JP3473330B2 - Double Cardan constant velocity joint - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The double cardan type constant velocity joint according to the present invention is incorporated in, for example, a steering device of an automobile, and a rotational force applied to a steering wheel is applied to a gear box. Use to communicate. 2. Description of the Related Art A steering apparatus for a motor vehicle is configured to transmit a movement of a steering wheel to a gear box via a steering shaft, a universal joint and an intermediate shaft so as to impart a desired steering angle to the front wheels. are doing. In the case of a general steering device, since the intersection angle (joint angle) between the steering shaft and the intermediate shaft is not large, a general cardan joint (cross-shaped) is used as a universal joint for connecting these two shafts. Universal joint).
As is well known, in a general cardan joint, the transmission of rotational force becomes uneven at a given joint angle, but as long as the joint angle is small, the degree does not pose a practical problem. It has also been practiced to use two cardan joints to counteract unequal speed. However, in recent years, in some automobiles such as cab-over type automobiles, the intersection angle between the steering shaft and the intermediate shaft is often increased in order to improve collision safety. In such a case, if a general cardan joint is used, the non-uniformity of the rotational force transmission becomes so large that it cannot be ignored. Therefore,
In such a case, it is considered to use a double cardan type constant velocity joint. As a double cardan type constant velocity joint, for example, Japanese Patent Publication No. 50-21610,
What is described in 251746 gazette etc. is conventionally known. Further, for the purpose of reducing the weight and cost of the double-cardan constant velocity joint, some of the components have been studied to form a metal plate by pressing a metal plate. Description of the Prior Art FIGS. 8 to 10 show an example of a double cardan type constant velocity joint incorporating a part manufactured by such press working. The structures shown in FIGS. 8 to 10 are disclosed in Japanese Patent Application Nos. 8-202432 and 8-2196.
Similarly to the double cardan type constant velocity joint disclosed in No. 76, by devising the structure of the angle adjusting member 37, the swing circle is reduced compared to the double cardan type constant velocity joint described in each of the above publications. The structure is such that the installation space is reduced, the transmission loss at the time of transmitting the rotational force is reduced, and the durability is ensured. This double cardan constant velocity joint 1
Is an intermediate housing 2, first and second yokes 3, 4,
A first cross shaft 5 connecting the first yoke 3 and the intermediate housing 2 is provided, and a second cross shaft 6 connecting the second yoke 4 and the intermediate housing 2 is provided. Intermediate housing 2 of these
Has a pair of first support arms 7, 7 at one axial end (right end in FIGS. 8 to 9) and a pair of second support arms 8, 8 at the other axial end (left end in FIGS. 8 to 9). , Are provided in phase with each other.
Then, first support holes 9, 9 concentric with each other at the distal ends of the first support arms 7, 7, and second support holes 10, 10, 10 concentric with each other at the distal ends of the second support arms 8, 8. Are formed respectively. The first yoke 3 is provided at one axial end (left end in FIGS. 8 and 9) of a short cylindrical first connecting portion 11 to which an end of a rotating shaft 29 such as a steering shaft can be fixedly connected.
It is provided with a pair of third support arms 12,12. Further, third support holes 13, 13 concentric with each other are formed in the portions of the third support arms 12, 12 near the distal end, respectively. Further, the first connecting portion 11 is provided at an intermediate portion of the first connecting portion 14 for connecting the tips of the third support arms 12 and 12 to each other.
And a first engaging projection 15 projecting to the opposite side. The second yoke 4 is connected to one end in the axial direction of a second cylindrical connecting portion 16 which is free to connect and fix the end of another rotating shaft (not shown) such as an intermediate shaft (FIG. 8 to FIG. 8). Right end of 9)
Is provided with a pair of fourth support arms 17. Then, in the portion near the tip of each of the fourth support arms 17, 17,
Fourth support holes 18, 18 concentric with each other are formed. Further, a second engaging projection 20 is formed at an intermediate portion of the second connecting portion 19 connecting the tips of the fourth support arms 17 and 17 to the opposite side to the second connecting portion 16. ing. [0008] Of the first and second shaft portions 21 and 22 constituting the first cross shaft 5 in a state orthogonal to each other, both ends of the first shaft portion 21 are formed in the first support holes 9 and 9. on the inside,
Both ends of the second shaft portion 22 are rotatably supported inside the third support holes 13 by radial needle bearings 23, 23, respectively. On the other hand, the third and fourth shaft portions 24 constituting the second cross shaft 6 in a state orthogonal to each other,
25, both ends of the third shaft portion 24 are the second support holes 1
Both ends of the fourth shaft portion 25 are rotatably supported inside the fourth support holes 18 by radial needle bearings 23, 23, respectively. Further, the intermediate housing 2 has a support plate 26 formed by punching a metal plate such as a steel plate by a press, and punching and bending a metal plate such as a steel plate by a press. And first and second intermediate housing elements 27,28. The first intermediate housing 27 is formed by bending both ends of the flat first substrate portion 30 in the same direction at a right angle to the first substrate portion 30 so that the first support arms 7 are parallel to each other.
7 is assumed. Also, the second intermediate housing element 28
Are bent at both ends of the flat second substrate portion 31 in the same direction and at a right angle to the second substrate portion 31, thereby forming the second support arms 8 and 8 parallel to each other. The support plate 26 and the first and second intermediate housing elements 27, 2
8 is combined with a state in which the support plate 26 is sandwiched between the first and second substrate portions 30 and 31. Then, both the substrate portions 30 and 31 and the support plate 26
Bolts 35, 35 and nuts 36, which are inserted into circular through holes 34, 34 formed in portions where both ends of the
36 and further tightened, the above members 26
28 are fixedly connected to each other. Further, a circular hole 3 is formed at the center of the support plate 26.
2 is provided at the center of the first and second substrate portions 30 and 31 with circular through holes 33 and 33 having a diameter larger than the circular hole 32.
Are formed respectively. An intermediate portion 38 of the angle adjusting member 37 is rotatably supported inside the circular hole 32. The angle adjusting member 37 includes a cylindrical intermediate portion 38 and first and second engagement holes 41 and 42.
These first and second engagement holes 41 and 42 are respectively
First and second end portions connected to both end surfaces of the intermediate portion 38
At the tip of both crank portions 39 and 40, the intermediate portion 38
Eccentric with respect to this intermediate part 38 in the same direction with respect to the diametrical direction
In this state, they are formed concentrically with each other. The first engagement hole 4 formed at the tip of the first crank portion 39
1, a first engaging projection 15 provided on the first yoke 3 side ,
Second engagement hole 42 formed at the tip of second crank portion 40
Wherein the second yoke 4 side second engagement projection 20 provided on, thereby freely engaged respectively swings to. The inclination angles of the first and second yokes 3 and 4 with respect to the intermediate housing 2 based on the engagement between the first and second engagement protrusions 15 and 20 and the first and second engagement holes 41 and 42. Are matched with each other. In order to be able to rotatably support the intermediate portion 38 inside the circular hole 32, the support plate 26 is connected to the circular hole 3.
It has a two-segment structure that separates at the diameter position of 2. When the first yoke 3 is rotated by the rotation shaft 29 when the double cardan constant velocity joint 1 having the above-described configuration is used, the rotation force is applied to the first cross shaft 5 and the intermediate housing. 2. The power is transmitted to the second yoke 4 via the second cross shaft 6. The positional relationship between the first and second yokes 3 and 4 and the intermediate housing 2 changes based on the transmission of the rotational force. This change is caused by the rotation of the angle adjusting member 37 inside the intermediate housing 2. Absorb by things. The angle adjusting member 37 includes:
Although it rotates around the intermediate portion 38, it does not significantly displace in the diameter direction of the intermediate housing 2. That is, only slight movement occurs in the diameter direction due to error absorption. Therefore, the diameter of the intermediate housing 2 is sufficient as long as the rotation of the angle adjusting member 37 is allowed. For this reason, the diameter of the intermediate housing 2 is made smaller than that of the conventional structure described in each of the above publications using a sliding plate type angle adjusting member, and the swing circle of the double cardan type constant velocity joint 1 is formed. And the installation space can be reduced. Further, since the force required to rotate the angle adjusting member 37 is small, the power transmission loss at the double cardan constant velocity joint 1 is small. [0012] In the case of the double cardan type constant velocity joint 1 according to the prior invention, the support plate 26 and the first,
The two intermediate housing elements 27 and 28 are
Since the joints 5 and 35 and the nuts 36 and 36 are connected and fixed based on screwing / tightening, the following problems (1) to (5) occur. When tightening the bolts 35, 35 and the nuts 36, 36, it is necessary to suppress both of these members 35, 36 with a tool such as a spanner, so that the support plate 26 and the first and second intermediate housing elements are used. The connection and fixing work with 27 and 28 is troublesome. Since the nuts 36 protrude from the board portion 30 (31) constituting any of the intermediate housing elements 27 (28), the installation space of the intermediate housing 2 tends to increase. That is, the nuts 36, 36 and the yoke 3 (4)
In order to prevent interference with the supporting arm 7 (8), it is necessary to increase the interval between the pair of bolts 35, 35, and the intermediate housing 2 is likely to be large. Since the nuts 36 and 36 are required, the number of parts increases, and the weight increases with the parts cost. In order to lock the tool when tightening the bolts 35, 35 and the nuts 36, 36, it is necessary to provide at least one pair of planes parallel to each other for each of these members. Reducing the distance between the planes provided on 36 has a limit unlike the case of bolts 35. For this reason, the volume of the nuts 36 and the space for inserting a tool for locking the nuts 36 and 36 increase. The double cardan type constant velocity joint of the present invention has been invented in order to eliminate any such inconvenience. A double cardan type constant velocity joint according to the present invention has an intermediate housing, a first and a second yoke, and a double cardan type constant velocity joint, similarly to a conventionally known double cardan type constant velocity joint. , A first cross shaft connecting the first yoke and the intermediate housing, and a second cross shaft connecting the second yoke and the intermediate housing. The intermediate housing is provided with a pair of first support arms at one end in the axial direction and a pair of second support arms at the other end in the axial direction in the same phase. And a second support hole concentric with each other is formed at the tip of each of the second support arms. The first yoke is provided with a pair of third support arms at one end in the axial direction of the first connection portion capable of connecting and fixing the ends of the rotating shaft, and the first support portions are concentric with each other near the tip of each of the third support arms. The third support hole is formed respectively, and furthermore, a first engagement protrusion protruding on the opposite side to the first connection portion is provided at an intermediate portion of the first connection portion connecting the tips of the third support arms. It is formed. The second yoke is provided with a pair of fourth support arms at one end in the axial direction of a second connecting portion capable of connecting and fixing an end of another rotating shaft, and a portion near the tip of each of the fourth supporting arms. Fourth support holes concentric with each other are formed, and a second engagement protrusion protruding on the opposite side to the second connection portion is provided at an intermediate portion of a second connection portion connecting the tips of the fourth support arms. A part is formed. Further, among the first and second shaft portions constituting the first cross shaft in a state orthogonal to each other, both end portions of the first shaft portion are rotatably supported inside the first support hole, and Both ends of the biaxial portion are rotatably supported inside the third support hole. Further, among the third and fourth shaft portions constituting the second cross shaft in a state orthogonal to each other, both end portions of the third shaft portion are rotatably supported inside the second support hole, Both ends of the four shafts are rotatably supported inside the fourth support hole. Further, an angle adjusting member that is displaceable with respect to the intermediate housing is provided at an axial intermediate portion of the intermediate housing, and first and second engaging holes are formed at both axial end portions of the angle adjusting member. ,
They are formed in phase with each other. The first engagement projection is engaged with the first engagement hole, and the second engagement projection is engaged with the second engagement hole so as to be swingably displaceable. The inclination angles of the first and second yokes are matched with each other. [0014] In particular, at the double Cardan constant velocity joint of the present invention, the intermediate housing includes a support plate for supporting the angular alignment member freely displaceable in the central portion, the
A circular hole formed at the center of the support plate, a first intermediate housing element including the first support arm formed by pressing a metal plate; and a second intermediate support arm formed by pressing a metal plate. And a bolt that couples and fixes the first and second intermediate housing elements in a state where the support plate is sandwiched between the first and second intermediate housing elements. Consists of The screw hole into which the tip of the bolt is screwed is formed directly on one or both of the first and second intermediate housing elements. Further, the angle adjusting member has a cylindrical shape and has a circular hole.
Intermediate parts rotatably supported inside and their base ends
The first and second class
Link and the tip of both cranks
And the first and second engagement holes described above. And this
The first and second engagement holes are formed in the diameter direction of the intermediate portion.
In the same direction, eccentric to this intermediate part,
Each is formed. With the double cardan type constant velocity joint of the present invention configured as described above, the operation when transmitting the rotational force between the first yoke and the second yoke while maintaining constant velocity. Is
This is the same as the double cardan constant velocity joint according to the prior invention shown in FIGS. Therefore, according to the present invention,
In the case of the Bourcardin constant velocity joint,
When the first yoke is rotated, this rotational force
Through the shaft, the intermediate housing, and the second cross shaft,
To the workforce. Based on this torque transmission,
The positional relationship between the first and second yokes and the intermediate housing has changed.
