CN210833453U - Gapless polyhedral prism mounting structure based on expansion - Google Patents
Gapless polyhedral prism mounting structure based on expansion Download PDFInfo
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- CN210833453U CN210833453U CN201921655495.6U CN201921655495U CN210833453U CN 210833453 U CN210833453 U CN 210833453U CN 201921655495 U CN201921655495 U CN 201921655495U CN 210833453 U CN210833453 U CN 210833453U
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Abstract
The utility model discloses an expansion-based gapless polygon mounting structure, which comprises an expansion part, a mounting part and a large round nut; the expansion part comprises a driving screw rod, an expansion ring sleeved outside the driving screw rod and a conical piece; the top of the mounting piece is provided with a second contact flange used for connecting the conical piece or the input shaft at the low-speed end of the detector; the middle part of the mounting piece is provided with a shaft shoulder for positioning, the multi-face prism is sleeved outside the mounting piece and is positioned below the shaft shoulder for positioning, and the shaft shoulder for positioning is used for limiting the axial position of the multi-face prism; the tail part of the mounting part is provided with an external thread, and the large round nut is screwed in from the external thread at the tail part of the mounting part to clamp the polyhedral arris body. The utility model discloses mounting structure can guarantee under a plurality of station circumstances that polyhedral arris body and the shafting connected does not have relative rotation, can realize hanging the requirement of polyhedral arris body, and spline clearance when avoiding the transmission simultaneously improves the installation accuracy.
Description
Technical Field
The utility model relates to a polyhedron arris body mounting technique among the reduction gear performance detects, in particular to zero clearance polyhedron arris body mounting structure based on inflation.
Background
The precision speed reducer is widely applied to various fields such as national economy, national defense industry and the like, along with the development of industrial automation technology, the requirement on the performance index of the speed reducer is higher and higher, and particularly in the field of robots, the transmission efficiency, the rotating speed requirement, the load capacity and the like of the speed reducer seriously influence the working precision and the service life of a system, so that the performance detection of the speed reducer becomes more important.
The angle measurement is used as a key technical parameter in the performance detection of the speed reducer, and the measurement precision of the key performance parameters such as the torsional rigidity, the idle stroke, the backlash, the transmission error and the like of the speed reducer is determined. In the high-precision comprehensive performance detector for the precision speed reducer, a circular grating is used as an angle measuring element, and the circular grating is connected in series in a high-low speed end shaft system and rotates coaxially and synchronously along with a high-low speed end. Because the circular grating still has angle measurement errors caused by eccentricity, inclination and shafting shaking, the angle measurement system of the circular grating needs to be calibrated by adopting a mode of combining a polygon and a photoelectric autocollimator as an angle measurement standard. Can install the polyhedron arris body on high-speed end output shaft and low-speed end input shaft station, the coaxial rotation just can be realized with the circular grating to the polyhedron arris body, just so can calculate the real angle of pivoted through autocollimator's reading and polyhedron pivoted working face number to compare with circular grating output digital display angle, thereby demarcate the survey angle error. But because the particularity of station, high-speed end output shaft requires the polyhedron arris can hang the installation, and because high-low speed end junction is the spline, requires the polyhedron mounting structure can realize gapless fixed with the integral key shaft, spline clearance when avoiding the transmission to the additional error of angle transmission production. Because there are two stations of high low-speed end, polyhedron mounting structure can be general better, can guarantee under a plurality of station circumstances that polyhedron and the shafting that is connected do not have relative rotation.
But the connection of the existing polygon mounting structure is complex, the mounting time is long, the use is troublesome, and the requirements of a precise speed reducer detector on no clearance and multiple stations of the mounting structure can not be met. Therefore need design a zero clearance polygon mounting structure based on inflation, make the polygon through the friction at the polygon with high, low-speed end shaft system synchronous rotation in-process no spline clearance, not produce additional error to the angle transmission, make the polygon can stably hang in high-speed end terminal surface below through expanding structure, can guarantee under a plurality of station circumstances that the polygon does not have relative rotation with the shafting of being connected, the cooperation is firm reliable, does not exert an influence to the structure of reduction gear detector.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming not enough among the prior art, providing a zero clearance polygon prism mounting structure based on inflation, this mounting structure can guarantee under a plurality of station circumstances that polygon prism and the shafting connected does not have relative rotation, can realize hanging the requirement of polygon prism, and spline clearance when avoiding the transmission simultaneously improves the installation accuracy.
