USRE38882E1 - Angle measuring system with a clampable shaft - Google Patents
Angle measuring system with a clampable shaft Download PDFInfo
- Publication number
- USRE38882E1 USRE38882E1 US10/039,336 US3933601A USRE38882E US RE38882 E1 USRE38882 E1 US RE38882E1 US 3933601 A US3933601 A US 3933601A US RE38882 E USRE38882 E US RE38882E
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- Prior art keywords
- shaft
- measuring system
- angle measuring
- pick
- screw
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- 230000008878 coupling Effects 0.000 claims description 22
- 238000010168 coupling process Methods 0.000 claims description 22
- 238000005859 coupling reaction Methods 0.000 claims description 22
- 239000002184 metal Substances 0.000 claims description 5
- 230000001419 dependent effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
- G01D5/32—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light
- G01D5/34—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells
- G01D5/347—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells using displacement encoding scales
- G01D5/3473—Circular or rotary encoders
- G01D5/34738—Axles; Driving or coupling means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D1/00—Couplings for rigidly connecting two coaxial shafts or other movable machine elements
- F16D1/02—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for connecting two abutting shafts or the like
- F16D1/04—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for connecting two abutting shafts or the like with clamping hub; with hub and longitudinal key
- F16D1/05—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for connecting two abutting shafts or the like with clamping hub; with hub and longitudinal key with radial clamping due to axial loading of at least one pair of conical surfaces
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D1/00—Couplings for rigidly connecting two coaxial shafts or other movable machine elements
- F16D1/06—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end
- F16D1/08—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end with clamping hub; with hub and longitudinal key
- F16D1/09—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end with clamping hub; with hub and longitudinal key with radial clamping due to axial loading of at least one pair of conical surfaces
- F16D1/093—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end with clamping hub; with hub and longitudinal key with radial clamping due to axial loading of at least one pair of conical surfaces using one or more elastic segmented conical rings forming at least one of the conical surfaces, the rings being expanded or contracted to effect clamping
- F16D1/097—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end with clamping hub; with hub and longitudinal key with radial clamping due to axial loading of at least one pair of conical surfaces using one or more elastic segmented conical rings forming at least one of the conical surfaces, the rings being expanded or contracted to effect clamping with clamping effected by ring expansion only, e.g. with an expanded ring located between hub and shaft
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D1/00—Couplings for rigidly connecting two coaxial shafts or other movable machine elements
- F16D1/06—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end
- F16D1/08—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end with clamping hub; with hub and longitudinal key
- F16D1/09—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end with clamping hub; with hub and longitudinal key with radial clamping due to axial loading of at least one pair of conical surfaces
- F16D2001/0903—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end with clamping hub; with hub and longitudinal key with radial clamping due to axial loading of at least one pair of conical surfaces the clamped shaft being hollow
Definitions
- the present invention relates to an angle measuring system with a coding disk for measuring the angular position of a pick-up shaft having a clamping device for clamping the pick-up shaft, fixed against relative rotation, to a driveshaft of a drive unit.
- the pick-up shaft has axial slits in the clamping area and can be radially spread open by an actuating element.
- U.S. Pat. No. 4,652,748 discloses an angle step indicator. It consists of a housing in which a hollow shaft is rotatably seated. A coding disk for measuring the angular position of the shaft with respect to a scanning unit fastened to the housing is fastened on this shaft, fixed against relative rotation. One end of the shaft is slitted and has a conical interior bore on which the conical tip of a pin acts. The pin is axially displaceable by a screw inserted into the other end of the shaft so that the slitted end of the shaft is spread open.
- the shaft of the angle measuring system is radially clamped by this spreading open of the slitted end of the shaft in either a bore of an element of a shaft coupling or directly in a bore of a motor shaft.
- the shaft of the angle measuring device is connected with the driveshaft, for example a motor shaft, by a shaft coupling.
- a similar angle measuring device is described in German Patent Publication No. DE 30 38 005 A1.
- the shaft end facing the drive unit is also slitted.
- This shaft end can be spread open by a wedge.
- the wedge has an interior thread which works together with the exterior thread of a screw.
- the head of the screw is supported on the shaft end, so that the screw itself is not axially displaceable.
- the thread flanks of the screw are displaced in the axial direction by turning the screw, which causes an axial displacement of the wedge and thus radial spreading of the slitted shaft end.
- an angle measuring system having a coding disk for measuring the angular position of a pick-up shaft and a clamping device for clamping the pick-up shaft, fixed against relative rotation, to a driveshaft of a drive unit.
- the pick-up shaft has axial slits in the clamping area which can be radially spread open by an actuating element.
- the system includes a screw being the actuating element which can be turned in the pick-up shaft and which has an exterior thread in the clamping area, and a corresponding interior thread on the pick-up shaft in the clamping area.
- the screw has an axially acting detent surface which is supported against an axial detent of the pick-up shaft during clamping.
- FIG. 1 illustrates a cross-sectional view of an angle measuring system according to a preferred embodiment of the present invention.
- FIG. 2 illustrates an exploded view of a portion of the measuring system shown in FIG. 1 which illustrates the principle of operation of the shaft clamping according to a preferred embodiment of the present invention.
- FIG. 3 is a vector representation of the forces shown in FIG. 2 .
- the angle measuring system shown in FIG. 1 includes a stator 1 , a pick-up shaft 2 , a coding disk 3 , a scanning unit 4 , a coupling 5 , and a stationary element 6 of a drive unit, for example, a motor.
- the pick-up shaft 2 is preferably continuously hollow and is rotatably seated in the stator 1 .
- the coding disk 3 is fastened to a first end of the pick-up shaft 2 by glue, for example.
- an incremental or absolute coding is placed on the coding disk 3 .
- the coding disk 3 is scanned by the scanning unit 4 which emits position-dependent electrical signals as is well known to those of ordinary skill in the art and thus need not be described in detail herein.
- the stator 1 is fastened by coupling 5 to the stationary element 6 .
- the coupling 5 assures a connection, fixed against relative rotation, of the stator 1 and the stationary element 6 , but permits compensating movements between these two elements in all directions.
- the coupling 5 is especially rigid and free of play in the direction of rotation.
- the coupling 5 consists of a spring sheet metal plate with several leaf spring arms 51 and 52 .
- Each leaf spring arm 51 , 52 has axially extending areas 53 , 54 , which are substantially parallel with the pick-up shaft 2 and radial areas 55 , 56 extending perpendicularly to the pick-up shaft 2 .
- the axially extending areas 53 , 54 form a spring parallelogram and permit radial compensation movements between the stator 1 and the stationary element 6 which occur, inevitably because of eccentricities between the stator 1 and the stationary element 6 .
- the radially extending areas 55 , 56 permit axial compensation movements between the stator 1 and the stationary element 6 .
- Such a coupling has been described, for example, in German Patent Publication No. DE 89 15 109 U1.
- the second end of the pick-up shaft 2 operates as a clamping device 100 which is located opposite of the first end on which the coding disk 3 is coupled and which faces the stationary element 6 .
- a portion of the second end/clamping device defines a clamping area 102 that operates as a clamping element 104 that has axially extending slits 7 and an interior thread 8 .
- a screw 11 is used to spread the slitted area of the pick-up shaft open. More particularly, the screw 11 has an exterior thread 12 on one end and a head 13 on an opposite end. Starting at the first end of the pick-up shaft 2 , the screw 11 is turned into the hollow pick-up shaft 2 until the screw's radially extending surface 14 is supported at a shoulder having a radially extending surface 15 of the pick-up shaft 2 . The surfaces 14 and 15 form an axially effective detent up to which the screw 11 can be turned into the pick-up shaft 2 . As shown in FIG. 1 , the exterior thread 12 is inserted into an opening 106 that is formed, at least in part by the clamping element 104 .
- the screw 11 is further turned moved by turning the screw 11 with relation to the pick-up shaft 2 , the thread flanks of the exterior threads 12 of the screw 11 and the interior threads 8 of the pick-up shaft 2 each directly cause the slit end and the slits 7 of the pick-up shaft 2 to spread open.
- means 16 can be provided on the pick-up shaft 2 with which the pick-up shaft 2 is held, fixed again relative rotation, when the screw 11 is turned.
- These means 16 can be specially shaped recesses on the pick-up shaft 2 , which are accessible to a tool. This tool can be hand-held during assembly, but can also be designed such that it automatically causes clamping between the pick-up shaft 2 and the stator 1 during the assembly of the two shafts 2 and 9 .
- a set of pick-up holes for use with a spanner wrench or a set of flats for use with an open-end or box end wrench could be used.
