Oil pump housing with good sealing effect

Abstract

The present invention relates to the technical field of oil pump shells, and discloses an oil pump shell with good sealing effect, comprising: an oil pump lower shell and an oil pump upper shell, the top of the oil pump lower shell is provided with a lower shell flange, the top surface of the lower shell flange is provided with a flange groove in the center, the outer wall of the lower half of the oil pump upper shell is provided with an upper shell flange, the upper shell flange is installed in the flange groove by screws, the bottom of the oil pump upper shell is provided with an inner sleeve below the upper shell flange, the outer wall of the inner sleeve is provided with a sealing ring, and fixing studs are provided on both sides of the top of the lower shell flange. The present invention fixes a pressure block above a fixing ring by a locking nut, applies pressure to the pressure block by the locking nut, and arranges a centering disc and a rubber seat between the locking nut and the pressure block. When the oil pump shell is subjected to vibration, the rubber seat and the centering disc can be tightly pressed against the bottom of the locking nut by their own elasticity to prevent it from loosening, thereby improving the sealing effect.

Description

Technical Field

[0001] The invention relates to the technical field of oil pump casings, in particular to an oil pump casing with good sealing effect. Background Art

[0002] The oil pump is an important fluid conveying equipment, widely used in industries such as industry, agriculture and automobiles. The oil pump housing is the outer shell of the oil pump, which mainly protects the internal parts and supports the entire structure. The oil pump housing is generally made of metal such as aluminum or other alloys, which have good mechanical strength and corrosion resistance.

[0003] The seal is critical to the oil pump housing as it prevents fluid leakage and external contaminants from entering, ensuring the efficient operation of the oil pump system.

[0004] Most existing oil pumps are assembled with an upper shell and a lower shell, which are screwed in and installed by multiple bolts. The sealing performance of this bolt connection method mainly depends on the tightening force of the bolts. If the tightening force of the bolts is too large or too small, the sealing performance may be reduced. Excessive tightening force may cause the bolts to stretch excessively or even break; too small tightening force may cause the joints to be loose and prone to leakage. When the oil pump is in use, it will inevitably be subject to vibration. These vibrations may come from the external environment, the rotation of the impeller itself, and the pulsation of the oil pressure. These vibrations can easily cause the upper and lower shell connections of the oil pump, such as bolts, to loosen, resulting in reduced sealing of the oil pump connection. In addition, impurity particles in the oil may enter between the sealing surfaces during the operation of the oil pump, which will cause the sealing surfaces to wear more severely. For this purpose, an oil pump shell with good sealing effect is provided. Summary of the invention

[0005] The object of the present invention is to provide an oil pump housing with good sealing effect to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical scheme: an oil pump shell with good sealing effect, comprising: an oil pump lower shell and an oil pump upper shell, the top of the oil pump lower shell is provided with a lower shell flange, the top surface of the lower shell flange is provided with a flange groove in the center, the outer wall of the lower half of the oil pump upper shell is provided with an upper shell flange, the upper shell flange is installed in the flange groove by screws, the bottom of the oil pump upper shell is provided with an inner sleeve below the upper shell flange, the outer wall of the inner sleeve is provided with a sealing ring, an oil inlet pipe is provided in the center of the bottom end of the inner sleeve, fixing studs are provided on both sides of the top of the lower shell flange, the outer wall of the oil pump upper shell is provided with a fixing ring above the upper shell flange, a pressure block is provided above the fixing ring, the top of the fixing stud passes through both sides of the pressure block, the top of the pressure block is provided with a centering disc on the outside of the fixing stud, and a locking nut is provided on the outside of the fixing stud above the centering disc.

[0007] As a further explanation of the present invention, a rubber seat is provided below the centering socket, a through hole is opened in the center of the rubber seat, the rubber seat is sleeved on the outside of the fixing stud, and a gasket is provided between the locking nut and the centering socket.

[0008] As a further illustration of the present invention, the outer diameter of the inner sleeve is the same as the inner diameter of the lower housing of the oil pump, and a sealing gasket is provided between the upper housing flange and the inner wall of the bottom of the flange groove.

[0009] As a further explanation of the present invention, an oil inlet is provided at the bottom of the oil pump lower shell, and a filter screen is provided at the bottom of the oil pump lower shell located inside the oil inlet.

