DE202016008927U1 - DC scarifier - Google Patents

Abstract

DC scarifier comprising:
- a main housing (10) for receiving a scarifier main body,
- a handle (20) which is connected to the main housing in such a way that the scarifier main body can move under the action of an external force,
- A wheel set (30) which comprises a rear wheel set and a front wheel set and is attached to the underside of the main housing, characterized in that
- the scarifier main body comprises a scarifying unit (40), a drive device (50) for driving the scarifying unit (40) and a drive control unit for controlling the operation of the scarifying unit (40),
- The drive device (50) comprises a battery assembly (51) and a DC motor electrically connected to the battery assembly (51), wherein in the main housing (10) a battery compartment (11) for the battery assembly (51) and a receiving space (12) for the DC motor are formed, in which battery compartment (11) a holder for fastening the battery assembly (51) is arranged.

Description

Field of invention

The present invention relates to garden tools, and more particularly to a direct current scarifier in the form of a small scarifier.

Technical background

With the rapid development of agriculture, mechanization of agricultural activities is gradually being realized. Scarifying is a fundamental work in arable farming. A suitable scarifier is set up to loosen up the earth, remove humus such as dead leaves from the surface of the earth and expose the plant cover to the sun for increased growth.

The conventional scarifiers have the following problems: (1) They are large in size and weight, and are not easy to operate. In particular, those machines that have been moved directly from the open field into a greenhouse can only be turned around or relocated with difficulty within the equipment and, moreover, cannot be operated in edge and corner areas. (2) Because of the low adaptability, a high soil water content (more than 15%) results in reduced scarifying performance and increased energy consumption. For these reasons, the conventional large scarifiers are only suitable for building large, flat areas without grain and are not suitable for hills, mountainous terrain, small plots with large differences in height, ground areas with grain or greenhouses.

Small scarifiers were developed on the basis of conventional scarifiers, are configured or constructed in a simplified manner and can be used for private gardens. The current scarifiers mainly consist of an electric motor, a reduction gear, a chassis, a scarifying knife and a depth adjustment unit, with an AC motor being used as the electric motor, which requires a power supply cable and is therefore unwieldy.

Disclosure of the invention

In order to overcome the disadvantages of the prior art, it is the object of the present invention to offer a direct current scarifier which, compared to conventional scarifiers, is characterized by smaller volume, simpler structure, higher flexibility and lower power consumption and is suitable for hills and mountainous terrain , small plots with large differences in height, land with grain and greenhouses.

• Ein Gleichstrom-Vertikutierer umfasst ein Hauptgehäuse zur Aufnahme eines Vertikutierer-Hauptkörpers, einen Handgriff, welcher derart an dem Hauptgehäuse angeschlossen ist, dass sich der Vertikutierer-Hauptkörper unter Einwirkung einer äußeren Kraft bewegen kann, und einen Radsatz, der einen hinteren Radsatz und einen vorderen Radsatz umfasst und an der Unterseite des Hauptgehäuses angebracht ist, wobei der Vertikutierer-Hauptkörper eine Vertikutiereinheit, eine Antriebseinrichtung zum Antrieb der Vertikutiereinheit, eine Antriebssteuereinheit zum Steuern des Betriebs der Vertikutiereinheit umfasst.

To solve this problem, the invention proposes the following configurations:

• A direct current scarifier comprises a main housing for receiving a scarifier main body, a handle which is connected to the main housing in such a way that the scarifier main body can move under the action of an external force, and a wheel set, which has a rear wheel set and a front Includes wheel set and is attached to the underside of the main housing, wherein the scarifier main body comprises a scarifying unit, a drive device for driving the scarifying unit, a drive control unit for controlling the operation of the scarifying unit.

The drive device comprises a battery assembly and a DC motor electrically connected to the battery assembly, with a battery compartment for the battery assembly and a receiving space for the DC motor being formed in the main housing, in which battery compartment a holder is arranged which is used to fasten the battery assembly.

