CA1139120A - Universal coupling spider bearing and yoke - Google Patents
Universal coupling spider bearing and yokeInfo
- Publication number
- CA1139120A CA1139120A CA000360868A CA360868A CA1139120A CA 1139120 A CA1139120 A CA 1139120A CA 000360868 A CA000360868 A CA 000360868A CA 360868 A CA360868 A CA 360868A CA 1139120 A CA1139120 A CA 1139120A
- Authority
- CA
- Canada
- Prior art keywords
- spider
- yoke
- pair
- tapered
- keys
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
- F16D3/16—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts
- F16D3/26—Hooke's joints or other joints with an equivalent intermediate member to which each coupling part is pivotally or slidably connected
- F16D3/38—Hooke's joints or other joints with an equivalent intermediate member to which each coupling part is pivotally or slidably connected with a single intermediate member with trunnions or bearings arranged on two axes perpendicular to one another
- F16D3/40—Hooke's joints or other joints with an equivalent intermediate member to which each coupling part is pivotally or slidably connected with a single intermediate member with trunnions or bearings arranged on two axes perpendicular to one another with intermediate member provided with two pairs of outwardly-directed trunnions on intersecting axes
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Automatic Assembly (AREA)
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
Abstract
Universal Coupling Spider Bearing and Yoke Abstract A universal coupling for joining two rotatable shafts in driving relation includes a pair of opposed yoke members connected together by a multi-legged spider element. The ends of the spider legs are journaled within bearing caps which are secured to yoke flanges by bolts. Each of the caps carry a pair of tapered keys which seat in a pair of keyways defined in the yoke flanges when the caps are fixed thereto. The keys and keyways are aligned on the bores through which the securing bolts extend.
Description
~ ~3~
Description universa] Coupling Spider Bearin~ and Yoke Technical Field This invention relates to a uni~ersal coupl-ing construction and, more particularly, to an improvedspider bearing and yoke assembly.
Background Art Articulated coup~ings for conne¢ting a pair of rotatable shafts set at an angle to one another are generally well-known. one type of articulated coupling is a universal joint which allows for rotatiorl in three planes similar to that commonly ~nown as a ~ooke's joint. Such a joint permits one shaft to be rotatively driven by a second shaft through the universal coupling even though the shafts are not co-linearly arranged or even though the angle between the respective rotational ; axes of the shafts may change as the shafts are rotated.
A universal coupling of the above-mentioned type includes a multi-legged spider. The ~ree ends of the spider legs are journaled within yokes carried by each of the rotatable shafts at their respective oppos-ed ends. Typically, spider caps are anchored to the yoke and carry bearings or bushings to reduce rotation-al friction between the spider and the yoke. In conven-tional spider and yoke couplings, the spider caps areattached to the yoke by a plurali-ty of bolts. Since the number and size of the securing bolts are usually not great enough to produce a large clamping force, driving keys are required to transmit driving torque between the rotating shafts. In the prior art, a spider cap .~, ~13~
is constructed with a single square driving key which is fitted into a slot defined in the yoke.
In applications where torque reversals do not occur, this construction is sufficient. I~owever, in those applications where ~orque reversals do occur, relative motion may take place between the spider cap and the yoke to which it is anchored because of clearances between the driving key and the slot. This relative motion can cause fretting between the mating surfaces of the parts thereby resulting first in bolt loosening due to loss of preload and then in the ultimate failure of the spider cap connection and of the coupling itself.
Disclosure of Invention ~ .
In accordance with one aspect of the invention, there is provided a spider bearing and yoke assembly for use as a universal coupling for interconnecting ~wo opposed rotatable shafts, said assembly comprising: a spider element with plural legs; a pair of yokes for mounting on opposed ends of the respective shafts, such yokes having spaced parts; a spider cap located on each of said yoke parts providing a journal for each leg of the spider element; one of said spider caps and yoke parts having a tapered key extending axially outward toward the mating one of the spider cap and yoke part; and said mating one of the spider cap and yoke part defining a tapered keyway for cooperation with said key, said tapered keyway being smaller than said tapered key to prevent said key from moving completely into said keyway; said tapered key and keyway lying parallel to an axis of the related 3Q leg of the spider element and being displaced radially outward from said axis, and securing means for moving each of said spider caps toward its respective yoke part to draw the spider cap and yoke part together into fixed axial relation, the tapers of said key and keyway being frictionally engaged to pre- vent relative radial and axial movement between the spider cap and yoke part.
.:~ 7 In another aspect of the invention, there is provided a spider bearing and yoke assembly for use as a universal coupling for interconnec~ing two rotatable shafts having opposed ends, said assembly comprising: a multi-legged spider element; a pair of yokes for mounting on theopposed ends of the respective shafts, each such yoke having spaced parts with mounting flanges extending laterally from the rotational axis of its respective shaft, said mounting flanges each having a pair of bolt-mounting bores, each bore disposed generally along a centerline spaced from the rotational axis of the respective shaft; a spider cap located on each mounting flange and each pro-viding a journal for one leq of the spider element and having two bolt-receiving bores, saia bolt receiving holes being on either side of the spider journal, and disposed generally along a centerline spaced from the spider journal and aligned with said bolt-mounting bores; a plurality of ;` bolts extending respectively through the bolt-mounting bores and into the bolt-receiving bores; a pair of tapered keys extending axially outward from and aligned one along the centerline of each respective bolt-receiving bore;
said pair of tapered keys aligning with each other along an axis radially spaced outward from the rotational axes of said shafts; and a pair of tapered keyways defined in each mounting flange aligned one along the centerline of each respective bolt-mounting bore and having a cross-sectional size smaller than that of said tapered keys, said pair of tapered keyways aligning with each other along an axis radially spaced outward from the rotational axes of said shafts, whereby tightening of the bolts aligns and secures the spider caps to the respective yoke-mounting flanges with the keys frictionally seating partially within their respective keyways for transmission of rotational torque between the shafts.
" ~3~2~
- 3a Brief Description of Drawing_ Fig. 1 is an elevatîonal view of a spider and yoke coupling constructed in accordance with the prior art;
Fig. 2 is an elevational view of a spider and yoke coupling constructed in accordance with the present invention; and Fig. 3 is a plan view of the face of one of the yokes looking in the direction of the arrows 3-3 of Fig. 2 Best ~ode for Carrying Out the Invention 10Referring to Fig. 1, a coupling, broadly : designated 10, utilizing a prior art method of construction is illustrated~ Therein, two rotatable shafts 12 and 13 have opposed Y-shaped yoke members 15 and 16, respectively.
The yoke members 15 and 16, which are oriented 90 relative to one another, are drivingly . ., ','.~, ~3~L2~
interconnected by means of a multi.-legged spider element 18. The yoke members 15 and 16 and the cross-shaped spider element 18 thereby define a universal coupling joint somewhat simiLar to a ~Iooke~s joint.
The yoke members 15 and 16 are similarly con-structed and each supports a pair of spider caps 20.
As seen with respect to the right-hand yoke member 15, one spider cap 20 is secured to each yoke mounting por-tion 22 and 23 at oppositely spaced ends of the yoke body portion 25. The mounting portions 22 and 23 extend radially outward relative to the rotational axis of the shaft 12. The spider caps 20, each having a bearing or bushing (not shown) for journaling one leg of the spider element 18, are fixed by conventional mea~, such as bolts 27, to the mounting portions 22 and 23.
As seen with reference to the spider cap 20 attached to the yolce member 16 of the left-hand shaft 13, each spider cap 20 has a hub portion 29 and a pair of laterally opposed flange portions 30 extending out-ward from the hub portion 29. For each spider cap 20, two bolts 27 extend through the mounting portion 22 and 23 and are threaded one into each spider cap flange portion 30 at opposite sides of each hub portion 29.
Each spider cap 20 also includes a single squared or rectangulax driving key 32 extending axially from the hub portion 29. The driving key 32, when the spider cap 20 is properly bolted to the yoke member 15 or 16 protrudes into a slot or keyway 33 of squared or rec-tangular configuration defined along the centerline of the yoke member 15 or 16.
~ ., Referring to Figs. 2 and 3, a coupling, broad-ly designated 40, incorporating the spider bearing and yoke assembly of the present invention is illustra-ted.
As with the prior art construction shown in Fig. 1, two rotatable shafts 42 and 43 have opposed ends 45 and 46 carrying Y-shaped yoke members 48 and 49, respectively.
The yoke members 48 and 49 are interconnected through a multi-legged spider element 51 in a manner described hereafter.
Since each of the yoke mem~ers 48 and 49 is similarl~ constructed, for purposes of brevity and clarity, only one yoke member will be described in de-tail. The yoke member 48, see Figs. 2 and 3, has a bod~
portion 53 secured by suitable means (not shown) co-linearly with the shaft 42 and has laterally extending leg portions, each designated 54 and including a moun-t-ing flange 56. Each of the mounting flanges 56 has an axially outward flat mounting surface 57 which is per-pendicular to the rotational axis of the shaft 42 and terminates in an outer abutment 59 Four spider bearing caps, all of which are designated 60 and are of similar construction, i~clude bearings or bushings (not shown) which journal the re-specti~e end of one of the four legs of the cross-shaped spider element 51, all of the spider legs being desig-nated 52. oppositely disposed legs 52 of the spider element 51 extend across each yoke member 48 or 49 and are journaled by the spider caps 60 for rotation along an axis extending therebetween. Each of the spider caps 30 60 has a body portion 61 with a flat bottom face 62 æ~;
which will be located in fronting relation with themounting surface 57 of the yoke mounting flange 56.
As seen with reference to the yoke member and spider cap associated with the rotatable shaft 43, bol-t receiving bores 64 are defined in the spider cap 60 and extend axially inward from the bottom face 62. One bore 64 is located on each lateral side of the journaling portion of the spider cap 60. Bolt-mounting bores 65 are defined through each of the mounting flanges 56 of the yoke member 49 and are spaced from the rotational axis of the sha~t 43 along a lateral line across the flange. The bolt-mounting bores 65 permit the threaded shanks of bolts 67 to be inserted through the mounting flange 56 and threaded into the spider cap 60.
A pair of tapered driving keys 70 are carried integrally by each of the spider caps 60 and extend axially outward from the bottom face 62. Each key 70 tapers axially outward and thus is wider at the base adjacent the bottom face 62 than at the outward end.
The tapered keys 70 are respectively aligned along the centerline of the bolt-receiving bores 64 spaced from the spider journal.
A pair of tapered slots or keyways 71 are de-fined in the axial outward mounting surfaces 57 of the mounting flange 56 and are aligned along the centerline of the bolt-mounting bores 65. The keyways 71 taper axially inward and thus are wider across their opening at the axial face than at their bottom. Although the keys 70 and keyways 71 are generally of similar cross~
sectional configuration and are adapted for cooperative Q`.`
engagement with one another, tha ke~ways 71 have a cross-sectional siæe which is slightly smaller than the cross-sectional size of the keys 70.
During assembly of the universal coupling 40, a spider cap 60 will be positioned on the end of each of the spider legs 52. The spider caps 60 can then be located adjacent the yoke-mounting flanges 56 with the bottom face 62 of the spider cap 60 in face-to-face relationship with the mounting surface 57 of the mount-ing flange 56 and the spider cap 60 and mounting flange56 being aligned. In this position, the keys 70 and keyways 71 will also be placed in axial alignment with the keys 70 extending axially toward the keyways 71.
Thereafter, the bolts 67 are inserted through the bolt-mounting bores 65 of the yoke member 48 or 49 and screwed into the bolt-receiving bores 64 in the spider cap 60. As the bolts 67 are tightened, the spider cap 60 will be moved toward the yoke member 48 or 49 to draw the key and keyway combination to~ether in fixed relation.
When the bolts 67 are tightened to attain a predetermined pre]oad, the keys 70 will frictionally seat within the keyways 71~ Since the keys 70 and key-ways 71 do not interfit completely, there will be a gap 73 defined between the axial mounting surface 57 of the mounting flange 56 and the bottom face 62 of the spider cap 60. The gap 73 does not adversely affect the struc-tural integrity of the connection between the yoke mem-ber and the spider cap.
~13~
The tensile force o~ the bolts 67 is trans-mitted to the parts so that a ~orce is exerted between the respective mating tapered surfaces of the key 70 and the keyway 71, thereby resulting ln a substantial frictional force. Since the spider cap 60 is fixed to the yoke member 48 or 49 against relative movement, torque is transmitted from one shaft through the key 70 and keyway 71 to the other shaft to effect rotation thereof.
Industrial Applicability It can be appreciated that the above-clescribed couplin~ having a spider-type connection may be employed in line with drive shafts, steering columns and the like, with advantageous results. The tapered design allows a full seat and thus eliminates relative motion between parts and the resultant loosening of the connection b~tween parts. The placement of the key and keyway along the bolt centerlines allows the bolts to be tightened to any desired preload without distortion of the bolts of the joined parts.
Thus, the problem o~ maintaining clearance or low tolerances is avoided. In addition, high torque and shear stresses are distributed over a-t least two key and keyway combinations rather than one.
other aspects, objects and advantages of this invention can be obtained ~rom a study o~ the drawings, the disclosure and the appended claims.
Description universa] Coupling Spider Bearin~ and Yoke Technical Field This invention relates to a uni~ersal coupl-ing construction and, more particularly, to an improvedspider bearing and yoke assembly.
Background Art Articulated coup~ings for conne¢ting a pair of rotatable shafts set at an angle to one another are generally well-known. one type of articulated coupling is a universal joint which allows for rotatiorl in three planes similar to that commonly ~nown as a ~ooke's joint. Such a joint permits one shaft to be rotatively driven by a second shaft through the universal coupling even though the shafts are not co-linearly arranged or even though the angle between the respective rotational ; axes of the shafts may change as the shafts are rotated.
A universal coupling of the above-mentioned type includes a multi-legged spider. The ~ree ends of the spider legs are journaled within yokes carried by each of the rotatable shafts at their respective oppos-ed ends. Typically, spider caps are anchored to the yoke and carry bearings or bushings to reduce rotation-al friction between the spider and the yoke. In conven-tional spider and yoke couplings, the spider caps areattached to the yoke by a plurali-ty of bolts. Since the number and size of the securing bolts are usually not great enough to produce a large clamping force, driving keys are required to transmit driving torque between the rotating shafts. In the prior art, a spider cap .~, ~13~
is constructed with a single square driving key which is fitted into a slot defined in the yoke.
In applications where torque reversals do not occur, this construction is sufficient. I~owever, in those applications where ~orque reversals do occur, relative motion may take place between the spider cap and the yoke to which it is anchored because of clearances between the driving key and the slot. This relative motion can cause fretting between the mating surfaces of the parts thereby resulting first in bolt loosening due to loss of preload and then in the ultimate failure of the spider cap connection and of the coupling itself.
Disclosure of Invention ~ .
In accordance with one aspect of the invention, there is provided a spider bearing and yoke assembly for use as a universal coupling for interconnecting ~wo opposed rotatable shafts, said assembly comprising: a spider element with plural legs; a pair of yokes for mounting on opposed ends of the respective shafts, such yokes having spaced parts; a spider cap located on each of said yoke parts providing a journal for each leg of the spider element; one of said spider caps and yoke parts having a tapered key extending axially outward toward the mating one of the spider cap and yoke part; and said mating one of the spider cap and yoke part defining a tapered keyway for cooperation with said key, said tapered keyway being smaller than said tapered key to prevent said key from moving completely into said keyway; said tapered key and keyway lying parallel to an axis of the related 3Q leg of the spider element and being displaced radially outward from said axis, and securing means for moving each of said spider caps toward its respective yoke part to draw the spider cap and yoke part together into fixed axial relation, the tapers of said key and keyway being frictionally engaged to pre- vent relative radial and axial movement between the spider cap and yoke part.
.:~ 7 In another aspect of the invention, there is provided a spider bearing and yoke assembly for use as a universal coupling for interconnec~ing two rotatable shafts having opposed ends, said assembly comprising: a multi-legged spider element; a pair of yokes for mounting on theopposed ends of the respective shafts, each such yoke having spaced parts with mounting flanges extending laterally from the rotational axis of its respective shaft, said mounting flanges each having a pair of bolt-mounting bores, each bore disposed generally along a centerline spaced from the rotational axis of the respective shaft; a spider cap located on each mounting flange and each pro-viding a journal for one leq of the spider element and having two bolt-receiving bores, saia bolt receiving holes being on either side of the spider journal, and disposed generally along a centerline spaced from the spider journal and aligned with said bolt-mounting bores; a plurality of ;` bolts extending respectively through the bolt-mounting bores and into the bolt-receiving bores; a pair of tapered keys extending axially outward from and aligned one along the centerline of each respective bolt-receiving bore;
said pair of tapered keys aligning with each other along an axis radially spaced outward from the rotational axes of said shafts; and a pair of tapered keyways defined in each mounting flange aligned one along the centerline of each respective bolt-mounting bore and having a cross-sectional size smaller than that of said tapered keys, said pair of tapered keyways aligning with each other along an axis radially spaced outward from the rotational axes of said shafts, whereby tightening of the bolts aligns and secures the spider caps to the respective yoke-mounting flanges with the keys frictionally seating partially within their respective keyways for transmission of rotational torque between the shafts.
" ~3~2~
- 3a Brief Description of Drawing_ Fig. 1 is an elevatîonal view of a spider and yoke coupling constructed in accordance with the prior art;
Fig. 2 is an elevational view of a spider and yoke coupling constructed in accordance with the present invention; and Fig. 3 is a plan view of the face of one of the yokes looking in the direction of the arrows 3-3 of Fig. 2 Best ~ode for Carrying Out the Invention 10Referring to Fig. 1, a coupling, broadly : designated 10, utilizing a prior art method of construction is illustrated~ Therein, two rotatable shafts 12 and 13 have opposed Y-shaped yoke members 15 and 16, respectively.
The yoke members 15 and 16, which are oriented 90 relative to one another, are drivingly . ., ','.~, ~3~L2~
interconnected by means of a multi.-legged spider element 18. The yoke members 15 and 16 and the cross-shaped spider element 18 thereby define a universal coupling joint somewhat simiLar to a ~Iooke~s joint.
The yoke members 15 and 16 are similarly con-structed and each supports a pair of spider caps 20.
As seen with respect to the right-hand yoke member 15, one spider cap 20 is secured to each yoke mounting por-tion 22 and 23 at oppositely spaced ends of the yoke body portion 25. The mounting portions 22 and 23 extend radially outward relative to the rotational axis of the shaft 12. The spider caps 20, each having a bearing or bushing (not shown) for journaling one leg of the spider element 18, are fixed by conventional mea~, such as bolts 27, to the mounting portions 22 and 23.
As seen with reference to the spider cap 20 attached to the yolce member 16 of the left-hand shaft 13, each spider cap 20 has a hub portion 29 and a pair of laterally opposed flange portions 30 extending out-ward from the hub portion 29. For each spider cap 20, two bolts 27 extend through the mounting portion 22 and 23 and are threaded one into each spider cap flange portion 30 at opposite sides of each hub portion 29.
Each spider cap 20 also includes a single squared or rectangulax driving key 32 extending axially from the hub portion 29. The driving key 32, when the spider cap 20 is properly bolted to the yoke member 15 or 16 protrudes into a slot or keyway 33 of squared or rec-tangular configuration defined along the centerline of the yoke member 15 or 16.
~ ., Referring to Figs. 2 and 3, a coupling, broad-ly designated 40, incorporating the spider bearing and yoke assembly of the present invention is illustra-ted.
As with the prior art construction shown in Fig. 1, two rotatable shafts 42 and 43 have opposed ends 45 and 46 carrying Y-shaped yoke members 48 and 49, respectively.
The yoke members 48 and 49 are interconnected through a multi-legged spider element 51 in a manner described hereafter.
Since each of the yoke mem~ers 48 and 49 is similarl~ constructed, for purposes of brevity and clarity, only one yoke member will be described in de-tail. The yoke member 48, see Figs. 2 and 3, has a bod~
portion 53 secured by suitable means (not shown) co-linearly with the shaft 42 and has laterally extending leg portions, each designated 54 and including a moun-t-ing flange 56. Each of the mounting flanges 56 has an axially outward flat mounting surface 57 which is per-pendicular to the rotational axis of the shaft 42 and terminates in an outer abutment 59 Four spider bearing caps, all of which are designated 60 and are of similar construction, i~clude bearings or bushings (not shown) which journal the re-specti~e end of one of the four legs of the cross-shaped spider element 51, all of the spider legs being desig-nated 52. oppositely disposed legs 52 of the spider element 51 extend across each yoke member 48 or 49 and are journaled by the spider caps 60 for rotation along an axis extending therebetween. Each of the spider caps 30 60 has a body portion 61 with a flat bottom face 62 æ~;
which will be located in fronting relation with themounting surface 57 of the yoke mounting flange 56.
As seen with reference to the yoke member and spider cap associated with the rotatable shaft 43, bol-t receiving bores 64 are defined in the spider cap 60 and extend axially inward from the bottom face 62. One bore 64 is located on each lateral side of the journaling portion of the spider cap 60. Bolt-mounting bores 65 are defined through each of the mounting flanges 56 of the yoke member 49 and are spaced from the rotational axis of the sha~t 43 along a lateral line across the flange. The bolt-mounting bores 65 permit the threaded shanks of bolts 67 to be inserted through the mounting flange 56 and threaded into the spider cap 60.
A pair of tapered driving keys 70 are carried integrally by each of the spider caps 60 and extend axially outward from the bottom face 62. Each key 70 tapers axially outward and thus is wider at the base adjacent the bottom face 62 than at the outward end.
The tapered keys 70 are respectively aligned along the centerline of the bolt-receiving bores 64 spaced from the spider journal.
A pair of tapered slots or keyways 71 are de-fined in the axial outward mounting surfaces 57 of the mounting flange 56 and are aligned along the centerline of the bolt-mounting bores 65. The keyways 71 taper axially inward and thus are wider across their opening at the axial face than at their bottom. Although the keys 70 and keyways 71 are generally of similar cross~
sectional configuration and are adapted for cooperative Q`.`
engagement with one another, tha ke~ways 71 have a cross-sectional siæe which is slightly smaller than the cross-sectional size of the keys 70.
During assembly of the universal coupling 40, a spider cap 60 will be positioned on the end of each of the spider legs 52. The spider caps 60 can then be located adjacent the yoke-mounting flanges 56 with the bottom face 62 of the spider cap 60 in face-to-face relationship with the mounting surface 57 of the mount-ing flange 56 and the spider cap 60 and mounting flange56 being aligned. In this position, the keys 70 and keyways 71 will also be placed in axial alignment with the keys 70 extending axially toward the keyways 71.
Thereafter, the bolts 67 are inserted through the bolt-mounting bores 65 of the yoke member 48 or 49 and screwed into the bolt-receiving bores 64 in the spider cap 60. As the bolts 67 are tightened, the spider cap 60 will be moved toward the yoke member 48 or 49 to draw the key and keyway combination to~ether in fixed relation.
When the bolts 67 are tightened to attain a predetermined pre]oad, the keys 70 will frictionally seat within the keyways 71~ Since the keys 70 and key-ways 71 do not interfit completely, there will be a gap 73 defined between the axial mounting surface 57 of the mounting flange 56 and the bottom face 62 of the spider cap 60. The gap 73 does not adversely affect the struc-tural integrity of the connection between the yoke mem-ber and the spider cap.
~13~
The tensile force o~ the bolts 67 is trans-mitted to the parts so that a ~orce is exerted between the respective mating tapered surfaces of the key 70 and the keyway 71, thereby resulting ln a substantial frictional force. Since the spider cap 60 is fixed to the yoke member 48 or 49 against relative movement, torque is transmitted from one shaft through the key 70 and keyway 71 to the other shaft to effect rotation thereof.
Industrial Applicability It can be appreciated that the above-clescribed couplin~ having a spider-type connection may be employed in line with drive shafts, steering columns and the like, with advantageous results. The tapered design allows a full seat and thus eliminates relative motion between parts and the resultant loosening of the connection b~tween parts. The placement of the key and keyway along the bolt centerlines allows the bolts to be tightened to any desired preload without distortion of the bolts of the joined parts.
Thus, the problem o~ maintaining clearance or low tolerances is avoided. In addition, high torque and shear stresses are distributed over a-t least two key and keyway combinations rather than one.
other aspects, objects and advantages of this invention can be obtained ~rom a study o~ the drawings, the disclosure and the appended claims.
Claims (7)
1. A spider bearing and yoke assembly for use as a universal coupling for interconnecting two opposed rotatable shafts, said assembly comprising:
a spider element with plural legs;
a pair of yokes for mounting on opposed ends of the respective shafts, such yokes having spaced parts;
a spider cap located on each of said yoke parts providing a journal for each leg of the spider element;
one of said spider caps and yoke parts having a tapered key extending axially outward toward the mating one of the spider cap and yoke part; and said mating one of the spider cap and yoke part defining a tapered keyway for cooperation with said key, said tapered keyway being smaller than said tapered key to prevent said key from moving completely into said keyway;
said tapered key and keyway lying parallel to an axis of the related leg of the spider element and being displaced radially outward from said axis; and securing means for moving each of said spider caps toward its respective yoke part to draw the spider cap and yoke part together into fixed axial relation, the tapers of said key and keyway being frictionally engaged to pre-vent relative radial and axial movement between the spider cap and yoke part.
a spider element with plural legs;
a pair of yokes for mounting on opposed ends of the respective shafts, such yokes having spaced parts;
a spider cap located on each of said yoke parts providing a journal for each leg of the spider element;
one of said spider caps and yoke parts having a tapered key extending axially outward toward the mating one of the spider cap and yoke part; and said mating one of the spider cap and yoke part defining a tapered keyway for cooperation with said key, said tapered keyway being smaller than said tapered key to prevent said key from moving completely into said keyway;
said tapered key and keyway lying parallel to an axis of the related leg of the spider element and being displaced radially outward from said axis; and securing means for moving each of said spider caps toward its respective yoke part to draw the spider cap and yoke part together into fixed axial relation, the tapers of said key and keyway being frictionally engaged to pre-vent relative radial and axial movement between the spider cap and yoke part.
2. The assembly of claim 1 wherein a pair of keys are carried by said one of said spider caps and yoke parts and a pair of keyways are defined by said mating one of spider cap and yoke part.
3. The assembly of claim 2 wherein said keys are carried by the one of the spider caps and said keyways are defined by the mating one of the yoke parts.
4. The assembly of claim 3 wherein said securing means are bolts extending through bores defined through said mating one of the yoke part and into bores defined in said one of spider cap, and said keys and keyways are aligned along the centerlines of said bores.
5. The assembly of claim 3 wherein said keys are formed integral with said one of the spider caps.
6. A spider bearing and yoke assembly for use as a universal coupling for interconnecting two rotatable shafts having opposed ends, said assembly comprising:
a multi-legged spider element;
a pair of yokes for mounting on the opposed ends of the respective shafts, each such yoke having spaced parts with mounting flanges extending laterally from the rotational axis of its respective shaft, said mounting flanges each having a pair of bolt-mounting bores, each bore disposed generally along a centerline spaced from the rotational axis of the respective shaft;
a spider cap located on each mounting flange and each providing a journal for one leg of the spider element and having two bolt-receiving bores, said bolt receiving holes being on either side of the spider journal, and disposed generally along a centerline spaced from the spider journal and aligned with said bolt-mounting bores;
a plurality of bolts extending respectively through the bolt-mounting bores and into the bolt-receiving bores;
a pair of tapered keys extending axially outward from and aligned one along the centerline of each respective bolt-receiving bore;
said pair of tapered keys aligning with each other along an axis radially spaced outward from rotational axes of said shafts; and a pair of tapered keyways defined in each mounting flange aligned one along the centerline of each respective bolt-mounting bore and having a cross-sectional size smaller than that of said tapered keys, said pair of tapered keyways aligning with each other along an axis radially spaced outward from the rota-tional axes of said shafts, whereby tightening of the bolts aligns and secures the spider caps to the respec-tive yoke-mounting flanges with the keys frictionally seating partially within their respective keyways for transmission of rotational torque between the shafts.
