Automatic rim centering system for a tyre changing machine
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B60C-025/132
G05B-024/00
출원번호
US-0170866
(2011-06-28)
등록번호
US-8544520
(2013-10-01)
발명자
/ 주소
Sotgiu, Paolo
출원인 / 주소
Snap-On Equipment SRL a Unico Socio
대리인 / 주소
McDermott Will & Emery LLP
인용정보
피인용 횟수 :
4인용 특허 :
3
초록▼
The invention concerns vehicle wheel service machines, in particular automatic tire changers, having a wheel or rim mounting device (2) which is mounted rotatably about an axis (11) and to which a wheel (1) is to be fixed. The vehicle wheel service machine comprises first and second detectors (6, 7)
The invention concerns vehicle wheel service machines, in particular automatic tire changers, having a wheel or rim mounting device (2) which is mounted rotatably about an axis (11) and to which a wheel (1) is to be fixed. The vehicle wheel service machine comprises first and second detectors (6, 7) and a controller to detect the rotational speeds of the rim mounting device (2) and the wheel (1) respectively. Furthermore, a method for controlling the rotational speed of the rim mounting device (2) is provided. If the detected rotational speeds are different, slipping is determined and eliminated by approximating the rotational speed of the rim mounting device (2) to that of the wheel (1). A rim mounting device (2) can comprise a rim mounting plate (23) having a rim support surface (24) with a high-friction lining adapted to increase friction between the rim mounting plate (23) and the wheel (1).
대표청구항▼
1. A vehicle wheel service machine, in particular a tyre changing machine, comprising: a rim mounting device (2) having a rotatable shaft (21) and a rim mounting plate (23) connected rotationally fixed to the shaft (21),a motor driven via a driving circuit and adapted to drive the rotatable shaft (2
1. A vehicle wheel service machine, in particular a tyre changing machine, comprising: a rim mounting device (2) having a rotatable shaft (21) and a rim mounting plate (23) connected rotationally fixed to the shaft (21),a motor driven via a driving circuit and adapted to drive the rotatable shaft (21) of the rim mounting device (2),a first detector adapted to detect the rotational speed of the rim mounting plate (23),a second detector adapted to detect the rotational speed of a wheel (1) mounted to the rim mounting plate (23), anda controller adapted to receive and compare output signals from the first and second detectors, wherein the controller outputs a control signal to the driving circuit of the motor to adapt the driving of the motor so that the rotational speed of the rim mounting plate (23) and the rotational speed of the wheel (1) are approximated to each other. 2. The vehicle wheel service machine according to claim 1, wherein the first detector is a device adapted to detect the rotational speed of the motor. 3. The vehicle wheel service machine according to according to claim 1 or 2, wherein the second detector detects the rotational speed of the wheel (1) by means of two sensing devices (6, 7) having sensing fields mutually displaced in rotational direction of the wheel (1), andthe rotational speed of the wheel (1) is determined using a time difference between respective detection events of a wheel feature passing the sensing fields of the sensing devices (6, 7). 4. The vehicle wheel service machine according to claim 3, wherein the second detector detects the rotational speed of the wheel (1) by means of a cross-correlation of the output signals of said sensing devices (6, 7). 5. The vehicle wheel service machine according to claim 1 or 2, wherein the second detector detects the rotational speed of the wheel (1) by means of a sensing device arranged to sense a portion of the wheel (1) in a substantially tangential sensing direction with respect to the rotation axis (11) of the wheel (1) based on the Doppler effect. 6. The vehicle wheel service machine according to claim 1 or 2, wherein the machine is one of a tyre changer and a wheel balancer. 7. The vehicle wheel service machine according to claim 1 or 2, wherein a rim support surface (24) of the rim mounting plate (23) comprises a high-friction lining adapted to increase friction between the rim mounting plate (23) and the wheel (1). 8. The device according to claim 7, wherein the high-friction lining is a coating applied to the rim support surface (24) of the rim mounting plate (23). 9. The device according to claim 7, wherein the high-friction lining is a separate high-friction component adapted to be arranged removable between the rim support surface (24) of the rim mounting plate (23) and the wheel (1). 10. The device according to claim 9, wherein the high-friction component is in positive locking engagement with the rim mounting plate (23). 11. A method for controlling the rotational speed of a rim mounting device of a vehicle wheel service machine, in particular a tyre changing machine, comprising the steps of: detecting a first rotational speed of a rim mounting plate (23) of the rim mounting device (2),detecting a second rotational speed of a wheel (1) mounted to the rim mounting device (2),comparing the first and second rotational speeds,determining that a slipping between the wheel (1) and the rim mounting plate (23) is present if the result of the comparison yields that the first and second rotational speeds are different, and,if presence of slipping is determined, adapting a driving of the rim mounting plate (23) so that the first rotational speed and the second rotational speed are approximated to each other. 12. The method according to claim 11, wherein the set rotational speed of the rim mounting plate (23) is iteratively increased or decreased by a specific speed value until a desired rotational speed of the rim mounting plate (23) corresponding to a desired rotational speed of the wheel (1) mounted to the rim mounting plate (23) is reached. 13. The method according to claim 11 or 12, wherein the desired rotational speed of the rim mounting plate (23) is adjusted if presence of slipping is determined, so that a probability of recurrence of slipping is reduced. 14. A computer program product comprising instructions which, if executed by a processor, cause the processor to carry out a method according to claim 11 or 12. 15. A computer-readable medium carrying a computer program product according to claim 14.
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이 특허에 인용된 특허 (3)
Colwell Dean A. ; Doan Paul George, Method for matchmounting an uniflated automobile tire on a wheel.
Lemser, Matthias; Lipponer, Georg; Steitz, Karl-Heinz; Rogalla, Martin; Peinelt, Andreas, Device and method for changing the rotational angle position of a pneumatic tire on a wheel rim.
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