阅读说明：本技术 带有能量产生装置的直线运动装置 (Linear motion device with energy generating device ) 是由 L.兰贝雷基 M.舍伦贝格 R.艾伦普佛特 于 2019-06-19 设计创作，主要内容包括：本发明涉及一种直线运动装置,该直线运动装置具有导引构件和在该导引构件上导引的并且能运动的导引组件,能量产生装置(6；36；70)固定在该导引组件上。这个能量产生装置具有发电机(14；40；76),该发电机由摩擦轮(12；34；44；74；86；96)被驱动。摩擦轮(12；34；44；74；86；96)贴靠在导引构件上用于滚动并且在导引组件运动时被旋转地驱动。(The invention relates to a linear motion device having a guide member and a movable guide assembly guided on the guide member, to which an energy generating device (6; 36; 70) is fastened. The energy generating device has an electric generator (14; 40; 76) which is driven by the friction wheel (12; 34; 44; 74; 86; 96). A friction wheel (12; 34; 44; 74; 86; 96) bears against the guide member for rolling and is rotationally driven when the guide assembly moves.)

1. A linear movement device has a guide member, a guide assembly guided by the guide member and movable, and an energy generating device (6; 36; 70) arranged on the guide assembly, wherein the energy generating device (6; 36; 70) has a generator (14; 40; 76) which can be driven by a friction wheel (12; 34; 44; 74; 86; 96) which bears against the guide member for rolling and is driven in rotation when the guide assembly is moved.

2. Linear motion device according to claim 1, wherein the energy generating device (6; 36; 70) comprises at least one electronic circuit and/or at least one energy accumulator.

3. The linear motion device according to any one of claims 1 or 2, wherein the energy generating device (6; 36; 70) is configured to supply an electric current to a sensor system of the linear motion device.

4. The linear motion device according to one of claims 1 to 3, wherein the linear motion device has an evaluation unit which receives information from the sensor system and/or the energy generating device (6; 36; 70), and detects one or more actual information and determines therefrom at least one part of the driving profile and compares the driving profile with one or more stored driving profile patterns and determines therefrom a current driving profile pattern.

5. Linear motion device according to one of claims 1 to 4, wherein the energy generating device (6; 36; 70) has at least one elastic element which loads the friction wheel (12; 34; 44; 74; 86; 96) of the energy generating device (6; 36; 70) towards the guide member with a force which presses the friction wheel (12; 34; 44; 74; 86; 96) towards the guide member.

6. Linear motion device according to any of claims 1 to 5, wherein the energy generating device (6; 36; 70) has a transmission for connecting the friction wheel (12; 34; 44; 74; 86; 96) with the generator (14; 40; 76).

7. The linear motion device according to any one of claims 1 to 6, wherein the energy generating device (6; 36; 70) has a housing (8; 54; 56; 58; 60) which is arranged on the end side of the guide assembly which is directed in the longitudinal direction.

8. Linear motion device according to claims 1 to 7, wherein the housing (8; 54; 56; 58; 60) does not protrude beyond the guide member perpendicular to the direction of movement of the guide member.

9. Linear motion device according to one of claims 1 to 8, wherein the friction wheel (12; 34; 44; 74; 86; 96) has a raceway (20; 32) which bears against a guide member, the raceway being arranged next to one or more rolling surfaces (18; 30) of the rolling bodies of the guide assembly.

10. The linear motion device according to any one of claims 1 to 9, wherein the linear motion device is a spindle guide (1) having a spindle (2) as a guide member and a spindle nut (4) as a guide assembly, or wherein the linear motion device is a profile rail guide having a profile rail (26) as a guide member and a guide carriage as a guide assembly.

11. Linear motion device according to claim 10, wherein the housing (8; 54; 56; 58; 60) of the energy generating device (6; 36; 70) is fixed to the spindle nut (4) and is designed in a U-shape and/or overlaps the spindle (2).

12. Linear motion device according to claim 10 or 11, wherein the axis of rotation of the friction wheel (12; 34; 44; 74; 86; 96) is curved with respect to the axis of rotation of the spindle (2).

13. Linear motion device according to claim 12, wherein the plane of rotation of the friction wheel (12; 34; 44; 74; 86; 96) is adjusted with respect to the axis of rotation of the spindle (2) by an adjustment angle corresponding to the angle of rise of the pitch of the spindle (2).

14. The linear motion device as claimed in claim 10, wherein the housing (8; 54; 56; 58; 60) of the energy generating device (6; 36; 70) is arranged on the profile rail (26), is designed in a U-shape, overlaps the profile rail (26) and engages in a profile recess (28) of the profile rail (26).

15. Linear motion device according to claim 14, wherein the housing (8; 54; 56; 58; 60) is formed by at least two housing parts which can be separated in such a way that the housing (8; 54; 56; 58; 60) can be mounted on the profile rail (26) and/or the housing (8; 54; 56; 58; 60) is at least partially designed in such a way that it can be elastically deformed during mounting and at least one elastically deformable housing arm (50) can be pivoted away from the other housing arm (50).

Technical Field

The invention relates to a linear motion device with an energy generating device according to the preamble of claim 1.

Background

Linear motion devices are known from the prior art, which are equipped with an energy generating device. The linear motion device comprises a guide member on which a movable guide assembly is arranged. For supplying loads, for example sensors, with electrical energy, an energy generating device can be integrated into the linear motion device.

DE 19959979 a1 discloses a linear motion device with a spindle guide with a spindle as a guide element, in which a friction wheel is mounted on the spindle. The friction wheel is arranged in a stationary manner and rests against the spindle in a region, namely on one of the outer ends of the spindle. The friction wheel is connected to a generator, which is arranged outside the main shaft guide. This arrangement is disadvantageous in order to supply energy to a load mounted on a movable guide assembly in the form of a spindle nut, since a trailing cable is required for supplying current to the load. The trailing cable furthermore requires additional installation space and is furthermore prone to wear and is therefore costly.

Disclosure of Invention

In contrast, the object of the invention is to create a linear motion device with an energy generating device, which generates electrical power in a technically simple and cost-effective manner.

This object is achieved according to the features of claim 1.

Advantageous embodiments of the invention are the subject matter of the dependent claims.

According to the invention, the linear motion device comprises: a guide member, such as a spindle of a spindle rail guide or a profile rail of a profile rail guide; a guide assembly, such as a spindle nut or a guide carriage, movable on a guide member; and an energy generating device. The energy generating device is arranged on the guide assembly and has a generator which is driven by the friction wheel and which generates electrical energy when the friction wheel is in rotational motion. The friction wheel bears against the guide member and is set in rotation by the movement of the guide assembly.

In the present invention, it is advantageous if the electrical energy generated by the generator can be supplied to a load arranged on the guide assembly and/or the energy generating device and therefore does not have to be supplied either via a trailing cable or via a battery. The life cycle costs are therefore reduced, since the energy generating device is as maintenance-free as possible. The integration of the energy generating device on the guide carriage also makes it possible to use the linear motion device in a smaller installation space and less susceptible to disturbances. Furthermore, it is advantageous that energy is generated in each movement of the guide assembly, for example also during very slow driving or at constant speed, and the energy supply is therefore as far as possible independent of the driving profile (fahrprofile) of the guide assembly.

Advantageously, the energy generating device comprises a circuit for providing a constant supply voltage to the load and/or for load matching of the supply voltage.

Furthermore, the energy generating device preferably has an energy store, for example an accumulator. The accumulator should advantageously be charged with the energy generated by the energy generating device, which cannot be used directly by the load for performing the function. In other words, the accumulator is fed with the temporarily excess energy of the generator. A function of the load can therefore be performed when the load requires more energy than is provided by the energy generating device at this point in time, and/or a function can also be used when the guide assembly is not moving and the energy generating device therefore does not generate energy at this point in time.

The energy generating device is preferably provided for supplying a sensor system, for example a microphone and/or a structure-borne sound sensor (korpers) and/or an acceleration sensor, with an electric current. By integrating such a sensor device, it is possible, for example, to detect operating noise (laufgerasche) and/or machine vibrations and thus to monitor the wear of the linear motion device and/or of the individual components.

