GB2041159A - Shaft balance weights - Google Patents
Shaft balance weights Download PDFInfo
- Publication number
- GB2041159A GB2041159A GB8002123A GB8002123A GB2041159A GB 2041159 A GB2041159 A GB 2041159A GB 8002123 A GB8002123 A GB 8002123A GB 8002123 A GB8002123 A GB 8002123A GB 2041159 A GB2041159 A GB 2041159A
- Authority
- GB
- United Kingdom
- Prior art keywords
- shaft
- weight
- balance
- adhesive means
- adhesive
- 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.)
- Withdrawn
Links
- 239000000853 adhesive Substances 0.000 claims abstract description 27
- 230000001070 adhesive effect Effects 0.000 claims abstract description 27
- 238000000034 method Methods 0.000 claims abstract description 9
- 239000002390 adhesive tape Substances 0.000 claims abstract description 8
- 239000012790 adhesive layer Substances 0.000 abstract description 5
- 238000010438 heat treatment Methods 0.000 abstract description 4
- 230000001681 protective effect Effects 0.000 abstract description 3
- 239000000463 material Substances 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 239000010410 layer Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 239000000805 composite resin Substances 0.000 description 2
- 239000006260 foam Substances 0.000 description 2
- 239000011888 foil Substances 0.000 description 2
- 239000012943 hotmelt Substances 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 229920002457 flexible plastic Polymers 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 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
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/32—Correcting- or balancing-weights or equivalent means for balancing rotating bodies, e.g. vehicle wheels
- F16F15/34—Fastening arrangements therefor
-
- 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
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C3/00—Shafts; Axles; Cranks; Eccentrics
- F16C3/02—Shafts; Axles
-
- 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
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/32—Correcting- or balancing-weights or equivalent means for balancing rotating bodies, e.g. vehicle wheels
- F16F15/322—Correcting- or balancing-weights or equivalent means for balancing rotating bodies, e.g. vehicle wheels the rotating body being a shaft
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Aviation & Aerospace Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Testing Of Balance (AREA)
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
Abstract
A balance-weight element (10) is first attached to a rotary shaft (12) temporarily by a first adhesive means, e.g. an adhesive tape, (13) after removing its protective strip (14). Checking of shaft balance is permitted while the weight is temporarily attached, and it can be repositioned if required. An inner surface of element (10), shaped approximately to conform with the shaft surface, is provided with a second adhesive layer (11) which can be activated substantially by a treatment process such as heating, thereby securing element (10) permanently to the shaft. <IMAGE>
Description
SPECIFICATION
Balancing of shafts
This invention relates to the balancing of rotary shafts. The invention has been developed in relation to transmission shafts of the type usually referred to as propeller shafts, for motor vehicles, and is particularly, although not exclusively, applicable to the balancing of shafts made of a fibre reinforced resin composite material.
Hitherto, motor vehicle transmission shafts have usually been made of steel tube with appropriate torque transmitting end fittings, e.g. universal joints, secured thereto, and the procedure for balancing such a shaft has been to place it in a balancing machine in which the shaft is rotated so that a reading can be obtained of the magnitude and position of extra weight needed to be applied to the shaft to balance it, an appropriate balancing weight or weights then being spot welded to the shaft. Such a method of attachment is not possible in the case of a composite shaft as it is not a material which can be welded.
It is the object of the present invention to provide for balancing of a shaft which is of composite or other material which cannot be readily welded, although it will be appreciated that the invention is also applicable to shafts of steel or other easily weldable material.
According to one aspect of the present invention, we provide a balance weight for application to a rotary shaft, comprising a weight element having a surface shaped to conform to the surface of a shaft to which it is to be applied, a first adhesive means for securing the weight element temporarily to the shaft, and a second adhesive means provided on said surface of the weight element and capable of being activated on subjection thereof to suitable treatment permanently to secure the weight element to the shaft.
The first adhesive means preferably comprises an adhesive tape which adheres to the material of the shaft on contact therewith.
There is then preferably provided a removable protective layer for said tape for preventing the latter from adhering before it is required.
The second adhesive means may comprise a substance capable of being caused to adhere to the shaft surface upon the application of heat, and typically may thus be a thermosetting adhesive which is caused to adhere by chemical reaction when heated, or a "hot melt" adhesive.
Heat may be applied to the balance weight by the contact of a hot element therewith.
According to a further aspect of the invention, we provide a method of balancing a rotary shaft, comprising rotating the shaft in a balancing machine and obtaining a reading of corrective weight needed to be applied to the shaft to balance same, applying an appropriate weight or weights to the shaft and holding
it or them in position temporarily by first adhesive means, again rotating the shaft to check the balance thereof, and subjecting the weight or weights to treatment to activate second adhesive means associated therewith and permanently to secure the weight or weights to the shaft.
The invention will now be described by way of example with reference to the accompanying drawings, of which
Figure 1 illustrates the application of a weight according to the invention to a shaft
Figure 2 is an exploded perspective view of the balance weight
Referring to the drawings, there is illustrated a balance weight which comprises a weight element 10 which is a rectangular piece of sheet metal, e.g. steel, with an arcuate cross-sectional shape to conform generally to the external surface of a shaft to which the weight is to be applied. It does not have to conform exactly to the curvature of the shaft surface, but merely be of approximately the correct curvature. The concave surface of the weight element 10 is provided with a layer 11 of heat sensitive adhesive of a type which can be activated by heating, e.g. a thermo-plastic (hot melt) adhesive, or a thermo-setting adhesive.The layer 11 is relatively thick to allow for any surface roughness of the shaft (1 2) to which the weight is to be applied, and may incorporate or be a foam substance, e.g. a flexible plastics foam, as a means of providing a relatively thick adhesive layer.
The balance weight is further provided with an adhesive means for temporarily securing the weight element to the shaft, in the form of an adhesive tape 1 3 which extends over the back of the weight element 10, and has an adhesive layer which adheres on contact with the shaft. The tape 1 3 may be a metal foil. A protective backing strip 1 4 is provided for preventing the tape 1 3 from adhering to anything until it is required to do so, the strip 14 being treated so as only to adhere lightly to the adhesive tape 1 3.
In order to balance a rotary shaft by use of a balance weight as above described, the shaft 1 2 is first rotated in a balancing machine and a reading obtained of the magnitude and position of weight needed to be applied to the shaft to balance it. A suitable weight or weights would then be selected from a range of different sizes of weight, and such weights temporarily applied to the shaft by use of adhesive tape 1 3 having removed protective strip 1 4. The shaft would then again be rotated to check that it is in the desired state of balance. If it is satisfactory, the weights would be permanently secured to the shaft by application of heated elements to the weights, or by other heating means, to activate their adhesive layers 11.If balance is not satisfactory, the weights can be removed, re-positioned, and the balance of the shaft again tested before the weights are permanently fixed to the shaft by use of the heat sensitive adhesive thereon.
The adhesive tape 1 3 associated with each weight can be left in position, or removed if desired.
In possible modifications of the invention, the adhesive layer 11 could be activated by a method other than heating, e.g. irradiation, or the adhesive tape could be of a substance other than a metal foil, e.g. paper or plastics provided that it does not degrade under the treatment to cause the main adhesive to operate.
Further, although the invention can with particular advantage be applied to balancing of fibre-resin composite shafts, the method could also be used to secure balance weights to aluminium or steel shafts. Clearly the type of adhesive used in the layer 11 would be selected so as to ensure satisfactory permanent adhesive to the material of which the shaft is made. A wide range of suitable adhesives is commercially available.
Claims (8)
1. A balance weight for application to a rotary shaft, comprising a weight element having a surface shaped substantially to conform to the surface of a shaft to which it is to be applied, a first adhesive means for securing the weight element temporarily to the shaft, and second adhesive means on said surface of the weight element and capable of being activated on subjection of the weight element to suitable treatment permanently to secure the weight element to the shaft.
2. A balance weight according to claim 1 wherein the first adhesive means comprises an adhesive tape.
3. A balance weight according to claim 1 wherein said second adhesive means comprises an adhesive which is sensitive to heat.
4. A balance weight according to claim 1 wherein said second adhesive means comprises a relatively thick layer on said weight element surface for accommodating slight disconformity between said surface and said shaft surface.
5. A method of balancing a rotary shaft, comprising rotating a shaft in a balancing machine and obtaining a reading of corrective weight needed to be applied to the shaft to balance same, applying at least one appropriate weight to the shaft and holding said at least one weight in position temporarily by first adhesive means, again rotating the shaft to check the balance thereof, and subjecting said least one weight to treatment to activate a second adhesive means associated therewith and permanently to secure the weight or weights to the shaft.
6. A method according to claim 5 wherein said second adhesive means is sensitive to heat, and said treatment comprises contacting the weight or weights with a heated element.
7. A balance weight substantially as hereandbefore described with reference to and as shown in the accompanying drawings.
8. A method of balancing a rotary shaft, substantially as hereandbefore described.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8002123A GB2041159A (en) | 1979-01-31 | 1980-01-22 | Shaft balance weights |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB7903467 | 1979-01-31 | ||
| GB8002123A GB2041159A (en) | 1979-01-31 | 1980-01-22 | Shaft balance weights |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB2041159A true GB2041159A (en) | 1980-09-03 |
Family
ID=26270412
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8002123A Withdrawn GB2041159A (en) | 1979-01-31 | 1980-01-22 | Shaft balance weights |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2041159A (en) |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4887989A (en) * | 1987-12-28 | 1989-12-19 | A. O. Smith Corporation | Dynamically balanced driveshaft and method of producing the same |
| US4895551A (en) * | 1987-09-24 | 1990-01-23 | A. O. Smith Corporation | Dynamically balanced drive shaft |
| DE3913493C1 (en) * | 1989-04-25 | 1990-01-25 | Loehr & Bromkamp Gmbh, 6050 Offenbach, De | Attaching balance wt. to rotating member - using adhesive cured with artificial light |
| EP0385160A1 (en) * | 1989-02-28 | 1990-09-05 | GKN Cardantec International Gesellschaft für Antriebstechnik mbH | Fixation of a balancing weight on a rotating shaft, especially for a universal joint |
| DE9013697U1 (en) * | 1990-06-26 | 1991-10-31 | Nuovakautschuk GmbH, 8499 Traitsching | Counterweight for balancing rotating components |
| US5234378A (en) * | 1990-08-06 | 1993-08-10 | Ford Motor Company | Balanced rotary assembly |
| FR2687747A1 (en) * | 1992-02-21 | 1993-08-27 | Glaenzer Spicer Sa | BALANCING MASSELOT OF A MOTOR VEHICLE TRANSMISSION. |
| GB2275520A (en) * | 1993-01-29 | 1994-08-31 | Ian Cowen | Optical data disk balancer |
| US5778737A (en) * | 1983-09-29 | 1998-07-14 | Dana Corporation | Balance weight and method of securing same to a rotatable tubular body |
| US6123623A (en) * | 1996-03-22 | 2000-09-26 | Unisia Jecs Corporation | Vehicle propeller shaft with a balance corrector |
| US6450890B1 (en) * | 1997-10-24 | 2002-09-17 | Michael D. Hendrian | Minimal mass hollow balance shaft |
| GB2383624A (en) * | 2001-12-13 | 2003-07-02 | Visteon Global Tech Inc | Balancing weight for rotating shaft |
| EP1460287A1 (en) * | 2003-03-18 | 2004-09-22 | Spicer Gelenkwellenbau GmbH & Co. KG | Balancing weight for a cardan shaft |
| WO2012064335A1 (en) | 2010-11-12 | 2012-05-18 | Bell Helicopter Textron Inc. | Composite rotor blade having weighted material for mass balancing |
-
1980
- 1980-01-22 GB GB8002123A patent/GB2041159A/en not_active Withdrawn
Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5778737A (en) * | 1983-09-29 | 1998-07-14 | Dana Corporation | Balance weight and method of securing same to a rotatable tubular body |
| US6032551A (en) * | 1983-09-29 | 2000-03-07 | Dana Corporation | Balance weight and method of securing same to a rotatable tubular body |
| US4895551A (en) * | 1987-09-24 | 1990-01-23 | A. O. Smith Corporation | Dynamically balanced drive shaft |
| US4887989A (en) * | 1987-12-28 | 1989-12-19 | A. O. Smith Corporation | Dynamically balanced driveshaft and method of producing the same |
| EP0385160A1 (en) * | 1989-02-28 | 1990-09-05 | GKN Cardantec International Gesellschaft für Antriebstechnik mbH | Fixation of a balancing weight on a rotating shaft, especially for a universal joint |
| DE3913493C1 (en) * | 1989-04-25 | 1990-01-25 | Loehr & Bromkamp Gmbh, 6050 Offenbach, De | Attaching balance wt. to rotating member - using adhesive cured with artificial light |
| DE9013697U1 (en) * | 1990-06-26 | 1991-10-31 | Nuovakautschuk GmbH, 8499 Traitsching | Counterweight for balancing rotating components |
| US5234378A (en) * | 1990-08-06 | 1993-08-10 | Ford Motor Company | Balanced rotary assembly |
| FR2687747A1 (en) * | 1992-02-21 | 1993-08-27 | Glaenzer Spicer Sa | BALANCING MASSELOT OF A MOTOR VEHICLE TRANSMISSION. |
| GB2275520A (en) * | 1993-01-29 | 1994-08-31 | Ian Cowen | Optical data disk balancer |
| US6123623A (en) * | 1996-03-22 | 2000-09-26 | Unisia Jecs Corporation | Vehicle propeller shaft with a balance corrector |
| US6450890B1 (en) * | 1997-10-24 | 2002-09-17 | Michael D. Hendrian | Minimal mass hollow balance shaft |
| GB2383624A (en) * | 2001-12-13 | 2003-07-02 | Visteon Global Tech Inc | Balancing weight for rotating shaft |
| US6701802B2 (en) | 2001-12-13 | 2004-03-09 | Visteon Global Technologies, Inc. | Balancing weight for a rotating shaft |
| GB2383624B (en) * | 2001-12-13 | 2004-04-28 | Visteon Global Tech Inc | Balancing weight for a rotatable shaft |
| EP1460287A1 (en) * | 2003-03-18 | 2004-09-22 | Spicer Gelenkwellenbau GmbH & Co. KG | Balancing weight for a cardan shaft |
| WO2012064335A1 (en) | 2010-11-12 | 2012-05-18 | Bell Helicopter Textron Inc. | Composite rotor blade having weighted material for mass balancing |
| CN103209890A (en) * | 2010-11-12 | 2013-07-17 | 贝尔直升机泰克斯特龙公司 | Composite rotor blade having weighted material for mass balancing |
| EP2619086A4 (en) * | 2010-11-12 | 2013-07-31 | Bell Helicopter Textron Inc | COMPOSITE ROTOR BLADE WITH WEIGHTED MATERIAL FOR MASS BALANCING |
| CN103209890B (en) * | 2010-11-12 | 2015-09-16 | 贝尔直升机泰克斯特龙公司 | There is the composite rotor blade of the weight material for balancing of mass |
| US9487290B2 (en) | 2010-11-12 | 2016-11-08 | Textron Innovations Inc. | Composite rotor blade having weighted material for mass balancing |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |