US 12,704,129 B2 · Fan assembly

Abstract

The present application provides a fan assembly, this fan assembly is characterized by: a motor and an impeller, the motor having a motor body and a motor shaft extending from the motor body, a distal end of the motor shaft having a first positioning mark with a certain spacing from 5 a central axis of the motor shaft, the distal end of the motor shaft having an end surface, the first positioning mark being at least partially visible on the end surface, the impeller having an impeller center bore, and a second positioning mark being provided on the impeller, where when the motor shaft is inserted into the impeller center bore, and the central axis of the motor 10 shaft, the second positioning marker and the first positioning marker are on a same diameter of the fan assembly, the impeller is mounted in place in a radial direction relative to the motor so that the fan assembly reaches dynamic balance during operation. The impeller and the motor in the present application are detachable.

Claims18

Dependent claims

A fan assembly, comprising:

a motor having a motor body and a motor shaft extending from the motor body, a distal end of the motor shaft having a first positioning marker with a certain spacing from a central axis of the motor shaft, the distal end of the motor shaft having an end surface, the first positioning marker being at least partially visible on the end surface;
and
an impeller having an impeller center bore, the impeller provided with a second positioning mark thereon;
wherein when the motor shaft is inserted into the impeller center bore, and the central axis of the motor shaft, the second positioning marker and the first positioning marker are on a same diameter of the fan assembly, the impeller is mounted in place in a radial direction relative to the motor so that the fan assembly reaches dynamic balance during operation, and
wherein a position of the impeller is adjustable in a radial direction relative to the motor and relative to the motor shaft.

2 more elements

A fan assembly, comprising:

a motor having a motor body and a motor shaft extending from the motor body, a distal end of the motor shaft having a first positioning marker with a certain spacing from a central axis of the motor shaft, the distal end of the motor shaft having an end surface, the first positioning marker being at least partially visible on the end surface;
an impeller having an impeller center bore, the impeller provided with a second positioning mark thereon;
wherein when the motor shaft is inserted into the impeller center bore, and the central axis of the motor shaft, the second positioning marker and the first positioning marker are on a same diameter of the fan assembly, the impeller is mounted in place in a radial direction relative to the motor so that the fan assembly reaches dynamic balance during operation;
and
a fastener assembly comprising a positioning gasket and a fastening bolt, wherein the positioning gasket comprises a gasket hole and a joint facing the impeller, the gasket hole of the positioning gasket is aligned with the impeller center bore, the joint of the positioning gasket abuts against the motor shaft, the positioning gasket is clamped between the mounting portion of the impeller and a head of the fastening bolt, and the fastening bolt passes through the gasket hole of the positioning gasket to securely connect to the motor shaft, so as to securely connect the impeller and the motor shaft;
wherein the positioning gasket has a stop opening that engages with a positioning convex portion to limit rotation of the positioning gasket and the motor shaft connected to the positioning gasket relative to the impeller.

3 more elements

A reflow oven, comprising:

a furnace housing in which a furnace is formed;
a fan assembly, comprising:
a motor having a motor body and a motor shaft extending from the motor body, a distal end of the motor shaft having a first positioning marker with a certain spacing from a central axis of the motor shaft, the distal end of the motor shaft having an end surface, the first positioning marker being at least partially visible on the end surface;
and
an impeller having an impeller center bore, the impeller provided with a second positioning mark thereon, wherein when the motor shaft is inserted into the impeller center bore, and the central axis of the motor shaft, the second positioning marker and the first positioning marker are on a same diameter of the fan assembly, the impeller is mounted in place in a radial direction relative to the motor so that the fan assembly reaches dynamic balance during operation, wherein the fan assembly is disposed on the furnace housing, the impeller of the fan assembly being located inside the furnace of the reflow oven, and the motor body being located outside the furnace of the reflow oven;
a fastener assembly comprising a positioning gasket and a fastening bolt, wherein the positioning gasket comprises a gasket hole and a joint facing the impeller, the gasket hole of the positioning gasket is aligned with the impeller center bore, the joint of the positioning gasket abuts against the motor shaft, the positioning gasket is clamped between the mounting portion of the impeller and a head of the fastening bolt, and the fastening bolt passes through the gasket hole of the positioning gasket to securely connect to the motor shaft, so as to securely connect the impeller and the motor shaft;
and
a sealing device comprising a graphite gasket, the sealing device being sleeved on the motor shaft and disposed between the impeller and the motor body to form sealing between the impeller and the motor body;
wherein the impeller is detachably connected to the motor so that the graphite gasket is replaceable, and the first positioning mark and the second positioning mark enable the impeller to be mounted in place in the radial direction relative to the motor when the impeller is remounted on the motor shaft, and
wherein the positioning gasket has a stop opening that engages with the positioning convex portion to limit rotation of the positioning gasket and the motor shaft connected to the positioning gasket relative to the impeller.

7 more elements

Dependencies are inferred from the claim text.

Fan assembly

Life of this patent

Fan assembly

Life of this patent

Abstract

Claims18