Oil pump

Abstract

The utility model discloses an oil pump which comprises a shell, a rotating shaft arranged in the shell and a worm gear arranged on the rotating shaft, the shell comprises a protruding opening allowing the worm gear to protrude out of the shell and two through holes allowing engine oil to enter and exit, and the oil pump further comprises a base integrated with the shell and a barrel-shaped extending part split from the shell. A groove is formed in the base, internal threads are arranged on the groove wall of the groove, external threads matched with the internal threads in a threaded mode are arranged on the outer wall of the extending part, the through holes comprise the first through hole penetrating through the extending part and the second through hole formed in the groove bottom of the groove, the opening of the first through hole is opposite to the opening of the second through hole, and the extending part is detachably arranged. The oil pump can replace different extension parts according to the overall layout of the machine, so that the adaptability of the oil pump is higher. When engine oil is accumulated in the through hole, the extending part can be detached for cleaning, and cleaning is convenient.

Description

Technical Field

[0001] The utility model belongs to the technical field of oil pumps, and in particular relates to an oil pump. Background Art

[0002] The oil pump plays an important role in the lubrication system. Its function is to increase the oil pressure to a certain level before supplying the oil. The existing oil pump usually includes a housing, a rotating shaft disposed in the housing, and a worm gear disposed on the rotating shaft. The housing includes a protruding port for the worm gear to protrude from the housing and two through holes for the oil to enter and exit.

[0003] The outer wall of the housing is usually provided with an extension protruding in a direction away from the housing, and the through hole passes through the extension. The existing extension is integrally arranged with the housing, which makes it impossible to change the angle of the existing extension, so that a type of oil pump can only be adapted to a mechanical layout, and the adaptability is poor. After the oil pump has been used for a period of time, there may be oil residue at the opening of the through hole facing the inside of the housing, which affects the flow of oil and the operation of the oil pump, and the existing oil pump is not convenient for cleaning the accumulated oil. Summary of the invention

[0004] In order to overcome the deficiencies of the prior art, the utility model provides an oil pump which can adjust the oil inlet and outlet angles and facilitates cleaning of the through hole.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: an oil pump, including a housing, a rotating shaft arranged in the housing and a worm gear arranged on the rotating shaft, the housing including a protruding port for the worm gear to protrude from the housing and two through holes for the oil to enter and exit, and also including a base integrally arranged with the housing and a cylindrical extension portion separately arranged from the housing, the base is provided with a groove, the groove wall of the groove is provided with an internal thread, the outer wall of the extension portion is provided with an external thread matching the internal thread, the through hole includes a through hole 1 passing through the extension portion and a through hole 2 arranged at the bottom of the groove, and the through hole 1 and the through hole 2 are opposite to each other.

[0006] The above scheme has a simple structure and is easy to produce. The extension part can be detachably arranged, and the oil pump can replace different extension parts according to the overall layout of the machine, so that the utility model has higher adaptability. When oil accumulates in the through hole, the extension part can be removed for cleaning, which is convenient for cleaning.

[0007] As a further configuration of the utility model, a sealing gasket made of elastic material is provided between the extension portion and the bottom of the groove, a through hole three is provided in the middle of the sealing gasket, and a diameter of the through hole three is greater than or equal to that of the through hole two.

[0008] By adopting the above solution, the sealing effect of the entire oil pump is improved.

[0009] As a further configuration of the utility model, a rib is provided at the bottom of the groove, the rib is annular and surrounds the second through hole, the sealing gasket is arranged between the rib and the groove wall of the groove, and the inner diameter of the rib is equal to the aperture of the first through hole; when the extension part abuts against the rib, the extension part is deformed by the force applied by the sealing gasket.

[0010] With the above solution, the presence of the rib facilitates the placement of the sealing gasket and prevents the sealing gasket from being displaced in its own radial direction when the sealing gasket is subjected to the force applied by the extension portion, thereby ensuring the sealing effect of the sealing gasket.

[0011] As a further configuration of the utility model, at least two concentrically arranged convex rings are provided on the surface of the sealing gasket facing away from the bottom of the groove.

[0012] The above solution can improve the sealing effect of the sealing gasket and prevent the extension part from rotating to a certain extent during the use of the utility model, so that the extension part can be better fixed in the groove.

[0013] As a further configuration of the utility model, the surface of the extension portion facing the groove is a frosted surface, and the surface of the retaining edge facing the extension portion is a frosted surface.

