Position transmitter device and position controller comprising the position transmitter device
The position sensor device with toothed coupling parts and a clamping element addresses the vulnerability of existing controllers to high forces, ensuring robust and precise positioning by limiting torque and allowing realignment, thus enhancing durability.
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- SAMSON AG
- Filing Date
- 2025-12-09
- Publication Date
- 2026-06-18
Smart Images
Figure EP2025085986_18062026_PF_FP_ABST
Abstract
Description
[0001] 31.10.2025
[0002] Positioning device and position controller with the positioning device
[0003] State of the art
[0004] Positioning devices for position controllers are already known, in which the force of an actuating movement transmitted via two coupling elements is limited, particularly to prevent damage to the position controller. The actuating movement is typically measured using a magnetic sensor, for example, an AMR sensor, and a magnet. The magnet is mounted on a magnet carrier, which is rigidly connected to a coupling element acting as a shaft. A lever is attached to the coupling element, converting the actuating movement into a rotary movement. A torsion spring ensures backlash-free operation of the entire actuating movement measurement. The operating range of this measurement is generally limited to approximately 190° due to this torsion spring. The rotation angle of the coupling element is limited by two stops in the housing. The rest position of the lever is not defined and can be anywhere within the range of 0–360°.The coupling components together form a friction-fit coupling. Typically, a device similar to a slip clutch is used to essentially decouple the coupling components if excessive force is applied.
[0005] High acceleration or deceleration values, e.g. due to a steam hammer in a line of a process plant containing a field device controlled by the position controller, for example a control valve, can permanently change the position of the two coupling parts relative to each other in a slip clutch with flat friction plates.
[0006] The object of the invention is to provide an improved position sensor device that has an advantageously higher resistance and robustness to high acceleration or deceleration values.
[0007] Advantages of the invention
[0008] The invention relates to a position transmitter device for a position controller, comprising a coupling unit and at least one transmission element for transmitting a movement of an actuator of a valve to the coupling unit, wherein the at least one transmission element is designed such that the movement of the actuator is transmitted to the coupling unit as a rotational movement, wherein the coupling unit is provided for applying a restoring force to the transmission element, wherein the coupling unit comprises at least a first coupling part and at least a second coupling part, wherein the first coupling part is connected to the transmission element, and wherein the coupling unit comprises a restoring element for generating the restoring force, which
[0009] Page 1 of 26 31.10.2025 second coupling part subjected to the restoring force, wherein the coupling unit comprises coupling means for an effective connection between the first coupling part and the second coupling part during a movement about a rotational axis of the coupling unit.
[0010] It is proposed that the first coupling part and the second coupling part are designed such that the coupling means are formed as corresponding toothings on the first coupling part and on the second coupling part, respectively, acting axially relative to the axis of rotation, wherein the first coupling part and the second coupling part are provided to bear against each other via the coupling means, particularly in a state unloaded by the transmission element, wherein the coupling unit comprises at least one clamping element which applies a locking force to the first coupling part and / or the second coupling part in a region of the coupling means against a movement of the first coupling part and the second coupling part relative to each other that is directed substantially parallel to the axis of rotation.
[0011] The positioner is specifically designed for controlling the position of a valve, particularly a control valve in a process plant. The transmission element is designed, in particular, as a lever, arm, strut, or the like, and is connected to a component that transmits or executes a movement of the actuator, preferably an actuating rod and / or the actuator of the valve. The transmission element and / or the first coupling element are designed such that, when the transmission element moves, particularly during an actuating movement, the first coupling element is subjected to a force that causes it to move about the axis of rotation.
[0012] The first coupling part and the second coupling part can each be designed as a single piece or as multiple pieces. Preferably, the first coupling part and the second coupling part are each designed such that, in a mounted state of the positioner device, in particular the coupling unit, the first coupling part and the second coupling part act as a single component during movement, wherein, in particular, the individual elements of the first coupling part and the second coupling part are positively, force-, and / or materially connected to one another and / or arranged so that they are immovable relative to each other. Preferably, the transmission element and the first coupling part are connected to one another in a rotationally fixed manner, particularly relative to the axis of rotation, for example, by a positive and / or force-fit connection. The return element is preferably designed as a spring, in particular a torsion spring.Preferably, the pressure element is designed as a spring, in particular a compression spring.
[0013] Preferably, the position controller, in particular the position transmitter device, comprises a sensor unit for detecting the movement of the actuator transmitted by the transmission element. Preferably, the sensor unit comprises at least one sensor element attached to the first
[0014] Page 2 of 26 31.10.2025
[0015] The coupling component is arranged. The sensor unit can, for example, be designed as a magnetic sensor, with the sensor element being designed as a magnet. In particular, the sensor element is arranged essentially centrally to the axis of rotation.
[0016] Preferably, the coupling unit is designed such that the first coupling part and the second coupling part are held against movement around the axis of rotation relative to each other by the coupling means and the clamping element in a form-fit and force-fit manner. A design of the coupling means and the clamping element preferably specifies a limit force or a limit torque for transmission through the transmission element, wherein, if the limit force or the limit torque is exceeded, the teeth on the first coupling part and on the second coupling part are moved relative to each other against the locking force, in particular along a direction of rotation around the axis of rotation and substantially parallel to the axis of rotation. In particular, the coupling unit is designed such that, if the limit force or the limit torque is exceeded, the first coupling part and the second coupling part are held against each other by the locking force.the limit torque is moved in such a way that the first coupling part and the second coupling part are movable or decoupled relative to each other with respect to a movement about the axis of rotation, in particular the teeth of the first coupling part and the second coupling part move along each other.
[0017] The coupling means preferably comprise a first toothed arrangement formed on the first coupling part and a second toothed arrangement formed on the second coupling part. The coupling means, in particular the first toothed arrangement and the second toothed arrangement, each comprise, in particular, a plurality of individual teeth. The phrase "the teeth on the first coupling part and on the second coupling part are formed correspondingly to each other" means, in particular, that the teeth on the first coupling part and on the second coupling part can be arranged, in particular substantially completely, within one another, wherein, in particular, the teeth on the first coupling part can be pressed flat against the teeth on the second coupling part, preferably in the state unloaded by the transmission element.Preferably, the coupling means on the first coupling part, in particular the first tooth arrangement, and the coupling means on the second coupling part, in particular the second tooth arrangement, are essentially identical in construction with respect to a dimension of the individual teeth, an inclination angle and / or a material.
[0018] Preferably, the clamping element is designed and / or arranged such that the teeth, particularly in the unloaded state due to the transmission element, are pressed together by the locking force. Preferably, the first coupling part and
[0019] Page 3 of 26 31.10.2025 the second coupling part and the coupling means are designed such that the teeth of the first coupling part are moved along the teeth of the second coupling part when the first coupling part is subjected to a force by the transmission element, with a frictional force between the teeth of the first coupling part and the teeth of the second coupling part as well as the locking force counteracting the force transmitted by the transmission element.
[0020] A design of the position sensor device according to the invention allows for advantageously high robustness against rapid force changes on the transmission element. After acceleration or deceleration about the axis of rotation subsides, the teeth of the two coupling parts realign themselves with each other due to an axial force from the pressure element. To adjust the coupling, the maximum transmissible torque must be exceeded. This torque is defined by the axial force, the helix angle of the teeth, and the friction between the teeth. Even if the maximum transmissible force is exceeded and / or during rapid force changes, damage to the coupling elements can thus be prevented.
[0021] It is further proposed that the first and second coupling parts are designed such that the coupling means are configured as Hirth couplings between the first and second coupling parts. This allows for a conveniently simple and reliable coupling between the coupling parts. In particular, the teeth are formed on the face. Preferably, the teeth of the first coupling part and the teeth of the second coupling part are in positive engagement, especially when unloaded by the transmission element and / or when subjected to a force or torque below the limiting force. However, other configurations of the coupling means, different from Hirth couplings, are also conceivable.In particular, in a Hirth-type design, the contact surfaces of teeth or prongs of the coupling means designed as a toothing system are essentially flat.
[0022] Furthermore, it is proposed that the first coupling part and the second coupling part are designed such that the coupling means, which are designed as teeth on the first coupling part and on the second coupling part, each have two contact surfaces which together form a tooth or prong, wherein the contact surfaces each have a design other than a flat surface, preferably uneven or curved. In particular, the teeth are each formed by a plurality of prongs or teeth, wherein each of the prongs or teeth has two contact surfaces or in the
[0023] Page 4 of 26 31.10.2025
[0024] The toothing is essentially formed by two contact surfaces. Preferably, the teeth, in particular the prongs or teeth of the respective toothing, extend, preferably substantially parallel to the axis of rotation, over one tooth height. Particularly preferably, the contact surfaces, with the exception of transition areas to adjacent contact surfaces, extend substantially completely over the tooth height. The teeth, in particular the prongs or teeth, each comprise, in particular, at least one tip, which is preferably bounded by two contact surfaces. It is conceivable that the teeth, in particular the prongs or teeth, especially when viewed radially to the axis of rotation, each have an edge, a bulge, or a chamfer in the region of the tips.Preferably, the contact surfaces, viewed in a cross-sectional plane oriented perpendicular to a radial direction towards the axis of rotation, each have a principal extent that changes at least at an angle relative to the axis of rotation along the radial direction. Preferably, the angle of the principal extent of the individual contact surfaces relative to the axis of rotation decreases radially towards the axis of rotation. Preferably, the first coupling part and the second coupling part are designed such that the teeth or prongs each have a substantially decreasing angle towards the tip in the radial direction towards the axis of rotation.In contrast to Hirth couplings, this design reduces wear on the gear teeth, particularly because, unlike Hirth couplings, when the first and second coupling parts move apart around the axis of rotation, the load is not applied exclusively tangentially to the contact surfaces or, in cross-section, only at a single point on the outer diameter, but rather across the entire surface. The angle of the contact surfaces relative to the axis of rotation is preferably constant across the entire contact surface at a constant distance from the axis of rotation and changes with increasing distance. Specifically, the angle of the contact surfaces relative to the axis of rotation decreases as the distance from the axis of rotation decreases. As a result, when the first and second coupling parts are axially displaced relative to each other, the contact surfaces always remain in contact across the entire tooth width.
[0025] Furthermore, it is proposed that the first coupling part and the second coupling part are designed such that the teeth or serrations each have a substantially constant tooth height radially to the axis of rotation. Preferably, the tooth height forms the maximum axial extent of the individual teeth, in particular serrations or teeth, especially parallel to the axis of rotation. In particular, the tooth height extends substantially parallel to the axis of rotation. Preferably, the contact surfaces extend at least largely, and preferably substantially completely, over the tooth height. In an embodiment of the coupling means as Hirth teeth, the tooth height decreases radially towards the axis of rotation, with a straight line extending along a
[0026] Page 5 of 26 31.10.2025
[0027] The tooth tips of the gears are each oriented obliquely to the axis of rotation. In an alternative embodiment, the coupling means are designed such that the tooth height remains essentially constant radially to the axis of rotation. In particular, the gears, especially the teeth, are designed such that a curve extends along each tooth tip, or along a fictitious helical line. This advantageously results in low wear on the coupling components. Uneven loading of the teeth radially to the axis of rotation can be advantageously prevented.
[0028] Furthermore, it is proposed that the pressure element be designed as a compression spring and supported at one end on the first coupling part and at the other end on the second coupling part. This allows for an advantageously compact design of the positioner device. In addition, a smaller number of different components of the positioner device can be advantageously achieved, particularly since an additional support element can be advantageously omitted. The pressure element is preferably arranged coaxially with the first and second coupling parts around the axis of rotation. The pressure element is preferably arranged around the axis of rotation. In particular, the pressure element is arranged such that the axis of rotation extends centrally through the pressure element. Preferably, the pressure element defines a passage, wherein the first coupling part extends at least partially through the passage.In particular, the clamping element is arranged essentially in a sleeve-like manner around the first coupling part. Preferably, the clamping element is designed to be held on the first coupling part.
[0029] Furthermore, it is proposed that the positioner device comprises a housing-mounted support element, which is in particular part of the positioner, wherein the return element is designed as a torsion spring and is supported at one end on a support element and at the other end on the second coupling element, the second coupling element being designed to transmit the return force of the return element via the coupling means to the first coupling element and to the transmission element. An advantageously compact design for integration into a housing of the positioner is possible. Preferably, the coupling unit is movably mounted relative to the support element. It is conceivable that the support element or another part of the positioner, in particular a housing of the positioner, is designed to hold the coupling unit in a fixed position.Preferably, the return element is arranged coaxially with the first coupling part and the second coupling part around the axis of rotation. The return element is preferably arranged around the axis of rotation. In particular, the return element is arranged such that the axis of rotation extends centrally through the return element. Preferably, this is limited.
[0030] Page 6 of 26 31.10.2025
[0031] The return element comprises a feedthrough, wherein the first coupling part extends at least partially through the feedthrough. In particular, the second coupling part is arranged at least partially within the feedthrough of the return element. Preferably, the second coupling part has at least one guide section arranged within the feedthrough of the return element. In particular, the guide section is designed to hold and support the return element, wherein, in particular, a maximum radial diameter of the guide section relative to the axis of rotation essentially corresponds to an inner diameter of the return element or a maximum diameter of the feedthrough of the return element. In particular, the return element is arranged around the first coupling part in a sleeve-like manner.
[0032] Furthermore, it is proposed that the second coupling part defines a passage for the partial reception of the first coupling part, wherein the second coupling part is arranged such that the axis of rotation extends through the passage. An advantageously compact design can be achieved, particularly since the coupling parts can be arranged nested within one another. Specifically, the coupling means are spaced apart from an inner wall of the second coupling part that defines the passage of the second coupling part. Preferably, the first coupling part is rotatably arranged about the axis of rotation within the passage defined by the second coupling part. The second coupling part preferably comprises at least one inner surface defining the passage of the second coupling part, which is provided for arrangement on an outer surface of the first coupling part and centers the first coupling part within the passage.It is conceivable that the second coupling part forms a receiving recess, with the clamping element being arranged at least partially within the receiving recess. In particular, this can enable an advantageously compact design of the coupling unit.
[0033] Furthermore, it is proposed that the coupling elements, designed as teeth, on the first and second coupling parts are configured such that the smallest inclination angle of the individual teeth corresponds to a value within a range of 15° to 65°, preferably between 20° and 50°, and particularly preferably between 25° and 45°. This design of the teeth allows for an advantageous range for limiting the maximum torque. In addition, a suitably robust design of the teeth can be achieved, particularly with respect to loads along a circumferential direction around the axis of rotation. If the inclination angle is smaller, the teeth no longer self-center when the applied force is removed. If the inclination angle is larger, the torque of the coupling unit is no longer reliably limited. This behavior of the teeth depends in particular on the
[0034] Page 7 of 26 31.10.2025
[0035] The clamping element, in particular its clamping force, and a coefficient of friction, which is also determined by the material of the first and second coupling parts, are crucial factors. However, a certain stiffness of the clamping element is required, and over-dimensioning of the clamping element through increased material stress and a more expensive design is undesirable. Preferably, the coupling means are designed such that the angle of inclination of the individual teeth is essentially constant radially to the axis of rotation. Even more preferably, the coupling means are designed such that the width of the individual teeth, which is formed along the direction of rotation about the axis of rotation, decreases radially to the axis of rotation, particularly to ensure a uniform distribution of an equal number of teeth in the direction of rotation about the axis of rotation at the same angle of inclination.Preferably, the coupling means are designed such that the tooth height of the individual teeth, which is parallel to the axis of rotation, decreases radially towards the axis of rotation, particularly to ensure the uniform distribution of an equal number of teeth in the direction of rotation around the axis of rotation at the same angle of inclination. Preferably, the angle of inclination of each individual tooth extends from an imaginary plane perpendicular to the axis of rotation to a tooth flank of the respective tooth. Preferably, all teeth are essentially identical. Preferably, the angle of inclination corresponds to an angle between an imaginary plane oriented perpendicular to the axis of rotation and the individual contact surfaces of the teeth.
[0036] Furthermore, it is proposed that the first coupling part be designed in multiple sections, wherein one section of the first coupling part is connected to the transmission element and extends along the axis of rotation, and wherein another section of the first coupling part is arranged behind the second coupling part along the axis of rotation, viewed from the transmission element. A portion of the coupling means, designed as teeth and intended to interact with the coupling means formed on the second coupling part, is formed on a side of the further section of the first coupling part facing the transmission element. This allows for an advantageously compact design, particularly since the two coupling parts can be arranged nested one behind the other.A multi-part design of the first coupling part allows for advantageously simple and quick assembly of the coupling unit, whereby, in particular, the other components of the positioner device must be arranged on or around the first coupling part. Preferably, the first part and the second part of the first coupling part are firmly connected to each other in the assembled state of the positioner device, especially via a form-fit, force-fit, and / or material-fit connection, such as an adhesive bond.
[0037] Page 8 of 26 31.10.2025 or via a positive fit achieved by means of undercuts. Preferably, the section of the first coupling part is essentially pin- or rod-shaped. In particular, the section of the first coupling part extends, especially centrally, along the axis of rotation, wherein the axis of rotation particularly includes a central axis of the section. The further section is preferably disc- or knob-shaped and is connected to the section at an end of the section formed along the axis of rotation. At another end formed along the axis of rotation, preferably opposite the first end, the section preferably has a connection area for a connection with the transmission element.Particularly preferably, the pressure element, the return element, the second coupling part and / or the support part are arranged, especially when viewed perpendicular to the axis of rotation, along the axis of rotation between the further section and the connection area or the transmission element.
