CN1158962A

CN1158962A - Microwave oven turntable driving apparatus

Info

Publication number: CN1158962A
Application number: CN96114267A
Authority: CN
Inventors: 姜亨周
Original assignee: LG Electronics Inc
Current assignee: LG Electronics Inc
Priority date: 1995-12-28
Filing date: 1996-12-17
Publication date: 1997-09-10
Also published as: GB9626458D0; KR0176798B1; GB2308795A; KR970047176A; GB2308795B; BR9606169A

Abstract

A micro-wave oven turntable driving device, includes driving member mounted on the top of a motor; A microwave oven turntable driving apparatus includes a driving member mounted on the top of a motor; a joggle member disposed adjacent to one side of the driving member and joggled with the driving member; a vertical move guide device disposed on the lower surface of the joggle member for making the joggle member move vertically while rotating; A shaft for transferring the joggle force of the vertically move joggle member; and a turnable base frame mounted on the top of the shaft. The apparatus can make the turnable move vertically while moves horizontally, thereby uniformly heat the food on the turntable.

Description

The drive unit of microwave oven turntable

The present invention relates to micro-wave oven, more particularly, relate to a kind of drive unit that when rotating rotating disk, can also move up and down the microwave oven turntable of rotating disk.

Fig. 1 is the structural representation of the drive unit of existing microwave oven turntable, lower surface at carriage 1 is provided with motor 2, motor 2 give the rotating disk pedestal 4 that is connected with the upper end of turning cylinder 3 with the transmission of torque of motor 2, and rotating disk just is placed on the pedestal 4 by being connected with turning cylinder 3.

The work and the shortcoming thereof of the drive unit of the microwave oven turntable of the prior art with above-mentioned structure are described below.

At first, when feeding electric current, during starter 2, motor drive shaft 3 rotates along with the torque of motor 2 generations, thereby therefore the rotating disk pedestal 4 that is positioned at axle 3 tops, drives the dial rotation that is placed on the rotating disk pedestal 4 also along with rotation.

When the rotating disk 5 of top food container rotated with corresponding speed along with the rotation of motor drive shaft 3, the high-frequency microwave energy that magnetron (not expressing among the figure) produces just acted on the food, makes the food heating.

Yet the bottom of food is compared with its top, can not heat equably, and this mainly is because 5 of rotating disks horizontally rotate motion.

Therefore, the object of the present invention is to provide a kind of drive unit that when rotating rotating disk, can also make the microwave oven turntable that rotating disk moves up and down.

For achieving the above object, the drive unit of this microwave oven turntable comprises: one is arranged on the drive member on motor top; One is arranged on the joggle piece near drive member one side, so that mesh with drive member; One is arranged on the guider that moves both vertically on this joggle piece lower surface, is used for making joggle piece vertically to move up and down when rotating; Axle, and a rotating disk pedestal that is installed in a top at the engagement force that is used for transmitting joggle piece along moving both vertically when guider moves up and down.

Describe embodiments of the invention with reference to the accompanying drawings in detail.In the accompanying drawing:

Fig. 1 is the structural representation of the tumbler of microwave oven turntable in the prior art;

Fig. 2 A is that the figure turntable is lifted to a certain position according to the cross-sectional view of the drive unit of microwave oven turntable of the present invention;

Fig. 2 B is the cross-sectional view according to microwave oven turntable drive unit of the present invention, and the figure turntable reduces gets back to the home position;

Fig. 3 A is a plane, and expression is according to the interior guider in the drive unit of microwave oven turntable of the present invention;

Fig. 3 B is the cutaway view along O-III line among Fig. 3 A;

Fig. 3 C is the cutaway view along O-III ' line among Fig. 3 A;

Fig. 4 A is the expanded view of A part among Fig. 3 A;

Fig. 4 B is the expanded view of B part among Fig. 3 A;

Fig. 5 is with the open cube display after part is partly separated with B among Fig. 3 A; And

Fig. 6 A and 6B are the schematic diagrames that the drive unit of foundation microwave oven turntable of the present invention moves both vertically.

Shown in Fig. 2 A and 2B, a motor 11 with certain velocity of rotation (rpm) operation has been installed on the lower surface of bottom bracket 10.Be provided with the driven wheel 20 that the motion with motor 11 moves at the motor drive shaft 12 that extends out from motor 11.

Driven wheel 20 has formation first gear ring 22 on the excircle of the plate-like ectosome 21 of gear, and the plate-like ectosome is connected with the motor drive shaft 12 that extends out from motor 11; And a pair of projection 23 that extends out from the upper surface of ectosome 21, this is parallel with motor drive shaft when the inactive state to projection, and is symmetrical in motor drive shaft.

Microswitch 30 is arranged on bottom bracket 10 near on the inner surfaces of ectosome 21, and when inactive state, with a pair of projection 23 on a line, like this,, just can make gear 20 time-outs that drive by motor owing to detect projection 23.

Be positioned at first gear ring 22 and second gear ring, 42 engagements that are positioned at outer guide gear 40 sides of the side of driven wheel 20.Outer guide gear 40 comprises: second gear ring 42 that forms on the excircle of cylindrical body 41; The interior direction recess 43 that in main body 41, forms along some internal diameters; And the first taper slide protrusion 44 that circular arc form height top is arranged that extends out from the excircle of direction recess 43.

The excircle length of the main body 41 of outer guide gear 40 is identical with the excircle length of the main body of driven wheel 20, makes that the rotation period of the rotation period of external gear 40 and driven wheel is proportional.

Guider 50 in one annular is set on certain part of the bottom of guide gear 40 and bottom bracket 10 outside, when being used for guide gear 40 rotations outside, it is moved up and down.The end of axle 60 inserts the center of outer guide gear, thereby, when guide gear 40 moves up and down along interior guider 50 outside, can give axle 60 with the transmission of torque of outer guide gear 40.

Insert in the plate-like support plate 70 lower end of axle 60, and form the second taper slide protrusion 71 along the periphery of support plate, and therefore, projection 71 one sides are along with axle 60 rotates, and a surface bearing interior guide 50.The upper end of axle 60 install one with outside the rotating disk pedestal 80 that is connected of guide gear 40, the motion path of rotating disk pedestal 80 is identical with the path of outer guide gear 40, at the upper surface of rotating disk pedestal 80 rotating disk 81 is installed.

On bracket 90, fix a bearing bracket 82, a bearing 83 is set towards the inboard of axle 60, be used for bolster 60 at bearing bracket 82 around axle 60 middle parts.

As shown in Figure 5, formation one is similar to sinusoidal first track 51 on interior guide 50, so first slide protrusion 44 of outer guide gear 40 just can contact with the outside of the upper surface of interior guide 50, and slides in the above; Below interior guide, also form similar sinusoidal second track 52, so second slide protrusion 71 of support plate 70 just can contact with interior guide 50, and along the slides within of the lower surface of inner orbit 50.

Work and effect according to the drive unit of microwave oven turntable of the present invention are described below.

At first, when feeding electric current, when motor 11 is rotated, the driven wheel 20 that is arranged on the motor drive shaft 12 of motor 11 just rotates, the rotation of intermeshing of outer guide gear 40 and driven wheel 20, so, insert in the outer guide gear 40, also rotate by the axle 60 that is installed in the bearing supporting on the bearing bracket 82 thereupon.

Shown in Fig. 6 A and 6B, at this moment, first slide protrusion 44 and second slide protrusion 71 are respectively along the path movement of the

respective rail

51,52 of interior guider 50, wherein, when the 0 ° position of first slide protrusion 44 on first track 51 on track 51 circumference begins when mobile, second slide protrusion 71 on the support plate 70 also begins to move along 0 ° of position of track 52 circumference, thereby, outer guide gear 40 is when horizontally rotating, and also generation moves up and down.

The rotating disk pedestal 80 that is installed in axle 60 upper ends also moves up and down when horizontally rotating with outer guide gear 40, and correspondingly, rotating disk 81 is also along moving with the identical motion path of rotating disk pedestal 80.

Therefore, rotating disk 81 horizontally rotate, and meanwhile move up and down, thereby no matter the food that is placed on the rotating disk is that has all heated equably top or bottom.

When food was heated to the anticipation degree, microswitch 30 detected and the projection 23 of driven wheel 20 position in line, has so just stopped the motion of driven wheel 20.At this moment, first slide protrusion 44 is positioned at 0 ° or 180 ° of first track 51 of guider 50 as shown in Fig. 6 A, second slide protrusion 71 of support plate 70 is then as shown in Fig. 6 B, be positioned at 0 ° or 180 ° of second track 52 of guider 50, thereby rotating disk 81 is moved up and down.

As mentioned above, the drive unit of foundation microwave oven turntable of the present invention can make rotating disk move both vertically, thereby the food on the rotating disk is heated equably when rotating disk is horizontally rotated, thereby obtains better effect.

Claims

1. the drive unit of a microwave oven turntable, it comprises:

One is arranged on the drive unit that motor top is used for transmitting the motor driving force;

One is arranged near the geared assembly that is used for drive unit one side with the drive unit engagement;

One is arranged on the guider that moves both vertically of above-mentioned geared assembly lower surface, is used for making geared assembly vertically to move up and down when rotating;

Insert in the above-mentioned geared assembly bottom, so as at geared assembly along the axle that transmits the engagement force of mesh component when the guider that moves both vertically moves up and down;

One is installed in the top of above-mentioned axle, the rotating disk pedestal that moves along the motion path of mesh component.

2. device as claimed in claim 1 is characterized in that, above-mentioned drive unit is a driven wheel, and this driven wheel is included in first gear ring that forms on the excircle of gear plate-like ectosome, and the plate-like ectosome of this gear ring is connected with the axle of motor; And a pair of projection that extends out from the upper surface of ectosome, in inactive state, this is symmetrical in axle in the horizontal direction to projection.

3. device as claimed in claim 1 is characterized in that, above-mentioned geared assembly is a guide gear, and it is included in second gear ring that forms on the excircle of gear columnar body, first gear ring engagement of this second gear ring and driven wheel; Direction recess along the formation of said gear main body one internal diameter; And extend out, and the first taper slide protrusion on the high top of an arc is arranged from above-mentioned direction recess excircle.

4. device as claimed in claim 1 is characterized in that, a discoid support plate is inserted in the lower end of above-mentioned axle, and forms the second taper slide protrusion along the periphery of support plate, thereby can rotate in the inner face of supports vertical linear motion guide device bottom.

5. device as claimed in claim 1, it is characterized in that, the above-mentioned guider that moves both vertically is a guider in the annular, it is included in first track of the sine curve shape that forms above of this guider, first slide protrusion of guide gear can be contacted with first track, and slide into the outside of the upper surface of interior guider along first track; And second track of the sine curve shape that on the lower surface of this guider, forms, second slide protrusion of support plate can be contacted with second track, and slide into the outside of the lower surface of interior guider along track.

6. device as claimed in claim 2 is characterized in that, near the ectosome place of drive unit one microswitch is set at the medial surface of bottom bracket, so that make drive unit out of service during by means of the projection that detects on the ectosome.

7. device as claimed in claim 3 is characterized in that, the outer circumference of the main body of above-mentioned guide gear equates with the outer circumference of driven wheel.