CN216361067U

CN216361067U - Intermittent rotating mechanism

Info

Publication number: CN216361067U
Application number: CN202122019787.4U
Authority: CN
Inventors: 蔡立飞
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-08-26
Filing date: 2021-08-26
Publication date: 2022-04-22
Anticipated expiration: 2031-08-26

Abstract

An intermittent rotating mechanism comprises a synchronous motor, an eccentric deflector rod, a spline wheel, a spline shaft sleeve and a bearing, wherein the synchronous motor is arranged on a fixing plate of an electric fan and drives the eccentric deflector rod to rotate; the key groove is divided into a straight groove, an arc-shaped groove and a short groove according to the shape and length; the shifting rod rotates under the driving of the synchronous motor, and when a shifting wheel of the eccentric shifting rod enters a straight groove of the spline wheel, the spline wheel is driven to rotate; when the thumb wheel enters the arc-shaped wire groove, the thumb wheel of the eccentric thumb wheel moves along the arc-shaped wire groove, and the spline wheel does not rotate. The oscillating structure can increase a plurality of pauses at the middle position in the oscillating process of the electric fan, prolong the air supply time at the middle part, improve the air supply efficiency, meet the air supply requirement of a user, and the oscillating structure can also be suitable for other rotating electric appliances with pause requirements.

Description

Intermittent rotating mechanism

Technical Field

The utility model relates to a pure mechanical principle head swinging device used for electric products, in particular to an intermittent head swinging mechanism used for products such as electric fans, electric heating fans and the like or an intermittent pause type rotating mechanism used for products such as lucky fans, rotary induction cookers, electric grilles and the like.

Background

Head slewing mechanism and swing mechanism on the electrical product have been a very mature modularization product structure, have generally two kinds of structures to realize the swing on products such as domestic electric fan, electric heat fan:

the first one is that a worm on a rotor shaft is meshed with a matched turbine, the turbine is provided with an eccentric shaft, and the eccentric shaft drives a connecting rod to move back and forth to drive a fan head to swing left and right;

the second is to swing the fan by a synchronous motor (with a speed reducer), the rotation direction of the synchronous motor is random, the rotation direction can be automatically changed after the fan is subjected to resistance, and the fan can be prevented from rotating when the fan swings to a set position, so that the reciprocating swing phenomenon is formed.

The swinging head of the electric fan usually rotates at a constant angular speed, and when the electric fan rotates to the limit positions at the two sides, the electric fan slightly stops rotating forwards. This is also an effect brought about by the above-described structure. Therefore, the air supply time at the extreme positions of the swing head of the fan is usually slightly longer than the air supply time at the front, and a general user is usually near the front of the fan, so that the actually obtained air supply time is less than that at the two sides of the fan.

How to increase the air supply time of the middle part in the oscillating process of the fan on the basis of not increasing the circuit control is a long-standing unsolved problem in the field of household appliances.

Similarly, in other electronic products, such as a good luck fan, an electric grill and an induction cooker, an intermittent pause rotating mechanism is also used, so that intermittent pause can be realized on the basis of circular motion, and the use effect of the product can be improved.

Disclosure of Invention

The technical problem to be solved by the utility model is as follows: to provide a head swing mechanism capable of prolonging the air blowing time in the vicinity of the front of a fan, which is applied to a head swing mechanism capable of intermittently stopping at the time of head swing and having a plurality of automatic stopping angles.

The technical scheme adopted by the utility model for solving the problems is as follows: the utility model provides an intermittent type formula slewing mechanism, uses on electrical equipment such as electric fan, room heater, and it sets up on the fixed plate that links to each other with electrical apparatus shell, comprises synchronous machine, eccentric driving lever, spline wheel, spline shaft sleeve, bearing, its characterized in that: the swing head main shaft of the electric appliance is provided with a spline wheel, the synchronous motor is arranged on a fixing plate of the electric fan and drives the eccentric shifting rod to rotate, the tail end of the eccentric shifting rod is provided with a shifting wheel, the shifting wheel extends into a key groove of the spline wheel, the key groove is radially and equally divided into a star-shaped structure by the center of the spline wheel, and adjacent straight grooves are sequentially connected through arc-shaped wire grooves; the key groove is divided into a straight groove and an arc-shaped groove according to the shape; the shifting rod rotates under the driving of the synchronous motor, and when a shifting wheel of the eccentric shifting rod enters a straight groove of the spline wheel, the spline wheel is driven to rotate; when the thumb wheel enters the arc-shaped wire groove, the thumb wheel of the eccentric thumb wheel moves along the arc-shaped wire groove, and the spline wheel does not rotate; the spline shaft sleeve is fixedly connected with the base shell.

One or two short grooves are arranged on the spline wheel, and the length of each short groove is smaller than that of the common straight groove.

The short groove of the spline wheel is formed by inserting a blocking block into a straight groove and shortening the length of the key groove.

And the inner side of the spline wheel is provided with a mounting seat matched with the spline shaft sleeve and the bearing.

Compared with the prior art, the utility model has the advantages that: the intermittent rotation mechanism is divided into a plurality of stay directions in the process of making a circle, the direction of the fan is kept for a period of time in the stay directions, and then the intermittent rotation mechanism continues to rotate towards the next direction. The intermittent pause air supply effect can be formed.

The length of ordinary straight flute for eccentric driving lever can normally rotate a week, and the thumb wheel promotes one side of straight flute, drives the straight flute and rotates, and then makes the spline wheel drive the yaw main shaft and do intermittent type formula swing, reaches the design effect.

The synchronous motor can automatically rotate reversely when meeting resistance, and an automatic head swinging function can be added to the intermittent rotating mechanism through a preset short groove. When the shifting wheel reaches the direction of the short groove, the eccentric shifting rod driven by the synchronous motor rotates, the shifting wheel is blocked by the end part of the short groove, and the synchronous motor rotates after being blocked, so that automatic returning is realized. Therefore, when the thumb wheel enters the tail end of the short groove, the thumb wheel can rotate reversely, and the requirement of swinging left and right for air supply is met.

The short groove can be formed by inserting the blocking block into the straight groove, so that the spline wheel can be manufactured uniformly according to the standard, the blocking block is inserted into the corresponding straight groove according to the requirement of the actual air supply range, the swing angle of the fan is set, and the adjustable effect is achieved.

Drawings

FIG. 1: the utility model relates to a structure diagram of an electric fan.

FIG. 2: an enlarged view of the spline wheel and eccentric toggle.

FIG. 3: the first state of the schematic diagram (the thumb wheel enters the straight groove to start swinging, and the thumb wheel enters the deep part of the straight groove).

FIG. 4: and the second principle diagram state (the thumb wheel reaches the top end of the straight groove).

FIG. 5: and a third principle diagram state (the thumb wheel is withdrawn from the straight groove and continues to swing).

FIG. 6: and the state of the schematic diagram is four (the dial wheel enters the arc-shaped groove, and the intermittent rotation stops).

FIG. 7: and a fifth principle diagram state (the dial wheel enters the tail end of the short slot, and the synchronous motor rotates after being blocked).

In fig. 3 to 7, in order to clearly show the relative relationship between the key grooves of the thumb wheel and the spline wheel, only the positions of the rotating shaft and the thumb wheel of the eccentric thumb lever are reserved, and the thumb lever part of the eccentric thumb lever is omitted.

In the figure, 1 is a bottom plate, 2 is a synchronous motor, 3 is a fixed plate, 4 is an eccentric deflector rod, 5 is a spline wheel, 6 is a spline shaft sleeve, 7 is a bearing, 8 is a base shell, 9 is an electric fan head, and 10 is a controller.

41 is the connecting part of the rotating shaft of the eccentric deflector rod, 42 is the deflector rod, 43 is the deflector wheel at the end part of the deflector rod, 51 is a straight groove, 52 is an arc-shaped wire groove, 53 is a short groove, 54 is a mounting seat, and 55 is a blocking block; and 91 is a head swinging main shaft.

Detailed Description

The utility model relates to an intermittent rotating mechanism applied to an electric appliance product. The embodiments of the present invention will be further described with reference to the drawings, in which the electric appliance in the embodiments is exemplified by an electric fan, but the intermittent rotation mechanism of the present invention is applicable to all electric appliances with rotation function, and is not limited to an electric fan.

As shown in fig. 1, the electric fan or the heater is a common household type, and is composed of a base, a swing spindle and a fan head by default, wherein the swing spindle has a length selectable according to actual requirements.

The base is composed of a base shell and a bottom plate, and the fixing plate is fixedly connected with the base shell. The intermittent rotating mechanism consists of a synchronous motor, an eccentric deflector rod, a spline wheel, a spline shaft sleeve and a bearing. Synchronous machine installs on the fixed plate, and the pivot junction of eccentric driving lever links to each other with the synchronous machine output shaft, and the tip of eccentric driving lever is provided with the thumb wheel, and the motion in the keyway of thumb wheel embedding spline wheel drives the corresponding rotation of spline wheel along with the thumb wheel rotates.

The center of the spline wheel is provided with a bearing mounting seat, and the spline shaft sleeve is fixedly connected with the base shell, so that the swinging head main shaft is stably supported to rotate. The spline wheel is provided with key slots which are arranged in a star-shaped structure in a radial manner at equal intervals in the center of the spline wheel, and adjacent straight slots are sequentially connected through arc-shaped slots; the key slot is divided into a straight slot, an arc slot and a short slot according to the shape and length. The length of the straight groove exceeds the maximum length required by one circle of rotation of the shifting wheel, namely the radius of the tail end of the straight groove is larger than the distance between the shifting wheel and the center of the spline wheel when the eccentric shifting rod is located at the lowest position.

The length of the short groove is shorter than that of the straight groove, the short groove can be directly processed into the short groove in an integrated mode, and the length of the short groove can be shortened by inserting the blocking block into the common straight groove. The tail end of the short groove blocks the shifting wheel to rotate, the eccentric shifting rod cannot rotate for a circle, and the synchronous motor automatically reverses after being subjected to resistance, so that automatic returning is realized. Therefore, when the thumb wheel enters the tail end of the short groove, the thumb wheel can rotate reversely, the requirement of air supply by swinging left and right is met, and the function of automatic head swinging is realized.

Fig. 3 to 7 are schematic diagrams of the intermittent rotation mechanism in various working states:

fig. 3 shows that as the synchronous motor rotates, the shifting wheel at the end of the eccentric shifting lever enters the straight slot, rotates along the side wall of the straight slot and pushes the spline wheel to rotate, so as to drive the fan head of the fan to deflect the air supply direction.

Fig. 4 shows that when the thumb wheel enters the farthest end of the straight groove, the thumb wheel is still pushed to rotate the spline wheel, and the fan head of the fan is driven to rotate.

Fig. 5 shows that the thumb wheel retreats from the farthest end of the straight groove and still pushes the spline wheel to rotate, so that the fan head of the fan is driven to rotate.

Fig. 6 shows that the thumb wheel enters the arc-shaped slot, at the moment, the eccentric thumb wheel idles, the thumb wheel moves along the track of the arc-shaped slot, the spline wheel is not pushed, the fan head of the fan stops intermittently, and the air is continuously supplied in one direction stably.

The working states of fig. 3 to 6 are sequentially and circularly performed, so that the fan is stopped for a moment after facing a certain angle, and then the air supply is continued by shaking the head.

Fig. 7 shows that the thumb wheel enters the short groove, and the length of the short groove does not satisfy the length of the thumb wheel rotating for one circle, so that the thumb wheel can be clamped at the bottom end of the short groove to cause resistance to the synchronous motor, and the synchronous motor automatically reverses after receiving the resistance to realize automatic return. And finishing the swinging action of the fan.

The utility model relates to an attempted improvement of the existing electric fans, electric heating fans and other household appliances, which can increase a plurality of stop points in the air supply range and supply air for a moment at the stop points on the basis of the left and right swinging of the common fan. The fan is of a pure mechanical structure, does not need circuit board support, does not need to provide more requirements for the existing synchronous motor and a control circuit board, and is a technical breakthrough in the field of fans. Through the design to straight flute quantity, straight flute angle, can accurate design intermittent type formula yaw stop direction and yaw air supply angle, make its air supply demand that can be better satisfy the user, through predetermineeing the position and the quantity of short groove, make its air supply carry out intermittent type formula yaw air supply between the angle scope of two short grooves.

The intermittent rotating mechanism of the utility model can be suitable for a fan, a rotary induction cooker, an electric grill and other electric products which are designed to rotate circumferentially under the condition of not arranging short grooves, and can generate a plurality of preset pauses in the circumferential process when the main shaft of the intermittent rotating mechanism does circular motion, wherein the pause number is the same as that of straight grooves, and the pause time is related to the motion time of the thumb wheel in the arc-shaped groove. Therefore, intermittent rotation with better reliability is realized completely through a mechanical design mode.

Claims

1. The utility model provides an intermittent type formula slewing mechanism, uses on equipment such as electric fan, electric heat fan for the directional angle deflection that takes place of electric fan head, it sets up on the fixed plate that links to each other with the electric fan shell, comprises synchronous machine, eccentric driving lever, spline wheel, spline axle sleeve, bearing, its characterized in that: the spline wheel is arranged on the swing head main shaft of the electric fan or the electric heating fan, the synchronous motor is arranged on a fixing plate of the electric fan and drives the eccentric shifting rod to rotate, the shifting wheel is arranged at the tail end of the eccentric shifting rod and extends into the key groove of the spline wheel, the key groove is radially and equally arranged into a star-shaped structure at the center of the spline wheel, and adjacent straight grooves are sequentially connected through arc-shaped wire grooves; the key groove is divided into a straight groove and an arc-shaped groove according to the shape; the shifting rod rotates under the driving of the synchronous motor, and when a shifting wheel of the eccentric shifting rod enters a straight groove of the spline wheel, the spline wheel is driven to rotate; when the thumb wheel enters the arc-shaped wire groove, the thumb wheel of the eccentric thumb wheel moves along the arc-shaped wire groove, and the spline wheel does not rotate.

2. An intermittent rotary mechanism as recited in claim 1, wherein: one or two short grooves are arranged on the spline wheel, and the length of each short groove is smaller than that of the common straight groove.

3. An intermittent rotary mechanism as recited in claim 2, wherein: the short groove of the spline wheel is formed by inserting a blocking block into a straight groove and shortening the length of the key groove.

4. An intermittent rotary mechanism as recited in claim 1, wherein: and the inner side of the spline wheel is provided with a mounting seat matched with the spline shaft sleeve and the bearing.

5. An intermittent rotary mechanism as recited in claim 1, wherein: the spline shaft sleeve is fixedly connected with the base shell.