CA2274237C - Retainer for non-rotating connecting pin - Google Patents
Retainer for non-rotating connecting pin Download PDFInfo
- Publication number
- CA2274237C CA2274237C CA 2274237 CA2274237A CA2274237C CA 2274237 C CA2274237 C CA 2274237C CA 2274237 CA2274237 CA 2274237 CA 2274237 A CA2274237 A CA 2274237A CA 2274237 C CA2274237 C CA 2274237C
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- CA
- Canada
- Prior art keywords
- pin
- cross
- set forth
- bore
- cross pin
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- Expired - Fee Related
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- Component Parts Of Construction Machinery (AREA)
- Snaps, Bayonet Connections, Set Pins, And Snap Rings (AREA)
Abstract
An anti-rotation pin structure for an agricultural implement includes a retainer laser cut from flat stock to include a pin-receiving opening with opposing grooves which are adapted to receive the ends of a cross pin. The retainer is secured to one side of support structure and receives a simple support pin having small bores extending diametrically through its ends. The cross pin is inserted through one of the bores with the ends of the cross pin projecting radially outwardly a short distance from opposite sides of the support pin. The end of the support pin opposite the cross pin end is inserted through the openings until the projecting cross pin ends seat in the opposing grooves. Thereafter, a quick lock pin is inserted through the bore in the end opposite the cross pin end to fix the cross pin inside the pin retainer and lock the support pin against rotation.
Description
RETAINER FOR NON-ROTATING CONNECTING PIN
BACKGROUND OF THE INVENTION
1) Field of the Invention:
The present invention relates generally to agricultural implements and, more specifically, to pin construction for such implements.
BACKGROUND OF THE INVENTION
1) Field of the Invention:
The present invention relates generally to agricultural implements and, more specifically, to pin construction for such implements.
2) Related Art:
Pins are used at numerous locations on implements to connect two or more structures which rotate or otherwise move relative to each other. With the relative movement of the structures, there is a tendency for the connecting pin to rotate also. Often to reduce pin and pin support wear and to maintain a desired pin orientation, an anti-rotation device is employed to fix the pin against rotation. Some current weldments with anti-rotation devices fix the connecting pin with a tube and a through hole arrangement.
Such devices can significantly increase clearance requirements and often include costly tubing wherein the inner diameter has to be held to close tolerances. Further, removing the pin can be difficult or require specified torque values be applied when reinstalling the pin or other hardware.
BRIEF SUMMARY OF THE INVENTION
It is therefore an object of the present invention to provide an improved anti-rotation pin structure. It is a further object to provide such a structure which overcomes most or all of the aforementioned problems.
It is a further object of the present invention to provide an improved anti-rotation pin structure which is simple and relatively inexpensive in construction and easy to attach and remove. It is a further object to provide such a structure which obviates tube and through hole arrangements.
It is another object to provide an improved anti-rotation pin structure which facilitates removal and reinstallation of the pin without requiring tools or torque specifications. It is yet another object to provide such a pin structure which is easy to manufacture and is particularly adaptable to laser cutting techniques.
A pin retainer constructed in accordance with the teachings of the present invention includes a retainer laser cut from flat stock to include a pin-receiving opening with opposing grooves which are adapted to receive the ends of a cross pin or spring pin. In an alternate embodiment, the retainer shape can be designed directly into a pin support casting. The retainer is secured to one side of the pin support structure with the pin-receiving opening aligned with a corresponding pin opening in the pin support structure to receive a simple support pin having small bores extending diametrically through its ends. The spring pin is inserted through one of the bores with the ends of the spring pin projecting radially outwardly a short distance from opposite sides of the support pin. The end of the support pin opposite the spring pin end is inserted through the openings until the projecting spring pin ends seat in the opposing grooves. Thereafter, a quick lock pin is inserted through the bore in the end opposite the spring pin end to fix the spring pin inside the pin retainer and lock the support pin against rotation.
The pin construction is simple and inexpensive, and easy to attach and remove.
Tubes having inner diameters with close tolerances are eliminated, and clearance requirements are kept to a minimum. The spring pin and quick lock pin arrangement is easy and inexpensive to manufacture, and the support pin can be easily removed and reinstalled without tools or special torque requirements. Once installed, the support pin is held against rotation by the retainer.
These and other objects, features and advantages of the present invention will become apparent to one skilled in the art upon reading the following detailed description in view of the drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a side view of a portion of a connecting structure showing the retainer and the spring pin end of the connecting pin.
FIG. 2 is a front view of the connecting structure of FIG. 1.
FIG. 3 is a plan view of the connecting pin of FIGS. 1 and 2.
FIG. 4 is a perspective view of a portion of one side of the connecting structure of FIG. 1 with the connecting pin removed to more clearly show the details of the retainer.
DETAILED DESCRIPTION OF THE DRAWINGS
Referring now to FIGS. 1 and 2, therein is shown connecting structure 10 for an implement or the like (not shown). The connecting structure 10 includes first and second parallel spaced plates or elements 12 and 14 with outer sidewalls 12a and 14a.
The structure 10 is attached to a first portion of the implement and a supported element 18, such as a cylinder end or a beam connected to a second portion of the implement, is pivotally connected between the plates at aperture locations 22 and 24 by connecting pin structure indicated generally at 28. A pin anti-rotation retainer 30 is secured to the outer sidewall 12a and receives one end of the pin structure 28.
The pin structure 28 includes a cylindrical pin member 38 having a shaft axis 38a and opposed beveled ends 42 and 44. The ends 42 and 44 include small bores 62 and 64 which are parallel to each other and extend through the diameter of the member (perpendicular to the shaft axis 38a). A small cross pin such as a spring pin or roll pin 72 is inserted into the bore 62 and extends radially outwardly a short distance from the outer surface of the pin member 38 (FIGS. 1 and 2). The cross pin 72 can also be solid if the specific joint requires a stronger pin. The spacing between the bores 62 and 64 is greater than the spacing between the outer sidewalls 12a and 14a so that insertionlremoval of pin 74 by hand is unhindered. The spacing, however, is small enough so there is insufficient axial movement of the pin 38 to disengage pin 72 from the retainer 30.
A conventional quick attach pin 74 (FIG. 2) is selectively insertable into and removable from the bore 64. The quick attach pin 74 includes a stepped end 76 pivotally supporting a locking bail 78 that is rotatable upwardly from a locking position (shown) encircling the end 44 when the pin shank is supported in the bore 64 to an unlocking position (not shown) offset outwardly from the end. When the bail 78 is in the unlocking position, the shank of the pin 74 can be slid into and out of the bore 64 by hand independently of tools.
The anti-rotation retainer 30 is preferably laser cut and fabricated from flat stock to include a central aperture 82 which, when the retainer is secured to the side 12a, aligns with the apertures 22 and 24 (FIG. 4). The retainer 30 may be cast integrally with the element 12 rather than laser cut. The aperture 82 has a diameter approximately equal to but slightly greater than the diameter of the pin member 38. Diametrically opposed grooves or spring pin-receiving recesses 86 and 88 project outwardly from the aperture 82 and have a depth slightly greater than the diameter of the spring pin 72.
Initially, the spring pin 72 is inserted in the bore 62 of the pin member 38.
The opposite end 44 of the pin member 38 is then inserted through the aperture locations 22 and 24 and through a bore in the supported element 18. The end 44 of the pin member 38 extends through a washer 90 which abuts the sidewall 14a (FIG. 2). The radially projecting ends of the spring pin 72 seat in the grooves 86 and 88 with the beveled end 42 projecting only a small amount axially from the outer wall of the retainer 30. The shank of the pin 74 is inserted through the bore 64, and the bail 78 is rotated downwardly (as seen in FIG. 2) over the end 44 to retain the pin 74 in position. The grooves 86 and 88 secure the pin member 38 against rotation relative to the plates 12 and 14 so that the supported element 18 rotates on the wide surface of the pin member between the sidewalls 12 and 14 rather than the pin member rotating in the narrow aperture locations 22 and 24. A relatively narrow pin arrangement with pin insertion and removal by hand without need for tools and with minimum clearance requirements is thus provided.
Having described the preferred embodiment, it will become apparent that various modifications can be made without departing from the scope of the invention as defined in the accompanying claims.
Pins are used at numerous locations on implements to connect two or more structures which rotate or otherwise move relative to each other. With the relative movement of the structures, there is a tendency for the connecting pin to rotate also. Often to reduce pin and pin support wear and to maintain a desired pin orientation, an anti-rotation device is employed to fix the pin against rotation. Some current weldments with anti-rotation devices fix the connecting pin with a tube and a through hole arrangement.
Such devices can significantly increase clearance requirements and often include costly tubing wherein the inner diameter has to be held to close tolerances. Further, removing the pin can be difficult or require specified torque values be applied when reinstalling the pin or other hardware.
BRIEF SUMMARY OF THE INVENTION
It is therefore an object of the present invention to provide an improved anti-rotation pin structure. It is a further object to provide such a structure which overcomes most or all of the aforementioned problems.
It is a further object of the present invention to provide an improved anti-rotation pin structure which is simple and relatively inexpensive in construction and easy to attach and remove. It is a further object to provide such a structure which obviates tube and through hole arrangements.
It is another object to provide an improved anti-rotation pin structure which facilitates removal and reinstallation of the pin without requiring tools or torque specifications. It is yet another object to provide such a pin structure which is easy to manufacture and is particularly adaptable to laser cutting techniques.
A pin retainer constructed in accordance with the teachings of the present invention includes a retainer laser cut from flat stock to include a pin-receiving opening with opposing grooves which are adapted to receive the ends of a cross pin or spring pin. In an alternate embodiment, the retainer shape can be designed directly into a pin support casting. The retainer is secured to one side of the pin support structure with the pin-receiving opening aligned with a corresponding pin opening in the pin support structure to receive a simple support pin having small bores extending diametrically through its ends. The spring pin is inserted through one of the bores with the ends of the spring pin projecting radially outwardly a short distance from opposite sides of the support pin. The end of the support pin opposite the spring pin end is inserted through the openings until the projecting spring pin ends seat in the opposing grooves. Thereafter, a quick lock pin is inserted through the bore in the end opposite the spring pin end to fix the spring pin inside the pin retainer and lock the support pin against rotation.
The pin construction is simple and inexpensive, and easy to attach and remove.
Tubes having inner diameters with close tolerances are eliminated, and clearance requirements are kept to a minimum. The spring pin and quick lock pin arrangement is easy and inexpensive to manufacture, and the support pin can be easily removed and reinstalled without tools or special torque requirements. Once installed, the support pin is held against rotation by the retainer.
These and other objects, features and advantages of the present invention will become apparent to one skilled in the art upon reading the following detailed description in view of the drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a side view of a portion of a connecting structure showing the retainer and the spring pin end of the connecting pin.
FIG. 2 is a front view of the connecting structure of FIG. 1.
FIG. 3 is a plan view of the connecting pin of FIGS. 1 and 2.
FIG. 4 is a perspective view of a portion of one side of the connecting structure of FIG. 1 with the connecting pin removed to more clearly show the details of the retainer.
DETAILED DESCRIPTION OF THE DRAWINGS
Referring now to FIGS. 1 and 2, therein is shown connecting structure 10 for an implement or the like (not shown). The connecting structure 10 includes first and second parallel spaced plates or elements 12 and 14 with outer sidewalls 12a and 14a.
The structure 10 is attached to a first portion of the implement and a supported element 18, such as a cylinder end or a beam connected to a second portion of the implement, is pivotally connected between the plates at aperture locations 22 and 24 by connecting pin structure indicated generally at 28. A pin anti-rotation retainer 30 is secured to the outer sidewall 12a and receives one end of the pin structure 28.
The pin structure 28 includes a cylindrical pin member 38 having a shaft axis 38a and opposed beveled ends 42 and 44. The ends 42 and 44 include small bores 62 and 64 which are parallel to each other and extend through the diameter of the member (perpendicular to the shaft axis 38a). A small cross pin such as a spring pin or roll pin 72 is inserted into the bore 62 and extends radially outwardly a short distance from the outer surface of the pin member 38 (FIGS. 1 and 2). The cross pin 72 can also be solid if the specific joint requires a stronger pin. The spacing between the bores 62 and 64 is greater than the spacing between the outer sidewalls 12a and 14a so that insertionlremoval of pin 74 by hand is unhindered. The spacing, however, is small enough so there is insufficient axial movement of the pin 38 to disengage pin 72 from the retainer 30.
A conventional quick attach pin 74 (FIG. 2) is selectively insertable into and removable from the bore 64. The quick attach pin 74 includes a stepped end 76 pivotally supporting a locking bail 78 that is rotatable upwardly from a locking position (shown) encircling the end 44 when the pin shank is supported in the bore 64 to an unlocking position (not shown) offset outwardly from the end. When the bail 78 is in the unlocking position, the shank of the pin 74 can be slid into and out of the bore 64 by hand independently of tools.
The anti-rotation retainer 30 is preferably laser cut and fabricated from flat stock to include a central aperture 82 which, when the retainer is secured to the side 12a, aligns with the apertures 22 and 24 (FIG. 4). The retainer 30 may be cast integrally with the element 12 rather than laser cut. The aperture 82 has a diameter approximately equal to but slightly greater than the diameter of the pin member 38. Diametrically opposed grooves or spring pin-receiving recesses 86 and 88 project outwardly from the aperture 82 and have a depth slightly greater than the diameter of the spring pin 72.
Initially, the spring pin 72 is inserted in the bore 62 of the pin member 38.
The opposite end 44 of the pin member 38 is then inserted through the aperture locations 22 and 24 and through a bore in the supported element 18. The end 44 of the pin member 38 extends through a washer 90 which abuts the sidewall 14a (FIG. 2). The radially projecting ends of the spring pin 72 seat in the grooves 86 and 88 with the beveled end 42 projecting only a small amount axially from the outer wall of the retainer 30. The shank of the pin 74 is inserted through the bore 64, and the bail 78 is rotated downwardly (as seen in FIG. 2) over the end 44 to retain the pin 74 in position. The grooves 86 and 88 secure the pin member 38 against rotation relative to the plates 12 and 14 so that the supported element 18 rotates on the wide surface of the pin member between the sidewalls 12 and 14 rather than the pin member rotating in the narrow aperture locations 22 and 24. A relatively narrow pin arrangement with pin insertion and removal by hand without need for tools and with minimum clearance requirements is thus provided.
Having described the preferred embodiment, it will become apparent that various modifications can be made without departing from the scope of the invention as defined in the accompanying claims.
Claims (14)
1. An implement pin structure for pivotally connecting relatively movable first and second members including pin-receiving apertures, the pin structure comprising:
a cylindrical pin of preselected diameter having an outer surface, a shaft axis and first and second opposed ends, the first and second ends including respective first and second bores extending perpendicularly to the axis;
a cross pin supported within the first bore and including an outermost end extending radially outwardly from the outer surface;
anti-rotation structure connected to the first apertured member including an aperture and a cross pin receiving groove extending radially from the aperture;
the cylindrical pin insertable through the anti-rotation structure aperture and through the pin-receiving apertures in the first and second members, wherein the outermost end of the cross pin seats in the groove to thereby prevent rotation of the cylindrical pin relative to the first apertured member; and a locking pin selectively insertable and removable from the second bore and limiting axial movement of the cylindrical pin relative to the first apertured member to thereby retain the outermost end of the cross pin in the cross pin receiving groove.
a cylindrical pin of preselected diameter having an outer surface, a shaft axis and first and second opposed ends, the first and second ends including respective first and second bores extending perpendicularly to the axis;
a cross pin supported within the first bore and including an outermost end extending radially outwardly from the outer surface;
anti-rotation structure connected to the first apertured member including an aperture and a cross pin receiving groove extending radially from the aperture;
the cylindrical pin insertable through the anti-rotation structure aperture and through the pin-receiving apertures in the first and second members, wherein the outermost end of the cross pin seats in the groove to thereby prevent rotation of the cylindrical pin relative to the first apertured member; and a locking pin selectively insertable and removable from the second bore and limiting axial movement of the cylindrical pin relative to the first apertured member to thereby retain the outermost end of the cross pin in the cross pin receiving groove.
2. The pin structure as set forth in claim 1 wherein the locking pin comprises a shank slidable by hand within the second bore independently of any tools.
3. The pin structure as set forth in claim 1 wherein the cross pin includes opposed ends extending radially outwardly from the outer surface of the cylindrical pin, and the cross pin receiving groove extends radially from opposite sides of the aperture in the anti-rotation structure.
4. The pin structure as set forth in claim 1 wherein the anti-rotation structure comprises a flat piece of laser cut stock fixed to the first member.
5. The pin structure as set forth in claim 1 wherein the anti-rotation structure is cast integrally with first member and comprises an outward projection.
6. The pin structure as set forth in claim 1 wherein the anti-rotation structure comprises a thin member projecting outwardly from the first member, and wherein the first end of the cylindrical pin is substantially contained within the thin member when the cross pin is seated in the groove.
7. The pin structure as set forth in claim 2 wherein the locking pin further includes a stepped end connected to the shank and a locking bail rotatably supported by the stepped end and movable to a locking position encircling the second end of the cylindrical pin.
8. The pin structure as set forth in claim 1 wherein the opposed ends of the cross pin are spaced a preselected distance apart, the anti-rotation structure aperture has a diameter approximately equal to but slightly greater than the diameter of the cylindrical pin, and the groove has ends spaced a distance approximately equal to but greater than the preselected distance.
9. The pin structure as set forth in claim 1 wherein the cross pin comprises a cross pin.
10. In an implement including connecting structure having first and second apertured plates with spaced outer sidewalls, and an apertured element, connecting pin structure pivotally connecting the apertured element to the apertured plates, the connecting pin structure comprising:
a pivot pin of preselected diameter having opposed first and second ends spaced a distance apart greater than the spacing between the outer sidewalls;
a cross pin extending radially outwardly from the first end of the pivot pin;
the second end of the pin including a second end bore extending through the diameter, the second end insertable through the apertured plates and apertured element with the second end bore extending outwardly of the outer sidewall of the second plate;
an anti-rotation retainer secured to the outer sidewall of the first plate and receiving first end of the pivot pin, the retainer including a groove for receiving a portion of the cross pin; and a hand operated locking pin selectively lockable in the bore for limiting axial movement of the pivot pin and maintaining the portion of the cross pin in the groove to thereby prevent rotation of the pivot pin relative to the first plate.
a pivot pin of preselected diameter having opposed first and second ends spaced a distance apart greater than the spacing between the outer sidewalls;
a cross pin extending radially outwardly from the first end of the pivot pin;
the second end of the pin including a second end bore extending through the diameter, the second end insertable through the apertured plates and apertured element with the second end bore extending outwardly of the outer sidewall of the second plate;
an anti-rotation retainer secured to the outer sidewall of the first plate and receiving first end of the pivot pin, the retainer including a groove for receiving a portion of the cross pin; and a hand operated locking pin selectively lockable in the bore for limiting axial movement of the pivot pin and maintaining the portion of the cross pin in the groove to thereby prevent rotation of the pivot pin relative to the first plate.
11. The connecting pin structure set forth in claim 10 wherein the anti-rotation retainer comprises a flat member projecting from the outer sidewall of the first plate and having an apertured portion for receiving the pivot pin, the first end of the pivot pin being substantially retained within the apertured portion when the locking pin is locked in the bore, wherein the groove comprises a radial extension of the apertured portion for receiving an outermost portion of the cross pin.
12. The connecting pin structure as set forth in claim 11 wherein the first end includes a first end bore and wherein the cross pin is secured in the first end bore.
13. The connecting structure as set forth in claim 12 wherein the cross pin comprises a spring pin.
14. The connecting structure as set forth in claim 12 wherein the spacing between the first end bore and the second end bore prevents movement of the cross pin from the groove while permitting unhindered insertion and removal of the locking pin by hand.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US14858498A | 1998-09-04 | 1998-09-04 | |
| US09/148,584 | 1998-09-04 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2274237A1 CA2274237A1 (en) | 2000-03-04 |
| CA2274237C true CA2274237C (en) | 2004-02-03 |
Family
ID=31186256
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2274237 Expired - Fee Related CA2274237C (en) | 1998-09-04 | 1999-06-10 | Retainer for non-rotating connecting pin |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2274237C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114542569A (en) * | 2022-02-22 | 2022-05-27 | 贵州詹阳动力重工有限公司 | Shaft end limiting device |
-
1999
- 1999-06-10 CA CA 2274237 patent/CA2274237C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CA2274237A1 (en) | 2000-03-04 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |