JP2023547780A - Machines with energy supply of rotating elements - Google Patents

Abstract

an element, specifically a rotating element, operable with an inductance moving or rotating with the rotating element, configured to provide electrical energy in a magnetic field when in motion; an element that includes a consumer that moves or rotates together with a rotating element;

Description

Embodiments of the present disclosure refer to elements such as rotating elements, in particular (rotating) elements provided with a certain type of energy supply means. Further embodiments refer to drill chucks or drill holders. Further embodiments refer to machines, in particular ball or milling machines with rotating elements.

Drill chuck is a classic rotating element, which mainly has only mechanical functions. A typical function is to hold a tool such as a drill and drive the tool with the rotational energy of the drilling machine. Three different types of drill chucks or drill connections are used in the prior art. According to one variant, the drill chuck can have means for engagement both on the rotating drive side and on the rotating driven or output side. On the drive side, the drill chuck is then coupled to the rotating shaft of the drilling machine, while on the driven side, for example, a quick release connection can be used to chuck the drill. Alternatively, it is also possible to connect the tool or the drill fixedly to the drill chuck and to constantly change the entire drill chuck together with the tool. According to a third variant, it is also possible to connect the drill chuck fixedly to the drilling machine, such that the drill chuck, for example implemented as a quick-release drill chuck, then holds different tools. In all variants, the drill chuck is provided as a certain type of coupling between a rotating shaft and a rotating tool. Regarding automation and monitoring, sensor technology is provided, and in some cases sensors are also attached to rotating members. This electronic system can be powered using a battery, for example.

An object of the present disclosure is to provide a rotating element, such as a drill chuck, with an electronic system.

This object is achieved by the subject matter of the independent claims.

Embodiments of the invention provide an element, in particular a rotating or rotatable element, which has an inductance that moves/rotates together with the (rotating) element and an inductance that moves/rotates together with the (rotating) element. and a rotating consumer. The inductance is configured to provide electrical energy during movement, such as rotational movement within a magnetic field. The consumer operates with the electrical energy provided.

According to embodiments, the consumer can include an electronic system. According to embodiments, the electronic system may then include actuators (such as ultrasonic actuators or control elements) and/or sensor technology configured to output (sensor) information. For example, the sensor information can be information regarding force, vibration, acoustics, mechanical tension, temperature, torque, rotational speed and/or acceleration.

According to embodiments, the motion relates to a rotational motion caused by the rotation of the rotatable element, while other forms of motion such as periodic motion or (also) impulsive motion decoupled from the rotation of the rotatable element It should be noted that this is also adopted.

Embodiments of the invention generally provide that in a rotating or rotatable element for supplying electricity to an element, in particular a consumer within the element, when the (rotating or rotatable) element is in motion in a magnetic field, It is based on the discovery that electrical energy can be obtained using a coil or inductance. For example, it is possible here that a magnetic field is applied externally, i.e. a magnetic field is generated or provided around a rotating element, such that electricity is induced as a result of the movement of the rotating element, such as rotation within the magnetic field. It is. According to an embodiment, it is conceivable to arrange a magnet for providing the magnetic field in the casing of the drilling machine in the region of the drill chuck. In an embodiment, it is advantageous that a consumer rotating together with the rotating element can be supplied with electricity directly through the rotating inductance. As a result, there is no wiring work by the wiper to supply electrical energy or to transmit electrical signals from non-rotating elements to rotating elements. In addition, interface problems when exchanging rotating elements are avoided.

According to an embodiment, the rotating element has an energy supply circuit coupled to the inductance and thereby providing electrical energy. Here, the energy supply circuit can have a rectifier and/or a buffer and/or a capacitor and/or an accumulator. The energy supply circuit advantageously makes it possible to provide a continuous energy signal to the consumer or electronic system relatively independently of the speed of movement (rotational speed). In addition, in the event of a stop, a continuous energy supply of the consumer can be guaranteed by the energy supply circuit with a buffer.

As mentioned above, according to embodiments the consumer can be configured as a certain type of sensor technology or actuator technology. Here it is possible to integrate tachometers, accelerometers, dynamometers or vibrometers. According to embodiments, inductance functions as a sensor technology. Inductive signals, such as induced electricity, are used as measurement signals, since they allow physical quantities such as rotational speed or vibrations to be estimated. Additionally, actuators such as ultrasonic actuators can be provided to improve chip formation during drilling operations.

According to further embodiments, the sensor technology may transmit the acquired information to the outside world via wireless. Similarly, actuators can also be controlled by wireless models. As an alternative to external information communication, it would also be possible to display the information directly, for example using a display integrated in the rotating element. The latter can be configured, for example, through color-coded LEDs (color-coded status information). For example, certain types of acoustic indications with audio warnings in case of overload may be possible.

Having explained the function of the consumer in detail, the implementation of the energy harvesting function, i.e. the inductance, will be dealt with below.

According to embodiments, the inductance can be formed by one or more coils. Here, each coil can optionally be implemented with a ferrite core or another core. According to an embodiment, a plurality of coils are present for the inductance, distributed translationally or evenly around the axis of rotation of the rotating element. The coils must then be electrically connected to one another via an electrical circuit in a suitable manner to combine the individual energy outputs and make these outputs collectively available to the consumer. A translational arrangement of multiple coils is advantageous because a higher energy yield is achieved. According to embodiments, the electrical energy provided depends on the number of inductances. According to a further embodiment, the energy provided may depend on the dimensions of the inductance and also on the dimensions of the element generating the magnetic field. Viewed longitudinally, ie along the longitudinal axis, for example, the inductance can be arranged in the first half, while the consumer can be arranged in the second half. For example, the first half can be the side to which a rotating element with an output, such as a drilling machine, is connected. In this respect, according to an embodiment, in the first half the rotating element has a predetermined type of coupling for mechanical connection with the rotating machine. According to an embodiment, the rotating element in the second half can have a tool holder for a tool or a drill.

A preferred embodiment refers to a drill chuck or drill holder with rotating elements. A further embodiment refers to a rotating machine, in particular a drilling machine, with a rotating element and a rotating off drive. Here, the rotating element is coupled to a rotation-off drive. For example, according to embodiments, the coupling between the rotary element and the rotary-off drive can be constituted by a quick release of a certain type. This is particularly effective when exchanging rotating elements during tool exchange. Such devices are frequently installed on highly automated ball or milling machines, and can employ a variety of drill heads using revolver heads.

Regarding the element generating the magnetic field, it is noted that, according to the embodiments, one or more magnets are provided in the region of the off-drive of the rotating element of the rotating machine and/or in the region of the inductance. Should. This advantageously makes it possible to keep the magnet stationary during rotation of the rotating element. In this respect, the movement of the rotating element causing the induction of electrical energy will be a rotational movement in this embodiment. According to an embodiment, the rotating element is arranged rotationally along the axis of rotation. A crescent-shaped arrangement is also possible. Advantageously, such an arrangement still makes it possible to provide good access to this area. This arrangement on the drilling machine is advantageous overall, since here it is also possible to modify it, for example by subsequently arranging the holder. According to an embodiment, the magnets are arranged with alternating polarity, for example in the form of a Halbach array. This arrangement makes it possible to change the magnetic field significantly, making it possible to obtain large amounts of electrical energy.

It should be noted that even though in the above embodiments the elements have been assumed to be rotating or rotatable elements, any kind of other elements can be employed here. A further embodiment therefore provides an inductance that is movable or rotatable together with the element, the element being configured to provide electrical energy upon movement within a magnetic field, as well as the An element is provided with a consumer that is operable and moves or rotates with the element.

Further features are defined in the subclaims. Embodiments of the invention will be described with reference to the accompanying drawings.

1 is a schematic block circuit diagram of a rotating element according to a basic embodiment; FIG. 3 is a schematic diagram of a rotating element according to a further embodiment; FIG. 3 is a schematic diagram of a rotating element according to a further embodiment; FIG. 2 is a schematic diagram showing possible arrangements of coils and magnets and the resulting power; FIG. 2 is a schematic diagram showing possible arrangements of coils and magnets and the resulting power; FIG.

