CN217631548U - Rotating table rotating around virtual shaft - Google Patents

Abstract

The utility model discloses a rotating platform rotating around a virtual shaft, which comprises a base, a driving mechanism, a rotary support, an object stage, a bottom connecting seat, a rotating object, a top hinging seat and a top bracket; the base is fixedly connected with the civil embedded part, and the top support is fixedly arranged above the base; the driving mechanism and the rotary support are installed on the base, the output end of the driving mechanism is connected with the rotary support, the rotary support is connected with the objective table, and the upper end and the lower end of the rotary object are respectively connected with the objective table and the top support through the top hinged seat and the bottom connecting seat. The advantages are that: the rotating platform is not provided with a middle shaft, an upper auxiliary supporting point is added to form a virtual shaft, the bottom mounting area is reduced, the structural stress is simple, the number of parts is reduced, the number of materials is reduced, the processing and mounting are simple, the movement is reliable, the use is flexible, the debugging is convenient, and the system is more controllable.

Description

Rotating table rotating around virtual shaft

Technical Field

The utility model relates to the technical field of machinery, especially, relate to a revolving stage around virtual axle is rotatory.

Background

The rotating platform is a device for carrying and rotating an object, and is mainly used for solving the problems of rotation and bearing of the object. In general, in the transmission aspect, torque is mainly transmitted to a carrying plate of a rotating table through an intermediate transmission device to drive the carrying plate to rotate, so that an object is driven to rotate; in the bearing aspect, the pressure of the object on the loading plate is also effectively transmitted to the bottom of the rotating platform through the intermediate device, and finally transmitted to the ground or other table top for bearing the rotating platform. The rotary tables are various in types, and are divided from the structural appearance, and mainly comprise two types of rotary tables, one type is a rotary table with a large horizontal area, such as a rotary stage and a rotary exhibition stand, and the other type is a rotary table with a large vertical height, such as a truck crane. With the continuous development of science and technology, in the field of displaying large-volume and large-mass objects, the rotating platform with large size (more than 30m diameter or more than 10m height) and large load (more than 20T load) is widely applied. However, for the rotating platform with larger height (lateral wind load) and large load, two technical schemes are mainly adopted, one is a middle shaft transmission and bearing technical scheme, the rotating platform generated by the scheme has larger requirements on the pressure resistance and the torque resistance of each part, and the requirements are more obvious when the rotating platform is large in height and large load. The second solution is a gear ring (rotary bearing) transmission and bearing technical solution, and the rotary table produced by this solution needs to increase the size of the gear ring and its bearing capacity correspondingly when increasing the height and bearing weight, thus increasing the manufacturing cost of the large gear ring, and in addition, the pressure of the object in this solution will be concentrated on the gear ring through the carrying plate, and the center of the gear ring is not supported, therefore, the pressure resistance of the carrying plate needs to be increased virtually, thus the material and manufacturing cost of the rotary table will be increased, and its self weight is also larger. Both of these solutions have the problems of high manufacturing cost and unlimited installation base area.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a revolving stage around virtual axle is rotatory to solve the aforementioned problem that exists among the prior art.

In order to realize the purpose, the utility model discloses a technical scheme as follows:

a rotary table rotating around a virtual shaft comprises a base, a driving mechanism, a rotary support, an object stage, a bottom connecting seat, a rotating object, a top hinging seat and a top support; the base is fixedly connected with the civil embedded part, and the top support is fixedly arranged above the base; the driving mechanism and the rotary support are installed on the base, the output end of the driving mechanism is connected with the rotary support, the rotary support is connected with the objective table, and the upper end and the lower end of the rotary object are connected with the objective table and the top support through the top hinged seat and the bottom connecting seat respectively.

Preferably, the drive mechanism includes a reduction motor and a pinion gear mounted on an output shaft of the reduction motor, the pinion gear being meshed with the slewing support.

Preferably, the rotary support comprises a stator ring and a rotor ring which are coaxially arranged from inside to outside, the stator ring is installed on the base, the rotor ring is meshed with the pinion, and the rotor ring is connected with the objective table.

Preferably, the object stage comprises an object carrying connecting seat and an object carrying plate, a lower flange of the object carrying connecting seat is connected with the rotor ring, an upper flange of the object carrying connecting seat is connected with the object carrying plate, and the object carrying plate is connected with the lower end of the rotating object through the bottom connecting seat.