- FIG. 2 illustrates an exploded view of a portion of the measuring system shown in FIG. 1 which illustrates the principle operation of the shaft clamping according to a preferred embodiment of the present invention.
- the force F 2 created by the longitudinal force on screw 11 has an equal and opposite force F 2 ′ created by the resistance of the pick-up shaft, threads. These two forces attempt to force the slotted portion of the pick-shaft away from the screw but this motion is constrained by the surface of the bore 10 in driveshaft 9 .
- the surfaces 14 and 15 of the screw 12 and shaft 2 respectively constitute an axially acting detect, up to which the screw 11 can be turned into the pick-up shaft 2 Furthermore, the touching surfaces 14 , 15 form relatively large friction surfaces in the clamped state of the pick-up shaft 2 , which are located on a relatively large radius, so that a large unscrewing moment is achieved on account of the friction. This has the advantage that the clamping will not automatically loosened during operation.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Transmission And Conversion Of Sensor Element Output (AREA)
- Transmission Devices (AREA)
- A Measuring Device Byusing Mechanical Method (AREA)
Abstract
The angular measuring system has a hollow pick-up shaft whose end is slitted, and the slitted area has an interior thread. A screw with an exterior thread is provided for clamping the pick-up shaft in a bore of a driveshaft. The screw is turned into the pick-up shaft until it is axially supported on a detent. By further turning of the screw the thread flanks of the interior thread and of the exterior thread cause the slit end of the pick-up shaft to be spread open radially.
Description
The present invention relates to an angle measuring system with a coding disk for measuring the angular position of a pick-up shaft having a clamping device for clamping the pick-up shaft, fixed against relative rotation, to a driveshaft of a drive unit. The pick-up shaft has axial slits in the clamping area and can be radially spread open by an actuating element.
U.S. Pat. No. 4,652,748 discloses an angle step indicator. It consists of a housing in which a hollow shaft is rotatably seated. A coding disk for measuring the angular position of the shaft with respect to a scanning unit fastened to the housing is fastened on this shaft, fixed against relative rotation. One end of the shaft is slitted and has a conical interior bore on which the conical tip of a pin acts. The pin is axially displaceable by a screw inserted into the other end of the shaft so that the slitted end of the shaft is spread open. The shaft of the angle measuring system is radially clamped by this spreading open of the slitted end of the shaft in either a bore of an element of a shaft coupling or directly in a bore of a motor shaft. In every case the shaft of the angle measuring device is connected with the driveshaft, for example a motor shaft, by a shaft coupling.
A similar angle measuring device is described in German Patent Publication No. DE 30 38 005 A1. In this example the shaft end facing the drive unit is also slitted. This shaft end can be spread open by a wedge. The wedge has an interior thread which works together with the exterior thread of a screw. The head of the screw is supported on the shaft end, so that the screw itself is not axially displaceable. The thread flanks of the screw are displaced in the axial direction by turning the screw, which causes an axial displacement of the wedge and thus radial spreading of the slitted shaft end.
All known measuring systems have the disadvantage that, in addition to the screw, other elements, are still required for spreading.
It is thus desirable to provide an angle measuring system with a clampable shaft with relatively fewer elements then known systems and which is simple to implement.
According to a first aspect of the present invention there is provided an angle measuring system having a coding disk for measuring the angular position of a pick-up shaft and a clamping device for clamping the pick-up shaft, fixed against relative rotation, to a driveshaft of a drive unit. The pick-up shaft has axial slits in the clamping area which can be radially spread open by an actuating element. The system includes a screw being the actuating element which can be turned in the pick-up shaft and which has an exterior thread in the clamping area, and a corresponding interior thread on the pick-up shaft in the clamping area. The screw has an axially acting detent surface which is supported against an axial detent of the pick-up shaft during clamping.
It is an object of the invention to disclose an angle measuring system which is simply constructed and which makes possible a dependable and simple clamping of the shaft with a driveshaft.
The invention will be explained in more detail with reference to the Figures and detailed description of the presently preferred embodiments.
The angle measuring system shown in FIG. 1 includes a stator 1, a pick-up shaft 2, a coding disk 3, a scanning unit 4, a coupling 5, and a stationary element 6 of a drive unit, for example, a motor. The pick-up shaft 2 is preferably continuously hollow and is rotatably seated in the stator 1. The coding disk 3 is fastened to a first end of the pick-up shaft 2 by glue, for example. In a preferred embodiment an incremental or absolute coding is placed on the coding disk 3. The coding disk 3 is scanned by the scanning unit 4 which emits position-dependent electrical signals as is well known to those of ordinary skill in the art and thus need not be described in detail herein.
The stator 1 is fastened by coupling 5 to the stationary element 6. The coupling 5 assures a connection, fixed against relative rotation, of the stator 1 and the stationary element 6, but permits compensating movements between these two elements in all directions. The coupling 5 is especially rigid and free of play in the direction of rotation. In a preferred embodiment the coupling 5 consists of a spring sheet metal plate with several leaf spring arms 51 and 52. Each leaf spring arm 51, 52 has axially extending areas 53, 54, which are substantially parallel with the pick-up shaft 2 and radial areas 55, 56 extending perpendicularly to the pick-up shaft 2. The axially extending areas 53, 54 form a spring parallelogram and permit radial compensation movements between the stator 1 and the stationary element 6 which occur, inevitably because of eccentricities between the stator 1 and the stationary element 6. The radially extending areas 55, 56 permit axial compensation movements between the stator 1 and the stationary element 6. Such a coupling has been described, for example, in German Patent Publication No. DE 89 15 109 U1.
The second end of the pick-up shaft 2 operates as a clamping device 100 which is located opposite of the first end on which the coding disk 3 is coupled and which faces the stationary element 6. A portion of the second end/clamping device defines a clamping area 102 that operates as a clamping element 104 that has axially extending slits 7 and an interior thread 8. If the pick-up shaft 2 is to be connected, fixed against relative rotation, with a driveshaft 9 located in the stationary element 6, the slitted second end of the pick-up shaft 2 is pushed into a bore 10 located in the driveshaft 9 and the slitted area of the pick-up shaft is spread open radially which achieves a rigid radial clamping. A screw 11 is used to spread the slitted area of the pick-up shaft open. More particularly, the screw 11 has an exterior thread 12 on one end and a head 13 on an opposite end. Starting at the first end of the pick-up shaft 2, the screw 11 is turned into the hollow pick-up shaft 2 until the screw's radially extending surface 14 is supported at a shoulder having a radially extending surface 15 of the pick-up shaft 2. The surfaces 14 and 15 form an axially effective detent up to which the screw 11 can be turned into the pick-up shaft 2. As shown in FIG. 1 , the exterior thread 12 is inserted into an opening 106 that is formed, at least in part by the clamping element 104.
If, after reaching the shoulder of the pick-up shaft 2, the screw 11 is further turned moved by turning the screw 11 with relation to the pick-up shaft 2, the thread flanks of the exterior threads 12 of the screw 11 and the interior threads 8 of the pick-up shaft 2 each directly cause the slit end and the slits 7 of the pick-up shaft 2 to spread open.
If twisting of the coding disk 3 is to be avoided during the clamping operation between the pick-up shaft 2 and the driveshaft 9, means 16 can be provided on the pick-up shaft 2 with which the pick-up shaft 2 is held, fixed again relative rotation, when the screw 11 is turned. These means 16 can be specially shaped recesses on the pick-up shaft 2, which are accessible to a tool. This tool can be hand-held during assembly, but can also be designed such that it automatically causes clamping between the pick-up shaft 2 and the stator 1 during the assembly of the two shafts 2 and 9. For example, a set of pick-up holes for use with a spanner wrench or a set of flats for use with an open-end or box end wrench could be used. Alternatively, it may also be possible to make a wrench that fits like a cap over the top of the encoder to allow the locking of the pick-up shaft 2 as discussed above as well as engaging a similar feature or fixation point on the outside body of the stator 1. Such a configuration would allow the use of automated tooling.
If the screw 11 has been turned into the pick-up shaft 2 up to the detect 14, 15, the surface 14 of the screw head 13 is pressed against the surface 15 of the pick-up shaft 2. With further turning of the screw 11 a longitudinal force of tension F1 appears at the thread flanks 12 of the screw 11. (FIG. 2 ) The thread flanks 12 are inclined at an angle θ, for example 30°, to the force F1, which results in components of this force being developed both normal and parallel to the contact surface 17 defined by the exterior threads 12 of the screw 11 and interior threads 8 of the pick-up shaft 2.
The force F1 has component F1 sin θ normal to surface 17, and F1 cos θ parallel to surface 17. (See FIG. 3). Similarly, the force F1 cos θ has component F2=F1 cos θ sin θ which is at right angles to F1. The force F2 created by the longitudinal force on screw 11 has an equal and opposite force F2′ created by the resistance of the pick-up shaft, threads. These two forces attempt to force the slotted portion of the pick-shaft away from the screw but this motion is constrained by the surface of the bore 10 in driveshaft 9.
The surfaces 14 and 15 of the screw 12 and shaft 2, respectively constitute an axially acting detect, up to which the screw 11 can be turned into the pick-up shaft 2 Furthermore, the touching surfaces 14, 15 form relatively large friction surfaces in the clamped state of the pick-up shaft 2, which are located on a relatively large radius, so that a large unscrewing moment is achieved on account of the friction. This has the advantage that the clamping will not automatically loosened during operation.
It is to be understood that the forms of the invention described herewith are to be taken as preferred embodiments and that various charges in the shape, size and arrangement of parts may be resorted to, without departing from the spirit of the invention or the scope of the claims.
Claims (38)
1. An angle measuring system having a coding disk for measuring the angular position of a pick-up shaft and a clamping device for clamping the pick-up shaft, fixed against relative rotation, to a driveshaft of a drive unit, wherein the pick-up shaft has axial slits in the clamping area which can be radially spread open by an actuating element, the system comprising:
a screw being the actuating element which can be turned in the pick-up shaft and which has an exterior thread in the clamping area; and
a corresponding interior thread on the pick-up shaft in the clamping area, wherein the screw has an axially acting detent surface which it is supported against an axial detent of the pick-up shaft during clamping.
2. The angle measuring system according to claim 1 wherein the screw is guided through the pick-up shaft from the an end opposite the driveshaft, and the an end of the pick-up shaft facing the driveshaft has the slits.
3. The angle measuring system according to claim 1 wherein the pick-up shaft is rotatably seated in a stator of the angle measuring system, and the stator is connected with the a stationary element of the drive unit by a coupling in a manner fixed against relative torsion, but radially and axially resilient.
4. The angle measuring system according to claim 3 wherein the coupling is made of spring sheet metal with spring arms extending axially and parallel with each other and constitute a parallel guide which is fixed against relative torsion.
5. The angle measuring system of claim 1 , wherein said actuating element is a unitary member.
6. The angle measuring system of claim 1 , wherein said actuating element moves in a helical manner when operative.
7. An angle measuring system comprising a coding disk for measuring the angular position of a pick-up shaft and a clamping device for clamping the pick-up shaft, fixed against relative rotation, to a driveshaft of a drive unit, and a clamping element comprising a slit in a clamping area, the system comprising:
an actuating element that directly contacts said pick-up shaft and is operative to directly spread said slit when rotated within said pick-up shaft.
8. The angle measuring system of claim 7 , wherein said actuating element comprises a screw that is turned in said pick-up shaft.
9. The angle measuring system of claim 8 , wherein said screw comprises an exterior thread in said clamping area.
10. The angle measuring system of claim 9 , wherein said pick-up shaft comprises an interior thread that corresponds to said exterior thread.
11. The angle measuring system of claim 8 , wherein said screw comprises an axially acting detent surface that is supported against an axial detent of said pick-up shaft during clamping.
12. The angle measuring system of claim 8 , wherein said screw is guided through said pick-up shaft from an end opposite said driveshaft, and an end of said pick-up shaft facing said driveshaft has said slit.
13. The angle measuring system of claim 7 , wherein said pick-up shaft is rotatably seated in a stator of said angle measuring system, and said stator is connected with a stationary element of said drive unit by a coupling in a manner fixed against relative torsion, but radially and axially resilient.
14. The angle measuring system of claim 13 , wherein said coupling is made of spring sheet metal.
15. The angle measuring system of claim 13 , wherein said coupling comprises spring arms extending axially and parallel with each other and comprise a parallel guide which is fixed against relative torsion.
16. The angle measuring system of claim 14 , wherein said coupling comprises spring arms extending axially and parallel with each other and comprise a parallel guide which is fixed against relative torsion.
17. The angle measuring system of claim 7 , wherein said actuating element is a unitary member.
18. The angle measuring system of claim 7 , wherein said actuating element moves in a helical manner when operative.
19. An angle measuring system comprising a coding disk for measuring the angular position of a pick-up shaft, the system comprising:
an actuating element;
a clamping element comprising a slit adjacent to said actuating element, said clamping element defining, at least in part, an opening in which said actuating element is inserted, wherein movement of said actuating element with respect to said slit causes said slit to radially spread open so that said pick-up shaft and a drive shaft engage one another so as to be fixed against relative rotation.
20. The angle measuring system of claim 19 , wherein said actuating element comprises a screw that is turned in said pick-up shaft.
21. The angle measuring system of claim 20 , wherein said screw comprises an exterior thread in said clamping area.
22. The angle measuring system of claim 21 , wherein said pick-up shaft comprises an interior thread that corresponds to said exterior thread.
23. The angle measuring system of claim 20 , wherein said screw comprises an axially acting detent surface that is supported against an axial detent of said pick-up shaft during clamping.
24. The angle measuring system of claim 20 , wherein said screw is guided through said pick-up shaft from an end opposite said driveshaft, and an end of said pick-up shaft facing said driveshaft has said slit.
25. The angle measuring system of claim 19 , wherein said pick-up shaft is rotatably seated in a stator of said angle measuring system, and said stator is connected with a stationary element of said drive unit by a coupling in a manner fixed against relative torsion, but radially and axially resilient.
26. The angle measuring system of claim 25 , wherein said coupling is made of spring sheet metal.
27. The angle measuring system of claim 25 , wherein said coupling comprises spring arms extending axially and parallel with each other and comprise a parallel guide which is fixed against relative torsion.
28. The angle measuring system of claim 26 , wherein said coupling comprises spring arms extending axially and parallel with each other and comprise a parallel guide which is fixed against relative torsion.
29. The angle measuring system of claim 19 , wherein said actuating element is a unitary member.
30. The angle measuring system of claim 19 , wherein said actuating element moves in a helical manner when operative.
31. An angle measuring system comprising a coding disk for measuring the angular position of a pick-up shaft and a clamping device fixed against relative rotation relative to a drive shaft of a drive unit, wherein said clamping device comprising an axial slit in a clamping area that is radially spread open by an actuating element, the system comprising:
a screw comprising an exterior thread in said clamping area, wherein when said screw is turned said axial slit radially spreads open; and
said clamping device comprises an interior thread in said clamping area that corresponds to said exterior thread.
32. The angle measuring system of claim 31 , wherein said screw comprises an axially acting detent surface that is supported against an axial detent during clamping.
33. The angle measuring system of claim 31 , wherein said screw is guided through said pick-up shaft from an end opposite said driveshaft, and an end of said pick-up shaft facing said driveshaft has said slit.
34. The angle measuring system of claim 31 , wherein said pick-up shaft is rotatably seated in a stator of said angle measuring system, and said stator is connected with a stationary element of said drive unit by a coupling in a manner fixed against relative torsion, but radially and axially resilient.
35. The angle measuring system of claim 34 , wherein said coupling is made of spring sheet metal.
36. The angle measuring system of claim 34 , wherein said coupling comprises spring arms extending axially and parallel with each other and comprise a parallel guide which is fixed against relative torsion.
37. The angle measuring system of claim 35 , wherein said coupling comprises spring arms extending axially and parallel with each other and comprise a parallel guide which is fixed against relative torsion.
38. The angle measuring system of claim 31 , wherein said actuating element moves in a helical manner when operative.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/039,336 USRE38882E1 (en) | 1997-09-15 | 2001-10-29 | Angle measuring system with a clampable shaft |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/929,539 US5981940A (en) | 1997-09-15 | 1997-09-15 | Angle measuring system with a clampable shaft |
US10/039,336 USRE38882E1 (en) | 1997-09-15 | 2001-10-29 | Angle measuring system with a clampable shaft |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US08/929,539 Reissue US5981940A (en) | 1997-09-15 | 1997-09-15 | Angle measuring system with a clampable shaft |
Publications (1)
Publication Number | Publication Date |
---|---|
USRE38882E1 true USRE38882E1 (en) | 2005-11-22 |
Family
ID=25458017
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US08/929,539 Ceased US5981940A (en) | 1997-09-15 | 1997-09-15 | Angle measuring system with a clampable shaft |
US10/039,336 Expired - Fee Related USRE38882E1 (en) | 1997-09-15 | 2001-10-29 | Angle measuring system with a clampable shaft |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US08/929,539 Ceased US5981940A (en) | 1997-09-15 | 1997-09-15 | Angle measuring system with a clampable shaft |
Country Status (3)
Country | Link |
---|---|
US (2) | US5981940A (en) |
EP (1) | EP0902256B1 (en) |
DE (1) | DE59813578D1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108731709A (en) * | 2018-05-02 | 2018-11-02 | 嘉兴市锐鹰传感技术有限公司 | A kind of Split encoder and installation method of integral type installation |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5981940A (en) | 1997-09-15 | 1999-11-09 | Renco Encoders, Inc. | Angle measuring system with a clampable shaft |
DE19836003A1 (en) | 1998-08-08 | 2000-02-10 | Heidenhain Gmbh Dr Johannes | Method for mounting a position measuring device and positioning means for mounting |
DE19904471B4 (en) | 1999-02-04 | 2011-03-31 | Dr. Johannes Heidenhain Gmbh | encoders |
DE19907326B4 (en) | 1999-02-20 | 2013-04-04 | Dr. Johannes Heidenhain Gmbh | angle measurement |
DE10022555A1 (en) * | 2000-05-10 | 2001-11-15 | Heidenhain Gmbh Dr Johannes | Angle measuring device |
DE10023196C2 (en) * | 2000-05-11 | 2003-04-03 | Orenstein & Koppel Ag | Device for detecting the angle of rotation between two components |
US6530715B1 (en) * | 2000-11-08 | 2003-03-11 | Inventio Ag | Nonconductive extension for electric motor shaft |
US6642508B2 (en) | 2001-08-31 | 2003-11-04 | Renco Encoders, Inc. | System and method in an angle measuring system with an encoder attachment system for attaching an encoder to a motor shaft through the use of a spring generating a radial pressure |
DE10216376B4 (en) * | 2002-04-12 | 2005-08-25 | Sick Stegmann Gmbh | Rotation angle measuring system |
US7296810B2 (en) * | 2004-04-01 | 2007-11-20 | Cnh America Llc | Apparatus and method for installing a sensor in connection with relatively movable members for sensing relative position thereof without adjustment |
EP2905582B1 (en) * | 2014-02-11 | 2016-10-05 | Dr. Johannes Heidenhain GmbH | Pre-assembled angle measuring device |
EP3150876A1 (en) * | 2015-09-29 | 2017-04-05 | Siemens Aktiengesellschaft | Encoder fixing for fixing an encoder to a drive shaft and method |
DE102017207239A1 (en) * | 2017-04-28 | 2018-10-31 | Volkswagen Aktiengesellschaft | Sensor arrangement for detecting the rotational speed of a transmission input shaft |
DE102021201717A1 (en) | 2021-02-24 | 2022-08-25 | Volkswagen Aktiengesellschaft | Resolver with constant measuring gap and electric machine system |
Citations (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2354902A1 (en) | 1973-11-02 | 1975-05-07 | Heidenhain Gmbh Dr Johannes | Split collar type hub clamp - for fixing a component to a rotary shaft |
DE2448239A1 (en) | 1974-10-09 | 1976-04-15 | Georg Prof Seewang | Easily mounted optical absolute angle measurement transducer - depends on friction coupling to the shaft concerned with spring adjustment for easy mounting |
US4031441A (en) | 1974-06-07 | 1977-06-21 | Vactric Control Equipment Limited | Optical encoder |
DE3038005A1 (en) | 1980-10-08 | 1982-05-06 | Zinser Textilmaschinen Gmbh, 7333 Ebersbach | Rotating machine with built-in tachometer - eliminates unwanted axial and radial motion between stator and rotor |
US4652748A (en) | 1984-07-27 | 1987-03-24 | Max Stegmann Gmbh Uhren- Und Elektroapparatefabrik | Adjusting device for angle step indicator |
US4660288A (en) | 1985-08-01 | 1987-04-28 | Johannes Heidenhain Gmbh | Coupling device |
US4759218A (en) | 1985-12-18 | 1988-07-26 | Heidelberger Druckmaschinen Ag | Tachogenerator |
US4806752A (en) | 1986-12-10 | 1989-02-21 | Dr. Johannes Heidenhain Gmbh | Incremental or absolute rotation encoder with a clamping device |
JPS6484015A (en) | 1987-09-25 | 1989-03-29 | Nippon Kokan Kk | Fire grate for refuse incinerator |
DE8915109U1 (en) | 1989-12-23 | 1990-02-22 | Dr. Johannes Heidenhain Gmbh, 83301 Traunreut | coupling |
US5758427A (en) * | 1995-09-06 | 1998-06-02 | Dr. Johannes Heidenhain Gmbh | Angular-position measuring device having a mounting element for torsion-proof mounting of a stator to a stationary object |
US5981940A (en) | 1997-09-15 | 1999-11-09 | Renco Encoders, Inc. | Angle measuring system with a clampable shaft |
US6311402B1 (en) | 1999-02-04 | 2001-11-06 | Dr. Johannes Heidenhain Gmbh | Rotary transducer |
-
1997
- 1997-09-15 US US08/929,539 patent/US5981940A/en not_active Ceased
-
1998
- 1998-07-14 DE DE59813578T patent/DE59813578D1/en not_active Expired - Lifetime
- 1998-07-14 EP EP98113081A patent/EP0902256B1/en not_active Expired - Lifetime
-
2001
- 2001-10-29 US US10/039,336 patent/USRE38882E1/en not_active Expired - Fee Related
Patent Citations (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2354902A1 (en) | 1973-11-02 | 1975-05-07 | Heidenhain Gmbh Dr Johannes | Split collar type hub clamp - for fixing a component to a rotary shaft |
US4031441A (en) | 1974-06-07 | 1977-06-21 | Vactric Control Equipment Limited | Optical encoder |
DE2448239A1 (en) | 1974-10-09 | 1976-04-15 | Georg Prof Seewang | Easily mounted optical absolute angle measurement transducer - depends on friction coupling to the shaft concerned with spring adjustment for easy mounting |
DE3038005A1 (en) | 1980-10-08 | 1982-05-06 | Zinser Textilmaschinen Gmbh, 7333 Ebersbach | Rotating machine with built-in tachometer - eliminates unwanted axial and radial motion between stator and rotor |
US4652748A (en) | 1984-07-27 | 1987-03-24 | Max Stegmann Gmbh Uhren- Und Elektroapparatefabrik | Adjusting device for angle step indicator |
US4660288A (en) | 1985-08-01 | 1987-04-28 | Johannes Heidenhain Gmbh | Coupling device |
US4759218A (en) | 1985-12-18 | 1988-07-26 | Heidelberger Druckmaschinen Ag | Tachogenerator |
US4806752A (en) | 1986-12-10 | 1989-02-21 | Dr. Johannes Heidenhain Gmbh | Incremental or absolute rotation encoder with a clamping device |
JPS6484015A (en) | 1987-09-25 | 1989-03-29 | Nippon Kokan Kk | Fire grate for refuse incinerator |
DE8915109U1 (en) | 1989-12-23 | 1990-02-22 | Dr. Johannes Heidenhain Gmbh, 83301 Traunreut | coupling |
US5758427A (en) * | 1995-09-06 | 1998-06-02 | Dr. Johannes Heidenhain Gmbh | Angular-position measuring device having a mounting element for torsion-proof mounting of a stator to a stationary object |
US5981940A (en) | 1997-09-15 | 1999-11-09 | Renco Encoders, Inc. | Angle measuring system with a clampable shaft |
US6311402B1 (en) | 1999-02-04 | 2001-11-06 | Dr. Johannes Heidenhain Gmbh | Rotary transducer |
Non-Patent Citations (1)
Title |
---|
Pending Patent Application Assigned to Renco Encoders: U.S. Appl. No.: 09/944,639, filed: Aug. 31, 2001, Inventor: Setbacken et al. |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108731709A (en) * | 2018-05-02 | 2018-11-02 | 嘉兴市锐鹰传感技术有限公司 | A kind of Split encoder and installation method of integral type installation |
Also Published As
Publication number | Publication date |
---|---|
DE59813578D1 (en) | 2006-07-20 |
EP0902256A2 (en) | 1999-03-17 |
EP0902256B1 (en) | 2006-06-07 |
EP0902256A3 (en) | 2002-05-22 |
US5981940A (en) | 1999-11-09 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
FPAY | Fee payment |
Year of fee payment: 8 |
|
AS | Assignment |
Owner name: HEIDENHAIN CORPORATION, ILLINOIS Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:RENCO ENCODERS, INC.;REEL/FRAME:023741/0880 Effective date: 20100104 |
|
REMI | Maintenance fee reminder mailed | ||
LAPS | Lapse for failure to pay maintenance fees |