Before describing embodiments of the invention below with reference to the accompanying drawings, it will be noted that elements and structures having the same effect are provided with the same reference numerals and that the descriptions thereof are applicable and/or interchangeable with each other. It should be noted that

FIG. 1 shows a rotary element 10, here in the form of a drill chuck or drill holder, driven by an optional output element, here an output shaft 12. FIG. The rotating element has one or more inductances 14a and/or 14b, for example in the upper half. In addition to the inductances 14a and 14b, the rotating element has a consumer 16. It should be noted here that the rotating element does not necessarily have to rotate, but should normally be rotatable.

According to embodiments, the rotational element can extend around a rotational axis (see reference number 10r).

Similarly, an external magnet, ie not belonging to the rotating element, is now arranged around the axis of rotation and provides a magnetic field M. Although it is not important here how the magnetic field M is provided through the magnet 18, it should be noted that the magnetic field M is preferably present in the region where the coils 14a and 14b can move.

For the sake of completeness, it should be noted that the rotating element 10 can be a drill chuck, for example as illustrated by the drill 11. The drill 11 rotates in the direction R on the rotating shaft 10r. It should be noted that while rotation in direction R constitutes movement, movement here does not necessarily have to be rotation. A motion R of the coils 14a and 14b, which can be arranged translationally around the axis of rotation 10r, results in a motion of the coils 14a and 14b in the magnetic field M. As a result, the consumer 16 is provided with induced electricity. This induced electricity constitutes the resulting energy E.

Energy is therefore advantageously generated on the basis of the rotational movement, so that the electronic system embedded in the rotating element 10 can operate in an energy self-sufficient manner. For example, the electronic system may be a sensor technology and/or an actuator technology and/or a communication device, such as a wireless communication means, which is subsequently supplied with energy. Energy can thus be supplied wirelessly to the consumer 16, and wiper contacts for supplying voltage can be dispensed with.

It should be noted that even though the rotating element 10 has been described in the above embodiments as a type of ball or milling tool, other applications are possible, such as in the form of a turbine or windmill. For example, assuming that the rotating element 10 constitutes the hub of a turbine or windmill, electronic systems such as rotational speed sensor technology or actuator technology can be provided to adjust the turbine wheel. Similarly, it can also be used in conveyor belts such as roller conveyors. Here, the rotating element is embedded in the support element of the roller conveyor, making it possible here to monitor or drive the conveyor belt. Further applications include integration in bearings, drive wheels, or wheels in general. In this embodiment it is essential that an external magnetic field can be provided. This is possible, for example, in the above-mentioned turbines, windmills, conveyors or bearings, since magnets can be attached to the corresponding bearing blocks. In the case of drives or wheels, it is likewise conceivable to provide magnets, for example in the area of possible brake systems or suspensions.

A further embodiment refers to a coupling such as a slip clutch or the like to be internally sensed or controlled. The coupling has the function of connecting two rotating elements to each other or transmitting general rotational energy, which is also the case here in the embodiment of FIG. 1. Here, a rotating element is transmitted from the output element 12 to the drill 11, the rotating element 10 forming a coupling.

Hereinafter, a further embodiment of a drill chuck will be described with reference to FIGS. 2a and 2b.

Figure 2a shows the rotating element 10' in an unlatched state, whereas the rotating element 10' is correspondingly latched in Figure 2b. Latching refers to the driven side labeled 12', 12g', and 18.

Basically, the output element consists of two elements, in particular a stationary part 12g' associated with the spindle, and a spindle 12' which constitutes the rotating part of the tool machine. The output element or output shaft 12' is supported in a predetermined type of bearing/bearing block/housing 12g' or generally in a stationary portion 12g'. The magnet is connected to the stationary part 12g'. For example, these magnets are arranged rotationally symmetrically or simply semicircularly around the rotation axis 10r.

The rotating element 10' has a cylindrical shape, and the rotating element 10' comprises an engagement portion 10k1' of a predetermined type realized in the first half of the cylinder, by means of which the rotating element 10' It is connected to the rotating spindle 12' of the machine tool (see Figure 2b). There may be a further engagement portion 10k2' in the second half for coupling the tool 11. In this embodiment, the second engagement portion 10k2' is realized through a screw or grub screw that applies a force perpendicular to the axis of rotation 10r' onto the tool 11 inserted into the drill chuck 10', thereby 11 is fixed.

