阅读说明：本技术 一种变量斜盘组件的摩擦副结构 (Friction pair structure of variable swash plate assembly ) 是由 李禧 梁元斌 李化军 于 2020-12-30 设计创作，主要内容包括：本发明公开了一种变量斜盘组件的摩擦副结构,包括斜盘座和转动设置在该斜盘座上的斜盘,斜盘座的端面上以斜盘座的主轴孔为对称轴左右对称地成型有两个用于转动支撑斜盘的支撑凸块,支撑凸块上加工有凹入的内弧支撑面,斜盘的左右两侧面上成型有用于架设支撑在支撑凸块上的支撑耳,支撑耳上成型有与支撑凸块的内弧支撑面相适配转动支撑配合的外弧支撑面,并且内弧支撑面上可更换地卡装有耐磨的下轴瓦,外弧支撑面上可更换地卡装有与下轴瓦转动摩擦相配合用于提高斜盘座与斜盘间耐磨性能的上轴瓦。本发明制作成本低、组装容易,并且变量灵活,耐磨性好,能保证斜盘组件摩擦副要求。(The invention discloses a friction pair structure of a variable swash plate assembly, which comprises a swash plate seat and a swash plate rotationally arranged on the swash plate seat, wherein two supporting lugs for rotationally supporting the swash plate are symmetrically formed on the left side and the right side of the end surface of the swash plate seat by taking a main shaft hole of the swash plate seat as a symmetry axis, concave inner arc supporting surfaces are processed on the supporting lugs, supporting lugs for erecting and supporting the supporting lugs are formed on the left side surface and the right side surface of the swash plate, outer arc supporting surfaces matched with the inner arc supporting surfaces of the supporting lugs in a matched rotating and supporting mode are formed on the supporting lugs, a wear-resistant lower bearing bush is replaceably clamped on the inner arc supporting surfaces, and an upper bearing bush matched with the lower bearing bush in a rotating and friction mode and used for improving the wear resistance between the swash plate seat and the swash plate is replaceably clamped on the outer arc supporting surfaces. The invention has the advantages of low manufacturing cost, easy assembly, flexible variation and good wear resistance, and can ensure the requirement of the swash plate component on the friction pair.)

1. The utility model provides a friction pair structure of variable sloping cam plate subassembly, includes sloping cam plate seat (1) and rotates sloping cam plate (2) of setting on this sloping cam plate seat (1), characterized by: two supporting convex blocks (11) for rotatably supporting the swash plate (2) are formed on the end surface of the swash plate seat (1) in a bilateral symmetry manner by taking a main shaft hole (1a) of the swash plate seat (1) as a symmetry axis, a concave inner arc supporting surface (11a) is processed on the supporting convex block (11), supporting lugs (21) used for being erected and supported on the supporting convex block (11) are formed on the left side surface and the right side surface of the swash plate (2), an outer arc supporting surface (21a) matched with the inner arc supporting surface (11a) of the supporting lug (11) in a rotating supporting way is formed on the supporting lug (21), and the inner arc supporting surface (11a) is replaceably clamped with a wear-resistant lower bearing bush (3), the outer arc supporting surface (21a) is replaceably clamped with an upper bearing bush (4) which is matched with the lower bearing bush (3) in a rotating friction way and is used for improving the wear resistance between the swash plate seat (1) and the swash plate (2).

2. The friction pair structure of a variable swash plate assembly as claimed in claim 1, wherein: the bearing shell is characterized in that a lower bearing shell clamping groove (11b) used for clamping and installing a lower bearing shell (3) is formed in the inner arc supporting surface (11a) along the arc length of the whole inner arc supporting surface (11a), and an upper bearing shell clamping groove (21b) used for clamping and installing an upper bearing shell (4) is formed in the outer arc supporting surface (21a) along the arc length of the whole outer arc supporting surface (21 a).

3. The friction pair structure of a variable swash plate assembly as claimed in claim 2, wherein: the center of the inner arc supporting surface (11a) and the center of the outer arc supporting surface (21a) are both provided with a positioning pin hole (K1) for inserting a positioning pin (5), the center of the lower bearing bush (3) and the center of the upper bearing bush (4) are both provided with a through hole (K2) for positioning and penetrating the positioning pin (5), the lower bearing bush (3) is positioned and clamped in a lower bearing bush clamping groove (11b) of the inner arc supporting surface (11a) in a movement-proof manner through the positioning pin (5), and the upper bearing bush (4) is positioned and clamped in an upper bearing bush clamping groove (21b) of the outer arc supporting surface (21a) in a movement-proof manner through the positioning pin (5).

4. A friction pair structure of a variable swash plate assembly as claimed in claim 3, wherein: the depth of the lower bearing bush clamping groove (11b) is smaller than the thickness of the lower bearing bush (3), and the friction contact surface of the lower bearing bush (3) and the upper bearing bush (4) is a concave arc surface (3 a); the depth of the upper bearing bush clamping groove (21b) is smaller than the thickness of the upper bearing bush (4), and the friction contact surface of the upper bearing bush (4) and the lower bearing bush (3) is a convex arc surface (4a) matched with the concave arc surface (3a) of the lower bearing bush (3).

5. The friction pair structure of a variable swash plate assembly according to claim 4, wherein: a lubricating oil passage (d1) for communicating lubricating oil is machined in the swash plate seat (1), a lubricating oil outlet (d2) for connecting the lubricating oil passage (d1) is drilled in the inner arc supporting surface (11a), and a lubricating oil hole for communicating the lubricating oil outlet (d2) is machined in the lower bearing bush (3).

6. The friction pair structure of a variable swash plate assembly according to claim 5, wherein: a protective edge (12) for preventing the swash plate (2) from moving in a left-right mode is formed on the outer side of the supporting convex block (11) on the end face of the swash plate seat (1), the swash plate (2) rotates in a limited mode by taking the central axis of a circle where the inner arc supporting surface (11a) is located as a rotating axis, and the central axis is perpendicularly intersected with the axis of a spindle hole (1a) of the swash plate seat (1).

7. The friction pair structure of a variable swash plate assembly as claimed in claim 6, wherein: the arc length of the upper bearing bush (4) is larger than that of the lower bearing bush (3), and the rotation stroke of the swash plate (2) is within the effective arc length of the lower bearing bush (3).

8. The friction pair structure of a variable swash plate assembly as claimed in claim 7, wherein: the swash plate (2) is provided with a thrust plate (6).

Technical Field

The invention relates to the technical field of variable displacement pumps, in particular to a friction pair structure of a variable swash plate assembly used in a variable displacement pump.

Background

In a variable mechanism of a hydraulic plunger pump, in order to improve the wear resistance of a swash plate assembly, most of friction surfaces of the swash plate assembly are treated by processes of nitriding, sintering copper, laser quenching and the like at present, but the friction surfaces have the defects of unstable wear resistance, easy wear and low reusability.

Disclosure of Invention

The invention aims to solve the technical problem of providing a friction pair structure of a variable swash plate component, which has flexible variable, good wear resistance, low production cost and convenient assembly, aiming at the current situation of the prior art.

The technical scheme adopted by the invention for solving the technical problems is as follows:

the utility model provides a friction pair structure of variable sloping cam plate subassembly, including sloping cam plate seat and the sloping cam plate of rotation setting on this sloping cam plate seat, use the main shaft hole of sloping cam plate seat to form two support lugs that are used for rotating the support sloping cam plate on the terminal surface of sloping cam plate seat bilateral symmetry as the symmetry axis, processing has recessed inner arc holding surface on the support lug, the shaping has the support ear that is used for erectting to support on the support lug on the left and right sides face of sloping cam plate, the shaping has the outer arc holding surface that supports the complex with the inner arc holding surface looks adaptation rotation of support lug on the support ear, and changeably clamp the wear-resisting lower bearing shell on the inner arc holding surface, changeably clamp the upper bearing shell that cooperatees with lower bearing shell rotation friction and is used for improving the wear resistance between sloping cam plate seat and sloping cam plate on the outer arc holding surface.

In order to optimize the technical scheme, the specific measures adopted further comprise:

the arc length of the inner arc supporting surface along the whole inner arc supporting surface is provided with a lower bearing bush clamping groove used for clamping and installing a lower bearing bush, and the arc length of the outer arc supporting surface along the whole outer arc supporting surface is provided with an upper bearing bush clamping groove used for clamping and installing an upper bearing bush.

The center of the inner arc supporting surface and the center of the outer arc supporting surface are both provided with positioning pin holes for inserting positioning pins, the centers of the lower bearing bush and the upper bearing bush are both provided with through holes for positioning the positioning pins to penetrate, the lower bearing bush is positioned and clamped in a lower bearing bush clamping groove of the inner arc supporting surface in a movement-preventing manner through the positioning pins, and the upper bearing bush is positioned and clamped in an upper bearing bush clamping groove of the outer arc supporting surface in a movement-preventing manner through the positioning pins.

The depth of the lower bearing bush clamping groove is smaller than the thickness of the lower bearing bush, and the friction contact surface of the lower bearing bush and the upper bearing bush is a concave arc surface; the depth of the upper bearing bush clamping groove is smaller than the thickness of the upper bearing bush, and the friction contact surface of the upper bearing bush and the lower bearing bush is a convex arc surface matched with the concave arc surface of the lower bearing bush.

A lubricating oil channel used for communicating lubricating oil is processed on the swash plate seat, a lubricating oil outlet used for connecting the lubricating oil channel is drilled on the inner arc supporting surface, and a lubricating oil hole used for communicating the lubricating oil outlet is processed on the lower bearing bush.

The end surface of the swash plate seat is provided with a protective edge which is positioned on the outer side of the supporting lug and used for preventing the swash plate from moving in a left-right mode, the swash plate rotates in a limited mode by taking the central axis of a circle where the inner arc supporting surface is positioned as a rotating axis, and the central axis is perpendicularly intersected with the axis of a main shaft hole of the swash plate seat.

The arc length of the upper bearing bush is larger than that of the lower bearing bush, and the rotating stroke of the swash plate is within the effective arc length of the lower bearing bush.

The swash plate is provided with a thrust plate.

Compared with the prior art, the invention processes the arc-shaped inner arc supporting surface on the supporting lug of the swash plate seat, processes the outer arc supporting surface on the supporting lug of the swash plate, and the inner arc supporting surface is provided with the lower bearing bush, and the outer arc supporting surface is provided with the upper bearing bush, thereby improving the wear resistance between the swash plate seat and the swash plate by utilizing the rotating friction fit of the lower bearing bush and the upper bearing bush. When the lower bearing bush or the upper bearing bush is worn, the requirement of a friction pair of the swash plate assembly can be met by replacing the upper bearing bush and the lower bearing bush, and the service lives of the swash plate seat and the swash plate are prolonged.

The invention has the advantages of low manufacturing cost, easy assembly, flexible variation and good wear resistance, and can ensure the requirement of the swash plate component on the friction pair.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a left side sectional view of FIG. 1;

FIG. 3 is a front view structural view of the swash plate base of the present invention;

FIG. 4 is a sectional view in the direction A-A of FIG. 3;

FIG. 5 is a sectional view in the direction B-B in FIG. 3;

FIG. 6 is a front view structural view of the swash plate of the present invention;

FIG. 7 is a left side view of FIG. 6;

FIG. 8 is a cross-sectional structural view taken in the direction C-C of FIG. 6;

FIG. 9 is a cross-sectional structural view taken in the direction D-D in FIG. 6;

FIG. 10 is a schematic view of the construction of the lower bearing shell of the present invention;

FIG. 11 is a cross-sectional structural view of the lower bearing shell of the present invention;

FIG. 12 is a front view of the upper shell of the present invention;

FIG. 13 is a bottom view of FIG. 12;

figure 14 is a cross-sectional structural view of the upper shell of the present invention.

Detailed Description

Embodiments of the present invention are described in further detail below with reference to the accompanying drawings.

Fig. 1 to 12 are structural illustrations of the present invention.

Wherein the reference numerals are: the bearing comprises a lubricating oil channel d1, a lubricating oil outlet d2, a positioning pin hole K1, a through hole K2, a swash plate seat 1, a spindle hole 1a, a supporting convex block 11, an inner arc supporting surface 11a, a lower bearing bush clamping groove 11b, a protective edge 12, a swash plate 2, a supporting lug 21, an outer arc supporting surface 21a, an upper bearing bush clamping groove 21b, a lower bearing bush 3, a concave arc surface 3a, an upper bearing bush 4, a convex arc surface 4a, a positioning pin 5 and a thrust plate 6.

As shown in fig. 1 to 12, the present invention discloses a friction pair structure of a variable swash plate assembly, the friction pair of the swash plate assembly comprises a swash plate base 1 and a swash plate 2 rotatably arranged on the swash plate base 1, the swash plate 2 can make a pitching motion by taking a supporting axis as a rotation axis under the supporting action of the swash plate base 1, so as to change the inclination angle of the swash plate 2, and thus, the variable control of a pump is realized.

In order to ensure the flexibility of variables, two supporting convex blocks 11 for rotatably supporting the swash plate 2 are symmetrically formed on the end surface of the swash plate seat 1 in a left-right mode by taking the main shaft hole 1a of the swash plate seat 1 as a symmetrical shaft, a concave inner arc supporting surface 11a is processed on each supporting convex block 11, the central axis of a circle where the inner arc supporting surface 11a is located is the supporting axis, and the central axis is perpendicular to and intersected with the axial line of the main shaft hole 1a of the swash plate seat 1. The swash plate 2 can be rotated limitedly with the central axis of the circle on which the inner arc support surface 11a is located as the rotation axis, i.e., the inclination angle of the swash plate 2 can be adjusted to have a maximum and a minimum angle range. In order to match the inner arc support surfaces 11a, as shown in fig. 6, support lugs 21 for rotatably mounting and supporting the support lugs 11 are formed on the left and right side surfaces of the swash plate 2, outer arc support surfaces 21a matched with the inner arc support surfaces 11a of the support lugs 11 are formed on the support lugs 21, and the inner arc support surfaces 11a are rotatably supported and matched with the outer arc support surfaces 21 a. Further, in order to prevent the inner arc support surface 11a and the outer arc support surface 21a from being worn to shorten the service life of the swash plate seat 1 or the swash plate 2 and overcome the problem that the inner arc support surface 11a and the outer arc support surface 21a need to be reprocessed by the conventional processes of nitriding, copper sintering, laser quenching and the like, the invention has the advantages that the wear-resistant lower bearing bush 3 is replaceably clamped on the inner arc support surface 11a, and the upper bearing bush 4 which is matched with the lower bearing bush 3 in a rotating friction way is replaceably clamped on the outer arc support surface 21a, so that the excellent wear resistance of the upper bearing bush and the lower bearing bush is utilized to improve the service life of the swash plate seat 1 and the swash plate 2. The upper and lower bearing bushes can be replaced after being worn, so that the requirements of the swash plate assembly friction pair can be met, and the manufacturing cost is saved.

The invention has the advantages that:

the upper bearing bush and the lower bearing bush, namely the upper bearing bush 4 and the lower bearing bush 3, are all made of bearing steel, so that the requirement of a friction pair of the swash plate assembly can be met, and the wear resistance of the swash plate assembly is improved.

By installing the upper bearing bush and the lower bearing bush, the traditional friction joint surface can be prevented from being subjected to the process treatments such as nitriding, copper sintering, laser quenching and the like, the production cost and the processing time are reduced, and the production period is shortened.

The reusability of the swash plate assembly can be ensured by replacing the upper bearing bush and the lower bearing bush, and the problem that the whole swash plate assembly is scrapped due to abrasion in the prior art is solved.

In order to facilitate the snap-fit mounting of the bearing shell, in the embodiment, as shown in fig. 5 and 9, a lower bearing shell slot 11b for the snap-fit mounting of the lower bearing shell 3 is formed on the inner arc supporting surface 11a along the entire arc length of the inner arc supporting surface 11a, and an upper bearing shell slot 21b for the snap-fit mounting of the upper bearing shell 4 is formed on the outer arc supporting surface 21a along the entire arc length of the outer arc supporting surface 21 a. The width of the lower bearing bush clamping groove 11b is slightly larger than the width of the lower bearing bush 3, so that the lower bearing bush 3 can be clamped into the lower bearing bush clamping groove 11b, and the lower bearing bush 3 is prevented from moving left and right under the limitation of the lower bearing bush clamping groove 11 b. Similarly, the width of the upper bearing bush slot 21b is slightly larger than that of the upper bearing bush 4, so that the upper bearing bush 4 can be clamped into the upper bearing bush slot 21b, and the upper bearing bush 4 is prevented from moving left and right under the limitation of the upper bearing bush slot 21 b.

In the embodiment, in order to prevent the lower bearing bush 3 and the upper bearing bush 4 from moving in the circumferential direction, the invention further comprises positioning pin holes K1 for inserting the positioning pins 5 respectively machined in the center of the inner arc supporting surface 11a and the center of the outer arc supporting surface 21a, and through holes K2 for positioning the positioning pins 5 respectively machined in the center of the lower bearing bush 3 and the center of the upper bearing bush 4. As shown in fig. 2, the lower shell 3 is fixedly snap-fitted into the lower shell snap groove 11b of the inner arc support surface 11a via the positioning pin 5, and the upper shell 4 is fixedly snap-fitted into the upper shell snap groove 21b of the outer arc support surface 21a via the positioning pin 5. The invention can limit the upper and lower bearing bushes by using the positioning pin 5 so as to prevent the upper and lower bearing bushes from moving in the circumferential direction.

In the embodiment, as can be seen from fig. 2, the depth of the lower bearing bush clamping groove 11b is smaller than the thickness of the lower bearing bush 3, and the depth of the upper bearing bush clamping groove 21b is smaller than the thickness of the upper bearing bush 4, so that friction only occurs on the upper and lower bearing bushes in the using process, and the swash plate seat 1 and the swash plate 2 are not abraded.

In order to ensure the lubrication between the upper bearing bush and the lower bearing bush, a lubricating oil passage d1 for communicating lubricating oil is processed on the swash plate seat 1 of the invention, a lubricating oil outlet d2 for connecting the lubricating oil passage d1 is drilled on the inner arc supporting surface 11a, and a lubricating oil hole is processed on the lower bearing bush 3 at the position corresponding to the lubricating oil outlet d2 and communicated with the lubricating oil outlet d2 so as to provide lubricating oil for the friction surface between the upper bearing bush and the lower bearing bush.

In order to effectively increase the formation of oil films of the upper and lower bearing bushes and ensure flexible variation and good wear resistance of the upper and lower bearing bushes, as shown in fig. 2, 11 and 14, the friction contact surface of the lower bearing bush 3 and the upper bearing bush 4 is designed into a concave arc surface 3 a; the friction contact surface of the upper bearing shell 4 and the lower bearing shell 3 is designed into a convex arc surface 4a matched with the concave arc surface 3a of the lower bearing shell 3.

In the embodiment, a protective edge 12 for preventing the swash plate 2 from moving side to side is formed on the end surface of the swash plate base 1 of the present invention outside the support projection 11.

The arc length of the upper bearing shell 4 is larger than that of the lower bearing shell 3, and the rotating stroke of the swash plate 2 is within the effective arc length of the lower bearing shell 3.

The swash plate 2 is provided with a thrust plate 6. The maximum arc length of the upper shell 4 cannot interfere with the thrust plate 6.

While the preferred embodiments of the present invention have been illustrated, various changes and modifications may be made by one skilled in the art without departing from the scope of the invention.