CN114273972A - Two-piece tooth-type indexing table based on worm gear and worm gear composite transmission - Google Patents
Two-piece tooth-type indexing table based on worm gear and worm gear composite transmission Download PDFInfo
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- CN114273972A CN114273972A CN202111656556.2A CN202111656556A CN114273972A CN 114273972 A CN114273972 A CN 114273972A CN 202111656556 A CN202111656556 A CN 202111656556A CN 114273972 A CN114273972 A CN 114273972A
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Abstract
The invention relates to the technical field of workbenches, in particular to a two-piece tooth type indexing workbench based on worm gear and worm gear compound transmission, which comprises: the hydraulic oil cylinder comprises a bottom shell, an oil pressure assembly, a mandrel, a disc surface, a transmission assembly and a driving assembly, wherein a mounting interface seat is arranged in a cavity in the bottom shell; the oil pressure component is fixed in a central mounting hole of the mounting interface seat; the first bearing set arranged axially and the second bearing set arranged radially enable the mandrel to be arranged in the oil pressure assembly in a rotating mode; a gear ring is fixedly arranged on one side of the disk surface close to the mounting interface seat; the transmission assembly comprises a gear shaft and a worm wheel fixedly sleeved on the gear shaft; the top of the gear shaft is provided with a gear meshed with the gear ring, and a worm on the driving component is meshed with the worm wheel. According to the invention, two-stage speed reduction is realized through the worm gear pair and the gear, so that the speed reduction ratio is increased, the torque required by workpiece cutting is fully satisfied, the constant of the meshing surface of the worm gear is kept, the meshing accuracy of two teeth is ensured by the floating type core shaft, and the positioning accuracy of the disk surface is improved.
Description
Technical Field
The invention relates to the technical field of workbenches, in particular to a two-piece tooth type indexing workbench based on worm gear and worm gear compound transmission.
Background
With the progress of society, the development of technology and the new market requirement of equipment manufacturing, the requirement on the machining precision of mechanical parts is higher and higher. The numerical control rotary worktable is used as an indispensable functional part of a numerical control boring and milling machine, a gantry machining center, a numerical control gear milling machine, a gear grinding machine and the like, and is developing towards the direction of higher precision and better precision retentivity.
The traditional two-piece tooth-type indexing table mainly adopts a worm-gear-worm pair transmission mode, a worm wheel of the traditional two-piece tooth-type indexing table is fixed on a mandrel, the mandrel is relatively rotated through a bearing group and is arranged on a fixed seat of the table, the worm is rotated and arranged on a rotary table and meshed with the worm wheel, a piston is arranged in an inner hole of the mandrel in a sliding mode along the axis direction of the mandrel, the rotation in the circumferential direction is limited through a limiting block, a disc surface is fixedly connected with the piston, hydraulic oil drives the piston to move upwards to drive a first piece of tooth on the table to be separated from a second piece of tooth on the fixed seat, at the moment, a driving motor drives the disc surface to rotate through the worm-gear-worm pair driving mandrel, after a set angle is rotated, the piston moves downwards, the first piece of tooth is meshed with the second piece of tooth, and indexing positioning of the table is realized. The reduction ratio of this structure completely depends on the diameter size of worm wheel, causes this structure transmission ratio from this to be smaller, can not provide the required drive torque of suitable work piece cutting, and because worm gear worm is vice belongs to sliding contact, when transmission power, flank of tooth friction loss is big, can lead to the meshing clearance increase in the long-time use to seriously influence the transmission precision and the stability of revolving stage.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the two-piece tooth-type indexing table based on the worm-gear pair and gear compound transmission is provided, so that the problems that the transmission ratio is small, the torque required by workpiece cutting cannot be provided, and tooth surface abrasion caused by sliding contact of the worm-gear pair causes meshing clearance increase and the transmission precision and the transmission stability of a rotary table are seriously influenced are solved.
