CN117001367A

CN117001367A - High-precision turntable capable of automatically adjusting gap and adjusting method

Info

Publication number: CN117001367A
Application number: CN202311025596.6A
Authority: CN
Inventors: 孙文彬; 吴云腾
Original assignee: Quanzhou Yongjiahao Machinery Technology Co ltd
Current assignee: Quanzhou Yongjiahao Machinery Technology Co ltd
Priority date: 2023-08-15
Filing date: 2023-08-15
Publication date: 2023-11-07

Abstract

The application discloses a high-precision turntable capable of automatically adjusting a gap and an adjusting method, wherein the turntable comprises a base, a turntable, a first motor, a double-lead worm gear mechanism, an oil pressure compensation mechanism and a gap compensation feedback mechanism, the turntable is arranged on the base and is connected in a rotating way, the first motor is arranged on the base, a worm wheel of the double-lead worm gear mechanism is arranged at the lower end of the turntable, a worm of the double-lead worm gear mechanism is connected on the base in a rotating way, the first motor is connected with the worm in a transmission way through a belt pulley mechanism, the oil pressure compensation mechanism and the gap compensation feedback mechanism are respectively arranged at two ends of the worm, the oil pressure compensation mechanism comprises an oil pressure cylinder, and the gap compensation feedback mechanism comprises a disc spring. The application realizes automatic compensation of the clearance through the high-precision oil pressure control system, does not need manual adjustment precision and waiting, and has an automatic adjustment function.

Description

High-precision turntable capable of automatically adjusting gap and adjusting method

Technical Field

The application relates to the technical field of turntables, in particular to a high-precision turntable capable of automatically adjusting a gap and an adjusting method.

Background

Along with the continuous progress of the technology in the field of numerical control machine tools, the numerical control rotary table is developing towards the directions of higher precision and better precision retention. The traditional turntable has the transmission modes of direct drive, worm and gear and cam roller matching drive, and gear and synchronous belt. In the turntable driving method, the accuracy of direct driving is highest, but torsion and rigidity are low due to lack of a speed reduction device. The driving mode of the worm gear and the cam roller in cooperation can realize large torque transmission due to larger transmission ratio, and the precision can reach to be close to direct driving after assembly and trimming, but the precision is required to be readjusted after the worm gear and the cam roller are worn for a period of time due to hard contact. In actual production, a user often cannot finish the precision adjustment, and a manufacturer is required to match the precision adjustment. Thus considerably affecting the use effect; the transmission mode of the gears and the synchronous belts has lower precision and serious size limitation problem.

In order to solve the technical problems, the manufacturers of the rotary tables at present use double-lead worm gears to drive the rotary tables to rotate. The double-lead worm gear is mainly driven by sliding friction, abrasion phenomenon is easy to occur after long-term work, and the meshing gap of the worm gear is increased, so that the transmission stability and the transmission precision of the turntable are easy to influence. At the moment, the equipment can be shut down for maintenance, the operation is very complicated by manually adjusting the meshing gap between the worm wheel and the worm, and a large amount of maintenance time is required, so that the processing and using efficiency of the turntable is affected.

In view of the above, the present inventors have made intensive studies to solve the above problems, and have made the present application.

Disclosure of Invention

The application mainly aims to provide a high-precision turntable capable of automatically adjusting a gap and an adjusting method, which realize automatic gap compensation through a high-precision oil pressure control system without manual adjustment precision and waiting and have an automatic adjusting function.

