KR20000025161A - Uniform velocity joint having multiple links - Google Patents

Abstract

PURPOSE: A multiple-linked uniform velocity joint having a simple structure is provided to deliver the rotation of an input shaft to an output shaft at a uniform speed, to adjust the crossed angular degrees of the input shaft and the output shaft up to 90 angular degrees and to adjust the number of links according to the size of the driving torques. CONSTITUTION: A rotating ball(35) of a first shaft(10) rotates in four directions in a holder(45) of a second shaft(20) if the force in the direction of Z axis is given to the rear end of the first shaft. Therefore, the first shaft rotates in the direction of the force of the Z axis. Then, link members(51,52) of the rotating ball connected to the first shaft move in the direction of the force of the Z axis, and the center of another rotating ball(30) of the rotating ball link members and the center of the rotating ball of the first shaft are placed in straight line. And the straight line of the rotating balls is placed on the line dividing the orthogonal axes of the first and the second shafts. Thereby, the first and the second shafts obtain 2 in the degree of freedom of freely rotating toward Y and Z axes.

Description

Multiple Link Constant Velocity Joint

The present invention relates to a constant velocity joint, in particular, to transmit the rotation of the input shaft to the output shaft at the same speed, to adjust the crossing angle between the input shaft and the output shaft to about 90 degrees, the number of links according to the size of the drive torque A multilink constant velocity joint is provided.

For example, it is necessary to transmit the rotation of the input shaft to the output shaft at the same speed regardless of the variation of the crossing angle between the input shaft and the output shaft at the joint where the intersection angle of the two axes changes, such as the part of the propulsion shaft of the car connected to the wheel. .

In general, when the vehicle travels on uneven roads, since the wheels move up and down, an angle change occurs between the wheels and the propulsion shaft.

With reference to Figures 1 and 2, a conventional constant velocity joint will be described schematically.

Conventional constant velocity joints include an input shaft (1) and an output shaft (2) rotating with a driving force generated by an engine of a vehicle, a burfield joint boot (3) for preventing the leakage of grease, and the input shaft (1) and an output shaft (2). It consists of the burfield joint 5 and the dust cover 7 which adjust the crossing angle of.

As shown in FIGS. 1 and 2, the burfield joint 5 comprises a casing 11 to which the output shaft 2 is coupled.

The outer ring 12 having a predetermined depth is formed on the inner surface of the casing 11, and six guide grooves 13 are formed in the outer ring 12 at equal intervals.

The inner surface of the outer ring 12 is formed into a concave spherical surface.

The inner ring 14 is inserted into the outer ring 12 formed as described above. The outer surface of the inner ring 14 is formed in a convex spherical shape, and a guide groove corresponding to the guide groove 13 of the outer ring 12 thereon. (15) is formed.

Each ball 16 is inserted into a space formed by the guide groove 13 of the outer ring 12 and the guide groove 15 of the inner ring 14 formed as described above. In addition, a cage in which six holes 17 are formed at equal intervals between the outer ring 12 and the inner ring 14 so that the ball 16 can be always supported at a predetermined position of the guide grooves 13 and 15. (18) is inserted.

That is, a ball 16 is inserted into the holes of the guide grooves 13 and 15 and the cage 18, and the ball 16 rotates while sliding along the guide grooves 13 and 15.

In addition, a hole 19 is formed in the center of the inner ring 14 to be connected to one end of the input shaft 1.

In the following, an operation relationship of a conventional constant velocity joint configured as described above will be described.

The ball 16 is always in a constant position in the guide grooves 13 and 15 by the cage 18 when the input shaft 1 and the output shaft 2 are in a straight line, but the input shaft 1 and the output shaft 2 If the axial direction of the cross-connected to each other, it slides along the guide grooves (13, 15).

That is, the power of the input shaft 1 is transmitted to the output shaft 2 through six balls 16 positioned between the inner ring 14 and the outer ring 12 of the burfield joint 5.

