CN213684505U - Oil pump shaft and rotor connection structure and variable displacement oil pump - Google Patents
Oil pump shaft and rotor connection structure and variable displacement oil pump Download PDFInfo
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- CN213684505U CN213684505U CN202022194794.3U CN202022194794U CN213684505U CN 213684505 U CN213684505 U CN 213684505U CN 202022194794 U CN202022194794 U CN 202022194794U CN 213684505 U CN213684505 U CN 213684505U
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- spline
- oil pump
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Abstract
The utility model discloses a connecting structure of an oil pump shaft and a rotor and a variable displacement oil pump, wherein, the pump shaft of the connecting structure of the oil pump shaft and the rotor is provided with an external spline, a first positioning part and a second positioning part, and the first positioning part and the second positioning part are arranged at two sides of the external spline; the inner circumferential surface of the rotor is provided with an inner spline matched with the outer spline of the pump shaft along the radial direction of the rotor; the pump shaft and the rotor are fixed through the external spline and the internal spline, and when the pump shaft is fixed on the rotor, the first positioning part and the second positioning part respectively abut against two ends of the rotor. The utility model provides an oil pump shaft and rotor connection structure sets up first location portion and second location portion respectively at the spline both ends of pump shaft, and when the rotor was connected with the pump shaft, first location portion and second location portion supported at the rotor both ends, fix a position the rotor respectively, reduce the rotor work in surely inclining to improve the oil pump and can satisfy the demand of bigger pressure, make the oil pump can normally work under 15Mpa ~ 20 MPa's operating mode.
Description
Technical Field
The utility model relates to the technical field of auto-parts, especially, relate to an oil pump shaft and rotor connection structure and variable displacement oil pump.
Background
The oil pump is an important part in an engine lubricating system, a pump shaft of the commercial vehicle variable pump is of a single-support structure, rolling friction is formed between the pump shaft and a pump body, the radial force is increased along with the increase of pressure, and a rotor is inclined under the action of the radial force, so that abnormal wear failure under the high-pressure state of the oil pump is easily caused, and the working pressure requirement of a whole vehicle steering system above 15MPa cannot be met.
Disclosure of Invention
In order to solve the technical problem, the utility model provides an oil pump shaft and rotor connection structure and high pressure resistant oil pump.
According to one aspect of the present invention, there is provided a connection structure of an oil pump shaft and a rotor, wherein the pump shaft is provided with an external spline, a first positioning portion and a second positioning portion, and the first positioning portion and the second positioning portion are arranged on two sides of the external spline; the inner circumferential surface of the rotor is provided with an inner spline matched with the outer spline of the pump shaft along the radial direction of the rotor; the pump shaft and the rotor are fixed through the external spline and the internal spline, and when the pump shaft is fixed on the rotor, the first positioning part and the second positioning part respectively abut against two ends of the rotor.
Alternatively, the diameters of the first positioning portion and the second positioning portion are the same as the small diameter of the rotor.
Optionally, a distance from a first end of the first positioning portion to a second end of the second positioning portion is greater than a length of the rotor; the distance from the second end of the first positioning portion to the first end of the second positioning portion is smaller than the length of the rotor.
Optionally, the length of the external splines is one quarter to one half of the length of the internal splines.
Optionally, the external spline is provided with a plurality of spline teeth along the circumferential direction of the pump shaft; the inner spline is provided with spline grooves with the same number as the spline teeth of the pump shaft along the inner circumferential surface of the rotor.
Optionally, the outer circumference of the rotor is provided with a plurality of uniformly distributed blade grooves; the blade groove and the pump shaft are inclined in the same direction at a preset angle.
According to another novel aspect, a variable displacement oil pump is provided, including the pump shaft and rotor connection structure of the present application.
The application of the oil pump shaft and rotor connection structure changes the shaft hole of the rotor into a full spline, the rotor is in key connection with the pump shaft, and the rotor is in full spline transmission. The first positioning part and the second positioning part which are the same as the small diameter of the rotor are arranged at the two ends of the spline of the pump shaft respectively, when the rotor is connected with the pump shaft, the first positioning part and the second positioning part support against the two ends of the rotor, the rotor is positioned at the front and the back respectively, the inclination of the rotor during working is reduced, and therefore the requirement that the oil pump can meet larger pressure is improved. The oil pump can work normally under the working condition of 15 MPa-20 MPa.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and, together with the description, serve to explain the invention without limitation to the invention. In the drawings:
FIG. 1 is a structural diagram of a pump shaft and rotor connecting structure of an oil pump in an embodiment;
FIG. 2 is a structural view of a pump shaft in the embodiment;
FIG. 3 is a schematic view of a rotor in an exemplary embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without any creative effort, shall fall within the protection scope of the present invention. It should be noted that, in the embodiments and examples of the present application, the feature vectors may be arbitrarily combined with each other without conflict.
The oil pump is an important part in an engine lubricating system, a pump shaft of the commercial vehicle variable pump is of a single-support structure, rolling friction is formed between the pump shaft and a pump body, the radial force is increased along with the increase of pressure, and a rotor is inclined under the action of the radial force, so that abnormal wear failure under the high-pressure state of the oil pump is easily caused, and the working pressure requirement of a whole vehicle steering system above 15MPa cannot be met.
The application provides an oil pump shaft and rotor connection structure changes the shaft hole of rotor into full spline, and the rotor passes through the key-type connection with the pump shaft, and the full spline of rotor drives. The first positioning part and the second positioning part which are the same as the small diameter of the rotor are arranged at the two ends of the spline of the pump shaft respectively, when the rotor is connected with the pump shaft, the first positioning part and the second positioning part support against the two ends of the rotor, the rotor is positioned at the front and the back respectively, the inclination of the rotor during working is reduced, and therefore the requirement that the oil pump can meet larger pressure is improved.
As shown in fig. 1, the oil pump shaft and rotor connection structure includes: the pump comprises a pump shaft 1 and a rotor 2, wherein the rotor 2 is sleeved on the pump shaft 1; the pump shaft 1 is provided with an external spline 10, a first positioning part 11 and a second positioning part 12, and the external spline 10 is arranged between the first positioning part 11 and the second positioning part 12; the inner circumferential surface of the rotor 2 is provided with an inner spline 20 matched with the outer spline 10 of the pump shaft 1 along the radial direction of the rotor 2; the pump shaft 1 penetrates through the rotor 2, the external spline 10 is in key connection with the internal spline 20, and the first positioning portion 11 and the second positioning portion 12 abut against two ends of the rotor 2 respectively.
As an example, the diameters of the first positioning portion 11 and the second positioning portion 12 are the same as the small diameter of the rotor 2. Wherein, rotor 2's internal spline 20 is the involute spline in this application, and rotor 2's path is rotor 2's internal spline's path in this application.
As an example, the distance from the first end 111 of the first positioning portion 11 to the second end 122 of the second positioning portion 12 is greater than the length of the rotor 2; the distance from the second end 112 of the first positioning portion 11 to the first end 121 of the second positioning portion 12 is smaller than the length of the rotor 2.
As an example, the pump shaft 1 further includes a clamping seat 13, and the first positioning portion 11, the external spline 10, the second positioning portion 12, and the clamping seat 13 are sequentially disposed on the pump shaft 1 from the first end 14 to the second end 15 of the pump shaft 1.
Based on the above example, the second end 15 of the pump shaft 1 forms a handle for rotating the pump shaft 1, and the shape of the handle is set according to the use requirement of the oil pump, and for example, the handle may be set in a cross shape or provided with a rotating spline for rotation on the outer circumference.
As an example, the length of the external spline 10 is one quarter to one half of the length of the internal spline 20, and preferably, the length of the external spline 10 is one third of the length of the internal spline 20.
As an example, the external spline 1 is provided with a plurality of spline teeth along the circumferential direction of the pump shaft 1; the internal spline 20 is provided with spline grooves of the same number as the spline teeth of the pump shaft 1 along the inner peripheral surface of the rotor 2.
As an example, the spline teeth of the external spline 10 are rectangular teeth, trapezoidal teeth, fan-shaped teeth, and tapered teeth, and the spline grooves of the internal spline 20 are rectangular grooves, trapezoidal grooves, fan-shaped grooves, and tapered teeth matching the spline teeth.
Preferably, the external spline 10 is uniformly provided with an odd number of isosceles trapezoid teeth having the same size along the circumferential direction of the pump shaft 1, and the internal spline 20 is provided with an odd number of isosceles trapezoid grooves having the same size along the inner circumferential surface of the rotor 2. The number of external splines 10 is the same as the number of internal splines 20.
As an example, the outer circumferential surface of the rotor 2 is provided with a plurality of uniformly distributed vane grooves 21; the vane groove 21 is inclined in the same direction at a predetermined angle with respect to the pump shaft 1.
As an example, the pump shaft 1 further includes a clamping seat 13, and the first positioning portion 11, the external spline 10, the second positioning portion 12, and the clamping seat 13 are sequentially disposed on the pump shaft 1 from the first end 14 to the second end 15 of the pump shaft 1.
Based on the above example, the second end 15 of the pump shaft 1 forms a handle for rotating the pump shaft 1, and the shape of the handle is set according to the use requirement of the oil pump, and for example, the handle may be set in a cross shape or provided with a rotating spline for rotation on the outer circumference. As an example, the rotor 2 comprises a 20CrNiMo steel substrate and a DLC layer covering the surface of the steel substrate, wherein the DLC layer has a thickness of 0.1-10 nm.
As an example, the pump shaft 2 comprises a 20CrNiMo steel substrate and a DLC layer covering the surface of the steel substrate, wherein the DLC layer is 0.1-10 nm thick.
The utility model provides a variable displacement oil pump, including the pump body, pump cover, pump shaft, stator, blade and the oil pump shaft and the rotor connection structure of this application. One end opening of the pump body, the pump cover seals the opening of the pump body and forms the pump chamber, the stator sets up in the pump chamber, rotor 2 sets up in the stator chamber, pump shaft 1 passes the pump cover, passes rotor 2, the first end 14 and the pump cover contact of pump shaft 1 are connected, the cassette 13 card of pump shaft 1 is on the pump cover.
It is to be noted that, in this document, the terms "comprises", "comprising" or any other variation thereof are intended to cover a non-exclusive inclusion, so that an article or apparatus including a series of elements includes not only those elements but also other elements not explicitly listed or inherent to such article or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of additional like elements in the article or device comprising the element.
The above embodiments are merely to illustrate the technical solution of the present invention, not to limit the same, and the present invention is described in detail with reference to the preferred embodiments. It will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the true spirit and scope of the novel concept as defined by the appended claims.
Claims (7)
1. A connecting structure of an oil pump shaft and a rotor is characterized in that,
the pump shaft (1) is provided with an external spline (10), a first positioning part (11) and a second positioning part (12), and the first positioning part (11) and the second positioning part (12) are arranged on two sides of the external spline (10);
the inner circumferential surface of the rotor (2) is provided with an inner spline (20) matched with the outer spline (10) of the pump shaft (1) along the radial direction of the rotor (2);
the pump shaft (1) and the rotor (2) are fixed through the external spline (10) and the internal spline (20), and when the pump shaft (1) is fixed on the rotor (2), the first positioning part (11) and the second positioning part (12) respectively abut against two ends of the rotor (2).
2. The oil pump shaft and rotor connection structure according to claim 1, wherein the first positioning portion (11) and the second positioning portion (12) have the same diameter as the small diameter of the rotor (2).
3. The oil pump shaft and rotor connection structure according to claim 1, wherein a distance from a first end (111) of the first positioning portion (11) to a second end (122) of the second positioning portion (12) is greater than a length of the rotor (2); the distance from the second end (112) of the first positioning portion (11) to the first end (121) of the second positioning portion (12) is less than the length of the rotor (2).
4. The oil pump shaft and rotor connection according to claim 3, characterized in that the length of the external spline (10) is one quarter to one half of the length of the internal spline (20).
5. The oil pump shaft and rotor connection structure according to claim 4, wherein the external spline (10) is provided with a plurality of spline teeth along a circumferential direction of the pump shaft (1); the internal spline (20) is provided with spline grooves with the same number as the spline teeth of the pump shaft (1) along the inner circumferential surface of the rotor (2).
6. The oil pump shaft and rotor connection structure according to claim 1, wherein the rotor (2) has a plurality of uniformly distributed vane grooves (21) on its outer circumferential surface; the blade groove (21) and the pump shaft (1) are arranged in a manner of inclining towards the same direction at a preset angle.
7. A variable displacement oil pump, characterized by comprising a pump shaft and rotor connection structure according to any one of claims 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022194794.3U CN213684505U (en) | 2020-09-29 | 2020-09-29 | Oil pump shaft and rotor connection structure and variable displacement oil pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022194794.3U CN213684505U (en) | 2020-09-29 | 2020-09-29 | Oil pump shaft and rotor connection structure and variable displacement oil pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213684505U true CN213684505U (en) | 2021-07-13 |
Family
ID=76751385
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022194794.3U Active CN213684505U (en) | 2020-09-29 | 2020-09-29 | Oil pump shaft and rotor connection structure and variable displacement oil pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213684505U (en) |
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2020
- 2020-09-29 CN CN202022194794.3U patent/CN213684505U/en active Active
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