CN111188828B - Shaking pair and air bearing assembly using same - Google Patents
Shaking pair and air bearing assembly using same Download PDFInfo
- Publication number
- CN111188828B CN111188828B CN202010099160.1A CN202010099160A CN111188828B CN 111188828 B CN111188828 B CN 111188828B CN 202010099160 A CN202010099160 A CN 202010099160A CN 111188828 B CN111188828 B CN 111188828B
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- China
- Prior art keywords
- column
- retainer ring
- sleeving
- bearing
- annular groove
- Prior art date
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- 229910000831 Steel Inorganic materials 0.000 claims abstract description 19
- 239000010959 steel Substances 0.000 claims abstract description 19
- 239000010979 ruby Substances 0.000 claims description 14
- 229910001750 ruby Inorganic materials 0.000 claims description 14
- 239000007787 solid Substances 0.000 claims description 14
- 238000004026 adhesive bonding Methods 0.000 claims description 3
- 238000009434 installation Methods 0.000 abstract description 16
- 238000000034 method Methods 0.000 description 12
- 238000004519 manufacturing process Methods 0.000 description 8
- 229910000975 Carbon steel Inorganic materials 0.000 description 5
- 239000010962 carbon steel Substances 0.000 description 5
- 230000007774 longterm Effects 0.000 description 5
- 239000003292 glue Substances 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 230000000149 penetrating effect Effects 0.000 description 3
- 238000004381 surface treatment Methods 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 238000007743 anodising Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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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
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C11/00—Pivots; Pivotal connections
- F16C11/04—Pivotal connections
- F16C11/06—Ball-joints; Other joints having more than one degree of angular freedom, i.e. universal joints
- F16C11/0604—Construction of the male part
-
- 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
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C11/00—Pivots; Pivotal connections
- F16C11/04—Pivotal connections
- F16C11/06—Ball-joints; Other joints having more than one degree of angular freedom, i.e. universal joints
- F16C11/0619—Ball-joints; Other joints having more than one degree of angular freedom, i.e. universal joints the female part comprising a blind socket receiving the male part
- F16C11/0623—Construction or details of the socket member
-
- 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
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C32/00—Bearings not otherwise provided for
- F16C32/06—Bearings not otherwise provided for with moving member supported by a fluid cushion formed, at least to a large extent, otherwise than by movement of the shaft, e.g. hydrostatic air-cushion bearings
- F16C32/0603—Bearings not otherwise provided for with moving member supported by a fluid cushion formed, at least to a large extent, otherwise than by movement of the shaft, e.g. hydrostatic air-cushion bearings supported by a gas cushion, e.g. an air cushion
- F16C32/0614—Bearings not otherwise provided for with moving member supported by a fluid cushion formed, at least to a large extent, otherwise than by movement of the shaft, e.g. hydrostatic air-cushion bearings supported by a gas cushion, e.g. an air cushion the gas being supplied under pressure, e.g. aerostatic bearings
-
- 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
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C32/00—Bearings not otherwise provided for
- F16C32/06—Bearings not otherwise provided for with moving member supported by a fluid cushion formed, at least to a large extent, otherwise than by movement of the shaft, e.g. hydrostatic air-cushion bearings
- F16C32/0662—Details of hydrostatic bearings independent of fluid supply or direction of load
- F16C32/067—Details of hydrostatic bearings independent of fluid supply or direction of load of bearings adjustable for aligning, positioning, wear or play
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rolling Contact Bearings (AREA)
- Pivots And Pivotal Connections (AREA)
Abstract
A rocking pair and an air bearing assembly using the same, the rocking pair comprising: the bearing column is provided with a coaxial cone pit from the center of the top surface, and a slotted hole is formed at the small-diameter end of the cone pit; the retaining ring is fixedly sleeved in the slotted hole, and a first annular groove is formed in the inner wall surface of the retaining ring; the supporting rod comprises a stud, a polygonal body and a ball table sleeving part, the ball table sleeving part comprises a ball table part connected with the stud and in movable contact with the inner wall surface of the cone pit and a sleeving column connected with the ball table part and matched with the ball table part to be sleeved in the retainer ring, a second annular groove is formed on the sleeving column, a first movable gap exists between the bottom surface of the sleeving column and the bottom surface of the retainer ring when the sleeving column is fixedly sleeved in the retainer ring, and a second movable gap exists between the retainer ring and the bottom surface of the ball table part; the steel wire check ring is arranged in the accommodating cavity formed by the first annular groove and the second annular groove. The spherical table part can swing freely in the cone pit without excessive surface contact, and the processing is simple; the supporting rod cannot be separated from the bearing column, and the installation is simple and convenient.
Description
Technical Field
The present invention relates to a rocking pair and an air bearing assembly using the same.
Background
At present, the track of X, Y, Z directions of the three-coordinate measuring machine adopts air floatation systems, and the air floatation systems consist of the track, an air cushion and a thrust transmission and adjustment mechanism matched with the air cushion. The air cushion comprises an air cushion, a thrust transmission and adjustment mechanism and a control mechanism, wherein the thrust transmission and adjustment mechanism of the air cushion is a shaking pair, the existing shaking pair comprises a ball socket and a support rod, the ball socket is arranged at a mounting hole in the center of the back of the air cushion, and a process blind hole is arranged in the center of the ball socket; the supporting rod consists of a ball table, a stud and a hexagonal body, the ball table is arranged at the end part of the supporting rod, and the ball table is in movable contact with the technological blind hole in the ball socket. In practical use, the shaking pair is required to shake accurately and flexibly, and the contact area is large (namely the contact stress is small), so that the shaking pair and the ball socket are ideally designed to be in surface contact, and the contact stress is minimum in surface contact, so that the requirements can only be met in ball socket pairing grinding of the ball table, and the process procedures of pairing grinding, pairing storage, pairing use and pairing replacement are very complicated, the air cushion is required to be paired and ground on site before being installed in a measuring machine, the procedure is complicated, and the standardization and modularization degree is low. However, if polishing is not performed, the following problems occur in the state of the rocking pair: if the spherical diameter of the ball table is smaller than that of the ball socket, the spherical surface of the ball table is contacted with the hole edge of the technological blind hole of the ball socket, the contact line diameter is small, and the contact stress is large; if the diameter of the technological blind hole of the ball socket is too small, the length of the contact line is very short, the contact stress can be very large, and the local stress deformation of the shaking pair causes low shaking precision and large resistance; if the diameter of the ball table is larger than that of the ball socket, the ball table is located on the edge of the top surface of the ball socket, the contact stress is large, and the shaking performance of the shaking pair is poor. However, due to the limitation of the technology, the diameters of the top ends of the ball tables of a plurality of air cushion professional manufacturers are too small, a ball socket which is close to the hemispherical depth only bears the thrust of the air cushion at the bottom of the ball socket, the local stress at the bottom of the ball socket is large, so that the local deformation is large, the shaking pair cannot reach the spherical contact, the shaking pair feels harsh noise when shaking by hands, and the shaking pair fails when entering a working state. While many air cushion professional manufacturers are aware of these problems, dimensional tolerances of the exact clearance fit of the table and socket are also specified in an effort to achieve surface contact of the table and socket, in practice only line contact of the table with the hole edges of the process blind holes of the socket is achieved, the material within the process blind holes is hollowed out, and the thrust of the bearing air cushion will cause greater deformation of the hole edge regions, affecting the rocking performance of the rocking pair.
In the conventional shaking pair, the friction coefficient between an aluminum ceramic layer (usually with the thickness of 20-40 μm) generated after hard anodizing of the ball socket and a table made of carbon steel is large, so that the performance of the shaking pair is also influenced, the elastic modulus of an aluminum matrix of the ball socket is low and is only 1/3 of that of carbon steel, the compressive strength is low, cracks and even slag fall can occur in the hard anodized layer of the ball socket, and the performance of the shaking pair is deteriorated and even the shaking fails.
In addition, the shaking pair and the air cushion are not usually fixed by a release preventing mechanism, and two or more installation personnel are generally required to work together during installation, so that the installation is relatively troublesome.
In view of this, it is necessary to make certain improvements to the existing rocker pair to satisfy the demands of simple manufacture and convenient installation.
Disclosure of Invention
The invention aims to provide a shaking pair which is simple to manufacture and convenient to install and an air bearing assembly using the shaking pair.
In order to solve the technical problems, the invention discloses the following technical scheme. A rocking pair comprising:
the bearing column is downwards recessed from the center of the top surface to form a coaxial cone pit, and a slotted hole which is coaxial with the cone pit and penetrates through the bottom surface of the bearing column is formed at the small-diameter end of the cone pit;
The retaining ring is fixedly sleeved in the slotted hole, and a first annular groove is formed in the inner wall surface of the retaining ring;
The supporting rod comprises a stud, a polygonal body arranged at one end of the stud and a table sleeving part arranged at the other end of the stud, wherein the table sleeving part comprises a table part connected with the stud and in movable contact with the inner wall surface of the conical pit and a sleeving column connected with the table part and matched with and sleeved in the retainer ring, a second annular groove is formed on the outer wall surface of the sleeving part at a position corresponding to the first annular groove, and a first movable gap exists between the bottom surface of the sleeving part and the bottom surface of the retainer ring and a second movable gap exists between the retainer ring and the bottom surface of the table part when the sleeving part is fixedly sleeved in the retainer ring;
and the steel wire check ring is arranged in a containing cavity formed by the first annular groove and the second annular groove so as to realize the fixed sleeving of the check ring and the sleeving part.
The further technical scheme is as follows: the bottom end face corner of cup joint portion is equipped with a first chamfer.
The further technical scheme is as follows: and a second chamfer is arranged at the corner of one side of the second annular groove, which is close to the bottom end surface of the sleeving part.
The further technical scheme is as follows: the ball table part comprises a first column body connected with the stud and a hollow ball table fixedly sleeved on the first column body, and the spherical surface of the hollow ball table is in movable contact with the inner wall surface of the cone pit.
The further technical scheme is as follows: the hollow ball table is fixedly sleeved on the first column body in an interference fit or glue bonding mode.
The further technical scheme is as follows: the ball table part comprises a solid ball table connected with the stud, and the spherical surface of the solid ball table is movably contacted with the inner wall surface of the cone pit.