Preferably, the bottom connecting seat comprises a universal joint and an adjustable supporting rod, the upper end and the lower end of the universal joint are respectively connected with the lower ends of the object carrying plate and the adjustable supporting rod, and the upper end of the adjustable supporting rod is connected with the lower end of the rotating object.

Preferably, the adjustable support rod comprises a fixed shaft rod, a movable shaft rod, an adjusting nut sleeve, an upper locking nut and a lower locking nut; the moving shaft lever is hollow and two ends of the moving shaft lever are opened; the lower end of the fixed shaft lever is connected with the upper end of the universal joint of the cross shaft, and the upper end of the fixed shaft lever extends into the movable shaft lever through the lower end of the movable shaft lever and is buckled and connected with the movable shaft lever; the upper part and the lower part of the inner wall of the adjusting nut sleeve are respectively provided with internal threads with opposite turning directions, the outer wall of the moving shaft lever and the outer wall of the moving shaft lever are respectively provided with external threads with opposite turning directions, and the upper part and the lower part of the inner wall of the adjusting nut sleeve are respectively correspondingly meshed with the outer wall of the moving shaft lever and the outer wall of the fixed shaft lever, so that the adjusting nut sleeve is sleeved on the peripheries of the moving shaft lever and the fixed shaft lever; an upper locking nut and a lower locking nut are respectively meshed with the movable shaft lever and the fixed shaft lever and respectively abutted against the upper end and the lower end of the adjusting nut sleeve; the upper end of the moving shaft lever is connected with the lower end of the rotating object.

Preferably, the fixed shaft rod is a stepped shaft composed of an upper shaft section, a lower shaft section and a shaft seat which are coaxially and sequentially arranged from top to bottom, the diameter of the upper shaft section is smaller than that of the lower shaft section, an external tooth spline is arranged on the outer wall of the upper shaft section, and an external thread is arranged on the outer wall of the lower shaft section; the upper shaft section extends into the moving shaft rod through the lower end of the moving shaft rod and is connected with the moving shaft rod in a buckling mode through the external tooth spline; the external thread on the lower shaft section is meshed with the internal thread on the lower part of the inner wall of the adjusting nut sleeve, and the lower locking nut is meshed on the lower shaft section.

Preferably, the top hinged seat comprises an installation shaft, a thrust self-aligning roller bearing, a clamping ring, a bearing spacer bush, a bearing outer sleeve, a lower gland, an upper gland, an installation seat and a connecting bolt; the mounting seat is connected with the top support, the mounting seat is hollow and two ends of the mounting seat are open, the upper gland and the lower gland respectively cover the upper end and the lower end of the mounting seat correspondingly, one end of the mounting shaft extends into the mounting seat, and the other end of the mounting shaft penetrates through the lower gland and extends out of the mounting seat to be connected with the upper end of the rotating object; two opposite thrust self-aligning roller bearings are arranged on the mounting shaft in a spacing sleeve mode and respectively abut against the upper gland and the lower gland; a bearing spacer bush is sleeved on the mounting shaft between the two thrust self-aligning roller bearings, and two ends of the bearing spacer bush respectively abut against the two thrust self-aligning roller bearings; the thrust self-aligning roller bearing and the bearing spacer sleeve are sleeved with bearing outer sleeves, and the upper end and the lower end of each bearing outer sleeve respectively abut against the upper gland and the lower gland; the upper gland, the bearing outer sleeve, the lower gland and the mounting seat are fixedly connected together through the connecting bolt.

Preferably, the mounting shaft is a stepped shaft composed of a first shaft section, a tool withdrawal groove, a second shaft section and a third shaft section which are coaxially and sequentially arranged; the diameters of the first shaft section and the second shaft section are the same and are larger than the diameter of the tool withdrawal groove, and the diameter of the third shaft section is larger than the diameters of the first shaft section and the second shaft section; the first shaft section and the second shaft section are respectively sleeved with a thrust self-aligning roller bearing, the tool withdrawal groove is sleeved with a clamping ring, and the clamping ring extends into the bearing spacer sleeve and is fixedly connected with the bearing spacer sleeve; the third shaft section penetrates through the lower gland to extend out of the mounting seat and is connected with the upper end of the rotating object, and the self-aligning thrust roller bearing sleeved on the second shaft section is separated from the third shaft section by a certain distance.

Preferably, the bearing spacer comprises a first connecting section and a second connecting section which are coaxially and sequentially arranged, the outer diameters of the first connecting section and the second connecting section are equal, and the inner diameter of the first connecting section is smaller than that of the second connecting section; the first connecting section is sleeved on the periphery of the first shaft section, the periphery of the second connecting section is sleeved on the periphery of the tool withdrawal groove, and the outer wall of the clamping ring is in contact fit with the inner wall of the second connecting section.

The utility model has the advantages that: the rotating platform is not provided with a middle shaft, an upper auxiliary supporting point is added to form a virtual shaft, the bottom mounting area is reduced, the structural stress is simple, the number of parts is reduced, the number of materials is reduced, the processing and mounting are simple, the movement is reliable, the use is flexible, the debugging is convenient, and the system is more controllable.

Drawings

FIG. 1 is a schematic structural view of a turntable according to an embodiment of the present invention;

FIG. 2 is an enlarged view of FIG. 1 at A according to an embodiment of the present invention;

FIG. 3 is a schematic structural view of a pivoting support according to an embodiment of the present invention;

fig. 4 is a schematic structural view of the object carrying connection seat in the embodiment of the present invention;

fig. 5 is a schematic structural view of a carrier plate according to an embodiment of the present invention;

fig. 6 is a schematic structural view of a universal joint pin joint according to an embodiment of the present invention;

FIG. 7 is a cross-sectional view of an adjustable support rod in an embodiment of the present invention;

FIG. 8 is an exploded view of an adjustable support rod in an embodiment of the present invention;

fig. 9 is a cross-sectional view of a top hinge mount in an embodiment of the invention;

fig. 10 is an exploded view of a top hinged mount in an embodiment of the invention.

In the figure: 1. a base; 2. a drive mechanism; 21. a reduction motor; 22. a pinion gear; 3. a rotary support; 31. a rotor ring; 32. a stator ring; 4. an object stage; 41. a loading connecting seat; 42. a loading plate; 5. a bottom connecting seat; 51. a cross-pin universal joint; 52. an adjustable support rod; 521. fixing the shaft lever; 522. a lower lock nut; 523. adjusting the nut sleeve; 524. locking the nut; 525. moving the shaft lever; 6. a rotating object; 7. a top hinged seat; 71. installing a shaft; 72. a lower gland; 73. a connecting bolt; 74. a mounting seat; 75. a thrust self-aligning roller bearing; 76. a collar; 77. a bearing spacer bush; 78. a bearing outer sleeve; 79. a gland is arranged; 8. a top support.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the invention, are given by way of illustration only.

As shown in fig. 1 and 2, the present embodiment provides a rotating platform rotating around a virtual axis, which includes a base 1, a driving mechanism 2, a rotary support 3, an object stage 4, a bottom connecting seat 5, a rotator 6, a top hinge seat 7 and a top bracket 8; the base 1 is fixedly connected with a civil embedded part, and the top support 8 is fixedly arranged above the base 1; actuating mechanism 2 with the gyration is supported 3 and is installed on the base 1, actuating mechanism 2's output with the gyration is supported 3 and is linked to each other, the gyration support 3 with objective table 4 links to each other, the upper and lower both ends of rotator 6 link to each other with objective table 4 and top support 8 through articulated seat 7 in top and bottom connecting seat 5 respectively.

The base 1 and the top support 8 form a fixed frame part of the rotating platform, the fixed frame part is a static component of the rotating platform, wherein the base 1 is used as a base for supporting the rotating platform and is positioned at the lowest part of the rotating platform and mainly bears the pressure of the rotating platform, and the top support 8 is arranged at the uppermost part of the rotating platform and provides auxiliary support for the rotating platform and resists the lateral force of the rotating platform; the object stage 4, the bottom connecting seat 5 and the rotating object 6 form a rotating component which is a bearing object of the rotating platform; the slewing bearing and the top hinging seat 7 are connecting elements between a static component and a rotary motion component, the inner ring of the slewing bearing is connected with the base 1, the outer ring of the slewing bearing is connected with the lower part of the rotary motion component, a mounting shaft 71 of the top hinging seat 7 is connected with the upper part of the rotary motion component, and a mounting seat 74 of the top hinging seat 7 is connected with the top bracket 8; the outer ring of the slewing bearing, the rotary motion component and the mounting shaft 71 of the top hinging seat 7 form a virtual shaft and rotate together; in practical application, the driving mechanism 2 drives the outer ring of the rotary support 3 to rotate, so as to drive the rotary motion member to rotate. The rotating platform is not provided with a middle shaft, an upper auxiliary supporting point is added to form a virtual shaft, the bottom mounting area is reduced, the structure stress is simple, the number of parts is reduced, the number of materials is reduced, the processing and mounting are simple, the movement is reliable, the use is flexible, and the system is more controllable in debugging.

The following is a detailed description of each component of the rotary table:

1. base 1

In this embodiment, the base 1 includes a base, a speed reduction motor fixing seat and a rotation support fixing seat, the base is fixedly connected with the civil engineering embedded part, and the speed reduction motor fixing seat and the rotation support fixing seat are arranged on the base. The base 1 is the bearing seat of the turntable and ultimately transmits torque and pressure to the floor or other surface on which the turntable is carried.

2. Drive mechanism 2

In the present embodiment, the driving mechanism 2 includes a reduction motor 21 and a pinion gear 22, the pinion gear 22 is mounted on an output shaft of the reduction motor 21, and the pinion gear 22 is engaged with the slewing support 3. The driving mechanism 2 is mainly used for transmitting motor torque to drive the rotating object 6 to rotate. The reduction motor 21 may be mounted on the reduction motor holder.

3. Slewing support 3

As shown in fig. 3, in the present embodiment, the rotary support 3 includes a stator ring 32 and a rotor ring 31 coaxially disposed from inside to outside, the stator ring 32 is mounted on the rotary support fixing seat of the base 1, the rotor ring 31 is engaged with the pinion 22, and the rotor ring 31 is connected to the stage 4. The inner ring of the rotary support 3 is a stator ring 32, and the outer ring is a rotor ring 31. The inner ring mainly carries the pressure of the rotor 6 and the outer ring serves to transmit the rotational torque and the upper pressure to the inner ring.

4. Object stage 4

As shown in fig. 4 and 5, in this embodiment, the object stage 4 includes an object connecting seat 41 and an object plate 42, a lower flange of the object connecting seat 41 is connected to the rotor ring 31, an upper flange of the object connecting seat 41 is connected to the object plate 42, and the object plate 42 is connected to a lower end of the rotator 6 through a bottom connecting seat 5. The object stage 4 is used for carrying the rotating object 6 and transmitting the rotating torque to enable the rotating object 6 to rotate.

5. Bottom connecting base 5

In this embodiment, the bottom connecting seat 5 includes a universal joint 51 and an adjustable support rod 52, an upper end and a lower end of the universal joint 51 are respectively connected to the lower ends of the loading plate 42 and the adjustable support rod 52, and an upper end of the adjustable support rod 52 is connected to the lower end of the rotator 6. As shown in fig. 6, the universal joint 51 includes a cross shaft and a bearing seat mounted on the cross shaft, and upper and lower ends of the cross shaft are connected to lower ends of the carrier plate 42 and the adjustable support rod 52 through the bearing seat. The universal joint 51 is used for supporting an object and transmitting a rotation torque, and allows a certain deflection angle of a rotating shaft in an axial direction.

As shown in fig. 7 and 8, in the present embodiment, the adjustable support rod 52 includes a fixed shaft 521, a movable shaft 525, an adjusting nut sleeve 523, an upper locking nut 524, and a lower locking nut 522; the moving shaft rod 525 is hollow and two ends of the moving shaft rod are open; the lower end of the fixed shaft lever 521 is connected with the upper end of the universal joint 51, and the upper end of the fixed shaft lever 521 extends into the movable shaft lever 525 through the lower end of the movable shaft lever 525 and is connected with the movable shaft lever 525 in a buckling manner; the upper part and the lower part of the inner wall of the adjusting nut sleeve 523 are respectively provided with internal threads with opposite turning directions, the outer wall of the moving shaft lever 525 and the outer wall of the moving shaft lever 525 are respectively provided with external threads with opposite turning directions, and the upper part and the lower part of the inner wall of the adjusting nut sleeve 523 are respectively correspondingly meshed with the outer wall of the moving shaft lever 525 and the outer wall of the fixed shaft lever 521, so that the adjusting nut sleeve 523 is sleeved on the peripheries of the moving shaft lever 525 and the fixed shaft lever 521; an upper lock nut 524 and a lower lock nut 522 are respectively engaged with the movable shaft 525 and the fixed shaft 521, and the upper lock nut 524 and the lower lock nut 522 respectively abut against the upper end and the lower end of the adjusting nut sleeve 523; the upper end of the moving shaft 525 is connected to the lower end of the rotator 6.

In this embodiment, the fixed shaft lever 521 is a stepped shaft formed by an upper shaft section, a lower shaft section and a shaft seat which are coaxially and sequentially arranged from top to bottom, the diameter of the upper shaft section is smaller than that of the lower shaft section, an external tooth spline is arranged on the outer wall of the upper shaft section, and an external thread is arranged on the outer wall of the lower shaft section; the upper shaft section extends into the interior of the movable shaft rod 525 through the lower end of the movable shaft rod 525 and is connected with the movable shaft rod 525 in a buckling way through the external tooth spline; the external thread on the lower shaft section is meshed with the internal thread on the lower part of the inner wall of the adjusting nut sleeve 523, and the lower locking nut 522 is meshed on the lower shaft section.

The fixed shaft 521 can be a solid or hollow shaft according to actual needs. The fixed shaft lever 521 is a stepped shaft, the outer wall of the lower shaft section is processed into a left-hand external thread/a right-hand external thread, the outer wall of the upper shaft section is processed with an external tooth spline, the lower end of the lower shaft section is welded with a shaft seat,

the shaft seat comprises a shaft bottom flange and rib plates, the shaft bottom flange is fixedly connected with the lower end of the lower shaft section, and a plurality of rib plates are arranged on one side, close to the lower shaft section, of the shaft bottom flange at intervals along the circumferential direction of the lower shaft section. The shaft bottom flange is connected to the upper end of the universal joint cross 51.

The thread of the lower lock nut 522 is left-hand internal thread/right-hand internal thread for corresponding engagement with the external thread on the fixed shaft lever 521; the down-turning locking nut is located on the lower side of the adjusting nut sleeve 523 and can lock the adjusting nut sleeve 523 after being screwed down.

The movable shaft rod 525 comprises a shaft end flange and a connecting shaft section which are coaxially and fixedly connected from top to bottom in sequence, an internal spline is arranged on the inner wall of the connecting shaft section, and the external spline is correspondingly buckled and connected with the internal spline to ensure that the fixed shaft rod 521 is connected with the movable shaft rod 525; the outer wall of the connecting shaft section is provided with an external thread, the external thread on the connecting shaft section is meshed with the internal thread on the upper part of the inner wall of the adjusting nut sleeve 523, and the upper locking nut 524 is meshed on the connecting shaft section. The shaft end flange is connected with the lower end of the rotary object 6.

The movable shaft rod 525 is a hollow shaft tube, the outer wall of the movable shaft rod is processed into a right-handed external thread/a left-handed external thread, and the inner wall of the movable shaft rod is processed into an internal spline which is used for being matched and connected with an external spline on the fixed shaft rod 521 to transmit torque. The upper end is provided with a shaft end flange for connecting the bearing object.

The thread of the upper locking nut 524 is a right-handed internal thread/a left-handed internal thread, and is used for correspondingly meshing with the external thread on the fixed shaft lever 521; the upward screwing locking nut is positioned at the upper side of the adjusting nut sleeve 523 and can lock the adjusting nut sleeve 523 after being screwed.

There is a section of middle part without thread between the upper part and the lower part of the inner wall of the adjusting nut sleeve 523. The lower part of the inner wall of the adjusting nut sleeve 523 is processed into a left-hand internal thread which is connected with a left-hand external thread on the fixed shaft lever 521, and the upper part of the inner wall is processed into a right-hand internal thread which is connected with a right-hand external thread on the movable shaft lever 525; or, the lower part of the inner wall of the adjusting nut sleeve 523 is processed into a right-handed internal thread and connected with a right-handed external thread on the fixed shaft lever 521, and the upper part of the inner wall is processed into a left-handed internal thread and connected with a left-handed external thread on the movable shaft lever 525. The outer wall of the adjusting nut sleeve 523 can be clamped by a wrench to rotate, so that the length of the transmission shaft can be adjusted, and the axial force can be borne.

6. Rotating body 6

The shape and the displayed content of the rotator 6 can be set according to actual conditions so as to better meet the actual requirements.

7. Top hinged seat 7

As shown in fig. 9 and 10, in the present embodiment, the top hinge seat 7 includes a mounting shaft 71, a self-aligning thrust roller bearing 75, a collar 76, a bearing spacer 77, a bearing outer sleeve 78, a lower gland 72, an upper gland 79, a mounting seat 74 and a connecting bolt 73; the mounting seat 74 is connected with the top bracket 8, the mounting seat is hollow and two ends of the mounting seat are open, the upper gland 79 and the lower gland 72 respectively cover the upper end and the lower end of the mounting seat 74 correspondingly, one end of the mounting shaft 71 extends into the mounting seat 74, and the other end of the mounting shaft passes through the lower gland 72 and extends out of the mounting seat 74 to be connected with the upper end of the rotating object 6; two self-aligning thrust roller bearings 75 which are oppositely arranged are arranged on the mounting shaft 71 in a spaced manner, and the two self-aligning thrust roller bearings 75 are respectively abutted against the upper gland 79 and the lower gland 72; a bearing spacer 77 is sleeved on the mounting shaft 71 between the two self-aligning thrust roller bearings 75, and two ends of the bearing spacer 77 respectively abut against the two self-aligning thrust roller bearings 75; the self-aligning thrust roller bearing 75 and the bearing spacer 77 are sleeved with a bearing outer sleeve 78, and the upper end and the lower end of the bearing outer sleeve 78 are respectively abutted against the upper gland 79 and the lower gland 72; the upper gland 79, the bearing outer sleeve 78, the lower gland 72 and the mounting seat 74 are fixedly connected together by the connecting bolt 73.

The mounting shaft 71 is a bearing point in the bearing and is an object borne by the bearing seat. Two self-aligning thrust roller bearings 75, mounted face to face in the mount 74, can carry large bi-directional axial and radial loads.

The mounting shaft 71 is a stepped shaft composed of a first shaft section, a tool withdrawal groove, a second shaft section and a third shaft section which are coaxially and sequentially arranged; the diameters of the first shaft section and the second shaft section are the same and are larger than the diameter of the tool withdrawal groove, and the diameter of the third shaft section is larger than the diameters of the first shaft section and the second shaft section; a self-aligning thrust roller bearing 75 is respectively sleeved on the first shaft section and the second shaft section, a clamping ring 76 is sleeved on the tool withdrawal groove, and the clamping ring 76 extends into the bearing spacer 77 to be fixedly connected with the bearing spacer; the third shaft section penetrates through the lower gland 72 and extends out of the mounting seat 74 and is connected with the upper end of the rotating object 6, and the self-aligning thrust roller bearing 75 sleeved on the second shaft section is separated from the third shaft section by a certain distance.

The bearing spacer 77 comprises a first connecting section and a second connecting section which are coaxially and sequentially arranged, the outer diameters of the first connecting section and the second connecting section are equal, and the inner diameter of the first connecting section is smaller than that of the second connecting section; the first connecting section is sleeved on the periphery of the first shaft section, the periphery of the second connecting section is sleeved on the periphery of the tool withdrawal groove, and the outer wall of the clamping ring 76 is in contact fit with the inner wall of the second connecting section.

The bearing spacer 77 is mounted on the mounting shaft 71 to position the distance between the two bearings so that the load centers of the two self-aligning thrust roller bearings 75 intersect at the same point to form a spherical hinge.

The upper gland 79 comprises a circular upper blocking cover, the circumferential edge of the upper blocking cover is bent downwards along the axial direction of the upper blocking cover to form an upper bent edge, and the circumferential edge of the lower end of the upper bent edge protrudes outwards along the radial direction of the upper bent edge to form an upper pressure plate; the self-aligning thrust roller bearing 75 sleeved on the first shaft section abuts against the upper baffle cover.

The lower gland 72 comprises a circular lower baffle cover, the circumferential edge of the lower baffle cover is bent upwards along the circumferential direction to form a lower bent edge, and the circumferential edge of the upper end of the lower bent edge protrudes outwards along the radial direction to form a lower pressure plate; the self-aligning thrust roller bearing 75 sleeved on the second shaft section is abutted against the lower baffle cover; the third shaft segment extends through the lower shield cap and out of the mounting block 74.

The outer diameter of the middle part of the bearing outer sleeve 78 is larger than the outer diameters of the two ends of the bearing outer sleeve 78, the upper end of the bearing outer sleeve 78 correspondingly props against the upper baffle cover, and the outer wall of the end is in contact fit with the inner wall of the upper bent edge; the middle part of the bearing outer sleeve 78 correspondingly extends into the space between the upper gland 79 and the lower gland 72 and is contacted and attached with the inner wall of the mounting seat 74; the lower end of the bearing outer sleeve 78 correspondingly abuts against the lower baffle cover, and the outer wall of the end is in contact fit with the inner wall of the lower bent folded edge.

The clamping ring 76 is formed by splicing two semicircular rings and is clamped in the tool withdrawal groove to form a shaft shoulder, the position of a bearing at one end is positioned, and the load action centers of the two self-aligning thrust roller bearings 75 are intersected on the same point to form a spherical hinge.

The mounting seat 74 is a mounting base of the top hinged seat 7, the upper gland 79 and the lower gland 72 are fixed on the base surface of the mounting seat 74 by the connecting bolts 73, and mounting holes of the top hinged seat 7 are distributed on the lower gland 72 and the upper gland 79.

The connecting bolt 73 comprises a first connecting bolt 73 and a second connecting bolt 73, the first connecting bolt 73 penetrates through the upper press plate, the mounting seat 74 and the lower press plate to fixedly connect the upper press plate, the mounting seat 74 and the lower press plate, and the second connecting bolt 73 penetrates through the middle of the upper press plate, the bearing outer sleeve 78 and the lower press plate to fixedly connect the upper press plate, the bearing outer sleeve 78 and the lower press plate.

The upper surface of the mounting seat 74 is recessed downwards to form an upper sunken groove, and the upper gland 79 correspondingly covers the upper sunken groove; the lower surface of the mounting seat 74 is recessed upwards to form a sunken groove, and the lower gland 72 correspondingly covers the sunken groove.

The two self-aligning thrust roller bearings 75 are installed in the installation seat 74 face to face, the structural form of the self-aligning thrust roller bearings 75 used in pairs is adopted, the distance between the two bearings is positioned through a shaft shoulder formed by the clamping ring 76 and the bearing spacer 77, the load action centers of the two self-aligning thrust roller bearings 75 are intersected on the same point, and a spherical hinge type connection mode is formed.

Through adopting the utility model discloses an above-mentioned technical scheme has obtained following profitable effect:

the utility model provides a revolving stage around virtual axle is rotatory, revolving stage do not have the axis, have increased upper portion auxiliary stay point, constitute virtual axle, have reduced bottom installation area, and the structure atress is simple, seeks the reduction to spare part, and the material reduces, and processing, installation are simple, and the motion is reliable, uses in a flexible way, and the debugging is convenient, and the system is more controllable.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be viewed as the protection scope of the present invention.

Claims (10)

1. A rotary table for rotation about a virtual axis, comprising: the device comprises a base, a driving mechanism, a rotary support, an object stage, a bottom connecting seat, a rotating object, a top hinged seat and a top support; the base is fixedly connected with the civil embedded part, and the top support is fixedly arranged above the base; the driving mechanism and the rotary support are installed on the base, the output end of the driving mechanism is connected with the rotary support, the rotary support is connected with the objective table, and the upper end and the lower end of the rotary object are respectively connected with the objective table and the top support through the top hinged seat and the bottom connecting seat.

2. A rotary table rotating about a virtual axis according to claim 1, wherein: the driving mechanism comprises a gear motor and a pinion, the pinion is installed on an output shaft of the gear motor, and the pinion is meshed with the rotary support.

3. A rotary table rotating about a virtual axis according to claim 2, wherein: the rotary support comprises a stator ring and a rotor ring which are coaxially arranged from inside to outside, the stator ring is installed on the base, the rotor ring is meshed with the pinion, and the rotor ring is connected with the objective table.

4. A rotary table rotating about a virtual axis according to claim 3, wherein: the object carrying platform comprises an object carrying connecting seat and an object carrying plate, wherein a lower flange of the object carrying connecting seat is connected with the rotor ring, an upper flange of the object carrying connecting seat is connected with the object carrying plate, and the object carrying plate is connected with the lower end of the rotating object through the bottom connecting seat.

5. A turntable for rotation about a virtual axis, according to claim 4, wherein: the bottom connecting seat comprises a universal joint and an adjustable supporting rod, the upper end and the lower end of the universal joint are respectively connected with the lower ends of the loading plate and the adjustable supporting rod, and the upper end of the adjustable supporting rod is connected with the lower end of the rotating object.

6. A rotary stage rotating about a virtual axis as claimed in claim 5, characterized in that: the adjustable support rod comprises a fixed shaft rod, a movable shaft rod, an adjusting nut sleeve, an upper locking nut and a lower locking nut; the moving shaft lever is hollow and two ends of the moving shaft lever are open; the lower end of the fixed shaft lever is connected with the upper end of the universal joint, and the upper end of the fixed shaft lever extends into the movable shaft lever through the lower end of the movable shaft lever and is connected with the movable shaft lever in a buckling way; the upper part and the lower part of the inner wall of the adjusting nut sleeve are respectively provided with internal threads with opposite turning directions, the outer wall of the moving shaft rod and the outer wall of the moving shaft rod are respectively provided with external threads with opposite turning directions, and the upper part and the lower part of the inner wall of the adjusting nut sleeve are respectively correspondingly meshed with the outer wall of the moving shaft rod and the outer wall of the fixed shaft rod, so that the adjusting nut sleeve is sleeved on the peripheries of the moving shaft rod and the fixed shaft rod; an upper locking nut and a lower locking nut are respectively meshed with the movable shaft lever and the fixed shaft lever and respectively abutted against the upper end and the lower end of the adjusting nut sleeve; the upper end of the moving shaft rod is connected with the lower end of the rotating object.

7. A rotary stage rotating about a virtual axis as claimed in claim 6, characterized in that: the fixed shaft rod is a stepped shaft consisting of an upper shaft section, a lower shaft section and a shaft seat which are coaxially and sequentially arranged from top to bottom, the diameter of the upper shaft section is smaller than that of the lower shaft section, an external tooth spline is arranged on the outer wall of the upper shaft section, and an external thread is arranged on the outer wall of the lower shaft section; the upper shaft section extends into the moving shaft rod through the lower end of the moving shaft rod and is connected with the moving shaft rod in a buckling mode through the external tooth spline; the external thread on the lower shaft section is meshed with the internal thread on the lower part of the inner wall of the adjusting nut sleeve, and the lower locking nut is meshed on the lower shaft section.

8. A turntable for rotation about a virtual axis as claimed in any one of claims 1 to 7, wherein: the top hinged seat comprises an installation shaft, a thrust self-aligning roller bearing, a clamping ring, a bearing spacer bush, a bearing outer sleeve, a lower gland, an upper gland, an installation seat and a connecting bolt; the mounting seat is connected with the top support, the mounting seat is hollow inside and two ends of the mounting seat are open, the upper gland and the lower gland respectively cover the upper end and the lower end of the mounting seat correspondingly, one end of the mounting shaft extends into the mounting seat, and the other end of the mounting shaft penetrates through the lower gland and extends out of the mounting seat to be connected with the upper end of the rotating object; two opposite thrust self-aligning roller bearings are arranged on the mounting shaft in a spacing sleeve mode and respectively abut against the upper gland and the lower gland; a bearing spacer bush is sleeved on the mounting shaft between the two thrust self-aligning roller bearings, and two ends of the bearing spacer bush respectively abut against the two thrust self-aligning roller bearings; the thrust self-aligning roller bearing and the bearing spacer sleeve are sleeved with bearing outer sleeves, and the upper end and the lower end of each bearing outer sleeve respectively abut against the upper gland and the lower gland; the upper gland, the bearing outer sleeve, the lower gland and the mounting seat are fixedly connected together through the connecting bolt.

9. A rotary stage rotating about a virtual axis as claimed in claim 8, wherein: the mounting shaft is a stepped shaft composed of a first shaft section, a tool withdrawal groove, a second shaft section and a third shaft section which are coaxially and sequentially arranged; the diameters of the first shaft section and the second shaft section are the same and are larger than the diameter of the tool withdrawal groove, and the diameter of the third shaft section is larger than the diameters of the first shaft section and the second shaft section; the first shaft section and the second shaft section are respectively sleeved with a thrust self-aligning roller bearing, the tool withdrawal groove is sleeved with a clamping ring, and the clamping ring extends into the bearing spacer sleeve and is fixedly connected with the bearing spacer sleeve; the third shaft section penetrates through the lower gland to extend out of the mounting seat and is connected with the upper end of the rotating object, and the second shaft section is sleeved with the self-aligning thrust roller bearing and is separated from the third shaft section by a certain distance.

10. A rotary stage for rotation about a virtual axis as claimed in claim 9, further comprising: the bearing spacer comprises a first connecting section and a second connecting section which are coaxially and sequentially arranged, the outer diameters of the first connecting section and the second connecting section are equal, and the inner diameter of the first connecting section is smaller than that of the second connecting section; the first connecting section is sleeved on the periphery of the first shaft section, the periphery of the second connecting section is sleeved on the periphery of the tool withdrawal groove, and the outer wall of the clamping ring is in contact fit with the inner wall of the second connecting section.

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