In order to achieve the purpose, the invention adopts the technical scheme that: two tooth-like graduation workstation based on worm gear pair and gear compound drive includes: the bottom shell is provided with an inner cavity provided with a mounting interface seat, and a central mounting hole is formed in the mounting interface seat;
the oil pressure assembly is fixed in the central mounting hole;
the mandrel is coaxially arranged in the oil pressure assembly, and a first bearing set arranged in the axial direction and a second bearing set arranged in the radial direction enable the mandrel to be rotatably arranged in the oil pressure assembly;
the disc surface is fixed above the mandrel, and a gear ring is fixedly arranged on one side of the disc surface, which is close to the mounting interface seat;
the transmission assembly is rotatably arranged in the mounting hole between the bottom shell and the mounting interface seat and comprises a gear shaft and a worm wheel fixedly sleeved on the gear shaft, and the axis of the gear shaft is parallel to the axis of the mandrel;
the top of the gear shaft is provided with a gear meshed with the gear ring, a worm on the driving assembly is meshed with the worm wheel, and the mandrel is arranged in the oil pressure assembly in a floating mode under the action of the oil pressure assembly.
The locking positioning device is coaxially arranged inside the gear ring and comprises a first fluted disc fixed on the mounting interface seat and a second fluted disc fixed on the disc surface;
and arc-shaped teeth which are matched with each other are arranged on the opposite surfaces of the first fluted disc and the second fluted disc.
Furthermore, a sealing plate is arranged on the bottom surface of the bottom shell.
Further, the oil pressure assembly comprises an oil cylinder, an oil cylinder cover and a piston;
the oil cylinder is fixed on the mounting interface seat through a connecting flange at the end part;
the oil cylinder cover is fixed on the connecting flange and forms an annular oil cavity with the oil cylinder, the piston is provided with an annular boss, and the annular boss is embedded into the annular oil cavity to form an oil inlet cavity and an oil return cavity for flowing hydraulic oil.
Furthermore, the annular boss on the piston and sliding surfaces at two ends of the annular boss are sealed by Glare rings.
Furthermore, the sliding surfaces at two ends of the annular boss are also provided with wear-resisting rings.
Furthermore, one end of the piston, which is close to the disc surface, is provided with a rotation stopping groove;
and a stop block clamped in the rotation stopping groove is fixed on the oil cylinder cover.
Furthermore, the inner hole of the piston is provided with two annular grooves, and the first bearing sets are arranged in the two annular grooves.
Further, the first bearing group is made of copper oil-retaining bearings.
Furthermore, the bottom of the mandrel is in threaded connection with a supporting plate, and the top of the mandrel is provided with a connecting disc;
the supporting plate and a step hole at the bottom of the oil cylinder form a first placing groove, and the connecting disc and a step hole at the top of the piston form a second placing groove;
the second bearing group is placed in the first placing groove and the second placing groove.
Further, the second bearing group adopts a thrust cylindrical roller bearing.
Furthermore, the mandrel adopts a split structure, and the connecting disc is fixed on the central shaft of the mandrel through a fastener.
Furthermore, the transmission assembly further comprises a first rotating piece, an upper pressing sleeve, a bearing seat and a lower pressing sleeve which are sequentially sleeved on the gear shaft;
first rotation piece sets up the gear shaft is close to gear one end, it fixes through the parallel key to go up to press the cover on the step shaft of gear shaft, just the fixed cover of worm wheel is established go up to press on the cover, the bearing frame sets up and is keeping away from the one end of gear, it fixes to press the cover down on the bearing frame, it contradicts to go up to press the cover the bearing inner race inside the bearing frame, press the cover down and contradict on the bearing outer race, the bottom casing is equipped with the confession the adjustment tank of the ring flange embedding of bearing frame.
Furthermore, an adjusting structure is arranged on the flange plate, and the adjusting structure comprises a plurality of screwing screws and a plurality of ejecting screws which are arranged along the circumferential direction of the bearing seat;
the screwing screw penetrates through the flange plate and is screwed on the step surface of the adjusting groove;
the ejection screw is in threaded connection with the flange plate, and one end of the ejection screw, which extends out of the flange plate, abuts against the step surface of the adjusting groove.