It is also advantageous if the linear motion device has an evaluation unit. The evaluation unit can exchange information with the sensor system and/or the energy generating device. By detecting the course of the useful energy signal (nutzenergisignals) of the energy generating device (to which the voltage course and/or the frequency and/or the signal shape of the generated voltage of the generator, for example, belongs), the evaluation unit can derive information or states, such as the speed of the guidance means, for example. Furthermore, the monitoring of the state of the linear motion device and/or of the friction wheel can be carried out by recording and/or evaluating the useful energy signal. For this purpose, the slip between the friction wheel and the guide element is estimated from the useful energy signal (Schlupf) and, for example, wear of the friction wheel and/or the lubrication state of the linear motion device and/or contamination of the raceways of the rolling bodies of the linear motion device is detected therefrom (verschmutzeng). The evaluation unit is arranged, for example, in the guide assembly. Alternatively or additionally, an external evaluation unit can be provided, which communicates with the sensor system and/or the energy generating device, for example by radio.

By correlating the information of the sensor system and of the energy generating device, in particular via the evaluation unit, further advantageous recognition can also be achieved. For example, vibrations at specific speeds are recorded, which are also referred to in the generic term as eigenmodes (eigenmodes) which are dependent on the driving speed and can be used to identify wear or disturbances in advance.

In a further advantageous embodiment of the invention, the sensor system is active, the guide assembly is in motion and preferably also inactive or substantially inactive, i.e. no movement of the guide assembly takes place. The sampling rate, which determines the time interval between measurements of the sensor system, may alternatively or additionally be matched to the movement of the guide assembly. The evaluation unit can thus control the activity (Aktivitat) of the sensor system as a function of the active energy signal. In the case of a faster movement of the guide assembly, for example, the time interval between the measurements can be shortened and the time interval between the measurements can be lengthened during a creep travel. Energy can thus be saved, since the measurement by the sensor system is not carried out continuously, but on demand.

In a further embodiment of the invention, it is possible to determine (ermiteln) a driving profile pattern (fahrprofilemulter) or a section of a driving profile pattern. The driving profile or a section describes, for example, the movement of the guide assembly and/or the available energy signal and/or the charging of the energy store and/or the energy consumption of the sensor system over a period of time. The current driving contour pattern or a section is preferably compared with one or more driving contour patterns which can be stored in a database, for example, integrated in the evaluation unit and/or on a server, which can be called up by means of a data transmission, for example, wirelessly. If the current driving contour pattern or a section completely or also only partially corresponds to one or more stored driving contour patterns, the prediction of how the driving contour pattern looks for the future (vorausagen) can be set by the evaluation unit, in particular. The stored driving contour pattern closest to the current driving contour can thus be used for the prediction, for example. The functions of the sensor system and/or of the evaluation unit which require a lot of energy and which call for the maximum power of the energy generating device and/or of the energy store, for example, can be controlled in time by transmitting information by radio, in such a way that no further functions are affected and/or planning is carried out at the point in time when a sufficient power is provided by an energy generating device. For example, an energy store can be used which has a smaller capacity and therefore also requires less installation space and is also more cost-effective.

In order to ensure contact of the friction wheel with the guide member, the energy generating device is preferably equipped with a spring and/or elastic element, such as a helical spring and/or a helical torsion spring (schenkelfoder) and/or a spiral spring (Spiralfeder) and/or a ball spring (Kugelfeder) and/or an involute spring (evolufeder) and/or a disk spring pack. The friction wheel can be loaded with a force in the direction of the guide member by means of a spring. It is also conceivable for the friction wheel to be designed elastically as a spring. The spring preferably has a flat stiffness characteristic, so that, for example, in the event of wear of the friction wheel, which for example leads to a relaxation of the spring, and/or even in the event of a mechanical readjustment of the spring for compensating for wear, no excessively small or excessive pressing force of the friction wheel onto the guide member is generated by the spring. A further advantage of the integration of the spring into the energy generating device is that the unevenness of the raceway of the friction wheel is compensated and thus a permanent contact between the friction wheel and the guide member can be ensured. The spring is preferably supported on the guide member.

In a further embodiment of the invention, the energy generating device has a connection between the friction wheel and the generator, such as a transmission, it being possible for the friction wheel and the generator to be fastened to a common shaft, which can be realized particularly cost-effectively, a further embodiment provides that the transmission creates a connection between the friction wheel and the generator, different implementation possibilities, such as a spur gear transmission (Stirnradgetriebe) and/or a bevel gear transmission (Kegelradgetriebe) and/or a worm gear transmission (scheckegriebe) and/or a belt transmission (riegetriebe) can be taken into account, the advantage of using the transmission is that the friction wheel and the generator are decoupled with respect to their mounting and the bearing of the generator is therefore not loaded by the pressure of the friction wheel and thus a long life of the generator can be ensured (langlebigkekek) and furthermore the spur gear transmission, for example, enables the drive shaft of the friction wheel to be moved in the direction of the mounting surface of the friction wheel on the guiding element, while the bearing of the generator is thus not loaded by the friction wheel and thus a longer life of the friction wheel (langleberg) and thus a more compact running speed of the generator can be achieved by the friction wheel, in particular by the friction wheel being able to be a more compact arrangement of the friction wheel, thus enabling the friction wheel to be able to be moved in the generator by the friction wheel to be moved in the friction wheel to be able to be moved in the friction wheel to be moved in the direction of the friction wheel (masscause of the generator) and thus to be moved in the generator in the friction wheel, thus a more compact manner of the friction wheel, the generator, thus a more compact manner of the friction wheel, thus being able to be.

The drive shaft of the generator and/or of the friction wheel is preferably supported via at least one or preferably at least two bearings, respectively. The independent mounting of the drive shaft of the friction wheel and/or of the generator by means of one or more bearings has the advantage that the decoupling of the drive wheels of the friction wheel and of the generator is followed and therefore a load removal of the shaft takes place. Furthermore, one or more of the bearings can be provided with a sealing structure, which seals the transmission and/or the generator. The transmission mechanism and the generator may be arranged in a housing and one or more bearings guiding the one or more drive shafts out of the housing may be sealed. The friction wheel is preferably always arranged outside the housing. The sealing makes the energy generating device less sensitive to dirt and liquids, such as debris, dust, and/or cooling of the lubricant emulsion. In particular the housing passage of the housing through which the one or more drive shafts extend.

The friction wheel of the energy generating device is preferably designed in such a way that it has a small bearing surface on the guide element in order to ensure a high surface pressure (Fl ä chenpress) between the friction wheel and the guide element, in one embodiment of the invention the friction wheel has a bearing region which, in the unloaded state, has a radius, this bearing region preferably transforms tangentially into a linear, one-sided or wedge-shaped (keilformige) widening of the friction wheel, in the region fixed to the drive shaft, the friction wheel has, for example, a constant thickness.

The friction wheel preferably has a raceway (Laufbahn) on the guide element, which does not correspond to one or more rolling surfaces (Lauffl ä che) of the rolling elements of the guide arrangement, so that the influence of the friction wheel on the wear of the rolling elements or of the rolling element guide surfaces is eliminated.

The energy generating device therefore does not change and/or reduce the additional surface (Anbaufl ä che) of the guide carriage, on which one or more accessories (Anbauteile), for example a workpiece holder, can be placed.

The housing of the energy generating device is preferably designed such that it does not project beyond the guide arrangement perpendicularly or radially to the direction of movement of the guide arrangement. This has the advantage that the attachment projecting beyond the guide carriage can be arranged on the attachment surface and does not require an increase in installation space perpendicular to the direction of movement.

The linear movement device can be designed as a spindle guide (Spindelfuhrung). In this embodiment of the invention, the guide member is a spindle on which at least one spindle nut is movably arranged as a guide assembly, said spindle nut being able to have rolling bodies.

The housing preferably overlaps (ü bergeifen) the spindle by a maximum of 180 ° when viewed in cross section, so that a rear engagement cannot be achieved and the housing can be mounted in a simple manner.

The spindle preferably has a raceway for a friction wheel in the region of the spindle between at least one helical guide surface for the rolling bodies. In other words, the preferably likewise helical raceway of the friction wheel is located in the region of the spindle with the largest diameter. Advantageously, no interference with the spindle or spindle nut design (Konstruktion) is required, and the guide surfaces of the rolling bodies are not affected by the friction wheel.

In order to improve the guidance of the friction wheel on the rolling bodies and to avoid the friction wheel jumping into the rolling body guide surfaces, it may be advantageous to provide the region of the raceway of the friction wheel with a groove, in particular a helical groove.

In a further embodiment of the invention, the friction wheel can be adjusted in such a way that the plane of rotation of the friction wheel has an angle with respect to the axis of rotation of the spindle, which angle corresponds to the angle of rise (steigingswinkel) of the pitch (gewinnergans) of the spindle. The friction wheel can thus be guided more securely on the raceway and, if the raceway is equipped with grooves, the roller cannot skew therein (verkantet). The drive shaft of the friction wheel can likewise be adjusted and/or equipped, for example, with a cross joint (Kreuzgelenk) which enables a particularly parallel mounting of the drive shaft of the friction wheel to the rotational axis of the spindle. A spider is a clutch which can transmit the rotational speed of one shaft to another, wherein the shafts intersect and the angle of intersection can be changed during the transmission of motion. In other words, the axis of rotation of the friction wheel is arranged relative to the plane of rotation of the spindle in such a way that the friction wheel rotates parallel to the pitch of the thread, which results in less friction.

The linear movement device can also be a profile rail guide (profischienenfuhung). Such a profile rail guide has a profile rail with a profile recess and a guide carriage, which may have rolling bodies, which are arranged on a guide rail.

The housing of the energy generating device, which is arranged on the profile rail, is preferably designed in a U-shape. The arms of the housing (Schenkel) preferably surround the guide rail and are, for example, inserted into a profile recess. In order to make the energy generating device particularly usable as a retrofitting solution, the housing of the energy generating device can advantageously be mounted perpendicular to the direction of movement of the guide carriage. For this purpose, the housing has, for example, a plurality of partial parts which can be separated in such a way that the housing can be mounted. The housing part can preferably be designed such that it contains at least the part of the housing which engages into the profile recess. An alternative or additional possibility is to design the housing at least partially elastic, so that the housing can be temporarily deformed for installation in such a way that it can be moved on the profile rail perpendicular to the direction of movement, so that the arms surround the profile rail.

The raceway for the friction wheel is preferably arranged on the profile rail of the profile rail guide in such a way that the raceway is arranged between the rolling element running surfaces in a guide carriage with two or more rows of rolling elements. The raceway is therefore preferably arranged adjacent to at least one rolling element running surface, for example also if only one rolling element running surface is provided. No changes in the design of the profile rails or the guide carriages are therefore required here either. Furthermore, the raceways of the friction wheel are therefore in the region containing the lubricating material in order to lubricate the rolling bodies. Advantageously, in this embodiment, the sliding of the friction wheel can be used for checking the lubricant state.

Drawings

Preferred embodiments of the invention are explained in detail below with the aid of schematic drawings. In the figure:

fig. 1 shows a perspective view of a spindle guide with an energy generating device according to a corresponding exemplary embodiment;

fig. 2 shows a further perspective view of the spindle guide mechanism of fig. 1 with an energy generating device;

FIG. 3 is a part of a longitudinal section of the spindle guide mechanism of FIG. 1;

fig. 4a to 4c each show a schematic representation of an energy generating device of a profile rail guide according to a corresponding embodiment;

fig. 5a to 5d each show a housing of the energy generating device of the profile rail guide according to a corresponding exemplary embodiment in a perspective view;

fig. 6a and 6b show a schematic representation of an energy generating device according to a corresponding exemplary embodiment with a sealed space shown; and

fig. 7a and 7b each show a friction wheel of an energy generating device according to a corresponding exemplary embodiment in a schematic perspective view.

Detailed Description

Fig. 1 shows a spindle rail guide (spindelschienenfuhung) 1 with a spindle 2 on which a spindle nut 4 is arranged, on which a power generating device 6 is seated (disposed). The energy generating device 6 has a housing 8 which surrounds the spindle 2 of the spindle guide 1. The housing 8 does not project beyond the spindle nut 4 perpendicularly to the direction of movement. The housing 8 is furthermore divided into two planes. An electronic device 10 is fastened to an outer surface of a plane arranged radially adjacent to the spindle 2. The electronic device 10 may for example comprise a sensor system and/or an evaluation unit. Between these planes and/or on the plane formed by the two parts due to the through-guiding of the spindle 2 and/or on the inner surface of the outer plane, an energy generating device 6 is arranged. The energy generating device has a friction wheel 12, which is connected to a generator 14. At the location where the friction wheel 12 is arranged, the housing 8 is open towards the spindle 2. The friction wheel 12 bears there against the spindle 2.

According to fig. 2, the housing 8 of the energy generating device 6, viewed in the circumferential direction of the main shaft 2, encloses only half of the main shaft 2, which means 180 ° of the cross section of the main shaft 2. The housing 8 has a fixing plate 16 towards the spindle nut 4. The fastening plate is semicircular in shape and provides the possibility of fastening the housing 8 to the spindle nut 4, for example by screwing. In this embodiment the spindle nut 4 is equipped at one end in the axial direction with a flange, to which, for example, a connection structure can be screwed. In this case, the fixing plate 16 is also seated on the flange of the spindle nut 4. It has been shown that the axis of rotation of the spindle 2 and the axis of rotation of the friction wheel 12 are adjusted (ansellen). The adjustment angle of the rotation plane of the friction wheel corresponds to the rising angle of the thread. The generator 14 also has a cable (Verkabelung) which runs, for example, parallel to the axis of rotation of the main shaft 2 and which connects the generator 14 to the electronic device 10.

Fig. 3 shows a helical rolling element running surface 18 on the spindle 2. Between the rolling element running surfaces 18 there is a likewise helical surface which serves as a raceway 20 for the friction wheel 12. It also has a spiral groove 22 in which the friction wheel 12 is guided. The groove 22 preferably has a smaller depth than the rolling element running surface 18 and is designed, for example, to be narrower. The spindle 2 has a bore 24 in its circular base surface, for example for the purpose of receiving a stop.

According to fig. 4a, a profile rail 26 with a profile recess 28 is shown. In the corresponding profile recess (profiaussbauung) 28, a rolling element running surface 30 of a guide carriage is provided, which is arranged on the profile rail 26 in a movable manner and which has a double-row rolling element race (walzkorpreumlauf). Between these rolling element running surfaces 30, a raceway 32 of a friction wheel 34 is arranged. The friction wheel 34 of the energy generating device 36 is arranged in the present exemplary embodiment on a common drive shaft 38 with a generator 40. The axes of the drive shaft 38 and of the cylindrical generator 40 are arranged laterally to the profile rail 26 and approximately perpendicularly to the surface of the profile rail 26, i.e. perpendicularly to the surface which does not have the profile recess 28 and which is opposite one surface of the guide carriage. Fig. 4b illustrates a further exemplary embodiment of the connection between the friction wheel 34 and the generator 40. Here, a worm gear (schneckenragetriebe) 42 is schematically shown. This worm gear mechanism makes the drive shaft of the friction wheel 34 and the drive shaft of the generator 40 not parallel to each other but perpendicular to each other. The drive shaft of the friction wheel 34 is arranged here laterally to the profile rail 26 and perpendicularly to the surface of the profile rail 26. The drive shaft of the generator 40 is arranged above the surface of the profile rail 26. According to fig. 4c, the friction wheel 44 is connected to the generator 40 via a spur gear 46, wherein the drive shaft of the friction wheel 44 and the generator 40 are arranged parallel. The drive shaft is arranged laterally to the profile rail 26 and substantially perpendicularly to the surface of the profile rail 26. Since the drive shaft of the friction wheel 44 is arranged close to the profile rail 26 by means of the spur gear mechanism 46, i.e. the drive shafts of the friction wheel 44 and of the generator 40 are offset, the friction wheel 44 can have a smaller diameter in the present exemplary embodiment and the drive shaft of the friction wheel 44 can be decoupled from the drive shaft of the generator 40 by means of the spur gear mechanism 46 and the drive shaft of the generator 40 can be mechanically relieved of load.

Fig. 5a shows a housing 54 of the energy generating device 36, which is intended to be arranged on the profile rail 26 perpendicular to the direction of movement of the guide carriage. The housing 54 in this embodiment has two housing arms 50 which may be separated by a connecting plate 52. The housing arm 50 can thus be inserted into the profile recess 28 and then connect the connecting plate 52 with the housing arm 50. The mounting on the profile rail 26 can thus be easily achieved. Another embodiment is shown in fig. 5 b. The housing 56 is divided into two identical parts, wherein the parts each comprise a housing arm 50 and a half web 52. The housing 56 can also be easily mounted here by separating the two housing parts. In fig. 5c, an embodiment is shown in which the housing 58 is likewise divided into two parts. Here, one part contains the housing arm 50 and the connecting plate 52 and the other part contains the housing arm 50. It is essential here that the housing parts each contain a part of the housing 58 which engages into the profile recess 28. According to fig. 5d, the housing 60 can also be designed elastically. The housing 60 can be seen on the left in this case in the state without force. The housing arms 50 can be bent away from one another by the action of force and the webs 52 are likewise deformed, as illustrated on the right in the drawing.

Fig. 6a shows an energy generating device 70 with a bevel gear 72, which connects a friction wheel 74 to a generator 76. Here, in the present embodiment, the friction wheel 74 is seated on the drive shaft 78, which is held by two bearings 80, so that the drive shaft 78 of the friction wheel 74 cannot be adjusted by an external force. Furthermore, a sealed space 82 is provided, which encloses the bevel gear mechanism 72 and the bearing 80. The generator 76 and the friction wheel 74 are here arranged outside the sealed space 82 and the respective drive shaft 78 breaks the sealed space 82 and is provided with a sealed bearing 80. The generator 76 is seated with its end face on the shaft side in a sealing space 82 in a sealing manner, so that the generator 76 as a whole is sealed despite the fact that the generator bearings may not be sealed. Since dirt and/or lubricants may be found, for example, in the profile rail, at least the bearing 80 arranged between the friction wheel 74 and the gear mechanism 72 is provided with a sealing structure. Fig. 6b shows an embodiment in which the sealed space 84 encloses the generator 76 in addition to the bevel gear 72 and the bearing 80. The friction wheel 74 is also arranged outside the sealed space 84 in this case.

One embodiment of a friction wheel 86 is illustrated in accordance with fig. 7 a. The friction wheel 86 has a bearing surface 88. This bearing surface is provided with an outwardly arched radius. The friction wheel 86 also has a wedge-shaped widening 90 on both sides, which is connected approximately tangentially to the bearing surface 88. The fixed area 92 is located in the center of the friction wheel 86. This fixing area has a constant thickness and a hole 94 for fixing in the center. In fig. 7b, an exemplary embodiment of a friction wheel 96 is shown, which is cylindrically shaped. A hole 94 for fixing is also provided in the center. The friction wheel 96 is provided on its side with a groove 98 into which an elastic ring can be inserted. The friction wheel 96 also has a radius 100 in the transition region from the side face to the base face of the cylinder.

A linear motion device is disclosed, comprising a guide component and a movable guide component guided on the guide component, wherein an energy generating device (6; 36; 70) is fixed on the guide component. The energy generating device has a generator (14; 40, 76) which is driven by the friction wheel (12; 34; 44; 74; 86; 96). A friction wheel (12; 34; 44; 74; 86; 96) bears against the guide member for rolling and is rotationally driven by movement of the guide assembly.

List of reference numerals

1 spindle guide mechanism

2 spindle

4 spindle nut

6; 36; 70 energy generating device

8; 54, a first electrode; 56; 58; 60 case

10 electronic device

12; 34; 44; 74; 86; 96 friction wheel

14; 40; 76 electric generator

16 fixed plate

18; 30 rolling surface of rolling body

20; 32 raceway

22; 98 groove

24 holes

26 section bar rail

28 section bar concave part

38; 78 drive shaft

42 worm gear

46 spur gear transmission mechanism

50 casing arm

52 connecting plate

72 bevel gear transmission mechanism

80 bearing

82; 84 sealed space

88 bearing surface

90 widening part

92 fixation area

94 holes

Radius of 100