[0010] As a further explanation of the present invention, a bottom limit ring is provided at the bottom of the oil pump lower shell, the filter screen cylinder is slidably arranged at the bottom of the oil pump lower shell, an upper limit ring is provided at the top of the filter screen cylinder, and a lower limit plate is provided at the bottom of the filter screen cylinder.

[0011] As a further description of the present invention, an annular brush is provided at the bottom end of the bottom limiting ring, bristles are provided on the inner side of the annular brush, and the bristles on the inner side of the annular brush are in contact with the outer wall of the filter screen cylinder.

[0012] As a further explanation of the present invention, a return spring is provided at the bottom end of the inner sleeve, the return spring is arranged on the outside of the oil inlet pipe, the top of the return spring is fixedly connected to the bottom surface of the inner sleeve, and the bottom end of the return spring is fixedly connected to the inner wall of the bottom wall of the filter cylinder.

[0013] As a further description of the present invention, an inner overflow pipe is provided on the inner wall of the bottom of the filter screen cylinder, the top surface height of the inner overflow pipe is higher than the mesh height on the filter screen cylinder, and the inner overflow pipe is located outside the reset spring.

[0014] As a further explanation of the present invention, an oil outlet is provided on one side of the upper shell of the oil pump, a central through hole is opened in the center of the pressure block, the diameter of the central through hole is the same as the inner diameter of the fixing ring, and through holes for fixing studs to pass through are opened on both sides of the pressure block.

[0015] As a further illustration of the present invention, mounting through holes are provided on both sides of the lower shell flange.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The present invention realizes that when the oil pump lower housing and the oil pump upper housing are connected, the inner sleeve on the oil pump upper housing is inserted into the lower housing of the oil pump, and the first sealing is realized by the sealing ring. The sealing gasket is arranged between the upper housing flange and the flange groove, and the upper housing flange is fixed to the flange groove by screws to realize the second connection sealing. In addition, fixing studs are arranged on both sides of the lower housing flange, and the pressing block is fixed above the fixing ring by a locking nut. The locking nut is used to apply pressure to the pressing block, and the upper housing of the oil pump is tightly pressed against the upper housing of the oil pump by the pressing block to ensure a tight connection. In addition, a centering disc and a rubber seat are arranged between the locking nut and the pressing block. The rubber seat and the centering disc have a certain elasticity. When the oil pump housing is vibrated, the rubber seat and the centering disc can be tightly pressed under the locking nut by their own elasticity to prevent it from loosening, thereby further improving the sealing effect.

[0018] When the oil pump housing is in use, oil enters from the filter screen cylinder at the bottom. After the oil enters the filter screen cylinder, it is separated by the internal overflow pipe. The oil can be further precipitated between the internal overflow pipe and the filter screen cylinder. The upper clear oil overflows over the top of the internal overflow pipe and enters the internal overflow pipe. The oil is transported from the oil inlet pipe through the mechanism inside the oil pump housing. The cooperation of the filter screen cylinder and the internal overflow pipe ensures that the oil is clean and prevents impurities in the oil from entering between the sealing surfaces during the operation of the oil pump. In addition, due to pressure pulses during the oil transportation process, the oil transportation pressure will fluctuate within a range. When the oil delivery pressure increases, it will drive the filter cylinder to move toward the inside of the lower shell of the oil pump. At this time, the filter cylinder located on the outside of the lower shell of the oil pump becomes shorter, the actual oil inlet holes become fewer, and the oil intake will decrease. At this time, the return spring is compressed. Conversely, when the oil delivery pressure decreases, under the elastic force of the return spring, the distance that the filter cylinder extends out of the lower shell of the oil pump becomes longer, the actual oil inlet holes increase, and the oil intake increases, ensuring that the oil intake is stable under pressure pulses. At the same time, the outer wall of the filter cylinder can be cleaned by the movement of the filter cylinder relative to the annular brush, thereby improving the cleanliness of the filter cylinder, preventing it from being blocked, and increasing its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is an exploded view of an oil pump housing with good sealing effect according to the present invention;

[0020] Figure 2 This is a schematic diagram of a rubber seat connection structure of an oil pump housing with good sealing effect according to the present invention;

[0021] Figure 3 A three-dimensional diagram of an oil pump housing with good sealing effect according to the present invention;

[0022] Figure 4 This is a main cross-sectional view of an oil pump housing with good sealing effect according to the present invention;

[0023] Figure 5 This is a front view of an oil pump housing with good sealing effect according to the present invention;

[0024] Figure 6 This is a left side view of an oil pump housing with good sealing effect according to the present invention;

[0025] Figure 7 This is a right side view of an oil pump housing with good sealing effect according to the present invention;

[0026] Figure 8 A top view of an oil pump housing with good sealing effect according to the present invention;

[0027] Fig. 9 It is a schematic diagram of the inner overflow pipe connection structure of an oil pump housing with good sealing effect according to the present invention;

[0028] Fig.10 This is a three-dimensional diagram from another perspective of an oil pump housing with good sealing effect according to the present invention.

