CN216542850U - High-precision corner sensor measuring clamp - Google Patents
High-precision corner sensor measuring clamp Download PDFInfo
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- CN216542850U CN216542850U CN202122621935.XU CN202122621935U CN216542850U CN 216542850 U CN216542850 U CN 216542850U CN 202122621935 U CN202122621935 U CN 202122621935U CN 216542850 U CN216542850 U CN 216542850U
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Abstract
The utility model discloses a high-precision clamp for measuring a corner sensor, wherein the sensor comprises a shell and a rotating shaft, and the clamp comprises a coaxial adjusting mechanism, a two-degree-of-freedom translation mechanism and a pitching adjusting mechanism which are sequentially arranged from top to bottom; the rotating shaft is connected with an external power main shaft, and the power main shaft can drive the rotating shaft to rotate; the coaxial adjusting mechanism is connected with the shell and can adjust the position of the rotating shaft in a horizontal plane to enable the rotating shaft to be coaxial with the power main shaft; the two-degree-of-freedom translation mechanism is connected with the coaxial adjusting mechanism, and can enable the shell to move in a plane along with the rotating shaft so as to translate without relative rotation; the pitching adjusting mechanism can adjust the pitching angle of the rotating shaft. The utility model can effectively solve various problems of eccentricity, tower difference, rotation interference and the like caused by direct fixation during the measurement of the sensor, thereby improving the measurement accuracy of the sensor.
Description
Technical Field
The utility model relates to the technical field of sensor measurement and calibration, in particular to a high-precision clamp for measuring a corner sensor.
Background
When calibrating a rotation angle sensor such as an angle encoder, a rotating shaft or a rotor of the rotation angle sensor is generally coaxially connected to a rotating motion providing component such as a motor and a rotary table, and a housing or a stator of the rotation angle sensor is further fixed on a rigid fixed component, so that relative rotation between the rotating shaft and the housing or between the stator and the rotor is realized, and a rotation indication value of the rotation angle sensor is calibrated by adopting a standard with higher precision level. The standards of higher precision grades (such as:) include high precision encoders, rotary tables, multi-tooth indexing tables, or regular polygonal prisms.
Because pivot (or active cell) and shell (stator) need certain coaxial position relation just can realize normal work, and both need carry out rigid fixation respectively when measuring, original coaxial position relation can change when this fixed in-process can lead to pivot and shell relative rotation because of reasons such as the positional deviation of connecting piece, clamp force, influences measurement accuracy, can destroy the sensor when serious. Although individual high-precision sensors provide a margin for misalignment during design and manufacture, the effect of this need to be reduced during sensor mounting during measurement calibration, further improving measurement accuracy.
SUMMERY OF THE UTILITY MODEL
In view of the above, it is necessary to provide a jig for measuring a rotation angle sensor with high measurement accuracy and high accuracy.
A high-precision clamp for measuring a corner sensor comprises a shell and a rotating shaft, and the clamp comprises a coaxial adjusting mechanism, a two-degree-of-freedom translation mechanism and a pitching adjusting mechanism which are sequentially arranged from top to bottom;
the rotating shaft is connected with an external power main shaft, and the power main shaft can drive the rotating shaft to rotate;
the coaxial adjusting mechanism is connected with the shell and can adjust the position of the rotating shaft in a horizontal plane to enable the rotating shaft to be coaxial with the power main shaft;
the two-degree-of-freedom translation mechanism is connected with the shell, and can enable the shell to translate along with the movement of the rotating shaft in a plane without generating relative rotation;
the pitching adjusting mechanism can adjust the pitching angle of the rotating shaft.
In one embodiment, the pitch adjustment mechanism is fixed to an external fixed component.
In one embodiment, the two-degree-of-freedom translation mechanism comprises an upper connecting piece, a middle sliding piece and a lower connecting piece, the upper connecting piece is connected with the shell, the rotating shaft sequentially and movably penetrates through the upper connecting piece, the middle sliding piece and the lower connecting piece, the middle sliding piece is respectively in sliding connection with the upper connecting piece and the lower connecting piece, and the sliding direction of the middle sliding piece is perpendicular to that of the upper connecting piece and the lower connecting piece.
In one embodiment, a first groove is formed in the middle of the bottom of the upper connecting piece, a second groove is formed in the middle of the top of the lower connecting piece, a first strip-shaped sliding block and a second strip-shaped sliding block are respectively arranged on the upper side and the lower side of the middle sliding piece, the first strip-shaped sliding block is matched with the first groove, and the second strip-shaped sliding block is matched with the second groove;
first sliding grooves are symmetrically formed in the bottom of the upper connecting piece and located on two sides of the first groove, two first springs are arranged in the first sliding grooves, and one ends of the two first springs are connected with the bottom of the first sliding grooves respectively;
second sliding grooves are symmetrically formed in the upper portion of the lower connecting piece and located on two sides of the second groove, two second springs are arranged in the second sliding grooves, and one ends of the two second springs are connected with the bottoms of the second sliding grooves respectively;
the upper surface and the lower surface of the middle sliding part are respectively provided with two first connecting hooks and two second connecting hooks, the two first connecting hooks are connected with the other ends of the two first springs, and the two second connecting hooks are connected with the other ends of the two second springs.
In one embodiment, the pitch adjustment mechanism comprises a pitch adjustment plate, a threaded connection rod, a manual adjustment knob, and a lock nut;
step-shaped adjusting holes are formed in the corners of the pitching adjusting plate;
the bottom of the threaded connecting rod is fixed on the fixed part, and the upper part of the threaded connecting rod movably penetrates through the stepped adjusting hole;
the manual adjusting knob is sleeved on the threaded connecting rod in a threaded manner and is positioned below the pitching adjusting plate;
the locking nut is in threaded connection with the top of the threaded connecting rod, and the locking nut is matched with the stepped adjusting hole.
According to the high-precision clamp for measuring the corner sensor, the coaxial adjusting mechanism, the two-degree-of-freedom translation mechanism and the pitching adjusting mechanism are arranged, so that various problems of eccentricity, tower error, rotation interference and the like caused by direct fixation during measurement of the sensor can be effectively solved, and the accuracy of measurement of the sensor is improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic structural view of a jig for measuring a high-precision rotation angle sensor according to the present invention;
FIG. 2 is a schematic structural view of a two degree-of-freedom translation mechanism of the present invention;
FIG. 3 is a schematic view of the upper connector of the present invention;
FIG. 4 is a top view of the pitch adjustment mechanism of the present invention;
fig. 5 is a partial cross-sectional view of the pitch adjustment mechanism of the present invention.
Detailed Description
To facilitate an understanding of the utility model, the utility model will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a single embodiment.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1-5, an embodiment of the present invention provides a high-precision fixture for measuring a corner sensor, where the sensor 1 includes a housing 11 and a rotating shaft 12, and the fixture includes a coaxial adjusting mechanism 3, a two-degree-of-freedom translation mechanism 4, and a pitch adjusting mechanism 5, which are sequentially disposed from top to bottom;
the rotating shaft 12 is connected with an external power main shaft 2, and the power main shaft 2 can drive the rotating shaft to rotate;
the coaxial adjusting mechanism 3 is connected with the shell 11, and the coaxial adjusting mechanism 3 can adjust the position of the rotating shaft 12 in a horizontal plane to enable the rotating shaft 12 to be coaxial with the power spindle 2;
the two-degree-of-freedom translation mechanism 4 is connected with the coaxial adjusting mechanism 3, and the two-degree-of-freedom translation mechanism 4 can enable the shell 11 to move in a plane along with the rotating shaft 12 so as to translate without generating relative rotation;
the pitch adjustment mechanism 5 can adjust the pitch angle of the rotating shaft 12.
According to the high-precision clamp for measuring the corner sensor, the coaxial adjusting mechanism 3, the two-degree-of-freedom translation mechanism 4 and the pitching adjusting mechanism 5 are arranged, so that various problems of eccentricity, tower error, rotation interference and the like caused by direct fixation during measurement of the sensor can be effectively solved, and the accuracy of measurement of the sensor is improved.
In the present embodiment, the coaxial adjusting mechanism 3 is a two-dimensional translation stage or the like. Specifically, the two-dimensional translation stage is a product in the prior art, such as: the two-dimensional translation stage manufactured by Shanghai Union fiber laser instruments, Inc. with model number XYMB 150H-50-0.
Alternatively, the pitch adjustment mechanism 5 is fixed to an external fixing member 6 for easy mounting and fixing.
In an embodiment of the present invention, although the eccentricity and the step difference are adjusted before the fixing between the rotating shaft 12 and the power spindle 2, the clamping stress always has a certain influence on the coaxiality during the fixing, and the two-degree-of-freedom translation mechanism 4 is provided to solve the problem. Specifically, the two-degree-of-freedom translation mechanism 4 includes an upper connecting member 41, a middle sliding member 42, and a lower connecting member 43, the upper connecting member 41 is connected to the housing 11, the rotating shaft 12 sequentially and movably penetrates through the upper connecting member 41, the middle sliding member 42, and the lower connecting member 43, the middle sliding member 42 is respectively slidably connected to the upper connecting member 41 and the lower connecting member 43, and the middle sliding member 42 is perpendicular to the sliding direction of the upper connecting member 41 and the lower connecting member 43.
In this embodiment, the two-degree-of-freedom translation mechanism 4 has a three-layer structure, i.e., two mutually perpendicular sliding grooves, so that a two-dimensional degree of freedom is provided between the housing 11 and the fixing component 6, and it has a certain force-releasing function, so that when the sensor rotates, the housing 11 can perform x-direction or y-direction translation along with the rotating shaft 12, but does not rotate relatively, thereby solving the problem of eccentricity of the rotating shaft 12 after the housing 11 is fixed.
Specifically, a first groove 411 is arranged at the middle position of the bottom of the upper connecting piece 41, a second groove 431 is arranged at the middle position of the top of the lower connecting piece 43, a first strip-shaped sliding block 421 and a second strip-shaped sliding block 422 are respectively arranged at the upper side and the lower side of the middle sliding piece 42, the first strip-shaped sliding block 421 is matched with the first groove 411, and the second strip-shaped sliding block 422 is matched with the second groove 431;
first sliding grooves 412 are symmetrically formed in the bottom of the upper connecting piece 41 and located on two sides of the first groove 411, two first springs 413 are arranged in the first sliding grooves 412, and one ends of the two first springs 413 are respectively connected with the bottom of the first sliding grooves 412;
second sliding grooves 432 are symmetrically formed in the upper portion of the lower connecting piece 43, which is located on two sides of the second groove 431, two second springs 433 are arranged in the second sliding grooves 432, and one ends of the two second springs 433 are respectively connected with the bottom of the second sliding grooves 432;
the upper surface and the lower surface of the middle slider 42 are respectively provided with two first connecting hooks 423 and two second connecting hooks 424, the two first connecting hooks 423 are connected with the other ends of the two first springs 413, and the two second connecting hooks 424 are connected with the other ends of the two second springs 433.
In this embodiment, the sliding of the upper link 41, the middle slider 42, and the lower link 43 relative to each other can be made more stable by the interaction of the first spring 413 and the second spring 433 with the first coupling hook 421 and the second coupling hook 422, respectively.
In an embodiment of the present invention, the pitch adjustment mechanism 5 includes a pitch adjustment plate 51, a threaded connection rod 52, a manual adjustment knob 53, and a lock nut 54;
a step-shaped adjusting hole 55 is formed at the corner of the pitching adjusting plate 51;
the bottom of the threaded connecting rod 52 is fixed on the fixed part 6, and the upper part of the threaded connecting rod 52 is movably arranged in the stepped adjusting hole 55 in a penetrating way;
the manual adjusting knob 53 is sleeved on the threaded connecting rod 52 in a threaded manner, and the manual adjusting knob 53 is positioned below the pitch adjusting plate 51;
the locking nut 54 is in threaded connection with the top of the threaded connecting rod 52, and the locking nut 54 is matched with the stepped adjusting hole 55. When the locking nut 54 is locked by rotation, the locking nut 54 moves downward, is clamped into the stepped adjusting hole 55, and abuts against the stepped surface of the stepped adjusting hole 55.
In this embodiment, the pitching angle of the pitching adjusting plate 51 can be adjusted by independently rotating the manual adjusting knob 53 at different positions, and then, the locking nut 54 is rotated to lock, which can solve the problem that the sensor rotating shaft 12 is not parallel to the power spindle 2 after the housing 11 is fixed.
Alternatively, the pitch adjustment plate 51 of the pitch adjustment mechanism may be combined with the lower link 43 portion of the two-degree-of-freedom translation mechanism into an integral structure, so that the mechanism may be simplified and the cost may be reduced.
The embodiment of the utility model provides an adjusting method of a clamp for measuring a high-precision corner sensor, which comprises an adjusting method of a coaxial adjusting mechanism, wherein the adjusting method comprises the following steps:
s1, before the rotating shaft 12 and the power spindle 2 are rigidly fixed, a torsion spring meter or a micrometer is fixedly connected on the power spindle 2, so that the torsion spring meter or the micrometer can rotate along with the power spindle 2;
s2, contacting a measuring head of the torsion spring meter or the micrometer with the rotating shaft 12, and collecting data of the torsion spring meter or the micrometer;
and S3, controlling the power spindle 2 to stay at the positions of 0 degree, 90 degrees, 180 degrees and 270 degrees respectively, and adjusting the position of the rotating shaft 12.
Specifically, the step S3 includes:
s31, moving the power spindle 2 to 0 degree, collecting and recording the data a0 of the torsion spring meter or the micrometer,
s32, rotating the power spindle 2 to a 180-degree position, and collecting and recording a 1;
s33, enabling the coaxial adjusting mechanism 3 to move in the x direction (a0-a 1)/2;
s34, rotating the power main shaft 2 to the 90-degree position, collecting and recording a2,
s35, rotating the power spindle 2 to the 270-degree position, and recording a 3;
s36, enabling the coaxial adjusting mechanism 3 to move along the y direction (a2-a 3)/2;
s37, repeating the steps S31-S36 until the difference value between each two of a0, a1, a2 and a3 is within a set range, and optionally, the set range is 2-8 micrometers.
In an embodiment of the present invention, the method for adjusting the pitch adjustment mechanism 5 is further included, and the method for adjusting includes the following steps:
s01, coaxially installing the polyhedron on the rotating shaft 12, enabling the working surface of the polyhedron to be parallel to the rotating shaft 12, and connecting the rotating shaft 12 with the power spindle 2; in this embodiment, the polyhedron includes at least three faces, and the existing tetragonal iron or regular polygonal prism on the market can be applied.
S02, rotating the power spindle 2 by 120 degrees or 90 degrees, observing the position of the image reflected by the polyhedron by using an autocollimator, and changing the positions of the images reflected by different surfaces of the polyhedron when the rotating shaft 12 is not parallel to the power spindle 2; it should be noted that the rotation angle of the power spindle is selected according to the angular interval of the polyhedron, such as: the power main shaft rotates 120 degrees; the tetrahedron, the power spindle rotates 90 °.
S03, loosening the connection between the rotating shaft 12 and the power main shaft 2, adjusting the pitching adjusting mechanism 5, connecting the rotating shaft 12 and the power main shaft 2, and observing and adjusting in sequence until the position deviation of the multiple surface reflection images is within a certain range, so that the parallelism adjustment of the rotating shaft 12 and the power main shaft 2 is realized.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-described examples merely represent several embodiments of the present application and are not to be construed as limiting the scope of the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (5)
1. A high-precision clamp for measuring a corner sensor comprises a shell and a rotating shaft and is characterized in that the clamp comprises a coaxial adjusting mechanism, a two-degree-of-freedom translation mechanism and a pitching adjusting mechanism which are sequentially arranged from top to bottom;
the rotating shaft is connected with an external power main shaft, and the power main shaft can drive the rotating shaft to rotate;
the coaxial adjusting mechanism is connected with the shell and can adjust the position of the rotating shaft in a horizontal plane to enable the rotating shaft to be coaxial with the power main shaft;
the two-degree-of-freedom translation mechanism is connected with the coaxial adjusting mechanism, and can enable the shell to move in a plane along with the rotating shaft so as to translate without relative rotation;
the pitching adjusting mechanism can adjust the pitching angle of the rotating shaft.
2. The jig for measuring a high-precision rotation angle sensor according to claim 1, wherein the pitch adjustment mechanism is fixed to an external fixing member.
3. The high-precision rotation angle sensor measuring clamp according to claim 2, wherein the two-degree-of-freedom translation mechanism comprises an upper connecting piece, a middle sliding piece and a lower connecting piece, the upper connecting piece is connected with the housing, the rotating shaft sequentially and movably penetrates through the upper connecting piece, the middle sliding piece and the lower connecting piece, the middle sliding piece is respectively connected with the upper connecting piece and the lower connecting piece in a sliding manner, and the middle sliding piece is perpendicular to the sliding direction of the upper connecting piece and the sliding direction of the lower connecting piece.
4. The high-precision corner sensor measuring clamp according to claim 3, wherein a first groove is formed in the middle of the bottom of the upper connecting piece, a second groove is formed in the middle of the top of the lower connecting piece, a first bar-shaped sliding block and a second bar-shaped sliding block are respectively arranged on the upper side and the lower side of the middle sliding piece, the first bar-shaped sliding block is matched with the first groove, and the second bar-shaped sliding block is matched with the second groove;
first sliding grooves are symmetrically formed in the bottom of the upper connecting piece and located on two sides of the first groove, two first springs are arranged in the first sliding grooves, and one ends of the two first springs are connected with the bottom of the first sliding grooves respectively;
second sliding grooves are symmetrically formed in the upper portion of the lower connecting piece and located on two sides of the second groove, two second springs are arranged in the second sliding grooves, and one ends of the two second springs are connected with the bottoms of the second sliding grooves respectively;
the upper surface and the lower surface of the middle sliding part are respectively provided with two first connecting hooks and two second connecting hooks, the two first connecting hooks are connected with the other ends of the two first springs, and the two second connecting hooks are connected with the other ends of the two second springs.
5. The high-precision corner sensor measuring clamp according to claim 4, wherein the pitch adjusting mechanism comprises a pitch adjusting plate, a threaded connecting rod, a manual adjusting knob and a locking nut;
step-shaped adjusting holes are formed in the corners of the pitching adjusting plate;
the bottom of the threaded connecting rod is fixed on the fixed part, and the upper part of the threaded connecting rod movably penetrates through the stepped adjusting hole;
the manual adjusting knob is sleeved on the threaded connecting rod in a threaded manner and is positioned below the pitching adjusting plate;
the locking nut is in threaded connection with the top of the threaded connecting rod, and the locking nut is matched with the stepped adjusting hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122621935.XU CN216542850U (en) | 2021-10-29 | 2021-10-29 | High-precision corner sensor measuring clamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122621935.XU CN216542850U (en) | 2021-10-29 | 2021-10-29 | High-precision corner sensor measuring clamp |
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| Publication Number | Publication Date |
|---|---|
| CN216542850U true CN216542850U (en) | 2022-05-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122621935.XU Active CN216542850U (en) | 2021-10-29 | 2021-10-29 | High-precision corner sensor measuring clamp |
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| CN (1) | CN216542850U (en) |
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- 2021-10-29 CN CN202122621935.XU patent/CN216542850U/en active Active
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