It is further provided that a brushless direct current motor is used as the direct current motor which comprises a motor shaft, a stator placed on the motor shaft, a plastic coil carrier, a two-part plastic coil carrier cooperating with the stator and a rotor arrangement.

It is further provided that the rotor arrangement comprises a pull housing located on the outer circumference of the stator, a cage arranged inside the pull housing and a permanent magnet attached to the inner wall of the pull housing, which permanent magnet comprises a south pole electrical steel sheet and a north pole electrical steel sheet, with the Pull housing extending in the axial direction fastening grooves for fastening the south pole electrical steel sheet and the north pole electrical steel sheet are formed, wherein the south pole electrical sheet and the north pole electrical sheet are attached to the cage offset from one another by means of the fastening grooves.

It is further provided that the two-part plastic coil carrier comprises a first plastic coil carrier and a second plastic coil carrier, a ventilation channel being formed between the first plastic coil carrier and the second plastic coil carrier.

It is further provided that the rotor arrangement further comprises fan blades located at one end of the motor shaft and a fastening plate located at the other end of the motor shaft.

It is further provided that the scarifying unit comprises a knife shaft and a set of scarifying knives or steel claws fastened to the knife shaft, with a holder serving to fasten the knife shaft being arranged on the underside of the main housing and the knife shaft being connected to the motor shaft of the DC motor via a belt wheel set, which Belt wheel set comprises a drive wheel, a driven wheel and a belt connected to the drive wheel and the driven wheel, the drive wheel being attached to the motor shaft and the driven wheel being attached to the cutter shaft.

It is further provided that the drive control unit comprises a control device for controlling the output power of the direct current motor and a control switch used to switch the control device on and off, the control device being electrically connected to both the control switch and the electric motor.

It is further provided that the control switch is arranged on the handle and comprises a switch button and a switch actuating lever, which are electrically connected to one another.

It is also provided that the battery assembly is a lithium battery pack.

It is further provided that the direct current scarifier according to the invention further comprises a waste funnel which is attached to the rear end of the main housing behind the scarifier unit.

Figure list

• 1 eine Außenansicht eines erfindungsgemäßen Gleichstrom-Vertikutierers,
• 2 den schematischen Aufbau eines erfindungsgemäßen Gleichstrom-Vertikutierers,
• 3 den schematischen Aufbau eines erfindungsgemäßen bürstenlosen Gleichstrommotors,
• 4 den schematischen Aufbau einer Vertikutiereinheit eines erfindungsgemäßen Gleichstrom-Vertikutierers und
• 5 den schematischen Aufbau einer Variante der Vertikutiereinheit des erfindungsgemäßen Gleichstrom-Vertikutierers.

In the following, the invention is described in more detail on the basis of specific embodiments with reference to the accompanying drawings. Show it

• 1 an external view of a direct current scarifier according to the invention,
• 2 the schematic structure of a direct current scarifier according to the invention,
• 3 the schematic structure of a brushless DC motor according to the invention,
• 4th the schematic structure of a scarifying unit of a direct current scarifier according to the invention and
• 5 the schematic structure of a variant of the scarifying unit of the direct current scarifier according to the invention.

List of reference symbols

10

Main body

11

Battery compartment

111

chamber

112

cover

12

Recording room

20th

Handle

30th

Wheelset

40

Scarifying unit

41

Knife shaft

42

Scarifying knife set

43

Steel claw

50

Drive device

51

Battery assembly

52

Brushless DC motor

531

Motor shaft

5321

First plastic bobbin

5322

Second plastic bobbin

533

stator

534

Cage

535

Permanent magnet

536

Pull housing

537

Fan blade

538

Mounting plate

61

Control unit

62

Control switch

621

Switch button

622

Switch operating lever

70

Waste funnel

Concrete embodiments

• - ein Hauptgehäuse 10 zur Aufnahme eines Vertikutierer-Hauptkörpers, der eine Vertikutiereinheit 40, eine Antriebseinrichtung 50 zum Antrieb der Vertikutiereinheit 40, eine Antriebssteuereinheit zum Steuern des Betriebs der Vertikutiereinheit 40 umfasst,
• - einen Handgriff 20, welcher derart an dem Hauptgehäuse angeschlossen ist, dass sich der Vertikutierer-Hauptkörper unter Einwirkung einer äußeren Kraft bewegen kann,
• - einen Radsatz 30, der einen hinteren Radsatz und einen vorderen Radsatz umfasst und an der Unterseite des Hauptgehäuses 10 angebracht ist.

As in 1 and 2 comprises a direct current scarifier according to the invention

• - a main body 10 for receiving a scarifier main body, which is a scarifier unit 40 , a drive device 50 to drive the scarifying unit 40 , a drive control unit for controlling the operation of the scarifying unit 40 includes,
• - a handle 20th , which is connected to the main housing in such a way that the scarifier main body can move under the action of an external force,
• - a set of wheels 30th , which includes a rear wheel set and a front wheel set, and on the bottom of the main housing 10 is appropriate.

The drive device 50 includes a battery assembly 51 and a direct current motor, in the present exemplary embodiment a brushless direct current motor 52 , the battery assembly 51 with the brushless DC motor 52 is electrically connected. In the main case 10 are a battery compartment 11 for the battery assembly 51 and a recording room 12 for the brushless DC motor 52 educated. The battery compartment 11 includes a chamber 111 and a lid 112 , being in the chamber 111 one to attach the battery assembly 51 serving bracket (not shown) is arranged.

In a first embodiment according to 3 includes the brushless DC motor 52 in detail a motor shaft 531 , one on the motor shaft 531 attached stator 533 , a plastic coil carrier, one with the stator 533 cooperating two-part plastic coil carrier and a rotor assembly. Starting from the first embodiment, the rotor arrangement in a second embodiment of the invention comprises the outer circumference of the stator 533 surrounding pull housing 536 , one inside the pull housing 536 located and with the pull housing 536 cooperating cage 534 and one on the inner wall of the pull housing 536 attached permanent magnet 535 , the permanent magnet 535 includes a south pole electrical sheet and a north pole electrical sheet. On the inside wall of the pull housing 536 Fastening grooves extending in the axial direction are formed for fastening the south pole electrical steel sheet and the north pole electrical steel sheet, the south pole electrical steel sheet and the north pole electrical steel sheet being offset from one another by means of these fastening grooves on the pull-type housing 536 are attached. Due to the interaction of the cage and pulling housing 536 is a secure attachment of the south pole electrical steel sheet and the north pole electrical steel sheet to the inner wall of the pulling housing 536 possible. In the concrete version, the permanent magnet is 535 of course, not limited to electrical steel sheets, but can be carried out in any other way, provided that the same functions as with electrical steel sheets can be implemented.

Starting from the first and second exemplary embodiment, the two-part plastic coil carrier comprises a first plastic coil carrier in a third exemplary embodiment 5321 and a second plastic bobbin 5322 , with between the first plastic coil carrier 5321 and the second plastic bobbin 5322 a ventilation channel is formed. This ventilation channel can serve as a cooling channel in order to support the cooling of the windings and to extend the service life of the electric motor.

Proceeding from the first to the third exemplary embodiment, the rotor arrangement furthermore comprises fan blades located at one end of the motor shaft 537 and a mounting plate disposed at the other end of the motor shaft 538 .

In the first to the third exemplary embodiment, the scarifying unit comprises 40 in detail a knife shaft 41 and one on the knife shaft 41 attached scarifying knife set 42 , being at the bottom of the main body 10 one to attach the cutter block 41 serving bracket (not shown) is arranged. Here is the knife shaft 41 via a belt wheel set (not shown) with the motor shaft 531 of the brushless DC motor 52 connected, which belt wheel set comprises a drive wheel, a driven wheel and a belt connected to the drive wheel and the driven wheel, the drive wheel on the motor shaft and the driven wheel on the cutter shaft 41 is attached. In addition, the scarifying knife set of the scarifying unit can also be fitted with steel claws 43 (see. 5 ) or other structures that have the function of scarifying or allow ventilation of the soil surface.

