Driving system having reduced vibration transmission
A driving system has a driving motor body operative to produce a driving force for driving an object to move in reciprocating directions. A pivotal support is located between the driving motor body and a machine base for supporting the driving motor body on the machine base. The pivotal support causes at least a portion of the driving motor body to rotate relative to the machine base in an opposite direction to a direction of the driving force produced by the driving motor body to drive the object, so as to reduce vibration transmission to the machine base.
1. A driving system for reducing vibration transmission from a driving motor to a machine base, the driving system comprising:
a driving motor body operative to produce a driving force for driving an object to move in reciprocating directions;
a pivotal support for supporting the driving motor body, the pivotal support being located between the driving motor body and the machine base; wherein the pivotal support is operative to cause at least a portion of
the driving motor body to rotate relative to the machine base in an opposite direction to a direction of the driving force produced by the driving motor body to drive the object.
2. The driving system as claimed in claim 1 , wherein the pivotal support comprises a resilient structure.
3. The driving system as claimed in claim 2 , wherein the resilient structure comprises one or more leaf springs.
4. The driving system as claimed in claim 3 , wherein the resilient structure comprises a pair of leaf springs that intersect each other at a rotational pivot point that allows the at least a portion of the driving motor body to rotate relative to the machine base about the rotational pivot point.
5. The driving system as claimed in claim 3 , wherein a rotational pivot point of the resilient support is a virtual rotational pivot point that allows the at least a portion of the driving motor body to rotate relative to the machine base about the virtual pivot point.
6. The driving system as claimed in claim 5 , wherein the one or more leaf springs form a “V” shape, with a base of such “V” shape located at the machine base.
7. The driving system as claimed in claim 3 , wherein a rotational pivot point of the resilient support is an infinite pivot point that allows the at least a portion of the driving motor body to rotate relative to the machine base about the infinite pivot point.
8. The driving system as claimed in claim 7 , wherein the resilient structure comprises a pair of vertically-arranged leaf springs connecting respective points on the at least a portion of the driving motor body to corresponding positions on the machine base.
9. The driving system as claimed in claim 3 , wherein the resilient structure comprises a single leaf spring on which the at least a portion of the driving motor body is arranged to hang.
10. The driving system as claimed in claim 3 , wherein the resilient structure comprises one or more leaf springs with an “S”-shaped cross-section.
11. The driving system as claimed in claim 1 , wherein the driving motor body comprises a motor driving coil and a motor driving magnet, which are arranged with sufficient space between the motor driving coil and a motor driving magnet in order to maintain a gap between them during rotational motion of the at least a portion of the driving motor body.
12. The driving system as claimed in claim 11 , wherein the object is connected to either the motor driving coil or the motor driving magnet for driving the object to move.
13. The driving system as claimed in claim 1 , wherein the driving force causes a pull force to be generated in a direction towards a rotational pivot point to maintain rotational motion of the at least a portion of the driving motor body.
14. The driving system as claimed in claim 13 , wherein the pull force is directed primarily in a direction of the machine base.
15. The driving system as claimed in claim 1 , wherein the object is a bond head of a wire bonder.