DE202010007789U1 - Farbenrührmaschine - Google Patents

Abstract

A paint mixing machine (1) having a shelf for accommodating paint pots, said stirring machine having stirring means (5) and driving means (6, 7, 8, 9, 14) for driving said stirring means (5), said driving means being a motor (6), the drive means including a speed controller (20) capable of controlling a soft start of the motor (6), characterized in that the speed controller (20) comprises an electronics card (21) and a box (22), the Electronic card (21) contains power components and a microcontroller, wherein the electronic card (21) in the box (22) is attached.

Description

The The present invention relates to a paint mixing machine.

The For example, in the field of repair of vehicle bodies known paint stirrers generally have shelves, Stirrers and drive means on which the stirring means can set in rotation. Paint pots are on arranged on the shelves, and the stirring devices are used in the paint pots. The stirring devices generally have a cap of the can and one in this lid guided agitator on. The drive devices generally have a motor and transmission elements, which connect the engine with the stirring devices.

These Mixers have the disadvantage that the engine is powerful must be enough to start the stirring process in the color to allow, which is solidified or whose denser constituents themselves have dropped off at the bottom, with this performance in the following Stirring method is not fully used. In addition, the launch exercises a great force on the transmission elements from what they damage can.

The publication EP 1 488 847 describes a paint stirrer in which each drive head of a shelf has its own single micro motorization. This can reduce the number of transmission elements.

The transmission elements but are still heavily used during the start.

The The present invention aims to provide a paint stirring machine indicate at least some of the mentioned disadvantages avoids the use of a less powerful engine allowed, which on the transmission elements at the start limited force applied, and security for the user increases.

To For this purpose, the invention has a paint stirrer the subject matter, the stirring devices and drive devices has to drive the agitators, wherein the Drive devices include a motor, characterized that the drive means include a speed controller, the can control a soft start of the engine.

Preferably the motor is a three-phase asynchronous motor.

advantageously, the speed controller has an electronics card and a box, the electronic board having power components and a microcontroller contains, with the electronics card attached in the box is.

Preferably The box is made of aluminum and has slats that dissipate heat enable.

According to one Embodiment of the invention of the type in which at least a part of the elements, such as rotor and stator, the components of the engine of the machine, inside a generally metallic housing are housed, the speed controller is integrated in the engine, the box forming a lid resting on the housing of the engine is placed.

According to one Another embodiment of the invention is the speed controller mounted on the housing of the engine, the box of the Regulator is attached to the housing of the engine.

advantageously, The speed controller has control devices that have a first Push-button switch that allows the engine to be switched on, a second pushbutton switch that turns off the motor allows, and a diode included, a visual inspection the state of the stirring machine allows.

Preferably is the speed controller with a single-phase source of electricity connected.

advantageously, The drive devices contain at least one coupling component and a drive belt, wherein the coupling member has an opening intended to be the motor shaft or a fixed with the shaft connected to the motor shaft, wherein the coupling member a toothed groove, which is intended with a drive belt co.

The The invention will be better understood and its further objects, details, Features and benefits will become clearer from the following detailed explanatory description of several embodiments the invention, as purely illustrative and not serve as limiting examples and refer to the enclosed refer to schematic drawings. Show it:

1 a simplified schematic view of a paint mixing machine according to an embodiment of the invention in partial section from the front;

2 a simplified schematic view of the paint mixing machine of 1 from underneath;

3 a simplified schematic view of a speed controller of the paint mixing machine of the 1 in perspective;

4 a circuit diagram illustrating the steps of the control method of the speed;

5 a simplified schematic view in perspective showing the engine and the speed controller of the paint mixer 1 shows, wherein the speed controller is attached to the housing of the engine; and

6 a view similar to 5 showing a second embodiment in which the speed controller is integrated in the housing of the motor.