[0029] In the figure: 1. Oil pump lower housing; 2. Lower housing flange; 3. Oil pump upper housing; 4. Upper housing flange; 5. Retaining ring; 6. Pressure block; 7. Retaining stud; 8. Flange groove; 9. Inner sleeve; 10. Sealing ring; 11. Oil inlet pipe; 12. Return spring; 13. Filter cylinder; 14. Upper limit ring; 15. Lower limit plate; 16. Inner overflow pipe; 17. Bottom limit ring; 18. Annular brush; 19. Rubber seat; 20. Centering disc; 21. Gasket; 22. Locking nut. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0031] Example 1: Please refer to Figure 1-Figure 2The present invention provides a technical solution: an oil pump housing with good sealing effect, comprising: an oil pump lower housing 1 and an oil pump upper housing 3, a lower housing flange 2 is provided on the top of the oil pump lower housing 1, a flange groove 8 is provided in the center of the top surface of the lower housing flange 2, an upper housing flange 4 is provided on the outer wall of the lower half of the oil pump upper housing 3, the upper housing flange 4 is installed in the flange groove 8 by screws, an inner sleeve 9 is provided at the bottom of the oil pump upper housing 3 below the upper housing flange 4, a sealing ring 10 is provided on the outer wall of the inner sleeve 9, an oil inlet pipe 11 is provided at the center of the bottom end of the inner sleeve 9, fixing studs 7 are provided on both sides of the top of the lower housing flange 2, a fixing ring 5 is provided on the outer wall of the oil pump upper housing 3 above the upper housing flange 4, a pressure block 6 is provided above the fixing ring 5, the top of the fixing stud 7 passes through both sides of the pressure block 6, a centering disc 20 is provided on the top of the pressure block 6 located outside the fixing stud 7, and a locking nut 22 is provided on the outside of the fixing stud 7 above the centering disc 20. A rubber seat 19 is provided below the centering socket 20, a through hole is provided in the center of the rubber seat 19, the rubber seat 19 is sleeved on the outside of the fixing stud 7, and a gasket 21 is provided between the locking nut 22 and the centering socket 20. Fixing studs 7 are provided on both sides of the lower housing flange 2, and the pressure block 6 is fixed above the fixing ring 5 through the locking nut 22, and pressure is applied to the pressure block 6 through the locking nut 22, and the oil pump upper housing 3 is tightly pressed above the oil pump lower housing 1 through the pressure block 6 to ensure a tight connection, and the centering socket 20 and the rubber seat 19 are provided between the locking nut 22 and the pressure block 6, and both the rubber seat 19 and the centering socket 20 have a certain elasticity. When the oil pump housing is vibrated, the rubber seat 19 and the centering socket 20 can be tightly pressed under the locking nut 22 through their own elasticity to prevent it from loosening, thereby further improving the sealing effect.

[0032] The outer diameter of the inner sleeve 9 is the same as the inner diameter of the oil pump lower housing 1, and a sealing gasket is provided between the upper housing flange 4 and the inner wall at the bottom of the flange groove 8. When the oil pump lower housing 1 and the oil pump upper housing 3 are connected, the inner sleeve 9 on the oil pump upper housing 3 is inserted into the oil pump lower housing 1, and the first seal is achieved through the sealing ring 10. The second connection seal is achieved by providing a sealing gasket between the upper housing flange 4 and the flange groove 8, and fixing the upper housing flange 4 inside the flange groove 8 by screws.

[0033] Example 2: Please refer to Figure 1-Figure 3The present invention provides a technical solution: an oil pump housing with good sealing effect, comprising: an oil pump lower housing 1 and an oil pump upper housing 3, a lower housing flange 2 is provided on the top of the oil pump lower housing 1, a flange groove 8 is provided in the center of the top surface of the lower housing flange 2, an upper housing flange 4 is provided on the outer wall of the lower half of the oil pump upper housing 3, the upper housing flange 4 is installed in the flange groove 8 by screws, an inner sleeve 9 is provided at the bottom of the oil pump upper housing 3 below the upper housing flange 4, a sealing ring 10 is provided on the outer wall of the inner sleeve 9, an oil inlet pipe 11 is provided at the center of the bottom end of the inner sleeve 9, fixing studs 7 are provided on both sides of the top of the lower housing flange 2, a fixing ring 5 is provided on the outer wall of the oil pump upper housing 3 above the upper housing flange 4, a pressure block 6 is provided above the fixing ring 5, the top of the fixing stud 7 passes through both sides of the pressure block 6, a centering disc 20 is provided on the top of the pressure block 6 located outside the fixing stud 7, and a locking nut 22 is provided on the outside of the fixing stud 7 above the centering disc 20. A rubber seat 19 is provided below the centering socket 20, a through hole is provided in the center of the rubber seat 19, the rubber seat 19 is sleeved on the outside of the fixing stud 7, and a gasket 21 is provided between the locking nut 22 and the centering socket 20. Fixing studs 7 are provided on both sides of the lower housing flange 2, and the pressure block 6 is fixed above the fixing ring 5 through the locking nut 22, and pressure is applied to the pressure block 6 through the locking nut 22, and the oil pump upper housing 3 is tightly pressed above the oil pump lower housing 1 through the pressure block 6 to ensure a tight connection, and the centering socket 20 and the rubber seat 19 are provided between the locking nut 22 and the pressure block 6, and both the rubber seat 19 and the centering socket 20 have a certain elasticity. When the oil pump housing is vibrated, the rubber seat 19 and the centering socket 20 can be tightly pressed under the locking nut 22 through their own elasticity to prevent it from loosening, thereby further improving the sealing effect.

[0034] The outer diameter of the inner sleeve 9 is the same as the inner diameter of the oil pump lower housing 1, and a sealing gasket is provided between the upper housing flange 4 and the inner wall at the bottom of the flange groove 8. When the oil pump lower housing 1 and the oil pump upper housing 3 are connected, the inner sleeve 9 on the oil pump upper housing 3 is inserted into the oil pump lower housing 1, and the first seal is achieved through the sealing ring 10. The second connection seal is achieved by providing a sealing gasket between the upper housing flange 4 and the flange groove 8, and fixing the upper housing flange 4 inside the flange groove 8 by screws.

[0035] In this embodiment, a return spring 12 is provided at the bottom end of the inner sleeve 9. The return spring 12 is arranged on the outside of the oil inlet pipe 11. The top of the return spring 12 is fixedly connected to the bottom surface of the inner sleeve 9, and the bottom end of the return spring 12 is fixedly connected to the inner wall of the bottom wall of the filter screen cylinder 13. During the oil delivery process, due to pressure pulses, the oil delivery pressure will fluctuate within a range. When the oil delivery pressure increases, the filter screen cylinder 13 will be driven to move toward the inside of the oil pump lower shell 1. At this time, the filter screen cylinder 13 located on the outside of the oil pump lower shell 1 becomes shorter, the actual oil inlet holes become fewer, and the oil intake will decrease. At this time, the return spring 12 is compressed. Conversely, when the oil delivery pressure decreases, under the elastic force of the return spring 12, the distance that the filter screen cylinder 13 extends out of the oil pump lower shell 1 becomes longer, the actual oil inlet holes increase, and the oil intake increases, thereby ensuring that the oil intake is stable under the pressure pulse. At the same time, the outer wall of the filter screen cylinder 13 can be cleaned by moving the filter screen cylinder 13 relative to the annular brush 18, thereby improving the cleanliness of the filter screen cylinder 13, preventing it from being blocked, and increasing its service life.

[0036] Example 3: Please refer to Figure 1-Figure 10 The present invention provides a technical solution: an oil pump housing with good sealing effect, comprising: an oil pump lower housing 1 and an oil pump upper housing 3, a lower housing flange 2 is provided on the top of the oil pump lower housing 1, a flange groove 8 is provided in the center of the top surface of the lower housing flange 2, an upper housing flange 4 is provided on the outer wall of the lower half of the oil pump upper housing 3, the upper housing flange 4 is installed in the flange groove 8 by screws, an inner sleeve 9 is provided at the bottom of the oil pump upper housing 3 below the upper housing flange 4, a sealing ring 10 is provided on the outer wall of the inner sleeve 9, an oil inlet pipe 11 is provided at the center of the bottom end of the inner sleeve 9, fixing studs 7 are provided on both sides of the top of the lower housing flange 2, a fixing ring 5 is provided on the outer wall of the oil pump upper housing 3 above the upper housing flange 4, a pressure block 6 is provided above the fixing ring 5, the top of the fixing stud 7 passes through both sides of the pressure block 6, a centering disc 20 is provided on the top of the pressure block 6 located outside the fixing stud 7, and a locking nut 22 is provided on the outside of the fixing stud 7 above the centering disc 20. A rubber seat 19 is provided below the centering socket 20, a through hole is provided in the center of the rubber seat 19, the rubber seat 19 is sleeved on the outside of the fixing stud 7, and a gasket 21 is provided between the locking nut 22 and the centering socket 20. Fixing studs 7 are provided on both sides of the lower housing flange 2, and the pressure block 6 is fixed above the fixing ring 5 through the locking nut 22, and pressure is applied to the pressure block 6 through the locking nut 22, and the oil pump upper housing 3 is tightly pressed above the oil pump lower housing 1 through the pressure block 6 to ensure a tight connection, and the centering socket 20 and the rubber seat 19 are provided between the locking nut 22 and the pressure block 6, and both the rubber seat 19 and the centering socket 20 have a certain elasticity. When the oil pump housing is vibrated, the rubber seat 19 and the centering socket 20 can be tightly pressed under the locking nut 22 through their own elasticity to prevent it from loosening, thereby further improving the sealing effect.

[0037] The outer diameter of the inner sleeve 9 is the same as the inner diameter of the oil pump lower housing 1, and a sealing gasket is provided between the upper housing flange 4 and the inner wall at the bottom of the flange groove 8. When the oil pump lower housing 1 and the oil pump upper housing 3 are connected, the inner sleeve 9 on the oil pump upper housing 3 is inserted into the oil pump lower housing 1, and the first seal is achieved through the sealing ring 10. The second connection seal is achieved by providing a sealing gasket between the upper housing flange 4 and the flange groove 8, and fixing the upper housing flange 4 inside the flange groove 8 by screws.

[0038] In this embodiment, an oil inlet is provided at the bottom of the oil pump lower shell 1, and a filter mesh cylinder 13 is provided at the bottom of the oil pump lower shell 1 located inside the oil inlet. The oil inlet of the oil pump is filtered through the filter mesh cylinder 13 to prevent the oil pump from inhaling oil containing a large amount of impurities, and to prevent these impurities from damaging the sealing components of the oil pump and affecting the overall performance and efficiency of the oil pump.

[0039] A bottom limit ring 17 is provided at the bottom of the oil pump lower housing 1, and the filter screen cylinder 13 is slidably arranged at the bottom of the oil pump lower housing 1. An upper limit ring 14 is provided at the top of the filter screen cylinder 13, and a lower limit plate 15 is provided at the bottom of the filter screen cylinder 13. The filter screen cylinder 13 is limited to the position inside the oil pump lower housing 1 through the contact between the bottom limit ring 17 and the upper limit ring 14, and the filter screen cylinder 13 is limited to the position inside the oil pump lower housing 1 through the contact between the bottom limit ring 17 and the lower limit plate 15.

[0040] An annular brush 18 is provided at the bottom end of the bottom limit ring 17, and bristles are provided inside the annular brush 18. The bristles inside the annular brush 18 are in contact with the outer wall of the filter screen cylinder 13. A return spring 12 is provided at the bottom end of the inner sleeve 9. The return spring 12 is arranged outside the oil inlet pipe 11. The top end of the return spring 12 is fixedly connected to the bottom surface of the inner sleeve 9, and the bottom end of the return spring 12 is fixedly connected to the inner wall of the bottom wall of the filter screen cylinder 13. During the oil delivery process, due to pressure pulses, the oil delivery pressure will fluctuate within a range. When the oil delivery pressure increases, the filter screen cylinder 13 will be driven to move toward the inside of the oil pump lower shell 1. At this time, the filter screen cylinder 13 located on the outside of the oil pump lower shell 1 becomes shorter, the actual oil inlet holes become fewer, and the oil intake will decrease. At this time, the return spring 12 is compressed. Conversely, when the oil delivery pressure decreases, under the elastic force of the return spring 12, the distance that the filter screen cylinder 13 extends out of the oil pump lower shell 1 becomes longer, the actual oil inlet holes increase, and the oil intake increases, thereby ensuring that the oil intake is stable under the pressure pulse. At the same time, the outer wall of the filter screen cylinder 13 can be cleaned by moving the filter screen cylinder 13 relative to the annular brush 18, thereby improving the cleanliness of the filter screen cylinder 13, preventing it from being blocked, and increasing its service life.

[0041] An inner overflow pipe 16 is provided on the inner wall at the bottom of the filter screen cylinder 13. The top surface height of the inner overflow pipe 16 is higher than the mesh height of the filter screen cylinder 13. The inner overflow pipe 16 is located outside the reset spring 12. The inner overflow pipe 16 is used for separation, and the oil can be further precipitated between the inner overflow pipe 16 and the filter screen cylinder 13. The upper layer of clear oil overflows over the top of the inner overflow pipe 16 and enters the inner overflow pipe 16. The oil is transported from the oil inlet pipe 11 through the mechanism inside the oil pump housing. At the same time, the inner overflow pipe 16 is located outside the reset spring 12 to ensure that the upper layer of clear oil contacts the spring, so as to prevent impurities in the oil from accumulating on the spring and causing the spring to fail.

[0042] An oil outlet is provided on one side of the oil pump upper housing 3 for discharging pressurized oil from the pump body. A central through hole is provided in the center of the pressure block 6, and the diameter of the central through hole is the same as the inner diameter of the fixing ring 5. Through holes for fixing studs 7 to pass through are provided on both sides of the pressure block 6. The pressure block 6 is fixed above the fixing ring 5 by a locking nut 22, and pressure is applied to the pressure block 6 by the locking nut 22. The oil pump upper housing 3 is tightly pressed against the oil pump lower housing 1 by the pressure block 6 to ensure a tight connection.

[0043] Mounting through holes are provided on both sides of the lower housing flange 2 for mounting and fixing the oil pump housing on the inner side or outer side bracket of the oil tank.

[0044] When the oil pump lower housing 1 and the oil pump upper housing 3 are connected, the inner sleeve 9 on the oil pump upper housing 3 is inserted into the lower housing 1 of the oil pump, and the first sealing is achieved by the sealing ring 10. The second connection sealing is achieved by arranging a sealing gasket between the upper housing flange 4 and the flange groove 8, and fixing the upper housing flange 4 in the flange groove 8 by screws. In addition, fixing studs 7 are arranged on both sides of the lower housing flange 2, and the pressure block 6 is fixed above the fixing ring 5 by the locking nut 22. The locking nut 22 applies pressure to the pressure block 6, and the oil pump upper housing 3 is tightly pressed above the oil pump lower housing 1 by the pressure block 6 to ensure a tight connection. In addition, a centering disc 20 and a rubber seat 19 are arranged between the locking nut 22 and the pressure block 6. The rubber seat 19 and the centering disc 20 both have a certain elasticity. When the oil pump housing is vibrated, the rubber seat 19 and the centering disc 20 can be tightly pressed under the locking nut 22 by their own elasticity to prevent it from loosening, thereby further improving the sealing effect.

[0045] When the oil pump housing is in use, oil is introduced from the filter screen cylinder 13 at the bottom. After the oil enters the filter screen cylinder 13, it is separated by the internal overflow pipe 16. The oil can be further precipitated between the internal overflow pipe 16 and the filter screen cylinder 13. The upper clear oil overflows over the top of the internal overflow pipe 16 and enters the internal overflow pipe 16. The oil is transported from the oil inlet pipe 11 through the mechanism inside the oil pump housing. The cooperation of the filter screen cylinder 13 and the internal overflow pipe 16 ensures that the oil is clean and prevents foreign particles in the oil from entering between the sealing surfaces during the operation of the oil pump. In addition, due to pressure pulses during the oil transportation process, the oil transportation pressure will fluctuate within a range. When When the oil delivery pressure increases, the filter screen cylinder 13 will be driven to move toward the inside of the oil pump lower shell 1. At this time, the filter screen cylinder 13 located on the outside of the oil pump lower shell 1 becomes shorter, the actual oil inlet holes become fewer, and the oil intake will decrease. At this time, the return spring 12 is compressed. On the contrary, when the oil delivery pressure decreases, under the elastic force of the return spring 12, the distance that the filter screen cylinder 13 extends out of the oil pump lower shell 1 becomes longer, the actual oil inlet holes increase, and the oil intake increases, which ensures that the oil intake is stable under the pressure pulse. At the same time, the outer wall of the filter screen cylinder 13 can be cleaned by the movement of the filter screen cylinder 13 relative to the annular brush 18, thereby improving the cleanliness of the filter screen cylinder 13, preventing it from being blocked, and increasing its service life.

[0046] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present invention.

Claims

1. An oil pump housing, comprising: The oil pump lower housing (1) and the oil pump upper housing (3) are characterized in that: the top of the oil pump lower housing (1) is provided with a lower housing flange (2), the center of the top surface of the lower housing flange (2) is provided with a flange groove (8), the lower half outer wall of the oil pump upper housing (3) is provided with an upper housing flange (4), the upper housing flange (4) is installed in the flange groove (8) by screws, the bottom of the oil pump upper housing (3) is provided with an inner sleeve (9) below the upper housing flange (4), the outer wall of the inner sleeve (9) is provided with a sealing ring (10), and the inner sleeve (9) is provided with a sealing ring (10). An oil inlet pipe (11) is provided at the center of the bottom end of the sleeve (9), fixing studs (7) are provided on both sides of the top of the lower housing flange (2), a fixing ring (5) is provided on the outer wall of the upper housing (3) of the oil pump located above the upper housing flange (4), a pressure block (6) is provided above the fixing ring (5), the top of the fixing stud (7) passes through both sides of the pressure block (6), a centering socket (20) is provided on the top of the pressure block (6) located outside the fixing stud (7), and a locking nut (22) is provided on the outside of the fixing stud (7) located above the centering socket (20); An oil inlet is provided at the bottom of the oil pump lower housing (1), and a filter screen cylinder (13) is provided at the bottom of the oil pump lower housing (1) and located inside the oil inlet; A bottom stop ring (17) is provided at the bottom of the oil pump lower housing (1); the filter screen cylinder (13) is slidably arranged at the bottom of the oil pump lower housing (1); an upper stop ring (14) is provided at the top of the filter screen cylinder (13); and a lower stop plate (15) is provided at the bottom of the filter screen cylinder (13).

2. The oil pump housing according to claim 1, characterized in that: A rubber seat (19) is provided below the centering socket (20), a through hole is provided in the center of the rubber seat (19), the rubber seat (19) is sleeved on the outside of the fixing stud (7), and a gasket (21) is provided between the locking nut (22) and the centering socket (20).

3. The oil pump housing according to claim 1, characterized in that: The outer diameter of the inner sleeve (9) is the same as the inner diameter of the lower housing (1) of the oil pump, and a sealing gasket is provided between the upper housing flange (4) and the bottom inner wall of the flange groove (8).

4. The oil pump housing according to claim 1, characterized in that: An annular brush (18) is provided at the bottom end of the bottom limiting ring (17), bristles are provided on the inner side of the annular brush (18), and the bristles on the inner side of the annular brush (18) are in contact with the outer wall of the filter screen cylinder (13).

5. The oil pump housing according to claim 4, characterized in that: A return spring (12) is provided at the bottom end of the inner sleeve (9), and the return spring (12) is arranged outside the oil inlet pipe (11). The top end of the return spring (12) is fixedly connected to the bottom surface of the inner sleeve (9), and the bottom end of the return spring (12) is fixedly connected to the inner wall of the bottom wall of the filter screen cylinder (13).

6. The oil pump housing according to claim 5, characterized in that: An inner overflow pipe (16) is provided on the inner wall at the bottom of the filter screen cylinder (13); the top surface height of the inner overflow pipe (16) is higher than the mesh height on the filter screen cylinder (13); and the inner overflow pipe (16) is located outside the return spring (12).

7. The oil pump housing according to claim 1, characterized in that: An oil outlet is provided on one side of the oil pump upper housing (3), a central through hole is provided in the center of the pressure block (6), the diameter of the central through hole is the same as the inner diameter of the fixing ring (5), and through holes for fixing studs (7) to pass through are provided on both sides of the pressure block (6).

8. The oil pump housing according to claim 1, characterized in that: Mounting through holes are provided on both sides of the lower shell flange (2).

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