Furthermore, a spacer bush is arranged between the upper pressing bush and the lower pressing bush.
Further, the driving assembly comprises a worm, bearing units and a servo motor, wherein the bearing units are rotatably arranged at two end parts of the worm, and the servo motor is used for driving the worm to rotate;
the servo motor is connected with the worm through a coupler, the two bearing units are fixed on the bottom shell, and the worm is rotatably connected on the bottom shell through the two bearing units.
Furthermore, the bottom shell is positioned at the meshing position of the worm wheel and the worm and is provided with a mounting hole for mounting the oil mirror.
Furthermore, two photoelectric signal proximity switches for detecting the lifting or falling of the disk surface are arranged on the bottom shell.
Furthermore, a zero-return proximity switch for detecting the zero position of the disk surface is further arranged on the bottom shell.
The invention has the beneficial effects that: the invention adopts the arrangement of the worm gear and the worm gear shaft to realize two-stage speed reduction, thereby increasing the speed reduction ratio, fully meeting the torque required by workpiece cutting, realizing repeated positioning under double driving, keeping the meshing surface of the worm gear and the worm constant, avoiding the tooth surface friction loss generated by the sliding contact of the worm gear and the worm, improving the transmission precision and the stability of the workbench, and the design of the floating type mandrel is convenient for adjusting the coaxiality between the piston and the mandrel, further ensuring the meshing accuracy between two teeth and improving the positioning precision of the disc surface.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic view of the positioning and clamping state of an index table according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of an embodiment of an oil hydraulic assembly according to the present invention;
FIG. 3 is an enlarged view of a portion of FIG. 1 at A;
FIG. 4 is a schematic structural diagram of a transmission assembly according to an embodiment of the present invention;
FIG. 5 is a schematic structural diagram of a driving assembly according to an embodiment of the present invention;
fig. 6 is a schematic diagram illustrating a raised state of the index table according to the embodiment of the present invention.
Reference numerals: 1. a bottom housing; 11. installing an interface seat; 2. an oil pressure assembly; 21. oil cylinder, 22, oil cylinder cover; 23. a piston; 24. an oil inlet cavity; 25. an oil return cavity; 26. a Glare circle; 27. a wear ring; 28. a rotation stopping groove; 29. a stopper; 3. a mandrel; 31. a connecting disc; 32. a support plate; 33. a central shaft; 4. a dish surface; 5. a transmission assembly; 51. a gear shaft; 52. a worm gear; 53. a first rotating member; 54. pressing a sleeve; 55. a bearing seat; 56. pressing down the sleeve; 57. an adjustment structure; 58. a spacer sleeve; 6. a drive assembly; 61. a worm; 62. a bearing unit; 63. a servo motor; 7. locking the positioning device; 8. a first bearing set; 9. a second bearing set; 10. a ring gear.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
The two-piece toothed indexing table based on worm-gear pair and gear compound transmission shown in fig. 1 to 6 comprises: the hydraulic oil cylinder comprises a bottom shell 1, an oil pressure assembly 2, a mandrel 3, a disc surface 4 and a transmission assembly 5, wherein a mounting interface seat 11 is arranged in a cavity in the bottom shell 1, and a central mounting hole is formed in the mounting interface seat 11; the oil pressure component 2 is fixed in the central mounting hole; the mandrel 3 is coaxially arranged in the oil pressure assembly 2, and the mandrel 3 is rotationally arranged in the oil pressure assembly 2 through a first bearing set 8 arranged in the axial direction and a second bearing set 9 arranged in the radial direction; the disc surface 4 is fixed above the mandrel 3, and a gear ring 10 is fixedly arranged on one side of the disc surface close to the mounting interface seat 11; the transmission assembly 5 is rotatably arranged in the mounting hole between the bottom shell 1 and the mounting interface seat 11, and comprises a gear shaft 51 and a worm gear 52 fixedly sleeved on the gear shaft 51, and the axis of the gear shaft 51 is parallel to the axis of the mandrel 3; wherein, the gear that the gear shaft 51 top was equipped with and the ring gear 10 meshing, worm 61 on the drive assembly 6 meshes with worm wheel 52, and dabber 3 floats under the effect of hydraulic pressure subassembly 2 and sets up in hydraulic pressure subassembly 2.
Because the load borne by the existing workbench is completely borne by the meshing part of the worm 61 and the worm wheel 52 when the existing workbench is continuously and heavily cut, and the worm 61 is easy to wear to generate a gap while bearing, and finally the precision of the rotary table is gradually reduced, the worm 61 rotates in the horizontal direction and is converted into the rotation of the gear shaft 51 in the vertical direction through the transmission of the worm wheel 52 and the worm 61 in the preferred embodiment of the invention, the disc surface 4 is fixed on the mandrel 3, the mandrel 3 is rotatably arranged in the oil pressure assembly 2 through the first bearing group 8 and the second bearing group 9, and the gear at the end part of the gear shaft 51 is meshed with the gear ring 10 of the disc surface 4, so that the disc surface 4 is driven to rotate. The invention adopts the arrangement of the worm gear and the worm gear shaft 51, so that the meshing surfaces of the worm gear 52 and the worm 61 are kept constant, the tooth surface friction loss generated by the sliding contact of the worm gear 52 and the worm 61 is avoided, the transmission precision and the transmission stability of the workbench are improved, the floating type mandrel 3 is designed, the coaxiality between the piston 23 and the mandrel 3 can be conveniently adjusted, and the positioning precision of the disc surface 4 is improved.
In the preferred embodiment of the present invention, the indexing table further comprises a locking and positioning device 7 coaxially disposed inside the gear ring 10, and including a first toothed disc fixed on the mounting interface seat 11 and a second toothed disc fixed on the disc surface 4; arc teeth which are matched with each other are arranged on the opposite surfaces of the first fluted disc and the second fluted disc.
After the workbench is precisely indexed, the arc-shaped rat fluted disc is positioned through high-precision grinding on the opposite surfaces of the first fluted disc and the second fluted disc, and the meshing and disengaging processes of the upper fluted disc and the lower fluted disc are equivalent to the lapping process of the two fluted discs, so that the turntable is good in precision retentivity, high in repeated positioning precision and capable of meeting the processing requirements of high-precision mechanical parts.
The workstation is lifting up rotatory in-process, there is the clearance between workstation and the bottom casing 1, lead to the dust easily, the inside that the clearance got into the workstation can be followed to processing piece etc., cause the influence to the meshing face of the spare part of inside, thereby influence transmission precision, consequently when guaranteeing the workstation normal pivoted, be equipped with the sealing washer in the clearance of bottom casing 1 and 4 outward flanges of quotation, play certain guard action to inside driving medium, the life of the inside driving medium of workstation has been prolonged.
In the preferred embodiment of the invention, the sealing plate is arranged on the bottom surface of the bottom shell 1, and the sealing plate is arranged, so that the installation convenience is improved, and meanwhile, a certain protection effect is realized on the inside of the workbench.
In the preferred embodiment of the present invention, the oil pressure assembly 2 includes an oil cylinder 21, an oil cylinder cover 22 and a piston 23; the oil cylinder 21 is fixed on the mounting interface seat 11 through a connecting flange at the end part; the oil cylinder cover 22 is fixed on the connecting flange and forms an annular oil cavity with the oil cylinder 21, the piston 23 is provided with an annular boss, and the annular boss is embedded into the annular oil cavity to form an oil inlet cavity 24 and an oil return cavity 25 for flowing of hydraulic oil.
The piston 23 drives the upper disc surface 4 of the mandrel 3 to move along the axis direction under the action of oil pressure, so that the first fluted disc and the second fluted disc are meshed and separated, and the implementation of the indexing of the workbench is ensured.
In order to ensure the lifting and falling stability of the disc surface 4, the annular boss on the piston 23 and the sliding surfaces at the two ends of the annular boss are sealed by the Gray rings 26, the imported Gray rings 26 are used for sealing, and the dynamic sealing with double functions is realized based on the characteristics of low friction, no creeping, high pressure resistance, high speed performance and the like of the O-shaped ring and the polytetrafluoroethylene sealing ring, so that the stability of oil pressure is ensured.
In the preferred embodiment of the invention, the sliding surfaces at the two ends of the annular boss are also provided with wear-resisting rings 27 to ensure that the piston and the oil cylinder cannot be glued and locked, and one end of the piston 23 close to the disc surface 4 is provided with a rotation stopping groove 28; a stopper 29 is fixed to the cylinder head 22 to be engaged with the rotation stop groove 28.
Specifically, the wear-resistant ring 27 provides a guiding and supporting function for the piston 23, and the stop 29 on the cylinder cover 22 limits the rotation of the piston 23 and absorbs the radial force generated by the piston 23 during the movement, so as to ensure that the greige ring 26 is not damaged by the radial force, prolong the service life of the oil pressure assembly 2 and further avoid the radial force generated by the cylinder 21.
In the preferred embodiment of the present invention, the inner hole of the piston 23 is provided with two annular grooves, the first bearing set 8 is disposed in each of the two annular grooves, and the first bearing set 8 is made of copper oil-retaining bearings.
The bottom of the mandrel 3 is in threaded connection with a supporting plate 32, and the top of the mandrel 3 is provided with a connecting disc 31; the supporting plate 32 and a step hole at the bottom of the oil cylinder 21 form a first placing groove, and the connecting disc 31 and a step hole at the top of the piston 23 form a second placing groove; second bearing group 9 has all been placed in first standing groove and the second standing groove, and second bearing group 9 adopts thrust cylindrical roller bearing.
Specifically, two oil-containing bearings arranged in the inner hole of the piston 23 are combined with the cylindrical roller bearing at the top of the piston 23 and the cylindrical roller bearing at the bottom of the oil cylinder 21, when the disk surface 4 needs to rotate, the piston 23 moves upwards under the action of hydraulic oil, so that the connecting disk 31 and the supporting plate 32 of the mandrel 3 synchronously clamp the cylindrical roller bearings at the top of the piston 23 and at the bottom of the oil cylinder 21, the rotating feasibility of the mandrel 3 is ensured, and the centering precision of the mandrel 3 and the bearing capacity of the workbench are improved.
In order to reduce the processing difficulty of the mandrel 3, the mandrel 3 adopts a split structure, and the connecting disc 31 of the mandrel 3 is fixed on the central shaft 33 of the mandrel 3 through a fastener.
Specifically, one end of the central shaft 33, which is close to the connecting disc 31, is provided with a flange step surface, a convex snap ring is arranged at the flange step surface, an upper ring of the cylindrical roller bearing is embedded into a groove formed by the convex snap ring and the flange step surface, and the mandrel 3 is designed in a split structure, so that the processing difficulty of the central shaft 33 is reduced, the production and manufacturing cost is reduced, and the centering precision of the central shaft 33 and the piston 23 is ensured.
In the preferred embodiment of the present invention, the transmission assembly 5 further includes a first rotating member 53, an upper pressing sleeve 54, a bearing seat 55, a lower pressing sleeve 56 and an adjusting structure 57, which are sequentially sleeved on the gear shaft 51;
the first rotating piece 53 is arranged at one end, close to the gear, of the gear shaft 51, the upper pressing sleeve 54 is fixed on a step shaft of the gear shaft 51 through a flat key, the worm gear 52 is fixedly sleeved on the upper pressing sleeve 54, the bearing seat 55 is arranged at one end, far away from the gear, the lower pressing sleeve 56 is fixed on the bearing seat 55, the upper pressing sleeve 54 abuts against an inner bearing ring inside the bearing seat 55, the lower pressing sleeve 56 abuts against an outer bearing ring, the bottom shell 1 is provided with an adjusting groove for embedding of a flange plate of the bearing seat 55, and the adjusting structure 57 is arranged on the flange plate.
Specifically, through the arrangement of the upper pressing sleeve 54 and the lower pressing sleeve 56, the worm wheel 52 is rotatably arranged on the gear shaft 51, so that the structure of the transmission assembly 5 is more compact, the coaxiality of the worm wheel 52 and the gear shaft 51 is ensured, the arrangement of the adjusting structure 57 is convenient for the worm wheel 52 and the worm 61 to be adjusted to a correct meshing position, and the transmission stability and reliability are effectively ensured.
Preferably, the adjusting assembly includes a plurality of tightening screws and a plurality of ejecting screws arranged along the circumferential direction of the bearing seat 55; the screwing screw penetrates through the flange disc and is screwed on the step surface of the adjusting groove; the ejection screw is screwed on the flange plate, and one end of the ejection screw extending out of the flange plate is abutted against the step surface of the adjusting groove.
Preferably, 8 screwing screws and 10 ejecting screws are arranged along the circumferential direction of the bearing seat 55, so that an 8-pull 10-top structure is formed, and the adjustment of the correct meshing position of the worm 61 of the worm wheel 52 is facilitated.
When the transmission assembly 5 enters the mounting hole between the bottom shell 1 and the mounting interface seat 11 from the bottom, the upper pressing sleeve 54 and the lower pressing sleeve 56 on the transmission assembly 5 have relative clamping force on the bearing seat 55, so that the relative position accuracy of the worm wheel 52 and the gear in the axial direction is ensured, the gear on the top of the gear shaft 51 is meshed with the gear ring 10, and the meshing accuracy of the worm wheel 52 and the worm 61 is ensured, while the arrangement of the first rotating piece 53 and the bearing seat 55 enables the gear shaft 51 to drive the worm wheel 52 to rotate, an adjusting gap is reserved between the top surface of the gear shaft 51 and the mounting hole, when 8 screwing screws and 10 ejecting screws on the bearing seat 55 act together, the position of the gear shaft 51 in the mounting hole is adjusted, the meshing accuracy of two meshing nodes is synchronously ensured, the mounting and debugging time is reduced, and the mounting difficulty is reduced. In the preferred embodiment of the present invention, a spacer 58 is provided between the upper pressing sleeve 54 and the lower pressing sleeve 56, so as to avoid the interference between the upper pressing sleeve 54 and the bearing seat 55 and ensure the feasibility of transmission.
In the preferred embodiment of the present invention, the driving assembly 6 comprises a worm 61, bearing units 62 rotatably disposed at two ends of the worm 61, and a servo motor 63 for driving the worm 61 to rotate; the servo motor 63 is connected to the worm 61 through a coupling, the two bearing units 62 are fixed to the bottom case 1, and the worm 61 is rotatably connected to the bottom case 1 through the two bearing units 62.
Specifically, the worm 61 rotates on the bottom shell 1 through the bearing unit 62, the bearing is convenient to disassemble, assemble and maintain, the processing difficulty of the bottom shell 1 is reduced, the locking pressing sleeve and the disc spring which are arranged at one end of the worm 61 far away from the servo motor 63 ensure the axial stability of the worm wheel 52 and the meshing accuracy of the upper fluted disc and the lower fluted disc, and the transmission precision of the worm wheel 52 and the worm 61 is improved.
In the preferred embodiment of the invention, the bottom shell 1 is provided with a mounting hole for mounting the oil mirror at the meshing position of the worm wheel 52 and the worm 61, the worm wheel 52 and the worm 61 are lubricated by oil, and the rotary sealing rings and the O-shaped rings arranged in the two bearing units 62 avoid lubricating oil leakage, effectively reduce abrasion and heat productivity, improve transmission efficiency and prolong the service life of the worm wheel 52 and the worm 61.
The disk surface 4 of the traditional workbench adopts a lever mechanism to indirectly send a signal when being lifted and dropped, so that faults are easy to occur, and the positioning precision of the workbench is difficult to control, therefore, the bottom shell 1 is provided with two photoelectric signal proximity switches for detecting the lifting or dropping of the disk surface 4.
In the implementation process of the invention, as shown in fig. 6, firstly, when the index table needs to be lifted, the numerical control device sends an index instruction, the oil inlet cavity 24 of the oil cylinder 21 enters pressure oil, the piston 23 pushes the mandrel 3 upwards to move synchronously, so that the first fluted disc is separated from the second fluted disc, the proximity switch responsible for the lifting action sends a completion signal, and at the moment, the index table completes the lifting action; secondly, when the indexing worktable rotates and indexes, the servo motor 63 drives the worm 61 to rotate after receiving a worktable lifting completion signal, and realizes the rotation of the gear shaft 51 based on the meshing of the worm 61 and the worm wheel 52, the gear on the gear shaft 51 realizes the rotation and the indexing with the gear ring 10 on the worktable, and the servo motor 63 stops rotating until the worktable completes the set rotation angle, and the rotation and the indexing of the indexing worktable are completed; finally, when the indexing table is positioned and clamped, as shown in fig. 1, pressure oil enters an oil return cavity 25 of the piston 23, the pressure oil in the oil inlet cavity 24 flows back through the throttle valve to limit the descending speed of the table, the tooth surface of the rat fluted disc is protected from being impacted, and the piston 23 moves downwards, so that the first fluted disc and the second fluted disc are re-meshed at a new position, and the positioning and clamping of the disc surface 4 are realized. The invention adopts the arrangement of the worm gear and the worm gear shaft 51, so that the meshing surfaces of the worm gear 52 and the worm 61 are kept constant, the tooth surface friction loss generated by the sliding contact between the worm gear 52 and the worm 61 is avoided, the transmission precision and the transmission stability of the workbench are improved, the floating type mandrel 3 is designed, the coaxiality between the piston 23 and the mandrel 3 can be conveniently adjusted, and the positioning precision of the disc surface 4 is improved.
It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (13)
1. Two tooth-like graduation workstation based on worm gear pair and gear compound drive, its characterized in that includes:
the bottom shell is provided with an inner cavity provided with a mounting interface seat, and a central mounting hole is formed in the mounting interface seat;
the oil pressure assembly is fixed in the central mounting hole;
the mandrel is coaxially arranged in the oil pressure assembly, and a first bearing set arranged in the axial direction and a second bearing set arranged in the radial direction enable the mandrel to be rotatably arranged in the oil pressure assembly;
the disc surface is fixed above the mandrel, and a gear ring is fixedly arranged on one side of the disc surface, which is close to the mounting interface seat;
the transmission assembly is rotatably arranged in the mounting hole between the bottom shell and the mounting interface seat and comprises a gear shaft and a worm wheel fixedly sleeved on the gear shaft;
the top of the gear shaft is provided with a gear meshed with the gear ring, a worm on the driving assembly is meshed with the worm wheel, and the mandrel is arranged in the oil pressure assembly in a floating mode under the action of the oil pressure assembly.
2. The two-piece toothed indexing table based on combined worm-gear and worm-gear drive according to claim 1, further comprising a locking and positioning device coaxially disposed inside the gear ring, the locking and positioning device comprising a first toothed disc fixed to the mounting medium seat and a second toothed disc fixed to the disc surface;
and arc-shaped teeth which are matched with each other are arranged on the opposite surfaces of the first fluted disc and the second fluted disc.
3. The two-piece geared index table based on a worm-and-gear combination drive of claim 1, wherein the oil pressure assembly comprises an oil cylinder, an oil cylinder cover, and a piston;
the oil cylinder is fixed on the mounting interface seat through a connecting flange at the end part;
the oil cylinder cover is fixed on the connecting flange and forms an annular oil cavity with the oil cylinder, the piston is provided with an annular boss, and the annular boss is embedded into the annular oil cavity to form an oil inlet cavity and an oil return cavity for flowing hydraulic oil.
4. The two-piece toothed indexing table based on worm-and-gear combined transmission according to claim 3, wherein the annular boss on the piston and the sliding surfaces at both ends of the annular boss are sealed by Gray rings.
5. The two-piece toothed indexing table based on worm-gear pair and gear compound transmission according to claim 4, wherein the sliding surfaces at both ends of the annular boss are further provided with wear-resistant rings.
6. The two-piece toothed indexing table based on worm-and-gear combined transmission of claim 5, wherein the piston is provided with a rotation stopping groove at one end close to the disc surface;
and a stop block clamped in the rotation stopping groove is fixed on the oil cylinder cover.
7. The two-piece toothed indexing table based on worm-and-gear compound transmission of claim 3, wherein the inner cavity of the piston is provided with two annular grooves, and the first bearing set is disposed in both of the two annular grooves;
the bottom of the mandrel is in threaded connection with a support plate, the top of the mandrel is provided with a connecting plate, the support plate and a step hole in the bottom of the oil cylinder form a first placing groove, the connecting plate and a step hole in the top of the piston form a second placing groove, and the second bearing group is placed in the first placing groove and the second placing groove.
8. The two-piece toothed indexing table based on worm-gear pair and gear compound transmission according to claim 7, wherein the first bearing set is made of copper oil-retaining bearings;
the second bearing group adopts a thrust cylindrical roller bearing.
9. The two-piece toothed indexing table based on worm-and-gear compound transmission of claim 1, wherein the transmission assembly further comprises a first rotating member, an upper pressing sleeve, a bearing seat and a lower pressing sleeve, which are sequentially sleeved on the gear shaft;
first rotation piece sets up the gear shaft is close to gear one end, it fixes through the parallel key to go up to press the cover on the step shaft of gear shaft, just the fixed cover of worm wheel is established go up to press on the cover, the bearing frame sets up and is keeping away from the one end of gear, it fixes to press the cover down on the bearing frame, it contradicts to go up to press the cover the bearing inner race inside the bearing frame, press the cover down and contradict on the bearing outer race, the bottom casing is equipped with the confession the adjustment tank of the ring flange embedding of bearing frame.
10. The two-piece toothed indexing table based on worm-and-gear compound transmission of claim 9, wherein the flange plate is provided with an adjusting structure, and the adjusting structure comprises a plurality of screwing screws and a plurality of ejecting screws arranged along the circumferential direction of the bearing seat;
the screwing screw penetrates through the flange plate and is screwed on the step surface of the adjusting groove;
the ejection screw is in threaded connection with the flange plate, and one end of the ejection screw, which extends out of the flange plate, abuts against the step surface of the adjusting groove.
11. The two-piece toothed indexing table based on worm-gear pair and gear compound transmission according to claim 1, wherein the driving assembly further comprises bearing units rotatably disposed at two ends of the worm, and a servo motor for driving the worm to rotate;
the servo motor is connected with the worm through a coupler, the two bearing units are fixed on the bottom shell, and the worm is rotatably connected on the bottom shell through the two bearing units.
12. The two-piece toothed indexing table based on worm-gear pair and gear compound transmission according to claim 1, wherein the bottom housing is provided with two photoelectric signal proximity switches for detecting the lifting or falling of the table surface.
13. The two-piece toothed indexing table based on worm-gear pair and gear compound transmission according to claim 7, wherein the spindle is a split structure, and the connecting disc is fixed on the central shaft of the spindle by a fastener.
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Cited By (1)
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| CN117102839A (en) * | 2023-10-23 | 2023-11-24 | 深圳市荣德机器人科技有限公司 | Automatic assembly equipment of harmonic reducer complete machine |
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| CN114273972B (en) | 2022-08-12 |
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