At this time, the inner ring 14 in contact with the ball 16 is in contact with the ball 16 at one point, the outer ring 12 is also in contact with one point of the ball 16.

As such, the rotational force of the inner ring 14 is transmitted to the ball 16 at the contact point between the inner ring 14 and the ball 16, and the rotational force transmitted to the ball 16 is in contact with the outer ring 12 and the ball 16. It is transmitted to the outer ring 12 through the contact point.

As described above, the conventional constant velocity joint has a portion in contact with the ball 16 and guide grooves 13 and 15 in which the ball 16 slides, and thus, there is a difficulty in processing and a complicated structure. .

In addition, the conventional constant velocity joint has a maximum angle of 46.5 between the input shaft 1 and the output shaft 2 which can transmit power while maintaining a stable state without the ball 16 being separated between the guide grooves 13 and 15. Therefore, it is disadvantageous that it can be used only when the crossing angle between the input shaft 1 and the output shaft 2 is 46.5 degrees or less.

The present invention has been made to solve the problems of the prior art as described above, it is possible to maximize the cross-angle range between the input shaft and the output shaft, the object is to provide a multi-link constant velocity joint with a simple structure.

1 is a schematic view for explaining the components of the constant velocity joint according to the prior art,

2 is a detailed view for explaining the components of the burfield joint of the constant velocity joint shown in FIG.

3 is a front view of a portion cut away to explain the components of the multiple link constant velocity joint according to an embodiment of the present invention;

4 is a plan view of the plurality of link constant velocity joints shown in FIG.

FIG. 5 is a front view illustrating an operating state of the plurality of link constant velocity joints illustrated in FIG. 3;

FIG. 6 is a perspective view of the multiple link constant velocity joint shown in FIG. 3. FIG.

Explanation of symbols on the main parts of the drawings

10: first axis 20: second axis

30, 35: rotating holes 40, 45: holder

51, 52, 53, 54: link member 70: rotary pin

75: connector

According to the present invention for achieving the above object, in the constant velocity joint for transmitting the rotation of the input shaft to the output shaft at the same speed,

It includes a first and a second shaft which is an input shaft and an output shaft, and a plurality of link members for connecting the first and second shafts,

The link member is rotatably coupled to one end is rotatably coupled to the first shaft and the other end is a rotary ball link member each formed with a spherical rotary sphere, and one end is rotatable to the second axis To each other is coupled to the other end is provided with a holder link member formed with a holder for receiving each of the rotary sphere so that the rotary sphere is free to rotate in the vertical, left, and right directions,

A spherical rotary sphere is formed at one end of the first shaft, and a holder for accommodating the rotary sphere is formed at one end of the second shaft so that the rotary sphere can rotate freely in up, down, left and right directions. ,

The first shaft and the second shaft are provided with a plurality of link constant velocity joints, characterized in that a plurality of connection holes for adjusting the engagement position of the link member.

EXAMPLE

Hereinafter, with reference to the accompanying drawings a preferred embodiment of a multi-link constant velocity joint according to the present invention will be described in detail.

In the drawings, FIG. 3 is a front view of a portion cut away to explain the components of the multi-link constant velocity joint according to an embodiment of the present invention, and FIG. 4 is a plan view of the multi-link constant velocity joint shown in FIG.

As shown in Figures 3 and 4, the multiple link constant velocity joint of the present invention has a first shaft 10, which serves as an input shaft, and a second shaft 20, which serves as an output shaft and is coupled to the first shaft 10. And four link members 51, 52, 53, and 54 for connecting the first shaft 10 and the second shaft 20 to each other.

Here, the rotary tool 35 is integrally formed at one end of the first shaft 10. At this time, the rotary ball 35 extends on the first shaft 10 in a neck shape. In this way, the rotary ball 35 is integrated to have a neck shape with respect to the first shaft 10. When the rotary ball 35 rotates in the holder 45, the holder 45 and the first shaft 10 are rotated. This is to minimize the interference between.

In addition, one end of the second shaft 20 can accommodate the rotary hole 35 of the first shaft 10, in which the holder 45 rotatable the rotary hole 35 is formed integrally. It is. At this time, the holder 45 extends on the second shaft 20 in a neck shape.

The first shaft 10 and the second shaft 20 are coupled to each other by the rotating sphere 35 of the first shaft 10 and the holder 45 of the second shaft 20 configured as described above. It becomes rotatable.

In addition, a plurality of connection holes 75 are formed in the first shaft 10 and the second shaft 20 at predetermined intervals along the shaft. The connection hole 75 thus formed is used to adjust the engagement position of the link members 51, 52, 53, 54 coupled to the first shaft 10 and the second shaft 20, respectively.

In addition, the link members 51, 52, 53, and 54 connecting the first shaft 10 and the second shaft 20 may include the rotary ball link members 51 and 52 having the rotary holes 30 formed at one end thereof. ) And holder link members 53 and 54 having a holder 40 formed at one end thereof. At this time, the holder 40 can accommodate the rotary ball 30, the rotary ball 30 is formed therein to be rotatable. The rotary sphere link members 51 and 52 and the holder link members 53 and 54 by the rotary sphere 30 of the rotary sphere link members 51 and 52 and the holder 40 of the holder link members 53 and 54 thus formed. ) Are coupled to each other, so that they can rotate up, down, left and right.

The other end of the link member 51, 52, 53, 54 is provided with a groove having a predetermined length to accommodate the first shaft 10 or the second shaft 20, and the rotary ball link member The first shaft 10 is inserted into the grooves of the 51 and 52, and the second shaft 20 is inserted into the grooves of the holder link members 53 and 54 so that the first and second are rotated by the rotation pin 70. It is rotatably coupled to the connecting hole 75 of the shaft (10, 20).

As described above, when the first shaft 10 and the second shaft 20 are coupled to each other, the center of the rotary sphere 30 of the rotary sphere link members (51, 52) and the rotary sphere of the first shaft (10) The center of (35) is straight. That is, the link members 51 and 53 and the link members 52 and 54 are symmetrically disposed based on the center lines of the first shaft 10 and the second shaft 20.

In the following, the operation relationship of the multiple link constant velocity joint of the present invention configured as described above will be described.

5 is a front view illustrating an operating state of a plurality of link constant velocity joints, and FIG. 6 is a perspective view of a plurality of link constant velocity joints.

In order to use a plurality of link constant velocity joints as a connecting member of two axes, first, an intersection angle of the first axis 10 and the second axis 20 in the axial direction is set. And, in order to match the set crossing angle, when the force in the Y-axis direction is applied to the rear end of the first shaft 10, the rotary tool 35 formed in the front end of the first shaft 10 is a rotary ball 35 Since the holder 45 accommodated is moved in the direction opposite to the Y-axis force, the tip portion on which the holder 45 of the second shaft 20 is formed moves in the direction opposite to the Y-axis force.

At the same time, the rotary ball link members 51 and 52 connected to the first shaft 10 move in the direction of the Y-axis force, and each holder accommodates the rotary balls 30 of the respective rotary ball link members 51 and 52. (40) It also moves in the direction of the Y axis force. At this time, since the force in the Y-axis direction of the holder link members 53 and 54 extending to the holder 40 is transmitted to the second shaft 20, the rear end of the second shaft 20 is in the direction of the Y-axis force. Move. That is, the front end of the second shaft 20 moves in the direction opposite to the Y-axis force, and the rear end moves in the direction of the Y-axis force.

Therefore, the rear end of the second shaft 20 also rotates by the same angle by the angle in which the first shaft 10 is rotated by the force in the Y-axis direction applied to the rear end of the first shaft 10. At this time, the center of the rotary sphere 30 of the rotary ball link members (51, 52) and the center of the rotary sphere (35) of the first shaft 10 is a straight line, the straight line of the center of the rotary sphere (30, 35) Bisects the intersection angle 2α of the first axis 10 and the second axis 20.

Next, let's take a look at the operating relationship when the force is applied in Z direction.

When the force in the Z-axis direction is applied to the rear end of the first shaft 10, the rotary hole 35 of the first shaft 10 is rotated in the up, down, left and right directions in the holder 45 of the second axis, Z-axis force The first axis 10 rotates in the direction of. Then, the rotating ball link members 51 and 52 connected to the first shaft 10 also move in the direction of the Z-axis force, and the rotating ball 30 extending from the rotating ball link members 51 and 52 is connected to the holder ( Since it is rotatable within 40, the rotary ball link members 51, 52 also rotate along the first axis 10 in the direction of the Z axis force.

At this time, the center of the rotary sphere 30 of the rotary ball link members (51, 52) and the center of the rotary sphere (35) of the first shaft 10 is a straight line, the straight line of the center of the rotary sphere (30, 35) Is located on a line bisecting the intersection angle between the first axis 10 and the second axis 20.

Thus, the first axis 10 and the second axis 20 have two degrees of freedom to rotate freely in the Y, Z axis.

Next, a description will be given when the driving force is applied to the first shaft 10.

The straight line connecting the rotating spheres 30 and 35 according to the driving rotation of the first shaft 10 rotates on the YZ plane, which is generated by the angle between the first shaft 10 and the second shaft 20 during rotation. The difference in the rotational speed generated by the difference in the angular velocity, that is, the difference between the inner angle 2α and the outer angle 360 ° 2α between the two axes 10 and 20 is determined by the rotational holes 30, respectively. The rotation of 35 and the change in the distance between the respective rotary holes 30 and 35 are corrected to constantly transmit the constant rotational speed of the first shaft 10 to the second shaft 20.

In addition, the first shaft 10 and the second shaft 20, which does not include the rotary hole 35 of the first shaft 10 and the holder 45 of the second shaft 20, are the link members 51 and 52. , 53, and 54, the first axis 10 and the second axis 20 have two degrees of freedom in which the Y and Z axes rotate freely.

And even if two or more pairs of link members are further connected to the first and second axes 10 and 20, the first and second axes 10 and 20 have two degrees of freedom in which they are free to rotate in the Y and Z axes. Have

As described in detail above, the multiple link constant velocity joint of the present invention transmits the rotation of the input shaft to the output shaft at the same speed through an operation in which the rotary tool rotates in the holder according to the angle between the two axes. The crossing angle between the output shaft can be adjusted up to about 90 degrees, it can be adjusted according to the magnitude of the drive torque, and there is an advantage in that it is simple in structure.

Although the technical idea of the plural-link constant velocity joint of the present invention has been described above with the accompanying drawings, this is illustrative of the best embodiment of the present invention and is not intended to limit the present invention. In addition, it is obvious that any person skilled in the art can make various modifications and imitations without departing from the scope of the technical idea of the present invention.

Claims (3)

In the constant velocity joint which transmits the rotation of the input shaft to the output shaft at the same speed, And a plurality of link members 51, 52, 53, and 54 connecting the first and second shafts 10 and 20, which are input shafts and output shafts, and the first and second shafts 10 and 20, respectively. , One end of the link member 51, 52, 53, 54 is rotatably coupled to one end is rotatably coupled to the first shaft 10, the other end is formed with a spherical rotary sphere 30, respectively The link members 51 and 52 and one end thereof are rotatably coupled to the second shaft 20, respectively, and the other end thereof rotates so that the rotating tool 30 is free to rotate up, down, left and right. And a holder link member (53, 54) having a holder (40) for receiving the sphere (30), respectively. The spherical rotary tool 35 is formed at one end of the first shaft 10, and the rotary tool 35 at one end of the second shaft 20. A plurality of links constant velocity joint, characterized in that the holder (45) for receiving the rotating sphere (35) is formed so that the rotation is free to rotate in the vertical, horizontal, left and right directions. According to claim 1 or 2, The first shaft 10 and the second shaft 20, a plurality of connection holes 75 for adjusting the coupling position of the link members (51, 52, 53, 54) A plurality of link constant velocity joints are formed.