With reference to 1 you see a paint mixer 1 ,

The stirring machine 1 has shelves 2a and 2 B on. The number of shelves is not meant to be limiting. Paint pots (not shown) can be on the shelf 2 B to be ordered. The shelf 2a forms a shelf, the drive heads 4 can take, which are rotatably mounted.

The stirring machine 1 has stirring devices 5 on, which contain wings. The stirring devices 5 are each on the drive heads 4 mounted, wherein the wing is inserted into a paint pot, which under the corresponding drive head 4 is arranged.

The stirring machine 1 has drive devices that a motor 6 and transmission elements that contain the motor 6 with the drive heads 4 connect.

Preferably, the engine is 6 a three-phase asynchronous motor with a maximum power of 750 W. Such a motor has the advantage of being able to be used on any type of agitator. In addition, a three-phase motor is less noisy than a single-phase motor.

With reference to the 1 and 2 the transmission elements contain a drive belt 7 , the motor shaft 9 with a drive shaft 14 connects according to a substantially vertical axis along the agitator 1 extends. The drive belt 7 can the drive shaft 14 set in rotation.

The transmission elements contain a drive belt 8th on the shelf 2a is arranged. The belt 8th is from the drive shaft 14 drives and drives the drive heads 4 in a conventional manner.

With reference to the 3 to 6 indicates the stirring machine 1 a speed controller 20 on, the speed of the engine 6 can control.

The regulator 20 has an electronics card 21 , a box 22 and control devices 23 on. The regulator 20 is over a cable 24 connected to a single-phase electricity source (not shown). The use of the regulator 20 makes it possible to control a three-phase asynchronous motor from a single-phase network, which reduces the cost of the mixer 1 reduced, because a three-phase motor is about 20% cheaper than a single-phase motor.

The electronic card 21 has power components and a microcontroller to control the power components. The electronic card 21 is in the box 22 attached.

The box 22 is made of aluminum and has slats 29 on, which ensure the heat dissipation. The box 22 forms a protective cover in the event of an explosive atmosphere (shell 'd').

According to the in 6 illustrated embodiment is the controller 20 in the housing of the engine 6 integrated. This motor housing, inside which at least the stator and the rotor are housed, is generally in the form of a body having a shell of generally cylindrical appearance, which housing is preferably made of metal. The box 22 the controller has an open page 22a and forms a lid on the housing of generally cylindrical shape of the motor 6 is placed, in particular at the open end of the housing to close the housing formed by the shell. The attachment of the box 22 on the housing of the engine 6 takes place for example by means of screws. The integration of the controller 20 in the engine 6 makes it possible in particular to reduce the EMC problems and to make the system usable in explosive atmospheres.

One notes that the box 22 when he hits the case of the engine 6 is attached, has no opening, which in particular allows the electronic board 21 to protect against water splashes.

According to a second embodiment, in 5 is shown, is the controller 20 on the housing of the engine 6 mounted without going into the housing of the engine 6 to be integrated. In this embodiment, the box is 22 closed and has fastening devices to its attachment to the housing of the engine 6 to enable.

The control devices 23 , which are the same in the two embodiments, include an "on" push-button switch 26 that's turning on the engine 6 allows an "off" pushbutton switch 27 that turns off the engine 6 allows, and a two-color diode (not visible), which provides a visual check of the state of the mixer 1 allowed. For example, during operation of the mixer, the diode may 1 flash green, in case of motor overload 6 glow red, and after pressing a button 26 or 27 green light up. In particular, the diode allows visual inspection of the launch, allowing a user to intervene in a timely manner when the agitator 1 was turned on accidentally.

The control devices 23 are over a cable 28 with the electronics card 21 connected. It is noted that the control devices 23 have little ingredients, which makes it possible, not in the box 22 limit integrated components as much as possible. The control devices act on the control circuit of the electronic board 21 , the low required power allows protection in case of explosive atmosphere (intrinsic safety («i»)

Now the operation of the stirring machine 1 described.

When a user clicks the "on" button 26 the control devices 23 presses, the controller receives 20 Electricity from the single-phase source with which it is connected, and performs a speed control process, which contains three steps, schematically in 4 are shown.

A first step 40 consists of rectifying the AC voltage supplied by the power source (200-240 V, 50/60 Hz) by means of a rectifier to obtain a DC voltage.

A second step 41 consists in a smoothing circuit for performing a capacitive filtering.

A third step 42 consists of reassembling three sinusoids phase-shifted by 120 ° by PWM (Pulse Width Modulation) control using an inverter.

The obtained three-phase signal feeds the motor 6 ,

The regulator 20 thus performs a voltage conversion using the inverter principle (DC / AC voltage) to the speed of the motor 6 to control.

The power of the engine 6 has the effect that the motor shaft 9 with one by the regulator 20 supplied three-phase signal specified speed is set in rotation. Such is the rotational speed of the motor 6 completely independent of the mains frequency, which allows the speed of the stirring devices 5 to dominate.

The motor shaft 9 puts the drive heads 4 So the stirring devices 5 , via the drive shaft 14 in rotation.

Consequently, the wings of the stirring devices 5 in the corresponding color pots a rotation about its axis, which has the effect of mixing the color.

The soft start of the engine 6 allows a gentle release of the paint, which improves the start of stirring the high viscosity paint. The soft start of the engine 6 also makes it possible to save the transmission elements by being less stressed. Due to the soft start, the mechanical elements of the mixer can be simplified as the mechanical stresses are less severe. Another advantage of a soft start is to allow the omission of the reduction and transmission ratios, since in this case the rotational speed of the motor can be adapted directly to the stirring speed.

On the other hand, the soft start increases the safety for the user, since a user in the event of an accidental start has the time to respond, for example, his hands from the mixer 1 takes.

Even though the invention in conjunction with several particular embodiments has been described, it is obvious that they are not on it is limited, and that they are all to the described Facilities equivalent techniques as well as their combinations contains, as far as they are within the scope of the invention.

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• EP 1488847 [0004]

Claims (8)

Paint stirrer ( 1 ), which has a shelf that can accommodate color pots, wherein the agitator agitators ( 5 ) and drive devices ( 6 . 7 . 8th . 9 . 14 ) to the agitators ( 5 ), the drive means being an engine ( 6 ), wherein the drive means a speed controller ( 20 ), which makes a soft start of the engine ( 6 ), characterized in that the speed controller ( 20 ) an electronic card ( 21 ) and a box ( 22 ), wherein the electronic board ( 21 ) Contains power components and a microcontroller, wherein the electronic board ( 21 ) in the box ( 22 ) is attached. Agitator according to claim 1, characterized in that the engine ( 6 ) is a three-phase asynchronous motor. Mixer according to claim 1, characterized in that the speed regulator ( 20 ) is connected to a single-phase source of electricity. Mixer according to one of claims 1 to 3, characterized in that the box ( 22 ) is made of aluminum and lamellas ( 29 ), which allow heat dissipation. Agitating machine according to one of claims 1 to 4, of the type in which at least a part of the elements, such as rotor and stator, the components of the engine ( 6 ), are housed inside a metallic housing, characterized in that the speed controller ( 20 ) in the engine ( 6 ), the box ( 22 ) forms a cover, which on the housing of the engine ( 6 ) is placed. Mixer according to claim 1, characterized in that the speed regulator ( 20 ) on the housing of the engine ( 6 ), the box ( 22 ) on the housing of the engine ( 6 ) is attached. Mixer according to one of claims 1 to 6, characterized in that the speed controller ( 20 ) Control devices ( 23 ) having a first push-button switch ( 26 ), which turns on the engine ( 6 ) allows a second push-button switch ( 27 ), which turns off the engine ( 6 ) and a diode which provides a visual check of the condition of the mixer ( 1 ). Mixer according to claim 7, characterized in that the control devices ( 23 ) via a cable ( 28 ) with the electronic board ( 21 ) are connected.