CN115750612A - Double eccentric rzeppa constant velocity joint - Google Patents

Abstract

The invention discloses a double eccentric ball cage type constant velocity universal joint, which consists of a transmission shaft, a bell-shaped shell, a star-shaped sleeve, an eccentric retainer, a plurality of steel balls and a retainer ring, wherein the bell-shaped shell is provided with a driven shaft, the intersection points of the two shafts form a channel center when the central shaft of the transmission shaft and the central shaft of the driven shaft are not on the same straight line, the channel centers of the bell-shaped shell and the star-shaped sleeve are coincided with the channel center, the inner spherical center of the bell-shaped shell and the outer spherical center of the star-shaped sleeve are evenly distributed at two sides of the channel center, the steel balls are guided by the eccentric retainer to turn and position, and the star-shaped sleeve is connected with the transmission shaft through a spline and is axially positioned by the retainer ring. The structure has the characteristics and advantages of reasonable and compact structure, convenience and high efficiency in manufacturing, assembling and maintaining, capability of avoiding early damage, long service life, low manufacturing cost and the like.

Description

Double eccentric ball cage type constant velocity universal joint

technical field

The invention relates to a center-fixed constant velocity universal joint, more specifically, a double eccentric spherical cage type constant velocity universal joint capable of transmitting motion and torque when the main and driven shafts have angular displacement.

Background technique

In the prior art, in order to make the two shafts of the main and driven shafts be positioned at any position and any angle within the limit rotation angle range at any time, accurately and reliably. The traditional structure of the ball cage type constant velocity universal joint is through the star sleeve connected with the driving shaft (transmission shaft) and the bell shell connected with the driven shaft (working end), and the two sets of channels eccentric with the corresponding spherical surface Achieved. Therefore, the concentric spherical cage with inner and outer spherical surfaces of the universal joint can only play the function of guiding the rotation angle of the two axes. Structural analysis, performance test, and especially long-term use show that the traditional structure of the ball cage type constant velocity universal joint has the following shortcomings:

(1) The structure is complex, which brings difficulties to manufacturing and testing.

(2) It is inconvenient to disassemble, which brings inconvenience to maintenance.

(3) It is easy to be damaged in advance and has a short service life.

Contents of the invention

In order to solve the above problems, the present invention provides a double eccentric ball cage type constant velocity universal joint. , high manufacturing costs and other deficiencies and defects.

In order to achieve the above object, the present invention provides the following technical solutions: a double eccentric spherical cage type constant velocity universal joint, which is composed of a transmission shaft, a bell shell, a star sleeve, an eccentric cage, a number of steel balls and a retaining ring, The star-shaped sleeve is placed in the bell-shaped shell, and the inner wall of the bell-shaped shell is provided with bell-shaped shell grooves uniformly distributed on the circumference, and the outer wall of the star-shaped sleeve is provided with star-shaped sleeve grooves corresponding to the bell-shaped shell grooves. , the steel ball is rotatably placed between the bell-shaped casing channel and the star-shaped sleeve through the cage, the bell-shaped casing is provided with a driven shaft, the central axis of the transmission shaft and the center of the driven shaft When the axes are not on the same straight line, the intersection of the two axes forms the center of the channel, the center of the channel of the bell-shaped shell and the center of the star-shaped sleeve coincide with the center of the channel, and the center of the inner spherical surface of the bell-shaped shell and the center of the outer spherical surface of the star-shaped sleeve are evenly distributed on the On both sides of the center of the channel, the eccentric cage guides the rotation and positioning of the steel balls, and the star sleeve is connected to the drive shaft through splines and axially positioned by the retaining ring.

The distances from the center of the respective spheres of the star sleeve and the bell shell to the center of the channel are equal.

On the outer spherical surface of the star-shaped sleeve, there are the same number as the steel balls, uniformly distributed along the circumferential direction, the prime line is arc-shaped, and the section passing through the center of the channel is arc-shaped. The center of the channel deviates from the spherical surface center.

On the inner spherical surface of the bell-shaped shell, there is an inner channel with the same number as the steel balls, uniformly distributed along the circumferential direction, the prime line is arc-shaped, and the section passing through the center of the channel is arc-shaped. The center of the channel deviates from center of the sphere.

The eccentric cage has the same number of window holes as the steel balls and is evenly distributed along the circumferential direction, which is used to clamp the steel balls, guide the two-axis rotation angle and position; the inner and outer spherical centers are respectively placed on both sides of the window center; and The distance from the center of the sphere to the center of the window is equal.

The beneficial effects of the present invention are: the double eccentric spherical cage type constant velocity universal joint can not only transmit motion and torque smoothly, reliably, flexibly and accurately, but also has reasonable structure, compact structure, convenient and efficient manufacture, assembly and maintenance. , to avoid early damage, long service life, low manufacturing cost and other characteristics and advantages.

The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

Description of drawings

Fig. 1 is the longitudinal front sectional structural drawing of the specific embodiment of the present invention;

Fig. 2 is a sectional view of A-A in Fig. 1 .

Detailed ways

The following specific descriptions of the present invention are given by the examples, which are only used to further illustrate the present invention, and should not be construed as limiting the protection scope of the present invention.

As shown in Figures 1 and 2, this embodiment discloses a double eccentric spherical cage type constant velocity universal joint, which consists of a transmission shaft 1, a bell shell 2, a star sleeve 5, an eccentric cage 4, and 6 steel The ball 3 and the retaining ring 6 are composed, the star-shaped sleeve 5 is placed in the bell-shaped shell 2, the inner wall of the bell-shaped shell 2 is provided with bell-shaped shell grooves 21 uniformly distributed on the circumference, and the outer wall of the star-shaped sleeve 5 is provided with bell-shaped shell grooves. The channels 21 correspond to the star-shaped sleeve channels 51 one by one. The steel ball 3 is rotatably placed between the bell-shaped housing channel 21 and the star-shaped sleeve 5 through the cage. The bell-shaped housing 2 is provided with a driven shaft. When the central axis of the transmission shaft 1 and the central axis of the driven shaft 22 (working end shaft) are not on the same straight line, the intersection of the two axes forms the channel center 10, and the center of the bell-shaped housing channel 21 and the center of the star-shaped sleeve channel 51 are located at The channel center 10 coincides, the inner spherical center of the bell shell 2 and the outer spherical center of the star sleeve 5 are evenly distributed on both sides of the channel center 10, the eccentric cage 4 guides the steel ball rotation angle and positioning, and the star sleeve 5 passes through the spline It is connected with the transmission shaft 1 and axially positioned by the retaining ring 6 .

The distance from the center of the spherical surface of the star-shaped sleeve 5 and the bell-shaped shell 2 to the channel center 10 is equal. Through this structure, the radian of the running track of the steel ball is more balanced, ensuring smoother movement of the steel ball 3 .

On the outer spherical surface of the star-shaped sleeve 5, there are the same number as the steel balls 3, uniformly distributed along the circumferential direction, the plain line is arc-shaped, and the cross-section through the channel center 10 is an arc-shaped outer channel. The center 10 deviates from the center of the spherical surface; on the inner spherical surface of the bell-shaped shell 2, there are the same number as the steel balls 3, uniformly distributed along the circumferential direction, the prime line is arc-shaped, and the cross-section passing through the channel center 10 is arc-shaped In the inner channel, the center 10 of the channel deviates from the center of the spherical surface. Due to the structural balance of the outer spherical surface of the star sleeve 5 and the inner spherical surface of the bell-shaped shell 2, it is more convenient to disassemble the eccentric cage 4 and the steel balls, and it is also smoother for the steel balls to transmit and guide torque.

The eccentric cage 4 has the same number of windows as the steel balls 3 and is evenly distributed along the circumferential direction, and is used to clamp the steel balls 3, guide the two-axis rotation angle and position; side; and the distance from the center of the sphere to the center of the window is equal. This structure enables the steel ball to maintain a uniform arc track when rotating along the spherical surface, and it is not easy to shake.

Among them, the outer spherical surface of the star sleeve 5 coupled with the transmission shaft 1 cooperates with the inner spherical surface of the corresponding eccentric cage 4, the inner spherical surface of the bell shell 2 cooperates with the outer spherical surface of the corresponding eccentric cage 4, and the eccentric cage 4 The center of the inner spherical surface (the outer spherical surface of the star sleeve 5) and the center of the outer spherical surface (the inner spherical surface of the bell shell 2) are respectively placed on both sides of the center of the steel ball 3; The distances (eccentricities) are all equal. Through this structure, the installation of the eccentric cage 4 is more stable and reliable, and the positioning of the steel balls is more reliable.

There are generally 6 steel balls 3 for force transmission; the eccentric cage 4 also has the same number of circular window holes uniformly distributed along the circumferential direction, which are used to clamp the steel balls 3, guide the corners of the two axes and position them. This can make the steel ball more stable and reliable in motion, making the transmission of torque more efficient and stable.

Through the above technical solution, the double eccentric ball cage type constant velocity universal joint can not only transmit motion and torque smoothly, reliably, flexibly and accurately, but also has reasonable and compact structure, convenient and efficient manufacture, assembly and maintenance, and avoids It has the characteristics and advantages of early damage, long service life and low manufacturing cost.

Claims (5)

1. A double eccentric spherical cage type constant velocity universal joint, which is composed of a transmission shaft, a bell-shaped housing, a star sleeve, an eccentric cage, a number of steel balls and a retaining ring. The star sleeve is placed in the bell-shaped housing, and the bell The inner wall of the shaped shell is provided with bell-shaped shell grooves uniformly distributed around the circumference, and the outer wall of the star-shaped sleeve is provided with star-shaped sleeve grooves corresponding to the bell-shaped shell grooves one by one. The steel balls are rotatable through the cage. Placed between the bell-shaped casing channel and the star-shaped sleeve, the bell-shaped casing is provided with a driven shaft, and its feature is that when the central axis of the transmission shaft and the central axis of the driven shaft are not on the same straight line, both The axis intersections form the center of the channel, the center of the channel of the bell-shaped shell and the center of the star-shaped sleeve coincide with the center of the channel, the center of the inner spherical surface of the bell-shaped shell and the center of the outer spherical surface of the star-shaped sleeve are distributed on both sides of the channel center, by The eccentric cage guides the rotation angle and positioning of the steel ball. The star sleeve is connected with the transmission shaft through a spline and is axially positioned by the retaining ring. The outer spherical surface of the star sleeve cooperates with the inner spherical surface of the eccentric cage. The outer spherical surface of the cage is matched, and the center of the inner spherical surface and the center of the outer spherical surface of the eccentric cage are respectively placed on both sides of the center of the steel ball. 2. The double eccentric cage type constant velocity universal joint according to claim 1, characterized in that the distance from the center of the spherical surface of the star sleeve and the bell shell to the center of the channel is equal. 3. The double eccentric cage type constant velocity universal joint according to claim 1, characterized in that: on the outer spherical surface of the star sleeve, there are steel balls in the same number as the steel balls, which are evenly distributed along the circumferential direction, and the prime line is a circle Arc-shaped, the section through the center of the channel is an arc-shaped outer channel, and the center of the channel deviates from the center of the sphere. 4. The double eccentric cage type constant velocity universal joint according to claim 1, characterized in that: on the inner spherical surface of the bell-shaped shell, there are steel balls in the same number as the steel balls, which are evenly distributed along the circumferential direction, and the prime line is a circle Arc-shaped, the inner channel whose section through the center of the channel is arc-shaped, and the center of the channel deviates from the center of the spherical surface. 5. The double eccentric cage type constant velocity universal joint according to claim 4, characterized in that: the eccentric cage has the same number of steel balls and uniformly distributed window holes along the circumferential direction for clamping the steel balls, The two axes are guided and positioned; the centers of the inner and outer spherical surfaces are respectively placed on both sides of the center of the window hole; and the distance from the center of the spherical surface to the center of the window hole is equal.

Images