensure the oil scraping effect of the oil scraping device and extend its service life.

[0018] The present invention is further provided that the bottom of the oil scraper is provided with a mounting plate, and the mounting plate is detachably connected to the oil squeezing plate by at least two connecting screws.

[0019] By adopting the above technical solution, the oil scraper is installed on the oil squeezing plate by screw connection, which is simple and reliable in connection structure and very convenient in disassembly and assembly.

[0020] The present invention is further configured such that the installation position of the elastomer is offset from the center plane of the oil extrusion plate extension direction.

[0021] By adopting the above technical solution, the installation size of the scraper blade can be reduced and the force on the motor rotation can be optimized.

[0022] The present invention is further configured such that the oil scraper and the oil extrusion plate are integrally formed or welded onto the oil extrusion plate.

[0023] By adopting the above technical solutions, there are two other structures for the oil scraper and the oil squeezer. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the oil scraping device of this utility model mounted on an oil pump; Figure 2 This is a schematic diagram of the structure of the oil scraping device of this utility model, in which the elastomer is installed on the oil scraping plate; Figure 3 This is a schematic diagram of the oil scraping device of this utility model, showing the structure in which the elastomer and the oil scraping plate are separated.

[0025] In the diagram: 1. Oil squeezing plate; 2. Oil cylinder; 3. Oil scraper; 4. Elastomer; 5. Positioning groove; 6. Elastic oil scraper; 7. Oil outlet; 8. Mounting plate; 9. Connecting screw; 10. Oil pump body; 11. Drive motor shaft. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Example: As attached Figures 1-3The oil pump oil cylinder scraping device shown is used to scrape oil from the inner wall of the oil cylinder 2 by being installed on the oil squeezing plate 1. More specifically, the oil cylinder 2 is installed above the oil pump body 10 of the lubrication pump. The oil cylinder 2 has a drive motor shaft 11 inside, and the oil squeezing plate 1 is installed on the drive motor shaft 11. When the drive motor is working, the drive motor shaft 11 drives the oil squeezing plate 1 to rotate. It includes an oil scraper 3 and an elastic body 4. The oil scraper 3 is installed vertically on the oil squeezing plate 1. The oil scraper 3 is made of a hard material (such as a hard metal material with high rigidity). The elastic body 4 is installed on the oil scraper 3, and the side of the elastic body 4 near the inner wall of the oil cylinder 2 is in close contact with the inner wall of the oil cylinder 2. The elastomer 4 is a material that deforms under stress and returns to its original shape after the external force is removed. The scraper blade 3 is made of a hard material and has high rigidity, providing reliable support for the elastomer 4. By using the method of tightly fitting the elastomer 4 with the inner wall of the oil cylinder 2, the oil scraping effect can be improved. Moreover, due to the softness of the elastomer 4 material, it will not damage the inner wall of the oil cylinder 2. It has the advantages of simple structure, small size, low cost and reliable operation.

[0028] For oils of different colors, an elastomer with a color that contrasts more sharply with the oil color can be selected.

[0029] As attached Figure 2 and attached Figure 3 As shown, the oil scraper 3 has a vertically extending positioning groove 5 on the side near the inner wall of the oil cylinder 2. The elastic body 4 is interference-fitted into the positioning groove 5, and a portion of the elastic body 4 extends out of the positioning groove 5 to form an elastic oil scraping part 6. In this embodiment, the cross-section of the oil scraper 3 is U-shaped. The elastic body 4 is interference-fitted into the positioning groove 5 of the oil scraper 3 and is fixed by its own elasticity. The assembly structure is simple and the disassembly and assembly are very convenient, which facilitates the replacement of the elastic body 4 after wear. In addition, the elastic body 4 extending out of the positioning groove 5 to form the elastic oil scraping part 6 can prevent the oil scraper 3 from damaging the inner wall of the oil cylinder 2. At the same time, when the elastic oil scraping part 6 wears, it can also compensate by its own elasticity, so that it always sticks to the inner wall of the oil cylinder 2 within a certain wear range.

[0030] To further enhance the stability of the elastomer 4 installation, the inner wall of the positioning groove 5 may be provided with a rib structure for pressing against the surface of the elastomer 4.

[0031] As attached Figure 1 As shown, the oil scraper 3 has an oil passage 7 located below the positioning groove 5. During the oil scraping process, this reduces the oil scraping resistance and motor power consumption.

[0032] The depth of the positioning groove 5 is greater than two-thirds of the thickness of the elastomer 4, which makes the installation of the elastomer 4 more stable and prevents it from falling off due to the resistance of high-viscosity grease.

[0033] The elastomer 4 is installed on the scraper blade 3 by fasteners or snap-fit. The elastomer 4 can also be fixed on the scraper blade 3 by fasteners (screw connection) or snap-fit ​​with multiple tongue and groove joints, which provides a variety of installation methods to adapt to different installation space and cost requirements.

[0034] In this design, the straight-line distance from the oil-scraping surface of the elastomer 4 to the rotation center of the oil-squeezing plate 1 is greater than the radius of the inner wall of the oil cylinder 2, and the height of the oil-scraping plate 3 is less than the height of the oil cylinder 2. By squeezing, the elastomer 4 is compressed so that the oil-scraping surface of the elastomer 4 is in close contact with the inner wall of the oil cylinder 2, avoiding gaps between them and thus ensuring a good oil-scraping effect.

[0035] The elastomer 4 can be made of silicone sponge. Silicone sponge is a porous elastic material made of silicone, which not only has good elasticity but also excellent durability and stability, effectively ensuring the oil-scraping effect of the oil scraping device and extending its service life.

[0036] As attached Figure 1 As shown, the bottom of the scraper plate 3 is provided with a mounting plate 8, which is formed by bending the bottom of the scraper plate 3. The mounting plate 8 is detachably connected to the oil squeezing plate 1 by at least two connecting screws 9. That is, the mounting plate 8 has mounting holes for the connecting screws 9 to pass through, and the oil squeezing plate 1 has screw holes for the connecting screws 9 to be screwed in. The scraper plate 3 is installed on the oil squeezing plate 1 by screw connection, which is simple and reliable in connection structure and very convenient in disassembly and assembly.

[0037] As attached Figure 1 As shown, the installation position of the elastomer 4 is offset from the center plane of the oil scraper 1 extending direction. This design can reduce the installation size of the scraper 3 and optimize the force on the motor rotation.

[0038] As a preferred embodiment, the oil scraper 3 and the oil extrusion plate 1 can also be integrally formed or welded onto the oil extrusion plate 1.

Claims

1. An oil pump oil cylinder scraping device, used to scrape oil from the inner wall of an oil cylinder (2) by mounting it on an oil squeezing plate (1); characterized in that: It includes an oil scraper (3) and an elastomer (4). The oil scraper (3) is vertically mounted on the oil squeezing plate (1). The oil scraper (3) is made of a hard material. The elastomer (4) is mounted on the oil scraper (3), and the side of the elastomer (4) close to the inner wall of the oil cylinder (2) is tightly attached to the inner wall of the oil cylinder (2).

2. The oil scraping device for an oil pump according to claim 1, characterized in that: The oil scraper (3) has a vertically extending positioning groove (5) on the side near the inner wall of the oil cylinder (2). The elastic body (4) is interference-fitted into the positioning groove (5), and part of the elastic body (4) extends out of the positioning groove (5) to form an elastic oil scraping part (6).

3. The oil scraping device for an oil pump according to claim 2, characterized in that: The oil scraper (3) is provided with an oil outlet (7) at the position below the positioning groove (5).

4. The oil scraping device for an oil pump according to claim 2, characterized in that: The depth of the positioning groove (5) is greater than two-thirds the thickness of the elastomer (4).

5. The oil scraping device for an oil pump according to claim 1, characterized in that: The elastomer (4) is installed on the scraper (3) by means of fasteners or snap-fit.

6. The oil scraping device for an oil pump according to claim 1, characterized in that: The straight-line distance from the oil scraping surface of the elastomer (4) to the rotation center of the oil squeezing plate (1) is greater than the inner wall radius of the oil cylinder (2).

7. The oil scraping device for an oil pump according to claim 1, characterized in that: The elastomer (4) is made of silicone sponge material.

8. The oil scraping device for an oil pump according to claim 1, characterized in that: The bottom of the scraper plate (3) is provided with a mounting plate (8), which is detachably connected to the oil squeezing plate (1) by at least two connecting screws (9).

9. The oil scraping device for an oil pump according to claim 8, characterized in that: The installation position of the elastomer (4) is offset from the center plane of the extension direction of the oil extrusion plate (1).

10. The oil scraping device for an oil pump according to claim 1, characterized in that: The scraper (3) is integrally formed or welded onto the extrusion plate (1).

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