Electronically speaking, the rotating element 10' includes at least one or more inductances 14 for harvesting energy. These inductances 14 are arranged in the first half ( (see coupling 10k1'). In addition, the rotating element 10' also has an energy consumer. While here the energy consumer includes three elements, other configurations according to further embodiments can also be adopted. The three elements are the antenna and radio module 16f', the control electronics and data rendering 16p' (typically a processor), and the sensor technology 16s'. In this embodiment, sensor technology is placed in the area of the coupling 10k2' and serves to monitor the tool 11. For example, transmitted torque, vibration, temperature, etc. can be monitored. The data acquired through the sensor 16s' is subsequently rendered by the processor 16p' and transmitted externally via wireless through a wireless module 16' which also has an integrated antenna. The power supply of all three elements 16f', 16p' and 16s' is carried out by an inductance 14. Here, the inductance 14 is connected to an electrical supply element (part of an electronic system) that provides the processing of the electrical energy and performs the summation of the individual yields of the inductance, for example through rectification, intermediate storage or buffering. It should be noted that it is also possible to Buffering plays an important role when there is no movement r of the inductance 14 within the magnetic field M provided through the magnet 18. Therefore, components 16t', 16p', and 16s' can be supplied with energy even immediately after they have been energized.

Regarding the movement R, it should be noted that in this embodiment it is also assumed that the inductance 14 has a rotational movement within the magnetic field M of the magnet 18. Harvesting such motion and energy is common in generators, but here, in contrast to generators, the energy is not transferred externally by the coil 14, but is dissipated internally in the rotating element 10'. Ru. According to embodiments, it is not essential that a rotational movement 10r occurs. For example, assuming a hammer drill, the rotational movement can also have a lifting portion along the axis of rotation 10r. Therefore, periodic motion is generally assumed. In extreme cases, rotating parts may be omitted entirely, as in the case of chisel or riveting machines. The rotational movement 10r, the rotational movement with a lifting section, or all variants of the lifting section have in common only that the inductance 14 moves within the magnetic field M provided through the magnet 18. While according to embodiments a periodic movement can be envisaged, it is not essential that this movement be regular. Here, the energy harvesting is indicated by the arrow in Figure 2b.

As shown by Figures 2a and 2b, the combination of elements 14 and 18 thus facilitates the energy conversion of rotational motion into electrical energy. Here, elements 14 and 18 together form an electrodynamic generator. This makes it possible to supply energy to wireless sensor technology so that it can be employed self-sufficiently and wirelessly in rotating elements such as chucks, for example. Wireless transmission from rotating metal systems employs various wireless standards (eg, UWIN, Bluetooth®, BLE, analog radio, or other variants).

It should be noted that even though in the above embodiments the element 16s' has been assumed to function as sensor technology, actuator technology such as piezo actuator technology can also be employed here. While actuator technology has higher energy demands, it will be explained below how the combination of elements 14 and 18 can meet higher energy demands. On the other hand, higher energy demands depend not only on the other applications, but also on the other hand on the different sizes of the rotating element 10'.

As already explained in connection with FIG. 1, according to a preferred variant the arrangement of the inductances 14, or more particularly 14a and 14b, is such that these inductances extend translationally around the axis of rotation. It is designed to. For example, assuming two or three coils 14, according to one embodiment each coil core extends perpendicular to the axis of rotation 10r. In the case of two coils, the axes of the coils are preferably arranged at an angle of 180°, while in the case of three coils an arrangement of 120° is possible. Varying energy demands can be adjusted by the number of coils. Therefore, even using the same magnet 18, lower energy can be obtained with a small rotating element 10' than with a large rotating element with multiple integrated coils. Alternatively or additionally, the dimensions of the coil may also be varied according to further embodiments. The arrangement and dimensions of the magnets 18 provide a further variant possibility of varying the active power. In Fig. 3b, the active power in the coil is shown for different rotational speeds at different magnet heights, illustrated by a total of 6 figures. A further variable (see X-axis) is the number of bending angles employed. Now assume that the magnets are mounted using different curvature angles. As can be seen, adopting additional curvature angles increases the power generated. Similarly, higher rotational speeds result in increased power. Similarly, power increases with magnet height. For example, assuming that 18 watts (adopting a curvature angle of 240° with a 16 mm magnet at 9000 revolutions per minute) is produced per coil, for example, if you adopt 18 coils, you will get a maximum of 200 watts of power. I can do it.

It should be noted here that not only the spatial angle used is important, but also the number of magnets. Here, it is assumed that 12 magnets are employed at a spatial angle of 240°. Needless to say, different numbers are possible. Furthermore, spatial angles >240°, for example 360°, are conceivable. All these factors contribute to being able to properly scale the electrically transmitted power.

It should be noted here that the magnets cannot be placed arbitrarily close to each other, as becomes clear with respect to Figure 3a.

FIG. 3a shows a view of the magnets 18a, 18b, and 18c in the axial direction interacting with the coil 14. The magnets 18a, 18b, and 18c each form magnetic field lines M, indicated here by regions as appropriate. A coil placed tangentially to the iron tool holder moves in a magnetic field M. The coil can include, for example, a ferrite core. The magnetic flux density is shown in gray scale, and the white line shows the magnetic vector potential (Wb/m) in the Z direction.

Figure 3b shows the values of magnetic flux density. In the embodiment from Figure 3b, the magnets are assumed to be oriented in an alternating manner, thereby maximizing the magnetic flux variation. Further arrangements/adjustments are also conceivable, for example in the form of a Halbach arrangement, or an evenly oriented arrangement, which would maximize the magnetic flux within the area of inductance.

In the embodiments above, it has been specifically assumed that there is a rotational movement. As already mentioned, other movements are also conceivable, such as periodic or uncorrelated movements. According to a further embodiment, the rotating element does not even have to be a rotating element, but may for example be a simple element that only performs a lifting movement along the axis 10r from FIG. 1. During periodic lift movements, etc., coils 14a and 14b also move within the magnetic field provided by magnet 18, resulting in the induction of electricity in the moving elements.

It should be noted here that it is not mandatory to employ magnets. However, other magnetic field generating elements such as electromagnets can also be employed, which advantageously facilitates controlling the magnetic field strength.

According to embodiments, the magnets can be arranged in circular segments, such as semicircular segments, or smaller circular segments, or larger circular segments. For example, an arrangement in the range from 20 or 30 degrees to 330 or 340 degrees, or preferably between 60 and 270 degrees, but also between 90 and 180 degrees, is conceivable. Any value within the given range would be possible. The arrangement by circular arc segments is advantageous because this may increase the achievable energy yield, while at the same time the circular segments remain open and accessibility is maintained.

It should be noted here that the magnets can be arranged both radially and axially around the element. For example, in the case of a radial arrangement, this runs, for example, along arc segments along a radius arranged parallel or perpendicular to the axis of rotation. In the case of an axial arrangement, the rotating element can protrude, the magnet then protruding from the housing side up to the protruding edge.

It has been explained in the above embodiments that for example an energy supply circuit with a capacitor or an accumulator can be provided. The accumulator can also be relatively large in size so that recharging occurs from short periods of exercise and the power dimension of the accumulator is high relative to possible dissipation. This is particularly considered for low power consumption consumers such as sensor technology.

A preferred embodiment describes the generation of electrical energy through rotation without a stator, and specifically the generation of electrical energy in a rotating object for supplying a wireless sensor. For this purpose, an inductance that moves relative to a fixed magnet is employed. The inductance consists of one or more windings and is connected to the rectifier and the energy supply unit. The magnet is placed on the rotating object. However, the magnet is arranged such that relative movement can occur with respect to the inductance. The energy supply unit can supply sensors, actuators or wireless modules. The sensor detects information about the rotating object and transmits this information wirelessly. The wireless module can also receive data to control the actuator. For example, the system can be applied to drill chucks, couplings, or shafts.

It should be noted here that the embodiments described above are merely exemplary and the scope of protection shall be defined by the following claims.

12, 12' Output element 10, 10' Rotating element 18 Magnet 14, 14a, 14b Inductance 11 Tool 10k1' First half 10k2' Second half R Movement 10r Rotating axis 16 Consumer M Magnetic field E Energy 16f' Wireless module 16s' sensor

Claims (16)

A machine, in particular a drilling machine, comprising a rotary output element (12, 12') and an element (10, 10'), in particular a rotary element (10, 10'), said element (10, 10') ) is coupled to the rotary output element (12, 12'), and the element (10, 10')
an inductance (14, 14a, 14b) moving or rotating together with said element (10, 10'), configured to provide electrical energy (E) upon movement (R) in a magnetic field (M); )and,
a consumer (16) moving or rotating together with said element (10, 10'), operable by said provided electrical energy (E);
including;
A plurality of magnets (18) are arranged in a circular segment shape around the rotation axis (10R) of the element (10, 10'),
machine. Machine according to claim 1, characterized in that the consumer (16) comprises an electronic system. the inductance (14, 14a, 14b) is coupled to an energy supply circuit through which the electrical energy (E) is provided, or the inductance (14, 14a, 14b) is coupled to an energy supply circuit; Machine according to claim 1 or 2, wherein the electrical energy is provided through the energy supply circuit, the energy supply circuit comprising a rectifier and/or a buffer and/or a capacitor and/or an accumulator. Machine according to any one of claims 1 to 3, wherein the consumer (16) comprises actuator technology, an ultrasonic actuator and/or a control element. said electricity consumer (16) includes sensor technology configured to output information; or said electricity consumer (16) includes sensor technology (16s') configured to output information. , said sensor technology (16s') is configured to detect force, vibration, acoustics, mechanical tension, temperature, torque, rotational speed, and/or acceleration, and/or said inductance (14, 14a, 14b ) acts as a sensor technology (16s') and/or acts on the basis of an induced signal in said inductance (14, 14a, 14b) to provide a measurement signal inductance (14, 14a, 14b) and to provide a physical quantity. 5. The machine according to any one of claims 1 to 4, wherein the machine is configured in such a way that it is possible to estimate, in particular the rotational speed or the vibrations. Machine according to any one of claims 1 to 5, further comprising a wireless module (16s') configured to transmit information acquired in the element (10, 10') to the outside. said inductance (14, 14a, 14b) is formed by one or more coils, or said inductance (14, 14a, 14b) is formed by one or more coils with a ferrite core, or said inductance ( 14, 14a, 14b) is formed by a plurality of coils distributed translationally or evenly distributed around the axis of rotation (10R) of said element (10, 10') and/or said provided electricity 7. The method of claims 1 to 6, wherein the energy (E) depends on the number of inductances (14, 14a, 14b) and/or on the dimensions of said inductances (14, 14a, 14b) and on the magnetic field (M) present. A machine as described in any one of the preceding paragraphs. Claim: wherein the inductance (14, 14a, 14b) is arranged in a first half along the longitudinal axis and/or the consumer (16) is arranged in a second half along the longitudinal axis. 8. The machine according to any one of 1 to 7. Machine according to any one of the preceding claims, characterized in that the element (10, 10') comprises in a second half along the longitudinal axis a tool holder for a tool (11) and/or a drill. Machine according to any one of claims 1 to 9, wherein the element (10, 10') comprises a coupling for a mechanical connection to the machine in a first half along the longitudinal axis. Said element (10, 10') comprises a display, in particular a color display or an LED, configured to output status information or color-coded status information, or said element (10, 10') comprises: Machine according to any one of claims 1 to 10, comprising a display, in particular an acoustic display, configured to output status information or acoustic status information. Machine according to any one of claims 1 to 11, having a drill chuck or drill holder containing the element (10, 10'). Machine according to any one of claims 1 to 12, wherein the coupling between the element (10, 10') and the rotary output element (12, 12') is implemented by a quick connector. One or more magnets ( 18) is arranged such that during rotation of the element (10, 10') the magnet (18) remains stationary. machine. Machine according to any one of the preceding claims, characterized in that a plurality of magnets (18) are arranged in the shape of a semicircle around the axis of rotation (10r) of the element (10, 10'). Machine according to any one of the preceding claims, wherein the plurality of magnets (18) are arranged with alternating polarity and/or in the form of a Halbach arrangement.

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