In the first to third exemplary embodiments, the drive control unit comprises a control device 61 for controlling the output power of the DC motor and one for switching the control device on and off 61 serving control switch 62 , the control unit 61 both with the control switch 62 and is electrically connected to the DC motor. In the present exemplary embodiment, the control unit is 61 the brushless DC motor 52 assigned and electric with the brushless DC motor 52 connected. By controlling the output power of the electric motor depending on the respective work load, electricity saving can be achieved effectively.

In the first to the third exemplary embodiment, the control switch can be arranged on the handle, the control switch 62 a switch button 621 and a switch operating lever 622 which are electrically connected to each other.

In all exemplary embodiments of the invention, the battery assembly is preferably a lithium battery pack. It is understood, however, that the battery assembly is not limited to lithium battery packs, but can alternatively also be other types of batteries. A lithium ion battery is preferred here in favor of the volume and weight of the scarifier.

In addition, the direct current scarifier according to the invention comprises a waste funnel 70 that is at the rear of the main body 10 behind the scarifying unit 40 is attached. During scarification or ventilation of the floor area, withered leaves or similar waste, which cover the floor area and thereby block a draft through the floor area, can be conveyed through the scarifying unit into the waste funnel.

• Mit dem Handgriff kann der ganze Vertikutierer manuell bis zu einer zu vertikutierenden Stelle gebracht werden. Anschließend wird der Schalterknopf 621 der Steuereinheit betätigt, um einen Einschaltbefehl über den Schalterbetätigungshebel 622 an das Steuergerät 61 weiterzuleiten, wobei das Steuergerät 61 den Gleichstrommotor 52 so steuert, dass dieses von der Batteriebaugruppe 51 zur Drehung angetrieben wird. Daraufhin beginnt sich das an der Motorwelle 531 befestigte Antriebsrad des Zahnradsatzes zu drehen und nimmt dabei aufgrund des Ineinandergreifens von Antriebsrad und Abtriebsrad das Abtriebsrad mit, um die Messerwelle 41 und die Vertikutiermesser 42 oder die Stahlklauen 43 der Vertikutiereinheit 40 in Betrieb zu nehmen.

The functioning of the direct current scarifier according to the invention is as follows:

• With the handle, the entire scarifier can be brought manually to a point to be scarified. Then the switch button 621 operated by the control unit to issue a switch-on command via the switch operating lever 622 to the control unit 61 forward, the control unit 61 the DC motor 52 so that this controls from the battery assembly 51 is driven to rotate. This then begins on the motor shaft 531 To rotate the attached drive wheel of the gear set and takes due to the meshing of the drive and driven gear with the driven gear to the knife shaft 41 and the scarifying knives 42 or the steel claws 43 the scarifying unit 40 put into operation.

The embodiments described above merely represent preferred embodiments of the invention and in no way limit the scope of protection of the invention. Any insubstantial change or substitution made by those skilled in the art based on the present invention falls within the scope of the invention.

Commercial applicability

1. 1. Der erfindungsgemäße Gleichstrom-Vertikutierer zeichnet sich durch einfachen Aufbau, kleine Abmessungen, geringes Gewicht und hohe Flexibilität aus und kann zur Reduzierung der Arbeitsintensität und zur Erhöhung der Arbeitsleistung beitragen. Er eignet sich für den Ackerbau und das Vertikutieren auf Hügeln, gebirgigen Geländen, kleinen Grundstücken mit großen Höhenunterschieden, Bodenflächen mit Getreide sowie in Treibhäusern.
2. 2. Bei dem erfindungsgemäßen Gleichstrom-Vertikutierer ist zusätzlich eine Steuerung der Leistung des Gleichstrommotors, und zwar eine arbeitslastabhängige Steuerung der Ausgangsleistung des Elektromotors, mit Hilfe eines Steuergeräts vorgesehen, um Strom einzusparen.
3. 3. Der erfindungsgemäße Gleichstrom-Vertikutierer ist leicht umzusetzen und einfach zu bedienen.