[0038] Furthermore, it is proposed that the first coupling part be designed in multiple parts, wherein a section of the first coupling part is connected to the transmission element and extends along the axis of rotation, wherein the first coupling part, viewed along the axis of rotation, comprises at least one support extension, formed substantially perpendicular to the axis of rotation, between a connection area of the section for connection with the transmission element and the coupling means arranged on the first coupling part. This support extension is supported on or formed by the section, and the pressure element is arranged such that it is supported at one end on the support extension and at another end on the second coupling part. An advantageously compact design can be achieved, particularly since the two coupling parts can be arranged nested one behind the other.Furthermore, a suitably small number of different components of the positioner device can be achieved, particularly since an additional support element can be advantageously omitted. Alternatively, it is conceivable that the first coupling part is essentially formed in one piece and includes at least one support extension, formed essentially perpendicular to the axis of rotation, for bearing against the pressure element. Preferably, the support extension has at least one contact surface for bearing against the pressure element, which is, in particular at least partially, essentially flat and formed essentially perpendicular to the axis of rotation. It is conceivable that the support extension is formed integrally with the first coupling part or the section, or that it is arranged as a separate component on the first coupling part or the section and connected to it.In a preferred embodiment, the first coupling part comprises a support element which, when arranged on the first coupling part or the component section, forms the support extension. Preferably, the support element and / or the support extension is disk-shaped and extends, particularly when arranged on the first coupling part or the component section,
[0039] Page 9 of 26 31.10.2025 radially from an outer wall of the first coupling part or section and / or from the axis of rotation, wherein, in particular, the clamping element is arranged around the first coupling part or section and rests against the support extension. It is conceivable that the support element is attached to the first coupling part or section via a screw connection or is connected to the first coupling part or section by clamping. Alternatively, it is conceivable that the support element has a flexible design and is movable around the first coupling part or section. In particular, the first coupling part or section forms a recess on its outer wall for the partial reception of the support element, wherein the support element is positively locked to the first coupling part or section by its arrangement within the recess.
[0040] Furthermore, it is proposed that the first coupling part and the second coupling part each have a contact surface for the clamping element, wherein the contact surfaces and the coupling means are each formed substantially concentrically around the axis of rotation, and wherein the contact surfaces, viewed along the axis of rotation, each have a maximum diameter that is smaller than a minimum inner diameter of the coupling means. This allows for an advantageous design of the gear teeth with regard to robustness and force transmission. In addition, an advantageously compact design of the coupling unit can be achieved. In particular, the contact surface of the first coupling part is formed by the support extension. The contact surface(s) of the first coupling part and / or the second coupling part is / are each formed substantially perpendicular to the axis of rotation.The maximum diameter of the contact surfaces extends substantially perpendicular to the axis of rotation. Preferably, the contact surfaces are designed such that their maximum diameter intersects the axis of rotation at a single point. Preferably, the inner diameter of the coupling means extends perpendicular to the axis of rotation. Preferably, the coupling means are designed such that the minimum inner diameter is substantially identical when viewed around the axis of rotation or along a direction of rotation around the axis of rotation. Preferably, the coupling means extend radially to the axis of rotation from the inner diameter to a maximum diameter or outer diameter of the coupling means. Preferably, the clamping element is arranged closer to the axis of rotation than the return element and / or the coupling means.In particular, the second coupling part is designed such that the contact surface of the second coupling part is located on a side facing away from the coupling means, and especially from the further section of the first coupling part. Preferably, the coupling means of the first coupling part are arranged on an outer edge region of the first coupling part, especially of the further section, relative to the axis of rotation. Preferably, the coupling means of the second coupling part are located on an outer edge region relative to the axis of rotation.
[0041] Page 10 of 26 31.10.2025
[0042] The coupling means are arranged in the edge region of the second coupling part. Preferably, the coupling means extend along the axis of rotation to an outer contour of the coupling unit, in particular of the first coupling part and the second coupling part. Preferably, the coupling means, in particular the individual teeth, each have a maximum radial extent that corresponds to at least 5% and particularly preferably at least 8° of a maximum diameter of the coupling unit, in particular of the coupling part forming the respective coupling means. Preferably, the maximum radial extent of the coupling means, in particular the individual teeth, extends towards the axis of rotation at most to the opening of the second coupling part and / or to an outer wall of the first coupling part or the section of the first coupling part.In a preferred embodiment, the effective diameter of the coupling implemented by the coupling means is between 15 mm and 25 mm. In a preferred embodiment, the clamping element is designed such that the locking force is between 30 N and 50 N. In a preferred embodiment, the coupling unit is designed such that the limiting torque is at least 0.5 Nm, preferably at least 0.7 Nm, and particularly preferably at least 0.85 Nm.
[0043] Furthermore, a positioner for a control valve with a position sensor device according to the invention is proposed. The positioner includes, in particular, the sensor unit. Preferably, the position sensor device is arranged at least partially, more preferably at least largely, and most preferably, with the exception of a connection area of the first coupling part, essentially completely, within a housing of the positioner. Preferably, the support element is designed as part of the housing of the positioner or connected to it. The positioner is intended, in particular, for use with lift and / or rotary valves. Especially when used with a rotary valve, the transmission element can be designed as part, in particular as an extension, of an actuating rod.In particular, when used with a rotary valve, the positioner can be designed and / or arranged such that the axis of rotation of the coupling unit includes an axis of rotation of the valve or is at least substantially parallel to the axis of rotation of the valve. When used with a poppet valve, the positioner can be designed and / or arranged such that the axis of rotation of the coupling unit is substantially perpendicular to a stroke axis of the valve.
[0044] By designing the positioner according to the invention, an advantageously robust and safe detection of a positioning movement can be made possible.
[0045] Page 11 of 26 31.10.2025
[0046] The position transmitter device and / or the position controller according to the invention are not intended to be limited to the application and embodiment described above. In particular, the position transmitter device and / or the position controller according to the invention may, in order to fulfill a function described herein, have a different number of individual elements, components, and units than the number specified herein. Furthermore, values within the specified limits of the value ranges stated in this disclosure are also considered disclosed and freely usable.
[0047] Page 12 of 26 31.10.2025
[0048] Drawings
[0049] Further advantages become apparent from the following description of the drawings. The drawings illustrate an exemplary embodiment of the invention. The drawings, the description, and the claims contain numerous features in combination. A person skilled in the art will expediently consider the features individually and combine them into meaningful further combinations.
[0050] They show:
[0051] Figure 1: a schematic sectional view of a position transmitter device of a position controller according to the invention,
[0052] Figure 2: a schematic uncut side view of the position transmitter device according to the invention without a reset element and
[0053] Figure 3: a perspective view of a first coupling part of the position encoder device according to the invention with coupling means designed as axially effective teeth relative to an axis of rotation.
[0054] Description of the exemplary embodiment
[0055] Figures 1 to 3 show a position transmitter 10 as part of a position controller 12 for a valve. The position transmitter 10 comprises a coupling unit 14 and a transmission element 16 for transmitting a movement of an actuator of the valve to the coupling unit 14. The position controller 12 includes, in particular, a sensor unit 18 for detecting the movement of the actuator. This movement is caused by a movement of the actuator about a rotational axis 22 of the coupling unit 14, which is transmitted by the transmission element 16. The sensor unit 18 includes, for example, a magnetic sensor 24, such as an AMR sensor, which detects the movement of a magnet 26 connected to the first coupling part 20. However, other configurations of the sensor unit 18 are also conceivable.The position transmitter device 10, with the exception of a connection area 28 of the first coupling part 20 for connection with the transmission element 16, is arranged essentially entirely within a housing 30 of the position controller 12. Preferably, the position transmitter device 10 comprises a support part 32, which is part of the housing 30 of the position controller.
[0056] Page 13 of 26 31.10.2025
[0057] The positioner 12 is designed for use with a poppet valve, wherein the transmission element 16 is designed as a lever which is rotatably arranged via a translational movement of the actuator along a stroke axis about the axis of rotation 22. The transmission element 16 is designed such that the movement of the actuator is transmitted to the coupling unit 14 as a rotational movement. The positioner 12, in particular the position transmitter device 10, can alternatively also be designed / provided for use with a rotary valve. In particular, when used with a rotary valve, the positioner 12 can be designed and / or arranged such that the axis of rotation 22 of the coupling unit 14 includes an axis of rotation of the valve or is at least substantially parallel to the axis of rotation of the valve.
[0058] The coupling unit 14 is designed to apply a restoring force to the transmission element 16. The coupling unit 14 comprises the first coupling part 20 and a second coupling part 34. The coupling unit 14 includes a restoring element 36 for generating the restoring force, which applies the restoring force to the second coupling part 34. The coupling unit 14 includes coupling means 38 for an operative connection between the first coupling part 20 and the second coupling part 34 during movement about the axis of rotation 22 of the coupling unit 14.
[0059] The first coupling part 20 and the second coupling part 34 are designed such that the coupling means 38 are configured as axially effective teeth on the first coupling part 20 and on the second coupling part 34, respectively, corresponding to each other and acting relative to the axis of rotation 22. The first coupling part 20 and the second coupling part 34 are configured such that the coupling means 38 are configured as Hirth couplings between the first coupling part 20 and the second coupling part 34.
[0060] The first coupling part 20 and the second coupling part 34 are designed to bear against each other via the coupling means 38, particularly in a state unloaded by the transmission element 16. The coupling unit 14 comprises a clamping element 40, which applies a clamping force to the first coupling part 20 and / or the second coupling part 34 in a region of the coupling means 38, preventing movement of the first coupling part 20 and the second coupling part 34 relative to each other that is substantially parallel to the axis of rotation 22. The clamping element 40 is designed as a compression spring and is supported at one end on the first coupling part 20 and at another end on the second coupling part 34. The clamping element 40 is arranged coaxially with the first coupling part 20 and the second coupling part 34 about the axis of rotation 22.The pressure element 40 is arranged such that the axis of rotation 22 extends centrally through the pressure element 40.
[0061] Page 14 of 26 31.10.2025
[0062] The clamping element 40 defines a passage, wherein the first coupling part 20 extends at least partially through the passage. The clamping element 40 is arranged essentially in a sleeve-like manner around the first coupling part 20.
[0063] The transmission element 16 and the first coupling part 20 are connected to each other in a rotationally fixed manner, particularly relative to the axis of rotation 22, for example by a positive and / or force-fit connection. In the embodiment shown in the figures, the transmission element 16 rests positively against the first coupling part 20 and is secured to the first coupling part 20 against movement along the axis of rotation 22 by a screw nut. The return element 36 is designed as a torsion spring.
[0064] The coupling unit 14 is designed such that the first coupling part 20 and the second coupling part 34 are held against movement about the axis of rotation 22 relative to each other by the coupling means 38 and the clamping element 40 in a form-fit and force-fit manner. A design of the coupling means 38 and the clamping element 40 specifies a limit force or a limit torque for transmission through the transmission element 16, wherein the coupling means 38, designed as teeth, on the first coupling part 20 and on the second coupling part 34 are moved relative to each other against the locking force when the limit force or limit torque is exceeded, in particular along a direction of rotation 42 about the axis of rotation 22 and substantially parallel to the axis of rotation 22.The coupling unit 14 is designed such that, when the limit force or limit torque is exceeded, the first coupling part 20 and the second coupling part 34 are moved in such a way that the first coupling part 20 and the second coupling part 34 are movable relative to each other or decoupled with respect to movement about the axis of rotation 22, wherein, in particular, the teeth on the first coupling part 20 and on the second coupling part 34 move along one another. The coupling means 38 comprise a first toothed arrangement formed on the first coupling part 20 and a second toothed arrangement formed on the second coupling part 34, wherein the toothed arrangements each comprise all coupling means 38 designed as teeth on the respective coupling part 20, 34 having the toothed arrangement.The coupling means 38, designed as toothed connections, are each essentially identical in construction, particularly with regard to depth, width, angle of inclination 44 and tooth height 76.
[0065] The positioner device 10 comprises the support element 32, which is fixed to the housing and is, in particular, part of the positioner 12, especially the housing 30. The return element 36 is supported at one end on the support element 32 and at the other end on the second coupling element 34. The second coupling element 34 is designed to
[0066] Page 15 of 26 31.10.2025
[0067] The restoring force of the restoring element 36 is transmitted via the coupling means 38 to the first coupling part 20 and to the transmission element 16. The coupling unit 14 is movably mounted relative to the support part 32. It is conceivable that the support part 32 or another part of the positioner 12, in particular the housing 30, is designed to hold the coupling unit 14 in a fixed position. The restoring element 36 is arranged coaxially with the first coupling part 20 and the second coupling part 34 about the axis of rotation 22. The restoring element 36 is arranged such that the axis of rotation 22 extends centrally through the restoring element 36. The restoring element 36 defines a passage, with the first coupling part 20 extending at least partially through the passage.The second coupling part 34 is at least partially arranged within the passage of the return element 36. The second coupling part 34 has a guide section 46, which is arranged within the passage of the return element 36. In particular, the guide section 46 is designed to hold and support the return element 36, wherein, in particular, a maximum radial diameter of the guide section 46 relative to the axis of rotation 22 essentially corresponds to an inner diameter of the return element 36 or a maximum diameter of the passage of the return element 36. The clamping element 40 is arranged within the passage bounded by the return element 36. The return element 36 is arranged essentially in a sleeve-like manner around the first coupling part 20.
[0068] The second coupling part 34 defines a passage for the partial reception of the first coupling part 20, the second coupling part 34 being arranged such that the axis of rotation 22 extends through the passage. The coupling means 38 are each spaced apart from an inner wall of the second coupling part 34, which defines the passage of the second coupling part 34. The first coupling part 20 is rotatably arranged about the axis of rotation 22 in the passage defined by the second coupling part 34. The second coupling part 34 comprises an inner surface 48 defining the passage of the second coupling part 34, which is provided for arrangement on an outer surface of the first coupling part 20 and centers the first coupling part 20 in the passage. The second coupling part 34 forms a connection in the immediate vicinity of the passage of the second coupling part 34.of the first coupling part 20 a receiving recess 50, wherein the pressure element 40 is arranged at least partially within the receiving recess 50.
[0069] The second coupling part 34 has a stop 53 (see Figure 2) which extends radially outwards from an outer wall of the second coupling part 34 and is designed to interact with an inner wall of the housing 30 to achieve a maximum possible
[0070] Page 16 of 26 31.10.2025
[0071] Movement of the coupling unit 14, in particular of the second coupling part 34, to limit the axis of rotation 22.
[0072] The first coupling part 20 is designed in multiple parts, wherein a section 52 of the first coupling part 20 is connected to the transmission element 16 and extends along the axis of rotation 22, and a further section 54 of the first coupling part 20 is arranged behind the second coupling part 34, viewed from the transmission element 16 along the axis of rotation 22. Section 52 and the further section 54 of the first coupling part 20 are, in particular, rigidly connected to one another. A portion of the coupling means 38, designed as teeth and intended to interact with the coupling means 38 formed on the second coupling part 34, is formed on a side of the further section 54 of the first coupling part 20 facing the transmission element 16. Section 52 and the further section 54 of the first coupling part 20 are rigidly connected to one another in an assembled state of the positioner device 10.The section 52 of the first coupling part 20 is essentially pin- or rod-shaped. The section 52 of the first coupling part 20 extends, particularly centrally, along the axis of rotation 22, the axis of rotation 22 comprising a central axis of the section 52. The further section 54 is disk-shaped and connected to the section 52 at an end extending along the axis of rotation 22. At another end extending along the axis of rotation 22 and opposite the first end, the section 52 preferably has the connection area 28 of the first coupling part 20 for a connection with the transmission element 16. The pressure element 40, the return element 36, the second coupling part 34 and the support part 32 are each, in particular viewed perpendicular to the axis of rotation 22, along the axis of rotation 22 between the further section 54 and the connection area 28 respectively.arranged with the transmission element 16.
[0073] The first coupling part 20 comprises, along the axis of rotation 22, between the connection area 28 for connection with the transmission element 16 and the coupling means 38 arranged on the first coupling part 20, a support extension 56 which is formed substantially perpendicular to the axis of rotation 22 and which is supported on the section 52. The pressure element 40 is arranged such that the pressure element 40 is supported at one end on the support extension 56 and at another end on the second coupling part 34. The support extension 56 has a bearing surface 58 for bearing the pressure element 40, which is formed substantially flat and substantially perpendicular to the axis of rotation 22. The first coupling part 20 comprises a support element 60 which, when arranged on the section 52, forms the support extension 56. The support element 60 or the support extension 56 is disc-shaped and extends, in particular in a
[0074] Page 17 of 26 31.10.2025 The condition arranged in section 52 extends radially outwards from an outer wall of section 52, wherein the pressure element 40 is arranged around section 52 and rests with one end against the support extension 56, in particular the bearing surface 58 of the support extension 56. The support element 60 is designed as an annular sheet metal part and has a form-flexible design. The support element 60 can be moved around section 52 by bending it. Section 52 forms a recess on its outer wall for the partial reception of the support element 60, wherein the support element 60 is positively locked to section 52 by its arrangement within the recess. Alternatively, it is conceivable that the support element 60 is attached to the first section 52 via a screw connection or is connected to the section 52 by pressing it on.
[0075] Alternatively, it is conceivable that the first coupling part 20 is essentially formed in one piece and includes at least one support extension 56, formed essentially perpendicular to the axis of rotation 22, for bearing pressure on the pressure element 40. It is conceivable that the support extension 56 is formed integrally with the first coupling part 20 or the section 52, or that it is arranged as a separate component on the first coupling part 20 or the section 52 and connected to the first coupling part 20 or the section 52.
[0076] The first coupling part 20 and the second coupling part 34 can each be designed as a single piece or as multiple pieces. Preferably, the first coupling part 20 and the second coupling part 34 are each designed such that, in a mounted state of the positioner device 10, in particular the coupling unit 14, the first coupling part 20 and the second coupling part 34 each act as a single component in a movement, wherein, in particular, the individual elements of the first coupling part 20 and the second coupling part 34 are positively, force-, and / or materially connected to one another and / or arranged so that they are immovable relative to each other.
[0077] The first coupling part 20 and the second coupling part 34 each have a contact surface 58, 62 for contact with the pressure element 40, wherein the contact surfaces 58, 62 and the coupling means 38 are each formed substantially concentrically around the axis of rotation 22. The contact surfaces 58, 62 each have a maximum diameter 64 along the axis of rotation 22, which is smaller than a minimum inner diameter 66 of the coupling means 38. The contact surface 58 of the first coupling part 20 is formed by the support element 60 or the support extension 56. The contact surface 62 of the second coupling part 34 is arranged within the receiving recess 50. The contact surfaces 58, 62 of the first coupling part 20 and the second coupling part 34 are each formed substantially perpendicular to the axis of rotation 22. The maximum diameter 64 of the contact surfaces 58, 62 extends essentially perpendicular to the axis of rotation 22.The contact surfaces 58, 62 are designed such that the maximum diameter 64 of the contact surfaces 58, 62 is the.
[0078] Page 18 of 26 31.10.2025
[0079] The axis of rotation 22 intersects at a single point. The inner diameter 66 of the coupling means 38 extends perpendicular to the axis of rotation 22. The coupling means 38 are designed such that their inner diameter 66 is essentially identical along the direction of rotation 42. The pressure element 40 is positioned closer to the axis of rotation 22 than the return element 36 and the coupling means 38. The second coupling part 34 is designed such that its contact surface 62 is located on a side facing away from the coupling means 38, and in particular from the further section 54 of the first coupling part 20.
[0080] The coupling means 38 of the first coupling part 20 are arranged at an outer edge region of the first coupling part 20, in particular of the further section 54, relative to the axis of rotation 22. The coupling means 38 of the second coupling part 34 are arranged at an outer edge region of the second coupling part 34, relative to the axis of rotation 22. The coupling means 38 each extend along the axis of rotation 22 to an outer contour of the coupling unit 14, in particular of the first coupling part 20 and the second coupling part 34. Preferably, the coupling means 38, in particular the individual teeth, each have a maximum radial extent 68 (see Figure 3) that corresponds to at least 5%, preferably at least 10%, and particularly preferably at least 15°, of a maximum diameter 70 of the coupling unit 14, in particular of the coupling part 20, 34 forming the respective coupling means 38.Preferably, the maximum radial extent 68 of the coupling means 38, in particular the individual teeth, is at most 25% of the maximum diameter 70 of the coupling unit 14, in particular of the coupling part 20, 34 forming the respective coupling means 38.
[0081] Figure 2 shows a schematic side view of the position sensor device 10, with the return element 36 hidden for clarity. Figure 3 shows a perspective view of the first coupling part 20, showing the teeth formed on the first coupling part 20. The coupling means 38, which are designed as teeth on the first coupling part 20 and on the second coupling part 34, are configured such that the smallest inclination angle 44 of the individual teeth corresponds to a value within an angular range between 15° and 65°. In particular, the smallest inclination angle 44 of the individual teeth is essentially 35°.The coupling means 38 are designed such that the inclination angle 44 of the individual teeth is essentially constant radially to the axis of rotation 22, wherein the width 74 of the individual teeth formed along the direction of rotation 42 around the axis of rotation 22 and the tooth height 76 of the individual teeth formed parallel to the axis of rotation 22 become smaller radially to the axis of rotation 22, in particular by a.
[0082] Page 19 of 26 31.10.2025 The aim is to ensure a uniform distribution of an equal number of gear teeth in the direction of rotation 42 around the axis of rotation 22 at the same inclination angle 44. The inclination angle 44 of each individual gear tooth extends from a fictitious plane perpendicular to the axis of rotation 22 to a tooth flank 72 of the respective gear tooth. Preferably, all coupling means 38 designed as gear teeth are essentially identical.
[0083] The first coupling part 20 and the second coupling part 34 are designed such that the coupling means 38, which are formed as teeth on the first coupling part 20 and on the second coupling part 34, each have substantially planar contact surfaces 78 when viewed radially to the axis of rotation 22. The teeth are each formed by a plurality of teeth, each tooth having two contact surfaces 78. The contact surfaces 78 form the sides of the teeth. The teeth extend substantially parallel to the axis of rotation 22 over a tooth height 76. The tooth height 76 forms the maximum axial extent of the individual teeth, in particular parallel to the axis of rotation 22. The contact surfaces 78 extend substantially completely over the tooth height 76, parallel to the axis of rotation 22.Preferably, the contact surfaces 78 extend substantially completely over the tooth height 76, with the exception of transition areas to adjacent contact surfaces 78 and / or an area around a tip. Each tooth comprises a tip bounded by two contact surfaces 78. The teeth have a curvature in the region of the tips. However, other configurations of the teeth, in particular of the teeth themselves, are also conceivable. The angle of inclination 44 (see Figure 2) corresponds to an angle between a hypothetical plane oriented perpendicular to the axis of rotation 22 and the individual contact surfaces 78 of the teeth. The tooth height 76 of the teeth decreases radially towards the axis of rotation 22.
[0084] Further alternative designs of the position transmitter device 10 are conceivable, which differ in the design of the individual components and / or in the arrangement of the components relative to each other.
[0085] Figure 4 shows an alternative embodiment of coupling means 38a of a position sensor device 10a. The position sensor device 10a shown in partial view in Figure 4 is essentially identical to the position sensor device 10 shown in Figures 1 to 3. A first coupling part 20a of the position sensor device 10a, shown in Figure 4, has coupling means 38a designed as teeth. In contrast to the coupling means 38 shown in Figures 1 to 3, the contact surfaces 78a of the individual teeth of the teeth are each uneven. The first coupling part 20a and also a second coupling part 34a (not shown in Figure 4) are designed such that the coupling means 38a, designed as teeth on the first coupling part 20a and on the second coupling part 34a, each have two
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[0087] The contact surfaces 78a together form a tooth, each contact surface 78a having a shape other than a flat surface, preferably uneven or curved. The first coupling part 20a and the second coupling part 38a are designed such that the teeth each have a substantially constant tooth height 76a radially to an axis of rotation 22a.
[0088] The toothing is formed by a plurality of teeth, each tooth having two contact surfaces 78a or being substantially formed by the two contact surfaces 78a. The toothing extends substantially parallel to the axis of rotation 22a substantially completely over the tooth height 76a. The contact surfaces 78a extend substantially completely over the tooth height 76a, except for transition areas to adjacent contact surfaces 78a. The teeth each comprise a tip bounded by two contact surfaces 78a. The toothing, and in particular the teeth, form a chamfer in the region of the tips when viewed radially to the axis of rotation 22a.The contact surfaces 78a each have a principal extent (shown by way of example in Figure 4) when viewed in a section plane oriented perpendicular to a radial direction to the axis of rotation 22a. This principal extent changes along the radial direction to the axis of rotation 22a by at least an angle 84a relative to the axis of rotation 22a. In particular, the angle 84a is a complementary angle to the inclination angle 44a (see also Figure 2). Preferably, the angle 84a of the principal extent of the individual contact surfaces 78a relative to the axis of rotation 22a decreases in the radial direction towards the axis of rotation 22a. The first coupling part 20a and the second coupling part 34a are designed such that the teeth each have a substantially decreasing tooth tip angle in the region of the tip in the radial direction towards the axis of rotation 22a. In contrast to Hirth couplings, such a design reduces wear of the teeth.The tooth height 76a forms the maximum axial extent of the individual teeth. The coupling means 38a are designed such that the tooth height 76a remains essentially constant radially to the axis of rotation 22a. An imaginary straight line running along one of the tips of the teeth of the gears is essentially perpendicular to the axis of rotation 22a and intersects the axis of rotation at a single point. The angle 84a of the contact surfaces 78a relative to the axis of rotation 22 is constant across the entire contact surface 78a at a constant distance from the axis of rotation 22a and changes with increasing distance from the axis of rotation 22a. In particular, the angle 84a of the contact surfaces 78a relative to the axis of rotation 22 decreases with decreasing distance from the axis of rotation 22a. Specifically, the teeth are designed such that the width 74a of the teeth decreases radially towards the axis of rotation 22a.
[0089] Page 21 of 26 31.10.2025
[0090] Reference sign
[0091] 10 Positioning device 48 Inner surface
[0092] 12 positioners 50 receiving recess
[0093] 14 coupling unit 52 section
[0094] 16 Transmission element 53 Stop
[0095] 18 Sensor unit 54 Further section
[0096] 20 First coupling part 56 Support extension
[0097] 22 Rotation axis 58 Application surface
[0098] 24 Sensor 60 Support element
[0099] 26 Magnet 62 Application surface
[0100] 28 Connection area 64 Diameter
[0101] 30 Housing 66 Radial spacing
[0102] 32 Support part 68 Radial extension
[0103] 34 Second coupling part 70 diameter
[0104] 36 Return element 72 Tooth flank
[0105] 38 coupling means 74 width
[0106] 40 pressure element 76 tooth height
[0107] 42 Direction of rotation 78 Contact area
[0108] 44° tilt angle 84° angle
[0109] 46 Guide section
[0110] Page 22 of 26
Claims
31. 10.2025 Claims 1. Positioning device for a position controller, comprising a coupling unit and at least one transmission element for transmitting a movement of an actuator of a valve to the coupling unit, wherein the at least one transmission element is configured such that the movement of the actuator is transmitted to the coupling unit as a rotational movement, wherein the coupling unit is provided for applying a restoring force to the transmission element, wherein the coupling unit comprises at least a first coupling part and at least a second coupling part, wherein the first coupling part is connected to the transmission element, and wherein the coupling unit comprises a restoring element for generating the restoring force, which applies the restoring force to the second coupling part.wherein the coupling unit comprises coupling means for an operative connection between the first coupling part and the second coupling part during movement about an axis of rotation of the coupling unit, characterized in that the first coupling part and the second coupling part are designed such that the coupling means are formed as toothings on the first coupling part and on the second coupling part that correspond to each other and act axially relative to the axis of rotation, wherein the first coupling part and the second coupling part are provided to bear against each other via the coupling means, particularly in a state unloaded by the transmission element, wherein the coupling unit comprises at least one clamping element.which applies a locking force to the first coupling part and / or the second coupling part in a region of the coupling means against a movement of the first coupling part and the second coupling part relative to each other that is essentially parallel to the axis of rotation.
2. Positioning device according to claim 1, characterized in that the first coupling part and the second coupling part are designed such that the coupling means are designed as a Hirth coupling between the first coupling part and the second coupling part. Page 23 of 26 31.10.2025 3. Positioning device according to claim 1, characterized in that the first coupling part and the second coupling part are designed such that the coupling means designed as teeth on the first coupling part and on the second coupling part each have two contact surfaces which together form a tooth or tooth, wherein the contact surfaces each have a design that differs from a flat surface, preferably uneven or curved.
4. Positioning device according to claim 3, characterized in that the first coupling part and the second coupling part are designed such that the teeth or prongs each have a substantially constant tooth height radially to the axis of rotation.
5. Positioning device according to one of the preceding claims, characterized in that the pressure element is designed as a compression spring and is supported at one end on the first coupling part and at another end on the second coupling part.
6. Positioning device according to one of the preceding claims, characterized by a housing-fixed support part, which is in particular part of the position controller, wherein the return element is designed as a torsion spring and is supported at one end on the support part and at another end on the second coupling part, wherein the second coupling part is provided to transmit the return force of the return element via the coupling means to the first coupling part and to the transmission element.
7. Positioning device according to one of the preceding claims, characterized in that the second coupling part defines a passage for a partial reception of the first coupling part, wherein the second coupling part is arranged such that the axis of rotation extends through the passage.
8. Positioning device according to one of the preceding claims, characterized in that the coupling means designed as teeth on the first coupling part and on the second coupling part are designed such that a smallest inclination angle of the individual teeth, which in particular extends from a fictitious plane extending perpendicular to the axis of rotation to a tooth flank of the respective tooth, corresponds to a value from an angular range between 15° and 65°. Page 24 of 26 31.10.2025 9. Positioning device according to one of the preceding claims, characterized in that the first coupling part is designed in multiple parts, wherein a section of the first coupling part is connected to the transmission element and extends along the axis of rotation, wherein a further section of the first coupling part is arranged behind the second coupling part, viewed from the transmission element along the axis of rotation, wherein a part of the coupling means designed as teeth, which are provided for interaction with the coupling means formed on the second coupling part, are formed on a side of the further section of the first coupling part facing the transmission element.
10. Positioning device according to one of the preceding claims, characterized in that the first coupling part is designed in multiple parts, wherein a section of the first coupling part is connected to the transmission element and extends along the axis of rotation, wherein the first coupling part, viewed along the axis of rotation, comprises at least one support extension formed substantially perpendicular to the axis of rotation between a connection area of the section for connection with the transmission element and the coupling means arranged on the first coupling part, which is supported on the section or is formed by the section, wherein the pressure element is arranged such that the pressure element is supported at one end on the support extension and at another end on the second coupling part.
11. Positioning device according to claim 5, characterized in that the first coupling part and the second coupling part each have a contact surface for the pressure element, wherein the contact surfaces and the coupling means are each formed substantially concentrically around the axis of rotation, wherein the contact surfaces, viewed along the axis of rotation, each have a maximum diameter that is smaller than a minimum inner diameter of the coupling means.
12. Positioner for a control valve with a positioner device according to one of the preceding claims. Page 25 of 26