CA1295493C - Wheel unbalance measuring device and process - Google Patents
Wheel unbalance measuring device and processInfo
- Publication number
- CA1295493C CA1295493C CA000533219A CA533219A CA1295493C CA 1295493 C CA1295493 C CA 1295493C CA 000533219 A CA000533219 A CA 000533219A CA 533219 A CA533219 A CA 533219A CA 1295493 C CA1295493 C CA 1295493C
- Authority
- CA
- Canada
- Prior art keywords
- motor vehicle
- reference mark
- unbalance
- measuring device
- housing
- 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 - Fee Related
Links
- 238000000034 method Methods 0.000 title claims abstract description 8
- 230000008569 process Effects 0.000 title claims abstract description 8
- 239000007858 starting material Substances 0.000 claims abstract description 9
- 238000005259 measurement Methods 0.000 claims 1
- 238000006243 chemical reaction Methods 0.000 description 2
- 235000019504 cigarettes Nutrition 0.000 description 2
- BSYNRYMUTXBXSQ-UHFFFAOYSA-N Aspirin Chemical compound CC(=O)OC1=CC=CC=C1C(O)=O BSYNRYMUTXBXSQ-UHFFFAOYSA-N 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M1/00—Testing static or dynamic balance of machines or structures
- G01M1/14—Determining imbalance
- G01M1/16—Determining imbalance by oscillating or rotating the body to be tested
- G01M1/28—Determining imbalance by oscillating or rotating the body to be tested with special adaptations for determining imbalance of the body in situ, e.g. of vehicle wheels
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Of Balance (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Abstract
400.15 WHEEL UNBALANCE MEASURING DEVICE AND PROCESS
Abstract Of The Disclosure Determination of the unbalance of driven wheels of a motor vehicle with an unbalance measuring device including vibration converters and reference mark scanners is accomplished by supply-ing direct current from the direct current source present in the motor vehicle or in a starter device. A single person conducts the field balancing of the wheels of a motor vehicle and an adjustment of the vehicle wheels to a reference mark scanner. Hazards produced in connecting the measuring de-vices to alternating current are thereby avoided.
Abstract Of The Disclosure Determination of the unbalance of driven wheels of a motor vehicle with an unbalance measuring device including vibration converters and reference mark scanners is accomplished by supply-ing direct current from the direct current source present in the motor vehicle or in a starter device. A single person conducts the field balancing of the wheels of a motor vehicle and an adjustment of the vehicle wheels to a reference mark scanner. Hazards produced in connecting the measuring de-vices to alternating current are thereby avoided.
Description
~ ~C~ 3 i. I
1, .
Background Of The Invention ' A process is described for the determination of unbalance, on driven wheels of a motor vehicle with an unbalance measuring device including vibration converters and reference mark scanners.
A device is described for the supply of direct current to the unbalance measuring device, arranged on the motor vehicle, in- l cluding starter, vibration converter and reference mark scanner. ¦
A prospectus of the ~ofmann Co. "~ew Quality Dimensions and Rationalization by Infrared Scanning Finish Balancer 1 pi"
dated February 1984 discloses an unbalance measuring device with ¦
vibration converters and reference mark scanner. The electric I power supply for the unbalance measuring device as well as the associated auxiliary instruments takes place in this case with alternating current. In addition to the limited usability of such a device as a result o the dependence on an alternating current circuit, the risk also exists that dangerous potential differences between the vehicle frame insulated in place over the wheels of the motor vehicle and the operator of the unbalance measuring device may occur, which places the life of the operator¦
in jeopardy. This applies, in particular, when the wheels of tractor-trailers or articulated buses in an~J type of weather can I only be balanced outside~ Independent of these hazards, induc-tion loops as a result of the spatial expansion -- motor vehicle, truck, articulated bus -- of such a measuring arrangement may be ~ produced, which can influence the measured result, for example,!1~ as indicator fluctuations or even falsi~y the measured result.
The use of known balancing devices including the auxiliary instruments requires that the motor vehicle to be checked i8 aligned with the measuring device, in particular, for scanning , 3il~
1, .
Background Of The Invention ' A process is described for the determination of unbalance, on driven wheels of a motor vehicle with an unbalance measuring device including vibration converters and reference mark scanners.
A device is described for the supply of direct current to the unbalance measuring device, arranged on the motor vehicle, in- l cluding starter, vibration converter and reference mark scanner. ¦
A prospectus of the ~ofmann Co. "~ew Quality Dimensions and Rationalization by Infrared Scanning Finish Balancer 1 pi"
dated February 1984 discloses an unbalance measuring device with ¦
vibration converters and reference mark scanner. The electric I power supply for the unbalance measuring device as well as the associated auxiliary instruments takes place in this case with alternating current. In addition to the limited usability of such a device as a result o the dependence on an alternating current circuit, the risk also exists that dangerous potential differences between the vehicle frame insulated in place over the wheels of the motor vehicle and the operator of the unbalance measuring device may occur, which places the life of the operator¦
in jeopardy. This applies, in particular, when the wheels of tractor-trailers or articulated buses in an~J type of weather can I only be balanced outside~ Independent of these hazards, induc-tion loops as a result of the spatial expansion -- motor vehicle, truck, articulated bus -- of such a measuring arrangement may be ~ produced, which can influence the measured result, for example,!1~ as indicator fluctuations or even falsi~y the measured result.
The use of known balancing devices including the auxiliary instruments requires that the motor vehicle to be checked i8 aligned with the measuring device, in particular, for scanning , 3il~
,.
ii493 the mar~s provided on the motor vehicle wheel. This requires several trial runs for the purpose of reco~nizing the marks on the wheels which is not only cumbersome but also burdens the en-vironment as a result of additionally emitted exhaust gas. In addition, a remote control operation for measuring unbalance of two drive wheels from the driver's seat requires a constant monitoring of the speed difference to prevent an overloading of the differential drive.
Sun~ary Of The Invention On this basis, the present invention has the objective of having one person conduct a field balancing of the wheels of a motor vehicle without the necessity of adjusting the wheels of the vehicle to a reference mark scanner and at the same time avoid the hazards in connecting the measuring instru-ments to alternating current. This objective is met by a pro-cess where direct current supply for the unbalance measurin~ de-vice, the vibration converters and the reference mark scanners is supplied from the motor vehicle battery. Each driven wheel is provided with a reference mark scanner and a vibration con-verter. Without a trial run and at constant speed produced by the o~erator by giving gas, the speed of each wheel is provided to the unbalance measuring device. In the appropriate speed range of the wheels in the same measuring run, the unbalance values are récorded and supplied to the unbalance measuring de-vice. The effects of potential differences between vehicle and ground which present a hazard to the operator are completely eliminated. The influences and mistakes occuring heretofore ~ith other arrangements are avoided.
The environmental burden as a result of the elimination of trial runs with internal combustion engines in adjusting the reference mark scanner is, moreover, reduced to a minimum.
., ~ -3-., , .1 i Tlle objectives of the invention are also attained by using the direct current source present in the motor vehicle, on one hand, or, on the other, by using a direct current source which can be built-in in the starter providing the required power for the measuring device as well as for the vibration con- ¦
verters and the reference mark scanners.
Devices for conducting the process of the invention and/or refinements thereof include at least one magnetic holding of the housing of the reference mark scanner on a mounting or on the starter and by providing control openings in the housing which assist in the determination whether the reaction of the reference mark scanner to the marks provided on the motor vehicle wheels I has taken place by manually moving the wheel marks in front of the reference mark scanner. If the reference mark scanner does not react to the marks on the wheel, the reference mark scanner, for example, an infrared scanner or sensor consisting of laser and diode can be easily adjusted to the required height and dis-tance with respect to the mark by the magnetic holding of the : housing on the mounting. In particular, for a one-man operation, the ~reqùent trial runs which-force the operator to leave the vehicle to:be checked and to use additional means such as vehicle ~acks not only to:`again align the vehicle with the reference mark scanner but also to~bring the vibration con~erters again in con-tact with the suspension o~ the motor vehicle wheel are el;~in~ted.
Brief Desc iption Of The Drawing The invention is explained in more detail in the follow-: ing drawing.
1:~ Figure 1 is a schematical perspective view showing a : reference mark scanner according to the present invention includ-j ing an unbalance measuring device and a power supply;
; -4-~:
~9~93 I
,, `
Figure 2 is a perspective view showing a starter with a reference mark scanner; and Figure 3 is a top plan view of a motor vehicle to be investigated illustrating the measuring process, according to the invention.
Detailed Description Of The Invention A housing 1 of a reference mark scanner has a side 2 facing a motor vehicle wheel. Side 2 has an opening 3 which is symmetrical to the center of housing 1 and in which an opto-receîver and optotransmitter (not shwon), for example, infrared, laser are accommodated. As a result of the symmetrical arrange-ment, the housing without further conversion can be used for each wheel on the motor vehicle ~8 a result of the arrangeMent of light-up control openings 4, 5 on top and bottom faces 17, 18, which are orthogonal to the side 2 and are essentially parallel to the contact surface of the motor vehicle tires, which open-ings light up when the optoreceiver sees the mark provided on the motor vehicle wheel, the reference mark scanner with its housing 1 can be adjusted to the motor vehicle tire without an additional trial run by only moving the wheel with its marking in front of the housing 1 with respect to the distance of the reference mark scanner to the motor vehicle tire. As a result of the arrangement of at least one magnetic mounting 6 on the back of the housing 1, the housing 1 carrying the reference mark scanner can be adjusted in height on a holder 7 relative to the motor vehicle wheel or as schematically shown in Figure 2 moved on a front face 16 of a starter 15 as shown with tne arrow.
The housing 1 is connected via a line 8 with an unbalance measuring device 9 which obtains its power according to the exem-plified embodiment of Figure 1 via a feed line 10 from a motor ~:
~, . `
' .
vehicle battery 11 via a connecting outlet 12, for example, the built-in cigarette lighter in the motor vehicle.
In the plan view of Figure 3, for example, for a four wheel drive vehicle, four housings 1 are provided which are fastened to four holders 7 via the mounting 6 described in Figure 1. After the vehicle is supported on vibration convereters 20, as shown in Figure 3, and also after the four housings 1 with reference mark scanners have been lined up with the wheels, the person makîng the investigation sits down behind the steering wheel 13, starts the vehicle and at an appropriate speed, records¦
the measured unbalance values from the vibration converters as well as the reference marks of the four reference mark scanners.
This information is fed to the unbalance measuring device 9 which o~tains its power via the electric cigarette lighter present in the vehicle The ieeding can take place with or without wires.
ii493 the mar~s provided on the motor vehicle wheel. This requires several trial runs for the purpose of reco~nizing the marks on the wheels which is not only cumbersome but also burdens the en-vironment as a result of additionally emitted exhaust gas. In addition, a remote control operation for measuring unbalance of two drive wheels from the driver's seat requires a constant monitoring of the speed difference to prevent an overloading of the differential drive.
Sun~ary Of The Invention On this basis, the present invention has the objective of having one person conduct a field balancing of the wheels of a motor vehicle without the necessity of adjusting the wheels of the vehicle to a reference mark scanner and at the same time avoid the hazards in connecting the measuring instru-ments to alternating current. This objective is met by a pro-cess where direct current supply for the unbalance measurin~ de-vice, the vibration converters and the reference mark scanners is supplied from the motor vehicle battery. Each driven wheel is provided with a reference mark scanner and a vibration con-verter. Without a trial run and at constant speed produced by the o~erator by giving gas, the speed of each wheel is provided to the unbalance measuring device. In the appropriate speed range of the wheels in the same measuring run, the unbalance values are récorded and supplied to the unbalance measuring de-vice. The effects of potential differences between vehicle and ground which present a hazard to the operator are completely eliminated. The influences and mistakes occuring heretofore ~ith other arrangements are avoided.
The environmental burden as a result of the elimination of trial runs with internal combustion engines in adjusting the reference mark scanner is, moreover, reduced to a minimum.
., ~ -3-., , .1 i Tlle objectives of the invention are also attained by using the direct current source present in the motor vehicle, on one hand, or, on the other, by using a direct current source which can be built-in in the starter providing the required power for the measuring device as well as for the vibration con- ¦
verters and the reference mark scanners.
Devices for conducting the process of the invention and/or refinements thereof include at least one magnetic holding of the housing of the reference mark scanner on a mounting or on the starter and by providing control openings in the housing which assist in the determination whether the reaction of the reference mark scanner to the marks provided on the motor vehicle wheels I has taken place by manually moving the wheel marks in front of the reference mark scanner. If the reference mark scanner does not react to the marks on the wheel, the reference mark scanner, for example, an infrared scanner or sensor consisting of laser and diode can be easily adjusted to the required height and dis-tance with respect to the mark by the magnetic holding of the : housing on the mounting. In particular, for a one-man operation, the ~reqùent trial runs which-force the operator to leave the vehicle to:be checked and to use additional means such as vehicle ~acks not only to:`again align the vehicle with the reference mark scanner but also to~bring the vibration con~erters again in con-tact with the suspension o~ the motor vehicle wheel are el;~in~ted.
Brief Desc iption Of The Drawing The invention is explained in more detail in the follow-: ing drawing.
1:~ Figure 1 is a schematical perspective view showing a : reference mark scanner according to the present invention includ-j ing an unbalance measuring device and a power supply;
; -4-~:
~9~93 I
,, `
Figure 2 is a perspective view showing a starter with a reference mark scanner; and Figure 3 is a top plan view of a motor vehicle to be investigated illustrating the measuring process, according to the invention.
Detailed Description Of The Invention A housing 1 of a reference mark scanner has a side 2 facing a motor vehicle wheel. Side 2 has an opening 3 which is symmetrical to the center of housing 1 and in which an opto-receîver and optotransmitter (not shwon), for example, infrared, laser are accommodated. As a result of the symmetrical arrange-ment, the housing without further conversion can be used for each wheel on the motor vehicle ~8 a result of the arrangeMent of light-up control openings 4, 5 on top and bottom faces 17, 18, which are orthogonal to the side 2 and are essentially parallel to the contact surface of the motor vehicle tires, which open-ings light up when the optoreceiver sees the mark provided on the motor vehicle wheel, the reference mark scanner with its housing 1 can be adjusted to the motor vehicle tire without an additional trial run by only moving the wheel with its marking in front of the housing 1 with respect to the distance of the reference mark scanner to the motor vehicle tire. As a result of the arrangement of at least one magnetic mounting 6 on the back of the housing 1, the housing 1 carrying the reference mark scanner can be adjusted in height on a holder 7 relative to the motor vehicle wheel or as schematically shown in Figure 2 moved on a front face 16 of a starter 15 as shown with tne arrow.
The housing 1 is connected via a line 8 with an unbalance measuring device 9 which obtains its power according to the exem-plified embodiment of Figure 1 via a feed line 10 from a motor ~:
~, . `
' .
vehicle battery 11 via a connecting outlet 12, for example, the built-in cigarette lighter in the motor vehicle.
In the plan view of Figure 3, for example, for a four wheel drive vehicle, four housings 1 are provided which are fastened to four holders 7 via the mounting 6 described in Figure 1. After the vehicle is supported on vibration convereters 20, as shown in Figure 3, and also after the four housings 1 with reference mark scanners have been lined up with the wheels, the person makîng the investigation sits down behind the steering wheel 13, starts the vehicle and at an appropriate speed, records¦
the measured unbalance values from the vibration converters as well as the reference marks of the four reference mark scanners.
This information is fed to the unbalance measuring device 9 which o~tains its power via the electric cigarette lighter present in the vehicle The ieeding can take place with or without wires.
Claims (4)
1. A process for the determination of unbalance on driven wheels of a motor vehicle with an unbalance measuring de-vice including vibration converters and reference mark scanners, the process comprising supplying direct current for the unbalance measuring device, vibration converters and reference mark scanners from the battery of the motor vehicle, providing each driven wheel with a reference mark scanner and a vibration converter, without trial run rotating the motor vehicle wheels transmitting the speed of each wheel to the unbalance measuring device, and recording the unbalance measurement values in the same measuring run.
2. A device for supplying an unbalance measuring device including starter and reference mark scanner and vibration con-verters with direct current, characterized in that a direct cur-rent source present in the motor vehicle or a direct current source present in the starter is connected with the unbalance measuring device and the reference mark scanner for the supply of direct current.
3. A device as in claim 2 wherein the reference mark scanner includes a housing with at least one magnetic mounting for aligning the housing with a motor vehicle wheel, a holder for the magnetic housing, the housing having a front face with an opening therein for an optotransmitter and an optoreceiver, and top and bottom faces arranged essentially parallel to the con-tact surface of the tire of the motor vehicle, and control open-ings in the top and bottom faces for aligning the housing rela-tive to the tire.
4. A device as in claim 3 wherein the holder is present on the starter.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/EP1986/000195 WO1987005999A1 (en) | 1986-03-29 | 1986-03-29 | Process and device for determining unbalance |
| EP86/00195 | 1986-03-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1295493C true CA1295493C (en) | 1992-02-11 |
Family
ID=8165109
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000533219A Expired - Fee Related CA1295493C (en) | 1986-03-29 | 1987-03-27 | Wheel unbalance measuring device and process |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP0295238B2 (en) |
| JP (1) | JPH01501816A (en) |
| CA (1) | CA1295493C (en) |
| DE (2) | DE3667539D1 (en) |
| WO (1) | WO1987005999A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5195369A (en) * | 1988-08-23 | 1993-03-23 | A. Rohe Gmbh | Apparatus for determining the unbalance of wheels mounted on a vehicle |
| DE3828610A1 (en) * | 1988-08-23 | 1990-03-29 | Rohe Gmbh A | DEVICE FOR DETERMINING THE BALANCE OF WHEELS MOUNTED ON A MOTOR VEHICLE |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1129477A (en) * | 1964-11-27 | 1968-10-09 | Hubert Roy Tebboth | Improvements in and relating to rotary balancing apparatus |
| DE1698111A1 (en) * | 1968-03-09 | 1971-06-16 | Automation Gmbh & Co | Device for determining the imbalance of wheels mounted on vehicles |
| US3726145A (en) * | 1970-06-18 | 1973-04-10 | Atco Inc | Apparatus for indicating magnitude of vibrations |
| DE2819687C2 (en) * | 1978-05-05 | 1986-04-30 | Kurt 7432 Urach Maurer | Method and device for balancing motor vehicle wheels |
| GB2027541B (en) * | 1978-07-15 | 1983-01-06 | Gkn Transmissions Ltd | Wheel balancer |
-
1986
- 1986-03-29 DE DE8686902390T patent/DE3667539D1/en not_active Expired - Fee Related
- 1986-03-29 DE DE19868690182 patent/DE8690182U1/en not_active Expired
- 1986-03-29 JP JP50246386A patent/JPH01501816A/en active Pending
- 1986-03-29 EP EP86902390A patent/EP0295238B2/en not_active Expired - Lifetime
- 1986-03-29 WO PCT/EP1986/000195 patent/WO1987005999A1/en active IP Right Grant
-
1987
- 1987-03-27 CA CA000533219A patent/CA1295493C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| EP0295238B1 (en) | 1989-12-13 |
| EP0295238B2 (en) | 1994-06-01 |
| WO1987005999A1 (en) | 1987-10-08 |
| DE3667539D1 (en) | 1990-01-18 |
| EP0295238A1 (en) | 1988-12-21 |
| JPH01501816A (en) | 1989-06-22 |
| DE8690182U1 (en) | 1989-01-19 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKLA | Lapsed |