[0014] The above solution can prevent the extension part from self-rotating to a certain extent during the use of the utility model.

[0015] As a further configuration of the utility model, the extension portion includes cone 1, cone 2 and a cylinder, the top surface diameter of cone 1 is smaller than its bottom surface area, the top surface diameter of cone 2 is smaller than its bottom surface diameter, the center lines of cone 1, cone 2 and cylinder coincide, the end surface of the cylinder away from the shell abuts against the bottom surface of cone 2, and the end surface diameter of the cylinder is smaller than the bottom surface diameter of cone 2, the top surface of cone 2 abuts against the bottom surface of cone 1, and the top surface diameter of cone 2 is smaller than the bottom surface diameter of cone 1.

[0016] The above solution is adopted to facilitate fixing of the connected pipes and achieve a better connection effect.

[0017] As a further configuration of the present invention, when the angle between the axis of through hole one and the axis of through hole two is less than 175°, the inner wall of through hole one includes an arc-shaped transition surface, and the transition surface is arranged on the side of through hole one facing through hole two.

[0018] By adopting the above solution, the engine oil can flow smoothly in the through hole.

[0019] The utility model is further described below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Attached Figure 1 It is a schematic diagram of a specific embodiment of the utility model;

[0021] Attached Figure 2 It is a cross-sectional schematic diagram of a specific embodiment of the utility model;

[0022] Attached Figure 3 For attachment Figure 2 A magnified view of part A.

[0023] Shell 1, protruding opening 11, through hole 12, through hole 121, transition surface 1211, through hole 2 122, rotating shaft 2, worm gear 3, base 4, groove 41, internal thread 411, rib 412, extension 5, external thread 51, frustum 1 52, frustum 2 53, cylinder 54, sealing gasket 6, convex ring 61. DETAILED DESCRIPTION

[0024] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] In the description of the present utility model, it should be noted that, unless otherwise specified, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicating the orientation or position relationship in the description are based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0026] The specific implementation of the present invention is as follows Figure 1-3 shown.

[0027] An oil pump comprises a housing 1, a rotating shaft 2 arranged in the housing 1 and a worm gear 3 arranged on the rotating shaft 2, and also comprises a base 4 and a cylindrical extension portion 5. The housing 1 comprises a protruding port 11 for the worm gear 3 to protrude from the housing 1 and two through holes 12 for the oil to enter and exit. The base 4 is integrally arranged with the housing 1, and the extension portion 5 is separately arranged with the housing 1. A groove 41 is arranged on the base 4, and the groove wall of the groove 41 is provided with an internal thread 411. The outer wall of the extension portion 5 is provided with an external thread 51 threadably matched with the internal thread 411. The through hole 12 comprises a through hole 121 penetrating the extension portion 5 and a through hole 2 122 arranged at the bottom of the groove 41. The through hole 121 and the through hole 2 122 are opposite to each other. In this embodiment, the through hole 121 and the through hole 2 122 have the same aperture.

[0028] This embodiment has a simple structure and is easy to produce. The extension part 5 is detachable, and the oil pump can replace different extension parts 5 according to the overall layout of the machine, making this embodiment more adaptable. When oil accumulates in the through hole 12, the extension part 5 can be removed for cleaning, which is convenient for cleaning.

[0029] A sealing gasket 6 made of elastic material is arranged between the extension portion 5 and the bottom of the groove 41, and a through hole 3 is arranged in the middle of the sealing gasket 6, and the diameter of the through hole 3 is larger than the through hole 2 122, so as to make the sealing effect of the whole oil pump better.

[0030] The groove bottom of the groove 41 is provided with a rib 412, which is annular and surrounds the second through hole 122. The sealing gasket 6 is arranged between the rib 412 and the groove wall of the groove 41, and the inner diameter of the rib 412 is equal to the aperture of the first through hole 121. When the extension 5 abuts against the rib 412, the extension 5 is deformed by the force applied by the sealing gasket 6. The existence of the rib 412 facilitates the placement of the sealing gasket 6, and prevents the sealing gasket 6 from being displaced in its own radial direction when the force applied by the extension 5 is applied, thereby ensuring the sealing effect of the sealing gasket 6.

[0031] The sealing gasket 6 is provided with two concentrically arranged convex rings 61 on the surface facing away from the bottom of the groove 41. This makes the sealing effect of the sealing gasket 6 better, and at the same time can prevent the extension part 5 from rotating to a certain extent during the use of this embodiment, so that the extension part 5 is better fixed in the groove 41.

[0032] The surface of the extension part 5 facing the groove 41 is a frosted surface, and the surface of the retaining edge 412 facing the extension part 5 is a frosted surface, which can prevent the extension part 5 from rotating to a certain extent during the use of this embodiment.

[0033] The extension part 5 includes a truncated cone 1 52, a truncated cone 2 53 and a cylinder 54. The top diameter of the truncated cone 1 52 is smaller than the bottom area, the top diameter of the truncated cone 2 53 is smaller than the bottom diameter, the center lines of the truncated cone 1 52, the truncated cone 2 53 and the cylinder 54 coincide, the end surface of the cylinder 54 away from the housing 1 abuts against the bottom surface of the truncated cone 2 53, and the end surface diameter of the cylinder 54 is smaller than the bottom surface diameter of the truncated cone 2 53, the top surface of the truncated cone 2 53 abuts against the bottom surface of the truncated cone 1 52, and the top surface diameter of the truncated cone 2 53 is smaller than the bottom surface diameter of the truncated cone 1 52. It is convenient to fix the connected pipes and make the connection effect better.

[0034] When the angle between the axis of the through hole 121 and the axis of the through hole 2 122 is less than 175°, the inner wall of the through hole 121 includes an arcuate transition surface 1211, and the transition surface 1211 is arranged on the side of the through hole 121 facing the through hole 2 122. This allows the engine oil to flow smoothly in the through hole 12. In this embodiment, the through hole 121 and the through hole 2 122 of one through hole 12 are coaxially arranged, and the angle between the through hole 121 and the through hole 2 122 of the other through hole 12 is less than 175°.

[0035] The present invention is not limited to the above-mentioned specific implementation modes. A person skilled in the art may adopt other various specific implementation modes to implement the present invention according to the contents disclosed in the present invention, or any design structure and concept of the present invention with simple changes or modifications shall fall within the protection scope of the present invention.

Claims

1. An oil pump, comprising a housing, a rotating shaft arranged in the housing, and a worm gear arranged on the rotating shaft, wherein the housing comprises a protruding opening for the worm gear to protrude from the housing and two through holes for oil to enter and exit, characterized in that: It also includes a base integrally arranged with the shell and a cylindrical extension portion separately arranged with the shell, the base is provided with a groove, the groove wall of the groove is provided with an internal thread, the outer wall of the extension portion is provided with an external thread matching the internal thread, the through hole includes a through hole 1 passing through the extension portion and a through hole 2 arranged at the bottom of the groove, and the openings of the through hole 1 and the through hole 2 are opposite.

2. The oil pump according to claim 1, characterized in that: A sealing gasket made of elastic material is arranged between the extension portion and the bottom of the groove, and a through hole three is arranged in the middle of the sealing gasket, and the diameter of the through hole three is greater than or equal to the diameter of the through hole two.

3. The oil pump according to claim 2, characterized in that: The bottom of the groove is provided with a rib, which is annular and surrounds the second through hole. The sealing gasket is arranged between the rib and the groove wall of the groove, and the inner diameter of the rib is equal to the aperture of the first through hole. When the extension part abuts against the rib, the extension part is deformed by the force applied by the sealing gasket.

4. The oil pump according to claim 3, characterized in that: At least two concentrically arranged convex rings are arranged on the surface of the sealing gasket facing away from the bottom of the groove.

5. An oil pump according to claim 3 or 4, characterized in that: The surface of the extension portion facing the groove is a frosted surface, and the surface of the retaining edge facing the extension portion is a frosted surface.

6. The oil pump according to claim 5, characterized in that: The extension portion includes frustum 1, frustum 2 and a cylinder, the top surface diameter of frustum 1 is smaller than its bottom surface area, the top surface diameter of frustum 2 is smaller than its bottom surface diameter, the center lines of frustum 1, frustum 2 and the cylinder coincide, the end surface of the cylinder away from the shell abuts against the bottom surface of frustum 2, and the end surface diameter of the cylinder is smaller than the bottom surface diameter of frustum 2, the top surface of frustum 2 abuts against the bottom surface of frustum 1, and the top surface diameter of frustum 2 is smaller than the bottom surface diameter of frustum 1.

7. An oil pump according to claim 1 or 6, characterized in that: When the angle between the axis of the through hole 1 and the axis of the through hole 2 is less than 175°, the inner wall of the through hole 1 includes an arc-shaped transition surface, and the transition surface is arranged on the side of the through hole 1 facing the through hole 2.

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