In order to achieve the above object, the solution of the present application is:

the utility model provides an automatic high accuracy revolving stage in adjustment clearance, includes base, carousel, first motor, two helical pitch worm gear mechanisms, oil pressure compensation mechanism and clearance compensation feedback mechanism, the carousel is established and is rotated on the base and is connected, first motor is installed on the base, the lower extreme at the carousel is installed to the worm wheel of two helical pitch worm gear mechanisms, the worm rotation of two helical pitch worm gear mechanisms is connected on the base, first motor passes through belt pulley mechanism and worm drive connection, first motor has load recording system, and load recording system detects and records the frictional force between turbine and the worm, oil pressure compensation mechanism with the both ends at the worm are installed respectively to clearance compensation feedback mechanism, oil pressure compensation mechanism includes the oil pressure jar, the pressure F1 along axial to inboard direction is applyed to the worm to the oil pressure jar, clearance compensation feedback mechanism includes the dish spring, the dish spring applys the pressure F2 along axial to the worm to the inboard direction.

Further, the oil pressure compensation mechanism further comprises a first bearing seat and a gland, a first mounting hole is formed in the base, the first bearing seat is fixedly connected in the first mounting hole, two first bearings are arranged in the first bearing seat, a spacer ring is arranged between the first bearings, the gland is fixedly connected to the end face of the first bearing seat, the gland compresses and fixes the first bearings, and the end portion of the worm extends into the first bearing seat and is connected with the first bearings in a matched mode.

Further, the oil pressure cylinder comprises an oil cylinder body, an oil cylinder cover and a piston, wherein the oil cylinder body is arranged on the outer side wall of the first mounting hole, an oil cavity is formed in the oil cylinder body, the piston is arranged in the oil cavity and is connected in a sliding mode, the oil cylinder cover is arranged on the side wall of the oil cylinder body to seal the oil cavity, a cushion block which is fixedly connected is arranged on the worm, and the end face of the piston and the end face of the cushion block are propped against each other.

Further, the clearance compensation feedback mechanism comprises a second bearing seat, a locking block, a second bearing, a third bearing and a bearing gasket, wherein a second mounting hole and a third mounting hole which are communicated with each other are formed in the base, the second bearing seat is sleeved in the second mounting hole and is in sliding connection, the second bearing and the third bearing are arranged in the second bearing seat, the end face, close to the outer side, of the third bearing is provided with the bearing gasket, the worm is provided with a locking nut and a supporting boss, the supporting boss abuts against the bearing gasket close to the outer side, the locking nut abuts against the bearing gasket close to the inner side, so that the worm is fixedly connected with the second bearing seat, the locking block is arranged in the third mounting hole, and the disc spring is arranged between the second bearing seat and the locking block.

Further, the outside limit of second bearing is equipped with the outwards bellied location convex part, the latch segment is equipped with the guide chute, the tip of second bearing frame stretches into the sliding connection of guide chute, the dish spring cover is established on the second bearing frame, and the one end and the location convex part of dish spring are supported and are supported with the side terminal surface of the other end latch segment and are supported.

Further, a limiting groove is formed in the second mounting hole, and the positioning convex part stretches into the limiting groove to be connected in a sliding mode.

Further, the gap compensation feedback mechanism further comprises a detection block, a mounting seat and a distance detector, the detection block is mounted on the second bearing seat, the detection block is provided with a detection convex part, the locking block is provided with a through hole for the detection convex part to extend out, the mounting seat is arranged on the side end face of the third mounting hole, and the distance detector is connected to the mounting seat and senses and detects the detection convex part in the through hole.

The adjusting method of the high-precision turntable based on the automatic gap adjustment comprises the following steps:

(1) When the worm wheel and the worm are positioned at the optimal position to work, the worm is contacted with the worm wheel to generate a friction force F1, the friction force F1 is detected and recorded through a first motor load recording system, the left end of the worm is subjected to a pressure F1 generated by an oil hydraulic cylinder, the right end of the worm is subjected to a pressure F2 generated by a disc spring, at the moment, the two ends of the worm are in a stress balance state, namely F1=f1+F2, and the first motor load recording system displays a load value of 30%;

(2) When the worm wheel and the worm wear, the friction force generated by the contact of the worm and the worm wheel is 0, the stress balance state of the worm is broken, the worm moves rightwards by the distance of S1, and the worm drives the second bearing seat to move rightwards; the disc spring is continuously compressed in the moving process of the worm, F2 is continuously increased until the stress on the left side and the right side of the worm reaches balance again, the worm stops moving, a new balance state F1=f2+F2' is generated by the worm, the detection block is sensed by the distance detector, the displacement distance S1 is recorded, and a signal is transmitted to the control system;

(3) If F2 is larger than F1, namely the turbine and the worm are tightly contacted by the pressure of F1, at the moment, the load recording system detects an alarm value with a recorded load value being more than 35%, the load recording system feeds back a signal to the oil hydraulic cylinder, the oil hydraulic cylinder starts to decompress so that F1 gradually decreases, the worm gradually moves leftwards, F2 gradually decreases, when the load recording system detects that the recorded load value is equal to 30%, the load recording system feeds back the signal to the oil hydraulic cylinder, the oil hydraulic cylinder stops decompressing, at the moment, the turbine and the worm are restored to the optimal position, the distance detector carries out induction detection on the detection block, the left displacement distance S2 of the worm is recorded, the signal is transmitted to the control system, and the control system calculates the actual moving distance of the worm as S1-S2; if F2 is smaller than F1, namely the worm wheel and the worm are not fully contacted, at the moment, the load recording system detects an alarm value with a recorded load value smaller than 25%, the load recording system feeds back a signal to the oil hydraulic cylinder, the oil hydraulic cylinder starts to be pressurized, so that F1 gradually increases, the left side pressure of the worm gradually moves rightwards, F2 gradually increases, when the load recording system detects that the recorded load value is equal to 30%, the load recording system feeds back the signal to the oil hydraulic cylinder, the oil hydraulic cylinder stops pressurizing, at the moment, the worm wheel and the worm wheel are restored to the optimal position, the distance detector carries out inductive detection on the detection block, the worm continues to shift rightwards by a distance S2 and transmits the signal to the control system, and the control system calculates the actual moving distance of the worm to be S1+S2;

(4) After the control system calculates the actual moving distance of the worm, the worm wheel and the worm adjusts the clearance of 0.01mm every time when the worm moves by 1mm according to the design principle of the worm wheel and the worm, the clearance is converted into angle compensation, and automatic compensation is carried out on the turntable.

Compared with the prior art, the application has the beneficial effects that the clearance compensation feedback is realized through the high-precision disc spring and the distance detector, and the clearance automatic compensation is realized through the high-precision oil pressure control system, so that the effects of automatic precision adjustment and automatic clearance compensation are achieved, manual stop adjustment and waiting are not needed in the adjustment process, the time wasted by manual clearance adjustment is greatly saved, the use and working efficiency of the turntable are further improved, and a large amount of maintenance cost is saved. Compared with the traditional turntable, the turntable has a simpler and simpler overall structure, and can effectively reduce the manufacturing cost.

Drawings

Fig. 1 is a perspective view of the outline structure of the present application.

Fig. 2 is a schematic cross-sectional structure of the present application.

Fig. 3 is a partial enlarged view of the area a in fig. 2.

Fig. 4 is a partial enlarged view of the region B in fig. 2.

FIG. 5 is a flow chart of the adjustment method of the present application.

Fig. 6 is a schematic diagram of the external structure of another embodiment of the present application.

Fig. 7 is a schematic structural view of the jig module.

Fig. 8 is a cross-sectional view of the structure in which the clamping jaw is connected to the adjusting plate.

Fig. 9 is a cross-sectional structure bottom view of the mounting plate.

In the figure:

base 1, first mounting hole 11, second mounting hole 12, limit groove 121,

The third mounting hole 13, the first bearing 111, the turntable 2, the first motor 31, the worm wheel 32, the worm 33, the cushion block 331, the lock nut 332, the abutment boss 333, the hydraulic cylinder 34, the cylinder body 341, the cylinder head 342, the piston 343, the first bearing seat 35, the gland 36, the disc spring 41, the second bearing seat 42, the positioning boss 421, the lock block 43, the guide chute 431, the second bearing 44, the third bearing 45, the bearing washer 46, the detection block 47, the second bearing,

Mount 48, distance detector 49, fixed plate 51, mount plate 52, movable groove 521, guide groove 522, drive groove 523, through hole 524, holding jaw 53, adjusting plate 54,

A connection groove 541, an adapter 55, a first connector 551, a second connector 552,

A switching shaft 553, a connecting rod 56, a connector 561, a cylindrical pin 562, a driving plate 57, a containing groove 571, a second bar-shaped hole 572, a driving shaft 58, a second motor 59,

A first rotating shaft 61, a second rotating shaft 62.

Detailed Description

In order to further explain the technical scheme of the application, the application is explained in detail by specific examples.

As shown in fig. 1-9, a high-precision turntable capable of automatically adjusting a gap comprises a base 1, a turntable 2, a first motor 31, a double-lead worm gear mechanism, an oil pressure compensation mechanism and a gap compensation feedback mechanism, wherein the turntable 2 is arranged on the base 1 and is rotationally connected, the first motor 31 is arranged on the base 1, a worm wheel 32 of the double-lead worm gear mechanism is arranged at the lower end of the turntable 2, a worm 33 of the double-lead worm gear mechanism is rotationally connected on the base 1, the first motor 31 is in transmission connection with the worm 33 through a belt pulley mechanism, the first motor 31 is provided with a load recording system, the load recording system detects and records friction force between the worm wheel and the worm, the oil pressure compensation mechanism and the gap compensation feedback mechanism are respectively arranged at two ends of the worm 33, the oil pressure compensation mechanism comprises an oil pressure cylinder 34, the oil pressure cylinder 34 applies pressure F1 along the axial inward direction to the worm 33, the gap compensation feedback mechanism comprises a disc spring 41, and the disc spring 41 applies pressure F2 along the axial inward direction to the worm 33.

In this embodiment, the oil pressure compensation mechanism further includes a first bearing seat 35 and a gland 36, a first mounting hole 11 is provided on the base 1, the first bearing seat 35 is fixedly connected in the first mounting hole 11, two first bearings 111 are provided in the first bearing seat 35, a spacer ring 112 is provided between the first bearings 111, the gland 36 is fixedly connected on the end face of the first bearing seat 35, the gland 36 compresses and fixes the first bearings 111, so that the first bearings 111 are more firmly installed, the first bearings 111 can be needle bearings, and the end part of the worm 33 extends into the first bearing seat 35 and is connected with the first bearings 111 in a matched manner, so that the worm 33 is more firmly connected and rotates more stably.

Preferably, the oil cylinder 34 includes a cylinder body 341, a cylinder head 342 and a piston 343, the cylinder body 341 is mounted on the outer side wall of the first mounting hole 11, an oil cavity is provided in the cylinder body 341, the piston 343 is provided in the oil cavity and is slidably connected, the cylinder head 342 is provided on the side wall of the cylinder body 341 to seal the oil cavity, a fixed connection pad 331 is provided on the worm 33, the end face of the piston 343 and the end face of the pad 331 are propped against each other, after the structure is adopted, the stroke of the piston 343 is controlled by inputting and outputting hydraulic oil into the oil cavity, and the piston 343 is propped against the pad 331 when moving rightward, thereby driving the worm 33 to move rightward to realize the axial adjustment of the worm 33.

Preferably, the gap compensation feedback mechanism comprises a second bearing seat 42, a locking block 43, a second bearing 44, a third bearing 45 and a bearing gasket 46, wherein a second mounting hole 12 and a third mounting hole 13 which are mutually communicated are arranged on the base 1, the second bearing seat 42 is sleeved in the second mounting hole 12 and is in sliding connection, the second bearing 44 and the third bearing 45 are arranged in the second bearing seat 42, the third bearing 45 is arranged at the left side and the right side of the second bearing 44, a needle bearing can be used as a specific second bearing 44, a thrust ball bearing can be used as a third bearing 45, a bearing gasket 46 is arranged at the end face of the third bearing 45 close to the outer side, a locking nut 332 and a propping boss 333 are arranged on the worm 33, the propping boss 333 is propped against the bearing gasket 46 close to the outer side, the locking nut 332 is propped against the bearing gasket 46 close to the inner side, so that the worm 33 is fixedly connected with the second bearing seat 42, the locking block 43 is arranged in the third mounting hole 13, and a disc spring 41 is arranged between the second bearing seat 42 and the locking block 43.

More preferably, the outer side of the second bearing block 42 is provided with an outwardly protruding positioning protrusion 421, the locking block 43 is provided with a guiding chute 431, the end of the second bearing block 42 extends into the guiding chute 431 to be slidably connected, the disc spring 41 is sleeved on the second bearing block 42, one end of the disc spring 41 abuts against the positioning protrusion 421 and the side end face of the other end locking block 43 abuts against the positioning protrusion 421, and therefore pressure towards the inner side is applied to the worm 33, so that the worm 33 is in a state of being in stress balance.

Preferably, the second mounting hole 12 is provided with a limiting groove 121, the positioning convex part 421 extends into the limiting groove 121 to be slidably connected, the side wall of the limiting groove 121 can be propped against the side wall of the positioning convex part 421, thereby limiting the second bearing 44 sleeve,

preferably, the gap compensation feedback mechanism further comprises a detecting block 47, a mounting seat 48 and a distance detector 49, the detecting block 47 is mounted on the second bearing 42, the detecting block 47 is provided with a detecting convex part 471, the locking block 43 is provided with a through hole for the detecting convex part 471 to extend out, the mounting seat 48 is arranged on the side end face of the third mounting hole 13, the distance detector 49 is connected to the mounting seat 48 and senses the right side face of the detecting convex part 471 in the through hole, whether the worm 33 transversely displaces or not can be sensed in real time through the distance detector 49, a displacement signal can be fed back to a control system through the distance detector 49, the distance S2 required to be continuously moved by the worm 33 and the oil pressure required to be increased by the oil pressure cylinder 34 are calculated through the control system, and the oil pressure signal is fed back to the oil pressure cylinder 34, so that the pressure of the oil pressure cylinder 34 is increased.

When the turntable works, the friction force between the turbine 32 and the worm 33 is recorded and monitored through the load recording system of the first motor 31, and when the turbine 32 and the worm 33 are at the optimal positions, the load value displayed by the load recording system of the first motor 31 is 30%, and the alarm value is set to 25% and 35% by the load recording system. When the worm wheel 32 and the worm 33 wear, the worm 33 moves rightward, and there are two cases:

in the first case, when the compressed distance of the right disc spring is relatively large, the worm 33 is moved rightward by the pressure F1 of the left hydraulic cylinder 34, the worm 33 is in close contact with the engagement portion of the turbine 32, so that the friction between the worm 33 and the turbine 32 is greatly increased, the value displayed by the load recording system exceeds 35%, and the distance detector records the distance S1 of the rightward movement of the detection block. Then, the first motor 31 gives an alarm and feeds a signal back to the oil cylinder 34, the oil cylinder 34 gradually and slowly decompresses, so that the F1 is slowly reduced, when the elastic force F2 of the right-side compressed disc spring is larger than the F1, the worm 33 slowly moves leftwards, during the leftward movement of the worm 33, the friction force at the meshing part between the worm wheel 32 and the worm 33 gradually decreases, the load of the first motor 31 also gradually decreases, and when the load recording system detects that the load value between the worm wheel 32 and the worm 33 is restored to 30%, a feedback signal is given to the oil cylinder 34, at this time, the oil cylinder 34 stops decompressing, and the worm wheel 32 and the worm 33 are restored to the optimal positions. The distance detector records the distance S2 of the left movement of the detection block, the actual movement distance of the worm 33 is S1-S2, and then the worm wheel 32 and the worm 33 adjust a gap of 0.01mm every 1mm movement according to the design principle of the worm wheel 32 and the worm 33, the actual movement distance is converted into angle compensation, and automatic compensation is carried out on the turntable.

