Cross shaft joint
View Patent ↗A cross shaft joint tiltably coupling two shaft members each other includes: a cross shaft which includes four shaft portions and is arranged between the two shaft members; outer ring cups rotatably provided to the four shaft portions, respectively, the outer ring cups being adapted to be coupled to corresponding shaft members; and an attachment portion to which a balance weight for balancing the outer ring cups can be attached is formed on at least one of the outer ring cups.
1. A cross shaft joint tiltably coupling two shaft members to each other, the cross shaft joint comprising:
a cross shaft which includes four shaft portions and is arranged between the two shaft members; and
outer ring cups rotatably provided to the four shaft portions, respectively, at least one of the outer ring cups comprising a key portion extending in a radial direction corresponding to a key groove in one of the two shaft members and defining an attachment hole extending from an inner end of the key portion in a radial direction.
2. The cross shaft joint according to claim 1 , wherein the attachment hole has a substantially constant inside diameter, into which a bar-shaped balance weight can be inserted.
3. The cross shaft joint according to claim 1 , wherein
said key groove is formed on an end of one of the two shaft members, and
further comprising a balance weight having a bar shape that is adapted to be inserted into the attachment hole and fixed with a plug screwed into the attachment hole.
4. The joint of claim 3 , wherein said key groove is formed on an axially-facing end face of said one of the two shaft members and wherein said key groove extends in a radial direction.
5. The cross shaft joint of claim 1 , further comprising a balance weight attached to the key portion.
6. The cross shaft joint of claim 5 , wherein said balance weight is plate-shaped.
7. The cross shaft joint of claim 5 , wherein an outer surface of said balance weight is threaded.
8. The cross shaft joint of claim 1 , wherein the attachment hole comprises internal threads.
9. The cross shaft joint of claim 8 , wherein the balance weight is positioned inside the attachment hole and the balance weight is fixed by a plug screwed into the internal thread.
10. The cross shaft joint of claim 1 , further comprising the balance weight positioned within the attachment hole.
11. The cross shaft joint of claim 1 , wherein said attachment hole comprises a square hole.
12. The cross shaft joint of claim 1 , wherein the attachment hole is adapted to receive a balance weight pressed into the attachment hole.
13. The cross shaft joint of claim 1 , further comprising a balance weight received by the attachment hole of said at least one of the outer ring cups.
14. The cross shaft joint of claim 13 , wherein the balance bar comprises a bar shape.
15. The joint of claim 1 , wherein said at least one outer ring cup further comprises an axially-extending insertion hole adapted to receive a bolt for attaching said at least one outer ring cup to a screw hole in an end face of one of said two shaft members.
16. The joint of claim 1 , wherein a bottom of the attachment hole is narrower than an intermediate portion of the attachment hole.
17. The joint of claim 1 , wherein a bottom of the attachment hole is closed.
18. A cross shaft joint comprising:
a cross shaft including four shafts;
an outer ring cup rotatable on each of the four shafts, at least one of the outer ring cups comprising a key portion extending in a radial direction and defining a hole extending from an inner end of the key portion in a radial direction; and
a balance weight received by the hole of said at least one of the outer ring cups.
19. The joint of claim 18 , wherein a bottom of the attachment hole is narrower than an intermediate portion of the attachment hole.
20. The joint of claim 18 , wherein a bottom of the attachment hole is closed.