The further technical scheme is as follows: the ball table part comprises a second column connected with the stud and a hemispherical table arranged at the other end of the second column, and the spherical surface of the hemispherical table is in movable contact with the inner wall surface of the cone pit.
The further technical scheme is as follows: the inner hole of the baffle ring is a round hole, and the sleeving column is cylindrical.
An air bearing assembly comprises a shaking pair and an air cushion, wherein a mounting hole for fixedly mounting the bearing column is formed in the center of the back surface of a working surface of the air cushion.
The further technical scheme is as follows: the pressure equalizing device comprises an air cushion, and is characterized in that a pressure equalizing groove is formed in a way that the working surface of the air cushion is recessed downwards, a plurality of circular tube mounting holes are formed in the pressure equalizing groove, a short circular tube is fixedly arranged in each circular tube mounting hole, a first slotted hole and a second slotted hole which are coaxially and penetratingly communicated are formed in the center position of each short circular tube, the inner diameter of each first slotted hole is smaller than that of each second slotted hole, a ruby bearing is fixedly arranged in each second slotted hole, an orifice communicated with each first slotted hole is formed in the center of each ruby bearing, the end face of each ruby bearing is flush with the end face of each short circular tube, and an air cavity is formed between the end face of each ruby bearing and the working surface of the air cushion; an air passage is arranged in the air cushion and is communicated with the first slotted hole; the side of the air cushion is provided with at least one first threaded hole which is communicated with the air passage and used for installing a screwed plug and a nozzle hole which is communicated with the air passage and used for installing a nozzle, and the first threaded hole and the nozzle hole are communicated with the air passage.
The beneficial technical effects of the invention are as follows: the shaking pair comprises a bearing column, a retainer ring, a supporting rod and a steel wire retainer ring, wherein the spherical surface of the ball table part is in movable contact with the inner wall surface of the cone pit, a first movable gap exists between the bottom surface of the sleeve joint column and the bottom surface of the retainer ring, a second movable gap exists between the retainer ring and the bottom surface of the ball table part, the spherical surface of the ball table part can swing freely on the inner wall surface of the cone pit without excessive surface contact, and the machining and the manufacturing are relatively simple; and cup joint the post on the bracing piece and pass through steel wire retaining ring and retaining ring fixed cup joint in the force-bearing post, the bracing piece can not break away from the force-bearing post, stable in structure, so when need install it in three coordinate measuring machine use, single installer can accomplish the installation, and the installation is simple and convenient.
Drawings
FIG. 1 is a schematic exploded view of a first embodiment of a rocker pair of the present invention;
FIG. 2 is a schematic cross-sectional view of a first embodiment of a rocker pair of the present invention;
FIG. 3 is a schematic exploded view of a second embodiment of a rocker pair of the present invention;
FIG. 4 is a schematic cross-sectional view of a second embodiment of a rocker pair of the present invention;
FIG. 5 is a schematic exploded view of a third embodiment of a rocker pair of the present invention;
FIG. 6 is a schematic cross-sectional view of a third embodiment of a rocking pair of the present invention;
FIG. 7 is a schematic exploded view of a portion of the structure of the air bearing assembly of the present invention;
fig. 8 is a schematic cross-sectional view of the structure of the air cushion of the present invention.
Detailed Description
In order to more fully understand the technical content of the present invention, the following technical solutions of the present invention are further described and illustrated with reference to the schematic drawings, but are not limited thereto.
As shown in fig. 1 to 2, in the first embodiment, the rocking pair comprises a bearing post 10, a retainer ring 11, a supporting rod 12 and a steel wire retainer ring 13, wherein the bearing post 10 is recessed downwards from the center of the top surface to form a coaxial cone pit 100, and a slot 101 coaxial with the cone pit 100 and penetrating the bottom surface of the bearing post 10 is formed at the small diameter end of the cone pit 100; the baffle ring 11 is fixedly sleeved in the slotted hole 101, and a first annular groove 110 is formed in the inner wall surface of the baffle ring 11; the supporting rod 12 comprises a stud 120, a polygonal body 121 arranged at one end of the stud 120, and a ball table sleeving part arranged at the other end of the stud 120, the ball table sleeving part comprises a ball table part and a sleeving column 124, the ball table part comprises a first column 122 connected with the stud 120 and a hollow ball table 123 fixedly sleeved on the first column 122, the spherical surface of the hollow ball table 123 is movably contacted with the inner wall surface of the conical pit 100, the sleeving column 124 is connected with the other end of the first column 122 and is matched and sleeved in the retainer ring 11, a second annular groove 1240 is formed at the position corresponding to the first annular groove 110 on the outer wall surface of the sleeving column 124, a first movable gap 140 exists between the bottom surface of the sleeving column 124 and the bottom surface of the retainer ring 11 when the sleeving column 124 is fixedly sleeved in the retainer ring 11, a second movable gap 141 exists between the retainer ring 11 and the bottom surface of the ball table part, and the steel wire retainer ring 13 is arranged in a containing cavity formed by the first annular groove 110 and the second annular groove 1240 so as to realize the fixed sleeving of the retainer ring 11 and the retainer ring 124.
In actual use, as shown in fig. 2, the bearing post 10 in the shaking pair is fixedly installed in the installation hole 150 of the air cushion 15, when the supporting rod 12 is installed on the bearing post 10, the spherical surface of the hollow ball table 123 fixed on the supporting rod 12 is movably contacted with the inner wall surface of the cone pit 100, the sleeve post 124 on the supporting rod 12 is sleeved and fixed in the baffle ring 11 in the bearing post 10, a first movable gap 140 exists between the bottom surface of the sleeve post 124 and the bottom surface of the baffle ring 11, and a second movable gap 141 exists between the baffle ring 11 and the bottom surface of the ball table part, at this time, the hollow ball table 123 can freely swing relative to the cone pit 100, so as to realize the purpose of the shaking pair.
In this embodiment, the spherical surface of the hollow spherical platform 123 is in movable contact with the inner wall surface of the cone pit 100, meanwhile, a first movable gap 140 exists between the bottom surface of the socket post 124 and the bottom surface of the retainer ring 11, and a second movable gap 141 exists between the retainer ring 11 and the bottom surface of the spherical platform portion, so as to meet the requirement of free swinging, and the contact between the hollow spherical platform 123 and the cone pit 100 does not need excessive surface contact, so that the manufacturing and processing process is relatively simple, and the production requirement is met. In addition, because the sleeve joint post 124 on the support rod 12 is fixedly sleeved with the baffle ring 11 through the steel wire retainer ring 13, the support rod 12 is not easy to separate from the bearing post 10, and the structure is stable, and when the support rod is installed in a three-coordinate measuring machine, a single installer can complete the installation, and the installation is simple and convenient.
In this embodiment, the bearing post 10 and the supporting rod 12 are generally made of high-quality carbon steel, and after heat treatment or surface treatment, the surfaces of the cone pit 100 and the hollow sphere 123 have high precision, strength and hardness, so that the bearing post 10 and the hollow sphere 123 are not easy to wear or crack after long-term contact swing friction, and the service life of the swing pair is long.
In this embodiment, the hollow sphere 123 is generally fixedly sleeved on the first column 122 by an interference fit or glue bonding. In operation, the hollow ball table 123 can swing freely relative to the cone pit 100, and the support rod 12 swings accordingly, so that the purpose of a shaking pair is achieved.
In addition, for convenience, the socket post 124 is fixedly sleeved in the retainer ring 11, as shown in fig. 1 and 2, in this embodiment, a first chamfer 1241 is provided at a corner of the bottom end surface of the socket post 124. When in sleeving, the steel wire retainer ring 13 is firstly placed in the first annular groove 110, then the sleeving column 124 is sleeved in the retainer ring 11, at the moment, the steel wire retainer ring 13 enters into a containing cavity formed by the first annular groove 110 and the second annular groove 1240 through the first chamfer 1241, so that the sleeving column 124 and the retainer ring 11 are fixed, and the support rod 12 and the bearing column 10 can be fixed.
In order to facilitate the removal of the socket post 124 from the retainer ring 11, as shown in fig. 1 and 2, in this embodiment, a second chamfer 1242 is provided on the second annular groove 1240 at a side corner position near the bottom end surface of the socket post 124. During disassembly, the sleeve-connecting column 124 is pulled out of the retainer ring 11 with force, at this time, the steel wire retainer ring 13 is pulled out of the accommodating cavity formed by the first annular groove 110 and the second annular groove 1240 through the second chamfer 1242, so that the sleeve-connecting column 124 can be pulled out of the retainer ring 11, and the disassembly and separation of the support rod 12 and the bearing column 10 can be realized.
In this embodiment, as shown in fig. 1, the wire retainer ring 13 is usually an open wire retainer ring, so as to facilitate assembly and disassembly.
In this embodiment, as shown in fig. 1, the bearing post 10 and the retainer ring 11 are both cylindrical, and the retainer ring 11 can be fixedly sleeved in the slot 101 in the bearing post 10 by interference fit or glue adhesion. Of course, in other embodiments, the bearing post 10 and the retainer ring 11 may be designed in other shapes, for example, the bearing post 10 may be designed as a polygonal post such as a square post or a hexagonal post, the slot 101 in the bearing post 10 may be designed as a polygonal hole, and the structure of the retainer ring 11 may be designed accordingly.
In this embodiment, as shown in fig. 1, the inner hole of the retaining ring 11 is a circular hole, and the socket post 124 is correspondingly designed into a cylindrical shape.
In this embodiment, as shown in fig. 1, the first column 122 is designed as a cylinder, and accordingly, the inner hole of the hollow sphere 123 is a cylindrical hole. Of course, in other embodiments, the first column 122 may be designed into other column shapes, such as a quadrangular column, a hexagonal column, etc., and the inner hole of the hollow sphere 123 is correspondingly formed to fixedly socket on the first column 122.
In the present application, the polygonal body 121 is mainly used to rotate the support rod 12 when installing the rocking pair to fix the rocking pair at a corresponding position, which corresponds to the function of a screw head. As shown in fig. 1 and 2, in this embodiment, the polygon 121 is a hollow hexagon. Of course, in other embodiments, the polygon 121 may be designed in other shapes, and the polygon may be disassembled or assembled by rotating the polygon with a corresponding mounting tool.
As shown in fig. 3 to 4, in the second embodiment, the rocking pair comprises a bearing post 20, a retainer ring 21, a supporting rod 22 and a steel wire retainer ring 23, wherein the bearing post 20 is recessed downwards from the center of the top surface to form a coaxial cone pit 200, and a slot 201 coaxial with the cone pit 200 and penetrating the bottom surface of the bearing post 20 is formed at the small diameter end of the cone pit 200; the retainer ring 21 is fixedly sleeved in the slotted hole 201, and a first annular groove 210 is formed in the inner wall surface of the retainer ring 21; the supporting rod 22 comprises a stud 220, a polygonal body 221 arranged at one end of the stud 220, and a ball table sleeving part arranged at the other end of the stud 220, the ball table sleeving part comprises a ball table part and a sleeving column 223, the ball table part comprises a solid ball table 222 connected with the stud 220, the spherical surface of the solid ball table 222 is movably contacted with the inner wall surface of the conical pit 200, the sleeving column 223 is connected with the other end of the solid ball table 222 and is matched and sleeved in the retainer ring 21, a second annular groove 2230 is formed on the outer wall surface of the sleeving column 223 at a position corresponding to the first annular groove 210, a first movable gap 240 exists between the bottom surface of the sleeving column 223 and the bottom surface of the retainer ring 21 when the sleeving column 223 is fixedly sleeved in the retainer ring 21, and a second movable gap 241 exists between the retainer ring 21 and the bottom surface of the ball table part, and the steel wire retainer ring 23 is arranged in a containing cavity formed by the first annular groove 210 and the second annular groove 2230 so as to realize the fixed sleeving of the retainer ring 21 and the sleeving column 223.
In actual use, as shown in fig. 3, the bearing post 20 in the shaking pair is fixedly installed in the installation hole 250 of the air cushion 25, when the supporting rod 22 is installed on the bearing post 20, the spherical surface of the solid ball table 222 on the supporting rod 22 is movably contacted with the inner wall surface of the cone pit 200, the sleeve joint post 223 on the supporting rod 22 is sleeved and fixed in the baffle ring 21 in the bearing post 20, a first movable gap 240 exists between the bottom surface of the sleeve joint post 223 and the bottom surface of the baffle ring 21, and a second movable gap 241 exists between the baffle ring 21 and the bottom surface of the ball table part, at this time, the solid ball table 222 can freely swing relative to the cone pit 200, so as to realize the purpose of the shaking pair.
Similarly to the first embodiment, in this embodiment, the spherical surface of the solid spherical platform 222 is movably contacted with the inner wall surface of the cone pit 200, meanwhile, a first movable gap 240 exists between the bottom surface of the socket post 223 and the bottom surface of the retainer ring 21, and a second movable gap 241 exists between the retainer ring 21 and the bottom surface of the spherical platform part, so as to meet the requirement of free swinging, and the solid spherical platform 222 is contacted with the cone pit 200 without excessively requiring surface contact, so that the manufacturing and processing process is relatively simple; and the sleeve joint column 223 on the support rod 22 is fixedly sleeved with the baffle ring 21 through the steel wire check ring 23, so that the support rod 22 is not easy to separate from the bearing column 20, and the structure is stable, and the installation is simple and convenient.
Similarly to the first embodiment, in this embodiment, the bearing post 20 and the support rod 22 are generally made of high-quality carbon steel, and after heat treatment or surface treatment, the surfaces of the cone pit 200 and the solid ball table 222 have high precision, strength and hardness, so that the bearing post 20 and the solid ball table 222 are not easy to wear or crack after long-term contact and swing friction, so that the service life of the shaking pair is long.
Similarly to the first embodiment, in order to facilitate the fixed sleeving of the sleeving post 223 in the retainer ring 21 and the taking out of the sleeving post 223 from the retainer ring 21, as shown in fig. 3 and 4, a first chamfer 2231 is provided at the corner of the bottom end surface of the sleeving post 223, and a second chamfer 2232 is provided at the corner of the side of the second annular groove 2230 near the bottom end surface of the sleeving post 223. The sleeving and dismantling process can be referred to the description of the first embodiment, and will not be repeated here.
Of course, in other embodiments, a first chamfer 2231 may be provided only at the bottom end surface corners of the socket post 223, so that the support post 22 and the load post 20 may be used with long-term cooperation.
In this embodiment, as shown in fig. 3, the wire retainer 23 is usually an open wire retainer to facilitate assembly and disassembly.
In this embodiment, as shown in fig. 3, the force-bearing post 20 and the retainer ring 21 are both cylindrical, and the retainer ring 21 can be fixedly sleeved in the slot 201 in the force-bearing post 20 by interference fit or glue adhesion. Of course, in other embodiments, the bearing post 20 and the retainer ring 21 may be designed in other shapes, for example, the bearing post 20 may be designed in a polygonal column shape such as a quadrangular column shape or a hexagonal column shape, the slot 201 in the bearing post 20 may be designed in a polygonal hole shape, and the structure of the retainer ring 21 may be designed accordingly.
In this embodiment, as shown in fig. 3, the inner hole of the retainer ring 21 is a circular hole, and the socket post 223 is designed into a cylindrical shape accordingly.
As shown in fig. 5 to 6, in the third embodiment, the rocking pair comprises a bearing post 30, a retainer ring 31, a supporting rod 32 and a steel wire retainer ring 33, wherein the bearing post 30 is recessed downwards from the center of the top surface to form a coaxial cone pit 300, and a slot 301 coaxial with the cone pit 300 and penetrating the bottom surface of the bearing post 30 is formed at the small diameter end of the cone pit 300; the retainer ring 31 is fixedly sleeved in the slot 301, and a first annular groove 310 is formed in the inner wall surface of the retainer ring 31; the supporting rod 32 comprises a stud 320, a polygonal body 321 arranged at one end of the stud 320, and a ball table sleeving part arranged at the other end of the stud 320, the ball table sleeving part comprises a ball table part and a sleeving column 324, the ball table part comprises a second column 322 connected with the stud 320 and a hemispherical table 323 arranged at the other end of the second column 322, the spherical surface of the hemispherical table 323 is in movable contact with the inner wall surface of the conical pit 300, the sleeving column 324 is connected with the other end of the hemispherical table 323 and is matched and sleeved in the retainer ring 31, a second annular groove 3240 is formed at the position corresponding to the first annular groove 310 on the outer wall surface of the sleeving column 324, a first movable gap 340 exists between the bottom surface of the sleeving column 324 and the bottom surface of the retainer ring 31 when the sleeving column 324 is fixedly sleeved in the retainer ring 31, a second movable gap 341 exists between the retainer ring 31 and the bottom surface of the ball table part, and the steel wire retainer ring 33 is arranged in a containing cavity formed by the first annular groove 310 and the second annular groove 3240 so as to realize the fixation of the retainer ring 31 and the sleeving column 324.
In actual use, as shown in fig. 5, the bearing post 30 in the shaking pair is fixedly installed in the installation hole 350 of the air cushion 35, when the supporting rod 32 is installed on the bearing post 30, the spherical surface of the hemispherical table 323 on the supporting rod 32 is movably contacted with the inner wall surface of the cone pit 300, the sleeve post 324 on the supporting rod 32 is sleeved and fixed in the retainer ring 31 in the bearing post 30, a first movable gap 340 exists between the bottom surface of the sleeve post 324 and the bottom surface of the retainer ring 31, and a second movable gap 341 exists between the retainer ring 31 and the bottom surface of the spherical table part, at this time, the solid spherical table can swing freely relative to the cone pit 300, so as to realize the purpose of the shaking pair.
Similarly to the first embodiment, in this embodiment, the spherical surface of the hemispherical table 323 is movably contacted with the inner wall surface of the cone pit 300, meanwhile, a first movable gap 340 exists between the bottom surface of the socket post 324 and the bottom surface of the retainer ring 31, and a second movable gap 341 exists between the retainer ring 31 and the bottom surface of the table portion, for example, the requirement of free swinging is met, and the hemispherical table 323 is contacted with the cone pit 300 without excessively requiring surface contact, so that the manufacturing and processing process is relatively simple; and the sleeve joint post 324 on the support rod 32 is fixedly sleeved with the retainer ring 31 through the steel wire retainer ring 33, so that the support rod 32 is not easy to separate from the bearing post 30, and the structure is stable, and the installation is simple and convenient.
Similarly to the first embodiment, in this embodiment, the bearing post 30 and the support rod 32 are generally made of high-quality carbon steel, and after heat treatment or surface treatment, the surfaces of the cone pit 300 and the hemispherical table 323 have high precision, strength and hardness, so that the bearing post 30 and the hemispherical table 323 are not easy to wear or crack after long-term contact and swing friction, so that the service life of the swing pair is longer.
Similarly to the first embodiment, in order to facilitate the fixing and sleeving of the sleeve-shaped post 324 in the retainer ring 31 and the taking-out of the sleeve-shaped post 324 from the retainer ring 31, as shown in fig. 5 and 6, a first chamfer 3241 is provided at the corner of the bottom end surface of the sleeve-shaped post 324, and a second chamfer 3242 is provided at the corner of the side of the second annular groove 3240 near the bottom end surface of the sleeve-shaped post 324. The sleeving and dismantling process can be referred to the description of the first embodiment, and will not be repeated here.
Of course, in other embodiments, a first chamfer 3241 may be provided only at the bottom end corners of the socket posts 324, such that the support bar 32 and the load post 30 may be used with long-term cooperation.
In this embodiment, as shown in fig. 5, the wire retainer 33 is usually an open wire retainer to facilitate assembly and disassembly.
In this embodiment, as shown in fig. 5, the force-bearing post 30 and the retainer ring 31 are both cylindrical, and the retainer ring 31 can be fixedly sleeved in the slot 301 in the force-bearing post 30 by interference fit or glue adhesion. Of course, in other embodiments, the bearing post 30 and the retainer ring 31 may be designed in other shapes, for example, the bearing post 30 may be designed as a polygonal post such as a square post or a hexagonal post, the slot 301 in the bearing post 30 may be designed as a polygonal hole, and the structure of the retainer ring 31 may be designed accordingly.
In this embodiment, as shown in fig. 5, the inner hole of the retainer ring 31 is a circular hole, and the socket post 324 is correspondingly designed into a cylindrical shape.
In this embodiment, as shown in fig. 5, the second cylinder 322 is designed in a cylindrical shape. Of course, in other embodiments, the second post 322 may be configured in other post shapes, such as a square post, a hexagonal post, etc.
In three different embodiments provided in the present application, one end of the table portion is connected with the stud, and the table portion is movably contacted with the inner wall surface of the cone pit, where the difference between the embodiments is that the design of the table portion is different, and of course, in other embodiments, the table portion may be implemented by using other similar schemes.
The application also provides an air bearing assembly, as shown in fig. 7 and 8, which comprises the shaking pair and an air cushion 4, wherein a mounting hole for fixedly mounting a bearing column is arranged at the back of the working surface of the air cushion 4.
Typically, the force-bearing column on the shaking pair is fixed in the mounting hole by interference fit or glue adhesion, and the structure of the force-bearing column is matched with that of the mounting hole, for example, when the mounting hole is designed to be cylindrical, the force-bearing column is correspondingly designed to be cylindrical.
The air cushion of the application can be realized by adopting the air cushion 4 shown in fig. 7 and 8, specifically, the working surface of the air cushion 4 is provided with a pressure equalizing groove 40, the pressure equalizing groove 40 is formed by downwards sinking from the working surface of the air cushion 4, a plurality of round tube mounting holes 41 are formed in the pressure equalizing groove 40, a short round tube 42 is fixedly arranged in the round tube mounting holes 41, a first slotted hole 420 and a second slotted hole 421 which are coaxially and penetratingly communicated are formed in the central position of the short round tube 42, the inner diameter of the first slotted hole 420 is smaller than the inner diameter of the second slotted hole 421, a ruby bearing 43 is fixedly arranged in the second slotted hole 421, an orifice 430 communicated with the first slotted hole 420 is formed in the central position of the ruby bearing 43, the end face of the ruby bearing 43 is flush with the end face of the short round tube 42, and an air cavity 44 is formed between the end face of the ruby bearing 43 and the working surface of the air cushion 4; an air passage 45 is arranged in the air cushion 4, and the air passage 45 is communicated with the first slotted hole 420; the side surface of the air cushion 4 is provided with at least one threaded hole 46 which is communicated with the air passage 45 and used for installing the screwed plug 5 and a nozzle hole 47 which is communicated with the air passage 45 and used for installing a nozzle.
Before working, the air bearing assembly is installed and fixed, the screwed hole 46 is provided with the screwed plug 5, and the nozzle hole 47 is connected with the nozzle; during operation, air is introduced into the air passage 45 of the air cushion 4 through the connector, the air cushion 4 can be opened for operation, in the working process, the air bearing assembly can cause the swinging of the air cushion 4 under the influence of a contact surface or other factors, and at the moment, the pair of swinging is swung to adjust the position of the air cushion 4, so that the air cushion 4 stably works, and the air bearing assembly works normally.
In this embodiment, as shown in fig. 7 and 8, the air cushion 4 is rectangular, the pressure equalizing groove 40 includes four pressure dividing grooves parallel to four sides on the working surface of the air cushion 4 and intersecting each other perpendicularly, the circular tube mounting hole 41 is located at the intersecting position of the pressure dividing grooves, the short circular tube 42 is fixed in the circular tube mounting hole 41 in an interference fit manner, and the ruby bearing 43 is fixed in the second slot 421 in an interference fit manner.
Of course, those of ordinary skill in the art will appreciate that the cushion of the present application may be implemented using other configurations of cushions. For example, in some embodiments, the air cushion may be designed into a cylinder shape, the pressure equalizing groove may be designed into a circular ring shape, the circular tube mounting holes are uniformly distributed on the pressure equalizing groove, and the structures such as the short circular tube, the ruby bearing, the air cavity, the air passage, the threaded hole, the nozzle hole and the like may be designed correspondingly. Of course, in other embodiments, the air cushion may be designed into other shapes, such as a hexagon, etc., and may be specifically designed according to practical needs.
In the scheme of the invention, the shaking pair comprises a bearing column, a retainer ring, a supporting rod and a steel wire retainer ring, when the supporting rod is connected with the bearing column, the spherical surface of a spherical table part on the supporting rod is in movable contact with the inner wall surface of a cone pit, a sleeved column on the supporting rod is sleeved and fixed in the retainer ring in the bearing column, a first movable gap exists between the bottom surface of the sleeved column and the bottom surface of the retainer ring, and a second movable gap exists between the retainer ring and the bottom surface of the spherical table part, so that the spherical table part can freely swing relative to the cone pit to meet the requirement of free swing, the spherical table part is in contact with the cone pit without excessively requiring surface contact, the processing is relatively easy, and the manufacturing is simple. And cup joint the post on the bracing piece and pass through steel wire retaining ring and the fixed cup joint of retaining ring, the bracing piece can not break away from the bearing post, its stable in structure installs when three coordinate measuring machine uses with it, and single installer can accomplish the installation, and the installation is simple and convenient, satisfies the user demand.
The above-mentioned preferred embodiments should be regarded as illustrative examples of embodiments of the present application, and all such technical deductions, substitutions, improvements made on the basis of the same, similar or similar embodiments of the present application should be regarded as the protection scope of the present patent.
Claims (10)
1. A rocking pair, comprising:
the bearing column is downwards recessed from the center of the top surface to form a coaxial cone pit, and a slotted hole which is coaxial with the cone pit and penetrates through the bottom surface of the bearing column is formed at the small-diameter end of the cone pit;
The retaining ring is fixedly sleeved in the slotted hole, and a first annular groove is formed in the inner wall surface of the retaining ring;
The supporting rod comprises a stud, a polygonal body arranged at one end of the stud and a ball table sleeving part arranged at the other end of the stud, wherein the ball table sleeving part comprises a ball table part connected with the stud and in movable contact with the inner wall surface of the cone pit and a sleeving column connected with the ball table part and matched with and sleeved in the retainer ring, a second annular groove is formed on the outer wall surface of the sleeving column at a position corresponding to the first annular groove, and a first movable gap exists between the bottom surface of the sleeving column and the bottom surface of the retainer ring and a second movable gap exists between the retainer ring and the bottom surface of the ball table part when the sleeving column is fixedly sleeved in the retainer ring;
and the steel wire check ring is arranged in a containing cavity formed by the first annular groove and the second annular groove so as to realize the fixed sleeving of the check ring and the sleeving part.
2. The rocking pair of claim 1, wherein the socket post has a first chamfer at a bottom end face corner.
3. The rocking pair of claim 2, wherein a second chamfer is provided on the second annular groove at a side corner position adjacent to the bottom end face of the socket post.
4. A rocking pair according to any one of claims 1 to 3, wherein the table portion comprises a first column connected to the stud and a hollow table fixedly sleeved on the first column, and the spherical surface of the hollow table is in movable contact with the inner wall surface of the cone pit.
5. The rocking pair of claim 4, wherein the hollow sphere is fixedly sleeved on the first column body by means of interference fit or glue bonding.
6. A rocking pair according to any one of claims 1 to 3, wherein the table portion comprises a solid table to which the stud is attached, the spherical surface of the solid table being in movable contact with the inner wall surface of the cone pit.
7. A rocking pair according to any one of claims 1 to 3, wherein the table portion comprises a second column connected by the stud and a hemispherical table provided at the other end of the second column, and the spherical surface of the hemispherical table is in movable contact with the inner wall surface of the cone pit.
8. The rocking pair of claim 1, wherein the inner hole of the retainer ring is a circular hole, and the socket post is cylindrical.
9. An air bearing assembly comprising a rocking pair as claimed in any one of claims 1 to 8 and an air cushion, wherein a mounting hole for fixedly mounting the load bearing post is provided in the centre of the back of the working surface of the air cushion.
10. The air bearing assembly according to claim 9, wherein a pressure equalizing groove is formed in the working surface of the air cushion, the pressure equalizing groove is formed by sinking downwards from the working surface of the air cushion, a plurality of circular tube mounting holes are formed in the pressure equalizing groove, a short circular tube is fixedly arranged in the circular tube mounting holes, a first slotted hole and a second slotted hole which are coaxially and penetratingly communicated are formed in the central position of the short circular tube, the inner diameter of the first slotted hole is smaller than the inner diameter of the second slotted hole, a ruby bearing is fixedly arranged in the second slotted hole, an orifice communicated with the first slotted hole is formed in the center of the ruby bearing, the end face of the ruby bearing is flush with the end face of the short circular tube, and an air cavity is formed between the end face of the ruby bearing and the working surface of the air cushion; an air passage is arranged in the air cushion and is communicated with the first slotted hole; the side of the air cushion is provided with at least one first threaded hole which is communicated with the air passage and used for installing a screwed plug and a nozzle hole which is communicated with the air passage and used for installing a nozzle, and the first threaded hole and the nozzle hole are communicated with the air passage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010099160.1A CN111188828B (en) | 2020-02-18 | 2020-02-18 | Shaking pair and air bearing assembly using same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010099160.1A CN111188828B (en) | 2020-02-18 | 2020-02-18 | Shaking pair and air bearing assembly using same |
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| Publication Number | Publication Date |
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| CN111188828A CN111188828A (en) | 2020-05-22 |
| CN111188828B true CN111188828B (en) | 2024-08-13 |
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| CN202010099160.1A Active CN111188828B (en) | 2020-02-18 | 2020-02-18 | Shaking pair and air bearing assembly using same |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN211715527U (en) * | 2020-02-18 | 2020-10-20 | 深圳力合精密装备科技有限公司 | Rocking pair and air bearing assembly using same |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4404307B2 (en) * | 2004-04-27 | 2010-01-27 | 武蔵精密工業株式会社 | Ball joint |
| DE102009026739A1 (en) * | 2009-06-04 | 2010-12-09 | Zf Friedrichshafen Ag | Joint and / or bearing arrangement with an elastic intermediate layer |
| CN202746363U (en) * | 2012-08-01 | 2013-02-20 | 齐齐哈尔轨道交通装备有限责任公司 | Anti-theft pin for track freight car |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN211715527U (en) * | 2020-02-18 | 2020-10-20 | 深圳力合精密装备科技有限公司 | Rocking pair and air bearing assembly using same |
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| CN111188828A (en) | 2020-05-22 |
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