In the second case, when the compressed distance of the right disc spring is smaller, the worm 33 is moved rightward by the pressure F1 of the left hydraulic cylinder 34, the engagement portion between the worm 33 and the worm wheel 32 is not sufficiently contacted, so that the friction between the worm 33 and the worm wheel 32 is reduced, and the value displayed by the load recording system is smaller than 25%, and the distance detector records the distance S1 of the rightward movement of the detection block. Then the first motor 31 gives an alarm and feeds back a signal to the hydraulic cylinder 34, the hydraulic cylinder 34 is gradually and slowly pressurized, so that F1 is slowly increased, the worm 33 slowly and continuously moves rightwards, the friction force on the meshing part between the worm wheel 32 and the worm 33 is gradually increased in the rightward movement process of the worm 33, the load of the first motor 31 is also gradually increased, when the load recording system detects that the load value between the worm wheel 32 and the worm 33 is restored to 30%, a feedback signal is sent to the hydraulic cylinder 34, at the moment, the hydraulic cylinder 34 stops pressurizing, and the worm wheel 32 and the worm 33 are restored to the optimal positions. The distance detector records the distance S2 that the detection block continuously moves rightwards, the actual moving distance of the worm 33 is S1+S2, and then the worm wheel 32 and the worm 33 adjust a gap of 0.01mm every time 1mm is moved according to the design principle of the worm wheel 32 and the worm 33, the actual moving distance is converted into angle compensation, and automatic compensation is carried out on the turntable.

Compared with the prior art, the application has the beneficial effects that the clearance compensation feedback is realized through the high-precision disc spring 41 and the distance detector 49, and the automatic clearance compensation is realized through the high-precision oil pressure control system, so that the effects of automatic regulation precision and automatic clearance compensation are achieved, manual stop regulation and waiting are not needed in the regulation process, the time wasted by manual regulation of the clearance is greatly saved, the use and working efficiency of the turntable are further improved, and a large amount of maintenance cost is saved. Compared with the traditional turntable, the turntable has a simpler and simpler overall structure, and can effectively reduce the manufacturing cost.

More preferably, as another embodiment of the present application, in order to facilitate the clamping and fixing of the workpiece by the turntable, the turntable 2 is further provided with a fixture module, the fixture module includes a fixed disc 51, a mounting disc 52, a clamping jaw 53 and a driving mechanism, the fixed disc 51 is detachably mounted on the turntable 2 by a screw, the mounting disc 52 is connected to the fixed disc 51, and the mounting disc 52 and the fixed disc 51 are locked by the screw. The mounting plate 52 is provided with a movable groove 521, a guide groove 522 communicated with the movable groove 521 is arranged in the mounting plate 52, the upper end of the clamping jaw 53 is rotatably connected with the mounting plate 52 through a first rotating shaft 61, the lower end of the clamping jaw 53 stretches into the movable groove 521, and a driving mechanism is arranged in the guide groove 522 and drives the clamping jaw 53 to swing around the first rotating shaft 61.

In this embodiment, the driving mechanism includes an adjusting plate 54, an adapter 55, a connecting rod 56 and a driving assembly, the adjusting plate 54 is disposed in the guiding slot 522, and a gap is formed between the upper surface of the adjusting plate 54 and the upper slot wall of the guiding slot 522, so that the adjusting plate 54 has a certain swinging space. The both ends of regulating plate 54 are equipped with spread groove 541 respectively, and the one end and the spread groove 541 swing joint of adaptor 55 and the other end are articulated with the lower extreme of clamping jaw 53, and connecting rod 56 level sets up, and connecting rod 56 axis extending direction is mutually perpendicular with the left and right directions of regulating plate 54, and the rear end of connecting rod 56 passes along the central line of regulating plate 54 for regulating plate 54 rotates with connecting rod 56 to be connected, and regulating plate 54 can swing around the axis of connecting rod 56. The connecting rod 56 is provided with locking blocks, the locking blocks can be locked on the connecting rod 56 through threads, the locking blocks are arranged on the front side surface and the rear side surface of the adjusting plate 54 and are used for fixing the position of the adjusting plate 54 on the connecting rod 56, the front end of the connecting rod 56 is connected with a driving assembly, and the driving assembly drives the connecting rod 56 to move forwards and backwards along the axial direction. In order to guide the movement of the connection rod 56 and the adjustment plate 54, a guide hole is provided in the mounting plate 52 to be engaged with the connection rod 56. Specifically, the adaptor 55 includes a first connector 551, a second connector 552 and a adaptor shaft 553, where the front end of the first connector 551 is provided with a first bar hole, a second rotating shaft 62 is disposed in the connecting slot 541, the second rotating shaft 62 passes through the first bar hole and is movably connected in the first bar hole, the rear end of the first connector 551 is sleeved with the front end of the adaptor shaft 553 to rotate and connect, the front end of the second connector 552 is sleeved with the rear end of the adaptor shaft 553 to rotate and connect, and the rear end of the adaptor shaft 553 is hinged with the lower end of the clamping jaw 53. So that the adjusting plate 54 can flexibly drive the clamping jaw 53 to swing in the process of moving back and forth or swinging. After the structure is adopted, the driving assembly drives the connecting rod 56 to move along the axial direction, so that the adjusting plate 54 is driven to move back and forth, and the adjusting plate 54 drives the clamping jaw 53 to swing through the adapter 55 in the process of moving back and forth, so that the clamping jaw 53 can clamp or unclamp a workpiece.

In this embodiment, the driving assembly includes a driving plate 57, a driving shaft 58 and a second motor 39, the bottom of the mounting plate 52 is further provided with a driving slot 523 and a through hole 524 for the driving shaft 58 to pass through, the driving plate 57 is symmetrically arranged in the driving slot 523 to slide, the driving shaft 58 passes through the driving plate 57 on two sides, the driving shaft 58 is in threaded connection with the driving plate 57, the screw directions of the matched threaded sections on the driving plates 57 on two sides are opposite, the second motor 39 is mounted on the mounting plate 52, the power output end of the second motor 39 is connected with the driving shaft 58, two sides of the driving plate 57 are provided with accommodating slots 571, the upper surface and the lower surface of the accommodating slots 571 are provided with second bar-shaped holes 572, the front end of the connecting rod 56 is provided with a connecting head 561, the connecting head 561 is embedded in the accommodating slots 571 to be in sliding connection, the upper surface and the lower surface of the connecting head 561 are provided with cylindrical pins 572, and the cylindrical pins 562 are in sliding fit with the second bar-shaped holes. Specifically, in this embodiment, four adjusting plates 54 are provided, the adjusting plates 54 are uniformly distributed around the central axis of the mounting plate 52, and an included angle between the axis of the driving shaft 58 and the axis of the connecting rod 56 is 45 degrees. With the above structure, the second motor 39 drives the driving shaft 58 to rotate, so as to control the driving plates 57 to approach or separate from each other, when the driving plates 57 approach each other, the adjusting plates 54 are driven to move toward the inner side of the mounting plate 52, when the driving plates 57 separate from each other, the adjusting plates 54 are driven to move toward the outer side of the mounting plate 52, and by the above structure, the adjusting plates 54 can be driven to synchronously move, so that the clamping or loosening of the workpiece by the clamping jaws 53 is realized.

The above examples and drawings are not intended to limit the form or form of the present application, and any suitable variations or modifications thereof by those skilled in the art should be construed as not departing from the scope of the present application.

Claims

1. The utility model provides an automatic high accuracy revolving stage in adjustment clearance, its characterized in that, includes base, carousel, first motor, dual lead worm gear mechanism, oil pressure compensation mechanism and clearance compensation feedback mechanism, the carousel is established and is rotated on the base and connect, first motor is installed on the base, the lower extreme at the carousel is installed to the worm wheel of dual lead worm gear mechanism, the worm rotation of dual lead worm gear mechanism is connected on the base, first motor passes through belt pulley mechanism and worm drive connection, first motor has load recording system, and load recording system detects and records the frictional force between turbine and the worm, oil pressure compensation mechanism with clearance compensation feedback mechanism installs respectively at the both ends of worm, oil pressure compensation mechanism includes the oil pressure jar, the oil pressure jar is exerted along the pressure F1 of axial inboard direction to the worm, clearance compensation feedback mechanism includes the dish spring, the dish spring is exerted along the pressure F2 of axial inboard direction to the worm.

2. The high-precision turntable capable of automatically adjusting gaps according to claim 1, wherein the oil pressure compensation mechanism further comprises a first bearing seat and a gland, the base is provided with a first mounting hole, the first bearing seat is fixedly connected in the first mounting hole, two first bearings are arranged in the first bearing seat, a spacer ring is arranged between the first bearings, the gland is fixedly connected on the end face of the first bearing seat, the gland compresses and fixes the first bearings, and the end part of the worm extends into the first bearing seat and is matched and connected with the first bearings.

3. The high-precision turntable capable of automatically adjusting gaps according to claim 2, wherein the oil hydraulic cylinder comprises an oil cylinder body, an oil cylinder cover and a piston, the oil cylinder body is arranged on the outer side wall of the first mounting hole, an oil cavity is formed in the oil cylinder body, the piston is arranged in the oil cavity and is in sliding connection, the oil cylinder cover is arranged on the side wall of the oil cylinder body and seals the oil cavity, a cushion block which is fixedly connected is arranged on the worm, and the end face of the piston and the end face of the cushion block are propped against each other.

4. A high precision turntable for automatically adjusting a gap as claimed in claim 3, wherein the gap compensation feedback mechanism comprises a second bearing seat, a locking block, a second bearing, a third bearing and a bearing washer, wherein the base is provided with a second mounting hole and a third mounting hole which are mutually communicated, the second bearing seat is sleeved in the second mounting hole and is slidably connected, the second bearing and the third bearing are installed in the second bearing seat, the outer end face of the third bearing is provided with the bearing washer, the worm is provided with a locking nut and a supporting boss, the supporting boss is supported against the outer bearing washer, the locking nut is supported against the inner bearing washer, thereby fixedly connecting the worm with the second bearing seat, the locking block is installed in the third mounting hole, and the disc spring is arranged between the second bearing seat and the locking block.

5. The automatic gap-adjusting high-precision turntable as claimed in claim 4, wherein the outer side edge of the second bearing seat is provided with a positioning convex part protruding outwards, the locking block is provided with a guide chute, the end part of the second bearing seat stretches into the guide chute to be connected in a sliding way, the disc spring is sleeved on the second bearing seat, and one end of the disc spring abuts against the positioning convex part and the side end face of the locking block at the other end abuts against the positioning convex part.

6. The automatic gap-adjusting high-precision turntable of claim 5, wherein the second mounting hole is provided with a limit groove, and the positioning convex part extends into the limit groove to be connected in a sliding way.

7. The automatic gap-adjusting high-precision turntable according to claim 4, wherein the gap compensation feedback mechanism further comprises a detection block, a mounting seat and a distance detector, the detection block is mounted on the second bearing seat, the detection block is provided with a detection protrusion, the locking block is provided with a through hole through which the detection protrusion extends, the mounting seat is arranged on the side end face of the third mounting hole, and the distance detector is connected to the mounting seat and performs inductive detection on the detection protrusion in the through hole.

8. A method of adjusting a high precision turntable based on the automatic adjustment of a gap as claimed in any one of claims 1 to 7, characterized by comprising the steps of: