Precise mounting and positioning boss for oil pump

Abstract

The utility model provides a precise oil pump mounting and positioning boss, and belongs to the technical field of oil pump mounting and positioning bosses. Comprising a pump body; the rotor cavity hole is formed in the surface of the pump body; and the sealing sheet hole is formed in the front side of the inner wall of the rotor cavity hole. The first sealing piece and the third sealing piece are made of high-strength metal materials, large pressure can be borne, structural support is provided for the whole sealing pieces, excessive deformation under pressing rivet pressure is prevented, the reinforcing ribs in the first sealing piece can enable pressure to be more evenly dispersed on the sealing pieces, the second sealing piece in the middle is made of rubber or plastic materials, and the sealing pieces are not prone to deformation. The flexibility can absorb part of energy and buffer pressure to a certain extent, so that the overall deformation degree of the sealing sheet is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of oil pump installation positioning bosses, in particular to an oil pump precise installation positioning boss. Background Art

[0002] The oil pump is a pump that supplies oil to the air-conditioning compressor. There are two types of pump installation: floating and fixed. The fixed installation involves a positioning boss. During installation and positioning, the rotor drive shaft (the rotor drive shaft is inserted into the rotor drive shaft hole of the inner rotor) needs to be coaxial with the installation positioning boss of the pump body and perpendicular to the installation positioning surface of the pump body, and very high precision is required.

[0003] Referring to a Chinese utility model patent for an oil pump precision installation positioning boss, the patent publication number is: CN218816948U, including a pump body, the surface of which is provided with a rotor cavity hole, and the utility model relates to the technical field of oil pump installation positioning bosses for air-conditioning compressors. The oil pump precision installation positioning boss is installed by placing the outer rotor into the rotor cavity hole, and then the inner rotor is embedded into the outer rotor through concave tooth meshing, and finally the sealing piece is placed on the surface of the inner rotor, and the convex point on the top of the sealing piece is aligned with the card slot, and the sealing piece is installed into the sealing piece hole of the pump body, and the pump body of the pump body is squeezed and deformed by riveting to rivet the sealing piece, at this time, the effect of assembling it is achieved, and the outer circle of the installation positioning boss corresponding to the riveting point will be squeezed and deformed at the same time, and by setting a flat position at the corresponding riveting point on the surface of the outer circle of the installation positioning boss, the outer circle of the installation positioning boss can be eliminated from the out-of-round caused by the compression and deformation of the riveting, so as to achieve the effect of ensuring precise positioning.

[0004] When the above-mentioned device is riveting, the pump body is squeezed and deformed to rivet the sealing piece. The huge pressure may cause the shape of the sealing piece itself to change. The sealing piece may have irregular deformations such as local depression, protrusion or twisting, which makes it impossible for the sealing piece to fit tightly with surrounding parts (such as the inner rotor and the wall of the pump body sealing piece hole), thereby generating gaps, destroying the sealing performance and causing oil leakage. Therefore, the present application provides a precise installation positioning boss for an oil pump to meet the needs. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide an oil pump accurate installation positioning boss to solve the problem of oil leakage caused by deformation of the sealing sheet during riveting.

[0006] In order to solve the above technical problems, the utility model provides the following technical solutions.

[0007] A precise installation and positioning boss for an oil pump comprises: a pump body; a rotor cavity hole, which is opened on the surface of the pump body; a sealing plate hole, which is opened on the front side of the inner wall of the rotor cavity hole; a sealing plate body, which is arranged in the sealing plate hole, and the sealing plate body comprises a first sealing plate, a second sealing plate and a third sealing plate, the second sealing plate is arranged between the first sealing plate and the third sealing plate, and the second sealing plate is hollow; a plurality of reinforcing ribs, which are arranged in the first sealing plate; and a plurality of elastic strips, which are arranged in the second sealing plate.

[0008] The reinforcing ribs are distributed in a radial or grid shape.

[0009] The elastic strips are distributed in a cross-shaped manner, and the thickness of the elastic strips at the cross-shaped centers is smaller than the thickness at the non-cross-shaped parts.

[0010] The thickness of the first sealing sheet is greater than the thickness of the second sealing sheet or the third sealing sheet.

[0011] The edge of the sealing sheet body is made of elastic rubber material.

[0012] It also includes: an annular sealing groove, which is arranged on the inner wall of the sealing hole; the edge of the sealing body is embedded in the annular sealing groove to form a seal.

[0013] The annular sealing groove is filled with sealant or lubricating oil.

[0014] It also includes: an eccentric mounting positioning boss, which is arranged on the pump body; and a plurality of riveting points, which are arranged on the eccentric mounting positioning boss.

[0015] The first sealing sheet and the third sealing sheet are both made of high-strength metal material.

[0016] The second sealing sheet is made of rubber or plastic.

[0017] Compared with the prior art, the utility model has at least the following beneficial effects.

[0018] In the above scheme, the first sealing piece and the third sealing piece are made of high-strength metal materials, which can withstand greater pressure and provide structural support for the entire sealing piece to prevent excessive deformation under riveting pressure. The reinforcing ribs in the first sealing piece can disperse the pressure more evenly on the sealing piece, and the second sealing piece in the middle is made of rubber or plastic material, whose flexibility can absorb part of the energy and buffer the pressure to a certain extent, thereby reducing the overall deformation of the sealing piece.

[0019] By providing an annular sealing groove, when the sealing sheet body is squeezed and deformed, the sealant or lubricating oil in the annular sealing groove will be squeezed to better fill the gap between the sealing sheet body and the annular sealing groove, forming a more effective seal to prevent oil leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 Schematic diagram of the positioning boss for precise installation of the oil pump.

[0021] Figure 2 Schematic diagram of the rotor cavity structure.

[0022] Figure 3 It is a schematic diagram of the local structure of the annular sealing groove.

[0023] Figure 4 Schematic diagram of the cover body structure.

[0024] Figure 5 Schematic diagram of the reinforcement structure.

[0025] Figure 6 Schematic diagram of the elastic strip structure.

[0026] [Reference Signs]

[0027] 1. Pump body; 2. Eccentric mounting positioning boss; 3. Sealing plate body; 4. Riveting point; 5. Sealing plate hole; 6. Annular sealing groove; 7. Rotor cavity hole; 31. First sealing plate; 32. Third sealing plate; 33. Second sealing plate; 34. Reinforcing ribs; 35. Elastic strip.

[0028] As shown in the figure, in order to clearly implement the structure of the embodiment of the utility model, specific structures and devices are marked in the figure, but this is only for illustrative purposes and is not intended to limit the utility model to the specific structure, device and environment. According to specific needs, ordinary technicians in this field can adjust or modify these devices and environments, and the adjustments or modifications made are still included in the scope of the attached claims. DETAILED DESCRIPTION

[0029] The following is a detailed description of an oil pump precision installation positioning boss provided by the utility model in combination with the accompanying drawings and specific embodiments. At the same time, it is explained here that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and those skilled in the art may also adopt other alternative methods to implement some known technologies; and the accompanying drawings are only for a more specific description of the embodiments, and are not intended to specifically limit the utility model.

[0030] like Figure 1 - Figure 6As shown, an embodiment of the utility model provides an oil pump precise installation positioning boss, including: a pump body 1; a rotor cavity hole 7, which is opened on the surface of the pump body 1; a sealing hole 5, which is opened on the front side of the inner wall of the rotor cavity hole 7; a sealing body 3, which is arranged in the sealing hole 5, and the sealing body 3 includes a first sealing sheet 31, a second sealing sheet 33 and a third sealing sheet 32, the second sealing sheet 33 is arranged between the first sealing sheet 31 and the third sealing sheet 32, and the second sealing sheet 33 is hollow; a plurality of reinforcing ribs 34, which are arranged in the first sealing sheet 31; and a plurality of elastic strips 35, which are arranged in the second sealing sheet 33.

[0031] By setting the sealing sheet body 3, the thickness of the sealing sheet body 3 gradually becomes thinner from the center to the edge, so that the pressure can be evenly transmitted from the center to the surroundings. During the riveting process, the sealing sheet body 3 can bear the pressure evenly as a whole, avoiding deformation caused by excessive local pressure, maintaining the shape of the sealing sheet, and ensuring the sealing performance.

[0032] The reinforcing ribs 34 are distributed in a radial or grid shape. When the pump body 1 applies pressure to the sealing plate body 3 during the riveting process, the radial reinforcing ribs 34 can evenly disperse and transmit the pressure from the center to the surroundings like the spokes of a wheel, which can avoid the pressure from being concentrated at a certain point or a certain area, making the pressure on the sealing plate body 3 as a whole more uniform, thereby reducing the possibility of excessive deformation or even damage due to excessive pressure in a certain area; when the reinforcing ribs 34 are in a grid shape, multiple small force-bearing units are formed, and each grid unit can independently bear and disperse a part of the pressure, further improving the effect of pressure dispersion. At the same time, the grid structure can also increase the strength of the sealing plate body 3 in different directions, so that it can better resist pressure deformation in all directions. For example, under the action of lateral and longitudinal pressure, the grid-shaped reinforcing ribs 34 can effectively disperse the pressure to the entire sealing plate body 3, enhancing its overall pressure resistance.

[0033] The elastic strips 35 are cross-distributed, and the thickness of the cross-center of the elastic strips 35 is less than the thickness of the non-cross-center. By providing the elastic strips 35, during the riveting process, when the pressure from the first sealing sheet 31 is transmitted to the second sealing sheet 33, the cross-distribution of the elastic strips 35 enables the pressure to be dispersed and buffered at multiple intersections. Since the thickness at the intersection center is smaller, it is relatively easier to elastically deform, and can preferentially absorb the pressure, thereby avoiding excessive accumulation of pressure in local areas, and preventing the second sealing sheet 33 from being excessively deformed or damaged in these areas.

[0034] The thickness of the first sealing sheet 31 is greater than that of the second sealing sheet 33 or the third sealing sheet 32. During the riveting process, the pressure applied by the pump body 1 first acts on the first sealing sheet 31. With its greater thickness, it can withstand greater pressure without being easily deformed. Under the pressure, the first sealing sheet 31 provides rigid support, and the second sealing sheet 33 buffers the pressure through elastic deformation. The two cooperate with each other, so that the sealing sheet body 3 can withstand greater pressure while maintaining a certain degree of elasticity and sealing, achieving a combination of rigidity and flexibility.

[0035] The edge of the sealing body 3 is made of elastic rubber material. During the riveting process, the elastic rubber at the edge of the sealing body 3 will deform to fill the edge of the sealing hole 5 and the small gaps that may exist between other adjacent components (such as the inner rotor, pump body 1, etc.). When the oil pump is affected by temperature changes, vibrations and other factors during operation, the matching relationship between the components may change slightly. The elastic rubber edge can adapt to these changes and always maintain close contact with the surrounding components to maintain a sealed state.

[0036] It also includes: an annular sealing groove 6, which is arranged on the inner wall of the sealing hole 5; the edge of the sealing body 3 is embedded in the annular sealing groove 6, and cooperates to form a seal. The edge of the sealing body 3 is embedded in the annular sealing groove 6, which constructs a physical barrier to effectively prevent the flow of oil between the sealing body 3 and the inner wall of the sealing hole 5. The embedded design makes the sealing path longer and more complicated. The oil needs to bypass multiple contact points between the edge of the sealing body 3 and the annular sealing groove 6 before it can leak, which greatly increases the difficulty of leakage, thereby improving the reliability of the seal.

[0037] The annular sealing groove 6 is filled with sealant or lubricating oil. During the operation of the oil pump, due to temperature changes, pressure fluctuations, and wear of components, the sealing plate body 3 and the annular sealing groove 6 will deform to a certain extent. The sealant or lubricating oil has a certain degree of flexibility and fluidity, and can flow and deform with the deformation of the components, always maintaining the filling and sealing effect of the sealing part, adapting to the dynamically changing sealing requirements, and thus maintaining a good sealing effect.

[0038] The pump body 1 also includes an eccentrically mounted positioning boss 2, which is arranged on the pump body 1; and a plurality of riveting points 4, which are arranged on the eccentrically mounted positioning boss 2. The plurality of riveting points 4 are arranged in a ring shape, and during the riveting process, pressure is applied to the riveting points 4 to deform the pump body 1, thereby firmly riveting the sealing sheet body 3 to the pump body 1.

[0039] The first sealing sheet 31 and the third sealing sheet 32 ​​are both made of high-strength metal. During the continuous operation of the oil pump, the sealing sheet body 3 will experience repeated pressure changes and vibrations. High-strength metal materials have good fatigue resistance and can maintain structural integrity under long-term cyclic stress, reducing the risk of component failure caused by the generation and expansion of fatigue cracks.

[0040] The second sealing piece 33 is made of rubber or plastic. During the riveting process, when the pressure from the pump body 1 is transmitted to the second sealing piece 33 through the first sealing piece 31, the flexibility of the rubber or plastic material enables it to undergo elastic deformation, which can effectively buffer the pressure; when the oil pump is running, the rotation of the rotor and the flow of the oil will generate vibrations, and the second sealing piece 33 made of rubber or plastic can absorb these vibration energies well and play a role in shock absorption.

[0041] The technical solution provided by the utility model is that during the riveting process, when the pump body 1 is squeezed and deformed to rivet the sealing sheet body 3, the reinforcing ribs 34 in the first sealing sheet 31 will bear and transmit a part of the pressure transmitted from the pump body 1. The pressure is transmitted along the direction of the reinforcing ribs 34, so that the second sealing sheet 33 is deformed by the pressure from the first sealing sheet 31, and the elastic strip 35 inside the second sealing sheet 33 absorbs part of the pressure through its own elastic deformation, thereby reducing local deformation and maintaining the overall flatness of the sealing sheet. At the same time, after being squeezed and deformed, the edge of the sealing sheet body 3 will be slightly deformed and fill the tiny gap at the edge of the sealing sheet hole 5, further enhancing the sealing effect. In addition, the deformation of the sealing sheet body 3 makes it fit more closely with the annular sealing groove 6. Through the extrusion of the sealing sheet body 3, the sealant or lubricating oil in the annular sealing groove 6 will be better filled into the gap between the two, thereby forming a more effective seal.

[0042] The present invention covers any substitution, modification, equivalent method and scheme made on the essence and scope of the present invention. In order to make the public have a thorough understanding of the present invention, specific details are described in detail in the above preferred embodiments of the present invention, and those skilled in the art can fully understand the present invention without the description of these details. In addition, in order to avoid unnecessary confusion about the essence of the present invention, well-known methods, processes, procedures, components and circuits are not described in detail.

[0043] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A precise installation and positioning boss for an oil pump, characterized in that: include: Pump body (1); A rotor cavity hole (7) is formed on the surface of the pump body (1); A sealing hole (5) is formed on the front side of the inner wall of the rotor cavity hole (7); A sealing sheet body (3) is arranged in the sealing sheet hole (5), the sealing sheet body (3) comprising a first sealing sheet (31), a second sealing sheet (33) and a third sealing sheet (32), the second sealing sheet (33) being arranged between the first sealing sheet (31) and the third sealing sheet (32), and the second sealing sheet (33) being hollow; A plurality of reinforcing ribs (34) arranged in the first sealing sheet (31); A plurality of elastic strips (35) are arranged inside the second sealing sheet (33).

2. The oil pump precision installation positioning boss according to claim 1, characterized in that: The reinforcing ribs (34) are distributed in a radial or grid-like manner.

3. The oil pump precision installation positioning boss according to claim 1, characterized in that: The elastic strips (35) are distributed in a cross-shaped manner, and the thickness of the elastic strips (35) at the cross-shaped center is smaller than the thickness at the non-cross-shaped portion.

4. The oil pump precision installation positioning boss according to claim 1, characterized in that: The thickness of the first sealing sheet (31) is greater than the thickness of the second sealing sheet (33) or the third sealing sheet (32).

5. The oil pump precision installation positioning boss according to claim 1, characterized in that: The edge of the sealing sheet body (3) is made of elastic rubber material.

6. The oil pump precision installation positioning boss according to claim 1, characterized in that: Also includes: An annular sealing groove (6) is arranged on the inner wall of the sealing hole (5); The edge of the sealing sheet body (3) is embedded in the annular sealing groove (6) to form a seal.

7. The oil pump precise installation positioning boss according to claim 6, characterized in that: The annular sealing groove (6) is filled with sealing glue or lubricating oil.

8. The oil pump precision installation positioning boss according to claim 1, characterized in that include: An eccentrically mounted positioning boss (2) is arranged on the pump body (1); A plurality of riveting points (4) are arranged on the eccentric mounting positioning boss (2).

9. The oil pump precision installation positioning boss according to claim 1, characterized in that: The first sealing sheet (31) and the third sealing sheet (32) are both made of high-strength metal material.

10. The oil pump precision installation positioning boss according to claim 1, characterized in that: The second sealing sheet (33) is made of rubber or plastic material.

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