a multi-legged spider element;
a pair of yokes for mounting on the opposed ends of the respective shafts, each such yoke having spaced parts with mounting flanges extending laterally from the rotational axis of its respective shaft, said mounting flanges each having a pair of bolt-mounting bores, each bore disposed generally along a centerline spaced from the rotational axis of the respective shaft;
a spider cap located on each mounting flange and each providing a journal for one leg of the spider element and having two bolt-receiving bores, said bolt receiving holes being on either side of the spider journal, and disposed generally along a centerline spaced from the spider journal and aligned with said bolt-mounting bores;
a plurality of bolts extending respectively through the bolt-mounting bores and into the bolt-receiving bores;
a pair of tapered keys extending axially outward from and aligned one along the centerline of each respective bolt-receiving bore;
said pair of tapered keys aligning with each other along an axis radially spaced outward from rotational axes of said shafts; and a pair of tapered keyways defined in each mounting flange aligned one along the centerline of each respective bolt-mounting bore and having a cross-sectional size smaller than that of said tapered keys, said pair of tapered keyways aligning with each other along an axis radially spaced outward from the rota-tional axes of said shafts, whereby tightening of the bolts aligns and secures the spider caps to the respec-tive yoke-mounting flanges with the keys frictionally seating partially within their respective keyways for transmission of rotational torque between the shafts.
7. The assembly of claim 6 wherein said keys are formed integral with said spider cap.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| USPCT80/00083 | 1980-01-28 | ||
| PCT/US1980/000083 WO1981002187A1 (en) | 1980-01-28 | 1980-01-28 | Universal coupling spider bearing and yoke |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1139120A true CA1139120A (en) | 1983-01-11 |
Family
ID=22154180
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000360868A Expired CA1139120A (en) | 1980-01-28 | 1980-09-23 | Universal coupling spider bearing and yoke |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JPS57500033A (en) |
| BE (1) | BE886926A (en) |
| CA (1) | CA1139120A (en) |
| GB (1) | GB2068506B (en) |
| WO (1) | WO1981002187A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3314322C2 (en) * | 1983-04-20 | 1986-05-28 | J.M. Voith Gmbh, 7920 Heidenheim | Universal joint for a cardan shaft |
| FR2597940B1 (en) * | 1986-04-28 | 1990-05-25 | Glaenzer Spicer Sa | CARDAN JOINT WITH FRONT GROOVED BEARINGS |
| DE59102257D1 (en) * | 1990-12-15 | 1994-08-25 | Volkswagen Ag | Torque-transmitting articulated connection, preferably for drive half-shafts or multi-part cardan shafts of motor vehicles. |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2228715A (en) * | 1939-01-16 | 1941-01-14 | Universal Products Co Inc | Universal joint |
| US2270397A (en) * | 1940-09-12 | 1942-01-20 | Borg Warner | Universal joint |
| US2328139A (en) * | 1941-02-03 | 1943-08-31 | Anton F Greiner | Universal joint |
| FR1050969A (en) * | 1951-02-21 | 1954-01-12 | Borg Warner | Improvements relating to a universal joint |
| US3145547A (en) * | 1961-12-28 | 1964-08-25 | Dana Corp | Alignment device |
| US3216087A (en) * | 1962-10-18 | 1965-11-09 | Rockwell Standard Co | Method of manufacturing a tapered needle bearing universal joint |
| US3324681A (en) * | 1965-08-16 | 1967-06-13 | Dana Corp | Mounting of bearing races in a universal joint member |
| DE2554574A1 (en) * | 1975-12-04 | 1977-06-08 | Gelenkwellenbau Gmbh | DISC COUPLING FOR CONNECTING SHAFTS |
| US4090796A (en) * | 1977-07-23 | 1978-05-23 | Koyo Seiko Company, Limited | Device for fastening needle case to yoke in universal joint of trunnion type |
-
1980
- 1980-01-28 WO PCT/US1980/000083 patent/WO1981002187A1/en unknown
- 1980-01-28 JP JP50146480A patent/JPS57500033A/ja active Pending
- 1980-09-23 CA CA000360868A patent/CA1139120A/en not_active Expired
- 1980-12-08 GB GB8039328A patent/GB2068506B/en not_active Expired
- 1980-12-31 BE BE1/10088A patent/BE886926A/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| GB2068506B (en) | 1983-07-06 |
| WO1981002187A1 (en) | 1981-08-06 |
| GB2068506A (en) | 1981-08-12 |
| BE886926A (en) | 1981-06-30 |
| JPS57500033A (en) | 1982-01-07 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |