System for generating electric energy in linear motion device

Abstract

System for generating electrical energy in a linear motion device comprising a first device part and a second device part, the second device part being supported on the first device part by means of a rolling element (WK) such that the second device part is linearly movable relative to the first device part. The system for generating electrical energy comprises: a rolling element (WK) configured to be movable in a direction of movement (BR) during operation of a linear motion device; the invention relates to a device (PM) for generating a static magnetic field in a spatial region (RB), through which a rolling element (WK) must pass continuously while moving in a movement direction (BR) during the operation of a linear motion device, said rolling element (WK) being made of a magnetically conductive material, such that the rolling element (WK) is adapted to influence the magnetic field as a function of the position of the rolling element (WK) in the spatial region (RB); and at least one induction coil (IS) having at least one coil winding, the at least one induction coil (IS) being fixedly arranged relative to the means (PM) for generating the static magnetic field in such a way that, during a movement of the rolling element (WK) in the movement direction (BR) through the spatial region (RB), the induction coil experiences a change in magnetic flux as a result of a change in the position of the rolling element (WK), thus, a voltage (Uind) is induced in the at least one coil winding.

Description

Technical Field

[0001] The invention relates to a system for generating electrical energy in a linear motion device, the linear motion device having a first device part and a second device part, wherein the second device part is supported on the first device part via rolling elements, so that the second device part is configured to be linearly movable relative to the first device part. In addition, the invention also relates to a linear motion device equipped with such a system, such as a profiled track guide with rolling elements, wherein the rolling elements are arranged between the first device part and the second device part movable relative to the first device part. Background Art

[0002] A linear motion device is a mechanical system that is constructed to achieve linear motion with minimal friction and high precision. The device combines a first device component (e.g., fixed) with a second device component that is movable relative to the first device component, wherein the specific properties and characteristics of the two components are variable.

[0003] In one embodiment of the linear motion device designed in the form of a profiled rail guide, the first device part consists of, for example, a metal guide rail. Depending on the specific design and technical requirements, this guide rail can have different profiles. It serves as a stable sliding and reference surface for the guide frame. In the case of a profiled rail guide, the guide frame, also called a guide block, moves along the guide rail. It thus forms a movable device part. Depending on its specific design, this guide frame can have different shapes and can be used for different purposes, such as transporting goods.

[0004] Another embodiment of a linear motion device is a ball screw, in which a precision machined spindle with a special helical profile is used as a fixed device part. The spindle serves as a guide and drive element for the movable device part, the spindle nut. In this ball screw, which represents an efficient way to convert rotary motion into linear motion, the spindle nut corresponds to the profile of the spindle and moves linearly along this profile as the spindle rotates.

[0005] A feature of many linear motion devices of this type is the integration of rolling elements. These rolling elements can be implemented in the form of balls or rollers and are strategically placed between the movable device components and the fixed device components to effectively reduce friction. The rolling elements in profiled track guides roll between the guide frame and the guide rails, while the rolling members in ball screws act between the threads of the spindle and the spindle nut, thereby converting rotary motion into linear motion.

[0006] Many modern applications of linear motion devices make use of sensors which can be arranged, for example, on a movable device part, such as a guide frame of a profiled rail guide. These sensors usually require electrical energy. In order to supply the sensors arranged on the guide frame with electrical energy, it is common practice to supply energy from an external energy source, for example via a cable connected to the guide frame. This has the disadvantage that the corresponding cable connections are usually expensive and prone to failure. Alternatively, batteries can be provided to realize the energy supply of the individual sensors, wherein the batteries are arranged on the guide frame, so that no cable connection to the external energy source is required. However, this also has disadvantages, because the batteries need to be replaced from time to time.

[0007] "Energy harvesting" refers to the process of taking energy from an external source and converting that energy into a usable form. In recent years, this concept has become increasingly important in many areas of technology, especially in creating sustainable and energy-efficient technical solutions. There are good reasons to adopt energy harvesting solutions, especially in linear motion devices such as profiled rail guides, ball screws and other mechanical systems that play an important role in automation technology and precision engineering.

[0008] In battery-operated linear motion devices, energy harvesting can extend the life of the battery by using an additional energy source. Many modern applications utilize sensors distributed in many locations, such as on the movable device components of the linear motion device, such as the guide frame. These sensors require energy, and in many cases it is not feasible to regularly provide these sensors with new batteries. Energy harvesters can remedy this situation. Various technologies that convert kinetic or thermal energy generated during the operation of a mechanical device into electrical energy and reuse it are already under development or in use. These technologies include mechanical structures such as friction wheels or pressure wheels, piezoelectric materials that generate electricity from mechanical pressure caused by vibrations during operation, and thermoelectric generators (TEGs) that obtain electricity from temperature differences, such as the temperature difference between the guide frame and its surroundings. However, in linear motion devices, these technologies are usually not efficient enough to generate large amounts of energy. Summary of the invention

[0009] Therefore, the object of the present invention is to eliminate the disadvantages of the above-mentioned technical solutions and provide a system for generating electrical energy in a linear motion device, and a linear motion device equipped with such a system, which can realize efficient, flexible and cost-effective energy collection.

[0010] According to the invention, the above-mentioned object is achieved by a system for generating electrical energy in a linear motion device having the features as claimed in claim 1 and a linear motion device having the features as claimed in claim 35 .

[0011] The system for generating electrical energy is intended for use with a linear motion device having a first device component and a second device component, wherein the second device component is supported on the first device component by a rolling element, such that the second device component is configured to be linearly movable relative to the first device component, and when the second device component moves relative to the first device component during operation of the linear motion device, the rolling element moves relative to the first device component and the second device component.

[0012] According to the present invention, a system for generating electrical energy comprises: a rolling element configured to be movable along a moving direction during operation of a linear motion device; a device for generating a static magnetic field in a spatial region, wherein during operation of the linear motion device, the rolling element must continuously pass through the spatial region when moving along the moving direction, wherein the rolling element is composed of a magnetically conductive material so that the rolling element is suitable for influencing the magnetic field according to the position of the rolling element in this spatial region; and at least one induction coil having at least one coil winding, wherein the at least one induction coil is fixedly arranged relative to the device for generating a static magnetic field, so that during movement of the rolling element through the spatial region along the moving direction, due to a change in the position of the rolling element, the induction coil (or the at least one coil winding) experiences a change in magnetic flux, thereby inducing a voltage in the at least one winding.

[0013] The present invention for generating electrical energy in a linear motion device has several advantages.

[0014] The system converts the mechanical energy generated by the movement of a second device component (e.g. a guide frame or guide shoe of a profiled rail guide) along a first device component (e.g. a guide rail of a profiled rail guide) directly into electrical energy. This makes it possible to efficiently utilize the existing kinetic energy.

[0015] The recovered electrical energy can be used to power electrical devices such as sensors, processors or communication interfaces located on the movable device parts (e.g. guide frames or guide blocks). In this way, the need for external energy sources can be reduced or even eliminated.

[0016] The electrical energy generated can be accumulated and stored in energy storage until needed. This can extend the life of battery-powered systems or reduce the need for regular battery replacement.

[0017] The system can be directly integrated into existing linear motion devices, such as profiled rail guides or ball screws (recirculating ball screws). No additional moving parts are required, which increases reliability and durability.

[0018] The rolling elements themselves do not have to be permanently magnetized elements. The rolling elements only need to contain a magnetically conductive material which reacts to an external magnetic field provided by the device for generating a static magnetic field, so that, for example with respect to the spatial distribution of the field lines or with respect to the field strength of the magnetic field, the respective rolling element influences the magnetic field generated in the vicinity of the rolling element. As a result, the magnetic field in the vicinity of the rolling elements depends on the current position of the respective rolling element with respect to the direction and / or magnitude of the magnetic field strength. Thus, during the movement of the rolling element relative to the induction coil (i.e. during the movement of the first device part relative to the second device part), the magnetic flux changes, so that a voltage is induced in at least one winding of the induction coil due to electromagnetic induction.

[0019] Due to the use of rolling elements made of soft magnetic material (e.g. steel), a relatively high magnetic permeability is achieved. This increases the efficiency of the energy conversion, since the rolling elements effectively influence the spatial distribution of the magnetic field lines.

[0020] During the movement of the second device part (e.g. guide frame or guide block) relative to the first device part, a voltage is periodically induced in the induction coil due to electromagnetic induction. This is very useful for applications that require or can use such a periodic energy source.

[0021] The figures show a number of embodiments that differ in the construction of the magnetic field generator and the arrangement of the induction coils. This provides the developer with a high degree of flexibility in adapting the design to specific application or construction requirements.

[0022] According to a preferred embodiment of the system according to the invention, it is proposed that the means for generating a static magnetic field are formed by permanent magnets of a hard magnetic material.

[0023] The use of permanent magnets of hard magnetic material in the preferred embodiment has several advantages. Permanent magnets of hard magnetic material ensure a constant and stable magnetic field, which is not affected by external influences or the arrangement of rolling elements. Permanent magnets of hard magnetic material have a long service life and lose their magnetic force very slowly over time. No external energy is required for the operation of the system, because the magnetic field is generated by the permanent magnets.

[0024] According to an improvement of this preferred embodiment, it is proposed that the permanent magnet is basically implemented in a U-shaped manner, wherein its two ends have different magnetic polarities, and the space between the two ends is penetrated by the magnetic field lines of the static magnetic field and is designed to be passed through by rolling elements during operation of the linear motion device.

[0025] Due to the U-shaped design of the permanent magnet, the magnetic field lines are concentrated between the two ends of the permanent magnet. Due to the special arrangement, most of the magnetic flux of the magnetic field generated by the permanent magnet is concentrated on the rolling elements. This ensures optimal utilization of the magnetic field.

[0026] The rolling elements used can be implemented either in the form of balls or in the form of rollers, wherein these options offer flexibility in construction. The distribution of the magnetic field lines changes depending on the position of the rolling elements and results in different magnetic field strengths and distributions. This property can be used to control and regulate the magnetic field. Since the permanent magnets consist of hard magnetic material, the distribution of the magnetic field lines inside the magnet is not affected or only slightly affected by the position of the rolling elements. This ensures constant performance of the system.

[0027] In another preferred embodiment of the system according to the invention, the means for generating a static magnetic field is formed by a magnetized element and comprises: A permanent magnet made of hard magnetic material with different magnetic polarities at its two ends; and Two flux conducting components, wherein a first end portion of a first flux conducting component is connected to one end of the permanent magnet, and a first end portion of a second flux conducting component is connected to an opposite end of the permanent magnet.

[0028] This alternative embodiment differs from the previous embodiment and its improvements in that magnetic flux conducting components are added. These magnetic flux conducting components are composed of soft magnetic materials with high relative magnetic permeability and play a vital role in manipulating and controlling the magnetic field generated by the permanent magnets.

[0029] The main advantage of this alternative embodiment compared to the embodiment with permanent magnets (without flux conducting components) is that the magnetic flux can be improved controlled and manipulated, in particular for the induction coil. By appropriately selecting the shape of the respective flux conducting components and the relative magnetic permeability of the respective material of the flux conducting components, the flux conducting components are made capable of adjusting the magnetic field, in particular the spatial distribution of the magnetic field lines and the magnetic field strength, depending on the respective arrangement of the permanent magnets, rolling elements and induction coils relative to each other.

[0030] Thus, this alternative embodiment provides improved magnetic field control and maximum induced voltage while minimizing potential energy losses (particularly caused by the generation of eddy currents in the flux conducting components during the movement of the rolling elements relative to the respective flux conducting components), especially in the case where the flux conducting components are configured in the form of a laminated sheet package (i.e. a stacked arrangement of a plurality of sheets or foils of soft magnetic material electrically insulated from one another), which is suitable for preventing the formation of eddy currents in the flux conducting components during the movement of the rolling elements. Therefore, this alternative embodiment is very effective and particularly fruitful.

[0031] According to a preferred variation of the above embodiment, a pole shoe of soft magnetic material may be provided on a second end of at least one of the two flux conducting components, wherein the second end is adjacent to at least one induction coil to optimize the spatial distribution of magnetic field lines around the at least one induction coil.

[0032] The use of pole shoes of soft magnetic material allows the spatial distribution of the magnetic field lines around the induction coil to be optimized. It can be seen that the main goal of this optimization is to maximize the electrical energy generated during the movement of the movable device part of the linear motion device. This means that a larger part of the mechanical energy of the movable device part is converted into electrical energy. The shape of the pole shoe and the relative magnetic permeability of the pole shoe material can be appropriately selected to achieve the best effect. The shape of the pole shoe can vary depending on the shape of the rolling element and the arrangement of the coil windings of the induction coil.

[0033] According to another alternative embodiment of the system of the present invention, it is proposed that the device for generating a static magnetic field includes two U-shaped magnetized elements, which are respectively composed of a permanent magnet and an L-shaped flux conducting component, and are arranged at a certain distance from each other and are mirror-symmetrical with respect to the moving direction of the rolling element, wherein during the operation of the linear motion device, the rolling element continuously passes through the space between the two magnetized elements penetrated by the magnetic lines of force of the static magnetic field.

[0034] The magnetic flux density in the space between the two magnetized elements changes as the position of the rolling element changes, allowing the magnetic field strength to be adjusted for certain applications. The change in position of the rolling element and the associated change in the magnetic flux induces a voltage in the induction coil, which can be used to generate and recover energy.

[0035] Since the magnetic field lines extend parallel to the direction of movement of the rolling elements at least in certain areas, this alternative embodiment differs from the other embodiments and may be advantageous in certain applications requiring a specific interaction between the magnetic field and the rolling elements. In summary, this alternative embodiment provides a very promising method for generating and controlling the magnetic field of rolling elements, especially considering the high potential for energy recovery.

[0036] According to another alternative embodiment of the system according to the invention, a device for generating a static magnetic field is proposed, which comprises two magnetized elements which are identical and have an E-shaped profile, wherein the magnetized elements are arranged at a certain distance from each other and in a mirror-symmetrical manner with respect to the movement direction of the rolling element, wherein the E-shaped profile has three legs, the permanent magnet is arranged on the middle leg, and, during operation of the linear motion device, the rolling element sequentially passes through the space between the two magnetized elements penetrated by the magnetic field lines of the static magnetic field.

[0037] Due to the mirror-symmetrical arrangement of the two magnetized elements, a uniform and consistent magnetic field is formed in the space between the two magnetized elements with the E-shaped profile. This enables reliable interaction with the rolling elements passing through. In addition, the E-shaped profile with three legs can generate specific magnetic field configurations. In this case, the middle leg with the permanent magnet can be used to generate a strong central magnetic field in the area where the rolling elements move.

[0038] Since the rolling elements sequentially pass through the space penetrated by the magnetic field lines during operation, a continuous magnetic interaction can be ensured, which contributes to the efficient generation or recovery of energy.

[0039] The linear motion device of the present invention having a first device part and a second device part has at least one system of the present invention for generating electrical energy, wherein the second device part is supported on the first device part by rolling elements so that the second device part is configured to be linearly movable relative to the first device part; and a device for generating a static magnetic field and at least one induction coil are fixedly arranged to the first device part or the second device part.

[0040] The advantages of the linear motion device of the present invention are obvious.

[0041] The linear motion device can convert the mechanical energy generated during the movement of the movable device parts (such as the guide frame or guide block) into electrical energy. This is called "energy harvesting".

[0042] The generated electrical energy can be directly stored in the first or second device part, wherein the device for generating a static magnetic field and the at least one induction coil are fixedly arranged on the first or second device part. This facilitates autonomous energy supply of electrical devices or systems (such as sensors, processors and communication interfaces) arranged on the device part, thereby reducing or eliminating the need for external energy sources or frequent battery replacement.

[0043] The system for generating electrical energy of the present invention is integrated into a linear motion device, which provides a compact and efficient technical solution without the need for any additional external devices or systems. In addition, the different embodiments of the system disclosed herein provide a high degree of flexibility in different applications or configurations of integration into a linear motion device.

[0044] Since the system for generating electrical energy of the present invention is primarily based on magnetism and induction, there are fewer moving parts that may be subject to wear, thereby extending the service life and reducing the maintenance requirements of the linear motion device.

[0045] Opportunities to recycle and reuse energy can reduce energy consumption, thereby reducing carbon emissions. Energy harvesting can reduce the need for permanent energy sources or regular battery replacement, which can also save costs in the long run. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Other advantages and features of the present invention can be obtained from the detailed description of several embodiments of the present invention with reference to the following drawings.

[0047] Figures 1 to 4 A sectional side view corresponding to a section extending parallel to the moving direction of the rolling element ( Figure 1 and 3) and extending perpendicular to the moving direction of the rolling elements Figure 1 and Figure 3 Cross-sectional top view of the middle section II-II and IV-IV ( Figure 2 and 4 ) shows a first embodiment of the system of the present invention for generating electrical energy in a linear motion device.

[0048] Figure 5 A schematic block diagram of converting mechanical energy in the linear motion device of the present invention into electrical energy, and subsequent storage and use is shown.

[0049] Figures 6 to 9 A sectional side view corresponding to a section extending parallel to the moving direction of the rolling element ( Figure 6 and 8 ), and extending perpendicular to the direction of movement of the rolling elements Figure 6 and 8 Cross-sectional top view on the middle sections VII-VII and IX-IX ( Figure 7 and 9 ) shows a second embodiment of the system of the present invention for generating electrical energy in a linear motion device.

[0050] Figures 10 to 13 A sectional side view corresponding to a section extending parallel to the moving direction of the rolling element ( Fig.10 and 12 ) and extending perpendicular to the direction of movement of the rolling elements Fig.10 and 12 Cross-sectional top view on the middle sections XI-XI and XIII-XIII ( Fig.11 and Fig.13 ) shows a third embodiment of the system of the present invention for generating electrical energy in a linear motion device.

[0051] Fig.14 and 15 A fourth embodiment of the system according to the invention for generating electrical energy in a linear motion device is shown in a sectional side view of the rolling element in different movement positions corresponding to a section extending parallel to the movement direction of the rolling element.

[0052] Fig.16 and 17 A fifth embodiment of the system according to the invention for generating electrical energy in a linear motion device is shown in a sectional side view of a rolling element in different movement positions corresponding to a section extending parallel to the movement direction of the rolling element.

[0053] Fig.18 and 19 A sectional side view corresponding to a section extending parallel to the moving direction of the rolling element ( Fig.18 ), and extending perpendicular to the direction of movement of the rolling elements Fig.18 Sectional top view on the middle section XIX-XIX ( Fig.19 ) shows a sixth embodiment of the system of the present invention for generating electrical energy in a linear motion device. DETAILED DESCRIPTION

[0054] The figures show different variations of the system of the invention for generating electrical energy for a linear motion device, such as a profiled track guide or a spindle guide / ball screw.

[0055] A linear motion device usually comprises a (in many cases stationary) first device part (guide part), for example a guide rail in a profiled track guide or a spindle or ball screw in a spindle guide. A second device part (guide part), for example a guide frame in a profiled track guide or a spindle nut or ball screw in a spindle guide, is guided on the first device part, wherein the second device part moves along the first device part and is supported on the first device part by rolling elements such as rollers or balls.

[0056] Linear motion devices can operate in different modes. In profiled track guides, especially rolling element recirculating guides, balls or rollers perform continuous rotational or cyclical movement along a closed path. These profiled track guides are often used in applications where a load must be moved continuously in both directions without the need for a return mechanism.

[0057] The system for generating electrical energy proposed in particular herein can be arranged on a movable device part of such a linear motion device. It comprises means PM, MK1, MK2, MK3 which generate a static magnetic field and define a spatial region RB through which rolling elements WK (rollers or balls) must move when the first device part moves relative to the second device part during operation of the linear motion device. These rolling elements WK consist of a magnetically conductive material, such as a soft magnetic material with a high magnetic permeability, i.e. they influence the distribution of the magnetic field lines FL of the static magnetic field.

[0058] When the second device part moves along the first device part, the magnetic field in the vicinity of the rolling elements WK (rollers or balls) changes depending on their current position relative to the respective means PM, MK1 , MK2 , MK3 for generating a static magnetic field.

[0059] In addition to the means PM, MK1, MK2, MK3 for generating a static magnetic field, at least one induction coil IS, IS1, IS2 having at least one winding is provided, respectively, and is arranged at a predetermined position (i.e. fixed) relative to the corresponding means PM, MK1, MK2, MK3 for generating an electrostatic field. Furthermore, the induction coil IS, IS1, IS2 is arranged so that the magnetic flux in the induction coil IS, IS1, IS2 changes over time due to changes in the magnetic field caused by the movement of the second device part relative to the first device part. According to the law of induction, these changes in the magnetic flux induce a voltage U in the induction coil IS, IS1, IS2 ind .

[0060] During the movement of the linear motion device, the induction coils IS, IS2, IS3 generate a voltage that varies with the time variation of the magnetic flux. This voltage can be converted into a DC voltage by conventional electronic components, and the generated electrical energy can be stored in the energy storage ES (see Figure 5 ).

[0061] In this process, which is often referred to as "energy harvesting", the mechanical energy of the movable device part is converted into electrical energy and stored. This stored electrical energy can be used to operate electrical components, such as sensors S1, S2, processors and communication interfaces KS arranged on the movable device part (see Figure 5 ).

[0062] The accompanying drawings show schematic diagrams for visualizing the effects of the related art. In particular, the distribution of magnetic field lines is schematically shown rather than accurately calculated.

[0063] The present invention proposes several embodiments, which differ in the construction of the means PM, MK1, MK2, MK3 for generating a static magnetic field, the spatial extent of the magnetic field lines relative to the movement direction BR of the rolling elements WK (rollers or balls), and the arrangement of the induction coils IS, IS2, IS3.

[0064] Figures 1 to 4 Different views of a first embodiment of the system according to the invention for generating electrical energy in a linear motion device are shown. These views show different operating states of the rolling elements WK relative to different arrangements of the means PM for generating a static magnetic field.

[0065] The rolling elements WK in these figures are realized in the form of balls, but it is also possible to use rolling elements WK in the form of rollers (see Fig.19 ).

[0066] In this case, the means PM for generating a static magnetic field consists of a single permanent magnet PM which is substantially implemented in a U-shaped manner and has different magnetic poles at its two ends.

[0067] The magnetic field lines FL extend in the spatial region RB between the two ends of the permanent magnet PM, minimizing the total energy of the magnetic field. As a result, a large part of the magnetic flux generated by the permanent magnet PM is concentrated in the rolling elements WK. Each individual rolling element WK has a corresponding magnetization corresponding to the spatial distribution of the magnetic field.

[0068] It is important that the arrangement of the rolling elements WK relative to the permanent magnets PM has no effect or only a small effect on the distribution of the magnetic field lines FL in the permanent magnets PM, since the permanent magnets consist of hard magnetic material.

[0069] Figures 1 to 4 Magnetic field lines FL are shown inside the rolling element WK, which extend essentially perpendicularly to the movement direction BR of the rolling element WK.

[0070] In this embodiment, the induction coil IS is arranged in a spatial region RB between the two ends of the permanent magnet PM, which is penetrated by the magnetic field lines FL and passed through by the rolling element WK. More precisely, the induction coil IS is arranged in a region between one end of the permanent magnet PM and a region continuously passed through by the rolling element WK during the movement of the movable second device part along the first device part.

[0071] The induction coil IS consists of one or more coil windings, which each extend in a ring around a central axis which is oriented substantially perpendicular to the direction of movement BR of the rolling element WK. This means that each coil winding of the induction coil IS encloses a surface area which is substantially parallel to the direction of movement BR of the rolling element WK.

[0072] exist Figure 1 and Figure 2 In the rolling element arrangement shown, the magnetic field in the region between the two ends of the permanent magnet PM is concentrated on the volume of a single rolling element WK. Therefore, the magnetic flux allocated to the coil winding of the induction coil IS is relatively high.

[0073] exist Figure 3 and Figure 4 In the rolling element arrangement shown, the distribution of the magnetic field lines FL is changed so that the magnetic field in the spatial region RB between the two ends of the permanent magnet PM is distributed over the volume of two consecutively arranged rolling elements WK. Figure 1 and Figure 2 In comparison, the magnetic flux allocated to the coil winding of the induction coil IS is significantly reduced.

[0074] Therefore, the rolling element WK changes from Figure 1 and Figure 2 Arrangement to Figure 3 and Figure 4The change in position will cause the magnetic flux in the induction coil IS area to change. This change in magnetic flux induces a voltage U in the coil winding of the induction coil IS. ind , as shown by the AC voltage symbol “~” at the end of the induction coil IS winding.

[0075] Figure 5 The process of converting mechanical energy into electrical energy in the linear motion device of the present invention is schematically shown. In this embodiment, the linear motion device is Figure 5 The profiled rail guide 10 shown has a guide frame 20 and a guide rail 15. In this example, the guide frame 20 of the profiled rail guide 10 can move linearly in the longitudinal direction of the guide rail 15, and includes a base 21 and two end caps 22, the end caps 22 are fastened to the two end faces of the base 21, and the two end faces are opposite to each other in the longitudinal direction of the guide rail 15.

[0076] In this example, the guide frame 20 of the profiled track guide 10 is supported on the guide rail 15 by a plurality of rolling elements WK. In this case, the rolling elements WK are arranged in a plurality of rolling element circulation channels formed on the guide frame 20, wherein the circulation channels extend along closed annular curves, respectively, and thus during the movement of the guide frame 20 along the longitudinal direction of the guide rail 15, the rolling elements WK circulate along closed annular circulation paths, wherein two portions of each of these closed annular circulation paths extend on the base 21 or pass through the base 21 along the longitudinal direction of the guide rail 15, respectively, and the other two portions of each of these closed annular paths extend through two end caps 22 ( Figure 5 The spatial distribution of these closed circulation paths of rolling elements WK is not shown in FIG.

[0077] exist Figure 5 In the example shown, the process of converting mechanical energy into electrical energy includes several key components: Mechanical energy is initially generated in linear motion devices, i.e. Figure 5 To this end, the guide frame 20 moves in the longitudinal direction of the guide rail 15 (such as Figure 5 This energy is then transferred to an "energy converter" EW, which corresponds to the system for generating electrical energy according to the present invention. The core of this energy converter EW is the arrangement of means for generating a static magnetic field, i.e., in this case, Figure 1-4 The permanent magnet PM shown is Figure 1-4 The induction coil IS shown is combined, wherein a voltage U is induced during the movement of the guide frame 20 in the longitudinal direction of the guide rail 15 ind The voltage U indThe generation of is based on the principle that when the rolling elements WK of the profiled track guide 10 move relative to the device PM for generating a static magnetic field, electrical energy is generated and in the process causes a change in the magnetic flux in the induction coil IS.

[0078] The induced voltage U ind Initially it must be rectified to make it usable for the electronics. This is achieved with the help of a rectifier GR, which converts the AC voltage into a DC voltage. The resulting DC voltage is then stored in the energy store ES. Different components, such as capacitors or batteries, can be used as energy store ES.

[0079] The stored energy is ultimately used to power different electronic components, such as a "DC / DC converter" GSW and a microprocessor MP which may be powered by the DC / DC converter GSW. Figure 5 The specific system in FIG. 1 includes components that can be used to acquire certain data, such as sensors S1 and S2. A wireless communication interface KS is also provided. The communication interface can be used to wirelessly transmit the data acquired by sensors S1 and S2 to other systems or devices. Sensors S1, S2 and the wireless communication interface KS can be as follows: Figure 5 The shown connection is to a microprocessor MP for data transmission.

[0080] exist Figure 5 In the example shown, the energy converter EW composed of the device PM for generating a static magnetic field and the induction coil IS can be, for example, fixedly arranged on the guide frame 20, so that the energy converter EW moves together with the guide frame 20 during the movement of the guide frame 20 along the guide rail 15. In this case, the energy converter EW can be installed near the circulation path of the rolling element WK, for example, on the base body 21 or in a recess formed in the base body 21, or on one of the end caps 22 or in a recess formed in one of the end caps 22 ( Figure 5 ). Therefore, Figure 5 The remaining electronic components shown (rectifier GR, energy storage device ES, DC / DC converter GSW, microprocessor MP, sensor S1 , sensor S2 , wireless communication interface KS) can each be arranged fixedly on the guide frame 20 or integrated into the guide frame 20 .

[0081] The energy converter EW can form a compact unit together with one or more of the above-mentioned electronic components (e.g. rectifier GR, energy storage ES, one or more sensors S1 and / or S2), wherein the compact unit can be installed, for example, on a single carrier or in a single housing. Such a unit can advantageously be installed as a whole near the circulation path of the rolling elements WK, for example, on the base body 21 or in a recess formed in the base body 21, or on one of the end caps 22 or in a recess formed in one of the end caps 22 ( Figure 5 not shown).

[0082] all in all, Figure 5 The energy conversion and utilization process in the specific technical system of the present invention is clearly outlined, and the goal of the system is to effectively convert the mechanical energy in the linear motion device into electrical energy and make this electrical energy available for different electronic applications.

[0083] Figures 6 to 9 Different views of a second embodiment of the system of the invention for generating electrical energy in a linear motion device are shown. These views are similar to Figures 1 to 4 The views in FIG. 1 show different perspectives and arrangements of rolling elements WK relative to the device MK1 for generating a static magnetic field.

[0084] The second embodiment is basically different from the first embodiment in that the permanent magnet PM is replaced by a magnetizing element. The magnetizing element is identified by the reference numeral MK1 and consists of a permanent magnet PM1 and two magnetic flux conducting components FLS1 and FLS2. The permanent magnet PM1 is a uniformly magnetized rectangular solid of hard magnetic material having different magnetic poles at opposite ends. The two magnetic flux conducting components FLS1 and FLS2 are composed of soft magnetic material having high relative magnetic permeability and high saturation magnetization, and are magnetized by the magnetic field generated by the permanent magnet PM1.

[0085] In this second embodiment, the rolling elements WK (in this case balls) are arranged such that during the movement of the movable device part (e.g. a guide frame or guide block) along the fixed device part (e.g. a guide rail), they have to pass through the spatial region RB between the two ends of the flux conducting parts FLS1 and FLS2. The arrangement of the permanent magnet PM1, the flux conducting parts FLS1 and FLS2 and the rolling elements WK is such that the magnetic field lines FL extend along a closed, substantially circular curve in the region of these parts.

[0086] Figure 6 and Figure 8 The second embodiment is shown from the same perspective, ie perpendicular to the direction of movement BR of the rolling element WK. Figure 6 Compared with the operating conditions shown in Figure 8In the operating state shown, the rolling element WK is deflected in the displacement direction BR by a distance which approximately corresponds to the radius of the rolling element WK.

[0087] Figure 7 Shows the Figure 6 Same rolling element arrangement, but with a direction extending perpendicular to the direction of movement BR Figure 6 The plane VII-VII in the figure is shown in top view. Fig. 9 The same rolling element arrangement as in Table 8 is shown, but with the same rolling element extending perpendicularly to the direction of movement BR. Figure 8 The form of a top view of the midplane IX-IX.

[0088] exist Figures 6 to 9 In the embodiment shown, the magnetic field lines FL inside the rolling element WK also extend substantially perpendicularly to the movement direction BR of the rolling element WK.

[0089] In this second embodiment, the induction coil IS is also arranged in the spatial region RB between the free end of one of the flux conducting parts FLS1 and the free end of the other flux conducting part FLS2. More precisely, the induction coil IS is located in the region between one end of the flux conducting part FLS1 and a spatial region between the ends of the two flux conducting parts FLS1 and FLS2 through which the rolling element WK passes in sequence when the movable device part moves along the fixed device part. The induction coil IS is similar to the first embodiment and consists of one or more coil windings extending annularly around the central axis of the induction coil IS, which is oriented substantially perpendicular to the movement direction BR of the rolling element WK.

[0090] exist Figure 6 and Figure 7 In the operating state shown, the arrangement of the rolling elements is realized so that the static magnetic field generated in the area between the second end of one flux conducting part FLS1 (facing away from the permanent magnet PM1) and the second end of the other flux conducting part FLS2 (facing away from the permanent magnet PM1) is concentrated on the volume of a single rolling element WK. As a result, the magnetic flux distributed to the coil winding of the induction coil IS is relatively high.

[0091] exist Figure 8 and Fig. 9 In the rolling element arrangement in the operating state shown, the distribution of the magnetic field lines FL is modified so that the static magnetic field generated in the area between the second end of one flux conducting component FLS1 (facing away from the permanent magnet PM1) and the second end of the other flux conducting component FLS2 (facing away from the permanent magnet PM1) is distributed over the volume of two consecutively arranged rolling elements WK. Figure 6 and Figure 7 Compared to the operating state shown, the magnetic flux of the coil winding assigned to the induction coil IS is significantly reduced.

[0092] Rolling element WK from Figure 6 and Figure 7 Arrangement to Figure 8 and Fig. 9 The arrangement position of will cause the magnetic flux change in the induction coil IS area, and vice versa. This change induces a voltage in the winding of the induction coil IS, wherein the voltage is represented by the symbol "~", which represents the AC voltage at the end of the induction coil IS winding.

[0093] In conclusion, Figures 6 to 9 The second embodiment shown differs from the first embodiment mainly by the addition of flux conducting components FLS1 and FLS2. These flux conducting components FLS1 and FLS2 allow a greater change in the magnetic flux, thereby generating a higher induced voltage U during the transition of the rolling element WK between the two arrangements. ind During the movement of the rolling element relative to the corresponding flux conducting component FLS1 or FLS2, eddy currents may be generated in one of the flux conducting components FLS1 and FLS2, which may cause energy losses. In order to reduce this energy loss as much as possible, it is advantageous that the flux conducting components FLS1 and FLS2 can be implemented in the form of laminated sheet packaging of soft magnetic material.

[0094] Advantageously, the soft magnetic material used for the flux conducting parts FLS1 and FLS2 is preferably a material having high relative magnetic permeability, low coercive field strength and high saturation magnetization (eg NiFe, SiFe or CoFe alloy).

[0095] Figures 10 to 13 Different views of a third embodiment of the system of the invention for generating electrical energy in a linear motion device are shown. Figures 6 to 9 The second embodiment shown is substantially similar. However, one significant difference can be seen in that a so-called pole shoe PS of soft magnetic material is formed on the second end (the second end facing away from the permanent magnet PM1 ) of one of the two flux conducting parts FLS1 located near the induction coil IS.

[0096] The pole piece PS makes it possible to purposefully change and control the magnetic field near the induction coil IS. The main purpose of this change and control is to increase the electrical energy generated by the movement of the movable device part of the linear motion device. In other words, the efficiency of converting the mechanical energy of the movable device part into electrical energy is maximized.

[0097] To achieve this, the shape of the pole shoe PS and the magnetic permeability of the pole shoe material used should be carefully selected. The geometry of the pole shoe PS can be configured specifically according to the geometry of the rolling elements WK (eg balls or rollers) and the arrangement of the coil windings of the induction coil IS.

[0098] In order to ensure that the mechanical energy of the linear motion device is converted into the generated electrical energy to the maximum extent possible, it is necessary to optimize the magnetic field around the induction coil IS through the pole shoe PS so that the magnetic flux distributed to the coil winding of the induction coil IS is on the one hand Fig.10 and 11 is maximum in the arrangement shown, while on the other hand, the magnetic flux Fig.12 and 13 The arrangement of rolling elements WK shown is the smallest.

[0099] Figures 10 to 13 The special design of the third embodiment shown enables this optimization. The pole shoe PS has a convex surface, i.e. a surface that is curved outwards, on its side facing the induction coil IS. Furthermore, the pole shoe PS is arranged symmetrically with respect to the extension of the center axis of the induction coil IS. The center axis is defined as a line extending perpendicularly through the center of the surface defined by the coil windings of the induction coil IS.

[0100] Due to the special design of the pole shoe PS, the magnetic flux in the rolling element WK is controlled to Fig.12 and 13 The rolling element arrangement is particularly low, wherein this can also be attributed to the convex curvature of the pole shoe PS.

[0101] As a result of this optimization, the rolling element WK Fig.10 and Fig.11 in and Fig.12 and Fig.13 During the movement between the positions shown in , the magnetic flux changes significantly. This generates a high induced voltage U ind .

[0102] Fig.14 and 15 A fourth embodiment of the system of the invention for generating electrical energy in a linear motion device is shown, wherein the figures show two different arrangements of the rolling element WK relative to the devices MK2, MK3 for generating a static magnetic field in the form of a sectional side view, wherein the sectional side view corresponds to a section extending parallel to the movement direction BR of the rolling element WK.

[0103] The device for generating a magnetic field used in this embodiment comprises two identical and substantially U-shaped magnetizing elements MK2 and MK3. Each of these magnetizing elements MK2 and MK3 comprises a permanent magnet PM2 and an L-shaped magnetic flux conducting part FLS3 of soft magnetic material. The magnetic flux conducting part FLS3 is connected to the end face of the permanent magnet PM2 at one end and is thus magnetized by the permanent magnet PM2. The opposite end of the magnetic flux conducting part FLS3 forms the second leg of the U-shaped magnetizing elements MK2 and MK3.

[0104] The two magnetized elements MK2 and MK3 are arranged at a distance from each other on opposite sides of a spatial region RB, and when a movable device component (such as a guide frame or a guide block) moves in the longitudinal direction of another device component (such as a guide rail), the rolling element WK continuously passes through the spatial region in the moving direction BR. The magnetized elements MK2 and MK3 are spaced a distance from each other and are mirror-inverted relative to the moving direction BR of the rolling element WK, such as Fig.14 and 15 In this case, the rolling element WK is realized in the form of a roller, Fig.14 and 15 A side view parallel to the longitudinal axis of the rollers is shown in each case.

[0105] The two magnetized elements MK2 and MK3 extend in the movement direction BR of the rolling element WK and have an extent which substantially corresponds to the diameter of the rolling element WK relative to the movement direction BR.

[0106] Fig.14 An operating state is shown in which the rolling elements WK are arranged along the moving direction BR so that one of the two rolling elements WK arranged in sequence is located in the intermediate space between the permanent magnets PM2 of the magnetic elements MK2 and MK3. The other of the two rolling elements WK arranged in sequence is simultaneously located in the intermediate space between the end of the second leg of the magnetizing element MK2 formed by the magnetic flux conducting part FLS3 and the end of the second leg of the magnetizing element MK3 also formed by the magnetic flux conducting part FLS3.

[0107] With Fig.14 Compared with the layout in the running state, Fig.15 The rolling element WK in the operating state is offset in the moving direction BR by approximately half of the rolling element diameter.

[0108] In any case, the two magnetized elements MK2 and MK3 are arranged at a certain distance from each other and are mirror-symmetrical with respect to the moving direction BR of the rolling element WK, and their permanent magnets PM2 are aligned so that the magnetization direction of the permanent magnets PM2 of the two magnetized elements MK2 and MK3 is perpendicular to the moving direction BR of the rolling element WK. In this case, the magnetization directions of the permanent magnets PM2 of one magnetized element MK2 and the permanent magnets PM2 of the other magnetized element MK3 are opposite, wherein, Figures 14 to 19 The polarity in the chart is represented by "S" for the South Pole and "N" for the North Pole. Therefore, the two magnetized elements MK2 and MK3 generate a magnetic field in the spatial region BR, which is Figures 1 to 13 Compared with the above-mentioned embodiment, the magnetic field lines FL (given by Fig.13 and 14The dotted line in FIG. 1 extends at least partially parallel to the movement direction BR of the rolling element WK, wherein the rolling element WK must continuously pass through the spatial region BR during the movement of the movable device part of the linear motion device along the longitudinal direction of another device part of the linear motion device.

[0109] exist Fig.14 In the rolling element arrangement of , the rolling element WK between the magnetized elements MK2 and MK3 is relatively strongly magnetized because they are located exactly in the intermediate space between the permanent magnets PM2 and between the free legs of the magnetized flux conducting parts FLS1 and FLS2. This makes the magnetic flux density in the space between the two magnetized elements MK2 and MK3 relatively high, as shown in FIG. Fig.14 shown.

[0110] On the other hand, Fig.15 In the operating state shown, the rolling elements WK are arranged so that the permanent magnets PM2 of the magnetizing elements MK2 and MK3 and the free legs of the flux conducting parts FLS1 and FLS2 of the magnetizing elements MK3 and MK2 are in a "middle position" between two rolling elements WK arranged in sequence. In this arrangement, the magnetic field generated by the permanent magnets PM2 and transmitted by the flux conducting parts FLS1 and FLS2 is substantially distributed over the two rolling elements WK arranged in sequence and their surroundings.

[0111] In both rolling element arrangements, therefore, the two magnetized elements MK2 and MK3 generate a magnetic field, the magnetic field lines FL of which extend at least partially parallel to the movement direction BR of the rolling element WK.

[0112] Fig.14 and 15 The dotted line in the figure shows that Fig.14 The layout transitions to Fig.15 During the arrangement of the rolling element WK, the position change of the rolling element WK causes a change in the spatial distribution of the magnetic field lines FL relative to the magnetizing elements MK2 and MK3 and the arrangement of the induction coil IS2, thereby causing a change in the magnetic flux. This causes a voltage U to be induced in the induction coil IS2. ind , wherein the central axis of the induction coil IS2 extends colinearly with the moving direction BR of the rolling element WK. Therefore, the coil winding of the induction coil IS2 extends in a ring shape around the space region RB that the rolling element WK must pass through in sequence, such as Fig.14 and 15 The coil windings of the induction coil IS2 are arranged in a space-saving manner between two legs of the U-shaped magnetized elements MK2 and MK3 (ie between the legs formed by the permanent magnet PM2 and the legs formed by the flux conducting parts FLS2 and FLS3, respectively).

[0113] Figures 16 to 19 A detailed description of two further variants of the system of the invention for generating electrical energy in a linear motion device is shown, which are based on Fig.14 and 15 These other variations are referred to herein as the fifth embodiment ( Fig.16 and 17 ) and the sixth embodiment (see Fig.18 and 19 ).

[0114] exist Fig.16 and 17 In the fifth embodiment shown, other structural changes are made to the components MK2, MK3 for generating a static magnetic field. Fig.14 and 15 In the embodiment shown, two magnetizing elements MK2 and MK3 consisting of an L-shaped flux conducting member FLS3 and a permanent magnet PM2 are used, and in Fig.16 and 17 In the fifth embodiment shown, the design of these magnetizing elements MK2 and MK3 is changed. These figures show two magnetizing elements MK2 and MK3 of the same design in the form of a sectional side view, which corresponds to a section extending parallel to the moving direction BR of the rolling element WK, wherein the magnetizing elements MK2 and MK3 respectively have an E-shaped profile, which has a total of three legs spaced apart in the moving direction BR. The central legs of these E-shaped magnetizing elements MK2 and MK3 are formed by the permanent magnet PM2 on the side facing the spatial region RB through which the rolling element WK passes. The rest of the magnetizing elements MK2 and MK3 are respectively formed by flux conducting parts FLS2, FLS3 having an E-shaped profile, wherein the length of the central legs of the flux conducting parts FLS2, FLS3 are respectively shortened in a direction perpendicular to the moving direction BR by a length corresponding to the length of the attached permanent magnet PM2.

[0115] and Fig.14 and 15 Compared to the fifth embodiment, another significant difference is the arrangement and number of induction coils. In the fifth embodiment, two separate induction coils IS1 and IS2 are used instead of Fig.14 and 15 The two induction coils IS1 and IS2 are arranged one behind the other in the moving direction BR of the rolling element WK and are spaced apart from each other so that they are located on opposite sides of the permanent magnet PM2 attached to the center leg.

[0116] The magnetic field lines FL of the magnetic field generated by the magnetizing elements MK2 and MK3 are Fig.16 and 17In the region of the induction coil IS1, the direction of the generated magnetic field is obviously substantially parallel to the longitudinal axis of the induction coil IS1 (or perpendicular to the surface defined by the coil windings of the induction coil IS1). Therefore, the direction of the generated magnetic field is substantially parallel to the longitudinal axis of the induction coil IS2 (or perpendicular to the surface defined by the coil windings of the induction coil IS2) in the region of the induction coil IS2.

[0117] In from Fig.16 The layout transitions to Fig.17 During the arrangement process, the position change of the rolling element WK causes the spatial distribution of the magnetic field lines FL relative to the magnetizing elements MK2 and MK3 and the induction coils IS1 and IS2 to change, thereby causing the magnetic flux in the induction coil IS1 area and the induction coil IS2 area to change. Furthermore, due to the change in the magnetic flux in the induction coil IS1 area and the induction coil IS2 area, voltages are induced in each coil winding of the induction coil IS1 and each winding of the induction coil IS2.

[0118] In the fifth embodiment, the structure of the magnetizing elements MK2 and MK3 and the arrangement and number of the induction coils IS1 and IS2 are significantly changed. These changes are intended to optimize the functionality of the system. The particularity of these changes is that the induction coils IS1 and IS2 are arranged around both sides of the central permanent magnet PM2. This makes it possible to detect different polarities in the static magnetic field affected by the rolling element WK. This allows more accurate and differentiated measurements to be obtained, because the influence of the rolling element WK on the magnetic field is determined from different directions. Therefore, the fifth embodiment aims to increase the sensitivity and accuracy of the system to the interaction between the rolling element WK and the magnetic field.

[0119] Fig.18 and 19 The sixth embodiment of the present invention is also structurally based on Fig.14 and 15 The fourth embodiment is based on the embodiment of FIG. However, in this case, an additional measure is taken to further improve the performance. On the permanent magnet PM2 of the magnetizing elements MK2 and MK3, a magnetic field concentrator MKO made of a soft magnetic material with high relative magnetic permeability is arranged on the side facing the space through which the rolling element WK passes. The magnetic field concentrator MKO has the function of concentrating the magnetic field on the smallest possible space near the corresponding rolling element WK.

[0120] This improvement can be used to increase the magnetic field strength near each rolling element WK, which in turn can improve the efficiency of energy generation. The stronger the magnetic field strength near the corresponding rolling element WK, the greater the change in magnetic flux during the movement of the rolling element WK. This in turn makes the induced voltage U in the induction coil IS2 ind Higher, thus improving the efficiency of energy generation.

[0121] Therefore, the sixth embodiment aims to improve the performance of the system by using magnetic field concentrators MKO. These magnetic field concentrators MKO will concentrate the magnetic field closer to the rolling elements WK in order to better detect changes in the magnetic flux.

[0122] The proposed system can be used in particular as an innovative approach for operating and monitoring guide frames in profiled rail guides. Since the proposed system ("energy harvester") is directly integrated into the guide frame, potential challenges in terms of power supply and wiring can be avoided.

[0123] The main advantage of this system is that it enables the guide frame to operate in a self-sufficient manner. The energy generated is used to operate the sensor system, which acquires important data such as the amount and / or state of lubricant used to lubricate the rolling elements, the humidity and / or temperature around the rolling elements, and the wireless data transmission device. This eliminates the need for an external power supply, which is very advantageous in many industrial applications, especially in areas where wiring is problematic or expensive.

[0124] A significant advantage of the proposed system is that it provides a self-sufficient energy supply option for wireless data transmission. Although WLAN and Bluetooth are mature protocols, it is important to always ensure the reliability and security of these connections in industrial environments, where failures or other challenges may occur.

[0125] The use of a rectifier GR and an energy storage device ES ensures that the generated energy is used and stored efficiently. This ensures that the sensor system and the data transmission device can continuously obtain the required energy.

[0126] In summary, the proposed combination of energy generation systems, sensor technology and wireless data transmission in linear motion devices (such as profiled guides or ball screws) has the potential to revolutionize the way linear motion devices are used and monitored. Not only does it provide a self-sufficient energy source, it also improves monitoring and data transmission, helping to optimize operation and detect problems early.

Claims

1. A system for generating electrical energy in a linear motion device (10), the linear motion device having a first device part (15) and a second device part (20), wherein: The second device part (20) is supported on the first device part (15) via a rolling element (WK), so that the second device part (20) is configured to be linearly movable relative to the first device part (15), and when the second device part moves relative to the first device part during operation of the linear motion device (10), the rolling element (WK) moves relative to the first device part and the second device part, wherein the system for generating electrical energy comprises: the rolling element (WK) being configured to be movable along a movement direction (BR) during operation of the linear motion device; means (PM, MK1, MK2, MK3) for generating a static magnetic field in a spatial region (RB) through which the rolling element (WK) must continuously pass while moving in a movement direction (BR) during operation of the linear motion device, wherein the rolling element (WK) consists of a magnetically conductive material such that the rolling element (WP) is suitable for influencing the magnetic field depending on the position of the rolling element (WK) in this spatial region (RB); and at least one induction coil (IS, IS1, IS2) having at least one coil winding, wherein the at least one induction coil (IS, IS1, IS2) is arranged fixedly relative to the means (PM, MK1, MK2, MK3) for generating a static magnetic field, so that during a movement of the rolling element (WK) through the spatial region (RB) in the movement direction (BR), the induction coil experiences a change in magnetic flux due to a change in the position of the rolling element (WK), thereby inducing a voltage (U) in the at least one coil winding. ind ).

2. The system according to claim 1, wherein: The rolling element (WK) moves along a closed path in a cyclic manner; alternatively, the rolling element (WK) moves along a fixed path and returns to its starting position at one end.

3. The system according to claim 1 or 2, wherein: The rolling elements (WK) are realized in the form of balls or rollers.

4. A system according to any one of the preceding claims 1 to 3, wherein: The device for generating a static magnetic field (PM, MK1, MK2, MK3) is formed by a permanent magnet (PM) of a hard magnetic material.

5. The system according to claim 4, wherein: The permanent magnet (PM) is basically implemented in a U-shaped manner, wherein its two ends have different magnetic polarities and the space between the two ends is penetrated by the magnetic field lines (FL) of the static magnetic field, and it is designed to be passed through by the rolling element (WK) during the operation of the linear motion device (10).

6. A system according to any one of the preceding claims 1 to 3, wherein: The device for generating a static magnetic field is formed by a magnetizing element (MK1), which comprises: A permanent magnet (PM1) of hard magnetic material having different magnetic polarities at its two ends; and Two flux conducting components (FLS1, FLS2), wherein a first end of a first flux conducting component (FLS1) is connected to one end of a permanent magnet (PM1), and a first end of a second flux conducting component (FLS2) is connected to an opposite end of the permanent magnet (PM1).

7. The system according to claim 6, wherein: The two flux conducting parts ( FLS1 , FLS2 ) consist of a soft magnetic material with a high relative magnetic permeability.

8. The system according to claim 6 or 7, wherein: The magnetizing element (MK1) is substantially realized in a U-shaped manner, and a space between a second end of one magnetic flux conducting component (FLS1) and a second end of the other magnetic flux conducting component (FLS2) is penetrated by magnetic field lines (FL) of the static magnetic field and is designed to be passed through by the rolling element (WK) during operation of the linear motion device.

9. The system according to claim 8, wherein: The magnetic field lines (FL) extend in the region of the permanent magnet (PM1), the two flux conducting components (FLS1, FLS2) and the rolling elements (WK) along a closed, substantially circular curve.

10. The system according to claim 8 or 9, wherein: The flux conducting components (FLS1, FLS2) are designed and arranged such that the spatial distribution of the magnetic field lines (FL) varies as the respective positions of the rolling elements (WK) relative to the flux conducting components (FLS2, FLS1) vary.

11. A system according to any one of the preceding claims 8 to 10, wherein: A pole shoe (PS) of soft magnetic material is arranged on a second end of at least one of the two flux conducting parts (FLS1, FLS2), wherein the second end is adjacent to the at least one induction coil (IS) to optimize the spatial distribution of the magnetic field lines (FL) around the at least one induction coil (IS).

12. The system according to claim 11, wherein: The geometry of the pole piece and the relative magnetic permeability of the pole piece material are optimized to ensure maximum conversion of the mechanical energy of the linear motion device into generated electrical energy.

13. The system according to claim 11 or 12, wherein: The pole shoe geometry is realized as a function of the geometry of the rolling element (WK) and the arrangement of at least one winding of the induction coil (IS).

14. A system according to any one of the preceding claims 11 to 13, wherein: The pole piece (PS) has a convex curved surface on a side facing the at least one induction coil (IS).

15. A system according to any one of the preceding claims 11 to 14, wherein: The pole piece (PS) is realized symmetrically with respect to a center axis of the induction coil (IS).

16. A system according to any one of the preceding claims 5 and 8 to 15, wherein: The magnetic field lines (FL) extend substantially perpendicularly to a movement direction (BR) of the rolling elements (WK).

17. A system according to any one of the preceding claims 1 to 16, wherein: The at least one induction coil (IS) is arranged in or on the spatial region (RB) through which the rolling element (WK) continuously passes while moving along the movement direction (BR) during operation of the linear motion device.

18. A system according to any one of the preceding claims 1 to 17, wherein: The at least one induction coil (IS) has one or more coil windings which extend annularly around a central axis of the induction coil (IS).

19. The system of claim 18, wherein: One or more coil windings of the at least one induction coil (IS) each surround a surface area which is aligned substantially parallel to the movement direction (BR) of the rolling element (WK).

20. The system according to any one of the preceding claims 1 to 3, wherein: The device for generating a static magnetic field comprises two U-shaped magnetized elements (MK2, MK3), each of which comprises a permanent magnet (PM2) and an L-shaped magnetic flux conducting component (FLS3). The two U-shaped magnetized elements (MK2, MK3) are arranged at a certain distance from each other and are mirror-symmetrical with respect to the moving direction (BR) of the rolling element (WK), wherein during the operation of the linear motion device, the rolling element (WK) continuously passes through a spatial region (RB) between the two magnetized elements (MK2, MK3) penetrated by magnetic field lines (FL) of the static magnetic field.

21. The system of claim 20, wherein: The extent of the magnetized elements (MK2, MK3) in the movement direction (BR) corresponds approximately to the diameter of the rolling element (WK).

22. The system according to claim 20 or 21, wherein: A rolling element (WK) is arranged between the ends of the flux conducting parts (FLS3) of the two magnetized elements (MK2, MK3) after or before the rolling element (WK) between the two permanent magnets (PM2).

23. A system according to any one of the preceding claims 20 to 22, wherein: The at least one induction coil (IS2) is arranged such that at least one coil winding of the at least one induction coil (IS2) extends in a ring shape around the spatial region (RB) that is sequentially passed through by the rolling elements (WK).

24. The system of claim 23, wherein: The at least one induction coil (IS2) is arranged so that at least one coil winding of the at least one induction coil (IS2) extends through an intermediate space between the permanent magnet (PM2) and a magnetic flux conducting component (FLS3) of one of the magnetizing elements (MK2), and through an intermediate space between the permanent magnet (PM2) and a magnetic flux conducting component (FLS2) of the other magnetizing element (MK3), respectively.

25. A system according to any one of the preceding claims 1 to 3, wherein: The device for generating a static magnetic field comprises two magnetized elements (MK2, MK3) of identical design having an E-shaped profile, the magnetized elements being arranged at a certain distance from each other and being mirror-symmetrical with respect to the moving direction (BR) of a rolling element (WK), wherein the E-shaped profile has three legs, a permanent magnet (PM2) is arranged on the middle leg, and during operation of the linear motion device, the rolling element (WK) continuously passes through a spatial region (RB) between the two magnetized elements (MK2, MK3) penetrated by magnetic lines of force (FL) of the static magnetic field.

26. The system of claim 25, wherein: Viewed from the moving direction (BR) of the rolling element (WK), two induction coils (IS1, IS2) are arranged one behind the other on opposite sides of the permanent magnet (PM2), and at least one coil winding of the two induction coils respectively extends in a ring around a spatial region (RB) continuously passed through by the rolling element (WK).

27. The system of claim 26, wherein: The two induction coils (IS1, IS2) are arranged in such a way that they respectively detect different polarities of a static magnetic field influenced by the rolling element (WK).

28. A system according to any one of the preceding claims 20 to 27, wherein: The magnetic field lines (FL) extend partially parallel to the movement direction (BR) of the rolling elements (WK).

29. A system according to any one of the preceding claims 20 to 28, wherein: A magnetic field concentrator (MKO) of a soft magnetic material with high relative magnetic permeability is arranged on the permanent magnet (PM2) of one magnetizing element (MK2) and / or the permanent magnet (PM2) of the other magnetizing element (MK3) in order to concentrate the magnetic field on the smallest possible space near the rolling element (WK).

30. A system according to any one of the preceding claims 1 to 29, wherein: The system further comprises a rectifier (GR) for converting the voltage (U) induced in the at least one induction coil (IS) into a ind ) is converted into a DC voltage.

31. A system according to any one of the preceding claims 1 to 30, wherein: An energy store (ES) is also included for storing and further using the generated electrical energy, wherein the energy store is selected from the group consisting of capacitors and batteries.

32. A system according to any one of the preceding claims 1 to 31, wherein: The system is designed to supply the generated electrical energy to electrical components on the first device part (15) or the second device part (20) of the linear motion device (10).

33. The system of claim 32, wherein: The electrical component comprises at least one sensor (S1, S2).

34. A system according to claim 32 or 33, wherein: The electrical component comprises at least one wireless communication interface (KS) for transmitting data.

35. A linear motion device (10) having a first device component (15) and a second device component (20), wherein: The second device part (20) is supported on the first device component (15) via rolling elements (WK) so that the second device part (20) is configured to be linearly movable relative to the first device part (15), wherein the linear motion device comprises at least one system as claimed in any one of claims 1 to 34, and the device for generating a static magnetic field and the at least one induction coil are fixedly arranged on the first device part or fixedly arranged on the second device part.

36. The linear motion device of claim 35, wherein: The linear motion device is realized in the form of a profiled rail guide (10), wherein the profiled rail guide has a guide rail as the first device component (15) and a guide frame or a guide block as the second device component (20).

37. The linear motion device of claim 35, wherein: The linear motion device is realized in the form of a ball screw, wherein the ball screw has a spindle as the first device component and a spindle nut as the second device component, wherein the device for generating a static magnetic field is fixedly arranged on the spindle nut.

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