CN210035002U

CN210035002U - Variable slider and variable displacement oil pump

Info

Publication number: CN210035002U
Application number: CN201920609582.1U
Authority: CN
Inventors: 刘涛; 林文; 闫立虎; 杨乐; 苏旭朝; 姜志永
Original assignee: Great Wall Motor Co Ltd
Current assignee: Great Wall Motor Co Ltd
Priority date: 2019-04-29
Filing date: 2019-04-29
Publication date: 2020-02-07
Anticipated expiration: 2029-04-29

Abstract

The utility model relates to a variable slider and a variable displacement oil pump, wherein the variable slider is arranged in a pump shell of the oil pump and sleeved outside a rotating blade component, and comprises a main body and a rotating support part constructed on the main body; a containing hole for containing the rotating blade component is formed on the main body; the rotation supporting part is in sliding butt joint with the inner wall of the pump shell to form a support of the variable sliding block in the pump shell, and the rotation supporting part is driven by the pressure of oil in a pressure feedback oil duct on the oil pump so that the variable sliding block has rotary displacement relative to the pump shell. The variable slider of the utility model realizes the rotary motion of the variable slider in the pump shell by arranging the rotary supporting part, and can reduce the pump shell space occupied by the variable slider, thereby being beneficial to the miniaturization design of the oil pump and simultaneously reducing the assembly difficulty of the variable slider in the pump shell; in addition, the engine oil displacement is adjusted through the rotation of the variable sliding block, and a good control and adjustment effect can be achieved.

Description

Variable slider and variable displacement oil pump

Technical Field

The utility model relates to an oil pump technical field, in particular to variable slider, simultaneously, the utility model discloses still relate to a variable displacement oil pump with this variable slider.

Background

Because the output pressure of the oil pump with the fixed displacement and the rotating speed of the oil pump are in a linear relationship, the pressure regulating valve needs to be opened prematurely under the working conditions of low speed and high oil temperature of the engine, and the efficiency of the oil pump is reduced. In order to solve the problem, the variable displacement oil pump, particularly the two-stage variable displacement oil pump, is widely applied due to high working efficiency. Based on the working principle of the variable displacement engine oil pump, a variable slider (also called a 'control ring') plays an important role in adjusting the variable displacement of the engine oil pump, and the variable slider not only needs to ensure the continuous variability of an oil cavity, but also needs to ensure the adjustment precision. The variable slider in the prior art is generally connected to the pump shell through a pin shaft, and can swing around the pin shaft to realize the adjustment of the engine oil discharge capacity through the swing of the variable slider. The structure occupies a larger inner space of the pump shell, is not beneficial to the miniaturization design of the oil pump, and has the advantages of complex structure, larger assembly difficulty and higher cost. In addition, the variable sliding block is unreasonable in structural design, so that the engine oil displacement is adjusted slowly, and the control and adjustment accuracy is low.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims at providing a variable slider, it can reduce shared pump case space to can reduce the assembly degree of difficulty in the pump case, also can improve the control adjustment precision to the machine oil discharge capacity simultaneously.

In order to achieve the above purpose, the technical scheme of the utility model is realized like this:

the utility model provides a variable slider, sets up in the pump case of oil pump to the cover is located the rotating vane subassembly outside, and its this variable slider includes:

a main body formed with a receiving hole to receive the rotating blade assembly;

a rotation support part configured on the main body and in sliding contact with the inner wall of the pump shell so as to form a support of the variable displacement slide block in the pump shell; and the rotation supporting part is driven by the pressure of oil in the pressure feedback oil passage on the oil pump, so that the variable slide block can rotate and displace relative to the pump shell.

Furthermore, the rotation supporting part comprises a plurality of supporting blocks which are arranged around the main body at intervals in the circumferential direction and protrude outwards in the radial direction.

Furthermore, the rotation supporting part comprises three supporting blocks, and an included angle between any two adjacent supporting blocks is an obtuse angle.

Furthermore, each supporting block is in sliding butt joint with the inner wall of the pump shell through an arc-shaped surface constructed at the end part, and a matching surface matched with the arc-shaped surface is formed on the pump shell corresponding to the arc-shaped surface; and each arc-shaped surface is concentrically arranged.

Further, the radius of curvature of each of the arcuate surfaces is different.

Furthermore, the pressure feedback oil channel is communicated with a region between two adjacent supporting blocks, and sealing components which are abutted with the pump shell are arranged on the two supporting blocks which form the region in a surrounding manner.

Further, the sealing assemblies are received in receiving grooves formed at the ends of the respective support blocks.

Further, the accommodation hole is configured as an elliptical hole.

Further, the center of the receiving hole is the same as the rotation center of the rotary vane member.

Compared with the prior art, the utility model discloses following advantage has:

(1) the variable slider of the utility model can realize the rotary motion of the variable slider in the pump case by arranging the rotary supporting part, and compared with the swing motion of the variable slider in the pump case in the prior art, the pump case space occupied by the variable slider can be greatly reduced, thereby being beneficial to the miniaturization design of the oil pump and simultaneously reducing the assembly difficulty of the variable slider in the pump case; in addition, the engine oil displacement is adjusted through the rotation of the variable sliding block, and a good control and adjustment effect can be achieved.

(2) The supporting part adopts the supporting shoe, simple structure, and the design of being convenient for is implemented.

(3) An included angle between any two adjacent supporting blocks is set to be an obtuse angle, so that the supporting stability of the variable sliding block is improved.

(4) Through setting up arcwall face and fitting surface, be favorable to improving the rotational accuracy of variable slider to can improve the control accuracy to machine oil discharge capacity.

(5) The sealing assembly is arranged to prevent oil in the pressure feedback oil channel from flowing out from a gap between the supporting block and the pump shell, so that oil pressure leakage in the pressure feedback oil channel can be avoided.

(6) The arrangement of the accommodating groove is beneficial to realizing the arrangement of the sealing component on the supporting block, and meanwhile, the sealing effect of the sealing component can also be improved.

(7) The containing hole is constructed into an elliptical hole, so that the precision and the sensitivity of the displacement adjustment of the oil pump are improved.

(8) The center of the containing hole is the same as the rotation center of the rotating blade assembly, and the control and adjustment effect on the displacement of the oil pump can be improved.

Another object of the utility model is to provide a variable displacement oil pump, including having the pump case that holds the chamber, rotate and locate hold the rotor in the chamber, link firmly in rotating vane subassembly on the rotor forms in pressure feedback oil duct on the pump case, variable displacement oil pump is still located including the cover the outer as above of rotating vane subassembly variable slide block.

Variable discharge capacity oil pump, through setting up as above the variable slider, be favorable to realizing the miniaturized design of this oil pump to can reduce the assembly degree of difficulty of this oil pump, simultaneously, also can improve the control regulation effect to the machine oil discharge capacity.

Drawings

The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and 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 undue limitation. In the drawings:

fig. 1 is a schematic structural diagram of a variable slider according to a first embodiment of the present invention;

fig. 2 is a schematic structural diagram of a variable displacement oil pump according to a second embodiment of the present invention;

FIG. 3 is an enlarged view of portion I of FIG. 2;

description of reference numerals:

1-pump housing, 101-accommodating chamber;

2-variable sliding block, 201-main body, 201-containing hole, 2012-pressing plate, 202-first supporting block, 203-second supporting block, 204-third supporting block;

3-rotating blade assembly, 4-driving shaft, 5-rotor, 6-adjusting spring, 7-oil inlet cavity, 8-pressure feedback oil channel, 9-oil outlet cavity, 10-elastic pushing piece and 11-scraping piece.

Detailed Description

It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.

The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

Example one

The utility model relates to a variable slider, it sets up in the pump case of oil pump and the cover is located the rotating vane subassembly outside, and this variable slider mainly includes the main part and constructs the rotation supporting part in the main part. Wherein, a containing hole for containing the rotating blade component is formed on the main body; the rotation supporting part is in sliding butt joint with the inner wall of the pump shell to form a support of the variable sliding block in the pump shell, and the rotation supporting part is driven by the pressure of oil in a pressure feedback oil duct on the oil pump so that the variable sliding block has rotary displacement relative to the pump shell.

