WO1989005920A1 - Locking arrangement for locking a nut - Google Patents
Locking arrangement for locking a nut Download PDFInfo
- Publication number
- WO1989005920A1 WO1989005920A1 PCT/US1988/000653 US8800653W WO8905920A1 WO 1989005920 A1 WO1989005920 A1 WO 1989005920A1 US 8800653 W US8800653 W US 8800653W WO 8905920 A1 WO8905920 A1 WO 8905920A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- nut
- lock plate
- tang
- rotatable member
- spaced
- Prior art date
Links
- 230000002093 peripheral effect Effects 0.000 claims description 9
- 230000003993 interaction Effects 0.000 description 1
- 230000036316 preload Effects 0.000 description 1
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
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B39/00—Locking of screws, bolts or nuts
- F16B39/02—Locking of screws, bolts or nuts in which the locking takes place after screwing down
- F16B39/10—Locking of screws, bolts or nuts in which the locking takes place after screwing down by a plate, spring, wire or ring immovable with regard to the bolt or object and mainly perpendicular to the axis of the bolt
-
- 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
- F16D1/00—Couplings for rigidly connecting two coaxial shafts or other movable machine elements
- F16D1/06—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end
Definitions
- This invention relates to a locking arrangement for locking a nut in a fixed position and more particularly to a lock plate for interacting with the nut.
- Locking arrangements are commonly employed to lock a nut at a fixed angular position relative to a rotatable member and a shaft to maintain a predetermined force and preload on a bearing.
- a cap is provided for covering the shaft end and the nut, with the cap having an inwardly directed tang to engage a slot on the outer periphery of the nut to prevent relative rotation between the nut and the shaft. With the cap covering the end of the shaft and the nut it is difficult to engage the tang with the slot.
- One of the problems associated with the currently available locking arrangements is that a plurality of bolts are required to hold the cap in position.
- a cotter pin or a lock wire is inserted in a hole in a shaft and slots in a nut to prevent rotation of the nut.
- the hole in the shaft structurally weakens the shaft wherein the shaft could easily be fractured.
- the present invention is directed to overcome one or more of the problems as set forth above. Disclosure of the Invention
- a locking arrangement for locking a nut at a . fixed angular position relative to a rotatable member.
- the nut has an outer peripheral surface.
- a means defines a threaded hole in the rotatable member.
- a means defines a plurality of circumferentially equally; spaced slots in the outer peripheral surface of the nut. At least one slot is positionable at a predetermined relationship with the threaded hole.
- a lock plate has a single mounting aperture therethrough in axial alignment with the threaded hole.
- a tang interacts with the one slot.
- a contact surface spaced from the tang interacts with the outer peripheral surface of the nut.
- a threaded fastening means extends through the aperture in the lock plate and is threaded into the threaded hole for releasably fastening the lock plate to the rotatable member.
- the locking arrangements commonly used :today require a plurality of bolts to hold a ilock cap in -.- position or a hole is required in the: shaft to prevent ⁇ rotation of the nut.
- a locking plate with a tang is positioned in a slot of the nut to prevent rotation of the nut.
- the present locking arrangement requires only a single bolt and a contact surface to prevent rotation of the nut.
- Fig. 1 is a diagrammatic cross-sectional view through a drive structure showing an embodiment . of the present invention
- Fig. 2 is an end view of the present invention as taken along lines II-II of Fig. 1;
- Fig. 3 is a plan view of a component of the present invention.
- a locking arrangement 10 is operatively associated with a drive arrangement 11 including a rotatable member 12, a nut 14, and a shaft 16 rotatably journaled in a support structure 18.
- the shaft has a threaded end portion 19.
- the support structure 18 has a bore 20 which terminates at an annular shoulder 22.
- a bearing 24 includes an outer race 26 non-rotatably positioned in the bore 20 and in contact with the annular shoulder 22, and an inner race 28 in contact with the rotatable member 12.
- the rotatable member 12 is drivingly connected to the shaft 16 by drive means 30.
- the drive means 30 is a spline connection.
- the rotatable member 12 has an abutment surface 31 in contact with the inner race 28 of the bearing and a mounting surface 32 opposite the abutment surface 31.
- a means 33 defines a plurality of threaded holes 34, having openings in the mounting surface 32, equally angularly spaced within the rotatable member 12.
- the nut 14 has an internal thread 36 which interacts with the threaded end portion 19 of the shaft and an outer peripheral surface 38.
- a means 39 defines a plurality of slots 40 equally angularly spaced within the outer peripheral surface, 38 of. the' nut 14.
- the locking arrangement 10 includes a lock plate 44 and a fastening means 46 for releasably fastening the lock plate 44 to the rotatable member 12.
- the lock plate 44 has a semicircular shape having first surface 47 and a second surface 48 and an edge portion 50.
- a pair of spaced apart slots 54 extend between the first and second surfaces 47,48 and opening at the edge portion 50.
- a tang 56 is defined by the spaced apart slots 54.
- a pair of contact surfaces 58, spaced from the tang 56, are formed at the intersection of the slots 54 opposite the tang with the edge portion 50.
- a single mounting aperture: 60 centered in respect to the tang 56 extends between the opposite surfaces 47,48 and positioned when in use. to align with one of the plurality of threaded holes . 34.
- the fastening means 46 is a- bolt 62 positioned in the single mounting aperture 60 of the lock plate 44 and threaded into one of the.: threaded holes 34 of the rotatable member 12.
- the bearing 24 and the shaft 16 are assembled in the usual manner within the annular bore 30 of the support structure 28.
- the rotatable member 12 is drivingly connected to shaft 15. Rotation of the rotatable member 12 relative to the shaft 15 is . . prevented by the spline connection between the shaft 16 and the rotatable member 12.
- the nut 14 is threaded onto the threaded end portion 19 of the shaft 16 to the desired degree of tightness wherein one of the slots 40 is in alignment with one of the holes 34. With the nut 14 in the desired position, the tang 56 of the lock plate 44 is inserted into the one slot of the plurality of slots 40 which is aligned with the one hole of the plurality of threaded holes 34.
- the fastening means 46 is inserted in the mounting aperture 60 of the lock plate 44 and is threaded into the one threaded hole 34 in the rotatable member 12 which is in line with the slot 40 of the nut 14. Rotation of the nut 14 relative to the rotatable member 12 is limited by the interaction of the tang 56 and contact surfaces 58 of the lock plate 44 with one of the slots 40 and outer peripheral surface 38 respectively of the nut 14. Rotation of the nut 14 in either direction exerts a force on the tang 56 to pivot the lock plate 44 around the fastening means 46, but the appropriate one of the contact surfaces 58 will contact the outer peripheral surface 38 of the nut 14 and prevent the rotation thereof.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bolts, Nuts, And Washers (AREA)
Abstract
A locking arrangement is provided for preventing relative rotation between a nut (14) and a rotatable member (12). The locking arrangement includes a lock plate (44) having a tang (56) which engages one of a plurality of slots (40) on the outer periphery (38) of the nut (14). The lock plate (44) includes at least one contact surface (58) for contacting the nut (14) to prevent rotation. A bolt (62) positioned in an aperture (60) of the lock plate (44) is threaded into a threaded hole (34) of the rotatable member (12) for releasably fastening the lock plate (44) to the rotatable member (12).
Description
Description
Locking Arrangement for Locking a Nut
Technical Field
This invention relates to a locking arrangement for locking a nut in a fixed position and more particularly to a lock plate for interacting with the nut.
Background Art
Locking arrangements are commonly employed to lock a nut at a fixed angular position relative to a rotatable member and a shaft to maintain a predetermined force and preload on a bearing. In one instance a cap is provided for covering the shaft end and the nut, with the cap having an inwardly directed tang to engage a slot on the outer periphery of the nut to prevent relative rotation between the nut and the shaft. With the cap covering the end of the shaft and the nut it is difficult to engage the tang with the slot. One of the problems associated with the currently available locking arrangements is that a plurality of bolts are required to hold the cap in position.
In another instance a cotter pin or a lock wire is inserted in a hole in a shaft and slots in a nut to prevent rotation of the nut. However, the hole in the shaft structurally weakens the shaft wherein the shaft could easily be fractured.
The present invention is directed to overcome one or more of the problems as set forth above.
Disclosure of the Invention
In one aspect of the present invention a locking arrangement is provided for locking a nut at a . fixed angular position relative to a rotatable member. The nut has an outer peripheral surface. A means defines a threaded hole in the rotatable member. A means defines a plurality of circumferentially equally; spaced slots in the outer peripheral surface of the nut. At least one slot is positionable at a predetermined relationship with the threaded hole. A lock plate has a single mounting aperture therethrough in axial alignment with the threaded hole. A tang interacts with the one slot. A contact surface spaced from the tang interacts with the outer peripheral surface of the nut. A threaded fastening means extends through the aperture in the lock plate and is threaded into the threaded hole for releasably fastening the lock plate to the rotatable member.
The locking arrangements commonly used :today require a plurality of bolts to hold a ilock cap in -.- position or a hole is required in the: shaft to prevent■ rotation of the nut. With the present locking arrangement r a locking plate with a tang is positioned in a slot of the nut to prevent rotation of the nut.
The present locking arrangement requires only a single bolt and a contact surface to prevent rotation of the nut.
Brief Description of the Drawing
Fig. 1 is a diagrammatic cross-sectional view through a drive structure showing an embodiment . of the present invention;
Fig. 2 is an end view of the present invention as taken along lines II-II of Fig. 1; and
Fig. 3 is a plan view of a component of the present invention.
Best Mode for Carrying Out the Invention
Referring to the drawings, a locking arrangement 10 is operatively associated with a drive arrangement 11 including a rotatable member 12, a nut 14, and a shaft 16 rotatably journaled in a support structure 18. The shaft has a threaded end portion 19. The support structure 18 has a bore 20 which terminates at an annular shoulder 22.
A bearing 24 includes an outer race 26 non-rotatably positioned in the bore 20 and in contact with the annular shoulder 22, and an inner race 28 in contact with the rotatable member 12.
The rotatable member 12 is drivingly connected to the shaft 16 by drive means 30. In this embodiment the drive means 30 is a spline connection. The rotatable member 12 has an abutment surface 31 in contact with the inner race 28 of the bearing and a mounting surface 32 opposite the abutment surface 31. A means 33 defines a plurality of threaded holes 34, having openings in the mounting surface 32, equally angularly spaced within the rotatable member 12.
The nut 14 has an internal thread 36 which interacts with the threaded end portion 19 of the shaft and an outer peripheral surface 38. A means 39 defines a plurality of slots 40 equally angularly
spaced within the outer peripheral surface, 38 of. the' nut 14.
The locking arrangement 10 includes a lock plate 44 and a fastening means 46 for releasably fastening the lock plate 44 to the rotatable member 12. The lock plate 44 has a semicircular shape having first surface 47 and a second surface 48 and an edge portion 50. A pair of spaced apart slots 54 extend between the first and second surfaces 47,48 and opening at the edge portion 50. A tang 56 is defined by the spaced apart slots 54. A pair of contact surfaces 58, spaced from the tang 56, are formed at the intersection of the slots 54 opposite the tang with the edge portion 50. A single mounting aperture: 60 centered in respect to the tang 56 extends between the opposite surfaces 47,48 and positioned when in use. to align with one of the plurality of threaded holes . 34. In this embodiment the fastening means 46 is a- bolt 62 positioned in the single mounting aperture 60 of the lock plate 44 and threaded into one of the.: threaded holes 34 of the rotatable member 12.
Industrial Applicability The bearing 24 and the shaft 16 are assembled in the usual manner within the annular bore 30 of the support structure 28. The rotatable member 12 is drivingly connected to shaft 15. Rotation of the rotatable member 12 relative to the shaft 15 is . . prevented by the spline connection between the shaft 16 and the rotatable member 12. The nut 14 is threaded onto the threaded end portion 19 of the shaft 16 to the desired degree of tightness wherein one of the slots 40 is in alignment with one of the holes 34. With the nut 14 in the desired position, the tang 56
of the lock plate 44 is inserted into the one slot of the plurality of slots 40 which is aligned with the one hole of the plurality of threaded holes 34. The fastening means 46 is inserted in the mounting aperture 60 of the lock plate 44 and is threaded into the one threaded hole 34 in the rotatable member 12 which is in line with the slot 40 of the nut 14. Rotation of the nut 14 relative to the rotatable member 12 is limited by the interaction of the tang 56 and contact surfaces 58 of the lock plate 44 with one of the slots 40 and outer peripheral surface 38 respectively of the nut 14. Rotation of the nut 14 in either direction exerts a force on the tang 56 to pivot the lock plate 44 around the fastening means 46, but the appropriate one of the contact surfaces 58 will contact the outer peripheral surface 38 of the nut 14 and prevent the rotation thereof.
With the present invention it is possible to prevent relative rotation between the nut 14 and the rotatable member 12 using a lock plate 44 which requires only a single bolt 62 in a single aperture 60 to lock the nut 14 in position. The tang 56 of the lock plate 44 can easily be positioned in one of the slots 40 of the nut 14. The tang 56 being positioned in one of the slots 40 will position the contact areas 58 in close proximity to the outer surface 38 of the nut 14 to contact the nut 14 and stop rotation of the lock plate 44.
Other aspects, objects and advantages of this invention can be obtained from a study of the drawings, the disclosure and the appended claims.
Claims
1. A locking arrangement (10) for locking a nut (14) at a fixed angular position- relative to a rotatable member (12) , said nut (14) having an outer peripheral surface (38) , comprising: means (33) defining a threaded hole (34) in the rotatable member (12) ; means (39) defining a plurality of circumferentially equally spaced slots (40) in the outer peripheral surface (38) of the nut (14) with at least one slot (40) being positionable at a predetermined relationship with the threaded hole (34) ; a lock plate (44) having a single mounting aperture (60) extending therethrough and being in- axial alignment with the threaded hole (34) , a tang (56) interacting with the one slot (40) , and a contact : surface (58) spaced from the tang (56) and interacting - with the outer surface (38) of the nut (14) ; and threaded fastening means (46) extending through the aperture (60) in the lock plate (44) and threaded into the threaded hole (34) for releasably fastening the lock plate (44) to the rotatable member (12) .
2. The locking arrangement (10) of claim 2 wherein the lock plate has an edge portion (50) containing a pair of spaced slots (54) which define the tang (56) therebetween.
3. The locking arrangement (10) of claim 2 wherein the intersection of the slots (54) and the edge portion (50) of the lock plate (44) form contact surfaces (58) spaced from the tang (56) and positioned for contacting the outer surface (38) of the nut (14) to prevent rotation of the nut (14) in respect to the rotatable member (12) .
4. A locking arrangement (10) of claim 1 wherein the rotatable member (12) has a plurality of circumferentially equally spaced threaded holes (34) therein.
5. The locking arrangement (10) of claim 1 wherein the fastening means (46) is a bolt (62) .
6. A lock plate (44) having an edge portion (50) , a pair of spaced slots (54) in the edge portion (50) , a tang (56) between the spaced slots (54) , a contact surface (58) spaced from the tang (56) formed by the intersection of the edge of the slots (54) opposite the tang (56) with the edge portion (50) , a single mounting aperture (60) therethrough spaced from the edge portion (50) centered in respect to the tang (56) .
7. The lock plate (44) of claim 6 wherein the lock plate (44) is semicircular.
8. The lock plate (44) of claim 7 wherein the spaced slots (54) are semicircular.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US13779487A | 1987-12-24 | 1987-12-24 | |
| US137,794 | 1987-12-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO1989005920A1 true WO1989005920A1 (en) | 1989-06-29 |
Family
ID=22479070
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/US1988/000653 WO1989005920A1 (en) | 1987-12-24 | 1988-03-04 | Locking arrangement for locking a nut |
Country Status (2)
| Country | Link |
|---|---|
| AU (1) | AU1495988A (en) |
| WO (1) | WO1989005920A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8052225B2 (en) * | 2008-11-11 | 2011-11-08 | Shimano Inc. | Bicycle wheel securing structure |
| US20140374978A1 (en) * | 2014-09-08 | 2014-12-25 | Caterpillar Inc. | Fixture for a coupling assembly |
| CN111720407A (en) * | 2020-06-29 | 2020-09-29 | 海盐特邦科技股份有限公司 | Fastener of convenient installation |
| CN112664540A (en) * | 2020-12-24 | 2021-04-16 | 浙江天元金属制品股份有限公司 | Multifunctional screw |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB190023496A (en) * | 1900-12-22 | 1901-11-02 | William Phillips Thompson | Improvements in Locking Arrangements for Nuts and the like |
| US1436743A (en) * | 1919-12-13 | 1922-11-28 | Henry E Wild | Watchcase screw |
| FR658533A (en) * | 1928-08-03 | 1929-06-05 | Device preventing the nuts from loosening | |
| US2561224A (en) * | 1946-11-15 | 1951-07-17 | Pischek | Locking arrangement for screws |
| CA979249A (en) * | 1972-12-04 | 1975-12-09 | Textron Inc. | Threaded fastener device with torque control and driver therefor |
-
1988
- 1988-03-04 AU AU14959/88A patent/AU1495988A/en not_active Abandoned
- 1988-03-04 WO PCT/US1988/000653 patent/WO1989005920A1/en unknown
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB190023496A (en) * | 1900-12-22 | 1901-11-02 | William Phillips Thompson | Improvements in Locking Arrangements for Nuts and the like |
| US1436743A (en) * | 1919-12-13 | 1922-11-28 | Henry E Wild | Watchcase screw |
| FR658533A (en) * | 1928-08-03 | 1929-06-05 | Device preventing the nuts from loosening | |
| US2561224A (en) * | 1946-11-15 | 1951-07-17 | Pischek | Locking arrangement for screws |
| CA979249A (en) * | 1972-12-04 | 1975-12-09 | Textron Inc. | Threaded fastener device with torque control and driver therefor |
Non-Patent Citations (1)
| Title |
|---|
| American Machinist, issued 27 July 1916. * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8052225B2 (en) * | 2008-11-11 | 2011-11-08 | Shimano Inc. | Bicycle wheel securing structure |
| US8419137B2 (en) | 2008-11-11 | 2013-04-16 | Shimano Inc. | Bicycle wheel securing structure |
| US8424975B2 (en) | 2008-11-11 | 2013-04-23 | Shimano Inc. | Bicycle wheel securing structure |
| US20140374978A1 (en) * | 2014-09-08 | 2014-12-25 | Caterpillar Inc. | Fixture for a coupling assembly |
| CN111720407A (en) * | 2020-06-29 | 2020-09-29 | 海盐特邦科技股份有限公司 | Fastener of convenient installation |
| CN111720407B (en) * | 2020-06-29 | 2021-12-03 | 海盐特邦科技股份有限公司 | Fastener of convenient installation |
| CN112664540A (en) * | 2020-12-24 | 2021-04-16 | 浙江天元金属制品股份有限公司 | Multifunctional screw |
Also Published As
| Publication number | Publication date |
|---|---|
| AU1495988A (en) | 1989-07-19 |
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