CN216343519U - Fixed end ball cage type constant velocity universal joint with high efficiency and long service life - Google Patents
Fixed end ball cage type constant velocity universal joint with high efficiency and long service life Download PDFInfo
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- CN216343519U CN216343519U CN202121984865.8U CN202121984865U CN216343519U CN 216343519 U CN216343519 U CN 216343519U CN 202121984865 U CN202121984865 U CN 202121984865U CN 216343519 U CN216343519 U CN 216343519U
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Abstract
The utility model discloses a fixed end ball cage type constant velocity universal joint with high efficiency and long service life, which relates to the field of constant velocity universal joints and comprises a bell-shaped shell, a star-shaped sleeve, a plurality of balls and a retainer; the bell-shaped shell comprises a mounting end and an opening end, the opening end of the bell-shaped shell is provided with an inner spherical surface of the bell-shaped shell, and the inner spherical surface of the bell-shaped shell is provided with a plurality of inner spherical surfaces; the star-shaped sleeve is arranged in the spherical surface in the bell-shaped shell; an outer lane surface is arranged on the outer spherical surface of the star-shaped sleeve, and the outer lane surface is matched with the inner lane surface to form a group of lanes; the ball path comprises a plurality of first ball paths and second ball paths; the plurality of balls are clamped in the ball channel; and the retainer is used for retaining the balls. The utility model has the beneficial effects that: the universal joint uses two ball paths, and the shapes of the ball paths are different from each other, so that the axial force generated by the whole universal joint to the balls is reduced in a working swing angle, the spherical friction and abrasion of the retainer, the bell-shaped shell and the star-shaped sleeve are further reduced, the heat is reduced, the transmission efficiency is improved, and the service life is prolonged.
Description
Technical Field
The utility model relates to the field of constant velocity universal joints, in particular to a fixed end ball cage type constant velocity universal joint with high efficiency and long service life.
Background
As shown in figure 1, in the fixed end rzeppa universal joint of the prior art, in the range of the working pivot angle, there is a spread angle (α 0) between the inner raceway surface (1-4) of the outer race (1 ') and the outer raceway surface (2-2) of the inner race (2 '), which has an axial force acting on the balls (3 ') to push the outer spherical surface (4-1) of the cage and the inner spherical surface (1-3) of the outer race, thereby bringing the outer spherical surface (2-1) of the inner race and the inner spherical surface (4-2) of the cage into contact. This results in severe frictional wear between the spherical surfaces at these locations during operation, which is detrimental to the low heat generation and high efficiency of the fixed end rzeppa joint.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects in the prior art, provides a fixed end ball cage type constant velocity universal joint with high efficiency and long service life, and solves the problems that the inner spherical surface of a bell-shaped shell and the outer spherical surface of a retainer are caused by axial force, the friction and abrasion of the outer spherical surface of a star sleeve and the inner spherical surface of the retainer cause large heat generation of a ball cage and low transmission efficiency of the conventional fixed end ball cage type constant velocity universal joint in a working pivot angle range.
The purpose of the utility model is achieved by the following technical scheme: a high efficiency long life fixed end birfield constant velocity joint comprising:
the outer shell comprises a mounting end and an opening end axially opposite to the mounting end about an axis L, an inner spherical surface of the outer shell is arranged at the opening end of the outer shell, and a plurality of inner spherical surfaces are arranged on the inner spherical surface of the outer shell along the axial direction of the outer shell;
the star sleeve is arranged in the spherical surface in the outer shell and is used for externally connecting the input shaft; the outer spherical surface of the star-shaped sleeve is provided with outer spherical surfaces with the same number as the inner spherical surfaces along the axial direction of the bell-shaped shell, and each outer spherical surface is matched with the corresponding inner spherical surface to form a group of ball tracks; the ball path comprises a plurality of first ball paths and second ball paths which are alternately distributed along the circumference of the inner spherical surface of the bell-shaped shell;
each ball is clamped in one group of ball channels and used for transmitting torque; and
the retainer is arranged between the inner spherical surface of the bell-shaped shell and the outer spherical surface of the star sleeve and used for retaining the balls; the retainer is provided with a retainer outer spherical surface matched with the inner spherical surface of the bell-shaped shell and a retainer inner spherical surface matched with the outer spherical surface of the star sleeve;
the center O of the ball cage is positioned on the axis L, the inner spherical surface and the outer spherical surface are symmetrical about a central plane EM where the center O of the ball cage is positioned, and the center O2 of the inner spherical surface and the center O1 of the outer spherical surface are respectively arranged on two sides of the center O of the ball cage;
when the ball moves from the central plane EM to the mounting end, the opening angle alpha of the first lane faces the opening end, the angle of the first lane is greatly reduced, and the direction is kept unchanged; meanwhile, the opening angle beta of the second fairway is initially 0 degree, then the second fairway is unfolded towards the direction of the installation end, and is firstly increased and then reduced to 0 degree, and then the second fairway is unfolded towards the opening end.
As a further technical scheme, the centers of the inner spherical surface of the bell-shaped shell, the outer spherical surface of the inner star sleeve, the outer spherical surface of the retainer and the inner spherical surface of the retainer are all coincided with the center O of the ball cage.
As a further technical scheme, the inner lane surface of the first lane is formed by connecting at least two arcs, or is formed by connecting one arc and at least one straight line segment; the inner lane surface of the second lane is formed by connecting at least three circular arcs and at least one straight line section.
As a further technical scheme, the inner lane surface of the first lane is formed by connecting an arc a and an arc b; the direction of the arc a is opposite to that of the arc b, and the joint of the arc a and the arc b is a tangent point.
As a further technical scheme, the inner lane surface of the second lane is formed by sequentially connecting an arc c, an arc d, a straight line segment a, a straight line segment b, an arc e, an arc f and an arc g; the directions of the arc c and the arc d are opposite, the directions of the arc e and the arc f are opposite, and the directions of the arc f and the arc g are the same; and the joints between the adjacent circular arcs and the circular arcs and between the adjacent circular arcs and the straight line sections are tangent points.
As a further technical scheme, the inner lane surface of the second lane is formed by sequentially connecting an arc h, an arc i, a straight line segment c and an arc j; the directions of the arc h and the arc i are opposite, and the directions of the arc i and the arc j are the same; the joints between the adjacent circular arcs and the straight line sections are tangent points
As a preferable technical scheme, four groups of first ball tracks and four groups of second ball tracks are respectively arranged.
The utility model has the beneficial effects that: the universal joint uses two ball paths, and the shapes of the ball paths are different from each other, so that the axial force generated by the whole universal joint to the balls is reduced in a working swing angle, the spherical friction and abrasion of the retainer, the bell-shaped shell and the star-shaped sleeve are further reduced, the heat is reduced, the transmission efficiency is improved, and the service life is prolonged.
Drawings
Fig. 1 is a schematic front view of a prior art.
Fig. 2 is a schematic side view of a prior art structure.
FIG. 3 is a schematic side view of the present invention.
Fig. 4 is a sectional view a-a of fig. 3.
Fig. 5 is a sectional view B-B of fig. 3.
Fig. 6 is a schematic outline view of the first lane in embodiments 1 and 2 of the present invention.
Fig. 7 is a schematic outline view of a second lane in embodiment 1 of the present invention.
Fig. 8 is a schematic outline view of a second lane in embodiment 2 of the present invention.
Fig. 9 is a graph showing the variation of the opening angle of the fairway according to the swing angle of the universal joint in the embodiments 1 and 2 of the present invention.
Description of reference numerals: the ball-rolling bearing comprises an outer bell shell 1, a mounting end 1-1, an opening end 1-2, an inner spherical surface 1-3 of the outer bell shell, an inner spherical surface 1-4, a star-shaped sleeve 2, an outer spherical surface 2-1 of the star-shaped sleeve, an outer spherical surface 2-2, balls 3, a retainer 4, an outer spherical surface 4-1 of the retainer, an inner spherical surface 4-2 of the retainer, a first ball path 5 and a second ball path 6.
Detailed Description
The utility model will be described in detail below with reference to the following drawings:
example 1: as shown in the accompanying drawings, a fixed end rzeppa constant velocity joint having high efficiency and long life comprises an outer race 1, an inner race 2, a plurality of balls 3, and a cage 4.
Referring to fig. 4, the outer shell 1 includes a mounting end 1-1 and an open end 1-2 axially opposite to the mounting end 1-1 with respect to an axis L (i.e., a central axis of the outer shell 1), an inner spherical surface 1-3 of the outer shell is disposed at the open end 1-2 of the outer shell 1, and a plurality of inner spherical surfaces 1-4 are formed on the inner spherical surface 1-3 of the outer shell along the axial direction of the outer shell 1.
The star-shaped sleeve 2 is arranged in the inner spherical surface 1-3 of the outer bell-shaped shell and is used for externally connecting an input shaft; the outer spherical surface 2-1 of the inner race is provided with outer spherical surfaces 2-2 with the same number as the inner spherical surfaces 1-4 along the axial direction of the outer spherical surface 1 of the inner race, and each outer spherical surface 2-2 is matched with the corresponding inner spherical surface 1-4 to form a group of ball tracks; the ball tracks comprise a plurality of first ball tracks 5 and second ball tracks 6 which are alternately distributed along the circumference of the inner spherical surface 1-3 of the outer bell-shaped shell, in the embodiment, four first ball tracks 5 and four second ball tracks 6 are preferred, and other numbers, such as three groups or five groups, can be adopted.
Referring to fig. 3, a plurality of balls 3, each ball 3 being sandwiched in a set of ball tracks for transmitting torque, preferably eight balls 3 in the present embodiment, the number of which is equal to the number of ball tracks; the number of the balls 3 can be adjusted to 6, 9, 10, 12 and the like according to the number of the ball tracks.
The retainer 4 is arranged between the inner spherical surface 1-3 of the bell-shaped shell and the outer spherical surface 2-1 of the star-shaped sleeve and is used for retaining the ball 3; the retainer 4 is provided with a retainer outer spherical surface 4-1 matched with the outer spherical surface 1-3 of the bell-shaped shell and a retainer inner spherical surface 4-2 matched with the outer spherical surface 2-1 of the star-shaped sleeve.
As shown in fig. 4 and 5, the centers of the inner spherical surface 1-3 of the outer bell-shaped shell, the outer spherical surface 2-1 of the inner race, the outer spherical surface 4-1 of the retainer and the inner spherical surface 4-2 of the retainer all coincide with the center O of the ball cage (which may be non-concentric, that is, the centers of the four spherical surfaces are offset by a certain distance on the central plane EM), and the center O of the ball cage is located on the axis L; the inner lane surface 1-4 and the outer lane surface 2-2 are symmetrical about a central plane EM where the center O of the ball cage is located, the center O2 of the inner lane surface 1-4 and the center O1 of the outer lane surface 2-2 are respectively arranged on two sides of the center O of the ball cage, and the O1 and the O2 can be located on the axis L or not.
Further, as shown in fig. 6, the inner lane surface 1-4 of the first lane 5 is formed by connecting an arc aR1 and an arc bR 2; the direction of the arc aR1 is opposite to that of the arc bR2, and the connection position of the arc aR1 and the arc bR2 is a tangent point. Since the inner lane surface 1-4 and the outer lane surface 2-2 are symmetrical about the center plane EM where the center O of the cage is located, the profile of the outer lane surface 2-2 of the first lane 5 is the same as that of the inner lane surface 1-4 thereof, and thus, the description thereof is omitted. As shown in fig. 7, the inner lane surface 1-4 of the second lane 6 is formed by sequentially connecting an arc cR3, an arc dR4, a straight line aL1, a straight line bL2, an arc eR5, an arc fR6, and an arc gR 7; the directions of the arc cR3 and the arc dR4 are opposite, the directions of the arc eR5 and the arc fR6 are opposite, and the directions of the arc fR6 and the arc gR7 are the same; and the joints between the adjacent circular arcs and the circular arcs and between the adjacent circular arcs and the straight line sections are tangent points. The profile of the outer lane surface 2-2 of the second lane 6 is also the same as that of the inner lane surface 1-4 thereof and will not be described again.
Referring to fig. 4, 5 and 9, the numerical value of the opening angle is positive toward the open end 1-2. When the ball 3 moves from the central plane EM to the direction of the mounting end 1-1, the opening angle alpha of the first ball path 5 faces to the opening end 1-2, the angle is greatly reduced, and the direction is kept unchanged; meanwhile, the opening angle β of the second lane 6 is initially 0 °, and then the second lane is expanded toward the mounting end 1-1, is increased and then is reduced to 0 ° (after the opening angle β is expanded toward the mounting end 1-1 to the maximum, there is a period of plateau during which the opening angle β changes little with the swing angle), and then is expanded toward the opening end 1-2. When the working state of the working pivot angle of the universal joint is 0 degree, the opening angle beta of the second ball paths 6 is 0 degree, namely, the four second ball paths do not generate axial force, so that the axial force generated by the whole ball is reduced, and the spherical friction abrasion of the retainer, the bell-shaped shell and the star sleeve is reduced.
Example 2: the difference from embodiment 1 is that, as shown in fig. 8, the inner lane surface 1-4 of the second lane 6 is formed by sequentially connecting an arc hR3 ', an arc iR 4', a straight line segment cL1 'and an arc jR 5'; the directions of the arc hR3 'and the arc iR 4' are opposite, and the directions of the arc iR4 'and the arc jR 5' are the same; and the joints between the adjacent circular arcs and the circular arcs and between the adjacent circular arcs and the straight line sections are tangent points. The profile of the outer lane surface 2-2 of the second lane 6 is also the same as that of the inner lane surface 1-4 thereof and will not be described again.
Referring to fig. 9, when the ball 3 moves from the central plane EM toward the mounting end 1-1, the variation of the opening angle α of the first lane 5 is the same as that in embodiment 1. The opening angle β of the second lane 6 is initially 0 °, and then it is expanded toward the installation end 1-1, and then it is increased and then reduced to 0 ° (after the opening angle β is expanded toward the installation end 1-1 to the maximum, it is immediately reduced without a plateau), and then it is expanded toward the opening end 1-2. When the working state of the working pivot angle of the universal joint is 0 degree, the opening angle beta of the second ball paths 6 is 0 degree, namely, the four second ball paths do not generate axial force, so that the axial force generated by the whole ball is reduced, and the spherical friction abrasion of the retainer, the bell-shaped shell and the star sleeve is reduced.
The utility model adopts two ball paths with different contour tracks, and when the universal joint works through the control of the track of the ball paths, the opening angle of one ball path is almost unchanged, and the initial value of the opening angle of the other ball path is zero, namely, no axial force is generated, thereby reducing the integral axial force generated on the steel ball and reducing the spherical friction wear of the retainer, the bell-shaped shell and the star-shaped sleeve.
It should be understood that equivalent alterations and modifications of the technical solution and the inventive concept of the present invention by those skilled in the art should fall within the scope of the appended claims.
Claims (7)
1. The utility model provides a high efficiency long-life's stiff end rzeppa constant velocity universal joint which characterized in that: the method comprises the following steps:
the outer shell comprises an outer shell (1) and an inner shell, wherein the outer shell comprises a mounting end (1-1) and an open end (1-2) which is axially opposite to the mounting end (1-1) relative to an axis (L), the open end (1-2) of the outer shell (1) is provided with an inner spherical surface (1-3) of the outer shell, and the inner spherical surface (1-3) of the outer shell is provided with a plurality of inner spherical surfaces (1-4) along the axial direction of the outer shell (1);
the star-shaped sleeve (2) is arranged in the inner spherical surface (1-3) of the outer bell-shaped shell and is used for externally connecting an input shaft; the outer spherical surface (2-1) of the star-shaped sleeve is provided with outer spherical surfaces (2-2) with the same number as the inner spherical surfaces (1-4) along the axial direction of the outer spherical shell (1), and each outer spherical surface (2-2) is matched with the corresponding inner spherical surface (1-4) to form a group of spherical channels; the ball path comprises a plurality of first ball paths (5) and second ball paths (6) which are alternately distributed along the circumference of the inner spherical surface (1-3) of the bell-shaped shell;
the ball bearings (3) are clamped in the ball channels and used for transmitting torque; and
the retainer (4) is arranged between the inner spherical surface (1-3) of the bell-shaped shell and the outer spherical surface (2-1) of the star-shaped sleeve and is used for retaining the balls (3); the retainer (4) is provided with a retainer outer spherical surface (4-1) matched with the inner spherical surface (1-3) of the bell-shaped shell and a retainer inner spherical surface (4-2) matched with the outer spherical surface (2-1) of the star sleeve;
the center (O) of the ball cage is positioned on the axis (L), the inner spherical surface (1-4) and the outer spherical surface (2-2) are symmetrical about a central plane (EM) where the center (O) of the ball cage is positioned, and the center (O2) of the inner spherical surface (1-4) and the center (O1) of the outer spherical surface (2-2) are respectively arranged on two sides of the center (O) of the ball cage;
when the ball (3) moves from the central plane (EM) to the mounting end (1-1), the opening angle (alpha) of the first ball path (5) faces to the opening end (1-2), the angle of the first ball path is greatly reduced, and the direction is kept unchanged; meanwhile, the opening angle (beta) of the second fairway (6) is 0 degrees initially, then the second fairway is unfolded towards the direction of the mounting end (1-1), and the opening angle is increased and then reduced to 0 degrees, and then the second fairway is unfolded towards the opening end (1-2).
2. A high efficiency long life fixed end birfield constant velocity joint as claimed in claim 1 wherein: the centers of the inner spherical surface (1-3) of the bell-shaped shell, the outer spherical surface (2-1) of the star sleeve, the outer spherical surface (4-1) of the retainer and the inner spherical surface (4-2) of the retainer are all coincided with the center (O) of the ball cage.
3. A high efficiency long life fixed end birfield constant velocity joint as claimed in claim 2 wherein: the inner lane surface (1-4) of the first lane (5) is formed by connecting at least two circular arcs or a circular arc and at least one straight line segment; the inner lane surface (1-4) of the second lane is formed by connecting at least three circular arcs and at least one straight line segment.
4. A high efficiency long life fixed end birfield constant velocity joint as claimed in claim 3 wherein: the inner lane surface (1-4) of the first lane (5) is formed by connecting an arc a (R1) and an arc b (R2); the direction of the circular arc a (R1) is opposite to that of the circular arc b (R2), and the joint of the circular arc a and the circular arc b is a tangent point.
5. A high efficiency long life fixed end birfield constant velocity joint as claimed in claim 4 wherein: the inner lane surface (1-4) of the second lane (6) is formed by sequentially connecting an arc c (R3), an arc d (R4), a straight line segment a (L1), a straight line segment b (L2), an arc e (R5), an arc f (R6) and an arc g (R7); the directions of the arc c (R3) and the arc d (R4) are opposite, the directions of the arc e (R5) and the arc f (R6) are opposite, and the directions of the arc f (R6) and the arc g (R7) are the same; and the joints between the adjacent circular arcs and the circular arcs and between the adjacent circular arcs and the straight line sections are tangent points.
6. A high efficiency long life fixed end birfield constant velocity joint as claimed in claim 4 wherein: the inner lane surface (1-4) of the second lane (6) is formed by sequentially connecting an arc h (R3 '), an arc i (R4'), a straight line segment c (L1 ') and an arc j (R5'); the directions of the arc h (R3 ') and the arc i (R4') are opposite, and the directions of the arc i (R4 ') and the arc j (R5') are the same; and the joints between the adjacent circular arcs and the circular arcs and between the adjacent circular arcs and the straight line sections are tangent points.
7. A high efficiency long life fixed end rzeppa constant velocity joint according to any one of claims 1 to 6 wherein: the first ball paths (5) and the second ball paths (6) are respectively provided with four groups.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121984865.8U CN216343519U (en) | 2021-08-23 | 2021-08-23 | Fixed end ball cage type constant velocity universal joint with high efficiency and long service life |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121984865.8U CN216343519U (en) | 2021-08-23 | 2021-08-23 | Fixed end ball cage type constant velocity universal joint with high efficiency and long service life |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216343519U true CN216343519U (en) | 2022-04-19 |
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ID=81168836
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121984865.8U Active CN216343519U (en) | 2021-08-23 | 2021-08-23 | Fixed end ball cage type constant velocity universal joint with high efficiency and long service life |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216343519U (en) |
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2021
- 2021-08-23 CN CN202121984865.8U patent/CN216343519U/en active Active
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Address after: 311215 Wanxiang Road, Xiaoshan District, Hangzhou City, Zhejiang Province Patentee after: Wanxiang Qianchao Co.,Ltd. Patentee after: WANXIANG GROUP Co.,Ltd. Address before: No.1 Wanxiang Road, Xiaoshan Economic and Technological Development Zone, Hangzhou City, Zhejiang Province Patentee before: WANXIANG QIANCHAO Co.,Ltd. Patentee before: WANXIANG GROUP Co.,Ltd. |