The invention offers the following advantages over the prior art:

1. 1. The direct current scarifier according to the invention is characterized by a simple structure, small dimensions, light weight and high flexibility and can contribute to reducing the work intensity and increasing the work performance. It is suitable for arable farming and scarifying on hills, mountainous terrain, small plots of land with great differences in height, soil with grain and in greenhouses.
2. 2. In the direct current scarifier according to the invention, a control of the power of the direct current motor, specifically a workload-dependent control of the output power of the electric motor, is provided with the aid of a control device in order to save electricity.
3. 3. The direct current scarifier according to the invention is easy to implement and simple to operate.

Claims (10)

Direct current scarifier, comprising: - a main housing (10) for receiving a scarifier main body, - a handle (20) which is connected to the main housing in such a way that the scarifier main body can move under the action of an external force, - a Wheel set (30), which comprises a rear wheel set and a front wheel set and is attached to the underside of the main housing, characterized in that - the scarifier main body has a scarifying unit (40), a drive device (50) for driving the scarifying unit (40) and a drive control unit for controlling the operation of the scarifying unit (40), - the drive device (50) comprises a battery assembly (51) and a DC motor electrically connected to the battery assembly (51), a battery compartment (11) in the main housing (10) for the battery assembly (51) and a receiving space (12) for the DC motor, in which battery compartment ( 11) a holder serving to fasten the battery assembly (51) is arranged. DC scarifier after Claim 1 , characterized in that a brushless direct current motor (52) is used as the direct current motor, which has a motor shaft (531), a stator (533) placed on the motor shaft (531), a two-part plastic coil carrier interacting with the stator (533) and a Includes rotor assembly. DC scarifier after Claim 2 , characterized in that the rotor assembly a pull housing (536) located on the outer circumference of the stator (533), a cage (534) arranged inside the pull housing (536) and cooperating with the pull housing (536) and a permanent magnet (535) fastened to the inner wall of the pull housing (536) , which permanent magnet comprises a south pole electrical steel sheet and a north pole electrical steel sheet, with fastening grooves extending in the axial direction for fastening the south pole electrical sheet and the north pole electrical sheet being formed on the inner wall of the pulling housing (536), the south pole electrical sheet and the North pole electrical sheet are fastened offset to one another by means of the fastening grooves on the pull housing (536). DC scarifier after Claim 2 , characterized in that the two-part plastic coil carrier comprises a first plastic coil carrier (5321) and a second plastic coil carrier (5322), with a ventilation channel between the first plastic coil carrier (5321) and the second plastic coil carrier (5322) is trained. DC scarifier after Claim 2 characterized in that the rotor assembly further comprises fan blades (537) located at one end of the motor shaft (531) and a mounting plate (538) located at the other end of the motor shaft. DC scarifier according to one of the Claims 2 to 5 , characterized in that the scarifying unit (40) comprises a knife shaft (41) and a set of scarifying knives (42) or steel claws (43) fastened to the knife shaft (41), with one on the underside of the main housing (10) for fastening the knife shaft ( 41) serving bracket is arranged and the cutter shaft (41) is connected to the motor shaft (531) of the brushless DC motor (52) via a belt wheel set, which belt wheel set comprises a drive wheel, a driven wheel and a belt connected to the drive wheel and the driven wheel, wherein the drive gear is attached to the motor shaft and the output gear is attached to the cutter shaft (41). DC scarifier according to one of the Claims 2 to 5 , characterized in that the drive control unit comprises a control unit (61) for controlling the output power of the direct current motor and a control switch (62) serving to switch the control unit (61) on and off, the control unit (61) having both the control switch (62) and is electrically connected to the brushless DC motor (52). DC scarifier after Claim 7 , characterized in that the control switch is arranged on the handle and comprises a switch button (621) and a switch operating lever (622) which are electrically connected to one another. DC scarifier according to one of the Claims 2 to 5 , characterized in that the battery assembly is a lithium battery pack. DC scarifier after Claim 1 or 2 , characterized in that the direct current scarifier further comprises a waste funnel (70) attached to the rear end of the main housing (10) behind the scarifier unit (40).

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