However, this change is caused by the fact that the angle adjusting member
Absorb by rotating inside the jing. This angle
The rotation member rotates around the middle part, but the middle housing
There is no large displacement in the diameter direction of the bush. That is, the diameter
On the other hand, it moves only slightly to absorb errors. Therefore,
The diameter of the intermediate housing is equal to the rotation of the angle adjusting member.
Anything that can tolerate the roll is sufficient. For this reason, Slide
Compared to the one using a plate-type angle adjustment member
Be sure to reduce the diameter of the intermediate housing to
The swing circle of the
The installation space can be reduced. Also, rotation of the angle adjustment member
The required force is small, so double cardan type constant velocity joy
Power transmission loss at the point of contact. Furthermore , in the case of the double cardan constant velocity joint of the present invention, a screw hole for screwing the tip of the bolt is directly formed in one or both of the first and second intermediate housing elements. The nut can be omitted. As a result, there is no need to hold down the nut when tightening the bolt, and the work of connecting and fixing the support plate and the first and second intermediate housing elements can be easily performed. Further, since the nut does not protrude from any of the intermediate housing elements, the installation space for the intermediate housing can be reduced. In addition, since the nut is not required, the number of parts can be reduced, and the weight can be reduced together with the parts cost. Furthermore, planes parallel to each other for locking the tool when tightening the bolt need only be provided on the head of the bolt. Unlike the nut, the space between the flat surfaces provided on the head of the solid bolt can be made as small as possible to obtain the required tightening force. Space for tools can be reduced. 1 to 5 show a first embodiment of the present invention. A feature of the present invention is that a bolt 3 for connecting and fixing the support plate 26 constituting the intermediate housing 2 and the first and second intermediate housing elements 27 and 28 is provided.
In the structure of the portion where the tip portions of 5, 35 are screwed. Regarding the structure and operation of the other parts, see FIGS.
Since the structure is the same as the structure according to the prior invention shown in FIG. 8, the description of the equivalent parts is omitted or simplified, and the description will not be made below with the characteristic part of the present invention and the part explaining the structure shown in FIGS. The description focuses on the new structure. The support plate 2 constituting the intermediate housing 2
6 and the first and second intermediate housing elements 27 and 28, both ends of the support plate 26 and the first intermediate housing element 27
As shown in FIG. 3, bolts 35, 35 (FIGS.
The circular holes 43, 43 through which the rod portion of 2) can be inserted are formed. On the other hand, at each end of the second substrate portion 31 constituting the second intermediate housing element 28, the above-mentioned circular holes 43, 43
The screw holes 44, 44 as shown in FIG.
Is formed. In order to assemble the intermediate housing 2, the support plate 26 and the first and second intermediate housing elements 2
When connecting and fixing the supporting plates 7 and 28, the support plate 26 is sandwiched between the first and second substrate portions 30 and 31 in a sandwich shape. Then, the support plate 26 and the first substrate 3
The male screw portions formed at the tip portions of the pair of bolts 35, 35 inserted through the circular holes 43, 43 formed at both end portions of the second substrate portion 31 into the screw holes 44, 44 formed at both end portions of the second substrate portion 31. Screw together and tighten further. As described above, in the case of the double cardan type constant velocity joint according to the present invention, the screw holes 44 for screwing the tips of the bolts 35 are screwed into the second intermediate housing element 28. Are formed directly on both ends of the second substrate portion 32, so that the nuts 36, 36 required in the structure of the prior invention shown in FIGS. 8 and 9 can be omitted. As a result, the tightening operation of the bolts 35, 35 need only rotate the heads of the bolts 35, 35, and there is no need to hold down the nuts 36, 36. Accordingly, the support plate 26 and the first and second intermediate housing elements 27, 2
8 can be easily fixed. Further, when performing the above-mentioned tightening operation, it is not necessary to secure a space for inserting a tool such as a wrench for holding down the nut, so that the shape of the components such as the second intermediate housing element 28 and the second yoke 4 is not required. The degree of freedom of design is improved. Also, any of the intermediate housing elements 27, 28
Since the nut does not protrude from the nut, there is no need to consider the prevention of interference between the second yoke 4 and the nut.
Intermediate housing 2 by shortening the interval between 5, 35
And the installation space for the intermediate housing 2 can be reduced. In addition, since the nut is not required, not only the number of parts can be reduced, but also the overall length of each of the bolts 35 can be shortened, so that the weight can be reduced together with the parts cost. The planes parallel to each other for locking the tool when the bolts 35, 35 are tightened are the heads 4 of the bolts 35, 35.