The utility model adopts the technical proposal that: an expansion-based gapless polygon mounting structure comprises an expansion part, a mounting part and a large round nut;
the expansion part comprises a driving screw rod, an expansion ring sleeved outside the driving screw rod and a conical piece;
the outer wall of the expansion ring is cylindrical, the upper part of the inner wall of the expansion ring is cylindrical, and the lower part of the inner wall of the expansion ring is conical;
the conical piece comprises an expansion sleeve, a first contact flange and a square clamping part which are connected in sequence; the inner wall of the expansion sleeve is cylindrical, the lower part of the outer wall of the expansion sleeve is cylindrical, the upper part of the outer wall of the expansion sleeve is conical, and the outer wall of the conical surface of the expansion sleeve is matched with the inner wall of the conical surface of the expansion ring; a through threaded hole is formed in the center of the square clamping part;
the top of the driving screw is provided with a circular truncated cone, and the bottom surface of the circular truncated cone of the driving screw is in direct or indirect contact with the upper end surface of the expansion ring; the middle part of the driving screw is provided with an external thread, and the external thread of the driving screw is connected with a through threaded hole in the center of the square clamping part of the conical piece; the tail part of the driving screw is provided with an outer hexagon;
the top of the mounting piece is provided with a first contact flange used for connecting the conical piece or a second contact flange of the low-speed end input shaft of the detector; the middle part of the mounting piece is provided with a shaft shoulder for positioning, the multi-face prism is sleeved outside the mounting piece and is positioned below the shaft shoulder for positioning, and the lower end face of the shaft shoulder for positioning is in contact with the upper end face of the multi-face prism and is used for limiting the axial position of the multi-face prism; the tail part of the mounting part is provided with an external thread, and the large round nut is screwed in from the external thread at the tail part of the mounting part to clamp the polyhedral arris body.
Further, when the angle positioning calibration is carried out on the high-speed end circular grating angle measuring system of the detector, the polygon needs to be installed on a high-speed end output shaft station, at the moment, the upper end face of the first contact flange of the conical piece is in contact with the lower end face of the high-speed end output shaft in a fitting manner to realize axial positioning, and the second contact flange of the installation piece is connected with the first contact flange of the conical piece; after the driving screw penetrates through the expansion ring, the driving screw is screwed into a through threaded hole of a square clamping part at the tail part from the direction of an expansion sleeve of the conical piece, so that the inner wall of a lower conical surface of the expansion ring is in contact with the outer wall of an upper conical surface of the conical piece, the outer hexagon of the tail part of the driving screw is rotated in one direction, the driving screw moves downwards through thread transmission, the expansion ring is driven to move downwards through the pressure of the bottom surface of a circular truncated cone of the driving screw and the upper end surface of the expansion ring, the outer wall of the upper conical surface of the conical piece extrudes the inner wall of the lower conical surface of the expansion ring outwards, and the conical piece is connected with the high-speed end output shaft through the friction force between cylindrical surfaces formed by the expansion ring and the top circle of the internal spline teeth of the high.
Further, when carrying out angle location calibration to detector low-speed end circle grating angle measurement system, the polygon prism needs to be installed on low-speed end input shaft station, and at this moment, the second contact flange of installed part need not expansion part down direct with low-speed end input shaft, utilize the polygon prism with the frictional force of the dead weight of installed part production at low-speed end input shaft up end makes polygon prism and low-speed end input shaft can not produce relative rotation.