Based on the above overall structure, and with reference to the detailed description of an exemplary structure of the variable slider shown in fig. 1 and fig. 2, in this embodiment, the main body 201 is annular, the aforementioned receiving hole 2011 is formed by the inner circumference of the main body 201, and in addition, a pressing plate 2012 protruding along the radial direction of the main body 201 is configured on the main body 201 for pushing against the adjusting spring 6 in the oil pump. Further, based on the operating performance of the oil pump, in order to improve the use effect, particularly, the adjustment sensitivity and the control accuracy of the oil displacement, the housing hole 2011 of the present embodiment is configured as an elliptical hole, and the center of the housing hole 2011 is the same as the rotation center of the above-described rotating vane assembly 3. Further, in order to obtain better use effect, the outer ring of the main body 201 of the present embodiment is substantially circular and is disposed concentrically with the containing hole 2011. It should be noted that the receiving hole 2011 of the present embodiment may be configured as a long hole having another shape similar to the elliptical hole, instead of being configured as the elliptical hole.

In order to reduce the processing cost and facilitate assembly, the aforementioned rotation support portion includes a plurality of support blocks which are circumferentially spaced and radially outwardly protruded from the ring main body 201. The preferred three supporting shoe that encircles the circumference interval distribution of main part 201 of rotation supporting part of this embodiment, and for improving the supporting effect to improve the regulation effect of variable slider, the contained angle between two arbitrary adjacent supporting shoes is the obtuse angle, so set up and to make this three supporting shoe roughly be the equipartition setting, thereby can improve the support stability to variable slider. In the present embodiment, for convenience of description below, the three support blocks are referred to as a first support block 202, a second support block 203, and a third support block 204, respectively. As shown in fig. 1, the first support block 202 and the second support block 203 are substantially rectangular, the third support block 204 is arc-shaped, and receiving grooves are formed at ends of the second support block 203 and the third support block 204.

Based on the rotary motion of variable slider, each supporting shoe of this embodiment is by constructing the cambered surface and the sliding butt of pump case 1 inner wall at its tip respectively to corresponding to the cambered surface, be formed with the fitting surface that matches with the cambered surface on pump case 1, and construct the concentric setting of three cambered surface on three supporting shoe respectively. In addition, in order to improve the use effect, the curvature radii of the three arc-shaped surfaces of the present embodiment are different, and specifically, the curvature radii R1, R3, R2 of the arc-shaped surfaces of the first support block 202, the third support block 204, and the second support block 203 are sequentially gradually increased. At this time, in combination with the circular structure of the outer ring of the variable slider, when the oil pressure in the pressure feedback oil passage 8 acts on the first supporting block 202 and the second supporting block 203 simultaneously, the variable slider can be driven to rotate in the counterclockwise direction shown in fig. 1, that is, in the direction in which the oil displacement is small, because the pressure receiving area of the second supporting block 203 is large.

In addition, as shown in fig. 1 and fig. 2, in the assembled state of the variable displacement block, the pressure feedback oil passage 8 is specifically communicated between the first supporting block 202 and the second supporting block 203, and in order to prevent oil in the pressure feedback oil passage 8 from leaking, in this embodiment, sealing components abutting against the pump casing 1 are respectively accommodated in the accommodating grooves of the first supporting block 202 and the second supporting block 203. In order to improve the sealing effect, as shown in fig. 2 and 3, the sealing assembly of this embodiment includes a scraping blade 11 abutting against the inner wall of the pump housing 1, and an elastic pushing member 10 elastically abutting between the scraping blade 11 and the supporting block, where the elastic pushing member 10 may specifically adopt a ball made of an elastic material as shown in fig. 3, or directly adopt other structures such as a compression spring. Wherein the specific design and manufacture of the sealing assembly can be referred to the prior art.

Based on the above overall description, the variable slider of the embodiment can realize the rotational movement of the variable slider in the pump case 1 by arranging the rotational support portion, and compared with the swing movement of the variable slider in the pump case 1 in the prior art, the variable slider can greatly reduce the space of the pump case 1 occupied by the variable slider, thereby facilitating the miniaturization design of the oil pump and simultaneously reducing the assembly difficulty of the variable slider in the pump case 1; in addition, the engine oil displacement is adjusted through the rotation of the variable sliding block, and a good control and adjustment effect can be achieved.

Example two

The present embodiment relates to a variable displacement oil pump, as shown in fig. 2, which includes a pump casing 1 having a receiving cavity 101, a driving shaft 4 disposed in the receiving cavity 101, a rotor 5 fixedly connected to the driving shaft 4, a rotating vane assembly 3 fixedly connected to the rotor 5, a front pressure feedback oil channel formed on the pump casing 1, and a rear pressure feedback oil channel enclosed between the pump casing 1 and a variable slider 2, wherein the structure of the variable slider 2 of the present embodiment is similar to the structure of the variable slider 2 described in the first embodiment, and is not described herein again. And the second supporting block 203 and the third supporting block 204 are specifically arranged at two ends of the rear-section pressure feedback oil channel.

In an initial state, the variable displacement oil pump of this embodiment is such that the minor axis of the accommodating hole 2011 of the variable slider 2 is arranged corresponding to the oil inlet cavity 7 and the oil outlet cavity 9, so that when the variable slider 2 rotates counterclockwise as shown in fig. 2 along with the increase of the engine speed, the volume change between two adjacent vanes at the oil inlet cavity 7 and the oil outlet cavity 9 is large due to the elliptical hole structure of the accommodating hole 2011, so as to accelerate the adjustment of the oil pressure and have a good adjusting effect; in addition, the variable slider 2 is beneficial to realizing the miniaturization design of the oil pump and reducing the assembly difficulty of the oil pump.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a variable slider, sets up in pump case (1) of oil pump to the cover is located the rotating vane subassembly (3) outside, its characterized in that, this variable slider includes:

a main body (201) formed with a housing hole (2011) to house the rotating blade assembly (3);

a rotation support part which is constructed on the main body (201) and is in sliding contact with the inner wall of the pump shell (1) so as to form a support of the variable displacement slide block (2) in the pump shell (1); and the rotation supporting part is driven by the pressure of oil in a pressure feedback oil passage (8) on the oil pump, so that the variable slider (2) can rotate and displace relative to the pump shell (1).

2. The variable slider of claim 1, wherein: the rotating support part comprises a plurality of support blocks which are arranged around the main body (201) at intervals in the circumferential direction and protrude outwards in the radial direction.

3. The variable slider of claim 2, wherein: the rotation supporting part comprises three supporting blocks, and an included angle between any two adjacent supporting blocks is an obtuse angle.

4. The variable slider of claim 2, wherein: each supporting block is in sliding butt joint with the inner wall of the pump shell (1) through an arc-shaped surface constructed at the end part, and a matching surface matched with the arc-shaped surface is formed on the pump shell (1) corresponding to the arc-shaped surface; and each arc-shaped surface is concentrically arranged.

5. The variable slider of claim 4, wherein: the radius of curvature of each of the arcuate surfaces is different.

6. The variable slider of claim 2, wherein: the pressure feedback oil channel (8) is communicated with a region between two adjacent supporting blocks, and sealing components which are abutted against the pump shell (1) are arranged on the two supporting blocks which form the region in a surrounding manner.

7. The variable slider of claim 6, wherein: the sealing assemblies are received in receiving grooves formed at the ends of the respective support blocks.

8. The variable slider of any of claims 1 to 7, wherein: the receiving bore (2011) is configured as an elliptical bore.

9. The variable slider of claim 8, wherein: the center of the housing hole (2011) is the same as the rotation center of the rotating blade assembly (3).

10. A variable displacement oil pump, comprising a pump housing (1) having a receiving chamber (101), a rotor (5) rotatably disposed in the receiving chamber (101), a rotating vane assembly (3) attached to the rotor (5), and a pressure feedback oil passage (8) formed in the pump housing (1), characterized in that: the variable displacement oil pump further comprises a variable displacement slider (2) according to any one of claims 1 to 9 sleeved outside the rotating vane assembly (3).