It is sufficient to provide them at 5, 45. Unlike a nut, the spacing between the flat surfaces provided on the heads 45, 45 of the solid bolts 35, 35 can be made as small as possible to obtain the required tightening force. The space for inserting a tool to be locked to the heads 45 can be reduced. Further, in the illustrated example, the first and second supporting arms 7, 8 constituting the first and second intermediate housing elements 27, 28 are improved in bending stiffness, so that the first and second supporting arms 7, 8 at the time of torque transmission are improved. Regardless of the force applied from the first and second cross shafts 5 and 6,
The distance between the pair of first support arms 7, 7 and the second support arms 8, 8 facing each other is prevented from increasing. That is, at the time of torque transmission, a prying force (including a reaction force) is applied from the first and second cross shafts 5 and 6 to the first and second support arms 7 and 8. This force includes a component force in the direction of increasing the distance between the pair of first support arms 7 and 7 and the second support arms 8 facing each other. For this reason, if the bending stiffness of each of the support arms 7 and 8 is low, the distance between the distal ends of the pair of first support arms 7 and 7 and the second support arms 8 and 8 facing each other is increased, and There is a possibility that the first and third shaft portions 21 and 24 constituting the first and second cross shafts 5 and 6 may fall out of the first and second support holes 9 and 10 formed at the respective distal end portions. On the other hand, in the illustrated example, as shown in FIG. 5, the first support arms 7, 7 constituting the first intermediate housing element 27 (the second support arms 8 constituting the second intermediate housing element 28). , 8), the cross-sectional shape of the base half to which a large force is applied due to the principle of leverage is formed in a waveform to increase the cross-sectional coefficient of the base half of each of the first support arms 7, 7. . Therefore, regardless of the above-mentioned prying force, the distance between the pair of first support arms 7 and 7 and the second support arms 8 and 8 facing each other is less likely to increase, and even when transmitting a large torque. The first and third shaft portions 21 and 24 do not fall out of the first and second support holes 9 and 10. As a result, a double Cardan constant velocity joint capable of transmitting a large torque can be realized. Next, FIGS. 6 and 7 show a second example of the embodiment of the present invention. In the case of the above-described first example, circular holes 43 and 43 are formed at both ends of the first substrate portion 30 forming the first intermediate housing element 27, and both ends of the second substrate portion 31 forming the second intermediate housing element 28. Screw holes 44, 44,
Each is formed, and the two bolts 35 are inserted from the first substrate 30 toward the second substrate 31. On the other hand, in the case of this example, as shown in FIG.
(Second substrate part 3 constituting second intermediate housing element 28)
1) and a screw hole 44 at one end.
Are formed respectively. Then, of the two bolts 35, 35 for connecting and fixing the first and second intermediate housing elements 27, 28 and the support plate 26, one of the bolts 35 (the lower part in FIG. 6) is The other bolt 35 (upper side in FIG. 6) is turned to the second board 31
To the first substrate section 30 from the front. As described above, if the two bolts 35, 35 are inserted in different directions, the same components can be used for the first intermediate housing element 27 and the second intermediate housing element 28. As a result, the labor of parts processing is reduced (enhancement of mass production effect), and the labor of parts management is also reduced.
It can contribute to cost reduction of double cardan type constant velocity joint. Other configurations and operations are the same as those of the above-described first example, and thus redundant description will be omitted. Since the present invention is constructed and operates as described above, it is possible to realize a double cardan type constant velocity joint which is small, lightweight, easy to assemble and inexpensive.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side view showing a first example of an embodiment of the present invention. FIG. 2 is a side view showing a state rotated by 90 degrees from the state of FIG. 1; FIG. 3 is a view of the first intermediate housing element incorporated in the first example as viewed from the right side in FIG. 1; FIG. 4 is a view of the second intermediate housing element as viewed from the left side of FIG. 1; FIG. 5 is a view corresponding to the section AA in FIG. 1, showing only the first intermediate housing element. FIG. 6 is a view similar to FIG. 2, showing a second example of the embodiment of the present invention. FIG. 7 is a view similar to FIGS. 3 and 4, showing first and second intermediate housing elements incorporated in a second example; FIG. 8 is a partially cut-away side view showing a structure according to the prior invention as a premise of the present invention. FIG. 9 is a partially cut-away side view showing a state rotated 90 degrees from the state of FIG. 8; FIG. 10 is a perspective view of an angle adjusting member. [Description of Signs] 1 Double Cardan constant velocity joint 2 Intermediate housing 3 First yoke 4 Second yoke 5 First cross shaft 6 Second cross shaft 7 First support arm 8 Second support arm 9 First support hole 10 Two supporting holes 11 First connecting part 12 Third supporting arm 13 Third supporting hole 14 First connecting part 15 First engaging projection 16 Second connecting part 17 Fourth supporting arm 18 Fourth supporting hole 19 Second connecting part Reference Signs List 20 second engaging projection 21 first shaft 22 second shaft 23 radial needle bearing 24 third shaft 25 fourth shaft 26 support plate 27 first intermediate housing element 28 second intermediate housing element 29 rotating shaft 30 First substrate part 31 Second substrate part 32 Circular hole 33 Through hole 34 Through hole 35 Bolt 36 Nut 37 Angle adjusting member 38 Intermediate part 39 First crank part 40 Second crank part 41 First engagement hole 42 Second engagement Hole 43 Circular hole 44 Screw hole 45 Head Department

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-7-251746 (JP, A) JP-A-61-197820 (JP, A) JP-A-6-28352 (JP, U) 21610 (JP, B1) (58) Field surveyed (Int. Cl. ⁷ , DB name) F16D 3/32, 3/34

Claims (1)

(57) [Claims 1] An intermediate housing, first and second yokes,
A first cross shaft connecting the first yoke and the intermediate housing; and a second cross shaft connecting the second yoke and the intermediate housing. The intermediate housing has a pair of first support arms at one axial end. A pair of second support arms are provided at the other end in the axial direction, respectively, in the same phase, and a first support hole concentric with each other is provided at a distal end portion of each of the first support arms. The first yoke has a pair of third support arms formed at one axial end of a first coupling portion capable of coupling and fixing an end of the rotating shaft. Are provided, and third support holes concentric with each other are formed in portions near the tips of the third support arms, respectively, and further, in the intermediate portion of the first connection portion connecting the tips of the third support arms, Forming a first engagement projection protruding on the opposite side to the one coupling portion; Is provided with a pair of fourth support arms at one end in the axial direction of a second connecting portion capable of connecting and fixing another end of a rotating shaft, and a fourth support arm concentric with each other at a portion near the tip of each of the fourth support arms. A hole is formed, and a second engaging projection is formed at an intermediate portion of the second connecting portion connecting the tips of the fourth support arms to the opposite side of the second connecting portion. The first, which constitutes the first cross axis in a state orthogonal to each other,
Of the second shaft, both ends of the first shaft are rotatably supported inside the first support hole, and both ends of the second shaft are freely rotatable inside the third support hole. Third, which constitutes the second cross axis in a state orthogonal to each other,
Of the fourth shaft, both ends of the third shaft are rotatably supported inside the second support hole, and both ends of the fourth shaft are freely rotatable inside the fourth support hole. The intermediate housing is provided with an angle adjusting member which is displaceable with respect to the intermediate housing at an axially intermediate portion, and first and second engaging members are provided at both axial ends of the angle adjusting member. The mating holes are formed in the same phase with each other, and the first engaging protrusion is swingably displaceable to the first engaging hole, and the second engaging protrusion is swingable to the second engaging hole. In the double cardan type constant velocity joint in which the inclination angles of the first and second yokes with respect to the intermediate housing are matched with each other, the intermediate housing is capable of displacing the angle adjusting member at the center. Support plate, and the center of this support plate
A first intermediate housing element formed by pressing a metal plate and a metal plate, including the first support arm, and a second intermediate housing including a second support arm formed by pressing a metal plate. Element, these first, the two intermediate housing elements between the first and second intermediate housing elements in a state of sandwiching the support plate in a sandwich between the bolts that are fixed to each other, The screw hole for screwing the tip of this bolt is the first,
Formed directly on one or both of the second intermediate housing elements
Cage, the angular alignment member is rotated to the inner side of the circular hole in the cylindrical
The freely supported intermediate part and each base end
First and second crank portions continuous with both end surfaces of the intermediate portion,
The above-mentioned formed at the tip of each of these two cranks
First and second engagement holes, and the first and second engagement holes
The holes are oriented in the same direction with respect to the
Being formed eccentrically to the gap
Characterized by a double cardan constant velocity joint. 2. The cross-sectional shape of the base half of the first support arm and the second support arm is formed in a waveform, and the cross-sectional coefficient of the base half of the first support arm and the second support arm is increased. Item 2. A double cardan constant velocity joint according to item 1.