Furthermore, a metal gasket is arranged between the bottom surface of the circular truncated cone of the driving screw and the upper end surface of the expansion ring, and the diameter of the outer wall of the expansion ring is larger than the outer diameter of the metal gasket and smaller than the inner diameter of a cylindrical surface formed by an internal spline tooth top circle of the high-speed end output shaft; the upper end face of the expansion ring is in contact with the lower end face of the metal gasket, the upper end face of the metal gasket is in contact with the bottom face of the circular table of the driving screw rod, so that when the angle positioning and calibration of the high-speed end circular grating angle measuring system of the detector is carried out, the circular table of the driving screw rod can drive the expansion ring to move in the spline of the high-speed end output shaft through the metal gasket.
The outer diameter of the circular truncated cone of the driving screw is larger than the inner diameter of the metal gasket, so that the metal gasket can be driven to move downwards, and the expansion ring is driven to move downwards.
Furthermore, the taper of the conical surface at the lower part of the expansion ring is the same as that of the conical surface at the upper part of the expansion ring, and the diameter of the expansion ring is gradually increased from top to bottom; when the expansion ring moves towards the direction of the polygon, the inner wall of the lower conical surface of the expansion ring is extruded by the outer wall of the upper conical surface of the conical piece, and the outer cylindrical surface of the expansion ring expands outwards, so that the outer wall of the expansion ring is tightly attached to the cylindrical surface formed by the top circle of the internal spline teeth of the high-speed end output shaft; the lower conical surface of the expansion ring can be restored to the original shape after not being extruded by the upper conical surface of the conical piece.
Furthermore, the side wall of the expansion ring is provided with a rectangular opening which penetrates through the upper end face and the lower end face of the expansion ring, so that the expansion ring is favorably deformed.
Furthermore, set up on the first contact flange of conical part be used for with the through connection screw hole that the second contact flange of installed part is connected, through connection screw hole is provided with a plurality ofly, along the equidistant distribution of circumferencial direction.
Furthermore, a first contact flange of the conical piece is provided with two penetrating and disassembling threaded holes for use in disassembling, and the two penetrating and disassembling threaded holes are distributed at equal intervals along the circumferential direction and are positioned at the end face of the high-speed end output shaft; when dismantling high-speed end station, take off the installed part the polyhedron arris body with the whole back that big round nut is constituteed, utilize hexagonal spanner with the outer hexagonal cooperation of drive screw afterbody is rotatory drive screw, simultaneously, with interior hexagonal screw in the screw hole is dismantled in running through of toper piece, and makes the tip of interior hexagonal screw contacts with high-speed end output shaft terminal surface, will through screw drive the toper piece is ejecting.
Further, the top cylinder of installed part cooperatees with the cylinder that the internal spline tooth top circle of low-speed end input shaft formed, the last plane of the second contact flange of installed part contacts with the up end of low-speed end input shaft, forms the tang cooperation, guarantees the axiality of multiaspect arris body and low-speed end input shaft.
The utility model has the advantages that: the utility model relates to a gapless polyhedron arris body mounting structure based on inflation can realize that the polyhedron arris body hangs the station requirement of installation, and can guarantee under a plurality of station circumstances that the polyhedron arris body does not have relative rotation with the shafting of being connected, and the cooperation is firm reliable, and spline clearance when avoiding the transmission simultaneously does not produce additional error to the angle transmission, improves the installation accuracy. This mounting structure easy operation practices thrift polyhedron arris installation time, improves work efficiency, and can guarantee the axiality of polyhedron arris and shafting.
Drawings
FIG. 1: the utility model relates to a section schematic diagram of a gapless polygon mounting structure based on expansion at a high-speed end mounting station;
FIG. 2: the utility model relates to a structure schematic diagram of a driving screw in a gapless polygon mounting structure based on expansion;
FIG. 3: the utility model relates to a schematic structure diagram of an expansion ring in a gapless polygon mounting structure based on expansion;
FIG. 4: the utility model relates to a schematic structural diagram of a conical piece in a gapless polygon mounting structure based on expansion;
FIG. 5: the utility model relates to a structural sketch of an installation part in a gapless polygon mounting structure based on expansion;
FIG. 6: the utility model relates to a section schematic diagram when disassembling the installation structure of a gapless polygon based on expansion;
FIG. 7: the utility model relates to a zero clearance polygon prism mounting structure is at low-speed end installation station section sketch map based on inflation.
The attached drawings are marked as follows: 1. drive screw, 2, metal gasket, 3, expansion ring, 4, conical part, 5, installed part, 6, polyhedron arris body, 7, big round nut, 8, high-speed end output shaft, 9, low-speed end input shaft, 10, through connection screw hole, 11, through dismantlement screw hole.
Detailed Description
For further understanding of the contents, features and functions of the present invention, the following embodiments will be exemplified in conjunction with the accompanying drawings as follows:
as shown in fig. 1 to 7, an expansion-based gapless polygon mounting structure is used to fix a polygon 6 to a high-and low-speed end spline station without a gap. The mounting structure comprises an expansion member, a mounting member 5 and a large round nut 7. The expansion part comprises a driving screw rod 1, a metal gasket 2 sleeved outside the driving screw rod 1, an expansion ring 3 and a conical piece 4.
The outer wall of the expansion ring 3 is cylindrical, and the diameter of the outer wall of the expansion ring 3 is larger than the outer diameter of the metal gasket 2 and smaller than the inner diameter of a cylindrical surface formed by the top circle of the internal spline teeth of the high-speed end output shaft 8; the inner wall upper portion of expansion ring 3 is cylindrical, the inner wall lower part of expansion ring 3 is the circular conical surface, the inner wall diameter of expansion ring 3 is from last to increasing gradually down. The upper end face of the expansion ring 3 is in contact with the lower end face of the metal gasket 2, the upper end face of the metal gasket 2 is in contact with the bottom face of the circular table of the driving screw rod 1, so that when the angle positioning calibration is carried out on the high-speed end circular grating angle measuring system of the detector, the circular table of the driving screw rod 1 can drive the expansion ring 3 to move in the spline of the high-speed end output shaft 8 through the metal gasket 2. When the expansion ring 3 moves towards the polygon 6, the inner wall of the lower conical surface of the expansion ring 3 is pressed by the outer wall of the upper conical surface of the conical piece 4, the outer cylindrical surface of the expansion ring 3 expands outwards, and finally the outer wall of the expansion ring 3 is tightly attached to the cylindrical surface formed by the top circle of the internal spline teeth of the high-speed end output shaft 8; the lower conical surface of the expansion ring 3 can deform and restore to the original shape without being extruded by the upper conical surface of the conical piece 4. The side wall of the expansion ring 3 is provided with a rectangular opening which penetrates through the upper end surface and the lower end surface of the expansion ring 3, so that the expansion ring 3 is favorably deformed.
The conical member 4 comprises an expansion sleeve, a first contact flange and a square clamping part connected in sequence. The inner wall of the expansion sleeve is cylindrical, the lower portion of the outer wall of the expansion sleeve is cylindrical, the upper portion of the outer wall of the expansion sleeve is conical, the conical degree of the upper conical surface of the expansion ring 3 is the same as that of the lower conical surface of the expansion ring 3, and the diameter of the upper conical surface of the expansion ring is gradually increased from top to bottom, so that the outer wall of the conical surface of the expansion sleeve can be matched with the inner wall of the conical surface of the expansion ring 3. Set up on the first contact flange of conical part 4 be used for with the through connection screw hole 10 that the second contact flange of installed part 5 is connected, through connection screw hole 10 is provided with four, along the equidistant distribution of circumferencial direction. The first contact flange of the conical part 4 is also provided with two through-disassembly threaded holes 11 for use in disassembly, and the two through-disassembly threaded holes 11 are distributed at equal intervals along the circumferential direction and are positioned on the end face of the high-speed end output shaft 8; when the high-speed end station is disassembled, the connecting screw at the first contact flange of the conical piece 4 and the second contact flange of the mounting piece 5 is firstly taken down, the whole body formed by the mounting piece 5, the polygon 6 and the large round nut 7 is taken down, the driving screw 1 is rotated towards the other direction by utilizing the matching of a hexagon wrench and an outer hexagon at the tail part of the driving screw 1, meanwhile, two inner hexagon screws are screwed into the penetrating and disassembling threaded holes 11 of the conical piece 4, the end parts of the inner hexagon screws are in contact with the end surface of the high-speed end output shaft 8, and the conical piece 4 is ejected out through screw transmission. The outer side of the square clamping part positioned at the tail part of the conical piece 4 is square, and the conical piece 4 can be clamped at the square clamping part by a spanner when in use; the center of the square clamping part is provided with a through threaded hole, and the driving screw rod 1 can be screwed into the conical piece 4 through the through threaded hole.
The top of the driving screw rod 1 is provided with a circular truncated cone, the bottom surface of the circular truncated cone of the driving screw rod 1 is in contact with the upper end face of the metal gasket 2, the outer diameter of the circular truncated cone of the driving screw rod 1 is larger than the inner diameter of the metal gasket 2, and therefore the metal gasket 2 can be driven to move downwards and drive the expansion ring 3 to move downwards. The middle part of the driving screw rod 1 is provided with an external thread, and the external thread of the driving screw rod 1 is connected with a through threaded hole in the center of the square clamping part of the conical piece 4; the tail of the driving screw rod 1 is provided with an outer hexagon, so that an outer hexagon wrench convenient to use can rotate the driving screw rod 1.
The top of installed part 5 is provided with and is used for connecting the first contact flange of conical member 4 or the second contact flange of detector low-speed end input shaft 9, set up on the second contact flange be used for with the circular through-hole that conical member 4 is connected, circular through-hole with through connection screw hole 10 one-to-one on the first contact flange of conical member 4. The top cylinder of installed part 5 with the cylinder that the internal spline tooth top circle of low-speed end input shaft 9 formed cooperatees, the last plane of the second contact flange of installed part 5 with the up end contact of low-speed end input shaft 9 forms the tang cooperation, guarantees polyhedral arris body 6 with the axiality of low-speed end input shaft 9. The middle part of installed part 5 is provided with the shaft shoulder location, 6 covers of polygon are established the outside of installed part 5 is located the below of shaft shoulder location, the lower terminal surface of shaft shoulder location with the up end contact of polygon 6 is used for injecing polygon 6's axial position. The afterbody of installed part 5 is provided with the external screw thread, big round nut 7 is followed the external screw thread screw in of installed part 5 afterbody presss from both sides tightly through the screw thread transmission polygon 6.
When the angle positioning and calibration are carried out on the high-speed end circular grating angle measuring system of the detector, the polygon 6 needs to be installed on a station of a high-speed end output shaft 8, at the moment, the driving screw rod 1 sequentially penetrates through the metal gasket 2, the expansion ring 3 (the cylindrical surface is transited to the conical surface direction) is screwed into a through threaded hole of a square clamping part at the tail part from the expansion sleeve direction of the conical part 4, and the inner wall of the lower conical surface of the expansion ring 3 is slightly contacted with the outer wall of the upper conical surface of the conical part 4; rotating the driving screw rod 1 by using an outer hexagon wrench, rotating the outer hexagon at the tail part of the driving screw rod 1 in one direction, driving the metal gasket 2 and the expansion ring 3 to move towards the multi-faceted prism 6 by virtue of thread transmission, pressing the circular truncated cone of the driving screw rod 1, the metal gasket 2 and the expansion ring 3 by virtue of the circular truncated cone of the driving screw rod 1, extruding the inner wall of the lower conical surface of the expansion ring 3 from the outer wall of the upper conical surface of the conical piece 4 to the outer side, expanding the outer cylindrical surface of the expansion ring 3 to the outer side, finally pressing and contacting the outer cylindrical surface of the expansion ring 3 and the cylindrical surface formed by the top circle of the inner spline teeth of the high-speed end output shaft 8 to be tightly attached, and firmly connecting the conical piece 4 and the high-speed end output shaft 8 together by virtue of friction force generated by the contacting surfaces; and because the thread has self-locking capacity, the driving screw rod 1 and the conical piece 4 do not move relatively, the expansion ring 3 keeps a compression expansion state, and the conical piece 4 is stably fixed on the end surface of the high-speed end output shaft 8. The up end of the first contact flange of conical member 4 and the lower terminal surface laminating contact of high-speed end output shaft 8 realize axial positioning, the second contact flange of installed part 5 with the first contact flange of conical member 4 is connected through the socket head cap screw, polygon prism 6 is installed the shaft shoulder location department of installed part 5, and through big round nut 7 with the threaded connection of installed part 5 is right polygon prism 6 compresses tightly. When the mounting structure is dismounted, the connecting screw at the first contact flange of the conical piece 4 and the second contact flange of the mounting piece 5 is firstly taken down, the whole body formed by the mounting piece 5, the polygon 6 and the large round nut 7 is dismounted, the driving screw 1 is rotated towards the other direction by utilizing the matching of a hexagon wrench and an outer hexagon at the tail part of the driving screw 1, meanwhile, two inner hexagon screws are screwed into the penetrating dismounting threaded holes 11 of the conical piece 4, the end parts of the inner hexagon screws are in contact with the end surface of the high-speed end output shaft 8, and the conical piece 4 is ejected out through screw transmission.
When the angle positioning and calibration are carried out on the detector low-speed end circular grating angle measuring system, the polygon 6 needs to be installed on a low-speed end input shaft 9 station, at the moment, the expansion part is not needed, and the whole body formed by the installation part 5, the polygon 6 and the large circular nut 7 which are disassembled is inverted in the low-speed end input shaft 9; the mounting piece 5 and the low-speed end input shaft 9 form a spigot fit, and the friction force generated on the upper end face of the low-speed end input shaft 9 by the self weight of the polygon 6 and the mounting piece 5 is utilized to prevent the polygon 6 and the low-speed end input shaft 9 from rotating relatively.
When the expansion screw is used, the driving screw 1 sequentially penetrates through the metal gasket 2, the expansion ring 3 (the cylindrical surface is transited to the conical surface direction) is screwed into the through threaded hole of the tail square clamping part from the expansion sleeve direction of the conical part 4, and the inner conical surface of the expansion ring 3 is slightly contacted with the outer conical surface of the conical part 4.
When the high-speed input shaft is in work, the square clamping part at the tail part of the conical piece 4 is clamped by a spanner, and the expansion part is placed in the high-speed output shaft 8 until the upper end surface of the first contact flange of the conical piece 4 is in contact with the end surface of the high-speed input shaft; the driving screw rod 1 is rotated in one direction by a hexagonal wrench, the driving screw rod 1 moves downwards through thread transmission, the outer cylindrical surface of the expansion ring 3 expands and deforms outwards, and finally the outer cylindrical surface of the expansion ring 3 is in extrusion contact with and is tightly attached to the cylindrical surface formed by the top circle of the internal spline teeth of the high-speed end output shaft 8; the conical piece 4 is stably fixed on the end surface of the high-speed end output shaft 8; the second contact flange of the mounting part 5 is connected with the first contact flange of the conical part 4 through a socket head cap screw; the upper end surface of the polygon 6 is contacted with the lower end surface of the shaft shoulder positioning part 5; the large round nut 7 is screwed into the external thread of the mounting part 5 and compresses the polygon 6 through thread transmission.
During disassembly, the connecting screws at the first contact flange of the conical piece 4 and the second contact flange of the mounting piece 5 are firstly removed; taking down the whole body consisting of the mounting piece 5, the polygon 6 and the large round nut 7; rotating the driving screw 1 in the other direction by using a hexagonal wrench; screwing two inner hexagon screws into the through disassembly threaded holes 11 of the conical piece 4, and ejecting the conical piece 4 through screw transmission; the inner conical surface of the expansion ring 3 is not extruded by the outer conical surface of the conical piece 4 and then deforms and returns to the original shape; and integrally taking out the expansion part.
Inverting the whole of the mounting member 5, the polygonal body 6 and the large round nut 7 which are disassembled in the low-speed-end input shaft 9; the mounting member 5 forms a spigot fit with the low speed end input shaft 9.
Although the preferred embodiments of the present invention have been described with reference to the accompanying drawings, the present invention is not limited to the above-mentioned embodiments, which are only illustrative and not restrictive, and those skilled in the art can make many forms without departing from the spirit and scope of the present invention, which is within the protection scope of the present invention.
Claims (10)
1. An expansion-based gapless polygon mounting structure is characterized by comprising an expansion part, a mounting part (5) and a large round nut (7);
the expansion part comprises a driving screw rod (1), an expansion ring (3) sleeved outside the driving screw rod (1) and a conical piece (4);
the outer wall of the expansion ring (3) is cylindrical, the upper part of the inner wall of the expansion ring (3) is cylindrical, and the lower part of the inner wall of the expansion ring (3) is conical;
the conical piece (4) comprises an expansion sleeve, a first contact flange and a square clamping part which are connected in sequence; the inner wall of the expansion sleeve is cylindrical, the lower part of the outer wall of the expansion sleeve is cylindrical, the upper part of the outer wall of the expansion sleeve is conical, and the outer wall of the conical surface of the expansion sleeve is matched with the inner wall of the conical surface of the expansion ring (3); a through threaded hole is formed in the center of the square clamping part;
the top of the driving screw (1) is provided with a circular truncated cone, and the bottom surface of the circular truncated cone of the driving screw (1) is directly or indirectly contacted with the upper end surface of the expansion ring (3); the middle part of the driving screw rod (1) is provided with an external thread, and the external thread of the driving screw rod (1) is connected with a through threaded hole in the center of the square clamping part of the conical piece (4); the tail part of the driving screw rod (1) is provided with an outer hexagon;
the top of the mounting piece (5) is provided with a first contact flange for connecting the conical piece (4) or a second contact flange of a low-speed end input shaft (9) of the detector; the middle part of the mounting piece (5) is provided with a shaft shoulder for positioning, the multi-surface prism (6) is sleeved outside the mounting piece (5) and is positioned below the shaft shoulder for positioning, and the lower end face of the shaft shoulder for positioning is in contact with the upper end face of the multi-surface prism (6) and is used for limiting the axial position of the multi-surface prism (6); the tail part of the mounting part (5) is provided with an external thread, and the large round nut (7) is screwed in and tightly clamps the polygon (6) from the external thread at the tail part of the mounting part (5).
2. The installation structure of the gapless polygon based on expansion according to claim 1, wherein the polygon (6) is required to be installed on a high-speed end output shaft (8) station when an angle measurement system of a circular grating angle measurement system at a high-speed end of a detector is subjected to angle positioning calibration, at the moment, the upper end face of the first contact flange of the conical piece (4) is in contact with the lower end face of the high-speed end output shaft (8) in a fitting manner to realize axial positioning, and the second contact flange of the installation piece (5) is connected with the first contact flange of the conical piece (4); the driving screw rod (1) is screwed into a through threaded hole of the square clamping part at the tail part from the direction of the expansion sleeve of the conical piece (4) after passing through the expansion ring (3), the inner wall of the conical surface at the lower part of the expansion ring (3) is contacted with the outer wall of the conical surface at the upper part of the conical piece (4), the outer hexagon at the tail part of the driving screw rod (1) is rotated towards one direction, the driving screw rod (1) moves downwards through the thread transmission, the expansion ring (3) is driven to move downwards through the pressure of the bottom surface of the circular truncated cone of the driving screw rod (1) and the upper end surface of the expansion ring (3), the outer wall of the upper conical surface of the conical piece (4) extrudes the inner wall of the lower conical surface of the expansion ring (3) outwards, so that the conical piece (4) and the high-speed end output shaft (8) are connected together through the friction force between the expansion ring (3) and the cylindrical surface formed by the top circle of the internal spline of the high-speed end output shaft (8).
3. An expansion-based gapless polygon mounting structure as claimed in claim 1, wherein when calibrating the angle positioning of the low-speed end circular grating angle measuring system of the measuring instrument, the polygon (6) is mounted on the low-speed end input shaft (9), and at this time, the second contact flange of the mounting member (5) is directly connected with the low-speed end input shaft (9) without the expansion component, and the polygon (6) and the low-speed end input shaft (9) do not rotate relatively due to the friction force generated on the upper end face of the low-speed end input shaft (9) by the self-weight of the polygon (6) and the mounting member (5).
4. The gapless polygon mounting structure based on expansion according to claim 1, wherein a metal gasket (2) is arranged between the bottom surface of the circular truncated cone of the driving screw (1) and the upper end surface of the expansion ring (3), the diameter of the outer wall of the expansion ring (3) is larger than the outer diameter of the metal gasket (2) and smaller than the inner diameter of the cylindrical surface formed by the top circle of the internal spline of the high-speed end output shaft (8); the up end of expansion ring (3) with the lower terminal surface of metal gasket (2) contacts, the up end of metal gasket (2) with the round platform bottom surface of drive screw (1) contacts, is convenient for carry out angle location calibration to detector high-speed end circle grating angle measurement system, the round platform of drive screw (1) can pass through metal gasket (2) drives expansion ring (3) removes in the spline of high-speed end output shaft (8).
5. An expansion based gapless polygon mounting structure as claimed in claim 4 wherein the circular table outer diameter of the drive screw (1) is larger than the inner diameter of the metal gasket (2) to ensure that the metal gasket (2) is driven to move downwards and thus the expansion ring (3) is driven to move downwards.
6. An expansion based gapless polygon mounting structure as claimed in claim 1 wherein the taper of the lower conical surface of the expansion ring (3) is the same as the taper of the upper conical surface of the expansion ring (3), increasing in diameter from top to bottom; when the expansion ring (3) moves towards the multi-face prism (6), the inner wall of the lower conical surface of the expansion ring (3) is pressed against the outer wall of the upper conical surface of the conical piece (4), and the outer cylindrical surface of the expansion ring (3) expands outwards, so that the outer wall of the expansion ring (3) is tightly attached to the cylindrical surface formed by the top circle of the internal spline teeth of the high-speed end output shaft (8); the lower conical surface of the expansion ring (3) can be restored after not being extruded by the upper conical surface of the conical piece (4).
7. The installation structure of the gapless polygon based on expansion according to claim 1, wherein the side wall of the expansion ring (3) is provided with rectangular openings penetrating through the upper and lower end faces of the expansion ring (3) to facilitate the deformation of the expansion ring (3).
8. The gapless polyhedron mounting structure based on expansion according to claim 1, wherein a plurality of through connection threaded holes (10) for connecting with the second contact flange of the mounting piece (5) are formed in the first contact flange of the conical piece (4), and the through connection threaded holes (10) are distributed at equal intervals along the circumferential direction.
9. The gapless polygon mounting structure based on expansion according to claim 1, wherein the first contact flange of the conical member (4) is provided with two through-dismounting threaded holes (11) for dismounting, and the two through-dismounting threaded holes (11) are distributed at equal intervals along the circumferential direction and are located at the end face position of the high-speed end output shaft (8); when dismantling high-speed end station, take off installed part (5) polyhedral prism (6) with the whole back that big round nut (7) are constituteed utilizes the hexagonal spanner with the outer hexagonal cooperation of drive screw (1) afterbody is rotatory drive screw (1), simultaneously, with the socket head cap screw in screw hole (11) are dismantled in running through of toper piece (4), and make the tip of socket head cap screw contacts with high-speed end output shaft (8) terminal surface, will through screw drive toper piece (4) are ejecting.
10. An expansion-based gapless polygon mounting structure as claimed in claim 1 wherein the top cylindrical surface of the mounting member (5) is engaged with the cylindrical surface formed by the inner spline crest circle of the low speed input shaft (9), the upper flat surface of the second contact flange of the mounting member (5) is contacted with the upper end surface of the low speed input shaft (9) to form a spigot engagement, ensuring the coaxiality of the polygon (6) and the low speed input shaft (9).
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110595394A (en) * | 2019-09-30 | 2019-12-20 | 天津大学 | Gapless polyhedral prism mounting structure based on expansion |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110595394A (en) * | 2019-09-30 | 2019-12-20 | 天津大学 | Gapless polyhedral prism mounting structure based on expansion |
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